ASoC: Switch FSL SSI DAI over to symmetric_rates
[linux-2.6] / sound / soc / fsl / mpc5200_psc_ac97.c
1 /*
2  * linux/sound/mpc5200-ac97.c -- AC97 support for the Freescale MPC52xx chip.
3  *
4  * Copyright (C) 2009 Jon Smirl, Digispeaker
5  * Author: Jon Smirl <jonsmirl@gmail.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12 #include <linux/module.h>
13 #include <linux/of_device.h>
14 #include <linux/of_platform.h>
15
16 #include <sound/pcm.h>
17 #include <sound/pcm_params.h>
18 #include <sound/soc.h>
19
20 #include <asm/time.h>
21 #include <asm/delay.h>
22 #include <asm/mpc52xx_psc.h>
23
24 #include "mpc5200_dma.h"
25 #include "mpc5200_psc_ac97.h"
26
27 #define DRV_NAME "mpc5200-psc-ac97"
28
29 /* ALSA only supports a single AC97 device so static is recommend here */
30 static struct psc_dma *psc_dma;
31
32 static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
33 {
34         int rc;
35         unsigned int val;
36
37         /* Wait for command send status zero = ready */
38         spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
39                                 MPC52xx_PSC_SR_CMDSEND), 100, 0, rc);
40         if (rc == 0) {
41                 pr_err("timeout on ac97 bus (rdy)\n");
42                 return -ENODEV;
43         }
44         /* Send the read */
45         out_be32(&psc_dma->psc_regs->ac97_cmd, (1<<31) | ((reg & 0x7f) << 24));
46
47         /* Wait for the answer */
48         spin_event_timeout((in_be16(&psc_dma->psc_regs->sr_csr.status) &
49                                 MPC52xx_PSC_SR_DATA_VAL), 100, 0, rc);
50         if (rc == 0) {
51                 pr_err("timeout on ac97 read (val) %x\n",
52                                 in_be16(&psc_dma->psc_regs->sr_csr.status));
53                 return -ENODEV;
54         }
55         /* Get the data */
56         val = in_be32(&psc_dma->psc_regs->ac97_data);
57         if (((val >> 24) & 0x7f) != reg) {
58                 pr_err("reg echo error on ac97 read\n");
59                 return -ENODEV;
60         }
61         val = (val >> 8) & 0xffff;
62
63         return (unsigned short) val;
64 }
65
66 static void psc_ac97_write(struct snd_ac97 *ac97,
67                                 unsigned short reg, unsigned short val)
68 {
69         int rc;
70
71         /* Wait for command status zero = ready */
72         spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
73                                 MPC52xx_PSC_SR_CMDSEND), 100, 0, rc);
74         if (rc == 0) {
75                 pr_err("timeout on ac97 bus (write)\n");
76                 return;
77         }
78         /* Write data */
79         out_be32(&psc_dma->psc_regs->ac97_cmd,
80                         ((reg & 0x7f) << 24) | (val << 8));
81 }
82
83 static void psc_ac97_warm_reset(struct snd_ac97 *ac97)
84 {
85         int rc;
86         struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
87
88         out_be32(&regs->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_AWR);
89         spin_event_timeout(0, 3, 0, rc);
90         out_be32(&regs->sicr, psc_dma->sicr);
91 }
92
93 static void psc_ac97_cold_reset(struct snd_ac97 *ac97)
94 {
95         int rc;
96         struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
97
98         /* Do a cold reset */
99         out_8(&regs->op1, MPC52xx_PSC_OP_RES);
100         spin_event_timeout(0, 10, 0, rc);
101         out_8(&regs->op0, MPC52xx_PSC_OP_RES);
102         spin_event_timeout(0, 50, 0, rc);
103         psc_ac97_warm_reset(ac97);
104 }
105
106 struct snd_ac97_bus_ops soc_ac97_ops = {
107         .read           = psc_ac97_read,
108         .write          = psc_ac97_write,
109         .reset          = psc_ac97_cold_reset,
110         .warm_reset     = psc_ac97_warm_reset,
111 };
112 EXPORT_SYMBOL_GPL(soc_ac97_ops);
113
114 static int psc_ac97_hw_analog_params(struct snd_pcm_substream *substream,
115                                  struct snd_pcm_hw_params *params,
116                                  struct snd_soc_dai *cpu_dai)
117 {
118         struct psc_dma *psc_dma = cpu_dai->private_data;
119
120         dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
121                 " periods=%i buffer_size=%i  buffer_bytes=%i channels=%i"
122                 " rate=%i format=%i\n",
123                 __func__, substream, params_period_size(params),
124                 params_period_bytes(params), params_periods(params),
125                 params_buffer_size(params), params_buffer_bytes(params),
126                 params_channels(params), params_rate(params),
127                 params_format(params));
128
129
130         if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
131                 if (params_channels(params) == 1)
132                         psc_dma->slots |= 0x00000100;
133                 else
134                         psc_dma->slots |= 0x00000300;
135         } else {
136                 if (params_channels(params) == 1)
137                         psc_dma->slots |= 0x01000000;
138                 else
139                         psc_dma->slots |= 0x03000000;
140         }
141         out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
142
143         return 0;
144 }
145
146 static int psc_ac97_hw_digital_params(struct snd_pcm_substream *substream,
147                                  struct snd_pcm_hw_params *params,
148                                  struct snd_soc_dai *cpu_dai)
149 {
150         struct psc_dma *psc_dma = cpu_dai->private_data;
151
152         if (params_channels(params) == 1)
153                 out_be32(&psc_dma->psc_regs->ac97_slots, 0x01000000);
154         else
155                 out_be32(&psc_dma->psc_regs->ac97_slots, 0x03000000);
156
157         return 0;
158 }
159
160 static int psc_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
161                                                         struct snd_soc_dai *dai)
162 {
163         struct snd_soc_pcm_runtime *rtd = substream->private_data;
164         struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
165
166         switch (cmd) {
167         case SNDRV_PCM_TRIGGER_STOP:
168                 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
169                         psc_dma->slots &= 0xFFFF0000;
170                 else
171                         psc_dma->slots &= 0x0000FFFF;
172
173                 out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
174                 break;
175         }
176         return 0;
177 }
178
179 static int psc_ac97_probe(struct platform_device *pdev,
180                                         struct snd_soc_dai *cpu_dai)
181 {
182         struct psc_dma *psc_dma = cpu_dai->private_data;
183         struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
184
185         /* Go */
186         out_8(&regs->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
187         return 0;
188 }
189
190 /* ---------------------------------------------------------------------
191  * ALSA SoC Bindings
192  *
193  * - Digital Audio Interface (DAI) template
194  * - create/destroy dai hooks
195  */
196
197 /**
198  * psc_ac97_dai_template: template CPU Digital Audio Interface
199  */
200 static struct snd_soc_dai_ops psc_ac97_analog_ops = {
201         .hw_params      = psc_ac97_hw_analog_params,
202         .trigger        = psc_ac97_trigger,
203 };
204
205 static struct snd_soc_dai_ops psc_ac97_digital_ops = {
206         .hw_params      = psc_ac97_hw_digital_params,
207 };
208
209 struct snd_soc_dai psc_ac97_dai[] = {
210 {
211         .name   = "AC97",
212         .ac97_control = 1,
213         .probe  = psc_ac97_probe,
214         .playback = {
215                 .channels_min   = 1,
216                 .channels_max   = 6,
217                 .rates          = SNDRV_PCM_RATE_8000_48000,
218                 .formats = SNDRV_PCM_FMTBIT_S32_BE,
219         },
220         .capture = {
221                 .channels_min   = 1,
222                 .channels_max   = 2,
223                 .rates          = SNDRV_PCM_RATE_8000_48000,
224                 .formats = SNDRV_PCM_FMTBIT_S32_BE,
225         },
226         .ops = &psc_ac97_analog_ops,
227 },
228 {
229         .name   = "SPDIF",
230         .ac97_control = 1,
231         .playback = {
232                 .channels_min   = 1,
233                 .channels_max   = 2,
234                 .rates          = SNDRV_PCM_RATE_32000 | \
235                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
236                 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
237         },
238         .ops = &psc_ac97_digital_ops,
239 } };
240 EXPORT_SYMBOL_GPL(psc_ac97_dai);
241
242
243
244 /* ---------------------------------------------------------------------
245  * OF platform bus binding code:
246  * - Probe/remove operations
247  * - OF device match table
248  */
249 static int __devinit psc_ac97_of_probe(struct of_device *op,
250                                       const struct of_device_id *match)
251 {
252         int rc, i;
253         struct snd_ac97 ac97;
254         struct mpc52xx_psc __iomem *regs;
255
256         rc = mpc5200_audio_dma_create(op);
257         if (rc != 0)
258                 return rc;
259
260         for (i = 0; i < ARRAY_SIZE(psc_ac97_dai); i++)
261                 psc_ac97_dai[i].dev = &op->dev;
262
263         rc = snd_soc_register_dais(psc_ac97_dai, ARRAY_SIZE(psc_ac97_dai));
264         if (rc != 0) {
265                 dev_err(&op->dev, "Failed to register DAI\n");
266                 return rc;
267         }
268
269         psc_dma = dev_get_drvdata(&op->dev);
270         regs = psc_dma->psc_regs;
271         ac97.private_data = psc_dma;
272
273         for (i = 0; i < ARRAY_SIZE(psc_ac97_dai); i++)
274                 psc_ac97_dai[i].private_data = psc_dma;
275
276         psc_dma->imr = 0;
277         out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr);
278
279         /* Configure the serial interface mode to AC97 */
280         psc_dma->sicr = MPC52xx_PSC_SICR_SIM_AC97 | MPC52xx_PSC_SICR_ENAC97;
281         out_be32(&regs->sicr, psc_dma->sicr);
282
283         /* No slots active */
284         out_be32(&regs->ac97_slots, 0x00000000);
285
286         return 0;
287 }
288
289 static int __devexit psc_ac97_of_remove(struct of_device *op)
290 {
291         return mpc5200_audio_dma_destroy(op);
292 }
293
294 /* Match table for of_platform binding */
295 static struct of_device_id psc_ac97_match[] __devinitdata = {
296         { .compatible = "fsl,mpc5200-psc-ac97", },
297         { .compatible = "fsl,mpc5200b-psc-ac97", },
298         {}
299 };
300 MODULE_DEVICE_TABLE(of, psc_ac97_match);
301
302 static struct of_platform_driver psc_ac97_driver = {
303         .match_table = psc_ac97_match,
304         .probe = psc_ac97_of_probe,
305         .remove = __devexit_p(psc_ac97_of_remove),
306         .driver = {
307                 .name = "mpc5200-psc-ac97",
308                 .owner = THIS_MODULE,
309         },
310 };
311
312 /* ---------------------------------------------------------------------
313  * Module setup and teardown; simply register the of_platform driver
314  * for the PSC in AC97 mode.
315  */
316 static int __init psc_ac97_init(void)
317 {
318         return of_register_platform_driver(&psc_ac97_driver);
319 }
320 module_init(psc_ac97_init);
321
322 static void __exit psc_ac97_exit(void)
323 {
324         of_unregister_platform_driver(&psc_ac97_driver);
325 }
326 module_exit(psc_ac97_exit);
327
328 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
329 MODULE_DESCRIPTION("mpc5200 AC97 module");
330 MODULE_LICENSE("GPL");
331