diff options
Diffstat (limited to 'arch/powerpc/sysdev/fsl_pci.c')
| -rw-r--r-- | arch/powerpc/sysdev/fsl_pci.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c new file mode 100644 index 00000000000..51c223385fe --- /dev/null +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -0,0 +1,257 @@ +/* + * MPC85xx/86xx PCI/PCIE support routing. + * + * Copyright 2007 Freescale Semiconductor, Inc + * + * Initial author: Xianghua Xiao <x.xiao@freescale.com> + * Recode: ZHANG WEI <wei.zhang@freescale.com> + * Rewrite the routing for Frescale PCI and PCI Express + * Roy Zang <tie-fei.zang@freescale.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. + */ +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/bootmem.h> + +#include <asm/io.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> +#include <asm/machdep.h> +#include <sysdev/fsl_soc.h> +#include <sysdev/fsl_pci.h> + +/* atmu setup for fsl pci/pcie controller */ +void __init setup_pci_atmu(struct pci_controller *hose, struct resource *rsrc) +{ + struct ccsr_pci __iomem *pci; + int i; + + pr_debug("PCI memory map start 0x%x, size 0x%x\n", rsrc->start, + rsrc->end - rsrc->start + 1); + pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1); + + /* Disable all windows (except powar0 since its ignored) */ + for(i = 1; i < 5; i++) + out_be32(&pci->pow[i].powar, 0); + for(i = 0; i < 3; i++) + out_be32(&pci->piw[i].piwar, 0); + + /* Setup outbound MEM window */ + for(i = 0; i < 3; i++) + if (hose->mem_resources[i].flags & IORESOURCE_MEM){ + pr_debug("PCI MEM resource start 0x%08x, size 0x%08x.\n", + hose->mem_resources[i].start, + hose->mem_resources[i].end + - hose->mem_resources[i].start + 1); + out_be32(&pci->pow[i+1].potar, + (hose->mem_resources[i].start >> 12) + & 0x000fffff); + out_be32(&pci->pow[i+1].potear, 0); + out_be32(&pci->pow[i+1].powbar, + (hose->mem_resources[i].start >> 12) + & 0x000fffff); + /* Enable, Mem R/W */ + out_be32(&pci->pow[i+1].powar, 0x80044000 + | (__ilog2(hose->mem_resources[i].end + - hose->mem_resources[i].start + 1) - 1)); + } + + /* Setup outbound IO window */ + if (hose->io_resource.flags & IORESOURCE_IO){ + pr_debug("PCI IO resource start 0x%08x, size 0x%08x, phy base 0x%08x.\n", + hose->io_resource.start, + hose->io_resource.end - hose->io_resource.start + 1, + hose->io_base_phys); + out_be32(&pci->pow[i+1].potar, (hose->io_resource.start >> 12) + & 0x000fffff); + out_be32(&pci->pow[i+1].potear, 0); + out_be32(&pci->pow[i+1].powbar, (hose->io_base_phys >> 12) + & 0x000fffff); + /* Enable, IO R/W */ + out_be32(&pci->pow[i+1].powar, 0x80088000 + | (__ilog2(hose->io_resource.end + - hose->io_resource.start + 1) - 1)); + } + + /* Setup 2G inbound Memory Window @ 1 */ + out_be32(&pci->piw[2].pitar, 0x00000000); + out_be32(&pci->piw[2].piwbar,0x00000000); + out_be32(&pci->piw[2].piwar, PIWAR_2G); +} + +void __init setup_pci_cmd(struct pci_controller *hose) +{ + u16 cmd; + int cap_x; + + early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd); + cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY + | PCI_COMMAND_IO; + early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd); + + cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX); + if (cap_x) { + int pci_x_cmd = cap_x + PCI_X_CMD; + cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ + | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E; + early_write_config_word(hose, 0, 0, pci_x_cmd, cmd); + } else { + early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80); + } +} + +static void __devinit quirk_fsl_pcie_transparent(struct pci_dev *dev) +{ + struct resource *res; + int i, res_idx = PCI_BRIDGE_RESOURCES; + struct pci_controller *hose; + + /* if we aren't a PCIe don't bother */ + if (!pci_find_capability(dev, PCI_CAP_ID_EXP)) + return ; + + /* + * Make the bridge be transparent. + */ + dev->transparent = 1; + + hose = pci_bus_to_host(dev->bus); + if (!hose) { + printk(KERN_ERR "Can't find hose for bus %d\n", + dev->bus->number); + return; + } + + /* Clear out any of the virtual P2P bridge registers */ + pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 0); + pci_write_config_word(dev, PCI_IO_LIMIT_UPPER16, 0); + pci_write_config_byte(dev, PCI_IO_BASE, 0x10); + pci_write_config_byte(dev, PCI_IO_LIMIT, 0); + pci_write_config_word(dev, PCI_MEMORY_BASE, 0x10); + pci_write_config_word(dev, PCI_MEMORY_LIMIT, 0); + pci_write_config_word(dev, PCI_PREF_BASE_UPPER32, 0x0); + pci_write_config_word(dev, PCI_PREF_LIMIT_UPPER32, 0x0); + pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10); + pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0); + + if (hose->io_resource.flags) { + res = &dev->resource[res_idx++]; + res->start = hose->io_resource.start; + res->end = hose->io_resource.end; + res->flags = hose->io_resource.flags; + update_bridge_resource(dev, res); + } + + for (i = 0; i < 3; i++) { + res = &dev->resource[res_idx + i]; + res->start = hose->mem_resources[i].start; + res->end = hose->mem_resources[i].end; + res->flags = hose->mem_resources[i].flags; + update_bridge_resource(dev, res); + } +} + +int __init fsl_pcie_check_link(struct pci_controller *hose) +{ + u16 val; + early_read_config_word(hose, 0, 0, PCIE_LTSSM, &val); + if (val < PCIE_LTSSM_L0) + return 1; + return 0; +} + +void fsl_pcibios_fixup_bus(struct pci_bus *bus) +{ + struct pci_controller *hose = (struct pci_controller *) bus->sysdata; + int i; + + /* deal with bogus pci_bus when we don't have anything connected on PCIe */ + if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) { + if (bus->parent) { + for (i = 0; i < 4; ++i) + bus->resource[i] = bus->parent->resource[i]; + } + } +} + +int __init fsl_add_bridge(struct device_node *dev, int is_primary) +{ + int len; + struct pci_controller *hose; + struct resource rsrc; + const int *bus_range; + + pr_debug("Adding PCI host bridge %s\n", dev->full_name); + + /* Fetch host bridge registers address */ + if (of_address_to_resource(dev, 0, &rsrc)) { + printk(KERN_WARNING "Can't get pci register base!"); + return -ENOMEM; + } + + /* Get bus range if any */ + bus_range = of_get_property(dev, "bus-range", &len); + if (bus_range == NULL || len < 2 * sizeof(int)) + printk(KERN_WARNING "Can't get bus-range for %s, assume" + " bus 0\n", dev->full_name); + + pci_assign_all_buses = 1; + hose = pcibios_alloc_controller(dev); + if (!hose) + return -ENOMEM; + + hose->first_busno = bus_range ? bus_range[0] : 0x0; + hose->last_busno = bus_range ? bus_range[1] : 0xff; + + setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4, + PPC_INDIRECT_TYPE_BIG_ENDIAN); + setup_pci_cmd(hose); + + /* check PCI express link status */ + if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { + hose->indirect_type = PPC_INDIRECT_TYPE_EXT_REG | + PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; + if (fsl_pcie_check_link(hose)) + hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; + } + + printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx." + "Firmware bus number: %d->%d\n", + (unsigned long long)rsrc.start, hose->first_busno, + hose->last_busno); + + pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n", + hose, hose->cfg_addr, hose->cfg_data); + + /* Interpret the "ranges" property */ + /* This also maps the I/O region and sets isa_io/mem_base */ + pci_process_bridge_OF_ranges(hose, dev, is_primary); + + /* Setup PEX window registers */ + setup_pci_atmu(hose, &rsrc); + + return 0; +} + +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_transparent); 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