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drm/qxl: add support for > 1 output
[linux-2.6.git] / drivers / mfd / rtsx_pcr.c
blobe968c01ca2ac82fdadc00501f1a155a052d37544
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 { 0, }
61 };
62
63 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
64
65 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
66 {
67 /* If pci device removed, don't queue idle work any more */
68 if (pcr->remove_pci)
69 return;
70
71 if (pcr->state != PDEV_STAT_RUN) {
72 pcr->state = PDEV_STAT_RUN;
73 if (pcr->ops->enable_auto_blink)
74 pcr->ops->enable_auto_blink(pcr);
75 }
76
77 mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
78 }
79 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
80
81 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
82 {
83 int i;
84 u32 val = HAIMR_WRITE_START;
85
86 val |= (u32)(addr & 0x3FFF) << 16;
87 val |= (u32)mask << 8;
88 val |= (u32)data;
89
90 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
91
92 for (i = 0; i < MAX_RW_REG_CNT; i++) {
93 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
94 if ((val & HAIMR_TRANS_END) == 0) {
95 if (data != (u8)val)
96 return -EIO;
97 return 0;
98 }
99 }
100
101 return -ETIMEDOUT;
102 }
103 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
104
105 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
106 {
107 u32 val = HAIMR_READ_START;
108 int i;
109
110 val |= (u32)(addr & 0x3FFF) << 16;
111 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
112
113 for (i = 0; i < MAX_RW_REG_CNT; i++) {
114 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
115 if ((val & HAIMR_TRANS_END) == 0)
116 break;
117 }
118
119 if (i >= MAX_RW_REG_CNT)
120 return -ETIMEDOUT;
121
122 if (data)
123 *data = (u8)(val & 0xFF);
124
125 return 0;
126 }
127 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
128
129 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
130 {
131 int err, i, finished = 0;
132 u8 tmp;
133
134 rtsx_pci_init_cmd(pcr);
135
136 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
137 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
138 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
139 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
140
141 err = rtsx_pci_send_cmd(pcr, 100);
142 if (err < 0)
143 return err;
144
145 for (i = 0; i < 100000; i++) {
146 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
147 if (err < 0)
148 return err;
149
150 if (!(tmp & 0x80)) {
151 finished = 1;
152 break;
153 }
154 }
155
156 if (!finished)
157 return -ETIMEDOUT;
158
159 return 0;
160 }
161 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
162
163 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
164 {
165 int err, i, finished = 0;
166 u16 data;
167 u8 *ptr, tmp;
168
169 rtsx_pci_init_cmd(pcr);
170
171 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
172 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
173
174 err = rtsx_pci_send_cmd(pcr, 100);
175 if (err < 0)
176 return err;
177
178 for (i = 0; i < 100000; i++) {
179 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
180 if (err < 0)
181 return err;
182
183 if (!(tmp & 0x80)) {
184 finished = 1;
185 break;
186 }
187 }
188
189 if (!finished)
190 return -ETIMEDOUT;
191
192 rtsx_pci_init_cmd(pcr);
193
194 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
195 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
196
197 err = rtsx_pci_send_cmd(pcr, 100);
198 if (err < 0)
199 return err;
200
201 ptr = rtsx_pci_get_cmd_data(pcr);
202 data = ((u16)ptr[1] << 8) | ptr[0];
203
204 if (val)
205 *val = data;
206
207 return 0;
208 }
209 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
210
211 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
212 {
213 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
214 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
215
216 rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
217 rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
218 }
219 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
220
221 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
222 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
223 {
224 unsigned long flags;
225 u32 val = 0;
226 u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
227
228 val |= (u32)(cmd_type & 0x03) << 30;
229 val |= (u32)(reg_addr & 0x3FFF) << 16;
230 val |= (u32)mask << 8;
231 val |= (u32)data;
232
233 spin_lock_irqsave(&pcr->lock, flags);
234 ptr += pcr->ci;
235 if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
236 put_unaligned_le32(val, ptr);
237 ptr++;
238 pcr->ci++;
239 }
240 spin_unlock_irqrestore(&pcr->lock, flags);
241 }
242 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
243
244 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
245 {
246 u32 val = 1 << 31;
247
248 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
249
250 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
251 /* Hardware Auto Response */
252 val |= 0x40000000;
253 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
254 }
255 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
256
257 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
258 {
259 struct completion trans_done;
260 u32 val = 1 << 31;
261 long timeleft;
262 unsigned long flags;
263 int err = 0;
264
265 spin_lock_irqsave(&pcr->lock, flags);
266
267 /* set up data structures for the wakeup system */
268 pcr->done = &trans_done;
269 pcr->trans_result = TRANS_NOT_READY;
270 init_completion(&trans_done);
271
272 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
273
274 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
275 /* Hardware Auto Response */
276 val |= 0x40000000;
277 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
278
279 spin_unlock_irqrestore(&pcr->lock, flags);
280
281 /* Wait for TRANS_OK_INT */
282 timeleft = wait_for_completion_interruptible_timeout(
283 &trans_done, msecs_to_jiffies(timeout));
284 if (timeleft <= 0) {
285 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
286 __func__, __LINE__);
287 err = -ETIMEDOUT;
288 goto finish_send_cmd;
289 }
290
291 spin_lock_irqsave(&pcr->lock, flags);
292 if (pcr->trans_result == TRANS_RESULT_FAIL)
293 err = -EINVAL;
294 else if (pcr->trans_result == TRANS_RESULT_OK)
295 err = 0;
296 else if (pcr->trans_result == TRANS_NO_DEVICE)
297 err = -ENODEV;
298 spin_unlock_irqrestore(&pcr->lock, flags);
299
300 finish_send_cmd:
301 spin_lock_irqsave(&pcr->lock, flags);
302 pcr->done = NULL;
303 spin_unlock_irqrestore(&pcr->lock, flags);
304
305 if ((err < 0) && (err != -ENODEV))
306 rtsx_pci_stop_cmd(pcr);
307
308 if (pcr->finish_me)
309 complete(pcr->finish_me);
310
311 return err;
312 }
313 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
314
315 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
316 dma_addr_t addr, unsigned int len, int end)
317 {
318 u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
319 u64 val;
320 u8 option = SG_VALID | SG_TRANS_DATA;
321
322 dev_dbg(&(pcr->pci->dev), "DMA addr: 0x%x, Len: 0x%x\n",
323 (unsigned int)addr, len);
324
325 if (end)
326 option |= SG_END;
327 val = ((u64)addr << 32) | ((u64)len << 12) | option;
328
329 put_unaligned_le64(val, ptr);
330 pcr->sgi++;
331 }
332
333 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
334 int num_sg, bool read, int timeout)
335 {
336 struct completion trans_done;
337 u8 dir;
338 int err = 0, i, count;
339 long timeleft;
340 unsigned long flags;
341 struct scatterlist *sg;
342 enum dma_data_direction dma_dir;
343 u32 val;
344 dma_addr_t addr;
345 unsigned int len;
346
347 dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
348
349 /* don't transfer data during abort processing */
350 if (pcr->remove_pci)
351 return -EINVAL;
352
353 if ((sglist == NULL) || (num_sg <= 0))
354 return -EINVAL;
355
356 if (read) {
357 dir = DEVICE_TO_HOST;
358 dma_dir = DMA_FROM_DEVICE;
359 } else {
360 dir = HOST_TO_DEVICE;
361 dma_dir = DMA_TO_DEVICE;
362 }
363
364 count = dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
365 if (count < 1) {
366 dev_err(&(pcr->pci->dev), "scatterlist map failed\n");
367 return -EINVAL;
368 }
369 dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
370
371 val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
372 pcr->sgi = 0;
373 for_each_sg(sglist, sg, count, i) {
374 addr = sg_dma_address(sg);
375 len = sg_dma_len(sg);
376 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
377 }
378
379 spin_lock_irqsave(&pcr->lock, flags);
380
381 pcr->done = &trans_done;
382 pcr->trans_result = TRANS_NOT_READY;
383 init_completion(&trans_done);
384 rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
385 rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
386
387 spin_unlock_irqrestore(&pcr->lock, flags);
388
389 timeleft = wait_for_completion_interruptible_timeout(
390 &trans_done, msecs_to_jiffies(timeout));
391 if (timeleft <= 0) {
392 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
393 __func__, __LINE__);
394 err = -ETIMEDOUT;
395 goto out;
396 }
397
398 spin_lock_irqsave(&pcr->lock, flags);
399
400 if (pcr->trans_result == TRANS_RESULT_FAIL)
401 err = -EINVAL;
402 else if (pcr->trans_result == TRANS_NO_DEVICE)
403 err = -ENODEV;
404
405 spin_unlock_irqrestore(&pcr->lock, flags);
406
407 out:
408 spin_lock_irqsave(&pcr->lock, flags);
409 pcr->done = NULL;
410 spin_unlock_irqrestore(&pcr->lock, flags);
411
412 dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
413
414 if ((err < 0) && (err != -ENODEV))
415 rtsx_pci_stop_cmd(pcr);
416
417 if (pcr->finish_me)
418 complete(pcr->finish_me);
419
420 return err;
421 }
422 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
423
424 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
425 {
426 int err;
427 int i, j;
428 u16 reg;
429 u8 *ptr;
430
431 if (buf_len > 512)
432 buf_len = 512;
433
434 ptr = buf;
435 reg = PPBUF_BASE2;
436 for (i = 0; i < buf_len / 256; i++) {
437 rtsx_pci_init_cmd(pcr);
438
439 for (j = 0; j < 256; j++)
440 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
441
442 err = rtsx_pci_send_cmd(pcr, 250);
443 if (err < 0)
444 return err;
445
446 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
447 ptr += 256;
448 }
449
450 if (buf_len % 256) {
451 rtsx_pci_init_cmd(pcr);
452
453 for (j = 0; j < buf_len % 256; j++)
454 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
455
456 err = rtsx_pci_send_cmd(pcr, 250);
457 if (err < 0)
458 return err;
459 }
460
461 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
462
463 return 0;
464 }
465 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
466
467 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
468 {
469 int err;
470 int i, j;
471 u16 reg;
472 u8 *ptr;
473
474 if (buf_len > 512)
475 buf_len = 512;
476
477 ptr = buf;
478 reg = PPBUF_BASE2;
479 for (i = 0; i < buf_len / 256; i++) {
480 rtsx_pci_init_cmd(pcr);
481
482 for (j = 0; j < 256; j++) {
483 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
484 reg++, 0xFF, *ptr);
485 ptr++;
486 }
487
488 err = rtsx_pci_send_cmd(pcr, 250);
489 if (err < 0)
490 return err;
491 }
492
493 if (buf_len % 256) {
494 rtsx_pci_init_cmd(pcr);
495
496 for (j = 0; j < buf_len % 256; j++) {
497 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
498 reg++, 0xFF, *ptr);
499 ptr++;
500 }
501
502 err = rtsx_pci_send_cmd(pcr, 250);
503 if (err < 0)
504 return err;
505 }
506
507 return 0;
508 }
509 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
510
511 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
512 {
513 int err;
514
515 rtsx_pci_init_cmd(pcr);
516
517 while (*tbl & 0xFFFF0000) {
518 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
519 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
520 tbl++;
521 }
522
523 err = rtsx_pci_send_cmd(pcr, 100);
524 if (err < 0)
525 return err;
526
527 return 0;
528 }
529
530 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
531 {
532 const u32 *tbl;
533
534 if (card == RTSX_SD_CARD)
535 tbl = pcr->sd_pull_ctl_enable_tbl;
536 else if (card == RTSX_MS_CARD)
537 tbl = pcr->ms_pull_ctl_enable_tbl;
538 else
539 return -EINVAL;
540
541 return rtsx_pci_set_pull_ctl(pcr, tbl);
542 }
543 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
544
545 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
546 {
547 const u32 *tbl;
548
549 if (card == RTSX_SD_CARD)
550 tbl = pcr->sd_pull_ctl_disable_tbl;
551 else if (card == RTSX_MS_CARD)
552 tbl = pcr->ms_pull_ctl_disable_tbl;
553 else
554 return -EINVAL;
555
556
557 return rtsx_pci_set_pull_ctl(pcr, tbl);
558 }
559 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
560
561 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
562 {
563 pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
564
565 if (pcr->num_slots > 1)
566 pcr->bier |= MS_INT_EN;
567
568 /* Enable Bus Interrupt */
569 rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
570
571 dev_dbg(&(pcr->pci->dev), "RTSX_BIER: 0x%08x\n", pcr->bier);
572 }
573
574 static inline u8 double_ssc_depth(u8 depth)
575 {
576 return ((depth > 1) ? (depth - 1) : depth);
577 }
578
579 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
580 {
581 if (div > CLK_DIV_1) {
582 if (ssc_depth > (div - 1))
583 ssc_depth -= (div - 1);
584 else
585 ssc_depth = SSC_DEPTH_4M;
586 }
587
588 return ssc_depth;
589 }
590
591 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
592 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
593 {
594 int err, clk;
595 u8 n, clk_divider, mcu_cnt, div;
596 u8 depth[] = {
597 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
598 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
599 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
600 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
601 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
602 };
603
604 if (initial_mode) {
605 /* We use 250k(around) here, in initial stage */
606 clk_divider = SD_CLK_DIVIDE_128;
607 card_clock = 30000000;
608 } else {
609 clk_divider = SD_CLK_DIVIDE_0;
610 }
611 err = rtsx_pci_write_register(pcr, SD_CFG1,
612 SD_CLK_DIVIDE_MASK, clk_divider);
613 if (err < 0)
614 return err;
615
616 card_clock /= 1000000;
617 dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);
618
619 clk = card_clock;
620 if (!initial_mode && double_clk)
621 clk = card_clock * 2;
622 dev_dbg(&(pcr->pci->dev),
623 "Internal SSC clock: %dMHz (cur_clock = %d)\n",
624 clk, pcr->cur_clock);
625
626 if (clk == pcr->cur_clock)
627 return 0;
628
629 if (pcr->ops->conv_clk_and_div_n)
630 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
631 else
632 n = (u8)(clk - 2);
633 if ((clk <= 2) || (n > MAX_DIV_N_PCR))
634 return -EINVAL;
635
636 mcu_cnt = (u8)(125/clk + 3);
637 if (mcu_cnt > 15)
638 mcu_cnt = 15;
639
640 /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
641 div = CLK_DIV_1;
642 while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
643 if (pcr->ops->conv_clk_and_div_n) {
644 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
645 DIV_N_TO_CLK) * 2;
646 n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
647 CLK_TO_DIV_N);
648 } else {
649 n = (n + 2) * 2 - 2;
650 }
651 div++;
652 }
653 dev_dbg(&(pcr->pci->dev), "n = %d, div = %d\n", n, div);
654
655 ssc_depth = depth[ssc_depth];
656 if (double_clk)
657 ssc_depth = double_ssc_depth(ssc_depth);
658
659 ssc_depth = revise_ssc_depth(ssc_depth, div);
660 dev_dbg(&(pcr->pci->dev), "ssc_depth = %d\n", ssc_depth);
661
662 rtsx_pci_init_cmd(pcr);
663 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
664 CLK_LOW_FREQ, CLK_LOW_FREQ);
665 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
666 0xFF, (div << 4) | mcu_cnt);
667 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
668 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
669 SSC_DEPTH_MASK, ssc_depth);
670 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
671 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
672 if (vpclk) {
673 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
674 PHASE_NOT_RESET, 0);
675 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
676 PHASE_NOT_RESET, PHASE_NOT_RESET);
677 }
678
679 err = rtsx_pci_send_cmd(pcr, 2000);
680 if (err < 0)
681 return err;
682
683 /* Wait SSC clock stable */
684 udelay(10);
685 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
686 if (err < 0)
687 return err;
688
689 pcr->cur_clock = clk;
690 return 0;
691 }
692 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
693
694 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
695 {
696 if (pcr->ops->card_power_on)
697 return pcr->ops->card_power_on(pcr, card);
698
699 return 0;
700 }
701 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
702
703 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
704 {
705 if (pcr->ops->card_power_off)
706 return pcr->ops->card_power_off(pcr, card);
707
708 return 0;
709 }
710 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
711
712 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
713 {
714 unsigned int cd_mask[] = {
715 [RTSX_SD_CARD] = SD_EXIST,
716 [RTSX_MS_CARD] = MS_EXIST
717 };
718
719 if (!pcr->ms_pmos) {
720 /* When using single PMOS, accessing card is not permitted
721 * if the existing card is not the designated one.
722 */
723 if (pcr->card_exist & (~cd_mask[card]))
724 return -EIO;
725 }
726
727 return 0;
728 }
729 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
730
731 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
732 {
733 if (pcr->ops->switch_output_voltage)
734 return pcr->ops->switch_output_voltage(pcr, voltage);
735
736 return 0;
737 }
738 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
739
740 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
741 {
742 unsigned int val;
743
744 val = rtsx_pci_readl(pcr, RTSX_BIPR);
745 if (pcr->ops->cd_deglitch)
746 val = pcr->ops->cd_deglitch(pcr);
747
748 return val;
749 }
750 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
751
752 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
753 {
754 struct completion finish;
755
756 pcr->finish_me = &finish;
757 init_completion(&finish);
758
759 if (pcr->done)
760 complete(pcr->done);
761
762 if (!pcr->remove_pci)
763 rtsx_pci_stop_cmd(pcr);
764
765 wait_for_completion_interruptible_timeout(&finish,
766 msecs_to_jiffies(2));
767 pcr->finish_me = NULL;
768 }
769 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
770
771 static void rtsx_pci_card_detect(struct work_struct *work)
772 {
773 struct delayed_work *dwork;
774 struct rtsx_pcr *pcr;
775 unsigned long flags;
776 unsigned int card_detect = 0, card_inserted, card_removed;
777 u32 irq_status;
778
779 dwork = to_delayed_work(work);
780 pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
781
782 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
783
784 mutex_lock(&pcr->pcr_mutex);
785 spin_lock_irqsave(&pcr->lock, flags);
786
787 irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
788 dev_dbg(&(pcr->pci->dev), "irq_status: 0x%08x\n", irq_status);
789
790 irq_status &= CARD_EXIST;
791 card_inserted = pcr->card_inserted & irq_status;
792 card_removed = pcr->card_removed;
793 pcr->card_inserted = 0;
794 pcr->card_removed = 0;
795
796 spin_unlock_irqrestore(&pcr->lock, flags);
797
798 if (card_inserted || card_removed) {
799 dev_dbg(&(pcr->pci->dev),
800 "card_inserted: 0x%x, card_removed: 0x%x\n",
801 card_inserted, card_removed);
802
803 if (pcr->ops->cd_deglitch)
804 card_inserted = pcr->ops->cd_deglitch(pcr);
805
806 card_detect = card_inserted | card_removed;
807
808 pcr->card_exist |= card_inserted;
809 pcr->card_exist &= ~card_removed;
810 }
811
812 mutex_unlock(&pcr->pcr_mutex);
813
814 if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
815 pcr->slots[RTSX_SD_CARD].card_event(
816 pcr->slots[RTSX_SD_CARD].p_dev);
817 if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
818 pcr->slots[RTSX_MS_CARD].card_event(
819 pcr->slots[RTSX_MS_CARD].p_dev);
820 }
821
822 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
823 {
824 struct rtsx_pcr *pcr = dev_id;
825 u32 int_reg;
826
827 if (!pcr)
828 return IRQ_NONE;
829
830 spin_lock(&pcr->lock);
831
832 int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
833 /* Clear interrupt flag */
834 rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
835 if ((int_reg & pcr->bier) == 0) {
836 spin_unlock(&pcr->lock);
837 return IRQ_NONE;
838 }
839 if (int_reg == 0xFFFFFFFF) {
840 spin_unlock(&pcr->lock);
841 return IRQ_HANDLED;
842 }
843
844 int_reg &= (pcr->bier | 0x7FFFFF);
845
846 if (int_reg & SD_INT) {
847 if (int_reg & SD_EXIST) {
848 pcr->card_inserted |= SD_EXIST;
849 } else {
850 pcr->card_removed |= SD_EXIST;
851 pcr->card_inserted &= ~SD_EXIST;
852 }
853 }
854
855 if (int_reg & MS_INT) {
856 if (int_reg & MS_EXIST) {
857 pcr->card_inserted |= MS_EXIST;
858 } else {
859 pcr->card_removed |= MS_EXIST;
860 pcr->card_inserted &= ~MS_EXIST;
861 }
862 }
863
864 if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
865 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
866 pcr->trans_result = TRANS_RESULT_FAIL;
867 if (pcr->done)
868 complete(pcr->done);
869 } else if (int_reg & TRANS_OK_INT) {
870 pcr->trans_result = TRANS_RESULT_OK;
871 if (pcr->done)
872 complete(pcr->done);
873 }
874 }
875
876 if (pcr->card_inserted || pcr->card_removed)
877 schedule_delayed_work(&pcr->carddet_work,
878 msecs_to_jiffies(200));
879
880 spin_unlock(&pcr->lock);
881 return IRQ_HANDLED;
882 }
883
884 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
885 {
886 dev_info(&(pcr->pci->dev), "%s: pcr->msi_en = %d, pci->irq = %d\n",
887 __func__, pcr->msi_en, pcr->pci->irq);
888
889 if (request_irq(pcr->pci->irq, rtsx_pci_isr,
890 pcr->msi_en ? 0 : IRQF_SHARED,
891 DRV_NAME_RTSX_PCI, pcr)) {
892 dev_err(&(pcr->pci->dev),
893 "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
894 pcr->pci->irq);
895 return -1;
896 }
897
898 pcr->irq = pcr->pci->irq;
899 pci_intx(pcr->pci, !pcr->msi_en);
900
901 return 0;
902 }
903
904 static void rtsx_pci_idle_work(struct work_struct *work)
905 {
906 struct delayed_work *dwork = to_delayed_work(work);
907 struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
908
909 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
910
911 mutex_lock(&pcr->pcr_mutex);
912
913 pcr->state = PDEV_STAT_IDLE;
914
915 if (pcr->ops->disable_auto_blink)
916 pcr->ops->disable_auto_blink(pcr);
917 if (pcr->ops->turn_off_led)
918 pcr->ops->turn_off_led(pcr);
919
920 mutex_unlock(&pcr->pcr_mutex);
921 }
922
923 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
924 {
925 int err;
926
927 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
928
929 rtsx_pci_enable_bus_int(pcr);
930
931 /* Power on SSC */
932 err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
933 if (err < 0)
934 return err;
935
936 /* Wait SSC power stable */
937 udelay(200);
938
939 if (pcr->ops->optimize_phy) {
940 err = pcr->ops->optimize_phy(pcr);
941 if (err < 0)
942 return err;
943 }
944
945 rtsx_pci_init_cmd(pcr);
946
947 /* Set mcu_cnt to 7 to ensure data can be sampled properly */
948 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
949
950 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
951 /* Disable card clock */
952 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
953 /* Reset ASPM state to default value */
954 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
955 /* Reset delink mode */
956 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
957 /* Card driving select */
958 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
959 0x07, DRIVER_TYPE_D);
960 /* Enable SSC Clock */
961 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
962 0xFF, SSC_8X_EN | SSC_SEL_4M);
963 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
964 /* Disable cd_pwr_save */
965 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
966 /* Clear Link Ready Interrupt */
967 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
968 LINK_RDY_INT, LINK_RDY_INT);
969 /* Enlarge the estimation window of PERST# glitch
970 * to reduce the chance of invalid card interrupt
971 */
972 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
973 /* Update RC oscillator to 400k
974 * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
975 * 1: 2M 0: 400k
976 */
977 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
978 /* Set interrupt write clear
979 * bit 1: U_elbi_if_rd_clr_en
980 * 1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
981 * 0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
982 */
983 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
984 /* Force CLKREQ# PIN to drive 0 to request clock */
985 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
986
987 err = rtsx_pci_send_cmd(pcr, 100);
988 if (err < 0)
989 return err;
990
991 /* Enable clk_request_n to enable clock power management */
992 rtsx_pci_write_config_byte(pcr, 0x81, 1);
993 /* Enter L1 when host tx idle */
994 rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
995
996 if (pcr->ops->extra_init_hw) {
997 err = pcr->ops->extra_init_hw(pcr);
998 if (err < 0)
999 return err;
1000 }
1001
1002 /* No CD interrupt if probing driver with card inserted.
1003 * So we need to initialize pcr->card_exist here.
1004 */
1005 if (pcr->ops->cd_deglitch)
1006 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1007 else
1008 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1009
1010 return 0;
1011 }
1012
1013 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1014 {
1015 int err;
1016
1017 spin_lock_init(&pcr->lock);
1018 mutex_init(&pcr->pcr_mutex);
1019
1020 switch (PCI_PID(pcr)) {
1021 default:
1022 case 0x5209:
1023 rts5209_init_params(pcr);
1024 break;
1025
1026 case 0x5229:
1027 rts5229_init_params(pcr);
1028 break;
1029
1030 case 0x5289:
1031 rtl8411_init_params(pcr);
1032 break;
1033
1034 case 0x5227:
1035 rts5227_init_params(pcr);
1036 break;
1037
1038 case 0x5249:
1039 rts5249_init_params(pcr);
1040 break;
1041 }
1042
1043 dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",
1044 PCI_PID(pcr), pcr->ic_version);
1045
1046 pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1047 GFP_KERNEL);
1048 if (!pcr->slots)
1049 return -ENOMEM;
1050
1051 pcr->state = PDEV_STAT_IDLE;
1052 err = rtsx_pci_init_hw(pcr);
1053 if (err < 0) {
1054 kfree(pcr->slots);
1055 return err;
1056 }
1057
1058 return 0;
1059 }
1060
1061 static int rtsx_pci_probe(struct pci_dev *pcidev,
1062 const struct pci_device_id *id)
1063 {
1064 struct rtsx_pcr *pcr;
1065 struct pcr_handle *handle;
1066 u32 base, len;
1067 int ret, i;
1068
1069 dev_dbg(&(pcidev->dev),
1070 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1071 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1072 (int)pcidev->revision);
1073
1074 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1075 if (ret < 0)
1076 return ret;
1077
1078 ret = pci_enable_device(pcidev);
1079 if (ret)
1080 return ret;
1081
1082 ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1083 if (ret)
1084 goto disable;
1085
1086 pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1087 if (!pcr) {
1088 ret = -ENOMEM;
1089 goto release_pci;
1090 }
1091
1092 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1093 if (!handle) {
1094 ret = -ENOMEM;
1095 goto free_pcr;
1096 }
1097 handle->pcr = pcr;
1098
1099 idr_preload(GFP_KERNEL);
1100 spin_lock(&rtsx_pci_lock);
1101 ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1102 if (ret >= 0)
1103 pcr->id = ret;
1104 spin_unlock(&rtsx_pci_lock);
1105 idr_preload_end();
1106 if (ret < 0)
1107 goto free_handle;
1108
1109 pcr->pci = pcidev;
1110 dev_set_drvdata(&pcidev->dev, handle);
1111
1112 len = pci_resource_len(pcidev, 0);
1113 base = pci_resource_start(pcidev, 0);
1114 pcr->remap_addr = ioremap_nocache(base, len);
1115 if (!pcr->remap_addr) {
1116 ret = -ENOMEM;
1117 goto free_host;
1118 }
1119
1120 pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1121 RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1122 GFP_KERNEL);
1123 if (pcr->rtsx_resv_buf == NULL) {
1124 ret = -ENXIO;
1125 goto unmap;
1126 }
1127 pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1128 pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1129 pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1130 pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1131
1132 pcr->card_inserted = 0;
1133 pcr->card_removed = 0;
1134 INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1135 INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1136
1137 pcr->msi_en = msi_en;
1138 if (pcr->msi_en) {
1139 ret = pci_enable_msi(pcidev);
1140 if (ret < 0)
1141 pcr->msi_en = false;
1142 }
1143
1144 ret = rtsx_pci_acquire_irq(pcr);
1145 if (ret < 0)
1146 goto disable_msi;
1147
1148 pci_set_master(pcidev);
1149 synchronize_irq(pcr->irq);
1150
1151 ret = rtsx_pci_init_chip(pcr);
1152 if (ret < 0)
1153 goto disable_irq;
1154
1155 for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1156 rtsx_pcr_cells[i].platform_data = handle;
1157 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1158 }
1159 ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1160 ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1161 if (ret < 0)
1162 goto disable_irq;
1163
1164 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1165
1166 return 0;
1167
1168 disable_irq:
1169 free_irq(pcr->irq, (void *)pcr);
1170 disable_msi:
1171 if (pcr->msi_en)
1172 pci_disable_msi(pcr->pci);
1173 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1174 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1175 unmap:
1176 iounmap(pcr->remap_addr);
1177 free_host:
1178 dev_set_drvdata(&pcidev->dev, NULL);
1179 free_handle:
1180 kfree(handle);
1181 free_pcr:
1182 kfree(pcr);
1183 release_pci:
1184 pci_release_regions(pcidev);
1185 disable:
1186 pci_disable_device(pcidev);
1187
1188 return ret;
1189 }
1190
1191 static void rtsx_pci_remove(struct pci_dev *pcidev)
1192 {
1193 struct pcr_handle *handle = pci_get_drvdata(pcidev);
1194 struct rtsx_pcr *pcr = handle->pcr;
1195
1196 pcr->remove_pci = true;
1197
1198 cancel_delayed_work(&pcr->carddet_work);
1199 cancel_delayed_work(&pcr->idle_work);
1200
1201 mfd_remove_devices(&pcidev->dev);
1202
1203 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1204 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1205 free_irq(pcr->irq, (void *)pcr);
1206 if (pcr->msi_en)
1207 pci_disable_msi(pcr->pci);
1208 iounmap(pcr->remap_addr);
1209
1210 dev_set_drvdata(&pcidev->dev, NULL);
1211 pci_release_regions(pcidev);
1212 pci_disable_device(pcidev);
1213
1214 spin_lock(&rtsx_pci_lock);
1215 idr_remove(&rtsx_pci_idr, pcr->id);
1216 spin_unlock(&rtsx_pci_lock);
1217
1218 kfree(pcr->slots);
1219 kfree(pcr);
1220 kfree(handle);
1221
1222 dev_dbg(&(pcidev->dev),
1223 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1224 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1225 }
1226
1227 #ifdef CONFIG_PM
1228
1229 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1230 {
1231 struct pcr_handle *handle;
1232 struct rtsx_pcr *pcr;
1233 int ret = 0;
1234
1235 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1236
1237 handle = pci_get_drvdata(pcidev);
1238 pcr = handle->pcr;
1239
1240 cancel_delayed_work(&pcr->carddet_work);
1241 cancel_delayed_work(&pcr->idle_work);
1242
1243 mutex_lock(&pcr->pcr_mutex);
1244
1245 if (pcr->ops->turn_off_led)
1246 pcr->ops->turn_off_led(pcr);
1247
1248 rtsx_pci_writel(pcr, RTSX_BIER, 0);
1249 pcr->bier = 0;
1250
1251 rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
1252 rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x02);
1253
1254 pci_save_state(pcidev);
1255 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1256 pci_disable_device(pcidev);
1257 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1258
1259 mutex_unlock(&pcr->pcr_mutex);
1260 return ret;
1261 }
1262
1263 static int rtsx_pci_resume(struct pci_dev *pcidev)
1264 {
1265 struct pcr_handle *handle;
1266 struct rtsx_pcr *pcr;
1267 int ret = 0;
1268
1269 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1270
1271 handle = pci_get_drvdata(pcidev);
1272 pcr = handle->pcr;
1273
1274 mutex_lock(&pcr->pcr_mutex);
1275
1276 pci_set_power_state(pcidev, PCI_D0);
1277 pci_restore_state(pcidev);
1278 ret = pci_enable_device(pcidev);
1279 if (ret)
1280 goto out;
1281 pci_set_master(pcidev);
1282
1283 ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1284 if (ret)
1285 goto out;
1286
1287 ret = rtsx_pci_init_hw(pcr);
1288 if (ret)
1289 goto out;
1290
1291 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1292
1293 out:
1294 mutex_unlock(&pcr->pcr_mutex);
1295 return ret;
1296 }
1297
1298 #else /* CONFIG_PM */
1299
1300 #define rtsx_pci_suspend NULL
1301 #define rtsx_pci_resume NULL
1302
1303 #endif /* CONFIG_PM */
1304
1305 static struct pci_driver rtsx_pci_driver = {
1306 .name = DRV_NAME_RTSX_PCI,
1307 .id_table = rtsx_pci_ids,
1308 .probe = rtsx_pci_probe,
1309 .remove = rtsx_pci_remove,
1310 .suspend = rtsx_pci_suspend,
1311 .resume = rtsx_pci_resume,
1312 };
1313 module_pci_driver(rtsx_pci_driver);
1314
1315 MODULE_LICENSE("GPL");
1316 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1317 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");
Linus' kernel tree