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