diff options
Diffstat (limited to 'arch/powerpc/sysdev/fsl_pci.c')
-rw-r--r-- | arch/powerpc/sysdev/fsl_pci.c | 244 |
1 files changed, 105 insertions, 139 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index 24ba1b6b31f..10c47b56702 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -1,136 +1,98 @@ /* - * MPC86XX pci setup code + * MPC85xx/86xx PCI/PCIE support routing. * - * Recode: ZHANG WEI <wei.zhang@freescale.com> - * Initial author: Xianghua Xiao <x.xiao@freescale.com> + * Copyright 2007 Freescale Semiconductor, Inc * - * Copyright 2006 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/types.h> -#include <linux/module.h> -#include <linux/init.h> +#include <linux/kernel.h> #include <linux/pci.h> -#include <linux/serial.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/bootmem.h> -#include <asm/system.h> -#include <asm/atomic.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> -#include "../platforms/86xx/mpc86xx.h" - -#undef DEBUG - -#ifdef DEBUG -#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) -#else -#define DBG(fmt, args...) -#endif - -struct pcie_outbound_window_regs { - uint pexotar; /* 0x.0 - PCI Express outbound translation address register */ - uint pexotear; /* 0x.4 - PCI Express outbound translation extended address register */ - uint pexowbar; /* 0x.8 - PCI Express outbound window base address register */ - char res1[4]; - uint pexowar; /* 0x.10 - PCI Express outbound window attributes register */ - char res2[12]; -}; - -struct pcie_inbound_window_regs { - uint pexitar; /* 0x.0 - PCI Express inbound translation address register */ - char res1[4]; - uint pexiwbar; /* 0x.8 - PCI Express inbound window base address register */ - uint pexiwbear; /* 0x.c - PCI Express inbound window base extended address register */ - uint pexiwar; /* 0x.10 - PCI Express inbound window attributes register */ - char res2[12]; -}; - -static void __init setup_pcie_atmu(struct pci_controller *hose, struct resource *rsrc) +/* atmu setup for fsl pci/pcie controller */ +void __init setup_pci_atmu(struct pci_controller *hose, struct resource *rsrc) { - volatile struct ccsr_pex *pcie; - volatile struct pcie_outbound_window_regs *pcieow; - volatile struct pcie_inbound_window_regs *pcieiw; - int i = 0; + struct ccsr_pci __iomem *pci; + int i; - DBG("PCIE memory map start 0x%x, size 0x%x\n", rsrc->start, + pr_debug("PCI memory map start 0x%x, size 0x%x\n", rsrc->start, rsrc->end - rsrc->start + 1); - pcie = ioremap(rsrc->start, rsrc->end - rsrc->start + 1); - - /* Disable all windows (except pexowar0 since its ignored) */ - pcie->pexowar1 = 0; - pcie->pexowar2 = 0; - pcie->pexowar3 = 0; - pcie->pexowar4 = 0; - pcie->pexiwar1 = 0; - pcie->pexiwar2 = 0; - pcie->pexiwar3 = 0; - - pcieow = (struct pcie_outbound_window_regs *)&pcie->pexotar1; - pcieiw = (struct pcie_inbound_window_regs *)&pcie->pexitar1; - - /* Setup outbound MEM window */ - for(i = 0; i < 3; i++) - if (hose->mem_resources[i].flags & IORESOURCE_MEM){ - DBG("PCIE 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); - pcieow->pexotar = (hose->mem_resources[i].start) >> 12 - & 0x000fffff; - pcieow->pexotear = 0; - pcieow->pexowbar = (hose->mem_resources[i].start) >> 12 - & 0x000fffff; - /* Enable, Mem R/W */ - pcieow->pexowar = 0x80044000 | - (__ilog2(hose->mem_resources[i].end - - hose->mem_resources[i].start + 1) - - 1); - pcieow++; - } - - /* Setup outbound IO window */ - if (hose->io_resource.flags & IORESOURCE_IO){ - DBG("PCIE 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); - pcieow->pexotar = (hose->io_resource.start) >> 12 & 0x000fffff; - pcieow->pexotear = 0; - pcieow->pexowbar = (hose->io_base_phys) >> 12 & 0x000fffff; - /* Enable, IO R/W */ - pcieow->pexowar = 0x80088000 | (__ilog2(hose->io_resource.end - - hose->io_resource.start + 1) - 1); - } - - /* Setup 2G inbound Memory Window @ 0 */ - pcieiw->pexitar = 0x00000000; - pcieiw->pexiwbar = 0x00000000; - /* Enable, Prefetch, Local Mem, Snoop R/W, 2G */ - pcieiw->pexiwar = 0xa0f5501e; + 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); } -static void __init -mpc86xx_setup_pcie(struct pci_controller *hose, u32 pcie_offset, u32 pcie_size) +void __init setup_pci_cmd(struct pci_controller *hose) { u16 cmd; - - DBG("PCIE host controller register offset 0x%08x, size 0x%08x.\n", - pcie_offset, pcie_size); - early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd); cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY - | PCI_COMMAND_IO; + | PCI_COMMAND_IO; early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd); - early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80); } @@ -167,72 +129,76 @@ static void __devinit quirk_fsl_pcie_transparent(struct pci_dev *dev) } } +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; +} -DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7010, quirk_fsl_pcie_transparent); -DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7011, quirk_fsl_pcie_transparent); - -#define PCIE_LTSSM 0x404 /* PCIe Link Training and Status */ -#define PCIE_LTSSM_L0 0x16 /* L0 state */ - -int __init mpc86xx_add_bridge(struct device_node *dev) +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; - int has_address = 0; - int primary = 0; - u16 val; - DBG("Adding PCIE host bridge %s\n", dev->full_name); + pr_debug("Adding PCI host bridge %s\n", dev->full_name); /* Fetch host bridge registers address */ - has_address = (of_address_to_resource(dev, 0, &rsrc) == 0); + 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); + " bus 0\n", dev->full_name); pci_assign_all_buses = 1; hose = pcibios_alloc_controller(dev); if (!hose) return -ENOMEM; - hose->indirect_type = PPC_INDIRECT_TYPE_EXT_REG | - PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; - 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); - - /* Probe the hose link training status */ - early_read_config_word(hose, 0, 0, PCIE_LTSSM, &val); - if (val < PCIE_LTSSM_L0) - return -ENXIO; + /* check PCI express bridge */ + if (of_device_is_compatible(dev, "fsl,mpc8548-pcie") || + of_device_is_compatible(dev, "fsl,mpc8641-pcie")) + hose->indirect_type = PPC_INDIRECT_TYPE_EXT_REG | + PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; - /* Setup the PCIE host controller. */ - mpc86xx_setup_pcie(hose, rsrc.start, rsrc.end - rsrc.start + 1); + setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4); + setup_pci_cmd(hose); - if ((rsrc.start & 0xfffff) == 0x8000) - primary = 1; + /* check PCI express link status */ + if (of_device_is_compatible(dev, "fsl,mpc8548-pcie") || + of_device_is_compatible(dev, "fsl,mpc8641-pcie")) + if (fsl_pcie_check_link(hose)) + return -ENXIO; - printk(KERN_INFO "Found MPC86xx PCIE host bridge at 0x%08lx. " - "Firmware bus number: %d->%d\n", - (unsigned long) rsrc.start, - hose->first_busno, hose->last_busno); + 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); - DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n", + 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, primary); + pci_process_bridge_OF_ranges(hose, dev, is_primary); /* Setup PEX window registers */ - setup_pcie_atmu(hose, &rsrc); + setup_pci_atmu(hose, &rsrc); return 0; } + +DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7010, quirk_fsl_pcie_transparent); +DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7011, quirk_fsl_pcie_transparent); |