/* * 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 * with code, comments and ideas from :- * Richard Purdie * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define NAME_SIZE 32 static DEFINE_MUTEX(pcm_mutex); static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq); #ifdef CONFIG_DEBUG_FS static struct dentry *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); static int snd_soc_register_card(struct snd_soc_card *card); static int snd_soc_unregister_card(struct snd_soc_card *card); static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num); /* * 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)"); /* * This function forces any delayed work to be queued and run. */ static int run_delayed_work(struct delayed_work *dwork) { int ret; /* cancel any work waiting to be queued. */ ret = cancel_delayed_work(dwork); /* if there was any work waiting then we run it now and * wait for it's completion */ if (ret) { schedule_delayed_work(dwork, 0); flush_scheduled_work(); } return ret; } /* codec register dump */ static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf) { int ret, i, step = 1, count = 0; if (!codec->driver->reg_cache_size) return 0; if (codec->driver->reg_cache_step) step = codec->driver->reg_cache_step; count += sprintf(buf, "%s registers\n", codec->name); for (i = 0; i < codec->driver->reg_cache_size; i += step) { if (codec->driver->readable_register && !codec->driver->readable_register(i)) continue; count += sprintf(buf + count, "%2x: ", i); if (count >= PAGE_SIZE - 1) break; if (codec->driver->display_register) { count += codec->driver->display_register(codec, buf + count, PAGE_SIZE - count, i); } else { /* If the read fails it's almost certainly due to * the register being volatile and the device being * powered off. */ ret = codec->driver->read(codec, i); if (ret >= 0) count += snprintf(buf + count, PAGE_SIZE - count, "%4x", ret); else count += snprintf(buf + count, PAGE_SIZE - count, "", ret); } if (count >= PAGE_SIZE - 1) break; count += snprintf(buf + count, PAGE_SIZE - count, "\n"); if (count >= PAGE_SIZE - 1) break; } /* Truncate count; min() would cause a warning */ if (count >= PAGE_SIZE) count = PAGE_SIZE - 1; return count; } static ssize_t codec_reg_show(struct device *dev, struct device_attribute *attr, char *buf) { struct snd_soc_pcm_runtime *rtd = container_of(dev, struct snd_soc_pcm_runtime, dev); return soc_codec_reg_show(rtd->codec, buf); } 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 = container_of(dev, struct snd_soc_pcm_runtime, 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 = container_of(dev, struct snd_soc_pcm_runtime, 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 int codec_reg_open_file(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } 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 = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!buf) return -ENOMEM; ret = soc_codec_reg_show(codec, buf); if (ret >= 0) ret = simple_read_from_buffer(user_buf, count, ppos, buf, 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]; int buf_size; char *start = buf; unsigned long reg, value; int step = 1; 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; if (codec->driver->reg_cache_step) step = codec->driver->reg_cache_step; while (*start == ' ') start++; reg = simple_strtoul(start, &start, 16); if ((reg >= codec->driver->reg_cache_size) || (reg % step)) return -EINVAL; while (*start == ' ') start++; if (strict_strtoul(start, 16, &value)) return -EINVAL; codec->driver->write(codec, reg, value); return buf_size; } static const struct file_operations codec_reg_fops = { .open = codec_reg_open_file, .read = codec_reg_read_file, .write = codec_reg_write_file, .llseek = default_llseek, }; static void soc_init_codec_debugfs(struct snd_soc_codec *codec) { codec->debugfs_codec_root = debugfs_create_dir(codec->name , debugfs_root); if (!codec->debugfs_codec_root) { printk(KERN_WARNING "ASoC: Failed to create codec debugfs directory\n"); return; } codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, codec->debugfs_codec_root, codec, &codec_reg_fops); if (!codec->debugfs_reg) printk(KERN_WARNING "ASoC: Failed to create codec register debugfs file\n"); codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, codec->debugfs_codec_root, &codec->dapm.pop_time); if (!codec->debugfs_pop_time) printk(KERN_WARNING "Failed to create pop time debugfs file\n"); codec->dapm.debugfs_dapm = debugfs_create_dir("dapm", codec->debugfs_codec_root); if (!codec->dapm.debugfs_dapm) printk(KERN_WARNING "Failed to create DAPM debugfs directory\n"); snd_soc_dapm_debugfs_init(&codec->dapm); } static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) { debugfs_remove_recursive(codec->debugfs_codec_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 */ }; #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) { } #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 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret; if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates || rtd->dai_link->symmetric_rates) { dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate); ret = snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_RATE, rtd->rate, rtd->rate); if (ret < 0) { dev_err(&rtd->dev, "Unable to apply rate symmetry constraint: %d\n", ret); return ret; } } return 0; } /* * Called by ALSA when a PCM substream is opened, the runtime->hw record is * then initialized and any private data can be allocated. This also calls * startup for the cpu DAI, platform, machine and codec DAI. */ static int soc_pcm_open(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver; int ret = 0; mutex_lock(&pcm_mutex); /* startup the audio subsystem */ if (cpu_dai->driver->ops->startup) { ret = cpu_dai->driver->ops->startup(substream, cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: can't open interface %s\n", cpu_dai->name); goto out; } } if (platform->driver->ops->open) { ret = platform->driver->ops->open(substream); if (ret < 0) { printk(KERN_ERR "asoc: can't open platform %s\n", platform->name); goto platform_err; } } if (codec_dai->driver->ops->startup) { ret = codec_dai->driver->ops->startup(substream, codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: can't open codec %s\n", codec_dai->name); goto codec_dai_err; } } if (rtd->dai_link->ops && rtd->dai_link->ops->startup) { ret = rtd->dai_link->ops->startup(substream); if (ret < 0) { printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name); goto machine_err; } } /* Check that the codec and cpu DAI's are compatible */ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { runtime->hw.rate_min = max(codec_dai_drv->playback.rate_min, cpu_dai_drv->playback.rate_min); runtime->hw.rate_max = min(codec_dai_drv->playback.rate_max, cpu_dai_drv->playback.rate_max); runtime->hw.channels_min = max(codec_dai_drv->playback.channels_min, cpu_dai_drv->playback.channels_min); runtime->hw.channels_max = min(codec_dai_drv->playback.channels_max, cpu_dai_drv->playback.channels_max); runtime->hw.formats = codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats; runtime->hw.rates = codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates; if (codec_dai_drv->playback.rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) runtime->hw.rates |= cpu_dai_drv->playback.rates; if (cpu_dai_drv->playback.rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) runtime->hw.rates |= codec_dai_drv->playback.rates; } else { runtime->hw.rate_min = max(codec_dai_drv->capture.rate_min, cpu_dai_drv->capture.rate_min); runtime->hw.rate_max = min(codec_dai_drv->capture.rate_max, cpu_dai_drv->capture.rate_max); runtime->hw.channels_min = max(codec_dai_drv->capture.channels_min, cpu_dai_drv->capture.channels_min); runtime->hw.channels_max = min(codec_dai_drv->capture.channels_max, cpu_dai_drv->capture.channels_max); runtime->hw.formats = codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats; runtime->hw.rates = codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates; if (codec_dai_drv->capture.rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) runtime->hw.rates |= cpu_dai_drv->capture.rates; if (cpu_dai_drv->capture.rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) runtime->hw.rates |= codec_dai_drv->capture.rates; } snd_pcm_limit_hw_rates(runtime); if (!runtime->hw.rates) { printk(KERN_ERR "asoc: %s <-> %s No matching rates\n", codec_dai->name, cpu_dai->name); goto config_err; } if (!runtime->hw.formats) { printk(KERN_ERR "asoc: %s <-> %s No matching formats\n", codec_dai->name, cpu_dai->name); goto config_err; } if (!runtime->hw.channels_min || !runtime->hw.channels_max) { printk(KERN_ERR "asoc: %s <-> %s No matching channels\n", codec_dai->name, cpu_dai->name); goto config_err; } /* Symmetry only applies if we've already got an active stream. */ if (cpu_dai->active || codec_dai->active) { ret = soc_pcm_apply_symmetry(substream); if (ret != 0) goto config_err; } pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name); pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates); pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min, runtime->hw.channels_max); pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min, runtime->hw.rate_max); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { cpu_dai->playback_active++; codec_dai->playback_active++; } else { cpu_dai->capture_active++; codec_dai->capture_active++; } cpu_dai->active++; codec_dai->active++; rtd->codec->active++; mutex_unlock(&pcm_mutex); return 0; config_err: if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) rtd->dai_link->ops->shutdown(substream); machine_err: if (codec_dai->driver->ops->shutdown) codec_dai->driver->ops->shutdown(substream, codec_dai); codec_dai_err: if (platform->driver->ops->close) platform->driver->ops->close(substream); platform_err: if (cpu_dai->driver->ops->shutdown) cpu_dai->driver->ops->shutdown(substream, cpu_dai); out: mutex_unlock(&pcm_mutex); return ret; } /* * Power down the audio subsystem pmdown_time msecs after close is called. * This is to ensure there are no pops or clicks in between any music tracks * due to DAPM power cycling. */ static void close_delayed_work(struct work_struct *work) { struct snd_soc_pcm_runtime *rtd = container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); struct snd_soc_dai *codec_dai = rtd->codec_dai; mutex_lock(&pcm_mutex); pr_debug("pop wq checking: %s status: %s waiting: %s\n", codec_dai->driver->playback.stream_name, codec_dai->playback_active ? "active" : "inactive", codec_dai->pop_wait ? "yes" : "no"); /* are we waiting on this codec DAI stream */ if (codec_dai->pop_wait == 1) { codec_dai->pop_wait = 0; snd_soc_dapm_stream_event(rtd, codec_dai->driver->playback.stream_name, SND_SOC_DAPM_STREAM_STOP); } mutex_unlock(&pcm_mutex); } /* * Called by ALSA when a PCM substream is closed. Private data can be * freed here. The cpu DAI, codec DAI, machine and platform are also * shutdown. */ static int soc_codec_close(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_codec *codec = rtd->codec; mutex_lock(&pcm_mutex); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { cpu_dai->playback_active--; codec_dai->playback_active--; } else { cpu_dai->capture_active--; codec_dai->capture_active--; } cpu_dai->active--; codec_dai->active--; codec->active--; /* Muting the DAC suppresses artifacts caused during digital * shutdown, for example from stopping clocks. */ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) snd_soc_dai_digital_mute(codec_dai, 1); if (cpu_dai->driver->ops->shutdown) cpu_dai->driver->ops->shutdown(substream, cpu_dai); if (codec_dai->driver->ops->shutdown) codec_dai->driver->ops->shutdown(substream, codec_dai); if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) rtd->dai_link->ops->shutdown(substream); if (platform->driver->ops->close) platform->driver->ops->close(substream); cpu_dai->runtime = NULL; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { /* start delayed pop wq here for playback streams */ codec_dai->pop_wait = 1; schedule_delayed_work(&rtd->delayed_work, msecs_to_jiffies(rtd->pmdown_time)); } else { /* capture streams can be powered down now */ snd_soc_dapm_stream_event(rtd, codec_dai->driver->capture.stream_name, SND_SOC_DAPM_STREAM_STOP); } mutex_unlock(&pcm_mutex); return 0; } /* * Called by ALSA when the PCM substream is prepared, can set format, sample * rate, etc. This function is non atomic and can be called multiple times, * it can refer to the runtime info. */ static int soc_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret = 0; mutex_lock(&pcm_mutex); if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) { ret = rtd->dai_link->ops->prepare(substream); if (ret < 0) { printk(KERN_ERR "asoc: machine prepare error\n"); goto out; } } if (platform->driver->ops->prepare) { ret = platform->driver->ops->prepare(substream); if (ret < 0) { printk(KERN_ERR "asoc: platform prepare error\n"); goto out; } } if (codec_dai->driver->ops->prepare) { ret = codec_dai->driver->ops->prepare(substream, codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: codec DAI prepare error\n"); goto out; } } if (cpu_dai->driver->ops->prepare) { ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: cpu DAI prepare error\n"); goto out; } } /* cancel any delayed stream shutdown that is pending */ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && codec_dai->pop_wait) { codec_dai->pop_wait = 0; cancel_delayed_work(&rtd->delayed_work); } if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) snd_soc_dapm_stream_event(rtd, codec_dai->driver->playback.stream_name, SND_SOC_DAPM_STREAM_START); else snd_soc_dapm_stream_event(rtd, codec_dai->driver->capture.stream_name, SND_SOC_DAPM_STREAM_START); snd_soc_dai_digital_mute(codec_dai, 0); out: mutex_unlock(&pcm_mutex); return ret; } /* * Called by ALSA when the hardware params are set by application. This * function can also be called multiple times and can allocate buffers * (using snd_pcm_lib_* ). It's non-atomic. */ static int soc_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret = 0; mutex_lock(&pcm_mutex); if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) { ret = rtd->dai_link->ops->hw_params(substream, params); if (ret < 0) { printk(KERN_ERR "asoc: machine hw_params failed\n"); goto out; } } if (codec_dai->driver->ops->hw_params) { ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: can't set codec %s hw params\n", codec_dai->name); goto codec_err; } } if (cpu_dai->driver->ops->hw_params) { ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: interface %s hw params failed\n", cpu_dai->name); goto interface_err; } } if (platform->driver->ops->hw_params) { ret = platform->driver->ops->hw_params(substream, params); if (ret < 0) { printk(KERN_ERR "asoc: platform %s hw params failed\n", platform->name); goto platform_err; } } rtd->rate = params_rate(params); out: mutex_unlock(&pcm_mutex); return ret; platform_err: if (cpu_dai->driver->ops->hw_free) cpu_dai->driver->ops->hw_free(substream, cpu_dai); interface_err: if (codec_dai->driver->ops->hw_free) codec_dai->driver->ops->hw_free(substream, codec_dai); codec_err: if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) rtd->dai_link->ops->hw_free(substream); mutex_unlock(&pcm_mutex); return ret; } /* * Free's resources allocated by hw_params, can be called multiple times */ static int soc_pcm_hw_free(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_codec *codec = rtd->codec; mutex_lock(&pcm_mutex); /* apply codec digital mute */ if (!codec->active) snd_soc_dai_digital_mute(codec_dai, 1); /* free any machine hw params */ if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) rtd->dai_link->ops->hw_free(substream); /* free any DMA resources */ if (platform->driver->ops->hw_free) platform->driver->ops->hw_free(substream); /* now free hw params for the DAI's */ if (codec_dai->driver->ops->hw_free) codec_dai->driver->ops->hw_free(substream, codec_dai); if (cpu_dai->driver->ops->hw_free) cpu_dai->driver->ops->hw_free(substream, cpu_dai); mutex_unlock(&pcm_mutex); return 0; } static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret; if (codec_dai->driver->ops->trigger) { ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai); if (ret < 0) return ret; } if (platform->driver->ops->trigger) { ret = platform->driver->ops->trigger(substream, cmd); if (ret < 0) return ret; } if (cpu_dai->driver->ops->trigger) { ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); if (ret < 0) return ret; } return 0; } /* * soc level wrapper for pointer callback * If cpu_dai, codec_dai, platform driver has the delay callback, than * the runtime->delay will be updated accordingly. */ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t offset = 0; snd_pcm_sframes_t delay = 0; if (platform->driver->ops->pointer) offset = platform->driver->ops->pointer(substream); if (cpu_dai->driver->ops->delay) delay += cpu_dai->driver->ops->delay(substream, cpu_dai); if (codec_dai->driver->ops->delay) delay += codec_dai->driver->ops->delay(substream, codec_dai); if (platform->driver->delay) delay += platform->driver->delay(substream, codec_dai); runtime->delay = delay; return offset; } /* ASoC PCM operations */ static struct snd_pcm_ops soc_pcm_ops = { .open = soc_pcm_open, .close = soc_codec_close, .hw_params = soc_pcm_hw_params, .hw_free = soc_pcm_hw_free, .prepare = soc_pcm_prepare, .trigger = soc_pcm_trigger, .pointer = soc_pcm_pointer, }; #ifdef CONFIG_PM /* powers down audio subsystem for suspend */ static int soc_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct snd_soc_card *card = platform_get_drvdata(pdev); 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 DAC's */ 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(pdev, PMSG_SUSPEND); 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++) { run_delayed_work(&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_driver *driver = card->rtd[i].codec_dai->driver; if (card->rtd[i].dai_link->ignore_suspend) continue; if (driver->playback.stream_name != NULL) snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name, SND_SOC_DAPM_STREAM_SUSPEND); if (driver->capture.stream_name != NULL) snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name, SND_SOC_DAPM_STREAM_SUSPEND); } /* suspend all CODECs */ for (i = 0; i < card->num_rtd; i++) { struct snd_soc_codec *codec = card->rtd[i].codec; /* 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: case SND_SOC_BIAS_OFF: codec->driver->suspend(codec, PMSG_SUSPEND); codec->suspended = 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(pdev, PMSG_SUSPEND); return 0; } /* 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 platform_device *pdev = to_platform_device(card->dev); int i; /* 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(pdev); /* 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); } for (i = 0; i < card->num_rtd; i++) { struct snd_soc_codec *codec = card->rtd[i].codec; /* 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; break; default: dev_dbg(codec->dev, "CODEC was on over suspend\n"); break; } } } for (i = 0; i < card->num_rtd; i++) { struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver; if (card->rtd[i].dai_link->ignore_suspend) continue; if (driver->playback.stream_name != NULL) snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name, SND_SOC_DAPM_STREAM_RESUME); if (driver->capture.stream_name != NULL) snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name, 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(pdev); 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 */ static int soc_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct snd_soc_card *card = platform_get_drvdata(pdev); int i; /* 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; if (cpu_dai->driver->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; } #else #define soc_suspend NULL #define soc_resume NULL #endif static 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; 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 (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) { if (!try_module_get(cpu_dai->dev->driver->owner)) return -ENODEV; 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 (!strcmp(codec->name, dai_link->codec_name)) { rtd->codec = codec; if (!try_module_get(codec->dev->driver->owner)) return -ENODEV; /* 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 already have the CODEC DAI for this link ? */ if (rtd->platform) { goto out; } /* no, then find CPU DAI from registered DAIs*/ list_for_each_entry(platform, &platform_list, list) { if (!strcmp(platform->name, dai_link->platform_name)) { if (!try_module_get(platform->dev->driver->owner)) return -ENODEV; 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_dai_link(struct snd_soc_card *card, int 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 err; /* unregister the rtd device */ if (rtd->dev_registered) { device_remove_file(&rtd->dev, &dev_attr_pmdown_time); device_unregister(&rtd->dev); rtd->dev_registered = 0; } /* remove the CODEC DAI */ if (codec_dai && codec_dai->probed) { if (codec_dai->driver->remove) { err = codec_dai->driver->remove(codec_dai); if (err < 0) printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name); } codec_dai->probed = 0; list_del(&codec_dai->card_list); } /* remove the platform */ if (platform && platform->probed) { if (platform->driver->remove) { err = platform->driver->remove(platform); if (err < 0) printk(KERN_ERR "asoc: failed to remove %s\n", platform->name); } platform->probed = 0; list_del(&platform->card_list); module_put(platform->dev->driver->owner); } /* remove the CODEC */ if (codec && codec->probed) { if (codec->driver->remove) { err = codec->driver->remove(codec); if (err < 0) printk(KERN_ERR "asoc: failed to remove %s\n", codec->name); } /* Make sure all DAPM widgets are freed */ snd_soc_dapm_free(&codec->dapm); soc_cleanup_codec_debugfs(codec); device_remove_file(&rtd->dev, &dev_attr_codec_reg); codec->probed = 0; list_del(&codec->card_list); module_put(codec->dev->driver->owner); } /* remove the cpu_dai */ if (cpu_dai && cpu_dai->probed) { if (cpu_dai->driver->remove) { err = cpu_dai->driver->remove(cpu_dai); if (err < 0) printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name); } cpu_dai->probed = 0; list_del(&cpu_dai->card_list); module_put(cpu_dai->dev->driver->owner); } } static void rtd_release(struct device *dev) {} static int soc_probe_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 = 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\n", card->name, num); /* config components */ codec_dai->codec = codec; codec->card = card; cpu_dai->platform = platform; rtd->card = card; rtd->dev.parent = card->dev; 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) { if (cpu_dai->driver->probe) { ret = cpu_dai->driver->probe(cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n", cpu_dai->name); return ret; } } cpu_dai->probed = 1; /* mark cpu_dai as probed and add to card cpu_dai list */ list_add(&cpu_dai->card_list, &card->dai_dev_list); } /* probe the CODEC */ if (!codec->probed) { if (codec->driver->probe) { ret = codec->driver->probe(codec); if (ret < 0) { printk(KERN_ERR "asoc: failed to probe CODEC %s\n", codec->name); return ret; } } soc_init_codec_debugfs(codec); /* mark codec as probed and add to card codec list */ codec->probed = 1; list_add(&codec->card_list, &card->codec_dev_list); } /* probe the platform */ if (!platform->probed) { if (platform->driver->probe) { ret = platform->driver->probe(platform); if (ret < 0) { printk(KERN_ERR "asoc: failed to probe platform %s\n", platform->name); return ret; } } /* mark platform as probed and add to card platform list */ platform->probed = 1; list_add(&platform->card_list, &card->platform_dev_list); } /* probe the CODEC DAI */ if (!codec_dai->probed) { if (codec_dai->driver->probe) { ret = codec_dai->driver->probe(codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n", codec_dai->name); return ret; } } /* mark cpu_dai as probed and add to card cpu_dai list */ codec_dai->probed = 1; list_add(&codec_dai->card_list, &card->dai_dev_list); } /* DAPM dai link stream work */ INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); /* now that all clients have probed, initialise the DAI link */ if (dai_link->init) { ret = dai_link->init(rtd); if (ret < 0) { printk(KERN_ERR "asoc: failed to init %s\n", dai_link->stream_name); return ret; } } /* Make sure all DAPM widgets are instantiated */ snd_soc_dapm_new_widgets(&codec->dapm); snd_soc_dapm_sync(&codec->dapm); /* register the rtd device */ rtd->dev.release = rtd_release; rtd->dev.init_name = dai_link->name; ret = device_register(&rtd->dev); if (ret < 0) { printk(KERN_ERR "asoc: failed to register DAI runtime device %d\n", ret); return ret; } rtd->dev_registered = 1; ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time); if (ret < 0) printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n"); /* add DAPM sysfs entries for this codec */ ret = snd_soc_dapm_sys_add(&rtd->dev); if (ret < 0) printk(KERN_WARNING "asoc: failed to add codec dapm sysfs entries\n"); /* add codec sysfs entries */ ret = device_create_file(&rtd->dev, &dev_attr_codec_reg); if (ret < 0) printk(KERN_WARNING "asoc: failed to add codec sysfs files\n"); /* create the pcm */ ret = soc_new_pcm(rtd, num); if (ret < 0) { printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name); 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) { printk(KERN_ERR "asoc: AC97 device register failed\n"); 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 void snd_soc_instantiate_card(struct snd_soc_card *card) { struct platform_device *pdev = to_platform_device(card->dev); int ret, i; mutex_lock(&card->mutex); 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; } /* 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) { printk(KERN_ERR "asoc: can't create sound card for card %s\n", card->name); mutex_unlock(&card->mutex); return; } card->snd_card->dev = card->dev; #ifdef CONFIG_PM /* deferred resume work */ INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); #endif /* initialise the sound card only once */ if (card->probe) { ret = card->probe(pdev); if (ret < 0) goto card_probe_error; } for (i = 0; i < card->num_links; i++) { ret = soc_probe_dai_link(card, i); if (ret < 0) { pr_err("asoc: failed to instantiate card %s: %d\n", card->name, ret); goto probe_dai_err; } } 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->name); ret = snd_card_register(card->snd_card); if (ret < 0) { printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name); goto probe_dai_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) { printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name); goto probe_dai_err; } } #endif card->instantiated = 1; mutex_unlock(&card->mutex); return; probe_dai_err: for (i = 0; i < card->num_links; i++) soc_remove_dai_link(card, i); card_probe_error: if (card->remove) card->remove(pdev); 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; /* Bodge while we unpick instantiation */ card->dev = &pdev->dev; INIT_LIST_HEAD(&card->dai_dev_list); INIT_LIST_HEAD(&card->codec_dev_list); INIT_LIST_HEAD(&card->platform_dev_list); ret = snd_soc_register_card(card); if (ret != 0) { dev_err(&pdev->dev, "Failed to register card\n"); return ret; } return 0; } /* removes a socdev */ static int soc_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); int i; if (card->instantiated) { /* make sure any delayed work runs */ for (i = 0; i < card->num_rtd; i++) { struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; run_delayed_work(&rtd->delayed_work); } /* remove and free each DAI */ for (i = 0; i < card->num_rtd; i++) soc_remove_dai_link(card, i); /* remove the card */ if (card->remove) card->remove(pdev); kfree(card->rtd); snd_card_free(card->snd_card); } snd_soc_unregister_card(card); return 0; } static int soc_poweroff(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct snd_soc_card *card = platform_get_drvdata(pdev); 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]; run_delayed_work(&rtd->delayed_work); } snd_soc_dapm_shutdown(card); return 0; } static const struct dev_pm_ops soc_pm_ops = { .suspend = soc_suspend, .resume = soc_resume, .poweroff = soc_poweroff, }; /* ASoC platform driver */ static struct platform_driver soc_driver = { .driver = { .name = "soc-audio", .owner = THIS_MODULE, .pm = &soc_pm_ops, }, .probe = soc_probe, .remove = soc_remove, }; /* create a new pcm */ static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) { struct snd_soc_codec *codec = rtd->codec; struct snd_soc_platform *platform = rtd->platform; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_pcm *pcm; char new_name[64]; int ret = 0, playback = 0, capture = 0; /* check client and interface hw capabilities */ snprintf(new_name, sizeof(new_name), "%s %s-%d", rtd->dai_link->stream_name, codec_dai->name, num); if (codec_dai->driver->playback.channels_min) playback = 1; if (codec_dai->driver->capture.channels_min) capture = 1; dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name); ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, capture, &pcm); if (ret < 0) { printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name); return ret; } rtd->pcm = pcm; pcm->private_data = rtd; soc_pcm_ops.mmap = platform->driver->ops->mmap; soc_pcm_ops.pointer = platform->driver->ops->pointer; soc_pcm_ops.ioctl = platform->driver->ops->ioctl; soc_pcm_ops.copy = platform->driver->ops->copy; soc_pcm_ops.silence = platform->driver->ops->silence; soc_pcm_ops.ack = platform->driver->ops->ack; soc_pcm_ops.page = platform->driver->ops->page; if (playback) snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops); if (capture) snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops); ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm); if (ret < 0) { printk(KERN_ERR "asoc: platform pcm constructor failed\n"); return ret; } pcm->private_free = platform->driver->pcm_free; printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name, cpu_dai->name); return ret; } /** * 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, int reg) { if (codec->driver->volatile_register) return codec->driver->volatile_register(reg); else return 0; } EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register); /** * 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->driver->read(codec, reg); dev_dbg(codec->dev, "read %x => %x\n", 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); return codec->driver->write(codec, reg, val); } EXPORT_SYMBOL_GPL(snd_soc_write); /** * 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 else 0. */ int snd_soc_update_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; if (change) snd_soc_write(codec, reg, new); 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 * * 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, char *long_name) { struct snd_kcontrol_new template; memcpy(&template, _template, sizeof(template)); if (long_name) template.name = long_name; template.index = 0; return snd_ctl_new1(&template, data); } EXPORT_SYMBOL_GPL(snd_soc_cnew); /** * snd_soc_add_controls - add an array of controls to a codec. * Convienience 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_controls(struct snd_soc_codec *codec, const struct snd_kcontrol_new *controls, int num_controls) { struct snd_card *card = codec->card->snd_card; 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, codec, NULL)); if (err < 0) { dev_err(codec->dev, "%s: Failed to add %s: %d\n", codec->name, control->name, err); return err; } } return 0; } EXPORT_SYMBOL_GPL(snd_soc_add_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. * * 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; unsigned int shift = mc->shift; unsigned int rshift = mc->rshift; 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 = shift == rshift ? 1 : 2; 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. * * 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 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 (shift != rshift) ucontrol->value.integer.value[1] = (snd_soc_read(codec, reg) >> rshift) & mask; if (invert) { ucontrol->value.integer.value[0] = max - ucontrol->value.integer.value[0]; if (shift != rshift) 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. * * 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 shift = mc->shift; unsigned int rshift = mc->rshift; int max = mc->max; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; unsigned int val, val2, val_mask; val = (ucontrol->value.integer.value[0] & mask); if (invert) val = max - val; val_mask = mask << shift; val = val << shift; if (shift != rshift) { val2 = (ucontrol->value.integer.value[1] & mask); if (invert) val2 = max - val2; val_mask |= mask << rshift; val |= val2 << rshift; } return snd_soc_update_bits_locked(codec, reg, val_mask, val); } EXPORT_SYMBOL_GPL(snd_soc_put_volsw); /** * snd_soc_info_volsw_2r - double mixer info callback * @kcontrol: mixer control * @uinfo: control element information * * Callback to provide information about a double mixer control that * spans 2 codec registers. * * Returns 0 for success. */ int snd_soc_info_volsw_2r(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 = 2; uinfo->value.integer.min = 0; uinfo->value.integer.max = platform_max; return 0; } EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r); /** * snd_soc_get_volsw_2r - double mixer get callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to get the value of a double mixer control that spans 2 registers. * * Returns 0 for success. */ int snd_soc_get_volsw_2r(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; 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; ucontrol->value.integer.value[1] = (snd_soc_read(codec, reg2) >> shift) & mask; if (invert) { ucontrol->value.integer.value[0] = max - ucontrol->value.integer.value[0]; ucontrol->value.integer.value[1] = max - ucontrol->value.integer.value[1]; } return 0; } EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r); /** * snd_soc_put_volsw_2r - double mixer set callback * @kcontrol: mixer control * @ucontrol: control element information * * Callback to set the value of a double mixer control that spans 2 registers. * * Returns 0 for success. */ int snd_soc_put_volsw_2r(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; int max = mc->max; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; int err; unsigned int val, val2, val_mask; val_mask = mask << shift; val = (ucontrol->value.integer.value[0] & mask); val2 = (ucontrol->value.integer.value[1] & mask); if (invert) { val = max - val; val2 = max - val2; } val = val << shift; val2 = val2 << shift; err = snd_soc_update_bits_locked(codec, reg, val_mask, val); if (err < 0) return err; err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2); return err; } EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r); /** * 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<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<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); /** * 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 return -EINVAL; } EXPORT_SYMBOL_GPL(snd_soc_dai_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 return -EINVAL; } EXPORT_SYMBOL_GPL(snd_soc_dai_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 && dai->driver->ops->set_fmt) return dai->driver->ops->set_fmt(dai, fmt); else return -EINVAL; } 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 * * Note that currently this is an internal only function: it will be * exposed to machine drivers after further backporting of ASoC v2 * registration APIs. */ static int snd_soc_register_card(struct snd_soc_card *card) { int i; if (!card->name || !card->dev) return -EINVAL; card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) * card->num_links, GFP_KERNEL); if (card->rtd == NULL) return -ENOMEM; for (i = 0; i < card->num_links; i++) card->rtd[i].dai_link = &card->dai_link[i]; INIT_LIST_HEAD(&card->list); card->instantiated = 0; mutex_init(&card->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; } /** * snd_soc_unregister_card - Unregister a card with the ASoC core * * @card: Card to unregister * * Note that currently this is an internal only function: it will be * exposed to machine drivers after further backporting of ASoC v2 * registration APIs. */ static int snd_soc_unregister_card(struct snd_soc_card *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; } /* * Simplify DAI link configuration by removing ".-1" from device names * and sanitizing names. */ static inline char *fmt_single_name(struct device *dev, int *id) { char *found, name[NAME_SIZE]; int id1, id2; if (dev_name(dev) == NULL) return NULL; strncpy(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); strncpy(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) { printk(KERN_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); } snd_soc_instantiate_cards(); 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; 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, struct snd_soc_codec_driver *codec_drv, struct snd_soc_dai_driver *dai_drv, int num_dai) { 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; } INIT_LIST_HEAD(&codec->dapm.widgets); INIT_LIST_HEAD(&codec->dapm.paths); codec->dapm.bias_level = SND_SOC_BIAS_OFF; codec->dapm.dev = dev; codec->dapm.codec = codec; /* allocate CODEC register cache */ if (codec_drv->reg_cache_size && codec_drv->reg_word_size) { if (codec_drv->reg_cache_default) codec->reg_cache = kmemdup(codec_drv->reg_cache_default, codec_drv->reg_cache_size * codec_drv->reg_word_size, GFP_KERNEL); else codec->reg_cache = kzalloc(codec_drv->reg_cache_size * codec_drv->reg_word_size, GFP_KERNEL); if (codec->reg_cache == NULL) { kfree(codec->name); kfree(codec); return -ENOMEM; } } codec->dev = dev; codec->driver = codec_drv; codec->num_dai = num_dai; mutex_init(&codec->mutex); 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 error; } 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; error: if (codec->reg_cache) kfree(codec->reg_cache); 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); if (codec->reg_cache) kfree(codec->reg_cache); kfree(codec->name); kfree(codec); } EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); static int __init snd_soc_init(void) { #ifdef CONFIG_DEBUG_FS debugfs_root = debugfs_create_dir("asoc", NULL); if (IS_ERR(debugfs_root) || !debugfs_root) { printk(KERN_WARNING "ASoC: Failed to create debugfs directory\n"); debugfs_root = NULL; } if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL, &codec_list_fops)) pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); if (!debugfs_create_file("dais", 0444, debugfs_root, NULL, &dai_list_fops)) pr_warn("ASoC: Failed to create DAI list debugfs file\n"); if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL, &platform_list_fops)) pr_warn("ASoC: Failed to create platform list debugfs file\n"); #endif return platform_driver_register(&soc_driver); } module_init(snd_soc_init); static void __exit snd_soc_exit(void) { #ifdef CONFIG_DEBUG_FS debugfs_remove_recursive(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");