diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-irq.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-irq.c | 163 |
1 files changed, 22 insertions, 141 deletions
diff --git a/drivers/media/video/cx18/cx18-irq.c b/drivers/media/video/cx18/cx18-irq.c index 5fbfbd0f1493..af2f504eda2b 100644 --- a/drivers/media/video/cx18/cx18-irq.c +++ b/drivers/media/video/cx18/cx18-irq.c @@ -2,6 +2,7 @@ * cx18 interrupt handling * * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> + * Copyright (C) 2008 Andy Walls <awalls@radix.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -21,132 +22,9 @@ #include "cx18-driver.h" #include "cx18-io.h" -#include "cx18-firmware.h" -#include "cx18-fileops.h" -#include "cx18-queue.h" #include "cx18-irq.h" -#include "cx18-ioctl.h" #include "cx18-mailbox.h" -#include "cx18-vbi.h" #include "cx18-scb.h" -#include "cx18-dvb.h" - -void cx18_work_handler(struct work_struct *work) -{ - struct cx18 *cx = container_of(work, struct cx18, work); - 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) -{ - u32 handle = mb->args[0]; - struct cx18_stream *s = NULL; - struct cx18_buffer *buf; - u32 off; - int i; - int id; - - for (i = 0; i < CX18_MAX_STREAMS; i++) { - s = &cx->streams[i]; - if ((handle == s->handle) && (s->dvb.enabled)) - break; - if (s->v4l2dev && handle == s->handle) - break; - } - if (i == CX18_MAX_STREAMS) { - CX18_WARN("Got DMA done notification for unknown/inactive" - " handle %d\n", handle); - mb->error = CXERR_NOT_OPEN; - mb->cmd = 0; - cx18_mb_ack(cx, mb); - return; - } - - off = mb->args[1]; - if (mb->args[2] != 1) - CX18_WARN("Ack struct = %d for %s\n", - mb->args[2], s->name); - id = cx18_read_enc(cx, off); - buf = cx18_queue_get_buf_irq(s, id, cx18_read_enc(cx, off + 4)); - CX18_DEBUG_HI_DMA("DMA DONE for %s (buffer %d)\n", s->name, id); - if (buf) { - cx18_buf_sync_for_cpu(s, buf); - if (s->type == CX18_ENC_STREAM_TYPE_TS && s->dvb.enabled) { - CX18_DEBUG_HI_DMA("TS recv bytesused = %d\n", - buf->bytesused); - - 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 { - CX18_WARN("Could not find buf %d for stream %s\n", - cx18_read_enc(cx, off), s->name); - } - mb->error = 0; - mb->cmd = 0; - cx18_mb_ack(cx, mb); - wake_up(&cx->dma_waitq); - if (s->id != -1) - wake_up(&s->waitq); -} - -static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb) -{ - char str[256] = { 0 }; - char *p; - - if (mb->args[1]) { - cx18_setup_page(cx, mb->args[1]); - cx18_memcpy_fromio(cx, str, cx->enc_mem + mb->args[1], 252); - str[252] = 0; - } - cx18_mb_ack(cx, mb); - 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) - CX18_INFO("FW version: %s\n", p - 1); -} - -static void epu_cmd(struct cx18 *cx, u32 sw1) -{ - struct cx18_mailbox mb; - - if (sw1 & IRQ_CPU_TO_EPU) { - cx18_memcpy_fromio(cx, &mb, &cx->scb->cpu2epu_mb, sizeof(mb)); - mb.error = 0; - - switch (mb.cmd) { - case CX18_EPU_DMA_DONE: - epu_dma_done(cx, &mb); - break; - case CX18_EPU_DEBUG: - epu_debug(cx, &mb); - break; - default: - CX18_WARN("Unknown CPU_TO_EPU mailbox command %#08x\n", - mb.cmd); - break; - } - } - - 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) { @@ -154,23 +32,24 @@ 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); +} + +static void epu_cmd(struct cx18 *cx, u32 sw1) +{ + if (sw1 & IRQ_CPU_TO_EPU) + cx18_api_epu_cmd_irq(cx, CPU); + if (sw1 & IRQ_APU_TO_EPU) + cx18_api_epu_cmd_irq(cx, APU); } irqreturn_t cx18_irq_handler(int irq, void *dev_id) { struct cx18 *cx = (struct cx18 *)dev_id; - u32 sw1, sw1_mask; - u32 sw2, sw2_mask; - u32 hw2, hw2_mask; + u32 sw1, sw2, hw2; - 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); - 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; + sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & cx->sw1_irq_mask; + sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & cx->sw2_irq_mask; + hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & cx->hw2_irq_mask; if (sw1) cx18_write_reg_expect(cx, sw1, SW1_INT_STATUS, ~sw1, sw1); @@ -180,7 +59,15 @@ 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); + + /* + * SW1 responses have to happen first. The sending XPU times out the + * incoming mailboxes on us rather rapidly. + */ + if (sw1) + epu_cmd(cx, sw1); /* To do: interrupt-based I2C handling if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) { @@ -190,11 +77,5 @@ irqreturn_t cx18_irq_handler(int irq, void *dev_id) if (sw2) xpu_ack(cx, sw2); - 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; } |