diff options
author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-05 13:56:35 +0000 |
---|---|---|
committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-05 13:56:35 +0000 |
commit | 1c9cad5dceee0e2484e92ce5a713af0b0d48f3cf (patch) | |
tree | 25df3242012dae591772527f4b112abf5c27f669 /target/linux/ar71xx/patches-3.3/113-MIPS-ath79-add-PCI-IRQ-handling-code-for-AR724X-SoCs.patch | |
parent | c39d550e2f590b28cea8cc708621c052a33c6c85 (diff) |
ar71xx: update 3.3 patches
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31602 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/113-MIPS-ath79-add-PCI-IRQ-handling-code-for-AR724X-SoCs.patch')
-rw-r--r-- | target/linux/ar71xx/patches-3.3/113-MIPS-ath79-add-PCI-IRQ-handling-code-for-AR724X-SoCs.patch | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/target/linux/ar71xx/patches-3.3/113-MIPS-ath79-add-PCI-IRQ-handling-code-for-AR724X-SoCs.patch b/target/linux/ar71xx/patches-3.3/113-MIPS-ath79-add-PCI-IRQ-handling-code-for-AR724X-SoCs.patch deleted file mode 100644 index 6da2df499..000000000 --- a/target/linux/ar71xx/patches-3.3/113-MIPS-ath79-add-PCI-IRQ-handling-code-for-AR724X-SoCs.patch +++ /dev/null @@ -1,213 +0,0 @@ -From a4fbc2dec67a5d760e25e3c3a6c392191a5405c6 Mon Sep 17 00:00:00 2001 -From: Gabor Juhos <juhosg@openwrt.org> -Date: Tue, 22 Nov 2011 14:11:19 +0100 -Subject: [PATCH 13/35] MIPS: ath79: add PCI IRQ handling code for AR724X SoCs - -The PCI Host Controller of the AR724x SoC has a -built-in IRQ controller. The current code does -not supports that, so the IRQ lines wired to this -controller are not usable. This leads to failed -'request_irq' calls: - - ath9k 0000:00:00.0: request_irq failed - ath9k: probe of 0000:00:00.0 failed with error -89 - -This patch adds support for the IRQ controller -in order to make PCI IRQs work. - -Signed-off-by: Gabor Juhos <juhosg@openwrt.org> - -v2: - move the interrupt controller related defines from - the workaround patch ---- - arch/mips/ath79/pci.c | 3 +- - arch/mips/include/asm/mach-ath79/pci.h | 4 +- - arch/mips/pci/pci-ar724x.c | 118 +++++++++++++++++++++++++++++++- - 3 files changed, 120 insertions(+), 5 deletions(-) - ---- a/arch/mips/ath79/pci.c -+++ b/arch/mips/ath79/pci.c -@@ -10,6 +10,7 @@ - - #include <linux/pci.h> - #include <asm/mach-ath79/ath79.h> -+#include <asm/mach-ath79/irq.h> - #include <asm/mach-ath79/pci.h> - #include "pci.h" - -@@ -50,7 +51,7 @@ int pcibios_plat_dev_init(struct pci_dev - int __init ath79_register_pci(void) - { - if (soc_is_ar724x()) -- return ar724x_pcibios_init(); -+ return ar724x_pcibios_init(ATH79_CPU_IRQ_IP2); - - return -ENODEV; - } ---- a/arch/mips/include/asm/mach-ath79/pci.h -+++ b/arch/mips/include/asm/mach-ath79/pci.h -@@ -12,9 +12,9 @@ - #define __ASM_MACH_ATH79_PCI_H - - #if defined(CONFIG_PCI) && defined(CONFIG_SOC_AR724X) --int ar724x_pcibios_init(void); -+int ar724x_pcibios_init(int irq); - #else --static inline int ar724x_pcibios_init(void) { return 0 }; -+static inline int ar724x_pcibios_init(int irq) { return 0 }; - #endif - - #endif /* __ASM_MACH_ATH79_PCI_H */ ---- a/arch/mips/pci/pci-ar724x.c -+++ b/arch/mips/pci/pci-ar724x.c -@@ -8,19 +8,32 @@ - * by the Free Software Foundation. - */ - -+#include <linux/irq.h> - #include <linux/pci.h> - #include <asm/mach-ath79/ath79.h> -+#include <asm/mach-ath79/ar71xx_regs.h> - #include <asm/mach-ath79/pci.h> - - #define AR724X_PCI_CFG_BASE 0x14000000 - #define AR724X_PCI_CFG_SIZE 0x1000 -+#define AR724X_PCI_CTRL_BASE (AR71XX_APB_BASE + 0x000f0000) -+#define AR724X_PCI_CTRL_SIZE 0x100 -+ - #define AR724X_PCI_MEM_BASE 0x10000000 - #define AR724X_PCI_MEM_SIZE 0x08000000 - -+#define AR724X_PCI_REG_INT_STATUS 0x4c -+#define AR724X_PCI_REG_INT_MASK 0x50 -+ -+#define AR724X_PCI_INT_DEV0 BIT(14) -+ -+#define AR724X_PCI_IRQ_COUNT 1 -+ - #define AR7240_BAR0_WAR_VALUE 0xffff - - static DEFINE_SPINLOCK(ar724x_pci_lock); - static void __iomem *ar724x_pci_devcfg_base; -+static void __iomem *ar724x_pci_ctrl_base; - - static u32 ar724x_pci_bar0_value; - static bool ar724x_pci_bar0_is_cached; -@@ -164,14 +177,115 @@ static struct pci_controller ar724x_pci_ - .mem_resource = &ar724x_mem_resource, - }; - --int __init ar724x_pcibios_init(void) -+static void ar724x_pci_irq_handler(unsigned int irq, struct irq_desc *desc) -+{ -+ void __iomem *base; -+ u32 pending; -+ -+ base = ar724x_pci_ctrl_base; -+ -+ 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(ATH79_PCI_IRQ(0)); -+ -+ else -+ spurious_interrupt(); -+} -+ -+static void ar724x_pci_irq_unmask(struct irq_data *d) -+{ -+ void __iomem *base; -+ u32 t; -+ -+ base = ar724x_pci_ctrl_base; -+ -+ switch (d->irq) { -+ case ATH79_PCI_IRQ(0): -+ t = __raw_readl(base + AR724X_PCI_REG_INT_MASK); -+ __raw_writel(t | AR724X_PCI_INT_DEV0, -+ base + AR724X_PCI_REG_INT_MASK); -+ /* flush write */ -+ __raw_readl(base + AR724X_PCI_REG_INT_MASK); -+ } -+} -+ -+static void ar724x_pci_irq_mask(struct irq_data *d) -+{ -+ void __iomem *base; -+ u32 t; -+ -+ base = ar724x_pci_ctrl_base; -+ -+ switch (d->irq) { -+ case ATH79_PCI_IRQ(0): -+ t = __raw_readl(base + AR724X_PCI_REG_INT_MASK); -+ __raw_writel(t & ~AR724X_PCI_INT_DEV0, -+ base + AR724X_PCI_REG_INT_MASK); -+ -+ /* flush write */ -+ __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 */ -+ __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) -+{ -+ void __iomem *base; -+ int i; -+ -+ base = ar724x_pci_ctrl_base; -+ -+ __raw_writel(0, base + AR724X_PCI_REG_INT_MASK); -+ __raw_writel(0, base + AR724X_PCI_REG_INT_STATUS); -+ -+ BUILD_BUG_ON(ATH79_PCI_IRQ_COUNT < AR724X_PCI_IRQ_COUNT); -+ -+ for (i = ATH79_PCI_IRQ_BASE; -+ i < ATH79_PCI_IRQ_BASE + AR724X_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; -+ -+ ret = -ENOMEM; -+ - ar724x_pci_devcfg_base = ioremap(AR724X_PCI_CFG_BASE, - AR724X_PCI_CFG_SIZE); - if (ar724x_pci_devcfg_base == NULL) -- return -ENOMEM; -+ goto err; - -+ ar724x_pci_ctrl_base = ioremap(AR724X_PCI_CTRL_BASE, -+ AR724X_PCI_CTRL_SIZE); -+ if (ar724x_pci_ctrl_base == NULL) -+ goto err_unmap_devcfg; -+ -+ ar724x_pci_irq_init(irq); - register_pci_controller(&ar724x_pci_controller); - - return PCIBIOS_SUCCESSFUL; -+ -+err_unmap_devcfg: -+ iounmap(ar724x_pci_devcfg_base); -+err: -+ return ret; - } |