ASoC: Add PXA SSP support
authorMark Brown <broonie@opensource.wolfsonmicro.com>
Wed, 30 Jul 2008 18:12:04 +0000 (19:12 +0100)
committerMark Brown <broonie@opensource.wolfsonmicro.com>
Thu, 30 Oct 2008 15:45:21 +0000 (15:45 +0000)
The SSP ports PXA series processors can be used to implement a variety of
audio interface formats. This patch implements support for I2S, DSP A and
DSP B modes on these ports.

This patch is based on the previous out of tree pxa2xx-ssp driver (which
was originally written by Liam Girdwood with updates from Philipp Zabel
and Nicola Perrino) and pxa3xx-ssp driver (originally written by Seth
Forsee based on the pxa2xx-ssp driver). Testing coverage is not complete
currently.

Tested-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
sound/soc/pxa/Kconfig
sound/soc/pxa/Makefile
sound/soc/pxa/pxa-ssp.c [new file with mode: 0644]
sound/soc/pxa/pxa-ssp.h [new file with mode: 0644]

index f8c1cdd940acf54330c05fed9c69a3f4f7c7b0e6..4235524238f997f20cd3ae8fd733050338d681aa 100644 (file)
@@ -21,6 +21,9 @@ config SND_PXA2XX_SOC_AC97
 config SND_PXA2XX_SOC_I2S
        tristate
 
+config SND_PXA_SOC_SSP
+       tristate
+
 config SND_PXA2XX_SOC_CORGI
        tristate "SoC Audio support for Sharp Zaurus SL-C7x0"
        depends on SND_PXA2XX_SOC && PXA_SHARP_C7xx
@@ -75,3 +78,13 @@ config SND_PXA2XX_SOC_EM_X270
        help
          Say Y if you want to add support for SoC audio on
          CompuLab EM-x270.
+
+config SND_SOC_ZYLONITE
+       tristate "SoC Audio support for Marvell Zylonite"
+       depends on SND_PXA2XX_SOC && MACH_ZYLONITE
+       select SND_PXA2XX_SOC_AC97
+       select SND_PXA_SOC_SSP
+       select SND_SOC_WM9713
+       help
+         Say Y if you want to add support for SoC audio on the
+         Marvell Zylonite reference platform.
index 5bc8edf9dca9ec8532ec6e56e1c7e7ea88f463fc..00258abb84a88a2bc6aa558de2e7b1550fb08f07 100644 (file)
@@ -2,10 +2,12 @@
 snd-soc-pxa2xx-objs := pxa2xx-pcm.o
 snd-soc-pxa2xx-ac97-objs := pxa2xx-ac97.o
 snd-soc-pxa2xx-i2s-objs := pxa2xx-i2s.o
+snd-soc-pxa-ssp-objs := pxa-ssp.o
 
 obj-$(CONFIG_SND_PXA2XX_SOC) += snd-soc-pxa2xx.o
 obj-$(CONFIG_SND_PXA2XX_SOC_AC97) += snd-soc-pxa2xx-ac97.o
 obj-$(CONFIG_SND_PXA2XX_SOC_I2S) += snd-soc-pxa2xx-i2s.o
+obj-$(CONFIG_SND_PXA_SOC_SSP) += snd-soc-pxa-ssp.o
 
 # PXA Machine Support
 snd-soc-corgi-objs := corgi.o
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
new file mode 100644 (file)
index 0000000..e2b54b8
--- /dev/null
@@ -0,0 +1,929 @@
+#define DEBUG
+/*
+ * pxa-ssp.c  --  ALSA Soc Audio Layer
+ *
+ * Copyright 2005,2008 Wolfson Microelectronics PLC.
+ * Author: Liam Girdwood
+ *         Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ * TODO:
+ *  o Test network mode for > 16bit sample size
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/pxa2xx-lib.h>
+
+#include <mach/hardware.h>
+#include <mach/pxa-regs.h>
+#include <mach/regs-ssp.h>
+#include <mach/audio.h>
+#include <mach/ssp.h>
+
+#include "pxa2xx-pcm.h"
+#include "pxa-ssp.h"
+
+/*
+ * SSP audio private data
+ */
+struct ssp_priv {
+       struct ssp_dev dev;
+       unsigned int sysclk;
+       int dai_fmt;
+#ifdef CONFIG_PM
+       struct ssp_state state;
+#endif
+};
+
+#define PXA2xx_SSP1_BASE       0x41000000
+#define PXA27x_SSP2_BASE       0x41700000
+#define PXA27x_SSP3_BASE       0x41900000
+#define PXA3xx_SSP4_BASE       0x41a00000
+
+static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_mono_out = {
+       .name                   = "SSP1 PCM Mono out",
+       .dev_addr               = PXA2xx_SSP1_BASE + SSDR,
+       .drcmr                  = &DRCMR(14),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_mono_in = {
+       .name                   = "SSP1 PCM Mono in",
+       .dev_addr               = PXA2xx_SSP1_BASE + SSDR,
+       .drcmr                  = &DRCMR(13),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_stereo_out = {
+       .name                   = "SSP1 PCM Stereo out",
+       .dev_addr               = PXA2xx_SSP1_BASE + SSDR,
+       .drcmr                  = &DRCMR(14),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_stereo_in = {
+       .name                   = "SSP1 PCM Stereo in",
+       .dev_addr               = PXA2xx_SSP1_BASE + SSDR,
+       .drcmr                  = &DRCMR(13),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_mono_out = {
+       .name                   = "SSP2 PCM Mono out",
+       .dev_addr               = PXA27x_SSP2_BASE + SSDR,
+       .drcmr                  = &DRCMR(16),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_mono_in = {
+       .name                   = "SSP2 PCM Mono in",
+       .dev_addr               = PXA27x_SSP2_BASE + SSDR,
+       .drcmr                  = &DRCMR(15),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_stereo_out = {
+       .name                   = "SSP2 PCM Stereo out",
+       .dev_addr               = PXA27x_SSP2_BASE + SSDR,
+       .drcmr                  = &DRCMR(16),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_stereo_in = {
+       .name                   = "SSP2 PCM Stereo in",
+       .dev_addr               = PXA27x_SSP2_BASE + SSDR,
+       .drcmr                  = &DRCMR(15),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_mono_out = {
+       .name                   = "SSP3 PCM Mono out",
+       .dev_addr               = PXA27x_SSP3_BASE + SSDR,
+       .drcmr                  = &DRCMR(67),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_mono_in = {
+       .name                   = "SSP3 PCM Mono in",
+       .dev_addr               = PXA27x_SSP3_BASE + SSDR,
+       .drcmr                  = &DRCMR(66),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_stereo_out = {
+       .name                   = "SSP3 PCM Stereo out",
+       .dev_addr               = PXA27x_SSP3_BASE + SSDR,
+       .drcmr                  = &DRCMR(67),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_stereo_in = {
+       .name                   = "SSP3 PCM Stereo in",
+       .dev_addr               = PXA27x_SSP3_BASE + SSDR,
+       .drcmr                  = &DRCMR(66),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_mono_out = {
+       .name                   = "SSP4 PCM Mono out",
+       .dev_addr               = PXA3xx_SSP4_BASE + SSDR,
+       .drcmr                  = &DRCMR(67),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_mono_in = {
+       .name                   = "SSP4 PCM Mono in",
+       .dev_addr               = PXA3xx_SSP4_BASE + SSDR,
+       .drcmr                  = &DRCMR(66),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH2,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_stereo_out = {
+       .name                   = "SSP4 PCM Stereo out",
+       .dev_addr               = PXA3xx_SSP4_BASE + SSDR,
+       .drcmr                  = &DRCMR(67),
+       .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_stereo_in = {
+       .name                   = "SSP4 PCM Stereo in",
+       .dev_addr               = PXA3xx_SSP4_BASE + SSDR,
+       .drcmr                  = &DRCMR(66),
+       .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
+                                 DCMD_BURST16 | DCMD_WIDTH4,
+};
+
+static void dump_registers(struct ssp_device *ssp)
+{
+       dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
+                ssp_read_reg(ssp, SSCR0), ssp_read_reg(ssp, SSCR1),
+                ssp_read_reg(ssp, SSTO));
+
+       dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
+                ssp_read_reg(ssp, SSPSP), ssp_read_reg(ssp, SSSR),
+                ssp_read_reg(ssp, SSACD));
+}
+
+static struct pxa2xx_pcm_dma_params *ssp_dma_params[4][4] = {
+       {
+               &pxa_ssp1_pcm_mono_out, &pxa_ssp1_pcm_mono_in,
+               &pxa_ssp1_pcm_stereo_out, &pxa_ssp1_pcm_stereo_in,
+       },
+       {
+               &pxa_ssp2_pcm_mono_out, &pxa_ssp2_pcm_mono_in,
+               &pxa_ssp2_pcm_stereo_out, &pxa_ssp2_pcm_stereo_in,
+       },
+       {
+               &pxa_ssp3_pcm_mono_out, &pxa_ssp3_pcm_mono_in,
+               &pxa_ssp3_pcm_stereo_out, &pxa_ssp3_pcm_stereo_in,
+       },
+       {
+               &pxa_ssp4_pcm_mono_out, &pxa_ssp4_pcm_mono_in,
+               &pxa_ssp4_pcm_stereo_out, &pxa_ssp4_pcm_stereo_in,
+       },
+};
+
+static int pxa_ssp_startup(struct snd_pcm_substream *substream)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+       struct ssp_priv *priv = cpu_dai->private_data;
+       int ret = 0;
+
+       if (!cpu_dai->active) {
+               ret = ssp_init(&priv->dev, cpu_dai->id + 1, SSP_NO_IRQ);
+               if (ret < 0)
+                       return ret;
+               ssp_disable(&priv->dev);
+       }
+       return ret;
+}
+
+static void pxa_ssp_shutdown(struct snd_pcm_substream *substream)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+       struct ssp_priv *priv = cpu_dai->private_data;
+
+       if (!cpu_dai->active) {
+               ssp_disable(&priv->dev);
+               ssp_exit(&priv->dev);
+       }
+}
+
+#ifdef CONFIG_PM
+
+static int pxa_ssp_suspend(struct platform_device *pdev,
+       struct snd_soc_dai *cpu_dai)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+
+       if (!cpu_dai->active)
+               return 0;
+
+       ssp_save_state(&priv->dev, &priv->state);
+       clk_disable(priv->dev.ssp->clk);
+       return 0;
+}
+
+static int pxa_ssp_resume(struct platform_device *pdev,
+       struct snd_soc_dai *cpu_dai)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+
+       if (!cpu_dai->active)
+               return 0;
+
+       clk_enable(priv->dev.ssp->clk);
+       ssp_restore_state(&priv->dev, &priv->state);
+       ssp_enable(&priv->dev);
+
+       return 0;
+}
+
+#else
+#define pxa_ssp_suspend        NULL
+#define pxa_ssp_resume NULL
+#endif
+
+/**
+ * ssp_set_clkdiv - set SSP clock divider
+ * @div: serial clock rate divider
+ */
+static void ssp_set_scr(struct ssp_dev *dev, u32 div)
+{
+       struct ssp_device *ssp = dev->ssp;
+       u32 sscr0 = ssp_read_reg(dev->ssp, SSCR0) & ~SSCR0_SCR;
+
+       ssp_write_reg(ssp, SSCR0, (sscr0 | SSCR0_SerClkDiv(div)));
+}
+
+/*
+ * Set the SSP ports SYSCLK.
+ */
+static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
+       int clk_id, unsigned int freq, int dir)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       int val;
+
+       u32 sscr0 = ssp_read_reg(ssp, SSCR0) &
+               ~(SSCR0_ECS |  SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
+
+       dev_dbg(&ssp->pdev->dev,
+               "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %d\n",
+               cpu_dai->id, clk_id, freq);
+
+       switch (clk_id) {
+       case PXA_SSP_CLK_NET_PLL:
+               sscr0 |= SSCR0_MOD;
+               break;
+       case PXA_SSP_CLK_PLL:
+               /* Internal PLL is fixed */
+               if (cpu_is_pxa25x())
+                       priv->sysclk = 1843200;
+               else
+                       priv->sysclk = 13000000;
+               break;
+       case PXA_SSP_CLK_EXT:
+               priv->sysclk = freq;
+               sscr0 |= SSCR0_ECS;
+               break;
+       case PXA_SSP_CLK_NET:
+               priv->sysclk = freq;
+               sscr0 |= SSCR0_NCS | SSCR0_MOD;
+               break;
+       case PXA_SSP_CLK_AUDIO:
+               priv->sysclk = 0;
+               ssp_set_scr(&priv->dev, 1);
+               sscr0 |= SSCR0_ADC;
+               break;
+       default:
+               return -ENODEV;
+       }
+
+       /* The SSP clock must be disabled when changing SSP clock mode
+        * on PXA2xx.  On PXA3xx it must be enabled when doing so. */
+       if (!cpu_is_pxa3xx())
+               clk_disable(priv->dev.ssp->clk);
+       val = ssp_read_reg(ssp, SSCR0) | sscr0;
+       ssp_write_reg(ssp, SSCR0, val);
+       if (!cpu_is_pxa3xx())
+               clk_enable(priv->dev.ssp->clk);
+
+       return 0;
+}
+
+/*
+ * Set the SSP clock dividers.
+ */
+static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
+       int div_id, int div)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       int val;
+
+       switch (div_id) {
+       case PXA_SSP_AUDIO_DIV_ACDS:
+               val = (ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
+               ssp_write_reg(ssp, SSACD, val);
+               break;
+       case PXA_SSP_AUDIO_DIV_SCDB:
+               val = ssp_read_reg(ssp, SSACD);
+               val &= ~SSACD_SCDB;
+#if defined(CONFIG_PXA3xx)
+               if (cpu_is_pxa3xx())
+                       val &= ~SSACD_SCDX8;
+#endif
+               switch (div) {
+               case PXA_SSP_CLK_SCDB_1:
+                       val |= SSACD_SCDB;
+                       break;
+               case PXA_SSP_CLK_SCDB_4:
+                       break;
+#if defined(CONFIG_PXA3xx)
+               case PXA_SSP_CLK_SCDB_8:
+                       if (cpu_is_pxa3xx())
+                               val |= SSACD_SCDX8;
+                       else
+                               return -EINVAL;
+                       break;
+#endif
+               default:
+                       return -EINVAL;
+               }
+               ssp_write_reg(ssp, SSACD, val);
+               break;
+       case PXA_SSP_DIV_SCR:
+               ssp_set_scr(&priv->dev, div);
+               break;
+       default:
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+/*
+ * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
+ */
+static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai,
+       int pll_id, unsigned int freq_in, unsigned int freq_out)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       u32 ssacd = ssp_read_reg(ssp, SSACD) & ~0x70;
+
+#if defined(CONFIG_PXA3xx)
+       if (cpu_is_pxa3xx())
+               ssp_write_reg(ssp, SSACDD, 0);
+#endif
+
+       switch (freq_out) {
+       case 5622000:
+               break;
+       case 11345000:
+               ssacd |= (0x1 << 4);
+               break;
+       case 12235000:
+               ssacd |= (0x2 << 4);
+               break;
+       case 14857000:
+               ssacd |= (0x3 << 4);
+               break;
+       case 32842000:
+               ssacd |= (0x4 << 4);
+               break;
+       case 48000000:
+               ssacd |= (0x5 << 4);
+               break;
+       case 0:
+               /* Disable */
+               break;
+
+       default:
+#ifdef CONFIG_PXA3xx
+               /* PXA3xx has a clock ditherer which can be used to generate
+                * a wider range of frequencies - calculate a value for it.
+                */
+               if (cpu_is_pxa3xx()) {
+                       u32 val;
+                       u64 tmp = 19968;
+                       tmp *= 1000000;
+                       do_div(tmp, freq_out);
+                       val = tmp;
+
+                       val = (val << 16) | 64;;
+                       ssp_write_reg(ssp, SSACDD, val);
+
+                       ssacd |= (0x6 << 4);
+
+                       dev_dbg(&ssp->pdev->dev,
+                               "Using SSACDD %x to supply %dHz\n",
+                               val, freq_out);
+                       break;
+               }
+#endif
+
+               return -EINVAL;
+       }
+
+       ssp_write_reg(ssp, SSACD, ssacd);
+
+       return 0;
+}
+
+/*
+ * Set the active slots in TDM/Network mode
+ */
+static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
+       unsigned int mask, int slots)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       u32 sscr0;
+
+       sscr0 = ssp_read_reg(ssp, SSCR0) & ~SSCR0_SlotsPerFrm(7);
+
+       /* set number of active slots */
+       sscr0 |= SSCR0_SlotsPerFrm(slots);
+       ssp_write_reg(ssp, SSCR0, sscr0);
+
+       /* set active slot mask */
+       ssp_write_reg(ssp, SSTSA, mask);
+       ssp_write_reg(ssp, SSRSA, mask);
+       return 0;
+}
+
+/*
+ * Tristate the SSP DAI lines
+ */
+static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
+       int tristate)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       u32 sscr1;
+
+       sscr1 = ssp_read_reg(ssp, SSCR1);
+       if (tristate)
+               sscr1 &= ~SSCR1_TTE;
+       else
+               sscr1 |= SSCR1_TTE;
+       ssp_write_reg(ssp, SSCR1, sscr1);
+
+       return 0;
+}
+
+/*
+ * Set up the SSP DAI format.
+ * The SSP Port must be inactive before calling this function as the
+ * physical interface format is changed.
+ */
+static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+               unsigned int fmt)
+{
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       u32 sscr0;
+       u32 sscr1;
+       u32 sspsp;
+
+       /* reset port settings */
+       sscr0 = ssp_read_reg(ssp, SSCR0) &
+               (SSCR0_ECS |  SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
+       sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
+       sspsp = 0;
+
+       switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+       case SND_SOC_DAIFMT_CBM_CFM:
+               sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR;
+               break;
+       case SND_SOC_DAIFMT_CBM_CFS:
+               sscr1 |= SSCR1_SCLKDIR;
+               break;
+       case SND_SOC_DAIFMT_CBS_CFS:
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       ssp_write_reg(ssp, SSCR0, sscr0);
+       ssp_write_reg(ssp, SSCR1, sscr1);
+       ssp_write_reg(ssp, SSPSP, sspsp);
+
+       switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+       case SND_SOC_DAIFMT_I2S:
+               sscr0 |= SSCR0_MOD | SSCR0_PSP;
+               sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
+
+               switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+               case SND_SOC_DAIFMT_NB_NF:
+                       sspsp |= SSPSP_FSRT;
+                       break;
+               case SND_SOC_DAIFMT_NB_IF:
+                       sspsp |= SSPSP_SFRMP | SSPSP_FSRT;
+                       break;
+               case SND_SOC_DAIFMT_IB_IF:
+                       sspsp |= SSPSP_SFRMP;
+                       break;
+               default:
+                       return -EINVAL;
+               }
+               break;
+
+       case SND_SOC_DAIFMT_DSP_A:
+               sspsp |= SSPSP_FSRT;
+       case SND_SOC_DAIFMT_DSP_B:
+               sscr0 |= SSCR0_MOD | SSCR0_PSP;
+               sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
+
+               switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+               case SND_SOC_DAIFMT_NB_NF:
+                       sspsp |= SSPSP_SFRMP;
+                       break;
+               case SND_SOC_DAIFMT_IB_IF:
+                       break;
+               default:
+                       return -EINVAL;
+               }
+               break;
+
+       default:
+               return -EINVAL;
+       }
+
+       ssp_write_reg(ssp, SSCR0, sscr0);
+       ssp_write_reg(ssp, SSCR1, sscr1);
+       ssp_write_reg(ssp, SSPSP, sspsp);
+
+       dump_registers(ssp);
+
+       /* Since we are configuring the timings for the format by hand
+        * we have to defer some things until hw_params() where we
+        * know parameters like the sample size.
+        */
+       priv->dai_fmt = fmt;
+
+       return 0;
+}
+
+/*
+ * Set the SSP audio DMA parameters and sample size.
+ * Can be called multiple times by oss emulation.
+ */
+static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
+                               struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       int dma = 0, chn = params_channels(params);
+       u32 sscr0;
+       u32 sspsp;
+       int width = snd_pcm_format_physical_width(params_format(params));
+
+       /* 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 */
+       cpu_dai->dma_data = ssp_dma_params[cpu_dai->id][dma];
+
+       dev_dbg(&ssp->pdev->dev, "pxa_ssp_hw_params: dma %d\n", dma);
+
+       /* we can only change the settings if the port is not in use */
+       if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
+               return 0;
+
+       /* clear selected SSP bits */
+       sscr0 = ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
+       ssp_write_reg(ssp, SSCR0, sscr0);
+
+       /* bit size */
+       sscr0 = ssp_read_reg(ssp, SSCR0);
+       switch (params_format(params)) {
+       case SNDRV_PCM_FORMAT_S16_LE:
+#ifdef CONFIG_PXA3xx
+               if (cpu_is_pxa3xx())
+                       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);
+               ssp_write_reg(ssp, SSPSP, sspsp);
+               break;
+       default:
+               break;
+       }
+
+       /* We always use a network mode so we always require TDM slots
+        * - complain loudly and fail if they've not been set up yet.
+        */
+       if (!(ssp_read_reg(ssp, SSTSA) & 0xf)) {
+               dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
+               return -EINVAL;
+       }
+
+       dump_registers(ssp);
+
+       return 0;
+}
+
+static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+       int ret = 0;
+       struct ssp_priv *priv = cpu_dai->private_data;
+       struct ssp_device *ssp = priv->dev.ssp;
+       int val;
+
+       switch (cmd) {
+       case SNDRV_PCM_TRIGGER_RESUME:
+               ssp_enable(&priv->dev);
+               break;
+       case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+               val = ssp_read_reg(ssp, SSCR1);
+               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                       val |= SSCR1_TSRE;
+               else
+                       val |= SSCR1_RSRE;
+               ssp_write_reg(ssp, SSCR1, val);
+               val = ssp_read_reg(ssp, SSSR);
+               ssp_write_reg(ssp, SSSR, val);
+               break;
+       case SNDRV_PCM_TRIGGER_START:
+               val = ssp_read_reg(ssp, SSCR1);
+               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                       val |= SSCR1_TSRE;
+               else
+                       val |= SSCR1_RSRE;
+               ssp_write_reg(ssp, SSCR1, val);
+               ssp_enable(&priv->dev);
+               break;
+       case SNDRV_PCM_TRIGGER_STOP:
+               val = ssp_read_reg(ssp, SSCR1);
+               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                       val &= ~SSCR1_TSRE;
+               else
+                       val &= ~SSCR1_RSRE;
+               ssp_write_reg(ssp, SSCR1, val);
+               break;
+       case SNDRV_PCM_TRIGGER_SUSPEND:
+               ssp_disable(&priv->dev);
+               break;
+       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+               val = ssp_read_reg(ssp, SSCR1);
+               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                       val &= ~SSCR1_TSRE;
+               else
+                       val &= ~SSCR1_RSRE;
+               ssp_write_reg(ssp, SSCR1, val);
+               break;
+
+       default:
+               ret = -EINVAL;
+       }
+
+       dump_registers(ssp);
+
+       return ret;
+}
+
+static int pxa_ssp_probe(struct platform_device *pdev,
+                           struct snd_soc_dai *dai)
+{
+       struct ssp_priv *priv;
+       int ret;
+
+       priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
+       if (!priv)
+               return -ENOMEM;
+
+       priv->dev.ssp = ssp_request(dai->id, "SoC audio");
+       if (priv->dev.ssp == NULL) {
+               ret = -ENODEV;
+               goto err_priv;
+       }
+
+       dai->private_data = priv;
+
+       return 0;
+
+err_priv:
+       kfree(priv);
+       return ret;
+}
+
+static void pxa_ssp_remove(struct platform_device *pdev,
+                             struct snd_soc_dai *dai)
+{
+       struct ssp_priv *priv = dai->private_data;
+       ssp_free(priv->dev.ssp);
+}
+
+#define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+                         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
+                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
+                         SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+
+#define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
+                           SNDRV_PCM_FMTBIT_S24_LE |   \
+                           SNDRV_PCM_FMTBIT_S32_LE)
+
+struct snd_soc_dai pxa_ssp_dai[] = {
+       {
+               .name = "pxa2xx-ssp1",
+               .id = 0,
+               .type = SND_SOC_DAI_PCM,
+               .probe = pxa_ssp_probe,
+               .remove = pxa_ssp_remove,
+               .suspend = pxa_ssp_suspend,
+               .resume = pxa_ssp_resume,
+               .playback = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .rates = PXA_SSP_RATES,
+                       .formats = PXA_SSP_FORMATS,
+               },
+               .capture = {
+                        .channels_min = 1,
+                        .channels_max = 2,
+                       .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,
+                },
+               .dai_ops = {
+                       .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,
+               },
+       },
+       {       .name = "pxa2xx-ssp2",
+               .id = 1,
+               .type = SND_SOC_DAI_PCM,
+               .probe = pxa_ssp_probe,
+               .remove = pxa_ssp_remove,
+               .suspend = pxa_ssp_suspend,
+               .resume = pxa_ssp_resume,
+               .playback = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .rates = PXA_SSP_RATES,
+                       .formats = PXA_SSP_FORMATS,
+               },
+               .capture = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .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,
+                },
+               .dai_ops = {
+                       .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,
+               },
+       },
+       {
+               .name = "pxa2xx-ssp3",
+               .id = 2,
+               .type = SND_SOC_DAI_PCM,
+               .probe = pxa_ssp_probe,
+               .remove = pxa_ssp_remove,
+               .suspend = pxa_ssp_suspend,
+               .resume = pxa_ssp_resume,
+               .playback = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .rates = PXA_SSP_RATES,
+                       .formats = PXA_SSP_FORMATS,
+               },
+               .capture = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .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,
+                },
+               .dai_ops = {
+                       .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,
+               },
+       },
+       {
+               .name = "pxa2xx-ssp4",
+               .id = 3,
+               .type = SND_SOC_DAI_PCM,
+               .probe = pxa_ssp_probe,
+               .remove = pxa_ssp_remove,
+               .suspend = pxa_ssp_suspend,
+               .resume = pxa_ssp_resume,
+               .playback = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .rates = PXA_SSP_RATES,
+                       .formats = PXA_SSP_FORMATS,
+               },
+               .capture = {
+                       .channels_min = 1,
+                       .channels_max = 2,
+                       .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,
+                },
+               .dai_ops = {
+                       .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,
+               },
+       },
+};
+EXPORT_SYMBOL_GPL(pxa_ssp_dai);
+
+/* Module information */
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/pxa/pxa-ssp.h b/sound/soc/pxa/pxa-ssp.h
new file mode 100644 (file)
index 0000000..91deadd
--- /dev/null
@@ -0,0 +1,47 @@
+/*
+ * ASoC PXA SSP port support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _PXA_SSP_H
+#define _PXA_SSP_H
+
+/* pxa DAI SSP IDs */
+#define PXA_DAI_SSP1                   0
+#define PXA_DAI_SSP2                   1
+#define PXA_DAI_SSP3                   2
+#define PXA_DAI_SSP4                   3
+
+/* SSP clock sources */
+#define PXA_SSP_CLK_PLL        0
+#define PXA_SSP_CLK_EXT        1
+#define PXA_SSP_CLK_NET        2
+#define PXA_SSP_CLK_AUDIO      3
+#define PXA_SSP_CLK_NET_PLL    4
+
+/* SSP audio dividers */
+#define PXA_SSP_AUDIO_DIV_ACDS         0
+#define PXA_SSP_AUDIO_DIV_SCDB         1
+#define PXA_SSP_DIV_SCR                                2
+
+/* SSP ACDS audio dividers values */
+#define PXA_SSP_CLK_AUDIO_DIV_1                0
+#define PXA_SSP_CLK_AUDIO_DIV_2                1
+#define PXA_SSP_CLK_AUDIO_DIV_4                2
+#define PXA_SSP_CLK_AUDIO_DIV_8                3
+#define PXA_SSP_CLK_AUDIO_DIV_16       4
+#define PXA_SSP_CLK_AUDIO_DIV_32       5
+
+/* SSP divider bypass */
+#define PXA_SSP_CLK_SCDB_4             0
+#define PXA_SSP_CLK_SCDB_1             1
+#define PXA_SSP_CLK_SCDB_8             2
+
+#define PXA_SSP_PLL_OUT  0
+
+extern struct snd_soc_dai pxa_ssp_dai[4];
+
+#endif