| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Manuel Lauss | 1555 | 93.79% | 6 | 33.33% |
| Julia Lawall | 34 | 2.05% | 2 | 11.11% |
| Kuninori Morimoto | 20 | 1.21% | 1 | 5.56% |
| Axel Lin | 12 | 0.72% | 2 | 11.11% |
| Eric Miao | 11 | 0.66% | 1 | 5.56% |
| Liam Girdwood | 10 | 0.60% | 1 | 5.56% |
| Mark Brown | 10 | 0.60% | 1 | 5.56% |
| Tejun Heo | 3 | 0.18% | 1 | 5.56% |
| Roel Kluin | 1 | 0.06% | 1 | 5.56% |
| Lars-Peter Clausen | 1 | 0.06% | 1 | 5.56% |
| Gustavo A. R. Silva | 1 | 0.06% | 1 | 5.56% |
| Total | 1658 | 18 |
/* * 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 = __raw_readl(I2S_STAT(pscdata)); if (stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB)) { /* reject parameters not currently set up in hardware */ cfgbits = __raw_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 */ __raw_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata)); wmb(); /* drain writebuffer */ tmo = 1000000; while (!(__raw_readl(I2S_STAT(pscdata)) & PSC_I2SSTAT_SR) && tmo) tmo--; if (!tmo) goto psc_err; __raw_writel(0, I2S_CFG(pscdata)); wmb(); /* drain writebuffer */ __raw_writel(pscdata->cfg | PSC_I2SCFG_DE_ENABLE, I2S_CFG(pscdata)); wmb(); /* drain writebuffer */ /* wait for I2S controller to become ready */ tmo = 1000000; while (!(__raw_readl(I2S_STAT(pscdata)) & PSC_I2SSTAT_DR) && tmo) tmo--; if (tmo) return 0; psc_err: __raw_writel(0, I2S_CFG(pscdata)); __raw_writel(PSC_CTRL_SUSPEND, PSC_CTRL(pscdata)); wmb(); /* drain writebuffer */ 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 = __raw_readl(I2S_STAT(pscdata)); if (!(stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB))) { ret = au1xpsc_i2s_configure(pscdata); if (ret) goto out; } __raw_writel(I2SPCR_CLRFIFO(stype), I2S_PCR(pscdata)); wmb(); /* drain writebuffer */ __raw_writel(I2SPCR_START(stype), I2S_PCR(pscdata)); wmb(); /* drain writebuffer */ /* wait for start confirmation */ tmo = 1000000; while (!(__raw_readl(I2S_STAT(pscdata)) & I2SSTAT_BUSY(stype)) && tmo) tmo--; if (!tmo) { __raw_writel(I2SPCR_STOP(stype), I2S_PCR(pscdata)); wmb(); /* drain writebuffer */ ret = -ETIMEDOUT; } out: return ret; } static int au1xpsc_i2s_stop(struct au1xpsc_audio_data *pscdata, int stype) { unsigned long tmo, stat; __raw_writel(I2SPCR_STOP(stype), I2S_PCR(pscdata)); wmb(); /* drain writebuffer */ /* wait for stop confirmation */ tmo = 1000000; while ((__raw_readl(I2S_STAT(pscdata)) & I2SSTAT_BUSY(stype)) && tmo) tmo--; /* if both TX and RX are idle, disable PSC */ stat = __raw_readl(I2S_STAT(pscdata)); if (!(stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB))) { __raw_writel(0, I2S_CFG(pscdata)); wmb(); /* drain writebuffer */ __raw_writel(PSC_CTRL_SUSPEND, PSC_CTRL(pscdata)); wmb(); /* drain writebuffer */ } 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 const struct snd_soc_component_driver au1xpsc_i2s_component = { .name = "au1xpsc-i2s", }; static int au1xpsc_i2s_drvprobe(struct platform_device *pdev) { struct resource *iores, *dmares; unsigned long sel; 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); wd->mmio = devm_ioremap_resource(&pdev->dev, iores); if (IS_ERR(wd->mmio)) return PTR_ERR(wd->mmio); 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 = __raw_readl(PSC_SEL(wd)) & PSC_SEL_CLK_MASK; __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); wmb(); /* drain writebuffer */ __raw_writel(PSC_SEL_PS_I2SMODE | sel, PSC_SEL(wd)); __raw_writel(0, I2S_CFG(wd)); wmb(); /* drain writebuffer */ /* 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_component(&pdev->dev, &au1xpsc_i2s_component, &wd->dai_drv, 1); } static int au1xpsc_i2s_drvremove(struct platform_device *pdev) { struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev); snd_soc_unregister_component(&pdev->dev); __raw_writel(0, I2S_CFG(wd)); wmb(); /* drain writebuffer */ __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); wmb(); /* drain writebuffer */ 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] = __raw_readl(PSC_SEL(wd)); __raw_writel(0, I2S_CFG(wd)); wmb(); /* drain writebuffer */ __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); wmb(); /* drain writebuffer */ 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 */ __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); wmb(); /* drain writebuffer */ __raw_writel(0, PSC_SEL(wd)); wmb(); /* drain writebuffer */ __raw_writel(wd->pm[0], PSC_SEL(wd)); wmb(); /* drain writebuffer */ return 0; } static const 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", .pm = AU1XPSCI2S_PMOPS, }, .probe = au1xpsc_i2s_drvprobe, .remove = 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");
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