sound: ASoC: Blackfin: board driver for SSM2602 sound chip

Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/sound/soc/blackfin/bf5xx-ssm2602.c b/sound/soc/blackfin/bf5xx-ssm2602.c
new file mode 100644 (file)
index 0000000..e15f67f
--- /dev/null
+++ b/sound/soc/blackfin/bf5xx-ssm2602.c
@@ -0,0 +1,186 @@
+/*
+ * File:         sound/soc/blackfin/bf5xx-ssm2602.c
+ * Author:       Cliff Cai <Cliff.Cai@analog.com>
+ *
+ * Created:      Tue June 06 2008
+ * Description:  board driver for SSM2602 sound chip
+ *
+ * Modified:
+ *               Copyright 2008 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * 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, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm_params.h>
+
+#include <asm/dma.h>
+#include <asm/portmux.h>
+#include <linux/gpio.h>
+#include "../codecs/ssm2602.h"
+#include "bf5xx-sport.h"
+#include "bf5xx-i2s-pcm.h"
+#include "bf5xx-i2s.h"
+
+static struct snd_soc_machine bf5xx_ssm2602;
+
+static int bf5xx_ssm2602_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;
+
+       pr_debug("%s enter\n", __func__);
+       cpu_dai->private_data = sport_handle;
+       return 0;
+}
+
+static int bf5xx_ssm2602_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;
+       unsigned int clk = 0;
+       int ret = 0;
+
+       pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
+               params_format(params));
+       /*
+        * If you are using a crystal source which frequency is not 12MHz
+        * then modify the below case statement with frequency of the crystal.
+        *
+        * If you are using the SPORT to generate clocking then this is
+        * where to do it.
+        */
+
+       switch (params_rate(params)) {
+       case 8000:
+       case 16000:
+       case 48000:
+       case 96000:
+       case 11025:
+       case 22050:
+       case 44100:
+               clk = 12000000;
+               break;
+       }
+
+       /*
+        * CODEC is master for BCLK and LRC in this configuration.
+        */
+
+       /* set codec DAI configuration */
+       ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+               SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+       if (ret < 0)
+               return ret;
+       /* set cpu DAI configuration */
+       ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
+               SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+       if (ret < 0)
+               return ret;
+
+       ret = codec_dai->dai_ops.set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
+               SND_SOC_CLOCK_IN);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static struct snd_soc_ops bf5xx_ssm2602_ops = {
+       .startup = bf5xx_ssm2602_startup,
+       .hw_params = bf5xx_ssm2602_hw_params,
+};
+
+static struct snd_soc_dai_link bf5xx_ssm2602_dai = {
+       .name = "ssm2602",
+       .stream_name = "SSM2602",
+       .cpu_dai = &bf5xx_i2s_dai,
+       .codec_dai = &ssm2602_dai,
+       .ops = &bf5xx_ssm2602_ops,
+};
+
+/*
+ * SSM2602 2 wire address is determined by CSB
+ * state during powerup.
+ *    low  = 0x1a
+ *    high = 0x1b
+ */
+
+static struct ssm2602_setup_data bf5xx_ssm2602_setup = {
+       .i2c_bus = 0,
+       .i2c_address = 0x1b,
+};
+
+static struct snd_soc_machine bf5xx_ssm2602 = {
+       .name = "bf5xx_ssm2602",
+       .dai_link = &bf5xx_ssm2602_dai,
+       .num_links = 1,
+};
+
+static struct snd_soc_device bf5xx_ssm2602_snd_devdata = {
+       .machine = &bf5xx_ssm2602,
+       .platform = &bf5xx_i2s_soc_platform,
+       .codec_dev = &soc_codec_dev_ssm2602,
+       .codec_data = &bf5xx_ssm2602_setup,
+};
+
+static struct platform_device *bf52x_ssm2602_snd_device;
+
+static int __init bf5xx_ssm2602_init(void)
+{
+       int ret;
+
+       pr_debug("%s enter\n", __func__);
+       bf52x_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
+       if (!bf52x_ssm2602_snd_device)
+               return -ENOMEM;
+
+       platform_set_drvdata(bf52x_ssm2602_snd_device,
+                               &bf5xx_ssm2602_snd_devdata);
+       bf5xx_ssm2602_snd_devdata.dev = &bf52x_ssm2602_snd_device->dev;
+       ret = platform_device_add(bf52x_ssm2602_snd_device);
+
+       if (ret)
+               platform_device_put(bf52x_ssm2602_snd_device);
+
+       return ret;
+}
+
+static void __exit bf5xx_ssm2602_exit(void)
+{
+       pr_debug("%s enter\n", __func__);
+       platform_device_unregister(bf52x_ssm2602_snd_device);
+}
+
+module_init(bf5xx_ssm2602_init);
+module_exit(bf5xx_ssm2602_exit);
+
+/* Module information */
+MODULE_AUTHOR("Cliff Cai");
+MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
+MODULE_LICENSE("GPL");
+