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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; | |
919567d9 | 69 | int chan; |
ae5c3223 KM |
70 | int err; |
71 | unsigned int usrcnt; | |
ae5c3223 KM |
72 | }; |
73 | ||
ae5c3223 KM |
74 | #define for_each_rsnd_ssi(pos, priv, i) \ |
75 | for (i = 0; \ | |
76 | (i < rsnd_ssi_nr(priv)) && \ | |
dd27d808 | 77 | ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ |
ae5c3223 KM |
78 | i++) |
79 | ||
dd27d808 | 80 | #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) |
ae5c3223 | 81 | #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
849fc82a | 82 | #define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma)) |
6cfad789 | 83 | #define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0) |
8c5c79a1 | 84 | #define rsnd_ssi_parent(ssi) ((ssi)->parent) |
ae5c3223 | 85 | #define rsnd_ssi_mode_flags(p) ((p)->info->flags) |
4b4dab82 | 86 | #define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id) |
04e627ba KM |
87 | #define rsnd_ssi_of_node(priv) \ |
88 | of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi") | |
ae5c3223 | 89 | |
e879a9dd | 90 | int rsnd_ssi_use_busif(struct rsnd_mod *mod) |
d9288d0b KM |
91 | { |
92 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
93 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
94 | int use_busif = 0; | |
95 | ||
7b466fc6 KM |
96 | if (!rsnd_ssi_is_dma_mode(mod)) |
97 | return 0; | |
98 | ||
d9288d0b KM |
99 | if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF)) |
100 | use_busif = 1; | |
101 | if (rsnd_io_to_mod_src(io)) | |
102 | use_busif = 1; | |
103 | ||
104 | return use_busif; | |
105 | } | |
106 | ||
ae5c3223 KM |
107 | static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
108 | u32 bit) | |
109 | { | |
110 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
111 | struct device *dev = rsnd_priv_to_dev(priv); | |
112 | u32 status; | |
113 | int i; | |
114 | ||
115 | for (i = 0; i < 1024; i++) { | |
116 | status = rsnd_mod_read(mod, SSISR); | |
117 | if (status & bit) | |
118 | return; | |
119 | ||
120 | udelay(50); | |
121 | } | |
122 | ||
123 | dev_warn(dev, "status check failed\n"); | |
124 | } | |
125 | ||
126 | static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, | |
adcf7d5e | 127 | struct rsnd_dai_stream *io) |
ae5c3223 | 128 | { |
1b13d118 | 129 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
adcf7d5e | 130 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
ae5c3223 KM |
131 | struct device *dev = rsnd_priv_to_dev(priv); |
132 | int i, j, ret; | |
133 | int adg_clk_div_table[] = { | |
134 | 1, 6, /* see adg.c */ | |
135 | }; | |
136 | int ssi_clk_mul_table[] = { | |
137 | 1, 2, 4, 8, 16, 6, 12, | |
138 | }; | |
139 | unsigned int main_rate; | |
ba9c949f | 140 | unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime); |
ae5c3223 KM |
141 | |
142 | /* | |
143 | * Find best clock, and try to start ADG | |
144 | */ | |
145 | for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) { | |
146 | for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { | |
147 | ||
148 | /* | |
149 | * this driver is assuming that | |
150 | * system word is 64fs (= 2 x 32bit) | |
729aca51 | 151 | * see rsnd_ssi_init() |
ae5c3223 KM |
152 | */ |
153 | main_rate = rate / adg_clk_div_table[i] | |
154 | * 32 * 2 * ssi_clk_mul_table[j]; | |
155 | ||
156 | ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate); | |
157 | if (0 == ret) { | |
ae5c3223 KM |
158 | ssi->cr_clk = FORCE | SWL_32 | |
159 | SCKD | SWSD | CKDV(j); | |
160 | ||
30cc4faf KM |
161 | dev_dbg(dev, "%s[%d] outputs %u Hz\n", |
162 | rsnd_mod_name(&ssi->mod), | |
ae5c3223 KM |
163 | rsnd_mod_id(&ssi->mod), rate); |
164 | ||
165 | return 0; | |
166 | } | |
167 | } | |
168 | } | |
169 | ||
170 | dev_err(dev, "unsupported clock rate\n"); | |
171 | return -EIO; | |
172 | } | |
173 | ||
174 | static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi) | |
175 | { | |
ae5c3223 KM |
176 | ssi->cr_clk = 0; |
177 | rsnd_adg_ssi_clk_stop(&ssi->mod); | |
178 | } | |
179 | ||
180 | static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi, | |
ae5c3223 KM |
181 | struct rsnd_dai_stream *io) |
182 | { | |
1b13d118 | 183 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
f708d944 | 184 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 | 185 | struct device *dev = rsnd_priv_to_dev(priv); |
05795411 | 186 | u32 cr_mode; |
ae5c3223 KM |
187 | u32 cr; |
188 | ||
189 | if (0 == ssi->usrcnt) { | |
85642952 | 190 | rsnd_mod_hw_start(&ssi->mod); |
ae5c3223 | 191 | |
3ed6448c | 192 | if (rsnd_rdai_is_clk_master(rdai)) { |
8c5c79a1 KM |
193 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); |
194 | ||
195 | if (ssi_parent) | |
196 | rsnd_ssi_hw_start(ssi_parent, io); | |
ae5c3223 | 197 | else |
adcf7d5e | 198 | rsnd_ssi_master_clk_start(ssi, io); |
ae5c3223 KM |
199 | } |
200 | } | |
201 | ||
12927a8f KM |
202 | if (rsnd_ssi_is_dma_mode(&ssi->mod)) { |
203 | cr_mode = UIEN | OIEN | /* over/under run */ | |
204 | DMEN; /* DMA : enable DMA */ | |
205 | } else { | |
206 | cr_mode = DIEN; /* PIO : enable Data interrupt */ | |
207 | } | |
05795411 | 208 | |
ae5c3223 KM |
209 | cr = ssi->cr_own | |
210 | ssi->cr_clk | | |
05795411 | 211 | cr_mode | |
12927a8f | 212 | EN; |
ae5c3223 KM |
213 | |
214 | rsnd_mod_write(&ssi->mod, SSICR, cr); | |
215 | ||
d1b64056 | 216 | /* enable WS continue */ |
3ed6448c | 217 | if (rsnd_rdai_is_clk_master(rdai)) |
d1b64056 KM |
218 | rsnd_mod_write(&ssi->mod, SSIWSR, CONT); |
219 | ||
3ba84f45 KM |
220 | /* clear error status */ |
221 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
222 | ||
ae5c3223 KM |
223 | ssi->usrcnt++; |
224 | ||
30cc4faf KM |
225 | dev_dbg(dev, "%s[%d] hw started\n", |
226 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
227 | } |
228 | ||
f708d944 | 229 | static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi) |
ae5c3223 KM |
230 | { |
231 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); | |
f708d944 KM |
232 | struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod); |
233 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
ae5c3223 KM |
234 | struct device *dev = rsnd_priv_to_dev(priv); |
235 | u32 cr; | |
236 | ||
b8473579 KM |
237 | if (0 == ssi->usrcnt) { |
238 | dev_err(dev, "%s called without starting\n", __func__); | |
ae5c3223 | 239 | return; |
b8473579 | 240 | } |
ae5c3223 KM |
241 | |
242 | ssi->usrcnt--; | |
243 | ||
244 | if (0 == ssi->usrcnt) { | |
245 | /* | |
246 | * disable all IRQ, | |
247 | * and, wait all data was sent | |
248 | */ | |
249 | cr = ssi->cr_own | | |
250 | ssi->cr_clk; | |
251 | ||
252 | rsnd_mod_write(&ssi->mod, SSICR, cr | EN); | |
253 | rsnd_ssi_status_check(&ssi->mod, DIRQ); | |
254 | ||
255 | /* | |
256 | * disable SSI, | |
257 | * and, wait idle state | |
258 | */ | |
259 | rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */ | |
260 | rsnd_ssi_status_check(&ssi->mod, IIRQ); | |
261 | ||
3ed6448c | 262 | if (rsnd_rdai_is_clk_master(rdai)) { |
8c5c79a1 KM |
263 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); |
264 | ||
265 | if (ssi_parent) | |
266 | rsnd_ssi_hw_stop(ssi_parent); | |
ae5c3223 KM |
267 | else |
268 | rsnd_ssi_master_clk_stop(ssi); | |
269 | } | |
270 | ||
85642952 | 271 | rsnd_mod_hw_stop(&ssi->mod); |
919567d9 KM |
272 | |
273 | ssi->chan = 0; | |
ae5c3223 KM |
274 | } |
275 | ||
30cc4faf KM |
276 | dev_dbg(dev, "%s[%d] hw stopped\n", |
277 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
278 | } |
279 | ||
280 | /* | |
281 | * SSI mod common functions | |
282 | */ | |
283 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
2c0fac19 | 284 | struct rsnd_dai_stream *io, |
690602fc | 285 | struct rsnd_priv *priv) |
ae5c3223 KM |
286 | { |
287 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
690602fc | 288 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 KM |
289 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
290 | u32 cr; | |
291 | ||
292 | cr = FORCE; | |
293 | ||
294 | /* | |
295 | * always use 32bit system word for easy clock calculation. | |
296 | * see also rsnd_ssi_master_clk_enable() | |
297 | */ | |
298 | cr |= SWL_32; | |
299 | ||
300 | /* | |
301 | * init clock settings for SSICR | |
302 | */ | |
303 | switch (runtime->sample_bits) { | |
304 | case 16: | |
305 | cr |= DWL_16; | |
306 | break; | |
307 | case 32: | |
308 | cr |= DWL_24; | |
309 | break; | |
310 | default: | |
311 | return -EIO; | |
312 | } | |
313 | ||
314 | if (rdai->bit_clk_inv) | |
315 | cr |= SCKP; | |
316 | if (rdai->frm_clk_inv) | |
317 | cr |= SWSP; | |
318 | if (rdai->data_alignment) | |
319 | cr |= SDTA; | |
320 | if (rdai->sys_delay) | |
321 | cr |= DEL; | |
985a4f6e | 322 | if (rsnd_io_is_play(io)) |
ae5c3223 KM |
323 | cr |= TRMD; |
324 | ||
325 | /* | |
326 | * set ssi parameter | |
327 | */ | |
ae5c3223 KM |
328 | ssi->cr_own = cr; |
329 | ssi->err = -1; /* ignore 1st error */ | |
330 | ||
ae5c3223 KM |
331 | return 0; |
332 | } | |
333 | ||
334 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
2c0fac19 | 335 | struct rsnd_dai_stream *io, |
690602fc | 336 | struct rsnd_priv *priv) |
ae5c3223 KM |
337 | { |
338 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
339 | struct device *dev = rsnd_priv_to_dev(priv); |
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 | ||
348 | return 0; | |
349 | } | |
350 | ||
919567d9 | 351 | static int rsnd_ssi_hw_params(struct rsnd_mod *mod, |
2c0fac19 | 352 | struct rsnd_dai_stream *io, |
919567d9 KM |
353 | struct snd_pcm_substream *substream, |
354 | struct snd_pcm_hw_params *params) | |
355 | { | |
356 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
357 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); | |
358 | int chan = params_channels(params); | |
359 | ||
360 | /* | |
361 | * Already working. | |
362 | * It will happen if SSI has parent/child connection. | |
363 | */ | |
364 | if (ssi->usrcnt) { | |
365 | /* | |
366 | * it is error if child <-> parent SSI uses | |
367 | * different channels. | |
368 | */ | |
369 | if (ssi->chan != chan) | |
370 | return -EIO; | |
371 | } | |
372 | ||
373 | /* It will be removed on rsnd_ssi_hw_stop */ | |
374 | ssi->chan = chan; | |
375 | if (ssi_parent) | |
2c0fac19 KM |
376 | return rsnd_ssi_hw_params(&ssi_parent->mod, io, |
377 | substream, params); | |
919567d9 KM |
378 | |
379 | return 0; | |
380 | } | |
381 | ||
ae5c3223 KM |
382 | static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) |
383 | { | |
384 | /* under/over flow error */ | |
385 | if (status & (UIRQ | OIRQ)) { | |
386 | ssi->err++; | |
387 | ||
388 | /* clear error status */ | |
389 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
390 | } | |
391 | } | |
392 | ||
4e7d606c | 393 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
2c0fac19 | 394 | struct rsnd_dai_stream *io, |
690602fc | 395 | struct rsnd_priv *priv) |
4e7d606c KM |
396 | { |
397 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
4e7d606c | 398 | |
f708d944 | 399 | rsnd_src_ssiu_start(mod, rsnd_ssi_use_busif(mod)); |
4e7d606c | 400 | |
f708d944 | 401 | rsnd_ssi_hw_start(ssi, io); |
4e7d606c | 402 | |
f708d944 | 403 | rsnd_src_ssi_irq_enable(mod); |
4e7d606c KM |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static int rsnd_ssi_stop(struct rsnd_mod *mod, | |
2c0fac19 | 409 | struct rsnd_dai_stream *io, |
690602fc | 410 | struct rsnd_priv *priv) |
4e7d606c KM |
411 | { |
412 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
413 | ||
f708d944 | 414 | rsnd_src_ssi_irq_disable(mod); |
4e7d606c KM |
415 | |
416 | rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR)); | |
417 | ||
f708d944 | 418 | rsnd_ssi_hw_stop(ssi); |
4e7d606c | 419 | |
f708d944 | 420 | rsnd_src_ssiu_stop(mod); |
4e7d606c KM |
421 | |
422 | return 0; | |
423 | } | |
424 | ||
6cfad789 | 425 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) |
ae5c3223 KM |
426 | { |
427 | struct rsnd_ssi *ssi = data; | |
4686a0ad | 428 | struct rsnd_mod *mod = &ssi->mod; |
690602fc | 429 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
4686a0ad | 430 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); |
765ae7c8 | 431 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
02299d98 | 432 | u32 status; |
75defee0 | 433 | bool elapsed = false; |
02299d98 KM |
434 | |
435 | spin_lock(&priv->lock); | |
ae5c3223 | 436 | |
02299d98 KM |
437 | /* ignore all cases if not working */ |
438 | if (!rsnd_mod_is_working(mod)) | |
439 | goto rsnd_ssi_interrupt_out; | |
440 | ||
441 | status = rsnd_mod_read(mod, SSISR); | |
4e7d606c KM |
442 | |
443 | /* PIO only */ | |
765ae7c8 | 444 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
445 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
446 | u32 *buf = (u32 *)(runtime->dma_area + | |
447 | rsnd_dai_pointer_offset(io, 0)); | |
448 | ||
ae5c3223 KM |
449 | /* |
450 | * 8/16/32 data can be assesse to TDR/RDR register | |
451 | * directly as 32bit data | |
452 | * see rsnd_ssi_init() | |
453 | */ | |
985a4f6e | 454 | if (rsnd_io_is_play(io)) |
4686a0ad | 455 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 456 | else |
4686a0ad | 457 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 | 458 | |
75defee0 | 459 | elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); |
4e7d606c | 460 | } |
ae5c3223 | 461 | |
12927a8f KM |
462 | /* DMA only */ |
463 | if (is_dma && (status & (UIRQ | OIRQ))) { | |
4e7d606c KM |
464 | struct device *dev = rsnd_priv_to_dev(priv); |
465 | ||
466 | /* | |
467 | * restart SSI | |
468 | */ | |
4e7d606c KM |
469 | dev_dbg(dev, "%s[%d] restart\n", |
470 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
044930b4 | 471 | |
2c0fac19 | 472 | rsnd_ssi_stop(mod, io, priv); |
044930b4 | 473 | if (ssi->err < 1024) |
2c0fac19 | 474 | rsnd_ssi_start(mod, io, priv); |
044930b4 KM |
475 | else |
476 | dev_warn(dev, "no more SSI restart\n"); | |
ae5c3223 KM |
477 | } |
478 | ||
4e7d606c KM |
479 | rsnd_ssi_record_error(ssi, status); |
480 | ||
02299d98 KM |
481 | rsnd_ssi_interrupt_out: |
482 | spin_unlock(&priv->lock); | |
483 | ||
75defee0 KM |
484 | if (elapsed) |
485 | rsnd_dai_period_elapsed(io); | |
486 | ||
4e7d606c | 487 | return IRQ_HANDLED; |
ae5c3223 KM |
488 | } |
489 | ||
6cfad789 KM |
490 | /* |
491 | * SSI PIO | |
492 | */ | |
ff8f30e6 | 493 | static int rsnd_ssi_pio_probe(struct rsnd_mod *mod, |
2c0fac19 | 494 | struct rsnd_dai_stream *io, |
690602fc | 495 | struct rsnd_priv *priv) |
ff8f30e6 | 496 | { |
ff8f30e6 KM |
497 | struct device *dev = rsnd_priv_to_dev(priv); |
498 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
499 | int ret; |
500 | ||
6cfad789 KM |
501 | ret = devm_request_irq(dev, ssi->info->irq, |
502 | rsnd_ssi_interrupt, | |
ff8f30e6 KM |
503 | IRQF_SHARED, |
504 | dev_name(dev), ssi); | |
8aefda50 | 505 | |
ff8f30e6 KM |
506 | return ret; |
507 | } | |
508 | ||
ae5c3223 | 509 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 510 | .name = SSI_NAME, |
ff8f30e6 | 511 | .probe = rsnd_ssi_pio_probe, |
ae5c3223 KM |
512 | .init = rsnd_ssi_init, |
513 | .quit = rsnd_ssi_quit, | |
49229850 KM |
514 | .start = rsnd_ssi_start, |
515 | .stop = rsnd_ssi_stop, | |
919567d9 | 516 | .hw_params = rsnd_ssi_hw_params, |
ae5c3223 KM |
517 | }; |
518 | ||
ff8f30e6 | 519 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
2c0fac19 | 520 | struct rsnd_dai_stream *io, |
690602fc | 521 | struct rsnd_priv *priv) |
ff8f30e6 | 522 | { |
ff8f30e6 | 523 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
ff8f30e6 KM |
524 | struct device *dev = rsnd_priv_to_dev(priv); |
525 | int dma_id = ssi->info->dma_id; | |
ff8f30e6 KM |
526 | int ret; |
527 | ||
6cfad789 KM |
528 | ret = devm_request_irq(dev, ssi->info->irq, |
529 | rsnd_ssi_interrupt, | |
4e7d606c KM |
530 | IRQF_SHARED, |
531 | dev_name(dev), ssi); | |
532 | if (ret) | |
b543b52a | 533 | return ret; |
4e7d606c | 534 | |
ff8f30e6 KM |
535 | ret = rsnd_dma_init( |
536 | priv, rsnd_mod_to_dma(mod), | |
ff8f30e6 | 537 | dma_id); |
8aefda50 | 538 | |
ff8f30e6 KM |
539 | return ret; |
540 | } | |
541 | ||
542 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
2c0fac19 | 543 | struct rsnd_dai_stream *io, |
690602fc | 544 | struct rsnd_priv *priv) |
97463e19 | 545 | { |
4e7d606c KM |
546 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
547 | struct device *dev = rsnd_priv_to_dev(priv); | |
6cfad789 | 548 | int irq = ssi->info->irq; |
4e7d606c | 549 | |
8a2ff426 | 550 | rsnd_dma_quit(rsnd_mod_to_dma(mod)); |
97463e19 | 551 | |
4e7d606c KM |
552 | /* PIO will request IRQ again */ |
553 | devm_free_irq(dev, irq, ssi); | |
554 | ||
97463e19 KM |
555 | return 0; |
556 | } | |
557 | ||
558 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
2c0fac19 | 559 | struct rsnd_dai_stream *io, |
690602fc | 560 | struct rsnd_priv *priv) |
ff8f30e6 | 561 | { |
d3a76823 KM |
562 | struct device *dev = rsnd_priv_to_dev(priv); |
563 | ||
d3a76823 KM |
564 | /* |
565 | * fallback to PIO | |
566 | * | |
567 | * SSI .probe might be called again. | |
568 | * see | |
569 | * rsnd_rdai_continuance_probe() | |
570 | */ | |
571 | mod->ops = &rsnd_ssi_pio_ops; | |
572 | ||
573 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
574 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
575 | ||
ff8f30e6 KM |
576 | return 0; |
577 | } | |
578 | ||
849fc82a | 579 | static int rsnd_ssi_dma_start(struct rsnd_mod *mod, |
2c0fac19 | 580 | struct rsnd_dai_stream *io, |
690602fc | 581 | struct rsnd_priv *priv) |
849fc82a | 582 | { |
49229850 | 583 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
d9288d0b | 584 | |
7b466fc6 KM |
585 | rsnd_dma_start(dma); |
586 | ||
2c0fac19 | 587 | rsnd_ssi_start(mod, io, priv); |
1ceeab26 | 588 | |
849fc82a KM |
589 | return 0; |
590 | } | |
591 | ||
592 | static int rsnd_ssi_dma_stop(struct rsnd_mod *mod, | |
2c0fac19 | 593 | struct rsnd_dai_stream *io, |
690602fc | 594 | struct rsnd_priv *priv) |
849fc82a | 595 | { |
49229850 | 596 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
849fc82a | 597 | |
2c0fac19 | 598 | rsnd_ssi_stop(mod, io, priv); |
d9288d0b | 599 | |
1ceeab26 KM |
600 | rsnd_dma_stop(dma); |
601 | ||
849fc82a KM |
602 | return 0; |
603 | } | |
604 | ||
72adc61f | 605 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_mod *mod) |
d9288d0b | 606 | { |
72adc61f KM |
607 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
608 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
609 | int is_play = rsnd_io_is_play(io); | |
610 | char *name; | |
611 | ||
612 | if (rsnd_ssi_use_busif(mod)) | |
613 | name = is_play ? "rxu" : "txu"; | |
614 | else | |
615 | name = is_play ? "rx" : "tx"; | |
616 | ||
617 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
618 | mod, name); | |
d9288d0b KM |
619 | } |
620 | ||
849fc82a | 621 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 622 | .name = SSI_NAME, |
72adc61f | 623 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
624 | .probe = rsnd_ssi_dma_probe, |
625 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
626 | .init = rsnd_ssi_init, |
627 | .quit = rsnd_ssi_quit, | |
628 | .start = rsnd_ssi_dma_start, | |
629 | .stop = rsnd_ssi_dma_stop, | |
97463e19 | 630 | .fallback = rsnd_ssi_fallback, |
919567d9 | 631 | .hw_params = rsnd_ssi_hw_params, |
849fc82a KM |
632 | }; |
633 | ||
05795411 KM |
634 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
635 | { | |
636 | return mod->ops == &rsnd_ssi_dma_ops; | |
637 | } | |
638 | ||
639 | ||
ae5c3223 KM |
640 | /* |
641 | * Non SSI | |
642 | */ | |
ae5c3223 | 643 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 644 | .name = SSI_NAME, |
ae5c3223 KM |
645 | }; |
646 | ||
647 | /* | |
648 | * ssi mod function | |
649 | */ | |
650 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) | |
651 | { | |
8b14719b TI |
652 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
653 | id = 0; | |
ae5c3223 | 654 | |
dd27d808 | 655 | return &((struct rsnd_ssi *)(priv->ssi) + id)->mod; |
ae5c3223 KM |
656 | } |
657 | ||
7b5ce975 KM |
658 | int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
659 | { | |
660 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
661 | ||
662 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
663 | } | |
664 | ||
8c5c79a1 | 665 | static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi) |
7b5ce975 KM |
666 | { |
667 | if (!rsnd_ssi_is_pin_sharing(&ssi->mod)) | |
668 | return; | |
669 | ||
670 | switch (rsnd_mod_id(&ssi->mod)) { | |
671 | case 1: | |
672 | case 2: | |
673 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0)); | |
674 | break; | |
675 | case 4: | |
676 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3)); | |
677 | break; | |
678 | case 8: | |
679 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7)); | |
680 | break; | |
681 | } | |
682 | } | |
683 | ||
90e8e50f KM |
684 | |
685 | static void rsnd_of_parse_ssi(struct platform_device *pdev, | |
686 | const struct rsnd_of_data *of_data, | |
687 | struct rsnd_priv *priv) | |
688 | { | |
689 | struct device_node *node; | |
690 | struct device_node *np; | |
691 | struct rsnd_ssi_platform_info *ssi_info; | |
692 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); | |
693 | struct device *dev = &pdev->dev; | |
694 | int nr, i; | |
695 | ||
696 | if (!of_data) | |
697 | return; | |
698 | ||
04e627ba | 699 | node = rsnd_ssi_of_node(priv); |
90e8e50f KM |
700 | if (!node) |
701 | return; | |
702 | ||
703 | nr = of_get_child_count(node); | |
704 | if (!nr) | |
f451e48d | 705 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
706 | |
707 | ssi_info = devm_kzalloc(dev, | |
708 | sizeof(struct rsnd_ssi_platform_info) * nr, | |
709 | GFP_KERNEL); | |
710 | if (!ssi_info) { | |
711 | dev_err(dev, "ssi info allocation error\n"); | |
f451e48d | 712 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
713 | } |
714 | ||
715 | info->ssi_info = ssi_info; | |
716 | info->ssi_info_nr = nr; | |
717 | ||
718 | i = -1; | |
719 | for_each_child_of_node(node, np) { | |
720 | i++; | |
721 | ||
722 | ssi_info = info->ssi_info + i; | |
723 | ||
724 | /* | |
725 | * pin settings | |
726 | */ | |
727 | if (of_get_property(np, "shared-pin", NULL)) | |
728 | ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE; | |
729 | ||
730 | /* | |
731 | * irq | |
732 | */ | |
6cfad789 | 733 | ssi_info->irq = irq_of_parse_and_map(np, 0); |
199e7688 KM |
734 | |
735 | /* | |
736 | * DMA | |
737 | */ | |
738 | ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ? | |
739 | 0 : 1; | |
d9288d0b KM |
740 | |
741 | if (of_get_property(np, "no-busif", NULL)) | |
742 | ssi_info->flags |= RSND_SSI_NO_BUSIF; | |
90e8e50f | 743 | } |
f451e48d KM |
744 | |
745 | rsnd_of_parse_ssi_end: | |
746 | of_node_put(node); | |
90e8e50f KM |
747 | } |
748 | ||
ae5c3223 | 749 | int rsnd_ssi_probe(struct platform_device *pdev, |
90e8e50f | 750 | const struct rsnd_of_data *of_data, |
ae5c3223 KM |
751 | struct rsnd_priv *priv) |
752 | { | |
5da39cf3 | 753 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
ae5c3223 KM |
754 | struct rsnd_ssi_platform_info *pinfo; |
755 | struct device *dev = rsnd_priv_to_dev(priv); | |
756 | struct rsnd_mod_ops *ops; | |
757 | struct clk *clk; | |
ae5c3223 KM |
758 | struct rsnd_ssi *ssi; |
759 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 760 | int i, nr, ret; |
ae5c3223 | 761 | |
90e8e50f KM |
762 | rsnd_of_parse_ssi(pdev, of_data, priv); |
763 | ||
ae5c3223 KM |
764 | /* |
765 | * init SSI | |
766 | */ | |
767 | nr = info->ssi_info_nr; | |
dd27d808 KM |
768 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
769 | if (!ssi) { | |
ae5c3223 KM |
770 | dev_err(dev, "SSI allocate failed\n"); |
771 | return -ENOMEM; | |
772 | } | |
773 | ||
dd27d808 KM |
774 | priv->ssi = ssi; |
775 | priv->ssi_nr = nr; | |
ae5c3223 KM |
776 | |
777 | for_each_rsnd_ssi(ssi, priv, i) { | |
778 | pinfo = &info->ssi_info[i]; | |
779 | ||
8aefda50 KM |
780 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
781 | SSI_NAME, i); | |
ae5c3223 | 782 | |
60dbb4f1 | 783 | clk = devm_clk_get(dev, name); |
ae5c3223 KM |
784 | if (IS_ERR(clk)) |
785 | return PTR_ERR(clk); | |
786 | ||
787 | ssi->info = pinfo; | |
ae5c3223 KM |
788 | |
789 | ops = &rsnd_ssi_non_ops; | |
ff8f30e6 KM |
790 | if (pinfo->dma_id > 0) |
791 | ops = &rsnd_ssi_dma_ops; | |
792 | else if (rsnd_ssi_pio_available(ssi)) | |
793 | ops = &rsnd_ssi_pio_ops; | |
ae5c3223 | 794 | |
2099bc8e | 795 | ret = rsnd_mod_init(priv, &ssi->mod, ops, clk, RSND_MOD_SSI, i); |
2f78dd7f KM |
796 | if (ret) |
797 | return ret; | |
7b5ce975 | 798 | |
8c5c79a1 | 799 | rsnd_ssi_parent_setup(priv, ssi); |
ae5c3223 KM |
800 | } |
801 | ||
ae5c3223 KM |
802 | return 0; |
803 | } | |
2f78dd7f KM |
804 | |
805 | void rsnd_ssi_remove(struct platform_device *pdev, | |
806 | struct rsnd_priv *priv) | |
807 | { | |
808 | struct rsnd_ssi *ssi; | |
809 | int i; | |
810 | ||
811 | for_each_rsnd_ssi(ssi, priv, i) { | |
812 | rsnd_mod_quit(&ssi->mod); | |
813 | } | |
814 | } |