[deliverable/linux.git] / drivers / mfd / davinci_voicecodec.c

/*
 * DaVinci Voice Codec Core Interface for TI platforms
 *
 * Copyright (C) 2010 Texas Instruments, Inc
 *
 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/clk.h>

#include <sound/pcm.h>

#include <linux/mfd/davinci_voicecodec.h>

u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
{
	return __raw_readl(davinci_vc->base + reg);
}

void davinci_vc_write(struct davinci_vc *davinci_vc,
					   int reg, u32 val)
{
	__raw_writel(val, davinci_vc->base + reg);
}

static int __init davinci_vc_probe(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc;
	struct resource *res;
	struct mfd_cell *cell = NULL;
	int ret;

	davinci_vc = devm_kzalloc(&pdev->dev,
				  sizeof(struct davinci_vc), GFP_KERNEL);
	if (!davinci_vc) {
		dev_dbg(&pdev->dev,
			    "could not allocate memory for private data\n");
		return -ENOMEM;
	}

	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(davinci_vc->clk)) {
		dev_dbg(&pdev->dev,
			    "could not get the clock for voice codec\n");
		return -ENODEV;
	}
	clk_enable(davinci_vc->clk);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(davinci_vc->base)) {
		ret = PTR_ERR(davinci_vc->base);
		goto fail;
	}

	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	if (!res) {
		dev_err(&pdev->dev, "no DMA resource\n");
		ret = -ENXIO;
		goto fail;
	}

	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
	davinci_vc->davinci_vcif.dma_tx_addr =
		(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);

	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	if (!res) {
		dev_err(&pdev->dev, "no DMA resource\n");
		ret = -ENXIO;
		goto fail;
	}

	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
	davinci_vc->davinci_vcif.dma_rx_addr =
		(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);

	davinci_vc->dev = &pdev->dev;
	davinci_vc->pdev = pdev;

	/* Voice codec interface client */
	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
	cell->name = "davinci-vcif";
	cell->platform_data = davinci_vc;
	cell->pdata_size = sizeof(*davinci_vc);

	/* Voice codec CQ93VC client */
	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
	cell->name = "cq93vc-codec";
	cell->platform_data = davinci_vc;
	cell->pdata_size = sizeof(*davinci_vc);

	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
			      DAVINCI_VC_CELLS, NULL, 0, NULL);
	if (ret != 0) {
		dev_err(&pdev->dev, "fail to register client devices\n");
		goto fail;
	}

	return 0;

fail:
	clk_disable(davinci_vc->clk);

	return ret;
}

static int davinci_vc_remove(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);

	mfd_remove_devices(&pdev->dev);

	clk_disable(davinci_vc->clk);

	return 0;
}

static struct platform_driver davinci_vc_driver = {
	.driver	= {
		.name = "davinci_voicecodec",
		.owner = THIS_MODULE,
	},
	.remove	= davinci_vc_remove,
};

module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);

MODULE_AUTHOR("Miguel Aguilar");
MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
ca26308c MA	1	/*
	2	* DaVinci Voice Codec Core Interface for TI platforms
	3	*
	4	* Copyright (C) 2010 Texas Instruments, Inc
	5	*
	6	* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
	23	#include <linux/init.h>
	24	#include <linux/module.h>
	25	#include <linux/device.h>
8c0d8fa2	26	#include <linux/slab.h>
ca26308c MA	27	#include <linux/delay.h>
	28	#include <linux/io.h>
	29	#include <linux/clk.h>
	30
	31	#include <sound/pcm.h>
	32
	33	#include <linux/mfd/davinci_voicecodec.h>
	34
	35	u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
	36	{
	37	return __raw_readl(davinci_vc->base + reg);
	38	}
	39
	40	void davinci_vc_write(struct davinci_vc *davinci_vc,
	41	int reg, u32 val)
	42	{
	43	__raw_writel(val, davinci_vc->base + reg);
	44	}
	45
	46	static int __init davinci_vc_probe(struct platform_device *pdev)
	47	{
	48	struct davinci_vc *davinci_vc;
c8eaed45	49	struct resource *res;
ca26308c MA	50	struct mfd_cell *cell = NULL;
	51	int ret;
	52
099053a4 LJ	53	davinci_vc = devm_kzalloc(&pdev->dev,
099053a4 LJ	54	sizeof(struct davinci_vc), GFP_KERNEL);
ca26308c MA	55	if (!davinci_vc) {
	56	dev_dbg(&pdev->dev,
	57	"could not allocate memory for private data\n");
	58	return -ENOMEM;
	59	}
	60
c8eaed45	61	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
ca26308c MA	62	if (IS_ERR(davinci_vc->clk)) {
	63	dev_dbg(&pdev->dev,
	64	"could not get the clock for voice codec\n");
099053a4	65	return -ENODEV;
ca26308c MA	66	}
	67	clk_enable(davinci_vc->clk);
	68
	69	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ca26308c	70
c8eaed45 SK	71	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
	72	if (IS_ERR(davinci_vc->base)) {
	73	ret = PTR_ERR(davinci_vc->base);
	74	goto fail;
ca26308c MA	75	}
	76
	77	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	78	if (!res) {
	79	dev_err(&pdev->dev, "no DMA resource\n");
e2bde787	80	ret = -ENXIO;
c8eaed45	81	goto fail;
ca26308c MA	82	}
	83
	84	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
	85	davinci_vc->davinci_vcif.dma_tx_addr =
	86	(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
	87
	88	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	89	if (!res) {
	90	dev_err(&pdev->dev, "no DMA resource\n");
e2bde787	91	ret = -ENXIO;
c8eaed45	92	goto fail;
ca26308c MA	93	}
	94
	95	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
	96	davinci_vc->davinci_vcif.dma_rx_addr =
	97	(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
	98
	99	davinci_vc->dev = &pdev->dev;
	100	davinci_vc->pdev = pdev;
	101
	102	/* Voice codec interface client */
	103	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
73ee6524	104	cell->name = "davinci-vcif";
cb5811cf SO	105	cell->platform_data = davinci_vc;
cb5811cf SO	106	cell->pdata_size = sizeof(*davinci_vc);
ca26308c MA	107
	108	/* Voice codec CQ93VC client */
	109	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
73ee6524	110	cell->name = "cq93vc-codec";
cb5811cf SO	111	cell->platform_data = davinci_vc;
cb5811cf SO	112	cell->pdata_size = sizeof(*davinci_vc);
ca26308c MA	113
ca26308c MA	114	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
0848c94f	115	DAVINCI_VC_CELLS, NULL, 0, NULL);
ca26308c MA	116	if (ret != 0) {
ca26308c MA	117	dev_err(&pdev->dev, "fail to register client devices\n");
c8eaed45	118	goto fail;
ca26308c MA	119	}
	120
	121	return 0;
	122
c8eaed45	123	fail:
ca26308c	124	clk_disable(davinci_vc->clk);
ca26308c MA	125
	126	return ret;
	127	}
	128
4740f73f	129	static int davinci_vc_remove(struct platform_device *pdev)
ca26308c MA	130	{
	131	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
	132
	133	mfd_remove_devices(&pdev->dev);
	134
ca26308c	135	clk_disable(davinci_vc->clk);
ca26308c	136
ca26308c MA	137	return 0;
	138	}
	139
	140	static struct platform_driver davinci_vc_driver = {
	141	.driver = {
	142	.name = "davinci_voicecodec",
	143	.owner = THIS_MODULE,
	144	},
84449216	145	.remove = davinci_vc_remove,
ca26308c MA	146	};
ca26308c MA	147
3de764d4	148	module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
ca26308c MA	149
	150	MODULE_AUTHOR("Miguel Aguilar");
	151	MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
	152	MODULE_LICENSE("GPL");