ar71xx: add an irq parameter for ar724x_pcibios_init

[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 5fcfc87..57daa06 100644 (file)
--- a/target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c
+++ b/target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR724x PCI host controller driver
  *
 /*
  *  Atheros AR724x PCI host controller driver
  *

- *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>

  *
  *  Parts of this file are based on Atheros' 2.6.15 BSP
  *
  *
  *  Parts of this file are based on Atheros' 2.6.15 BSP
  *


@@ -16,6 +16,7 @@
 #include <linux/bitops.h>
 #include <linux/pci.h>
 #include <linux/pci_regs.h>
 #include <linux/bitops.h>
 #include <linux/pci.h>
 #include <linux/pci_regs.h>

+#include <linux/interrupt.h>

 
 #include <asm/mach-ar71xx/ar71xx.h>
 #include <asm/mach-ar71xx/pci.h>
 
 #include <asm/mach-ar71xx/ar71xx.h>
 #include <asm/mach-ar71xx/pci.h>


@@ -29,6 +30,7 @@
 
 static void __iomem *ar724x_pci_localcfg_base;
 static void __iomem *ar724x_pci_devcfg_base;
 
 static void __iomem *ar724x_pci_localcfg_base;
 static void __iomem *ar724x_pci_devcfg_base;

+static void __iomem *ar724x_pci_ctrl_base;

 static int ar724x_pci_fixup_enable;
 
 static DEFINE_SPINLOCK(ar724x_pci_lock);
 static int ar724x_pci_fixup_enable;
 
 static DEFINE_SPINLOCK(ar724x_pci_lock);


@@ -108,8 +110,11 @@ static int ar724x_pci_read_config(struct pci_bus *bus, unsigned int devfn,
         * WAR for BAR issue - We are unable to access the PCI device space
         * if we set the BAR with proper base address
         */
         * WAR for BAR issue - We are unable to access the PCI device space
         * if we set the BAR with proper base address
         */

-       if ((where == 0x10) && (size == 4))
-               ar724x_pci_write(ar724x_pci_devcfg_base, where, size, 0xffff);
+       if ((where == 0x10) && (size == 4)) {
+               u32 val;
+               val = (ar71xx_soc == AR71XX_SOC_AR7240) ? 0xffff : 0x1000ffff;
+               ar724x_pci_write(ar724x_pci_devcfg_base, where, size, val);
+       }

 
        return PCIBIOS_SUCCESSFUL;
 }
 
        return PCIBIOS_SUCCESSFUL;
 }


@@ -215,6 +220,7 @@ static void __init ar724x_pci_reset(void)
 
 static int __init ar724x_pci_setup(void)
 {
 
 static int __init ar724x_pci_setup(void)
 {

+       void __iomem *base = ar724x_pci_ctrl_base;

        u32 t;
 
        /* setup COMMAND register */
        u32 t;
 
        /* setup COMMAND register */


@@ -225,44 +231,159 @@ static int __init ar724x_pci_setup(void)
        ar724x_pci_write(ar724x_pci_localcfg_base, 0x20, 4, 0x1ff01000);
        ar724x_pci_write(ar724x_pci_localcfg_base, 0x24, 4, 0x1ff01000);
 
        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);
+       t = __raw_readl(base + AR724X_PCI_REG_RESET);

        if (t != 0x7) {
                udelay(100000);
        if (t != 0x7) {
                udelay(100000);

-               ar724x_pci_wr_nf(AR724X_PCI_REG_RESET, 0);
+               __raw_writel(0, base + AR724X_PCI_REG_RESET);

                udelay(100);
                udelay(100);

-               ar724x_pci_wr_nf(AR724X_PCI_REG_RESET, 4);
+               __raw_writel(4, base + AR724X_PCI_REG_RESET);

                udelay(100000);
        }
 
                udelay(100000);
        }
 

-       ar724x_pci_wr(AR724X_PCI_REG_APP, AR724X_PCI_APP_LTSSM_ENABLE);
+       if (ar71xx_soc == AR71XX_SOC_AR7240)
+               t = AR724X_PCI_APP_LTSSM_ENABLE;
+       else
+               t = 0x1ffc1;
+       __raw_writel(t, base + AR724X_PCI_REG_APP);
+       /* flush write */
+       (void) __raw_readl(base + AR724X_PCI_REG_APP);

        udelay(1000);
 
        udelay(1000);
 

-       t = ar724x_pci_rr(AR724X_PCI_REG_APP);
-       if ((t & AR724X_PCI_APP_LTSSM_ENABLE) == 0x0) {
+       t = __raw_readl(base + AR724X_PCI_REG_RESET);
+       if ((t & AR724X_PCI_RESET_LINK_UP) == 0x0) {

                printk(KERN_WARNING "PCI: no PCIe module found\n");
                return -ENODEV;
        }
 
                printk(KERN_WARNING "PCI: no PCIe module found\n");
                return -ENODEV;
        }
 

+       if (ar71xx_soc == AR71XX_SOC_AR7241 ||
+           ar71xx_soc == AR71XX_SOC_AR7242) {
+               t = __raw_readl(base + AR724X_PCI_REG_APP);
+               t |= BIT(16);
+               __raw_writel(t, base + AR724X_PCI_REG_APP);
+       }
+

        return 0;
 }
 
        return 0;
 }
 

-int __init ar724x_pcibios_init(void)
+static void ar724x_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+       void __iomem *base = ar724x_pci_ctrl_base;
+       u32 pending;
+
+       pending = __raw_readl(base + AR724X_PCI_REG_INT_STATUS) &
+                 __raw_readl(base + AR724X_PCI_REG_INT_MASK);
+
+       if (pending & AR724X_PCI_INT_DEV0)
+               generic_handle_irq(AR71XX_PCI_IRQ_DEV0);
+
+       else
+               spurious_interrupt();
+}
+
+static void ar724x_pci_irq_unmask(struct irq_data *d)
+{
+       void __iomem *base = ar724x_pci_ctrl_base;
+       u32 t;
+
+       switch (d->irq) {
+       case AR71XX_PCI_IRQ_DEV0:
+               t = __raw_readl(base + AR724X_PCI_REG_INT_MASK);
+               __raw_writel(t | AR724X_PCI_INT_DEV0,
+                            base + AR724X_PCI_REG_INT_MASK);
+               /* flush write */
+               (void) __raw_readl(base + AR724X_PCI_REG_INT_MASK);
+       }
+}
+
+static void ar724x_pci_irq_mask(struct irq_data *d)
+{
+       void __iomem *base = ar724x_pci_ctrl_base;
+       u32 t;
+
+       switch (d->irq) {
+       case AR71XX_PCI_IRQ_DEV0:
+               t = __raw_readl(base + AR724X_PCI_REG_INT_MASK);
+               __raw_writel(t & ~AR724X_PCI_INT_DEV0,
+                            base + AR724X_PCI_REG_INT_MASK);
+
+               /* flush write */
+               (void) __raw_readl(base + AR724X_PCI_REG_INT_MASK);
+
+               t = __raw_readl(base + AR724X_PCI_REG_INT_STATUS);
+               __raw_writel(t | AR724X_PCI_INT_DEV0,
+                            base + AR724X_PCI_REG_INT_STATUS);
+
+               /* flush write */
+               (void) __raw_readl(base + AR724X_PCI_REG_INT_STATUS);
+       }
+}
+
+static struct irq_chip ar724x_pci_irq_chip = {
+       .name           = "AR724X PCI ",
+       .irq_mask       = ar724x_pci_irq_mask,
+       .irq_unmask     = ar724x_pci_irq_unmask,
+       .irq_mask_ack   = ar724x_pci_irq_mask,
+};
+
+static void __init ar724x_pci_irq_init(int irq)

 {
 {

-       int ret;
+       void __iomem *base = ar724x_pci_ctrl_base;
+       u32 t;
+       int i;
+
+       t = ar71xx_reset_rr(AR724X_RESET_REG_RESET_MODULE);
+       if (t & (AR724X_RESET_PCIE | AR724X_RESET_PCIE_PHY |
+                AR724X_RESET_PCIE_PHY_SERIAL)) {
+               return;
+       }
+
+       __raw_writel(0, base + AR724X_PCI_REG_INT_MASK);
+       __raw_writel(0, base + AR724X_PCI_REG_INT_STATUS);
+
+       for (i = AR71XX_PCI_IRQ_BASE;
+            i < AR71XX_PCI_IRQ_BASE + AR71XX_PCI_IRQ_COUNT; i++)
+               irq_set_chip_and_handler(i, &ar724x_pci_irq_chip,
+                                        handle_level_irq);
+
+       irq_set_chained_handler(irq, ar724x_pci_irq_handler);
+}
+
+int __init ar724x_pcibios_init(int irq)
+{
+       int ret = -ENOMEM;

 
        ar724x_pci_localcfg_base = ioremap_nocache(AR724X_PCI_CRP_BASE,
                                                   AR724X_PCI_CRP_SIZE);
 
        ar724x_pci_localcfg_base = ioremap_nocache(AR724X_PCI_CRP_BASE,
                                                   AR724X_PCI_CRP_SIZE);

+       if (ar724x_pci_localcfg_base == NULL)
+               goto err;

 
        ar724x_pci_devcfg_base = ioremap_nocache(AR724X_PCI_CFG_BASE,
                                                 AR724X_PCI_CFG_SIZE);
 
        ar724x_pci_devcfg_base = ioremap_nocache(AR724X_PCI_CFG_BASE,
                                                 AR724X_PCI_CFG_SIZE);

+       if (ar724x_pci_devcfg_base == NULL)
+               goto err_unmap_localcfg;
+
+       ar724x_pci_ctrl_base = ioremap_nocache(AR724X_PCI_CTRL_BASE,
+                                              AR724X_PCI_CTRL_SIZE);
+       if (ar724x_pci_ctrl_base == NULL)
+               goto err_unmap_devcfg;

 
        ar724x_pci_reset();
        ret = ar724x_pci_setup();
        if (ret)
 
        ar724x_pci_reset();
        ret = ar724x_pci_setup();
        if (ret)

-               return ret;
+               goto err_unmap_ctrl;

 
        ar724x_pci_fixup_enable = 1;
 
        ar724x_pci_fixup_enable = 1;

+       ar724x_pci_irq_init(irq);

        register_pci_controller(&ar724x_pci_controller);
 
        return 0;
        register_pci_controller(&ar724x_pci_controller);
 
        return 0;

+
+err_unmap_ctrl:
+       iounmap(ar724x_pci_ctrl_base);
+err_unmap_devcfg:
+       iounmap(ar724x_pci_devcfg_base);
+err_unmap_localcfg:
+       iounmap(ar724x_pci_localcfg_base);
+err:
+       return ret;

 }
 }