ccwmx51: Support for the WM8753 audio chip

Adding audio support for the WM8753 chip.

Signed-off-by: Alejandro Gonzalez <alex.gonzalez@digi.com>

5 files changed, 307 insertions, 1 deletions

diff --git a/sound/soc/codecs/wm8753.c b/sound/soc/codecs/wm8753.c
index 49c4b2898aff..921932ab2d3a 100644
--- a/sound/soc/codecs/wm8753.c
+++ b/sound/soc/codecs/wm8753.c
@@ -1848,6 +1848,7 @@ static struct spi_driver wm8753_spi_driver = {
 static int __init wm8753_modinit(void)
 {
 	int ret;
+
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	ret = i2c_add_driver(&wm8753_i2c_driver);
 	if (ret != 0)
diff --git a/sound/soc/imx/Kconfig b/sound/soc/imx/Kconfig
index c642782e1721..43b6d8e3b10c 100644
--- a/sound/soc/imx/Kconfig
+++ b/sound/soc/imx/Kconfig
@@ -56,6 +56,14 @@ config SND_SOC_IMX_3STACK_WM8580
    Say Y if you want to add support for Soc audio on IMX 3STACK
    with the WM8580
 
+config SND_SOC_IMX_CCWMX51_WM8753
+ tristate "SoC Audio support for IMX - WM8753"
+ select SND_MXC_SOC_SSI
+ select SND_SOC_WM8753
+ help
+   Say Y if you want to add support for Soc audio on IMX CCWMX51
+   with the WM8753
+
 config SND_SOC_IMX_3STACK_AK5702
  tristate "SoC Audio support for IMX - AK5702"
  select SND_MXC_SOC_ESAI
diff --git a/sound/soc/imx/Makefile b/sound/soc/imx/Makefile
index d8cd279eb62b..284be7777de7 100644
--- a/sound/soc/imx/Makefile
+++ b/sound/soc/imx/Makefile
@@ -18,6 +18,8 @@ snd-soc-imx-3stack-ak4647-objs := imx-3stack-ak4647.o
 obj-$(CONFIG_SND_SOC_IMX_3STACK_AK4647) += snd-soc-imx-3stack-ak4647.o
 snd-soc-imx-3stack-wm8580-objs := imx-3stack-wm8580.o
 obj-$(CONFIG_SND_SOC_IMX_3STACK_WM8580) += snd-soc-imx-3stack-wm8580.o
+snd-soc-imx-ccwmx51-wm8753-objs := imx-ccwmx51-wm8753.o
+obj-$(CONFIG_SND_SOC_IMX_CCWMX51_WM8753) += snd-soc-imx-ccwmx51-wm8753.o
 snd-soc-imx-3stack-ak5702-objs := imx-3stack-ak5702.o
 obj-$(CONFIG_SND_SOC_IMX_3STACK_AK5702) += snd-soc-imx-3stack-ak5702.o
 snd-soc-imx-3stack-bt-objs := imx-3stack-bt.o
diff --git a/sound/soc/imx/imx-ccwmx51-wm8753.c b/sound/soc/imx/imx-ccwmx51-wm8753.c
new file mode 100644
index 000000000000..ecbc9cc126a0
--- /dev/null
+++ b/sound/soc/imx/imx-ccwmx51-wm8753.c
@@ -0,0 +1,293 @@
+/*
+ * imx-ccwmx51-wm8753.c  --  i.MX CCWMX51 Driver for Freescale WM8753 Codec
+ *
+ * Copyright 2010 Digi International, Inc. All Rights Reserved.
+ *
+ *  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.
+ *
+ * Adapted from sound/soc/imx/imx-3stack-sgtl5000.c.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+
+#include <mach/dma.h>
+#include <mach/spba.h>
+#include <mach/clock.h>
+
+#include "../codecs/wm8753.h"
+#include "imx-ssi.h"
+#include "imx-pcm.h"
+
+/* SSI BCLK and LRC master */
+#define WM8753_SSI_MASTER	1
+
+struct imx_ccwmx51_priv {
+	int sysclk;
+	struct platform_device *pdev;
+};
+
+static struct imx_ccwmx51_priv card_priv;
+
+static int imx_ccwmx51_audio_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_link *machine = rtd->dai;
+	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
+	struct snd_soc_dai *codec_dai = machine->codec_dai;
+	struct imx_ccwmx51_priv *priv = &card_priv;
+	struct imx_ssi *ssi_mode = (struct imx_ssi *)cpu_dai->private_data;
+	int ret = 0;
+
+	unsigned int channels = params_channels(params);
+	u32 dai_format;
+
+	snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, priv->sysclk, 0);
+
+#if WM8753_SSI_MASTER
+	dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+	    SND_SOC_DAIFMT_CBM_CFM;
+#else
+	dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+	    SND_SOC_DAIFMT_CBS_CFS;
+#endif
+
+	ssi_mode->sync_mode = 1;
+	if (channels == 1)
+		ssi_mode->network_mode = 0;
+	else
+		ssi_mode->network_mode = 1;
+
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
+	if (ret < 0)
+		return ret;
+
+	/* set i.MX active slot mask */
+	snd_soc_dai_set_tdm_slot(cpu_dai,
+				 channels == 1 ? 0xfffffffe : 0xfffffffc, 2);
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
+	if (ret < 0)
+		return ret;
+
+	/* set the SSI system clock as input (unused) */
+	snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0, SND_SOC_CLOCK_IN);
+
+	return 0;
+}
+
+static int imx_ccwmx51_startup(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static void imx_ccwmx51_shutdown(struct snd_pcm_substream *substream)
+{
+
+}
+
+/*
+ * imx_ccwmx51 WM8753 audio DAI operations.
+ */
+static struct snd_soc_ops imx_ccwmx51_ops = {
+	.startup = imx_ccwmx51_startup,
+	.shutdown = imx_ccwmx51_shutdown,
+	.hw_params = imx_ccwmx51_audio_hw_params,
+};
+
+static void imx_ccwmx51_init_dam(int ssi_port, int dai_port)
+{
+	unsigned int ssi_ptcr = 0;
+	unsigned int dai_ptcr = 0;
+	unsigned int ssi_pdcr = 0;
+	unsigned int dai_pdcr = 0;
+	/* iMX51 uses SSI1 or SSI2 via AUDMUX port dai_port for audio */
+
+	/* reset port ssi_port & dai_port */
+	__raw_writel(0, DAM_PTCR(ssi_port));
+	__raw_writel(0, DAM_PTCR(dai_port));
+	__raw_writel(0, DAM_PDCR(ssi_port));
+	__raw_writel(0, DAM_PDCR(dai_port));
+
+	/* set to synchronous */
+	ssi_ptcr |= AUDMUX_PTCR_SYN;
+	dai_ptcr |= AUDMUX_PTCR_SYN;
+
+#if WM8753_SSI_MASTER
+	/* set Rx sources ssi_port <--> dai_port */
+	ssi_pdcr |= AUDMUX_PDCR_RXDSEL(dai_port);
+	dai_pdcr |= AUDMUX_PDCR_RXDSEL(ssi_port);
+
+	/* set Tx frame direction and source  dai_port--> ssi_port output */
+	ssi_ptcr |= AUDMUX_PTCR_TFSDIR;
+	ssi_ptcr |= AUDMUX_PTCR_TFSSEL(AUDMUX_FROM_TXFS, dai_port);
+
+	/* set Tx Clock direction and source dai_port--> ssi_port output */
+	ssi_ptcr |= AUDMUX_PTCR_TCLKDIR;
+	ssi_ptcr |= AUDMUX_PTCR_TCSEL(AUDMUX_FROM_TXFS, dai_port);
+#else
+	/* set Rx sources ssi_port <--> dai_port */
+	ssi_pdcr |= AUDMUX_PDCR_RXDSEL(dai_port);
+	dai_pdcr |= AUDMUX_PDCR_RXDSEL(ssi_port);
+
+	/* set Tx frame direction and source  ssi_port --> dai_port output */
+	dai_ptcr |= AUDMUX_PTCR_TFSDIR;
+	dai_ptcr |= AUDMUX_PTCR_TFSSEL(AUDMUX_FROM_TXFS, ssi_port);
+
+	/* set Tx Clock direction and source ssi_port--> dai_port output */
+	dai_ptcr |= AUDMUX_PTCR_TCLKDIR;
+	dai_ptcr |= AUDMUX_PTCR_TCSEL(AUDMUX_FROM_TXFS, ssi_port);
+#endif
+
+	__raw_writel(ssi_ptcr, DAM_PTCR(ssi_port));
+	__raw_writel(dai_ptcr, DAM_PTCR(dai_port));
+	__raw_writel(ssi_pdcr, DAM_PDCR(ssi_port));
+	__raw_writel(dai_pdcr, DAM_PDCR(dai_port));
+}
+
+static int imx_ccwmx51_wm8753_init(struct snd_soc_codec *codec)
+{
+	return 0;
+}
+
+/* imx_ccwmx51 digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link imx_ccwmx51_dai = {
+	.name = "WM8753",
+	.stream_name = "WM8753",
+	.codec_dai = (struct snd_soc_dai *) &wm8753_dai,
+	.init = imx_ccwmx51_wm8753_init,
+	.ops = &imx_ccwmx51_ops,
+};
+
+static int imx_ccwmx51_card_remove(struct platform_device *pdev)
+{
+	struct imx_ccwmx51_priv *priv = &card_priv;
+	struct mxc_audio_platform_data *plat;
+
+	if (priv->pdev) {
+		plat = priv->pdev->dev.platform_data;
+		if (plat->finit)
+			plat->finit();
+	}
+
+	return 0;
+}
+
+static struct snd_soc_card snd_soc_card_imx_ccwmx51 = {
+	.name = "imx-ccwmx51",
+	.platform = &imx_soc_platform,
+	.dai_link = &imx_ccwmx51_dai,
+	.num_links = 1,
+	.remove = imx_ccwmx51_card_remove,
+};
+
+static struct snd_soc_device imx_ccwmx51_snd_devdata = {
+	.card = &snd_soc_card_imx_ccwmx51,
+	.codec_dev = &soc_codec_dev_wm8753,
+};
+
+static int __devinit imx_ccwmx51_wm8753_probe(struct platform_device *pdev)
+{
+	struct mxc_audio_platform_data *plat = pdev->dev.platform_data;
+	struct imx_ccwmx51_priv *priv = &card_priv;
+	struct snd_soc_dai *wm8753_cpu_dai;
+	int ret = 0;
+
+	priv->sysclk = plat->sysclk;
+	priv->pdev = pdev;
+
+	imx_ccwmx51_init_dam(plat->src_port, plat->ext_port);
+
+	if (plat->src_port == 2)
+		wm8753_cpu_dai = &imx_ssi_dai[2];
+	else
+		wm8753_cpu_dai = &imx_ssi_dai[0];
+
+	imx_ccwmx51_dai.cpu_dai = wm8753_cpu_dai;
+
+	ret = -EINVAL;
+	if (plat->init && plat->init())
+		goto err_plat_init;
+
+	return 0;
+
+err_plat_init:
+	return ret;
+}
+
+static int imx_ccwmx51_wm8753_remove(struct platform_device *pdev)
+{
+	struct mxc_audio_platform_data *plat = pdev->dev.platform_data;
+
+	if (plat->finit)
+		plat->finit();
+
+	return 0;
+}
+
+static struct platform_driver imx_ccwmx51_wm8753_audio_driver = {
+	.probe = imx_ccwmx51_wm8753_probe,
+	.remove = imx_ccwmx51_wm8753_remove,
+	.driver = {
+		   .name = "imx-ccwmx51",
+		   },
+};
+
+static struct platform_device *imx_ccwmx51_snd_device;
+
+static int __init imx_ccwmx51_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&imx_ccwmx51_wm8753_audio_driver);
+	if (ret)
+		return -ENOMEM;
+
+	imx_ccwmx51_snd_device = platform_device_alloc("soc-audio", 2);
+	if (!imx_ccwmx51_snd_device)
+		return -ENOMEM;
+
+	platform_set_drvdata(imx_ccwmx51_snd_device, &imx_ccwmx51_snd_devdata);
+	imx_ccwmx51_snd_devdata.dev = &imx_ccwmx51_snd_device->dev;
+	ret = platform_device_add(imx_ccwmx51_snd_device);
+
+	if (ret)
+		platform_device_put(imx_ccwmx51_snd_device);
+
+	return ret;
+}
+
+static void __exit imx_ccwmx51_exit(void)
+{
+	platform_driver_unregister(&imx_ccwmx51_wm8753_audio_driver);
+	platform_device_unregister(imx_ccwmx51_snd_device);
+}
+
+module_init(imx_ccwmx51_init);
+module_exit(imx_ccwmx51_exit);
+
+MODULE_AUTHOR("Digi International, Inc.");
+MODULE_DESCRIPTION("WM8753 Driver for i.MX CCWMX51");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 1d70829464ef..d3de8902ed8e 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -125,7 +125,7 @@ static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 
 	if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
 	    machine->symmetric_rates) {
-		dev_dbg(card->dev, "Symmetry forces %dHz rate\n", 
+		dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
 			machine->rate);
 
 		ret = snd_pcm_hw_constraint_minmax(substream->runtime,
@@ -2245,8 +2245,10 @@ int snd_soc_register_dai(struct snd_soc_dai *dai)
 		return -EINVAL;
 
 	/* The device should become mandatory over time */
+#ifdef DEBUG
 	if (!dai->dev)
 		printk(KERN_WARNING "No device for DAI %s\n", dai->name);
+#endif
 
 	if (!dai->ops)
 		dai->ops = &null_dai_ops;