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1/* Realtek PCI-Express SD/MMC Card Interface driver
2 *
3 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2, or (at your option) any
8 * later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 * Author:
19 * Wei WANG <wei_wang@realsil.com.cn>
20 */
21
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/highmem.h>
25#include <linux/delay.h>
26#include <linux/platform_device.h>
27#include <linux/workqueue.h>
28#include <linux/mmc/host.h>
29#include <linux/mmc/mmc.h>
30#include <linux/mmc/sd.h>
31#include <linux/mmc/sdio.h>
32#include <linux/mmc/card.h>
33#include <linux/mfd/rtsx_pci.h>
34#include <asm/unaligned.h>
35
36struct realtek_pci_sdmmc {
37 struct platform_device *pdev;
38 struct rtsx_pcr *pcr;
39 struct mmc_host *mmc;
40 struct mmc_request *mrq;
41 struct workqueue_struct *workq;
42#define SDMMC_WORKQ_NAME "rtsx_pci_sdmmc_workq"
43
44 struct work_struct work;
45 struct mutex host_mutex;
46
47 u8 ssc_depth;
48 unsigned int clock;
49 bool vpclk;
50 bool double_clk;
51 bool eject;
52 bool initial_mode;
53 int power_state;
54#define SDMMC_POWER_ON 1
55#define SDMMC_POWER_OFF 0
56
57 int sg_count;
58 s32 cookie;
59 int cookie_sg_count;
60 bool using_cookie;
61};
62
63static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
64{
65 return &(host->pdev->dev);
66}
67
68static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
69{
70 rtsx_pci_write_register(host->pcr, CARD_STOP,
71 SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
72}
73
74#ifdef DEBUG
75static void dump_reg_range(struct realtek_pci_sdmmc *host, u16 start, u16 end)
76{
77 u16 len = end - start + 1;
78 int i;
79 u8 data[8];
80
81 for (i = 0; i < len; i += 8) {
82 int j;
83 int n = min(8, len - i);
84
85 memset(&data, 0, sizeof(data));
86 for (j = 0; j < n; j++)
87 rtsx_pci_read_register(host->pcr, start + i + j,
88 data + j);
89 dev_dbg(sdmmc_dev(host), "0x%04X(%d): %8ph\n",
90 start + i, n, data);
91 }
92}
93
94static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
95{
96 dump_reg_range(host, 0xFDA0, 0xFDB3);
97 dump_reg_range(host, 0xFD52, 0xFD69);
98}
99#else
100#define sd_print_debug_regs(host)
101#endif /* DEBUG */
102
103static inline int sd_get_cd_int(struct realtek_pci_sdmmc *host)
104{
105 return rtsx_pci_readl(host->pcr, RTSX_BIPR) & SD_EXIST;
106}
107
108static void sd_cmd_set_sd_cmd(struct rtsx_pcr *pcr, struct mmc_command *cmd)
109{
110 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF,
111 SD_CMD_START | cmd->opcode);
112 rtsx_pci_write_be32(pcr, SD_CMD1, cmd->arg);
113}
114
115static void sd_cmd_set_data_len(struct rtsx_pcr *pcr, u16 blocks, u16 blksz)
116{
117 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, blocks);
118 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, blocks >> 8);
119 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, blksz);
120 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, blksz >> 8);
121}
122
123static int sd_response_type(struct mmc_command *cmd)
124{
125 switch (mmc_resp_type(cmd)) {
126 case MMC_RSP_NONE:
127 return SD_RSP_TYPE_R0;
128 case MMC_RSP_R1:
129 return SD_RSP_TYPE_R1;
130 case MMC_RSP_R1 & ~MMC_RSP_CRC:
131 return SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
132 case MMC_RSP_R1B:
133 return SD_RSP_TYPE_R1b;
134 case MMC_RSP_R2:
135 return SD_RSP_TYPE_R2;
136 case MMC_RSP_R3:
137 return SD_RSP_TYPE_R3;
138 default:
139 return -EINVAL;
140 }
141}
142
143static int sd_status_index(int resp_type)
144{
145 if (resp_type == SD_RSP_TYPE_R0)
146 return 0;
147 else if (resp_type == SD_RSP_TYPE_R2)
148 return 16;
149
150 return 5;
151}
152/*
153 * sd_pre_dma_transfer - do dma_map_sg() or using cookie
154 *
155 * @pre: if called in pre_req()
156 * return:
157 * 0 - do dma_map_sg()
158 * 1 - using cookie
159 */
160static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
161 struct mmc_data *data, bool pre)
162{
163 struct rtsx_pcr *pcr = host->pcr;
164 int read = data->flags & MMC_DATA_READ;
165 int count = 0;
166 int using_cookie = 0;
167
168 if (!pre && data->host_cookie && data->host_cookie != host->cookie) {
169 dev_err(sdmmc_dev(host),
170 "error: data->host_cookie = %d, host->cookie = %d\n",
171 data->host_cookie, host->cookie);
172 data->host_cookie = 0;
173 }
174
175 if (pre || data->host_cookie != host->cookie) {
176 count = rtsx_pci_dma_map_sg(pcr, data->sg, data->sg_len, read);
177 } else {
178 count = host->cookie_sg_count;
179 using_cookie = 1;
180 }
181
182 if (pre) {
183 host->cookie_sg_count = count;
184 if (++host->cookie < 0)
185 host->cookie = 1;
186 data->host_cookie = host->cookie;
187 } else {
188 host->sg_count = count;
189 }
190
191 return using_cookie;
192}
193
194static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
195 bool is_first_req)
196{
197 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
198 struct mmc_data *data = mrq->data;
199
200 if (data->host_cookie) {
201 dev_err(sdmmc_dev(host),
202 "error: reset data->host_cookie = %d\n",
203 data->host_cookie);
204 data->host_cookie = 0;
205 }
206
207 sd_pre_dma_transfer(host, data, true);
208 dev_dbg(sdmmc_dev(host), "pre dma sg: %d\n", host->cookie_sg_count);
209}
210
211static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
212 int err)
213{
214 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
215 struct rtsx_pcr *pcr = host->pcr;
216 struct mmc_data *data = mrq->data;
217 int read = data->flags & MMC_DATA_READ;
218
219 rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
220 data->host_cookie = 0;
221}
222
223static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
224 struct mmc_command *cmd)
225{
226 struct rtsx_pcr *pcr = host->pcr;
227 u8 cmd_idx = (u8)cmd->opcode;
228 u32 arg = cmd->arg;
229 int err = 0;
230 int timeout = 100;
231 int i;
232 u8 *ptr;
233 int rsp_type;
234 int stat_idx;
235 bool clock_toggled = false;
236
237 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
238 __func__, cmd_idx, arg);
239
240 rsp_type = sd_response_type(cmd);
241 if (rsp_type < 0)
242 goto out;
243
244 stat_idx = sd_status_index(rsp_type);
245
246 if (rsp_type == SD_RSP_TYPE_R1b)
247 timeout = 3000;
248
249 if (cmd->opcode == SD_SWITCH_VOLTAGE) {
250 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
251 0xFF, SD_CLK_TOGGLE_EN);
252 if (err < 0)
253 goto out;
254
255 clock_toggled = true;
256 }
257
258 rtsx_pci_init_cmd(pcr);
259 sd_cmd_set_sd_cmd(pcr, cmd);
260 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
261 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
262 0x01, PINGPONG_BUFFER);
263 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
264 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
265 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
266 SD_TRANSFER_END | SD_STAT_IDLE,
267 SD_TRANSFER_END | SD_STAT_IDLE);
268
269 if (rsp_type == SD_RSP_TYPE_R2) {
270 /* Read data from ping-pong buffer */
271 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
272 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
273 } else if (rsp_type != SD_RSP_TYPE_R0) {
274 /* Read data from SD_CMDx registers */
275 for (i = SD_CMD0; i <= SD_CMD4; i++)
276 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
277 }
278
279 rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
280
281 err = rtsx_pci_send_cmd(pcr, timeout);
282 if (err < 0) {
283 sd_print_debug_regs(host);
284 sd_clear_error(host);
285 dev_dbg(sdmmc_dev(host),
286 "rtsx_pci_send_cmd error (err = %d)\n", err);
287 goto out;
288 }
289
290 if (rsp_type == SD_RSP_TYPE_R0) {
291 err = 0;
292 goto out;
293 }
294
295 /* Eliminate returned value of CHECK_REG_CMD */
296 ptr = rtsx_pci_get_cmd_data(pcr) + 1;
297
298 /* Check (Start,Transmission) bit of Response */
299 if ((ptr[0] & 0xC0) != 0) {
300 err = -EILSEQ;
301 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
302 goto out;
303 }
304
305 /* Check CRC7 */
306 if (!(rsp_type & SD_NO_CHECK_CRC7)) {
307 if (ptr[stat_idx] & SD_CRC7_ERR) {
308 err = -EILSEQ;
309 dev_dbg(sdmmc_dev(host), "CRC7 error\n");
310 goto out;
311 }
312 }
313
314 if (rsp_type == SD_RSP_TYPE_R2) {
315 /*
316 * The controller offloads the last byte {CRC-7, end bit 1'b1}
317 * of response type R2. Assign dummy CRC, 0, and end bit to the
318 * byte(ptr[16], goes into the LSB of resp[3] later).
319 */
320 ptr[16] = 1;
321
322 for (i = 0; i < 4; i++) {
323 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
324 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
325 i, cmd->resp[i]);
326 }
327 } else {
328 cmd->resp[0] = get_unaligned_be32(ptr + 1);
329 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
330 cmd->resp[0]);
331 }
332
333out:
334 cmd->error = err;
335
336 if (err && clock_toggled)
337 rtsx_pci_write_register(pcr, SD_BUS_STAT,
338 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
339}
340
341static int sd_read_data(struct realtek_pci_sdmmc *host, struct mmc_command *cmd,
342 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
343{
344 struct rtsx_pcr *pcr = host->pcr;
345 int err;
346 u8 trans_mode;
347
348 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
349 __func__, cmd->opcode, cmd->arg);
350
351 if (!buf)
352 buf_len = 0;
353
354 if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
355 trans_mode = SD_TM_AUTO_TUNING;
356 else
357 trans_mode = SD_TM_NORMAL_READ;
358
359 rtsx_pci_init_cmd(pcr);
360 sd_cmd_set_sd_cmd(pcr, cmd);
361 sd_cmd_set_data_len(pcr, 1, byte_cnt);
362 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
363 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
364 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
365 if (trans_mode != SD_TM_AUTO_TUNING)
366 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
367 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
368
369 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
370 0xFF, trans_mode | SD_TRANSFER_START);
371 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
372 SD_TRANSFER_END, SD_TRANSFER_END);
373
374 err = rtsx_pci_send_cmd(pcr, timeout);
375 if (err < 0) {
376 sd_print_debug_regs(host);
377 dev_dbg(sdmmc_dev(host),
378 "rtsx_pci_send_cmd fail (err = %d)\n", err);
379 return err;
380 }
381
382 if (buf && buf_len) {
383 err = rtsx_pci_read_ppbuf(pcr, buf, buf_len);
384 if (err < 0) {
385 dev_dbg(sdmmc_dev(host),
386 "rtsx_pci_read_ppbuf fail (err = %d)\n", err);
387 return err;
388 }
389 }
390
391 return 0;
392}
393
394static int sd_write_data(struct realtek_pci_sdmmc *host,
395 struct mmc_command *cmd, u16 byte_cnt, u8 *buf, int buf_len,
396 int timeout)
397{
398 struct rtsx_pcr *pcr = host->pcr;
399 int err;
400
401 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
402 __func__, cmd->opcode, cmd->arg);
403
404 if (!buf)
405 buf_len = 0;
406
407 sd_send_cmd_get_rsp(host, cmd);
408 if (cmd->error)
409 return cmd->error;
410
411 if (buf && buf_len) {
412 err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
413 if (err < 0) {
414 dev_dbg(sdmmc_dev(host),
415 "rtsx_pci_write_ppbuf fail (err = %d)\n", err);
416 return err;
417 }
418 }
419
420 rtsx_pci_init_cmd(pcr);
421 sd_cmd_set_data_len(pcr, 1, byte_cnt);
422 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
423 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
424 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0);
425 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
426 SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
427 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
428 SD_TRANSFER_END, SD_TRANSFER_END);
429
430 err = rtsx_pci_send_cmd(pcr, timeout);
431 if (err < 0) {
432 sd_print_debug_regs(host);
433 dev_dbg(sdmmc_dev(host),
434 "rtsx_pci_send_cmd fail (err = %d)\n", err);
435 return err;
436 }
437
438 return 0;
439}
440
441static int sd_read_long_data(struct realtek_pci_sdmmc *host,
442 struct mmc_request *mrq)
443{
444 struct rtsx_pcr *pcr = host->pcr;
445 struct mmc_host *mmc = host->mmc;
446 struct mmc_card *card = mmc->card;
447 struct mmc_command *cmd = mrq->cmd;
448 struct mmc_data *data = mrq->data;
449 int uhs = mmc_card_uhs(card);
450 u8 cfg2 = 0;
451 int err;
452 int resp_type;
453 size_t data_len = data->blksz * data->blocks;
454
455 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
456 __func__, cmd->opcode, cmd->arg);
457
458 resp_type = sd_response_type(cmd);
459 if (resp_type < 0)
460 return resp_type;
461
462 if (!uhs)
463 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
464
465 rtsx_pci_init_cmd(pcr);
466 sd_cmd_set_sd_cmd(pcr, cmd);
467 sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
468 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
469 DMA_DONE_INT, DMA_DONE_INT);
470 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
471 0xFF, (u8)(data_len >> 24));
472 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
473 0xFF, (u8)(data_len >> 16));
474 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
475 0xFF, (u8)(data_len >> 8));
476 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
477 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
478 0x03 | DMA_PACK_SIZE_MASK,
479 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
480 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
481 0x01, RING_BUFFER);
482 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2 | resp_type);
483 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
484 SD_TRANSFER_START | SD_TM_AUTO_READ_2);
485 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
486 SD_TRANSFER_END, SD_TRANSFER_END);
487 rtsx_pci_send_cmd_no_wait(pcr);
488
489 err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 1, 10000);
490 if (err < 0) {
491 sd_print_debug_regs(host);
492 sd_clear_error(host);
493 return err;
494 }
495
496 return 0;
497}
498
499static int sd_write_long_data(struct realtek_pci_sdmmc *host,
500 struct mmc_request *mrq)
501{
502 struct rtsx_pcr *pcr = host->pcr;
503 struct mmc_host *mmc = host->mmc;
504 struct mmc_card *card = mmc->card;
505 struct mmc_command *cmd = mrq->cmd;
506 struct mmc_data *data = mrq->data;
507 int uhs = mmc_card_uhs(card);
508 u8 cfg2;
509 int err;
510 size_t data_len = data->blksz * data->blocks;
511
512 sd_send_cmd_get_rsp(host, cmd);
513 if (cmd->error)
514 return cmd->error;
515
516 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
517 __func__, cmd->opcode, cmd->arg);
518
519 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
520 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
521
522 if (!uhs)
523 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
524
525 rtsx_pci_init_cmd(pcr);
526 sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
527 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
528 DMA_DONE_INT, DMA_DONE_INT);
529 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
530 0xFF, (u8)(data_len >> 24));
531 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
532 0xFF, (u8)(data_len >> 16));
533 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
534 0xFF, (u8)(data_len >> 8));
535 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
536 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
537 0x03 | DMA_PACK_SIZE_MASK,
538 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
539 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
540 0x01, RING_BUFFER);
541 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
542 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
543 SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
544 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
545 SD_TRANSFER_END, SD_TRANSFER_END);
546 rtsx_pci_send_cmd_no_wait(pcr);
547 err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 0, 10000);
548 if (err < 0) {
549 sd_clear_error(host);
550 return err;
551 }
552
553 return 0;
554}
555
556static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
557{
558 struct mmc_data *data = mrq->data;
559
560 if (host->sg_count < 0) {
561 data->error = host->sg_count;
562 dev_dbg(sdmmc_dev(host), "%s: sg_count = %d is invalid\n",
563 __func__, host->sg_count);
564 return data->error;
565 }
566
567 if (data->flags & MMC_DATA_READ)
568 return sd_read_long_data(host, mrq);
569
570 return sd_write_long_data(host, mrq);
571}
572
573static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
574{
575 rtsx_pci_write_register(host->pcr, SD_CFG1,
576 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
577}
578
579static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
580{
581 rtsx_pci_write_register(host->pcr, SD_CFG1,
582 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
583}
584
585static void sd_normal_rw(struct realtek_pci_sdmmc *host,
586 struct mmc_request *mrq)
587{
588 struct mmc_command *cmd = mrq->cmd;
589 struct mmc_data *data = mrq->data;
590 u8 *buf;
591
592 buf = kzalloc(data->blksz, GFP_NOIO);
593 if (!buf) {
594 cmd->error = -ENOMEM;
595 return;
596 }
597
598 if (data->flags & MMC_DATA_READ) {
599 if (host->initial_mode)
600 sd_disable_initial_mode(host);
601
602 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
603 data->blksz, 200);
604
605 if (host->initial_mode)
606 sd_enable_initial_mode(host);
607
608 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
609 } else {
610 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
611
612 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
613 data->blksz, 200);
614 }
615
616 kfree(buf);
617}
618
619static int sd_change_phase(struct realtek_pci_sdmmc *host,
620 u8 sample_point, bool rx)
621{
622 struct rtsx_pcr *pcr = host->pcr;
623 int err;
624
625 dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
626 __func__, rx ? "RX" : "TX", sample_point);
627
628 rtsx_pci_init_cmd(pcr);
629
630 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
631 if (rx)
632 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
633 SD_VPRX_CTL, 0x1F, sample_point);
634 else
635 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
636 SD_VPTX_CTL, 0x1F, sample_point);
637 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
638 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
639 PHASE_NOT_RESET, PHASE_NOT_RESET);
640 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, 0);
641 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
642
643 err = rtsx_pci_send_cmd(pcr, 100);
644 if (err < 0)
645 return err;
646
647 return 0;
648}
649
650static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
651{
652 bit %= RTSX_PHASE_MAX;
653 return phase_map & (1 << bit);
654}
655
656static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
657{
658 int i;
659
660 for (i = 0; i < RTSX_PHASE_MAX; i++) {
661 if (test_phase_bit(phase_map, start_bit + i) == 0)
662 return i;
663 }
664 return RTSX_PHASE_MAX;
665}
666
667static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
668{
669 int start = 0, len = 0;
670 int start_final = 0, len_final = 0;
671 u8 final_phase = 0xFF;
672
673 if (phase_map == 0) {
674 dev_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
675 return final_phase;
676 }
677
678 while (start < RTSX_PHASE_MAX) {
679 len = sd_get_phase_len(phase_map, start);
680 if (len_final < len) {
681 start_final = start;
682 len_final = len;
683 }
684 start += len ? len : 1;
685 }
686
687 final_phase = (start_final + len_final / 2) % RTSX_PHASE_MAX;
688 dev_dbg(sdmmc_dev(host), "phase: [map:%x] [maxlen:%d] [final:%d]\n",
689 phase_map, len_final, final_phase);
690
691 return final_phase;
692}
693
694static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
695{
696 int err, i;
697 u8 val = 0;
698
699 for (i = 0; i < 100; i++) {
700 err = rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
701 if (val & SD_DATA_IDLE)
702 return;
703
704 udelay(100);
705 }
706}
707
708static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
709 u8 opcode, u8 sample_point)
710{
711 int err;
712 struct mmc_command cmd = {0};
713
714 err = sd_change_phase(host, sample_point, true);
715 if (err < 0)
716 return err;
717
718 cmd.opcode = opcode;
719 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
720 if (err < 0) {
721 /* Wait till SD DATA IDLE */
722 sd_wait_data_idle(host);
723 sd_clear_error(host);
724 return err;
725 }
726
727 return 0;
728}
729
730static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
731 u8 opcode, u32 *phase_map)
732{
733 int err, i;
734 u32 raw_phase_map = 0;
735
736 for (i = 0; i < RTSX_PHASE_MAX; i++) {
737 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
738 if (err == 0)
739 raw_phase_map |= 1 << i;
740 }
741
742 if (phase_map)
743 *phase_map = raw_phase_map;
744
745 return 0;
746}
747
748static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
749{
750 int err, i;
751 u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
752 u8 final_phase;
753
754 for (i = 0; i < RX_TUNING_CNT; i++) {
755 err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
756 if (err < 0)
757 return err;
758
759 if (raw_phase_map[i] == 0)
760 break;
761 }
762
763 phase_map = 0xFFFFFFFF;
764 for (i = 0; i < RX_TUNING_CNT; i++) {
765 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
766 i, raw_phase_map[i]);
767 phase_map &= raw_phase_map[i];
768 }
769 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\n", phase_map);
770
771 if (phase_map) {
772 final_phase = sd_search_final_phase(host, phase_map);
773 if (final_phase == 0xFF)
774 return -EINVAL;
775
776 err = sd_change_phase(host, final_phase, true);
777 if (err < 0)
778 return err;
779 } else {
780 return -EINVAL;
781 }
782
783 return 0;
784}
785
786static inline int sdio_extblock_cmd(struct mmc_command *cmd,
787 struct mmc_data *data)
788{
789 return (cmd->opcode == SD_IO_RW_EXTENDED) && (data->blksz == 512);
790}
791
792static inline int sd_rw_cmd(struct mmc_command *cmd)
793{
794 return mmc_op_multi(cmd->opcode) ||
795 (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
796 (cmd->opcode == MMC_WRITE_BLOCK);
797}
798
799static void sd_request(struct work_struct *work)
800{
801 struct realtek_pci_sdmmc *host = container_of(work,
802 struct realtek_pci_sdmmc, work);
803 struct rtsx_pcr *pcr = host->pcr;
804
805 struct mmc_host *mmc = host->mmc;
806 struct mmc_request *mrq = host->mrq;
807 struct mmc_command *cmd = mrq->cmd;
808 struct mmc_data *data = mrq->data;
809
810 unsigned int data_size = 0;
811 int err;
812
813 if (host->eject || !sd_get_cd_int(host)) {
814 cmd->error = -ENOMEDIUM;
815 goto finish;
816 }
817
818 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
819 if (err) {
820 cmd->error = err;
821 goto finish;
822 }
823
824 mutex_lock(&pcr->pcr_mutex);
825
826 rtsx_pci_start_run(pcr);
827
828 rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
829 host->initial_mode, host->double_clk, host->vpclk);
830 rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
831 rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
832 CARD_SHARE_MASK, CARD_SHARE_48_SD);
833
834 mutex_lock(&host->host_mutex);
835 host->mrq = mrq;
836 mutex_unlock(&host->host_mutex);
837
838 if (mrq->data)
839 data_size = data->blocks * data->blksz;
840
841 if (!data_size) {
842 sd_send_cmd_get_rsp(host, cmd);
843 } else if (sd_rw_cmd(cmd) || sdio_extblock_cmd(cmd, data)) {
844 cmd->error = sd_rw_multi(host, mrq);
845 if (!host->using_cookie)
846 sdmmc_post_req(host->mmc, host->mrq, 0);
847
848 if (mmc_op_multi(cmd->opcode) && mrq->stop)
849 sd_send_cmd_get_rsp(host, mrq->stop);
850 } else {
851 sd_normal_rw(host, mrq);
852 }
853
854 if (mrq->data) {
855 if (cmd->error || data->error)
856 data->bytes_xfered = 0;
857 else
858 data->bytes_xfered = data->blocks * data->blksz;
859 }
860
861 mutex_unlock(&pcr->pcr_mutex);
862
863finish:
864 if (cmd->error) {
865 dev_dbg(sdmmc_dev(host), "CMD %d 0x%08x error(%d)\n",
866 cmd->opcode, cmd->arg, cmd->error);
867 }
868
869 mutex_lock(&host->host_mutex);
870 host->mrq = NULL;
871 mutex_unlock(&host->host_mutex);
872
873 mmc_request_done(mmc, mrq);
874}
875
876static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
877{
878 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
879 struct mmc_data *data = mrq->data;
880
881 mutex_lock(&host->host_mutex);
882 host->mrq = mrq;
883 mutex_unlock(&host->host_mutex);
884
885 if (sd_rw_cmd(mrq->cmd) || sdio_extblock_cmd(mrq->cmd, data))
886 host->using_cookie = sd_pre_dma_transfer(host, data, false);
887
888 queue_work(host->workq, &host->work);
889}
890
891static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
892 unsigned char bus_width)
893{
894 int err = 0;
895 u8 width[] = {
896 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
897 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
898 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
899 };
900
901 if (bus_width <= MMC_BUS_WIDTH_8)
902 err = rtsx_pci_write_register(host->pcr, SD_CFG1,
903 0x03, width[bus_width]);
904
905 return err;
906}
907
908static int sd_power_on(struct realtek_pci_sdmmc *host)
909{
910 struct rtsx_pcr *pcr = host->pcr;
911 int err;
912
913 if (host->power_state == SDMMC_POWER_ON)
914 return 0;
915
916 rtsx_pci_init_cmd(pcr);
917 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
918 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
919 CARD_SHARE_MASK, CARD_SHARE_48_SD);
920 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
921 SD_CLK_EN, SD_CLK_EN);
922 err = rtsx_pci_send_cmd(pcr, 100);
923 if (err < 0)
924 return err;
925
926 err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
927 if (err < 0)
928 return err;
929
930 err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
931 if (err < 0)
932 return err;
933
934 err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
935 if (err < 0)
936 return err;
937
938 host->power_state = SDMMC_POWER_ON;
939 return 0;
940}
941
942static int sd_power_off(struct realtek_pci_sdmmc *host)
943{
944 struct rtsx_pcr *pcr = host->pcr;
945 int err;
946
947 host->power_state = SDMMC_POWER_OFF;
948
949 rtsx_pci_init_cmd(pcr);
950
951 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
952 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
953
954 err = rtsx_pci_send_cmd(pcr, 100);
955 if (err < 0)
956 return err;
957
958 err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
959 if (err < 0)
960 return err;
961
962 return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
963}
964
965static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
966 unsigned char power_mode)
967{
968 int err;
969
970 if (power_mode == MMC_POWER_OFF)
971 err = sd_power_off(host);
972 else
973 err = sd_power_on(host);
974
975 return err;
976}
977
978static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
979{
980 struct rtsx_pcr *pcr = host->pcr;
981 int err = 0;
982
983 rtsx_pci_init_cmd(pcr);
984
985 switch (timing) {
986 case MMC_TIMING_UHS_SDR104:
987 case MMC_TIMING_UHS_SDR50:
988 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
989 0x0C | SD_ASYNC_FIFO_NOT_RST,
990 SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
991 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
992 CLK_LOW_FREQ, CLK_LOW_FREQ);
993 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
994 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
995 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
996 break;
997
998 case MMC_TIMING_MMC_DDR52:
999 case MMC_TIMING_UHS_DDR50:
1000 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1001 0x0C | SD_ASYNC_FIFO_NOT_RST,
1002 SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
1003 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1004 CLK_LOW_FREQ, CLK_LOW_FREQ);
1005 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1006 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1007 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1008 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1009 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1010 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1011 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1012 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1013 break;
1014
1015 case MMC_TIMING_MMC_HS:
1016 case MMC_TIMING_SD_HS:
1017 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1018 0x0C, SD_20_MODE);
1019 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1020 CLK_LOW_FREQ, CLK_LOW_FREQ);
1021 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1022 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1023 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1024 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1025 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1026 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1027 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1028 break;
1029
1030 default:
1031 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1032 SD_CFG1, 0x0C, SD_20_MODE);
1033 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1034 CLK_LOW_FREQ, CLK_LOW_FREQ);
1035 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1036 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1037 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1038 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1039 SD_PUSH_POINT_CTL, 0xFF, 0);
1040 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1041 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1042 break;
1043 }
1044
1045 err = rtsx_pci_send_cmd(pcr, 100);
1046
1047 return err;
1048}
1049
1050static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1051{
1052 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1053 struct rtsx_pcr *pcr = host->pcr;
1054
1055 if (host->eject)
1056 return;
1057
1058 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
1059 return;
1060
1061 mutex_lock(&pcr->pcr_mutex);
1062
1063 rtsx_pci_start_run(pcr);
1064
1065 sd_set_bus_width(host, ios->bus_width);
1066 sd_set_power_mode(host, ios->power_mode);
1067 sd_set_timing(host, ios->timing);
1068
1069 host->vpclk = false;
1070 host->double_clk = true;
1071
1072 switch (ios->timing) {
1073 case MMC_TIMING_UHS_SDR104:
1074 case MMC_TIMING_UHS_SDR50:
1075 host->ssc_depth = RTSX_SSC_DEPTH_2M;
1076 host->vpclk = true;
1077 host->double_clk = false;
1078 break;
1079 case MMC_TIMING_MMC_DDR52:
1080 case MMC_TIMING_UHS_DDR50:
1081 case MMC_TIMING_UHS_SDR25:
1082 host->ssc_depth = RTSX_SSC_DEPTH_1M;
1083 break;
1084 default:
1085 host->ssc_depth = RTSX_SSC_DEPTH_500K;
1086 break;
1087 }
1088
1089 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1090
1091 host->clock = ios->clock;
1092 rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
1093 host->initial_mode, host->double_clk, host->vpclk);
1094
1095 mutex_unlock(&pcr->pcr_mutex);
1096}
1097
1098static int sdmmc_get_ro(struct mmc_host *mmc)
1099{
1100 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1101 struct rtsx_pcr *pcr = host->pcr;
1102 int ro = 0;
1103 u32 val;
1104
1105 if (host->eject)
1106 return -ENOMEDIUM;
1107
1108 mutex_lock(&pcr->pcr_mutex);
1109
1110 rtsx_pci_start_run(pcr);
1111
1112 /* Check SD mechanical write-protect switch */
1113 val = rtsx_pci_readl(pcr, RTSX_BIPR);
1114 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1115 if (val & SD_WRITE_PROTECT)
1116 ro = 1;
1117
1118 mutex_unlock(&pcr->pcr_mutex);
1119
1120 return ro;
1121}
1122
1123static int sdmmc_get_cd(struct mmc_host *mmc)
1124{
1125 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1126 struct rtsx_pcr *pcr = host->pcr;
1127 int cd = 0;
1128 u32 val;
1129
1130 if (host->eject)
1131 return cd;
1132
1133 mutex_lock(&pcr->pcr_mutex);
1134
1135 rtsx_pci_start_run(pcr);
1136
1137 /* Check SD card detect */
1138 val = rtsx_pci_card_exist(pcr);
1139 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1140 if (val & SD_EXIST)
1141 cd = 1;
1142
1143 mutex_unlock(&pcr->pcr_mutex);
1144
1145 return cd;
1146}
1147
1148static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
1149{
1150 struct rtsx_pcr *pcr = host->pcr;
1151 int err;
1152 u8 stat;
1153
1154 /* Reference to Signal Voltage Switch Sequence in SD spec.
1155 * Wait for a period of time so that the card can drive SD_CMD and
1156 * SD_DAT[3:0] to low after sending back CMD11 response.
1157 */
1158 mdelay(1);
1159
1160 /* SD_CMD, SD_DAT[3:0] should be driven to low by card;
1161 * If either one of SD_CMD,SD_DAT[3:0] is not low,
1162 * abort the voltage switch sequence;
1163 */
1164 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1165 if (err < 0)
1166 return err;
1167
1168 if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1169 SD_DAT1_STATUS | SD_DAT0_STATUS))
1170 return -EINVAL;
1171
1172 /* Stop toggle SD clock */
1173 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1174 0xFF, SD_CLK_FORCE_STOP);
1175 if (err < 0)
1176 return err;
1177
1178 return 0;
1179}
1180
1181static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
1182{
1183 struct rtsx_pcr *pcr = host->pcr;
1184 int err;
1185 u8 stat, mask, val;
1186
1187 /* Wait 1.8V output of voltage regulator in card stable */
1188 msleep(50);
1189
1190 /* Toggle SD clock again */
1191 err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
1192 if (err < 0)
1193 return err;
1194
1195 /* Wait for a period of time so that the card can drive
1196 * SD_DAT[3:0] to high at 1.8V
1197 */
1198 msleep(20);
1199
1200 /* SD_CMD, SD_DAT[3:0] should be pulled high by host */
1201 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1202 if (err < 0)
1203 return err;
1204
1205 mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1206 SD_DAT1_STATUS | SD_DAT0_STATUS;
1207 val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1208 SD_DAT1_STATUS | SD_DAT0_STATUS;
1209 if ((stat & mask) != val) {
1210 dev_dbg(sdmmc_dev(host),
1211 "%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
1212 rtsx_pci_write_register(pcr, SD_BUS_STAT,
1213 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1214 rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
1215 return -EINVAL;
1216 }
1217
1218 return 0;
1219}
1220
1221static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1222{
1223 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1224 struct rtsx_pcr *pcr = host->pcr;
1225 int err = 0;
1226 u8 voltage;
1227
1228 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1229 __func__, ios->signal_voltage);
1230
1231 if (host->eject)
1232 return -ENOMEDIUM;
1233
1234 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1235 if (err)
1236 return err;
1237
1238 mutex_lock(&pcr->pcr_mutex);
1239
1240 rtsx_pci_start_run(pcr);
1241
1242 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
1243 voltage = OUTPUT_3V3;
1244 else
1245 voltage = OUTPUT_1V8;
1246
1247 if (voltage == OUTPUT_1V8) {
1248 err = sd_wait_voltage_stable_1(host);
1249 if (err < 0)
1250 goto out;
1251 }
1252
1253 err = rtsx_pci_switch_output_voltage(pcr, voltage);
1254 if (err < 0)
1255 goto out;
1256
1257 if (voltage == OUTPUT_1V8) {
1258 err = sd_wait_voltage_stable_2(host);
1259 if (err < 0)
1260 goto out;
1261 }
1262
1263out:
1264 /* Stop toggle SD clock in idle */
1265 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1266 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1267
1268 mutex_unlock(&pcr->pcr_mutex);
1269
1270 return err;
1271}
1272
1273static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1274{
1275 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1276 struct rtsx_pcr *pcr = host->pcr;
1277 int err = 0;
1278
1279 if (host->eject)
1280 return -ENOMEDIUM;
1281
1282 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1283 if (err)
1284 return err;
1285
1286 mutex_lock(&pcr->pcr_mutex);
1287
1288 rtsx_pci_start_run(pcr);
1289
1290 /* Set initial TX phase */
1291 switch (mmc->ios.timing) {
1292 case MMC_TIMING_UHS_SDR104:
1293 err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
1294 break;
1295
1296 case MMC_TIMING_UHS_SDR50:
1297 err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
1298 break;
1299
1300 case MMC_TIMING_UHS_DDR50:
1301 err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
1302 break;
1303
1304 default:
1305 err = 0;
1306 }
1307
1308 if (err)
1309 goto out;
1310
1311 /* Tuning RX phase */
1312 if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
1313 (mmc->ios.timing == MMC_TIMING_UHS_SDR50))
1314 err = sd_tuning_rx(host, opcode);
1315 else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
1316 err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
1317
1318out:
1319 mutex_unlock(&pcr->pcr_mutex);
1320
1321 return err;
1322}
1323
1324static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
1325 .pre_req = sdmmc_pre_req,
1326 .post_req = sdmmc_post_req,
1327 .request = sdmmc_request,
1328 .set_ios = sdmmc_set_ios,
1329 .get_ro = sdmmc_get_ro,
1330 .get_cd = sdmmc_get_cd,
1331 .start_signal_voltage_switch = sdmmc_switch_voltage,
1332 .execute_tuning = sdmmc_execute_tuning,
1333};
1334
1335static void init_extra_caps(struct realtek_pci_sdmmc *host)
1336{
1337 struct mmc_host *mmc = host->mmc;
1338 struct rtsx_pcr *pcr = host->pcr;
1339
1340 dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
1341
1342 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
1343 mmc->caps |= MMC_CAP_UHS_SDR50;
1344 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
1345 mmc->caps |= MMC_CAP_UHS_SDR104;
1346 if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
1347 mmc->caps |= MMC_CAP_UHS_DDR50;
1348 if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
1349 mmc->caps |= MMC_CAP_1_8V_DDR;
1350 if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
1351 mmc->caps |= MMC_CAP_8_BIT_DATA;
1352}
1353
1354static void realtek_init_host(struct realtek_pci_sdmmc *host)
1355{
1356 struct mmc_host *mmc = host->mmc;
1357
1358 mmc->f_min = 250000;
1359 mmc->f_max = 208000000;
1360 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1361 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1362 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1363 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
1364 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
1365 mmc->max_current_330 = 400;
1366 mmc->max_current_180 = 800;
1367 mmc->ops = &realtek_pci_sdmmc_ops;
1368
1369 init_extra_caps(host);
1370
1371 mmc->max_segs = 256;
1372 mmc->max_seg_size = 65536;
1373 mmc->max_blk_size = 512;
1374 mmc->max_blk_count = 65535;
1375 mmc->max_req_size = 524288;
1376}
1377
1378static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
1379{
1380 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1381
1382 host->cookie = -1;
1383 mmc_detect_change(host->mmc, 0);
1384}
1385
1386static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
1387{
1388 struct mmc_host *mmc;
1389 struct realtek_pci_sdmmc *host;
1390 struct rtsx_pcr *pcr;
1391 struct pcr_handle *handle = pdev->dev.platform_data;
1392
1393 if (!handle)
1394 return -ENXIO;
1395
1396 pcr = handle->pcr;
1397 if (!pcr)
1398 return -ENXIO;
1399
1400 dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
1401
1402 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1403 if (!mmc)
1404 return -ENOMEM;
1405
1406 host = mmc_priv(mmc);
1407 host->workq = create_singlethread_workqueue(SDMMC_WORKQ_NAME);
1408 if (!host->workq) {
1409 mmc_free_host(mmc);
1410 return -ENOMEM;
1411 }
1412 host->pcr = pcr;
1413 host->mmc = mmc;
1414 host->pdev = pdev;
1415 host->cookie = -1;
1416 host->power_state = SDMMC_POWER_OFF;
1417 INIT_WORK(&host->work, sd_request);
1418 platform_set_drvdata(pdev, host);
1419 pcr->slots[RTSX_SD_CARD].p_dev = pdev;
1420 pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
1421
1422 mutex_init(&host->host_mutex);
1423
1424 realtek_init_host(host);
1425
1426 mmc_add_host(mmc);
1427
1428 return 0;
1429}
1430
1431static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
1432{
1433 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1434 struct rtsx_pcr *pcr;
1435 struct mmc_host *mmc;
1436
1437 if (!host)
1438 return 0;
1439
1440 pcr = host->pcr;
1441 pcr->slots[RTSX_SD_CARD].p_dev = NULL;
1442 pcr->slots[RTSX_SD_CARD].card_event = NULL;
1443 mmc = host->mmc;
1444
1445 cancel_work_sync(&host->work);
1446
1447 mutex_lock(&host->host_mutex);
1448 if (host->mrq) {
1449 dev_dbg(&(pdev->dev),
1450 "%s: Controller removed during transfer\n",
1451 mmc_hostname(mmc));
1452
1453 rtsx_pci_complete_unfinished_transfer(pcr);
1454
1455 host->mrq->cmd->error = -ENOMEDIUM;
1456 if (host->mrq->stop)
1457 host->mrq->stop->error = -ENOMEDIUM;
1458 mmc_request_done(mmc, host->mrq);
1459 }
1460 mutex_unlock(&host->host_mutex);
1461
1462 mmc_remove_host(mmc);
1463 host->eject = true;
1464
1465 flush_workqueue(host->workq);
1466 destroy_workqueue(host->workq);
1467 host->workq = NULL;
1468
1469 mmc_free_host(mmc);
1470
1471 dev_dbg(&(pdev->dev),
1472 ": Realtek PCI-E SDMMC controller has been removed\n");
1473
1474 return 0;
1475}
1476
1477static const struct platform_device_id rtsx_pci_sdmmc_ids[] = {
1478 {
1479 .name = DRV_NAME_RTSX_PCI_SDMMC,
1480 }, {
1481 /* sentinel */
1482 }
1483};
1484MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
1485
1486static struct platform_driver rtsx_pci_sdmmc_driver = {
1487 .probe = rtsx_pci_sdmmc_drv_probe,
1488 .remove = rtsx_pci_sdmmc_drv_remove,
1489 .id_table = rtsx_pci_sdmmc_ids,
1490 .driver = {
1491 .name = DRV_NAME_RTSX_PCI_SDMMC,
1492 },
1493};
1494module_platform_driver(rtsx_pci_sdmmc_driver);
1495
1496MODULE_LICENSE("GPL");
1497MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1498MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");
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
24struct realtek_pci_sdmmc {
25 struct platform_device *pdev;
26 struct rtsx_pcr *pcr;
27 struct mmc_host *mmc;
28 struct mmc_request *mrq;
29#define SDMMC_WORKQ_NAME "rtsx_pci_sdmmc_workq"
30
31 struct work_struct work;
32 struct mutex host_mutex;
33
34 u8 ssc_depth;
35 unsigned int clock;
36 bool vpclk;
37 bool double_clk;
38 bool eject;
39 bool initial_mode;
40 int power_state;
41#define SDMMC_POWER_ON 1
42#define SDMMC_POWER_OFF 0
43
44 int sg_count;
45 s32 cookie;
46 int cookie_sg_count;
47 bool using_cookie;
48};
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 int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
543{
544 struct mmc_data *data = mrq->data;
545
546 if (host->sg_count < 0) {
547 data->error = host->sg_count;
548 dev_dbg(sdmmc_dev(host), "%s: sg_count = %d is invalid\n",
549 __func__, host->sg_count);
550 return data->error;
551 }
552
553 if (data->flags & MMC_DATA_READ)
554 return sd_read_long_data(host, mrq);
555
556 return sd_write_long_data(host, mrq);
557}
558
559static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
560{
561 rtsx_pci_write_register(host->pcr, SD_CFG1,
562 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
563}
564
565static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
566{
567 rtsx_pci_write_register(host->pcr, SD_CFG1,
568 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
569}
570
571static void sd_normal_rw(struct realtek_pci_sdmmc *host,
572 struct mmc_request *mrq)
573{
574 struct mmc_command *cmd = mrq->cmd;
575 struct mmc_data *data = mrq->data;
576 u8 *buf;
577
578 buf = kzalloc(data->blksz, GFP_NOIO);
579 if (!buf) {
580 cmd->error = -ENOMEM;
581 return;
582 }
583
584 if (data->flags & MMC_DATA_READ) {
585 if (host->initial_mode)
586 sd_disable_initial_mode(host);
587
588 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
589 data->blksz, 200);
590
591 if (host->initial_mode)
592 sd_enable_initial_mode(host);
593
594 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
595 } else {
596 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
597
598 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
599 data->blksz, 200);
600 }
601
602 kfree(buf);
603}
604
605static int sd_change_phase(struct realtek_pci_sdmmc *host,
606 u8 sample_point, bool rx)
607{
608 struct rtsx_pcr *pcr = host->pcr;
609 u16 SD_VP_CTL = 0;
610 dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
611 __func__, rx ? "RX" : "TX", sample_point);
612
613 rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
614 if (rx) {
615 SD_VP_CTL = SD_VPRX_CTL;
616 rtsx_pci_write_register(pcr, SD_VPRX_CTL,
617 PHASE_SELECT_MASK, sample_point);
618 } else {
619 SD_VP_CTL = SD_VPTX_CTL;
620 rtsx_pci_write_register(pcr, SD_VPTX_CTL,
621 PHASE_SELECT_MASK, sample_point);
622 }
623 rtsx_pci_write_register(pcr, SD_VP_CTL, PHASE_NOT_RESET, 0);
624 rtsx_pci_write_register(pcr, SD_VP_CTL, PHASE_NOT_RESET,
625 PHASE_NOT_RESET);
626 rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, 0);
627 rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
628
629 return 0;
630}
631
632static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
633{
634 bit %= RTSX_PHASE_MAX;
635 return phase_map & (1 << bit);
636}
637
638static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
639{
640 int i;
641
642 for (i = 0; i < RTSX_PHASE_MAX; i++) {
643 if (test_phase_bit(phase_map, start_bit + i) == 0)
644 return i;
645 }
646 return RTSX_PHASE_MAX;
647}
648
649static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
650{
651 int start = 0, len = 0;
652 int start_final = 0, len_final = 0;
653 u8 final_phase = 0xFF;
654
655 if (phase_map == 0) {
656 dev_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
657 return final_phase;
658 }
659
660 while (start < RTSX_PHASE_MAX) {
661 len = sd_get_phase_len(phase_map, start);
662 if (len_final < len) {
663 start_final = start;
664 len_final = len;
665 }
666 start += len ? len : 1;
667 }
668
669 final_phase = (start_final + len_final / 2) % RTSX_PHASE_MAX;
670 dev_dbg(sdmmc_dev(host), "phase: [map:%x] [maxlen:%d] [final:%d]\n",
671 phase_map, len_final, final_phase);
672
673 return final_phase;
674}
675
676static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
677{
678 int i;
679 u8 val = 0;
680
681 for (i = 0; i < 100; i++) {
682 rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
683 if (val & SD_DATA_IDLE)
684 return;
685
686 udelay(100);
687 }
688}
689
690static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
691 u8 opcode, u8 sample_point)
692{
693 int err;
694 struct mmc_command cmd = {};
695 struct rtsx_pcr *pcr = host->pcr;
696
697 sd_change_phase(host, sample_point, true);
698
699 rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN,
700 SD_RSP_80CLK_TIMEOUT_EN);
701
702 cmd.opcode = opcode;
703 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
704 if (err < 0) {
705 /* Wait till SD DATA IDLE */
706 sd_wait_data_idle(host);
707 sd_clear_error(host);
708 rtsx_pci_write_register(pcr, SD_CFG3,
709 SD_RSP_80CLK_TIMEOUT_EN, 0);
710 return err;
711 }
712
713 rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN, 0);
714 return 0;
715}
716
717static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
718 u8 opcode, u32 *phase_map)
719{
720 int err, i;
721 u32 raw_phase_map = 0;
722
723 for (i = 0; i < RTSX_PHASE_MAX; i++) {
724 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
725 if (err == 0)
726 raw_phase_map |= 1 << i;
727 }
728
729 if (phase_map)
730 *phase_map = raw_phase_map;
731
732 return 0;
733}
734
735static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
736{
737 int err, i;
738 u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
739 u8 final_phase;
740
741 for (i = 0; i < RX_TUNING_CNT; i++) {
742 err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
743 if (err < 0)
744 return err;
745
746 if (raw_phase_map[i] == 0)
747 break;
748 }
749
750 phase_map = 0xFFFFFFFF;
751 for (i = 0; i < RX_TUNING_CNT; i++) {
752 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
753 i, raw_phase_map[i]);
754 phase_map &= raw_phase_map[i];
755 }
756 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\n", phase_map);
757
758 if (phase_map) {
759 final_phase = sd_search_final_phase(host, phase_map);
760 if (final_phase == 0xFF)
761 return -EINVAL;
762
763 err = sd_change_phase(host, final_phase, true);
764 if (err < 0)
765 return err;
766 } else {
767 return -EINVAL;
768 }
769
770 return 0;
771}
772
773static inline int sdio_extblock_cmd(struct mmc_command *cmd,
774 struct mmc_data *data)
775{
776 return (cmd->opcode == SD_IO_RW_EXTENDED) && (data->blksz == 512);
777}
778
779static inline int sd_rw_cmd(struct mmc_command *cmd)
780{
781 return mmc_op_multi(cmd->opcode) ||
782 (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
783 (cmd->opcode == MMC_WRITE_BLOCK);
784}
785
786static void sd_request(struct work_struct *work)
787{
788 struct realtek_pci_sdmmc *host = container_of(work,
789 struct realtek_pci_sdmmc, work);
790 struct rtsx_pcr *pcr = host->pcr;
791
792 struct mmc_host *mmc = host->mmc;
793 struct mmc_request *mrq = host->mrq;
794 struct mmc_command *cmd = mrq->cmd;
795 struct mmc_data *data = mrq->data;
796
797 unsigned int data_size = 0;
798 int err;
799
800 if (host->eject || !sd_get_cd_int(host)) {
801 cmd->error = -ENOMEDIUM;
802 goto finish;
803 }
804
805 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
806 if (err) {
807 cmd->error = err;
808 goto finish;
809 }
810
811 mutex_lock(&pcr->pcr_mutex);
812
813 rtsx_pci_start_run(pcr);
814
815 rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
816 host->initial_mode, host->double_clk, host->vpclk);
817 rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
818 rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
819 CARD_SHARE_MASK, CARD_SHARE_48_SD);
820
821 mutex_lock(&host->host_mutex);
822 host->mrq = mrq;
823 mutex_unlock(&host->host_mutex);
824
825 if (mrq->data)
826 data_size = data->blocks * data->blksz;
827
828 if (!data_size) {
829 sd_send_cmd_get_rsp(host, cmd);
830 } else if (sd_rw_cmd(cmd) || sdio_extblock_cmd(cmd, data)) {
831 cmd->error = sd_rw_multi(host, mrq);
832 if (!host->using_cookie)
833 sdmmc_post_req(host->mmc, host->mrq, 0);
834
835 if (mmc_op_multi(cmd->opcode) && mrq->stop)
836 sd_send_cmd_get_rsp(host, mrq->stop);
837 } else {
838 sd_normal_rw(host, mrq);
839 }
840
841 if (mrq->data) {
842 if (cmd->error || data->error)
843 data->bytes_xfered = 0;
844 else
845 data->bytes_xfered = data->blocks * data->blksz;
846 }
847
848 mutex_unlock(&pcr->pcr_mutex);
849
850finish:
851 if (cmd->error) {
852 dev_dbg(sdmmc_dev(host), "CMD %d 0x%08x error(%d)\n",
853 cmd->opcode, cmd->arg, cmd->error);
854 }
855
856 mutex_lock(&host->host_mutex);
857 host->mrq = NULL;
858 mutex_unlock(&host->host_mutex);
859
860 mmc_request_done(mmc, mrq);
861}
862
863static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
864{
865 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
866 struct mmc_data *data = mrq->data;
867
868 mutex_lock(&host->host_mutex);
869 host->mrq = mrq;
870 mutex_unlock(&host->host_mutex);
871
872 if (sd_rw_cmd(mrq->cmd) || sdio_extblock_cmd(mrq->cmd, data))
873 host->using_cookie = sd_pre_dma_transfer(host, data, false);
874
875 schedule_work(&host->work);
876}
877
878static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
879 unsigned char bus_width)
880{
881 int err = 0;
882 u8 width[] = {
883 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
884 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
885 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
886 };
887
888 if (bus_width <= MMC_BUS_WIDTH_8)
889 err = rtsx_pci_write_register(host->pcr, SD_CFG1,
890 0x03, width[bus_width]);
891
892 return err;
893}
894
895static int sd_power_on(struct realtek_pci_sdmmc *host)
896{
897 struct rtsx_pcr *pcr = host->pcr;
898 int err;
899
900 if (host->power_state == SDMMC_POWER_ON)
901 return 0;
902
903 rtsx_pci_init_cmd(pcr);
904 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
905 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
906 CARD_SHARE_MASK, CARD_SHARE_48_SD);
907 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
908 SD_CLK_EN, SD_CLK_EN);
909 err = rtsx_pci_send_cmd(pcr, 100);
910 if (err < 0)
911 return err;
912
913 err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
914 if (err < 0)
915 return err;
916
917 err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
918 if (err < 0)
919 return err;
920
921 err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
922 if (err < 0)
923 return err;
924
925 host->power_state = SDMMC_POWER_ON;
926 return 0;
927}
928
929static int sd_power_off(struct realtek_pci_sdmmc *host)
930{
931 struct rtsx_pcr *pcr = host->pcr;
932 int err;
933
934 host->power_state = SDMMC_POWER_OFF;
935
936 rtsx_pci_init_cmd(pcr);
937
938 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
939 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
940
941 err = rtsx_pci_send_cmd(pcr, 100);
942 if (err < 0)
943 return err;
944
945 err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
946 if (err < 0)
947 return err;
948
949 return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
950}
951
952static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
953 unsigned char power_mode)
954{
955 int err;
956
957 if (power_mode == MMC_POWER_OFF)
958 err = sd_power_off(host);
959 else
960 err = sd_power_on(host);
961
962 return err;
963}
964
965static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
966{
967 struct rtsx_pcr *pcr = host->pcr;
968 int err = 0;
969
970 rtsx_pci_init_cmd(pcr);
971
972 switch (timing) {
973 case MMC_TIMING_UHS_SDR104:
974 case MMC_TIMING_UHS_SDR50:
975 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
976 0x0C | SD_ASYNC_FIFO_NOT_RST,
977 SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
978 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
979 CLK_LOW_FREQ, CLK_LOW_FREQ);
980 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
981 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
982 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
983 break;
984
985 case MMC_TIMING_MMC_DDR52:
986 case MMC_TIMING_UHS_DDR50:
987 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
988 0x0C | SD_ASYNC_FIFO_NOT_RST,
989 SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
990 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
991 CLK_LOW_FREQ, CLK_LOW_FREQ);
992 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
993 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
994 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
995 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
996 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
997 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
998 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
999 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1000 break;
1001
1002 case MMC_TIMING_MMC_HS:
1003 case MMC_TIMING_SD_HS:
1004 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
1005 0x0C, SD_20_MODE);
1006 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1007 CLK_LOW_FREQ, CLK_LOW_FREQ);
1008 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1009 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1010 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1011 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1012 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1013 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1014 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1015 break;
1016
1017 default:
1018 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1019 SD_CFG1, 0x0C, SD_20_MODE);
1020 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
1021 CLK_LOW_FREQ, CLK_LOW_FREQ);
1022 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1023 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1024 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
1025 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
1026 SD_PUSH_POINT_CTL, 0xFF, 0);
1027 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1028 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1029 break;
1030 }
1031
1032 err = rtsx_pci_send_cmd(pcr, 100);
1033
1034 return err;
1035}
1036
1037static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1038{
1039 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1040 struct rtsx_pcr *pcr = host->pcr;
1041
1042 if (host->eject)
1043 return;
1044
1045 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
1046 return;
1047
1048 mutex_lock(&pcr->pcr_mutex);
1049
1050 rtsx_pci_start_run(pcr);
1051
1052 sd_set_bus_width(host, ios->bus_width);
1053 sd_set_power_mode(host, ios->power_mode);
1054 sd_set_timing(host, ios->timing);
1055
1056 host->vpclk = false;
1057 host->double_clk = true;
1058
1059 switch (ios->timing) {
1060 case MMC_TIMING_UHS_SDR104:
1061 case MMC_TIMING_UHS_SDR50:
1062 host->ssc_depth = RTSX_SSC_DEPTH_2M;
1063 host->vpclk = true;
1064 host->double_clk = false;
1065 break;
1066 case MMC_TIMING_MMC_DDR52:
1067 case MMC_TIMING_UHS_DDR50:
1068 case MMC_TIMING_UHS_SDR25:
1069 host->ssc_depth = RTSX_SSC_DEPTH_1M;
1070 break;
1071 default:
1072 host->ssc_depth = RTSX_SSC_DEPTH_500K;
1073 break;
1074 }
1075
1076 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1077
1078 host->clock = ios->clock;
1079 rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
1080 host->initial_mode, host->double_clk, host->vpclk);
1081
1082 mutex_unlock(&pcr->pcr_mutex);
1083}
1084
1085static int sdmmc_get_ro(struct mmc_host *mmc)
1086{
1087 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1088 struct rtsx_pcr *pcr = host->pcr;
1089 int ro = 0;
1090 u32 val;
1091
1092 if (host->eject)
1093 return -ENOMEDIUM;
1094
1095 mutex_lock(&pcr->pcr_mutex);
1096
1097 rtsx_pci_start_run(pcr);
1098
1099 /* Check SD mechanical write-protect switch */
1100 val = rtsx_pci_readl(pcr, RTSX_BIPR);
1101 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1102 if (val & SD_WRITE_PROTECT)
1103 ro = 1;
1104
1105 mutex_unlock(&pcr->pcr_mutex);
1106
1107 return ro;
1108}
1109
1110static int sdmmc_get_cd(struct mmc_host *mmc)
1111{
1112 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1113 struct rtsx_pcr *pcr = host->pcr;
1114 int cd = 0;
1115 u32 val;
1116
1117 if (host->eject)
1118 return cd;
1119
1120 mutex_lock(&pcr->pcr_mutex);
1121
1122 rtsx_pci_start_run(pcr);
1123
1124 /* Check SD card detect */
1125 val = rtsx_pci_card_exist(pcr);
1126 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
1127 if (val & SD_EXIST)
1128 cd = 1;
1129
1130 mutex_unlock(&pcr->pcr_mutex);
1131
1132 return cd;
1133}
1134
1135static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
1136{
1137 struct rtsx_pcr *pcr = host->pcr;
1138 int err;
1139 u8 stat;
1140
1141 /* Reference to Signal Voltage Switch Sequence in SD spec.
1142 * Wait for a period of time so that the card can drive SD_CMD and
1143 * SD_DAT[3:0] to low after sending back CMD11 response.
1144 */
1145 mdelay(1);
1146
1147 /* SD_CMD, SD_DAT[3:0] should be driven to low by card;
1148 * If either one of SD_CMD,SD_DAT[3:0] is not low,
1149 * abort the voltage switch sequence;
1150 */
1151 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1152 if (err < 0)
1153 return err;
1154
1155 if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1156 SD_DAT1_STATUS | SD_DAT0_STATUS))
1157 return -EINVAL;
1158
1159 /* Stop toggle SD clock */
1160 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1161 0xFF, SD_CLK_FORCE_STOP);
1162 if (err < 0)
1163 return err;
1164
1165 return 0;
1166}
1167
1168static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
1169{
1170 struct rtsx_pcr *pcr = host->pcr;
1171 int err;
1172 u8 stat, mask, val;
1173
1174 /* Wait 1.8V output of voltage regulator in card stable */
1175 msleep(50);
1176
1177 /* Toggle SD clock again */
1178 err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
1179 if (err < 0)
1180 return err;
1181
1182 /* Wait for a period of time so that the card can drive
1183 * SD_DAT[3:0] to high at 1.8V
1184 */
1185 msleep(20);
1186
1187 /* SD_CMD, SD_DAT[3:0] should be pulled high by host */
1188 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1189 if (err < 0)
1190 return err;
1191
1192 mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1193 SD_DAT1_STATUS | SD_DAT0_STATUS;
1194 val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1195 SD_DAT1_STATUS | SD_DAT0_STATUS;
1196 if ((stat & mask) != val) {
1197 dev_dbg(sdmmc_dev(host),
1198 "%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
1199 rtsx_pci_write_register(pcr, SD_BUS_STAT,
1200 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1201 rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
1202 return -EINVAL;
1203 }
1204
1205 return 0;
1206}
1207
1208static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1209{
1210 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1211 struct rtsx_pcr *pcr = host->pcr;
1212 int err = 0;
1213 u8 voltage;
1214
1215 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1216 __func__, ios->signal_voltage);
1217
1218 if (host->eject)
1219 return -ENOMEDIUM;
1220
1221 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1222 if (err)
1223 return err;
1224
1225 mutex_lock(&pcr->pcr_mutex);
1226
1227 rtsx_pci_start_run(pcr);
1228
1229 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
1230 voltage = OUTPUT_3V3;
1231 else
1232 voltage = OUTPUT_1V8;
1233
1234 if (voltage == OUTPUT_1V8) {
1235 err = sd_wait_voltage_stable_1(host);
1236 if (err < 0)
1237 goto out;
1238 }
1239
1240 err = rtsx_pci_switch_output_voltage(pcr, voltage);
1241 if (err < 0)
1242 goto out;
1243
1244 if (voltage == OUTPUT_1V8) {
1245 err = sd_wait_voltage_stable_2(host);
1246 if (err < 0)
1247 goto out;
1248 }
1249
1250out:
1251 /* Stop toggle SD clock in idle */
1252 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1253 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1254
1255 mutex_unlock(&pcr->pcr_mutex);
1256
1257 return err;
1258}
1259
1260static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1261{
1262 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1263 struct rtsx_pcr *pcr = host->pcr;
1264 int err = 0;
1265
1266 if (host->eject)
1267 return -ENOMEDIUM;
1268
1269 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1270 if (err)
1271 return err;
1272
1273 mutex_lock(&pcr->pcr_mutex);
1274
1275 rtsx_pci_start_run(pcr);
1276
1277 /* Set initial TX phase */
1278 switch (mmc->ios.timing) {
1279 case MMC_TIMING_UHS_SDR104:
1280 err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
1281 break;
1282
1283 case MMC_TIMING_UHS_SDR50:
1284 err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
1285 break;
1286
1287 case MMC_TIMING_UHS_DDR50:
1288 err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
1289 break;
1290
1291 default:
1292 err = 0;
1293 }
1294
1295 if (err)
1296 goto out;
1297
1298 /* Tuning RX phase */
1299 if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
1300 (mmc->ios.timing == MMC_TIMING_UHS_SDR50))
1301 err = sd_tuning_rx(host, opcode);
1302 else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
1303 err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
1304
1305out:
1306 mutex_unlock(&pcr->pcr_mutex);
1307
1308 return err;
1309}
1310
1311static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
1312 .pre_req = sdmmc_pre_req,
1313 .post_req = sdmmc_post_req,
1314 .request = sdmmc_request,
1315 .set_ios = sdmmc_set_ios,
1316 .get_ro = sdmmc_get_ro,
1317 .get_cd = sdmmc_get_cd,
1318 .start_signal_voltage_switch = sdmmc_switch_voltage,
1319 .execute_tuning = sdmmc_execute_tuning,
1320};
1321
1322static void init_extra_caps(struct realtek_pci_sdmmc *host)
1323{
1324 struct mmc_host *mmc = host->mmc;
1325 struct rtsx_pcr *pcr = host->pcr;
1326
1327 dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
1328
1329 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
1330 mmc->caps |= MMC_CAP_UHS_SDR50;
1331 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
1332 mmc->caps |= MMC_CAP_UHS_SDR104;
1333 if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
1334 mmc->caps |= MMC_CAP_UHS_DDR50;
1335 if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
1336 mmc->caps |= MMC_CAP_1_8V_DDR;
1337 if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
1338 mmc->caps |= MMC_CAP_8_BIT_DATA;
1339 if (pcr->extra_caps & EXTRA_CAPS_NO_MMC)
1340 mmc->caps2 |= MMC_CAP2_NO_MMC;
1341}
1342
1343static void realtek_init_host(struct realtek_pci_sdmmc *host)
1344{
1345 struct mmc_host *mmc = host->mmc;
1346
1347 mmc->f_min = 250000;
1348 mmc->f_max = 208000000;
1349 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1350 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1351 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1352 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
1353 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
1354 mmc->max_current_330 = 400;
1355 mmc->max_current_180 = 800;
1356 mmc->ops = &realtek_pci_sdmmc_ops;
1357
1358 init_extra_caps(host);
1359
1360 mmc->max_segs = 256;
1361 mmc->max_seg_size = 65536;
1362 mmc->max_blk_size = 512;
1363 mmc->max_blk_count = 65535;
1364 mmc->max_req_size = 524288;
1365}
1366
1367static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
1368{
1369 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1370
1371 host->cookie = -1;
1372 mmc_detect_change(host->mmc, 0);
1373}
1374
1375static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
1376{
1377 struct mmc_host *mmc;
1378 struct realtek_pci_sdmmc *host;
1379 struct rtsx_pcr *pcr;
1380 struct pcr_handle *handle = pdev->dev.platform_data;
1381
1382 if (!handle)
1383 return -ENXIO;
1384
1385 pcr = handle->pcr;
1386 if (!pcr)
1387 return -ENXIO;
1388
1389 dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
1390
1391 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1392 if (!mmc)
1393 return -ENOMEM;
1394
1395 host = mmc_priv(mmc);
1396 host->pcr = pcr;
1397 host->mmc = mmc;
1398 host->pdev = pdev;
1399 host->cookie = -1;
1400 host->power_state = SDMMC_POWER_OFF;
1401 INIT_WORK(&host->work, sd_request);
1402 platform_set_drvdata(pdev, host);
1403 pcr->slots[RTSX_SD_CARD].p_dev = pdev;
1404 pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
1405
1406 mutex_init(&host->host_mutex);
1407
1408 realtek_init_host(host);
1409
1410 mmc_add_host(mmc);
1411
1412 return 0;
1413}
1414
1415static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
1416{
1417 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1418 struct rtsx_pcr *pcr;
1419 struct mmc_host *mmc;
1420
1421 if (!host)
1422 return 0;
1423
1424 pcr = host->pcr;
1425 pcr->slots[RTSX_SD_CARD].p_dev = NULL;
1426 pcr->slots[RTSX_SD_CARD].card_event = NULL;
1427 mmc = host->mmc;
1428
1429 cancel_work_sync(&host->work);
1430
1431 mutex_lock(&host->host_mutex);
1432 if (host->mrq) {
1433 dev_dbg(&(pdev->dev),
1434 "%s: Controller removed during transfer\n",
1435 mmc_hostname(mmc));
1436
1437 rtsx_pci_complete_unfinished_transfer(pcr);
1438
1439 host->mrq->cmd->error = -ENOMEDIUM;
1440 if (host->mrq->stop)
1441 host->mrq->stop->error = -ENOMEDIUM;
1442 mmc_request_done(mmc, host->mrq);
1443 }
1444 mutex_unlock(&host->host_mutex);
1445
1446 mmc_remove_host(mmc);
1447 host->eject = true;
1448
1449 flush_work(&host->work);
1450
1451 mmc_free_host(mmc);
1452
1453 dev_dbg(&(pdev->dev),
1454 ": Realtek PCI-E SDMMC controller has been removed\n");
1455
1456 return 0;
1457}
1458
1459static const struct platform_device_id rtsx_pci_sdmmc_ids[] = {
1460 {
1461 .name = DRV_NAME_RTSX_PCI_SDMMC,
1462 }, {
1463 /* sentinel */
1464 }
1465};
1466MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
1467
1468static struct platform_driver rtsx_pci_sdmmc_driver = {
1469 .probe = rtsx_pci_sdmmc_drv_probe,
1470 .remove = rtsx_pci_sdmmc_drv_remove,
1471 .id_table = rtsx_pci_sdmmc_ids,
1472 .driver = {
1473 .name = DRV_NAME_RTSX_PCI_SDMMC,
1474 },
1475};
1476module_platform_driver(rtsx_pci_sdmmc_driver);
1477
1478MODULE_LICENSE("GPL");
1479MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1480MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");