2 * File: sound/soc/blackfin/bf5xx-i2s.c
3 * Author: Cliff Cai <Cliff.Cai@analog.com>
5 * Created: Tue June 06 2008
6 * Description: Blackfin I2S CPU DAI driver
9 * Copyright 2008 Analog Devices Inc.
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
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.
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.
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
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>
40 #include <asm/portmux.h>
41 #include <linux/mutex.h>
42 #include <linux/gpio.h>
44 #include "bf5xx-sport.h"
46 struct bf5xx_i2s_port {
54 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
57 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
58 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
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;
69 case SND_SOC_DAIFMT_DSP_A:
70 bf5xx_i2s->tcr1 |= TFSR;
71 bf5xx_i2s->rcr1 |= RFSR;
73 case SND_SOC_DAIFMT_LEFT_J:
77 printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
82 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
83 case SND_SOC_DAIFMT_CBM_CFM:
85 case SND_SOC_DAIFMT_CBS_CFS:
86 case SND_SOC_DAIFMT_CBM_CFS:
87 case SND_SOC_DAIFMT_CBS_CFM:
91 printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
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)
103 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
104 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
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;
119 case SNDRV_PCM_FORMAT_S24_LE:
120 bf5xx_i2s->tcr2 |= 23;
121 bf5xx_i2s->rcr2 |= 23;
122 sport_handle->wdsize = 3;
124 case SNDRV_PCM_FORMAT_S32_LE:
125 bf5xx_i2s->tcr2 |= 31;
126 bf5xx_i2s->rcr2 |= 31;
127 sport_handle->wdsize = 4;
131 if (!bf5xx_i2s->configured) {
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
138 * CPU DAI:slave mode.
140 bf5xx_i2s->configured = 1;
141 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
142 bf5xx_i2s->rcr2, 0, 0);
144 pr_err("SPORT is busy!\n");
148 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
149 bf5xx_i2s->tcr2, 0, 0);
151 pr_err("SPORT is busy!\n");
159 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
160 struct snd_soc_dai *dai)
162 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
163 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
165 pr_debug("%s enter\n", __func__);
166 /* No active stream, SPORT is allowed to be configured again. */
168 bf5xx_i2s->configured = 0;
172 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
174 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
176 pr_debug("%s : sport %d\n", __func__, dai->id);
178 if (dai->capture_active)
179 sport_rx_stop(sport_handle);
180 if (dai->playback_active)
181 sport_tx_stop(sport_handle);
185 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
187 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
188 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
191 pr_debug("%s : sport %d\n", __func__, dai->id);
193 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
194 bf5xx_i2s->rcr2, 0, 0);
196 pr_err("SPORT is busy!\n");
200 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
201 bf5xx_i2s->tcr2, 0, 0);
203 pr_err("SPORT is busy!\n");
211 #define bf5xx_i2s_suspend NULL
212 #define bf5xx_i2s_resume NULL
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)
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)
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,
232 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
233 .suspend = bf5xx_i2s_suspend,
234 .resume = bf5xx_i2s_resume,
238 .rates = BF5XX_I2S_RATES,
239 .formats = BF5XX_I2S_FORMATS,},
243 .rates = BF5XX_I2S_RATES,
244 .formats = BF5XX_I2S_FORMATS,},
245 .ops = &bf5xx_i2s_dai_ops,
248 static const struct snd_soc_component_driver bf5xx_i2s_component = {
252 static int bf5xx_i2s_probe(struct platform_device *pdev)
254 struct sport_device *sport_handle;
257 /* configure SPORT for I2S */
258 sport_handle = sport_init(pdev, 4, 2 * sizeof(u32),
259 sizeof(struct bf5xx_i2s_port));
263 /* register with the ASoC layers */
264 ret = snd_soc_register_component(&pdev->dev, &bf5xx_i2s_component,
267 pr_err("Failed to register DAI: %d\n", ret);
268 sport_done(sport_handle);
275 static int bf5xx_i2s_remove(struct platform_device *pdev)
277 struct sport_device *sport_handle = platform_get_drvdata(pdev);
279 pr_debug("%s enter\n", __func__);
281 snd_soc_unregister_component(&pdev->dev);
282 sport_done(sport_handle);
287 static struct platform_driver bfin_i2s_driver = {
288 .probe = bf5xx_i2s_probe,
289 .remove = bf5xx_i2s_remove,
292 .owner = THIS_MODULE,
296 module_platform_driver(bfin_i2s_driver);
298 /* Module information */
299 MODULE_AUTHOR("Cliff Cai");
300 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
301 MODULE_LICENSE("GPL");