* [PATCH v2 2/5] ASoC: OMAP4: omap-dmic: Initial support for OMAP DMIC
2011-11-24 13:54 [PATCH v2 0/5] Support for OMAP4 Digital Microphone interface Peter Ujfalusi
2011-11-24 13:54 ` [PATCH v2 1/5] OMAP4: hwmod: Add names for DMIC memory address space Peter Ujfalusi
@ 2011-11-24 13:54 ` Peter Ujfalusi
2011-11-24 17:10 ` Mark Brown
2011-11-24 13:54 ` [PATCH v2 3/5] OMAP4: devices: Register OMAP4 DMIC platform device Peter Ujfalusi
` (2 subsequent siblings)
4 siblings, 1 reply; 9+ messages in thread
From: Peter Ujfalusi @ 2011-11-24 13:54 UTC (permalink / raw)
To: Mark Brown, Liam Girdwood, Tony Lindgren
Cc: alsa-devel, linux-omap, Benoit Cousson
Add support for OMAP4 Digital Microphone interface.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
sound/soc/omap/Kconfig | 3 +
sound/soc/omap/Makefile | 2 +
sound/soc/omap/omap-dmic.c | 509 ++++++++++++++++++++++++++++++++++++++++++++
sound/soc/omap/omap-dmic.h | 73 +++++++
4 files changed, 587 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/omap/omap-dmic.c
create mode 100644 sound/soc/omap/omap-dmic.h
diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index fe83d0d..052254a 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -2,6 +2,9 @@ config SND_OMAP_SOC
tristate "SoC Audio for the Texas Instruments OMAP chips"
depends on ARCH_OMAP
+config SND_OMAP_SOC_DMIC
+ tristate
+
config SND_OMAP_SOC_MCBSP
tristate
select OMAP_MCBSP
diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
index 052fd75..1fd723f 100644
--- a/sound/soc/omap/Makefile
+++ b/sound/soc/omap/Makefile
@@ -1,10 +1,12 @@
# OMAP Platform Support
snd-soc-omap-objs := omap-pcm.o
+snd-soc-omap-dmic-objs := omap-dmic.o
snd-soc-omap-mcbsp-objs := omap-mcbsp.o
snd-soc-omap-mcpdm-objs := omap-mcpdm.o
snd-soc-omap-hdmi-objs := omap-hdmi.o
obj-$(CONFIG_SND_OMAP_SOC) += snd-soc-omap.o
+obj-$(CONFIG_SND_OMAP_SOC_DMIC) += snd-soc-omap-dmic.o
obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o
obj-$(CONFIG_SND_OMAP_SOC_MCPDM) += snd-soc-omap-mcpdm.o
obj-$(CONFIG_SND_OMAP_SOC_HDMI) += snd-soc-omap-hdmi.o
diff --git a/sound/soc/omap/omap-dmic.c b/sound/soc/omap/omap-dmic.c
new file mode 100644
index 0000000..3ba08a1
--- /dev/null
+++ b/sound/soc/omap/omap-dmic.c
@@ -0,0 +1,509 @@
+/*
+ * omap-dmic.c -- OMAP ASoC DMIC DAI driver
+ *
+ * Copyright (C) 2010 - 2011 Texas Instruments
+ *
+ * Author: David Lambert <dlambert@ti.com>
+ * Misael Lopez Cruz <misael.lopez@ti.com>
+ * Liam Girdwood <lrg@ti.com>
+ * Peter Ujfalusi <peter.ujfalusi@ti.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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <plat/dma.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "omap-pcm.h"
+#include "omap-dmic.h"
+
+struct omap_dmic {
+ struct device *dev;
+ void __iomem *io_base;
+ struct clk *fclk;
+ int fclk_freq;
+ int sysclk;
+ int threshold;
+ u32 ch_enabled;
+ u32 clk_div;
+ struct mutex mutex;
+};
+
+/*
+ * Stream DMA parameters
+ */
+static struct omap_pcm_dma_data omap_dmic_dai_dma_params = {
+ .name = "DMIC capture",
+ .data_type = OMAP_DMA_DATA_TYPE_S32,
+ .sync_mode = OMAP_DMA_SYNC_PACKET,
+};
+
+static inline void omap_dmic_write(struct omap_dmic *dmic, u16 reg, u32 val)
+{
+ __raw_writel(val, dmic->io_base + reg);
+}
+
+static inline int omap_dmic_read(struct omap_dmic *dmic, u16 reg)
+{
+ return __raw_readl(dmic->io_base + reg);
+}
+
+static inline void omap_dmic_start(struct omap_dmic *dmic)
+{
+ u32 ctrl = omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG);
+
+ /* Configure DMA controller */
+ omap_dmic_write(dmic, OMAP_DMIC_DMAENABLE_SET_REG,
+ OMAP_DMIC_DMA_ENABLE);
+
+ omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, ctrl | dmic->ch_enabled);
+}
+
+static inline void omap_dmic_stop(struct omap_dmic *dmic)
+{
+ u32 ctrl = omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG);
+ omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG,
+ ctrl & ~OMAP_DMIC_UP_ENABLE_MASK);
+
+ /* Disable DMA request generation */
+ omap_dmic_write(dmic, OMAP_DMIC_DMAENABLE_CLR_REG,
+ OMAP_DMIC_DMA_ENABLE);
+
+}
+
+static inline int dmic_is_enabled(struct omap_dmic *dmic)
+{
+ return omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG) &
+ OMAP_DMIC_UP_ENABLE_MASK;
+}
+
+static int omap_dmic_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+ int ret = 0;
+
+ mutex_lock(&dmic->mutex);
+
+ if (!dai->active) {
+ pm_runtime_get_sync(dmic->dev);
+ snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
+ } else {
+ ret = -EBUSY;
+ }
+
+ mutex_unlock(&dmic->mutex);
+
+ return ret;
+}
+
+static void omap_dmic_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+ mutex_lock(&dmic->mutex);
+
+ if (!dai->active)
+ pm_runtime_put_sync(dmic->dev);
+
+ mutex_unlock(&dmic->mutex);
+}
+
+static int omap_dmic_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+ int channels;
+
+ /*
+ * 192KHz rate is only supported with 19.2MHz/3.84MHz clock
+ * configuration. Fix the dmic clock divider for 192KHz
+ */
+ if (params_rate(params) == 192000) {
+ if (dmic->fclk_freq == 19200000 && dmic->clk_div == 0x1) {
+ dmic->clk_div = 0x6;
+ } else {
+ dev_err(dmic->dev,
+ "invalid clock configuration for 192KHz\n");
+ return -EINVAL;
+ }
+ }
+
+ dmic->ch_enabled = 0;
+ channels = params_channels(params);
+ switch (channels) {
+ case 6:
+ dmic->ch_enabled |= OMAP_DMIC_UP3_ENABLE;
+ case 4:
+ dmic->ch_enabled |= OMAP_DMIC_UP2_ENABLE;
+ case 2:
+ dmic->ch_enabled |= OMAP_DMIC_UP1_ENABLE;
+ break;
+ default:
+ dev_err(dmic->dev, "invalid number of legacy channels\n");
+ return -EINVAL;
+ }
+
+ /* packet size is threshold * channels */
+ omap_dmic_dai_dma_params.packet_size = dmic->threshold * channels;
+ snd_soc_dai_set_dma_data(dai, substream, &omap_dmic_dai_dma_params);
+
+ return 0;
+}
+
+static int omap_dmic_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+ u32 ctrl;
+
+ /* Configure uplink threshold */
+ omap_dmic_write(dmic, OMAP_DMIC_FIFO_CTRL_REG, dmic->threshold);
+
+ ctrl = omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG);
+
+ /* Set dmic out format */
+ ctrl &= ~(OMAP_DMIC_FORMAT | OMAP_DMIC_POLAR_MASK);
+ ctrl |= (OMAP_DMICOUTFORMAT_LJUST | OMAP_DMIC_POLAR1 |
+ OMAP_DMIC_POLAR2 | OMAP_DMIC_POLAR3);
+
+ /* Configure dmic clock divider */
+ ctrl &= ~OMAP_DMIC_CLK_DIV_MASK;
+ ctrl |= OMAP_DMIC_CLK_DIV(dmic->clk_div);
+
+ omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, ctrl);
+
+ omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG,
+ ctrl | OMAP_DMICOUTFORMAT_LJUST |
+ OMAP_DMIC_POLAR1 | OMAP_DMIC_POLAR2 | OMAP_DMIC_POLAR3);
+
+ return 0;
+}
+
+static int omap_dmic_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ omap_dmic_start(dmic);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ omap_dmic_stop(dmic);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int omap_dmic_select_fclk(struct omap_dmic *dmic, int clk_id,
+ unsigned int freq)
+{
+ struct clk *parent_clk;
+ char *parent_clk_name;
+ int ret = 0;
+
+ switch (freq) {
+ case 12000000:
+ case 19200000:
+ case 24000000:
+ case 24576000:
+ break;
+ default:
+ dev_err(dmic->dev, "invalid input frequency: %dHz\n", freq);
+ return -EINVAL;
+ }
+
+ if (dmic->sysclk == clk_id) {
+ dmic->fclk_freq = freq;
+ return 0;
+ }
+
+ /* re-parent not allowed if a stream is ongoing */
+ if (dmic_is_enabled(dmic)) {
+ dev_err(dmic->dev, "can't re-parent when DMIC active\n");
+ return -EBUSY;
+ }
+
+ switch (clk_id) {
+ case OMAP_DMIC_SYSCLK_PAD_CLKS:
+ parent_clk_name = "pad_clks_ck";
+ break;
+ case OMAP_DMIC_SYSCLK_SLIMBLUS_CLKS:
+ parent_clk_name = "slimbus_clk";
+ break;
+ case OMAP_DMIC_SYSCLK_SYNC_MUX_CLKS:
+ parent_clk_name = "dmic_sync_mux_ck";
+ break;
+ default:
+ dev_err(dmic->dev, "clk_id not supported %d\n", clk_id);
+ return -EINVAL;
+ }
+
+ parent_clk = clk_get(dmic->dev, parent_clk_name);
+ if (IS_ERR(parent_clk)) {
+ dev_err(dmic->dev, "can't get %s\n", parent_clk_name);
+ return -ENODEV;
+ }
+
+ /* disable clock while reparenting */
+ pm_runtime_put_sync(dmic->dev);
+ ret = clk_set_parent(dmic->fclk, parent_clk);
+ pm_runtime_get_sync(dmic->dev);
+ if (ret < 0) {
+ dev_err(dmic->dev, "re-parent failed\n");
+ goto err_busy;
+ }
+
+ dmic->sysclk = clk_id;
+ dmic->fclk_freq = freq;
+
+err_busy:
+ clk_put(parent_clk);
+
+ return ret;
+}
+
+static int omap_dmic_select_divider(struct omap_dmic *dmic, unsigned int freq)
+{
+ dmic->clk_div = 0;
+ switch (freq) {
+ case 1536000:
+ if (dmic->fclk_freq != 24576000)
+ goto div_err;
+ dmic->clk_div = 0x4; /* Divider: 16 */
+ break;
+ case 2400000:
+ switch (dmic->fclk_freq) {
+ case 12000000:
+ dmic->clk_div = 0x5; /* Divider: 5 */
+ break;
+ case 19200000:
+ dmic->clk_div = 0x0; /* Divider: 8 */
+ break;
+ case 24000000:
+ dmic->clk_div = 0x2; /* Divider: 10 */
+ break;
+ default:
+ goto div_err;
+ }
+ break;
+ case 3072000:
+ if (dmic->fclk_freq != 24576000)
+ goto div_err;
+ dmic->clk_div = 0x3; /* Divider: 8 */
+ break;
+ case 3840000:
+ if (dmic->fclk_freq != 19200000)
+ goto div_err;
+ dmic->clk_div = 0x1; /* Divider: 5 */
+ break;
+ default:
+ dev_err(dmic->dev, "invalid out frequency: %dHz\n", freq);
+ return -EINVAL;
+ }
+
+ return 0;
+
+div_err:
+ dev_err(dmic->dev, "invalid out frequency %dHz for %dHz input\n", freq,
+ dmic->fclk_freq);
+ return -EINVAL;
+}
+
+static int omap_dmic_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+ if (dir == SND_SOC_CLOCK_IN)
+ return omap_dmic_select_fclk(dmic, clk_id, freq);
+ else if (dir == SND_SOC_CLOCK_OUT)
+ return omap_dmic_select_divider(dmic, freq);
+
+ dev_err(dmic->dev, "invalid clock direction (%d)\n", dir);
+ return -EINVAL;
+}
+
+static const struct snd_soc_dai_ops omap_dmic_dai_ops = {
+ .startup = omap_dmic_dai_startup,
+ .shutdown = omap_dmic_dai_shutdown,
+ .hw_params = omap_dmic_dai_hw_params,
+ .prepare = omap_dmic_dai_prepare,
+ .trigger = omap_dmic_dai_trigger,
+ .set_sysclk = omap_dmic_set_dai_sysclk,
+};
+
+static int omap_dmic_probe(struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+ pm_runtime_enable(dmic->dev);
+
+ /* Disable lines while request is ongoing */
+ pm_runtime_get_sync(dmic->dev);
+ omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, 0x00);
+ pm_runtime_put_sync(dmic->dev);
+
+ /* Configure DMIC threshold value */
+ dmic->threshold = OMAP_DMIC_THRES_MAX - 3;
+ return 0;
+}
+
+static int omap_dmic_remove(struct snd_soc_dai *dai)
+{
+ struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+ pm_runtime_disable(dmic->dev);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver omap_dmic_dai = {
+ .name = "omap-dmic",
+ .probe = omap_dmic_probe,
+ .remove = omap_dmic_remove,
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 6,
+ .rates = SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &omap_dmic_dai_ops,
+};
+
+static __devinit int asoc_dmic_probe(struct platform_device *pdev)
+{
+ struct omap_dmic *dmic;
+ struct resource *res;
+ int ret;
+
+ dmic = kzalloc(sizeof(struct omap_dmic), GFP_KERNEL);
+ if (!dmic)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, dmic);
+ dmic->dev = &pdev->dev;
+ dmic->sysclk = OMAP_DMIC_SYSCLK_SYNC_MUX_CLKS;
+
+ mutex_init(&dmic->mutex);
+
+ dmic->fclk = clk_get(dmic->dev, "dmic_fck");
+ if (IS_ERR(dmic->fclk)) {
+ dev_err(dmic->dev, "cant get dmic_fck\n");
+ ret = -ENODEV;
+ goto err_fclk;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
+ if (!res) {
+ dev_err(dmic->dev, "invalid dma memory resource\n");
+ ret = -ENODEV;
+ goto err_res;
+ }
+ omap_dmic_dai_dma_params.port_addr = res->start + OMAP_DMIC_DATA_REG;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
+ if (!res) {
+ dev_err(dmic->dev, "invalid memory resource\n");
+ ret = -ENODEV;
+ goto err_res;
+ }
+
+ dmic->io_base = ioremap(res->start, resource_size(res));
+ if (!dmic->io_base) {
+ ret = -ENOMEM;
+ goto err_res;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!res) {
+ dev_err(dmic->dev, "invalid dma resource\n");
+ ret = -ENODEV;
+ goto err_dai;
+ }
+ omap_dmic_dai_dma_params.dma_req = res->start;
+
+ ret = snd_soc_register_dai(&pdev->dev, &omap_dmic_dai);
+ if (ret)
+ goto err_dai;
+
+ return 0;
+
+err_dai:
+ iounmap(dmic->io_base);
+err_res:
+ clk_put(dmic->fclk);
+err_fclk:
+ kfree(dmic);
+ return ret;
+}
+
+static int __devexit asoc_dmic_remove(struct platform_device *pdev)
+{
+ struct omap_dmic *dmic = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_dai(&pdev->dev);
+ iounmap(dmic->io_base);
+ clk_put(dmic->fclk);
+ kfree(dmic);
+
+ return 0;
+}
+
+static struct platform_driver asoc_dmic_driver = {
+ .driver = {
+ .name = "omap-dmic",
+ .owner = THIS_MODULE,
+ },
+ .probe = asoc_dmic_probe,
+ .remove = __devexit_p(asoc_dmic_remove),
+};
+
+static int __init snd_omap_dmic_init(void)
+{
+ return platform_driver_register(&asoc_dmic_driver);
+}
+module_init(snd_omap_dmic_init);
+
+static void __exit snd_omap_dmic_exit(void)
+{
+ platform_driver_unregister(&asoc_dmic_driver);
+}
+module_exit(snd_omap_dmic_exit);
+
+MODULE_ALIAS("platform:omap-dmic");
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_DESCRIPTION("OMAP DMIC ASoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/omap/omap-dmic.h b/sound/soc/omap/omap-dmic.h
new file mode 100644
index 0000000..3f964d8
--- /dev/null
+++ b/sound/soc/omap/omap-dmic.h
@@ -0,0 +1,73 @@
+/*
+ * omap-dmic.h -- OMAP Digital Microphone Controller
+ *
+ * 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 _OMAP_DMIC_H
+#define _OMAP_DMIC_H
+
+#define OMAP_DMIC_REVISION_REG 0x00
+#define OMAP_DMIC_SYSCONFIG_REG 0x10
+#define OMAP_DMIC_IRQSTATUS_RAW_REG 0x24
+#define OMAP_DMIC_IRQSTATUS_REG 0x28
+#define OMAP_DMIC_IRQENABLE_SET_REG 0x2C
+#define OMAP_DMIC_IRQENABLE_CLR_REG 0x30
+#define OMAP_DMIC_IRQWAKE_EN_REG 0x34
+#define OMAP_DMIC_DMAENABLE_SET_REG 0x38
+#define OMAP_DMIC_DMAENABLE_CLR_REG 0x3C
+#define OMAP_DMIC_DMAWAKEEN_REG 0x40
+#define OMAP_DMIC_CTRL_REG 0x44
+#define OMAP_DMIC_DATA_REG 0x48
+#define OMAP_DMIC_FIFO_CTRL_REG 0x4C
+#define OMAP_DMIC_FIFO_DMIC1R_DATA_REG 0x50
+#define OMAP_DMIC_FIFO_DMIC1L_DATA_REG 0x54
+#define OMAP_DMIC_FIFO_DMIC2R_DATA_REG 0x58
+#define OMAP_DMIC_FIFO_DMIC2L_DATA_REG 0x5C
+#define OMAP_DMIC_FIFO_DMIC3R_DATA_REG 0x60
+#define OMAP_DMIC_FIFO_DMIC3L_DATA_REG 0x64
+
+/* IRQSTATUS_RAW, IRQSTATUS, IRQENABLE_SET, IRQENABLE_CLR bit fields */
+#define OMAP_DMIC_IRQ (1 << 0)
+#define OMAP_DMIC_IRQ_FULL (1 << 1)
+#define OMAP_DMIC_IRQ_ALMST_EMPTY (1 << 2)
+#define OMAP_DMIC_IRQ_EMPTY (1 << 3)
+#define OMAP_DMIC_IRQ_MASK 0x07
+
+/* DMIC_DMAENABLE bit fields */
+#define OMAP_DMIC_DMA_ENABLE 0x1
+
+/* DMIC_CTRL bit fields */
+#define OMAP_DMIC_UP1_ENABLE (1 << 0)
+#define OMAP_DMIC_UP2_ENABLE (1 << 1)
+#define OMAP_DMIC_UP3_ENABLE (1 << 2)
+#define OMAP_DMIC_UP_ENABLE_MASK 0x7
+#define OMAP_DMIC_FORMAT (1 << 3)
+#define OMAP_DMIC_POLAR1 (1 << 4)
+#define OMAP_DMIC_POLAR2 (1 << 5)
+#define OMAP_DMIC_POLAR3 (1 << 6)
+#define OMAP_DMIC_POLAR_MASK (0x7 << 4)
+#define OMAP_DMIC_CLK_DIV(x) (((x) & 0x7) << 7)
+#define OMAP_DMIC_CLK_DIV_MASK (0x7 << 7)
+#define OMAP_DMIC_RESET (1 << 10)
+
+#define OMAP_DMICOUTFORMAT_LJUST (0 << 3)
+#define OMAP_DMICOUTFORMAT_RJUST (1 << 3)
+
+/* DMIC_FIFO_CTRL bit fields */
+#define OMAP_DMIC_THRES_MAX 0xF
+
+enum omap_dmic_clk {
+ OMAP_DMIC_SYSCLK_PAD_CLKS, /* PAD_CLKS */
+ OMAP_DMIC_SYSCLK_SLIMBLUS_CLKS, /* SLIMBUS_CLK */
+ OMAP_DMIC_SYSCLK_SYNC_MUX_CLKS, /* DMIC_SYNC_MUX_CLK */
+};
+
+/* DMIC dividers */
+enum omap_dmic_div {
+ OMAP_DMIC_CLKDIV,
+};
+
+#endif
--
1.7.8.rc3
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v2 5/5] ASoC: sdp4430: Add support for digital microphones
2011-11-24 13:54 [PATCH v2 0/5] Support for OMAP4 Digital Microphone interface Peter Ujfalusi
` (3 preceding siblings ...)
2011-11-24 13:54 ` [PATCH v2 4/5] OMAP4: board-4430sdp: Register platform device for digimic codec Peter Ujfalusi
@ 2011-11-24 13:54 ` Peter Ujfalusi
4 siblings, 0 replies; 9+ messages in thread
From: Peter Ujfalusi @ 2011-11-24 13:54 UTC (permalink / raw)
To: Mark Brown, Liam Girdwood, Tony Lindgren
Cc: alsa-devel, linux-omap, Benoit Cousson
OMAP4 SDP/Blaze boards have digital microphones.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
sound/soc/omap/Kconfig | 2 +
sound/soc/omap/sdp4430.c | 84 ++++++++++++++++++++++++++++++++++++++++------
2 files changed, 75 insertions(+), 11 deletions(-)
diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index 052254a..fb1bf25 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -100,8 +100,10 @@ config SND_OMAP_SOC_SDP3430
config SND_OMAP_SOC_SDP4430
tristate "SoC Audio support for Texas Instruments SDP4430"
depends on TWL4030_CORE && SND_OMAP_SOC && MACH_OMAP_4430SDP
+ select SND_OMAP_SOC_DMIC
select SND_OMAP_SOC_MCPDM
select SND_SOC_TWL6040
+ select SND_SOC_DMIC
help
Say Y if you want to add support for SoC audio on Texas Instruments
SDP4430.
diff --git a/sound/soc/omap/sdp4430.c b/sound/soc/omap/sdp4430.c
index 03d9fa4..d6bf60b 100644
--- a/sound/soc/omap/sdp4430.c
+++ b/sound/soc/omap/sdp4430.c
@@ -33,6 +33,7 @@
#include <plat/hardware.h>
#include <plat/mux.h>
+#include "omap-dmic.h"
#include "omap-mcpdm.h"
#include "omap-pcm.h"
#include "../codecs/twl6040.h"
@@ -67,6 +68,31 @@ static struct snd_soc_ops sdp4430_ops = {
.hw_params = sdp4430_hw_params,
};
+static int sdp4430_dmic_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->cpu_dai;
+ int ret = 0;
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_SYSCLK_PAD_CLKS,
+ 19200000, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ printk(KERN_ERR "can't set DMIC cpu system clock\n");
+ return ret;
+ }
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 2400000, SND_SOC_CLOCK_OUT);
+ if (ret < 0) {
+ printk(KERN_ERR "can't set DMIC output clock\n");
+ return ret;
+ }
+ return 0;
+}
+
+static struct snd_soc_ops sdp4430_dmic_ops = {
+ .hw_params = sdp4430_dmic_hw_params,
+};
+
/* Headset jack */
static struct snd_soc_jack hs_jack;
@@ -148,23 +174,59 @@ static int sdp4430_twl6040_init(struct snd_soc_pcm_runtime *rtd)
return ret;
}
+static const struct snd_soc_dapm_widget sdp4430_dmic_dapm_widgets[] = {
+ SND_SOC_DAPM_MIC("Digital Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route dmic_audio_map[] = {
+ {"DMic", NULL, "Digital Mic1 Bias"},
+ {"Digital Mic1 Bias", NULL, "Digital Mic"},
+};
+
+static int sdp4430_dmic_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+ struct snd_soc_dapm_context *dapm = &codec->dapm;
+ int ret;
+
+ ret = snd_soc_dapm_new_controls(dapm, sdp4430_dmic_dapm_widgets,
+ ARRAY_SIZE(sdp4430_dmic_dapm_widgets));
+ if (ret)
+ return ret;
+
+ return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
+ ARRAY_SIZE(dmic_audio_map));
+}
+
/* Digital audio interface glue - connects codec <--> CPU */
-static struct snd_soc_dai_link sdp4430_dai = {
- .name = "TWL6040",
- .stream_name = "TWL6040",
- .cpu_dai_name = "omap-mcpdm",
- .codec_dai_name = "twl6040-legacy",
- .platform_name = "omap-pcm-audio",
- .codec_name = "twl6040-codec",
- .init = sdp4430_twl6040_init,
- .ops = &sdp4430_ops,
+static struct snd_soc_dai_link sdp4430_dai[] = {
+ {
+ .name = "TWL6040",
+ .stream_name = "TWL6040",
+ .cpu_dai_name = "omap-mcpdm",
+ .codec_dai_name = "twl6040-legacy",
+ .platform_name = "omap-pcm-audio",
+ .codec_name = "twl6040-codec",
+ .init = sdp4430_twl6040_init,
+ .ops = &sdp4430_ops,
+ },
+ {
+ .name = "DMIC",
+ .stream_name = "DMIC Capture",
+ .cpu_dai_name = "omap-dmic",
+ .codec_dai_name = "dmic-hifi",
+ .platform_name = "omap-pcm-audio",
+ .codec_name = "dmic-codec",
+ .init = sdp4430_dmic_init,
+ .ops = &sdp4430_dmic_ops,
+ },
};
/* Audio machine driver */
static struct snd_soc_card snd_soc_sdp4430 = {
.name = "SDP4430",
- .dai_link = &sdp4430_dai,
- .num_links = 1,
+ .dai_link = sdp4430_dai,
+ .num_links = ARRAY_SIZE(sdp4430_dai),
.dapm_widgets = sdp4430_twl6040_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(sdp4430_twl6040_dapm_widgets),
--
1.7.8.rc3
^ permalink raw reply related [flat|nested] 9+ messages in thread