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