* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
- * Revision history
- * 3rd Mar 2006 Initial version.
*/
#include <linux/init.h>
#include <asm/arch/at91_pdc.h>
#include "at91-pcm.h"
+#include "at91-i2s.h"
#if 0
#define DBG(x...) printk(KERN_DEBUG "at91-i2s:" x)
#endif
-#define AT91_I2S_DAIFMT \
- (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_NB_NF)
-
-#define AT91_I2S_DIR \
- (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
-
-/* priv is (SSC_CMR.DIV << 16 | SSC_TCMR.PERIOD ) */
-static struct snd_soc_dai_mode at91_i2s[] = {
-
- /* 8k: BCLK = (MCLK/10) = (60MHz/50) = 1.2MHz */
- {
- .fmt = AT91_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_8000,
- .pcmdir = AT91_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 1500,
- .bfs = SND_SOC_FSBD(10),
- .priv = (25 << 16 | 74),
- },
-
- /* 16k: BCLK = (MCLK/3) ~= (60MHz/14) = 4.285714MHz */
- {
- .fmt = AT91_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_16000,
- .pcmdir = AT91_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 750,
- .bfs = SND_SOC_FSBD(3),
- .priv = (7 << 16 | 133),
- },
-
- /* 32k: BCLK = (MCLK/3) ~= (60MHz/14) = 4.285714MHz */
- {
- .fmt = AT91_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_32000,
- .pcmdir = AT91_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 375,
- .bfs = SND_SOC_FSBD(3),
- .priv = (7 << 16 | 66),
- },
-
- /* 48k: BCLK = (MCLK/5) ~= (60MHz/26) = 2.3076923MHz */
- {
- .fmt = AT91_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_48000,
- .pcmdir = AT91_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 250,
- .bfs = SND_SOC_FSBD(5),
- .priv = (13 << 16 | 23),
- },
-};
-
-
/*
* SSC PDC registers required by the PCM DMA engine.
*/
#endif
};
-
-/*
- * A MUTEX is used to protect an SSC initialzed flag which allows
- * the substream hw_params() call to initialize the SSC only if
- * there are no other substreams open. If there are other
- * substreams open, the hw_param() call can only check that
- * it is using the same format and rate.
- */
-static DECLARE_MUTEX(ssc0_mutex);
-#if NUM_SSC_DEVICES == 3
-static DECLARE_MUTEX(ssc1_mutex);
-static DECLARE_MUTEX(ssc2_mutex);
-#endif
-
-
struct at91_ssc_state {
u32 ssc_cmr;
u32 ssc_rcmr;
u32 ssc_imr;
};
-
static struct at91_ssc_info {
char *name;
struct at91_ssc_periph ssc;
spinlock_t lock; /* lock for dir_mask */
- int dir_mask; /* 0=unused, 1=playback, 2=capture */
- struct semaphore *mutex;
- int initialized;
- int pcmfmt;
- int rate;
+ unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */
+ unsigned short initialized; /* 1=SSC has been initialized */
+ unsigned short daifmt;
+ unsigned short cmr_div;
+ unsigned short tcmr_period;
+ unsigned short rcmr_period;
struct at91_pcm_dma_params *dma_params[2];
struct at91_ssc_state ssc_state;
.name = "ssc0",
.lock = SPIN_LOCK_UNLOCKED,
.dir_mask = 0,
- .mutex = &ssc0_mutex,
.initialized = 0,
},
#if NUM_SSC_DEVICES == 3
.name = "ssc1",
.lock = SPIN_LOCK_UNLOCKED,
.dir_mask = 0,
- .mutex = &ssc1_mutex,
.initialized = 0,
},
{
.name = "ssc2",
.lock = SPIN_LOCK_UNLOCKED,
.dir_mask = 0,
- .mutex = &ssc2_mutex,
.initialized = 0,
},
#endif
};
+static unsigned int at91_i2s_sysclk;
+/*
+ * SSC interrupt handler. Passes PDC interrupts to the DMA
+ * interrupt handler in the PCM driver.
+ */
static irqreturn_t at91_i2s_interrupt(int irq, void *dev_id)
{
struct at91_ssc_info *ssc_p = dev_id;
return IRQ_HANDLED;
}
+/*
+ * Startup. Only that one substream allowed in each direction.
+ */
static int at91_i2s_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91_ssc_info *ssc_p = &ssc_info[rtd->cpu_dai->id];
+ struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
int dir_mask;
DBG("i2s_startup: SSC_SR=0x%08lx\n",
ssc_p->dir_mask |= dir_mask;
spin_unlock_irq(&ssc_p->lock);
- /*
- * dma_data is not set until hw_params() is called and
- * shutdown() depends on this value being NULL if hw_params()
- * was not called.
- */
- rtd->cpu_dai->dma_data = NULL;
-
return 0;
}
+/*
+ * Shutdown. Clear DMA parameters and shutdown the SSC if there
+ * are no other substreams open.
+ */
static void at91_i2s_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91_ssc_info *ssc_p = &ssc_info[rtd->cpu_dai->id];
- struct at91_pcm_dma_params *dma_params = rtd->cpu_dai->dma_data;
+ struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+ struct at91_pcm_dma_params *dma_params;
int dir, dir_mask;
dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
+ dma_params = ssc_p->dma_params[dir];
if (dma_params != NULL) {
at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->ssc.pid);
- if (ssc_p->initialized)
+ if (ssc_p->initialized) {
free_irq(ssc_p->ssc.pid, ssc_p);
+ ssc_p->initialized = 0;
+ }
/* Reset the SSC */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
- /* Force a re-init on the next hw_params() call. */
- ssc_p->initialized = 0;
+ /* Clear the SSC dividers */
+ ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;
}
spin_unlock_irq(&ssc_p->lock);
}
-#ifdef CONFIG_PM
-static int at91_i2s_suspend(struct platform_device *pdev,
- struct snd_soc_cpu_dai *dai)
+/*
+ * Record the SSC system clock rate.
+ */
+static int at91_i2s_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
+ int clk_id, unsigned int freq, int dir)
{
- struct at91_ssc_info *ssc_p;
-
- if(!dai->active)
- return 0;
-
- ssc_p = &ssc_info[dai->id];
-
- /* Save the status register before disabling transmit and receive. */
- ssc_p->ssc_state.ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR);
- at91_ssc_write(ssc_p->ssc.base +
- AT91_SSC_CR, AT91_SSC_TXDIS | AT91_SSC_RXDIS);
-
- /* Save the current interrupt mask, then disable unmasked interrupts. */
- ssc_p->ssc_state.ssc_imr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IDR, ssc_p->ssc_state.ssc_imr);
-
- ssc_p->ssc_state.ssc_cmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_CMR);
- ssc_p->ssc_state.ssc_rcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
- ssc_p->ssc_state.ssc_rfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
- ssc_p->ssc_state.ssc_tcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
- ssc_p->ssc_state.ssc_tfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+ /*
+ * The only clock supplied to the SSC is the AT91 master clock,
+ * which is only used if the SSC is generating BCLK and/or
+ * LRC clocks.
+ */
+ switch (clk_id) {
+ case AT91_SYSCLK_MCK:
+ at91_i2s_sysclk = freq;
+ break;
+ default:
+ return -EINVAL;
+ }
return 0;
}
-static int at91_i2s_resume(struct platform_device *pdev,
- struct snd_soc_cpu_dai *dai)
+/*
+ * Record the DAI format for use in hw_params().
+ */
+static int at91_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
+ unsigned int fmt)
{
- struct at91_ssc_info *ssc_p;
- u32 cr_mask;
-
- if(!dai->active)
- return 0;
-
- ssc_p = &ssc_info[dai->id];
+ struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_tfmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_tcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_rfmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_rcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->ssc_state.ssc_cmr);
-
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IER, ssc_p->ssc_state.ssc_imr);
-
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
- ((ssc_p->ssc_state.ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
- ((ssc_p->ssc_state.ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
+ if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S)
+ return -EINVAL;
+ ssc_p->daifmt = fmt;
return 0;
}
-#else
-#define at91_i2s_suspend NULL
-#define at91_i2s_resume NULL
-#endif
-
-static unsigned int at91_i2s_config_sysclk(
- struct snd_soc_cpu_dai *iface, struct snd_soc_clock_info *info,
- unsigned int clk)
+/*
+ * Record SSC clock dividers for use in hw_params().
+ */
+static int at91_i2s_set_dai_clkdiv(struct snd_soc_cpu_dai *cpu_dai,
+ int div_id, int div)
{
- /* Currently, there is only support for USB (12Mhz) mode */
- if (clk != 12000000)
- return 0;
- return 12000000;
+ struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
+
+ switch (div_id) {
+ case AT91SSC_CMR_DIV:
+ /*
+ * The same master clock divider is used for both
+ * transmit and receive, so if a value has already
+ * been set, it must match this value.
+ */
+ if (ssc_p->cmr_div == 0)
+ ssc_p->cmr_div = div;
+ else
+ if (div != ssc_p->cmr_div)
+ return -EBUSY;
+ break;
+
+ case AT91SSC_TCMR_PERIOD:
+ ssc_p->tcmr_period = div;
+ break;
+
+ case AT91SSC_RCMR_PERIOD:
+ ssc_p->rcmr_period = div;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
}
+/*
+ * Configure the SSC.
+ */
static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- int id = rtd->cpu_dai->id;
+ int id = rtd->dai->cpu_dai->id;
struct at91_ssc_info *ssc_p = &ssc_info[id];
struct at91_pcm_dma_params *dma_params;
- unsigned int pcmfmt, rate;
int dir, channels, bits;
- struct clk *mck_clk;
- u32 div, period, tfmr, rfmr, tcmr, rcmr;
+ u32 tfmr, rfmr, tcmr, rcmr;
+ int start_event;
int ret;
/*
dma_params->substream = substream;
ssc_p->dma_params[dir] = dma_params;
- rtd->cpu_dai->dma_data = dma_params;
- rate = params_rate(params);
- channels = params_channels(params);
+ /*
+ * The cpu_dai->dma_data field is only used to communicate the
+ * appropriate DMA parameters to the pcm driver hw_params()
+ * function. It should not be used for other purposes
+ * as it is common to all substreams.
+ */
+ rtd->dai->cpu_dai->dma_data = dma_params;
- pcmfmt = rtd->cpu_dai->dai_runtime.pcmfmt;
- switch (pcmfmt) {
- case SNDRV_PCM_FMTBIT_S16_LE:
- /* likely this is all we'll ever support, but ... */
- bits = 16;
- dma_params->pdc_xfer_size = 2;
- break;
- default:
- printk(KERN_WARNING "at91-i2s: unsupported format %x\n",
- pcmfmt);
- return -EINVAL;
- }
+ channels = params_channels(params);
- /* Don't allow both SSC substreams to initialize at the same time. */
- down(ssc_p->mutex);
+ /*
+ * The SSC only supports up to 16-bit samples in I2S format, due
+ * to the size of the Frame Mode Register FSLEN field. Also, I2S
+ * implies signed data.
+ */
+ bits = 16;
+ dma_params->pdc_xfer_size = 2;
/*
- * If this SSC is alreadly initialized, then this substream must use
- * the same format and rate.
+ * Compute SSC register settings.
*/
- if (ssc_p->initialized) {
- if (pcmfmt != ssc_p->pcmfmt || rate != ssc_p->rate) {
- printk(KERN_WARNING "at91-i2s: "
- "incompatible substream in other direction\n");
- up(ssc_p->mutex);
- return -EINVAL;
- }
- } else {
+ switch (ssc_p->daifmt) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ /*
+ * SSC provides BCLK and LRC clocks.
+ *
+ * The SSC transmit and receive clocks are generated from the
+ * MCK divider, and the BCLK signal is output on the SSC TK line.
+ */
+ rcmr = (( ssc_p->rcmr_period << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
+ | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
+
+ rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
+ | (((bits - 1) << 16) & AT91_SSC_FSLEN)
+ | (((channels - 1) << 8) & AT91_SSC_DATNB)
+ | (( 1 << 7) & AT91_SSC_MSBF)
+ | (( 0 << 5) & AT91_SSC_LOOP)
+ | (((bits - 1) << 0) & AT91_SSC_DATALEN);
+
+ tcmr = (( ssc_p->tcmr_period << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
+ | (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
+
+ tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( 0 << 23) & AT91_SSC_FSDEN)
+ | (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
+ | (((bits - 1) << 16) & AT91_SSC_FSLEN)
+ | (((channels - 1) << 8) & AT91_SSC_DATNB)
+ | (( 1 << 7) & AT91_SSC_MSBF)
+ | (( 0 << 5) & AT91_SSC_DATDEF)
+ | (((bits - 1) << 0) & AT91_SSC_DATALEN);
+ break;
+
+ case SND_SOC_DAIFMT_CBM_CFM:
+
+ /*
+ * CODEC supplies BCLK and LRC clocks.
+ *
+ * The SSC transmit clock is obtained from the BCLK signal on
+ * on the TK line, and the SSC receive clock is generated from the
+ * transmit clock.
+ *
+ * For single channel data, one sample is transferred on the falling
+ * edge of the LRC clock. For two channel data, one sample is
+ * transferred on both edges of the LRC clock.
+ */
+ start_event = channels == 1
+ ? AT91_SSC_START_FALLING_RF
+ : AT91_SSC_START_EDGE_RF;
+
+ rcmr = (( 0 << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( start_event ) & AT91_SSC_START)
+ | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_CLOCK ) & AT91_SSC_CKS);
+
+ rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
+ | (( 0 << 16) & AT91_SSC_FSLEN)
+ | (( 0 << 8) & AT91_SSC_DATNB)
+ | (( 1 << 7) & AT91_SSC_MSBF)
+ | (( 0 << 5) & AT91_SSC_LOOP)
+ | (((bits - 1) << 0) & AT91_SSC_DATALEN);
+
+ tcmr = (( 0 << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( start_event ) & AT91_SSC_START)
+ | (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_PIN ) & AT91_SSC_CKS);
+
+ tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( 0 << 23) & AT91_SSC_FSDEN)
+ | (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
+ | (( 0 << 16) & AT91_SSC_FSLEN)
+ | (( 0 << 8) & AT91_SSC_DATNB)
+ | (( 1 << 7) & AT91_SSC_MSBF)
+ | (( 0 << 5) & AT91_SSC_DATDEF)
+ | (((bits - 1) << 0) & AT91_SSC_DATALEN);
+ break;
+
+ case SND_SOC_DAIFMT_CBS_CFM:
+ case SND_SOC_DAIFMT_CBM_CFS:
+ default:
+ printk(KERN_WARNING "at91-i2s: unsupported DAI format 0x%x.\n",
+ ssc_p->daifmt);
+ return -EINVAL;
+ break;
+ }
+ DBG("RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n", rcmr, rfmr, tcmr, tfmr);
+
+ if (!ssc_p->initialized) {
+
/* Enable PMC peripheral clock for this SSC */
DBG("Starting pid %d clock\n", ssc_p->ssc.pid);
at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
- /* Reset the SSC */
+ /* Reset the SSC and its PDC registers */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RPR, 0);
at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TNPR, 0);
at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TNCR, 0);
- div = rtd->cpu_dai->dai_runtime.priv >> 16;
- period = rtd->cpu_dai->dai_runtime.priv & 0xffff;
-
- mck_clk = clk_get(NULL, "mck");
-
- DBG("mck %lu fsbd %u bfs %llu bfs_real %u bclk %lu div %u period %u\n",
- clk_get_rate(mck_clk),
- SND_SOC_FSBD(6),
- rtd->cpu_dai->dai_runtime.bfs,
- SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs),
- clk_get_rate(mck_clk) / (2 * div),
- div,
- period);
-
- clk_put(mck_clk);
-
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, div);
-
- /*
- * Setup the TFMR and RFMR for the proper data format.
- */
- tfmr =
- (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( 0 << 23) & AT91_SSC_FSDEN)
- | (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
- | (((bits - 1) << 16) & AT91_SSC_FSLEN)
- | (((channels - 1) << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_DATDEF)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
- DBG("SSC_TFMR=0x%08x\n", tfmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, tfmr);
-
- rfmr =
- (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
- | (( 0 << 16) & AT91_SSC_FSLEN)
- | (((channels - 1) << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_LOOP)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
-
- DBG("SSC_RFMR=0x%08x\n", rfmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, rfmr);
-
- /*
- * Setup the TCMR and RCMR to generate the proper BCLK
- * and LRC signals.
- */
- tcmr =
- (( period << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
- | (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
-
- DBG("SSC_TCMR=0x%08x\n", tcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, tcmr);
-
- rcmr =
- (( 0 << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_TX_RX ) & AT91_SSC_START)
- | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_CLOCK ) & AT91_SSC_CKS);
-
- DBG("SSC_RCMR=0x%08x\n", rcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, rcmr);
-
if ((ret = request_irq(ssc_p->ssc.pid, at91_i2s_interrupt,
0, ssc_p->name, ssc_p)) < 0) {
printk(KERN_WARNING "at91-i2s: request_irq failure\n");
+
+ DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
+ at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
return ret;
}
- /*
- * Save the current substream parameters in order to check
- * that the substream in the opposite direction uses the
- * same parameters.
- */
- ssc_p->pcmfmt = pcmfmt;
- ssc_p->rate = rate;
ssc_p->initialized = 1;
-
- DBG("hw_params: SSC initialized\n");
}
- up(ssc_p->mutex);
+ /* set SSC clock mode register */
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->cmr_div);
+
+ /* set receive clock mode and format */
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, rcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, rfmr);
+
+ /* set transmit clock mode and format */
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, tcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, tfmr);
+ DBG("hw_params: SSC initialized\n");
return 0;
}
static int at91_i2s_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91_pcm_dma_params *dma_params = rtd->cpu_dai->dma_data;
+ struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+ struct at91_pcm_dma_params *dma_params;
+ int dir;
+
+ dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
+ dma_params = ssc_p->dma_params[dir];
at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
dma_params->mask->ssc_enable);
- DBG("%s enabled SSC_SR=0x%08lx\n",
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "transmit" : "receive",
- at91_ssc_read(ssc_info[rtd->cpu_dai->id].ssc.base + AT91_SSC_SR));
+ DBG("%s enabled SSC_SR=0x%08lx\n", dir ? "receive" : "transmit",
+ at91_ssc_read(dma_params->ssc_base + AT91_SSC_SR));
return 0;
}
+#ifdef CONFIG_PM
+static int at91_i2s_suspend(struct platform_device *pdev,
+ struct snd_soc_cpu_dai *cpu_dai)
+{
+ struct at91_ssc_info *ssc_p;
+
+ if(!cpu_dai->active)
+ return 0;
+
+ ssc_p = &ssc_info[cpu_dai->id];
+
+ /* Save the status register before disabling transmit and receive. */
+ ssc_p->ssc_state.ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
+ AT91_SSC_TXDIS | AT91_SSC_RXDIS);
+
+ /* Save the current interrupt mask, then disable unmasked interrupts. */
+ ssc_p->ssc_state.ssc_imr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IDR, ssc_p->ssc_state.ssc_imr);
+
+ ssc_p->ssc_state.ssc_cmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_CMR);
+ ssc_p->ssc_state.ssc_rcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+ ssc_p->ssc_state.ssc_rfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RFMR);
+ ssc_p->ssc_state.ssc_tcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TCMR);
+ ssc_p->ssc_state.ssc_tfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TFMR);
+
+ return 0;
+}
+
+static int at91_i2s_resume(struct platform_device *pdev,
+ struct snd_soc_cpu_dai *cpu_dai)
+{
+ struct at91_ssc_info *ssc_p;
+
+ if(!cpu_dai->active)
+ return 0;
+
+ ssc_p = &ssc_info[cpu_dai->id];
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, ssc_p->ssc_state.ssc_tfmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, ssc_p->ssc_state.ssc_tcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, ssc_p->ssc_state.ssc_rfmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_rcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->ssc_state.ssc_cmr);
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IER, ssc_p->ssc_state.ssc_imr);
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
+ ((ssc_p->ssc_state.ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
+ ((ssc_p->ssc_state.ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
+
+ return 0;
+}
+
+#else
+#define at91_i2s_suspend NULL
+#define at91_i2s_resume NULL
+#endif
+
+#define AT91_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
+ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
+ SNDRV_PCM_RATE_96000)
+
struct snd_soc_cpu_dai at91_i2s_dai[NUM_SSC_DEVICES] = {
{ .name = "at91_ssc0/i2s",
.id = 0,
.type = SND_SOC_DAI_I2S,
.suspend = at91_i2s_suspend,
.resume = at91_i2s_resume,
- .config_sysclk = at91_i2s_config_sysclk,
.playback = {
.channels_min = 1,
- .channels_max = 2,},
+ .channels_max = 2,
+ .rates = AT91_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.channels_min = 1,
- .channels_max = 2,},
+ .channels_max = 2,
+ .rates = AT91_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = {
.startup = at91_i2s_startup,
.shutdown = at91_i2s_shutdown,
.prepare = at91_i2s_prepare,
.hw_params = at91_i2s_hw_params,},
- .caps = {
- .mode = &at91_i2s[0],
- .num_modes = ARRAY_SIZE(at91_i2s),},
+ .dai_ops = {
+ .set_sysclk = at91_i2s_set_dai_sysclk,
+ .set_fmt = at91_i2s_set_dai_fmt,
+ .set_clkdiv = at91_i2s_set_dai_clkdiv,},
.private_data = &ssc_info[0].ssc,
},
#if NUM_SSC_DEVICES == 3
.type = SND_SOC_DAI_I2S,
.suspend = at91_i2s_suspend,
.resume = at91_i2s_resume,
- .config_sysclk = at91_i2s_config_sysclk,
.playback = {
.channels_min = 1,
- .channels_max = 2,},
+ .channels_max = 2,
+ .rates = AT91_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.channels_min = 1,
- .channels_max = 2,},
+ .channels_max = 2,
+ .rates = AT91_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = {
.startup = at91_i2s_startup,
.shutdown = at91_i2s_shutdown,
.prepare = at91_i2s_prepare,
.hw_params = at91_i2s_hw_params,},
- .caps = {
- .mode = &at91_i2s[0],
- .num_modes = ARRAY_SIZE(at91_i2s),},
+ .dai_ops = {
+ .set_sysclk = at91_i2s_set_dai_sysclk,
+ .set_fmt = at91_i2s_set_dai_fmt,
+ .set_clkdiv = at91_i2s_set_dai_clkdiv,},
.private_data = &ssc_info[1].ssc,
},
{ .name = "at91_ssc2/i2s",
.type = SND_SOC_DAI_I2S,
.suspend = at91_i2s_suspend,
.resume = at91_i2s_resume,
- .config_sysclk = at91_i2s_config_sysclk,
.playback = {
.channels_min = 1,
- .channels_max = 2,},
+ .channels_max = 2,
+ .rates = AT91_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.channels_min = 1,
- .channels_max = 2,},
+ .channels_max = 2,
+ .rates = AT91_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = {
.startup = at91_i2s_startup,
.shutdown = at91_i2s_shutdown,
.prepare = at91_i2s_prepare,
.hw_params = at91_i2s_hw_params,},
- .caps = {
- .mode = &at91_i2s[0],
- .num_modes = ARRAY_SIZE(at91_i2s),},
+ .dai_ops = {
+ .set_sysclk = at91_i2s_set_dai_sysclk,
+ .set_fmt = at91_i2s_set_dai_fmt,
+ .set_clkdiv = at91_i2s_set_dai_clkdiv,},
.private_data = &ssc_info[2].ssc,
},
#endif
projects / linux-2.6 / commitdiff