M7350/kernel/arch/arm/mach-msm/qdsp6v2/audio_lpa.c
2024-09-09 08:52:07 +00:00

1481 lines
37 KiB
C

/* low power audio output device
*
* 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/cdev.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
#include <linux/kthread.h>
#include <linux/wait.h>
#include <linux/dma-mapping.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/earlysuspend.h>
#include <linux/msm_ion.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <asm/atomic.h>
#include <asm/ioctls.h>
#include <mach/msm_adsp.h>
#include <sound/q6asm.h>
#include <sound/apr_audio.h>
#include "audio_lpa.h"
#include <linux/msm_audio.h>
#include <linux/wakelock.h>
#include <mach/qdsp6v2/audio_dev_ctl.h>
#include <mach/debug_mm.h>
#include <linux/fs.h>
#define MAX_BUF 4
#define BUFSZ (524288)
#define AUDDEC_DEC_PCM 0
#define AUDLPA_EVENT_NUM 10 /* Default number of pre-allocated event packets */
#define __CONTAINS(r, v, l) ({ \
typeof(r) __r = r; \
typeof(v) __v = v; \
typeof(v) __e = __v + l; \
int res = ((__v >= __r->vaddr) && \
(__e <= __r->vaddr + __r->len)); \
res; \
})
#define CONTAINS(r1, r2) ({ \
typeof(r2) __r2 = r2; \
__CONTAINS(r1, __r2->vaddr, __r2->len); \
})
#define IN_RANGE(r, v) ({ \
typeof(r) __r = r; \
typeof(v) __vv = v; \
int res = ((__vv >= __r->vaddr) && \
(__vv < (__r->vaddr + __r->len))); \
res; \
})
#define OVERLAPS(r1, r2) ({ \
typeof(r1) __r1 = r1; \
typeof(r2) __r2 = r2; \
typeof(__r2->vaddr) __v = __r2->vaddr; \
typeof(__v) __e = __v + __r2->len - 1; \
int res = (IN_RANGE(__r1, __v) || IN_RANGE(__r1, __e)); \
res; \
})
struct audlpa_event {
struct list_head list;
int event_type;
union msm_audio_event_payload payload;
};
struct audlpa_ion_region {
struct list_head list;
struct ion_handle *handle;
int fd;
void *vaddr;
unsigned long paddr;
unsigned long kvaddr;
unsigned long len;
unsigned ref_cnt;
};
struct audlpa_buffer_node {
struct list_head list;
struct msm_audio_aio_buf buf;
unsigned long paddr;
};
struct audlpa_dec {
char *name;
int dec_attrb;
long (*ioctl)(struct file *, unsigned int, unsigned long);
int (*set_params)(void *);
};
static void audlpa_post_event(struct audio *audio, int type,
union msm_audio_event_payload payload);
static unsigned long audlpa_ion_fixup(struct audio *audio, void *addr,
unsigned long len, int ref_up);
static void audlpa_unmap_ion_region(struct audio *audio);
static void audlpa_async_send_data(struct audio *audio, unsigned needed,
uint32_t token);
static int audlpa_pause(struct audio *audio);
static long pcm_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
static int audlpa_set_pcm_params(void *data);
struct audlpa_dec audlpa_decs[] = {
{"msm_pcm_lp_dec", AUDDEC_DEC_PCM, &pcm_ioctl,
&audlpa_set_pcm_params},
};
static void lpa_listner(u32 evt_id, union auddev_evt_data *evt_payload,
void *private_data)
{
struct audio *audio = (struct audio *) private_data;
int rc = 0;
switch (evt_id) {
case AUDDEV_EVT_STREAM_VOL_CHG:
audio->volume = evt_payload->session_vol;
pr_debug("%s: AUDDEV_EVT_STREAM_VOL_CHG, stream vol %d, "
"enabled = %d\n", __func__, audio->volume,
audio->out_enabled);
if (audio->out_enabled == 1) {
if (audio->ac) {
rc = q6asm_set_volume(audio->ac, audio->volume);
if (rc < 0) {
pr_err("%s: Send Volume command failed"
" rc=%d\n", __func__, rc);
}
}
}
break;
default:
pr_err("%s:ERROR:wrong event\n", __func__);
break;
}
}
static void audlpa_prevent_sleep(struct audio *audio)
{
pr_debug("%s:\n", __func__);
wake_lock(&audio->wakelock);
}
static void audlpa_allow_sleep(struct audio *audio)
{
pr_debug("%s:\n", __func__);
wake_unlock(&audio->wakelock);
}
/* must be called with audio->lock held */
static int audio_enable(struct audio *audio)
{
pr_debug("%s\n", __func__);
return q6asm_run(audio->ac, 0, 0, 0);
}
static void audlpa_async_flush(struct audio *audio)
{
struct audlpa_buffer_node *buf_node;
struct list_head *ptr, *next;
union msm_audio_event_payload payload;
int rc = 0;
pr_debug("%s:out_enabled = %d, drv_status = 0x%x\n", __func__,
audio->out_enabled, audio->drv_status);
if (audio->out_enabled) {
list_for_each_safe(ptr, next, &audio->out_queue) {
buf_node = list_entry(ptr, struct audlpa_buffer_node,
list);
list_del(&buf_node->list);
payload.aio_buf = buf_node->buf;
audlpa_post_event(audio, AUDIO_EVENT_WRITE_DONE,
payload);
kfree(buf_node);
}
/* Implicitly issue a pause to the decoder before flushing if
it is not in pause state */
if (!(audio->drv_status & ADRV_STATUS_PAUSE)) {
rc = audlpa_pause(audio);
if (rc < 0)
pr_err("%s: pause cmd failed rc=%d\n", __func__,
rc);
}
rc = q6asm_cmd(audio->ac, CMD_FLUSH);
if (rc < 0)
pr_err("%s: flush cmd failed rc=%d\n", __func__, rc);
audio->drv_status &= ~ADRV_STATUS_OBUF_GIVEN;
audio->out_needed = 0;
if (audio->stopped == 0) {
rc = audio_enable(audio);
if (rc < 0)
pr_err("%s: audio enable failed\n", __func__);
else {
audio->out_enabled = 1;
audio->out_needed = 1;
if (audio->drv_status & ADRV_STATUS_PAUSE)
audio->drv_status &= ~ADRV_STATUS_PAUSE;
}
}
wake_up(&audio->write_wait);
}
}
/* must be called with audio->lock held */
static int audio_disable(struct audio *audio)
{
int rc = 0;
pr_debug("%s:%d %d\n", __func__, audio->opened, audio->out_enabled);
if (audio->opened) {
audio->out_enabled = 0;
audio->opened = 0;
rc = q6asm_cmd(audio->ac, CMD_CLOSE);
if (rc < 0)
pr_err("%s: CLOSE cmd failed\n", __func__);
else
pr_debug("%s: rxed CLOSE resp\n", __func__);
audio->drv_status &= ~ADRV_STATUS_OBUF_GIVEN;
wake_up(&audio->write_wait);
audio->out_needed = 0;
}
return rc;
}
static int audlpa_pause(struct audio *audio)
{
int rc = 0;
pr_debug("%s, enabled = %d\n", __func__,
audio->out_enabled);
if (audio->out_enabled) {
rc = q6asm_cmd(audio->ac, CMD_PAUSE);
if (rc < 0)
pr_err("%s: pause cmd failed rc=%d\n", __func__, rc);
} else
pr_err("%s: Driver not enabled\n", __func__);
return rc;
}
/* ------------------- dsp --------------------- */
static void audlpa_async_send_data(struct audio *audio, unsigned needed,
uint32_t token)
{
unsigned long flags;
struct audio_client *ac;
int rc = 0;
pr_debug("%s:\n", __func__);
spin_lock_irqsave(&audio->dsp_lock, flags);
pr_debug("%s: needed = %d, out_needed = %d, token = 0x%x\n",
__func__, needed, audio->out_needed, token);
if (needed && !audio->wflush) {
audio->out_needed = 1;
if (audio->drv_status & ADRV_STATUS_OBUF_GIVEN) {
/* pop one node out of queue */
union msm_audio_event_payload evt_payload;
struct audlpa_buffer_node *used_buf;
used_buf = list_first_entry(&audio->out_queue,
struct audlpa_buffer_node, list);
if (token == used_buf->paddr) {
pr_debug("%s, Release: addr: %lx,"
" token = 0x%x\n", __func__,
used_buf->paddr, token);
list_del(&used_buf->list);
evt_payload.aio_buf = used_buf->buf;
audlpa_post_event(audio, AUDIO_EVENT_WRITE_DONE,
evt_payload);
kfree(used_buf);
audio->drv_status &= ~ADRV_STATUS_OBUF_GIVEN;
}
}
}
pr_debug("%s: out_needed = %d, stopped = %d, drv_status = 0x%x\n",
__func__, audio->out_needed, audio->stopped,
audio->drv_status);
if (audio->out_needed && (audio->stopped == 0)) {
struct audlpa_buffer_node *next_buf;
struct audio_aio_write_param param;
if (!list_empty(&audio->out_queue)) {
pr_debug("%s: list not empty\n", __func__);
next_buf = list_first_entry(&audio->out_queue,
struct audlpa_buffer_node, list);
if (next_buf) {
pr_debug("%s: Send: addr: %lx\n", __func__,
next_buf->paddr);
ac = audio->ac;
param.paddr = next_buf->paddr;
param.len = next_buf->buf.data_len;
param.msw_ts = 0;
param.lsw_ts = 0;
/* No time stamp valid */
param.flags = NO_TIMESTAMP;
param.uid = next_buf->paddr;
rc = q6asm_async_write(ac, &param);
if (rc < 0)
pr_err("%s:q6asm_async_write failed\n",
__func__);
audio->out_needed = 0;
audio->drv_status |= ADRV_STATUS_OBUF_GIVEN;
}
} else if (list_empty(&audio->out_queue) &&
(audio->drv_status & ADRV_STATUS_FSYNC)) {
pr_debug("%s: list is empty, reached EOS\n", __func__);
wake_up(&audio->write_wait);
}
}
spin_unlock_irqrestore(&audio->dsp_lock, flags);
}
static int audlpa_events_pending(struct audio *audio)
{
int empty;
spin_lock(&audio->event_queue_lock);
empty = !list_empty(&audio->event_queue);
spin_unlock(&audio->event_queue_lock);
return empty || audio->event_abort;
}
static void audlpa_reset_event_queue(struct audio *audio)
{
struct audlpa_event *drv_evt;
struct list_head *ptr, *next;
spin_lock(&audio->event_queue_lock);
list_for_each_safe(ptr, next, &audio->event_queue) {
drv_evt = list_first_entry(&audio->event_queue,
struct audlpa_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 audlpa_event, list);
list_del(&drv_evt->list);
kfree(drv_evt);
}
spin_unlock(&audio->event_queue_lock);
return;
}
static long audlpa_process_event_req(struct audio *audio, void __user *arg)
{
long rc;
struct msm_audio_event usr_evt;
struct audlpa_event *drv_evt = NULL;
int timeout;
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, audlpa_events_pending(audio),
msecs_to_jiffies(timeout));
if (rc == 0)
return -ETIMEDOUT;
} else {
rc = wait_event_interruptible(
audio->event_wait, audlpa_events_pending(audio));
}
if (rc < 0)
return rc;
if (audio->event_abort) {
audio->event_abort = 0;
return -ENODEV;
}
rc = 0;
spin_lock(&audio->event_queue_lock);
if (!list_empty(&audio->event_queue)) {
drv_evt = list_first_entry(&audio->event_queue,
struct audlpa_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
rc = -1;
spin_unlock(&audio->event_queue_lock);
if (drv_evt && (drv_evt->event_type == AUDIO_EVENT_WRITE_DONE ||
drv_evt->event_type == AUDIO_EVENT_READ_DONE)) {
pr_debug("%s: AUDIO_EVENT_WRITE_DONE completing\n", __func__);
mutex_lock(&audio->lock);
audlpa_ion_fixup(audio, drv_evt->payload.aio_buf.buf_addr,
drv_evt->payload.aio_buf.buf_len, 0);
mutex_unlock(&audio->lock);
}
if (!rc && copy_to_user(arg, &usr_evt, sizeof(usr_evt)))
rc = -EFAULT;
return rc;
}
static int audlpa_ion_check(struct audio *audio,
void *vaddr, unsigned long len)
{
struct audlpa_ion_region *region_elt;
struct audlpa_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 audlpa_ion_add(struct audio *audio,
struct msm_audio_ion_info *info)
{
ion_phys_addr_t paddr;
size_t len;
unsigned long kvaddr;
struct audlpa_ion_region *region;
int rc = -EINVAL;
struct ion_handle *handle;
unsigned long ionflag;
void *temp_ptr;
pr_debug("%s[%p]:\n", __func__, audio);
region = kmalloc(sizeof(*region), GFP_KERNEL);
if (!region) {
rc = -ENOMEM;
goto end;
}
handle = ion_import_dma_buf(audio->client, info->fd);
if (IS_ERR_OR_NULL(handle)) {
pr_err("%s: could not get handle of the given fd\n", __func__);
goto import_error;
}
rc = ion_handle_get_flags(audio->client, handle, &ionflag);
if (rc) {
pr_err("%s: could not get flags for the handle\n", __func__);
goto flag_error;
}
temp_ptr = ion_map_kernel(audio->client, handle);
if (IS_ERR_OR_NULL(temp_ptr)) {
pr_err("%s: could not get virtual address\n", __func__);
goto map_error;
}
kvaddr = (unsigned long) temp_ptr;
rc = ion_phys(audio->client, handle, &paddr, &len);
if (rc) {
pr_err("%s: could not get physical address\n", __func__);
goto ion_error;
}
rc = audlpa_ion_check(audio, info->vaddr, len);
if (rc < 0) {
pr_err("%s: audlpa_ion_check failed\n", __func__);
goto ion_error;
}
region->handle = handle;
region->vaddr = info->vaddr;
region->fd = info->fd;
region->paddr = paddr;
region->kvaddr = 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 ion_error;
} else {
goto end;
}
ion_error:
ion_unmap_kernel(audio->client, handle);
map_error:
flag_error:
ion_free(audio->client, handle);
import_error:
kfree(region);
end:
return rc;
}
static int audlpa_ion_remove(struct audio *audio,
struct msm_audio_ion_info *info)
{
struct audlpa_ion_region *region;
struct list_head *ptr, *next;
int rc = -EINVAL;
list_for_each_safe(ptr, next, &audio->ion_region_queue) {
region = list_entry(ptr, struct audlpa_ion_region, list);
if (region != NULL && (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;
}
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);
ion_unmap_kernel(audio->client, region->handle);
ion_free(audio->client, region->handle);
kfree(region);
rc = 0;
break;
}
}
return rc;
}
static int audlpa_ion_lookup_vaddr(struct audio *audio, void *addr,
unsigned long len, struct audlpa_ion_region **region)
{
struct audlpa_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 audlpa_ion_fixup(struct audio *audio, void *addr,
unsigned long len, int ref_up)
{
struct audlpa_ion_region *region;
unsigned long paddr;
int ret;
ret = audlpa_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--;
paddr = region->paddr + (addr - region->vaddr);
return paddr;
}
/* audio -> lock must be held at this point */
static int audlpa_aio_buf_add(struct audio *audio, unsigned dir,
void __user *arg)
{
struct audlpa_buffer_node *buf_node;
buf_node = kmalloc(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;
}
buf_node->paddr = audlpa_ion_fixup(
audio, buf_node->buf.buf_addr,
buf_node->buf.buf_len, 1);
if (dir) {
/* write */
if (!buf_node->paddr ||
(buf_node->paddr & 0x1) ||
(buf_node->buf.data_len & 0x1)) {
kfree(buf_node);
return -EINVAL;
}
list_add_tail(&buf_node->list, &audio->out_queue);
pr_debug("%s, Added to list: addr: %lx, length = %d\n",
__func__, buf_node->paddr, buf_node->buf.data_len);
audlpa_async_send_data(audio, 0, 0);
} else {
/* read */
kfree(buf_node);
}
return 0;
}
static int config(struct audio *audio)
{
int rc = 0;
if (!audio->out_prefill) {
if (audio->codec_ops.set_params != NULL) {
rc = audio->codec_ops.set_params(audio);
audio->out_prefill = 1;
}
}
return rc;
}
void q6_audlpa_out_cb(uint32_t opcode, uint32_t token,
uint32_t *payload, void *priv)
{
struct audio *audio = (struct audio *) priv;
switch (opcode) {
case ASM_DATA_EVENT_WRITE_DONE:
pr_debug("%s: ASM_DATA_EVENT_WRITE_DONE, token = 0x%x\n",
__func__, token);
audlpa_async_send_data(audio, 1, token);
break;
case ASM_DATA_EVENT_EOS:
case ASM_DATA_CMDRSP_EOS:
pr_debug("%s: ASM_DATA_CMDRSP_EOS, teos = %d\n", __func__,
audio->teos);
if (audio->teos == 0) {
audio->teos = 1;
wake_up(&audio->write_wait);
}
break;
case ASM_SESSION_CMDRSP_GET_SESSION_TIME:
break;
case RESET_EVENTS:
reset_device();
break;
default:
break;
}
}
static long pcm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
pr_debug("%s: cmd = %d\n", __func__, cmd);
return -EINVAL;
}
static int audlpa_set_pcm_params(void *data)
{
struct audio *audio = (struct audio *)data;
int rc;
rc = q6asm_media_format_block_pcm(audio->ac, audio->out_sample_rate,
audio->out_channel_mode);
if (rc < 0)
pr_err("%s: Format block pcm failed\n", __func__);
return rc;
}
static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct audio *audio = file->private_data;
int rc = -EINVAL;
uint64_t timestamp;
uint64_t temp;
pr_debug("%s: audio_ioctl() cmd = %d\n", __func__, cmd);
if (cmd == AUDIO_GET_STATS) {
struct msm_audio_stats stats;
pr_debug("%s: AUDIO_GET_STATS cmd\n", __func__);
memset(&stats, 0, sizeof(stats));
rc = q6asm_get_session_time(audio->ac, &timestamp);
if (rc < 0) {
pr_err("%s: Get Session Time return value =%lld\n",
__func__, timestamp);
return -EAGAIN;
}
temp = (timestamp * 2 * audio->out_channel_mode);
temp = temp * (audio->out_sample_rate/1000);
temp = div_u64(temp, 1000);
audio->bytes_consumed = (uint32_t)(temp & 0xFFFFFFFF);
stats.byte_count = audio->bytes_consumed;
stats.unused[0] = (uint32_t)((temp >> 32) & 0xFFFFFFFF);
pr_debug("%s: bytes_consumed:lsb = %d, msb = %d,"
"timestamp = %lld\n", __func__,
audio->bytes_consumed, stats.unused[0], timestamp);
if (copy_to_user((void *) arg, &stats, sizeof(stats)))
return -EFAULT;
return 0;
}
switch (cmd) {
case AUDIO_ENABLE_AUDPP:
break;
case AUDIO_SET_VOLUME:
break;
case AUDIO_SET_PAN:
break;
case AUDIO_SET_EQ:
break;
}
if (cmd == AUDIO_GET_EVENT) {
pr_debug("%s: AUDIO_GET_EVENT\n", __func__);
if (mutex_trylock(&audio->get_event_lock)) {
rc = audlpa_process_event_req(audio,
(void __user *) arg);
mutex_unlock(&audio->get_event_lock);
} else
rc = -EBUSY;
return rc;
}
if (cmd == AUDIO_ABORT_GET_EVENT) {
audio->event_abort = 1;
wake_up(&audio->event_wait);
return 0;
}
mutex_lock(&audio->lock);
switch (cmd) {
case AUDIO_START:
pr_info("%s: AUDIO_START: Session %d\n", __func__,
audio->ac->session);
if (!audio->opened) {
pr_err("%s: Driver not opened\n", __func__);
rc = -EFAULT;
goto fail;
}
rc = config(audio);
if (rc) {
pr_err("%s: Out Configuration failed\n", __func__);
rc = -EFAULT;
goto fail;
}
rc = audio_enable(audio);
if (rc) {
pr_err("%s: audio enable failed\n", __func__);
rc = -EFAULT;
goto fail;
} else {
struct asm_softpause_params softpause = {
.enable = SOFT_PAUSE_ENABLE,
.period = SOFT_PAUSE_PERIOD,
.step = SOFT_PAUSE_STEP,
.rampingcurve = SOFT_PAUSE_CURVE_LINEAR,
};
struct asm_softvolume_params softvol = {
.period = SOFT_VOLUME_PERIOD,
.step = SOFT_VOLUME_STEP,
.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;
audio->out_enabled = 1;
audio->out_needed = 1;
rc = q6asm_set_volume(audio->ac, audio->volume);
if (rc < 0)
pr_err("%s: Send Volume command failed rc=%d\n",
__func__, rc);
rc = q6asm_set_softpause(audio->ac, &softpause);
if (rc < 0)
pr_err("%s: Send SoftPause Param failed rc=%d\n",
__func__, rc);
rc = q6asm_set_softvolume(audio->ac, &softvol);
if (rc < 0)
pr_err("%s: Send SoftVolume Param failed rc=%d\n",
__func__, rc);
rc = q6asm_set_lrgain(audio->ac, 0x2000, 0x2000);
if (rc < 0)
pr_err("%s: Send channel gain failed rc=%d\n",
__func__, 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);
if (!list_empty(&audio->out_queue))
pr_err("%s: write_list is not empty!!!\n",
__func__);
if (audio->stopped == 1)
audio->stopped = 0;
audlpa_prevent_sleep(audio);
}
break;
case AUDIO_STOP:
pr_info("%s: AUDIO_STOP: session_id:%d\n", __func__,
audio->ac->session);
audio->stopped = 1;
audlpa_async_flush(audio);
audio->out_enabled = 0;
audio->out_needed = 0;
audio->drv_status &= ~ADRV_STATUS_PAUSE;
audlpa_allow_sleep(audio);
break;
case AUDIO_FLUSH:
pr_debug("%s: AUDIO_FLUSH: session_id:%d\n", __func__,
audio->ac->session);
audio->wflush = 1;
if (audio->out_enabled)
audlpa_async_flush(audio);
else
audio->wflush = 0;
audio->wflush = 0;
break;
case AUDIO_SET_CONFIG:{
struct msm_audio_config config;
pr_debug("%s: AUDIO_SET_CONFIG\n", __func__);
if (copy_from_user(&config, (void *) arg, sizeof(config))) {
rc = -EFAULT;
pr_err("%s: ERROR: copy from user\n", __func__);
break;
}
if (!((config.channel_count == 1) ||
(config.channel_count == 2))) {
rc = -EINVAL;
pr_err("%s: ERROR: config.channel_count == %d\n",
__func__, config.channel_count);
break;
}
if (!((config.bits == 8) || (config.bits == 16) ||
(config.bits == 24))) {
rc = -EINVAL;
pr_err("%s: ERROR: config.bits = %d\n", __func__,
config.bits);
break;
}
audio->out_sample_rate = config.sample_rate;
audio->out_channel_mode = config.channel_count;
audio->out_bits = config.bits;
audio->buffer_count = config.buffer_count;
audio->buffer_size = config.buffer_size;
rc = 0;
break;
}
case AUDIO_GET_CONFIG:{
struct msm_audio_config config;
config.buffer_count = audio->buffer_count;
config.buffer_size = audio->buffer_size;
config.sample_rate = audio->out_sample_rate;
config.channel_count = audio->out_channel_mode;
config.bits = audio->out_bits;
config.meta_field = 0;
config.unused[0] = 0;
config.unused[1] = 0;
config.unused[2] = 0;
if (copy_to_user((void *) arg, &config, sizeof(config)))
rc = -EFAULT;
else
rc = 0;
break;
}
case AUDIO_PAUSE:
pr_debug("%s: AUDIO_PAUSE %ld\n", __func__, arg);
if (arg == 1) {
rc = audlpa_pause(audio);
if (rc < 0)
pr_err("%s: pause FAILED rc=%d\n", __func__,
rc);
audio->drv_status |= ADRV_STATUS_PAUSE;
} else if (arg == 0) {
if (audio->drv_status & ADRV_STATUS_PAUSE) {
rc = audio_enable(audio);
if (rc)
pr_err("%s: audio enable failed\n",
__func__);
else {
audio->drv_status &= ~ADRV_STATUS_PAUSE;
audio->out_enabled = 1;
}
}
}
break;
case AUDIO_REGISTER_ION: {
struct msm_audio_ion_info info;
pr_debug("%s: AUDIO_REGISTER_ION\n", __func__);
if (copy_from_user(&info, (void *)arg, sizeof(info)))
rc = -EFAULT;
else
rc = audlpa_ion_add(audio, &info);
break;
}
case AUDIO_DEREGISTER_ION: {
struct msm_audio_ion_info info;
pr_debug("%s: AUDIO_DEREGISTER_ION\n", __func__);
if (copy_from_user(&info, (void *)arg, sizeof(info)))
rc = -EFAULT;
else
rc = audlpa_ion_remove(audio, &info);
break;
}
case AUDIO_ASYNC_WRITE:
pr_debug("%s: AUDIO_ASYNC_WRITE\n", __func__);
if (audio->drv_status & ADRV_STATUS_FSYNC)
rc = -EBUSY;
else
rc = audlpa_aio_buf_add(audio, 1, (void __user *) arg);
break;
case AUDIO_GET_SESSION_ID:
if (copy_to_user((void *) arg, &audio->ac->session,
sizeof(unsigned short)))
return -EFAULT;
rc = 0;
break;
default:
rc = audio->codec_ops.ioctl(file, cmd, arg);
}
fail:
mutex_unlock(&audio->lock);
return rc;
}
/* Only useful in tunnel-mode */
int audlpa_async_fsync(struct audio *audio)
{
int rc = 0;
pr_info("%s:Session %d\n", __func__, audio->ac->session);
/* Blocking client sends more data */
mutex_lock(&audio->lock);
audio->drv_status |= ADRV_STATUS_FSYNC;
mutex_unlock(&audio->lock);
mutex_lock(&audio->write_lock);
audio->teos = 0;
rc = wait_event_interruptible(audio->write_wait,
((list_empty(&audio->out_queue)) ||
audio->wflush || audio->stopped));
if (audio->wflush || audio->stopped)
goto flush_event;
if (rc < 0) {
pr_err("%s: wait event for list_empty failed, rc = %d\n",
__func__, rc);
goto done;
}
rc = q6asm_cmd(audio->ac, CMD_EOS);
if (rc < 0) {
pr_err("%s: q6asm_cmd failed, rc = %d", __func__, rc);
goto done;
}
rc = wait_event_interruptible_timeout(audio->write_wait,
(audio->teos || audio->wflush ||
audio->stopped), 5*HZ);
if (rc < 0) {
pr_err("%s: wait event for teos failed, rc = %d\n", __func__,
rc);
goto done;
}
if (audio->teos == 1) {
rc = audio_enable(audio);
if (rc)
pr_err("%s: audio enable failed\n", __func__);
else {
audio->drv_status &= ~ADRV_STATUS_PAUSE;
audio->out_enabled = 1;
audio->out_needed = 1;
}
}
flush_event:
if (audio->stopped || audio->wflush)
rc = -EBUSY;
done:
mutex_unlock(&audio->write_lock);
mutex_lock(&audio->lock);
audio->drv_status &= ~ADRV_STATUS_FSYNC;
mutex_unlock(&audio->lock);
return rc;
}
int audlpa_fsync(struct file *file, loff_t ppos1, loff_t ppos2, int datasync)
{
struct audio *audio = file->private_data;
return audlpa_async_fsync(audio);
}
void audlpa_reset_ion_region(struct audio *audio)
{
struct audlpa_ion_region *region;
struct list_head *ptr, *next;
list_for_each_safe(ptr, next, &audio->ion_region_queue) {
region = list_entry(ptr, struct audlpa_ion_region, list);
list_del(&region->list);
ion_unmap_kernel(audio->client, region->handle);
ion_free(audio->client, region->handle);
kfree(region);
}
return;
}
static void audlpa_unmap_ion_region(struct audio *audio)
{
struct audlpa_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 audlpa_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: memory unmap failed\n", __func__);
}
}
}
static int audio_release(struct inode *inode, struct file *file)
{
struct audio *audio = file->private_data;
pr_info("%s: audio instance 0x%08x freeing, session %d\n", __func__,
(int)audio, audio->ac->session);
mutex_lock(&audio->lock);
audio->wflush = 1;
if (audio->out_enabled)
audlpa_async_flush(audio);
audio->wflush = 0;
audio_disable(audio);
audlpa_unmap_ion_region(audio);
msm_clear_session_id(audio->ac->session);
auddev_unregister_evt_listner(AUDDEV_CLNT_DEC, audio->ac->session);
q6asm_audio_client_free(audio->ac);
audlpa_reset_ion_region(audio);
ion_client_destroy(audio->client);
#ifdef CONFIG_HAS_EARLYSUSPEND
unregister_early_suspend(&audio->suspend_ctl.node);
#endif
audio->opened = 0;
audio->out_enabled = 0;
audio->out_prefill = 0;
audio->event_abort = 1;
wake_up(&audio->event_wait);
audlpa_reset_event_queue(audio);
if (audio->stopped == 0)
audlpa_allow_sleep(audio);
wake_lock_destroy(&audio->wakelock);
mutex_unlock(&audio->lock);
#ifdef CONFIG_DEBUG_FS
if (audio->dentry)
debugfs_remove(audio->dentry);
#endif
kfree(audio);
return 0;
}
static void audlpa_post_event(struct audio *audio, int type,
union msm_audio_event_payload payload)
{
struct audlpa_event *e_node = NULL;
spin_lock(&audio->event_queue_lock);
pr_debug("%s:\n", __func__);
if (!list_empty(&audio->free_event_queue)) {
e_node = list_first_entry(&audio->free_event_queue,
struct audlpa_event, list);
list_del(&e_node->list);
} else {
e_node = kmalloc(sizeof(struct audlpa_event), GFP_ATOMIC);
if (!e_node) {
pr_err("%s: No mem to post event %d\n", __func__, type);
return;
}
}
e_node->event_type = type;
e_node->payload = payload;
list_add_tail(&e_node->list, &audio->event_queue);
spin_unlock(&audio->event_queue_lock);
wake_up(&audio->event_wait);
}
#ifdef CONFIG_HAS_EARLYSUSPEND
static void audlpa_suspend(struct early_suspend *h)
{
struct audlpa_suspend_ctl *ctl =
container_of(h, struct audlpa_suspend_ctl, node);
union msm_audio_event_payload payload;
pr_debug("%s:\n", __func__);
audlpa_post_event(ctl->audio, AUDIO_EVENT_SUSPEND, payload);
}
static void audlpa_resume(struct early_suspend *h)
{
struct audlpa_suspend_ctl *ctl =
container_of(h, struct audlpa_suspend_ctl, node);
union msm_audio_event_payload payload;
pr_debug("%s:\n", __func__);
audlpa_post_event(ctl->audio, AUDIO_EVENT_RESUME, payload);
}
#endif
#ifdef CONFIG_DEBUG_FS
static ssize_t audlpa_debug_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static ssize_t audlpa_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 audio *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,
"out_enabled %d\n", audio->out_enabled);
n += scnprintf(buffer + n, debug_bufmax - n,
"stopped %d\n", audio->stopped);
n += scnprintf(buffer + n, debug_bufmax - n,
"volume %x\n", audio->volume);
n += scnprintf(buffer + n, debug_bufmax - n,
"sample rate %d\n",
audio->out_sample_rate);
n += scnprintf(buffer + n, debug_bufmax - n,
"channel mode %d\n",
audio->out_channel_mode);
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,
"running %d\n", audio->running);
n += scnprintf(buffer + n, debug_bufmax - n,
"out_needed %d\n", audio->out_needed);
buffer[n] = 0;
return simple_read_from_buffer(buf, count, ppos, buffer, n);
}
static const struct file_operations audlpa_debug_fops = {
.read = audlpa_debug_read,
.open = audlpa_debug_open,
};
#endif
static int audio_open(struct inode *inode, struct file *file)
{
struct audio *audio = NULL;
int rc, i, dec_attrb = 0;
struct audlpa_event *e_node = NULL;
#ifdef CONFIG_DEBUG_FS
/* 4 bytes represents decoder number, 1 byte for terminate string */
char name[sizeof "msm_lpa_" + 5];
#endif
char wake_lock_name[24];
/* Allocate audio instance, set to zero */
audio = kzalloc(sizeof(struct audio), GFP_KERNEL);
if (!audio) {
pr_err("%s: no memory to allocate audio instance\n", __func__);
rc = -ENOMEM;
goto done;
}
if ((file->f_mode & FMODE_WRITE) && !(file->f_mode & FMODE_READ)) {
pr_debug("%s: Tunnel Mode playback\n", __func__);
} else {
kfree(audio);
rc = -EACCES;
goto done;
}
/* Allocate the decoder based on inode minor number*/
audio->minor_no = iminor(inode);
dec_attrb |= audlpa_decs[audio->minor_no].dec_attrb;
audio->codec_ops.ioctl = audlpa_decs[audio->minor_no].ioctl;
audio->codec_ops.set_params = audlpa_decs[audio->minor_no].set_params;
audio->buffer_size = BUFSZ;
audio->buffer_count = MAX_BUF;
audio->ac = q6asm_audio_client_alloc((app_cb)q6_audlpa_out_cb,
(void *)audio);
if (!audio->ac) {
pr_err("%s: Could not allocate memory for lpa client\n",
__func__);
rc = -ENOMEM;
goto err;
}
rc = q6asm_open_write(audio->ac, FORMAT_LINEAR_PCM);
if (rc < 0) {
pr_err("%s: lpa out open failed\n", __func__);
goto err;
}
pr_debug("%s: Set mode to AIO session[%d]\n",
__func__,
audio->ac->session);
rc = q6asm_set_io_mode(audio->ac, ASYNC_IO_MODE);
if (rc < 0)
pr_err("%s: Set IO mode failed\n", __func__);
/* Initialize all locks of audio instance */
mutex_init(&audio->lock);
mutex_init(&audio->write_lock);
mutex_init(&audio->get_event_lock);
spin_lock_init(&audio->dsp_lock);
init_waitqueue_head(&audio->write_wait);
INIT_LIST_HEAD(&audio->out_queue);
INIT_LIST_HEAD(&audio->ion_region_queue);
INIT_LIST_HEAD(&audio->free_event_queue);
INIT_LIST_HEAD(&audio->event_queue);
init_waitqueue_head(&audio->wait);
init_waitqueue_head(&audio->event_wait);
spin_lock_init(&audio->event_queue_lock);
snprintf(wake_lock_name, sizeof wake_lock_name, "audio_lpa_%x",
audio->ac->session);
wake_lock_init(&audio->wakelock, WAKE_LOCK_SUSPEND, wake_lock_name);
audio->out_sample_rate = 44100;
audio->out_channel_mode = 2;
audio->out_bits = 16;
audio->volume = 0x2000;
file->private_data = audio;
audio->opened = 1;
audio->out_enabled = 0;
audio->out_prefill = 0;
audio->bytes_consumed = 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,
lpa_listner,
(void *)audio);
if (rc) {
pr_err("%s: failed to register listner\n", __func__);
goto err;
}
#ifdef CONFIG_DEBUG_FS
snprintf(name, sizeof name, "msm_lpa_%04x", audio->ac->session);
audio->dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
NULL, (void *) audio, &audlpa_debug_fops);
if (IS_ERR(audio->dentry))
pr_err("%s: debugfs_create_file failed\n", __func__);
#endif
#ifdef CONFIG_HAS_EARLYSUSPEND
audio->suspend_ctl.node.level = EARLY_SUSPEND_LEVEL_DISABLE_FB;
audio->suspend_ctl.node.resume = audlpa_resume;
audio->suspend_ctl.node.suspend = audlpa_suspend;
audio->suspend_ctl.audio = audio;
register_early_suspend(&audio->suspend_ctl.node);
#endif
for (i = 0; i < AUDLPA_EVENT_NUM; i++) {
e_node = kmalloc(sizeof(struct audlpa_event), GFP_KERNEL);
if (e_node)
list_add_tail(&e_node->list, &audio->free_event_queue);
else {
pr_err("%s: event pkt alloc failed\n", __func__);
break;
}
}
pr_info("%s: audio instance 0x%08x created session[%d]\n", __func__,
(int)audio,
audio->ac->session);
audio->client = msm_ion_client_create(UINT_MAX, "Audio_LPA_Client");
if (IS_ERR_OR_NULL(audio->client)) {
pr_err("Unable to create ION client\n");
goto err;
}
pr_debug("Allocating ION clinet in audio_open %p", audio->client);
done:
return rc;
err:
q6asm_audio_client_free(audio->ac);
kfree(audio);
return rc;
}
static const struct file_operations audio_lpa_fops = {
.owner = THIS_MODULE,
.open = audio_open,
.release = audio_release,
.unlocked_ioctl = audio_ioctl,
.fsync = audlpa_fsync,
};
static dev_t audlpa_devno;
static struct class *audlpa_class;
struct audlpa_device {
const char *name;
struct device *device;
struct cdev cdev;
};
static struct audlpa_device *audlpa_devices;
static void audlpa_create(struct audlpa_device *adev, const char *name,
struct device *parent, dev_t devt)
{
struct device *dev;
int rc;
dev = device_create(audlpa_class, parent, devt, "%s", name);
if (IS_ERR(dev))
return;
cdev_init(&adev->cdev, &audio_lpa_fops);
adev->cdev.owner = THIS_MODULE;
rc = cdev_add(&adev->cdev, devt, 1);
if (rc < 0) {
device_destroy(audlpa_class, devt);
} else {
adev->device = dev;
adev->name = name;
}
}
static int __init audio_init(void)
{
int rc;
int n = ARRAY_SIZE(audlpa_decs);
audlpa_devices = kzalloc(sizeof(struct audlpa_device) * n, GFP_KERNEL);
if (!audlpa_devices)
return -ENOMEM;
audlpa_class = class_create(THIS_MODULE, "audlpa");
if (IS_ERR(audlpa_class))
goto fail_create_class;
rc = alloc_chrdev_region(&audlpa_devno, 0, n, "msm_audio_lpa");
if (rc < 0)
goto fail_alloc_region;
for (n = 0; n < ARRAY_SIZE(audlpa_decs); n++) {
audlpa_create(audlpa_devices + n,
audlpa_decs[n].name, NULL,
MKDEV(MAJOR(audlpa_devno), n));
}
return 0;
fail_alloc_region:
class_unregister(audlpa_class);
return rc;
fail_create_class:
kfree(audlpa_devices);
return -ENOMEM;
}
static void __exit audio_exit(void)
{
class_unregister(audlpa_class);
kfree(audlpa_devices);
}
module_init(audio_init);
module_exit(audio_exit);
MODULE_DESCRIPTION("MSM LPA driver");
MODULE_LICENSE("GPL v2");