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ae5c3223 KM |
1 | /* |
2 | * Renesas R-Car SSIU/SSI support | |
3 | * | |
4 | * Copyright (C) 2013 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * Based on fsi.c | |
8 | * Kuninori Morimoto <morimoto.kuninori@renesas.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | #include <linux/delay.h> | |
15 | #include "rsnd.h" | |
16 | #define RSND_SSI_NAME_SIZE 16 | |
17 | ||
18 | /* | |
19 | * SSICR | |
20 | */ | |
21 | #define FORCE (1 << 31) /* Fixed */ | |
849fc82a | 22 | #define DMEN (1 << 28) /* DMA Enable */ |
ae5c3223 KM |
23 | #define UIEN (1 << 27) /* Underflow Interrupt Enable */ |
24 | #define OIEN (1 << 26) /* Overflow Interrupt Enable */ | |
25 | #define IIEN (1 << 25) /* Idle Mode Interrupt Enable */ | |
26 | #define DIEN (1 << 24) /* Data Interrupt Enable */ | |
27 | ||
28 | #define DWL_8 (0 << 19) /* Data Word Length */ | |
29 | #define DWL_16 (1 << 19) /* Data Word Length */ | |
30 | #define DWL_18 (2 << 19) /* Data Word Length */ | |
31 | #define DWL_20 (3 << 19) /* Data Word Length */ | |
32 | #define DWL_22 (4 << 19) /* Data Word Length */ | |
33 | #define DWL_24 (5 << 19) /* Data Word Length */ | |
34 | #define DWL_32 (6 << 19) /* Data Word Length */ | |
35 | ||
36 | #define SWL_32 (3 << 16) /* R/W System Word Length */ | |
37 | #define SCKD (1 << 15) /* Serial Bit Clock Direction */ | |
38 | #define SWSD (1 << 14) /* Serial WS Direction */ | |
39 | #define SCKP (1 << 13) /* Serial Bit Clock Polarity */ | |
40 | #define SWSP (1 << 12) /* Serial WS Polarity */ | |
41 | #define SDTA (1 << 10) /* Serial Data Alignment */ | |
42 | #define DEL (1 << 8) /* Serial Data Delay */ | |
43 | #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */ | |
44 | #define TRMD (1 << 1) /* Transmit/Receive Mode Select */ | |
45 | #define EN (1 << 0) /* SSI Module Enable */ | |
46 | ||
47 | /* | |
48 | * SSISR | |
49 | */ | |
50 | #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */ | |
51 | #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */ | |
52 | #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */ | |
53 | #define DIRQ (1 << 24) /* Data Interrupt Status Flag */ | |
54 | ||
849fc82a KM |
55 | /* |
56 | * SSIWSR | |
57 | */ | |
58 | #define CONT (1 << 8) /* WS Continue Function */ | |
59 | ||
8aefda50 KM |
60 | #define SSI_NAME "ssi" |
61 | ||
ae5c3223 | 62 | struct rsnd_ssi { |
ae5c3223 KM |
63 | struct rsnd_ssi_platform_info *info; /* rcar_snd.h */ |
64 | struct rsnd_ssi *parent; | |
65 | struct rsnd_mod mod; | |
940e9479 | 66 | struct rsnd_mod *dma; |
ae5c3223 | 67 | |
ae5c3223 KM |
68 | u32 cr_own; |
69 | u32 cr_clk; | |
e7d850dd | 70 | u32 cr_mode; |
919567d9 | 71 | int chan; |
e7d850dd | 72 | int rate; |
ae5c3223 KM |
73 | int err; |
74 | unsigned int usrcnt; | |
ae5c3223 KM |
75 | }; |
76 | ||
ae5c3223 KM |
77 | #define for_each_rsnd_ssi(pos, priv, i) \ |
78 | for (i = 0; \ | |
79 | (i < rsnd_ssi_nr(priv)) && \ | |
dd27d808 | 80 | ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ |
ae5c3223 KM |
81 | i++) |
82 | ||
232c00b6 | 83 | #define rsnd_ssi_to_dma(mod) ((ssi)->dma) |
dd27d808 | 84 | #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) |
ae5c3223 | 85 | #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
6cfad789 | 86 | #define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0) |
ae5c3223 | 87 | #define rsnd_ssi_mode_flags(p) ((p)->info->flags) |
4b4dab82 | 88 | #define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id) |
e7d850dd | 89 | #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io)) |
04e627ba KM |
90 | #define rsnd_ssi_of_node(priv) \ |
91 | of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi") | |
ae5c3223 | 92 | |
b415b4d3 | 93 | int rsnd_ssi_use_busif(struct rsnd_dai_stream *io) |
d9288d0b | 94 | { |
b415b4d3 | 95 | struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io); |
d9288d0b | 96 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
d9288d0b KM |
97 | int use_busif = 0; |
98 | ||
7b466fc6 KM |
99 | if (!rsnd_ssi_is_dma_mode(mod)) |
100 | return 0; | |
101 | ||
d9288d0b KM |
102 | if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF)) |
103 | use_busif = 1; | |
104 | if (rsnd_io_to_mod_src(io)) | |
105 | use_busif = 1; | |
106 | ||
107 | return use_busif; | |
108 | } | |
109 | ||
e10369d8 KM |
110 | static void rsnd_ssi_status_clear(struct rsnd_mod *mod) |
111 | { | |
112 | rsnd_mod_write(mod, SSISR, 0); | |
113 | } | |
114 | ||
115 | static u32 rsnd_ssi_status_get(struct rsnd_mod *mod) | |
116 | { | |
117 | return rsnd_mod_read(mod, SSISR); | |
118 | } | |
119 | ||
ae5c3223 KM |
120 | static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
121 | u32 bit) | |
122 | { | |
123 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
124 | struct device *dev = rsnd_priv_to_dev(priv); | |
125 | u32 status; | |
126 | int i; | |
127 | ||
128 | for (i = 0; i < 1024; i++) { | |
e10369d8 | 129 | status = rsnd_ssi_status_get(mod); |
ae5c3223 KM |
130 | if (status & bit) |
131 | return; | |
132 | ||
133 | udelay(50); | |
134 | } | |
135 | ||
136 | dev_warn(dev, "status check failed\n"); | |
137 | } | |
138 | ||
37447b46 KM |
139 | static int rsnd_ssi_irq_enable(struct rsnd_mod *ssi_mod) |
140 | { | |
141 | struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod); | |
142 | ||
143 | if (rsnd_is_gen1(priv)) | |
144 | return 0; | |
145 | ||
146 | /* enable SSI interrupt if Gen2 */ | |
147 | rsnd_mod_write(ssi_mod, SSI_INT_ENABLE, | |
148 | rsnd_ssi_is_dma_mode(ssi_mod) ? | |
149 | 0x0e000000 : 0x0f000000); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int rsnd_ssi_irq_disable(struct rsnd_mod *ssi_mod) | |
155 | { | |
156 | struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod); | |
157 | ||
158 | if (rsnd_is_gen1(priv)) | |
159 | return 0; | |
160 | ||
161 | /* disable SSI interrupt if Gen2 */ | |
162 | rsnd_mod_write(ssi_mod, SSI_INT_ENABLE, 0x00000000); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
ae5c3223 | 167 | static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, |
adcf7d5e | 168 | struct rsnd_dai_stream *io) |
ae5c3223 | 169 | { |
1b13d118 | 170 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
adcf7d5e | 171 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
ae5c3223 | 172 | struct device *dev = rsnd_priv_to_dev(priv); |
e7d850dd | 173 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
b76e218a | 174 | struct rsnd_mod *mod = rsnd_mod_get(ssi); |
e7d850dd | 175 | struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
eae6fff4 | 176 | int j, ret; |
ae5c3223 KM |
177 | int ssi_clk_mul_table[] = { |
178 | 1, 2, 4, 8, 16, 6, 12, | |
179 | }; | |
180 | unsigned int main_rate; | |
ba9c949f | 181 | unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime); |
ae5c3223 | 182 | |
e7d850dd KM |
183 | if (!rsnd_rdai_is_clk_master(rdai)) |
184 | return 0; | |
185 | ||
186 | if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) | |
187 | return 0; | |
188 | ||
189 | if (ssi->usrcnt > 1) { | |
190 | if (ssi->rate != rate) { | |
191 | dev_err(dev, "SSI parent/child should use same rate\n"); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
ae5c3223 KM |
198 | /* |
199 | * Find best clock, and try to start ADG | |
200 | */ | |
eae6fff4 KM |
201 | for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { |
202 | ||
203 | /* | |
204 | * this driver is assuming that | |
205 | * system word is 64fs (= 2 x 32bit) | |
206 | * see rsnd_ssi_init() | |
207 | */ | |
208 | main_rate = rate * 32 * 2 * ssi_clk_mul_table[j]; | |
209 | ||
210 | ret = rsnd_adg_ssi_clk_try_start(mod, main_rate); | |
211 | if (0 == ret) { | |
212 | ssi->cr_clk = FORCE | SWL_32 | | |
213 | SCKD | SWSD | CKDV(j); | |
214 | ||
e7d850dd KM |
215 | ssi->rate = rate; |
216 | ||
217 | rsnd_mod_write(mod, SSIWSR, CONT); | |
218 | ||
eae6fff4 KM |
219 | dev_dbg(dev, "%s[%d] outputs %u Hz\n", |
220 | rsnd_mod_name(mod), | |
221 | rsnd_mod_id(mod), rate); | |
222 | ||
223 | return 0; | |
ae5c3223 KM |
224 | } |
225 | } | |
226 | ||
227 | dev_err(dev, "unsupported clock rate\n"); | |
228 | return -EIO; | |
229 | } | |
230 | ||
e7d850dd KM |
231 | static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi, |
232 | struct rsnd_dai_stream *io) | |
ae5c3223 | 233 | { |
f708d944 | 234 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
b76e218a | 235 | struct rsnd_mod *mod = rsnd_mod_get(ssi); |
e7d850dd | 236 | struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
3ba84f45 | 237 | |
e7d850dd | 238 | if (!rsnd_rdai_is_clk_master(rdai)) |
ae5c3223 | 239 | return; |
ae5c3223 | 240 | |
e7d850dd KM |
241 | if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) |
242 | return; | |
ae5c3223 | 243 | |
e7d850dd KM |
244 | if (ssi->usrcnt > 1) |
245 | return; | |
919567d9 | 246 | |
e7d850dd KM |
247 | ssi->cr_clk = 0; |
248 | ssi->rate = 0; | |
ae5c3223 | 249 | |
e7d850dd | 250 | rsnd_adg_ssi_clk_stop(mod); |
ae5c3223 KM |
251 | } |
252 | ||
253 | /* | |
254 | * SSI mod common functions | |
255 | */ | |
256 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
2c0fac19 | 257 | struct rsnd_dai_stream *io, |
690602fc | 258 | struct rsnd_priv *priv) |
ae5c3223 KM |
259 | { |
260 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
690602fc | 261 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 KM |
262 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
263 | u32 cr; | |
e7d850dd KM |
264 | int ret; |
265 | ||
266 | ssi->usrcnt++; | |
267 | ||
268 | rsnd_mod_power_on(mod); | |
269 | ||
270 | ret = rsnd_ssi_master_clk_start(ssi, io); | |
271 | if (ret < 0) | |
272 | return ret; | |
273 | ||
274 | if (rsnd_ssi_is_parent(mod, io)) | |
275 | return 0; | |
ae5c3223 KM |
276 | |
277 | cr = FORCE; | |
278 | ||
279 | /* | |
280 | * always use 32bit system word for easy clock calculation. | |
281 | * see also rsnd_ssi_master_clk_enable() | |
282 | */ | |
283 | cr |= SWL_32; | |
284 | ||
285 | /* | |
286 | * init clock settings for SSICR | |
287 | */ | |
288 | switch (runtime->sample_bits) { | |
289 | case 16: | |
290 | cr |= DWL_16; | |
291 | break; | |
292 | case 32: | |
293 | cr |= DWL_24; | |
294 | break; | |
295 | default: | |
296 | return -EIO; | |
297 | } | |
298 | ||
299 | if (rdai->bit_clk_inv) | |
300 | cr |= SCKP; | |
301 | if (rdai->frm_clk_inv) | |
302 | cr |= SWSP; | |
303 | if (rdai->data_alignment) | |
304 | cr |= SDTA; | |
305 | if (rdai->sys_delay) | |
306 | cr |= DEL; | |
985a4f6e | 307 | if (rsnd_io_is_play(io)) |
ae5c3223 KM |
308 | cr |= TRMD; |
309 | ||
ae5c3223 | 310 | ssi->cr_own = cr; |
e7d850dd KM |
311 | |
312 | if (rsnd_ssi_is_dma_mode(mod)) { | |
313 | cr = UIEN | OIEN | /* over/under run */ | |
314 | DMEN; /* DMA : enable DMA */ | |
315 | } else { | |
316 | cr = DIEN; /* PIO : enable Data interrupt */ | |
317 | } | |
318 | ||
319 | ssi->cr_mode = cr; | |
320 | ||
ae5c3223 KM |
321 | ssi->err = -1; /* ignore 1st error */ |
322 | ||
e7d850dd KM |
323 | /* clear error status */ |
324 | rsnd_ssi_status_clear(mod); | |
325 | ||
326 | rsnd_ssi_irq_enable(mod); | |
327 | ||
ae5c3223 KM |
328 | return 0; |
329 | } | |
330 | ||
331 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
2c0fac19 | 332 | struct rsnd_dai_stream *io, |
690602fc | 333 | struct rsnd_priv *priv) |
ae5c3223 KM |
334 | { |
335 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
336 | struct device *dev = rsnd_priv_to_dev(priv); |
337 | ||
e7d850dd KM |
338 | if (rsnd_ssi_is_parent(mod, io)) |
339 | goto rsnd_ssi_quit_end; | |
340 | ||
ae5c3223 | 341 | if (ssi->err > 0) |
337b0b4c KM |
342 | dev_warn(dev, "%s[%d] under/over flow err = %d\n", |
343 | rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err); | |
ae5c3223 | 344 | |
ae5c3223 KM |
345 | ssi->cr_own = 0; |
346 | ssi->err = 0; | |
347 | ||
e7d850dd KM |
348 | rsnd_ssi_irq_disable(mod); |
349 | ||
350 | rsnd_ssi_quit_end: | |
351 | rsnd_ssi_master_clk_stop(ssi, io); | |
352 | ||
353 | rsnd_mod_power_off(mod); | |
354 | ||
355 | ssi->usrcnt--; | |
356 | ||
357 | if (ssi->usrcnt < 0) | |
358 | dev_err(dev, "%s[%d] usrcnt error\n", | |
359 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
360 | ||
ae5c3223 KM |
361 | return 0; |
362 | } | |
363 | ||
919567d9 | 364 | static int rsnd_ssi_hw_params(struct rsnd_mod *mod, |
2c0fac19 | 365 | struct rsnd_dai_stream *io, |
919567d9 KM |
366 | struct snd_pcm_substream *substream, |
367 | struct snd_pcm_hw_params *params) | |
368 | { | |
369 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
919567d9 KM |
370 | int chan = params_channels(params); |
371 | ||
372 | /* | |
373 | * Already working. | |
374 | * It will happen if SSI has parent/child connection. | |
375 | */ | |
e7d850dd | 376 | if (ssi->usrcnt > 1) { |
919567d9 KM |
377 | /* |
378 | * it is error if child <-> parent SSI uses | |
379 | * different channels. | |
380 | */ | |
381 | if (ssi->chan != chan) | |
382 | return -EIO; | |
383 | } | |
384 | ||
919567d9 | 385 | ssi->chan = chan; |
919567d9 KM |
386 | |
387 | return 0; | |
388 | } | |
389 | ||
e10369d8 | 390 | static u32 rsnd_ssi_record_error(struct rsnd_ssi *ssi) |
ae5c3223 | 391 | { |
b76e218a | 392 | struct rsnd_mod *mod = rsnd_mod_get(ssi); |
e10369d8 | 393 | u32 status = rsnd_ssi_status_get(mod); |
b76e218a | 394 | |
ae5c3223 KM |
395 | /* under/over flow error */ |
396 | if (status & (UIRQ | OIRQ)) { | |
397 | ssi->err++; | |
398 | ||
399 | /* clear error status */ | |
e10369d8 | 400 | rsnd_ssi_status_clear(mod); |
ae5c3223 | 401 | } |
e10369d8 KM |
402 | |
403 | return status; | |
ae5c3223 KM |
404 | } |
405 | ||
e7d850dd KM |
406 | static int __rsnd_ssi_start(struct rsnd_mod *mod, |
407 | struct rsnd_dai_stream *io, | |
408 | struct rsnd_priv *priv) | |
409 | { | |
410 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
411 | u32 cr; | |
412 | ||
413 | cr = ssi->cr_own | | |
414 | ssi->cr_clk | | |
415 | ssi->cr_mode | | |
416 | EN; | |
417 | ||
418 | rsnd_mod_write(mod, SSICR, cr); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
4e7d606c | 423 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
2c0fac19 | 424 | struct rsnd_dai_stream *io, |
690602fc | 425 | struct rsnd_priv *priv) |
e7d850dd KM |
426 | { |
427 | /* | |
428 | * no limit to start | |
429 | * see also | |
430 | * rsnd_ssi_stop | |
431 | * rsnd_ssi_interrupt | |
432 | */ | |
433 | return __rsnd_ssi_start(mod, io, priv); | |
434 | } | |
435 | ||
436 | static int __rsnd_ssi_stop(struct rsnd_mod *mod, | |
437 | struct rsnd_dai_stream *io, | |
438 | struct rsnd_priv *priv) | |
4e7d606c KM |
439 | { |
440 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
e7d850dd KM |
441 | u32 cr; |
442 | ||
443 | /* | |
444 | * disable all IRQ, | |
445 | * and, wait all data was sent | |
446 | */ | |
447 | cr = ssi->cr_own | | |
448 | ssi->cr_clk; | |
4e7d606c | 449 | |
e7d850dd KM |
450 | rsnd_mod_write(mod, SSICR, cr | EN); |
451 | rsnd_ssi_status_check(mod, DIRQ); | |
4e7d606c | 452 | |
e7d850dd KM |
453 | /* |
454 | * disable SSI, | |
455 | * and, wait idle state | |
456 | */ | |
457 | rsnd_mod_write(mod, SSICR, cr); /* disabled all */ | |
458 | rsnd_ssi_status_check(mod, IIRQ); | |
4e7d606c KM |
459 | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static int rsnd_ssi_stop(struct rsnd_mod *mod, | |
2c0fac19 | 464 | struct rsnd_dai_stream *io, |
690602fc | 465 | struct rsnd_priv *priv) |
4e7d606c KM |
466 | { |
467 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
468 | ||
e7d850dd KM |
469 | /* |
470 | * don't stop if not last user | |
471 | * see also | |
472 | * rsnd_ssi_start | |
473 | * rsnd_ssi_interrupt | |
474 | */ | |
475 | if (ssi->usrcnt > 1) | |
476 | return 0; | |
4e7d606c | 477 | |
e7d850dd | 478 | return __rsnd_ssi_stop(mod, io, priv); |
4e7d606c KM |
479 | } |
480 | ||
bfc0cfe6 KM |
481 | static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, |
482 | struct rsnd_dai_stream *io) | |
ae5c3223 | 483 | { |
bfc0cfe6 | 484 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
690602fc | 485 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
69e32a58 | 486 | struct device *dev = rsnd_priv_to_dev(priv); |
765ae7c8 | 487 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
02299d98 | 488 | u32 status; |
75defee0 | 489 | bool elapsed = false; |
02299d98 KM |
490 | |
491 | spin_lock(&priv->lock); | |
ae5c3223 | 492 | |
02299d98 | 493 | /* ignore all cases if not working */ |
d5bbe7de | 494 | if (!rsnd_io_is_working(io)) |
02299d98 KM |
495 | goto rsnd_ssi_interrupt_out; |
496 | ||
e10369d8 | 497 | status = rsnd_ssi_record_error(ssi); |
4e7d606c KM |
498 | |
499 | /* PIO only */ | |
765ae7c8 | 500 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
501 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
502 | u32 *buf = (u32 *)(runtime->dma_area + | |
503 | rsnd_dai_pointer_offset(io, 0)); | |
504 | ||
ae5c3223 KM |
505 | /* |
506 | * 8/16/32 data can be assesse to TDR/RDR register | |
507 | * directly as 32bit data | |
508 | * see rsnd_ssi_init() | |
509 | */ | |
985a4f6e | 510 | if (rsnd_io_is_play(io)) |
4686a0ad | 511 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 512 | else |
4686a0ad | 513 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 | 514 | |
75defee0 | 515 | elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); |
4e7d606c | 516 | } |
ae5c3223 | 517 | |
12927a8f KM |
518 | /* DMA only */ |
519 | if (is_dma && (status & (UIRQ | OIRQ))) { | |
4e7d606c KM |
520 | /* |
521 | * restart SSI | |
522 | */ | |
4e7d606c KM |
523 | dev_dbg(dev, "%s[%d] restart\n", |
524 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
044930b4 | 525 | |
e7d850dd KM |
526 | __rsnd_ssi_stop(mod, io, priv); |
527 | __rsnd_ssi_start(mod, io, priv); | |
ae5c3223 KM |
528 | } |
529 | ||
69e32a58 KM |
530 | if (ssi->err > 1024) { |
531 | rsnd_ssi_irq_disable(mod); | |
532 | ||
533 | dev_warn(dev, "no more %s[%d] restart\n", | |
534 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
535 | } | |
536 | ||
02299d98 KM |
537 | rsnd_ssi_interrupt_out: |
538 | spin_unlock(&priv->lock); | |
539 | ||
75defee0 KM |
540 | if (elapsed) |
541 | rsnd_dai_period_elapsed(io); | |
bfc0cfe6 KM |
542 | } |
543 | ||
544 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) | |
545 | { | |
546 | struct rsnd_mod *mod = data; | |
547 | ||
548 | rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt); | |
75defee0 | 549 | |
4e7d606c | 550 | return IRQ_HANDLED; |
ae5c3223 KM |
551 | } |
552 | ||
6cfad789 KM |
553 | /* |
554 | * SSI PIO | |
555 | */ | |
e7d850dd KM |
556 | static void rsnd_ssi_parent_attach(struct rsnd_mod *mod, |
557 | struct rsnd_dai_stream *io, | |
558 | struct rsnd_priv *priv) | |
559 | { | |
560 | if (!__rsnd_ssi_is_pin_sharing(mod)) | |
561 | return; | |
562 | ||
563 | switch (rsnd_mod_id(mod)) { | |
564 | case 1: | |
565 | case 2: | |
566 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP); | |
567 | break; | |
568 | case 4: | |
569 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP); | |
570 | break; | |
571 | case 8: | |
572 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP); | |
573 | break; | |
574 | } | |
575 | } | |
576 | ||
c7f69ab5 KM |
577 | static int rsnd_ssi_common_probe(struct rsnd_mod *mod, |
578 | struct rsnd_dai_stream *io, | |
579 | struct rsnd_priv *priv) | |
ff8f30e6 | 580 | { |
ff8f30e6 KM |
581 | struct device *dev = rsnd_priv_to_dev(priv); |
582 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
583 | int ret; |
584 | ||
e7d850dd KM |
585 | rsnd_ssi_parent_attach(mod, io, priv); |
586 | ||
c7f69ab5 KM |
587 | ret = rsnd_ssiu_attach(io, mod); |
588 | if (ret < 0) | |
589 | return ret; | |
590 | ||
6cfad789 KM |
591 | ret = devm_request_irq(dev, ssi->info->irq, |
592 | rsnd_ssi_interrupt, | |
ff8f30e6 | 593 | IRQF_SHARED, |
bfc0cfe6 | 594 | dev_name(dev), mod); |
8aefda50 | 595 | |
ff8f30e6 KM |
596 | return ret; |
597 | } | |
598 | ||
ae5c3223 | 599 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 600 | .name = SSI_NAME, |
c7f69ab5 | 601 | .probe = rsnd_ssi_common_probe, |
ae5c3223 KM |
602 | .init = rsnd_ssi_init, |
603 | .quit = rsnd_ssi_quit, | |
49229850 KM |
604 | .start = rsnd_ssi_start, |
605 | .stop = rsnd_ssi_stop, | |
919567d9 | 606 | .hw_params = rsnd_ssi_hw_params, |
ae5c3223 KM |
607 | }; |
608 | ||
ff8f30e6 | 609 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
2c0fac19 | 610 | struct rsnd_dai_stream *io, |
690602fc | 611 | struct rsnd_priv *priv) |
ff8f30e6 | 612 | { |
ff8f30e6 | 613 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
ff8f30e6 | 614 | int dma_id = ssi->info->dma_id; |
ff8f30e6 KM |
615 | int ret; |
616 | ||
c7f69ab5 | 617 | ret = rsnd_ssi_common_probe(mod, io, priv); |
4e7d606c | 618 | if (ret) |
b543b52a | 619 | return ret; |
4e7d606c | 620 | |
81ecbb65 | 621 | ssi->dma = rsnd_dma_attach(io, mod, dma_id); |
232c00b6 KM |
622 | if (IS_ERR(ssi->dma)) |
623 | return PTR_ERR(ssi->dma); | |
8aefda50 | 624 | |
ff8f30e6 KM |
625 | return ret; |
626 | } | |
627 | ||
628 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
2c0fac19 | 629 | struct rsnd_dai_stream *io, |
690602fc | 630 | struct rsnd_priv *priv) |
97463e19 | 631 | { |
4e7d606c KM |
632 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
633 | struct device *dev = rsnd_priv_to_dev(priv); | |
6cfad789 | 634 | int irq = ssi->info->irq; |
4e7d606c | 635 | |
4e7d606c | 636 | /* PIO will request IRQ again */ |
b05ce4c0 | 637 | devm_free_irq(dev, irq, mod); |
4e7d606c | 638 | |
97463e19 KM |
639 | return 0; |
640 | } | |
641 | ||
642 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
2c0fac19 | 643 | struct rsnd_dai_stream *io, |
690602fc | 644 | struct rsnd_priv *priv) |
ff8f30e6 | 645 | { |
d3a76823 KM |
646 | struct device *dev = rsnd_priv_to_dev(priv); |
647 | ||
d3a76823 KM |
648 | /* |
649 | * fallback to PIO | |
650 | * | |
651 | * SSI .probe might be called again. | |
652 | * see | |
653 | * rsnd_rdai_continuance_probe() | |
654 | */ | |
655 | mod->ops = &rsnd_ssi_pio_ops; | |
656 | ||
657 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
658 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
659 | ||
ff8f30e6 KM |
660 | return 0; |
661 | } | |
662 | ||
9b99e9a7 KM |
663 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io, |
664 | struct rsnd_mod *mod) | |
d9288d0b | 665 | { |
72adc61f | 666 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
72adc61f KM |
667 | int is_play = rsnd_io_is_play(io); |
668 | char *name; | |
669 | ||
b415b4d3 | 670 | if (rsnd_ssi_use_busif(io)) |
72adc61f KM |
671 | name = is_play ? "rxu" : "txu"; |
672 | else | |
673 | name = is_play ? "rx" : "tx"; | |
674 | ||
675 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
676 | mod, name); | |
d9288d0b KM |
677 | } |
678 | ||
849fc82a | 679 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 680 | .name = SSI_NAME, |
72adc61f | 681 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
682 | .probe = rsnd_ssi_dma_probe, |
683 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
684 | .init = rsnd_ssi_init, |
685 | .quit = rsnd_ssi_quit, | |
497debaa KM |
686 | .start = rsnd_ssi_start, |
687 | .stop = rsnd_ssi_stop, | |
97463e19 | 688 | .fallback = rsnd_ssi_fallback, |
919567d9 | 689 | .hw_params = rsnd_ssi_hw_params, |
849fc82a KM |
690 | }; |
691 | ||
05795411 KM |
692 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
693 | { | |
694 | return mod->ops == &rsnd_ssi_dma_ops; | |
695 | } | |
696 | ||
697 | ||
ae5c3223 KM |
698 | /* |
699 | * Non SSI | |
700 | */ | |
ae5c3223 | 701 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 702 | .name = SSI_NAME, |
ae5c3223 KM |
703 | }; |
704 | ||
705 | /* | |
706 | * ssi mod function | |
707 | */ | |
708 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) | |
709 | { | |
8b14719b TI |
710 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
711 | id = 0; | |
ae5c3223 | 712 | |
b76e218a | 713 | return rsnd_mod_get((struct rsnd_ssi *)(priv->ssi) + id); |
ae5c3223 KM |
714 | } |
715 | ||
b415b4d3 | 716 | int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
7b5ce975 KM |
717 | { |
718 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
719 | ||
720 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
721 | } | |
722 | ||
90e8e50f KM |
723 | static void rsnd_of_parse_ssi(struct platform_device *pdev, |
724 | const struct rsnd_of_data *of_data, | |
725 | struct rsnd_priv *priv) | |
726 | { | |
727 | struct device_node *node; | |
728 | struct device_node *np; | |
729 | struct rsnd_ssi_platform_info *ssi_info; | |
730 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); | |
731 | struct device *dev = &pdev->dev; | |
732 | int nr, i; | |
733 | ||
04e627ba | 734 | node = rsnd_ssi_of_node(priv); |
90e8e50f KM |
735 | if (!node) |
736 | return; | |
737 | ||
738 | nr = of_get_child_count(node); | |
739 | if (!nr) | |
f451e48d | 740 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
741 | |
742 | ssi_info = devm_kzalloc(dev, | |
743 | sizeof(struct rsnd_ssi_platform_info) * nr, | |
744 | GFP_KERNEL); | |
745 | if (!ssi_info) { | |
746 | dev_err(dev, "ssi info allocation error\n"); | |
f451e48d | 747 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
748 | } |
749 | ||
750 | info->ssi_info = ssi_info; | |
751 | info->ssi_info_nr = nr; | |
752 | ||
753 | i = -1; | |
754 | for_each_child_of_node(node, np) { | |
755 | i++; | |
756 | ||
757 | ssi_info = info->ssi_info + i; | |
758 | ||
759 | /* | |
760 | * pin settings | |
761 | */ | |
762 | if (of_get_property(np, "shared-pin", NULL)) | |
763 | ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE; | |
764 | ||
765 | /* | |
766 | * irq | |
767 | */ | |
6cfad789 | 768 | ssi_info->irq = irq_of_parse_and_map(np, 0); |
199e7688 KM |
769 | |
770 | /* | |
771 | * DMA | |
772 | */ | |
773 | ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ? | |
774 | 0 : 1; | |
d9288d0b KM |
775 | |
776 | if (of_get_property(np, "no-busif", NULL)) | |
777 | ssi_info->flags |= RSND_SSI_NO_BUSIF; | |
90e8e50f | 778 | } |
f451e48d KM |
779 | |
780 | rsnd_of_parse_ssi_end: | |
781 | of_node_put(node); | |
90e8e50f KM |
782 | } |
783 | ||
ae5c3223 | 784 | int rsnd_ssi_probe(struct platform_device *pdev, |
90e8e50f | 785 | const struct rsnd_of_data *of_data, |
ae5c3223 KM |
786 | struct rsnd_priv *priv) |
787 | { | |
5da39cf3 | 788 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
ae5c3223 KM |
789 | struct rsnd_ssi_platform_info *pinfo; |
790 | struct device *dev = rsnd_priv_to_dev(priv); | |
791 | struct rsnd_mod_ops *ops; | |
792 | struct clk *clk; | |
ae5c3223 KM |
793 | struct rsnd_ssi *ssi; |
794 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 795 | int i, nr, ret; |
ae5c3223 | 796 | |
90e8e50f KM |
797 | rsnd_of_parse_ssi(pdev, of_data, priv); |
798 | ||
ae5c3223 KM |
799 | /* |
800 | * init SSI | |
801 | */ | |
802 | nr = info->ssi_info_nr; | |
dd27d808 | 803 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
afa70072 | 804 | if (!ssi) |
ae5c3223 | 805 | return -ENOMEM; |
ae5c3223 | 806 | |
dd27d808 KM |
807 | priv->ssi = ssi; |
808 | priv->ssi_nr = nr; | |
ae5c3223 KM |
809 | |
810 | for_each_rsnd_ssi(ssi, priv, i) { | |
811 | pinfo = &info->ssi_info[i]; | |
812 | ||
8aefda50 KM |
813 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
814 | SSI_NAME, i); | |
ae5c3223 | 815 | |
60dbb4f1 | 816 | clk = devm_clk_get(dev, name); |
ae5c3223 KM |
817 | if (IS_ERR(clk)) |
818 | return PTR_ERR(clk); | |
819 | ||
820 | ssi->info = pinfo; | |
ae5c3223 KM |
821 | |
822 | ops = &rsnd_ssi_non_ops; | |
ff8f30e6 KM |
823 | if (pinfo->dma_id > 0) |
824 | ops = &rsnd_ssi_dma_ops; | |
825 | else if (rsnd_ssi_pio_available(ssi)) | |
826 | ops = &rsnd_ssi_pio_ops; | |
ae5c3223 | 827 | |
b76e218a KM |
828 | ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk, |
829 | RSND_MOD_SSI, i); | |
2f78dd7f KM |
830 | if (ret) |
831 | return ret; | |
ae5c3223 KM |
832 | } |
833 | ||
ae5c3223 KM |
834 | return 0; |
835 | } | |
2f78dd7f KM |
836 | |
837 | void rsnd_ssi_remove(struct platform_device *pdev, | |
838 | struct rsnd_priv *priv) | |
839 | { | |
840 | struct rsnd_ssi *ssi; | |
841 | int i; | |
842 | ||
843 | for_each_rsnd_ssi(ssi, priv, i) { | |
b76e218a | 844 | rsnd_mod_quit(rsnd_mod_get(ssi)); |
2f78dd7f KM |
845 | } |
846 | } |