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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
26struct rsnd_dmaen {
27 struct dma_chan *chan;
28};
29
30struct rsnd_dmapp {
31 int dmapp_id;
32 u32 chcr;
33};
34
35struct 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
45struct 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 */
59static 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
88static void rsnd_dmaen_complete(void *data)
89{
90 struct rsnd_mod *mod = data;
91
92 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
93}
94
95static 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
107static 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
143struct 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
164static 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
178static 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
193static 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
246rsnd_dma_attach_err:
247 rsnd_dmaen_remove(mod, io, priv);
248rsnd_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
259static 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 */
269static 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};
281static 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};
293static const u8 gen2_id_table_cmd[] = {
294 0x37, /* SCU_CMD0 */
295 0x38, /* SCU_CMD1 */
296};
297
298static 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
328static 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))
339static 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
351static 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
360static 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
378static 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
392static 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
412static 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
456static dma_addr_t
457rsnd_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
519static 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 */
538static 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
625int 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
706int 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}
1// SPDX-License-Identifier: GPL-2.0
2//
3// Renesas R-Car Audio DMAC support
4//
5// Copyright (C) 2015 Renesas Electronics Corp.
6// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7
8#include <linux/delay.h>
9#include <linux/of_dma.h>
10#include "rsnd.h"
11
12/*
13 * Audio DMAC peri peri register
14 */
15#define PDMASAR 0x00
16#define PDMADAR 0x04
17#define PDMACHCR 0x0c
18
19/* PDMACHCR */
20#define PDMACHCR_DE (1 << 0)
21
22
23struct rsnd_dmaen {
24 struct dma_chan *chan;
25 dma_cookie_t cookie;
26 unsigned int dma_len;
27};
28
29struct rsnd_dmapp {
30 int dmapp_id;
31 u32 chcr;
32};
33
34struct rsnd_dma {
35 struct rsnd_mod mod;
36 struct rsnd_mod *mod_from;
37 struct rsnd_mod *mod_to;
38 dma_addr_t src_addr;
39 dma_addr_t dst_addr;
40 union {
41 struct rsnd_dmaen en;
42 struct rsnd_dmapp pp;
43 } dma;
44};
45
46struct rsnd_dma_ctrl {
47 void __iomem *base;
48 int dmaen_num;
49 int dmapp_num;
50};
51
52#define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma)
53#define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod)
54#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
55#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
56
57/* for DEBUG */
58static struct rsnd_mod_ops mem_ops = {
59 .name = "mem",
60};
61
62static struct rsnd_mod mem = {
63};
64
65/*
66 * Audio DMAC
67 */
68static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
69 struct rsnd_dai_stream *io)
70{
71 if (rsnd_io_is_working(io))
72 rsnd_dai_period_elapsed(io);
73}
74
75static void rsnd_dmaen_complete(void *data)
76{
77 struct rsnd_mod *mod = data;
78
79 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
80}
81
82static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io,
83 struct rsnd_mod *mod_from,
84 struct rsnd_mod *mod_to)
85{
86 if ((!mod_from && !mod_to) ||
87 (mod_from && mod_to))
88 return NULL;
89
90 if (mod_from)
91 return rsnd_mod_dma_req(io, mod_from);
92 else
93 return rsnd_mod_dma_req(io, mod_to);
94}
95
96static int rsnd_dmaen_stop(struct rsnd_mod *mod,
97 struct rsnd_dai_stream *io,
98 struct rsnd_priv *priv)
99{
100 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
101 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
102
103 if (dmaen->chan)
104 dmaengine_terminate_all(dmaen->chan);
105
106 return 0;
107}
108
109static int rsnd_dmaen_cleanup(struct rsnd_mod *mod,
110 struct rsnd_dai_stream *io,
111 struct rsnd_priv *priv)
112{
113 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
114 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
115
116 /*
117 * DMAEngine release uses mutex lock.
118 * Thus, it shouldn't be called under spinlock.
119 * Let's call it under prepare
120 */
121 if (dmaen->chan)
122 dma_release_channel(dmaen->chan);
123
124 dmaen->chan = NULL;
125
126 return 0;
127}
128
129static int rsnd_dmaen_prepare(struct rsnd_mod *mod,
130 struct rsnd_dai_stream *io,
131 struct rsnd_priv *priv)
132{
133 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
134 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
135 struct device *dev = rsnd_priv_to_dev(priv);
136
137 /* maybe suspended */
138 if (dmaen->chan)
139 return 0;
140
141 /*
142 * DMAEngine request uses mutex lock.
143 * Thus, it shouldn't be called under spinlock.
144 * Let's call it under prepare
145 */
146 dmaen->chan = rsnd_dmaen_request_channel(io,
147 dma->mod_from,
148 dma->mod_to);
149 if (IS_ERR_OR_NULL(dmaen->chan)) {
150 dmaen->chan = NULL;
151 dev_err(dev, "can't get dma channel\n");
152 return -EIO;
153 }
154
155 return 0;
156}
157
158static int rsnd_dmaen_start(struct rsnd_mod *mod,
159 struct rsnd_dai_stream *io,
160 struct rsnd_priv *priv)
161{
162 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
163 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
164 struct snd_pcm_substream *substream = io->substream;
165 struct device *dev = rsnd_priv_to_dev(priv);
166 struct dma_async_tx_descriptor *desc;
167 struct dma_slave_config cfg = {};
168 int is_play = rsnd_io_is_play(io);
169 int ret;
170
171 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
172 cfg.src_addr = dma->src_addr;
173 cfg.dst_addr = dma->dst_addr;
174 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
175 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
176
177 dev_dbg(dev, "%s %pad -> %pad\n",
178 rsnd_mod_name(mod),
179 &cfg.src_addr, &cfg.dst_addr);
180
181 ret = dmaengine_slave_config(dmaen->chan, &cfg);
182 if (ret < 0)
183 return ret;
184
185 desc = dmaengine_prep_dma_cyclic(dmaen->chan,
186 substream->runtime->dma_addr,
187 snd_pcm_lib_buffer_bytes(substream),
188 snd_pcm_lib_period_bytes(substream),
189 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
190 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
191
192 if (!desc) {
193 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
194 return -EIO;
195 }
196
197 desc->callback = rsnd_dmaen_complete;
198 desc->callback_param = rsnd_mod_get(dma);
199
200 dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
201
202 dmaen->cookie = dmaengine_submit(desc);
203 if (dmaen->cookie < 0) {
204 dev_err(dev, "dmaengine_submit() fail\n");
205 return -EIO;
206 }
207
208 dma_async_issue_pending(dmaen->chan);
209
210 return 0;
211}
212
213struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node,
214 struct rsnd_mod *mod, char *name)
215{
216 struct dma_chan *chan = NULL;
217 struct device_node *np;
218 int i = 0;
219
220 for_each_child_of_node(of_node, np) {
221 if (i == rsnd_mod_id_raw(mod) && (!chan))
222 chan = of_dma_request_slave_channel(np, name);
223 i++;
224 }
225
226 /* It should call of_node_put(), since, it is rsnd_xxx_of_node() */
227 of_node_put(of_node);
228
229 return chan;
230}
231
232static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
233 struct rsnd_dma *dma,
234 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
235{
236 struct rsnd_priv *priv = rsnd_io_to_priv(io);
237 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
238 struct dma_chan *chan;
239
240 /* try to get DMAEngine channel */
241 chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
242 if (IS_ERR_OR_NULL(chan)) {
243 /* Let's follow when -EPROBE_DEFER case */
244 if (PTR_ERR(chan) == -EPROBE_DEFER)
245 return PTR_ERR(chan);
246
247 /*
248 * DMA failed. try to PIO mode
249 * see
250 * rsnd_ssi_fallback()
251 * rsnd_rdai_continuance_probe()
252 */
253 return -EAGAIN;
254 }
255
256 /*
257 * use it for IPMMU if needed
258 * see
259 * rsnd_preallocate_pages()
260 */
261 io->dmac_dev = chan->device->dev;
262
263 dma_release_channel(chan);
264
265 dmac->dmaen_num++;
266
267 return 0;
268}
269
270static int rsnd_dmaen_pointer(struct rsnd_mod *mod,
271 struct rsnd_dai_stream *io,
272 snd_pcm_uframes_t *pointer)
273{
274 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
275 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
276 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
277 struct dma_tx_state state;
278 enum dma_status status;
279 unsigned int pos = 0;
280
281 status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state);
282 if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
283 if (state.residue > 0 && state.residue <= dmaen->dma_len)
284 pos = dmaen->dma_len - state.residue;
285 }
286 *pointer = bytes_to_frames(runtime, pos);
287
288 return 0;
289}
290
291static struct rsnd_mod_ops rsnd_dmaen_ops = {
292 .name = "audmac",
293 .prepare = rsnd_dmaen_prepare,
294 .cleanup = rsnd_dmaen_cleanup,
295 .start = rsnd_dmaen_start,
296 .stop = rsnd_dmaen_stop,
297 .pointer = rsnd_dmaen_pointer,
298 .get_status = rsnd_mod_get_status,
299};
300
301/*
302 * Audio DMAC peri peri
303 */
304static const u8 gen2_id_table_ssiu[] = {
305 /* SSI00 ~ SSI07 */
306 0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c,
307 /* SSI10 ~ SSI17 */
308 0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40,
309 /* SSI20 ~ SSI27 */
310 0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44,
311 /* SSI30 ~ SSI37 */
312 0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
313 /* SSI40 ~ SSI47 */
314 0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52,
315 /* SSI5 */
316 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
317 /* SSI6 */
318 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
319 /* SSI7 */
320 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
321 /* SSI8 */
322 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
323 /* SSI90 ~ SSI97 */
324 0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56,
325};
326static const u8 gen2_id_table_scu[] = {
327 0x2d, /* SCU_SRCI0 */
328 0x2e, /* SCU_SRCI1 */
329 0x2f, /* SCU_SRCI2 */
330 0x30, /* SCU_SRCI3 */
331 0x31, /* SCU_SRCI4 */
332 0x32, /* SCU_SRCI5 */
333 0x33, /* SCU_SRCI6 */
334 0x34, /* SCU_SRCI7 */
335 0x35, /* SCU_SRCI8 */
336 0x36, /* SCU_SRCI9 */
337};
338static const u8 gen2_id_table_cmd[] = {
339 0x37, /* SCU_CMD0 */
340 0x38, /* SCU_CMD1 */
341};
342
343static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
344 struct rsnd_mod *mod)
345{
346 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
347 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
348 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
349 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
350 const u8 *entry = NULL;
351 int id = 255;
352 int size = 0;
353
354 if ((mod == ssi) ||
355 (mod == ssiu)) {
356 int busif = rsnd_mod_id_sub(ssiu);
357
358 entry = gen2_id_table_ssiu;
359 size = ARRAY_SIZE(gen2_id_table_ssiu);
360 id = (rsnd_mod_id(mod) * 8) + busif;
361 } else if (mod == src) {
362 entry = gen2_id_table_scu;
363 size = ARRAY_SIZE(gen2_id_table_scu);
364 id = rsnd_mod_id(mod);
365 } else if (mod == dvc) {
366 entry = gen2_id_table_cmd;
367 size = ARRAY_SIZE(gen2_id_table_cmd);
368 id = rsnd_mod_id(mod);
369 }
370
371 if ((!entry) || (size <= id)) {
372 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
373
374 dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod));
375
376 /* use non-prohibited SRS number as error */
377 return 0x00; /* SSI00 */
378 }
379
380 return entry[id];
381}
382
383static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
384 struct rsnd_mod *mod_from,
385 struct rsnd_mod *mod_to)
386{
387 return (rsnd_dmapp_get_id(io, mod_from) << 24) +
388 (rsnd_dmapp_get_id(io, mod_to) << 16);
389}
390
391#define rsnd_dmapp_addr(dmac, dma, reg) \
392 (dmac->base + 0x20 + reg + \
393 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
394static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
395{
396 struct rsnd_mod *mod = rsnd_mod_get(dma);
397 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
398 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
399 struct device *dev = rsnd_priv_to_dev(priv);
400
401 dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
402
403 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
404}
405
406static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
407{
408 struct rsnd_mod *mod = rsnd_mod_get(dma);
409 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
410 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
411
412 return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
413}
414
415static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg)
416{
417 struct rsnd_mod *mod = rsnd_mod_get(dma);
418 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
419 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
420 void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg);
421 u32 val = ioread32(addr);
422
423 val &= ~mask;
424 val |= (data & mask);
425
426 iowrite32(val, addr);
427}
428
429static int rsnd_dmapp_stop(struct rsnd_mod *mod,
430 struct rsnd_dai_stream *io,
431 struct rsnd_priv *priv)
432{
433 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
434 int i;
435
436 rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR);
437
438 for (i = 0; i < 1024; i++) {
439 if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE))
440 return 0;
441 udelay(1);
442 }
443
444 return -EIO;
445}
446
447static int rsnd_dmapp_start(struct rsnd_mod *mod,
448 struct rsnd_dai_stream *io,
449 struct rsnd_priv *priv)
450{
451 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
452 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
453
454 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
455 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
456 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
457
458 return 0;
459}
460
461static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
462 struct rsnd_dma *dma,
463 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
464{
465 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
466 struct rsnd_priv *priv = rsnd_io_to_priv(io);
467 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
468 struct device *dev = rsnd_priv_to_dev(priv);
469
470 dmapp->dmapp_id = dmac->dmapp_num;
471 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
472
473 dmac->dmapp_num++;
474
475 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
476 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
477
478 return 0;
479}
480
481static struct rsnd_mod_ops rsnd_dmapp_ops = {
482 .name = "audmac-pp",
483 .start = rsnd_dmapp_start,
484 .stop = rsnd_dmapp_stop,
485 .quit = rsnd_dmapp_stop,
486 .get_status = rsnd_mod_get_status,
487};
488
489/*
490 * Common DMAC Interface
491 */
492
493/*
494 * DMA read/write register offset
495 *
496 * RSND_xxx_I_N for Audio DMAC input
497 * RSND_xxx_O_N for Audio DMAC output
498 * RSND_xxx_I_P for Audio DMAC peri peri input
499 * RSND_xxx_O_P for Audio DMAC peri peri output
500 *
501 * ex) R-Car H2 case
502 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out
503 * SSI : 0xec541000 / 0xec241008 / 0xec24100c
504 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
505 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
506 * CMD : 0xec500000 / / 0xec008000 0xec308000
507 */
508#define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
509#define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
510
511#define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
512#define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j)
513
514#define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
515#define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j)
516
517#define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
518#define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
519
520#define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
521#define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
522
523#define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
524#define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
525
526static dma_addr_t
527rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
528 struct rsnd_mod *mod,
529 int is_play, int is_from)
530{
531 struct rsnd_priv *priv = rsnd_io_to_priv(io);
532 struct device *dev = rsnd_priv_to_dev(priv);
533 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
534 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
535 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) ||
536 !!(rsnd_io_to_mod_ssiu(io) == mod);
537 int use_src = !!rsnd_io_to_mod_src(io);
538 int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
539 !!rsnd_io_to_mod_mix(io) ||
540 !!rsnd_io_to_mod_ctu(io);
541 int id = rsnd_mod_id(mod);
542 int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io));
543 struct dma_addr {
544 dma_addr_t out_addr;
545 dma_addr_t in_addr;
546 } dma_addrs[3][2][3] = {
547 /* SRC */
548 /* Capture */
549 {{{ 0, 0 },
550 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
551 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
552 /* Playback */
553 {{ 0, 0, },
554 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
555 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
556 },
557 /* SSI */
558 /* Capture */
559 {{{ RDMA_SSI_O_N(ssi, id), 0 },
560 { RDMA_SSIU_O_P(ssi, id, busif), 0 },
561 { RDMA_SSIU_O_P(ssi, id, busif), 0 } },
562 /* Playback */
563 {{ 0, RDMA_SSI_I_N(ssi, id) },
564 { 0, RDMA_SSIU_I_P(ssi, id, busif) },
565 { 0, RDMA_SSIU_I_P(ssi, id, busif) } }
566 },
567 /* SSIU */
568 /* Capture */
569 {{{ RDMA_SSIU_O_N(ssi, id, busif), 0 },
570 { RDMA_SSIU_O_P(ssi, id, busif), 0 },
571 { RDMA_SSIU_O_P(ssi, id, busif), 0 } },
572 /* Playback */
573 {{ 0, RDMA_SSIU_I_N(ssi, id, busif) },
574 { 0, RDMA_SSIU_I_P(ssi, id, busif) },
575 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } },
576 };
577
578 /*
579 * FIXME
580 *
581 * We can't support SSI9-4/5/6/7, because its address is
582 * out of calculation rule
583 */
584 if ((id == 9) && (busif >= 4))
585 dev_err(dev, "This driver doesn't support SSI%d-%d, so far",
586 id, busif);
587
588 /* it shouldn't happen */
589 if (use_cmd && !use_src)
590 dev_err(dev, "DVC is selected without SRC\n");
591
592 /* use SSIU or SSI ? */
593 if (is_ssi && rsnd_ssi_use_busif(io))
594 is_ssi++;
595
596 return (is_from) ?
597 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
598 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
599}
600
601static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
602 struct rsnd_mod *mod,
603 int is_play, int is_from)
604{
605 struct rsnd_priv *priv = rsnd_io_to_priv(io);
606
607 /*
608 * gen1 uses default DMA addr
609 */
610 if (rsnd_is_gen1(priv))
611 return 0;
612
613 if (!mod)
614 return 0;
615
616 return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
617}
618
619#define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
620static void rsnd_dma_of_path(struct rsnd_mod *this,
621 struct rsnd_dai_stream *io,
622 int is_play,
623 struct rsnd_mod **mod_from,
624 struct rsnd_mod **mod_to)
625{
626 struct rsnd_mod *ssi;
627 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
628 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
629 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
630 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
631 struct rsnd_mod *mod[MOD_MAX];
632 struct rsnd_mod *mod_start, *mod_end;
633 struct rsnd_priv *priv = rsnd_mod_to_priv(this);
634 struct device *dev = rsnd_priv_to_dev(priv);
635 int nr, i, idx;
636
637 /*
638 * It should use "rcar_sound,ssiu" on DT.
639 * But, we need to keep compatibility for old version.
640 *
641 * If it has "rcar_sound.ssiu", it will be used.
642 * If not, "rcar_sound.ssi" will be used.
643 * see
644 * rsnd_ssiu_dma_req()
645 * rsnd_ssi_dma_req()
646 */
647 if (rsnd_ssiu_of_node(priv)) {
648 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
649
650 /* use SSIU */
651 ssi = ssiu;
652 if (this == rsnd_io_to_mod_ssi(io))
653 this = ssiu;
654 } else {
655 /* keep compatible, use SSI */
656 ssi = rsnd_io_to_mod_ssi(io);
657 }
658
659 if (!ssi)
660 return;
661
662 nr = 0;
663 for (i = 0; i < MOD_MAX; i++) {
664 mod[i] = NULL;
665 nr += !!rsnd_io_to_mod(io, i);
666 }
667
668 /*
669 * [S] -*-> [E]
670 * [S] -*-> SRC -o-> [E]
671 * [S] -*-> SRC -> DVC -o-> [E]
672 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
673 *
674 * playback [S] = mem
675 * [E] = SSI
676 *
677 * capture [S] = SSI
678 * [E] = mem
679 *
680 * -*-> Audio DMAC
681 * -o-> Audio DMAC peri peri
682 */
683 mod_start = (is_play) ? NULL : ssi;
684 mod_end = (is_play) ? ssi : NULL;
685
686 idx = 0;
687 mod[idx++] = mod_start;
688 for (i = 1; i < nr; i++) {
689 if (src) {
690 mod[idx++] = src;
691 src = NULL;
692 } else if (ctu) {
693 mod[idx++] = ctu;
694 ctu = NULL;
695 } else if (mix) {
696 mod[idx++] = mix;
697 mix = NULL;
698 } else if (dvc) {
699 mod[idx++] = dvc;
700 dvc = NULL;
701 }
702 }
703 mod[idx] = mod_end;
704
705 /*
706 * | SSI | SRC |
707 * -------------+-----+-----+
708 * is_play | o | * |
709 * !is_play | * | o |
710 */
711 if ((this == ssi) == (is_play)) {
712 *mod_from = mod[idx - 1];
713 *mod_to = mod[idx];
714 } else {
715 *mod_from = mod[0];
716 *mod_to = mod[1];
717 }
718
719 dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this));
720 for (i = 0; i <= idx; i++) {
721 dev_dbg(dev, " %s%s\n",
722 rsnd_mod_name(mod[i] ? mod[i] : &mem),
723 (mod[i] == *mod_from) ? " from" :
724 (mod[i] == *mod_to) ? " to" : "");
725 }
726}
727
728static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
729 struct rsnd_mod **dma_mod)
730{
731 struct rsnd_mod *mod_from = NULL;
732 struct rsnd_mod *mod_to = NULL;
733 struct rsnd_priv *priv = rsnd_io_to_priv(io);
734 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
735 struct device *dev = rsnd_priv_to_dev(priv);
736 struct rsnd_dma *dma;
737 struct rsnd_mod_ops *ops;
738 enum rsnd_mod_type type;
739 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,
740 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
741 int is_play = rsnd_io_is_play(io);
742 int ret, dma_id;
743
744 /*
745 * DMA failed. try to PIO mode
746 * see
747 * rsnd_ssi_fallback()
748 * rsnd_rdai_continuance_probe()
749 */
750 if (!dmac)
751 return -EAGAIN;
752
753 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
754
755 /* for Gen2 or later */
756 if (mod_from && mod_to) {
757 ops = &rsnd_dmapp_ops;
758 attach = rsnd_dmapp_attach;
759 dma_id = dmac->dmapp_num;
760 type = RSND_MOD_AUDMAPP;
761 } else {
762 ops = &rsnd_dmaen_ops;
763 attach = rsnd_dmaen_attach;
764 dma_id = dmac->dmaen_num;
765 type = RSND_MOD_AUDMA;
766 }
767
768 /* for Gen1, overwrite */
769 if (rsnd_is_gen1(priv)) {
770 ops = &rsnd_dmaen_ops;
771 attach = rsnd_dmaen_attach;
772 dma_id = dmac->dmaen_num;
773 type = RSND_MOD_AUDMA;
774 }
775
776 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
777 if (!dma)
778 return -ENOMEM;
779
780 *dma_mod = rsnd_mod_get(dma);
781
782 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
783 type, dma_id);
784 if (ret < 0)
785 return ret;
786
787 dev_dbg(dev, "%s %s -> %s\n",
788 rsnd_mod_name(*dma_mod),
789 rsnd_mod_name(mod_from ? mod_from : &mem),
790 rsnd_mod_name(mod_to ? mod_to : &mem));
791
792 ret = attach(io, dma, mod_from, mod_to);
793 if (ret < 0)
794 return ret;
795
796 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
797 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
798 dma->mod_from = mod_from;
799 dma->mod_to = mod_to;
800
801 return 0;
802}
803
804int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
805 struct rsnd_mod **dma_mod)
806{
807 if (!(*dma_mod)) {
808 int ret = rsnd_dma_alloc(io, mod, dma_mod);
809
810 if (ret < 0)
811 return ret;
812 }
813
814 return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);
815}
816
817int rsnd_dma_probe(struct rsnd_priv *priv)
818{
819 struct platform_device *pdev = rsnd_priv_to_pdev(priv);
820 struct device *dev = rsnd_priv_to_dev(priv);
821 struct rsnd_dma_ctrl *dmac;
822 struct resource *res;
823
824 /*
825 * for Gen1
826 */
827 if (rsnd_is_gen1(priv))
828 return 0;
829
830 /*
831 * for Gen2 or later
832 */
833 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
834 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
835 if (!dmac || !res) {
836 dev_err(dev, "dma allocate failed\n");
837 return 0; /* it will be PIO mode */
838 }
839
840 dmac->dmapp_num = 0;
841 dmac->base = devm_ioremap_resource(dev, res);
842 if (IS_ERR(dmac->base))
843 return PTR_ERR(dmac->base);
844
845 priv->dma = dmac;
846
847 /* dummy mem mod for debug */
848 return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0);
849}