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-rw-r--r--sound/core/pcm_native.c3364
1 files changed, 3364 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
new file mode 100644
index 000000000000..cad9bbde9986
--- /dev/null
+++ b/sound/core/pcm_native.c
@@ -0,0 +1,3364 @@
+/*
+ * 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;
+}
+
+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(&params, _params, sizeof(params)))
+ return -EFAULT;
+ err = snd_pcm_sw_params(substream, &params);
+ if (copy_to_user(_params, &params, 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
+ *
+ * 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
+ *
+ * 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
+ *
+ * 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_MPAUSE, &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
+ *
+ * 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
+ *
+ * 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_MCONTINUE, &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
+ */
+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;
+
+ down_read(&snd_pcm_link_rwsem);
+ 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;
+ }
+
+ /* allocate temporary record for drain sync */
+ if (snd_pcm_stream_linked(substream)) {
+ drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
+ if (! drec) {
+ result = -ENOMEM;
+ goto _unlock;
+ }
+ } else
+ drec = &drec_tmp;
+
+ 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)
+ goto _end;
+
+ /* check streams with PLAYBACK & DRAINING */
+ 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 (runtime->status->state != SNDRV_PCM_STATE_DRAINING) {
+ runtime->status->state = SNDRV_PCM_STATE_SETUP;
+ continue;
+ }
+ 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;
+ }
+ }
+
+ if (! num_drecs)
+ goto _end;
+
+ for (;;) {
+ long tout;
+ if (signal_pending(current)) {
+ result = -ERESTARTSYS;
+ break;
+ }
+ 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;
+ }
+ /* 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;
+ }
+ 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;
+ }
+
+ _end:
+ snd_pcm_stream_unlock_irq(substream);
+ if (drec != &drec_tmp)
+ kfree(drec);
+ _unlock:
+ snd_power_unlock(card);
+ up_read(&snd_pcm_link_rwsem);
+
+ 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->open_flag) {
+ if (substream->ops->hw_free != NULL)
+ substream->ops->hw_free(substream);
+ substream->ops->close(substream);
+ substream->open_flag = 0;
+ }
+ 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 = kcalloc(1, 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->open_flag = 1;
+
+ err = snd_pcm_hw_constraints_complete(substream);
+ if (err < 0) {
+ snd_printd("snd_pcm_hw_constraints_complete failed\n");
+ substream->ops->close(substream);
+ snd_pcm_release_file(pcm_file);
+ return err;
+ }
+
+ substream->ffile = file;
+
+ 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;
+
+ snd_runtime_check(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);
+ if (!PageReserved(page))
+ 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);
+ if (!PageReserved(page))
+ 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);
+ }
+ if (!PageReserved(page))
+ 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,
+ }
+};
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