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-rw-r--r--sound/soc/davinci/davinci-vcif.c274
1 files changed, 274 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-vcif.c b/sound/soc/davinci/davinci-vcif.c
new file mode 100644
index 000000000000..9aa980d38231
--- /dev/null
+++ b/sound/soc/davinci/davinci-vcif.c
@@ -0,0 +1,274 @@
1/*
2 * ALSA SoC Voice Codec Interface for TI DAVINCI processor
3 *
4 * Copyright (C) 2010 Texas Instruments.
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/delay.h>
27#include <linux/slab.h>
28#include <linux/io.h>
29#include <linux/mfd/davinci_voicecodec.h>
30
31#include <sound/core.h>
32#include <sound/pcm.h>
33#include <sound/pcm_params.h>
34#include <sound/initval.h>
35#include <sound/soc.h>
36
37#include "davinci-pcm.h"
38#include "davinci-i2s.h"
39#include "davinci-vcif.h"
40
41#define MOD_REG_BIT(val, mask, set) do { \
42 if (set) { \
43 val |= mask; \
44 } else { \
45 val &= ~mask; \
46 } \
47} while (0)
48
49struct davinci_vcif_dev {
50 struct davinci_vc *davinci_vc;
51 struct davinci_pcm_dma_params dma_params[2];
52};
53
54static void davinci_vcif_start(struct snd_pcm_substream *substream)
55{
56 struct snd_soc_pcm_runtime *rtd = substream->private_data;
57 struct davinci_vcif_dev *davinci_vcif_dev =
58 rtd->dai->cpu_dai->private_data;
59 struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
60 u32 w;
61
62 /* Start the sample generator and enable transmitter/receiver */
63 w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
64
65 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
66 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
67 else
68 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
69
70 writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
71}
72
73static void davinci_vcif_stop(struct snd_pcm_substream *substream)
74{
75 struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 struct davinci_vcif_dev *davinci_vcif_dev =
77 rtd->dai->cpu_dai->private_data;
78 struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
79 u32 w;
80
81 /* Reset transmitter/receiver and sample rate/frame sync generators */
82 w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
83 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
84 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
85 else
86 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
87
88 writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
89}
90
91static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
92 struct snd_pcm_hw_params *params,
93 struct snd_soc_dai *dai)
94{
95 struct davinci_vcif_dev *davinci_vcif_dev = dai->private_data;
96 struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
97 struct davinci_pcm_dma_params *dma_params =
98 &davinci_vcif_dev->dma_params[substream->stream];
99 u32 w;
100
101 /* Restart the codec before setup */
102 davinci_vcif_stop(substream);
103 davinci_vcif_start(substream);
104
105 /* General line settings */
106 writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
107
108 writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
109
110 writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
111
112 w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
113
114 /* Determine xfer data type */
115 switch (params_format(params)) {
116 case SNDRV_PCM_FORMAT_U8:
117 dma_params->data_type = 0;
118
119 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
120 DAVINCI_VC_CTRL_RD_UNSIGNED |
121 DAVINCI_VC_CTRL_WD_BITS_8 |
122 DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
123 break;
124 case SNDRV_PCM_FORMAT_S8:
125 dma_params->data_type = 1;
126
127 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
128 DAVINCI_VC_CTRL_WD_BITS_8, 1);
129
130 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED |
131 DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
132 break;
133 case SNDRV_PCM_FORMAT_S16_LE:
134 dma_params->data_type = 2;
135
136 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
137 DAVINCI_VC_CTRL_RD_UNSIGNED |
138 DAVINCI_VC_CTRL_WD_BITS_8 |
139 DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
140 break;
141 default:
142 printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
143 return -EINVAL;
144 }
145
146 dma_params->acnt = dma_params->data_type;
147
148 writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
149
150 return 0;
151}
152
153static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
154 struct snd_soc_dai *dai)
155{
156 int ret = 0;
157
158 switch (cmd) {
159 case SNDRV_PCM_TRIGGER_START:
160 case SNDRV_PCM_TRIGGER_RESUME:
161 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
162 davinci_vcif_start(substream);
163 case SNDRV_PCM_TRIGGER_STOP:
164 case SNDRV_PCM_TRIGGER_SUSPEND:
165 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
166 davinci_vcif_stop(substream);
167 break;
168 default:
169 ret = -EINVAL;
170 }
171
172 return ret;
173}
174
175#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
176
177static struct snd_soc_dai_ops davinci_vcif_dai_ops = {
178 .trigger = davinci_vcif_trigger,
179 .hw_params = davinci_vcif_hw_params,
180};
181
182struct snd_soc_dai davinci_vcif_dai = {
183 .name = "davinci-vcif",
184 .playback = {
185 .channels_min = 1,
186 .channels_max = 2,
187 .rates = DAVINCI_VCIF_RATES,
188 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
189 .capture = {
190 .channels_min = 1,
191 .channels_max = 2,
192 .rates = DAVINCI_VCIF_RATES,
193 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
194 .ops = &davinci_vcif_dai_ops,
195
196};
197EXPORT_SYMBOL_GPL(davinci_vcif_dai);
198
199static int davinci_vcif_probe(struct platform_device *pdev)
200{
201 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
202 struct davinci_vcif_dev *davinci_vcif_dev;
203 int ret;
204
205 davinci_vcif_dev = kzalloc(sizeof(struct davinci_vcif_dev), GFP_KERNEL);
206 if (!davinci_vc) {
207 dev_dbg(&pdev->dev,
208 "could not allocate memory for private data\n");
209 return -ENOMEM;
210 }
211
212 /* DMA tx params */
213 davinci_vcif_dev->davinci_vc = davinci_vc;
214 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel =
215 davinci_vc->davinci_vcif.dma_tx_channel;
216 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr =
217 davinci_vc->davinci_vcif.dma_tx_addr;
218
219 /* DMA rx params */
220 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel =
221 davinci_vc->davinci_vcif.dma_rx_channel;
222 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr =
223 davinci_vc->davinci_vcif.dma_rx_addr;
224
225 davinci_vcif_dai.dev = &pdev->dev;
226 davinci_vcif_dai.capture.dma_data = davinci_vcif_dev->dma_params;
227 davinci_vcif_dai.playback.dma_data = davinci_vcif_dev->dma_params;
228 davinci_vcif_dai.private_data = davinci_vcif_dev;
229
230 ret = snd_soc_register_dai(&davinci_vcif_dai);
231 if (ret != 0) {
232 dev_err(&pdev->dev, "could not register dai\n");
233 goto fail;
234 }
235
236 return 0;
237
238fail:
239 kfree(davinci_vcif_dev);
240
241 return ret;
242}
243
244static int davinci_vcif_remove(struct platform_device *pdev)
245{
246 snd_soc_unregister_dai(&davinci_vcif_dai);
247
248 return 0;
249}
250
251static struct platform_driver davinci_vcif_driver = {
252 .probe = davinci_vcif_probe,
253 .remove = davinci_vcif_remove,
254 .driver = {
255 .name = "davinci_vcif",
256 .owner = THIS_MODULE,
257 },
258};
259
260static int __init davinci_vcif_init(void)
261{
262 return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe);
263}
264module_init(davinci_vcif_init);
265
266static void __exit davinci_vcif_exit(void)
267{
268 platform_driver_unregister(&davinci_vcif_driver);
269}
270module_exit(davinci_vcif_exit);
271
272MODULE_AUTHOR("Miguel Aguilar");
273MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
274MODULE_LICENSE("GPL");