ASoC: Add driver for the Lyrtech SFFSDR board

The PCM3008 is used on the Lyrtech SFFSDR board, in conjunction with an
FPGA that generates the bit clock and the master clock

[Downgraded the rate debug print to pr_debug() in hw_params, converted
asm/gpio.h to linux/gpio.h -- broonie]

Signed-off-by: Hugo Villeneuve <hugo@hugovil.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 156 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..69a8a769f4d8
--- /dev/null
+++ b/sound/soc/davinci/davinci-sffsdr.c
@@ -0,0 +1,156 @@
+/*
+ * 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_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_machine snd_soc_machine_sffsdr = {
+        .name = "DaVinci SFFSDR",
+        .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 = {
+        .machine = &snd_soc_machine_sffsdr,
+        .platform = &davinci_soc_platform,
+        .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");