ar71xx: add initial support for the QCA955X SoCs

SVN-Revision: 32606

1 files changed, 239 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-3.3/163-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch b/target/linux/ar71xx/patches-3.3/163-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch
new file mode 100644
index 0000000..e4e2c30
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.3/163-MIPS-ath79-add-IRQ-handling-code-for-the-QCA955X-SoC.patch
@@ -0,0 +1,239 @@
+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)