1 files changed, 90 insertions, 72 deletions

diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index 73cb6b4c2f2d..308a657928d2 100644
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -1,4 +1,3 @@
-#define DEBUG
 /*
  * pxa-ssp.c  --  ALSA Soc Audio Layer
  *
@@ -21,6 +20,8 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 
+#include <asm/irq.h>
+
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/initval.h>
@@ -29,7 +30,7 @@
 #include <sound/pxa2xx-lib.h>
 
 #include <mach/hardware.h>
-#include <mach/pxa-regs.h>
+#include <mach/dma.h>
 #include <mach/regs-ssp.h>
 #include <mach/audio.h>
 #include <mach/ssp.h>
@@ -221,9 +222,9 @@ static int pxa_ssp_startup(struct snd_pcm_substream *substream,
         int ret = 0;
 
         if (!cpu_dai->active) {
-                ret = ssp_init(&priv->dev, cpu_dai->id + 1, SSP_NO_IRQ);
-                if (ret < 0)
-                        return ret;
+                priv->dev.port = cpu_dai->id + 1;
+                priv->dev.irq = NO_IRQ;
+                clk_enable(priv->dev.ssp->clk);
                 ssp_disable(&priv->dev);
         }
         return ret;
@@ -238,7 +239,7 @@ static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
 
         if (!cpu_dai->active) {
                 ssp_disable(&priv->dev);
-                ssp_exit(&priv->dev);
+                clk_disable(priv->dev.ssp->clk);
         }
 }
 
@@ -298,7 +299,7 @@ static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
         int val;
 
         u32 sscr0 = ssp_read_reg(ssp, SSCR0) &
-                ~(SSCR0_ECS |  SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
+                ~(SSCR0_ECS |  SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
 
         dev_dbg(&ssp->pdev->dev,
                 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %d\n",
@@ -326,7 +327,7 @@ static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
         case PXA_SSP_CLK_AUDIO:
                 priv->sysclk = 0;
                 ssp_set_scr(&priv->dev, 1);
-                sscr0 |= SSCR0_ADC;
+                sscr0 |= SSCR0_ACS;
                 break;
         default:
                 return -ENODEV;
@@ -520,9 +521,20 @@ static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
         u32 sscr1;
         u32 sspsp;
 
+        /* check if we need to change anything at all */
+        if (priv->dai_fmt == fmt)
+                return 0;
+
+        /* we can only change the settings if the port is not in use */
+        if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
+                dev_err(&ssp->pdev->dev,
+                        "can't change hardware dai format: stream is in use");
+                return -EINVAL;
+        }
+
         /* reset port settings */
         sscr0 = ssp_read_reg(ssp, SSCR0) &
-                (SSCR0_ECS |  SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
+                (SSCR0_ECS |  SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
         sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
         sspsp = 0;
 
@@ -545,18 +557,18 @@ static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 
         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
         case SND_SOC_DAIFMT_I2S:
-                sscr0 |= SSCR0_MOD | SSCR0_PSP;
+                sscr0 |= SSCR0_PSP;
                 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
 
+                /* See hw_params() */
                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
                 case SND_SOC_DAIFMT_NB_NF:
-                        sspsp |= SSPSP_FSRT;
+                        sspsp |= SSPSP_SFRMP;
                         break;
                 case SND_SOC_DAIFMT_NB_IF:
-                        sspsp |= SSPSP_SFRMP | SSPSP_FSRT;
                         break;
                 case SND_SOC_DAIFMT_IB_IF:
-                        sspsp |= SSPSP_SFRMP;
+                        sspsp |= SSPSP_SCMODE(3);
                         break;
                 default:
                         return -EINVAL;
@@ -615,12 +627,18 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
         u32 sscr0;
         u32 sspsp;
         int width = snd_pcm_format_physical_width(params_format(params));
+        int ttsa = ssp_read_reg(ssp, SSTSA) & 0xf;
 
         /* select correct DMA params */
         if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
                 dma = 1; /* capture DMA offset is 1,3 */
-        if (chn == 2)
-                dma += 2; /* stereo DMA offset is 2, mono is 0 */
+        /* Network mode with one active slot (ttsa == 1) can be used
+         * to force 16-bit frame width on the wire (for S16_LE), even
+         * with two channels. Use 16-bit DMA transfers for this case.
+         */
+        if (((chn == 2) && (ttsa != 1)) || (width == 32))
+                dma += 2; /* 32-bit DMA offset is 2, 16-bit is 0 */
+
         cpu_dai->dma_data = ssp_dma_params[cpu_dai->id][dma];
 
         dev_dbg(&ssp->pdev->dev, "pxa_ssp_hw_params: dma %d\n", dma);
@@ -642,34 +660,65 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
                         sscr0 |= SSCR0_FPCKE;
 #endif
                 sscr0 |= SSCR0_DataSize(16);
-                if (params_channels(params) > 1)
-                        sscr0 |= SSCR0_EDSS;
                 break;
         case SNDRV_PCM_FORMAT_S24_LE:
                 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
-                /* we must be in network mode (2 slots) for 24 bit stereo */
                 break;
         case SNDRV_PCM_FORMAT_S32_LE:
                 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
-                /* we must be in network mode (2 slots) for 32 bit stereo */
                 break;
         }
         ssp_write_reg(ssp, SSCR0, sscr0);
 
         switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
         case SND_SOC_DAIFMT_I2S:
-                /* Cleared when the DAI format is set */
-                sspsp = ssp_read_reg(ssp, SSPSP) | SSPSP_SFRMWDTH(width);
+               sspsp = ssp_read_reg(ssp, SSPSP);
+
+                if (((sscr0 & SSCR0_SCR) == SSCR0_SerClkDiv(4)) &&
+                     (width == 16)) {
+                        /* This is a special case where the bitclk is 64fs
+                        * and we're not dealing with 2*32 bits of audio
+                        * samples.
+                        *
+                        * The SSP values used for that are all found out by
+                        * trying and failing a lot; some of the registers
+                        * needed for that mode are only available on PXA3xx.
+                        */
+
+#ifdef CONFIG_PXA3xx
+                        if (!cpu_is_pxa3xx())
+                                return -EINVAL;
+
+                        sspsp |= SSPSP_SFRMWDTH(width * 2);
+                        sspsp |= SSPSP_SFRMDLY(width * 4);
+                        sspsp |= SSPSP_EDMYSTOP(3);
+                        sspsp |= SSPSP_DMYSTOP(3);
+                        sspsp |= SSPSP_DMYSTRT(1);
+#else
+                        return -EINVAL;
+#endif
+                } else {
+                        /* The frame width is the width the LRCLK is
+                         * asserted for; the delay is expressed in
+                         * half cycle units.  We need the extra cycle
+                         * because the data starts clocking out one BCLK
+                         * after LRCLK changes polarity.
+                         */
+                        sspsp |= SSPSP_SFRMWDTH(width + 1);
+                        sspsp |= SSPSP_SFRMDLY((width + 1) * 2);
+                        sspsp |= SSPSP_DMYSTRT(1);
+                }
+
                 ssp_write_reg(ssp, SSPSP, sspsp);
                 break;
         default:
                 break;
         }
 
-        /* We always use a network mode so we always require TDM slots
+        /* When we use a network mode, we always require TDM slots
          * - complain loudly and fail if they've not been set up yet.
          */
-        if (!(ssp_read_reg(ssp, SSTSA) & 0xf)) {
+        if ((sscr0 & SSCR0_MOD) && !ttsa) {
                 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
                 return -EINVAL;
         }
@@ -751,7 +800,7 @@ static int pxa_ssp_probe(struct platform_device *pdev,
         if (!priv)
                 return -ENOMEM;
 
-        priv->dev.ssp = ssp_request(dai->id, "SoC audio");
+        priv->dev.ssp = ssp_request(dai->id + 1, "SoC audio");
         if (priv->dev.ssp == NULL) {
                 ret = -ENODEV;
                 goto err_priv;
@@ -782,6 +831,19 @@ static void pxa_ssp_remove(struct platform_device *pdev,
                             SNDRV_PCM_FMTBIT_S24_LE |   \
                             SNDRV_PCM_FMTBIT_S32_LE)
 
+static struct snd_soc_dai_ops pxa_ssp_dai_ops = {
+        .startup        = pxa_ssp_startup,
+        .shutdown       = pxa_ssp_shutdown,
+        .trigger        = pxa_ssp_trigger,
+        .hw_params      = pxa_ssp_hw_params,
+        .set_sysclk     = pxa_ssp_set_dai_sysclk,
+        .set_clkdiv     = pxa_ssp_set_dai_clkdiv,
+        .set_pll        = pxa_ssp_set_dai_pll,
+        .set_fmt        = pxa_ssp_set_dai_fmt,
+        .set_tdm_slot   = pxa_ssp_set_dai_tdm_slot,
+        .set_tristate   = pxa_ssp_set_dai_tristate,
+};
+
 struct snd_soc_dai pxa_ssp_dai[] = {
         {
                 .name = "pxa2xx-ssp1",
@@ -802,18 +864,7 @@ struct snd_soc_dai pxa_ssp_dai[] = {
                         .rates = PXA_SSP_RATES,
                         .formats = PXA_SSP_FORMATS,
                  },
-                .ops = {
-                        .startup = pxa_ssp_startup,
-                        .shutdown = pxa_ssp_shutdown,
-                        .trigger = pxa_ssp_trigger,
-                        .hw_params = pxa_ssp_hw_params,
-                        .set_sysclk = pxa_ssp_set_dai_sysclk,
-                        .set_clkdiv = pxa_ssp_set_dai_clkdiv,
-                        .set_pll = pxa_ssp_set_dai_pll,
-                        .set_fmt = pxa_ssp_set_dai_fmt,
-                        .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
-                        .set_tristate = pxa_ssp_set_dai_tristate,
-                },
+                .ops = &pxa_ssp_dai_ops,
         },
         {       .name = "pxa2xx-ssp2",
                 .id = 1,
@@ -833,18 +884,7 @@ struct snd_soc_dai pxa_ssp_dai[] = {
                         .rates = PXA_SSP_RATES,
                         .formats = PXA_SSP_FORMATS,
                  },
-                .ops = {
-                        .startup = pxa_ssp_startup,
-                        .shutdown = pxa_ssp_shutdown,
-                        .trigger = pxa_ssp_trigger,
-                        .hw_params = pxa_ssp_hw_params,
-                        .set_sysclk = pxa_ssp_set_dai_sysclk,
-                        .set_clkdiv = pxa_ssp_set_dai_clkdiv,
-                        .set_pll = pxa_ssp_set_dai_pll,
-                        .set_fmt = pxa_ssp_set_dai_fmt,
-                        .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
-                        .set_tristate = pxa_ssp_set_dai_tristate,
-                },
+                .ops = &pxa_ssp_dai_ops,
         },
         {
                 .name = "pxa2xx-ssp3",
@@ -865,18 +905,7 @@ struct snd_soc_dai pxa_ssp_dai[] = {
                         .rates = PXA_SSP_RATES,
                         .formats = PXA_SSP_FORMATS,
                  },
-                .ops = {
-                        .startup = pxa_ssp_startup,
-                        .shutdown = pxa_ssp_shutdown,
-                        .trigger = pxa_ssp_trigger,
-                        .hw_params = pxa_ssp_hw_params,
-                        .set_sysclk = pxa_ssp_set_dai_sysclk,
-                        .set_clkdiv = pxa_ssp_set_dai_clkdiv,
-                        .set_pll = pxa_ssp_set_dai_pll,
-                        .set_fmt = pxa_ssp_set_dai_fmt,
-                        .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
-                        .set_tristate = pxa_ssp_set_dai_tristate,
-                },
+                .ops = &pxa_ssp_dai_ops,
         },
         {
                 .name = "pxa2xx-ssp4",
@@ -897,18 +926,7 @@ struct snd_soc_dai pxa_ssp_dai[] = {
                         .rates = PXA_SSP_RATES,
                         .formats = PXA_SSP_FORMATS,
                  },
-                .ops = {
-                        .startup = pxa_ssp_startup,
-                        .shutdown = pxa_ssp_shutdown,
-                        .trigger = pxa_ssp_trigger,
-                        .hw_params = pxa_ssp_hw_params,
-                        .set_sysclk = pxa_ssp_set_dai_sysclk,
-                        .set_clkdiv = pxa_ssp_set_dai_clkdiv,
-                        .set_pll = pxa_ssp_set_dai_pll,
-                        .set_fmt = pxa_ssp_set_dai_fmt,
-                        .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
-                        .set_tristate = pxa_ssp_set_dai_tristate,
-                },
+                .ops = &pxa_ssp_dai_ops,
         },
 };
 EXPORT_SYMBOL_GPL(pxa_ssp_dai);