diff options
Diffstat (limited to 'arch/mips/pmc-sierra')
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/Makefile | 8 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c | 171 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.h | 69 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/dbg_io.c | 180 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/ht-irq.c | 53 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/ht.c | 454 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/i2c-yosemite.c | 188 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/i2c-yosemite.h | 96 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/irq-handler.S | 93 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/irq.c | 167 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/prom.c | 141 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/py-console.c | 114 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/setup.c | 235 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/setup.h | 32 | ||||
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/smp.c | 172 |
15 files changed, 2173 insertions, 0 deletions
diff --git a/arch/mips/pmc-sierra/yosemite/Makefile b/arch/mips/pmc-sierra/yosemite/Makefile new file mode 100644 index 000000000000..ae96a71a3089 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for the PMC-Sierra Titan +# + +obj-y += irq-handler.o irq.o i2c-yosemite.o prom.o py-console.o setup.o + +obj-$(CONFIG_KGDB) += dbg_io.o +obj-$(CONFIG_SMP) += smp.o diff --git a/arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c b/arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c new file mode 100644 index 000000000000..b067988614c3 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c @@ -0,0 +1,171 @@ +/* + * arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c + * + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * Description: + * + * This code reads the ATMEL 24CXX EEPROM. The PMC-Sierra Yosemite board uses the ATMEL + * 24C32/24C64 which uses two byte addressing as compared to 24C16. Note that this program + * uses the serial port like /dev/ttyS0, to communicate with the EEPROM. Hence, you are + * expected to have a connectivity from the EEPROM to the serial port. This program does + * __not__ communicate using the I2C protocol + */ + +#include "atmel_read_eeprom.h" + +static void delay(int delay) +{ + while (delay--); +} + +static void send_bit(unsigned char bit) +{ + scl_lo; + delay(TXX); + if (bit) + sda_hi; + else + sda_lo; + + delay(TXX); + scl_hi; + delay(TXX); +} + +static void send_ack(void) +{ + send_bit(0); +} + +static void send_byte(unsigned char byte) +{ + int i = 0; + + for (i = 7; i >= 0; i--) + send_bit((byte >> i) & 0x01); +} + +static void send_start(void) +{ + sda_hi; + delay(TXX); + scl_hi; + delay(TXX); + sda_lo; + delay(TXX); +} + +static void send_stop(void) +{ + sda_lo; + delay(TXX); + scl_hi; + delay(TXX); + sda_hi; + delay(TXX); +} + +static void do_idle(void) +{ + sda_hi; + scl_hi; + vcc_off; +} + +static int recv_bit(void) +{ + int status; + + scl_lo; + delay(TXX); + sda_hi; + delay(TXX); + scl_hi; + delay(TXX); + + return 1; +} + +static unsigned char recv_byte(void) { + int i; + unsigned char byte=0; + + for (i=7;i>=0;i--) + byte |= (recv_bit() << i); + + return byte; +} + +static int recv_ack(void) +{ + unsigned int ack; + + ack = (unsigned int)recv_bit(); + scl_lo; + + if (ack) { + do_idle(); + printk(KERN_ERR "Error reading the Atmel 24C32/24C64 EEPROM \n"); + return -1; + } + + return ack; +} + +/* + * This function does the actual read of the EEPROM. It needs the buffer into which the + * read data is copied, the size of the EEPROM being read and the buffer size + */ +int read_eeprom(char *buffer, int eeprom_size, int size) +{ + int i = 0, err; + + send_start(); + send_byte(W_HEADER); + recv_ack(); + + /* EEPROM with size of more then 2K need two byte addressing */ + if (eeprom_size > 2048) { + send_byte(0x00); + recv_ack(); + } + + send_start(); + send_byte(R_HEADER); + err = recv_ack(); + if (err == -1) + return err; + + for (i = 0; i < size; i++) { + *buffer++ = recv_byte(); + send_ack(); + } + + /* Note : We should do some check if the buffer contains correct information */ + + send_stop(); +} diff --git a/arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.h b/arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.h new file mode 100644 index 000000000000..d27566d99ffc --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.h @@ -0,0 +1,69 @@ +/* + * arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c + * + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * Header file for atmel_read_eeprom.c + */ + +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/version.h> +#include <asm/pci.h> +#include <asm/io.h> +#include <linux/init.h> +#include <asm/termios.h> +#include <asm/ioctls.h> +#include <linux/ioctl.h> +#include <linux/fcntl.h> + +#define DEFAULT_PORT "/dev/ttyS0" /* Port to open */ +#define TXX 0 /* Dummy loop for spinning */ + +#define BLOCK_SEL 0x00 +#define SLAVE_ADDR 0xa0 +#define READ_BIT 0x01 +#define WRITE_BIT 0x00 +#define R_HEADER SLAVE_ADDR + BLOCK_SEL + READ_BIT +#define W_HEADER SLAVE_ADDR + BLOCK_SEL + WRITE_BIT + +/* + * Clock, Voltages and Data + */ +#define vcc_off (ioctl(fd, TIOCSBRK, 0)) +#define vcc_on (ioctl(fd, TIOCCBRK, 0)) +#define sda_hi (ioctl(fd, TIOCMBIS, &dtr)) +#define sda_lo (ioctl(fd, TIOCMBIC, &dtr)) +#define scl_lo (ioctl(fd, TIOCMBIC, &rts)) +#define scl_hi (ioctl(fd, TIOCMBIS, &rts)) + +const char rts = TIOCM_RTS; +const char dtr = TIOCM_DTR; +int fd; + diff --git a/arch/mips/pmc-sierra/yosemite/dbg_io.c b/arch/mips/pmc-sierra/yosemite/dbg_io.c new file mode 100644 index 000000000000..0f659c9106ac --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/dbg_io.c @@ -0,0 +1,180 @@ +/* + * Copyright 2003 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * Support for KGDB for the Yosemite board. We make use of single serial + * port to be used for KGDB as well as console. The second serial port + * seems to be having a problem. Single IRQ is allocated for both the + * ports. Hence, the interrupt routing code needs to figure out whether + * the interrupt came from channel A or B. + */ + +#include <asm/serial.h> + +/* + * Baud rate, Parity, Data and Stop bit settings for the + * serial port on the Yosemite. Note that the Early printk + * patch has been added. So, we should be all set to go + */ +#define YOSEMITE_BAUD_2400 2400 +#define YOSEMITE_BAUD_4800 4800 +#define YOSEMITE_BAUD_9600 9600 +#define YOSEMITE_BAUD_19200 19200 +#define YOSEMITE_BAUD_38400 38400 +#define YOSEMITE_BAUD_57600 57600 +#define YOSEMITE_BAUD_115200 115200 + +#define YOSEMITE_PARITY_NONE 0 +#define YOSEMITE_PARITY_ODD 0x08 +#define YOSEMITE_PARITY_EVEN 0x18 +#define YOSEMITE_PARITY_MARK 0x28 +#define YOSEMITE_PARITY_SPACE 0x38 + +#define YOSEMITE_DATA_5BIT 0x0 +#define YOSEMITE_DATA_6BIT 0x1 +#define YOSEMITE_DATA_7BIT 0x2 +#define YOSEMITE_DATA_8BIT 0x3 + +#define YOSEMITE_STOP_1BIT 0x0 +#define YOSEMITE_STOP_2BIT 0x4 + +/* This is crucial */ +#define SERIAL_REG_OFS 0x1 + +#define SERIAL_RCV_BUFFER 0x0 +#define SERIAL_TRANS_HOLD 0x0 +#define SERIAL_SEND_BUFFER 0x0 +#define SERIAL_INTR_ENABLE (1 * SERIAL_REG_OFS) +#define SERIAL_INTR_ID (2 * SERIAL_REG_OFS) +#define SERIAL_DATA_FORMAT (3 * SERIAL_REG_OFS) +#define SERIAL_LINE_CONTROL (3 * SERIAL_REG_OFS) +#define SERIAL_MODEM_CONTROL (4 * SERIAL_REG_OFS) +#define SERIAL_RS232_OUTPUT (4 * SERIAL_REG_OFS) +#define SERIAL_LINE_STATUS (5 * SERIAL_REG_OFS) +#define SERIAL_MODEM_STATUS (6 * SERIAL_REG_OFS) +#define SERIAL_RS232_INPUT (6 * SERIAL_REG_OFS) +#define SERIAL_SCRATCH_PAD (7 * SERIAL_REG_OFS) + +#define SERIAL_DIVISOR_LSB (0 * SERIAL_REG_OFS) +#define SERIAL_DIVISOR_MSB (1 * SERIAL_REG_OFS) + +/* + * Functions to READ and WRITE to serial port 0 + */ +#define SERIAL_READ(ofs) (*((volatile unsigned char*) \ + (TITAN_SERIAL_BASE + ofs))) + +#define SERIAL_WRITE(ofs, val) ((*((volatile unsigned char*) \ + (TITAN_SERIAL_BASE + ofs))) = val) + +/* + * Functions to READ and WRITE to serial port 1 + */ +#define SERIAL_READ_1(ofs) (*((volatile unsigned char*) \ + (TITAN_SERIAL_BASE_1 + ofs) + +#define SERIAL_WRITE_1(ofs, val) ((*((volatile unsigned char*) \ + (TITAN_SERIAL_BASE_1 + ofs))) = val) + +/* + * Second serial port initialization + */ +void init_second_port(void) +{ + /* Disable Interrupts */ + SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x0); + SERIAL_WRITE_1(SERIAL_INTR_ENABLE, 0x0); + + { + unsigned int divisor; + + SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x80); + divisor = TITAN_SERIAL_BASE_BAUD / YOSEMITE_BAUD_115200; + SERIAL_WRITE_1(SERIAL_DIVISOR_LSB, divisor & 0xff); + + SERIAL_WRITE_1(SERIAL_DIVISOR_MSB, + (divisor & 0xff00) >> 8); + SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x0); + } + + SERIAL_WRITE_1(SERIAL_DATA_FORMAT, YOSEMITE_DATA_8BIT | + YOSEMITE_PARITY_NONE | YOSEMITE_STOP_1BIT); + + /* Enable Interrupts */ + SERIAL_WRITE_1(SERIAL_INTR_ENABLE, 0xf); +} + +/* Initialize the serial port for KGDB debugging */ +void debugInit(unsigned int baud, unsigned char data, unsigned char parity, + unsigned char stop) +{ + /* Disable Interrupts */ + SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x0); + SERIAL_WRITE(SERIAL_INTR_ENABLE, 0x0); + + { + unsigned int divisor; + + SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x80); + + divisor = TITAN_SERIAL_BASE_BAUD / baud; + SERIAL_WRITE(SERIAL_DIVISOR_LSB, divisor & 0xff); + + SERIAL_WRITE(SERIAL_DIVISOR_MSB, (divisor & 0xff00) >> 8); + SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x0); + } + + SERIAL_WRITE(SERIAL_DATA_FORMAT, data | parity | stop); +} + +static int remoteDebugInitialized = 0; + +unsigned char getDebugChar(void) +{ + if (!remoteDebugInitialized) { + remoteDebugInitialized = 1; + debugInit(YOSEMITE_BAUD_115200, + YOSEMITE_DATA_8BIT, + YOSEMITE_PARITY_NONE, YOSEMITE_STOP_1BIT); + } + + while ((SERIAL_READ(SERIAL_LINE_STATUS) & 0x1) == 0); + return SERIAL_READ(SERIAL_RCV_BUFFER); +} + +int putDebugChar(unsigned char byte) +{ + if (!remoteDebugInitialized) { + remoteDebugInitialized = 1; + debugInit(YOSEMITE_BAUD_115200, + YOSEMITE_DATA_8BIT, + YOSEMITE_PARITY_NONE, YOSEMITE_STOP_1BIT); + } + + while ((SERIAL_READ(SERIAL_LINE_STATUS) & 0x20) == 0); + SERIAL_WRITE(SERIAL_SEND_BUFFER, byte); + + return 1; +} diff --git a/arch/mips/pmc-sierra/yosemite/ht-irq.c b/arch/mips/pmc-sierra/yosemite/ht-irq.c new file mode 100644 index 000000000000..d22c9ffe4914 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/ht-irq.c @@ -0,0 +1,53 @@ +/* + * Copyright 2003 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/init.h> +#include <asm/pci.h> + +/* + * HT Bus fixup for the Titan + * XXX IRQ values need to change based on the board layout + */ +void __init titan_ht_pcibios_fixup_bus(struct pci_bus *bus) +{ + struct pci_bus *current_bus = bus; + struct pci_dev *devices; + struct list_head *devices_link; + + list_for_each(devices_link, &(current_bus->devices)) { + devices = pci_dev_b(devices_link); + if (devices == NULL) + continue; + } + + /* + * PLX and SPKT related changes go here + */ + +} diff --git a/arch/mips/pmc-sierra/yosemite/ht.c b/arch/mips/pmc-sierra/yosemite/ht.c new file mode 100644 index 000000000000..dad228d3a220 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/ht.c @@ -0,0 +1,454 @@ +/* + * Copyright 2003 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/version.h> +#include <asm/pci.h> +#include <asm/io.h> + +#include <linux/init.h> +#include <asm/titan_dep.h> + +#ifdef CONFIG_HYPERTRANSPORT + + +/* + * This function check if the Hypertransport Link Initialization completed. If + * it did, then proceed further with scanning bus #2 + */ +static __inline__ int check_titan_htlink(void) +{ + u32 val; + + val = *(volatile uint32_t *)(RM9000x2_HTLINK_REG); + if (val & 0x00000020) + /* HT Link Initialization completed */ + return 1; + else + return 0; +} + +static int titan_ht_config_read_dword(struct pci_dev *device, + int offset, u32* val) +{ + int dev, bus, func; + uint32_t address_reg, data_reg; + uint32_t address; + + bus = device->bus->number; + dev = PCI_SLOT(device->devfn); + func = PCI_FUNC(device->devfn); + + /* XXX Need to change the Bus # */ + if (bus > 2) + address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) | + 0x80000000 | 0x1; + else + address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000; + + address_reg = RM9000x2_OCD_HTCFGA; + data_reg = RM9000x2_OCD_HTCFGD; + + RM9K_WRITE(address_reg, address); + RM9K_READ(data_reg, val); + + return PCIBIOS_SUCCESSFUL; +} + + +static int titan_ht_config_read_word(struct pci_dev *device, + int offset, u16* val) +{ + int dev, bus, func; + uint32_t address_reg, data_reg; + uint32_t address; + + bus = device->bus->number; + dev = PCI_SLOT(device->devfn); + func = PCI_FUNC(device->devfn); + + /* XXX Need to change the Bus # */ + if (bus > 2) + address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) | + 0x80000000 | 0x1; + else + address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000; + + address_reg = RM9000x2_OCD_HTCFGA; + data_reg = RM9000x2_OCD_HTCFGD; + + if ((offset & 0x3) == 0) + offset = 0x2; + else + offset = 0x0; + + RM9K_WRITE(address_reg, address); + RM9K_READ_16(data_reg + offset, val); + + return PCIBIOS_SUCCESSFUL; +} + + +u32 longswap(unsigned long l) +{ + unsigned char b1,b2,b3,b4; + + b1 = l&255; + b2 = (l>>8)&255; + b3 = (l>>16)&255; + b4 = (l>>24)&255; + + return ((b1<<24) + (b2<<16) + (b3<<8) + b4); +} + + +static int titan_ht_config_read_byte(struct pci_dev *device, + int offset, u8* val) +{ + int dev, bus, func; + uint32_t address_reg, data_reg; + uint32_t address; + int offset1; + + bus = device->bus->number; + dev = PCI_SLOT(device->devfn); + func = PCI_FUNC(device->devfn); + + /* XXX Need to change the Bus # */ + if (bus > 2) + address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) | + 0x80000000 | 0x1; + else + address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000; + + address_reg = RM9000x2_OCD_HTCFGA; + data_reg = RM9000x2_OCD_HTCFGD; + + RM9K_WRITE(address_reg, address); + + if ((offset & 0x3) == 0) { + offset1 = 0x3; + } + if ((offset & 0x3) == 1) { + offset1 = 0x2; + } + if ((offset & 0x3) == 2) { + offset1 = 0x1; + } + if ((offset & 0x3) == 3) { + offset1 = 0x0; + } + RM9K_READ_8(data_reg + offset1, val); + + return PCIBIOS_SUCCESSFUL; +} + + +static int titan_ht_config_write_dword(struct pci_dev *device, + int offset, u8 val) +{ + int dev, bus, func; + uint32_t address_reg, data_reg; + uint32_t address; + + bus = device->bus->number; + dev = PCI_SLOT(device->devfn); + func = PCI_FUNC(device->devfn); + + /* XXX Need to change the Bus # */ + if (bus > 2) + address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) | + 0x80000000 | 0x1; + else + address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000; + + address_reg = RM9000x2_OCD_HTCFGA; + data_reg = RM9000x2_OCD_HTCFGD; + + RM9K_WRITE(address_reg, address); + RM9K_WRITE(data_reg, val); + + return PCIBIOS_SUCCESSFUL; +} + +static int titan_ht_config_write_word(struct pci_dev *device, + int offset, u8 val) +{ + int dev, bus, func; + uint32_t address_reg, data_reg; + uint32_t address; + + bus = device->bus->number; + dev = PCI_SLOT(device->devfn); + func = PCI_FUNC(device->devfn); + + /* XXX Need to change the Bus # */ + if (bus > 2) + address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) | + 0x80000000 | 0x1; + else + address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000; + + address_reg = RM9000x2_OCD_HTCFGA; + data_reg = RM9000x2_OCD_HTCFGD; + + if ((offset & 0x3) == 0) + offset = 0x2; + else + offset = 0x0; + + RM9K_WRITE(address_reg, address); + RM9K_WRITE_16(data_reg + offset, val); + + return PCIBIOS_SUCCESSFUL; +} + +static int titan_ht_config_write_byte(struct pci_dev *device, + int offset, u8 val) +{ + int dev, bus, func; + uint32_t address_reg, data_reg; + uint32_t address; + int offset1; + + bus = device->bus->number; + dev = PCI_SLOT(device->devfn); + func = PCI_FUNC(device->devfn); + + /* XXX Need to change the Bus # */ + if (bus > 2) + address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) | + 0x80000000 | 0x1; + else + address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000; + + address_reg = RM9000x2_OCD_HTCFGA; + data_reg = RM9000x2_OCD_HTCFGD; + + RM9K_WRITE(address_reg, address); + + if ((offset & 0x3) == 0) { + offset1 = 0x3; + } + if ((offset & 0x3) == 1) { + offset1 = 0x2; + } + if ((offset & 0x3) == 2) { + offset1 = 0x1; + } + if ((offset & 0x3) == 3) { + offset1 = 0x0; + } + + RM9K_WRITE_8(data_reg + offset1, val); + return PCIBIOS_SUCCESSFUL; +} + + +static void titan_pcibios_set_master(struct pci_dev *dev) +{ + u16 cmd; + int bus = dev->bus->number; + + if (check_titan_htlink()) + titan_ht_config_read_word(dev, PCI_COMMAND, &cmd); + + cmd |= PCI_COMMAND_MASTER; + + if (check_titan_htlink()) + titan_ht_config_write_word(dev, PCI_COMMAND, cmd); +} + + +int pcibios_enable_resources(struct pci_dev *dev) +{ + u16 cmd, old_cmd; + u8 tmp1; + int idx; + struct resource *r; + int bus = dev->bus->number; + + if (check_titan_htlink()) + titan_ht_config_read_word(dev, PCI_COMMAND, &cmd); + + old_cmd = cmd; + for (idx = 0; idx < 6; idx++) { + r = &dev->resource[idx]; + if (!r->start && r->end) { + printk(KERN_ERR + "PCI: Device %s not available because of " + "resource collisions\n", pci_name(dev)); + return -EINVAL; + } + if (r->flags & IORESOURCE_IO) + cmd |= PCI_COMMAND_IO; + if (r->flags & IORESOURCE_MEM) + cmd |= PCI_COMMAND_MEMORY; + } + if (cmd != old_cmd) { + if (check_titan_htlink()) + titan_ht_config_write_word(dev, PCI_COMMAND, cmd); + } + + if (check_titan_htlink()) + titan_ht_config_read_byte(dev, PCI_CACHE_LINE_SIZE, &tmp1); + + if (tmp1 != 8) { + printk(KERN_WARNING "PCI setting cache line size to 8 from " + "%d\n", tmp1); + } + + if (check_titan_htlink()) + titan_ht_config_write_byte(dev, PCI_CACHE_LINE_SIZE, 8); + + if (check_titan_htlink()) + titan_ht_config_read_byte(dev, PCI_LATENCY_TIMER, &tmp1); + + if (tmp1 < 32 || tmp1 == 0xff) { + printk(KERN_WARNING "PCI setting latency timer to 32 from %d\n", + tmp1); + } + + if (check_titan_htlink()) + titan_ht_config_write_byte(dev, PCI_LATENCY_TIMER, 32); + + return 0; +} + + +int pcibios_enable_device(struct pci_dev *dev, int mask) +{ + return pcibios_enable_resources(dev); +} + + + +void pcibios_update_resource(struct pci_dev *dev, struct resource *root, + struct resource *res, int resource) +{ + u32 new, check; + int reg; + + return; + + new = res->start | (res->flags & PCI_REGION_FLAG_MASK); + if (resource < 6) { + reg = PCI_BASE_ADDRESS_0 + 4 * resource; + } else if (resource == PCI_ROM_RESOURCE) { + res->flags |= IORESOURCE_ROM_ENABLE; + reg = dev->rom_base_reg; + } else { + /* + * Somebody might have asked allocation of a non-standard + * resource + */ + return; + } + + pci_write_config_dword(dev, reg, new); + pci_read_config_dword(dev, reg, &check); + if ((new ^ check) & + ((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK : + PCI_BASE_ADDRESS_MEM_MASK)) { + printk(KERN_ERR "PCI: Error while updating region " + "%s/%d (%08x != %08x)\n", pci_name(dev), resource, + new, check); + } +} + + +void pcibios_align_resource(void *data, struct resource *res, + unsigned long size, unsigned long align) +{ + struct pci_dev *dev = data; + + if (res->flags & IORESOURCE_IO) { + unsigned long start = res->start; + + /* We need to avoid collisions with `mirrored' VGA ports + and other strange ISA hardware, so we always want the + addresses kilobyte aligned. */ + if (size > 0x100) { + printk(KERN_ERR "PCI: I/O Region %s/%d too large" + " (%ld bytes)\n", pci_name(dev), + dev->resource - res, size); + } + + start = (start + 1024 - 1) & ~(1024 - 1); + res->start = start; + } +} + +struct pci_ops titan_pci_ops = { + titan_ht_config_read_byte, + titan_ht_config_read_word, + titan_ht_config_read_dword, + titan_ht_config_write_byte, + titan_ht_config_write_word, + titan_ht_config_write_dword +}; + +void __init pcibios_fixup_bus(struct pci_bus *c) +{ + titan_ht_pcibios_fixup_bus(c); +} + +void __init pcibios_init(void) +{ + + /* Reset PCI I/O and PCI MEM values */ + /* XXX Need to add the proper values here */ + ioport_resource.start = 0xe0000000; + ioport_resource.end = 0xe0000000 + 0x20000000 - 1; + iomem_resource.start = 0xc0000000; + iomem_resource.end = 0xc0000000 + 0x20000000 - 1; + + /* XXX Need to add bus values */ + pci_scan_bus(2, &titan_pci_ops, NULL); + pci_scan_bus(3, &titan_pci_ops, NULL); +} + +/* + * for parsing "pci=" kernel boot arguments. + */ +char *pcibios_setup(char *str) +{ + printk(KERN_INFO "rr: pcibios_setup\n"); + /* Nothing to do for now. */ + + return str; +} + +unsigned __init int pcibios_assign_all_busses(void) +{ + /* We want to use the PCI bus detection done by PMON */ + return 0; +} + +#endif /* CONFIG_HYPERTRANSPORT */ diff --git a/arch/mips/pmc-sierra/yosemite/i2c-yosemite.c b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.c new file mode 100644 index 000000000000..416da22b3bf4 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.c @@ -0,0 +1,188 @@ +/* + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * Detailed Description: + * + * This block implements the I2C interface to the slave devices like the + * Atmel 24C32 EEPROM and the MAX 1619 Sensors device. The I2C Master interface + * can be controlled by the SCMB block. And the SCMB block kicks in only when + * using the Ethernet Mode of operation and __not__ the SysAD mode + * + * The SCMB controls the two modes: MDIO and the I2C. The MDIO mode is used to + * communicate with the Quad-PHY from Marvel. The I2C is used to communicate + * with the I2C slave devices. It seems that the driver does not explicitly + * deal with the control of SDA and SCL serial lines. So, the driver will set + * the slave address, drive the command and then the data. The SCMB will then + * control the two serial lines as required. + * + * It seems the documents are very unclear abt this. Hence, I took some time + * out to write the desciption to have an idea of how the I2C can actually + * work. Currently, this Linux driver wont be integrated into the generic Linux + * I2C framework. And finally, the I2C interface is also known as the 2BI + * interface. 2BI means 2-bit interface referring to SDA and SCL serial lines + * respectively. + * + * - Manish Lachwani (12/09/2003) + */ + +#include "i2c-yosemite.h" + +/* + * Poll the I2C interface for the BUSY bit. + */ +static int titan_i2c_poll(void) +{ + int i = 0; + unsigned long val = 0; + + for (i = 0; i < TITAN_I2C_MAX_POLL; i++) { + val = TITAN_I2C_READ(TITAN_I2C_COMMAND); + + if (!(val & 0x8000)) + return 0; + } + + return TITAN_I2C_ERR_TIMEOUT; +} + +/* + * Execute the I2C command + */ +int titan_i2c_xfer(unsigned int slave_addr, titan_i2c_command * cmd, + int size, unsigned int *addr) +{ + int loop = 0, bytes, i; + unsigned int *write_data, data, *read_data; + unsigned long reg_val, val; + + write_data = cmd->data; + read_data = addr; + + TITAN_I2C_WRITE(TITAN_I2C_SLAVE_ADDRESS, slave_addr); + + if (cmd->type == TITAN_I2C_CMD_WRITE) + loop = cmd->write_size; + else + loop = size; + + while (loop > 0) { + if ((cmd->type == TITAN_I2C_CMD_WRITE) || + (cmd->type == TITAN_I2C_CMD_READ_WRITE)) { + + reg_val = TITAN_I2C_DATA; + for (i = 0; i < TITAN_I2C_MAX_WORDS_PER_RW; + ++i, write_data += 2, reg_val += 4) { + if (bytes < cmd->write_size) { + data = write_data[0]; + ++data; + } + + if (bytes < cmd->write_size) { + data = write_data[1]; + ++data; + } + + TITAN_I2C_WRITE(reg_val, data); + } + } + + TITAN_I2C_WRITE(TITAN_I2C_COMMAND, + (unsigned int) (cmd->type << 13)); + if (titan_i2c_poll() != TITAN_I2C_ERR_OK) + return TITAN_I2C_ERR_TIMEOUT; + + if ((cmd->type == TITAN_I2C_CMD_READ) || + (cmd->type == TITAN_I2C_CMD_READ_WRITE)) { + + reg_val = TITAN_I2C_DATA; + for (i = 0; i < TITAN_I2C_MAX_WORDS_PER_RW; + ++i, read_data += 2, reg_val += 4) { + data = TITAN_I2C_READ(reg_val); + + if (bytes < size) { + read_data[0] = data & 0xff; + ++bytes; + } + + if (bytes < size) { + read_data[1] = + ((data >> 8) & 0xff); + ++bytes; + } + } + } + + loop -= (TITAN_I2C_MAX_WORDS_PER_RW * 2); + } + + /* + * Read the Interrupt status and then return the appropriate error code + */ + + val = TITAN_I2C_READ(TITAN_I2C_INTERRUPTS); + if (val & 0x0020) + return TITAN_I2C_ERR_ARB_LOST; + + if (val & 0x0040) + return TITAN_I2C_ERR_NO_RESP; + + if (val & 0x0080) + return TITAN_I2C_ERR_DATA_COLLISION; + + return TITAN_I2C_ERR_OK; +} + +/* + * Init the I2C subsystem of the PMC-Sierra Yosemite board + */ +int titan_i2c_init(titan_i2c_config * config) +{ + unsigned int val; + + /* + * Reset the SCMB and program into the I2C mode + */ + TITAN_I2C_WRITE(TITAN_I2C_SCMB_CONTROL, 0xA000); + TITAN_I2C_WRITE(TITAN_I2C_SCMB_CONTROL, 0x2000); + + /* + * Configure the filtera and clka values + */ + val = TITAN_I2C_READ(TITAN_I2C_SCMB_CLOCK_A); + val |= ((val & ~(0xF000)) | ((config->filtera << 12) & 0xF000)); + val |= ((val & ~(0x03FF)) | (config->clka & 0x03FF)); + TITAN_I2C_WRITE(TITAN_I2C_SCMB_CLOCK_A, val); + + /* + * Configure the filterb and clkb values + */ + val = TITAN_I2C_READ(TITAN_I2C_SCMB_CLOCK_B); + val |= ((val & ~(0xF000)) | ((config->filterb << 12) & 0xF000)); + val |= ((val & ~(0x03FF)) | (config->clkb & 0x03FF)); + TITAN_I2C_WRITE(TITAN_I2C_SCMB_CLOCK_B, val); + + return TITAN_I2C_ERR_OK; +} diff --git a/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h new file mode 100644 index 000000000000..31c5523276fa --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h @@ -0,0 +1,96 @@ +/* + * arch/mips/pmc-sierra/yosemite/i2c-yosemite.h + * + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __I2C_YOSEMITE_H +#define __I2C_YOSEMITE_H + +/* Read and Write operations to the chip */ + +#define TITAN_I2C_BASE 0xbb000000 /* XXX Needs to change */ + +#define TITAN_I2C_WRITE(offset, data) \ + *(volatile unsigned long *)(TITAN_I2C_BASE + offset) = data + +#define TITAN_I2C_READ(offset) *(volatile unsigned long *)(TITAN_I2C_BASE + offset) + + +/* Local constansts*/ +#define TITAN_I2C_MAX_FILTER 15 +#define TITAN_I2C_MAX_CLK 1023 +#define TITAN_I2C_MAX_ARBF 15 +#define TITAN_I2C_MAX_NAK 15 +#define TITAN_I2C_MAX_MASTERCODE 7 +#define TITAN_I2C_MAX_WORDS_PER_RW 4 +#define TITAN_I2C_MAX_POLL 100 + +/* Registers used for I2C work */ +#define TITAN_I2C_SCMB_CONTROL 0x0180 /* SCMB Control */ +#define TITAN_I2C_SCMB_CLOCK_A 0x0184 /* SCMB Clock A */ +#define TITAN_I2C_SCMB_CLOCK_B 0x0188 /* SCMB Clock B */ +#define TITAN_I2C_CONFIG 0x01A0 /* I2C Config */ +#define TITAN_I2C_COMMAND 0x01A4 /* I2C Command */ +#define TITAN_I2C_SLAVE_ADDRESS 0x01A8 /* I2C Slave Address */ +#define TITAN_I2C_DATA 0x01AC /* I2C Data [15:0] */ +#define TITAN_I2C_INTERRUPTS 0x01BC /* I2C Interrupts */ + +/* Error */ +#define TITAN_I2C_ERR_ARB_LOST (-9220) +#define TITAN_I2C_ERR_NO_RESP (-9221) +#define TITAN_I2C_ERR_DATA_COLLISION (-9222) +#define TITAN_I2C_ERR_TIMEOUT (-9223) +#define TITAN_I2C_ERR_OK 0 + +/* I2C Command Type */ +typedef enum { + TITAN_I2C_CMD_WRITE = 0, + TITAN_I2C_CMD_READ = 1, + TITAN_I2C_CMD_READ_WRITE = 2 +} titan_i2c_cmd_type; + +/* I2C structures */ +typedef struct { + int filtera; /* Register 0x0184, bits 15 - 12 */ + int clka; /* Register 0x0184, bits 9 - 0 */ + int filterb; /* Register 0x0188, bits 15 - 12 */ + int clkb; /* Register 0x0188, bits 9 - 0 */ +} titan_i2c_config; + +/* I2C command type */ +typedef struct { + titan_i2c_cmd_type type; /* Type of command */ + int num_arb; /* Register 0x01a0, bits 15 - 12 */ + int num_nak; /* Register 0x01a0, bits 11 - 8 */ + int addr_size; /* Register 0x01a0, bit 7 */ + int mst_code; /* Register 0x01a0, bits 6 - 4 */ + int arb_en; /* Register 0x01a0, bit 1 */ + int speed; /* Register 0x01a0, bit 0 */ + int slave_addr; /* Register 0x01a8 */ + int write_size; /* Register 0x01a4, bits 10 - 8 */ + unsigned int *data; /* Register 0x01ac */ +} titan_i2c_command; + +#endif /* __I2C_YOSEMITE_H */ diff --git a/arch/mips/pmc-sierra/yosemite/irq-handler.S b/arch/mips/pmc-sierra/yosemite/irq-handler.S new file mode 100644 index 000000000000..33b9c40d4f5c --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/irq-handler.S @@ -0,0 +1,93 @@ +/* + * Copyright 2003, 04 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com + * Copyright 2004 Ralf Baechle (ralf@linux-mips.org) + * + * First-level interrupt router for the PMC-Sierra Titan board + * + * 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. + * + * Titan supports Hypertransport or PCI but not both. Hence, one interrupt + * line is shared between the PCI slot A and Hypertransport. This is the + * Processor INTB #0. + */ + +#include <linux/config.h> +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + + .align 5 + NESTED(titan_handle_int, PT_SIZE, sp) + SAVE_ALL + CLI + .set at + .set noreorder + la ra, ret_from_irq + mfc0 t0, CP0_CAUSE + mfc0 t2, CP0_STATUS + + and t0, t2 + + andi t2, t0, STATUSF_IP7 /* INTB5 hardware line */ + bnez t2, ll_timer_irq /* Timer */ + andi t1, t0, STATUSF_IP2 /* INTB0 hardware line */ + bnez t1, ll_pcia_irq /* 64-bit PCI */ + andi t2, t0, STATUSF_IP3 /* INTB1 hardware line */ + bnez t2, ll_pcib_irq /* second 64-bit PCI slot */ + andi t1, t0, STATUSF_IP4 /* INTB2 hardware line */ + bnez t1, ll_duart_irq /* UART */ + andi t2, t0, STATUSF_IP5 /* SMP inter-core interrupts */ + bnez t2, ll_smp_irq + andi t1, t0, STATUSF_IP6 + bnez t1, ll_ht_irq /* Hypertransport */ + + move a0, sp + j do_extended_irq + END(titan_handle_int) + + .set reorder + .align 5 + +ll_pcia_irq: + li a0, 2 + move a1, sp +#ifdef CONFIG_HYPERTRANSPORT + j ll_ht_smp_irq_handler +#else + j do_IRQ +#endif + +ll_pcib_irq: + li a0, 3 + move a1, sp + j do_IRQ + +ll_duart_irq: + li a0, 4 + move a1, sp + j do_IRQ + +ll_smp_irq: + li a0, 5 + move a1, sp +#ifdef CONFIG_SMP + j titan_mailbox_irq +#else + j do_IRQ +#endif + +ll_ht_irq: + li a0, 6 + move a1, sp + j ll_ht_smp_irq_handler + +ll_timer_irq: + li a0, 7 + move a1, sp + j do_IRQ diff --git a/arch/mips/pmc-sierra/yosemite/irq.c b/arch/mips/pmc-sierra/yosemite/irq.c new file mode 100644 index 000000000000..f4e2897d9bf7 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/irq.c @@ -0,0 +1,167 @@ +/* + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Second level Interrupt handlers for the PMC-Sierra Titan/Yosemite board + */ +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/irq.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <linux/bitops.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/irq_cpu.h> +#include <asm/mipsregs.h> +#include <asm/system.h> +#include <asm/titan_dep.h> + +/* Hypertransport specific */ +#define IRQ_ACK_BITS 0x00000000 /* Ack bits */ + +#define HYPERTRANSPORT_INTA 0x78 /* INTA# */ +#define HYPERTRANSPORT_INTB 0x79 /* INTB# */ +#define HYPERTRANSPORT_INTC 0x7a /* INTC# */ +#define HYPERTRANSPORT_INTD 0x7b /* INTD# */ + +extern asmlinkage void titan_handle_int(void); +extern void jaguar_mailbox_irq(struct pt_regs *); + +/* + * Handle hypertransport & SMP interrupts. The interrupt lines are scarce. + * For interprocessor interrupts, the best thing to do is to use the INTMSG + * register. We use the same external interrupt line, i.e. INTB3 and monitor + * another status bit + */ +asmlinkage void ll_ht_smp_irq_handler(int irq, struct pt_regs *regs) +{ + u32 status = OCD_READ(RM9000x2_OCD_INTP0STATUS4); + + /* Ack all the bits that correspond to the interrupt sources */ + if (status != 0) + OCD_WRITE(RM9000x2_OCD_INTP0STATUS4, IRQ_ACK_BITS); + + status = OCD_READ(RM9000x2_OCD_INTP1STATUS4); + if (status != 0) + OCD_WRITE(RM9000x2_OCD_INTP1STATUS4, IRQ_ACK_BITS); + +#ifdef CONFIG_HT_LEVEL_TRIGGER + /* + * Level Trigger Mode only. Send the HT EOI message back to the source. + */ + switch (status) { + case 0x1000000: + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTA); + break; + case 0x2000000: + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTB); + break; + case 0x4000000: + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTC); + break; + case 0x8000000: + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTD); + break; + case 0x0000001: + /* PLX */ + OCD_WRITE(RM9000x2_OCD_HTEOI, 0x20); + OCD_WRITE(IRQ_CLEAR_REG, IRQ_ACK_BITS); + break; + case 0xf000000: + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTA); + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTB); + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTC); + OCD_WRITE(RM9000x2_OCD_HTEOI, HYPERTRANSPORT_INTD); + break; + } +#endif /* CONFIG_HT_LEVEL_TRIGGER */ + + do_IRQ(irq, regs); +} + +asmlinkage void do_extended_irq(struct pt_regs *regs) +{ + unsigned int intcontrol = read_c0_intcontrol(); + unsigned int cause = read_c0_cause(); + unsigned int status = read_c0_status(); + unsigned int pending_sr, pending_ic; + + pending_sr = status & cause & 0xff00; + pending_ic = (cause >> 8) & intcontrol & 0xff00; + + if (pending_ic & (1 << 13)) + do_IRQ(13, regs); + +} + +#ifdef CONFIG_KGDB +extern void init_second_port(void); +#endif + +/* + * Initialize the next level interrupt handler + */ +void __init arch_init_irq(void) +{ + clear_c0_status(ST0_IM); + + set_except_vector(0, titan_handle_int); + mips_cpu_irq_init(0); + rm7k_cpu_irq_init(8); + rm9k_cpu_irq_init(12); + +#ifdef CONFIG_KGDB + /* At this point, initialize the second serial port */ + init_second_port(); +#endif + +#ifdef CONFIG_GDB_CONSOLE + register_gdb_console(); +#endif +} + +#ifdef CONFIG_KGDB +/* + * The 16550 DUART has two ports, but is allocated one IRQ + * for the serial console. Hence, a generic framework for + * serial IRQ routing in place. Currently, just calls the + * do_IRQ fuction. But, going in the future, need to check + * DUART registers for channel A and B, then decide the + * appropriate action + */ +asmlinkage void yosemite_kgdb_irq(int irq, struct pt_regs *regs) +{ + do_IRQ(irq, regs); +} +#endif diff --git a/arch/mips/pmc-sierra/yosemite/prom.c b/arch/mips/pmc-sierra/yosemite/prom.c new file mode 100644 index 000000000000..1fb3e697948d --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/prom.c @@ -0,0 +1,141 @@ +/* + * 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. + * + * Copyright (C) 2003, 2004 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * Copyright (C) 2004 Ralf Baechle + */ +#include <linux/config.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/smp.h> + +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/processor.h> +#include <asm/reboot.h> +#include <asm/system.h> +#include <asm/bootinfo.h> +#include <asm/pmon.h> + +#ifdef CONFIG_SMP +extern void prom_grab_secondary(void); +#else +#define prom_grab_secondary() do { } while (0) +#endif + +#include "setup.h" + +struct callvectors *debug_vectors; + +extern unsigned long yosemite_base; +extern unsigned long cpu_clock; + +const char *get_system_type(void) +{ + return "PMC-Sierra Yosemite"; +} + +static void prom_cpu0_exit(void *arg) +{ + void *nvram = (void *) YOSEMITE_RTC_BASE; + + /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */ + writeb(0x84, nvram + 0xff7); + + /* wait for the watchdog to go off */ + mdelay(100 + (1000 / 16)); + + /* if the watchdog fails for some reason, let people know */ + printk(KERN_NOTICE "Watchdog reset failed\n"); +} + +/* + * Reset the NVRAM over the local bus + */ +static void prom_exit(void) +{ +#ifdef CONFIG_SMP + if (smp_processor_id()) + /* CPU 1 */ + smp_call_function(prom_cpu0_exit, NULL, 1, 1); +#endif + prom_cpu0_exit(NULL); +} + +/* + * Halt the system + */ +static void prom_halt(void) +{ + printk(KERN_NOTICE "\n** You can safely turn off the power\n"); + while (1) + __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0"); +} + +/* + * Init routine which accepts the variables from PMON + */ +void __init prom_init(void) +{ + int argc = fw_arg0; + char **arg = (char **) fw_arg1; + char **env = (char **) fw_arg2; + struct callvectors *cv = (struct callvectors *) fw_arg3; + int i = 0; + + /* Callbacks for halt, restart */ + _machine_restart = (void (*)(char *)) prom_exit; + _machine_halt = prom_halt; + _machine_power_off = prom_halt; + + debug_vectors = cv; + arcs_cmdline[0] = '\0'; + + /* Get the boot parameters */ + for (i = 1; i < argc; i++) { + if (strlen(arcs_cmdline) + strlen(arg[i] + 1) >= + sizeof(arcs_cmdline)) + break; + + strcat(arcs_cmdline, arg[i]); + strcat(arcs_cmdline, " "); + } + +#ifdef CONFIG_SERIAL_8250_CONSOLE + if ((strstr(arcs_cmdline, "console=ttyS")) == NULL) + strcat(arcs_cmdline, "console=ttyS0,115200"); +#endif + + while (*env) { + if (strncmp("ocd_base", *env, strlen("ocd_base")) == 0) + yosemite_base = + simple_strtol(*env + strlen("ocd_base="), NULL, + 16); + + if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) + cpu_clock = + simple_strtol(*env + strlen("cpuclock="), NULL, + 10); + + env++; + } + + mips_machgroup = MACH_GROUP_TITAN; + mips_machtype = MACH_TITAN_YOSEMITE; + + prom_grab_secondary(); +} + +void __init prom_free_prom_memory(void) +{ +} + +void __init prom_fixup_mem_map(unsigned long start, unsigned long end) +{ +} diff --git a/arch/mips/pmc-sierra/yosemite/py-console.c b/arch/mips/pmc-sierra/yosemite/py-console.c new file mode 100644 index 000000000000..757e605693ff --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/py-console.c @@ -0,0 +1,114 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2001, 2002, 2004 Ralf Baechle + */ +#include <linux/init.h> +#include <linux/console.h> +#include <linux/kdev_t.h> +#include <linux/major.h> +#include <linux/termios.h> +#include <linux/sched.h> +#include <linux/tty.h> + +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <asm/serial.h> +#include <asm/io.h> + +/* SUPERIO uart register map */ +struct yo_uartregs { + union { + volatile u8 rbr; /* read only, DLAB == 0 */ + volatile u8 thr; /* write only, DLAB == 0 */ + volatile u8 dll; /* DLAB == 1 */ + } u1; + union { + volatile u8 ier; /* DLAB == 0 */ + volatile u8 dlm; /* DLAB == 1 */ + } u2; + union { + volatile u8 iir; /* read only */ + volatile u8 fcr; /* write only */ + } u3; + volatile u8 iu_lcr; + volatile u8 iu_mcr; + volatile u8 iu_lsr; + volatile u8 iu_msr; + volatile u8 iu_scr; +} yo_uregs_t; + +#define iu_rbr u1.rbr +#define iu_thr u1.thr +#define iu_dll u1.dll +#define iu_ier u2.ier +#define iu_dlm u2.dlm +#define iu_iir u3.iir +#define iu_fcr u3.fcr + +#define ssnop() __asm__ __volatile__("sll $0, $0, 1\n"); +#define ssnop_4() do { ssnop(); ssnop(); ssnop(); ssnop(); } while (0) + +#define IO_BASE_64 0x9000000000000000ULL + +static unsigned char readb_outer_space(unsigned long long phys) +{ + unsigned long long vaddr = IO_BASE_64 | phys; + unsigned char res; + unsigned int sr; + + sr = read_c0_status(); + write_c0_status((sr | ST0_KX) & ~ ST0_IE); + ssnop_4(); + + __asm__ __volatile__ ( + " .set mips3 \n" + " ld %0, %1 \n" + " lbu %0, (%0) \n" + " .set mips0 \n" + : "=r" (res) + : "m" (vaddr)); + + write_c0_status(sr); + ssnop_4(); + + return res; +} + +static void writeb_outer_space(unsigned long long phys, unsigned char c) +{ + unsigned long long vaddr = IO_BASE_64 | phys; + unsigned long tmp; + unsigned int sr; + + sr = read_c0_status(); + write_c0_status((sr | ST0_KX) & ~ ST0_IE); + ssnop_4(); + + __asm__ __volatile__ ( + " .set mips3 \n" + " ld %0, %1 \n" + " sb %2, (%0) \n" + " .set mips0 \n" + : "=&r" (tmp) + : "m" (vaddr), "r" (c)); + + write_c0_status(sr); + ssnop_4(); +} + +void prom_putchar(char c) +{ + unsigned long lsr = 0xfd000008ULL + offsetof(struct yo_uartregs, iu_lsr); + unsigned long thr = 0xfd000008ULL + offsetof(struct yo_uartregs, iu_thr); + + while ((readb_outer_space(lsr) & 0x20) == 0); + writeb_outer_space(thr, c); +} + +char __init prom_getchar(void) +{ + return 0; +} diff --git a/arch/mips/pmc-sierra/yosemite/setup.c b/arch/mips/pmc-sierra/yosemite/setup.c new file mode 100644 index 000000000000..7225bbf20ce4 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/setup.c @@ -0,0 +1,235 @@ +/* + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/bcd.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/swap.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/termios.h> +#include <linux/tty.h> +#include <linux/serial.h> +#include <linux/serial_core.h> + +#include <asm/time.h> +#include <asm/bootinfo.h> +#include <asm/page.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/processor.h> +#include <asm/ptrace.h> +#include <asm/reboot.h> +#include <asm/serial.h> +#include <asm/titan_dep.h> +#include <asm/m48t37.h> + +#include "setup.h" + +unsigned char titan_ge_mac_addr_base[6] = { + // 0x00, 0x03, 0xcc, 0x1d, 0x22, 0x00 + 0x00, 0xe0, 0x04, 0x00, 0x00, 0x21 +}; + +unsigned long cpu_clock; +unsigned long yosemite_base; + +static struct m48t37_rtc *m48t37_base; + +void __init bus_error_init(void) +{ + /* Do nothing */ +} + + +unsigned long m48t37y_get_time(void) +{ + unsigned int year, month, day, hour, min, sec; + + /* Stop the update to the time */ + m48t37_base->control = 0x40; + + year = BCD2BIN(m48t37_base->year); + year += BCD2BIN(m48t37_base->century) * 100; + + month = BCD2BIN(m48t37_base->month); + day = BCD2BIN(m48t37_base->date); + hour = BCD2BIN(m48t37_base->hour); + min = BCD2BIN(m48t37_base->min); + sec = BCD2BIN(m48t37_base->sec); + + /* Start the update to the time again */ + m48t37_base->control = 0x00; + + return mktime(year, month, day, hour, min, sec); +} + +int m48t37y_set_time(unsigned long sec) +{ + struct rtc_time tm; + + /* convert to a more useful format -- note months count from 0 */ + to_tm(sec, &tm); + tm.tm_mon += 1; + + /* enable writing */ + m48t37_base->control = 0x80; + + /* year */ + m48t37_base->year = BIN2BCD(tm.tm_year % 100); + m48t37_base->century = BIN2BCD(tm.tm_year / 100); + + /* month */ + m48t37_base->month = BIN2BCD(tm.tm_mon); + + /* day */ + m48t37_base->date = BIN2BCD(tm.tm_mday); + + /* hour/min/sec */ + m48t37_base->hour = BIN2BCD(tm.tm_hour); + m48t37_base->min = BIN2BCD(tm.tm_min); + m48t37_base->sec = BIN2BCD(tm.tm_sec); + + /* day of week -- not really used, but let's keep it up-to-date */ + m48t37_base->day = BIN2BCD(tm.tm_wday + 1); + + /* disable writing */ + m48t37_base->control = 0x00; + + return 0; +} + +void yosemite_timer_setup(struct irqaction *irq) +{ + setup_irq(7, irq); +} + +void yosemite_time_init(void) +{ + board_timer_setup = yosemite_timer_setup; + mips_hpt_frequency = cpu_clock / 2; +mips_hpt_frequency = 33000000 * 3 * 5; +} + +/* No other usable initialization hook than this ... */ +extern void (*late_time_init)(void); + +unsigned long ocd_base; + +EXPORT_SYMBOL(ocd_base); + +/* + * Common setup before any secondaries are started + */ + +#define TITAN_UART_CLK 3686400 +#define TITAN_SERIAL_BASE_BAUD (TITAN_UART_CLK / 16) +#define TITAN_SERIAL_IRQ 4 +#define TITAN_SERIAL_BASE 0xfd000008UL + +static void __init py_map_ocd(void) +{ + ocd_base = (unsigned long) ioremap(OCD_BASE, OCD_SIZE); + if (!ocd_base) + panic("Mapping OCD failed - game over. Your score is 0."); + + /* Kludge for PMON bug ... */ + OCD_WRITE(0x0710, 0x0ffff029); +} + +static void __init py_uart_setup(void) +{ + struct uart_port up; + + /* + * Register to interrupt zero because we share the interrupt with + * the serial driver which we don't properly support yet. + */ + memset(&up, 0, sizeof(up)); + up.membase = (unsigned char *) ioremap(TITAN_SERIAL_BASE, 8); + up.irq = TITAN_SERIAL_IRQ; + up.uartclk = TITAN_UART_CLK; + up.regshift = 0; + up.iotype = UPIO_MEM; + up.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST; + up.line = 0; + + if (early_serial_setup(&up)) + printk(KERN_ERR "Early serial init of port 0 failed\n"); +} + +static void __init py_rtc_setup(void) +{ + m48t37_base = ioremap(YOSEMITE_RTC_BASE, YOSEMITE_RTC_SIZE); + if (!m48t37_base) + printk(KERN_ERR "Mapping the RTC failed\n"); + + rtc_get_time = m48t37y_get_time; + rtc_set_time = m48t37y_set_time; + + write_seqlock(&xtime_lock); + xtime.tv_sec = m48t37y_get_time(); + xtime.tv_nsec = 0; + + set_normalized_timespec(&wall_to_monotonic, + -xtime.tv_sec, -xtime.tv_nsec); + write_sequnlock(&xtime_lock); +} + +/* Not only time init but that's what the hook it's called through is named */ +static void __init py_late_time_init(void) +{ + py_map_ocd(); + py_uart_setup(); + py_rtc_setup(); +} + +static int __init pmc_yosemite_setup(void) +{ + board_time_init = yosemite_time_init; + late_time_init = py_late_time_init; + + /* Add memory regions */ + add_memory_region(0x00000000, 0x10000000, BOOT_MEM_RAM); + +#if 0 /* XXX Crash ... */ + OCD_WRITE(RM9000x2_OCD_HTSC, + OCD_READ(RM9000x2_OCD_HTSC) | HYPERTRANSPORT_ENABLE); + + /* Set the BAR. Shifted mode */ + OCD_WRITE(RM9000x2_OCD_HTBAR0, HYPERTRANSPORT_BAR0_ADDR); + OCD_WRITE(RM9000x2_OCD_HTMASK0, HYPERTRANSPORT_SIZE0); +#endif + + return 0; +} + +early_initcall(pmc_yosemite_setup); diff --git a/arch/mips/pmc-sierra/yosemite/setup.h b/arch/mips/pmc-sierra/yosemite/setup.h new file mode 100644 index 000000000000..1a01abfc7d33 --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/setup.h @@ -0,0 +1,32 @@ +/* + * Copyright 2003, 04 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * Copyright 2004 Ralf Baechle <ralf@linux-mips.org> + * + * Board specific definititions for the PMC-Sierra Yosemite + * + * 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. + */ +#ifndef __SETUP_H__ +#define __SETUP_H__ + +/* M48T37 RTC + NVRAM */ +#define YOSEMITE_RTC_BASE 0xfc800000 +#define YOSEMITE_RTC_SIZE 0x00800000 + +#define HYPERTRANSPORT_BAR0_ADDR 0x00000006 +#define HYPERTRANSPORT_SIZE0 0x0fffffff +#define HYPERTRANSPORT_BAR0_ATTR 0x00002000 + +#define HYPERTRANSPORT_ENABLE 0x6 + +/* + * EEPROM Size + */ +#define TITAN_ATMEL_24C32_SIZE 32768 +#define TITAN_ATMEL_24C64_SIZE 65536 + +#endif /* __SETUP_H__ */ diff --git a/arch/mips/pmc-sierra/yosemite/smp.c b/arch/mips/pmc-sierra/yosemite/smp.c new file mode 100644 index 000000000000..1d3b0734c78c --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/smp.c @@ -0,0 +1,172 @@ +#include <linux/linkage.h> +#include <linux/sched.h> + +#include <asm/pmon.h> +#include <asm/titan_dep.h> + +extern unsigned int (*mips_hpt_read)(void); +extern void (*mips_hpt_init)(unsigned int); + +#define LAUNCHSTACK_SIZE 256 + +static spinlock_t launch_lock __initdata; + +static unsigned long secondary_sp __initdata; +static unsigned long secondary_gp __initdata; + +static unsigned char launchstack[LAUNCHSTACK_SIZE] __initdata + __attribute__((aligned(2 * sizeof(long)))); + +static void __init prom_smp_bootstrap(void) +{ + local_irq_disable(); + + while (spin_is_locked(&launch_lock)); + + __asm__ __volatile__( + " move $sp, %0 \n" + " move $gp, %1 \n" + " j smp_bootstrap \n" + : + : "r" (secondary_sp), "r" (secondary_gp)); +} + +/* + * PMON is a fragile beast. It'll blow up once the mappings it's littering + * right into the middle of KSEG3 are blown away so we have to grab the slave + * core early and keep it in a waiting loop. + */ +void __init prom_grab_secondary(void) +{ + spin_lock(&launch_lock); + + pmon_cpustart(1, &prom_smp_bootstrap, + launchstack + LAUNCHSTACK_SIZE, 0); +} + +/* + * Detect available CPUs, populate phys_cpu_present_map before smp_init + * + * We don't want to start the secondary CPU yet nor do we have a nice probing + * feature in PMON so we just assume presence of the secondary core. + */ +static char maxcpus_string[] __initdata = + KERN_WARNING "max_cpus set to 0; using 1 instead\n"; + +void __init prom_prepare_cpus(unsigned int max_cpus) +{ + int enabled = 0, i; + + if (max_cpus == 0) { + printk(maxcpus_string); + max_cpus = 1; + } + + cpus_clear(phys_cpu_present_map); + + for (i = 0; i < 2; i++) { + if (i == max_cpus) + break; + + /* + * The boot CPU + */ + cpu_set(i, phys_cpu_present_map); + __cpu_number_map[i] = i; + __cpu_logical_map[i] = i; + enabled++; + } + + /* + * Be paranoid. Enable the IPI only if we're really about to go SMP. + */ + if (enabled > 1) + set_c0_status(STATUSF_IP5); +} + +/* + * Firmware CPU startup hook + * Complicated by PMON's weird interface which tries to minimic the UNIX fork. + * It launches the next * available CPU and copies some information on the + * stack so the first thing we do is throw away that stuff and load useful + * values into the registers ... + */ +void prom_boot_secondary(int cpu, struct task_struct *idle) +{ + unsigned long gp = (unsigned long) idle->thread_info; + unsigned long sp = gp + THREAD_SIZE - 32; + + secondary_sp = sp; + secondary_gp = gp; + + spin_unlock(&launch_lock); +} + +/* Hook for after all CPUs are online */ +void prom_cpus_done(void) +{ +} + +/* + * After we've done initial boot, this function is called to allow the + * board code to clean up state, if needed + */ +void prom_init_secondary(void) +{ + mips_hpt_init(mips_hpt_read()); + + set_c0_status(ST0_CO | ST0_IE | ST0_IM); +} + +void prom_smp_finish(void) +{ +} + +asmlinkage void titan_mailbox_irq(struct pt_regs *regs) +{ + int cpu = smp_processor_id(); + unsigned long status; + + if (cpu == 0) { + status = OCD_READ(RM9000x2_OCD_INTP0STATUS3); + OCD_WRITE(RM9000x2_OCD_INTP0CLEAR3, status); + } + + if (cpu == 1) { + status = OCD_READ(RM9000x2_OCD_INTP1STATUS3); + OCD_WRITE(RM9000x2_OCD_INTP1CLEAR3, status); + } + + if (status & 0x2) + smp_call_function_interrupt(); +} + +/* + * Send inter-processor interrupt + */ +void core_send_ipi(int cpu, unsigned int action) +{ + /* + * Generate an INTMSG so that it can be sent over to the + * destination CPU. The INTMSG will put the STATUS bits + * based on the action desired. An alternative strategy + * is to write to the Interrupt Set register, read the + * Interrupt Status register and clear the Interrupt + * Clear register. The latter is preffered. + */ + switch (action) { + case SMP_RESCHEDULE_YOURSELF: + if (cpu == 1) + OCD_WRITE(RM9000x2_OCD_INTP1SET3, 4); + else + OCD_WRITE(RM9000x2_OCD_INTP0SET3, 4); + break; + + case SMP_CALL_FUNCTION: + if (cpu == 1) + OCD_WRITE(RM9000x2_OCD_INTP1SET3, 2); + else + OCD_WRITE(RM9000x2_OCD_INTP0SET3, 2); + break; + } +} |