Added support for PCI prefetchable region and BARs

[karo-tx-uboot.git] / drivers / pci_auto.c

diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c
index 3302457a3909dc1590d4a8961ddeb6a8c9200be0..15f74328f0a6a011c58cd425c56cb3a561dd1c98 100644 (file)
--- a/drivers/pci_auto.c
+++ b/drivers/pci_auto.c
@@ -77,6 +77,7 @@ int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned
 void pciauto_setup_device(struct pci_controller *hose,
                          pci_dev_t dev, int bars_num,
                          struct pci_region *mem,
+                         struct pci_region *prefetch,
                          struct pci_region *io)
 {
        unsigned int bar_value, bar_response, bar_size;
@@ -111,7 +112,10 @@ void pciauto_setup_device(struct pci_controller *hose,
                                found_mem64 = 1;
 
                        bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
-                       bar_res = mem;
+                       if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH))
+                               bar_res = prefetch;
+                       else
+                               bar_res = mem;
 
                        DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%x, ", bar_nr, bar_size);
                }
@@ -148,6 +152,7 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
                                         pci_dev_t dev, int sub_bus)
 {
        struct pci_region *pci_mem = hose->pci_mem;
+       struct pci_region *pci_prefetch = hose->pci_prefetch;
        struct pci_region *pci_io = hose->pci_io;
        unsigned int cmdstat;
 
@@ -169,6 +174,21 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
                cmdstat |= PCI_COMMAND_MEMORY;
        }
 
+       if (pci_prefetch) {
+               /* Round memory allocator to 1MB boundary */
+               pciauto_region_align(pci_prefetch, 0x100000);
+
+               /* Set up memory and I/O filter limits, assume 32-bit I/O space */
+               pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE,
+                                       (pci_prefetch->bus_lower & 0xfff00000) >> 16);
+
+               cmdstat |= PCI_COMMAND_MEMORY;
+       } else {
+               /* We don't support prefetchable memory for now, so disable */
+               pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, 0x1000);
+               pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, 0x1000);
+       }
+
        if (pci_io) {
                /* Round I/O allocator to 4KB boundary */
                pciauto_region_align(pci_io, 0x1000);
@@ -181,10 +201,6 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
                cmdstat |= PCI_COMMAND_IO;
        }
 
-       /* We don't support prefetchable memory for now, so disable */
-       pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, 0x1000);
-       pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, 0x1000);
-
        /* Enable memory and I/O accesses, enable bus master */
        pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat | PCI_COMMAND_MASTER);
 }
@@ -193,6 +209,7 @@ static void pciauto_postscan_setup_bridge(struct pci_controller *hose,
                                          pci_dev_t dev, int sub_bus)
 {
        struct pci_region *pci_mem = hose->pci_mem;
+       struct pci_region *pci_prefetch = hose->pci_prefetch;
        struct pci_region *pci_io = hose->pci_io;
 
        /* Configure bus number registers */
@@ -206,6 +223,14 @@ static void pciauto_postscan_setup_bridge(struct pci_controller *hose,
                                        (pci_mem->bus_lower-1) >> 16);
        }
 
+       if (pci_prefetch) {
+               /* Round memory allocator to 1MB boundary */
+               pciauto_region_align(pci_prefetch, 0x100000);
+
+               pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT,
+                                       (pci_prefetch->bus_lower-1) >> 16);
+       }
+
        if (pci_io) {
                /* Round I/O allocator to 4KB boundary */
                pciauto_region_align(pci_io, 0x1000);
@@ -239,6 +264,11 @@ void pciauto_config_init(struct pci_controller *hose)
                            hose->pci_mem->size < hose->regions[i].size)
                                hose->pci_mem = hose->regions + i;
                        break;
+               case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
+                       if (!hose->pci_prefetch ||
+                           hose->pci_prefetch->size < hose->regions[i].size)
+                               hose->pci_prefetch = hose->regions + i;
+                       break;
                }
        }
 
@@ -251,6 +281,14 @@ void pciauto_config_init(struct pci_controller *hose)
                    hose->pci_mem->bus_start + hose->pci_mem->size - 1);
        }
 
+       if (hose->pci_prefetch) {
+               pciauto_region_init(hose->pci_prefetch);
+
+               DEBUGF("PCI Autoconfig: Prefetchable Memory region: [%lx-%lx]\n",
+                   hose->pci_prefetch->bus_start,
+                   hose->pci_prefetch->bus_start + hose->pci_prefetch->size - 1);
+       }
+
        if (hose->pci_io) {
                pciauto_region_init(hose->pci_io);
 
@@ -275,7 +313,7 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
        switch(class) {
        case PCI_CLASS_BRIDGE_PCI:
                hose->current_busno++;
-               pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_io);
+               pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
 
                DEBUGF("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_DEV(dev));
 
@@ -301,12 +339,12 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
                        return sub_bus;
                }
 
-               pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_io);
+               pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
                break;
 
        case PCI_CLASS_BRIDGE_CARDBUS:
                /* just do a minimal setup of the bridge, let the OS take care of the rest */
-               pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_io);
+               pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
 
                DEBUGF("PCI Autoconfig: Found P2CardBus bridge, device %d\n", PCI_DEV(dev));
 
@@ -328,11 +366,11 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
                 * the PIMMR window to be allocated (BAR0 - 1MB size)
                 */
                DEBUGF("PCI Autoconfig: Broken bridge found, only minimal config\n");
-               pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_io);
+               pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
                break;
 #endif
        default:
-               pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_io);
+               pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
                break;
        }