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Miguel Aguilarca263082010-03-11 09:32:21 -06001/*
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>
Tejun Heo8c0d8fa2010-03-30 02:52:40 +090026#include <linux/slab.h>
Miguel Aguilarca263082010-03-11 09:32:21 -060027#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
35u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
36{
37 return __raw_readl(davinci_vc->base + reg);
38}
39
40void davinci_vc_write(struct davinci_vc *davinci_vc,
41 int reg, u32 val)
42{
43 __raw_writel(val, davinci_vc->base + reg);
44}
45
46static int __init davinci_vc_probe(struct platform_device *pdev)
47{
48 struct davinci_vc *davinci_vc;
Sachin Kamatc8eaed42013-06-18 15:35:40 +053049 struct resource *res;
Miguel Aguilarca263082010-03-11 09:32:21 -060050 struct mfd_cell *cell = NULL;
51 int ret;
52
Lee Jones099053a2013-05-23 16:25:11 +010053 davinci_vc = devm_kzalloc(&pdev->dev,
54 sizeof(struct davinci_vc), GFP_KERNEL);
Miguel Aguilarca263082010-03-11 09:32:21 -060055 if (!davinci_vc) {
56 dev_dbg(&pdev->dev,
57 "could not allocate memory for private data\n");
58 return -ENOMEM;
59 }
60
Sachin Kamatc8eaed42013-06-18 15:35:40 +053061 davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
Miguel Aguilarca263082010-03-11 09:32:21 -060062 if (IS_ERR(davinci_vc->clk)) {
63 dev_dbg(&pdev->dev,
64 "could not get the clock for voice codec\n");
Lee Jones099053a2013-05-23 16:25:11 +010065 return -ENODEV;
Miguel Aguilarca263082010-03-11 09:32:21 -060066 }
67 clk_enable(davinci_vc->clk);
68
69 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Miguel Aguilarca263082010-03-11 09:32:21 -060070
Sachin Kamatc8eaed42013-06-18 15:35:40 +053071 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;
Miguel Aguilarca263082010-03-11 09:32:21 -060075 }
76
77 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
78 if (!res) {
79 dev_err(&pdev->dev, "no DMA resource\n");
Julia Lawalle2bde7872010-06-01 16:34:38 +020080 ret = -ENXIO;
Sachin Kamatc8eaed42013-06-18 15:35:40 +053081 goto fail;
Miguel Aguilarca263082010-03-11 09:32:21 -060082 }
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");
Julia Lawalle2bde7872010-06-01 16:34:38 +020091 ret = -ENXIO;
Sachin Kamatc8eaed42013-06-18 15:35:40 +053092 goto fail;
Miguel Aguilarca263082010-03-11 09:32:21 -060093 }
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];
Manjunathappa, Prakash73ee6522011-01-27 18:58:36 +0530104 cell->name = "davinci-vcif";
Samuel Ortizcb5811c2011-04-06 16:39:45 +0200105 cell->platform_data = davinci_vc;
106 cell->pdata_size = sizeof(*davinci_vc);
Miguel Aguilarca263082010-03-11 09:32:21 -0600107
108 /* Voice codec CQ93VC client */
109 cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
Manjunathappa, Prakash73ee6522011-01-27 18:58:36 +0530110 cell->name = "cq93vc-codec";
Samuel Ortizcb5811c2011-04-06 16:39:45 +0200111 cell->platform_data = davinci_vc;
112 cell->pdata_size = sizeof(*davinci_vc);
Miguel Aguilarca263082010-03-11 09:32:21 -0600113
114 ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
Mark Brown0848c942012-09-11 15:16:36 +0800115 DAVINCI_VC_CELLS, NULL, 0, NULL);
Miguel Aguilarca263082010-03-11 09:32:21 -0600116 if (ret != 0) {
117 dev_err(&pdev->dev, "fail to register client devices\n");
Sachin Kamatc8eaed42013-06-18 15:35:40 +0530118 goto fail;
Miguel Aguilarca263082010-03-11 09:32:21 -0600119 }
120
121 return 0;
122
Sachin Kamatc8eaed42013-06-18 15:35:40 +0530123fail:
Miguel Aguilarca263082010-03-11 09:32:21 -0600124 clk_disable(davinci_vc->clk);
Miguel Aguilarca263082010-03-11 09:32:21 -0600125
126 return ret;
127}
128
Bill Pemberton4740f732012-11-19 13:26:01 -0500129static int davinci_vc_remove(struct platform_device *pdev)
Miguel Aguilarca263082010-03-11 09:32:21 -0600130{
131 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
132
133 mfd_remove_devices(&pdev->dev);
134
Miguel Aguilarca263082010-03-11 09:32:21 -0600135 clk_disable(davinci_vc->clk);
Miguel Aguilarca263082010-03-11 09:32:21 -0600136
Miguel Aguilarca263082010-03-11 09:32:21 -0600137 return 0;
138}
139
140static struct platform_driver davinci_vc_driver = {
141 .driver = {
142 .name = "davinci_voicecodec",
143 .owner = THIS_MODULE,
144 },
Bill Pemberton84449212012-11-19 13:20:24 -0500145 .remove = davinci_vc_remove,
Miguel Aguilarca263082010-03-11 09:32:21 -0600146};
147
Jingoo Han3de764d2013-03-05 13:48:28 +0900148module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
Miguel Aguilarca263082010-03-11 09:32:21 -0600149
150MODULE_AUTHOR("Miguel Aguilar");
151MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
152MODULE_LICENSE("GPL");