2 * bf6xx-i2s.c - Analog Devices BF6XX i2s interface driver
4 * Copyright (c) 2012 Analog Devices Inc.
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.
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.
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.
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>
29 #include "bf6xx-sport.h"
31 struct sport_params param;
33 static int bfin_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
36 struct sport_device *sport = snd_soc_dai_get_drvdata(cpu_dai);
37 struct device *dev = &sport->pdev->dev;
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
47 case SND_SOC_DAIFMT_DSP_A:
48 param.spctl |= SPORT_CTL_FSR;
50 case SND_SOC_DAIFMT_LEFT_J:
51 param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_LFS
55 dev_err(dev, "%s: Unknown DAI format type\n", __func__);
60 param.spctl &= ~(SPORT_CTL_ICLK | SPORT_CTL_IFS);
61 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
62 case SND_SOC_DAIFMT_CBM_CFM:
64 case SND_SOC_DAIFMT_CBS_CFS:
65 case SND_SOC_DAIFMT_CBM_CFS:
66 case SND_SOC_DAIFMT_CBS_CFM:
70 dev_err(dev, "%s: Unknown DAI master type\n", __func__);
78 static int bfin_i2s_hw_params(struct snd_pcm_substream *substream,
79 struct snd_pcm_hw_params *params,
80 struct snd_soc_dai *dai)
82 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
83 struct device *dev = &sport->pdev->dev;
86 param.spctl &= ~SPORT_CTL_SLEN;
87 switch (params_format(params)) {
88 case SNDRV_PCM_FORMAT_S8:
91 case SNDRV_PCM_FORMAT_S16_LE:
95 case SNDRV_PCM_FORMAT_S24_LE:
99 case SNDRV_PCM_FORMAT_S32_LE:
100 param.spctl |= 0x1f0;
105 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
106 ret = sport_set_tx_params(sport, ¶m);
108 dev_err(dev, "SPORT tx is busy!\n");
112 ret = sport_set_rx_params(sport, ¶m);
114 dev_err(dev, "SPORT rx is busy!\n");
122 static int bfin_i2s_suspend(struct snd_soc_dai *dai)
124 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
126 if (dai->capture_active)
127 sport_rx_stop(sport);
128 if (dai->playback_active)
129 sport_tx_stop(sport);
133 static int bfin_i2s_resume(struct snd_soc_dai *dai)
135 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
136 struct device *dev = &sport->pdev->dev;
139 ret = sport_set_tx_params(sport, ¶m);
141 dev_err(dev, "SPORT tx is busy!\n");
144 ret = sport_set_rx_params(sport, ¶m);
146 dev_err(dev, "SPORT rx is busy!\n");
154 #define bfin_i2s_suspend NULL
155 #define bfin_i2s_resume NULL
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)
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)
166 static struct snd_soc_dai_ops bfin_i2s_dai_ops = {
167 .hw_params = bfin_i2s_hw_params,
168 .set_fmt = bfin_i2s_set_dai_fmt,
171 static struct snd_soc_dai_driver bfin_i2s_dai = {
172 .suspend = bfin_i2s_suspend,
173 .resume = bfin_i2s_resume,
177 .rates = BFIN_I2S_RATES,
178 .formats = BFIN_I2S_FORMATS,
183 .rates = BFIN_I2S_RATES,
184 .formats = BFIN_I2S_FORMATS,
186 .ops = &bfin_i2s_dai_ops,
189 static const struct snd_soc_component_driver bfin_i2s_component = {
193 static int bfin_i2s_probe(struct platform_device *pdev)
195 struct sport_device *sport;
196 struct device *dev = &pdev->dev;
199 sport = sport_create(pdev);
203 /* register with the ASoC layers */
204 ret = snd_soc_register_component(dev, &bfin_i2s_component,
207 dev_err(dev, "Failed to register DAI: %d\n", ret);
211 platform_set_drvdata(pdev, sport);
216 static int bfin_i2s_remove(struct platform_device *pdev)
218 struct sport_device *sport = platform_get_drvdata(pdev);
220 snd_soc_unregister_component(&pdev->dev);
226 static struct platform_driver bfin_i2s_driver = {
227 .probe = bfin_i2s_probe,
228 .remove = bfin_i2s_remove,
231 .owner = THIS_MODULE,
235 module_platform_driver(bfin_i2s_driver);
237 MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver");
238 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
239 MODULE_LICENSE("GPL v2");