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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / misc / cardreader / rtsx_pcr.c
blob06038b325b023a815c277de89854536e495e3be6
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Driver for Realtek PCI-Express card reader
3 *
4 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
5 *
6 * Author:
7 * Wei WANG <wei_wang@realsil.com.cn>
8 */
9
10 #include <linux/pci.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/highmem.h>
15 #include <linux/interrupt.h>
16 #include <linux/delay.h>
17 #include <linux/idr.h>
18 #include <linux/platform_device.h>
19 #include <linux/mfd/core.h>
20 #include <linux/rtsx_pci.h>
21 #include <linux/mmc/card.h>
22 #include <asm/unaligned.h>
23
24 #include "rtsx_pcr.h"
25 #include "rts5261.h"
26
27 static bool msi_en = true;
28 module_param(msi_en, bool, S_IRUGO | S_IWUSR);
29 MODULE_PARM_DESC(msi_en, "Enable MSI");
30
31 static DEFINE_IDR(rtsx_pci_idr);
32 static DEFINE_SPINLOCK(rtsx_pci_lock);
33
34 static struct mfd_cell rtsx_pcr_cells[] = {
35 [RTSX_SD_CARD] = {
36 .name = DRV_NAME_RTSX_PCI_SDMMC,
37 },
38 };
39
40 static const struct pci_device_id rtsx_pci_ids[] = {
41 { PCI_DEVICE(0x10EC, 0x5209), PCI_CLASS_OTHERS << 16, 0xFF0000 },
42 { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
43 { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
44 { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
45 { PCI_DEVICE(0x10EC, 0x522A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
46 { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
47 { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
48 { PCI_DEVICE(0x10EC, 0x5286), PCI_CLASS_OTHERS << 16, 0xFF0000 },
49 { PCI_DEVICE(0x10EC, 0x524A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
50 { PCI_DEVICE(0x10EC, 0x525A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
51 { PCI_DEVICE(0x10EC, 0x5260), PCI_CLASS_OTHERS << 16, 0xFF0000 },
52 { PCI_DEVICE(0x10EC, 0x5261), PCI_CLASS_OTHERS << 16, 0xFF0000 },
53 { 0, }
54 };
55
56 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
57
58 static inline void rtsx_pci_enable_aspm(struct rtsx_pcr *pcr)
59 {
60 rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
61 0xFC, pcr->aspm_en);
62 }
63
64 static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
65 {
66 rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
67 0xFC, 0);
68 }
69
70 static int rtsx_comm_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
71 {
72 rtsx_pci_write_register(pcr, MSGTXDATA0,
73 MASK_8_BIT_DEF, (u8) (latency & 0xFF));
74 rtsx_pci_write_register(pcr, MSGTXDATA1,
75 MASK_8_BIT_DEF, (u8)((latency >> 8) & 0xFF));
76 rtsx_pci_write_register(pcr, MSGTXDATA2,
77 MASK_8_BIT_DEF, (u8)((latency >> 16) & 0xFF));
78 rtsx_pci_write_register(pcr, MSGTXDATA3,
79 MASK_8_BIT_DEF, (u8)((latency >> 24) & 0xFF));
80 rtsx_pci_write_register(pcr, LTR_CTL, LTR_TX_EN_MASK |
81 LTR_LATENCY_MODE_MASK, LTR_TX_EN_1 | LTR_LATENCY_MODE_SW);
82
83 return 0;
84 }
85
86 int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
87 {
88 if (pcr->ops->set_ltr_latency)
89 return pcr->ops->set_ltr_latency(pcr, latency);
90 else
91 return rtsx_comm_set_ltr_latency(pcr, latency);
92 }
93
94 static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
95 {
96 struct rtsx_cr_option *option = &pcr->option;
97
98 if (pcr->aspm_enabled == enable)
99 return;
100
101 if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
102 if (enable)
103 rtsx_pci_enable_aspm(pcr);
104 else
105 rtsx_pci_disable_aspm(pcr);
106 } else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
107 u8 mask = FORCE_ASPM_VAL_MASK;
108 u8 val = 0;
109
110 if (enable)
111 val = pcr->aspm_en;
112 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
113 }
114
115 pcr->aspm_enabled = enable;
116 }
117
118 static void rtsx_disable_aspm(struct rtsx_pcr *pcr)
119 {
120 if (pcr->ops->set_aspm)
121 pcr->ops->set_aspm(pcr, false);
122 else
123 rtsx_comm_set_aspm(pcr, false);
124 }
125
126 int rtsx_set_l1off_sub(struct rtsx_pcr *pcr, u8 val)
127 {
128 rtsx_pci_write_register(pcr, L1SUB_CONFIG3, 0xFF, val);
129
130 return 0;
131 }
132
133 static void rtsx_set_l1off_sub_cfg_d0(struct rtsx_pcr *pcr, int active)
134 {
135 if (pcr->ops->set_l1off_cfg_sub_d0)
136 pcr->ops->set_l1off_cfg_sub_d0(pcr, active);
137 }
138
139 static void rtsx_comm_pm_full_on(struct rtsx_pcr *pcr)
140 {
141 struct rtsx_cr_option *option = &pcr->option;
142
143 rtsx_disable_aspm(pcr);
144
145 if (option->ltr_enabled)
146 rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
147
148 if (rtsx_check_dev_flag(pcr, LTR_L1SS_PWR_GATE_EN))
149 rtsx_set_l1off_sub_cfg_d0(pcr, 1);
150 }
151
152 static void rtsx_pm_full_on(struct rtsx_pcr *pcr)
153 {
154 if (pcr->ops->full_on)
155 pcr->ops->full_on(pcr);
156 else
157 rtsx_comm_pm_full_on(pcr);
158 }
159
160 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
161 {
162 /* If pci device removed, don't queue idle work any more */
163 if (pcr->remove_pci)
164 return;
165
166 if (pcr->state != PDEV_STAT_RUN) {
167 pcr->state = PDEV_STAT_RUN;
168 if (pcr->ops->enable_auto_blink)
169 pcr->ops->enable_auto_blink(pcr);
170 rtsx_pm_full_on(pcr);
171 }
172
173 mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
174 }
175 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
176
177 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
178 {
179 int i;
180 u32 val = HAIMR_WRITE_START;
181
182 val |= (u32)(addr & 0x3FFF) << 16;
183 val |= (u32)mask << 8;
184 val |= (u32)data;
185
186 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
187
188 for (i = 0; i < MAX_RW_REG_CNT; i++) {
189 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
190 if ((val & HAIMR_TRANS_END) == 0) {
191 if (data != (u8)val)
192 return -EIO;
193 return 0;
194 }
195 }
196
197 return -ETIMEDOUT;
198 }
199 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
200
201 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
202 {
203 u32 val = HAIMR_READ_START;
204 int i;
205
206 val |= (u32)(addr & 0x3FFF) << 16;
207 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
208
209 for (i = 0; i < MAX_RW_REG_CNT; i++) {
210 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
211 if ((val & HAIMR_TRANS_END) == 0)
212 break;
213 }
214
215 if (i >= MAX_RW_REG_CNT)
216 return -ETIMEDOUT;
217
218 if (data)
219 *data = (u8)(val & 0xFF);
220
221 return 0;
222 }
223 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
224
225 int __rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
226 {
227 int err, i, finished = 0;
228 u8 tmp;
229
230 rtsx_pci_init_cmd(pcr);
231
232 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
233 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
234 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
235 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
236
237 err = rtsx_pci_send_cmd(pcr, 100);
238 if (err < 0)
239 return err;
240
241 for (i = 0; i < 100000; i++) {
242 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
243 if (err < 0)
244 return err;
245
246 if (!(tmp & 0x80)) {
247 finished = 1;
248 break;
249 }
250 }
251
252 if (!finished)
253 return -ETIMEDOUT;
254
255 return 0;
256 }
257
258 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
259 {
260 if (pcr->ops->write_phy)
261 return pcr->ops->write_phy(pcr, addr, val);
262
263 return __rtsx_pci_write_phy_register(pcr, addr, val);
264 }
265 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
266
267 int __rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
268 {
269 int err, i, finished = 0;
270 u16 data;
271 u8 *ptr, tmp;
272
273 rtsx_pci_init_cmd(pcr);
274
275 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
276 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
277
278 err = rtsx_pci_send_cmd(pcr, 100);
279 if (err < 0)
280 return err;
281
282 for (i = 0; i < 100000; i++) {
283 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
284 if (err < 0)
285 return err;
286
287 if (!(tmp & 0x80)) {
288 finished = 1;
289 break;
290 }
291 }
292
293 if (!finished)
294 return -ETIMEDOUT;
295
296 rtsx_pci_init_cmd(pcr);
297
298 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
299 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
300
301 err = rtsx_pci_send_cmd(pcr, 100);
302 if (err < 0)
303 return err;
304
305 ptr = rtsx_pci_get_cmd_data(pcr);
306 data = ((u16)ptr[1] << 8) | ptr[0];
307
308 if (val)
309 *val = data;
310
311 return 0;
312 }
313
314 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
315 {
316 if (pcr->ops->read_phy)
317 return pcr->ops->read_phy(pcr, addr, val);
318
319 return __rtsx_pci_read_phy_register(pcr, addr, val);
320 }
321 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
322
323 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
324 {
325 if (pcr->ops->stop_cmd)
326 return pcr->ops->stop_cmd(pcr);
327
328 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
329 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
330
331 rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
332 rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
333 }
334 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
335
336 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
337 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
338 {
339 unsigned long flags;
340 u32 val = 0;
341 u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
342
343 val |= (u32)(cmd_type & 0x03) << 30;
344 val |= (u32)(reg_addr & 0x3FFF) << 16;
345 val |= (u32)mask << 8;
346 val |= (u32)data;
347
348 spin_lock_irqsave(&pcr->lock, flags);
349 ptr += pcr->ci;
350 if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
351 put_unaligned_le32(val, ptr);
352 ptr++;
353 pcr->ci++;
354 }
355 spin_unlock_irqrestore(&pcr->lock, flags);
356 }
357 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
358
359 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
360 {
361 u32 val = 1 << 31;
362
363 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
364
365 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
366 /* Hardware Auto Response */
367 val |= 0x40000000;
368 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
369 }
370 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
371
372 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
373 {
374 struct completion trans_done;
375 u32 val = 1 << 31;
376 long timeleft;
377 unsigned long flags;
378 int err = 0;
379
380 spin_lock_irqsave(&pcr->lock, flags);
381
382 /* set up data structures for the wakeup system */
383 pcr->done = &trans_done;
384 pcr->trans_result = TRANS_NOT_READY;
385 init_completion(&trans_done);
386
387 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
388
389 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
390 /* Hardware Auto Response */
391 val |= 0x40000000;
392 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
393
394 spin_unlock_irqrestore(&pcr->lock, flags);
395
396 /* Wait for TRANS_OK_INT */
397 timeleft = wait_for_completion_interruptible_timeout(
398 &trans_done, msecs_to_jiffies(timeout));
399 if (timeleft <= 0) {
400 pcr_dbg(pcr, "Timeout (%s %d)\n", __func__, __LINE__);
401 err = -ETIMEDOUT;
402 goto finish_send_cmd;
403 }
404
405 spin_lock_irqsave(&pcr->lock, flags);
406 if (pcr->trans_result == TRANS_RESULT_FAIL)
407 err = -EINVAL;
408 else if (pcr->trans_result == TRANS_RESULT_OK)
409 err = 0;
410 else if (pcr->trans_result == TRANS_NO_DEVICE)
411 err = -ENODEV;
412 spin_unlock_irqrestore(&pcr->lock, flags);
413
414 finish_send_cmd:
415 spin_lock_irqsave(&pcr->lock, flags);
416 pcr->done = NULL;
417 spin_unlock_irqrestore(&pcr->lock, flags);
418
419 if ((err < 0) && (err != -ENODEV))
420 rtsx_pci_stop_cmd(pcr);
421
422 if (pcr->finish_me)
423 complete(pcr->finish_me);
424
425 return err;
426 }
427 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
428
429 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
430 dma_addr_t addr, unsigned int len, int end)
431 {
432 u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
433 u64 val;
434 u8 option = RTSX_SG_VALID | RTSX_SG_TRANS_DATA;
435
436 pcr_dbg(pcr, "DMA addr: 0x%x, Len: 0x%x\n", (unsigned int)addr, len);
437
438 if (end)
439 option |= RTSX_SG_END;
440
441 if (PCI_PID(pcr) == PID_5261) {
442 if (len > 0xFFFF)
443 val = ((u64)addr << 32) | (((u64)len & 0xFFFF) << 16)
444 | (((u64)len >> 16) << 6) | option;
445 else
446 val = ((u64)addr << 32) | ((u64)len << 16) | option;
447 } else {
448 val = ((u64)addr << 32) | ((u64)len << 12) | option;
449 }
450 put_unaligned_le64(val, ptr);
451 pcr->sgi++;
452 }
453
454 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
455 int num_sg, bool read, int timeout)
456 {
457 int err = 0, count;
458
459 pcr_dbg(pcr, "--> %s: num_sg = %d\n", __func__, num_sg);
460 count = rtsx_pci_dma_map_sg(pcr, sglist, num_sg, read);
461 if (count < 1)
462 return -EINVAL;
463 pcr_dbg(pcr, "DMA mapping count: %d\n", count);
464
465 err = rtsx_pci_dma_transfer(pcr, sglist, count, read, timeout);
466
467 rtsx_pci_dma_unmap_sg(pcr, sglist, num_sg, read);
468
469 return err;
470 }
471 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
472
473 int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
474 int num_sg, bool read)
475 {
476 enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
477
478 if (pcr->remove_pci)
479 return -EINVAL;
480
481 if ((sglist == NULL) || (num_sg <= 0))
482 return -EINVAL;
483
484 return dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dir);
485 }
486 EXPORT_SYMBOL_GPL(rtsx_pci_dma_map_sg);
487
488 void rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
489 int num_sg, bool read)
490 {
491 enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
492
493 dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dir);
494 }
495 EXPORT_SYMBOL_GPL(rtsx_pci_dma_unmap_sg);
496
497 int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist,
498 int count, bool read, int timeout)
499 {
500 struct completion trans_done;
501 struct scatterlist *sg;
502 dma_addr_t addr;
503 long timeleft;
504 unsigned long flags;
505 unsigned int len;
506 int i, err = 0;
507 u32 val;
508 u8 dir = read ? DEVICE_TO_HOST : HOST_TO_DEVICE;
509
510 if (pcr->remove_pci)
511 return -ENODEV;
512
513 if ((sglist == NULL) || (count < 1))
514 return -EINVAL;
515
516 val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
517 pcr->sgi = 0;
518 for_each_sg(sglist, sg, count, i) {
519 addr = sg_dma_address(sg);
520 len = sg_dma_len(sg);
521 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
522 }
523
524 spin_lock_irqsave(&pcr->lock, flags);
525
526 pcr->done = &trans_done;
527 pcr->trans_result = TRANS_NOT_READY;
528 init_completion(&trans_done);
529 rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
530 rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
531
532 spin_unlock_irqrestore(&pcr->lock, flags);
533
534 timeleft = wait_for_completion_interruptible_timeout(
535 &trans_done, msecs_to_jiffies(timeout));
536 if (timeleft <= 0) {
537 pcr_dbg(pcr, "Timeout (%s %d)\n", __func__, __LINE__);
538 err = -ETIMEDOUT;
539 goto out;
540 }
541
542 spin_lock_irqsave(&pcr->lock, flags);
543 if (pcr->trans_result == TRANS_RESULT_FAIL) {
544 err = -EILSEQ;
545 if (pcr->dma_error_count < RTS_MAX_TIMES_FREQ_REDUCTION)
546 pcr->dma_error_count++;
547 }
548
549 else if (pcr->trans_result == TRANS_NO_DEVICE)
550 err = -ENODEV;
551 spin_unlock_irqrestore(&pcr->lock, flags);
552
553 out:
554 spin_lock_irqsave(&pcr->lock, flags);
555 pcr->done = NULL;
556 spin_unlock_irqrestore(&pcr->lock, flags);
557
558 if ((err < 0) && (err != -ENODEV))
559 rtsx_pci_stop_cmd(pcr);
560
561 if (pcr->finish_me)
562 complete(pcr->finish_me);
563
564 return err;
565 }
566 EXPORT_SYMBOL_GPL(rtsx_pci_dma_transfer);
567
568 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
569 {
570 int err;
571 int i, j;
572 u16 reg;
573 u8 *ptr;
574
575 if (buf_len > 512)
576 buf_len = 512;
577
578 ptr = buf;
579 reg = PPBUF_BASE2;
580 for (i = 0; i < buf_len / 256; i++) {
581 rtsx_pci_init_cmd(pcr);
582
583 for (j = 0; j < 256; j++)
584 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
585
586 err = rtsx_pci_send_cmd(pcr, 250);
587 if (err < 0)
588 return err;
589
590 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
591 ptr += 256;
592 }
593
594 if (buf_len % 256) {
595 rtsx_pci_init_cmd(pcr);
596
597 for (j = 0; j < buf_len % 256; j++)
598 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
599
600 err = rtsx_pci_send_cmd(pcr, 250);
601 if (err < 0)
602 return err;
603 }
604
605 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
606
607 return 0;
608 }
609 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
610
611 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
612 {
613 int err;
614 int i, j;
615 u16 reg;
616 u8 *ptr;
617
618 if (buf_len > 512)
619 buf_len = 512;
620
621 ptr = buf;
622 reg = PPBUF_BASE2;
623 for (i = 0; i < buf_len / 256; i++) {
624 rtsx_pci_init_cmd(pcr);
625
626 for (j = 0; j < 256; j++) {
627 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
628 reg++, 0xFF, *ptr);
629 ptr++;
630 }
631
632 err = rtsx_pci_send_cmd(pcr, 250);
633 if (err < 0)
634 return err;
635 }
636
637 if (buf_len % 256) {
638 rtsx_pci_init_cmd(pcr);
639
640 for (j = 0; j < buf_len % 256; j++) {
641 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
642 reg++, 0xFF, *ptr);
643 ptr++;
644 }
645
646 err = rtsx_pci_send_cmd(pcr, 250);
647 if (err < 0)
648 return err;
649 }
650
651 return 0;
652 }
653 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
654
655 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
656 {
657 rtsx_pci_init_cmd(pcr);
658
659 while (*tbl & 0xFFFF0000) {
660 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
661 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
662 tbl++;
663 }
664
665 return rtsx_pci_send_cmd(pcr, 100);
666 }
667
668 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
669 {
670 const u32 *tbl;
671
672 if (card == RTSX_SD_CARD)
673 tbl = pcr->sd_pull_ctl_enable_tbl;
674 else if (card == RTSX_MS_CARD)
675 tbl = pcr->ms_pull_ctl_enable_tbl;
676 else
677 return -EINVAL;
678
679 return rtsx_pci_set_pull_ctl(pcr, tbl);
680 }
681 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
682
683 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
684 {
685 const u32 *tbl;
686
687 if (card == RTSX_SD_CARD)
688 tbl = pcr->sd_pull_ctl_disable_tbl;
689 else if (card == RTSX_MS_CARD)
690 tbl = pcr->ms_pull_ctl_disable_tbl;
691 else
692 return -EINVAL;
693
694 return rtsx_pci_set_pull_ctl(pcr, tbl);
695 }
696 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
697
698 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
699 {
700 struct rtsx_hw_param *hw_param = &pcr->hw_param;
701
702 pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN
703 | hw_param->interrupt_en;
704
705 if (pcr->num_slots > 1)
706 pcr->bier |= MS_INT_EN;
707
708 /* Enable Bus Interrupt */
709 rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
710
711 pcr_dbg(pcr, "RTSX_BIER: 0x%08x\n", pcr->bier);
712 }
713
714 static inline u8 double_ssc_depth(u8 depth)
715 {
716 return ((depth > 1) ? (depth - 1) : depth);
717 }
718
719 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
720 {
721 if (div > CLK_DIV_1) {
722 if (ssc_depth > (div - 1))
723 ssc_depth -= (div - 1);
724 else
725 ssc_depth = SSC_DEPTH_4M;
726 }
727
728 return ssc_depth;
729 }
730
731 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
732 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
733 {
734 int err, clk;
735 u8 n, clk_divider, mcu_cnt, div;
736 static const u8 depth[] = {
737 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
738 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
739 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
740 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
741 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
742 };
743
744 if (PCI_PID(pcr) == PID_5261)
745 return rts5261_pci_switch_clock(pcr, card_clock,
746 ssc_depth, initial_mode, double_clk, vpclk);
747
748 if (initial_mode) {
749 /* We use 250k(around) here, in initial stage */
750 clk_divider = SD_CLK_DIVIDE_128;
751 card_clock = 30000000;
752 } else {
753 clk_divider = SD_CLK_DIVIDE_0;
754 }
755 err = rtsx_pci_write_register(pcr, SD_CFG1,
756 SD_CLK_DIVIDE_MASK, clk_divider);
757 if (err < 0)
758 return err;
759
760 /* Reduce card clock by 20MHz each time a DMA transfer error occurs */
761 if (card_clock == UHS_SDR104_MAX_DTR &&
762 pcr->dma_error_count &&
763 PCI_PID(pcr) == RTS5227_DEVICE_ID)
764 card_clock = UHS_SDR104_MAX_DTR -
765 (pcr->dma_error_count * 20000000);
766
767 card_clock /= 1000000;
768 pcr_dbg(pcr, "Switch card clock to %dMHz\n", card_clock);
769
770 clk = card_clock;
771 if (!initial_mode && double_clk)
772 clk = card_clock * 2;
773 pcr_dbg(pcr, "Internal SSC clock: %dMHz (cur_clock = %d)\n",
774 clk, pcr->cur_clock);
775
776 if (clk == pcr->cur_clock)
777 return 0;
778
779 if (pcr->ops->conv_clk_and_div_n)
780 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
781 else
782 n = (u8)(clk - 2);
783 if ((clk <= 2) || (n > MAX_DIV_N_PCR))
784 return -EINVAL;
785
786 mcu_cnt = (u8)(125/clk + 3);
787 if (mcu_cnt > 15)
788 mcu_cnt = 15;
789
790 /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
791 div = CLK_DIV_1;
792 while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
793 if (pcr->ops->conv_clk_and_div_n) {
794 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
795 DIV_N_TO_CLK) * 2;
796 n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
797 CLK_TO_DIV_N);
798 } else {
799 n = (n + 2) * 2 - 2;
800 }
801 div++;
802 }
803 pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
804
805 ssc_depth = depth[ssc_depth];
806 if (double_clk)
807 ssc_depth = double_ssc_depth(ssc_depth);
808
809 ssc_depth = revise_ssc_depth(ssc_depth, div);
810 pcr_dbg(pcr, "ssc_depth = %d\n", ssc_depth);
811
812 rtsx_pci_init_cmd(pcr);
813 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
814 CLK_LOW_FREQ, CLK_LOW_FREQ);
815 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
816 0xFF, (div << 4) | mcu_cnt);
817 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
818 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
819 SSC_DEPTH_MASK, ssc_depth);
820 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
821 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
822 if (vpclk) {
823 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
824 PHASE_NOT_RESET, 0);
825 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
826 PHASE_NOT_RESET, PHASE_NOT_RESET);
827 }
828
829 err = rtsx_pci_send_cmd(pcr, 2000);
830 if (err < 0)
831 return err;
832
833 /* Wait SSC clock stable */
834 udelay(SSC_CLOCK_STABLE_WAIT);
835 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
836 if (err < 0)
837 return err;
838
839 pcr->cur_clock = clk;
840 return 0;
841 }
842 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
843
844 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
845 {
846 if (pcr->ops->card_power_on)
847 return pcr->ops->card_power_on(pcr, card);
848
849 return 0;
850 }
851 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
852
853 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
854 {
855 if (pcr->ops->card_power_off)
856 return pcr->ops->card_power_off(pcr, card);
857
858 return 0;
859 }
860 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
861
862 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
863 {
864 static const unsigned int cd_mask[] = {
865 [RTSX_SD_CARD] = SD_EXIST,
866 [RTSX_MS_CARD] = MS_EXIST
867 };
868
869 if (!(pcr->flags & PCR_MS_PMOS)) {
870 /* When using single PMOS, accessing card is not permitted
871 * if the existing card is not the designated one.
872 */
873 if (pcr->card_exist & (~cd_mask[card]))
874 return -EIO;
875 }
876
877 return 0;
878 }
879 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
880
881 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
882 {
883 if (pcr->ops->switch_output_voltage)
884 return pcr->ops->switch_output_voltage(pcr, voltage);
885
886 return 0;
887 }
888 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
889
890 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
891 {
892 unsigned int val;
893
894 val = rtsx_pci_readl(pcr, RTSX_BIPR);
895 if (pcr->ops->cd_deglitch)
896 val = pcr->ops->cd_deglitch(pcr);
897
898 return val;
899 }
900 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
901
902 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
903 {
904 struct completion finish;
905
906 pcr->finish_me = &finish;
907 init_completion(&finish);
908
909 if (pcr->done)
910 complete(pcr->done);
911
912 if (!pcr->remove_pci)
913 rtsx_pci_stop_cmd(pcr);
914
915 wait_for_completion_interruptible_timeout(&finish,
916 msecs_to_jiffies(2));
917 pcr->finish_me = NULL;
918 }
919 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
920
921 static void rtsx_pci_card_detect(struct work_struct *work)
922 {
923 struct delayed_work *dwork;
924 struct rtsx_pcr *pcr;
925 unsigned long flags;
926 unsigned int card_detect = 0, card_inserted, card_removed;
927 u32 irq_status;
928
929 dwork = to_delayed_work(work);
930 pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
931
932 pcr_dbg(pcr, "--> %s\n", __func__);
933
934 mutex_lock(&pcr->pcr_mutex);
935 spin_lock_irqsave(&pcr->lock, flags);
936
937 irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
938 pcr_dbg(pcr, "irq_status: 0x%08x\n", irq_status);
939
940 irq_status &= CARD_EXIST;
941 card_inserted = pcr->card_inserted & irq_status;
942 card_removed = pcr->card_removed;
943 pcr->card_inserted = 0;
944 pcr->card_removed = 0;
945
946 spin_unlock_irqrestore(&pcr->lock, flags);
947
948 if (card_inserted || card_removed) {
949 pcr_dbg(pcr, "card_inserted: 0x%x, card_removed: 0x%x\n",
950 card_inserted, card_removed);
951
952 if (pcr->ops->cd_deglitch)
953 card_inserted = pcr->ops->cd_deglitch(pcr);
954
955 card_detect = card_inserted | card_removed;
956
957 pcr->card_exist |= card_inserted;
958 pcr->card_exist &= ~card_removed;
959 }
960
961 mutex_unlock(&pcr->pcr_mutex);
962
963 if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
964 pcr->slots[RTSX_SD_CARD].card_event(
965 pcr->slots[RTSX_SD_CARD].p_dev);
966 if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
967 pcr->slots[RTSX_MS_CARD].card_event(
968 pcr->slots[RTSX_MS_CARD].p_dev);
969 }
970
971 static void rtsx_pci_process_ocp(struct rtsx_pcr *pcr)
972 {
973 if (pcr->ops->process_ocp) {
974 pcr->ops->process_ocp(pcr);
975 } else {
976 if (!pcr->option.ocp_en)
977 return;
978 rtsx_pci_get_ocpstat(pcr, &pcr->ocp_stat);
979 if (pcr->ocp_stat & (SD_OC_NOW | SD_OC_EVER)) {
980 rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
981 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, 0);
982 rtsx_pci_clear_ocpstat(pcr);
983 pcr->ocp_stat = 0;
984 }
985 }
986 }
987
988 static int rtsx_pci_process_ocp_interrupt(struct rtsx_pcr *pcr)
989 {
990 if (pcr->option.ocp_en)
991 rtsx_pci_process_ocp(pcr);
992
993 return 0;
994 }
995
996 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
997 {
998 struct rtsx_pcr *pcr = dev_id;
999 u32 int_reg;
1000
1001 if (!pcr)
1002 return IRQ_NONE;
1003
1004 spin_lock(&pcr->lock);
1005
1006 int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
1007 /* Clear interrupt flag */
1008 rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
1009 if ((int_reg & pcr->bier) == 0) {
1010 spin_unlock(&pcr->lock);
1011 return IRQ_NONE;
1012 }
1013 if (int_reg == 0xFFFFFFFF) {
1014 spin_unlock(&pcr->lock);
1015 return IRQ_HANDLED;
1016 }
1017
1018 int_reg &= (pcr->bier | 0x7FFFFF);
1019
1020 if (int_reg & SD_OC_INT)
1021 rtsx_pci_process_ocp_interrupt(pcr);
1022
1023 if (int_reg & SD_INT) {
1024 if (int_reg & SD_EXIST) {
1025 pcr->card_inserted |= SD_EXIST;
1026 } else {
1027 pcr->card_removed |= SD_EXIST;
1028 pcr->card_inserted &= ~SD_EXIST;
1029 }
1030 pcr->dma_error_count = 0;
1031 }
1032
1033 if (int_reg & MS_INT) {
1034 if (int_reg & MS_EXIST) {
1035 pcr->card_inserted |= MS_EXIST;
1036 } else {
1037 pcr->card_removed |= MS_EXIST;
1038 pcr->card_inserted &= ~MS_EXIST;
1039 }
1040 }
1041
1042 if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
1043 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
1044 pcr->trans_result = TRANS_RESULT_FAIL;
1045 if (pcr->done)
1046 complete(pcr->done);
1047 } else if (int_reg & TRANS_OK_INT) {
1048 pcr->trans_result = TRANS_RESULT_OK;
1049 if (pcr->done)
1050 complete(pcr->done);
1051 }
1052 }
1053
1054 if ((pcr->card_inserted || pcr->card_removed) && !(int_reg & SD_OC_INT))
1055 schedule_delayed_work(&pcr->carddet_work,
1056 msecs_to_jiffies(200));
1057
1058 spin_unlock(&pcr->lock);
1059 return IRQ_HANDLED;
1060 }
1061
1062 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
1063 {
1064 pcr_dbg(pcr, "%s: pcr->msi_en = %d, pci->irq = %d\n",
1065 __func__, pcr->msi_en, pcr->pci->irq);
1066
1067 if (request_irq(pcr->pci->irq, rtsx_pci_isr,
1068 pcr->msi_en ? 0 : IRQF_SHARED,
1069 DRV_NAME_RTSX_PCI, pcr)) {
1070 dev_err(&(pcr->pci->dev),
1071 "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
1072 pcr->pci->irq);
1073 return -1;
1074 }
1075
1076 pcr->irq = pcr->pci->irq;
1077 pci_intx(pcr->pci, !pcr->msi_en);
1078
1079 return 0;
1080 }
1081
1082 static void rtsx_enable_aspm(struct rtsx_pcr *pcr)
1083 {
1084 if (pcr->ops->set_aspm)
1085 pcr->ops->set_aspm(pcr, true);
1086 else
1087 rtsx_comm_set_aspm(pcr, true);
1088 }
1089
1090 static void rtsx_comm_pm_power_saving(struct rtsx_pcr *pcr)
1091 {
1092 struct rtsx_cr_option *option = &pcr->option;
1093
1094 if (option->ltr_enabled) {
1095 u32 latency = option->ltr_l1off_latency;
1096
1097 if (rtsx_check_dev_flag(pcr, L1_SNOOZE_TEST_EN))
1098 mdelay(option->l1_snooze_delay);
1099
1100 rtsx_set_ltr_latency(pcr, latency);
1101 }
1102
1103 if (rtsx_check_dev_flag(pcr, LTR_L1SS_PWR_GATE_EN))
1104 rtsx_set_l1off_sub_cfg_d0(pcr, 0);
1105
1106 rtsx_enable_aspm(pcr);
1107 }
1108
1109 static void rtsx_pm_power_saving(struct rtsx_pcr *pcr)
1110 {
1111 if (pcr->ops->power_saving)
1112 pcr->ops->power_saving(pcr);
1113 else
1114 rtsx_comm_pm_power_saving(pcr);
1115 }
1116
1117 static void rtsx_pci_idle_work(struct work_struct *work)
1118 {
1119 struct delayed_work *dwork = to_delayed_work(work);
1120 struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
1121
1122 pcr_dbg(pcr, "--> %s\n", __func__);
1123
1124 mutex_lock(&pcr->pcr_mutex);
1125
1126 pcr->state = PDEV_STAT_IDLE;
1127
1128 if (pcr->ops->disable_auto_blink)
1129 pcr->ops->disable_auto_blink(pcr);
1130 if (pcr->ops->turn_off_led)
1131 pcr->ops->turn_off_led(pcr);
1132
1133 rtsx_pm_power_saving(pcr);
1134
1135 mutex_unlock(&pcr->pcr_mutex);
1136 }
1137
1138 #ifdef CONFIG_PM
1139 static void rtsx_pci_power_off(struct rtsx_pcr *pcr, u8 pm_state)
1140 {
1141 if (pcr->ops->turn_off_led)
1142 pcr->ops->turn_off_led(pcr);
1143
1144 rtsx_pci_writel(pcr, RTSX_BIER, 0);
1145 pcr->bier = 0;
1146
1147 rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
1148 rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, pm_state);
1149
1150 if (pcr->ops->force_power_down)
1151 pcr->ops->force_power_down(pcr, pm_state);
1152 }
1153 #endif
1154
1155 void rtsx_pci_enable_ocp(struct rtsx_pcr *pcr)
1156 {
1157 u8 val = SD_OCP_INT_EN | SD_DETECT_EN;
1158
1159 if (pcr->ops->enable_ocp) {
1160 pcr->ops->enable_ocp(pcr);
1161 } else {
1162 rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN, 0);
1163 rtsx_pci_write_register(pcr, REG_OCPCTL, 0xFF, val);
1164 }
1165
1166 }
1167
1168 void rtsx_pci_disable_ocp(struct rtsx_pcr *pcr)
1169 {
1170 u8 mask = SD_OCP_INT_EN | SD_DETECT_EN;
1171
1172 if (pcr->ops->disable_ocp) {
1173 pcr->ops->disable_ocp(pcr);
1174 } else {
1175 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
1176 rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN,
1177 OC_POWER_DOWN);
1178 }
1179 }
1180
1181 void rtsx_pci_init_ocp(struct rtsx_pcr *pcr)
1182 {
1183 if (pcr->ops->init_ocp) {
1184 pcr->ops->init_ocp(pcr);
1185 } else {
1186 struct rtsx_cr_option *option = &(pcr->option);
1187
1188 if (option->ocp_en) {
1189 u8 val = option->sd_800mA_ocp_thd;
1190
1191 rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN, 0);
1192 rtsx_pci_write_register(pcr, REG_OCPPARA1,
1193 SD_OCP_TIME_MASK, SD_OCP_TIME_800);
1194 rtsx_pci_write_register(pcr, REG_OCPPARA2,
1195 SD_OCP_THD_MASK, val);
1196 rtsx_pci_write_register(pcr, REG_OCPGLITCH,
1197 SD_OCP_GLITCH_MASK, pcr->hw_param.ocp_glitch);
1198 rtsx_pci_enable_ocp(pcr);
1199 } else {
1200 /* OC power down */
1201 rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN,
1202 OC_POWER_DOWN);
1203 }
1204 }
1205 }
1206
1207 int rtsx_pci_get_ocpstat(struct rtsx_pcr *pcr, u8 *val)
1208 {
1209 if (pcr->ops->get_ocpstat)
1210 return pcr->ops->get_ocpstat(pcr, val);
1211 else
1212 return rtsx_pci_read_register(pcr, REG_OCPSTAT, val);
1213 }
1214
1215 void rtsx_pci_clear_ocpstat(struct rtsx_pcr *pcr)
1216 {
1217 if (pcr->ops->clear_ocpstat) {
1218 pcr->ops->clear_ocpstat(pcr);
1219 } else {
1220 u8 mask = SD_OCP_INT_CLR | SD_OC_CLR;
1221 u8 val = SD_OCP_INT_CLR | SD_OC_CLR;
1222
1223 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, val);
1224 udelay(100);
1225 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
1226 }
1227 }
1228
1229 int rtsx_sd_power_off_card3v3(struct rtsx_pcr *pcr)
1230 {
1231 rtsx_pci_write_register(pcr, CARD_CLK_EN, SD_CLK_EN |
1232 MS_CLK_EN | SD40_CLK_EN, 0);
1233 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, 0);
1234 rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
1235
1236 msleep(50);
1237
1238 rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
1239
1240 return 0;
1241 }
1242
1243 int rtsx_ms_power_off_card3v3(struct rtsx_pcr *pcr)
1244 {
1245 rtsx_pci_write_register(pcr, CARD_CLK_EN, SD_CLK_EN |
1246 MS_CLK_EN | SD40_CLK_EN, 0);
1247
1248 rtsx_pci_card_pull_ctl_disable(pcr, RTSX_MS_CARD);
1249
1250 rtsx_pci_write_register(pcr, CARD_OE, MS_OUTPUT_EN, 0);
1251 rtsx_pci_card_power_off(pcr, RTSX_MS_CARD);
1252
1253 return 0;
1254 }
1255
1256 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
1257 {
1258 int err;
1259
1260 pcr->pcie_cap = pci_find_capability(pcr->pci, PCI_CAP_ID_EXP);
1261 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
1262
1263 rtsx_pci_enable_bus_int(pcr);
1264
1265 /* Power on SSC */
1266 if (PCI_PID(pcr) == PID_5261) {
1267 /* Gating real mcu clock */
1268 err = rtsx_pci_write_register(pcr, RTS5261_FW_CFG1,
1269 RTS5261_MCU_CLOCK_GATING, 0);
1270 err = rtsx_pci_write_register(pcr, RTS5261_REG_FPDCTL,
1271 SSC_POWER_DOWN, 0);
1272 } else {
1273 err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
1274 }
1275 if (err < 0)
1276 return err;
1277
1278 /* Wait SSC power stable */
1279 udelay(200);
1280
1281 rtsx_pci_disable_aspm(pcr);
1282 if (pcr->ops->optimize_phy) {
1283 err = pcr->ops->optimize_phy(pcr);
1284 if (err < 0)
1285 return err;
1286 }
1287
1288 rtsx_pci_init_cmd(pcr);
1289
1290 /* Set mcu_cnt to 7 to ensure data can be sampled properly */
1291 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
1292
1293 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
1294 /* Disable card clock */
1295 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
1296 /* Reset delink mode */
1297 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
1298 /* Card driving select */
1299 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DRIVE_SEL,
1300 0xFF, pcr->card_drive_sel);
1301 /* Enable SSC Clock */
1302 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
1303 0xFF, SSC_8X_EN | SSC_SEL_4M);
1304 if (PCI_PID(pcr) == PID_5261)
1305 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF,
1306 RTS5261_SSC_DEPTH_2M);
1307 else
1308 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
1309
1310 /* Disable cd_pwr_save */
1311 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
1312 /* Clear Link Ready Interrupt */
1313 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
1314 LINK_RDY_INT, LINK_RDY_INT);
1315 /* Enlarge the estimation window of PERST# glitch
1316 * to reduce the chance of invalid card interrupt
1317 */
1318 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
1319 /* Update RC oscillator to 400k
1320 * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
1321 * 1: 2M 0: 400k
1322 */
1323 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
1324 /* Set interrupt write clear
1325 * bit 1: U_elbi_if_rd_clr_en
1326 * 1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
1327 * 0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
1328 */
1329 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
1330
1331 err = rtsx_pci_send_cmd(pcr, 100);
1332 if (err < 0)
1333 return err;
1334
1335 switch (PCI_PID(pcr)) {
1336 case PID_5250:
1337 case PID_524A:
1338 case PID_525A:
1339 case PID_5260:
1340 case PID_5261:
1341 rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, 1, 1);
1342 break;
1343 default:
1344 break;
1345 }
1346
1347 /*init ocp*/
1348 rtsx_pci_init_ocp(pcr);
1349
1350 /* Enable clk_request_n to enable clock power management */
1351 rtsx_pci_write_config_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL + 1, 1);
1352 /* Enter L1 when host tx idle */
1353 rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
1354
1355 if (pcr->ops->extra_init_hw) {
1356 err = pcr->ops->extra_init_hw(pcr);
1357 if (err < 0)
1358 return err;
1359 }
1360
1361 /* No CD interrupt if probing driver with card inserted.
1362 * So we need to initialize pcr->card_exist here.
1363 */
1364 if (pcr->ops->cd_deglitch)
1365 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1366 else
1367 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1368
1369 return 0;
1370 }
1371
1372 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1373 {
1374 int err;
1375
1376 spin_lock_init(&pcr->lock);
1377 mutex_init(&pcr->pcr_mutex);
1378
1379 switch (PCI_PID(pcr)) {
1380 default:
1381 case 0x5209:
1382 rts5209_init_params(pcr);
1383 break;
1384
1385 case 0x5229:
1386 rts5229_init_params(pcr);
1387 break;
1388
1389 case 0x5289:
1390 rtl8411_init_params(pcr);
1391 break;
1392
1393 case 0x5227:
1394 rts5227_init_params(pcr);
1395 break;
1396
1397 case 0x522A:
1398 rts522a_init_params(pcr);
1399 break;
1400
1401 case 0x5249:
1402 rts5249_init_params(pcr);
1403 break;
1404
1405 case 0x524A:
1406 rts524a_init_params(pcr);
1407 break;
1408
1409 case 0x525A:
1410 rts525a_init_params(pcr);
1411 break;
1412
1413 case 0x5287:
1414 rtl8411b_init_params(pcr);
1415 break;
1416
1417 case 0x5286:
1418 rtl8402_init_params(pcr);
1419 break;
1420
1421 case 0x5260:
1422 rts5260_init_params(pcr);
1423 break;
1424
1425 case 0x5261:
1426 rts5261_init_params(pcr);
1427 break;
1428 }
1429
1430 pcr_dbg(pcr, "PID: 0x%04x, IC version: 0x%02x\n",
1431 PCI_PID(pcr), pcr->ic_version);
1432
1433 pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1434 GFP_KERNEL);
1435 if (!pcr->slots)
1436 return -ENOMEM;
1437
1438 if (pcr->ops->fetch_vendor_settings)
1439 pcr->ops->fetch_vendor_settings(pcr);
1440
1441 pcr_dbg(pcr, "pcr->aspm_en = 0x%x\n", pcr->aspm_en);
1442 pcr_dbg(pcr, "pcr->sd30_drive_sel_1v8 = 0x%x\n",
1443 pcr->sd30_drive_sel_1v8);
1444 pcr_dbg(pcr, "pcr->sd30_drive_sel_3v3 = 0x%x\n",
1445 pcr->sd30_drive_sel_3v3);
1446 pcr_dbg(pcr, "pcr->card_drive_sel = 0x%x\n",
1447 pcr->card_drive_sel);
1448 pcr_dbg(pcr, "pcr->flags = 0x%x\n", pcr->flags);
1449
1450 pcr->state = PDEV_STAT_IDLE;
1451 err = rtsx_pci_init_hw(pcr);
1452 if (err < 0) {
1453 kfree(pcr->slots);
1454 return err;
1455 }
1456
1457 return 0;
1458 }
1459
1460 static int rtsx_pci_probe(struct pci_dev *pcidev,
1461 const struct pci_device_id *id)
1462 {
1463 struct rtsx_pcr *pcr;
1464 struct pcr_handle *handle;
1465 u32 base, len;
1466 int ret, i, bar = 0;
1467
1468 dev_dbg(&(pcidev->dev),
1469 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1470 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1471 (int)pcidev->revision);
1472
1473 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1474 if (ret < 0)
1475 return ret;
1476
1477 ret = pci_enable_device(pcidev);
1478 if (ret)
1479 return ret;
1480
1481 ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1482 if (ret)
1483 goto disable;
1484
1485 pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1486 if (!pcr) {
1487 ret = -ENOMEM;
1488 goto release_pci;
1489 }
1490
1491 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1492 if (!handle) {
1493 ret = -ENOMEM;
1494 goto free_pcr;
1495 }
1496 handle->pcr = pcr;
1497
1498 idr_preload(GFP_KERNEL);
1499 spin_lock(&rtsx_pci_lock);
1500 ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1501 if (ret >= 0)
1502 pcr->id = ret;
1503 spin_unlock(&rtsx_pci_lock);
1504 idr_preload_end();
1505 if (ret < 0)
1506 goto free_handle;
1507
1508 pcr->pci = pcidev;
1509 dev_set_drvdata(&pcidev->dev, handle);
1510
1511 if (CHK_PCI_PID(pcr, 0x525A))
1512 bar = 1;
1513 len = pci_resource_len(pcidev, bar);
1514 base = pci_resource_start(pcidev, bar);
1515 pcr->remap_addr = ioremap(base, len);
1516 if (!pcr->remap_addr) {
1517 ret = -ENOMEM;
1518 goto free_handle;
1519 }
1520
1521 pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1522 RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1523 GFP_KERNEL);
1524 if (pcr->rtsx_resv_buf == NULL) {
1525 ret = -ENXIO;
1526 goto unmap;
1527 }
1528 pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1529 pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1530 pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1531 pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1532
1533 pcr->card_inserted = 0;
1534 pcr->card_removed = 0;
1535 INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1536 INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1537
1538 pcr->msi_en = msi_en;
1539 if (pcr->msi_en) {
1540 ret = pci_enable_msi(pcidev);
1541 if (ret)
1542 pcr->msi_en = false;
1543 }
1544
1545 ret = rtsx_pci_acquire_irq(pcr);
1546 if (ret < 0)
1547 goto disable_msi;
1548
1549 pci_set_master(pcidev);
1550 synchronize_irq(pcr->irq);
1551
1552 ret = rtsx_pci_init_chip(pcr);
1553 if (ret < 0)
1554 goto disable_irq;
1555
1556 for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1557 rtsx_pcr_cells[i].platform_data = handle;
1558 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1559 }
1560 ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1561 ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1562 if (ret < 0)
1563 goto disable_irq;
1564
1565 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1566
1567 return 0;
1568
1569 disable_irq:
1570 free_irq(pcr->irq, (void *)pcr);
1571 disable_msi:
1572 if (pcr->msi_en)
1573 pci_disable_msi(pcr->pci);
1574 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1575 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1576 unmap:
1577 iounmap(pcr->remap_addr);
1578 free_handle:
1579 kfree(handle);
1580 free_pcr:
1581 kfree(pcr);
1582 release_pci:
1583 pci_release_regions(pcidev);
1584 disable:
1585 pci_disable_device(pcidev);
1586
1587 return ret;
1588 }
1589
1590 static void rtsx_pci_remove(struct pci_dev *pcidev)
1591 {
1592 struct pcr_handle *handle = pci_get_drvdata(pcidev);
1593 struct rtsx_pcr *pcr = handle->pcr;
1594
1595 pcr->remove_pci = true;
1596
1597 /* Disable interrupts at the pcr level */
1598 spin_lock_irq(&pcr->lock);
1599 rtsx_pci_writel(pcr, RTSX_BIER, 0);
1600 pcr->bier = 0;
1601 spin_unlock_irq(&pcr->lock);
1602
1603 cancel_delayed_work_sync(&pcr->carddet_work);
1604 cancel_delayed_work_sync(&pcr->idle_work);
1605
1606 mfd_remove_devices(&pcidev->dev);
1607
1608 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1609 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1610 free_irq(pcr->irq, (void *)pcr);
1611 if (pcr->msi_en)
1612 pci_disable_msi(pcr->pci);
1613 iounmap(pcr->remap_addr);
1614
1615 pci_release_regions(pcidev);
1616 pci_disable_device(pcidev);
1617
1618 spin_lock(&rtsx_pci_lock);
1619 idr_remove(&rtsx_pci_idr, pcr->id);
1620 spin_unlock(&rtsx_pci_lock);
1621
1622 kfree(pcr->slots);
1623 kfree(pcr);
1624 kfree(handle);
1625
1626 dev_dbg(&(pcidev->dev),
1627 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1628 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1629 }
1630
1631 #ifdef CONFIG_PM
1632
1633 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1634 {
1635 struct pcr_handle *handle;
1636 struct rtsx_pcr *pcr;
1637
1638 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1639
1640 handle = pci_get_drvdata(pcidev);
1641 pcr = handle->pcr;
1642
1643 cancel_delayed_work(&pcr->carddet_work);
1644 cancel_delayed_work(&pcr->idle_work);
1645
1646 mutex_lock(&pcr->pcr_mutex);
1647
1648 rtsx_pci_power_off(pcr, HOST_ENTER_S3);
1649
1650 pci_save_state(pcidev);
1651 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1652 pci_disable_device(pcidev);
1653 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1654
1655 mutex_unlock(&pcr->pcr_mutex);
1656 return 0;
1657 }
1658
1659 static int rtsx_pci_resume(struct pci_dev *pcidev)
1660 {
1661 struct pcr_handle *handle;
1662 struct rtsx_pcr *pcr;
1663 int ret = 0;
1664
1665 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1666
1667 handle = pci_get_drvdata(pcidev);
1668 pcr = handle->pcr;
1669
1670 mutex_lock(&pcr->pcr_mutex);
1671
1672 pci_set_power_state(pcidev, PCI_D0);
1673 pci_restore_state(pcidev);
1674 ret = pci_enable_device(pcidev);
1675 if (ret)
1676 goto out;
1677 pci_set_master(pcidev);
1678
1679 ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1680 if (ret)
1681 goto out;
1682
1683 ret = rtsx_pci_init_hw(pcr);
1684 if (ret)
1685 goto out;
1686
1687 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1688
1689 out:
1690 mutex_unlock(&pcr->pcr_mutex);
1691 return ret;
1692 }
1693
1694 static void rtsx_pci_shutdown(struct pci_dev *pcidev)
1695 {
1696 struct pcr_handle *handle;
1697 struct rtsx_pcr *pcr;
1698
1699 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1700
1701 handle = pci_get_drvdata(pcidev);
1702 pcr = handle->pcr;
1703 rtsx_pci_power_off(pcr, HOST_ENTER_S1);
1704
1705 pci_disable_device(pcidev);
1706 free_irq(pcr->irq, (void *)pcr);
1707 if (pcr->msi_en)
1708 pci_disable_msi(pcr->pci);
1709 }
1710
1711 #else /* CONFIG_PM */
1712
1713 #define rtsx_pci_suspend NULL
1714 #define rtsx_pci_resume NULL
1715 #define rtsx_pci_shutdown NULL
1716
1717 #endif /* CONFIG_PM */
1718
1719 static struct pci_driver rtsx_pci_driver = {
1720 .name = DRV_NAME_RTSX_PCI,
1721 .id_table = rtsx_pci_ids,
1722 .probe = rtsx_pci_probe,
1723 .remove = rtsx_pci_remove,
1724 .suspend = rtsx_pci_suspend,
1725 .resume = rtsx_pci_resume,
1726 .shutdown = rtsx_pci_shutdown,
1727 };
1728 module_pci_driver(rtsx_pci_driver);
1729
1730 MODULE_LICENSE("GPL");
1731 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1732 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");
Linux with added FPC-III support