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Diffstat (limited to 'sound/soc/omap/omap-dmic.c')
-rw-r--r--sound/soc/omap/omap-dmic.c541
1 files changed, 0 insertions, 541 deletions
diff --git a/sound/soc/omap/omap-dmic.c b/sound/soc/omap/omap-dmic.c
deleted file mode 100644
index cba9645b6487..000000000000
--- a/sound/soc/omap/omap-dmic.c
+++ /dev/null
@@ -1,541 +0,0 @@
-/*
- * 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 <linux/of_device.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/initval.h>
-#include <sound/soc.h>
-#include <sound/dmaengine_pcm.h>
-
-#include "omap-dmic.h"
-#include "sdma-pcm.h"
-
-struct omap_dmic {
- struct device *dev;
- void __iomem *io_base;
- struct clk *fclk;
- struct pm_qos_request pm_qos_req;
- int latency;
- int fclk_freq;
- int out_freq;
- int clk_div;
- int sysclk;
- int threshold;
- u32 ch_enabled;
- bool active;
- struct mutex mutex;
-
- struct snd_dmaengine_dai_dma_data dma_data;
-};
-
-static inline void omap_dmic_write(struct omap_dmic *dmic, u16 reg, u32 val)
-{
- writel_relaxed(val, dmic->io_base + reg);
-}
-
-static inline int omap_dmic_read(struct omap_dmic *dmic, u16 reg)
-{
- return readl_relaxed(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)
- dmic->active = 1;
- 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);
-
- pm_qos_remove_request(&dmic->pm_qos_req);
-
- if (!dai->active)
- dmic->active = 0;
-
- mutex_unlock(&dmic->mutex);
-}
-
-static int omap_dmic_select_divider(struct omap_dmic *dmic, int sample_rate)
-{
- int divider = -EINVAL;
-
- /*
- * 192KHz rate is only supported with 19.2MHz/3.84MHz clock
- * configuration.
- */
- if (sample_rate == 192000) {
- if (dmic->fclk_freq == 19200000 && dmic->out_freq == 3840000)
- divider = 0x6; /* Divider: 5 (192KHz sampling rate) */
- else
- dev_err(dmic->dev,
- "invalid clock configuration for 192KHz\n");
-
- return divider;
- }
-
- switch (dmic->out_freq) {
- case 1536000:
- if (dmic->fclk_freq != 24576000)
- goto div_err;
- divider = 0x4; /* Divider: 16 */
- break;
- case 2400000:
- switch (dmic->fclk_freq) {
- case 12000000:
- divider = 0x5; /* Divider: 5 */
- break;
- case 19200000:
- divider = 0x0; /* Divider: 8 */
- break;
- case 24000000:
- divider = 0x2; /* Divider: 10 */
- break;
- default:
- goto div_err;
- }
- break;
- case 3072000:
- if (dmic->fclk_freq != 24576000)
- goto div_err;
- divider = 0x3; /* Divider: 8 */
- break;
- case 3840000:
- if (dmic->fclk_freq != 19200000)
- goto div_err;
- divider = 0x1; /* Divider: 5 (96KHz sampling rate) */
- break;
- default:
- dev_err(dmic->dev, "invalid out frequency: %dHz\n",
- dmic->out_freq);
- break;
- }
-
- return divider;
-
-div_err:
- dev_err(dmic->dev, "invalid out frequency %dHz for %dHz input\n",
- dmic->out_freq, dmic->fclk_freq);
- return -EINVAL;
-}
-
-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);
- struct snd_dmaengine_dai_dma_data *dma_data;
- int channels;
-
- dmic->clk_div = omap_dmic_select_divider(dmic, params_rate(params));
- if (dmic->clk_div < 0) {
- dev_err(dmic->dev, "no valid divider for %dHz from %dHz\n",
- dmic->out_freq, dmic->fclk_freq);
- return -EINVAL;
- }
-
- dmic->ch_enabled = 0;
- channels = params_channels(params);
- switch (channels) {
- case 6:
- dmic->ch_enabled |= OMAP_DMIC_UP3_ENABLE;
- /* fall through */
- case 4:
- dmic->ch_enabled |= OMAP_DMIC_UP2_ENABLE;
- /* fall through */
- 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 */
- dma_data = snd_soc_dai_get_dma_data(dai, substream);
- dma_data->maxburst = dmic->threshold * channels;
- dmic->latency = (OMAP_DMIC_THRES_MAX - dmic->threshold) * USEC_PER_SEC /
- params_rate(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;
-
- if (pm_qos_request_active(&dmic->pm_qos_req))
- pm_qos_update_request(&dmic->pm_qos_req, dmic->latency);
-
- /* 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, *mux;
- 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);
- dmic->fclk_freq = 0;
- return -EINVAL;
- }
-
- if (dmic->sysclk == clk_id) {
- dmic->fclk_freq = freq;
- return 0;
- }
-
- /* re-parent not allowed if a stream is ongoing */
- if (dmic->active && 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, "fclk clk_id (%d) not supported\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;
- }
-
- mux = clk_get_parent(dmic->fclk);
- if (IS_ERR(mux)) {
- dev_err(dmic->dev, "can't get fck mux parent\n");
- clk_put(parent_clk);
- return -ENODEV;
- }
-
- mutex_lock(&dmic->mutex);
- if (dmic->active) {
- /* disable clock while reparenting */
- pm_runtime_put_sync(dmic->dev);
- ret = clk_set_parent(mux, parent_clk);
- pm_runtime_get_sync(dmic->dev);
- } else {
- ret = clk_set_parent(mux, parent_clk);
- }
- mutex_unlock(&dmic->mutex);
-
- 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(mux);
- clk_put(parent_clk);
-
- return ret;
-}
-
-static int omap_dmic_select_outclk(struct omap_dmic *dmic, int clk_id,
- unsigned int freq)
-{
- int ret = 0;
-
- if (clk_id != OMAP_DMIC_ABE_DMIC_CLK) {
- dev_err(dmic->dev, "output clk_id (%d) not supported\n",
- clk_id);
- return -EINVAL;
- }
-
- switch (freq) {
- case 1536000:
- case 2400000:
- case 3072000:
- case 3840000:
- dmic->out_freq = freq;
- break;
- default:
- dev_err(dmic->dev, "invalid out frequency: %dHz\n", freq);
- dmic->out_freq = 0;
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-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_outclk(dmic, clk_id, 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;
-
- snd_soc_dai_init_dma_data(dai, NULL, &dmic->dma_data);
-
- 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,
- .sig_bits = 24,
- },
- .ops = &omap_dmic_dai_ops,
-};
-
-static const struct snd_soc_component_driver omap_dmic_component = {
- .name = "omap-dmic",
-};
-
-static int asoc_dmic_probe(struct platform_device *pdev)
-{
- struct omap_dmic *dmic;
- struct resource *res;
- int ret;
-
- dmic = devm_kzalloc(&pdev->dev, 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 = devm_clk_get(dmic->dev, "fck");
- if (IS_ERR(dmic->fclk)) {
- dev_err(dmic->dev, "cant get fck\n");
- return -ENODEV;
- }
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
- if (!res) {
- dev_err(dmic->dev, "invalid dma memory resource\n");
- return -ENODEV;
- }
- dmic->dma_data.addr = res->start + OMAP_DMIC_DATA_REG;
-
- dmic->dma_data.filter_data = "up_link";
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
- dmic->io_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dmic->io_base))
- return PTR_ERR(dmic->io_base);
-
-
- ret = devm_snd_soc_register_component(&pdev->dev,
- &omap_dmic_component,
- &omap_dmic_dai, 1);
- if (ret)
- return ret;
-
- ret = sdma_pcm_platform_register(&pdev->dev, NULL, "up_link");
- if (ret)
- return ret;
-
- return 0;
-}
-
-static const struct of_device_id omap_dmic_of_match[] = {
- { .compatible = "ti,omap4-dmic", },
- { }
-};
-MODULE_DEVICE_TABLE(of, omap_dmic_of_match);
-
-static struct platform_driver asoc_dmic_driver = {
- .driver = {
- .name = "omap-dmic",
- .of_match_table = omap_dmic_of_match,
- },
- .probe = asoc_dmic_probe,
-};
-
-module_platform_driver(asoc_dmic_driver);
-
-MODULE_ALIAS("platform:omap-dmic");
-MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
-MODULE_DESCRIPTION("OMAP DMIC ASoC Interface");
-MODULE_LICENSE("GPL");
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