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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / sound / soc / sh / rcar / dma.c
blob7658e8fd7bdce5032df9210b5662048a88ebf329
1 /*
2 * Renesas R-Car Audio DMAC support
3 *
4 * Copyright (C) 2015 Renesas Electronics Corp.
5 * Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #include <linux/delay.h>
12 #include <linux/of_dma.h>
13 #include "rsnd.h"
14
15 /*
16 * Audio DMAC peri peri register
17 */
18 #define PDMASAR 0x00
19 #define PDMADAR 0x04
20 #define PDMACHCR 0x0c
21
22 /* PDMACHCR */
23 #define PDMACHCR_DE (1 << 0)
24
25
26 struct rsnd_dmaen {
27 struct dma_chan *chan;
28 };
29
30 struct rsnd_dmapp {
31 int dmapp_id;
32 u32 chcr;
33 };
34
35 struct rsnd_dma {
36 struct rsnd_mod mod;
37 dma_addr_t src_addr;
38 dma_addr_t dst_addr;
39 union {
40 struct rsnd_dmaen en;
41 struct rsnd_dmapp pp;
42 } dma;
43 };
44
45 struct rsnd_dma_ctrl {
46 void __iomem *base;
47 int dmaen_num;
48 int dmapp_num;
49 };
50
51 #define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma)
52 #define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod)
53 #define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
54 #define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
55
56 /*
57 * Audio DMAC
58 */
59 static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
60 struct rsnd_dai_stream *io)
61 {
62 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
63 bool elapsed = false;
64 unsigned long flags;
65
66 /*
67 * Renesas sound Gen1 needs 1 DMAC,
68 * Gen2 needs 2 DMAC.
69 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
70 * But, Audio-DMAC-peri-peri doesn't have interrupt,
71 * and this driver is assuming that here.
72 *
73 * If Audio-DMAC-peri-peri has interrpt,
74 * rsnd_dai_pointer_update() will be called twice,
75 * ant it will breaks io->byte_pos
76 */
77 spin_lock_irqsave(&priv->lock, flags);
78
79 if (rsnd_io_is_working(io))
80 elapsed = rsnd_dai_pointer_update(io, io->byte_per_period);
81
82 spin_unlock_irqrestore(&priv->lock, flags);
83
84 if (elapsed)
85 rsnd_dai_period_elapsed(io);
86 }
87
88 static void rsnd_dmaen_complete(void *data)
89 {
90 struct rsnd_mod *mod = data;
91
92 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
93 }
94
95 static int rsnd_dmaen_stop(struct rsnd_mod *mod,
96 struct rsnd_dai_stream *io,
97 struct rsnd_priv *priv)
98 {
99 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
100 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
101
102 dmaengine_terminate_all(dmaen->chan);
103
104 return 0;
105 }
106
107 static int rsnd_dmaen_start(struct rsnd_mod *mod,
108 struct rsnd_dai_stream *io,
109 struct rsnd_priv *priv)
110 {
111 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
112 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
113 struct snd_pcm_substream *substream = io->substream;
114 struct device *dev = rsnd_priv_to_dev(priv);
115 struct dma_async_tx_descriptor *desc;
116 int is_play = rsnd_io_is_play(io);
117
118 desc = dmaengine_prep_dma_cyclic(dmaen->chan,
119 substream->runtime->dma_addr,
120 snd_pcm_lib_buffer_bytes(substream),
121 snd_pcm_lib_period_bytes(substream),
122 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
123 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
124
125 if (!desc) {
126 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
127 return -EIO;
128 }
129
130 desc->callback = rsnd_dmaen_complete;
131 desc->callback_param = rsnd_mod_get(dma);
132
133 if (dmaengine_submit(desc) < 0) {
134 dev_err(dev, "dmaengine_submit() fail\n");
135 return -EIO;
136 }
137
138 dma_async_issue_pending(dmaen->chan);
139
140 return 0;
141 }
142
143 struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node,
144 struct rsnd_mod *mod, char *name)
145 {
146 struct dma_chan *chan;
147 struct device_node *np;
148 int i = 0;
149
150 for_each_child_of_node(of_node, np) {
151 if (i == rsnd_mod_id(mod))
152 break;
153 i++;
154 }
155
156 chan = of_dma_request_slave_channel(np, name);
157
158 of_node_put(np);
159 of_node_put(of_node);
160
161 return chan;
162 }
163
164 static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io,
165 struct rsnd_mod *mod_from,
166 struct rsnd_mod *mod_to)
167 {
168 if ((!mod_from && !mod_to) ||
169 (mod_from && mod_to))
170 return NULL;
171
172 if (mod_from)
173 return rsnd_mod_dma_req(io, mod_from);
174 else
175 return rsnd_mod_dma_req(io, mod_to);
176 }
177
178 static int rsnd_dmaen_remove(struct rsnd_mod *mod,
179 struct rsnd_dai_stream *io,
180 struct rsnd_priv *priv)
181 {
182 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
183 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
184
185 if (dmaen->chan)
186 dma_release_channel(dmaen->chan);
187
188 dmaen->chan = NULL;
189
190 return 0;
191 }
192
193 static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
194 struct rsnd_dma *dma, int id,
195 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
196 {
197 struct rsnd_mod *mod = rsnd_mod_get(dma);
198 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
199 struct rsnd_priv *priv = rsnd_io_to_priv(io);
200 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
201 struct device *dev = rsnd_priv_to_dev(priv);
202 struct dma_slave_config cfg = {};
203 int is_play = rsnd_io_is_play(io);
204 int ret;
205
206 if (dmaen->chan) {
207 dev_err(dev, "it already has dma channel\n");
208 return -EIO;
209 }
210
211 if (dev->of_node) {
212 dmaen->chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
213 } else {
214 dma_cap_mask_t mask;
215
216 dma_cap_zero(mask);
217 dma_cap_set(DMA_SLAVE, mask);
218
219 dmaen->chan = dma_request_channel(mask, shdma_chan_filter,
220 (void *)(uintptr_t)id);
221 }
222 if (IS_ERR_OR_NULL(dmaen->chan)) {
223 dmaen->chan = NULL;
224 dev_err(dev, "can't get dma channel\n");
225 goto rsnd_dma_channel_err;
226 }
227
228 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
229 cfg.src_addr = dma->src_addr;
230 cfg.dst_addr = dma->dst_addr;
231 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
232 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
233
234 dev_dbg(dev, "%s[%d] %pad -> %pad\n",
235 rsnd_mod_name(mod), rsnd_mod_id(mod),
236 &cfg.src_addr, &cfg.dst_addr);
237
238 ret = dmaengine_slave_config(dmaen->chan, &cfg);
239 if (ret < 0)
240 goto rsnd_dma_attach_err;
241
242 dmac->dmaen_num++;
243
244 return 0;
245
246 rsnd_dma_attach_err:
247 rsnd_dmaen_remove(mod, io, priv);
248 rsnd_dma_channel_err:
249
250 /*
251 * DMA failed. try to PIO mode
252 * see
253 * rsnd_ssi_fallback()
254 * rsnd_rdai_continuance_probe()
255 */
256 return -EAGAIN;
257 }
258
259 static struct rsnd_mod_ops rsnd_dmaen_ops = {
260 .name = "audmac",
261 .start = rsnd_dmaen_start,
262 .stop = rsnd_dmaen_stop,
263 .remove = rsnd_dmaen_remove,
264 };
265
266 /*
267 * Audio DMAC peri peri
268 */
269 static const u8 gen2_id_table_ssiu[] = {
270 0x00, /* SSI00 */
271 0x04, /* SSI10 */
272 0x08, /* SSI20 */
273 0x0c, /* SSI3 */
274 0x0d, /* SSI4 */
275 0x0e, /* SSI5 */
276 0x0f, /* SSI6 */
277 0x10, /* SSI7 */
278 0x11, /* SSI8 */
279 0x12, /* SSI90 */
280 };
281 static const u8 gen2_id_table_scu[] = {
282 0x2d, /* SCU_SRCI0 */
283 0x2e, /* SCU_SRCI1 */
284 0x2f, /* SCU_SRCI2 */
285 0x30, /* SCU_SRCI3 */
286 0x31, /* SCU_SRCI4 */
287 0x32, /* SCU_SRCI5 */
288 0x33, /* SCU_SRCI6 */
289 0x34, /* SCU_SRCI7 */
290 0x35, /* SCU_SRCI8 */
291 0x36, /* SCU_SRCI9 */
292 };
293 static const u8 gen2_id_table_cmd[] = {
294 0x37, /* SCU_CMD0 */
295 0x38, /* SCU_CMD1 */
296 };
297
298 static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
299 struct rsnd_mod *mod)
300 {
301 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
302 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
303 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
304 const u8 *entry = NULL;
305 int id = rsnd_mod_id(mod);
306 int size = 0;
307
308 if (mod == ssi) {
309 entry = gen2_id_table_ssiu;
310 size = ARRAY_SIZE(gen2_id_table_ssiu);
311 } else if (mod == src) {
312 entry = gen2_id_table_scu;
313 size = ARRAY_SIZE(gen2_id_table_scu);
314 } else if (mod == dvc) {
315 entry = gen2_id_table_cmd;
316 size = ARRAY_SIZE(gen2_id_table_cmd);
317 }
318
319 if (!entry)
320 return 0xFF;
321
322 if (size <= id)
323 return 0xFF;
324
325 return entry[id];
326 }
327
328 static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
329 struct rsnd_mod *mod_from,
330 struct rsnd_mod *mod_to)
331 {
332 return (rsnd_dmapp_get_id(io, mod_from) << 24) +
333 (rsnd_dmapp_get_id(io, mod_to) << 16);
334 }
335
336 #define rsnd_dmapp_addr(dmac, dma, reg) \
337 (dmac->base + 0x20 + reg + \
338 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
339 static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
340 {
341 struct rsnd_mod *mod = rsnd_mod_get(dma);
342 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
343 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
344 struct device *dev = rsnd_priv_to_dev(priv);
345
346 dev_dbg(dev, "w %p : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
347
348 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
349 }
350
351 static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
352 {
353 struct rsnd_mod *mod = rsnd_mod_get(dma);
354 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
355 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
356
357 return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
358 }
359
360 static int rsnd_dmapp_stop(struct rsnd_mod *mod,
361 struct rsnd_dai_stream *io,
362 struct rsnd_priv *priv)
363 {
364 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
365 int i;
366
367 rsnd_dmapp_write(dma, 0, PDMACHCR);
368
369 for (i = 0; i < 1024; i++) {
370 if (0 == rsnd_dmapp_read(dma, PDMACHCR))
371 return 0;
372 udelay(1);
373 }
374
375 return -EIO;
376 }
377
378 static int rsnd_dmapp_start(struct rsnd_mod *mod,
379 struct rsnd_dai_stream *io,
380 struct rsnd_priv *priv)
381 {
382 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
383 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
384
385 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
386 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
387 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
388
389 return 0;
390 }
391
392 static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
393 struct rsnd_dma *dma, int id,
394 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
395 {
396 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
397 struct rsnd_priv *priv = rsnd_io_to_priv(io);
398 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
399 struct device *dev = rsnd_priv_to_dev(priv);
400
401 dmapp->dmapp_id = dmac->dmapp_num;
402 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
403
404 dmac->dmapp_num++;
405
406 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
407 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
408
409 return 0;
410 }
411
412 static struct rsnd_mod_ops rsnd_dmapp_ops = {
413 .name = "audmac-pp",
414 .start = rsnd_dmapp_start,
415 .stop = rsnd_dmapp_stop,
416 .quit = rsnd_dmapp_stop,
417 };
418
419 /*
420 * Common DMAC Interface
421 */
422
423 /*
424 * DMA read/write register offset
425 *
426 * RSND_xxx_I_N for Audio DMAC input
427 * RSND_xxx_O_N for Audio DMAC output
428 * RSND_xxx_I_P for Audio DMAC peri peri input
429 * RSND_xxx_O_P for Audio DMAC peri peri output
430 *
431 * ex) R-Car H2 case
432 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out
433 * SSI : 0xec541000 / 0xec241008 / 0xec24100c
434 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
435 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
436 * CMD : 0xec500000 / / 0xec008000 0xec308000
437 */
438 #define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
439 #define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
440
441 #define RDMA_SSIU_I_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i))
442 #define RDMA_SSIU_O_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i))
443
444 #define RDMA_SSIU_I_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i))
445 #define RDMA_SSIU_O_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i))
446
447 #define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
448 #define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
449
450 #define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
451 #define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
452
453 #define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
454 #define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
455
456 static dma_addr_t
457 rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
458 struct rsnd_mod *mod,
459 int is_play, int is_from)
460 {
461 struct rsnd_priv *priv = rsnd_io_to_priv(io);
462 struct device *dev = rsnd_priv_to_dev(priv);
463 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
464 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
465 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod);
466 int use_src = !!rsnd_io_to_mod_src(io);
467 int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
468 !!rsnd_io_to_mod_mix(io) ||
469 !!rsnd_io_to_mod_ctu(io);
470 int id = rsnd_mod_id(mod);
471 struct dma_addr {
472 dma_addr_t out_addr;
473 dma_addr_t in_addr;
474 } dma_addrs[3][2][3] = {
475 /* SRC */
476 {{{ 0, 0 },
477 /* Capture */
478 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
479 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
480 /* Playback */
481 {{ 0, 0, },
482 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
483 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
484 },
485 /* SSI */
486 /* Capture */
487 {{{ RDMA_SSI_O_N(ssi, id), 0 },
488 { RDMA_SSIU_O_P(ssi, id), 0 },
489 { RDMA_SSIU_O_P(ssi, id), 0 } },
490 /* Playback */
491 {{ 0, RDMA_SSI_I_N(ssi, id) },
492 { 0, RDMA_SSIU_I_P(ssi, id) },
493 { 0, RDMA_SSIU_I_P(ssi, id) } }
494 },
495 /* SSIU */
496 /* Capture */
497 {{{ RDMA_SSIU_O_N(ssi, id), 0 },
498 { RDMA_SSIU_O_P(ssi, id), 0 },
499 { RDMA_SSIU_O_P(ssi, id), 0 } },
500 /* Playback */
501 {{ 0, RDMA_SSIU_I_N(ssi, id) },
502 { 0, RDMA_SSIU_I_P(ssi, id) },
503 { 0, RDMA_SSIU_I_P(ssi, id) } } },
504 };
505
506 /* it shouldn't happen */
507 if (use_cmd && !use_src)
508 dev_err(dev, "DVC is selected without SRC\n");
509
510 /* use SSIU or SSI ? */
511 if (is_ssi && rsnd_ssi_use_busif(io))
512 is_ssi++;
513
514 return (is_from) ?
515 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
516 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
517 }
518
519 static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
520 struct rsnd_mod *mod,
521 int is_play, int is_from)
522 {
523 struct rsnd_priv *priv = rsnd_io_to_priv(io);
524
525 /*
526 * gen1 uses default DMA addr
527 */
528 if (rsnd_is_gen1(priv))
529 return 0;
530
531 if (!mod)
532 return 0;
533
534 return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
535 }
536
537 #define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
538 static void rsnd_dma_of_path(struct rsnd_mod *this,
539 struct rsnd_dai_stream *io,
540 int is_play,
541 struct rsnd_mod **mod_from,
542 struct rsnd_mod **mod_to)
543 {
544 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
545 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
546 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
547 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
548 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
549 struct rsnd_mod *mod[MOD_MAX];
550 struct rsnd_mod *mod_start, *mod_end;
551 struct rsnd_priv *priv = rsnd_mod_to_priv(this);
552 struct device *dev = rsnd_priv_to_dev(priv);
553 int nr, i, idx;
554
555 if (!ssi)
556 return;
557
558 nr = 0;
559 for (i = 0; i < MOD_MAX; i++) {
560 mod[i] = NULL;
561 nr += !!rsnd_io_to_mod(io, i);
562 }
563
564 /*
565 * [S] -*-> [E]
566 * [S] -*-> SRC -o-> [E]
567 * [S] -*-> SRC -> DVC -o-> [E]
568 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
569 *
570 * playback [S] = mem
571 * [E] = SSI
572 *
573 * capture [S] = SSI
574 * [E] = mem
575 *
576 * -*-> Audio DMAC
577 * -o-> Audio DMAC peri peri
578 */
579 mod_start = (is_play) ? NULL : ssi;
580 mod_end = (is_play) ? ssi : NULL;
581
582 idx = 0;
583 mod[idx++] = mod_start;
584 for (i = 1; i < nr; i++) {
585 if (src) {
586 mod[idx++] = src;
587 src = NULL;
588 } else if (ctu) {
589 mod[idx++] = ctu;
590 ctu = NULL;
591 } else if (mix) {
592 mod[idx++] = mix;
593 mix = NULL;
594 } else if (dvc) {
595 mod[idx++] = dvc;
596 dvc = NULL;
597 }
598 }
599 mod[idx] = mod_end;
600
601 /*
602 * | SSI | SRC |
603 * -------------+-----+-----+
604 * is_play | o | * |
605 * !is_play | * | o |
606 */
607 if ((this == ssi) == (is_play)) {
608 *mod_from = mod[idx - 1];
609 *mod_to = mod[idx];
610 } else {
611 *mod_from = mod[0];
612 *mod_to = mod[1];
613 }
614
615 dev_dbg(dev, "module connection (this is %s[%d])\n",
616 rsnd_mod_name(this), rsnd_mod_id(this));
617 for (i = 0; i <= idx; i++) {
618 dev_dbg(dev, " %s[%d]%s\n",
619 rsnd_mod_name(mod[i]), rsnd_mod_id(mod[i]),
620 (mod[i] == *mod_from) ? " from" :
621 (mod[i] == *mod_to) ? " to" : "");
622 }
623 }
624
625 int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
626 struct rsnd_mod **dma_mod, int id)
627 {
628 struct rsnd_mod *mod_from = NULL;
629 struct rsnd_mod *mod_to = NULL;
630 struct rsnd_priv *priv = rsnd_io_to_priv(io);
631 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
632 struct device *dev = rsnd_priv_to_dev(priv);
633 struct rsnd_mod_ops *ops;
634 enum rsnd_mod_type type;
635 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, int id,
636 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
637 int is_play = rsnd_io_is_play(io);
638 int ret, dma_id;
639
640 /*
641 * DMA failed. try to PIO mode
642 * see
643 * rsnd_ssi_fallback()
644 * rsnd_rdai_continuance_probe()
645 */
646 if (!dmac)
647 return -EAGAIN;
648
649 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
650
651 /* for Gen2 */
652 if (mod_from && mod_to) {
653 ops = &rsnd_dmapp_ops;
654 attach = rsnd_dmapp_attach;
655 dma_id = dmac->dmapp_num;
656 type = RSND_MOD_AUDMAPP;
657 } else {
658 ops = &rsnd_dmaen_ops;
659 attach = rsnd_dmaen_attach;
660 dma_id = dmac->dmaen_num;
661 type = RSND_MOD_AUDMA;
662 }
663
664 /* for Gen1, overwrite */
665 if (rsnd_is_gen1(priv)) {
666 ops = &rsnd_dmaen_ops;
667 attach = rsnd_dmaen_attach;
668 dma_id = dmac->dmaen_num;
669 type = RSND_MOD_AUDMA;
670 }
671
672 if (!(*dma_mod)) {
673 struct rsnd_dma *dma;
674
675 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
676 if (!dma)
677 return -ENOMEM;
678
679 *dma_mod = rsnd_mod_get(dma);
680
681 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
682 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
683
684 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
685 rsnd_mod_get_status, type, dma_id);
686 if (ret < 0)
687 return ret;
688
689 dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n",
690 rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod),
691 rsnd_mod_name(mod_from), rsnd_mod_id(mod_from),
692 rsnd_mod_name(mod_to), rsnd_mod_id(mod_to));
693
694 ret = attach(io, dma, id, mod_from, mod_to);
695 if (ret < 0)
696 return ret;
697 }
698
699 ret = rsnd_dai_connect(*dma_mod, io, type);
700 if (ret < 0)
701 return ret;
702
703 return 0;
704 }
705
706 int rsnd_dma_probe(struct rsnd_priv *priv)
707 {
708 struct platform_device *pdev = rsnd_priv_to_pdev(priv);
709 struct device *dev = rsnd_priv_to_dev(priv);
710 struct rsnd_dma_ctrl *dmac;
711 struct resource *res;
712
713 /*
714 * for Gen1
715 */
716 if (rsnd_is_gen1(priv))
717 return 0;
718
719 /*
720 * for Gen2
721 */
722 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
723 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
724 if (!dmac || !res) {
725 dev_err(dev, "dma allocate failed\n");
726 return 0; /* it will be PIO mode */
727 }
728
729 dmac->dmapp_num = 0;
730 dmac->base = devm_ioremap_resource(dev, res);
731 if (IS_ERR(dmac->base))
732 return PTR_ERR(dmac->base);
733
734 priv->dma = dmac;
735
736 return 0;
737 }
Linux with added FPC-III support