diff options
Diffstat (limited to 'drivers/media/video/cx18')
| -rw-r--r-- | drivers/media/video/cx18/cx18-firmware.c | 11 | ||||
| -rw-r--r-- | drivers/media/video/cx18/cx18-io.c | 7 | ||||
| -rw-r--r-- | drivers/media/video/cx18/cx18-io.h | 1 | ||||
| -rw-r--r-- | drivers/media/video/cx18/cx18-irq.h | 1 |
4 files changed, 20 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-firmware.c b/drivers/media/video/cx18/cx18-firmware.c index ab02da72751..06f5563d6d5 100644 --- a/drivers/media/video/cx18/cx18-firmware.c +++ b/drivers/media/video/cx18/cx18-firmware.c @@ -380,6 +380,17 @@ int cx18_firmware_init(struct cx18 *cx) if (sz <= 0) return -EIO; } + + /* + * The CPU firmware apparently sets up to receive an interrupt for it's + * outgoing IRQ_CPU_TO_EPU_ACK to us (*boggle*). We get an interrupt + * when it sends us an ack, but by the time we process it, that flag in + * the SW2 status register has been cleared by the CPU firmware. + * We'll prevent that not so useful behavior by clearing the CPU's + * interrupt enables for Ack IRQ's we want to process. + */ + cx18_sw2_irq_disable_cpu(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK); + /* initialize GPIO */ cx18_write_reg_expect(cx, 0x14001400, 0xc78110, 0x00001400, 0x14001400); return 0; diff --git a/drivers/media/video/cx18/cx18-io.c b/drivers/media/video/cx18/cx18-io.c index 48a8adc83c2..3c6485fceea 100644 --- a/drivers/media/video/cx18/cx18-io.c +++ b/drivers/media/video/cx18/cx18-io.c @@ -262,6 +262,13 @@ void cx18_sw2_irq_disable(struct cx18 *cx, u32 val) cx18_write_reg(cx, r & ~val, SW2_INT_ENABLE_PCI); } +void cx18_sw2_irq_disable_cpu(struct cx18 *cx, u32 val) +{ + u32 r; + r = cx18_read_reg(cx, SW2_INT_ENABLE_CPU); + cx18_write_reg(cx, r & ~val, SW2_INT_ENABLE_CPU); +} + void cx18_setup_page(struct cx18 *cx, u32 addr) { u32 val; diff --git a/drivers/media/video/cx18/cx18-io.h b/drivers/media/video/cx18/cx18-io.h index cb695a59670..4486b73faf5 100644 --- a/drivers/media/video/cx18/cx18-io.h +++ b/drivers/media/video/cx18/cx18-io.h @@ -390,6 +390,7 @@ void cx18_sw1_irq_enable(struct cx18 *cx, u32 val); void cx18_sw1_irq_disable(struct cx18 *cx, u32 val); void cx18_sw2_irq_enable(struct cx18 *cx, u32 val); void cx18_sw2_irq_disable(struct cx18 *cx, u32 val); +void cx18_sw2_irq_disable_cpu(struct cx18 *cx, u32 val); void cx18_setup_page(struct cx18 *cx, u32 addr); #endif /* CX18_IO_H */ diff --git a/drivers/media/video/cx18/cx18-irq.h b/drivers/media/video/cx18/cx18-irq.h index 6173ca3bc9e..6f3ec896376 100644 --- a/drivers/media/video/cx18/cx18-irq.h +++ b/drivers/media/video/cx18/cx18-irq.h @@ -28,6 +28,7 @@ #define SW1_INT_ENABLE_PCI 0xc7311c #define SW2_INT_SET 0xc73140 #define SW2_INT_STATUS 0xc73144 +#define SW2_INT_ENABLE_CPU 0xc73158 #define SW2_INT_ENABLE_PCI 0xc7315c irqreturn_t cx18_irq_handler(int irq, void *dev_id); |