| /* |
| * Digital Audio (PCM) abstract layer |
| * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| * |
| * |
| * 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 <sound/driver.h> |
| #include <linux/mm.h> |
| #include <linux/smp_lock.h> |
| #include <linux/file.h> |
| #include <linux/slab.h> |
| #include <linux/time.h> |
| #include <linux/uio.h> |
| #include <sound/core.h> |
| #include <sound/control.h> |
| #include <sound/info.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/timer.h> |
| #include <sound/minors.h> |
| #include <asm/io.h> |
| |
| /* |
| * Compatibility |
| */ |
| |
| struct sndrv_pcm_hw_params_old { |
| unsigned int flags; |
| unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - |
| SNDRV_PCM_HW_PARAM_ACCESS + 1]; |
| struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
| SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
| unsigned int rmask; |
| unsigned int cmask; |
| unsigned int info; |
| unsigned int msbits; |
| unsigned int rate_num; |
| unsigned int rate_den; |
| sndrv_pcm_uframes_t fifo_size; |
| unsigned char reserved[64]; |
| }; |
| |
| #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct sndrv_pcm_hw_params_old) |
| #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct sndrv_pcm_hw_params_old) |
| |
| static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams); |
| static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams); |
| |
| /* |
| * |
| */ |
| |
| DEFINE_RWLOCK(snd_pcm_link_rwlock); |
| static DECLARE_RWSEM(snd_pcm_link_rwsem); |
| |
| |
| static inline mm_segment_t snd_enter_user(void) |
| { |
| mm_segment_t fs = get_fs(); |
| set_fs(get_ds()); |
| return fs; |
| } |
| |
| static inline void snd_leave_user(mm_segment_t fs) |
| { |
| set_fs(fs); |
| } |
| |
| |
| |
| int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info) |
| { |
| snd_pcm_runtime_t * runtime; |
| snd_pcm_t *pcm = substream->pcm; |
| snd_pcm_str_t *pstr = substream->pstr; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| memset(info, 0, sizeof(*info)); |
| info->card = pcm->card->number; |
| info->device = pcm->device; |
| info->stream = substream->stream; |
| info->subdevice = substream->number; |
| strlcpy(info->id, pcm->id, sizeof(info->id)); |
| strlcpy(info->name, pcm->name, sizeof(info->name)); |
| info->dev_class = pcm->dev_class; |
| info->dev_subclass = pcm->dev_subclass; |
| info->subdevices_count = pstr->substream_count; |
| info->subdevices_avail = pstr->substream_count - pstr->substream_opened; |
| strlcpy(info->subname, substream->name, sizeof(info->subname)); |
| runtime = substream->runtime; |
| /* AB: FIXME!!! This is definitely nonsense */ |
| if (runtime) { |
| info->sync = runtime->sync; |
| substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); |
| } |
| return 0; |
| } |
| |
| int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user * _info) |
| { |
| snd_pcm_info_t *info; |
| int err; |
| |
| info = kmalloc(sizeof(*info), GFP_KERNEL); |
| if (! info) |
| return -ENOMEM; |
| err = snd_pcm_info(substream, info); |
| if (err >= 0) { |
| if (copy_to_user(_info, info, sizeof(*info))) |
| err = -EFAULT; |
| } |
| kfree(info); |
| return err; |
| } |
| |
| #undef RULES_DEBUG |
| |
| #ifdef RULES_DEBUG |
| #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v |
| char *snd_pcm_hw_param_names[] = { |
| HW_PARAM(ACCESS), |
| HW_PARAM(FORMAT), |
| HW_PARAM(SUBFORMAT), |
| HW_PARAM(SAMPLE_BITS), |
| HW_PARAM(FRAME_BITS), |
| HW_PARAM(CHANNELS), |
| HW_PARAM(RATE), |
| HW_PARAM(PERIOD_TIME), |
| HW_PARAM(PERIOD_SIZE), |
| HW_PARAM(PERIOD_BYTES), |
| HW_PARAM(PERIODS), |
| HW_PARAM(BUFFER_TIME), |
| HW_PARAM(BUFFER_SIZE), |
| HW_PARAM(BUFFER_BYTES), |
| HW_PARAM(TICK_TIME), |
| }; |
| #endif |
| |
| int snd_pcm_hw_refine(snd_pcm_substream_t *substream, |
| snd_pcm_hw_params_t *params) |
| { |
| unsigned int k; |
| snd_pcm_hardware_t *hw; |
| snd_interval_t *i = NULL; |
| snd_mask_t *m = NULL; |
| snd_pcm_hw_constraints_t *constrs = &substream->runtime->hw_constraints; |
| unsigned int rstamps[constrs->rules_num]; |
| unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; |
| unsigned int stamp = 2; |
| int changed, again; |
| |
| params->info = 0; |
| params->fifo_size = 0; |
| if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) |
| params->msbits = 0; |
| if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { |
| params->rate_num = 0; |
| params->rate_den = 0; |
| } |
| |
| for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { |
| m = hw_param_mask(params, k); |
| if (snd_mask_empty(m)) |
| return -EINVAL; |
| if (!(params->rmask & (1 << k))) |
| continue; |
| #ifdef RULES_DEBUG |
| printk("%s = ", snd_pcm_hw_param_names[k]); |
| printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
| #endif |
| changed = snd_mask_refine(m, constrs_mask(constrs, k)); |
| #ifdef RULES_DEBUG |
| printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
| #endif |
| if (changed) |
| params->cmask |= 1 << k; |
| if (changed < 0) |
| return changed; |
| } |
| |
| for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { |
| i = hw_param_interval(params, k); |
| if (snd_interval_empty(i)) |
| return -EINVAL; |
| if (!(params->rmask & (1 << k))) |
| continue; |
| #ifdef RULES_DEBUG |
| printk("%s = ", snd_pcm_hw_param_names[k]); |
| if (i->empty) |
| printk("empty"); |
| else |
| printk("%c%u %u%c", |
| i->openmin ? '(' : '[', i->min, |
| i->max, i->openmax ? ')' : ']'); |
| printk(" -> "); |
| #endif |
| changed = snd_interval_refine(i, constrs_interval(constrs, k)); |
| #ifdef RULES_DEBUG |
| if (i->empty) |
| printk("empty\n"); |
| else |
| printk("%c%u %u%c\n", |
| i->openmin ? '(' : '[', i->min, |
| i->max, i->openmax ? ')' : ']'); |
| #endif |
| if (changed) |
| params->cmask |= 1 << k; |
| if (changed < 0) |
| return changed; |
| } |
| |
| for (k = 0; k < constrs->rules_num; k++) |
| rstamps[k] = 0; |
| for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
| vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; |
| do { |
| again = 0; |
| for (k = 0; k < constrs->rules_num; k++) { |
| snd_pcm_hw_rule_t *r = &constrs->rules[k]; |
| unsigned int d; |
| int doit = 0; |
| if (r->cond && !(r->cond & params->flags)) |
| continue; |
| for (d = 0; r->deps[d] >= 0; d++) { |
| if (vstamps[r->deps[d]] > rstamps[k]) { |
| doit = 1; |
| break; |
| } |
| } |
| if (!doit) |
| continue; |
| #ifdef RULES_DEBUG |
| printk("Rule %d [%p]: ", k, r->func); |
| if (r->var >= 0) { |
| printk("%s = ", snd_pcm_hw_param_names[r->var]); |
| if (hw_is_mask(r->var)) { |
| m = hw_param_mask(params, r->var); |
| printk("%x", *m->bits); |
| } else { |
| i = hw_param_interval(params, r->var); |
| if (i->empty) |
| printk("empty"); |
| else |
| printk("%c%u %u%c", |
| i->openmin ? '(' : '[', i->min, |
| i->max, i->openmax ? ')' : ']'); |
| } |
| } |
| #endif |
| changed = r->func(params, r); |
| #ifdef RULES_DEBUG |
| if (r->var >= 0) { |
| printk(" -> "); |
| if (hw_is_mask(r->var)) |
| printk("%x", *m->bits); |
| else { |
| if (i->empty) |
| printk("empty"); |
| else |
| printk("%c%u %u%c", |
| i->openmin ? '(' : '[', i->min, |
| i->max, i->openmax ? ')' : ']'); |
| } |
| } |
| printk("\n"); |
| #endif |
| rstamps[k] = stamp; |
| if (changed && r->var >= 0) { |
| params->cmask |= (1 << r->var); |
| vstamps[r->var] = stamp; |
| again = 1; |
| } |
| if (changed < 0) |
| return changed; |
| stamp++; |
| } |
| } while (again); |
| if (!params->msbits) { |
| i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
| if (snd_interval_single(i)) |
| params->msbits = snd_interval_value(i); |
| } |
| |
| if (!params->rate_den) { |
| i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| if (snd_interval_single(i)) { |
| params->rate_num = snd_interval_value(i); |
| params->rate_den = 1; |
| } |
| } |
| |
| hw = &substream->runtime->hw; |
| if (!params->info) |
| params->info = hw->info; |
| if (!params->fifo_size) |
| params->fifo_size = hw->fifo_size; |
| params->rmask = 0; |
| return 0; |
| } |
| |
| static int snd_pcm_hw_refine_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params) |
| { |
| snd_pcm_hw_params_t *params; |
| int err; |
| |
| params = kmalloc(sizeof(*params), GFP_KERNEL); |
| if (!params) { |
| err = -ENOMEM; |
| goto out; |
| } |
| if (copy_from_user(params, _params, sizeof(*params))) { |
| err = -EFAULT; |
| goto out; |
| } |
| err = snd_pcm_hw_refine(substream, params); |
| if (copy_to_user(_params, params, sizeof(*params))) { |
| if (!err) |
| err = -EFAULT; |
| } |
| out: |
| kfree(params); |
| return err; |
| } |
| |
| static int snd_pcm_hw_params(snd_pcm_substream_t *substream, |
| snd_pcm_hw_params_t *params) |
| { |
| snd_pcm_runtime_t *runtime; |
| int err; |
| unsigned int bits; |
| snd_pcm_uframes_t frames; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| snd_assert(runtime != NULL, return -ENXIO); |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_OPEN: |
| case SNDRV_PCM_STATE_SETUP: |
| case SNDRV_PCM_STATE_PREPARED: |
| break; |
| default: |
| snd_pcm_stream_unlock_irq(substream); |
| return -EBADFD; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| if (!substream->oss.oss) |
| #endif |
| if (atomic_read(&runtime->mmap_count)) |
| return -EBADFD; |
| |
| params->rmask = ~0U; |
| err = snd_pcm_hw_refine(substream, params); |
| if (err < 0) |
| goto _error; |
| |
| err = snd_pcm_hw_params_choose(substream, params); |
| if (err < 0) |
| goto _error; |
| |
| if (substream->ops->hw_params != NULL) { |
| err = substream->ops->hw_params(substream, params); |
| if (err < 0) |
| goto _error; |
| } |
| |
| runtime->access = params_access(params); |
| runtime->format = params_format(params); |
| runtime->subformat = params_subformat(params); |
| runtime->channels = params_channels(params); |
| runtime->rate = params_rate(params); |
| runtime->period_size = params_period_size(params); |
| runtime->periods = params_periods(params); |
| runtime->buffer_size = params_buffer_size(params); |
| runtime->tick_time = params_tick_time(params); |
| runtime->info = params->info; |
| runtime->rate_num = params->rate_num; |
| runtime->rate_den = params->rate_den; |
| |
| bits = snd_pcm_format_physical_width(runtime->format); |
| runtime->sample_bits = bits; |
| bits *= runtime->channels; |
| runtime->frame_bits = bits; |
| frames = 1; |
| while (bits % 8 != 0) { |
| bits *= 2; |
| frames *= 2; |
| } |
| runtime->byte_align = bits / 8; |
| runtime->min_align = frames; |
| |
| /* Default sw params */ |
| runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; |
| runtime->period_step = 1; |
| runtime->sleep_min = 0; |
| runtime->control->avail_min = runtime->period_size; |
| runtime->xfer_align = runtime->period_size; |
| runtime->start_threshold = 1; |
| runtime->stop_threshold = runtime->buffer_size; |
| runtime->silence_threshold = 0; |
| runtime->silence_size = 0; |
| runtime->boundary = runtime->buffer_size; |
| while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) |
| runtime->boundary *= 2; |
| |
| snd_pcm_timer_resolution_change(substream); |
| runtime->status->state = SNDRV_PCM_STATE_SETUP; |
| return 0; |
| _error: |
| /* hardware might be unuseable from this time, |
| so we force application to retry to set |
| the correct hardware parameter settings */ |
| runtime->status->state = SNDRV_PCM_STATE_OPEN; |
| if (substream->ops->hw_free != NULL) |
| substream->ops->hw_free(substream); |
| return err; |
| } |
| |
| static int snd_pcm_hw_params_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params) |
| { |
| snd_pcm_hw_params_t *params; |
| int err; |
| |
| params = kmalloc(sizeof(*params), GFP_KERNEL); |
| if (!params) { |
| err = -ENOMEM; |
| goto out; |
| } |
| if (copy_from_user(params, _params, sizeof(*params))) { |
| err = -EFAULT; |
| goto out; |
| } |
| err = snd_pcm_hw_params(substream, params); |
| if (copy_to_user(_params, params, sizeof(*params))) { |
| if (!err) |
| err = -EFAULT; |
| } |
| out: |
| kfree(params); |
| return err; |
| } |
| |
| static int snd_pcm_hw_free(snd_pcm_substream_t * substream) |
| { |
| snd_pcm_runtime_t *runtime; |
| int result = 0; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| snd_assert(runtime != NULL, return -ENXIO); |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_SETUP: |
| case SNDRV_PCM_STATE_PREPARED: |
| break; |
| default: |
| snd_pcm_stream_unlock_irq(substream); |
| return -EBADFD; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| if (atomic_read(&runtime->mmap_count)) |
| return -EBADFD; |
| if (substream->ops->hw_free) |
| result = substream->ops->hw_free(substream); |
| runtime->status->state = SNDRV_PCM_STATE_OPEN; |
| return result; |
| } |
| |
| static int snd_pcm_sw_params(snd_pcm_substream_t * substream, snd_pcm_sw_params_t *params) |
| { |
| snd_pcm_runtime_t *runtime; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| snd_assert(runtime != NULL, return -ENXIO); |
| snd_pcm_stream_lock_irq(substream); |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| snd_pcm_stream_unlock_irq(substream); |
| return -EBADFD; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| |
| if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) |
| return -EINVAL; |
| if (params->avail_min == 0) |
| return -EINVAL; |
| if (params->xfer_align == 0 || |
| params->xfer_align % runtime->min_align != 0) |
| return -EINVAL; |
| if (params->silence_size >= runtime->boundary) { |
| if (params->silence_threshold != 0) |
| return -EINVAL; |
| } else { |
| if (params->silence_size > params->silence_threshold) |
| return -EINVAL; |
| if (params->silence_threshold > runtime->buffer_size) |
| return -EINVAL; |
| } |
| snd_pcm_stream_lock_irq(substream); |
| runtime->tstamp_mode = params->tstamp_mode; |
| runtime->sleep_min = params->sleep_min; |
| runtime->period_step = params->period_step; |
| runtime->control->avail_min = params->avail_min; |
| runtime->start_threshold = params->start_threshold; |
| runtime->stop_threshold = params->stop_threshold; |
| runtime->silence_threshold = params->silence_threshold; |
| runtime->silence_size = params->silence_size; |
| runtime->xfer_align = params->xfer_align; |
| params->boundary = runtime->boundary; |
| if (snd_pcm_running(substream)) { |
| if (runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| else |
| snd_pcm_tick_set(substream, 0); |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| runtime->silence_size > 0) |
| snd_pcm_playback_silence(substream, ULONG_MAX); |
| wake_up(&runtime->sleep); |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| return 0; |
| } |
| |
| static int snd_pcm_sw_params_user(snd_pcm_substream_t * substream, snd_pcm_sw_params_t __user * _params) |
| { |
| snd_pcm_sw_params_t params; |
| int err; |
| if (copy_from_user(¶ms, _params, sizeof(params))) |
| return -EFAULT; |
| err = snd_pcm_sw_params(substream, ¶ms); |
| if (copy_to_user(_params, ¶ms, sizeof(params))) |
| return -EFAULT; |
| return err; |
| } |
| |
| int snd_pcm_status(snd_pcm_substream_t *substream, |
| snd_pcm_status_t *status) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| |
| snd_pcm_stream_lock_irq(substream); |
| status->state = runtime->status->state; |
| status->suspended_state = runtime->status->suspended_state; |
| if (status->state == SNDRV_PCM_STATE_OPEN) |
| goto _end; |
| status->trigger_tstamp = runtime->trigger_tstamp; |
| if (snd_pcm_running(substream)) { |
| snd_pcm_update_hw_ptr(substream); |
| if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) |
| status->tstamp = runtime->status->tstamp; |
| else |
| snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec); |
| } else |
| snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec); |
| status->appl_ptr = runtime->control->appl_ptr; |
| status->hw_ptr = runtime->status->hw_ptr; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| status->avail = snd_pcm_playback_avail(runtime); |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || |
| runtime->status->state == SNDRV_PCM_STATE_DRAINING) |
| status->delay = runtime->buffer_size - status->avail; |
| else |
| status->delay = 0; |
| } else { |
| status->avail = snd_pcm_capture_avail(runtime); |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
| status->delay = status->avail; |
| else |
| status->delay = 0; |
| } |
| status->avail_max = runtime->avail_max; |
| status->overrange = runtime->overrange; |
| runtime->avail_max = 0; |
| runtime->overrange = 0; |
| _end: |
| snd_pcm_stream_unlock_irq(substream); |
| return 0; |
| } |
| |
| static int snd_pcm_status_user(snd_pcm_substream_t * substream, snd_pcm_status_t __user * _status) |
| { |
| snd_pcm_status_t status; |
| snd_pcm_runtime_t *runtime; |
| int res; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| memset(&status, 0, sizeof(status)); |
| res = snd_pcm_status(substream, &status); |
| if (res < 0) |
| return res; |
| if (copy_to_user(_status, &status, sizeof(status))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int snd_pcm_channel_info(snd_pcm_substream_t * substream, snd_pcm_channel_info_t * info) |
| { |
| snd_pcm_runtime_t *runtime; |
| unsigned int channel; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| channel = info->channel; |
| runtime = substream->runtime; |
| snd_pcm_stream_lock_irq(substream); |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| snd_pcm_stream_unlock_irq(substream); |
| return -EBADFD; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| if (channel >= runtime->channels) |
| return -EINVAL; |
| memset(info, 0, sizeof(*info)); |
| info->channel = channel; |
| return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); |
| } |
| |
| static int snd_pcm_channel_info_user(snd_pcm_substream_t * substream, snd_pcm_channel_info_t __user * _info) |
| { |
| snd_pcm_channel_info_t info; |
| int res; |
| |
| if (copy_from_user(&info, _info, sizeof(info))) |
| return -EFAULT; |
| res = snd_pcm_channel_info(substream, &info); |
| if (res < 0) |
| return res; |
| if (copy_to_user(_info, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static void snd_pcm_trigger_tstamp(snd_pcm_substream_t *substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->trigger_master == NULL) |
| return; |
| if (runtime->trigger_master == substream) { |
| snd_timestamp_now(&runtime->trigger_tstamp, runtime->tstamp_timespec); |
| } else { |
| snd_pcm_trigger_tstamp(runtime->trigger_master); |
| runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; |
| } |
| runtime->trigger_master = NULL; |
| } |
| |
| struct action_ops { |
| int (*pre_action)(snd_pcm_substream_t *substream, int state); |
| int (*do_action)(snd_pcm_substream_t *substream, int state); |
| void (*undo_action)(snd_pcm_substream_t *substream, int state); |
| void (*post_action)(snd_pcm_substream_t *substream, int state); |
| }; |
| |
| /* |
| * this functions is core for handling of linked stream |
| * Note: the stream state might be changed also on failure |
| * Note2: call with calling stream lock + link lock |
| */ |
| static int snd_pcm_action_group(struct action_ops *ops, |
| snd_pcm_substream_t *substream, |
| int state, int do_lock) |
| { |
| struct list_head *pos; |
| snd_pcm_substream_t *s = NULL; |
| snd_pcm_substream_t *s1; |
| int res = 0; |
| |
| snd_pcm_group_for_each(pos, substream) { |
| s = snd_pcm_group_substream_entry(pos); |
| if (do_lock && s != substream) |
| spin_lock(&s->self_group.lock); |
| res = ops->pre_action(s, state); |
| if (res < 0) |
| goto _unlock; |
| } |
| snd_pcm_group_for_each(pos, substream) { |
| s = snd_pcm_group_substream_entry(pos); |
| res = ops->do_action(s, state); |
| if (res < 0) { |
| if (ops->undo_action) { |
| snd_pcm_group_for_each(pos, substream) { |
| s1 = snd_pcm_group_substream_entry(pos); |
| if (s1 == s) /* failed stream */ |
| break; |
| ops->undo_action(s1, state); |
| } |
| } |
| s = NULL; /* unlock all */ |
| goto _unlock; |
| } |
| } |
| snd_pcm_group_for_each(pos, substream) { |
| s = snd_pcm_group_substream_entry(pos); |
| ops->post_action(s, state); |
| } |
| _unlock: |
| if (do_lock) { |
| /* unlock streams */ |
| snd_pcm_group_for_each(pos, substream) { |
| s1 = snd_pcm_group_substream_entry(pos); |
| if (s1 != substream) |
| spin_unlock(&s1->self_group.lock); |
| if (s1 == s) /* end */ |
| break; |
| } |
| } |
| return res; |
| } |
| |
| /* |
| * Note: call with stream lock |
| */ |
| static int snd_pcm_action_single(struct action_ops *ops, |
| snd_pcm_substream_t *substream, |
| int state) |
| { |
| int res; |
| |
| res = ops->pre_action(substream, state); |
| if (res < 0) |
| return res; |
| res = ops->do_action(substream, state); |
| if (res == 0) |
| ops->post_action(substream, state); |
| else if (ops->undo_action) |
| ops->undo_action(substream, state); |
| return res; |
| } |
| |
| /* |
| * Note: call with stream lock |
| */ |
| static int snd_pcm_action(struct action_ops *ops, |
| snd_pcm_substream_t *substream, |
| int state) |
| { |
| int res; |
| |
| if (snd_pcm_stream_linked(substream)) { |
| if (!spin_trylock(&substream->group->lock)) { |
| spin_unlock(&substream->self_group.lock); |
| spin_lock(&substream->group->lock); |
| spin_lock(&substream->self_group.lock); |
| } |
| res = snd_pcm_action_group(ops, substream, state, 1); |
| spin_unlock(&substream->group->lock); |
| } else { |
| res = snd_pcm_action_single(ops, substream, state); |
| } |
| return res; |
| } |
| |
| /* |
| * Note: don't use any locks before |
| */ |
| static int snd_pcm_action_lock_irq(struct action_ops *ops, |
| snd_pcm_substream_t *substream, |
| int state) |
| { |
| int res; |
| |
| read_lock_irq(&snd_pcm_link_rwlock); |
| if (snd_pcm_stream_linked(substream)) { |
| spin_lock(&substream->group->lock); |
| spin_lock(&substream->self_group.lock); |
| res = snd_pcm_action_group(ops, substream, state, 1); |
| spin_unlock(&substream->self_group.lock); |
| spin_unlock(&substream->group->lock); |
| } else { |
| spin_lock(&substream->self_group.lock); |
| res = snd_pcm_action_single(ops, substream, state); |
| spin_unlock(&substream->self_group.lock); |
| } |
| read_unlock_irq(&snd_pcm_link_rwlock); |
| return res; |
| } |
| |
| /* |
| */ |
| static int snd_pcm_action_nonatomic(struct action_ops *ops, |
| snd_pcm_substream_t *substream, |
| int state) |
| { |
| int res; |
| |
| down_read(&snd_pcm_link_rwsem); |
| if (snd_pcm_stream_linked(substream)) |
| res = snd_pcm_action_group(ops, substream, state, 0); |
| else |
| res = snd_pcm_action_single(ops, substream, state); |
| up_read(&snd_pcm_link_rwsem); |
| return res; |
| } |
| |
| /* |
| * start callbacks |
| */ |
| static int snd_pcm_pre_start(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
| return -EBADFD; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| !snd_pcm_playback_data(substream)) |
| return -EPIPE; |
| runtime->trigger_master = substream; |
| return 0; |
| } |
| |
| static int snd_pcm_do_start(snd_pcm_substream_t *substream, int state) |
| { |
| if (substream->runtime->trigger_master != substream) |
| return 0; |
| return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); |
| } |
| |
| static void snd_pcm_undo_start(snd_pcm_substream_t *substream, int state) |
| { |
| if (substream->runtime->trigger_master == substream) |
| substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); |
| } |
| |
| static void snd_pcm_post_start(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_trigger_tstamp(substream); |
| runtime->status->state = state; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| runtime->silence_size > 0) |
| snd_pcm_playback_silence(substream, ULONG_MAX); |
| if (runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| if (substream->timer) |
| snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, &runtime->trigger_tstamp); |
| } |
| |
| static struct action_ops snd_pcm_action_start = { |
| .pre_action = snd_pcm_pre_start, |
| .do_action = snd_pcm_do_start, |
| .undo_action = snd_pcm_undo_start, |
| .post_action = snd_pcm_post_start |
| }; |
| |
| /** |
| * snd_pcm_start |
| * @substream: the PCM substream instance |
| * |
| * Start all linked streams. |
| */ |
| int snd_pcm_start(snd_pcm_substream_t *substream) |
| { |
| return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); |
| } |
| |
| /* |
| * stop callbacks |
| */ |
| static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| runtime->trigger_master = substream; |
| return 0; |
| } |
| |
| static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state) |
| { |
| if (substream->runtime->trigger_master == substream && |
| snd_pcm_running(substream)) |
| substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); |
| return 0; /* unconditonally stop all substreams */ |
| } |
| |
| static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->status->state != state) { |
| snd_pcm_trigger_tstamp(substream); |
| if (substream->timer) |
| snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp); |
| runtime->status->state = state; |
| snd_pcm_tick_set(substream, 0); |
| } |
| wake_up(&runtime->sleep); |
| } |
| |
| static struct action_ops snd_pcm_action_stop = { |
| .pre_action = snd_pcm_pre_stop, |
| .do_action = snd_pcm_do_stop, |
| .post_action = snd_pcm_post_stop |
| }; |
| |
| /** |
| * snd_pcm_stop |
| * @substream: the PCM substream instance |
| * @state: PCM state after stopping the stream |
| * |
| * Try to stop all running streams in the substream group. |
| * The state of each stream is changed to the given value after that unconditionally. |
| */ |
| int snd_pcm_stop(snd_pcm_substream_t *substream, int state) |
| { |
| return snd_pcm_action(&snd_pcm_action_stop, substream, state); |
| } |
| |
| /** |
| * snd_pcm_drain_done |
| * @substream: the PCM substream |
| * |
| * Stop the DMA only when the given stream is playback. |
| * The state is changed to SETUP. |
| * Unlike snd_pcm_stop(), this affects only the given stream. |
| */ |
| int snd_pcm_drain_done(snd_pcm_substream_t *substream) |
| { |
| return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP); |
| } |
| |
| /* |
| * pause callbacks |
| */ |
| static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
| return -ENOSYS; |
| if (push) { |
| if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) |
| return -EBADFD; |
| } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) |
| return -EBADFD; |
| runtime->trigger_master = substream; |
| return 0; |
| } |
| |
| static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push) |
| { |
| if (substream->runtime->trigger_master != substream) |
| return 0; |
| return substream->ops->trigger(substream, |
| push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : |
| SNDRV_PCM_TRIGGER_PAUSE_RELEASE); |
| } |
| |
| static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push) |
| { |
| if (substream->runtime->trigger_master == substream) |
| substream->ops->trigger(substream, |
| push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : |
| SNDRV_PCM_TRIGGER_PAUSE_PUSH); |
| } |
| |
| static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_trigger_tstamp(substream); |
| if (push) { |
| runtime->status->state = SNDRV_PCM_STATE_PAUSED; |
| if (substream->timer) |
| snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp); |
| snd_pcm_tick_set(substream, 0); |
| wake_up(&runtime->sleep); |
| } else { |
| runtime->status->state = SNDRV_PCM_STATE_RUNNING; |
| if (runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| if (substream->timer) |
| snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp); |
| } |
| } |
| |
| static struct action_ops snd_pcm_action_pause = { |
| .pre_action = snd_pcm_pre_pause, |
| .do_action = snd_pcm_do_pause, |
| .undo_action = snd_pcm_undo_pause, |
| .post_action = snd_pcm_post_pause |
| }; |
| |
| /* |
| * Push/release the pause for all linked streams. |
| */ |
| static int snd_pcm_pause(snd_pcm_substream_t *substream, int push) |
| { |
| return snd_pcm_action(&snd_pcm_action_pause, substream, push); |
| } |
| |
| #ifdef CONFIG_PM |
| /* suspend */ |
| |
| static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
| return -EBUSY; |
| runtime->trigger_master = substream; |
| return 0; |
| } |
| |
| static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->trigger_master != substream) |
| return 0; |
| if (! snd_pcm_running(substream)) |
| return 0; |
| substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); |
| return 0; /* suspend unconditionally */ |
| } |
| |
| static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_trigger_tstamp(substream); |
| if (substream->timer) |
| snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, &runtime->trigger_tstamp); |
| runtime->status->suspended_state = runtime->status->state; |
| runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; |
| snd_pcm_tick_set(substream, 0); |
| wake_up(&runtime->sleep); |
| } |
| |
| static struct action_ops snd_pcm_action_suspend = { |
| .pre_action = snd_pcm_pre_suspend, |
| .do_action = snd_pcm_do_suspend, |
| .post_action = snd_pcm_post_suspend |
| }; |
| |
| /** |
| * snd_pcm_suspend |
| * @substream: the PCM substream |
| * |
| * Trigger SUSPEND to all linked streams. |
| * After this call, all streams are changed to SUSPENDED state. |
| */ |
| int snd_pcm_suspend(snd_pcm_substream_t *substream) |
| { |
| int err; |
| unsigned long flags; |
| |
| snd_pcm_stream_lock_irqsave(substream, flags); |
| err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); |
| snd_pcm_stream_unlock_irqrestore(substream, flags); |
| return err; |
| } |
| |
| /** |
| * snd_pcm_suspend_all |
| * @pcm: the PCM instance |
| * |
| * Trigger SUSPEND to all substreams in the given pcm. |
| * After this call, all streams are changed to SUSPENDED state. |
| */ |
| int snd_pcm_suspend_all(snd_pcm_t *pcm) |
| { |
| snd_pcm_substream_t *substream; |
| int stream, err = 0; |
| |
| for (stream = 0; stream < 2; stream++) { |
| for (substream = pcm->streams[stream].substream; substream; substream = substream->next) { |
| /* FIXME: the open/close code should lock this as well */ |
| if (substream->runtime == NULL) |
| continue; |
| err = snd_pcm_suspend(substream); |
| if (err < 0 && err != -EBUSY) |
| return err; |
| } |
| } |
| return 0; |
| } |
| |
| /* resume */ |
| |
| static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
| return -ENOSYS; |
| runtime->trigger_master = substream; |
| return 0; |
| } |
| |
| static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->trigger_master != substream) |
| return 0; |
| /* DMA not running previously? */ |
| if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && |
| (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || |
| substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) |
| return 0; |
| return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); |
| } |
| |
| static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state) |
| { |
| if (substream->runtime->trigger_master == substream && |
| snd_pcm_running(substream)) |
| substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); |
| } |
| |
| static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_trigger_tstamp(substream); |
| if (substream->timer) |
| snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, &runtime->trigger_tstamp); |
| runtime->status->state = runtime->status->suspended_state; |
| if (runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| } |
| |
| static struct action_ops snd_pcm_action_resume = { |
| .pre_action = snd_pcm_pre_resume, |
| .do_action = snd_pcm_do_resume, |
| .undo_action = snd_pcm_undo_resume, |
| .post_action = snd_pcm_post_resume |
| }; |
| |
| static int snd_pcm_resume(snd_pcm_substream_t *substream) |
| { |
| snd_card_t *card = substream->pcm->card; |
| int res; |
| |
| snd_power_lock(card); |
| if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) |
| res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
| snd_power_unlock(card); |
| return res; |
| } |
| |
| #else |
| |
| static int snd_pcm_resume(snd_pcm_substream_t *substream) |
| { |
| return -ENOSYS; |
| } |
| |
| #endif /* CONFIG_PM */ |
| |
| /* |
| * xrun ioctl |
| * |
| * Change the RUNNING stream(s) to XRUN state. |
| */ |
| static int snd_pcm_xrun(snd_pcm_substream_t *substream) |
| { |
| snd_card_t *card = substream->pcm->card; |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| int result; |
| |
| snd_power_lock(card); |
| if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); |
| if (result < 0) |
| goto _unlock; |
| } |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_XRUN: |
| result = 0; /* already there */ |
| break; |
| case SNDRV_PCM_STATE_RUNNING: |
| result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| break; |
| default: |
| result = -EBADFD; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| _unlock: |
| snd_power_unlock(card); |
| return result; |
| } |
| |
| /* |
| * reset ioctl |
| */ |
| static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_RUNNING: |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_PAUSED: |
| case SNDRV_PCM_STATE_SUSPENDED: |
| return 0; |
| default: |
| return -EBADFD; |
| } |
| } |
| |
| static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
| if (err < 0) |
| return err; |
| // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); |
| runtime->hw_ptr_base = 0; |
| runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size; |
| runtime->silence_start = runtime->status->hw_ptr; |
| runtime->silence_filled = 0; |
| return 0; |
| } |
| |
| static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| runtime->control->appl_ptr = runtime->status->hw_ptr; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| runtime->silence_size > 0) |
| snd_pcm_playback_silence(substream, ULONG_MAX); |
| } |
| |
| static struct action_ops snd_pcm_action_reset = { |
| .pre_action = snd_pcm_pre_reset, |
| .do_action = snd_pcm_do_reset, |
| .post_action = snd_pcm_post_reset |
| }; |
| |
| static int snd_pcm_reset(snd_pcm_substream_t *substream) |
| { |
| return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); |
| } |
| |
| /* |
| * prepare ioctl |
| */ |
| static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (snd_pcm_running(substream)) |
| return -EBUSY; |
| return 0; |
| } |
| |
| static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state) |
| { |
| int err; |
| err = substream->ops->prepare(substream); |
| if (err < 0) |
| return err; |
| return snd_pcm_do_reset(substream, 0); |
| } |
| |
| static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| runtime->control->appl_ptr = runtime->status->hw_ptr; |
| runtime->status->state = SNDRV_PCM_STATE_PREPARED; |
| } |
| |
| static struct action_ops snd_pcm_action_prepare = { |
| .pre_action = snd_pcm_pre_prepare, |
| .do_action = snd_pcm_do_prepare, |
| .post_action = snd_pcm_post_prepare |
| }; |
| |
| /** |
| * snd_pcm_prepare |
| * @substream: the PCM substream instance |
| * |
| * Prepare the PCM substream to be triggerable. |
| */ |
| int snd_pcm_prepare(snd_pcm_substream_t *substream) |
| { |
| int res; |
| snd_card_t *card = substream->pcm->card; |
| |
| snd_power_lock(card); |
| if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) |
| res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0); |
| snd_power_unlock(card); |
| return res; |
| } |
| |
| /* |
| * drain ioctl |
| */ |
| |
| static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state) |
| { |
| if (substream->ffile->f_flags & O_NONBLOCK) |
| return -EAGAIN; |
| substream->runtime->trigger_master = substream; |
| return 0; |
| } |
| |
| static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_PREPARED: |
| /* start playback stream if possible */ |
| if (! snd_pcm_playback_empty(substream)) { |
| snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); |
| snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); |
| } |
| break; |
| case SNDRV_PCM_STATE_RUNNING: |
| runtime->status->state = SNDRV_PCM_STATE_DRAINING; |
| break; |
| default: |
| break; |
| } |
| } else { |
| /* stop running stream */ |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { |
| int state = snd_pcm_capture_avail(runtime) > 0 ? |
| SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
| snd_pcm_do_stop(substream, state); |
| snd_pcm_post_stop(substream, state); |
| } |
| } |
| return 0; |
| } |
| |
| static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state) |
| { |
| } |
| |
| static struct action_ops snd_pcm_action_drain_init = { |
| .pre_action = snd_pcm_pre_drain_init, |
| .do_action = snd_pcm_do_drain_init, |
| .post_action = snd_pcm_post_drain_init |
| }; |
| |
| struct drain_rec { |
| snd_pcm_substream_t *substream; |
| wait_queue_t wait; |
| snd_pcm_uframes_t stop_threshold; |
| }; |
| |
| static int snd_pcm_drop(snd_pcm_substream_t *substream); |
| |
| /* |
| * Drain the stream(s). |
| * When the substream is linked, sync until the draining of all playback streams |
| * is finished. |
| * After this call, all streams are supposed to be either SETUP or DRAINING |
| * (capture only) state. |
| */ |
| static int snd_pcm_drain(snd_pcm_substream_t *substream) |
| { |
| snd_card_t *card; |
| snd_pcm_runtime_t *runtime; |
| struct list_head *pos; |
| int result = 0; |
| int i, num_drecs; |
| struct drain_rec *drec, drec_tmp, *d; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| card = substream->pcm->card; |
| runtime = substream->runtime; |
| |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| |
| snd_power_lock(card); |
| if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); |
| if (result < 0) { |
| snd_power_unlock(card); |
| return result; |
| } |
| } |
| |
| /* allocate temporary record for drain sync */ |
| down_read(&snd_pcm_link_rwsem); |
| if (snd_pcm_stream_linked(substream)) { |
| drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); |
| if (! drec) { |
| up_read(&snd_pcm_link_rwsem); |
| snd_power_unlock(card); |
| return -ENOMEM; |
| } |
| } else |
| drec = &drec_tmp; |
| |
| /* count only playback streams */ |
| num_drecs = 0; |
| snd_pcm_group_for_each(pos, substream) { |
| snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos); |
| runtime = s->runtime; |
| if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| d = &drec[num_drecs++]; |
| d->substream = s; |
| init_waitqueue_entry(&d->wait, current); |
| add_wait_queue(&runtime->sleep, &d->wait); |
| /* stop_threshold fixup to avoid endless loop when |
| * stop_threshold > buffer_size |
| */ |
| d->stop_threshold = runtime->stop_threshold; |
| if (runtime->stop_threshold > runtime->buffer_size) |
| runtime->stop_threshold = runtime->buffer_size; |
| } |
| } |
| up_read(&snd_pcm_link_rwsem); |
| if (! num_drecs) |
| goto _error; |
| |
| snd_pcm_stream_lock_irq(substream); |
| /* resume pause */ |
| if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
| snd_pcm_pause(substream, 0); |
| |
| /* pre-start/stop - all running streams are changed to DRAINING state */ |
| result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); |
| if (result < 0) { |
| snd_pcm_stream_unlock_irq(substream); |
| goto _error; |
| } |
| |
| for (;;) { |
| long tout; |
| if (signal_pending(current)) { |
| result = -ERESTARTSYS; |
| break; |
| } |
| /* all finished? */ |
| for (i = 0; i < num_drecs; i++) { |
| runtime = drec[i].substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) |
| break; |
| } |
| if (i == num_drecs) |
| break; /* yes, all drained */ |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| snd_pcm_stream_unlock_irq(substream); |
| snd_power_unlock(card); |
| tout = schedule_timeout(10 * HZ); |
| snd_power_lock(card); |
| snd_pcm_stream_lock_irq(substream); |
| if (tout == 0) { |
| if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
| result = -ESTRPIPE; |
| else { |
| snd_printd("playback drain error (DMA or IRQ trouble?)\n"); |
| snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
| result = -EIO; |
| } |
| break; |
| } |
| } |
| |
| snd_pcm_stream_unlock_irq(substream); |
| |
| _error: |
| for (i = 0; i < num_drecs; i++) { |
| d = &drec[i]; |
| runtime = d->substream->runtime; |
| remove_wait_queue(&runtime->sleep, &d->wait); |
| runtime->stop_threshold = d->stop_threshold; |
| } |
| |
| if (drec != &drec_tmp) |
| kfree(drec); |
| snd_power_unlock(card); |
| |
| return result; |
| } |
| |
| /* |
| * drop ioctl |
| * |
| * Immediately put all linked substreams into SETUP state. |
| */ |
| static int snd_pcm_drop(snd_pcm_substream_t *substream) |
| { |
| snd_pcm_runtime_t *runtime; |
| snd_card_t *card; |
| int result = 0; |
| |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| card = substream->pcm->card; |
| |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| |
| snd_power_lock(card); |
| if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); |
| if (result < 0) |
| goto _unlock; |
| } |
| |
| snd_pcm_stream_lock_irq(substream); |
| /* resume pause */ |
| if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
| snd_pcm_pause(substream, 0); |
| |
| snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
| /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ |
| snd_pcm_stream_unlock_irq(substream); |
| _unlock: |
| snd_power_unlock(card); |
| return result; |
| } |
| |
| |
| /* WARNING: Don't forget to fput back the file */ |
| extern int snd_major; |
| static struct file *snd_pcm_file_fd(int fd) |
| { |
| struct file *file; |
| struct inode *inode; |
| unsigned short minor; |
| file = fget(fd); |
| if (!file) |
| return NULL; |
| inode = file->f_dentry->d_inode; |
| if (!S_ISCHR(inode->i_mode) || |
| imajor(inode) != snd_major) { |
| fput(file); |
| return NULL; |
| } |
| minor = iminor(inode); |
| if (minor >= 256 || |
| minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) { |
| fput(file); |
| return NULL; |
| } |
| return file; |
| } |
| |
| /* |
| * PCM link handling |
| */ |
| static int snd_pcm_link(snd_pcm_substream_t *substream, int fd) |
| { |
| int res = 0; |
| struct file *file; |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream1; |
| |
| file = snd_pcm_file_fd(fd); |
| if (!file) |
| return -EBADFD; |
| pcm_file = file->private_data; |
| substream1 = pcm_file->substream; |
| down_write(&snd_pcm_link_rwsem); |
| write_lock_irq(&snd_pcm_link_rwlock); |
| if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || |
| substream->runtime->status->state != substream1->runtime->status->state) { |
| res = -EBADFD; |
| goto _end; |
| } |
| if (snd_pcm_stream_linked(substream1)) { |
| res = -EALREADY; |
| goto _end; |
| } |
| if (!snd_pcm_stream_linked(substream)) { |
| substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC); |
| if (substream->group == NULL) { |
| res = -ENOMEM; |
| goto _end; |
| } |
| spin_lock_init(&substream->group->lock); |
| INIT_LIST_HEAD(&substream->group->substreams); |
| list_add_tail(&substream->link_list, &substream->group->substreams); |
| substream->group->count = 1; |
| } |
| list_add_tail(&substream1->link_list, &substream->group->substreams); |
| substream->group->count++; |
| substream1->group = substream->group; |
| _end: |
| write_unlock_irq(&snd_pcm_link_rwlock); |
| up_write(&snd_pcm_link_rwsem); |
| fput(file); |
| return res; |
| } |
| |
| static void relink_to_local(snd_pcm_substream_t *substream) |
| { |
| substream->group = &substream->self_group; |
| INIT_LIST_HEAD(&substream->self_group.substreams); |
| list_add_tail(&substream->link_list, &substream->self_group.substreams); |
| } |
| |
| static int snd_pcm_unlink(snd_pcm_substream_t *substream) |
| { |
| struct list_head *pos; |
| int res = 0; |
| |
| down_write(&snd_pcm_link_rwsem); |
| write_lock_irq(&snd_pcm_link_rwlock); |
| if (!snd_pcm_stream_linked(substream)) { |
| res = -EALREADY; |
| goto _end; |
| } |
| list_del(&substream->link_list); |
| substream->group->count--; |
| if (substream->group->count == 1) { /* detach the last stream, too */ |
| snd_pcm_group_for_each(pos, substream) { |
| relink_to_local(snd_pcm_group_substream_entry(pos)); |
| break; |
| } |
| kfree(substream->group); |
| } |
| relink_to_local(substream); |
| _end: |
| write_unlock_irq(&snd_pcm_link_rwlock); |
| up_write(&snd_pcm_link_rwsem); |
| return res; |
| } |
| |
| /* |
| * hw configurator |
| */ |
| static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t t; |
| snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
| hw_param_interval_c(params, rule->deps[1]), &t); |
| return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| } |
| |
| static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t t; |
| snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
| hw_param_interval_c(params, rule->deps[1]), &t); |
| return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| } |
| |
| static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t t; |
| snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
| hw_param_interval_c(params, rule->deps[1]), |
| (unsigned long) rule->private, &t); |
| return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| } |
| |
| static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t t; |
| snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
| (unsigned long) rule->private, |
| hw_param_interval_c(params, rule->deps[1]), &t); |
| return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| } |
| |
| static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| unsigned int k; |
| snd_interval_t *i = hw_param_interval(params, rule->deps[0]); |
| snd_mask_t m; |
| snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
| snd_mask_any(&m); |
| for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { |
| int bits; |
| if (! snd_mask_test(mask, k)) |
| continue; |
| bits = snd_pcm_format_physical_width(k); |
| if (bits <= 0) |
| continue; /* ignore invalid formats */ |
| if ((unsigned)bits < i->min || (unsigned)bits > i->max) |
| snd_mask_reset(&m, k); |
| } |
| return snd_mask_refine(mask, &m); |
| } |
| |
| static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t t; |
| unsigned int k; |
| t.min = UINT_MAX; |
| t.max = 0; |
| t.openmin = 0; |
| t.openmax = 0; |
| for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { |
| int bits; |
| if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) |
| continue; |
| bits = snd_pcm_format_physical_width(k); |
| if (bits <= 0) |
| continue; /* ignore invalid formats */ |
| if (t.min > (unsigned)bits) |
| t.min = bits; |
| if (t.max < (unsigned)bits) |
| t.max = bits; |
| } |
| t.integer = 1; |
| return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| } |
| |
| #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 |
| #error "Change this table" |
| #endif |
| |
| static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, |
| 48000, 64000, 88200, 96000, 176400, 192000 }; |
| |
| static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_pcm_hardware_t *hw = rule->private; |
| return snd_interval_list(hw_param_interval(params, rule->var), |
| ARRAY_SIZE(rates), rates, hw->rates); |
| } |
| |
| static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params, |
| snd_pcm_hw_rule_t *rule) |
| { |
| snd_interval_t t; |
| snd_pcm_substream_t *substream = rule->private; |
| t.min = 0; |
| t.max = substream->buffer_bytes_max; |
| t.openmin = 0; |
| t.openmax = 0; |
| t.integer = 1; |
| return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| } |
| |
| int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; |
| int k, err; |
| |
| for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { |
| snd_mask_any(constrs_mask(constrs, k)); |
| } |
| |
| for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { |
| snd_interval_any(constrs_interval(constrs, k)); |
| } |
| |
| snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); |
| snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); |
| snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); |
| snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); |
| snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); |
| |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, |
| snd_pcm_hw_rule_format, NULL, |
| SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, |
| snd_pcm_hw_rule_sample_bits, NULL, |
| SNDRV_PCM_HW_PARAM_FORMAT, |
| SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, |
| snd_pcm_hw_rule_div, NULL, |
| SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, |
| snd_pcm_hw_rule_mul, NULL, |
| SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, |
| snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, |
| snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
| snd_pcm_hw_rule_div, NULL, |
| SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, |
| snd_pcm_hw_rule_div, NULL, |
| SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| snd_pcm_hw_rule_div, NULL, |
| SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| snd_pcm_hw_rule_muldivk, (void*) 1000000, |
| SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| snd_pcm_hw_rule_mul, NULL, |
| SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| snd_pcm_hw_rule_muldivk, (void*) 1000000, |
| SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, |
| snd_pcm_hw_rule_muldivk, (void*) 8, |
| SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
| snd_pcm_hw_rule_muldivk, (void*) 8, |
| SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, |
| snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| return err; |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, |
| snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| return err; |
| return 0; |
| } |
| |
| int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_hardware_t *hw = &runtime->hw; |
| int err; |
| unsigned int mask = 0; |
| |
| if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
| mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; |
| if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) |
| mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; |
| if (hw->info & SNDRV_PCM_INFO_MMAP) { |
| if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
| mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; |
| if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) |
| mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; |
| if (hw->info & SNDRV_PCM_INFO_COMPLEX) |
| mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; |
| } |
| err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, |
| hw->channels_min, hw->channels_max); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, |
| hw->rate_min, hw->rate_max); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, |
| hw->period_bytes_min, hw->period_bytes_max); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, |
| hw->periods_min, hw->periods_max); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
| hw->period_bytes_min, hw->buffer_bytes_max); |
| snd_assert(err >= 0, return -EINVAL); |
| |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
| snd_pcm_hw_rule_buffer_bytes_max, substream, |
| SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); |
| if (err < 0) |
| return err; |
| |
| /* FIXME: remove */ |
| if (runtime->dma_bytes) { |
| err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); |
| snd_assert(err >= 0, return -EINVAL); |
| } |
| |
| if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| snd_pcm_hw_rule_rate, hw, |
| SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| return err; |
| } |
| |
| /* FIXME: this belong to lowlevel */ |
| snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME, |
| 1000000 / HZ, 1000000 / HZ); |
| snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
| |
| return 0; |
| } |
| |
| static void snd_pcm_add_file(snd_pcm_str_t *str, |
| snd_pcm_file_t *pcm_file) |
| { |
| pcm_file->next = str->files; |
| str->files = pcm_file; |
| } |
| |
| static void snd_pcm_remove_file(snd_pcm_str_t *str, |
| snd_pcm_file_t *pcm_file) |
| { |
| snd_pcm_file_t * pcm_file1; |
| if (str->files == pcm_file) { |
| str->files = pcm_file->next; |
| } else { |
| pcm_file1 = str->files; |
| while (pcm_file1 && pcm_file1->next != pcm_file) |
| pcm_file1 = pcm_file1->next; |
| if (pcm_file1 != NULL) |
| pcm_file1->next = pcm_file->next; |
| } |
| } |
| |
| static int snd_pcm_release_file(snd_pcm_file_t * pcm_file) |
| { |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| snd_pcm_str_t * str; |
| |
| snd_assert(pcm_file != NULL, return -ENXIO); |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| str = substream->pstr; |
| snd_pcm_unlink(substream); |
| if (substream->ffile != NULL) { |
| if (substream->ops->hw_free != NULL) |
| substream->ops->hw_free(substream); |
| substream->ops->close(substream); |
| substream->ffile = NULL; |
| } |
| snd_pcm_remove_file(str, pcm_file); |
| snd_pcm_release_substream(substream); |
| kfree(pcm_file); |
| return 0; |
| } |
| |
| static int snd_pcm_open_file(struct file *file, |
| snd_pcm_t *pcm, |
| int stream, |
| snd_pcm_file_t **rpcm_file) |
| { |
| int err = 0; |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_str_t *str; |
| |
| snd_assert(rpcm_file != NULL, return -EINVAL); |
| *rpcm_file = NULL; |
| |
| pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
| if (pcm_file == NULL) { |
| return -ENOMEM; |
| } |
| |
| if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) { |
| kfree(pcm_file); |
| return err; |
| } |
| |
| str = substream->pstr; |
| substream->file = pcm_file; |
| substream->no_mmap_ctrl = 0; |
| |
| pcm_file->substream = substream; |
| |
| snd_pcm_add_file(str, pcm_file); |
| |
| err = snd_pcm_hw_constraints_init(substream); |
| if (err < 0) { |
| snd_printd("snd_pcm_hw_constraints_init failed\n"); |
| snd_pcm_release_file(pcm_file); |
| return err; |
| } |
| |
| if ((err = substream->ops->open(substream)) < 0) { |
| snd_pcm_release_file(pcm_file); |
| return err; |
| } |
| substream->ffile = file; |
| |
| err = snd_pcm_hw_constraints_complete(substream); |
| if (err < 0) { |
| snd_printd("snd_pcm_hw_constraints_complete failed\n"); |
| snd_pcm_release_file(pcm_file); |
| return err; |
| } |
| |
| file->private_data = pcm_file; |
| *rpcm_file = pcm_file; |
| return 0; |
| } |
| |
| static int snd_pcm_open(struct inode *inode, struct file *file) |
| { |
| int cardnum = SNDRV_MINOR_CARD(iminor(inode)); |
| int device = SNDRV_MINOR_DEVICE(iminor(inode)); |
| int err; |
| snd_pcm_t *pcm; |
| snd_pcm_file_t *pcm_file; |
| wait_queue_t wait; |
| |
| if (device < SNDRV_MINOR_PCM_PLAYBACK || device >= SNDRV_MINOR_DEVICES) |
| return -ENXIO; |
| pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)]; |
| if (pcm == NULL) { |
| err = -ENODEV; |
| goto __error1; |
| } |
| err = snd_card_file_add(pcm->card, file); |
| if (err < 0) |
| goto __error1; |
| if (!try_module_get(pcm->card->module)) { |
| err = -EFAULT; |
| goto __error2; |
| } |
| init_waitqueue_entry(&wait, current); |
| add_wait_queue(&pcm->open_wait, &wait); |
| down(&pcm->open_mutex); |
| while (1) { |
| err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file); |
| if (err >= 0) |
| break; |
| if (err == -EAGAIN) { |
| if (file->f_flags & O_NONBLOCK) { |
| err = -EBUSY; |
| break; |
| } |
| } else |
| break; |
| set_current_state(TASK_INTERRUPTIBLE); |
| up(&pcm->open_mutex); |
| schedule(); |
| down(&pcm->open_mutex); |
| if (signal_pending(current)) { |
| err = -ERESTARTSYS; |
| break; |
| } |
| } |
| remove_wait_queue(&pcm->open_wait, &wait); |
| up(&pcm->open_mutex); |
| if (err < 0) |
| goto __error; |
| return err; |
| |
| __error: |
| module_put(pcm->card->module); |
| __error2: |
| snd_card_file_remove(pcm->card, file); |
| __error1: |
| return err; |
| } |
| |
| static int snd_pcm_release(struct inode *inode, struct file *file) |
| { |
| snd_pcm_t *pcm; |
| snd_pcm_substream_t *substream; |
| snd_pcm_file_t *pcm_file; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| snd_assert(!atomic_read(&substream->runtime->mmap_count), ); |
| pcm = substream->pcm; |
| snd_pcm_drop(substream); |
| fasync_helper(-1, file, 0, &substream->runtime->fasync); |
| down(&pcm->open_mutex); |
| snd_pcm_release_file(pcm_file); |
| up(&pcm->open_mutex); |
| wake_up(&pcm->open_wait); |
| module_put(pcm->card->module); |
| snd_card_file_remove(pcm->card, file); |
| return 0; |
| } |
| |
| static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_sframes_t appl_ptr; |
| snd_pcm_sframes_t ret; |
| snd_pcm_sframes_t hw_avail; |
| |
| if (frames == 0) |
| return 0; |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_PREPARED: |
| break; |
| case SNDRV_PCM_STATE_DRAINING: |
| case SNDRV_PCM_STATE_RUNNING: |
| if (snd_pcm_update_hw_ptr(substream) >= 0) |
| break; |
| /* Fall through */ |
| case SNDRV_PCM_STATE_XRUN: |
| ret = -EPIPE; |
| goto __end; |
| default: |
| ret = -EBADFD; |
| goto __end; |
| } |
| |
| hw_avail = snd_pcm_playback_hw_avail(runtime); |
| if (hw_avail <= 0) { |
| ret = 0; |
| goto __end; |
| } |
| if (frames > (snd_pcm_uframes_t)hw_avail) |
| frames = hw_avail; |
| else |
| frames -= frames % runtime->xfer_align; |
| appl_ptr = runtime->control->appl_ptr - frames; |
| if (appl_ptr < 0) |
| appl_ptr += runtime->boundary; |
| runtime->control->appl_ptr = appl_ptr; |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && |
| runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| ret = frames; |
| __end: |
| snd_pcm_stream_unlock_irq(substream); |
| return ret; |
| } |
| |
| static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_sframes_t appl_ptr; |
| snd_pcm_sframes_t ret; |
| snd_pcm_sframes_t hw_avail; |
| |
| if (frames == 0) |
| return 0; |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_DRAINING: |
| break; |
| case SNDRV_PCM_STATE_RUNNING: |
| if (snd_pcm_update_hw_ptr(substream) >= 0) |
| break; |
| /* Fall through */ |
| case SNDRV_PCM_STATE_XRUN: |
| ret = -EPIPE; |
| goto __end; |
| default: |
| ret = -EBADFD; |
| goto __end; |
| } |
| |
| hw_avail = snd_pcm_capture_hw_avail(runtime); |
| if (hw_avail <= 0) { |
| ret = 0; |
| goto __end; |
| } |
| if (frames > (snd_pcm_uframes_t)hw_avail) |
| frames = hw_avail; |
| else |
| frames -= frames % runtime->xfer_align; |
| appl_ptr = runtime->control->appl_ptr - frames; |
| if (appl_ptr < 0) |
| appl_ptr += runtime->boundary; |
| runtime->control->appl_ptr = appl_ptr; |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && |
| runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| ret = frames; |
| __end: |
| snd_pcm_stream_unlock_irq(substream); |
| return ret; |
| } |
| |
| static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_sframes_t appl_ptr; |
| snd_pcm_sframes_t ret; |
| snd_pcm_sframes_t avail; |
| |
| if (frames == 0) |
| return 0; |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_PAUSED: |
| break; |
| case SNDRV_PCM_STATE_DRAINING: |
| case SNDRV_PCM_STATE_RUNNING: |
| if (snd_pcm_update_hw_ptr(substream) >= 0) |
| break; |
| /* Fall through */ |
| case SNDRV_PCM_STATE_XRUN: |
| ret = -EPIPE; |
| goto __end; |
| default: |
| ret = -EBADFD; |
| goto __end; |
| } |
| |
| avail = snd_pcm_playback_avail(runtime); |
| if (avail <= 0) { |
| ret = 0; |
| goto __end; |
| } |
| if (frames > (snd_pcm_uframes_t)avail) |
| frames = avail; |
| else |
| frames -= frames % runtime->xfer_align; |
| appl_ptr = runtime->control->appl_ptr + frames; |
| if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) |
| appl_ptr -= runtime->boundary; |
| runtime->control->appl_ptr = appl_ptr; |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && |
| runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| ret = frames; |
| __end: |
| snd_pcm_stream_unlock_irq(substream); |
| return ret; |
| } |
| |
| static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_sframes_t appl_ptr; |
| snd_pcm_sframes_t ret; |
| snd_pcm_sframes_t avail; |
| |
| if (frames == 0) |
| return 0; |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_DRAINING: |
| case SNDRV_PCM_STATE_PAUSED: |
| break; |
| case SNDRV_PCM_STATE_RUNNING: |
| if (snd_pcm_update_hw_ptr(substream) >= 0) |
| break; |
| /* Fall through */ |
| case SNDRV_PCM_STATE_XRUN: |
| ret = -EPIPE; |
| goto __end; |
| default: |
| ret = -EBADFD; |
| goto __end; |
| } |
| |
| avail = snd_pcm_capture_avail(runtime); |
| if (avail <= 0) { |
| ret = 0; |
| goto __end; |
| } |
| if (frames > (snd_pcm_uframes_t)avail) |
| frames = avail; |
| else |
| frames -= frames % runtime->xfer_align; |
| appl_ptr = runtime->control->appl_ptr + frames; |
| if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) |
| appl_ptr -= runtime->boundary; |
| runtime->control->appl_ptr = appl_ptr; |
| if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && |
| runtime->sleep_min) |
| snd_pcm_tick_prepare(substream); |
| ret = frames; |
| __end: |
| snd_pcm_stream_unlock_irq(substream); |
| return ret; |
| } |
| |
| static int snd_pcm_hwsync(snd_pcm_substream_t *substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| int err; |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_DRAINING: |
| if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| goto __badfd; |
| case SNDRV_PCM_STATE_RUNNING: |
| if ((err = snd_pcm_update_hw_ptr(substream)) < 0) |
| break; |
| /* Fall through */ |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_SUSPENDED: |
| err = 0; |
| break; |
| case SNDRV_PCM_STATE_XRUN: |
| err = -EPIPE; |
| break; |
| default: |
| __badfd: |
| err = -EBADFD; |
| break; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| return err; |
| } |
| |
| static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| int err; |
| snd_pcm_sframes_t n = 0; |
| |
| snd_pcm_stream_lock_irq(substream); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_DRAINING: |
| if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| goto __badfd; |
| case SNDRV_PCM_STATE_RUNNING: |
| if ((err = snd_pcm_update_hw_ptr(substream)) < 0) |
| break; |
| /* Fall through */ |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_SUSPENDED: |
| err = 0; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| n = snd_pcm_playback_hw_avail(runtime); |
| else |
| n = snd_pcm_capture_avail(runtime); |
| break; |
| case SNDRV_PCM_STATE_XRUN: |
| err = -EPIPE; |
| break; |
| default: |
| __badfd: |
| err = -EBADFD; |
| break; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| if (!err) |
| if (put_user(n, res)) |
| err = -EFAULT; |
| return err; |
| } |
| |
| static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| struct sndrv_pcm_sync_ptr sync_ptr; |
| volatile struct sndrv_pcm_mmap_status *status; |
| volatile struct sndrv_pcm_mmap_control *control; |
| int err; |
| |
| memset(&sync_ptr, 0, sizeof(sync_ptr)); |
| if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) |
| return -EFAULT; |
| if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control))) |
| return -EFAULT; |
| status = runtime->status; |
| control = runtime->control; |
| if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { |
| err = snd_pcm_hwsync(substream); |
| if (err < 0) |
| return err; |
| } |
| snd_pcm_stream_lock_irq(substream); |
| if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) |
| control->appl_ptr = sync_ptr.c.control.appl_ptr; |
| else |
| sync_ptr.c.control.appl_ptr = control->appl_ptr; |
| if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
| control->avail_min = sync_ptr.c.control.avail_min; |
| else |
| sync_ptr.c.control.avail_min = control->avail_min; |
| sync_ptr.s.status.state = status->state; |
| sync_ptr.s.status.hw_ptr = status->hw_ptr; |
| sync_ptr.s.status.tstamp = status->tstamp; |
| sync_ptr.s.status.suspended_state = status->suspended_state; |
| snd_pcm_stream_unlock_irq(substream); |
| if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream, |
| unsigned int cmd, void __user *arg); |
| static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream, |
| unsigned int cmd, void __user *arg); |
| |
| static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream, |
| unsigned int cmd, void __user *arg) |
| { |
| snd_assert(substream != NULL, return -ENXIO); |
| |
| switch (cmd) { |
| case SNDRV_PCM_IOCTL_PVERSION: |
| return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; |
| case SNDRV_PCM_IOCTL_INFO: |
| return snd_pcm_info_user(substream, arg); |
| case SNDRV_PCM_IOCTL_TSTAMP: |
| { |
| int xarg; |
| if (get_user(xarg, (int __user *)arg)) |
| return -EFAULT; |
| substream->runtime->tstamp_timespec = xarg ? 1 : 0; |
| return 0; |
| } |
| case SNDRV_PCM_IOCTL_HW_REFINE: |
| return snd_pcm_hw_refine_user(substream, arg); |
| case SNDRV_PCM_IOCTL_HW_PARAMS: |
| return snd_pcm_hw_params_user(substream, arg); |
| case SNDRV_PCM_IOCTL_HW_FREE: |
| return snd_pcm_hw_free(substream); |
| case SNDRV_PCM_IOCTL_SW_PARAMS: |
| return snd_pcm_sw_params_user(substream, arg); |
| case SNDRV_PCM_IOCTL_STATUS: |
| return snd_pcm_status_user(substream, arg); |
| case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
| return snd_pcm_channel_info_user(substream, arg); |
| case SNDRV_PCM_IOCTL_PREPARE: |
| return snd_pcm_prepare(substream); |
| case SNDRV_PCM_IOCTL_RESET: |
| return snd_pcm_reset(substream); |
| case SNDRV_PCM_IOCTL_START: |
| return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); |
| case SNDRV_PCM_IOCTL_LINK: |
| return snd_pcm_link(substream, (int)(unsigned long) arg); |
| case SNDRV_PCM_IOCTL_UNLINK: |
| return snd_pcm_unlink(substream); |
| case SNDRV_PCM_IOCTL_RESUME: |
| return snd_pcm_resume(substream); |
| case SNDRV_PCM_IOCTL_XRUN: |
| return snd_pcm_xrun(substream); |
| case SNDRV_PCM_IOCTL_HWSYNC: |
| return snd_pcm_hwsync(substream); |
| case SNDRV_PCM_IOCTL_DELAY: |
| return snd_pcm_delay(substream, arg); |
| case SNDRV_PCM_IOCTL_SYNC_PTR: |
| return snd_pcm_sync_ptr(substream, arg); |
| case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
| return snd_pcm_hw_refine_old_user(substream, arg); |
| case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: |
| return snd_pcm_hw_params_old_user(substream, arg); |
| case SNDRV_PCM_IOCTL_DRAIN: |
| return snd_pcm_drain(substream); |
| case SNDRV_PCM_IOCTL_DROP: |
| return snd_pcm_drop(substream); |
| } |
| snd_printd("unknown ioctl = 0x%x\n", cmd); |
| return -ENOTTY; |
| } |
| |
| static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream, |
| unsigned int cmd, void __user *arg) |
| { |
| snd_assert(substream != NULL, return -ENXIO); |
| snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); |
| switch (cmd) { |
| case SNDRV_PCM_IOCTL_WRITEI_FRAMES: |
| { |
| snd_xferi_t xferi; |
| snd_xferi_t __user *_xferi = arg; |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_sframes_t result; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (put_user(0, &_xferi->result)) |
| return -EFAULT; |
| if (copy_from_user(&xferi, _xferi, sizeof(xferi))) |
| return -EFAULT; |
| result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); |
| __put_user(result, &_xferi->result); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_WRITEN_FRAMES: |
| { |
| snd_xfern_t xfern; |
| snd_xfern_t __user *_xfern = arg; |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| void __user **bufs; |
| snd_pcm_sframes_t result; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (runtime->channels > 128) |
| return -EINVAL; |
| if (put_user(0, &_xfern->result)) |
| return -EFAULT; |
| if (copy_from_user(&xfern, _xfern, sizeof(xfern))) |
| return -EFAULT; |
| bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); |
| if (bufs == NULL) |
| return -ENOMEM; |
| if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { |
| kfree(bufs); |
| return -EFAULT; |
| } |
| result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
| kfree(bufs); |
| __put_user(result, &_xfern->result); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_REWIND: |
| { |
| snd_pcm_uframes_t frames; |
| snd_pcm_uframes_t __user *_frames = arg; |
| snd_pcm_sframes_t result; |
| if (get_user(frames, _frames)) |
| return -EFAULT; |
| if (put_user(0, _frames)) |
| return -EFAULT; |
| result = snd_pcm_playback_rewind(substream, frames); |
| __put_user(result, _frames); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_FORWARD: |
| { |
| snd_pcm_uframes_t frames; |
| snd_pcm_uframes_t __user *_frames = arg; |
| snd_pcm_sframes_t result; |
| if (get_user(frames, _frames)) |
| return -EFAULT; |
| if (put_user(0, _frames)) |
| return -EFAULT; |
| result = snd_pcm_playback_forward(substream, frames); |
| __put_user(result, _frames); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_PAUSE: |
| { |
| int res; |
| snd_pcm_stream_lock_irq(substream); |
| res = snd_pcm_pause(substream, (int)(unsigned long)arg); |
| snd_pcm_stream_unlock_irq(substream); |
| return res; |
| } |
| } |
| return snd_pcm_common_ioctl1(substream, cmd, arg); |
| } |
| |
| static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream, |
| unsigned int cmd, void __user *arg) |
| { |
| snd_assert(substream != NULL, return -ENXIO); |
| snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); |
| switch (cmd) { |
| case SNDRV_PCM_IOCTL_READI_FRAMES: |
| { |
| snd_xferi_t xferi; |
| snd_xferi_t __user *_xferi = arg; |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_pcm_sframes_t result; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (put_user(0, &_xferi->result)) |
| return -EFAULT; |
| if (copy_from_user(&xferi, _xferi, sizeof(xferi))) |
| return -EFAULT; |
| result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); |
| __put_user(result, &_xferi->result); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_READN_FRAMES: |
| { |
| snd_xfern_t xfern; |
| snd_xfern_t __user *_xfern = arg; |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| void *bufs; |
| snd_pcm_sframes_t result; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (runtime->channels > 128) |
| return -EINVAL; |
| if (put_user(0, &_xfern->result)) |
| return -EFAULT; |
| if (copy_from_user(&xfern, _xfern, sizeof(xfern))) |
| return -EFAULT; |
| bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); |
| if (bufs == NULL) |
| return -ENOMEM; |
| if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { |
| kfree(bufs); |
| return -EFAULT; |
| } |
| result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
| kfree(bufs); |
| __put_user(result, &_xfern->result); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_REWIND: |
| { |
| snd_pcm_uframes_t frames; |
| snd_pcm_uframes_t __user *_frames = arg; |
| snd_pcm_sframes_t result; |
| if (get_user(frames, _frames)) |
| return -EFAULT; |
| if (put_user(0, _frames)) |
| return -EFAULT; |
| result = snd_pcm_capture_rewind(substream, frames); |
| __put_user(result, _frames); |
| return result < 0 ? result : 0; |
| } |
| case SNDRV_PCM_IOCTL_FORWARD: |
| { |
| snd_pcm_uframes_t frames; |
| snd_pcm_uframes_t __user *_frames = arg; |
| snd_pcm_sframes_t result; |
| if (get_user(frames, _frames)) |
| return -EFAULT; |
| if (put_user(0, _frames)) |
| return -EFAULT; |
| result = snd_pcm_capture_forward(substream, frames); |
| __put_user(result, _frames); |
| return result < 0 ? result : 0; |
| } |
| } |
| return snd_pcm_common_ioctl1(substream, cmd, arg); |
| } |
| |
| static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| snd_pcm_file_t *pcm_file; |
| |
| pcm_file = file->private_data; |
| |
| if (((cmd >> 8) & 0xff) != 'A') |
| return -ENOTTY; |
| |
| return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg); |
| } |
| |
| static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| snd_pcm_file_t *pcm_file; |
| |
| pcm_file = file->private_data; |
| |
| if (((cmd >> 8) & 0xff) != 'A') |
| return -ENOTTY; |
| |
| return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg); |
| } |
| |
| int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, |
| unsigned int cmd, void *arg) |
| { |
| mm_segment_t fs; |
| int result; |
| |
| fs = snd_enter_user(); |
| result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg); |
| snd_leave_user(fs); |
| return result; |
| } |
| |
| int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, |
| unsigned int cmd, void *arg) |
| { |
| mm_segment_t fs; |
| int result; |
| |
| fs = snd_enter_user(); |
| result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg); |
| snd_leave_user(fs); |
| return result; |
| } |
| |
| int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, |
| unsigned int cmd, void *arg) |
| { |
| switch (substream->stream) { |
| case SNDRV_PCM_STREAM_PLAYBACK: |
| return snd_pcm_kernel_playback_ioctl(substream, cmd, arg); |
| case SNDRV_PCM_STREAM_CAPTURE: |
| return snd_pcm_kernel_capture_ioctl(substream, cmd, arg); |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset) |
| { |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| snd_pcm_sframes_t result; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (!frame_aligned(runtime, count)) |
| return -EINVAL; |
| count = bytes_to_frames(runtime, count); |
| result = snd_pcm_lib_read(substream, buf, count); |
| if (result > 0) |
| result = frames_to_bytes(runtime, result); |
| return result; |
| } |
| |
| static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset) |
| { |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| snd_pcm_sframes_t result; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, result = -ENXIO; goto end); |
| runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| result = -EBADFD; |
| goto end; |
| } |
| if (!frame_aligned(runtime, count)) { |
| result = -EINVAL; |
| goto end; |
| } |
| count = bytes_to_frames(runtime, count); |
| result = snd_pcm_lib_write(substream, buf, count); |
| if (result > 0) |
| result = frames_to_bytes(runtime, result); |
| end: |
| return result; |
| } |
| |
| static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector, |
| unsigned long count, loff_t * offset) |
| |
| { |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| snd_pcm_sframes_t result; |
| unsigned long i; |
| void __user **bufs; |
| snd_pcm_uframes_t frames; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (count > 1024 || count != runtime->channels) |
| return -EINVAL; |
| if (!frame_aligned(runtime, _vector->iov_len)) |
| return -EINVAL; |
| frames = bytes_to_samples(runtime, _vector->iov_len); |
| bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); |
| if (bufs == NULL) |
| return -ENOMEM; |
| for (i = 0; i < count; ++i) |
| bufs[i] = _vector[i].iov_base; |
| result = snd_pcm_lib_readv(substream, bufs, frames); |
| if (result > 0) |
| result = frames_to_bytes(runtime, result); |
| kfree(bufs); |
| return result; |
| } |
| |
| static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector, |
| unsigned long count, loff_t * offset) |
| { |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| snd_pcm_sframes_t result; |
| unsigned long i; |
| void __user **bufs; |
| snd_pcm_uframes_t frames; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, result = -ENXIO; goto end); |
| runtime = substream->runtime; |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| result = -EBADFD; |
| goto end; |
| } |
| if (count > 128 || count != runtime->channels || |
| !frame_aligned(runtime, _vector->iov_len)) { |
| result = -EINVAL; |
| goto end; |
| } |
| frames = bytes_to_samples(runtime, _vector->iov_len); |
| bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); |
| if (bufs == NULL) |
| return -ENOMEM; |
| for (i = 0; i < count; ++i) |
| bufs[i] = _vector[i].iov_base; |
| result = snd_pcm_lib_writev(substream, bufs, frames); |
| if (result > 0) |
| result = frames_to_bytes(runtime, result); |
| kfree(bufs); |
| end: |
| return result; |
| } |
| |
| static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) |
| { |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| unsigned int mask; |
| snd_pcm_uframes_t avail; |
| |
| pcm_file = file->private_data; |
| |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| |
| poll_wait(file, &runtime->sleep, wait); |
| |
| snd_pcm_stream_lock_irq(substream); |
| avail = snd_pcm_playback_avail(runtime); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_RUNNING: |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_PAUSED: |
| if (avail >= runtime->control->avail_min) { |
| mask = POLLOUT | POLLWRNORM; |
| break; |
| } |
| /* Fall through */ |
| case SNDRV_PCM_STATE_DRAINING: |
| mask = 0; |
| break; |
| default: |
| mask = POLLOUT | POLLWRNORM | POLLERR; |
| break; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| return mask; |
| } |
| |
| static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) |
| { |
| snd_pcm_file_t *pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| unsigned int mask; |
| snd_pcm_uframes_t avail; |
| |
| pcm_file = file->private_data; |
| |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| |
| poll_wait(file, &runtime->sleep, wait); |
| |
| snd_pcm_stream_lock_irq(substream); |
| avail = snd_pcm_capture_avail(runtime); |
| switch (runtime->status->state) { |
| case SNDRV_PCM_STATE_RUNNING: |
| case SNDRV_PCM_STATE_PREPARED: |
| case SNDRV_PCM_STATE_PAUSED: |
| if (avail >= runtime->control->avail_min) { |
| mask = POLLIN | POLLRDNORM; |
| break; |
| } |
| mask = 0; |
| break; |
| case SNDRV_PCM_STATE_DRAINING: |
| if (avail > 0) { |
| mask = POLLIN | POLLRDNORM; |
| break; |
| } |
| /* Fall through */ |
| default: |
| mask = POLLIN | POLLRDNORM | POLLERR; |
| break; |
| } |
| snd_pcm_stream_unlock_irq(substream); |
| return mask; |
| } |
| |
| /* |
| * mmap support |
| */ |
| |
| /* |
| * Only on coherent architectures, we can mmap the status and the control records |
| * for effcient data transfer. On others, we have to use HWSYNC ioctl... |
| */ |
| #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) |
| /* |
| * mmap status record |
| */ |
| static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type) |
| { |
| snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; |
| snd_pcm_runtime_t *runtime; |
| struct page * page; |
| |
| if (substream == NULL) |
| return NOPAGE_OOM; |
| runtime = substream->runtime; |
| page = virt_to_page(runtime->status); |
| get_page(page); |
| if (type) |
| *type = VM_FAULT_MINOR; |
| return page; |
| } |
| |
| static struct vm_operations_struct snd_pcm_vm_ops_status = |
| { |
| .nopage = snd_pcm_mmap_status_nopage, |
| }; |
| |
| static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file, |
| struct vm_area_struct *area) |
| { |
| snd_pcm_runtime_t *runtime; |
| long size; |
| if (!(area->vm_flags & VM_READ)) |
| return -EINVAL; |
| runtime = substream->runtime; |
| snd_assert(runtime != NULL, return -EAGAIN); |
| size = area->vm_end - area->vm_start; |
| if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))) |
| return -EINVAL; |
| area->vm_ops = &snd_pcm_vm_ops_status; |
| area->vm_private_data = substream; |
| area->vm_flags |= VM_RESERVED; |
| return 0; |
| } |
| |
| /* |
| * mmap control record |
| */ |
| static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type) |
| { |
| snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; |
| snd_pcm_runtime_t *runtime; |
| struct page * page; |
| |
| if (substream == NULL) |
| return NOPAGE_OOM; |
| runtime = substream->runtime; |
| page = virt_to_page(runtime->control); |
| get_page(page); |
| if (type) |
| *type = VM_FAULT_MINOR; |
| return page; |
| } |
| |
| static struct vm_operations_struct snd_pcm_vm_ops_control = |
| { |
| .nopage = snd_pcm_mmap_control_nopage, |
| }; |
| |
| static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file, |
| struct vm_area_struct *area) |
| { |
| snd_pcm_runtime_t *runtime; |
| long size; |
| if (!(area->vm_flags & VM_READ)) |
| return -EINVAL; |
| runtime = substream->runtime; |
| snd_assert(runtime != NULL, return -EAGAIN); |
| size = area->vm_end - area->vm_start; |
| if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t))) |
| return -EINVAL; |
| area->vm_ops = &snd_pcm_vm_ops_control; |
| area->vm_private_data = substream; |
| area->vm_flags |= VM_RESERVED; |
| return 0; |
| } |
| #else /* ! coherent mmap */ |
| /* |
| * don't support mmap for status and control records. |
| */ |
| static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file, |
| struct vm_area_struct *area) |
| { |
| return -ENXIO; |
| } |
| static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file, |
| struct vm_area_struct *area) |
| { |
| return -ENXIO; |
| } |
| #endif /* coherent mmap */ |
| |
| /* |
| * nopage callback for mmapping a RAM page |
| */ |
| static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type) |
| { |
| snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; |
| snd_pcm_runtime_t *runtime; |
| unsigned long offset; |
| struct page * page; |
| void *vaddr; |
| size_t dma_bytes; |
| |
| if (substream == NULL) |
| return NOPAGE_OOM; |
| runtime = substream->runtime; |
| offset = area->vm_pgoff << PAGE_SHIFT; |
| offset += address - area->vm_start; |
| snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); |
| dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
| if (offset > dma_bytes - PAGE_SIZE) |
| return NOPAGE_SIGBUS; |
| if (substream->ops->page) { |
| page = substream->ops->page(substream, offset); |
| if (! page) |
| return NOPAGE_OOM; |
| } else { |
| vaddr = runtime->dma_area + offset; |
| page = virt_to_page(vaddr); |
| } |
| get_page(page); |
| if (type) |
| *type = VM_FAULT_MINOR; |
| return page; |
| } |
| |
| static struct vm_operations_struct snd_pcm_vm_ops_data = |
| { |
| .open = snd_pcm_mmap_data_open, |
| .close = snd_pcm_mmap_data_close, |
| .nopage = snd_pcm_mmap_data_nopage, |
| }; |
| |
| /* |
| * mmap the DMA buffer on RAM |
| */ |
| static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area) |
| { |
| area->vm_ops = &snd_pcm_vm_ops_data; |
| area->vm_private_data = substream; |
| area->vm_flags |= VM_RESERVED; |
| atomic_inc(&substream->runtime->mmap_count); |
| return 0; |
| } |
| |
| /* |
| * mmap the DMA buffer on I/O memory area |
| */ |
| #if SNDRV_PCM_INFO_MMAP_IOMEM |
| static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = |
| { |
| .open = snd_pcm_mmap_data_open, |
| .close = snd_pcm_mmap_data_close, |
| }; |
| |
| int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area) |
| { |
| long size; |
| unsigned long offset; |
| |
| #ifdef pgprot_noncached |
| area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
| #endif |
| area->vm_ops = &snd_pcm_vm_ops_data_mmio; |
| area->vm_private_data = substream; |
| area->vm_flags |= VM_IO; |
| size = area->vm_end - area->vm_start; |
| offset = area->vm_pgoff << PAGE_SHIFT; |
| if (io_remap_pfn_range(area, area->vm_start, |
| (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, |
| size, area->vm_page_prot)) |
| return -EAGAIN; |
| atomic_inc(&substream->runtime->mmap_count); |
| return 0; |
| } |
| #endif /* SNDRV_PCM_INFO_MMAP */ |
| |
| /* |
| * mmap DMA buffer |
| */ |
| int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, |
| struct vm_area_struct *area) |
| { |
| snd_pcm_runtime_t *runtime; |
| long size; |
| unsigned long offset; |
| size_t dma_bytes; |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| if (!(area->vm_flags & (VM_WRITE|VM_READ))) |
| return -EINVAL; |
| } else { |
| if (!(area->vm_flags & VM_READ)) |
| return -EINVAL; |
| } |
| runtime = substream->runtime; |
| snd_assert(runtime != NULL, return -EAGAIN); |
| if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| return -EBADFD; |
| if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) |
| return -ENXIO; |
| if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || |
| runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| return -EINVAL; |
| size = area->vm_end - area->vm_start; |
| offset = area->vm_pgoff << PAGE_SHIFT; |
| dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
| if ((size_t)size > dma_bytes) |
| return -EINVAL; |
| if (offset > dma_bytes - size) |
| return -EINVAL; |
| |
| if (substream->ops->mmap) |
| return substream->ops->mmap(substream, area); |
| else |
| return snd_pcm_default_mmap(substream, area); |
| } |
| |
| static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
| { |
| snd_pcm_file_t * pcm_file; |
| snd_pcm_substream_t *substream; |
| unsigned long offset; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| |
| offset = area->vm_pgoff << PAGE_SHIFT; |
| switch (offset) { |
| case SNDRV_PCM_MMAP_OFFSET_STATUS: |
| if (substream->no_mmap_ctrl) |
| return -ENXIO; |
| return snd_pcm_mmap_status(substream, file, area); |
| case SNDRV_PCM_MMAP_OFFSET_CONTROL: |
| if (substream->no_mmap_ctrl) |
| return -ENXIO; |
| return snd_pcm_mmap_control(substream, file, area); |
| default: |
| return snd_pcm_mmap_data(substream, file, area); |
| } |
| return 0; |
| } |
| |
| static int snd_pcm_fasync(int fd, struct file * file, int on) |
| { |
| snd_pcm_file_t * pcm_file; |
| snd_pcm_substream_t *substream; |
| snd_pcm_runtime_t *runtime; |
| int err; |
| |
| pcm_file = file->private_data; |
| substream = pcm_file->substream; |
| snd_assert(substream != NULL, return -ENXIO); |
| runtime = substream->runtime; |
| |
| err = fasync_helper(fd, file, on, &runtime->fasync); |
| if (err < 0) |
| return err; |
| return 0; |
| } |
| |
| /* |
| * ioctl32 compat |
| */ |
| #ifdef CONFIG_COMPAT |
| #include "pcm_compat.c" |
| #else |
| #define snd_pcm_ioctl_compat NULL |
| #endif |
| |
| /* |
| * To be removed helpers to keep binary compatibility |
| */ |
| |
| #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
| #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) |
| |
| static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams) |
| { |
| unsigned int i; |
| |
| memset(params, 0, sizeof(*params)); |
| params->flags = oparams->flags; |
| for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) |
| params->masks[i].bits[0] = oparams->masks[i]; |
| memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); |
| params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); |
| params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); |
| params->info = oparams->info; |
| params->msbits = oparams->msbits; |
| params->rate_num = oparams->rate_num; |
| params->rate_den = oparams->rate_den; |
| params->fifo_size = oparams->fifo_size; |
| } |
| |
| static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params) |
| { |
| unsigned int i; |
| |
| memset(oparams, 0, sizeof(*oparams)); |
| oparams->flags = params->flags; |
| for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) |
| oparams->masks[i] = params->masks[i].bits[0]; |
| memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); |
| oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); |
| oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); |
| oparams->info = params->info; |
| oparams->msbits = params->msbits; |
| oparams->rate_num = params->rate_num; |
| oparams->rate_den = params->rate_den; |
| oparams->fifo_size = params->fifo_size; |
| } |
| |
| static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams) |
| { |
| snd_pcm_hw_params_t *params; |
| struct sndrv_pcm_hw_params_old *oparams = NULL; |
| int err; |
| |
| params = kmalloc(sizeof(*params), GFP_KERNEL); |
| if (!params) { |
| err = -ENOMEM; |
| goto out; |
| } |
| oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); |
| if (!oparams) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { |
| err = -EFAULT; |
| goto out; |
| } |
| snd_pcm_hw_convert_from_old_params(params, oparams); |
| err = snd_pcm_hw_refine(substream, params); |
| snd_pcm_hw_convert_to_old_params(oparams, params); |
| if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { |
| if (!err) |
| err = -EFAULT; |
| } |
| out: |
| kfree(params); |
| kfree(oparams); |
| return err; |
| } |
| |
| static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams) |
| { |
| snd_pcm_hw_params_t *params; |
| struct sndrv_pcm_hw_params_old *oparams = NULL; |
| int err; |
| |
| params = kmalloc(sizeof(*params), GFP_KERNEL); |
| if (!params) { |
| err = -ENOMEM; |
| goto out; |
| } |
| oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); |
| if (!oparams) { |
| err = -ENOMEM; |
| goto out; |
| } |
| if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { |
| err = -EFAULT; |
| goto out; |
| } |
| snd_pcm_hw_convert_from_old_params(params, oparams); |
| err = snd_pcm_hw_params(substream, params); |
| snd_pcm_hw_convert_to_old_params(oparams, params); |
| if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { |
| if (!err) |
| err = -EFAULT; |
| } |
| out: |
| kfree(params); |
| kfree(oparams); |
| return err; |
| } |
| |
| /* |
| * Register section |
| */ |
| |
| static struct file_operations snd_pcm_f_ops_playback = { |
| .owner = THIS_MODULE, |
| .write = snd_pcm_write, |
| .writev = snd_pcm_writev, |
| .open = snd_pcm_open, |
| .release = snd_pcm_release, |
| .poll = snd_pcm_playback_poll, |
| .unlocked_ioctl = snd_pcm_playback_ioctl, |
| .compat_ioctl = snd_pcm_ioctl_compat, |
| .mmap = snd_pcm_mmap, |
| .fasync = snd_pcm_fasync, |
| }; |
| |
| static struct file_operations snd_pcm_f_ops_capture = { |
| .owner = THIS_MODULE, |
| .read = snd_pcm_read, |
| .readv = snd_pcm_readv, |
| .open = snd_pcm_open, |
| .release = snd_pcm_release, |
| .poll = snd_pcm_capture_poll, |
| .unlocked_ioctl = snd_pcm_capture_ioctl, |
| .compat_ioctl = snd_pcm_ioctl_compat, |
| .mmap = snd_pcm_mmap, |
| .fasync = snd_pcm_fasync, |
| }; |
| |
| snd_minor_t snd_pcm_reg[2] = |
| { |
| { |
| .comment = "digital audio playback", |
| .f_ops = &snd_pcm_f_ops_playback, |
| }, |
| { |
| .comment = "digital audio capture", |
| .f_ops = &snd_pcm_f_ops_capture, |
| } |
| }; |