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
23 struct rsnd_dmaen {
24 struct dma_chan *chan;
25 dma_cookie_t cookie;
26 unsigned int dma_len;
27 };
28
29 struct rsnd_dmapp {
30 int dmapp_id;
31 u32 chcr;
32 };
33
34 struct 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
46 struct 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 */
58 static struct rsnd_mod_ops mem_ops = {
59 .name = "mem",
60 };
61
62 static struct rsnd_mod mem = {
63 };
64
65 /*
66 * Audio DMAC
67 */
__rsnd_dmaen_complete(struct rsnd_mod * mod,struct rsnd_dai_stream * io)68 static 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
rsnd_dmaen_complete(void * data)75 static void rsnd_dmaen_complete(void *data)
76 {
77 struct rsnd_mod *mod = data;
78
79 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
80 }
81
rsnd_dmaen_request_channel(struct rsnd_dai_stream * io,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)82 static 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
rsnd_dmaen_stop(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)96 static 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
rsnd_dmaen_cleanup(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)109 static 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
rsnd_dmaen_prepare(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)129 static 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
rsnd_dmaen_start(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)158 static 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 enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
169 int is_play = rsnd_io_is_play(io);
170 int ret;
171
172 /*
173 * in case of monaural data writing or reading through Audio-DMAC
174 * data is always in Left Justified format, so both src and dst
175 * DMA Bus width need to be set equal to physical data width.
176 */
177 if (rsnd_runtime_channel_original(io) == 1) {
178 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
179 int bits = snd_pcm_format_physical_width(runtime->format);
180
181 switch (bits) {
182 case 8:
183 buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
184 break;
185 case 16:
186 buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
187 break;
188 case 32:
189 buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
190 break;
191 default:
192 dev_err(dev, "invalid format width %d\n", bits);
193 return -EINVAL;
194 }
195 }
196
197 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
198 cfg.src_addr = dma->src_addr;
199 cfg.dst_addr = dma->dst_addr;
200 cfg.src_addr_width = buswidth;
201 cfg.dst_addr_width = buswidth;
202
203 dev_dbg(dev, "%s %pad -> %pad\n",
204 rsnd_mod_name(mod),
205 &cfg.src_addr, &cfg.dst_addr);
206
207 ret = dmaengine_slave_config(dmaen->chan, &cfg);
208 if (ret < 0)
209 return ret;
210
211 desc = dmaengine_prep_dma_cyclic(dmaen->chan,
212 substream->runtime->dma_addr,
213 snd_pcm_lib_buffer_bytes(substream),
214 snd_pcm_lib_period_bytes(substream),
215 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
216 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
217
218 if (!desc) {
219 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
220 return -EIO;
221 }
222
223 desc->callback = rsnd_dmaen_complete;
224 desc->callback_param = rsnd_mod_get(dma);
225
226 dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
227
228 dmaen->cookie = dmaengine_submit(desc);
229 if (dmaen->cookie < 0) {
230 dev_err(dev, "dmaengine_submit() fail\n");
231 return -EIO;
232 }
233
234 dma_async_issue_pending(dmaen->chan);
235
236 return 0;
237 }
238
rsnd_dma_request_channel(struct device_node * of_node,struct rsnd_mod * mod,char * name)239 struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node,
240 struct rsnd_mod *mod, char *name)
241 {
242 struct dma_chan *chan = NULL;
243 struct device_node *np;
244 int i = 0;
245
246 for_each_child_of_node(of_node, np) {
247 if (i == rsnd_mod_id_raw(mod) && (!chan))
248 chan = of_dma_request_slave_channel(np, name);
249 i++;
250 }
251
252 /* It should call of_node_put(), since, it is rsnd_xxx_of_node() */
253 of_node_put(of_node);
254
255 return chan;
256 }
257
rsnd_dmaen_attach(struct rsnd_dai_stream * io,struct rsnd_dma * dma,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)258 static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
259 struct rsnd_dma *dma,
260 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
261 {
262 struct rsnd_priv *priv = rsnd_io_to_priv(io);
263 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
264 struct dma_chan *chan;
265
266 /* try to get DMAEngine channel */
267 chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
268 if (IS_ERR_OR_NULL(chan)) {
269 /* Let's follow when -EPROBE_DEFER case */
270 if (PTR_ERR(chan) == -EPROBE_DEFER)
271 return PTR_ERR(chan);
272
273 /*
274 * DMA failed. try to PIO mode
275 * see
276 * rsnd_ssi_fallback()
277 * rsnd_rdai_continuance_probe()
278 */
279 return -EAGAIN;
280 }
281
282 /*
283 * use it for IPMMU if needed
284 * see
285 * rsnd_preallocate_pages()
286 */
287 io->dmac_dev = chan->device->dev;
288
289 dma_release_channel(chan);
290
291 dmac->dmaen_num++;
292
293 return 0;
294 }
295
rsnd_dmaen_pointer(struct rsnd_mod * mod,struct rsnd_dai_stream * io,snd_pcm_uframes_t * pointer)296 static int rsnd_dmaen_pointer(struct rsnd_mod *mod,
297 struct rsnd_dai_stream *io,
298 snd_pcm_uframes_t *pointer)
299 {
300 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
301 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
302 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
303 struct dma_tx_state state;
304 enum dma_status status;
305 unsigned int pos = 0;
306
307 status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state);
308 if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
309 if (state.residue > 0 && state.residue <= dmaen->dma_len)
310 pos = dmaen->dma_len - state.residue;
311 }
312 *pointer = bytes_to_frames(runtime, pos);
313
314 return 0;
315 }
316
317 static struct rsnd_mod_ops rsnd_dmaen_ops = {
318 .name = "audmac",
319 .prepare = rsnd_dmaen_prepare,
320 .cleanup = rsnd_dmaen_cleanup,
321 .start = rsnd_dmaen_start,
322 .stop = rsnd_dmaen_stop,
323 .pointer = rsnd_dmaen_pointer,
324 .get_status = rsnd_mod_get_status,
325 };
326
327 /*
328 * Audio DMAC peri peri
329 */
330 static const u8 gen2_id_table_ssiu[] = {
331 /* SSI00 ~ SSI07 */
332 0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c,
333 /* SSI10 ~ SSI17 */
334 0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40,
335 /* SSI20 ~ SSI27 */
336 0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44,
337 /* SSI30 ~ SSI37 */
338 0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
339 /* SSI40 ~ SSI47 */
340 0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52,
341 /* SSI5 */
342 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
343 /* SSI6 */
344 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
345 /* SSI7 */
346 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
347 /* SSI8 */
348 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
349 /* SSI90 ~ SSI97 */
350 0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56,
351 };
352 static const u8 gen2_id_table_scu[] = {
353 0x2d, /* SCU_SRCI0 */
354 0x2e, /* SCU_SRCI1 */
355 0x2f, /* SCU_SRCI2 */
356 0x30, /* SCU_SRCI3 */
357 0x31, /* SCU_SRCI4 */
358 0x32, /* SCU_SRCI5 */
359 0x33, /* SCU_SRCI6 */
360 0x34, /* SCU_SRCI7 */
361 0x35, /* SCU_SRCI8 */
362 0x36, /* SCU_SRCI9 */
363 };
364 static const u8 gen2_id_table_cmd[] = {
365 0x37, /* SCU_CMD0 */
366 0x38, /* SCU_CMD1 */
367 };
368
rsnd_dmapp_get_id(struct rsnd_dai_stream * io,struct rsnd_mod * mod)369 static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
370 struct rsnd_mod *mod)
371 {
372 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
373 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
374 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
375 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
376 const u8 *entry = NULL;
377 int id = 255;
378 int size = 0;
379
380 if ((mod == ssi) ||
381 (mod == ssiu)) {
382 int busif = rsnd_mod_id_sub(ssiu);
383
384 entry = gen2_id_table_ssiu;
385 size = ARRAY_SIZE(gen2_id_table_ssiu);
386 id = (rsnd_mod_id(mod) * 8) + busif;
387 } else if (mod == src) {
388 entry = gen2_id_table_scu;
389 size = ARRAY_SIZE(gen2_id_table_scu);
390 id = rsnd_mod_id(mod);
391 } else if (mod == dvc) {
392 entry = gen2_id_table_cmd;
393 size = ARRAY_SIZE(gen2_id_table_cmd);
394 id = rsnd_mod_id(mod);
395 }
396
397 if ((!entry) || (size <= id)) {
398 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
399
400 dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod));
401
402 /* use non-prohibited SRS number as error */
403 return 0x00; /* SSI00 */
404 }
405
406 return entry[id];
407 }
408
rsnd_dmapp_get_chcr(struct rsnd_dai_stream * io,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)409 static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
410 struct rsnd_mod *mod_from,
411 struct rsnd_mod *mod_to)
412 {
413 return (rsnd_dmapp_get_id(io, mod_from) << 24) +
414 (rsnd_dmapp_get_id(io, mod_to) << 16);
415 }
416
417 #define rsnd_dmapp_addr(dmac, dma, reg) \
418 (dmac->base + 0x20 + reg + \
419 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
rsnd_dmapp_write(struct rsnd_dma * dma,u32 data,u32 reg)420 static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
421 {
422 struct rsnd_mod *mod = rsnd_mod_get(dma);
423 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
424 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
425 struct device *dev = rsnd_priv_to_dev(priv);
426
427 dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
428
429 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
430 }
431
rsnd_dmapp_read(struct rsnd_dma * dma,u32 reg)432 static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
433 {
434 struct rsnd_mod *mod = rsnd_mod_get(dma);
435 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
436 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
437
438 return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
439 }
440
rsnd_dmapp_bset(struct rsnd_dma * dma,u32 data,u32 mask,u32 reg)441 static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg)
442 {
443 struct rsnd_mod *mod = rsnd_mod_get(dma);
444 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
445 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
446 void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg);
447 u32 val = ioread32(addr);
448
449 val &= ~mask;
450 val |= (data & mask);
451
452 iowrite32(val, addr);
453 }
454
rsnd_dmapp_stop(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)455 static int rsnd_dmapp_stop(struct rsnd_mod *mod,
456 struct rsnd_dai_stream *io,
457 struct rsnd_priv *priv)
458 {
459 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
460 int i;
461
462 rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR);
463
464 for (i = 0; i < 1024; i++) {
465 if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE))
466 return 0;
467 udelay(1);
468 }
469
470 return -EIO;
471 }
472
rsnd_dmapp_start(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)473 static int rsnd_dmapp_start(struct rsnd_mod *mod,
474 struct rsnd_dai_stream *io,
475 struct rsnd_priv *priv)
476 {
477 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
478 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
479
480 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
481 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
482 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
483
484 return 0;
485 }
486
rsnd_dmapp_attach(struct rsnd_dai_stream * io,struct rsnd_dma * dma,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)487 static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
488 struct rsnd_dma *dma,
489 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
490 {
491 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
492 struct rsnd_priv *priv = rsnd_io_to_priv(io);
493 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
494 struct device *dev = rsnd_priv_to_dev(priv);
495
496 dmapp->dmapp_id = dmac->dmapp_num;
497 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
498
499 dmac->dmapp_num++;
500
501 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
502 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
503
504 return 0;
505 }
506
507 static struct rsnd_mod_ops rsnd_dmapp_ops = {
508 .name = "audmac-pp",
509 .start = rsnd_dmapp_start,
510 .stop = rsnd_dmapp_stop,
511 .quit = rsnd_dmapp_stop,
512 .get_status = rsnd_mod_get_status,
513 };
514
515 /*
516 * Common DMAC Interface
517 */
518
519 /*
520 * DMA read/write register offset
521 *
522 * RSND_xxx_I_N for Audio DMAC input
523 * RSND_xxx_O_N for Audio DMAC output
524 * RSND_xxx_I_P for Audio DMAC peri peri input
525 * RSND_xxx_O_P for Audio DMAC peri peri output
526 *
527 * ex) R-Car H2 case
528 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out
529 * SSI : 0xec541000 / 0xec241008 / 0xec24100c
530 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
531 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
532 * CMD : 0xec500000 / / 0xec008000 0xec308000
533 */
534 #define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
535 #define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
536
537 #define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
538 #define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j)
539
540 #define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
541 #define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j)
542
543 #define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
544 #define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
545
546 #define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
547 #define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
548
549 #define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
550 #define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
551
552 static dma_addr_t
rsnd_gen2_dma_addr(struct rsnd_dai_stream * io,struct rsnd_mod * mod,int is_play,int is_from)553 rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
554 struct rsnd_mod *mod,
555 int is_play, int is_from)
556 {
557 struct rsnd_priv *priv = rsnd_io_to_priv(io);
558 struct device *dev = rsnd_priv_to_dev(priv);
559 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
560 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
561 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) ||
562 !!(rsnd_io_to_mod_ssiu(io) == mod);
563 int use_src = !!rsnd_io_to_mod_src(io);
564 int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
565 !!rsnd_io_to_mod_mix(io) ||
566 !!rsnd_io_to_mod_ctu(io);
567 int id = rsnd_mod_id(mod);
568 int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io));
569 struct dma_addr {
570 dma_addr_t out_addr;
571 dma_addr_t in_addr;
572 } dma_addrs[3][2][3] = {
573 /* SRC */
574 /* Capture */
575 {{{ 0, 0 },
576 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
577 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
578 /* Playback */
579 {{ 0, 0, },
580 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
581 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
582 },
583 /* SSI */
584 /* Capture */
585 {{{ RDMA_SSI_O_N(ssi, id), 0 },
586 { RDMA_SSIU_O_P(ssi, id, busif), 0 },
587 { RDMA_SSIU_O_P(ssi, id, busif), 0 } },
588 /* Playback */
589 {{ 0, RDMA_SSI_I_N(ssi, id) },
590 { 0, RDMA_SSIU_I_P(ssi, id, busif) },
591 { 0, RDMA_SSIU_I_P(ssi, id, busif) } }
592 },
593 /* SSIU */
594 /* Capture */
595 {{{ RDMA_SSIU_O_N(ssi, id, busif), 0 },
596 { RDMA_SSIU_O_P(ssi, id, busif), 0 },
597 { RDMA_SSIU_O_P(ssi, id, busif), 0 } },
598 /* Playback */
599 {{ 0, RDMA_SSIU_I_N(ssi, id, busif) },
600 { 0, RDMA_SSIU_I_P(ssi, id, busif) },
601 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } },
602 };
603
604 /*
605 * FIXME
606 *
607 * We can't support SSI9-4/5/6/7, because its address is
608 * out of calculation rule
609 */
610 if ((id == 9) && (busif >= 4))
611 dev_err(dev, "This driver doesn't support SSI%d-%d, so far",
612 id, busif);
613
614 /* it shouldn't happen */
615 if (use_cmd && !use_src)
616 dev_err(dev, "DVC is selected without SRC\n");
617
618 /* use SSIU or SSI ? */
619 if (is_ssi && rsnd_ssi_use_busif(io))
620 is_ssi++;
621
622 return (is_from) ?
623 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
624 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
625 }
626
rsnd_dma_addr(struct rsnd_dai_stream * io,struct rsnd_mod * mod,int is_play,int is_from)627 static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
628 struct rsnd_mod *mod,
629 int is_play, int is_from)
630 {
631 struct rsnd_priv *priv = rsnd_io_to_priv(io);
632
633 /*
634 * gen1 uses default DMA addr
635 */
636 if (rsnd_is_gen1(priv))
637 return 0;
638
639 if (!mod)
640 return 0;
641
642 return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
643 }
644
645 #define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
rsnd_dma_of_path(struct rsnd_mod * this,struct rsnd_dai_stream * io,int is_play,struct rsnd_mod ** mod_from,struct rsnd_mod ** mod_to)646 static void rsnd_dma_of_path(struct rsnd_mod *this,
647 struct rsnd_dai_stream *io,
648 int is_play,
649 struct rsnd_mod **mod_from,
650 struct rsnd_mod **mod_to)
651 {
652 struct rsnd_mod *ssi;
653 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
654 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
655 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
656 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
657 struct rsnd_mod *mod[MOD_MAX];
658 struct rsnd_mod *mod_start, *mod_end;
659 struct rsnd_priv *priv = rsnd_mod_to_priv(this);
660 struct device *dev = rsnd_priv_to_dev(priv);
661 int nr, i, idx;
662
663 /*
664 * It should use "rcar_sound,ssiu" on DT.
665 * But, we need to keep compatibility for old version.
666 *
667 * If it has "rcar_sound.ssiu", it will be used.
668 * If not, "rcar_sound.ssi" will be used.
669 * see
670 * rsnd_ssiu_dma_req()
671 * rsnd_ssi_dma_req()
672 */
673 if (rsnd_ssiu_of_node(priv)) {
674 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
675
676 /* use SSIU */
677 ssi = ssiu;
678 if (this == rsnd_io_to_mod_ssi(io))
679 this = ssiu;
680 } else {
681 /* keep compatible, use SSI */
682 ssi = rsnd_io_to_mod_ssi(io);
683 }
684
685 if (!ssi)
686 return;
687
688 nr = 0;
689 for (i = 0; i < MOD_MAX; i++) {
690 mod[i] = NULL;
691 nr += !!rsnd_io_to_mod(io, i);
692 }
693
694 /*
695 * [S] -*-> [E]
696 * [S] -*-> SRC -o-> [E]
697 * [S] -*-> SRC -> DVC -o-> [E]
698 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
699 *
700 * playback [S] = mem
701 * [E] = SSI
702 *
703 * capture [S] = SSI
704 * [E] = mem
705 *
706 * -*-> Audio DMAC
707 * -o-> Audio DMAC peri peri
708 */
709 mod_start = (is_play) ? NULL : ssi;
710 mod_end = (is_play) ? ssi : NULL;
711
712 idx = 0;
713 mod[idx++] = mod_start;
714 for (i = 1; i < nr; i++) {
715 if (src) {
716 mod[idx++] = src;
717 src = NULL;
718 } else if (ctu) {
719 mod[idx++] = ctu;
720 ctu = NULL;
721 } else if (mix) {
722 mod[idx++] = mix;
723 mix = NULL;
724 } else if (dvc) {
725 mod[idx++] = dvc;
726 dvc = NULL;
727 }
728 }
729 mod[idx] = mod_end;
730
731 /*
732 * | SSI | SRC |
733 * -------------+-----+-----+
734 * is_play | o | * |
735 * !is_play | * | o |
736 */
737 if ((this == ssi) == (is_play)) {
738 *mod_from = mod[idx - 1];
739 *mod_to = mod[idx];
740 } else {
741 *mod_from = mod[0];
742 *mod_to = mod[1];
743 }
744
745 dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this));
746 for (i = 0; i <= idx; i++) {
747 dev_dbg(dev, " %s%s\n",
748 rsnd_mod_name(mod[i] ? mod[i] : &mem),
749 (mod[i] == *mod_from) ? " from" :
750 (mod[i] == *mod_to) ? " to" : "");
751 }
752 }
753
rsnd_dma_alloc(struct rsnd_dai_stream * io,struct rsnd_mod * mod,struct rsnd_mod ** dma_mod)754 static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
755 struct rsnd_mod **dma_mod)
756 {
757 struct rsnd_mod *mod_from = NULL;
758 struct rsnd_mod *mod_to = NULL;
759 struct rsnd_priv *priv = rsnd_io_to_priv(io);
760 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
761 struct device *dev = rsnd_priv_to_dev(priv);
762 struct rsnd_dma *dma;
763 struct rsnd_mod_ops *ops;
764 enum rsnd_mod_type type;
765 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,
766 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
767 int is_play = rsnd_io_is_play(io);
768 int ret, dma_id;
769
770 /*
771 * DMA failed. try to PIO mode
772 * see
773 * rsnd_ssi_fallback()
774 * rsnd_rdai_continuance_probe()
775 */
776 if (!dmac)
777 return -EAGAIN;
778
779 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
780
781 /* for Gen2 or later */
782 if (mod_from && mod_to) {
783 ops = &rsnd_dmapp_ops;
784 attach = rsnd_dmapp_attach;
785 dma_id = dmac->dmapp_num;
786 type = RSND_MOD_AUDMAPP;
787 } else {
788 ops = &rsnd_dmaen_ops;
789 attach = rsnd_dmaen_attach;
790 dma_id = dmac->dmaen_num;
791 type = RSND_MOD_AUDMA;
792 }
793
794 /* for Gen1, overwrite */
795 if (rsnd_is_gen1(priv)) {
796 ops = &rsnd_dmaen_ops;
797 attach = rsnd_dmaen_attach;
798 dma_id = dmac->dmaen_num;
799 type = RSND_MOD_AUDMA;
800 }
801
802 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
803 if (!dma)
804 return -ENOMEM;
805
806 *dma_mod = rsnd_mod_get(dma);
807
808 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
809 type, dma_id);
810 if (ret < 0)
811 return ret;
812
813 dev_dbg(dev, "%s %s -> %s\n",
814 rsnd_mod_name(*dma_mod),
815 rsnd_mod_name(mod_from ? mod_from : &mem),
816 rsnd_mod_name(mod_to ? mod_to : &mem));
817
818 ret = attach(io, dma, mod_from, mod_to);
819 if (ret < 0)
820 return ret;
821
822 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
823 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
824 dma->mod_from = mod_from;
825 dma->mod_to = mod_to;
826
827 return 0;
828 }
829
rsnd_dma_attach(struct rsnd_dai_stream * io,struct rsnd_mod * mod,struct rsnd_mod ** dma_mod)830 int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
831 struct rsnd_mod **dma_mod)
832 {
833 if (!(*dma_mod)) {
834 int ret = rsnd_dma_alloc(io, mod, dma_mod);
835
836 if (ret < 0)
837 return ret;
838 }
839
840 return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);
841 }
842
rsnd_dma_probe(struct rsnd_priv * priv)843 int rsnd_dma_probe(struct rsnd_priv *priv)
844 {
845 struct platform_device *pdev = rsnd_priv_to_pdev(priv);
846 struct device *dev = rsnd_priv_to_dev(priv);
847 struct rsnd_dma_ctrl *dmac;
848 struct resource *res;
849
850 /*
851 * for Gen1
852 */
853 if (rsnd_is_gen1(priv))
854 return 0;
855
856 /*
857 * for Gen2 or later
858 */
859 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
860 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
861 if (!dmac || !res) {
862 dev_err(dev, "dma allocate failed\n");
863 return 0; /* it will be PIO mode */
864 }
865
866 dmac->dmapp_num = 0;
867 dmac->base = devm_ioremap_resource(dev, res);
868 if (IS_ERR(dmac->base))
869 return PTR_ERR(dmac->base);
870
871 priv->dma = dmac;
872
873 /* dummy mem mod for debug */
874 return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0);
875 }
876
