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Subject[PATCH 8/9] ASoC: Blackfin: board driver for SSM2602 sound chip
Date
From: Cliff Cai <cliff.cai@analog.com>

Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
sound/soc/blackfin/bf5xx-ssm2602.c | 186 ++++++++++++++++++++++++++++++++++++
1 files changed, 186 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/blackfin/bf5xx-ssm2602.c
diff --git a/sound/soc/blackfin/bf5xx-ssm2602.c b/sound/soc/blackfin/bf5xx-ssm2602.c
new file mode 100644
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");
+
--
1.5.6

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