From e983ee4b8803e5659b8f3e418169e5d8c019d230 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Fri, 31 Oct 2008 19:49:12 -0400 Subject: cx18: Fix write retries for registers that always change - part 2. From: Andy Walls cx18: Fix write retries for registers that always change - part 2. Some registers, especially interrupt related ones, will never read back the value just written. Modified interrupt register readback checks to make sure the intended effect was achieved. Priority: high Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-irq.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-irq.c') diff --git a/linux/drivers/media/video/cx18/cx18-irq.c b/linux/drivers/media/video/cx18/cx18-irq.c index 038f70323..ba99ed0ed 100644 --- a/linux/drivers/media/video/cx18/cx18-irq.c +++ b/linux/drivers/media/video/cx18/cx18-irq.c @@ -146,16 +146,19 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) spin_lock(&cx->dma_reg_lock); - hw2_mask = cx18_read_reg(cx, HW2_INT_MASK5_PCI); - hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & hw2_mask; - sw2_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) | IRQ_EPU_TO_HPU_ACK; - sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & sw2_mask; sw1_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI) | IRQ_EPU_TO_HPU; sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & sw1_mask; + sw2_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) | IRQ_EPU_TO_HPU_ACK; + sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & sw2_mask; + hw2_mask = cx18_read_reg(cx, HW2_INT_MASK5_PCI); + hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & hw2_mask; - cx18_write_reg_noretry(cx, sw2&sw2_mask, SW2_INT_STATUS); - cx18_write_reg_noretry(cx, sw1&sw1_mask, SW1_INT_STATUS); - cx18_write_reg_noretry(cx, hw2&hw2_mask, HW2_INT_CLR_STATUS); + if (sw1) + cx18_write_reg_expect(cx, sw1, SW1_INT_STATUS, ~sw1, sw1); + if (sw2) + cx18_write_reg_expect(cx, sw2, SW2_INT_STATUS, ~sw2, sw2); + if (hw2) + cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2); if (sw1 || sw2 || hw2) CX18_DEBUG_HI_IRQ("SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2); @@ -182,5 +185,5 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) hpu_cmd(cx, sw1); spin_unlock(&cx->dma_reg_lock); - return (hw2 | sw1 | sw2) ? IRQ_HANDLED : IRQ_NONE; + return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; } -- cgit v1.2.3 From 817788e2c69eb1c7538e780de3acb5a95440b6c2 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Tue, 4 Nov 2008 20:02:23 -0500 Subject: cx18: Use correct Mailbox IRQ Ack values and misc IRQ handling cleanup From: Andy Walls cx18: Use correct Mailbox IRQ Ack values and misc IRQ handling cleanup. The SCB field definitions for Ack IRQ's for mailboxes were inconsistent with the bitmasks being loaded into those SCB fields and the SW2 Ack IRQ handling logic. Renamed fields in SCB to make things consistent and did misc IRQ handling cleanups: removing legacy ivtv dma_reg_lock, HPU IRQ flags, etc. Priority: high Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-irq.c | 54 +++++++++++++++++-------------- 1 file changed, 29 insertions(+), 25 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-irq.c') diff --git a/linux/drivers/media/video/cx18/cx18-irq.c b/linux/drivers/media/video/cx18/cx18-irq.c index ba99ed0ed..4c33d2a7f 100644 --- a/linux/drivers/media/video/cx18/cx18-irq.c +++ b/linux/drivers/media/video/cx18/cx18-irq.c @@ -30,8 +30,6 @@ #include "cx18-vbi.h" #include "cx18-scb.h" -#define DMA_MAGIC_COOKIE 0x000001fe - static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) { u32 handle = mb->args[0]; @@ -109,7 +107,7 @@ static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb) CX18_INFO("FW version: %s\n", p - 1); } -static void hpu_cmd(struct cx18 *cx, u32 sw1) +static void epu_cmd(struct cx18 *cx, u32 sw1) { struct cx18_mailbox mb; @@ -125,12 +123,31 @@ static void hpu_cmd(struct cx18 *cx, u32 sw1) epu_debug(cx, &mb); break; default: - CX18_WARN("Unexpected mailbox command %08x\n", mb.cmd); + CX18_WARN("Unknown CPU_TO_EPU mailbox command %#08x\n", + mb.cmd); break; } } - if (sw1 & (IRQ_APU_TO_EPU | IRQ_HPU_TO_EPU)) - CX18_WARN("Unexpected interrupt %08x\n", sw1); + + if (sw1 & IRQ_APU_TO_EPU) { + cx18_memcpy_fromio(cx, &mb, &cx->scb->apu2epu_mb, sizeof(mb)); + CX18_WARN("Unknown APU_TO_EPU mailbox command %#08x\n", mb.cmd); + } + + if (sw1 & IRQ_HPU_TO_EPU) { + cx18_memcpy_fromio(cx, &mb, &cx->scb->hpu2epu_mb, sizeof(mb)); + CX18_WARN("Unknown HPU_TO_EPU mailbox command %#08x\n", mb.cmd); + } +} + +static void xpu_ack(struct cx18 *cx, u32 sw2) +{ + if (sw2 & IRQ_CPU_TO_EPU_ACK) + wake_up(&cx->mb_cpu_waitq); + if (sw2 & IRQ_APU_TO_EPU_ACK) + wake_up(&cx->mb_apu_waitq); + if (sw2 & IRQ_HPU_TO_EPU_ACK) + wake_up(&cx->mb_hpu_waitq); } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) @@ -144,11 +161,9 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) u32 sw2, sw2_mask; u32 hw2, hw2_mask; - spin_lock(&cx->dma_reg_lock); - - sw1_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI) | IRQ_EPU_TO_HPU; + sw1_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI); sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & sw1_mask; - sw2_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) | IRQ_EPU_TO_HPU_ACK; + sw2_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI); sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & sw2_mask; hw2_mask = cx18_read_reg(cx, HW2_INT_MASK5_PCI); hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & hw2_mask; @@ -164,26 +179,15 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) CX18_DEBUG_HI_IRQ("SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2); /* To do: interrupt-based I2C handling - if (hw2 & 0x00c00000) { + if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) { } */ - if (sw2) { - if (sw2 & (cx18_readl(cx, &cx->scb->cpu2hpu_irq_ack) | - cx18_readl(cx, &cx->scb->cpu2epu_irq_ack))) - wake_up(&cx->mb_cpu_waitq); - if (sw2 & (cx18_readl(cx, &cx->scb->apu2hpu_irq_ack) | - cx18_readl(cx, &cx->scb->apu2epu_irq_ack))) - wake_up(&cx->mb_apu_waitq); - if (sw2 & cx18_readl(cx, &cx->scb->epu2hpu_irq_ack)) - wake_up(&cx->mb_epu_waitq); - if (sw2 & cx18_readl(cx, &cx->scb->hpu2epu_irq_ack)) - wake_up(&cx->mb_hpu_waitq); - } + if (sw2) + xpu_ack(cx, sw2); if (sw1) - hpu_cmd(cx, sw1); - spin_unlock(&cx->dma_reg_lock); + epu_cmd(cx, sw1); return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; } -- cgit v1.2.3 From 94703235501e112e7496efe5bce32671e121d98f Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Tue, 4 Nov 2008 22:49:14 -0500 Subject: cx18: Move DVB buffer transfer handling from irq handler to work_queue From: Andy Walls cx18: Move DVB buffer transfer handling from irq handler to work_queue thread. In order to properly lock the epu2cpu mailbox for driver to CX23418 commands, the DVB/TS buffer handling needs to be moved from the IRQ handler and IRQ context to a work queue. This work_queue implmentation is strikingly similar to the ivtv implementation - for better or worse. Priority: high Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-irq.c | 35 +++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 9 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-irq.c') diff --git a/linux/drivers/media/video/cx18/cx18-irq.c b/linux/drivers/media/video/cx18/cx18-irq.c index 4c33d2a7f..aff5a3abd 100644 --- a/linux/drivers/media/video/cx18/cx18-irq.c +++ b/linux/drivers/media/video/cx18/cx18-irq.c @@ -29,6 +29,26 @@ #include "cx18-mailbox.h" #include "cx18-vbi.h" #include "cx18-scb.h" +#include "cx18-dvb.h" + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20) +void cx18_work_handler(struct work_struct *work) +{ + struct cx18 *cx = container_of(work, struct cx18, work); +#else +void cx18_work_handler(void *arg) +{ + struct cx18 *cx = arg; +#endif + if (test_and_clear_bit(CX18_F_I_WORK_INITED, &cx->i_flags)) { + struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; + /* This thread must use the FIFO scheduler as it + * is realtime sensitive. */ + sched_setscheduler(current, SCHED_FIFO, ¶m); + } + if (test_and_clear_bit(CX18_F_I_WORK_HANDLER_DVB, &cx->i_flags)) + cx18_dvb_work_handler(cx); +} static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) { @@ -65,17 +85,11 @@ static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) if (buf) { cx18_buf_sync_for_cpu(s, buf); if (s->type == CX18_ENC_STREAM_TYPE_TS && s->dvb.enabled) { - /* process the buffer here */ - CX18_DEBUG_HI_DMA("TS recv and sent bytesused=%d\n", + CX18_DEBUG_HI_DMA("TS recv bytesused = %d\n", buf->bytesused); - dvb_dmx_swfilter(&s->dvb.demux, buf->buf, - buf->bytesused); - - cx18_buf_sync_for_device(s, buf); - cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle, - (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, - 1, buf->id, s->buf_size); + set_bit(CX18_F_I_WORK_HANDLER_DVB, &cx->i_flags); + set_bit(CX18_F_I_HAVE_WORK, &cx->i_flags); } else set_bit(CX18_F_B_NEED_BUF_SWAP, &buf->b_flags); } else { @@ -189,5 +203,8 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) if (sw1) epu_cmd(cx, sw1); + if (test_and_clear_bit(CX18_F_I_HAVE_WORK, &cx->i_flags)) + queue_work(cx->work_queue, &cx->work); + return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; } -- cgit v1.2.3 From 5c9a58b88f61db125e53c96ba49bada98fe466f0 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Wed, 5 Nov 2008 19:19:15 -0500 Subject: cx18: Use default kernel work queue; fix streaming flag for work handler From: Andy Walls cx18: Use default kernel work queue; fix streaming flag for work handler. Eliminate cx18 specific work queue and use the kernel default work queue. Fixed the F_STREAMING_FLAG for the TS stream so cx18_dvb_work_handler() can know when it is not safe to send MDLs to the firmware. Priority: high Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-irq.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-irq.c') diff --git a/linux/drivers/media/video/cx18/cx18-irq.c b/linux/drivers/media/video/cx18/cx18-irq.c index aff5a3abd..0c1ee93b5 100644 --- a/linux/drivers/media/video/cx18/cx18-irq.c +++ b/linux/drivers/media/video/cx18/cx18-irq.c @@ -40,12 +40,6 @@ void cx18_work_handler(void *arg) { struct cx18 *cx = arg; #endif - if (test_and_clear_bit(CX18_F_I_WORK_INITED, &cx->i_flags)) { - struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; - /* This thread must use the FIFO scheduler as it - * is realtime sensitive. */ - sched_setscheduler(current, SCHED_FIFO, ¶m); - } if (test_and_clear_bit(CX18_F_I_WORK_HANDLER_DVB, &cx->i_flags)) cx18_dvb_work_handler(cx); } @@ -204,7 +198,7 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) epu_cmd(cx, sw1); if (test_and_clear_bit(CX18_F_I_HAVE_WORK, &cx->i_flags)) - queue_work(cx->work_queue, &cx->work); + schedule_work(&cx->work); return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; } -- cgit v1.2.3 From f632c32a0a44337780146df40146d6330b6aa9d8 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Wed, 5 Nov 2008 23:15:41 -0500 Subject: cx18: Add outgoing mailbox mutexes and check for ack via waitq vs poll From: Andy Walls Add mutexes to ensure exclusive access for outgoing driver to CX23418 mailboxes. Also wait on a waitq for mailbox acknowledgement from the CX23418 instead of polling. Priority: high Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-irq.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-irq.c') diff --git a/linux/drivers/media/video/cx18/cx18-irq.c b/linux/drivers/media/video/cx18/cx18-irq.c index 0c1ee93b5..b222183b9 100644 --- a/linux/drivers/media/video/cx18/cx18-irq.c +++ b/linux/drivers/media/video/cx18/cx18-irq.c @@ -44,7 +44,7 @@ void cx18_work_handler(void *arg) cx18_dvb_work_handler(cx); } -static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) +static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb, int rpu) { u32 handle = mb->args[0]; struct cx18_stream *s = NULL; @@ -65,7 +65,7 @@ static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) " handle %d\n", handle); mb->error = CXERR_NOT_OPEN; mb->cmd = 0; - cx18_mb_ack(cx, mb); + cx18_mb_ack(cx, mb, rpu); return; } @@ -92,13 +92,13 @@ static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) } mb->error = 0; mb->cmd = 0; - cx18_mb_ack(cx, mb); + cx18_mb_ack(cx, mb, rpu); wake_up(&cx->dma_waitq); if (s->id != -1) wake_up(&s->waitq); } -static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb) +static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb, int rpu) { char str[256] = { 0 }; char *p; @@ -108,7 +108,7 @@ static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb) cx18_memcpy_fromio(cx, str, cx->enc_mem + mb->args[1], 252); str[252] = 0; } - cx18_mb_ack(cx, mb); + cx18_mb_ack(cx, mb, rpu); CX18_DEBUG_INFO("%x %s\n", mb->args[0], str); p = strchr(str, '.'); if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags) && p && p > str) @@ -125,10 +125,10 @@ static void epu_cmd(struct cx18 *cx, u32 sw1) switch (mb.cmd) { case CX18_EPU_DMA_DONE: - epu_dma_done(cx, &mb); + epu_dma_done(cx, &mb, CPU); break; case CX18_EPU_DEBUG: - epu_debug(cx, &mb); + epu_debug(cx, &mb, CPU); break; default: CX18_WARN("Unknown CPU_TO_EPU mailbox command %#08x\n", @@ -141,11 +141,6 @@ static void epu_cmd(struct cx18 *cx, u32 sw1) cx18_memcpy_fromio(cx, &mb, &cx->scb->apu2epu_mb, sizeof(mb)); CX18_WARN("Unknown APU_TO_EPU mailbox command %#08x\n", mb.cmd); } - - if (sw1 & IRQ_HPU_TO_EPU) { - cx18_memcpy_fromio(cx, &mb, &cx->scb->hpu2epu_mb, sizeof(mb)); - CX18_WARN("Unknown HPU_TO_EPU mailbox command %#08x\n", mb.cmd); - } } static void xpu_ack(struct cx18 *cx, u32 sw2) @@ -154,8 +149,6 @@ static void xpu_ack(struct cx18 *cx, u32 sw2) wake_up(&cx->mb_cpu_waitq); if (sw2 & IRQ_APU_TO_EPU_ACK) wake_up(&cx->mb_apu_waitq); - if (sw2 & IRQ_HPU_TO_EPU_ACK) - wake_up(&cx->mb_hpu_waitq); } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) -- cgit v1.2.3 From d2d260c5ae3e899c0f3d1482a4e58057c4031dbd Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Fri, 7 Nov 2008 21:57:46 -0500 Subject: cx18: Improve handling of outgoing mailboxes detected to be busy From: Andy Walls cx18: Improve handling of outgoing mailboxes detected to be busy. When encountering a busy mailbox, sleep instead of polling, and wait for interrupt or timeout. If the mailbox is still busy, force it free. When sending commands, make sure we never create a situation where we mark the mailbox busy upon sending, and ensure we always have a method to cleanly recover from a busy mailbox. Priority: high Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-irq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'linux/drivers/media/video/cx18/cx18-irq.c') diff --git a/linux/drivers/media/video/cx18/cx18-irq.c b/linux/drivers/media/video/cx18/cx18-irq.c index b222183b9..3e23fc350 100644 --- a/linux/drivers/media/video/cx18/cx18-irq.c +++ b/linux/drivers/media/video/cx18/cx18-irq.c @@ -177,7 +177,8 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2); if (sw1 || sw2 || hw2) - CX18_DEBUG_HI_IRQ("SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2); + CX18_DEBUG_HI_IRQ("received interrupts " + "SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2); /* To do: interrupt-based I2C handling if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) { -- cgit v1.2.3