From 546895e93802cf1899d25bf5fd52d217d8e7af1a Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Mon, 14 Nov 2011 11:49:51 +0000
Subject: [PATCH] ar71xx: use a dummy irq chip for WMAC and PCIe irq hadling

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29107 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../files/arch/mips/ar71xx/dev-ar9xxx-wmac.c  |  2 +
 .../linux/ar71xx/files/arch/mips/ar71xx/irq.c | 38 +++++++++++++++++++
 .../linux/ar71xx/files/arch/mips/ar71xx/pci.c |  5 ++-
 .../mips/include/asm/mach-ar71xx/ar71xx.h     |  7 +++-
 4 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/dev-ar9xxx-wmac.c b/target/linux/ar71xx/files/arch/mips/ar71xx/dev-ar9xxx-wmac.c
index e5cd4d3ff4..90db388967 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/dev-ar9xxx-wmac.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/dev-ar9xxx-wmac.c
@@ -114,6 +114,8 @@ static void ar934x_wmac_init(void)
 	ar9xxx_wmac_device.name = "ar934x_wmac";
 	ar9xxx_wmac_resources[0].start = AR934X_WMAC_BASE;
 	ar9xxx_wmac_resources[0].end = AR934X_WMAC_BASE + AR934X_WMAC_SIZE - 1;
+	ar9xxx_wmac_resources[1].start = AR934X_IP2_IRQ_WMAC;
+	ar9xxx_wmac_resources[1].start = AR934X_IP2_IRQ_WMAC;
 	if (ar71xx_ref_freq == MHZ_25)
 		ar9xxx_wmac_data.is_clk_25mhz = true;
 }
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c b/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c
index ff39d3a972..7165ca97db 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c
@@ -231,6 +231,39 @@ static void __init ar71xx_misc_irq_init(void)
 	setup_irq(AR71XX_CPU_IRQ_MISC, &ar71xx_misc_irqaction);
 }
 
+static void ar934x_ip2_irq_dispatch(unsigned int irq, struct irq_desc *desc)
+{
+	u32 status;
+
+	disable_irq_nosync(irq);
+
+	status = ar71xx_reset_rr(AR934X_RESET_REG_PCIE_WMAC_INT_STATUS);
+
+	if (status & AR934X_PCIE_WMAC_INT_PCIE_ALL)
+		generic_handle_irq(AR934X_IP2_IRQ_PCIE);
+
+	else if (status & AR934X_PCIE_WMAC_INT_WMAC_ALL)
+		generic_handle_irq(AR934X_IP2_IRQ_WMAC);
+
+	else
+		spurious_interrupt();
+
+	enable_irq(irq);
+}
+
+static void ar934x_ip2_irq_init(void)
+{
+	int i;
+
+	for (i = AR934X_IP2_IRQ_BASE;
+	     i < AR934X_IP2_IRQ_BASE + AR934X_IP2_IRQ_COUNT; i++)
+		irq_set_chip_and_handler(i, &dummy_irq_chip,
+					 handle_level_irq);
+
+	irq_set_chained_handler(AR71XX_CPU_IRQ_IP2, ar934x_ip2_irq_dispatch);
+}
+
+
 /*
  * The IP2/IP3 lines are tied to a PCI/WMAC/USB device. Drivers for
  * these devices typically allocate coherent DMA memory, however the
@@ -372,6 +405,11 @@ void __init arch_init_irq(void)
 
 	ar71xx_misc_irq_init();
 
+	if (ar71xx_soc == AR71XX_SOC_AR9341 ||
+	    ar71xx_soc == AR71XX_SOC_AR9342 ||
+	    ar71xx_soc == AR71XX_SOC_AR9344)
+		ar934x_ip2_irq_init();
+
 	cp0_perfcount_irq = AR71XX_MISC_IRQ_PERFC;
 
 	ar71xx_gpio_irq_init();
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/pci.c b/target/linux/ar71xx/files/arch/mips/ar71xx/pci.c
index bd9217caa4..8850c0b6b0 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/pci.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/pci.c
@@ -81,9 +81,12 @@ int __init ar71xx_pci_init(unsigned nr_irqs, struct ar71xx_pci_irq *map)
 	case AR71XX_SOC_AR7240:
 	case AR71XX_SOC_AR7241:
 	case AR71XX_SOC_AR7242:
+		ret = ar724x_pcibios_init(AR71XX_CPU_IRQ_IP2);
+		break;
+
 	case AR71XX_SOC_AR9342:
 	case AR71XX_SOC_AR9344:
-		ret = ar724x_pcibios_init(AR71XX_CPU_IRQ_IP2);
+		ret = ar724x_pcibios_init(AR934X_IP2_IRQ_PCIE);
 		break;
 
 	default:
diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
index 46346648fa..fe2d9a32bc 100644
--- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
+++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
@@ -89,7 +89,9 @@
 #define AR71XX_GPIO_IRQ_BASE	40
 #define AR71XX_GPIO_IRQ_COUNT	32
 #define AR71XX_PCI_IRQ_BASE	72
-#define AR71XX_PCI_IRQ_COUNT	8
+#define AR71XX_PCI_IRQ_COUNT	6
+#define AR934X_IP2_IRQ_BASE	78
+#define AR934X_IP2_IRQ_COUNT	2
 
 #define AR71XX_CPU_IRQ_IP2	(AR71XX_CPU_IRQ_BASE + 2)
 #define AR71XX_CPU_IRQ_USB	(AR71XX_CPU_IRQ_BASE + 3)
@@ -119,6 +121,9 @@
 #define AR71XX_PCI_IRQ_DEV2	(AR71XX_PCI_IRQ_BASE + 2)
 #define AR71XX_PCI_IRQ_CORE	(AR71XX_PCI_IRQ_BASE + 4)
 
+#define AR934X_IP2_IRQ_WMAC	(AR934X_IP2_IRQ_BASE + 0)
+#define AR934X_IP2_IRQ_PCIE	(AR934X_IP2_IRQ_BASE + 1)
+
 extern u32 ar71xx_ahb_freq;
 extern u32 ar71xx_cpu_freq;
 extern u32 ar71xx_ddr_freq;