1 /*
2 * File: sound/soc/blackfin/bf5xx-i2s.c
3 * Author: Cliff Cai <Cliff.Cai@analog.com>
4 *
5 * Created: Tue June 06 2008
6 * Description: Blackfin I2S CPU DAI driver
7 *
8 * Modified:
9 * Copyright 2008 Analog Devices Inc.
10 *
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 */
28
29 #include <linux/init.h>
30 #include <linux/module.h>
31 #include <linux/device.h>
32 #include <linux/delay.h>
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/initval.h>
37 #include <sound/soc.h>
38
39 #include <asm/irq.h>
40 #include <asm/portmux.h>
41 #include <linux/mutex.h>
42 #include <linux/gpio.h>
43
44 #include "bf5xx-sport.h"
45
46 struct bf5xx_i2s_port {
47 u16 tcr1;
48 u16 rcr1;
49 u16 tcr2;
50 u16 rcr2;
51 int configured;
52 };
53
bf5xx_i2s_set_dai_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)54 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
55 unsigned int fmt)
56 {
57 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
58 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
59 int ret = 0;
60
61 /* interface format:support I2S,slave mode */
62 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
63 case SND_SOC_DAIFMT_I2S:
64 bf5xx_i2s->tcr1 |= TFSR | TCKFE;
65 bf5xx_i2s->rcr1 |= RFSR | RCKFE;
66 bf5xx_i2s->tcr2 |= TSFSE;
67 bf5xx_i2s->rcr2 |= RSFSE;
68 break;
69 case SND_SOC_DAIFMT_DSP_A:
70 bf5xx_i2s->tcr1 |= TFSR;
71 bf5xx_i2s->rcr1 |= RFSR;
72 break;
73 case SND_SOC_DAIFMT_LEFT_J:
74 ret = -EINVAL;
75 break;
76 default:
77 printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
78 ret = -EINVAL;
79 break;
80 }
81
82 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
83 case SND_SOC_DAIFMT_CBM_CFM:
84 break;
85 case SND_SOC_DAIFMT_CBS_CFS:
86 case SND_SOC_DAIFMT_CBM_CFS:
87 case SND_SOC_DAIFMT_CBS_CFM:
88 ret = -EINVAL;
89 break;
90 default:
91 printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
92 ret = -EINVAL;
93 break;
94 }
95
96 return ret;
97 }
98
bf5xx_i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)99 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
100 struct snd_pcm_hw_params *params,
101 struct snd_soc_dai *dai)
102 {
103 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
104 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
105 int ret = 0;
106
107 bf5xx_i2s->tcr2 &= ~0x1f;
108 bf5xx_i2s->rcr2 &= ~0x1f;
109 switch (params_format(params)) {
110 case SNDRV_PCM_FORMAT_S8:
111 bf5xx_i2s->tcr2 |= 7;
112 bf5xx_i2s->rcr2 |= 7;
113 sport_handle->wdsize = 1;
114 case SNDRV_PCM_FORMAT_S16_LE:
115 bf5xx_i2s->tcr2 |= 15;
116 bf5xx_i2s->rcr2 |= 15;
117 sport_handle->wdsize = 2;
118 break;
119 case SNDRV_PCM_FORMAT_S24_LE:
120 bf5xx_i2s->tcr2 |= 23;
121 bf5xx_i2s->rcr2 |= 23;
122 sport_handle->wdsize = 3;
123 break;
124 case SNDRV_PCM_FORMAT_S32_LE:
125 bf5xx_i2s->tcr2 |= 31;
126 bf5xx_i2s->rcr2 |= 31;
127 sport_handle->wdsize = 4;
128 break;
129 }
130
131 if (!bf5xx_i2s->configured) {
132 /*
133 * TX and RX are not independent,they are enabled at the
134 * same time, even if only one side is running. So, we
135 * need to configure both of them at the time when the first
136 * stream is opened.
137 *
138 * CPU DAI:slave mode.
139 */
140 bf5xx_i2s->configured = 1;
141 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
142 bf5xx_i2s->rcr2, 0, 0);
143 if (ret) {
144 pr_err("SPORT is busy!\n");
145 return -EBUSY;
146 }
147
148 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
149 bf5xx_i2s->tcr2, 0, 0);
150 if (ret) {
151 pr_err("SPORT is busy!\n");
152 return -EBUSY;
153 }
154 }
155
156 return 0;
157 }
158
bf5xx_i2s_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)159 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
160 struct snd_soc_dai *dai)
161 {
162 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
163 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
164
165 pr_debug("%s enter\n", __func__);
166 /* No active stream, SPORT is allowed to be configured again. */
167 if (!dai->active)
168 bf5xx_i2s->configured = 0;
169 }
170
171 #ifdef CONFIG_PM
bf5xx_i2s_suspend(struct snd_soc_dai * dai)172 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
173 {
174 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
175
176 pr_debug("%s : sport %d\n", __func__, dai->id);
177
178 if (dai->capture_active)
179 sport_rx_stop(sport_handle);
180 if (dai->playback_active)
181 sport_tx_stop(sport_handle);
182 return 0;
183 }
184
bf5xx_i2s_resume(struct snd_soc_dai * dai)185 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
186 {
187 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
188 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
189 int ret;
190
191 pr_debug("%s : sport %d\n", __func__, dai->id);
192
193 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
194 bf5xx_i2s->rcr2, 0, 0);
195 if (ret) {
196 pr_err("SPORT is busy!\n");
197 return -EBUSY;
198 }
199
200 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
201 bf5xx_i2s->tcr2, 0, 0);
202 if (ret) {
203 pr_err("SPORT is busy!\n");
204 return -EBUSY;
205 }
206
207 return 0;
208 }
209
210 #else
211 #define bf5xx_i2s_suspend NULL
212 #define bf5xx_i2s_resume NULL
213 #endif
214
215 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
216 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
217 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
218 SNDRV_PCM_RATE_96000)
219
220 #define BF5XX_I2S_FORMATS \
221 (SNDRV_PCM_FMTBIT_S8 | \
222 SNDRV_PCM_FMTBIT_S16_LE | \
223 SNDRV_PCM_FMTBIT_S24_LE | \
224 SNDRV_PCM_FMTBIT_S32_LE)
225
226 static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
227 .shutdown = bf5xx_i2s_shutdown,
228 .hw_params = bf5xx_i2s_hw_params,
229 .set_fmt = bf5xx_i2s_set_dai_fmt,
230 };
231
232 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
233 .suspend = bf5xx_i2s_suspend,
234 .resume = bf5xx_i2s_resume,
235 .playback = {
236 .channels_min = 1,
237 .channels_max = 2,
238 .rates = BF5XX_I2S_RATES,
239 .formats = BF5XX_I2S_FORMATS,},
240 .capture = {
241 .channels_min = 1,
242 .channels_max = 2,
243 .rates = BF5XX_I2S_RATES,
244 .formats = BF5XX_I2S_FORMATS,},
245 .ops = &bf5xx_i2s_dai_ops,
246 };
247
bf5xx_i2s_probe(struct platform_device * pdev)248 static int __devinit bf5xx_i2s_probe(struct platform_device *pdev)
249 {
250 struct sport_device *sport_handle;
251 int ret;
252
253 /* configure SPORT for I2S */
254 sport_handle = sport_init(pdev, 4, 2 * sizeof(u32),
255 sizeof(struct bf5xx_i2s_port));
256 if (!sport_handle)
257 return -ENODEV;
258
259 /* register with the ASoC layers */
260 ret = snd_soc_register_dai(&pdev->dev, &bf5xx_i2s_dai);
261 if (ret) {
262 pr_err("Failed to register DAI: %d\n", ret);
263 sport_done(sport_handle);
264 return ret;
265 }
266
267 return 0;
268 }
269
bf5xx_i2s_remove(struct platform_device * pdev)270 static int __devexit bf5xx_i2s_remove(struct platform_device *pdev)
271 {
272 struct sport_device *sport_handle = platform_get_drvdata(pdev);
273
274 pr_debug("%s enter\n", __func__);
275
276 snd_soc_unregister_dai(&pdev->dev);
277 sport_done(sport_handle);
278
279 return 0;
280 }
281
282 static struct platform_driver bfin_i2s_driver = {
283 .probe = bf5xx_i2s_probe,
284 .remove = __devexit_p(bf5xx_i2s_remove),
285 .driver = {
286 .name = "bfin-i2s",
287 .owner = THIS_MODULE,
288 },
289 };
290
291 module_platform_driver(bfin_i2s_driver);
292
293 /* Module information */
294 MODULE_AUTHOR("Cliff Cai");
295 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
296 MODULE_LICENSE("GPL");
297
298