diff options
Diffstat (limited to 'sound/pci/ctxfi/ctpcm.c')
| -rw-r--r-- | sound/pci/ctxfi/ctpcm.c | 499 |
1 files changed, 499 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctpcm.c b/sound/pci/ctxfi/ctpcm.c new file mode 100644 index 00000000000..73d4fdbbb9f --- /dev/null +++ b/sound/pci/ctxfi/ctpcm.c @@ -0,0 +1,499 @@ +/** + * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. + * + * This source file is released under GPL v2 license (no other versions). + * See the COPYING file included in the main directory of this source + * distribution for the license terms and conditions. + * + * @File ctpcm.c + * + * @Brief + * This file contains the definition of the pcm device functions. + * + * @Author Liu Chun + * @Date Apr 2 2008 + * + */ + +#include "ctpcm.h" +#include <sound/pcm.h> + +/* Hardware descriptions for playback */ +static struct snd_pcm_hardware ct_pcm_playback_hw = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE), + .formats = (SNDRV_PCM_FMTBIT_U8 | + SNDRV_PCM_FMTBIT_S8 | + SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_U16_LE | + SNDRV_PCM_FMTBIT_S24_3LE | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE), + .rates = (SNDRV_PCM_RATE_CONTINUOUS | + SNDRV_PCM_RATE_8000_192000), + .rate_min = 8000, + .rate_max = 192000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = (64), + .period_bytes_max = (128*1024), + .periods_min = 1, + .periods_max = 1024, + .fifo_size = 0, +}; + +static struct snd_pcm_hardware ct_spdif_passthru_playback_hw = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE), + .formats = (SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_U16_LE), + .rates = (SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_32000), + .rate_min = 32000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = (64), + .period_bytes_max = (128*1024), + .periods_min = 1, + .periods_max = 1024, + .fifo_size = 0, +}; + +/* Hardware descriptions for capture */ +static struct snd_pcm_hardware ct_pcm_capture_hw = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = (SNDRV_PCM_FMTBIT_U8 | + SNDRV_PCM_FMTBIT_S8 | + SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_U16_LE | + SNDRV_PCM_FMTBIT_S24_3LE | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE), + .rates = (SNDRV_PCM_RATE_CONTINUOUS | + SNDRV_PCM_RATE_8000_96000), + .rate_min = 8000, + .rate_max = 96000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = (384), + .period_bytes_max = (64*1024), + .periods_min = 2, + .periods_max = 1024, + .fifo_size = 0, +}; + +static void ct_atc_pcm_interrupt(struct ct_atc_pcm *atc_pcm) +{ + struct ct_atc_pcm *apcm = atc_pcm; + + if (NULL == apcm->substream) + return; + + snd_pcm_period_elapsed(apcm->substream); +} + +static void ct_atc_pcm_free_substream(struct snd_pcm_runtime *runtime) +{ + struct ct_atc_pcm *apcm = runtime->private_data; + struct ct_atc *atc = snd_pcm_substream_chip(apcm->substream); + + atc->pcm_release_resources(atc, apcm); + kfree(apcm); + runtime->private_data = NULL; +} + +/* pcm playback operations */ +static int ct_pcm_playback_open(struct snd_pcm_substream *substream) +{ + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm; + int err; + + apcm = kzalloc(sizeof(*apcm), GFP_KERNEL); + if (NULL == apcm) + return -ENOMEM; + + spin_lock_init(&apcm->timer_lock); + apcm->stop_timer = 0; + apcm->substream = substream; + apcm->interrupt = ct_atc_pcm_interrupt; + runtime->private_data = apcm; + runtime->private_free = ct_atc_pcm_free_substream; + if (IEC958 == substream->pcm->device) { + runtime->hw = ct_spdif_passthru_playback_hw; + atc->spdif_out_passthru(atc, 1); + } else { + runtime->hw = ct_pcm_playback_hw; + if (FRONT == substream->pcm->device) + runtime->hw.channels_max = 8; + } + + err = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) { + kfree(apcm); + return err; + } + err = snd_pcm_hw_constraint_minmax(runtime, + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, + 1024, UINT_MAX); + if (err < 0) { + kfree(apcm); + return err; + } + + return 0; +} + +static int ct_pcm_playback_close(struct snd_pcm_substream *substream) +{ + struct ct_atc *atc = snd_pcm_substream_chip(substream); + + /* TODO: Notify mixer inactive. */ + if (IEC958 == substream->pcm->device) + atc->spdif_out_passthru(atc, 0); + + /* The ct_atc_pcm object will be freed by runtime->private_free */ + + return 0; +} + +static int ct_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + return snd_pcm_lib_malloc_pages(substream, + params_buffer_bytes(hw_params)); +} + +static int ct_pcm_hw_free(struct snd_pcm_substream *substream) +{ + /* Free snd-allocated pages */ + return snd_pcm_lib_free_pages(substream); +} + +static void ct_pcm_timer_callback(unsigned long data) +{ + struct ct_atc_pcm *apcm = (struct ct_atc_pcm *)data; + struct snd_pcm_substream *substream = apcm->substream; + struct snd_pcm_runtime *runtime = substream->runtime; + unsigned int period_size = runtime->period_size; + unsigned int buffer_size = runtime->buffer_size; + unsigned long flags; + unsigned int position = 0, dist = 0, interval = 0; + + position = substream->ops->pointer(substream); + dist = (position + buffer_size - apcm->position) % buffer_size; + if ((dist >= period_size) || + (position/period_size != apcm->position/period_size)) { + apcm->interrupt(apcm); + apcm->position = position; + } + /* Add extra HZ*5/1000 to avoid overrun issue when recording + * at 8kHz in 8-bit format or at 88kHz in 24-bit format. */ + interval = ((period_size - (position % period_size)) + * HZ + (runtime->rate - 1)) / runtime->rate + HZ * 5 / 1000; + spin_lock_irqsave(&apcm->timer_lock, flags); + apcm->timer.expires = jiffies + interval; + if (!apcm->stop_timer) + add_timer(&apcm->timer); + + spin_unlock_irqrestore(&apcm->timer_lock, flags); +} + +static int ct_pcm_timer_prepare(struct ct_atc_pcm *apcm) +{ + unsigned long flags; + + spin_lock_irqsave(&apcm->timer_lock, flags); + if (timer_pending(&apcm->timer)) { + /* The timer has already been started. */ + spin_unlock_irqrestore(&apcm->timer_lock, flags); + return 0; + } + + init_timer(&apcm->timer); + apcm->timer.data = (unsigned long)apcm; + apcm->timer.function = ct_pcm_timer_callback; + spin_unlock_irqrestore(&apcm->timer_lock, flags); + apcm->position = 0; + + return 0; +} + +static int ct_pcm_timer_start(struct ct_atc_pcm *apcm) +{ + struct snd_pcm_runtime *runtime = apcm->substream->runtime; + unsigned long flags; + + spin_lock_irqsave(&apcm->timer_lock, flags); + if (timer_pending(&apcm->timer)) { + /* The timer has already been started. */ + spin_unlock_irqrestore(&apcm->timer_lock, flags); + return 0; + } + + apcm->timer.expires = jiffies + (runtime->period_size * HZ + + (runtime->rate - 1)) / runtime->rate; + apcm->stop_timer = 0; + add_timer(&apcm->timer); + spin_unlock_irqrestore(&apcm->timer_lock, flags); + + return 0; +} + +static int ct_pcm_timer_stop(struct ct_atc_pcm *apcm) +{ + unsigned long flags; + + spin_lock_irqsave(&apcm->timer_lock, flags); + apcm->stop_timer = 1; + del_timer(&apcm->timer); + spin_unlock_irqrestore(&apcm->timer_lock, flags); + + try_to_del_timer_sync(&apcm->timer); + + return 0; +} + +static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream) +{ + int err; + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm = runtime->private_data; + + if (IEC958 == substream->pcm->device) + err = atc->spdif_passthru_playback_prepare(atc, apcm); + else + err = atc->pcm_playback_prepare(atc, apcm); + + if (err < 0) { + printk(KERN_ERR "Preparing pcm playback failed!!!\n"); + return err; + } + + ct_pcm_timer_prepare(apcm); + + return 0; +} + +static int +ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm = runtime->private_data; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + atc->pcm_playback_start(atc, apcm); + ct_pcm_timer_start(apcm); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + ct_pcm_timer_stop(apcm); + atc->pcm_playback_stop(atc, apcm); + break; + default: + break; + } + + return 0; +} + +static snd_pcm_uframes_t +ct_pcm_playback_pointer(struct snd_pcm_substream *substream) +{ + unsigned long position; + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm = runtime->private_data; + + /* Read out playback position */ + position = atc->pcm_playback_position(atc, apcm); + position = bytes_to_frames(runtime, position); + return position; +} + +/* pcm capture operations */ +static int ct_pcm_capture_open(struct snd_pcm_substream *substream) +{ + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm; + int err; + + apcm = kzalloc(sizeof(*apcm), GFP_KERNEL); + if (NULL == apcm) + return -ENOMEM; + + spin_lock_init(&apcm->timer_lock); + apcm->started = 0; + apcm->stop_timer = 0; + apcm->substream = substream; + apcm->interrupt = ct_atc_pcm_interrupt; + runtime->private_data = apcm; + runtime->private_free = ct_atc_pcm_free_substream; + runtime->hw = ct_pcm_capture_hw; + runtime->hw.rate_max = atc->rsr * atc->msr; + + err = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) { + kfree(apcm); + return err; + } + err = snd_pcm_hw_constraint_minmax(runtime, + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, + 1024, UINT_MAX); + if (err < 0) { + kfree(apcm); + return err; + } + + return 0; +} + +static int ct_pcm_capture_close(struct snd_pcm_substream *substream) +{ + /* The ct_atc_pcm object will be freed by runtime->private_free */ + /* TODO: Notify mixer inactive. */ + return 0; +} + +static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream) +{ + int err; + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm = runtime->private_data; + + err = atc->pcm_capture_prepare(atc, apcm); + if (err < 0) { + printk(KERN_ERR "Preparing pcm capture failed!!!\n"); + return err; + } + + ct_pcm_timer_prepare(apcm); + + return 0; +} + +static int +ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm = runtime->private_data; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + atc->pcm_capture_start(atc, apcm); + ct_pcm_timer_start(apcm); + break; + case SNDRV_PCM_TRIGGER_STOP: + ct_pcm_timer_stop(apcm); + atc->pcm_capture_stop(atc, apcm); + break; + default: + ct_pcm_timer_stop(apcm); + atc->pcm_capture_stop(atc, apcm); + break; + } + + return 0; +} + +static snd_pcm_uframes_t +ct_pcm_capture_pointer(struct snd_pcm_substream *substream) +{ + unsigned long position; + struct ct_atc *atc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct ct_atc_pcm *apcm = runtime->private_data; + + /* Read out playback position */ + position = atc->pcm_capture_position(atc, apcm); + position = bytes_to_frames(runtime, position); + return position; +} + +/* PCM operators for playback */ +static struct snd_pcm_ops ct_pcm_playback_ops = { + .open = ct_pcm_playback_open, + .close = ct_pcm_playback_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = ct_pcm_hw_params, + .hw_free = ct_pcm_hw_free, + .prepare = ct_pcm_playback_prepare, + .trigger = ct_pcm_playback_trigger, + .pointer = ct_pcm_playback_pointer, +}; + +/* PCM operators for capture */ +static struct snd_pcm_ops ct_pcm_capture_ops = { + .open = ct_pcm_capture_open, + .close = ct_pcm_capture_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = ct_pcm_hw_params, + .hw_free = ct_pcm_hw_free, + .prepare = ct_pcm_capture_prepare, + .trigger = ct_pcm_capture_trigger, + .pointer = ct_pcm_capture_pointer, +}; + +/* Create ALSA pcm device */ +int ct_alsa_pcm_create(struct ct_atc *atc, + enum CTALSADEVS device, + const char *device_name) +{ + struct snd_pcm *pcm; + int err; + int playback_count, capture_count; + char name[128]; + + strncpy(name, device_name, sizeof(name)); + playback_count = (IEC958 == device) ? 1 : 8; + capture_count = (FRONT == device) ? 1 : 0; + err = snd_pcm_new(atc->card, name, device, + playback_count, capture_count, &pcm); + if (err < 0) { + printk(KERN_ERR "snd_pcm_new failed!! Err=%d\n", err); + return err; + } + + pcm->private_data = atc; + pcm->info_flags = 0; + pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX; + strcpy(pcm->name, device_name); + + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops); + + if (FRONT == device) + snd_pcm_set_ops(pcm, + SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops); + + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, + snd_dma_pci_data(atc->pci), 128*1024, 128*1024); + + return 0; +} |