PCI controller setup code will initialize structure fsl_pci according to PCI dts node and initialize PCI command register and ATMU. The patch uses general API of_pci_parse_bus_range to parse PCI bus range, uses general of_address's API to parse PCI IO/MEM ranges.
Signed-off-by: Minghuan Lian <minghuan.l...@freescale.com> --- change log: v4: no change v1-v3: Derived from http://patchwork.ozlabs.org/patch/278965/ Based on upstream master. Based on the discussion of RFC version here http://patchwork.ozlabs.org/patch/274487/ drivers/pci/host/pci-fsl-common.c | 179 +++++++++++++++++++++----------------- 1 file changed, 97 insertions(+), 82 deletions(-) diff --git a/drivers/pci/host/pci-fsl-common.c b/drivers/pci/host/pci-fsl-common.c index 26ee4c3..7184ac7 100644 --- a/drivers/pci/host/pci-fsl-common.c +++ b/drivers/pci/host/pci-fsl-common.c @@ -24,6 +24,8 @@ #include <linux/log2.h> #include <linux/slab.h> #include <linux/uaccess.h> +#include <linux/of_address.h> +#include <linux/of_pci.h> #include <asm/io.h> #include <asm/prom.h> @@ -498,131 +500,144 @@ static void setup_pci_atmu(struct fsl_pci *pci) } } -static void __init setup_pci_cmd(struct pci_controller *hose) +static void __init setup_pci_cmd(struct fsl_pci *pci) { u16 cmd; int cap_x; - early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd); + early_fsl_read_config_word(pci, 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); + early_fsl_write_config_word(pci, 0, 0, PCI_COMMAND, cmd); - cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX); + cap_x = early_fsl_find_capability(pci, 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); - } + early_fsl_write_config_word(pci, 0, 0, pci_x_cmd, cmd); + } else + early_fsl_write_config_byte(pci, 0, 0, PCI_LATENCY_TIMER, + 0x80); } -int __init fsl_add_bridge(struct platform_device *pdev, int is_primary) +static int __init +fsl_pci_setup(struct platform_device *pdev, struct fsl_pci *pci) { - int len; - struct pci_controller *hose; - struct resource rsrc; - const int *bus_range; + struct resource *rsrc; u8 hdr_type, progif; - struct device_node *dev; - struct ccsr_pci __iomem *pci; - - dev = pdev->dev.of_node; + struct device_node *dn; + struct of_pci_range range; + struct of_pci_range_parser parser; + int mem = 0; - if (!of_device_is_available(dev)) { - pr_warning("%s: disabled\n", dev->full_name); - return -ENODEV; - } + dn = pdev->dev.of_node; + pci->dn = dn; + pci->dev = &pdev->dev; - pr_debug("Adding PCI host bridge %s\n", dev->full_name); + dev_info(&pdev->dev, "Find controller %s\n", dn->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; + rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!rsrc) { + dev_err(&pdev->dev, "Can't get pci register base!"); + return -EINVAL; } + dev_info(&pdev->dev, "REG 0x%016llx..0x%016llx\n", + (u64)rsrc->start, (u64)rsrc->end); - /* 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_add_flags(PCI_REASSIGN_ALL_BUS); - hose = pcibios_alloc_controller(dev); - if (!hose) - return -ENOMEM; + /* Parse pci range resources from device tree */ + if (of_pci_range_parser_init(&parser, dn)) { + dev_err(&pdev->dev, "missing ranges property\n"); + return -EINVAL; + } - /* set platform device as the parent */ - hose->parent = &pdev->dev; - hose->first_busno = bus_range ? bus_range[0] : 0x0; - hose->last_busno = bus_range ? bus_range[1] : 0xff; + /* Get the I/O and memory ranges from device tree */ + for_each_of_pci_range(&parser, &range) { + unsigned long restype = range.flags & IORESOURCE_TYPE_BITS; + if (restype == IORESOURCE_IO) { + of_pci_range_to_resource(&range, dn, + &pci->io_resource); + pci->io_resource.name = "I/O"; + pci->io_resource.start = range.pci_addr; + pci->io_resource.end = range.pci_addr + range.size - 1; + pci->pci_io_size = range.size; + pci->io_base_phys = range.cpu_addr - range.pci_addr; + dev_info(&pdev->dev, + " IO 0x%016llx..0x%016llx -> 0x%016llx\n", + range.cpu_addr, + range.cpu_addr + range.size - 1, + range.pci_addr); + } + if (restype == IORESOURCE_MEM) { + if (mem >= 3) + continue; + of_pci_range_to_resource(&range, dn, + &pci->mem_resources[mem]); + pci->mem_resources[mem].name = "MEM"; + pci->mem_offset[mem] = range.cpu_addr - range.pci_addr; + dev_info(&pdev->dev, + "MEM 0x%016llx..0x%016llx -> 0x%016llx\n", + (u64)pci->mem_resources[mem].start, + (u64)pci->mem_resources[mem].end, + range.pci_addr); + } + } - pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n", - (u64)rsrc.start, (u64)resource_size(&rsrc)); + /* Get bus range */ + if (of_pci_parse_bus_range(dn, &pci->busn)) { + dev_err(&pdev->dev, "failed to parse bus-range property\n"); + pci->first_busno = 0x0; + pci->last_busno = 0xff; + } else { + pci->first_busno = pci->busn.start; + pci->last_busno = pci->busn.end; + } + dev_info(&pdev->dev, "Firmware bus number %d->%d\n", + pci->first_busno, pci->last_busno); - pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc)); - if (!hose->private_data) - goto no_bridge; + pci->regs = devm_ioremap_resource(&pdev->dev, rsrc); + if (IS_ERR(pci->regs)) + return PTR_ERR(pci->regs); - setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4, - PPC_INDIRECT_TYPE_BIG_ENDIAN); + pci->ops = &fsl_indirect_pci_ops; + pci->indirect_type = INDIRECT_TYPE_BIG_ENDIAN; - if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0) - hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK; + if (in_be32(&pci->regs->block_rev1) < PCIE_IP_REV_3_0) + pci->indirect_type |= INDIRECT_TYPE_FSL_CFG_REG_LINK; - if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { - /* use fsl_indirect_read_config for PCIe */ - hose->ops = &fsl_indirect_pcie_ops; - /* For PCIE read HEADER_TYPE to identify controler mode */ - early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type); - if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE) + pci->is_pcie = !!early_fsl_find_capability(pci, 0, 0, PCI_CAP_ID_EXP); + if (pci->is_pcie) { + /* For PCIE read HEADER_TYPE to identify controller mode */ + early_fsl_read_config_byte(pci, 0, 0, PCI_HEADER_TYPE, + &hdr_type); + if ((hdr_type & 0x7f) == PCI_HEADER_TYPE_NORMAL) goto no_bridge; - } else { /* For PCI read PROG to identify controller mode */ - early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif); + early_fsl_read_config_byte(pci, 0, 0, PCI_CLASS_PROG, &progif); if ((progif & 1) == 1) goto no_bridge; } - setup_pci_cmd(hose); + setup_pci_cmd(pci); /* 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; + if (pci->is_pcie) { + pci->indirect_type |= INDIRECT_TYPE_EXT_REG | + INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; + if (!fsl_pci_check_link(pci)) + pci->indirect_type |= 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); + setup_pci_atmu(pci); + + platform_set_drvdata(pdev, pci); return 0; no_bridge: - iounmap(hose->private_data); - /* unmap cfg_data & cfg_addr separately if not on same page */ - if (((unsigned long)hose->cfg_data & PAGE_MASK) != - ((unsigned long)hose->cfg_addr & PAGE_MASK)) - iounmap(hose->cfg_data); - iounmap(hose->cfg_addr); - pcibios_free_controller(hose); return -ENODEV; } -- 1.8.1.2 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
