diff options
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/ar71xx/irq.c | 68 |
1 files changed, 48 insertions, 20 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c b/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c index 5d1e1c60e..9758f63f3 100644 --- a/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c +++ b/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c @@ -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); @@ -282,8 +311,7 @@ asmlinkage void plat_irq_dispatch(void) else if (pending & STATUSF_IP6) ar71xx_misc_irq_dispatch(); - else - spurious_interrupt(); + spurious_interrupt(); } void __init arch_init_irq(void) @@ -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: |