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-rw-r--r--sound/soc/fsl/fsl_ssi.c42
-rw-r--r--sound/soc/fsl/fsl_ssi.h2
-rw-r--r--sound/soc/fsl/mpc8610_hpcd.c5
3 files changed, 39 insertions, 10 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 6844009833d..8cb6bcf2c00 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -72,6 +72,7 @@
* @dev: struct device pointer
* @playback: the number of playback streams opened
* @capture: the number of capture streams opened
+ * @asynchronous: 0=synchronous mode, 1=asynchronous mode
* @cpu_dai: the CPU DAI for this device
* @dev_attr: the sysfs device attribute structure
* @stats: SSI statistics
@@ -86,6 +87,7 @@ struct fsl_ssi_private {
struct device *dev;
unsigned int playback;
unsigned int capture;
+ int asynchronous;
struct snd_soc_dai cpu_dai;
struct device_attribute dev_attr;
@@ -301,9 +303,10 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
*
* FIXME: Little-endian samples require a different shift dir
*/
- clrsetbits_be32(&ssi->scr, CCSR_SSI_SCR_I2S_MODE_MASK,
- CCSR_SSI_SCR_TFR_CLK_DIS |
- CCSR_SSI_SCR_I2S_MODE_SLAVE | CCSR_SSI_SCR_SYN);
+ clrsetbits_be32(&ssi->scr,
+ CCSR_SSI_SCR_I2S_MODE_MASK | CCSR_SSI_SCR_SYN,
+ CCSR_SSI_SCR_TFR_CLK_DIS | CCSR_SSI_SCR_I2S_MODE_SLAVE
+ | (ssi_private->asynchronous ? 0 : CCSR_SSI_SCR_SYN));
out_be32(&ssi->stcr,
CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFEN0 |
@@ -382,10 +385,15 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
SNDRV_PCM_HW_PARAM_RATE,
first_runtime->rate, first_runtime->rate);
- snd_pcm_hw_constraint_minmax(substream->runtime,
- SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
- first_runtime->sample_bits,
- first_runtime->sample_bits);
+ /* If we're in synchronous mode, then we need to constrain
+ * the sample size as well. We don't support independent sample
+ * rates in asynchronous mode.
+ */
+ if (!ssi_private->asynchronous)
+ snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+ first_runtime->sample_bits,
+ first_runtime->sample_bits);
ssi_private->second_stream = substream;
}
@@ -421,13 +429,18 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
unsigned int sample_size =
snd_pcm_format_width(params_format(hw_params));
- u32 wl;
+ u32 wl = CCSR_SSI_SxCCR_WL(sample_size);
/* The SSI should always be disabled at this points (SSIEN=0) */
- wl = CCSR_SSI_SxCCR_WL(sample_size);
/* In synchronous mode, the SSI uses STCCR for capture */
- clrsetbits_be32(&ssi->stccr, CCSR_SSI_SxCCR_WL_MASK, wl);
+ if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ||
+ !ssi_private->asynchronous)
+ clrsetbits_be32(&ssi->stccr,
+ CCSR_SSI_SxCCR_WL_MASK, wl);
+ else
+ clrsetbits_be32(&ssi->srccr,
+ CCSR_SSI_SxCCR_WL_MASK, wl);
}
return 0;
@@ -653,6 +666,7 @@ struct snd_soc_dai *fsl_ssi_create_dai(struct fsl_ssi_info *ssi_info)
ssi_private->ssi_phys = ssi_info->ssi_phys;
ssi_private->irq = ssi_info->irq;
ssi_private->dev = ssi_info->dev;
+ ssi_private->asynchronous = ssi_info->asynchronous;
ssi_private->dev->driver_data = fsl_ssi_dai;
@@ -703,6 +717,14 @@ void fsl_ssi_destroy_dai(struct snd_soc_dai *fsl_ssi_dai)
}
EXPORT_SYMBOL_GPL(fsl_ssi_destroy_dai);
+static int __init fsl_ssi_init(void)
+{
+ printk(KERN_INFO "Freescale Synchronous Serial Interface (SSI) ASoC Driver\n");
+
+ return 0;
+}
+module_init(fsl_ssi_init);
+
MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale Synchronous Serial Interface (SSI) ASoC Driver");
MODULE_LICENSE("GPL");
diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h
index 83b44d700e3..eade01feaab 100644
--- a/sound/soc/fsl/fsl_ssi.h
+++ b/sound/soc/fsl/fsl_ssi.h
@@ -208,6 +208,7 @@ struct ccsr_ssi {
* ssi_phys: physical address of the SSI registers
* irq: IRQ of this SSI
* dev: struct device, used to create the sysfs statistics file
+ * asynchronous: 0=synchronous mode, 1=asynchronous mode
*/
struct fsl_ssi_info {
unsigned int id;
@@ -215,6 +216,7 @@ struct fsl_ssi_info {
dma_addr_t ssi_phys;
unsigned int irq;
struct device *dev;
+ int asynchronous;
};
struct snd_soc_dai *fsl_ssi_create_dai(struct fsl_ssi_info *ssi_info);
diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c
index acf39a646b2..ef67d1cdffe 100644
--- a/sound/soc/fsl/mpc8610_hpcd.c
+++ b/sound/soc/fsl/mpc8610_hpcd.c
@@ -353,6 +353,11 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev,
}
ssi_info.irq = machine_data->ssi_irq;
+ /* Do we want to use asynchronous mode? */
+ ssi_info.asynchronous =
+ of_find_property(np, "fsl,ssi-asynchronous", NULL) ? 1 : 0;
+ if (ssi_info.asynchronous)
+ dev_info(&ofdev->dev, "using asynchronous mode\n");
/* Map the global utilities registers. */
guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");