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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 */ | |
186fadc1 KM |
27 | #define CHNL_4 (1 << 22) /* Channels */ |
28 | #define CHNL_6 (2 << 22) /* Channels */ | |
29 | #define CHNL_8 (3 << 22) /* Channels */ | |
ae5c3223 KM |
30 | #define DWL_8 (0 << 19) /* Data Word Length */ |
31 | #define DWL_16 (1 << 19) /* Data Word Length */ | |
32 | #define DWL_18 (2 << 19) /* Data Word Length */ | |
33 | #define DWL_20 (3 << 19) /* Data Word Length */ | |
34 | #define DWL_22 (4 << 19) /* Data Word Length */ | |
35 | #define DWL_24 (5 << 19) /* Data Word Length */ | |
36 | #define DWL_32 (6 << 19) /* Data Word Length */ | |
37 | ||
38 | #define SWL_32 (3 << 16) /* R/W System Word Length */ | |
39 | #define SCKD (1 << 15) /* Serial Bit Clock Direction */ | |
40 | #define SWSD (1 << 14) /* Serial WS Direction */ | |
41 | #define SCKP (1 << 13) /* Serial Bit Clock Polarity */ | |
42 | #define SWSP (1 << 12) /* Serial WS Polarity */ | |
43 | #define SDTA (1 << 10) /* Serial Data Alignment */ | |
f46a93b8 | 44 | #define PDTA (1 << 9) /* Parallel Data Alignment */ |
ae5c3223 KM |
45 | #define DEL (1 << 8) /* Serial Data Delay */ |
46 | #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */ | |
47 | #define TRMD (1 << 1) /* Transmit/Receive Mode Select */ | |
48 | #define EN (1 << 0) /* SSI Module Enable */ | |
49 | ||
50 | /* | |
51 | * SSISR | |
52 | */ | |
53 | #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */ | |
54 | #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */ | |
55 | #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */ | |
56 | #define DIRQ (1 << 24) /* Data Interrupt Status Flag */ | |
57 | ||
849fc82a KM |
58 | /* |
59 | * SSIWSR | |
60 | */ | |
61 | #define CONT (1 << 8) /* WS Continue Function */ | |
186fadc1 | 62 | #define WS_MODE (1 << 0) /* WS Mode */ |
849fc82a | 63 | |
8aefda50 KM |
64 | #define SSI_NAME "ssi" |
65 | ||
ae5c3223 | 66 | struct rsnd_ssi { |
ae5c3223 | 67 | struct rsnd_mod mod; |
940e9479 | 68 | struct rsnd_mod *dma; |
ae5c3223 | 69 | |
02534f2f | 70 | u32 flags; |
ae5c3223 KM |
71 | u32 cr_own; |
72 | u32 cr_clk; | |
e7d850dd | 73 | u32 cr_mode; |
08bada26 | 74 | u32 wsr; |
919567d9 | 75 | int chan; |
e7d850dd | 76 | int rate; |
02534f2f | 77 | int irq; |
ae5c3223 | 78 | unsigned int usrcnt; |
ae5c3223 KM |
79 | }; |
80 | ||
02534f2f KM |
81 | /* flags */ |
82 | #define RSND_SSI_CLK_PIN_SHARE (1 << 0) | |
83 | #define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */ | |
84 | ||
ae5c3223 KM |
85 | #define for_each_rsnd_ssi(pos, priv, i) \ |
86 | for (i = 0; \ | |
87 | (i < rsnd_ssi_nr(priv)) && \ | |
dd27d808 | 88 | ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ |
ae5c3223 KM |
89 | i++) |
90 | ||
02534f2f | 91 | #define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id) |
232c00b6 | 92 | #define rsnd_ssi_to_dma(mod) ((ssi)->dma) |
dd27d808 | 93 | #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) |
ae5c3223 | 94 | #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
02534f2f | 95 | #define rsnd_ssi_mode_flags(p) ((p)->flags) |
e7d850dd | 96 | #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io)) |
c308abe4 KM |
97 | #define rsnd_ssi_is_multi_slave(mod, io) \ |
98 | (rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod))) | |
ae5c3223 | 99 | |
b415b4d3 | 100 | int rsnd_ssi_use_busif(struct rsnd_dai_stream *io) |
d9288d0b | 101 | { |
b415b4d3 | 102 | struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io); |
d9288d0b | 103 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
d9288d0b KM |
104 | int use_busif = 0; |
105 | ||
7b466fc6 KM |
106 | if (!rsnd_ssi_is_dma_mode(mod)) |
107 | return 0; | |
108 | ||
d9288d0b KM |
109 | if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF)) |
110 | use_busif = 1; | |
111 | if (rsnd_io_to_mod_src(io)) | |
112 | use_busif = 1; | |
113 | ||
114 | return use_busif; | |
115 | } | |
116 | ||
e10369d8 KM |
117 | static void rsnd_ssi_status_clear(struct rsnd_mod *mod) |
118 | { | |
119 | rsnd_mod_write(mod, SSISR, 0); | |
120 | } | |
121 | ||
122 | static u32 rsnd_ssi_status_get(struct rsnd_mod *mod) | |
123 | { | |
124 | return rsnd_mod_read(mod, SSISR); | |
125 | } | |
126 | ||
ae5c3223 KM |
127 | static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
128 | u32 bit) | |
129 | { | |
130 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
131 | struct device *dev = rsnd_priv_to_dev(priv); | |
132 | u32 status; | |
133 | int i; | |
134 | ||
135 | for (i = 0; i < 1024; i++) { | |
e10369d8 | 136 | status = rsnd_ssi_status_get(mod); |
ae5c3223 KM |
137 | if (status & bit) |
138 | return; | |
139 | ||
140 | udelay(50); | |
141 | } | |
142 | ||
1120dbff KM |
143 | dev_warn(dev, "%s[%d] status check failed\n", |
144 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
ae5c3223 KM |
145 | } |
146 | ||
b5b442ab KM |
147 | static int rsnd_ssi_irq(struct rsnd_mod *mod, |
148 | struct rsnd_dai_stream *io, | |
149 | struct rsnd_priv *priv, | |
150 | int enable) | |
37447b46 | 151 | { |
b5b442ab KM |
152 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
153 | u32 val = 0; | |
37447b46 KM |
154 | |
155 | if (rsnd_is_gen1(priv)) | |
156 | return 0; | |
157 | ||
b5b442ab | 158 | if (ssi->usrcnt != 1) |
37447b46 KM |
159 | return 0; |
160 | ||
b5b442ab KM |
161 | if (enable) |
162 | val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000; | |
163 | ||
164 | rsnd_mod_write(mod, SSI_INT_ENABLE, val); | |
37447b46 KM |
165 | |
166 | return 0; | |
167 | } | |
168 | ||
b4c83b17 KM |
169 | u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io) |
170 | { | |
171 | struct rsnd_mod *mod; | |
b4c83b17 KM |
172 | enum rsnd_mod_type types[] = { |
173 | RSND_MOD_SSIM1, | |
174 | RSND_MOD_SSIM2, | |
175 | RSND_MOD_SSIM3, | |
176 | }; | |
177 | int i, mask; | |
178 | ||
b4c83b17 KM |
179 | mask = 0; |
180 | for (i = 0; i < ARRAY_SIZE(types); i++) { | |
181 | mod = rsnd_io_to_mod(io, types[i]); | |
182 | if (!mod) | |
183 | continue; | |
184 | ||
185 | mask |= 1 << rsnd_mod_id(mod); | |
186 | } | |
187 | ||
188 | return mask; | |
189 | } | |
190 | ||
ae5c3223 | 191 | static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, |
adcf7d5e | 192 | struct rsnd_dai_stream *io) |
ae5c3223 | 193 | { |
1b13d118 | 194 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
adcf7d5e | 195 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
ae5c3223 | 196 | struct device *dev = rsnd_priv_to_dev(priv); |
e7d850dd | 197 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
b76e218a | 198 | struct rsnd_mod *mod = rsnd_mod_get(ssi); |
e7d850dd | 199 | struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
c140284b | 200 | int slots = rsnd_get_slot_width(io); |
eae6fff4 | 201 | int j, ret; |
ae5c3223 KM |
202 | int ssi_clk_mul_table[] = { |
203 | 1, 2, 4, 8, 16, 6, 12, | |
204 | }; | |
205 | unsigned int main_rate; | |
ba9c949f | 206 | unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime); |
ae5c3223 | 207 | |
e7d850dd KM |
208 | if (!rsnd_rdai_is_clk_master(rdai)) |
209 | return 0; | |
210 | ||
211 | if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) | |
212 | return 0; | |
213 | ||
b4c83b17 KM |
214 | if (rsnd_ssi_is_multi_slave(mod, io)) |
215 | return 0; | |
216 | ||
e7d850dd KM |
217 | if (ssi->usrcnt > 1) { |
218 | if (ssi->rate != rate) { | |
219 | dev_err(dev, "SSI parent/child should use same rate\n"); | |
220 | return -EINVAL; | |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
ae5c3223 KM |
226 | /* |
227 | * Find best clock, and try to start ADG | |
228 | */ | |
eae6fff4 KM |
229 | for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { |
230 | ||
231 | /* | |
232 | * this driver is assuming that | |
8ec85e7f | 233 | * system word is 32bit x slots |
eae6fff4 KM |
234 | * see rsnd_ssi_init() |
235 | */ | |
8ec85e7f | 236 | main_rate = rate * 32 * slots * ssi_clk_mul_table[j]; |
eae6fff4 KM |
237 | |
238 | ret = rsnd_adg_ssi_clk_try_start(mod, main_rate); | |
239 | if (0 == ret) { | |
240 | ssi->cr_clk = FORCE | SWL_32 | | |
241 | SCKD | SWSD | CKDV(j); | |
08bada26 | 242 | ssi->wsr = CONT; |
eae6fff4 | 243 | |
e7d850dd KM |
244 | ssi->rate = rate; |
245 | ||
eae6fff4 KM |
246 | dev_dbg(dev, "%s[%d] outputs %u Hz\n", |
247 | rsnd_mod_name(mod), | |
248 | rsnd_mod_id(mod), rate); | |
249 | ||
250 | return 0; | |
ae5c3223 KM |
251 | } |
252 | } | |
253 | ||
254 | dev_err(dev, "unsupported clock rate\n"); | |
255 | return -EIO; | |
256 | } | |
257 | ||
e7d850dd KM |
258 | static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi, |
259 | struct rsnd_dai_stream *io) | |
ae5c3223 | 260 | { |
f708d944 | 261 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
b76e218a | 262 | struct rsnd_mod *mod = rsnd_mod_get(ssi); |
e7d850dd | 263 | struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
3ba84f45 | 264 | |
e7d850dd | 265 | if (!rsnd_rdai_is_clk_master(rdai)) |
ae5c3223 | 266 | return; |
ae5c3223 | 267 | |
e7d850dd KM |
268 | if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) |
269 | return; | |
ae5c3223 | 270 | |
e7d850dd KM |
271 | if (ssi->usrcnt > 1) |
272 | return; | |
919567d9 | 273 | |
e7d850dd KM |
274 | ssi->cr_clk = 0; |
275 | ssi->rate = 0; | |
ae5c3223 | 276 | |
e7d850dd | 277 | rsnd_adg_ssi_clk_stop(mod); |
ae5c3223 KM |
278 | } |
279 | ||
840ada3b KM |
280 | static int rsnd_ssi_config_init(struct rsnd_ssi *ssi, |
281 | struct rsnd_dai_stream *io) | |
282 | { | |
283 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
284 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); | |
285 | u32 cr_own; | |
286 | u32 cr_mode; | |
186fadc1 | 287 | u32 wsr; |
f98ed119 KM |
288 | int is_tdm; |
289 | ||
c140284b | 290 | is_tdm = (rsnd_get_slot_width(io) >= 6) ? 1 : 0; |
840ada3b KM |
291 | |
292 | /* | |
293 | * always use 32bit system word. | |
294 | * see also rsnd_ssi_master_clk_enable() | |
295 | */ | |
296 | cr_own = FORCE | SWL_32 | PDTA; | |
297 | ||
298 | if (rdai->bit_clk_inv) | |
299 | cr_own |= SCKP; | |
f98ed119 | 300 | if (rdai->frm_clk_inv ^ is_tdm) |
840ada3b KM |
301 | cr_own |= SWSP; |
302 | if (rdai->data_alignment) | |
303 | cr_own |= SDTA; | |
304 | if (rdai->sys_delay) | |
305 | cr_own |= DEL; | |
306 | if (rsnd_io_is_play(io)) | |
307 | cr_own |= TRMD; | |
308 | ||
309 | switch (runtime->sample_bits) { | |
310 | case 16: | |
311 | cr_own |= DWL_16; | |
312 | break; | |
313 | case 32: | |
314 | cr_own |= DWL_24; | |
315 | break; | |
316 | default: | |
317 | return -EINVAL; | |
318 | } | |
319 | ||
320 | if (rsnd_ssi_is_dma_mode(rsnd_mod_get(ssi))) { | |
321 | cr_mode = UIEN | OIEN | /* over/under run */ | |
322 | DMEN; /* DMA : enable DMA */ | |
323 | } else { | |
324 | cr_mode = DIEN; /* PIO : enable Data interrupt */ | |
325 | } | |
326 | ||
186fadc1 KM |
327 | /* |
328 | * TDM Extend Mode | |
329 | * see | |
330 | * rsnd_ssiu_init_gen2() | |
331 | */ | |
332 | wsr = ssi->wsr; | |
f98ed119 | 333 | if (is_tdm) { |
186fadc1 KM |
334 | wsr |= WS_MODE; |
335 | cr_own |= CHNL_8; | |
336 | } | |
337 | ||
840ada3b KM |
338 | ssi->cr_own = cr_own; |
339 | ssi->cr_mode = cr_mode; | |
186fadc1 | 340 | ssi->wsr = wsr; |
840ada3b KM |
341 | |
342 | return 0; | |
343 | } | |
344 | ||
ae5c3223 KM |
345 | /* |
346 | * SSI mod common functions | |
347 | */ | |
348 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
2c0fac19 | 349 | struct rsnd_dai_stream *io, |
690602fc | 350 | struct rsnd_priv *priv) |
ae5c3223 KM |
351 | { |
352 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
e7d850dd KM |
353 | int ret; |
354 | ||
355 | ssi->usrcnt++; | |
356 | ||
357 | rsnd_mod_power_on(mod); | |
358 | ||
359 | ret = rsnd_ssi_master_clk_start(ssi, io); | |
360 | if (ret < 0) | |
361 | return ret; | |
362 | ||
363 | if (rsnd_ssi_is_parent(mod, io)) | |
364 | return 0; | |
ae5c3223 | 365 | |
840ada3b KM |
366 | ret = rsnd_ssi_config_init(ssi, io); |
367 | if (ret < 0) | |
368 | return ret; | |
e7d850dd | 369 | |
e7d850dd KM |
370 | /* clear error status */ |
371 | rsnd_ssi_status_clear(mod); | |
372 | ||
ae5c3223 KM |
373 | return 0; |
374 | } | |
375 | ||
376 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
2c0fac19 | 377 | struct rsnd_dai_stream *io, |
690602fc | 378 | struct rsnd_priv *priv) |
ae5c3223 KM |
379 | { |
380 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
381 | struct device *dev = rsnd_priv_to_dev(priv); |
382 | ||
e5d9cfc6 AH |
383 | if (!ssi->usrcnt) { |
384 | dev_err(dev, "%s[%d] usrcnt error\n", | |
385 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
386 | return -EIO; | |
387 | } | |
e7d850dd | 388 | |
b5b442ab | 389 | if (!rsnd_ssi_is_parent(mod, io)) |
e5d9cfc6 | 390 | ssi->cr_own = 0; |
ae5c3223 | 391 | |
e7d850dd KM |
392 | rsnd_ssi_master_clk_stop(ssi, io); |
393 | ||
394 | rsnd_mod_power_off(mod); | |
395 | ||
396 | ssi->usrcnt--; | |
397 | ||
ae5c3223 KM |
398 | return 0; |
399 | } | |
400 | ||
919567d9 | 401 | static int rsnd_ssi_hw_params(struct rsnd_mod *mod, |
2c0fac19 | 402 | struct rsnd_dai_stream *io, |
919567d9 KM |
403 | struct snd_pcm_substream *substream, |
404 | struct snd_pcm_hw_params *params) | |
405 | { | |
406 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
919567d9 KM |
407 | int chan = params_channels(params); |
408 | ||
409 | /* | |
410 | * Already working. | |
411 | * It will happen if SSI has parent/child connection. | |
412 | */ | |
e7d850dd | 413 | if (ssi->usrcnt > 1) { |
919567d9 KM |
414 | /* |
415 | * it is error if child <-> parent SSI uses | |
416 | * different channels. | |
417 | */ | |
418 | if (ssi->chan != chan) | |
419 | return -EIO; | |
420 | } | |
421 | ||
919567d9 | 422 | ssi->chan = chan; |
919567d9 KM |
423 | |
424 | return 0; | |
425 | } | |
426 | ||
6a25c8da KM |
427 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
428 | struct rsnd_dai_stream *io, | |
429 | struct rsnd_priv *priv) | |
e7d850dd KM |
430 | { |
431 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
432 | u32 cr; | |
433 | ||
434 | cr = ssi->cr_own | | |
435 | ssi->cr_clk | | |
b4c83b17 KM |
436 | ssi->cr_mode; |
437 | ||
438 | /* | |
439 | * EN will be set via SSIU :: SSI_CONTROL | |
440 | * if Multi channel mode | |
441 | */ | |
442 | if (!rsnd_ssi_multi_slaves(io)) | |
443 | cr |= EN; | |
e7d850dd KM |
444 | |
445 | rsnd_mod_write(mod, SSICR, cr); | |
08bada26 | 446 | rsnd_mod_write(mod, SSIWSR, ssi->wsr); |
e7d850dd KM |
447 | |
448 | return 0; | |
449 | } | |
450 | ||
6a25c8da KM |
451 | static int rsnd_ssi_stop(struct rsnd_mod *mod, |
452 | struct rsnd_dai_stream *io, | |
453 | struct rsnd_priv *priv) | |
e7d850dd | 454 | { |
6a25c8da KM |
455 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
456 | u32 cr; | |
457 | ||
e7d850dd | 458 | /* |
6a25c8da | 459 | * don't stop if not last user |
e7d850dd | 460 | * see also |
6a25c8da | 461 | * rsnd_ssi_start |
e7d850dd KM |
462 | * rsnd_ssi_interrupt |
463 | */ | |
6a25c8da KM |
464 | if (ssi->usrcnt > 1) |
465 | return 0; | |
e7d850dd KM |
466 | |
467 | /* | |
468 | * disable all IRQ, | |
469 | * and, wait all data was sent | |
470 | */ | |
471 | cr = ssi->cr_own | | |
472 | ssi->cr_clk; | |
4e7d606c | 473 | |
e7d850dd KM |
474 | rsnd_mod_write(mod, SSICR, cr | EN); |
475 | rsnd_ssi_status_check(mod, DIRQ); | |
4e7d606c | 476 | |
e7d850dd KM |
477 | /* |
478 | * disable SSI, | |
479 | * and, wait idle state | |
480 | */ | |
481 | rsnd_mod_write(mod, SSICR, cr); /* disabled all */ | |
482 | rsnd_ssi_status_check(mod, IIRQ); | |
4e7d606c KM |
483 | |
484 | return 0; | |
485 | } | |
486 | ||
bfc0cfe6 KM |
487 | static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, |
488 | struct rsnd_dai_stream *io) | |
ae5c3223 | 489 | { |
690602fc | 490 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
765ae7c8 | 491 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
02299d98 | 492 | u32 status; |
75defee0 | 493 | bool elapsed = false; |
6a25c8da | 494 | bool stop = false; |
02299d98 KM |
495 | |
496 | spin_lock(&priv->lock); | |
ae5c3223 | 497 | |
02299d98 | 498 | /* ignore all cases if not working */ |
d5bbe7de | 499 | if (!rsnd_io_is_working(io)) |
02299d98 KM |
500 | goto rsnd_ssi_interrupt_out; |
501 | ||
6a25c8da | 502 | status = rsnd_ssi_status_get(mod); |
4e7d606c KM |
503 | |
504 | /* PIO only */ | |
765ae7c8 | 505 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
506 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
507 | u32 *buf = (u32 *)(runtime->dma_area + | |
508 | rsnd_dai_pointer_offset(io, 0)); | |
509 | ||
ae5c3223 KM |
510 | /* |
511 | * 8/16/32 data can be assesse to TDR/RDR register | |
512 | * directly as 32bit data | |
513 | * see rsnd_ssi_init() | |
514 | */ | |
985a4f6e | 515 | if (rsnd_io_is_play(io)) |
4686a0ad | 516 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 517 | else |
4686a0ad | 518 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 | 519 | |
75defee0 | 520 | elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); |
4e7d606c | 521 | } |
ae5c3223 | 522 | |
12927a8f | 523 | /* DMA only */ |
6a25c8da KM |
524 | if (is_dma && (status & (UIRQ | OIRQ))) |
525 | stop = true; | |
69e32a58 | 526 | |
5342dff2 | 527 | rsnd_ssi_status_clear(mod); |
02299d98 KM |
528 | rsnd_ssi_interrupt_out: |
529 | spin_unlock(&priv->lock); | |
530 | ||
75defee0 KM |
531 | if (elapsed) |
532 | rsnd_dai_period_elapsed(io); | |
6a25c8da KM |
533 | |
534 | if (stop) | |
535 | snd_pcm_stop_xrun(io->substream); | |
536 | ||
bfc0cfe6 KM |
537 | } |
538 | ||
539 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) | |
540 | { | |
541 | struct rsnd_mod *mod = data; | |
542 | ||
543 | rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt); | |
75defee0 | 544 | |
4e7d606c | 545 | return IRQ_HANDLED; |
ae5c3223 KM |
546 | } |
547 | ||
6cfad789 KM |
548 | /* |
549 | * SSI PIO | |
550 | */ | |
e7d850dd KM |
551 | static void rsnd_ssi_parent_attach(struct rsnd_mod *mod, |
552 | struct rsnd_dai_stream *io, | |
553 | struct rsnd_priv *priv) | |
554 | { | |
555 | if (!__rsnd_ssi_is_pin_sharing(mod)) | |
556 | return; | |
557 | ||
558 | switch (rsnd_mod_id(mod)) { | |
559 | case 1: | |
560 | case 2: | |
561 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP); | |
562 | break; | |
563 | case 4: | |
564 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP); | |
565 | break; | |
566 | case 8: | |
567 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP); | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
c7f69ab5 KM |
572 | static int rsnd_ssi_common_probe(struct rsnd_mod *mod, |
573 | struct rsnd_dai_stream *io, | |
574 | struct rsnd_priv *priv) | |
ff8f30e6 | 575 | { |
ff8f30e6 KM |
576 | struct device *dev = rsnd_priv_to_dev(priv); |
577 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
578 | int ret; |
579 | ||
b4c83b17 KM |
580 | /* |
581 | * SSIP/SSIU/IRQ are not needed on | |
582 | * SSI Multi slaves | |
583 | */ | |
584 | if (rsnd_ssi_is_multi_slave(mod, io)) | |
585 | return 0; | |
586 | ||
e7d850dd KM |
587 | rsnd_ssi_parent_attach(mod, io, priv); |
588 | ||
c7f69ab5 KM |
589 | ret = rsnd_ssiu_attach(io, mod); |
590 | if (ret < 0) | |
591 | return ret; | |
592 | ||
02534f2f | 593 | ret = devm_request_irq(dev, ssi->irq, |
6cfad789 | 594 | rsnd_ssi_interrupt, |
ff8f30e6 | 595 | IRQF_SHARED, |
bfc0cfe6 | 596 | dev_name(dev), mod); |
8aefda50 | 597 | |
ff8f30e6 KM |
598 | return ret; |
599 | } | |
600 | ||
ae5c3223 | 601 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 602 | .name = SSI_NAME, |
c7f69ab5 | 603 | .probe = rsnd_ssi_common_probe, |
ae5c3223 KM |
604 | .init = rsnd_ssi_init, |
605 | .quit = rsnd_ssi_quit, | |
49229850 KM |
606 | .start = rsnd_ssi_start, |
607 | .stop = rsnd_ssi_stop, | |
b5b442ab | 608 | .irq = rsnd_ssi_irq, |
919567d9 | 609 | .hw_params = rsnd_ssi_hw_params, |
ae5c3223 KM |
610 | }; |
611 | ||
ff8f30e6 | 612 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
2c0fac19 | 613 | struct rsnd_dai_stream *io, |
690602fc | 614 | struct rsnd_priv *priv) |
ff8f30e6 | 615 | { |
ff8f30e6 | 616 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
02534f2f | 617 | int dma_id = 0; /* not needed */ |
ff8f30e6 KM |
618 | int ret; |
619 | ||
b4c83b17 KM |
620 | /* |
621 | * SSIP/SSIU/IRQ/DMA are not needed on | |
622 | * SSI Multi slaves | |
623 | */ | |
624 | if (rsnd_ssi_is_multi_slave(mod, io)) | |
625 | return 0; | |
626 | ||
c7f69ab5 | 627 | ret = rsnd_ssi_common_probe(mod, io, priv); |
4e7d606c | 628 | if (ret) |
b543b52a | 629 | return ret; |
4e7d606c | 630 | |
355cb84f KM |
631 | /* SSI probe might be called many times in MUX multi path */ |
632 | ret = rsnd_dma_attach(io, mod, &ssi->dma, dma_id); | |
8aefda50 | 633 | |
ff8f30e6 KM |
634 | return ret; |
635 | } | |
636 | ||
637 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
2c0fac19 | 638 | struct rsnd_dai_stream *io, |
690602fc | 639 | struct rsnd_priv *priv) |
97463e19 | 640 | { |
4e7d606c KM |
641 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
642 | struct device *dev = rsnd_priv_to_dev(priv); | |
02534f2f | 643 | int irq = ssi->irq; |
4e7d606c | 644 | |
4e7d606c | 645 | /* PIO will request IRQ again */ |
b05ce4c0 | 646 | devm_free_irq(dev, irq, mod); |
4e7d606c | 647 | |
97463e19 KM |
648 | return 0; |
649 | } | |
650 | ||
651 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
2c0fac19 | 652 | struct rsnd_dai_stream *io, |
690602fc | 653 | struct rsnd_priv *priv) |
ff8f30e6 | 654 | { |
d3a76823 KM |
655 | struct device *dev = rsnd_priv_to_dev(priv); |
656 | ||
d3a76823 KM |
657 | /* |
658 | * fallback to PIO | |
659 | * | |
660 | * SSI .probe might be called again. | |
661 | * see | |
662 | * rsnd_rdai_continuance_probe() | |
663 | */ | |
664 | mod->ops = &rsnd_ssi_pio_ops; | |
665 | ||
666 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
667 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
668 | ||
ff8f30e6 KM |
669 | return 0; |
670 | } | |
671 | ||
9b99e9a7 KM |
672 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io, |
673 | struct rsnd_mod *mod) | |
d9288d0b | 674 | { |
72adc61f | 675 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
72adc61f KM |
676 | int is_play = rsnd_io_is_play(io); |
677 | char *name; | |
678 | ||
b415b4d3 | 679 | if (rsnd_ssi_use_busif(io)) |
72adc61f KM |
680 | name = is_play ? "rxu" : "txu"; |
681 | else | |
682 | name = is_play ? "rx" : "tx"; | |
683 | ||
684 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
685 | mod, name); | |
d9288d0b KM |
686 | } |
687 | ||
849fc82a | 688 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 689 | .name = SSI_NAME, |
72adc61f | 690 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
691 | .probe = rsnd_ssi_dma_probe, |
692 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
693 | .init = rsnd_ssi_init, |
694 | .quit = rsnd_ssi_quit, | |
497debaa KM |
695 | .start = rsnd_ssi_start, |
696 | .stop = rsnd_ssi_stop, | |
97463e19 | 697 | .fallback = rsnd_ssi_fallback, |
919567d9 | 698 | .hw_params = rsnd_ssi_hw_params, |
849fc82a KM |
699 | }; |
700 | ||
05795411 KM |
701 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
702 | { | |
703 | return mod->ops == &rsnd_ssi_dma_ops; | |
704 | } | |
705 | ||
706 | ||
ae5c3223 KM |
707 | /* |
708 | * Non SSI | |
709 | */ | |
ae5c3223 | 710 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 711 | .name = SSI_NAME, |
ae5c3223 KM |
712 | }; |
713 | ||
714 | /* | |
715 | * ssi mod function | |
716 | */ | |
b4c83b17 KM |
717 | static void rsnd_ssi_connect(struct rsnd_mod *mod, |
718 | struct rsnd_dai_stream *io) | |
719 | { | |
720 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
721 | enum rsnd_mod_type types[] = { | |
722 | RSND_MOD_SSI, | |
723 | RSND_MOD_SSIM1, | |
724 | RSND_MOD_SSIM2, | |
725 | RSND_MOD_SSIM3, | |
726 | }; | |
727 | enum rsnd_mod_type type; | |
728 | int i; | |
729 | ||
730 | /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */ | |
731 | for (i = 0; i < ARRAY_SIZE(types); i++) { | |
732 | type = types[i]; | |
733 | if (!rsnd_io_to_mod(io, type)) { | |
734 | rsnd_dai_connect(mod, io, type); | |
735 | rsnd_set_slot(rdai, 2 * (i + 1), (i + 1)); | |
736 | return; | |
737 | } | |
738 | } | |
739 | } | |
740 | ||
741 | void rsnd_parse_connect_ssi(struct rsnd_dai *rdai, | |
742 | struct device_node *playback, | |
743 | struct device_node *capture) | |
744 | { | |
745 | struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); | |
746 | struct device_node *node; | |
747 | struct device_node *np; | |
748 | struct rsnd_mod *mod; | |
749 | int i; | |
750 | ||
751 | node = rsnd_ssi_of_node(priv); | |
752 | if (!node) | |
753 | return; | |
754 | ||
755 | i = 0; | |
756 | for_each_child_of_node(node, np) { | |
757 | mod = rsnd_ssi_mod_get(priv, i); | |
758 | if (np == playback) | |
759 | rsnd_ssi_connect(mod, &rdai->playback); | |
760 | if (np == capture) | |
761 | rsnd_ssi_connect(mod, &rdai->capture); | |
762 | i++; | |
763 | } | |
764 | ||
765 | of_node_put(node); | |
766 | } | |
767 | ||
ae5c3223 KM |
768 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) |
769 | { | |
8b14719b TI |
770 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
771 | id = 0; | |
ae5c3223 | 772 | |
02534f2f | 773 | return rsnd_mod_get(rsnd_ssi_get(priv, id)); |
ae5c3223 KM |
774 | } |
775 | ||
b415b4d3 | 776 | int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
7b5ce975 KM |
777 | { |
778 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
779 | ||
780 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
781 | } | |
782 | ||
5ba17b42 KM |
783 | static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io, |
784 | struct rsnd_mod *mod, | |
785 | enum rsnd_mod_type type) | |
786 | { | |
787 | /* | |
788 | * SSIP (= SSI parent) needs to be special, otherwise, | |
789 | * 2nd SSI might doesn't start. see also rsnd_mod_call() | |
790 | * | |
791 | * We can't include parent SSI status on SSI, because we don't know | |
792 | * how many SSI requests parent SSI. Thus, it is localed on "io" now. | |
793 | * ex) trouble case | |
794 | * Playback: SSI0 | |
795 | * Capture : SSI1 (needs SSI0) | |
796 | * | |
797 | * 1) start Capture -> SSI0/SSI1 are started. | |
798 | * 2) start Playback -> SSI0 doesn't work, because it is already | |
799 | * marked as "started" on 1) | |
800 | * | |
801 | * OTOH, using each mod's status is good for MUX case. | |
802 | * It doesn't need to start in 2nd start | |
803 | * ex) | |
804 | * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0 | |
805 | * | | |
806 | * IO-1: SRC1 -> CTU2 -+ | |
807 | * | |
808 | * 1) start IO-0 -> start SSI0 | |
809 | * 2) start IO-1 -> SSI0 doesn't need to start, because it is | |
810 | * already started on 1) | |
811 | */ | |
812 | if (type == RSND_MOD_SSIP) | |
813 | return &io->parent_ssi_status; | |
814 | ||
815 | return rsnd_mod_get_status(io, mod, type); | |
816 | } | |
817 | ||
2ea6b074 | 818 | int rsnd_ssi_probe(struct rsnd_priv *priv) |
ae5c3223 | 819 | { |
02534f2f KM |
820 | struct device_node *node; |
821 | struct device_node *np; | |
ae5c3223 KM |
822 | struct device *dev = rsnd_priv_to_dev(priv); |
823 | struct rsnd_mod_ops *ops; | |
824 | struct clk *clk; | |
ae5c3223 KM |
825 | struct rsnd_ssi *ssi; |
826 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 827 | int i, nr, ret; |
ae5c3223 | 828 | |
02534f2f KM |
829 | node = rsnd_ssi_of_node(priv); |
830 | if (!node) | |
831 | return -EINVAL; | |
832 | ||
833 | nr = of_get_child_count(node); | |
834 | if (!nr) { | |
835 | ret = -EINVAL; | |
836 | goto rsnd_ssi_probe_done; | |
837 | } | |
90e8e50f | 838 | |
dd27d808 | 839 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
02534f2f KM |
840 | if (!ssi) { |
841 | ret = -ENOMEM; | |
842 | goto rsnd_ssi_probe_done; | |
843 | } | |
ae5c3223 | 844 | |
dd27d808 KM |
845 | priv->ssi = ssi; |
846 | priv->ssi_nr = nr; | |
ae5c3223 | 847 | |
02534f2f KM |
848 | i = 0; |
849 | for_each_child_of_node(node, np) { | |
850 | ssi = rsnd_ssi_get(priv, i); | |
ae5c3223 | 851 | |
8aefda50 KM |
852 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
853 | SSI_NAME, i); | |
ae5c3223 | 854 | |
60dbb4f1 | 855 | clk = devm_clk_get(dev, name); |
02534f2f KM |
856 | if (IS_ERR(clk)) { |
857 | ret = PTR_ERR(clk); | |
858 | goto rsnd_ssi_probe_done; | |
859 | } | |
ae5c3223 | 860 | |
02534f2f KM |
861 | if (of_get_property(np, "shared-pin", NULL)) |
862 | ssi->flags |= RSND_SSI_CLK_PIN_SHARE; | |
863 | ||
864 | if (of_get_property(np, "no-busif", NULL)) | |
865 | ssi->flags |= RSND_SSI_NO_BUSIF; | |
866 | ||
867 | ssi->irq = irq_of_parse_and_map(np, 0); | |
868 | if (!ssi->irq) { | |
869 | ret = -EINVAL; | |
870 | goto rsnd_ssi_probe_done; | |
871 | } | |
ae5c3223 KM |
872 | |
873 | ops = &rsnd_ssi_non_ops; | |
02534f2f | 874 | if (of_get_property(np, "pio-transfer", NULL)) |
ff8f30e6 | 875 | ops = &rsnd_ssi_pio_ops; |
02534f2f KM |
876 | else |
877 | ops = &rsnd_ssi_dma_ops; | |
ae5c3223 | 878 | |
b76e218a | 879 | ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk, |
5ba17b42 | 880 | rsnd_ssi_get_status, RSND_MOD_SSI, i); |
2f78dd7f | 881 | if (ret) |
02534f2f KM |
882 | goto rsnd_ssi_probe_done; |
883 | ||
884 | i++; | |
ae5c3223 KM |
885 | } |
886 | ||
02534f2f KM |
887 | ret = 0; |
888 | ||
889 | rsnd_ssi_probe_done: | |
890 | of_node_put(node); | |
891 | ||
892 | return ret; | |
ae5c3223 | 893 | } |
2f78dd7f | 894 | |
2ea6b074 | 895 | void rsnd_ssi_remove(struct rsnd_priv *priv) |
2f78dd7f KM |
896 | { |
897 | struct rsnd_ssi *ssi; | |
898 | int i; | |
899 | ||
900 | for_each_rsnd_ssi(ssi, priv, i) { | |
b76e218a | 901 | rsnd_mod_quit(rsnd_mod_get(ssi)); |
2f78dd7f KM |
902 | } |
903 | } |