static int s3c_dma_prepare(struct snd_pcm_substream *substream)
{
struct s3c24xx_runtime_data *prtd = substream->runtime->private_data;
int ret = 0;
pr_debug("Entered %s\n", __func__);
if (!prtd->params)
return 0;
/* channel needs configuring for mem=>device, increment memory addr,
* sync to pclk, half-word transfers to the IIS-FIFO. */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_MEM,
prtd->params->dma_addr);
} else {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_HW,
prtd->params->dma_addr);
}
s3c2410_dma_config(prtd->params->channel,
prtd->params->dma_size);
/* flush the DMA channel */
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
/* enqueue dma buffers */
s3c_dma_enqueue(substream);
return ret;
}
static void s3c24xx_audio_buffdone(struct s3c2410_dma_chan *channel,
void *dev_id, int size,
enum s3c2410_dma_buffresult result)
{
struct snd_pcm_substream *substream = dev_id;
struct s3c24xx_runtime_data *prtd;
pr_debug("Entered %s\n", __func__);
if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
return;
prtd = substream->runtime->private_data;
if (substream)
snd_pcm_period_elapsed(substream);
spin_lock(&prtd->lock);
if (prtd->state & ST_RUNNING /*&& !s3c_dma_has_circular()*/) { //sayanta commented..need to check functionality it return FALSE anyway
prtd->dma_loaded--;
s3c_dma_enqueue(substream);
}
spin_unlock(&prtd->lock);
}
static void s3c24xx_audio_buffdone(struct s3c2410_dma_chan *channel,
void *dev_id, int size,
enum s3c2410_dma_buffresult result)
{
struct snd_pcm_substream *substream = dev_id;
struct s3c24xx_runtime_data *prtd;
pr_debug("Entered %s\n", __func__);
if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
return;
prtd = substream->runtime->private_data;
if (substream)
snd_pcm_period_elapsed(substream);
spin_lock(&prtd->lock);
if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) {
prtd->dma_loaded--;
#ifndef NEW_DMA
s3c_dma_enqueue(substream);
#endif
}
spin_unlock(&prtd->lock);
}
static void s3c24xx_audio_buffdone(struct s3c2410_dma_chan *channel,
void *dev_id, int size,
enum s3c2410_dma_buffresult result)
{
struct snd_pcm_substream *substream = dev_id;
struct s3c24xx_runtime_data *prtd;
pr_debug("Entered %s\n", __func__);
if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
return;
prtd = substream->runtime->private_data;
/* By Jung */
prtd->dma_pos += prtd->dma_period;
if (prtd->dma_pos >= prtd->dma_end)
prtd->dma_pos = prtd->dma_start;
//if (substream) //fixed 68937 (REVERSE_INULL) prevent defect
snd_pcm_period_elapsed(substream);
spin_lock(&prtd->lock);
if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) {
s3c_dma_enqueue(substream);
}
spin_unlock(&prtd->lock);
}
static int s3c_dma_prepare(struct snd_pcm_substream *substream)
{
struct s3c24xx_runtime_data *prtd = substream->runtime->private_data;
int ret = 0;
pr_debug("Entered %s\n", __func__);
/* return if this is a bufferless transfer e.g.
* codec <--> BT codec or GSM modem -- lg FIXME */
if (!prtd->params)
return 0;
/* channel needs configuring for mem=>device, increment memory addr,
* sync to pclk, half-word transfers to the IIS-FIFO. */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_MEM,
prtd->params->dma_addr);
} else {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_HW,
prtd->params->dma_addr);
}
s3c2410_dma_config(prtd->params->channel,
prtd->params->dma_size);
/* To fix the pcm buffer underrun in case of high busy state ( ex. Starting broswer ) 2010.06.22*/
if(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ring_buf_index = 0;
period_index = 0;
}
/* flush the DMA channel */
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
/* enqueue dma buffers */
s3c_dma_enqueue(substream);
return ret;
}
//static void s3c24xx_audio_buffdone(struct s3c2410_dma_chan *channel,
// void *dev_id, int size,
// enum s3c2410_dma_buffresult result)
static void audio_buffdone(void *data)
{
//struct snd_pcm_substream *substream = dev_id;
//struct s3c24xx_runtime_data *prtd;
struct snd_pcm_substream *substream = data;
struct s3c24xx_runtime_data *prtd = substream->runtime->private_data;
pr_debug("Entered %s\n", __func__);
//if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
// return;
//
//prtd = substream->runtime->private_data;
if (prtd->state & ST_RUNNING) {
prtd->dma_pos += prtd->dma_period;
if (prtd->dma_pos >= prtd->dma_end)
prtd->dma_pos = prtd->dma_start;
//if (substream)
// snd_pcm_period_elapsed(substream);
if (substream)
snd_pcm_period_elapsed(substream);
//spin_lock(&prtd->lock);
//if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) {
// prtd->dma_loaded--;
// s3c_dma_enqueue(substream);
//}
spin_lock(&prtd->lock);
if (!samsung_dma_has_circular()) {
prtd->dma_loaded--;
s3c_dma_enqueue(substream);
}
spin_unlock(&prtd->lock);
}
//spin_unlock(&prtd->lock);
}
static int s3c_dma_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct s3c24xx_runtime_data *prtd = substream->runtime->private_data;
int ret = 0;
pr_debug("Entered %s\n", __func__);
spin_lock(&prtd->lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_RESUME:
s3c_dma_enqueue(substream);
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
prtd->state |= ST_RUNNING;
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (prtd->dma_loaded)
prtd->dma_loaded--;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
prtd->state &= ~ST_RUNNING;
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP);
break;
default:
ret = -EINVAL;
break;
}
spin_unlock(&prtd->lock);
return ret;
}
static void s3c_sdi_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct s3c_sdi_host *host = mmc_priv(mmc);
u32 sdi_carg, sdi_ccon, sdi_timer, sdi_fsta;
u32 sdi_bsize, sdi_dcon = 0, sdi_imsk;
u32 dma_dir = 0;
unsigned long complete_timeout = msecs_to_jiffies( 1000 ); // 1000 msec timeout on wait for command completion
WARN_ON(host->mrq != NULL);
DBG("#############request: [CMD] opcode:0x%02x arg:0x%08x flags:%x retries:%u\n",
mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags, mrq->cmd->retries);
host->mrq = mrq;
sdi_ccon = mrq->cmd->opcode & S3C_SDICCON_INDEX;
sdi_ccon|= (S3C_SDICCON_SENDERHOST | S3C_SDICCON_CMDSTART);
#ifdef CONFIG_S3CMCI_DEBUG
{
cmd_rec[cmd_idx] = mrq->cmd->opcode;
cmd_idx++;
cmd_idx %= 40;
}
#endif
sdi_carg = mrq->cmd->arg;
/* XXX: Timer value ?! */
/* If the workaround for read is enabled, change the timer value. */
if( host->ena_2410_workaround )
sdi_timer=0xFFFF;
else
sdi_timer= 0x7fffff;
sdi_bsize= 0;
/* enable interrupts for transmission errors */
sdi_imsk = (S3C_SDIIMSK_RESPONSEND | S3C_SDIIMSK_CRCSTATUS);
host->complete_what = COMPLETION_CMDSENT;
if (RSP_TYPE(mmc_resp_type(mrq->cmd))) {
host->complete_what = COMPLETION_RSPFIN;
sdi_ccon |= S3C_SDICCON_WAITRSP;
sdi_imsk |= S3C_SDIIMSK_CMDTIMEOUT;
} else {
/* We need the CMDSENT-Interrupt only if we want are not waiting
* for a response
*/
sdi_imsk |= S3C_SDIIMSK_CMDSENT;
}
if (mrq->cmd->flags & MMC_RSP_136) {
sdi_ccon|= S3C_SDICCON_LONGRSP;
}
if (mrq->cmd->flags & MMC_RSP_CRC) {
sdi_imsk |= S3C_SDIIMSK_RESPONSECRC;
}
if (mrq->data) {
host->complete_what = COMPLETION_XFERFINISH_RSPFIN;
sdi_ccon|= S3C_SDICCON_WITHDATA;
sdi_bsize = mrq->data->blksz;
sdi_dcon = (mrq->data->blocks & S3C_SDIDCON_BLKNUM_MASK);
sdi_dcon |= S3C_SDIDCON_DMAEN;
if( !host->ena_2410_workaround )
sdi_dcon |= S3C_SDIDCON_WORDTX;
if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
sdi_dcon |= S3C_SDIDCON_WIDEBUS;
}
sdi_imsk |= 0xFFFFFFE0;
DBG(PFX "request: [DAT] bsize:%u blocks:%u bytes:%u\n",
sdi_bsize, mrq->data->blocks, mrq->data->blocks * sdi_bsize);
if (!(mrq->data->flags & MMC_DATA_STREAM)) {
sdi_dcon |= S3C_SDIDCON_BLOCKMODE;
}
if (mrq->data->flags & MMC_DATA_WRITE) {
sdi_dcon |= S3C_SDIDCON_TXAFTERRESP;
sdi_dcon |= S3C_SDIDCON_XFER_TX;
if( !host->ena_2410_workaround )
sdi_dcon |= S3C_SDIDCON_DSTART;
s3c_sdi_dma_setup(host, DMAP_WRITE);
dma_dir = DMA_TO_DEVICE;
} else {
sdi_dcon |= S3C_SDIDCON_RXAFTERCMD;
sdi_dcon |= S3C_SDIDCON_XFER_RX;
if( !host->ena_2410_workaround )
sdi_dcon |= S3C_SDIDCON_DSTART;
s3c_sdi_dma_setup(host, DMAP_READ);
dma_dir = DMA_FROM_DEVICE;
}
/* Clear FAIL bits also for the fifo. */
sdi_fsta = S3C_SDIFSTA_FRST | S3C_SDIFSTA_FIFOFAIL;
__raw_writel(sdi_fsta,host->base + S3C_SDIFSTA);
/* start DMA */
dma_map_sg(mmc_dev(mmc), mrq->data->sg, mrq->data->sg_len, dma_dir);
#ifdef CONFIG_ARCH_MDIRAC3
s3c_dma_enqueue(host->dma,host->subchannel,(void *) host,
sg_dma_address(mrq->data->sg),
(mrq->data->blocks * mrq->data->blksz) );
#else
s3c_dma_enqueue(host->dma, (void *) host,
sg_dma_address(mrq->data->sg),
(mrq->data->blocks * mrq->data->blksz) );
#endif
/* Check if we should enable the workaround for timeouts in the 2410 soc. */
/* Since we want to go as fast as possible, don't use the maximum divider.*/
/* dividing by 90 will give a clock of roughly 553MHz. This should be safe*/
/* enough. */
host->prescaler=readl( host->base + S3C_SDIPRE );
if( host->ena_2410_workaround && (mrq->data->flags & MMC_DATA_READ) )
writel( (clk_get_rate( host->clk )/533000), host->base + S3C_SDIPRE );
}
host->mrq = mrq;
init_completion(&host->complete_request);
init_completion(&host->complete_dma);
/* Clear command and data status registers */
writel(0xFFFFFFFF, host->base + S3C_SDICSTA);
writel(0xFFFFFFFF, host->base + S3C_SDIDSTA);
/* Setup SDI controller */
writel(sdi_bsize,host->base + S3C_SDIBSIZE);
writel(sdi_timer,host->base + S3C_SDITIMER);
writel(sdi_imsk,host->base + S3C_SDIIMSK);
/* Setup SDI command argument and data control */
writel(sdi_carg, host->base + S3C_SDICARG);
writel(sdi_dcon, host->base + S3C_SDIDCON);
/* This initiates transfer */
writel(sdi_ccon, host->base + S3C_SDICCON);
/* Workaround for S3C2410. When the receive transfer has started we can write the */
/* original prescaler back to transfer at maximum speed. Talk about a dirty hack...*/
if( host->ena_2410_workaround && (mrq->data != NULL) && (mrq->data->flags & MMC_DATA_READ) )
{
/* Start polling if the receive transfer has started.... */
while( ((readl( host->base + S3C_SDIFSTA ) & 0x7F) == 0) && ((readl( host->base + S3C_SDIDSTA ) & 0x30) == 0) )
{
/* Ensure that if an error occurs, we can still exit. */
if( readl( host->base + S3C_SDIDSTA ) & (S3C_SDIDSTA_FIFOFAIL | S3C_SDIDSTA_CRCFAIL |
S3C_SDIDSTA_RXCRCFAIL | S3C_SDIDSTA_DATATIMEOUT |
S3C_SDIDSTA_SBITERR) )
break;
}
writel( host->prescaler, host->base + S3C_SDIPRE );
}
/* this wait is very important to sd/mmc run correctly.
* Without this blocking code, operation sequence may be crashed.
* by scsuh.
*/
/* Wait for transfer to complete */
wait_for_completion_timeout(&host->complete_request, complete_timeout);
if (mrq->data && (host->mrq->data->error == MMC_ERR_NONE)) {
if (wait_for_completion_timeout(&host->complete_dma, complete_timeout) == 0)
{
#ifdef CONFIG_ARCH_MDIRAC3
s3c_dma_ctrl(host->dma,host->subchannel, S3C_DMAOP_FLUSH);
#else
s3c_dma_ctrl(host->dma, S3C_DMAOP_FLUSH);
#endif
}
DBG("[DAT] DMA complete.\n");
sdi_fsta = readl(host->base + S3C_SDIFSTA);
writel(sdi_fsta,host->base + S3C_SDIFSTA);
}
/* Cleanup controller */
writel(0, host->base + S3C_SDICARG);
writel(0, host->base + S3C_SDIDCON);
writel(0, host->base + S3C_SDICCON);
writel(0, host->base + S3C_SDIIMSK);
/* Read response */
mrq->cmd->resp[0] = readl(host->base + S3C_SDIRSP0);
mrq->cmd->resp[1] = readl(host->base + S3C_SDIRSP1);
mrq->cmd->resp[2] = readl(host->base + S3C_SDIRSP2);
mrq->cmd->resp[3] = readl(host->base + S3C_SDIRSP3);
host->mrq = NULL;
DBG(PFX "request done.\n");
if (mrq->data) {
dma_unmap_sg(mmc_dev(mmc), mrq->data->sg, mrq->data->sg_len, dma_dir);
/* Calculate the about of bytes transfer, but only if there was
* no error
*/
if (mrq->data->error == MMC_ERR_NONE)
mrq->data->bytes_xfered = (mrq->data->blocks * mrq->data->blksz);
else
mrq->data->bytes_xfered = 0;
/* If we had an error while transferring data we flush the
* DMA channel to clear out any garbage
*/
if (mrq->data->error != MMC_ERR_NONE) {
#ifdef CONFIG_ARCH_MDIRAC3
s3c_dma_ctrl(host->dma,host->subchannel, S3C_DMAOP_FLUSH);
#else
s3c_dma_ctrl(host->dma, S3C_DMAOP_FLUSH);
#endif
DBG(PFX "flushing DMA.\n");
}
/* Issue stop command */
if (mrq->data->stop)
mmc_wait_for_cmd(mmc, mrq->data->stop, 3);
}
mrq->done(mrq);
}