diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sh/fsi.c | 162 |
1 files changed, 67 insertions, 95 deletions
diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c index 3448170debe4..82c6190b46f3 100644 --- a/sound/soc/sh/fsi.c +++ b/sound/soc/sh/fsi.c @@ -560,16 +560,18 @@ static void fsi_soft_all_reset(struct fsi_master *master) mdelay(10); } -/* playback interrupt */ -static int fsi_data_push(struct fsi_priv *fsi, int startup) +static int fsi_fifo_data_ctrl(struct fsi_priv *fsi, int startup, int is_play) { struct snd_pcm_runtime *runtime; struct snd_pcm_substream *substream = NULL; u32 status; - int push_num; - int push_num_max; + u32 status_reg = is_play ? DOFF_ST : DIFF_ST; + int data_residue_num; + int data_num; + int data_num_max; int ch_width; int over_period; + void (*fn)(struct fsi_priv *fsi, int size); if (!fsi || !fsi->substream || @@ -596,29 +598,63 @@ static int fsi_data_push(struct fsi_priv *fsi, int startup) /* get 1 channel data width */ ch_width = frames_to_bytes(runtime, 1) / fsi->chan_num; - /* number of push data */ - push_num = fsi_len2num(fsi->buff_len - fsi->buff_offset, ch_width); - - /* max number of push data */ - push_num_max = (fsi->fifo_max_num * fsi->chan_num) - - fsi_get_fifo_data_num(fsi, 1); + /* get residue data number of alsa */ + data_residue_num = fsi_len2num(fsi->buff_len - fsi->buff_offset, + ch_width); + + if (is_play) { + /* + * for play-back + * + * data_num_max : number of FSI fifo free space + * data_num : number of ALSA residue data + */ + data_num_max = fsi->fifo_max_num * fsi->chan_num; + data_num_max -= fsi_get_fifo_data_num(fsi, is_play); + + data_num = data_residue_num; + + switch (ch_width) { + case 2: + fn = fsi_dma_soft_push16; + break; + case 4: + fn = fsi_dma_soft_push32; + break; + default: + return -EINVAL; + } + } else { + /* + * for capture + * + * data_num_max : number of ALSA free space + * data_num : number of data in FSI fifo + */ + data_num_max = data_residue_num; + data_num = fsi_get_fifo_data_num(fsi, is_play); + + switch (ch_width) { + case 2: + fn = fsi_dma_soft_pop16; + break; + case 4: + fn = fsi_dma_soft_pop32; + break; + default: + return -EINVAL; + } + } - push_num = min(push_num, push_num_max); + data_num = min(data_num, data_num_max); - switch (ch_width) { - case 2: - fsi_dma_soft_push16(fsi, push_num); - break; - case 4: - fsi_dma_soft_push32(fsi, push_num); - break; - default: - return -EINVAL; - } + fn(fsi, data_num); - fsi->buff_offset += fsi_num2offset(push_num, ch_width); + /* update buff_offset */ + fsi->buff_offset += fsi_num2offset(data_num, ch_width); - status = fsi_reg_read(fsi, DOFF_ST); + /* check fifo status */ + status = fsi_reg_read(fsi, status_reg); if (!startup) { struct snd_soc_dai *dai = fsi_get_dai(substream); @@ -627,9 +663,10 @@ static int fsi_data_push(struct fsi_priv *fsi, int startup) if (status & ERR_UNDER) dev_err(dai->dev, "under run\n"); } - fsi_reg_write(fsi, DOFF_ST, 0); + fsi_reg_write(fsi, status_reg, 0); - fsi_irq_enable(fsi, 1); + /* re-enable irq */ + fsi_irq_enable(fsi, is_play); if (over_period) snd_pcm_period_elapsed(substream); @@ -639,77 +676,12 @@ static int fsi_data_push(struct fsi_priv *fsi, int startup) static int fsi_data_pop(struct fsi_priv *fsi, int startup) { - struct snd_pcm_runtime *runtime; - struct snd_pcm_substream *substream = NULL; - u32 status; - int pop_num; - int pop_num_max; - int ch_width; - int over_period; - - if (!fsi || - !fsi->substream || - !fsi->substream->runtime) - return -EINVAL; - - over_period = 0; - substream = fsi->substream; - runtime = substream->runtime; - - /* FSI FIFO has limit. - * So, this driver can not send periods data at a time - */ - if (fsi->buff_offset >= - fsi_num2offset(fsi->period_num + 1, fsi->period_len)) { - - over_period = 1; - fsi->period_num = (fsi->period_num + 1) % runtime->periods; - - if (0 == fsi->period_num) - fsi->buff_offset = 0; - } - - /* get 1 channel data width */ - ch_width = frames_to_bytes(runtime, 1) / fsi->chan_num; - - /* get free space for alsa */ - pop_num_max = fsi_len2num(fsi->buff_len - fsi->buff_offset, ch_width); - - /* get recv size */ - pop_num = fsi_get_fifo_data_num(fsi, 0); - - pop_num = min(pop_num_max, pop_num); - - switch (ch_width) { - case 2: - fsi_dma_soft_pop16(fsi, pop_num); - break; - case 4: - fsi_dma_soft_pop32(fsi, pop_num); - break; - default: - return -EINVAL; - } - - fsi->buff_offset += fsi_num2offset(pop_num, ch_width); - - status = fsi_reg_read(fsi, DIFF_ST); - if (!startup) { - struct snd_soc_dai *dai = fsi_get_dai(substream); - - if (status & ERR_OVER) - dev_err(dai->dev, "over run\n"); - if (status & ERR_UNDER) - dev_err(dai->dev, "under run\n"); - } - fsi_reg_write(fsi, DIFF_ST, 0); - - fsi_irq_enable(fsi, 0); - - if (over_period) - snd_pcm_period_elapsed(substream); + return fsi_fifo_data_ctrl(fsi, startup, 0); +} - return 0; +static int fsi_data_push(struct fsi_priv *fsi, int startup) +{ + return fsi_fifo_data_ctrl(fsi, startup, 1); } static irqreturn_t fsi_interrupt(int irq, void *data) |
