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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>
Mark Brown921a2c82013-08-31 14:08:56 +010030#include <linux/regmap.h>
Miguel Aguilarca263082010-03-11 09:32:21 -060031
32#include <sound/pcm.h>
33
34#include <linux/mfd/davinci_voicecodec.h>
35
Krzysztof Kozlowskib8d12ea2015-01-05 10:01:23 +010036static const struct regmap_config davinci_vc_regmap = {
Mark Brown921a2c82013-08-31 14:08:56 +010037 .reg_bits = 32,
38 .val_bits = 32,
39};
40
Miguel Aguilarca263082010-03-11 09:32:21 -060041static int __init davinci_vc_probe(struct platform_device *pdev)
42{
43 struct davinci_vc *davinci_vc;
Sachin Kamatc8eaed42013-06-18 15:35:40 +053044 struct resource *res;
Miguel Aguilarca263082010-03-11 09:32:21 -060045 struct mfd_cell *cell = NULL;
46 int ret;
47
Lee Jones099053a2013-05-23 16:25:11 +010048 davinci_vc = devm_kzalloc(&pdev->dev,
49 sizeof(struct davinci_vc), GFP_KERNEL);
Miguel Aguilarca263082010-03-11 09:32:21 -060050 if (!davinci_vc) {
51 dev_dbg(&pdev->dev,
52 "could not allocate memory for private data\n");
53 return -ENOMEM;
54 }
55
Sachin Kamatc8eaed42013-06-18 15:35:40 +053056 davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
Miguel Aguilarca263082010-03-11 09:32:21 -060057 if (IS_ERR(davinci_vc->clk)) {
58 dev_dbg(&pdev->dev,
59 "could not get the clock for voice codec\n");
Lee Jones099053a2013-05-23 16:25:11 +010060 return -ENODEV;
Miguel Aguilarca263082010-03-11 09:32:21 -060061 }
62 clk_enable(davinci_vc->clk);
63
64 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Miguel Aguilarca263082010-03-11 09:32:21 -060065
Sachin Kamatc8eaed42013-06-18 15:35:40 +053066 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;
Miguel Aguilarca263082010-03-11 09:32:21 -060070 }
71
Mark Brown921a2c82013-08-31 14:08:56 +010072 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
Miguel Aguilarca263082010-03-11 09:32:21 -060080 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
81 if (!res) {
82 dev_err(&pdev->dev, "no DMA resource\n");
Julia Lawalle2bde7872010-06-01 16:34:38 +020083 ret = -ENXIO;
Sachin Kamatc8eaed42013-06-18 15:35:40 +053084 goto fail;
Miguel Aguilarca263082010-03-11 09:32:21 -060085 }
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");
Julia Lawalle2bde7872010-06-01 16:34:38 +020094 ret = -ENXIO;
Sachin Kamatc8eaed42013-06-18 15:35:40 +053095 goto fail;
Miguel Aguilarca263082010-03-11 09:32:21 -060096 }
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];
Manjunathappa, Prakash73ee6522011-01-27 18:58:36 +0530107 cell->name = "davinci-vcif";
Samuel Ortizcb5811c2011-04-06 16:39:45 +0200108 cell->platform_data = davinci_vc;
109 cell->pdata_size = sizeof(*davinci_vc);
Miguel Aguilarca263082010-03-11 09:32:21 -0600110
111 /* Voice codec CQ93VC client */
112 cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
Manjunathappa, Prakash73ee6522011-01-27 18:58:36 +0530113 cell->name = "cq93vc-codec";
Samuel Ortizcb5811c2011-04-06 16:39:45 +0200114 cell->platform_data = davinci_vc;
115 cell->pdata_size = sizeof(*davinci_vc);
Miguel Aguilarca263082010-03-11 09:32:21 -0600116
117 ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
Mark Brown0848c942012-09-11 15:16:36 +0800118 DAVINCI_VC_CELLS, NULL, 0, NULL);
Miguel Aguilarca263082010-03-11 09:32:21 -0600119 if (ret != 0) {
120 dev_err(&pdev->dev, "fail to register client devices\n");
Sachin Kamatc8eaed42013-06-18 15:35:40 +0530121 goto fail;
Miguel Aguilarca263082010-03-11 09:32:21 -0600122 }
123
124 return 0;
125
Sachin Kamatc8eaed42013-06-18 15:35:40 +0530126fail:
Miguel Aguilarca263082010-03-11 09:32:21 -0600127 clk_disable(davinci_vc->clk);
Miguel Aguilarca263082010-03-11 09:32:21 -0600128
129 return ret;
130}
131
Bill Pemberton4740f732012-11-19 13:26:01 -0500132static int davinci_vc_remove(struct platform_device *pdev)
Miguel Aguilarca263082010-03-11 09:32:21 -0600133{
134 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
135
136 mfd_remove_devices(&pdev->dev);
137
Miguel Aguilarca263082010-03-11 09:32:21 -0600138 clk_disable(davinci_vc->clk);
Miguel Aguilarca263082010-03-11 09:32:21 -0600139
Miguel Aguilarca263082010-03-11 09:32:21 -0600140 return 0;
141}
142
143static struct platform_driver davinci_vc_driver = {
144 .driver = {
145 .name = "davinci_voicecodec",
Miguel Aguilarca263082010-03-11 09:32:21 -0600146 },
Bill Pemberton84449212012-11-19 13:20:24 -0500147 .remove = davinci_vc_remove,
Miguel Aguilarca263082010-03-11 09:32:21 -0600148};
149
Jingoo Han3de764d2013-03-05 13:48:28 +0900150module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
Miguel Aguilarca263082010-03-11 09:32:21 -0600151
152MODULE_AUTHOR("Miguel Aguilar");
153MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
154MODULE_LICENSE("GPL");