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Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
[linux-2.6.git] / drivers / mfd / rtsx_pcr.c
blobdd186c4103c1e4f6ad9dc690879fa161489a8b2c
1 /* Driver for Realtek PCI-Express card reader
2 *
3 * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2, or (at your option) any
8 * later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 * Author:
19 * Wei WANG <wei_wang@realsil.com.cn>
20 * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
21 */
22
23 #include <linux/pci.h>
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/highmem.h>
28 #include <linux/interrupt.h>
29 #include <linux/delay.h>
30 #include <linux/idr.h>
31 #include <linux/platform_device.h>
32 #include <linux/mfd/core.h>
33 #include <linux/mfd/rtsx_pci.h>
34 #include <asm/unaligned.h>
35
36 #include "rtsx_pcr.h"
37
38 static bool msi_en = true;
39 module_param(msi_en, bool, S_IRUGO | S_IWUSR);
40 MODULE_PARM_DESC(msi_en, "Enable MSI");
41
42 static DEFINE_IDR(rtsx_pci_idr);
43 static DEFINE_SPINLOCK(rtsx_pci_lock);
44
45 static struct mfd_cell rtsx_pcr_cells[] = {
46 [RTSX_SD_CARD] = {
47 .name = DRV_NAME_RTSX_PCI_SDMMC,
48 },
49 [RTSX_MS_CARD] = {
50 .name = DRV_NAME_RTSX_PCI_MS,
51 },
52 };
53
54 static DEFINE_PCI_DEVICE_TABLE(rtsx_pci_ids) = {
55 { PCI_DEVICE(0x10EC, 0x5209), PCI_CLASS_OTHERS << 16, 0xFF0000 },
56 { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
57 { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
58 { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
59 { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
60 { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
61 { 0, }
62 };
63
64 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
65
66 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
67 {
68 /* If pci device removed, don't queue idle work any more */
69 if (pcr->remove_pci)
70 return;
71
72 if (pcr->state != PDEV_STAT_RUN) {
73 pcr->state = PDEV_STAT_RUN;
74 if (pcr->ops->enable_auto_blink)
75 pcr->ops->enable_auto_blink(pcr);
76 }
77
78 mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
79 }
80 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
81
82 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
83 {
84 int i;
85 u32 val = HAIMR_WRITE_START;
86
87 val |= (u32)(addr & 0x3FFF) << 16;
88 val |= (u32)mask << 8;
89 val |= (u32)data;
90
91 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
92
93 for (i = 0; i < MAX_RW_REG_CNT; i++) {
94 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
95 if ((val & HAIMR_TRANS_END) == 0) {
96 if (data != (u8)val)
97 return -EIO;
98 return 0;
99 }
100 }
101
102 return -ETIMEDOUT;
103 }
104 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
105
106 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
107 {
108 u32 val = HAIMR_READ_START;
109 int i;
110
111 val |= (u32)(addr & 0x3FFF) << 16;
112 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
113
114 for (i = 0; i < MAX_RW_REG_CNT; i++) {
115 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
116 if ((val & HAIMR_TRANS_END) == 0)
117 break;
118 }
119
120 if (i >= MAX_RW_REG_CNT)
121 return -ETIMEDOUT;
122
123 if (data)
124 *data = (u8)(val & 0xFF);
125
126 return 0;
127 }
128 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
129
130 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
131 {
132 int err, i, finished = 0;
133 u8 tmp;
134
135 rtsx_pci_init_cmd(pcr);
136
137 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
138 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
139 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
140 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
141
142 err = rtsx_pci_send_cmd(pcr, 100);
143 if (err < 0)
144 return err;
145
146 for (i = 0; i < 100000; i++) {
147 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
148 if (err < 0)
149 return err;
150
151 if (!(tmp & 0x80)) {
152 finished = 1;
153 break;
154 }
155 }
156
157 if (!finished)
158 return -ETIMEDOUT;
159
160 return 0;
161 }
162 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
163
164 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
165 {
166 int err, i, finished = 0;
167 u16 data;
168 u8 *ptr, tmp;
169
170 rtsx_pci_init_cmd(pcr);
171
172 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
173 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
174
175 err = rtsx_pci_send_cmd(pcr, 100);
176 if (err < 0)
177 return err;
178
179 for (i = 0; i < 100000; i++) {
180 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
181 if (err < 0)
182 return err;
183
184 if (!(tmp & 0x80)) {
185 finished = 1;
186 break;
187 }
188 }
189
190 if (!finished)
191 return -ETIMEDOUT;
192
193 rtsx_pci_init_cmd(pcr);
194
195 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
196 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
197
198 err = rtsx_pci_send_cmd(pcr, 100);
199 if (err < 0)
200 return err;
201
202 ptr = rtsx_pci_get_cmd_data(pcr);
203 data = ((u16)ptr[1] << 8) | ptr[0];
204
205 if (val)
206 *val = data;
207
208 return 0;
209 }
210 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
211
212 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
213 {
214 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
215 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
216
217 rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
218 rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
219 }
220 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
221
222 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
223 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
224 {
225 unsigned long flags;
226 u32 val = 0;
227 u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
228
229 val |= (u32)(cmd_type & 0x03) << 30;
230 val |= (u32)(reg_addr & 0x3FFF) << 16;
231 val |= (u32)mask << 8;
232 val |= (u32)data;
233
234 spin_lock_irqsave(&pcr->lock, flags);
235 ptr += pcr->ci;
236 if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
237 put_unaligned_le32(val, ptr);
238 ptr++;
239 pcr->ci++;
240 }
241 spin_unlock_irqrestore(&pcr->lock, flags);
242 }
243 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
244
245 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
246 {
247 u32 val = 1 << 31;
248
249 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
250
251 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
252 /* Hardware Auto Response */
253 val |= 0x40000000;
254 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
255 }
256 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
257
258 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
259 {
260 struct completion trans_done;
261 u32 val = 1 << 31;
262 long timeleft;
263 unsigned long flags;
264 int err = 0;
265
266 spin_lock_irqsave(&pcr->lock, flags);
267
268 /* set up data structures for the wakeup system */
269 pcr->done = &trans_done;
270 pcr->trans_result = TRANS_NOT_READY;
271 init_completion(&trans_done);
272
273 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
274
275 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
276 /* Hardware Auto Response */
277 val |= 0x40000000;
278 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
279
280 spin_unlock_irqrestore(&pcr->lock, flags);
281
282 /* Wait for TRANS_OK_INT */
283 timeleft = wait_for_completion_interruptible_timeout(
284 &trans_done, msecs_to_jiffies(timeout));
285 if (timeleft <= 0) {
286 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
287 __func__, __LINE__);
288 err = -ETIMEDOUT;
289 goto finish_send_cmd;
290 }
291
292 spin_lock_irqsave(&pcr->lock, flags);
293 if (pcr->trans_result == TRANS_RESULT_FAIL)
294 err = -EINVAL;
295 else if (pcr->trans_result == TRANS_RESULT_OK)
296 err = 0;
297 else if (pcr->trans_result == TRANS_NO_DEVICE)
298 err = -ENODEV;
299 spin_unlock_irqrestore(&pcr->lock, flags);
300
301 finish_send_cmd:
302 spin_lock_irqsave(&pcr->lock, flags);
303 pcr->done = NULL;
304 spin_unlock_irqrestore(&pcr->lock, flags);
305
306 if ((err < 0) && (err != -ENODEV))
307 rtsx_pci_stop_cmd(pcr);
308
309 if (pcr->finish_me)
310 complete(pcr->finish_me);
311
312 return err;
313 }
314 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
315
316 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
317 dma_addr_t addr, unsigned int len, int end)
318 {
319 u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
320 u64 val;
321 u8 option = SG_VALID | SG_TRANS_DATA;
322
323 dev_dbg(&(pcr->pci->dev), "DMA addr: 0x%x, Len: 0x%x\n",
324 (unsigned int)addr, len);
325
326 if (end)
327 option |= SG_END;
328 val = ((u64)addr << 32) | ((u64)len << 12) | option;
329
330 put_unaligned_le64(val, ptr);
331 pcr->sgi++;
332 }
333
334 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
335 int num_sg, bool read, int timeout)
336 {
337 struct completion trans_done;
338 u8 dir;
339 int err = 0, i, count;
340 long timeleft;
341 unsigned long flags;
342 struct scatterlist *sg;
343 enum dma_data_direction dma_dir;
344 u32 val;
345 dma_addr_t addr;
346 unsigned int len;
347
348 dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
349
350 /* don't transfer data during abort processing */
351 if (pcr->remove_pci)
352 return -EINVAL;
353
354 if ((sglist == NULL) || (num_sg <= 0))
355 return -EINVAL;
356
357 if (read) {
358 dir = DEVICE_TO_HOST;
359 dma_dir = DMA_FROM_DEVICE;
360 } else {
361 dir = HOST_TO_DEVICE;
362 dma_dir = DMA_TO_DEVICE;
363 }
364
365 count = dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
366 if (count < 1) {
367 dev_err(&(pcr->pci->dev), "scatterlist map failed\n");
368 return -EINVAL;
369 }
370 dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
371
372 val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
373 pcr->sgi = 0;
374 for_each_sg(sglist, sg, count, i) {
375 addr = sg_dma_address(sg);
376 len = sg_dma_len(sg);
377 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
378 }
379
380 spin_lock_irqsave(&pcr->lock, flags);
381
382 pcr->done = &trans_done;
383 pcr->trans_result = TRANS_NOT_READY;
384 init_completion(&trans_done);
385 rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
386 rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
387
388 spin_unlock_irqrestore(&pcr->lock, flags);
389
390 timeleft = wait_for_completion_interruptible_timeout(
391 &trans_done, msecs_to_jiffies(timeout));
392 if (timeleft <= 0) {
393 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
394 __func__, __LINE__);
395 err = -ETIMEDOUT;
396 goto out;
397 }
398
399 spin_lock_irqsave(&pcr->lock, flags);
400
401 if (pcr->trans_result == TRANS_RESULT_FAIL)
402 err = -EINVAL;
403 else if (pcr->trans_result == TRANS_NO_DEVICE)
404 err = -ENODEV;
405
406 spin_unlock_irqrestore(&pcr->lock, flags);
407
408 out:
409 spin_lock_irqsave(&pcr->lock, flags);
410 pcr->done = NULL;
411 spin_unlock_irqrestore(&pcr->lock, flags);
412
413 dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
414
415 if ((err < 0) && (err != -ENODEV))
416 rtsx_pci_stop_cmd(pcr);
417
418 if (pcr->finish_me)
419 complete(pcr->finish_me);
420
421 return err;
422 }
423 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
424
425 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
426 {
427 int err;
428 int i, j;
429 u16 reg;
430 u8 *ptr;
431
432 if (buf_len > 512)
433 buf_len = 512;
434
435 ptr = buf;
436 reg = PPBUF_BASE2;
437 for (i = 0; i < buf_len / 256; i++) {
438 rtsx_pci_init_cmd(pcr);
439
440 for (j = 0; j < 256; j++)
441 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
442
443 err = rtsx_pci_send_cmd(pcr, 250);
444 if (err < 0)
445 return err;
446
447 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
448 ptr += 256;
449 }
450
451 if (buf_len % 256) {
452 rtsx_pci_init_cmd(pcr);
453
454 for (j = 0; j < buf_len % 256; j++)
455 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
456
457 err = rtsx_pci_send_cmd(pcr, 250);
458 if (err < 0)
459 return err;
460 }
461
462 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
463
464 return 0;
465 }
466 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
467
468 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
469 {
470 int err;
471 int i, j;
472 u16 reg;
473 u8 *ptr;
474
475 if (buf_len > 512)
476 buf_len = 512;
477
478 ptr = buf;
479 reg = PPBUF_BASE2;
480 for (i = 0; i < buf_len / 256; i++) {
481 rtsx_pci_init_cmd(pcr);
482
483 for (j = 0; j < 256; j++) {
484 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
485 reg++, 0xFF, *ptr);
486 ptr++;
487 }
488
489 err = rtsx_pci_send_cmd(pcr, 250);
490 if (err < 0)
491 return err;
492 }
493
494 if (buf_len % 256) {
495 rtsx_pci_init_cmd(pcr);
496
497 for (j = 0; j < buf_len % 256; j++) {
498 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
499 reg++, 0xFF, *ptr);
500 ptr++;
501 }
502
503 err = rtsx_pci_send_cmd(pcr, 250);
504 if (err < 0)
505 return err;
506 }
507
508 return 0;
509 }
510 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
511
512 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
513 {
514 int err;
515
516 rtsx_pci_init_cmd(pcr);
517
518 while (*tbl & 0xFFFF0000) {
519 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
520 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
521 tbl++;
522 }
523
524 err = rtsx_pci_send_cmd(pcr, 100);
525 if (err < 0)
526 return err;
527
528 return 0;
529 }
530
531 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
532 {
533 const u32 *tbl;
534
535 if (card == RTSX_SD_CARD)
536 tbl = pcr->sd_pull_ctl_enable_tbl;
537 else if (card == RTSX_MS_CARD)
538 tbl = pcr->ms_pull_ctl_enable_tbl;
539 else
540 return -EINVAL;
541
542 return rtsx_pci_set_pull_ctl(pcr, tbl);
543 }
544 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
545
546 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
547 {
548 const u32 *tbl;
549
550 if (card == RTSX_SD_CARD)
551 tbl = pcr->sd_pull_ctl_disable_tbl;
552 else if (card == RTSX_MS_CARD)
553 tbl = pcr->ms_pull_ctl_disable_tbl;
554 else
555 return -EINVAL;
556
557
558 return rtsx_pci_set_pull_ctl(pcr, tbl);
559 }
560 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
561
562 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
563 {
564 pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
565
566 if (pcr->num_slots > 1)
567 pcr->bier |= MS_INT_EN;
568
569 /* Enable Bus Interrupt */
570 rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
571
572 dev_dbg(&(pcr->pci->dev), "RTSX_BIER: 0x%08x\n", pcr->bier);
573 }
574
575 static inline u8 double_ssc_depth(u8 depth)
576 {
577 return ((depth > 1) ? (depth - 1) : depth);
578 }
579
580 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
581 {
582 if (div > CLK_DIV_1) {
583 if (ssc_depth > (div - 1))
584 ssc_depth -= (div - 1);
585 else
586 ssc_depth = SSC_DEPTH_4M;
587 }
588
589 return ssc_depth;
590 }
591
592 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
593 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
594 {
595 int err, clk;
596 u8 n, clk_divider, mcu_cnt, div;
597 u8 depth[] = {
598 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
599 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
600 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
601 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
602 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
603 };
604
605 if (initial_mode) {
606 /* We use 250k(around) here, in initial stage */
607 clk_divider = SD_CLK_DIVIDE_128;
608 card_clock = 30000000;
609 } else {
610 clk_divider = SD_CLK_DIVIDE_0;
611 }
612 err = rtsx_pci_write_register(pcr, SD_CFG1,
613 SD_CLK_DIVIDE_MASK, clk_divider);
614 if (err < 0)
615 return err;
616
617 card_clock /= 1000000;
618 dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);
619
620 clk = card_clock;
621 if (!initial_mode && double_clk)
622 clk = card_clock * 2;
623 dev_dbg(&(pcr->pci->dev),
624 "Internal SSC clock: %dMHz (cur_clock = %d)\n",
625 clk, pcr->cur_clock);
626
627 if (clk == pcr->cur_clock)
628 return 0;
629
630 if (pcr->ops->conv_clk_and_div_n)
631 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
632 else
633 n = (u8)(clk - 2);
634 if ((clk <= 2) || (n > MAX_DIV_N_PCR))
635 return -EINVAL;
636
637 mcu_cnt = (u8)(125/clk + 3);
638 if (mcu_cnt > 15)
639 mcu_cnt = 15;
640
641 /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
642 div = CLK_DIV_1;
643 while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
644 if (pcr->ops->conv_clk_and_div_n) {
645 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
646 DIV_N_TO_CLK) * 2;
647 n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
648 CLK_TO_DIV_N);
649 } else {
650 n = (n + 2) * 2 - 2;
651 }
652 div++;
653 }
654 dev_dbg(&(pcr->pci->dev), "n = %d, div = %d\n", n, div);
655
656 ssc_depth = depth[ssc_depth];
657 if (double_clk)
658 ssc_depth = double_ssc_depth(ssc_depth);
659
660 ssc_depth = revise_ssc_depth(ssc_depth, div);
661 dev_dbg(&(pcr->pci->dev), "ssc_depth = %d\n", ssc_depth);
662
663 rtsx_pci_init_cmd(pcr);
664 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
665 CLK_LOW_FREQ, CLK_LOW_FREQ);
666 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
667 0xFF, (div << 4) | mcu_cnt);
668 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
669 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
670 SSC_DEPTH_MASK, ssc_depth);
671 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
672 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
673 if (vpclk) {
674 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
675 PHASE_NOT_RESET, 0);
676 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
677 PHASE_NOT_RESET, PHASE_NOT_RESET);
678 }
679
680 err = rtsx_pci_send_cmd(pcr, 2000);
681 if (err < 0)
682 return err;
683
684 /* Wait SSC clock stable */
685 udelay(10);
686 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
687 if (err < 0)
688 return err;
689
690 pcr->cur_clock = clk;
691 return 0;
692 }
693 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
694
695 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
696 {
697 if (pcr->ops->card_power_on)
698 return pcr->ops->card_power_on(pcr, card);
699
700 return 0;
701 }
702 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
703
704 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
705 {
706 if (pcr->ops->card_power_off)
707 return pcr->ops->card_power_off(pcr, card);
708
709 return 0;
710 }
711 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
712
713 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
714 {
715 unsigned int cd_mask[] = {
716 [RTSX_SD_CARD] = SD_EXIST,
717 [RTSX_MS_CARD] = MS_EXIST
718 };
719
720 if (!pcr->ms_pmos) {
721 /* When using single PMOS, accessing card is not permitted
722 * if the existing card is not the designated one.
723 */
724 if (pcr->card_exist & (~cd_mask[card]))
725 return -EIO;
726 }
727
728 return 0;
729 }
730 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
731
732 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
733 {
734 if (pcr->ops->switch_output_voltage)
735 return pcr->ops->switch_output_voltage(pcr, voltage);
736
737 return 0;
738 }
739 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
740
741 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
742 {
743 unsigned int val;
744
745 val = rtsx_pci_readl(pcr, RTSX_BIPR);
746 if (pcr->ops->cd_deglitch)
747 val = pcr->ops->cd_deglitch(pcr);
748
749 return val;
750 }
751 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
752
753 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
754 {
755 struct completion finish;
756
757 pcr->finish_me = &finish;
758 init_completion(&finish);
759
760 if (pcr->done)
761 complete(pcr->done);
762
763 if (!pcr->remove_pci)
764 rtsx_pci_stop_cmd(pcr);
765
766 wait_for_completion_interruptible_timeout(&finish,
767 msecs_to_jiffies(2));
768 pcr->finish_me = NULL;
769 }
770 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
771
772 static void rtsx_pci_card_detect(struct work_struct *work)
773 {
774 struct delayed_work *dwork;
775 struct rtsx_pcr *pcr;
776 unsigned long flags;
777 unsigned int card_detect = 0, card_inserted, card_removed;
778 u32 irq_status;
779
780 dwork = to_delayed_work(work);
781 pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
782
783 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
784
785 mutex_lock(&pcr->pcr_mutex);
786 spin_lock_irqsave(&pcr->lock, flags);
787
788 irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
789 dev_dbg(&(pcr->pci->dev), "irq_status: 0x%08x\n", irq_status);
790
791 irq_status &= CARD_EXIST;
792 card_inserted = pcr->card_inserted & irq_status;
793 card_removed = pcr->card_removed;
794 pcr->card_inserted = 0;
795 pcr->card_removed = 0;
796
797 spin_unlock_irqrestore(&pcr->lock, flags);
798
799 if (card_inserted || card_removed) {
800 dev_dbg(&(pcr->pci->dev),
801 "card_inserted: 0x%x, card_removed: 0x%x\n",
802 card_inserted, card_removed);
803
804 if (pcr->ops->cd_deglitch)
805 card_inserted = pcr->ops->cd_deglitch(pcr);
806
807 card_detect = card_inserted | card_removed;
808
809 pcr->card_exist |= card_inserted;
810 pcr->card_exist &= ~card_removed;
811 }
812
813 mutex_unlock(&pcr->pcr_mutex);
814
815 if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
816 pcr->slots[RTSX_SD_CARD].card_event(
817 pcr->slots[RTSX_SD_CARD].p_dev);
818 if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
819 pcr->slots[RTSX_MS_CARD].card_event(
820 pcr->slots[RTSX_MS_CARD].p_dev);
821 }
822
823 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
824 {
825 struct rtsx_pcr *pcr = dev_id;
826 u32 int_reg;
827
828 if (!pcr)
829 return IRQ_NONE;
830
831 spin_lock(&pcr->lock);
832
833 int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
834 /* Clear interrupt flag */
835 rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
836 if ((int_reg & pcr->bier) == 0) {
837 spin_unlock(&pcr->lock);
838 return IRQ_NONE;
839 }
840 if (int_reg == 0xFFFFFFFF) {
841 spin_unlock(&pcr->lock);
842 return IRQ_HANDLED;
843 }
844
845 int_reg &= (pcr->bier | 0x7FFFFF);
846
847 if (int_reg & SD_INT) {
848 if (int_reg & SD_EXIST) {
849 pcr->card_inserted |= SD_EXIST;
850 } else {
851 pcr->card_removed |= SD_EXIST;
852 pcr->card_inserted &= ~SD_EXIST;
853 }
854 }
855
856 if (int_reg & MS_INT) {
857 if (int_reg & MS_EXIST) {
858 pcr->card_inserted |= MS_EXIST;
859 } else {
860 pcr->card_removed |= MS_EXIST;
861 pcr->card_inserted &= ~MS_EXIST;
862 }
863 }
864
865 if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
866 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
867 pcr->trans_result = TRANS_RESULT_FAIL;
868 if (pcr->done)
869 complete(pcr->done);
870 } else if (int_reg & TRANS_OK_INT) {
871 pcr->trans_result = TRANS_RESULT_OK;
872 if (pcr->done)
873 complete(pcr->done);
874 }
875 }
876
877 if (pcr->card_inserted || pcr->card_removed)
878 schedule_delayed_work(&pcr->carddet_work,
879 msecs_to_jiffies(200));
880
881 spin_unlock(&pcr->lock);
882 return IRQ_HANDLED;
883 }
884
885 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
886 {
887 dev_info(&(pcr->pci->dev), "%s: pcr->msi_en = %d, pci->irq = %d\n",
888 __func__, pcr->msi_en, pcr->pci->irq);
889
890 if (request_irq(pcr->pci->irq, rtsx_pci_isr,
891 pcr->msi_en ? 0 : IRQF_SHARED,
892 DRV_NAME_RTSX_PCI, pcr)) {
893 dev_err(&(pcr->pci->dev),
894 "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
895 pcr->pci->irq);
896 return -1;
897 }
898
899 pcr->irq = pcr->pci->irq;
900 pci_intx(pcr->pci, !pcr->msi_en);
901
902 return 0;
903 }
904
905 static void rtsx_pci_idle_work(struct work_struct *work)
906 {
907 struct delayed_work *dwork = to_delayed_work(work);
908 struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
909
910 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
911
912 mutex_lock(&pcr->pcr_mutex);
913
914 pcr->state = PDEV_STAT_IDLE;
915
916 if (pcr->ops->disable_auto_blink)
917 pcr->ops->disable_auto_blink(pcr);
918 if (pcr->ops->turn_off_led)
919 pcr->ops->turn_off_led(pcr);
920
921 mutex_unlock(&pcr->pcr_mutex);
922 }
923
924 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
925 {
926 int err;
927
928 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
929
930 rtsx_pci_enable_bus_int(pcr);
931
932 /* Power on SSC */
933 err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
934 if (err < 0)
935 return err;
936
937 /* Wait SSC power stable */
938 udelay(200);
939
940 if (pcr->ops->optimize_phy) {
941 err = pcr->ops->optimize_phy(pcr);
942 if (err < 0)
943 return err;
944 }
945
946 rtsx_pci_init_cmd(pcr);
947
948 /* Set mcu_cnt to 7 to ensure data can be sampled properly */
949 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
950
951 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
952 /* Disable card clock */
953 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
954 /* Reset ASPM state to default value */
955 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
956 /* Reset delink mode */
957 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
958 /* Card driving select */
959 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
960 0x07, DRIVER_TYPE_D);
961 /* Enable SSC Clock */
962 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
963 0xFF, SSC_8X_EN | SSC_SEL_4M);
964 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
965 /* Disable cd_pwr_save */
966 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
967 /* Clear Link Ready Interrupt */
968 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
969 LINK_RDY_INT, LINK_RDY_INT);
970 /* Enlarge the estimation window of PERST# glitch
971 * to reduce the chance of invalid card interrupt
972 */
973 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
974 /* Update RC oscillator to 400k
975 * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
976 * 1: 2M 0: 400k
977 */
978 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
979 /* Set interrupt write clear
980 * bit 1: U_elbi_if_rd_clr_en
981 * 1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
982 * 0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
983 */
984 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
985 /* Force CLKREQ# PIN to drive 0 to request clock */
986 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
987
988 err = rtsx_pci_send_cmd(pcr, 100);
989 if (err < 0)
990 return err;
991
992 /* Enable clk_request_n to enable clock power management */
993 rtsx_pci_write_config_byte(pcr, 0x81, 1);
994 /* Enter L1 when host tx idle */
995 rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
996
997 if (pcr->ops->extra_init_hw) {
998 err = pcr->ops->extra_init_hw(pcr);
999 if (err < 0)
1000 return err;
1001 }
1002
1003 /* No CD interrupt if probing driver with card inserted.
1004 * So we need to initialize pcr->card_exist here.
1005 */
1006 if (pcr->ops->cd_deglitch)
1007 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1008 else
1009 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1010
1011 return 0;
1012 }
1013
1014 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1015 {
1016 int err;
1017
1018 spin_lock_init(&pcr->lock);
1019 mutex_init(&pcr->pcr_mutex);
1020
1021 switch (PCI_PID(pcr)) {
1022 default:
1023 case 0x5209:
1024 rts5209_init_params(pcr);
1025 break;
1026
1027 case 0x5229:
1028 rts5229_init_params(pcr);
1029 break;
1030
1031 case 0x5289:
1032 rtl8411_init_params(pcr);
1033 break;
1034
1035 case 0x5227:
1036 rts5227_init_params(pcr);
1037 break;
1038
1039 case 0x5249:
1040 rts5249_init_params(pcr);
1041 break;
1042
1043 case 0x5287:
1044 rtl8411b_init_params(pcr);
1045 break;
1046 }
1047
1048 dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",
1049 PCI_PID(pcr), pcr->ic_version);
1050
1051 pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1052 GFP_KERNEL);
1053 if (!pcr->slots)
1054 return -ENOMEM;
1055
1056 pcr->state = PDEV_STAT_IDLE;
1057 err = rtsx_pci_init_hw(pcr);
1058 if (err < 0) {
1059 kfree(pcr->slots);
1060 return err;
1061 }
1062
1063 return 0;
1064 }
1065
1066 static int rtsx_pci_probe(struct pci_dev *pcidev,
1067 const struct pci_device_id *id)
1068 {
1069 struct rtsx_pcr *pcr;
1070 struct pcr_handle *handle;
1071 u32 base, len;
1072 int ret, i;
1073
1074 dev_dbg(&(pcidev->dev),
1075 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1076 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1077 (int)pcidev->revision);
1078
1079 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1080 if (ret < 0)
1081 return ret;
1082
1083 ret = pci_enable_device(pcidev);
1084 if (ret)
1085 return ret;
1086
1087 ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1088 if (ret)
1089 goto disable;
1090
1091 pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1092 if (!pcr) {
1093 ret = -ENOMEM;
1094 goto release_pci;
1095 }
1096
1097 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1098 if (!handle) {
1099 ret = -ENOMEM;
1100 goto free_pcr;
1101 }
1102 handle->pcr = pcr;
1103
1104 idr_preload(GFP_KERNEL);
1105 spin_lock(&rtsx_pci_lock);
1106 ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1107 if (ret >= 0)
1108 pcr->id = ret;
1109 spin_unlock(&rtsx_pci_lock);
1110 idr_preload_end();
1111 if (ret < 0)
1112 goto free_handle;
1113
1114 pcr->pci = pcidev;
1115 dev_set_drvdata(&pcidev->dev, handle);
1116
1117 len = pci_resource_len(pcidev, 0);
1118 base = pci_resource_start(pcidev, 0);
1119 pcr->remap_addr = ioremap_nocache(base, len);
1120 if (!pcr->remap_addr) {
1121 ret = -ENOMEM;
1122 goto free_host;
1123 }
1124
1125 pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1126 RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1127 GFP_KERNEL);
1128 if (pcr->rtsx_resv_buf == NULL) {
1129 ret = -ENXIO;
1130 goto unmap;
1131 }
1132 pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1133 pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1134 pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1135 pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1136
1137 pcr->card_inserted = 0;
1138 pcr->card_removed = 0;
1139 INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1140 INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1141
1142 pcr->msi_en = msi_en;
1143 if (pcr->msi_en) {
1144 ret = pci_enable_msi(pcidev);
1145 if (ret < 0)
1146 pcr->msi_en = false;
1147 }
1148
1149 ret = rtsx_pci_acquire_irq(pcr);
1150 if (ret < 0)
1151 goto disable_msi;
1152
1153 pci_set_master(pcidev);
1154 synchronize_irq(pcr->irq);
1155
1156 ret = rtsx_pci_init_chip(pcr);
1157 if (ret < 0)
1158 goto disable_irq;
1159
1160 for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1161 rtsx_pcr_cells[i].platform_data = handle;
1162 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1163 }
1164 ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1165 ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1166 if (ret < 0)
1167 goto disable_irq;
1168
1169 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1170
1171 return 0;
1172
1173 disable_irq:
1174 free_irq(pcr->irq, (void *)pcr);
1175 disable_msi:
1176 if (pcr->msi_en)
1177 pci_disable_msi(pcr->pci);
1178 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1179 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1180 unmap:
1181 iounmap(pcr->remap_addr);
1182 free_host:
1183 dev_set_drvdata(&pcidev->dev, NULL);
1184 free_handle:
1185 kfree(handle);
1186 free_pcr:
1187 kfree(pcr);
1188 release_pci:
1189 pci_release_regions(pcidev);
1190 disable:
1191 pci_disable_device(pcidev);
1192
1193 return ret;
1194 }
1195
1196 static void rtsx_pci_remove(struct pci_dev *pcidev)
1197 {
1198 struct pcr_handle *handle = pci_get_drvdata(pcidev);
1199 struct rtsx_pcr *pcr = handle->pcr;
1200
1201 pcr->remove_pci = true;
1202
1203 cancel_delayed_work(&pcr->carddet_work);
1204 cancel_delayed_work(&pcr->idle_work);
1205
1206 mfd_remove_devices(&pcidev->dev);
1207
1208 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1209 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1210 free_irq(pcr->irq, (void *)pcr);
1211 if (pcr->msi_en)
1212 pci_disable_msi(pcr->pci);
1213 iounmap(pcr->remap_addr);
1214
1215 dev_set_drvdata(&pcidev->dev, NULL);
1216 pci_release_regions(pcidev);
1217 pci_disable_device(pcidev);
1218
1219 spin_lock(&rtsx_pci_lock);
1220 idr_remove(&rtsx_pci_idr, pcr->id);
1221 spin_unlock(&rtsx_pci_lock);
1222
1223 kfree(pcr->slots);
1224 kfree(pcr);
1225 kfree(handle);
1226
1227 dev_dbg(&(pcidev->dev),
1228 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1229 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1230 }
1231
1232 #ifdef CONFIG_PM
1233
1234 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1235 {
1236 struct pcr_handle *handle;
1237 struct rtsx_pcr *pcr;
1238 int ret = 0;
1239
1240 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1241
1242 handle = pci_get_drvdata(pcidev);
1243 pcr = handle->pcr;
1244
1245 cancel_delayed_work(&pcr->carddet_work);
1246 cancel_delayed_work(&pcr->idle_work);
1247
1248 mutex_lock(&pcr->pcr_mutex);
1249
1250 if (pcr->ops->turn_off_led)
1251 pcr->ops->turn_off_led(pcr);
1252
1253 rtsx_pci_writel(pcr, RTSX_BIER, 0);
1254 pcr->bier = 0;
1255
1256 rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
1257 rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x02);
1258
1259 pci_save_state(pcidev);
1260 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1261 pci_disable_device(pcidev);
1262 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1263
1264 mutex_unlock(&pcr->pcr_mutex);
1265 return ret;
1266 }
1267
1268 static int rtsx_pci_resume(struct pci_dev *pcidev)
1269 {
1270 struct pcr_handle *handle;
1271 struct rtsx_pcr *pcr;
1272 int ret = 0;
1273
1274 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1275
1276 handle = pci_get_drvdata(pcidev);
1277 pcr = handle->pcr;
1278
1279 mutex_lock(&pcr->pcr_mutex);
1280
1281 pci_set_power_state(pcidev, PCI_D0);
1282 pci_restore_state(pcidev);
1283 ret = pci_enable_device(pcidev);
1284 if (ret)
1285 goto out;
1286 pci_set_master(pcidev);
1287
1288 ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1289 if (ret)
1290 goto out;
1291
1292 ret = rtsx_pci_init_hw(pcr);
1293 if (ret)
1294 goto out;
1295
1296 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1297
1298 out:
1299 mutex_unlock(&pcr->pcr_mutex);
1300 return ret;
1301 }
1302
1303 #else /* CONFIG_PM */
1304
1305 #define rtsx_pci_suspend NULL
1306 #define rtsx_pci_resume NULL
1307
1308 #endif /* CONFIG_PM */
1309
1310 static struct pci_driver rtsx_pci_driver = {
1311 .name = DRV_NAME_RTSX_PCI,
1312 .id_table = rtsx_pci_ids,
1313 .probe = rtsx_pci_probe,
1314 .remove = rtsx_pci_remove,
1315 .suspend = rtsx_pci_suspend,
1316 .resume = rtsx_pci_resume,
1317 };
1318 module_pci_driver(rtsx_pci_driver);
1319
1320 MODULE_LICENSE("GPL");
1321 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1322 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");
Linus' kernel tree