This source file includes following definitions.
- psc_i2s_hw_params
- psc_i2s_set_sysclk
- psc_i2s_set_fmt
- psc_i2s_of_probe
- psc_i2s_of_remove
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9 #include <linux/module.h>
10 #include <linux/of_device.h>
11 #include <linux/of_platform.h>
12
13 #include <sound/pcm.h>
14 #include <sound/pcm_params.h>
15 #include <sound/soc.h>
16
17 #include <asm/mpc52xx_psc.h>
18
19 #include "mpc5200_dma.h"
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28
29 #define PSC_I2S_RATES SNDRV_PCM_RATE_CONTINUOUS
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33
34 #define PSC_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
35 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
36
37 static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
38 struct snd_pcm_hw_params *params,
39 struct snd_soc_dai *dai)
40 {
41 struct snd_soc_pcm_runtime *rtd = substream->private_data;
42 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai);
43 u32 mode;
44
45 dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
46 " periods=%i buffer_size=%i buffer_bytes=%i\n",
47 __func__, substream, params_period_size(params),
48 params_period_bytes(params), params_periods(params),
49 params_buffer_size(params), params_buffer_bytes(params));
50
51 switch (params_format(params)) {
52 case SNDRV_PCM_FORMAT_S8:
53 mode = MPC52xx_PSC_SICR_SIM_CODEC_8;
54 break;
55 case SNDRV_PCM_FORMAT_S16_BE:
56 mode = MPC52xx_PSC_SICR_SIM_CODEC_16;
57 break;
58 case SNDRV_PCM_FORMAT_S24_BE:
59 mode = MPC52xx_PSC_SICR_SIM_CODEC_24;
60 break;
61 case SNDRV_PCM_FORMAT_S32_BE:
62 mode = MPC52xx_PSC_SICR_SIM_CODEC_32;
63 break;
64 default:
65 dev_dbg(psc_dma->dev, "invalid format\n");
66 return -EINVAL;
67 }
68 out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | mode);
69
70 return 0;
71 }
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87 static int psc_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
88 int clk_id, unsigned int freq, int dir)
89 {
90 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
91 dev_dbg(psc_dma->dev, "psc_i2s_set_sysclk(cpu_dai=%p, dir=%i)\n",
92 cpu_dai, dir);
93 return (dir == SND_SOC_CLOCK_IN) ? 0 : -EINVAL;
94 }
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107 static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
108 {
109 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
110 dev_dbg(psc_dma->dev, "psc_i2s_set_fmt(cpu_dai=%p, format=%i)\n",
111 cpu_dai, format);
112 return (format == SND_SOC_DAIFMT_I2S) ? 0 : -EINVAL;
113 }
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125 static const struct snd_soc_dai_ops psc_i2s_dai_ops = {
126 .hw_params = psc_i2s_hw_params,
127 .set_sysclk = psc_i2s_set_sysclk,
128 .set_fmt = psc_i2s_set_fmt,
129 };
130
131 static struct snd_soc_dai_driver psc_i2s_dai[] = {{
132 .name = "mpc5200-psc-i2s.0",
133 .playback = {
134 .stream_name = "I2S Playback",
135 .channels_min = 2,
136 .channels_max = 2,
137 .rates = PSC_I2S_RATES,
138 .formats = PSC_I2S_FORMATS,
139 },
140 .capture = {
141 .stream_name = "I2S Capture",
142 .channels_min = 2,
143 .channels_max = 2,
144 .rates = PSC_I2S_RATES,
145 .formats = PSC_I2S_FORMATS,
146 },
147 .ops = &psc_i2s_dai_ops,
148 } };
149
150 static const struct snd_soc_component_driver psc_i2s_component = {
151 .name = "mpc5200-i2s",
152 };
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158
159 static int psc_i2s_of_probe(struct platform_device *op)
160 {
161 int rc;
162 struct psc_dma *psc_dma;
163 struct mpc52xx_psc __iomem *regs;
164
165 rc = mpc5200_audio_dma_create(op);
166 if (rc != 0)
167 return rc;
168
169 rc = snd_soc_register_component(&op->dev, &psc_i2s_component,
170 psc_i2s_dai, ARRAY_SIZE(psc_i2s_dai));
171 if (rc != 0) {
172 pr_err("Failed to register DAI\n");
173 return rc;
174 }
175
176 psc_dma = dev_get_drvdata(&op->dev);
177 regs = psc_dma->psc_regs;
178
179
180 psc_dma->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S |
181 MPC52xx_PSC_SICR_CLKPOL;
182 out_be32(&psc_dma->psc_regs->sicr,
183 psc_dma->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
184
185
186
187 if (!of_get_property(op->dev.of_node, "codec-handle", NULL))
188 return 0;
189
190
191
192
193
194
195 while ((in_8(®s->ipcr_acr.ipcr) & 0x80) != 0)
196 ;
197
198 while ((in_8(®s->ipcr_acr.ipcr) & 0x80) == 0)
199 ;
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205 out_8(&psc_dma->psc_regs->command,
206 MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
207
208 return 0;
209
210 }
211
212 static int psc_i2s_of_remove(struct platform_device *op)
213 {
214 mpc5200_audio_dma_destroy(op);
215 snd_soc_unregister_component(&op->dev);
216 return 0;
217 }
218
219
220 static const struct of_device_id psc_i2s_match[] = {
221 { .compatible = "fsl,mpc5200-psc-i2s", },
222 { .compatible = "fsl,mpc5200b-psc-i2s", },
223 {}
224 };
225 MODULE_DEVICE_TABLE(of, psc_i2s_match);
226
227 static struct platform_driver psc_i2s_driver = {
228 .probe = psc_i2s_of_probe,
229 .remove = psc_i2s_of_remove,
230 .driver = {
231 .name = "mpc5200-psc-i2s",
232 .of_match_table = psc_i2s_match,
233 },
234 };
235
236 module_platform_driver(psc_i2s_driver);
237
238 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
239 MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
240 MODULE_LICENSE("GPL");
241