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authorPierre Ossman <drzeus@drzeus.cx>2006-12-24 16:46:55 -0500
committerPierre Ossman <drzeus@drzeus.cx>2007-05-01 07:04:18 -0400
commitda7fbe58d2d347e95af699ddf04d885be6362bbe (patch)
tree560df47c41bb64ace46f82f9fa5e2fabc8bafbab /drivers/mmc/core
parentaaac1b470bd0dccb30912356617069dc6199cc80 (diff)
mmc: Separate out protocol ops
Move protocol operations and definitions into their own files in an effort to separate protocol handling and bus arbitration more clearly. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r--drivers/mmc/core/Makefile2
-rw-r--r--drivers/mmc/core/core.c511
-rw-r--r--drivers/mmc/core/core.h32
-rw-r--r--drivers/mmc/core/mmc_ops.c276
-rw-r--r--drivers/mmc/core/mmc_ops.h27
-rw-r--r--drivers/mmc/core/sd_ops.c316
-rw-r--r--drivers/mmc/core/sd_ops.h25
-rw-r--r--drivers/mmc/core/sysfs.c2
-rw-r--r--drivers/mmc/core/sysfs.h27
9 files changed, 756 insertions, 462 deletions
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index f911fbd2845..5977abf3e41 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -7,5 +7,5 @@ ifeq ($(CONFIG_MMC_DEBUG),y)
7endif 7endif
8 8
9obj-$(CONFIG_MMC) += mmc_core.o 9obj-$(CONFIG_MMC) += mmc_core.o
10mmc_core-y := core.o sysfs.o 10mmc_core-y := core.o sysfs.o mmc_ops.o sd_ops.o
11 11
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 334e663e465..310be2fe194 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -23,9 +23,14 @@
23 23
24#include <linux/mmc/card.h> 24#include <linux/mmc/card.h>
25#include <linux/mmc/host.h> 25#include <linux/mmc/host.h>
26#include <linux/mmc/protocol.h> 26#include <linux/mmc/mmc.h>
27#include <linux/mmc/sd.h>
27 28
28#include "core.h" 29#include "core.h"
30#include "sysfs.h"
31
32#include "mmc_ops.h"
33#include "sd_ops.h"
29 34
30#define CMD_RETRIES 3 35#define CMD_RETRIES 3
31 36
@@ -191,80 +196,6 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries
191EXPORT_SYMBOL(mmc_wait_for_cmd); 196EXPORT_SYMBOL(mmc_wait_for_cmd);
192 197
193/** 198/**
194 * mmc_wait_for_app_cmd - start an application command and wait for
195 completion
196 * @host: MMC host to start command
197 * @rca: RCA to send MMC_APP_CMD to
198 * @cmd: MMC command to start
199 * @retries: maximum number of retries
200 *
201 * Sends a MMC_APP_CMD, checks the card response, sends the command
202 * in the parameter and waits for it to complete. Return any error
203 * that occurred while the command was executing. Do not attempt to
204 * parse the response.
205 */
206int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
207 struct mmc_command *cmd, int retries)
208{
209 struct mmc_request mrq;
210 struct mmc_command appcmd;
211
212 int i, err;
213
214 BUG_ON(!host->claimed);
215 BUG_ON(retries < 0);
216
217 err = MMC_ERR_INVALID;
218
219 /*
220 * We have to resend MMC_APP_CMD for each attempt so
221 * we cannot use the retries field in mmc_command.
222 */
223 for (i = 0;i <= retries;i++) {
224 memset(&mrq, 0, sizeof(struct mmc_request));
225
226 appcmd.opcode = MMC_APP_CMD;
227 appcmd.arg = rca << 16;
228 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
229 appcmd.retries = 0;
230 memset(appcmd.resp, 0, sizeof(appcmd.resp));
231 appcmd.data = NULL;
232
233 mrq.cmd = &appcmd;
234 appcmd.data = NULL;
235
236 mmc_wait_for_req(host, &mrq);
237
238 if (appcmd.error) {
239 err = appcmd.error;
240 continue;
241 }
242
243 /* Check that card supported application commands */
244 if (!(appcmd.resp[0] & R1_APP_CMD))
245 return MMC_ERR_FAILED;
246
247 memset(&mrq, 0, sizeof(struct mmc_request));
248
249 memset(cmd->resp, 0, sizeof(cmd->resp));
250 cmd->retries = 0;
251
252 mrq.cmd = cmd;
253 cmd->data = NULL;
254
255 mmc_wait_for_req(host, &mrq);
256
257 err = cmd->error;
258 if (cmd->error == MMC_ERR_NONE)
259 break;
260 }
261
262 return err;
263}
264
265EXPORT_SYMBOL(mmc_wait_for_app_cmd);
266
267/**
268 * mmc_set_data_timeout - set the timeout for a data command 199 * mmc_set_data_timeout - set the timeout for a data command
269 * @data: data phase for command 200 * @data: data phase for command
270 * @card: the MMC card associated with the data transfer 201 * @card: the MMC card associated with the data transfer
@@ -385,60 +316,10 @@ static inline void mmc_set_ios(struct mmc_host *host)
385 host->ops->set_ios(host, ios); 316 host->ops->set_ios(host, ios);
386} 317}
387 318
388static int mmc_select_card(struct mmc_card *card) 319void mmc_set_chip_select(struct mmc_host *host, int mode)
389{
390 int err;
391 struct mmc_command cmd;
392
393 BUG_ON(!card->host->claimed);
394
395 cmd.opcode = MMC_SELECT_CARD;
396 cmd.arg = card->rca << 16;
397 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
398
399 err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES);
400 if (err != MMC_ERR_NONE)
401 return err;
402
403 /*
404 * We can only change the bus width of SD cards when
405 * they are selected so we have to put the handling
406 * here.
407 *
408 * The card is in 1 bit mode by default so
409 * we only need to change if it supports the
410 * wider version.
411 */
412 if (mmc_card_sd(card) &&
413 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) &&
414 (card->host->caps & MMC_CAP_4_BIT_DATA)) {
415
416 struct mmc_command cmd;
417 cmd.opcode = SD_APP_SET_BUS_WIDTH;
418 cmd.arg = SD_BUS_WIDTH_4;
419 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
420
421 err = mmc_wait_for_app_cmd(card->host, card->rca,
422 &cmd, CMD_RETRIES);
423 if (err != MMC_ERR_NONE)
424 return err;
425
426 card->host->ios.bus_width = MMC_BUS_WIDTH_4;
427 mmc_set_ios(card->host);
428 }
429
430 return MMC_ERR_NONE;
431}
432
433
434static inline void mmc_delay(unsigned int ms)
435{ 320{
436 if (ms < 1000 / HZ) { 321 host->ios.chip_select = mode;
437 cond_resched(); 322 mmc_set_ios(host);
438 mdelay(ms);
439 } else {
440 msleep(ms);
441 }
442} 323}
443 324
444/* 325/*
@@ -709,32 +590,6 @@ mmc_alloc_card(struct mmc_host *host, u32 *raw_cid)
709} 590}
710 591
711/* 592/*
712 * Tell attached cards to go to IDLE state
713 */
714static void mmc_idle_cards(struct mmc_host *host)
715{
716 struct mmc_command cmd;
717
718 host->ios.chip_select = MMC_CS_HIGH;
719 mmc_set_ios(host);
720
721 mmc_delay(1);
722
723 cmd.opcode = MMC_GO_IDLE_STATE;
724 cmd.arg = 0;
725 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
726
727 mmc_wait_for_cmd(host, &cmd, 0);
728
729 mmc_delay(1);
730
731 host->ios.chip_select = MMC_CS_DONTCARE;
732 mmc_set_ios(host);
733
734 mmc_delay(1);
735}
736
737/*
738 * Apply power to the MMC stack. This is a two-stage process. 593 * Apply power to the MMC stack. This is a two-stage process.
739 * First, we enable power to the card without the clock running. 594 * First, we enable power to the card without the clock running.
740 * We then wait a bit for the power to stabilise. Finally, 595 * We then wait a bit for the power to stabilise. Finally,
@@ -778,97 +633,6 @@ static void mmc_power_off(struct mmc_host *host)
778 mmc_set_ios(host); 633 mmc_set_ios(host);
779} 634}
780 635
781static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
782{
783 struct mmc_command cmd;
784 int i, err = 0;
785
786 cmd.opcode = MMC_SEND_OP_COND;
787 cmd.arg = ocr;
788 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
789
790 for (i = 100; i; i--) {
791 err = mmc_wait_for_cmd(host, &cmd, 0);
792 if (err != MMC_ERR_NONE)
793 break;
794
795 if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
796 break;
797
798 err = MMC_ERR_TIMEOUT;
799
800 mmc_delay(10);
801 }
802
803 if (rocr)
804 *rocr = cmd.resp[0];
805
806 return err;
807}
808
809static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
810{
811 struct mmc_command cmd;
812 int i, err = 0;
813
814 cmd.opcode = SD_APP_OP_COND;
815 cmd.arg = ocr;
816 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
817
818 for (i = 100; i; i--) {
819 err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES);
820 if (err != MMC_ERR_NONE)
821 break;
822
823 if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
824 break;
825
826 err = MMC_ERR_TIMEOUT;
827
828 mmc_delay(10);
829 }
830
831 if (rocr)
832 *rocr = cmd.resp[0];
833
834 return err;
835}
836
837static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2)
838{
839 struct mmc_command cmd;
840 int err, sd2;
841 static const u8 test_pattern = 0xAA;
842
843 /*
844 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
845 * before SD_APP_OP_COND. This command will harmlessly fail for
846 * SD 1.0 cards.
847 */
848 cmd.opcode = SD_SEND_IF_COND;
849 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
850 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
851
852 err = mmc_wait_for_cmd(host, &cmd, 0);
853 if (err == MMC_ERR_NONE) {
854 if ((cmd.resp[0] & 0xFF) == test_pattern) {
855 sd2 = 1;
856 } else {
857 sd2 = 0;
858 err = MMC_ERR_FAILED;
859 }
860 } else {
861 /*
862 * Treat errors as SD 1.0 card.
863 */
864 sd2 = 0;
865 err = MMC_ERR_NONE;
866 }
867 if (rsd2)
868 *rsd2 = sd2;
869 return err;
870}
871
872/* 636/*
873 * Discover the card by requesting its CID. 637 * Discover the card by requesting its CID.
874 * 638 *
@@ -878,27 +642,18 @@ static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2)
878static void mmc_discover_card(struct mmc_host *host) 642static void mmc_discover_card(struct mmc_host *host)
879{ 643{
880 unsigned int err; 644 unsigned int err;
881 645 u32 cid[4];
882 struct mmc_command cmd;
883 646
884 BUG_ON(host->card); 647 BUG_ON(host->card);
885 648
886 cmd.opcode = MMC_ALL_SEND_CID; 649 err = mmc_all_send_cid(host, cid);
887 cmd.arg = 0;
888 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
889
890 err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
891 if (err == MMC_ERR_TIMEOUT) {
892 err = MMC_ERR_NONE;
893 return;
894 }
895 if (err != MMC_ERR_NONE) { 650 if (err != MMC_ERR_NONE) {
896 printk(KERN_ERR "%s: error requesting CID: %d\n", 651 printk(KERN_ERR "%s: error requesting CID: %d\n",
897 mmc_hostname(host), err); 652 mmc_hostname(host), err);
898 return; 653 return;
899 } 654 }
900 655
901 host->card = mmc_alloc_card(host, cmd.resp); 656 host->card = mmc_alloc_card(host, cid);
902 if (IS_ERR(host->card)) { 657 if (IS_ERR(host->card)) {
903 err = PTR_ERR(host->card); 658 err = PTR_ERR(host->card);
904 host->card = NULL; 659 host->card = NULL;
@@ -908,16 +663,10 @@ static void mmc_discover_card(struct mmc_host *host)
908 if (host->mode == MMC_MODE_SD) { 663 if (host->mode == MMC_MODE_SD) {
909 host->card->type = MMC_TYPE_SD; 664 host->card->type = MMC_TYPE_SD;
910 665
911 cmd.opcode = SD_SEND_RELATIVE_ADDR; 666 err = mmc_send_relative_addr(host, &host->card->rca);
912 cmd.arg = 0;
913 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
914
915 err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
916 if (err != MMC_ERR_NONE) 667 if (err != MMC_ERR_NONE)
917 mmc_card_set_dead(host->card); 668 mmc_card_set_dead(host->card);
918 else { 669 else {
919 host->card->rca = cmd.resp[0] >> 16;
920
921 if (!host->ops->get_ro) { 670 if (!host->ops->get_ro) {
922 printk(KERN_WARNING "%s: host does not " 671 printk(KERN_WARNING "%s: host does not "
923 "support reading read-only " 672 "support reading read-only "
@@ -932,11 +681,7 @@ static void mmc_discover_card(struct mmc_host *host)
932 host->card->type = MMC_TYPE_MMC; 681 host->card->type = MMC_TYPE_MMC;
933 host->card->rca = 1; 682 host->card->rca = 1;
934 683
935 cmd.opcode = MMC_SET_RELATIVE_ADDR; 684 err = mmc_set_relative_addr(host->card);
936 cmd.arg = host->card->rca << 16;
937 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
938
939 err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
940 if (err != MMC_ERR_NONE) 685 if (err != MMC_ERR_NONE)
941 mmc_card_set_dead(host->card); 686 mmc_card_set_dead(host->card);
942 } 687 }
@@ -944,7 +689,6 @@ static void mmc_discover_card(struct mmc_host *host)
944 689
945static void mmc_read_csd(struct mmc_host *host) 690static void mmc_read_csd(struct mmc_host *host)
946{ 691{
947 struct mmc_command cmd;
948 int err; 692 int err;
949 693
950 if (!host->card) 694 if (!host->card)
@@ -952,18 +696,12 @@ static void mmc_read_csd(struct mmc_host *host)
952 if (mmc_card_dead(host->card)) 696 if (mmc_card_dead(host->card))
953 return; 697 return;
954 698
955 cmd.opcode = MMC_SEND_CSD; 699 err = mmc_send_csd(host->card, host->card->raw_csd);
956 cmd.arg = host->card->rca << 16;
957 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
958
959 err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
960 if (err != MMC_ERR_NONE) { 700 if (err != MMC_ERR_NONE) {
961 mmc_card_set_dead(host->card); 701 mmc_card_set_dead(host->card);
962 return; 702 return;
963 } 703 }
964 704
965 memcpy(host->card->raw_csd, cmd.resp, sizeof(host->card->raw_csd));
966
967 mmc_decode_csd(host->card); 705 mmc_decode_csd(host->card);
968 mmc_decode_cid(host->card); 706 mmc_decode_cid(host->card);
969} 707}
@@ -971,13 +709,7 @@ static void mmc_read_csd(struct mmc_host *host)
971static void mmc_process_ext_csd(struct mmc_host *host) 709static void mmc_process_ext_csd(struct mmc_host *host)
972{ 710{
973 int err; 711 int err;
974
975 struct mmc_request mrq;
976 struct mmc_command cmd;
977 struct mmc_data data;
978
979 u8 *ext_csd; 712 u8 *ext_csd;
980 struct scatterlist sg;
981 713
982 if (!host->card) 714 if (!host->card)
983 return; 715 return;
@@ -1000,32 +732,8 @@ static void mmc_process_ext_csd(struct mmc_host *host)
1000 return; 732 return;
1001 } 733 }
1002 734
1003 memset(&cmd, 0, sizeof(struct mmc_command)); 735 err = mmc_send_ext_csd(host->card, ext_csd);
1004 736 if (err != MMC_ERR_NONE) {
1005 cmd.opcode = MMC_SEND_EXT_CSD;
1006 cmd.arg = 0;
1007 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
1008
1009 memset(&data, 0, sizeof(struct mmc_data));
1010
1011 mmc_set_data_timeout(&data, host->card, 0);
1012
1013 data.blksz = 512;
1014 data.blocks = 1;
1015 data.flags = MMC_DATA_READ;
1016 data.sg = &sg;
1017 data.sg_len = 1;
1018
1019 memset(&mrq, 0, sizeof(struct mmc_request));
1020
1021 mrq.cmd = &cmd;
1022 mrq.data = &data;
1023
1024 sg_init_one(&sg, ext_csd, 512);
1025
1026 mmc_wait_for_req(host, &mrq);
1027
1028 if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
1029 if (host->card->csd.capacity == (4096 * 512)) { 737 if (host->card->csd.capacity == (4096 * 512)) {
1030 printk(KERN_ERR "%s: unable to read EXT_CSD " 738 printk(KERN_ERR "%s: unable to read EXT_CSD "
1031 "on a possible high capacity card. " 739 "on a possible high capacity card. "
@@ -1066,14 +774,8 @@ static void mmc_process_ext_csd(struct mmc_host *host)
1066 774
1067 if (host->caps & MMC_CAP_MMC_HIGHSPEED) { 775 if (host->caps & MMC_CAP_MMC_HIGHSPEED) {
1068 /* Activate highspeed support. */ 776 /* Activate highspeed support. */
1069 cmd.opcode = MMC_SWITCH; 777 err = mmc_switch(host->card, MMC_SWITCH_MODE_WRITE_BYTE,
1070 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | 778 EXT_CSD_HS_TIMING, 1);
1071 (EXT_CSD_HS_TIMING << 16) |
1072 (1 << 8) |
1073 EXT_CSD_CMD_SET_NORMAL;
1074 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1075
1076 err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
1077 if (err != MMC_ERR_NONE) { 779 if (err != MMC_ERR_NONE) {
1078 printk("%s: failed to switch card to mmc v4 " 780 printk("%s: failed to switch card to mmc v4 "
1079 "high-speed mode.\n", 781 "high-speed mode.\n",
@@ -1090,14 +792,9 @@ static void mmc_process_ext_csd(struct mmc_host *host)
1090 /* Check for host support for wide-bus modes. */ 792 /* Check for host support for wide-bus modes. */
1091 if (host->caps & MMC_CAP_4_BIT_DATA) { 793 if (host->caps & MMC_CAP_4_BIT_DATA) {
1092 /* Activate 4-bit support. */ 794 /* Activate 4-bit support. */
1093 cmd.opcode = MMC_SWITCH; 795 err = mmc_switch(host->card, MMC_SWITCH_MODE_WRITE_BYTE,
1094 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | 796 EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4 |
1095 (EXT_CSD_BUS_WIDTH << 16) | 797 EXT_CSD_CMD_SET_NORMAL);
1096 (EXT_CSD_BUS_WIDTH_4 << 8) |
1097 EXT_CSD_CMD_SET_NORMAL;
1098 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1099
1100 err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
1101 if (err != MMC_ERR_NONE) { 798 if (err != MMC_ERR_NONE) {
1102 printk("%s: failed to switch card to " 799 printk("%s: failed to switch card to "
1103 "mmc v4 4-bit bus mode.\n", 800 "mmc v4 4-bit bus mode.\n",
@@ -1116,10 +813,6 @@ out:
1116static void mmc_read_scr(struct mmc_host *host) 813static void mmc_read_scr(struct mmc_host *host)
1117{ 814{
1118 int err; 815 int err;
1119 struct mmc_request mrq;
1120 struct mmc_command cmd;
1121 struct mmc_data data;
1122 struct scatterlist sg;
1123 816
1124 if (!host->card) 817 if (!host->card)
1125 return; 818 return;
@@ -1128,61 +821,19 @@ static void mmc_read_scr(struct mmc_host *host)
1128 if (!mmc_card_sd(host->card)) 821 if (!mmc_card_sd(host->card))
1129 return; 822 return;
1130 823
1131 memset(&cmd, 0, sizeof(struct mmc_command)); 824 err = mmc_app_send_scr(host->card, host->card->raw_scr);
1132 825 if (err != MMC_ERR_NONE) {
1133 cmd.opcode = MMC_APP_CMD;
1134 cmd.arg = host->card->rca << 16;
1135 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1136
1137 err = mmc_wait_for_cmd(host, &cmd, 0);
1138 if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) {
1139 mmc_card_set_dead(host->card);
1140 return;
1141 }
1142
1143 memset(&cmd, 0, sizeof(struct mmc_command));
1144
1145 cmd.opcode = SD_APP_SEND_SCR;
1146 cmd.arg = 0;
1147 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
1148
1149 memset(&data, 0, sizeof(struct mmc_data));
1150
1151 mmc_set_data_timeout(&data, host->card, 0);
1152
1153 data.blksz = 1 << 3;
1154 data.blocks = 1;
1155 data.flags = MMC_DATA_READ;
1156 data.sg = &sg;
1157 data.sg_len = 1;
1158
1159 memset(&mrq, 0, sizeof(struct mmc_request));
1160
1161 mrq.cmd = &cmd;
1162 mrq.data = &data;
1163
1164 sg_init_one(&sg, (u8*)host->card->raw_scr, 8);
1165
1166 mmc_wait_for_req(host, &mrq);
1167
1168 if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
1169 mmc_card_set_dead(host->card); 826 mmc_card_set_dead(host->card);
1170 return; 827 return;
1171 } 828 }
1172 829
1173 host->card->raw_scr[0] = ntohl(host->card->raw_scr[0]);
1174 host->card->raw_scr[1] = ntohl(host->card->raw_scr[1]);
1175
1176 mmc_decode_scr(host->card); 830 mmc_decode_scr(host->card);
1177} 831}
1178 832
1179static void mmc_read_switch_caps(struct mmc_host *host) 833static void mmc_read_switch_caps(struct mmc_host *host)
1180{ 834{
1181 struct mmc_request mrq; 835 int err;
1182 struct mmc_command cmd;
1183 struct mmc_data data;
1184 unsigned char *status; 836 unsigned char *status;
1185 struct scatterlist sg;
1186 837
1187 if (!(host->caps & MMC_CAP_SD_HIGHSPEED)) 838 if (!(host->caps & MMC_CAP_SD_HIGHSPEED))
1188 return; 839 return;
@@ -1204,32 +855,9 @@ static void mmc_read_switch_caps(struct mmc_host *host)
1204 return; 855 return;
1205 } 856 }
1206 857
1207 memset(&cmd, 0, sizeof(struct mmc_command)); 858 err = mmc_sd_switch(host->card, SD_SWITCH_CHECK,
1208 859 SD_SWITCH_GRP_ACCESS, SD_SWITCH_ACCESS_HS, status);
1209 cmd.opcode = SD_SWITCH; 860 if (err != MMC_ERR_NONE) {
1210 cmd.arg = 0x00FFFFF1;
1211 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
1212
1213 memset(&data, 0, sizeof(struct mmc_data));
1214
1215 mmc_set_data_timeout(&data, host->card, 0);
1216
1217 data.blksz = 64;
1218 data.blocks = 1;
1219 data.flags = MMC_DATA_READ;
1220 data.sg = &sg;
1221 data.sg_len = 1;
1222
1223 memset(&mrq, 0, sizeof(struct mmc_request));
1224
1225 mrq.cmd = &cmd;
1226 mrq.data = &data;
1227
1228 sg_init_one(&sg, status, 64);
1229
1230 mmc_wait_for_req(host, &mrq);
1231
1232 if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
1233 printk("%s: unable to read switch capabilities, " 861 printk("%s: unable to read switch capabilities, "
1234 "performance might suffer.\n", 862 "performance might suffer.\n",
1235 mmc_hostname(host)); 863 mmc_hostname(host));
@@ -1239,33 +867,9 @@ static void mmc_read_switch_caps(struct mmc_host *host)
1239 if (status[13] & 0x02) 867 if (status[13] & 0x02)
1240 host->card->sw_caps.hs_max_dtr = 50000000; 868 host->card->sw_caps.hs_max_dtr = 50000000;
1241 869
1242 memset(&cmd, 0, sizeof(struct mmc_command)); 870 err = mmc_sd_switch(host->card, SD_SWITCH_SET,
1243 871 SD_SWITCH_GRP_ACCESS, SD_SWITCH_ACCESS_HS, status);
1244 cmd.opcode = SD_SWITCH; 872 if (err != MMC_ERR_NONE || (status[16] & 0xF) != 1) {
1245 cmd.arg = 0x80FFFFF1;
1246 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
1247
1248 memset(&data, 0, sizeof(struct mmc_data));
1249
1250 mmc_set_data_timeout(&data, host->card, 0);
1251
1252 data.blksz = 64;
1253 data.blocks = 1;
1254 data.flags = MMC_DATA_READ;
1255 data.sg = &sg;
1256 data.sg_len = 1;
1257
1258 memset(&mrq, 0, sizeof(struct mmc_request));
1259
1260 mrq.cmd = &cmd;
1261 mrq.data = &data;
1262
1263 sg_init_one(&sg, status, 64);
1264
1265 mmc_wait_for_req(host, &mrq);
1266
1267 if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE ||
1268 (status[16] & 0xF) != 1) {
1269 printk(KERN_WARNING "%s: Problem switching card " 873 printk(KERN_WARNING "%s: Problem switching card "
1270 "into high-speed mode!\n", 874 "into high-speed mode!\n",
1271 mmc_hostname(host)); 875 mmc_hostname(host));
@@ -1314,16 +918,11 @@ static unsigned int mmc_calculate_clock(struct mmc_host *host)
1314 */ 918 */
1315static void mmc_check_card(struct mmc_card *card) 919static void mmc_check_card(struct mmc_card *card)
1316{ 920{
1317 struct mmc_command cmd;
1318 int err; 921 int err;
1319 922
1320 BUG_ON(!card); 923 BUG_ON(!card);
1321 924
1322 cmd.opcode = MMC_SEND_STATUS; 925 err = mmc_send_status(card, NULL);
1323 cmd.arg = card->rca << 16;
1324 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1325
1326 err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES);
1327 if (err == MMC_ERR_NONE) 926 if (err == MMC_ERR_NONE)
1328 return; 927 return;
1329 928
@@ -1338,9 +937,9 @@ static void mmc_setup(struct mmc_host *host)
1338 host->mode = MMC_MODE_SD; 937 host->mode = MMC_MODE_SD;
1339 938
1340 mmc_power_up(host); 939 mmc_power_up(host);
1341 mmc_idle_cards(host); 940 mmc_go_idle(host);
1342 941
1343 err = mmc_send_if_cond(host, host->ocr_avail, NULL); 942 err = mmc_send_if_cond(host, host->ocr_avail);
1344 if (err != MMC_ERR_NONE) { 943 if (err != MMC_ERR_NONE) {
1345 return; 944 return;
1346 } 945 }
@@ -1369,7 +968,7 @@ static void mmc_setup(struct mmc_host *host)
1369 * state. We wait 1ms to give cards time to 968 * state. We wait 1ms to give cards time to
1370 * respond. 969 * respond.
1371 */ 970 */
1372 mmc_idle_cards(host); 971 mmc_go_idle(host);
1373 972
1374 /* 973 /*
1375 * Send the selected OCR multiple times... until the cards 974 * Send the selected OCR multiple times... until the cards
@@ -1377,17 +976,17 @@ static void mmc_setup(struct mmc_host *host)
1377 * (My SanDisk card seems to need this.) 976 * (My SanDisk card seems to need this.)
1378 */ 977 */
1379 if (host->mode == MMC_MODE_SD) { 978 if (host->mode == MMC_MODE_SD) {
1380 int err, sd2; 979 /*
1381 err = mmc_send_if_cond(host, host->ocr, &sd2); 980 * If SD_SEND_IF_COND indicates an SD 2.0
1382 if (err == MMC_ERR_NONE) { 981 * compliant card and we should set bit 30
1383 /* 982 * of the ocr to indicate that we can handle
1384 * If SD_SEND_IF_COND indicates an SD 2.0 983 * block-addressed SDHC cards.
1385 * compliant card and we should set bit 30 984 */
1386 * of the ocr to indicate that we can handle 985 err = mmc_send_if_cond(host, host->ocr);
1387 * block-addressed SDHC cards. 986 if (err == MMC_ERR_NONE)
1388 */ 987 ocr = host->ocr | (1 << 30);
1389 mmc_send_app_op_cond(host, host->ocr | (sd2 << 30), NULL); 988
1390 } 989 mmc_send_app_op_cond(host, ocr, NULL);
1391 } else { 990 } else {
1392 /* The extra bit indicates that we support high capacity */ 991 /* The extra bit indicates that we support high capacity */
1393 mmc_send_op_cond(host, host->ocr | (1 << 30), NULL); 992 mmc_send_op_cond(host, host->ocr | (1 << 30), NULL);
@@ -1409,6 +1008,24 @@ static void mmc_setup(struct mmc_host *host)
1409 mmc_card_set_dead(host->card); 1008 mmc_card_set_dead(host->card);
1410 } 1009 }
1411 1010
1011 /*
1012 * The card is in 1 bit mode by default so
1013 * we only need to change if it supports the
1014 * wider version.
1015 */
1016 if (host->card && !mmc_card_dead(host->card) &&
1017 mmc_card_sd(host->card) &&
1018 (host->card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) &&
1019 (host->card->host->caps & MMC_CAP_4_BIT_DATA)) {
1020 err = mmc_app_set_bus_width(host->card, SD_BUS_WIDTH_4);
1021 if (err != MMC_ERR_NONE)
1022 mmc_card_set_dead(host->card);
1023 else {
1024 host->ios.bus_width = MMC_BUS_WIDTH_4;
1025 mmc_set_ios(host);
1026 }
1027 }
1028
1412 if (host->mode == MMC_MODE_SD) { 1029 if (host->mode == MMC_MODE_SD) {
1413 mmc_read_scr(host); 1030 mmc_read_scr(host);
1414 mmc_read_switch_caps(host); 1031 mmc_read_switch_caps(host);
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 076cb2f49a0..1c1066342fb 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -2,24 +2,30 @@
2 * linux/drivers/mmc/core/core.h 2 * linux/drivers/mmc/core/core.h
3 * 3 *
4 * Copyright (C) 2003 Russell King, All Rights Reserved. 4 * Copyright (C) 2003 Russell King, All Rights Reserved.
5 * Copyright 2007 Pierre Ossman
5 * 6 *
6 * This program is free software; you can redistribute it and/or modify 7 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as 8 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation. 9 * published by the Free Software Foundation.
9 */ 10 */
10#ifndef _MMC_CORE_H 11#ifndef _MMC_CORE_CORE_H
11#define _MMC_CORE_H 12#define _MMC_CORE_CORE_H
12/* core-internal functions */
13void mmc_init_card(struct mmc_card *card, struct mmc_host *host);
14int mmc_register_card(struct mmc_card *card);
15void mmc_remove_card(struct mmc_card *card);
16 13
17struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev); 14#include <linux/delay.h>
18int mmc_add_host_sysfs(struct mmc_host *host); 15
19void mmc_remove_host_sysfs(struct mmc_host *host); 16#define MMC_CMD_RETRIES 3
20void mmc_free_host_sysfs(struct mmc_host *host); 17
18void mmc_set_chip_select(struct mmc_host *host, int mode);
19
20static inline void mmc_delay(unsigned int ms)
21{
22 if (ms < 1000 / HZ) {
23 cond_resched();
24 mdelay(ms);
25 } else {
26 msleep(ms);
27 }
28}
21 29
22int mmc_schedule_work(struct work_struct *work);
23int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay);
24void mmc_flush_scheduled_work(void);
25#endif 30#endif
31
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
new file mode 100644
index 00000000000..7dd720fa589
--- /dev/null
+++ b/drivers/mmc/core/mmc_ops.c
@@ -0,0 +1,276 @@
1/*
2 * linux/drivers/mmc/mmc_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#include <linux/types.h>
13#include <asm/scatterlist.h>
14#include <linux/scatterlist.h>
15
16#include <linux/mmc/host.h>
17#include <linux/mmc/card.h>
18#include <linux/mmc/mmc.h>
19
20#include "core.h"
21#include "mmc_ops.h"
22
23static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
24{
25 int err;
26 struct mmc_command cmd;
27
28 BUG_ON(!host);
29
30 memset(&cmd, 0, sizeof(struct mmc_command));
31
32 cmd.opcode = MMC_SELECT_CARD;
33
34 if (card) {
35 cmd.arg = card->rca << 16;
36 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
37 } else {
38 cmd.arg = 0;
39 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
40 }
41
42 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
43 if (err != MMC_ERR_NONE)
44 return err;
45
46 return MMC_ERR_NONE;
47}
48
49int mmc_select_card(struct mmc_card *card)
50{
51 BUG_ON(!card);
52
53 return _mmc_select_card(card->host, card);
54}
55
56int mmc_deselect_cards(struct mmc_host *host)
57{
58 return _mmc_select_card(host, NULL);
59}
60
61int mmc_go_idle(struct mmc_host *host)
62{
63 int err;
64 struct mmc_command cmd;
65
66 mmc_set_chip_select(host, MMC_CS_HIGH);
67
68 mmc_delay(1);
69
70 memset(&cmd, 0, sizeof(struct mmc_command));
71
72 cmd.opcode = MMC_GO_IDLE_STATE;
73 cmd.arg = 0;
74 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
75
76 err = mmc_wait_for_cmd(host, &cmd, 0);
77
78 mmc_delay(1);
79
80 mmc_set_chip_select(host, MMC_CS_DONTCARE);
81
82 mmc_delay(1);
83
84 return err;
85}
86
87int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
88{
89 struct mmc_command cmd;
90 int i, err = 0;
91
92 BUG_ON(!host);
93
94 memset(&cmd, 0, sizeof(struct mmc_command));
95
96 cmd.opcode = MMC_SEND_OP_COND;
97 cmd.arg = ocr;
98 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
99
100 for (i = 100; i; i--) {
101 err = mmc_wait_for_cmd(host, &cmd, 0);
102 if (err != MMC_ERR_NONE)
103 break;
104
105 if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
106 break;
107
108 err = MMC_ERR_TIMEOUT;
109
110 mmc_delay(10);
111 }
112
113 if (rocr)
114 *rocr = cmd.resp[0];
115
116 return err;
117}
118
119int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
120{
121 int err;
122 struct mmc_command cmd;
123
124 BUG_ON(!host);
125 BUG_ON(!cid);
126
127 memset(&cmd, 0, sizeof(struct mmc_command));
128
129 cmd.opcode = MMC_ALL_SEND_CID;
130 cmd.arg = 0;
131 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
132
133 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
134 if (err != MMC_ERR_NONE)
135 return err;
136
137 memcpy(cid, cmd.resp, sizeof(u32) * 4);
138
139 return MMC_ERR_NONE;
140}
141
142int mmc_set_relative_addr(struct mmc_card *card)
143{
144 int err;
145 struct mmc_command cmd;
146
147 BUG_ON(!card);
148 BUG_ON(!card->host);
149
150 memset(&cmd, 0, sizeof(struct mmc_command));
151
152 cmd.opcode = MMC_SET_RELATIVE_ADDR;
153 cmd.arg = card->rca << 16;
154 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
155
156 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
157 if (err != MMC_ERR_NONE)
158 return err;
159
160 return MMC_ERR_NONE;
161}
162
163int mmc_send_csd(struct mmc_card *card, u32 *csd)
164{
165 int err;
166 struct mmc_command cmd;
167
168 BUG_ON(!card);
169 BUG_ON(!card->host);
170 BUG_ON(!csd);
171
172 memset(&cmd, 0, sizeof(struct mmc_command));
173
174 cmd.opcode = MMC_SEND_CSD;
175 cmd.arg = card->rca << 16;
176 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
177
178 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
179 if (err != MMC_ERR_NONE)
180 return err;
181
182 memcpy(csd, cmd.resp, sizeof(u32) * 4);
183
184 return MMC_ERR_NONE;
185}
186
187int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
188{
189 struct mmc_request mrq;
190 struct mmc_command cmd;
191 struct mmc_data data;
192 struct scatterlist sg;
193
194 BUG_ON(!card);
195 BUG_ON(!card->host);
196 BUG_ON(!ext_csd);
197
198 memset(&mrq, 0, sizeof(struct mmc_request));
199 memset(&cmd, 0, sizeof(struct mmc_command));
200 memset(&data, 0, sizeof(struct mmc_data));
201
202 mrq.cmd = &cmd;
203 mrq.data = &data;
204
205 cmd.opcode = MMC_SEND_EXT_CSD;
206 cmd.arg = 0;
207 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
208
209 data.blksz = 512;
210 data.blocks = 1;
211 data.flags = MMC_DATA_READ;
212 data.sg = &sg;
213 data.sg_len = 1;
214
215 sg_init_one(&sg, ext_csd, 512);
216
217 mmc_set_data_timeout(&data, card, 0);
218
219 mmc_wait_for_req(card->host, &mrq);
220
221 if (cmd.error != MMC_ERR_NONE)
222 return cmd.error;
223 if (data.error != MMC_ERR_NONE)
224 return data.error;
225
226 return MMC_ERR_NONE;
227}
228
229int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
230{
231 int err;
232 struct mmc_command cmd;
233
234 BUG_ON(!card);
235 BUG_ON(!card->host);
236
237 memset(&cmd, 0, sizeof(struct mmc_command));
238
239 cmd.opcode = MMC_SWITCH;
240 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
241 (index << 16) |
242 (value << 8) |
243 set;
244 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
245
246 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
247 if (err != MMC_ERR_NONE)
248 return err;
249
250 return MMC_ERR_NONE;
251}
252
253int mmc_send_status(struct mmc_card *card, u32 *status)
254{
255 int err;
256 struct mmc_command cmd;
257
258 BUG_ON(!card);
259 BUG_ON(!card->host);
260
261 memset(&cmd, 0, sizeof(struct mmc_command));
262
263 cmd.opcode = MMC_SEND_STATUS;
264 cmd.arg = card->rca << 16;
265 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
266
267 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
268 if (err != MMC_ERR_NONE)
269 return err;
270
271 if (status)
272 *status = cmd.resp[0];
273
274 return MMC_ERR_NONE;
275}
276
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
new file mode 100644
index 00000000000..7a481e8ca5e
--- /dev/null
+++ b/drivers/mmc/core/mmc_ops.h
@@ -0,0 +1,27 @@
1/*
2 * linux/drivers/mmc/mmc_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#ifndef _MMC_MMC_OPS_H
13#define _MMC_MMC_OPS_H
14
15int mmc_select_card(struct mmc_card *card);
16int mmc_deselect_cards(struct mmc_host *host);
17int mmc_go_idle(struct mmc_host *host);
18int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
19int mmc_all_send_cid(struct mmc_host *host, u32 *cid);
20int mmc_set_relative_addr(struct mmc_card *card);
21int mmc_send_csd(struct mmc_card *card, u32 *csd);
22int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
23int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value);
24int mmc_send_status(struct mmc_card *card, u32 *status);
25
26#endif
27
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
new file mode 100644
index 00000000000..9697ce58110
--- /dev/null
+++ b/drivers/mmc/core/sd_ops.c
@@ -0,0 +1,316 @@
1/*
2 * linux/drivers/mmc/sd_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#include <linux/types.h>
13#include <asm/scatterlist.h>
14#include <linux/scatterlist.h>
15
16#include <linux/mmc/host.h>
17#include <linux/mmc/card.h>
18#include <linux/mmc/mmc.h>
19#include <linux/mmc/sd.h>
20
21#include "core.h"
22#include "sd_ops.h"
23
24/**
25 * mmc_wait_for_app_cmd - start an application command and wait for
26 completion
27 * @host: MMC host to start command
28 * @rca: RCA to send MMC_APP_CMD to
29 * @cmd: MMC command to start
30 * @retries: maximum number of retries
31 *
32 * Sends a MMC_APP_CMD, checks the card response, sends the command
33 * in the parameter and waits for it to complete. Return any error
34 * that occurred while the command was executing. Do not attempt to
35 * parse the response.
36 */
37int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
38 struct mmc_command *cmd, int retries)
39{
40 struct mmc_request mrq;
41
42 int i, err;
43
44 BUG_ON(!cmd);
45 BUG_ON(retries < 0);
46
47 err = MMC_ERR_INVALID;
48
49 /*
50 * We have to resend MMC_APP_CMD for each attempt so
51 * we cannot use the retries field in mmc_command.
52 */
53 for (i = 0;i <= retries;i++) {
54 memset(&mrq, 0, sizeof(struct mmc_request));
55
56 err = mmc_app_cmd(host, card);
57 if (err != MMC_ERR_NONE)
58 continue;
59
60 memset(&mrq, 0, sizeof(struct mmc_request));
61
62 memset(cmd->resp, 0, sizeof(cmd->resp));
63 cmd->retries = 0;
64
65 mrq.cmd = cmd;
66 cmd->data = NULL;
67
68 mmc_wait_for_req(host, &mrq);
69
70 err = cmd->error;
71 if (cmd->error == MMC_ERR_NONE)
72 break;
73 }
74
75 return err;
76}
77
78EXPORT_SYMBOL(mmc_wait_for_app_cmd);
79
80int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
81{
82 int err;
83 struct mmc_command cmd;
84
85 BUG_ON(!host);
86 BUG_ON(card && (card->host != host));
87
88 cmd.opcode = MMC_APP_CMD;
89
90 if (card) {
91 cmd.arg = card->rca << 16;
92 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
93 } else {
94 cmd.arg = 0;
95 cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR;
96 }
97
98 err = mmc_wait_for_cmd(host, &cmd, 0);
99 if (err != MMC_ERR_NONE)
100 return err;
101
102 /* Check that card supported application commands */
103 if (!(cmd.resp[0] & R1_APP_CMD))
104 return MMC_ERR_FAILED;
105
106 return MMC_ERR_NONE;
107}
108
109int mmc_app_set_bus_width(struct mmc_card *card, int width)
110{
111 int err;
112 struct mmc_command cmd;
113
114 BUG_ON(!card);
115 BUG_ON(!card->host);
116
117 memset(&cmd, 0, sizeof(struct mmc_command));
118
119 cmd.opcode = SD_APP_SET_BUS_WIDTH;
120 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
121
122 switch (width) {
123 case MMC_BUS_WIDTH_1:
124 cmd.arg = SD_BUS_WIDTH_1;
125 break;
126 case MMC_BUS_WIDTH_4:
127 cmd.arg = SD_BUS_WIDTH_4;
128 break;
129 default:
130 return MMC_ERR_INVALID;
131 }
132
133 err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
134 if (err != MMC_ERR_NONE)
135 return err;
136
137 return MMC_ERR_NONE;
138}
139
140int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
141{
142 struct mmc_command cmd;
143 int i, err = 0;
144
145 BUG_ON(!host);
146
147 memset(&cmd, 0, sizeof(struct mmc_command));
148
149 cmd.opcode = SD_APP_OP_COND;
150 cmd.arg = ocr;
151 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
152
153 for (i = 100; i; i--) {
154 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
155 if (err != MMC_ERR_NONE)
156 break;
157
158 if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
159 break;
160
161 err = MMC_ERR_TIMEOUT;
162
163 mmc_delay(10);
164 }
165
166 if (rocr)
167 *rocr = cmd.resp[0];
168
169 return err;
170}
171
172int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
173{
174 struct mmc_command cmd;
175 int err;
176 static const u8 test_pattern = 0xAA;
177
178 /*
179 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
180 * before SD_APP_OP_COND. This command will harmlessly fail for
181 * SD 1.0 cards.
182 */
183 cmd.opcode = SD_SEND_IF_COND;
184 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
185 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
186
187 err = mmc_wait_for_cmd(host, &cmd, 0);
188 if (err != MMC_ERR_NONE)
189 return err;
190
191 if ((cmd.resp[0] & 0xFF) != test_pattern)
192 return MMC_ERR_FAILED;
193
194 return MMC_ERR_NONE;
195}
196
197int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
198{
199 int err;
200 struct mmc_command cmd;
201
202 BUG_ON(!host);
203 BUG_ON(!rca);
204
205 memset(&cmd, 0, sizeof(struct mmc_command));
206
207 cmd.opcode = SD_SEND_RELATIVE_ADDR;
208 cmd.arg = 0;
209 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
210
211 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
212 if (err != MMC_ERR_NONE)
213 return err;
214
215 *rca = cmd.resp[0] >> 16;
216
217 return MMC_ERR_NONE;
218}
219
220int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
221{
222 int err;
223 struct mmc_request mrq;
224 struct mmc_command cmd;
225 struct mmc_data data;
226 struct scatterlist sg;
227
228 BUG_ON(!card);
229 BUG_ON(!card->host);
230 BUG_ON(!scr);
231
232 err = mmc_app_cmd(card->host, card);
233 if (err != MMC_ERR_NONE)
234 return err;
235
236 memset(&mrq, 0, sizeof(struct mmc_request));
237 memset(&cmd, 0, sizeof(struct mmc_command));
238 memset(&data, 0, sizeof(struct mmc_data));
239
240 mrq.cmd = &cmd;
241 mrq.data = &data;
242
243 cmd.opcode = SD_APP_SEND_SCR;
244 cmd.arg = 0;
245 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
246
247 data.blksz = 8;
248 data.blocks = 1;
249 data.flags = MMC_DATA_READ;
250 data.sg = &sg;
251 data.sg_len = 1;
252
253 sg_init_one(&sg, scr, 8);
254
255 mmc_set_data_timeout(&data, card, 0);
256
257 mmc_wait_for_req(card->host, &mrq);
258
259 if (cmd.error != MMC_ERR_NONE)
260 return cmd.error;
261 if (data.error != MMC_ERR_NONE)
262 return data.error;
263
264 scr[0] = ntohl(scr[0]);
265 scr[1] = ntohl(scr[1]);
266
267 return MMC_ERR_NONE;
268}
269
270int mmc_sd_switch(struct mmc_card *card, int mode, int group,
271 u8 value, u8 *resp)
272{
273 struct mmc_request mrq;
274 struct mmc_command cmd;
275 struct mmc_data data;
276 struct scatterlist sg;
277
278 BUG_ON(!card);
279 BUG_ON(!card->host);
280
281 mode = !!mode;
282 value &= 0xF;
283
284 memset(&mrq, 0, sizeof(struct mmc_request));
285 memset(&cmd, 0, sizeof(struct mmc_command));
286 memset(&data, 0, sizeof(struct mmc_data));
287
288 mrq.cmd = &cmd;
289 mrq.data = &data;
290
291 cmd.opcode = SD_SWITCH;
292 cmd.arg = mode << 31 | 0x00FFFFFF;
293 cmd.arg &= ~(0xF << (group * 4));
294 cmd.arg |= value << (group * 4);
295 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
296
297 data.blksz = 64;
298 data.blocks = 1;
299 data.flags = MMC_DATA_READ;
300 data.sg = &sg;
301 data.sg_len = 1;
302
303 sg_init_one(&sg, resp, 64);
304
305 mmc_set_data_timeout(&data, card, 0);
306
307 mmc_wait_for_req(card->host, &mrq);
308
309 if (cmd.error != MMC_ERR_NONE)
310 return cmd.error;
311 if (data.error != MMC_ERR_NONE)
312 return data.error;
313
314 return MMC_ERR_NONE;
315}
316
diff --git a/drivers/mmc/core/sd_ops.h b/drivers/mmc/core/sd_ops.h
new file mode 100644
index 00000000000..1240fddba5e
--- /dev/null
+++ b/drivers/mmc/core/sd_ops.h
@@ -0,0 +1,25 @@
1/*
2 * linux/drivers/mmc/sd_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#ifndef _MMC_SD_OPS_H
13#define _MMC_SD_OPS_H
14
15int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card);
16int mmc_app_set_bus_width(struct mmc_card *card, int width);
17int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
18int mmc_send_if_cond(struct mmc_host *host, u32 ocr);
19int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca);
20int mmc_app_send_scr(struct mmc_card *card, u32 *scr);
21int mmc_sd_switch(struct mmc_card *card, int mode, int group,
22 u8 value, u8 *resp);
23
24#endif
25
diff --git a/drivers/mmc/core/sysfs.c b/drivers/mmc/core/sysfs.c
index bf9a5f8beb8..5c9ce02e7e5 100644
--- a/drivers/mmc/core/sysfs.c
+++ b/drivers/mmc/core/sysfs.c
@@ -18,7 +18,7 @@
18#include <linux/mmc/card.h> 18#include <linux/mmc/card.h>
19#include <linux/mmc/host.h> 19#include <linux/mmc/host.h>
20 20
21#include "core.h" 21#include "sysfs.h"
22 22
23#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) 23#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
24#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) 24#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
diff --git a/drivers/mmc/core/sysfs.h b/drivers/mmc/core/sysfs.h
new file mode 100644
index 00000000000..80e29b35828
--- /dev/null
+++ b/drivers/mmc/core/sysfs.h
@@ -0,0 +1,27 @@
1/*
2 * linux/drivers/mmc/core/sysfs.h
3 *
4 * Copyright (C) 2003 Russell King, All Rights Reserved.
5 * Copyright 2007 Pierre Ossman
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#ifndef _MMC_CORE_SYSFS_H
12#define _MMC_CORE_SYSFS_H
13
14void mmc_init_card(struct mmc_card *card, struct mmc_host *host);
15int mmc_register_card(struct mmc_card *card);
16void mmc_remove_card(struct mmc_card *card);
17
18struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev);
19int mmc_add_host_sysfs(struct mmc_host *host);
20void mmc_remove_host_sysfs(struct mmc_host *host);
21void mmc_free_host_sysfs(struct mmc_host *host);
22
23int mmc_schedule_work(struct work_struct *work);
24int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay);
25void mmc_flush_scheduled_work(void);
26
27#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-20 14:59:23 -0400