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>
 26#include <linux/slab.h>
 27#include <linux/delay.h>
 28#include <linux/io.h>
 29#include <linux/clk.h>
 30#include <linux/regmap.h>
 31
 32#include <sound/pcm.h>
 33
 34#include <linux/mfd/davinci_voicecodec.h>
 35
 36static struct regmap_config davinci_vc_regmap = {
 37	.reg_bits = 32,
 38	.val_bits = 32,
 39};
 40
 41static int __init davinci_vc_probe(struct platform_device *pdev)
 42{
 43	struct davinci_vc *davinci_vc;
 44	struct resource *res;
 45	struct mfd_cell *cell = NULL;
 46	int ret;
 47
 48	davinci_vc = devm_kzalloc(&pdev->dev,
 49				  sizeof(struct davinci_vc), GFP_KERNEL);
 50	if (!davinci_vc) {
 51		dev_dbg(&pdev->dev,
 52			    "could not allocate memory for private data\n");
 53		return -ENOMEM;
 54	}
 55
 56	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
 57	if (IS_ERR(davinci_vc->clk)) {
 58		dev_dbg(&pdev->dev,
 59			    "could not get the clock for voice codec\n");
 60		return -ENODEV;
 61	}
 62	clk_enable(davinci_vc->clk);
 63
 64	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 65
 66	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
 67	if (IS_ERR(davinci_vc->base)) {
 68		ret = PTR_ERR(davinci_vc->base);
 69		goto fail;
 70	}
 71
 72	davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
 73						   davinci_vc->base,
 74						   &davinci_vc_regmap);
 75	if (IS_ERR(davinci_vc->regmap)) {
 76		ret = PTR_ERR(davinci_vc->regmap);
 77		goto fail;
 78	}
 79
 80	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 81	if (!res) {
 82		dev_err(&pdev->dev, "no DMA resource\n");
 83		ret = -ENXIO;
 84		goto fail;
 85	}
 86
 87	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
 88	davinci_vc->davinci_vcif.dma_tx_addr =
 89		(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
 90
 91	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 92	if (!res) {
 93		dev_err(&pdev->dev, "no DMA resource\n");
 94		ret = -ENXIO;
 95		goto fail;
 96	}
 97
 98	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
 99	davinci_vc->davinci_vcif.dma_rx_addr =
100		(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
101
102	davinci_vc->dev = &pdev->dev;
103	davinci_vc->pdev = pdev;
104
105	/* Voice codec interface client */
106	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
107	cell->name = "davinci-vcif";
108	cell->platform_data = davinci_vc;
109	cell->pdata_size = sizeof(*davinci_vc);
110
111	/* Voice codec CQ93VC client */
112	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
113	cell->name = "cq93vc-codec";
114	cell->platform_data = davinci_vc;
115	cell->pdata_size = sizeof(*davinci_vc);
116
117	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
118			      DAVINCI_VC_CELLS, NULL, 0, NULL);
119	if (ret != 0) {
120		dev_err(&pdev->dev, "fail to register client devices\n");
121		goto fail;
122	}
123
124	return 0;
125
126fail:
127	clk_disable(davinci_vc->clk);
128
129	return ret;
130}
131
132static int davinci_vc_remove(struct platform_device *pdev)
133{
134	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
135
136	mfd_remove_devices(&pdev->dev);
137
138	clk_disable(davinci_vc->clk);
139
140	return 0;
141}
142
143static struct platform_driver davinci_vc_driver = {
144	.driver	= {
145		.name = "davinci_voicecodec",
146		.owner = THIS_MODULE,
147	},
148	.remove	= davinci_vc_remove,
149};
150
151module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
152
153MODULE_AUTHOR("Miguel Aguilar");
154MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
155MODULE_LICENSE("GPL");