ar71xx: add LED driver for the RB750

[openwrt.git] / target / linux / ar71xx / files / arch / mips / pci / pci-ar724x.c

diff --git a/target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c b/target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c
index 0f9bd2f..5fcfc87 100644 (file)
--- a/target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c
+++ b/target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c
@@ -29,6 +29,7 @@
 
 static void __iomem *ar724x_pci_localcfg_base;
 static void __iomem *ar724x_pci_devcfg_base;
+static int ar724x_pci_fixup_enable;
 
 static DEFINE_SPINLOCK(ar724x_pci_lock);
 
@@ -75,7 +76,7 @@ static void ar724x_pci_write(void __iomem *base, int where, int size, u32 value)
                data |= ((value & 0xFF) << s);
                break;
        case 2:
-               s = ((where & 2) << 4);
+               s = ((where & 2) << 3);
                data &= ~(0xFFFF << s);
                data |= ((value & 0xFFFF) << s);
                break;
@@ -128,6 +129,26 @@ static int ar724x_pci_write_config(struct pci_bus *bus, unsigned int devfn,
        return PCIBIOS_SUCCESSFUL;
 }
 
+static void ar724x_pci_fixup(struct pci_dev *dev)
+{
+       u16 cmd;
+
+       if (!ar724x_pci_fixup_enable)
+               return;
+
+       if (dev->bus->number != 0 || dev->devfn != 0)
+               return;
+
+       /* setup COMMAND register */
+       pci_read_config_word(dev, PCI_COMMAND, &cmd);
+       cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
+              PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
+              PCI_COMMAND_FAST_BACK;
+
+       pci_write_config_word(dev, PCI_COMMAND, cmd);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ar724x_pci_fixup);
+
 int __init ar724x_pcibios_map_irq(const struct pci_dev *dev, uint8_t slot,
                                  uint8_t pin)
 {
@@ -179,22 +200,68 @@ static struct pci_controller ar724x_pci_controller = {
        .io_resource    = &ar724x_pci_io_resource,
 };
 
-int __init ar724x_pcibios_init(void)
+static void __init ar724x_pci_reset(void)
+{
+       ar71xx_device_stop(AR724X_RESET_PCIE);
+       ar71xx_device_stop(AR724X_RESET_PCIE_PHY);
+       ar71xx_device_stop(AR724X_RESET_PCIE_PHY_SERIAL);
+       udelay(100);
+
+       ar71xx_device_start(AR724X_RESET_PCIE_PHY_SERIAL);
+       udelay(100);
+       ar71xx_device_start(AR724X_RESET_PCIE_PHY);
+       ar71xx_device_start(AR724X_RESET_PCIE);
+}
+
+static int __init ar724x_pci_setup(void)
 {
        u32 t;
 
+       /* setup COMMAND register */
+       t = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE |
+           PCI_COMMAND_PARITY|PCI_COMMAND_SERR|PCI_COMMAND_FAST_BACK;
+
+       ar724x_pci_write(ar724x_pci_localcfg_base, PCI_COMMAND, 4, t);
+       ar724x_pci_write(ar724x_pci_localcfg_base, 0x20, 4, 0x1ff01000);
+       ar724x_pci_write(ar724x_pci_localcfg_base, 0x24, 4, 0x1ff01000);
+
+       t = ar724x_pci_rr(AR724X_PCI_REG_RESET);
+       if (t != 0x7) {
+               udelay(100000);
+               ar724x_pci_wr_nf(AR724X_PCI_REG_RESET, 0);
+               udelay(100);
+               ar724x_pci_wr_nf(AR724X_PCI_REG_RESET, 4);
+               udelay(100000);
+       }
+
+       ar724x_pci_wr(AR724X_PCI_REG_APP, AR724X_PCI_APP_LTSSM_ENABLE);
+       udelay(1000);
+
+       t = ar724x_pci_rr(AR724X_PCI_REG_APP);
+       if ((t & AR724X_PCI_APP_LTSSM_ENABLE) == 0x0) {
+               printk(KERN_WARNING "PCI: no PCIe module found\n");
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+int __init ar724x_pcibios_init(void)
+{
+       int ret;
+
        ar724x_pci_localcfg_base = ioremap_nocache(AR724X_PCI_CRP_BASE,
                                                   AR724X_PCI_CRP_SIZE);
 
        ar724x_pci_devcfg_base = ioremap_nocache(AR724X_PCI_CFG_BASE,
                                                 AR724X_PCI_CFG_SIZE);
 
-       /* setup COMMAND register */
-       t = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE |
-           PCI_COMMAND_PARITY | PCI_COMMAND_SERR | PCI_COMMAND_FAST_BACK;
-
-       ar724x_pci_write(ar724x_pci_localcfg_base, PCI_COMMAND, 4, t);
+       ar724x_pci_reset();
+       ret = ar724x_pci_setup();
+       if (ret)
+               return ret;
 
+       ar724x_pci_fixup_enable = 1;
        register_pci_controller(&ar724x_pci_controller);
 
        return 0;