diff options
Diffstat (limited to 'sound/soc/davinci/davinci-i2s.c')
| -rw-r--r-- | sound/soc/davinci/davinci-i2s.c | 340 |
1 files changed, 197 insertions, 143 deletions
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c index b1ea52fc83c..12a6c549ee6 100644 --- a/sound/soc/davinci/davinci-i2s.c +++ b/sound/soc/davinci/davinci-i2s.c @@ -22,6 +22,8 @@ #include <sound/initval.h> #include <sound/soc.h> +#include <mach/asp.h> + #include "davinci-pcm.h" @@ -63,6 +65,7 @@ #define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5) #define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8) #define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16) +#define DAVINCI_MCBSP_RCR_RFIG (1 << 18) #define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21) #define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5) @@ -85,14 +88,6 @@ #define DAVINCI_MCBSP_PCR_FSRM (1 << 10) #define DAVINCI_MCBSP_PCR_FSXM (1 << 11) -#define MOD_REG_BIT(val, mask, set) do { \ - if (set) { \ - val |= mask; \ - } else { \ - val &= ~mask; \ - } \ -} while (0) - enum { DAVINCI_MCBSP_WORD_8 = 0, DAVINCI_MCBSP_WORD_12, @@ -112,6 +107,10 @@ static struct davinci_pcm_dma_params davinci_i2s_pcm_in = { struct davinci_mcbsp_dev { void __iomem *base; +#define MOD_DSP_A 0 +#define MOD_DSP_B 1 + int mode; + u32 pcr; struct clk *clk; struct davinci_pcm_dma_params *dma_params[2]; }; @@ -127,96 +126,100 @@ static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg) return __raw_readl(dev->base + reg); } -static void davinci_mcbsp_start(struct snd_pcm_substream *substream) +static void toggle_clock(struct davinci_mcbsp_dev *dev, int playback) +{ + u32 m = playback ? DAVINCI_MCBSP_PCR_CLKXP : DAVINCI_MCBSP_PCR_CLKRP; + /* The clock needs to toggle to complete reset. + * So, fake it by toggling the clk polarity. + */ + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, dev->pcr ^ m); + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, dev->pcr); +} + +static void davinci_mcbsp_start(struct davinci_mcbsp_dev *dev, + struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_platform *platform = socdev->card->platform; - u32 w; - int ret; - - /* Start the sample generator and enable transmitter/receiver */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST, 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); + u32 spcr; + u32 mask = playback ? DAVINCI_MCBSP_SPCR_XRST : DAVINCI_MCBSP_SPCR_RRST; + spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); + if (spcr & mask) { + /* start off disabled */ + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, + spcr & ~mask); + toggle_clock(dev, playback); + } + if (dev->pcr & (DAVINCI_MCBSP_PCR_FSXM | DAVINCI_MCBSP_PCR_FSRM | + DAVINCI_MCBSP_PCR_CLKXM | DAVINCI_MCBSP_PCR_CLKRM)) { + /* Start the sample generator */ + spcr |= DAVINCI_MCBSP_SPCR_GRST; + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); + } - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + if (playback) { /* Stop the DMA to avoid data loss */ /* while the transmitter is out of reset to handle XSYNCERR */ if (platform->pcm_ops->trigger) { - ret = platform->pcm_ops->trigger(substream, + int ret = platform->pcm_ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); if (ret < 0) printk(KERN_DEBUG "Playback DMA stop failed\n"); } /* Enable the transmitter */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); + spcr |= DAVINCI_MCBSP_SPCR_XRST; + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); /* wait for any unexpected frame sync error to occur */ udelay(100); /* Disable the transmitter to clear any outstanding XSYNCERR */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); + spcr &= ~DAVINCI_MCBSP_SPCR_XRST; + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); + toggle_clock(dev, playback); /* Restart the DMA */ if (platform->pcm_ops->trigger) { - ret = platform->pcm_ops->trigger(substream, + int ret = platform->pcm_ops->trigger(substream, SNDRV_PCM_TRIGGER_START); if (ret < 0) printk(KERN_DEBUG "Playback DMA start failed\n"); } - /* Enable the transmitter */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); - - } else { - - /* Enable the reciever */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); } + /* Enable transmitter or receiver */ + spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); + spcr |= mask; - /* Start frame sync */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_FRST, 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + if (dev->pcr & (DAVINCI_MCBSP_PCR_FSXM | DAVINCI_MCBSP_PCR_FSRM)) { + /* Start frame sync */ + spcr |= DAVINCI_MCBSP_SPCR_FRST; + } + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); } -static void davinci_mcbsp_stop(struct snd_pcm_substream *substream) +static void davinci_mcbsp_stop(struct davinci_mcbsp_dev *dev, int playback) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data; - u32 w; + u32 spcr; /* Reset transmitter/receiver and sample rate/frame sync generators */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST | - DAVINCI_MCBSP_SPCR_FRST, 0); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0); - else - MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 0); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); + spcr &= ~(DAVINCI_MCBSP_SPCR_GRST | DAVINCI_MCBSP_SPCR_FRST); + spcr &= playback ? ~DAVINCI_MCBSP_SPCR_XRST : ~DAVINCI_MCBSP_SPCR_RRST; + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); + toggle_clock(dev, playback); } static int davinci_i2s_startup(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) + struct snd_soc_dai *cpu_dai) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; - struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data; - + struct davinci_mcbsp_dev *dev = cpu_dai->private_data; cpu_dai->dma_data = dev->dma_params[substream->stream]; - return 0; } @@ -228,12 +231,11 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, struct davinci_mcbsp_dev *dev = cpu_dai->private_data; unsigned int pcr; unsigned int srgr; - unsigned int rcr; - unsigned int xcr; srgr = DAVINCI_MCBSP_SRGR_FSGM | DAVINCI_MCBSP_SRGR_FPER(DEFAULT_BITPERSAMPLE * 2 - 1) | DAVINCI_MCBSP_SRGR_FWID(DEFAULT_BITPERSAMPLE - 1); + /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: /* cpu is master */ @@ -258,11 +260,8 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, return -EINVAL; } - rcr = DAVINCI_MCBSP_RCR_RFRLEN1(1); - xcr = DAVINCI_MCBSP_XCR_XFIG | DAVINCI_MCBSP_XCR_XFRLEN1(1); + /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { - case SND_SOC_DAIFMT_DSP_B: - break; case SND_SOC_DAIFMT_I2S: /* Davinci doesn't support TRUE I2S, but some codecs will have * the left and right channels contiguous. This allows @@ -282,8 +281,10 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, */ fmt ^= SND_SOC_DAIFMT_NB_IF; case SND_SOC_DAIFMT_DSP_A: - rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1); - xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1); + dev->mode = MOD_DSP_A; + break; + case SND_SOC_DAIFMT_DSP_B: + dev->mode = MOD_DSP_B; break; default: printk(KERN_ERR "%s:bad format\n", __func__); @@ -343,9 +344,8 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, return -EINVAL; } davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr); + dev->pcr = pcr; davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, pcr); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr); return 0; } @@ -353,31 +353,40 @@ static int davinci_i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct davinci_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data; - struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data; + struct davinci_pcm_dma_params *dma_params = dai->dma_data; + struct davinci_mcbsp_dev *dev = dai->private_data; struct snd_interval *i = NULL; int mcbsp_word_length; - u32 w; + unsigned int rcr, xcr, srgr; + u32 spcr; /* general line settings */ - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); + spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { - w |= DAVINCI_MCBSP_SPCR_RINTM(3) | DAVINCI_MCBSP_SPCR_FREE; - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + spcr |= DAVINCI_MCBSP_SPCR_RINTM(3) | DAVINCI_MCBSP_SPCR_FREE; + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); } else { - w |= DAVINCI_MCBSP_SPCR_XINTM(3) | DAVINCI_MCBSP_SPCR_FREE; - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w); + spcr |= DAVINCI_MCBSP_SPCR_XINTM(3) | DAVINCI_MCBSP_SPCR_FREE; + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); } i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); - w = DAVINCI_MCBSP_SRGR_FSGM; - MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1), 1); + srgr = DAVINCI_MCBSP_SRGR_FSGM; + srgr |= DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1); i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS); - MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1), 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w); + srgr |= DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1); + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr); + rcr = DAVINCI_MCBSP_RCR_RFIG; + xcr = DAVINCI_MCBSP_XCR_XFIG; + if (dev->mode == MOD_DSP_B) { + rcr |= DAVINCI_MCBSP_RCR_RDATDLY(0); + xcr |= DAVINCI_MCBSP_XCR_XDATDLY(0); + } else { + rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1); + xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1); + } /* Determine xfer data type */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: @@ -397,18 +406,31 @@ static int davinci_i2s_hw_params(struct snd_pcm_substream *substream, return -EINVAL; } - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) | - DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length), 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, w); + dma_params->acnt = dma_params->data_type; + rcr |= DAVINCI_MCBSP_RCR_RFRLEN1(1); + xcr |= DAVINCI_MCBSP_XCR_XFRLEN1(1); - } else { - w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG); - MOD_REG_BIT(w, DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) | - DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length), 1); - davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, w); + rcr |= DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) | + DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length); + xcr |= DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) | + DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr); + else + davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr); + return 0; +} + +static int davinci_i2s_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct davinci_mcbsp_dev *dev = dai->private_data; + int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); + davinci_mcbsp_stop(dev, playback); + if ((dev->pcr & DAVINCI_MCBSP_PCR_FSXM) == 0) { + /* codec is master */ + davinci_mcbsp_start(dev, substream); } return 0; } @@ -416,35 +438,72 @@ static int davinci_i2s_hw_params(struct snd_pcm_substream *substream, static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { + struct davinci_mcbsp_dev *dev = dai->private_data; int ret = 0; + int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); + if ((dev->pcr & DAVINCI_MCBSP_PCR_FSXM) == 0) + return 0; /* return if codec is master */ switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - davinci_mcbsp_start(substream); + davinci_mcbsp_start(dev, substream); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - davinci_mcbsp_stop(substream); + davinci_mcbsp_stop(dev, playback); break; default: ret = -EINVAL; } - return ret; } -static int davinci_i2s_probe(struct platform_device *pdev, - struct snd_soc_dai *dai) +static void davinci_i2s_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct davinci_mcbsp_dev *dev = dai->private_data; + int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); + davinci_mcbsp_stop(dev, playback); +} + +#define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000 + +static struct snd_soc_dai_ops davinci_i2s_dai_ops = { + .startup = davinci_i2s_startup, + .shutdown = davinci_i2s_shutdown, + .prepare = davinci_i2s_prepare, + .trigger = davinci_i2s_trigger, + .hw_params = davinci_i2s_hw_params, + .set_fmt = davinci_i2s_set_dai_fmt, + +}; + +struct snd_soc_dai davinci_i2s_dai = { + .name = "davinci-i2s", + .id = 0, + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = DAVINCI_I2S_RATES, + .formats = SNDRV_PCM_FMTBIT_S16_LE,}, + .capture = { + .channels_min = 2, + .channels_max = 2, + .rates = DAVINCI_I2S_RATES, + .formats = SNDRV_PCM_FMTBIT_S16_LE,}, + .ops = &davinci_i2s_dai_ops, + +}; +EXPORT_SYMBOL_GPL(davinci_i2s_dai); + +static int davinci_i2s_probe(struct platform_device *pdev) { - struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_card *card = socdev->card; - struct snd_soc_dai *cpu_dai = card->dai_link->cpu_dai; + struct snd_platform_data *pdata = pdev->dev.platform_data; struct davinci_mcbsp_dev *dev; - struct resource *mem, *ioarea; - struct evm_snd_platform_data *pdata; + struct resource *mem, *ioarea, *res; int ret; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -466,8 +525,6 @@ static int davinci_i2s_probe(struct platform_device *pdev, goto err_release_region; } - cpu_dai->private_data = dev; - dev->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(dev->clk)) { ret = -ENODEV; @@ -476,18 +533,37 @@ static int davinci_i2s_probe(struct platform_device *pdev, clk_enable(dev->clk); dev->base = (void __iomem *)IO_ADDRESS(mem->start); - pdata = pdev->dev.platform_data; dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK] = &davinci_i2s_pcm_out; - dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = pdata->tx_dma_ch; dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->dma_addr = (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG); dev->dma_params[SNDRV_PCM_STREAM_CAPTURE] = &davinci_i2s_pcm_in; - dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = pdata->rx_dma_ch; dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->dma_addr = (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG); + /* first TX, then RX */ + res = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (!res) { + dev_err(&pdev->dev, "no DMA resource\n"); + ret = -ENXIO; + goto err_free_mem; + } + dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = res->start; + + res = platform_get_resource(pdev, IORESOURCE_DMA, 1); + if (!res) { + dev_err(&pdev->dev, "no DMA resource\n"); + ret = -ENXIO; + goto err_free_mem; + } + dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = res->start; + + davinci_i2s_dai.private_data = dev; + ret = snd_soc_register_dai(&davinci_i2s_dai); + if (ret != 0) + goto err_free_mem; + return 0; err_free_mem: @@ -498,62 +574,40 @@ err_release_region: return ret; } -static void davinci_i2s_remove(struct platform_device *pdev, - struct snd_soc_dai *dai) +static int davinci_i2s_remove(struct platform_device *pdev) { - struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_card *card = socdev->card; - struct snd_soc_dai *cpu_dai = card->dai_link->cpu_dai; - struct davinci_mcbsp_dev *dev = cpu_dai->private_data; + struct davinci_mcbsp_dev *dev = davinci_i2s_dai.private_data; struct resource *mem; + snd_soc_unregister_dai(&davinci_i2s_dai); clk_disable(dev->clk); clk_put(dev->clk); dev->clk = NULL; - kfree(dev); - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(mem->start, (mem->end - mem->start) + 1); -} -#define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000 - -static struct snd_soc_dai_ops davinci_i2s_dai_ops = { - .startup = davinci_i2s_startup, - .trigger = davinci_i2s_trigger, - .hw_params = davinci_i2s_hw_params, - .set_fmt = davinci_i2s_set_dai_fmt, -}; + return 0; +} -struct snd_soc_dai davinci_i2s_dai = { - .name = "davinci-i2s", - .id = 0, - .probe = davinci_i2s_probe, - .remove = davinci_i2s_remove, - .playback = { - .channels_min = 2, - .channels_max = 2, - .rates = DAVINCI_I2S_RATES, - .formats = SNDRV_PCM_FMTBIT_S16_LE,}, - .capture = { - .channels_min = 2, - .channels_max = 2, - .rates = DAVINCI_I2S_RATES, - .formats = SNDRV_PCM_FMTBIT_S16_LE,}, - .ops = &davinci_i2s_dai_ops, +static struct platform_driver davinci_mcbsp_driver = { + .probe = davinci_i2s_probe, + .remove = davinci_i2s_remove, + .driver = { + .name = "davinci-asp", + .owner = THIS_MODULE, + }, }; -EXPORT_SYMBOL_GPL(davinci_i2s_dai); static int __init davinci_i2s_init(void) { - return snd_soc_register_dai(&davinci_i2s_dai); + return platform_driver_register(&davinci_mcbsp_driver); } module_init(davinci_i2s_init); static void __exit davinci_i2s_exit(void) { - snd_soc_unregister_dai(&davinci_i2s_dai); + platform_driver_unregister(&davinci_mcbsp_driver); } module_exit(davinci_i2s_exit); 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