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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Realtek PCI-Express SD/MMC Card Interface driver
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/module.h>
11#include <linux/slab.h>
12#include <linux/highmem.h>
13#include <linux/delay.h>
14#include <linux/platform_device.h>
15#include <linux/workqueue.h>
16#include <linux/mmc/host.h>
17#include <linux/mmc/mmc.h>
18#include <linux/mmc/sd.h>
19#include <linux/mmc/sdio.h>
20#include <linux/mmc/card.h>
21#include <linux/rtsx_pci.h>
22#include <asm/unaligned.h>
23#include <linux/pm_runtime.h>
24
25struct realtek_pci_sdmmc {
26 struct platform_device *pdev;
27 struct rtsx_pcr *pcr;
28 struct mmc_host *mmc;
29 struct mmc_request *mrq;
30#define SDMMC_WORKQ_NAME "rtsx_pci_sdmmc_workq"
31
32 struct work_struct work;
33 struct mutex host_mutex;
34
35 u8 ssc_depth;
36 unsigned int clock;
37 bool vpclk;
38 bool double_clk;
39 bool eject;
40 bool initial_mode;
41 int prev_power_state;
42 int sg_count;
43 s32 cookie;
44 int cookie_sg_count;
45 bool using_cookie;
46};
47
48static int sdmmc_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios);
49
50static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
51{
52 return &(host->pdev->dev);
53}
54
55static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
56{
57 rtsx_pci_write_register(host->pcr, CARD_STOP,
58 SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
59}
60
61#ifdef DEBUG
62static void dump_reg_range(struct realtek_pci_sdmmc *host, u16 start, u16 end)
63{
64 u16 len = end - start + 1;
65 int i;
66 u8 data[8];
67
68 for (i = 0; i < len; i += 8) {
69 int j;
70 int n = min(8, len - i);
71
72 memset(&data, 0, sizeof(data));
73 for (j = 0; j < n; j++)
74 rtsx_pci_read_register(host->pcr, start + i + j,
75 data + j);
76 dev_dbg(sdmmc_dev(host), "0x%04X(%d): %8ph\n",
77 start + i, n, data);
78 }
79}
80
81static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
82{
83 dump_reg_range(host, 0xFDA0, 0xFDB3);
84 dump_reg_range(host, 0xFD52, 0xFD69);
85}
86#else
87#define sd_print_debug_regs(host)
88#endif /* DEBUG */
89
90static inline int sd_get_cd_int(struct realtek_pci_sdmmc *host)
91{
92 return rtsx_pci_readl(host->pcr, RTSX_BIPR) & SD_EXIST;
93}
94
95static void sd_cmd_set_sd_cmd(struct rtsx_pcr *pcr, struct mmc_command *cmd)
96{
97 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF,
98 SD_CMD_START | cmd->opcode);
99 rtsx_pci_write_be32(pcr, SD_CMD1, cmd->arg);
100}
101
102static void sd_cmd_set_data_len(struct rtsx_pcr *pcr, u16 blocks, u16 blksz)
103{
104 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, blocks);
105 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, blocks >> 8);
106 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, blksz);
107 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, blksz >> 8);
108}
109
110static int sd_response_type(struct mmc_command *cmd)
111{
112 switch (mmc_resp_type(cmd)) {
113 case MMC_RSP_NONE:
114 return SD_RSP_TYPE_R0;
115 case MMC_RSP_R1:
116 return SD_RSP_TYPE_R1;
117 case MMC_RSP_R1_NO_CRC:
118 return SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
119 case MMC_RSP_R1B:
120 return SD_RSP_TYPE_R1b;
121 case MMC_RSP_R2:
122 return SD_RSP_TYPE_R2;
123 case MMC_RSP_R3:
124 return SD_RSP_TYPE_R3;
125 default:
126 return -EINVAL;
127 }
128}
129
130static int sd_status_index(int resp_type)
131{
132 if (resp_type == SD_RSP_TYPE_R0)
133 return 0;
134 else if (resp_type == SD_RSP_TYPE_R2)
135 return 16;
136
137 return 5;
138}
139/*
140 * sd_pre_dma_transfer - do dma_map_sg() or using cookie
141 *
142 * @pre: if called in pre_req()
143 * return:
144 * 0 - do dma_map_sg()
145 * 1 - using cookie
146 */
147static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
148 struct mmc_data *data, bool pre)
149{
150 struct rtsx_pcr *pcr = host->pcr;
151 int read = data->flags & MMC_DATA_READ;
152 int count = 0;
153 int using_cookie = 0;
154
155 if (!pre && data->host_cookie && data->host_cookie != host->cookie) {
156 dev_err(sdmmc_dev(host),
157 "error: data->host_cookie = %d, host->cookie = %d\n",
158 data->host_cookie, host->cookie);
159 data->host_cookie = 0;
160 }
161
162 if (pre || data->host_cookie != host->cookie) {
163 count = rtsx_pci_dma_map_sg(pcr, data->sg, data->sg_len, read);
164 } else {
165 count = host->cookie_sg_count;
166 using_cookie = 1;
167 }
168
169 if (pre) {
170 host->cookie_sg_count = count;
171 if (++host->cookie < 0)
172 host->cookie = 1;
173 data->host_cookie = host->cookie;
174 } else {
175 host->sg_count = count;
176 }
177
178 return using_cookie;
179}
180
181static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
182{
183 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
184 struct mmc_data *data = mrq->data;
185
186 if (data->host_cookie) {
187 dev_err(sdmmc_dev(host),
188 "error: reset data->host_cookie = %d\n",
189 data->host_cookie);
190 data->host_cookie = 0;
191 }
192
193 sd_pre_dma_transfer(host, data, true);
194 dev_dbg(sdmmc_dev(host), "pre dma sg: %d\n", host->cookie_sg_count);
195}
196
197static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
198 int err)
199{
200 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
201 struct rtsx_pcr *pcr = host->pcr;
202 struct mmc_data *data = mrq->data;
203 int read = data->flags & MMC_DATA_READ;
204
205 rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
206 data->host_cookie = 0;
207}
208
209static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
210 struct mmc_command *cmd)
211{
212 struct rtsx_pcr *pcr = host->pcr;
213 u8 cmd_idx = (u8)cmd->opcode;
214 u32 arg = cmd->arg;
215 int err = 0;
216 int timeout = 100;
217 int i;
218 u8 *ptr;
219 int rsp_type;
220 int stat_idx;
221 bool clock_toggled = false;
222
223 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
224 __func__, cmd_idx, arg);
225
226 rsp_type = sd_response_type(cmd);
227 if (rsp_type < 0)
228 goto out;
229
230 stat_idx = sd_status_index(rsp_type);
231
232 if (rsp_type == SD_RSP_TYPE_R1b)
233 timeout = cmd->busy_timeout ? cmd->busy_timeout : 3000;
234
235 if (cmd->opcode == SD_SWITCH_VOLTAGE) {
236 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
237 0xFF, SD_CLK_TOGGLE_EN);
238 if (err < 0)
239 goto out;
240
241 clock_toggled = true;
242 }
243
244 rtsx_pci_init_cmd(pcr);
245 sd_cmd_set_sd_cmd(pcr, cmd);
246 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
247 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
248 0x01, PINGPONG_BUFFER);
249 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
250 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
251 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
252 SD_TRANSFER_END | SD_STAT_IDLE,
253 SD_TRANSFER_END | SD_STAT_IDLE);
254
255 if (rsp_type == SD_RSP_TYPE_R2) {
256 /* Read data from ping-pong buffer */
257 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
258 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
259 } else if (rsp_type != SD_RSP_TYPE_R0) {
260 /* Read data from SD_CMDx registers */
261 for (i = SD_CMD0; i <= SD_CMD4; i++)
262 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
263 }
264
265 rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
266
267 err = rtsx_pci_send_cmd(pcr, timeout);
268 if (err < 0) {
269 sd_print_debug_regs(host);
270 sd_clear_error(host);
271 dev_dbg(sdmmc_dev(host),
272 "rtsx_pci_send_cmd error (err = %d)\n", err);
273 goto out;
274 }
275
276 if (rsp_type == SD_RSP_TYPE_R0) {
277 err = 0;
278 goto out;
279 }
280
281 /* Eliminate returned value of CHECK_REG_CMD */
282 ptr = rtsx_pci_get_cmd_data(pcr) + 1;
283
284 /* Check (Start,Transmission) bit of Response */
285 if ((ptr[0] & 0xC0) != 0) {
286 err = -EILSEQ;
287 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
288 goto out;
289 }
290
291 /* Check CRC7 */
292 if (!(rsp_type & SD_NO_CHECK_CRC7)) {
293 if (ptr[stat_idx] & SD_CRC7_ERR) {
294 err = -EILSEQ;
295 dev_dbg(sdmmc_dev(host), "CRC7 error\n");
296 goto out;
297 }
298 }
299
300 if (rsp_type == SD_RSP_TYPE_R2) {
301 /*
302 * The controller offloads the last byte {CRC-7, end bit 1'b1}
303 * of response type R2. Assign dummy CRC, 0, and end bit to the
304 * byte(ptr[16], goes into the LSB of resp[3] later).
305 */
306 ptr[16] = 1;
307
308 for (i = 0; i < 4; i++) {
309 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
310 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
311 i, cmd->resp[i]);
312 }
313 } else {
314 cmd->resp[0] = get_unaligned_be32(ptr + 1);
315 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
316 cmd->resp[0]);
317 }
318
319out:
320 cmd->error = err;
321
322 if (err && clock_toggled)
323 rtsx_pci_write_register(pcr, SD_BUS_STAT,
324 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
325}
326
327static int sd_read_data(struct realtek_pci_sdmmc *host, struct mmc_command *cmd,
328 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
329{
330 struct rtsx_pcr *pcr = host->pcr;
331 int err;
332 u8 trans_mode;
333
334 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
335 __func__, cmd->opcode, cmd->arg);
336
337 if (!buf)
338 buf_len = 0;
339
340 if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
341 trans_mode = SD_TM_AUTO_TUNING;
342 else
343 trans_mode = SD_TM_NORMAL_READ;
344
345 rtsx_pci_init_cmd(pcr);
346 sd_cmd_set_sd_cmd(pcr, cmd);
347 sd_cmd_set_data_len(pcr, 1, byte_cnt);
348 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
349 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
350 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
351 if (trans_mode != SD_TM_AUTO_TUNING)
352 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
353 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
354
355 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
356 0xFF, trans_mode | SD_TRANSFER_START);
357 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
358 SD_TRANSFER_END, SD_TRANSFER_END);
359
360 err = rtsx_pci_send_cmd(pcr, timeout);
361 if (err < 0) {
362 sd_print_debug_regs(host);
363 dev_dbg(sdmmc_dev(host),
364 "rtsx_pci_send_cmd fail (err = %d)\n", err);
365 return err;
366 }
367
368 if (buf && buf_len) {
369 err = rtsx_pci_read_ppbuf(pcr, buf, buf_len);
370 if (err < 0) {
371 dev_dbg(sdmmc_dev(host),
372 "rtsx_pci_read_ppbuf fail (err = %d)\n", err);
373 return err;
374 }
375 }
376
377 return 0;
378}
379
380static int sd_write_data(struct realtek_pci_sdmmc *host,
381 struct mmc_command *cmd, u16 byte_cnt, u8 *buf, int buf_len,
382 int timeout)
383{
384 struct rtsx_pcr *pcr = host->pcr;
385 int err;
386
387 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
388 __func__, cmd->opcode, cmd->arg);
389
390 if (!buf)
391 buf_len = 0;
392
393 sd_send_cmd_get_rsp(host, cmd);
394 if (cmd->error)
395 return cmd->error;
396
397 if (buf && buf_len) {
398 err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
399 if (err < 0) {
400 dev_dbg(sdmmc_dev(host),
401 "rtsx_pci_write_ppbuf fail (err = %d)\n", err);
402 return err;
403 }
404 }
405
406 rtsx_pci_init_cmd(pcr);
407 sd_cmd_set_data_len(pcr, 1, byte_cnt);
408 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
409 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
410 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0);
411 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
412 SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
413 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
414 SD_TRANSFER_END, SD_TRANSFER_END);
415
416 err = rtsx_pci_send_cmd(pcr, timeout);
417 if (err < 0) {
418 sd_print_debug_regs(host);
419 dev_dbg(sdmmc_dev(host),
420 "rtsx_pci_send_cmd fail (err = %d)\n", err);
421 return err;
422 }
423
424 return 0;
425}
426
427static int sd_read_long_data(struct realtek_pci_sdmmc *host,
428 struct mmc_request *mrq)
429{
430 struct rtsx_pcr *pcr = host->pcr;
431 struct mmc_host *mmc = host->mmc;
432 struct mmc_card *card = mmc->card;
433 struct mmc_command *cmd = mrq->cmd;
434 struct mmc_data *data = mrq->data;
435 int uhs = mmc_card_uhs(card);
436 u8 cfg2 = 0;
437 int err;
438 int resp_type;
439 size_t data_len = data->blksz * data->blocks;
440
441 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
442 __func__, cmd->opcode, cmd->arg);
443
444 resp_type = sd_response_type(cmd);
445 if (resp_type < 0)
446 return resp_type;
447
448 if (!uhs)
449 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
450
451 rtsx_pci_init_cmd(pcr);
452 sd_cmd_set_sd_cmd(pcr, cmd);
453 sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
454 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
455 DMA_DONE_INT, DMA_DONE_INT);
456 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
457 0xFF, (u8)(data_len >> 24));
458 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
459 0xFF, (u8)(data_len >> 16));
460 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
461 0xFF, (u8)(data_len >> 8));
462 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
463 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
464 0x03 | DMA_PACK_SIZE_MASK,
465 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
466 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
467 0x01, RING_BUFFER);
468 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2 | resp_type);
469 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
470 SD_TRANSFER_START | SD_TM_AUTO_READ_2);
471 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
472 SD_TRANSFER_END, SD_TRANSFER_END);
473 rtsx_pci_send_cmd_no_wait(pcr);
474
475 err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 1, 10000);
476 if (err < 0) {
477 sd_print_debug_regs(host);
478 sd_clear_error(host);
479 return err;
480 }
481
482 return 0;
483}
484
485static int sd_write_long_data(struct realtek_pci_sdmmc *host,
486 struct mmc_request *mrq)
487{
488 struct rtsx_pcr *pcr = host->pcr;
489 struct mmc_host *mmc = host->mmc;
490 struct mmc_card *card = mmc->card;
491 struct mmc_command *cmd = mrq->cmd;
492 struct mmc_data *data = mrq->data;
493 int uhs = mmc_card_uhs(card);
494 u8 cfg2;
495 int err;
496 size_t data_len = data->blksz * data->blocks;
497
498 sd_send_cmd_get_rsp(host, cmd);
499 if (cmd->error)
500 return cmd->error;
501
502 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
503 __func__, cmd->opcode, cmd->arg);
504
505 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
506 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
507
508 if (!uhs)
509 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
510
511 rtsx_pci_init_cmd(pcr);
512 sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
513 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
514 DMA_DONE_INT, DMA_DONE_INT);
515 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
516 0xFF, (u8)(data_len >> 24));
517 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
518 0xFF, (u8)(data_len >> 16));
519 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
520 0xFF, (u8)(data_len >> 8));
521 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
522 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
523 0x03 | DMA_PACK_SIZE_MASK,
524 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
525 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
526 0x01, RING_BUFFER);
527 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
528 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
529 SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
530 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
531 SD_TRANSFER_END, SD_TRANSFER_END);
532 rtsx_pci_send_cmd_no_wait(pcr);
533 err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 0, 10000);
534 if (err < 0) {
535 sd_clear_error(host);
536 return err;
537 }
538
539 return 0;
540}
541
542static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
543{
544 rtsx_pci_write_register(host->pcr, SD_CFG1,
545 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
546}
547
548static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
549{
550 rtsx_pci_write_register(host->pcr, SD_CFG1,
551 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
552}
553
554static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
555{
556 struct mmc_data *data = mrq->data;
557 int err;
558
559 if (host->sg_count < 0) {
560 data->error = host->sg_count;
561 dev_dbg(sdmmc_dev(host), "%s: sg_count = %d is invalid\n",
562 __func__, host->sg_count);
563 return data->error;
564 }
565
566 if (data->flags & MMC_DATA_READ) {
567 if (host->initial_mode)
568 sd_disable_initial_mode(host);
569
570 err = sd_read_long_data(host, mrq);
571
572 if (host->initial_mode)
573 sd_enable_initial_mode(host);
574
575 return err;
576 }
577
578 return sd_write_long_data(host, mrq);
579}
580
581static void sd_normal_rw(struct realtek_pci_sdmmc *host,
582 struct mmc_request *mrq)
583{
584 struct mmc_command *cmd = mrq->cmd;
585 struct mmc_data *data = mrq->data;
586 u8 *buf;
587
588 buf = kzalloc(data->blksz, GFP_NOIO);
589 if (!buf) {
590 cmd->error = -ENOMEM;
591 return;
592 }
593
594 if (data->flags & MMC_DATA_READ) {
595 if (host->initial_mode)
596 sd_disable_initial_mode(host);
597
598 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
599 data->blksz, 200);
600
601 if (host->initial_mode)
602 sd_enable_initial_mode(host);
603
604 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
605 } else {
606 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
607
608 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
609 data->blksz, 200);
610 }
611
612 kfree(buf);
613}
614
615static int sd_change_phase(struct realtek_pci_sdmmc *host,
616 u8 sample_point, bool rx)
617{
618 struct rtsx_pcr *pcr = host->pcr;
619 u16 SD_VP_CTL = 0;
620 dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
621 __func__, rx ? "RX" : "TX", sample_point);
622
623 rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
624 if (rx) {
625 SD_VP_CTL = SD_VPRX_CTL;
626 rtsx_pci_write_register(pcr, SD_VPRX_CTL,
627 PHASE_SELECT_MASK, sample_point);
628 } else {
629 SD_VP_CTL = SD_VPTX_CTL;
630 rtsx_pci_write_register(pcr, SD_VPTX_CTL,
631 PHASE_SELECT_MASK, sample_point);
632 }
633 rtsx_pci_write_register(pcr, SD_VP_CTL, PHASE_NOT_RESET, 0);
634 rtsx_pci_write_register(pcr, SD_VP_CTL, PHASE_NOT_RESET,
635 PHASE_NOT_RESET);
636 rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, 0);
637 rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
638
639 return 0;
640}
641
642static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
643{
644 bit %= RTSX_PHASE_MAX;
645 return phase_map & (1 << bit);
646}
647
648static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
649{
650 int i;
651
652 for (i = 0; i < RTSX_PHASE_MAX; i++) {
653 if (test_phase_bit(phase_map, start_bit + i) == 0)
654 return i;
655 }
656 return RTSX_PHASE_MAX;
657}
658
659static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
660{
661 int start = 0, len = 0;
662 int start_final = 0, len_final = 0;
663 u8 final_phase = 0xFF;
664
665 if (phase_map == 0) {
666 dev_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
667 return final_phase;
668 }
669
670 while (start < RTSX_PHASE_MAX) {
671 len = sd_get_phase_len(phase_map, start);
672 if (len_final < len) {
673 start_final = start;
674 len_final = len;
675 }
676 start += len ? len : 1;
677 }
678
679 final_phase = (start_final + len_final / 2) % RTSX_PHASE_MAX;
680 dev_dbg(sdmmc_dev(host), "phase: [map:%x] [maxlen:%d] [final:%d]\n",
681 phase_map, len_final, final_phase);
682
683 return final_phase;
684}
685
686static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
687{
688 int i;
689 u8 val = 0;
690
691 for (i = 0; i < 100; i++) {
692 rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
693 if (val & SD_DATA_IDLE)
694 return;
695
696 udelay(100);
697 }
698}
699
700static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
701 u8 opcode, u8 sample_point)
702{
703 int err;
704 struct mmc_command cmd = {};
705 struct rtsx_pcr *pcr = host->pcr;
706
707 sd_change_phase(host, sample_point, true);
708
709 rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN,
710 SD_RSP_80CLK_TIMEOUT_EN);
711
712 cmd.opcode = opcode;
713 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
714 if (err < 0) {
715 /* Wait till SD DATA IDLE */
716 sd_wait_data_idle(host);
717 sd_clear_error(host);
718 rtsx_pci_write_register(pcr, SD_CFG3,
719 SD_RSP_80CLK_TIMEOUT_EN, 0);
720 return err;
721 }
722
723 rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN, 0);
724 return 0;
725}
726
727static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
728 u8 opcode, u32 *phase_map)
729{
730 int err, i;
731 u32 raw_phase_map = 0;
732
733 for (i = 0; i < RTSX_PHASE_MAX; i++) {
734 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
735 if (err == 0)
736 raw_phase_map |= 1 << i;
737 }
738
739 if (phase_map)
740 *phase_map = raw_phase_map;
741
742 return 0;
743}
744
745static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
746{
747 int err, i;
748 u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
749 u8 final_phase;
750
751 for (i = 0; i < RX_TUNING_CNT; i++) {
752 err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
753 if (err < 0)
754 return err;
755
756 if (raw_phase_map[i] == 0)
757 break;
758 }
759
760 phase_map = 0xFFFFFFFF;
761 for (i = 0; i < RX_TUNING_CNT; i++) {
762 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
763 i, raw_phase_map[i]);
764 phase_map &= raw_phase_map[i];
765 }
766 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\n", phase_map);
767
768 if (phase_map) {
769 final_phase = sd_search_final_phase(host, phase_map);
770 if (final_phase == 0xFF)
771 return -EINVAL;
772
773 err = sd_change_phase(host, final_phase, true);
774 if (err < 0)
775 return err;
776 } else {
777 return -EINVAL;
778 }
779
780 return 0;
781}
782
783static inline int sdio_extblock_cmd(struct mmc_command *cmd,
784 struct mmc_data *data)
785{
786 return (cmd->opcode == SD_IO_RW_EXTENDED) && (data->blksz == 512);
787}
788
789static inline int sd_rw_cmd(struct mmc_command *cmd)
790{
791 return mmc_op_multi(cmd->opcode) ||
792 (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
793 (cmd->opcode == MMC_WRITE_BLOCK);
794}
795
796static void sd_request(struct work_struct *work)
797{
798 struct realtek_pci_sdmmc *host = container_of(work,
799 struct realtek_pci_sdmmc, work);
800 struct rtsx_pcr *pcr = host->pcr;
801
802 struct mmc_host *mmc = host->mmc;
803 struct mmc_request *mrq = host->mrq;
804 struct mmc_command *cmd = mrq->cmd;
805 struct mmc_data *data = mrq->data;
806
807 unsigned int data_size = 0;
808 int err;
809
810 if (host->eject || !sd_get_cd_int(host)) {
811 cmd->error = -ENOMEDIUM;
812 goto finish;
813 }
814
815 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
816 if (err) {
817 cmd->error = err;
818 goto finish;
819 }
820
821 mutex_lock(&pcr->pcr_mutex);
822
823 rtsx_pci_start_run(pcr);
824
825 rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
826 host->initial_mode, host->double_clk, host->vpclk);
827 rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
828 rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
829 CARD_SHARE_MASK, CARD_SHARE_48_SD);
830
831 mutex_lock(&host->host_mutex);
832 host->mrq = mrq;
833 mutex_unlock(&host->host_mutex);
834
835 if (mrq->data)
836 data_size = data->blocks * data->blksz;
837
838 if (!data_size) {
839 sd_send_cmd_get_rsp(host, cmd);
840 } else if (sd_rw_cmd(cmd) || sdio_extblock_cmd(cmd, data)) {
841 cmd->error = sd_rw_multi(host, mrq);
842 if (!host->using_cookie)
843 sdmmc_post_req(host->mmc, host->mrq, 0);
844
845 if (mmc_op_multi(cmd->opcode) && mrq->stop)
846 sd_send_cmd_get_rsp(host, mrq->stop);
847 } else {
848 sd_normal_rw(host, mrq);
849 }
850
851 if (mrq->data) {
852 if (cmd->error || data->error)
853 data->bytes_xfered = 0;
854 else
855 data->bytes_xfered = data->blocks * data->blksz;
856 }
857
858 mutex_unlock(&pcr->pcr_mutex);
859
860finish:
861 if (cmd->error) {
862 dev_dbg(sdmmc_dev(host), "CMD %d 0x%08x error(%d)\n",
863 cmd->opcode, cmd->arg, cmd->error);
864 }
865
866 mutex_lock(&host->host_mutex);
867 host->mrq = NULL;
868 mutex_unlock(&host->host_mutex);
869
870 mmc_request_done(mmc, mrq);
871}
872
873static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
874{
875 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
876 struct mmc_data *data = mrq->data;
877
878 mutex_lock(&host->host_mutex);
879 host->mrq = mrq;
880 mutex_unlock(&host->host_mutex);
881
882 if (sd_rw_cmd(mrq->cmd) || sdio_extblock_cmd(mrq->cmd, data))
883 host->using_cookie = sd_pre_dma_transfer(host, data, false);
884
885 schedule_work(&host->work);
886}
887
888static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
889 unsigned char bus_width)
890{
891 int err = 0;
892 u8 width[] = {
893 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
894 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
895 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
896 };
897
898 if (bus_width <= MMC_BUS_WIDTH_8)
899 err = rtsx_pci_write_register(host->pcr, SD_CFG1,
900 0x03, width[bus_width]);
901
902 return err;
903}
904
905static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
906{
907 struct rtsx_pcr *pcr = host->pcr;
908 struct mmc_host *mmc = host->mmc;
909 int err;
910 u32 val;
911 u8 test_mode;
912
913 if (host->prev_power_state == MMC_POWER_ON)
914 return 0;
915
916 if (host->prev_power_state == MMC_POWER_UP) {
917 rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, 0);
918 goto finish;
919 }
920
921 msleep(100);
922
923 rtsx_pci_init_cmd(pcr);
924 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
925 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
926 CARD_SHARE_MASK, CARD_SHARE_48_SD);
927 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
928 SD_CLK_EN, SD_CLK_EN);
929 err = rtsx_pci_send_cmd(pcr, 100);
930 if (err < 0)
931 return err;
932
933 err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
934 if (err < 0)
935 return err;
936
937 err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
938 if (err < 0)
939 return err;
940
941 mdelay(1);
942
943 err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
944 if (err < 0)
945 return err;
946
947 /* send at least 74 clocks */
948 rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, SD_CLK_TOGGLE_EN);
949
950 if (PCI_PID(pcr) == PID_5261) {
951 /*
952 * If test mode is set switch to SD Express mandatorily,
953 * this is only for factory testing.
954 */
955 rtsx_pci_read_register(pcr, RTS5261_FW_CFG_INFO0, &test_mode);
956 if (test_mode & RTS5261_FW_EXPRESS_TEST_MASK) {
957 sdmmc_init_sd_express(mmc, NULL);
958 return 0;
959 }
960 if (pcr->extra_caps & EXTRA_CAPS_SD_EXPRESS)
961 mmc->caps2 |= MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V;
962 /*
963 * HW read wp status when resuming from S3/S4,
964 * and then picks SD legacy interface if it's set
965 * in read-only mode.
966 */
967 val = rtsx_pci_readl(pcr, RTSX_BIPR);
968 if (val & SD_WRITE_PROTECT) {
969 pcr->extra_caps &= ~EXTRA_CAPS_SD_EXPRESS;
970 mmc->caps2 &= ~(MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V);
971 }
972 }
973
974finish:
975 host->prev_power_state = power_mode;
976 return 0;
977}
978
979static int sd_power_off(struct realtek_pci_sdmmc *host)
980{
981 struct rtsx_pcr *pcr = host->pcr;
982 int err;
983
984 host->prev_power_state = MMC_POWER_OFF;
985
986 rtsx_pci_init_cmd(pcr);
987
988 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
989 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
990
991 err = rtsx_pci_send_cmd(pcr, 100);
992 if (err < 0)
993 return err;
994
995 err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
996 if (err < 0)
997 return err;
998
999 return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
1000}
1001
1002static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
1003 unsigned char power_mode)
1004{
1005 int err;
1006
1007 if (power_mode == MMC_POWER_OFF)
1008 err = sd_power_off(host);
1009 else
1010 err = sd_power_on(host, power_mode);
1011
1012 return err;
1013}
1014
1015static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
1016{
1017 struct rtsx_pcr *pcr = host->pcr;
1018 int err = 0;
1019
1020 rtsx_pci_init_cmd(pcr);
1021
1022 switch (timing) {
1023 case MMC_TIMING_UHS_SDR104:
1024 case MMC_TIMING_UHS_SDR50:
1025 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1026 0x0C | SD_ASYNC_FIFO_NOT_RST,
1027 SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
1028 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1029 CLK_LOW_FREQ, CLK_LOW_FREQ);
1030 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1031 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1032 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1033 break;
1034
1035 case MMC_TIMING_MMC_DDR52:
1036 case MMC_TIMING_UHS_DDR50:
1037 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1038 0x0C | SD_ASYNC_FIFO_NOT_RST,
1039 SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
1040 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1041 CLK_LOW_FREQ, CLK_LOW_FREQ);
1042 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1043 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1044 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1045 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1046 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1047 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1048 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1049 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1050 break;
1051
1052 case MMC_TIMING_MMC_HS:
1053 case MMC_TIMING_SD_HS:
1054 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1055 0x0C, SD_20_MODE);
1056 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1057 CLK_LOW_FREQ, CLK_LOW_FREQ);
1058 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1059 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1060 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1061 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1062 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1063 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1064 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1065 break;
1066
1067 default:
1068 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1069 SD_CFG1, 0x0C, SD_20_MODE);
1070 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1071 CLK_LOW_FREQ, CLK_LOW_FREQ);
1072 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1073 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1074 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1075 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1076 SD_PUSH_POINT_CTL, 0xFF, 0);
1077 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1078 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1079 break;
1080 }
1081
1082 err = rtsx_pci_send_cmd(pcr, 100);
1083
1084 return err;
1085}
1086
1087static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1088{
1089 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1090 struct rtsx_pcr *pcr = host->pcr;
1091
1092 if (host->eject)
1093 return;
1094
1095 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
1096 return;
1097
1098 mutex_lock(&pcr->pcr_mutex);
1099
1100 rtsx_pci_start_run(pcr);
1101
1102 sd_set_bus_width(host, ios->bus_width);
1103 sd_set_power_mode(host, ios->power_mode);
1104 sd_set_timing(host, ios->timing);
1105
1106 host->vpclk = false;
1107 host->double_clk = true;
1108
1109 switch (ios->timing) {
1110 case MMC_TIMING_UHS_SDR104:
1111 case MMC_TIMING_UHS_SDR50:
1112 host->ssc_depth = RTSX_SSC_DEPTH_2M;
1113 host->vpclk = true;
1114 host->double_clk = false;
1115 break;
1116 case MMC_TIMING_MMC_DDR52:
1117 case MMC_TIMING_UHS_DDR50:
1118 case MMC_TIMING_UHS_SDR25:
1119 host->ssc_depth = RTSX_SSC_DEPTH_1M;
1120 break;
1121 default:
1122 host->ssc_depth = RTSX_SSC_DEPTH_500K;
1123 break;
1124 }
1125
1126 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1127
1128 host->clock = ios->clock;
1129 rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
1130 host->initial_mode, host->double_clk, host->vpclk);
1131
1132 mutex_unlock(&pcr->pcr_mutex);
1133}
1134
1135static int sdmmc_get_ro(struct mmc_host *mmc)
1136{
1137 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1138 struct rtsx_pcr *pcr = host->pcr;
1139 int ro = 0;
1140 u32 val;
1141
1142 if (host->eject)
1143 return -ENOMEDIUM;
1144
1145 mutex_lock(&pcr->pcr_mutex);
1146
1147 rtsx_pci_start_run(pcr);
1148
1149 /* Check SD mechanical write-protect switch */
1150 val = rtsx_pci_readl(pcr, RTSX_BIPR);
1151 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1152 if (val & SD_WRITE_PROTECT)
1153 ro = 1;
1154
1155 mutex_unlock(&pcr->pcr_mutex);
1156
1157 return ro;
1158}
1159
1160static int sdmmc_get_cd(struct mmc_host *mmc)
1161{
1162 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1163 struct rtsx_pcr *pcr = host->pcr;
1164 int cd = 0;
1165 u32 val;
1166
1167 if (host->eject)
1168 return cd;
1169
1170 mutex_lock(&pcr->pcr_mutex);
1171
1172 rtsx_pci_start_run(pcr);
1173
1174 /* Check SD card detect */
1175 val = rtsx_pci_card_exist(pcr);
1176 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1177 if (val & SD_EXIST)
1178 cd = 1;
1179
1180 mutex_unlock(&pcr->pcr_mutex);
1181
1182 return cd;
1183}
1184
1185static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
1186{
1187 struct rtsx_pcr *pcr = host->pcr;
1188 int err;
1189 u8 stat;
1190
1191 /* Reference to Signal Voltage Switch Sequence in SD spec.
1192 * Wait for a period of time so that the card can drive SD_CMD and
1193 * SD_DAT[3:0] to low after sending back CMD11 response.
1194 */
1195 mdelay(1);
1196
1197 /* SD_CMD, SD_DAT[3:0] should be driven to low by card;
1198 * If either one of SD_CMD,SD_DAT[3:0] is not low,
1199 * abort the voltage switch sequence;
1200 */
1201 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1202 if (err < 0)
1203 return err;
1204
1205 if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1206 SD_DAT1_STATUS | SD_DAT0_STATUS))
1207 return -EINVAL;
1208
1209 /* Stop toggle SD clock */
1210 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1211 0xFF, SD_CLK_FORCE_STOP);
1212 if (err < 0)
1213 return err;
1214
1215 return 0;
1216}
1217
1218static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
1219{
1220 struct rtsx_pcr *pcr = host->pcr;
1221 int err;
1222 u8 stat, mask, val;
1223
1224 /* Wait 1.8V output of voltage regulator in card stable */
1225 msleep(50);
1226
1227 /* Toggle SD clock again */
1228 err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
1229 if (err < 0)
1230 return err;
1231
1232 /* Wait for a period of time so that the card can drive
1233 * SD_DAT[3:0] to high at 1.8V
1234 */
1235 msleep(20);
1236
1237 /* SD_CMD, SD_DAT[3:0] should be pulled high by host */
1238 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1239 if (err < 0)
1240 return err;
1241
1242 mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1243 SD_DAT1_STATUS | SD_DAT0_STATUS;
1244 val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1245 SD_DAT1_STATUS | SD_DAT0_STATUS;
1246 if ((stat & mask) != val) {
1247 dev_dbg(sdmmc_dev(host),
1248 "%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
1249 rtsx_pci_write_register(pcr, SD_BUS_STAT,
1250 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1251 rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
1252 return -EINVAL;
1253 }
1254
1255 return 0;
1256}
1257
1258static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1259{
1260 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1261 struct rtsx_pcr *pcr = host->pcr;
1262 int err = 0;
1263 u8 voltage;
1264
1265 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1266 __func__, ios->signal_voltage);
1267
1268 if (host->eject)
1269 return -ENOMEDIUM;
1270
1271 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1272 if (err)
1273 return err;
1274
1275 mutex_lock(&pcr->pcr_mutex);
1276
1277 rtsx_pci_start_run(pcr);
1278
1279 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
1280 voltage = OUTPUT_3V3;
1281 else
1282 voltage = OUTPUT_1V8;
1283
1284 if (voltage == OUTPUT_1V8) {
1285 err = sd_wait_voltage_stable_1(host);
1286 if (err < 0)
1287 goto out;
1288 }
1289
1290 err = rtsx_pci_switch_output_voltage(pcr, voltage);
1291 if (err < 0)
1292 goto out;
1293
1294 if (voltage == OUTPUT_1V8) {
1295 err = sd_wait_voltage_stable_2(host);
1296 if (err < 0)
1297 goto out;
1298 }
1299
1300out:
1301 /* Stop toggle SD clock in idle */
1302 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1303 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1304
1305 mutex_unlock(&pcr->pcr_mutex);
1306
1307 return err;
1308}
1309
1310static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1311{
1312 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1313 struct rtsx_pcr *pcr = host->pcr;
1314 int err = 0;
1315
1316 if (host->eject)
1317 return -ENOMEDIUM;
1318
1319 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1320 if (err)
1321 return err;
1322
1323 mutex_lock(&pcr->pcr_mutex);
1324
1325 rtsx_pci_start_run(pcr);
1326
1327 /* Set initial TX phase */
1328 switch (mmc->ios.timing) {
1329 case MMC_TIMING_UHS_SDR104:
1330 err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
1331 break;
1332
1333 case MMC_TIMING_UHS_SDR50:
1334 err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
1335 break;
1336
1337 case MMC_TIMING_UHS_DDR50:
1338 err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
1339 break;
1340
1341 default:
1342 err = 0;
1343 }
1344
1345 if (err)
1346 goto out;
1347
1348 /* Tuning RX phase */
1349 if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
1350 (mmc->ios.timing == MMC_TIMING_UHS_SDR50))
1351 err = sd_tuning_rx(host, opcode);
1352 else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
1353 err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
1354
1355out:
1356 mutex_unlock(&pcr->pcr_mutex);
1357
1358 return err;
1359}
1360
1361static int sdmmc_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
1362{
1363 u32 relink_time;
1364 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1365 struct rtsx_pcr *pcr = host->pcr;
1366
1367 /* Set relink_time for changing to PCIe card */
1368 relink_time = 0x8FFF;
1369
1370 rtsx_pci_write_register(pcr, 0xFF01, 0xFF, relink_time);
1371 rtsx_pci_write_register(pcr, 0xFF02, 0xFF, relink_time >> 8);
1372 rtsx_pci_write_register(pcr, 0xFF03, 0x01, relink_time >> 16);
1373
1374 rtsx_pci_write_register(pcr, PETXCFG, 0x80, 0x80);
1375 rtsx_pci_write_register(pcr, LDO_VCC_CFG0,
1376 RTS5261_LDO1_OCP_THD_MASK,
1377 pcr->option.sd_800mA_ocp_thd);
1378
1379 if (pcr->ops->disable_auto_blink)
1380 pcr->ops->disable_auto_blink(pcr);
1381
1382 /* For PCIe/NVMe mode can't enter delink issue */
1383 pcr->hw_param.interrupt_en &= ~(SD_INT_EN);
1384 rtsx_pci_writel(pcr, RTSX_BIER, pcr->hw_param.interrupt_en);
1385
1386 rtsx_pci_write_register(pcr, RTS5260_AUTOLOAD_CFG4,
1387 RTS5261_AUX_CLK_16M_EN, RTS5261_AUX_CLK_16M_EN);
1388 rtsx_pci_write_register(pcr, RTS5261_FW_CFG0,
1389 RTS5261_FW_ENTER_EXPRESS, RTS5261_FW_ENTER_EXPRESS);
1390 rtsx_pci_write_register(pcr, RTS5261_FW_CFG1,
1391 RTS5261_MCU_CLOCK_GATING, RTS5261_MCU_CLOCK_GATING);
1392 rtsx_pci_write_register(pcr, RTS5261_FW_CFG1,
1393 RTS5261_MCU_BUS_SEL_MASK | RTS5261_MCU_CLOCK_SEL_MASK
1394 | RTS5261_DRIVER_ENABLE_FW,
1395 RTS5261_MCU_CLOCK_SEL_16M | RTS5261_DRIVER_ENABLE_FW);
1396 host->eject = true;
1397 return 0;
1398}
1399
1400static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
1401 .pre_req = sdmmc_pre_req,
1402 .post_req = sdmmc_post_req,
1403 .request = sdmmc_request,
1404 .set_ios = sdmmc_set_ios,
1405 .get_ro = sdmmc_get_ro,
1406 .get_cd = sdmmc_get_cd,
1407 .start_signal_voltage_switch = sdmmc_switch_voltage,
1408 .execute_tuning = sdmmc_execute_tuning,
1409 .init_sd_express = sdmmc_init_sd_express,
1410};
1411
1412static void init_extra_caps(struct realtek_pci_sdmmc *host)
1413{
1414 struct mmc_host *mmc = host->mmc;
1415 struct rtsx_pcr *pcr = host->pcr;
1416
1417 dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
1418
1419 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
1420 mmc->caps |= MMC_CAP_UHS_SDR50;
1421 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
1422 mmc->caps |= MMC_CAP_UHS_SDR104;
1423 if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
1424 mmc->caps |= MMC_CAP_UHS_DDR50;
1425 if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
1426 mmc->caps |= MMC_CAP_1_8V_DDR;
1427 if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
1428 mmc->caps |= MMC_CAP_8_BIT_DATA;
1429 if (pcr->extra_caps & EXTRA_CAPS_NO_MMC)
1430 mmc->caps2 |= MMC_CAP2_NO_MMC;
1431 if (pcr->extra_caps & EXTRA_CAPS_SD_EXPRESS)
1432 mmc->caps2 |= MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V;
1433}
1434
1435static void realtek_init_host(struct realtek_pci_sdmmc *host)
1436{
1437 struct mmc_host *mmc = host->mmc;
1438 struct rtsx_pcr *pcr = host->pcr;
1439
1440 mmc->f_min = 250000;
1441 mmc->f_max = 208000000;
1442 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1443 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1444 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1445 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
1446 if (pcr->rtd3_en)
1447 mmc->caps = mmc->caps | MMC_CAP_AGGRESSIVE_PM;
1448 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
1449 MMC_CAP2_NO_SDIO;
1450 mmc->max_current_330 = 400;
1451 mmc->max_current_180 = 800;
1452 mmc->ops = &realtek_pci_sdmmc_ops;
1453
1454 init_extra_caps(host);
1455
1456 mmc->max_segs = 256;
1457 mmc->max_seg_size = 65536;
1458 mmc->max_blk_size = 512;
1459 mmc->max_blk_count = 65535;
1460 mmc->max_req_size = 524288;
1461}
1462
1463static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
1464{
1465 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1466
1467 host->cookie = -1;
1468 mmc_detect_change(host->mmc, 0);
1469}
1470
1471static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
1472{
1473 struct mmc_host *mmc;
1474 struct realtek_pci_sdmmc *host;
1475 struct rtsx_pcr *pcr;
1476 struct pcr_handle *handle = pdev->dev.platform_data;
1477 int ret;
1478
1479 if (!handle)
1480 return -ENXIO;
1481
1482 pcr = handle->pcr;
1483 if (!pcr)
1484 return -ENXIO;
1485
1486 dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
1487
1488 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1489 if (!mmc)
1490 return -ENOMEM;
1491
1492 host = mmc_priv(mmc);
1493 host->pcr = pcr;
1494 mmc->ios.power_delay_ms = 5;
1495 host->mmc = mmc;
1496 host->pdev = pdev;
1497 host->cookie = -1;
1498 host->prev_power_state = MMC_POWER_OFF;
1499 INIT_WORK(&host->work, sd_request);
1500 platform_set_drvdata(pdev, host);
1501 pcr->slots[RTSX_SD_CARD].p_dev = pdev;
1502 pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
1503
1504 mutex_init(&host->host_mutex);
1505
1506 realtek_init_host(host);
1507
1508 pm_runtime_no_callbacks(&pdev->dev);
1509 pm_runtime_set_active(&pdev->dev);
1510 pm_runtime_enable(&pdev->dev);
1511 pm_runtime_set_autosuspend_delay(&pdev->dev, 200);
1512 pm_runtime_mark_last_busy(&pdev->dev);
1513 pm_runtime_use_autosuspend(&pdev->dev);
1514
1515 ret = mmc_add_host(mmc);
1516 if (ret) {
1517 pm_runtime_dont_use_autosuspend(&pdev->dev);
1518 pm_runtime_disable(&pdev->dev);
1519 mmc_free_host(mmc);
1520 return ret;
1521 }
1522
1523 return 0;
1524}
1525
1526static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
1527{
1528 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1529 struct rtsx_pcr *pcr;
1530 struct mmc_host *mmc;
1531
1532 if (!host)
1533 return 0;
1534
1535 pcr = host->pcr;
1536 pcr->slots[RTSX_SD_CARD].p_dev = NULL;
1537 pcr->slots[RTSX_SD_CARD].card_event = NULL;
1538 mmc = host->mmc;
1539
1540 cancel_work_sync(&host->work);
1541
1542 mutex_lock(&host->host_mutex);
1543 if (host->mrq) {
1544 dev_dbg(&(pdev->dev),
1545 "%s: Controller removed during transfer\n",
1546 mmc_hostname(mmc));
1547
1548 rtsx_pci_complete_unfinished_transfer(pcr);
1549
1550 host->mrq->cmd->error = -ENOMEDIUM;
1551 if (host->mrq->stop)
1552 host->mrq->stop->error = -ENOMEDIUM;
1553 mmc_request_done(mmc, host->mrq);
1554 }
1555 mutex_unlock(&host->host_mutex);
1556
1557 mmc_remove_host(mmc);
1558 host->eject = true;
1559
1560 flush_work(&host->work);
1561
1562 pm_runtime_dont_use_autosuspend(&pdev->dev);
1563 pm_runtime_disable(&pdev->dev);
1564
1565 mmc_free_host(mmc);
1566
1567 dev_dbg(&(pdev->dev),
1568 ": Realtek PCI-E SDMMC controller has been removed\n");
1569
1570 return 0;
1571}
1572
1573static const struct platform_device_id rtsx_pci_sdmmc_ids[] = {
1574 {
1575 .name = DRV_NAME_RTSX_PCI_SDMMC,
1576 }, {
1577 /* sentinel */
1578 }
1579};
1580MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
1581
1582static struct platform_driver rtsx_pci_sdmmc_driver = {
1583 .probe = rtsx_pci_sdmmc_drv_probe,
1584 .remove = rtsx_pci_sdmmc_drv_remove,
1585 .id_table = rtsx_pci_sdmmc_ids,
1586 .driver = {
1587 .name = DRV_NAME_RTSX_PCI_SDMMC,
1588 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1589 },
1590};
1591module_platform_driver(rtsx_pci_sdmmc_driver);
1592
1593MODULE_LICENSE("GPL");
1594MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1595MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");