static int lola_pcm_prepare(struct snd_pcm_substream *substream)
{
struct lola *chip = snd_pcm_substream_chip(substream);
struct lola_pcm *pcm = lola_get_pcm(substream);
struct lola_stream *str = lola_get_stream(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int bufsize, period_bytes, format_verb;
int i, err;
mutex_lock(&chip->open_mutex);
lola_stream_reset(chip, str);
lola_cleanup_slave_streams(pcm, str);
if (str->index + runtime->channels > pcm->num_streams) {
mutex_unlock(&chip->open_mutex);
return -EINVAL;
}
for (i = 1; i < runtime->channels; i++) {
str[i].master = str;
str[i].opened = 1;
}
mutex_unlock(&chip->open_mutex);
bufsize = snd_pcm_lib_buffer_bytes(substream);
period_bytes = snd_pcm_lib_period_bytes(substream);
format_verb = lola_get_format_verb(substream);
str->bufsize = bufsize;
str->period_bytes = period_bytes;
str->format_verb = format_verb;
err = lola_setup_periods(chip, pcm, substream, str);
if (err < 0)
return err;
err = lola_set_sample_rate(chip, runtime->rate);
if (err < 0)
return err;
chip->sample_rate = runtime->rate; /* sample rate gets locked */
err = lola_set_stream_config(chip, str, runtime->channels);
if (err < 0)
return err;
err = lola_setup_controller(chip, pcm, str);
if (err < 0) {
lola_stream_reset(chip, str);
return err;
}
return 0;
}
static enum hrtimer_restart afe_hrtimer_rec_callback(struct hrtimer *hrt)
{
struct pcm_afe_info *prtd =
container_of(hrt, struct pcm_afe_info, hrt);
struct snd_pcm_substream *substream = prtd->substream;
struct snd_pcm_runtime *runtime = substream->runtime;
if (prtd->start) {
if (prtd->dsp_cnt == runtime->periods)
prtd->dsp_cnt = 0;
afe_rt_proxy_port_read(
(prtd->dma_addr + (prtd->dsp_cnt
* snd_pcm_lib_period_bytes(prtd->substream))),
snd_pcm_lib_period_bytes(prtd->substream));
prtd->dsp_cnt++;
pr_debug("sending frame rec to DSP: poll_time: %d\n",
prtd->poll_time);
hrtimer_forward_now(hrt, ns_to_ktime(prtd->poll_time
* 1000));
return HRTIMER_RESTART;
} else
return HRTIMER_NORESTART;
}
static int
snd_ad1889_playback_prepare(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
unsigned int size = snd_pcm_lib_buffer_bytes(ss);
unsigned int count = snd_pcm_lib_period_bytes(ss);
u16 reg;
ad1889_channel_reset(chip, AD_CHAN_WAV);
reg = ad1889_readw(chip, AD_DS_WSMC);
/* Mask out 16-bit / Stereo */
reg &= ~(AD_DS_WSMC_WA16 | AD_DS_WSMC_WAST);
if (snd_pcm_format_width(rt->format) == 16)
reg |= AD_DS_WSMC_WA16;
if (rt->channels > 1)
reg |= AD_DS_WSMC_WAST;
/* let's make sure we don't clobber ourselves */
spin_lock_irq(&chip->lock);
chip->wave.size = size;
chip->wave.reg = reg;
chip->wave.addr = rt->dma_addr;
ad1889_writew(chip, AD_DS_WSMC, chip->wave.reg);
/* Set sample rates on the codec */
ad1889_writew(chip, AD_DS_WAS, rt->rate);
/* Set up DMA */
ad1889_load_wave_buffer_address(chip, chip->wave.addr);
ad1889_load_wave_buffer_count(chip, size);
ad1889_load_wave_interrupt_count(chip, count);
/* writes flush */
ad1889_readw(chip, AD_DS_WSMC);
spin_unlock_irq(&chip->lock);
ad1889_debug("prepare playback: addr = 0x%x, count = %u, "
"size = %u, reg = 0x%x, rate = %u\n", chip->wave.addr,
count, size, reg, rt->rate);
return 0;
}
static enum hrtimer_restart afe_hrtimer_rec_callback(struct hrtimer *hrt)
{
struct pcm_afe_info *prtd =
container_of(hrt, struct pcm_afe_info, hrt);
struct snd_pcm_substream *substream = prtd->substream;
struct snd_pcm_runtime *runtime = substream->runtime;
u32 mem_map_handle = 0;
int ret;
mem_map_handle = afe_req_mmap_handle(prtd->audio_client);
if (!mem_map_handle)
pr_err("%s: mem_map_handle is NULL\n", __func__);
if (prtd->start) {
if (prtd->dsp_cnt == runtime->periods)
prtd->dsp_cnt = 0;
pr_debug("%s: mem_map_handle 0x%x\n", __func__, mem_map_handle);
ret = afe_rt_proxy_port_read(
(prtd->dma_addr + (prtd->dsp_cnt
* snd_pcm_lib_period_bytes(prtd->substream))), mem_map_handle,
snd_pcm_lib_period_bytes(prtd->substream));
if (ret < 0) {
pr_err("%s: AFE port read fails: %d\n", __func__, ret);
prtd->start = 0;
return HRTIMER_NORESTART;
}
prtd->dsp_cnt++;
pr_debug("sending frame rec to DSP: poll_time: %d\n",
prtd->poll_time);
hrtimer_forward_now(hrt, ns_to_ktime(prtd->poll_time
* 1000));
return HRTIMER_RESTART;
} else
return HRTIMER_NORESTART;
}
int msm_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_audio *prtd = runtime->private_data;
prtd->out_head = 0; /* point to First buffer on startup */
prtd->mmap_flag = 1;
runtime->dma_bytes = snd_pcm_lib_period_bytes(substream)*2;
dma_mmap_coherent(substream->pcm->card->dev, vma,
runtime->dma_area,
runtime->dma_addr,
runtime->dma_bytes);
return 0;
}
static int msm_pcm_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_audio *prtd = runtime->private_data;
struct audmgr_config cfg;
int rc;
prtd->pcm_size = snd_pcm_lib_buffer_bytes(substream);
prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
prtd->pcm_irq_pos = 0;
prtd->pcm_buf_pos = 0;
/* rate and channels are sent to audio driver */
prtd->samp_rate = convert_samp_rate(runtime->rate);
prtd->samp_rate_index = convert_dsp_samp_index(runtime->rate);
prtd->channel_mode = (runtime->channels - 1);
prtd->buffer_size = prtd->channel_mode ? STEREO_DATA_SIZE : \
MONO_DATA_SIZE;
if (prtd->enabled == 1)
return 0;
prtd->type = AUDREC_CMD_TYPE_0_INDEX_WAV;
cfg.tx_rate = convert_samp_rate(runtime->rate);
cfg.rx_rate = RPC_AUD_DEF_SAMPLE_RATE_NONE;
cfg.def_method = RPC_AUD_DEF_METHOD_RECORD;
cfg.codec = RPC_AUD_DEF_CODEC_PCM;
cfg.snd_method = RPC_SND_METHOD_MIDI;
rc = audmgr_enable(&prtd->audmgr, &cfg);
if (rc < 0)
return rc;
if (msm_adsp_enable(prtd->audpre)) {
audmgr_disable(&prtd->audmgr);
return -ENODEV;
}
if (msm_adsp_enable(prtd->audrec)) {
msm_adsp_disable(prtd->audpre);
audmgr_disable(&prtd->audmgr);
return -ENODEV;
}
prtd->enabled = 1;
alsa_rec_dsp_enable(prtd, 1);
return 0;
}
static int msm_pcm_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_audio *prtd = runtime->private_data;
prtd->pcm_size = snd_pcm_lib_buffer_bytes(substream);
prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
prtd->pcm_irq_pos = 0;
prtd->pcm_buf_pos = 0;
/* rate and channels are sent to audio driver */
prtd->out_sample_rate = runtime->rate;
prtd->out_channel_mode = runtime->channels;
return 0;
}
static int
snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
unsigned int size = snd_pcm_lib_buffer_bytes(ss);
unsigned int count = snd_pcm_lib_period_bytes(ss);
u16 reg;
ad1889_channel_reset(chip, AD_CHAN_ADC);
reg = ad1889_readw(chip, AD_DS_RAMC);
/* Mask out 16-bit / Stereo */
reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
if (snd_pcm_format_width(rt->format) == 16)
reg |= AD_DS_RAMC_AD16;
if (rt->channels > 1)
reg |= AD_DS_RAMC_ADST;
/* let's make sure we don't clobber ourselves */
spin_lock_irq(&chip->lock);
chip->ramc.size = size;
chip->ramc.reg = reg;
chip->ramc.addr = rt->dma_addr;
ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
/* Set up DMA */
ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
ad1889_load_adc_buffer_count(chip, size);
ad1889_load_adc_interrupt_count(chip, count);
/* writes flush */
ad1889_readw(chip, AD_DS_RAMC);
spin_unlock_irq(&chip->lock);
dev_dbg(chip->card->dev,
"prepare capture: addr = 0x%x, count = %u, size = %u, reg = 0x%x, rate = %u\n",
chip->ramc.addr, count, size, reg, rt->rate);
return 0;
}
static void msm_pcm_enqueue_data(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_audio *prtd = runtime->private_data;
unsigned int period_size;
pr_debug("prtd->out_tail =%d mmap_flag=%d\n",
prtd->out_tail, prtd->mmap_flag);
period_size = snd_pcm_lib_period_bytes(substream);
alsa_dsp_send_buffer(prtd, prtd->out_tail, period_size);
prtd->out_tail ^= 1;
++copy_count;
prtd->period++;
if (unlikely(prtd->period >= runtime->periods))
prtd->period = 0;
}
static int
snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
unsigned int size = snd_pcm_lib_buffer_bytes(ss);
unsigned int count = snd_pcm_lib_period_bytes(ss);
u16 reg;
ad1889_channel_reset(chip, AD_CHAN_ADC);
reg = ad1889_readw(chip, AD_DS_RAMC);
reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
if (snd_pcm_format_width(rt->format) == 16)
reg |= AD_DS_RAMC_AD16;
if (rt->channels > 1)
reg |= AD_DS_RAMC_ADST;
spin_lock_irq(&chip->lock);
chip->ramc.size = size;
chip->ramc.reg = reg;
chip->ramc.addr = rt->dma_addr;
ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
ad1889_load_adc_buffer_count(chip, size);
ad1889_load_adc_interrupt_count(chip, count);
ad1889_readw(chip, AD_DS_RAMC);
spin_unlock_irq(&chip->lock);
ad1889_debug("prepare capture: addr = 0x%x, count = %u, "
"size = %u, reg = 0x%x, rate = %u\n", chip->ramc.addr,
count, size, reg, rt->rate);
return 0;
}
static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
int lch = prtd->slave_lch;
unsigned int period_size;
unsigned int dma_offset;
dma_addr_t dma_pos;
dma_addr_t src, dst;
unsigned short src_bidx, dst_bidx;
unsigned int data_type;
unsigned int count;
period_size = snd_pcm_lib_period_bytes(substream);
dma_offset = prtd->period * period_size;
dma_pos = runtime->dma_addr + dma_offset;
pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
"dma_ptr = %x period_size=%x\n", lch, dma_pos, period_size);
data_type = prtd->params->data_type;
count = period_size / data_type;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
src = dma_pos;
dst = prtd->params->dma_addr;
src_bidx = data_type;
dst_bidx = 0;
} else {
src = prtd->params->dma_addr;
dst = dma_pos;
src_bidx = 0;
dst_bidx = data_type;
}
davinci_set_dma_src_params(lch, src, INCR, W8BIT);
davinci_set_dma_dest_params(lch, dst, INCR, W8BIT);
davinci_set_dma_src_index(lch, src_bidx, 0);
davinci_set_dma_dest_index(lch, dst_bidx, 0);
davinci_set_dma_transfer_params(lch, data_type, count, 1, 0, ASYNC);
prtd->period++;
if (unlikely(prtd->period >= runtime->periods))
prtd->period = 0;
}
/* prepare callback */
static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
audio_info(" .. IN\n");
alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream);
alsa_stream->period_size = snd_pcm_lib_period_bytes(substream);
alsa_stream->pos = 0;
audio_debug("buffer_size=%d, period_size=%d pos=%d frame_bits=%d\n",
alsa_stream->buffer_size, alsa_stream->period_size,
alsa_stream->pos, runtime->frame_bits);
audio_info(" .. OUT\n");
return 0;
}
static int omap_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
struct omap_pcm_dma_data *dma_data = prtd->dma_data;
struct omap_dma_channel_params dma_params;
memset(&dma_params, 0, sizeof(dma_params));
/*
* Note: Regardless of interface data formats supported by OMAP McBSP
* or EAC blocks, internal representation is always fixed 16-bit/sample
*/
dma_params.data_type = OMAP_DMA_DATA_TYPE_S16;
dma_params.trigger = dma_data->dma_req;
dma_params.sync_mode = OMAP_DMA_SYNC_ELEMENT;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dma_params.src_amode = OMAP_DMA_AMODE_POST_INC;
dma_params.dst_amode = OMAP_DMA_AMODE_CONSTANT;
dma_params.src_or_dst_synch = OMAP_DMA_DST_SYNC;
dma_params.src_start = runtime->dma_addr;
dma_params.dst_start = dma_data->port_addr;
dma_params.dst_port = OMAP_DMA_PORT_MPUI;
} else {
dma_params.src_amode = OMAP_DMA_AMODE_CONSTANT;
dma_params.dst_amode = OMAP_DMA_AMODE_POST_INC;
dma_params.src_or_dst_synch = OMAP_DMA_SRC_SYNC;
dma_params.src_start = dma_data->port_addr;
dma_params.dst_start = runtime->dma_addr;
dma_params.src_port = OMAP_DMA_PORT_MPUI;
}
/*
* Set DMA transfer frame size equal to ALSA period size and frame
* count as no. of ALSA periods. Then with DMA frame interrupt enabled,
* we can transfer the whole ALSA buffer with single DMA transfer but
* still can get an interrupt at each period bounary
*/
dma_params.elem_count = snd_pcm_lib_period_bytes(substream) / 2;
dma_params.frame_count = runtime->periods;
omap_set_dma_params(prtd->dma_ch, &dma_params);
omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ);
return 0;
}
static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dummy_pcm *dpcm = runtime->private_data;
unsigned int bps;
bps = runtime->rate * runtime->channels;
bps *= snd_pcm_format_width(runtime->format);
bps /= 8;
if (bps <= 0)
return -EINVAL;
dpcm->pcm_bps = bps;
dpcm->pcm_jiffie = bps / HZ;
dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
dpcm->pcm_irq_pos = 0;
dpcm->pcm_buf_pos = 0;
return 0;
}
static int ipq_pcm_mi2s_prepare(struct snd_pcm_substream *substream)
{
int ret;
struct snd_pcm_runtime *runtime = substream->runtime;
struct dai_dma_params dma_params;
struct ipq_lpass_runtime_data_t *prtd =
(struct ipq_lpass_runtime_data_t *)runtime->private_data;
if (!prtd) {
pr_err("%s %d:Error in getting runtime data\n",
__func__, __LINE__);
return -EINVAL;
}
/*
* This is the case for under\over-run, we have already
* configured the DMA registers for this stream
*/
if (prtd->pcm_stream_info.pcm_prepare_start)
return 0;
ipq_lpaif_dma_stop(prtd->lpaif_info.dma_ch);
prtd->pcm_stream_info.pcm_prepare_start = 1;
prtd->lpaif_info.lpa_if_dma_start = 0;
memset(&dma_params, 0, sizeof(dma_params));
dma_params.src_start = runtime->dma_addr;
dma_params.buffer_size = snd_pcm_lib_buffer_bytes(substream);
dma_params.period_size = snd_pcm_lib_period_bytes(substream);
dma_params.channels = runtime->channels;
ret = ipq_lpaif_cfg_dma(prtd->lpaif_info.dma_ch, &dma_params,
prtd->pcm_stream_info.bit_width,
1 /*enable intr*/);
if (ret)
return -EINVAL;
ipq_lpaif_register_dma_irq_handler(prtd->lpaif_info.dma_ch,
ipq_mi2s_irq, (void *)substream);
return 0;
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
unsigned long flags = DMA_CTRL_ACK;
direction = snd_pcm_substream_to_dma_direction(substream);
if (!substream->runtime->no_period_wakeup)
flags |= DMA_PREP_INTERRUPT;
prtd->pos = 0;
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction, flags);
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
prtd->cookie = dmaengine_submit(desc);
#ifdef CONFIG_SND_PXA_SSP_DUMP
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK
&& ssp_playback_enable) {
prtd->playback_totsize = snd_pcm_lib_buffer_bytes(substream);
prtd->playback_transfer_addr = substream->runtime->dma_addr;
prtd->playback_dump_addr = substream->runtime->dma_addr;
} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& ssp_capture_enable) {
prtd->capture_totsize = snd_pcm_lib_buffer_bytes(substream);
prtd->capture_transfer_addr = substream->runtime->dma_addr;
prtd->capture_dump_addr = substream->runtime->dma_addr;
}
#endif
return 0;
}
static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dummy_pcm *dpcm = runtime->private_data;
int bps;
bps = snd_pcm_format_width(runtime->format) * runtime->rate * runtime->channels / 8;
if (bps <= 0)
return -EINVAL;
dpcm->pcm_bps = bps;
dpcm->pcm_hz = HZ;
dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);
dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream);
dpcm->pcm_irq_pos = 0;
dpcm->pcm_buf_pos = 0;
snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
return 0;
}
static void pcsp_pointer_update(struct snd_pcsp *chip)
{
struct snd_pcm_substream *substream;
size_t period_bytes, buffer_bytes;
int periods_elapsed;
unsigned long flags;
/* update the playback position */
substream = chip->playback_substream;
if (!substream)
return;
period_bytes = snd_pcm_lib_period_bytes(substream);
buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
spin_lock_irqsave(&chip->substream_lock, flags);
chip->playback_ptr += PCSP_INDEX_INC() * chip->fmt_size;
periods_elapsed = chip->playback_ptr - chip->period_ptr;
if (periods_elapsed < 0) {
#if PCSP_DEBUG
printk(KERN_INFO "PCSP: buffer_bytes mod period_bytes != 0 ? "
"(%zi %zi %zi)\n",
chip->playback_ptr, period_bytes, buffer_bytes);
#endif
periods_elapsed += buffer_bytes;
}
periods_elapsed /= period_bytes;
/* wrap the pointer _before_ calling snd_pcm_period_elapsed(),
* or ALSA will BUG on us. */
chip->playback_ptr %= buffer_bytes;
if (periods_elapsed) {
chip->period_ptr += periods_elapsed * period_bytes;
chip->period_ptr %= buffer_bytes;
}
spin_unlock_irqrestore(&chip->substream_lock, flags);
if (periods_elapsed)
tasklet_schedule(&pcsp_pcm_tasklet);
}
static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
struct snd_pcm_substream **subs)
{
int stream, pb, *cnt;
struct snd_pcm_substream *sub;
for (stream = 0; stream < dev->n_streams; stream++) {
sub = subs[stream];
if (!sub)
continue;
pb = snd_pcm_lib_period_bytes(sub);
cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
&dev->period_out_count[stream] :
&dev->period_in_count[stream];
if (*cnt >= pb) {
snd_pcm_period_elapsed(sub);
*cnt %= pb;
}
}
}
/* Lock me. */
static inline char *bcm947xx_from_linear(struct snd_pcm_substream *substream, snd_pcm_uframes_t pos)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct bcm947xx_runtime_data *brtd = runtime->private_data;
unsigned int slot;
unsigned int extrabytes;
char *hwbuf;
/* Current slot (0-index). */
slot = pos / runtime->period_size;
/* Extra bytes in descriptor (header + unused). */
extrabytes = BCM947XX_DMA_DATA_BYTES_MAX - snd_pcm_lib_period_bytes(substream);
/* Calculate DMA buffer position by adding the unused
* and header offset bytes. */
hwbuf = runtime->dma_area + /* base offset */
slot * extrabytes + /* all per slot extra up before current slot */
frames_to_bytes(runtime, pos) + /* position in slot */
brtd->dma_ofs; /* header offset in current slot */
return hwbuf;
}
static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
{
u16 current_ptr;
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_als300_substream_data *data;
unsigned short period_bytes;
data = substream->runtime->private_data;
period_bytes = snd_pcm_lib_period_bytes(substream);
spin_lock(&chip->reg_lock);
current_ptr = (u16) snd_als300_gcr_read(chip->port,
data->block_counter_register) + 4;
spin_unlock(&chip->reg_lock);
if (current_ptr > period_bytes)
current_ptr = 0;
else
current_ptr = period_bytes - current_ptr;
if (data->period_flipflop == 0)
current_ptr += period_bytes;
snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
return bytes_to_frames(substream->runtime, current_ptr);
}
static int msm_pcm_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_audio *prtd = runtime->private_data;
prtd->pcm_size = snd_pcm_lib_buffer_bytes(substream);
prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
prtd->pcm_irq_pos = 0;
prtd->pcm_buf_pos = 0;
/* rate and channels are sent to audio driver */
prtd->out_sample_rate = runtime->rate;
prtd->out_channel_mode = runtime->channels;
if (prtd->enabled | !(prtd->mmap_flag))
return 0;
prtd->data = substream->dma_buffer.area;
prtd->phys = substream->dma_buffer.addr;
prtd->out[0].data = prtd->data + 0;
prtd->out[0].addr = prtd->phys + 0;
prtd->out[0].size = BUFSZ;
prtd->out[1].data = prtd->data + BUFSZ;
prtd->out[1].addr = prtd->phys + BUFSZ;
prtd->out[1].size = BUFSZ;
prtd->out[0].used = prtd->pcm_count;
prtd->out[1].used = prtd->pcm_count;
mutex_lock(&the_locks.lock);
alsa_audio_configure(prtd);
mutex_unlock(&the_locks.lock);
return 0;
}
static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
direction = snd_pcm_substream_to_dma_direction(substream);
prtd->pos = 0;
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream), direction);
if (!desc)
return -ENOMEM;
desc->callback = dmaengine_pcm_dma_complete;
desc->callback_param = substream;
prtd->cookie = dmaengine_submit(desc);
return 0;
}
static void dmaengine_pcm_dma_complete(void *arg)
{
struct snd_pcm_substream *substream = NULL;
struct dmaengine_pcm_runtime_data *prtd = NULL;
unsigned long flags;
substream = arg;
if (!substream) {
return;
}
snd_pcm_stream_lock_irqsave(substream, flags);
if (!substream->runtime) {
snd_pcm_stream_unlock_irqrestore(substream, flags);
return;
}
prtd = substream_to_prtd(substream);
prtd->pos += snd_pcm_lib_period_bytes(substream);
if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
prtd->pos = 0;
snd_pcm_stream_unlock_irqrestore(substream, flags);
snd_pcm_period_elapsed(substream);
}
if (rate > 23000) {
chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
break;
}
/* fallthru */
case SB_HW_20:
chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
break;
case SB_HW_10:
chip->playback_format = SB_DSP_OUTPUT;
break;
default:
return -EINVAL;
}
size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
spin_lock_irqsave(&chip->reg_lock, flags);
snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
if (runtime->channels > 1) {
/* set playback stereo mode */
spin_lock(&chip->mixer_lock);
mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
spin_unlock(&chip->mixer_lock);
/* Soundblaster hardware programming reference guide, 3-23 */
snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
runtime->dma_area[0] = 0x80;
snd_dma_program(chip->dma8, runtime->dma_addr, 1, DMA_MODE_WRITE);
/* force interrupt */
chip->mode = SB_MODE_HALT;
static void pcm_afe_process_rx_pkt(uint32_t opcode,
uint32_t token, uint32_t *payload,
void *priv)
{
struct pcm_afe_info *prtd = priv;
unsigned long dsp_flags;
struct snd_pcm_substream *substream = NULL;
struct snd_pcm_runtime *runtime = NULL;
uint16_t event;
uint64_t period_bytes;
uint64_t bytes_one_sec;
if (prtd == NULL)
return;
substream = prtd->substream;
runtime = substream->runtime;
pr_debug("%s\n", __func__);
spin_lock_irqsave(&prtd->dsp_lock, dsp_flags);
switch (opcode) {
case AFE_EVENT_RT_PROXY_PORT_STATUS: {
event = (uint16_t)((0xFFFF0000 & payload[0]) >> 0x10);
switch (event) {
case AFE_EVENT_RTPORT_START: {
prtd->dsp_cnt = 0;
/* Calculate poll time. Split steps to avoid overflow.
* Poll time-time corresponding to one period in bytes.
* (Samplerate * channelcount * format)=bytes in 1 sec.
* Poll time = (period bytes / bytes in one sec) *
* 1000000 micro seconds.
* Multiplication by 1000000 is done in two steps to
* keep the accuracy of poll time.
*/
period_bytes = ((uint64_t)(
(snd_pcm_lib_period_bytes(prtd->substream)) *
1000));
bytes_one_sec = (runtime->rate * runtime->channels * 2);
bytes_one_sec = div_u64(bytes_one_sec , 1000);
prtd->poll_time =
div_u64(period_bytes, bytes_one_sec);
pr_debug("prtd->poll_time : %d\n", prtd->poll_time);
break;
}
case AFE_EVENT_RTPORT_STOP:
pr_debug("%s: event!=0\n", __func__);
prtd->start = 0;
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
break;
case AFE_EVENT_RTPORT_LOW_WM:
pr_debug("%s: Underrun\n", __func__);
break;
case AFE_EVENT_RTPORT_HI_WM:
pr_debug("%s: Overrun\n", __func__);
break;
default:
break;
}
break;
}
case APR_BASIC_RSP_RESULT: {
switch (payload[0]) {
case AFE_PORT_DATA_CMD_RT_PROXY_PORT_READ_V2:
pr_debug("Read done\n");
prtd->pcm_irq_pos += snd_pcm_lib_period_bytes
(prtd->substream);
snd_pcm_period_elapsed(prtd->substream);
break;
default:
break;
}
break;
}
default:
break;
}
spin_unlock_irqrestore(&prtd->dsp_lock, dsp_flags);
}
static void pcm_afe_process_rx_pkt(uint32_t opcode,
uint32_t token, uint32_t *payload,
void *priv)
{
struct pcm_afe_info *prtd = priv;
unsigned long dsp_flags;
struct snd_pcm_substream *substream = NULL;
struct snd_pcm_runtime *runtime = NULL;
uint16_t event;
if (prtd == NULL)
return;
substream = prtd->substream;
runtime = substream->runtime;
pr_debug("%s\n", __func__);
spin_lock_irqsave(&prtd->dsp_lock, dsp_flags);
switch (opcode) {
case AFE_EVENT_RT_PROXY_PORT_STATUS: {
event = (uint16_t)((0xFFFF0000 & payload[0]) >> 0x10);
switch (event) {
case AFE_EVENT_RTPORT_START: {
prtd->dsp_cnt = 0;
prtd->poll_time = ((unsigned long)((
snd_pcm_lib_period_bytes(prtd->substream)
* 1000 * 1000)/(runtime->rate
* runtime->channels * 2)));
pr_debug("prtd->poll_time : %d", prtd->poll_time);
break;
}
case AFE_EVENT_RTPORT_STOP:
pr_debug("%s: event!=0\n", __func__);
prtd->start = 0;
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
break;
case AFE_EVENT_RTPORT_LOW_WM:
pr_debug("%s: Underrun\n", __func__);
break;
case AFE_EVENT_RTPORT_HI_WM:
pr_debug("%s: Overrun\n", __func__);
break;
default:
break;
}
break;
}
case APR_BASIC_RSP_RESULT: {
switch (payload[0]) {
case AFE_SERVICE_CMD_RTPORT_RD:
pr_debug("Read done\n");
prtd->pcm_irq_pos += snd_pcm_lib_period_bytes
(prtd->substream);
snd_pcm_period_elapsed(prtd->substream);
break;
default:
break;
}
break;
}
default:
break;
}
spin_unlock_irqrestore(&prtd->dsp_lock, dsp_flags);
}
static int omap_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
struct omap_pcm_dma_data *dma_data = prtd->dma_data;
struct omap_dma_channel_params dma_params;
int bytes;
/* return if this is a bufferless transfer e.g.
* codec <--> BT codec or GSM modem -- lg FIXME */
if (!prtd->dma_data)
return 0;
memset(&dma_params, 0, sizeof(dma_params));
dma_params.data_type = dma_data->data_type;
dma_params.trigger = dma_data->dma_req;
dma_params.sync_mode = dma_data->sync_mode;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dma_params.src_amode = OMAP_DMA_AMODE_POST_INC;
dma_params.dst_amode = OMAP_DMA_AMODE_CONSTANT;
dma_params.src_or_dst_synch = OMAP_DMA_DST_SYNC;
dma_params.src_start = runtime->dma_addr;
dma_params.dst_start = dma_data->port_addr;
dma_params.dst_port = OMAP_DMA_PORT_MPUI;
dma_params.dst_fi = dma_data->packet_size;
} else {
dma_params.src_amode = OMAP_DMA_AMODE_CONSTANT;
dma_params.dst_amode = OMAP_DMA_AMODE_POST_INC;
dma_params.src_or_dst_synch = OMAP_DMA_SRC_SYNC;
dma_params.src_start = dma_data->port_addr;
dma_params.dst_start = runtime->dma_addr;
dma_params.src_port = OMAP_DMA_PORT_MPUI;
dma_params.src_fi = dma_data->packet_size;
}
/*
* Set DMA transfer frame size equal to ALSA period size and frame
* count as no. of ALSA periods. Then with DMA frame interrupt enabled,
* we can transfer the whole ALSA buffer with single DMA transfer but
* still can get an interrupt at each period bounary
*/
bytes = snd_pcm_lib_period_bytes(substream);
dma_params.elem_count = bytes >> dma_data->data_type;
dma_params.frame_count = runtime->periods;
omap_set_dma_params(prtd->dma_ch, &dma_params);
if ((cpu_is_omap1510()))
omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ |
OMAP_DMA_LAST_IRQ | OMAP_DMA_BLOCK_IRQ);
else if (!substream->runtime->no_period_wakeup)
omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ);
else {
/*
* No period wakeup:
* we need to disable BLOCK_IRQ, which is enabled by the omap
* dma core at request dma time.
*/
omap_disable_dma_irq(prtd->dma_ch, OMAP_DMA_BLOCK_IRQ);
}
if (!(cpu_class_is_omap1())) {
omap_set_dma_src_burst_mode(prtd->dma_ch,
OMAP_DMA_DATA_BURST_16);
omap_set_dma_dest_burst_mode(prtd->dma_ch,
OMAP_DMA_DATA_BURST_16);
}
return 0;
}
/*
* Not used with ping/pong
*/
static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
int link = prtd->asp_link[0];
unsigned int period_size;
unsigned int dma_offset;
dma_addr_t dma_pos;
dma_addr_t src, dst;
unsigned short src_bidx, dst_bidx;
unsigned short src_cidx, dst_cidx;
unsigned int data_type;
unsigned short acnt;
unsigned int count;
unsigned int fifo_level;
period_size = snd_pcm_lib_period_bytes(substream);
dma_offset = prtd->period * period_size;
dma_pos = runtime->dma_addr + dma_offset;
fifo_level = prtd->params->fifo_level;
pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
"dma_ptr = %x period_size=%x\n", link, dma_pos, period_size);
data_type = prtd->params->data_type;
count = period_size / data_type;
if (fifo_level)
count /= fifo_level;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
src = dma_pos;
dst = prtd->params->dma_addr;
src_bidx = data_type;
dst_bidx = 0;
src_cidx = data_type * fifo_level;
dst_cidx = 0;
} else {
src = prtd->params->dma_addr;
dst = dma_pos;
src_bidx = 0;
dst_bidx = data_type;
src_cidx = 0;
dst_cidx = data_type * fifo_level;
}
acnt = prtd->params->acnt;
edma_set_src(link, src, INCR, W8BIT);
edma_set_dest(link, dst, INCR, W8BIT);
edma_set_src_index(link, src_bidx, src_cidx);
edma_set_dest_index(link, dst_bidx, dst_cidx);
if (!fifo_level)
edma_set_transfer_params(link, acnt, count, 1, 0, ASYNC);
else
edma_set_transfer_params(link, acnt, fifo_level, count,
fifo_level, ABSYNC);
prtd->period++;
if (unlikely(prtd->period >= runtime->periods))
prtd->period = 0;
}
static irqreturn_t
socle_snd_isr(int irq_no, struct snd_soc_dai *soc_dai)
{
u32 int_stat;
u32 *buf;
struct snd_dma_buffer *dma_buffer;
int_stat = socle_i2s_reg_read(SOCLE_I2S_ISR);
//printk("Entered %s int_stat 0x%08X\n", __func__, int_stat);
/* Check wether is is the rx fifo overrun interrupt*/
if (int_stat & SOCLE_I2S_RX_FIFO_OVR_INT) {
printk("rx overrun\n");
/* Clear the rx fifo */
socle_i2s_reg_write(
socle_i2s_reg_read(SOCLE_I2S_RXCTL) |
SOCLE_I2S_RX_FIFO_CLR,SOCLE_I2S_RXCTL);
/* Disable the interrupt */
socle_i2s_reg_write(
socle_i2s_reg_read(SOCLE_I2S_IER) &
~(SOCLE_I2S_RX_FIFO_TRIG_INT_EN |
SOCLE_I2S_RX_FIFO_OVR_INT_EN),SOCLE_I2S_IER);
/* Stop the rx transmission */
socle_i2s_reg_write(
socle_i2s_conf |
(socle_i2s_reg_read(SOCLE_I2S_OPR) & SOCLE_I2S_TX_OP_STR),SOCLE_I2S_OPR);
goto out;
}
/* Check whether it is the tx fifo data trigger interrupt */
if (int_stat & SOCLE_I2S_TX_FIFO_TRIG_INT) {
//printk("%s: playback_substream %x\n", __func__, (u32)playback_substream);
dma_buffer = &(playback_substream->dma_buffer);
#if 0
while ((socle_i2s_reg_read(SOCLE_I2S_FIFOSTS) & SOCLE_I2S_TX_FIFO_FULL) != SOCLE_I2S_TX_FIFO_FULL) {
buf = (u32 *) &(dma_buffer->area[playback_buf_pos]);
socle_i2s_reg_write( *buf, SOCLE_I2S_TXR);
playback_buf_pos += 4;
playback_buf_period_pos +=4;
}
playback_buf_pos %= dma_buffer->bytes;
if( playback_buf_period_pos > playback_substream->runtime->period_size) {
//printk("period_size 0x%08X, buf_size 0x%08X\n",(u32) playback_substream->runtime->period_size, dma_buffer->bytes);
playback_buf_period_pos %= playback_substream->runtime->period_size;
snd_pcm_period_elapsed(playback_substream);
}
#else
//printk("dma_buffer->area %x\n", (u32)dma_buffer->area);
while ((socle_i2s_reg_read(SOCLE_I2S_FIFOSTS) & SOCLE_I2S_TX_FIFO_FULL) != SOCLE_I2S_TX_FIFO_FULL) {
buf = (u32 *) &(dma_buffer->area[playback_buf_pos]);
socle_i2s_reg_write( *buf, SOCLE_I2S_TXR);
playback_buf_pos += 4;
playback_buf_pos %= dma_buffer->bytes;
if( playback_buf_pos % snd_pcm_lib_period_bytes(playback_substream) == 0) {
//printk("%s: playback_buf_pos 0x%08X\n", __func__, playback_buf_pos);
snd_pcm_period_elapsed(playback_substream);
}
}
#endif
}
/* Check whether it is the rx fifo data trigger interrupt */
if (int_stat & SOCLE_I2S_RX_FIFO_TRIG_INT) {
dma_buffer = &(capture_substream->dma_buffer);
while ((socle_i2s_reg_read(SOCLE_I2S_FIFOSTS) & SOCLE_I2S_RX_FIFO_EMPTY) != SOCLE_I2S_RX_FIFO_EMPTY) {
buf = (u32 *) &(dma_buffer->area[capture_buf_pos]);
*buf = socle_i2s_reg_read(SOCLE_I2S_RXR);
capture_buf_pos += 4;
capture_buf_pos %= dma_buffer->bytes;
if( capture_buf_pos % snd_pcm_lib_period_bytes(capture_substream) == 0) {
snd_pcm_period_elapsed(capture_substream);
}
}
}
out:
//printk("Exit %s\n", __func__);
return IRQ_HANDLED;
}
