M7350/kernel/arch/arm/mach-msm/qdsp6v2/audio_utils_aio.c

1469 lines
40 KiB
C
Raw Normal View History

2024-09-09 08:52:07 +00:00
/* Copyright (C) 2008 Google, Inc.
* Copyright (C) 2008 HTC Corporation
* Copyright (c) 2009-2013, The Linux Foundation. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/uaccess.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/atomic.h>
#include <asm/ioctls.h>
#include <linux/debugfs.h>
#include <linux/msm_audio_ion.h>
#include "audio_utils_aio.h"
#ifdef CONFIG_USE_DEV_CTRL_VOLUME
#include <mach/qdsp6v2/audio_dev_ctl.h>
#endif /*CONFIG_USE_DEV_CTRL_VOLUME*/
#ifdef CONFIG_DEBUG_FS
ssize_t audio_aio_debug_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
ssize_t audio_aio_debug_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
const int debug_bufmax = 4096;
static char buffer[4096];
int n = 0;
struct q6audio_aio *audio = file->private_data;
mutex_lock(&audio->lock);
n = scnprintf(buffer, debug_bufmax, "opened %d\n", audio->opened);
n += scnprintf(buffer + n, debug_bufmax - n,
"enabled %d\n", audio->enabled);
n += scnprintf(buffer + n, debug_bufmax - n,
"stopped %d\n", audio->stopped);
n += scnprintf(buffer + n, debug_bufmax - n,
"feedback %d\n", audio->feedback);
mutex_unlock(&audio->lock);
/* Following variables are only useful for debugging when
* when playback halts unexpectedly. Thus, no mutual exclusion
* enforced
*/
n += scnprintf(buffer + n, debug_bufmax - n,
"wflush %d\n", audio->wflush);
n += scnprintf(buffer + n, debug_bufmax - n,
"rflush %d\n", audio->rflush);
n += scnprintf(buffer + n, debug_bufmax - n,
"inqueue empty %d\n", list_empty(&audio->in_queue));
n += scnprintf(buffer + n, debug_bufmax - n,
"outqueue empty %d\n", list_empty(&audio->out_queue));
buffer[n] = 0;
return simple_read_from_buffer(buf, count, ppos, buffer, n);
}
#endif
int insert_eos_buf(struct q6audio_aio *audio,
struct audio_aio_buffer_node *buf_node)
{
struct dec_meta_out *eos_buf = buf_node->kvaddr;
pr_debug("%s[%p]:insert_eos_buf\n", __func__, audio);
eos_buf->num_of_frames = 0xFFFFFFFF;
eos_buf->meta_out_dsp[0].offset_to_frame = 0x0;
eos_buf->meta_out_dsp[0].nflags = AUDIO_DEC_EOS_SET;
return sizeof(struct dec_meta_out) +
sizeof(eos_buf->meta_out_dsp[0]);
}
/* Routine which updates read buffers of driver/dsp,
for flush operation as DSP output might not have proper
value set */
static int insert_meta_data_flush(struct q6audio_aio *audio,
struct audio_aio_buffer_node *buf_node)
{
struct dec_meta_out *meta_data = buf_node->kvaddr;
meta_data->num_of_frames = 0x0;
meta_data->meta_out_dsp[0].offset_to_frame = 0x0;
meta_data->meta_out_dsp[0].nflags = 0x0;
return sizeof(struct dec_meta_out) +
sizeof(meta_data->meta_out_dsp[0]);
}
static int audio_aio_ion_lookup_vaddr(struct q6audio_aio *audio, void *addr,
unsigned long len,
struct audio_aio_ion_region **region)
{
struct audio_aio_ion_region *region_elt;
int match_count = 0;
*region = NULL;
/* returns physical address or zero */
list_for_each_entry(region_elt, &audio->ion_region_queue, list) {
if (addr >= region_elt->vaddr &&
addr < region_elt->vaddr + region_elt->len &&
addr + len <= region_elt->vaddr + region_elt->len) {
/* offset since we could pass vaddr inside a registerd
* ion buffer
*/
match_count++;
if (!*region)
*region = region_elt;
}
}
if (match_count > 1) {
pr_err("%s[%p]:multiple hits for vaddr %p, len %ld\n",
__func__, audio, addr, len);
list_for_each_entry(region_elt, &audio->ion_region_queue,
list) {
if (addr >= region_elt->vaddr &&
addr < region_elt->vaddr + region_elt->len &&
addr + len <= region_elt->vaddr + region_elt->len)
pr_err("\t%s[%p]:%p, %ld --> %p\n",
__func__, audio,
region_elt->vaddr,
region_elt->len,
(void *)region_elt->paddr);
}
}
return *region ? 0 : -1;
}
static unsigned long audio_aio_ion_fixup(struct q6audio_aio *audio, void *addr,
unsigned long len, int ref_up, void **kvaddr)
{
struct audio_aio_ion_region *region;
unsigned long paddr;
int ret;
ret = audio_aio_ion_lookup_vaddr(audio, addr, len, &region);
if (ret) {
pr_err("%s[%p]:lookup (%p, %ld) failed\n",
__func__, audio, addr, len);
return 0;
}
if (ref_up)
region->ref_cnt++;
else
region->ref_cnt--;
pr_debug("%s[%p]:found region %p ref_cnt %d\n",
__func__, audio, region, region->ref_cnt);
paddr = region->paddr + (addr - region->vaddr);
/* provide kernel virtual address for accessing meta information */
if (kvaddr)
*kvaddr = (void *) (region->kvaddr + (addr - region->vaddr));
return paddr;
}
static int audio_aio_pause(struct q6audio_aio *audio)
{
int rc = -EINVAL;
pr_debug("%s[%p], enabled = %d\n", __func__, audio,
audio->enabled);
if (audio->enabled) {
rc = q6asm_cmd(audio->ac, CMD_PAUSE);
if (rc < 0)
pr_err("%s[%p]: pause cmd failed rc=%d\n",
__func__, audio, rc);
} else
pr_err("%s[%p]: Driver not enabled\n", __func__, audio);
return rc;
}
static int audio_aio_flush(struct q6audio_aio *audio)
{
int rc;
if (audio->enabled) {
/* Implicitly issue a pause to the decoder before flushing if
it is not in pause state */
if (!(audio->drv_status & ADRV_STATUS_PAUSE)) {
rc = audio_aio_pause(audio);
if (rc < 0)
pr_err("%s[%p}: pause cmd failed rc=%d\n",
__func__, audio,
rc);
else
audio->drv_status |= ADRV_STATUS_PAUSE;
}
rc = q6asm_cmd(audio->ac, CMD_FLUSH);
if (rc < 0)
pr_err("%s[%p]: flush cmd failed rc=%d\n",
__func__, audio, rc);
/* Not in stop state, reenable the stream */
if (audio->stopped == 0) {
rc = audio_aio_enable(audio);
if (rc)
pr_err("%s[%p]:audio re-enable failed\n",
__func__, audio);
else {
audio->enabled = 1;
if (audio->drv_status & ADRV_STATUS_PAUSE)
audio->drv_status &= ~ADRV_STATUS_PAUSE;
}
}
}
pr_debug("%s[%p]:in_bytes %d\n",
__func__, audio, atomic_read(&audio->in_bytes));
pr_debug("%s[%p]:in_samples %d\n",
__func__, audio, atomic_read(&audio->in_samples));
atomic_set(&audio->in_bytes, 0);
atomic_set(&audio->in_samples, 0);
return 0;
}
static int audio_aio_outport_flush(struct q6audio_aio *audio)
{
int rc;
rc = q6asm_cmd(audio->ac, CMD_OUT_FLUSH);
if (rc < 0)
pr_err("%s[%p}: output port flush cmd failed rc=%d\n",
__func__, audio, rc);
return rc;
}
/* Write buffer to DSP / Handle Ack from DSP */
void audio_aio_async_write_ack(struct q6audio_aio *audio, uint32_t token,
uint32_t *payload)
{
unsigned long flags;
union msm_audio_event_payload event_payload;
struct audio_aio_buffer_node *used_buf;
/* No active flush in progress */
if (audio->wflush)
return;
spin_lock_irqsave(&audio->dsp_lock, flags);
BUG_ON(list_empty(&audio->out_queue));
used_buf = list_first_entry(&audio->out_queue,
struct audio_aio_buffer_node, list);
if (token == used_buf->token) {
list_del(&used_buf->list);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
pr_debug("%s[%p]:consumed buffer\n", __func__, audio);
event_payload.aio_buf = used_buf->buf;
audio_aio_post_event(audio, AUDIO_EVENT_WRITE_DONE,
event_payload);
kfree(used_buf);
if (list_empty(&audio->out_queue) &&
(audio->drv_status & ADRV_STATUS_FSYNC)) {
pr_debug("%s[%p]: list is empty, reached EOS in Tunnel\n",
__func__, audio);
wake_up(&audio->write_wait);
}
} else {
pr_err("%s[%p]:expected=%lx ret=%x\n",
__func__, audio, used_buf->token, token);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
}
}
/* ------------------- device --------------------- */
void audio_aio_async_out_flush(struct q6audio_aio *audio)
{
struct audio_aio_buffer_node *buf_node;
struct list_head *ptr, *next;
union msm_audio_event_payload payload;
unsigned long flags;
pr_debug("%s[%p}\n", __func__, audio);
/* EOS followed by flush, EOS response not guranteed, free EOS i/p
buffer */
spin_lock_irqsave(&audio->dsp_lock, flags);
if (audio->eos_flag && (audio->eos_write_payload.aio_buf.buf_addr)) {
pr_debug("%s[%p]: EOS followed by flush received,acknowledge"\
" eos i/p buffer immediately\n", __func__, audio);
audio_aio_post_event(audio, AUDIO_EVENT_WRITE_DONE,
audio->eos_write_payload);
memset(&audio->eos_write_payload , 0,
sizeof(union msm_audio_event_payload));
}
spin_unlock_irqrestore(&audio->dsp_lock, flags);
list_for_each_safe(ptr, next, &audio->out_queue) {
buf_node = list_entry(ptr, struct audio_aio_buffer_node, list);
list_del(&buf_node->list);
payload.aio_buf = buf_node->buf;
audio_aio_post_event(audio, AUDIO_EVENT_WRITE_DONE, payload);
kfree(buf_node);
pr_debug("%s[%p]: Propagate WRITE_DONE during flush\n",
__func__, audio);
}
}
void audio_aio_async_in_flush(struct q6audio_aio *audio)
{
struct audio_aio_buffer_node *buf_node;
struct list_head *ptr, *next;
union msm_audio_event_payload payload;
pr_debug("%s[%p]\n", __func__, audio);
list_for_each_safe(ptr, next, &audio->in_queue) {
buf_node = list_entry(ptr, struct audio_aio_buffer_node, list);
list_del(&buf_node->list);
/* Forcefull send o/p eos buffer after flush, if no eos response
* received by dsp even after sending eos command */
if ((audio->eos_rsp != 1) && audio->eos_flag) {
pr_debug("%s[%p]: send eos on o/p buffer during flush\n",
__func__, audio);
payload.aio_buf = buf_node->buf;
payload.aio_buf.data_len =
insert_eos_buf(audio, buf_node);
audio->eos_flag = 0;
} else {
payload.aio_buf = buf_node->buf;
payload.aio_buf.data_len =
insert_meta_data_flush(audio, buf_node);
}
audio_aio_post_event(audio, AUDIO_EVENT_READ_DONE, payload);
kfree(buf_node);
pr_debug("%s[%p]: Propagate READ_DONE during flush\n",
__func__, audio);
}
}
int audio_aio_enable(struct q6audio_aio *audio)
{
/* 2nd arg: 0 -> run immediately
3rd arg: 0 -> msw_ts, 4th arg: 0 ->lsw_ts */
return q6asm_run(audio->ac, 0x00, 0x00, 0x00);
}
int audio_aio_disable(struct q6audio_aio *audio)
{
int rc = 0;
if (audio->opened) {
audio->enabled = 0;
audio->opened = 0;
pr_debug("%s[%p]: inbytes[%d] insamples[%d]\n", __func__,
audio, atomic_read(&audio->in_bytes),
atomic_read(&audio->in_samples));
/* Close the session */
rc = q6asm_cmd(audio->ac, CMD_CLOSE);
if (rc < 0)
pr_err("%s[%p]:Failed to close the session rc=%d\n",
__func__, audio, rc);
audio->stopped = 1;
wake_up(&audio->write_wait);
wake_up(&audio->cmd_wait);
}
pr_debug("%s[%p]:enabled[%d]\n", __func__, audio, audio->enabled);
return rc;
}
void audio_aio_reset_ion_region(struct q6audio_aio *audio)
{
struct audio_aio_ion_region *region;
struct list_head *ptr, *next;
list_for_each_safe(ptr, next, &audio->ion_region_queue) {
region = list_entry(ptr, struct audio_aio_ion_region, list);
list_del(&region->list);
msm_audio_ion_free_legacy(audio->client, region->handle);
kfree(region);
}
return;
}
void audio_aio_reset_event_queue(struct q6audio_aio *audio)
{
unsigned long flags;
struct audio_aio_event *drv_evt;
struct list_head *ptr, *next;
spin_lock_irqsave(&audio->event_queue_lock, flags);
list_for_each_safe(ptr, next, &audio->event_queue) {
drv_evt = list_first_entry(&audio->event_queue,
struct audio_aio_event, list);
list_del(&drv_evt->list);
kfree(drv_evt);
}
list_for_each_safe(ptr, next, &audio->free_event_queue) {
drv_evt = list_first_entry(&audio->free_event_queue,
struct audio_aio_event, list);
list_del(&drv_evt->list);
kfree(drv_evt);
}
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
return;
}
static void audio_aio_unmap_ion_region(struct q6audio_aio *audio)
{
struct audio_aio_ion_region *region;
struct list_head *ptr, *next;
int rc = -EINVAL;
pr_debug("%s[%p]:\n", __func__, audio);
list_for_each_safe(ptr, next, &audio->ion_region_queue) {
region = list_entry(ptr, struct audio_aio_ion_region, list);
pr_debug("%s[%p]: phy_address = 0x%lx\n",
__func__, audio, region->paddr);
if (region != NULL) {
rc = q6asm_memory_unmap(audio->ac,
(uint32_t)region->paddr, IN);
if (rc < 0)
pr_err("%s[%p]: memory unmap failed\n",
__func__, audio);
}
}
}
#ifdef CONFIG_USE_DEV_CTRL_VOLUME
static void audio_aio_listner(u32 evt_id, union auddev_evt_data *evt_payload,
void *private_data)
{
struct q6audio_aio *audio = (struct q6audio_aio *) private_data;
int rc = 0;
switch (evt_id) {
case AUDDEV_EVT_STREAM_VOL_CHG:
audio->volume = evt_payload->session_vol;
pr_debug("%s[%p]: AUDDEV_EVT_STREAM_VOL_CHG, stream vol %d, enabled = %d\n",
__func__, audio, audio->volume, audio->enabled);
if (audio->enabled == 1) {
if (audio->ac) {
rc = q6asm_set_volume(audio->ac, audio->volume);
if (rc < 0) {
pr_err("%s[%p]: Send Volume command failed rc=%d\n",
__func__, audio, rc);
}
}
}
break;
default:
pr_err("%s[%p]:ERROR:wrong event\n", __func__, audio);
break;
}
}
int register_volume_listener(struct q6audio_aio *audio)
{
int rc = 0;
audio->device_events = AUDDEV_EVT_STREAM_VOL_CHG;
audio->drv_status &= ~ADRV_STATUS_PAUSE;
rc = auddev_register_evt_listner(audio->device_events,
AUDDEV_CLNT_DEC,
audio->ac->session,
audio_aio_listner,
(void *)audio);
if (rc < 0) {
pr_err("%s[%p]: Event listener failed\n", __func__, audio);
rc = -EACCES;
}
return rc;
}
void unregister_volume_listener(struct q6audio_aio *audio)
{
auddev_unregister_evt_listner(AUDDEV_CLNT_DEC, audio->ac->session);
}
int enable_volume_ramp(struct q6audio_aio *audio)
{
int rc = 0;
struct asm_softpause_params softpause;
struct asm_softvolume_params softvol;
if (audio->ac == NULL)
return -EINVAL;
pr_debug("%s[%p]\n", __func__, audio);
softpause.enable = SOFT_PAUSE_ENABLE;
softpause.period = SOFT_PAUSE_PERIOD;
softpause.step = SOFT_PAUSE_STEP;
softpause.rampingcurve = SOFT_PAUSE_CURVE_LINEAR;
softvol.period = SOFT_VOLUME_PERIOD;
softvol.step = SOFT_VOLUME_STEP;
softvol.rampingcurve = SOFT_VOLUME_CURVE_LINEAR;
if (softpause.rampingcurve == SOFT_PAUSE_CURVE_LINEAR)
softpause.step = SOFT_PAUSE_STEP_LINEAR;
if (softvol.rampingcurve == SOFT_VOLUME_CURVE_LINEAR)
softvol.step = SOFT_VOLUME_STEP_LINEAR;
rc = q6asm_set_volume(audio->ac, audio->volume);
if (rc < 0) {
pr_err("%s: Send Volume command failed rc=%d\n",
__func__, rc);
return rc;
}
rc = q6asm_set_softpause(audio->ac, &softpause);
if (rc < 0) {
pr_err("%s: Send SoftPause Param failed rc=%d\n",
__func__, rc);
return rc;
}
rc = q6asm_set_softvolume(audio->ac, &softvol);
if (rc < 0) {
pr_err("%s: Send SoftVolume Param failed rc=%d\n",
__func__, rc);
return rc;
}
/* disable mute by default */
rc = q6asm_set_mute(audio->ac, 0);
if (rc < 0) {
pr_err("%s: Send mute command failed rc=%d\n",
__func__, rc);
return rc;
}
return rc;
}
#else /*CONFIG_USE_DEV_CTRL_VOLUME*/
int register_volume_listener(struct q6audio_aio *audio)
{
return 0;/* do nothing */
}
void unregister_volume_listener(struct q6audio_aio *audio)
{
return;/* do nothing */
}
int enable_volume_ramp(struct q6audio_aio *audio)
{
return 0; /* do nothing */
}
#endif /*CONFIG_USE_DEV_CTRL_VOLUME*/
int audio_aio_release(struct inode *inode, struct file *file)
{
struct q6audio_aio *audio = file->private_data;
pr_debug("%s[%p]\n", __func__, audio);
mutex_lock(&audio->lock);
audio->wflush = 1;
if (audio->enabled)
audio_aio_flush(audio);
audio->wflush = 0;
audio->drv_ops.out_flush(audio);
audio->drv_ops.in_flush(audio);
audio_aio_disable(audio);
audio_aio_unmap_ion_region(audio);
audio_aio_reset_ion_region(audio);
msm_audio_ion_client_destroy(audio->client);
audio->event_abort = 1;
wake_up(&audio->event_wait);
audio_aio_reset_event_queue(audio);
q6asm_audio_client_free(audio->ac);
mutex_unlock(&audio->lock);
mutex_destroy(&audio->lock);
mutex_destroy(&audio->read_lock);
mutex_destroy(&audio->write_lock);
mutex_destroy(&audio->get_event_lock);
unregister_volume_listener(audio);
#ifdef CONFIG_DEBUG_FS
if (audio->dentry)
debugfs_remove(audio->dentry);
#endif
kfree(audio->codec_cfg);
kfree(audio);
return 0;
}
int audio_aio_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
int rc = 0;
struct q6audio_aio *audio = file->private_data;
if (!audio->enabled || audio->feedback)
return -EINVAL;
/* Blocking client sends more data */
mutex_lock(&audio->lock);
audio->drv_status |= ADRV_STATUS_FSYNC;
mutex_unlock(&audio->lock);
pr_debug("%s[%p]:\n", __func__, audio);
audio->eos_rsp = 0;
pr_debug("%s[%p]Wait for write done from DSP\n", __func__, audio);
rc = wait_event_interruptible(audio->write_wait,
(list_empty(&audio->out_queue)) ||
audio->wflush || audio->stopped);
if (audio->stopped || audio->wflush) {
pr_debug("%s[%p]: Audio Flushed or Stopped,this is not EOS\n"
, __func__, audio);
audio->wflush = 0;
rc = -EBUSY;
}
if (rc < 0) {
pr_err("%s[%p]: wait event for list_empty failed, rc = %d\n",
__func__, audio, rc);
goto done;
}
rc = q6asm_cmd(audio->ac, CMD_EOS);
pr_debug("%s[%p]: EOS cmd sent to DSP\n", __func__, audio);
if (rc < 0)
pr_err("%s[%p]: q6asm_cmd failed, rc = %d",
__func__, audio, rc);
pr_debug("%s[%p]: wait for RENDERED_EOS from DSP\n"
, __func__, audio);
rc = wait_event_interruptible(audio->write_wait,
(audio->eos_rsp || audio->wflush ||
audio->stopped));
if (rc < 0) {
pr_err("%s[%p]: wait event for eos_rsp failed, rc = %d\n",
__func__, audio, rc);
goto done;
}
if (audio->stopped || audio->wflush) {
audio->wflush = 0;
pr_debug("%s[%p]: Audio Flushed or Stopped,this is not EOS\n"
, __func__, audio);
rc = -EBUSY;
}
if (audio->eos_rsp == 1)
pr_debug("%s[%p]: EOS\n", __func__, audio);
done:
mutex_lock(&audio->lock);
audio->drv_status &= ~ADRV_STATUS_FSYNC;
mutex_unlock(&audio->lock);
return rc;
}
static int audio_aio_events_pending(struct q6audio_aio *audio)
{
unsigned long flags;
int empty;
spin_lock_irqsave(&audio->event_queue_lock, flags);
empty = !list_empty(&audio->event_queue);
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
return empty || audio->event_abort;
}
static long audio_aio_process_event_req(struct q6audio_aio *audio,
void __user *arg)
{
long rc;
struct msm_audio_event usr_evt;
struct audio_aio_event *drv_evt = NULL;
int timeout;
unsigned long flags;
if (copy_from_user(&usr_evt, arg, sizeof(struct msm_audio_event)))
return -EFAULT;
timeout = (int)usr_evt.timeout_ms;
if (timeout > 0) {
rc = wait_event_interruptible_timeout(audio->event_wait,
audio_aio_events_pending
(audio),
msecs_to_jiffies
(timeout));
if (rc == 0)
return -ETIMEDOUT;
} else {
rc = wait_event_interruptible(audio->event_wait,
audio_aio_events_pending(audio));
}
if (rc < 0)
return rc;
if (audio->event_abort) {
audio->event_abort = 0;
return -ENODEV;
}
rc = 0;
spin_lock_irqsave(&audio->event_queue_lock, flags);
if (!list_empty(&audio->event_queue)) {
drv_evt = list_first_entry(&audio->event_queue,
struct audio_aio_event, list);
list_del(&drv_evt->list);
}
if (drv_evt) {
usr_evt.event_type = drv_evt->event_type;
usr_evt.event_payload = drv_evt->payload;
list_add_tail(&drv_evt->list, &audio->free_event_queue);
} else {
pr_err("%s[%p]:Unexpected path\n", __func__, audio);
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
return -EPERM;
}
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
if (drv_evt->event_type == AUDIO_EVENT_WRITE_DONE) {
pr_debug("%s[%p]:posted AUDIO_EVENT_WRITE_DONE to user\n",
__func__, audio);
mutex_lock(&audio->write_lock);
audio_aio_ion_fixup(audio, drv_evt->payload.aio_buf.buf_addr,
drv_evt->payload.aio_buf.buf_len, 0, 0);
mutex_unlock(&audio->write_lock);
} else if (drv_evt->event_type == AUDIO_EVENT_READ_DONE) {
pr_debug("%s[%p]:posted AUDIO_EVENT_READ_DONE to user\n",
__func__, audio);
mutex_lock(&audio->read_lock);
audio_aio_ion_fixup(audio, drv_evt->payload.aio_buf.buf_addr,
drv_evt->payload.aio_buf.buf_len, 0, 0);
mutex_unlock(&audio->read_lock);
}
/* Some read buffer might be held up in DSP,release all
* Once EOS indicated
*/
if (audio->eos_rsp && !list_empty(&audio->in_queue)) {
pr_debug("%s[%p]:Send flush command to release read buffers"\
" held up in DSP\n", __func__, audio);
audio_aio_flush(audio);
}
if (copy_to_user(arg, &usr_evt, sizeof(usr_evt)))
rc = -EFAULT;
return rc;
}
static int audio_aio_ion_check(struct q6audio_aio *audio,
void *vaddr, unsigned long len)
{
struct audio_aio_ion_region *region_elt;
struct audio_aio_ion_region t = {.vaddr = vaddr, .len = len };
list_for_each_entry(region_elt, &audio->ion_region_queue, list) {
if (CONTAINS(region_elt, &t) || CONTAINS(&t, region_elt) ||
OVERLAPS(region_elt, &t)) {
pr_err("%s[%p]:region (vaddr %p len %ld) clashes with registered region (vaddr %p paddr %p len %ld)\n",
__func__, audio, vaddr, len,
region_elt->vaddr,
(void *)region_elt->paddr, region_elt->len);
return -EINVAL;
}
}
return 0;
}
static int audio_aio_ion_add(struct q6audio_aio *audio,
struct msm_audio_ion_info *info)
{
ion_phys_addr_t paddr = 0;
size_t len = 0;
struct audio_aio_ion_region *region;
int rc = -EINVAL;
struct ion_handle *handle = NULL;
unsigned long ionflag;
void *kvaddr = NULL;
pr_debug("%s[%p]:\n", __func__, audio);
region = kmalloc(sizeof(*region), GFP_KERNEL);
if (!region) {
rc = -ENOMEM;
goto end;
}
rc = msm_audio_ion_import_legacy("Audio_Dec_Client", audio->client,
&handle, info->fd, &ionflag,
0, &paddr, &len, &kvaddr);
if (rc) {
pr_err("%s: msm audio ion alloc failed\n", __func__);
goto import_error;
}
rc = audio_aio_ion_check(audio, info->vaddr, len);
if (rc < 0) {
pr_err("%s: audio_aio_ion_check failed\n", __func__);
goto ion_error;
}
region->handle = handle;
region->vaddr = info->vaddr;
region->fd = info->fd;
region->paddr = paddr;
region->kvaddr = (unsigned long)kvaddr;
region->len = len;
region->ref_cnt = 0;
pr_debug("%s[%p]:add region paddr %lx vaddr %p, len %lu kvaddr %lx\n",
__func__, audio,
region->paddr, region->vaddr, region->len, region->kvaddr);
list_add_tail(&region->list, &audio->ion_region_queue);
rc = q6asm_memory_map(audio->ac, (uint32_t) paddr, IN, (uint32_t) len,
1);
if (rc < 0) {
pr_err("%s[%p]: memory map failed\n", __func__, audio);
goto mmap_error;
} else {
goto end;
}
mmap_error:
list_del(&region->list);
ion_error:
msm_audio_ion_free_legacy(audio->client, handle);
import_error:
kfree(region);
end:
return rc;
}
static int audio_aio_ion_remove(struct q6audio_aio *audio,
struct msm_audio_ion_info *info)
{
struct audio_aio_ion_region *region;
struct list_head *ptr, *next;
int rc = -EINVAL;
pr_debug("%s[%p]:info fd %d vaddr %p\n",
__func__, audio, info->fd, info->vaddr);
list_for_each_safe(ptr, next, &audio->ion_region_queue) {
region = list_entry(ptr, struct audio_aio_ion_region, list);
if ((region->fd == info->fd) &&
(region->vaddr == info->vaddr)) {
if (region->ref_cnt) {
pr_debug("%s[%p]:region %p in use ref_cnt %d\n",
__func__, audio, region,
region->ref_cnt);
break;
}
pr_debug("%s[%p]:remove region fd %d vaddr %p\n",
__func__, audio, info->fd, info->vaddr);
rc = q6asm_memory_unmap(audio->ac,
(uint32_t) region->paddr, IN);
if (rc < 0)
pr_err("%s[%p]: memory unmap failed\n",
__func__, audio);
list_del(&region->list);
msm_audio_ion_free_legacy(audio->client,
region->handle);
kfree(region);
rc = 0;
break;
}
}
return rc;
}
static void audio_aio_async_write(struct q6audio_aio *audio,
struct audio_aio_buffer_node *buf_node)
{
int rc;
struct audio_client *ac;
struct audio_aio_write_param param;
if (!audio || !buf_node) {
pr_err("%s NULL pointer audio=[0x%p], buf_node=[0x%p]\n",
__func__, audio, buf_node);
return;
}
pr_debug("%s[%p]: Send write buff %p phy %lx len %d meta_enable = %d\n",
__func__, audio, buf_node, buf_node->paddr,
buf_node->buf.data_len,
audio->buf_cfg.meta_info_enable);
pr_debug("%s[%p]: flags = 0x%x\n", __func__, audio,
buf_node->meta_info.meta_in.nflags);
ac = audio->ac;
/* Offset with appropriate meta */
if (audio->feedback) {
/* Non Tunnel mode */
param.paddr = buf_node->paddr + sizeof(struct dec_meta_in);
param.len = buf_node->buf.data_len - sizeof(struct dec_meta_in);
} else {
/* Tunnel mode */
param.paddr = buf_node->paddr;
param.len = buf_node->buf.data_len;
}
param.msw_ts = buf_node->meta_info.meta_in.ntimestamp.highpart;
param.lsw_ts = buf_node->meta_info.meta_in.ntimestamp.lowpart;
param.flags = buf_node->meta_info.meta_in.nflags;
/* If no meta_info enaled, indicate no time stamp valid */
if (!audio->buf_cfg.meta_info_enable)
param.flags = 0xFF00;
if (buf_node->meta_info.meta_in.nflags & AUDIO_DEC_EOF_SET)
param.flags |= AUDIO_DEC_EOF_SET;
param.uid = param.paddr;
/* Read command will populate paddr as token */
buf_node->token = param.paddr;
rc = q6asm_async_write(ac, &param);
if (rc < 0)
pr_err("%s[%p]:failed\n", __func__, audio);
}
void audio_aio_post_event(struct q6audio_aio *audio, int type,
union msm_audio_event_payload payload)
{
struct audio_aio_event *e_node = NULL;
unsigned long flags;
spin_lock_irqsave(&audio->event_queue_lock, flags);
if (!list_empty(&audio->free_event_queue)) {
e_node = list_first_entry(&audio->free_event_queue,
struct audio_aio_event, list);
list_del(&e_node->list);
} else {
e_node = kmalloc(sizeof(struct audio_aio_event), GFP_ATOMIC);
if (!e_node) {
pr_err("%s[%p]:No mem to post event %d\n",
__func__, audio, type);
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
return;
}
}
e_node->event_type = type;
e_node->payload = payload;
list_add_tail(&e_node->list, &audio->event_queue);
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
wake_up(&audio->event_wait);
}
static void audio_aio_async_read(struct q6audio_aio *audio,
struct audio_aio_buffer_node *buf_node)
{
struct audio_client *ac;
struct audio_aio_read_param param;
int rc;
pr_debug("%s[%p]: Send read buff %p phy %lx len %d\n",
__func__, audio, buf_node,
buf_node->paddr, buf_node->buf.buf_len);
ac = audio->ac;
/* Provide address so driver can append nr frames information */
param.paddr = buf_node->paddr +
sizeof(struct dec_meta_out);
param.len = buf_node->buf.buf_len -
sizeof(struct dec_meta_out);
param.uid = param.paddr;
/* Write command will populate paddr as token */
buf_node->token = param.paddr;
rc = q6asm_async_read(ac, &param);
if (rc < 0)
pr_err("%s[%p]:failed\n", __func__, audio);
}
static int audio_aio_buf_add(struct q6audio_aio *audio, unsigned dir,
void __user *arg)
{
unsigned long flags;
struct audio_aio_buffer_node *buf_node;
buf_node = kzalloc(sizeof(*buf_node), GFP_KERNEL);
if (!buf_node)
return -ENOMEM;
if (copy_from_user(&buf_node->buf, arg, sizeof(buf_node->buf))) {
kfree(buf_node);
return -EFAULT;
}
pr_debug("%s[%p]:node %p dir %x buf_addr %p buf_len %d data_len %d\n",
__func__, audio, buf_node, dir, buf_node->buf.buf_addr,
buf_node->buf.buf_len, buf_node->buf.data_len);
buf_node->paddr = audio_aio_ion_fixup(audio, buf_node->buf.buf_addr,
buf_node->buf.buf_len, 1,
&buf_node->kvaddr);
if (dir) {
/* write */
if (!buf_node->paddr ||
(buf_node->paddr & 0x1) ||
(!audio->feedback && !buf_node->buf.data_len)) {
kfree(buf_node);
return -EINVAL;
}
extract_meta_out_info(audio, buf_node, 1);
/* Not a EOS buffer */
if (!(buf_node->meta_info.meta_in.nflags & AUDIO_DEC_EOS_SET)) {
spin_lock_irqsave(&audio->dsp_lock, flags);
audio_aio_async_write(audio, buf_node);
/* EOS buffer handled in driver */
list_add_tail(&buf_node->list, &audio->out_queue);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
} else if (buf_node->meta_info.meta_in.nflags
& AUDIO_DEC_EOS_SET) {
if (!audio->wflush) {
pr_debug("%s[%p]:Send EOS cmd at i/p\n",
__func__, audio);
/* Driver will forcefully post writedone event
* once eos ack recived from DSP
*/
audio->eos_write_payload.aio_buf =\
buf_node->buf;
audio->eos_flag = 1;
audio->eos_rsp = 0;
q6asm_cmd(audio->ac, CMD_EOS);
kfree(buf_node);
} else { /* Flush in progress, send back i/p
* EOS buffer as is
*/
union msm_audio_event_payload event_payload;
event_payload.aio_buf = buf_node->buf;
audio_aio_post_event(audio,
AUDIO_EVENT_WRITE_DONE,
event_payload);
kfree(buf_node);
}
}
} else {
/* read */
if (!buf_node->paddr ||
(buf_node->paddr & 0x1) ||
(buf_node->buf.buf_len < PCM_BUFSZ_MIN)) {
kfree(buf_node);
return -EINVAL;
}
/* No EOS reached */
if (!audio->eos_rsp) {
spin_lock_irqsave(&audio->dsp_lock, flags);
audio_aio_async_read(audio, buf_node);
/* EOS buffer handled in driver */
list_add_tail(&buf_node->list, &audio->in_queue);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
}
/* EOS reached at input side fake all upcoming read buffer to
* indicate the same
*/
else {
union msm_audio_event_payload event_payload;
event_payload.aio_buf = buf_node->buf;
event_payload.aio_buf.data_len =
insert_eos_buf(audio, buf_node);
pr_debug("%s[%p]: propagate READ_DONE as EOS done\n",\
__func__, audio);
audio_aio_post_event(audio, AUDIO_EVENT_READ_DONE,
event_payload);
kfree(buf_node);
}
}
return 0;
}
void audio_aio_ioport_reset(struct q6audio_aio *audio)
{
if (audio->drv_status & ADRV_STATUS_AIO_INTF) {
/* If fsync is in progress, make sure
* return value of fsync indicates
* abort due to flush
*/
if (audio->drv_status & ADRV_STATUS_FSYNC) {
pr_debug("%s[%p]:fsync in progress\n", __func__, audio);
audio->drv_ops.out_flush(audio);
} else
audio->drv_ops.out_flush(audio);
if (audio->feedback == NON_TUNNEL_MODE)
audio->drv_ops.in_flush(audio);
}
}
int audio_aio_open(struct q6audio_aio *audio, struct file *file)
{
int rc = 0;
int i;
struct audio_aio_event *e_node = NULL;
struct list_head *ptr, *next;
/* Settings will be re-config at AUDIO_SET_CONFIG,
* but at least we need to have initial config
*/
audio->str_cfg.buffer_size = FRAME_SIZE;
audio->str_cfg.buffer_count = FRAME_NUM;
audio->pcm_cfg.buffer_count = PCM_BUF_COUNT;
audio->pcm_cfg.sample_rate = 48000;
audio->pcm_cfg.channel_count = 2;
/* Only AIO interface */
if (file->f_flags & O_NONBLOCK) {
pr_debug("%s[%p]:set to aio interface\n", __func__, audio);
audio->drv_status |= ADRV_STATUS_AIO_INTF;
audio->drv_ops.out_flush = audio_aio_async_out_flush;
audio->drv_ops.in_flush = audio_aio_async_in_flush;
q6asm_set_io_mode(audio->ac, ASYNC_IO_MODE);
} else {
pr_err("%s[%p]:SIO interface not supported\n",
__func__, audio);
rc = -EACCES;
goto fail;
}
/* Initialize all locks of audio instance */
mutex_init(&audio->lock);
mutex_init(&audio->read_lock);
mutex_init(&audio->write_lock);
mutex_init(&audio->get_event_lock);
spin_lock_init(&audio->dsp_lock);
spin_lock_init(&audio->event_queue_lock);
init_waitqueue_head(&audio->cmd_wait);
init_waitqueue_head(&audio->write_wait);
init_waitqueue_head(&audio->event_wait);
INIT_LIST_HEAD(&audio->out_queue);
INIT_LIST_HEAD(&audio->in_queue);
INIT_LIST_HEAD(&audio->ion_region_queue);
INIT_LIST_HEAD(&audio->free_event_queue);
INIT_LIST_HEAD(&audio->event_queue);
audio->drv_ops.out_flush(audio);
audio->opened = 1;
file->private_data = audio;
audio->codec_ioctl = audio_aio_ioctl;
for (i = 0; i < AUDIO_EVENT_NUM; i++) {
e_node = kmalloc(sizeof(struct audio_aio_event), GFP_KERNEL);
if (e_node)
list_add_tail(&e_node->list, &audio->free_event_queue);
else {
pr_err("%s[%p]:event pkt alloc failed\n",
__func__, audio);
rc = -ENOMEM;
goto cleanup;
}
}
audio->client = msm_audio_ion_client_create(UINT_MAX,
"Audio_Dec_Client");
if (IS_ERR_OR_NULL(audio->client)) {
pr_err("Unable to create ION client\n");
rc = -ENOMEM;
goto cleanup;
}
pr_debug("Ion client create in audio_aio_open %p", audio->client);
rc = register_volume_listener(audio);
if (rc < 0)
goto ion_cleanup;
return 0;
ion_cleanup:
msm_audio_ion_client_destroy(audio->client);
audio->client = NULL;
cleanup:
list_for_each_safe(ptr, next, &audio->free_event_queue) {
e_node = list_first_entry(&audio->free_event_queue,
struct audio_aio_event, list);
list_del(&e_node->list);
kfree(e_node);
}
fail:
return rc;
}
long audio_aio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct q6audio_aio *audio = file->private_data;
int rc = 0;
switch (cmd) {
case AUDIO_GET_STATS: {
struct msm_audio_stats stats;
uint64_t timestamp;
stats.byte_count = atomic_read(&audio->in_bytes);
stats.sample_count = atomic_read(&audio->in_samples);
rc = q6asm_get_session_time(audio->ac, &timestamp);
if (rc >= 0)
memcpy(&stats.unused[0], &timestamp, sizeof(timestamp));
else
pr_debug("Error while getting timestamp\n");
if (copy_to_user((void *)arg, &stats, sizeof(stats)))
rc = -EFAULT;
break;
}
case AUDIO_GET_EVENT: {
pr_debug("%s[%p]:AUDIO_GET_EVENT\n", __func__, audio);
if (mutex_trylock(&audio->get_event_lock)) {
rc = audio_aio_process_event_req(audio,
(void __user *)arg);
mutex_unlock(&audio->get_event_lock);
} else
rc = -EBUSY;
break;
}
case AUDIO_ABORT_GET_EVENT: {
audio->event_abort = 1;
wake_up(&audio->event_wait);
break;
}
case AUDIO_ASYNC_WRITE: {
mutex_lock(&audio->write_lock);
if (audio->drv_status & ADRV_STATUS_FSYNC)
rc = -EBUSY;
else {
if (audio->enabled)
rc = audio_aio_buf_add(audio, 1,
(void __user *)arg);
else
rc = -EPERM;
}
mutex_unlock(&audio->write_lock);
break;
}
case AUDIO_ASYNC_READ: {
mutex_lock(&audio->read_lock);
if ((audio->feedback) && (audio->enabled))
rc = audio_aio_buf_add(audio, 0,
(void __user *)arg);
else
rc = -EPERM;
mutex_unlock(&audio->read_lock);
break;
}
case AUDIO_OUTPORT_FLUSH: {
pr_debug("%s[%p]:AUDIO_OUTPORT_FLUSH\n", __func__, audio);
mutex_lock(&audio->read_lock);
rc = audio_aio_outport_flush(audio);
if (rc < 0) {
pr_err("%s[%p]: AUDIO_OUTPORT_FLUSH failed\n",
__func__, audio);
rc = -EINTR;
}
mutex_unlock(&audio->read_lock);
break;
}
case AUDIO_STOP: {
pr_debug("%s[%p]: AUDIO_STOP session_id[%d]\n", __func__,
audio, audio->ac->session);
mutex_lock(&audio->lock);
audio->stopped = 1;
rc = audio_aio_flush(audio);
if (rc < 0) {
pr_err("%s[%p]:Audio Stop procedure failed rc=%d\n",
__func__, audio, rc);
mutex_unlock(&audio->lock);
break;
}
audio->enabled = 0;
audio->drv_status &= ~ADRV_STATUS_PAUSE;
if (audio->drv_status & ADRV_STATUS_FSYNC) {
pr_debug("%s[%p] Waking up the audio_aio_fsync\n",
__func__, audio);
wake_up(&audio->write_wait);
}
mutex_unlock(&audio->lock);
break;
}
case AUDIO_PAUSE: {
pr_debug("%s[%p]:AUDIO_PAUSE %ld\n", __func__, audio, arg);
mutex_lock(&audio->lock);
if (arg == 1) {
rc = audio_aio_pause(audio);
if (rc < 0) {
pr_err("%s[%p]: pause FAILED rc=%d\n",
__func__, audio, rc);
mutex_unlock(&audio->lock);
break;
}
audio->drv_status |= ADRV_STATUS_PAUSE;
} else if (arg == 0) {
if (audio->drv_status & ADRV_STATUS_PAUSE) {
rc = audio_aio_enable(audio);
if (rc)
pr_err("%s[%p]: audio enable failed\n",
__func__, audio);
else {
audio->drv_status &= ~ADRV_STATUS_PAUSE;
audio->enabled = 1;
}
}
}
mutex_unlock(&audio->lock);
break;
}
case AUDIO_FLUSH: {
pr_debug("%s[%p]: AUDIO_FLUSH sessionid[%d]\n", __func__,
audio, audio->ac->session);
mutex_lock(&audio->lock);
audio->rflush = 1;
audio->wflush = 1;
if (audio->drv_status & ADRV_STATUS_FSYNC) {
pr_debug("%s[%p] Waking up the audio_aio_fsync\n",
__func__, audio);
wake_up(&audio->write_wait);
}
/* Flush DSP */
rc = audio_aio_flush(audio);
/* Flush input / Output buffer in software*/
audio_aio_ioport_reset(audio);
if (rc < 0) {
pr_err("%s[%p]:AUDIO_FLUSH interrupted\n",
__func__, audio);
rc = -EINTR;
} else {
audio->rflush = 0;
if (audio->drv_status & ADRV_STATUS_FSYNC)
wake_up(&audio->write_wait);
else
audio->wflush = 0;
}
audio->eos_flag = 0;
audio->eos_rsp = 0;
mutex_unlock(&audio->lock);
break;
}
case AUDIO_REGISTER_ION: {
struct msm_audio_ion_info info;
pr_debug("%s[%p]:AUDIO_REGISTER_ION\n", __func__, audio);
mutex_lock(&audio->lock);
if (copy_from_user(&info, (void *)arg, sizeof(info)))
rc = -EFAULT;
else
rc = audio_aio_ion_add(audio, &info);
mutex_unlock(&audio->lock);
break;
}
case AUDIO_DEREGISTER_ION: {
struct msm_audio_ion_info info;
mutex_lock(&audio->lock);
pr_debug("%s[%p]:AUDIO_DEREGISTER_ION\n", __func__, audio);
if (copy_from_user(&info, (void *)arg, sizeof(info)))
rc = -EFAULT;
else
rc = audio_aio_ion_remove(audio, &info);
mutex_unlock(&audio->lock);
break;
}
case AUDIO_GET_STREAM_CONFIG: {
struct msm_audio_stream_config cfg;
mutex_lock(&audio->lock);
memset(&cfg, 0, sizeof(cfg));
cfg.buffer_size = audio->str_cfg.buffer_size;
cfg.buffer_count = audio->str_cfg.buffer_count;
pr_debug("%s[%p]:GET STREAM CFG %d %d\n",
__func__, audio, cfg.buffer_size, cfg.buffer_count);
if (copy_to_user((void *)arg, &cfg, sizeof(cfg)))
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
case AUDIO_SET_STREAM_CONFIG: {
struct msm_audio_stream_config cfg;
pr_debug("%s[%p]:SET STREAM CONFIG\n", __func__, audio);
mutex_lock(&audio->lock);
if (copy_from_user(&cfg, (void *)arg, sizeof(cfg))) {
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
audio->str_cfg.buffer_size = FRAME_SIZE;
audio->str_cfg.buffer_count = FRAME_NUM;
rc = 0;
mutex_unlock(&audio->lock);
break;
}
case AUDIO_GET_CONFIG: {
struct msm_audio_config cfg;
mutex_lock(&audio->lock);
if (copy_to_user((void *)arg, &audio->pcm_cfg, sizeof(cfg)))
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
case AUDIO_SET_CONFIG: {
struct msm_audio_config config;
pr_err("%s[%p]:AUDIO_SET_CONFIG\n", __func__, audio);
mutex_lock(&audio->lock);
if (copy_from_user(&config, (void *)arg, sizeof(config))) {
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
if (audio->feedback != NON_TUNNEL_MODE) {
pr_err("%s[%p]:Not sufficient permission to change the playback mode\n",
__func__, audio);
rc = -EACCES;
mutex_unlock(&audio->lock);
break;
}
if ((config.buffer_count > PCM_BUF_COUNT) ||
(config.buffer_count == 1))
config.buffer_count = PCM_BUF_COUNT;
if (config.buffer_size < PCM_BUFSZ_MIN)
config.buffer_size = PCM_BUFSZ_MIN;
audio->pcm_cfg.buffer_count = config.buffer_count;
audio->pcm_cfg.buffer_size = config.buffer_size;
audio->pcm_cfg.channel_count = config.channel_count;
audio->pcm_cfg.sample_rate = config.sample_rate;
rc = 0;
mutex_unlock(&audio->lock);
break;
}
case AUDIO_SET_BUF_CFG: {
struct msm_audio_buf_cfg cfg;
mutex_lock(&audio->lock);
if (copy_from_user(&cfg, (void *)arg, sizeof(cfg))) {
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
if ((audio->feedback == NON_TUNNEL_MODE) &&
!cfg.meta_info_enable) {
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
audio->buf_cfg.meta_info_enable = cfg.meta_info_enable;
pr_debug("%s[%p]:session id %d: Set-buf-cfg: meta[%d]",
__func__, audio,
audio->ac->session, cfg.meta_info_enable);
mutex_unlock(&audio->lock);
break;
}
case AUDIO_GET_BUF_CFG: {
pr_debug("%s[%p]:session id %d: Get-buf-cfg: meta[%d] framesperbuf[%d]\n",
__func__, audio,
audio->ac->session, audio->buf_cfg.meta_info_enable,
audio->buf_cfg.frames_per_buf);
mutex_lock(&audio->lock);
if (copy_to_user((void *)arg, &audio->buf_cfg,
sizeof(struct msm_audio_buf_cfg)))
rc = -EFAULT;
mutex_unlock(&audio->lock);
break;
}
case AUDIO_GET_SESSION_ID: {
mutex_lock(&audio->lock);
if (copy_to_user((void *)arg, &audio->ac->session,
sizeof(unsigned short))) {
rc = -EFAULT;
}
mutex_unlock(&audio->lock);
break;
}
default:
rc = -EINVAL;
}
return rc;
}