ASoC: EP93xx: Add Snapper CL15 i2s audio support

Add support for i2s audio on Bluewater Systems Snapper CL15 module

Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

4 files changed, 163 insertions, 0 deletions

diff --git a/arch/arm/mach-ep93xx/snappercl15.c b/arch/arm/mach-ep93xx/snappercl15.c
index 38deaee40397..a12c89301297 100644
--- a/arch/arm/mach-ep93xx/snappercl15.c
+++ b/arch/arm/mach-ep93xx/snappercl15.c
@@ -157,6 +157,7 @@ static void __init snappercl15_init_machine(void)
         ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
                             ARRAY_SIZE(snappercl15_i2c_data));
         ep93xx_register_fb(&snappercl15_fb_info);
+        ep93xx_register_i2s();
         platform_device_register(&snappercl15_nand_device);
 }
 
diff --git a/sound/soc/ep93xx/Kconfig b/sound/soc/ep93xx/Kconfig
index ba66ac8e1419..f617f560f46b 100644
--- a/sound/soc/ep93xx/Kconfig
+++ b/sound/soc/ep93xx/Kconfig
@@ -7,3 +7,12 @@ config SND_EP93XX_SOC
 
 config SND_EP93XX_SOC_I2S
         tristate
+
+config SND_EP93XX_SOC_SNAPPERCL15
+        tristate "SoC Audio support for Bluewater Systems Snapper CL15 module"
+        depends on SND_EP93XX_SOC && MACH_SNAPPER_CL15
+        select SND_EP93XX_SOC_I2S
+        select SND_SOC_TLV320AIC23
+        help
+          Say Y or M here if you want to add support for I2S audio on the
+          Bluewater Systems Snapper CL15 module.
diff --git a/sound/soc/ep93xx/Makefile b/sound/soc/ep93xx/Makefile
index 0239da36cea3..272e60f57b9a 100644
--- a/sound/soc/ep93xx/Makefile
+++ b/sound/soc/ep93xx/Makefile
@@ -6,3 +6,6 @@ obj-$(CONFIG_SND_EP93XX_SOC)			+= snd-soc-ep93xx.o
 obj-$(CONFIG_SND_EP93XX_SOC_I2S)                += snd-soc-ep93xx-i2s.o
 
 # EP93XX Machine Support
+snd-soc-snappercl15-objs                        := snappercl15.o
+
+obj-$(CONFIG_SND_EP93XX_SOC_SNAPPERCL15)        += snd-soc-snappercl15.o
diff --git a/sound/soc/ep93xx/snappercl15.c b/sound/soc/ep93xx/snappercl15.c
new file mode 100644
index 000000000000..64955340ff75
--- /dev/null
+++ b/sound/soc/ep93xx/snappercl15.c
@@ -0,0 +1,150 @@
+/*
+ * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
+ *
+ * Copyright (C) 2008 Bluewater Systems Ltd
+ * Author: Ryan Mallon <ryan@bluewatersys.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.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+
+#include "../codecs/tlv320aic23.h"
+#include "ep93xx-pcm.h"
+#include "ep93xx-i2s.h"
+
+#define CODEC_CLOCK 5644800
+
+static int snappercl15_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 err;
+
+        err = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+                                  SND_SOC_DAIFMT_NB_IF |
+                                  SND_SOC_DAIFMT_CBS_CFS);
+
+        err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | 
+                                  SND_SOC_DAIFMT_NB_IF |                  
+                                  SND_SOC_DAIFMT_CBS_CFS);
+        if (err)
+                return err;
+
+        err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, 
+                                     SND_SOC_CLOCK_IN);
+        if (err)
+                return err;
+
+        err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK, 
+                                     SND_SOC_CLOCK_OUT);
+        if (err)
+                return err;
+
+        return 0;
+}
+
+static struct snd_soc_ops snappercl15_ops = {
+        .hw_params      = snappercl15_hw_params,
+};
+
+static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
+        SND_SOC_DAPM_HP("Headphone Jack", NULL),
+        SND_SOC_DAPM_LINE("Line In", NULL),
+        SND_SOC_DAPM_MIC("Mic Jack", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+        {"Headphone Jack", NULL, "LHPOUT"},
+        {"Headphone Jack", NULL, "RHPOUT"},
+
+        {"LLINEIN", NULL, "Line In"},
+        {"RLINEIN", NULL, "Line In"},
+
+        {"MICIN", NULL, "Mic Jack"},
+};
+
+static int snappercl15_tlv320aic23_init(struct snd_soc_codec *codec)
+{
+        snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
+                                  ARRAY_SIZE(tlv320aic23_dapm_widgets));
+
+        snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+        return 0;
+}
+
+static struct snd_soc_dai_link snappercl15_dai = {
+        .name           = "tlv320aic23",
+        .stream_name    = "AIC23",
+        .cpu_dai        = &ep93xx_i2s_dai,
+        .codec_dai      = &tlv320aic23_dai,
+        .init           = snappercl15_tlv320aic23_init,
+        .ops            = &snappercl15_ops,
+};
+
+static struct snd_soc_card snd_soc_snappercl15 = {
+        .name           = "Snapper CL15",
+        .platform       = &ep93xx_soc_platform,
+        .dai_link       = &snappercl15_dai,
+        .num_links      = 1,
+};
+
+static struct snd_soc_device snappercl15_snd_devdata = {
+        .card           = &snd_soc_snappercl15,
+        .codec_dev      = &soc_codec_dev_tlv320aic23,
+};
+
+static struct platform_device *snappercl15_snd_device;
+
+static int __init snappercl15_init(void)
+{
+        int ret;
+
+        if (!machine_is_snapper_cl15())
+                return -ENODEV;
+
+        ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
+                                 EP93XX_SYSCON_I2SCLKDIV_ORIDE |
+                                 EP93XX_SYSCON_I2SCLKDIV_SPOL);
+        if (ret)
+                return ret;
+
+        snappercl15_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!snappercl15_snd_device)
+                return -ENOMEM;
+        
+        platform_set_drvdata(snappercl15_snd_device, &snappercl15_snd_devdata);
+        snappercl15_snd_devdata.dev = &snappercl15_snd_device->dev;
+        ret = platform_device_add(snappercl15_snd_device);
+        if (ret)
+                platform_device_put(snappercl15_snd_device);
+
+        return ret;
+}
+
+static void __exit snappercl15_exit(void)
+{
+        platform_device_unregister(snappercl15_snd_device);
+        ep93xx_i2s_release();
+}
+
+module_init(snappercl15_init);
+module_exit(snappercl15_exit);
+
+MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
+MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
+MODULE_LICENSE("GPL");
+