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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; | |
66 | ||
ae5c3223 KM |
67 | u32 cr_own; |
68 | u32 cr_clk; | |
ae5c3223 KM |
69 | int err; |
70 | unsigned int usrcnt; | |
ae5c3223 KM |
71 | }; |
72 | ||
ae5c3223 KM |
73 | #define for_each_rsnd_ssi(pos, priv, i) \ |
74 | for (i = 0; \ | |
75 | (i < rsnd_ssi_nr(priv)) && \ | |
dd27d808 | 76 | ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ |
ae5c3223 KM |
77 | i++) |
78 | ||
dd27d808 | 79 | #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) |
ae5c3223 | 80 | #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
849fc82a | 81 | #define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma)) |
6cfad789 | 82 | #define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0) |
8c5c79a1 | 83 | #define rsnd_ssi_parent(ssi) ((ssi)->parent) |
ae5c3223 | 84 | #define rsnd_ssi_mode_flags(p) ((p)->info->flags) |
4b4dab82 | 85 | #define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id) |
04e627ba KM |
86 | #define rsnd_ssi_of_node(priv) \ |
87 | of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi") | |
ae5c3223 | 88 | |
e879a9dd | 89 | int rsnd_ssi_use_busif(struct rsnd_mod *mod) |
d9288d0b KM |
90 | { |
91 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
92 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
93 | int use_busif = 0; | |
94 | ||
7b466fc6 KM |
95 | if (!rsnd_ssi_is_dma_mode(mod)) |
96 | return 0; | |
97 | ||
d9288d0b KM |
98 | if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF)) |
99 | use_busif = 1; | |
100 | if (rsnd_io_to_mod_src(io)) | |
101 | use_busif = 1; | |
102 | ||
103 | return use_busif; | |
104 | } | |
105 | ||
ae5c3223 KM |
106 | static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
107 | u32 bit) | |
108 | { | |
109 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
110 | struct device *dev = rsnd_priv_to_dev(priv); | |
111 | u32 status; | |
112 | int i; | |
113 | ||
114 | for (i = 0; i < 1024; i++) { | |
115 | status = rsnd_mod_read(mod, SSISR); | |
116 | if (status & bit) | |
117 | return; | |
118 | ||
119 | udelay(50); | |
120 | } | |
121 | ||
122 | dev_warn(dev, "status check failed\n"); | |
123 | } | |
124 | ||
125 | static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, | |
adcf7d5e | 126 | struct rsnd_dai_stream *io) |
ae5c3223 | 127 | { |
1b13d118 | 128 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
adcf7d5e | 129 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
ae5c3223 KM |
130 | struct device *dev = rsnd_priv_to_dev(priv); |
131 | int i, j, ret; | |
132 | int adg_clk_div_table[] = { | |
133 | 1, 6, /* see adg.c */ | |
134 | }; | |
135 | int ssi_clk_mul_table[] = { | |
136 | 1, 2, 4, 8, 16, 6, 12, | |
137 | }; | |
138 | unsigned int main_rate; | |
ba9c949f | 139 | unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime); |
ae5c3223 KM |
140 | |
141 | /* | |
142 | * Find best clock, and try to start ADG | |
143 | */ | |
144 | for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) { | |
145 | for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { | |
146 | ||
147 | /* | |
148 | * this driver is assuming that | |
149 | * system word is 64fs (= 2 x 32bit) | |
729aca51 | 150 | * see rsnd_ssi_init() |
ae5c3223 KM |
151 | */ |
152 | main_rate = rate / adg_clk_div_table[i] | |
153 | * 32 * 2 * ssi_clk_mul_table[j]; | |
154 | ||
155 | ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate); | |
156 | if (0 == ret) { | |
ae5c3223 KM |
157 | ssi->cr_clk = FORCE | SWL_32 | |
158 | SCKD | SWSD | CKDV(j); | |
159 | ||
30cc4faf KM |
160 | dev_dbg(dev, "%s[%d] outputs %u Hz\n", |
161 | rsnd_mod_name(&ssi->mod), | |
ae5c3223 KM |
162 | rsnd_mod_id(&ssi->mod), rate); |
163 | ||
164 | return 0; | |
165 | } | |
166 | } | |
167 | } | |
168 | ||
169 | dev_err(dev, "unsupported clock rate\n"); | |
170 | return -EIO; | |
171 | } | |
172 | ||
173 | static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi) | |
174 | { | |
ae5c3223 KM |
175 | ssi->cr_clk = 0; |
176 | rsnd_adg_ssi_clk_stop(&ssi->mod); | |
177 | } | |
178 | ||
179 | static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi, | |
ae5c3223 KM |
180 | struct rsnd_dai_stream *io) |
181 | { | |
1b13d118 | 182 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
f708d944 | 183 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 | 184 | struct device *dev = rsnd_priv_to_dev(priv); |
05795411 | 185 | u32 cr_mode; |
ae5c3223 KM |
186 | u32 cr; |
187 | ||
188 | if (0 == ssi->usrcnt) { | |
85642952 | 189 | rsnd_mod_hw_start(&ssi->mod); |
ae5c3223 | 190 | |
3ed6448c | 191 | if (rsnd_rdai_is_clk_master(rdai)) { |
8c5c79a1 KM |
192 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); |
193 | ||
194 | if (ssi_parent) | |
195 | rsnd_ssi_hw_start(ssi_parent, io); | |
ae5c3223 | 196 | else |
adcf7d5e | 197 | rsnd_ssi_master_clk_start(ssi, io); |
ae5c3223 KM |
198 | } |
199 | } | |
200 | ||
05795411 | 201 | cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ? |
4e7d606c KM |
202 | DMEN : /* DMA : enable DMA */ |
203 | DIEN; /* PIO : enable Data interrupt */ | |
05795411 KM |
204 | |
205 | ||
ae5c3223 KM |
206 | cr = ssi->cr_own | |
207 | ssi->cr_clk | | |
05795411 | 208 | cr_mode | |
4e7d606c | 209 | UIEN | OIEN | EN; |
ae5c3223 KM |
210 | |
211 | rsnd_mod_write(&ssi->mod, SSICR, cr); | |
212 | ||
d1b64056 | 213 | /* enable WS continue */ |
3ed6448c | 214 | if (rsnd_rdai_is_clk_master(rdai)) |
d1b64056 KM |
215 | rsnd_mod_write(&ssi->mod, SSIWSR, CONT); |
216 | ||
3ba84f45 KM |
217 | /* clear error status */ |
218 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
219 | ||
ae5c3223 KM |
220 | ssi->usrcnt++; |
221 | ||
30cc4faf KM |
222 | dev_dbg(dev, "%s[%d] hw started\n", |
223 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
224 | } |
225 | ||
f708d944 | 226 | static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi) |
ae5c3223 KM |
227 | { |
228 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); | |
f708d944 KM |
229 | struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod); |
230 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
ae5c3223 KM |
231 | struct device *dev = rsnd_priv_to_dev(priv); |
232 | u32 cr; | |
233 | ||
234 | if (0 == ssi->usrcnt) /* stop might be called without start */ | |
235 | return; | |
236 | ||
237 | ssi->usrcnt--; | |
238 | ||
239 | if (0 == ssi->usrcnt) { | |
240 | /* | |
241 | * disable all IRQ, | |
242 | * and, wait all data was sent | |
243 | */ | |
244 | cr = ssi->cr_own | | |
245 | ssi->cr_clk; | |
246 | ||
247 | rsnd_mod_write(&ssi->mod, SSICR, cr | EN); | |
248 | rsnd_ssi_status_check(&ssi->mod, DIRQ); | |
249 | ||
250 | /* | |
251 | * disable SSI, | |
252 | * and, wait idle state | |
253 | */ | |
254 | rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */ | |
255 | rsnd_ssi_status_check(&ssi->mod, IIRQ); | |
256 | ||
3ed6448c | 257 | if (rsnd_rdai_is_clk_master(rdai)) { |
8c5c79a1 KM |
258 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); |
259 | ||
260 | if (ssi_parent) | |
261 | rsnd_ssi_hw_stop(ssi_parent); | |
ae5c3223 KM |
262 | else |
263 | rsnd_ssi_master_clk_stop(ssi); | |
264 | } | |
265 | ||
85642952 | 266 | rsnd_mod_hw_stop(&ssi->mod); |
ae5c3223 KM |
267 | } |
268 | ||
30cc4faf KM |
269 | dev_dbg(dev, "%s[%d] hw stopped\n", |
270 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
271 | } |
272 | ||
273 | /* | |
274 | * SSI mod common functions | |
275 | */ | |
276 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
690602fc | 277 | struct rsnd_priv *priv) |
ae5c3223 KM |
278 | { |
279 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
b42fccf6 | 280 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); |
690602fc | 281 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 KM |
282 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
283 | u32 cr; | |
284 | ||
285 | cr = FORCE; | |
286 | ||
287 | /* | |
288 | * always use 32bit system word for easy clock calculation. | |
289 | * see also rsnd_ssi_master_clk_enable() | |
290 | */ | |
291 | cr |= SWL_32; | |
292 | ||
293 | /* | |
294 | * init clock settings for SSICR | |
295 | */ | |
296 | switch (runtime->sample_bits) { | |
297 | case 16: | |
298 | cr |= DWL_16; | |
299 | break; | |
300 | case 32: | |
301 | cr |= DWL_24; | |
302 | break; | |
303 | default: | |
304 | return -EIO; | |
305 | } | |
306 | ||
307 | if (rdai->bit_clk_inv) | |
308 | cr |= SCKP; | |
309 | if (rdai->frm_clk_inv) | |
310 | cr |= SWSP; | |
311 | if (rdai->data_alignment) | |
312 | cr |= SDTA; | |
313 | if (rdai->sys_delay) | |
314 | cr |= DEL; | |
985a4f6e | 315 | if (rsnd_io_is_play(io)) |
ae5c3223 KM |
316 | cr |= TRMD; |
317 | ||
318 | /* | |
319 | * set ssi parameter | |
320 | */ | |
ae5c3223 KM |
321 | ssi->cr_own = cr; |
322 | ssi->err = -1; /* ignore 1st error */ | |
323 | ||
ae5c3223 KM |
324 | return 0; |
325 | } | |
326 | ||
327 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
690602fc | 328 | struct rsnd_priv *priv) |
ae5c3223 KM |
329 | { |
330 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
331 | struct device *dev = rsnd_priv_to_dev(priv); |
332 | ||
ae5c3223 | 333 | if (ssi->err > 0) |
337b0b4c KM |
334 | dev_warn(dev, "%s[%d] under/over flow err = %d\n", |
335 | rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err); | |
ae5c3223 | 336 | |
ae5c3223 KM |
337 | ssi->cr_own = 0; |
338 | ssi->err = 0; | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) | |
344 | { | |
345 | /* under/over flow error */ | |
346 | if (status & (UIRQ | OIRQ)) { | |
347 | ssi->err++; | |
348 | ||
349 | /* clear error status */ | |
350 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
351 | } | |
352 | } | |
353 | ||
4e7d606c | 354 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
690602fc | 355 | struct rsnd_priv *priv) |
4e7d606c KM |
356 | { |
357 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
358 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
359 | ||
f708d944 | 360 | rsnd_src_ssiu_start(mod, rsnd_ssi_use_busif(mod)); |
4e7d606c | 361 | |
f708d944 | 362 | rsnd_ssi_hw_start(ssi, io); |
4e7d606c | 363 | |
f708d944 | 364 | rsnd_src_ssi_irq_enable(mod); |
4e7d606c KM |
365 | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static int rsnd_ssi_stop(struct rsnd_mod *mod, | |
690602fc | 370 | struct rsnd_priv *priv) |
4e7d606c KM |
371 | { |
372 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
373 | ||
f708d944 | 374 | rsnd_src_ssi_irq_disable(mod); |
4e7d606c KM |
375 | |
376 | rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR)); | |
377 | ||
f708d944 | 378 | rsnd_ssi_hw_stop(ssi); |
4e7d606c | 379 | |
f708d944 | 380 | rsnd_src_ssiu_stop(mod); |
4e7d606c KM |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
6cfad789 | 385 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) |
ae5c3223 KM |
386 | { |
387 | struct rsnd_ssi *ssi = data; | |
4686a0ad | 388 | struct rsnd_mod *mod = &ssi->mod; |
690602fc | 389 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
4686a0ad | 390 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); |
765ae7c8 | 391 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
4686a0ad | 392 | u32 status = rsnd_mod_read(mod, SSISR); |
ae5c3223 | 393 | |
4e7d606c KM |
394 | if (!io) |
395 | return IRQ_NONE; | |
396 | ||
397 | /* PIO only */ | |
765ae7c8 | 398 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
399 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
400 | u32 *buf = (u32 *)(runtime->dma_area + | |
401 | rsnd_dai_pointer_offset(io, 0)); | |
402 | ||
ae5c3223 KM |
403 | /* |
404 | * 8/16/32 data can be assesse to TDR/RDR register | |
405 | * directly as 32bit data | |
406 | * see rsnd_ssi_init() | |
407 | */ | |
985a4f6e | 408 | if (rsnd_io_is_play(io)) |
4686a0ad | 409 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 410 | else |
4686a0ad | 411 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 KM |
412 | |
413 | rsnd_dai_pointer_update(io, sizeof(*buf)); | |
4e7d606c | 414 | } |
ae5c3223 | 415 | |
4e7d606c KM |
416 | /* PIO / DMA */ |
417 | if (status & (UIRQ | OIRQ)) { | |
4e7d606c KM |
418 | struct device *dev = rsnd_priv_to_dev(priv); |
419 | ||
420 | /* | |
421 | * restart SSI | |
422 | */ | |
4e7d606c KM |
423 | dev_dbg(dev, "%s[%d] restart\n", |
424 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
044930b4 KM |
425 | |
426 | rsnd_ssi_stop(mod, priv); | |
427 | if (ssi->err < 1024) | |
428 | rsnd_ssi_start(mod, priv); | |
429 | else | |
430 | dev_warn(dev, "no more SSI restart\n"); | |
ae5c3223 KM |
431 | } |
432 | ||
4e7d606c KM |
433 | rsnd_ssi_record_error(ssi, status); |
434 | ||
435 | return IRQ_HANDLED; | |
ae5c3223 KM |
436 | } |
437 | ||
6cfad789 KM |
438 | /* |
439 | * SSI PIO | |
440 | */ | |
ff8f30e6 | 441 | static int rsnd_ssi_pio_probe(struct rsnd_mod *mod, |
690602fc | 442 | struct rsnd_priv *priv) |
ff8f30e6 | 443 | { |
ff8f30e6 KM |
444 | struct device *dev = rsnd_priv_to_dev(priv); |
445 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
446 | int ret; |
447 | ||
6cfad789 KM |
448 | ret = devm_request_irq(dev, ssi->info->irq, |
449 | rsnd_ssi_interrupt, | |
ff8f30e6 KM |
450 | IRQF_SHARED, |
451 | dev_name(dev), ssi); | |
8aefda50 | 452 | |
ff8f30e6 KM |
453 | return ret; |
454 | } | |
455 | ||
ae5c3223 | 456 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 457 | .name = SSI_NAME, |
ff8f30e6 | 458 | .probe = rsnd_ssi_pio_probe, |
ae5c3223 KM |
459 | .init = rsnd_ssi_init, |
460 | .quit = rsnd_ssi_quit, | |
49229850 KM |
461 | .start = rsnd_ssi_start, |
462 | .stop = rsnd_ssi_stop, | |
ae5c3223 KM |
463 | }; |
464 | ||
ff8f30e6 | 465 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
690602fc | 466 | struct rsnd_priv *priv) |
ff8f30e6 | 467 | { |
ff8f30e6 | 468 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
ff8f30e6 KM |
469 | struct device *dev = rsnd_priv_to_dev(priv); |
470 | int dma_id = ssi->info->dma_id; | |
ff8f30e6 KM |
471 | int ret; |
472 | ||
6cfad789 KM |
473 | ret = devm_request_irq(dev, ssi->info->irq, |
474 | rsnd_ssi_interrupt, | |
4e7d606c KM |
475 | IRQF_SHARED, |
476 | dev_name(dev), ssi); | |
477 | if (ret) | |
b543b52a | 478 | return ret; |
4e7d606c | 479 | |
ff8f30e6 KM |
480 | ret = rsnd_dma_init( |
481 | priv, rsnd_mod_to_dma(mod), | |
ff8f30e6 | 482 | dma_id); |
8aefda50 | 483 | |
ff8f30e6 KM |
484 | return ret; |
485 | } | |
486 | ||
487 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
690602fc | 488 | struct rsnd_priv *priv) |
97463e19 | 489 | { |
4e7d606c KM |
490 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
491 | struct device *dev = rsnd_priv_to_dev(priv); | |
6cfad789 | 492 | int irq = ssi->info->irq; |
4e7d606c | 493 | |
8a2ff426 | 494 | rsnd_dma_quit(rsnd_mod_to_dma(mod)); |
97463e19 | 495 | |
4e7d606c KM |
496 | /* PIO will request IRQ again */ |
497 | devm_free_irq(dev, irq, ssi); | |
498 | ||
97463e19 KM |
499 | return 0; |
500 | } | |
501 | ||
502 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
690602fc | 503 | struct rsnd_priv *priv) |
ff8f30e6 | 504 | { |
d3a76823 KM |
505 | struct device *dev = rsnd_priv_to_dev(priv); |
506 | ||
d3a76823 KM |
507 | /* |
508 | * fallback to PIO | |
509 | * | |
510 | * SSI .probe might be called again. | |
511 | * see | |
512 | * rsnd_rdai_continuance_probe() | |
513 | */ | |
514 | mod->ops = &rsnd_ssi_pio_ops; | |
515 | ||
516 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
517 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
518 | ||
ff8f30e6 KM |
519 | return 0; |
520 | } | |
521 | ||
849fc82a | 522 | static int rsnd_ssi_dma_start(struct rsnd_mod *mod, |
690602fc | 523 | struct rsnd_priv *priv) |
849fc82a | 524 | { |
49229850 | 525 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
d9288d0b | 526 | |
7b466fc6 KM |
527 | rsnd_dma_start(dma); |
528 | ||
1ceeab26 KM |
529 | rsnd_ssi_start(mod, priv); |
530 | ||
849fc82a KM |
531 | return 0; |
532 | } | |
533 | ||
534 | static int rsnd_ssi_dma_stop(struct rsnd_mod *mod, | |
690602fc | 535 | struct rsnd_priv *priv) |
849fc82a | 536 | { |
49229850 | 537 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
849fc82a | 538 | |
690602fc | 539 | rsnd_ssi_stop(mod, priv); |
d9288d0b | 540 | |
1ceeab26 KM |
541 | rsnd_dma_stop(dma); |
542 | ||
849fc82a KM |
543 | return 0; |
544 | } | |
545 | ||
72adc61f | 546 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_mod *mod) |
d9288d0b | 547 | { |
72adc61f KM |
548 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
549 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
550 | int is_play = rsnd_io_is_play(io); | |
551 | char *name; | |
552 | ||
553 | if (rsnd_ssi_use_busif(mod)) | |
554 | name = is_play ? "rxu" : "txu"; | |
555 | else | |
556 | name = is_play ? "rx" : "tx"; | |
557 | ||
558 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
559 | mod, name); | |
d9288d0b KM |
560 | } |
561 | ||
849fc82a | 562 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 563 | .name = SSI_NAME, |
72adc61f | 564 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
565 | .probe = rsnd_ssi_dma_probe, |
566 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
567 | .init = rsnd_ssi_init, |
568 | .quit = rsnd_ssi_quit, | |
569 | .start = rsnd_ssi_dma_start, | |
570 | .stop = rsnd_ssi_dma_stop, | |
97463e19 | 571 | .fallback = rsnd_ssi_fallback, |
849fc82a KM |
572 | }; |
573 | ||
05795411 KM |
574 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
575 | { | |
576 | return mod->ops == &rsnd_ssi_dma_ops; | |
577 | } | |
578 | ||
579 | ||
ae5c3223 KM |
580 | /* |
581 | * Non SSI | |
582 | */ | |
ae5c3223 | 583 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 584 | .name = SSI_NAME, |
ae5c3223 KM |
585 | }; |
586 | ||
587 | /* | |
588 | * ssi mod function | |
589 | */ | |
590 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) | |
591 | { | |
8b14719b TI |
592 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
593 | id = 0; | |
ae5c3223 | 594 | |
dd27d808 | 595 | return &((struct rsnd_ssi *)(priv->ssi) + id)->mod; |
ae5c3223 KM |
596 | } |
597 | ||
7b5ce975 KM |
598 | int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
599 | { | |
600 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
601 | ||
602 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
603 | } | |
604 | ||
8c5c79a1 | 605 | static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi) |
7b5ce975 KM |
606 | { |
607 | if (!rsnd_ssi_is_pin_sharing(&ssi->mod)) | |
608 | return; | |
609 | ||
610 | switch (rsnd_mod_id(&ssi->mod)) { | |
611 | case 1: | |
612 | case 2: | |
613 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0)); | |
614 | break; | |
615 | case 4: | |
616 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3)); | |
617 | break; | |
618 | case 8: | |
619 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7)); | |
620 | break; | |
621 | } | |
622 | } | |
623 | ||
90e8e50f KM |
624 | |
625 | static void rsnd_of_parse_ssi(struct platform_device *pdev, | |
626 | const struct rsnd_of_data *of_data, | |
627 | struct rsnd_priv *priv) | |
628 | { | |
629 | struct device_node *node; | |
630 | struct device_node *np; | |
631 | struct rsnd_ssi_platform_info *ssi_info; | |
632 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); | |
633 | struct device *dev = &pdev->dev; | |
634 | int nr, i; | |
635 | ||
636 | if (!of_data) | |
637 | return; | |
638 | ||
04e627ba | 639 | node = rsnd_ssi_of_node(priv); |
90e8e50f KM |
640 | if (!node) |
641 | return; | |
642 | ||
643 | nr = of_get_child_count(node); | |
644 | if (!nr) | |
f451e48d | 645 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
646 | |
647 | ssi_info = devm_kzalloc(dev, | |
648 | sizeof(struct rsnd_ssi_platform_info) * nr, | |
649 | GFP_KERNEL); | |
650 | if (!ssi_info) { | |
651 | dev_err(dev, "ssi info allocation error\n"); | |
f451e48d | 652 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
653 | } |
654 | ||
655 | info->ssi_info = ssi_info; | |
656 | info->ssi_info_nr = nr; | |
657 | ||
658 | i = -1; | |
659 | for_each_child_of_node(node, np) { | |
660 | i++; | |
661 | ||
662 | ssi_info = info->ssi_info + i; | |
663 | ||
664 | /* | |
665 | * pin settings | |
666 | */ | |
667 | if (of_get_property(np, "shared-pin", NULL)) | |
668 | ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE; | |
669 | ||
670 | /* | |
671 | * irq | |
672 | */ | |
6cfad789 | 673 | ssi_info->irq = irq_of_parse_and_map(np, 0); |
199e7688 KM |
674 | |
675 | /* | |
676 | * DMA | |
677 | */ | |
678 | ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ? | |
679 | 0 : 1; | |
d9288d0b KM |
680 | |
681 | if (of_get_property(np, "no-busif", NULL)) | |
682 | ssi_info->flags |= RSND_SSI_NO_BUSIF; | |
90e8e50f | 683 | } |
f451e48d KM |
684 | |
685 | rsnd_of_parse_ssi_end: | |
686 | of_node_put(node); | |
90e8e50f KM |
687 | } |
688 | ||
ae5c3223 | 689 | int rsnd_ssi_probe(struct platform_device *pdev, |
90e8e50f | 690 | const struct rsnd_of_data *of_data, |
ae5c3223 KM |
691 | struct rsnd_priv *priv) |
692 | { | |
5da39cf3 | 693 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
ae5c3223 KM |
694 | struct rsnd_ssi_platform_info *pinfo; |
695 | struct device *dev = rsnd_priv_to_dev(priv); | |
696 | struct rsnd_mod_ops *ops; | |
697 | struct clk *clk; | |
ae5c3223 KM |
698 | struct rsnd_ssi *ssi; |
699 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 700 | int i, nr, ret; |
ae5c3223 | 701 | |
90e8e50f KM |
702 | rsnd_of_parse_ssi(pdev, of_data, priv); |
703 | ||
ae5c3223 KM |
704 | /* |
705 | * init SSI | |
706 | */ | |
707 | nr = info->ssi_info_nr; | |
dd27d808 KM |
708 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
709 | if (!ssi) { | |
ae5c3223 KM |
710 | dev_err(dev, "SSI allocate failed\n"); |
711 | return -ENOMEM; | |
712 | } | |
713 | ||
dd27d808 KM |
714 | priv->ssi = ssi; |
715 | priv->ssi_nr = nr; | |
ae5c3223 KM |
716 | |
717 | for_each_rsnd_ssi(ssi, priv, i) { | |
718 | pinfo = &info->ssi_info[i]; | |
719 | ||
8aefda50 KM |
720 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
721 | SSI_NAME, i); | |
ae5c3223 | 722 | |
60dbb4f1 | 723 | clk = devm_clk_get(dev, name); |
ae5c3223 KM |
724 | if (IS_ERR(clk)) |
725 | return PTR_ERR(clk); | |
726 | ||
727 | ssi->info = pinfo; | |
ae5c3223 KM |
728 | |
729 | ops = &rsnd_ssi_non_ops; | |
ff8f30e6 KM |
730 | if (pinfo->dma_id > 0) |
731 | ops = &rsnd_ssi_dma_ops; | |
732 | else if (rsnd_ssi_pio_available(ssi)) | |
733 | ops = &rsnd_ssi_pio_ops; | |
ae5c3223 | 734 | |
2f78dd7f KM |
735 | ret = rsnd_mod_init(&ssi->mod, ops, clk, RSND_MOD_SSI, i); |
736 | if (ret) | |
737 | return ret; | |
7b5ce975 | 738 | |
8c5c79a1 | 739 | rsnd_ssi_parent_setup(priv, ssi); |
ae5c3223 KM |
740 | } |
741 | ||
ae5c3223 KM |
742 | return 0; |
743 | } | |
2f78dd7f KM |
744 | |
745 | void rsnd_ssi_remove(struct platform_device *pdev, | |
746 | struct rsnd_priv *priv) | |
747 | { | |
748 | struct rsnd_ssi *ssi; | |
749 | int i; | |
750 | ||
751 | for_each_rsnd_ssi(ssi, priv, i) { | |
752 | rsnd_mod_quit(&ssi->mod); | |
753 | } | |
754 | } |