diff options
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/ar71xx/irq.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c b/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c index eecdd9f714..4e1da167dd 100644 --- a/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c +++ b/target/linux/ar71xx/files/arch/mips/ar71xx/irq.c @@ -21,6 +21,8 @@ #include <asm/mach-ar71xx/ar71xx.h> +static int ip2_flush_reg; + static void ar71xx_gpio_irq_dispatch(void) { void __iomem *base = ar71xx_gpio_base; @@ -239,8 +241,17 @@ asmlinkage void plat_irq_dispatch(void) if (pending & STATUSF_IP7) do_IRQ(AR71XX_CPU_IRQ_TIMER); - else if (pending & STATUSF_IP2) + 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_IP4) do_IRQ(AR71XX_CPU_IRQ_GE0); @@ -260,6 +271,20 @@ asmlinkage void plat_irq_dispatch(void) void __init arch_init_irq(void) { + switch(ar71xx_soc) { + case AR71XX_SOC_AR7240: + case AR71XX_SOC_AR7241: + case AR71XX_SOC_AR7242: + ip2_flush_reg = AR724X_DDR_REG_FLUSH_PCIE; + break; + case AR71XX_SOC_AR9130: + case AR71XX_SOC_AR9132: + ip2_flush_reg = AR91XX_DDR_REG_FLUSH_WMAC; + break; + default: + ip2_flush_reg = AR71XX_DDR_REG_FLUSH_PCI; + break; + } mips_cpu_irq_init(); ar71xx_misc_irq_init(); |