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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> | |
62731d33 | 36 | #include <sound/dmaengine_pcm.h> |
e155fcc2 | 37 | |
62731d33 | 38 | #include "edma-pcm.h" |
e155fcc2 | 39 | #include "davinci-i2s.h" |
e155fcc2 MA |
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; | |
62731d33 PU |
51 | struct snd_dmaengine_dai_dma_data dma_data[2]; |
52 | int dma_request[2]; | |
e155fcc2 MA |
53 | }; |
54 | ||
55 | static void davinci_vcif_start(struct snd_pcm_substream *substream) | |
56 | { | |
57 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
58 | struct davinci_vcif_dev *davinci_vcif_dev = | |
f0fba2ad | 59 | snd_soc_dai_get_drvdata(rtd->cpu_dai); |
e155fcc2 MA |
60 | struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
61 | u32 w; | |
62 | ||
63 | /* Start the sample generator and enable transmitter/receiver */ | |
64 | w = readl(davinci_vc->base + DAVINCI_VC_CTRL); | |
65 | ||
66 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
3012f43e | 67 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0); |
e155fcc2 | 68 | else |
3012f43e | 69 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0); |
e155fcc2 MA |
70 | |
71 | writel(w, davinci_vc->base + DAVINCI_VC_CTRL); | |
72 | } | |
73 | ||
74 | static void davinci_vcif_stop(struct snd_pcm_substream *substream) | |
75 | { | |
76 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
77 | struct davinci_vcif_dev *davinci_vcif_dev = | |
f0fba2ad | 78 | snd_soc_dai_get_drvdata(rtd->cpu_dai); |
e155fcc2 MA |
79 | struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
80 | u32 w; | |
81 | ||
82 | /* Reset transmitter/receiver and sample rate/frame sync generators */ | |
83 | w = readl(davinci_vc->base + DAVINCI_VC_CTRL); | |
84 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
3012f43e | 85 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1); |
e155fcc2 | 86 | else |
3012f43e | 87 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1); |
e155fcc2 MA |
88 | |
89 | writel(w, davinci_vc->base + DAVINCI_VC_CTRL); | |
90 | } | |
91 | ||
92 | static int davinci_vcif_hw_params(struct snd_pcm_substream *substream, | |
93 | struct snd_pcm_hw_params *params, | |
94 | struct snd_soc_dai *dai) | |
95 | { | |
f0fba2ad | 96 | struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai); |
e155fcc2 | 97 | struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc; |
e155fcc2 MA |
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: | |
e155fcc2 MA |
116 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | |
117 | DAVINCI_VC_CTRL_RD_UNSIGNED | | |
118 | DAVINCI_VC_CTRL_WD_BITS_8 | | |
119 | DAVINCI_VC_CTRL_WD_UNSIGNED, 1); | |
120 | break; | |
121 | case SNDRV_PCM_FORMAT_S8: | |
e155fcc2 MA |
122 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | |
123 | DAVINCI_VC_CTRL_WD_BITS_8, 1); | |
124 | ||
125 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED | | |
126 | DAVINCI_VC_CTRL_WD_UNSIGNED, 0); | |
127 | break; | |
128 | case SNDRV_PCM_FORMAT_S16_LE: | |
e155fcc2 MA |
129 | MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 | |
130 | DAVINCI_VC_CTRL_RD_UNSIGNED | | |
131 | DAVINCI_VC_CTRL_WD_BITS_8 | | |
132 | DAVINCI_VC_CTRL_WD_UNSIGNED, 0); | |
133 | break; | |
134 | default: | |
135 | printk(KERN_WARNING "davinci-vcif: unsupported PCM format"); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
e155fcc2 MA |
139 | writel(w, davinci_vc->base + DAVINCI_VC_CTRL); |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd, | |
145 | struct snd_soc_dai *dai) | |
146 | { | |
147 | int ret = 0; | |
148 | ||
149 | switch (cmd) { | |
150 | case SNDRV_PCM_TRIGGER_START: | |
151 | case SNDRV_PCM_TRIGGER_RESUME: | |
152 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
153 | davinci_vcif_start(substream); | |
82d1d521 | 154 | break; |
e155fcc2 MA |
155 | case SNDRV_PCM_TRIGGER_STOP: |
156 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
157 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
158 | davinci_vcif_stop(substream); | |
159 | break; | |
160 | default: | |
161 | ret = -EINVAL; | |
162 | } | |
163 | ||
164 | return ret; | |
165 | } | |
166 | ||
167 | #define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000 | |
168 | ||
85e7652d | 169 | static const struct snd_soc_dai_ops davinci_vcif_dai_ops = { |
e155fcc2 MA |
170 | .trigger = davinci_vcif_trigger, |
171 | .hw_params = davinci_vcif_hw_params, | |
172 | }; | |
173 | ||
62731d33 PU |
174 | static int davinci_vcif_dai_probe(struct snd_soc_dai *dai) |
175 | { | |
176 | struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai); | |
177 | ||
178 | dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK]; | |
179 | dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE]; | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
f0fba2ad | 184 | static struct snd_soc_dai_driver davinci_vcif_dai = { |
62731d33 | 185 | .probe = davinci_vcif_dai_probe, |
e155fcc2 MA |
186 | .playback = { |
187 | .channels_min = 1, | |
188 | .channels_max = 2, | |
189 | .rates = DAVINCI_VCIF_RATES, | |
190 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
191 | .capture = { | |
192 | .channels_min = 1, | |
193 | .channels_max = 2, | |
194 | .rates = DAVINCI_VCIF_RATES, | |
195 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
196 | .ops = &davinci_vcif_dai_ops, | |
197 | ||
198 | }; | |
e155fcc2 | 199 | |
ee226ce1 KM |
200 | static const struct snd_soc_component_driver davinci_vcif_component = { |
201 | .name = "davinci-vcif", | |
202 | }; | |
203 | ||
e155fcc2 MA |
204 | static int davinci_vcif_probe(struct platform_device *pdev) |
205 | { | |
cb5811cf | 206 | struct davinci_vc *davinci_vc = pdev->dev.platform_data; |
e155fcc2 MA |
207 | struct davinci_vcif_dev *davinci_vcif_dev; |
208 | int ret; | |
209 | ||
a3bb8f3f JL |
210 | davinci_vcif_dev = devm_kzalloc(&pdev->dev, |
211 | sizeof(struct davinci_vcif_dev), | |
212 | 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; | |
62731d33 PU |
221 | davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = |
222 | &davinci_vc->davinci_vcif.dma_tx_channel; | |
223 | davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr = | |
224 | davinci_vc->davinci_vcif.dma_tx_addr; | |
e155fcc2 MA |
225 | |
226 | /* DMA rx params */ | |
62731d33 PU |
227 | davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = |
228 | &davinci_vc->davinci_vcif.dma_rx_channel; | |
229 | davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr = | |
230 | davinci_vc->davinci_vcif.dma_rx_addr; | |
e155fcc2 | 231 | |
f0fba2ad | 232 | dev_set_drvdata(&pdev->dev, davinci_vcif_dev); |
e155fcc2 | 233 | |
ee226ce1 KM |
234 | ret = snd_soc_register_component(&pdev->dev, &davinci_vcif_component, |
235 | &davinci_vcif_dai, 1); | |
e155fcc2 MA |
236 | if (ret != 0) { |
237 | dev_err(&pdev->dev, "could not register dai\n"); | |
a3bb8f3f | 238 | return ret; |
e155fcc2 MA |
239 | } |
240 | ||
62731d33 | 241 | ret = edma_pcm_platform_register(&pdev->dev); |
f08095a4 HG |
242 | if (ret) { |
243 | dev_err(&pdev->dev, "register PCM failed: %d\n", ret); | |
ee226ce1 | 244 | snd_soc_unregister_component(&pdev->dev); |
f08095a4 HG |
245 | return ret; |
246 | } | |
247 | ||
e155fcc2 | 248 | return 0; |
e155fcc2 MA |
249 | } |
250 | ||
251 | static int davinci_vcif_remove(struct platform_device *pdev) | |
252 | { | |
ee226ce1 | 253 | snd_soc_unregister_component(&pdev->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 | }, |
264 | }; | |
265 | ||
f9b8a514 | 266 | module_platform_driver(davinci_vcif_driver); |
e155fcc2 MA |
267 | |
268 | MODULE_AUTHOR("Miguel Aguilar"); | |
269 | MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface"); | |
270 | MODULE_LICENSE("GPL"); |