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 <vbarinov@ru.mvista.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
source "sound/soc/s3c24xx/Kconfig"
source "sound/soc/sh/Kconfig"
source "sound/soc/fsl/Kconfig"
+source "sound/soc/davinci/Kconfig"
# Supported codecs
source "sound/soc/codecs/Kconfig"
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/ fsl/
+obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/ davinci/
--- /dev/null
+config SND_DAVINCI_SOC
+ tristate "SoC Audio for the TI DAVINCI chip"
+ depends on ARCH_DAVINCI && SND_SOC
+ help
+ Say Y or M if you want to add support for codecs attached to
+ the DAVINCI AC97 or I2S interface. You will also need
+ to select the audio interfaces to support below.
+
+config SND_DAVINCI_SOC_I2S
+ tristate
+
+config SND_DAVINCI_SOC_EVM
+ tristate "SoC Audio support for DaVinci EVM"
+ depends on SND_DAVINCI_SOC && MACH_DAVINCI_EVM
+ select SND_DAVINCI_SOC_I2S
+ select SND_SOC_TLV320AIC3X
+ help
+ Say Y if you want to add support for SoC audio on TI
+ DaVinci EVM platform.
--- /dev/null
+# DAVINCI Platform Support
+snd-soc-davinci-objs := davinci-pcm.o
+snd-soc-davinci-i2s-objs := davinci-i2s.o
+
+obj-$(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
--- /dev/null
+/*
+ * ASoC driver for TI DAVINCI EVM platform
+ *
+ * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
+ * 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 <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");
--- /dev/null
+/*
+ * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
+ * 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/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");
--- /dev/null
+/*
+ * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
+ * 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.
+ */
+
+#ifndef _DAVINCI_I2S_H
+#define _DAVINCI_I2S_H
+
+extern struct snd_soc_cpu_dai davinci_i2s_dai;
+
+#endif
--- /dev/null
+/*
+ * ALSA PCM interface for the TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
+ * 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/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");
--- /dev/null
+/*
+ * ALSA PCM interface for the TI DAVINCI processor
+ *
+ * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
+ * 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.
+ */
+
+#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
projects / linux-2.6 / commitdiff