diff options
Diffstat (limited to 'sound/soc/soc-core.c')
| -rw-r--r-- | sound/soc/soc-core.c | 3955 |
1 files changed, 3955 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c new file mode 100644 index 00000000..7e286549 --- /dev/null +++ b/sound/soc/soc-core.c @@ -0,0 +1,3955 @@ +/* + * soc-core.c -- ALSA SoC Audio Layer + * + * Copyright 2005 Wolfson Microelectronics PLC. + * Copyright 2005 Openedhand Ltd. + * Copyright (C) 2010 Slimlogic Ltd. + * Copyright (C) 2010 Texas Instruments Inc. + * + * Author: Liam Girdwood <lrg@slimlogic.co.uk> + * with code, comments and ideas from :- + * Richard Purdie <richard@openedhand.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * TODO: + * o Add hw rules to enforce rates, etc. + * o More testing with other codecs/machines. + * o Add more codecs and platforms to ensure good API coverage. + * o Support TDM on PCM and I2S + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/bitops.h> +#include <linux/debugfs.h> +#include <linux/platform_device.h> +#include <linux/ctype.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <sound/ac97_codec.h> +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/initval.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/asoc.h> + +#define NAME_SIZE 32 + +static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq); + +#ifdef CONFIG_DEBUG_FS +struct dentry *snd_soc_debugfs_root; +EXPORT_SYMBOL_GPL(snd_soc_debugfs_root); +#endif + +static DEFINE_MUTEX(client_mutex); +static LIST_HEAD(card_list); +static LIST_HEAD(dai_list); +static LIST_HEAD(platform_list); +static LIST_HEAD(codec_list); + +/* + * This is a timeout to do a DAPM powerdown after a stream is closed(). + * It can be used to eliminate pops between different playback streams, e.g. + * between two audio tracks. + */ +static int pmdown_time = 5000; +module_param(pmdown_time, int, 0); +MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)"); + +/* returns the minimum number of bytes needed to represent + * a particular given value */ +static int min_bytes_needed(unsigned long val) +{ + int c = 0; + int i; + + for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c) + if (val & (1UL << i)) + break; + c = (sizeof val * 8) - c; + if (!c || (c % 8)) + c = (c + 8) / 8; + else + c /= 8; + return c; +} + +/* fill buf which is 'len' bytes with a formatted + * string of the form 'reg: value\n' */ +static int format_register_str(struct snd_soc_codec *codec, + unsigned int reg, char *buf, size_t len) +{ + int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; + int regsize = codec->driver->reg_word_size * 2; + int ret; + char tmpbuf[len + 1]; + char regbuf[regsize + 1]; + + /* since tmpbuf is allocated on the stack, warn the callers if they + * try to abuse this function */ + WARN_ON(len > 63); + + /* +2 for ': ' and + 1 for '\n' */ + if (wordsize + regsize + 2 + 1 != len) + return -EINVAL; + + ret = snd_soc_read(codec, reg); + if (ret < 0) { + memset(regbuf, 'X', regsize); + regbuf[regsize] = '\0'; + } else { + snprintf(regbuf, regsize + 1, "%.*x", regsize, ret); + } + + /* prepare the buffer */ + snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf); + /* copy it back to the caller without the '\0' */ + memcpy(buf, tmpbuf, len); + + return 0; +} + +/* codec register dump */ +static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf, + size_t count, loff_t pos) +{ + int i, step = 1; + int wordsize, regsize; + int len; + size_t total = 0; + loff_t p = 0; + + wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; + regsize = codec->driver->reg_word_size * 2; + + len = wordsize + regsize + 2 + 1; + + if (!codec->driver->reg_cache_size) + return 0; + + if (codec->driver->reg_cache_step) + step = codec->driver->reg_cache_step; + + for (i = 0; i < codec->driver->reg_cache_size; i += step) { + if (!snd_soc_codec_readable_register(codec, i)) + continue; + if (codec->driver->display_register) { + count += codec->driver->display_register(codec, buf + count, + PAGE_SIZE - count, i); + } else { + /* only support larger than PAGE_SIZE bytes debugfs + * entries for the default case */ + if (p >= pos) { + if (total + len >= count - 1) + break; + format_register_str(codec, i, buf + total, len); + total += len; + } + p += len; + } + } + + total = min(total, count - 1); + + return total; +} + +static ssize_t codec_reg_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); + + return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0); +} + +static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); + +static ssize_t pmdown_time_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); + + return sprintf(buf, "%ld\n", rtd->pmdown_time); +} + +static ssize_t pmdown_time_set(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); + int ret; + + ret = strict_strtol(buf, 10, &rtd->pmdown_time); + if (ret) + return ret; + + return count; +} + +static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set); + +#ifdef CONFIG_DEBUG_FS +static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + ssize_t ret; + struct snd_soc_codec *codec = file->private_data; + char *buf; + + if (*ppos < 0 || !count) + return -EINVAL; + + buf = kmalloc(count, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = soc_codec_reg_show(codec, buf, count, *ppos); + if (ret >= 0) { + if (copy_to_user(user_buf, buf, ret)) { + kfree(buf); + return -EFAULT; + } + *ppos += ret; + } + + kfree(buf); + return ret; +} + +static ssize_t codec_reg_write_file(struct file *file, + const char __user *user_buf, size_t count, loff_t *ppos) +{ + char buf[32]; + size_t buf_size; + char *start = buf; + unsigned long reg, value; + struct snd_soc_codec *codec = file->private_data; + + buf_size = min(count, (sizeof(buf)-1)); + if (copy_from_user(buf, user_buf, buf_size)) + return -EFAULT; + buf[buf_size] = 0; + + while (*start == ' ') + start++; + reg = simple_strtoul(start, &start, 16); + while (*start == ' ') + start++; + if (strict_strtoul(start, 16, &value)) + return -EINVAL; + + /* Userspace has been fiddling around behind the kernel's back */ + add_taint(TAINT_USER); + + snd_soc_write(codec, reg, value); + return buf_size; +} + +static const struct file_operations codec_reg_fops = { + .open = simple_open, + .read = codec_reg_read_file, + .write = codec_reg_write_file, + .llseek = default_llseek, +}; + +static void soc_init_codec_debugfs(struct snd_soc_codec *codec) +{ + struct dentry *debugfs_card_root = codec->card->debugfs_card_root; + + codec->debugfs_codec_root = debugfs_create_dir(codec->name, + debugfs_card_root); + if (!codec->debugfs_codec_root) { + dev_warn(codec->dev, "Failed to create codec debugfs directory\n"); + return; + } + + debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root, + &codec->cache_sync); + debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root, + &codec->cache_only); + + codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, + codec->debugfs_codec_root, + codec, &codec_reg_fops); + if (!codec->debugfs_reg) + dev_warn(codec->dev, "Failed to create codec register debugfs file\n"); + + snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root); +} + +static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) +{ + debugfs_remove_recursive(codec->debugfs_codec_root); +} + +static void soc_init_platform_debugfs(struct snd_soc_platform *platform) +{ + struct dentry *debugfs_card_root = platform->card->debugfs_card_root; + + platform->debugfs_platform_root = debugfs_create_dir(platform->name, + debugfs_card_root); + if (!platform->debugfs_platform_root) { + dev_warn(platform->dev, + "Failed to create platform debugfs directory\n"); + return; + } + + snd_soc_dapm_debugfs_init(&platform->dapm, + platform->debugfs_platform_root); +} + +static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform) +{ + debugfs_remove_recursive(platform->debugfs_platform_root); +} + +static ssize_t codec_list_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + ssize_t len, ret = 0; + struct snd_soc_codec *codec; + + if (!buf) + return -ENOMEM; + + list_for_each_entry(codec, &codec_list, list) { + len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", + codec->name); + if (len >= 0) + ret += len; + if (ret > PAGE_SIZE) { + ret = PAGE_SIZE; + break; + } + } + + if (ret >= 0) + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + + kfree(buf); + + return ret; +} + +static const struct file_operations codec_list_fops = { + .read = codec_list_read_file, + .llseek = default_llseek,/* read accesses f_pos */ +}; + +static ssize_t dai_list_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + ssize_t len, ret = 0; + struct snd_soc_dai *dai; + + if (!buf) + return -ENOMEM; + + list_for_each_entry(dai, &dai_list, list) { + len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name); + if (len >= 0) + ret += len; + if (ret > PAGE_SIZE) { + ret = PAGE_SIZE; + break; + } + } + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + + kfree(buf); + + return ret; +} + +static const struct file_operations dai_list_fops = { + .read = dai_list_read_file, + .llseek = default_llseek,/* read accesses f_pos */ +}; + +static ssize_t platform_list_read_file(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + ssize_t len, ret = 0; + struct snd_soc_platform *platform; + + if (!buf) + return -ENOMEM; + + list_for_each_entry(platform, &platform_list, list) { + len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", + platform->name); + if (len >= 0) + ret += len; + if (ret > PAGE_SIZE) { + ret = PAGE_SIZE; + break; + } + } + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + + kfree(buf); + + return ret; +} + +static const struct file_operations platform_list_fops = { + .read = platform_list_read_file, + .llseek = default_llseek,/* read accesses f_pos */ +}; + +static void soc_init_card_debugfs(struct snd_soc_card *card) +{ + card->debugfs_card_root = debugfs_create_dir(card->name, + snd_soc_debugfs_root); + if (!card->debugfs_card_root) { + dev_warn(card->dev, + "ASoC: Failed to create card debugfs directory\n"); + return; + } + + card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, + card->debugfs_card_root, + &card->pop_time); + if (!card->debugfs_pop_time) + dev_warn(card->dev, + "Failed to create pop time debugfs file\n"); +} + +static void soc_cleanup_card_debugfs(struct snd_soc_card *card) +{ + debugfs_remove_recursive(card->debugfs_card_root); +} + +#else + +static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec) +{ +} + +static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) +{ +} + +static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform) +{ +} + +static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform) +{ +} + +static inline void soc_init_card_debugfs(struct snd_soc_card *card) +{ +} + +static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) +{ +} +#endif + +#ifdef CONFIG_SND_SOC_AC97_BUS +/* unregister ac97 codec */ +static int soc_ac97_dev_unregister(struct snd_soc_codec *codec) +{ + if (codec->ac97->dev.bus) + device_unregister(&codec->ac97->dev); + return 0; +} + +/* stop no dev release warning */ +static void soc_ac97_device_release(struct device *dev){} + +/* register ac97 codec to bus */ +static int soc_ac97_dev_register(struct snd_soc_codec *codec) +{ + int err; + + codec->ac97->dev.bus = &ac97_bus_type; + codec->ac97->dev.parent = codec->card->dev; + codec->ac97->dev.release = soc_ac97_device_release; + + dev_set_name(&codec->ac97->dev, "%d-%d:%s", + codec->card->snd_card->number, 0, codec->name); + err = device_register(&codec->ac97->dev); + if (err < 0) { + snd_printk(KERN_ERR "Can't register ac97 bus\n"); + codec->ac97->dev.bus = NULL; + return err; + } + return 0; +} +#endif + +#ifdef CONFIG_PM_SLEEP +/* powers down audio subsystem for suspend */ +int snd_soc_suspend(struct device *dev) +{ + struct snd_soc_card *card = dev_get_drvdata(dev); + struct snd_soc_codec *codec; + int i; + + /* If the initialization of this soc device failed, there is no codec + * associated with it. Just bail out in this case. + */ + if (list_empty(&card->codec_dev_list)) + return 0; + + /* Due to the resume being scheduled into a workqueue we could + * suspend before that's finished - wait for it to complete. + */ + snd_power_lock(card->snd_card); + snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); + snd_power_unlock(card->snd_card); + + /* we're going to block userspace touching us until resume completes */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); + + /* mute any active DACs */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *dai = card->rtd[i].codec_dai; + struct snd_soc_dai_driver *drv = dai->driver; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (drv->ops->digital_mute && dai->playback_active) + drv->ops->digital_mute(dai, 1); + } + + /* suspend all pcms */ + for (i = 0; i < card->num_rtd; i++) { + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + snd_pcm_suspend_all(card->rtd[i].pcm); + } + + if (card->suspend_pre) + card->suspend_pre(card); + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + struct snd_soc_platform *platform = card->rtd[i].platform; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control) + cpu_dai->driver->suspend(cpu_dai); + if (platform->driver->suspend && !platform->suspended) { + platform->driver->suspend(cpu_dai); + platform->suspended = 1; + } + } + + /* close any waiting streams and save state */ + for (i = 0; i < card->num_rtd; i++) { + flush_delayed_work_sync(&card->rtd[i].delayed_work); + card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level; + } + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + snd_soc_dapm_stream_event(&card->rtd[i], + SNDRV_PCM_STREAM_PLAYBACK, + codec_dai, + SND_SOC_DAPM_STREAM_SUSPEND); + + snd_soc_dapm_stream_event(&card->rtd[i], + SNDRV_PCM_STREAM_CAPTURE, + codec_dai, + SND_SOC_DAPM_STREAM_SUSPEND); + } + + /* suspend all CODECs */ + list_for_each_entry(codec, &card->codec_dev_list, card_list) { + /* If there are paths active then the CODEC will be held with + * bias _ON and should not be suspended. */ + if (!codec->suspended && codec->driver->suspend) { + switch (codec->dapm.bias_level) { + case SND_SOC_BIAS_STANDBY: + /* + * If the CODEC is capable of idle + * bias off then being in STANDBY + * means it's doing something, + * otherwise fall through. + */ + if (codec->dapm.idle_bias_off) { + dev_dbg(codec->dev, + "idle_bias_off CODEC on over suspend\n"); + break; + } + case SND_SOC_BIAS_OFF: + codec->driver->suspend(codec); + codec->suspended = 1; + codec->cache_sync = 1; + break; + default: + dev_dbg(codec->dev, "CODEC is on over suspend\n"); + break; + } + } + } + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control) + cpu_dai->driver->suspend(cpu_dai); + } + + if (card->suspend_post) + card->suspend_post(card); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_suspend); + +/* deferred resume work, so resume can complete before we finished + * setting our codec back up, which can be very slow on I2C + */ +static void soc_resume_deferred(struct work_struct *work) +{ + struct snd_soc_card *card = + container_of(work, struct snd_soc_card, deferred_resume_work); + struct snd_soc_codec *codec; + int i; + + int dbg_resume = 0; + /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, + * so userspace apps are blocked from touching us + */ + + dev_dbg(card->dev, "starting resume work\n"); + + /* Bring us up into D2 so that DAPM starts enabling things */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2); + + if (card->resume_pre) + card->resume_pre(card); + + /* resume AC97 DAIs */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control) + cpu_dai->driver->resume(cpu_dai); + } + + list_for_each_entry(codec, &card->codec_dev_list, card_list) { + /* If the CODEC was idle over suspend then it will have been + * left with bias OFF or STANDBY and suspended so we must now + * resume. Otherwise the suspend was suppressed. + */ + if (codec->driver->resume && codec->suspended) { + switch (codec->dapm.bias_level) { + case SND_SOC_BIAS_STANDBY: + case SND_SOC_BIAS_OFF: + codec->driver->resume(codec); + codec->suspended = 0; + dbg_resume = 1; + break; + default: + + dev_dbg(codec->dev, "CODEC was on over suspend\n"); + break; + } + } + #if 1 + if (!dbg_resume && codec->driver->resume) //add for temp std 2014-3-24 + { + dbg_resume = 1; + codec->driver->resume(codec); + codec->suspended = 0; + + } + #endif + } + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + snd_soc_dapm_stream_event(&card->rtd[i], + SNDRV_PCM_STREAM_PLAYBACK, codec_dai, + SND_SOC_DAPM_STREAM_RESUME); + + snd_soc_dapm_stream_event(&card->rtd[i], + SNDRV_PCM_STREAM_CAPTURE, codec_dai, + SND_SOC_DAPM_STREAM_RESUME); + } + + /* unmute any active DACs */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *dai = card->rtd[i].codec_dai; + struct snd_soc_dai_driver *drv = dai->driver; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (drv->ops->digital_mute && dai->playback_active) + drv->ops->digital_mute(dai, 0); + } + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + struct snd_soc_platform *platform = card->rtd[i].platform; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control) + cpu_dai->driver->resume(cpu_dai); + if (platform->driver->resume && platform->suspended) { + platform->driver->resume(cpu_dai); + platform->suspended = 0; + } + } + + if (card->resume_post) + card->resume_post(card); + + dev_dbg(card->dev, "resume work completed\n"); + + /* userspace can access us now we are back as we were before */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0); +} + +/* powers up audio subsystem after a suspend */ +int snd_soc_resume(struct device *dev) +{ + struct snd_soc_card *card = dev_get_drvdata(dev); + int i, ac97_control = 0; + + /* If the initialization of this soc device failed, there is no codec + * associated with it. Just bail out in this case. + */ + if (list_empty(&card->codec_dev_list)) + return 0; + + /* AC97 devices might have other drivers hanging off them so + * need to resume immediately. Other drivers don't have that + * problem and may take a substantial amount of time to resume + * due to I/O costs and anti-pop so handle them out of line. + */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + ac97_control |= cpu_dai->driver->ac97_control; + } + if (ac97_control) { + dev_dbg(dev, "Resuming AC97 immediately\n"); + soc_resume_deferred(&card->deferred_resume_work); + } else { + dev_dbg(dev, "Scheduling resume work\n"); + if (!schedule_work(&card->deferred_resume_work)) + dev_err(dev, "resume work item may be lost\n"); + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_resume); +#else +#define snd_soc_suspend NULL +#define snd_soc_resume NULL +#endif + +static const struct snd_soc_dai_ops null_dai_ops = { +}; + +static int soc_bind_dai_link(struct snd_soc_card *card, int num) +{ + struct snd_soc_dai_link *dai_link = &card->dai_link[num]; + struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; + struct snd_soc_codec *codec; + struct snd_soc_platform *platform; + struct snd_soc_dai *codec_dai, *cpu_dai; + const char *platform_name; + + if (rtd->complete) + return 1; + dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num); + + /* do we already have the CPU DAI for this link ? */ + if (rtd->cpu_dai) { + goto find_codec; + } + /* no, then find CPU DAI from registered DAIs*/ + list_for_each_entry(cpu_dai, &dai_list, list) { + if (dai_link->cpu_dai_of_node) { + if (cpu_dai->dev->of_node != dai_link->cpu_dai_of_node) + continue; + } else { + if (strcmp(cpu_dai->name, dai_link->cpu_dai_name)) + continue; + } + + rtd->cpu_dai = cpu_dai; + goto find_codec; + } + dev_dbg(card->dev, "CPU DAI %s not registered\n", + dai_link->cpu_dai_name); + +find_codec: + /* do we already have the CODEC for this link ? */ + if (rtd->codec) { + goto find_platform; + } + + /* no, then find CODEC from registered CODECs*/ + list_for_each_entry(codec, &codec_list, list) { + if (dai_link->codec_of_node) { + if (codec->dev->of_node != dai_link->codec_of_node) + continue; + } else { + if (strcmp(codec->name, dai_link->codec_name)) + continue; + } + + rtd->codec = codec; + + /* + * CODEC found, so find CODEC DAI from registered DAIs from + * this CODEC + */ + list_for_each_entry(codec_dai, &dai_list, list) { + if (codec->dev == codec_dai->dev && + !strcmp(codec_dai->name, + dai_link->codec_dai_name)) { + + rtd->codec_dai = codec_dai; + goto find_platform; + } + } + dev_dbg(card->dev, "CODEC DAI %s not registered\n", + dai_link->codec_dai_name); + + goto find_platform; + } + dev_dbg(card->dev, "CODEC %s not registered\n", + dai_link->codec_name); + +find_platform: + /* do we need a platform? */ + if (rtd->platform) + goto out; + + /* if there's no platform we match on the empty platform */ + platform_name = dai_link->platform_name; + if (!platform_name && !dai_link->platform_of_node) + platform_name = "snd-soc-dummy"; + + /* no, then find one from the set of registered platforms */ + list_for_each_entry(platform, &platform_list, list) { + if (dai_link->platform_of_node) { + if (platform->dev->of_node != + dai_link->platform_of_node) + continue; + } else { + if (strcmp(platform->name, platform_name)) + continue; + } + + rtd->platform = platform; + goto out; + } + + dev_dbg(card->dev, "platform %s not registered\n", + dai_link->platform_name); + return 0; + +out: + /* mark rtd as complete if we found all 4 of our client devices */ + if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) { + rtd->complete = 1; + card->num_rtd++; + } + return 1; +} + +static void soc_remove_codec(struct snd_soc_codec *codec) +{ + int err; + + if (codec->driver->remove) { + err = codec->driver->remove(codec); + if (err < 0) + dev_err(codec->dev, + "asoc: failed to remove %s: %d\n", + codec->name, err); + } + + /* Make sure all DAPM widgets are freed */ + snd_soc_dapm_free(&codec->dapm); + + soc_cleanup_codec_debugfs(codec); + codec->probed = 0; + list_del(&codec->card_list); + module_put(codec->dev->driver->owner); +} + +static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order) +{ + struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; + struct snd_soc_codec *codec = rtd->codec; + struct snd_soc_platform *platform = rtd->platform; + struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai; + int err; + + /* unregister the rtd device */ + if (rtd->dev_registered) { + device_remove_file(rtd->dev, &dev_attr_pmdown_time); + device_remove_file(rtd->dev, &dev_attr_codec_reg); + device_unregister(rtd->dev); + rtd->dev_registered = 0; + } + + /* remove the CODEC DAI */ + if (codec_dai && codec_dai->probed && + codec_dai->driver->remove_order == order) { + if (codec_dai->driver->remove) { + err = codec_dai->driver->remove(codec_dai); + if (err < 0) + pr_err("asoc: failed to remove %s: %d\n", + codec_dai->name, err); + } + codec_dai->probed = 0; + list_del(&codec_dai->card_list); + } + + /* remove the platform */ + if (platform && platform->probed && + platform->driver->remove_order == order) { + if (platform->driver->remove) { + err = platform->driver->remove(platform); + if (err < 0) + pr_err("asoc: failed to remove %s: %d\n", + platform->name, err); + } + + /* Make sure all DAPM widgets are freed */ + snd_soc_dapm_free(&platform->dapm); + + soc_cleanup_platform_debugfs(platform); + platform->probed = 0; + list_del(&platform->card_list); + module_put(platform->dev->driver->owner); + } + + /* remove the CODEC */ + if (codec && codec->probed && + codec->driver->remove_order == order) + soc_remove_codec(codec); + + /* remove the cpu_dai */ + if (cpu_dai && cpu_dai->probed && + cpu_dai->driver->remove_order == order) { + if (cpu_dai->driver->remove) { + err = cpu_dai->driver->remove(cpu_dai); + if (err < 0) + pr_err("asoc: failed to remove %s: %d\n", + cpu_dai->name, err); + } + cpu_dai->probed = 0; + list_del(&cpu_dai->card_list); + module_put(cpu_dai->dev->driver->owner); + } +} + +static void soc_remove_dai_links(struct snd_soc_card *card) +{ + int dai, order; + + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + for (dai = 0; dai < card->num_rtd; dai++) + soc_remove_dai_link(card, dai, order); + } + card->num_rtd = 0; +} + +static void soc_set_name_prefix(struct snd_soc_card *card, + struct snd_soc_codec *codec) +{ + int i; + + if (card->codec_conf == NULL) + return; + + for (i = 0; i < card->num_configs; i++) { + struct snd_soc_codec_conf *map = &card->codec_conf[i]; + if (map->dev_name && !strcmp(codec->name, map->dev_name)) { + codec->name_prefix = map->name_prefix; + break; + } + } +} + +static int soc_probe_codec(struct snd_soc_card *card, + struct snd_soc_codec *codec) +{ + int ret = 0; + const struct snd_soc_codec_driver *driver = codec->driver; + struct snd_soc_dai *dai; + + codec->card = card; + codec->dapm.card = card; + soc_set_name_prefix(card, codec); + + if (!try_module_get(codec->dev->driver->owner)) + return -ENODEV; + + soc_init_codec_debugfs(codec); + + if (driver->dapm_widgets) + snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets, + driver->num_dapm_widgets); + + /* Create DAPM widgets for each DAI stream */ + list_for_each_entry(dai, &dai_list, list) { + if (dai->dev != codec->dev) + continue; + + snd_soc_dapm_new_dai_widgets(&codec->dapm, dai); + } + + codec->dapm.idle_bias_off = driver->idle_bias_off; + + if (driver->probe) { + ret = driver->probe(codec); + if (ret < 0) { + dev_err(codec->dev, + "asoc: failed to probe CODEC %s: %d\n", + codec->name, ret); + goto err_probe; + } + } + + if (driver->controls) + snd_soc_add_codec_controls(codec, driver->controls, + driver->num_controls); + if (driver->dapm_routes) + snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes, + driver->num_dapm_routes); + + /* mark codec as probed and add to card codec list */ + codec->probed = 1; + list_add(&codec->card_list, &card->codec_dev_list); + list_add(&codec->dapm.list, &card->dapm_list); + + return 0; + +err_probe: + soc_cleanup_codec_debugfs(codec); + module_put(codec->dev->driver->owner); + + return ret; +} + +static int soc_probe_platform(struct snd_soc_card *card, + struct snd_soc_platform *platform) +{ + int ret = 0; + const struct snd_soc_platform_driver *driver = platform->driver; + + platform->card = card; + platform->dapm.card = card; + + if (!try_module_get(platform->dev->driver->owner)) + return -ENODEV; + + soc_init_platform_debugfs(platform); + + if (driver->dapm_widgets) + snd_soc_dapm_new_controls(&platform->dapm, + driver->dapm_widgets, driver->num_dapm_widgets); + + platform->dapm.idle_bias_off = 1; + + if (driver->probe) { + ret = driver->probe(platform); + if (ret < 0) { + dev_err(platform->dev, + "asoc: failed to probe platform %s: %d\n", + platform->name, ret); + goto err_probe; + } + } + + if (driver->controls) + snd_soc_add_platform_controls(platform, driver->controls, + driver->num_controls); + if (driver->dapm_routes) + snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes, + driver->num_dapm_routes); + + /* mark platform as probed and add to card platform list */ + platform->probed = 1; + list_add(&platform->card_list, &card->platform_dev_list); + list_add(&platform->dapm.list, &card->dapm_list); + + return 0; + +err_probe: + soc_cleanup_platform_debugfs(platform); + module_put(platform->dev->driver->owner); + + return ret; +} + +static void rtd_release(struct device *dev) +{ + kfree(dev); +} + +static int soc_post_component_init(struct snd_soc_card *card, + struct snd_soc_codec *codec, + int num, int dailess) +{ + struct snd_soc_dai_link *dai_link = NULL; + struct snd_soc_aux_dev *aux_dev = NULL; + struct snd_soc_pcm_runtime *rtd; + const char *temp, *name; + int ret = 0; + + if (!dailess) { + dai_link = &card->dai_link[num]; + rtd = &card->rtd[num]; + name = dai_link->name; + } else { + aux_dev = &card->aux_dev[num]; + rtd = &card->rtd_aux[num]; + name = aux_dev->name; + } + rtd->card = card; + + /* Make sure all DAPM widgets are instantiated */ + snd_soc_dapm_new_widgets(&codec->dapm); + + /* machine controls, routes and widgets are not prefixed */ + temp = codec->name_prefix; + codec->name_prefix = NULL; + + /* do machine specific initialization */ + if (!dailess && dai_link->init) + ret = dai_link->init(rtd); + else if (dailess && aux_dev->init) + ret = aux_dev->init(&codec->dapm); + if (ret < 0) { + dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret); + return ret; + } + codec->name_prefix = temp; + + /* register the rtd device */ + rtd->codec = codec; + + rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL); + if (!rtd->dev) + return -ENOMEM; + device_initialize(rtd->dev); + rtd->dev->parent = card->dev; + rtd->dev->release = rtd_release; + rtd->dev->init_name = name; + dev_set_drvdata(rtd->dev, rtd); + mutex_init(&rtd->pcm_mutex); + ret = device_add(rtd->dev); + if (ret < 0) { + dev_err(card->dev, + "asoc: failed to register runtime device: %d\n", ret); + return ret; + } + rtd->dev_registered = 1; + + /* add DAPM sysfs entries for this codec */ + ret = snd_soc_dapm_sys_add(rtd->dev); + if (ret < 0) + dev_err(codec->dev, + "asoc: failed to add codec dapm sysfs entries: %d\n", + ret); + + /* add codec sysfs entries */ + ret = device_create_file(rtd->dev, &dev_attr_codec_reg); + if (ret < 0) + dev_err(codec->dev, + "asoc: failed to add codec sysfs files: %d\n", ret); + + return 0; +} + +static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order) +{ + struct snd_soc_dai_link *dai_link = &card->dai_link[num]; + struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; + struct snd_soc_codec *codec = rtd->codec; + struct snd_soc_platform *platform = rtd->platform; + struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai; + int ret; + + dev_dbg(card->dev, "probe %s dai link %d late %d\n", + card->name, num, order); + + /* config components */ + codec_dai->codec = codec; + cpu_dai->platform = platform; + codec_dai->card = card; + cpu_dai->card = card; + + /* set default power off timeout */ + rtd->pmdown_time = pmdown_time; + + /* probe the cpu_dai */ + if (!cpu_dai->probed && + cpu_dai->driver->probe_order == order) { + if (!try_module_get(cpu_dai->dev->driver->owner)) + return -ENODEV; + + if (cpu_dai->driver->probe) { + ret = cpu_dai->driver->probe(cpu_dai); + if (ret < 0) { + pr_err("asoc: failed to probe CPU DAI %s: %d\n", + cpu_dai->name, ret); + module_put(cpu_dai->dev->driver->owner); + return ret; + } + } + cpu_dai->probed = 1; + /* mark cpu_dai as probed and add to card dai list */ + list_add(&cpu_dai->card_list, &card->dai_dev_list); + } + + /* probe the CODEC */ + if (!codec->probed && + codec->driver->probe_order == order) { + ret = soc_probe_codec(card, codec); + if (ret < 0) + return ret; + } + + /* probe the platform */ + if (!platform->probed && + platform->driver->probe_order == order) { + ret = soc_probe_platform(card, platform); + if (ret < 0) + return ret; + } + + /* probe the CODEC DAI */ + if (!codec_dai->probed && codec_dai->driver->probe_order == order) { + if (codec_dai->driver->probe) { + ret = codec_dai->driver->probe(codec_dai); + if (ret < 0) { + pr_err("asoc: failed to probe CODEC DAI %s: %d\n", + codec_dai->name, ret); + return ret; + } + } + + /* mark codec_dai as probed and add to card dai list */ + codec_dai->probed = 1; + list_add(&codec_dai->card_list, &card->dai_dev_list); + } + + /* complete DAI probe during last probe */ + if (order != SND_SOC_COMP_ORDER_LAST) + return 0; + + ret = soc_post_component_init(card, codec, num, 0); + if (ret) + return ret; + + ret = device_create_file(rtd->dev, &dev_attr_pmdown_time); + if (ret < 0) + pr_warn("asoc: failed to add pmdown_time sysfs:%d\n", ret); + + /* create the pcm */ + ret = soc_new_pcm(rtd, num); + if (ret < 0) { + pr_err("asoc: can't create pcm %s :%d\n", + dai_link->stream_name, ret); + return ret; + } + + /* add platform data for AC97 devices */ + if (rtd->codec_dai->driver->ac97_control) + snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata); + + return 0; +} + +#ifdef CONFIG_SND_SOC_AC97_BUS +static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd) +{ + int ret; + + /* Only instantiate AC97 if not already done by the adaptor + * for the generic AC97 subsystem. + */ + if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) { + /* + * It is possible that the AC97 device is already registered to + * the device subsystem. This happens when the device is created + * via snd_ac97_mixer(). Currently only SoC codec that does so + * is the generic AC97 glue but others migh emerge. + * + * In those cases we don't try to register the device again. + */ + if (!rtd->codec->ac97_created) + return 0; + + ret = soc_ac97_dev_register(rtd->codec); + if (ret < 0) { + pr_err("asoc: AC97 device register failed:%d\n", ret); + return ret; + } + + rtd->codec->ac97_registered = 1; + } + return 0; +} + +static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec) +{ + if (codec->ac97_registered) { + soc_ac97_dev_unregister(codec); + codec->ac97_registered = 0; + } +} +#endif + +static int soc_probe_aux_dev(struct snd_soc_card *card, int num) +{ + struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; + struct snd_soc_codec *codec; + int ret = -ENODEV; + + /* find CODEC from registered CODECs*/ + list_for_each_entry(codec, &codec_list, list) { + if (!strcmp(codec->name, aux_dev->codec_name)) { + if (codec->probed) { + dev_err(codec->dev, + "asoc: codec already probed"); + ret = -EBUSY; + goto out; + } + goto found; + } + } + /* codec not found */ + dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name); + goto out; + +found: + ret = soc_probe_codec(card, codec); + if (ret < 0) + return ret; + + ret = soc_post_component_init(card, codec, num, 1); + +out: + return ret; +} + +static void soc_remove_aux_dev(struct snd_soc_card *card, int num) +{ + struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; + struct snd_soc_codec *codec = rtd->codec; + + /* unregister the rtd device */ + if (rtd->dev_registered) { + device_remove_file(rtd->dev, &dev_attr_codec_reg); + device_del(rtd->dev); + rtd->dev_registered = 0; + } + + if (codec && codec->probed) + soc_remove_codec(codec); +} + +static int snd_soc_init_codec_cache(struct snd_soc_codec *codec, + enum snd_soc_compress_type compress_type) +{ + int ret; + + if (codec->cache_init) + return 0; + + /* override the compress_type if necessary */ + if (compress_type && codec->compress_type != compress_type) + codec->compress_type = compress_type; + ret = snd_soc_cache_init(codec); + if (ret < 0) { + dev_err(codec->dev, "Failed to set cache compression type: %d\n", + ret); + return ret; + } + codec->cache_init = 1; + return 0; +} + +static void snd_soc_instantiate_card(struct snd_soc_card *card) +{ + struct snd_soc_codec *codec; + struct snd_soc_codec_conf *codec_conf; + enum snd_soc_compress_type compress_type; + struct snd_soc_dai_link *dai_link; + int ret, i, order; + + mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT); + + if (card->instantiated) { + mutex_unlock(&card->mutex); + return; + } + + /* bind DAIs */ + for (i = 0; i < card->num_links; i++) + soc_bind_dai_link(card, i); + + /* bind completed ? */ + if (card->num_rtd != card->num_links) { + mutex_unlock(&card->mutex); + return; + } + + /* initialize the register cache for each available codec */ + list_for_each_entry(codec, &codec_list, list) { + if (codec->cache_init) + continue; + /* by default we don't override the compress_type */ + compress_type = 0; + /* check to see if we need to override the compress_type */ + for (i = 0; i < card->num_configs; ++i) { + codec_conf = &card->codec_conf[i]; + if (!strcmp(codec->name, codec_conf->dev_name)) { + compress_type = codec_conf->compress_type; + if (compress_type && compress_type + != codec->compress_type) + break; + } + } + ret = snd_soc_init_codec_cache(codec, compress_type); + if (ret < 0) { + mutex_unlock(&card->mutex); + return; + } + } + + /* card bind complete so register a sound card */ + ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, + card->owner, 0, &card->snd_card); + if (ret < 0) { + pr_err("asoc: can't create sound card for card %s: %d\n", + card->name, ret); + mutex_unlock(&card->mutex); + return; + } + card->snd_card->dev = card->dev; + + card->dapm.bias_level = SND_SOC_BIAS_OFF; + card->dapm.dev = card->dev; + card->dapm.card = card; + list_add(&card->dapm.list, &card->dapm_list); + +#ifdef CONFIG_DEBUG_FS + snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root); +#endif + +#ifdef CONFIG_PM_SLEEP + /* deferred resume work */ + INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); +#endif + + if (card->dapm_widgets) + snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, + card->num_dapm_widgets); + + /* initialise the sound card only once */ + if (card->probe) { + ret = card->probe(card); + if (ret < 0) + goto card_probe_error; + } + + /* early DAI link probe */ + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + for (i = 0; i < card->num_links; i++) { + ret = soc_probe_dai_link(card, i, order); + if (ret < 0) { + pr_err("asoc: failed to instantiate card %s: %d\n", + card->name, ret); + goto probe_dai_err; + } + } + } + + for (i = 0; i < card->num_aux_devs; i++) { + ret = soc_probe_aux_dev(card, i); + if (ret < 0) { + pr_err("asoc: failed to add auxiliary devices %s: %d\n", + card->name, ret); + goto probe_aux_dev_err; + } + } + + snd_soc_dapm_link_dai_widgets(card); + + if (card->controls) + snd_soc_add_card_controls(card, card->controls, card->num_controls); + + if (card->dapm_routes) + snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes, + card->num_dapm_routes); + + snd_soc_dapm_new_widgets(&card->dapm); + + for (i = 0; i < card->num_links; i++) { + dai_link = &card->dai_link[i]; + + if (dai_link->dai_fmt) { + ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai, + dai_link->dai_fmt); + if (ret != 0 && ret != -ENOTSUPP) + dev_warn(card->rtd[i].codec_dai->dev, + "Failed to set DAI format: %d\n", + ret); + + ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai, + dai_link->dai_fmt); + if (ret != 0 && ret != -ENOTSUPP) + dev_warn(card->rtd[i].cpu_dai->dev, + "Failed to set DAI format: %d\n", + ret); + } + } + + snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname), + "%s", card->name); + snprintf(card->snd_card->longname, sizeof(card->snd_card->longname), + "%s", card->long_name ? card->long_name : card->name); + snprintf(card->snd_card->driver, sizeof(card->snd_card->driver), + "%s", card->driver_name ? card->driver_name : card->name); + for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) { + switch (card->snd_card->driver[i]) { + case '_': + case '-': + case '\0': + break; + default: + if (!isalnum(card->snd_card->driver[i])) + card->snd_card->driver[i] = '_'; + break; + } + } + + if (card->late_probe) { + ret = card->late_probe(card); + if (ret < 0) { + dev_err(card->dev, "%s late_probe() failed: %d\n", + card->name, ret); + goto probe_aux_dev_err; + } + } + + snd_soc_dapm_new_widgets(&card->dapm); + + if (card->fully_routed) + list_for_each_entry(codec, &card->codec_dev_list, card_list) + snd_soc_dapm_auto_nc_codec_pins(codec); + + ret = snd_card_register(card->snd_card); + if (ret < 0) { + pr_err("asoc: failed to register soundcard for %s: %d\n", + card->name, ret); + goto probe_aux_dev_err; + } + +#ifdef CONFIG_SND_SOC_AC97_BUS + /* register any AC97 codecs */ + for (i = 0; i < card->num_rtd; i++) { + ret = soc_register_ac97_dai_link(&card->rtd[i]); + if (ret < 0) { + pr_err("asoc: failed to register AC97 %s: %d\n", + card->name, ret); + while (--i >= 0) + soc_unregister_ac97_dai_link(card->rtd[i].codec); + goto probe_aux_dev_err; + } + } +#endif + + card->instantiated = 1; + snd_soc_dapm_sync(&card->dapm); + mutex_unlock(&card->mutex); + return; + +probe_aux_dev_err: + for (i = 0; i < card->num_aux_devs; i++) + soc_remove_aux_dev(card, i); + +probe_dai_err: + soc_remove_dai_links(card); + +card_probe_error: + if (card->remove) + card->remove(card); + + snd_card_free(card->snd_card); + + mutex_unlock(&card->mutex); +} + +/* + * Attempt to initialise any uninitialised cards. Must be called with + * client_mutex. + */ +static void snd_soc_instantiate_cards(void) +{ + struct snd_soc_card *card; + list_for_each_entry(card, &card_list, list) + snd_soc_instantiate_card(card); +} + +/* probes a new socdev */ +static int soc_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + int ret = 0; + + /* + * no card, so machine driver should be registering card + * we should not be here in that case so ret error + */ + if (!card) + return -EINVAL; + + dev_warn(&pdev->dev, + "ASoC machine %s should use snd_soc_register_card()\n", + card->name); + + /* Bodge while we unpick instantiation */ + card->dev = &pdev->dev; + + ret = snd_soc_register_card(card); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to register card\n"); + return ret; + } + + return 0; +} + +static int soc_cleanup_card_resources(struct snd_soc_card *card) +{ + int i; + + /* make sure any delayed work runs */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; + flush_delayed_work_sync(&rtd->delayed_work); + } + + /* remove auxiliary devices */ + for (i = 0; i < card->num_aux_devs; i++) + soc_remove_aux_dev(card, i); + + /* remove and free each DAI */ + soc_remove_dai_links(card); + + soc_cleanup_card_debugfs(card); + + /* remove the card */ + if (card->remove) + card->remove(card); + + snd_soc_dapm_free(&card->dapm); + + snd_card_free(card->snd_card); + return 0; + +} + +/* removes a socdev */ +static int soc_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + snd_soc_unregister_card(card); + return 0; +} + +int snd_soc_poweroff(struct device *dev) +{ + struct snd_soc_card *card = dev_get_drvdata(dev); + int i; + + if (!card->instantiated) + return 0; + + /* Flush out pmdown_time work - we actually do want to run it + * now, we're shutting down so no imminent restart. */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; + flush_delayed_work_sync(&rtd->delayed_work); + } + + snd_soc_dapm_shutdown(card); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_poweroff); + +const struct dev_pm_ops snd_soc_pm_ops = { + .suspend = snd_soc_suspend, //PMSG_SUSPEND + .resume = snd_soc_resume, // + .freeze = snd_soc_suspend, //PMSG_FREEZE + .thaw = snd_soc_resume, // + .poweroff = snd_soc_poweroff, //PMSG_HIBERNATE + .restore = snd_soc_resume, // +}; +EXPORT_SYMBOL_GPL(snd_soc_pm_ops); + +/*****add for std 2014-3-24*************/ + +/* powers down audio subsystem for suspend */ +static int soc_suspend(struct platform_device *dev, pm_message_t state) +{ + struct snd_soc_card *card = platform_get_drvdata(dev); + struct snd_soc_codec *codec; + int i; + printk("<<<<<<<<%s, pm state: 0x%x\n", __func__, state.event); + + /* If the initialization of this soc device failed, there is no codec + * associated with it. Just bail out in this case. + */ + if (list_empty(&card->codec_dev_list)) + return 0; + +#if 0 + mutex_lock(&std_pm_mutex); + if (std_dev_suspend) + { + mutex_unlock(&std_pm_mutex); + return 0; + } + std_pdev_suspend = 1; + mutex_unlock(&std_pm_mutex); + + if (std_pdev_suspend) + return 0; + + std_pdev_suspend = 1; +#endif + /* Due to the resume being scheduled into a workqueue we could + * suspend before that's finished - wait for it to complete. + */ + + if (state.event==PM_EVENT_SUSPEND/*0x2*/ || state.event==PM_EVENT_FREEZE/*0x1*/){ //move from device_driver pm + snd_power_lock(card->snd_card); + snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); + snd_power_unlock(card->snd_card); + + /* we're going to block userspace touching us until resume completes */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); + + /* mute any active DACs */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *dai = card->rtd[i].codec_dai; + struct snd_soc_dai_driver *drv = dai->driver; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (drv->ops->digital_mute && dai->playback_active) + drv->ops->digital_mute(dai, 1); + } + + /* suspend all pcms */ + for (i = 0; i < card->num_rtd; i++) { + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + snd_pcm_suspend_all(card->rtd[i].pcm); + } + + if (card->suspend_pre) + card->suspend_pre(card); + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + struct snd_soc_platform *platform = card->rtd[i].platform; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control) + cpu_dai->driver->suspend(cpu_dai); + if (platform->driver->suspend && !platform->suspended) { + platform->driver->suspend(cpu_dai); + platform->suspended = 1; + } + } + + /* close any waiting streams and save state */ + for (i = 0; i < card->num_rtd; i++) { + flush_delayed_work_sync(&card->rtd[i].delayed_work); + card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level; + } + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + snd_soc_dapm_stream_event(&card->rtd[i], + SNDRV_PCM_STREAM_PLAYBACK, + codec_dai, + SND_SOC_DAPM_STREAM_SUSPEND); + + snd_soc_dapm_stream_event(&card->rtd[i], + SNDRV_PCM_STREAM_CAPTURE, + codec_dai, + SND_SOC_DAPM_STREAM_SUSPEND); + } + + /* suspend all CODECs */ + list_for_each_entry(codec, &card->codec_dev_list, card_list) { + /* If there are paths active then the CODEC will be held with + * bias _ON and should not be suspended. */ + if (!codec->suspended && codec->driver->suspend) { + switch (codec->dapm.bias_level) { + case SND_SOC_BIAS_STANDBY: + /* + * If the CODEC is capable of idle + * bias off then being in STANDBY + * means it's doing something, + * otherwise fall through. + */ + if (codec->dapm.idle_bias_off) { + dev_dbg(codec->dev, + "idle_bias_off CODEC on over suspend\n"); + break; + } + case SND_SOC_BIAS_OFF: + codec->driver->suspend(codec); + codec->suspended = 1; + codec->cache_sync = 1; + break; + default: + dev_dbg(codec->dev, "CODEC is on over suspend\n"); + break; + } + } + } + + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + + if (card->rtd[i].dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control) + cpu_dai->driver->suspend(cpu_dai); + } + + if (card->suspend_post) + card->suspend_post(card); + + return 0; + } + + if (state.event == PM_EVENT_HIBERNATE) { // 0x4 + + /* Flush out pmdown_time work - we actually do want to run it + * now, we're shutting down so no imminent restart. */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; + flush_delayed_work_sync(&rtd->delayed_work); + } + + snd_soc_dapm_shutdown(card); + + return 0; + + } + + return 0; +} + +/* powers up audio subsystem after a suspend */ +int soc_resume(struct platform_device *dev) +{ + struct snd_soc_card *card = platform_get_drvdata(dev); + int i, ac97_control = 0; + + printk("<<<<<%s\n", __func__); + +#if 0 + if (std_pdev_suspend) + std_pdev_suspend = 0; + else + return 0; +#endif + /* If the initialization of this soc device failed, there is no codec + * associated with it. Just bail out in this case. + */ + if (list_empty(&card->codec_dev_list)) + return 0; +#if 0 + mutex_lock(&std_pm_mutex); + if (std_dev_suspend) + { + mutex_unlock(&std_pm_mutex); + return 0; + } + std_pdev_suspend = 0; + mutex_unlock(&std_pm_mutex); +#endif + + /* AC97 devices might have other drivers hanging off them so + * need to resume immediately. Other drivers don't have that + * problem and may take a substantial amount of time to resume + * due to I/O costs and anti-pop so handle them out of line. + */ + for (i = 0; i < card->num_rtd; i++) { + struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; + ac97_control |= cpu_dai->driver->ac97_control; + } + if (ac97_control) { + dev_dbg(dev, "Resuming AC97 immediately\n"); + soc_resume_deferred(&card->deferred_resume_work); + } else { + dev_dbg(dev, "Scheduling resume work\n"); + if (!schedule_work(&card->deferred_resume_work)) + dev_err(dev, "resume work item may be lost\n"); + } + + return 0; +} + +/*********************************************/ + +/* ASoC platform driver */ +static struct platform_driver soc_driver = { + .driver = { + .name = "soc-audio", + .owner = THIS_MODULE, + //.pm = &snd_soc_pm_ops, + }, + .probe = soc_probe, + .remove = soc_remove, + .suspend = soc_suspend, + .resume = soc_resume, +}; + +/** + * snd_soc_codec_volatile_register: Report if a register is volatile. + * + * @codec: CODEC to query. + * @reg: Register to query. + * + * Boolean function indiciating if a CODEC register is volatile. + */ +int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, + unsigned int reg) +{ + if (codec->volatile_register) + return codec->volatile_register(codec, reg); + else + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register); + +/** + * snd_soc_codec_readable_register: Report if a register is readable. + * + * @codec: CODEC to query. + * @reg: Register to query. + * + * Boolean function indicating if a CODEC register is readable. + */ +int snd_soc_codec_readable_register(struct snd_soc_codec *codec, + unsigned int reg) +{ + if (codec->readable_register) + return codec->readable_register(codec, reg); + else + return 1; +} +EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register); + +/** + * snd_soc_codec_writable_register: Report if a register is writable. + * + * @codec: CODEC to query. + * @reg: Register to query. + * + * Boolean function indicating if a CODEC register is writable. + */ +int snd_soc_codec_writable_register(struct snd_soc_codec *codec, + unsigned int reg) +{ + if (codec->writable_register) + return codec->writable_register(codec, reg); + else + return 1; +} +EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register); + +int snd_soc_platform_read(struct snd_soc_platform *platform, + unsigned int reg) +{ + unsigned int ret; + + if (!platform->driver->read) { + dev_err(platform->dev, "platform has no read back\n"); + return -1; + } + + ret = platform->driver->read(platform, reg); + dev_dbg(platform->dev, "read %x => %x\n", reg, ret); + trace_snd_soc_preg_read(platform, reg, ret); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_platform_read); + +int snd_soc_platform_write(struct snd_soc_platform *platform, + unsigned int reg, unsigned int val) +{ + if (!platform->driver->write) { + dev_err(platform->dev, "platform has no write back\n"); + return -1; + } + + dev_dbg(platform->dev, "write %x = %x\n", reg, val); + trace_snd_soc_preg_write(platform, reg, val); + return platform->driver->write(platform, reg, val); +} +EXPORT_SYMBOL_GPL(snd_soc_platform_write); + +/** + * snd_soc_new_ac97_codec - initailise AC97 device + * @codec: audio codec + * @ops: AC97 bus operations + * @num: AC97 codec number + * + * Initialises AC97 codec resources for use by ad-hoc devices only. + */ +int snd_soc_new_ac97_codec(struct snd_soc_codec *codec, + struct snd_ac97_bus_ops *ops, int num) +{ + mutex_lock(&codec->mutex); + + codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL); + if (codec->ac97 == NULL) { + mutex_unlock(&codec->mutex); + return -ENOMEM; + } + + codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL); + if (codec->ac97->bus == NULL) { + kfree(codec->ac97); + codec->ac97 = NULL; + mutex_unlock(&codec->mutex); + return -ENOMEM; + } + + codec->ac97->bus->ops = ops; + codec->ac97->num = num; + + /* + * Mark the AC97 device to be created by us. This way we ensure that the + * device will be registered with the device subsystem later on. + */ + codec->ac97_created = 1; + + mutex_unlock(&codec->mutex); + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec); + +/** + * snd_soc_free_ac97_codec - free AC97 codec device + * @codec: audio codec + * + * Frees AC97 codec device resources. + */ +void snd_soc_free_ac97_codec(struct snd_soc_codec *codec) +{ + mutex_lock(&codec->mutex); +#ifdef CONFIG_SND_SOC_AC97_BUS + soc_unregister_ac97_dai_link(codec); +#endif + kfree(codec->ac97->bus); + kfree(codec->ac97); + codec->ac97 = NULL; + codec->ac97_created = 0; + mutex_unlock(&codec->mutex); +} +EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec); + +unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg) +{ + unsigned int ret; + + ret = codec->read(codec, reg); + dev_dbg(codec->dev, "read %x => %x\n", reg, ret); + trace_snd_soc_reg_read(codec, reg, ret); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_read); + +unsigned int snd_soc_write(struct snd_soc_codec *codec, + unsigned int reg, unsigned int val) +{ + dev_dbg(codec->dev, "write %x = %x\n", reg, val); + trace_snd_soc_reg_write(codec, reg, val); + return codec->write(codec, reg, val); +} +EXPORT_SYMBOL_GPL(snd_soc_write); + +unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec, + unsigned int reg, const void *data, size_t len) +{ + return codec->bulk_write_raw(codec, reg, data, len); +} +EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw); + +/** + * snd_soc_update_bits - update codec register bits + * @codec: audio codec + * @reg: codec register + * @mask: register mask + * @value: new value + * + * Writes new register value. + * + * Returns 1 for change, 0 for no change, or negative error code. + */ +int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg, + unsigned int mask, unsigned int value) +{ + bool change; + unsigned int old, new; + int ret; + + if (codec->using_regmap) { + ret = regmap_update_bits_check(codec->control_data, reg, + mask, value, &change); + } else { + ret = snd_soc_read(codec, reg); + if (ret < 0) + return ret; + + old = ret; + new = (old & ~mask) | (value & mask); + change = old != new; + if (change) + ret = snd_soc_write(codec, reg, new); + } + + if (ret < 0) + return ret; + + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_update_bits); + +/** + * snd_soc_update_bits_locked - update codec register bits + * @codec: audio codec + * @reg: codec register + * @mask: register mask + * @value: new value + * + * Writes new register value, and takes the codec mutex. + * + * Returns 1 for change else 0. + */ +int snd_soc_update_bits_locked(struct snd_soc_codec *codec, + unsigned short reg, unsigned int mask, + unsigned int value) +{ + int change; + + mutex_lock(&codec->mutex); + change = snd_soc_update_bits(codec, reg, mask, value); + mutex_unlock(&codec->mutex); + + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked); + +/** + * snd_soc_test_bits - test register for change + * @codec: audio codec + * @reg: codec register + * @mask: register mask + * @value: new value + * + * Tests a register with a new value and checks if the new value is + * different from the old value. + * + * Returns 1 for change else 0. + */ +int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg, + unsigned int mask, unsigned int value) +{ + int change; + unsigned int old, new; + + old = snd_soc_read(codec, reg); + new = (old & ~mask) | value; + change = old != new; + + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_test_bits); + +/** + * snd_soc_set_runtime_hwparams - set the runtime hardware parameters + * @substream: the pcm substream + * @hw: the hardware parameters + * + * Sets the substream runtime hardware parameters. + */ +int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, + const struct snd_pcm_hardware *hw) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + runtime->hw.info = hw->info; + runtime->hw.formats = hw->formats; + runtime->hw.period_bytes_min = hw->period_bytes_min; + runtime->hw.period_bytes_max = hw->period_bytes_max; + runtime->hw.periods_min = hw->periods_min; + runtime->hw.periods_max = hw->periods_max; + runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; + runtime->hw.fifo_size = hw->fifo_size; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); + +/** + * snd_soc_cnew - create new control + * @_template: control template + * @data: control private data + * @long_name: control long name + * @prefix: control name prefix + * + * Create a new mixer control from a template control. + * + * Returns 0 for success, else error. + */ +struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, + void *data, const char *long_name, + const char *prefix) +{ + struct snd_kcontrol_new template; + struct snd_kcontrol *kcontrol; + char *name = NULL; + int name_len; + + memcpy(&template, _template, sizeof(template)); + template.index = 0; + + if (!long_name) + long_name = template.name; + + if (prefix) { + name_len = strlen(long_name) + strlen(prefix) + 2; + name = kmalloc(name_len, GFP_KERNEL); + if (!name) + return NULL; + + snprintf(name, name_len, "%s %s", prefix, long_name); + + template.name = name; + } else { + template.name = long_name; + } + + kcontrol = snd_ctl_new1(&template, data); + + kfree(name); + + return kcontrol; +} +EXPORT_SYMBOL_GPL(snd_soc_cnew); + +static int snd_soc_add_controls(struct snd_card *card, struct device *dev, + const struct snd_kcontrol_new *controls, int num_controls, + const char *prefix, void *data) +{ + int err, i; + + for (i = 0; i < num_controls; i++) { + const struct snd_kcontrol_new *control = &controls[i]; + err = snd_ctl_add(card, snd_soc_cnew(control, data, + control->name, prefix)); + if (err < 0) { + dev_err(dev, "Failed to add %s: %d\n", control->name, err); + return err; + } + } + + return 0; +} + +/** + * snd_soc_add_codec_controls - add an array of controls to a codec. + * Convenience function to add a list of controls. Many codecs were + * duplicating this code. + * + * @codec: codec to add controls to + * @controls: array of controls to add + * @num_controls: number of elements in the array + * + * Return 0 for success, else error. + */ +int snd_soc_add_codec_controls(struct snd_soc_codec *codec, + const struct snd_kcontrol_new *controls, int num_controls) +{ + struct snd_card *card = codec->card->snd_card; + + return snd_soc_add_controls(card, codec->dev, controls, num_controls, + codec->name_prefix, codec); +} +EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls); + +/** + * snd_soc_add_platform_controls - add an array of controls to a platform. + * Convenience function to add a list of controls. + * + * @platform: platform to add controls to + * @controls: array of controls to add + * @num_controls: number of elements in the array + * + * Return 0 for success, else error. + */ +int snd_soc_add_platform_controls(struct snd_soc_platform *platform, + const struct snd_kcontrol_new *controls, int num_controls) +{ + struct snd_card *card = platform->card->snd_card; + + return snd_soc_add_controls(card, platform->dev, controls, num_controls, + NULL, platform); +} +EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls); + +/** + * snd_soc_add_card_controls - add an array of controls to a SoC card. + * Convenience function to add a list of controls. + * + * @soc_card: SoC card to add controls to + * @controls: array of controls to add + * @num_controls: number of elements in the array + * + * Return 0 for success, else error. + */ +int snd_soc_add_card_controls(struct snd_soc_card *soc_card, + const struct snd_kcontrol_new *controls, int num_controls) +{ + struct snd_card *card = soc_card->snd_card; + + return snd_soc_add_controls(card, soc_card->dev, controls, num_controls, + NULL, soc_card); +} +EXPORT_SYMBOL_GPL(snd_soc_add_card_controls); + +/** + * snd_soc_add_dai_controls - add an array of controls to a DAI. + * Convienience function to add a list of controls. + * + * @dai: DAI to add controls to + * @controls: array of controls to add + * @num_controls: number of elements in the array + * + * Return 0 for success, else error. + */ +int snd_soc_add_dai_controls(struct snd_soc_dai *dai, + const struct snd_kcontrol_new *controls, int num_controls) +{ + struct snd_card *card = dai->card->snd_card; + + return snd_soc_add_controls(card, dai->dev, controls, num_controls, + NULL, dai); +} +EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls); + +/** + * snd_soc_info_enum_double - enumerated double mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a double enumerated + * mixer control. + * + * Returns 0 for success. + */ +int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + uinfo->count = e->shift_l == e->shift_r ? 1 : 2; + uinfo->value.enumerated.items = e->max; + + if (uinfo->value.enumerated.item > e->max - 1) + uinfo->value.enumerated.item = e->max - 1; + strcpy(uinfo->value.enumerated.name, + e->texts[uinfo->value.enumerated.item]); + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_enum_double); + +/** + * snd_soc_get_enum_double - enumerated double mixer get callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to get the value of a double enumerated mixer. + * + * Returns 0 for success. + */ +int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int val, bitmask; + + for (bitmask = 1; bitmask < e->max; bitmask <<= 1) + ; + val = snd_soc_read(codec, e->reg); + ucontrol->value.enumerated.item[0] + = (val >> e->shift_l) & (bitmask - 1); + if (e->shift_l != e->shift_r) + ucontrol->value.enumerated.item[1] = + (val >> e->shift_r) & (bitmask - 1); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_get_enum_double); + +/** + * snd_soc_put_enum_double - enumerated double mixer put callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to set the value of a double enumerated mixer. + * + * Returns 0 for success. + */ +int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int val; + unsigned int mask, bitmask; + + for (bitmask = 1; bitmask < e->max; bitmask <<= 1) + ; + if (ucontrol->value.enumerated.item[0] > e->max - 1) + return -EINVAL; + val = ucontrol->value.enumerated.item[0] << e->shift_l; + mask = (bitmask - 1) << e->shift_l; + if (e->shift_l != e->shift_r) { + if (ucontrol->value.enumerated.item[1] > e->max - 1) + return -EINVAL; + val |= ucontrol->value.enumerated.item[1] << e->shift_r; + mask |= (bitmask - 1) << e->shift_r; + } + + return snd_soc_update_bits_locked(codec, e->reg, mask, val); +} +EXPORT_SYMBOL_GPL(snd_soc_put_enum_double); + +/** + * snd_soc_get_value_enum_double - semi enumerated double mixer get callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to get the value of a double semi enumerated mixer. + * + * Semi enumerated mixer: the enumerated items are referred as values. Can be + * used for handling bitfield coded enumeration for example. + * + * Returns 0 for success. + */ +int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int reg_val, val, mux; + + reg_val = snd_soc_read(codec, e->reg); + val = (reg_val >> e->shift_l) & e->mask; + for (mux = 0; mux < e->max; mux++) { + if (val == e->values[mux]) + break; + } + ucontrol->value.enumerated.item[0] = mux; + if (e->shift_l != e->shift_r) { + val = (reg_val >> e->shift_r) & e->mask; + for (mux = 0; mux < e->max; mux++) { + if (val == e->values[mux]) + break; + } + ucontrol->value.enumerated.item[1] = mux; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double); + +/** + * snd_soc_put_value_enum_double - semi enumerated double mixer put callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to set the value of a double semi enumerated mixer. + * + * Semi enumerated mixer: the enumerated items are referred as values. Can be + * used for handling bitfield coded enumeration for example. + * + * Returns 0 for success. + */ +int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int val; + unsigned int mask; + + if (ucontrol->value.enumerated.item[0] > e->max - 1) + return -EINVAL; + val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l; + mask = e->mask << e->shift_l; + if (e->shift_l != e->shift_r) { + if (ucontrol->value.enumerated.item[1] > e->max - 1) + return -EINVAL; + val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r; + mask |= e->mask << e->shift_r; + } + + return snd_soc_update_bits_locked(codec, e->reg, mask, val); +} +EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double); + +/** + * snd_soc_info_enum_ext - external enumerated single mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about an external enumerated + * single mixer. + * + * Returns 0 for success. + */ +int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + uinfo->count = 1; + uinfo->value.enumerated.items = e->max; + + if (uinfo->value.enumerated.item > e->max - 1) + uinfo->value.enumerated.item = e->max - 1; + strcpy(uinfo->value.enumerated.name, + e->texts[uinfo->value.enumerated.item]); + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext); + +/** + * snd_soc_info_volsw_ext - external single mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a single external mixer control. + * + * Returns 0 for success. + */ +int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + int max = kcontrol->private_value; + + if (max == 1 && !strstr(kcontrol->id.name, " Volume")) + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + else + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = max; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext); + +/** + * snd_soc_info_volsw - single mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a single mixer control, or a double + * mixer control that spans 2 registers. + * + * Returns 0 for success. + */ +int snd_soc_info_volsw(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + int platform_max; + + if (!mc->platform_max) + mc->platform_max = mc->max; + platform_max = mc->platform_max; + + if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume")) + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + else + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + + uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = platform_max; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw); + +/** + * snd_soc_get_volsw - single mixer get callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to get the value of a single mixer control, or a double mixer + * control that spans 2 registers. + * + * Returns 0 for success. + */ +int snd_soc_get_volsw(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned int reg = mc->reg; + unsigned int reg2 = mc->rreg; + unsigned int shift = mc->shift; + unsigned int rshift = mc->rshift; + int max = mc->max; + unsigned int mask = (1 << fls(max)) - 1; + unsigned int invert = mc->invert; + + ucontrol->value.integer.value[0] = + (snd_soc_read(codec, reg) >> shift) & mask; + if (invert) + ucontrol->value.integer.value[0] = + max - ucontrol->value.integer.value[0]; + + if (snd_soc_volsw_is_stereo(mc)) { + if (reg == reg2) + ucontrol->value.integer.value[1] = + (snd_soc_read(codec, reg) >> rshift) & mask; + else + ucontrol->value.integer.value[1] = + (snd_soc_read(codec, reg2) >> shift) & mask; + if (invert) + ucontrol->value.integer.value[1] = + max - ucontrol->value.integer.value[1]; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_get_volsw); + +/** + * snd_soc_put_volsw - single mixer put callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to set the value of a single mixer control, or a double mixer + * control that spans 2 registers. + * + * Returns 0 for success. + */ +int snd_soc_put_volsw(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned int reg = mc->reg; + unsigned int reg2 = mc->rreg; + unsigned int shift = mc->shift; + unsigned int rshift = mc->rshift; + int max = mc->max; + unsigned int mask = (1 << fls(max)) - 1; + unsigned int invert = mc->invert; + int err; + bool type_2r = 0; + unsigned int val2 = 0; + unsigned int val, val_mask; + + val = (ucontrol->value.integer.value[0] & mask); + if (invert) + val = max - val; + val_mask = mask << shift; + val = val << shift; + if (snd_soc_volsw_is_stereo(mc)) { + val2 = (ucontrol->value.integer.value[1] & mask); + if (invert) + val2 = max - val2; + if (reg == reg2) { + val_mask |= mask << rshift; + val |= val2 << rshift; + } else { + val2 = val2 << shift; + type_2r = 1; + } + } + err = snd_soc_update_bits_locked(codec, reg, val_mask, val); + if (err < 0) + return err; + + if (type_2r) + err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2); + + return err; +} +EXPORT_SYMBOL_GPL(snd_soc_put_volsw); + +/** + * snd_soc_info_volsw_s8 - signed mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a signed mixer control. + * + * Returns 0 for success. + */ +int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + int platform_max; + int min = mc->min; + + if (!mc->platform_max) + mc->platform_max = mc->max; + platform_max = mc->platform_max; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = platform_max - min; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8); + +/** + * snd_soc_get_volsw_s8 - signed mixer get callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to get the value of a signed mixer control. + * + * Returns 0 for success. + */ +int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned int reg = mc->reg; + int min = mc->min; + int val = snd_soc_read(codec, reg); + + ucontrol->value.integer.value[0] = + ((signed char)(val & 0xff))-min; + ucontrol->value.integer.value[1] = + ((signed char)((val >> 8) & 0xff))-min; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8); + +/** + * snd_soc_put_volsw_sgn - signed mixer put callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to set the value of a signed mixer control. + * + * Returns 0 for success. + */ +int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned int reg = mc->reg; + int min = mc->min; + unsigned int val; + + val = (ucontrol->value.integer.value[0]+min) & 0xff; + val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8; + + return snd_soc_update_bits_locked(codec, reg, 0xffff, val); +} +EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8); + +/** + * snd_soc_limit_volume - Set new limit to an existing volume control. + * + * @codec: where to look for the control + * @name: Name of the control + * @max: new maximum limit + * + * Return 0 for success, else error. + */ +int snd_soc_limit_volume(struct snd_soc_codec *codec, + const char *name, int max) +{ + struct snd_card *card = codec->card->snd_card; + struct snd_kcontrol *kctl; + struct soc_mixer_control *mc; + int found = 0; + int ret = -EINVAL; + + /* Sanity check for name and max */ + if (unlikely(!name || max <= 0)) + return -EINVAL; + + list_for_each_entry(kctl, &card->controls, list) { + if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) { + found = 1; + break; + } + } + if (found) { + mc = (struct soc_mixer_control *)kctl->private_value; + if (max <= mc->max) { + mc->platform_max = max; + ret = 0; + } + } + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_limit_volume); + +/** + * snd_soc_info_volsw_2r_sx - double with tlv and variable data size + * mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Returns 0 for success. + */ +int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + int max = mc->max; + int min = mc->min; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = max-min; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx); + +/** + * snd_soc_get_volsw_2r_sx - double with tlv and variable data size + * mixer get callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Returns 0 for success. + */ +int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned int mask = (1<<mc->shift)-1; + int min = mc->min; + int val = snd_soc_read(codec, mc->reg) & mask; + int valr = snd_soc_read(codec, mc->rreg) & mask; + + ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask; + ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx); + +/** + * snd_soc_put_volsw_2r_sx - double with tlv and variable data size + * mixer put callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Returns 0 for success. + */ +int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned int mask = (1<<mc->shift)-1; + int min = mc->min; + int ret; + unsigned int val, valr, oval, ovalr; + + val = ((ucontrol->value.integer.value[0]+min) & 0xff); + val &= mask; + valr = ((ucontrol->value.integer.value[1]+min) & 0xff); + valr &= mask; + + oval = snd_soc_read(codec, mc->reg) & mask; + ovalr = snd_soc_read(codec, mc->rreg) & mask; + + ret = 0; + if (oval != val) { + ret = snd_soc_write(codec, mc->reg, val); + if (ret < 0) + return ret; + } + if (ovalr != valr) { + ret = snd_soc_write(codec, mc->rreg, valr); + if (ret < 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx); + +int snd_soc_bytes_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct soc_bytes *params = (void *)kcontrol->private_value; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; + uinfo->count = params->num_regs * codec->val_bytes; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_bytes_info); + +int snd_soc_bytes_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_bytes *params = (void *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + int ret; + + if (codec->using_regmap) + ret = regmap_raw_read(codec->control_data, params->base, + ucontrol->value.bytes.data, + params->num_regs * codec->val_bytes); + else + ret = -EINVAL; + + /* Hide any masked bytes to ensure consistent data reporting */ + if (ret == 0 && params->mask) { + switch (codec->val_bytes) { + case 1: + ucontrol->value.bytes.data[0] &= ~params->mask; + break; + case 2: + ((u16 *)(&ucontrol->value.bytes.data))[0] + &= ~params->mask; + break; + case 4: + ((u32 *)(&ucontrol->value.bytes.data))[0] + &= ~params->mask; + break; + default: + return -EINVAL; + } + } + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_bytes_get); + +int snd_soc_bytes_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_bytes *params = (void *)kcontrol->private_value; + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + int ret, len; + unsigned int val; + void *data; + + if (!codec->using_regmap) + return -EINVAL; + + data = ucontrol->value.bytes.data; + len = params->num_regs * codec->val_bytes; + + /* + * If we've got a mask then we need to preserve the register + * bits. We shouldn't modify the incoming data so take a + * copy. + */ + if (params->mask) { + ret = regmap_read(codec->control_data, params->base, &val); + if (ret != 0) + return ret; + + val &= params->mask; + + data = kmemdup(data, len, GFP_KERNEL); + if (!data) + return -ENOMEM; + + switch (codec->val_bytes) { + case 1: + ((u8 *)data)[0] &= ~params->mask; + ((u8 *)data)[0] |= val; + break; + case 2: + ((u16 *)data)[0] &= cpu_to_be16(~params->mask); + ((u16 *)data)[0] |= cpu_to_be16(val); + break; + case 4: + ((u32 *)data)[0] &= cpu_to_be32(~params->mask); + ((u32 *)data)[0] |= cpu_to_be32(val); + break; + default: + return -EINVAL; + } + } + + ret = regmap_raw_write(codec->control_data, params->base, + data, len); + + if (params->mask) + kfree(data); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_bytes_put); + +/** + * snd_soc_dai_set_sysclk - configure DAI system or master clock. + * @dai: DAI + * @clk_id: DAI specific clock ID + * @freq: new clock frequency in Hz + * @dir: new clock direction - input/output. + * + * Configures the DAI master (MCLK) or system (SYSCLK) clocking. + */ +int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + if (dai->driver && dai->driver->ops->set_sysclk) + return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir); + else if (dai->codec && dai->codec->driver->set_sysclk) + return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0, + freq, dir); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); + +/** + * snd_soc_codec_set_sysclk - configure CODEC system or master clock. + * @codec: CODEC + * @clk_id: DAI specific clock ID + * @source: Source for the clock + * @freq: new clock frequency in Hz + * @dir: new clock direction - input/output. + * + * Configures the CODEC master (MCLK) or system (SYSCLK) clocking. + */ +int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id, + int source, unsigned int freq, int dir) +{ + if (codec->driver->set_sysclk) + return codec->driver->set_sysclk(codec, clk_id, source, + freq, dir); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk); + +/** + * snd_soc_dai_set_clkdiv - configure DAI clock dividers. + * @dai: DAI + * @div_id: DAI specific clock divider ID + * @div: new clock divisor. + * + * Configures the clock dividers. This is used to derive the best DAI bit and + * frame clocks from the system or master clock. It's best to set the DAI bit + * and frame clocks as low as possible to save system power. + */ +int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, + int div_id, int div) +{ + if (dai->driver && dai->driver->ops->set_clkdiv) + return dai->driver->ops->set_clkdiv(dai, div_id, div); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); + +/** + * snd_soc_dai_set_pll - configure DAI PLL. + * @dai: DAI + * @pll_id: DAI specific PLL ID + * @source: DAI specific source for the PLL + * @freq_in: PLL input clock frequency in Hz + * @freq_out: requested PLL output clock frequency in Hz + * + * Configures and enables PLL to generate output clock based on input clock. + */ +int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, + unsigned int freq_in, unsigned int freq_out) +{ + if (dai->driver && dai->driver->ops->set_pll) + return dai->driver->ops->set_pll(dai, pll_id, source, + freq_in, freq_out); + else if (dai->codec && dai->codec->driver->set_pll) + return dai->codec->driver->set_pll(dai->codec, pll_id, source, + freq_in, freq_out); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); + +/* + * snd_soc_codec_set_pll - configure codec PLL. + * @codec: CODEC + * @pll_id: DAI specific PLL ID + * @source: DAI specific source for the PLL + * @freq_in: PLL input clock frequency in Hz + * @freq_out: requested PLL output clock frequency in Hz + * + * Configures and enables PLL to generate output clock based on input clock. + */ +int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source, + unsigned int freq_in, unsigned int freq_out) +{ + if (codec->driver->set_pll) + return codec->driver->set_pll(codec, pll_id, source, + freq_in, freq_out); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll); + +/** + * snd_soc_dai_set_fmt - configure DAI hardware audio format. + * @dai: DAI + * @fmt: SND_SOC_DAIFMT_ format value. + * + * Configures the DAI hardware format and clocking. + */ +int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + if (dai->driver == NULL) + return -EINVAL; + if (dai->driver->ops->set_fmt == NULL) + return -ENOTSUPP; + return dai->driver->ops->set_fmt(dai, fmt); +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); + +/** + * snd_soc_dai_set_tdm_slot - configure DAI TDM. + * @dai: DAI + * @tx_mask: bitmask representing active TX slots. + * @rx_mask: bitmask representing active RX slots. + * @slots: Number of slots in use. + * @slot_width: Width in bits for each slot. + * + * Configures a DAI for TDM operation. Both mask and slots are codec and DAI + * specific. + */ +int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, + unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) +{ + if (dai->driver && dai->driver->ops->set_tdm_slot) + return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask, + slots, slot_width); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); + +/** + * snd_soc_dai_set_channel_map - configure DAI audio channel map + * @dai: DAI + * @tx_num: how many TX channels + * @tx_slot: pointer to an array which imply the TX slot number channel + * 0~num-1 uses + * @rx_num: how many RX channels + * @rx_slot: pointer to an array which imply the RX slot number channel + * 0~num-1 uses + * + * configure the relationship between channel number and TDM slot number. + */ +int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai, + unsigned int tx_num, unsigned int *tx_slot, + unsigned int rx_num, unsigned int *rx_slot) +{ + if (dai->driver && dai->driver->ops->set_channel_map) + return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot, + rx_num, rx_slot); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map); + +/** + * snd_soc_dai_set_tristate - configure DAI system or master clock. + * @dai: DAI + * @tristate: tristate enable + * + * Tristates the DAI so that others can use it. + */ +int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) +{ + if (dai->driver && dai->driver->ops->set_tristate) + return dai->driver->ops->set_tristate(dai, tristate); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); + +/** + * snd_soc_dai_digital_mute - configure DAI system or master clock. + * @dai: DAI + * @mute: mute enable + * + * Mutes the DAI DAC. + */ +int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute) +{ + if (dai->driver && dai->driver->ops->digital_mute) + return dai->driver->ops->digital_mute(dai, mute); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); + +/** + * snd_soc_register_card - Register a card with the ASoC core + * + * @card: Card to register + * + */ +int snd_soc_register_card(struct snd_soc_card *card) +{ + int i; + + if (!card->name || !card->dev) + return -EINVAL; + + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai_link *link = &card->dai_link[i]; + + /* + * Codec must be specified by 1 of name or OF node, + * not both or neither. + */ + if (!!link->codec_name == !!link->codec_of_node) { + dev_err(card->dev, + "Neither/both codec name/of_node are set for %s\n", + link->name); + return -EINVAL; + } + + /* + * Platform may be specified by either name or OF node, but + * can be left unspecified, and a dummy platform will be used. + */ + if (link->platform_name && link->platform_of_node) { + dev_err(card->dev, + "Both platform name/of_node are set for %s\n", link->name); + return -EINVAL; + } + + /* + * CPU DAI must be specified by 1 of name or OF node, + * not both or neither. + */ + if (!!link->cpu_dai_name == !!link->cpu_dai_of_node) { + dev_err(card->dev, + "Neither/both cpu_dai name/of_node are set for %s\n", + link->name); + return -EINVAL; + } + } + + dev_set_drvdata(card->dev, card); + + snd_soc_initialize_card_lists(card); + + soc_init_card_debugfs(card); + + card->rtd = devm_kzalloc(card->dev, + sizeof(struct snd_soc_pcm_runtime) * + (card->num_links + card->num_aux_devs), + GFP_KERNEL); + if (card->rtd == NULL) + return -ENOMEM; + card->num_rtd = 0; + card->rtd_aux = &card->rtd[card->num_links]; + + for (i = 0; i < card->num_links; i++) + card->rtd[i].dai_link = &card->dai_link[i]; + + INIT_LIST_HEAD(&card->list); + INIT_LIST_HEAD(&card->dapm_dirty); + card->instantiated = 0; + mutex_init(&card->mutex); + mutex_init(&card->dapm_mutex); + + mutex_lock(&client_mutex); + list_add(&card->list, &card_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + dev_dbg(card->dev, "Registered card '%s'\n", card->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_register_card); + +/** + * snd_soc_unregister_card - Unregister a card with the ASoC core + * + * @card: Card to unregister + * + */ +int snd_soc_unregister_card(struct snd_soc_card *card) +{ + if (card->instantiated) + soc_cleanup_card_resources(card); + mutex_lock(&client_mutex); + list_del(&card->list); + mutex_unlock(&client_mutex); + dev_dbg(card->dev, "Unregistered card '%s'\n", card->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_card); + +/* + * Simplify DAI link configuration by removing ".-1" from device names + * and sanitizing names. + */ +static char *fmt_single_name(struct device *dev, int *id) +{ + char *found, name[NAME_SIZE]; + int id1, id2; + + if (dev_name(dev) == NULL) + return NULL; + + strlcpy(name, dev_name(dev), NAME_SIZE); + + /* are we a "%s.%d" name (platform and SPI components) */ + found = strstr(name, dev->driver->name); + if (found) { + /* get ID */ + if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) { + + /* discard ID from name if ID == -1 */ + if (*id == -1) + found[strlen(dev->driver->name)] = '\0'; + } + + } else { + /* I2C component devices are named "bus-addr" */ + if (sscanf(name, "%x-%x", &id1, &id2) == 2) { + char tmp[NAME_SIZE]; + + /* create unique ID number from I2C addr and bus */ + *id = ((id1 & 0xffff) << 16) + id2; + + /* sanitize component name for DAI link creation */ + snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name); + strlcpy(name, tmp, NAME_SIZE); + } else + *id = 0; + } + + return kstrdup(name, GFP_KERNEL); +} + +/* + * Simplify DAI link naming for single devices with multiple DAIs by removing + * any ".-1" and using the DAI name (instead of device name). + */ +static inline char *fmt_multiple_name(struct device *dev, + struct snd_soc_dai_driver *dai_drv) +{ + if (dai_drv->name == NULL) { + pr_err("asoc: error - multiple DAI %s registered with no name\n", + dev_name(dev)); + return NULL; + } + + return kstrdup(dai_drv->name, GFP_KERNEL); +} + +/** + * snd_soc_register_dai - Register a DAI with the ASoC core + * + * @dai: DAI to register + */ +int snd_soc_register_dai(struct device *dev, + struct snd_soc_dai_driver *dai_drv) +{ + struct snd_soc_dai *dai; + + dev_dbg(dev, "dai register %s\n", dev_name(dev)); + + dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); + if (dai == NULL) + return -ENOMEM; + + /* create DAI component name */ + dai->name = fmt_single_name(dev, &dai->id); + if (dai->name == NULL) { + kfree(dai); + return -ENOMEM; + } + + dai->dev = dev; + dai->driver = dai_drv; + if (!dai->driver->ops) + dai->driver->ops = &null_dai_ops; + + mutex_lock(&client_mutex); + list_add(&dai->list, &dai_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + pr_debug("Registered DAI '%s'\n", dai->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_register_dai); + +/** + * snd_soc_unregister_dai - Unregister a DAI from the ASoC core + * + * @dai: DAI to unregister + */ +void snd_soc_unregister_dai(struct device *dev) +{ + struct snd_soc_dai *dai; + + list_for_each_entry(dai, &dai_list, list) { + if (dev == dai->dev) + goto found; + } + return; + +found: + mutex_lock(&client_mutex); + list_del(&dai->list); + mutex_unlock(&client_mutex); + + pr_debug("Unregistered DAI '%s'\n", dai->name); + kfree(dai->name); + kfree(dai); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_dai); + +/** + * snd_soc_register_dais - Register multiple DAIs with the ASoC core + * + * @dai: Array of DAIs to register + * @count: Number of DAIs + */ +int snd_soc_register_dais(struct device *dev, + struct snd_soc_dai_driver *dai_drv, size_t count) +{ + struct snd_soc_dai *dai; + int i, ret = 0; + + dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count); + + for (i = 0; i < count; i++) { + + dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); + if (dai == NULL) { + ret = -ENOMEM; + goto err; + } + + /* create DAI component name */ + dai->name = fmt_multiple_name(dev, &dai_drv[i]); + if (dai->name == NULL) { + kfree(dai); + ret = -EINVAL; + goto err; + } + + dai->dev = dev; + dai->driver = &dai_drv[i]; + if (dai->driver->id) + dai->id = dai->driver->id; + else + dai->id = i; + if (!dai->driver->ops) + dai->driver->ops = &null_dai_ops; + + mutex_lock(&client_mutex); + list_add(&dai->list, &dai_list); + mutex_unlock(&client_mutex); + + pr_debug("Registered DAI '%s'\n", dai->name); + } + + mutex_lock(&client_mutex); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + return 0; + +err: + for (i--; i >= 0; i--) + snd_soc_unregister_dai(dev); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_register_dais); + +/** + * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core + * + * @dai: Array of DAIs to unregister + * @count: Number of DAIs + */ +void snd_soc_unregister_dais(struct device *dev, size_t count) +{ + int i; + + for (i = 0; i < count; i++) + snd_soc_unregister_dai(dev); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_dais); + +/** + * snd_soc_register_platform - Register a platform with the ASoC core + * + * @platform: platform to register + */ +int snd_soc_register_platform(struct device *dev, + struct snd_soc_platform_driver *platform_drv) +{ + struct snd_soc_platform *platform; + + dev_dbg(dev, "platform register %s\n", dev_name(dev)); + + platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL); + if (platform == NULL) + return -ENOMEM; + + /* create platform component name */ + platform->name = fmt_single_name(dev, &platform->id); + if (platform->name == NULL) { + kfree(platform); + return -ENOMEM; + } + + platform->dev = dev; + platform->driver = platform_drv; + platform->dapm.dev = dev; + platform->dapm.platform = platform; + platform->dapm.stream_event = platform_drv->stream_event; + mutex_init(&platform->mutex); + + mutex_lock(&client_mutex); + list_add(&platform->list, &platform_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + pr_debug("Registered platform '%s'\n", platform->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_register_platform); + +/** + * snd_soc_unregister_platform - Unregister a platform from the ASoC core + * + * @platform: platform to unregister + */ +void snd_soc_unregister_platform(struct device *dev) +{ + struct snd_soc_platform *platform; + + list_for_each_entry(platform, &platform_list, list) { + if (dev == platform->dev) + goto found; + } + return; + +found: + mutex_lock(&client_mutex); + list_del(&platform->list); + mutex_unlock(&client_mutex); + + pr_debug("Unregistered platform '%s'\n", platform->name); + kfree(platform->name); + kfree(platform); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); + +static u64 codec_format_map[] = { + SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE, + SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE, + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE, + SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, + SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE, + SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, + SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, + SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE, + SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE, + SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE, + SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE, + SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE, + SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE, + SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE + | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, +}; + +/* Fix up the DAI formats for endianness: codecs don't actually see + * the endianness of the data but we're using the CPU format + * definitions which do need to include endianness so we ensure that + * codec DAIs always have both big and little endian variants set. + */ +static void fixup_codec_formats(struct snd_soc_pcm_stream *stream) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(codec_format_map); i++) + if (stream->formats & codec_format_map[i]) + stream->formats |= codec_format_map[i]; +} + +/** + * snd_soc_register_codec - Register a codec with the ASoC core + * + * @codec: codec to register + */ +int snd_soc_register_codec(struct device *dev, + const struct snd_soc_codec_driver *codec_drv, + struct snd_soc_dai_driver *dai_drv, + int num_dai) +{ + size_t reg_size; + struct snd_soc_codec *codec; + int ret, i; + + dev_dbg(dev, "codec register %s\n", dev_name(dev)); + + codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); + if (codec == NULL) + return -ENOMEM; + + /* create CODEC component name */ + codec->name = fmt_single_name(dev, &codec->id); + if (codec->name == NULL) { + kfree(codec); + return -ENOMEM; + } + + if (codec_drv->compress_type) + codec->compress_type = codec_drv->compress_type; + else + codec->compress_type = SND_SOC_FLAT_COMPRESSION; + + codec->write = codec_drv->write; + codec->read = codec_drv->read; + codec->volatile_register = codec_drv->volatile_register; + codec->readable_register = codec_drv->readable_register; + codec->writable_register = codec_drv->writable_register; + codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time; + codec->dapm.bias_level = SND_SOC_BIAS_OFF; + codec->dapm.dev = dev; + codec->dapm.codec = codec; + codec->dapm.seq_notifier = codec_drv->seq_notifier; + codec->dapm.stream_event = codec_drv->stream_event; + codec->dev = dev; + codec->driver = codec_drv; + codec->num_dai = num_dai; + mutex_init(&codec->mutex); + + /* allocate CODEC register cache */ + if (codec_drv->reg_cache_size && codec_drv->reg_word_size) { + reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; + codec->reg_size = reg_size; + /* it is necessary to make a copy of the default register cache + * because in the case of using a compression type that requires + * the default register cache to be marked as __devinitconst the + * kernel might have freed the array by the time we initialize + * the cache. + */ + if (codec_drv->reg_cache_default) { + codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default, + reg_size, GFP_KERNEL); + if (!codec->reg_def_copy) { + ret = -ENOMEM; + goto fail; + } + } + } + + if (codec_drv->reg_access_size && codec_drv->reg_access_default) { + if (!codec->volatile_register) + codec->volatile_register = snd_soc_default_volatile_register; + if (!codec->readable_register) + codec->readable_register = snd_soc_default_readable_register; + if (!codec->writable_register) + codec->writable_register = snd_soc_default_writable_register; + } + + for (i = 0; i < num_dai; i++) { + fixup_codec_formats(&dai_drv[i].playback); + fixup_codec_formats(&dai_drv[i].capture); + } + + /* register any DAIs */ + if (num_dai) { + ret = snd_soc_register_dais(dev, dai_drv, num_dai); + if (ret < 0) + goto fail; + } + + mutex_lock(&client_mutex); + list_add(&codec->list, &codec_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + pr_debug("Registered codec '%s'\n", codec->name); + return 0; + +fail: + kfree(codec->reg_def_copy); + codec->reg_def_copy = NULL; + kfree(codec->name); + kfree(codec); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_register_codec); + +/** + * snd_soc_unregister_codec - Unregister a codec from the ASoC core + * + * @codec: codec to unregister + */ +void snd_soc_unregister_codec(struct device *dev) +{ + struct snd_soc_codec *codec; + int i; + + list_for_each_entry(codec, &codec_list, list) { + if (dev == codec->dev) + goto found; + } + return; + +found: + if (codec->num_dai) + for (i = 0; i < codec->num_dai; i++) + snd_soc_unregister_dai(dev); + + mutex_lock(&client_mutex); + list_del(&codec->list); + mutex_unlock(&client_mutex); + + pr_debug("Unregistered codec '%s'\n", codec->name); + + snd_soc_cache_exit(codec); + kfree(codec->reg_def_copy); + kfree(codec->name); + kfree(codec); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); + +/* Retrieve a card's name from device tree */ +int snd_soc_of_parse_card_name(struct snd_soc_card *card, + const char *propname) +{ + struct device_node *np = card->dev->of_node; + int ret; + + ret = of_property_read_string_index(np, propname, 0, &card->name); + /* + * EINVAL means the property does not exist. This is fine providing + * card->name was previously set, which is checked later in + * snd_soc_register_card. + */ + if (ret < 0 && ret != -EINVAL) { + dev_err(card->dev, + "Property '%s' could not be read: %d\n", + propname, ret); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name); + +int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, + const char *propname) +{ + struct device_node *np = card->dev->of_node; + int num_routes; + struct snd_soc_dapm_route *routes; + int i, ret; + + num_routes = of_property_count_strings(np, propname); + if (num_routes < 0 || num_routes & 1) { + dev_err(card->dev, + "Property '%s' does not exist or its length is not even\n", + propname); + return -EINVAL; + } + num_routes /= 2; + if (!num_routes) { + dev_err(card->dev, + "Property '%s's length is zero\n", + propname); + return -EINVAL; + } + + routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes), + GFP_KERNEL); + if (!routes) { + dev_err(card->dev, + "Could not allocate DAPM route table\n"); + return -EINVAL; + } + + for (i = 0; i < num_routes; i++) { + ret = of_property_read_string_index(np, propname, + 2 * i, &routes[i].sink); + if (ret) { + dev_err(card->dev, + "Property '%s' index %d could not be read: %d\n", + propname, 2 * i, ret); + return -EINVAL; + } + ret = of_property_read_string_index(np, propname, + (2 * i) + 1, &routes[i].source); + if (ret) { + dev_err(card->dev, + "Property '%s' index %d could not be read: %d\n", + propname, (2 * i) + 1, ret); + return -EINVAL; + } + } + + card->num_dapm_routes = num_routes; + card->dapm_routes = routes; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing); + +static int __init snd_soc_init(void) +{ +#ifdef CONFIG_DEBUG_FS + snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); + if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { + pr_warn("ASoC: Failed to create debugfs directory\n"); + snd_soc_debugfs_root = NULL; + } + + if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, + &codec_list_fops)) + pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); + + if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, + &dai_list_fops)) + pr_warn("ASoC: Failed to create DAI list debugfs file\n"); + + if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, + &platform_list_fops)) + pr_warn("ASoC: Failed to create platform list debugfs file\n"); +#endif + + snd_soc_util_init(); + + return platform_driver_register(&soc_driver); +} +module_init(snd_soc_init); + +static void __exit snd_soc_exit(void) +{ + snd_soc_util_exit(); + +#ifdef CONFIG_DEBUG_FS + debugfs_remove_recursive(snd_soc_debugfs_root); +#endif + platform_driver_unregister(&soc_driver); +} +module_exit(snd_soc_exit); + +/* Module information */ +MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); +MODULE_DESCRIPTION("ALSA SoC Core"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:soc-audio"); |