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
33 struct 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
sdmmc_dev(struct rtsx_usb_sdmmc * host)59 static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host)
60 {
61 return &(host->pdev->dev);
62 }
63
sd_clear_error(struct rtsx_usb_sdmmc * host)64 static 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
sd_print_debug_regs(struct rtsx_usb_sdmmc * host)76 static 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
sd_read_data(struct rtsx_usb_sdmmc * host,struct mmc_command * cmd,u16 byte_cnt,u8 * buf,int buf_len,int timeout)92 static 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
sd_write_data(struct rtsx_usb_sdmmc * host,struct mmc_command * cmd,u16 byte_cnt,u8 * buf,int buf_len,int timeout)199 static 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
sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc * host,struct mmc_command * cmd)285 static 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
445 out:
446 cmd->error = err;
447 }
448
sd_rw_multi(struct rtsx_usb_sdmmc * host,struct mmc_request * mrq)449 static 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
sd_enable_initial_mode(struct rtsx_usb_sdmmc * host)533 static 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
sd_disable_initial_mode(struct rtsx_usb_sdmmc * host)539 static 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
sd_normal_rw(struct rtsx_usb_sdmmc * host,struct mmc_request * mrq)545 static 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
sd_change_phase(struct rtsx_usb_sdmmc * host,u8 sample_point,int tx)579 static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
580 {
581 struct rtsx_ucr *ucr = host->ucr;
582
583 dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
584 __func__, tx ? "TX" : "RX", sample_point);
585
586 rtsx_usb_init_cmd(ucr);
587
588 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
589
590 if (tx)
591 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
592 0x0F, sample_point);
593 else
594 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
595 0x0F, sample_point);
596
597 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
598 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
599 PHASE_NOT_RESET, PHASE_NOT_RESET);
600 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
601 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
602
603 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
604 }
605
get_phase_point(u32 phase_map,unsigned int idx)606 static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
607 {
608 idx &= MAX_PHASE;
609 return phase_map & (1 << idx);
610 }
611
get_phase_len(u32 phase_map,unsigned int idx)612 static int get_phase_len(u32 phase_map, unsigned int idx)
613 {
614 int i;
615
616 for (i = 0; i < MAX_PHASE + 1; i++) {
617 if (get_phase_point(phase_map, idx + i) == 0)
618 return i;
619 }
620 return MAX_PHASE + 1;
621 }
622
sd_search_final_phase(struct rtsx_usb_sdmmc * host,u32 phase_map)623 static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
624 {
625 int start = 0, len = 0;
626 int start_final = 0, len_final = 0;
627 u8 final_phase = 0xFF;
628
629 if (phase_map == 0) {
630 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
631 return final_phase;
632 }
633
634 while (start < MAX_PHASE + 1) {
635 len = get_phase_len(phase_map, start);
636 if (len_final < len) {
637 start_final = start;
638 len_final = len;
639 }
640 start += len ? len : 1;
641 }
642
643 final_phase = (start_final + len_final / 2) & MAX_PHASE;
644 dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
645 phase_map, len_final, final_phase);
646
647 return final_phase;
648 }
649
sd_wait_data_idle(struct rtsx_usb_sdmmc * host)650 static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
651 {
652 int i;
653 u8 val = 0;
654
655 for (i = 0; i < 100; i++) {
656 rtsx_usb_ep0_read_register(host->ucr, SD_DATA_STATE, &val);
657 if (val & SD_DATA_IDLE)
658 return;
659
660 usleep_range(100, 1000);
661 }
662 }
663
sd_tuning_rx_cmd(struct rtsx_usb_sdmmc * host,u8 opcode,u8 sample_point)664 static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
665 u8 opcode, u8 sample_point)
666 {
667 int err;
668 struct mmc_command cmd = {};
669
670 err = sd_change_phase(host, sample_point, 0);
671 if (err)
672 return err;
673
674 cmd.opcode = MMC_SEND_TUNING_BLOCK;
675 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
676 if (err) {
677 /* Wait till SD DATA IDLE */
678 sd_wait_data_idle(host);
679 sd_clear_error(host);
680 return err;
681 }
682
683 return 0;
684 }
685
sd_tuning_phase(struct rtsx_usb_sdmmc * host,u8 opcode,u16 * phase_map)686 static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
687 u8 opcode, u16 *phase_map)
688 {
689 int err, i;
690 u16 raw_phase_map = 0;
691
692 for (i = MAX_PHASE; i >= 0; i--) {
693 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
694 if (!err)
695 raw_phase_map |= 1 << i;
696 }
697
698 if (phase_map)
699 *phase_map = raw_phase_map;
700 }
701
sd_tuning_rx(struct rtsx_usb_sdmmc * host,u8 opcode)702 static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
703 {
704 int err, i;
705 u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
706 u8 final_phase;
707
708 /* setting fixed default TX phase */
709 err = sd_change_phase(host, 0x01, 1);
710 if (err) {
711 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
712 return err;
713 }
714
715 /* tuning RX phase */
716 for (i = 0; i < RX_TUNING_CNT; i++) {
717 sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
718
719 if (raw_phase_map[i] == 0)
720 break;
721 }
722
723 phase_map = 0xFFFF;
724 for (i = 0; i < RX_TUNING_CNT; i++) {
725 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
726 i, raw_phase_map[i]);
727 phase_map &= raw_phase_map[i];
728 }
729 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
730
731 if (phase_map) {
732 final_phase = sd_search_final_phase(host, phase_map);
733 if (final_phase == 0xFF)
734 return -EINVAL;
735
736 err = sd_change_phase(host, final_phase, 0);
737 if (err)
738 return err;
739 } else {
740 return -EINVAL;
741 }
742
743 return 0;
744 }
745
sdmmc_get_ro(struct mmc_host * mmc)746 static int sdmmc_get_ro(struct mmc_host *mmc)
747 {
748 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
749 struct rtsx_ucr *ucr = host->ucr;
750 int err;
751 u16 val;
752
753 if (host->host_removal)
754 return -ENOMEDIUM;
755
756 mutex_lock(&ucr->dev_mutex);
757
758 /* Check SD card detect */
759 err = rtsx_usb_get_card_status(ucr, &val);
760
761 mutex_unlock(&ucr->dev_mutex);
762
763
764 /* Treat failed detection as non-ro */
765 if (err)
766 return 0;
767
768 if (val & SD_WP)
769 return 1;
770
771 return 0;
772 }
773
sdmmc_get_cd(struct mmc_host * mmc)774 static int sdmmc_get_cd(struct mmc_host *mmc)
775 {
776 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
777 struct rtsx_ucr *ucr = host->ucr;
778 int err;
779 u16 val;
780
781 if (host->host_removal)
782 return -ENOMEDIUM;
783
784 mutex_lock(&ucr->dev_mutex);
785
786 /* Check SD card detect */
787 err = rtsx_usb_get_card_status(ucr, &val);
788
789 mutex_unlock(&ucr->dev_mutex);
790
791 /* Treat failed detection as non-exist */
792 if (err)
793 goto no_card;
794
795 if (val & SD_CD) {
796 host->card_exist = true;
797 return 1;
798 }
799
800 no_card:
801 host->card_exist = false;
802 return 0;
803 }
804
sdmmc_request(struct mmc_host * mmc,struct mmc_request * mrq)805 static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
806 {
807 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
808 struct rtsx_ucr *ucr = host->ucr;
809 struct mmc_command *cmd = mrq->cmd;
810 struct mmc_data *data = mrq->data;
811 unsigned int data_size = 0;
812
813 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
814
815 if (host->host_removal) {
816 cmd->error = -ENOMEDIUM;
817 goto finish;
818 }
819
820 if ((!host->card_exist)) {
821 cmd->error = -ENOMEDIUM;
822 goto finish_detect_card;
823 }
824
825 mutex_lock(&ucr->dev_mutex);
826
827 mutex_lock(&host->host_mutex);
828 host->mrq = mrq;
829 mutex_unlock(&host->host_mutex);
830
831 if (mrq->data)
832 data_size = data->blocks * data->blksz;
833
834 if (!data_size) {
835 sd_send_cmd_get_rsp(host, cmd);
836 } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
837 mmc_op_multi(cmd->opcode)) {
838 sd_send_cmd_get_rsp(host, cmd);
839
840 if (!cmd->error) {
841 sd_rw_multi(host, mrq);
842
843 if (mmc_op_multi(cmd->opcode) && mrq->stop) {
844 sd_send_cmd_get_rsp(host, mrq->stop);
845 rtsx_usb_write_register(ucr, MC_FIFO_CTL,
846 FIFO_FLUSH, FIFO_FLUSH);
847 }
848 }
849 } else {
850 sd_normal_rw(host, mrq);
851 }
852
853 if (mrq->data) {
854 if (cmd->error || data->error)
855 data->bytes_xfered = 0;
856 else
857 data->bytes_xfered = data->blocks * data->blksz;
858 }
859
860 mutex_unlock(&ucr->dev_mutex);
861
862 finish_detect_card:
863 if (cmd->error) {
864 /*
865 * detect card when fail to update card existence state and
866 * speed up card removal when retry
867 */
868 sdmmc_get_cd(mmc);
869 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
870 }
871
872 finish:
873 mutex_lock(&host->host_mutex);
874 host->mrq = NULL;
875 mutex_unlock(&host->host_mutex);
876
877 mmc_request_done(mmc, mrq);
878 }
879
sd_set_bus_width(struct rtsx_usb_sdmmc * host,unsigned char bus_width)880 static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
881 unsigned char bus_width)
882 {
883 int err = 0;
884 static const u8 width[] = {
885 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
886 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
887 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
888 };
889
890 if (bus_width <= MMC_BUS_WIDTH_8)
891 err = rtsx_usb_write_register(host->ucr, SD_CFG1,
892 0x03, width[bus_width]);
893
894 return err;
895 }
896
sd_pull_ctl_disable_lqfp48(struct rtsx_ucr * ucr)897 static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
898 {
899 rtsx_usb_init_cmd(ucr);
900
901 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
902 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
903 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
904 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
905 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
906 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
907
908 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
909 }
910
sd_pull_ctl_disable_qfn24(struct rtsx_ucr * ucr)911 static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
912 {
913 rtsx_usb_init_cmd(ucr);
914
915 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
916 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
917 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
918 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
919 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
920 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
921
922 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
923 }
924
sd_pull_ctl_enable_lqfp48(struct rtsx_ucr * ucr)925 static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
926 {
927 rtsx_usb_init_cmd(ucr);
928
929 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
930 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
931 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
932 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
933 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
934 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
935
936 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
937 }
938
sd_pull_ctl_enable_qfn24(struct rtsx_ucr * ucr)939 static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
940 {
941 rtsx_usb_init_cmd(ucr);
942
943 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
944 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
945 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
946 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
947 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
948 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
949
950 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
951 }
952
sd_power_on(struct rtsx_usb_sdmmc * host)953 static int sd_power_on(struct rtsx_usb_sdmmc *host)
954 {
955 struct rtsx_ucr *ucr = host->ucr;
956 int err;
957
958 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
959 rtsx_usb_init_cmd(ucr);
960 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
961 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
962 CARD_SHARE_MASK, CARD_SHARE_SD);
963 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
964 SD_CLK_EN, SD_CLK_EN);
965 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
966 if (err)
967 return err;
968
969 if (CHECK_PKG(ucr, LQFP48))
970 err = sd_pull_ctl_enable_lqfp48(ucr);
971 else
972 err = sd_pull_ctl_enable_qfn24(ucr);
973 if (err)
974 return err;
975
976 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
977 POWER_MASK, PARTIAL_POWER_ON);
978 if (err)
979 return err;
980
981 usleep_range(800, 1000);
982
983 rtsx_usb_init_cmd(ucr);
984 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
985 POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
986 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
987 SD_OUTPUT_EN, SD_OUTPUT_EN);
988
989 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
990 }
991
sd_power_off(struct rtsx_usb_sdmmc * host)992 static int sd_power_off(struct rtsx_usb_sdmmc *host)
993 {
994 struct rtsx_ucr *ucr = host->ucr;
995 int err;
996
997 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
998 rtsx_usb_init_cmd(ucr);
999
1000 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
1001 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
1002 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1003 POWER_MASK, POWER_OFF);
1004 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1005 POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
1006
1007 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1008 if (err)
1009 return err;
1010
1011 if (CHECK_PKG(ucr, LQFP48))
1012 return sd_pull_ctl_disable_lqfp48(ucr);
1013 return sd_pull_ctl_disable_qfn24(ucr);
1014 }
1015
sd_set_power_mode(struct rtsx_usb_sdmmc * host,unsigned char power_mode)1016 static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
1017 unsigned char power_mode)
1018 {
1019 int err;
1020
1021 if (power_mode != MMC_POWER_OFF)
1022 power_mode = MMC_POWER_ON;
1023
1024 if (power_mode == host->power_mode)
1025 return 0;
1026
1027 if (power_mode == MMC_POWER_OFF) {
1028 err = sd_power_off(host);
1029 pm_runtime_put_noidle(sdmmc_dev(host));
1030 } else {
1031 pm_runtime_get_noresume(sdmmc_dev(host));
1032 err = sd_power_on(host);
1033 }
1034
1035 if (!err)
1036 host->power_mode = power_mode;
1037
1038 return err;
1039 }
1040
sd_set_timing(struct rtsx_usb_sdmmc * host,unsigned char timing,bool * ddr_mode)1041 static int sd_set_timing(struct rtsx_usb_sdmmc *host,
1042 unsigned char timing, bool *ddr_mode)
1043 {
1044 struct rtsx_ucr *ucr = host->ucr;
1045
1046 *ddr_mode = false;
1047
1048 rtsx_usb_init_cmd(ucr);
1049
1050 switch (timing) {
1051 case MMC_TIMING_UHS_SDR104:
1052 case MMC_TIMING_UHS_SDR50:
1053 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1054 0x0C | SD_ASYNC_FIFO_RST,
1055 SD_30_MODE | SD_ASYNC_FIFO_RST);
1056 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1057 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1058 break;
1059
1060 case MMC_TIMING_UHS_DDR50:
1061 *ddr_mode = true;
1062
1063 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1064 0x0C | SD_ASYNC_FIFO_RST,
1065 SD_DDR_MODE | SD_ASYNC_FIFO_RST);
1066 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1067 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1068 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1069 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1070 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1071 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1072 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1073 break;
1074
1075 case MMC_TIMING_MMC_HS:
1076 case MMC_TIMING_SD_HS:
1077 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1078 0x0C, SD_20_MODE);
1079 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1080 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1081 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1082 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1083 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1084 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1085 break;
1086
1087 default:
1088 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1089 SD_CFG1, 0x0C, SD_20_MODE);
1090 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1091 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1092 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1093 SD_PUSH_POINT_CTL, 0xFF, 0);
1094 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1095 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1096 break;
1097 }
1098
1099 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
1100 }
1101
sdmmc_set_ios(struct mmc_host * mmc,struct mmc_ios * ios)1102 static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1103 {
1104 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1105 struct rtsx_ucr *ucr = host->ucr;
1106
1107 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1108 mutex_lock(&ucr->dev_mutex);
1109
1110 sd_set_power_mode(host, ios->power_mode);
1111 sd_set_bus_width(host, ios->bus_width);
1112 sd_set_timing(host, ios->timing, &host->ddr_mode);
1113
1114 host->vpclk = false;
1115 host->double_clk = true;
1116
1117 switch (ios->timing) {
1118 case MMC_TIMING_UHS_SDR104:
1119 case MMC_TIMING_UHS_SDR50:
1120 host->ssc_depth = SSC_DEPTH_2M;
1121 host->vpclk = true;
1122 host->double_clk = false;
1123 break;
1124 case MMC_TIMING_UHS_DDR50:
1125 case MMC_TIMING_UHS_SDR25:
1126 host->ssc_depth = SSC_DEPTH_1M;
1127 break;
1128 default:
1129 host->ssc_depth = SSC_DEPTH_512K;
1130 break;
1131 }
1132
1133 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1134 host->clock = ios->clock;
1135
1136 rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
1137 host->initial_mode, host->double_clk, host->vpclk);
1138
1139 mutex_unlock(&ucr->dev_mutex);
1140 dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
1141 }
1142
sdmmc_switch_voltage(struct mmc_host * mmc,struct mmc_ios * ios)1143 static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1144 {
1145 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1146 struct rtsx_ucr *ucr = host->ucr;
1147 int err = 0;
1148
1149 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1150 __func__, ios->signal_voltage);
1151
1152 if (host->host_removal)
1153 return -ENOMEDIUM;
1154
1155 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
1156 return -EPERM;
1157
1158 mutex_lock(&ucr->dev_mutex);
1159
1160 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
1161 if (err) {
1162 mutex_unlock(&ucr->dev_mutex);
1163 return err;
1164 }
1165
1166 /* Let mmc core do the busy checking, simply stop the forced-toggle
1167 * clock(while issuing CMD11) and switch voltage.
1168 */
1169 rtsx_usb_init_cmd(ucr);
1170
1171 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1172 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1173 SD_IO_USING_1V8, SD_IO_USING_3V3);
1174 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1175 TUNE_SD18_MASK, TUNE_SD18_3V3);
1176 } else {
1177 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
1178 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1179 SD_CLK_FORCE_STOP);
1180 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1181 SD_IO_USING_1V8, SD_IO_USING_1V8);
1182 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1183 TUNE_SD18_MASK, TUNE_SD18_1V8);
1184 }
1185
1186 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1187 mutex_unlock(&ucr->dev_mutex);
1188
1189 return err;
1190 }
1191
sdmmc_card_busy(struct mmc_host * mmc)1192 static int sdmmc_card_busy(struct mmc_host *mmc)
1193 {
1194 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1195 struct rtsx_ucr *ucr = host->ucr;
1196 int err;
1197 u8 stat;
1198 u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
1199 | SD_DAT0_STATUS;
1200
1201 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1202
1203 mutex_lock(&ucr->dev_mutex);
1204
1205 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1206 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1207 SD_CLK_TOGGLE_EN);
1208 if (err)
1209 goto out;
1210
1211 mdelay(1);
1212
1213 err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
1214 if (err)
1215 goto out;
1216
1217 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1218 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1219 out:
1220 mutex_unlock(&ucr->dev_mutex);
1221
1222 if (err)
1223 return err;
1224
1225 /* check if any pin between dat[0:3] is low */
1226 if ((stat & mask) != mask)
1227 return 1;
1228 else
1229 return 0;
1230 }
1231
sdmmc_execute_tuning(struct mmc_host * mmc,u32 opcode)1232 static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1233 {
1234 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1235 struct rtsx_ucr *ucr = host->ucr;
1236 int err = 0;
1237
1238 if (host->host_removal)
1239 return -ENOMEDIUM;
1240
1241 mutex_lock(&ucr->dev_mutex);
1242
1243 if (!host->ddr_mode)
1244 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
1245
1246 mutex_unlock(&ucr->dev_mutex);
1247
1248 return err;
1249 }
1250
1251 static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
1252 .request = sdmmc_request,
1253 .set_ios = sdmmc_set_ios,
1254 .get_ro = sdmmc_get_ro,
1255 .get_cd = sdmmc_get_cd,
1256 .start_signal_voltage_switch = sdmmc_switch_voltage,
1257 .card_busy = sdmmc_card_busy,
1258 .execute_tuning = sdmmc_execute_tuning,
1259 };
1260
1261 #ifdef RTSX_USB_USE_LEDS_CLASS
rtsx_usb_led_control(struct led_classdev * led,enum led_brightness brightness)1262 static void rtsx_usb_led_control(struct led_classdev *led,
1263 enum led_brightness brightness)
1264 {
1265 struct rtsx_usb_sdmmc *host = container_of(led,
1266 struct rtsx_usb_sdmmc, led);
1267
1268 if (host->host_removal)
1269 return;
1270
1271 host->led.brightness = brightness;
1272 schedule_work(&host->led_work);
1273 }
1274
rtsx_usb_update_led(struct work_struct * work)1275 static void rtsx_usb_update_led(struct work_struct *work)
1276 {
1277 struct rtsx_usb_sdmmc *host =
1278 container_of(work, struct rtsx_usb_sdmmc, led_work);
1279 struct rtsx_ucr *ucr = host->ucr;
1280
1281 pm_runtime_get_noresume(sdmmc_dev(host));
1282 mutex_lock(&ucr->dev_mutex);
1283
1284 if (host->power_mode == MMC_POWER_OFF)
1285 goto out;
1286
1287 if (host->led.brightness == LED_OFF)
1288 rtsx_usb_turn_off_led(ucr);
1289 else
1290 rtsx_usb_turn_on_led(ucr);
1291
1292 out:
1293 mutex_unlock(&ucr->dev_mutex);
1294 pm_runtime_put_sync_suspend(sdmmc_dev(host));
1295 }
1296 #endif
1297
rtsx_usb_init_host(struct rtsx_usb_sdmmc * host)1298 static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
1299 {
1300 struct mmc_host *mmc = host->mmc;
1301
1302 mmc->f_min = 250000;
1303 mmc->f_max = 208000000;
1304 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1305 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1306 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1307 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
1308 MMC_CAP_SYNC_RUNTIME_PM;
1309 mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
1310 MMC_CAP2_NO_SDIO;
1311
1312 mmc->max_current_330 = 400;
1313 mmc->max_current_180 = 800;
1314 mmc->ops = &rtsx_usb_sdmmc_ops;
1315 mmc->max_segs = 256;
1316 mmc->max_seg_size = 65536;
1317 mmc->max_blk_size = 512;
1318 mmc->max_blk_count = 65535;
1319 mmc->max_req_size = 524288;
1320
1321 host->power_mode = MMC_POWER_OFF;
1322 }
1323
rtsx_usb_sdmmc_drv_probe(struct platform_device * pdev)1324 static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
1325 {
1326 struct mmc_host *mmc;
1327 struct rtsx_usb_sdmmc *host;
1328 struct rtsx_ucr *ucr;
1329 #ifdef RTSX_USB_USE_LEDS_CLASS
1330 int err;
1331 #endif
1332 int ret;
1333
1334 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
1335 if (!ucr)
1336 return -ENXIO;
1337
1338 dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
1339
1340 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1341 if (!mmc)
1342 return -ENOMEM;
1343
1344 host = mmc_priv(mmc);
1345 host->ucr = ucr;
1346 host->mmc = mmc;
1347 host->pdev = pdev;
1348 platform_set_drvdata(pdev, host);
1349
1350 mutex_init(&host->host_mutex);
1351 rtsx_usb_init_host(host);
1352 pm_runtime_enable(&pdev->dev);
1353
1354 #ifdef RTSX_USB_USE_LEDS_CLASS
1355 snprintf(host->led_name, sizeof(host->led_name),
1356 "%s::", mmc_hostname(mmc));
1357 host->led.name = host->led_name;
1358 host->led.brightness = LED_OFF;
1359 host->led.default_trigger = mmc_hostname(mmc);
1360 host->led.brightness_set = rtsx_usb_led_control;
1361
1362 err = led_classdev_register(mmc_dev(mmc), &host->led);
1363 if (err)
1364 dev_err(&(pdev->dev),
1365 "Failed to register LED device: %d\n", err);
1366 INIT_WORK(&host->led_work, rtsx_usb_update_led);
1367
1368 #endif
1369 ret = mmc_add_host(mmc);
1370 if (ret) {
1371 #ifdef RTSX_USB_USE_LEDS_CLASS
1372 led_classdev_unregister(&host->led);
1373 #endif
1374 mmc_free_host(mmc);
1375 pm_runtime_disable(&pdev->dev);
1376 return ret;
1377 }
1378
1379 return 0;
1380 }
1381
rtsx_usb_sdmmc_drv_remove(struct platform_device * pdev)1382 static void rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
1383 {
1384 struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
1385 struct mmc_host *mmc;
1386
1387 if (!host)
1388 return;
1389
1390 mmc = host->mmc;
1391 host->host_removal = true;
1392
1393 mutex_lock(&host->host_mutex);
1394 if (host->mrq) {
1395 dev_dbg(&(pdev->dev),
1396 "%s: Controller removed during transfer\n",
1397 mmc_hostname(mmc));
1398 host->mrq->cmd->error = -ENOMEDIUM;
1399 if (host->mrq->stop)
1400 host->mrq->stop->error = -ENOMEDIUM;
1401 mmc_request_done(mmc, host->mrq);
1402 }
1403 mutex_unlock(&host->host_mutex);
1404
1405 mmc_remove_host(mmc);
1406
1407 #ifdef RTSX_USB_USE_LEDS_CLASS
1408 cancel_work_sync(&host->led_work);
1409 led_classdev_unregister(&host->led);
1410 #endif
1411
1412 mmc_free_host(mmc);
1413 pm_runtime_disable(&pdev->dev);
1414 platform_set_drvdata(pdev, NULL);
1415
1416 dev_dbg(&(pdev->dev),
1417 ": Realtek USB SD/MMC module has been removed\n");
1418 }
1419
1420 #ifdef CONFIG_PM
rtsx_usb_sdmmc_runtime_suspend(struct device * dev)1421 static int rtsx_usb_sdmmc_runtime_suspend(struct device *dev)
1422 {
1423 struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1424
1425 host->mmc->caps &= ~MMC_CAP_NEEDS_POLL;
1426 return 0;
1427 }
1428
rtsx_usb_sdmmc_runtime_resume(struct device * dev)1429 static int rtsx_usb_sdmmc_runtime_resume(struct device *dev)
1430 {
1431 struct rtsx_usb_sdmmc *host = dev_get_drvdata(dev);
1432
1433 host->mmc->caps |= MMC_CAP_NEEDS_POLL;
1434 if (sdmmc_get_cd(host->mmc) == 1)
1435 mmc_detect_change(host->mmc, 0);
1436 return 0;
1437 }
1438 #endif
1439
1440 static const struct dev_pm_ops rtsx_usb_sdmmc_dev_pm_ops = {
1441 SET_RUNTIME_PM_OPS(rtsx_usb_sdmmc_runtime_suspend,
1442 rtsx_usb_sdmmc_runtime_resume, NULL)
1443 };
1444
1445 static const struct platform_device_id rtsx_usb_sdmmc_ids[] = {
1446 {
1447 .name = "rtsx_usb_sdmmc",
1448 }, {
1449 /* sentinel */
1450 }
1451 };
1452 MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
1453
1454 static struct platform_driver rtsx_usb_sdmmc_driver = {
1455 .probe = rtsx_usb_sdmmc_drv_probe,
1456 .remove_new = rtsx_usb_sdmmc_drv_remove,
1457 .id_table = rtsx_usb_sdmmc_ids,
1458 .driver = {
1459 .name = "rtsx_usb_sdmmc",
1460 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1461 .pm = &rtsx_usb_sdmmc_dev_pm_ops,
1462 },
1463 };
1464 module_platform_driver(rtsx_usb_sdmmc_driver);
1465
1466 MODULE_LICENSE("GPL v2");
1467 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
1468 MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
1469