diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/au1x/psc-i2s.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/soc/au1x/psc-i2s.c | 428 |
1 files changed, 0 insertions, 428 deletions
diff --git a/ANDROID_3.4.5/sound/soc/au1x/psc-i2s.c b/ANDROID_3.4.5/sound/soc/au1x/psc-i2s.c deleted file mode 100644 index 0607ba3d..00000000 --- a/ANDROID_3.4.5/sound/soc/au1x/psc-i2s.c +++ /dev/null @@ -1,428 +0,0 @@ -/* - * Au12x0/Au1550 PSC ALSA ASoC audio support. - * - * (c) 2007-2008 MSC Vertriebsges.m.b.H., - * Manuel Lauss <manuel.lauss@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Au1xxx-PSC I2S glue. - * - * NOTE: so far only PSC slave mode (bit- and frameclock) is supported. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/suspend.h> -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/initval.h> -#include <sound/soc.h> -#include <asm/mach-au1x00/au1000.h> -#include <asm/mach-au1x00/au1xxx_psc.h> - -#include "psc.h" - -/* supported I2S DAI hardware formats */ -#define AU1XPSC_I2S_DAIFMT \ - (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J | \ - SND_SOC_DAIFMT_NB_NF) - -/* supported I2S direction */ -#define AU1XPSC_I2S_DIR \ - (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) - -#define AU1XPSC_I2S_RATES \ - SNDRV_PCM_RATE_8000_192000 - -#define AU1XPSC_I2S_FMTS \ - (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE) - -#define I2SSTAT_BUSY(stype) \ - ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_I2SSTAT_TB : PSC_I2SSTAT_RB) -#define I2SPCR_START(stype) \ - ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_I2SPCR_TS : PSC_I2SPCR_RS) -#define I2SPCR_STOP(stype) \ - ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_I2SPCR_TP : PSC_I2SPCR_RP) -#define I2SPCR_CLRFIFO(stype) \ - ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_I2SPCR_TC : PSC_I2SPCR_RC) - - -static int au1xpsc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, - unsigned int fmt) -{ - struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(cpu_dai); - unsigned long ct; - int ret; - - ret = -EINVAL; - - ct = pscdata->cfg; - - ct &= ~(PSC_I2SCFG_XM | PSC_I2SCFG_MLJ); /* left-justified */ - switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { - case SND_SOC_DAIFMT_I2S: - ct |= PSC_I2SCFG_XM; /* enable I2S mode */ - break; - case SND_SOC_DAIFMT_MSB: - break; - case SND_SOC_DAIFMT_LSB: - ct |= PSC_I2SCFG_MLJ; /* LSB (right-) justified */ - break; - default: - goto out; - } - - ct &= ~(PSC_I2SCFG_BI | PSC_I2SCFG_WI); /* IB-IF */ - switch (fmt & SND_SOC_DAIFMT_INV_MASK) { - case SND_SOC_DAIFMT_NB_NF: - ct |= PSC_I2SCFG_BI | PSC_I2SCFG_WI; - break; - case SND_SOC_DAIFMT_NB_IF: - ct |= PSC_I2SCFG_BI; - break; - case SND_SOC_DAIFMT_IB_NF: - ct |= PSC_I2SCFG_WI; - break; - case SND_SOC_DAIFMT_IB_IF: - break; - default: - goto out; - } - - switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { - case SND_SOC_DAIFMT_CBM_CFM: /* CODEC master */ - ct |= PSC_I2SCFG_MS; /* PSC I2S slave mode */ - break; - case SND_SOC_DAIFMT_CBS_CFS: /* CODEC slave */ - ct &= ~PSC_I2SCFG_MS; /* PSC I2S Master mode */ - break; - default: - goto out; - } - - pscdata->cfg = ct; - ret = 0; -out: - return ret; -} - -static int au1xpsc_i2s_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params, - struct snd_soc_dai *dai) -{ - struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); - - int cfgbits; - unsigned long stat; - - /* check if the PSC is already streaming data */ - stat = au_readl(I2S_STAT(pscdata)); - if (stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB)) { - /* reject parameters not currently set up in hardware */ - cfgbits = au_readl(I2S_CFG(pscdata)); - if ((PSC_I2SCFG_GET_LEN(cfgbits) != params->msbits) || - (params_rate(params) != pscdata->rate)) - return -EINVAL; - } else { - /* set sample bitdepth */ - pscdata->cfg &= ~(0x1f << 4); - pscdata->cfg |= PSC_I2SCFG_SET_LEN(params->msbits); - /* remember current rate for other stream */ - pscdata->rate = params_rate(params); - } - return 0; -} - -/* Configure PSC late: on my devel systems the codec is I2S master and - * supplies the i2sbitclock __AND__ i2sMclk (!) to the PSC unit. ASoC - * uses aggressive PM and switches the codec off when it is not in use - * which also means the PSC unit doesn't get any clocks and is therefore - * dead. That's why this chunk here gets called from the trigger callback - * because I can be reasonably certain the codec is driving the clocks. - */ -static int au1xpsc_i2s_configure(struct au1xpsc_audio_data *pscdata) -{ - unsigned long tmo; - - /* bring PSC out of sleep, and configure I2S unit */ - au_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata)); - au_sync(); - - tmo = 1000000; - while (!(au_readl(I2S_STAT(pscdata)) & PSC_I2SSTAT_SR) && tmo) - tmo--; - - if (!tmo) - goto psc_err; - - au_writel(0, I2S_CFG(pscdata)); - au_sync(); - au_writel(pscdata->cfg | PSC_I2SCFG_DE_ENABLE, I2S_CFG(pscdata)); - au_sync(); - - /* wait for I2S controller to become ready */ - tmo = 1000000; - while (!(au_readl(I2S_STAT(pscdata)) & PSC_I2SSTAT_DR) && tmo) - tmo--; - - if (tmo) - return 0; - -psc_err: - au_writel(0, I2S_CFG(pscdata)); - au_writel(PSC_CTRL_SUSPEND, PSC_CTRL(pscdata)); - au_sync(); - return -ETIMEDOUT; -} - -static int au1xpsc_i2s_start(struct au1xpsc_audio_data *pscdata, int stype) -{ - unsigned long tmo, stat; - int ret; - - ret = 0; - - /* if both TX and RX are idle, configure the PSC */ - stat = au_readl(I2S_STAT(pscdata)); - if (!(stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB))) { - ret = au1xpsc_i2s_configure(pscdata); - if (ret) - goto out; - } - - au_writel(I2SPCR_CLRFIFO(stype), I2S_PCR(pscdata)); - au_sync(); - au_writel(I2SPCR_START(stype), I2S_PCR(pscdata)); - au_sync(); - - /* wait for start confirmation */ - tmo = 1000000; - while (!(au_readl(I2S_STAT(pscdata)) & I2SSTAT_BUSY(stype)) && tmo) - tmo--; - - if (!tmo) { - au_writel(I2SPCR_STOP(stype), I2S_PCR(pscdata)); - au_sync(); - ret = -ETIMEDOUT; - } -out: - return ret; -} - -static int au1xpsc_i2s_stop(struct au1xpsc_audio_data *pscdata, int stype) -{ - unsigned long tmo, stat; - - au_writel(I2SPCR_STOP(stype), I2S_PCR(pscdata)); - au_sync(); - - /* wait for stop confirmation */ - tmo = 1000000; - while ((au_readl(I2S_STAT(pscdata)) & I2SSTAT_BUSY(stype)) && tmo) - tmo--; - - /* if both TX and RX are idle, disable PSC */ - stat = au_readl(I2S_STAT(pscdata)); - if (!(stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB))) { - au_writel(0, I2S_CFG(pscdata)); - au_sync(); - au_writel(PSC_CTRL_SUSPEND, PSC_CTRL(pscdata)); - au_sync(); - } - return 0; -} - -static int au1xpsc_i2s_trigger(struct snd_pcm_substream *substream, int cmd, - struct snd_soc_dai *dai) -{ - struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); - int ret, stype = substream->stream; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - ret = au1xpsc_i2s_start(pscdata, stype); - break; - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - ret = au1xpsc_i2s_stop(pscdata, stype); - break; - default: - ret = -EINVAL; - } - return ret; -} - -static int au1xpsc_i2s_startup(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); - snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]); - return 0; -} - -static const struct snd_soc_dai_ops au1xpsc_i2s_dai_ops = { - .startup = au1xpsc_i2s_startup, - .trigger = au1xpsc_i2s_trigger, - .hw_params = au1xpsc_i2s_hw_params, - .set_fmt = au1xpsc_i2s_set_fmt, -}; - -static const struct snd_soc_dai_driver au1xpsc_i2s_dai_template = { - .playback = { - .rates = AU1XPSC_I2S_RATES, - .formats = AU1XPSC_I2S_FMTS, - .channels_min = 2, - .channels_max = 8, /* 2 without external help */ - }, - .capture = { - .rates = AU1XPSC_I2S_RATES, - .formats = AU1XPSC_I2S_FMTS, - .channels_min = 2, - .channels_max = 8, /* 2 without external help */ - }, - .ops = &au1xpsc_i2s_dai_ops, -}; - -static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev) -{ - struct resource *iores, *dmares; - unsigned long sel; - int ret; - struct au1xpsc_audio_data *wd; - - wd = devm_kzalloc(&pdev->dev, sizeof(struct au1xpsc_audio_data), - GFP_KERNEL); - if (!wd) - return -ENOMEM; - - iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!iores) - return -ENODEV; - - ret = -EBUSY; - if (!devm_request_mem_region(&pdev->dev, iores->start, - resource_size(iores), - pdev->name)) - return -EBUSY; - - wd->mmio = devm_ioremap(&pdev->dev, iores->start, - resource_size(iores)); - if (!wd->mmio) - return -EBUSY; - - dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0); - if (!dmares) - return -EBUSY; - wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start; - - dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1); - if (!dmares) - return -EBUSY; - wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start; - - /* preserve PSC clock source set up by platform (dev.platform_data - * is already occupied by soc layer) - */ - sel = au_readl(PSC_SEL(wd)) & PSC_SEL_CLK_MASK; - au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); - au_sync(); - au_writel(PSC_SEL_PS_I2SMODE | sel, PSC_SEL(wd)); - au_writel(0, I2S_CFG(wd)); - au_sync(); - - /* preconfigure: set max rx/tx fifo depths */ - wd->cfg |= PSC_I2SCFG_RT_FIFO8 | PSC_I2SCFG_TT_FIFO8; - - /* don't wait for I2S core to become ready now; clocks may not - * be running yet; depending on clock input for PSC a wait might - * time out. - */ - - /* name the DAI like this device instance ("au1xpsc-i2s.PSCINDEX") */ - memcpy(&wd->dai_drv, &au1xpsc_i2s_dai_template, - sizeof(struct snd_soc_dai_driver)); - wd->dai_drv.name = dev_name(&pdev->dev); - - platform_set_drvdata(pdev, wd); - - return snd_soc_register_dai(&pdev->dev, &wd->dai_drv); -} - -static int __devexit au1xpsc_i2s_drvremove(struct platform_device *pdev) -{ - struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev); - - snd_soc_unregister_dai(&pdev->dev); - - au_writel(0, I2S_CFG(wd)); - au_sync(); - au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); - au_sync(); - - return 0; -} - -#ifdef CONFIG_PM -static int au1xpsc_i2s_drvsuspend(struct device *dev) -{ - struct au1xpsc_audio_data *wd = dev_get_drvdata(dev); - - /* save interesting register and disable PSC */ - wd->pm[0] = au_readl(PSC_SEL(wd)); - - au_writel(0, I2S_CFG(wd)); - au_sync(); - au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); - au_sync(); - - return 0; -} - -static int au1xpsc_i2s_drvresume(struct device *dev) -{ - struct au1xpsc_audio_data *wd = dev_get_drvdata(dev); - - /* select I2S mode and PSC clock */ - au_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); - au_sync(); - au_writel(0, PSC_SEL(wd)); - au_sync(); - au_writel(wd->pm[0], PSC_SEL(wd)); - au_sync(); - - return 0; -} - -static struct dev_pm_ops au1xpsci2s_pmops = { - .suspend = au1xpsc_i2s_drvsuspend, - .resume = au1xpsc_i2s_drvresume, -}; - -#define AU1XPSCI2S_PMOPS &au1xpsci2s_pmops - -#else - -#define AU1XPSCI2S_PMOPS NULL - -#endif - -static struct platform_driver au1xpsc_i2s_driver = { - .driver = { - .name = "au1xpsc_i2s", - .owner = THIS_MODULE, - .pm = AU1XPSCI2S_PMOPS, - }, - .probe = au1xpsc_i2s_drvprobe, - .remove = __devexit_p(au1xpsc_i2s_drvremove), -}; - -module_platform_driver(au1xpsc_i2s_driver); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Au12x0/Au1550 PSC I2S ALSA ASoC audio driver"); -MODULE_AUTHOR("Manuel Lauss"); |