Commit | Line | Data |
---|---|---|
db72c2f8 MLC |
1 | /* |
2 | * omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port | |
3 | * | |
4 | * Copyright (C) 2009 Texas Instruments | |
5 | * | |
6 | * Author: Misael Lopez Cruz <x0052729@ti.com> | |
7 | * Contact: Jorge Eduardo Candelaria <x0107209@ti.com> | |
8 | * Margarita Olaya <magi.olaya@ti.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * version 2 as published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
22 | * 02110-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/init.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/device.h> | |
29 | #include <sound/core.h> | |
30 | #include <sound/pcm.h> | |
31 | #include <sound/pcm_params.h> | |
32 | #include <sound/initval.h> | |
33 | #include <sound/soc.h> | |
34 | ||
35 | #include <plat/control.h> | |
36 | #include <plat/dma.h> | |
37 | #include <plat/mcbsp.h> | |
38 | #include "mcpdm.h" | |
39 | #include "omap-mcpdm.h" | |
40 | #include "omap-pcm.h" | |
41 | ||
42 | struct omap_mcpdm_data { | |
43 | struct omap_mcpdm_link *links; | |
44 | int active; | |
45 | }; | |
46 | ||
47 | static struct omap_mcpdm_link omap_mcpdm_links[] = { | |
48 | /* downlink */ | |
49 | { | |
50 | .irq_mask = MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL, | |
51 | .threshold = 1, | |
52 | .format = PDMOUTFORMAT_LJUST, | |
53 | }, | |
54 | /* uplink */ | |
55 | { | |
56 | .irq_mask = MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL, | |
57 | .threshold = 1, | |
58 | .format = PDMOUTFORMAT_LJUST, | |
59 | }, | |
60 | }; | |
61 | ||
62 | static struct omap_mcpdm_data mcpdm_data = { | |
63 | .links = omap_mcpdm_links, | |
64 | .active = 0, | |
65 | }; | |
66 | ||
67 | /* | |
68 | * Stream DMA parameters | |
69 | */ | |
70 | static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = { | |
71 | { | |
72 | .name = "Audio playback", | |
73 | .dma_req = OMAP44XX_DMA_MCPDM_DL, | |
74 | .data_type = OMAP_DMA_DATA_TYPE_S32, | |
75 | .sync_mode = OMAP_DMA_SYNC_PACKET, | |
76 | .packet_size = 16, | |
77 | .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA, | |
78 | }, | |
79 | { | |
80 | .name = "Audio capture", | |
81 | .dma_req = OMAP44XX_DMA_MCPDM_UP, | |
82 | .data_type = OMAP_DMA_DATA_TYPE_S32, | |
83 | .sync_mode = OMAP_DMA_SYNC_PACKET, | |
84 | .packet_size = 16, | |
85 | .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA, | |
86 | }, | |
87 | }; | |
88 | ||
89 | static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream, | |
90 | struct snd_soc_dai *dai) | |
91 | { | |
92 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
93 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
94 | int err = 0; | |
95 | ||
96 | if (!cpu_dai->active) | |
97 | err = omap_mcpdm_request(); | |
98 | ||
99 | return err; | |
100 | } | |
101 | ||
102 | static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream, | |
103 | struct snd_soc_dai *dai) | |
104 | { | |
105 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
106 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
107 | ||
108 | if (!cpu_dai->active) | |
109 | omap_mcpdm_free(); | |
110 | } | |
111 | ||
112 | static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd, | |
113 | struct snd_soc_dai *dai) | |
114 | { | |
115 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
116 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
117 | struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data; | |
118 | int stream = substream->stream; | |
119 | int err = 0; | |
120 | ||
121 | switch (cmd) { | |
122 | case SNDRV_PCM_TRIGGER_START: | |
123 | case SNDRV_PCM_TRIGGER_RESUME: | |
124 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
125 | if (!mcpdm_priv->active++) | |
126 | omap_mcpdm_start(stream); | |
127 | break; | |
128 | ||
129 | case SNDRV_PCM_TRIGGER_STOP: | |
130 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
131 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
132 | if (!--mcpdm_priv->active) | |
133 | omap_mcpdm_stop(stream); | |
134 | break; | |
135 | default: | |
136 | err = -EINVAL; | |
137 | } | |
138 | ||
139 | return err; | |
140 | } | |
141 | ||
142 | static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream, | |
143 | struct snd_pcm_hw_params *params, | |
144 | struct snd_soc_dai *dai) | |
145 | { | |
146 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
147 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
148 | struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data; | |
149 | struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links; | |
150 | int stream = substream->stream; | |
151 | int channels, err, link_mask = 0; | |
152 | ||
5f712b2b DM |
153 | snd_soc_dai_set_dma_data(cpu_dai, substream, |
154 | &omap_mcpdm_dai_dma_params[stream]); | |
db72c2f8 MLC |
155 | |
156 | channels = params_channels(params); | |
157 | switch (channels) { | |
158 | case 4: | |
159 | if (stream == SNDRV_PCM_STREAM_CAPTURE) | |
160 | /* up to 2 channels for capture */ | |
161 | return -EINVAL; | |
162 | link_mask |= 1 << 3; | |
163 | case 3: | |
164 | if (stream == SNDRV_PCM_STREAM_CAPTURE) | |
165 | /* up to 2 channels for capture */ | |
166 | return -EINVAL; | |
167 | link_mask |= 1 << 2; | |
168 | case 2: | |
169 | link_mask |= 1 << 1; | |
170 | case 1: | |
171 | link_mask |= 1 << 0; | |
172 | break; | |
173 | default: | |
174 | /* unsupported number of channels */ | |
175 | return -EINVAL; | |
176 | } | |
177 | ||
178 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
179 | mcpdm_links[stream].channels = link_mask << 3; | |
180 | err = omap_mcpdm_playback_open(&mcpdm_links[stream]); | |
181 | } else { | |
182 | mcpdm_links[stream].channels = link_mask << 0; | |
183 | err = omap_mcpdm_capture_open(&mcpdm_links[stream]); | |
184 | } | |
185 | ||
186 | return err; | |
187 | } | |
188 | ||
189 | static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream, | |
190 | struct snd_soc_dai *dai) | |
191 | { | |
192 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
193 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
194 | struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data; | |
195 | struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links; | |
196 | int stream = substream->stream; | |
197 | int err; | |
198 | ||
199 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
200 | err = omap_mcpdm_playback_close(&mcpdm_links[stream]); | |
201 | else | |
202 | err = omap_mcpdm_capture_close(&mcpdm_links[stream]); | |
203 | ||
204 | return err; | |
205 | } | |
206 | ||
207 | static struct snd_soc_dai_ops omap_mcpdm_dai_ops = { | |
208 | .startup = omap_mcpdm_dai_startup, | |
209 | .shutdown = omap_mcpdm_dai_shutdown, | |
210 | .trigger = omap_mcpdm_dai_trigger, | |
211 | .hw_params = omap_mcpdm_dai_hw_params, | |
212 | .hw_free = omap_mcpdm_dai_hw_free, | |
213 | }; | |
214 | ||
215 | #define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) | |
216 | #define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE) | |
217 | ||
218 | struct snd_soc_dai omap_mcpdm_dai = { | |
219 | .name = "omap-mcpdm", | |
220 | .id = -1, | |
221 | .playback = { | |
222 | .channels_min = 1, | |
223 | .channels_max = 4, | |
224 | .rates = OMAP_MCPDM_RATES, | |
225 | .formats = OMAP_MCPDM_FORMATS, | |
226 | }, | |
227 | .capture = { | |
228 | .channels_min = 1, | |
229 | .channels_max = 2, | |
230 | .rates = OMAP_MCPDM_RATES, | |
231 | .formats = OMAP_MCPDM_FORMATS, | |
232 | }, | |
233 | .ops = &omap_mcpdm_dai_ops, | |
234 | .private_data = &mcpdm_data, | |
235 | }; | |
236 | EXPORT_SYMBOL_GPL(omap_mcpdm_dai); | |
237 | ||
238 | static int __init snd_omap_mcpdm_init(void) | |
239 | { | |
240 | return snd_soc_register_dai(&omap_mcpdm_dai); | |
241 | } | |
242 | module_init(snd_omap_mcpdm_init); | |
243 | ||
244 | static void __exit snd_omap_mcpdm_exit(void) | |
245 | { | |
246 | snd_soc_unregister_dai(&omap_mcpdm_dai); | |
247 | } | |
248 | module_exit(snd_omap_mcpdm_exit); | |
249 | ||
250 | MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>"); | |
251 | MODULE_DESCRIPTION("OMAP PDM SoC Interface"); | |
252 | MODULE_LICENSE("GPL"); |