1 /* Driver for Realtek PCI-Express card reader
2 *
3 * Copyright(c) 2009-2013 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 */
21
22 #include <linux/pci.h>
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/highmem.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/idr.h>
30 #include <linux/platform_device.h>
31 #include <linux/mfd/core.h>
32 #include <linux/mfd/rtsx_pci.h>
33 #include <asm/unaligned.h>
34
35 #include "rtsx_pcr.h"
36
37 static bool msi_en = true;
38 module_param(msi_en, bool, S_IRUGO | S_IWUSR);
39 MODULE_PARM_DESC(msi_en, "Enable MSI");
40
41 static DEFINE_IDR(rtsx_pci_idr);
42 static DEFINE_SPINLOCK(rtsx_pci_lock);
43
44 static struct mfd_cell rtsx_pcr_cells[] = {
45 [RTSX_SD_CARD] = {
46 .name = DRV_NAME_RTSX_PCI_SDMMC,
47 },
48 [RTSX_MS_CARD] = {
49 .name = DRV_NAME_RTSX_PCI_MS,
50 },
51 };
52
53 static const struct pci_device_id rtsx_pci_ids[] = {
54 { PCI_DEVICE(0x10EC, 0x5209), PCI_CLASS_OTHERS << 16, 0xFF0000 },
55 { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
56 { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
57 { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
58 { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
59 { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
60 { PCI_DEVICE(0x10EC, 0x5286), PCI_CLASS_OTHERS << 16, 0xFF0000 },
61 { 0, }
62 };
63
64 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
65
rtsx_pci_start_run(struct rtsx_pcr * pcr)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 if (pcr->aspm_en)
78 rtsx_pci_write_config_byte(pcr, LCTLR, 0);
79 }
80
81 mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
82 }
83 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
84
rtsx_pci_write_register(struct rtsx_pcr * pcr,u16 addr,u8 mask,u8 data)85 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
86 {
87 int i;
88 u32 val = HAIMR_WRITE_START;
89
90 val |= (u32)(addr & 0x3FFF) << 16;
91 val |= (u32)mask << 8;
92 val |= (u32)data;
93
94 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
95
96 for (i = 0; i < MAX_RW_REG_CNT; i++) {
97 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
98 if ((val & HAIMR_TRANS_END) == 0) {
99 if (data != (u8)val)
100 return -EIO;
101 return 0;
102 }
103 }
104
105 return -ETIMEDOUT;
106 }
107 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
108
rtsx_pci_read_register(struct rtsx_pcr * pcr,u16 addr,u8 * data)109 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
110 {
111 u32 val = HAIMR_READ_START;
112 int i;
113
114 val |= (u32)(addr & 0x3FFF) << 16;
115 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
116
117 for (i = 0; i < MAX_RW_REG_CNT; i++) {
118 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
119 if ((val & HAIMR_TRANS_END) == 0)
120 break;
121 }
122
123 if (i >= MAX_RW_REG_CNT)
124 return -ETIMEDOUT;
125
126 if (data)
127 *data = (u8)(val & 0xFF);
128
129 return 0;
130 }
131 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
132
rtsx_pci_write_phy_register(struct rtsx_pcr * pcr,u8 addr,u16 val)133 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
134 {
135 int err, i, finished = 0;
136 u8 tmp;
137
138 rtsx_pci_init_cmd(pcr);
139
140 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
141 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
142 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
143 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
144
145 err = rtsx_pci_send_cmd(pcr, 100);
146 if (err < 0)
147 return err;
148
149 for (i = 0; i < 100000; i++) {
150 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
151 if (err < 0)
152 return err;
153
154 if (!(tmp & 0x80)) {
155 finished = 1;
156 break;
157 }
158 }
159
160 if (!finished)
161 return -ETIMEDOUT;
162
163 return 0;
164 }
165 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
166
rtsx_pci_read_phy_register(struct rtsx_pcr * pcr,u8 addr,u16 * val)167 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
168 {
169 int err, i, finished = 0;
170 u16 data;
171 u8 *ptr, tmp;
172
173 rtsx_pci_init_cmd(pcr);
174
175 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
176 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
177
178 err = rtsx_pci_send_cmd(pcr, 100);
179 if (err < 0)
180 return err;
181
182 for (i = 0; i < 100000; i++) {
183 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
184 if (err < 0)
185 return err;
186
187 if (!(tmp & 0x80)) {
188 finished = 1;
189 break;
190 }
191 }
192
193 if (!finished)
194 return -ETIMEDOUT;
195
196 rtsx_pci_init_cmd(pcr);
197
198 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
199 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
200
201 err = rtsx_pci_send_cmd(pcr, 100);
202 if (err < 0)
203 return err;
204
205 ptr = rtsx_pci_get_cmd_data(pcr);
206 data = ((u16)ptr[1] << 8) | ptr[0];
207
208 if (val)
209 *val = data;
210
211 return 0;
212 }
213 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
214
rtsx_pci_stop_cmd(struct rtsx_pcr * pcr)215 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
216 {
217 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
218 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
219
220 rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
221 rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
222 }
223 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
224
rtsx_pci_add_cmd(struct rtsx_pcr * pcr,u8 cmd_type,u16 reg_addr,u8 mask,u8 data)225 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
226 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
227 {
228 unsigned long flags;
229 u32 val = 0;
230 u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
231
232 val |= (u32)(cmd_type & 0x03) << 30;
233 val |= (u32)(reg_addr & 0x3FFF) << 16;
234 val |= (u32)mask << 8;
235 val |= (u32)data;
236
237 spin_lock_irqsave(&pcr->lock, flags);
238 ptr += pcr->ci;
239 if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
240 put_unaligned_le32(val, ptr);
241 ptr++;
242 pcr->ci++;
243 }
244 spin_unlock_irqrestore(&pcr->lock, flags);
245 }
246 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
247
rtsx_pci_send_cmd_no_wait(struct rtsx_pcr * pcr)248 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
249 {
250 u32 val = 1 << 31;
251
252 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
253
254 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
255 /* Hardware Auto Response */
256 val |= 0x40000000;
257 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
258 }
259 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
260
rtsx_pci_send_cmd(struct rtsx_pcr * pcr,int timeout)261 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
262 {
263 struct completion trans_done;
264 u32 val = 1 << 31;
265 long timeleft;
266 unsigned long flags;
267 int err = 0;
268
269 spin_lock_irqsave(&pcr->lock, flags);
270
271 /* set up data structures for the wakeup system */
272 pcr->done = &trans_done;
273 pcr->trans_result = TRANS_NOT_READY;
274 init_completion(&trans_done);
275
276 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
277
278 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
279 /* Hardware Auto Response */
280 val |= 0x40000000;
281 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
282
283 spin_unlock_irqrestore(&pcr->lock, flags);
284
285 /* Wait for TRANS_OK_INT */
286 timeleft = wait_for_completion_interruptible_timeout(
287 &trans_done, msecs_to_jiffies(timeout));
288 if (timeleft <= 0) {
289 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
290 __func__, __LINE__);
291 err = -ETIMEDOUT;
292 goto finish_send_cmd;
293 }
294
295 spin_lock_irqsave(&pcr->lock, flags);
296 if (pcr->trans_result == TRANS_RESULT_FAIL)
297 err = -EINVAL;
298 else if (pcr->trans_result == TRANS_RESULT_OK)
299 err = 0;
300 else if (pcr->trans_result == TRANS_NO_DEVICE)
301 err = -ENODEV;
302 spin_unlock_irqrestore(&pcr->lock, flags);
303
304 finish_send_cmd:
305 spin_lock_irqsave(&pcr->lock, flags);
306 pcr->done = NULL;
307 spin_unlock_irqrestore(&pcr->lock, flags);
308
309 if ((err < 0) && (err != -ENODEV))
310 rtsx_pci_stop_cmd(pcr);
311
312 if (pcr->finish_me)
313 complete(pcr->finish_me);
314
315 return err;
316 }
317 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
318
rtsx_pci_add_sg_tbl(struct rtsx_pcr * pcr,dma_addr_t addr,unsigned int len,int end)319 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
320 dma_addr_t addr, unsigned int len, int end)
321 {
322 u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
323 u64 val;
324 u8 option = SG_VALID | SG_TRANS_DATA;
325
326 dev_dbg(&(pcr->pci->dev), "DMA addr: 0x%x, Len: 0x%x\n",
327 (unsigned int)addr, len);
328
329 if (end)
330 option |= SG_END;
331 val = ((u64)addr << 32) | ((u64)len << 12) | option;
332
333 put_unaligned_le64(val, ptr);
334 pcr->sgi++;
335 }
336
rtsx_pci_transfer_data(struct rtsx_pcr * pcr,struct scatterlist * sglist,int num_sg,bool read,int timeout)337 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
338 int num_sg, bool read, int timeout)
339 {
340 int err = 0, count;
341
342 dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
343 count = rtsx_pci_dma_map_sg(pcr, sglist, num_sg, read);
344 if (count < 1)
345 return -EINVAL;
346 dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
347
348 err = rtsx_pci_dma_transfer(pcr, sglist, count, read, timeout);
349
350 rtsx_pci_dma_unmap_sg(pcr, sglist, num_sg, read);
351
352 return err;
353 }
354 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
355
rtsx_pci_dma_map_sg(struct rtsx_pcr * pcr,struct scatterlist * sglist,int num_sg,bool read)356 int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
357 int num_sg, bool read)
358 {
359 enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
360
361 if (pcr->remove_pci)
362 return -EINVAL;
363
364 if ((sglist == NULL) || (num_sg <= 0))
365 return -EINVAL;
366
367 return dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dir);
368 }
369 EXPORT_SYMBOL_GPL(rtsx_pci_dma_map_sg);
370
rtsx_pci_dma_unmap_sg(struct rtsx_pcr * pcr,struct scatterlist * sglist,int num_sg,bool read)371 void rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
372 int num_sg, bool read)
373 {
374 enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
375
376 dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dir);
377 }
378 EXPORT_SYMBOL_GPL(rtsx_pci_dma_unmap_sg);
379
rtsx_pci_dma_transfer(struct rtsx_pcr * pcr,struct scatterlist * sglist,int count,bool read,int timeout)380 int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist,
381 int count, bool read, int timeout)
382 {
383 struct completion trans_done;
384 struct scatterlist *sg;
385 dma_addr_t addr;
386 long timeleft;
387 unsigned long flags;
388 unsigned int len;
389 int i, err = 0;
390 u32 val;
391 u8 dir = read ? DEVICE_TO_HOST : HOST_TO_DEVICE;
392
393 if (pcr->remove_pci)
394 return -ENODEV;
395
396 if ((sglist == NULL) || (count < 1))
397 return -EINVAL;
398
399 val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
400 pcr->sgi = 0;
401 for_each_sg(sglist, sg, count, i) {
402 addr = sg_dma_address(sg);
403 len = sg_dma_len(sg);
404 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
405 }
406
407 spin_lock_irqsave(&pcr->lock, flags);
408
409 pcr->done = &trans_done;
410 pcr->trans_result = TRANS_NOT_READY;
411 init_completion(&trans_done);
412 rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
413 rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
414
415 spin_unlock_irqrestore(&pcr->lock, flags);
416
417 timeleft = wait_for_completion_interruptible_timeout(
418 &trans_done, msecs_to_jiffies(timeout));
419 if (timeleft <= 0) {
420 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
421 __func__, __LINE__);
422 err = -ETIMEDOUT;
423 goto out;
424 }
425
426 spin_lock_irqsave(&pcr->lock, flags);
427 if (pcr->trans_result == TRANS_RESULT_FAIL)
428 err = -EINVAL;
429 else if (pcr->trans_result == TRANS_NO_DEVICE)
430 err = -ENODEV;
431 spin_unlock_irqrestore(&pcr->lock, flags);
432
433 out:
434 spin_lock_irqsave(&pcr->lock, flags);
435 pcr->done = NULL;
436 spin_unlock_irqrestore(&pcr->lock, flags);
437
438 if ((err < 0) && (err != -ENODEV))
439 rtsx_pci_stop_cmd(pcr);
440
441 if (pcr->finish_me)
442 complete(pcr->finish_me);
443
444 return err;
445 }
446 EXPORT_SYMBOL_GPL(rtsx_pci_dma_transfer);
447
rtsx_pci_read_ppbuf(struct rtsx_pcr * pcr,u8 * buf,int buf_len)448 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
449 {
450 int err;
451 int i, j;
452 u16 reg;
453 u8 *ptr;
454
455 if (buf_len > 512)
456 buf_len = 512;
457
458 ptr = buf;
459 reg = PPBUF_BASE2;
460 for (i = 0; i < buf_len / 256; i++) {
461 rtsx_pci_init_cmd(pcr);
462
463 for (j = 0; j < 256; j++)
464 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
465
466 err = rtsx_pci_send_cmd(pcr, 250);
467 if (err < 0)
468 return err;
469
470 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
471 ptr += 256;
472 }
473
474 if (buf_len % 256) {
475 rtsx_pci_init_cmd(pcr);
476
477 for (j = 0; j < buf_len % 256; j++)
478 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
479
480 err = rtsx_pci_send_cmd(pcr, 250);
481 if (err < 0)
482 return err;
483 }
484
485 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
486
487 return 0;
488 }
489 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
490
rtsx_pci_write_ppbuf(struct rtsx_pcr * pcr,u8 * buf,int buf_len)491 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
492 {
493 int err;
494 int i, j;
495 u16 reg;
496 u8 *ptr;
497
498 if (buf_len > 512)
499 buf_len = 512;
500
501 ptr = buf;
502 reg = PPBUF_BASE2;
503 for (i = 0; i < buf_len / 256; i++) {
504 rtsx_pci_init_cmd(pcr);
505
506 for (j = 0; j < 256; j++) {
507 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
508 reg++, 0xFF, *ptr);
509 ptr++;
510 }
511
512 err = rtsx_pci_send_cmd(pcr, 250);
513 if (err < 0)
514 return err;
515 }
516
517 if (buf_len % 256) {
518 rtsx_pci_init_cmd(pcr);
519
520 for (j = 0; j < buf_len % 256; j++) {
521 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
522 reg++, 0xFF, *ptr);
523 ptr++;
524 }
525
526 err = rtsx_pci_send_cmd(pcr, 250);
527 if (err < 0)
528 return err;
529 }
530
531 return 0;
532 }
533 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
534
rtsx_pci_set_pull_ctl(struct rtsx_pcr * pcr,const u32 * tbl)535 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
536 {
537 int err;
538
539 rtsx_pci_init_cmd(pcr);
540
541 while (*tbl & 0xFFFF0000) {
542 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
543 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
544 tbl++;
545 }
546
547 err = rtsx_pci_send_cmd(pcr, 100);
548 if (err < 0)
549 return err;
550
551 return 0;
552 }
553
rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr * pcr,int card)554 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
555 {
556 const u32 *tbl;
557
558 if (card == RTSX_SD_CARD)
559 tbl = pcr->sd_pull_ctl_enable_tbl;
560 else if (card == RTSX_MS_CARD)
561 tbl = pcr->ms_pull_ctl_enable_tbl;
562 else
563 return -EINVAL;
564
565 return rtsx_pci_set_pull_ctl(pcr, tbl);
566 }
567 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
568
rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr * pcr,int card)569 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
570 {
571 const u32 *tbl;
572
573 if (card == RTSX_SD_CARD)
574 tbl = pcr->sd_pull_ctl_disable_tbl;
575 else if (card == RTSX_MS_CARD)
576 tbl = pcr->ms_pull_ctl_disable_tbl;
577 else
578 return -EINVAL;
579
580
581 return rtsx_pci_set_pull_ctl(pcr, tbl);
582 }
583 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
584
rtsx_pci_enable_bus_int(struct rtsx_pcr * pcr)585 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
586 {
587 pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
588
589 if (pcr->num_slots > 1)
590 pcr->bier |= MS_INT_EN;
591
592 /* Enable Bus Interrupt */
593 rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
594
595 dev_dbg(&(pcr->pci->dev), "RTSX_BIER: 0x%08x\n", pcr->bier);
596 }
597
double_ssc_depth(u8 depth)598 static inline u8 double_ssc_depth(u8 depth)
599 {
600 return ((depth > 1) ? (depth - 1) : depth);
601 }
602
revise_ssc_depth(u8 ssc_depth,u8 div)603 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
604 {
605 if (div > CLK_DIV_1) {
606 if (ssc_depth > (div - 1))
607 ssc_depth -= (div - 1);
608 else
609 ssc_depth = SSC_DEPTH_4M;
610 }
611
612 return ssc_depth;
613 }
614
rtsx_pci_switch_clock(struct rtsx_pcr * pcr,unsigned int card_clock,u8 ssc_depth,bool initial_mode,bool double_clk,bool vpclk)615 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
616 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
617 {
618 int err, clk;
619 u8 n, clk_divider, mcu_cnt, div;
620 u8 depth[] = {
621 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
622 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
623 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
624 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
625 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
626 };
627
628 if (initial_mode) {
629 /* We use 250k(around) here, in initial stage */
630 clk_divider = SD_CLK_DIVIDE_128;
631 card_clock = 30000000;
632 } else {
633 clk_divider = SD_CLK_DIVIDE_0;
634 }
635 err = rtsx_pci_write_register(pcr, SD_CFG1,
636 SD_CLK_DIVIDE_MASK, clk_divider);
637 if (err < 0)
638 return err;
639
640 card_clock /= 1000000;
641 dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);
642
643 clk = card_clock;
644 if (!initial_mode && double_clk)
645 clk = card_clock * 2;
646 dev_dbg(&(pcr->pci->dev),
647 "Internal SSC clock: %dMHz (cur_clock = %d)\n",
648 clk, pcr->cur_clock);
649
650 if (clk == pcr->cur_clock)
651 return 0;
652
653 if (pcr->ops->conv_clk_and_div_n)
654 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
655 else
656 n = (u8)(clk - 2);
657 if ((clk <= 2) || (n > MAX_DIV_N_PCR))
658 return -EINVAL;
659
660 mcu_cnt = (u8)(125/clk + 3);
661 if (mcu_cnt > 15)
662 mcu_cnt = 15;
663
664 /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
665 div = CLK_DIV_1;
666 while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
667 if (pcr->ops->conv_clk_and_div_n) {
668 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
669 DIV_N_TO_CLK) * 2;
670 n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
671 CLK_TO_DIV_N);
672 } else {
673 n = (n + 2) * 2 - 2;
674 }
675 div++;
676 }
677 dev_dbg(&(pcr->pci->dev), "n = %d, div = %d\n", n, div);
678
679 ssc_depth = depth[ssc_depth];
680 if (double_clk)
681 ssc_depth = double_ssc_depth(ssc_depth);
682
683 ssc_depth = revise_ssc_depth(ssc_depth, div);
684 dev_dbg(&(pcr->pci->dev), "ssc_depth = %d\n", ssc_depth);
685
686 rtsx_pci_init_cmd(pcr);
687 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
688 CLK_LOW_FREQ, CLK_LOW_FREQ);
689 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
690 0xFF, (div << 4) | mcu_cnt);
691 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
692 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
693 SSC_DEPTH_MASK, ssc_depth);
694 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
695 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
696 if (vpclk) {
697 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
698 PHASE_NOT_RESET, 0);
699 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
700 PHASE_NOT_RESET, PHASE_NOT_RESET);
701 }
702
703 err = rtsx_pci_send_cmd(pcr, 2000);
704 if (err < 0)
705 return err;
706
707 /* Wait SSC clock stable */
708 udelay(10);
709 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
710 if (err < 0)
711 return err;
712
713 pcr->cur_clock = clk;
714 return 0;
715 }
716 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
717
rtsx_pci_card_power_on(struct rtsx_pcr * pcr,int card)718 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
719 {
720 if (pcr->ops->card_power_on)
721 return pcr->ops->card_power_on(pcr, card);
722
723 return 0;
724 }
725 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
726
rtsx_pci_card_power_off(struct rtsx_pcr * pcr,int card)727 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
728 {
729 if (pcr->ops->card_power_off)
730 return pcr->ops->card_power_off(pcr, card);
731
732 return 0;
733 }
734 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
735
rtsx_pci_card_exclusive_check(struct rtsx_pcr * pcr,int card)736 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
737 {
738 unsigned int cd_mask[] = {
739 [RTSX_SD_CARD] = SD_EXIST,
740 [RTSX_MS_CARD] = MS_EXIST
741 };
742
743 if (!(pcr->flags & PCR_MS_PMOS)) {
744 /* When using single PMOS, accessing card is not permitted
745 * if the existing card is not the designated one.
746 */
747 if (pcr->card_exist & (~cd_mask[card]))
748 return -EIO;
749 }
750
751 return 0;
752 }
753 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
754
rtsx_pci_switch_output_voltage(struct rtsx_pcr * pcr,u8 voltage)755 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
756 {
757 if (pcr->ops->switch_output_voltage)
758 return pcr->ops->switch_output_voltage(pcr, voltage);
759
760 return 0;
761 }
762 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
763
rtsx_pci_card_exist(struct rtsx_pcr * pcr)764 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
765 {
766 unsigned int val;
767
768 val = rtsx_pci_readl(pcr, RTSX_BIPR);
769 if (pcr->ops->cd_deglitch)
770 val = pcr->ops->cd_deglitch(pcr);
771
772 return val;
773 }
774 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
775
rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr * pcr)776 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
777 {
778 struct completion finish;
779
780 pcr->finish_me = &finish;
781 init_completion(&finish);
782
783 if (pcr->done)
784 complete(pcr->done);
785
786 if (!pcr->remove_pci)
787 rtsx_pci_stop_cmd(pcr);
788
789 wait_for_completion_interruptible_timeout(&finish,
790 msecs_to_jiffies(2));
791 pcr->finish_me = NULL;
792 }
793 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
794
rtsx_pci_card_detect(struct work_struct * work)795 static void rtsx_pci_card_detect(struct work_struct *work)
796 {
797 struct delayed_work *dwork;
798 struct rtsx_pcr *pcr;
799 unsigned long flags;
800 unsigned int card_detect = 0, card_inserted, card_removed;
801 u32 irq_status;
802
803 dwork = to_delayed_work(work);
804 pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
805
806 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
807
808 mutex_lock(&pcr->pcr_mutex);
809 spin_lock_irqsave(&pcr->lock, flags);
810
811 irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
812 dev_dbg(&(pcr->pci->dev), "irq_status: 0x%08x\n", irq_status);
813
814 irq_status &= CARD_EXIST;
815 card_inserted = pcr->card_inserted & irq_status;
816 card_removed = pcr->card_removed;
817 pcr->card_inserted = 0;
818 pcr->card_removed = 0;
819
820 spin_unlock_irqrestore(&pcr->lock, flags);
821
822 if (card_inserted || card_removed) {
823 dev_dbg(&(pcr->pci->dev),
824 "card_inserted: 0x%x, card_removed: 0x%x\n",
825 card_inserted, card_removed);
826
827 if (pcr->ops->cd_deglitch)
828 card_inserted = pcr->ops->cd_deglitch(pcr);
829
830 card_detect = card_inserted | card_removed;
831
832 pcr->card_exist |= card_inserted;
833 pcr->card_exist &= ~card_removed;
834 }
835
836 mutex_unlock(&pcr->pcr_mutex);
837
838 if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
839 pcr->slots[RTSX_SD_CARD].card_event(
840 pcr->slots[RTSX_SD_CARD].p_dev);
841 if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
842 pcr->slots[RTSX_MS_CARD].card_event(
843 pcr->slots[RTSX_MS_CARD].p_dev);
844 }
845
rtsx_pci_isr(int irq,void * dev_id)846 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
847 {
848 struct rtsx_pcr *pcr = dev_id;
849 u32 int_reg;
850
851 if (!pcr)
852 return IRQ_NONE;
853
854 spin_lock(&pcr->lock);
855
856 int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
857 /* Clear interrupt flag */
858 rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
859 if ((int_reg & pcr->bier) == 0) {
860 spin_unlock(&pcr->lock);
861 return IRQ_NONE;
862 }
863 if (int_reg == 0xFFFFFFFF) {
864 spin_unlock(&pcr->lock);
865 return IRQ_HANDLED;
866 }
867
868 int_reg &= (pcr->bier | 0x7FFFFF);
869
870 if (int_reg & SD_INT) {
871 if (int_reg & SD_EXIST) {
872 pcr->card_inserted |= SD_EXIST;
873 } else {
874 pcr->card_removed |= SD_EXIST;
875 pcr->card_inserted &= ~SD_EXIST;
876 }
877 }
878
879 if (int_reg & MS_INT) {
880 if (int_reg & MS_EXIST) {
881 pcr->card_inserted |= MS_EXIST;
882 } else {
883 pcr->card_removed |= MS_EXIST;
884 pcr->card_inserted &= ~MS_EXIST;
885 }
886 }
887
888 if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
889 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
890 pcr->trans_result = TRANS_RESULT_FAIL;
891 if (pcr->done)
892 complete(pcr->done);
893 } else if (int_reg & TRANS_OK_INT) {
894 pcr->trans_result = TRANS_RESULT_OK;
895 if (pcr->done)
896 complete(pcr->done);
897 }
898 }
899
900 if (pcr->card_inserted || pcr->card_removed)
901 schedule_delayed_work(&pcr->carddet_work,
902 msecs_to_jiffies(200));
903
904 spin_unlock(&pcr->lock);
905 return IRQ_HANDLED;
906 }
907
rtsx_pci_acquire_irq(struct rtsx_pcr * pcr)908 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
909 {
910 dev_info(&(pcr->pci->dev), "%s: pcr->msi_en = %d, pci->irq = %d\n",
911 __func__, pcr->msi_en, pcr->pci->irq);
912
913 if (request_irq(pcr->pci->irq, rtsx_pci_isr,
914 pcr->msi_en ? 0 : IRQF_SHARED,
915 DRV_NAME_RTSX_PCI, pcr)) {
916 dev_err(&(pcr->pci->dev),
917 "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
918 pcr->pci->irq);
919 return -1;
920 }
921
922 pcr->irq = pcr->pci->irq;
923 pci_intx(pcr->pci, !pcr->msi_en);
924
925 return 0;
926 }
927
rtsx_pci_idle_work(struct work_struct * work)928 static void rtsx_pci_idle_work(struct work_struct *work)
929 {
930 struct delayed_work *dwork = to_delayed_work(work);
931 struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
932
933 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
934
935 mutex_lock(&pcr->pcr_mutex);
936
937 pcr->state = PDEV_STAT_IDLE;
938
939 if (pcr->ops->disable_auto_blink)
940 pcr->ops->disable_auto_blink(pcr);
941 if (pcr->ops->turn_off_led)
942 pcr->ops->turn_off_led(pcr);
943
944 if (pcr->aspm_en)
945 rtsx_pci_write_config_byte(pcr, LCTLR, pcr->aspm_en);
946
947 mutex_unlock(&pcr->pcr_mutex);
948 }
949
950 #ifdef CONFIG_PM
rtsx_pci_power_off(struct rtsx_pcr * pcr,u8 pm_state)951 static void rtsx_pci_power_off(struct rtsx_pcr *pcr, u8 pm_state)
952 {
953 if (pcr->ops->turn_off_led)
954 pcr->ops->turn_off_led(pcr);
955
956 rtsx_pci_writel(pcr, RTSX_BIER, 0);
957 pcr->bier = 0;
958
959 rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
960 rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, pm_state);
961
962 if (pcr->ops->force_power_down)
963 pcr->ops->force_power_down(pcr, pm_state);
964 }
965 #endif
966
rtsx_pci_init_hw(struct rtsx_pcr * pcr)967 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
968 {
969 int err;
970
971 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
972
973 rtsx_pci_enable_bus_int(pcr);
974
975 /* Power on SSC */
976 err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
977 if (err < 0)
978 return err;
979
980 /* Wait SSC power stable */
981 udelay(200);
982
983 if (pcr->ops->optimize_phy) {
984 err = pcr->ops->optimize_phy(pcr);
985 if (err < 0)
986 return err;
987 }
988
989 rtsx_pci_init_cmd(pcr);
990
991 /* Set mcu_cnt to 7 to ensure data can be sampled properly */
992 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
993
994 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
995 /* Disable card clock */
996 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
997 /* Reset delink mode */
998 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
999 /* Card driving select */
1000 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DRIVE_SEL,
1001 0xFF, pcr->card_drive_sel);
1002 /* Enable SSC Clock */
1003 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
1004 0xFF, SSC_8X_EN | SSC_SEL_4M);
1005 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
1006 /* Disable cd_pwr_save */
1007 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
1008 /* Clear Link Ready Interrupt */
1009 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
1010 LINK_RDY_INT, LINK_RDY_INT);
1011 /* Enlarge the estimation window of PERST# glitch
1012 * to reduce the chance of invalid card interrupt
1013 */
1014 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
1015 /* Update RC oscillator to 400k
1016 * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
1017 * 1: 2M 0: 400k
1018 */
1019 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
1020 /* Set interrupt write clear
1021 * bit 1: U_elbi_if_rd_clr_en
1022 * 1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
1023 * 0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
1024 */
1025 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
1026
1027 err = rtsx_pci_send_cmd(pcr, 100);
1028 if (err < 0)
1029 return err;
1030
1031 rtsx_pci_write_config_byte(pcr, LCTLR, 0);
1032
1033 /* Enable clk_request_n to enable clock power management */
1034 rtsx_pci_write_config_byte(pcr, 0x81, 1);
1035 /* Enter L1 when host tx idle */
1036 rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
1037
1038 if (pcr->ops->extra_init_hw) {
1039 err = pcr->ops->extra_init_hw(pcr);
1040 if (err < 0)
1041 return err;
1042 }
1043
1044 /* No CD interrupt if probing driver with card inserted.
1045 * So we need to initialize pcr->card_exist here.
1046 */
1047 if (pcr->ops->cd_deglitch)
1048 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1049 else
1050 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1051
1052 return 0;
1053 }
1054
rtsx_pci_init_chip(struct rtsx_pcr * pcr)1055 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1056 {
1057 int err;
1058
1059 spin_lock_init(&pcr->lock);
1060 mutex_init(&pcr->pcr_mutex);
1061
1062 switch (PCI_PID(pcr)) {
1063 default:
1064 case 0x5209:
1065 rts5209_init_params(pcr);
1066 break;
1067
1068 case 0x5229:
1069 rts5229_init_params(pcr);
1070 break;
1071
1072 case 0x5289:
1073 rtl8411_init_params(pcr);
1074 break;
1075
1076 case 0x5227:
1077 rts5227_init_params(pcr);
1078 break;
1079
1080 case 0x5249:
1081 rts5249_init_params(pcr);
1082 break;
1083
1084 case 0x5287:
1085 rtl8411b_init_params(pcr);
1086 break;
1087
1088 case 0x5286:
1089 rtl8402_init_params(pcr);
1090 break;
1091 }
1092
1093 dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",
1094 PCI_PID(pcr), pcr->ic_version);
1095
1096 pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1097 GFP_KERNEL);
1098 if (!pcr->slots)
1099 return -ENOMEM;
1100
1101 if (pcr->ops->fetch_vendor_settings)
1102 pcr->ops->fetch_vendor_settings(pcr);
1103
1104 dev_dbg(&(pcr->pci->dev), "pcr->aspm_en = 0x%x\n", pcr->aspm_en);
1105 dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_1v8 = 0x%x\n",
1106 pcr->sd30_drive_sel_1v8);
1107 dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_3v3 = 0x%x\n",
1108 pcr->sd30_drive_sel_3v3);
1109 dev_dbg(&(pcr->pci->dev), "pcr->card_drive_sel = 0x%x\n",
1110 pcr->card_drive_sel);
1111 dev_dbg(&(pcr->pci->dev), "pcr->flags = 0x%x\n", pcr->flags);
1112
1113 pcr->state = PDEV_STAT_IDLE;
1114 err = rtsx_pci_init_hw(pcr);
1115 if (err < 0) {
1116 kfree(pcr->slots);
1117 return err;
1118 }
1119
1120 return 0;
1121 }
1122
rtsx_pci_probe(struct pci_dev * pcidev,const struct pci_device_id * id)1123 static int rtsx_pci_probe(struct pci_dev *pcidev,
1124 const struct pci_device_id *id)
1125 {
1126 struct rtsx_pcr *pcr;
1127 struct pcr_handle *handle;
1128 u32 base, len;
1129 int ret, i;
1130
1131 dev_dbg(&(pcidev->dev),
1132 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1133 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1134 (int)pcidev->revision);
1135
1136 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1137 if (ret < 0)
1138 return ret;
1139
1140 ret = pci_enable_device(pcidev);
1141 if (ret)
1142 return ret;
1143
1144 ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1145 if (ret)
1146 goto disable;
1147
1148 pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1149 if (!pcr) {
1150 ret = -ENOMEM;
1151 goto release_pci;
1152 }
1153
1154 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1155 if (!handle) {
1156 ret = -ENOMEM;
1157 goto free_pcr;
1158 }
1159 handle->pcr = pcr;
1160
1161 idr_preload(GFP_KERNEL);
1162 spin_lock(&rtsx_pci_lock);
1163 ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1164 if (ret >= 0)
1165 pcr->id = ret;
1166 spin_unlock(&rtsx_pci_lock);
1167 idr_preload_end();
1168 if (ret < 0)
1169 goto free_handle;
1170
1171 pcr->pci = pcidev;
1172 dev_set_drvdata(&pcidev->dev, handle);
1173
1174 len = pci_resource_len(pcidev, 0);
1175 base = pci_resource_start(pcidev, 0);
1176 pcr->remap_addr = ioremap_nocache(base, len);
1177 if (!pcr->remap_addr) {
1178 ret = -ENOMEM;
1179 goto free_handle;
1180 }
1181
1182 pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1183 RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1184 GFP_KERNEL);
1185 if (pcr->rtsx_resv_buf == NULL) {
1186 ret = -ENXIO;
1187 goto unmap;
1188 }
1189 pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1190 pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1191 pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1192 pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1193
1194 pcr->card_inserted = 0;
1195 pcr->card_removed = 0;
1196 INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1197 INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1198
1199 pcr->msi_en = msi_en;
1200 if (pcr->msi_en) {
1201 ret = pci_enable_msi(pcidev);
1202 if (ret)
1203 pcr->msi_en = false;
1204 }
1205
1206 ret = rtsx_pci_acquire_irq(pcr);
1207 if (ret < 0)
1208 goto disable_msi;
1209
1210 pci_set_master(pcidev);
1211 synchronize_irq(pcr->irq);
1212
1213 ret = rtsx_pci_init_chip(pcr);
1214 if (ret < 0)
1215 goto disable_irq;
1216
1217 for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1218 rtsx_pcr_cells[i].platform_data = handle;
1219 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1220 }
1221 ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1222 ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1223 if (ret < 0)
1224 goto disable_irq;
1225
1226 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1227
1228 return 0;
1229
1230 disable_irq:
1231 free_irq(pcr->irq, (void *)pcr);
1232 disable_msi:
1233 if (pcr->msi_en)
1234 pci_disable_msi(pcr->pci);
1235 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1236 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1237 unmap:
1238 iounmap(pcr->remap_addr);
1239 free_handle:
1240 kfree(handle);
1241 free_pcr:
1242 kfree(pcr);
1243 release_pci:
1244 pci_release_regions(pcidev);
1245 disable:
1246 pci_disable_device(pcidev);
1247
1248 return ret;
1249 }
1250
rtsx_pci_remove(struct pci_dev * pcidev)1251 static void rtsx_pci_remove(struct pci_dev *pcidev)
1252 {
1253 struct pcr_handle *handle = pci_get_drvdata(pcidev);
1254 struct rtsx_pcr *pcr = handle->pcr;
1255
1256 pcr->remove_pci = true;
1257
1258 /* Disable interrupts at the pcr level */
1259 spin_lock_irq(&pcr->lock);
1260 rtsx_pci_writel(pcr, RTSX_BIER, 0);
1261 pcr->bier = 0;
1262 spin_unlock_irq(&pcr->lock);
1263
1264 cancel_delayed_work_sync(&pcr->carddet_work);
1265 cancel_delayed_work_sync(&pcr->idle_work);
1266
1267 mfd_remove_devices(&pcidev->dev);
1268
1269 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1270 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1271 free_irq(pcr->irq, (void *)pcr);
1272 if (pcr->msi_en)
1273 pci_disable_msi(pcr->pci);
1274 iounmap(pcr->remap_addr);
1275
1276 pci_release_regions(pcidev);
1277 pci_disable_device(pcidev);
1278
1279 spin_lock(&rtsx_pci_lock);
1280 idr_remove(&rtsx_pci_idr, pcr->id);
1281 spin_unlock(&rtsx_pci_lock);
1282
1283 kfree(pcr->slots);
1284 kfree(pcr);
1285 kfree(handle);
1286
1287 dev_dbg(&(pcidev->dev),
1288 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1289 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1290 }
1291
1292 #ifdef CONFIG_PM
1293
rtsx_pci_suspend(struct pci_dev * pcidev,pm_message_t state)1294 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1295 {
1296 struct pcr_handle *handle;
1297 struct rtsx_pcr *pcr;
1298
1299 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1300
1301 handle = pci_get_drvdata(pcidev);
1302 pcr = handle->pcr;
1303
1304 cancel_delayed_work(&pcr->carddet_work);
1305 cancel_delayed_work(&pcr->idle_work);
1306
1307 mutex_lock(&pcr->pcr_mutex);
1308
1309 rtsx_pci_power_off(pcr, HOST_ENTER_S3);
1310
1311 pci_save_state(pcidev);
1312 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1313 pci_disable_device(pcidev);
1314 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1315
1316 mutex_unlock(&pcr->pcr_mutex);
1317 return 0;
1318 }
1319
rtsx_pci_resume(struct pci_dev * pcidev)1320 static int rtsx_pci_resume(struct pci_dev *pcidev)
1321 {
1322 struct pcr_handle *handle;
1323 struct rtsx_pcr *pcr;
1324 int ret = 0;
1325
1326 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1327
1328 handle = pci_get_drvdata(pcidev);
1329 pcr = handle->pcr;
1330
1331 mutex_lock(&pcr->pcr_mutex);
1332
1333 pci_set_power_state(pcidev, PCI_D0);
1334 pci_restore_state(pcidev);
1335 ret = pci_enable_device(pcidev);
1336 if (ret)
1337 goto out;
1338 pci_set_master(pcidev);
1339
1340 ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1341 if (ret)
1342 goto out;
1343
1344 ret = rtsx_pci_init_hw(pcr);
1345 if (ret)
1346 goto out;
1347
1348 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1349
1350 out:
1351 mutex_unlock(&pcr->pcr_mutex);
1352 return ret;
1353 }
1354
rtsx_pci_shutdown(struct pci_dev * pcidev)1355 static void rtsx_pci_shutdown(struct pci_dev *pcidev)
1356 {
1357 struct pcr_handle *handle;
1358 struct rtsx_pcr *pcr;
1359
1360 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1361
1362 handle = pci_get_drvdata(pcidev);
1363 pcr = handle->pcr;
1364 rtsx_pci_power_off(pcr, HOST_ENTER_S1);
1365
1366 pci_disable_device(pcidev);
1367 }
1368
1369 #else /* CONFIG_PM */
1370
1371 #define rtsx_pci_suspend NULL
1372 #define rtsx_pci_resume NULL
1373 #define rtsx_pci_shutdown NULL
1374
1375 #endif /* CONFIG_PM */
1376
1377 static struct pci_driver rtsx_pci_driver = {
1378 .name = DRV_NAME_RTSX_PCI,
1379 .id_table = rtsx_pci_ids,
1380 .probe = rtsx_pci_probe,
1381 .remove = rtsx_pci_remove,
1382 .suspend = rtsx_pci_suspend,
1383 .resume = rtsx_pci_resume,
1384 .shutdown = rtsx_pci_shutdown,
1385 };
1386 module_pci_driver(rtsx_pci_driver);
1387
1388 MODULE_LICENSE("GPL");
1389 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1390 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");
1391