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Diffstat (limited to 'sound/soc/sh/fsi.c')
-rw-r--r--sound/soc/sh/fsi.c271
1 files changed, 130 insertions, 141 deletions
diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c
index 44123248b63..9c49c11c43c 100644
--- a/sound/soc/sh/fsi.c
+++ b/sound/soc/sh/fsi.c
@@ -17,7 +17,7 @@
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/list.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -26,8 +26,6 @@
#include <sound/pcm_params.h>
#include <sound/sh_fsi.h>
#include <asm/atomic.h>
-#include <asm/dma.h>
-#include <asm/dma-sh.h>
#define DO_FMT 0x0000
#define DOFF_CTL 0x0004
@@ -97,7 +95,6 @@ struct fsi_priv {
int fifo_max;
int chan;
- int dma_chan;
int byte_offset;
int period_len;
@@ -108,7 +105,6 @@ struct fsi_priv {
struct fsi_master {
void __iomem *base;
int irq;
- struct clk *clk;
struct fsi_priv fsia;
struct fsi_priv fsib;
struct sh_fsi_platform_info *info;
@@ -308,62 +304,6 @@ static int fsi_get_fifo_residue(struct fsi_priv *fsi, int is_play)
return residue;
}
-static int fsi_get_residue(struct fsi_priv *fsi, int is_play)
-{
- int residue;
- int width;
- struct snd_pcm_runtime *runtime;
-
- runtime = fsi->substream->runtime;
-
- /* get 1 channel data width */
- width = frames_to_bytes(runtime, 1) / fsi->chan;
-
- if (2 == width)
- residue = fsi_get_fifo_residue(fsi, is_play);
- else
- residue = get_dma_residue(fsi->dma_chan);
-
- return residue;
-}
-
-/************************************************************************
-
-
- basic dma function
-
-
-************************************************************************/
-#define PORTA_DMA 0
-#define PORTB_DMA 1
-
-static int fsi_get_dma_chan(void)
-{
- if (0 != request_dma(PORTA_DMA, "fsia"))
- return -EIO;
-
- if (0 != request_dma(PORTB_DMA, "fsib")) {
- free_dma(PORTA_DMA);
- return -EIO;
- }
-
- master->fsia.dma_chan = PORTA_DMA;
- master->fsib.dma_chan = PORTB_DMA;
-
- return 0;
-}
-
-static void fsi_free_dma_chan(void)
-{
- dma_wait_for_completion(PORTA_DMA);
- dma_wait_for_completion(PORTB_DMA);
- free_dma(PORTA_DMA);
- free_dma(PORTB_DMA);
-
- master->fsia.dma_chan = -1;
- master->fsib.dma_chan = -1;
-}
-
/************************************************************************
@@ -435,44 +375,6 @@ static void fsi_soft_all_reset(void)
mdelay(10);
}
-static void fsi_16data_push(struct fsi_priv *fsi,
- struct snd_pcm_runtime *runtime,
- int send)
-{
- u16 *dma_start;
- u32 snd;
- int i;
-
- /* get dma start position for FSI */
- dma_start = (u16 *)runtime->dma_area;
- dma_start += fsi->byte_offset / 2;
-
- /*
- * soft dma
- * FSI can not use DMA when 16bpp
- */
- for (i = 0; i < send; i++) {
- snd = (u32)dma_start[i];
- fsi_reg_write(fsi, DODT, snd << 8);
- }
-}
-
-static void fsi_32data_push(struct fsi_priv *fsi,
- struct snd_pcm_runtime *runtime,
- int send)
-{
- u32 *dma_start;
-
- /* get dma start position for FSI */
- dma_start = (u32 *)runtime->dma_area;
- dma_start += fsi->byte_offset / 4;
-
- dma_wait_for_completion(fsi->dma_chan);
- dma_configure_channel(fsi->dma_chan, (SM_INC|0x400|TS_32|TM_BUR));
- dma_write(fsi->dma_chan, (u32)dma_start,
- (u32)(fsi->base + DODT), send * 4);
-}
-
/* playback interrupt */
static int fsi_data_push(struct fsi_priv *fsi)
{
@@ -481,6 +383,8 @@ static int fsi_data_push(struct fsi_priv *fsi)
int send;
int fifo_free;
int width;
+ u8 *start;
+ int i;
if (!fsi ||
!fsi->substream ||
@@ -515,12 +419,22 @@ static int fsi_data_push(struct fsi_priv *fsi)
if (fifo_free < send)
send = fifo_free;
- if (2 == width)
- fsi_16data_push(fsi, runtime, send);
- else if (4 == width)
- fsi_32data_push(fsi, runtime, send);
- else
+ start = runtime->dma_area;
+ start += fsi->byte_offset;
+
+ switch (width) {
+ case 2:
+ for (i = 0; i < send; i++)
+ fsi_reg_write(fsi, DODT,
+ ((u32)*((u16 *)start + i) << 8));
+ break;
+ case 4:
+ for (i = 0; i < send; i++)
+ fsi_reg_write(fsi, DODT, *((u32 *)start + i));
+ break;
+ default:
return -EINVAL;
+ }
fsi->byte_offset += send * width;
@@ -532,6 +446,75 @@ static int fsi_data_push(struct fsi_priv *fsi)
return 0;
}
+static int fsi_data_pop(struct fsi_priv *fsi)
+{
+ struct snd_pcm_runtime *runtime;
+ struct snd_pcm_substream *substream = NULL;
+ int free;
+ int fifo_fill;
+ int width;
+ u8 *start;
+ int i;
+
+ if (!fsi ||
+ !fsi->substream ||
+ !fsi->substream->runtime)
+ return -EINVAL;
+
+ runtime = fsi->substream->runtime;
+
+ /* FSI FIFO has limit.
+ * So, this driver can not send periods data at a time
+ */
+ if (fsi->byte_offset >=
+ fsi->period_len * (fsi->periods + 1)) {
+
+ substream = fsi->substream;
+ fsi->periods = (fsi->periods + 1) % runtime->periods;
+
+ if (0 == fsi->periods)
+ fsi->byte_offset = 0;
+ }
+
+ /* get 1 channel data width */
+ width = frames_to_bytes(runtime, 1) / fsi->chan;
+
+ /* get free space for alsa */
+ free = (fsi->buffer_len - fsi->byte_offset) / width;
+
+ /* get recv size */
+ fifo_fill = fsi_get_fifo_residue(fsi, 0);
+
+ if (free < fifo_fill)
+ fifo_fill = free;
+
+ start = runtime->dma_area;
+ start += fsi->byte_offset;
+
+ switch (width) {
+ case 2:
+ for (i = 0; i < fifo_fill; i++)
+ *((u16 *)start + i) =
+ (u16)(fsi_reg_read(fsi, DIDT) >> 8);
+ break;
+ case 4:
+ for (i = 0; i < fifo_fill; i++)
+ *((u32 *)start + i) = fsi_reg_read(fsi, DIDT);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ fsi->byte_offset += fifo_fill * width;
+
+ fsi_irq_enable(fsi, 0);
+
+ if (substream)
+ snd_pcm_period_elapsed(substream);
+
+ return 0;
+}
+
static irqreturn_t fsi_interrupt(int irq, void *data)
{
u32 status = fsi_master_read(SOFT_RST) & ~0x00000010;
@@ -545,6 +528,10 @@ static irqreturn_t fsi_interrupt(int irq, void *data)
fsi_data_push(&master->fsia);
if (int_st & INT_B_OUT)
fsi_data_push(&master->fsib);
+ if (int_st & INT_A_IN)
+ fsi_data_pop(&master->fsia);
+ if (int_st & INT_B_IN)
+ fsi_data_pop(&master->fsib);
fsi_master_write(INT_ST, 0x0000000);
@@ -571,7 +558,7 @@ static int fsi_dai_startup(struct snd_pcm_substream *substream,
int is_master;
int ret = 0;
- clk_enable(master->clk);
+ pm_runtime_get_sync(dai->dev);
/* CKG1 */
data = is_play ? (1 << 0) : (1 << 4);
@@ -664,8 +651,6 @@ static int fsi_dai_startup(struct snd_pcm_substream *substream,
}
fsi_reg_write(fsi, reg, data);
- dev_dbg(dai->dev, "use %s format (%d channel) use %d DMAC\n",
- msg, fsi->chan, fsi->dma_chan);
/*
* clear clk reset if master mode
@@ -688,7 +673,7 @@ static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
fsi_irq_disable(fsi, is_play);
fsi_clk_ctrl(fsi, 0);
- clk_disable(master->clk);
+ pm_runtime_put_sync(dai->dev);
}
static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
@@ -699,16 +684,12 @@ static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int ret = 0;
- /* capture not supported */
- if (!is_play)
- return -ENODEV;
-
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
fsi_stream_push(fsi, substream,
frames_to_bytes(runtime, runtime->buffer_size),
frames_to_bytes(runtime, runtime->period_size));
- ret = fsi_data_push(fsi);
+ ret = is_play ? fsi_data_push(fsi) : fsi_data_pop(fsi);
break;
case SNDRV_PCM_TRIGGER_STOP:
fsi_irq_disable(fsi, is_play);
@@ -780,10 +761,9 @@ static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct fsi_priv *fsi = fsi_get(substream);
- int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
long location;
- location = (fsi->byte_offset - 1) - fsi_get_residue(fsi, is_play);
+ location = (fsi->byte_offset - 1);
if (location < 0)
location = 0;
@@ -845,7 +825,12 @@ struct snd_soc_dai fsi_soc_dai[] = {
.channels_min = 1,
.channels_max = 8,
},
- /* capture not supported */
+ .capture = {
+ .rates = FSI_RATES,
+ .formats = FSI_FMTS,
+ .channels_min = 1,
+ .channels_max = 8,
+ },
.ops = &fsi_dai_ops,
},
{
@@ -857,7 +842,12 @@ struct snd_soc_dai fsi_soc_dai[] = {
.channels_min = 1,
.channels_max = 8,
},
- /* capture not supported */
+ .capture = {
+ .rates = FSI_RATES,
+ .formats = FSI_FMTS,
+ .channels_min = 1,
+ .channels_max = 8,
+ },
.ops = &fsi_dai_ops,
},
};
@@ -881,7 +871,6 @@ EXPORT_SYMBOL_GPL(fsi_soc_platform);
static int fsi_probe(struct platform_device *pdev)
{
struct resource *res;
- char clk_name[8];
unsigned int irq;
int ret;
@@ -912,23 +901,8 @@ static int fsi_probe(struct platform_device *pdev)
master->fsia.base = master->base;
master->fsib.base = master->base + 0x40;
- master->fsia.dma_chan = -1;
- master->fsib.dma_chan = -1;
-
- ret = fsi_get_dma_chan();
- if (ret < 0) {
- dev_err(&pdev->dev, "cannot get dma api\n");
- goto exit_iounmap;
- }
-
- /* FSI is based on SPU mstp */
- snprintf(clk_name, sizeof(clk_name), "spu%d", pdev->id);
- master->clk = clk_get(NULL, clk_name);
- if (IS_ERR(master->clk)) {
- dev_err(&pdev->dev, "cannot get %s mstp\n", clk_name);
- ret = -EIO;
- goto exit_free_dma;
- }
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_resume(&pdev->dev);
fsi_soc_dai[0].dev = &pdev->dev;
fsi_soc_dai[1].dev = &pdev->dev;
@@ -938,7 +912,7 @@ static int fsi_probe(struct platform_device *pdev)
ret = request_irq(irq, &fsi_interrupt, IRQF_DISABLED, "fsi", master);
if (ret) {
dev_err(&pdev->dev, "irq request err\n");
- goto exit_free_dma;
+ goto exit_iounmap;
}
ret = snd_soc_register_platform(&fsi_soc_platform);
@@ -951,10 +925,9 @@ static int fsi_probe(struct platform_device *pdev)
exit_free_irq:
free_irq(irq, master);
-exit_free_dma:
- fsi_free_dma_chan();
exit_iounmap:
iounmap(master->base);
+ pm_runtime_disable(&pdev->dev);
exit_kfree:
kfree(master);
master = NULL;
@@ -967,9 +940,7 @@ static int fsi_remove(struct platform_device *pdev)
snd_soc_unregister_dais(fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai));
snd_soc_unregister_platform(&fsi_soc_platform);
- clk_put(master->clk);
-
- fsi_free_dma_chan();
+ pm_runtime_disable(&pdev->dev);
free_irq(master->irq, master);
@@ -979,9 +950,27 @@ static int fsi_remove(struct platform_device *pdev)
return 0;
}
+static int fsi_runtime_nop(struct device *dev)
+{
+ /* Runtime PM callback shared between ->runtime_suspend()
+ * and ->runtime_resume(). Simply returns success.
+ *
+ * This driver re-initializes all registers after
+ * pm_runtime_get_sync() anyway so there is no need
+ * to save and restore registers here.
+ */
+ return 0;
+}
+
+static struct dev_pm_ops fsi_pm_ops = {
+ .runtime_suspend = fsi_runtime_nop,
+ .runtime_resume = fsi_runtime_nop,
+};
+
static struct platform_driver fsi_driver = {
.driver = {
.name = "sh_fsi",
+ .pm = &fsi_pm_ops,
},
.probe = fsi_probe,
.remove = fsi_remove,