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author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2014-06-22 17:55:59 -0700 |
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committer | Mark Brown <broonie@linaro.org> | 2014-06-28 14:41:18 +0100 |
commit | 8457e0e9e274cae4898f84dd5aaeb5d2098126c8 (patch) | |
tree | c014473b23d6d09f79c061f4b9f444a2d69fdfe8 /sound/soc/sh | |
parent | d403e24908836cf80531519530a9be84426e3a3f (diff) | |
download | linux-8457e0e9e274cae4898f84dd5aaeb5d2098126c8.tar.bz2 |
ASoC: fsi: use dmaengine_prep_dma_cyclic() for DMA transfer
Current FSI driver is using DMAEngine directly,
but, ASoC is requesting to use common DMA transfer method,
like snd_dmaengine_pcm_trigger() or dmaengine_pcm_ops.
It is difficult to switch at this point, since Renesas
driver is also supporting PIO transfer.
This patch uses dmaengine_prep_dma_cyclic() instead
of dmaengine_prep_slave_single().
It is used in requested method,
and is good first step to switch over.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/sh')
-rw-r--r-- | sound/soc/sh/fsi.c | 94 |
1 files changed, 27 insertions, 67 deletions
diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c index 820a40833c04..a57eb96e57eb 100644 --- a/sound/soc/sh/fsi.c +++ b/sound/soc/sh/fsi.c @@ -232,10 +232,7 @@ struct fsi_stream { * these are for DMAEngine */ struct dma_chan *chan; - struct work_struct work; int dma_id; - int loop_cnt; - int additional_pos; }; struct fsi_clk { @@ -1281,24 +1278,9 @@ static int fsi_dma_init(struct fsi_priv *fsi, struct fsi_stream *io) io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) | BUSOP_SET(16, PACKAGE_16BITBUS_STREAM); - io->loop_cnt = 2; /* push 1st, 2nd period first, then 3rd, 4th... */ - io->additional_pos = 0; - return 0; } -static dma_addr_t fsi_dma_get_area(struct fsi_stream *io, int additional) -{ - struct snd_pcm_runtime *runtime = io->substream->runtime; - int period = io->period_pos + additional; - - if (period >= runtime->periods) - period = 0; - - return runtime->dma_addr + - samples_to_bytes(runtime, period * io->period_samples); -} - static void fsi_dma_complete(void *data) { struct fsi_stream *io = (struct fsi_stream *)data; @@ -1307,53 +1289,37 @@ static void fsi_dma_complete(void *data) fsi_pointer_update(io, io->period_samples); fsi_count_fifo_err(fsi); - fsi_stream_transfer(io); } -static void fsi_dma_do_work(struct work_struct *work) +static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io) { - struct fsi_stream *io = container_of(work, struct fsi_stream, work); - struct fsi_priv *fsi = fsi_stream_to_priv(io); - struct snd_soc_dai *dai; + struct snd_soc_dai *dai = fsi_get_dai(io->substream); + struct snd_pcm_substream *substream = io->substream; struct dma_async_tx_descriptor *desc; - struct snd_pcm_runtime *runtime; - enum dma_data_direction dir; int is_play = fsi_stream_is_play(fsi, io); - int len, i; - dma_addr_t buf; - - if (!fsi_stream_is_working(fsi, io)) - return; - - dai = fsi_get_dai(io->substream); - runtime = io->substream->runtime; - dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; - len = samples_to_bytes(runtime, io->period_samples); - - for (i = 0; i < io->loop_cnt; i++) { - buf = fsi_dma_get_area(io, io->additional_pos); - - desc = dmaengine_prep_slave_single(io->chan, buf, len, dir, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - if (!desc) { - dev_err(dai->dev, "dmaengine_prep_slave_sg() fail\n"); - return; - } - - desc->callback = fsi_dma_complete; - desc->callback_param = io; - - if (dmaengine_submit(desc) < 0) { - dev_err(dai->dev, "tx_submit() fail\n"); - return; - } + enum dma_data_direction dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; + int ret = -EIO; + + desc = dmaengine_prep_dma_cyclic(io->chan, + substream->runtime->dma_addr, + snd_pcm_lib_buffer_bytes(substream), + snd_pcm_lib_period_bytes(substream), + dir, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!desc) { + dev_err(dai->dev, "dmaengine_prep_dma_cyclic() fail\n"); + goto fsi_dma_transfer_err; + } - dma_async_issue_pending(io->chan); + desc->callback = fsi_dma_complete; + desc->callback_param = io; - io->additional_pos = 1; + if (dmaengine_submit(desc) < 0) { + dev_err(dai->dev, "tx_submit() fail\n"); + goto fsi_dma_transfer_err; } - io->loop_cnt = 1; + dma_async_issue_pending(io->chan); /* * FIXME @@ -1370,13 +1336,11 @@ static void fsi_dma_do_work(struct work_struct *work) fsi_reg_write(fsi, DIFF_ST, 0); } } -} -static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io) -{ - schedule_work(&io->work); + ret = 0; - return 0; +fsi_dma_transfer_err: + return ret; } static int fsi_dma_push_start_stop(struct fsi_priv *fsi, struct fsi_stream *io, @@ -1437,15 +1401,11 @@ static int fsi_dma_probe(struct fsi_priv *fsi, struct fsi_stream *io, struct dev return fsi_stream_probe(fsi, dev); } - INIT_WORK(&io->work, fsi_dma_do_work); - return 0; } static int fsi_dma_remove(struct fsi_priv *fsi, struct fsi_stream *io) { - cancel_work_sync(&io->work); - fsi_stream_stop(fsi, io); if (io->chan) @@ -1618,9 +1578,9 @@ static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd, if (!ret) ret = fsi_hw_startup(fsi, io, dai->dev); if (!ret) - ret = fsi_stream_transfer(io); + ret = fsi_stream_start(fsi, io); if (!ret) - fsi_stream_start(fsi, io); + ret = fsi_stream_transfer(io); break; case SNDRV_PCM_TRIGGER_STOP: if (!ret) |