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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 | |
bfc0cfe6 | 90 | int rsnd_ssi_use_busif(struct rsnd_dai_stream *io, struct rsnd_mod *mod) |
d9288d0b KM |
91 | { |
92 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
d9288d0b KM |
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 | ||
12927a8f KM |
201 | if (rsnd_ssi_is_dma_mode(&ssi->mod)) { |
202 | cr_mode = UIEN | OIEN | /* over/under run */ | |
203 | DMEN; /* DMA : enable DMA */ | |
204 | } else { | |
205 | cr_mode = DIEN; /* PIO : enable Data interrupt */ | |
206 | } | |
05795411 | 207 | |
ae5c3223 KM |
208 | cr = ssi->cr_own | |
209 | ssi->cr_clk | | |
05795411 | 210 | cr_mode | |
12927a8f | 211 | EN; |
ae5c3223 KM |
212 | |
213 | rsnd_mod_write(&ssi->mod, SSICR, cr); | |
214 | ||
d1b64056 | 215 | /* enable WS continue */ |
3ed6448c | 216 | if (rsnd_rdai_is_clk_master(rdai)) |
d1b64056 KM |
217 | rsnd_mod_write(&ssi->mod, SSIWSR, CONT); |
218 | ||
3ba84f45 KM |
219 | /* clear error status */ |
220 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
221 | ||
ae5c3223 KM |
222 | ssi->usrcnt++; |
223 | ||
30cc4faf KM |
224 | dev_dbg(dev, "%s[%d] hw started\n", |
225 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
226 | } |
227 | ||
bfc0cfe6 | 228 | static void rsnd_ssi_hw_stop(struct rsnd_dai_stream *io, struct rsnd_ssi *ssi) |
ae5c3223 KM |
229 | { |
230 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); | |
f708d944 | 231 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 KM |
232 | struct device *dev = rsnd_priv_to_dev(priv); |
233 | u32 cr; | |
234 | ||
b8473579 KM |
235 | if (0 == ssi->usrcnt) { |
236 | dev_err(dev, "%s called without starting\n", __func__); | |
ae5c3223 | 237 | return; |
b8473579 | 238 | } |
ae5c3223 KM |
239 | |
240 | ssi->usrcnt--; | |
241 | ||
242 | if (0 == ssi->usrcnt) { | |
243 | /* | |
244 | * disable all IRQ, | |
245 | * and, wait all data was sent | |
246 | */ | |
247 | cr = ssi->cr_own | | |
248 | ssi->cr_clk; | |
249 | ||
250 | rsnd_mod_write(&ssi->mod, SSICR, cr | EN); | |
251 | rsnd_ssi_status_check(&ssi->mod, DIRQ); | |
252 | ||
253 | /* | |
254 | * disable SSI, | |
255 | * and, wait idle state | |
256 | */ | |
257 | rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */ | |
258 | rsnd_ssi_status_check(&ssi->mod, IIRQ); | |
259 | ||
3ed6448c | 260 | if (rsnd_rdai_is_clk_master(rdai)) { |
8c5c79a1 KM |
261 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); |
262 | ||
263 | if (ssi_parent) | |
bfc0cfe6 | 264 | rsnd_ssi_hw_stop(io, ssi_parent); |
ae5c3223 KM |
265 | else |
266 | rsnd_ssi_master_clk_stop(ssi); | |
267 | } | |
268 | ||
85642952 | 269 | rsnd_mod_hw_stop(&ssi->mod); |
919567d9 KM |
270 | |
271 | ssi->chan = 0; | |
ae5c3223 KM |
272 | } |
273 | ||
30cc4faf KM |
274 | dev_dbg(dev, "%s[%d] hw stopped\n", |
275 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
276 | } |
277 | ||
278 | /* | |
279 | * SSI mod common functions | |
280 | */ | |
281 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
2c0fac19 | 282 | struct rsnd_dai_stream *io, |
690602fc | 283 | struct rsnd_priv *priv) |
ae5c3223 KM |
284 | { |
285 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
690602fc | 286 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 KM |
287 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
288 | u32 cr; | |
289 | ||
290 | cr = FORCE; | |
291 | ||
292 | /* | |
293 | * always use 32bit system word for easy clock calculation. | |
294 | * see also rsnd_ssi_master_clk_enable() | |
295 | */ | |
296 | cr |= SWL_32; | |
297 | ||
298 | /* | |
299 | * init clock settings for SSICR | |
300 | */ | |
301 | switch (runtime->sample_bits) { | |
302 | case 16: | |
303 | cr |= DWL_16; | |
304 | break; | |
305 | case 32: | |
306 | cr |= DWL_24; | |
307 | break; | |
308 | default: | |
309 | return -EIO; | |
310 | } | |
311 | ||
312 | if (rdai->bit_clk_inv) | |
313 | cr |= SCKP; | |
314 | if (rdai->frm_clk_inv) | |
315 | cr |= SWSP; | |
316 | if (rdai->data_alignment) | |
317 | cr |= SDTA; | |
318 | if (rdai->sys_delay) | |
319 | cr |= DEL; | |
985a4f6e | 320 | if (rsnd_io_is_play(io)) |
ae5c3223 KM |
321 | cr |= TRMD; |
322 | ||
323 | /* | |
324 | * set ssi parameter | |
325 | */ | |
ae5c3223 KM |
326 | ssi->cr_own = cr; |
327 | ssi->err = -1; /* ignore 1st error */ | |
328 | ||
ae5c3223 KM |
329 | return 0; |
330 | } | |
331 | ||
332 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
2c0fac19 | 333 | struct rsnd_dai_stream *io, |
690602fc | 334 | struct rsnd_priv *priv) |
ae5c3223 KM |
335 | { |
336 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
337 | struct device *dev = rsnd_priv_to_dev(priv); |
338 | ||
ae5c3223 | 339 | if (ssi->err > 0) |
337b0b4c KM |
340 | dev_warn(dev, "%s[%d] under/over flow err = %d\n", |
341 | rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err); | |
ae5c3223 | 342 | |
ae5c3223 KM |
343 | ssi->cr_own = 0; |
344 | ssi->err = 0; | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
919567d9 | 349 | static int rsnd_ssi_hw_params(struct rsnd_mod *mod, |
2c0fac19 | 350 | struct rsnd_dai_stream *io, |
919567d9 KM |
351 | struct snd_pcm_substream *substream, |
352 | struct snd_pcm_hw_params *params) | |
353 | { | |
354 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
355 | struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); | |
356 | int chan = params_channels(params); | |
357 | ||
358 | /* | |
359 | * Already working. | |
360 | * It will happen if SSI has parent/child connection. | |
361 | */ | |
362 | if (ssi->usrcnt) { | |
363 | /* | |
364 | * it is error if child <-> parent SSI uses | |
365 | * different channels. | |
366 | */ | |
367 | if (ssi->chan != chan) | |
368 | return -EIO; | |
369 | } | |
370 | ||
371 | /* It will be removed on rsnd_ssi_hw_stop */ | |
372 | ssi->chan = chan; | |
373 | if (ssi_parent) | |
2c0fac19 KM |
374 | return rsnd_ssi_hw_params(&ssi_parent->mod, io, |
375 | substream, params); | |
919567d9 KM |
376 | |
377 | return 0; | |
378 | } | |
379 | ||
ae5c3223 KM |
380 | static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) |
381 | { | |
382 | /* under/over flow error */ | |
383 | if (status & (UIRQ | OIRQ)) { | |
384 | ssi->err++; | |
385 | ||
386 | /* clear error status */ | |
387 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
388 | } | |
389 | } | |
390 | ||
4e7d606c | 391 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
2c0fac19 | 392 | struct rsnd_dai_stream *io, |
690602fc | 393 | struct rsnd_priv *priv) |
4e7d606c KM |
394 | { |
395 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
4e7d606c | 396 | |
bfc0cfe6 | 397 | rsnd_src_ssiu_start(mod, io, rsnd_ssi_use_busif(io, mod)); |
4e7d606c | 398 | |
f708d944 | 399 | rsnd_ssi_hw_start(ssi, io); |
4e7d606c | 400 | |
f708d944 | 401 | rsnd_src_ssi_irq_enable(mod); |
4e7d606c KM |
402 | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static int rsnd_ssi_stop(struct rsnd_mod *mod, | |
2c0fac19 | 407 | struct rsnd_dai_stream *io, |
690602fc | 408 | struct rsnd_priv *priv) |
4e7d606c KM |
409 | { |
410 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
411 | ||
f708d944 | 412 | rsnd_src_ssi_irq_disable(mod); |
4e7d606c KM |
413 | |
414 | rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR)); | |
415 | ||
bfc0cfe6 | 416 | rsnd_ssi_hw_stop(io, ssi); |
4e7d606c | 417 | |
4e2639ff | 418 | rsnd_src_ssiu_stop(mod, io); |
4e7d606c KM |
419 | |
420 | return 0; | |
421 | } | |
422 | ||
bfc0cfe6 KM |
423 | static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, |
424 | struct rsnd_dai_stream *io) | |
ae5c3223 | 425 | { |
bfc0cfe6 | 426 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
690602fc | 427 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
765ae7c8 | 428 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
02299d98 | 429 | u32 status; |
75defee0 | 430 | bool elapsed = false; |
02299d98 KM |
431 | |
432 | spin_lock(&priv->lock); | |
ae5c3223 | 433 | |
02299d98 | 434 | /* ignore all cases if not working */ |
d5bbe7de | 435 | if (!rsnd_io_is_working(io)) |
02299d98 KM |
436 | goto rsnd_ssi_interrupt_out; |
437 | ||
438 | status = rsnd_mod_read(mod, SSISR); | |
4e7d606c KM |
439 | |
440 | /* PIO only */ | |
765ae7c8 | 441 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
442 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
443 | u32 *buf = (u32 *)(runtime->dma_area + | |
444 | rsnd_dai_pointer_offset(io, 0)); | |
445 | ||
ae5c3223 KM |
446 | /* |
447 | * 8/16/32 data can be assesse to TDR/RDR register | |
448 | * directly as 32bit data | |
449 | * see rsnd_ssi_init() | |
450 | */ | |
985a4f6e | 451 | if (rsnd_io_is_play(io)) |
4686a0ad | 452 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 453 | else |
4686a0ad | 454 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 | 455 | |
75defee0 | 456 | elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); |
4e7d606c | 457 | } |
ae5c3223 | 458 | |
12927a8f KM |
459 | /* DMA only */ |
460 | if (is_dma && (status & (UIRQ | OIRQ))) { | |
4e7d606c KM |
461 | struct device *dev = rsnd_priv_to_dev(priv); |
462 | ||
463 | /* | |
464 | * restart SSI | |
465 | */ | |
4e7d606c KM |
466 | dev_dbg(dev, "%s[%d] restart\n", |
467 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
044930b4 | 468 | |
2c0fac19 | 469 | rsnd_ssi_stop(mod, io, priv); |
044930b4 | 470 | if (ssi->err < 1024) |
2c0fac19 | 471 | rsnd_ssi_start(mod, io, priv); |
044930b4 KM |
472 | else |
473 | dev_warn(dev, "no more SSI restart\n"); | |
ae5c3223 KM |
474 | } |
475 | ||
4e7d606c KM |
476 | rsnd_ssi_record_error(ssi, status); |
477 | ||
02299d98 KM |
478 | rsnd_ssi_interrupt_out: |
479 | spin_unlock(&priv->lock); | |
480 | ||
75defee0 KM |
481 | if (elapsed) |
482 | rsnd_dai_period_elapsed(io); | |
bfc0cfe6 KM |
483 | } |
484 | ||
485 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) | |
486 | { | |
487 | struct rsnd_mod *mod = data; | |
488 | ||
489 | rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt); | |
75defee0 | 490 | |
4e7d606c | 491 | return IRQ_HANDLED; |
ae5c3223 KM |
492 | } |
493 | ||
6cfad789 KM |
494 | /* |
495 | * SSI PIO | |
496 | */ | |
ff8f30e6 | 497 | static int rsnd_ssi_pio_probe(struct rsnd_mod *mod, |
2c0fac19 | 498 | struct rsnd_dai_stream *io, |
690602fc | 499 | struct rsnd_priv *priv) |
ff8f30e6 | 500 | { |
ff8f30e6 KM |
501 | struct device *dev = rsnd_priv_to_dev(priv); |
502 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
503 | int ret; |
504 | ||
6cfad789 KM |
505 | ret = devm_request_irq(dev, ssi->info->irq, |
506 | rsnd_ssi_interrupt, | |
ff8f30e6 | 507 | IRQF_SHARED, |
bfc0cfe6 | 508 | dev_name(dev), mod); |
8aefda50 | 509 | |
ff8f30e6 KM |
510 | return ret; |
511 | } | |
512 | ||
ae5c3223 | 513 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 514 | .name = SSI_NAME, |
ff8f30e6 | 515 | .probe = rsnd_ssi_pio_probe, |
ae5c3223 KM |
516 | .init = rsnd_ssi_init, |
517 | .quit = rsnd_ssi_quit, | |
49229850 KM |
518 | .start = rsnd_ssi_start, |
519 | .stop = rsnd_ssi_stop, | |
919567d9 | 520 | .hw_params = rsnd_ssi_hw_params, |
ae5c3223 KM |
521 | }; |
522 | ||
ff8f30e6 | 523 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
2c0fac19 | 524 | struct rsnd_dai_stream *io, |
690602fc | 525 | struct rsnd_priv *priv) |
ff8f30e6 | 526 | { |
ff8f30e6 | 527 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
ff8f30e6 KM |
528 | struct device *dev = rsnd_priv_to_dev(priv); |
529 | int dma_id = ssi->info->dma_id; | |
ff8f30e6 KM |
530 | int ret; |
531 | ||
6cfad789 KM |
532 | ret = devm_request_irq(dev, ssi->info->irq, |
533 | rsnd_ssi_interrupt, | |
4e7d606c | 534 | IRQF_SHARED, |
bfc0cfe6 | 535 | dev_name(dev), mod); |
4e7d606c | 536 | if (ret) |
b543b52a | 537 | return ret; |
4e7d606c | 538 | |
ff8f30e6 | 539 | ret = rsnd_dma_init( |
9b99e9a7 | 540 | io, rsnd_mod_to_dma(mod), |
ff8f30e6 | 541 | dma_id); |
8aefda50 | 542 | |
ff8f30e6 KM |
543 | return ret; |
544 | } | |
545 | ||
546 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
2c0fac19 | 547 | struct rsnd_dai_stream *io, |
690602fc | 548 | struct rsnd_priv *priv) |
97463e19 | 549 | { |
4e7d606c KM |
550 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
551 | struct device *dev = rsnd_priv_to_dev(priv); | |
6cfad789 | 552 | int irq = ssi->info->irq; |
4e7d606c | 553 | |
9b99e9a7 | 554 | rsnd_dma_quit(io, rsnd_mod_to_dma(mod)); |
97463e19 | 555 | |
4e7d606c KM |
556 | /* PIO will request IRQ again */ |
557 | devm_free_irq(dev, irq, ssi); | |
558 | ||
97463e19 KM |
559 | return 0; |
560 | } | |
561 | ||
562 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
2c0fac19 | 563 | struct rsnd_dai_stream *io, |
690602fc | 564 | struct rsnd_priv *priv) |
ff8f30e6 | 565 | { |
d3a76823 KM |
566 | struct device *dev = rsnd_priv_to_dev(priv); |
567 | ||
d3a76823 KM |
568 | /* |
569 | * fallback to PIO | |
570 | * | |
571 | * SSI .probe might be called again. | |
572 | * see | |
573 | * rsnd_rdai_continuance_probe() | |
574 | */ | |
575 | mod->ops = &rsnd_ssi_pio_ops; | |
576 | ||
577 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
578 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
579 | ||
ff8f30e6 KM |
580 | return 0; |
581 | } | |
582 | ||
849fc82a | 583 | static int rsnd_ssi_dma_start(struct rsnd_mod *mod, |
2c0fac19 | 584 | struct rsnd_dai_stream *io, |
690602fc | 585 | struct rsnd_priv *priv) |
849fc82a | 586 | { |
49229850 | 587 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
d9288d0b | 588 | |
9b99e9a7 | 589 | rsnd_dma_start(io, dma); |
7b466fc6 | 590 | |
2c0fac19 | 591 | rsnd_ssi_start(mod, io, priv); |
1ceeab26 | 592 | |
849fc82a KM |
593 | return 0; |
594 | } | |
595 | ||
596 | static int rsnd_ssi_dma_stop(struct rsnd_mod *mod, | |
2c0fac19 | 597 | struct rsnd_dai_stream *io, |
690602fc | 598 | struct rsnd_priv *priv) |
849fc82a | 599 | { |
49229850 | 600 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
849fc82a | 601 | |
2c0fac19 | 602 | rsnd_ssi_stop(mod, io, priv); |
d9288d0b | 603 | |
9b99e9a7 | 604 | rsnd_dma_stop(io, dma); |
1ceeab26 | 605 | |
849fc82a KM |
606 | return 0; |
607 | } | |
608 | ||
9b99e9a7 KM |
609 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io, |
610 | struct rsnd_mod *mod) | |
d9288d0b | 611 | { |
72adc61f | 612 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
72adc61f KM |
613 | int is_play = rsnd_io_is_play(io); |
614 | char *name; | |
615 | ||
bfc0cfe6 | 616 | if (rsnd_ssi_use_busif(io, mod)) |
72adc61f KM |
617 | name = is_play ? "rxu" : "txu"; |
618 | else | |
619 | name = is_play ? "rx" : "tx"; | |
620 | ||
621 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
622 | mod, name); | |
d9288d0b KM |
623 | } |
624 | ||
849fc82a | 625 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 626 | .name = SSI_NAME, |
72adc61f | 627 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
628 | .probe = rsnd_ssi_dma_probe, |
629 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
630 | .init = rsnd_ssi_init, |
631 | .quit = rsnd_ssi_quit, | |
632 | .start = rsnd_ssi_dma_start, | |
633 | .stop = rsnd_ssi_dma_stop, | |
97463e19 | 634 | .fallback = rsnd_ssi_fallback, |
919567d9 | 635 | .hw_params = rsnd_ssi_hw_params, |
849fc82a KM |
636 | }; |
637 | ||
05795411 KM |
638 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
639 | { | |
640 | return mod->ops == &rsnd_ssi_dma_ops; | |
641 | } | |
642 | ||
643 | ||
ae5c3223 KM |
644 | /* |
645 | * Non SSI | |
646 | */ | |
ae5c3223 | 647 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 648 | .name = SSI_NAME, |
ae5c3223 KM |
649 | }; |
650 | ||
651 | /* | |
652 | * ssi mod function | |
653 | */ | |
654 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) | |
655 | { | |
8b14719b TI |
656 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
657 | id = 0; | |
ae5c3223 | 658 | |
dd27d808 | 659 | return &((struct rsnd_ssi *)(priv->ssi) + id)->mod; |
ae5c3223 KM |
660 | } |
661 | ||
7b5ce975 KM |
662 | int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
663 | { | |
664 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
665 | ||
666 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
667 | } | |
668 | ||
8c5c79a1 | 669 | static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi) |
7b5ce975 KM |
670 | { |
671 | if (!rsnd_ssi_is_pin_sharing(&ssi->mod)) | |
672 | return; | |
673 | ||
674 | switch (rsnd_mod_id(&ssi->mod)) { | |
675 | case 1: | |
676 | case 2: | |
677 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0)); | |
678 | break; | |
679 | case 4: | |
680 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3)); | |
681 | break; | |
682 | case 8: | |
683 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7)); | |
684 | break; | |
685 | } | |
686 | } | |
687 | ||
90e8e50f KM |
688 | |
689 | static void rsnd_of_parse_ssi(struct platform_device *pdev, | |
690 | const struct rsnd_of_data *of_data, | |
691 | struct rsnd_priv *priv) | |
692 | { | |
693 | struct device_node *node; | |
694 | struct device_node *np; | |
695 | struct rsnd_ssi_platform_info *ssi_info; | |
696 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); | |
697 | struct device *dev = &pdev->dev; | |
698 | int nr, i; | |
699 | ||
700 | if (!of_data) | |
701 | return; | |
702 | ||
04e627ba | 703 | node = rsnd_ssi_of_node(priv); |
90e8e50f KM |
704 | if (!node) |
705 | return; | |
706 | ||
707 | nr = of_get_child_count(node); | |
708 | if (!nr) | |
f451e48d | 709 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
710 | |
711 | ssi_info = devm_kzalloc(dev, | |
712 | sizeof(struct rsnd_ssi_platform_info) * nr, | |
713 | GFP_KERNEL); | |
714 | if (!ssi_info) { | |
715 | dev_err(dev, "ssi info allocation error\n"); | |
f451e48d | 716 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
717 | } |
718 | ||
719 | info->ssi_info = ssi_info; | |
720 | info->ssi_info_nr = nr; | |
721 | ||
722 | i = -1; | |
723 | for_each_child_of_node(node, np) { | |
724 | i++; | |
725 | ||
726 | ssi_info = info->ssi_info + i; | |
727 | ||
728 | /* | |
729 | * pin settings | |
730 | */ | |
731 | if (of_get_property(np, "shared-pin", NULL)) | |
732 | ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE; | |
733 | ||
734 | /* | |
735 | * irq | |
736 | */ | |
6cfad789 | 737 | ssi_info->irq = irq_of_parse_and_map(np, 0); |
199e7688 KM |
738 | |
739 | /* | |
740 | * DMA | |
741 | */ | |
742 | ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ? | |
743 | 0 : 1; | |
d9288d0b KM |
744 | |
745 | if (of_get_property(np, "no-busif", NULL)) | |
746 | ssi_info->flags |= RSND_SSI_NO_BUSIF; | |
90e8e50f | 747 | } |
f451e48d KM |
748 | |
749 | rsnd_of_parse_ssi_end: | |
750 | of_node_put(node); | |
90e8e50f KM |
751 | } |
752 | ||
ae5c3223 | 753 | int rsnd_ssi_probe(struct platform_device *pdev, |
90e8e50f | 754 | const struct rsnd_of_data *of_data, |
ae5c3223 KM |
755 | struct rsnd_priv *priv) |
756 | { | |
5da39cf3 | 757 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
ae5c3223 KM |
758 | struct rsnd_ssi_platform_info *pinfo; |
759 | struct device *dev = rsnd_priv_to_dev(priv); | |
760 | struct rsnd_mod_ops *ops; | |
761 | struct clk *clk; | |
ae5c3223 KM |
762 | struct rsnd_ssi *ssi; |
763 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 764 | int i, nr, ret; |
ae5c3223 | 765 | |
90e8e50f KM |
766 | rsnd_of_parse_ssi(pdev, of_data, priv); |
767 | ||
ae5c3223 KM |
768 | /* |
769 | * init SSI | |
770 | */ | |
771 | nr = info->ssi_info_nr; | |
dd27d808 | 772 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
afa70072 | 773 | if (!ssi) |
ae5c3223 | 774 | return -ENOMEM; |
ae5c3223 | 775 | |
dd27d808 KM |
776 | priv->ssi = ssi; |
777 | priv->ssi_nr = nr; | |
ae5c3223 KM |
778 | |
779 | for_each_rsnd_ssi(ssi, priv, i) { | |
780 | pinfo = &info->ssi_info[i]; | |
781 | ||
8aefda50 KM |
782 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
783 | SSI_NAME, i); | |
ae5c3223 | 784 | |
60dbb4f1 | 785 | clk = devm_clk_get(dev, name); |
ae5c3223 KM |
786 | if (IS_ERR(clk)) |
787 | return PTR_ERR(clk); | |
788 | ||
789 | ssi->info = pinfo; | |
ae5c3223 KM |
790 | |
791 | ops = &rsnd_ssi_non_ops; | |
ff8f30e6 KM |
792 | if (pinfo->dma_id > 0) |
793 | ops = &rsnd_ssi_dma_ops; | |
794 | else if (rsnd_ssi_pio_available(ssi)) | |
795 | ops = &rsnd_ssi_pio_ops; | |
ae5c3223 | 796 | |
2099bc8e | 797 | ret = rsnd_mod_init(priv, &ssi->mod, ops, clk, RSND_MOD_SSI, i); |
2f78dd7f KM |
798 | if (ret) |
799 | return ret; | |
7b5ce975 | 800 | |
8c5c79a1 | 801 | rsnd_ssi_parent_setup(priv, ssi); |
ae5c3223 KM |
802 | } |
803 | ||
ae5c3223 KM |
804 | return 0; |
805 | } | |
2f78dd7f KM |
806 | |
807 | void rsnd_ssi_remove(struct platform_device *pdev, | |
808 | struct rsnd_priv *priv) | |
809 | { | |
810 | struct rsnd_ssi *ssi; | |
811 | int i; | |
812 | ||
813 | for_each_rsnd_ssi(ssi, priv, i) { | |
814 | rsnd_mod_quit(&ssi->mod); | |
815 | } | |
816 | } |