diff options
Diffstat (limited to 'arch/mips/pci/pci-xlp.c')
| -rw-r--r-- | arch/mips/pci/pci-xlp.c | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/arch/mips/pci/pci-xlp.c b/arch/mips/pci/pci-xlp.c deleted file mode 100644 index 9eff9137f78e..000000000000 --- a/arch/mips/pci/pci-xlp.c +++ /dev/null @@ -1,332 +0,0 @@ -/* - * Copyright (c) 2003-2012 Broadcom Corporation - * All Rights Reserved - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the Broadcom - * license below: - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * THIS SOFTWARE IS PROVIDED BY BROADCOM ``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 BROADCOM OR CONTRIBUTORS 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. - */ - -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/msi.h> -#include <linux/mm.h> -#include <linux/irq.h> -#include <linux/irqdesc.h> -#include <linux/console.h> - -#include <asm/io.h> - -#include <asm/netlogic/interrupt.h> -#include <asm/netlogic/haldefs.h> -#include <asm/netlogic/common.h> -#include <asm/netlogic/mips-extns.h> - -#include <asm/netlogic/xlp-hal/iomap.h> -#include <asm/netlogic/xlp-hal/xlp.h> -#include <asm/netlogic/xlp-hal/pic.h> -#include <asm/netlogic/xlp-hal/pcibus.h> -#include <asm/netlogic/xlp-hal/bridge.h> - -static void *pci_config_base; - -#define pci_cfg_addr(bus, devfn, off) (((bus) << 20) | ((devfn) << 12) | (off)) - -/* PCI ops */ -static inline u32 pci_cfg_read_32bit(struct pci_bus *bus, unsigned int devfn, - int where) -{ - u32 data; - u32 *cfgaddr; - - where &= ~3; - if (cpu_is_xlp9xx()) { - /* be very careful on SoC buses */ - if (bus->number == 0) { - /* Scan only existing nodes - uboot bug? */ - if (PCI_SLOT(devfn) != 0 || - !nlm_node_present(PCI_FUNC(devfn))) - return 0xffffffff; - } else if (bus->parent->number == 0) { /* SoC bus */ - if (PCI_SLOT(devfn) == 0) /* b.0.0 hangs */ - return 0xffffffff; - if (devfn == 44) /* b.5.4 hangs */ - return 0xffffffff; - } - } else if (bus->number == 0 && PCI_SLOT(devfn) == 1 && where == 0x954) { - return 0xffffffff; - } - cfgaddr = (u32 *)(pci_config_base + - pci_cfg_addr(bus->number, devfn, where)); - data = *cfgaddr; - return data; -} - -static inline void pci_cfg_write_32bit(struct pci_bus *bus, unsigned int devfn, - int where, u32 data) -{ - u32 *cfgaddr; - - cfgaddr = (u32 *)(pci_config_base + - pci_cfg_addr(bus->number, devfn, where & ~3)); - *cfgaddr = data; -} - -static int nlm_pcibios_read(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 *val) -{ - u32 data; - - if ((size == 2) && (where & 1)) - return PCIBIOS_BAD_REGISTER_NUMBER; - else if ((size == 4) && (where & 3)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - data = pci_cfg_read_32bit(bus, devfn, where); - - if (size == 1) - *val = (data >> ((where & 3) << 3)) & 0xff; - else if (size == 2) - *val = (data >> ((where & 3) << 3)) & 0xffff; - else - *val = data; - - return PCIBIOS_SUCCESSFUL; -} - - -static int nlm_pcibios_write(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 val) -{ - u32 data; - - if ((size == 2) && (where & 1)) - return PCIBIOS_BAD_REGISTER_NUMBER; - else if ((size == 4) && (where & 3)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - data = pci_cfg_read_32bit(bus, devfn, where); - - if (size == 1) - data = (data & ~(0xff << ((where & 3) << 3))) | - (val << ((where & 3) << 3)); - else if (size == 2) - data = (data & ~(0xffff << ((where & 3) << 3))) | - (val << ((where & 3) << 3)); - else - data = val; - - pci_cfg_write_32bit(bus, devfn, where, data); - - return PCIBIOS_SUCCESSFUL; -} - -struct pci_ops nlm_pci_ops = { - .read = nlm_pcibios_read, - .write = nlm_pcibios_write -}; - -static struct resource nlm_pci_mem_resource = { - .name = "XLP PCI MEM", - .start = 0xd0000000UL, /* 256MB PCI mem @ 0xd000_0000 */ - .end = 0xdfffffffUL, - .flags = IORESOURCE_MEM, -}; - -static struct resource nlm_pci_io_resource = { - .name = "XLP IO MEM", - .start = 0x14000000UL, /* 64MB PCI IO @ 0x1000_0000 */ - .end = 0x17ffffffUL, - .flags = IORESOURCE_IO, -}; - -struct pci_controller nlm_pci_controller = { - .index = 0, - .pci_ops = &nlm_pci_ops, - .mem_resource = &nlm_pci_mem_resource, - .mem_offset = 0x00000000UL, - .io_resource = &nlm_pci_io_resource, - .io_offset = 0x00000000UL, -}; - -struct pci_dev *xlp_get_pcie_link(const struct pci_dev *dev) -{ - struct pci_bus *bus, *p; - - bus = dev->bus; - - if (cpu_is_xlp9xx()) { - /* find bus with grand parent number == 0 */ - for (p = bus->parent; p && p->parent && p->parent->number != 0; - p = p->parent) - bus = p; - return (p && p->parent) ? bus->self : NULL; - } else { - /* Find the bridge on bus 0 */ - for (p = bus->parent; p && p->number != 0; p = p->parent) - bus = p; - - return p ? bus->self : NULL; - } -} - -int xlp_socdev_to_node(const struct pci_dev *lnkdev) -{ - if (cpu_is_xlp9xx()) - return PCI_FUNC(lnkdev->bus->self->devfn); - else - return PCI_SLOT(lnkdev->devfn) / 8; -} - -int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) -{ - struct pci_dev *lnkdev; - int lnkfunc, node; - - /* - * For XLP PCIe, there is an IRQ per Link, find out which - * link the device is on to assign interrupts - */ - lnkdev = xlp_get_pcie_link(dev); - if (lnkdev == NULL) - return 0; - - lnkfunc = PCI_FUNC(lnkdev->devfn); - node = xlp_socdev_to_node(lnkdev); - - return nlm_irq_to_xirq(node, PIC_PCIE_LINK_LEGACY_IRQ(lnkfunc)); -} - -/* Do platform specific device initialization at pci_enable_device() time */ -int pcibios_plat_dev_init(struct pci_dev *dev) -{ - return 0; -} - -/* - * If big-endian, enable hardware byteswap on the PCIe bridges. - * This will make both the SoC and PCIe devices behave consistently with - * readl/writel. - */ -#ifdef __BIG_ENDIAN -static void xlp_config_pci_bswap(int node, int link) -{ - uint64_t nbubase, lnkbase; - u32 reg; - - nbubase = nlm_get_bridge_regbase(node); - lnkbase = nlm_get_pcie_base(node, link); - - /* - * Enable byte swap in hardware. Program each link's PCIe SWAP regions - * from the link's address ranges. - */ - if (cpu_is_xlp9xx()) { - reg = nlm_read_bridge_reg(nbubase, - BRIDGE_9XX_PCIEMEM_BASE0 + link); - nlm_write_pci_reg(lnkbase, PCIE_9XX_BYTE_SWAP_MEM_BASE, reg); - - reg = nlm_read_bridge_reg(nbubase, - BRIDGE_9XX_PCIEMEM_LIMIT0 + link); - nlm_write_pci_reg(lnkbase, - PCIE_9XX_BYTE_SWAP_MEM_LIM, reg | 0xfff); - - reg = nlm_read_bridge_reg(nbubase, - BRIDGE_9XX_PCIEIO_BASE0 + link); - nlm_write_pci_reg(lnkbase, PCIE_9XX_BYTE_SWAP_IO_BASE, reg); - - reg = nlm_read_bridge_reg(nbubase, - BRIDGE_9XX_PCIEIO_LIMIT0 + link); - nlm_write_pci_reg(lnkbase, - PCIE_9XX_BYTE_SWAP_IO_LIM, reg | 0xfff); - } else { - reg = nlm_read_bridge_reg(nbubase, BRIDGE_PCIEMEM_BASE0 + link); - nlm_write_pci_reg(lnkbase, PCIE_BYTE_SWAP_MEM_BASE, reg); - - reg = nlm_read_bridge_reg(nbubase, - BRIDGE_PCIEMEM_LIMIT0 + link); - nlm_write_pci_reg(lnkbase, PCIE_BYTE_SWAP_MEM_LIM, reg | 0xfff); - - reg = nlm_read_bridge_reg(nbubase, BRIDGE_PCIEIO_BASE0 + link); - nlm_write_pci_reg(lnkbase, PCIE_BYTE_SWAP_IO_BASE, reg); - - reg = nlm_read_bridge_reg(nbubase, BRIDGE_PCIEIO_LIMIT0 + link); - nlm_write_pci_reg(lnkbase, PCIE_BYTE_SWAP_IO_LIM, reg | 0xfff); - } -} -#else -/* Swap configuration not needed in little-endian mode */ -static inline void xlp_config_pci_bswap(int node, int link) {} -#endif /* __BIG_ENDIAN */ - -static int __init pcibios_init(void) -{ - uint64_t pciebase; - int link, n; - u32 reg; - - /* Firmware assigns PCI resources */ - pci_set_flags(PCI_PROBE_ONLY); - pci_config_base = ioremap(XLP_DEFAULT_PCI_ECFG_BASE, 64 << 20); - - /* Extend IO port for memory mapped io */ - ioport_resource.start = 0; - ioport_resource.end = ~0; - - for (n = 0; n < NLM_NR_NODES; n++) { - if (!nlm_node_present(n)) - continue; - - for (link = 0; link < PCIE_NLINKS; link++) { - pciebase = nlm_get_pcie_base(n, link); - if (nlm_read_pci_reg(pciebase, 0) == 0xffffffff) - continue; - xlp_config_pci_bswap(n, link); - xlp_init_node_msi_irqs(n, link); - - /* put in intpin and irq - u-boot does not */ - reg = nlm_read_pci_reg(pciebase, 0xf); - reg &= ~0x1ffu; - reg |= (1 << 8) | PIC_PCIE_LINK_LEGACY_IRQ(link); - nlm_write_pci_reg(pciebase, 0xf, reg); - pr_info("XLP PCIe: Link %d-%d initialized.\n", n, link); - } - } - - set_io_port_base(CKSEG1); - nlm_pci_controller.io_map_base = CKSEG1; - - register_pci_controller(&nlm_pci_controller); - pr_info("XLP PCIe Controller %pR%pR.\n", &nlm_pci_io_resource, - &nlm_pci_mem_resource); - - return 0; -} -arch_initcall(pcibios_init); |