diff options
| -rw-r--r-- | sound/soc/soc-core.c | 1920 |
1 files changed, 1920 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c new file mode 100644 index 00000000000..e841ad46c75 --- /dev/null +++ b/sound/soc/soc-core.c @@ -0,0 +1,1920 @@ +/* + * soc-core.c -- ALSA SoC Audio Layer + * + * Copyright 2005 Wolfson Microelectronics PLC. + * Author: Liam Girdwood + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.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. + * + * Revision history + * 12th Aug 2005 Initial version. + * 25th Oct 2005 Working Codec, Interface and Platform registration. + * + * 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/platform_device.h> +#include <sound/driver.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> + +/* debug */ +#define SOC_DEBUG 0 +#if SOC_DEBUG +#define dbg(format, arg...) printk(format, ## arg) +#else +#define dbg(format, arg...) +#endif +/* debug DAI capabilities matching */ +#define SOC_DEBUG_DAI 0 +#if SOC_DEBUG_DAI +#define dbgc(format, arg...) printk(format, ## arg) +#else +#define dbgc(format, arg...) +#endif + +static DEFINE_MUTEX(pcm_mutex); +static DEFINE_MUTEX(io_mutex); +static struct workqueue_struct *soc_workq; +static struct work_struct soc_stream_work; +static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq); + +/* supported sample rates */ +/* ATTENTION: these values depend on the definition in pcm.h! */ +static const unsigned int rates[] = { + 5512, 8000, 11025, 16000, 22050, 32000, 44100, + 48000, 64000, 88200, 96000, 176400, 192000 +}; + +/* + * 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)"); + +#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 = NULL; + codec->ac97->dev.release = soc_ac97_device_release; + + snprintf(codec->ac97->dev.bus_id, BUS_ID_SIZE, "%d-%d:%s", + codec->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 inline const char* get_dai_name(int type) +{ + switch(type) { + case SND_SOC_DAI_AC97: + return "AC97"; + case SND_SOC_DAI_I2S: + return "I2S"; + case SND_SOC_DAI_PCM: + return "PCM"; + } + return NULL; +} + +/* get rate format from rate */ +static inline int soc_get_rate_format(int rate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(rates); i++) { + if (rates[i] == rate) + return 1 << i; + } + return 0; +} + +/* gets the audio system mclk/sysclk for the given parameters */ +static unsigned inline int soc_get_mclk(struct snd_soc_pcm_runtime *rtd, + struct snd_soc_clock_info *info) +{ + struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_machine *machine = socdev->machine; + int i; + + /* find the matching machine config and get it's mclk for the given + * sample rate and hardware format */ + for(i = 0; i < machine->num_links; i++) { + if (machine->dai_link[i].cpu_dai == rtd->cpu_dai && + machine->dai_link[i].config_sysclk) + return machine->dai_link[i].config_sysclk(rtd, info); + } + return 0; +} + +/* changes a bitclk multiplier mask to a divider mask */ +static u16 soc_bfs_mult_to_div(u16 bfs, int rate, unsigned int mclk, + unsigned int pcmfmt, unsigned int chn) +{ + int i, j; + u16 bfs_ = 0; + int size = snd_pcm_format_physical_width(pcmfmt), min = 0; + + if (size <= 0) + return 0; + + /* the minimum bit clock that has enough bandwidth */ + min = size * rate * chn; + dbgc("mult --> div min bclk %d with mclk %d\n", min, mclk); + + for (i = 0; i < 16; i++) { + if ((bfs >> i) & 0x1) { + j = rate * SND_SOC_FSB_REAL(1<<i); + + if (j >= min) { + bfs_ |= SND_SOC_FSBD(mclk/j); + dbgc("mult --> div support mult %d\n", + SND_SOC_FSB_REAL(1<<i)); + } + } + } + + return bfs_; +} + +/* changes a bitclk divider mask to a multiplier mask */ +static u16 soc_bfs_div_to_mult(u16 bfs, int rate, unsigned int mclk, + unsigned int pcmfmt, unsigned int chn) +{ + int i, j; + u16 bfs_ = 0; + + int size = snd_pcm_format_physical_width(pcmfmt), min = 0; + + if (size <= 0) + return 0; + + /* the minimum bit clock that has enough bandwidth */ + min = size * rate * chn; + dbgc("div to mult min bclk %d with mclk %d\n", min, mclk); + + for (i = 0; i < 16; i++) { + if ((bfs >> i) & 0x1) { + j = mclk / (SND_SOC_FSBD_REAL(1<<i)); + if (j >= min) { + bfs_ |= SND_SOC_FSB(j/rate); + dbgc("div --> mult support div %d\n", + SND_SOC_FSBD_REAL(1<<i)); + } + } + } + + return bfs_; +} + +/* Matches codec DAI and SoC CPU DAI hardware parameters */ +static int soc_hw_match_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai_mode *codec_dai_mode = NULL; + struct snd_soc_dai_mode *cpu_dai_mode = NULL; + struct snd_soc_clock_info clk_info; + unsigned int fs, mclk, codec_bfs, cpu_bfs, rate = params_rate(params), + chn, j, k, cpu_bclk, codec_bclk, pcmrate; + u16 fmt = 0; + + dbg("asoc: match version %s\n", SND_SOC_VERSION); + clk_info.rate = rate; + pcmrate = soc_get_rate_format(rate); + + /* try and find a match from the codec and cpu DAI capabilities */ + for (j = 0; j < rtd->codec_dai->caps.num_modes; j++) { + for (k = 0; k < rtd->cpu_dai->caps.num_modes; k++) { + codec_dai_mode = &rtd->codec_dai->caps.mode[j]; + cpu_dai_mode = &rtd->cpu_dai->caps.mode[k]; + + if (!(codec_dai_mode->pcmrate & cpu_dai_mode->pcmrate & + pcmrate)) { + dbgc("asoc: DAI[%d:%d] failed to match rate\n", j, k); + continue; + } + + fmt = codec_dai_mode->fmt & cpu_dai_mode->fmt; + if (!(fmt & SND_SOC_DAIFMT_FORMAT_MASK)) { + dbgc("asoc: DAI[%d:%d] failed to match format\n", j, k); + continue; + } + + if (!(fmt & SND_SOC_DAIFMT_CLOCK_MASK)) { + dbgc("asoc: DAI[%d:%d] failed to match clock masters\n", + j, k); + continue; + } + + if (!(fmt & SND_SOC_DAIFMT_INV_MASK)) { + dbgc("asoc: DAI[%d:%d] failed to match invert\n", j, k); + continue; + } + + if (!(codec_dai_mode->pcmfmt & cpu_dai_mode->pcmfmt)) { + dbgc("asoc: DAI[%d:%d] failed to match pcm format\n", j, k); + continue; + } + + if (!(codec_dai_mode->pcmdir & cpu_dai_mode->pcmdir)) { + dbgc("asoc: DAI[%d:%d] failed to match direction\n", j, k); + continue; + } + + /* todo - still need to add tdm selection */ + rtd->cpu_dai->dai_runtime.fmt = + rtd->codec_dai->dai_runtime.fmt = + 1 << (ffs(fmt & SND_SOC_DAIFMT_FORMAT_MASK) -1) | + 1 << (ffs(fmt & SND_SOC_DAIFMT_CLOCK_MASK) - 1) | + 1 << (ffs(fmt & SND_SOC_DAIFMT_INV_MASK) - 1); + clk_info.bclk_master = + rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK; + + /* make sure the ratio between rate and master + * clock is acceptable*/ + fs = (cpu_dai_mode->fs & codec_dai_mode->fs); + if (fs == 0) { + dbgc("asoc: DAI[%d:%d] failed to match FS\n", j, k); + continue; + } + clk_info.fs = rtd->cpu_dai->dai_runtime.fs = + rtd->codec_dai->dai_runtime.fs = fs; + + /* calculate audio system clocking using slowest clocks possible*/ + mclk = soc_get_mclk(rtd, &clk_info); + if (mclk == 0) { + dbgc("asoc: DAI[%d:%d] configuration not clockable\n", j, k); + dbgc("asoc: rate %d fs %d master %x\n", rate, fs, + clk_info.bclk_master); + continue; + } + + /* calculate word size (per channel) and frame size */ + rtd->codec_dai->dai_runtime.pcmfmt = + rtd->cpu_dai->dai_runtime.pcmfmt = + 1 << params_format(params); + + chn = params_channels(params); + /* i2s always has left and right */ + if (params_channels(params) == 1 && + rtd->cpu_dai->dai_runtime.fmt & (SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_LEFT_J)) + chn <<= 1; + + /* Calculate bfs - the ratio between bitclock and the sample rate + * We must take into consideration the dividers and multipliers + * used in the codec and cpu DAI modes. We always choose the + * lowest possible clocks to reduce power. + */ + if (codec_dai_mode->flags & cpu_dai_mode->flags & + SND_SOC_DAI_BFS_DIV) { + /* cpu & codec bfs dividers */ + rtd->cpu_dai->dai_runtime.bfs = + rtd->codec_dai->dai_runtime.bfs = + 1 << (fls(codec_dai_mode->bfs & cpu_dai_mode->bfs) - 1); + } else if (codec_dai_mode->flags & SND_SOC_DAI_BFS_DIV) { + /* normalise bfs codec divider & cpu mult */ + codec_bfs = soc_bfs_div_to_mult(codec_dai_mode->bfs, rate, + mclk, rtd->codec_dai->dai_runtime.pcmfmt, chn); + rtd->cpu_dai->dai_runtime.bfs = + 1 << (ffs(codec_bfs & cpu_dai_mode->bfs) - 1); + cpu_bfs = soc_bfs_mult_to_div(cpu_dai_mode->bfs, rate, mclk, + rtd->codec_dai->dai_runtime.pcmfmt, chn); + rtd->codec_dai->dai_runtime.bfs = + 1 << (fls(codec_dai_mode->bfs & cpu_bfs) - 1); + } else if (cpu_dai_mode->flags & SND_SOC_DAI_BFS_DIV) { + /* normalise bfs codec mult & cpu divider */ + codec_bfs = soc_bfs_mult_to_div(codec_dai_mode->bfs, rate, + mclk, rtd->codec_dai->dai_runtime.pcmfmt, chn); + rtd->cpu_dai->dai_runtime.bfs = + 1 << (fls(codec_bfs & cpu_dai_mode->bfs) -1); + cpu_bfs = soc_bfs_div_to_mult(cpu_dai_mode->bfs, rate, mclk, + rtd->codec_dai->dai_runtime.pcmfmt, chn); + rtd->codec_dai->dai_runtime.bfs = + 1 << (ffs(codec_dai_mode->bfs & cpu_bfs) -1); + } else { + /* codec & cpu bfs rate multipliers */ + rtd->cpu_dai->dai_runtime.bfs = + rtd->codec_dai->dai_runtime.bfs = + 1 << (ffs(codec_dai_mode->bfs & cpu_dai_mode->bfs) -1); + } + + /* make sure the bit clock speed is acceptable */ + if (!rtd->cpu_dai->dai_runtime.bfs || + !rtd->codec_dai->dai_runtime.bfs) { + dbgc("asoc: DAI[%d:%d] failed to match BFS\n", j, k); + dbgc("asoc: cpu_dai %x codec %x\n", + rtd->cpu_dai->dai_runtime.bfs, + rtd->codec_dai->dai_runtime.bfs); + dbgc("asoc: mclk %d hwfmt %x\n", mclk, fmt); + continue; + } + + goto found; + } + } + printk(KERN_ERR "asoc: no matching DAI found between codec and CPU\n"); + return -EINVAL; + +found: + /* we have matching DAI's, so complete the runtime info */ + rtd->codec_dai->dai_runtime.pcmrate = + rtd->cpu_dai->dai_runtime.pcmrate = + soc_get_rate_format(rate); + + rtd->codec_dai->dai_runtime.priv = codec_dai_mode->priv; + rtd->cpu_dai->dai_runtime.priv = cpu_dai_mode->priv; + rtd->codec_dai->dai_runtime.flags = codec_dai_mode->flags; + rtd->cpu_dai->dai_runtime.flags = cpu_dai_mode->flags; + + /* for debug atm */ + dbg("asoc: DAI[%d:%d] Match OK\n", j, k); + if (rtd->codec_dai->dai_runtime.flags == SND_SOC_DAI_BFS_DIV) { + codec_bclk = (rtd->codec_dai->dai_runtime.fs * params_rate(params)) / + SND_SOC_FSBD_REAL(rtd->codec_dai->dai_runtime.bfs); + dbg("asoc: codec fs %d mclk %d bfs div %d bclk %d\n", + rtd->codec_dai->dai_runtime.fs, mclk, + SND_SOC_FSBD_REAL(rtd->codec_dai->dai_runtime.bfs), codec_bclk); + } else { + codec_bclk = params_rate(params) * + SND_SOC_FSB_REAL(rtd->codec_dai->dai_runtime.bfs); + dbg("asoc: codec fs %d mclk %d bfs mult %d bclk %d\n", + rtd->codec_dai->dai_runtime.fs, mclk, + SND_SOC_FSB_REAL(rtd->codec_dai->dai_runtime.bfs), codec_bclk); + } + if (rtd->cpu_dai->dai_runtime.flags == SND_SOC_DAI_BFS_DIV) { + cpu_bclk = (rtd->cpu_dai->dai_runtime.fs * params_rate(params)) / + SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs); + dbg("asoc: cpu fs %d mclk %d bfs div %d bclk %d\n", + rtd->cpu_dai->dai_runtime.fs, mclk, + SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs), cpu_bclk); + } else { + cpu_bclk = params_rate(params) * + SND_SOC_FSB_REAL(rtd->cpu_dai->dai_runtime.bfs); + dbg("asoc: cpu fs %d mclk %d bfs mult %d bclk %d\n", + rtd->cpu_dai->dai_runtime.fs, mclk, + SND_SOC_FSB_REAL(rtd->cpu_dai->dai_runtime.bfs), cpu_bclk); + } + + /* + * Check we have matching bitclocks. If we don't then it means the + * sysclock returned by either the codec or cpu DAI (selected by the + * machine sysclock function) is wrong compared with the supported DAI + * modes for the codec or cpu DAI. + */ + if (cpu_bclk != codec_bclk){ + printk(KERN_ERR + "asoc: codec and cpu bitclocks differ, audio may be wrong speed\n" + ); + printk(KERN_ERR "asoc: codec %d != cpu %d\n", codec_bclk, cpu_bclk); + } + + switch(rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + dbg("asoc: DAI codec BCLK master, LRC master\n"); + break; + case SND_SOC_DAIFMT_CBS_CFM: + dbg("asoc: DAI codec BCLK slave, LRC master\n"); + break; + case SND_SOC_DAIFMT_CBM_CFS: + dbg("asoc: DAI codec BCLK master, LRC slave\n"); + break; + case SND_SOC_DAIFMT_CBS_CFS: + dbg("asoc: DAI codec BCLK slave, LRC slave\n"); + break; + } + dbg("asoc: mode %x, invert %x\n", + rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_FORMAT_MASK, + rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_INV_MASK); + dbg("asoc: audio rate %d chn %d fmt %x\n", params_rate(params), + params_channels(params), params_format(params)); + + return 0; +} + +static inline u32 get_rates(struct snd_soc_dai_mode *modes, int nmodes) +{ + int i; + u32 rates = 0; + + for(i = 0; i < nmodes; i++) + rates |= modes[i].pcmrate; + + return rates; +} + +static inline u64 get_formats(struct snd_soc_dai_mode *modes, int nmodes) +{ + int i; + u64 formats = 0; + + for(i = 0; i < nmodes; i++) + formats |= modes[i].pcmfmt; + + return formats; +} + +/* + * 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_soc_device *socdev = rtd->socdev; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec_dai *codec_dai = rtd->codec_dai; + struct snd_soc_cpu_dai *cpu_dai = rtd->cpu_dai; + int ret = 0; + + mutex_lock(&pcm_mutex); + + /* startup the audio subsystem */ + if (rtd->cpu_dai->ops.startup) { + ret = rtd->cpu_dai->ops.startup(substream); + if (ret < 0) { + printk(KERN_ERR "asoc: can't open interface %s\n", + rtd->cpu_dai->name); + goto out; + } + } + + if (platform->pcm_ops->open) { + ret = platform->pcm_ops->open(substream); + if (ret < 0) { + printk(KERN_ERR "asoc: can't open platform %s\n", platform->name); + goto platform_err; + } + } + + if (machine->ops && machine->ops->startup) { + ret = machine->ops->startup(substream); + if (ret < 0) { + printk(KERN_ERR "asoc: %s startup failed\n", machine->name); + goto machine_err; + } + } + + if (rtd->codec_dai->ops.startup) { + ret = rtd->codec_dai->ops.startup(substream); + if (ret < 0) { + printk(KERN_ERR "asoc: can't open codec %s\n", + rtd->codec_dai->name); + goto codec_dai_err; + } + } + + /* create runtime params from DMA, codec and cpu DAI */ + if (runtime->hw.rates) + runtime->hw.rates &= + get_rates(codec_dai->caps.mode, codec_dai->caps.num_modes) & + get_rates(cpu_dai->caps.mode, cpu_dai->caps.num_modes); + else + runtime->hw.rates = + get_rates(codec_dai->caps.mode, codec_dai->caps.num_modes) & + get_rates(cpu_dai->caps.mode, cpu_dai->caps.num_modes); + if (runtime->hw.formats) + runtime->hw.formats &= + get_formats(codec_dai->caps.mode, codec_dai->caps.num_modes) & + get_formats(cpu_dai->caps.mode, cpu_dai->caps.num_modes); + else + runtime->hw.formats = + get_formats(codec_dai->caps.mode, codec_dai->caps.num_modes) & + get_formats(cpu_dai->caps.mode, cpu_dai->caps.num_modes); + + /* Check that the codec and cpu DAI's are compatible */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + runtime->hw.rate_min = + max(rtd->codec_dai->playback.rate_min, + rtd->cpu_dai->playback.rate_min); + runtime->hw.rate_max = + min(rtd->codec_dai->playback.rate_max, + rtd->cpu_dai->playback.rate_max); + runtime->hw.channels_min = + max(rtd->codec_dai->playback.channels_min, + rtd->cpu_dai->playback.channels_min); + runtime->hw.channels_max = + min(rtd->codec_dai->playback.channels_max, + rtd->cpu_dai->playback.channels_max); + } else { + runtime->hw.rate_min = + max(rtd->codec_dai->capture.rate_min, + rtd->cpu_dai->capture.rate_min); + runtime->hw.rate_max = + min(rtd->codec_dai->capture.rate_max, + rtd->cpu_dai->capture.rate_max); + runtime->hw.channels_min = + max(rtd->codec_dai->capture.channels_min, + rtd->cpu_dai->capture.channels_min); + runtime->hw.channels_max = + min(rtd->codec_dai->capture.channels_max, + rtd->cpu_dai->capture.channels_max); + } + + snd_pcm_limit_hw_rates(runtime); + if (!runtime->hw.rates) { + printk(KERN_ERR "asoc: %s <-> %s No matching rates\n", + rtd->codec_dai->name, rtd->cpu_dai->name); + goto codec_dai_err; + } + if (!runtime->hw.formats) { + printk(KERN_ERR "asoc: %s <-> %s No matching formats\n", + rtd->codec_dai->name, rtd->cpu_dai->name); + goto codec_dai_err; + } + if (!runtime->hw.channels_min || !runtime->hw.channels_max) { + printk(KERN_ERR "asoc: %s <-> %s No matching channels\n", + rtd->codec_dai->name, rtd->cpu_dai->name); + goto codec_dai_err; + } + + dbg("asoc: %s <-> %s info:\n", rtd->codec_dai->name, rtd->cpu_dai->name); + dbg("asoc: rate mask 0x%x \nasoc: min ch %d max ch %d\n + asoc: min rate %d max rate %d\n", + runtime->hw.rates, runtime->hw.channels_min, + runtime->hw.channels_max, runtime->hw.rate_min, runtime->hw.rate_max); + + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + rtd->cpu_dai->playback.active = rtd->codec_dai->playback.active = 1; + else + rtd->cpu_dai->capture.active = rtd->codec_dai->capture.active = 1; + rtd->cpu_dai->active = rtd->codec_dai->active = 1; + rtd->cpu_dai->runtime = runtime; + socdev->codec->active++; + mutex_unlock(&pcm_mutex); + return 0; + +codec_dai_err: + if (machine->ops && machine->ops->shutdown) + machine->ops->shutdown(substream); + +machine_err: + if (platform->pcm_ops->close) + platform->pcm_ops->close(substream); + +platform_err: + if (rtd->cpu_dai->ops.shutdown) + rtd->cpu_dai->ops.shutdown(substream); +out: + mutex_unlock(&pcm_mutex); + return ret; +} + +/* + * Power down the audio subsytem 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(void *data) +{ + struct snd_soc_device *socdev = data; + struct snd_soc_codec *codec = socdev->codec; + struct snd_soc_codec_dai *codec_dai; + int i; + + mutex_lock(&pcm_mutex); + for(i = 0; i < codec->num_dai; i++) { + codec_dai = &codec->dai[i]; + + dbg("pop wq checking: %s status: %s waiting: %s\n", + codec_dai->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(codec, codec_dai->playback.stream_name, + SND_SOC_DAPM_STREAM_STOP); + + /* power down the codec power domain if no longer active */ + if (codec->active == 0) { + dbg("pop wq D3 %s %s\n", codec->name, + codec_dai->playback.stream_name); + if (codec->dapm_event) + codec->dapm_event(codec, SNDRV_CTL_POWER_D3hot); + } + } + } + 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_device *socdev = rtd->socdev; + struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec *codec = socdev->codec; + + mutex_lock(&pcm_mutex); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + rtd->cpu_dai->playback.active = rtd->codec_dai->playback.active = 0; + else + rtd->cpu_dai->capture.active = rtd->codec_dai->capture.active = 0; + + if (rtd->codec_dai->playback.active == 0 && + rtd->codec_dai->capture.active == 0) { + rtd->cpu_dai->active = rtd->codec_dai->active = 0; + } + codec->active--; + + if (rtd->cpu_dai->ops.shutdown) + rtd->cpu_dai->ops.shutdown(substream); + + if (rtd->codec_dai->ops.shutdown) + rtd->codec_dai->ops.shutdown(substream); + + if (machine->ops && machine->ops->shutdown) + machine->ops->shutdown(substream); + + if (platform->pcm_ops->close) + platform->pcm_ops->close(substream); + rtd->cpu_dai->runtime = NULL; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + /* start delayed pop wq here for playback streams */ + rtd->codec_dai->pop_wait = 1; + queue_delayed_work(soc_workq, &soc_stream_work, + msecs_to_jiffies(pmdown_time)); + } else { + /* capture streams can be powered down now */ + snd_soc_dapm_stream_event(codec, rtd->codec_dai->capture.stream_name, + SND_SOC_DAPM_STREAM_STOP); + + if (codec->active == 0 && rtd->codec_dai->pop_wait == 0){ + if (codec->dapm_event) + codec->dapm_event(codec, SNDRV_CTL_POWER_D3hot); + } + } + + 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_device *socdev = rtd->socdev; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec *codec = socdev->codec; + int ret = 0; + + mutex_lock(&pcm_mutex); + if (platform->pcm_ops->prepare) { + ret = platform->pcm_ops->prepare(substream); + if (ret < 0) + goto out; + } + + if (rtd->codec_dai->ops.prepare) { + ret = rtd->codec_dai->ops.prepare(substream); + if (ret < 0) + goto out; + } + + if (rtd->cpu_dai->ops.prepare) + ret = rtd->cpu_dai->ops.prepare(substream); + + /* we only want to start a DAPM playback stream if we are not waiting + * on an existing one stopping */ + if (rtd->codec_dai->pop_wait) { + /* we are waiting for the delayed work to start */ + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + snd_soc_dapm_stream_event(codec, + rtd->codec_dai->capture.stream_name, + SND_SOC_DAPM_STREAM_START); + else { + rtd->codec_dai->pop_wait = 0; + cancel_delayed_work(&soc_stream_work); + if (rtd->codec_dai->digital_mute) + rtd->codec_dai->digital_mute(codec, rtd->codec_dai, 0); + } + } else { + /* no delayed work - do we need to power up codec */ + if (codec->dapm_state != SNDRV_CTL_POWER_D0) { + + if (codec->dapm_event) + codec->dapm_event(codec, SNDRV_CTL_POWER_D1); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_dapm_stream_event(codec, + rtd->codec_dai->playback.stream_name, + SND_SOC_DAPM_STREAM_START); + else + snd_soc_dapm_stream_event(codec, + rtd->codec_dai->capture.stream_name, + SND_SOC_DAPM_STREAM_START); + + if (codec->dapm_event) + codec->dapm_event(codec, SNDRV_CTL_POWER_D0); + if (rtd->codec_dai->digital_mute) + rtd->codec_dai->digital_mute(codec, rtd->codec_dai, 0); + + } else { + /* codec already powered - power on widgets */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_dapm_stream_event(codec, + rtd->codec_dai->playback.stream_name, + SND_SOC_DAPM_STREAM_START); + else + snd_soc_dapm_stream_event(codec, + rtd->codec_dai->capture.stream_name, + SND_SOC_DAPM_STREAM_START); + if (rtd->codec_dai->digital_mute) + rtd->codec_dai->digital_mute(codec, rtd->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_device *socdev = rtd->socdev; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_machine *machine = socdev->machine; + int ret = 0; + + mutex_lock(&pcm_mutex); + + /* we don't need to match any AC97 params */ + if (rtd->cpu_dai->type != SND_SOC_DAI_AC97) { + ret = soc_hw_match_params(substream, params); + if (ret < 0) + goto out; + } else { + struct snd_soc_clock_info clk_info; + clk_info.rate = params_rate(params); + ret = soc_get_mclk(rtd, &clk_info); + if (ret < 0) + goto out; + } + + if (rtd->codec_dai->ops.hw_params) { + ret = rtd->codec_dai->ops.hw_params(substream, params); + if (ret < 0) { + printk(KERN_ERR "asoc: can't set codec %s hw params\n", + rtd->codec_dai->name); + goto out; + } + } + + if (rtd->cpu_dai->ops.hw_params) { + ret = rtd->cpu_dai->ops.hw_params(substream, params); + if (ret < 0) { + printk(KERN_ERR "asoc: can't set interface %s hw params\n", + rtd->cpu_dai->name); + goto interface_err; + } + } + + if (platform->pcm_ops->hw_params) { + ret = platform->pcm_ops->hw_params(substream, params); + if (ret < 0) { + printk(KERN_ERR "asoc: can't set platform %s hw params\n", + platform->name); + goto platform_err; + } + } + + if (machine->ops && machine->ops->hw_params) { + ret = machine->ops->hw_params(substream, params); + if (ret < 0) { + printk(KERN_ERR "asoc: machine hw_params failed\n"); + goto machine_err; + } + } + +out: + mutex_unlock(&pcm_mutex); + return ret; + +machine_err: + if (platform->pcm_ops->hw_free) + platform->pcm_ops->hw_free(substream); + +platform_err: + if (rtd->cpu_dai->ops.hw_free) + rtd->cpu_dai->ops.hw_free(substream); + +interface_err: + if (rtd->codec_dai->ops.hw_free) + rtd->codec_dai->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_device *socdev = rtd->socdev; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec *codec = socdev->codec; + struct snd_soc_machine *machine = socdev->machine; + + mutex_lock(&pcm_mutex); + + /* apply codec digital mute */ + if (!codec->active && rtd->codec_dai->digital_mute) + rtd->codec_dai->digital_mute(codec, rtd->codec_dai, 1); + + /* free any machine hw params */ + if (machine->ops && machine->ops->hw_free) + machine->ops->hw_free(substream); + + /* free any DMA resources */ + if (platform->pcm_ops->hw_free) + platform->pcm_ops->hw_free(substream); + + /* now free hw params for the DAI's */ + if (rtd->codec_dai->ops.hw_free) + rtd->codec_dai->ops.hw_free(substream); + + if (rtd->cpu_dai->ops.hw_free) + rtd->cpu_dai->ops.hw_free(substream); + + 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_device *socdev = rtd->socdev; + struct snd_soc_platform *platform = socdev->platform; + int ret; + + if (rtd->codec_dai->ops.trigger) { + ret = rtd->codec_dai->ops.trigger(substream, cmd); + if (ret < 0) + return ret; + } + + if (platform->pcm_ops->trigger) { + ret = platform->pcm_ops->trigger(substream, cmd); + if (ret < 0) + return ret; + } + + if (rtd->cpu_dai->ops.trigger) { + ret = rtd->cpu_dai->ops.trigger(substream, cmd); + if (ret < 0) + return ret; + } + return 0; +} + +/* 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, +}; + +#ifdef CONFIG_PM +/* powers down audio subsystem for suspend */ +static int soc_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec_device *codec_dev = socdev->codec_dev; + struct snd_soc_codec *codec = socdev->codec; + int i; + + /* mute any active DAC's */ + for(i = 0; i < machine->num_links; i++) { + struct snd_soc_codec_dai *dai = machine->dai_link[i].codec_dai; + if (dai->digital_mute && dai->playback.active) + dai->digital_mute(codec, dai, 1); + } + + if (machine->suspend_pre) + machine->suspend_pre(pdev, state); + + for(i = 0; i < machine->num_links; i++) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->suspend && cpu_dai->type != SND_SOC_DAI_AC97) + cpu_dai->suspend(pdev, cpu_dai); + if (platform->suspend) + platform->suspend(pdev, cpu_dai); + } + + /* close any waiting streams and save state */ + flush_workqueue(soc_workq); + codec->suspend_dapm_state = codec->dapm_state; + + for(i = 0; i < codec->num_dai; i++) { + char *stream = codec->dai[i].playback.stream_name; + if (stream != NULL) + snd_soc_dapm_stream_event(codec, stream, + SND_SOC_DAPM_STREAM_SUSPEND); + stream = codec->dai[i].capture.stream_name; + if (stream != NULL) + snd_soc_dapm_stream_event(codec, stream, + SND_SOC_DAPM_STREAM_SUSPEND); + } + + if (codec_dev->suspend) + codec_dev->suspend(pdev, state); + + for(i = 0; i < machine->num_links; i++) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->suspend && cpu_dai->type == SND_SOC_DAI_AC97) + cpu_dai->suspend(pdev, cpu_dai); + } + + if (machine->suspend_post) + machine->suspend_post(pdev, state); + + return 0; +} + +/* powers up audio subsystem after a suspend */ +static int soc_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec_device *codec_dev = socdev->codec_dev; + struct snd_soc_codec *codec = socdev->codec; + int i; + + if (machine->resume_pre) + machine->resume_pre(pdev); + + for(i = 0; i < machine->num_links; i++) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->resume && cpu_dai->type == SND_SOC_DAI_AC97) + cpu_dai->resume(pdev, cpu_dai); + } + + if (codec_dev->resume) + codec_dev->resume(pdev); + + for(i = 0; i < codec->num_dai; i++) { + char* stream = codec->dai[i].playback.stream_name; + if (stream != NULL) + snd_soc_dapm_stream_event(codec, stream, + SND_SOC_DAPM_STREAM_RESUME); + stream = codec->dai[i].capture.stream_name; + if (stream != NULL) + snd_soc_dapm_stream_event(codec, stream, + SND_SOC_DAPM_STREAM_RESUME); + } + + /* unmute any active DAC's */ + for(i = 0; i < machine->num_links; i++) { + struct snd_soc_codec_dai *dai = machine->dai_link[i].codec_dai; + if (dai->digital_mute && dai->playback.active) + dai->digital_mute(codec, dai, 0); + } + + for(i = 0; i < machine->num_links; i++) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->resume && cpu_dai->type != SND_SOC_DAI_AC97) + cpu_dai->resume(pdev, cpu_dai); + if (platform->resume) + platform->resume(pdev, cpu_dai); + } + + if (machine->resume_post) + machine->resume_post(pdev); + + return 0; +} + +#else +#define soc_suspend NULL +#define soc_resume NULL +#endif + +/* probes a new socdev */ +static int soc_probe(struct platform_device *pdev) +{ + int ret = 0, i; + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec_device *codec_dev = socdev->codec_dev; + + if (machine->probe) { + ret = machine->probe(pdev); + if(ret < 0) + return ret; + } + + for (i = 0; i < machine->num_links; i++) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->probe) { + ret = cpu_dai->probe(pdev); + if(ret < 0) + goto cpu_dai_err; + } + } + + if (codec_dev->probe) { + ret = codec_dev->probe(pdev); + if(ret < 0) + goto cpu_dai_err; + } + + if (platform->probe) { + ret = platform->probe(pdev); + if(ret < 0) + goto platform_err; + } + + /* DAPM stream work */ + soc_workq = create_workqueue("kdapm"); + if (soc_workq == NULL) + goto work_err; + INIT_WORK(&soc_stream_work, close_delayed_work, socdev); + return 0; + +work_err: + if (platform->remove) + platform->remove(pdev); + +platform_err: + if (codec_dev->remove) + codec_dev->remove(pdev); + +cpu_dai_err: + for (i--; i > 0; i--) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->remove) + cpu_dai->remove(pdev); + } + + if (machine->remove) + machine->remove(pdev); + + return ret; +} + +/* removes a socdev */ +static int soc_remove(struct platform_device *pdev) +{ + int i; + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_codec_device *codec_dev = socdev->codec_dev; + + if (soc_workq) + destroy_workqueue(soc_workq); + + if (platform->remove) + platform->remove(pdev); + + if (codec_dev->remove) + codec_dev->remove(pdev); + + for (i = 0; i < machine->num_links; i++) { + struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai; + if (cpu_dai->remove) + cpu_dai->remove(pdev); + } + + if (machine->remove) + machine->remove(pdev); + + return 0; +} + +/* ASoC platform driver */ +static struct platform_driver soc_driver = { + .driver = { + .name = "soc-audio", + }, + .probe = soc_probe, + .remove = soc_remove, + .suspend = soc_suspend, + .resume = soc_resume, +}; + +/* create a new pcm */ +static int soc_new_pcm(struct snd_soc_device *socdev, + struct snd_soc_dai_link *dai_link, int num) +{ + struct snd_soc_codec *codec = socdev->codec; + struct snd_soc_codec_dai *codec_dai = dai_link->codec_dai; + struct snd_soc_cpu_dai *cpu_dai = dai_link->cpu_dai; + struct snd_soc_pcm_runtime *rtd; + struct snd_pcm *pcm; + char new_name[64]; + int ret = 0, playback = 0, capture = 0; + + rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL); + if (rtd == NULL) + return -ENOMEM; + rtd->cpu_dai = cpu_dai; + rtd->codec_dai = codec_dai; + rtd->socdev = socdev; + + /* check client and interface hw capabilities */ + sprintf(new_name, "%s %s-%s-%d",dai_link->stream_name, codec_dai->name, + get_dai_name(cpu_dai->type), num); + + if (codec_dai->playback.channels_min) + playback = 1; + if (codec_dai->capture.channels_min) + capture = 1; + + ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback, + capture, &pcm); + if (ret < 0) { + printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name); + kfree(rtd); + return ret; + } + + pcm->private_data = rtd; + soc_pcm_ops.mmap = socdev->platform->pcm_ops->mmap; + soc_pcm_ops.pointer = socdev->platform->pcm_ops->pointer; + soc_pcm_ops.ioctl = socdev->platform->pcm_ops->ioctl; + soc_pcm_ops.copy = socdev->platform->pcm_ops->copy; + soc_pcm_ops.silence = socdev->platform->pcm_ops->silence; + soc_pcm_ops.ack = socdev->platform->pcm_ops->ack; + soc_pcm_ops.page = socdev->platform->pcm_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 = socdev->platform->pcm_new(codec->card, codec_dai, pcm); + if (ret < 0) { + printk(KERN_ERR "asoc: platform pcm constructor failed\n"); + kfree(rtd); + return ret; + } + + pcm->private_free = socdev->platform->pcm_free; + printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name, + cpu_dai->name); + return ret; +} + +/* codec register dump */ +static ssize_t codec_reg_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct snd_soc_device *devdata = dev_get_drvdata(dev); + struct snd_soc_codec *codec = devdata->codec; + int i, step = 1, count = 0; + + if (!codec->reg_cache_size) + return 0; + + if (codec->reg_cache_step) + step = codec->reg_cache_step; + + count += sprintf(buf, "%s registers\n", codec->name); + for(i = 0; i < codec->reg_cache_size; i += step) + count += sprintf(buf + count, "%2x: %4x\n", i, codec->read(codec, i)); + + return count; +} +static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); + +/** + * 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; + 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); + kfree(codec->ac97->bus); + kfree(codec->ac97); + codec->ac97 = NULL; + mutex_unlock(&codec->mutex); +} +EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec); + +/** + * 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 short mask, unsigned short value) +{ + int change; + unsigned short old, new; + + mutex_lock(&io_mutex); + old = snd_soc_read(codec, reg); + new = (old & ~mask) | value; + change = old != new; + if (change) + snd_soc_write(codec, reg, new); + + mutex_unlock(&io_mutex); + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_update_bits); + +/** + * 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 short mask, unsigned short value) +{ + int change; + unsigned short old, new; + + mutex_lock(&io_mutex); + old = snd_soc_read(codec, reg); + new = (old & ~mask) | value; + change = old != new; + mutex_unlock(&io_mutex); + + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_test_bits); + +/** + * snd_soc_get_rate - get int sample rate + * @hwpcmrate: the hardware pcm rate + * + * Returns the audio rate integaer value, else 0. + */ +int snd_soc_get_rate(int hwpcmrate) +{ + int rate = ffs(hwpcmrate) - 1; + + if (rate > ARRAY_SIZE(rates)) + return 0; + return rates[rate]; +} +EXPORT_SYMBOL_GPL(snd_soc_get_rate); + +/** + * snd_soc_new_pcms - create new sound card and pcms + * @socdev: the SoC audio device + * + * Create a new sound card based upon the codec and interface pcms. + * + * Returns 0 for success, else error. + */ +int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char * xid) +{ + struct snd_soc_codec *codec = socdev->codec; + struct snd_soc_machine *machine = socdev->machine; + int ret = 0, i; + + mutex_lock(&codec->mutex); + + /* register a sound card */ + codec->card = snd_card_new(idx, xid, codec->owner, 0); + if (!codec->card) { + printk(KERN_ERR "asoc: can't create sound card for codec %s\n", + codec->name); + mutex_unlock(&codec->mutex); + return -ENODEV; + } + + codec->card->dev = socdev->dev; + codec->card->private_data = codec; + strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver)); + + /* create the pcms */ + for(i = 0; i < machine->num_links; i++) { + ret = soc_new_pcm(socdev, &machine->dai_link[i], i); + if (ret < 0) { + printk(KERN_ERR "asoc: can't create pcm %s\n", + machine->dai_link[i].stream_name); + mutex_unlock(&codec->mutex); + return ret; + } + } + + mutex_unlock(&codec->mutex); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_new_pcms); + +/** + * snd_soc_register_card - register sound card + * @socdev: the SoC audio device + * + * Register a SoC sound card. Also registers an AC97 device if the + * codec is AC97 for ad hoc devices. + * + * Returns 0 for success, else error. + */ +int snd_soc_register_card(struct snd_soc_device *socdev) +{ + struct snd_soc_codec *codec = socdev->codec; + struct snd_soc_machine *machine = socdev->machine; + int ret = 0, i, ac97 = 0; + + mutex_lock(&codec->mutex); + for(i = 0; i < machine->num_links; i++) { + if (socdev->machine->dai_link[i].init) + socdev->machine->dai_link[i].init(codec); + if (socdev->machine->dai_link[i].cpu_dai->type == SND_SOC_DAI_AC97) + ac97 = 1; + } + snprintf(codec->card->shortname, sizeof(codec->card->shortname), + "%s", machine->name); + snprintf(codec->card->longname, sizeof(codec->card->longname), + "%s (%s)", machine->name, codec->name); + + ret = snd_card_register(codec->card); + if (ret < 0) { + printk(KERN_ERR "asoc: failed to register soundcard for codec %s\n", + codec->name); + mutex_unlock(&codec->mutex); + return ret; + } + +#ifdef CONFIG_SND_SOC_AC97_BUS + if (ac97) + soc_ac97_dev_register(codec); +#endif + + snd_soc_dapm_sys_add(socdev->dev); + device_create_file(socdev->dev, &dev_attr_codec_reg); + mutex_unlock(&codec->mutex); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_register_card); + +/** + * snd_soc_free_pcms - free sound card and pcms + * @socdev: the SoC audio device + * + * Frees sound card and pcms associated with the socdev. + * Also unregister the codec if it is an AC97 device. + */ +void snd_soc_free_pcms(struct snd_soc_device *socdev) +{ + struct snd_soc_codec *codec = socdev->codec; + + mutex_lock(&codec->mutex); +#ifdef CONFIG_SND_SOC_AC97_BUS + if (codec->ac97) + soc_ac97_dev_unregister(codec); +#endif + + if (codec->card) + snd_card_free(codec->card); + device_remove_file(socdev->dev, &dev_attr_codec_reg); + mutex_unlock(&codec->mutex); +} +EXPORT_SYMBOL_GPL(snd_soc_free_pcms); + +/** + * 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 + * @lnng_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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE; + template.index = 0; + + return snd_ctl_new1(&template, data); +} +EXPORT_SYMBOL_GPL(snd_soc_cnew); + +/** + * 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->mask; + + if (uinfo->value.enumerated.item > e->mask - 1) + uinfo->value.enumerated.item = e->mask - 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 + * @uinfo: 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 short val, bitmask; + + for (bitmask = 1; bitmask < e->mask; 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 + * @uinfo: 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 short val; + unsigned short mask, bitmask; + + for (bitmask = 1; bitmask < e->mask; bitmask <<= 1) + ; + if (ucontrol->value.enumerated.item[0] > e->mask - 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->mask - 1) + return -EINVAL; + val |= ucontrol->value.enumerated.item[1] << e->shift_r; + mask |= (bitmask - 1) << e->shift_r; + } + + return snd_soc_update_bits(codec, e->reg, mask, val); +} +EXPORT_SYMBOL_GPL(snd_soc_put_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->mask; + + if (uinfo->value.enumerated.item > e->mask - 1) + uinfo->value.enumerated.item = e->mask - 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 mask = kcontrol->private_value; + + uinfo->type = + mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = mask; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext); + +/** + * snd_soc_info_bool_ext - external single boolean mixer info callback + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a single boolean external mixer control. + * + * Returns 0 for success. + */ +int snd_soc_info_bool_ext(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_bool_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) +{ + int mask = (kcontrol->private_value >> 16) & 0xff; + int shift = (kcontrol->private_value >> 8) & 0x0f; + int rshift = (kcontrol->private_value >> 12) & 0x0f; + + uinfo->type = + mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = shift == rshift ? 1 : 2; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = mask; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw); + +/** + * snd_soc_get_volsw - single mixer get callback + * @kcontrol: mixer control + * @uinfo: 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 snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + int reg = kcontrol->private_value & 0xff; + int shift = (kcontrol->private_value >> 8) & 0x0f; + int rshift = (kcontrol->private_value >> 12) & 0x0f; + int mask = (kcontrol->private_value >> 16) & 0xff; + int invert = (kcontrol->private_value >> 24) & 0x01; + + 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] = + mask - ucontrol->value.integer.value[0]; + if (shift != rshift) + ucontrol->value.integer.value[1] = + mask - 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 + * @uinfo: 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 snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + int reg = kcontrol->private_value & 0xff; + int shift = (kcontrol->private_value >> 8) & 0x0f; + int rshift = (kcontrol->private_value >> 12) & 0x0f; + int mask = (kcontrol->private_value >> 16) & 0xff; + int invert = (kcontrol->private_value >> 24) & 0x01; + int err; + unsigned short val, val2, val_mask; + + val = (ucontrol->value.integer.value[0] & mask); + if (invert) + val = mask - val; + val_mask = mask << shift; + val = val << shift; + if (shift != rshift) { + val2 = (ucontrol->value.integer.value[1] & mask); + if (invert) + val2 = mask - val2; + val_mask |= mask << rshift; + val |= val2 << rshift; + } + err = snd_soc_update_bits(codec, reg, val_mask, val); + return err; +} +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) +{ + int mask = (kcontrol->private_value >> 12) & 0xff; + + uinfo->type = + mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = mask; + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r); + +/** + * snd_soc_get_volsw_2r - double mixer get callback + * @kcontrol: mixer control + * @uinfo: 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 snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + int reg = kcontrol->private_value & 0xff; + int reg2 = (kcontrol->private_value >> 24) & 0xff; + int shift = (kcontrol->private_value >> 8) & 0x0f; + int mask = (kcontrol->private_value >> 12) & 0xff; + int invert = (kcontrol->private_value >> 20) & 0x01; + + 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] = + mask - ucontrol->value.integer.value[0]; + ucontrol->value.integer.value[1] = + mask - 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 + * @uinfo: 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 snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + int reg = kcontrol->private_value & 0xff; + int reg2 = (kcontrol->private_value >> 24) & 0xff; + int shift = (kcontrol->private_value >> 8) & 0x0f; + int mask = (kcontrol->private_value >> 12) & 0xff; + int invert = (kcontrol->private_value >> 20) & 0x01; + int err; + unsigned short 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 = mask - val; + val2 = mask - val2; + } + + val = val << shift; + val2 = val2 << shift; + + if ((err = snd_soc_update_bits(codec, reg, val_mask, val)) < 0) + return err; + + err = snd_soc_update_bits(codec, reg2, val_mask, val2); + return err; +} +EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r); + +static int __devinit snd_soc_init(void) +{ + printk(KERN_INFO "ASoC version %s\n", SND_SOC_VERSION); + return platform_driver_register(&soc_driver); +} + +static void snd_soc_exit(void) +{ + platform_driver_unregister(&soc_driver); +} + +module_init(snd_soc_init); +module_exit(snd_soc_exit); + +/* Module information */ +MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); +MODULE_DESCRIPTION("ALSA SoC Core"); +MODULE_LICENSE("GPL"); |