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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
4 * All rights reserved.
5 */
6
7#include <linux/clk.h>
8#include <linux/mmc/sdio_func.h>
9#include <linux/mmc/sdio_ids.h>
10#include <linux/mmc/host.h>
11#include <linux/mmc/sdio.h>
12#include <linux/of_irq.h>
13
14#include "netdev.h"
15#include "cfg80211.h"
16
17#define SDIO_MODALIAS "wilc1000_sdio"
18
19static const struct sdio_device_id wilc_sdio_ids[] = {
20 { SDIO_DEVICE(SDIO_VENDOR_ID_MICROCHIP_WILC, SDIO_DEVICE_ID_MICROCHIP_WILC1000) },
21 { },
22};
23MODULE_DEVICE_TABLE(sdio, wilc_sdio_ids);
24
25#define WILC_SDIO_BLOCK_SIZE 512
26
27struct wilc_sdio {
28 bool irq_gpio;
29 u32 block_size;
30 bool isinit;
31 u8 *cmd53_buf;
32};
33
34struct sdio_cmd52 {
35 u32 read_write: 1;
36 u32 function: 3;
37 u32 raw: 1;
38 u32 address: 17;
39 u32 data: 8;
40};
41
42struct sdio_cmd53 {
43 u32 read_write: 1;
44 u32 function: 3;
45 u32 block_mode: 1;
46 u32 increment: 1;
47 u32 address: 17;
48 u32 count: 9;
49 u8 *buffer;
50 u32 block_size;
51 bool use_global_buf;
52};
53
54static const struct wilc_hif_func wilc_hif_sdio;
55
56static void wilc_sdio_interrupt(struct sdio_func *func)
57{
58 sdio_release_host(func);
59 wilc_handle_isr(sdio_get_drvdata(func));
60 sdio_claim_host(func);
61}
62
63static int wilc_sdio_cmd52(struct wilc *wilc, struct sdio_cmd52 *cmd)
64{
65 struct sdio_func *func = container_of(wilc->dev, struct sdio_func, dev);
66 int ret;
67 u8 data;
68
69 sdio_claim_host(func);
70
71 func->num = cmd->function;
72 if (cmd->read_write) { /* write */
73 if (cmd->raw) {
74 sdio_writeb(func, cmd->data, cmd->address, &ret);
75 data = sdio_readb(func, cmd->address, &ret);
76 cmd->data = data;
77 } else {
78 sdio_writeb(func, cmd->data, cmd->address, &ret);
79 }
80 } else { /* read */
81 data = sdio_readb(func, cmd->address, &ret);
82 cmd->data = data;
83 }
84
85 sdio_release_host(func);
86
87 if (ret)
88 dev_err(&func->dev, "%s..failed, err(%d)\n", __func__, ret);
89 return ret;
90}
91
92static int wilc_sdio_cmd53(struct wilc *wilc, struct sdio_cmd53 *cmd)
93{
94 struct sdio_func *func = container_of(wilc->dev, struct sdio_func, dev);
95 int size, ret;
96 struct wilc_sdio *sdio_priv = wilc->bus_data;
97 u8 *buf = cmd->buffer;
98
99 sdio_claim_host(func);
100
101 func->num = cmd->function;
102 func->cur_blksize = cmd->block_size;
103 if (cmd->block_mode)
104 size = cmd->count * cmd->block_size;
105 else
106 size = cmd->count;
107
108 if (cmd->use_global_buf) {
109 if (size > sizeof(u32)) {
110 ret = -EINVAL;
111 goto out;
112 }
113 buf = sdio_priv->cmd53_buf;
114 }
115
116 if (cmd->read_write) { /* write */
117 if (cmd->use_global_buf)
118 memcpy(buf, cmd->buffer, size);
119
120 ret = sdio_memcpy_toio(func, cmd->address, buf, size);
121 } else { /* read */
122 ret = sdio_memcpy_fromio(func, buf, cmd->address, size);
123
124 if (cmd->use_global_buf)
125 memcpy(cmd->buffer, buf, size);
126 }
127out:
128 sdio_release_host(func);
129
130 if (ret)
131 dev_err(&func->dev, "%s..failed, err(%d)\n", __func__, ret);
132
133 return ret;
134}
135
136static int wilc_sdio_probe(struct sdio_func *func,
137 const struct sdio_device_id *id)
138{
139 struct wilc *wilc;
140 int ret;
141 struct wilc_sdio *sdio_priv;
142
143 sdio_priv = kzalloc(sizeof(*sdio_priv), GFP_KERNEL);
144 if (!sdio_priv)
145 return -ENOMEM;
146
147 sdio_priv->cmd53_buf = kzalloc(sizeof(u32), GFP_KERNEL);
148 if (!sdio_priv->cmd53_buf) {
149 ret = -ENOMEM;
150 goto free;
151 }
152
153 ret = wilc_cfg80211_init(&wilc, &func->dev, WILC_HIF_SDIO,
154 &wilc_hif_sdio);
155 if (ret)
156 goto free;
157
158 if (IS_ENABLED(CONFIG_WILC1000_HW_OOB_INTR)) {
159 struct device_node *np = func->card->dev.of_node;
160 int irq_num = of_irq_get(np, 0);
161
162 if (irq_num > 0) {
163 wilc->dev_irq_num = irq_num;
164 sdio_priv->irq_gpio = true;
165 }
166 }
167
168 sdio_set_drvdata(func, wilc);
169 wilc->bus_data = sdio_priv;
170 wilc->dev = &func->dev;
171
172 wilc->rtc_clk = devm_clk_get_optional(&func->card->dev, "rtc");
173 if (IS_ERR(wilc->rtc_clk)) {
174 ret = PTR_ERR(wilc->rtc_clk);
175 goto dispose_irq;
176 }
177 clk_prepare_enable(wilc->rtc_clk);
178
179 dev_info(&func->dev, "Driver Initializing success\n");
180 return 0;
181
182dispose_irq:
183 irq_dispose_mapping(wilc->dev_irq_num);
184 wilc_netdev_cleanup(wilc);
185free:
186 kfree(sdio_priv->cmd53_buf);
187 kfree(sdio_priv);
188 return ret;
189}
190
191static void wilc_sdio_remove(struct sdio_func *func)
192{
193 struct wilc *wilc = sdio_get_drvdata(func);
194 struct wilc_sdio *sdio_priv = wilc->bus_data;
195
196 clk_disable_unprepare(wilc->rtc_clk);
197 wilc_netdev_cleanup(wilc);
198 kfree(sdio_priv->cmd53_buf);
199 kfree(sdio_priv);
200}
201
202static int wilc_sdio_reset(struct wilc *wilc)
203{
204 struct sdio_cmd52 cmd;
205 int ret;
206 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
207
208 cmd.read_write = 1;
209 cmd.function = 0;
210 cmd.raw = 0;
211 cmd.address = SDIO_CCCR_ABORT;
212 cmd.data = WILC_SDIO_CCCR_ABORT_RESET;
213 ret = wilc_sdio_cmd52(wilc, &cmd);
214 if (ret) {
215 dev_err(&func->dev, "Fail cmd 52, reset cmd ...\n");
216 return ret;
217 }
218 return 0;
219}
220
221static bool wilc_sdio_is_init(struct wilc *wilc)
222{
223 struct wilc_sdio *sdio_priv = wilc->bus_data;
224
225 return sdio_priv->isinit;
226}
227
228static int wilc_sdio_suspend(struct device *dev)
229{
230 struct sdio_func *func = dev_to_sdio_func(dev);
231 struct wilc *wilc = sdio_get_drvdata(func);
232 int ret;
233
234 dev_info(dev, "sdio suspend\n");
235 chip_wakeup(wilc);
236
237 if (!IS_ERR(wilc->rtc_clk))
238 clk_disable_unprepare(wilc->rtc_clk);
239
240 if (wilc->suspend_event) {
241 host_sleep_notify(wilc);
242 chip_allow_sleep(wilc);
243 }
244
245 ret = wilc_sdio_reset(wilc);
246 if (ret) {
247 dev_err(&func->dev, "Fail reset sdio\n");
248 return ret;
249 }
250 sdio_claim_host(func);
251
252 return 0;
253}
254
255static int wilc_sdio_enable_interrupt(struct wilc *dev)
256{
257 struct sdio_func *func = container_of(dev->dev, struct sdio_func, dev);
258 int ret = 0;
259
260 sdio_claim_host(func);
261 ret = sdio_claim_irq(func, wilc_sdio_interrupt);
262 sdio_release_host(func);
263
264 if (ret < 0) {
265 dev_err(&func->dev, "can't claim sdio_irq, err(%d)\n", ret);
266 ret = -EIO;
267 }
268 return ret;
269}
270
271static void wilc_sdio_disable_interrupt(struct wilc *dev)
272{
273 struct sdio_func *func = container_of(dev->dev, struct sdio_func, dev);
274 int ret;
275
276 sdio_claim_host(func);
277 ret = sdio_release_irq(func);
278 if (ret < 0)
279 dev_err(&func->dev, "can't release sdio_irq, err(%d)\n", ret);
280 sdio_release_host(func);
281}
282
283/********************************************
284 *
285 * Function 0
286 *
287 ********************************************/
288
289static int wilc_sdio_set_func0_csa_address(struct wilc *wilc, u32 adr)
290{
291 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
292 struct sdio_cmd52 cmd;
293 int ret;
294
295 /**
296 * Review: BIG ENDIAN
297 **/
298 cmd.read_write = 1;
299 cmd.function = 0;
300 cmd.raw = 0;
301 cmd.address = WILC_SDIO_FBR_CSA_REG;
302 cmd.data = (u8)adr;
303 ret = wilc_sdio_cmd52(wilc, &cmd);
304 if (ret) {
305 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
306 cmd.address);
307 return ret;
308 }
309
310 cmd.address = WILC_SDIO_FBR_CSA_REG + 1;
311 cmd.data = (u8)(adr >> 8);
312 ret = wilc_sdio_cmd52(wilc, &cmd);
313 if (ret) {
314 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
315 cmd.address);
316 return ret;
317 }
318
319 cmd.address = WILC_SDIO_FBR_CSA_REG + 2;
320 cmd.data = (u8)(adr >> 16);
321 ret = wilc_sdio_cmd52(wilc, &cmd);
322 if (ret) {
323 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
324 cmd.address);
325 return ret;
326 }
327
328 return 0;
329}
330
331static int wilc_sdio_set_block_size(struct wilc *wilc, u8 func_num,
332 u32 block_size)
333{
334 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
335 struct sdio_cmd52 cmd;
336 int ret;
337
338 cmd.read_write = 1;
339 cmd.function = 0;
340 cmd.raw = 0;
341 cmd.address = SDIO_FBR_BASE(func_num) + SDIO_CCCR_BLKSIZE;
342 cmd.data = (u8)block_size;
343 ret = wilc_sdio_cmd52(wilc, &cmd);
344 if (ret) {
345 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
346 cmd.address);
347 return ret;
348 }
349
350 cmd.address = SDIO_FBR_BASE(func_num) + SDIO_CCCR_BLKSIZE + 1;
351 cmd.data = (u8)(block_size >> 8);
352 ret = wilc_sdio_cmd52(wilc, &cmd);
353 if (ret) {
354 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
355 cmd.address);
356 return ret;
357 }
358
359 return 0;
360}
361
362/********************************************
363 *
364 * Sdio interfaces
365 *
366 ********************************************/
367static int wilc_sdio_write_reg(struct wilc *wilc, u32 addr, u32 data)
368{
369 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
370 struct wilc_sdio *sdio_priv = wilc->bus_data;
371 int ret;
372
373 cpu_to_le32s(&data);
374
375 if (addr >= 0xf0 && addr <= 0xff) { /* only vendor specific registers */
376 struct sdio_cmd52 cmd;
377
378 cmd.read_write = 1;
379 cmd.function = 0;
380 cmd.raw = 0;
381 cmd.address = addr;
382 cmd.data = data;
383 ret = wilc_sdio_cmd52(wilc, &cmd);
384 if (ret)
385 dev_err(&func->dev,
386 "Failed cmd 52, read reg (%08x) ...\n", addr);
387 } else {
388 struct sdio_cmd53 cmd;
389
390 /**
391 * set the AHB address
392 **/
393 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
394 if (ret)
395 return ret;
396
397 cmd.read_write = 1;
398 cmd.function = 0;
399 cmd.address = WILC_SDIO_FBR_DATA_REG;
400 cmd.block_mode = 0;
401 cmd.increment = 1;
402 cmd.count = sizeof(u32);
403 cmd.buffer = (u8 *)&data;
404 cmd.use_global_buf = true;
405 cmd.block_size = sdio_priv->block_size;
406 ret = wilc_sdio_cmd53(wilc, &cmd);
407 if (ret)
408 dev_err(&func->dev,
409 "Failed cmd53, write reg (%08x)...\n", addr);
410 }
411
412 return ret;
413}
414
415static int wilc_sdio_write(struct wilc *wilc, u32 addr, u8 *buf, u32 size)
416{
417 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
418 struct wilc_sdio *sdio_priv = wilc->bus_data;
419 u32 block_size = sdio_priv->block_size;
420 struct sdio_cmd53 cmd;
421 int nblk, nleft, ret;
422
423 cmd.read_write = 1;
424 if (addr > 0) {
425 /**
426 * func 0 access
427 **/
428 cmd.function = 0;
429 cmd.address = WILC_SDIO_FBR_DATA_REG;
430 } else {
431 /**
432 * func 1 access
433 **/
434 cmd.function = 1;
435 cmd.address = WILC_SDIO_F1_DATA_REG;
436 }
437
438 size = ALIGN(size, 4);
439 nblk = size / block_size;
440 nleft = size % block_size;
441
442 cmd.use_global_buf = false;
443 if (nblk > 0) {
444 cmd.block_mode = 1;
445 cmd.increment = 1;
446 cmd.count = nblk;
447 cmd.buffer = buf;
448 cmd.block_size = block_size;
449 if (addr > 0) {
450 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
451 if (ret)
452 return ret;
453 }
454 ret = wilc_sdio_cmd53(wilc, &cmd);
455 if (ret) {
456 dev_err(&func->dev,
457 "Failed cmd53 [%x], block send...\n", addr);
458 return ret;
459 }
460 if (addr > 0)
461 addr += nblk * block_size;
462 buf += nblk * block_size;
463 }
464
465 if (nleft > 0) {
466 cmd.block_mode = 0;
467 cmd.increment = 1;
468 cmd.count = nleft;
469 cmd.buffer = buf;
470
471 cmd.block_size = block_size;
472
473 if (addr > 0) {
474 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
475 if (ret)
476 return ret;
477 }
478 ret = wilc_sdio_cmd53(wilc, &cmd);
479 if (ret) {
480 dev_err(&func->dev,
481 "Failed cmd53 [%x], bytes send...\n", addr);
482 return ret;
483 }
484 }
485
486 return 0;
487}
488
489static int wilc_sdio_read_reg(struct wilc *wilc, u32 addr, u32 *data)
490{
491 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
492 struct wilc_sdio *sdio_priv = wilc->bus_data;
493 int ret;
494
495 if (addr >= 0xf0 && addr <= 0xff) { /* only vendor specific registers */
496 struct sdio_cmd52 cmd;
497
498 cmd.read_write = 0;
499 cmd.function = 0;
500 cmd.raw = 0;
501 cmd.address = addr;
502 ret = wilc_sdio_cmd52(wilc, &cmd);
503 if (ret) {
504 dev_err(&func->dev,
505 "Failed cmd 52, read reg (%08x) ...\n", addr);
506 return ret;
507 }
508 *data = cmd.data;
509 } else {
510 struct sdio_cmd53 cmd;
511
512 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
513 if (ret)
514 return ret;
515
516 cmd.read_write = 0;
517 cmd.function = 0;
518 cmd.address = WILC_SDIO_FBR_DATA_REG;
519 cmd.block_mode = 0;
520 cmd.increment = 1;
521 cmd.count = sizeof(u32);
522 cmd.buffer = (u8 *)data;
523 cmd.use_global_buf = true;
524
525 cmd.block_size = sdio_priv->block_size;
526 ret = wilc_sdio_cmd53(wilc, &cmd);
527 if (ret) {
528 dev_err(&func->dev,
529 "Failed cmd53, read reg (%08x)...\n", addr);
530 return ret;
531 }
532 }
533
534 le32_to_cpus(data);
535 return 0;
536}
537
538static int wilc_sdio_read(struct wilc *wilc, u32 addr, u8 *buf, u32 size)
539{
540 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
541 struct wilc_sdio *sdio_priv = wilc->bus_data;
542 u32 block_size = sdio_priv->block_size;
543 struct sdio_cmd53 cmd;
544 int nblk, nleft, ret;
545
546 cmd.read_write = 0;
547 if (addr > 0) {
548 /**
549 * func 0 access
550 **/
551 cmd.function = 0;
552 cmd.address = WILC_SDIO_FBR_DATA_REG;
553 } else {
554 /**
555 * func 1 access
556 **/
557 cmd.function = 1;
558 cmd.address = WILC_SDIO_F1_DATA_REG;
559 }
560
561 size = ALIGN(size, 4);
562 nblk = size / block_size;
563 nleft = size % block_size;
564
565 cmd.use_global_buf = false;
566 if (nblk > 0) {
567 cmd.block_mode = 1;
568 cmd.increment = 1;
569 cmd.count = nblk;
570 cmd.buffer = buf;
571 cmd.block_size = block_size;
572 if (addr > 0) {
573 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
574 if (ret)
575 return ret;
576 }
577 ret = wilc_sdio_cmd53(wilc, &cmd);
578 if (ret) {
579 dev_err(&func->dev,
580 "Failed cmd53 [%x], block read...\n", addr);
581 return ret;
582 }
583 if (addr > 0)
584 addr += nblk * block_size;
585 buf += nblk * block_size;
586 } /* if (nblk > 0) */
587
588 if (nleft > 0) {
589 cmd.block_mode = 0;
590 cmd.increment = 1;
591 cmd.count = nleft;
592 cmd.buffer = buf;
593
594 cmd.block_size = block_size;
595
596 if (addr > 0) {
597 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
598 if (ret)
599 return ret;
600 }
601 ret = wilc_sdio_cmd53(wilc, &cmd);
602 if (ret) {
603 dev_err(&func->dev,
604 "Failed cmd53 [%x], bytes read...\n", addr);
605 return ret;
606 }
607 }
608
609 return 0;
610}
611
612/********************************************
613 *
614 * Bus interfaces
615 *
616 ********************************************/
617
618static int wilc_sdio_deinit(struct wilc *wilc)
619{
620 struct wilc_sdio *sdio_priv = wilc->bus_data;
621
622 sdio_priv->isinit = false;
623 return 0;
624}
625
626static int wilc_sdio_init(struct wilc *wilc, bool resume)
627{
628 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
629 struct wilc_sdio *sdio_priv = wilc->bus_data;
630 struct sdio_cmd52 cmd;
631 int loop, ret;
632 u32 chipid;
633
634 /**
635 * function 0 csa enable
636 **/
637 cmd.read_write = 1;
638 cmd.function = 0;
639 cmd.raw = 1;
640 cmd.address = SDIO_FBR_BASE(1);
641 cmd.data = SDIO_FBR_ENABLE_CSA;
642 ret = wilc_sdio_cmd52(wilc, &cmd);
643 if (ret) {
644 dev_err(&func->dev, "Fail cmd 52, enable csa...\n");
645 return ret;
646 }
647
648 /**
649 * function 0 block size
650 **/
651 ret = wilc_sdio_set_block_size(wilc, 0, WILC_SDIO_BLOCK_SIZE);
652 if (ret) {
653 dev_err(&func->dev, "Fail cmd 52, set func 0 block size...\n");
654 return ret;
655 }
656 sdio_priv->block_size = WILC_SDIO_BLOCK_SIZE;
657
658 /**
659 * enable func1 IO
660 **/
661 cmd.read_write = 1;
662 cmd.function = 0;
663 cmd.raw = 1;
664 cmd.address = SDIO_CCCR_IOEx;
665 cmd.data = WILC_SDIO_CCCR_IO_EN_FUNC1;
666 ret = wilc_sdio_cmd52(wilc, &cmd);
667 if (ret) {
668 dev_err(&func->dev,
669 "Fail cmd 52, set IOE register...\n");
670 return ret;
671 }
672
673 /**
674 * make sure func 1 is up
675 **/
676 cmd.read_write = 0;
677 cmd.function = 0;
678 cmd.raw = 0;
679 cmd.address = SDIO_CCCR_IORx;
680 loop = 3;
681 do {
682 cmd.data = 0;
683 ret = wilc_sdio_cmd52(wilc, &cmd);
684 if (ret) {
685 dev_err(&func->dev,
686 "Fail cmd 52, get IOR register...\n");
687 return ret;
688 }
689 if (cmd.data == WILC_SDIO_CCCR_IO_EN_FUNC1)
690 break;
691 } while (loop--);
692
693 if (loop <= 0) {
694 dev_err(&func->dev, "Fail func 1 is not ready...\n");
695 return -EINVAL;
696 }
697
698 /**
699 * func 1 is ready, set func 1 block size
700 **/
701 ret = wilc_sdio_set_block_size(wilc, 1, WILC_SDIO_BLOCK_SIZE);
702 if (ret) {
703 dev_err(&func->dev, "Fail set func 1 block size...\n");
704 return ret;
705 }
706
707 /**
708 * func 1 interrupt enable
709 **/
710 cmd.read_write = 1;
711 cmd.function = 0;
712 cmd.raw = 1;
713 cmd.address = SDIO_CCCR_IENx;
714 cmd.data = WILC_SDIO_CCCR_IEN_MASTER | WILC_SDIO_CCCR_IEN_FUNC1;
715 ret = wilc_sdio_cmd52(wilc, &cmd);
716 if (ret) {
717 dev_err(&func->dev, "Fail cmd 52, set IEN register...\n");
718 return ret;
719 }
720
721 /**
722 * make sure can read back chip id correctly
723 **/
724 if (!resume) {
725 ret = wilc_sdio_read_reg(wilc, WILC_CHIPID, &chipid);
726 if (ret) {
727 dev_err(&func->dev, "Fail cmd read chip id...\n");
728 return ret;
729 }
730 dev_err(&func->dev, "chipid (%08x)\n", chipid);
731 }
732
733 sdio_priv->isinit = true;
734 return 0;
735}
736
737static int wilc_sdio_read_size(struct wilc *wilc, u32 *size)
738{
739 u32 tmp;
740 struct sdio_cmd52 cmd;
741
742 /**
743 * Read DMA count in words
744 **/
745 cmd.read_write = 0;
746 cmd.function = 0;
747 cmd.raw = 0;
748 cmd.address = WILC_SDIO_INTERRUPT_DATA_SZ_REG;
749 cmd.data = 0;
750 wilc_sdio_cmd52(wilc, &cmd);
751 tmp = cmd.data;
752
753 cmd.address = WILC_SDIO_INTERRUPT_DATA_SZ_REG + 1;
754 cmd.data = 0;
755 wilc_sdio_cmd52(wilc, &cmd);
756 tmp |= (cmd.data << 8);
757
758 *size = tmp;
759 return 0;
760}
761
762static int wilc_sdio_read_int(struct wilc *wilc, u32 *int_status)
763{
764 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
765 struct wilc_sdio *sdio_priv = wilc->bus_data;
766 u32 tmp;
767 u8 irq_flags;
768 struct sdio_cmd52 cmd;
769
770 wilc_sdio_read_size(wilc, &tmp);
771
772 /**
773 * Read IRQ flags
774 **/
775 if (!sdio_priv->irq_gpio) {
776 cmd.function = 1;
777 cmd.address = WILC_SDIO_EXT_IRQ_FLAG_REG;
778 } else {
779 cmd.function = 0;
780 cmd.address = WILC_SDIO_IRQ_FLAG_REG;
781 }
782 cmd.raw = 0;
783 cmd.read_write = 0;
784 cmd.data = 0;
785 wilc_sdio_cmd52(wilc, &cmd);
786 irq_flags = cmd.data;
787 tmp |= FIELD_PREP(IRG_FLAGS_MASK, cmd.data);
788
789 if (FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags))
790 dev_err(&func->dev, "Unexpected interrupt (1) int=%lx\n",
791 FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags));
792
793 *int_status = tmp;
794
795 return 0;
796}
797
798static int wilc_sdio_clear_int_ext(struct wilc *wilc, u32 val)
799{
800 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
801 struct wilc_sdio *sdio_priv = wilc->bus_data;
802 int ret;
803 u32 reg = 0;
804
805 if (sdio_priv->irq_gpio)
806 reg = val & (BIT(MAX_NUM_INT) - 1);
807
808 /* select VMM table 0 */
809 if (val & SEL_VMM_TBL0)
810 reg |= BIT(5);
811 /* select VMM table 1 */
812 if (val & SEL_VMM_TBL1)
813 reg |= BIT(6);
814 /* enable VMM */
815 if (val & EN_VMM)
816 reg |= BIT(7);
817 if (reg) {
818 struct sdio_cmd52 cmd;
819
820 cmd.read_write = 1;
821 cmd.function = 0;
822 cmd.raw = 0;
823 cmd.address = WILC_SDIO_IRQ_CLEAR_FLAG_REG;
824 cmd.data = reg;
825
826 ret = wilc_sdio_cmd52(wilc, &cmd);
827 if (ret) {
828 dev_err(&func->dev,
829 "Failed cmd52, set (%02x) data (%d) ...\n",
830 cmd.address, __LINE__);
831 return ret;
832 }
833 }
834 return 0;
835}
836
837static int wilc_sdio_sync_ext(struct wilc *wilc, int nint)
838{
839 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
840 struct wilc_sdio *sdio_priv = wilc->bus_data;
841 u32 reg;
842
843 if (nint > MAX_NUM_INT) {
844 dev_err(&func->dev, "Too many interrupts (%d)...\n", nint);
845 return -EINVAL;
846 }
847
848 /**
849 * Disable power sequencer
850 **/
851 if (wilc_sdio_read_reg(wilc, WILC_MISC, ®)) {
852 dev_err(&func->dev, "Failed read misc reg...\n");
853 return -EINVAL;
854 }
855
856 reg &= ~BIT(8);
857 if (wilc_sdio_write_reg(wilc, WILC_MISC, reg)) {
858 dev_err(&func->dev, "Failed write misc reg...\n");
859 return -EINVAL;
860 }
861
862 if (sdio_priv->irq_gpio) {
863 u32 reg;
864 int ret, i;
865
866 /**
867 * interrupt pin mux select
868 **/
869 ret = wilc_sdio_read_reg(wilc, WILC_PIN_MUX_0, ®);
870 if (ret) {
871 dev_err(&func->dev, "Failed read reg (%08x)...\n",
872 WILC_PIN_MUX_0);
873 return ret;
874 }
875 reg |= BIT(8);
876 ret = wilc_sdio_write_reg(wilc, WILC_PIN_MUX_0, reg);
877 if (ret) {
878 dev_err(&func->dev, "Failed write reg (%08x)...\n",
879 WILC_PIN_MUX_0);
880 return ret;
881 }
882
883 /**
884 * interrupt enable
885 **/
886 ret = wilc_sdio_read_reg(wilc, WILC_INTR_ENABLE, ®);
887 if (ret) {
888 dev_err(&func->dev, "Failed read reg (%08x)...\n",
889 WILC_INTR_ENABLE);
890 return ret;
891 }
892
893 for (i = 0; (i < 5) && (nint > 0); i++, nint--)
894 reg |= BIT((27 + i));
895 ret = wilc_sdio_write_reg(wilc, WILC_INTR_ENABLE, reg);
896 if (ret) {
897 dev_err(&func->dev, "Failed write reg (%08x)...\n",
898 WILC_INTR_ENABLE);
899 return ret;
900 }
901 if (nint) {
902 ret = wilc_sdio_read_reg(wilc, WILC_INTR2_ENABLE, ®);
903 if (ret) {
904 dev_err(&func->dev,
905 "Failed read reg (%08x)...\n",
906 WILC_INTR2_ENABLE);
907 return ret;
908 }
909
910 for (i = 0; (i < 3) && (nint > 0); i++, nint--)
911 reg |= BIT(i);
912
913 ret = wilc_sdio_write_reg(wilc, WILC_INTR2_ENABLE, reg);
914 if (ret) {
915 dev_err(&func->dev,
916 "Failed write reg (%08x)...\n",
917 WILC_INTR2_ENABLE);
918 return ret;
919 }
920 }
921 }
922 return 0;
923}
924
925/* Global sdio HIF function table */
926static const struct wilc_hif_func wilc_hif_sdio = {
927 .hif_init = wilc_sdio_init,
928 .hif_deinit = wilc_sdio_deinit,
929 .hif_read_reg = wilc_sdio_read_reg,
930 .hif_write_reg = wilc_sdio_write_reg,
931 .hif_block_rx = wilc_sdio_read,
932 .hif_block_tx = wilc_sdio_write,
933 .hif_read_int = wilc_sdio_read_int,
934 .hif_clear_int_ext = wilc_sdio_clear_int_ext,
935 .hif_read_size = wilc_sdio_read_size,
936 .hif_block_tx_ext = wilc_sdio_write,
937 .hif_block_rx_ext = wilc_sdio_read,
938 .hif_sync_ext = wilc_sdio_sync_ext,
939 .enable_interrupt = wilc_sdio_enable_interrupt,
940 .disable_interrupt = wilc_sdio_disable_interrupt,
941 .hif_reset = wilc_sdio_reset,
942 .hif_is_init = wilc_sdio_is_init,
943};
944
945static int wilc_sdio_resume(struct device *dev)
946{
947 struct sdio_func *func = dev_to_sdio_func(dev);
948 struct wilc *wilc = sdio_get_drvdata(func);
949
950 dev_info(dev, "sdio resume\n");
951 sdio_release_host(func);
952 chip_wakeup(wilc);
953 wilc_sdio_init(wilc, true);
954
955 if (wilc->suspend_event)
956 host_wakeup_notify(wilc);
957
958 chip_allow_sleep(wilc);
959
960 return 0;
961}
962
963static const struct of_device_id wilc_of_match[] = {
964 { .compatible = "microchip,wilc1000", },
965 { /* sentinel */ }
966};
967MODULE_DEVICE_TABLE(of, wilc_of_match);
968
969static const struct dev_pm_ops wilc_sdio_pm_ops = {
970 .suspend = wilc_sdio_suspend,
971 .resume = wilc_sdio_resume,
972};
973
974static struct sdio_driver wilc_sdio_driver = {
975 .name = SDIO_MODALIAS,
976 .id_table = wilc_sdio_ids,
977 .probe = wilc_sdio_probe,
978 .remove = wilc_sdio_remove,
979 .drv = {
980 .pm = &wilc_sdio_pm_ops,
981 .of_match_table = wilc_of_match,
982 }
983};
984module_driver(wilc_sdio_driver,
985 sdio_register_driver,
986 sdio_unregister_driver);
987MODULE_DESCRIPTION("Atmel WILC1000 SDIO wireless driver");
988MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
4 * All rights reserved.
5 */
6
7#include <linux/clk.h>
8#include <linux/mmc/sdio_func.h>
9#include <linux/mmc/sdio_ids.h>
10#include <linux/mmc/host.h>
11#include <linux/mmc/sdio.h>
12#include <linux/of_irq.h>
13
14#include "netdev.h"
15#include "cfg80211.h"
16
17#define SDIO_MODALIAS "wilc1000_sdio"
18
19static const struct sdio_device_id wilc_sdio_ids[] = {
20 { SDIO_DEVICE(SDIO_VENDOR_ID_MICROCHIP_WILC, SDIO_DEVICE_ID_MICROCHIP_WILC1000) },
21 { },
22};
23
24#define WILC_SDIO_BLOCK_SIZE 512
25
26struct wilc_sdio {
27 bool irq_gpio;
28 u32 block_size;
29 int has_thrpt_enh3;
30};
31
32struct sdio_cmd52 {
33 u32 read_write: 1;
34 u32 function: 3;
35 u32 raw: 1;
36 u32 address: 17;
37 u32 data: 8;
38};
39
40struct sdio_cmd53 {
41 u32 read_write: 1;
42 u32 function: 3;
43 u32 block_mode: 1;
44 u32 increment: 1;
45 u32 address: 17;
46 u32 count: 9;
47 u8 *buffer;
48 u32 block_size;
49};
50
51static const struct wilc_hif_func wilc_hif_sdio;
52
53static void wilc_sdio_interrupt(struct sdio_func *func)
54{
55 sdio_release_host(func);
56 wilc_handle_isr(sdio_get_drvdata(func));
57 sdio_claim_host(func);
58}
59
60static int wilc_sdio_cmd52(struct wilc *wilc, struct sdio_cmd52 *cmd)
61{
62 struct sdio_func *func = container_of(wilc->dev, struct sdio_func, dev);
63 int ret;
64 u8 data;
65
66 sdio_claim_host(func);
67
68 func->num = cmd->function;
69 if (cmd->read_write) { /* write */
70 if (cmd->raw) {
71 sdio_writeb(func, cmd->data, cmd->address, &ret);
72 data = sdio_readb(func, cmd->address, &ret);
73 cmd->data = data;
74 } else {
75 sdio_writeb(func, cmd->data, cmd->address, &ret);
76 }
77 } else { /* read */
78 data = sdio_readb(func, cmd->address, &ret);
79 cmd->data = data;
80 }
81
82 sdio_release_host(func);
83
84 if (ret)
85 dev_err(&func->dev, "%s..failed, err(%d)\n", __func__, ret);
86 return ret;
87}
88
89static int wilc_sdio_cmd53(struct wilc *wilc, struct sdio_cmd53 *cmd)
90{
91 struct sdio_func *func = container_of(wilc->dev, struct sdio_func, dev);
92 int size, ret;
93
94 sdio_claim_host(func);
95
96 func->num = cmd->function;
97 func->cur_blksize = cmd->block_size;
98 if (cmd->block_mode)
99 size = cmd->count * cmd->block_size;
100 else
101 size = cmd->count;
102
103 if (cmd->read_write) { /* write */
104 ret = sdio_memcpy_toio(func, cmd->address,
105 (void *)cmd->buffer, size);
106 } else { /* read */
107 ret = sdio_memcpy_fromio(func, (void *)cmd->buffer,
108 cmd->address, size);
109 }
110
111 sdio_release_host(func);
112
113 if (ret)
114 dev_err(&func->dev, "%s..failed, err(%d)\n", __func__, ret);
115
116 return ret;
117}
118
119static int wilc_sdio_probe(struct sdio_func *func,
120 const struct sdio_device_id *id)
121{
122 struct wilc *wilc;
123 int ret;
124 struct wilc_sdio *sdio_priv;
125
126 sdio_priv = kzalloc(sizeof(*sdio_priv), GFP_KERNEL);
127 if (!sdio_priv)
128 return -ENOMEM;
129
130 ret = wilc_cfg80211_init(&wilc, &func->dev, WILC_HIF_SDIO,
131 &wilc_hif_sdio);
132 if (ret) {
133 kfree(sdio_priv);
134 return ret;
135 }
136
137 if (IS_ENABLED(CONFIG_WILC1000_HW_OOB_INTR)) {
138 struct device_node *np = func->card->dev.of_node;
139 int irq_num = of_irq_get(np, 0);
140
141 if (irq_num > 0) {
142 wilc->dev_irq_num = irq_num;
143 sdio_priv->irq_gpio = true;
144 }
145 }
146
147 sdio_set_drvdata(func, wilc);
148 wilc->bus_data = sdio_priv;
149 wilc->dev = &func->dev;
150
151 wilc->rtc_clk = devm_clk_get(&func->card->dev, "rtc");
152 if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -EPROBE_DEFER) {
153 kfree(sdio_priv);
154 return -EPROBE_DEFER;
155 } else if (!IS_ERR(wilc->rtc_clk))
156 clk_prepare_enable(wilc->rtc_clk);
157
158 dev_info(&func->dev, "Driver Initializing success\n");
159 return 0;
160}
161
162static void wilc_sdio_remove(struct sdio_func *func)
163{
164 struct wilc *wilc = sdio_get_drvdata(func);
165
166 if (!IS_ERR(wilc->rtc_clk))
167 clk_disable_unprepare(wilc->rtc_clk);
168
169 wilc_netdev_cleanup(wilc);
170}
171
172static int wilc_sdio_reset(struct wilc *wilc)
173{
174 struct sdio_cmd52 cmd;
175 int ret;
176 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
177
178 cmd.read_write = 1;
179 cmd.function = 0;
180 cmd.raw = 0;
181 cmd.address = SDIO_CCCR_ABORT;
182 cmd.data = WILC_SDIO_CCCR_ABORT_RESET;
183 ret = wilc_sdio_cmd52(wilc, &cmd);
184 if (ret) {
185 dev_err(&func->dev, "Fail cmd 52, reset cmd ...\n");
186 return ret;
187 }
188 return 0;
189}
190
191static int wilc_sdio_suspend(struct device *dev)
192{
193 struct sdio_func *func = dev_to_sdio_func(dev);
194 struct wilc *wilc = sdio_get_drvdata(func);
195 int ret;
196
197 dev_info(dev, "sdio suspend\n");
198 chip_wakeup(wilc);
199
200 if (!IS_ERR(wilc->rtc_clk))
201 clk_disable_unprepare(wilc->rtc_clk);
202
203 if (wilc->suspend_event) {
204 host_sleep_notify(wilc);
205 chip_allow_sleep(wilc);
206 }
207
208 ret = wilc_sdio_reset(wilc);
209 if (ret) {
210 dev_err(&func->dev, "Fail reset sdio\n");
211 return ret;
212 }
213 sdio_claim_host(func);
214
215 return 0;
216}
217
218static int wilc_sdio_enable_interrupt(struct wilc *dev)
219{
220 struct sdio_func *func = container_of(dev->dev, struct sdio_func, dev);
221 int ret = 0;
222
223 sdio_claim_host(func);
224 ret = sdio_claim_irq(func, wilc_sdio_interrupt);
225 sdio_release_host(func);
226
227 if (ret < 0) {
228 dev_err(&func->dev, "can't claim sdio_irq, err(%d)\n", ret);
229 ret = -EIO;
230 }
231 return ret;
232}
233
234static void wilc_sdio_disable_interrupt(struct wilc *dev)
235{
236 struct sdio_func *func = container_of(dev->dev, struct sdio_func, dev);
237 int ret;
238
239 sdio_claim_host(func);
240 ret = sdio_release_irq(func);
241 if (ret < 0)
242 dev_err(&func->dev, "can't release sdio_irq, err(%d)\n", ret);
243 sdio_release_host(func);
244}
245
246/********************************************
247 *
248 * Function 0
249 *
250 ********************************************/
251
252static int wilc_sdio_set_func0_csa_address(struct wilc *wilc, u32 adr)
253{
254 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
255 struct sdio_cmd52 cmd;
256 int ret;
257
258 /**
259 * Review: BIG ENDIAN
260 **/
261 cmd.read_write = 1;
262 cmd.function = 0;
263 cmd.raw = 0;
264 cmd.address = WILC_SDIO_FBR_CSA_REG;
265 cmd.data = (u8)adr;
266 ret = wilc_sdio_cmd52(wilc, &cmd);
267 if (ret) {
268 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
269 cmd.address);
270 return ret;
271 }
272
273 cmd.address = WILC_SDIO_FBR_CSA_REG + 1;
274 cmd.data = (u8)(adr >> 8);
275 ret = wilc_sdio_cmd52(wilc, &cmd);
276 if (ret) {
277 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
278 cmd.address);
279 return ret;
280 }
281
282 cmd.address = WILC_SDIO_FBR_CSA_REG + 2;
283 cmd.data = (u8)(adr >> 16);
284 ret = wilc_sdio_cmd52(wilc, &cmd);
285 if (ret) {
286 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
287 cmd.address);
288 return ret;
289 }
290
291 return 0;
292}
293
294static int wilc_sdio_set_block_size(struct wilc *wilc, u8 func_num,
295 u32 block_size)
296{
297 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
298 struct sdio_cmd52 cmd;
299 int ret;
300
301 cmd.read_write = 1;
302 cmd.function = 0;
303 cmd.raw = 0;
304 cmd.address = SDIO_FBR_BASE(func_num) + SDIO_CCCR_BLKSIZE;
305 cmd.data = (u8)block_size;
306 ret = wilc_sdio_cmd52(wilc, &cmd);
307 if (ret) {
308 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
309 cmd.address);
310 return ret;
311 }
312
313 cmd.address = SDIO_FBR_BASE(func_num) + SDIO_CCCR_BLKSIZE + 1;
314 cmd.data = (u8)(block_size >> 8);
315 ret = wilc_sdio_cmd52(wilc, &cmd);
316 if (ret) {
317 dev_err(&func->dev, "Failed cmd52, set %04x data...\n",
318 cmd.address);
319 return ret;
320 }
321
322 return 0;
323}
324
325/********************************************
326 *
327 * Sdio interfaces
328 *
329 ********************************************/
330static int wilc_sdio_write_reg(struct wilc *wilc, u32 addr, u32 data)
331{
332 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
333 struct wilc_sdio *sdio_priv = wilc->bus_data;
334 int ret;
335
336 cpu_to_le32s(&data);
337
338 if (addr >= 0xf0 && addr <= 0xff) { /* only vendor specific registers */
339 struct sdio_cmd52 cmd;
340
341 cmd.read_write = 1;
342 cmd.function = 0;
343 cmd.raw = 0;
344 cmd.address = addr;
345 cmd.data = data;
346 ret = wilc_sdio_cmd52(wilc, &cmd);
347 if (ret)
348 dev_err(&func->dev,
349 "Failed cmd 52, read reg (%08x) ...\n", addr);
350 } else {
351 struct sdio_cmd53 cmd;
352
353 /**
354 * set the AHB address
355 **/
356 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
357 if (ret)
358 return ret;
359
360 cmd.read_write = 1;
361 cmd.function = 0;
362 cmd.address = WILC_SDIO_FBR_DATA_REG;
363 cmd.block_mode = 0;
364 cmd.increment = 1;
365 cmd.count = 4;
366 cmd.buffer = (u8 *)&data;
367 cmd.block_size = sdio_priv->block_size;
368 ret = wilc_sdio_cmd53(wilc, &cmd);
369 if (ret)
370 dev_err(&func->dev,
371 "Failed cmd53, write reg (%08x)...\n", addr);
372 }
373
374 return ret;
375}
376
377static int wilc_sdio_write(struct wilc *wilc, u32 addr, u8 *buf, u32 size)
378{
379 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
380 struct wilc_sdio *sdio_priv = wilc->bus_data;
381 u32 block_size = sdio_priv->block_size;
382 struct sdio_cmd53 cmd;
383 int nblk, nleft, ret;
384
385 cmd.read_write = 1;
386 if (addr > 0) {
387 /**
388 * func 0 access
389 **/
390 cmd.function = 0;
391 cmd.address = WILC_SDIO_FBR_DATA_REG;
392 } else {
393 /**
394 * func 1 access
395 **/
396 cmd.function = 1;
397 cmd.address = WILC_SDIO_F1_DATA_REG;
398 }
399
400 size = ALIGN(size, 4);
401 nblk = size / block_size;
402 nleft = size % block_size;
403
404 if (nblk > 0) {
405 cmd.block_mode = 1;
406 cmd.increment = 1;
407 cmd.count = nblk;
408 cmd.buffer = buf;
409 cmd.block_size = block_size;
410 if (addr > 0) {
411 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
412 if (ret)
413 return ret;
414 }
415 ret = wilc_sdio_cmd53(wilc, &cmd);
416 if (ret) {
417 dev_err(&func->dev,
418 "Failed cmd53 [%x], block send...\n", addr);
419 return ret;
420 }
421 if (addr > 0)
422 addr += nblk * block_size;
423 buf += nblk * block_size;
424 }
425
426 if (nleft > 0) {
427 cmd.block_mode = 0;
428 cmd.increment = 1;
429 cmd.count = nleft;
430 cmd.buffer = buf;
431
432 cmd.block_size = block_size;
433
434 if (addr > 0) {
435 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
436 if (ret)
437 return ret;
438 }
439 ret = wilc_sdio_cmd53(wilc, &cmd);
440 if (ret) {
441 dev_err(&func->dev,
442 "Failed cmd53 [%x], bytes send...\n", addr);
443 return ret;
444 }
445 }
446
447 return 0;
448}
449
450static int wilc_sdio_read_reg(struct wilc *wilc, u32 addr, u32 *data)
451{
452 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
453 struct wilc_sdio *sdio_priv = wilc->bus_data;
454 int ret;
455
456 if (addr >= 0xf0 && addr <= 0xff) { /* only vendor specific registers */
457 struct sdio_cmd52 cmd;
458
459 cmd.read_write = 0;
460 cmd.function = 0;
461 cmd.raw = 0;
462 cmd.address = addr;
463 ret = wilc_sdio_cmd52(wilc, &cmd);
464 if (ret) {
465 dev_err(&func->dev,
466 "Failed cmd 52, read reg (%08x) ...\n", addr);
467 return ret;
468 }
469 *data = cmd.data;
470 } else {
471 struct sdio_cmd53 cmd;
472
473 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
474 if (ret)
475 return ret;
476
477 cmd.read_write = 0;
478 cmd.function = 0;
479 cmd.address = WILC_SDIO_FBR_DATA_REG;
480 cmd.block_mode = 0;
481 cmd.increment = 1;
482 cmd.count = 4;
483 cmd.buffer = (u8 *)data;
484
485 cmd.block_size = sdio_priv->block_size;
486 ret = wilc_sdio_cmd53(wilc, &cmd);
487 if (ret) {
488 dev_err(&func->dev,
489 "Failed cmd53, read reg (%08x)...\n", addr);
490 return ret;
491 }
492 }
493
494 le32_to_cpus(data);
495 return 0;
496}
497
498static int wilc_sdio_read(struct wilc *wilc, u32 addr, u8 *buf, u32 size)
499{
500 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
501 struct wilc_sdio *sdio_priv = wilc->bus_data;
502 u32 block_size = sdio_priv->block_size;
503 struct sdio_cmd53 cmd;
504 int nblk, nleft, ret;
505
506 cmd.read_write = 0;
507 if (addr > 0) {
508 /**
509 * func 0 access
510 **/
511 cmd.function = 0;
512 cmd.address = WILC_SDIO_FBR_DATA_REG;
513 } else {
514 /**
515 * func 1 access
516 **/
517 cmd.function = 1;
518 cmd.address = WILC_SDIO_F1_DATA_REG;
519 }
520
521 size = ALIGN(size, 4);
522 nblk = size / block_size;
523 nleft = size % block_size;
524
525 if (nblk > 0) {
526 cmd.block_mode = 1;
527 cmd.increment = 1;
528 cmd.count = nblk;
529 cmd.buffer = buf;
530 cmd.block_size = block_size;
531 if (addr > 0) {
532 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
533 if (ret)
534 return ret;
535 }
536 ret = wilc_sdio_cmd53(wilc, &cmd);
537 if (ret) {
538 dev_err(&func->dev,
539 "Failed cmd53 [%x], block read...\n", addr);
540 return ret;
541 }
542 if (addr > 0)
543 addr += nblk * block_size;
544 buf += nblk * block_size;
545 } /* if (nblk > 0) */
546
547 if (nleft > 0) {
548 cmd.block_mode = 0;
549 cmd.increment = 1;
550 cmd.count = nleft;
551 cmd.buffer = buf;
552
553 cmd.block_size = block_size;
554
555 if (addr > 0) {
556 ret = wilc_sdio_set_func0_csa_address(wilc, addr);
557 if (ret)
558 return ret;
559 }
560 ret = wilc_sdio_cmd53(wilc, &cmd);
561 if (ret) {
562 dev_err(&func->dev,
563 "Failed cmd53 [%x], bytes read...\n", addr);
564 return ret;
565 }
566 }
567
568 return 0;
569}
570
571/********************************************
572 *
573 * Bus interfaces
574 *
575 ********************************************/
576
577static int wilc_sdio_deinit(struct wilc *wilc)
578{
579 return 0;
580}
581
582static int wilc_sdio_init(struct wilc *wilc, bool resume)
583{
584 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
585 struct wilc_sdio *sdio_priv = wilc->bus_data;
586 struct sdio_cmd52 cmd;
587 int loop, ret;
588 u32 chipid;
589
590 /**
591 * function 0 csa enable
592 **/
593 cmd.read_write = 1;
594 cmd.function = 0;
595 cmd.raw = 1;
596 cmd.address = SDIO_FBR_BASE(func->num);
597 cmd.data = SDIO_FBR_ENABLE_CSA;
598 ret = wilc_sdio_cmd52(wilc, &cmd);
599 if (ret) {
600 dev_err(&func->dev, "Fail cmd 52, enable csa...\n");
601 return ret;
602 }
603
604 /**
605 * function 0 block size
606 **/
607 ret = wilc_sdio_set_block_size(wilc, 0, WILC_SDIO_BLOCK_SIZE);
608 if (ret) {
609 dev_err(&func->dev, "Fail cmd 52, set func 0 block size...\n");
610 return ret;
611 }
612 sdio_priv->block_size = WILC_SDIO_BLOCK_SIZE;
613
614 /**
615 * enable func1 IO
616 **/
617 cmd.read_write = 1;
618 cmd.function = 0;
619 cmd.raw = 1;
620 cmd.address = SDIO_CCCR_IOEx;
621 cmd.data = WILC_SDIO_CCCR_IO_EN_FUNC1;
622 ret = wilc_sdio_cmd52(wilc, &cmd);
623 if (ret) {
624 dev_err(&func->dev,
625 "Fail cmd 52, set IOE register...\n");
626 return ret;
627 }
628
629 /**
630 * make sure func 1 is up
631 **/
632 cmd.read_write = 0;
633 cmd.function = 0;
634 cmd.raw = 0;
635 cmd.address = SDIO_CCCR_IORx;
636 loop = 3;
637 do {
638 cmd.data = 0;
639 ret = wilc_sdio_cmd52(wilc, &cmd);
640 if (ret) {
641 dev_err(&func->dev,
642 "Fail cmd 52, get IOR register...\n");
643 return ret;
644 }
645 if (cmd.data == WILC_SDIO_CCCR_IO_EN_FUNC1)
646 break;
647 } while (loop--);
648
649 if (loop <= 0) {
650 dev_err(&func->dev, "Fail func 1 is not ready...\n");
651 return -EINVAL;
652 }
653
654 /**
655 * func 1 is ready, set func 1 block size
656 **/
657 ret = wilc_sdio_set_block_size(wilc, 1, WILC_SDIO_BLOCK_SIZE);
658 if (ret) {
659 dev_err(&func->dev, "Fail set func 1 block size...\n");
660 return ret;
661 }
662
663 /**
664 * func 1 interrupt enable
665 **/
666 cmd.read_write = 1;
667 cmd.function = 0;
668 cmd.raw = 1;
669 cmd.address = SDIO_CCCR_IENx;
670 cmd.data = WILC_SDIO_CCCR_IEN_MASTER | WILC_SDIO_CCCR_IEN_FUNC1;
671 ret = wilc_sdio_cmd52(wilc, &cmd);
672 if (ret) {
673 dev_err(&func->dev, "Fail cmd 52, set IEN register...\n");
674 return ret;
675 }
676
677 /**
678 * make sure can read back chip id correctly
679 **/
680 if (!resume) {
681 int rev;
682
683 ret = wilc_sdio_read_reg(wilc, WILC_CHIPID, &chipid);
684 if (ret) {
685 dev_err(&func->dev, "Fail cmd read chip id...\n");
686 return ret;
687 }
688 dev_err(&func->dev, "chipid (%08x)\n", chipid);
689 rev = FIELD_GET(WILC_CHIP_REV_FIELD, chipid);
690 if (rev > FIELD_GET(WILC_CHIP_REV_FIELD, WILC_1000_BASE_ID_2A))
691 sdio_priv->has_thrpt_enh3 = 1;
692 else
693 sdio_priv->has_thrpt_enh3 = 0;
694 dev_info(&func->dev, "has_thrpt_enh3 = %d...\n",
695 sdio_priv->has_thrpt_enh3);
696 }
697
698 return 0;
699}
700
701static int wilc_sdio_read_size(struct wilc *wilc, u32 *size)
702{
703 u32 tmp;
704 struct sdio_cmd52 cmd;
705
706 /**
707 * Read DMA count in words
708 **/
709 cmd.read_write = 0;
710 cmd.function = 0;
711 cmd.raw = 0;
712 cmd.address = WILC_SDIO_INTERRUPT_DATA_SZ_REG;
713 cmd.data = 0;
714 wilc_sdio_cmd52(wilc, &cmd);
715 tmp = cmd.data;
716
717 cmd.address = WILC_SDIO_INTERRUPT_DATA_SZ_REG + 1;
718 cmd.data = 0;
719 wilc_sdio_cmd52(wilc, &cmd);
720 tmp |= (cmd.data << 8);
721
722 *size = tmp;
723 return 0;
724}
725
726static int wilc_sdio_read_int(struct wilc *wilc, u32 *int_status)
727{
728 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
729 struct wilc_sdio *sdio_priv = wilc->bus_data;
730 u32 tmp;
731 u8 irq_flags;
732 struct sdio_cmd52 cmd;
733
734 wilc_sdio_read_size(wilc, &tmp);
735
736 /**
737 * Read IRQ flags
738 **/
739 if (!sdio_priv->irq_gpio) {
740 cmd.function = 1;
741 cmd.address = WILC_SDIO_EXT_IRQ_FLAG_REG;
742 } else {
743 cmd.function = 0;
744 cmd.address = WILC_SDIO_IRQ_FLAG_REG;
745 }
746 cmd.raw = 0;
747 cmd.read_write = 0;
748 cmd.data = 0;
749 wilc_sdio_cmd52(wilc, &cmd);
750 irq_flags = cmd.data;
751 tmp |= FIELD_PREP(IRG_FLAGS_MASK, cmd.data);
752
753 if (FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags))
754 dev_err(&func->dev, "Unexpected interrupt (1) int=%lx\n",
755 FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags));
756
757 *int_status = tmp;
758
759 return 0;
760}
761
762static int wilc_sdio_clear_int_ext(struct wilc *wilc, u32 val)
763{
764 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
765 struct wilc_sdio *sdio_priv = wilc->bus_data;
766 int ret;
767 int vmm_ctl;
768
769 if (sdio_priv->has_thrpt_enh3) {
770 u32 reg = 0;
771
772 if (sdio_priv->irq_gpio)
773 reg = val & (BIT(MAX_NUM_INT) - 1);
774
775 /* select VMM table 0 */
776 if (val & SEL_VMM_TBL0)
777 reg |= BIT(5);
778 /* select VMM table 1 */
779 if (val & SEL_VMM_TBL1)
780 reg |= BIT(6);
781 /* enable VMM */
782 if (val & EN_VMM)
783 reg |= BIT(7);
784 if (reg) {
785 struct sdio_cmd52 cmd;
786
787 cmd.read_write = 1;
788 cmd.function = 0;
789 cmd.raw = 0;
790 cmd.address = WILC_SDIO_IRQ_CLEAR_FLAG_REG;
791 cmd.data = reg;
792
793 ret = wilc_sdio_cmd52(wilc, &cmd);
794 if (ret) {
795 dev_err(&func->dev,
796 "Failed cmd52, set (%02x) data (%d) ...\n",
797 cmd.address, __LINE__);
798 return ret;
799 }
800 }
801 return 0;
802 }
803 if (sdio_priv->irq_gpio) {
804 /* has_thrpt_enh2 uses register 0xf8 to clear interrupts. */
805 /*
806 * Cannot clear multiple interrupts.
807 * Must clear each interrupt individually.
808 */
809 u32 flags;
810 int i;
811
812 flags = val & (BIT(MAX_NUM_INT) - 1);
813 for (i = 0; i < NUM_INT_EXT && flags; i++) {
814 if (flags & BIT(i)) {
815 struct sdio_cmd52 cmd;
816
817 cmd.read_write = 1;
818 cmd.function = 0;
819 cmd.raw = 0;
820 cmd.address = WILC_SDIO_IRQ_CLEAR_FLAG_REG;
821 cmd.data = BIT(i);
822
823 ret = wilc_sdio_cmd52(wilc, &cmd);
824 if (ret) {
825 dev_err(&func->dev,
826 "Failed cmd52, set (%02x) data (%d) ...\n",
827 cmd.address, __LINE__);
828 return ret;
829 }
830 flags &= ~BIT(i);
831 }
832 }
833
834 for (i = NUM_INT_EXT; i < MAX_NUM_INT && flags; i++) {
835 if (flags & BIT(i)) {
836 dev_err(&func->dev,
837 "Unexpected interrupt cleared %d...\n",
838 i);
839 flags &= ~BIT(i);
840 }
841 }
842 }
843
844 vmm_ctl = 0;
845 /* select VMM table 0 */
846 if (val & SEL_VMM_TBL0)
847 vmm_ctl |= BIT(0);
848 /* select VMM table 1 */
849 if (val & SEL_VMM_TBL1)
850 vmm_ctl |= BIT(1);
851 /* enable VMM */
852 if (val & EN_VMM)
853 vmm_ctl |= BIT(2);
854
855 if (vmm_ctl) {
856 struct sdio_cmd52 cmd;
857
858 cmd.read_write = 1;
859 cmd.function = 0;
860 cmd.raw = 0;
861 cmd.address = WILC_SDIO_VMM_TBL_CTRL_REG;
862 cmd.data = vmm_ctl;
863 ret = wilc_sdio_cmd52(wilc, &cmd);
864 if (ret) {
865 dev_err(&func->dev,
866 "Failed cmd52, set (%02x) data (%d) ...\n",
867 cmd.address, __LINE__);
868 return ret;
869 }
870 }
871 return 0;
872}
873
874static int wilc_sdio_sync_ext(struct wilc *wilc, int nint)
875{
876 struct sdio_func *func = dev_to_sdio_func(wilc->dev);
877 struct wilc_sdio *sdio_priv = wilc->bus_data;
878 u32 reg;
879
880 if (nint > MAX_NUM_INT) {
881 dev_err(&func->dev, "Too many interrupts (%d)...\n", nint);
882 return -EINVAL;
883 }
884
885 /**
886 * Disable power sequencer
887 **/
888 if (wilc_sdio_read_reg(wilc, WILC_MISC, ®)) {
889 dev_err(&func->dev, "Failed read misc reg...\n");
890 return -EINVAL;
891 }
892
893 reg &= ~BIT(8);
894 if (wilc_sdio_write_reg(wilc, WILC_MISC, reg)) {
895 dev_err(&func->dev, "Failed write misc reg...\n");
896 return -EINVAL;
897 }
898
899 if (sdio_priv->irq_gpio) {
900 u32 reg;
901 int ret, i;
902
903 /**
904 * interrupt pin mux select
905 **/
906 ret = wilc_sdio_read_reg(wilc, WILC_PIN_MUX_0, ®);
907 if (ret) {
908 dev_err(&func->dev, "Failed read reg (%08x)...\n",
909 WILC_PIN_MUX_0);
910 return ret;
911 }
912 reg |= BIT(8);
913 ret = wilc_sdio_write_reg(wilc, WILC_PIN_MUX_0, reg);
914 if (ret) {
915 dev_err(&func->dev, "Failed write reg (%08x)...\n",
916 WILC_PIN_MUX_0);
917 return ret;
918 }
919
920 /**
921 * interrupt enable
922 **/
923 ret = wilc_sdio_read_reg(wilc, WILC_INTR_ENABLE, ®);
924 if (ret) {
925 dev_err(&func->dev, "Failed read reg (%08x)...\n",
926 WILC_INTR_ENABLE);
927 return ret;
928 }
929
930 for (i = 0; (i < 5) && (nint > 0); i++, nint--)
931 reg |= BIT((27 + i));
932 ret = wilc_sdio_write_reg(wilc, WILC_INTR_ENABLE, reg);
933 if (ret) {
934 dev_err(&func->dev, "Failed write reg (%08x)...\n",
935 WILC_INTR_ENABLE);
936 return ret;
937 }
938 if (nint) {
939 ret = wilc_sdio_read_reg(wilc, WILC_INTR2_ENABLE, ®);
940 if (ret) {
941 dev_err(&func->dev,
942 "Failed read reg (%08x)...\n",
943 WILC_INTR2_ENABLE);
944 return ret;
945 }
946
947 for (i = 0; (i < 3) && (nint > 0); i++, nint--)
948 reg |= BIT(i);
949
950 ret = wilc_sdio_write_reg(wilc, WILC_INTR2_ENABLE, reg);
951 if (ret) {
952 dev_err(&func->dev,
953 "Failed write reg (%08x)...\n",
954 WILC_INTR2_ENABLE);
955 return ret;
956 }
957 }
958 }
959 return 0;
960}
961
962/* Global sdio HIF function table */
963static const struct wilc_hif_func wilc_hif_sdio = {
964 .hif_init = wilc_sdio_init,
965 .hif_deinit = wilc_sdio_deinit,
966 .hif_read_reg = wilc_sdio_read_reg,
967 .hif_write_reg = wilc_sdio_write_reg,
968 .hif_block_rx = wilc_sdio_read,
969 .hif_block_tx = wilc_sdio_write,
970 .hif_read_int = wilc_sdio_read_int,
971 .hif_clear_int_ext = wilc_sdio_clear_int_ext,
972 .hif_read_size = wilc_sdio_read_size,
973 .hif_block_tx_ext = wilc_sdio_write,
974 .hif_block_rx_ext = wilc_sdio_read,
975 .hif_sync_ext = wilc_sdio_sync_ext,
976 .enable_interrupt = wilc_sdio_enable_interrupt,
977 .disable_interrupt = wilc_sdio_disable_interrupt,
978};
979
980static int wilc_sdio_resume(struct device *dev)
981{
982 struct sdio_func *func = dev_to_sdio_func(dev);
983 struct wilc *wilc = sdio_get_drvdata(func);
984
985 dev_info(dev, "sdio resume\n");
986 sdio_release_host(func);
987 chip_wakeup(wilc);
988 wilc_sdio_init(wilc, true);
989
990 if (wilc->suspend_event)
991 host_wakeup_notify(wilc);
992
993 chip_allow_sleep(wilc);
994
995 return 0;
996}
997
998static const struct of_device_id wilc_of_match[] = {
999 { .compatible = "microchip,wilc1000", },
1000 { /* sentinel */ }
1001};
1002MODULE_DEVICE_TABLE(of, wilc_of_match);
1003
1004static const struct dev_pm_ops wilc_sdio_pm_ops = {
1005 .suspend = wilc_sdio_suspend,
1006 .resume = wilc_sdio_resume,
1007};
1008
1009static struct sdio_driver wilc_sdio_driver = {
1010 .name = SDIO_MODALIAS,
1011 .id_table = wilc_sdio_ids,
1012 .probe = wilc_sdio_probe,
1013 .remove = wilc_sdio_remove,
1014 .drv = {
1015 .pm = &wilc_sdio_pm_ops,
1016 .of_match_table = wilc_of_match,
1017 }
1018};
1019module_driver(wilc_sdio_driver,
1020 sdio_register_driver,
1021 sdio_unregister_driver);
1022MODULE_LICENSE("GPL");