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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) |
ae5c3223 | 83 | #define rsnd_ssi_clk_from_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)) { |
ae5c3223 | 192 | if (rsnd_ssi_clk_from_parent(ssi)) |
f708d944 | 193 | rsnd_ssi_hw_start(ssi->parent, io); |
ae5c3223 | 194 | else |
adcf7d5e | 195 | rsnd_ssi_master_clk_start(ssi, io); |
ae5c3223 KM |
196 | } |
197 | } | |
198 | ||
05795411 | 199 | cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ? |
4e7d606c KM |
200 | DMEN : /* DMA : enable DMA */ |
201 | DIEN; /* PIO : enable Data interrupt */ | |
05795411 KM |
202 | |
203 | ||
ae5c3223 KM |
204 | cr = ssi->cr_own | |
205 | ssi->cr_clk | | |
05795411 | 206 | cr_mode | |
4e7d606c | 207 | UIEN | OIEN | EN; |
ae5c3223 KM |
208 | |
209 | rsnd_mod_write(&ssi->mod, SSICR, cr); | |
210 | ||
d1b64056 | 211 | /* enable WS continue */ |
3ed6448c | 212 | if (rsnd_rdai_is_clk_master(rdai)) |
d1b64056 KM |
213 | rsnd_mod_write(&ssi->mod, SSIWSR, CONT); |
214 | ||
3ba84f45 KM |
215 | /* clear error status */ |
216 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
217 | ||
ae5c3223 KM |
218 | ssi->usrcnt++; |
219 | ||
30cc4faf KM |
220 | dev_dbg(dev, "%s[%d] hw started\n", |
221 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
222 | } |
223 | ||
f708d944 | 224 | static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi) |
ae5c3223 KM |
225 | { |
226 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); | |
f708d944 KM |
227 | struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod); |
228 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
ae5c3223 KM |
229 | struct device *dev = rsnd_priv_to_dev(priv); |
230 | u32 cr; | |
231 | ||
232 | if (0 == ssi->usrcnt) /* stop might be called without start */ | |
233 | return; | |
234 | ||
235 | ssi->usrcnt--; | |
236 | ||
237 | if (0 == ssi->usrcnt) { | |
238 | /* | |
239 | * disable all IRQ, | |
240 | * and, wait all data was sent | |
241 | */ | |
242 | cr = ssi->cr_own | | |
243 | ssi->cr_clk; | |
244 | ||
245 | rsnd_mod_write(&ssi->mod, SSICR, cr | EN); | |
246 | rsnd_ssi_status_check(&ssi->mod, DIRQ); | |
247 | ||
248 | /* | |
249 | * disable SSI, | |
250 | * and, wait idle state | |
251 | */ | |
252 | rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */ | |
253 | rsnd_ssi_status_check(&ssi->mod, IIRQ); | |
254 | ||
3ed6448c | 255 | if (rsnd_rdai_is_clk_master(rdai)) { |
ae5c3223 | 256 | if (rsnd_ssi_clk_from_parent(ssi)) |
f708d944 | 257 | rsnd_ssi_hw_stop(ssi->parent); |
ae5c3223 KM |
258 | else |
259 | rsnd_ssi_master_clk_stop(ssi); | |
260 | } | |
261 | ||
85642952 | 262 | rsnd_mod_hw_stop(&ssi->mod); |
ae5c3223 KM |
263 | } |
264 | ||
30cc4faf KM |
265 | dev_dbg(dev, "%s[%d] hw stopped\n", |
266 | rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); | |
ae5c3223 KM |
267 | } |
268 | ||
269 | /* | |
270 | * SSI mod common functions | |
271 | */ | |
272 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
690602fc | 273 | struct rsnd_priv *priv) |
ae5c3223 KM |
274 | { |
275 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
b42fccf6 | 276 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); |
690602fc | 277 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
ae5c3223 KM |
278 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
279 | u32 cr; | |
280 | ||
281 | cr = FORCE; | |
282 | ||
283 | /* | |
284 | * always use 32bit system word for easy clock calculation. | |
285 | * see also rsnd_ssi_master_clk_enable() | |
286 | */ | |
287 | cr |= SWL_32; | |
288 | ||
289 | /* | |
290 | * init clock settings for SSICR | |
291 | */ | |
292 | switch (runtime->sample_bits) { | |
293 | case 16: | |
294 | cr |= DWL_16; | |
295 | break; | |
296 | case 32: | |
297 | cr |= DWL_24; | |
298 | break; | |
299 | default: | |
300 | return -EIO; | |
301 | } | |
302 | ||
303 | if (rdai->bit_clk_inv) | |
304 | cr |= SCKP; | |
305 | if (rdai->frm_clk_inv) | |
306 | cr |= SWSP; | |
307 | if (rdai->data_alignment) | |
308 | cr |= SDTA; | |
309 | if (rdai->sys_delay) | |
310 | cr |= DEL; | |
985a4f6e | 311 | if (rsnd_io_is_play(io)) |
ae5c3223 KM |
312 | cr |= TRMD; |
313 | ||
314 | /* | |
315 | * set ssi parameter | |
316 | */ | |
ae5c3223 KM |
317 | ssi->cr_own = cr; |
318 | ssi->err = -1; /* ignore 1st error */ | |
319 | ||
ae5c3223 KM |
320 | return 0; |
321 | } | |
322 | ||
323 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
690602fc | 324 | struct rsnd_priv *priv) |
ae5c3223 KM |
325 | { |
326 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
327 | struct device *dev = rsnd_priv_to_dev(priv); |
328 | ||
ae5c3223 | 329 | if (ssi->err > 0) |
337b0b4c KM |
330 | dev_warn(dev, "%s[%d] under/over flow err = %d\n", |
331 | rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err); | |
ae5c3223 | 332 | |
ae5c3223 KM |
333 | ssi->cr_own = 0; |
334 | ssi->err = 0; | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) | |
340 | { | |
341 | /* under/over flow error */ | |
342 | if (status & (UIRQ | OIRQ)) { | |
343 | ssi->err++; | |
344 | ||
345 | /* clear error status */ | |
346 | rsnd_mod_write(&ssi->mod, SSISR, 0); | |
347 | } | |
348 | } | |
349 | ||
4e7d606c | 350 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
690602fc | 351 | struct rsnd_priv *priv) |
4e7d606c KM |
352 | { |
353 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
354 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
355 | ||
f708d944 | 356 | rsnd_src_ssiu_start(mod, rsnd_ssi_use_busif(mod)); |
4e7d606c | 357 | |
f708d944 | 358 | rsnd_ssi_hw_start(ssi, io); |
4e7d606c | 359 | |
f708d944 | 360 | rsnd_src_ssi_irq_enable(mod); |
4e7d606c KM |
361 | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static int rsnd_ssi_stop(struct rsnd_mod *mod, | |
690602fc | 366 | struct rsnd_priv *priv) |
4e7d606c KM |
367 | { |
368 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
369 | ||
f708d944 | 370 | rsnd_src_ssi_irq_disable(mod); |
4e7d606c KM |
371 | |
372 | rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR)); | |
373 | ||
f708d944 | 374 | rsnd_ssi_hw_stop(ssi); |
4e7d606c | 375 | |
f708d944 | 376 | rsnd_src_ssiu_stop(mod); |
4e7d606c KM |
377 | |
378 | return 0; | |
379 | } | |
380 | ||
6cfad789 | 381 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) |
ae5c3223 KM |
382 | { |
383 | struct rsnd_ssi *ssi = data; | |
4686a0ad | 384 | struct rsnd_mod *mod = &ssi->mod; |
690602fc | 385 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
4686a0ad | 386 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); |
765ae7c8 | 387 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
4686a0ad | 388 | u32 status = rsnd_mod_read(mod, SSISR); |
ae5c3223 | 389 | |
4e7d606c KM |
390 | if (!io) |
391 | return IRQ_NONE; | |
392 | ||
393 | /* PIO only */ | |
765ae7c8 | 394 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
395 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
396 | u32 *buf = (u32 *)(runtime->dma_area + | |
397 | rsnd_dai_pointer_offset(io, 0)); | |
398 | ||
ae5c3223 KM |
399 | /* |
400 | * 8/16/32 data can be assesse to TDR/RDR register | |
401 | * directly as 32bit data | |
402 | * see rsnd_ssi_init() | |
403 | */ | |
985a4f6e | 404 | if (rsnd_io_is_play(io)) |
4686a0ad | 405 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 406 | else |
4686a0ad | 407 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 KM |
408 | |
409 | rsnd_dai_pointer_update(io, sizeof(*buf)); | |
4e7d606c | 410 | } |
ae5c3223 | 411 | |
4e7d606c KM |
412 | /* PIO / DMA */ |
413 | if (status & (UIRQ | OIRQ)) { | |
4e7d606c KM |
414 | struct device *dev = rsnd_priv_to_dev(priv); |
415 | ||
416 | /* | |
417 | * restart SSI | |
418 | */ | |
4e7d606c KM |
419 | dev_dbg(dev, "%s[%d] restart\n", |
420 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
044930b4 KM |
421 | |
422 | rsnd_ssi_stop(mod, priv); | |
423 | if (ssi->err < 1024) | |
424 | rsnd_ssi_start(mod, priv); | |
425 | else | |
426 | dev_warn(dev, "no more SSI restart\n"); | |
ae5c3223 KM |
427 | } |
428 | ||
4e7d606c KM |
429 | rsnd_ssi_record_error(ssi, status); |
430 | ||
431 | return IRQ_HANDLED; | |
ae5c3223 KM |
432 | } |
433 | ||
6cfad789 KM |
434 | /* |
435 | * SSI PIO | |
436 | */ | |
ff8f30e6 | 437 | static int rsnd_ssi_pio_probe(struct rsnd_mod *mod, |
690602fc | 438 | struct rsnd_priv *priv) |
ff8f30e6 | 439 | { |
ff8f30e6 KM |
440 | struct device *dev = rsnd_priv_to_dev(priv); |
441 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
442 | int ret; |
443 | ||
6cfad789 KM |
444 | ret = devm_request_irq(dev, ssi->info->irq, |
445 | rsnd_ssi_interrupt, | |
ff8f30e6 KM |
446 | IRQF_SHARED, |
447 | dev_name(dev), ssi); | |
448 | if (ret) | |
30cc4faf KM |
449 | dev_err(dev, "%s[%d] (PIO) request interrupt failed\n", |
450 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
451 | else | |
452 | dev_dbg(dev, "%s[%d] (PIO) is probed\n", | |
453 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
8aefda50 | 454 | |
ff8f30e6 KM |
455 | return ret; |
456 | } | |
457 | ||
ae5c3223 | 458 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 459 | .name = SSI_NAME, |
ff8f30e6 | 460 | .probe = rsnd_ssi_pio_probe, |
ae5c3223 KM |
461 | .init = rsnd_ssi_init, |
462 | .quit = rsnd_ssi_quit, | |
49229850 KM |
463 | .start = rsnd_ssi_start, |
464 | .stop = rsnd_ssi_stop, | |
ae5c3223 KM |
465 | }; |
466 | ||
ff8f30e6 | 467 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
690602fc | 468 | struct rsnd_priv *priv) |
ff8f30e6 | 469 | { |
ff8f30e6 | 470 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
ff8f30e6 KM |
471 | struct device *dev = rsnd_priv_to_dev(priv); |
472 | int dma_id = ssi->info->dma_id; | |
ff8f30e6 KM |
473 | int ret; |
474 | ||
6cfad789 KM |
475 | ret = devm_request_irq(dev, ssi->info->irq, |
476 | rsnd_ssi_interrupt, | |
4e7d606c KM |
477 | IRQF_SHARED, |
478 | dev_name(dev), ssi); | |
479 | if (ret) | |
480 | goto rsnd_ssi_dma_probe_fail; | |
481 | ||
ff8f30e6 KM |
482 | ret = rsnd_dma_init( |
483 | priv, rsnd_mod_to_dma(mod), | |
ff8f30e6 | 484 | dma_id); |
4e7d606c KM |
485 | if (ret) |
486 | goto rsnd_ssi_dma_probe_fail; | |
ff8f30e6 | 487 | |
4e7d606c KM |
488 | dev_dbg(dev, "%s[%d] (DMA) is probed\n", |
489 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
490 | ||
491 | return ret; | |
492 | ||
493 | rsnd_ssi_dma_probe_fail: | |
494 | dev_err(dev, "%s[%d] (DMA) is failed\n", | |
495 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
8aefda50 | 496 | |
ff8f30e6 KM |
497 | return ret; |
498 | } | |
499 | ||
500 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
690602fc | 501 | struct rsnd_priv *priv) |
97463e19 | 502 | { |
4e7d606c KM |
503 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
504 | struct device *dev = rsnd_priv_to_dev(priv); | |
6cfad789 | 505 | int irq = ssi->info->irq; |
4e7d606c | 506 | |
8a2ff426 | 507 | rsnd_dma_quit(rsnd_mod_to_dma(mod)); |
97463e19 | 508 | |
4e7d606c KM |
509 | /* PIO will request IRQ again */ |
510 | devm_free_irq(dev, irq, ssi); | |
511 | ||
97463e19 KM |
512 | return 0; |
513 | } | |
514 | ||
515 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
690602fc | 516 | struct rsnd_priv *priv) |
ff8f30e6 | 517 | { |
d3a76823 KM |
518 | struct device *dev = rsnd_priv_to_dev(priv); |
519 | ||
d3a76823 KM |
520 | /* |
521 | * fallback to PIO | |
522 | * | |
523 | * SSI .probe might be called again. | |
524 | * see | |
525 | * rsnd_rdai_continuance_probe() | |
526 | */ | |
527 | mod->ops = &rsnd_ssi_pio_ops; | |
528 | ||
529 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
530 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
531 | ||
ff8f30e6 KM |
532 | return 0; |
533 | } | |
534 | ||
849fc82a | 535 | static int rsnd_ssi_dma_start(struct rsnd_mod *mod, |
690602fc | 536 | struct rsnd_priv *priv) |
849fc82a | 537 | { |
49229850 | 538 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
d9288d0b | 539 | |
7b466fc6 KM |
540 | rsnd_dma_start(dma); |
541 | ||
1ceeab26 KM |
542 | rsnd_ssi_start(mod, priv); |
543 | ||
849fc82a KM |
544 | return 0; |
545 | } | |
546 | ||
547 | static int rsnd_ssi_dma_stop(struct rsnd_mod *mod, | |
690602fc | 548 | struct rsnd_priv *priv) |
849fc82a | 549 | { |
49229850 | 550 | struct rsnd_dma *dma = rsnd_mod_to_dma(mod); |
849fc82a | 551 | |
690602fc | 552 | rsnd_ssi_stop(mod, priv); |
d9288d0b | 553 | |
1ceeab26 KM |
554 | rsnd_dma_stop(dma); |
555 | ||
849fc82a KM |
556 | return 0; |
557 | } | |
558 | ||
72adc61f | 559 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_mod *mod) |
d9288d0b | 560 | { |
72adc61f KM |
561 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
562 | struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); | |
563 | int is_play = rsnd_io_is_play(io); | |
564 | char *name; | |
565 | ||
566 | if (rsnd_ssi_use_busif(mod)) | |
567 | name = is_play ? "rxu" : "txu"; | |
568 | else | |
569 | name = is_play ? "rx" : "tx"; | |
570 | ||
571 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
572 | mod, name); | |
d9288d0b KM |
573 | } |
574 | ||
849fc82a | 575 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 576 | .name = SSI_NAME, |
72adc61f | 577 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
578 | .probe = rsnd_ssi_dma_probe, |
579 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
580 | .init = rsnd_ssi_init, |
581 | .quit = rsnd_ssi_quit, | |
582 | .start = rsnd_ssi_dma_start, | |
583 | .stop = rsnd_ssi_dma_stop, | |
97463e19 | 584 | .fallback = rsnd_ssi_fallback, |
849fc82a KM |
585 | }; |
586 | ||
05795411 KM |
587 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
588 | { | |
589 | return mod->ops == &rsnd_ssi_dma_ops; | |
590 | } | |
591 | ||
592 | ||
ae5c3223 KM |
593 | /* |
594 | * Non SSI | |
595 | */ | |
ae5c3223 | 596 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 597 | .name = SSI_NAME, |
ae5c3223 KM |
598 | }; |
599 | ||
600 | /* | |
601 | * ssi mod function | |
602 | */ | |
603 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) | |
604 | { | |
8b14719b TI |
605 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
606 | id = 0; | |
ae5c3223 | 607 | |
dd27d808 | 608 | return &((struct rsnd_ssi *)(priv->ssi) + id)->mod; |
ae5c3223 KM |
609 | } |
610 | ||
7b5ce975 KM |
611 | int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
612 | { | |
613 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
614 | ||
615 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
616 | } | |
617 | ||
618 | static void rsnd_ssi_parent_clk_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi) | |
619 | { | |
620 | if (!rsnd_ssi_is_pin_sharing(&ssi->mod)) | |
621 | return; | |
622 | ||
623 | switch (rsnd_mod_id(&ssi->mod)) { | |
624 | case 1: | |
625 | case 2: | |
626 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0)); | |
627 | break; | |
628 | case 4: | |
629 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3)); | |
630 | break; | |
631 | case 8: | |
632 | ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7)); | |
633 | break; | |
634 | } | |
635 | } | |
636 | ||
90e8e50f KM |
637 | |
638 | static void rsnd_of_parse_ssi(struct platform_device *pdev, | |
639 | const struct rsnd_of_data *of_data, | |
640 | struct rsnd_priv *priv) | |
641 | { | |
642 | struct device_node *node; | |
643 | struct device_node *np; | |
644 | struct rsnd_ssi_platform_info *ssi_info; | |
645 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); | |
646 | struct device *dev = &pdev->dev; | |
647 | int nr, i; | |
648 | ||
649 | if (!of_data) | |
650 | return; | |
651 | ||
04e627ba | 652 | node = rsnd_ssi_of_node(priv); |
90e8e50f KM |
653 | if (!node) |
654 | return; | |
655 | ||
656 | nr = of_get_child_count(node); | |
657 | if (!nr) | |
f451e48d | 658 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
659 | |
660 | ssi_info = devm_kzalloc(dev, | |
661 | sizeof(struct rsnd_ssi_platform_info) * nr, | |
662 | GFP_KERNEL); | |
663 | if (!ssi_info) { | |
664 | dev_err(dev, "ssi info allocation error\n"); | |
f451e48d | 665 | goto rsnd_of_parse_ssi_end; |
90e8e50f KM |
666 | } |
667 | ||
668 | info->ssi_info = ssi_info; | |
669 | info->ssi_info_nr = nr; | |
670 | ||
671 | i = -1; | |
672 | for_each_child_of_node(node, np) { | |
673 | i++; | |
674 | ||
675 | ssi_info = info->ssi_info + i; | |
676 | ||
677 | /* | |
678 | * pin settings | |
679 | */ | |
680 | if (of_get_property(np, "shared-pin", NULL)) | |
681 | ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE; | |
682 | ||
683 | /* | |
684 | * irq | |
685 | */ | |
6cfad789 | 686 | ssi_info->irq = irq_of_parse_and_map(np, 0); |
199e7688 KM |
687 | |
688 | /* | |
689 | * DMA | |
690 | */ | |
691 | ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ? | |
692 | 0 : 1; | |
d9288d0b KM |
693 | |
694 | if (of_get_property(np, "no-busif", NULL)) | |
695 | ssi_info->flags |= RSND_SSI_NO_BUSIF; | |
90e8e50f | 696 | } |
f451e48d KM |
697 | |
698 | rsnd_of_parse_ssi_end: | |
699 | of_node_put(node); | |
90e8e50f KM |
700 | } |
701 | ||
ae5c3223 | 702 | int rsnd_ssi_probe(struct platform_device *pdev, |
90e8e50f | 703 | const struct rsnd_of_data *of_data, |
ae5c3223 KM |
704 | struct rsnd_priv *priv) |
705 | { | |
5da39cf3 | 706 | struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
ae5c3223 KM |
707 | struct rsnd_ssi_platform_info *pinfo; |
708 | struct device *dev = rsnd_priv_to_dev(priv); | |
709 | struct rsnd_mod_ops *ops; | |
710 | struct clk *clk; | |
ae5c3223 KM |
711 | struct rsnd_ssi *ssi; |
712 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 713 | int i, nr, ret; |
ae5c3223 | 714 | |
90e8e50f KM |
715 | rsnd_of_parse_ssi(pdev, of_data, priv); |
716 | ||
ae5c3223 KM |
717 | /* |
718 | * init SSI | |
719 | */ | |
720 | nr = info->ssi_info_nr; | |
dd27d808 KM |
721 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
722 | if (!ssi) { | |
ae5c3223 KM |
723 | dev_err(dev, "SSI allocate failed\n"); |
724 | return -ENOMEM; | |
725 | } | |
726 | ||
dd27d808 KM |
727 | priv->ssi = ssi; |
728 | priv->ssi_nr = nr; | |
ae5c3223 KM |
729 | |
730 | for_each_rsnd_ssi(ssi, priv, i) { | |
731 | pinfo = &info->ssi_info[i]; | |
732 | ||
8aefda50 KM |
733 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
734 | SSI_NAME, i); | |
ae5c3223 | 735 | |
60dbb4f1 | 736 | clk = devm_clk_get(dev, name); |
ae5c3223 KM |
737 | if (IS_ERR(clk)) |
738 | return PTR_ERR(clk); | |
739 | ||
740 | ssi->info = pinfo; | |
ae5c3223 KM |
741 | |
742 | ops = &rsnd_ssi_non_ops; | |
ff8f30e6 KM |
743 | if (pinfo->dma_id > 0) |
744 | ops = &rsnd_ssi_dma_ops; | |
745 | else if (rsnd_ssi_pio_available(ssi)) | |
746 | ops = &rsnd_ssi_pio_ops; | |
ae5c3223 | 747 | |
2f78dd7f KM |
748 | ret = rsnd_mod_init(&ssi->mod, ops, clk, RSND_MOD_SSI, i); |
749 | if (ret) | |
750 | return ret; | |
7b5ce975 KM |
751 | |
752 | rsnd_ssi_parent_clk_setup(priv, ssi); | |
ae5c3223 KM |
753 | } |
754 | ||
ae5c3223 KM |
755 | return 0; |
756 | } | |
2f78dd7f KM |
757 | |
758 | void rsnd_ssi_remove(struct platform_device *pdev, | |
759 | struct rsnd_priv *priv) | |
760 | { | |
761 | struct rsnd_ssi *ssi; | |
762 | int i; | |
763 | ||
764 | for_each_rsnd_ssi(ssi, priv, i) { | |
765 | rsnd_mod_quit(&ssi->mod); | |
766 | } | |
767 | } |