Commit | Line | Data |
---|---|---|
ae5c3223 KM |
1 | /* |
2 | * Renesas R-Car SSIU/SSI support | |
3 | * | |
4 | * Copyright (C) 2013 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * Based on fsi.c | |
8 | * Kuninori Morimoto <morimoto.kuninori@renesas.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | #include <linux/delay.h> | |
15 | #include "rsnd.h" | |
16 | #define RSND_SSI_NAME_SIZE 16 | |
17 | ||
18 | /* | |
19 | * SSICR | |
20 | */ | |
21 | #define FORCE (1 << 31) /* Fixed */ | |
849fc82a | 22 | #define DMEN (1 << 28) /* DMA Enable */ |
ae5c3223 KM |
23 | #define UIEN (1 << 27) /* Underflow Interrupt Enable */ |
24 | #define OIEN (1 << 26) /* Overflow Interrupt Enable */ | |
25 | #define IIEN (1 << 25) /* Idle Mode Interrupt Enable */ | |
26 | #define DIEN (1 << 24) /* Data Interrupt Enable */ | |
186fadc1 KM |
27 | #define CHNL_4 (1 << 22) /* Channels */ |
28 | #define CHNL_6 (2 << 22) /* Channels */ | |
29 | #define CHNL_8 (3 << 22) /* Channels */ | |
ae5c3223 KM |
30 | #define DWL_8 (0 << 19) /* Data Word Length */ |
31 | #define DWL_16 (1 << 19) /* Data Word Length */ | |
32 | #define DWL_18 (2 << 19) /* Data Word Length */ | |
33 | #define DWL_20 (3 << 19) /* Data Word Length */ | |
34 | #define DWL_22 (4 << 19) /* Data Word Length */ | |
35 | #define DWL_24 (5 << 19) /* Data Word Length */ | |
36 | #define DWL_32 (6 << 19) /* Data Word Length */ | |
37 | ||
38 | #define SWL_32 (3 << 16) /* R/W System Word Length */ | |
39 | #define SCKD (1 << 15) /* Serial Bit Clock Direction */ | |
40 | #define SWSD (1 << 14) /* Serial WS Direction */ | |
41 | #define SCKP (1 << 13) /* Serial Bit Clock Polarity */ | |
42 | #define SWSP (1 << 12) /* Serial WS Polarity */ | |
43 | #define SDTA (1 << 10) /* Serial Data Alignment */ | |
f46a93b8 | 44 | #define PDTA (1 << 9) /* Parallel Data Alignment */ |
ae5c3223 KM |
45 | #define DEL (1 << 8) /* Serial Data Delay */ |
46 | #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */ | |
47 | #define TRMD (1 << 1) /* Transmit/Receive Mode Select */ | |
48 | #define EN (1 << 0) /* SSI Module Enable */ | |
49 | ||
50 | /* | |
51 | * SSISR | |
52 | */ | |
53 | #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */ | |
54 | #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */ | |
55 | #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */ | |
56 | #define DIRQ (1 << 24) /* Data Interrupt Status Flag */ | |
57 | ||
849fc82a KM |
58 | /* |
59 | * SSIWSR | |
60 | */ | |
61 | #define CONT (1 << 8) /* WS Continue Function */ | |
186fadc1 | 62 | #define WS_MODE (1 << 0) /* WS Mode */ |
849fc82a | 63 | |
8aefda50 KM |
64 | #define SSI_NAME "ssi" |
65 | ||
ae5c3223 | 66 | struct rsnd_ssi { |
ae5c3223 | 67 | struct rsnd_mod mod; |
940e9479 | 68 | struct rsnd_mod *dma; |
ae5c3223 | 69 | |
02534f2f | 70 | u32 flags; |
ae5c3223 KM |
71 | u32 cr_own; |
72 | u32 cr_clk; | |
e7d850dd | 73 | u32 cr_mode; |
08bada26 | 74 | u32 wsr; |
919567d9 | 75 | int chan; |
e7d850dd | 76 | int rate; |
02534f2f | 77 | int irq; |
ae5c3223 | 78 | unsigned int usrcnt; |
ae5c3223 KM |
79 | }; |
80 | ||
02534f2f KM |
81 | /* flags */ |
82 | #define RSND_SSI_CLK_PIN_SHARE (1 << 0) | |
83 | #define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */ | |
84 | ||
ae5c3223 KM |
85 | #define for_each_rsnd_ssi(pos, priv, i) \ |
86 | for (i = 0; \ | |
87 | (i < rsnd_ssi_nr(priv)) && \ | |
dd27d808 | 88 | ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ |
ae5c3223 KM |
89 | i++) |
90 | ||
02534f2f | 91 | #define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id) |
232c00b6 | 92 | #define rsnd_ssi_to_dma(mod) ((ssi)->dma) |
dd27d808 | 93 | #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) |
ae5c3223 | 94 | #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
02534f2f | 95 | #define rsnd_ssi_mode_flags(p) ((p)->flags) |
e7d850dd | 96 | #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io)) |
c308abe4 KM |
97 | #define rsnd_ssi_is_multi_slave(mod, io) \ |
98 | (rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod))) | |
ae5c3223 | 99 | |
b415b4d3 | 100 | int rsnd_ssi_use_busif(struct rsnd_dai_stream *io) |
d9288d0b | 101 | { |
b415b4d3 | 102 | struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io); |
d9288d0b | 103 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
d9288d0b KM |
104 | int use_busif = 0; |
105 | ||
7b466fc6 KM |
106 | if (!rsnd_ssi_is_dma_mode(mod)) |
107 | return 0; | |
108 | ||
d9288d0b KM |
109 | if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF)) |
110 | use_busif = 1; | |
111 | if (rsnd_io_to_mod_src(io)) | |
112 | use_busif = 1; | |
113 | ||
114 | return use_busif; | |
115 | } | |
116 | ||
e10369d8 KM |
117 | static void rsnd_ssi_status_clear(struct rsnd_mod *mod) |
118 | { | |
119 | rsnd_mod_write(mod, SSISR, 0); | |
120 | } | |
121 | ||
122 | static u32 rsnd_ssi_status_get(struct rsnd_mod *mod) | |
123 | { | |
124 | return rsnd_mod_read(mod, SSISR); | |
125 | } | |
126 | ||
ae5c3223 KM |
127 | static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
128 | u32 bit) | |
129 | { | |
130 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
131 | struct device *dev = rsnd_priv_to_dev(priv); | |
132 | u32 status; | |
133 | int i; | |
134 | ||
135 | for (i = 0; i < 1024; i++) { | |
e10369d8 | 136 | status = rsnd_ssi_status_get(mod); |
ae5c3223 KM |
137 | if (status & bit) |
138 | return; | |
139 | ||
140 | udelay(50); | |
141 | } | |
142 | ||
1120dbff KM |
143 | dev_warn(dev, "%s[%d] status check failed\n", |
144 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
ae5c3223 KM |
145 | } |
146 | ||
b4c83b17 KM |
147 | u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io) |
148 | { | |
149 | struct rsnd_mod *mod; | |
b4c83b17 KM |
150 | enum rsnd_mod_type types[] = { |
151 | RSND_MOD_SSIM1, | |
152 | RSND_MOD_SSIM2, | |
153 | RSND_MOD_SSIM3, | |
154 | }; | |
155 | int i, mask; | |
156 | ||
b4c83b17 KM |
157 | mask = 0; |
158 | for (i = 0; i < ARRAY_SIZE(types); i++) { | |
159 | mod = rsnd_io_to_mod(io, types[i]); | |
160 | if (!mod) | |
161 | continue; | |
162 | ||
163 | mask |= 1 << rsnd_mod_id(mod); | |
164 | } | |
165 | ||
166 | return mask; | |
167 | } | |
168 | ||
26d34b11 | 169 | static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod, |
adcf7d5e | 170 | struct rsnd_dai_stream *io) |
ae5c3223 | 171 | { |
1b13d118 | 172 | struct rsnd_priv *priv = rsnd_io_to_priv(io); |
adcf7d5e | 173 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
ae5c3223 | 174 | struct device *dev = rsnd_priv_to_dev(priv); |
e7d850dd | 175 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
26d34b11 | 176 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
e7d850dd | 177 | struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
c140284b | 178 | int slots = rsnd_get_slot_width(io); |
eae6fff4 | 179 | int j, ret; |
ae5c3223 KM |
180 | int ssi_clk_mul_table[] = { |
181 | 1, 2, 4, 8, 16, 6, 12, | |
182 | }; | |
183 | unsigned int main_rate; | |
ba9c949f | 184 | unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime); |
ae5c3223 | 185 | |
e7d850dd KM |
186 | if (!rsnd_rdai_is_clk_master(rdai)) |
187 | return 0; | |
188 | ||
189 | if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) | |
190 | return 0; | |
191 | ||
b4c83b17 KM |
192 | if (rsnd_ssi_is_multi_slave(mod, io)) |
193 | return 0; | |
194 | ||
e7d850dd KM |
195 | if (ssi->usrcnt > 1) { |
196 | if (ssi->rate != rate) { | |
197 | dev_err(dev, "SSI parent/child should use same rate\n"); | |
198 | return -EINVAL; | |
199 | } | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
ae5c3223 KM |
204 | /* |
205 | * Find best clock, and try to start ADG | |
206 | */ | |
eae6fff4 KM |
207 | for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { |
208 | ||
209 | /* | |
210 | * this driver is assuming that | |
8ec85e7f | 211 | * system word is 32bit x slots |
eae6fff4 KM |
212 | * see rsnd_ssi_init() |
213 | */ | |
8ec85e7f | 214 | main_rate = rate * 32 * slots * ssi_clk_mul_table[j]; |
eae6fff4 KM |
215 | |
216 | ret = rsnd_adg_ssi_clk_try_start(mod, main_rate); | |
217 | if (0 == ret) { | |
218 | ssi->cr_clk = FORCE | SWL_32 | | |
219 | SCKD | SWSD | CKDV(j); | |
08bada26 | 220 | ssi->wsr = CONT; |
eae6fff4 | 221 | |
e7d850dd KM |
222 | ssi->rate = rate; |
223 | ||
eae6fff4 KM |
224 | dev_dbg(dev, "%s[%d] outputs %u Hz\n", |
225 | rsnd_mod_name(mod), | |
226 | rsnd_mod_id(mod), rate); | |
227 | ||
228 | return 0; | |
ae5c3223 KM |
229 | } |
230 | } | |
231 | ||
232 | dev_err(dev, "unsupported clock rate\n"); | |
233 | return -EIO; | |
234 | } | |
235 | ||
26d34b11 | 236 | static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod, |
e7d850dd | 237 | struct rsnd_dai_stream *io) |
ae5c3223 | 238 | { |
f708d944 | 239 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
26d34b11 | 240 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
e7d850dd | 241 | struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
3ba84f45 | 242 | |
e7d850dd | 243 | if (!rsnd_rdai_is_clk_master(rdai)) |
ae5c3223 | 244 | return; |
ae5c3223 | 245 | |
e7d850dd KM |
246 | if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) |
247 | return; | |
ae5c3223 | 248 | |
e7d850dd KM |
249 | if (ssi->usrcnt > 1) |
250 | return; | |
919567d9 | 251 | |
e7d850dd KM |
252 | ssi->cr_clk = 0; |
253 | ssi->rate = 0; | |
ae5c3223 | 254 | |
e7d850dd | 255 | rsnd_adg_ssi_clk_stop(mod); |
ae5c3223 KM |
256 | } |
257 | ||
0dc6bf75 | 258 | static void rsnd_ssi_config_init(struct rsnd_mod *mod, |
840ada3b KM |
259 | struct rsnd_dai_stream *io) |
260 | { | |
261 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
262 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); | |
26d34b11 | 263 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
840ada3b KM |
264 | u32 cr_own; |
265 | u32 cr_mode; | |
186fadc1 | 266 | u32 wsr; |
f98ed119 KM |
267 | int is_tdm; |
268 | ||
c140284b | 269 | is_tdm = (rsnd_get_slot_width(io) >= 6) ? 1 : 0; |
840ada3b KM |
270 | |
271 | /* | |
272 | * always use 32bit system word. | |
273 | * see also rsnd_ssi_master_clk_enable() | |
274 | */ | |
275 | cr_own = FORCE | SWL_32 | PDTA; | |
276 | ||
277 | if (rdai->bit_clk_inv) | |
278 | cr_own |= SCKP; | |
f98ed119 | 279 | if (rdai->frm_clk_inv ^ is_tdm) |
840ada3b KM |
280 | cr_own |= SWSP; |
281 | if (rdai->data_alignment) | |
282 | cr_own |= SDTA; | |
283 | if (rdai->sys_delay) | |
284 | cr_own |= DEL; | |
285 | if (rsnd_io_is_play(io)) | |
286 | cr_own |= TRMD; | |
287 | ||
288 | switch (runtime->sample_bits) { | |
289 | case 16: | |
290 | cr_own |= DWL_16; | |
291 | break; | |
292 | case 32: | |
293 | cr_own |= DWL_24; | |
294 | break; | |
840ada3b KM |
295 | } |
296 | ||
26d34b11 | 297 | if (rsnd_ssi_is_dma_mode(mod)) { |
840ada3b KM |
298 | cr_mode = UIEN | OIEN | /* over/under run */ |
299 | DMEN; /* DMA : enable DMA */ | |
300 | } else { | |
301 | cr_mode = DIEN; /* PIO : enable Data interrupt */ | |
302 | } | |
303 | ||
186fadc1 KM |
304 | /* |
305 | * TDM Extend Mode | |
306 | * see | |
307 | * rsnd_ssiu_init_gen2() | |
308 | */ | |
309 | wsr = ssi->wsr; | |
f98ed119 | 310 | if (is_tdm) { |
186fadc1 KM |
311 | wsr |= WS_MODE; |
312 | cr_own |= CHNL_8; | |
313 | } | |
314 | ||
840ada3b KM |
315 | ssi->cr_own = cr_own; |
316 | ssi->cr_mode = cr_mode; | |
186fadc1 | 317 | ssi->wsr = wsr; |
0dc6bf75 | 318 | } |
840ada3b | 319 | |
0dc6bf75 KM |
320 | static void rsnd_ssi_register_setup(struct rsnd_mod *mod) |
321 | { | |
322 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
323 | ||
324 | rsnd_mod_write(mod, SSIWSR, ssi->wsr); | |
325 | rsnd_mod_write(mod, SSICR, ssi->cr_own | | |
326 | ssi->cr_clk | | |
327 | ssi->cr_mode); /* without EN */ | |
840ada3b KM |
328 | } |
329 | ||
ae5c3223 KM |
330 | /* |
331 | * SSI mod common functions | |
332 | */ | |
333 | static int rsnd_ssi_init(struct rsnd_mod *mod, | |
2c0fac19 | 334 | struct rsnd_dai_stream *io, |
690602fc | 335 | struct rsnd_priv *priv) |
ae5c3223 KM |
336 | { |
337 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
e7d850dd KM |
338 | int ret; |
339 | ||
340 | ssi->usrcnt++; | |
341 | ||
342 | rsnd_mod_power_on(mod); | |
343 | ||
26d34b11 | 344 | ret = rsnd_ssi_master_clk_start(mod, io); |
e7d850dd KM |
345 | if (ret < 0) |
346 | return ret; | |
347 | ||
0dc6bf75 KM |
348 | if (!rsnd_ssi_is_parent(mod, io)) |
349 | rsnd_ssi_config_init(mod, io); | |
ae5c3223 | 350 | |
0dc6bf75 | 351 | rsnd_ssi_register_setup(mod); |
e7d850dd | 352 | |
e7d850dd KM |
353 | /* clear error status */ |
354 | rsnd_ssi_status_clear(mod); | |
355 | ||
ae5c3223 KM |
356 | return 0; |
357 | } | |
358 | ||
359 | static int rsnd_ssi_quit(struct rsnd_mod *mod, | |
2c0fac19 | 360 | struct rsnd_dai_stream *io, |
690602fc | 361 | struct rsnd_priv *priv) |
ae5c3223 KM |
362 | { |
363 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ae5c3223 KM |
364 | struct device *dev = rsnd_priv_to_dev(priv); |
365 | ||
e5d9cfc6 AH |
366 | if (!ssi->usrcnt) { |
367 | dev_err(dev, "%s[%d] usrcnt error\n", | |
368 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
369 | return -EIO; | |
370 | } | |
e7d850dd | 371 | |
b5b442ab | 372 | if (!rsnd_ssi_is_parent(mod, io)) |
e5d9cfc6 | 373 | ssi->cr_own = 0; |
ae5c3223 | 374 | |
26d34b11 | 375 | rsnd_ssi_master_clk_stop(mod, io); |
e7d850dd KM |
376 | |
377 | rsnd_mod_power_off(mod); | |
378 | ||
379 | ssi->usrcnt--; | |
380 | ||
ae5c3223 KM |
381 | return 0; |
382 | } | |
383 | ||
919567d9 | 384 | static int rsnd_ssi_hw_params(struct rsnd_mod *mod, |
2c0fac19 | 385 | struct rsnd_dai_stream *io, |
919567d9 KM |
386 | struct snd_pcm_substream *substream, |
387 | struct snd_pcm_hw_params *params) | |
388 | { | |
389 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
919567d9 KM |
390 | int chan = params_channels(params); |
391 | ||
392 | /* | |
393 | * Already working. | |
394 | * It will happen if SSI has parent/child connection. | |
395 | */ | |
e7d850dd | 396 | if (ssi->usrcnt > 1) { |
919567d9 KM |
397 | /* |
398 | * it is error if child <-> parent SSI uses | |
399 | * different channels. | |
400 | */ | |
401 | if (ssi->chan != chan) | |
402 | return -EIO; | |
403 | } | |
404 | ||
919567d9 | 405 | ssi->chan = chan; |
919567d9 KM |
406 | |
407 | return 0; | |
408 | } | |
409 | ||
6a25c8da KM |
410 | static int rsnd_ssi_start(struct rsnd_mod *mod, |
411 | struct rsnd_dai_stream *io, | |
412 | struct rsnd_priv *priv) | |
e7d850dd | 413 | { |
b4c83b17 KM |
414 | /* |
415 | * EN will be set via SSIU :: SSI_CONTROL | |
416 | * if Multi channel mode | |
417 | */ | |
0dc6bf75 KM |
418 | if (rsnd_ssi_multi_slaves(io)) |
419 | return 0; | |
e7d850dd | 420 | |
0dc6bf75 | 421 | rsnd_mod_bset(mod, SSICR, EN, EN); |
e7d850dd KM |
422 | |
423 | return 0; | |
424 | } | |
425 | ||
6a25c8da KM |
426 | static int rsnd_ssi_stop(struct rsnd_mod *mod, |
427 | struct rsnd_dai_stream *io, | |
428 | struct rsnd_priv *priv) | |
e7d850dd | 429 | { |
6a25c8da KM |
430 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
431 | u32 cr; | |
432 | ||
e7d850dd | 433 | /* |
6a25c8da | 434 | * don't stop if not last user |
e7d850dd | 435 | * see also |
6a25c8da | 436 | * rsnd_ssi_start |
e7d850dd KM |
437 | * rsnd_ssi_interrupt |
438 | */ | |
6a25c8da KM |
439 | if (ssi->usrcnt > 1) |
440 | return 0; | |
e7d850dd KM |
441 | |
442 | /* | |
443 | * disable all IRQ, | |
444 | * and, wait all data was sent | |
445 | */ | |
446 | cr = ssi->cr_own | | |
447 | ssi->cr_clk; | |
4e7d606c | 448 | |
e7d850dd KM |
449 | rsnd_mod_write(mod, SSICR, cr | EN); |
450 | rsnd_ssi_status_check(mod, DIRQ); | |
4e7d606c | 451 | |
e7d850dd KM |
452 | /* |
453 | * disable SSI, | |
454 | * and, wait idle state | |
455 | */ | |
456 | rsnd_mod_write(mod, SSICR, cr); /* disabled all */ | |
457 | rsnd_ssi_status_check(mod, IIRQ); | |
4e7d606c KM |
458 | |
459 | return 0; | |
460 | } | |
461 | ||
615fb6c7 KM |
462 | static int rsnd_ssi_irq(struct rsnd_mod *mod, |
463 | struct rsnd_dai_stream *io, | |
464 | struct rsnd_priv *priv, | |
465 | int enable) | |
466 | { | |
467 | u32 val = 0; | |
468 | ||
469 | if (rsnd_is_gen1(priv)) | |
470 | return 0; | |
471 | ||
472 | if (rsnd_ssi_is_parent(mod, io)) | |
473 | return 0; | |
474 | ||
475 | if (enable) | |
476 | val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000; | |
477 | ||
478 | rsnd_mod_write(mod, SSI_INT_ENABLE, val); | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
bfc0cfe6 KM |
483 | static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, |
484 | struct rsnd_dai_stream *io) | |
ae5c3223 | 485 | { |
690602fc | 486 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
765ae7c8 | 487 | int is_dma = rsnd_ssi_is_dma_mode(mod); |
02299d98 | 488 | u32 status; |
75defee0 | 489 | bool elapsed = false; |
6a25c8da | 490 | bool stop = false; |
02299d98 KM |
491 | |
492 | spin_lock(&priv->lock); | |
ae5c3223 | 493 | |
02299d98 | 494 | /* ignore all cases if not working */ |
d5bbe7de | 495 | if (!rsnd_io_is_working(io)) |
02299d98 KM |
496 | goto rsnd_ssi_interrupt_out; |
497 | ||
6a25c8da | 498 | status = rsnd_ssi_status_get(mod); |
4e7d606c KM |
499 | |
500 | /* PIO only */ | |
765ae7c8 | 501 | if (!is_dma && (status & DIRQ)) { |
ae5c3223 KM |
502 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
503 | u32 *buf = (u32 *)(runtime->dma_area + | |
504 | rsnd_dai_pointer_offset(io, 0)); | |
505 | ||
ae5c3223 KM |
506 | /* |
507 | * 8/16/32 data can be assesse to TDR/RDR register | |
508 | * directly as 32bit data | |
509 | * see rsnd_ssi_init() | |
510 | */ | |
985a4f6e | 511 | if (rsnd_io_is_play(io)) |
4686a0ad | 512 | rsnd_mod_write(mod, SSITDR, *buf); |
ae5c3223 | 513 | else |
4686a0ad | 514 | *buf = rsnd_mod_read(mod, SSIRDR); |
ae5c3223 | 515 | |
75defee0 | 516 | elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); |
4e7d606c | 517 | } |
ae5c3223 | 518 | |
12927a8f | 519 | /* DMA only */ |
6a25c8da KM |
520 | if (is_dma && (status & (UIRQ | OIRQ))) |
521 | stop = true; | |
69e32a58 | 522 | |
5342dff2 | 523 | rsnd_ssi_status_clear(mod); |
02299d98 KM |
524 | rsnd_ssi_interrupt_out: |
525 | spin_unlock(&priv->lock); | |
526 | ||
75defee0 KM |
527 | if (elapsed) |
528 | rsnd_dai_period_elapsed(io); | |
6a25c8da KM |
529 | |
530 | if (stop) | |
531 | snd_pcm_stop_xrun(io->substream); | |
532 | ||
bfc0cfe6 KM |
533 | } |
534 | ||
535 | static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) | |
536 | { | |
537 | struct rsnd_mod *mod = data; | |
538 | ||
539 | rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt); | |
75defee0 | 540 | |
4e7d606c | 541 | return IRQ_HANDLED; |
ae5c3223 KM |
542 | } |
543 | ||
6cfad789 KM |
544 | /* |
545 | * SSI PIO | |
546 | */ | |
e7d850dd | 547 | static void rsnd_ssi_parent_attach(struct rsnd_mod *mod, |
098bd891 | 548 | struct rsnd_dai_stream *io) |
e7d850dd | 549 | { |
098bd891 KM |
550 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
551 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); | |
552 | ||
e7d850dd KM |
553 | if (!__rsnd_ssi_is_pin_sharing(mod)) |
554 | return; | |
555 | ||
098bd891 KM |
556 | if (!rsnd_rdai_is_clk_master(rdai)) |
557 | return; | |
558 | ||
e7d850dd KM |
559 | switch (rsnd_mod_id(mod)) { |
560 | case 1: | |
561 | case 2: | |
562 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP); | |
563 | break; | |
564 | case 4: | |
565 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP); | |
566 | break; | |
567 | case 8: | |
568 | rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP); | |
569 | break; | |
570 | } | |
571 | } | |
572 | ||
098bd891 KM |
573 | static int rsnd_ssi_pcm_new(struct rsnd_mod *mod, |
574 | struct rsnd_dai_stream *io, | |
575 | struct snd_soc_pcm_runtime *rtd) | |
576 | { | |
577 | /* | |
578 | * rsnd_rdai_is_clk_master() will be enabled after set_fmt, | |
579 | * and, pcm_new will be called after it. | |
580 | * This function reuse pcm_new at this point. | |
581 | */ | |
582 | rsnd_ssi_parent_attach(mod, io); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
c7f69ab5 KM |
587 | static int rsnd_ssi_common_probe(struct rsnd_mod *mod, |
588 | struct rsnd_dai_stream *io, | |
589 | struct rsnd_priv *priv) | |
ff8f30e6 | 590 | { |
ff8f30e6 KM |
591 | struct device *dev = rsnd_priv_to_dev(priv); |
592 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
ff8f30e6 KM |
593 | int ret; |
594 | ||
b4c83b17 KM |
595 | /* |
596 | * SSIP/SSIU/IRQ are not needed on | |
597 | * SSI Multi slaves | |
598 | */ | |
599 | if (rsnd_ssi_is_multi_slave(mod, io)) | |
600 | return 0; | |
601 | ||
098bd891 KM |
602 | /* |
603 | * It can't judge ssi parent at this point | |
604 | * see rsnd_ssi_pcm_new() | |
605 | */ | |
e7d850dd | 606 | |
c7f69ab5 KM |
607 | ret = rsnd_ssiu_attach(io, mod); |
608 | if (ret < 0) | |
609 | return ret; | |
610 | ||
02534f2f | 611 | ret = devm_request_irq(dev, ssi->irq, |
6cfad789 | 612 | rsnd_ssi_interrupt, |
ff8f30e6 | 613 | IRQF_SHARED, |
bfc0cfe6 | 614 | dev_name(dev), mod); |
8aefda50 | 615 | |
ff8f30e6 KM |
616 | return ret; |
617 | } | |
618 | ||
ae5c3223 | 619 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
8aefda50 | 620 | .name = SSI_NAME, |
c7f69ab5 | 621 | .probe = rsnd_ssi_common_probe, |
ae5c3223 KM |
622 | .init = rsnd_ssi_init, |
623 | .quit = rsnd_ssi_quit, | |
49229850 KM |
624 | .start = rsnd_ssi_start, |
625 | .stop = rsnd_ssi_stop, | |
b5b442ab | 626 | .irq = rsnd_ssi_irq, |
098bd891 | 627 | .pcm_new = rsnd_ssi_pcm_new, |
919567d9 | 628 | .hw_params = rsnd_ssi_hw_params, |
ae5c3223 KM |
629 | }; |
630 | ||
ff8f30e6 | 631 | static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
2c0fac19 | 632 | struct rsnd_dai_stream *io, |
690602fc | 633 | struct rsnd_priv *priv) |
ff8f30e6 | 634 | { |
ff8f30e6 | 635 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
02534f2f | 636 | int dma_id = 0; /* not needed */ |
ff8f30e6 KM |
637 | int ret; |
638 | ||
b4c83b17 KM |
639 | /* |
640 | * SSIP/SSIU/IRQ/DMA are not needed on | |
641 | * SSI Multi slaves | |
642 | */ | |
643 | if (rsnd_ssi_is_multi_slave(mod, io)) | |
644 | return 0; | |
645 | ||
c7f69ab5 | 646 | ret = rsnd_ssi_common_probe(mod, io, priv); |
4e7d606c | 647 | if (ret) |
b543b52a | 648 | return ret; |
4e7d606c | 649 | |
355cb84f KM |
650 | /* SSI probe might be called many times in MUX multi path */ |
651 | ret = rsnd_dma_attach(io, mod, &ssi->dma, dma_id); | |
8aefda50 | 652 | |
ff8f30e6 KM |
653 | return ret; |
654 | } | |
655 | ||
656 | static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, | |
2c0fac19 | 657 | struct rsnd_dai_stream *io, |
690602fc | 658 | struct rsnd_priv *priv) |
97463e19 | 659 | { |
4e7d606c KM |
660 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
661 | struct device *dev = rsnd_priv_to_dev(priv); | |
02534f2f | 662 | int irq = ssi->irq; |
4e7d606c | 663 | |
4e7d606c | 664 | /* PIO will request IRQ again */ |
b05ce4c0 | 665 | devm_free_irq(dev, irq, mod); |
4e7d606c | 666 | |
97463e19 KM |
667 | return 0; |
668 | } | |
669 | ||
670 | static int rsnd_ssi_fallback(struct rsnd_mod *mod, | |
2c0fac19 | 671 | struct rsnd_dai_stream *io, |
690602fc | 672 | struct rsnd_priv *priv) |
ff8f30e6 | 673 | { |
d3a76823 KM |
674 | struct device *dev = rsnd_priv_to_dev(priv); |
675 | ||
d3a76823 KM |
676 | /* |
677 | * fallback to PIO | |
678 | * | |
679 | * SSI .probe might be called again. | |
680 | * see | |
681 | * rsnd_rdai_continuance_probe() | |
682 | */ | |
683 | mod->ops = &rsnd_ssi_pio_ops; | |
684 | ||
685 | dev_info(dev, "%s[%d] fallback to PIO mode\n", | |
686 | rsnd_mod_name(mod), rsnd_mod_id(mod)); | |
687 | ||
ff8f30e6 KM |
688 | return 0; |
689 | } | |
690 | ||
9b99e9a7 KM |
691 | static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io, |
692 | struct rsnd_mod *mod) | |
d9288d0b | 693 | { |
72adc61f | 694 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
72adc61f KM |
695 | int is_play = rsnd_io_is_play(io); |
696 | char *name; | |
697 | ||
b415b4d3 | 698 | if (rsnd_ssi_use_busif(io)) |
72adc61f KM |
699 | name = is_play ? "rxu" : "txu"; |
700 | else | |
701 | name = is_play ? "rx" : "tx"; | |
702 | ||
703 | return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), | |
704 | mod, name); | |
d9288d0b KM |
705 | } |
706 | ||
849fc82a | 707 | static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
8aefda50 | 708 | .name = SSI_NAME, |
72adc61f | 709 | .dma_req = rsnd_ssi_dma_req, |
ff8f30e6 KM |
710 | .probe = rsnd_ssi_dma_probe, |
711 | .remove = rsnd_ssi_dma_remove, | |
849fc82a KM |
712 | .init = rsnd_ssi_init, |
713 | .quit = rsnd_ssi_quit, | |
497debaa KM |
714 | .start = rsnd_ssi_start, |
715 | .stop = rsnd_ssi_stop, | |
c8e969a8 | 716 | .irq = rsnd_ssi_irq, |
098bd891 | 717 | .pcm_new = rsnd_ssi_pcm_new, |
97463e19 | 718 | .fallback = rsnd_ssi_fallback, |
919567d9 | 719 | .hw_params = rsnd_ssi_hw_params, |
849fc82a KM |
720 | }; |
721 | ||
05795411 KM |
722 | int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
723 | { | |
724 | return mod->ops == &rsnd_ssi_dma_ops; | |
725 | } | |
726 | ||
727 | ||
ae5c3223 KM |
728 | /* |
729 | * Non SSI | |
730 | */ | |
ae5c3223 | 731 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
8aefda50 | 732 | .name = SSI_NAME, |
ae5c3223 KM |
733 | }; |
734 | ||
735 | /* | |
736 | * ssi mod function | |
737 | */ | |
b4c83b17 KM |
738 | static void rsnd_ssi_connect(struct rsnd_mod *mod, |
739 | struct rsnd_dai_stream *io) | |
740 | { | |
741 | struct rsnd_dai *rdai = rsnd_io_to_rdai(io); | |
742 | enum rsnd_mod_type types[] = { | |
743 | RSND_MOD_SSI, | |
744 | RSND_MOD_SSIM1, | |
745 | RSND_MOD_SSIM2, | |
746 | RSND_MOD_SSIM3, | |
747 | }; | |
748 | enum rsnd_mod_type type; | |
749 | int i; | |
750 | ||
751 | /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */ | |
752 | for (i = 0; i < ARRAY_SIZE(types); i++) { | |
753 | type = types[i]; | |
754 | if (!rsnd_io_to_mod(io, type)) { | |
755 | rsnd_dai_connect(mod, io, type); | |
756 | rsnd_set_slot(rdai, 2 * (i + 1), (i + 1)); | |
757 | return; | |
758 | } | |
759 | } | |
760 | } | |
761 | ||
762 | void rsnd_parse_connect_ssi(struct rsnd_dai *rdai, | |
763 | struct device_node *playback, | |
764 | struct device_node *capture) | |
765 | { | |
766 | struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); | |
767 | struct device_node *node; | |
768 | struct device_node *np; | |
769 | struct rsnd_mod *mod; | |
770 | int i; | |
771 | ||
772 | node = rsnd_ssi_of_node(priv); | |
773 | if (!node) | |
774 | return; | |
775 | ||
776 | i = 0; | |
777 | for_each_child_of_node(node, np) { | |
778 | mod = rsnd_ssi_mod_get(priv, i); | |
779 | if (np == playback) | |
780 | rsnd_ssi_connect(mod, &rdai->playback); | |
781 | if (np == capture) | |
782 | rsnd_ssi_connect(mod, &rdai->capture); | |
783 | i++; | |
784 | } | |
785 | ||
786 | of_node_put(node); | |
787 | } | |
788 | ||
ae5c3223 KM |
789 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) |
790 | { | |
8b14719b TI |
791 | if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
792 | id = 0; | |
ae5c3223 | 793 | |
02534f2f | 794 | return rsnd_mod_get(rsnd_ssi_get(priv, id)); |
ae5c3223 KM |
795 | } |
796 | ||
b415b4d3 | 797 | int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
7b5ce975 KM |
798 | { |
799 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); | |
800 | ||
801 | return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); | |
802 | } | |
803 | ||
5ba17b42 KM |
804 | static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io, |
805 | struct rsnd_mod *mod, | |
806 | enum rsnd_mod_type type) | |
807 | { | |
808 | /* | |
809 | * SSIP (= SSI parent) needs to be special, otherwise, | |
810 | * 2nd SSI might doesn't start. see also rsnd_mod_call() | |
811 | * | |
812 | * We can't include parent SSI status on SSI, because we don't know | |
813 | * how many SSI requests parent SSI. Thus, it is localed on "io" now. | |
814 | * ex) trouble case | |
815 | * Playback: SSI0 | |
816 | * Capture : SSI1 (needs SSI0) | |
817 | * | |
818 | * 1) start Capture -> SSI0/SSI1 are started. | |
819 | * 2) start Playback -> SSI0 doesn't work, because it is already | |
820 | * marked as "started" on 1) | |
821 | * | |
822 | * OTOH, using each mod's status is good for MUX case. | |
823 | * It doesn't need to start in 2nd start | |
824 | * ex) | |
825 | * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0 | |
826 | * | | |
827 | * IO-1: SRC1 -> CTU2 -+ | |
828 | * | |
829 | * 1) start IO-0 -> start SSI0 | |
830 | * 2) start IO-1 -> SSI0 doesn't need to start, because it is | |
831 | * already started on 1) | |
832 | */ | |
833 | if (type == RSND_MOD_SSIP) | |
834 | return &io->parent_ssi_status; | |
835 | ||
836 | return rsnd_mod_get_status(io, mod, type); | |
837 | } | |
838 | ||
2ea6b074 | 839 | int rsnd_ssi_probe(struct rsnd_priv *priv) |
ae5c3223 | 840 | { |
02534f2f KM |
841 | struct device_node *node; |
842 | struct device_node *np; | |
ae5c3223 KM |
843 | struct device *dev = rsnd_priv_to_dev(priv); |
844 | struct rsnd_mod_ops *ops; | |
845 | struct clk *clk; | |
ae5c3223 KM |
846 | struct rsnd_ssi *ssi; |
847 | char name[RSND_SSI_NAME_SIZE]; | |
2f78dd7f | 848 | int i, nr, ret; |
ae5c3223 | 849 | |
02534f2f KM |
850 | node = rsnd_ssi_of_node(priv); |
851 | if (!node) | |
852 | return -EINVAL; | |
853 | ||
854 | nr = of_get_child_count(node); | |
855 | if (!nr) { | |
856 | ret = -EINVAL; | |
857 | goto rsnd_ssi_probe_done; | |
858 | } | |
90e8e50f | 859 | |
dd27d808 | 860 | ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
02534f2f KM |
861 | if (!ssi) { |
862 | ret = -ENOMEM; | |
863 | goto rsnd_ssi_probe_done; | |
864 | } | |
ae5c3223 | 865 | |
dd27d808 KM |
866 | priv->ssi = ssi; |
867 | priv->ssi_nr = nr; | |
ae5c3223 | 868 | |
02534f2f KM |
869 | i = 0; |
870 | for_each_child_of_node(node, np) { | |
871 | ssi = rsnd_ssi_get(priv, i); | |
ae5c3223 | 872 | |
8aefda50 KM |
873 | snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
874 | SSI_NAME, i); | |
ae5c3223 | 875 | |
60dbb4f1 | 876 | clk = devm_clk_get(dev, name); |
02534f2f KM |
877 | if (IS_ERR(clk)) { |
878 | ret = PTR_ERR(clk); | |
879 | goto rsnd_ssi_probe_done; | |
880 | } | |
ae5c3223 | 881 | |
02534f2f KM |
882 | if (of_get_property(np, "shared-pin", NULL)) |
883 | ssi->flags |= RSND_SSI_CLK_PIN_SHARE; | |
884 | ||
885 | if (of_get_property(np, "no-busif", NULL)) | |
886 | ssi->flags |= RSND_SSI_NO_BUSIF; | |
887 | ||
888 | ssi->irq = irq_of_parse_and_map(np, 0); | |
889 | if (!ssi->irq) { | |
890 | ret = -EINVAL; | |
891 | goto rsnd_ssi_probe_done; | |
892 | } | |
ae5c3223 KM |
893 | |
894 | ops = &rsnd_ssi_non_ops; | |
02534f2f | 895 | if (of_get_property(np, "pio-transfer", NULL)) |
ff8f30e6 | 896 | ops = &rsnd_ssi_pio_ops; |
02534f2f KM |
897 | else |
898 | ops = &rsnd_ssi_dma_ops; | |
ae5c3223 | 899 | |
b76e218a | 900 | ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk, |
5ba17b42 | 901 | rsnd_ssi_get_status, RSND_MOD_SSI, i); |
2f78dd7f | 902 | if (ret) |
02534f2f KM |
903 | goto rsnd_ssi_probe_done; |
904 | ||
905 | i++; | |
ae5c3223 KM |
906 | } |
907 | ||
02534f2f KM |
908 | ret = 0; |
909 | ||
910 | rsnd_ssi_probe_done: | |
911 | of_node_put(node); | |
912 | ||
913 | return ret; | |
ae5c3223 | 914 | } |
2f78dd7f | 915 | |
2ea6b074 | 916 | void rsnd_ssi_remove(struct rsnd_priv *priv) |
2f78dd7f KM |
917 | { |
918 | struct rsnd_ssi *ssi; | |
919 | int i; | |
920 | ||
921 | for_each_rsnd_ssi(ssi, priv, i) { | |
b76e218a | 922 | rsnd_mod_quit(rsnd_mod_get(ssi)); |
2f78dd7f KM |
923 | } |
924 | } |