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e155fcc2 MA |
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> | |
923a0042 | 27 | #include <linux/slab.h> |
e155fcc2 MA |
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 | ||
49 | struct davinci_vcif_dev { | |
50 | struct davinci_vc *davinci_vc; | |
51 | struct davinci_pcm_dma_params dma_params[2]; | |
52 | }; | |
53 | ||
54 | static 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 | ||
73 | static 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 | ||
91 | static 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 | ||
153 | static 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 | ||
177 | static struct snd_soc_dai_ops davinci_vcif_dai_ops = { | |
178 | .trigger = davinci_vcif_trigger, | |
179 | .hw_params = davinci_vcif_hw_params, | |
180 | }; | |
181 | ||
182 | struct 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 | }; | |
197 | EXPORT_SYMBOL_GPL(davinci_vcif_dai); | |
198 | ||
199 | static 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); | |
55938b10 | 206 | if (!davinci_vcif_dev) { |
e155fcc2 MA |
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; | |
fd23b7de DM |
226 | davinci_vcif_dai.capture.dma_data = davinci_vcif_dev->dma_params; |
227 | davinci_vcif_dai.playback.dma_data = davinci_vcif_dev->dma_params; | |
e155fcc2 MA |
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 | ||
238 | fail: | |
239 | kfree(davinci_vcif_dev); | |
240 | ||
241 | return ret; | |
242 | } | |
243 | ||
244 | static int davinci_vcif_remove(struct platform_device *pdev) | |
245 | { | |
246 | snd_soc_unregister_dai(&davinci_vcif_dai); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | static 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 | ||
260 | static int __init davinci_vcif_init(void) | |
261 | { | |
262 | return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe); | |
263 | } | |
264 | module_init(davinci_vcif_init); | |
265 | ||
266 | static void __exit davinci_vcif_exit(void) | |
267 | { | |
268 | platform_driver_unregister(&davinci_vcif_driver); | |
269 | } | |
270 | module_exit(davinci_vcif_exit); | |
271 | ||
272 | MODULE_AUTHOR("Miguel Aguilar"); | |
273 | MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface"); | |
274 | MODULE_LICENSE("GPL"); |