2 * linux/drivers/mmc/core/sd.c
4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
5 * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
6 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/err.h>
14 #include <linux/slab.h>
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/mmc.h>
19 #include <linux/mmc/sd.h>
28 static const unsigned int tran_exp[] = {
29 10000, 100000, 1000000, 10000000,
33 static const unsigned char tran_mant[] = {
34 0, 10, 12, 13, 15, 20, 25, 30,
35 35, 40, 45, 50, 55, 60, 70, 80,
38 static const unsigned int tacc_exp[] = {
39 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
42 static const unsigned int tacc_mant[] = {
43 0, 10, 12, 13, 15, 20, 25, 30,
44 35, 40, 45, 50, 55, 60, 70, 80,
47 #define UNSTUFF_BITS(resp,start,size) \
49 const int __size = size; \
50 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
51 const int __off = 3 - ((start) / 32); \
52 const int __shft = (start) & 31; \
55 __res = resp[__off] >> __shft; \
56 if (__size + __shft > 32) \
57 __res |= resp[__off-1] << ((32 - __shft) % 32); \
62 * Given the decoded CSD structure, decode the raw CID to our CID structure.
64 void mmc_decode_cid(struct mmc_card *card)
66 u32 *resp = card->raw_cid;
68 memset(&card->cid, 0, sizeof(struct mmc_cid));
71 * SD doesn't currently have a version field so we will
72 * have to assume we can parse this.
74 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
75 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
76 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
77 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
78 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
79 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
80 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
81 card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
82 card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
83 card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
84 card->cid.year = UNSTUFF_BITS(resp, 12, 8);
85 card->cid.month = UNSTUFF_BITS(resp, 8, 4);
87 card->cid.year += 2000; /* SD cards year offset */
91 * Given a 128-bit response, decode to our card CSD structure.
93 static int mmc_decode_csd(struct mmc_card *card)
95 struct mmc_csd *csd = &card->csd;
96 unsigned int e, m, csd_struct;
97 u32 *resp = card->raw_csd;
99 csd_struct = UNSTUFF_BITS(resp, 126, 2);
101 switch (csd_struct) {
103 m = UNSTUFF_BITS(resp, 115, 4);
104 e = UNSTUFF_BITS(resp, 112, 3);
105 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
106 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
108 m = UNSTUFF_BITS(resp, 99, 4);
109 e = UNSTUFF_BITS(resp, 96, 3);
110 csd->max_dtr = tran_exp[e] * tran_mant[m];
111 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
113 e = UNSTUFF_BITS(resp, 47, 3);
114 m = UNSTUFF_BITS(resp, 62, 12);
115 csd->capacity = (1 + m) << (e + 2);
117 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
118 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
119 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
120 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
121 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
122 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
123 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
125 if (UNSTUFF_BITS(resp, 46, 1)) {
127 } else if (csd->write_blkbits >= 9) {
128 csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
129 csd->erase_size <<= csd->write_blkbits - 9;
134 * This is a block-addressed SDHC or SDXC card. Most
135 * interesting fields are unused and have fixed
136 * values. To avoid getting tripped by buggy cards,
137 * we assume those fixed values ourselves.
139 mmc_card_set_blockaddr(card);
141 csd->tacc_ns = 0; /* Unused */
142 csd->tacc_clks = 0; /* Unused */
144 m = UNSTUFF_BITS(resp, 99, 4);
145 e = UNSTUFF_BITS(resp, 96, 3);
146 csd->max_dtr = tran_exp[e] * tran_mant[m];
147 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
148 csd->c_size = UNSTUFF_BITS(resp, 48, 22);
150 /* SDXC cards have a minimum C_SIZE of 0x00FFFF */
151 if (csd->c_size >= 0xFFFF)
152 mmc_card_set_ext_capacity(card);
154 m = UNSTUFF_BITS(resp, 48, 22);
155 csd->capacity = (1 + m) << 10;
157 csd->read_blkbits = 9;
158 csd->read_partial = 0;
159 csd->write_misalign = 0;
160 csd->read_misalign = 0;
161 csd->r2w_factor = 4; /* Unused */
162 csd->write_blkbits = 9;
163 csd->write_partial = 0;
167 printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
168 mmc_hostname(card->host), csd_struct);
172 card->erase_size = csd->erase_size;
178 * Given a 64-bit response, decode to our card SCR structure.
180 static int mmc_decode_scr(struct mmc_card *card)
182 struct sd_scr *scr = &card->scr;
183 unsigned int scr_struct;
186 resp[3] = card->raw_scr[1];
187 resp[2] = card->raw_scr[0];
189 scr_struct = UNSTUFF_BITS(resp, 60, 4);
190 if (scr_struct != 0) {
191 printk(KERN_ERR "%s: unrecognised SCR structure version %d\n",
192 mmc_hostname(card->host), scr_struct);
196 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
197 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
198 if (scr->sda_vsn == SCR_SPEC_VER_2)
199 /* Check if Physical Layer Spec v3.0 is supported */
200 scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
202 if (UNSTUFF_BITS(resp, 55, 1))
203 card->erased_byte = 0xFF;
205 card->erased_byte = 0x0;
208 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
213 * Fetch and process SD Status register.
215 static int mmc_read_ssr(struct mmc_card *card)
217 unsigned int au, es, et, eo;
221 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
222 printk(KERN_WARNING "%s: card lacks mandatory SD Status "
223 "function.\n", mmc_hostname(card->host));
227 ssr = kmalloc(64, GFP_KERNEL);
231 err = mmc_app_sd_status(card, ssr);
233 printk(KERN_WARNING "%s: problem reading SD Status "
234 "register.\n", mmc_hostname(card->host));
239 for (i = 0; i < 16; i++)
240 ssr[i] = be32_to_cpu(ssr[i]);
242 max_au = card->scr.sda_spec3 ? 0xF : 0x9;
244 * UNSTUFF_BITS only works with four u32s so we have to offset the
245 * bitfield positions accordingly.
247 au = UNSTUFF_BITS(ssr, 428 - 384, 4);
248 //if (au > 0 || au <= 9) { //Modifyed by xbw at 2013-02-28
249 if (au > 0 && au <= max_au) {
250 card->ssr.au = 1 << (au + 4);
251 es = UNSTUFF_BITS(ssr, 408 - 384, 16);
252 et = UNSTUFF_BITS(ssr, 402 - 384, 6);
253 eo = UNSTUFF_BITS(ssr, 400 - 384, 2);
255 card->ssr.erase_timeout = (et * 1000) / es;
256 card->ssr.erase_offset = eo * 1000;
259 printk(KERN_WARNING "%s: SD Status: Invalid Allocation Unit "
260 "size.\n", mmc_hostname(card->host));
268 * Fetches and decodes switch information
270 static int mmc_read_switch(struct mmc_card *card)
275 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
278 if (!(card->csd.cmdclass & CCC_SWITCH)) {
279 printk(KERN_WARNING "%s: card lacks mandatory switch "
280 "function, performance might suffer.\n",
281 mmc_hostname(card->host));
287 status = kmalloc(64, GFP_KERNEL);
289 printk(KERN_ERR "%s: could not allocate a buffer for "
290 "switch capabilities.\n",
291 mmc_hostname(card->host));
295 /* Find out the supported Bus Speed Modes. */
296 //err = mmc_sd_switch(card, 0, 0, 1, status);
297 err = mmc_sd_switch(card, 0, 0, 0, status); //Modifyed by xbw at 2013-02-28
300 * If the host or the card can't do the switch,
301 * fail more gracefully.
303 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
306 printk(KERN_WARNING "%s: problem reading Bus Speed modes.\n",
307 mmc_hostname(card->host));
313 if (status[13] & UHS_SDR50_BUS_SPEED)
314 card->sw_caps.hs_max_dtr = 50000000;
316 //mask the the SD Ver3.0 support,modifyed by xbw at 2012-8-09
317 //if (card->scr.sda_spec3) {
319 card->sw_caps.sd3_bus_mode = status[13];
321 /* Find out Driver Strengths supported by the card */
322 err = mmc_sd_switch(card, 0, 2, 1, status);
325 * If the host or the card can't do the switch,
326 * fail more gracefully.
328 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
331 printk(KERN_WARNING "%s: problem reading "
332 "Driver Strength.\n",
333 mmc_hostname(card->host));
339 card->sw_caps.sd3_drv_type = status[9];
341 /* Find out Current Limits supported by the card */
342 err = mmc_sd_switch(card, 0, 3, 1, status);
345 * If the host or the card can't do the switch,
346 * fail more gracefully.
348 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
351 printk(KERN_WARNING "%s: problem reading "
353 mmc_hostname(card->host));
359 card->sw_caps.sd3_curr_limit = status[7];
369 * Test if the card supports high-speed mode and, if so, switch to it.
371 int mmc_sd_switch_hs(struct mmc_card *card)
376 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
379 if (!(card->csd.cmdclass & CCC_SWITCH))
382 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
385 if (card->sw_caps.hs_max_dtr == 0)
390 status = kmalloc(64, GFP_KERNEL);
392 printk(KERN_ERR "%s: could not allocate a buffer for "
393 "switch capabilities.\n", mmc_hostname(card->host));
397 err = mmc_sd_switch(card, 1, 0, 1, status);
401 if ((status[16] & 0xF) != 1) {
402 printk(KERN_WARNING "%s: Problem switching card "
403 "into high-speed mode!\n",
404 mmc_hostname(card->host));
416 static int sd_select_driver_type(struct mmc_card *card, u8 *status)
418 int host_drv_type = 0, card_drv_type = 0;
422 * If the host doesn't support any of the Driver Types A,C or D,
423 * default Driver Type B is used.
425 if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
426 | MMC_CAP_DRIVER_TYPE_D)))
429 if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) {
430 host_drv_type = MMC_SET_DRIVER_TYPE_A;
431 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
432 card_drv_type = MMC_SET_DRIVER_TYPE_A;
433 else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B)
434 card_drv_type = MMC_SET_DRIVER_TYPE_B;
435 else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
436 card_drv_type = MMC_SET_DRIVER_TYPE_C;
437 } else if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) {
438 host_drv_type = MMC_SET_DRIVER_TYPE_C;
439 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
440 card_drv_type = MMC_SET_DRIVER_TYPE_C;
441 } else if (!(card->host->caps & MMC_CAP_DRIVER_TYPE_D)) {
443 * If we are here, that means only the default driver type
444 * B is supported by the host.
446 host_drv_type = MMC_SET_DRIVER_TYPE_B;
447 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B)
448 card_drv_type = MMC_SET_DRIVER_TYPE_B;
449 else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
450 card_drv_type = MMC_SET_DRIVER_TYPE_C;
453 err = mmc_sd_switch(card, 1, 2, card_drv_type, status);
457 if ((status[15] & 0xF) != card_drv_type) {
458 printk(KERN_WARNING "%s: Problem setting driver strength!\n",
459 mmc_hostname(card->host));
463 mmc_set_driver_type(card->host, host_drv_type);
468 static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
470 unsigned int bus_speed = 0, timing = 0;
474 * If the host doesn't support any of the UHS-I modes, fallback on
477 if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
478 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)))
481 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
482 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
483 bus_speed = UHS_SDR104_BUS_SPEED;
484 timing = MMC_TIMING_UHS_SDR104;
485 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
486 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
487 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
488 bus_speed = UHS_DDR50_BUS_SPEED;
489 timing = MMC_TIMING_UHS_DDR50;
490 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
491 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
492 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
493 SD_MODE_UHS_SDR50)) {
494 bus_speed = UHS_SDR50_BUS_SPEED;
495 timing = MMC_TIMING_UHS_SDR50;
496 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
497 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
498 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
499 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
500 bus_speed = UHS_SDR25_BUS_SPEED;
501 timing = MMC_TIMING_UHS_SDR25;
502 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
503 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
504 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
505 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
506 SD_MODE_UHS_SDR12)) {
507 bus_speed = UHS_SDR12_BUS_SPEED;
508 timing = MMC_TIMING_UHS_SDR12;
509 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
512 card->sd_bus_speed = bus_speed;
513 err = mmc_sd_switch(card, 1, 0, bus_speed, status);
517 if ((status[16] & 0xF) != bus_speed)
518 printk(KERN_WARNING "%s: Problem setting bus speed mode!\n",
519 mmc_hostname(card->host));
521 mmc_set_timing(card->host, timing);
522 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
528 static int sd_set_current_limit(struct mmc_card *card, u8 *status)
530 int current_limit = 0;
534 * Current limit switch is only defined for SDR50, SDR104, and DDR50
535 * bus speed modes. For other bus speed modes, we set the default
536 * current limit of 200mA.
538 if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) ||
539 (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) ||
540 (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) {
541 if (card->host->caps & MMC_CAP_MAX_CURRENT_800) {
542 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
543 current_limit = SD_SET_CURRENT_LIMIT_800;
544 else if (card->sw_caps.sd3_curr_limit &
546 current_limit = SD_SET_CURRENT_LIMIT_600;
547 else if (card->sw_caps.sd3_curr_limit &
549 current_limit = SD_SET_CURRENT_LIMIT_400;
550 else if (card->sw_caps.sd3_curr_limit &
552 current_limit = SD_SET_CURRENT_LIMIT_200;
553 } else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) {
554 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
555 current_limit = SD_SET_CURRENT_LIMIT_600;
556 else if (card->sw_caps.sd3_curr_limit &
558 current_limit = SD_SET_CURRENT_LIMIT_400;
559 else if (card->sw_caps.sd3_curr_limit &
561 current_limit = SD_SET_CURRENT_LIMIT_200;
562 } else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) {
563 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
564 current_limit = SD_SET_CURRENT_LIMIT_400;
565 else if (card->sw_caps.sd3_curr_limit &
567 current_limit = SD_SET_CURRENT_LIMIT_200;
568 } else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) {
569 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
570 current_limit = SD_SET_CURRENT_LIMIT_200;
573 current_limit = SD_SET_CURRENT_LIMIT_200;
575 err = mmc_sd_switch(card, 1, 3, current_limit, status);
579 if (((status[15] >> 4) & 0x0F) != current_limit)
580 printk(KERN_WARNING "%s: Problem setting current limit!\n",
581 mmc_hostname(card->host));
587 * UHS-I specific initialization procedure
589 static int mmc_sd_init_uhs_card(struct mmc_card *card)
594 if (!card->scr.sda_spec3)
597 if (!(card->csd.cmdclass & CCC_SWITCH))
600 status = kmalloc(64, GFP_KERNEL);
602 printk(KERN_ERR "%s: could not allocate a buffer for "
603 "switch capabilities.\n", mmc_hostname(card->host));
607 /* Set 4-bit bus width */
608 if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
609 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
610 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
614 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
617 /* Set the driver strength for the card */
618 err = sd_select_driver_type(card, status);
622 /* Set bus speed mode of the card */
623 err = sd_set_bus_speed_mode(card, status);
627 /* Set current limit for the card */
628 err = sd_set_current_limit(card, status);
632 /* SPI mode doesn't define CMD19 */
633 if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning &&
634 (card->sd_bus_speed == UHS_SDR50_BUS_SPEED ||
635 card->sd_bus_speed == UHS_SDR104_BUS_SPEED))
637 mmc_host_clk_hold(card->host);
638 err = card->host->ops->execute_tuning(card->host,MMC_SEND_TUNING_BLOCK);
646 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
647 card->raw_cid[2], card->raw_cid[3]);
648 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
649 card->raw_csd[2], card->raw_csd[3]);
650 MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
651 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
652 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
653 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
654 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
655 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
656 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
657 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
658 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
659 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
662 static struct attribute *sd_std_attrs[] = {
667 &dev_attr_erase_size.attr,
668 &dev_attr_preferred_erase_size.attr,
669 &dev_attr_fwrev.attr,
670 &dev_attr_hwrev.attr,
671 &dev_attr_manfid.attr,
673 &dev_attr_oemid.attr,
674 &dev_attr_serial.attr,
678 static struct attribute_group sd_std_attr_group = {
679 .attrs = sd_std_attrs,
682 static const struct attribute_group *sd_attr_groups[] = {
687 struct device_type sd_type = {
688 .groups = sd_attr_groups,
692 * Fetch CID from card.
694 int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
699 * Since we're changing the OCR value, we seem to
700 * need to tell some cards to go back to the idle
701 * state. We wait 1ms to give cards time to
707 * If SD_SEND_IF_COND indicates an SD 2.0
708 * compliant card and we should set bit 30
709 * of the ocr to indicate that we can handle
710 * block-addressed SDHC cards.
712 err = mmc_send_if_cond(host, ocr);
717 * If the host supports one of UHS-I modes, request the card
718 * to switch to 1.8V signaling level.
720 if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
721 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))
724 /* If the host can supply more than 150mA, XPC should be set to 1. */
725 if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 |
726 MMC_CAP_SET_XPC_180))
730 err = mmc_send_app_op_cond(host, ocr, rocr);
732 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
733 printk(KERN_WARNING "%s..%d.. ====*Identify the card as SD , but OCR error, so fail to initialize.[%s]\n", \
734 __FUNCTION__, __LINE__, mmc_hostname(host));
740 * In case CCS and S18A in the response is set, start Signal Voltage
741 * Switch procedure. SPI mode doesn't support CMD11.
743 if (!mmc_host_is_spi(host) && rocr &&
744 ((*rocr & 0x41000000) == 0x41000000)) {
745 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true);
752 if (mmc_host_is_spi(host))
753 err = mmc_send_cid(host, cid);
755 err = mmc_all_send_cid(host, cid);
760 int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card)
765 * Fetch CSD from card.
767 err = mmc_send_csd(card, card->raw_csd);
771 err = mmc_decode_csd(card);
778 int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
782 #ifdef CONFIG_MMC_PARANOID_SD_INIT
788 * Fetch SCR from card.
790 err = mmc_app_send_scr(card, card->raw_scr);
794 err = mmc_decode_scr(card);
799 * Fetch and process SD Status register.
801 err = mmc_read_ssr(card);
805 /* Erase init depends on CSD and SSR */
806 mmc_init_erase(card);
809 * Fetch switch information from card.
811 #ifdef CONFIG_MMC_PARANOID_SD_INIT
812 for (retries = 1; retries <= 3; retries++) {
813 err = mmc_read_switch(card);
823 "%s: read switch failed (attempt %d)\n",
824 mmc_hostname(host), retries);
826 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
827 if(0 == host->re_initialized_flags)
829 break; //Added by xbw at 2011-06-21
835 err = mmc_read_switch(card);
843 * For SPI, enable CRC as appropriate.
844 * This CRC enable is located AFTER the reading of the
845 * card registers because some SDHC cards are not able
846 * to provide valid CRCs for non-512-byte blocks.
848 if (mmc_host_is_spi(host)) {
849 err = mmc_spi_set_crc(host, use_spi_crc);
855 * Check if read-only switch is active.
860 if (host->ops->get_ro)
861 ro = host->ops->get_ro(host);
864 printk(KERN_WARNING "%s: host does not "
865 "support reading read-only "
866 "switch. assuming write-enable.\n",
869 mmc_card_set_readonly(card);
876 unsigned mmc_sd_get_max_clock(struct mmc_card *card)
878 unsigned max_dtr = (unsigned int)-1;
880 if (mmc_card_highspeed(card)) {
881 if (max_dtr > card->sw_caps.hs_max_dtr)
882 max_dtr = card->sw_caps.hs_max_dtr;
883 } else if (max_dtr > card->csd.max_dtr) {
885 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
886 //in order to expand the compatibility of card. Added by xbw@2011-03-21
887 card->csd.max_dtr = (card->csd.max_dtr > SD_FPP_FREQ) ? SD_FPP_FREQ : (card->csd.max_dtr);
889 max_dtr = card->csd.max_dtr;
895 void mmc_sd_go_highspeed(struct mmc_card *card)
897 mmc_card_set_highspeed(card);
898 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
902 * Handle the detection and initialisation of a card.
904 * In the case of a resume, "oldcard" will contain the card
905 * we're trying to reinitialise.
907 static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
908 struct mmc_card *oldcard)
910 struct mmc_card *card;
916 WARN_ON(!host->claimed);
918 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
923 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
929 * Allocate card structure.
931 card = mmc_alloc_card(host, &sd_type);
933 return PTR_ERR(card);
935 card->type = MMC_TYPE_SD;
936 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
940 * For native busses: get card RCA and quit open drain mode.
942 if (!mmc_host_is_spi(host)) {
943 err = mmc_send_relative_addr(host, &card->rca);
947 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
951 err = mmc_sd_get_csd(host, card);
955 mmc_decode_cid(card);
959 * Select card, as all following commands rely on that.
961 if (!mmc_host_is_spi(host)) {
962 err = mmc_select_card(card);
967 err = mmc_sd_setup_card(host, card, oldcard != NULL);
971 /* Initialization sequence for UHS-I cards */
972 if (rocr & SD_ROCR_S18A) {
973 err = mmc_sd_init_uhs_card(card);
977 /* Card is an ultra-high-speed card */
978 mmc_sd_card_set_uhs(card);
981 * Since initialization is now complete, enable preset
982 * value registers for UHS-I cards.
984 if (host->ops->enable_preset_value)
985 host->ops->enable_preset_value(host, true);
988 * Attempt to change to high-speed (if supported)
990 err = mmc_sd_switch_hs(card);
992 mmc_sd_go_highspeed(card);
999 mmc_set_clock(host, mmc_sd_get_max_clock(card));
1002 * Switch to wider bus (if supported).
1004 if ((host->caps & MMC_CAP_4_BIT_DATA) &&
1005 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
1006 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
1010 mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
1019 mmc_remove_card(card);
1025 * Host is being removed. Free up the current card.
1027 static void mmc_sd_remove(struct mmc_host *host)
1030 BUG_ON(!host->card);
1032 mmc_remove_card(host->card);
1037 * Card detection callback from host.
1039 static void mmc_sd_detect(struct mmc_host *host)
1042 #ifdef CONFIG_MMC_PARANOID_SD_INIT
1047 BUG_ON(!host->card);
1049 mmc_claim_host(host);
1052 * Just check if our card has been removed.
1054 #ifdef CONFIG_MMC_PARANOID_SD_INIT
1056 err = mmc_send_status(host->card, NULL);
1060 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
1061 if(0 == host->re_initialized_flags)
1064 break; //Added by xbw at 2011-06-21
1074 printk(KERN_ERR "%s(%s): Unable to re-detect card (%d)\n",
1075 __func__, mmc_hostname(host), err);
1078 err = mmc_send_status(host->card, NULL);
1080 mmc_release_host(host);
1083 mmc_sd_remove(host);
1085 mmc_claim_host(host);
1086 mmc_detach_bus(host);
1087 mmc_power_off(host);
1088 mmc_release_host(host);
1093 * Suspend callback from host.
1095 static int mmc_sd_suspend(struct mmc_host *host)
1098 BUG_ON(!host->card);
1100 mmc_claim_host(host);
1101 if (!mmc_host_is_spi(host))
1102 mmc_deselect_cards(host);
1103 host->card->state &= ~MMC_STATE_HIGHSPEED;
1104 mmc_release_host(host);
1110 * Resume callback from host.
1112 * This function tries to determine if the same card is still present
1113 * and, if so, restore all state to it.
1115 static int mmc_sd_resume(struct mmc_host *host)
1118 #ifdef CONFIG_MMC_PARANOID_SD_INIT
1123 BUG_ON(!host->card);
1125 mmc_claim_host(host);
1126 #ifdef CONFIG_MMC_PARANOID_SD_INIT
1129 err = mmc_sd_init_card(host, host->ocr, host->card);
1132 printk(KERN_ERR "%s: Re-init card rc = %d (retries = %d)\n",
1133 mmc_hostname(host), err, retries);
1137 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
1138 if(0 == host->re_initialized_flags)
1140 break; //Added by xbw at 2011-06-21
1148 err = mmc_sd_init_card(host, host->ocr, host->card);
1150 mmc_release_host(host);
1155 static int mmc_sd_power_restore(struct mmc_host *host)
1159 host->card->state &= ~MMC_STATE_HIGHSPEED;
1160 mmc_claim_host(host);
1161 ret = mmc_sd_init_card(host, host->ocr, host->card);
1162 mmc_release_host(host);
1167 static const struct mmc_bus_ops mmc_sd_ops = {
1168 .remove = mmc_sd_remove,
1169 .detect = mmc_sd_detect,
1172 .power_restore = mmc_sd_power_restore,
1175 static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
1176 .remove = mmc_sd_remove,
1177 .detect = mmc_sd_detect,
1178 .suspend = mmc_sd_suspend,
1179 .resume = mmc_sd_resume,
1180 .power_restore = mmc_sd_power_restore,
1183 static void mmc_sd_attach_bus_ops(struct mmc_host *host)
1185 const struct mmc_bus_ops *bus_ops;
1187 if (!mmc_card_is_removable(host))
1188 bus_ops = &mmc_sd_ops_unsafe;
1190 bus_ops = &mmc_sd_ops;
1191 mmc_attach_bus(host, bus_ops);
1195 * Starting point for SD card init.
1197 int mmc_attach_sd(struct mmc_host *host)
1201 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
1202 int retry_times = 3;
1205 #ifdef CONFIG_MMC_PARANOID_SD_INIT
1210 WARN_ON(!host->claimed);
1212 /* Make sure we are at 3.3V signalling voltage */
1213 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false);
1217 /* Disable preset value enable if already set since last time */
1218 if (host->ops->enable_preset_value)
1219 host->ops->enable_preset_value(host, false);
1221 err = mmc_send_app_op_cond(host, 0, &ocr);
1222 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
1224 return 0xFF;//return err; Modifyed by xbw at 2011-11-17
1226 printk(KERN_INFO "\n%s..%d.. ===== Begin to identify card as SD-card. [%s]\n",\
1227 __FUNCTION__, __LINE__, mmc_hostname(host));
1232 mmc_sd_attach_bus_ops(host);
1233 if (host->ocr_avail_sd)
1234 host->ocr_avail = host->ocr_avail_sd;
1237 * We need to get OCR a different way for SPI.
1239 if (mmc_host_is_spi(host)) {
1242 err = mmc_spi_read_ocr(host, 0, &ocr);
1248 * Sanity check the voltages that the card claims to
1252 printk(KERN_WARNING "%s: card claims to support voltages "
1253 "below the defined range. These will be ignored.\n",
1254 mmc_hostname(host));
1258 if ((ocr & MMC_VDD_165_195) &&
1259 !(host->ocr_avail_sd & MMC_VDD_165_195)) {
1260 printk(KERN_WARNING "%s: SD card claims to support the "
1261 "incompletely defined 'low voltage range'. This "
1262 "will be ignored.\n", mmc_hostname(host));
1263 ocr &= ~MMC_VDD_165_195;
1266 host->ocr = mmc_select_voltage(host, ocr);
1269 * Can we support the voltage(s) of the card(s)?
1277 * Detect and init the card.
1279 #ifdef CONFIG_MMC_PARANOID_SD_INIT
1282 err = mmc_sd_init_card(host, host->ocr, NULL);
1286 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
1287 if(0 == host->re_initialized_flags)
1290 break; //Added by xbw at 2011-06-21
1299 printk(KERN_ERR "%s: mmc_sd_init_card() failure (err = %d)\n",
1300 mmc_hostname(host), err);
1304 err = mmc_sd_init_card(host, host->ocr, NULL);
1309 mmc_release_host(host);
1311 #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
1312 //modifyed by xbw at 2011--04-11
1314 err = mmc_add_card(host->card);
1315 mmc_claim_host(host);
1318 //retry add the card; Added by xbw
1319 if((--retry_times >= 0))
1321 printk(KERN_WARNING "\n%s..%s..%d ****error in add partition, so retry. [%s]\n",__FUNCTION__,__FILE__,__LINE__, mmc_hostname(host));
1322 /* sleep some time */
1323 set_current_state(TASK_INTERRUPTIBLE);
1324 schedule_timeout(HZ/2);
1333 err = mmc_add_card(host->card);
1334 mmc_claim_host(host);
1342 mmc_release_host(host);
1343 mmc_remove_card(host->card);
1345 mmc_claim_host(host);
1347 mmc_detach_bus(host);
1349 printk(KERN_ERR "%s: error %d whilst initialising SD card\n",
1350 mmc_hostname(host), err);