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M7350/kernel/arch/arm/mach-msm/qdsp5/audio_lpa.c

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M7350v1_en_gpl
2024-09-09 08:52:07 +00:00
/* audio_lpa.c - low power audio driver
*
* Copyright (c) 2012, The Linux Foundation. All rights reserved.
*
* Based on the PCM decoder driver in arch/arm/mach-msm/qdsp5/audio_pcm.c
*
* Copyright (C) 2008 Google, Inc.
* Copyright (C) 2008 HTC Corporation
*
* All source code in this file is licensed under the following license except
* where indicated.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* 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, you can find it at http://www.fsf.org
*/
#include <asm/atomic.h>
#include <asm/ioctls.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/miscdevice.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 <linux/msm_audio.h>
#include <mach/msm_adsp.h>
#include <mach/iommu.h>
#include <mach/iommu_domains.h>
#include <mach/qdsp5/qdsp5audppcmdi.h>
#include <mach/qdsp5/qdsp5audppmsg.h>
#include <mach/qdsp5/qdsp5audpp.h>
#include <mach/qdsp5/qdsp5audplaycmdi.h>
#include <mach/qdsp5/qdsp5audplaymsg.h>
#include <mach/qdsp5/qdsp5rmtcmdi.h>
#include <mach/debug_mm.h>
#include <linux/memory_alloc.h>
#include <mach/msm_memtypes.h>
#include "audmgr.h"
/* for queue ids - should be relative to module number*/
#include "adsp.h"
#define ADRV_STATUS_AIO_INTF 0x00000001
#define ADRV_STATUS_OBUF_GIVEN 0x00000002
#define ADRV_STATUS_IBUF_GIVEN 0x00000004
#define ADRV_STATUS_FSYNC 0x00000008
#define MSM_MAX_VOLUME 0x2000
/* 17 added to avoid more deviation */
#define MSM_VOLUME_STEP (MSM_MAX_VOLUME+17)
#define MSM_VOLUME_FACTOR (10000)
/* Size must be power of 2 */
#define MAX_BUF 2
#define BUFSZ (524288)
#define AUDDEC_DEC_PCM 0
/* Decoder status received from AUDPPTASK */
#define AUDPP_DEC_STATUS_SLEEP 0
#define AUDPP_DEC_STATUS_INIT 1
#define AUDPP_DEC_STATUS_CFG 2
#define AUDPP_DEC_STATUS_PLAY 3
#define AUDPCM_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 audio;
struct buffer {
void *data;
unsigned size;
unsigned used; /* Input usage actual DSP produced PCM size */
unsigned addr;
};
#ifdef CONFIG_HAS_EARLYSUSPEND
struct audpcm_suspend_ctl {
struct early_suspend node;
struct audio *audio;
};
#endif
struct audpcm_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 audpcm_buffer_node {
struct list_head list;
struct msm_audio_aio_buf buf;
unsigned long paddr;
};
struct audio {
struct buffer out[2];
spinlock_t dsp_lock;
uint8_t out_head;
uint8_t out_tail;
uint8_t out_needed; /* number of buffers the dsp is waiting for */
struct list_head out_queue; /* queue to retain output buffers */
atomic_t out_bytes;
struct mutex lock;
struct mutex write_lock;
wait_queue_head_t write_wait;
struct msm_adsp_module *audplay;
/* configuration to use on next enable */
uint32_t out_sample_rate;
uint32_t out_channel_mode;
uint32_t out_bits; /* bits per sample */
struct audmgr audmgr;
/* data allocated for various buffers */
char *data;
int32_t phys;
struct msm_mapped_buffer *map_v_write;
uint32_t drv_status;
int wflush; /* Write flush */
int opened;
int enabled;
int running;
int stopped; /* set when stopped, cleared on flush */
int teos; /* valid only if tunnel mode & no data left for decoder */
int rmt_resource_released;
enum msm_aud_decoder_state dec_state; /* Represents decoder state */
int reserved; /* A byte is being reserved */
char rsv_byte; /* Handle odd length user data */
const char *module_name;
unsigned queue_id;
unsigned long volume;
uint16_t dec_id;
#ifdef CONFIG_HAS_EARLYSUSPEND
struct audpcm_suspend_ctl suspend_ctl;
#endif
#ifdef CONFIG_DEBUG_FS
struct dentry *dentry;
#endif
wait_queue_head_t wait;
struct list_head free_event_queue;
struct list_head event_queue;
wait_queue_head_t event_wait;
spinlock_t event_queue_lock;
struct mutex get_event_lock;
int event_abort;
struct list_head ion_region_queue;
int buffer_count;
int buffer_size;
struct ion_client *client;
};
static int auddec_dsp_config(struct audio *audio, int enable);
static void audpp_cmd_cfg_adec_params(struct audio *audio);
static void audio_dsp_event(void *private, unsigned id, uint16_t *msg);
static void audpcm_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 audpcm_async_send_data(struct audio *audio,
unsigned needed);
static int rmt_put_resource(struct audio *audio)
{
struct aud_codec_config_cmd cmd;
unsigned short client_idx;
cmd.cmd_id = RM_CMD_AUD_CODEC_CFG;
cmd.client_id = RM_AUD_CLIENT_ID;
cmd.task_id = audio->dec_id;
cmd.enable = RMT_DISABLE;
cmd.dec_type = AUDDEC_DEC_PCM;
client_idx = ((cmd.client_id << 8) | cmd.task_id);
return put_adsp_resource(client_idx, &cmd, sizeof(cmd));
}
static int rmt_get_resource(struct audio *audio)
{
struct aud_codec_config_cmd cmd;
unsigned short client_idx;
cmd.cmd_id = RM_CMD_AUD_CODEC_CFG;
cmd.client_id = RM_AUD_CLIENT_ID;
cmd.task_id = audio->dec_id;
cmd.enable = RMT_ENABLE;
cmd.dec_type = AUDDEC_DEC_PCM;
client_idx = ((cmd.client_id << 8) | cmd.task_id);
return get_adsp_resource(client_idx, &cmd, sizeof(cmd));
}
/* must be called with audio->lock held */
static int audio_enable(struct audio *audio)
{
struct audmgr_config cfg;
int rc;
MM_DBG("\n"); /* Macro prints the file name and function */
if (audio->enabled)
return 0;
if (audio->rmt_resource_released == 1) {
audio->rmt_resource_released = 0;
rc = rmt_get_resource(audio);
if (rc)
MM_ERR("ADSP resources are not available");
}
audio->dec_state = MSM_AUD_DECODER_STATE_NONE;
audio->out_tail = 0;
audio->out_needed = 0;
cfg.tx_rate = RPC_AUD_DEF_SAMPLE_RATE_NONE;
cfg.rx_rate = RPC_AUD_DEF_SAMPLE_RATE_48000;
cfg.def_method = RPC_AUD_DEF_METHOD_PLAYBACK;
cfg.codec = RPC_AUD_DEF_CODEC_PCM;
cfg.snd_method = RPC_SND_METHOD_MIDI;
rc = audmgr_enable(&audio->audmgr, &cfg);
if (rc < 0) {
msm_adsp_dump(audio->audplay);
return rc;
}
if (msm_adsp_enable(audio->audplay)) {
MM_ERR("msm_adsp_enable(audplay) failed\n");
audmgr_disable(&audio->audmgr);
return -ENODEV;
}
if (audpp_enable(audio->dec_id, audio_dsp_event, audio)) {
MM_ERR("audpp_enable() failed\n");
msm_adsp_disable(audio->audplay);
audmgr_disable(&audio->audmgr);
return -ENODEV;
}
audio->enabled = 1;
return 0;
}
/* must be called with audio->lock held */
static int audio_disable(struct audio *audio)
{
int rc = 0;
MM_DBG("\n"); /* Macro prints the file name and function */
if (audio->enabled) {
audio->enabled = 0;
audio->dec_state = MSM_AUD_DECODER_STATE_NONE;
auddec_dsp_config(audio, 0);
rc = wait_event_interruptible_timeout(audio->wait,
audio->dec_state != MSM_AUD_DECODER_STATE_NONE,
msecs_to_jiffies(MSM_AUD_DECODER_WAIT_MS));
if (rc == 0)
rc = -ETIMEDOUT;
else if (audio->dec_state != MSM_AUD_DECODER_STATE_CLOSE)
rc = -EFAULT;
else
rc = 0;
audio->stopped = 1;
wake_up(&audio->write_wait);
msm_adsp_disable(audio->audplay);
audpp_disable(audio->dec_id, audio);
rc = audmgr_disable(&audio->audmgr);
if (rc < 0)
msm_adsp_dump(audio->audplay);
audio->out_needed = 0;
rmt_put_resource(audio);
audio->rmt_resource_released = 1;
}
return rc;
}
/* ------------------- dsp --------------------- */
static void audplay_dsp_event(void *data, unsigned id, size_t len,
void (*getevent) (void *ptr, size_t len))
{
struct audio *audio = data;
uint32_t msg[28];
getevent(msg, sizeof(msg));
MM_DBG("msg_id=%x\n", id);
switch (id) {
case AUDPLAY_MSG_DEC_NEEDS_DATA:
audpcm_async_send_data(audio, 1);
break;
case ADSP_MESSAGE_ID:
MM_DBG("Received ADSP event: module enable(audplaytask)\n");
break;
default:
MM_ERR("unexpected message from decoder\n");
break;
}
}
static void audio_dsp_event(void *private, unsigned id, uint16_t *msg)
{
struct audio *audio = private;
switch (id) {
case AUDPP_MSG_STATUS_MSG:{
unsigned status = msg[1];
switch (status) {
case AUDPP_DEC_STATUS_SLEEP: {
uint16_t reason = msg[2];
MM_DBG("decoder status: sleep reason =0x%04x\n",
reason);
if ((reason == AUDPP_MSG_REASON_MEM)
|| (reason ==
AUDPP_MSG_REASON_NODECODER)) {
audio->dec_state =
MSM_AUD_DECODER_STATE_FAILURE;
wake_up(&audio->wait);
} else if (reason == AUDPP_MSG_REASON_NONE) {
/* decoder is in disable state */
audio->dec_state =
MSM_AUD_DECODER_STATE_CLOSE;
wake_up(&audio->wait);
}
break;
}
case AUDPP_DEC_STATUS_INIT:
MM_DBG("decoder status: init\n");
audpp_cmd_cfg_adec_params(audio);
break;
case AUDPP_DEC_STATUS_CFG:
MM_DBG("decoder status: cfg\n");
break;
case AUDPP_DEC_STATUS_PLAY:
MM_DBG("decoder status: play\n");
audio->dec_state =
MSM_AUD_DECODER_STATE_SUCCESS;
wake_up(&audio->wait);
break;
default:
MM_ERR("unknown decoder status\n");
break;
}
break;
}
case AUDPP_MSG_CFG_MSG:
if (msg[0] == AUDPP_MSG_ENA_ENA) {
MM_DBG("CFG_MSG ENABLE\n");
auddec_dsp_config(audio, 1);
audio->out_needed = 0;
audio->running = 1;
audpp_set_volume_and_pan(audio->dec_id, audio->volume,
0);
} else if (msg[0] == AUDPP_MSG_ENA_DIS) {
MM_DBG("CFG_MSG DISABLE\n");
audio->running = 0;
} else {
MM_ERR("CFG_MSG %d?\n", msg[0]);
}
break;
case AUDPP_MSG_FLUSH_ACK:
MM_DBG("FLUSH_ACK\n");
audio->wflush = 0;
wake_up(&audio->write_wait);
break;
case AUDPP_MSG_PCMDMAMISSED:
MM_DBG("PCMDMAMISSED\n");
audio->teos = 1;
wake_up(&audio->write_wait);
break;
default:
MM_ERR("UNKNOWN (%d)\n", id);
}
}
struct msm_adsp_ops audlpadec_adsp_ops = {
.event = audplay_dsp_event,
};
#define audplay_send_queue0(audio, cmd, len) \
msm_adsp_write(audio->audplay, audio->queue_id, \
cmd, len)
static int auddec_dsp_config(struct audio *audio, int enable)
{
u16 cfg_dec_cmd[AUDPP_CMD_CFG_DEC_TYPE_LEN / sizeof(unsigned short)];
memset(cfg_dec_cmd, 0, sizeof(cfg_dec_cmd));
cfg_dec_cmd[0] = AUDPP_CMD_CFG_DEC_TYPE;
if (enable)
cfg_dec_cmd[1 + audio->dec_id] = AUDPP_CMD_UPDATDE_CFG_DEC |
AUDPP_CMD_ENA_DEC_V | AUDDEC_DEC_PCM |
AUDPP_CMD_LPA_MODE;
else
cfg_dec_cmd[1 + audio->dec_id] = AUDPP_CMD_UPDATDE_CFG_DEC |
AUDPP_CMD_DIS_DEC_V;
return audpp_send_queue1(&cfg_dec_cmd, sizeof(cfg_dec_cmd));
}
static void audpp_cmd_cfg_adec_params(struct audio *audio)
{
audpp_cmd_cfg_adec_params_wav cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.common.cmd_id = AUDPP_CMD_CFG_ADEC_PARAMS;
cmd.common.length = AUDPP_CMD_CFG_ADEC_PARAMS_WAV_LEN;
cmd.common.dec_id = audio->dec_id;
cmd.common.input_sampling_frequency = audio->out_sample_rate;
cmd.stereo_cfg = audio->out_channel_mode;
cmd.pcm_width = audio->out_bits;
cmd.sign = 0;
audpp_send_queue2(&cmd, sizeof(cmd));
}
static void audpcm_async_send_data(struct audio *audio, unsigned needed)
{
unsigned long flags;
if (!audio->running)
return;
spin_lock_irqsave(&audio->dsp_lock, flags);
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 payload;
struct audpcm_buffer_node *used_buf;
MM_DBG("consumed\n");
BUG_ON(list_empty(&audio->out_queue));
used_buf = list_first_entry(&audio->out_queue,
struct audpcm_buffer_node, list);
list_del(&used_buf->list);
payload.aio_buf = used_buf->buf;
audpcm_post_event(audio, AUDIO_EVENT_WRITE_DONE,
payload);
kfree(used_buf);
audio->drv_status &= ~ADRV_STATUS_OBUF_GIVEN;
}
}
if (audio->out_needed) {
struct audpcm_buffer_node *next_buf;
audplay_cmd_bitstream_data_avail cmd;
if (!list_empty(&audio->out_queue)) {
next_buf = list_first_entry(&audio->out_queue,
struct audpcm_buffer_node, list);
MM_DBG("next_buf %p\n", next_buf);
if (next_buf) {
MM_DBG("next buf phy %lx len %d\n",
next_buf->paddr, next_buf->buf.data_len);
cmd.cmd_id = AUDPLAY_CMD_BITSTREAM_DATA_AVAIL;
if (next_buf->buf.data_len)
cmd.decoder_id = audio->dec_id;
else {
cmd.decoder_id = -1;
MM_DBG("input EOS signaled\n");
}
cmd.buf_ptr = (unsigned) next_buf->paddr;
cmd.buf_size = next_buf->buf.data_len >> 1;
cmd.partition_number = 0;
/* complete writes to the input buffer */
wmb();
audplay_send_queue0(audio, &cmd, sizeof(cmd));
audio->out_needed = 0;
audio->drv_status |= ADRV_STATUS_OBUF_GIVEN;
}
}
}
spin_unlock_irqrestore(&audio->dsp_lock, flags);
}
/* ------------------- device --------------------- */
static void audpcm_async_flush(struct audio *audio)
{
struct audpcm_buffer_node *buf_node;
struct list_head *ptr, *next;
union msm_audio_event_payload payload;
unsigned long flags;
spin_lock_irqsave(&audio->dsp_lock, flags);
MM_DBG("\n"); /* Macro prints the file name and function */
list_for_each_safe(ptr, next, &audio->out_queue) {
buf_node = list_entry(ptr, struct audpcm_buffer_node, list);
list_del(&buf_node->list);
payload.aio_buf = buf_node->buf;
audpcm_post_event(audio, AUDIO_EVENT_WRITE_DONE,
payload);
kfree(buf_node);
}
audio->drv_status &= ~ADRV_STATUS_OBUF_GIVEN;
audio->out_needed = 0;
atomic_set(&audio->out_bytes, 0);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
}
static void audio_ioport_reset(struct audio *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) {
MM_DBG("fsync in progress\n");
wake_up(&audio->write_wait);
mutex_lock(&audio->write_lock);
audpcm_async_flush(audio);
mutex_unlock(&audio->write_lock);
} else
audpcm_async_flush(audio);
} else {
/* Make sure read/write thread are free from
* sleep and knowing that system is not able
* to process io request at the moment
*/
wake_up(&audio->write_wait);
mutex_lock(&audio->write_lock);
audpcm_async_flush(audio);
mutex_unlock(&audio->write_lock);
}
}
static int audpcm_events_pending(struct audio *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 void audpcm_reset_event_queue(struct audio *audio)
{
unsigned long flags;
struct audpcm_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 audpcm_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 audpcm_event, list);
list_del(&drv_evt->list);
kfree(drv_evt);
}
spin_unlock_irqrestore(&audio->event_queue_lock, flags);
return;
}
static long audpcm_process_event_req(struct audio *audio, void __user *arg)
{
long rc;
struct msm_audio_event usr_evt;
struct audpcm_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, audpcm_events_pending(audio),
msecs_to_jiffies(timeout));
if (rc == 0)
return -ETIMEDOUT;
} else {
rc = wait_event_interruptible(
audio->event_wait, audpcm_events_pending(audio));
}
if (rc < 0)
return rc;
if (audio->event_abort) {
audio->event_abort = 0;
return -ENODEV;
}
spin_lock_irqsave(&audio->event_queue_lock, flags);
if (!list_empty(&audio->event_queue)) {
drv_evt = list_first_entry(&audio->event_queue,
struct audpcm_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_irqrestore(&audio->event_queue_lock, flags);
if (drv_evt && drv_evt->event_type == AUDIO_EVENT_WRITE_DONE) {
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)) {
MM_ERR("[%p]:region (vaddr %p len %ld)"
" clashes with registered region"
" (vaddr %p paddr %p len %ld)\n",
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;
MM_ERR("\n"); /* Macro prints the file name and function */
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;
}
kvaddr = (unsigned long)ion_map_kernel(audio->client, handle);
if (IS_ERR_OR_NULL((void *)kvaddr)) {
pr_err("%s: could not get virtual address\n", __func__);
goto map_error;
}
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) {
MM_ERR("audpcm_ion_check failed\n");
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;
MM_DBG("[%p]:add region paddr %lx vaddr %p, len %lu kvaddr %lx\n",
audio, region->paddr, region->vaddr,
region->len, region->kvaddr);
list_add_tail(&region->list, &audio->ion_region_queue);
return rc;
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) {
MM_DBG("%s[%p]:region %p in use ref_cnt %d\n",
__func__, audio, region,
region->ref_cnt);
break;
}
MM_DBG("remove region fd %d vaddr %p\n",
info->fd, info->vaddr);
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) {
MM_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)
MM_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) {
MM_ERR("%s[%p]:lookup (%p, %ld) failed\n",
__func__, audio, addr, len);
return 0;
}
if (ref_up)
region->ref_cnt++;
else
region->ref_cnt--;
MM_DBG("found region %p ref_cnt %d\n", region, 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)
{
unsigned long flags;
struct audpcm_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;
}
MM_DBG("node %p dir %x buf_addr %p buf_len %d data_len"
"%d\n", buf_node, dir,
buf_node->buf.buf_addr, buf_node->buf.buf_len,
buf_node->buf.data_len);
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;
}
spin_lock_irqsave(&audio->dsp_lock, flags);
list_add_tail(&buf_node->list, &audio->out_queue);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
audpcm_async_send_data(audio, 0);
}
MM_DBG("Add buf_node %p paddr %lx\n", buf_node, buf_node->paddr);
return 0;
}
static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct audio *audio = file->private_data;
int rc = 0;
MM_DBG("cmd = %d\n", cmd);
if (cmd == AUDIO_GET_STATS) {
struct msm_audio_stats stats;
stats.byte_count = audpp_avsync_byte_count(audio->dec_id);
stats.sample_count = audpp_avsync_sample_count(audio->dec_id);
if (copy_to_user((void *) arg, &stats, sizeof(stats)))
return -EFAULT;
return 0;
}
if (cmd == AUDIO_SET_VOLUME) {
unsigned long flags;
spin_lock_irqsave(&audio->dsp_lock, flags);
audio->volume = MSM_VOLUME_STEP * arg;
audio->volume /= MSM_VOLUME_FACTOR;
if (audio->volume > MSM_MAX_VOLUME)
audio->volume = MSM_MAX_VOLUME;
if (audio->running)
audpp_set_volume_and_pan(audio->dec_id,
audio->volume, 0);
spin_unlock_irqrestore(&audio->dsp_lock, flags);
return 0;
}
if (cmd == AUDIO_GET_EVENT) {
MM_DBG("AUDIO_GET_EVENT\n");
if (mutex_trylock(&audio->get_event_lock)) {
rc = audpcm_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:
MM_DBG("AUDIO_START\n");
rc = audio_enable(audio);
if (!rc) {
rc = wait_event_interruptible_timeout(audio->wait,
audio->dec_state != MSM_AUD_DECODER_STATE_NONE,
msecs_to_jiffies(MSM_AUD_DECODER_WAIT_MS));
MM_INFO("dec_state %d rc = %d\n", audio->dec_state, rc);
if (audio->dec_state != MSM_AUD_DECODER_STATE_SUCCESS)
rc = -ENODEV;
else
rc = 0;
}
break;
case AUDIO_STOP:
MM_DBG("AUDIO_STOP\n");
rc = audio_disable(audio);
audio_ioport_reset(audio);
audio->stopped = 0;
break;
case AUDIO_FLUSH:
MM_DBG("AUDIO_FLUSH\n");
audio->wflush = 1;
audio_ioport_reset(audio);
if (audio->running) {
audpp_flush(audio->dec_id);
rc = wait_event_interruptible(audio->write_wait,
!audio->wflush);
if (rc < 0) {
MM_ERR("AUDIO_FLUSH interrupted\n");
rc = -EINTR;
}
} else {
audio->wflush = 0;
}
break;
case AUDIO_SET_CONFIG: {
struct msm_audio_config config;
if (copy_from_user(&config, (void *) arg, sizeof(config))) {
rc = -EFAULT;
break;
}
if (config.channel_count == 1) {
config.channel_count = AUDPP_CMD_PCM_INTF_MONO_V;
} else if (config.channel_count == 2) {
config.channel_count = AUDPP_CMD_PCM_INTF_STEREO_V;
} else {
rc = -EINVAL;
break;
}
if (config.bits == 8)
config.bits = AUDPP_CMD_WAV_PCM_WIDTH_8;
else if (config.bits == 16)
config.bits = AUDPP_CMD_WAV_PCM_WIDTH_16;
else {
rc = -EINVAL;
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;
MM_DBG("AUDIO_SET_CONFIG\n");
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;
if (audio->out_channel_mode == AUDPP_CMD_PCM_INTF_MONO_V)
config.channel_count = 1;
else
config.channel_count = 2;
if (audio->out_bits == AUDPP_CMD_WAV_PCM_WIDTH_8)
config.bits = 8;
else if (audio->out_bits == AUDPP_CMD_WAV_PCM_WIDTH_16)
config.bits = 16;
else
config.bits = 16;
config.unused[0] = 0;
config.unused[1] = 0;
if (copy_to_user((void *) arg, &config, sizeof(config)))
rc = -EFAULT;
else
rc = 0;
MM_DBG("AUDIO_GET_CONFIG\n");
break;
}
case AUDIO_PAUSE:
MM_DBG("AUDIO_PAUSE %ld\n", arg);
rc = audpp_pause(audio->dec_id, (int) arg);
break;
case AUDIO_REGISTER_ION: {
struct msm_audio_ion_info info;
MM_ERR("AUDIO_REGISTER_ION\n");
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;
MM_ERR("AUDIO_DEREGISTER_ION\n");
if (copy_from_user(&info, (void *) arg, sizeof(info)))
rc = -EFAULT;
else
rc = audlpa_ion_remove(audio, &info);
break;
}
case AUDIO_ASYNC_WRITE:
if (audio->drv_status & ADRV_STATUS_FSYNC)
rc = -EBUSY;
else
rc = audlpa_aio_buf_add(audio, 1, (void __user *) arg);
break;
case AUDIO_ASYNC_READ:
MM_ERR("AUDIO_ASYNC_READ not supported\n");
rc = -EPERM;
break;
default:
rc = -EINVAL;
}
mutex_unlock(&audio->lock);
return rc;
}
/* Only useful in tunnel-mode */
int audlpa_async_fsync(struct audio *audio)
{
int rc = 0;
MM_DBG("\n"); /* Macro prints the file name and function */
/* Blocking client sends more data */
mutex_lock(&audio->lock);
audio->drv_status |= ADRV_STATUS_FSYNC;
mutex_unlock(&audio->lock);
mutex_lock(&audio->write_lock);
/* pcm dmamiss message is sent continously
* when decoder is starved so no race
* condition concern
*/
audio->teos = 0;
rc = wait_event_interruptible(audio->write_wait,
(audio->teos && audio->out_needed &&
list_empty(&audio->out_queue))
|| audio->wflush || audio->stopped);
if (audio->stopped || audio->wflush)
rc = -EBUSY;
mutex_unlock(&audio->write_lock);
mutex_lock(&audio->lock);
audio->drv_status &= ~ADRV_STATUS_FSYNC;
mutex_unlock(&audio->lock);
return rc;
}
int audlpa_sync_fsync(struct audio *audio)
{
struct buffer *frame;
int rc = 0;
MM_DBG("\n"); /* Macro prints the file name and function */
mutex_lock(&audio->write_lock);
rc = wait_event_interruptible(audio->write_wait,
(!audio->out[0].used &&
!audio->out[1].used &&
audio->out_needed) || audio->wflush);
if (rc < 0)
goto done;
else if (audio->wflush) {
rc = -EBUSY;
goto done;
}
if (audio->reserved) {
MM_DBG("send reserved byte\n");
frame = audio->out + audio->out_tail;
((char *) frame->data)[0] = audio->rsv_byte;
((char *) frame->data)[1] = 0;
frame->used = 2;
audpcm_async_send_data(audio, 0);
rc = wait_event_interruptible(audio->write_wait,
(!audio->out[0].used &&
!audio->out[1].used &&
audio->out_needed) || audio->wflush);
if (rc < 0)
goto done;
else if (audio->wflush) {
rc = -EBUSY;
goto done;
}
}
/* pcm dmamiss message is sent continously
* when decoder is starved so no race
* condition concern
*/
audio->teos = 0;
rc = wait_event_interruptible(audio->write_wait,
audio->teos || audio->wflush);
if (audio->wflush)
rc = -EBUSY;
done:
mutex_unlock(&audio->write_lock);
return rc;
}
int audlpa_fsync(struct file *file, loff_t a, loff_t b,
int datasync)
{
struct audio *audio = file->private_data;
if (!audio->running)
return -EINVAL;
return audlpa_async_fsync(audio);
}
static void audpcm_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 int audio_release(struct inode *inode, struct file *file)
{
struct audio *audio = file->private_data;
MM_DBG("audio instance 0x%08x freeing\n", (int)audio);
mutex_lock(&audio->lock);
audio_disable(audio);
if (audio->rmt_resource_released == 0)
rmt_put_resource(audio);
audpcm_async_flush(audio);
audpcm_reset_ion_region(audio);
msm_adsp_put(audio->audplay);
audpp_adec_free(audio->dec_id);
#ifdef CONFIG_HAS_EARLYSUSPEND
unregister_early_suspend(&audio->suspend_ctl.node);
#endif
audio->opened = 0;
audio->event_abort = 1;
wake_up(&audio->event_wait);
audpcm_reset_event_queue(audio);
mutex_unlock(&audio->lock);
#ifdef CONFIG_DEBUG_FS
if (audio->dentry)
debugfs_remove(audio->dentry);
#endif
ion_client_destroy(audio->client);
kfree(audio);
return 0;
}
static void audpcm_post_event(struct audio *audio, int type,
union msm_audio_event_payload payload)
{
struct audpcm_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 audpcm_event, list);
list_del(&e_node->list);
} else {
e_node = kmalloc(sizeof(struct audpcm_event), GFP_ATOMIC);
if (!e_node) {
MM_ERR("No mem to post event %d\n", 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);
}
#ifdef CONFIG_HAS_EARLYSUSPEND
static void audpcm_suspend(struct early_suspend *h)
{
struct audpcm_suspend_ctl *ctl =
container_of(h, struct audpcm_suspend_ctl, node);
union msm_audio_event_payload payload;
MM_DBG("\n"); /* Macro prints the file name and function */
audpcm_post_event(ctl->audio, AUDIO_EVENT_SUSPEND, payload);
}
static void audpcm_resume(struct early_suspend *h)
{
struct audpcm_suspend_ctl *ctl =
container_of(h, struct audpcm_suspend_ctl, node);
union msm_audio_event_payload payload;
MM_DBG("\n"); /* Macro prints the file name and function */
audpcm_post_event(ctl->audio, AUDIO_EVENT_RESUME, payload);
}
#endif
#ifdef CONFIG_DEBUG_FS
static ssize_t audpcm_debug_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static ssize_t audpcm_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,
"enabled %d\n", audio->enabled);
n += scnprintf(buffer + n, debug_bufmax - n,
"stopped %d\n", audio->stopped);
n += scnprintf(buffer + n, debug_bufmax - n,
"out_buf_sz %d\n", audio->out[0].size);
n += scnprintf(buffer + n, debug_bufmax - n,
"volume %lx\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,
"dec state %d\n", audio->dec_state);
n += scnprintf(buffer + n, debug_bufmax - n,
"out_needed %d\n", audio->out_needed);
n += scnprintf(buffer + n, debug_bufmax - n,
"out_head %d\n", audio->out_head);
n += scnprintf(buffer + n, debug_bufmax - n,
"out_tail %d\n", audio->out_tail);
n += scnprintf(buffer + n, debug_bufmax - n,
"out[0].used %d\n", audio->out[0].used);
n += scnprintf(buffer + n, debug_bufmax - n,
"out[1].used %d\n", audio->out[1].used);
buffer[n] = 0;
return simple_read_from_buffer(buf, count, ppos, buffer, n);
}
static const struct file_operations audpcm_debug_fops = {
.read = audpcm_debug_read,
.open = audpcm_debug_open,
};
#endif
static int audio_open(struct inode *inode, struct file *file)
{
struct audio *audio = NULL;
int rc, i, dec_attrb, decid;
struct audpcm_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
/* Allocate audio instance, set to zero */
audio = kzalloc(sizeof(struct audio), GFP_KERNEL);
if (!audio) {
MM_ERR("no memory to allocate audio instance\n");
rc = -ENOMEM;
goto done;
}
MM_DBG("audio instance 0x%08x created\n", (int)audio);
/* Allocate the decoder */
dec_attrb = AUDDEC_DEC_PCM;
if (file->f_mode & FMODE_READ) {
MM_ERR("Non-Tunneled mode not supported\n");
rc = -EPERM;
kfree(audio);
goto done;
} else
dec_attrb |= MSM_AUD_MODE_TUNNEL;
decid = audpp_adec_alloc(dec_attrb, &audio->module_name,
&audio->queue_id);
if (decid < 0) {
MM_ERR("No free decoder available\n");
rc = -ENODEV;
MM_DBG("audio instance 0x%08x freeing\n", (int)audio);
kfree(audio);
goto done;
}
audio->dec_id = decid & MSM_AUD_DECODER_MASK;
audio->buffer_size = BUFSZ;
audio->buffer_count = MAX_BUF;
rc = audmgr_open(&audio->audmgr);
if (rc)
goto err;
rc = msm_adsp_get(audio->module_name, &audio->audplay,
&audlpadec_adsp_ops, audio);
if (rc) {
MM_ERR("failed to get %s module\n", audio->module_name);
audmgr_close(&audio->audmgr);
goto err;
}
rc = rmt_get_resource(audio);
if (rc) {
MM_ERR("ADSP resources are not available for PCM session");
audmgr_close(&audio->audmgr);
msm_adsp_put(audio->audplay);
goto err;
}
/* 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);
audio->out_sample_rate = 44100;
audio->out_channel_mode = AUDPP_CMD_PCM_INTF_STEREO_V;
audio->out_bits = AUDPP_CMD_WAV_PCM_WIDTH_16;
audio->volume = 0x2000;
audpcm_async_flush(audio);
file->private_data = audio;
audio->opened = 1;
#ifdef CONFIG_DEBUG_FS
snprintf(name, sizeof name, "msm_pcm_lp_dec_%04x", audio->dec_id);
audio->dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
NULL, (void *) audio, &audpcm_debug_fops);
if (IS_ERR(audio->dentry))
MM_DBG("debugfs_create_file failed\n");
#endif
#ifdef CONFIG_HAS_EARLYSUSPEND
audio->suspend_ctl.node.level = EARLY_SUSPEND_LEVEL_DISABLE_FB;
audio->suspend_ctl.node.resume = audpcm_resume;
audio->suspend_ctl.node.suspend = audpcm_suspend;
audio->suspend_ctl.audio = audio;
register_early_suspend(&audio->suspend_ctl.node);
#endif
for (i = 0; i < AUDPCM_EVENT_NUM; i++) {
e_node = kmalloc(sizeof(struct audpcm_event), GFP_KERNEL);
if (e_node)
list_add_tail(&e_node->list, &audio->free_event_queue);
else {
MM_ERR("event pkt alloc failed\n");
break;
}
}
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;
}
MM_DBG("Ion client created\n");
done:
return rc;
err:
audpp_adec_free(audio->dec_id);
MM_DBG("audio instance 0x%08x freeing\n", (int)audio);
kfree(audio);
return rc;
}
static const struct file_operations audio_pcm_lp_fops = {
.owner = THIS_MODULE,
.open = audio_open,
.release = audio_release,
.unlocked_ioctl = audio_ioctl,
.fsync = audlpa_fsync,
};
struct miscdevice audio_lpa_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_pcm_lp_dec",
.fops = &audio_pcm_lp_fops,
};
static int __init audio_init(void)
{
return misc_register(&audio_lpa_misc);
}
device_initcall(audio_init);
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