Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c839e0eff500af03de65e560c2e21c3831586e6e
Commit:     c839e0eff500af03de65e560c2e21c3831586e6e
Parent:     5738ec6d00b7abbcd4cd342af83fd18d192b0979
Author:     Benjamin Herrenschmidt <[EMAIL PROTECTED]>
AuthorDate: Fri Dec 21 15:39:23 2007 +1100
Committer:  Josh Boyer <[EMAIL PROTECTED]>
CommitDate: Sun Dec 23 13:12:27 2007 -0600

    [POWERPC] 4xx: PLB to PCI 2.x support
    
    This adds to the previous patch the support for the 4xx PCI 2.x
    bridges.
    
    Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
    Signed-off-by: Josh Boyer <[EMAIL PROTECTED]>
---
 arch/powerpc/sysdev/ppc4xx_pci.c |  180 +++++++++++++++++++++++++++++++++++++-
 arch/powerpc/sysdev/ppc4xx_pci.h |   19 ++++
 2 files changed, 198 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index a0b6239..b7d7988 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -21,6 +21,36 @@ static int dma_offset_set;
 /* Move that to a useable header */
 extern unsigned long total_memory;
 
+static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
+{
+       struct pci_controller *hose;
+       int i;
+
+       if (dev->devfn != 0 || dev->bus->self != NULL)
+               return;
+
+       hose = pci_bus_to_host(dev->bus);
+       if (hose == NULL)
+               return;
+
+       if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") &&
+           !of_device_is_compatible(hose->dn, "ibm,plb-pcix") &&
+           !of_device_is_compatible(hose->dn, "ibm,plb-pci"))
+               return;
+
+       /* Hide the PCI host BARs from the kernel as their content doesn't
+        * fit well in the resource management
+        */
+       for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+               dev->resource[i].start = dev->resource[i].end = 0;
+               dev->resource[i].flags = 0;
+       }
+
+       printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n",
+              pci_name(dev));
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge);
+
 static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
                                          void __iomem *reg,
                                          struct resource *res)
@@ -126,9 +156,157 @@ static int __init ppc4xx_parse_dma_ranges(struct 
pci_controller *hose,
 /*
  * 4xx PCI 2.x part
  */
+
+static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose,
+                                            void __iomem *reg)
+{
+       u32 la, ma, pcila, pciha;
+       int i, j;
+
+       /* Setup outbound memory windows */
+       for (i = j = 0; i < 3; i++) {
+               struct resource *res = &hose->mem_resources[i];
+
+               /* we only care about memory windows */
+               if (!(res->flags & IORESOURCE_MEM))
+                       continue;
+               if (j > 2) {
+                       printk(KERN_WARNING "%s: Too many ranges\n",
+                              hose->dn->full_name);
+                       break;
+               }
+
+               /* Calculate register values */
+               la = res->start;
+#ifdef CONFIG_RESOURCES_64BIT
+               pciha = (res->start - hose->pci_mem_offset) >> 32;
+               pcila = (res->start - hose->pci_mem_offset) & 0xffffffffu;
+#else
+               pciha = 0;
+               pcila = res->start - hose->pci_mem_offset;
+#endif
+
+               ma = res->end + 1 - res->start;
+               if (!is_power_of_2(ma) || ma < 0x1000 || ma > 0xffffffffu) {
+                       printk(KERN_WARNING "%s: Resource out of range\n",
+                              hose->dn->full_name);
+                       continue;
+               }
+               ma = (0xffffffffu << ilog2(ma)) | 0x1;
+               if (res->flags & IORESOURCE_PREFETCH)
+                       ma |= 0x2;
+
+               /* Program register values */
+               writel(la, reg + PCIL0_PMM0LA + (0x10 * j));
+               writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * j));
+               writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * j));
+               writel(ma, reg + PCIL0_PMM0MA + (0x10 * j));
+               j++;
+       }
+}
+
+static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose,
+                                            void __iomem *reg,
+                                            const struct resource *res)
+{
+       resource_size_t size = res->end - res->start + 1;
+       u32 sa;
+
+       /* Calculate window size */
+       sa = (0xffffffffu << ilog2(size)) | 1;
+       sa |= 0x1;
+
+       /* RAM is always at 0 local for now */
+       writel(0, reg + PCIL0_PTM1LA);
+       writel(sa, reg + PCIL0_PTM1MS);
+
+       /* Map on PCI side */
+       early_write_config_dword(hose, hose->first_busno, 0,
+                                PCI_BASE_ADDRESS_1, res->start);
+       early_write_config_dword(hose, hose->first_busno, 0,
+                                PCI_BASE_ADDRESS_2, 0x00000000);
+       early_write_config_word(hose, hose->first_busno, 0,
+                               PCI_COMMAND, 0x0006);
+}
+
 static void __init ppc4xx_probe_pci_bridge(struct device_node *np)
 {
        /* NYI */
+       struct resource rsrc_cfg;
+       struct resource rsrc_reg;
+       struct resource dma_window;
+       struct pci_controller *hose = NULL;
+       void __iomem *reg = NULL;
+       const int *bus_range;
+       int primary = 0;
+
+       /* Fetch config space registers address */
+       if (of_address_to_resource(np, 0, &rsrc_cfg)) {
+               printk(KERN_ERR "%s:Can't get PCI config register base !",
+                      np->full_name);
+               return;
+       }
+       /* Fetch host bridge internal registers address */
+       if (of_address_to_resource(np, 3, &rsrc_reg)) {
+               printk(KERN_ERR "%s: Can't get PCI internal register base !",
+                      np->full_name);
+               return;
+       }
+
+       /* Check if primary bridge */
+       if (of_get_property(np, "primary", NULL))
+               primary = 1;
+
+       /* Get bus range if any */
+       bus_range = of_get_property(np, "bus-range", NULL);
+
+       /* Map registers */
+       reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start);
+       if (reg == NULL) {
+               printk(KERN_ERR "%s: Can't map registers !", np->full_name);
+               goto fail;
+       }
+
+       /* Allocate the host controller data structure */
+       hose = pcibios_alloc_controller(np);
+       if (!hose)
+               goto fail;
+
+       hose->first_busno = bus_range ? bus_range[0] : 0x0;
+       hose->last_busno = bus_range ? bus_range[1] : 0xff;
+
+       /* Setup config space */
+       setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0);
+
+       /* Disable all windows */
+       writel(0, reg + PCIL0_PMM0MA);
+       writel(0, reg + PCIL0_PMM1MA);
+       writel(0, reg + PCIL0_PMM2MA);
+       writel(0, reg + PCIL0_PTM1MS);
+       writel(0, reg + PCIL0_PTM2MS);
+
+       /* Parse outbound mapping resources */
+       pci_process_bridge_OF_ranges(hose, np, primary);
+
+       /* Parse inbound mapping resources */
+       if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0)
+               goto fail;
+
+       /* Configure outbound ranges POMs */
+       ppc4xx_configure_pci_PMMs(hose, reg);
+
+       /* Configure inbound ranges PIMs */
+       ppc4xx_configure_pci_PTMs(hose, reg, &dma_window);
+
+       /* We don't need the registers anymore */
+       iounmap(reg);
+       return;
+
+ fail:
+       if (hose)
+               pcibios_free_controller(hose);
+       if (reg)
+               iounmap(reg);
 }
 
 /*
@@ -155,7 +333,7 @@ static void __init ppc4xx_configure_pcix_POMs(struct 
pci_controller *hose,
                }
 
                /* Calculate register values */
-#ifdef CONFIG_PTE_64BIT
+#ifdef CONFIG_RESOURCES_64BIT
                lah = res->start >> 32;
                lal = res->start & 0xffffffffu;
                pciah = (res->start - hose->pci_mem_offset) >> 32;
diff --git a/arch/powerpc/sysdev/ppc4xx_pci.h b/arch/powerpc/sysdev/ppc4xx_pci.h
index f9b4e6f..8b787bf 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.h
+++ b/arch/powerpc/sysdev/ppc4xx_pci.h
@@ -101,6 +101,25 @@
 #define PCIX0_MSGOH            0x10c
 #define PCIX0_IM               0x1f8
 
+/*
+ * 4xx PCI bridge register definitions
+ */
+#define PCIL0_PMM0LA           0x00
+#define PCIL0_PMM0MA           0x04
+#define PCIL0_PMM0PCILA                0x08
+#define PCIL0_PMM0PCIHA                0x0c
+#define PCIL0_PMM1LA           0x10
+#define PCIL0_PMM1MA           0x14
+#define PCIL0_PMM1PCILA                0x18
+#define PCIL0_PMM1PCIHA                0x1c
+#define PCIL0_PMM2LA           0x20
+#define PCIL0_PMM2MA           0x24
+#define PCIL0_PMM2PCILA                0x28
+#define PCIL0_PMM2PCIHA                0x2c
+#define PCIL0_PTM1MS           0x30
+#define PCIL0_PTM1LA           0x34
+#define PCIL0_PTM2MS           0x38
+#define PCIL0_PTM2LA           0x3c
 
 
 #endif /* __PPC4XX_PCI_H__ */
-
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