While searching something different, I just found
http://www.spinics.net/lists/alsa-devel/msg12535.html
As I'm not subscribed to alsa-devel, I don't have the original post.
Maybe any of the authors can post it do this list as well?
The patch mainly applies to our git. I fixed two small rejects in
Kconfig and Makefile as the patch is for newer kernel than our git.
Untested patch against our git in attachment. Anybody likes to test?
Dirk
Add ASoC support for the TI Davinci SoC and the Davicni-EVM reference board.
It includes:
- ASoC Davinci DMA driver
- ASoC Davinci I2S (Davinci McBSP module based) driver
- ASoC Davinci-EVM reference board
Signed-off-by: Vladimir Barinov <[EMAIL PROTECTED]>
Index: linux-davinci/sound/soc/davinci/Makefile
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/Makefile
@@ -0,0 +1,11 @@
+# DAVINCI Platform Support
+snd-soc-davinci-objs := davinci-pcm.o
+snd-soc-davinci-i2s-objs := davinci-i2s.o
+
+obj-$(CONFIG_SND_DAVINCI_SOC) += snd-soc-davinci.o
+obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o
+
+# DAVINCI Machine Support
+snd-soc-evm-objs := davinci-evm.o
+
+obj-$(CONFIG_SND_DAVINCI_SOC_EVM) += snd-soc-evm.o
Index: linux-davinci/sound/soc/davinci/davinci-evm.c
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/davinci-evm.c
@@ -0,0 +1,208 @@
+/*
+ * ASoC driver for TI DAVINCI EVM platform
+ *
+ * Author: Vladimir Barinov, <[EMAIL PROTECTED]>
+ * Copyright: (C) 2007 MontaVista Software, Inc., <[EMAIL PROTECTED]>
+ *
+ * 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 <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+#include <asm/dma.h>
+#include <asm/arch/hardware.h>
+
+#include "../codecs/tlv320aic3x.h"
+#include "davinci-pcm.h"
+#include "davinci-i2s.h"
+
+#define EVM_CODEC_CLOCK 22579200
+
+static int evm_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_codec_dai *codec_dai = rtd->dai->codec_dai;
+ struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+ int ret = 0;
+
+ /* set codec DAI configuration */
+ ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+ 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_CBM_CFM |
+ SND_SOC_DAIFMT_IB_NF);
+ if (ret < 0)
+ return ret;
+
+ /* set the codec system clock */
+ ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
+ SND_SOC_CLOCK_OUT);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct snd_soc_ops evm_ops = {
+ .hw_params = evm_hw_params,
+};
+
+/* davinci-evm machine dapm widgets */
+static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_LINE("Line Out", NULL),
+ SND_SOC_DAPM_MIC("Mic Jack", NULL),
+ SND_SOC_DAPM_LINE("Line In", NULL),
+};
+
+/* davinci-evm machine audio_mapnections to the codec pins */
+static const char *audio_map[][3] = {
+ /* Headphone connected to HPLOUT, HPROUT */
+ {"Headphone Jack", NULL, "HPLOUT"},
+ {"Headphone Jack", NULL, "HPROUT"},
+
+ /* Line Out connected to LLOUT, RLOUT */
+ {"Line Out", NULL, "LLOUT"},
+ {"Line Out", NULL, "RLOUT"},
+
+ /* Mic connected to (MIC3L | MIC3R) */
+ {"MIC3L", NULL, "Mic Bias 2V"},
+ {"MIC3R", NULL, "Mic Bias 2V"},
+ {"Mic Bias 2V", NULL, "Mic Jack"},
+
+ /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
+ {"LINE1L", NULL, "Line In"},
+ {"LINE2L", NULL, "Line In"},
+ {"LINE1R", NULL, "Line In"},
+ {"LINE2R", NULL, "Line In"},
+
+ {NULL, NULL, NULL},
+};
+
+/* Logic for a aic3x as connected on a davinci-evm */
+static int evm_aic3x_init(struct snd_soc_codec *codec)
+{
+ int i;
+
+ /* Add davinci-evm specific widgets */
+ for (i = 0; i < ARRAY_SIZE(aic3x_dapm_widgets); i++)
+ snd_soc_dapm_new_control(codec, &aic3x_dapm_widgets[i]);
+
+ /* Set up davinci-evm specific audio path audio_map */
+ for (i = 0; audio_map[i][0] != NULL; i++)
+ snd_soc_dapm_connect_input(codec, audio_map[i][0],
+ audio_map[i][1], audio_map[i][2]);
+
+ /* not connected */
+ snd_soc_dapm_set_endpoint(codec, "MONO_LOUT", 0);
+ snd_soc_dapm_set_endpoint(codec, "HPLCOM", 0);
+ snd_soc_dapm_set_endpoint(codec, "HPRCOM", 0);
+
+ /* always connected */
+ snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
+ snd_soc_dapm_set_endpoint(codec, "Line Out", 1);
+ snd_soc_dapm_set_endpoint(codec, "Mic Jack", 1);
+ snd_soc_dapm_set_endpoint(codec, "Line In", 1);
+
+ snd_soc_dapm_sync_endpoints(codec);
+
+ return 0;
+}
+
+/* davinci-evm digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link evm_dai = {
+ .name = "TLV320AIC3X",
+ .stream_name = "AIC3X",
+ .cpu_dai = &davinci_i2s_dai,
+ .codec_dai = &aic3x_dai,
+ .init = evm_aic3x_init,
+ .ops = &evm_ops,
+};
+
+/* davinci-evm audio machine driver */
+static struct snd_soc_machine snd_soc_machine_evm = {
+ .name = "DaVinci EVM",
+ .dai_link = &evm_dai,
+ .num_links = 1,
+};
+
+/* evm audio private data */
+static struct aic3x_setup_data evm_aic3x_setup = {
+ .i2c_address = 0x1b,
+};
+
+/* evm audio subsystem */
+static struct snd_soc_device evm_snd_devdata = {
+ .machine = &snd_soc_machine_evm,
+ .platform = &davinci_soc_platform,
+ .codec_dev = &soc_codec_dev_aic3x,
+ .codec_data = &evm_aic3x_setup,
+};
+
+static struct resource evm_snd_resources[] = {
+ {
+ .start = DAVINCI_MCBSP_BASE,
+ .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct evm_snd_platform_data evm_snd_data = {
+ .tx_dma_ch = DM644X_DMACH_MCBSP_TX,
+ .rx_dma_ch = DM644X_DMACH_MCBSP_RX,
+};
+
+static struct platform_device *evm_snd_device;
+
+static int __init evm_init(void)
+{
+ int ret;
+
+ evm_snd_device = platform_device_alloc("soc-audio", 0);
+ if (!evm_snd_device)
+ return -ENOMEM;
+
+ platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
+ evm_snd_devdata.dev = &evm_snd_device->dev;
+ evm_snd_device->dev.platform_data = &evm_snd_data;
+
+ ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
+ ARRAY_SIZE(evm_snd_resources));
+ if (ret) {
+ platform_device_put(evm_snd_device);
+ return ret;
+ }
+
+ ret = platform_device_add(evm_snd_device);
+ if (ret)
+ platform_device_put(evm_snd_device);
+
+ return ret;
+}
+
+static void __exit evm_exit(void)
+{
+ platform_device_unregister(evm_snd_device);
+}
+
+module_init(evm_init);
+module_exit(evm_exit);
+
+MODULE_AUTHOR("Vladimir Barinov");
+MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
+MODULE_LICENSE("GPL");
Index: linux-davinci/sound/soc/davinci/davinci-i2s.c
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/davinci-i2s.c
@@ -0,0 +1,407 @@
+/*
+ * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <[EMAIL PROTECTED]>
+ * Copyright: (C) 2007 MontaVista Software, Inc., <[EMAIL PROTECTED]>
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "davinci-pcm.h"
+
+#define DAVINCI_MCBSP_DRR_REG 0x00
+#define DAVINCI_MCBSP_DXR_REG 0x04
+#define DAVINCI_MCBSP_SPCR_REG 0x08
+#define DAVINCI_MCBSP_RCR_REG 0x0c
+#define DAVINCI_MCBSP_XCR_REG 0x10
+#define DAVINCI_MCBSP_SRGR_REG 0x14
+#define DAVINCI_MCBSP_PCR_REG 0x24
+
+#define DAVINCI_MCBSP_SPCR_RRST (1 << 0)
+#define DAVINCI_MCBSP_SPCR_RINTM(v) ((v) << 4)
+#define DAVINCI_MCBSP_SPCR_XRST (1 << 16)
+#define DAVINCI_MCBSP_SPCR_XINTM(v) ((v) << 20)
+#define DAVINCI_MCBSP_SPCR_GRST (1 << 22)
+#define DAVINCI_MCBSP_SPCR_FRST (1 << 23)
+#define DAVINCI_MCBSP_SPCR_FREE (1 << 25)
+
+#define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5)
+#define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8)
+#define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16)
+#define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21)
+
+#define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5)
+#define DAVINCI_MCBSP_XCR_XFRLEN1(v) ((v) << 8)
+#define DAVINCI_MCBSP_XCR_XDATDLY(v) ((v) << 16)
+#define DAVINCI_MCBSP_XCR_XFIG (1 << 18)
+#define DAVINCI_MCBSP_XCR_XWDLEN2(v) ((v) << 21)
+
+#define DAVINCI_MCBSP_SRGR_FWID(v) ((v) << 8)
+#define DAVINCI_MCBSP_SRGR_FPER(v) ((v) << 16)
+#define DAVINCI_MCBSP_SRGR_FSGM (1 << 28)
+
+#define DAVINCI_MCBSP_PCR_CLKRP (1 << 0)
+#define DAVINCI_MCBSP_PCR_CLKXP (1 << 1)
+#define DAVINCI_MCBSP_PCR_FSRP (1 << 2)
+#define DAVINCI_MCBSP_PCR_FSXP (1 << 3)
+#define DAVINCI_MCBSP_PCR_CLKRM (1 << 8)
+#define DAVINCI_MCBSP_PCR_CLKXM (1 << 9)
+#define DAVINCI_MCBSP_PCR_FSRM (1 << 10)
+#define DAVINCI_MCBSP_PCR_FSXM (1 << 11)
+
+#define MOD_REG_BIT(val, mask, set) do { \
+ if (set) { \
+ val |= mask; \
+ } else { \
+ val &= ~mask; \
+ } \
+} while (0)
+
+enum {
+ DAVINCI_MCBSP_WORD_8 = 0,
+ DAVINCI_MCBSP_WORD_12,
+ DAVINCI_MCBSP_WORD_16,
+ DAVINCI_MCBSP_WORD_20,
+ DAVINCI_MCBSP_WORD_24,
+ DAVINCI_MCBSP_WORD_32,
+};
+
+static struct davinci_pcm_dma_params davinci_i2s_pcm_out = {
+ .name = "I2S PCM Stereo out",
+};
+
+static struct davinci_pcm_dma_params davinci_i2s_pcm_in = {
+ .name = "I2S PCM Stereo in",
+};
+
+struct davinci_mcbsp_dev {
+ void __iomem *base;
+ struct clk *clk;
+ struct davinci_pcm_dma_params *dma_params[2];
+};
+
+static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
+ int reg, u32 val)
+{
+ __raw_writel(val, dev->base + reg);
+}
+
+static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int
reg)
+{
+ return __raw_readl(dev->base + reg);
+}
+
+static void davinci_mcbsp_start(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
+ u32 w;
+
+ /* Start the sample generator and enable transmitter/receiver */
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST, 1);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1);
+ else
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
+
+ /* Start frame sync */
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_FRST, 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
+}
+
+static void davinci_mcbsp_stop(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
+ u32 w;
+
+ /* Reset transmitter/receiver and sample rate/frame sync generators */
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST |
+ DAVINCI_MCBSP_SPCR_FRST, 0);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0);
+ else
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 0);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
+}
+
+static int davinci_i2s_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+ struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
+
+ cpu_dai->dma_data = dev->dma_params[substream->stream];
+
+ return 0;
+}
+
+static int davinci_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
+ unsigned int fmt)
+{
+ struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
+ u32 w;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG,
+ DAVINCI_MCBSP_PCR_FSXM |
+ DAVINCI_MCBSP_PCR_FSRM |
+ DAVINCI_MCBSP_PCR_CLKXM |
+ DAVINCI_MCBSP_PCR_CLKRM);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG,
+ DAVINCI_MCBSP_SRGR_FSGM);
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_IB_NF:
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_CLKXP |
+ DAVINCI_MCBSP_PCR_CLKRP, 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_FSXP |
+ DAVINCI_MCBSP_PCR_FSRP, 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_CLKXP |
+ DAVINCI_MCBSP_PCR_CLKRP |
+ DAVINCI_MCBSP_PCR_FSXP |
+ DAVINCI_MCBSP_PCR_FSRP, 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
+ break;
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct davinci_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
+ struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
+ struct snd_interval *i = NULL;
+ int mcbsp_word_length;
+ u32 w;
+
+ /* general line settings */
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG,
+ DAVINCI_MCBSP_SPCR_RINTM(3) |
+ DAVINCI_MCBSP_SPCR_XINTM(3) |
+ DAVINCI_MCBSP_SPCR_FREE);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG,
+ DAVINCI_MCBSP_RCR_RFRLEN1(1) |
+ DAVINCI_MCBSP_RCR_RDATDLY(1));
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG,
+ DAVINCI_MCBSP_XCR_XFRLEN1(1) |
+ DAVINCI_MCBSP_XCR_XDATDLY(1) |
+ DAVINCI_MCBSP_XCR_XFIG);
+
+ i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SRGR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1), 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
+
+ i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS);
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SRGR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1), 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
+
+ /* Determine xfer data type */
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ dma_params->data_type = 1;
+ mcbsp_word_length = DAVINCI_MCBSP_WORD_8;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ dma_params->data_type = 2;
+ mcbsp_word_length = DAVINCI_MCBSP_WORD_16;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ dma_params->data_type = 4;
+ mcbsp_word_length = DAVINCI_MCBSP_WORD_32;
+ break;
+ default:
+ printk(KERN_WARNING "davinci-i2s: unsupported PCM format");
+ return -EINVAL;
+ }
+
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) |
+ DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length), 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, w);
+
+ w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG);
+ MOD_REG_BIT(w, DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) |
+ DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length), 1);
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, w);
+
+ return 0;
+}
+
+static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ davinci_mcbsp_start(substream);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ davinci_mcbsp_stop(substream);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int davinci_i2s_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_machine *machine = socdev->machine;
+ struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[pdev->id].cpu_dai;
+ struct davinci_mcbsp_dev *dev;
+ struct resource *mem, *ioarea;
+ struct evm_snd_platform_data *pdata;
+ int ret;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "no mem resource?\n");
+ return -ENODEV;
+ }
+
+ ioarea = request_mem_region(mem->start, (mem->end - mem->start) + 1,
+ pdev->name);
+ if (!ioarea) {
+ dev_err(&pdev->dev, "McBSP region already claimed\n");
+ return -EBUSY;
+ }
+
+ dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL);
+ if (!dev) {
+ ret = -ENOMEM;
+ goto err_release_region;
+ }
+
+ cpu_dai->private_data = dev;
+
+ dev->clk = clk_get(&pdev->dev, "McBSPCLK");
+ if (IS_ERR(dev->clk)) {
+ ret = -ENODEV;
+ goto err_free_mem;
+ }
+ clk_enable(dev->clk);
+
+ dev->base = (void __iomem *)IO_ADDRESS(mem->start);
+ pdata = pdev->dev.platform_data;
+
+ dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK] = &davinci_i2s_pcm_out;
+ dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = pdata->tx_dma_ch;
+ dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->dma_addr =
+ (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG);
+
+ dev->dma_params[SNDRV_PCM_STREAM_CAPTURE] = &davinci_i2s_pcm_in;
+ dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = pdata->rx_dma_ch;
+ dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->dma_addr =
+ (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG);
+
+ return 0;
+
+err_free_mem:
+ kfree(dev);
+err_release_region:
+ release_mem_region(mem->start, (mem->end - mem->start) + 1);
+
+ return ret;
+}
+
+static void davinci_i2s_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_machine *machine = socdev->machine;
+ struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[pdev->id].cpu_dai;
+ struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
+ struct resource *mem;
+
+ clk_disable(dev->clk);
+ clk_put(dev->clk);
+ dev->clk = NULL;
+
+ kfree(dev);
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(mem->start, (mem->end - mem->start) + 1);
+}
+
+#define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000
+
+struct snd_soc_cpu_dai davinci_i2s_dai = {
+ .name = "davinci-i2s",
+ .id = 0,
+ .type = SND_SOC_DAI_I2S,
+ .probe = davinci_i2s_probe,
+ .remove = davinci_i2s_remove,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = DAVINCI_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = DAVINCI_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .ops = {
+ .startup = davinci_i2s_startup,
+ .trigger = davinci_i2s_trigger,
+ .hw_params = davinci_i2s_hw_params,},
+ .dai_ops = {
+ .set_fmt = davinci_i2s_set_dai_fmt,
+ },
+};
+EXPORT_SYMBOL_GPL(davinci_i2s_dai);
+
+MODULE_AUTHOR("Vladimir Barinov");
+MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface");
+MODULE_LICENSE("GPL");
Index: linux-davinci/sound/soc/davinci/davinci-i2s.h
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/davinci-i2s.h
@@ -0,0 +1,17 @@
+/*
+ * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <[EMAIL PROTECTED]>
+ * Copyright: (C) 2007 MontaVista Software, Inc., <[EMAIL PROTECTED]>
+ *
+ * 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 _DAVINCI_I2S_H
+#define _DAVINCI_I2S_H
+
+extern struct snd_soc_cpu_dai davinci_i2s_dai;
+
+#endif
Index: linux-davinci/sound/soc/davinci/davinci-pcm.c
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/davinci-pcm.c
@@ -0,0 +1,389 @@
+/*
+ * ALSA PCM interface for the TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <[EMAIL PROTECTED]>
+ * Copyright: (C) 2007 MontaVista Software, Inc., <[EMAIL PROTECTED]>
+ *
+ * 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <asm/dma.h>
+
+#include "davinci-pcm.h"
+
+#define DAVINCI_PCM_DEBUG 0
+#if DAVINCI_PCM_DEBUG
+#define DPRINTK(x...) printk(KERN_DEBUG x)
+#else
+#define DPRINTK(x...)
+#endif
+
+static struct snd_pcm_hardware davinci_pcm_hardware = {
+ .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE),
+ .formats = (SNDRV_PCM_FMTBIT_S16_LE),
+ .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
+ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+ SNDRV_PCM_RATE_KNOT),
+ .rate_min = 8000,
+ .rate_max = 96000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 128 * 1024,
+ .period_bytes_min = 32,
+ .period_bytes_max = 8 * 1024,
+ .periods_min = 16,
+ .periods_max = 255,
+ .fifo_size = 0,
+};
+
+struct davinci_runtime_data {
+ spinlock_t lock;
+ int period; /* current DMA period */
+ int master_lch; /* Master DMA channel */
+ int slave_lch; /* Slave DMA channel */
+ struct davinci_pcm_dma_params *params; /* DMA params */
+};
+
+static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
+{
+ struct davinci_runtime_data *prtd = substream->runtime->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int lch = prtd->slave_lch;
+ unsigned int period_size;
+ unsigned int dma_offset;
+ dma_addr_t dma_pos;
+ dma_addr_t src, dst;
+ unsigned short src_bidx, dst_bidx;
+ unsigned int data_type;
+ unsigned int count;
+
+ period_size = snd_pcm_lib_period_bytes(substream);
+ dma_offset = prtd->period * period_size;
+ dma_pos = runtime->dma_addr + dma_offset;
+
+ DPRINTK("audio_set_dma_params_play channel = %d dma_ptr = %x "
+ "period_size=%x\n", lch, dma_pos, period_size);
+
+ data_type = prtd->params->data_type;
+ count = period_size / data_type;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ src = dma_pos;
+ dst = prtd->params->dma_addr;
+ src_bidx = data_type;
+ dst_bidx = 0;
+ } else {
+ src = prtd->params->dma_addr;
+ dst = dma_pos;
+ src_bidx = 0;
+ dst_bidx = data_type;
+ }
+
+ davinci_set_dma_src_params(lch, src, INCR, W8BIT);
+ davinci_set_dma_dest_params(lch, dst, INCR, W8BIT);
+ davinci_set_dma_src_index(lch, src_bidx, 0);
+ davinci_set_dma_dest_index(lch, dst_bidx, 0);
+ davinci_set_dma_transfer_params(lch, data_type, count, 1, 0, ASYNC);
+
+ prtd->period++;
+ if (unlikely(prtd->period >= runtime->periods))
+ prtd->period = 0;
+}
+
+static void davinci_pcm_dma_irq(int lch, u16 ch_status, void *data)
+{
+ struct snd_pcm_substream *substream = data;
+ struct davinci_runtime_data *prtd = substream->runtime->private_data;
+
+ DPRINTK("lch=%d, status=0x%x\n", lch, ch_status);
+
+ if (unlikely(ch_status != DMA_COMPLETE))
+ return;
+
+ if (snd_pcm_running(substream)) {
+ snd_pcm_period_elapsed(substream);
+
+ spin_lock(&prtd->lock);
+ davinci_pcm_enqueue_dma(substream);
+ spin_unlock(&prtd->lock);
+ }
+}
+
+static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
+{
+ struct davinci_runtime_data *prtd = substream->runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct davinci_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
+ int tcc = TCC_ANY;
+ int ret;
+
+ if (!dma_data)
+ return -ENODEV;
+
+ prtd->params = dma_data;
+
+ /* Request master DMA channel */
+ ret = davinci_request_dma(prtd->params->channel, prtd->params->name,
+ davinci_pcm_dma_irq, substream,
+ &prtd->master_lch, &tcc, EVENTQ_0);
+ if (ret)
+ return ret;
+
+ /* Request slave DMA channel */
+ ret = davinci_request_dma(PARAM_ANY, "Link",
+ NULL, NULL, &prtd->slave_lch, &tcc, EVENTQ_0);
+ if (ret) {
+ davinci_free_dma(prtd->master_lch);
+ return ret;
+ }
+
+ /* Link slave DMA channel in loopback */
+ davinci_dma_link_lch(prtd->slave_lch, prtd->slave_lch);
+
+ return 0;
+}
+
+static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct davinci_runtime_data *prtd = substream->runtime->private_data;
+ int ret = 0;
+
+ spin_lock(&prtd->lock);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ davinci_start_dma(prtd->master_lch);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ davinci_stop_dma(prtd->master_lch);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ spin_unlock(&prtd->lock);
+
+ return ret;
+}
+
+static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct davinci_runtime_data *prtd = substream->runtime->private_data;
+ struct paramentry_descriptor temp;
+
+ prtd->period = 0;
+ davinci_pcm_enqueue_dma(substream);
+
+ /* Get slave channel dma params for master channel startup */
+ davinci_get_dma_params(prtd->slave_lch, &temp);
+ davinci_set_dma_params(prtd->master_lch, &temp);
+
+ return 0;
+}
+
+static snd_pcm_uframes_t
+davinci_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct davinci_runtime_data *prtd = runtime->private_data;
+ unsigned int offset;
+ dma_addr_t count;
+ dma_addr_t src, dst;
+
+ spin_lock(&prtd->lock);
+
+ davinci_dma_getposition(prtd->master_lch, &src, &dst);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ count = src - runtime->dma_addr;
+ else
+ count = dst - runtime->dma_addr;;
+
+ spin_unlock(&prtd->lock);
+
+ offset = bytes_to_frames(runtime, count);
+ if (offset >= runtime->buffer_size)
+ offset = 0;
+
+ return offset;
+}
+
+static int davinci_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct davinci_runtime_data *prtd;
+ int ret = 0;
+
+ snd_soc_set_runtime_hwparams(substream, &davinci_pcm_hardware);
+
+ prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL);
+ if (prtd == NULL)
+ return -ENOMEM;
+
+ spin_lock_init(&prtd->lock);
+
+ runtime->private_data = prtd;
+
+ ret = davinci_pcm_dma_request(substream);
+ if (ret) {
+ printk(KERN_ERR "davinci_pcm: Failed to get dma channels\n");
+ kfree(prtd);
+ }
+
+ return ret;
+}
+
+static int davinci_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct davinci_runtime_data *prtd = runtime->private_data;
+
+ davinci_dma_unlink_lch(prtd->slave_lch, prtd->slave_lch);
+
+ davinci_free_dma(prtd->slave_lch);
+ davinci_free_dma(prtd->master_lch);
+
+ kfree(prtd);
+
+ return 0;
+}
+
+static int davinci_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ return snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+}
+
+static int davinci_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static int davinci_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ return dma_mmap_writecombine(substream->pcm->card->dev, vma,
+ runtime->dma_area,
+ runtime->dma_addr,
+ runtime->dma_bytes);
+}
+
+struct snd_pcm_ops davinci_pcm_ops = {
+ .open = davinci_pcm_open,
+ .close = davinci_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = davinci_pcm_hw_params,
+ .hw_free = davinci_pcm_hw_free,
+ .prepare = davinci_pcm_prepare,
+ .trigger = davinci_pcm_trigger,
+ .pointer = davinci_pcm_pointer,
+ .mmap = davinci_pcm_mmap,
+};
+
+static int davinci_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+{
+ struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+ struct snd_dma_buffer *buf = &substream->dma_buffer;
+ size_t size = davinci_pcm_hardware.buffer_bytes_max;
+
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = pcm->card->dev;
+ buf->private_data = NULL;
+ buf->area = dma_alloc_writecombine(pcm->card->dev, size,
+ &buf->addr, GFP_KERNEL);
+
+ DPRINTK("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
+ (void *) buf->area, (void *) buf->addr, size);
+
+ if (!buf->area)
+ return -ENOMEM;
+
+ buf->bytes = size;
+ return 0;
+}
+
+static void davinci_pcm_free(struct snd_pcm *pcm)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_dma_buffer *buf;
+ int stream;
+
+ for (stream = 0; stream < 2; stream++) {
+ substream = pcm->streams[stream].substream;
+ if (!substream)
+ continue;
+
+ buf = &substream->dma_buffer;
+ if (!buf->area)
+ continue;
+
+ dma_free_writecombine(pcm->card->dev, buf->bytes,
+ buf->area, buf->addr);
+ buf->area = NULL;
+ }
+}
+
+static u64 davinci_pcm_dmamask = 0xffffffff;
+
+static int davinci_pcm_new(struct snd_card *card,
+ struct snd_soc_codec_dai *dai, struct snd_pcm *pcm)
+{
+ int ret;
+
+ if (!card->dev->dma_mask)
+ card->dev->dma_mask = &davinci_pcm_dmamask;
+ if (!card->dev->coherent_dma_mask)
+ card->dev->coherent_dma_mask = 0xffffffff;
+
+ if (dai->playback.channels_min) {
+ ret = davinci_pcm_preallocate_dma_buffer(pcm,
+ SNDRV_PCM_STREAM_PLAYBACK);
+ if (ret)
+ return ret;
+ }
+
+ if (dai->capture.channels_min) {
+ ret = davinci_pcm_preallocate_dma_buffer(pcm,
+ SNDRV_PCM_STREAM_CAPTURE);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+struct snd_soc_platform davinci_soc_platform = {
+ .name = "davinci-audio",
+ .pcm_ops = &davinci_pcm_ops,
+ .pcm_new = davinci_pcm_new,
+ .pcm_free = davinci_pcm_free,
+};
+EXPORT_SYMBOL_GPL(davinci_soc_platform);
+
+MODULE_AUTHOR("Vladimir Barinov");
+MODULE_DESCRIPTION("TI DAVINCI PCM DMA module");
+MODULE_LICENSE("GPL");
Index: linux-davinci/sound/soc/davinci/davinci-pcm.h
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/davinci-pcm.h
@@ -0,0 +1,29 @@
+/*
+ * ALSA PCM interface for the TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <[EMAIL PROTECTED]>
+ * Copyright: (C) 2007 MontaVista Software, Inc., <[EMAIL PROTECTED]>
+ *
+ * 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 _DAVINCI_PCM_H
+#define _DAVINCI_PCM_H
+
+struct davinci_pcm_dma_params {
+ char *name; /* stream identifier */
+ int channel; /* sync dma channel ID */
+ dma_addr_t dma_addr; /* device physical address for DMA */
+ unsigned int data_type; /* xfer data type */
+};
+
+struct evm_snd_platform_data {
+ int tx_dma_ch;
+ int rx_dma_ch;
+};
+
+extern struct snd_soc_platform davinci_soc_platform;
+
+#endif
Index: linux-davinci/sound/soc/Kconfig
===================================================================
--- linux-davinci.orig/sound/soc/Kconfig
+++ linux-davinci/sound/soc/Kconfig
@@ -28,6 +28,7 @@ source "sound/soc/at91/Kconfig"
source "sound/soc/pxa/Kconfig"
source "sound/soc/s3c24xx/Kconfig"
source "sound/soc/sh/Kconfig"
+source "sound/soc/davinci/Kconfig"
# Supported codecs
source "sound/soc/codecs/Kconfig"
Index: linux-davinci/sound/soc/Makefile
===================================================================
--- linux-davinci.orig/sound/soc/Makefile
+++ linux-davinci/sound/soc/Makefile
@@ -1,4 +1,4 @@
snd-soc-core-objs := soc-core.o soc-dapm.o
obj-$(CONFIG_SND_SOC) += snd-soc-core.o
-obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/
+obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ davinci/
Index: linux-davinci/sound/soc/davinci/Kconfig
===================================================================
--- /dev/null
+++ linux-davinci/sound/soc/davinci/Kconfig
@@ -0,0 +1,19 @@
+config SND_DAVINCI_SOC
+ tristate "SoC Audio for the TI DAVINCI chip"
+ depends on ARCH_DAVINCI && SND_SOC
+ help
+ Say Y or M if you want to add support for codecs attached to
+ the DAVINCI AC97 or I2S interface. You will also need
+ to select the audio interfaces to support below.
+
+config SND_DAVINCI_SOC_I2S
+ tristate
+
+config SND_DAVINCI_SOC_EVM
+ tristate "SoC Audio support for DaVinci EVM"
+ depends on SND_DAVINCI_SOC && MACH_DAVINCI_EVM
+ select SND_DAVINCI_SOC_I2S
+ select SND_SOC_TLV320AIC3X
+ help
+ Say Y if you want to add support for SoC audio on TI
+ DaVinci EVM platform.
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