diff options
Diffstat (limited to 'drivers/media/pci/ivtv/ivtv-irq.c')
| -rw-r--r-- | drivers/media/pci/ivtv/ivtv-irq.c | 1088 |
1 files changed, 1088 insertions, 0 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-irq.c b/drivers/media/pci/ivtv/ivtv-irq.c new file mode 100644 index 00000000000..19a7c9b990a --- /dev/null +++ b/drivers/media/pci/ivtv/ivtv-irq.c @@ -0,0 +1,1088 @@ +/* interrupt handling + Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> + Copyright (C) 2004 Chris Kennedy <c@groovy.org> + Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> + + 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 + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "ivtv-driver.h" +#include "ivtv-queue.h" +#include "ivtv-udma.h" +#include "ivtv-irq.h" +#include "ivtv-mailbox.h" +#include "ivtv-vbi.h" +#include "ivtv-yuv.h" +#include <media/v4l2-event.h> + +#define DMA_MAGIC_COOKIE 0x000001fe + +static void ivtv_dma_dec_start(struct ivtv_stream *s); + +static const int ivtv_stream_map[] = { + IVTV_ENC_STREAM_TYPE_MPG, + IVTV_ENC_STREAM_TYPE_YUV, + IVTV_ENC_STREAM_TYPE_PCM, + IVTV_ENC_STREAM_TYPE_VBI, +}; + +static void ivtv_pcm_work_handler(struct ivtv *itv) +{ + struct ivtv_stream *s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM]; + struct ivtv_buffer *buf; + + /* Pass the PCM data to ivtv-alsa */ + + while (1) { + /* + * Users should not be using both the ALSA and V4L2 PCM audio + * capture interfaces at the same time. If the user is doing + * this, there maybe a buffer in q_io to grab, use, and put + * back in rotation. + */ + buf = ivtv_dequeue(s, &s->q_io); + if (buf == NULL) + buf = ivtv_dequeue(s, &s->q_full); + if (buf == NULL) + break; + + if (buf->readpos < buf->bytesused) + itv->pcm_announce_callback(itv->alsa, + (u8 *)(buf->buf + buf->readpos), + (size_t)(buf->bytesused - buf->readpos)); + + ivtv_enqueue(s, buf, &s->q_free); + } +} + +static void ivtv_pio_work_handler(struct ivtv *itv) +{ + struct ivtv_stream *s = &itv->streams[itv->cur_pio_stream]; + struct ivtv_buffer *buf; + int i = 0; + + IVTV_DEBUG_HI_DMA("ivtv_pio_work_handler\n"); + if (itv->cur_pio_stream < 0 || itv->cur_pio_stream >= IVTV_MAX_STREAMS || + s->vdev == NULL || !ivtv_use_pio(s)) { + itv->cur_pio_stream = -1; + /* trigger PIO complete user interrupt */ + write_reg(IVTV_IRQ_ENC_PIO_COMPLETE, 0x44); + return; + } + IVTV_DEBUG_HI_DMA("Process PIO %s\n", s->name); + list_for_each_entry(buf, &s->q_dma.list, list) { + u32 size = s->sg_processing[i].size & 0x3ffff; + + /* Copy the data from the card to the buffer */ + if (s->type == IVTV_DEC_STREAM_TYPE_VBI) { + memcpy_fromio(buf->buf, itv->dec_mem + s->sg_processing[i].src - IVTV_DECODER_OFFSET, size); + } + else { + memcpy_fromio(buf->buf, itv->enc_mem + s->sg_processing[i].src, size); + } + i++; + if (i == s->sg_processing_size) + break; + } + write_reg(IVTV_IRQ_ENC_PIO_COMPLETE, 0x44); +} + +void ivtv_irq_work_handler(struct kthread_work *work) +{ + struct ivtv *itv = container_of(work, struct ivtv, irq_work); + + if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_PIO, &itv->i_flags)) + ivtv_pio_work_handler(itv); + + if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_VBI, &itv->i_flags)) + ivtv_vbi_work_handler(itv); + + if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_YUV, &itv->i_flags)) + ivtv_yuv_work_handler(itv); + + if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_PCM, &itv->i_flags)) + ivtv_pcm_work_handler(itv); +} + +/* Determine the required DMA size, setup enough buffers in the predma queue and + actually copy the data from the card to the buffers in case a PIO transfer is + required for this stream. + */ +static int stream_enc_dma_append(struct ivtv_stream *s, u32 data[CX2341X_MBOX_MAX_DATA]) +{ + struct ivtv *itv = s->itv; + struct ivtv_buffer *buf; + u32 bytes_needed = 0; + u32 offset, size; + u32 UVoffset = 0, UVsize = 0; + int skip_bufs = s->q_predma.buffers; + int idx = s->sg_pending_size; + int rc; + + /* sanity checks */ + if (s->vdev == NULL) { + IVTV_DEBUG_WARN("Stream %s not started\n", s->name); + return -1; + } + if (!test_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { + IVTV_DEBUG_WARN("Stream %s not open\n", s->name); + return -1; + } + + /* determine offset, size and PTS for the various streams */ + switch (s->type) { + case IVTV_ENC_STREAM_TYPE_MPG: + offset = data[1]; + size = data[2]; + s->pending_pts = 0; + break; + + case IVTV_ENC_STREAM_TYPE_YUV: + offset = data[1]; + size = data[2]; + UVoffset = data[3]; + UVsize = data[4]; + s->pending_pts = ((u64) data[5] << 32) | data[6]; + break; + + case IVTV_ENC_STREAM_TYPE_PCM: + offset = data[1] + 12; + size = data[2] - 12; + s->pending_pts = read_dec(offset - 8) | + ((u64)(read_dec(offset - 12)) << 32); + if (itv->has_cx23415) + offset += IVTV_DECODER_OFFSET; + break; + + case IVTV_ENC_STREAM_TYPE_VBI: + size = itv->vbi.enc_size * itv->vbi.fpi; + offset = read_enc(itv->vbi.enc_start - 4) + 12; + if (offset == 12) { + IVTV_DEBUG_INFO("VBI offset == 0\n"); + return -1; + } + s->pending_pts = read_enc(offset - 4) | ((u64)read_enc(offset - 8) << 32); + break; + + case IVTV_DEC_STREAM_TYPE_VBI: + size = read_dec(itv->vbi.dec_start + 4) + 8; + offset = read_dec(itv->vbi.dec_start) + itv->vbi.dec_start; + s->pending_pts = 0; + offset += IVTV_DECODER_OFFSET; + break; + default: + /* shouldn't happen */ + return -1; + } + + /* if this is the start of the DMA then fill in the magic cookie */ + if (s->sg_pending_size == 0 && ivtv_use_dma(s)) { + if (itv->has_cx23415 && (s->type == IVTV_ENC_STREAM_TYPE_PCM || + s->type == IVTV_DEC_STREAM_TYPE_VBI)) { + s->pending_backup = read_dec(offset - IVTV_DECODER_OFFSET); + write_dec_sync(cpu_to_le32(DMA_MAGIC_COOKIE), offset - IVTV_DECODER_OFFSET); + } + else { + s->pending_backup = read_enc(offset); + write_enc_sync(cpu_to_le32(DMA_MAGIC_COOKIE), offset); + } + s->pending_offset = offset; + } + + bytes_needed = size; + if (s->type == IVTV_ENC_STREAM_TYPE_YUV) { + /* The size for the Y samples needs to be rounded upwards to a + multiple of the buf_size. The UV samples then start in the + next buffer. */ + bytes_needed = s->buf_size * ((bytes_needed + s->buf_size - 1) / s->buf_size); + bytes_needed += UVsize; + } + + IVTV_DEBUG_HI_DMA("%s %s: 0x%08x bytes at 0x%08x\n", + ivtv_use_pio(s) ? "PIO" : "DMA", s->name, bytes_needed, offset); + + rc = ivtv_queue_move(s, &s->q_free, &s->q_full, &s->q_predma, bytes_needed); + if (rc < 0) { /* Insufficient buffers */ + IVTV_DEBUG_WARN("Cannot obtain %d bytes for %s data transfer\n", + bytes_needed, s->name); + return -1; + } + if (rc && !s->buffers_stolen && test_bit(IVTV_F_S_APPL_IO, &s->s_flags)) { + IVTV_WARN("All %s stream buffers are full. Dropping data.\n", s->name); + IVTV_WARN("Cause: the application is not reading fast enough.\n"); + } + s->buffers_stolen = rc; + + /* got the buffers, now fill in sg_pending */ + buf = list_entry(s->q_predma.list.next, struct ivtv_buffer, list); + memset(buf->buf, 0, 128); + list_for_each_entry(buf, &s->q_predma.list, list) { + if (skip_bufs-- > 0) + continue; + s->sg_pending[idx].dst = buf->dma_handle; + s->sg_pending[idx].src = offset; + s->sg_pending[idx].size = s->buf_size; + buf->bytesused = min(size, s->buf_size); + buf->dma_xfer_cnt = s->dma_xfer_cnt; + + s->q_predma.bytesused += buf->bytesused; + size -= buf->bytesused; + offset += s->buf_size; + + /* Sync SG buffers */ + ivtv_buf_sync_for_device(s, buf); + + if (size == 0) { /* YUV */ + /* process the UV section */ + offset = UVoffset; + size = UVsize; + } + idx++; + } + s->sg_pending_size = idx; + return 0; +} + +static void dma_post(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + struct ivtv_buffer *buf = NULL; + struct list_head *p; + u32 offset; + __le32 *u32buf; + int x = 0; + + IVTV_DEBUG_HI_DMA("%s %s completed (%x)\n", ivtv_use_pio(s) ? "PIO" : "DMA", + s->name, s->dma_offset); + list_for_each(p, &s->q_dma.list) { + buf = list_entry(p, struct ivtv_buffer, list); + u32buf = (__le32 *)buf->buf; + + /* Sync Buffer */ + ivtv_buf_sync_for_cpu(s, buf); + + if (x == 0 && ivtv_use_dma(s)) { + offset = s->dma_last_offset; + if (u32buf[offset / 4] != DMA_MAGIC_COOKIE) + { + for (offset = 0; offset < 64; offset++) { + if (u32buf[offset] == DMA_MAGIC_COOKIE) { + break; + } + } + offset *= 4; + if (offset == 256) { + IVTV_DEBUG_WARN("%s: Couldn't find start of buffer within the first 256 bytes\n", s->name); + offset = s->dma_last_offset; + } + if (s->dma_last_offset != offset) + IVTV_DEBUG_WARN("%s: offset %d -> %d\n", s->name, s->dma_last_offset, offset); + s->dma_last_offset = offset; + } + if (itv->has_cx23415 && (s->type == IVTV_ENC_STREAM_TYPE_PCM || + s->type == IVTV_DEC_STREAM_TYPE_VBI)) { + write_dec_sync(0, s->dma_offset - IVTV_DECODER_OFFSET); + } + else { + write_enc_sync(0, s->dma_offset); + } + if (offset) { + buf->bytesused -= offset; + memcpy(buf->buf, buf->buf + offset, buf->bytesused + offset); + } + *u32buf = cpu_to_le32(s->dma_backup); + } + x++; + /* flag byteswap ABCD -> DCBA for MPG & VBI data outside irq */ + if (s->type == IVTV_ENC_STREAM_TYPE_MPG || + s->type == IVTV_ENC_STREAM_TYPE_VBI) + buf->b_flags |= IVTV_F_B_NEED_BUF_SWAP; + } + if (buf) + buf->bytesused += s->dma_last_offset; + if (buf && s->type == IVTV_DEC_STREAM_TYPE_VBI) { + list_for_each_entry(buf, &s->q_dma.list, list) { + /* Parse and Groom VBI Data */ + s->q_dma.bytesused -= buf->bytesused; + ivtv_process_vbi_data(itv, buf, 0, s->type); + s->q_dma.bytesused += buf->bytesused; + } + if (s->fh == NULL) { + ivtv_queue_move(s, &s->q_dma, NULL, &s->q_free, 0); + return; + } + } + + ivtv_queue_move(s, &s->q_dma, NULL, &s->q_full, s->q_dma.bytesused); + + if (s->type == IVTV_ENC_STREAM_TYPE_PCM && + itv->pcm_announce_callback != NULL) { + /* + * Set up the work handler to pass the data to ivtv-alsa. + * + * We just use q_full and let the work handler race with users + * making ivtv-fileops.c calls on the PCM device node. + * + * Users should not be using both the ALSA and V4L2 PCM audio + * capture interfaces at the same time. If the user does this, + * fragments of data will just go out each interface as they + * race for PCM data. + */ + set_bit(IVTV_F_I_WORK_HANDLER_PCM, &itv->i_flags); + set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags); + } + + if (s->fh) + wake_up(&s->waitq); +} + +void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock) +{ + struct ivtv *itv = s->itv; + struct yuv_playback_info *yi = &itv->yuv_info; + u8 frame = yi->draw_frame; + struct yuv_frame_info *f = &yi->new_frame_info[frame]; + struct ivtv_buffer *buf; + u32 y_size = 720 * ((f->src_h + 31) & ~31); + u32 uv_offset = offset + IVTV_YUV_BUFFER_UV_OFFSET; + int y_done = 0; + int bytes_written = 0; + unsigned long flags = 0; + int idx = 0; + + IVTV_DEBUG_HI_DMA("DEC PREPARE DMA %s: %08x %08x\n", s->name, s->q_predma.bytesused, offset); + + /* Insert buffer block for YUV if needed */ + if (s->type == IVTV_DEC_STREAM_TYPE_YUV && f->offset_y) { + if (yi->blanking_dmaptr) { + s->sg_pending[idx].src = yi->blanking_dmaptr; + s->sg_pending[idx].dst = offset; + s->sg_pending[idx].size = 720 * 16; + } + offset += 720 * 16; + idx++; + } + + list_for_each_entry(buf, &s->q_predma.list, list) { + /* YUV UV Offset from Y Buffer */ + if (s->type == IVTV_DEC_STREAM_TYPE_YUV && !y_done && + (bytes_written + buf->bytesused) >= y_size) { + s->sg_pending[idx].src = buf->dma_handle; + s->sg_pending[idx].dst = offset; + s->sg_pending[idx].size = y_size - bytes_written; + offset = uv_offset; + if (s->sg_pending[idx].size != buf->bytesused) { + idx++; + s->sg_pending[idx].src = + buf->dma_handle + s->sg_pending[idx - 1].size; + s->sg_pending[idx].dst = offset; + s->sg_pending[idx].size = + buf->bytesused - s->sg_pending[idx - 1].size; + offset += s->sg_pending[idx].size; + } + y_done = 1; + } else { + s->sg_pending[idx].src = buf->dma_handle; + s->sg_pending[idx].dst = offset; + s->sg_pending[idx].size = buf->bytesused; + offset += buf->bytesused; + } + bytes_written += buf->bytesused; + + /* Sync SG buffers */ + ivtv_buf_sync_for_device(s, buf); + idx++; + } + s->sg_pending_size = idx; + + /* Sync Hardware SG List of buffers */ + ivtv_stream_sync_for_device(s); + if (lock) + spin_lock_irqsave(&itv->dma_reg_lock, flags); + if (!test_bit(IVTV_F_I_DMA, &itv->i_flags)) { + ivtv_dma_dec_start(s); + } + else { + set_bit(IVTV_F_S_DMA_PENDING, &s->s_flags); + } + if (lock) + spin_unlock_irqrestore(&itv->dma_reg_lock, flags); +} + +static void ivtv_dma_enc_start_xfer(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + + s->sg_dma->src = cpu_to_le32(s->sg_processing[s->sg_processed].src); + s->sg_dma->dst = cpu_to_le32(s->sg_processing[s->sg_processed].dst); + s->sg_dma->size = cpu_to_le32(s->sg_processing[s->sg_processed].size | 0x80000000); + s->sg_processed++; + /* Sync Hardware SG List of buffers */ + ivtv_stream_sync_for_device(s); + write_reg(s->sg_handle, IVTV_REG_ENCDMAADDR); + write_reg_sync(read_reg(IVTV_REG_DMAXFER) | 0x02, IVTV_REG_DMAXFER); + itv->dma_timer.expires = jiffies + msecs_to_jiffies(300); + add_timer(&itv->dma_timer); +} + +static void ivtv_dma_dec_start_xfer(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + + s->sg_dma->src = cpu_to_le32(s->sg_processing[s->sg_processed].src); + s->sg_dma->dst = cpu_to_le32(s->sg_processing[s->sg_processed].dst); + s->sg_dma->size = cpu_to_le32(s->sg_processing[s->sg_processed].size | 0x80000000); + s->sg_processed++; + /* Sync Hardware SG List of buffers */ + ivtv_stream_sync_for_device(s); + write_reg(s->sg_handle, IVTV_REG_DECDMAADDR); + write_reg_sync(read_reg(IVTV_REG_DMAXFER) | 0x01, IVTV_REG_DMAXFER); + itv->dma_timer.expires = jiffies + msecs_to_jiffies(300); + add_timer(&itv->dma_timer); +} + +/* start the encoder DMA */ +static void ivtv_dma_enc_start(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + int i; + + IVTV_DEBUG_HI_DMA("start %s for %s\n", ivtv_use_dma(s) ? "DMA" : "PIO", s->name); + + if (s->q_predma.bytesused) + ivtv_queue_move(s, &s->q_predma, NULL, &s->q_dma, s->q_predma.bytesused); + + if (ivtv_use_dma(s)) + s->sg_pending[s->sg_pending_size - 1].size += 256; + + /* If this is an MPEG stream, and VBI data is also pending, then append the + VBI DMA to the MPEG DMA and transfer both sets of data at once. + + VBI DMA is a second class citizen compared to MPEG and mixing them together + will confuse the firmware (the end of a VBI DMA is seen as the end of a + MPEG DMA, thus effectively dropping an MPEG frame). So instead we make + sure we only use the MPEG DMA to transfer the VBI DMA if both are in + use. This way no conflicts occur. */ + clear_bit(IVTV_F_S_DMA_HAS_VBI, &s->s_flags); + if (s->type == IVTV_ENC_STREAM_TYPE_MPG && s_vbi->sg_pending_size && + s->sg_pending_size + s_vbi->sg_pending_size <= s->buffers) { + ivtv_queue_move(s_vbi, &s_vbi->q_predma, NULL, &s_vbi->q_dma, s_vbi->q_predma.bytesused); + if (ivtv_use_dma(s_vbi)) + s_vbi->sg_pending[s_vbi->sg_pending_size - 1].size += 256; + for (i = 0; i < s_vbi->sg_pending_size; i++) { + s->sg_pending[s->sg_pending_size++] = s_vbi->sg_pending[i]; + } + s_vbi->dma_offset = s_vbi->pending_offset; + s_vbi->sg_pending_size = 0; + s_vbi->dma_xfer_cnt++; + set_bit(IVTV_F_S_DMA_HAS_VBI, &s->s_flags); + IVTV_DEBUG_HI_DMA("include DMA for %s\n", s_vbi->name); + } + + s->dma_xfer_cnt++; + memcpy(s->sg_processing, s->sg_pending, sizeof(struct ivtv_sg_host_element) * s->sg_pending_size); + s->sg_processing_size = s->sg_pending_size; + s->sg_pending_size = 0; + s->sg_processed = 0; + s->dma_offset = s->pending_offset; + s->dma_backup = s->pending_backup; + s->dma_pts = s->pending_pts; + + if (ivtv_use_pio(s)) { + set_bit(IVTV_F_I_WORK_HANDLER_PIO, &itv->i_flags); + set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags); + set_bit(IVTV_F_I_PIO, &itv->i_flags); + itv->cur_pio_stream = s->type; + } + else { + itv->dma_retries = 0; + ivtv_dma_enc_start_xfer(s); + set_bit(IVTV_F_I_DMA, &itv->i_flags); + itv->cur_dma_stream = s->type; + } +} + +static void ivtv_dma_dec_start(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + + if (s->q_predma.bytesused) + ivtv_queue_move(s, &s->q_predma, NULL, &s->q_dma, s->q_predma.bytesused); + s->dma_xfer_cnt++; + memcpy(s->sg_processing, s->sg_pending, sizeof(struct ivtv_sg_host_element) * s->sg_pending_size); + s->sg_processing_size = s->sg_pending_size; + s->sg_pending_size = 0; + s->sg_processed = 0; + + IVTV_DEBUG_HI_DMA("start DMA for %s\n", s->name); + itv->dma_retries = 0; + ivtv_dma_dec_start_xfer(s); + set_bit(IVTV_F_I_DMA, &itv->i_flags); + itv->cur_dma_stream = s->type; +} + +static void ivtv_irq_dma_read(struct ivtv *itv) +{ + struct ivtv_stream *s = NULL; + struct ivtv_buffer *buf; + int hw_stream_type = 0; + + IVTV_DEBUG_HI_IRQ("DEC DMA READ\n"); + + del_timer(&itv->dma_timer); + + if (!test_bit(IVTV_F_I_UDMA, &itv->i_flags) && itv->cur_dma_stream < 0) + return; + + if (!test_bit(IVTV_F_I_UDMA, &itv->i_flags)) { + s = &itv->streams[itv->cur_dma_stream]; + ivtv_stream_sync_for_cpu(s); + + if (read_reg(IVTV_REG_DMASTATUS) & 0x14) { + IVTV_DEBUG_WARN("DEC DMA ERROR %x (xfer %d of %d, retry %d)\n", + read_reg(IVTV_REG_DMASTATUS), + s->sg_processed, s->sg_processing_size, itv->dma_retries); + write_reg(read_reg(IVTV_REG_DMASTATUS) & 3, IVTV_REG_DMASTATUS); + if (itv->dma_retries == 3) { + /* Too many retries, give up on this frame */ + itv->dma_retries = 0; + s->sg_processed = s->sg_processing_size; + } + else { + /* Retry, starting with the first xfer segment. + Just retrying the current segment is not sufficient. */ + s->sg_processed = 0; + itv->dma_retries++; + } + } + if (s->sg_processed < s->sg_processing_size) { + /* DMA next buffer */ + ivtv_dma_dec_start_xfer(s); + return; + } + if (s->type == IVTV_DEC_STREAM_TYPE_YUV) + hw_stream_type = 2; + IVTV_DEBUG_HI_DMA("DEC DATA READ %s: %d\n", s->name, s->q_dma.bytesused); + + /* For some reason must kick the firmware, like PIO mode, + I think this tells the firmware we are done and the size + of the xfer so it can calculate what we need next. + I think we can do this part ourselves but would have to + fully calculate xfer info ourselves and not use interrupts + */ + ivtv_vapi(itv, CX2341X_DEC_SCHED_DMA_FROM_HOST, 3, 0, s->q_dma.bytesused, + hw_stream_type); + + /* Free last DMA call */ + while ((buf = ivtv_dequeue(s, &s->q_dma)) != NULL) { + ivtv_buf_sync_for_cpu(s, buf); + ivtv_enqueue(s, buf, &s->q_free); + } + wake_up(&s->waitq); + } + clear_bit(IVTV_F_I_UDMA, &itv->i_flags); + clear_bit(IVTV_F_I_DMA, &itv->i_flags); + itv->cur_dma_stream = -1; + wake_up(&itv->dma_waitq); +} + +static void ivtv_irq_enc_dma_complete(struct ivtv *itv) +{ + u32 data[CX2341X_MBOX_MAX_DATA]; + struct ivtv_stream *s; + + ivtv_api_get_data(&itv->enc_mbox, IVTV_MBOX_DMA_END, 2, data); + IVTV_DEBUG_HI_IRQ("ENC DMA COMPLETE %x %d (%d)\n", data[0], data[1], itv->cur_dma_stream); + + del_timer(&itv->dma_timer); + + if (itv->cur_dma_stream < 0) + return; + + s = &itv->streams[itv->cur_dma_stream]; + ivtv_stream_sync_for_cpu(s); + + if (data[0] & 0x18) { + IVTV_DEBUG_WARN("ENC DMA ERROR %x (offset %08x, xfer %d of %d, retry %d)\n", data[0], + s->dma_offset, s->sg_processed, s->sg_processing_size, itv->dma_retries); + write_reg(read_reg(IVTV_REG_DMASTATUS) & 3, IVTV_REG_DMASTATUS); + if (itv->dma_retries == 3) { + /* Too many retries, give up on this frame */ + itv->dma_retries = 0; + s->sg_processed = s->sg_processing_size; + } + else { + /* Retry, starting with the first xfer segment. + Just retrying the current segment is not sufficient. */ + s->sg_processed = 0; + itv->dma_retries++; + } + } + if (s->sg_processed < s->sg_processing_size) { + /* DMA next buffer */ + ivtv_dma_enc_start_xfer(s); + return; + } + clear_bit(IVTV_F_I_DMA, &itv->i_flags); + itv->cur_dma_stream = -1; + dma_post(s); + if (test_and_clear_bit(IVTV_F_S_DMA_HAS_VBI, &s->s_flags)) { + s = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + dma_post(s); + } + s->sg_processing_size = 0; + s->sg_processed = 0; + wake_up(&itv->dma_waitq); +} + +static void ivtv_irq_enc_pio_complete(struct ivtv *itv) +{ + struct ivtv_stream *s; + + if (itv->cur_pio_stream < 0 || itv->cur_pio_stream >= IVTV_MAX_STREAMS) { + itv->cur_pio_stream = -1; + return; + } + s = &itv->streams[itv->cur_pio_stream]; + IVTV_DEBUG_HI_IRQ("ENC PIO COMPLETE %s\n", s->name); + clear_bit(IVTV_F_I_PIO, &itv->i_flags); + itv->cur_pio_stream = -1; + dma_post(s); + if (s->type == IVTV_ENC_STREAM_TYPE_MPG) + ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, 0); + else if (s->type == IVTV_ENC_STREAM_TYPE_YUV) + ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, 1); + else if (s->type == IVTV_ENC_STREAM_TYPE_PCM) + ivtv_vapi(itv, CX2341X_ENC_SCHED_DMA_TO_HOST, 3, 0, 0, 2); + clear_bit(IVTV_F_I_PIO, &itv->i_flags); + if (test_and_clear_bit(IVTV_F_S_DMA_HAS_VBI, &s->s_flags)) { + s = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + dma_post(s); + } + wake_up(&itv->dma_waitq); +} + +static void ivtv_irq_dma_err(struct ivtv *itv) +{ + u32 data[CX2341X_MBOX_MAX_DATA]; + u32 status; + + del_timer(&itv->dma_timer); + + ivtv_api_get_data(&itv->enc_mbox, IVTV_MBOX_DMA_END, 2, data); + status = read_reg(IVTV_REG_DMASTATUS); + IVTV_DEBUG_WARN("DMA ERROR %08x %08x %08x %d\n", data[0], data[1], + status, itv->cur_dma_stream); + /* + * We do *not* write back to the IVTV_REG_DMASTATUS register to + * clear the error status, if either the encoder write (0x02) or + * decoder read (0x01) bus master DMA operation do not indicate + * completed. We can race with the DMA engine, which may have + * transitioned to completed status *after* we read the register. + * Setting a IVTV_REG_DMASTATUS flag back to "busy" status, after the + * DMA engine has completed, will cause the DMA engine to stop working. + */ + status &= 0x3; + if (status == 0x3) + write_reg(status, IVTV_REG_DMASTATUS); + + if (!test_bit(IVTV_F_I_UDMA, &itv->i_flags) && + itv->cur_dma_stream >= 0 && itv->cur_dma_stream < IVTV_MAX_STREAMS) { + struct ivtv_stream *s = &itv->streams[itv->cur_dma_stream]; + + if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { + /* retry */ + /* + * FIXME - handle cases of DMA error similar to + * encoder below, except conditioned on status & 0x1 + */ + ivtv_dma_dec_start(s); + return; + } else { + if ((status & 0x2) == 0) { + /* + * CX2341x Bus Master DMA write is ongoing. + * Reset the timer and let it complete. + */ + itv->dma_timer.expires = + jiffies + msecs_to_jiffies(600); + add_timer(&itv->dma_timer); + return; + } + + if (itv->dma_retries < 3) { + /* + * CX2341x Bus Master DMA write has ended. + * Retry the write, starting with the first + * xfer segment. Just retrying the current + * segment is not sufficient. + */ + s->sg_processed = 0; + itv->dma_retries++; + ivtv_dma_enc_start_xfer(s); + return; + } + /* Too many retries, give up on this one */ + } + + } + if (test_bit(IVTV_F_I_UDMA, &itv->i_flags)) { + ivtv_udma_start(itv); + return; + } + clear_bit(IVTV_F_I_UDMA, &itv->i_flags); + clear_bit(IVTV_F_I_DMA, &itv->i_flags); + itv->cur_dma_stream = -1; + wake_up(&itv->dma_waitq); +} + +static void ivtv_irq_enc_start_cap(struct ivtv *itv) +{ + u32 data[CX2341X_MBOX_MAX_DATA]; + struct ivtv_stream *s; + + /* Get DMA destination and size arguments from card */ + ivtv_api_get_data(&itv->enc_mbox, IVTV_MBOX_DMA, 7, data); + IVTV_DEBUG_HI_IRQ("ENC START CAP %d: %08x %08x\n", data[0], data[1], data[2]); + + if (data[0] > 2 || data[1] == 0 || data[2] == 0) { + IVTV_DEBUG_WARN("Unknown input: %08x %08x %08x\n", + data[0], data[1], data[2]); + return; + } + s = &itv->streams[ivtv_stream_map[data[0]]]; + if (!stream_enc_dma_append(s, data)) { + set_bit(ivtv_use_pio(s) ? IVTV_F_S_PIO_PENDING : IVTV_F_S_DMA_PENDING, &s->s_flags); + } +} + +static void ivtv_irq_enc_vbi_cap(struct ivtv *itv) +{ + u32 data[CX2341X_MBOX_MAX_DATA]; + struct ivtv_stream *s; + + IVTV_DEBUG_HI_IRQ("ENC START VBI CAP\n"); + s = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + + if (!stream_enc_dma_append(s, data)) + set_bit(ivtv_use_pio(s) ? IVTV_F_S_PIO_PENDING : IVTV_F_S_DMA_PENDING, &s->s_flags); +} + +static void ivtv_irq_dec_vbi_reinsert(struct ivtv *itv) +{ + u32 data[CX2341X_MBOX_MAX_DATA]; + struct ivtv_stream *s = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI]; + + IVTV_DEBUG_HI_IRQ("DEC VBI REINSERT\n"); + if (test_bit(IVTV_F_S_CLAIMED, &s->s_flags) && + !stream_enc_dma_append(s, data)) { + set_bit(IVTV_F_S_PIO_PENDING, &s->s_flags); + } +} + +static void ivtv_irq_dec_data_req(struct ivtv *itv) +{ + u32 data[CX2341X_MBOX_MAX_DATA]; + struct ivtv_stream *s; + + /* YUV or MPG */ + + if (test_bit(IVTV_F_I_DEC_YUV, &itv->i_flags)) { + ivtv_api_get_data(&itv->dec_mbox, IVTV_MBOX_DMA, 2, data); + itv->dma_data_req_size = + 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); + itv->dma_data_req_offset = data[1]; + if (atomic_read(&itv->yuv_info.next_dma_frame) >= 0) + ivtv_yuv_frame_complete(itv); + s = &itv->streams[IVTV_DEC_STREAM_TYPE_YUV]; + } + else { + ivtv_api_get_data(&itv->dec_mbox, IVTV_MBOX_DMA, 3, data); + itv->dma_data_req_size = min_t(u32, data[2], 0x10000); + itv->dma_data_req_offset = data[1]; + s = &itv->streams[IVTV_DEC_STREAM_TYPE_MPG]; + } + IVTV_DEBUG_HI_IRQ("DEC DATA REQ %s: %d %08x %u\n", s->name, s->q_full.bytesused, + itv->dma_data_req_offset, itv->dma_data_req_size); + if (itv->dma_data_req_size == 0 || s->q_full.bytesused < itv->dma_data_req_size) { + set_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); + } + else { + if (test_bit(IVTV_F_I_DEC_YUV, &itv->i_flags)) + ivtv_yuv_setup_stream_frame(itv); + clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); + ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); + ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 0); + } +} + +static void ivtv_irq_vsync(struct ivtv *itv) +{ + /* The vsync interrupt is unusual in that it won't clear until + * the end of the first line for the current field, at which + * point it clears itself. This can result in repeated vsync + * interrupts, or a missed vsync. Read some of the registers + * to determine the line being displayed and ensure we handle + * one vsync per frame. + */ + unsigned int frame = read_reg(IVTV_REG_DEC_LINE_FIELD) & 1; + struct yuv_playback_info *yi = &itv->yuv_info; + int last_dma_frame = atomic_read(&yi->next_dma_frame); + struct yuv_frame_info *f = &yi->new_frame_info[last_dma_frame]; + + if (0) IVTV_DEBUG_IRQ("DEC VSYNC\n"); + + if (((frame ^ f->sync_field) == 0 && + ((itv->last_vsync_field & 1) ^ f->sync_field)) || + (frame != (itv->last_vsync_field & 1) && !f->interlaced)) { + int next_dma_frame = last_dma_frame; + + if (!(f->interlaced && f->delay && yi->fields_lapsed < 1)) { + if (next_dma_frame >= 0 && next_dma_frame != atomic_read(&yi->next_fill_frame)) { + write_reg(yuv_offset[next_dma_frame] >> 4, 0x82c); + write_reg((yuv_offset[next_dma_frame] + IVTV_YUV_BUFFER_UV_OFFSET) >> 4, 0x830); + write_reg(yuv_offset[next_dma_frame] >> 4, 0x834); + write_reg((yuv_offset[next_dma_frame] + IVTV_YUV_BUFFER_UV_OFFSET) >> 4, 0x838); + next_dma_frame = (next_dma_frame + 1) % IVTV_YUV_BUFFERS; + atomic_set(&yi->next_dma_frame, next_dma_frame); + yi->fields_lapsed = -1; + yi->running = 1; + } + } + } + if (frame != (itv->last_vsync_field & 1)) { + static const struct v4l2_event evtop = { + .type = V4L2_EVENT_VSYNC, + .u.vsync.field = V4L2_FIELD_TOP, + }; + static const struct v4l2_event evbottom = { + .type = V4L2_EVENT_VSYNC, + .u.vsync.field = V4L2_FIELD_BOTTOM, + }; + struct ivtv_stream *s = ivtv_get_output_stream(itv); + + itv->last_vsync_field += 1; + if (frame == 0) { + clear_bit(IVTV_F_I_VALID_DEC_TIMINGS, &itv->i_flags); + clear_bit(IVTV_F_I_EV_VSYNC_FIELD, &itv->i_flags); + } + else { + set_bit(IVTV_F_I_EV_VSYNC_FIELD, &itv->i_flags); + } + if (test_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags)) { + set_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags); + wake_up(&itv->event_waitq); + if (s) + wake_up(&s->waitq); + } + if (s && s->vdev) + v4l2_event_queue(s->vdev, frame ? &evtop : &evbottom); + wake_up(&itv->vsync_waitq); + + /* Send VBI to saa7127 */ + if (frame && (itv->output_mode == OUT_PASSTHROUGH || + test_bit(IVTV_F_I_UPDATE_WSS, &itv->i_flags) || + test_bit(IVTV_F_I_UPDATE_VPS, &itv->i_flags) || + test_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags))) { + set_bit(IVTV_F_I_WORK_HANDLER_VBI, &itv->i_flags); + set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags); + } + + /* Check if we need to update the yuv registers */ + if (yi->running && (yi->yuv_forced_update || f->update)) { + if (!f->update) { + last_dma_frame = + (u8)(atomic_read(&yi->next_dma_frame) - + 1) % IVTV_YUV_BUFFERS; + f = &yi->new_frame_info[last_dma_frame]; + } + + if (f->src_w) { + yi->update_frame = last_dma_frame; + f->update = 0; + yi->yuv_forced_update = 0; + set_bit(IVTV_F_I_WORK_HANDLER_YUV, &itv->i_flags); + set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags); + } + } + + yi->fields_lapsed++; + } +} + +#define IVTV_IRQ_DMA (IVTV_IRQ_DMA_READ | IVTV_IRQ_ENC_DMA_COMPLETE | IVTV_IRQ_DMA_ERR | IVTV_IRQ_ENC_START_CAP | IVTV_IRQ_ENC_VBI_CAP | IVTV_IRQ_DEC_DATA_REQ | IVTV_IRQ_DEC_VBI_RE_INSERT) + +irqreturn_t ivtv_irq_handler(int irq, void *dev_id) +{ + struct ivtv *itv = (struct ivtv *)dev_id; + u32 combo; + u32 stat; + int i; + u8 vsync_force = 0; + + spin_lock(&itv->dma_reg_lock); + /* get contents of irq status register */ + stat = read_reg(IVTV_REG_IRQSTATUS); + + combo = ~itv->irqmask & stat; + + /* Clear out IRQ */ + if (combo) write_reg(combo, IVTV_REG_IRQSTATUS); + + if (0 == combo) { + /* The vsync interrupt is unusual and clears itself. If we + * took too long, we may have missed it. Do some checks + */ + if (~itv->irqmask & IVTV_IRQ_DEC_VSYNC) { + /* vsync is enabled, see if we're in a new field */ + if ((itv->last_vsync_field & 1) != + (read_reg(IVTV_REG_DEC_LINE_FIELD) & 1)) { + /* New field, looks like we missed it */ + IVTV_DEBUG_YUV("VSync interrupt missed %d\n", + read_reg(IVTV_REG_DEC_LINE_FIELD) >> 16); + vsync_force = 1; + } + } + + if (!vsync_force) { + /* No Vsync expected, wasn't for us */ + spin_unlock(&itv->dma_reg_lock); + return IRQ_NONE; + } + } + + /* Exclude interrupts noted below from the output, otherwise the log is flooded with + these messages */ + if (combo & ~0xff6d0400) + IVTV_DEBUG_HI_IRQ("======= valid IRQ bits: 0x%08x ======\n", combo); + + if (combo & IVTV_IRQ_DEC_DMA_COMPLETE) { + IVTV_DEBUG_HI_IRQ("DEC DMA COMPLETE\n"); + } + + if (combo & IVTV_IRQ_DMA_READ) { + ivtv_irq_dma_read(itv); + } + + if (combo & IVTV_IRQ_ENC_DMA_COMPLETE) { + ivtv_irq_enc_dma_complete(itv); + } + + if (combo & IVTV_IRQ_ENC_PIO_COMPLETE) { + ivtv_irq_enc_pio_complete(itv); + } + + if (combo & IVTV_IRQ_DMA_ERR) { + ivtv_irq_dma_err(itv); + } + + if (combo & IVTV_IRQ_ENC_START_CAP) { + ivtv_irq_enc_start_cap(itv); + } + + if (combo & IVTV_IRQ_ENC_VBI_CAP) { + ivtv_irq_enc_vbi_cap(itv); + } + + if (combo & IVTV_IRQ_DEC_VBI_RE_INSERT) { + ivtv_irq_dec_vbi_reinsert(itv); + } + + if (combo & IVTV_IRQ_ENC_EOS) { + IVTV_DEBUG_IRQ("ENC EOS\n"); + set_bit(IVTV_F_I_EOS, &itv->i_flags); + wake_up(&itv->eos_waitq); + } + + if (combo & IVTV_IRQ_DEC_DATA_REQ) { + ivtv_irq_dec_data_req(itv); + } + + /* Decoder Vertical Sync - We can't rely on 'combo', so check if vsync enabled */ + if (~itv->irqmask & IVTV_IRQ_DEC_VSYNC) { + ivtv_irq_vsync(itv); + } + + if (combo & IVTV_IRQ_ENC_VIM_RST) { + IVTV_DEBUG_IRQ("VIM RST\n"); + /*ivtv_vapi(itv, CX2341X_ENC_REFRESH_INPUT, 0); */ + } + + if (combo & IVTV_IRQ_DEC_AUD_MODE_CHG) { + IVTV_DEBUG_INFO("Stereo mode changed\n"); + } + + if ((combo & IVTV_IRQ_DMA) && !test_bit(IVTV_F_I_DMA, &itv->i_flags)) { + itv->irq_rr_idx++; + for (i = 0; i < IVTV_MAX_STREAMS; i++) { + int idx = (i + itv->irq_rr_idx) % IVTV_MAX_STREAMS; + struct ivtv_stream *s = &itv->streams[idx]; + + if (!test_and_clear_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) + continue; + if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) + ivtv_dma_dec_start(s); + else + ivtv_dma_enc_start(s); + break; + } + + if (i == IVTV_MAX_STREAMS && + test_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags)) + ivtv_udma_start(itv); + } + + if ((combo & IVTV_IRQ_DMA) && !test_bit(IVTV_F_I_PIO, &itv->i_flags)) { + itv->irq_rr_idx++; + for (i = 0; i < IVTV_MAX_STREAMS; i++) { + int idx = (i + itv->irq_rr_idx) % IVTV_MAX_STREAMS; + struct ivtv_stream *s = &itv->streams[idx]; + + if (!test_and_clear_bit(IVTV_F_S_PIO_PENDING, &s->s_flags)) + continue; + if (s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type < IVTV_DEC_STREAM_TYPE_MPG) + ivtv_dma_enc_start(s); + break; + } + } + + if (test_and_clear_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags)) { + queue_kthread_work(&itv->irq_worker, &itv->irq_work); + } + + spin_unlock(&itv->dma_reg_lock); + + /* If we've just handled a 'forced' vsync, it's safest to say it + * wasn't ours. Another device may have triggered it at just + * the right time. + */ + return vsync_force ? IRQ_NONE : IRQ_HANDLED; +} + +void ivtv_unfinished_dma(unsigned long arg) +{ + struct ivtv *itv = (struct ivtv *)arg; + + if (!test_bit(IVTV_F_I_DMA, &itv->i_flags)) + return; + IVTV_ERR("DMA TIMEOUT %08x %d\n", read_reg(IVTV_REG_DMASTATUS), itv->cur_dma_stream); + + write_reg(read_reg(IVTV_REG_DMASTATUS) & 3, IVTV_REG_DMASTATUS); + clear_bit(IVTV_F_I_UDMA, &itv->i_flags); + clear_bit(IVTV_F_I_DMA, &itv->i_flags); + itv->cur_dma_stream = -1; + wake_up(&itv->dma_waitq); +} |