| /* arch/arm/mach-msm/audio_evrc.c |
| * |
| * Copyright (c) 2008 QUALCOMM USA, INC. |
| * |
| * This code also borrows from audio_aac.c, which is |
| * Copyright (C) 2008 Google, Inc. |
| * Copyright (C) 2008 HTC Corporation |
| * |
| * 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. |
| * 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 <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/delay.h> |
| #include <linux/gfp.h> |
| |
| #include <asm/atomic.h> |
| #include <asm/ioctls.h> |
| #include <mach/msm_adsp.h> |
| #include <linux/msm_audio.h> |
| #include "audmgr.h" |
| |
| #include <mach/qdsp5/qdsp5audppcmdi.h> |
| #include <mach/qdsp5/qdsp5audppmsg.h> |
| #include <mach/qdsp5/qdsp5audplaycmdi.h> |
| #include <mach/qdsp5/qdsp5audplaymsg.h> |
| |
| #include "adsp.h" |
| |
| #ifdef DEBUG |
| #define dprintk(format, arg...) \ |
| printk(KERN_DEBUG format, ## arg) |
| #else |
| #define dprintk(format, arg...) do {} while (0) |
| #endif |
| |
| /* Hold 30 packets of 24 bytes each*/ |
| #define BUFSZ 720 |
| #define DMASZ (BUFSZ * 2) |
| |
| #define AUDDEC_DEC_EVRC 12 |
| |
| #define PCM_BUFSZ_MIN 1600 /* 100ms worth of data */ |
| #define PCM_BUF_MAX_COUNT 5 |
| /* DSP only accepts 5 buffers at most |
| * but support 2 buffers currently |
| */ |
| #define EVRC_DECODED_FRSZ 320 /* EVRC 20ms 8KHz mono PCM size */ |
| |
| #define ROUTING_MODE_FTRT 1 |
| #define ROUTING_MODE_RT 2 |
| /* 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 |
| |
| struct buffer { |
| void *data; |
| unsigned size; |
| unsigned used; /* Input usage actual DSP produced PCM size */ |
| unsigned addr; |
| }; |
| |
| 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 */ |
| |
| atomic_t out_bytes; |
| |
| struct mutex lock; |
| struct mutex write_lock; |
| wait_queue_head_t write_wait; |
| |
| /* Host PCM section */ |
| struct buffer in[PCM_BUF_MAX_COUNT]; |
| struct mutex read_lock; |
| wait_queue_head_t read_wait; /* Wait queue for read */ |
| char *read_data; /* pointer to reader buffer */ |
| dma_addr_t read_phys; /* physical address of reader buffer */ |
| uint8_t read_next; /* index to input buffers to be read next */ |
| uint8_t fill_next; /* index to buffer that DSP should be filling */ |
| uint8_t pcm_buf_count; /* number of pcm buffer allocated */ |
| /* ---- End of Host PCM section */ |
| |
| struct msm_adsp_module *audplay; |
| struct audmgr audmgr; |
| |
| /* data allocated for various buffers */ |
| char *data; |
| dma_addr_t phys; |
| |
| uint8_t opened:1; |
| uint8_t enabled:1; |
| uint8_t running:1; |
| uint8_t stopped:1; /* set when stopped, cleared on flush */ |
| uint8_t pcm_feedback:1; |
| uint8_t buf_refresh:1; |
| |
| unsigned volume; |
| uint16_t dec_id; |
| uint32_t read_ptr_offset; |
| }; |
| static struct audio the_evrc_audio; |
| |
| static int auddec_dsp_config(struct audio *audio, int enable); |
| static void audpp_cmd_cfg_adec_params(struct audio *audio); |
| static void audpp_cmd_cfg_routing_mode(struct audio *audio); |
| static void audevrc_send_data(struct audio *audio, unsigned needed); |
| static void audevrc_dsp_event(void *private, unsigned id, uint16_t *msg); |
| static void audevrc_config_hostpcm(struct audio *audio); |
| static void audevrc_buffer_refresh(struct audio *audio); |
| |
| /* must be called with audio->lock held */ |
| static int audevrc_enable(struct audio *audio) |
| { |
| struct audmgr_config cfg; |
| int rc; |
| |
| if (audio->enabled) |
| return 0; |
| |
| 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_EVRC; |
| cfg.snd_method = RPC_SND_METHOD_MIDI; |
| |
| rc = audmgr_enable(&audio->audmgr, &cfg); |
| if (rc < 0) |
| return rc; |
| |
| if (msm_adsp_enable(audio->audplay)) { |
| pr_err("audio: msm_adsp_enable(audplay) failed\n"); |
| audmgr_disable(&audio->audmgr); |
| return -ENODEV; |
| } |
| |
| if (audpp_enable(audio->dec_id, audevrc_dsp_event, audio)) { |
| pr_err("audio: 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 audevrc_disable(struct audio *audio) |
| { |
| if (audio->enabled) { |
| audio->enabled = 0; |
| auddec_dsp_config(audio, 0); |
| wake_up(&audio->write_wait); |
| wake_up(&audio->read_wait); |
| msm_adsp_disable(audio->audplay); |
| audpp_disable(audio->dec_id, audio); |
| audmgr_disable(&audio->audmgr); |
| audio->out_needed = 0; |
| } |
| return 0; |
| } |
| |
| /* ------------------- dsp --------------------- */ |
| |
| static void audevrc_update_pcm_buf_entry(struct audio *audio, |
| uint32_t *payload) |
| { |
| uint8_t index; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&audio->dsp_lock, flags); |
| for (index = 0; index < payload[1]; index++) { |
| if (audio->in[audio->fill_next].addr |
| == payload[2 + index * 2]) { |
| dprintk("audevrc_update_pcm_buf_entry: in[%d] ready\n", |
| audio->fill_next); |
| audio->in[audio->fill_next].used = |
| payload[3 + index * 2]; |
| if ((++audio->fill_next) == audio->pcm_buf_count) |
| audio->fill_next = 0; |
| |
| } else { |
| pr_err |
| ("audevrc_update_pcm_buf_entry: expected=%x ret=%x\n", |
| audio->in[audio->fill_next].addr, |
| payload[1 + index * 2]); |
| break; |
| } |
| } |
| if (audio->in[audio->fill_next].used == 0) { |
| audevrc_buffer_refresh(audio); |
| } else { |
| dprintk("audevrc_update_pcm_buf_entry: read cannot keep up\n"); |
| audio->buf_refresh = 1; |
| } |
| |
| spin_unlock_irqrestore(&audio->dsp_lock, flags); |
| wake_up(&audio->read_wait); |
| } |
| |
| 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)); |
| |
| dprintk("audplay_dsp_event: msg_id=%x\n", id); |
| switch (id) { |
| case AUDPLAY_MSG_DEC_NEEDS_DATA: |
| audevrc_send_data(audio, 1); |
| break; |
| case AUDPLAY_MSG_BUFFER_UPDATE: |
| dprintk("audevrc_update_pcm_buf_entry:======> \n"); |
| audevrc_update_pcm_buf_entry(audio, msg); |
| break; |
| default: |
| pr_err("unexpected message from decoder \n"); |
| } |
| } |
| |
| static void audevrc_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: |
| dprintk("decoder status: sleep \n"); |
| break; |
| |
| case AUDPP_DEC_STATUS_INIT: |
| dprintk("decoder status: init \n"); |
| audpp_cmd_cfg_routing_mode(audio); |
| break; |
| |
| case AUDPP_DEC_STATUS_CFG: |
| dprintk("decoder status: cfg \n"); |
| break; |
| case AUDPP_DEC_STATUS_PLAY: |
| dprintk("decoder status: play \n"); |
| if (audio->pcm_feedback) { |
| audevrc_config_hostpcm(audio); |
| audevrc_buffer_refresh(audio); |
| } |
| break; |
| default: |
| pr_err("unknown decoder status \n"); |
| } |
| break; |
| } |
| case AUDPP_MSG_CFG_MSG: |
| if (msg[0] == AUDPP_MSG_ENA_ENA) { |
| dprintk("audevrc_dsp_event: 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); |
| audpp_avsync(audio->dec_id, 22050); |
| } else if (msg[0] == AUDPP_MSG_ENA_DIS) { |
| dprintk("audevrc_dsp_event: CFG_MSG DISABLE\n"); |
| audpp_avsync(audio->dec_id, 0); |
| audio->running = 0; |
| } else { |
| pr_err("audevrc_dsp_event: CFG_MSG %d?\n", msg[0]); |
| } |
| break; |
| case AUDPP_MSG_ROUTING_ACK: |
| dprintk("audevrc_dsp_event: ROUTING_ACK\n"); |
| audpp_cmd_cfg_adec_params(audio); |
| break; |
| |
| default: |
| pr_err("audevrc_dsp_event: UNKNOWN (%d)\n", id); |
| } |
| |
| } |
| |
| struct msm_adsp_ops audplay_adsp_ops_evrc = { |
| .event = audplay_dsp_event, |
| }; |
| |
| #define audplay_send_queue0(audio, cmd, len) \ |
| msm_adsp_write(audio->audplay, QDSP_uPAudPlay0BitStreamCtrlQueue, \ |
| cmd, len) |
| |
| static int auddec_dsp_config(struct audio *audio, int enable) |
| { |
| audpp_cmd_cfg_dec_type cmd; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.cmd_id = AUDPP_CMD_CFG_DEC_TYPE; |
| if (enable) |
| cmd.dec0_cfg = AUDPP_CMD_UPDATDE_CFG_DEC | |
| AUDPP_CMD_ENA_DEC_V | AUDDEC_DEC_EVRC; |
| else |
| cmd.dec0_cfg = AUDPP_CMD_UPDATDE_CFG_DEC | AUDPP_CMD_DIS_DEC_V; |
| |
| return audpp_send_queue1(&cmd, sizeof(cmd)); |
| } |
| |
| static void audpp_cmd_cfg_adec_params(struct audio *audio) |
| { |
| struct audpp_cmd_cfg_adec_params_evrc cmd; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.common.cmd_id = AUDPP_CMD_CFG_ADEC_PARAMS; |
| cmd.common.length = sizeof(cmd); |
| cmd.common.dec_id = audio->dec_id; |
| cmd.common.input_sampling_frequency = 8000; |
| cmd.stereo_cfg = AUDPP_CMD_PCM_INTF_MONO_V; |
| |
| audpp_send_queue2(&cmd, sizeof(cmd)); |
| } |
| |
| static void audpp_cmd_cfg_routing_mode(struct audio *audio) |
| { |
| struct audpp_cmd_routing_mode cmd; |
| dprintk("audpp_cmd_cfg_routing_mode()\n"); |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.cmd_id = AUDPP_CMD_ROUTING_MODE; |
| cmd.object_number = audio->dec_id; |
| if (audio->pcm_feedback) |
| cmd.routing_mode = ROUTING_MODE_FTRT; |
| else |
| cmd.routing_mode = ROUTING_MODE_RT; |
| |
| audpp_send_queue1(&cmd, sizeof(cmd)); |
| } |
| |
| static int audplay_dsp_send_data_avail(struct audio *audio, |
| unsigned idx, unsigned len) |
| { |
| audplay_cmd_bitstream_data_avail cmd; |
| |
| cmd.cmd_id = AUDPLAY_CMD_BITSTREAM_DATA_AVAIL; |
| cmd.decoder_id = audio->dec_id; |
| cmd.buf_ptr = audio->out[idx].addr; |
| cmd.buf_size = len / 2; |
| cmd.partition_number = 0; |
| return audplay_send_queue0(audio, &cmd, sizeof(cmd)); |
| } |
| |
| static void audevrc_buffer_refresh(struct audio *audio) |
| { |
| struct audplay_cmd_buffer_refresh refresh_cmd; |
| |
| refresh_cmd.cmd_id = AUDPLAY_CMD_BUFFER_REFRESH; |
| refresh_cmd.num_buffers = 1; |
| refresh_cmd.buf0_address = audio->in[audio->fill_next].addr; |
| refresh_cmd.buf0_length = audio->in[audio->fill_next].size; |
| |
| refresh_cmd.buf_read_count = 0; |
| dprintk("audplay_buffer_fresh: buf0_addr=%x buf0_len=%d\n", |
| refresh_cmd.buf0_address, refresh_cmd.buf0_length); |
| audplay_send_queue0(audio, &refresh_cmd, sizeof(refresh_cmd)); |
| } |
| |
| static void audevrc_config_hostpcm(struct audio *audio) |
| { |
| struct audplay_cmd_hpcm_buf_cfg cfg_cmd; |
| |
| dprintk("audevrc_config_hostpcm()\n"); |
| cfg_cmd.cmd_id = AUDPLAY_CMD_HPCM_BUF_CFG; |
| cfg_cmd.max_buffers = 1; |
| cfg_cmd.byte_swap = 0; |
| cfg_cmd.hostpcm_config = (0x8000) | (0x4000); |
| cfg_cmd.feedback_frequency = 1; |
| cfg_cmd.partition_number = 0; |
| audplay_send_queue0(audio, &cfg_cmd, sizeof(cfg_cmd)); |
| |
| } |
| |
| static void audevrc_send_data(struct audio *audio, unsigned needed) |
| { |
| struct buffer *frame; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&audio->dsp_lock, flags); |
| if (!audio->running) |
| goto done; |
| |
| if (needed) { |
| /* We were called from the callback because the DSP |
| * requested more data. Note that the DSP does want |
| * more data, and if a buffer was in-flight, mark it |
| * as available (since the DSP must now be done with |
| * it). |
| */ |
| audio->out_needed = 1; |
| frame = audio->out + audio->out_tail; |
| if (frame->used == 0xffffffff) { |
| dprintk("frame %d free\n", audio->out_tail); |
| frame->used = 0; |
| audio->out_tail ^= 1; |
| wake_up(&audio->write_wait); |
| } |
| } |
| |
| if (audio->out_needed) { |
| /* If the DSP currently wants data and we have a |
| * buffer available, we will send it and reset |
| * the needed flag. We'll mark the buffer as in-flight |
| * so that it won't be recycled until the next buffer |
| * is requested |
| */ |
| |
| frame = audio->out + audio->out_tail; |
| if (frame->used) { |
| BUG_ON(frame->used == 0xffffffff); |
| dprintk("frame %d busy\n", audio->out_tail); |
| audplay_dsp_send_data_avail(audio, audio->out_tail, |
| frame->used); |
| frame->used = 0xffffffff; |
| audio->out_needed = 0; |
| } |
| } |
| done: |
| spin_unlock_irqrestore(&audio->dsp_lock, flags); |
| } |
| |
| /* ------------------- device --------------------- */ |
| |
| static void audevrc_flush(struct audio *audio) |
| { |
| audio->out[0].used = 0; |
| audio->out[1].used = 0; |
| audio->out_head = 0; |
| audio->out_tail = 0; |
| audio->stopped = 0; |
| atomic_set(&audio->out_bytes, 0); |
| } |
| |
| static void audevrc_flush_pcm_buf(struct audio *audio) |
| { |
| uint8_t index; |
| |
| for (index = 0; index < PCM_BUF_MAX_COUNT; index++) |
| audio->in[index].used = 0; |
| |
| audio->read_next = 0; |
| audio->fill_next = 0; |
| } |
| |
| static long audevrc_ioctl(struct file *file, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct audio *audio = file->private_data; |
| int rc = 0; |
| |
| dprintk("audevrc_ioctl() 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 = arg; |
| if (audio->running) |
| audpp_set_volume_and_pan(audio->dec_id, arg, 0); |
| spin_unlock_irqrestore(&audio->dsp_lock, flags); |
| return 0; |
| } |
| mutex_lock(&audio->lock); |
| switch (cmd) { |
| case AUDIO_START: |
| rc = audevrc_enable(audio); |
| break; |
| case AUDIO_STOP: |
| rc = audevrc_disable(audio); |
| audio->stopped = 1; |
| break; |
| case AUDIO_SET_CONFIG:{ |
| dprintk("AUDIO_SET_CONFIG not applicable \n"); |
| break; |
| } |
| case AUDIO_GET_CONFIG:{ |
| struct msm_audio_config config; |
| config.buffer_size = BUFSZ; |
| config.buffer_count = 2; |
| config.sample_rate = 8000; |
| config.channel_count = 1; |
| config.unused[0] = 0; |
| config.unused[1] = 0; |
| config.unused[2] = 0; |
| config.unused[3] = 0; |
| if (copy_to_user((void *)arg, &config, sizeof(config))) |
| rc = -EFAULT; |
| else |
| rc = 0; |
| break; |
| } |
| case AUDIO_GET_PCM_CONFIG:{ |
| struct msm_audio_pcm_config config; |
| config.pcm_feedback = 0; |
| config.buffer_count = PCM_BUF_MAX_COUNT; |
| config.buffer_size = PCM_BUFSZ_MIN; |
| if (copy_to_user((void *)arg, &config, sizeof(config))) |
| rc = -EFAULT; |
| else |
| rc = 0; |
| break; |
| } |
| case AUDIO_SET_PCM_CONFIG:{ |
| struct msm_audio_pcm_config config; |
| if (copy_from_user |
| (&config, (void *)arg, sizeof(config))) { |
| rc = -EFAULT; |
| break; |
| } |
| if ((config.buffer_count > PCM_BUF_MAX_COUNT) || |
| (config.buffer_count == 1)) |
| config.buffer_count = PCM_BUF_MAX_COUNT; |
| |
| if (config.buffer_size < PCM_BUFSZ_MIN) |
| config.buffer_size = PCM_BUFSZ_MIN; |
| |
| /* Check if pcm feedback is required */ |
| if ((config.pcm_feedback) && (!audio->read_data)) { |
| dprintk("audevrc_ioctl: allocate PCM buf %d\n", |
| config.buffer_count * |
| config.buffer_size); |
| audio->read_data = |
| dma_alloc_coherent(NULL, |
| config.buffer_size * |
| config.buffer_count, |
| &audio->read_phys, |
| GFP_KERNEL); |
| if (!audio->read_data) { |
| pr_err |
| ("audevrc_ioctl: no mem for pcm buf\n"); |
| rc = -1; |
| } else { |
| uint8_t index; |
| uint32_t offset = 0; |
| audio->pcm_feedback = 1; |
| audio->buf_refresh = 0; |
| audio->pcm_buf_count = |
| config.buffer_count; |
| audio->read_next = 0; |
| audio->fill_next = 0; |
| |
| for (index = 0; |
| index < config.buffer_count; |
| index++) { |
| audio->in[index].data = |
| audio->read_data + offset; |
| audio->in[index].addr = |
| audio->read_phys + offset; |
| audio->in[index].size = |
| config.buffer_size; |
| audio->in[index].used = 0; |
| offset += config.buffer_size; |
| } |
| rc = 0; |
| } |
| } else { |
| rc = 0; |
| } |
| break; |
| } |
| case AUDIO_PAUSE: |
| dprintk("%s: AUDIO_PAUSE %ld\n", __func__, arg); |
| rc = audpp_pause(audio->dec_id, (int) arg); |
| break; |
| default: |
| rc = -EINVAL; |
| } |
| mutex_unlock(&audio->lock); |
| return rc; |
| } |
| |
| static ssize_t audevrc_read(struct file *file, char __user *buf, size_t count, |
| loff_t *pos) |
| { |
| struct audio *audio = file->private_data; |
| const char __user *start = buf; |
| int rc = 0; |
| if (!audio->pcm_feedback) { |
| return 0; |
| /* PCM feedback is not enabled. Nothing to read */ |
| } |
| mutex_lock(&audio->read_lock); |
| dprintk("audevrc_read() \n"); |
| while (count > 0) { |
| rc = wait_event_interruptible(audio->read_wait, |
| (audio->in[audio->read_next]. |
| used > 0) || (audio->stopped)); |
| dprintk("audevrc_read() wait terminated \n"); |
| if (rc < 0) |
| break; |
| if (audio->stopped) { |
| rc = -EBUSY; |
| break; |
| } |
| if (count < audio->in[audio->read_next].used) { |
| /* Read must happen in frame boundary. Since driver does |
| * not know frame size, read count must be greater or |
| * equal to size of PCM samples |
| */ |
| dprintk("audevrc_read:read stop - partial frame\n"); |
| break; |
| } else { |
| dprintk("audevrc_read: read from in[%d]\n", |
| audio->read_next); |
| if (copy_to_user |
| (buf, audio->in[audio->read_next].data, |
| audio->in[audio->read_next].used)) { |
| pr_err("audevrc_read: invalid addr %x \n", |
| (unsigned int)buf); |
| rc = -EFAULT; |
| break; |
| } |
| count -= audio->in[audio->read_next].used; |
| buf += audio->in[audio->read_next].used; |
| audio->in[audio->read_next].used = 0; |
| if ((++audio->read_next) == audio->pcm_buf_count) |
| audio->read_next = 0; |
| if (audio->in[audio->read_next].used == 0) |
| break; /* No data ready at this moment |
| * Exit while loop to prevent |
| * output thread sleep too long |
| */ |
| |
| } |
| } |
| if (audio->buf_refresh) { |
| audio->buf_refresh = 0; |
| dprintk("audevrc_read: kick start pcm feedback again\n"); |
| audevrc_buffer_refresh(audio); |
| } |
| mutex_unlock(&audio->read_lock); |
| if (buf > start) |
| rc = buf - start; |
| dprintk("audevrc_read: read %d bytes\n", rc); |
| return rc; |
| } |
| |
| static ssize_t audevrc_write(struct file *file, const char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| struct audio *audio = file->private_data; |
| const char __user *start = buf; |
| struct buffer *frame; |
| size_t xfer; |
| int rc = 0; |
| |
| if (count & 1) |
| return -EINVAL; |
| mutex_lock(&audio->write_lock); |
| dprintk("audevrc_write() \n"); |
| while (count > 0) { |
| frame = audio->out + audio->out_head; |
| rc = wait_event_interruptible(audio->write_wait, |
| (frame->used == 0) |
| || (audio->stopped)); |
| if (rc < 0) |
| break; |
| if (audio->stopped) { |
| rc = -EBUSY; |
| break; |
| } |
| xfer = (count > frame->size) ? frame->size : count; |
| if (copy_from_user(frame->data, buf, xfer)) { |
| rc = -EFAULT; |
| break; |
| } |
| |
| frame->used = xfer; |
| audio->out_head ^= 1; |
| count -= xfer; |
| buf += xfer; |
| |
| audevrc_send_data(audio, 0); |
| |
| } |
| mutex_unlock(&audio->write_lock); |
| if (buf > start) |
| return buf - start; |
| return rc; |
| } |
| |
| static int audevrc_release(struct inode *inode, struct file *file) |
| { |
| struct audio *audio = file->private_data; |
| |
| dprintk("audevrc_release()\n"); |
| |
| mutex_lock(&audio->lock); |
| audevrc_disable(audio); |
| audevrc_flush(audio); |
| audevrc_flush_pcm_buf(audio); |
| msm_adsp_put(audio->audplay); |
| audio->audplay = NULL; |
| audio->opened = 0; |
| dma_free_coherent(NULL, DMASZ, audio->data, audio->phys); |
| audio->data = NULL; |
| if (audio->read_data != NULL) { |
| dma_free_coherent(NULL, |
| audio->in[0].size * audio->pcm_buf_count, |
| audio->read_data, audio->read_phys); |
| audio->read_data = NULL; |
| } |
| audio->pcm_feedback = 0; |
| mutex_unlock(&audio->lock); |
| return 0; |
| } |
| |
| static struct audio the_evrc_audio; |
| |
| static int audevrc_open(struct inode *inode, struct file *file) |
| { |
| struct audio *audio = &the_evrc_audio; |
| int rc; |
| |
| if (audio->opened) { |
| pr_err("audio: busy\n"); |
| return -EBUSY; |
| } |
| |
| /* Acquire Lock */ |
| mutex_lock(&audio->lock); |
| |
| if (!audio->data) { |
| audio->data = dma_alloc_coherent(NULL, DMASZ, |
| &audio->phys, GFP_KERNEL); |
| if (!audio->data) { |
| pr_err("audio: could not allocate DMA buffers\n"); |
| rc = -ENOMEM; |
| goto dma_fail; |
| } |
| } |
| |
| rc = audmgr_open(&audio->audmgr); |
| if (rc) |
| goto audmgr_fail; |
| |
| rc = msm_adsp_get("AUDPLAY0TASK", &audio->audplay, |
| &audplay_adsp_ops_evrc, audio); |
| if (rc) { |
| pr_err("audio: failed to get audplay0 dsp module\n"); |
| goto adsp_fail; |
| } |
| |
| audio->dec_id = 0; |
| |
| audio->out[0].data = audio->data + 0; |
| audio->out[0].addr = audio->phys + 0; |
| audio->out[0].size = BUFSZ; |
| |
| audio->out[1].data = audio->data + BUFSZ; |
| audio->out[1].addr = audio->phys + BUFSZ; |
| audio->out[1].size = BUFSZ; |
| |
| audio->volume = 0x3FFF; |
| |
| audevrc_flush(audio); |
| |
| audio->opened = 1; |
| file->private_data = audio; |
| |
| mutex_unlock(&audio->lock); |
| return rc; |
| |
| adsp_fail: |
| audmgr_close(&audio->audmgr); |
| audmgr_fail: |
| dma_free_coherent(NULL, DMASZ, audio->data, audio->phys); |
| dma_fail: |
| mutex_unlock(&audio->lock); |
| return rc; |
| } |
| |
| static struct file_operations audio_evrc_fops = { |
| .owner = THIS_MODULE, |
| .open = audevrc_open, |
| .release = audevrc_release, |
| .read = audevrc_read, |
| .write = audevrc_write, |
| .unlocked_ioctl = audevrc_ioctl, |
| }; |
| |
| struct miscdevice audio_evrc_misc = { |
| .minor = MISC_DYNAMIC_MINOR, |
| .name = "msm_evrc", |
| .fops = &audio_evrc_fops, |
| }; |
| |
| static int __init audevrc_init(void) |
| { |
| mutex_init(&the_evrc_audio.lock); |
| mutex_init(&the_evrc_audio.write_lock); |
| mutex_init(&the_evrc_audio.read_lock); |
| spin_lock_init(&the_evrc_audio.dsp_lock); |
| init_waitqueue_head(&the_evrc_audio.write_wait); |
| init_waitqueue_head(&the_evrc_audio.read_wait); |
| the_evrc_audio.read_data = NULL; |
| return misc_register(&audio_evrc_misc); |
| } |
| |
| static void __exit audevrc_exit(void) |
| { |
| misc_deregister(&audio_evrc_misc); |
| } |
| |
| module_init(audevrc_init); |
| module_exit(audevrc_exit); |
| |
| MODULE_DESCRIPTION("MSM EVRC driver"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_AUTHOR("QUALCOMM Inc"); |