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11#include <linux/delay.h>
12#include <linux/of_dma.h>
13#include "rsnd.h"
14
15
16
17
18#define PDMASAR 0x00
19#define PDMADAR 0x04
20#define PDMACHCR 0x0c
21
22
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
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
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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:
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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
268
269static const u8 gen2_id_table_ssiu[] = {
270 0x00,
271 0x04,
272 0x08,
273 0x0c,
274 0x0d,
275 0x0e,
276 0x0f,
277 0x10,
278 0x11,
279 0x12,
280};
281static const u8 gen2_id_table_scu[] = {
282 0x2d,
283 0x2e,
284 0x2f,
285 0x30,
286 0x31,
287 0x32,
288 0x33,
289 0x34,
290 0x35,
291 0x36,
292};
293static const u8 gen2_id_table_cmd[] = {
294 0x37,
295 0x38,
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) || (size <= id)) {
320 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
321
322 dev_err(dev, "unknown connection (%s[%d])\n",
323 rsnd_mod_name(mod), rsnd_mod_id(mod));
324
325
326 return 0x00;
327 }
328
329 return entry[id];
330}
331
332static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
333 struct rsnd_mod *mod_from,
334 struct rsnd_mod *mod_to)
335{
336 return (rsnd_dmapp_get_id(io, mod_from) << 24) +
337 (rsnd_dmapp_get_id(io, mod_to) << 16);
338}
339
340#define rsnd_dmapp_addr(dmac, dma, reg) \
341 (dmac->base + 0x20 + reg + \
342 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
343static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
344{
345 struct rsnd_mod *mod = rsnd_mod_get(dma);
346 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
347 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
348 struct device *dev = rsnd_priv_to_dev(priv);
349
350 dev_dbg(dev, "w %p : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
351
352 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
353}
354
355static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
356{
357 struct rsnd_mod *mod = rsnd_mod_get(dma);
358 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
359 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
360
361 return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
362}
363
364static int rsnd_dmapp_stop(struct rsnd_mod *mod,
365 struct rsnd_dai_stream *io,
366 struct rsnd_priv *priv)
367{
368 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
369 int i;
370
371 rsnd_dmapp_write(dma, 0, PDMACHCR);
372
373 for (i = 0; i < 1024; i++) {
374 if (0 == rsnd_dmapp_read(dma, PDMACHCR))
375 return 0;
376 udelay(1);
377 }
378
379 return -EIO;
380}
381
382static int rsnd_dmapp_start(struct rsnd_mod *mod,
383 struct rsnd_dai_stream *io,
384 struct rsnd_priv *priv)
385{
386 struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
387 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
388
389 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
390 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
391 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
392
393 return 0;
394}
395
396static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
397 struct rsnd_dma *dma, int id,
398 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
399{
400 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
401 struct rsnd_priv *priv = rsnd_io_to_priv(io);
402 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
403 struct device *dev = rsnd_priv_to_dev(priv);
404
405 dmapp->dmapp_id = dmac->dmapp_num;
406 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
407
408 dmac->dmapp_num++;
409
410 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
411 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
412
413 return 0;
414}
415
416static struct rsnd_mod_ops rsnd_dmapp_ops = {
417 .name = "audmac-pp",
418 .start = rsnd_dmapp_start,
419 .stop = rsnd_dmapp_stop,
420 .quit = rsnd_dmapp_stop,
421};
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441
442#define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
443#define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
444
445#define RDMA_SSIU_I_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i))
446#define RDMA_SSIU_O_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i))
447
448#define RDMA_SSIU_I_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i))
449#define RDMA_SSIU_O_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i))
450
451#define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
452#define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
453
454#define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
455#define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
456
457#define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
458#define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
459
460static dma_addr_t
461rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
462 struct rsnd_mod *mod,
463 int is_play, int is_from)
464{
465 struct rsnd_priv *priv = rsnd_io_to_priv(io);
466 struct device *dev = rsnd_priv_to_dev(priv);
467 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
468 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
469 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod);
470 int use_src = !!rsnd_io_to_mod_src(io);
471 int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
472 !!rsnd_io_to_mod_mix(io) ||
473 !!rsnd_io_to_mod_ctu(io);
474 int id = rsnd_mod_id(mod);
475 struct dma_addr {
476 dma_addr_t out_addr;
477 dma_addr_t in_addr;
478 } dma_addrs[3][2][3] = {
479
480 {{{ 0, 0 },
481
482 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
483 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
484
485 {{ 0, 0, },
486 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
487 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
488 },
489
490
491 {{{ RDMA_SSI_O_N(ssi, id), 0 },
492 { RDMA_SSIU_O_P(ssi, id), 0 },
493 { RDMA_SSIU_O_P(ssi, id), 0 } },
494
495 {{ 0, RDMA_SSI_I_N(ssi, id) },
496 { 0, RDMA_SSIU_I_P(ssi, id) },
497 { 0, RDMA_SSIU_I_P(ssi, id) } }
498 },
499
500
501 {{{ RDMA_SSIU_O_N(ssi, id), 0 },
502 { RDMA_SSIU_O_P(ssi, id), 0 },
503 { RDMA_SSIU_O_P(ssi, id), 0 } },
504
505 {{ 0, RDMA_SSIU_I_N(ssi, id) },
506 { 0, RDMA_SSIU_I_P(ssi, id) },
507 { 0, RDMA_SSIU_I_P(ssi, id) } } },
508 };
509
510
511 if (use_cmd && !use_src)
512 dev_err(dev, "DVC is selected without SRC\n");
513
514
515 if (is_ssi && rsnd_ssi_use_busif(io))
516 is_ssi++;
517
518 return (is_from) ?
519 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
520 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
521}
522
523static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
524 struct rsnd_mod *mod,
525 int is_play, int is_from)
526{
527 struct rsnd_priv *priv = rsnd_io_to_priv(io);
528
529
530
531
532 if (rsnd_is_gen1(priv))
533 return 0;
534
535 if (!mod)
536 return 0;
537
538 return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
539}
540
541#define MOD_MAX (RSND_MOD_MAX + 1)
542static void rsnd_dma_of_path(struct rsnd_mod *this,
543 struct rsnd_dai_stream *io,
544 int is_play,
545 struct rsnd_mod **mod_from,
546 struct rsnd_mod **mod_to)
547{
548 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
549 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
550 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
551 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
552 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
553 struct rsnd_mod *mod[MOD_MAX];
554 struct rsnd_mod *mod_start, *mod_end;
555 struct rsnd_priv *priv = rsnd_mod_to_priv(this);
556 struct device *dev = rsnd_priv_to_dev(priv);
557 int nr, i, idx;
558
559 if (!ssi)
560 return;
561
562 nr = 0;
563 for (i = 0; i < MOD_MAX; i++) {
564 mod[i] = NULL;
565 nr += !!rsnd_io_to_mod(io, i);
566 }
567
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582
583 mod_start = (is_play) ? NULL : ssi;
584 mod_end = (is_play) ? ssi : NULL;
585
586 idx = 0;
587 mod[idx++] = mod_start;
588 for (i = 1; i < nr; i++) {
589 if (src) {
590 mod[idx++] = src;
591 src = NULL;
592 } else if (ctu) {
593 mod[idx++] = ctu;
594 ctu = NULL;
595 } else if (mix) {
596 mod[idx++] = mix;
597 mix = NULL;
598 } else if (dvc) {
599 mod[idx++] = dvc;
600 dvc = NULL;
601 }
602 }
603 mod[idx] = mod_end;
604
605
606
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609
610
611 if ((this == ssi) == (is_play)) {
612 *mod_from = mod[idx - 1];
613 *mod_to = mod[idx];
614 } else {
615 *mod_from = mod[0];
616 *mod_to = mod[1];
617 }
618
619 dev_dbg(dev, "module connection (this is %s[%d])\n",
620 rsnd_mod_name(this), rsnd_mod_id(this));
621 for (i = 0; i <= idx; i++) {
622 dev_dbg(dev, " %s[%d]%s\n",
623 rsnd_mod_name(mod[i]), rsnd_mod_id(mod[i]),
624 (mod[i] == *mod_from) ? " from" :
625 (mod[i] == *mod_to) ? " to" : "");
626 }
627}
628
629int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
630 struct rsnd_mod **dma_mod, int id)
631{
632 struct rsnd_mod *mod_from = NULL;
633 struct rsnd_mod *mod_to = NULL;
634 struct rsnd_priv *priv = rsnd_io_to_priv(io);
635 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
636 struct device *dev = rsnd_priv_to_dev(priv);
637 struct rsnd_mod_ops *ops;
638 enum rsnd_mod_type type;
639 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, int id,
640 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
641 int is_play = rsnd_io_is_play(io);
642 int ret, dma_id;
643
644
645
646
647
648
649
650 if (!dmac)
651 return -EAGAIN;
652
653 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
654
655
656 if (mod_from && mod_to) {
657 ops = &rsnd_dmapp_ops;
658 attach = rsnd_dmapp_attach;
659 dma_id = dmac->dmapp_num;
660 type = RSND_MOD_AUDMAPP;
661 } else {
662 ops = &rsnd_dmaen_ops;
663 attach = rsnd_dmaen_attach;
664 dma_id = dmac->dmaen_num;
665 type = RSND_MOD_AUDMA;
666 }
667
668
669 if (rsnd_is_gen1(priv)) {
670 ops = &rsnd_dmaen_ops;
671 attach = rsnd_dmaen_attach;
672 dma_id = dmac->dmaen_num;
673 type = RSND_MOD_AUDMA;
674 }
675
676 if (!(*dma_mod)) {
677 struct rsnd_dma *dma;
678
679 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
680 if (!dma)
681 return -ENOMEM;
682
683 *dma_mod = rsnd_mod_get(dma);
684
685 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
686 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
687
688 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
689 rsnd_mod_get_status, type, dma_id);
690 if (ret < 0)
691 return ret;
692
693 dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n",
694 rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod),
695 rsnd_mod_name(mod_from), rsnd_mod_id(mod_from),
696 rsnd_mod_name(mod_to), rsnd_mod_id(mod_to));
697
698 ret = attach(io, dma, id, mod_from, mod_to);
699 if (ret < 0)
700 return ret;
701 }
702
703 ret = rsnd_dai_connect(*dma_mod, io, type);
704 if (ret < 0)
705 return ret;
706
707 return 0;
708}
709
710int rsnd_dma_probe(struct rsnd_priv *priv)
711{
712 struct platform_device *pdev = rsnd_priv_to_pdev(priv);
713 struct device *dev = rsnd_priv_to_dev(priv);
714 struct rsnd_dma_ctrl *dmac;
715 struct resource *res;
716
717
718
719
720 if (rsnd_is_gen1(priv))
721 return 0;
722
723
724
725
726 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
727 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
728 if (!dmac || !res) {
729 dev_err(dev, "dma allocate failed\n");
730 return 0;
731 }
732
733 dmac->dmapp_num = 0;
734 dmac->base = devm_ioremap_resource(dev, res);
735 if (IS_ERR(dmac->base))
736 return PTR_ERR(dmac->base);
737
738 priv->dma = dmac;
739
740 return 0;
741}
742
