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openwrt/target/linux/ar71xx/patches-3.3/163-MIPS-ath79-add-IRQ-hand...

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From 5d0de52f8e36916485a61b820916b71b5d918e6f Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Sun, 24 Jun 2012 13:44:23 +0200
Subject: [PATCH 19/34] MIPS: ath79: add IRQ handling code for the QCA955X SoCs
Signed-off-by: Gabor Juhos <juhosg@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 | 9 ++-
3 files changed, 142 insertions(+), 9 deletions(-)
--- a/arch/mips/ath79/irq.c
+++ b/arch/mips/ath79/irq.c
@@ -130,7 +130,10 @@ 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();
@@ -177,6 +180,88 @@ static void ar934x_ip2_irq_init(void)
irq_set_chained_handler(ATH79_CPU_IRQ_IP2, 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: flsuh 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: flsuh 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_IP2, 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_IP3, qca955x_ip3_irq_dispatch);
+}
+
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
@@ -212,6 +297,17 @@ 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_IP2);
+}
+
+static void ath79_default_ip3_handler(void)
+{
+ do_IRQ(ATH79_CPU_IRQ_USB);
+}
+
static void ar71xx_ip2_handler(void)
{
ath79_ddr_wb_flush(AR71XX_DDR_REG_FLUSH_PCI);
@@ -236,11 +332,6 @@ static void ar933x_ip2_handler(void)
do_IRQ(ATH79_CPU_IRQ_IP2);
}
-static void ar934x_ip2_handler(void)
-{
- do_IRQ(ATH79_CPU_IRQ_IP2);
-}
-
static void ar71xx_ip3_handler(void)
{
ath79_ddr_wb_flush(AR71XX_DDR_REG_FLUSH_USB);
@@ -286,8 +377,11 @@ 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();
}
@@ -298,4 +392,6 @@ 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
@@ -298,6 +298,7 @@
#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)
@@ -396,6 +397,37 @@
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_MISC_IRQ_BASE 8
#define ATH79_MISC_IRQ_COUNT 32
@@ -23,8 +23,13 @@
#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))
+
#define ATH79_CPU_IRQ_IP2 (MIPS_CPU_IRQ_BASE + 2)
-#define ATH79_CPU_IRQ_USB (MIPS_CPU_IRQ_BASE + 3)
+#define ATH79_CPU_IRQ_IP3 (MIPS_CPU_IRQ_BASE + 3)
+#define ATH79_CPU_IRQ_USB ATH79_CPU_IRQ_IP3
#define ATH79_CPU_IRQ_GE0 (MIPS_CPU_IRQ_BASE + 4)
#define ATH79_CPU_IRQ_GE1 (MIPS_CPU_IRQ_BASE + 5)
#define ATH79_CPU_IRQ_MISC (MIPS_CPU_IRQ_BASE + 6)
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