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07539c1d KM |
1 | /* |
2 | * Renesas R-Car SCU support | |
3 | * | |
4 | * Copyright (C) 2013 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.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 | #include "rsnd.h" | |
12 | ||
13 | struct rsnd_scu { | |
14 | struct rsnd_scu_platform_info *info; /* rcar_snd.h */ | |
15 | struct rsnd_mod mod; | |
ef749400 | 16 | struct clk *clk; |
07539c1d KM |
17 | }; |
18 | ||
ef749400 | 19 | #define RSND_SCU_NAME_SIZE 16 |
374a5281 KM |
20 | |
21 | /* | |
22 | * ADINR | |
23 | */ | |
24 | #define OTBL_24 (0 << 16) | |
25 | #define OTBL_22 (2 << 16) | |
26 | #define OTBL_20 (4 << 16) | |
27 | #define OTBL_18 (6 << 16) | |
28 | #define OTBL_16 (8 << 16) | |
29 | ||
39cf3c40 KM |
30 | #define rsnd_scu_mode_flags(p) ((p)->info->flags) |
31 | #define rsnd_scu_convert_rate(p) ((p)->info->convert_rate) | |
32 | #define rsnd_mod_to_scu(_mod) \ | |
33 | container_of((_mod), struct rsnd_scu, mod) | |
96c7c0d6 KM |
34 | #define rsnd_scu_hpbif_is_enable(scu) \ |
35 | (rsnd_scu_mode_flags(scu) & RSND_SCU_USE_HPBIF) | |
39cf3c40 KM |
36 | |
37 | #define for_each_rsnd_scu(pos, priv, i) \ | |
38 | for ((i) = 0; \ | |
39 | ((i) < rsnd_scu_nr(priv)) && \ | |
40 | ((pos) = (struct rsnd_scu *)(priv)->scu + i); \ | |
41 | i++) | |
42 | ||
43 | ||
ef749400 KM |
44 | /* |
45 | * image of SRC (Sampling Rate Converter) | |
46 | * | |
47 | * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+ | |
48 | * 48kHz <-> | SRC | <------> | SSI | <-----> | codec | | |
49 | * 44.1kHz <-> +-----+ +-----+ +-------+ | |
50 | * ... | |
51 | * | |
52 | */ | |
374a5281 | 53 | |
c926b746 KM |
54 | /* |
55 | * scu.c is caring... | |
56 | * | |
57 | * Gen1 | |
58 | * | |
59 | * [mem] -> [SRU] -> [SSI] | |
60 | * |--------| | |
61 | * | |
62 | * Gen2 | |
63 | * | |
64 | * [mem] -> [SCU] -> [SSIU] -> [SSI] | |
65 | * |-----------------| | |
66 | */ | |
67 | ||
41c6221c KM |
68 | /* |
69 | * How to use SRC bypass mode for debugging | |
70 | * | |
71 | * SRC has bypass mode, and it is useful for debugging. | |
72 | * In Gen2 case, | |
73 | * SRCm_MODE controls whether SRC is used or not | |
74 | * SSI_MODE0 controls whether SSIU which receives SRC data | |
75 | * is used or not. | |
76 | * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC, | |
77 | * but SRC bypass mode needs SSI_MODE0 only. | |
78 | * | |
79 | * This driver request | |
80 | * struct rsnd_scu_platform_info { | |
81 | * u32 flags; | |
82 | * u32 convert_rate; | |
83 | * } | |
84 | * | |
85 | * rsnd_scu_hpbif_is_enable() will be true | |
86 | * if flags had RSND_SCU_USE_HPBIF, | |
87 | * and it controls whether SSIU is used or not. | |
88 | * | |
89 | * rsnd_scu_convert_rate() indicates | |
90 | * above convert_rate, and it controls | |
91 | * whether SRC is used or not. | |
92 | * | |
93 | * ex) doesn't use SRC | |
94 | * struct rsnd_scu_platform_info info = { | |
95 | * .flags = 0, | |
96 | * .convert_rate = 0, | |
97 | * }; | |
98 | * | |
99 | * ex) uses SRC | |
100 | * struct rsnd_scu_platform_info info = { | |
101 | * .flags = RSND_SCU_USE_HPBIF, | |
102 | * .convert_rate = 48000, | |
103 | * }; | |
104 | * | |
105 | * ex) uses SRC bypass mode | |
106 | * struct rsnd_scu_platform_info info = { | |
107 | * .flags = RSND_SCU_USE_HPBIF, | |
108 | * .convert_rate = 0, | |
109 | * }; | |
110 | * | |
111 | */ | |
112 | ||
7b5ce975 KM |
113 | static int rsnd_scu_ssi_mode_init(struct rsnd_mod *mod, |
114 | struct rsnd_dai *rdai, | |
115 | struct rsnd_dai_stream *io) | |
116 | { | |
117 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
96c7c0d6 | 118 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); |
7b5ce975 KM |
119 | int id = rsnd_mod_id(mod); |
120 | ||
121 | /* | |
122 | * SSI_MODE0 | |
123 | */ | |
124 | rsnd_mod_bset(mod, SSI_MODE0, (1 << id), | |
96c7c0d6 | 125 | rsnd_scu_hpbif_is_enable(scu) ? 0 : (1 << id)); |
7b5ce975 KM |
126 | |
127 | /* | |
128 | * SSI_MODE1 | |
129 | */ | |
130 | if (rsnd_ssi_is_pin_sharing(rsnd_ssi_mod_get(priv, id))) { | |
131 | int shift = -1; | |
132 | switch (id) { | |
133 | case 1: | |
134 | shift = 0; | |
135 | break; | |
136 | case 2: | |
137 | shift = 2; | |
138 | break; | |
139 | case 4: | |
140 | shift = 16; | |
141 | break; | |
142 | } | |
143 | ||
144 | if (shift >= 0) | |
145 | rsnd_mod_bset(mod, SSI_MODE1, | |
146 | 0x3 << shift, | |
147 | rsnd_dai_is_clk_master(rdai) ? | |
148 | 0x2 << shift : 0x1 << shift); | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
2582718c | 154 | /* Gen1 only */ |
47718dc7 | 155 | static int rsnd_src_set_route_if_gen1( |
374a5281 KM |
156 | struct rsnd_mod *mod, |
157 | struct rsnd_dai *rdai, | |
158 | struct rsnd_dai_stream *io) | |
159 | { | |
160 | struct scu_route_config { | |
161 | u32 mask; | |
162 | int shift; | |
163 | } routes[] = { | |
164 | { 0xF, 0, }, /* 0 */ | |
165 | { 0xF, 4, }, /* 1 */ | |
166 | { 0xF, 8, }, /* 2 */ | |
167 | { 0x7, 12, }, /* 3 */ | |
168 | { 0x7, 16, }, /* 4 */ | |
169 | { 0x7, 20, }, /* 5 */ | |
170 | { 0x7, 24, }, /* 6 */ | |
171 | { 0x3, 28, }, /* 7 */ | |
172 | { 0x3, 30, }, /* 8 */ | |
173 | }; | |
47718dc7 | 174 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
374a5281 KM |
175 | u32 mask; |
176 | u32 val; | |
374a5281 KM |
177 | int id; |
178 | ||
179 | /* | |
180 | * Gen1 only | |
181 | */ | |
182 | if (!rsnd_is_gen1(priv)) | |
183 | return 0; | |
184 | ||
185 | id = rsnd_mod_id(mod); | |
b5f3d7af | 186 | if (id < 0 || id >= ARRAY_SIZE(routes)) |
374a5281 KM |
187 | return -EIO; |
188 | ||
189 | /* | |
190 | * SRC_ROUTE_SELECT | |
191 | */ | |
192 | val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2; | |
193 | val = val << routes[id].shift; | |
194 | mask = routes[id].mask << routes[id].shift; | |
195 | ||
196 | rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val); | |
197 | ||
28dc4b63 KM |
198 | return 0; |
199 | } | |
200 | ||
201 | static int rsnd_scu_set_convert_timing_gen1(struct rsnd_mod *mod, | |
202 | struct rsnd_dai *rdai, | |
203 | struct rsnd_dai_stream *io) | |
204 | { | |
205 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
206 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); | |
207 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); | |
208 | u32 convert_rate = rsnd_scu_convert_rate(scu); | |
209 | u32 mask; | |
210 | u32 val; | |
211 | int shift; | |
212 | int id = rsnd_mod_id(mod); | |
213 | int ret; | |
214 | ||
374a5281 KM |
215 | /* |
216 | * SRC_TIMING_SELECT | |
217 | */ | |
218 | shift = (id % 4) * 8; | |
219 | mask = 0x1F << shift; | |
ef749400 KM |
220 | |
221 | /* | |
222 | * ADG is used as source clock if SRC was used, | |
223 | * then, SSI WS is used as destination clock. | |
224 | * SSI WS is used as source clock if SRC is not used | |
225 | * (when playback, source/destination become reverse when capture) | |
226 | */ | |
28dc4b63 KM |
227 | ret = 0; |
228 | if (convert_rate) { | |
229 | /* use ADG */ | |
ef749400 | 230 | val = 0; |
28dc4b63 KM |
231 | ret = rsnd_adg_set_convert_clk_gen1(priv, mod, |
232 | runtime->rate, | |
233 | convert_rate); | |
234 | } else if (8 == id) { | |
235 | /* use SSI WS, but SRU8 is special */ | |
374a5281 | 236 | val = id << shift; |
28dc4b63 KM |
237 | } else { |
238 | /* use SSI WS */ | |
374a5281 | 239 | val = (id + 1) << shift; |
28dc4b63 KM |
240 | } |
241 | ||
242 | if (ret < 0) | |
243 | return ret; | |
374a5281 KM |
244 | |
245 | switch (id / 4) { | |
246 | case 0: | |
247 | rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val); | |
248 | break; | |
249 | case 1: | |
250 | rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val); | |
251 | break; | |
252 | case 2: | |
253 | rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val); | |
254 | break; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
ef749400 KM |
260 | unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv *priv, |
261 | struct rsnd_mod *ssi_mod, | |
262 | struct snd_pcm_runtime *runtime) | |
374a5281 | 263 | { |
ef749400 KM |
264 | struct rsnd_scu *scu; |
265 | unsigned int rate; | |
374a5281 | 266 | |
ef749400 KM |
267 | /* this function is assuming SSI id = SCU id here */ |
268 | scu = rsnd_mod_to_scu(rsnd_scu_mod_get(priv, rsnd_mod_id(ssi_mod))); | |
374a5281 | 269 | |
ef749400 KM |
270 | /* |
271 | * return convert rate if SRC is used, | |
272 | * otherwise, return runtime->rate as usual | |
273 | */ | |
274 | rate = rsnd_scu_convert_rate(scu); | |
275 | if (!rate) | |
276 | rate = runtime->rate; | |
277 | ||
278 | return rate; | |
374a5281 KM |
279 | } |
280 | ||
f80e1c96 KM |
281 | static int rsnd_scu_set_convert_rate(struct rsnd_mod *mod, |
282 | struct rsnd_dai *rdai, | |
283 | struct rsnd_dai_stream *io) | |
374a5281 | 284 | { |
47718dc7 | 285 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
374a5281 | 286 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
ef749400 KM |
287 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); |
288 | u32 convert_rate = rsnd_scu_convert_rate(scu); | |
374a5281 KM |
289 | u32 adinr = runtime->channels; |
290 | ||
ef749400 KM |
291 | /* set/clear soft reset */ |
292 | rsnd_mod_write(mod, SRC_SWRSR, 0); | |
293 | rsnd_mod_write(mod, SRC_SWRSR, 1); | |
294 | ||
295 | /* Initialize the operation of the SRC internal circuits */ | |
296 | rsnd_mod_write(mod, SRC_SRCIR, 1); | |
297 | ||
298 | /* Set channel number and output bit length */ | |
374a5281 KM |
299 | switch (runtime->sample_bits) { |
300 | case 16: | |
301 | adinr |= OTBL_16; | |
302 | break; | |
303 | case 32: | |
304 | adinr |= OTBL_24; | |
305 | break; | |
306 | default: | |
307 | return -EIO; | |
308 | } | |
690ef81e | 309 | rsnd_mod_write(mod, SRC_ADINR, adinr); |
374a5281 | 310 | |
ef749400 KM |
311 | if (convert_rate) { |
312 | u32 fsrate = 0x0400000 / convert_rate * runtime->rate; | |
ef749400 KM |
313 | |
314 | /* Enable the initial value of IFS */ | |
315 | rsnd_mod_write(mod, SRC_IFSCR, 1); | |
316 | ||
317 | /* Set initial value of IFS */ | |
318 | rsnd_mod_write(mod, SRC_IFSVR, fsrate); | |
319 | ||
320 | /* Select SRC mode (fixed value) */ | |
321 | rsnd_mod_write(mod, SRC_SRCCR, 0x00010110); | |
322 | ||
323 | /* Set the restriction value of the FS ratio (98%) */ | |
324 | rsnd_mod_write(mod, SRC_MNFSR, fsrate / 100 * 98); | |
325 | ||
326 | if (rsnd_is_gen1(priv)) { | |
327 | /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */ | |
328 | } | |
ef749400 KM |
329 | } |
330 | ||
331 | /* Cancel the initialization and operate the SRC function */ | |
332 | rsnd_mod_write(mod, SRC_SRCIR, 0); | |
333 | ||
334 | /* use DMA transfer */ | |
0290d2a4 | 335 | rsnd_mod_write(mod, SRC_BUSIF_MODE, 1); |
ef749400 | 336 | |
374a5281 KM |
337 | return 0; |
338 | } | |
339 | ||
a204d90c | 340 | static int rsnd_scu_init(struct rsnd_mod *mod, |
07539c1d KM |
341 | struct rsnd_dai *rdai, |
342 | struct rsnd_dai_stream *io) | |
343 | { | |
ef749400 | 344 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); |
374a5281 KM |
345 | int ret; |
346 | ||
ef749400 KM |
347 | clk_enable(scu->clk); |
348 | ||
7b5ce975 KM |
349 | ret = rsnd_scu_ssi_mode_init(mod, rdai, io); |
350 | if (ret < 0) | |
351 | return ret; | |
352 | ||
47718dc7 | 353 | ret = rsnd_src_set_route_if_gen1(mod, rdai, io); |
374a5281 KM |
354 | if (ret < 0) |
355 | return ret; | |
356 | ||
f80e1c96 | 357 | ret = rsnd_scu_set_convert_rate(mod, rdai, io); |
374a5281 KM |
358 | if (ret < 0) |
359 | return ret; | |
07539c1d | 360 | |
28dc4b63 KM |
361 | ret = rsnd_scu_set_convert_timing_gen1(mod, rdai, io); |
362 | if (ret < 0) | |
363 | return ret; | |
364 | ||
a204d90c KM |
365 | return 0; |
366 | } | |
367 | ||
368 | static int rsnd_scu_quit(struct rsnd_mod *mod, | |
369 | struct rsnd_dai *rdai, | |
370 | struct rsnd_dai_stream *io) | |
371 | { | |
372 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); | |
373 | ||
374 | clk_disable(scu->clk); | |
374a5281 | 375 | |
07539c1d KM |
376 | return 0; |
377 | } | |
378 | ||
a204d90c KM |
379 | static int rsnd_scu_start(struct rsnd_mod *mod, |
380 | struct rsnd_dai *rdai, | |
381 | struct rsnd_dai_stream *io) | |
382 | { | |
383 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
384 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); | |
e7ce74ea | 385 | int id = rsnd_mod_id(mod); |
a204d90c | 386 | |
e7ce74ea KM |
387 | if (rsnd_is_gen1(priv)) |
388 | rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id)); | |
389 | ||
390 | if (rsnd_scu_convert_rate(scu)) | |
391 | rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1); | |
392 | ||
393 | return 0; | |
a204d90c KM |
394 | } |
395 | ||
ef749400 KM |
396 | static int rsnd_scu_stop(struct rsnd_mod *mod, |
397 | struct rsnd_dai *rdai, | |
398 | struct rsnd_dai_stream *io) | |
399 | { | |
400 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
401 | struct rsnd_scu *scu = rsnd_mod_to_scu(mod); | |
e7ce74ea KM |
402 | int id = rsnd_mod_id(mod); |
403 | ||
404 | if (rsnd_is_gen1(priv)) | |
405 | rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0); | |
ef749400 | 406 | |
e7ce74ea KM |
407 | if (rsnd_scu_convert_rate(scu)) |
408 | rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0); | |
ef749400 | 409 | |
ef749400 KM |
410 | return 0; |
411 | } | |
412 | ||
07539c1d KM |
413 | static struct rsnd_mod_ops rsnd_scu_ops = { |
414 | .name = "scu", | |
a204d90c KM |
415 | .init = rsnd_scu_init, |
416 | .quit = rsnd_scu_quit, | |
07539c1d | 417 | .start = rsnd_scu_start, |
ef749400 | 418 | .stop = rsnd_scu_stop, |
07539c1d KM |
419 | }; |
420 | ||
013f38fe KM |
421 | static struct rsnd_mod_ops rsnd_scu_non_ops = { |
422 | .name = "scu (non)", | |
7b5ce975 | 423 | .init = rsnd_scu_ssi_mode_init, |
013f38fe KM |
424 | }; |
425 | ||
07539c1d KM |
426 | struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id) |
427 | { | |
8b14719b TI |
428 | if (WARN_ON(id < 0 || id >= rsnd_scu_nr(priv))) |
429 | id = 0; | |
07539c1d KM |
430 | |
431 | return &((struct rsnd_scu *)(priv->scu) + id)->mod; | |
432 | } | |
433 | ||
434 | int rsnd_scu_probe(struct platform_device *pdev, | |
435 | struct rcar_snd_info *info, | |
436 | struct rsnd_priv *priv) | |
437 | { | |
438 | struct device *dev = rsnd_priv_to_dev(priv); | |
439 | struct rsnd_scu *scu; | |
013f38fe | 440 | struct rsnd_mod_ops *ops; |
ef749400 KM |
441 | struct clk *clk; |
442 | char name[RSND_SCU_NAME_SIZE]; | |
07539c1d KM |
443 | int i, nr; |
444 | ||
445 | /* | |
446 | * init SCU | |
447 | */ | |
448 | nr = info->scu_info_nr; | |
449 | scu = devm_kzalloc(dev, sizeof(*scu) * nr, GFP_KERNEL); | |
450 | if (!scu) { | |
451 | dev_err(dev, "SCU allocate failed\n"); | |
452 | return -ENOMEM; | |
453 | } | |
454 | ||
455 | priv->scu_nr = nr; | |
456 | priv->scu = scu; | |
457 | ||
458 | for_each_rsnd_scu(scu, priv, i) { | |
ef749400 KM |
459 | snprintf(name, RSND_SCU_NAME_SIZE, "scu.%d", i); |
460 | ||
461 | clk = devm_clk_get(dev, name); | |
462 | if (IS_ERR(clk)) | |
463 | return PTR_ERR(clk); | |
464 | ||
07539c1d | 465 | scu->info = &info->scu_info[i]; |
ef749400 | 466 | scu->clk = clk; |
07539c1d | 467 | |
013f38fe | 468 | ops = &rsnd_scu_non_ops; |
96c7c0d6 | 469 | if (rsnd_scu_hpbif_is_enable(scu)) |
013f38fe KM |
470 | ops = &rsnd_scu_ops; |
471 | ||
472 | rsnd_mod_init(priv, &scu->mod, ops, i); | |
473 | ||
374a5281 KM |
474 | dev_dbg(dev, "SCU%d probed\n", i); |
475 | } | |
07539c1d KM |
476 | dev_dbg(dev, "scu probed\n"); |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | void rsnd_scu_remove(struct platform_device *pdev, | |
482 | struct rsnd_priv *priv) | |
483 | { | |
484 | } |