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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 break;
92 case SNDRV_PCM_FORMAT_S16_LE:
93 param.spctl |= 0xf0;
94 sport->wdsize = 2;
95 break;
96 case SNDRV_PCM_FORMAT_S24_LE:
97 param.spctl |= 0x170;
98 sport->wdsize = 3;
99 break;
100 case SNDRV_PCM_FORMAT_S32_LE:
101 param.spctl |= 0x1f0;
102 sport->wdsize = 4;
103 break;
104 }
105
106 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
107 ret = sport_set_tx_params(sport, ¶m);
108 if (ret) {
109 dev_err(dev, "SPORT tx is busy!\n");
110 return ret;
111 }
112 } else {
113 ret = sport_set_rx_params(sport, ¶m);
114 if (ret) {
115 dev_err(dev, "SPORT rx is busy!\n");
116 return ret;
117 }
118 }
119 return 0;
120}
121
122#ifdef CONFIG_PM
123static int bfin_i2s_suspend(struct snd_soc_dai *dai)
124{
125 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
126
127 if (dai->capture_active)
128 sport_rx_stop(sport);
129 if (dai->playback_active)
130 sport_tx_stop(sport);
131 return 0;
132}
133
134static int bfin_i2s_resume(struct snd_soc_dai *dai)
135{
136 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
137 struct device *dev = &sport->pdev->dev;
138 int ret;
139
140 ret = sport_set_tx_params(sport, ¶m);
141 if (ret) {
142 dev_err(dev, "SPORT tx is busy!\n");
143 return ret;
144 }
145 ret = sport_set_rx_params(sport, ¶m);
146 if (ret) {
147 dev_err(dev, "SPORT rx is busy!\n");
148 return ret;
149 }
150
151 return 0;
152}
153
154#else
155#define bfin_i2s_suspend NULL
156#define bfin_i2s_resume NULL
157#endif
158
159#define BFIN_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
160 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
161 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
162 SNDRV_PCM_RATE_96000)
163
164#define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
165 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
166
167static struct snd_soc_dai_ops bfin_i2s_dai_ops = {
168 .hw_params = bfin_i2s_hw_params,
169 .set_fmt = bfin_i2s_set_dai_fmt,
170};
171
172static struct snd_soc_dai_driver bfin_i2s_dai = {
173 .suspend = bfin_i2s_suspend,
174 .resume = bfin_i2s_resume,
175 .playback = {
176 .channels_min = 1,
177 .channels_max = 2,
178 .rates = BFIN_I2S_RATES,
179 .formats = BFIN_I2S_FORMATS,
180 },
181 .capture = {
182 .channels_min = 1,
183 .channels_max = 2,
184 .rates = BFIN_I2S_RATES,
185 .formats = BFIN_I2S_FORMATS,
186 },
187 .ops = &bfin_i2s_dai_ops,
188};
189
190static const struct snd_soc_component_driver bfin_i2s_component = {
191 .name = "bfin-i2s",
192};
193
194static int bfin_i2s_probe(struct platform_device *pdev)
195{
196 struct sport_device *sport;
197 struct device *dev = &pdev->dev;
198 int ret;
199
200 sport = sport_create(pdev);
201 if (!sport)
202 return -ENODEV;
203
204
205 ret = snd_soc_register_component(dev, &bfin_i2s_component,
206 &bfin_i2s_dai, 1);
207 if (ret) {
208 dev_err(dev, "Failed to register DAI: %d\n", ret);
209 sport_delete(sport);
210 return ret;
211 }
212 platform_set_drvdata(pdev, sport);
213
214 return 0;
215}
216
217static int bfin_i2s_remove(struct platform_device *pdev)
218{
219 struct sport_device *sport = platform_get_drvdata(pdev);
220
221 snd_soc_unregister_component(&pdev->dev);
222 sport_delete(sport);
223
224 return 0;
225}
226
227static struct platform_driver bfin_i2s_driver = {
228 .probe = bfin_i2s_probe,
229 .remove = bfin_i2s_remove,
230 .driver = {
231 .name = "bfin-i2s",
232 },
233};
234
235module_platform_driver(bfin_i2s_driver);
236
237MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver");
238MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
239MODULE_LICENSE("GPL v2");
240
