Loading...
Note: File does not exist in v3.5.6.
1// SPDX-License-Identifier: GPL-2.0-only
2/* Realtek USB SD/MMC Card Interface driver
3 *
4 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
5 *
6 * Author:
7 * Roger Tseng <rogerable@realtek.com>
8 */
9
10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/delay.h>
13#include <linux/platform_device.h>
14#include <linux/usb.h>
15#include <linux/mmc/host.h>
16#include <linux/mmc/mmc.h>
17#include <linux/mmc/sd.h>
18#include <linux/mmc/card.h>
19#include <linux/scatterlist.h>
20#include <linux/pm.h>
21#include <linux/pm_runtime.h>
22
23#include <linux/rtsx_usb.h>
24#include <asm/unaligned.h>
25
26#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
27 defined(CONFIG_MMC_REALTEK_USB_MODULE))
28#include <linux/leds.h>
29#include <linux/workqueue.h>
30#define RTSX_USB_USE_LEDS_CLASS
31#endif
32
33struct rtsx_usb_sdmmc {
34 struct platform_device *pdev;
35 struct rtsx_ucr *ucr;
36 struct mmc_host *mmc;
37 struct mmc_request *mrq;
38
39 struct mutex host_mutex;
40
41 u8 ssc_depth;
42 unsigned int clock;
43 bool vpclk;
44 bool double_clk;
45 bool host_removal;
46 bool card_exist;
47 bool initial_mode;
48 bool ddr_mode;
49
50 unsigned char power_mode;
51
52#ifdef RTSX_USB_USE_LEDS_CLASS
53 struct led_classdev led;
54 char led_name[32];
55 struct work_struct led_work;
56#endif
57};
58
59static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host)
60{
61 return &(host->pdev->dev);
62}
63
64static inline void sd_clear_error(struct rtsx_usb_sdmmc *host)
65{
66 struct rtsx_ucr *ucr = host->ucr;
67 rtsx_usb_ep0_write_register(ucr, CARD_STOP,
68 SD_STOP | SD_CLR_ERR,
69 SD_STOP | SD_CLR_ERR);
70
71 rtsx_usb_clear_dma_err(ucr);
72 rtsx_usb_clear_fsm_err(ucr);
73}
74
75#ifdef DEBUG
76static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host)
77{
78 struct rtsx_ucr *ucr = host->ucr;
79 u8 val = 0;
80
81 rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val);
82 dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val);
83 rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val);
84 dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val);
85 rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val);
86 dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val);
87}
88#else
89#define sd_print_debug_regs(host)
90#endif /* DEBUG */
91
92static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
93 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
94{
95 struct rtsx_ucr *ucr = host->ucr;
96 int err;
97 u8 trans_mode;
98
99 if (!buf)
100 buf_len = 0;
101
102 rtsx_usb_init_cmd(ucr);
103 if (cmd != NULL) {
104 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__
105 , cmd->opcode);
106 if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
107 trans_mode = SD_TM_AUTO_TUNING;
108 else
109 trans_mode = SD_TM_NORMAL_READ;
110
111 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
112 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
113 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
114 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
115 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
116 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
117 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
118 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
119 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
120 SD_CMD4, 0xFF, (u8)cmd->arg);
121 } else {
122 trans_mode = SD_TM_AUTO_READ_3;
123 }
124
125 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
126 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
127 0xFF, (u8)(byte_cnt >> 8));
128 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
129 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
130
131 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
132 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
133 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
134 if (trans_mode != SD_TM_AUTO_TUNING)
135 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
136 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
137
138 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
139 0xFF, trans_mode | SD_TRANSFER_START);
140 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
141 SD_TRANSFER_END, SD_TRANSFER_END);
142
143 if (cmd != NULL) {
144 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
145 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
146 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
147 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
148 }
149
150 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
151 if (err) {
152 dev_dbg(sdmmc_dev(host),
153 "rtsx_usb_send_cmd failed (err = %d)\n", err);
154 return err;
155 }
156
157 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
158 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
159 sd_print_debug_regs(host);
160
161 if (!err) {
162 dev_dbg(sdmmc_dev(host),
163 "Transfer failed (SD_TRANSFER = %02x)\n",
164 ucr->rsp_buf[0]);
165 err = -EIO;
166 } else {
167 dev_dbg(sdmmc_dev(host),
168 "rtsx_usb_get_rsp failed (err = %d)\n", err);
169 }
170
171 return err;
172 }
173
174 if (cmd != NULL) {
175 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
176 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
177 cmd->resp[0]);
178 }
179
180 if (buf && buf_len) {
181 /* 2-byte aligned part */
182 err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2));
183 if (err) {
184 dev_dbg(sdmmc_dev(host),
185 "rtsx_usb_read_ppbuf failed (err = %d)\n", err);
186 return err;
187 }
188
189 /* unaligned byte */
190 if (byte_cnt % 2)
191 return rtsx_usb_read_register(ucr,
192 PPBUF_BASE2 + byte_cnt,
193 buf + byte_cnt - 1);
194 }
195
196 return 0;
197}
198
199static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
200 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
201{
202 struct rtsx_ucr *ucr = host->ucr;
203 int err;
204 u8 trans_mode;
205
206 if (!buf)
207 buf_len = 0;
208
209 if (buf && buf_len) {
210 err = rtsx_usb_write_ppbuf(ucr, buf, buf_len);
211 if (err) {
212 dev_dbg(sdmmc_dev(host),
213 "rtsx_usb_write_ppbuf failed (err = %d)\n",
214 err);
215 return err;
216 }
217 }
218
219 trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
220 rtsx_usb_init_cmd(ucr);
221
222 if (cmd != NULL) {
223 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__,
224 cmd->opcode);
225 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
226 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
227 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
228 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
229 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
230 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
231 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
232 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
233 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
234 SD_CMD4, 0xFF, (u8)cmd->arg);
235 }
236
237 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
238 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
239 0xFF, (u8)(byte_cnt >> 8));
240 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
241 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
242
243 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
244 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
245 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
246 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
247 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
248
249 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
250 trans_mode | SD_TRANSFER_START);
251 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
252 SD_TRANSFER_END, SD_TRANSFER_END);
253
254 if (cmd != NULL) {
255 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
256 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
257 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
258 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
259 }
260
261 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
262 if (err) {
263 dev_dbg(sdmmc_dev(host),
264 "rtsx_usb_send_cmd failed (err = %d)\n", err);
265 return err;
266 }
267
268 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
269 if (err) {
270 sd_print_debug_regs(host);
271 dev_dbg(sdmmc_dev(host),
272 "rtsx_usb_get_rsp failed (err = %d)\n", err);
273 return err;
274 }
275
276 if (cmd != NULL) {
277 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
278 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
279 cmd->resp[0]);
280 }
281
282 return 0;
283}
284
285static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host,
286 struct mmc_command *cmd)
287{
288 struct rtsx_ucr *ucr = host->ucr;
289 u8 cmd_idx = (u8)cmd->opcode;
290 u32 arg = cmd->arg;
291 int err = 0;
292 int timeout = 100;
293 int i;
294 u8 *ptr;
295 int stat_idx = 0;
296 int len = 2;
297 u8 rsp_type;
298
299 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
300 __func__, cmd_idx, arg);
301
302 /* Response type:
303 * R0
304 * R1, R5, R6, R7
305 * R1b
306 * R2
307 * R3, R4
308 */
309 switch (mmc_resp_type(cmd)) {
310 case MMC_RSP_NONE:
311 rsp_type = SD_RSP_TYPE_R0;
312 break;
313 case MMC_RSP_R1:
314 rsp_type = SD_RSP_TYPE_R1;
315 break;
316 case MMC_RSP_R1_NO_CRC:
317 rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
318 break;
319 case MMC_RSP_R1B:
320 rsp_type = SD_RSP_TYPE_R1b;
321 break;
322 case MMC_RSP_R2:
323 rsp_type = SD_RSP_TYPE_R2;
324 break;
325 case MMC_RSP_R3:
326 rsp_type = SD_RSP_TYPE_R3;
327 break;
328 default:
329 dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
330 err = -EINVAL;
331 goto out;
332 }
333
334 if (rsp_type == SD_RSP_TYPE_R1b)
335 timeout = cmd->busy_timeout ? cmd->busy_timeout : 3000;
336
337 if (cmd->opcode == SD_SWITCH_VOLTAGE) {
338 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
339 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
340 SD_CLK_TOGGLE_EN);
341 if (err)
342 goto out;
343 }
344
345 rtsx_usb_init_cmd(ucr);
346
347 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
348 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
349 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
350 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
351 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
352
353 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
354 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
355 0x01, PINGPONG_BUFFER);
356 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
357 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
358 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
359 SD_TRANSFER_END | SD_STAT_IDLE,
360 SD_TRANSFER_END | SD_STAT_IDLE);
361
362 if (rsp_type == SD_RSP_TYPE_R2) {
363 /* Read data from ping-pong buffer */
364 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
365 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
366 stat_idx = 16;
367 } else if (rsp_type != SD_RSP_TYPE_R0) {
368 /* Read data from SD_CMDx registers */
369 for (i = SD_CMD0; i <= SD_CMD4; i++)
370 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
371 stat_idx = 5;
372 }
373 len += stat_idx;
374
375 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0);
376
377 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
378 if (err) {
379 dev_dbg(sdmmc_dev(host),
380 "rtsx_usb_send_cmd error (err = %d)\n", err);
381 goto out;
382 }
383
384 err = rtsx_usb_get_rsp(ucr, len, timeout);
385 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
386 sd_print_debug_regs(host);
387 sd_clear_error(host);
388
389 if (!err) {
390 dev_dbg(sdmmc_dev(host),
391 "Transfer failed (SD_TRANSFER = %02x)\n",
392 ucr->rsp_buf[0]);
393 err = -EIO;
394 } else {
395 dev_dbg(sdmmc_dev(host),
396 "rtsx_usb_get_rsp failed (err = %d)\n", err);
397 }
398
399 goto out;
400 }
401
402 if (rsp_type == SD_RSP_TYPE_R0) {
403 err = 0;
404 goto out;
405 }
406
407 /* Skip result of CHECK_REG_CMD */
408 ptr = ucr->rsp_buf + 1;
409
410 /* Check (Start,Transmission) bit of Response */
411 if ((ptr[0] & 0xC0) != 0) {
412 err = -EILSEQ;
413 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
414 goto out;
415 }
416
417 /* Check CRC7 */
418 if (!(rsp_type & SD_NO_CHECK_CRC7)) {
419 if (ptr[stat_idx] & SD_CRC7_ERR) {
420 err = -EILSEQ;
421 dev_dbg(sdmmc_dev(host), "CRC7 error\n");
422 goto out;
423 }
424 }
425
426 if (rsp_type == SD_RSP_TYPE_R2) {
427 /*
428 * The controller offloads the last byte {CRC-7, end bit 1'b1}
429 * of response type R2. Assign dummy CRC, 0, and end bit to the
430 * byte(ptr[16], goes into the LSB of resp[3] later).
431 */
432 ptr[16] = 1;
433
434 for (i = 0; i < 4; i++) {
435 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
436 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
437 i, cmd->resp[i]);
438 }
439 } else {
440 cmd->resp[0] = get_unaligned_be32(ptr + 1);
441 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
442 cmd->resp[0]);
443 }
444
445out:
446 cmd->error = err;
447}
448
449static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq)
450{
451 struct rtsx_ucr *ucr = host->ucr;
452 struct mmc_data *data = mrq->data;
453 int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
454 u8 cfg2, trans_mode;
455 int err;
456 u8 flag;
457 size_t data_len = data->blksz * data->blocks;
458 unsigned int pipe;
459
460 if (read) {
461 dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n",
462 __func__, data_len);
463 cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
464 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
465 trans_mode = SD_TM_AUTO_READ_3;
466 } else {
467 dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n",
468 __func__, data_len);
469 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
470 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
471 trans_mode = SD_TM_AUTO_WRITE_3;
472 }
473
474 rtsx_usb_init_cmd(ucr);
475
476 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
477 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
478 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
479 0xFF, (u8)data->blocks);
480 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
481 0xFF, (u8)(data->blocks >> 8));
482
483 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
484 0x01, RING_BUFFER);
485
486 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
487 0xFF, (u8)(data_len >> 24));
488 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
489 0xFF, (u8)(data_len >> 16));
490 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
491 0xFF, (u8)(data_len >> 8));
492 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0,
493 0xFF, (u8)data_len);
494 if (read) {
495 flag = MODE_CDIR;
496 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
497 0x03 | DMA_PACK_SIZE_MASK,
498 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
499 } else {
500 flag = MODE_CDOR;
501 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
502 0x03 | DMA_PACK_SIZE_MASK,
503 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
504 }
505
506 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
507 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
508 trans_mode | SD_TRANSFER_START);
509 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
510 SD_TRANSFER_END, SD_TRANSFER_END);
511
512 err = rtsx_usb_send_cmd(ucr, flag, 100);
513 if (err)
514 return err;
515
516 if (read)
517 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
518 else
519 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
520
521 err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len,
522 data->sg_len, NULL, 10000);
523 if (err) {
524 dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n"
525 , err);
526 sd_clear_error(host);
527 return err;
528 }
529
530 return rtsx_usb_get_rsp(ucr, 1, 2000);
531}
532
533static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host)
534{
535 rtsx_usb_write_register(host->ucr, SD_CFG1,
536 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
537}
538
539static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host)
540{
541 rtsx_usb_write_register(host->ucr, SD_CFG1,
542 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
543}
544
545static void sd_normal_rw(struct rtsx_usb_sdmmc *host,
546 struct mmc_request *mrq)
547{
548 struct mmc_command *cmd = mrq->cmd;
549 struct mmc_data *data = mrq->data;
550 u8 *buf;
551
552 buf = kzalloc(data->blksz, GFP_NOIO);
553 if (!buf) {
554 cmd->error = -ENOMEM;
555 return;
556 }
557
558 if (data->flags & MMC_DATA_READ) {
559 if (host->initial_mode)
560 sd_disable_initial_mode(host);
561
562 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
563 data->blksz, 200);
564
565 if (host->initial_mode)
566 sd_enable_initial_mode(host);
567
568 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
569 } else {
570 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
571
572 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
573 data->blksz, 200);
574 }
575
576 kfree(buf);
577}
578
579static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
580{
581 struct rtsx_ucr *ucr = host->ucr;
582 int err;
583
584 dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
585 __func__, tx ? "TX" : "RX", sample_point);
586
587 rtsx_usb_init_cmd(ucr);
588
589 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
590
591 if (tx)
592 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
593 0x0F, sample_point);
594 else
595 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
596 0x0F, sample_point);
597
598 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
599 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
600 PHASE_NOT_RESET, PHASE_NOT_RESET);
601 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
602 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
603
604 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
605 if (err)
606 return err;
607
608 return 0;
609}
610
611static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
612{
613 idx &= MAX_PHASE;
614 return phase_map & (1 << idx);
615}
616
617static int get_phase_len(u32 phase_map, unsigned int idx)
618{
619 int i;
620
621 for (i = 0; i < MAX_PHASE + 1; i++) {
622 if (get_phase_point(phase_map, idx + i) == 0)
623 return i;
624 }
625 return MAX_PHASE + 1;
626}
627
628static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
629{
630 int start = 0, len = 0;
631 int start_final = 0, len_final = 0;
632 u8 final_phase = 0xFF;
633
634 if (phase_map == 0) {
635 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
636 return final_phase;
637 }
638
639 while (start < MAX_PHASE + 1) {
640 len = get_phase_len(phase_map, start);
641 if (len_final < len) {
642 start_final = start;
643 len_final = len;
644 }
645 start += len ? len : 1;
646 }
647
648 final_phase = (start_final + len_final / 2) & MAX_PHASE;
649 dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
650 phase_map, len_final, final_phase);
651
652 return final_phase;
653}
654
655static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
656{
657 int i;
658 u8 val = 0;
659
660 for (i = 0; i < 100; i++) {
661 rtsx_usb_ep0_read_register(host->ucr, SD_DATA_STATE, &val);
662 if (val & SD_DATA_IDLE)
663 return;
664
665 usleep_range(100, 1000);
666 }
667}
668
669static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
670 u8 opcode, u8 sample_point)
671{
672 int err;
673 struct mmc_command cmd = {};
674
675 err = sd_change_phase(host, sample_point, 0);
676 if (err)
677 return err;
678
679 cmd.opcode = MMC_SEND_TUNING_BLOCK;
680 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
681 if (err) {
682 /* Wait till SD DATA IDLE */
683 sd_wait_data_idle(host);
684 sd_clear_error(host);
685 return err;
686 }
687
688 return 0;
689}
690
691static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
692 u8 opcode, u16 *phase_map)
693{
694 int err, i;
695 u16 raw_phase_map = 0;
696
697 for (i = MAX_PHASE; i >= 0; i--) {
698 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
699 if (!err)
700 raw_phase_map |= 1 << i;
701 }
702
703 if (phase_map)
704 *phase_map = raw_phase_map;
705}
706
707static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
708{
709 int err, i;
710 u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
711 u8 final_phase;
712
713 /* setting fixed default TX phase */
714 err = sd_change_phase(host, 0x01, 1);
715 if (err) {
716 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
717 return err;
718 }
719
720 /* tuning RX phase */
721 for (i = 0; i < RX_TUNING_CNT; i++) {
722 sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
723
724 if (raw_phase_map[i] == 0)
725 break;
726 }
727
728 phase_map = 0xFFFF;
729 for (i = 0; i < RX_TUNING_CNT; i++) {
730 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
731 i, raw_phase_map[i]);
732 phase_map &= raw_phase_map[i];
733 }
734 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
735
736 if (phase_map) {
737 final_phase = sd_search_final_phase(host, phase_map);
738 if (final_phase == 0xFF)
739 return -EINVAL;
740
741 err = sd_change_phase(host, final_phase, 0);
742 if (err)
743 return err;
744 } else {
745 return -EINVAL;
746 }
747
748 return 0;
749}
750
751static int sdmmc_get_ro(struct mmc_host *mmc)
752{
753 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
754 struct rtsx_ucr *ucr = host->ucr;
755 int err;
756 u16 val;
757
758 if (host->host_removal)
759 return -ENOMEDIUM;
760
761 mutex_lock(&ucr->dev_mutex);
762
763 /* Check SD card detect */
764 err = rtsx_usb_get_card_status(ucr, &val);
765
766 mutex_unlock(&ucr->dev_mutex);
767
768
769 /* Treat failed detection as non-ro */
770 if (err)
771 return 0;
772
773 if (val & SD_WP)
774 return 1;
775
776 return 0;
777}
778
779static int sdmmc_get_cd(struct mmc_host *mmc)
780{
781 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
782 struct rtsx_ucr *ucr = host->ucr;
783 int err;
784 u16 val;
785
786 if (host->host_removal)
787 return -ENOMEDIUM;
788
789 mutex_lock(&ucr->dev_mutex);
790
791 /* Check SD card detect */
792 err = rtsx_usb_get_card_status(ucr, &val);
793
794 mutex_unlock(&ucr->dev_mutex);
795
796 /* Treat failed detection as non-exist */
797 if (err)
798 goto no_card;
799
800 if (val & SD_CD) {
801 host->card_exist = true;
802 return 1;
803 }
804
805no_card:
806 host->card_exist = false;
807 return 0;
808}
809
810static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
811{
812 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
813 struct rtsx_ucr *ucr = host->ucr;
814 struct mmc_command *cmd = mrq->cmd;
815 struct mmc_data *data = mrq->data;
816 unsigned int data_size = 0;
817
818 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
819
820 if (host->host_removal) {
821 cmd->error = -ENOMEDIUM;
822 goto finish;
823 }
824
825 if ((!host->card_exist)) {
826 cmd->error = -ENOMEDIUM;
827 goto finish_detect_card;
828 }
829
830 mutex_lock(&ucr->dev_mutex);
831
832 mutex_lock(&host->host_mutex);
833 host->mrq = mrq;
834 mutex_unlock(&host->host_mutex);
835
836 if (mrq->data)
837 data_size = data->blocks * data->blksz;
838
839 if (!data_size) {
840 sd_send_cmd_get_rsp(host, cmd);
841 } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
842 mmc_op_multi(cmd->opcode)) {
843 sd_send_cmd_get_rsp(host, cmd);
844
845 if (!cmd->error) {
846 sd_rw_multi(host, mrq);
847
848 if (mmc_op_multi(cmd->opcode) && mrq->stop) {
849 sd_send_cmd_get_rsp(host, mrq->stop);
850 rtsx_usb_write_register(ucr, MC_FIFO_CTL,
851 FIFO_FLUSH, FIFO_FLUSH);
852 }
853 }
854 } else {
855 sd_normal_rw(host, mrq);
856 }
857
858 if (mrq->data) {
859 if (cmd->error || data->error)
860 data->bytes_xfered = 0;
861 else
862 data->bytes_xfered = data->blocks * data->blksz;
863 }
864
865 mutex_unlock(&ucr->dev_mutex);
866
867finish_detect_card:
868 if (cmd->error) {
869 /*
870 * detect card when fail to update card existence state and
871 * speed up card removal when retry
872 */
873 sdmmc_get_cd(mmc);
874 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
875 }
876
877finish:
878 mutex_lock(&host->host_mutex);
879 host->mrq = NULL;
880 mutex_unlock(&host->host_mutex);
881
882 mmc_request_done(mmc, mrq);
883}
884
885static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
886 unsigned char bus_width)
887{
888 int err = 0;
889 static const u8 width[] = {
890 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
891 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
892 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
893 };
894
895 if (bus_width <= MMC_BUS_WIDTH_8)
896 err = rtsx_usb_write_register(host->ucr, SD_CFG1,
897 0x03, width[bus_width]);
898
899 return err;
900}
901
902static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
903{
904 rtsx_usb_init_cmd(ucr);
905
906 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
907 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
908 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
909 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
910 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
911 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
912
913 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
914}
915
916static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
917{
918 rtsx_usb_init_cmd(ucr);
919
920 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
921 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
922 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
923 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
924 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
925 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
926
927 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
928}
929
930static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
931{
932 rtsx_usb_init_cmd(ucr);
933
934 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
935 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
936 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
937 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
938 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
939 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
940
941 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
942}
943
944static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
945{
946 rtsx_usb_init_cmd(ucr);
947
948 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
949 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
950 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
951 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
952 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
953 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
954
955 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
956}
957
958static int sd_power_on(struct rtsx_usb_sdmmc *host)
959{
960 struct rtsx_ucr *ucr = host->ucr;
961 int err;
962
963 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
964 rtsx_usb_init_cmd(ucr);
965 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
966 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
967 CARD_SHARE_MASK, CARD_SHARE_SD);
968 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
969 SD_CLK_EN, SD_CLK_EN);
970 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
971 if (err)
972 return err;
973
974 if (CHECK_PKG(ucr, LQFP48))
975 err = sd_pull_ctl_enable_lqfp48(ucr);
976 else
977 err = sd_pull_ctl_enable_qfn24(ucr);
978 if (err)
979 return err;
980
981 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
982 POWER_MASK, PARTIAL_POWER_ON);
983 if (err)
984 return err;
985
986 usleep_range(800, 1000);
987
988 rtsx_usb_init_cmd(ucr);
989 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
990 POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
991 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
992 SD_OUTPUT_EN, SD_OUTPUT_EN);
993
994 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
995}
996
997static int sd_power_off(struct rtsx_usb_sdmmc *host)
998{
999 struct rtsx_ucr *ucr = host->ucr;
1000 int err;
1001
1002 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1003 rtsx_usb_init_cmd(ucr);
1004
1005 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
1006 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
1007 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1008 POWER_MASK, POWER_OFF);
1009 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1010 POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
1011
1012 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1013 if (err)
1014 return err;
1015
1016 if (CHECK_PKG(ucr, LQFP48))
1017 return sd_pull_ctl_disable_lqfp48(ucr);
1018 return sd_pull_ctl_disable_qfn24(ucr);
1019}
1020
1021static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
1022 unsigned char power_mode)
1023{
1024 int err;
1025
1026 if (power_mode != MMC_POWER_OFF)
1027 power_mode = MMC_POWER_ON;
1028
1029 if (power_mode == host->power_mode)
1030 return 0;
1031
1032 if (power_mode == MMC_POWER_OFF) {
1033 err = sd_power_off(host);
1034 pm_runtime_put_noidle(sdmmc_dev(host));
1035 } else {
1036 pm_runtime_get_noresume(sdmmc_dev(host));
1037 err = sd_power_on(host);
1038 }
1039
1040 if (!err)
1041 host->power_mode = power_mode;
1042
1043 return err;
1044}
1045
1046static int sd_set_timing(struct rtsx_usb_sdmmc *host,
1047 unsigned char timing, bool *ddr_mode)
1048{
1049 struct rtsx_ucr *ucr = host->ucr;
1050 int err;
1051
1052 *ddr_mode = false;
1053
1054 rtsx_usb_init_cmd(ucr);
1055
1056 switch (timing) {
1057 case MMC_TIMING_UHS_SDR104:
1058 case MMC_TIMING_UHS_SDR50:
1059 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1060 0x0C | SD_ASYNC_FIFO_RST,
1061 SD_30_MODE | SD_ASYNC_FIFO_RST);
1062 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1063 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1064 break;
1065
1066 case MMC_TIMING_UHS_DDR50:
1067 *ddr_mode = true;
1068
1069 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1070 0x0C | SD_ASYNC_FIFO_RST,
1071 SD_DDR_MODE | SD_ASYNC_FIFO_RST);
1072 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1073 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1074 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1075 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1076 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1077 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1078 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1079 break;
1080
1081 case MMC_TIMING_MMC_HS:
1082 case MMC_TIMING_SD_HS:
1083 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1084 0x0C, SD_20_MODE);
1085 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1086 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1087 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1088 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1089 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1090 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1091 break;
1092
1093 default:
1094 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1095 SD_CFG1, 0x0C, SD_20_MODE);
1096 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1097 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1098 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1099 SD_PUSH_POINT_CTL, 0xFF, 0);
1100 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1101 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1102 break;
1103 }
1104
1105 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1106
1107 return err;
1108}
1109
1110static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1111{
1112 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1113 struct rtsx_ucr *ucr = host->ucr;
1114
1115 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1116 mutex_lock(&ucr->dev_mutex);
1117
1118 sd_set_power_mode(host, ios->power_mode);
1119 sd_set_bus_width(host, ios->bus_width);
1120 sd_set_timing(host, ios->timing, &host->ddr_mode);
1121
1122 host->vpclk = false;
1123 host->double_clk = true;
1124
1125 switch (ios->timing) {
1126 case MMC_TIMING_UHS_SDR104:
1127 case MMC_TIMING_UHS_SDR50:
1128 host->ssc_depth = SSC_DEPTH_2M;
1129 host->vpclk = true;
1130 host->double_clk = false;
1131 break;
1132 case MMC_TIMING_UHS_DDR50:
1133 case MMC_TIMING_UHS_SDR25:
1134 host->ssc_depth = SSC_DEPTH_1M;
1135 break;
1136 default:
1137 host->ssc_depth = SSC_DEPTH_512K;
1138 break;
1139 }
1140
1141 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1142 host->clock = ios->clock;
1143
1144 rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
1145 host->initial_mode, host->double_clk, host->vpclk);
1146
1147 mutex_unlock(&ucr->dev_mutex);
1148 dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
1149}
1150
1151static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1152{
1153 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1154 struct rtsx_ucr *ucr = host->ucr;
1155 int err = 0;
1156
1157 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1158 __func__, ios->signal_voltage);
1159
1160 if (host->host_removal)
1161 return -ENOMEDIUM;
1162
1163 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
1164 return -EPERM;
1165
1166 mutex_lock(&ucr->dev_mutex);
1167
1168 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
1169 if (err) {
1170 mutex_unlock(&ucr->dev_mutex);
1171 return err;
1172 }
1173
1174 /* Let mmc core do the busy checking, simply stop the forced-toggle
1175 * clock(while issuing CMD11) and switch voltage.
1176 */
1177 rtsx_usb_init_cmd(ucr);
1178
1179 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1180 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1181 SD_IO_USING_1V8, SD_IO_USING_3V3);
1182 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1183 TUNE_SD18_MASK, TUNE_SD18_3V3);
1184 } else {
1185 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
1186 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1187 SD_CLK_FORCE_STOP);
1188 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1189 SD_IO_USING_1V8, SD_IO_USING_1V8);
1190 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1191 TUNE_SD18_MASK, TUNE_SD18_1V8);
1192 }
1193
1194 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1195 mutex_unlock(&ucr->dev_mutex);
1196
1197 return err;
1198}
1199
1200static int sdmmc_card_busy(struct mmc_host *mmc)
1201{
1202 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1203 struct rtsx_ucr *ucr = host->ucr;
1204 int err;
1205 u8 stat;
1206 u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
1207 | SD_DAT0_STATUS;
1208
1209 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1210
1211 mutex_lock(&ucr->dev_mutex);
1212
1213 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1214 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1215 SD_CLK_TOGGLE_EN);
1216 if (err)
1217 goto out;
1218
1219 mdelay(1);
1220
1221 err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
1222 if (err)
1223 goto out;
1224
1225 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1226 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1227out:
1228 mutex_unlock(&ucr->dev_mutex);
1229
1230 if (err)
1231 return err;
1232
1233 /* check if any pin between dat[0:3] is low */
1234 if ((stat & mask) != mask)
1235 return 1;
1236 else
1237 return 0;
1238}
1239
1240static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1241{
1242 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1243 struct rtsx_ucr *ucr = host->ucr;
1244 int err = 0;
1245
1246 if (host->host_removal)
1247 return -ENOMEDIUM;
1248
1249 mutex_lock(&ucr->dev_mutex);
1250
1251 if (!host->ddr_mode)
1252 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
1253
1254 mutex_unlock(&ucr->dev_mutex);
1255
1256 return err;
1257}
1258
1259static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
1260 .request = sdmmc_request,
1261 .set_ios = sdmmc_set_ios,
1262 .get_ro = sdmmc_get_ro,
1263 .get_cd = sdmmc_get_cd,
1264 .start_signal_voltage_switch = sdmmc_switch_voltage,
1265 .card_busy = sdmmc_card_busy,
1266 .execute_tuning = sdmmc_execute_tuning,
1267};
1268
1269#ifdef RTSX_USB_USE_LEDS_CLASS
1270static void rtsx_usb_led_control(struct led_classdev *led,
1271 enum led_brightness brightness)
1272{
1273 struct rtsx_usb_sdmmc *host = container_of(led,
1274 struct rtsx_usb_sdmmc, led);
1275
1276 if (host->host_removal)
1277 return;
1278
1279 host->led.brightness = brightness;
1280 schedule_work(&host->led_work);
1281}
1282
1283static void rtsx_usb_update_led(struct work_struct *work)
1284{
1285 struct rtsx_usb_sdmmc *host =
1286 container_of(work, struct rtsx_usb_sdmmc, led_work);
1287 struct rtsx_ucr *ucr = host->ucr;
1288
1289 pm_runtime_get_noresume(sdmmc_dev(host));
1290 mutex_lock(&ucr->dev_mutex);
1291
1292 if (host->power_mode == MMC_POWER_OFF)
1293 goto out;
1294
1295 if (host->led.brightness == LED_OFF)
1296 rtsx_usb_turn_off_led(ucr);
1297 else
1298 rtsx_usb_turn_on_led(ucr);
1299
1300out:
1301 mutex_unlock(&ucr->dev_mutex);
1302 pm_runtime_put_sync_suspend(sdmmc_dev(host));
1303}
1304#endif
1305
1306static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
1307{
1308 struct mmc_host *mmc = host->mmc;
1309
1310 mmc->f_min = 250000;
1311 mmc->f_max = 208000000;
1312 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1313 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1314 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1315 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
1316 MMC_CAP_SYNC_RUNTIME_PM;
1317 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
1318 MMC_CAP2_NO_SDIO;
1319
1320 mmc->max_current_330 = 400;
1321 mmc->max_current_180 = 800;
1322 mmc->ops = &rtsx_usb_sdmmc_ops;
1323 mmc->max_segs = 256;
1324 mmc->max_seg_size = 65536;
1325 mmc->max_blk_size = 512;
1326 mmc->max_blk_count = 65535;
1327 mmc->max_req_size = 524288;
1328
1329 host->power_mode = MMC_POWER_OFF;
1330}
1331
1332static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
1333{
1334 struct mmc_host *mmc;
1335 struct rtsx_usb_sdmmc *host;
1336 struct rtsx_ucr *ucr;
1337#ifdef RTSX_USB_USE_LEDS_CLASS
1338 int err;
1339#endif
1340
1341 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
1342 if (!ucr)
1343 return -ENXIO;
1344
1345 dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
1346
1347 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1348 if (!mmc)
1349 return -ENOMEM;
1350
1351 host = mmc_priv(mmc);
1352 host->ucr = ucr;
1353 host->mmc = mmc;
1354 host->pdev = pdev;
1355 platform_set_drvdata(pdev, host);
1356
1357 mutex_init(&host->host_mutex);
1358 rtsx_usb_init_host(host);
1359 pm_runtime_enable(&pdev->dev);
1360
1361#ifdef RTSX_USB_USE_LEDS_CLASS
1362 snprintf(host->led_name, sizeof(host->led_name),
1363 "%s::", mmc_hostname(mmc));
1364 host->led.name = host->led_name;
1365 host->led.brightness = LED_OFF;
1366 host->led.default_trigger = mmc_hostname(mmc);
1367 host->led.brightness_set = rtsx_usb_led_control;
1368
1369 err = led_classdev_register(mmc_dev(mmc), &host->led);
1370 if (err)
1371 dev_err(&(pdev->dev),
1372 "Failed to register LED device: %d\n", err);
1373 INIT_WORK(&host->led_work, rtsx_usb_update_led);
1374
1375#endif
1376 mmc_add_host(mmc);
1377
1378 return 0;
1379}
1380
1381static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
1382{
1383 struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
1384 struct mmc_host *mmc;
1385
1386 if (!host)
1387 return 0;
1388
1389 mmc = host->mmc;
1390 host->host_removal = true;
1391
1392 mutex_lock(&host->host_mutex);
1393 if (host->mrq) {
1394 dev_dbg(&(pdev->dev),
1395 "%s: Controller removed during transfer\n",
1396 mmc_hostname(mmc));
1397 host->mrq->cmd->error = -ENOMEDIUM;
1398 if (host->mrq->stop)
1399 host->mrq->stop->error = -ENOMEDIUM;
1400 mmc_request_done(mmc, host->mrq);
1401 }
1402 mutex_unlock(&host->host_mutex);
1403
1404 mmc_remove_host(mmc);
1405
1406#ifdef RTSX_USB_USE_LEDS_CLASS
1407 cancel_work_sync(&host->led_work);
1408 led_classdev_unregister(&host->led);
1409#endif
1410
1411 mmc_free_host(mmc);
1412 pm_runtime_disable(&pdev->dev);
1413 platform_set_drvdata(pdev, NULL);
1414
1415 dev_dbg(&(pdev->dev),
1416 ": Realtek USB SD/MMC module has been removed\n");
1417
1418 return 0;
1419}
1420
1421#ifdef CONFIG_PM
1422static int rtsx_usb_sdmmc_runtime_suspend(struct device *dev)
1423{
1424 struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1425
1426 host->mmc->caps &= ~MMC_CAP_NEEDS_POLL;
1427 return 0;
1428}
1429
1430static int rtsx_usb_sdmmc_runtime_resume(struct device *dev)
1431{
1432 struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1433
1434 host->mmc->caps |= MMC_CAP_NEEDS_POLL;
1435 if (sdmmc_get_cd(host->mmc) == 1)
1436 mmc_detect_change(host->mmc, 0);
1437 return 0;
1438}
1439#endif
1440
1441static const struct dev_pm_ops rtsx_usb_sdmmc_dev_pm_ops = {
1442 SET_RUNTIME_PM_OPS(rtsx_usb_sdmmc_runtime_suspend,
1443 rtsx_usb_sdmmc_runtime_resume, NULL)
1444};
1445
1446static const struct platform_device_id rtsx_usb_sdmmc_ids[] = {
1447 {
1448 .name = "rtsx_usb_sdmmc",
1449 }, {
1450 /* sentinel */
1451 }
1452};
1453MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
1454
1455static struct platform_driver rtsx_usb_sdmmc_driver = {
1456 .probe = rtsx_usb_sdmmc_drv_probe,
1457 .remove = rtsx_usb_sdmmc_drv_remove,
1458 .id_table = rtsx_usb_sdmmc_ids,
1459 .driver = {
1460 .name = "rtsx_usb_sdmmc",
1461 .pm = &rtsx_usb_sdmmc_dev_pm_ops,
1462 },
1463};
1464module_platform_driver(rtsx_usb_sdmmc_driver);
1465
1466MODULE_LICENSE("GPL v2");
1467MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
1468MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");