projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: rtsx: modify phase searching method for tuning
[linux-2.6-block.git] / drivers / mmc / host / rtsx_pci_sdmmc.c
CommitLineData
ff984e57
WW		 1/* Realtek PCI-Express SD/MMC Card Interface driver
2 *
62282180 3 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
ff984e57
WW		 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>
ff984e57
WW		 20 */
21
22#include <linux/module.h>
433e075c 23#include <linux/slab.h>
ff984e57
WW		 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
ff984e57
WW		 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;
d88691be
WW		 48 int power_state;
49#define SDMMC_POWER_ON 1
50#define SDMMC_POWER_OFF 0
ff984e57
WW		 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;
1b8055b4 219 bool clock_toggled = false;
ff984e57
WW		 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;
1b8055b4
WW		 263
264 clock_toggled = true;
ff984e57
WW		 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;
1b8055b4
WW		 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);
ff984e57
WW		 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;
71ef1ea4 357 int uhs = mmc_card_uhs(card);
ff984e57
WW		 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));
ff984e57
WW		 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
38d324df 407 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
ff984e57
WW		 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
84d72f9c
WW		 473static int sd_change_phase(struct realtek_pci_sdmmc *host,
474 u8 sample_point, bool rx)
ff984e57
WW		 475{
476 struct rtsx_pcr *pcr = host->pcr;
477 int err;
478
84d72f9c
WW		 479 dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
480 __func__, rx ? "RX" : "TX", sample_point);
ff984e57
WW		 481
482 rtsx_pci_init_cmd(pcr);
483
484 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
84d72f9c
WW		 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);
ff984e57
WW		 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
abcc6b29 504static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
ff984e57 505{
abcc6b29
MC		 506 bit %= RTSX_PHASE_MAX;
507 return phase_map & (1 << bit);
508}
ff984e57 509
abcc6b29
MC		 510static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
511{
512 int i;
ff984e57 513
abcc6b29
MC		 514 for (i = 0; i < RTSX_PHASE_MAX; i++) {
515 if (test_phase_bit(phase_map, start_bit + i) == 0)
516 return i;
ff984e57 517 }
abcc6b29
MC		 518 return RTSX_PHASE_MAX;
519}
ff984e57 520
abcc6b29
MC		 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;
ff984e57
WW		 530 }
531
abcc6b29
MC		 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;
ff984e57 537 }
abcc6b29 538 start += len ? len : 1;
ff984e57
WW		 539 }
540
abcc6b29
MC		 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
ff984e57
WW		 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
84d72f9c 568 err = sd_change_phase(host, sample_point, true);
ff984e57
WW		 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
abcc6b29 590 for (i = 0; i < RTSX_PHASE_MAX; i++) {
ff984e57
WW		 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
84d72f9c 630 err = sd_change_phase(host, final_phase, true);
ff984e57
WW		 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;
c3481955 647 int err;
ff984e57
WW		 648
649 if (host->eject) {
650 cmd->error = -ENOMEDIUM;
651 goto finish;
652 }
653
c3481955
WW		 654 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
655 if (err) {
656 cmd->error = err;
657 goto finish;
658 }
659
ff984e57
WW		 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
d88691be
WW		 734 if (host->power_state == SDMMC_POWER_ON)
735 return 0;
736
ff984e57
WW		 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
d88691be 759 host->power_state = SDMMC_POWER_ON;
ff984e57
WW		 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
d88691be
WW		 768 host->power_state = SDMMC_POWER_OFF;
769
ff984e57
WW		 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
84d72f9c 799static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
ff984e57
WW		 800{
801 struct rtsx_pcr *pcr = host->pcr;
802 int err = 0;
803
ff984e57
WW		 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:
ff984e57
WW		 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
c3481955
WW		 878 if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
879 return;
880
ff984e57
WW		 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);
84d72f9c 887 sd_set_timing(host, ios->timing);
ff984e57
WW		 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
ff984e57
WW		 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
c3481955
WW		 1053 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1054 if (err)
1055 return err;
1056
ff984e57
WW		 1057 mutex_lock(&pcr->pcr_mutex);
1058
1059 rtsx_pci_start_run(pcr);
1060
1061 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
ef85e736 1062 voltage = OUTPUT_3V3;
ff984e57 1063 else
ef85e736 1064 voltage = OUTPUT_1V8;
ff984e57 1065
ef85e736 1066 if (voltage == OUTPUT_1V8) {
ff984e57
WW		 1067 err = sd_wait_voltage_stable_1(host);
1068 if (err < 0)
1069 goto out;
1070 }
1071
ef85e736 1072 err = rtsx_pci_switch_output_voltage(pcr, voltage);
ff984e57
WW		 1073 if (err < 0)
1074 goto out;
1075
ef85e736 1076 if (voltage == OUTPUT_1V8) {
ff984e57
WW		 1077 err = sd_wait_voltage_stable_2(host);
1078 if (err < 0)
1079 goto out;
1080 }
1081
1b8055b4 1082out:
ff984e57
WW		 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
ff984e57
WW		 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
c3481955
WW		 1101 err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
1102 if (err)
1103 return err;
1104
ff984e57
WW		 1105 mutex_lock(&pcr->pcr_mutex);
1106
1107 rtsx_pci_start_run(pcr);
1108
84d72f9c
WW		 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 }
ff984e57 1126
84d72f9c
WW		 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:
ff984e57
WW		 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
ff984e57
WW		 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;
d88691be 1225 host->power_state = SDMMC_POWER_OFF;
ff984e57
WW		 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;
ff984e57
WW		 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);
640e09bc
MC		 1269 host->eject = true;
1270
ff984e57
WW		 1271 mmc_free_host(mmc);
1272
ff984e57
WW		 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,
ff984e57
WW		 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");
Linux 6.x block layer and io_uring tree(s)