Change xfer_size name to apply to PDC and DMA aswell. Specify overrun bit in interrupt mask. Add dmaengine specific routines and replace PDC ones in pcm_ops if appropriate. Uses cyclic DMA API for queuing samples.

Signed-off-by: Nicolas Ferre nicolas.ferre@atmel.com [voice.shen@atmel.com: align with mainline kernel, address Vinod's comments] Signed-off-by: Bo Shen voice.shen@atmel.com --- sound/soc/atmel/atmel-pcm.c | 369 +++++++++++++++++++++++++++++++++++---- sound/soc/atmel/atmel-pcm.h | 4 +- sound/soc/atmel/atmel_ssc_dai.c | 30 ++-- 3 files changed, 358 insertions(+), 45 deletions(-)

diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c index 40e17d1..c9d1246 100644 --- a/sound/soc/atmel/atmel-pcm.c +++ b/sound/soc/atmel/atmel-pcm.c @@ -37,7 +37,9 @@ #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/atmel_pdc.h> +#include <linux/dmaengine.h> #include <linux/atmel-ssc.h> +#include <linux/platform_data/dma-atmel.h>

#include <sound/core.h> #include <sound/pcm.h> @@ -53,7 +55,7 @@ /* TODO: These values were taken from the AT91 platform driver, check * them against real values for AT32 */ -static const struct snd_pcm_hardware atmel_pcm_hardware = { +static const struct snd_pcm_hardware atmel_pcm_pdc_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | @@ -66,6 +68,22 @@ static const struct snd_pcm_hardware atmel_pcm_hardware = { .buffer_bytes_max = 32 * 1024, };

+static const struct snd_pcm_hardware atmel_pcm_dma_hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_PAUSE, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .period_bytes_min = 256, /* lighting DMA overhead */ + .period_bytes_max = 2 * 0xffff, /* if 2 bytes format */ + .periods_min = 8, + .periods_max = 1024, /* no limit */ + .buffer_bytes_max = 64 * 1024, /* 64KiB */ +}; + +static const struct snd_pcm_hardware *atmel_pcm_hardware; +

/*--------------------------------------------------------------------------*\ * Data types @@ -77,12 +95,19 @@ struct atmel_runtime_data { size_t period_size;

dma_addr_t period_ptr; /* physical address of next period */ + int periods; /* period index of period_ptr */

/* PDC register save */ u32 pdc_xpr_save; u32 pdc_xcr_save; u32 pdc_xnpr_save; u32 pdc_xncr_save; + + /* dmaengine data */ + struct at_dma_slave atslave; + struct dma_async_tx_descriptor *desc; + dma_cookie_t cookie; + struct dma_chan *dma_chan; };

@@ -94,7 +119,7 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, { struct snd_pcm_substream *substream = pcm->streams[stream].substream; struct snd_dma_buffer *buf = &substream->dma_buffer; - size_t size = atmel_pcm_hardware.buffer_bytes_max; + size_t size = atmel_pcm_hardware->buffer_bytes_max;

buf->dev.type = SNDRV_DMA_TYPE_DEV; buf->dev.dev = pcm->card->dev; @@ -116,7 +141,7 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, /*--------------------------------------------------------------------------*\ * ISR *--------------------------------------------------------------------------*/ -static void atmel_pcm_dma_irq(u32 ssc_sr, +static void atmel_pcm_pdc_irq(u32 ssc_sr, struct snd_pcm_substream *substream) { struct atmel_runtime_data *prtd = substream->runtime->private_data; @@ -142,7 +167,7 @@ static void atmel_pcm_dma_irq(u32 ssc_sr, ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xcr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size); ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, params->mask->pdc_enable); } @@ -156,12 +181,152 @@ static void atmel_pcm_dma_irq(u32 ssc_sr, ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xncr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size); + } + + snd_pcm_period_elapsed(substream); +} + +/** + * atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC + * + * We use DMAENGINE to send/receive data to/from SSC so this ISR is only to + * check if any overrun occured. + */ +static void atmel_pcm_dma_irq(u32 ssc_sr, + struct snd_pcm_substream *substream) +{ + struct atmel_runtime_data *prtd = substream->runtime->private_data; + struct atmel_pcm_dma_params *params = prtd->params; + + if (ssc_sr & params->mask->ssc_error) { + if (snd_pcm_running(substream)) + pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x)\n", + substream->stream == SNDRV_PCM_STREAM_PLAYBACK + ? "underrun" : "overrun", params->name, + ssc_sr); + + /* stop RX and capture: will be enabled again at restart */ + ssc_writex(params->ssc->regs, SSC_CR, + params->mask->ssc_disable); + snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); + + /* now drain RHR and read status to remove xrun condition */ + ssc_readx(params->ssc->regs, SSC_RHR); + ssc_readx(params->ssc->regs, SSC_SR); } +} + +/*--------------------------------------------------------------------------*\ + * DMAENGINE operations +*--------------------------------------------------------------------------*/ +static void audio_dma_irq(void *data) +{ + struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data; + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + + prtd->period_ptr += prtd->period_size; + if (prtd->period_ptr >= prtd->dma_buffer_end) + prtd->period_ptr = prtd->dma_buffer;

snd_pcm_period_elapsed(substream); }

+static bool filter(struct dma_chan *chan, void *slave) +{ + struct at_dma_slave *sl = slave; + + if (sl->dma_dev == chan->device->dev) { + chan->private = sl; + return true; + } else { + return false; + } +} + +static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + struct ssc_device *ssc = prtd->params->ssc; + struct dma_slave_config slave_config; + enum dma_slave_buswidth buswidth; + struct at_dma_slave *sdata = NULL; + int ret; + + if (ssc->pdev) + sdata = ssc->pdev->dev.platform_data; + + if (sdata && sdata->dma_dev) { + dma_cap_mask_t mask; + + /* Try to grab a DMA channel */ + dma_cap_zero(mask); + dma_cap_set(DMA_CYCLIC, mask); + prtd->dma_chan = dma_request_channel(mask, filter, sdata); + if (!prtd->dma_chan) { + pr_err("atmel-pcm: DMA channel not available\n"); + return -EBUSY; + } + } else { + return -EINVAL; + } + + if (prtd->desc) + dmaengine_terminate_all(prtd->dma_chan); + + switch (prtd->params->data_xfer_size) { + case 1: + buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; + break; + case 2: + buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; + break; + case 4: + buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; + break; + default: + goto err; + } + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + slave_config.direction = DMA_MEM_TO_DEV; + slave_config.dst_addr_width = buswidth; + slave_config.dst_addr = (dma_addr_t)ssc->phybase + SSC_THR; + slave_config.dst_maxburst = buswidth; + } else { + slave_config.direction = DMA_DEV_TO_MEM; + slave_config.src_addr_width = buswidth; + slave_config.src_addr = (dma_addr_t)ssc->phybase + SSC_RHR; + slave_config.src_maxburst = buswidth; + } + slave_config.device_fc = false; + + if (dmaengine_slave_config(prtd->dma_chan, &slave_config)) { + pr_err("atmel-pcm: failed to configure dma channel\n"); + ret = -EBUSY; + goto err; + } + + prtd->desc = dmaengine_prep_dma_cyclic(prtd->dma_chan, + prtd->dma_buffer, + prtd->period_size * prtd->periods, + prtd->period_size, + substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? + DMA_TO_DEVICE : DMA_FROM_DEVICE, + 0); + + prtd->desc->callback = audio_dma_irq; + prtd->desc->callback_param = substream; + + return 0; + +err: + dma_release_channel(prtd->dma_chan); + return ret; +}

/*--------------------------------------------------------------------------*\ * PCM operations @@ -172,6 +337,7 @@ static int atmel_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_runtime *runtime = substream->runtime; struct atmel_runtime_data *prtd = runtime->private_data; struct snd_soc_pcm_runtime *rtd = substream->private_data; + int ret;

/* this may get called several times by oss emulation * with different params */ @@ -180,18 +346,33 @@ static int atmel_pcm_hw_params(struct snd_pcm_substream *substream, runtime->dma_bytes = params_buffer_bytes(params);

prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - prtd->params->dma_intr_handler = atmel_pcm_dma_irq;

prtd->dma_buffer = runtime->dma_addr; prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes; prtd->period_size = params_period_bytes(params); + prtd->periods = params_periods(params); + + if (prtd->params->ssc->pdata->use_dma) { + ret = atmel_pcm_configure_dma(substream, params); + if (ret) { + pr_err("atmel-pcm: failed to configure dma"); + return ret; + } + + prtd->params->dma_intr_handler = atmel_pcm_dma_irq; + } else { + prtd->params->dma_intr_handler = atmel_pcm_pdc_irq; + }

pr_debug("atmel-pcm: " - "hw_params: DMA for %s initialized " + "hw_params: %s%s for %s initialized " "(dma_bytes=%u, period_size=%u)\n", + prtd->dma_chan ? "DMA " : "PDC", + prtd->dma_chan ? dma_chan_name(prtd->dma_chan) : "", prtd->params->name, runtime->dma_bytes, prtd->period_size); + return 0; }

@@ -201,15 +382,30 @@ static int atmel_pcm_hw_free(struct snd_pcm_substream *substream) struct atmel_pcm_dma_params *params = prtd->params;

if (params != NULL) { - ssc_writex(params->ssc->regs, SSC_PDC_PTCR, - params->mask->pdc_disable); + if (params->ssc->pdata->use_dma) { + struct dma_chan *chan = prtd->dma_chan; + + if (chan) { + dmaengine_terminate_all(chan); + prtd->cookie = 0; + prtd->desc = NULL; + dma_release_channel(chan); + prtd->dma_chan = NULL; + } + } else { + ssc_writex(params->ssc->regs, SSC_PDC_PTCR, + params->mask->pdc_disable); + } prtd->params->dma_intr_handler = NULL; }

return 0; }

-static int atmel_pcm_prepare(struct snd_pcm_substream *substream) +/*--------------------------------------------------------------------------*\ + * PCM callbacks using PDC +*--------------------------------------------------------------------------*/ +static int atmel_pcm_pdc_prepare(struct snd_pcm_substream *substream) { struct atmel_runtime_data *prtd = substream->runtime->private_data; struct atmel_pcm_dma_params *params = prtd->params; @@ -221,7 +417,7 @@ static int atmel_pcm_prepare(struct snd_pcm_substream *substream) return 0; }

-static int atmel_pcm_trigger(struct snd_pcm_substream *substream, +static int atmel_pcm_pdc_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_pcm_runtime *rtd = substream->runtime; @@ -240,13 +436,13 @@ static int atmel_pcm_trigger(struct snd_pcm_substream *substream, ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xcr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size);

prtd->period_ptr += prtd->period_size; ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xncr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size);

pr_debug("atmel-pcm: trigger: " "period_ptr=%lx, xpr=%u, " @@ -264,7 +460,7 @@ static int atmel_pcm_trigger(struct snd_pcm_substream *substream,

pr_debug("sr=%u imr=%u\n", ssc_readx(params->ssc->regs, SSC_SR), - ssc_readx(params->ssc->regs, SSC_IER)); + ssc_readx(params->ssc->regs, SSC_IMR)); break; /* SNDRV_PCM_TRIGGER_START */

case SNDRV_PCM_TRIGGER_STOP: @@ -287,7 +483,7 @@ static int atmel_pcm_trigger(struct snd_pcm_substream *substream, return ret; }

-static snd_pcm_uframes_t atmel_pcm_pointer( +static snd_pcm_uframes_t atmel_pcm_pdc_pointer( struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; @@ -305,13 +501,102 @@ static snd_pcm_uframes_t atmel_pcm_pointer( return x; }

+/*--------------------------------------------------------------------------*\ + * PCM callbacks using DMAENGINE +*--------------------------------------------------------------------------*/ +static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream) +{ + struct atmel_runtime_data *prtd = substream->runtime->private_data; + struct atmel_pcm_dma_params *params = prtd->params; + + ssc_writex(params->ssc->regs, SSC_IDR, params->mask->ssc_error); + return 0; +} + +static int atmel_pcm_dma_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + struct snd_pcm_runtime *rtd = substream->runtime; + struct atmel_runtime_data *prtd = rtd->private_data; + struct atmel_pcm_dma_params *params = prtd->params; + dma_cookie_t cookie; + int ret = 0; + + pr_debug("atmel-pcm: trigger %d: buffer_size = %ld, " + "dma_area = %p, dma_bytes = %u\n", + cmd, rtd->buffer_size, rtd->dma_area, rtd->dma_bytes); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + + if (prtd->cookie < DMA_MIN_COOKIE) { + cookie = dmaengine_submit(prtd->desc); + prtd->cookie = cookie; + prtd->period_ptr = prtd->dma_buffer; + } + + pr_debug("atmel-pcm: trigger: start sr=0x%08x imr=0x%08u\n", + ssc_readx(params->ssc->regs, SSC_SR), + ssc_readx(params->ssc->regs, SSC_IMR)); + + /* fallback */ + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + dmaengine_resume(prtd->dma_chan); + + /* It not already done or comming from xrun state */ + ssc_readx(params->ssc->regs, SSC_SR); + ssc_writex(params->ssc->regs, SSC_IER, params->mask->ssc_error); + ssc_writex(params->ssc->regs, SSC_CR, params->mask->ssc_enable); + + break; + case SNDRV_PCM_TRIGGER_STOP: + pr_debug("atmel-pcm: trigger: stop cmd = %d\n", cmd); + + ssc_writex(params->ssc->regs, SSC_IDR, params->mask->ssc_error); + + /* fallback */ + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + dmaengine_pause(prtd->dma_chan); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static snd_pcm_uframes_t atmel_pcm_dma_pointer( + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + snd_pcm_uframes_t x; + + dev_vdbg(substream->pcm->card->dev, "%s: 0x%08x %ld\n", + __func__, prtd->period_ptr, + bytes_to_frames(runtime, prtd->period_ptr - prtd->dma_buffer)); + + x = bytes_to_frames(runtime, prtd->period_ptr - prtd->dma_buffer); + + if (x >= runtime->buffer_size) + x = 0; + + return x; +} + + +/*--------------------------------------------------------------------------*\ + * PCM open/close/mmap +*--------------------------------------------------------------------------*/ static int atmel_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct atmel_runtime_data *prtd; int ret = 0;

- snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware); + snd_soc_set_runtime_hwparams(substream, atmel_pcm_hardware);

/* ensure that buffer size is a multiple of period size */ ret = snd_pcm_hw_constraint_integer(runtime, @@ -352,9 +637,9 @@ static struct snd_pcm_ops atmel_pcm_ops = { .ioctl = snd_pcm_lib_ioctl, .hw_params = atmel_pcm_hw_params, .hw_free = atmel_pcm_hw_free, - .prepare = atmel_pcm_prepare, - .trigger = atmel_pcm_trigger, - .pointer = atmel_pcm_pointer, + .prepare = atmel_pcm_pdc_prepare, + .trigger = atmel_pcm_pdc_trigger, + .pointer = atmel_pcm_pdc_pointer, .mmap = atmel_pcm_mmap, };

@@ -420,21 +705,25 @@ static int atmel_pcm_suspend(struct snd_soc_dai *dai) struct snd_pcm_runtime *runtime = dai->runtime; struct atmel_runtime_data *prtd; struct atmel_pcm_dma_params *params; + struct ssc_device *ssc;

if (!runtime) return 0;

prtd = runtime->private_data; params = prtd->params; + ssc = params->ssc;

- /* disable the PDC and save the PDC registers */ + if (!ssc->pdata->use_dma) { + /* disable the PDC and save the PDC registers */

- ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable); + ssc_writel(ssc->regs, PDC_PTCR, params->mask->pdc_disable);

- prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr); - prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr); - prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr); - prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr); + prtd->pdc_xpr_save = ssc_readx(ssc->regs, params->pdc->xpr); + prtd->pdc_xcr_save = ssc_readx(ssc->regs, params->pdc->xcr); + prtd->pdc_xnpr_save = ssc_readx(ssc->regs, params->pdc->xnpr); + prtd->pdc_xncr_save = ssc_readx(ssc->regs, params->pdc->xncr); + }

return 0; } @@ -444,20 +733,25 @@ static int atmel_pcm_resume(struct snd_soc_dai *dai) struct snd_pcm_runtime *runtime = dai->runtime; struct atmel_runtime_data *prtd; struct atmel_pcm_dma_params *params; + struct ssc_device *ssc;

if (!runtime) return 0;

prtd = runtime->private_data; params = prtd->params; + ssc = params->ssc;

- /* restore the PDC registers and enable the PDC */ - ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save); - ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save); - ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save); - ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save); + if (!ssc->pdata->use_dma) { + /* restore the PDC registers and enable the PDC */ + ssc_writex(ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save); + ssc_writex(ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save); + ssc_writex(ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save); + ssc_writex(ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save); + + ssc_writel(ssc->regs, PDC_PTCR, params->mask->pdc_enable); + }

- ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable); return 0; } #else @@ -475,6 +769,19 @@ static struct snd_soc_platform_driver atmel_soc_platform = {

int atmel_pcm_platform_register(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); + struct ssc_device *ssc = platform_get_drvdata(pdev); + + if (ssc->pdata->use_dma) { + atmel_pcm_ops.prepare = atmel_pcm_dma_prepare; + atmel_pcm_ops.trigger = atmel_pcm_dma_trigger; + atmel_pcm_ops.pointer = atmel_pcm_dma_pointer; + + atmel_pcm_hardware = &atmel_pcm_dma_hardware; + } else { + atmel_pcm_hardware = &atmel_pcm_pdc_hardware; + } + return snd_soc_register_platform(dev, &atmel_soc_platform); } EXPORT_SYMBOL(atmel_pcm_platform_register); diff --git a/sound/soc/atmel/atmel-pcm.h b/sound/soc/atmel/atmel-pcm.h index e6d67b3..261331d 100644 --- a/sound/soc/atmel/atmel-pcm.h +++ b/sound/soc/atmel/atmel-pcm.h @@ -50,6 +50,7 @@ struct atmel_pdc_regs { struct atmel_ssc_mask { u32 ssc_enable; /* SSC recv/trans enable */ u32 ssc_disable; /* SSC recv/trans disable */ + u32 ssc_error; /* SSC error conditions */ u32 ssc_endx; /* SSC ENDTX or ENDRX */ u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ u32 pdc_enable; /* PDC recv/trans enable */ @@ -66,7 +67,8 @@ struct atmel_ssc_mask { */ struct atmel_pcm_dma_params { char *name; /* stream identifier */ - int pdc_xfer_size; /* PDC counter increment in bytes */ + int data_xfer_size; /* PDC counter increment in bytes, + DMA data transfer size in bytes */ struct ssc_device *ssc; /* SSC device for stream */ struct atmel_pdc_regs *pdc; /* PDC receive or transmit registers */ struct atmel_ssc_mask *mask; /* SSC & PDC status bits */ diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index 7932c05..a87d6d8 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -82,6 +82,7 @@ static struct atmel_ssc_mask ssc_tx_mask = { static struct atmel_ssc_mask ssc_rx_mask = { .ssc_enable = SSC_BIT(CR_RXEN), .ssc_disable = SSC_BIT(CR_RXDIS), + .ssc_error = SSC_BIT(SR_OVRUN), .ssc_endx = SSC_BIT(SR_ENDRX), .ssc_endbuf = SSC_BIT(SR_RXBUFF), .pdc_enable = ATMEL_PDC_RXTEN, @@ -175,7 +176,8 @@ static irqreturn_t atmel_ssc_interrupt(int irq, void *dev_id) if ((dma_params != NULL) && (dma_params->dma_intr_handler != NULL)) { ssc_substream_mask = (dma_params->mask->ssc_endx | - dma_params->mask->ssc_endbuf); + dma_params->mask->ssc_endbuf | + dma_params->mask->ssc_error); if (ssc_sr & ssc_substream_mask) { dma_params->dma_intr_handler(ssc_sr, dma_params-> @@ -368,19 +370,19 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: bits = 8; - dma_params->pdc_xfer_size = 1; + dma_params->data_xfer_size = 1; break; case SNDRV_PCM_FORMAT_S16_LE: bits = 16; - dma_params->pdc_xfer_size = 2; + dma_params->data_xfer_size = 2; break; case SNDRV_PCM_FORMAT_S24_LE: bits = 24; - dma_params->pdc_xfer_size = 4; + dma_params->data_xfer_size = 4; break; case SNDRV_PCM_FORMAT_S32_LE: bits = 32; - dma_params->pdc_xfer_size = 4; + dma_params->data_xfer_size = 4; break; default: printk(KERN_WARNING "atmel_ssc_dai: unsupported PCM format"); @@ -553,15 +555,17 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, /* Reset the SSC and its PDC registers */ ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));

- ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0); + if (!ssc_p->ssc->pdata->use_dma) { + ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0);

- ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0); + }

ret = request_irq(ssc_p->ssc->irq, atmel_ssc_interrupt, 0, ssc_p->name, ssc_p);