diff options
Diffstat (limited to 'drivers/staging/dream/qdsp5/audio_out.c')
| -rw-r--r-- | drivers/staging/dream/qdsp5/audio_out.c | 841 |
1 files changed, 0 insertions, 841 deletions
diff --git a/drivers/staging/dream/qdsp5/audio_out.c b/drivers/staging/dream/qdsp5/audio_out.c deleted file mode 100644 index d20e8954156..00000000000 --- a/drivers/staging/dream/qdsp5/audio_out.c +++ /dev/null @@ -1,841 +0,0 @@ -/* arch/arm/mach-msm/qdsp5/audio_out.c - * - * pcm audio output device - * - * 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. - * - */ - -#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/wakelock.h> -#include <linux/gfp.h> - -#include <linux/msm_audio.h> - -#include <asm/atomic.h> -#include <asm/ioctls.h> -#include <mach/msm_adsp.h> - -#include "audmgr.h" - -#include <mach/qdsp5/qdsp5audppcmdi.h> -#include <mach/qdsp5/qdsp5audppmsg.h> - -#include "evlog.h" - -#define LOG_AUDIO_EVENTS 1 -#define LOG_AUDIO_FAULTS 0 - -enum { - EV_NULL, - EV_OPEN, - EV_WRITE, - EV_RETURN, - EV_IOCTL, - EV_WRITE_WAIT, - EV_WAIT_EVENT, - EV_FILL_BUFFER, - EV_SEND_BUFFER, - EV_DSP_EVENT, - EV_ENABLE, -}; - -#if (LOG_AUDIO_EVENTS != 1) -static inline void LOG(unsigned id, unsigned arg) {} -#else -static const char *pcm_log_strings[] = { - "NULL", - "OPEN", - "WRITE", - "RETURN", - "IOCTL", - "WRITE_WAIT", - "WAIT_EVENT", - "FILL_BUFFER", - "SEND_BUFFER", - "DSP_EVENT", - "ENABLE", -}; - -DECLARE_LOG(pcm_log, 64, pcm_log_strings); - -static int __init _pcm_log_init(void) -{ - return ev_log_init(&pcm_log); -} -module_init(_pcm_log_init); - -#define LOG(id,arg) ev_log_write(&pcm_log, id, arg) -#endif - - - - - -#define BUFSZ (960 * 5) -#define DMASZ (BUFSZ * 2) - -#define AUDPP_CMD_CFG_OBJ_UPDATE 0x8000 -#define AUDPP_CMD_EQ_FLAG_DIS 0x0000 -#define AUDPP_CMD_EQ_FLAG_ENA -1 -#define AUDPP_CMD_IIR_FLAG_DIS 0x0000 -#define AUDPP_CMD_IIR_FLAG_ENA -1 - -#define AUDPP_CMD_IIR_TUNING_FILTER 1 -#define AUDPP_CMD_EQUALIZER 2 -#define AUDPP_CMD_ADRC 3 - -#define ADRC_ENABLE 0x0001 -#define EQ_ENABLE 0x0002 -#define IIR_ENABLE 0x0004 - -struct adrc_filter { - uint16_t compression_th; - uint16_t compression_slope; - uint16_t rms_time; - uint16_t attack_const_lsw; - uint16_t attack_const_msw; - uint16_t release_const_lsw; - uint16_t release_const_msw; - uint16_t adrc_system_delay; -}; - -struct eqalizer { - uint16_t num_bands; - uint16_t eq_params[132]; -}; - -struct rx_iir_filter { - uint16_t num_bands; - uint16_t iir_params[48]; -}; - -typedef struct { - audpp_cmd_cfg_object_params_common common; - uint16_t eq_flag; - uint16_t num_bands; - uint16_t eq_params[132]; -} audpp_cmd_cfg_object_params_eq; - -typedef struct { - audpp_cmd_cfg_object_params_common common; - uint16_t active_flag; - uint16_t num_bands; - uint16_t iir_params[48]; -} audpp_cmd_cfg_object_params_rx_iir; - -struct buffer { - void *data; - unsigned size; - unsigned used; - 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 wait; - - /* configuration to use on next enable */ - uint32_t out_sample_rate; - uint32_t out_channel_mode; - uint32_t out_weight; - uint32_t out_buffer_size; - - struct audmgr audmgr; - - /* data allocated for various buffers */ - char *data; - dma_addr_t phys; - - int opened; - int enabled; - int running; - int stopped; /* set when stopped, cleared on flush */ - unsigned volume; - - int adrc_enable; - struct adrc_filter adrc; - - int eq_enable; - struct eqalizer eq; - - int rx_iir_enable; - struct rx_iir_filter iir; -}; - -static void audio_prevent_sleep(struct audio *audio) -{ - printk(KERN_INFO "++++++++++++++++++++++++++++++\n"); -} - -static void audio_allow_sleep(struct audio *audio) -{ - printk(KERN_INFO "------------------------------\n"); -} - -static int audio_dsp_out_enable(struct audio *audio, int yes); -static int audio_dsp_send_buffer(struct audio *audio, unsigned id, unsigned len); -static int audio_dsp_set_adrc(struct audio *audio); -static int audio_dsp_set_eq(struct audio *audio); -static int audio_dsp_set_rx_iir(struct audio *audio); - -static void audio_dsp_event(void *private, unsigned id, uint16_t *msg); - -/* must be called with audio->lock held */ -static int audio_enable(struct audio *audio) -{ - struct audmgr_config cfg; - int rc; - - pr_info("audio_enable()\n"); - - if (audio->enabled) - return 0; - - /* refuse to start if we're not ready */ - if (!audio->out[0].used || !audio->out[1].used) - return -EIO; - - /* we start buffers 0 and 1, so buffer 0 will be the - * next one the dsp will want - */ - 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_HOST_PCM; - cfg.codec = RPC_AUD_DEF_CODEC_PCM; - cfg.snd_method = RPC_SND_METHOD_MIDI; - - audio_prevent_sleep(audio); - rc = audmgr_enable(&audio->audmgr, &cfg); - if (rc < 0) { - audio_allow_sleep(audio); - return rc; - } - - if (audpp_enable(-1, audio_dsp_event, audio)) { - pr_err("audio: audpp_enable() failed\n"); - audmgr_disable(&audio->audmgr); - audio_allow_sleep(audio); - return -ENODEV; - } - - audio->enabled = 1; - return 0; -} - -/* must be called with audio->lock held */ -static int audio_disable(struct audio *audio) -{ - pr_info("audio_disable()\n"); - if (audio->enabled) { - audio->enabled = 0; - audio_dsp_out_enable(audio, 0); - - audpp_disable(-1, audio); - - wake_up(&audio->wait); - audmgr_disable(&audio->audmgr); - audio->out_needed = 0; - audio_allow_sleep(audio); - } - return 0; -} - -/* ------------------- dsp --------------------- */ -static void audio_dsp_event(void *private, unsigned id, uint16_t *msg) -{ - struct audio *audio = private; - struct buffer *frame; - unsigned long flags; - - LOG(EV_DSP_EVENT, id); - switch (id) { - case AUDPP_MSG_HOST_PCM_INTF_MSG: { - unsigned id = msg[2]; - unsigned idx = msg[3] - 1; - - /* pr_info("audio_dsp_event: HOST_PCM id %d idx %d\n", id, idx); */ - if (id != AUDPP_MSG_HOSTPCM_ID_ARM_RX) { - pr_err("bogus id\n"); - break; - } - if (idx > 1) { - pr_err("bogus buffer idx\n"); - break; - } - - spin_lock_irqsave(&audio->dsp_lock, flags); - if (audio->running) { - atomic_add(audio->out[idx].used, &audio->out_bytes); - audio->out[idx].used = 0; - - frame = audio->out + audio->out_tail; - if (frame->used) { - audio_dsp_send_buffer( - audio, audio->out_tail, frame->used); - audio->out_tail ^= 1; - } else { - audio->out_needed++; - } - wake_up(&audio->wait); - } - spin_unlock_irqrestore(&audio->dsp_lock, flags); - break; - } - case AUDPP_MSG_PCMDMAMISSED: - pr_info("audio_dsp_event: PCMDMAMISSED %d\n", msg[0]); - break; - case AUDPP_MSG_CFG_MSG: - if (msg[0] == AUDPP_MSG_ENA_ENA) { - LOG(EV_ENABLE, 1); - pr_info("audio_dsp_event: CFG_MSG ENABLE\n"); - audio->out_needed = 0; - audio->running = 1; - audpp_set_volume_and_pan(5, audio->volume, 0); - audio_dsp_set_adrc(audio); - audio_dsp_set_eq(audio); - audio_dsp_set_rx_iir(audio); - audio_dsp_out_enable(audio, 1); - } else if (msg[0] == AUDPP_MSG_ENA_DIS) { - LOG(EV_ENABLE, 0); - pr_info("audio_dsp_event: CFG_MSG DISABLE\n"); - audio->running = 0; - } else { - pr_err("audio_dsp_event: CFG_MSG %d?\n", msg[0]); - } - break; - default: - pr_err("audio_dsp_event: UNKNOWN (%d)\n", id); - } -} - -static int audio_dsp_out_enable(struct audio *audio, int yes) -{ - audpp_cmd_pcm_intf cmd; - - memset(&cmd, 0, sizeof(cmd)); - cmd.cmd_id = AUDPP_CMD_PCM_INTF_2; - cmd.object_num = AUDPP_CMD_PCM_INTF_OBJECT_NUM; - cmd.config = AUDPP_CMD_PCM_INTF_CONFIG_CMD_V; - cmd.intf_type = AUDPP_CMD_PCM_INTF_RX_ENA_ARMTODSP_V; - - if (yes) { - cmd.write_buf1LSW = audio->out[0].addr; - cmd.write_buf1MSW = audio->out[0].addr >> 16; - cmd.write_buf1_len = audio->out[0].size; - cmd.write_buf2LSW = audio->out[1].addr; - cmd.write_buf2MSW = audio->out[1].addr >> 16; - cmd.write_buf2_len = audio->out[1].size; - cmd.arm_to_rx_flag = AUDPP_CMD_PCM_INTF_ENA_V; - cmd.weight_decoder_to_rx = audio->out_weight; - cmd.weight_arm_to_rx = 1; - cmd.partition_number_arm_to_dsp = 0; - cmd.sample_rate = audio->out_sample_rate; - cmd.channel_mode = audio->out_channel_mode; - } - - return audpp_send_queue2(&cmd, sizeof(cmd)); -} - -static int audio_dsp_send_buffer(struct audio *audio, unsigned idx, unsigned len) -{ - audpp_cmd_pcm_intf_send_buffer cmd; - - cmd.cmd_id = AUDPP_CMD_PCM_INTF_2; - cmd.host_pcm_object = AUDPP_CMD_PCM_INTF_OBJECT_NUM; - cmd.config = AUDPP_CMD_PCM_INTF_BUFFER_CMD_V; - cmd.intf_type = AUDPP_CMD_PCM_INTF_RX_ENA_ARMTODSP_V; - cmd.dsp_to_arm_buf_id = 0; - cmd.arm_to_dsp_buf_id = idx + 1; - cmd.arm_to_dsp_buf_len = len; - - LOG(EV_SEND_BUFFER, idx); - return audpp_send_queue2(&cmd, sizeof(cmd)); -} - -static int audio_dsp_set_adrc(struct audio *audio) -{ - audpp_cmd_cfg_object_params_adrc cmd; - - memset(&cmd, 0, sizeof(cmd)); - cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE; - cmd.common.command_type = AUDPP_CMD_ADRC; - - if (audio->adrc_enable) { - cmd.adrc_flag = AUDPP_CMD_ADRC_FLAG_ENA; - cmd.compression_th = audio->adrc.compression_th; - cmd.compression_slope = audio->adrc.compression_slope; - cmd.rms_time = audio->adrc.rms_time; - cmd.attack_const_lsw = audio->adrc.attack_const_lsw; - cmd.attack_const_msw = audio->adrc.attack_const_msw; - cmd.release_const_lsw = audio->adrc.release_const_lsw; - cmd.release_const_msw = audio->adrc.release_const_msw; - cmd.adrc_system_delay = audio->adrc.adrc_system_delay; - } else { - cmd.adrc_flag = AUDPP_CMD_ADRC_FLAG_DIS; - } - return audpp_send_queue3(&cmd, sizeof(cmd)); -} - -static int audio_dsp_set_eq(struct audio *audio) -{ - audpp_cmd_cfg_object_params_eq cmd; - - memset(&cmd, 0, sizeof(cmd)); - cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE; - cmd.common.command_type = AUDPP_CMD_EQUALIZER; - - if (audio->eq_enable) { - cmd.eq_flag = AUDPP_CMD_EQ_FLAG_ENA; - cmd.num_bands = audio->eq.num_bands; - memcpy(&cmd.eq_params, audio->eq.eq_params, - sizeof(audio->eq.eq_params)); - } else { - cmd.eq_flag = AUDPP_CMD_EQ_FLAG_DIS; - } - return audpp_send_queue3(&cmd, sizeof(cmd)); -} - -static int audio_dsp_set_rx_iir(struct audio *audio) -{ - audpp_cmd_cfg_object_params_rx_iir cmd; - - memset(&cmd, 0, sizeof(cmd)); - cmd.common.comman_cfg = AUDPP_CMD_CFG_OBJ_UPDATE; - cmd.common.command_type = AUDPP_CMD_IIR_TUNING_FILTER; - - if (audio->rx_iir_enable) { - cmd.active_flag = AUDPP_CMD_IIR_FLAG_ENA; - cmd.num_bands = audio->iir.num_bands; - memcpy(&cmd.iir_params, audio->iir.iir_params, - sizeof(audio->iir.iir_params)); - } else { - cmd.active_flag = AUDPP_CMD_IIR_FLAG_DIS; - } - - return audpp_send_queue3(&cmd, sizeof(cmd)); -} - -/* ------------------- device --------------------- */ - -static int audio_enable_adrc(struct audio *audio, int enable) -{ - if (audio->adrc_enable != enable) { - audio->adrc_enable = enable; - if (audio->running) - audio_dsp_set_adrc(audio); - } - return 0; -} - -static int audio_enable_eq(struct audio *audio, int enable) -{ - if (audio->eq_enable != enable) { - audio->eq_enable = enable; - if (audio->running) - audio_dsp_set_eq(audio); - } - return 0; -} - -static int audio_enable_rx_iir(struct audio *audio, int enable) -{ - if (audio->rx_iir_enable != enable) { - audio->rx_iir_enable = enable; - if (audio->running) - audio_dsp_set_rx_iir(audio); - } - return 0; -} - -static void audio_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; -} - -static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - struct audio *audio = file->private_data; - int rc; - - if (cmd == AUDIO_GET_STATS) { - struct msm_audio_stats stats; - stats.byte_count = atomic_read(&audio->out_bytes); - 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(6, arg, 0); - spin_unlock_irqrestore(&audio->dsp_lock, flags); - } - - LOG(EV_IOCTL, cmd); - mutex_lock(&audio->lock); - switch (cmd) { - case AUDIO_START: - rc = audio_enable(audio); - break; - case AUDIO_STOP: - rc = audio_disable(audio); - audio->stopped = 1; - break; - case AUDIO_FLUSH: - if (audio->stopped) { - /* Make sure we're stopped and we wake any threads - * that might be blocked holding the write_lock. - * While audio->stopped write threads will always - * exit immediately. - */ - wake_up(&audio->wait); - mutex_lock(&audio->write_lock); - audio_flush(audio); - mutex_unlock(&audio->write_lock); - } - 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; - } - audio->out_sample_rate = config.sample_rate; - audio->out_channel_mode = config.channel_count; - rc = 0; - break; - } - case AUDIO_GET_CONFIG: { - struct msm_audio_config config; - config.buffer_size = BUFSZ; - config.buffer_count = 2; - 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; - } - 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; - } - default: - rc = -EINVAL; - } - mutex_unlock(&audio->lock); - return rc; -} - -static ssize_t audio_read(struct file *file, char __user *buf, size_t count, loff_t *pos) -{ - return -EINVAL; -} - -static inline int rt_policy(int policy) -{ - if (unlikely(policy == SCHED_FIFO) || unlikely(policy == SCHED_RR)) - return 1; - return 0; -} - -static inline int task_has_rt_policy(struct task_struct *p) -{ - return rt_policy(p->policy); -} - -static ssize_t audio_write(struct file *file, const char __user *buf, - size_t count, loff_t *pos) -{ - struct sched_param s = { .sched_priority = 1 }; - struct audio *audio = file->private_data; - unsigned long flags; - const char __user *start = buf; - struct buffer *frame; - size_t xfer; - int old_prio = current->rt_priority; - int old_policy = current->policy; - int cap_nice = cap_raised(current_cap(), CAP_SYS_NICE); - int rc = 0; - - LOG(EV_WRITE, count | (audio->running << 28) | (audio->stopped << 24)); - - /* just for this write, set us real-time */ - if (!task_has_rt_policy(current)) { - struct cred *new = prepare_creds(); - cap_raise(new->cap_effective, CAP_SYS_NICE); - commit_creds(new); - sched_setscheduler(current, SCHED_RR, &s); - } - - mutex_lock(&audio->write_lock); - while (count > 0) { - frame = audio->out + audio->out_head; - - LOG(EV_WAIT_EVENT, 0); - rc = wait_event_interruptible(audio->wait, - (frame->used == 0) || (audio->stopped)); - LOG(EV_WAIT_EVENT, 1); - - 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; - - spin_lock_irqsave(&audio->dsp_lock, flags); - LOG(EV_FILL_BUFFER, audio->out_head ^ 1); - frame = audio->out + audio->out_tail; - if (frame->used && audio->out_needed) { - audio_dsp_send_buffer(audio, audio->out_tail, frame->used); - audio->out_tail ^= 1; - audio->out_needed--; - } - spin_unlock_irqrestore(&audio->dsp_lock, flags); - } - - mutex_unlock(&audio->write_lock); - - /* restore scheduling policy and priority */ - if (!rt_policy(old_policy)) { - struct sched_param v = { .sched_priority = old_prio }; - sched_setscheduler(current, old_policy, &v); - if (likely(!cap_nice)) { - struct cred *new = prepare_creds(); - cap_lower(new->cap_effective, CAP_SYS_NICE); - commit_creds(new); - sched_setscheduler(current, SCHED_RR, &s); - } - } - - LOG(EV_RETURN,(buf > start) ? (buf - start) : rc); - if (buf > start) - return buf - start; - return rc; -} - -static int audio_release(struct inode *inode, struct file *file) -{ - struct audio *audio = file->private_data; - - LOG(EV_OPEN, 0); - mutex_lock(&audio->lock); - audio_disable(audio); - audio_flush(audio); - audio->opened = 0; - mutex_unlock(&audio->lock); - return 0; -} - -static struct audio the_audio; - -static int audio_open(struct inode *inode, struct file *file) -{ - struct audio *audio = &the_audio; - int rc; - - mutex_lock(&audio->lock); - - if (audio->opened) { - pr_err("audio: busy\n"); - rc = -EBUSY; - goto done; - } - - 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 done; - } - } - - rc = audmgr_open(&audio->audmgr); - if (rc) - goto done; - - audio->out_buffer_size = BUFSZ; - audio->out_sample_rate = 44100; - audio->out_channel_mode = AUDPP_CMD_PCM_INTF_STEREO_V; - audio->out_weight = 100; - - 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 = 0x2000; - - audio_flush(audio); - - file->private_data = audio; - audio->opened = 1; - rc = 0; - LOG(EV_OPEN, 1); -done: - mutex_unlock(&audio->lock); - return rc; -} - -static long audpp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - struct audio *audio = file->private_data; - int rc = 0, enable; - uint16_t enable_mask; - - mutex_lock(&audio->lock); - switch (cmd) { - case AUDIO_ENABLE_AUDPP: - if (copy_from_user(&enable_mask, (void *) arg, sizeof(enable_mask))) - goto out_fault; - - enable = (enable_mask & ADRC_ENABLE)? 1 : 0; - audio_enable_adrc(audio, enable); - enable = (enable_mask & EQ_ENABLE)? 1 : 0; - audio_enable_eq(audio, enable); - enable = (enable_mask & IIR_ENABLE)? 1 : 0; - audio_enable_rx_iir(audio, enable); - break; - - case AUDIO_SET_ADRC: - if (copy_from_user(&audio->adrc, (void*) arg, sizeof(audio->adrc))) - goto out_fault; - break; - - case AUDIO_SET_EQ: - if (copy_from_user(&audio->eq, (void*) arg, sizeof(audio->eq))) - goto out_fault; - break; - - case AUDIO_SET_RX_IIR: - if (copy_from_user(&audio->iir, (void*) arg, sizeof(audio->iir))) - goto out_fault; - break; - - default: - rc = -EINVAL; - } - - goto out; - - out_fault: - rc = -EFAULT; - out: - mutex_unlock(&audio->lock); - return rc; -} - -static int audpp_open(struct inode *inode, struct file *file) -{ - struct audio *audio = &the_audio; - - file->private_data = audio; - return 0; -} - -static struct file_operations audio_fops = { - .owner = THIS_MODULE, - .open = audio_open, - .release = audio_release, - .read = audio_read, - .write = audio_write, - .unlocked_ioctl = audio_ioctl, - .llseek = noop_llseek, -}; - -static struct file_operations audpp_fops = { - .owner = THIS_MODULE, - .open = audpp_open, - .unlocked_ioctl = audpp_ioctl, - .llseek = noop_llseek, -}; - -struct miscdevice audio_misc = { - .minor = MISC_DYNAMIC_MINOR, - .name = "msm_pcm_out", - .fops = &audio_fops, -}; - -struct miscdevice audpp_misc = { - .minor = MISC_DYNAMIC_MINOR, - .name = "msm_pcm_ctl", - .fops = &audpp_fops, -}; - -static int __init audio_init(void) -{ - mutex_init(&the_audio.lock); - mutex_init(&the_audio.write_lock); - spin_lock_init(&the_audio.dsp_lock); - init_waitqueue_head(&the_audio.wait); - return (misc_register(&audio_misc) || misc_register(&audpp_misc)); -} - -device_initcall(audio_init); |