[RFC: WL1271 DC supprot on OMAP3EVM 4/5] ARM: Added ALSA audio support for WL1271 DC over the PCM interface (OMAP37XX)

csanjay-EvXpCiN+lbve9wHmmfpqLFaTQe2KTcn/
2010-10-13T10:57:18Z

From: Sanjay Kumar Champati <csanjay-EvXpCiN+lbve9wHmmfpqLFaTQe2KTcn/@public.gmane.org>

* Add "wl1271bt.c" & "wl1271bt.h" in the PS kernel to support PCM interface for OMAP37XX
* Modified "Makefile" file to compile "wl1271bt.c" & "wl1271bt.h" files
* Modified "omap3evm.c" file to support Audio codec for WL1271 DC

Signed-off-by: Sanjay Kumar Champati <csanjay-EvXpCiN+lbve9wHmmfpqLFaTQe2KTcn/@public.gmane.org>
---
sound/soc/omap/Kconfig | 6 +++
sound/soc/omap/Makefile | 2 +
sound/soc/omap/omap3evm.c | 81 +++++++++++++++++++++++++++++++++++++++++++-
sound/soc/omap/wl1271bt.c | 59 ++++++++++++++++++++++++++++++++
sound/soc/omap/wl1271bt.h | 16 +++++++++
5 files changed, 162 insertions(+), 2 deletions(-)
create mode 100644 sound/soc/omap/wl1271bt.c
create mode 100644 sound/soc/omap/wl1271bt.h

diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index 61952aa..68054c2 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -116,3 +116,9 @@ config SND_OMAP_SOC_IGEP0020
select SND_SOC_TWL4030
help
Say Y if you want to add support for Soc audio on IGEP v2 board.
+
+config SND_OMAP_SOC_WL1271BT
+ tristate "WL1271 Bluetooth Codec support"
+ default n
+ help
+ Say Y if you want to add support for WL1271 on OMAP3EVM board.
diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
index 19283e5..684b8f2 100644
--- a/sound/soc/omap/Makefile
+++ b/sound/soc/omap/Makefile
@@ -18,6 +18,7 @@ snd-soc-omap3pandora-objs := omap3pandora.o
snd-soc-omap3beagle-objs := omap3beagle.o
snd-soc-zoom2-objs := zoom2.o
snd-soc-igep0020-objs := igep0020.o
+snd-soc-wl1271bt-objs := wl1271bt.o

obj-$(CONFIG_SND_OMAP_SOC_N810) += snd-soc-n810.o
obj-$(CONFIG_SND_OMAP_SOC_AMS_DELTA) += snd-soc-ams-delta.o
@@ -31,3 +32,4 @@ obj-$(CONFIG_SND_OMAP_SOC_OMAP3_PANDORA) += snd-soc-omap3pandora.o
obj-$(CONFIG_SND_OMAP_SOC_OMAP3_BEAGLE) += snd-soc-omap3beagle.o
obj-$(CONFIG_SND_OMAP_SOC_ZOOM2) += snd-soc-zoom2.o
obj-$(CONFIG_SND_OMAP_SOC_IGEP0020) += snd-soc-igep0020.o
+obj-$(CONFIG_SND_OMAP_SOC_WL1271BT) += snd-soc-wl1271bt.o
diff --git a/sound/soc/omap/omap3evm.c b/sound/soc/omap/omap3evm.c
index dfcb344..6731ad3 100644
--- a/sound/soc/omap/omap3evm.c
+++ b/sound/soc/omap/omap3evm.c
@@ -32,6 +32,10 @@
#include "omap-mcbsp.h"
#include "omap-pcm.h"
#include "../codecs/twl4030.h"
+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+#include <plat/control.h>
+#include "wl1271bt.h"
+#endif

static int omap3evm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
@@ -72,11 +76,58 @@ static int omap3evm_hw_params(struct snd_pcm_substream *substream,
return 0;
}

+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+static int omap3evm_wl1271bt_pcm_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 ret;
+
+ /* Set cpu DAI configuration for WL1271 Bluetooth codec */
+ ret = snd_soc_dai_set_fmt(cpu_dai,
+ SND_SOC_DAIFMT_DSP_B |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM);
+ if (ret < 0) {
+ printk(KERN_ERR "Can't set cpu DAI configuration for " \
+ "WL1271 Bluetooth codec \n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_ops omap3evm_wl1271bt_pcm_ops = {
+ .hw_params = omap3evm_wl1271bt_pcm_hw_params,
+};
+#endif
+
static struct snd_soc_ops omap3evm_ops = {
+
.hw_params = omap3evm_hw_params,
};

/* Digital audio interface glue - connects codec <--> CPU */
+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+static struct snd_soc_dai_link omap3evm_dai[] = {
+ {
+ .name = "TWL4030",
+ .stream_name = "TWL4030",
+ .cpu_dai = &omap_mcbsp_dai[0],
+ .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
+ .ops = &omap3evm_ops,
+ },
+ /* Connects WL1271 Bluetooth codec <--> CPU */
+ {
+ .name = "WL1271BTPCM",
+ .stream_name = "WL1271 BT PCM",
+ .cpu_dai = &omap_mcbsp_dai[1],
+ .codec_dai = &wl1271bt_dai,
+ .ops = &omap3evm_wl1271bt_pcm_ops,
+ },
+};
+#else
static struct snd_soc_dai_link omap3evm_dai = {
.name = "TWL4030",
.stream_name = "TWL4030",
@@ -84,13 +135,18 @@ static struct snd_soc_dai_link omap3evm_dai = {
.codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
.ops = &omap3evm_ops,
};
-
+#endif
/* Audio machine driver */
static struct snd_soc_card snd_soc_omap3evm = {
.name = "omap3evm",
.platform = &omap_soc_platform,
+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+ .dai_link = &omap3evm_dai[0],
+ .num_links = ARRAY_SIZE(omap3evm_dai),
+#else
.dai_link = &omap3evm_dai,
.num_links = 1,
+#endif
};

/* twl4030 setup */
@@ -111,7 +167,10 @@ static struct platform_device *omap3evm_snd_device;
static int __init omap3evm_soc_init(void)
{
int ret;
-
+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+ u16 reg;
+ u32 val;
+#endif
if (!machine_is_omap3evm()) {
pr_err("Not OMAP3 EVM!\n");
return -ENODEV;
@@ -124,9 +183,27 @@ static int __init omap3evm_soc_init(void)
return -ENOMEM;
}

+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+/*
+ * Set DEVCONF0 register to connect
+ * MCBSP1_CLKR -> MCBSP1_CLKX & MCBSP1_FSR -> MCBSP1_FSX
+ */
+ reg = OMAP2_CONTROL_DEVCONF0;
+ val = omap_ctrl_readl(reg);
+ val = val | 0x18;
+ omap_ctrl_writel(val, reg);
+#endif
+
platform_set_drvdata(omap3evm_snd_device, &omap3evm_snd_devdata);
omap3evm_snd_devdata.dev = &omap3evm_snd_device->dev;
+#if defined(CONFIG_SND_OMAP_SOC_WL1271BT)
+ /* McBSP2 */
+ *(unsigned int *)omap3evm_dai[0].cpu_dai->private_data = 1;
+ /* McBSP1 */
+ *(unsigned int *)omap3evm_dai[1].cpu_dai->private_data = 0;
+#else
*(unsigned int *)omap3evm_dai.cpu_dai->private_data = 1;
+#endif

ret = platform_device_add(omap3evm_snd_device);
if (ret)
diff --git a/sound/soc/omap/wl1271bt.c b/sound/soc/omap/wl1271bt.c
new file mode 100644
index 0000000..b41895b
--- /dev/null
+++ b/sound/soc/omap/wl1271bt.c
@@ -0,0 +1,59 @@
+/*
+ * wl1271bt.c -- ALSA SoC WL1271 Bluetooth codec driver for omap3evm board
+ *
+ * Author: Sinoj M. Issac, <sinoj at mistralsolutions.com>
+ *
+ * Based on sound/soc/codecs/twl4030.c by Steve Sakoman
+ *
+ * This file provides stub codec that can be used on OMAP3530 evm to
+ * send/receive voice samples to/from WL1271 Bluetooth chip over PCM interface.
+ * The Bluetoothchip codec interface is configured by HCI commands. ALSA is
+ * configured and aligned to the codec interface.
+ *
+ * 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 <sound/soc.h>
+#include <sound/pcm.h>
+
+/*
+ * Since WL1271 PCM interface is intended for Voice,
+ * Support sampling rate 8K only
+ */
+#define WL1271BT_RATES SNDRV_PCM_RATE_8000
+#define WL1271BT_FORMATS SNDRV_PCM_FMTBIT_S16_LE
+
+struct snd_soc_dai wl1271bt_dai = {
+ .name = "wl1271bt",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = WL1271BT_RATES,
+ .formats = WL1271BT_FORMATS,},
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = WL1271BT_RATES,
+ .formats = WL1271BT_FORMATS,},
+};
+
+static int __init wl1271bt_modinit(void)
+{
+ /* Register number of DAIs (wl1271bt_dai) with the ASoC core */
+ return snd_soc_register_dais(&wl1271bt_dai, 1);
+}
+
+static void __exit wl1271bt_modexit(void)
+{
+ /* Unregister number of DAIs (wl1271bt_dai) from the ASoC core */
+ snd_soc_unregister_dais(&wl1271bt_dai, 1);
+}
+
+module_init(wl1271bt_modinit);
+module_exit(wl1271bt_modexit);
diff --git a/sound/soc/omap/wl1271bt.h b/sound/soc/omap/wl1271bt.h
new file mode 100644
index 0000000..769f9a9
--- /dev/null
+++ b/sound/soc/omap/wl1271bt.h
@@ -0,0 +1,16 @@
+/*
+ * wl1271bt.h -- ALSA SoC WL1271 Bluetooth codec driver header
+ *
+ * Author: Sinoj M. Issac, <sinoj at mistralsolutions.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.
+ */
+
+#ifndef WL1271BT_H
+#define WL1271BT_H
+
+extern struct snd_soc_dai wl1271bt_dai;
+
+#endif /* WL1271BT_H */