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9aaca968 GW |
1 | /* sound/soc/at32/playpaq_wm8510.c |
2 | * ASoC machine driver for PlayPaq using WM8510 codec | |
3 | * | |
4 | * Copyright (C) 2008 Long Range Systems | |
5 | * Geoffrey Wossum <gwossum@acm.org> | |
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 | * This code is largely inspired by sound/soc/at91/eti_b1_wm8731.c | |
12 | * | |
13 | * NOTE: If you don't have the AT32 enhanced portmux configured (which | |
14 | * isn't currently in the mainline or Atmel patched kernel), you will | |
15 | * need to set the MCLK pin (PA30) to peripheral A in your board initialization | |
16 | * code. Something like: | |
17 | * at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0); | |
18 | * | |
19 | */ | |
20 | ||
21 | /* #define DEBUG */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/version.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/clk.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/platform_device.h> | |
32 | ||
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/soc.h> | |
37 | #include <sound/soc-dapm.h> | |
38 | ||
39 | #include <asm/arch/at32ap700x.h> | |
40 | #include <asm/arch/portmux.h> | |
41 | ||
42 | #include "../codecs/wm8510.h" | |
43 | #include "at32-pcm.h" | |
44 | #include "at32-ssc.h" | |
45 | ||
46 | ||
47 | /*-------------------------------------------------------------------------*\ | |
48 | * constants | |
49 | \*-------------------------------------------------------------------------*/ | |
50 | #define MCLK_PIN GPIO_PIN_PA(30) | |
51 | #define MCLK_PERIPH GPIO_PERIPH_A | |
52 | ||
53 | ||
54 | /*-------------------------------------------------------------------------*\ | |
55 | * data types | |
56 | \*-------------------------------------------------------------------------*/ | |
57 | /* SSC clocking data */ | |
58 | struct ssc_clock_data { | |
59 | /* CMR div */ | |
60 | unsigned int cmr_div; | |
61 | ||
62 | /* Frame period (as needed by xCMR.PERIOD) */ | |
63 | unsigned int period; | |
64 | ||
65 | /* The SSC clock rate these settings where calculated for */ | |
66 | unsigned long ssc_rate; | |
67 | }; | |
68 | ||
69 | ||
70 | /*-------------------------------------------------------------------------*\ | |
71 | * module data | |
72 | \*-------------------------------------------------------------------------*/ | |
73 | static struct clk *_gclk0; | |
74 | static struct clk *_pll0; | |
75 | ||
76 | #define CODEC_CLK (_gclk0) | |
77 | ||
78 | ||
79 | /*-------------------------------------------------------------------------*\ | |
80 | * Sound SOC operations | |
81 | \*-------------------------------------------------------------------------*/ | |
82 | #if defined CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE | |
83 | static struct ssc_clock_data playpaq_wm8510_calc_ssc_clock( | |
84 | struct snd_pcm_hw_params *params, | |
453ba20b | 85 | struct snd_soc_dai *cpu_dai) |
9aaca968 GW |
86 | { |
87 | struct at32_ssc_info *ssc_p = cpu_dai->private_data; | |
88 | struct ssc_device *ssc = ssc_p->ssc; | |
89 | struct ssc_clock_data cd; | |
90 | unsigned int rate, width_bits, channels; | |
91 | unsigned int bitrate, ssc_div; | |
92 | unsigned actual_rate; | |
93 | ||
94 | ||
95 | /* | |
96 | * Figure out required bitrate | |
97 | */ | |
98 | rate = params_rate(params); | |
99 | channels = params_channels(params); | |
100 | width_bits = snd_pcm_format_physical_width(params_format(params)); | |
101 | bitrate = rate * width_bits * channels; | |
102 | ||
103 | ||
104 | /* | |
105 | * Figure out required SSC divider and period for required bitrate | |
106 | */ | |
107 | cd.ssc_rate = clk_get_rate(ssc->clk); | |
108 | ssc_div = cd.ssc_rate / bitrate; | |
109 | cd.cmr_div = ssc_div / 2; | |
110 | if (ssc_div & 1) { | |
111 | /* round cmr_div up */ | |
112 | cd.cmr_div++; | |
113 | } | |
114 | cd.period = width_bits - 1; | |
115 | ||
116 | ||
117 | /* | |
118 | * Find actual rate, compare to requested rate | |
119 | */ | |
120 | actual_rate = (cd.ssc_rate / (cd.cmr_div * 2)) / (2 * (cd.period + 1)); | |
121 | pr_debug("playpaq_wm8510: Request rate = %d, actual rate = %d\n", | |
122 | rate, actual_rate); | |
123 | ||
124 | ||
125 | return cd; | |
126 | } | |
127 | #endif /* CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE */ | |
128 | ||
129 | ||
130 | ||
131 | static int playpaq_wm8510_hw_params(struct snd_pcm_substream *substream, | |
132 | struct snd_pcm_hw_params *params) | |
133 | { | |
134 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
453ba20b LG |
135 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; |
136 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
9aaca968 GW |
137 | struct at32_ssc_info *ssc_p = cpu_dai->private_data; |
138 | struct ssc_device *ssc = ssc_p->ssc; | |
139 | unsigned int pll_out = 0, bclk = 0, mclk_div = 0; | |
140 | int ret; | |
141 | ||
142 | ||
143 | /* Due to difficulties with getting the correct clocks from the AT32's | |
144 | * PLL0, we're going to let the CODEC be in charge of all the clocks | |
145 | */ | |
146 | #if !defined CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE | |
147 | const unsigned int fmt = (SND_SOC_DAIFMT_I2S | | |
148 | SND_SOC_DAIFMT_NB_NF | | |
149 | SND_SOC_DAIFMT_CBM_CFM); | |
150 | #else | |
151 | struct ssc_clock_data cd; | |
152 | const unsigned int fmt = (SND_SOC_DAIFMT_I2S | | |
153 | SND_SOC_DAIFMT_NB_NF | | |
154 | SND_SOC_DAIFMT_CBS_CFS); | |
155 | #endif | |
156 | ||
157 | if (ssc == NULL) { | |
158 | pr_warning("playpaq_wm8510_hw_params: ssc is NULL!\n"); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | ||
163 | /* | |
164 | * Figure out PLL and BCLK dividers for WM8510 | |
165 | */ | |
166 | switch (params_rate(params)) { | |
167 | case 48000: | |
168 | pll_out = 12288000; | |
169 | mclk_div = WM8510_MCLKDIV_1; | |
170 | bclk = WM8510_BCLKDIV_8; | |
171 | break; | |
172 | ||
173 | case 44100: | |
174 | pll_out = 11289600; | |
175 | mclk_div = WM8510_MCLKDIV_1; | |
176 | bclk = WM8510_BCLKDIV_8; | |
177 | break; | |
178 | ||
179 | case 22050: | |
180 | pll_out = 11289600; | |
181 | mclk_div = WM8510_MCLKDIV_2; | |
182 | bclk = WM8510_BCLKDIV_8; | |
183 | break; | |
184 | ||
185 | case 16000: | |
186 | pll_out = 12288000; | |
187 | mclk_div = WM8510_MCLKDIV_3; | |
188 | bclk = WM8510_BCLKDIV_8; | |
189 | break; | |
190 | ||
191 | case 11025: | |
192 | pll_out = 11289600; | |
193 | mclk_div = WM8510_MCLKDIV_4; | |
194 | bclk = WM8510_BCLKDIV_8; | |
195 | break; | |
196 | ||
197 | case 8000: | |
198 | pll_out = 12288000; | |
199 | mclk_div = WM8510_MCLKDIV_6; | |
200 | bclk = WM8510_BCLKDIV_8; | |
201 | break; | |
202 | ||
203 | default: | |
204 | pr_warning("playpaq_wm8510: Unsupported sample rate %d\n", | |
205 | params_rate(params)); | |
206 | return -EINVAL; | |
207 | } | |
208 | ||
209 | ||
210 | /* | |
211 | * set CPU and CODEC DAI configuration | |
212 | */ | |
64105cfd | 213 | ret = snd_soc_dai_set_fmt(codec_dai, fmt); |
9aaca968 GW |
214 | if (ret < 0) { |
215 | pr_warning("playpaq_wm8510: " | |
216 | "Failed to set CODEC DAI format (%d)\n", | |
217 | ret); | |
218 | return ret; | |
219 | } | |
64105cfd | 220 | ret = snd_soc_dai_set_fmt(cpu_dai, fmt); |
9aaca968 GW |
221 | if (ret < 0) { |
222 | pr_warning("playpaq_wm8510: " | |
223 | "Failed to set CPU DAI format (%d)\n", | |
224 | ret); | |
225 | return ret; | |
226 | } | |
227 | ||
228 | ||
229 | /* | |
230 | * Set CPU clock configuration | |
231 | */ | |
232 | #if defined CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE | |
233 | cd = playpaq_wm8510_calc_ssc_clock(params, cpu_dai); | |
234 | pr_debug("playpaq_wm8510: cmr_div = %d, period = %d\n", | |
235 | cd.cmr_div, cd.period); | |
64105cfd | 236 | ret = snd_soc_dai_set_clkdiv(cpu_dai, AT32_SSC_CMR_DIV, cd.cmr_div); |
9aaca968 GW |
237 | if (ret < 0) { |
238 | pr_warning("playpaq_wm8510: Failed to set CPU CMR_DIV (%d)\n", | |
239 | ret); | |
240 | return ret; | |
241 | } | |
64105cfd | 242 | ret = snd_soc_dai_set_clkdiv(cpu_dai, AT32_SSC_TCMR_PERIOD, |
9aaca968 GW |
243 | cd.period); |
244 | if (ret < 0) { | |
245 | pr_warning("playpaq_wm8510: " | |
246 | "Failed to set CPU transmit period (%d)\n", | |
247 | ret); | |
248 | return ret; | |
249 | } | |
250 | #endif /* CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE */ | |
251 | ||
252 | ||
253 | /* | |
254 | * Set CODEC clock configuration | |
255 | */ | |
256 | pr_debug("playpaq_wm8510: " | |
257 | "pll_in = %ld, pll_out = %u, bclk = %x, mclk = %x\n", | |
258 | clk_get_rate(CODEC_CLK), pll_out, bclk, mclk_div); | |
259 | ||
260 | ||
261 | #if !defined CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE | |
64105cfd | 262 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8510_BCLKDIV, bclk); |
9aaca968 GW |
263 | if (ret < 0) { |
264 | pr_warning | |
265 | ("playpaq_wm8510: Failed to set CODEC DAI BCLKDIV (%d)\n", | |
266 | ret); | |
267 | return ret; | |
268 | } | |
269 | #endif /* CONFIG_SND_AT32_SOC_PLAYPAQ_SLAVE */ | |
270 | ||
271 | ||
64105cfd | 272 | ret = snd_soc_dai_set_pll(codec_dai, 0, |
9aaca968 GW |
273 | clk_get_rate(CODEC_CLK), pll_out); |
274 | if (ret < 0) { | |
275 | pr_warning("playpaq_wm8510: Failed to set CODEC DAI PLL (%d)\n", | |
276 | ret); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | ||
64105cfd | 281 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8510_MCLKDIV, mclk_div); |
9aaca968 GW |
282 | if (ret < 0) { |
283 | pr_warning("playpaq_wm8510: Failed to set CODEC MCLKDIV (%d)\n", | |
284 | ret); | |
285 | return ret; | |
286 | } | |
287 | ||
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | ||
293 | ||
294 | static struct snd_soc_ops playpaq_wm8510_ops = { | |
295 | .hw_params = playpaq_wm8510_hw_params, | |
296 | }; | |
297 | ||
298 | ||
299 | ||
300 | static const struct snd_soc_dapm_widget playpaq_dapm_widgets[] = { | |
301 | SND_SOC_DAPM_MIC("Int Mic", NULL), | |
302 | SND_SOC_DAPM_SPK("Ext Spk", NULL), | |
303 | }; | |
304 | ||
305 | ||
306 | ||
307 | static const char *intercon[][3] = { | |
308 | /* speaker connected to SPKOUT */ | |
309 | {"Ext Spk", NULL, "SPKOUTP"}, | |
310 | {"Ext Spk", NULL, "SPKOUTN"}, | |
311 | ||
312 | {"Mic Bias", NULL, "Int Mic"}, | |
313 | {"MICN", NULL, "Mic Bias"}, | |
314 | {"MICP", NULL, "Mic Bias"}, | |
315 | ||
316 | /* Terminator */ | |
317 | {NULL, NULL, NULL}, | |
318 | }; | |
319 | ||
320 | ||
321 | ||
322 | static int playpaq_wm8510_init(struct snd_soc_codec *codec) | |
323 | { | |
324 | int i; | |
325 | ||
326 | /* | |
327 | * Add DAPM widgets | |
328 | */ | |
329 | for (i = 0; i < ARRAY_SIZE(playpaq_dapm_widgets); i++) | |
330 | snd_soc_dapm_new_control(codec, &playpaq_dapm_widgets[i]); | |
331 | ||
332 | ||
333 | ||
334 | /* | |
335 | * Setup audio path interconnects | |
336 | */ | |
337 | for (i = 0; intercon[i][0] != NULL; i++) { | |
338 | snd_soc_dapm_connect_input(codec, | |
339 | intercon[i][0], | |
340 | intercon[i][1], intercon[i][2]); | |
341 | } | |
342 | ||
343 | ||
344 | /* always connected endpoints */ | |
345 | snd_soc_dapm_set_endpoint(codec, "Int Mic", 1); | |
346 | snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1); | |
347 | snd_soc_dapm_sync_endpoints(codec); | |
348 | ||
349 | ||
350 | ||
351 | /* Make CSB show PLL rate */ | |
352 | codec->dai->dai_ops.set_clkdiv(codec->dai, WM8510_OPCLKDIV, | |
353 | WM8510_OPCLKDIV_1 | 4); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | ||
359 | ||
360 | static struct snd_soc_dai_link playpaq_wm8510_dai = { | |
361 | .name = "WM8510", | |
362 | .stream_name = "WM8510 PCM", | |
363 | .cpu_dai = &at32_ssc_dai[0], | |
364 | .codec_dai = &wm8510_dai, | |
365 | .init = playpaq_wm8510_init, | |
366 | .ops = &playpaq_wm8510_ops, | |
367 | }; | |
368 | ||
369 | ||
370 | ||
371 | static struct snd_soc_machine snd_soc_machine_playpaq = { | |
372 | .name = "LRS_PlayPaq_WM8510", | |
373 | .dai_link = &playpaq_wm8510_dai, | |
374 | .num_links = 1, | |
375 | }; | |
376 | ||
377 | ||
378 | ||
379 | static struct wm8510_setup_data playpaq_wm8510_setup = { | |
380 | .i2c_address = 0x1a, | |
381 | }; | |
382 | ||
383 | ||
384 | ||
385 | static struct snd_soc_device playpaq_wm8510_snd_devdata = { | |
386 | .machine = &snd_soc_machine_playpaq, | |
387 | .platform = &at32_soc_platform, | |
388 | .codec_dev = &soc_codec_dev_wm8510, | |
389 | .codec_data = &playpaq_wm8510_setup, | |
390 | }; | |
391 | ||
392 | static struct platform_device *playpaq_snd_device; | |
393 | ||
394 | ||
395 | static int __init playpaq_asoc_init(void) | |
396 | { | |
397 | int ret = 0; | |
398 | struct at32_ssc_info *ssc_p = playpaq_wm8510_dai.cpu_dai->private_data; | |
399 | struct ssc_device *ssc = NULL; | |
400 | ||
401 | ||
402 | /* | |
403 | * Request SSC device | |
404 | */ | |
405 | ssc = ssc_request(0); | |
406 | if (IS_ERR(ssc)) { | |
407 | ret = PTR_ERR(ssc); | |
408 | ssc = NULL; | |
409 | goto err_ssc; | |
410 | } | |
411 | ssc_p->ssc = ssc; | |
412 | ||
413 | ||
414 | /* | |
415 | * Configure MCLK for WM8510 | |
416 | */ | |
417 | _gclk0 = clk_get(NULL, "gclk0"); | |
418 | if (IS_ERR(_gclk0)) { | |
419 | _gclk0 = NULL; | |
420 | goto err_gclk0; | |
421 | } | |
422 | _pll0 = clk_get(NULL, "pll0"); | |
423 | if (IS_ERR(_pll0)) { | |
424 | _pll0 = NULL; | |
425 | goto err_pll0; | |
426 | } | |
427 | if (clk_set_parent(_gclk0, _pll0)) { | |
428 | pr_warning("snd-soc-playpaq: " | |
429 | "Failed to set PLL0 as parent for DAC clock\n"); | |
430 | goto err_set_clk; | |
431 | } | |
432 | clk_set_rate(CODEC_CLK, 12000000); | |
433 | clk_enable(CODEC_CLK); | |
434 | ||
435 | #if defined CONFIG_AT32_ENHANCED_PORTMUX | |
436 | at32_select_periph(MCLK_PIN, MCLK_PERIPH, 0); | |
437 | #endif | |
438 | ||
439 | ||
440 | /* | |
441 | * Create and register platform device | |
442 | */ | |
443 | playpaq_snd_device = platform_device_alloc("soc-audio", 0); | |
444 | if (playpaq_snd_device == NULL) { | |
445 | ret = -ENOMEM; | |
446 | goto err_device_alloc; | |
447 | } | |
448 | ||
449 | platform_set_drvdata(playpaq_snd_device, &playpaq_wm8510_snd_devdata); | |
450 | playpaq_wm8510_snd_devdata.dev = &playpaq_snd_device->dev; | |
451 | ||
452 | ret = platform_device_add(playpaq_snd_device); | |
453 | if (ret) { | |
454 | pr_warning("playpaq_wm8510: platform_device_add failed (%d)\n", | |
455 | ret); | |
456 | goto err_device_add; | |
457 | } | |
458 | ||
459 | return 0; | |
460 | ||
461 | ||
462 | err_device_add: | |
463 | if (playpaq_snd_device != NULL) { | |
464 | platform_device_put(playpaq_snd_device); | |
465 | playpaq_snd_device = NULL; | |
466 | } | |
467 | err_device_alloc: | |
468 | err_set_clk: | |
469 | if (_pll0 != NULL) { | |
470 | clk_put(_pll0); | |
471 | _pll0 = NULL; | |
472 | } | |
473 | err_pll0: | |
474 | if (_gclk0 != NULL) { | |
475 | clk_put(_gclk0); | |
476 | _gclk0 = NULL; | |
477 | } | |
478 | err_gclk0: | |
479 | if (ssc != NULL) { | |
480 | ssc_free(ssc); | |
481 | ssc = NULL; | |
482 | } | |
483 | err_ssc: | |
484 | return ret; | |
485 | } | |
486 | ||
487 | ||
488 | static void __exit playpaq_asoc_exit(void) | |
489 | { | |
490 | struct at32_ssc_info *ssc_p = playpaq_wm8510_dai.cpu_dai->private_data; | |
491 | struct ssc_device *ssc; | |
492 | ||
493 | if (ssc_p != NULL) { | |
494 | ssc = ssc_p->ssc; | |
495 | if (ssc != NULL) | |
496 | ssc_free(ssc); | |
497 | ssc_p->ssc = NULL; | |
498 | } | |
499 | ||
500 | if (_gclk0 != NULL) { | |
501 | clk_put(_gclk0); | |
502 | _gclk0 = NULL; | |
503 | } | |
504 | if (_pll0 != NULL) { | |
505 | clk_put(_pll0); | |
506 | _pll0 = NULL; | |
507 | } | |
508 | ||
509 | #if defined CONFIG_AT32_ENHANCED_PORTMUX | |
510 | at32_free_pin(MCLK_PIN); | |
511 | #endif | |
512 | ||
513 | platform_device_unregister(playpaq_snd_device); | |
514 | playpaq_snd_device = NULL; | |
515 | } | |
516 | ||
517 | module_init(playpaq_asoc_init); | |
518 | module_exit(playpaq_asoc_exit); | |
519 | ||
520 | MODULE_AUTHOR("Geoffrey Wossum <gwossum@acm.org>"); | |
521 | MODULE_DESCRIPTION("ASoC machine driver for LRS PlayPaq"); | |
522 | MODULE_LICENSE("GPL"); |