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wifipineapple-openwrt/target/linux/ar71xx/patches-3.3/125-MIPS-ath79-add-IRQ-hand...

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From b16fdecf14d24fe213c81409c0c2dca66d5b7bc9 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Wed, 14 Mar 2012 10:45:25 +0100
Subject: [PATCH 30/47] 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>
Cc: linux-mips@linux-mips.org
Cc: mcgrof@infradead.org
Patchwork: https://patchwork.linux-mips.org/patch/3510/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
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)
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