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Merge tag 'mm-hotfixes-stable-2025-07-11-16-16' of git://git.kernel.org/pub/scm/linux...
[linux-2.6-block.git] / drivers / mmc / host / rtsx_pci_sdmmc.c
... / ...
CommitLineData
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/pci.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/highmem.h>
14#include <linux/delay.h>
15#include <linux/platform_device.h>
16#include <linux/workqueue.h>
17#include <linux/mmc/host.h>
18#include <linux/mmc/mmc.h>
19#include <linux/mmc/sd.h>
20#include <linux/mmc/sdio.h>
21#include <linux/mmc/card.h>
22#include <linux/rtsx_pci.h>
23#include <linux/unaligned.h>
24#include <linux/pm_runtime.h>
25
26struct realtek_pci_sdmmc {
27 struct platform_device *pdev;
28 struct rtsx_pcr *pcr;
29 struct mmc_host *mmc;
30 struct mmc_request *mrq;
31#define SDMMC_WORKQ_NAME "rtsx_pci_sdmmc_workq"
32
33 struct work_struct work;
34 struct mutex host_mutex;
35
36 u8 ssc_depth;
37 unsigned int clock;
38 bool vpclk;
39 bool double_clk;
40 bool eject;
41 bool initial_mode;
42 int prev_power_state;
43 int sg_count;
44 s32 cookie;
45 int cookie_sg_count;
46 bool using_cookie;
47};
48
49static int sdmmc_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios);
50
51static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
52{
53 return &(host->pdev->dev);
54}
55
56static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
57{
58 rtsx_pci_write_register(host->pcr, CARD_STOP,
59 SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
60}
61
62#ifdef DEBUG
63static void dump_reg_range(struct realtek_pci_sdmmc *host, u16 start, u16 end)
64{
65 u16 len = end - start + 1;
66 int i;
67 u8 data[8];
68
69 for (i = 0; i < len; i += 8) {
70 int j;
71 int n = min(8, len - i);
72
73 memset(&data, 0, sizeof(data));
74 for (j = 0; j < n; j++)
75 rtsx_pci_read_register(host->pcr, start + i + j,
76 data + j);
77 dev_dbg(sdmmc_dev(host), "0x%04X(%d): %8ph\n",
78 start + i, n, data);
79 }
80}
81
82static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
83{
84 dump_reg_range(host, 0xFDA0, 0xFDB3);
85 dump_reg_range(host, 0xFD52, 0xFD69);
86}
87#else
88#define sd_print_debug_regs(host)
89#endif /* DEBUG */
90
91static inline int sd_get_cd_int(struct realtek_pci_sdmmc *host)
92{
93 return rtsx_pci_readl(host->pcr, RTSX_BIPR) & SD_EXIST;
94}
95
96static void sd_cmd_set_sd_cmd(struct rtsx_pcr *pcr, struct mmc_command *cmd)
97{
98 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF,
99 SD_CMD_START | cmd->opcode);
100 rtsx_pci_write_be32(pcr, SD_CMD1, cmd->arg);
101}
102
103static void sd_cmd_set_data_len(struct rtsx_pcr *pcr, u16 blocks, u16 blksz)
104{
105 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, blocks);
106 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, blocks >> 8);
107 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, blksz);
108 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, blksz >> 8);
109}
110
111static int sd_response_type(struct mmc_command *cmd)
112{
113 switch (mmc_resp_type(cmd)) {
114 case MMC_RSP_NONE:
115 return SD_RSP_TYPE_R0;
116 case MMC_RSP_R1:
117 return SD_RSP_TYPE_R1;
118 case MMC_RSP_R1B:
119 return SD_RSP_TYPE_R1b;
120 case MMC_RSP_R2:
121 return SD_RSP_TYPE_R2;
122 case MMC_RSP_R3:
123 return SD_RSP_TYPE_R3;
124 default:
125 return -EINVAL;
126 }
127}
128
129static int sd_status_index(int resp_type)
130{
131 if (resp_type == SD_RSP_TYPE_R0)
132 return 0;
133 else if (resp_type == SD_RSP_TYPE_R2)
134 return 16;
135
136 return 5;
137}
138/*
139 * sd_pre_dma_transfer - do dma_map_sg() or using cookie
140 *
141 * @pre: if called in pre_req()
142 * return:
143 * 0 - do dma_map_sg()
144 * 1 - using cookie
145 */
146static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
147 struct mmc_data *data, bool pre)
148{
149 struct rtsx_pcr *pcr = host->pcr;
150 int read = data->flags & MMC_DATA_READ;
151 int count = 0;
152 int using_cookie = 0;
153
154 if (!pre && data->host_cookie && data->host_cookie != host->cookie) {
155 dev_err(sdmmc_dev(host),
156 "error: data->host_cookie = %d, host->cookie = %d\n",
157 data->host_cookie, host->cookie);
158 data->host_cookie = 0;
159 }
160
161 if (pre || data->host_cookie != host->cookie) {
162 count = rtsx_pci_dma_map_sg(pcr, data->sg, data->sg_len, read);
163 } else {
164 count = host->cookie_sg_count;
165 using_cookie = 1;
166 }
167
168 if (pre) {
169 host->cookie_sg_count = count;
170 if (++host->cookie < 0)
171 host->cookie = 1;
172 data->host_cookie = host->cookie;
173 } else {
174 host->sg_count = count;
175 }
176
177 return using_cookie;
178}
179
180static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
181{
182 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
183 struct mmc_data *data = mrq->data;
184
185 if (data->host_cookie) {
186 dev_err(sdmmc_dev(host),
187 "error: reset data->host_cookie = %d\n",
188 data->host_cookie);
189 data->host_cookie = 0;
190 }
191
192 sd_pre_dma_transfer(host, data, true);
193 dev_dbg(sdmmc_dev(host), "pre dma sg: %d\n", host->cookie_sg_count);
194}
195
196static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
197 int err)
198{
199 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
200 struct rtsx_pcr *pcr = host->pcr;
201 struct mmc_data *data = mrq->data;
202 int read = data->flags & MMC_DATA_READ;
203
204 rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
205 data->host_cookie = 0;
206}
207
208static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
209 struct mmc_command *cmd)
210{
211 struct rtsx_pcr *pcr = host->pcr;
212 u8 cmd_idx = (u8)cmd->opcode;
213 u32 arg = cmd->arg;
214 int err = 0;
215 int timeout = 100;
216 int i;
217 u8 *ptr;
218 int rsp_type;
219 int stat_idx;
220 bool clock_toggled = false;
221
222 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
223 __func__, cmd_idx, arg);
224
225 rsp_type = sd_response_type(cmd);
226 if (rsp_type < 0)
227 goto out;
228
229 stat_idx = sd_status_index(rsp_type);
230
231 if (rsp_type == SD_RSP_TYPE_R1b)
232 timeout = cmd->busy_timeout ? cmd->busy_timeout : 3000;
233
234 if (cmd->opcode == SD_SWITCH_VOLTAGE) {
235 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
236 0xFF, SD_CLK_TOGGLE_EN);
237 if (err < 0)
238 goto out;
239
240 clock_toggled = true;
241 }
242
243 rtsx_pci_init_cmd(pcr);
244 sd_cmd_set_sd_cmd(pcr, cmd);
245 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
246 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
247 0x01, PINGPONG_BUFFER);
248 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
249 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
250 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
251 SD_TRANSFER_END | SD_STAT_IDLE,
252 SD_TRANSFER_END | SD_STAT_IDLE);
253
254 if (rsp_type == SD_RSP_TYPE_R2) {
255 /* Read data from ping-pong buffer */
256 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
257 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
258 } else if (rsp_type != SD_RSP_TYPE_R0) {
259 /* Read data from SD_CMDx registers */
260 for (i = SD_CMD0; i <= SD_CMD4; i++)
261 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
262 }
263
264 rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
265
266 err = rtsx_pci_send_cmd(pcr, timeout);
267 if (err < 0) {
268 sd_print_debug_regs(host);
269 sd_clear_error(host);
270 dev_dbg(sdmmc_dev(host),
271 "rtsx_pci_send_cmd error (err = %d)\n", err);
272 goto out;
273 }
274
275 if (rsp_type == SD_RSP_TYPE_R0) {
276 err = 0;
277 goto out;
278 }
279
280 /* Eliminate returned value of CHECK_REG_CMD */
281 ptr = rtsx_pci_get_cmd_data(pcr) + 1;
282
283 /* Check (Start,Transmission) bit of Response */
284 if ((ptr[0] & 0xC0) != 0) {
285 err = -EILSEQ;
286 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
287 goto out;
288 }
289
290 /* Check CRC7 */
291 if (!(rsp_type & SD_NO_CHECK_CRC7)) {
292 if (ptr[stat_idx] & SD_CRC7_ERR) {
293 err = -EILSEQ;
294 dev_dbg(sdmmc_dev(host), "CRC7 error\n");
295 goto out;
296 }
297 }
298
299 if (rsp_type == SD_RSP_TYPE_R2) {
300 /*
301 * The controller offloads the last byte {CRC-7, end bit 1'b1}
302 * of response type R2. Assign dummy CRC, 0, and end bit to the
303 * byte(ptr[16], goes into the LSB of resp[3] later).
304 */
305 ptr[16] = 1;
306
307 for (i = 0; i < 4; i++) {
308 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
309 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
310 i, cmd->resp[i]);
311 }
312 } else {
313 cmd->resp[0] = get_unaligned_be32(ptr + 1);
314 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
315 cmd->resp[0]);
316 }
317
318out:
319 cmd->error = err;
320
321 if (err && clock_toggled)
322 rtsx_pci_write_register(pcr, SD_BUS_STAT,
323 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
324}
325
326static int sd_read_data(struct realtek_pci_sdmmc *host, struct mmc_command *cmd,
327 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
328{
329 struct rtsx_pcr *pcr = host->pcr;
330 int err;
331 u8 trans_mode;
332
333 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
334 __func__, cmd->opcode, cmd->arg);
335
336 if (!buf)
337 buf_len = 0;
338
339 if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
340 trans_mode = SD_TM_AUTO_TUNING;
341 else
342 trans_mode = SD_TM_NORMAL_READ;
343
344 rtsx_pci_init_cmd(pcr);
345 sd_cmd_set_sd_cmd(pcr, cmd);
346 sd_cmd_set_data_len(pcr, 1, byte_cnt);
347 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
348 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
349 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
350 if (trans_mode != SD_TM_AUTO_TUNING)
351 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
352 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
353
354 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
355 0xFF, trans_mode | SD_TRANSFER_START);
356 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
357 SD_TRANSFER_END, SD_TRANSFER_END);
358
359 err = rtsx_pci_send_cmd(pcr, timeout);
360 if (err < 0) {
361 sd_print_debug_regs(host);
362 dev_dbg(sdmmc_dev(host),
363 "rtsx_pci_send_cmd fail (err = %d)\n", err);
364 return err;
365 }
366
367 if (buf && buf_len) {
368 err = rtsx_pci_read_ppbuf(pcr, buf, buf_len);
369 if (err < 0) {
370 dev_dbg(sdmmc_dev(host),
371 "rtsx_pci_read_ppbuf fail (err = %d)\n", err);
372 return err;
373 }
374 }
375
376 return 0;
377}
378
379static int sd_write_data(struct realtek_pci_sdmmc *host,
380 struct mmc_command *cmd, u16 byte_cnt, u8 *buf, int buf_len,
381 int timeout)
382{
383 struct rtsx_pcr *pcr = host->pcr;
384 int err;
385
386 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
387 __func__, cmd->opcode, cmd->arg);
388
389 if (!buf)
390 buf_len = 0;
391
392 sd_send_cmd_get_rsp(host, cmd);
393 if (cmd->error)
394 return cmd->error;
395
396 if (buf && buf_len) {
397 err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
398 if (err < 0) {
399 dev_dbg(sdmmc_dev(host),
400 "rtsx_pci_write_ppbuf fail (err = %d)\n", err);
401 return err;
402 }
403 }
404
405 rtsx_pci_init_cmd(pcr);
406 sd_cmd_set_data_len(pcr, 1, byte_cnt);
407 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
408 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
409 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0);
410 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
411 SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
412 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
413 SD_TRANSFER_END, SD_TRANSFER_END);
414
415 err = rtsx_pci_send_cmd(pcr, timeout);
416 if (err < 0) {
417 sd_print_debug_regs(host);
418 dev_dbg(sdmmc_dev(host),
419 "rtsx_pci_send_cmd fail (err = %d)\n", err);
420 return err;
421 }
422
423 return 0;
424}
425
426static int sd_read_long_data(struct realtek_pci_sdmmc *host,
427 struct mmc_request *mrq)
428{
429 struct rtsx_pcr *pcr = host->pcr;
430 struct mmc_host *mmc = host->mmc;
431 struct mmc_card *card = mmc->card;
432 struct mmc_command *cmd = mrq->cmd;
433 struct mmc_data *data = mrq->data;
434 int uhs = mmc_card_uhs(card);
435 u8 cfg2 = 0;
436 int err;
437 int resp_type;
438 size_t data_len = data->blksz * data->blocks;
439
440 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
441 __func__, cmd->opcode, cmd->arg);
442
443 resp_type = sd_response_type(cmd);
444 if (resp_type < 0)
445 return resp_type;
446
447 if (!uhs)
448 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
449
450 rtsx_pci_init_cmd(pcr);
451 sd_cmd_set_sd_cmd(pcr, cmd);
452 sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
453 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
454 DMA_DONE_INT, DMA_DONE_INT);
455 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
456 0xFF, (u8)(data_len >> 24));
457 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
458 0xFF, (u8)(data_len >> 16));
459 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
460 0xFF, (u8)(data_len >> 8));
461 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
462 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
463 0x03 | DMA_PACK_SIZE_MASK,
464 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
465 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
466 0x01, RING_BUFFER);
467 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2 | resp_type);
468 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
469 SD_TRANSFER_START | SD_TM_AUTO_READ_2);
470 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
471 SD_TRANSFER_END, SD_TRANSFER_END);
472 rtsx_pci_send_cmd_no_wait(pcr);
473
474 err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 1, 10000);
475 if (err < 0) {
476 sd_print_debug_regs(host);
477 sd_clear_error(host);
478 return err;
479 }
480
481 return 0;
482}
483
484static int sd_write_long_data(struct realtek_pci_sdmmc *host,
485 struct mmc_request *mrq)
486{
487 struct rtsx_pcr *pcr = host->pcr;
488 struct mmc_host *mmc = host->mmc;
489 struct mmc_card *card = mmc->card;
490 struct mmc_command *cmd = mrq->cmd;
491 struct mmc_data *data = mrq->data;
492 int uhs = mmc_card_uhs(card);
493 u8 cfg2;
494 int err;
495 size_t data_len = data->blksz * data->blocks;
496
497 sd_send_cmd_get_rsp(host, cmd);
498 if (cmd->error)
499 return cmd->error;
500
501 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
502 __func__, cmd->opcode, cmd->arg);
503
504 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
505 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
506
507 if (!uhs)
508 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
509
510 rtsx_pci_init_cmd(pcr);
511 sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
512 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
513 DMA_DONE_INT, DMA_DONE_INT);
514 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
515 0xFF, (u8)(data_len >> 24));
516 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
517 0xFF, (u8)(data_len >> 16));
518 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
519 0xFF, (u8)(data_len >> 8));
520 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
521 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
522 0x03 | DMA_PACK_SIZE_MASK,
523 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
524 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
525 0x01, RING_BUFFER);
526 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
527 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
528 SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
529 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
530 SD_TRANSFER_END, SD_TRANSFER_END);
531 rtsx_pci_send_cmd_no_wait(pcr);
532 err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 0, 10000);
533 if (err < 0) {
534 sd_clear_error(host);
535 return err;
536 }
537
538 return 0;
539}
540
541static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
542{
543 rtsx_pci_write_register(host->pcr, SD_CFG1,
544 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
545}
546
547static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
548{
549 rtsx_pci_write_register(host->pcr, SD_CFG1,
550 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
551}
552
553static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
554{
555 struct mmc_data *data = mrq->data;
556 int err;
557
558 if (host->sg_count < 0) {
559 data->error = host->sg_count;
560 dev_dbg(sdmmc_dev(host), "%s: sg_count = %d is invalid\n",
561 __func__, host->sg_count);
562 return data->error;
563 }
564
565 if (data->flags & MMC_DATA_READ) {
566 if (host->initial_mode)
567 sd_disable_initial_mode(host);
568
569 err = sd_read_long_data(host, mrq);
570
571 if (host->initial_mode)
572 sd_enable_initial_mode(host);
573
574 return err;
575 }
576
577 return sd_write_long_data(host, mrq);
578}
579
580static void sd_normal_rw(struct realtek_pci_sdmmc *host,
581 struct mmc_request *mrq)
582{
583 struct mmc_command *cmd = mrq->cmd;
584 struct mmc_data *data = mrq->data;
585 u8 *buf;
586
587 buf = kzalloc(data->blksz, GFP_NOIO);
588 if (!buf) {
589 cmd->error = -ENOMEM;
590 return;
591 }
592
593 if (data->flags & MMC_DATA_READ) {
594 if (host->initial_mode)
595 sd_disable_initial_mode(host);
596
597 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
598 data->blksz, 200);
599
600 if (host->initial_mode)
601 sd_enable_initial_mode(host);
602
603 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
604 } else {
605 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
606
607 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
608 data->blksz, 200);
609 }
610
611 kfree(buf);
612}
613
614static int sd_change_phase(struct realtek_pci_sdmmc *host,
615 u8 sample_point, bool rx)
616{
617 struct rtsx_pcr *pcr = host->pcr;
618 u16 SD_VP_CTL = 0;
619 dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
620 __func__, rx ? "RX" : "TX", sample_point);
621
622 rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
623 if (rx) {
624 SD_VP_CTL = SD_VPRX_CTL;
625 rtsx_pci_write_register(pcr, SD_VPRX_CTL,
626 PHASE_SELECT_MASK, sample_point);
627 } else {
628 SD_VP_CTL = SD_VPTX_CTL;
629 rtsx_pci_write_register(pcr, SD_VPTX_CTL,
630 PHASE_SELECT_MASK, sample_point);
631 }
632 rtsx_pci_write_register(pcr, SD_VP_CTL, PHASE_NOT_RESET, 0);
633 rtsx_pci_write_register(pcr, SD_VP_CTL, PHASE_NOT_RESET,
634 PHASE_NOT_RESET);
635 rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, 0);
636 rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
637
638 return 0;
639}
640
641static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
642{
643 bit %= RTSX_PHASE_MAX;
644 return phase_map & (1 << bit);
645}
646
647static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
648{
649 int i;
650
651 for (i = 0; i < RTSX_PHASE_MAX; i++) {
652 if (test_phase_bit(phase_map, start_bit + i) == 0)
653 return i;
654 }
655 return RTSX_PHASE_MAX;
656}
657
658static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
659{
660 int start = 0, len = 0;
661 int start_final = 0, len_final = 0;
662 u8 final_phase = 0xFF;
663
664 if (phase_map == 0) {
665 dev_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
666 return final_phase;
667 }
668
669 while (start < RTSX_PHASE_MAX) {
670 len = sd_get_phase_len(phase_map, start);
671 if (len_final < len) {
672 start_final = start;
673 len_final = len;
674 }
675 start += len ? len : 1;
676 }
677
678 final_phase = (start_final + len_final / 2) % RTSX_PHASE_MAX;
679 dev_dbg(sdmmc_dev(host), "phase: [map:%x] [maxlen:%d] [final:%d]\n",
680 phase_map, len_final, final_phase);
681
682 return final_phase;
683}
684
685static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
686{
687 int i;
688 u8 val = 0;
689
690 for (i = 0; i < 100; i++) {
691 rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
692 if (val & SD_DATA_IDLE)
693 return;
694
695 udelay(100);
696 }
697}
698
699static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
700 u8 opcode, u8 sample_point)
701{
702 int err;
703 struct mmc_command cmd = {};
704 struct rtsx_pcr *pcr = host->pcr;
705
706 sd_change_phase(host, sample_point, true);
707
708 rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN,
709 SD_RSP_80CLK_TIMEOUT_EN);
710
711 cmd.opcode = opcode;
712 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
713 if (err < 0) {
714 /* Wait till SD DATA IDLE */
715 sd_wait_data_idle(host);
716 sd_clear_error(host);
717 rtsx_pci_write_register(pcr, SD_CFG3,
718 SD_RSP_80CLK_TIMEOUT_EN, 0);
719 return err;
720 }
721
722 rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN, 0);
723 return 0;
724}
725
726static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
727 u8 opcode, u32 *phase_map)
728{
729 int err, i;
730 u32 raw_phase_map = 0;
731
732 for (i = 0; i < RTSX_PHASE_MAX; i++) {
733 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
734 if (err == 0)
735 raw_phase_map |= 1 << i;
736 }
737
738 if (phase_map)
739 *phase_map = raw_phase_map;
740
741 return 0;
742}
743
744static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
745{
746 int err, i;
747 u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
748 u8 final_phase;
749
750 for (i = 0; i < RX_TUNING_CNT; i++) {
751 err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
752 if (err < 0)
753 return err;
754
755 if (raw_phase_map[i] == 0)
756 break;
757 }
758
759 phase_map = 0xFFFFFFFF;
760 for (i = 0; i < RX_TUNING_CNT; i++) {
761 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
762 i, raw_phase_map[i]);
763 phase_map &= raw_phase_map[i];
764 }
765 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\n", phase_map);
766
767 if (phase_map) {
768 final_phase = sd_search_final_phase(host, phase_map);
769 if (final_phase == 0xFF)
770 return -EINVAL;
771
772 err = sd_change_phase(host, final_phase, true);
773 if (err < 0)
774 return err;
775 } else {
776 return -EINVAL;
777 }
778
779 return 0;
780}
781
782static inline int sdio_extblock_cmd(struct mmc_command *cmd,
783 struct mmc_data *data)
784{
785 return (cmd->opcode == SD_IO_RW_EXTENDED) && (data->blksz == 512);
786}
787
788static inline int sd_rw_cmd(struct mmc_command *cmd)
789{
790 return mmc_op_multi(cmd->opcode) ||
791 (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
792 (cmd->opcode == MMC_WRITE_BLOCK);
793}
794
795static void sd_request(struct work_struct *work)
796{
797 struct realtek_pci_sdmmc *host = container_of(work,
798 struct realtek_pci_sdmmc, work);
799 struct rtsx_pcr *pcr = host->pcr;
800
801 struct mmc_host *mmc = host->mmc;
802 struct mmc_request *mrq = host->mrq;
803 struct mmc_command *cmd = mrq->cmd;
804 struct mmc_data *data = mrq->data;
805
806 unsigned int data_size = 0;
807 int err;
808
809 if (host->eject || !sd_get_cd_int(host)) {
810 cmd->error = -ENOMEDIUM;
811 goto finish;
812 }
813
814 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
815 if (err) {
816 cmd->error = err;
817 goto finish;
818 }
819
820 mutex_lock(&pcr->pcr_mutex);
821
822 rtsx_pci_start_run(pcr);
823
824 rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
825 host->initial_mode, host->double_clk, host->vpclk);
826 rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
827 rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
828 CARD_SHARE_MASK, CARD_SHARE_48_SD);
829
830 mutex_lock(&host->host_mutex);
831 host->mrq = mrq;
832 mutex_unlock(&host->host_mutex);
833
834 if (mrq->data)
835 data_size = data->blocks * data->blksz;
836
837 if (!data_size) {
838 sd_send_cmd_get_rsp(host, cmd);
839 } else if (sd_rw_cmd(cmd) || sdio_extblock_cmd(cmd, data)) {
840 cmd->error = sd_rw_multi(host, mrq);
841 if (!host->using_cookie)
842 sdmmc_post_req(host->mmc, host->mrq, 0);
843
844 if (mmc_op_multi(cmd->opcode) && mrq->stop)
845 sd_send_cmd_get_rsp(host, mrq->stop);
846 } else {
847 sd_normal_rw(host, mrq);
848 }
849
850 if (mrq->data) {
851 if (cmd->error || data->error)
852 data->bytes_xfered = 0;
853 else
854 data->bytes_xfered = data->blocks * data->blksz;
855 }
856
857 mutex_unlock(&pcr->pcr_mutex);
858
859finish:
860 if (cmd->error) {
861 dev_dbg(sdmmc_dev(host), "CMD %d 0x%08x error(%d)\n",
862 cmd->opcode, cmd->arg, cmd->error);
863 }
864
865 mutex_lock(&host->host_mutex);
866 host->mrq = NULL;
867 mutex_unlock(&host->host_mutex);
868
869 mmc_request_done(mmc, mrq);
870}
871
872static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
873{
874 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
875 struct mmc_data *data = mrq->data;
876
877 mutex_lock(&host->host_mutex);
878 host->mrq = mrq;
879 mutex_unlock(&host->host_mutex);
880
881 if (sd_rw_cmd(mrq->cmd) || sdio_extblock_cmd(mrq->cmd, data))
882 host->using_cookie = sd_pre_dma_transfer(host, data, false);
883
884 schedule_work(&host->work);
885}
886
887static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
888 unsigned char bus_width)
889{
890 int err = 0;
891 u8 width[] = {
892 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
893 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
894 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
895 };
896
897 if (bus_width <= MMC_BUS_WIDTH_8)
898 err = rtsx_pci_write_register(host->pcr, SD_CFG1,
899 0x03, width[bus_width]);
900
901 return err;
902}
903
904static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
905{
906 struct rtsx_pcr *pcr = host->pcr;
907 struct mmc_host *mmc = host->mmc;
908 int err;
909 u32 val;
910 u8 test_mode;
911
912 if (host->prev_power_state == MMC_POWER_ON)
913 return 0;
914
915 if (host->prev_power_state == MMC_POWER_UP) {
916 rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, 0);
917 goto finish;
918 }
919
920 msleep(100);
921
922 rtsx_pci_init_cmd(pcr);
923 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
924 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
925 CARD_SHARE_MASK, CARD_SHARE_48_SD);
926 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
927 SD_CLK_EN, SD_CLK_EN);
928 err = rtsx_pci_send_cmd(pcr, 100);
929 if (err < 0)
930 return err;
931
932 err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
933 if (err < 0)
934 return err;
935
936 err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
937 if (err < 0)
938 return err;
939
940 mdelay(1);
941
942 err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
943 if (err < 0)
944 return err;
945
946 /* send at least 74 clocks */
947 rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, SD_CLK_TOGGLE_EN);
948
949 if ((PCI_PID(pcr) == PID_5261) || (PCI_PID(pcr) == PID_5264)) {
950 /*
951 * If test mode is set switch to SD Express mandatorily,
952 * this is only for factory testing.
953 */
954 rtsx_pci_read_register(pcr, RTS5261_FW_CFG_INFO0, &test_mode);
955 if (test_mode & RTS5261_FW_EXPRESS_TEST_MASK) {
956 sdmmc_init_sd_express(mmc, NULL);
957 return 0;
958 }
959 if (pcr->extra_caps & EXTRA_CAPS_SD_EXPRESS)
960 mmc->caps2 |= MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V;
961 /*
962 * HW read wp status when resuming from S3/S4,
963 * and then picks SD legacy interface if it's set
964 * in read-only mode.
965 */
966 val = rtsx_pci_readl(pcr, RTSX_BIPR);
967 if (val & SD_WRITE_PROTECT) {
968 pcr->extra_caps &= ~EXTRA_CAPS_SD_EXPRESS;
969 mmc->caps2 &= ~(MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V);
970 }
971 }
972
973finish:
974 host->prev_power_state = power_mode;
975 return 0;
976}
977
978static int sd_power_off(struct realtek_pci_sdmmc *host)
979{
980 struct rtsx_pcr *pcr = host->pcr;
981 int err;
982
983 host->prev_power_state = MMC_POWER_OFF;
984
985 rtsx_pci_init_cmd(pcr);
986
987 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
988 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
989
990 err = rtsx_pci_send_cmd(pcr, 100);
991 if (err < 0)
992 return err;
993
994 err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
995 if (err < 0)
996 return err;
997
998 return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
999}
1000
1001static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
1002 unsigned char power_mode)
1003{
1004 int err;
1005
1006 if (power_mode == MMC_POWER_OFF)
1007 err = sd_power_off(host);
1008 else
1009 err = sd_power_on(host, power_mode);
1010
1011 return err;
1012}
1013
1014static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
1015{
1016 struct rtsx_pcr *pcr = host->pcr;
1017 int err = 0;
1018
1019 rtsx_pci_init_cmd(pcr);
1020
1021 switch (timing) {
1022 case MMC_TIMING_UHS_SDR104:
1023 case MMC_TIMING_UHS_SDR50:
1024 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1025 0x0C | SD_ASYNC_FIFO_NOT_RST,
1026 SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
1027 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1028 CLK_LOW_FREQ, CLK_LOW_FREQ);
1029 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1030 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1031 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1032 break;
1033
1034 case MMC_TIMING_MMC_DDR52:
1035 case MMC_TIMING_UHS_DDR50:
1036 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1037 0x0C | SD_ASYNC_FIFO_NOT_RST,
1038 SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
1039 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1040 CLK_LOW_FREQ, CLK_LOW_FREQ);
1041 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1042 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1043 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1044 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1045 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1046 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1047 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1048 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1049 break;
1050
1051 case MMC_TIMING_MMC_HS:
1052 case MMC_TIMING_SD_HS:
1053 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1054 0x0C, SD_20_MODE);
1055 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1056 CLK_LOW_FREQ, CLK_LOW_FREQ);
1057 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1058 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1059 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1060 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1061 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1062 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1063 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1064 break;
1065
1066 default:
1067 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1068 SD_CFG1, 0x0C, SD_20_MODE);
1069 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1070 CLK_LOW_FREQ, CLK_LOW_FREQ);
1071 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1072 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1073 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1074 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1075 SD_PUSH_POINT_CTL, 0xFF, 0);
1076 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1077 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1078 break;
1079 }
1080
1081 err = rtsx_pci_send_cmd(pcr, 100);
1082
1083 return err;
1084}
1085
1086static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1087{
1088 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1089 struct rtsx_pcr *pcr = host->pcr;
1090
1091 if (host->eject)
1092 return;
1093
1094 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
1095 return;
1096
1097 mutex_lock(&pcr->pcr_mutex);
1098
1099 rtsx_pci_start_run(pcr);
1100
1101 sd_set_bus_width(host, ios->bus_width);
1102 sd_set_power_mode(host, ios->power_mode);
1103 sd_set_timing(host, ios->timing);
1104
1105 host->vpclk = false;
1106 host->double_clk = true;
1107
1108 switch (ios->timing) {
1109 case MMC_TIMING_UHS_SDR104:
1110 case MMC_TIMING_UHS_SDR50:
1111 host->ssc_depth = RTSX_SSC_DEPTH_2M;
1112 host->vpclk = true;
1113 host->double_clk = false;
1114 break;
1115 case MMC_TIMING_MMC_DDR52:
1116 case MMC_TIMING_UHS_DDR50:
1117 case MMC_TIMING_UHS_SDR25:
1118 host->ssc_depth = RTSX_SSC_DEPTH_1M;
1119 break;
1120 default:
1121 host->ssc_depth = RTSX_SSC_DEPTH_500K;
1122 break;
1123 }
1124
1125 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1126
1127 host->clock = ios->clock;
1128 rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
1129 host->initial_mode, host->double_clk, host->vpclk);
1130
1131 mutex_unlock(&pcr->pcr_mutex);
1132}
1133
1134static int sdmmc_get_ro(struct mmc_host *mmc)
1135{
1136 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1137 struct rtsx_pcr *pcr = host->pcr;
1138 int ro = 0;
1139 u32 val;
1140
1141 if (host->eject)
1142 return -ENOMEDIUM;
1143
1144 mutex_lock(&pcr->pcr_mutex);
1145
1146 rtsx_pci_start_run(pcr);
1147
1148 /* Check SD mechanical write-protect switch */
1149 val = rtsx_pci_readl(pcr, RTSX_BIPR);
1150 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1151 if (val & SD_WRITE_PROTECT)
1152 ro = 1;
1153
1154 mutex_unlock(&pcr->pcr_mutex);
1155
1156 return ro;
1157}
1158
1159static int sdmmc_get_cd(struct mmc_host *mmc)
1160{
1161 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1162 struct rtsx_pcr *pcr = host->pcr;
1163 int cd = 0;
1164 u32 val;
1165
1166 if (host->eject)
1167 return cd;
1168
1169 mutex_lock(&pcr->pcr_mutex);
1170
1171 rtsx_pci_start_run(pcr);
1172
1173 /* Check SD card detect */
1174 val = rtsx_pci_card_exist(pcr);
1175 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1176 if (val & SD_EXIST)
1177 cd = 1;
1178
1179 mutex_unlock(&pcr->pcr_mutex);
1180
1181 return cd;
1182}
1183
1184static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
1185{
1186 struct rtsx_pcr *pcr = host->pcr;
1187 int err;
1188 u8 stat;
1189
1190 /* Reference to Signal Voltage Switch Sequence in SD spec.
1191 * Wait for a period of time so that the card can drive SD_CMD and
1192 * SD_DAT[3:0] to low after sending back CMD11 response.
1193 */
1194 mdelay(1);
1195
1196 /* SD_CMD, SD_DAT[3:0] should be driven to low by card;
1197 * If either one of SD_CMD,SD_DAT[3:0] is not low,
1198 * abort the voltage switch sequence;
1199 */
1200 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1201 if (err < 0)
1202 return err;
1203
1204 if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1205 SD_DAT1_STATUS | SD_DAT0_STATUS))
1206 return -EINVAL;
1207
1208 /* Stop toggle SD clock */
1209 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1210 0xFF, SD_CLK_FORCE_STOP);
1211 if (err < 0)
1212 return err;
1213
1214 return 0;
1215}
1216
1217static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
1218{
1219 struct rtsx_pcr *pcr = host->pcr;
1220 int err;
1221 u8 stat, mask, val;
1222
1223 /* Wait 1.8V output of voltage regulator in card stable */
1224 msleep(50);
1225
1226 /* Toggle SD clock again */
1227 err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
1228 if (err < 0)
1229 return err;
1230
1231 /* Wait for a period of time so that the card can drive
1232 * SD_DAT[3:0] to high at 1.8V
1233 */
1234 msleep(20);
1235
1236 /* SD_CMD, SD_DAT[3:0] should be pulled high by host */
1237 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1238 if (err < 0)
1239 return err;
1240
1241 mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1242 SD_DAT1_STATUS | SD_DAT0_STATUS;
1243 val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1244 SD_DAT1_STATUS | SD_DAT0_STATUS;
1245 if ((stat & mask) != val) {
1246 dev_dbg(sdmmc_dev(host),
1247 "%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
1248 rtsx_pci_write_register(pcr, SD_BUS_STAT,
1249 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1250 rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
1251 return -EINVAL;
1252 }
1253
1254 return 0;
1255}
1256
1257static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1258{
1259 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1260 struct rtsx_pcr *pcr = host->pcr;
1261 int err = 0;
1262 u8 voltage;
1263
1264 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1265 __func__, ios->signal_voltage);
1266
1267 if (host->eject)
1268 return -ENOMEDIUM;
1269
1270 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1271 if (err)
1272 return err;
1273
1274 mutex_lock(&pcr->pcr_mutex);
1275
1276 rtsx_pci_start_run(pcr);
1277
1278 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
1279 voltage = OUTPUT_3V3;
1280 else
1281 voltage = OUTPUT_1V8;
1282
1283 if (voltage == OUTPUT_1V8) {
1284 err = sd_wait_voltage_stable_1(host);
1285 if (err < 0)
1286 goto out;
1287 }
1288
1289 err = rtsx_pci_switch_output_voltage(pcr, voltage);
1290 if (err < 0)
1291 goto out;
1292
1293 if (voltage == OUTPUT_1V8) {
1294 err = sd_wait_voltage_stable_2(host);
1295 if (err < 0)
1296 goto out;
1297 }
1298
1299out:
1300 /* Stop toggle SD clock in idle */
1301 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1302 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1303
1304 mutex_unlock(&pcr->pcr_mutex);
1305
1306 return err;
1307}
1308
1309static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1310{
1311 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1312 struct rtsx_pcr *pcr = host->pcr;
1313 int err = 0;
1314
1315 if (host->eject)
1316 return -ENOMEDIUM;
1317
1318 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1319 if (err)
1320 return err;
1321
1322 mutex_lock(&pcr->pcr_mutex);
1323
1324 rtsx_pci_start_run(pcr);
1325
1326 /* Set initial TX phase */
1327 switch (mmc->ios.timing) {
1328 case MMC_TIMING_UHS_SDR104:
1329 err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
1330 break;
1331
1332 case MMC_TIMING_UHS_SDR50:
1333 err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
1334 break;
1335
1336 case MMC_TIMING_UHS_DDR50:
1337 err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
1338 break;
1339
1340 default:
1341 err = 0;
1342 }
1343
1344 if (err)
1345 goto out;
1346
1347 /* Tuning RX phase */
1348 if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
1349 (mmc->ios.timing == MMC_TIMING_UHS_SDR50))
1350 err = sd_tuning_rx(host, opcode);
1351 else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
1352 err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
1353
1354out:
1355 mutex_unlock(&pcr->pcr_mutex);
1356
1357 return err;
1358}
1359
1360static int sdmmc_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
1361{
1362 u32 relink_time;
1363 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1364 struct rtsx_pcr *pcr = host->pcr;
1365
1366 if (PCI_PID(pcr) == PID_5264) {
1367 pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL2,
1368 PCI_EXP_LNKCTL2_TLS, PCI_EXP_LNKCTL2_TLS_2_5GT);
1369 pci_write_config_byte(pcr->pci, 0x80e, 0x02);
1370 pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL2,
1371 PCI_EXP_LNKCTL2_TLS, PCI_EXP_LNKCTL2_TLS_5_0GT);
1372 }
1373
1374 /* Set relink_time for changing to PCIe card */
1375 relink_time = 0x8FFF;
1376
1377 rtsx_pci_write_register(pcr, 0xFF01, 0xFF, relink_time);
1378 rtsx_pci_write_register(pcr, 0xFF02, 0xFF, relink_time >> 8);
1379 rtsx_pci_write_register(pcr, 0xFF03, 0x01, relink_time >> 16);
1380
1381 rtsx_pci_write_register(pcr, PETXCFG, 0x80, 0x80);
1382 rtsx_pci_write_register(pcr, LDO_VCC_CFG0,
1383 RTS5261_LDO1_OCP_THD_MASK,
1384 pcr->option.sd_800mA_ocp_thd);
1385
1386 if (pcr->ops->disable_auto_blink)
1387 pcr->ops->disable_auto_blink(pcr);
1388
1389 if (PCI_PID(pcr) == PID_5264) {
1390 rtsx_pci_write_register(pcr, RTS5264_AUTOLOAD_CFG2,
1391 RTS5264_CHIP_RST_N_SEL, RTS5264_CHIP_RST_N_SEL);
1392 rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
1393 }
1394
1395 /* For PCIe/NVMe mode can't enter delink issue */
1396 pcr->hw_param.interrupt_en &= ~(SD_INT_EN);
1397 rtsx_pci_writel(pcr, RTSX_BIER, pcr->hw_param.interrupt_en);
1398
1399 rtsx_pci_write_register(pcr, RTS5260_AUTOLOAD_CFG4,
1400 RTS5261_AUX_CLK_16M_EN, RTS5261_AUX_CLK_16M_EN);
1401 rtsx_pci_write_register(pcr, RTS5261_FW_CFG0,
1402 RTS5261_FW_ENTER_EXPRESS, RTS5261_FW_ENTER_EXPRESS);
1403 rtsx_pci_write_register(pcr, RTS5261_FW_CFG1,
1404 RTS5261_MCU_CLOCK_GATING, RTS5261_MCU_CLOCK_GATING);
1405 rtsx_pci_write_register(pcr, RTS5261_FW_CFG1,
1406 RTS5261_MCU_BUS_SEL_MASK | RTS5261_MCU_CLOCK_SEL_MASK
1407 | RTS5261_DRIVER_ENABLE_FW,
1408 RTS5261_MCU_CLOCK_SEL_16M | RTS5261_DRIVER_ENABLE_FW);
1409 host->eject = true;
1410 return 0;
1411}
1412
1413static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
1414 .pre_req = sdmmc_pre_req,
1415 .post_req = sdmmc_post_req,
1416 .request = sdmmc_request,
1417 .set_ios = sdmmc_set_ios,
1418 .get_ro = sdmmc_get_ro,
1419 .get_cd = sdmmc_get_cd,
1420 .start_signal_voltage_switch = sdmmc_switch_voltage,
1421 .execute_tuning = sdmmc_execute_tuning,
1422 .init_sd_express = sdmmc_init_sd_express,
1423};
1424
1425static void init_extra_caps(struct realtek_pci_sdmmc *host)
1426{
1427 struct mmc_host *mmc = host->mmc;
1428 struct rtsx_pcr *pcr = host->pcr;
1429
1430 dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
1431
1432 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
1433 mmc->caps |= MMC_CAP_UHS_SDR50;
1434 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
1435 mmc->caps |= MMC_CAP_UHS_SDR104;
1436 if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
1437 mmc->caps |= MMC_CAP_UHS_DDR50;
1438 if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
1439 mmc->caps |= MMC_CAP_1_8V_DDR;
1440 if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
1441 mmc->caps |= MMC_CAP_8_BIT_DATA;
1442 if (pcr->extra_caps & EXTRA_CAPS_NO_MMC)
1443 mmc->caps2 |= MMC_CAP2_NO_MMC;
1444 if (pcr->extra_caps & EXTRA_CAPS_SD_EXPRESS)
1445 mmc->caps2 |= MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V;
1446}
1447
1448static void realtek_init_host(struct realtek_pci_sdmmc *host)
1449{
1450 struct mmc_host *mmc = host->mmc;
1451 struct rtsx_pcr *pcr = host->pcr;
1452
1453 mmc->f_min = 250000;
1454 mmc->f_max = 208000000;
1455 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1456 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1457 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1458 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
1459 if (pcr->rtd3_en)
1460 mmc->caps = mmc->caps | MMC_CAP_AGGRESSIVE_PM;
1461 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
1462 MMC_CAP2_NO_SDIO;
1463 mmc->max_current_330 = 400;
1464 mmc->max_current_180 = 800;
1465 mmc->ops = &realtek_pci_sdmmc_ops;
1466
1467 init_extra_caps(host);
1468
1469 mmc->max_segs = 256;
1470 mmc->max_seg_size = 65536;
1471 mmc->max_blk_size = 512;
1472 mmc->max_blk_count = 65535;
1473 mmc->max_req_size = 524288;
1474}
1475
1476static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
1477{
1478 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1479
1480 host->cookie = -1;
1481 mmc_detect_change(host->mmc, 0);
1482}
1483
1484static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
1485{
1486 struct mmc_host *mmc;
1487 struct realtek_pci_sdmmc *host;
1488 struct rtsx_pcr *pcr;
1489 struct pcr_handle *handle = pdev->dev.platform_data;
1490 int ret;
1491
1492 if (!handle)
1493 return -ENXIO;
1494
1495 pcr = handle->pcr;
1496 if (!pcr)
1497 return -ENXIO;
1498
1499 dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
1500
1501 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1502 if (!mmc)
1503 return -ENOMEM;
1504
1505 host = mmc_priv(mmc);
1506 host->pcr = pcr;
1507 mmc->ios.power_delay_ms = 5;
1508 host->mmc = mmc;
1509 host->pdev = pdev;
1510 host->cookie = -1;
1511 host->prev_power_state = MMC_POWER_OFF;
1512 INIT_WORK(&host->work, sd_request);
1513 platform_set_drvdata(pdev, host);
1514 pcr->slots[RTSX_SD_CARD].p_dev = pdev;
1515 pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
1516
1517 mutex_init(&host->host_mutex);
1518
1519 realtek_init_host(host);
1520
1521 pm_runtime_no_callbacks(&pdev->dev);
1522 pm_runtime_set_active(&pdev->dev);
1523 pm_runtime_enable(&pdev->dev);
1524 pm_runtime_set_autosuspend_delay(&pdev->dev, 200);
1525 pm_runtime_mark_last_busy(&pdev->dev);
1526 pm_runtime_use_autosuspend(&pdev->dev);
1527
1528 ret = mmc_add_host(mmc);
1529 if (ret) {
1530 pm_runtime_dont_use_autosuspend(&pdev->dev);
1531 pm_runtime_disable(&pdev->dev);
1532 mmc_free_host(mmc);
1533 return ret;
1534 }
1535
1536 return 0;
1537}
1538
1539static void rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
1540{
1541 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1542 struct rtsx_pcr *pcr;
1543 struct mmc_host *mmc;
1544
1545 pcr = host->pcr;
1546 pcr->slots[RTSX_SD_CARD].p_dev = NULL;
1547 pcr->slots[RTSX_SD_CARD].card_event = NULL;
1548 mmc = host->mmc;
1549
1550 cancel_work_sync(&host->work);
1551
1552 mutex_lock(&host->host_mutex);
1553 if (host->mrq) {
1554 dev_dbg(&(pdev->dev),
1555 "%s: Controller removed during transfer\n",
1556 mmc_hostname(mmc));
1557
1558 rtsx_pci_complete_unfinished_transfer(pcr);
1559
1560 host->mrq->cmd->error = -ENOMEDIUM;
1561 if (host->mrq->stop)
1562 host->mrq->stop->error = -ENOMEDIUM;
1563 mmc_request_done(mmc, host->mrq);
1564 }
1565 mutex_unlock(&host->host_mutex);
1566
1567 mmc_remove_host(mmc);
1568 host->eject = true;
1569
1570 flush_work(&host->work);
1571
1572 pm_runtime_dont_use_autosuspend(&pdev->dev);
1573 pm_runtime_disable(&pdev->dev);
1574
1575 mmc_free_host(mmc);
1576
1577 dev_dbg(&(pdev->dev),
1578 ": Realtek PCI-E SDMMC controller has been removed\n");
1579}
1580
1581static const struct platform_device_id rtsx_pci_sdmmc_ids[] = {
1582 {
1583 .name = DRV_NAME_RTSX_PCI_SDMMC,
1584 }, {
1585 /* sentinel */
1586 }
1587};
1588MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
1589
1590static struct platform_driver rtsx_pci_sdmmc_driver = {
1591 .probe = rtsx_pci_sdmmc_drv_probe,
1592 .remove = rtsx_pci_sdmmc_drv_remove,
1593 .id_table = rtsx_pci_sdmmc_ids,
1594 .driver = {
1595 .name = DRV_NAME_RTSX_PCI_SDMMC,
1596 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1597 },
1598};
1599module_platform_driver(rtsx_pci_sdmmc_driver);
1600
1601MODULE_LICENSE("GPL");
1602MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1603MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");
Linux 6.x block layer and io_uring tree(s)