arch/arm/mach-msm/qdsp5v2/aux_pcm.c - kernel/msm - Gitiles

 /* Copyright (c) 2009-2011, 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.
  *
  */
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <mach/qdsp5v2/aux_pcm.h>
 #include <linux/delay.h>
 #include <mach/debug_mm.h>

 /*----------------------------------------------------------------------------
  * Preprocessor Definitions and Constants
  * -------------------------------------------------------------------------*/

 /* define offset of registers here, may put them into platform data */
 #define AUX_CODEC_CTL_OFFSET 0x00
 #define PCM_PATH_CTL_OFFSET 0x04
 #define AUX_CODEC_CTL_OUT_OFFSET 0x08

 /* define some bit values in PCM_PATH_CTL register */
 #define PCM_PATH_CTL__ADSP_CTL_EN_BMSK 0x8

 /* mask and shift */
 #define AUX_CODEC_CTL_ADSP_CODEC_CTL_EN_BMSK 0x800
 #define AUX_CODEC_CTL_PCM_SYNC_LONG_BMSK 0x400
 #define AUX_CODEC_CTL_PCM_SYNC_SHORT_BMSK 0x200
 #define AUX_CODEC_CTL_I2S_SAMPLE_CLK_SRC_BMSK 0x80
 #define AUX_CODEC_CTL_I2S_SAMPLE_CLK_MODE_BMSK 0x40
 #define AUX_CODEC_CTL_I2S_RX_MODE_BMSK 0x20
 #define AUX_CODEC_CTL_I2S_CLK_MODE_BMSK 0x10
 #define AUX_CODEC_CTL_AUX_PCM_MODE_BMSK 0x0b
 #define AUX_CODEC_CTL_AUX_CODEC_MODE_BMSK 0x02

 /* AUX PCM MODE */
 #define MASTER_PRIM_PCM_SHORT 0
 #define MASTER_AUX_PCM_LONG 1
 #define SLAVE_PRIM_PCM_SHORT 2

 struct aux_pcm_state {
 	void __iomem *aux_pcm_base;  /* configure aux pcm through Scorpion */
 	int     dout;
 	int     din;
 	int     syncout;
 	int     clkin_a;
 };

 static struct aux_pcm_state the_aux_pcm_state;

 static void __iomem *get_base_addr(struct aux_pcm_state *aux_pcm)
 {
 	return aux_pcm->aux_pcm_base;
 }

 /* Set who control aux pcm : adsp or MSM */
 void aux_codec_adsp_codec_ctl_en(bool msm_adsp_en)
 {
 	void __iomem *baddr = get_base_addr(&the_aux_pcm_state);
 	uint32_t val;

 	if (!IS_ERR(baddr)) {
 		val = readl(baddr + AUX_CODEC_CTL_OFFSET);
 		if (msm_adsp_en) { /* adsp */
 			writel(
 			((val & ~AUX_CODEC_CTL_ADSP_CODEC_CTL_EN_BMSK) |
 			AUX_CODEC_CTL__ADSP_CODEC_CTL_EN__ADSP_V),
 			baddr + AUX_CODEC_CTL_OFFSET);
 		} else { /* MSM */
 			writel(
 			((val & ~AUX_CODEC_CTL_ADSP_CODEC_CTL_EN_BMSK) |
 			AUX_CODEC_CTL__ADSP_CODEC_CTL_EN__MSM_V),
 			baddr + AUX_CODEC_CTL_OFFSET);
 		}
 	}
 	mb();
 }

 /* Set who control aux pcm path: adsp or MSM */
 void aux_codec_pcm_path_ctl_en(bool msm_adsp_en)
 {
 	void __iomem *baddr = get_base_addr(&the_aux_pcm_state);
 	uint32_t val;

 	 if (!IS_ERR(baddr)) {
 		val = readl(baddr + PCM_PATH_CTL_OFFSET);
 		if (msm_adsp_en) { /* adsp */
 			writel(
 			((val & ~PCM_PATH_CTL__ADSP_CTL_EN_BMSK) |
 			PCM_PATH_CTL__ADSP_CTL_EN__ADSP_V),
 			baddr + PCM_PATH_CTL_OFFSET);
 		} else { /* MSM */
 			writel(
 			((val & ~PCM_PATH_CTL__ADSP_CTL_EN_BMSK) |
 			PCM_PATH_CTL__ADSP_CTL_EN__MSM_V),
 			baddr + PCM_PATH_CTL_OFFSET);
 		}
 	}
 	mb();
 	return;
 }
 EXPORT_SYMBOL(aux_codec_pcm_path_ctl_en);

 int aux_pcm_gpios_request(void)
 {
 	int rc = 0;

 	MM_DBG("aux_pcm_gpios_request\n");
 	rc = gpio_request(the_aux_pcm_state.dout, "AUX PCM DOUT");
 	if (rc) {
 		MM_ERR("GPIO request for AUX PCM DOUT failed\n");
 		return rc;
 	}

 	rc = gpio_request(the_aux_pcm_state.din, "AUX PCM DIN");
 	if (rc) {
 		MM_ERR("GPIO request for AUX PCM DIN failed\n");
 		gpio_free(the_aux_pcm_state.dout);
 		return rc;
 	}

 	rc = gpio_request(the_aux_pcm_state.syncout, "AUX PCM SYNC OUT");
 	if (rc) {
 		MM_ERR("GPIO request for AUX PCM SYNC OUT failed\n");
 		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) {
 		MM_ERR("GPIO request for AUX PCM CLKIN A failed\n");
 		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;
 }
 EXPORT_SYMBOL(aux_pcm_gpios_request);


 void aux_pcm_gpios_free(void)
 {
 	MM_DBG(" aux_pcm_gpios_free \n");

 	/*
 	 * Feed silence frames before close to prevent buzzing sound in BT at
 	 * call end. This fix is applicable only to Marimba BT.
 	 */
 	gpio_tlmm_config(GPIO_CFG(the_aux_pcm_state.dout, 0, GPIO_CFG_OUTPUT,
 		GPIO_CFG_NO_PULL, GPIO_CFG_2MA), GPIO_CFG_ENABLE);
 	gpio_set_value(the_aux_pcm_state.dout, 0);
 	msleep(20);
 	gpio_tlmm_config(GPIO_CFG(the_aux_pcm_state.dout, 1, GPIO_CFG_OUTPUT,
 		GPIO_CFG_NO_PULL, GPIO_CFG_2MA), GPIO_CFG_ENABLE);

 	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);
 }
 EXPORT_SYMBOL(aux_pcm_gpios_free);


 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) {
 		MM_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) {
 		MM_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) {
 		MM_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) {
 		MM_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;
 	struct resource *mem_src;

 	MM_DBG("aux_pcm_probe \n");
 	mem_src = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 						"aux_codec_reg_addr");
 	if (!mem_src) {
 		rc = -ENODEV;
 		goto done;
 	}

 	the_aux_pcm_state.aux_pcm_base = ioremap(mem_src->start,
 		(mem_src->end - mem_src->start) + 1);
 	if (!the_aux_pcm_state.aux_pcm_base) {
 		rc = -ENOMEM;
 		goto done;
 	}
 	rc = get_aux_pcm_gpios(pdev);
 	if (rc) {
 		MM_ERR("GPIO configuration failed\n");
 		rc = -ENODEV;
 	}

 done:	return rc;

 }

 static int aux_pcm_remove(struct platform_device *pdev)
 {
 	iounmap(the_aux_pcm_state.aux_pcm_base);
 	return 0;
 }

 static struct platform_driver aux_pcm_driver = {
 	.probe = aux_pcm_probe,
 	.remove = aux_pcm_remove,
 	.driver = {
 		.name = "msm_aux_pcm",
 		.owner = THIS_MODULE,
 	},
 };

 static int __init aux_pcm_init(void)
 {

 	return platform_driver_register(&aux_pcm_driver);
 }

 static void __exit aux_pcm_exit(void)
 {
 	platform_driver_unregister(&aux_pcm_driver);
 }

 module_init(aux_pcm_init);
 module_exit(aux_pcm_exit);

 MODULE_DESCRIPTION("MSM AUX PCM driver");
 MODULE_LICENSE("GPL v2");
	/* Copyright (c) 2009-2011, 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.
	*
	*/
	#include <linux/module.h>
	#include <linux/mutex.h>
	#include <linux/platform_device.h>
	#include <linux/io.h>
	#include <linux/err.h>
	#include <linux/gpio.h>
	#include <mach/qdsp5v2/aux_pcm.h>
	#include <linux/delay.h>
	#include <mach/debug_mm.h>

	/*----------------------------------------------------------------------------
	* Preprocessor Definitions and Constants
	* -------------------------------------------------------------------------*/

	/* define offset of registers here, may put them into platform data */
	#define AUX_CODEC_CTL_OFFSET 0x00
	#define PCM_PATH_CTL_OFFSET 0x04
	#define AUX_CODEC_CTL_OUT_OFFSET 0x08

	/* define some bit values in PCM_PATH_CTL register */
	#define PCM_PATH_CTL__ADSP_CTL_EN_BMSK 0x8

	/* mask and shift */
	#define AUX_CODEC_CTL_ADSP_CODEC_CTL_EN_BMSK 0x800
	#define AUX_CODEC_CTL_PCM_SYNC_LONG_BMSK 0x400
	#define AUX_CODEC_CTL_PCM_SYNC_SHORT_BMSK 0x200
	#define AUX_CODEC_CTL_I2S_SAMPLE_CLK_SRC_BMSK 0x80
	#define AUX_CODEC_CTL_I2S_SAMPLE_CLK_MODE_BMSK 0x40
	#define AUX_CODEC_CTL_I2S_RX_MODE_BMSK 0x20
	#define AUX_CODEC_CTL_I2S_CLK_MODE_BMSK 0x10
	#define AUX_CODEC_CTL_AUX_PCM_MODE_BMSK 0x0b
	#define AUX_CODEC_CTL_AUX_CODEC_MODE_BMSK 0x02

	/* AUX PCM MODE */
	#define MASTER_PRIM_PCM_SHORT 0
	#define MASTER_AUX_PCM_LONG 1
	#define SLAVE_PRIM_PCM_SHORT 2

	struct aux_pcm_state {
	void __iomem aux_pcm_base; / configure aux pcm through Scorpion */
	int dout;
	int din;
	int syncout;
	int clkin_a;
	};

	static struct aux_pcm_state the_aux_pcm_state;

	static void __iomem get_base_addr(struct aux_pcm_state aux_pcm)
	{
	return aux_pcm->aux_pcm_base;
	}

	/* Set who control aux pcm : adsp or MSM */
	void aux_codec_adsp_codec_ctl_en(bool msm_adsp_en)
	{
	void __iomem *baddr = get_base_addr(&the_aux_pcm_state);
	uint32_t val;

	if (!IS_ERR(baddr)) {
	val = readl(baddr + AUX_CODEC_CTL_OFFSET);
	if (msm_adsp_en) { /* adsp */
	writel(
	((val & ~AUX_CODEC_CTL_ADSP_CODEC_CTL_EN_BMSK) \|
	AUX_CODEC_CTL__ADSP_CODEC_CTL_EN__ADSP_V),
	baddr + AUX_CODEC_CTL_OFFSET);
	} else { /* MSM */
	writel(
	((val & ~AUX_CODEC_CTL_ADSP_CODEC_CTL_EN_BMSK) \|
	AUX_CODEC_CTL__ADSP_CODEC_CTL_EN__MSM_V),
	baddr + AUX_CODEC_CTL_OFFSET);
	}
	}
	mb();
	}

	/* Set who control aux pcm path: adsp or MSM */
	void aux_codec_pcm_path_ctl_en(bool msm_adsp_en)
	{
	void __iomem *baddr = get_base_addr(&the_aux_pcm_state);
	uint32_t val;

	if (!IS_ERR(baddr)) {
	val = readl(baddr + PCM_PATH_CTL_OFFSET);
	if (msm_adsp_en) { /* adsp */
	writel(
	((val & ~PCM_PATH_CTL__ADSP_CTL_EN_BMSK) \|
	PCM_PATH_CTL__ADSP_CTL_EN__ADSP_V),
	baddr + PCM_PATH_CTL_OFFSET);
	} else { /* MSM */
	writel(
	((val & ~PCM_PATH_CTL__ADSP_CTL_EN_BMSK) \|
	PCM_PATH_CTL__ADSP_CTL_EN__MSM_V),
	baddr + PCM_PATH_CTL_OFFSET);
	}
	}
	mb();
	return;
	}
	EXPORT_SYMBOL(aux_codec_pcm_path_ctl_en);

	int aux_pcm_gpios_request(void)
	{
	int rc = 0;

	MM_DBG("aux_pcm_gpios_request\n");
	rc = gpio_request(the_aux_pcm_state.dout, "AUX PCM DOUT");
	if (rc) {
	MM_ERR("GPIO request for AUX PCM DOUT failed\n");
	return rc;
	}

	rc = gpio_request(the_aux_pcm_state.din, "AUX PCM DIN");
	if (rc) {
	MM_ERR("GPIO request for AUX PCM DIN failed\n");
	gpio_free(the_aux_pcm_state.dout);
	return rc;
	}

	rc = gpio_request(the_aux_pcm_state.syncout, "AUX PCM SYNC OUT");
	if (rc) {
	MM_ERR("GPIO request for AUX PCM SYNC OUT failed\n");
	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) {
	MM_ERR("GPIO request for AUX PCM CLKIN A failed\n");
	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;
	}
	EXPORT_SYMBOL(aux_pcm_gpios_request);


	void aux_pcm_gpios_free(void)
	{
	MM_DBG(" aux_pcm_gpios_free \n");

	/*
	* Feed silence frames before close to prevent buzzing sound in BT at
	* call end. This fix is applicable only to Marimba BT.
	*/
	gpio_tlmm_config(GPIO_CFG(the_aux_pcm_state.dout, 0, GPIO_CFG_OUTPUT,
	GPIO_CFG_NO_PULL, GPIO_CFG_2MA), GPIO_CFG_ENABLE);
	gpio_set_value(the_aux_pcm_state.dout, 0);
	msleep(20);
	gpio_tlmm_config(GPIO_CFG(the_aux_pcm_state.dout, 1, GPIO_CFG_OUTPUT,
	GPIO_CFG_NO_PULL, GPIO_CFG_2MA), GPIO_CFG_ENABLE);

	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);
	}
	EXPORT_SYMBOL(aux_pcm_gpios_free);


	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) {
	MM_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) {
	MM_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) {
	MM_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) {
	MM_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;
	struct resource *mem_src;

	MM_DBG("aux_pcm_probe \n");
	mem_src = platform_get_resource_byname(pdev, IORESOURCE_MEM,
	"aux_codec_reg_addr");
	if (!mem_src) {
	rc = -ENODEV;
	goto done;
	}

	the_aux_pcm_state.aux_pcm_base = ioremap(mem_src->start,
	(mem_src->end - mem_src->start) + 1);
	if (!the_aux_pcm_state.aux_pcm_base) {
	rc = -ENOMEM;
	goto done;
	}
	rc = get_aux_pcm_gpios(pdev);
	if (rc) {
	MM_ERR("GPIO configuration failed\n");
	rc = -ENODEV;
	}

	done: return rc;

	}

	static int aux_pcm_remove(struct platform_device *pdev)
	{
	iounmap(the_aux_pcm_state.aux_pcm_base);
	return 0;
	}

	static struct platform_driver aux_pcm_driver = {
	.probe = aux_pcm_probe,
	.remove = aux_pcm_remove,
	.driver = {
	.name = "msm_aux_pcm",
	.owner = THIS_MODULE,
	},
	};

	static int __init aux_pcm_init(void)
	{

	return platform_driver_register(&aux_pcm_driver);
	}

	static void __exit aux_pcm_exit(void)
	{
	platform_driver_unregister(&aux_pcm_driver);
	}

	module_init(aux_pcm_init);
	module_exit(aux_pcm_exit);

	MODULE_DESCRIPTION("MSM AUX PCM driver");
	MODULE_LICENSE("GPL v2");