summaryrefslogtreecommitdiff
path: root/sound/soc/davinci/davinci-sffsdr.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/davinci/davinci-sffsdr.c')
-rw-r--r--sound/soc/davinci/davinci-sffsdr.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-sffsdr.c b/sound/soc/davinci/davinci-sffsdr.c
new file mode 100644
index 000000000000..f67579d52765
--- /dev/null
+++ b/sound/soc/davinci/davinci-sffsdr.c
@@ -0,0 +1,157 @@
+/*
+ * ASoC driver for Lyrtech SFFSDR board.
+ *
+ * Author: Hugo Villeneuve
+ * Copyright (C) 2008 Lyrtech inc
+ *
+ * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:
+ * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/dma.h>
+#include <asm/plat-sffsdr/sffsdr-fpga.h>
+
+#include <mach/mcbsp.h>
+#include <mach/edma.h>
+
+#include "../codecs/pcm3008.h"
+#include "davinci-pcm.h"
+#include "davinci-i2s.h"
+
+static int sffsdr_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+ int fs;
+ int ret = 0;
+
+ /* Set cpu DAI configuration:
+ * CLKX and CLKR are the inputs for the Sample Rate Generator.
+ * FSX and FSR are outputs, driven by the sample Rate Generator. */
+ ret = snd_soc_dai_set_fmt(cpu_dai,
+ SND_SOC_DAIFMT_RIGHT_J |
+ SND_SOC_DAIFMT_CBM_CFS |
+ SND_SOC_DAIFMT_IB_NF);
+ if (ret < 0)
+ return ret;
+
+ /* Fsref can be 32000, 44100 or 48000. */
+ fs = params_rate(params);
+
+ pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
+
+ return sffsdr_fpga_set_codec_fs(fs);
+}
+
+static struct snd_soc_ops sffsdr_ops = {
+ .hw_params = sffsdr_hw_params,
+};
+
+/* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link sffsdr_dai = {
+ .name = "PCM3008", /* Codec name */
+ .stream_name = "PCM3008 HiFi",
+ .cpu_dai = &davinci_i2s_dai,
+ .codec_dai = &pcm3008_dai,
+ .ops = &sffsdr_ops,
+};
+
+/* davinci-sffsdr audio machine driver */
+static struct snd_soc_card snd_soc_sffsdr = {
+ .name = "DaVinci SFFSDR",
+ .platform = &davinci_soc_platform,
+ .dai_link = &sffsdr_dai,
+ .num_links = 1,
+};
+
+/* sffsdr audio private data */
+static struct pcm3008_setup_data sffsdr_pcm3008_setup = {
+ .dem0_pin = GPIO(45),
+ .dem1_pin = GPIO(46),
+ .pdad_pin = GPIO(47),
+ .pdda_pin = GPIO(38),
+};
+
+/* sffsdr audio subsystem */
+static struct snd_soc_device sffsdr_snd_devdata = {
+ .card = &snd_soc_sffsdr,
+ .codec_dev = &soc_codec_dev_pcm3008,
+ .codec_data = &sffsdr_pcm3008_setup,
+};
+
+static struct resource sffsdr_snd_resources[] = {
+ {
+ .start = DAVINCI_MCBSP_BASE,
+ .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct evm_snd_platform_data sffsdr_snd_data = {
+ .tx_dma_ch = DAVINCI_DMA_MCBSP_TX,
+ .rx_dma_ch = DAVINCI_DMA_MCBSP_RX,
+};
+
+static struct platform_device *sffsdr_snd_device;
+
+static int __init sffsdr_init(void)
+{
+ int ret;
+
+ sffsdr_snd_device = platform_device_alloc("soc-audio", 0);
+ if (!sffsdr_snd_device) {
+ printk(KERN_ERR "platform device allocation failed\n");
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(sffsdr_snd_device, &sffsdr_snd_devdata);
+ sffsdr_snd_devdata.dev = &sffsdr_snd_device->dev;
+ sffsdr_snd_device->dev.platform_data = &sffsdr_snd_data;
+
+ ret = platform_device_add_resources(sffsdr_snd_device,
+ sffsdr_snd_resources,
+ ARRAY_SIZE(sffsdr_snd_resources));
+ if (ret) {
+ printk(KERN_ERR "platform device add ressources failed\n");
+ goto error;
+ }
+
+ ret = platform_device_add(sffsdr_snd_device);
+ if (ret)
+ goto error;
+
+ return ret;
+
+error:
+ platform_device_put(sffsdr_snd_device);
+ return ret;
+}
+
+static void __exit sffsdr_exit(void)
+{
+ platform_device_unregister(sffsdr_snd_device);
+}
+
+module_init(sffsdr_init);
+module_exit(sffsdr_exit);
+
+MODULE_AUTHOR("Hugo Villeneuve");
+MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
+MODULE_LICENSE("GPL");