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13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/of_device.h>
16#include <linux/slab.h>
17#include <sound/soc.h>
18#include <asm/fsl_guts.h>
19
20#include "fsl_dma.h"
21#include "fsl_ssi.h"
22
23
24static phys_addr_t guts_phys;
25
26#define DAI_NAME_SIZE 32
27
28
29
30
31
32
33
34struct mpc8610_hpcd_data {
35 struct snd_soc_dai_link dai[2];
36 struct snd_soc_card card;
37 unsigned int dai_format;
38 unsigned int codec_clk_direction;
39 unsigned int cpu_clk_direction;
40 unsigned int clk_frequency;
41 unsigned int ssi_id;
42 unsigned int dma_id[2];
43 unsigned int dma_channel_id[2];
44 char codec_dai_name[DAI_NAME_SIZE];
45 char codec_name[DAI_NAME_SIZE];
46 char platform_name[2][DAI_NAME_SIZE];
47};
48
49
50
51
52
53
54
55
56static int mpc8610_hpcd_machine_probe(struct snd_soc_card *card)
57{
58 struct mpc8610_hpcd_data *machine_data =
59 container_of(card, struct mpc8610_hpcd_data, card);
60 struct ccsr_guts_86xx __iomem *guts;
61
62 guts = ioremap(guts_phys, sizeof(struct ccsr_guts_86xx));
63 if (!guts) {
64 dev_err(card->dev, "could not map global utilities\n");
65 return -ENOMEM;
66 }
67
68
69 guts_set_dmacr(guts, machine_data->dma_id[0],
70 machine_data->dma_channel_id[0],
71 CCSR_GUTS_DMACR_DEV_SSI);
72 guts_set_dmacr(guts, machine_data->dma_id[1],
73 machine_data->dma_channel_id[1],
74 CCSR_GUTS_DMACR_DEV_SSI);
75
76 guts_set_pmuxcr_dma(guts, machine_data->dma_id[0],
77 machine_data->dma_channel_id[0], 0);
78 guts_set_pmuxcr_dma(guts, machine_data->dma_id[1],
79 machine_data->dma_channel_id[1], 0);
80
81 switch (machine_data->ssi_id) {
82 case 0:
83 clrsetbits_be32(&guts->pmuxcr,
84 CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
85 break;
86 case 1:
87 clrsetbits_be32(&guts->pmuxcr,
88 CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
89 break;
90 }
91
92 iounmap(guts);
93
94 return 0;
95}
96
97
98
99
100
101
102
103
104static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
105{
106 struct snd_soc_pcm_runtime *rtd = substream->private_data;
107 struct mpc8610_hpcd_data *machine_data =
108 container_of(rtd->card, struct mpc8610_hpcd_data, card);
109 struct device *dev = rtd->card->dev;
110 int ret = 0;
111
112
113 ret = snd_soc_dai_set_fmt(rtd->codec_dai, machine_data->dai_format);
114 if (ret < 0) {
115 dev_err(dev, "could not set codec driver audio format\n");
116 return ret;
117 }
118
119
120
121
122
123 ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0,
124 machine_data->clk_frequency,
125 machine_data->codec_clk_direction);
126 if (ret < 0) {
127 dev_err(dev, "could not set codec driver clock params\n");
128 return ret;
129 }
130
131 return 0;
132}
133
134
135
136
137
138
139
140static int mpc8610_hpcd_machine_remove(struct snd_soc_card *card)
141{
142 struct mpc8610_hpcd_data *machine_data =
143 container_of(card, struct mpc8610_hpcd_data, card);
144 struct ccsr_guts_86xx __iomem *guts;
145
146 guts = ioremap(guts_phys, sizeof(struct ccsr_guts_86xx));
147 if (!guts) {
148 dev_err(card->dev, "could not map global utilities\n");
149 return -ENOMEM;
150 }
151
152
153
154 guts_set_dmacr(guts, machine_data->dma_id[0],
155 machine_data->dma_channel_id[0], 0);
156 guts_set_dmacr(guts, machine_data->dma_id[1],
157 machine_data->dma_channel_id[1], 0);
158
159 switch (machine_data->ssi_id) {
160 case 0:
161 clrsetbits_be32(&guts->pmuxcr,
162 CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
163 break;
164 case 1:
165 clrsetbits_be32(&guts->pmuxcr,
166 CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
167 break;
168 }
169
170 iounmap(guts);
171
172 return 0;
173}
174
175
176
177
178static struct snd_soc_ops mpc8610_hpcd_ops = {
179 .startup = mpc8610_hpcd_startup,
180};
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190
191
192static struct device_node *get_node_by_phandle_name(struct device_node *np,
193 const char *name,
194 const char *compatible)
195{
196 const phandle *ph;
197 int len;
198
199 ph = of_get_property(np, name, &len);
200 if (!ph || (len != sizeof(phandle)))
201 return NULL;
202
203 np = of_find_node_by_phandle(*ph);
204 if (!np)
205 return NULL;
206
207 if (compatible && !of_device_is_compatible(np, compatible)) {
208 of_node_put(np);
209 return NULL;
210 }
211
212 return np;
213}
214
215
216
217
218
219
220
221
222static int get_parent_cell_index(struct device_node *np)
223{
224 struct device_node *parent = of_get_parent(np);
225 const u32 *iprop;
226
227 if (!parent)
228 return -1;
229
230 iprop = of_get_property(parent, "cell-index", NULL);
231 of_node_put(parent);
232
233 if (!iprop)
234 return -1;
235
236 return be32_to_cpup(iprop);
237}
238
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243
244
245
246
247
248
249static int codec_node_dev_name(struct device_node *np, char *buf, size_t len)
250{
251 const u32 *iprop;
252 int bus, addr;
253 char temp[DAI_NAME_SIZE];
254
255 of_modalias_node(np, temp, DAI_NAME_SIZE);
256
257 iprop = of_get_property(np, "reg", NULL);
258 if (!iprop)
259 return -EINVAL;
260
261 addr = be32_to_cpup(iprop);
262
263 bus = get_parent_cell_index(np);
264 if (bus < 0)
265 return bus;
266
267 snprintf(buf, len, "%s-codec.%u-%04x", temp, bus, addr);
268
269 return 0;
270}
271
272static int get_dma_channel(struct device_node *ssi_np,
273 const char *compatible,
274 struct snd_soc_dai_link *dai,
275 unsigned int *dma_channel_id,
276 unsigned int *dma_id)
277{
278 struct resource res;
279 struct device_node *dma_channel_np;
280 const u32 *iprop;
281 int ret;
282
283 dma_channel_np = get_node_by_phandle_name(ssi_np, compatible,
284 "fsl,ssi-dma-channel");
285 if (!dma_channel_np)
286 return -EINVAL;
287
288
289
290
291
292
293
294
295
296 ret = of_address_to_resource(dma_channel_np, 0, &res);
297 if (ret)
298 return ret;
299 snprintf((char *)dai->platform_name, DAI_NAME_SIZE, "%llx.%s",
300 (unsigned long long) res.start, dma_channel_np->name);
301
302 iprop = of_get_property(dma_channel_np, "cell-index", NULL);
303 if (!iprop) {
304 of_node_put(dma_channel_np);
305 return -EINVAL;
306 }
307
308 *dma_channel_id = be32_to_cpup(iprop);
309 *dma_id = get_parent_cell_index(dma_channel_np);
310 of_node_put(dma_channel_np);
311
312 return 0;
313}
314
315
316
317
318
319
320
321
322static int mpc8610_hpcd_probe(struct platform_device *pdev)
323{
324 struct device *dev = pdev->dev.parent;
325
326 struct platform_device *ssi_pdev =
327 container_of(dev, struct platform_device, dev);
328 struct device_node *np = ssi_pdev->dev.of_node;
329 struct device_node *codec_np = NULL;
330 struct platform_device *sound_device = NULL;
331 struct mpc8610_hpcd_data *machine_data;
332 int ret = -ENODEV;
333 const char *sprop;
334 const u32 *iprop;
335
336
337
338
339
340 codec_np = get_node_by_phandle_name(np, "codec-handle",
341 "cirrus,cs4270");
342 if (!codec_np) {
343 dev_err(dev, "invalid codec node\n");
344 return -EINVAL;
345 }
346
347 machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
348 if (!machine_data) {
349 ret = -ENOMEM;
350 goto error_alloc;
351 }
352
353 machine_data->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
354 machine_data->dai[0].ops = &mpc8610_hpcd_ops;
355
356
357 ret = codec_node_dev_name(codec_np, machine_data->codec_name,
358 DAI_NAME_SIZE);
359 if (ret) {
360 dev_err(&pdev->dev, "invalid codec node %s\n",
361 codec_np->full_name);
362 ret = -EINVAL;
363 goto error;
364 }
365 machine_data->dai[0].codec_name = machine_data->codec_name;
366
367
368 machine_data->dai[0].codec_dai_name = "cs4270-hifi";
369
370
371
372
373
374 memcpy(&machine_data->dai[1], &machine_data->dai[0],
375 sizeof(struct snd_soc_dai_link));
376
377
378 iprop = of_get_property(np, "cell-index", NULL);
379 if (!iprop) {
380 dev_err(&pdev->dev, "cell-index property not found\n");
381 ret = -EINVAL;
382 goto error;
383 }
384 machine_data->ssi_id = be32_to_cpup(iprop);
385
386
387 sprop = of_get_property(np, "fsl,mode", NULL);
388 if (!sprop) {
389 dev_err(&pdev->dev, "fsl,mode property not found\n");
390 ret = -EINVAL;
391 goto error;
392 }
393
394 if (strcasecmp(sprop, "i2s-slave") == 0) {
395 machine_data->dai_format =
396 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM;
397 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
398 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
399
400
401
402
403
404 iprop = of_get_property(codec_np, "clock-frequency", NULL);
405 if (!iprop || !*iprop) {
406 dev_err(&pdev->dev, "codec bus-frequency "
407 "property is missing or invalid\n");
408 ret = -EINVAL;
409 goto error;
410 }
411 machine_data->clk_frequency = be32_to_cpup(iprop);
412 } else if (strcasecmp(sprop, "i2s-master") == 0) {
413 machine_data->dai_format =
414 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
415 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
416 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
417 } else if (strcasecmp(sprop, "lj-slave") == 0) {
418 machine_data->dai_format =
419 SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBM_CFM;
420 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
421 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
422 } else if (strcasecmp(sprop, "lj-master") == 0) {
423 machine_data->dai_format =
424 SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBS_CFS;
425 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
426 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
427 } else if (strcasecmp(sprop, "rj-slave") == 0) {
428 machine_data->dai_format =
429 SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBM_CFM;
430 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
431 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
432 } else if (strcasecmp(sprop, "rj-master") == 0) {
433 machine_data->dai_format =
434 SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBS_CFS;
435 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
436 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
437 } else if (strcasecmp(sprop, "ac97-slave") == 0) {
438 machine_data->dai_format =
439 SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBM_CFM;
440 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
441 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
442 } else if (strcasecmp(sprop, "ac97-master") == 0) {
443 machine_data->dai_format =
444 SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBS_CFS;
445 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
446 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
447 } else {
448 dev_err(&pdev->dev,
449 "unrecognized fsl,mode property '%s'\n", sprop);
450 ret = -EINVAL;
451 goto error;
452 }
453
454 if (!machine_data->clk_frequency) {
455 dev_err(&pdev->dev, "unknown clock frequency\n");
456 ret = -EINVAL;
457 goto error;
458 }
459
460
461 machine_data->dai[0].platform_name = machine_data->platform_name[0];
462 ret = get_dma_channel(np, "fsl,playback-dma", &machine_data->dai[0],
463 &machine_data->dma_channel_id[0],
464 &machine_data->dma_id[0]);
465 if (ret) {
466 dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
467 goto error;
468 }
469
470
471 machine_data->dai[1].platform_name = machine_data->platform_name[1];
472 ret = get_dma_channel(np, "fsl,capture-dma", &machine_data->dai[1],
473 &machine_data->dma_channel_id[1],
474 &machine_data->dma_id[1]);
475 if (ret) {
476 dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
477 goto error;
478 }
479
480
481 machine_data->dai[0].stream_name = "playback";
482 machine_data->dai[1].stream_name = "capture";
483 machine_data->dai[0].name = machine_data->dai[0].stream_name;
484 machine_data->dai[1].name = machine_data->dai[1].stream_name;
485
486 machine_data->card.probe = mpc8610_hpcd_machine_probe;
487 machine_data->card.remove = mpc8610_hpcd_machine_remove;
488 machine_data->card.name = pdev->name;
489 machine_data->card.num_links = 2;
490 machine_data->card.dai_link = machine_data->dai;
491
492
493 sound_device = platform_device_alloc("soc-audio", -1);
494 if (!sound_device) {
495 dev_err(&pdev->dev, "platform device alloc failed\n");
496 ret = -ENOMEM;
497 goto error;
498 }
499
500
501 platform_set_drvdata(sound_device, &machine_data->card);
502
503
504 ret = platform_device_add(sound_device);
505 if (ret) {
506 dev_err(&pdev->dev, "platform device add failed\n");
507 goto error_sound;
508 }
509 dev_set_drvdata(&pdev->dev, sound_device);
510
511 of_node_put(codec_np);
512
513 return 0;
514
515error_sound:
516 platform_device_put(sound_device);
517error:
518 kfree(machine_data);
519error_alloc:
520 of_node_put(codec_np);
521 return ret;
522}
523
524
525
526
527
528
529static int __devexit mpc8610_hpcd_remove(struct platform_device *pdev)
530{
531 struct platform_device *sound_device = dev_get_drvdata(&pdev->dev);
532 struct snd_soc_card *card = platform_get_drvdata(sound_device);
533 struct mpc8610_hpcd_data *machine_data =
534 container_of(card, struct mpc8610_hpcd_data, card);
535
536 platform_device_unregister(sound_device);
537
538 kfree(machine_data);
539 sound_device->dev.platform_data = NULL;
540
541 dev_set_drvdata(&pdev->dev, NULL);
542
543 return 0;
544}
545
546static struct platform_driver mpc8610_hpcd_driver = {
547 .probe = mpc8610_hpcd_probe,
548 .remove = __devexit_p(mpc8610_hpcd_remove),
549 .driver = {
550
551
552
553 .name = "snd-soc-mpc8610hpcd",
554 .owner = THIS_MODULE,
555 },
556};
557
558
559
560
561
562
563static int __init mpc8610_hpcd_init(void)
564{
565 struct device_node *guts_np;
566 struct resource res;
567
568 pr_info("Freescale MPC8610 HPCD ALSA SoC machine driver\n");
569
570
571 guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
572 if (of_address_to_resource(guts_np, 0, &res)) {
573 pr_err("mpc8610-hpcd: missing/invalid global utilities node\n");
574 return -EINVAL;
575 }
576 guts_phys = res.start;
577
578 return platform_driver_register(&mpc8610_hpcd_driver);
579}
580
581
582
583
584
585
586static void __exit mpc8610_hpcd_exit(void)
587{
588 platform_driver_unregister(&mpc8610_hpcd_driver);
589}
590
591module_init(mpc8610_hpcd_init);
592module_exit(mpc8610_hpcd_exit);
593
594MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
595MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC machine driver");
596MODULE_LICENSE("GPL v2");
597