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-rw-r--r--sound/soc/blackfin/bf6xx-i2s.c234
1 files changed, 234 insertions, 0 deletions
diff --git a/sound/soc/blackfin/bf6xx-i2s.c b/sound/soc/blackfin/bf6xx-i2s.c
new file mode 100644
index 000000000000..c3c2466d3a42
--- /dev/null
+++ b/sound/soc/blackfin/bf6xx-i2s.c
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1/*
2 * bf6xx-i2s.c - Analog Devices BF6XX i2s interface driver
3 *
4 * Copyright (c) 2012 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#include <linux/device.h>
21#include <linux/init.h>
22#include <linux/module.h>
23#include <linux/platform_device.h>
24#include <sound/pcm.h>
25#include <sound/pcm_params.h>
26#include <sound/soc.h>
27#include <sound/soc-dai.h>
28
29#include "bf6xx-sport.h"
30
31struct sport_params param;
32
33static int bfin_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
34 unsigned int fmt)
35{
36 struct sport_device *sport = snd_soc_dai_get_drvdata(cpu_dai);
37 struct device *dev = &sport->pdev->dev;
38 int ret = 0;
39
40 param.spctl &= ~(SPORT_CTL_OPMODE | SPORT_CTL_CKRE | SPORT_CTL_FSR
41 | SPORT_CTL_LFS | SPORT_CTL_LAFS);
42 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
43 case SND_SOC_DAIFMT_I2S:
44 param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_CKRE
45 | SPORT_CTL_LFS;
46 break;
47 case SND_SOC_DAIFMT_DSP_A:
48 param.spctl |= SPORT_CTL_FSR;
49 break;
50 case SND_SOC_DAIFMT_LEFT_J:
51 param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_LFS
52 | SPORT_CTL_LAFS;
53 break;
54 default:
55 dev_err(dev, "%s: Unknown DAI format type\n", __func__);
56 ret = -EINVAL;
57 break;
58 }
59
60 param.spctl &= ~(SPORT_CTL_ICLK | SPORT_CTL_IFS);
61 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
62 case SND_SOC_DAIFMT_CBM_CFM:
63 break;
64 case SND_SOC_DAIFMT_CBS_CFS:
65 case SND_SOC_DAIFMT_CBM_CFS:
66 case SND_SOC_DAIFMT_CBS_CFM:
67 ret = -EINVAL;
68 break;
69 default:
70 dev_err(dev, "%s: Unknown DAI master type\n", __func__);
71 ret = -EINVAL;
72 break;
73 }
74
75 return ret;
76}
77
78static int bfin_i2s_hw_params(struct snd_pcm_substream *substream,
79 struct snd_pcm_hw_params *params,
80 struct snd_soc_dai *dai)
81{
82 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
83 struct device *dev = &sport->pdev->dev;
84 int ret = 0;
85
86 param.spctl &= ~SPORT_CTL_SLEN;
87 switch (params_format(params)) {
88 case SNDRV_PCM_FORMAT_S8:
89 param.spctl |= 0x70;
90 sport->wdsize = 1;
91 case SNDRV_PCM_FORMAT_S16_LE:
92 param.spctl |= 0xf0;
93 sport->wdsize = 2;
94 break;
95 case SNDRV_PCM_FORMAT_S24_LE:
96 param.spctl |= 0x170;
97 sport->wdsize = 3;
98 break;
99 case SNDRV_PCM_FORMAT_S32_LE:
100 param.spctl |= 0x1f0;
101 sport->wdsize = 4;
102 break;
103 }
104
105 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
106 ret = sport_set_tx_params(sport, &param);
107 if (ret) {
108 dev_err(dev, "SPORT tx is busy!\n");
109 return ret;
110 }
111 } else {
112 ret = sport_set_rx_params(sport, &param);
113 if (ret) {
114 dev_err(dev, "SPORT rx is busy!\n");
115 return ret;
116 }
117 }
118 return 0;
119}
120
121#ifdef CONFIG_PM
122static int bfin_i2s_suspend(struct snd_soc_dai *dai)
123{
124 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
125
126 if (dai->capture_active)
127 sport_rx_stop(sport);
128 if (dai->playback_active)
129 sport_tx_stop(sport);
130 return 0;
131}
132
133static int bfin_i2s_resume(struct snd_soc_dai *dai)
134{
135 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
136 struct device *dev = &sport->pdev->dev;
137 int ret;
138
139 ret = sport_set_tx_params(sport, &param);
140 if (ret) {
141 dev_err(dev, "SPORT tx is busy!\n");
142 return ret;
143 }
144 ret = sport_set_rx_params(sport, &param);
145 if (ret) {
146 dev_err(dev, "SPORT rx is busy!\n");
147 return ret;
148 }
149
150 return 0;
151}
152
153#else
154#define bfin_i2s_suspend NULL
155#define bfin_i2s_resume NULL
156#endif
157
158#define BFIN_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
159 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
160 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
161 SNDRV_PCM_RATE_96000)
162
163#define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
164 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
165
166static struct snd_soc_dai_ops bfin_i2s_dai_ops = {
167 .hw_params = bfin_i2s_hw_params,
168 .set_fmt = bfin_i2s_set_dai_fmt,
169};
170
171static struct snd_soc_dai_driver bfin_i2s_dai = {
172 .suspend = bfin_i2s_suspend,
173 .resume = bfin_i2s_resume,
174 .playback = {
175 .channels_min = 1,
176 .channels_max = 2,
177 .rates = BFIN_I2S_RATES,
178 .formats = BFIN_I2S_FORMATS,
179 },
180 .capture = {
181 .channels_min = 1,
182 .channels_max = 2,
183 .rates = BFIN_I2S_RATES,
184 .formats = BFIN_I2S_FORMATS,
185 },
186 .ops = &bfin_i2s_dai_ops,
187};
188
189static int __devinit bfin_i2s_probe(struct platform_device *pdev)
190{
191 struct sport_device *sport;
192 struct device *dev = &pdev->dev;
193 int ret;
194
195 sport = sport_create(pdev);
196 if (!sport)
197 return -ENODEV;
198
199 /* register with the ASoC layers */
200 ret = snd_soc_register_dai(dev, &bfin_i2s_dai);
201 if (ret) {
202 dev_err(dev, "Failed to register DAI: %d\n", ret);
203 sport_delete(sport);
204 return ret;
205 }
206 platform_set_drvdata(pdev, sport);
207
208 return 0;
209}
210
211static int __devexit bfin_i2s_remove(struct platform_device *pdev)
212{
213 struct sport_device *sport = platform_get_drvdata(pdev);
214
215 snd_soc_unregister_dai(&pdev->dev);
216 sport_delete(sport);
217
218 return 0;
219}
220
221static struct platform_driver bfin_i2s_driver = {
222 .probe = bfin_i2s_probe,
223 .remove = __devexit_p(bfin_i2s_remove),
224 .driver = {
225 .name = "bfin-i2s",
226 .owner = THIS_MODULE,
227 },
228};
229
230module_platform_driver(bfin_i2s_driver);
231
232MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver");
233MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
234MODULE_LICENSE("GPL v2");
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-13 19:29:51 -0500