ASoC: imx: add eukrea-tlv320

Add the necessary files to support the TLV320AIC23B wired in I2S
on our i.MX platforms.

Signed-off-by: Eric Bénard <eric@eukrea.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

3 files changed, 146 insertions, 0 deletions

diff --git a/sound/soc/imx/Kconfig b/sound/soc/imx/Kconfig
index 252defea93b5..079b23bb0b03 100644
--- a/sound/soc/imx/Kconfig
+++ b/sound/soc/imx/Kconfig
@@ -28,3 +28,12 @@ config SND_SOC_PHYCORE_AC97
         help
           Say Y if you want to add support for SoC audio on Phytec phyCORE
           and phyCARD boards in AC97 mode
+
+config SND_SOC_EUKREA_TLV320
+        bool "Eukrea TLV320"
+        depends on MACH_EUKREA_MBIMX27_BASEBOARD
+        select SND_IMX_SOC
+        select SND_SOC_TLV320AIC23
+        help
+          Enable I2S based access to the TLV320AIC23B codec attached
+          to the SSI4 interface
diff --git a/sound/soc/imx/Makefile b/sound/soc/imx/Makefile
index 2d203635ac11..7bc57baf2b0e 100644
--- a/sound/soc/imx/Makefile
+++ b/sound/soc/imx/Makefile
@@ -8,8 +8,10 @@ endif
 obj-$(CONFIG_SND_IMX_SOC) += snd-soc-imx.o
 
 # i.MX Machine Support
+snd-soc-eukrea-tlv320-objs := eukrea-tlv320.o
 snd-soc-phycore-ac97-objs := phycore-ac97.o
 snd-soc-wm1133-ev1-objs := wm1133-ev1.o
 
+obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
 obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
 obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
diff --git a/sound/soc/imx/eukrea-tlv320.c b/sound/soc/imx/eukrea-tlv320.c
new file mode 100644
index 000000000000..968380a93e89
--- /dev/null
+++ b/sound/soc/imx/eukrea-tlv320.c
@@ -0,0 +1,135 @@
+/*
+ * eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
+ *
+ * Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
+ *
+ * based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
+ * which is Copyright 2009 Simtec Electronics
+ * and on sound/soc/imx/phycore-ac97.c which is
+ * Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
+ * 
+ *  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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <asm/mach-types.h>
+
+#include "../codecs/tlv320aic23.h"
+#include "imx-ssi.h"
+
+#define CODEC_CLOCK 12000000
+
+static int eukrea_tlv320_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 *codec_dai = rtd->dai->codec_dai;
+        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+        int ret;
+
+        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
+                                  SND_SOC_DAIFMT_NB_NF |
+                                  SND_SOC_DAIFMT_CBM_CFM);
+        if (ret) {
+                pr_err("%s: failed set cpu dai format\n", __func__);
+                return ret;
+        }
+
+        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+                                  SND_SOC_DAIFMT_NB_NF |
+                                  SND_SOC_DAIFMT_CBM_CFM);
+        if (ret) {
+                pr_err("%s: failed set codec dai format\n", __func__);
+                return ret;
+        }
+
+        ret = snd_soc_dai_set_sysclk(codec_dai, 0,
+                                     CODEC_CLOCK, SND_SOC_CLOCK_OUT);
+        if (ret) {
+                pr_err("%s: failed setting codec sysclk\n", __func__);
+                return ret;
+        }
+
+        ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
+                                SND_SOC_CLOCK_IN);
+        if (ret) {
+                pr_err("can't set CPU system clock IMX_SSP_SYS_CLK\n");
+                return ret;
+        }
+
+        return 0;
+}
+
+static struct snd_soc_ops eukrea_tlv320_snd_ops = {
+        .hw_params      = eukrea_tlv320_hw_params,
+};
+
+static struct snd_soc_dai_link eukrea_tlv320_dai = {
+        .name           = "tlv320aic23",
+        .stream_name    = "TLV320AIC23",
+        .codec_dai      = &tlv320aic23_dai,
+        .ops            = &eukrea_tlv320_snd_ops,
+};
+
+static struct snd_soc_card eukrea_tlv320 = {
+        .name           = "cpuimx-audio",
+        .platform       = &imx_soc_platform,
+        .dai_link       = &eukrea_tlv320_dai,
+        .num_links      = 1,
+};
+
+static struct snd_soc_device eukrea_tlv320_snd_devdata = {
+        .card           = &eukrea_tlv320,
+        .codec_dev      = &soc_codec_dev_tlv320aic23,
+};
+
+static struct platform_device *eukrea_tlv320_snd_device;
+
+static int __init eukrea_tlv320_init(void)
+{
+        int ret;
+
+        if (!machine_is_eukrea_cpuimx27())
+                /* return happy. We might run on a totally different machine */
+                return 0;
+
+        eukrea_tlv320_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!eukrea_tlv320_snd_device)
+                return -ENOMEM;
+
+        eukrea_tlv320_dai.cpu_dai = &imx_ssi_pcm_dai[0];
+
+        platform_set_drvdata(eukrea_tlv320_snd_device, &eukrea_tlv320_snd_devdata);
+        eukrea_tlv320_snd_devdata.dev = &eukrea_tlv320_snd_device->dev;
+        ret = platform_device_add(eukrea_tlv320_snd_device);
+
+        if (ret) {
+                printk(KERN_ERR "ASoC: Platform device allocation failed\n");
+                platform_device_put(eukrea_tlv320_snd_device);
+        }
+
+        return ret;
+}
+
+static void __exit eukrea_tlv320_exit(void)
+{
+        platform_device_unregister(eukrea_tlv320_snd_device);
+}
+
+module_init(eukrea_tlv320_init);
+module_exit(eukrea_tlv320_exit);
+
+MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
+MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
+MODULE_LICENSE("GPL");