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
|
/*
* bf6xx-i2s.c - Analog Devices BF6XX i2s interface driver
*
* Copyright (c) 2012 Analog Devices Inc.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "bf6xx-sport.h"
struct sport_params param;
static int bfin_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct sport_device *sport = snd_soc_dai_get_drvdata(cpu_dai);
struct device *dev = &sport->pdev->dev;
int ret = 0;
param.spctl &= ~(SPORT_CTL_OPMODE | SPORT_CTL_CKRE | SPORT_CTL_FSR
| SPORT_CTL_LFS | SPORT_CTL_LAFS);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_CKRE
| SPORT_CTL_LFS;
break;
case SND_SOC_DAIFMT_DSP_A:
param.spctl |= SPORT_CTL_FSR;
break;
case SND_SOC_DAIFMT_LEFT_J:
param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_LFS
| SPORT_CTL_LAFS;
break;
default:
dev_err(dev, "%s: Unknown DAI format type\n", __func__);
ret = -EINVAL;
break;
}
param.spctl &= ~(SPORT_CTL_ICLK | SPORT_CTL_IFS);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
break;
case SND_SOC_DAIFMT_CBS_CFS:
case SND_SOC_DAIFMT_CBM_CFS:
case SND_SOC_DAIFMT_CBS_CFM:
ret = -EINVAL;
break;
default:
dev_err(dev, "%s: Unknown DAI master type\n", __func__);
ret = -EINVAL;
break;
}
return ret;
}
static int bfin_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
struct device *dev = &sport->pdev->dev;
int ret = 0;
param.spctl &= ~SPORT_CTL_SLEN;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
param.spctl |= 0x70;
sport->wdsize = 1;
case SNDRV_PCM_FORMAT_S16_LE:
param.spctl |= 0xf0;
sport->wdsize = 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
param.spctl |= 0x170;
sport->wdsize = 3;
break;
case SNDRV_PCM_FORMAT_S32_LE:
param.spctl |= 0x1f0;
sport->wdsize = 4;
break;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ret = sport_set_tx_params(sport, ¶m);
if (ret) {
dev_err(dev, "SPORT tx is busy!\n");
return ret;
}
} else {
ret = sport_set_rx_params(sport, ¶m);
if (ret) {
dev_err(dev, "SPORT rx is busy!\n");
return ret;
}
}
return 0;
}
#ifdef CONFIG_PM
static int bfin_i2s_suspend(struct snd_soc_dai *dai)
{
struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
if (dai->capture_active)
sport_rx_stop(sport);
if (dai->playback_active)
sport_tx_stop(sport);
return 0;
}
static int bfin_i2s_resume(struct snd_soc_dai *dai)
{
struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
struct device *dev = &sport->pdev->dev;
int ret;
ret = sport_set_tx_params(sport, ¶m);
if (ret) {
dev_err(dev, "SPORT tx is busy!\n");
return ret;
}
ret = sport_set_rx_params(sport, ¶m);
if (ret) {
dev_err(dev, "SPORT rx is busy!\n");
return ret;
}
return 0;
}
#else
#define bfin_i2s_suspend NULL
#define bfin_i2s_resume NULL
#endif
#define BFIN_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
SNDRV_PCM_RATE_96000)
#define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_ops bfin_i2s_dai_ops = {
.hw_params = bfin_i2s_hw_params,
.set_fmt = bfin_i2s_set_dai_fmt,
};
static struct snd_soc_dai_driver bfin_i2s_dai = {
.suspend = bfin_i2s_suspend,
.resume = bfin_i2s_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = BFIN_I2S_RATES,
.formats = BFIN_I2S_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = BFIN_I2S_RATES,
.formats = BFIN_I2S_FORMATS,
},
.ops = &bfin_i2s_dai_ops,
};
static int bfin_i2s_probe(struct platform_device *pdev)
{
struct sport_device *sport;
struct device *dev = &pdev->dev;
int ret;
sport = sport_create(pdev);
if (!sport)
return -ENODEV;
/* register with the ASoC layers */
ret = snd_soc_register_dai(dev, &bfin_i2s_dai);
if (ret) {
dev_err(dev, "Failed to register DAI: %d\n", ret);
sport_delete(sport);
return ret;
}
platform_set_drvdata(pdev, sport);
return 0;
}
static int bfin_i2s_remove(struct platform_device *pdev)
{
struct sport_device *sport = platform_get_drvdata(pdev);
snd_soc_unregister_dai(&pdev->dev);
sport_delete(sport);
return 0;
}
static struct platform_driver bfin_i2s_driver = {
.probe = bfin_i2s_probe,
.remove = bfin_i2s_remove,
.driver = {
.name = "bfin-i2s",
.owner = THIS_MODULE,
},
};
module_platform_driver(bfin_i2s_driver);
MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver");
MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
MODULE_LICENSE("GPL v2");
|
