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 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
rsnd_dma_request_channel(struct device_node * of_node,struct rsnd_mod * mod,char * name)213 struct 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
rsnd_dmaen_attach(struct rsnd_dai_stream * io,struct rsnd_dma * dma,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)232 static 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
rsnd_dmaen_pointer(struct rsnd_mod * mod,struct rsnd_dai_stream * io,snd_pcm_uframes_t * pointer)270 static 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
291 static 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 */
304 static 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 };
326 static 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 };
338 static const u8 gen2_id_table_cmd[] = {
339 0x37, /* SCU_CMD0 */
340 0x38, /* SCU_CMD1 */
341 };
342
rsnd_dmapp_get_id(struct rsnd_dai_stream * io,struct rsnd_mod * mod)343 static 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
rsnd_dmapp_get_chcr(struct rsnd_dai_stream * io,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)383 static 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))
rsnd_dmapp_write(struct rsnd_dma * dma,u32 data,u32 reg)394 static 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
rsnd_dmapp_read(struct rsnd_dma * dma,u32 reg)406 static 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
rsnd_dmapp_bset(struct rsnd_dma * dma,u32 data,u32 mask,u32 reg)415 static 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
rsnd_dmapp_stop(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)429 static 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
rsnd_dmapp_start(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)447 static 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
rsnd_dmapp_attach(struct rsnd_dai_stream * io,struct rsnd_dma * dma,struct rsnd_mod * mod_from,struct rsnd_mod * mod_to)461 static 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
481 static 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
526 static dma_addr_t
rsnd_gen2_dma_addr(struct rsnd_dai_stream * io,struct rsnd_mod * mod,int is_play,int is_from)527 rsnd_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
rsnd_dma_addr(struct rsnd_dai_stream * io,struct rsnd_mod * mod,int is_play,int is_from)601 static 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 */
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)620 static 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
rsnd_dma_alloc(struct rsnd_dai_stream * io,struct rsnd_mod * mod,struct rsnd_mod ** dma_mod)728 static 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
rsnd_dma_attach(struct rsnd_dai_stream * io,struct rsnd_mod * mod,struct rsnd_mod ** dma_mod)804 int 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
rsnd_dma_probe(struct rsnd_priv * priv)817 int 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 }
850
