diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-irq.c')
-rw-r--r-- | drivers/media/video/cx18/cx18-irq.c | 169 |
1 files changed, 34 insertions, 135 deletions
diff --git a/drivers/media/video/cx18/cx18-irq.c b/drivers/media/video/cx18/cx18-irq.c index 360330f5463..af2f504eda2 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 @@ -21,162 +22,60 @@ #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" -#define DMA_MAGIC_COOKIE 0x000001fe - -static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb) +static void xpu_ack(struct cx18 *cx, u32 sw2) { - 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) { - /* process the buffer here */ - CX18_DEBUG_HI_DMA("TS recv and sent 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); - } 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); + 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); } -static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb) +static void epu_cmd(struct cx18 *cx, u32 sw1) { - 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 hpu_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("Unexpected 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_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; - - spin_lock(&cx->dma_reg_lock); + u32 sw1, sw2, hw2; - 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; + 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; - cx18_write_reg(cx, sw2&sw2_mask, SW2_INT_STATUS); - cx18_write_reg(cx, sw1&sw1_mask, SW1_INT_STATUS); - cx18_write_reg(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); + 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 & 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 (sw1) - hpu_cmd(cx, sw1); - spin_unlock(&cx->dma_reg_lock); + if (sw2) + xpu_ack(cx, sw2); - return (hw2 | sw1 | sw2) ? IRQ_HANDLED : IRQ_NONE; + return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; } |