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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/* 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/mmc/host.h>
28#include <linux/mmc/mmc.h>
29#include <linux/mmc/sd.h>
30#include <linux/mmc/card.h>
31#include <linux/mfd/rtsx_pci.h>
32#include <asm/unaligned.h>
33
34struct realtek_pci_sdmmc {
35 struct platform_device *pdev;
36 struct rtsx_pcr *pcr;
37 struct mmc_host *mmc;
38 struct mmc_request *mrq;
39
40 struct mutex host_mutex;
41
42 u8 ssc_depth;
43 unsigned int clock;
44 bool vpclk;
45 bool double_clk;
46 bool eject;
47 bool initial_mode;
48 int power_state;
49#define SDMMC_POWER_ON 1
50#define SDMMC_POWER_OFF 0
51};
52
53static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
54{
55 return &(host->pdev->dev);
56}
57
58static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
59{
60 rtsx_pci_write_register(host->pcr, CARD_STOP,
61 SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
62}
63
64#ifdef DEBUG
65static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
66{
67 struct rtsx_pcr *pcr = host->pcr;
68 u16 i;
69 u8 *ptr;
70
71 /* Print SD host internal registers */
72 rtsx_pci_init_cmd(pcr);
73 for (i = 0xFDA0; i <= 0xFDAE; i++)
74 rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
75 for (i = 0xFD52; i <= 0xFD69; i++)
76 rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
77 rtsx_pci_send_cmd(pcr, 100);
78
79 ptr = rtsx_pci_get_cmd_data(pcr);
80 for (i = 0xFDA0; i <= 0xFDAE; i++)
81 dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
82 for (i = 0xFD52; i <= 0xFD69; i++)
83 dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
84}
85#else
86#define sd_print_debug_regs(host)
87#endif /* DEBUG */
88
89static int sd_read_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
90 u8 *buf, int buf_len, int timeout)
91{
92 struct rtsx_pcr *pcr = host->pcr;
93 int err, i;
94 u8 trans_mode;
95
96 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__, cmd[0] - 0x40);
97
98 if (!buf)
99 buf_len = 0;
100
101 if ((cmd[0] & 0x3F) == MMC_SEND_TUNING_BLOCK)
102 trans_mode = SD_TM_AUTO_TUNING;
103 else
104 trans_mode = SD_TM_NORMAL_READ;
105
106 rtsx_pci_init_cmd(pcr);
107
108 for (i = 0; i < 5; i++)
109 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0 + i, 0xFF, cmd[i]);
110
111 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
112 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H,
113 0xFF, (u8)(byte_cnt >> 8));
114 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
115 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
116
117 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
118 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
119 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
120 if (trans_mode != SD_TM_AUTO_TUNING)
121 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
122 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
123
124 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
125 0xFF, trans_mode | SD_TRANSFER_START);
126 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
127 SD_TRANSFER_END, SD_TRANSFER_END);
128
129 err = rtsx_pci_send_cmd(pcr, timeout);
130 if (err < 0) {
131 sd_print_debug_regs(host);
132 dev_dbg(sdmmc_dev(host),
133 "rtsx_pci_send_cmd fail (err = %d)\n", err);
134 return err;
135 }
136
137 if (buf && buf_len) {
138 err = rtsx_pci_read_ppbuf(pcr, buf, buf_len);
139 if (err < 0) {
140 dev_dbg(sdmmc_dev(host),
141 "rtsx_pci_read_ppbuf fail (err = %d)\n", err);
142 return err;
143 }
144 }
145
146 return 0;
147}
148
149static int sd_write_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
150 u8 *buf, int buf_len, int timeout)
151{
152 struct rtsx_pcr *pcr = host->pcr;
153 int err, i;
154 u8 trans_mode;
155
156 if (!buf)
157 buf_len = 0;
158
159 if (buf && buf_len) {
160 err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
161 if (err < 0) {
162 dev_dbg(sdmmc_dev(host),
163 "rtsx_pci_write_ppbuf fail (err = %d)\n", err);
164 return err;
165 }
166 }
167
168 trans_mode = cmd ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
169 rtsx_pci_init_cmd(pcr);
170
171 if (cmd) {
172 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d\n", __func__,
173 cmd[0] - 0x40);
174
175 for (i = 0; i < 5; i++)
176 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
177 SD_CMD0 + i, 0xFF, cmd[i]);
178 }
179
180 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
181 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H,
182 0xFF, (u8)(byte_cnt >> 8));
183 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
184 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
185
186 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
187 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
188 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
189
190 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
191 trans_mode | SD_TRANSFER_START);
192 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
193 SD_TRANSFER_END, SD_TRANSFER_END);
194
195 err = rtsx_pci_send_cmd(pcr, timeout);
196 if (err < 0) {
197 sd_print_debug_regs(host);
198 dev_dbg(sdmmc_dev(host),
199 "rtsx_pci_send_cmd fail (err = %d)\n", err);
200 return err;
201 }
202
203 return 0;
204}
205
206static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
207 struct mmc_command *cmd)
208{
209 struct rtsx_pcr *pcr = host->pcr;
210 u8 cmd_idx = (u8)cmd->opcode;
211 u32 arg = cmd->arg;
212 int err = 0;
213 int timeout = 100;
214 int i;
215 u8 *ptr;
216 int stat_idx = 0;
217 u8 rsp_type;
218 int rsp_len = 5;
219 bool clock_toggled = false;
220
221 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
222 __func__, cmd_idx, arg);
223
224 /* Response type:
225 * R0
226 * R1, R5, R6, R7
227 * R1b
228 * R2
229 * R3, R4
230 */
231 switch (mmc_resp_type(cmd)) {
232 case MMC_RSP_NONE:
233 rsp_type = SD_RSP_TYPE_R0;
234 rsp_len = 0;
235 break;
236 case MMC_RSP_R1:
237 rsp_type = SD_RSP_TYPE_R1;
238 break;
239 case MMC_RSP_R1B:
240 rsp_type = SD_RSP_TYPE_R1b;
241 break;
242 case MMC_RSP_R2:
243 rsp_type = SD_RSP_TYPE_R2;
244 rsp_len = 16;
245 break;
246 case MMC_RSP_R3:
247 rsp_type = SD_RSP_TYPE_R3;
248 break;
249 default:
250 dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
251 err = -EINVAL;
252 goto out;
253 }
254
255 if (rsp_type == SD_RSP_TYPE_R1b)
256 timeout = 3000;
257
258 if (cmd->opcode == SD_SWITCH_VOLTAGE) {
259 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
260 0xFF, SD_CLK_TOGGLE_EN);
261 if (err < 0)
262 goto out;
263
264 clock_toggled = true;
265 }
266
267 rtsx_pci_init_cmd(pcr);
268
269 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
270 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
271 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
272 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
273 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
274
275 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
276 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
277 0x01, PINGPONG_BUFFER);
278 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
279 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
280 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
281 SD_TRANSFER_END | SD_STAT_IDLE,
282 SD_TRANSFER_END | SD_STAT_IDLE);
283
284 if (rsp_type == SD_RSP_TYPE_R2) {
285 /* Read data from ping-pong buffer */
286 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
287 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
288 stat_idx = 16;
289 } else if (rsp_type != SD_RSP_TYPE_R0) {
290 /* Read data from SD_CMDx registers */
291 for (i = SD_CMD0; i <= SD_CMD4; i++)
292 rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
293 stat_idx = 5;
294 }
295
296 rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
297
298 err = rtsx_pci_send_cmd(pcr, timeout);
299 if (err < 0) {
300 sd_print_debug_regs(host);
301 sd_clear_error(host);
302 dev_dbg(sdmmc_dev(host),
303 "rtsx_pci_send_cmd error (err = %d)\n", err);
304 goto out;
305 }
306
307 if (rsp_type == SD_RSP_TYPE_R0) {
308 err = 0;
309 goto out;
310 }
311
312 /* Eliminate returned value of CHECK_REG_CMD */
313 ptr = rtsx_pci_get_cmd_data(pcr) + 1;
314
315 /* Check (Start,Transmission) bit of Response */
316 if ((ptr[0] & 0xC0) != 0) {
317 err = -EILSEQ;
318 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
319 goto out;
320 }
321
322 /* Check CRC7 */
323 if (!(rsp_type & SD_NO_CHECK_CRC7)) {
324 if (ptr[stat_idx] & SD_CRC7_ERR) {
325 err = -EILSEQ;
326 dev_dbg(sdmmc_dev(host), "CRC7 error\n");
327 goto out;
328 }
329 }
330
331 if (rsp_type == SD_RSP_TYPE_R2) {
332 for (i = 0; i < 4; i++) {
333 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
334 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
335 i, cmd->resp[i]);
336 }
337 } else {
338 cmd->resp[0] = get_unaligned_be32(ptr + 1);
339 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
340 cmd->resp[0]);
341 }
342
343out:
344 cmd->error = err;
345
346 if (err && clock_toggled)
347 rtsx_pci_write_register(pcr, SD_BUS_STAT,
348 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
349}
350
351static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
352{
353 struct rtsx_pcr *pcr = host->pcr;
354 struct mmc_host *mmc = host->mmc;
355 struct mmc_card *card = mmc->card;
356 struct mmc_data *data = mrq->data;
357 int uhs = mmc_card_uhs(card);
358 int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
359 u8 cfg2, trans_mode;
360 int err;
361 size_t data_len = data->blksz * data->blocks;
362
363 if (read) {
364 cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
365 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
366 trans_mode = SD_TM_AUTO_READ_3;
367 } else {
368 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
369 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
370 trans_mode = SD_TM_AUTO_WRITE_3;
371 }
372
373 if (!uhs)
374 cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
375
376 rtsx_pci_init_cmd(pcr);
377
378 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
379 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
380 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
381 0xFF, (u8)data->blocks);
382 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
383 0xFF, (u8)(data->blocks >> 8));
384
385 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
386 DMA_DONE_INT, DMA_DONE_INT);
387 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
388 0xFF, (u8)(data_len >> 24));
389 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
390 0xFF, (u8)(data_len >> 16));
391 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
392 0xFF, (u8)(data_len >> 8));
393 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
394 if (read) {
395 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
396 0x03 | DMA_PACK_SIZE_MASK,
397 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
398 } else {
399 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
400 0x03 | DMA_PACK_SIZE_MASK,
401 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
402 }
403
404 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
405 0x01, RING_BUFFER);
406
407 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
408 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
409 trans_mode | SD_TRANSFER_START);
410 rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
411 SD_TRANSFER_END, SD_TRANSFER_END);
412
413 rtsx_pci_send_cmd_no_wait(pcr);
414
415 err = rtsx_pci_transfer_data(pcr, data->sg, data->sg_len, read, 10000);
416 if (err < 0) {
417 sd_clear_error(host);
418 return err;
419 }
420
421 return 0;
422}
423
424static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
425{
426 rtsx_pci_write_register(host->pcr, SD_CFG1,
427 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
428}
429
430static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
431{
432 rtsx_pci_write_register(host->pcr, SD_CFG1,
433 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
434}
435
436static void sd_normal_rw(struct realtek_pci_sdmmc *host,
437 struct mmc_request *mrq)
438{
439 struct mmc_command *cmd = mrq->cmd;
440 struct mmc_data *data = mrq->data;
441 u8 _cmd[5], *buf;
442
443 _cmd[0] = 0x40 | (u8)cmd->opcode;
444 put_unaligned_be32(cmd->arg, (u32 *)(&_cmd[1]));
445
446 buf = kzalloc(data->blksz, GFP_NOIO);
447 if (!buf) {
448 cmd->error = -ENOMEM;
449 return;
450 }
451
452 if (data->flags & MMC_DATA_READ) {
453 if (host->initial_mode)
454 sd_disable_initial_mode(host);
455
456 cmd->error = sd_read_data(host, _cmd, (u16)data->blksz, buf,
457 data->blksz, 200);
458
459 if (host->initial_mode)
460 sd_enable_initial_mode(host);
461
462 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
463 } else {
464 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
465
466 cmd->error = sd_write_data(host, _cmd, (u16)data->blksz, buf,
467 data->blksz, 200);
468 }
469
470 kfree(buf);
471}
472
473static int sd_change_phase(struct realtek_pci_sdmmc *host,
474 u8 sample_point, bool rx)
475{
476 struct rtsx_pcr *pcr = host->pcr;
477 int err;
478
479 dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
480 __func__, rx ? "RX" : "TX", sample_point);
481
482 rtsx_pci_init_cmd(pcr);
483
484 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
485 if (rx)
486 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
487 SD_VPRX_CTL, 0x1F, sample_point);
488 else
489 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
490 SD_VPTX_CTL, 0x1F, sample_point);
491 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
492 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
493 PHASE_NOT_RESET, PHASE_NOT_RESET);
494 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, 0);
495 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
496
497 err = rtsx_pci_send_cmd(pcr, 100);
498 if (err < 0)
499 return err;
500
501 return 0;
502}
503
504static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
505{
506 bit %= RTSX_PHASE_MAX;
507 return phase_map & (1 << bit);
508}
509
510static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
511{
512 int i;
513
514 for (i = 0; i < RTSX_PHASE_MAX; i++) {
515 if (test_phase_bit(phase_map, start_bit + i) == 0)
516 return i;
517 }
518 return RTSX_PHASE_MAX;
519}
520
521static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
522{
523 int start = 0, len = 0;
524 int start_final = 0, len_final = 0;
525 u8 final_phase = 0xFF;
526
527 if (phase_map == 0) {
528 dev_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
529 return final_phase;
530 }
531
532 while (start < RTSX_PHASE_MAX) {
533 len = sd_get_phase_len(phase_map, start);
534 if (len_final < len) {
535 start_final = start;
536 len_final = len;
537 }
538 start += len ? len : 1;
539 }
540
541 final_phase = (start_final + len_final / 2) % RTSX_PHASE_MAX;
542 dev_dbg(sdmmc_dev(host), "phase: [map:%x] [maxlen:%d] [final:%d]\n",
543 phase_map, len_final, final_phase);
544
545 return final_phase;
546}
547
548static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
549{
550 int err, i;
551 u8 val = 0;
552
553 for (i = 0; i < 100; i++) {
554 err = rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
555 if (val & SD_DATA_IDLE)
556 return;
557
558 udelay(100);
559 }
560}
561
562static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
563 u8 opcode, u8 sample_point)
564{
565 int err;
566 u8 cmd[5] = {0};
567
568 err = sd_change_phase(host, sample_point, true);
569 if (err < 0)
570 return err;
571
572 cmd[0] = 0x40 | opcode;
573 err = sd_read_data(host, cmd, 0x40, NULL, 0, 100);
574 if (err < 0) {
575 /* Wait till SD DATA IDLE */
576 sd_wait_data_idle(host);
577 sd_clear_error(host);
578 return err;
579 }
580
581 return 0;
582}
583
584static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
585 u8 opcode, u32 *phase_map)
586{
587 int err, i;
588 u32 raw_phase_map = 0;
589
590 for (i = 0; i < RTSX_PHASE_MAX; i++) {
591 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
592 if (err == 0)
593 raw_phase_map |= 1 << i;
594 }
595
596 if (phase_map)
597 *phase_map = raw_phase_map;
598
599 return 0;
600}
601
602static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
603{
604 int err, i;
605 u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
606 u8 final_phase;
607
608 for (i = 0; i < RX_TUNING_CNT; i++) {
609 err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
610 if (err < 0)
611 return err;
612
613 if (raw_phase_map[i] == 0)
614 break;
615 }
616
617 phase_map = 0xFFFFFFFF;
618 for (i = 0; i < RX_TUNING_CNT; i++) {
619 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
620 i, raw_phase_map[i]);
621 phase_map &= raw_phase_map[i];
622 }
623 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\n", phase_map);
624
625 if (phase_map) {
626 final_phase = sd_search_final_phase(host, phase_map);
627 if (final_phase == 0xFF)
628 return -EINVAL;
629
630 err = sd_change_phase(host, final_phase, true);
631 if (err < 0)
632 return err;
633 } else {
634 return -EINVAL;
635 }
636
637 return 0;
638}
639
640static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
641{
642 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
643 struct rtsx_pcr *pcr = host->pcr;
644 struct mmc_command *cmd = mrq->cmd;
645 struct mmc_data *data = mrq->data;
646 unsigned int data_size = 0;
647 int err;
648
649 if (host->eject) {
650 cmd->error = -ENOMEDIUM;
651 goto finish;
652 }
653
654 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
655 if (err) {
656 cmd->error = err;
657 goto finish;
658 }
659
660 mutex_lock(&pcr->pcr_mutex);
661
662 rtsx_pci_start_run(pcr);
663
664 rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
665 host->initial_mode, host->double_clk, host->vpclk);
666 rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
667 rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
668 CARD_SHARE_MASK, CARD_SHARE_48_SD);
669
670 mutex_lock(&host->host_mutex);
671 host->mrq = mrq;
672 mutex_unlock(&host->host_mutex);
673
674 if (mrq->data)
675 data_size = data->blocks * data->blksz;
676
677 if (!data_size || mmc_op_multi(cmd->opcode) ||
678 (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
679 (cmd->opcode == MMC_WRITE_BLOCK)) {
680 sd_send_cmd_get_rsp(host, cmd);
681
682 if (!cmd->error && data_size) {
683 sd_rw_multi(host, mrq);
684
685 if (mmc_op_multi(cmd->opcode) && mrq->stop)
686 sd_send_cmd_get_rsp(host, mrq->stop);
687 }
688 } else {
689 sd_normal_rw(host, mrq);
690 }
691
692 if (mrq->data) {
693 if (cmd->error || data->error)
694 data->bytes_xfered = 0;
695 else
696 data->bytes_xfered = data->blocks * data->blksz;
697 }
698
699 mutex_unlock(&pcr->pcr_mutex);
700
701finish:
702 if (cmd->error)
703 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
704
705 mutex_lock(&host->host_mutex);
706 host->mrq = NULL;
707 mutex_unlock(&host->host_mutex);
708
709 mmc_request_done(mmc, mrq);
710}
711
712static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
713 unsigned char bus_width)
714{
715 int err = 0;
716 u8 width[] = {
717 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
718 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
719 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
720 };
721
722 if (bus_width <= MMC_BUS_WIDTH_8)
723 err = rtsx_pci_write_register(host->pcr, SD_CFG1,
724 0x03, width[bus_width]);
725
726 return err;
727}
728
729static int sd_power_on(struct realtek_pci_sdmmc *host)
730{
731 struct rtsx_pcr *pcr = host->pcr;
732 int err;
733
734 if (host->power_state == SDMMC_POWER_ON)
735 return 0;
736
737 rtsx_pci_init_cmd(pcr);
738 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
739 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
740 CARD_SHARE_MASK, CARD_SHARE_48_SD);
741 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
742 SD_CLK_EN, SD_CLK_EN);
743 err = rtsx_pci_send_cmd(pcr, 100);
744 if (err < 0)
745 return err;
746
747 err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
748 if (err < 0)
749 return err;
750
751 err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
752 if (err < 0)
753 return err;
754
755 err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
756 if (err < 0)
757 return err;
758
759 host->power_state = SDMMC_POWER_ON;
760 return 0;
761}
762
763static int sd_power_off(struct realtek_pci_sdmmc *host)
764{
765 struct rtsx_pcr *pcr = host->pcr;
766 int err;
767
768 host->power_state = SDMMC_POWER_OFF;
769
770 rtsx_pci_init_cmd(pcr);
771
772 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
773 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
774
775 err = rtsx_pci_send_cmd(pcr, 100);
776 if (err < 0)
777 return err;
778
779 err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
780 if (err < 0)
781 return err;
782
783 return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
784}
785
786static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
787 unsigned char power_mode)
788{
789 int err;
790
791 if (power_mode == MMC_POWER_OFF)
792 err = sd_power_off(host);
793 else
794 err = sd_power_on(host);
795
796 return err;
797}
798
799static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
800{
801 struct rtsx_pcr *pcr = host->pcr;
802 int err = 0;
803
804 rtsx_pci_init_cmd(pcr);
805
806 switch (timing) {
807 case MMC_TIMING_UHS_SDR104:
808 case MMC_TIMING_UHS_SDR50:
809 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
810 0x0C | SD_ASYNC_FIFO_NOT_RST,
811 SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
812 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
813 CLK_LOW_FREQ, CLK_LOW_FREQ);
814 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
815 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
816 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
817 break;
818
819 case MMC_TIMING_UHS_DDR50:
820 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
821 0x0C | SD_ASYNC_FIFO_NOT_RST,
822 SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
823 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
824 CLK_LOW_FREQ, CLK_LOW_FREQ);
825 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
826 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
827 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
828 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
829 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
830 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
831 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
832 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
833 break;
834
835 case MMC_TIMING_MMC_HS:
836 case MMC_TIMING_SD_HS:
837 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
838 0x0C, SD_20_MODE);
839 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
840 CLK_LOW_FREQ, CLK_LOW_FREQ);
841 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
842 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
843 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
844 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
845 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
846 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
847 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
848 break;
849
850 default:
851 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
852 SD_CFG1, 0x0C, SD_20_MODE);
853 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
854 CLK_LOW_FREQ, CLK_LOW_FREQ);
855 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
856 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
857 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
858 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
859 SD_PUSH_POINT_CTL, 0xFF, 0);
860 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
861 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
862 break;
863 }
864
865 err = rtsx_pci_send_cmd(pcr, 100);
866
867 return err;
868}
869
870static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
871{
872 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
873 struct rtsx_pcr *pcr = host->pcr;
874
875 if (host->eject)
876 return;
877
878 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
879 return;
880
881 mutex_lock(&pcr->pcr_mutex);
882
883 rtsx_pci_start_run(pcr);
884
885 sd_set_bus_width(host, ios->bus_width);
886 sd_set_power_mode(host, ios->power_mode);
887 sd_set_timing(host, ios->timing);
888
889 host->vpclk = false;
890 host->double_clk = true;
891
892 switch (ios->timing) {
893 case MMC_TIMING_UHS_SDR104:
894 case MMC_TIMING_UHS_SDR50:
895 host->ssc_depth = RTSX_SSC_DEPTH_2M;
896 host->vpclk = true;
897 host->double_clk = false;
898 break;
899 case MMC_TIMING_UHS_DDR50:
900 case MMC_TIMING_UHS_SDR25:
901 host->ssc_depth = RTSX_SSC_DEPTH_1M;
902 break;
903 default:
904 host->ssc_depth = RTSX_SSC_DEPTH_500K;
905 break;
906 }
907
908 host->initial_mode = (ios->clock <= 1000000) ? true : false;
909
910 host->clock = ios->clock;
911 rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
912 host->initial_mode, host->double_clk, host->vpclk);
913
914 mutex_unlock(&pcr->pcr_mutex);
915}
916
917static int sdmmc_get_ro(struct mmc_host *mmc)
918{
919 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
920 struct rtsx_pcr *pcr = host->pcr;
921 int ro = 0;
922 u32 val;
923
924 if (host->eject)
925 return -ENOMEDIUM;
926
927 mutex_lock(&pcr->pcr_mutex);
928
929 rtsx_pci_start_run(pcr);
930
931 /* Check SD mechanical write-protect switch */
932 val = rtsx_pci_readl(pcr, RTSX_BIPR);
933 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
934 if (val & SD_WRITE_PROTECT)
935 ro = 1;
936
937 mutex_unlock(&pcr->pcr_mutex);
938
939 return ro;
940}
941
942static int sdmmc_get_cd(struct mmc_host *mmc)
943{
944 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
945 struct rtsx_pcr *pcr = host->pcr;
946 int cd = 0;
947 u32 val;
948
949 if (host->eject)
950 return -ENOMEDIUM;
951
952 mutex_lock(&pcr->pcr_mutex);
953
954 rtsx_pci_start_run(pcr);
955
956 /* Check SD card detect */
957 val = rtsx_pci_card_exist(pcr);
958 dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
959 if (val & SD_EXIST)
960 cd = 1;
961
962 mutex_unlock(&pcr->pcr_mutex);
963
964 return cd;
965}
966
967static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
968{
969 struct rtsx_pcr *pcr = host->pcr;
970 int err;
971 u8 stat;
972
973 /* Reference to Signal Voltage Switch Sequence in SD spec.
974 * Wait for a period of time so that the card can drive SD_CMD and
975 * SD_DAT[3:0] to low after sending back CMD11 response.
976 */
977 mdelay(1);
978
979 /* SD_CMD, SD_DAT[3:0] should be driven to low by card;
980 * If either one of SD_CMD,SD_DAT[3:0] is not low,
981 * abort the voltage switch sequence;
982 */
983 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
984 if (err < 0)
985 return err;
986
987 if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
988 SD_DAT1_STATUS | SD_DAT0_STATUS))
989 return -EINVAL;
990
991 /* Stop toggle SD clock */
992 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
993 0xFF, SD_CLK_FORCE_STOP);
994 if (err < 0)
995 return err;
996
997 return 0;
998}
999
1000static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
1001{
1002 struct rtsx_pcr *pcr = host->pcr;
1003 int err;
1004 u8 stat, mask, val;
1005
1006 /* Wait 1.8V output of voltage regulator in card stable */
1007 msleep(50);
1008
1009 /* Toggle SD clock again */
1010 err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
1011 if (err < 0)
1012 return err;
1013
1014 /* Wait for a period of time so that the card can drive
1015 * SD_DAT[3:0] to high at 1.8V
1016 */
1017 msleep(20);
1018
1019 /* SD_CMD, SD_DAT[3:0] should be pulled high by host */
1020 err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
1021 if (err < 0)
1022 return err;
1023
1024 mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1025 SD_DAT1_STATUS | SD_DAT0_STATUS;
1026 val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
1027 SD_DAT1_STATUS | SD_DAT0_STATUS;
1028 if ((stat & mask) != val) {
1029 dev_dbg(sdmmc_dev(host),
1030 "%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
1031 rtsx_pci_write_register(pcr, SD_BUS_STAT,
1032 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1033 rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
1034 return -EINVAL;
1035 }
1036
1037 return 0;
1038}
1039
1040static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1041{
1042 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1043 struct rtsx_pcr *pcr = host->pcr;
1044 int err = 0;
1045 u8 voltage;
1046
1047 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1048 __func__, ios->signal_voltage);
1049
1050 if (host->eject)
1051 return -ENOMEDIUM;
1052
1053 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1054 if (err)
1055 return err;
1056
1057 mutex_lock(&pcr->pcr_mutex);
1058
1059 rtsx_pci_start_run(pcr);
1060
1061 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
1062 voltage = OUTPUT_3V3;
1063 else
1064 voltage = OUTPUT_1V8;
1065
1066 if (voltage == OUTPUT_1V8) {
1067 err = sd_wait_voltage_stable_1(host);
1068 if (err < 0)
1069 goto out;
1070 }
1071
1072 err = rtsx_pci_switch_output_voltage(pcr, voltage);
1073 if (err < 0)
1074 goto out;
1075
1076 if (voltage == OUTPUT_1V8) {
1077 err = sd_wait_voltage_stable_2(host);
1078 if (err < 0)
1079 goto out;
1080 }
1081
1082out:
1083 /* Stop toggle SD clock in idle */
1084 err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
1085 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1086
1087 mutex_unlock(&pcr->pcr_mutex);
1088
1089 return err;
1090}
1091
1092static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1093{
1094 struct realtek_pci_sdmmc *host = mmc_priv(mmc);
1095 struct rtsx_pcr *pcr = host->pcr;
1096 int err = 0;
1097
1098 if (host->eject)
1099 return -ENOMEDIUM;
1100
1101 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1102 if (err)
1103 return err;
1104
1105 mutex_lock(&pcr->pcr_mutex);
1106
1107 rtsx_pci_start_run(pcr);
1108
1109 /* Set initial TX phase */
1110 switch (mmc->ios.timing) {
1111 case MMC_TIMING_UHS_SDR104:
1112 err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
1113 break;
1114
1115 case MMC_TIMING_UHS_SDR50:
1116 err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
1117 break;
1118
1119 case MMC_TIMING_UHS_DDR50:
1120 err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
1121 break;
1122
1123 default:
1124 err = 0;
1125 }
1126
1127 if (err)
1128 goto out;
1129
1130 /* Tuning RX phase */
1131 if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
1132 (mmc->ios.timing == MMC_TIMING_UHS_SDR50))
1133 err = sd_tuning_rx(host, opcode);
1134 else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
1135 err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
1136
1137out:
1138 mutex_unlock(&pcr->pcr_mutex);
1139
1140 return err;
1141}
1142
1143static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
1144 .request = sdmmc_request,
1145 .set_ios = sdmmc_set_ios,
1146 .get_ro = sdmmc_get_ro,
1147 .get_cd = sdmmc_get_cd,
1148 .start_signal_voltage_switch = sdmmc_switch_voltage,
1149 .execute_tuning = sdmmc_execute_tuning,
1150};
1151
1152static void init_extra_caps(struct realtek_pci_sdmmc *host)
1153{
1154 struct mmc_host *mmc = host->mmc;
1155 struct rtsx_pcr *pcr = host->pcr;
1156
1157 dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
1158
1159 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
1160 mmc->caps |= MMC_CAP_UHS_SDR50;
1161 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
1162 mmc->caps |= MMC_CAP_UHS_SDR104;
1163 if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
1164 mmc->caps |= MMC_CAP_UHS_DDR50;
1165 if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
1166 mmc->caps |= MMC_CAP_1_8V_DDR;
1167 if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
1168 mmc->caps |= MMC_CAP_8_BIT_DATA;
1169}
1170
1171static void realtek_init_host(struct realtek_pci_sdmmc *host)
1172{
1173 struct mmc_host *mmc = host->mmc;
1174
1175 mmc->f_min = 250000;
1176 mmc->f_max = 208000000;
1177 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1178 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1179 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1180 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
1181 mmc->max_current_330 = 400;
1182 mmc->max_current_180 = 800;
1183 mmc->ops = &realtek_pci_sdmmc_ops;
1184
1185 init_extra_caps(host);
1186
1187 mmc->max_segs = 256;
1188 mmc->max_seg_size = 65536;
1189 mmc->max_blk_size = 512;
1190 mmc->max_blk_count = 65535;
1191 mmc->max_req_size = 524288;
1192}
1193
1194static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
1195{
1196 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1197
1198 mmc_detect_change(host->mmc, 0);
1199}
1200
1201static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
1202{
1203 struct mmc_host *mmc;
1204 struct realtek_pci_sdmmc *host;
1205 struct rtsx_pcr *pcr;
1206 struct pcr_handle *handle = pdev->dev.platform_data;
1207
1208 if (!handle)
1209 return -ENXIO;
1210
1211 pcr = handle->pcr;
1212 if (!pcr)
1213 return -ENXIO;
1214
1215 dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
1216
1217 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1218 if (!mmc)
1219 return -ENOMEM;
1220
1221 host = mmc_priv(mmc);
1222 host->pcr = pcr;
1223 host->mmc = mmc;
1224 host->pdev = pdev;
1225 host->power_state = SDMMC_POWER_OFF;
1226 platform_set_drvdata(pdev, host);
1227 pcr->slots[RTSX_SD_CARD].p_dev = pdev;
1228 pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
1229
1230 mutex_init(&host->host_mutex);
1231
1232 realtek_init_host(host);
1233
1234 mmc_add_host(mmc);
1235
1236 return 0;
1237}
1238
1239static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
1240{
1241 struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
1242 struct rtsx_pcr *pcr;
1243 struct mmc_host *mmc;
1244
1245 if (!host)
1246 return 0;
1247
1248 pcr = host->pcr;
1249 pcr->slots[RTSX_SD_CARD].p_dev = NULL;
1250 pcr->slots[RTSX_SD_CARD].card_event = NULL;
1251 mmc = host->mmc;
1252
1253 mutex_lock(&host->host_mutex);
1254 if (host->mrq) {
1255 dev_dbg(&(pdev->dev),
1256 "%s: Controller removed during transfer\n",
1257 mmc_hostname(mmc));
1258
1259 rtsx_pci_complete_unfinished_transfer(pcr);
1260
1261 host->mrq->cmd->error = -ENOMEDIUM;
1262 if (host->mrq->stop)
1263 host->mrq->stop->error = -ENOMEDIUM;
1264 mmc_request_done(mmc, host->mrq);
1265 }
1266 mutex_unlock(&host->host_mutex);
1267
1268 mmc_remove_host(mmc);
1269 host->eject = true;
1270
1271 mmc_free_host(mmc);
1272
1273 dev_dbg(&(pdev->dev),
1274 ": Realtek PCI-E SDMMC controller has been removed\n");
1275
1276 return 0;
1277}
1278
1279static struct platform_device_id rtsx_pci_sdmmc_ids[] = {
1280 {
1281 .name = DRV_NAME_RTSX_PCI_SDMMC,
1282 }, {
1283 /* sentinel */
1284 }
1285};
1286MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
1287
1288static struct platform_driver rtsx_pci_sdmmc_driver = {
1289 .probe = rtsx_pci_sdmmc_drv_probe,
1290 .remove = rtsx_pci_sdmmc_drv_remove,
1291 .id_table = rtsx_pci_sdmmc_ids,
1292 .driver = {
1293 .owner = THIS_MODULE,
1294 .name = DRV_NAME_RTSX_PCI_SDMMC,
1295 },
1296};
1297module_platform_driver(rtsx_pci_sdmmc_driver);
1298
1299MODULE_LICENSE("GPL");
1300MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1301MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");