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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" | |
e155fcc2 MA |
39 | |
40 | #define MOD_REG_BIT(val, mask, set) do { \ | |
41 | if (set) { \ | |
42 | val |= mask; \ | |
43 | } else { \ | |
44 | val &= ~mask; \ | |
45 | } \ | |
46 | } while (0) | |
47 | ||
48 | struct davinci_vcif_dev { | |
49 | struct davinci_vc *davinci_vc; | |
50 | struct davinci_pcm_dma_params dma_params[2]; | |
51 | }; | |
52 | ||
53 | static void davinci_vcif_start(struct snd_pcm_substream *substream) | |
54 | { | |
55 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
56 | struct davinci_vcif_dev *davinci_vcif_dev = | |
f0fba2ad | 57 | snd_soc_dai_get_drvdata(rtd->cpu_dai); |
e155fcc2 MA |
58 | struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
59 | u32 w; | |
60 | ||
61 | /* Start the sample generator and enable transmitter/receiver */ | |
62 | w = readl(davinci_vc->base + DAVINCI_VC_CTRL); | |
63 | ||
64 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
65 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1); | |
66 | else | |
67 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1); | |
68 | ||
69 | writel(w, davinci_vc->base + DAVINCI_VC_CTRL); | |
70 | } | |
71 | ||
72 | static void davinci_vcif_stop(struct snd_pcm_substream *substream) | |
73 | { | |
74 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
75 | struct davinci_vcif_dev *davinci_vcif_dev = | |
f0fba2ad | 76 | snd_soc_dai_get_drvdata(rtd->cpu_dai); |
e155fcc2 MA |
77 | struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
78 | u32 w; | |
79 | ||
80 | /* Reset transmitter/receiver and sample rate/frame sync generators */ | |
81 | w = readl(davinci_vc->base + DAVINCI_VC_CTRL); | |
82 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
83 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0); | |
84 | else | |
85 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0); | |
86 | ||
87 | writel(w, davinci_vc->base + DAVINCI_VC_CTRL); | |
88 | } | |
89 | ||
90 | static int davinci_vcif_hw_params(struct snd_pcm_substream *substream, | |
91 | struct snd_pcm_hw_params *params, | |
92 | struct snd_soc_dai *dai) | |
93 | { | |
f0fba2ad | 94 | struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai); |
e155fcc2 MA |
95 | struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
96 | struct davinci_pcm_dma_params *dma_params = | |
97 | &davinci_vcif_dev->dma_params[substream->stream]; | |
98 | u32 w; | |
99 | ||
100 | /* Restart the codec before setup */ | |
101 | davinci_vcif_stop(substream); | |
102 | davinci_vcif_start(substream); | |
103 | ||
104 | /* General line settings */ | |
105 | writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL); | |
106 | ||
107 | writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR); | |
108 | ||
109 | writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN); | |
110 | ||
111 | w = readl(davinci_vc->base + DAVINCI_VC_CTRL); | |
112 | ||
113 | /* Determine xfer data type */ | |
114 | switch (params_format(params)) { | |
115 | case SNDRV_PCM_FORMAT_U8: | |
116 | dma_params->data_type = 0; | |
117 | ||
118 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | | |
119 | DAVINCI_VC_CTRL_RD_UNSIGNED | | |
120 | DAVINCI_VC_CTRL_WD_BITS_8 | | |
121 | DAVINCI_VC_CTRL_WD_UNSIGNED, 1); | |
122 | break; | |
123 | case SNDRV_PCM_FORMAT_S8: | |
124 | dma_params->data_type = 1; | |
125 | ||
126 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | | |
127 | DAVINCI_VC_CTRL_WD_BITS_8, 1); | |
128 | ||
129 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED | | |
130 | DAVINCI_VC_CTRL_WD_UNSIGNED, 0); | |
131 | break; | |
132 | case SNDRV_PCM_FORMAT_S16_LE: | |
133 | dma_params->data_type = 2; | |
134 | ||
135 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | | |
136 | DAVINCI_VC_CTRL_RD_UNSIGNED | | |
137 | DAVINCI_VC_CTRL_WD_BITS_8 | | |
138 | DAVINCI_VC_CTRL_WD_UNSIGNED, 0); | |
139 | break; | |
140 | default: | |
141 | printk(KERN_WARNING "davinci-vcif: unsupported PCM format"); | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | dma_params->acnt = dma_params->data_type; | |
146 | ||
147 | writel(w, davinci_vc->base + DAVINCI_VC_CTRL); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd, | |
153 | struct snd_soc_dai *dai) | |
154 | { | |
155 | int ret = 0; | |
156 | ||
157 | switch (cmd) { | |
158 | case SNDRV_PCM_TRIGGER_START: | |
159 | case SNDRV_PCM_TRIGGER_RESUME: | |
160 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
161 | davinci_vcif_start(substream); | |
162 | case SNDRV_PCM_TRIGGER_STOP: | |
163 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
164 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
165 | davinci_vcif_stop(substream); | |
166 | break; | |
167 | default: | |
168 | ret = -EINVAL; | |
169 | } | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
bedad0ca CPE |
174 | static int davinci_vcif_startup(struct snd_pcm_substream *substream, |
175 | struct snd_soc_dai *dai) | |
176 | { | |
177 | struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai); | |
178 | ||
179 | snd_soc_dai_set_dma_data(dai, substream, dev->dma_params); | |
180 | return 0; | |
181 | } | |
182 | ||
e155fcc2 MA |
183 | #define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000 |
184 | ||
185 | static struct snd_soc_dai_ops davinci_vcif_dai_ops = { | |
bedad0ca | 186 | .startup = davinci_vcif_startup, |
e155fcc2 MA |
187 | .trigger = davinci_vcif_trigger, |
188 | .hw_params = davinci_vcif_hw_params, | |
189 | }; | |
190 | ||
f0fba2ad | 191 | static struct snd_soc_dai_driver davinci_vcif_dai = { |
e155fcc2 MA |
192 | .playback = { |
193 | .channels_min = 1, | |
194 | .channels_max = 2, | |
195 | .rates = DAVINCI_VCIF_RATES, | |
196 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
197 | .capture = { | |
198 | .channels_min = 1, | |
199 | .channels_max = 2, | |
200 | .rates = DAVINCI_VCIF_RATES, | |
201 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
202 | .ops = &davinci_vcif_dai_ops, | |
203 | ||
204 | }; | |
e155fcc2 MA |
205 | |
206 | static int davinci_vcif_probe(struct platform_device *pdev) | |
207 | { | |
d5776337 | 208 | struct davinci_vc *davinci_vc = mfd_get_data(pdev); |
e155fcc2 MA |
209 | struct davinci_vcif_dev *davinci_vcif_dev; |
210 | int ret; | |
211 | ||
212 | davinci_vcif_dev = kzalloc(sizeof(struct davinci_vcif_dev), GFP_KERNEL); | |
55938b10 | 213 | if (!davinci_vcif_dev) { |
e155fcc2 MA |
214 | dev_dbg(&pdev->dev, |
215 | "could not allocate memory for private data\n"); | |
216 | return -ENOMEM; | |
217 | } | |
218 | ||
219 | /* DMA tx params */ | |
220 | davinci_vcif_dev->davinci_vc = davinci_vc; | |
221 | davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel = | |
222 | davinci_vc->davinci_vcif.dma_tx_channel; | |
223 | davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr = | |
224 | davinci_vc->davinci_vcif.dma_tx_addr; | |
225 | ||
226 | /* DMA rx params */ | |
227 | davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel = | |
228 | davinci_vc->davinci_vcif.dma_rx_channel; | |
229 | davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr = | |
230 | davinci_vc->davinci_vcif.dma_rx_addr; | |
231 | ||
f0fba2ad | 232 | dev_set_drvdata(&pdev->dev, davinci_vcif_dev); |
e155fcc2 | 233 | |
f0fba2ad | 234 | ret = snd_soc_register_dai(&pdev->dev, &davinci_vcif_dai); |
e155fcc2 MA |
235 | if (ret != 0) { |
236 | dev_err(&pdev->dev, "could not register dai\n"); | |
237 | goto fail; | |
238 | } | |
239 | ||
240 | return 0; | |
241 | ||
242 | fail: | |
243 | kfree(davinci_vcif_dev); | |
244 | ||
245 | return ret; | |
246 | } | |
247 | ||
248 | static int davinci_vcif_remove(struct platform_device *pdev) | |
249 | { | |
8b6b30ab AL |
250 | struct davinci_vcif_dev *davinci_vcif_dev = dev_get_drvdata(&pdev->dev); |
251 | ||
f0fba2ad | 252 | snd_soc_unregister_dai(&pdev->dev); |
8b6b30ab | 253 | kfree(davinci_vcif_dev); |
e155fcc2 MA |
254 | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static struct platform_driver davinci_vcif_driver = { | |
259 | .probe = davinci_vcif_probe, | |
260 | .remove = davinci_vcif_remove, | |
261 | .driver = { | |
f0fba2ad | 262 | .name = "davinci-vcif", |
e155fcc2 MA |
263 | .owner = THIS_MODULE, |
264 | }, | |
265 | }; | |
266 | ||
267 | static int __init davinci_vcif_init(void) | |
268 | { | |
269 | return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe); | |
270 | } | |
271 | module_init(davinci_vcif_init); | |
272 | ||
273 | static void __exit davinci_vcif_exit(void) | |
274 | { | |
275 | platform_driver_unregister(&davinci_vcif_driver); | |
276 | } | |
277 | module_exit(davinci_vcif_exit); | |
278 | ||
279 | MODULE_AUTHOR("Miguel Aguilar"); | |
280 | MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface"); | |
281 | MODULE_LICENSE("GPL"); |