ar71xx: add initial support for 3.2

Tested on the following boards:
  ALFA AP96
  TL-MR3220 v1
  TL-WR1043ND v1
  TL-WR2543ND v1
  TL-WR703N v1
  TL-WR741ND v1
  TL-WR741ND v4
  WNDR3700 v1
  WZR-HP-G300NH

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29868 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 190 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-3.2/127-MIPS-ath79-add-IRQ-handling-code-for-AR934X.patch b/target/linux/ar71xx/patches-3.2/127-MIPS-ath79-add-IRQ-handling-code-for-AR934X.patch
new file mode 100644
index 0000000000..083ca33189
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.2/127-MIPS-ath79-add-IRQ-handling-code-for-AR934X.patch
@@ -0,0 +1,190 @@
+From 9db6021011556948d2d28d6957cee451bc2985aa Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Fri, 9 Dec 2011 21:59:50 +0100
+Subject: [PATCH 27/35] MIPS: ath79: add IRQ handling code for AR934X
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Acked-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
+---
+ arch/mips/ath79/irq.c                          |   55 +++++++++++++++++++++++-
+ arch/mips/include/asm/mach-ath79/ar71xx_regs.h |   25 +++++++++++
+ arch/mips/include/asm/mach-ath79/irq.h         |    6 ++-
+ 3 files changed, 83 insertions(+), 3 deletions(-)
+
+--- a/arch/mips/ath79/irq.c
++++ b/arch/mips/ath79/irq.c
+@@ -1,10 +1,11 @@
+ /*
+  *  Atheros AR71xx/AR724x/AR913x specific interrupt handling
+  *
++ *  Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
+  *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+  *
+- *  Parts of this file are based on Atheros' 2.6.15 BSP
++ *  Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
+  *
+  *  This program is free software; you can redistribute it and/or modify it
+  *  under the terms of the GNU General Public License version 2 as published
+@@ -129,7 +130,7 @@ 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())
++	else if (soc_is_ar724x() || soc_is_ar933x() || soc_is_ar934x())
+ 		ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
+ 	else
+ 		BUG();
+@@ -143,6 +144,39 @@ static void __init ath79_misc_irq_init(v
+ 	irq_set_chained_handler(ATH79_CPU_IRQ_MISC, ath79_misc_irq_handler);
+ }
+ 
++static void ar934x_ip2_irq_dispatch(unsigned int irq, struct irq_desc *desc)
++{
++	u32 status;
++
++	disable_irq_nosync(irq);
++
++	status = ath79_reset_rr(AR934X_RESET_REG_PCIE_WMAC_INT_STATUS);
++
++	if (status & AR934X_PCIE_WMAC_INT_PCIE_ALL) {
++		ath79_ddr_wb_flush(AR934X_DDR_REG_FLUSH_PCIE);
++		generic_handle_irq(ATH79_IP2_IRQ(0));
++	} else if (status & AR934X_PCIE_WMAC_INT_WMAC_ALL) {
++		ath79_ddr_wb_flush(AR934X_DDR_REG_FLUSH_WMAC);
++		generic_handle_irq(ATH79_IP2_IRQ(1));
++	} else {
++		spurious_interrupt();
++	}
++
++	enable_irq(irq);
++}
++
++static void ar934x_ip2_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, ar934x_ip2_irq_dispatch);
++}
++
+ asmlinkage void plat_irq_dispatch(void)
+ {
+ 	unsigned long pending;
+@@ -202,6 +236,11 @@ 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);
+@@ -226,6 +265,12 @@ static void ar933x_ip3_handler(void)
+ 	do_IRQ(ATH79_CPU_IRQ_USB);
+ }
+ 
++static void ar934x_ip3_handler(void)
++{
++	ath79_ddr_wb_flush(AR934X_DDR_REG_FLUSH_USB);
++	do_IRQ(ATH79_CPU_IRQ_USB);
++}
++
+ void __init arch_init_irq(void)
+ {
+ 	if (soc_is_ar71xx()) {
+@@ -240,6 +285,9 @@ void __init arch_init_irq(void)
+ 	} else if (soc_is_ar933x()) {
+ 		ath79_ip2_handler = ar933x_ip2_handler;
+ 		ath79_ip3_handler = ar933x_ip3_handler;
++	} else if (soc_is_ar934x()) {
++		ath79_ip2_handler = ar934x_ip2_handler;
++		ath79_ip3_handler = ar934x_ip3_handler;
+ 	} else {
+ 		BUG();
+ 	}
+@@ -247,4 +295,7 @@ void __init arch_init_irq(void)
+ 	cp0_perfcount_irq = ATH79_MISC_IRQ_PERFC;
+ 	mips_cpu_irq_init();
+ 	ath79_misc_irq_init();
++
++	if (soc_is_ar934x())
++		ar934x_ip2_irq_init();
+ }
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+@@ -92,6 +92,12 @@
+ #define AR933X_DDR_REG_FLUSH_USB	0x84
+ #define AR933X_DDR_REG_FLUSH_WMAC	0x88
+ 
++#define AR934X_DDR_REG_FLUSH_GE0	0x9c
++#define AR934X_DDR_REG_FLUSH_GE1	0xa0
++#define AR934X_DDR_REG_FLUSH_USB	0xa4
++#define AR934X_DDR_REG_FLUSH_PCIE	0xa8
++#define AR934X_DDR_REG_FLUSH_WMAC	0xac
++
+ /*
+  * PLL block
+  */
+@@ -222,6 +228,7 @@
+ #define AR933X_RESET_REG_BOOTSTRAP		0xac
+ 
+ #define AR934X_RESET_REG_BOOTSTRAP		0xb0
++#define AR934X_RESET_REG_PCIE_WMAC_INT_STATUS	0xac
+ 
+ #define MISC_INT_ETHSW			BIT(12)
+ #define MISC_INT_TIMER4			BIT(10)
+@@ -295,6 +302,24 @@
+ #define AR934X_BOOTSTRAP_SDRAM_DISABLED	BIT(1)
+ #define AR934X_BOOTSTRAP_DDR1		BIT(0)
+ 
++#define AR934X_PCIE_WMAC_INT_WMAC_MISC		BIT(0)
++#define AR934X_PCIE_WMAC_INT_WMAC_TX		BIT(1)
++#define AR934X_PCIE_WMAC_INT_WMAC_RXLP		BIT(2)
++#define AR934X_PCIE_WMAC_INT_WMAC_RXHP		BIT(3)
++#define AR934X_PCIE_WMAC_INT_PCIE_RC		BIT(4)
++#define AR934X_PCIE_WMAC_INT_PCIE_RC0		BIT(5)
++#define AR934X_PCIE_WMAC_INT_PCIE_RC1		BIT(6)
++#define AR934X_PCIE_WMAC_INT_PCIE_RC2		BIT(7)
++#define AR934X_PCIE_WMAC_INT_PCIE_RC3		BIT(8)
++#define AR934X_PCIE_WMAC_INT_WMAC_ALL \
++	(AR934X_PCIE_WMAC_INT_WMAC_MISC | AR934X_PCIE_WMAC_INT_WMAC_TX | \
++	 AR934X_PCIE_WMAC_INT_WMAC_RXLP | AR934X_PCIE_WMAC_INT_WMAC_RXHP)
++
++#define AR934X_PCIE_WMAC_INT_PCIE_ALL \
++	(AR934X_PCIE_WMAC_INT_PCIE_RC | AR934X_PCIE_WMAC_INT_PCIE_RC0 | \
++	 AR934X_PCIE_WMAC_INT_PCIE_RC1 | AR934X_PCIE_WMAC_INT_PCIE_RC2 | \
++	 AR934X_PCIE_WMAC_INT_PCIE_RC3)
++
+ #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			46
++#define NR_IRQS			48
+ 
+ #define ATH79_MISC_IRQ_BASE	8
+ #define ATH79_MISC_IRQ_COUNT	32
+@@ -19,6 +19,10 @@
+ #define ATH79_PCI_IRQ_COUNT	6
+ #define ATH79_PCI_IRQ(_x)	(ATH79_PCI_IRQ_BASE + (_x))
+ 
++#define ATH79_IP2_IRQ_BASE	(ATH79_PCI_IRQ_BASE + ATH79_PCI_IRQ_COUNT)
++#define ATH79_IP2_IRQ_COUNT	2
++#define ATH79_IP2_IRQ(_x)	(ATH79_IP2_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_GE0	(MIPS_CPU_IRQ_BASE + 4)