ASoC: Add support for omap2evm board

This patch adds twl4030 audio support on omap2evm

Signed-off-by: Arun KS <arunks@mistralsolutions.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index cf40e42954af6c4bda39c7ede99d7f65b764c6ab..6c56277e160bdafa978225b917952848c96c70fd 100644 (file)
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -30,4 +30,13 @@ config SND_OMAP_SOC_OVERO
        help
          Say Y if you want to add support for SoC audio on the Gumstix Overo.
 
+config SND_OMAP_SOC_OMAP2EVM
+       tristate "SoC Audio support for OMAP2EVM board"
+       depends on SND_OMAP_SOC && MACH_OMAP2EVM
+       select SND_OMAP_SOC_MCBSP
+       select SND_SOC_TWL4030
+       help
+         Say Y if you want to add support for SoC audio on the omap2evm board.
+
+
 

diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
index fefc9bed053a913065f7e17fccc4a0d8c40af8ee..f5da3cc764ae79f25c96e55f0f95c3828ffb6306 100644 (file)
--- a/sound/soc/omap/Makefile
+++ b/sound/soc/omap/Makefile
@@ -9,8 +9,10 @@ obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o
 snd-soc-n810-objs := n810.o
 snd-soc-osk5912-objs := osk5912.o
 snd-soc-overo-objs := overo.o
+snd-soc-omap2evm-objs := omap2evm.o
 
 obj-$(CONFIG_SND_OMAP_SOC_N810) += snd-soc-n810.o
 obj-$(CONFIG_SND_OMAP_SOC_OSK5912) += snd-soc-osk5912.o
 obj-$(CONFIG_SND_OMAP_SOC_OVERO) += snd-soc-overo.o
+obj-$(CONFIG_MACH_OMAP2EVM) += snd-soc-omap2evm.o
 

diff --git a/sound/soc/omap/omap2evm.c b/sound/soc/omap/omap2evm.c
new file mode 100644 (file)
index 0000000..c376213
--- /dev/null
+++ b/sound/soc/omap/omap2evm.c
@@ -0,0 +1,150 @@
+/*
+ * omap2evm.c  --  SoC audio machine driver for omap2evm board
+ *
+ * Author: Arun KS <arunks@mistralsolutions.com>
+ *
+ * Based on sound/soc/omap/overo.c by Steve Sakoman
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/clk.h>
+#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 <mach/gpio.h>
+#include <mach/mcbsp.h>
+
+#include "omap-mcbsp.h"
+#include "omap-pcm.h"
+#include "../codecs/twl4030.h"
+
+static int omap2evm_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;
+
+       /* Set codec DAI configuration */
+       ret = snd_soc_dai_set_fmt(codec_dai,
+                                 SND_SOC_DAIFMT_I2S |
+                                 SND_SOC_DAIFMT_NB_NF |
+                                 SND_SOC_DAIFMT_CBM_CFM);
+       if (ret < 0) {
+               printk(KERN_ERR "can't set codec DAI configuration\n");
+               return ret;
+       }
+
+       /* Set cpu DAI configuration */
+       ret = snd_soc_dai_set_fmt(cpu_dai,
+                                 SND_SOC_DAIFMT_I2S |
+                                 SND_SOC_DAIFMT_NB_NF |
+                                 SND_SOC_DAIFMT_CBM_CFM);
+       if (ret < 0) {
+               printk(KERN_ERR "can't set cpu DAI configuration\n");
+               return ret;
+       }
+
+       /* Set the codec system clock for DAC and ADC */
+       ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
+                                           SND_SOC_CLOCK_IN);
+       if (ret < 0) {
+               printk(KERN_ERR "can't set codec system clock\n");
+               return ret;
+       }
+
+       return 0;
+}
+
+static struct snd_soc_ops omap2evm_ops = {
+       .hw_params = omap2evm_hw_params,
+};
+
+/* Digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link omap2evm_dai = {
+       .name = "TWL4030",
+       .stream_name = "TWL4030",
+       .cpu_dai = &omap_mcbsp_dai[0],
+       .codec_dai = &twl4030_dai,
+       .ops = &omap2evm_ops,
+};
+
+/* Audio machine driver */
+static struct snd_soc_machine snd_soc_machine_omap2evm = {
+       .name = "omap2evm",
+       .dai_link = &omap2evm_dai,
+       .num_links = 1,
+};
+
+/* Audio subsystem */
+static struct snd_soc_device omap2evm_snd_devdata = {
+       .machine = &snd_soc_machine_omap2evm,
+       .platform = &omap_soc_platform,
+       .codec_dev = &soc_codec_dev_twl4030,
+};
+
+static struct platform_device *omap2evm_snd_device;
+
+static int __init omap2evm_soc_init(void)
+{
+       int ret;
+
+       if (!machine_is_omap2evm()) {
+               pr_debug("Not omap2evm!\n");
+               return -ENODEV;
+       }
+       printk(KERN_INFO "omap2evm SoC init\n");
+
+       omap2evm_snd_device = platform_device_alloc("soc-audio", -1);
+       if (!omap2evm_snd_device) {
+               printk(KERN_ERR "Platform device allocation failed\n");
+               return -ENOMEM;
+       }
+
+       platform_set_drvdata(omap2evm_snd_device, &omap2evm_snd_devdata);
+       omap2evm_snd_devdata.dev = &omap2evm_snd_device->dev;
+       *(unsigned int *)omap2evm_dai.cpu_dai->private_data = 1; /* McBSP2 */
+
+       ret = platform_device_add(omap2evm_snd_device);
+       if (ret)
+               goto err1;
+
+       return 0;
+
+err1:
+       printk(KERN_ERR "Unable to add platform device\n");
+       platform_device_put(omap2evm_snd_device);
+
+       return ret;
+}
+module_init(omap2evm_soc_init);
+
+static void __exit omap2evm_soc_exit(void)
+{
+       platform_device_unregister(omap2evm_snd_device);
+}
+module_exit(omap2evm_soc_exit);
+
+MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
+MODULE_DESCRIPTION("ALSA SoC omap2evm");
+MODULE_LICENSE("GPL");