1 files changed, 130 insertions, 141 deletions

diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c
index 44123248b630..9c49c11c43ce 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,