aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx/patches-3.8/031-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/ar71xx/patches-3.8/031-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch')
-rw-r--r--target/linux/ar71xx/patches-3.8/031-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch246
1 files changed, 246 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.8/031-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch b/target/linux/ar71xx/patches-3.8/031-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch
new file mode 100644
index 0000000000..dd79fa9415
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.8/031-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch
@@ -0,0 +1,246 @@
+From f1c0239d61d6d43469133d144e458f485b6cbda6 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Fri, 15 Feb 2013 18:53:47 +0000
+Subject: [PATCH] MIPS: ath79: add IRQ handling code for the QCA955X SoCs
+
+commit 53330332f176eaa9567481c69bbad8b2176b4eb5 upstream.
+
+The IRQ routing in the QCA955x SoCs is slightly
+different from the routing implemented in the
+already supported SoCs.
+
+Cc: Rodriguez, Luis <rodrigue@qca.qualcomm.com>
+Cc: Giori, Kathy <kgiori@qca.qualcomm.com>
+Cc: QCA Linux Team <qca-linux-team@qca.qualcomm.com>
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Patchwork: http://patchwork.linux-mips.org/patch/4955/
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ath79/irq.c | 110 ++++++++++++++++++++++--
+ arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 32 +++++++
+ arch/mips/include/asm/mach-ath79/irq.h | 6 +-
+ 3 files changed, 140 insertions(+), 8 deletions(-)
+
+--- a/arch/mips/ath79/irq.c
++++ b/arch/mips/ath79/irq.c
+@@ -103,7 +103,10 @@ static void __init ath79_misc_irq_init(v
+
+ if (soc_is_ar71xx() || soc_is_ar913x())
+ ath79_misc_irq_chip.irq_mask_ack = ar71xx_misc_irq_mask;
+- else if (soc_is_ar724x() || soc_is_ar933x() || soc_is_ar934x())
++ else if (soc_is_ar724x() ||
++ soc_is_ar933x() ||
++ soc_is_ar934x() ||
++ soc_is_qca955x())
+ ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
+ else
+ BUG();
+@@ -150,6 +153,88 @@ static void ar934x_ip2_irq_init(void)
+ irq_set_chained_handler(ATH79_CPU_IRQ(2), ar934x_ip2_irq_dispatch);
+ }
+
++static void qca955x_ip2_irq_dispatch(unsigned int irq, struct irq_desc *desc)
++{
++ u32 status;
++
++ disable_irq_nosync(irq);
++
++ status = ath79_reset_rr(QCA955X_RESET_REG_EXT_INT_STATUS);
++ status &= QCA955X_EXT_INT_PCIE_RC1_ALL | QCA955X_EXT_INT_WMAC_ALL;
++
++ if (status == 0) {
++ spurious_interrupt();
++ goto enable;
++ }
++
++ if (status & QCA955X_EXT_INT_PCIE_RC1_ALL) {
++ /* TODO: flush DDR? */
++ generic_handle_irq(ATH79_IP2_IRQ(0));
++ }
++
++ if (status & QCA955X_EXT_INT_WMAC_ALL) {
++ /* TODO: flush DDR? */
++ generic_handle_irq(ATH79_IP2_IRQ(1));
++ }
++
++enable:
++ enable_irq(irq);
++}
++
++static void qca955x_ip3_irq_dispatch(unsigned int irq, struct irq_desc *desc)
++{
++ u32 status;
++
++ disable_irq_nosync(irq);
++
++ status = ath79_reset_rr(QCA955X_RESET_REG_EXT_INT_STATUS);
++ status &= QCA955X_EXT_INT_PCIE_RC2_ALL |
++ QCA955X_EXT_INT_USB1 |
++ QCA955X_EXT_INT_USB2;
++
++ if (status == 0) {
++ spurious_interrupt();
++ goto enable;
++ }
++
++ if (status & QCA955X_EXT_INT_USB1) {
++ /* TODO: flush DDR? */
++ generic_handle_irq(ATH79_IP3_IRQ(0));
++ }
++
++ if (status & QCA955X_EXT_INT_USB2) {
++ /* TODO: flush DDR? */
++ generic_handle_irq(ATH79_IP3_IRQ(1));
++ }
++
++ if (status & QCA955X_EXT_INT_PCIE_RC2_ALL) {
++ /* TODO: flush DDR? */
++ generic_handle_irq(ATH79_IP3_IRQ(2));
++ }
++
++enable:
++ enable_irq(irq);
++}
++
++static void qca955x_irq_init(void)
++{
++ int i;
++
++ for (i = ATH79_IP2_IRQ_BASE;
++ i < ATH79_IP2_IRQ_BASE + ATH79_IP2_IRQ_COUNT; i++)
++ irq_set_chip_and_handler(i, &dummy_irq_chip,
++ handle_level_irq);
++
++ irq_set_chained_handler(ATH79_CPU_IRQ(2), qca955x_ip2_irq_dispatch);
++
++ for (i = ATH79_IP3_IRQ_BASE;
++ i < ATH79_IP3_IRQ_BASE + ATH79_IP3_IRQ_COUNT; i++)
++ irq_set_chip_and_handler(i, &dummy_irq_chip,
++ handle_level_irq);
++
++ irq_set_chained_handler(ATH79_CPU_IRQ(3), qca955x_ip3_irq_dispatch);
++}
++
+ asmlinkage void plat_irq_dispatch(void)
+ {
+ unsigned long pending;
+@@ -185,6 +270,17 @@ asmlinkage void plat_irq_dispatch(void)
+ * Issue a flush in the handlers to ensure that the driver sees
+ * the update.
+ */
++
++static void ath79_default_ip2_handler(void)
++{
++ do_IRQ(ATH79_CPU_IRQ(2));
++}
++
++static void ath79_default_ip3_handler(void)
++{
++ do_IRQ(ATH79_CPU_IRQ(3));
++}
++
+ static void ar71xx_ip2_handler(void)
+ {
+ ath79_ddr_wb_flush(AR71XX_DDR_REG_FLUSH_PCI);
+@@ -209,11 +305,6 @@ static void ar933x_ip2_handler(void)
+ do_IRQ(ATH79_CPU_IRQ(2));
+ }
+
+-static void ar934x_ip2_handler(void)
+-{
+- do_IRQ(ATH79_CPU_IRQ(2));
+-}
+-
+ static void ar71xx_ip3_handler(void)
+ {
+ ath79_ddr_wb_flush(AR71XX_DDR_REG_FLUSH_USB);
+@@ -259,8 +350,11 @@ void __init arch_init_irq(void)
+ ath79_ip2_handler = ar933x_ip2_handler;
+ ath79_ip3_handler = ar933x_ip3_handler;
+ } else if (soc_is_ar934x()) {
+- ath79_ip2_handler = ar934x_ip2_handler;
++ ath79_ip2_handler = ath79_default_ip2_handler;
+ ath79_ip3_handler = ar934x_ip3_handler;
++ } else if (soc_is_qca955x()) {
++ ath79_ip2_handler = ath79_default_ip2_handler;
++ ath79_ip3_handler = ath79_default_ip3_handler;
+ } else {
+ BUG();
+ }
+@@ -271,4 +365,6 @@ void __init arch_init_irq(void)
+
+ if (soc_is_ar934x())
+ ar934x_ip2_irq_init();
++ else if (soc_is_qca955x())
++ qca955x_irq_init();
+ }
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+@@ -300,6 +300,7 @@
+ #define AR934X_RESET_REG_PCIE_WMAC_INT_STATUS 0xac
+
+ #define QCA955X_RESET_REG_BOOTSTRAP 0xb0
++#define QCA955X_RESET_REG_EXT_INT_STATUS 0xac
+
+ #define MISC_INT_ETHSW BIT(12)
+ #define MISC_INT_TIMER4 BIT(10)
+@@ -398,6 +399,37 @@
+ AR934X_PCIE_WMAC_INT_PCIE_RC1 | AR934X_PCIE_WMAC_INT_PCIE_RC2 | \
+ AR934X_PCIE_WMAC_INT_PCIE_RC3)
+
++#define QCA955X_EXT_INT_WMAC_MISC BIT(0)
++#define QCA955X_EXT_INT_WMAC_TX BIT(1)
++#define QCA955X_EXT_INT_WMAC_RXLP BIT(2)
++#define QCA955X_EXT_INT_WMAC_RXHP BIT(3)
++#define QCA955X_EXT_INT_PCIE_RC1 BIT(4)
++#define QCA955X_EXT_INT_PCIE_RC1_INT0 BIT(5)
++#define QCA955X_EXT_INT_PCIE_RC1_INT1 BIT(6)
++#define QCA955X_EXT_INT_PCIE_RC1_INT2 BIT(7)
++#define QCA955X_EXT_INT_PCIE_RC1_INT3 BIT(8)
++#define QCA955X_EXT_INT_PCIE_RC2 BIT(12)
++#define QCA955X_EXT_INT_PCIE_RC2_INT0 BIT(13)
++#define QCA955X_EXT_INT_PCIE_RC2_INT1 BIT(14)
++#define QCA955X_EXT_INT_PCIE_RC2_INT2 BIT(15)
++#define QCA955X_EXT_INT_PCIE_RC2_INT3 BIT(16)
++#define QCA955X_EXT_INT_USB1 BIT(24)
++#define QCA955X_EXT_INT_USB2 BIT(28)
++
++#define QCA955X_EXT_INT_WMAC_ALL \
++ (QCA955X_EXT_INT_WMAC_MISC | QCA955X_EXT_INT_WMAC_TX | \
++ QCA955X_EXT_INT_WMAC_RXLP | QCA955X_EXT_INT_WMAC_RXHP)
++
++#define QCA955X_EXT_INT_PCIE_RC1_ALL \
++ (QCA955X_EXT_INT_PCIE_RC1 | QCA955X_EXT_INT_PCIE_RC1_INT0 | \
++ QCA955X_EXT_INT_PCIE_RC1_INT1 | QCA955X_EXT_INT_PCIE_RC1_INT2 | \
++ QCA955X_EXT_INT_PCIE_RC1_INT3)
++
++#define QCA955X_EXT_INT_PCIE_RC2_ALL \
++ (QCA955X_EXT_INT_PCIE_RC2 | QCA955X_EXT_INT_PCIE_RC2_INT0 | \
++ QCA955X_EXT_INT_PCIE_RC2_INT1 | QCA955X_EXT_INT_PCIE_RC2_INT2 | \
++ QCA955X_EXT_INT_PCIE_RC2_INT3)
++
+ #define REV_ID_MAJOR_MASK 0xfff0
+ #define REV_ID_MAJOR_AR71XX 0x00a0
+ #define REV_ID_MAJOR_AR913X 0x00b0
+--- a/arch/mips/include/asm/mach-ath79/irq.h
++++ b/arch/mips/include/asm/mach-ath79/irq.h
+@@ -10,7 +10,7 @@
+ #define __ASM_MACH_ATH79_IRQ_H
+
+ #define MIPS_CPU_IRQ_BASE 0
+-#define NR_IRQS 48
++#define NR_IRQS 51
+
+ #define ATH79_CPU_IRQ(_x) (MIPS_CPU_IRQ_BASE + (_x))
+
+@@ -26,6 +26,10 @@
+ #define ATH79_IP2_IRQ_COUNT 2
+ #define ATH79_IP2_IRQ(_x) (ATH79_IP2_IRQ_BASE + (_x))
+
++#define ATH79_IP3_IRQ_BASE (ATH79_IP2_IRQ_BASE + ATH79_IP2_IRQ_COUNT)
++#define ATH79_IP3_IRQ_COUNT 3
++#define ATH79_IP3_IRQ(_x) (ATH79_IP3_IRQ_BASE + (_x))
++
+ #include_next <irq.h>
+
+ #endif /* __ASM_MACH_ATH79_IRQ_H */