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ar71xx: use separate handlers for IP2 interrupts

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SVN-Revision: 27307
This commit is contained in:
Gabor Juhos 2011-06-29 08:57:28 +00:00
parent 9d6af600e1
commit 59bff8bf18
1 changed files with 48 additions and 20 deletions
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66
target/linux/ar71xx/files/arch/mips/ar71xx/irq.c
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@ -23,8 +23,6 @@
#include <asm/mach-ar71xx/ar71xx.h>
static int ip2_flush_reg;
static void ar71xx_gpio_irq_dispatch(void)
{
void __iomem *base = ar71xx_gpio_base;
@ -249,6 +247,46 @@ static void __init ar71xx_misc_irq_init(void)
setup_irq(AR71XX_CPU_IRQ_MISC, &ar71xx_misc_irqaction);
}
/*
* The IP2 line is tied to a PCI/WMAC device. Drivers for these
* devices typically allocate coherent DMA memory for the descriptor
* ring, however the DMA controller may still have some unsynchronized
* data in the FIFO.
* Issue a flush in the handlers to ensure that the driver sees
* the update.
*/
static void ar71xx_ip2_handler(void)
{
ar71xx_ddr_flush(AR71XX_DDR_REG_FLUSH_PCI);
do_IRQ(AR71XX_CPU_IRQ_IP2);
}
static void ar724x_ip2_handler(void)
{
ar71xx_ddr_flush(AR724X_DDR_REG_FLUSH_PCIE);
do_IRQ(AR71XX_CPU_IRQ_IP2);
}
static void ar913x_ip2_handler(void)
{
ar71xx_ddr_flush(AR91XX_DDR_REG_FLUSH_WMAC);
do_IRQ(AR71XX_CPU_IRQ_IP2);
}
static void ar933x_ip2_handler(void)
{
ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_WMAC);
do_IRQ(AR71XX_CPU_IRQ_IP2);
}
static void ar934x_ip2_handler(void)
{
ar71xx_ddr_flush(AR934X_DDR_REG_FLUSH_PCIE);
do_IRQ(AR71XX_CPU_IRQ_IP2);
}
static void (*ip2_handler)(void);
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
@ -258,17 +296,8 @@ asmlinkage void plat_irq_dispatch(void)
if (pending & STATUSF_IP7)
do_IRQ(AR71XX_CPU_IRQ_TIMER);
else if (pending & STATUSF_IP2) {
/*
* This IRQ is meant for a PCI device. Drivers for PCI devices
* typically allocate coherent DMA memory for the descriptor
* ring, however the DMA controller may still have some
* unsynchronized data in the FIFO.
* Issue a flush here to ensure that the driver sees the update.
*/
ar71xx_ddr_flush(ip2_flush_reg);
do_IRQ(AR71XX_CPU_IRQ_IP2);
}
else if (pending & STATUSF_IP2)
ip2_handler();
else if (pending & STATUSF_IP4)
do_IRQ(AR71XX_CPU_IRQ_GE0);
@ -282,7 +311,6 @@ asmlinkage void plat_irq_dispatch(void)
else if (pending & STATUSF_IP6)
ar71xx_misc_irq_dispatch();
else
spurious_interrupt();
}
@ -292,29 +320,29 @@ void __init arch_init_irq(void)
case AR71XX_SOC_AR7130:
case AR71XX_SOC_AR7141:
case AR71XX_SOC_AR7161:
ip2_flush_reg = AR71XX_DDR_REG_FLUSH_PCI;
ip2_handler = ar71xx_ip2_handler;
break;
case AR71XX_SOC_AR7240:
case AR71XX_SOC_AR7241:
case AR71XX_SOC_AR7242:
ip2_flush_reg = AR724X_DDR_REG_FLUSH_PCIE;
ip2_handler = ar724x_ip2_handler;
break;
case AR71XX_SOC_AR9130:
case AR71XX_SOC_AR9132:
ip2_flush_reg = AR91XX_DDR_REG_FLUSH_WMAC;
ip2_handler = ar913x_ip2_handler;
break;
case AR71XX_SOC_AR9330:
case AR71XX_SOC_AR9331:
ip2_flush_reg = AR933X_DDR_REG_FLUSH_WMAC;
ip2_handler = ar933x_ip2_handler;
break;
case AR71XX_SOC_AR9341:
case AR71XX_SOC_AR9342:
case AR71XX_SOC_AR9344:
ip2_flush_reg = AR934X_DDR_REG_FLUSH_PCIE;
ip2_handler = ar934x_ip2_handler;
break;
default: