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Nobuhiro Iwamatsu72d42ba2014-12-17 08:03:00 +09001/*
2 * drivers/mmc/sh_sdhi.c
3 *
4 * SD/MMC driver for Renesas rmobile ARM SoCs.
5 *
6 * Copyright (C) 2011,2013-2014 Renesas Electronics Corporation
7 * Copyright (C) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
8 * Copyright (C) 2008-2009 Renesas Solutions Corp.
9 *
10 * SPDX-License-Identifier: GPL-2.0
11 */
12
13#include <common.h>
14#include <malloc.h>
15#include <mmc.h>
16#include <asm/errno.h>
17#include <asm/io.h>
18#include <asm/arch/rmobile.h>
19#include <asm/arch/sh_sdhi.h>
20
21#define DRIVER_NAME "sh-sdhi"
22
23struct sh_sdhi_host {
24 unsigned long addr;
25 int ch;
26 int bus_shift;
27 unsigned long quirks;
28 unsigned char wait_int;
29 unsigned char sd_error;
30 unsigned char detect_waiting;
31};
32static inline void sh_sdhi_writew(struct sh_sdhi_host *host, int reg, u16 val)
33{
34 writew(val, host->addr + (reg << host->bus_shift));
35}
36
37static inline u16 sh_sdhi_readw(struct sh_sdhi_host *host, int reg)
38{
39 return readw(host->addr + (reg << host->bus_shift));
40}
41
42static void *mmc_priv(struct mmc *mmc)
43{
44 return (void *)mmc->priv;
45}
46
47static void sh_sdhi_detect(struct sh_sdhi_host *host)
48{
49 sh_sdhi_writew(host, SDHI_OPTION,
50 OPT_BUS_WIDTH_1 | sh_sdhi_readw(host, SDHI_OPTION));
51
52 host->detect_waiting = 0;
53}
54
55static int sh_sdhi_intr(void *dev_id)
56{
57 struct sh_sdhi_host *host = dev_id;
58 int state1 = 0, state2 = 0;
59
60 state1 = sh_sdhi_readw(host, SDHI_INFO1);
61 state2 = sh_sdhi_readw(host, SDHI_INFO2);
62
63 debug("%s: state1 = %x, state2 = %x\n", __func__, state1, state2);
64
65 /* CARD Insert */
66 if (state1 & INFO1_CARD_IN) {
67 sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_IN);
68 if (!host->detect_waiting) {
69 host->detect_waiting = 1;
70 sh_sdhi_detect(host);
71 }
72 sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
73 INFO1M_ACCESS_END | INFO1M_CARD_IN |
74 INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
75 return -EAGAIN;
76 }
77 /* CARD Removal */
78 if (state1 & INFO1_CARD_RE) {
79 sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_RE);
80 if (!host->detect_waiting) {
81 host->detect_waiting = 1;
82 sh_sdhi_detect(host);
83 }
84 sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
85 INFO1M_ACCESS_END | INFO1M_CARD_RE |
86 INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
87 sh_sdhi_writew(host, SDHI_SDIO_INFO1_MASK, SDIO_INFO1M_ON);
88 sh_sdhi_writew(host, SDHI_SDIO_MODE, SDIO_MODE_OFF);
89 return -EAGAIN;
90 }
91
92 if (state2 & INFO2_ALL_ERR) {
93 sh_sdhi_writew(host, SDHI_INFO2,
94 (unsigned short)~(INFO2_ALL_ERR));
95 sh_sdhi_writew(host, SDHI_INFO2_MASK,
96 INFO2M_ALL_ERR |
97 sh_sdhi_readw(host, SDHI_INFO2_MASK));
98 host->sd_error = 1;
99 host->wait_int = 1;
100 return 0;
101 }
102 /* Respons End */
103 if (state1 & INFO1_RESP_END) {
104 sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_RESP_END);
105 sh_sdhi_writew(host, SDHI_INFO1_MASK,
106 INFO1M_RESP_END |
107 sh_sdhi_readw(host, SDHI_INFO1_MASK));
108 host->wait_int = 1;
109 return 0;
110 }
111 /* SD_BUF Read Enable */
112 if (state2 & INFO2_BRE_ENABLE) {
113 sh_sdhi_writew(host, SDHI_INFO2, ~INFO2_BRE_ENABLE);
114 sh_sdhi_writew(host, SDHI_INFO2_MASK,
115 INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ |
116 sh_sdhi_readw(host, SDHI_INFO2_MASK));
117 host->wait_int = 1;
118 return 0;
119 }
120 /* SD_BUF Write Enable */
121 if (state2 & INFO2_BWE_ENABLE) {
122 sh_sdhi_writew(host, SDHI_INFO2, ~INFO2_BWE_ENABLE);
123 sh_sdhi_writew(host, SDHI_INFO2_MASK,
124 INFO2_BWE_ENABLE | INFO2M_BUF_ILL_WRITE |
125 sh_sdhi_readw(host, SDHI_INFO2_MASK));
126 host->wait_int = 1;
127 return 0;
128 }
129 /* Access End */
130 if (state1 & INFO1_ACCESS_END) {
131 sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_ACCESS_END);
132 sh_sdhi_writew(host, SDHI_INFO1_MASK,
133 INFO1_ACCESS_END |
134 sh_sdhi_readw(host, SDHI_INFO1_MASK));
135 host->wait_int = 1;
136 return 0;
137 }
138 return -EAGAIN;
139}
140
141static int sh_sdhi_wait_interrupt_flag(struct sh_sdhi_host *host)
142{
143 int timeout = 10000000;
144
145 while (1) {
146 timeout--;
147 if (timeout < 0) {
148 debug(DRIVER_NAME": %s timeout\n", __func__);
149 return 0;
150 }
151
152 if (!sh_sdhi_intr(host))
153 break;
154
155 udelay(1); /* 1 usec */
156 }
157
158 return 1; /* Return value: NOT 0 = complete waiting */
159}
160
161static int sh_sdhi_clock_control(struct sh_sdhi_host *host, unsigned long clk)
162{
163 u32 clkdiv, i, timeout;
164
165 if (sh_sdhi_readw(host, SDHI_INFO2) & (1 << 14)) {
166 printf(DRIVER_NAME": Busy state ! Cannot change the clock\n");
167 return -EBUSY;
168 }
169
170 sh_sdhi_writew(host, SDHI_CLK_CTRL,
171 ~CLK_ENABLE & sh_sdhi_readw(host, SDHI_CLK_CTRL));
172
173 if (clk == 0)
174 return -EIO;
175
176 clkdiv = 0x80;
177 i = CONFIG_SH_SDHI_FREQ >> (0x8 + 1);
178 for (; clkdiv && clk >= (i << 1); (clkdiv >>= 1))
179 i <<= 1;
180
181 sh_sdhi_writew(host, SDHI_CLK_CTRL, clkdiv);
182
183 timeout = 100000;
184 /* Waiting for SD Bus busy to be cleared */
185 while (timeout--) {
186 if ((sh_sdhi_readw(host, SDHI_INFO2) & 0x2000))
187 break;
188 }
189
190 if (timeout)
191 sh_sdhi_writew(host, SDHI_CLK_CTRL,
192 CLK_ENABLE | sh_sdhi_readw(host, SDHI_CLK_CTRL));
193 else
194 return -EBUSY;
195
196 return 0;
197}
198
199static int sh_sdhi_sync_reset(struct sh_sdhi_host *host)
200{
201 u32 timeout;
202 sh_sdhi_writew(host, SDHI_SOFT_RST, SOFT_RST_ON);
203 sh_sdhi_writew(host, SDHI_SOFT_RST, SOFT_RST_OFF);
204 sh_sdhi_writew(host, SDHI_CLK_CTRL,
205 CLK_ENABLE | sh_sdhi_readw(host, SDHI_CLK_CTRL));
206
207 timeout = 100000;
208 while (timeout--) {
209 if (!(sh_sdhi_readw(host, SDHI_INFO2) & INFO2_CBUSY))
210 break;
211 udelay(100);
212 }
213
214 if (!timeout)
215 return -EBUSY;
216
217 if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
218 sh_sdhi_writew(host, SDHI_HOST_MODE, 1);
219
220 return 0;
221}
222
223static int sh_sdhi_error_manage(struct sh_sdhi_host *host)
224{
225 unsigned short e_state1, e_state2;
226 int ret;
227
228 host->sd_error = 0;
229 host->wait_int = 0;
230
231 e_state1 = sh_sdhi_readw(host, SDHI_ERR_STS1);
232 e_state2 = sh_sdhi_readw(host, SDHI_ERR_STS2);
233 if (e_state2 & ERR_STS2_SYS_ERROR) {
234 if (e_state2 & ERR_STS2_RES_STOP_TIMEOUT)
235 ret = TIMEOUT;
236 else
237 ret = -EILSEQ;
238 debug("%s: ERR_STS2 = %04x\n",
239 DRIVER_NAME, sh_sdhi_readw(host, SDHI_ERR_STS2));
240 sh_sdhi_sync_reset(host);
241
242 sh_sdhi_writew(host, SDHI_INFO1_MASK,
243 INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
244 return ret;
245 }
246 if (e_state1 & ERR_STS1_CRC_ERROR || e_state1 & ERR_STS1_CMD_ERROR)
247 ret = -EILSEQ;
248 else
249 ret = TIMEOUT;
250
251 debug("%s: ERR_STS1 = %04x\n",
252 DRIVER_NAME, sh_sdhi_readw(host, SDHI_ERR_STS1));
253 sh_sdhi_sync_reset(host);
254 sh_sdhi_writew(host, SDHI_INFO1_MASK,
255 INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
256 return ret;
257}
258
259static int sh_sdhi_single_read(struct sh_sdhi_host *host, struct mmc_data *data)
260{
261 long time;
262 unsigned short blocksize, i;
263 unsigned short *p = (unsigned short *)data->dest;
264
265 if ((unsigned long)p & 0x00000001) {
266 debug(DRIVER_NAME": %s: The data pointer is unaligned.",
267 __func__);
268 return -EIO;
269 }
270
271 host->wait_int = 0;
272 sh_sdhi_writew(host, SDHI_INFO2_MASK,
273 ~(INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ) &
274 sh_sdhi_readw(host, SDHI_INFO2_MASK));
275 sh_sdhi_writew(host, SDHI_INFO1_MASK,
276 ~INFO1M_ACCESS_END &
277 sh_sdhi_readw(host, SDHI_INFO1_MASK));
278 time = sh_sdhi_wait_interrupt_flag(host);
279 if (time == 0 || host->sd_error != 0)
280 return sh_sdhi_error_manage(host);
281
282 host->wait_int = 0;
283 blocksize = sh_sdhi_readw(host, SDHI_SIZE);
284 for (i = 0; i < blocksize / 2; i++)
285 *p++ = sh_sdhi_readw(host, SDHI_BUF0);
286
287 time = sh_sdhi_wait_interrupt_flag(host);
288 if (time == 0 || host->sd_error != 0)
289 return sh_sdhi_error_manage(host);
290
291 host->wait_int = 0;
292 return 0;
293}
294
295static int sh_sdhi_multi_read(struct sh_sdhi_host *host, struct mmc_data *data)
296{
297 long time;
298 unsigned short blocksize, i, sec;
299 unsigned short *p = (unsigned short *)data->dest;
300
301 if ((unsigned long)p & 0x00000001) {
302 debug(DRIVER_NAME": %s: The data pointer is unaligned.",
303 __func__);
304 return -EIO;
305 }
306
307 debug("%s: blocks = %d, blocksize = %d\n",
308 __func__, data->blocks, data->blocksize);
309
310 host->wait_int = 0;
311 for (sec = 0; sec < data->blocks; sec++) {
312 sh_sdhi_writew(host, SDHI_INFO2_MASK,
313 ~(INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ) &
314 sh_sdhi_readw(host, SDHI_INFO2_MASK));
315
316 time = sh_sdhi_wait_interrupt_flag(host);
317 if (time == 0 || host->sd_error != 0)
318 return sh_sdhi_error_manage(host);
319
320 host->wait_int = 0;
321 blocksize = sh_sdhi_readw(host, SDHI_SIZE);
322 for (i = 0; i < blocksize / 2; i++)
323 *p++ = sh_sdhi_readw(host, SDHI_BUF0);
324 }
325
326 return 0;
327}
328
329static int sh_sdhi_single_write(struct sh_sdhi_host *host,
330 struct mmc_data *data)
331{
332 long time;
333 unsigned short blocksize, i;
334 const unsigned short *p = (const unsigned short *)data->src;
335
336 if ((unsigned long)p & 0x00000001) {
337 debug(DRIVER_NAME": %s: The data pointer is unaligned.",
338 __func__);
339 return -EIO;
340 }
341
342 debug("%s: blocks = %d, blocksize = %d\n",
343 __func__, data->blocks, data->blocksize);
344
345 host->wait_int = 0;
346 sh_sdhi_writew(host, SDHI_INFO2_MASK,
347 ~(INFO2M_BWE_ENABLE | INFO2M_BUF_ILL_WRITE) &
348 sh_sdhi_readw(host, SDHI_INFO2_MASK));
349 sh_sdhi_writew(host, SDHI_INFO1_MASK,
350 ~INFO1M_ACCESS_END &
351 sh_sdhi_readw(host, SDHI_INFO1_MASK));
352
353 time = sh_sdhi_wait_interrupt_flag(host);
354 if (time == 0 || host->sd_error != 0)
355 return sh_sdhi_error_manage(host);
356
357 host->wait_int = 0;
358 blocksize = sh_sdhi_readw(host, SDHI_SIZE);
359 for (i = 0; i < blocksize / 2; i++)
360 sh_sdhi_writew(host, SDHI_BUF0, *p++);
361
362 time = sh_sdhi_wait_interrupt_flag(host);
363 if (time == 0 || host->sd_error != 0)
364 return sh_sdhi_error_manage(host);
365
366 host->wait_int = 0;
367 return 0;
368}
369
370static int sh_sdhi_multi_write(struct sh_sdhi_host *host, struct mmc_data *data)
371{
372 long time;
373 unsigned short i, sec, blocksize;
374 const unsigned short *p = (const unsigned short *)data->src;
375
376 debug("%s: blocks = %d, blocksize = %d\n",
377 __func__, data->blocks, data->blocksize);
378
379 host->wait_int = 0;
380 for (sec = 0; sec < data->blocks; sec++) {
381 sh_sdhi_writew(host, SDHI_INFO2_MASK,
382 ~(INFO2M_BWE_ENABLE | INFO2M_BUF_ILL_WRITE) &
383 sh_sdhi_readw(host, SDHI_INFO2_MASK));
384
385 time = sh_sdhi_wait_interrupt_flag(host);
386 if (time == 0 || host->sd_error != 0)
387 return sh_sdhi_error_manage(host);
388
389 host->wait_int = 0;
390 blocksize = sh_sdhi_readw(host, SDHI_SIZE);
391 for (i = 0; i < blocksize / 2; i++)
392 sh_sdhi_writew(host, SDHI_BUF0, *p++);
393 }
394
395 return 0;
396}
397
398static void sh_sdhi_get_response(struct sh_sdhi_host *host, struct mmc_cmd *cmd)
399{
400 unsigned short i, j, cnt = 1;
401 unsigned short resp[8];
402 unsigned long *p1, *p2;
403
404 if (cmd->resp_type & MMC_RSP_136) {
405 cnt = 4;
406 resp[0] = sh_sdhi_readw(host, SDHI_RSP00);
407 resp[1] = sh_sdhi_readw(host, SDHI_RSP01);
408 resp[2] = sh_sdhi_readw(host, SDHI_RSP02);
409 resp[3] = sh_sdhi_readw(host, SDHI_RSP03);
410 resp[4] = sh_sdhi_readw(host, SDHI_RSP04);
411 resp[5] = sh_sdhi_readw(host, SDHI_RSP05);
412 resp[6] = sh_sdhi_readw(host, SDHI_RSP06);
413 resp[7] = sh_sdhi_readw(host, SDHI_RSP07);
414
415 /* SDHI REGISTER SPECIFICATION */
416 for (i = 7, j = 6; i > 0; i--) {
417 resp[i] = (resp[i] << 8) & 0xff00;
418 resp[i] |= (resp[j--] >> 8) & 0x00ff;
419 }
420 resp[0] = (resp[0] << 8) & 0xff00;
421
422 /* SDHI REGISTER SPECIFICATION */
423 p1 = ((unsigned long *)resp) + 3;
424
425 } else {
426 resp[0] = sh_sdhi_readw(host, SDHI_RSP00);
427 resp[1] = sh_sdhi_readw(host, SDHI_RSP01);
428
429 p1 = ((unsigned long *)resp);
430 }
431
432 p2 = (unsigned long *)cmd->response;
433#if defined(__BIG_ENDIAN_BITFIELD)
434 for (i = 0; i < cnt; i++) {
435 *p2++ = ((*p1 >> 16) & 0x0000ffff) |
436 ((*p1 << 16) & 0xffff0000);
437 p1--;
438 }
439#else
440 for (i = 0; i < cnt; i++)
441 *p2++ = *p1--;
442#endif /* __BIG_ENDIAN_BITFIELD */
443}
444
445static unsigned short sh_sdhi_set_cmd(struct sh_sdhi_host *host,
446 struct mmc_data *data, unsigned short opc)
447{
448 switch (opc) {
449 case SD_CMD_APP_SEND_OP_COND:
450 case SD_CMD_APP_SEND_SCR:
451 opc |= SDHI_APP;
452 break;
453 case SD_CMD_APP_SET_BUS_WIDTH:
454 /* SD_APP_SET_BUS_WIDTH*/
455 if (!data)
456 opc |= SDHI_APP;
457 else /* SD_SWITCH */
458 opc = SDHI_SD_SWITCH;
459 break;
460 default:
461 break;
462 }
463 return opc;
464}
465
466static unsigned short sh_sdhi_data_trans(struct sh_sdhi_host *host,
467 struct mmc_data *data, unsigned short opc)
468{
469 unsigned short ret;
470
471 switch (opc) {
472 case MMC_CMD_READ_MULTIPLE_BLOCK:
473 ret = sh_sdhi_multi_read(host, data);
474 break;
475 case MMC_CMD_WRITE_MULTIPLE_BLOCK:
476 ret = sh_sdhi_multi_write(host, data);
477 break;
478 case MMC_CMD_WRITE_SINGLE_BLOCK:
479 ret = sh_sdhi_single_write(host, data);
480 break;
481 case MMC_CMD_READ_SINGLE_BLOCK:
482 case SDHI_SD_APP_SEND_SCR:
483 case SDHI_SD_SWITCH: /* SD_SWITCH */
484 ret = sh_sdhi_single_read(host, data);
485 break;
486 default:
487 printf(DRIVER_NAME": SD: NOT SUPPORT CMD = d'%04d\n", opc);
488 ret = -EINVAL;
489 break;
490 }
491 return ret;
492}
493
494static int sh_sdhi_start_cmd(struct sh_sdhi_host *host,
495 struct mmc_data *data, struct mmc_cmd *cmd)
496{
497 long time;
498 unsigned short opc = cmd->cmdidx;
499 int ret = 0;
500 unsigned long timeout;
501
502 debug("opc = %d, arg = %x, resp_type = %x\n",
503 opc, cmd->cmdarg, cmd->resp_type);
504
505 if (opc == MMC_CMD_STOP_TRANSMISSION) {
506 /* SDHI sends the STOP command automatically by STOP reg */
507 sh_sdhi_writew(host, SDHI_INFO1_MASK, ~INFO1M_ACCESS_END &
508 sh_sdhi_readw(host, SDHI_INFO1_MASK));
509
510 time = sh_sdhi_wait_interrupt_flag(host);
511 if (time == 0 || host->sd_error != 0)
512 return sh_sdhi_error_manage(host);
513
514 sh_sdhi_get_response(host, cmd);
515 return 0;
516 }
517
518 if (data) {
519 if ((opc == MMC_CMD_READ_MULTIPLE_BLOCK) ||
520 opc == MMC_CMD_WRITE_MULTIPLE_BLOCK) {
521 sh_sdhi_writew(host, SDHI_STOP, STOP_SEC_ENABLE);
522 sh_sdhi_writew(host, SDHI_SECCNT, data->blocks);
523 }
524 sh_sdhi_writew(host, SDHI_SIZE, data->blocksize);
525 }
526 opc = sh_sdhi_set_cmd(host, data, opc);
527
528 /*
Bin Menga1875592016-02-05 19:30:11 -0800529 * U-Boot cannot use interrupt.
Nobuhiro Iwamatsu72d42ba2014-12-17 08:03:00 +0900530 * So this flag may not be clear by timing
531 */
532 sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_RESP_END);
533
534 sh_sdhi_writew(host, SDHI_INFO1_MASK,
535 INFO1M_RESP_END | sh_sdhi_readw(host, SDHI_INFO1_MASK));
536 sh_sdhi_writew(host, SDHI_ARG0,
537 (unsigned short)(cmd->cmdarg & ARG0_MASK));
538 sh_sdhi_writew(host, SDHI_ARG1,
539 (unsigned short)((cmd->cmdarg >> 16) & ARG1_MASK));
540
541 timeout = 100000;
542 /* Waiting for SD Bus busy to be cleared */
543 while (timeout--) {
544 if ((sh_sdhi_readw(host, SDHI_INFO2) & 0x2000))
545 break;
546 }
547
548 sh_sdhi_writew(host, SDHI_CMD, (unsigned short)(opc & CMD_MASK));
549
550 host->wait_int = 0;
551 sh_sdhi_writew(host, SDHI_INFO1_MASK,
552 ~INFO1M_RESP_END & sh_sdhi_readw(host, SDHI_INFO1_MASK));
553 sh_sdhi_writew(host, SDHI_INFO2_MASK,
554 ~(INFO2M_CMD_ERROR | INFO2M_CRC_ERROR |
555 INFO2M_END_ERROR | INFO2M_TIMEOUT |
556 INFO2M_RESP_TIMEOUT | INFO2M_ILA) &
557 sh_sdhi_readw(host, SDHI_INFO2_MASK));
558
559 time = sh_sdhi_wait_interrupt_flag(host);
560 if (!time)
561 return sh_sdhi_error_manage(host);
562
563 if (host->sd_error) {
564 switch (cmd->cmdidx) {
565 case MMC_CMD_ALL_SEND_CID:
566 case MMC_CMD_SELECT_CARD:
567 case SD_CMD_SEND_IF_COND:
568 case MMC_CMD_APP_CMD:
569 ret = TIMEOUT;
570 break;
571 default:
572 debug(DRIVER_NAME": Cmd(d'%d) err\n", opc);
573 debug(DRIVER_NAME": cmdidx = %d\n", cmd->cmdidx);
574 ret = sh_sdhi_error_manage(host);
575 break;
576 }
577 host->sd_error = 0;
578 host->wait_int = 0;
579 return ret;
580 }
581 if (sh_sdhi_readw(host, SDHI_INFO1) & INFO1_RESP_END)
582 return -EINVAL;
583
584 if (host->wait_int) {
585 sh_sdhi_get_response(host, cmd);
586 host->wait_int = 0;
587 }
588 if (data)
589 ret = sh_sdhi_data_trans(host, data, opc);
590
591 debug("ret = %d, resp = %08x, %08x, %08x, %08x\n",
592 ret, cmd->response[0], cmd->response[1],
593 cmd->response[2], cmd->response[3]);
594 return ret;
595}
596
597static int sh_sdhi_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
598 struct mmc_data *data)
599{
600 struct sh_sdhi_host *host = mmc_priv(mmc);
601 int ret;
602
603 host->sd_error = 0;
604
605 ret = sh_sdhi_start_cmd(host, data, cmd);
606
607 return ret;
608}
609
610static void sh_sdhi_set_ios(struct mmc *mmc)
611{
612 int ret;
613 struct sh_sdhi_host *host = mmc_priv(mmc);
614
615 ret = sh_sdhi_clock_control(host, mmc->clock);
616 if (ret)
617 return;
618
619 if (mmc->bus_width == 4)
620 sh_sdhi_writew(host, SDHI_OPTION, ~OPT_BUS_WIDTH_1 &
621 sh_sdhi_readw(host, SDHI_OPTION));
622 else
623 sh_sdhi_writew(host, SDHI_OPTION, OPT_BUS_WIDTH_1 |
624 sh_sdhi_readw(host, SDHI_OPTION));
625
626 debug("clock = %d, buswidth = %d\n", mmc->clock, mmc->bus_width);
627}
628
629static int sh_sdhi_initialize(struct mmc *mmc)
630{
631 struct sh_sdhi_host *host = mmc_priv(mmc);
632 int ret = sh_sdhi_sync_reset(host);
633
634 sh_sdhi_writew(host, SDHI_PORTSEL, USE_1PORT);
635
636#if defined(__BIG_ENDIAN_BITFIELD)
637 sh_sdhi_writew(host, SDHI_EXT_SWAP, SET_SWAP);
638#endif
639
640 sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
641 INFO1M_ACCESS_END | INFO1M_CARD_RE |
642 INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
643
644 return ret;
645}
646
647static const struct mmc_ops sh_sdhi_ops = {
648 .send_cmd = sh_sdhi_send_cmd,
649 .set_ios = sh_sdhi_set_ios,
650 .init = sh_sdhi_initialize,
651};
652
653static struct mmc_config sh_sdhi_cfg = {
654 .name = DRIVER_NAME,
655 .ops = &sh_sdhi_ops,
656 .f_min = CLKDEV_INIT,
657 .f_max = CLKDEV_HS_DATA,
658 .voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
659 .host_caps = MMC_MODE_4BIT | MMC_MODE_HS,
660 .part_type = PART_TYPE_DOS,
661 .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
662};
663
664int sh_sdhi_init(unsigned long addr, int ch, unsigned long quirks)
665{
666 int ret = 0;
667 struct mmc *mmc;
668 struct sh_sdhi_host *host = NULL;
669
670 if (ch >= CONFIG_SYS_SH_SDHI_NR_CHANNEL)
671 return -ENODEV;
672
673 host = malloc(sizeof(struct sh_sdhi_host));
674 if (!host)
675 return -ENOMEM;
676
677 mmc = mmc_create(&sh_sdhi_cfg, host);
678 if (!mmc) {
679 ret = -1;
680 goto error;
681 }
682
683 host->ch = ch;
684 host->addr = addr;
685 host->quirks = quirks;
686
687 if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
688 host->bus_shift = 1;
689
690 return ret;
691error:
692 if (host)
693 free(host);
694 return ret;
695}