diff options
103 files changed, 3348 insertions, 517 deletions
diff --git a/Documentation/pti/pti_intel_mid.txt b/Documentation/pti/pti_intel_mid.txt new file mode 100644 index 000000000000..e7a5b6d1f7a9 --- /dev/null +++ b/Documentation/pti/pti_intel_mid.txt @@ -0,0 +1,99 @@ +The Intel MID PTI project is HW implemented in Intel Atom +system-on-a-chip designs based on the Parallel Trace +Interface for MIPI P1149.7 cJTAG standard. The kernel solution +for this platform involves the following files: + +./include/linux/pti.h +./drivers/.../n_tracesink.h +./drivers/.../n_tracerouter.c +./drivers/.../n_tracesink.c +./drivers/.../pti.c + +pti.c is the driver that enables various debugging features +popular on platforms from certain mobile manufacturers. +n_tracerouter.c and n_tracesink.c allow extra system information to +be collected and routed to the pti driver, such as trace +debugging data from a modem. Although n_tracerouter +and n_tracesink are a part of the complete PTI solution, +these two line disciplines can work separately from +pti.c and route any data stream from one /dev/tty node +to another /dev/tty node via kernel-space. This provides +a stable, reliable connection that will not break unless +the user-space application shuts down (plus avoids +kernel->user->kernel context switch overheads of routing +data). + +An example debugging usage for this driver system: + *Hook /dev/ttyPTI0 to syslogd. Opening this port will also start + a console device to further capture debugging messages to PTI. + *Hook /dev/ttyPTI1 to modem debugging data to write to PTI HW. + This is where n_tracerouter and n_tracesink are used. + *Hook /dev/pti to a user-level debugging application for writing + to PTI HW. + *Use mipi_* Kernel Driver API in other device drivers for + debugging to PTI by first requesting a PTI write address via + mipi_request_masterchannel(1). + +Below is example pseudo-code on how a 'privileged' application +can hook up n_tracerouter and n_tracesink to any tty on +a system. 'Privileged' means the application has enough +privileges to successfully manipulate the ldisc drivers +but is not just blindly executing as 'root'. Keep in mind +the use of ioctl(,TIOCSETD,) is not specific to the n_tracerouter +and n_tracesink line discpline drivers but is a generic +operation for a program to use a line discpline driver +on a tty port other than the default n_tty. + +/////////// To hook up n_tracerouter and n_tracesink ///////// + +// Note that n_tracerouter depends on n_tracesink. +#include <errno.h> +#define ONE_TTY "/dev/ttyOne" +#define TWO_TTY "/dev/ttyTwo" + +// needed global to hand onto ldisc connection +static int g_fd_source = -1; +static int g_fd_sink = -1; + +// these two vars used to grab LDISC values from loaded ldisc drivers +// in OS. Look at /proc/tty/ldiscs to get the right numbers from +// the ldiscs loaded in the system. +int source_ldisc_num, sink_ldisc_num = -1; +int retval; + +g_fd_source = open(ONE_TTY, O_RDWR); // must be R/W +g_fd_sink = open(TWO_TTY, O_RDWR); // must be R/W + +if (g_fd_source <= 0) || (g_fd_sink <= 0) { + // doubt you'll want to use these exact error lines of code + printf("Error on open(). errno: %d\n",errno); + return errno; +} + +retval = ioctl(g_fd_sink, TIOCSETD, &sink_ldisc_num); +if (retval < 0) { + printf("Error on ioctl(). errno: %d\n", errno); + return errno; +} + +retval = ioctl(g_fd_source, TIOCSETD, &source_ldisc_num); +if (retval < 0) { + printf("Error on ioctl(). errno: %d\n", errno); + return errno; +} + +/////////// To disconnect n_tracerouter and n_tracesink //////// + +// First make sure data through the ldiscs has stopped. + +// Second, disconnect ldiscs. This provides a +// little cleaner shutdown on tty stack. +sink_ldisc_num = 0; +source_ldisc_num = 0; +ioctl(g_fd_uart, TIOCSETD, &sink_ldisc_num); +ioctl(g_fd_gadget, TIOCSETD, &source_ldisc_num); + +// Three, program closes connection, and cleanup: +close(g_fd_uart); +close(g_fd_gadget); +g_fd_uart = g_fd_gadget = NULL; diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 320f71803a2b..b3f01996318f 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -355,26 +355,29 @@ static void hci_uart_tty_wakeup(struct tty_struct *tty) * flags pointer to flags for data * count count of received data in bytes * - * Return Value: None + * Return Value: Number of bytes received */ -static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count) +static unsigned int hci_uart_tty_receive(struct tty_struct *tty, + const u8 *data, char *flags, int count) { - int ret; struct hci_uart *hu = (void *)tty->disc_data; + int received; if (!hu || tty != hu->tty) - return; + return -ENODEV; if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) - return; + return -EINVAL; spin_lock(&hu->rx_lock); - ret = hu->proto->recv(hu, (void *) data, count); - if (ret > 0) - hu->hdev->stat.byte_rx += count; + received = hu->proto->recv(hu, (void *) data, count); + if (received > 0) + hu->hdev->stat.byte_rx += received; spin_unlock(&hu->rx_lock); tty_unthrottle(tty); + + return received; } static int hci_uart_register_dev(struct hci_uart *hu) diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c index 8755f5f3ad37..f3698967edf6 100644 --- a/drivers/input/serio/serport.c +++ b/drivers/input/serio/serport.c @@ -120,17 +120,21 @@ static void serport_ldisc_close(struct tty_struct *tty) * 'interrupt' routine. */ -static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count) +static unsigned int serport_ldisc_receive(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct serport *serport = (struct serport*) tty->disc_data; unsigned long flags; unsigned int ch_flags; + int ret = 0; int i; spin_lock_irqsave(&serport->lock, flags); - if (!test_bit(SERPORT_ACTIVE, &serport->flags)) + if (!test_bit(SERPORT_ACTIVE, &serport->flags)) { + ret = -EINVAL; goto out; + } for (i = 0; i < count; i++) { switch (fp[i]) { @@ -152,6 +156,8 @@ static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *c out: spin_unlock_irqrestore(&serport->lock, flags); + + return ret == 0 ? count : ret; } /* diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c index 86a5c4f7775e..1d44d470897c 100644 --- a/drivers/isdn/gigaset/ser-gigaset.c +++ b/drivers/isdn/gigaset/ser-gigaset.c @@ -674,7 +674,7 @@ gigaset_tty_ioctl(struct tty_struct *tty, struct file *file, * cflags buffer containing error flags for received characters (ignored) * count number of received characters */ -static void +static unsigned int gigaset_tty_receive(struct tty_struct *tty, const unsigned char *buf, char *cflags, int count) { @@ -683,12 +683,12 @@ gigaset_tty_receive(struct tty_struct *tty, const unsigned char *buf, struct inbuf_t *inbuf; if (!cs) - return; + return -ENODEV; inbuf = cs->inbuf; if (!inbuf) { dev_err(cs->dev, "%s: no inbuf\n", __func__); cs_put(cs); - return; + return -EINVAL; } tail = inbuf->tail; @@ -725,6 +725,8 @@ gigaset_tty_receive(struct tty_struct *tty, const unsigned char *buf, gig_dbg(DEBUG_INTR, "%s-->BH", __func__); gigaset_schedule_event(cs); cs_put(cs); + + return count; } /* diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index d80dcdee88f3..4e349cd98bcf 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -144,6 +144,19 @@ config PHANTOM If you choose to build module, its name will be phantom. If unsure, say N here. +config INTEL_MID_PTI + tristate "Parallel Trace Interface for MIPI P1149.7 cJTAG standard" + default n + help + The PTI (Parallel Trace Interface) driver directs + trace data routed from various parts in the system out + through an Intel Penwell PTI port and out of the mobile + device for analysis with a debugging tool (Lauterbach or Fido). + + You should select this driver if the target kernel is meant for + an Intel Atom (non-netbook) mobile device containing a MIPI + P1149.7 standard implementation. + config SGI_IOC4 tristate "SGI IOC4 Base IO support" depends on PCI @@ -459,7 +472,7 @@ config BMP085 module will be called bmp085. config PCH_PHUB - tristate "PCH Packet Hub of Intel Topcliff / OKI SEMICONDUCTOR ML7213" + tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223) PHUB" depends on PCI help This driver is for PCH(Platform controller Hub) PHUB(Packet Hub) of @@ -467,10 +480,12 @@ config PCH_PHUB processor. The Topcliff has MAC address and Option ROM data in SROM. This driver can access MAC address and Option ROM data in SROM. - This driver also can be used for OKI SEMICONDUCTOR's ML7213 which is - for IVI(In-Vehicle Infotainment) use. - ML7213 is companion chip for Intel Atom E6xx series. - ML7213 is completely compatible for Intel EG20T PCH. + This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ + Output Hub), ML7213 and ML7223. + ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is + for MP(Media Phone) use. + ML7213/ML7223 is companion chip for Intel Atom E6xx series. + ML7213/ML7223 is completely compatible for Intel EG20T PCH. To compile this driver as a module, choose M here: the module will be called pch_phub. diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 848e8464faab..5f03172cc0b5 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_IBM_ASM) += ibmasm/ obj-$(CONFIG_AD525X_DPOT) += ad525x_dpot.o obj-$(CONFIG_AD525X_DPOT_I2C) += ad525x_dpot-i2c.o obj-$(CONFIG_AD525X_DPOT_SPI) += ad525x_dpot-spi.o +0bj-$(CONFIG_INTEL_MID_PTI) += pti.o obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c index a19cb710a246..5fe79df44838 100644 --- a/drivers/misc/pch_phub.c +++ b/drivers/misc/pch_phub.c @@ -34,12 +34,18 @@ #define PHUB_TIMEOUT 0x05 /* Time out value for Status Register */ #define PCH_PHUB_ROM_WRITE_ENABLE 0x01 /* Enabling for writing ROM */ #define PCH_PHUB_ROM_WRITE_DISABLE 0x00 /* Disabling for writing ROM */ -#define PCH_PHUB_MAC_START_ADDR 0x20C /* MAC data area start address offset */ -#define PCH_PHUB_ROM_START_ADDR_EG20T 0x14 /* ROM data area start address offset +#define PCH_PHUB_MAC_START_ADDR_EG20T 0x14 /* MAC data area start address + offset */ +#define PCH_PHUB_MAC_START_ADDR_ML7223 0x20C /* MAC data area start address + offset */ +#define PCH_PHUB_ROM_START_ADDR_EG20T 0x80 /* ROM data area start address offset (Intel EG20T PCH)*/ #define PCH_PHUB_ROM_START_ADDR_ML7213 0x400 /* ROM data area start address offset(OKI SEMICONDUCTOR ML7213) */ +#define PCH_PHUB_ROM_START_ADDR_ML7223 0x400 /* ROM data area start address + offset(OKI SEMICONDUCTOR ML7223) + */ /* MAX number of INT_REDUCE_CONTROL registers */ #define MAX_NUM_INT_REDUCE_CONTROL_REG 128 @@ -63,6 +69,10 @@ #define PCI_VENDOR_ID_ROHM 0x10db #define PCI_DEVICE_ID_ROHM_ML7213_PHUB 0x801A +/* Macros for ML7223 */ +#define PCI_DEVICE_ID_ROHM_ML7223_mPHUB 0x8012 /* for Bus-m */ +#define PCI_DEVICE_ID_ROHM_ML7223_nPHUB 0x8002 /* for Bus-n */ + /* SROM ACCESS Macro */ #define PCH_WORD_ADDR_MASK (~((1 << 2) - 1)) @@ -100,6 +110,9 @@ * @clkcfg_reg: CLK CFG register val * @pch_phub_base_address: Register base address * @pch_phub_extrom_base_address: external rom base address + * @pch_mac_start_address: MAC address area start address + * @pch_opt_rom_start_address: Option ROM start address + * @ioh_type: Save IOH type */ struct pch_phub_reg { u32 phub_id_reg; @@ -117,6 +130,9 @@ struct pch_phub_reg { u32 clkcfg_reg; void __iomem *pch_phub_base_address; void __iomem *pch_phub_extrom_base_address; + u32 pch_mac_start_address; + u32 pch_opt_rom_start_address; + int ioh_type; }; /* SROM SPEC for MAC address assignment offset */ @@ -319,7 +335,7 @@ static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip, { unsigned int mem_addr; - mem_addr = PCH_PHUB_ROM_START_ADDR_EG20T + + mem_addr = chip->pch_mac_start_address + pch_phub_mac_offset[offset_address]; pch_phub_read_serial_rom(chip, mem_addr, data); @@ -336,7 +352,7 @@ static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip, int retval; unsigned int mem_addr; - mem_addr = PCH_PHUB_ROM_START_ADDR_EG20T + + mem_addr = chip->pch_mac_start_address + pch_phub_mac_offset[offset_address]; retval = pch_phub_write_serial_rom(chip, mem_addr, data); @@ -384,6 +400,48 @@ static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip) return retval; } +/* pch_phub_gbe_serial_rom_conf_mp - makes SerialROM header format configuration + * for Gigabit Ethernet MAC address + */ +static int pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg *chip) +{ + int retval; + u32 offset_addr; + + offset_addr = 0x200; + retval = pch_phub_write_serial_rom(chip, 0x03 + offset_addr, 0xbc); + retval |= pch_phub_write_serial_rom(chip, 0x02 + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x01 + offset_addr, 0x40); + retval |= pch_phub_write_serial_rom(chip, 0x00 + offset_addr, 0x02); + + retval |= pch_phub_write_serial_rom(chip, 0x07 + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x06 + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x05 + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x04 + offset_addr, 0x80); + + retval |= pch_phub_write_serial_rom(chip, 0x0b + offset_addr, 0xbc); + retval |= pch_phub_write_serial_rom(chip, 0x0a + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x09 + offset_addr, 0x40); + retval |= pch_phub_write_serial_rom(chip, 0x08 + offset_addr, 0x18); + + retval |= pch_phub_write_serial_rom(chip, 0x13 + offset_addr, 0xbc); + retval |= pch_phub_write_serial_rom(chip, 0x12 + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x11 + offset_addr, 0x40); + retval |= pch_phub_write_serial_rom(chip, 0x10 + offset_addr, 0x19); + + retval |= pch_phub_write_serial_rom(chip, 0x1b + offset_addr, 0xbc); + retval |= pch_phub_write_serial_rom(chip, 0x1a + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x19 + offset_addr, 0x40); + retval |= pch_phub_write_serial_rom(chip, 0x18 + offset_addr, 0x3a); + + retval |= pch_phub_write_serial_rom(chip, 0x1f + offset_addr, 0x01); + retval |= pch_phub_write_serial_rom(chip, 0x1e + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x1d + offset_addr, 0x00); + retval |= pch_phub_write_serial_rom(chip, 0x1c + offset_addr, 0x00); + + return retval; +} + /** * pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address * @offset_address: Gigabit Ethernet MAC address offset value. @@ -406,7 +464,10 @@ static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data) int retval; int i; - retval = pch_phub_gbe_serial_rom_conf(chip); + if (chip->ioh_type == 1) /* EG20T */ + retval = pch_phub_gbe_serial_rom_conf(chip); + else /* ML7223 */ + retval = pch_phub_gbe_serial_rom_conf_mp(chip); if (retval) return retval; @@ -441,12 +502,16 @@ static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj, } /* Get Rom signature */ - pch_phub_read_serial_rom(chip, 0x80, (unsigned char *)&rom_signature); + pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address, + (unsigned char *)&rom_signature); rom_signature &= 0xff; - pch_phub_read_serial_rom(chip, 0x81, (unsigned char *)&tmp); + pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address + 1, + (unsigned char *)&tmp); rom_signature |= (tmp & 0xff) << 8; if (rom_signature == 0xAA55) { - pch_phub_read_serial_rom(chip, 0x82, &rom_length); + pch_phub_read_serial_rom(chip, + chip->pch_opt_rom_start_address + 2, + &rom_length); orom_size = rom_length * 512; if (orom_size < off) { addr_offset = 0; @@ -458,8 +523,9 @@ static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj, } for (addr_offset = 0; addr_offset < count; addr_offset++) { - pch_phub_read_serial_rom(chip, 0x80 + addr_offset + off, - &buf[addr_offset]); + pch_phub_read_serial_rom(chip, + chip->pch_opt_rom_start_address + addr_offset + off, + &buf[addr_offset]); } } else { err = -ENODATA; @@ -502,8 +568,9 @@ static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj, if (PCH_PHUB_OROM_SIZE < off + addr_offset) goto return_ok; - ret = pch_phub_write_serial_rom(chip, 0x80 + addr_offset + off, - buf[addr_offset]); + ret = pch_phub_write_serial_rom(chip, + chip->pch_opt_rom_start_address + addr_offset + off, + buf[addr_offset]); if (ret) { err = ret; goto return_err; @@ -603,19 +670,22 @@ static int __devinit pch_phub_probe(struct pci_dev *pdev, dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value " "in pch_phub_base_address variable is %p\n", __func__, chip->pch_phub_base_address); - chip->pch_phub_extrom_base_address = pci_map_rom(pdev, &rom_size); - if (chip->pch_phub_extrom_base_address == 0) { - dev_err(&pdev->dev, "%s : pci_map_rom FAILED", __func__); - ret = -ENOMEM; - goto err_pci_map; + if (id->driver_data != 3) { + chip->pch_phub_extrom_base_address =\ + pci_map_rom(pdev, &rom_size); + if (chip->pch_phub_extrom_base_address == 0) { + dev_err(&pdev->dev, "%s: pci_map_rom FAILED", __func__); + ret = -ENOMEM; + goto err_pci_map; + } + dev_dbg(&pdev->dev, "%s : " + "pci_map_rom SUCCESS and value in " + "pch_phub_extrom_base_address variable is %p\n", + __func__, chip->pch_phub_extrom_base_address); } - dev_dbg(&pdev->dev, "%s : " - "pci_map_rom SUCCESS and value in " - "pch_phub_extrom_base_address variable is %p\n", __func__, - chip->pch_phub_extrom_base_address); - if (id->driver_data == 1) { + if (id->driver_data == 1) { /* EG20T PCH */ retval = sysfs_create_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr); if (retval) @@ -642,7 +712,9 @@ static int __devinit pch_phub_probe(struct pci_dev *pdev, iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14); /* set the interrupt delay value */ iowrite32(0x25, chip->pch_phub_base_address + 0x44); - } else if (id->driver_data == 2) { + chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T; + chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T; + } else if (id->driver_data == 2) { /* ML7213 IOH */ retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr); if (retval) goto err_sysfs_create; @@ -653,7 +725,38 @@ static int __devinit pch_phub_probe(struct pci_dev *pdev, * Device8(USB OHCI #0/ USB EHCI #0):a */ iowrite32(0x000affa0, chip->pch_phub_base_address + 0x14); + chip->pch_opt_rom_start_address =\ + PCH_PHUB_ROM_START_ADDR_ML7213; + } else if (id->driver_data == 3) { /* ML7223 IOH Bus-m*/ + /* set the prefech value + * Device8(GbE) + */ + iowrite32(0x000a0000, chip->pch_phub_base_address + 0x14); + chip->pch_opt_rom_start_address =\ + PCH_PHUB_ROM_START_ADDR_ML7223; + chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223; + } else if (id->driver_data == 4) { /* ML7223 IOH Bus-n*/ + retval = sysfs_create_file(&pdev->dev.kobj, + &dev_attr_pch_mac.attr); + if (retval) + goto err_sysfs_create; + retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr); + if (retval) + goto exit_bin_attr; + /* set the prefech value + * Device2(USB OHCI #0,1,2,3/ USB EHCI #0):a + * Device4(SDIO #0,1):f + * Device6(SATA 2):f + */ + iowrite32(0x0000ffa0, chip->pch_phub_base_address + 0x14); + /* set the interrupt delay value */ + iowrite32(0x25, chip->pch_phub_base_address + 0x140); + chip->pch_opt_rom_start_address =\ + PCH_PHUB_ROM_START_ADDR_ML7223; + chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223; } + + chip->ioh_type = id->driver_data; pci_set_drvdata(pdev, chip); return 0; @@ -733,6 +836,8 @@ static int pch_phub_resume(struct pci_dev *pdev) static struct pci_device_id pch_phub_pcidev_id[] = { { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH1_PHUB), 1, }, { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7213_PHUB), 2, }, + { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_mPHUB), 3, }, + { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_nPHUB), 4, }, { } }; MODULE_DEVICE_TABLE(pci, pch_phub_pcidev_id); @@ -759,5 +864,5 @@ static void __exit pch_phub_pci_exit(void) module_init(pch_phub_pci_init); module_exit(pch_phub_pci_exit); -MODULE_DESCRIPTION("PCH Packet Hub PCI Driver"); +MODULE_DESCRIPTION("Intel EG20T PCH/OKI SEMICONDUCTOR IOH(ML7213/ML7223) PHUB"); MODULE_LICENSE("GPL"); diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c new file mode 100644 index 000000000000..bb6f9255c17c --- /dev/null +++ b/drivers/misc/pti.c @@ -0,0 +1,980 @@ +/* + * pti.c - PTI driver for cJTAG data extration + * + * Copyright (C) Intel 2010 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * The PTI (Parallel Trace Interface) driver directs trace data routed from + * various parts in the system out through the Intel Penwell PTI port and + * out of the mobile device for analysis with a debugging tool + * (Lauterbach, Fido). This is part of a solution for the MIPI P1149.7, + * compact JTAG, standard. + */ + +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/console.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/pci.h> +#include <linux/mutex.h> +#include <linux/miscdevice.h> +#include <linux/pti.h> + +#define DRIVERNAME "pti" +#define PCINAME "pciPTI" +#define TTYNAME "ttyPTI" +#define CHARNAME "pti" +#define PTITTY_MINOR_START 0 +#define PTITTY_MINOR_NUM 2 +#define MAX_APP_IDS 16 /* 128 channel ids / u8 bit size */ +#define MAX_OS_IDS 16 /* 128 channel ids / u8 bit size */ +#define MAX_MODEM_IDS 16 /* 128 channel ids / u8 bit size */ +#define MODEM_BASE_ID 71 /* modem master ID address */ +#define CONTROL_ID 72 /* control master ID address */ +#define CONSOLE_ID 73 /* console master ID address */ +#define OS_BASE_ID 74 /* base OS master ID address */ +#define APP_BASE_ID 80 /* base App master ID address */ +#define CONTROL_FRAME_LEN 32 /* PTI control frame maximum size */ +#define USER_COPY_SIZE 8192 /* 8Kb buffer for user space copy */ +#define APERTURE_14 0x3800000 /* offset to first OS write addr */ +#define APERTURE_LEN 0x400000 /* address length */ + +struct pti_tty { + struct pti_masterchannel *mc; +}; + +struct pti_dev { + struct tty_port port; + unsigned long pti_addr; + unsigned long aperture_base; + void __iomem *pti_ioaddr; + u8 ia_app[MAX_APP_IDS]; + u8 ia_os[MAX_OS_IDS]; + u8 ia_modem[MAX_MODEM_IDS]; +}; + +/* + * This protects access to ia_app, ia_os, and ia_modem, + * which keeps track of channels allocated in + * an aperture write id. + */ +static DEFINE_MUTEX(alloclock); + +static struct pci_device_id pci_ids[] __devinitconst = { + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x82B)}, + {0} +}; + +static struct tty_driver *pti_tty_driver; +static struct pti_dev *drv_data; + +static unsigned int pti_console_channel; +static unsigned int pti_control_channel; + +/** + * pti_write_to_aperture()- The private write function to PTI HW. + * + * @mc: The 'aperture'. It's part of a write address that holds + * a master and channel ID. + * @buf: Data being written to the HW that will ultimately be seen + * in a debugging tool (Fido, Lauterbach). + * @len: Size of buffer. + * + * Since each aperture is specified by a unique + * master/channel ID, no two processes will be writing + * to the same aperture at the same time so no lock is required. The + * PTI-Output agent will send these out in the order that they arrived, and + * thus, it will intermix these messages. The debug tool can then later + * regroup the appropriate message segments together reconstituting each + * message. + */ +static void pti_write_to_aperture(struct pti_masterchannel *mc, + u8 *buf, + int len) +{ + int dwordcnt; + int final; + int i; + u32 ptiword; + u32 __iomem *aperture; + u8 *p = buf; + + /* + * calculate the aperture offset from the base using the master and + * channel id's. + */ + aperture = drv_data->pti_ioaddr + (mc->master << 15) + + (mc->channel << 8); + + dwordcnt = len >> 2; + final = len - (dwordcnt << 2); /* final = trailing bytes */ + if (final == 0 && dwordcnt != 0) { /* always need a final dword */ + final += 4; + dwordcnt--; + } + + for (i = 0; i < dwordcnt; i++) { + ptiword = be32_to_cpu(*(u32 *)p); + p += 4; + iowrite32(ptiword, aperture); + } + + aperture += PTI_LASTDWORD_DTS; /* adding DTS signals that is EOM */ + + ptiword = 0; + for (i = 0; i < final; i++) + ptiword |= *p++ << (24-(8*i)); + + iowrite32(ptiword, aperture); + return; +} + +/** + * pti_control_frame_built_and_sent()- control frame build and send function. + * + * @mc: The master / channel structure on which the function + * built a control frame. + * + * To be able to post process the PTI contents on host side, a control frame + * is added before sending any PTI content. So the host side knows on + * each PTI frame the name of the thread using a dedicated master / channel. + * The thread name is retrieved from the 'current' global variable. + * This function builds this frame and sends it to a master ID CONTROL_ID. + * The overhead is only 32 bytes since the driver only writes to HW + * in 32 byte chunks. + */ + +static void pti_control_frame_built_and_sent(struct pti_masterchannel *mc) +{ + struct pti_masterchannel mccontrol = {.master = CONTROL_ID, + .channel = 0}; + const char *control_format = "%3d %3d %s"; + u8 control_frame[CONTROL_FRAME_LEN]; + + /* + * Since we access the comm member in current's task_struct, + * we only need to be as large as what 'comm' in that + * structure is. + */ + char comm[TASK_COMM_LEN]; + + if (!in_interrupt()) + get_task_comm(comm, current); + else + strncpy(comm, "Interrupt", TASK_COMM_LEN); + + /* Absolutely ensure our buffer is zero terminated. */ + comm[TASK_COMM_LEN-1] = 0; + + mccontrol.channel = pti_control_channel; + pti_control_channel = (pti_control_channel + 1) & 0x7f; + + snprintf(control_frame, CONTROL_FRAME_LEN, control_format, mc->master, + mc->channel, comm); + pti_write_to_aperture(&mccontrol, control_frame, strlen(control_frame)); +} + +/** + * pti_write_full_frame_to_aperture()- high level function to + * write to PTI. + * + * @mc: The 'aperture'. It's part of a write address that holds + * a master and channel ID. + * @buf: Data being written to the HW that will ultimately be seen + * in a debugging tool (Fido, Lauterbach). + * @len: Size of buffer. + * + * All threads sending data (either console, user space application, ...) + * are calling the high level function to write to PTI meaning that it is + * possible to add a control frame before sending the content. + */ +static void pti_write_full_frame_to_aperture(struct pti_masterchannel *mc, + const unsigned char *buf, + int len) +{ + pti_control_frame_built_and_sent(mc); + pti_write_to_aperture(mc, (u8 *)buf, len); +} + +/** + * get_id()- Allocate a master and channel ID. + * + * @id_array: an array of bits representing what channel + * id's are allocated for writing. + * @max_ids: The max amount of available write IDs to use. + * @base_id: The starting SW channel ID, based on the Intel + * PTI arch. + * + * Returns: + * pti_masterchannel struct with master, channel ID address + * 0 for error + * + * Each bit in the arrays ia_app and ia_os correspond to a master and + * channel id. The bit is one if the id is taken and 0 if free. For + * every master there are 128 channel id's. + */ +static struct pti_masterchannel *get_id(u8 *id_array, int max_ids, int base_id) +{ + struct pti_masterchannel *mc; + int i, j, mask; + + mc = kmalloc(sizeof(struct pti_masterchannel), GFP_KERNEL); + if (mc == NULL) + return NULL; + + /* look for a byte with a free bit */ + for (i = 0; i < max_ids; i++) + if (id_array[i] != 0xff) + break; + if (i == max_ids) { + kfree(mc); + return NULL; + } + /* find the bit in the 128 possible channel opportunities */ + mask = 0x80; + for (j = 0; j < 8; j++) { + if ((id_array[i] & mask) == 0) + break; + mask >>= 1; + } + + /* grab it */ + id_array[i] |= mask; + mc->master = base_id; + mc->channel = ((i & 0xf)<<3) + j; + /* write new master Id / channel Id allocation to channel control */ + pti_control_frame_built_and_sent(mc); + return mc; +} + +/* + * The following three functions: + * pti_request_mastercahannel(), mipi_release_masterchannel() + * and pti_writedata() are an API for other kernel drivers to + * access PTI. + */ + +/** + * pti_request_masterchannel()- Kernel API function used to allocate + * a master, channel ID address + * to write to PTI HW. + * + * @type: 0- request Application master, channel aperture ID write address. + * 1- request OS master, channel aperture ID write + * address. + * 2- request Modem master, channel aperture ID + * write address. + * Other values, error. + * + * Returns: + * pti_masterchannel struct + * 0 for error + */ +struct pti_masterchannel *pti_request_masterchannel(u8 type) +{ + struct pti_masterchannel *mc; + + mutex_lock(&alloclock); + + switch (type) { + + case 0: + mc = get_id(drv_data->ia_app, MAX_APP_IDS, APP_BASE_ID); + break; + + case 1: + mc = get_id(drv_data->ia_os, MAX_OS_IDS, OS_BASE_ID); + break; + + case 2: + mc = get_id(drv_data->ia_modem, MAX_MODEM_IDS, MODEM_BASE_ID); + break; + default: + mc = NULL; + } + + mutex_unlock(&alloclock); + return mc; +} +EXPORT_SYMBOL_GPL(pti_request_masterchannel); + +/** + * pti_release_masterchannel()- Kernel API function used to release + * a master, channel ID address + * used to write to PTI HW. + * + * @mc: master, channel apeture ID address to be released. + */ +void pti_release_masterchannel(struct pti_masterchannel *mc) +{ + u8 master, channel, i; + + mutex_lock(&alloclock); + + if (mc) { + master = mc->master; + channel = mc->channel; + + if (master == APP_BASE_ID) { + i = channel >> 3; + drv_data->ia_app[i] &= ~(0x80>>(channel & 0x7)); + } else if (master == OS_BASE_ID) { + i = channel >> 3; + drv_data->ia_os[i] &= ~(0x80>>(channel & 0x7)); + } else { + i = channel >> 3; + drv_data->ia_modem[i] &= ~(0x80>>(channel & 0x7)); + } + + kfree(mc); + } + + mutex_unlock(&alloclock); +} +EXPORT_SYMBOL_GPL(pti_release_masterchannel); + +/** + * pti_writedata()- Kernel API function used to write trace + * debugging data to PTI HW. + * + * @mc: Master, channel aperture ID address to write to. + * Null value will return with no write occurring. + * @buf: Trace debuging data to write to the PTI HW. + * Null value will return with no write occurring. + * @count: Size of buf. Value of 0 or a negative number will + * return with no write occuring. + */ +void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count) +{ + /* + * since this function is exported, this is treated like an + * API function, thus, all parameters should + * be checked for validity. + */ + if ((mc != NULL) && (buf != NULL) && (count > 0)) + pti_write_to_aperture(mc, buf, count); + return; +} +EXPORT_SYMBOL_GPL(pti_writedata); + +/** + * pti_pci_remove()- Driver exit method to remove PTI from + * PCI bus. + * @pdev: variable containing pci info of PTI. + */ +static void __devexit pti_pci_remove(struct pci_dev *pdev) +{ + struct pti_dev *drv_data; + + drv_data = pci_get_drvdata(pdev); + if (drv_data != NULL) { + pci_iounmap(pdev, drv_data->pti_ioaddr); + pci_set_drvdata(pdev, NULL); + kfree(drv_data); + pci_release_region(pdev, 1); + pci_disable_device(pdev); + } +} + +/* + * for the tty_driver_*() basic function descriptions, see tty_driver.h. + * Specific header comments made for PTI-related specifics. + */ + +/** + * pti_tty_driver_open()- Open an Application master, channel aperture + * ID to the PTI device via tty device. + * + * @tty: tty interface. + * @filp: filp interface pased to tty_port_open() call. + * + * Returns: + * int, 0 for success + * otherwise, fail value + * + * The main purpose of using the tty device interface is for + * each tty port to have a unique PTI write aperture. In an + * example use case, ttyPTI0 gets syslogd and an APP aperture + * ID and ttyPTI1 is where the n_tracesink ldisc hooks to route + * modem messages into PTI. Modem trace data does not have to + * go to ttyPTI1, but ttyPTI0 and ttyPTI1 do need to be distinct + * master IDs. These messages go through the PTI HW and out of + * the handheld platform and to the Fido/Lauterbach device. + */ +static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp) +{ + /* + * we actually want to allocate a new channel per open, per + * system arch. HW gives more than plenty channels for a single + * system task to have its own channel to write trace data. This + * also removes a locking requirement for the actual write + * procedure. + */ + return tty_port_open(&drv_data->port, tty, filp); +} + +/** + * pti_tty_driver_close()- close tty device and release Application + * master, channel aperture ID to the PTI device via tty device. + * + * @tty: tty interface. + * @filp: filp interface pased to tty_port_close() call. + * + * The main purpose of using the tty device interface is to route + * syslog daemon messages to the PTI HW and out of the handheld platform + * and to the Fido/Lauterbach device. + */ +static void pti_tty_driver_close(struct tty_struct *tty, struct file *filp) +{ + tty_port_close(&drv_data->port, tty, filp); +} + +/** + * pti_tty_intstall()- Used to set up specific master-channels + * to tty ports for organizational purposes when + * tracing viewed from debuging tools. + * + * @driver: tty driver information. + * @tty: tty struct containing pti information. + * + * Returns: + * 0 for success + * otherwise, error + */ +static int pti_tty_install(struct tty_driver *driver, struct tty_struct *tty) +{ + int idx = tty->index; + struct pti_tty *pti_tty_data; + int ret = tty_init_termios(tty); + + if (ret == 0) { + tty_driver_kref_get(driver); + tty->count++; + driver->ttys[idx] = tty; + + pti_tty_data = kmalloc(sizeof(struct pti_tty), GFP_KERNEL); + if (pti_tty_data == NULL) + return -ENOMEM; + + if (idx == PTITTY_MINOR_START) + pti_tty_data->mc = pti_request_masterchannel(0); + else + pti_tty_data->mc = pti_request_masterchannel(2); + + if (pti_tty_data->mc == NULL) + return -ENXIO; + tty->driver_data = pti_tty_data; + } + + return ret; +} + +/** + * pti_tty_cleanup()- Used to de-allocate master-channel resources + * tied to tty's of this driver. + * + * @tty: tty struct containing pti information. + */ +static void pti_tty_cleanup(struct tty_struct *tty) +{ + struct pti_tty *pti_tty_data = tty->driver_data; + if (pti_tty_data == NULL) + return; + pti_release_masterchannel(pti_tty_data->mc); + kfree(tty->driver_data); + tty->driver_data = NULL; +} + +/** + * pti_tty_driver_write()- Write trace debugging data through the char + * interface to the PTI HW. Part of the misc device implementation. + * + * @filp: Contains private data which is used to obtain + * master, channel write ID. + * @data: trace data to be written. + * @len: # of byte to write. + * + * Returns: + * int, # of bytes written + * otherwise, error + */ +static int pti_tty_driver_write(struct tty_struct *tty, + const unsigned char *buf, int len) +{ + struct pti_tty *pti_tty_data = tty->driver_data; + if ((pti_tty_data != NULL) && (pti_tty_data->mc != NULL)) { + pti_write_to_aperture(pti_tty_data->mc, (u8 *)buf, len); + return len; + } + /* + * we can't write to the pti hardware if the private driver_data + * and the mc address is not there. + */ + else + return -EFAULT; +} + +/** + * pti_tty_write_room()- Always returns 2048. + * + * @tty: contains tty info of the pti driver. + */ +static int pti_tty_write_room(struct tty_struct *tty) +{ + return 2048; +} + +/** + * pti_char_open()- Open an Application master, channel aperture + * ID to the PTI device. Part of the misc device implementation. + * + * @inode: not used. + * @filp: Output- will have a masterchannel struct set containing + * the allocated application PTI aperture write address. + * + * Returns: + * int, 0 for success + * otherwise, a fail value + */ +static int pti_char_open(struct inode *inode, struct file *filp) +{ + struct pti_masterchannel *mc; + + /* + * We really do want to fail immediately if + * pti_request_masterchannel() fails, + * before assigning the value to filp->private_data. + * Slightly easier to debug if this driver needs debugging. + */ + mc = pti_request_masterchannel(0); + if (mc == NULL) + return -ENOMEM; + filp->private_data = mc; + return 0; +} + +/** + * pti_char_release()- Close a char channel to the PTI device. Part + * of the misc device implementation. + * + * @inode: Not used in this implementaiton. + * @filp: Contains private_data that contains the master, channel + * ID to be released by the PTI device. + * + * Returns: + * always 0 + */ +static int pti_char_release(struct inode *inode, struct file *filp) +{ + pti_release_masterchannel(filp->private_data); + kfree(filp->private_data); + return 0; +} + +/** + * pti_char_write()- Write trace debugging data through the char + * interface to the PTI HW. Part of the misc device implementation. + * + * @filp: Contains private data which is used to obtain + * master, channel write ID. + * @data: trace data to be written. + * @len: # of byte to write. + * @ppose: Not used in this function implementation. + * + * Returns: + * int, # of bytes written + * otherwise, error value + * + * Notes: From side discussions with Alan Cox and experimenting + * with PTI debug HW like Nokia's Fido box and Lauterbach + * devices, 8192 byte write buffer used by USER_COPY_SIZE was + * deemed an appropriate size for this type of usage with + * debugging HW. + */ +static ssize_t pti_char_write(struct file *filp, const char __user *data, + size_t len, loff_t *ppose) +{ + struct pti_masterchannel *mc; + void *kbuf; + const char __user *tmp; + size_t size = USER_COPY_SIZE; + size_t n = 0; + + tmp = data; + mc = filp->private_data; + + kbuf = kmalloc(size, GFP_KERNEL); + if (kbuf == NULL) { + pr_err("%s(%d): buf allocation failed\n", + __func__, __LINE__); + return -ENOMEM; + } + + do { + if (len - n > USER_COPY_SIZE) + size = USER_COPY_SIZE; + else + size = len - n; + + if (copy_from_user(kbuf, tmp, size)) { + kfree(kbuf); + return n ? n : -EFAULT; + } + + pti_write_to_aperture(mc, kbuf, size); + n += size; + tmp += size; + + } while (len > n); + + kfree(kbuf); + return len; +} + +static const struct tty_operations pti_tty_driver_ops = { + .open = pti_tty_driver_open, + .close = pti_tty_driver_close, + .write = pti_tty_driver_write, + .write_room = pti_tty_write_room, + .install = pti_tty_install, + .cleanup = pti_tty_cleanup +}; + +static const struct file_operations pti_char_driver_ops = { + .owner = THIS_MODULE, + .write = pti_char_write, + .open = pti_char_open, + .release = pti_char_release, +}; + +static struct miscdevice pti_char_driver = { + .minor = MISC_DYNAMIC_MINOR, + .name = CHARNAME, + .fops = &pti_char_driver_ops +}; + +/** + * pti_console_write()- Write to the console that has been acquired. + * + * @c: Not used in this implementaiton. + * @buf: Data to be written. + * @len: Length of buf. + */ +static void pti_console_write(struct console *c, const char *buf, unsigned len) +{ + static struct pti_masterchannel mc = {.master = CONSOLE_ID, + .channel = 0}; + + mc.channel = pti_console_channel; + pti_console_channel = (pti_console_channel + 1) & 0x7f; + + pti_write_full_frame_to_aperture(&mc, buf, len); +} + +/** + * pti_console_device()- Return the driver tty structure and set the + * associated index implementation. + * + * @c: Console device of the driver. + * @index: index associated with c. + * + * Returns: + * always value of pti_tty_driver structure when this function + * is called. + */ +static struct tty_driver *pti_console_device(struct console *c, int *index) +{ + *index = c->index; + return pti_tty_driver; +} + +/** + * pti_console_setup()- Initialize console variables used by the driver. + * + * @c: Not used. + * @opts: Not used. + * + * Returns: + * always 0. + */ +static int pti_console_setup(struct console *c, char *opts) +{ + pti_console_channel = 0; + pti_control_channel = 0; + return 0; +} + +/* + * pti_console struct, used to capture OS printk()'s and shift + * out to the PTI device for debugging. This cannot be + * enabled upon boot because of the possibility of eating + * any serial console printk's (race condition discovered). + * The console should be enabled upon when the tty port is + * used for the first time. Since the primary purpose for + * the tty port is to hook up syslog to it, the tty port + * will be open for a really long time. + */ +static struct console pti_console = { + .name = TTYNAME, + .write = pti_console_write, + .device = pti_console_device, + .setup = pti_console_setup, + .flags = CON_PRINTBUFFER, + .index = 0, +}; + +/** + * pti_port_activate()- Used to start/initialize any items upon + * first opening of tty_port(). + * + * @port- The tty port number of the PTI device. + * @tty- The tty struct associated with this device. + * + * Returns: + * always returns 0 + * + * Notes: The primary purpose of the PTI tty port 0 is to hook + * the syslog daemon to it; thus this port will be open for a + * very long time. + */ +static int pti_port_activate(struct tty_port *port, struct tty_struct *tty) +{ + if (port->tty->index == PTITTY_MINOR_START) + console_start(&pti_console); + return 0; +} + +/** + * pti_port_shutdown()- Used to stop/shutdown any items upon the + * last tty port close. + * + * @port- The tty port number of the PTI device. + * + * Notes: The primary purpose of the PTI tty port 0 is to hook + * the syslog daemon to it; thus this port will be open for a + * very long time. + */ +static void pti_port_shutdown(struct tty_port *port) +{ + if (port->tty->index == PTITTY_MINOR_START) + console_stop(&pti_console); +} + +static const struct tty_port_operations tty_port_ops = { + .activate = pti_port_activate, + .shutdown = pti_port_shutdown, +}; + +/* + * Note the _probe() call sets everything up and ties the char and tty + * to successfully detecting the PTI device on the pci bus. + */ + +/** + * pti_pci_probe()- Used to detect pti on the pci bus and set + * things up in the driver. + * + * @pdev- pci_dev struct values for pti. + * @ent- pci_device_id struct for pti driver. + * + * Returns: + * 0 for success + * otherwise, error + */ +static int __devinit pti_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + int retval = -EINVAL; + int pci_bar = 1; + + dev_dbg(&pdev->dev, "%s %s(%d): PTI PCI ID %04x:%04x\n", __FILE__, + __func__, __LINE__, pdev->vendor, pdev->device); + + retval = misc_register(&pti_char_driver); + if (retval) { + pr_err("%s(%d): CHAR registration failed of pti driver\n", + __func__, __LINE__); + pr_err("%s(%d): Error value returned: %d\n", + __func__, __LINE__, retval); + return retval; + } + + retval = pci_enable_device(pdev); + if (retval != 0) { + dev_err(&pdev->dev, + "%s: pci_enable_device() returned error %d\n", + __func__, retval); + return retval; + } + + drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL); + + if (drv_data == NULL) { + retval = -ENOMEM; + dev_err(&pdev->dev, + "%s(%d): kmalloc() returned NULL memory.\n", + __func__, __LINE__); + return retval; + } + drv_data->pti_addr = pci_resource_start(pdev, pci_bar); + + retval = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev)); + if (retval != 0) { + dev_err(&pdev->dev, + "%s(%d): pci_request_region() returned error %d\n", + __func__, __LINE__, retval); + kfree(drv_data); + return retval; + } + drv_data->aperture_base = drv_data->pti_addr+APERTURE_14; + drv_data->pti_ioaddr = + ioremap_nocache((u32)drv_data->aperture_base, + APERTURE_LEN); + if (!drv_data->pti_ioaddr) { + pci_release_region(pdev, pci_bar); + retval = -ENOMEM; + kfree(drv_data); + return retval; + } + + pci_set_drvdata(pdev, drv_data); + + tty_port_init(&drv_data->port); + drv_data->port.ops = &tty_port_ops; + + tty_register_device(pti_tty_driver, 0, &pdev->dev); + tty_register_device(pti_tty_driver, 1, &pdev->dev); + + register_console(&pti_console); + + return retval; +} + +static struct pci_driver pti_pci_driver = { + .name = PCINAME, + .id_table = pci_ids, + .probe = pti_pci_probe, + .remove = pti_pci_remove, +}; + +/** + * + * pti_init()- Overall entry/init call to the pti driver. + * It starts the registration process with the kernel. + * + * Returns: + * int __init, 0 for success + * otherwise value is an error + * + */ +static int __init pti_init(void) +{ + int retval = -EINVAL; + + /* First register module as tty device */ + + pti_tty_driver = alloc_tty_driver(1); + if (pti_tty_driver == NULL) { + pr_err("%s(%d): Memory allocation failed for ptiTTY driver\n", + __func__, __LINE__); + return -ENOMEM; + } + + pti_tty_driver->owner = THIS_MODULE; + pti_tty_driver->magic = TTY_DRIVER_MAGIC; + pti_tty_driver->driver_name = DRIVERNAME; + pti_tty_driver->name = TTYNAME; + pti_tty_driver->major = 0; + pti_tty_driver->minor_start = PTITTY_MINOR_START; + pti_tty_driver->minor_num = PTITTY_MINOR_NUM; + pti_tty_driver->num = PTITTY_MINOR_NUM; + pti_tty_driver->type = TTY_DRIVER_TYPE_SYSTEM; + pti_tty_driver->subtype = SYSTEM_TYPE_SYSCONS; + pti_tty_driver->flags = TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV; + pti_tty_driver->init_termios = tty_std_termios; + + tty_set_operations(pti_tty_driver, &pti_tty_driver_ops); + + retval = tty_register_driver(pti_tty_driver); + if (retval) { + pr_err("%s(%d): TTY registration failed of pti driver\n", + __func__, __LINE__); + pr_err("%s(%d): Error value returned: %d\n", + __func__, __LINE__, retval); + + pti_tty_driver = NULL; + return retval; + } + + retval = pci_register_driver(&pti_pci_driver); + + if (retval) { + pr_err("%s(%d): PCI registration failed of pti driver\n", + __func__, __LINE__); + pr_err("%s(%d): Error value returned: %d\n", + __func__, __LINE__, retval); + + tty_unregister_driver(pti_tty_driver); + pr_err("%s(%d): Unregistering TTY part of pti driver\n", + __func__, __LINE__); + pti_tty_driver = NULL; + return retval; + } + + return retval; +} + +/** + * pti_exit()- Unregisters this module as a tty and pci driver. + */ +static void __exit pti_exit(void) +{ + int retval; + + tty_unregister_device(pti_tty_driver, 0); + tty_unregister_device(pti_tty_driver, 1); + + retval = tty_unregister_driver(pti_tty_driver); + if (retval) { + pr_err("%s(%d): TTY unregistration failed of pti driver\n", + __func__, __LINE__); + pr_err("%s(%d): Error value returned: %d\n", + __func__, __LINE__, retval); + } + + pci_unregister_driver(&pti_pci_driver); + + retval = misc_deregister(&pti_char_driver); + if (retval) { + pr_err("%s(%d): CHAR unregistration failed of pti driver\n", + __func__, __LINE__); + pr_err("%s(%d): Error value returned: %d\n", + __func__, __LINE__, retval); + } + + unregister_console(&pti_console); + return; +} + +module_init(pti_init); +module_exit(pti_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ken Mills, Jay Freyensee"); +MODULE_DESCRIPTION("PTI Driver"); + diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c index f91f82eabda7..1a05fe08e2cb 100644 --- a/drivers/misc/ti-st/st_core.c +++ b/drivers/misc/ti-st/st_core.c @@ -747,8 +747,8 @@ static void st_tty_close(struct tty_struct *tty) pr_debug("%s: done ", __func__); } -static void st_tty_receive(struct tty_struct *tty, const unsigned char *data, - char *tty_flags, int count) +static unsigned int st_tty_receive(struct tty_struct *tty, + const unsigned char *data, char *tty_flags, int count) { #ifdef VERBOSE print_hex_dump(KERN_DEBUG, ">in>", DUMP_PREFIX_NONE, @@ -761,6 +761,8 @@ static void st_tty_receive(struct tty_struct *tty, const unsigned char *data, */ st_recv(tty->disc_data, data, count); pr_debug("done %s", __func__); + + return count; } /* wake-up function called in from the TTY layer diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c index 3df0c0f8b8bf..73c7e03617ec 100644 --- a/drivers/net/caif/caif_serial.c +++ b/drivers/net/caif/caif_serial.c @@ -167,8 +167,8 @@ static inline void debugfs_tx(struct ser_device *ser, const u8 *data, int size) #endif -static void ldisc_receive(struct tty_struct *tty, const u8 *data, - char *flags, int count) +static unsigned int ldisc_receive(struct tty_struct *tty, + const u8 *data, char *flags, int count) { struct sk_buff *skb = NULL; struct ser_device *ser; @@ -215,6 +215,8 @@ static void ldisc_receive(struct tty_struct *tty, const u8 *data, } else ++ser->dev->stats.rx_dropped; update_tty_status(ser); + + return count; } static int handle_tx(struct ser_device *ser) diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c index 1b49df6b2470..75622d54581f 100644 --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -425,16 +425,17 @@ static void slc_setup(struct net_device *dev) * in parallel */ -static void slcan_receive_buf(struct tty_struct *tty, +static unsigned int slcan_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *fp, int count) { struct slcan *sl = (struct slcan *) tty->disc_data; + int bytes = count; if (!sl || sl->magic != SLCAN_MAGIC || !netif_running(sl->dev)) - return; + return -ENODEV; /* Read the characters out of the buffer */ - while (count--) { + while (bytes--) { if (fp && *fp++) { if (!test_and_set_bit(SLF_ERROR, &sl->flags)) sl->dev->stats.rx_errors++; @@ -443,6 +444,8 @@ static void slcan_receive_buf(struct tty_struct *tty, } slcan_unesc(sl, *cp++); } + + return count; } /************************************ diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c index 3e5d0b6b6516..992089639ea4 100644 --- a/drivers/net/hamradio/6pack.c +++ b/drivers/net/hamradio/6pack.c @@ -456,7 +456,7 @@ out: * a block of 6pack data has been received, which can now be decapsulated * and sent on to some IP layer for further processing. */ -static void sixpack_receive_buf(struct tty_struct *tty, +static unsigned int sixpack_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *fp, int count) { struct sixpack *sp; @@ -464,11 +464,11 @@ static void sixpack_receive_buf(struct tty_struct *tty, int count1; if (!count) - return; + return 0; sp = sp_get(tty); if (!sp) - return; + return -ENODEV; memcpy(buf, cp, count < sizeof(buf) ? count : sizeof(buf)); @@ -487,6 +487,8 @@ static void sixpack_receive_buf(struct tty_struct *tty, sp_put(sp); tty_unthrottle(tty); + + return count1; } /* diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c index 4c628393c8b1..0e4f23531140 100644 --- a/drivers/net/hamradio/mkiss.c +++ b/drivers/net/hamradio/mkiss.c @@ -923,13 +923,14 @@ static long mkiss_compat_ioctl(struct tty_struct *tty, struct file *file, * a block of data has been received, which can now be decapsulated * and sent on to the AX.25 layer for further processing. */ -static void mkiss_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static unsigned int mkiss_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct mkiss *ax = mkiss_get(tty); + int bytes = count; if (!ax) - return; + return -ENODEV; /* * Argh! mtu change time! - costs us the packet part received @@ -939,7 +940,7 @@ static void mkiss_receive_buf(struct tty_struct *tty, const unsigned char *cp, ax_changedmtu(ax); /* Read the characters out of the buffer */ - while (count--) { + while (bytes--) { if (fp != NULL && *fp++) { if (!test_and_set_bit(AXF_ERROR, &ax->flags)) ax->dev->stats.rx_errors++; @@ -952,6 +953,8 @@ static void mkiss_receive_buf(struct tty_struct *tty, const unsigned char *cp, mkiss_put(ax); tty_unthrottle(tty); + + return count; } /* diff --git a/drivers/net/irda/irtty-sir.c b/drivers/net/irda/irtty-sir.c index 3352b2443e58..035861d8acb1 100644 --- a/drivers/net/irda/irtty-sir.c +++ b/drivers/net/irda/irtty-sir.c @@ -216,23 +216,23 @@ static int irtty_do_write(struct sir_dev *dev, const unsigned char *ptr, size_t * usbserial: urb-complete-interrupt / softint */ -static void irtty_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static unsigned int irtty_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct sir_dev *dev; struct sirtty_cb *priv = tty->disc_data; int i; - IRDA_ASSERT(priv != NULL, return;); - IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return;); + IRDA_ASSERT(priv != NULL, return -ENODEV;); + IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return -EINVAL;); if (unlikely(count==0)) /* yes, this happens */ - return; + return 0; dev = priv->dev; if (!dev) { IRDA_WARNING("%s(), not ready yet!\n", __func__); - return; + return -ENODEV; } for (i = 0; i < count; i++) { @@ -242,11 +242,13 @@ static void irtty_receive_buf(struct tty_struct *tty, const unsigned char *cp, if (fp && *fp++) { IRDA_DEBUG(0, "Framing or parity error!\n"); sirdev_receive(dev, NULL, 0); /* notify sir_dev (updating stats) */ - return; + return -EINVAL; } } sirdev_receive(dev, cp, count); + + return count; } /* diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c index a1b82c9c67d2..53872d7d7382 100644 --- a/drivers/net/ppp_async.c +++ b/drivers/net/ppp_async.c @@ -340,7 +340,7 @@ ppp_asynctty_poll(struct tty_struct *tty, struct file *file, poll_table *wait) } /* May sleep, don't call from interrupt level or with interrupts disabled */ -static void +static unsigned int ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf, char *cflags, int count) { @@ -348,7 +348,7 @@ ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf, unsigned long flags; if (!ap) - return; + return -ENODEV; spin_lock_irqsave(&ap->recv_lock, flags); ppp_async_input(ap, buf, cflags, count); spin_unlock_irqrestore(&ap->recv_lock, flags); @@ -356,6 +356,8 @@ ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf, tasklet_schedule(&ap->tsk); ap_put(ap); tty_unthrottle(tty); + + return count; } static void diff --git a/drivers/net/ppp_synctty.c b/drivers/net/ppp_synctty.c index 2573f525f11c..0815790a5cf9 100644 --- a/drivers/net/ppp_synctty.c +++ b/drivers/net/ppp_synctty.c @@ -381,7 +381,7 @@ ppp_sync_poll(struct tty_struct *tty, struct file *file, poll_table *wait) } /* May sleep, don't call from interrupt level or with interrupts disabled */ -static void +static unsigned int ppp_sync_receive(struct tty_struct *tty, const unsigned char *buf, char *cflags, int count) { @@ -389,7 +389,7 @@ ppp_sync_receive(struct tty_struct *tty, const unsigned char *buf, unsigned long flags; if (!ap) - return; + return -ENODEV; spin_lock_irqsave(&ap->recv_lock, flags); ppp_sync_input(ap, buf, cflags, count); spin_unlock_irqrestore(&ap->recv_lock, flags); @@ -397,6 +397,8 @@ ppp_sync_receive(struct tty_struct *tty, const unsigned char *buf, tasklet_schedule(&ap->tsk); sp_put(ap); tty_unthrottle(tty); + + return count; } static void diff --git a/drivers/net/slip.c b/drivers/net/slip.c index 8ec1a9a0bb9a..584809c656d5 100644 --- a/drivers/net/slip.c +++ b/drivers/net/slip.c @@ -670,16 +670,17 @@ static void sl_setup(struct net_device *dev) * in parallel */ -static void slip_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static unsigned int slip_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct slip *sl = tty->disc_data; + int bytes = count; if (!sl || sl->magic != SLIP_MAGIC || !netif_running(sl->dev)) - return; + return -ENODEV; /* Read the characters out of the buffer */ - while (count--) { + while (bytes--) { if (fp && *fp++) { if (!test_and_set_bit(SLF_ERROR, &sl->flags)) sl->dev->stats.rx_errors++; @@ -693,6 +694,8 @@ static void slip_receive_buf(struct tty_struct *tty, const unsigned char *cp, #endif slip_unesc(sl, *cp++); } + + return count; } /************************************ diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c index 24297b274cd4..40398bf7d036 100644 --- a/drivers/net/wan/x25_asy.c +++ b/drivers/net/wan/x25_asy.c @@ -517,17 +517,18 @@ static int x25_asy_close(struct net_device *dev) * and sent on to some IP layer for further processing. */ -static void x25_asy_receive_buf(struct tty_struct *tty, +static unsigned int x25_asy_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *fp, int count) { struct x25_asy *sl = tty->disc_data; + int bytes = count; if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev)) return; /* Read the characters out of the buffer */ - while (count--) { + while (bytes--) { if (fp && *fp++) { if (!test_and_set_bit(SLF_ERROR, &sl->flags)) sl->dev->stats.rx_errors++; @@ -536,6 +537,8 @@ static void x25_asy_receive_buf(struct tty_struct *tty, } x25_asy_unesc(sl, *cp++); } + + return count; } /* diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index bc8ce48f0778..f330338c2f22 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -1621,7 +1621,7 @@ static void __devinit detect_and_report_it87(void) u8 origval, r; if (verbose_probing) printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n"); - if (!request_region(0x2e, 2, __func__)) + if (!request_muxed_region(0x2e, 2, __func__)) return; origval = inb(0x2e); /* Save original value */ outb(0x87, 0x2e); diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 3fd7199301b6..bd7cc0527999 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -319,3 +319,34 @@ config N_GSM This line discipline provides support for the GSM MUX protocol and presents the mux as a set of 61 individual tty devices. +config TRACE_ROUTER + tristate "Trace data router for MIPI P1149.7 cJTAG standard" + depends on TRACE_SINK + default n + help + The trace router uses the Linux tty line discipline framework to + route trace data coming from a tty port (say UART for example) to + the trace sink line discipline driver and to another tty port (say + USB). This is part of a solution for the MIPI P1149.7, compact JTAG, + standard, which is for debugging mobile devices. The PTI driver in + drivers/misc/pti.c defines the majority of this MIPI solution. + + You should select this driver if the target kernel is meant for + a mobile device containing a modem. Then you will need to select + "Trace data sink for MIPI P1149.7 cJTAG standard" line discipline + driver. + +config TRACE_SINK + tristate "Trace data sink for MIPI P1149.7 cJTAG standard" + default n + help + The trace sink uses the Linux line discipline framework to receive + trace data coming from the trace router line discipline driver + to a user-defined tty port target, like USB. + This is to provide a way to extract modem trace data on + devices that do not have a PTI HW module, or just need modem + trace data to come out of a different HW output port. + This is part of a solution for the P1149.7, compact JTAG, standard. + + If you select this option, you need to select + "Trace data router for MIPI P1149.7 cJTAG standard". diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile index 690522fcb338..ea89b0bd15fe 100644 --- a/drivers/tty/Makefile +++ b/drivers/tty/Makefile @@ -6,6 +6,8 @@ obj-$(CONFIG_AUDIT) += tty_audit.o obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o obj-$(CONFIG_N_HDLC) += n_hdlc.o obj-$(CONFIG_N_GSM) += n_gsm.o +obj-$(CONFIG_TRACE_ROUTER) += n_tracerouter.o +obj-$(CONFIG_TRACE_SINK) += n_tracesink.o obj-$(CONFIG_R3964) += n_r3964.o obj-y += vt/ diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index f214e5022472..220579592c20 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/amiserial.c - * * Serial driver for the amiga builtin port. * * This code was created by taking serial.c version 4.30 from kernel diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index c99728f0cd9f..bfa05e801823 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -3,8 +3,6 @@ #undef Z_EXT_CHARS_IN_BUFFER /* - * linux/drivers/char/cyclades.c - * * This file contains the driver for the Cyclades async multiport * serial boards. * @@ -1445,13 +1443,11 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty) { struct cyclades_card *card; unsigned long flags; - int channel; if (!(info->port.flags & ASYNC_INITIALIZED)) return; card = info->card; - channel = info->line - card->first_line; if (!cy_is_Z(card)) { spin_lock_irqsave(&card->card_lock, flags); @@ -1476,6 +1472,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty) spin_unlock_irqrestore(&card->card_lock, flags); } else { #ifdef CY_DEBUG_OPEN + int channel = info->line - card->first_line; printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, " "base_addr %p\n", card, channel, card->base_addr); #endif diff --git a/drivers/tty/ipwireless/Makefile b/drivers/tty/ipwireless/Makefile index db80873d7f20..fe2e1730986b 100644 --- a/drivers/tty/ipwireless/Makefile +++ b/drivers/tty/ipwireless/Makefile @@ -1,6 +1,4 @@ # -# drivers/char/pcmcia/ipwireless/Makefile -# # Makefile for the IPWireless driver # diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 35b0c38590e6..ba679ce0a774 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -371,7 +371,7 @@ static int moxa_ioctl(struct tty_struct *tty, tmp.cflag = p->cflag; else tmp.cflag = ttyp->termios->c_cflag; - tty_kref_put(tty); + tty_kref_put(ttyp); copy: if (copy_to_user(argm, &tmp, sizeof(tmp))) return -EFAULT; @@ -1129,7 +1129,6 @@ static void moxa_shutdown(struct tty_port *port) struct moxa_port *ch = container_of(port, struct moxa_port, port); MoxaPortDisable(ch); MoxaPortFlushData(ch, 2); - clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); } static int moxa_carrier_raised(struct tty_port *port) @@ -1155,7 +1154,6 @@ static int moxa_open(struct tty_struct *tty, struct file *filp) struct moxa_board_conf *brd; struct moxa_port *ch; int port; - int retval; port = tty->index; if (port == MAX_PORTS) { @@ -1190,10 +1188,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp) mutex_unlock(&ch->port.mutex); mutex_unlock(&moxa_openlock); - retval = tty_port_block_til_ready(&ch->port, tty, filp); - if (retval == 0) - set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags); - return retval; + return tty_port_block_til_ready(&ch->port, tty, filp); } static void moxa_close(struct tty_struct *tty, struct file *filp) @@ -1207,14 +1202,15 @@ static int moxa_write(struct tty_struct *tty, const unsigned char *buf, int count) { struct moxa_port *ch = tty->driver_data; + unsigned long flags; int len; if (ch == NULL) return 0; - spin_lock_bh(&moxa_lock); + spin_lock_irqsave(&moxa_lock, flags); len = MoxaPortWriteData(tty, buf, count); - spin_unlock_bh(&moxa_lock); + spin_unlock_irqrestore(&moxa_lock, flags); set_bit(LOWWAIT, &ch->statusflags); return len; @@ -1281,10 +1277,8 @@ static int moxa_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { struct moxa_port *ch; - int port; int dtr, rts; - port = tty->index; mutex_lock(&moxa_openlock); ch = tty->driver_data; if (!ch) { @@ -1756,11 +1750,9 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, speed_t baud) { void __iomem *ofsAddr; - tcflag_t cflag; tcflag_t mode = 0; ofsAddr = port->tableAddr; - cflag = termio->c_cflag; /* termio->c_cflag */ mode = termio->c_cflag & CSIZE; if (mode == CS5) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 77623b936538..a4c42a75a3bf 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -526,19 +526,6 @@ static int gsm_stuff_frame(const u8 *input, u8 *output, int len) return olen; } -static void hex_packet(const unsigned char *p, int len) -{ - int i; - for (i = 0; i < len; i++) { - if (i && (i % 16) == 0) { - pr_cont("\n"); - pr_debug(""); - } - pr_cont("%02X ", *p++); - } - pr_cont("\n"); -} - /** * gsm_send - send a control frame * @gsm: our GSM mux @@ -685,10 +672,10 @@ static void gsm_data_kick(struct gsm_mux *gsm) len = msg->len + 2; } - if (debug & 4) { - pr_debug("gsm_data_kick:\n"); - hex_packet(gsm->txframe, len); - } + if (debug & 4) + print_hex_dump_bytes("gsm_data_kick: ", + DUMP_PREFIX_OFFSET, + gsm->txframe, len); if (gsm->output(gsm, gsm->txframe + skip_sof, len - skip_sof) < 0) @@ -2095,10 +2082,9 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len) set_bit(TTY_DO_WRITE_WAKEUP, &gsm->tty->flags); return -ENOSPC; } - if (debug & 4) { - pr_debug("-->%d bytes out\n", len); - hex_packet(data, len); - } + if (debug & 4) + print_hex_dump_bytes("gsmld_output: ", DUMP_PREFIX_OFFSET, + data, len); gsm->tty->ops->write(gsm->tty, data, len); return len; } @@ -2142,8 +2128,8 @@ static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) gsm->tty = NULL; } -static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static unsigned int gsmld_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct gsm_mux *gsm = tty->disc_data; const unsigned char *dp; @@ -2152,10 +2138,9 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, char buf[64]; char flags; - if (debug & 4) { - pr_debug("Inbytes %dd\n", count); - hex_packet(cp, count); - } + if (debug & 4) + print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET, + cp, count); for (i = count, dp = cp, f = fp; i; i--, dp++) { flags = *f++; @@ -2177,6 +2162,8 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, } /* FASYNC if needed ? */ /* If clogged call tty_throttle(tty); */ + + return count; } /** diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c index cea56033b34c..cac666314aef 100644 --- a/drivers/tty/n_hdlc.c +++ b/drivers/tty/n_hdlc.c @@ -188,8 +188,8 @@ static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, poll_table *wait); static int n_hdlc_tty_open(struct tty_struct *tty); static void n_hdlc_tty_close(struct tty_struct *tty); -static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *cp, - char *fp, int count); +static unsigned int n_hdlc_tty_receive(struct tty_struct *tty, + const __u8 *cp, char *fp, int count); static void n_hdlc_tty_wakeup(struct tty_struct *tty); #define bset(p,b) ((p)[(b) >> 5] |= (1 << ((b) & 0x1f))) @@ -509,8 +509,8 @@ static void n_hdlc_tty_wakeup(struct tty_struct *tty) * Called by tty low level driver when receive data is available. Data is * interpreted as one HDLC frame. */ -static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data, - char *flags, int count) +static unsigned int n_hdlc_tty_receive(struct tty_struct *tty, + const __u8 *data, char *flags, int count) { register struct n_hdlc *n_hdlc = tty2n_hdlc (tty); register struct n_hdlc_buf *buf; @@ -521,20 +521,20 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data, /* This can happen if stuff comes in on the backup tty */ if (!n_hdlc || tty != n_hdlc->tty) - return; + return -ENODEV; /* verify line is using HDLC discipline */ if (n_hdlc->magic != HDLC_MAGIC) { printk("%s(%d) line not using HDLC discipline\n", __FILE__,__LINE__); - return; + return -EINVAL; } if ( count>maxframe ) { if (debuglevel >= DEBUG_LEVEL_INFO) printk("%s(%d) rx count>maxframesize, data discarded\n", __FILE__,__LINE__); - return; + return -EINVAL; } /* get a free HDLC buffer */ @@ -550,7 +550,7 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data, if (debuglevel >= DEBUG_LEVEL_INFO) printk("%s(%d) no more rx buffers, data discarded\n", __FILE__,__LINE__); - return; + return -EINVAL; } /* copy received data to HDLC buffer */ @@ -565,6 +565,8 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data, if (n_hdlc->tty->fasync != NULL) kill_fasync (&n_hdlc->tty->fasync, SIGIO, POLL_IN); + return count; + } /* end of n_hdlc_tty_receive() */ /** diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 5c6c31459a2f..a4bc39c21a43 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -139,8 +139,8 @@ static int r3964_ioctl(struct tty_struct *tty, struct file *file, static void r3964_set_termios(struct tty_struct *tty, struct ktermios *old); static unsigned int r3964_poll(struct tty_struct *tty, struct file *file, struct poll_table_struct *wait); -static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count); +static unsigned int r3964_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count); static struct tty_ldisc_ops tty_ldisc_N_R3964 = { .owner = THIS_MODULE, @@ -1239,8 +1239,8 @@ static unsigned int r3964_poll(struct tty_struct *tty, struct file *file, return result; } -static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static unsigned int r3964_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct r3964_info *pInfo = tty->disc_data; const unsigned char *p; @@ -1257,6 +1257,8 @@ static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp, } } + + return count; } MODULE_LICENSE("GPL"); diff --git a/drivers/tty/n_tracerouter.c b/drivers/tty/n_tracerouter.c new file mode 100644 index 000000000000..1f063d3aa32f --- /dev/null +++ b/drivers/tty/n_tracerouter.c @@ -0,0 +1,243 @@ +/* + * n_tracerouter.c - Trace data router through tty space + * + * Copyright (C) Intel 2011 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This trace router uses the Linux line discipline framework to route + * trace data coming from a HW Modem to a PTI (Parallel Trace Module) port. + * The solution is not specific to a HW modem and this line disciple can + * be used to route any stream of data in kernel space. + * This is part of a solution for the P1149.7, compact JTAG, standard. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/ioctl.h> +#include <linux/tty.h> +#include <linux/tty_ldisc.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <asm-generic/bug.h> +#include "n_tracesink.h" + +/* + * Other ldisc drivers use 65536 which basically means, + * 'I can always accept 64k' and flow control is off. + * This number is deemed appropriate for this driver. + */ +#define RECEIVE_ROOM 65536 +#define DRIVERNAME "n_tracerouter" + +/* + * struct to hold private configuration data for this ldisc. + * opencalled is used to hold if this ldisc has been opened. + * kref_tty holds the tty reference the ldisc sits on top of. + */ +struct tracerouter_data { + u8 opencalled; + struct tty_struct *kref_tty; +}; +static struct tracerouter_data *tr_data; + +/* lock for when tty reference is being used */ +static DEFINE_MUTEX(routelock); + +/** + * n_tracerouter_open() - Called when a tty is opened by a SW entity. + * @tty: terminal device to the ldisc. + * + * Return: + * 0 for success. + * + * Caveats: This should only be opened one time per SW entity. + */ +static int n_tracerouter_open(struct tty_struct *tty) +{ + int retval = -EEXIST; + + mutex_lock(&routelock); + if (tr_data->opencalled == 0) { + + tr_data->kref_tty = tty_kref_get(tty); + if (tr_data->kref_tty == NULL) { + retval = -EFAULT; + } else { + tr_data->opencalled = 1; + tty->disc_data = tr_data; + tty->receive_room = RECEIVE_ROOM; + tty_driver_flush_buffer(tty); + retval = 0; + } + } + mutex_unlock(&routelock); + return retval; +} + +/** + * n_tracerouter_close() - close connection + * @tty: terminal device to the ldisc. + * + * Called when a software entity wants to close a connection. + */ +static void n_tracerouter_close(struct tty_struct *tty) +{ + struct tracerouter_data *tptr = tty->disc_data; + + mutex_lock(&routelock); + WARN_ON(tptr->kref_tty != tr_data->kref_tty); + tty_driver_flush_buffer(tty); + tty_kref_put(tr_data->kref_tty); + tr_data->kref_tty = NULL; + tr_data->opencalled = 0; + tty->disc_data = NULL; + mutex_unlock(&routelock); +} + +/** + * n_tracerouter_read() - read request from user space + * @tty: terminal device passed into the ldisc. + * @file: pointer to open file object. + * @buf: pointer to the data buffer that gets eventually returned. + * @nr: number of bytes of the data buffer that is returned. + * + * function that allows read() functionality in userspace. By default if this + * is not implemented it returns -EIO. This module is functioning like a + * router via n_tracerouter_receivebuf(), and there is no real requirement + * to implement this function. However, an error return value other than + * -EIO should be used just to show that there was an intent not to have + * this function implemented. Return value based on read() man pages. + * + * Return: + * -EINVAL + */ +static ssize_t n_tracerouter_read(struct tty_struct *tty, struct file *file, + unsigned char __user *buf, size_t nr) { + return -EINVAL; +} + +/** + * n_tracerouter_write() - Function that allows write() in userspace. + * @tty: terminal device passed into the ldisc. + * @file: pointer to open file object. + * @buf: pointer to the data buffer that gets eventually returned. + * @nr: number of bytes of the data buffer that is returned. + * + * By default if this is not implemented, it returns -EIO. + * This should not be implemented, ever, because + * 1. this driver is functioning like a router via + * n_tracerouter_receivebuf() + * 2. No writes to HW will ever go through this line discpline driver. + * However, an error return value other than -EIO should be used + * just to show that there was an intent not to have this function + * implemented. Return value based on write() man pages. + * + * Return: + * -EINVAL + */ +static ssize_t n_tracerouter_write(struct tty_struct *tty, struct file *file, + const unsigned char *buf, size_t nr) { + return -EINVAL; +} + +/** + * n_tracerouter_receivebuf() - Routing function for driver. + * @tty: terminal device passed into the ldisc. It's assumed + * tty will never be NULL. + * @cp: buffer, block of characters to be eventually read by + * someone, somewhere (user read() call or some kernel function). + * @fp: flag buffer. + * @count: number of characters (aka, bytes) in cp. + * + * This function takes the input buffer, cp, and passes it to + * an external API function for processing. + */ +static void n_tracerouter_receivebuf(struct tty_struct *tty, + const unsigned char *cp, + char *fp, int count) +{ + mutex_lock(&routelock); + n_tracesink_datadrain((u8 *) cp, count); + mutex_unlock(&routelock); +} + +/* + * Flush buffer is not impelemented as the ldisc has no internal buffering + * so the tty_driver_flush_buffer() is sufficient for this driver's needs. + */ + +static struct tty_ldisc_ops tty_ptirouter_ldisc = { + .owner = THIS_MODULE, + .magic = TTY_LDISC_MAGIC, + .name = DRIVERNAME, + .open = n_tracerouter_open, + .close = n_tracerouter_close, + .read = n_tracerouter_read, + .write = n_tracerouter_write, + .receive_buf = n_tracerouter_receivebuf +}; + +/** + * n_tracerouter_init - module initialisation + * + * Registers this module as a line discipline driver. + * + * Return: + * 0 for success, any other value error. + */ +static int __init n_tracerouter_init(void) +{ + int retval; + + tr_data = kzalloc(sizeof(struct tracerouter_data), GFP_KERNEL); + if (tr_data == NULL) + return -ENOMEM; + + + /* Note N_TRACEROUTER is defined in linux/tty.h */ + retval = tty_register_ldisc(N_TRACEROUTER, &tty_ptirouter_ldisc); + if (retval < 0) { + pr_err("%s: Registration failed: %d\n", __func__, retval); + kfree(tr_data); + } + return retval; +} + +/** + * n_tracerouter_exit - module unload + * + * Removes this module as a line discipline driver. + */ +static void __exit n_tracerouter_exit(void) +{ + int retval = tty_unregister_ldisc(N_TRACEROUTER); + + if (retval < 0) + pr_err("%s: Unregistration failed: %d\n", __func__, retval); + else + kfree(tr_data); +} + +module_init(n_tracerouter_init); +module_exit(n_tracerouter_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jay Freyensee"); +MODULE_ALIAS_LDISC(N_TRACEROUTER); +MODULE_DESCRIPTION("Trace router ldisc driver"); diff --git a/drivers/tty/n_tracesink.c b/drivers/tty/n_tracesink.c new file mode 100644 index 000000000000..ddce58b973d2 --- /dev/null +++ b/drivers/tty/n_tracesink.c @@ -0,0 +1,238 @@ +/* + * n_tracesink.c - Trace data router and sink path through tty space. + * + * Copyright (C) Intel 2011 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * The trace sink uses the Linux line discipline framework to receive + * trace data coming from the PTI source line discipline driver + * to a user-desired tty port, like USB. + * This is to provide a way to extract modem trace data on + * devices that do not have a PTI HW module, or just need modem + * trace data to come out of a different HW output port. + * This is part of a solution for the P1149.7, compact JTAG, standard. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/ioctl.h> +#include <linux/tty.h> +#include <linux/tty_ldisc.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <asm-generic/bug.h> +#include "n_tracesink.h" + +/* + * Other ldisc drivers use 65536 which basically means, + * 'I can always accept 64k' and flow control is off. + * This number is deemed appropriate for this driver. + */ +#define RECEIVE_ROOM 65536 +#define DRIVERNAME "n_tracesink" + +/* + * there is a quirk with this ldisc is he can write data + * to a tty from anyone calling his kernel API, which + * meets customer requirements in the drivers/misc/pti.c + * project. So he needs to know when he can and cannot write when + * the API is called. In theory, the API can be called + * after an init() but before a successful open() which + * would crash the system if tty is not checked. + */ +static struct tty_struct *this_tty; +static DEFINE_MUTEX(writelock); + +/** + * n_tracesink_open() - Called when a tty is opened by a SW entity. + * @tty: terminal device to the ldisc. + * + * Return: + * 0 for success, + * -EFAULT = couldn't get a tty kref n_tracesink will sit + * on top of + * -EEXIST = open() called successfully once and it cannot + * be called again. + * + * Caveats: open() should only be successful the first time a + * SW entity calls it. + */ +static int n_tracesink_open(struct tty_struct *tty) +{ + int retval = -EEXIST; + + mutex_lock(&writelock); + if (this_tty == NULL) { + this_tty = tty_kref_get(tty); + if (this_tty == NULL) { + retval = -EFAULT; + } else { + tty->disc_data = this_tty; + tty_driver_flush_buffer(tty); + retval = 0; + } + } + mutex_unlock(&writelock); + + return retval; +} + +/** + * n_tracesink_close() - close connection + * @tty: terminal device to the ldisc. + * + * Called when a software entity wants to close a connection. + */ +static void n_tracesink_close(struct tty_struct *tty) +{ + mutex_lock(&writelock); + tty_driver_flush_buffer(tty); + tty_kref_put(this_tty); + this_tty = NULL; + tty->disc_data = NULL; + mutex_unlock(&writelock); +} + +/** + * n_tracesink_read() - read request from user space + * @tty: terminal device passed into the ldisc. + * @file: pointer to open file object. + * @buf: pointer to the data buffer that gets eventually returned. + * @nr: number of bytes of the data buffer that is returned. + * + * function that allows read() functionality in userspace. By default if this + * is not implemented it returns -EIO. This module is functioning like a + * router via n_tracesink_receivebuf(), and there is no real requirement + * to implement this function. However, an error return value other than + * -EIO should be used just to show that there was an intent not to have + * this function implemented. Return value based on read() man pages. + * + * Return: + * -EINVAL + */ +static ssize_t n_tracesink_read(struct tty_struct *tty, struct file *file, + unsigned char __user *buf, size_t nr) { + return -EINVAL; +} + +/** + * n_tracesink_write() - Function that allows write() in userspace. + * @tty: terminal device passed into the ldisc. + * @file: pointer to open file object. + * @buf: pointer to the data buffer that gets eventually returned. + * @nr: number of bytes of the data buffer that is returned. + * + * By default if this is not implemented, it returns -EIO. + * This should not be implemented, ever, because + * 1. this driver is functioning like a router via + * n_tracesink_receivebuf() + * 2. No writes to HW will ever go through this line discpline driver. + * However, an error return value other than -EIO should be used + * just to show that there was an intent not to have this function + * implemented. Return value based on write() man pages. + * + * Return: + * -EINVAL + */ +static ssize_t n_tracesink_write(struct tty_struct *tty, struct file *file, + const unsigned char *buf, size_t nr) { + return -EINVAL; +} + +/** + * n_tracesink_datadrain() - Kernel API function used to route + * trace debugging data to user-defined + * port like USB. + * + * @buf: Trace debuging data buffer to write to tty target + * port. Null value will return with no write occurring. + * @count: Size of buf. Value of 0 or a negative number will + * return with no write occuring. + * + * Caveat: If this line discipline does not set the tty it sits + * on top of via an open() call, this API function will not + * call the tty's write() call because it will have no pointer + * to call the write(). + */ +void n_tracesink_datadrain(u8 *buf, int count) +{ + mutex_lock(&writelock); + + if ((buf != NULL) && (count > 0) && (this_tty != NULL)) + this_tty->ops->write(this_tty, buf, count); + + mutex_unlock(&writelock); +} +EXPORT_SYMBOL_GPL(n_tracesink_datadrain); + +/* + * Flush buffer is not impelemented as the ldisc has no internal buffering + * so the tty_driver_flush_buffer() is sufficient for this driver's needs. + */ + +/* + * tty_ldisc function operations for this driver. + */ +static struct tty_ldisc_ops tty_n_tracesink = { + .owner = THIS_MODULE, + .magic = TTY_LDISC_MAGIC, + .name = DRIVERNAME, + .open = n_tracesink_open, + .close = n_tracesink_close, + .read = n_tracesink_read, + .write = n_tracesink_write +}; + +/** + * n_tracesink_init- module initialisation + * + * Registers this module as a line discipline driver. + * + * Return: + * 0 for success, any other value error. + */ +static int __init n_tracesink_init(void) +{ + /* Note N_TRACESINK is defined in linux/tty.h */ + int retval = tty_register_ldisc(N_TRACESINK, &tty_n_tracesink); + + if (retval < 0) + pr_err("%s: Registration failed: %d\n", __func__, retval); + + return retval; +} + +/** + * n_tracesink_exit - module unload + * + * Removes this module as a line discipline driver. + */ +static void __exit n_tracesink_exit(void) +{ + int retval = tty_unregister_ldisc(N_TRACESINK); + + if (retval < 0) + pr_err("%s: Unregistration failed: %d\n", __func__, retval); +} + +module_init(n_tracesink_init); +module_exit(n_tracesink_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jay Freyensee"); +MODULE_ALIAS_LDISC(N_TRACESINK); +MODULE_DESCRIPTION("Trace sink ldisc driver"); diff --git a/drivers/tty/n_tracesink.h b/drivers/tty/n_tracesink.h new file mode 100644 index 000000000000..a68bb44f1ef5 --- /dev/null +++ b/drivers/tty/n_tracesink.h @@ -0,0 +1,36 @@ +/* + * n_tracesink.h - Kernel driver API to route trace data in kernel space. + * + * Copyright (C) Intel 2011 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * The PTI (Parallel Trace Interface) driver directs trace data routed from + * various parts in the system out through the Intel Penwell PTI port and + * out of the mobile device for analysis with a debugging tool + * (Lauterbach, Fido). This is part of a solution for the MIPI P1149.7, + * compact JTAG, standard. + * + * This header file is used by n_tracerouter to be able to send the + * data of it's tty port to the tty port this module sits. This + * mechanism can also be used independent of the PTI module. + * + */ + +#ifndef N_TRACESINK_H_ +#define N_TRACESINK_H_ + +void n_tracesink_datadrain(u8 *buf, int count); + +#endif diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 0ad32888091c..95d0a9c2dd13 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -81,38 +81,6 @@ static inline int tty_put_user(struct tty_struct *tty, unsigned char x, return put_user(x, ptr); } -/** - * n_tty_set__room - receive space - * @tty: terminal - * - * Called by the driver to find out how much data it is - * permitted to feed to the line discipline without any being lost - * and thus to manage flow control. Not serialized. Answers for the - * "instant". - */ - -static void n_tty_set_room(struct tty_struct *tty) -{ - /* tty->read_cnt is not read locked ? */ - int left = N_TTY_BUF_SIZE - tty->read_cnt - 1; - int old_left; - - /* - * If we are doing input canonicalization, and there are no - * pending newlines, let characters through without limit, so - * that erase characters will be handled. Other excess - * characters will be beeped. - */ - if (left <= 0) - left = tty->icanon && !tty->canon_data; - old_left = tty->receive_room; - tty->receive_room = left; - - /* Did this open up the receive buffer? We may need to flip */ - if (left && !old_left) - schedule_work(&tty->buf.work); -} - static void put_tty_queue_nolock(unsigned char c, struct tty_struct *tty) { if (tty->read_cnt < N_TTY_BUF_SIZE) { @@ -184,7 +152,6 @@ static void reset_buffer_flags(struct tty_struct *tty) tty->canon_head = tty->canon_data = tty->erasing = 0; memset(&tty->read_flags, 0, sizeof tty->read_flags); - n_tty_set_room(tty); check_unthrottle(tty); } @@ -1360,17 +1327,19 @@ static void n_tty_write_wakeup(struct tty_struct *tty) * calls one at a time and in order (or using flush_to_ldisc) */ -static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static unsigned int n_tty_receive_buf(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { const unsigned char *p; char *f, flags = TTY_NORMAL; int i; char buf[64]; unsigned long cpuflags; + int left; + int ret = 0; if (!tty->read_buf) - return; + return 0; if (tty->real_raw) { spin_lock_irqsave(&tty->read_lock, cpuflags); @@ -1380,6 +1349,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, memcpy(tty->read_buf + tty->read_head, cp, i); tty->read_head = (tty->read_head + i) & (N_TTY_BUF_SIZE-1); tty->read_cnt += i; + ret += i; cp += i; count -= i; @@ -1389,8 +1359,10 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, memcpy(tty->read_buf + tty->read_head, cp, i); tty->read_head = (tty->read_head + i) & (N_TTY_BUF_SIZE-1); tty->read_cnt += i; + ret += i; spin_unlock_irqrestore(&tty->read_lock, cpuflags); } else { + ret = count; for (i = count, p = cp, f = fp; i; i--, p++) { if (f) flags = *f++; @@ -1418,8 +1390,6 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, tty->ops->flush_chars(tty); } - n_tty_set_room(tty); - if ((!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) || L_EXTPROC(tty)) { kill_fasync(&tty->fasync, SIGIO, POLL_IN); @@ -1432,8 +1402,12 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, * mode. We don't want to throttle the driver if we're in * canonical mode and don't have a newline yet! */ - if (tty->receive_room < TTY_THRESHOLD_THROTTLE) + left = N_TTY_BUF_SIZE - tty->read_cnt - 1; + + if (left < TTY_THRESHOLD_THROTTLE) tty_throttle(tty); + + return ret; } int is_ignored(int sig) @@ -1477,7 +1451,6 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) if (test_bit(TTY_HW_COOK_IN, &tty->flags)) { tty->raw = 1; tty->real_raw = 1; - n_tty_set_room(tty); return; } if (I_ISTRIP(tty) || I_IUCLC(tty) || I_IGNCR(tty) || @@ -1530,7 +1503,6 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) else tty->real_raw = 0; } - n_tty_set_room(tty); /* The termios change make the tty ready for I/O */ wake_up_interruptible(&tty->write_wait); wake_up_interruptible(&tty->read_wait); @@ -1812,8 +1784,6 @@ do_it_again: retval = -ERESTARTSYS; break; } - /* FIXME: does n_tty_set_room need locking ? */ - n_tty_set_room(tty); timeout = schedule_timeout(timeout); continue; } @@ -1885,10 +1855,8 @@ do_it_again: * longer than TTY_THRESHOLD_UNTHROTTLE in canonical mode, * we won't get any more characters. */ - if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE) { - n_tty_set_room(tty); + if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE) check_unthrottle(tty); - } if (b - buf >= minimum) break; @@ -1910,7 +1878,6 @@ do_it_again: } else if (test_and_clear_bit(TTY_PUSH, &tty->flags)) goto do_it_again; - n_tty_set_room(tty); return retval; } diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c index fd0a98524d51..b1aecc7bb32a 100644 --- a/drivers/tty/nozomi.c +++ b/drivers/tty/nozomi.c @@ -364,8 +364,6 @@ struct port { u8 toggle_ul; u16 token_dl; - /* mutex to ensure one access patch to this port */ - struct mutex tty_sem; wait_queue_head_t tty_wait; struct async_icount tty_icount; @@ -1431,8 +1429,8 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, } for (i = PORT_MDM; i < MAX_PORT; i++) { - if (kfifo_alloc(&dc->port[i].fifo_ul, - FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) { + if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL, + GFP_KERNEL)) { dev_err(&pdev->dev, "Could not allocate kfifo buffer\n"); ret = -ENOMEM; @@ -1474,7 +1472,6 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, struct device *tty_dev; struct port *port = &dc->port[i]; port->dc = dc; - mutex_init(&port->tty_sem); tty_port_init(&port->port); port->port.ops = &noz_tty_port_ops; tty_dev = tty_register_device(ntty_driver, dc->index_start + i, @@ -1688,13 +1685,6 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, if (!dc || !port) return -ENODEV; - mutex_lock(&port->tty_sem); - - if (unlikely(!port->port.count)) { - DBG1(" "); - goto exit; - } - rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count); /* notify card */ @@ -1719,7 +1709,6 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, spin_unlock_irqrestore(&dc->spin_mutex, flags); exit: - mutex_unlock(&port->tty_sem); return rval; } @@ -1738,12 +1727,9 @@ static int ntty_write_room(struct tty_struct *tty) int room = 4096; const struct nozomi *dc = get_dc_by_tty(tty); - if (dc) { - mutex_lock(&port->tty_sem); - if (port->port.count) - room = kfifo_avail(&port->fifo_ul); - mutex_unlock(&port->tty_sem); - } + if (dc) + room = kfifo_avail(&port->fifo_ul); + return room; } @@ -1889,11 +1875,6 @@ static s32 ntty_chars_in_buffer(struct tty_struct *tty) goto exit_in_buffer; } - if (unlikely(!port->port.count)) { - dev_err(&dc->pdev->dev, "No tty open?\n"); - goto exit_in_buffer; - } - rval = kfifo_len(&port->fifo_ul); exit_in_buffer: diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 210774726add..98b6e3bdb000 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/pty.c - * * Copyright (C) 1991, 1992 Linus Torvalds * * Added support for a Unix98-style ptmx device. @@ -295,8 +293,8 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) return -ENOMEM; if (!try_module_get(driver->other->owner)) { /* This cannot in fact currently happen */ - free_tty_struct(o_tty); - return -ENOMEM; + retval = -ENOMEM; + goto err_free_tty; } initialize_tty_struct(o_tty, driver->other, idx); @@ -304,13 +302,11 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) the easy way .. */ retval = tty_init_termios(tty); if (retval) - goto free_mem_out; + goto err_deinit_tty; retval = tty_init_termios(o_tty); - if (retval) { - tty_free_termios(tty); - goto free_mem_out; - } + if (retval) + goto err_free_termios; /* * Everything allocated ... set up the o_tty structure. @@ -327,10 +323,14 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) tty->count++; driver->ttys[idx] = tty; return 0; -free_mem_out: +err_free_termios: + tty_free_termios(tty); +err_deinit_tty: + deinitialize_tty_struct(o_tty); module_put(o_tty->driver->owner); +err_free_tty: free_tty_struct(o_tty); - return -ENOMEM; + return retval; } static int pty_bsd_ioctl(struct tty_struct *tty, @@ -559,20 +559,19 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty) return -ENOMEM; if (!try_module_get(driver->other->owner)) { /* This cannot in fact currently happen */ - free_tty_struct(o_tty); - return -ENOMEM; + goto err_free_tty; } initialize_tty_struct(o_tty, driver->other, idx); tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); if (tty->termios == NULL) - goto free_mem_out; + goto err_free_mem; *tty->termios = driver->init_termios; tty->termios_locked = tty->termios + 1; o_tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); if (o_tty->termios == NULL) - goto free_mem_out; + goto err_free_mem; *o_tty->termios = driver->other->init_termios; o_tty->termios_locked = o_tty->termios + 1; @@ -591,11 +590,13 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty) tty->count++; pty_count++; return 0; -free_mem_out: +err_free_mem: + deinitialize_tty_struct(o_tty); kfree(o_tty->termios); + kfree(tty->termios); module_put(o_tty->driver->owner); +err_free_tty: free_tty_struct(o_tty); - kfree(tty->termios); return -ENOMEM; } diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index 036feeb5e3f6..13043e8d37fe 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -1380,7 +1380,6 @@ static void rp_send_xchar(struct tty_struct *tty, char ch) static void rp_throttle(struct tty_struct *tty) { struct r_port *info = tty->driver_data; - CHANNEL_t *cp; #ifdef ROCKET_DEBUG_THROTTLE printk(KERN_INFO "throttle %s: %d....\n", tty->name, @@ -1390,7 +1389,6 @@ static void rp_throttle(struct tty_struct *tty) if (rocket_paranoia_check(info, "rp_throttle")) return; - cp = &info->channel; if (I_IXOFF(tty)) rp_send_xchar(tty, STOP_CHAR(tty)); @@ -1400,7 +1398,6 @@ static void rp_throttle(struct tty_struct *tty) static void rp_unthrottle(struct tty_struct *tty) { struct r_port *info = tty->driver_data; - CHANNEL_t *cp; #ifdef ROCKET_DEBUG_THROTTLE printk(KERN_INFO "unthrottle %s: %d....\n", tty->name, tty->ldisc.chars_in_buffer(tty)); @@ -1409,7 +1406,6 @@ static void rp_unthrottle(struct tty_struct *tty) if (rocket_paranoia_check(info, "rp_throttle")) return; - cp = &info->channel; if (I_IXOFF(tty)) rp_send_xchar(tty, START_CHAR(tty)); @@ -1722,13 +1718,10 @@ static int rp_write_room(struct tty_struct *tty) static int rp_chars_in_buffer(struct tty_struct *tty) { struct r_port *info = tty->driver_data; - CHANNEL_t *cp; if (rocket_paranoia_check(info, "rp_chars_in_buffer")) return 0; - cp = &info->channel; - #ifdef ROCKET_DEBUG_WRITE printk(KERN_INFO "rp_chars_in_buffer returns %d...\n", info->xmit_cnt); #endif @@ -1779,7 +1772,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) { int num_aiops, aiop, max_num_aiops, num_chan, chan; unsigned int aiopio[MAX_AIOPS_PER_BOARD]; - char *str, *board_type; CONTROLLER_t *ctlp; int fast_clock = 0; @@ -1800,7 +1792,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) /* Depending on the model, set up some config variables */ switch (dev->device) { case PCI_DEVICE_ID_RP4QUAD: - str = "Quadcable"; max_num_aiops = 1; ports_per_aiop = 4; rocketModel[i].model = MODEL_RP4QUAD; @@ -1808,42 +1799,36 @@ static __init int register_PCI(int i, struct pci_dev *dev) rocketModel[i].numPorts = 4; break; case PCI_DEVICE_ID_RP8OCTA: - str = "Octacable"; max_num_aiops = 1; rocketModel[i].model = MODEL_RP8OCTA; strcpy(rocketModel[i].modelString, "RocketPort 8 port w/octa cable"); rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_URP8OCTA: - str = "Octacable"; max_num_aiops = 1; rocketModel[i].model = MODEL_UPCI_RP8OCTA; strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/octa cable"); rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_RP8INTF: - str = "8"; max_num_aiops = 1; rocketModel[i].model = MODEL_RP8INTF; strcpy(rocketModel[i].modelString, "RocketPort 8 port w/external I/F"); rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_URP8INTF: - str = "8"; max_num_aiops = 1; rocketModel[i].model = MODEL_UPCI_RP8INTF; strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/external I/F"); rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_RP8J: - str = "8J"; max_num_aiops = 1; rocketModel[i].model = MODEL_RP8J; strcpy(rocketModel[i].modelString, "RocketPort 8 port w/RJ11 connectors"); rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_RP4J: - str = "4J"; max_num_aiops = 1; ports_per_aiop = 4; rocketModel[i].model = MODEL_RP4J; @@ -1851,56 +1836,48 @@ static __init int register_PCI(int i, struct pci_dev *dev) rocketModel[i].numPorts = 4; break; case PCI_DEVICE_ID_RP8SNI: - str = "8 (DB78 Custom)"; max_num_aiops = 1; rocketModel[i].model = MODEL_RP8SNI; strcpy(rocketModel[i].modelString, "RocketPort 8 port w/ custom DB78"); rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_RP16SNI: - str = "16 (DB78 Custom)"; max_num_aiops = 2; rocketModel[i].model = MODEL_RP16SNI; strcpy(rocketModel[i].modelString, "RocketPort 16 port w/ custom DB78"); rocketModel[i].numPorts = 16; break; case PCI_DEVICE_ID_RP16INTF: - str = "16"; max_num_aiops = 2; rocketModel[i].model = MODEL_RP16INTF; strcpy(rocketModel[i].modelString, "RocketPort 16 port w/external I/F"); rocketModel[i].numPorts = 16; break; case PCI_DEVICE_ID_URP16INTF: - str = "16"; max_num_aiops = 2; rocketModel[i].model = MODEL_UPCI_RP16INTF; strcpy(rocketModel[i].modelString, "RocketPort UPCI 16 port w/external I/F"); rocketModel[i].numPorts = 16; break; case PCI_DEVICE_ID_CRP16INTF: - str = "16"; max_num_aiops = 2; rocketModel[i].model = MODEL_CPCI_RP16INTF; strcpy(rocketModel[i].modelString, "RocketPort Compact PCI 16 port w/external I/F"); rocketModel[i].numPorts = 16; break; case PCI_DEVICE_ID_RP32INTF: - str = "32"; max_num_aiops = 4; rocketModel[i].model = MODEL_RP32INTF; strcpy(rocketModel[i].modelString, "RocketPort 32 port w/external I/F"); rocketModel[i].numPorts = 32; break; case PCI_DEVICE_ID_URP32INTF: - str = "32"; max_num_aiops = 4; rocketModel[i].model = MODEL_UPCI_RP32INTF; strcpy(rocketModel[i].modelString, "RocketPort UPCI 32 port w/external I/F"); rocketModel[i].numPorts = 32; break; case PCI_DEVICE_ID_RPP4: - str = "Plus Quadcable"; max_num_aiops = 1; ports_per_aiop = 4; altChanRingIndicator++; @@ -1910,7 +1887,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) rocketModel[i].numPorts = 4; break; case PCI_DEVICE_ID_RPP8: - str = "Plus Octacable"; max_num_aiops = 2; ports_per_aiop = 4; altChanRingIndicator++; @@ -1920,7 +1896,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) rocketModel[i].numPorts = 8; break; case PCI_DEVICE_ID_RP2_232: - str = "Plus 2 (RS-232)"; max_num_aiops = 1; ports_per_aiop = 2; altChanRingIndicator++; @@ -1930,7 +1905,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) rocketModel[i].numPorts = 2; break; case PCI_DEVICE_ID_RP2_422: - str = "Plus 2 (RS-422)"; max_num_aiops = 1; ports_per_aiop = 2; altChanRingIndicator++; @@ -1943,7 +1917,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) max_num_aiops = 1; ports_per_aiop = 6; - str = "6-port"; /* If revision is 1, the rocketmodem flash must be loaded. * If it is 2 it is a "socketed" version. */ @@ -1961,7 +1934,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) case PCI_DEVICE_ID_RP4M: max_num_aiops = 1; ports_per_aiop = 4; - str = "4-port"; if (dev->revision == 1) { rcktpt_type[i] = ROCKET_TYPE_MODEMII; rocketModel[i].loadrm2 = 1; @@ -1974,7 +1946,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) rocketModel[i].numPorts = 4; break; default: - str = "(unknown/unsupported)"; max_num_aiops = 0; break; } @@ -2000,14 +1971,12 @@ static __init int register_PCI(int i, struct pci_dev *dev) if (! (sInW(ConfigIO + _PCI_9030_GPIO_CTRL) & PCI_GPIO_CTRL_8PORT)) { - str = "Quadcable"; ports_per_aiop = 4; rocketModel[i].numPorts = 4; } } break; case PCI_DEVICE_ID_UPCI_RM3_8PORT: - str = "8 ports"; max_num_aiops = 1; rocketModel[i].model = MODEL_UPCI_RM3_8PORT; strcpy(rocketModel[i].modelString, "RocketModem III 8 port"); @@ -2018,7 +1987,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) rcktpt_type[i] = ROCKET_TYPE_MODEMIII; break; case PCI_DEVICE_ID_UPCI_RM3_4PORT: - str = "4 ports"; max_num_aiops = 1; rocketModel[i].model = MODEL_UPCI_RM3_4PORT; strcpy(rocketModel[i].modelString, "RocketModem III 4 port"); @@ -2032,21 +2000,6 @@ static __init int register_PCI(int i, struct pci_dev *dev) break; } - switch (rcktpt_type[i]) { - case ROCKET_TYPE_MODEM: - board_type = "RocketModem"; - break; - case ROCKET_TYPE_MODEMII: - board_type = "RocketModem II"; - break; - case ROCKET_TYPE_MODEMIII: - board_type = "RocketModem III"; - break; - default: - board_type = "RocketPort"; - break; - } - if (fast_clock) { sClockPrescale = 0x12; /* mod 2 (divide by 3) */ rp_baud_base[i] = 921600; diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c index d89aa38c5cf0..1b37626e8f13 100644 --- a/drivers/tty/serial/21285.c +++ b/drivers/tty/serial/21285.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/21285.c - * * Driver for the serial port on the 21285 StrongArm-110 core logic chip. * * Based on drivers/char/serial.c diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index 6611535f4440..b40f7b90c81d 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/8250.c - * * Driver for 8250/16550-type serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. @@ -273,7 +271,7 @@ static const struct serial8250_config uart_config[] = { .fifo_size = 32, .tx_loadsz = 32, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO | UART_CAP_UUE, + .flags = UART_CAP_FIFO | UART_CAP_UUE | UART_CAP_RTOIE, }, [PORT_RM9000] = { .name = "RM9000", @@ -303,6 +301,14 @@ static const struct serial8250_config uart_config[] = { .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, .flags = UART_CAP_FIFO | UART_CAP_AFE, }, + [PORT_TEGRA] = { + .name = "Tegra", + .fifo_size = 32, + .tx_loadsz = 8, + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 | + UART_FCR_T_TRIG_01, + .flags = UART_CAP_FIFO | UART_CAP_RTOIE, + }, }; #if defined(CONFIG_MIPS_ALCHEMY) @@ -1427,6 +1433,27 @@ static void serial8250_enable_ms(struct uart_port *port) serial_out(up, UART_IER, up->ier); } +/* + * Clear the Tegra rx fifo after a break + * + * FIXME: This needs to become a port specific callback once we have a + * framework for this + */ +static void clear_rx_fifo(struct uart_8250_port *up) +{ + unsigned int status, tmout = 10000; + do { + status = serial_in(up, UART_LSR); + if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS)) + status = serial_in(up, UART_RX); + else + break; + if (--tmout == 0) + break; + udelay(1); + } while (1); +} + static void receive_chars(struct uart_8250_port *up, unsigned int *status) { @@ -1462,6 +1489,13 @@ receive_chars(struct uart_8250_port *up, unsigned int *status) lsr &= ~(UART_LSR_FE | UART_LSR_PE); up->port.icount.brk++; /* + * If tegra port then clear the rx fifo to + * accept another break/character. + */ + if (up->port.type == PORT_TEGRA) + clear_rx_fifo(up); + + /* * We do the SysRQ and SAK checking * here because otherwise the break * may get masked by ignore_status_mask @@ -2405,7 +2439,9 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; if (up->capabilities & UART_CAP_UUE) - up->ier |= UART_IER_UUE | UART_IER_RTOIE; + up->ier |= UART_IER_UUE; + if (up->capabilities & UART_CAP_RTOIE) + up->ier |= UART_IER_RTOIE; serial_out(up, UART_IER, up->ier); diff --git a/drivers/tty/serial/8250.h b/drivers/tty/serial/8250.h index 6e19ea3e48d5..6edf4a6a22d4 100644 --- a/drivers/tty/serial/8250.h +++ b/drivers/tty/serial/8250.h @@ -1,6 +1,4 @@ /* - * linux/drivers/char/8250.h - * * Driver for 8250/16550-type serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. @@ -44,6 +42,7 @@ struct serial8250_config { #define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ +#define UART_CAP_RTOIE (1 << 13) /* UART needs IER bit 4 set (Xscale, Tegra) */ #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ diff --git a/drivers/tty/serial/8250_accent.c b/drivers/tty/serial/8250_accent.c index 9c10262f2469..34b51c651192 100644 --- a/drivers/tty/serial/8250_accent.c +++ b/drivers/tty/serial/8250_accent.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/8250_accent.c - * * Copyright (C) 2005 Russell King. * Data taken from include/asm-i386/serial.h * diff --git a/drivers/tty/serial/8250_boca.c b/drivers/tty/serial/8250_boca.c index 3bfe0f7b26fb..d125dc107985 100644 --- a/drivers/tty/serial/8250_boca.c +++ b/drivers/tty/serial/8250_boca.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/8250_boca.c - * * Copyright (C) 2005 Russell King. * Data taken from include/asm-i386/serial.h * diff --git a/drivers/tty/serial/8250_exar_st16c554.c b/drivers/tty/serial/8250_exar_st16c554.c index 567143ace159..bf53aabf9b5e 100644 --- a/drivers/tty/serial/8250_exar_st16c554.c +++ b/drivers/tty/serial/8250_exar_st16c554.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/8250_exar.c - * * Written by Paul B Schroeder < pschroeder "at" uplogix "dot" com > * Based on 8250_boca. * diff --git a/drivers/tty/serial/8250_fourport.c b/drivers/tty/serial/8250_fourport.c index 6375d68b7913..be1582609626 100644 --- a/drivers/tty/serial/8250_fourport.c +++ b/drivers/tty/serial/8250_fourport.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/8250_fourport.c - * * Copyright (C) 2005 Russell King. * Data taken from include/asm-i386/serial.h * diff --git a/drivers/tty/serial/8250_hub6.c b/drivers/tty/serial/8250_hub6.c index 7609150e7d5e..a5c778e83de0 100644 --- a/drivers/tty/serial/8250_hub6.c +++ b/drivers/tty/serial/8250_hub6.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/8250_hub6.c - * * Copyright (C) 2005 Russell King. * Data taken from include/asm-i386/serial.h * diff --git a/drivers/tty/serial/8250_mca.c b/drivers/tty/serial/8250_mca.c index d10be944ad44..d20abf04541e 100644 --- a/drivers/tty/serial/8250_mca.c +++ b/drivers/tty/serial/8250_mca.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/8250_mca.c - * * Copyright (C) 2005 Russell King. * Data taken from include/asm-i386/serial.h * diff --git a/drivers/tty/serial/8250_pci.c b/drivers/tty/serial/8250_pci.c index 738cec9807d3..4b4968a294b2 100644 --- a/drivers/tty/serial/8250_pci.c +++ b/drivers/tty/serial/8250_pci.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/8250_pci.c - * * Probe module for 8250/16550-type PCI serial ports. * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. @@ -973,6 +971,14 @@ ce4100_serial_setup(struct serial_private *priv, return ret; } +static int +pci_omegapci_setup(struct serial_private *priv, + struct pciserial_board *board, + struct uart_port *port, int idx) +{ + return setup_port(priv, port, 2, idx * 8, 0); +} + static int skip_tx_en_setup(struct serial_private *priv, const struct pciserial_board *board, struct uart_port *port, int idx) @@ -1012,6 +1018,8 @@ static int skip_tx_en_setup(struct serial_private *priv, #define PCI_DEVICE_ID_TITAN_200EI 0xA016 #define PCI_DEVICE_ID_TITAN_200EISI 0xA017 #define PCI_DEVICE_ID_OXSEMI_16PCI958 0x9538 +#define PCIE_DEVICE_ID_NEO_2_OX_IBM 0x00F6 +#define PCI_DEVICE_ID_PLX_CRONYX_OMEGA 0xc001 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 @@ -1412,7 +1420,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .setup = pci_default_setup, }, /* - * For Oxford Semiconductor and Mainpine + * For Oxford Semiconductor Tornado based devices */ { .vendor = PCI_VENDOR_ID_OXSEMI, @@ -1430,6 +1438,24 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .init = pci_oxsemi_tornado_init, .setup = pci_default_setup, }, + { + .vendor = PCI_VENDOR_ID_DIGI, + .device = PCIE_DEVICE_ID_NEO_2_OX_IBM, + .subvendor = PCI_SUBVENDOR_ID_IBM, + .subdevice = PCI_ANY_ID, + .init = pci_oxsemi_tornado_init, + .setup = pci_default_setup, + }, + /* + * Cronyx Omega PCI (PLX-chip based) + */ + { + .vendor = PCI_VENDOR_ID_PLX, + .device = PCI_DEVICE_ID_PLX_CRONYX_OMEGA, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = pci_omegapci_setup, + }, /* * Default "match everything" terminator entry */ @@ -1617,6 +1643,7 @@ enum pci_board_num_t { pbn_ADDIDATA_PCIe_4_3906250, pbn_ADDIDATA_PCIe_8_3906250, pbn_ce4100_1_115200, + pbn_omegapci, }; /* @@ -2312,6 +2339,12 @@ static struct pciserial_board pci_boards[] __devinitdata = { .base_baud = 921600, .reg_shift = 2, }, + [pbn_omegapci] = { + .flags = FL_BASE0, + .num_ports = 8, + .base_baud = 115200, + .uart_offset = 0x200, + }, }; static const struct pci_device_id softmodem_blacklist[] = { @@ -3075,6 +3108,14 @@ static struct pci_device_id serial_pci_tbl[] = { { PCI_VENDOR_ID_MAINPINE, 0x4000, /* IQ Express 8 Port V.34 Super-G3 Fax */ PCI_VENDOR_ID_MAINPINE, 0x4008, 0, 0, pbn_oxsemi_8_4000000 }, + + /* + * Digi/IBM PCIe 2-port Async EIA-232 Adapter utilizing OxSemi Tornado + */ + { PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_2_OX_IBM, + PCI_SUBVENDOR_ID_IBM, PCI_ANY_ID, 0, 0, + pbn_oxsemi_2_4000000 }, + /* * SBS Technologies, Inc. P-Octal and PMC-OCTPRO cards, * from skokodyn@yahoo.com @@ -3801,6 +3842,12 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_ce4100_1_115200 }, + /* + * Cronyx Omega PCI + */ + { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_CRONYX_OMEGA, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_omegapci }, /* * These entries match devices with class COMMUNICATION_SERIAL, diff --git a/drivers/tty/serial/8250_pnp.c b/drivers/tty/serial/8250_pnp.c index 4822cb50cd0f..fc301f6722e1 100644 --- a/drivers/tty/serial/8250_pnp.c +++ b/drivers/tty/serial/8250_pnp.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/8250_pnp.c - * * Probe module for 8250/16550-type ISAPNP serial ports. * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index b1f0f83b870d..636144cea932 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -537,7 +537,7 @@ config SERIAL_S3C6400 config SERIAL_S5PV210 tristate "Samsung S5PV210 Serial port support" - depends on SERIAL_SAMSUNG && (CPU_S5PV210 || CPU_S5P6442 || CPU_EXYNOS4210) + depends on SERIAL_SAMSUNG && (CPU_S5PV210 || CPU_EXYNOS4210) select SERIAL_SAMSUNG_UARTS_4 if (CPU_S5PV210 || CPU_EXYNOS4210) default y help @@ -1585,7 +1585,7 @@ config SERIAL_IFX6X60 Support for the IFX6x60 modem devices on Intel MID platforms. config SERIAL_PCH_UART - tristate "Intel EG20T PCH UART/OKI SEMICONDUCTOR ML7213 IOH" + tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223) UART" depends on PCI select SERIAL_CORE help @@ -1593,10 +1593,12 @@ config SERIAL_PCH_UART which is an IOH(Input/Output Hub) for x86 embedded processor. Enabling PCH_DMA, this PCH UART works as DMA mode. - This driver also can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/ - Output Hub) which is for IVI(In-Vehicle Infotainment) use. - ML7213 is companion chip for Intel Atom E6xx series. - ML7213 is completely compatible for Intel EG20T PCH. + This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ + Output Hub), ML7213 and ML7223. + ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is + for MP(Media Phone) use. + ML7213/ML7223 is companion chip for Intel Atom E6xx series. + ML7213/ML7223 is completely compatible for Intel EG20T PCH. config SERIAL_MSM_SMD bool "Enable tty device interface for some SMD ports" @@ -1620,4 +1622,17 @@ config SERIAL_MXS_AUART_CONSOLE help Enable a MXS AUART port to be the system console. +config SERIAL_XILINX_PS_UART + tristate "Xilinx PS UART support" + select SERIAL_CORE + help + This driver supports the Xilinx PS UART port. + +config SERIAL_XILINX_PS_UART_CONSOLE + bool "Xilinx PS UART console support" + depends on SERIAL_XILINX_PS_UART=y + select SERIAL_CORE_CONSOLE + help + Enable a Xilinx PS UART port to be the system console. + endmenu diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 35276043d9d1..cb2628fee4c7 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -95,3 +95,4 @@ obj-$(CONFIG_SERIAL_PCH_UART) += pch_uart.o obj-$(CONFIG_SERIAL_MSM_SMD) += msm_smd_tty.o obj-$(CONFIG_SERIAL_MXS_AUART) += mxs-auart.o obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o +obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 6d5b036ac783..50bc5a5ac653 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -540,11 +540,14 @@ static int __devinit altera_uart_probe(struct platform_device *pdev) int i = pdev->id; int ret; - /* -1 emphasizes that the platform must have one port, no .N suffix */ - if (i == -1) - i = 0; + /* if id is -1 scan for a free id and use that one */ + if (i == -1) { + for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS; i++) + if (altera_uart_ports[i].port.mapbase == 0) + break; + } - if (i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) + if (i < 0 || i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) return -EINVAL; port = &altera_uart_ports[i].port; @@ -587,6 +590,8 @@ static int __devinit altera_uart_probe(struct platform_device *pdev) port->ops = &altera_uart_ops; port->flags = UPF_BOOT_AUTOCONF; + dev_set_drvdata(&pdev->dev, port); + uart_add_one_port(&altera_uart_driver, port); return 0; @@ -594,14 +599,13 @@ static int __devinit altera_uart_probe(struct platform_device *pdev) static int __devexit altera_uart_remove(struct platform_device *pdev) { - struct uart_port *port; - int i = pdev->id; + struct uart_port *port = dev_get_drvdata(&pdev->dev); - if (i == -1) - i = 0; - - port = &altera_uart_ports[i].port; - uart_remove_one_port(&altera_uart_driver, port); + if (port) { + uart_remove_one_port(&altera_uart_driver, port); + dev_set_drvdata(&pdev->dev, NULL); + port->mapbase = 0; + } return 0; } diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index d742dd2c525c..c0d10c4ddb73 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/amba.c - * * Driver for AMBA serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 6deee4e546be..8dc0541feecc 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/amba.c - * * Driver for AMBA serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index f119d1761106..652bdac8ce8e 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/atmel_serial.c - * * Driver for Atmel AT91 / AT32 Serial ports * Copyright (C) 2003 Rick Bronson * diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index b6acd19b458e..e6c3dbd781d6 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/clps711x.c - * * Driver for CLPS711x serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. diff --git a/drivers/tty/serial/cpm_uart/cpm_uart.h b/drivers/tty/serial/cpm_uart/cpm_uart.h index b754dcf0fda5..cf34d26ff6cd 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart.h +++ b/drivers/tty/serial/cpm_uart/cpm_uart.h @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/cpm_uart.h - * * Driver for CPM (SCC/SMC) serial ports * * Copyright (C) 2004 Freescale Semiconductor, Inc. diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index a9a6a5fd169e..9488da74d4f7 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/cpm_uart.c - * * Driver for CPM (SCC/SMC) serial ports; core driver * * Based on arch/ppc/cpm2_io/uart.c by Dan Malek diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c index 3fc1d66e32c6..18f79575894a 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/cpm_uart.c - * * Driver for CPM (SCC/SMC) serial ports; CPM1 definitions * * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h index 10eecd6af6d4..60c7e94cde1e 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h +++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/cpm_uart/cpm_uart_cpm1.h - * * Driver for CPM (SCC/SMC) serial ports * * definitions for cpm1 diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c index 814ac006393f..a4927e66e741 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/cpm_uart_cpm2.c - * * Driver for CPM (SCC/SMC) serial ports; CPM2 definitions * * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h index 7194c63dcf5f..51e651a69938 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h +++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.h @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/cpm_uart/cpm_uart_cpm2.h - * * Driver for CPM (SCC/SMC) serial ports * * definitions for cpm2 diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c index 8ee5a41d340d..5315525220fb 100644 --- a/drivers/tty/serial/ifx6x60.c +++ b/drivers/tty/serial/ifx6x60.c @@ -41,7 +41,6 @@ #include <linux/tty.h> #include <linux/device.h> #include <linux/spi/spi.h> -#include <linux/tty.h> #include <linux/kfifo.h> #include <linux/tty_flip.h> #include <linux/timer.h> @@ -56,7 +55,6 @@ #include <linux/sched.h> #include <linux/time.h> #include <linux/wait.h> -#include <linux/tty.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/spi/ifx_modem.h> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 62df72d9f0aa..a54473123e0a 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/imx.c - * * Driver for Motorola IMX serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index bfee9b4c6661..e6ba83876508 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -1,5 +1,5 @@ /* - * drivers/serial/msm_serial.c - driver for msm7k serial device and console + * Driver for msm7k serial device and console * * Copyright (C) 2007 Google, Inc. * Author: Robert Love <rlove@google.com> diff --git a/drivers/tty/serial/msm_serial.h b/drivers/tty/serial/msm_serial.h index 9b8dc5d0d855..e4acef5de77e 100644 --- a/drivers/tty/serial/msm_serial.h +++ b/drivers/tty/serial/msm_serial.h @@ -1,6 +1,4 @@ /* - * drivers/serial/msm_serial.h - * * Copyright (C) 2007 Google, Inc. * Author: Robert Love <rlove@google.com> * Copyright (c) 2011, Code Aurora Forum. All rights reserved. diff --git a/drivers/tty/serial/msm_smd_tty.c b/drivers/tty/serial/msm_smd_tty.c index beeff1e86093..4f41dcdcb771 100644 --- a/drivers/tty/serial/msm_smd_tty.c +++ b/drivers/tty/serial/msm_smd_tty.c @@ -1,5 +1,4 @@ -/* drivers/tty/serial/msm_smd_tty.c - * +/* * Copyright (C) 2007 Google, Inc. * Copyright (c) 2011, Code Aurora Forum. All rights reserved. * Author: Brian Swetland <swetland@google.com> diff --git a/drivers/tty/serial/netx-serial.c b/drivers/tty/serial/netx-serial.c index 7735c9f35fa0..d40da78e7c85 100644 --- a/drivers/tty/serial/netx-serial.c +++ b/drivers/tty/serial/netx-serial.c @@ -1,6 +1,4 @@ /* - * drivers/serial/netx-serial.c - * * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix * * This program is free software; you can redistribute it and/or modify diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 26403b8e4b9b..c63d0d152af6 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -253,6 +253,8 @@ enum pch_uart_num_t { pch_ml7213_uart0, pch_ml7213_uart1, pch_ml7213_uart2, + pch_ml7223_uart0, + pch_ml7223_uart1, }; static struct pch_uart_driver_data drv_dat[] = { @@ -263,6 +265,8 @@ static struct pch_uart_driver_data drv_dat[] = { [pch_ml7213_uart0] = {PCH_UART_8LINE, 0}, [pch_ml7213_uart1] = {PCH_UART_2LINE, 1}, [pch_ml7213_uart2] = {PCH_UART_2LINE, 2}, + [pch_ml7223_uart0] = {PCH_UART_8LINE, 0}, + [pch_ml7223_uart1] = {PCH_UART_2LINE, 1}, }; static unsigned int default_baud = 9600; @@ -1534,6 +1538,10 @@ static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = { .driver_data = pch_ml7213_uart1}, {PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8029), .driver_data = pch_ml7213_uart2}, + {PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x800C), + .driver_data = pch_ml7223_uart0}, + {PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x800D), + .driver_data = pch_ml7223_uart1}, {0,}, }; diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index e1c8d4f1ce58..5acd24a27d08 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/pmac_zilog.c - * * Driver for PowerMac Z85c30 based ESCC cell found in the * "macio" ASICs of various PowerMac models * diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 1102a39b44f5..4302e6e3768e 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -1,6 +1,4 @@ /* - * linux/drivers/serial/pxa.c - * * Based on drivers/serial/8250.c by Russell King. * * Author: Nicolas Pitre diff --git a/drivers/tty/serial/s3c2400.c b/drivers/tty/serial/s3c2400.c index fed1a9a1ffb4..d13051b3df87 100644 --- a/drivers/tty/serial/s3c2400.c +++ b/drivers/tty/serial/s3c2400.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s3c240.c - * +/* * Driver for Samsung SoC onboard UARTs. * * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics diff --git a/drivers/tty/serial/s3c2410.c b/drivers/tty/serial/s3c2410.c index 73f089d3efd6..bffe6ff9b158 100644 --- a/drivers/tty/serial/s3c2410.c +++ b/drivers/tty/serial/s3c2410.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s3c2410.c - * +/* * Driver for Samsung S3C2410 SoC onboard UARTs. * * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics diff --git a/drivers/tty/serial/s3c2412.c b/drivers/tty/serial/s3c2412.c index 1700b1a2fb7e..7e2b9504a687 100644 --- a/drivers/tty/serial/s3c2412.c +++ b/drivers/tty/serial/s3c2412.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s3c2412.c - * +/* * Driver for Samsung S3C2412 and S3C2413 SoC onboard UARTs. * * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics diff --git a/drivers/tty/serial/s3c2440.c b/drivers/tty/serial/s3c2440.c index 094cc3904b13..9e10d415d5fd 100644 --- a/drivers/tty/serial/s3c2440.c +++ b/drivers/tty/serial/s3c2440.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s3c2440.c - * +/* * Driver for Samsung S3C2440 and S3C2442 SoC onboard UARTs. * * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics diff --git a/drivers/tty/serial/s3c24a0.c b/drivers/tty/serial/s3c24a0.c index fad6083ca427..914eff22e499 100644 --- a/drivers/tty/serial/s3c24a0.c +++ b/drivers/tty/serial/s3c24a0.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s3c24a0.c - * +/* * Driver for Samsung S3C24A0 SoC onboard UARTs. * * Based on drivers/serial/s3c2410.c diff --git a/drivers/tty/serial/s3c6400.c b/drivers/tty/serial/s3c6400.c index 4be92ab50058..ded26c42ff37 100644 --- a/drivers/tty/serial/s3c6400.c +++ b/drivers/tty/serial/s3c6400.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s3c6400.c - * +/* * Driver for Samsung S3C6400 and S3C6410 SoC onboard UARTs. * * Copyright 2008 Openmoko, Inc. diff --git a/drivers/tty/serial/s5pv210.c b/drivers/tty/serial/s5pv210.c index 6ebccd70a707..fb2619f93d84 100644 --- a/drivers/tty/serial/s5pv210.c +++ b/drivers/tty/serial/s5pv210.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/s5pv210.c - * +/* * Copyright (c) 2010 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c index 2199d819a987..ef7a21a6a01b 100644 --- a/drivers/tty/serial/sa1100.c +++ b/drivers/tty/serial/sa1100.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/sa1100.c - * * Driver for SA11x0 serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 9e2fa8d784e2..f66f64829303 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1,5 +1,4 @@ -/* linux/drivers/serial/samsuing.c - * +/* * Driver core for Samsung SoC onboard UARTs. * * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h index 0ac06a07d25f..5b098cd76040 100644 --- a/drivers/tty/serial/samsung.h +++ b/drivers/tty/serial/samsung.h @@ -1,5 +1,4 @@ -/* linux/drivers/serial/samsung.h - * +/* * Driver for Samsung SoC onboard UARTs. * * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c index 602d9845c52f..ea2340b814e9 100644 --- a/drivers/tty/serial/sb1250-duart.c +++ b/drivers/tty/serial/sb1250-duart.c @@ -1,6 +1,4 @@ /* - * drivers/serial/sb1250-duart.c - * * Support for the asynchronous serial interface (DUART) included * in the BCM1250 and derived System-On-a-Chip (SOC) devices. * diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 733fe8e73f0f..db7912cb7ae0 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/core.c - * * Driver core for serial ports * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. @@ -172,12 +170,16 @@ static int uart_startup(struct tty_struct *tty, struct uart_state *state, int in retval = uport->ops->startup(uport); if (retval == 0) { - if (init_hw) { - /* - * Initialise the hardware port settings. - */ - uart_change_speed(tty, state, NULL); + if (uart_console(uport) && uport->cons->cflag) { + tty->termios->c_cflag = uport->cons->cflag; + uport->cons->cflag = 0; + } + /* + * Initialise the hardware port settings. + */ + uart_change_speed(tty, state, NULL); + if (init_hw) { /* * Setup the RTS and DTR signals once the * port is open and ready to respond. @@ -1240,17 +1242,6 @@ static void uart_set_termios(struct tty_struct *tty, } spin_unlock_irqrestore(&state->uart_port->lock, flags); } -#if 0 - /* - * No need to wake up processes in open wait, since they - * sample the CLOCAL flag once, and don't recheck it. - * XXX It's not clear whether the current behavior is correct - * or not. Hence, this may change..... - */ - if (!(old_termios->c_cflag & CLOCAL) && - (tty->termios->c_cflag & CLOCAL)) - wake_up_interruptible(&state->uart_port.open_wait); -#endif } /* @@ -1423,7 +1414,6 @@ static void __uart_wait_until_sent(struct uart_port *port, int timeout) if (time_after(jiffies, expire)) break; } - set_current_state(TASK_RUNNING); /* might not be needed */ } static void uart_wait_until_sent(struct tty_struct *tty, int timeout) @@ -1466,45 +1456,6 @@ static void uart_hangup(struct tty_struct *tty) mutex_unlock(&port->mutex); } -/** - * uart_update_termios - update the terminal hw settings - * @tty: tty associated with UART - * @state: UART to update - * - * Copy across the serial console cflag setting into the termios settings - * for the initial open of the port. This allows continuity between the - * kernel settings, and the settings init adopts when it opens the port - * for the first time. - */ -static void uart_update_termios(struct tty_struct *tty, - struct uart_state *state) -{ - struct uart_port *port = state->uart_port; - - if (uart_console(port) && port->cons->cflag) { - tty->termios->c_cflag = port->cons->cflag; - port->cons->cflag = 0; - } - - /* - * If the device failed to grab its irq resources, - * or some other error occurred, don't try to talk - * to the port hardware. - */ - if (!(tty->flags & (1 << TTY_IO_ERROR))) { - /* - * Make termios settings take effect. - */ - uart_change_speed(tty, state, NULL); - - /* - * And finally enable the RTS and DTR signals. - */ - if (tty->termios->c_cflag & CBAUD) - uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS); - } -} - static int uart_carrier_raised(struct tty_port *port) { struct uart_state *state = container_of(port, struct uart_state, port); @@ -1524,16 +1475,8 @@ static void uart_dtr_rts(struct tty_port *port, int onoff) struct uart_state *state = container_of(port, struct uart_state, port); struct uart_port *uport = state->uart_port; - if (onoff) { + if (onoff) uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS); - - /* - * If this is the first open to succeed, - * adjust things to suit. - */ - if (!test_and_set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags)) - uart_update_termios(port->tty, state); - } else uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); } @@ -1586,15 +1529,6 @@ static int uart_open(struct tty_struct *tty, struct file *filp) pr_debug("uart_open(%d) called\n", line); /* - * tty->driver->num won't change, so we won't fail here with - * tty->driver_data set to something non-NULL (and therefore - * we won't get caught by uart_close()). - */ - retval = -ENODEV; - if (line >= tty->driver->num) - goto fail; - - /* * We take the semaphore inside uart_get to guarantee that we won't * be re-entered while allocating the state structure, or while we * request any IRQs that the driver may need. This also has the nice @@ -1972,13 +1906,9 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) struct tty_port *port = &state->port; struct device *tty_dev; struct uart_match match = {uport, drv}; - struct tty_struct *tty; mutex_lock(&port->mutex); - /* Must be inside the mutex lock until we convert to tty_port */ - tty = port->tty; - tty_dev = device_find_child(uport->dev, &match, serial_match_port); if (device_may_wakeup(tty_dev)) { if (!enable_irq_wake(uport->irq)) diff --git a/drivers/tty/serial/serial_ks8695.c b/drivers/tty/serial/serial_ks8695.c index b1962025b1aa..2430319f2f52 100644 --- a/drivers/tty/serial/serial_ks8695.c +++ b/drivers/tty/serial/serial_ks8695.c @@ -1,6 +1,4 @@ /* - * drivers/serial/serial_ks8695.c - * * Driver for KS8695 serial ports * * Based on drivers/serial/serial_amba.c, by Kam Lee. diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index c50e9fbbf743..8e3fc1944e6d 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -1,6 +1,4 @@ /* - * drivers/serial/serial_txx9.c - * * Derived from many drivers using generic_serial interface, * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c * (was in Linux/VR tree) by Jim Pick. diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 920a6f929c8b..f35b8fb94b83 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1,6 +1,4 @@ /* - * drivers/serial/sh-sci.c - * * SuperH on-chip serial module support. (SCI with no FIFO / with FIFO) * * Copyright (C) 2002 - 2011 Paul Mundt diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index 322bf56c0d89..37fc4e3d487c 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -1,6 +1,4 @@ /* - * drivers/serial/vt8500_serial.c - * * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> * * Based on msm_serial.c, which is: diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c new file mode 100644 index 000000000000..19cc1e8149dd --- /dev/null +++ b/drivers/tty/serial/xilinx_uartps.c @@ -0,0 +1,1113 @@ +/* + * Xilinx PS UART driver + * + * 2011 (c) Xilinx Inc. + * + * This program is free software; you can redistribute it + * and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation; + * either version 2 of the License, or (at your option) any + * later version. + * + */ + +#include <linux/platform_device.h> +#include <linux/serial_core.h> +#include <linux/console.h> +#include <linux/serial.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <linux/of.h> + +#define XUARTPS_TTY_NAME "ttyPS" +#define XUARTPS_NAME "xuartps" +#define XUARTPS_MAJOR 0 /* use dynamic node allocation */ +#define XUARTPS_MINOR 0 /* works best with devtmpfs */ +#define XUARTPS_NR_PORTS 2 +#define XUARTPS_FIFO_SIZE 16 /* FIFO size */ +#define XUARTPS_REGISTER_SPACE 0xFFF + +#define xuartps_readl(offset) ioread32(port->membase + offset) +#define xuartps_writel(val, offset) iowrite32(val, port->membase + offset) + +/********************************Register Map********************************/ +/** UART + * + * Register offsets for the UART. + * + */ +#define XUARTPS_CR_OFFSET 0x00 /* Control Register [8:0] */ +#define XUARTPS_MR_OFFSET 0x04 /* Mode Register [10:0] */ +#define XUARTPS_IER_OFFSET 0x08 /* Interrupt Enable [10:0] */ +#define XUARTPS_IDR_OFFSET 0x0C /* Interrupt Disable [10:0] */ +#define XUARTPS_IMR_OFFSET 0x10 /* Interrupt Mask [10:0] */ +#define XUARTPS_ISR_OFFSET 0x14 /* Interrupt Status [10:0]*/ +#define XUARTPS_BAUDGEN_OFFSET 0x18 /* Baud Rate Generator [15:0] */ +#define XUARTPS_RXTOUT_OFFSET 0x1C /* RX Timeout [7:0] */ +#define XUARTPS_RXWM_OFFSET 0x20 /* RX FIFO Trigger Level [5:0] */ +#define XUARTPS_MODEMCR_OFFSET 0x24 /* Modem Control [5:0] */ +#define XUARTPS_MODEMSR_OFFSET 0x28 /* Modem Status [8:0] */ +#define XUARTPS_SR_OFFSET 0x2C /* Channel Status [11:0] */ +#define XUARTPS_FIFO_OFFSET 0x30 /* FIFO [15:0] or [7:0] */ +#define XUARTPS_BAUDDIV_OFFSET 0x34 /* Baud Rate Divider [7:0] */ +#define XUARTPS_FLOWDEL_OFFSET 0x38 /* Flow Delay [15:0] */ +#define XUARTPS_IRRX_PWIDTH_OFFSET 0x3C /* IR Minimum Received Pulse + Width [15:0] */ +#define XUARTPS_IRTX_PWIDTH_OFFSET 0x40 /* IR Transmitted pulse + Width [7:0] */ +#define XUARTPS_TXWM_OFFSET 0x44 /* TX FIFO Trigger Level [5:0] */ + +/** Control Register + * + * The Control register (CR) controls the major functions of the device. + * + * Control Register Bit Definitions + */ +#define XUARTPS_CR_STOPBRK 0x00000100 /* Stop TX break */ +#define XUARTPS_CR_STARTBRK 0x00000080 /* Set TX break */ +#define XUARTPS_CR_TX_DIS 0x00000020 /* TX disabled. */ +#define XUARTPS_CR_TX_EN 0x00000010 /* TX enabled */ +#define XUARTPS_CR_RX_DIS 0x00000008 /* RX disabled. */ +#define XUARTPS_CR_RX_EN 0x00000004 /* RX enabled */ +#define XUARTPS_CR_TXRST 0x00000002 /* TX logic reset */ +#define XUARTPS_CR_RXRST 0x00000001 /* RX logic reset */ +#define XUARTPS_CR_RST_TO 0x00000040 /* Restart Timeout Counter */ + +/** Mode Register + * + * The mode register (MR) defines the mode of transfer as well as the data + * format. If this register is modified during transmission or reception, + * data validity cannot be guaranteed. + * + * Mode Register Bit Definitions + * + */ +#define XUARTPS_MR_CLKSEL 0x00000001 /* Pre-scalar selection */ +#define XUARTPS_MR_CHMODE_L_LOOP 0x00000200 /* Local loop back mode */ +#define XUARTPS_MR_CHMODE_NORM 0x00000000 /* Normal mode */ + +#define XUARTPS_MR_STOPMODE_2_BIT 0x00000080 /* 2 stop bits */ +#define XUARTPS_MR_STOPMODE_1_BIT 0x00000000 /* 1 stop bit */ + +#define XUARTPS_MR_PARITY_NONE 0x00000020 /* No parity mode */ +#define XUARTPS_MR_PARITY_MARK 0x00000018 /* Mark parity mode */ +#define XUARTPS_MR_PARITY_SPACE 0x00000010 /* Space parity mode */ +#define XUARTPS_MR_PARITY_ODD 0x00000008 /* Odd parity mode */ +#define XUARTPS_MR_PARITY_EVEN 0x00000000 /* Even parity mode */ + +#define XUARTPS_MR_CHARLEN_6_BIT 0x00000006 /* 6 bits data */ +#define XUARTPS_MR_CHARLEN_7_BIT 0x00000004 /* 7 bits data */ +#define XUARTPS_MR_CHARLEN_8_BIT 0x00000000 /* 8 bits data */ + +/** Interrupt Registers + * + * Interrupt control logic uses the interrupt enable register (IER) and the + * interrupt disable register (IDR) to set the value of the bits in the + * interrupt mask register (IMR). The IMR determines whether to pass an + * interrupt to the interrupt status register (ISR). + * Writing a 1 to IER Enables an interrupt, writing a 1 to IDR disables an + * interrupt. IMR and ISR are read only, and IER and IDR are write only. + * Reading either IER or IDR returns 0x00. + * + * All four registers have the same bit definitions. + */ +#define XUARTPS_IXR_TOUT 0x00000100 /* RX Timeout error interrupt */ +#define XUARTPS_IXR_PARITY 0x00000080 /* Parity error interrupt */ +#define XUARTPS_IXR_FRAMING 0x00000040 /* Framing error interrupt */ +#define XUARTPS_IXR_OVERRUN 0x00000020 /* Overrun error interrupt */ +#define XUARTPS_IXR_TXFULL 0x00000010 /* TX FIFO Full interrupt */ +#define XUARTPS_IXR_TXEMPTY 0x00000008 /* TX FIFO empty interrupt */ +#define XUARTPS_ISR_RXEMPTY 0x00000002 /* RX FIFO empty interrupt */ +#define XUARTPS_IXR_RXTRIG 0x00000001 /* RX FIFO trigger interrupt */ +#define XUARTPS_IXR_RXFULL 0x00000004 /* RX FIFO full interrupt. */ +#define XUARTPS_IXR_RXEMPTY 0x00000002 /* RX FIFO empty interrupt. */ +#define XUARTPS_IXR_MASK 0x00001FFF /* Valid bit mask */ + +/** Channel Status Register + * + * The channel status register (CSR) is provided to enable the control logic + * to monitor the status of bits in the channel interrupt status register, + * even if these are masked out by the interrupt mask register. + */ +#define XUARTPS_SR_RXEMPTY 0x00000002 /* RX FIFO empty */ +#define XUARTPS_SR_TXEMPTY 0x00000008 /* TX FIFO empty */ +#define XUARTPS_SR_TXFULL 0x00000010 /* TX FIFO full */ +#define XUARTPS_SR_RXTRIG 0x00000001 /* Rx Trigger */ + +/** + * xuartps_isr - Interrupt handler + * @irq: Irq number + * @dev_id: Id of the port + * + * Returns IRQHANDLED + **/ +static irqreturn_t xuartps_isr(int irq, void *dev_id) +{ + struct uart_port *port = (struct uart_port *)dev_id; + struct tty_struct *tty; + unsigned long flags; + unsigned int isrstatus, numbytes; + unsigned int data; + char status = TTY_NORMAL; + + /* Get the tty which could be NULL so don't assume it's valid */ + tty = tty_port_tty_get(&port->state->port); + + spin_lock_irqsave(&port->lock, flags); + + /* Read the interrupt status register to determine which + * interrupt(s) is/are active. + */ + isrstatus = xuartps_readl(XUARTPS_ISR_OFFSET); + + /* drop byte with parity error if IGNPAR specified */ + if (isrstatus & port->ignore_status_mask & XUARTPS_IXR_PARITY) + isrstatus &= ~(XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT); + + isrstatus &= port->read_status_mask; + isrstatus &= ~port->ignore_status_mask; + + if ((isrstatus & XUARTPS_IXR_TOUT) || + (isrstatus & XUARTPS_IXR_RXTRIG)) { + /* Receive Timeout Interrupt */ + while ((xuartps_readl(XUARTPS_SR_OFFSET) & + XUARTPS_SR_RXEMPTY) != XUARTPS_SR_RXEMPTY) { + data = xuartps_readl(XUARTPS_FIFO_OFFSET); + port->icount.rx++; + + if (isrstatus & XUARTPS_IXR_PARITY) { + port->icount.parity++; + status = TTY_PARITY; + } else if (isrstatus & XUARTPS_IXR_FRAMING) { + port->icount.frame++; + status = TTY_FRAME; + } else if (isrstatus & XUARTPS_IXR_OVERRUN) + port->icount.overrun++; + + if (tty) + uart_insert_char(port, isrstatus, + XUARTPS_IXR_OVERRUN, data, + status); + } + spin_unlock(&port->lock); + if (tty) + tty_flip_buffer_push(tty); + spin_lock(&port->lock); + } + + /* Dispatch an appropriate handler */ + if ((isrstatus & XUARTPS_IXR_TXEMPTY) == XUARTPS_IXR_TXEMPTY) { + if (uart_circ_empty(&port->state->xmit)) { + xuartps_writel(XUARTPS_IXR_TXEMPTY, + XUARTPS_IDR_OFFSET); + } else { + numbytes = port->fifosize; + /* Break if no more data available in the UART buffer */ + while (numbytes--) { + if (uart_circ_empty(&port->state->xmit)) + break; + /* Get the data from the UART circular buffer + * and write it to the xuartps's TX_FIFO + * register. + */ + xuartps_writel( + port->state->xmit.buf[port->state->xmit. + tail], XUARTPS_FIFO_OFFSET); + + port->icount.tx++; + + /* Adjust the tail of the UART buffer and wrap + * the buffer if it reaches limit. + */ + port->state->xmit.tail = + (port->state->xmit.tail + 1) & \ + (UART_XMIT_SIZE - 1); + } + + if (uart_circ_chars_pending( + &port->state->xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + } + } + + xuartps_writel(isrstatus, XUARTPS_ISR_OFFSET); + + /* be sure to release the lock and tty before leaving */ + spin_unlock_irqrestore(&port->lock, flags); + tty_kref_put(tty); + + return IRQ_HANDLED; +} + +/** + * xuartps_set_baud_rate - Calculate and set the baud rate + * @port: Handle to the uart port structure + * @baud: Baud rate to set + * + * Returns baud rate, requested baud when possible, or actual baud when there + * was too much error + **/ +static unsigned int xuartps_set_baud_rate(struct uart_port *port, + unsigned int baud) +{ + unsigned int sel_clk; + unsigned int calc_baud = 0; + unsigned int brgr_val, brdiv_val; + unsigned int bauderror; + + /* Formula to obtain baud rate is + * baud_tx/rx rate = sel_clk/CD * (BDIV + 1) + * input_clk = (Uart User Defined Clock or Apb Clock) + * depends on UCLKEN in MR Reg + * sel_clk = input_clk or input_clk/8; + * depends on CLKS in MR reg + * CD and BDIV depends on values in + * baud rate generate register + * baud rate clock divisor register + */ + sel_clk = port->uartclk; + if (xuartps_readl(XUARTPS_MR_OFFSET) & XUARTPS_MR_CLKSEL) + sel_clk = sel_clk / 8; + + /* Find the best values for baud generation */ + for (brdiv_val = 4; brdiv_val < 255; brdiv_val++) { + + brgr_val = sel_clk / (baud * (brdiv_val + 1)); + if (brgr_val < 2 || brgr_val > 65535) + continue; + + calc_baud = sel_clk / (brgr_val * (brdiv_val + 1)); + + if (baud > calc_baud) + bauderror = baud - calc_baud; + else + bauderror = calc_baud - baud; + + /* use the values when percent error is acceptable */ + if (((bauderror * 100) / baud) < 3) { + calc_baud = baud; + break; + } + } + + /* Set the values for the new baud rate */ + xuartps_writel(brgr_val, XUARTPS_BAUDGEN_OFFSET); + xuartps_writel(brdiv_val, XUARTPS_BAUDDIV_OFFSET); + + return calc_baud; +} + +/*----------------------Uart Operations---------------------------*/ + +/** + * xuartps_start_tx - Start transmitting bytes + * @port: Handle to the uart port structure + * + **/ +static void xuartps_start_tx(struct uart_port *port) +{ + unsigned int status, numbytes = port->fifosize; + + if (uart_circ_empty(&port->state->xmit) || uart_tx_stopped(port)) + return; + + status = xuartps_readl(XUARTPS_CR_OFFSET); + /* Set the TX enable bit and clear the TX disable bit to enable the + * transmitter. + */ + xuartps_writel((status & ~XUARTPS_CR_TX_DIS) | XUARTPS_CR_TX_EN, + XUARTPS_CR_OFFSET); + + while (numbytes-- && ((xuartps_readl(XUARTPS_SR_OFFSET) + & XUARTPS_SR_TXFULL)) != XUARTPS_SR_TXFULL) { + + /* Break if no more data available in the UART buffer */ + if (uart_circ_empty(&port->state->xmit)) + break; + + /* Get the data from the UART circular buffer and + * write it to the xuartps's TX_FIFO register. + */ + xuartps_writel( + port->state->xmit.buf[port->state->xmit.tail], + XUARTPS_FIFO_OFFSET); + port->icount.tx++; + + /* Adjust the tail of the UART buffer and wrap + * the buffer if it reaches limit. + */ + port->state->xmit.tail = (port->state->xmit.tail + 1) & + (UART_XMIT_SIZE - 1); + } + + /* Enable the TX Empty interrupt */ + xuartps_writel(XUARTPS_IXR_TXEMPTY, XUARTPS_IER_OFFSET); + + if (uart_circ_chars_pending(&port->state->xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); +} + +/** + * xuartps_stop_tx - Stop TX + * @port: Handle to the uart port structure + * + **/ +static void xuartps_stop_tx(struct uart_port *port) +{ + unsigned int regval; + + regval = xuartps_readl(XUARTPS_CR_OFFSET); + regval |= XUARTPS_CR_TX_DIS; + /* Disable the transmitter */ + xuartps_writel(regval, XUARTPS_CR_OFFSET); +} + +/** + * xuartps_stop_rx - Stop RX + * @port: Handle to the uart port structure + * + **/ +static void xuartps_stop_rx(struct uart_port *port) +{ + unsigned int regval; + + regval = xuartps_readl(XUARTPS_CR_OFFSET); + regval |= XUARTPS_CR_RX_DIS; + /* Disable the receiver */ + xuartps_writel(regval, XUARTPS_CR_OFFSET); +} + +/** + * xuartps_tx_empty - Check whether TX is empty + * @port: Handle to the uart port structure + * + * Returns TIOCSER_TEMT on success, 0 otherwise + **/ +static unsigned int xuartps_tx_empty(struct uart_port *port) +{ + unsigned int status; + + status = xuartps_readl(XUARTPS_ISR_OFFSET) & XUARTPS_IXR_TXEMPTY; + return status ? TIOCSER_TEMT : 0; +} + +/** + * xuartps_break_ctl - Based on the input ctl we have to start or stop + * transmitting char breaks + * @port: Handle to the uart port structure + * @ctl: Value based on which start or stop decision is taken + * + **/ +static void xuartps_break_ctl(struct uart_port *port, int ctl) +{ + unsigned int status; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + status = xuartps_readl(XUARTPS_CR_OFFSET); + + if (ctl == -1) + xuartps_writel(XUARTPS_CR_STARTBRK | status, + XUARTPS_CR_OFFSET); + else { + if ((status & XUARTPS_CR_STOPBRK) == 0) + xuartps_writel(XUARTPS_CR_STOPBRK | status, + XUARTPS_CR_OFFSET); + } + spin_unlock_irqrestore(&port->lock, flags); +} + +/** + * xuartps_set_termios - termios operations, handling data length, parity, + * stop bits, flow control, baud rate + * @port: Handle to the uart port structure + * @termios: Handle to the input termios structure + * @old: Values of the previously saved termios structure + * + **/ +static void xuartps_set_termios(struct uart_port *port, + struct ktermios *termios, struct ktermios *old) +{ + unsigned int cval = 0; + unsigned int baud; + unsigned long flags; + unsigned int ctrl_reg, mode_reg; + + spin_lock_irqsave(&port->lock, flags); + + /* Empty the receive FIFO 1st before making changes */ + while ((xuartps_readl(XUARTPS_SR_OFFSET) & + XUARTPS_SR_RXEMPTY) != XUARTPS_SR_RXEMPTY) { + xuartps_readl(XUARTPS_FIFO_OFFSET); + } + + /* Disable the TX and RX to set baud rate */ + xuartps_writel(xuartps_readl(XUARTPS_CR_OFFSET) | + (XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS), + XUARTPS_CR_OFFSET); + + /* Min baud rate = 6bps and Max Baud Rate is 10Mbps for 100Mhz clk */ + baud = uart_get_baud_rate(port, termios, old, 0, 10000000); + baud = xuartps_set_baud_rate(port, baud); + if (tty_termios_baud_rate(termios)) + tty_termios_encode_baud_rate(termios, baud, baud); + + /* + * Update the per-port timeout. + */ + uart_update_timeout(port, termios->c_cflag, baud); + + /* Set TX/RX Reset */ + xuartps_writel(xuartps_readl(XUARTPS_CR_OFFSET) | + (XUARTPS_CR_TXRST | XUARTPS_CR_RXRST), + XUARTPS_CR_OFFSET); + + ctrl_reg = xuartps_readl(XUARTPS_CR_OFFSET); + + /* Clear the RX disable and TX disable bits and then set the TX enable + * bit and RX enable bit to enable the transmitter and receiver. + */ + xuartps_writel( + (ctrl_reg & ~(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS)) + | (XUARTPS_CR_TX_EN | XUARTPS_CR_RX_EN), + XUARTPS_CR_OFFSET); + + xuartps_writel(10, XUARTPS_RXTOUT_OFFSET); + + port->read_status_mask = XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_RXTRIG | + XUARTPS_IXR_OVERRUN | XUARTPS_IXR_TOUT; + port->ignore_status_mask = 0; + + if (termios->c_iflag & INPCK) + port->read_status_mask |= XUARTPS_IXR_PARITY | + XUARTPS_IXR_FRAMING; + + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= XUARTPS_IXR_PARITY | + XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN; + + /* ignore all characters if CREAD is not set */ + if ((termios->c_cflag & CREAD) == 0) + port->ignore_status_mask |= XUARTPS_IXR_RXTRIG | + XUARTPS_IXR_TOUT | XUARTPS_IXR_PARITY | + XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN; + + mode_reg = xuartps_readl(XUARTPS_MR_OFFSET); + + /* Handling Data Size */ + switch (termios->c_cflag & CSIZE) { + case CS6: + cval |= XUARTPS_MR_CHARLEN_6_BIT; + break; + case CS7: + cval |= XUARTPS_MR_CHARLEN_7_BIT; + break; + default: + case CS8: + cval |= XUARTPS_MR_CHARLEN_8_BIT; + termios->c_cflag &= ~CSIZE; + termios->c_cflag |= CS8; + break; + } + + /* Handling Parity and Stop Bits length */ + if (termios->c_cflag & CSTOPB) + cval |= XUARTPS_MR_STOPMODE_2_BIT; /* 2 STOP bits */ + else + cval |= XUARTPS_MR_STOPMODE_1_BIT; /* 1 STOP bit */ + + if (termios->c_cflag & PARENB) { + /* Mark or Space parity */ + if (termios->c_cflag & CMSPAR) { + if (termios->c_cflag & PARODD) + cval |= XUARTPS_MR_PARITY_MARK; + else + cval |= XUARTPS_MR_PARITY_SPACE; + } else if (termios->c_cflag & PARODD) + cval |= XUARTPS_MR_PARITY_ODD; + else + cval |= XUARTPS_MR_PARITY_EVEN; + } else + cval |= XUARTPS_MR_PARITY_NONE; + xuartps_writel(cval , XUARTPS_MR_OFFSET); + + spin_unlock_irqrestore(&port->lock, flags); +} + +/** + * xuartps_startup - Called when an application opens a xuartps port + * @port: Handle to the uart port structure + * + * Returns 0 on success, negative error otherwise + **/ +static int xuartps_startup(struct uart_port *port) +{ + unsigned int retval = 0, status = 0; + + retval = request_irq(port->irq, xuartps_isr, 0, XUARTPS_NAME, + (void *)port); + if (retval) + return retval; + + /* Disable the TX and RX */ + xuartps_writel(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS, + XUARTPS_CR_OFFSET); + + /* Set the Control Register with TX/RX Enable, TX/RX Reset, + * no break chars. + */ + xuartps_writel(XUARTPS_CR_TXRST | XUARTPS_CR_RXRST, + XUARTPS_CR_OFFSET); + + status = xuartps_readl(XUARTPS_CR_OFFSET); + + /* Clear the RX disable and TX disable bits and then set the TX enable + * bit and RX enable bit to enable the transmitter and receiver. + */ + xuartps_writel((status & ~(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS)) + | (XUARTPS_CR_TX_EN | XUARTPS_CR_RX_EN | + XUARTPS_CR_STOPBRK), XUARTPS_CR_OFFSET); + + /* Set the Mode Register with normal mode,8 data bits,1 stop bit, + * no parity. + */ + xuartps_writel(XUARTPS_MR_CHMODE_NORM | XUARTPS_MR_STOPMODE_1_BIT + | XUARTPS_MR_PARITY_NONE | XUARTPS_MR_CHARLEN_8_BIT, + XUARTPS_MR_OFFSET); + + /* Set the RX FIFO Trigger level to 14 assuming FIFO size as 16 */ + xuartps_writel(14, XUARTPS_RXWM_OFFSET); + + /* Receive Timeout register is enabled with value of 10 */ + xuartps_writel(10, XUARTPS_RXTOUT_OFFSET); + + + /* Set the Interrupt Registers with desired interrupts */ + xuartps_writel(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY | + XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN | + XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT, XUARTPS_IER_OFFSET); + xuartps_writel(~(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY | + XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN | + XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT), XUARTPS_IDR_OFFSET); + + return retval; +} + +/** + * xuartps_shutdown - Called when an application closes a xuartps port + * @port: Handle to the uart port structure + * + **/ +static void xuartps_shutdown(struct uart_port *port) +{ + int status; + + /* Disable interrupts */ + status = xuartps_readl(XUARTPS_IMR_OFFSET); + xuartps_writel(status, XUARTPS_IDR_OFFSET); + + /* Disable the TX and RX */ + xuartps_writel(XUARTPS_CR_TX_DIS | XUARTPS_CR_RX_DIS, + XUARTPS_CR_OFFSET); + free_irq(port->irq, port); +} + +/** + * xuartps_type - Set UART type to xuartps port + * @port: Handle to the uart port structure + * + * Returns string on success, NULL otherwise + **/ +static const char *xuartps_type(struct uart_port *port) +{ + return port->type == PORT_XUARTPS ? XUARTPS_NAME : NULL; +} + +/** + * xuartps_verify_port - Verify the port params + * @port: Handle to the uart port structure + * @ser: Handle to the structure whose members are compared + * + * Returns 0 if success otherwise -EINVAL + **/ +static int xuartps_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + if (ser->type != PORT_UNKNOWN && ser->type != PORT_XUARTPS) + return -EINVAL; + if (port->irq != ser->irq) + return -EINVAL; + if (ser->io_type != UPIO_MEM) + return -EINVAL; + if (port->iobase != ser->port) + return -EINVAL; + if (ser->hub6 != 0) + return -EINVAL; + return 0; +} + +/** + * xuartps_request_port - Claim the memory region attached to xuartps port, + * called when the driver adds a xuartps port via + * uart_add_one_port() + * @port: Handle to the uart port structure + * + * Returns 0, -ENOMEM if request fails + **/ +static int xuartps_request_port(struct uart_port *port) +{ + if (!request_mem_region(port->mapbase, XUARTPS_REGISTER_SPACE, + XUARTPS_NAME)) { + return -ENOMEM; + } + + port->membase = ioremap(port->mapbase, XUARTPS_REGISTER_SPACE); + if (!port->membase) { + dev_err(port->dev, "Unable to map registers\n"); + release_mem_region(port->mapbase, XUARTPS_REGISTER_SPACE); + return -ENOMEM; + } + return 0; +} + +/** + * xuartps_release_port - Release the memory region attached to a xuartps + * port, called when the driver removes a xuartps + * port via uart_remove_one_port(). + * @port: Handle to the uart port structure + * + **/ +static void xuartps_release_port(struct uart_port *port) +{ + release_mem_region(port->mapbase, XUARTPS_REGISTER_SPACE); + iounmap(port->membase); + port->membase = NULL; +} + +/** + * xuartps_config_port - Configure xuartps, called when the driver adds a + * xuartps port + * @port: Handle to the uart port structure + * @flags: If any + * + **/ +static void xuartps_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE && xuartps_request_port(port) == 0) + port->type = PORT_XUARTPS; +} + +/** + * xuartps_get_mctrl - Get the modem control state + * + * @port: Handle to the uart port structure + * + * Returns the modem control state + * + **/ +static unsigned int xuartps_get_mctrl(struct uart_port *port) +{ + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; +} + +static void xuartps_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* N/A */ +} + +static void xuartps_enable_ms(struct uart_port *port) +{ + /* N/A */ +} + +/** The UART operations structure + */ +static struct uart_ops xuartps_ops = { + .set_mctrl = xuartps_set_mctrl, + .get_mctrl = xuartps_get_mctrl, + .enable_ms = xuartps_enable_ms, + + .start_tx = xuartps_start_tx, /* Start transmitting */ + .stop_tx = xuartps_stop_tx, /* Stop transmission */ + .stop_rx = xuartps_stop_rx, /* Stop reception */ + .tx_empty = xuartps_tx_empty, /* Transmitter busy? */ + .break_ctl = xuartps_break_ctl, /* Start/stop + * transmitting break + */ + .set_termios = xuartps_set_termios, /* Set termios */ + .startup = xuartps_startup, /* App opens xuartps */ + .shutdown = xuartps_shutdown, /* App closes xuartps */ + .type = xuartps_type, /* Set UART type */ + .verify_port = xuartps_verify_port, /* Verification of port + * params + */ + .request_port = xuartps_request_port, /* Claim resources + * associated with a + * xuartps port + */ + .release_port = xuartps_release_port, /* Release resources + * associated with a + * xuartps port + */ + .config_port = xuartps_config_port, /* Configure when driver + * adds a xuartps port + */ +}; + +static struct uart_port xuartps_port[2]; + +/** + * xuartps_get_port - Configure the port from the platform device resource + * info + * + * Returns a pointer to a uart_port or NULL for failure + **/ +static struct uart_port *xuartps_get_port(void) +{ + struct uart_port *port; + int id; + + /* Find the next unused port */ + for (id = 0; id < XUARTPS_NR_PORTS; id++) + if (xuartps_port[id].mapbase == 0) + break; + + if (id >= XUARTPS_NR_PORTS) + return NULL; + + port = &xuartps_port[id]; + + /* At this point, we've got an empty uart_port struct, initialize it */ + spin_lock_init(&port->lock); + port->membase = NULL; + port->iobase = 1; /* mark port in use */ + port->irq = 0; + port->type = PORT_UNKNOWN; + port->iotype = UPIO_MEM32; + port->flags = UPF_BOOT_AUTOCONF; + port->ops = &xuartps_ops; + port->fifosize = XUARTPS_FIFO_SIZE; + port->line = id; + port->dev = NULL; + return port; +} + +/*-----------------------Console driver operations--------------------------*/ + +#ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE +/** + * xuartps_console_wait_tx - Wait for the TX to be full + * @port: Handle to the uart port structure + * + **/ +static void xuartps_console_wait_tx(struct uart_port *port) +{ + while ((xuartps_readl(XUARTPS_SR_OFFSET) & XUARTPS_SR_TXEMPTY) + != XUARTPS_SR_TXEMPTY) + barrier(); +} + +/** + * xuartps_console_putchar - write the character to the FIFO buffer + * @port: Handle to the uart port structure + * @ch: Character to be written + * + **/ +static void xuartps_console_putchar(struct uart_port *port, int ch) +{ + xuartps_console_wait_tx(port); + xuartps_writel(ch, XUARTPS_FIFO_OFFSET); +} + +/** + * xuartps_console_write - perform write operation + * @port: Handle to the uart port structure + * @s: Pointer to character array + * @count: No of characters + **/ +static void xuartps_console_write(struct console *co, const char *s, + unsigned int count) +{ + struct uart_port *port = &xuartps_port[co->index]; + unsigned long flags; + unsigned int imr; + int locked = 1; + + if (oops_in_progress) + locked = spin_trylock_irqsave(&port->lock, flags); + else + spin_lock_irqsave(&port->lock, flags); + + /* save and disable interrupt */ + imr = xuartps_readl(XUARTPS_IMR_OFFSET); + xuartps_writel(imr, XUARTPS_IDR_OFFSET); + + uart_console_write(port, s, count, xuartps_console_putchar); + xuartps_console_wait_tx(port); + + /* restore interrupt state, it seems like there may be a h/w bug + * in that the interrupt enable register should not need to be + * written based on the data sheet + */ + xuartps_writel(~imr, XUARTPS_IDR_OFFSET); + xuartps_writel(imr, XUARTPS_IER_OFFSET); + + if (locked) + spin_unlock_irqrestore(&port->lock, flags); +} + +/** + * xuartps_console_setup - Initialize the uart to default config + * @co: Console handle + * @options: Initial settings of uart + * + * Returns 0, -ENODEV if no device + **/ +static int __init xuartps_console_setup(struct console *co, char *options) +{ + struct uart_port *port = &xuartps_port[co->index]; + int baud = 9600; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + if (co->index < 0 || co->index >= XUARTPS_NR_PORTS) + return -EINVAL; + + if (!port->mapbase) { + pr_debug("console on ttyPS%i not present\n", co->index); + return -ENODEV; + } + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +static struct uart_driver xuartps_uart_driver; + +static struct console xuartps_console = { + .name = XUARTPS_TTY_NAME, + .write = xuartps_console_write, + .device = uart_console_device, + .setup = xuartps_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, /* Specified on the cmdline (e.g. console=ttyPS ) */ + .data = &xuartps_uart_driver, +}; + +/** + * xuartps_console_init - Initialization call + * + * Returns 0 on success, negative error otherwise + **/ +static int __init xuartps_console_init(void) +{ + register_console(&xuartps_console); + return 0; +} + +console_initcall(xuartps_console_init); + +#endif /* CONFIG_SERIAL_XILINX_PS_UART_CONSOLE */ + +/** Structure Definitions + */ +static struct uart_driver xuartps_uart_driver = { + .owner = THIS_MODULE, /* Owner */ + .driver_name = XUARTPS_NAME, /* Driver name */ + .dev_name = XUARTPS_TTY_NAME, /* Node name */ + .major = XUARTPS_MAJOR, /* Major number */ + .minor = XUARTPS_MINOR, /* Minor number */ + .nr = XUARTPS_NR_PORTS, /* Number of UART ports */ +#ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE + .cons = &xuartps_console, /* Console */ +#endif +}; + +/* --------------------------------------------------------------------- + * Platform bus binding + */ +/** + * xuartps_probe - Platform driver probe + * @pdev: Pointer to the platform device structure + * + * Returns 0 on success, negative error otherwise + **/ +static int __devinit xuartps_probe(struct platform_device *pdev) +{ + int rc; + struct uart_port *port; + struct resource *res, *res2; + int clk = 0; + +#ifdef CONFIG_OF + const unsigned int *prop; + + prop = of_get_property(pdev->dev.of_node, "clock", NULL); + if (prop) + clk = be32_to_cpup(prop); +#else + clk = *((unsigned int *)(pdev->dev.platform_data)); +#endif + if (!clk) { + dev_err(&pdev->dev, "no clock specified\n"); + return -ENODEV; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res2) + return -ENODEV; + + /* Initialize the port structure */ + port = xuartps_get_port(); + + if (!port) { + dev_err(&pdev->dev, "Cannot get uart_port structure\n"); + return -ENODEV; + } else { + /* Register the port. + * This function also registers this device with the tty layer + * and triggers invocation of the config_port() entry point. + */ + port->mapbase = res->start; + port->irq = res2->start; + port->dev = &pdev->dev; + port->uartclk = clk; + dev_set_drvdata(&pdev->dev, port); + rc = uart_add_one_port(&xuartps_uart_driver, port); + if (rc) { + dev_err(&pdev->dev, + "uart_add_one_port() failed; err=%i\n", rc); + dev_set_drvdata(&pdev->dev, NULL); + return rc; + } + return 0; + } +} + +/** + * xuartps_remove - called when the platform driver is unregistered + * @pdev: Pointer to the platform device structure + * + * Returns 0 on success, negative error otherwise + **/ +static int __devexit xuartps_remove(struct platform_device *pdev) +{ + struct uart_port *port = dev_get_drvdata(&pdev->dev); + int rc = 0; + + /* Remove the xuartps port from the serial core */ + if (port) { + rc = uart_remove_one_port(&xuartps_uart_driver, port); + dev_set_drvdata(&pdev->dev, NULL); + port->mapbase = 0; + } + return rc; +} + +/** + * xuartps_suspend - suspend event + * @pdev: Pointer to the platform device structure + * @state: State of the device + * + * Returns 0 + **/ +static int xuartps_suspend(struct platform_device *pdev, pm_message_t state) +{ + /* Call the API provided in serial_core.c file which handles + * the suspend. + */ + uart_suspend_port(&xuartps_uart_driver, &xuartps_port[pdev->id]); + return 0; +} + +/** + * xuartps_resume - Resume after a previous suspend + * @pdev: Pointer to the platform device structure + * + * Returns 0 + **/ +static int xuartps_resume(struct platform_device *pdev) +{ + uart_resume_port(&xuartps_uart_driver, &xuartps_port[pdev->id]); + return 0; +} + +/* Match table for of_platform binding */ + +#ifdef CONFIG_OF +static struct of_device_id xuartps_of_match[] __devinitdata = { + { .compatible = "xlnx,xuartps", }, + {} +}; +MODULE_DEVICE_TABLE(of, xuartps_of_match); +#else +#define xuartps_of_match NULL +#endif + +static struct platform_driver xuartps_platform_driver = { + .probe = xuartps_probe, /* Probe method */ + .remove = __exit_p(xuartps_remove), /* Detach method */ + .suspend = xuartps_suspend, /* Suspend */ + .resume = xuartps_resume, /* Resume after a suspend */ + .driver = { + .owner = THIS_MODULE, + .name = XUARTPS_NAME, /* Driver name */ + .of_match_table = xuartps_of_match, + }, +}; + +/* --------------------------------------------------------------------- + * Module Init and Exit + */ +/** + * xuartps_init - Initial driver registration call + * + * Returns whether the registration was successful or not + **/ +static int __init xuartps_init(void) +{ + int retval = 0; + + /* Register the xuartps driver with the serial core */ + retval = uart_register_driver(&xuartps_uart_driver); + if (retval) + return retval; + + /* Register the platform driver */ + retval = platform_driver_register(&xuartps_platform_driver); + if (retval) + uart_unregister_driver(&xuartps_uart_driver); + + return retval; +} + +/** + * xuartps_exit - Driver unregistration call + **/ +static void __exit xuartps_exit(void) +{ + /* The order of unregistration is important. Unregister the + * UART driver before the platform driver crashes the system. + */ + + /* Unregister the platform driver */ + platform_driver_unregister(&xuartps_platform_driver); + + /* Unregister the xuartps driver */ + uart_unregister_driver(&xuartps_uart_driver); +} + +module_init(xuartps_init); +module_exit(xuartps_exit); + +MODULE_DESCRIPTION("Driver for PS UART"); +MODULE_AUTHOR("Xilinx Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 27da23d98e3f..272e417a9b0d 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/synclink.c - * * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $ * * Device driver for Microgate SyncLink ISA and PCI diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index f1a7918d71aa..46de2e075dac 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -416,6 +416,7 @@ static void flush_to_ldisc(struct work_struct *work) struct tty_buffer *head, *tail = tty->buf.tail; int seen_tail = 0; while ((head = tty->buf.head) != NULL) { + int copied; int count; char *char_buf; unsigned char *flag_buf; @@ -442,17 +443,19 @@ static void flush_to_ldisc(struct work_struct *work) line discipline as we want to empty the queue */ if (test_bit(TTY_FLUSHPENDING, &tty->flags)) break; - if (!tty->receive_room || seen_tail) - break; - if (count > tty->receive_room) - count = tty->receive_room; char_buf = head->char_buf_ptr + head->read; flag_buf = head->flag_buf_ptr + head->read; - head->read += count; spin_unlock_irqrestore(&tty->buf.lock, flags); - disc->ops->receive_buf(tty, char_buf, + copied = disc->ops->receive_buf(tty, char_buf, flag_buf, count); spin_lock_irqsave(&tty->buf.lock, flags); + + head->read += copied; + + if (copied == 0 || seen_tail) { + schedule_work(&tty->buf.work); + break; + } } clear_bit(TTY_FLUSHING, &tty->flags); } diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index d7d50b48287e..6556f7452ba6 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/tty_io.c - * * Copyright (C) 1991, 1992 Linus Torvalds */ @@ -964,12 +962,14 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count, } void tty_write_unlock(struct tty_struct *tty) + __releases(&tty->atomic_write_lock) { mutex_unlock(&tty->atomic_write_lock); wake_up_interruptible_poll(&tty->write_wait, POLLOUT); } int tty_write_lock(struct tty_struct *tty, int ndelay) + __acquires(&tty->atomic_write_lock) { if (!mutex_trylock(&tty->atomic_write_lock)) { if (ndelay) @@ -1391,16 +1391,15 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, return ERR_PTR(-ENODEV); tty = alloc_tty_struct(); - if (!tty) - goto fail_no_mem; + if (!tty) { + retval = -ENOMEM; + goto err_module_put; + } initialize_tty_struct(tty, driver, idx); retval = tty_driver_install_tty(driver, tty); - if (retval < 0) { - free_tty_struct(tty); - module_put(driver->owner); - return ERR_PTR(retval); - } + if (retval < 0) + goto err_deinit_tty; /* * Structures all installed ... call the ldisc open routines. @@ -1409,15 +1408,18 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, */ retval = tty_ldisc_setup(tty, tty->link); if (retval) - goto release_mem_out; + goto err_release_tty; return tty; -fail_no_mem: +err_deinit_tty: + deinitialize_tty_struct(tty); + free_tty_struct(tty); +err_module_put: module_put(driver->owner); - return ERR_PTR(-ENOMEM); + return ERR_PTR(retval); /* call the tty release_tty routine to clean out this slot */ -release_mem_out: +err_release_tty: if (printk_ratelimit()) printk(KERN_INFO "tty_init_dev: ldisc open failed, " "clearing slot %d\n", idx); @@ -1892,6 +1894,7 @@ got_driver: retval = tty_add_file(tty, filp); if (retval) { tty_unlock(); + tty_release(inode, filp); return retval; } @@ -1902,12 +1905,10 @@ got_driver: #ifdef TTY_DEBUG_HANGUP printk(KERN_DEBUG "opening %s...", tty->name); #endif - if (!retval) { - if (tty->ops->open) - retval = tty->ops->open(tty, filp); - else - retval = -ENODEV; - } + if (tty->ops->open) + retval = tty->ops->open(tty, filp); + else + retval = -ENODEV; filp->f_flags = saved_flags; if (!retval && test_bit(TTY_EXCLUSIVE, &tty->flags) && @@ -2888,6 +2889,20 @@ void initialize_tty_struct(struct tty_struct *tty, } /** + * deinitialize_tty_struct + * @tty: tty to deinitialize + * + * This subroutine deinitializes a tty structure that has been newly + * allocated but tty_release cannot be called on that yet. + * + * Locking: none - tty in question must not be exposed at this point + */ +void deinitialize_tty_struct(struct tty_struct *tty) +{ + tty_ldisc_deinit(tty); +} + +/** * tty_put_char - write one character to a tty * @tty: tty * @ch: character diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index 620c971422b6..53f2442c6099 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/tty_ioctl.c - * * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds * * Modified by Fred N. van Kempen, 01/29/93, to add line disciplines diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index e19e13647116..5d01d32e2cf0 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -956,6 +956,19 @@ void tty_ldisc_init(struct tty_struct *tty) tty_ldisc_assign(tty, ld); } +/** + * tty_ldisc_init - ldisc cleanup for new tty + * @tty: tty that was allocated recently + * + * The tty structure must not becompletely set up (tty_ldisc_setup) when + * this call is made. + */ +void tty_ldisc_deinit(struct tty_struct *tty) +{ + put_ldisc(tty->ldisc); + tty_ldisc_assign(tty, NULL); +} + void tty_ldisc_begin(void) { /* Setup the default TTY line discipline. */ diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 133697540c73..3b2bb7719442 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -1,6 +1,3 @@ -/* - * drivers/char/tty_lock.c - */ #include <linux/tty.h> #include <linux/module.h> #include <linux/kallsyms.h> diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index d6b342b5b423..3761ccf0f340 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/keyboard.c - * * Written for linux by Johan Myreen as a translation from * the assembly version by Linus (with diacriticals added) * diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c index adf0ad2a8851..67b1d0d7c8ac 100644 --- a/drivers/tty/vt/selection.c +++ b/drivers/tty/vt/selection.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/selection.c - * * This module exports the functions: * * 'int set_selection(struct tiocl_selection __user *, struct tty_struct *)' @@ -334,8 +332,7 @@ int paste_selection(struct tty_struct *tty) continue; } count = sel_buffer_lth - pasted; - count = min(count, tty->receive_room); - tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted, + count = tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted, NULL, count); pasted += count; } diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c index 1564261e80c8..66825c9f516a 100644 --- a/drivers/tty/vt/vc_screen.c +++ b/drivers/tty/vt/vc_screen.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/vc_screen.c - * * Provide access to virtual console memory. * /dev/vcs0: the screen as it is being viewed right now (possibly scrolled) * /dev/vcsN: the screen of /dev/ttyN (1 <= N <= 63) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 4bea1efaec98..b3915b7ad3e2 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/vt.c - * * Copyright (C) 1991, 1992 Linus Torvalds */ @@ -858,7 +856,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, { unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; unsigned long end; - unsigned int old_cols, old_rows, old_row_size, old_screen_size; + unsigned int old_rows, old_row_size; unsigned int new_cols, new_rows, new_row_size, new_screen_size; unsigned int user; unsigned short *newscreen; @@ -887,9 +885,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, return -ENOMEM; old_rows = vc->vc_rows; - old_cols = vc->vc_cols; old_row_size = vc->vc_size_row; - old_screen_size = vc->vc_screenbuf_size; err = resize_screen(vc, new_cols, new_rows, user); if (err) { @@ -1197,6 +1193,13 @@ static void csi_J(struct vc_data *vc, int vpar) vc->vc_x + 1); } break; + case 3: /* erase scroll-back buffer (and whole display) */ + scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, + vc->vc_screenbuf_size >> 1); + set_origin(vc); + if (CON_IS_VISIBLE(vc)) + update_screen(vc); + /* fall through */ case 2: /* erase whole display */ count = vc->vc_cols * vc->vc_rows; start = (unsigned short *)vc->vc_origin; diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c index 937d17219984..5e096f43bcea 100644 --- a/drivers/tty/vt/vt_ioctl.c +++ b/drivers/tty/vt/vt_ioctl.c @@ -1,6 +1,4 @@ /* - * linux/drivers/char/vt_ioctl.c - * * Copyright (C) 1992 obz under the linux copyright * * Dynamic diacritical handling - aeb@cwi.nl - Dec 1993 @@ -698,10 +696,23 @@ int vt_ioctl(struct tty_struct *tty, break; case KDGKBMODE: - uival = ((kbd->kbdmode == VC_RAW) ? K_RAW : - (kbd->kbdmode == VC_MEDIUMRAW) ? K_MEDIUMRAW : - (kbd->kbdmode == VC_UNICODE) ? K_UNICODE : - K_XLATE); + switch (kbd->kbdmode) { + case VC_RAW: + uival = K_RAW; + break; + case VC_MEDIUMRAW: + uival = K_MEDIUMRAW; + break; + case VC_UNICODE: + uival = K_UNICODE; + break; + case VC_OFF: + uival = K_OFF; + break; + default: + uival = K_XLATE; + break; + } goto setint; /* this could be folded into KDSKBMODE, but for compatibility @@ -1499,7 +1510,6 @@ long vt_compat_ioctl(struct tty_struct *tty, { struct vc_data *vc = tty->driver_data; struct console_font_op op; /* used in multiple places here */ - struct kbd_struct *kbd; unsigned int console; void __user *up = (void __user *)arg; int perm; @@ -1522,7 +1532,6 @@ long vt_compat_ioctl(struct tty_struct *tty, if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) perm = 1; - kbd = kbd_table + console; switch (cmd) { /* * these need special handlers for incompatible data structures diff --git a/fs/exec.c b/fs/exec.c index c016896dcbb2..c1cf372f17a7 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1051,6 +1051,7 @@ char *get_task_comm(char *buf, struct task_struct *tsk) task_unlock(tsk); return buf; } +EXPORT_SYMBOL_GPL(get_task_comm); void set_task_comm(struct task_struct *tsk, char *buf) { diff --git a/include/linux/pti.h b/include/linux/pti.h new file mode 100644 index 000000000000..81af667bb2d5 --- /dev/null +++ b/include/linux/pti.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) Intel 2011 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * The PTI (Parallel Trace Interface) driver directs trace data routed from + * various parts in the system out through the Intel Penwell PTI port and + * out of the mobile device for analysis with a debugging tool + * (Lauterbach, Fido). This is part of a solution for the MIPI P1149.7, + * compact JTAG, standard. + * + * This header file will allow other parts of the OS to use the + * interface to write out it's contents for debugging a mobile system. + */ + +#ifndef PTI_H_ +#define PTI_H_ + +/* offset for last dword of any PTI message. Part of MIPI P1149.7 */ +#define PTI_LASTDWORD_DTS 0x30 + +/* basic structure used as a write address to the PTI HW */ +struct pti_masterchannel { + u8 master; + u8 channel; +}; + +/* the following functions are defined in misc/pti.c */ +void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count); +struct pti_masterchannel *pti_request_masterchannel(u8 type); +void pti_release_masterchannel(struct pti_masterchannel *mc); + +#endif /*PTI_H_*/ diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 758c5b0c6fd3..a5c31146a337 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -45,7 +45,8 @@ #define PORT_OCTEON 17 /* Cavium OCTEON internal UART */ #define PORT_AR7 18 /* Texas Instruments AR7 internal UART */ #define PORT_U6_16550A 19 /* ST-Ericsson U6xxx internal UART */ -#define PORT_MAX_8250 19 /* max port ID */ +#define PORT_TEGRA 20 /* NVIDIA Tegra internal UART */ +#define PORT_MAX_8250 20 /* max port ID */ /* * ARM specific type numbers. These are not currently guaranteed @@ -202,6 +203,9 @@ /* VIA VT8500 SoC */ #define PORT_VT8500 97 +/* Xilinx PSS UART */ +#define PORT_XUARTPS 98 + #ifdef __KERNEL__ #include <linux/compiler.h> diff --git a/include/linux/serial_reg.h b/include/linux/serial_reg.h index 3ecb71a9e505..c75bda37c18e 100644 --- a/include/linux/serial_reg.h +++ b/include/linux/serial_reg.h @@ -57,6 +57,7 @@ * ST16C654: 8 16 56 60 8 16 32 56 PORT_16654 * TI16C750: 1 16 32 56 xx xx xx xx PORT_16750 * TI16C752: 8 16 56 60 8 16 32 56 + * Tegra: 1 4 8 14 16 8 4 1 PORT_TEGRA */ #define UART_FCR_R_TRIG_00 0x00 #define UART_FCR_R_TRIG_01 0x40 @@ -118,6 +119,7 @@ #define UART_MCR_DTR 0x01 /* DTR complement */ #define UART_LSR 5 /* In: Line Status Register */ +#define UART_LSR_FIFOE 0x80 /* Fifo error */ #define UART_LSR_TEMT 0x40 /* Transmitter empty */ #define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ #define UART_LSR_BI 0x10 /* Break interrupt indicator */ diff --git a/include/linux/tty.h b/include/linux/tty.h index 9f469c700550..d6f05292e456 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -50,6 +50,8 @@ #define N_CAIF 20 /* CAIF protocol for talking to modems */ #define N_GSM0710 21 /* GSM 0710 Mux */ #define N_TI_WL 22 /* for TI's WL BT, FM, GPS combo chips */ +#define N_TRACESINK 23 /* Trace data routing for MIPI P1149.7 */ +#define N_TRACEROUTER 24 /* Trace data routing for MIPI P1149.7 */ /* * This character is the same as _POSIX_VDISABLE: it cannot be used as @@ -472,6 +474,7 @@ extern int tty_add_file(struct tty_struct *tty, struct file *file); extern void free_tty_struct(struct tty_struct *tty); extern void initialize_tty_struct(struct tty_struct *tty, struct tty_driver *driver, int idx); +extern void deinitialize_tty_struct(struct tty_struct *tty); extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, int first_ok); extern int tty_release(struct inode *inode, struct file *filp); @@ -525,6 +528,7 @@ extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); extern void tty_ldisc_init(struct tty_struct *tty); +extern void tty_ldisc_deinit(struct tty_struct *tty); extern void tty_ldisc_begin(void); /* This last one is just for the tty layer internals and shouldn't be used elsewhere */ extern void tty_ldisc_enable(struct tty_struct *tty); diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index ff7dc08696a8..5b07792ccb46 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -76,7 +76,7 @@ * tty device. It is solely the responsibility of the line * discipline to handle poll requests. * - * void (*receive_buf)(struct tty_struct *, const unsigned char *cp, + * unsigned int (*receive_buf)(struct tty_struct *, const unsigned char *cp, * char *fp, int count); * * This function is called by the low-level tty driver to send @@ -84,7 +84,8 @@ * processing. <cp> is a pointer to the buffer of input * character received by the device. <fp> is a pointer to a * pointer of flag bytes which indicate whether a character was - * received with a parity error, etc. + * received with a parity error, etc. Returns the amount of bytes + * received. * * void (*write_wakeup)(struct tty_struct *); * @@ -140,8 +141,8 @@ struct tty_ldisc_ops { /* * The following routines are called from below. */ - void (*receive_buf)(struct tty_struct *, const unsigned char *cp, - char *fp, int count); + unsigned int (*receive_buf)(struct tty_struct *, + const unsigned char *cp, char *fp, int count); void (*write_wakeup)(struct tty_struct *); void (*dcd_change)(struct tty_struct *, unsigned int, struct pps_event_time *); diff --git a/sound/soc/codecs/cx20442.c b/sound/soc/codecs/cx20442.c index d68ea532cc7f..f8c663dcff02 100644 --- a/sound/soc/codecs/cx20442.c +++ b/sound/soc/codecs/cx20442.c @@ -262,14 +262,14 @@ static int v253_hangup(struct tty_struct *tty) } /* Line discipline .receive_buf() */ -static void v253_receive(struct tty_struct *tty, - const unsigned char *cp, char *fp, int count) +static unsigned int v253_receive(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) { struct snd_soc_codec *codec = tty->disc_data; struct cx20442_priv *cx20442; if (!codec) - return; + return count; cx20442 = snd_soc_codec_get_drvdata(codec); @@ -281,6 +281,8 @@ static void v253_receive(struct tty_struct *tty, codec->hw_write = (hw_write_t)tty->ops->write; codec->card->pop_time = 1; } + + return count; } /* Line discipline .write_wakeup() */ |