/arch/arm/mach-msm/qdsp6v2/snddev_ecodec.c
https://bitbucket.org/sammyz/iscream_thunderc-2.6.35-rebase · C · 387 lines · 292 code · 75 blank · 20 comment · 27 complexity · 3280911ec1e952b9b49270adefe3cc85 MD5 · raw file
- /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only 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 Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- */
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <linux/clk.h>
- #include <linux/err.h>
- #include <linux/slab.h>
- #include <linux/gpio.h>
- #include <linux/delay.h>
- #include <linux/io.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <mach/clk.h>
- #include <mach/qdsp6v2/audio_dev_ctl.h>
- #include <mach/qdsp6v2/apr_audio.h>
- #include "snddev_ecodec.h"
- #include <mach/qdsp6v2/q6afe.h>
- #define ECODEC_SAMPLE_RATE 8000
- /* Context for each external codec device */
- struct snddev_ecodec_state {
- struct snddev_ecodec_data *data;
- u32 sample_rate;
- };
- /* Global state for the driver */
- struct snddev_ecodec_drv_state {
- struct mutex dev_lock;
- int ref_cnt; /* ensure one rx device at a time */
- struct clk *ecodec_clk;
- };
- static struct snddev_ecodec_drv_state snddev_ecodec_drv;
- struct aux_pcm_state {
- unsigned int dout;
- unsigned int din;
- unsigned int syncout;
- unsigned int clkin_a;
- };
- static struct aux_pcm_state the_aux_pcm_state;
- static int aux_pcm_gpios_request(void)
- {
- int rc = 0;
- pr_debug("%s\n", __func__);
- rc = gpio_request(the_aux_pcm_state.dout, "AUX PCM DOUT");
- if (rc < 0) {
- pr_err("%s: GPIO request for AUX PCM DOUT failed\n", __func__);
- return rc;
- }
- rc = gpio_request(the_aux_pcm_state.din, "AUX PCM DIN");
- if (rc < 0) {
- pr_err("%s: GPIO request for AUX PCM DIN failed\n", __func__);
- gpio_free(the_aux_pcm_state.dout);
- return rc;
- }
- rc = gpio_request(the_aux_pcm_state.syncout, "AUX PCM SYNC OUT");
- if (rc < 0) {
- pr_err("%s: GPIO request for AUX PCM SYNC OUT failed\n",
- __func__);
- gpio_free(the_aux_pcm_state.dout);
- gpio_free(the_aux_pcm_state.din);
- return rc;
- }
- rc = gpio_request(the_aux_pcm_state.clkin_a, "AUX PCM CLKIN A");
- if (rc < 0) {
- pr_err("%s: GPIO request for AUX PCM CLKIN A failed\n",
- __func__);
- gpio_free(the_aux_pcm_state.dout);
- gpio_free(the_aux_pcm_state.din);
- gpio_free(the_aux_pcm_state.syncout);
- return rc;
- }
- return rc;
- }
- static void aux_pcm_gpios_free(void)
- {
- pr_debug("%s\n", __func__);
- gpio_free(the_aux_pcm_state.dout);
- gpio_free(the_aux_pcm_state.din);
- gpio_free(the_aux_pcm_state.syncout);
- gpio_free(the_aux_pcm_state.clkin_a);
- }
- static int get_aux_pcm_gpios(struct platform_device *pdev)
- {
- int rc = 0;
- struct resource *res;
- /* Claim all of the GPIOs. */
- res = platform_get_resource_byname(pdev, IORESOURCE_IO, "aux_pcm_dout");
- if (!res) {
- pr_err("%s: failed to get gpio AUX PCM DOUT\n", __func__);
- return -ENODEV;
- }
- the_aux_pcm_state.dout = res->start;
- res = platform_get_resource_byname(pdev, IORESOURCE_IO, "aux_pcm_din");
- if (!res) {
- pr_err("%s: failed to get gpio AUX PCM DIN\n", __func__);
- return -ENODEV;
- }
- the_aux_pcm_state.din = res->start;
- res = platform_get_resource_byname(pdev, IORESOURCE_IO,
- "aux_pcm_syncout");
- if (!res) {
- pr_err("%s: failed to get gpio AUX PCM SYNC OUT\n", __func__);
- return -ENODEV;
- }
- the_aux_pcm_state.syncout = res->start;
- res = platform_get_resource_byname(pdev, IORESOURCE_IO,
- "aux_pcm_clkin_a");
- if (!res) {
- pr_err("%s: failed to get gpio AUX PCM CLKIN A\n", __func__);
- return -ENODEV;
- }
- the_aux_pcm_state.clkin_a = res->start;
- return rc;
- }
- static int aux_pcm_probe(struct platform_device *pdev)
- {
- int rc = 0;
- rc = get_aux_pcm_gpios(pdev);
- if (rc < 0) {
- pr_err("%s: GPIO configuration failed\n", __func__);
- return -ENODEV;
- }
- return rc;
- }
- static struct platform_driver aux_pcm_driver = {
- .probe = aux_pcm_probe,
- .driver = { .name = "msm_aux_pcm"}
- };
- static int snddev_ecodec_open(struct msm_snddev_info *dev_info)
- {
- int rc;
- struct snddev_ecodec_drv_state *drv = &snddev_ecodec_drv;
- union afe_port_config afe_config;
- pr_debug("%s\n", __func__);
- mutex_lock(&drv->dev_lock);
- if (dev_info->opened) {
- pr_err("%s: ERROR: %s already opened\n", __func__,
- dev_info->name);
- mutex_unlock(&drv->dev_lock);
- return -EBUSY;
- }
- if (drv->ref_cnt != 0) {
- pr_debug("%s: opened %s\n", __func__, dev_info->name);
- drv->ref_cnt++;
- mutex_unlock(&drv->dev_lock);
- return 0;
- }
- pr_info("%s: opening %s\n", __func__, dev_info->name);
- rc = aux_pcm_gpios_request();
- if (rc < 0) {
- pr_err("%s: GPIO request failed\n", __func__);
- return rc;
- }
- clk_reset(drv->ecodec_clk, CLK_RESET_ASSERT);
- afe_config.pcm.mode = AFE_PCM_CFG_MODE_PCM;
- afe_config.pcm.sync = AFE_PCM_CFG_SYNC_INT;
- afe_config.pcm.frame = AFE_PCM_CFG_FRM_256BPF;
- afe_config.pcm.quant = AFE_PCM_CFG_QUANT_LINEAR_NOPAD;
- afe_config.pcm.slot = 0;
- afe_config.pcm.data = AFE_PCM_CFG_CDATAOE_MASTER;
- rc = afe_open(PCM_RX, &afe_config, ECODEC_SAMPLE_RATE);
- if (rc < 0) {
- pr_err("%s: afe open failed for PCM_RX\n", __func__);
- goto err_rx_afe;
- }
- rc = afe_open(PCM_TX, &afe_config, ECODEC_SAMPLE_RATE);
- if (rc < 0) {
- pr_err("%s: afe open failed for PCM_TX\n", __func__);
- goto err_tx_afe;
- }
- rc = clk_set_rate(drv->ecodec_clk, 2048000);
- if (rc < 0) {
- pr_err("%s: clk_set_rate failed\n", __func__);
- goto err_clk;
- }
- clk_enable(drv->ecodec_clk);
- clk_reset(drv->ecodec_clk, CLK_RESET_DEASSERT);
- drv->ref_cnt++;
- mutex_unlock(&drv->dev_lock);
- return 0;
- err_clk:
- afe_close(PCM_TX);
- err_tx_afe:
- afe_close(PCM_RX);
- err_rx_afe:
- aux_pcm_gpios_free();
- mutex_unlock(&drv->dev_lock);
- return -ENODEV;
- }
- int snddev_ecodec_close(struct msm_snddev_info *dev_info)
- {
- struct snddev_ecodec_drv_state *drv = &snddev_ecodec_drv;
- pr_debug("%s: closing %s\n", __func__, dev_info->name);
- mutex_lock(&drv->dev_lock);
- if (!dev_info->opened) {
- pr_err("%s: ERROR: %s is not opened\n", __func__,
- dev_info->name);
- mutex_unlock(&drv->dev_lock);
- return -EPERM;
- }
- drv->ref_cnt--;
- if (drv->ref_cnt == 0) {
- pr_info("%s: closing all devices\n", __func__);
- clk_disable(drv->ecodec_clk);
- aux_pcm_gpios_free();
- afe_close(PCM_RX);
- afe_close(PCM_TX);
- }
- mutex_unlock(&drv->dev_lock);
- return 0;
- }
- int snddev_ecodec_set_freq(struct msm_snddev_info *dev_info, u32 rate)
- {
- int rc = 0;
- if (!dev_info) {
- rc = -EINVAL;
- goto error;
- }
- return ECODEC_SAMPLE_RATE;
- error:
- return rc;
- }
- static int snddev_ecodec_probe(struct platform_device *pdev)
- {
- int rc = 0;
- struct snddev_ecodec_data *pdata;
- struct msm_snddev_info *dev_info;
- struct snddev_ecodec_state *ecodec;
- if (!pdev || !pdev->dev.platform_data) {
- printk(KERN_ALERT "Invalid caller\n");
- rc = -1;
- goto error;
- }
- pdata = pdev->dev.platform_data;
- ecodec = kzalloc(sizeof(struct snddev_ecodec_state), GFP_KERNEL);
- if (!ecodec) {
- rc = -ENOMEM;
- goto error;
- }
- dev_info = kzalloc(sizeof(struct msm_snddev_info), GFP_KERNEL);
- if (!dev_info) {
- kfree(ecodec);
- rc = -ENOMEM;
- goto error;
- }
- dev_info->name = pdata->name;
- dev_info->copp_id = pdata->copp_id;
- dev_info->private_data = (void *)ecodec;
- dev_info->dev_ops.open = snddev_ecodec_open;
- dev_info->dev_ops.close = snddev_ecodec_close;
- dev_info->dev_ops.set_freq = snddev_ecodec_set_freq;
- dev_info->dev_ops.enable_sidetone = NULL;
- dev_info->capability = pdata->capability;
- dev_info->opened = 0;
- msm_snddev_register(dev_info);
- ecodec->data = pdata;
- ecodec->sample_rate = ECODEC_SAMPLE_RATE; /* Default to 8KHz */
- error:
- return rc;
- }
- struct platform_driver snddev_ecodec_driver = {
- .probe = snddev_ecodec_probe,
- .driver = {.name = "msm_snddev_ecodec"}
- };
- int __init snddev_ecodec_init(void)
- {
- int rc = 0;
- struct snddev_ecodec_drv_state *drv = &snddev_ecodec_drv;
- mutex_init(&drv->dev_lock);
- drv->ref_cnt = 0;
- drv->ecodec_clk = clk_get(NULL, "pcm_clk");
- if (IS_ERR(drv->ecodec_clk)) {
- pr_err("%s: could not get pcm_clk\n", __func__);
- return PTR_ERR(drv->ecodec_clk);
- }
- rc = platform_driver_register(&aux_pcm_driver);
- if (IS_ERR_VALUE(rc)) {
- pr_err("%s: platform_driver_register for aux pcm failed\n",
- __func__);
- goto error_aux_pcm_platform_driver;
- }
- rc = platform_driver_register(&snddev_ecodec_driver);
- if (IS_ERR_VALUE(rc)) {
- pr_err("%s: platform_driver_register for ecodec failed\n",
- __func__);
- goto error_ecodec_platform_driver;
- }
- return 0;
- error_ecodec_platform_driver:
- platform_driver_unregister(&aux_pcm_driver);
- error_aux_pcm_platform_driver:
- clk_put(drv->ecodec_clk);
- pr_err("%s: encounter error\n", __func__);
- return -ENODEV;
- }
- device_initcall(snddev_ecodec_init);
- MODULE_DESCRIPTION("ECodec Sound Device driver");
- MODULE_VERSION("1.0");
- MODULE_LICENSE("GPL v2");