diff options
Diffstat (limited to 'drivers/pci/pci-uclass.c')
| -rw-r--r-- | drivers/pci/pci-uclass.c | 93 |
1 files changed, 52 insertions, 41 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 0756bbe..1d93194 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -85,30 +85,7 @@ static int pci_get_bus_max(void) int pci_last_busno(void) { - struct pci_controller *hose; - struct udevice *bus; - struct uclass *uc; - int ret; - - debug("pci_last_busno\n"); - ret = uclass_get(UCLASS_PCI, &uc); - if (ret || list_empty(&uc->dev_head)) - return -1; - - /* Probe the last bus */ - bus = list_entry(uc->dev_head.prev, struct udevice, uclass_node); - debug("bus = %p, %s\n", bus, bus->name); - assert(bus); - ret = device_probe(bus); - if (ret) - return ret; - - /* If that bus has bridges, we may have new buses now. Get the last */ - bus = list_entry(uc->dev_head.prev, struct udevice, uclass_node); - hose = dev_get_uclass_priv(bus); - debug("bus = %s, hose = %p\n", bus->name, hose); - - return hose->last_busno; + return pci_get_bus_max(); } int pci_get_ff(enum pci_size_t size) @@ -387,9 +364,23 @@ int dm_pci_read_config32(struct udevice *dev, int offset, u32 *valuep) return 0; } +static void set_vga_bridge_bits(struct udevice *dev) +{ + struct udevice *parent = dev->parent; + u16 bc; + + while (parent->seq != 0) { + dm_pci_read_config16(parent, PCI_BRIDGE_CONTROL, &bc); + bc |= PCI_BRIDGE_CTL_VGA; + dm_pci_write_config16(parent, PCI_BRIDGE_CONTROL, bc); + parent = parent->parent; + } +} + int pci_auto_config_devices(struct udevice *bus) { struct pci_controller *hose = bus->uclass_priv; + struct pci_child_platdata *pplat; unsigned int sub_bus; struct udevice *dev; int ret; @@ -401,10 +392,18 @@ int pci_auto_config_devices(struct udevice *bus) !ret && dev; ret = device_find_next_child(&dev)) { unsigned int max_bus; + int ret; debug("%s: device %s\n", __func__, dev->name); - max_bus = pciauto_config_device(hose, pci_get_bdf(dev)); + ret = pciauto_config_device(hose, pci_get_bdf(dev)); + if (ret < 0) + return ret; + max_bus = ret; sub_bus = max(sub_bus, max_bus); + + pplat = dev_get_parent_platdata(dev); + if (pplat->class == (PCI_CLASS_DISPLAY_VGA << 8)) + set_vga_bridge_bits(dev); } debug("%s: done\n", __func__); @@ -434,7 +433,7 @@ int dm_pci_hose_probe_bus(struct pci_controller *hose, pci_dev_t bdf) ret = device_probe(bus); if (ret) { - debug("%s: Cannot probe bus bus %s: %d\n", __func__, bus->name, + debug("%s: Cannot probe bus %s: %d\n", __func__, bus->name, ret); return ret; } @@ -474,10 +473,17 @@ static bool pci_match_one_id(const struct pci_device_id *id, * pci_find_and_bind_driver() - Find and bind the right PCI driver * * This only looks at certain fields in the descriptor. + * + * @parent: Parent bus + * @find_id: Specification of the driver to find + * @bdf: Bus/device/function addreess - see PCI_BDF() + * @devp: Returns a pointer to the device created + * @return 0 if OK, -EPERM if the device is not needed before relocation and + * therefore was not created, other -ve value on error */ static int pci_find_and_bind_driver(struct udevice *parent, - struct pci_device_id *find_id, pci_dev_t bdf, - struct udevice **devp) + struct pci_device_id *find_id, + pci_dev_t bdf, struct udevice **devp) { struct pci_driver_entry *start, *entry; const char *drv; @@ -513,7 +519,7 @@ static int pci_find_and_bind_driver(struct udevice *parent, */ if (!(gd->flags & GD_FLG_RELOC) && !(drv->flags & DM_FLAG_PRE_RELOC)) - return 0; + return -EPERM; /* * We could pass the descriptor to the driver as @@ -541,7 +547,7 @@ static int pci_find_and_bind_driver(struct udevice *parent, * limited (ie: using Cache As RAM). */ if (!(gd->flags & GD_FLG_RELOC) && !bridge) - return 0; + return -EPERM; /* Bind a generic driver so that the device can be used */ sprintf(name, "pci_%x:%x.%x", parent->seq, PCI_DEV(bdf), @@ -553,7 +559,7 @@ static int pci_find_and_bind_driver(struct udevice *parent, ret = device_bind_driver(parent, drv, str, devp); if (ret) { - debug("%s: Failed to bind generic driver: %d", __func__, ret); + debug("%s: Failed to bind generic driver: %d\n", __func__, ret); return ret; } debug("%s: No match found: bound generic driver instead\n", __func__); @@ -629,17 +635,17 @@ int pci_bind_bus_devices(struct udevice *bus) ret = pci_find_and_bind_driver(bus, &find_id, bdf, &dev); } - if (ret) + if (ret == -EPERM) + continue; + else if (ret) return ret; /* Update the platform data */ - if (dev) { - pplat = dev_get_parent_platdata(dev); - pplat->devfn = PCI_MASK_BUS(bdf); - pplat->vendor = vendor; - pplat->device = device; - pplat->class = class; - } + pplat = dev_get_parent_platdata(dev); + pplat->devfn = PCI_MASK_BUS(bdf); + pplat->vendor = vendor; + pplat->device = device; + pplat->class = class; } return 0; @@ -777,6 +783,8 @@ static int pci_uclass_post_probe(struct udevice *bus) #ifdef CONFIG_PCI_PNP ret = pci_auto_config_devices(bus); + if (ret < 0) + return ret; #endif #if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP) @@ -793,11 +801,14 @@ static int pci_uclass_post_probe(struct udevice *bus) * Note we only call this 1) after U-Boot is relocated, and 2) * root bus has finished probing. */ - if ((gd->flags & GD_FLG_RELOC) && (bus->seq == 0)) + if ((gd->flags & GD_FLG_RELOC) && (bus->seq == 0)) { ret = fsp_init_phase_pci(); + if (ret) + return ret; + } #endif - return ret < 0 ? ret : 0; + return 0; } static int pci_uclass_child_post_bind(struct udevice *dev) |