diff options
Diffstat (limited to 'drivers/mmc/core/core.c')
-rw-r--r-- | drivers/mmc/core/core.c | 511 |
1 files changed, 64 insertions, 447 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 334e663..310be2f 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -23,9 +23,14 @@ #include <linux/mmc/card.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sd.h> #include "core.h" +#include "sysfs.h" + +#include "mmc_ops.h" +#include "sd_ops.h" #define CMD_RETRIES 3 @@ -191,80 +196,6 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries EXPORT_SYMBOL(mmc_wait_for_cmd); /** - * mmc_wait_for_app_cmd - start an application command and wait for - completion - * @host: MMC host to start command - * @rca: RCA to send MMC_APP_CMD to - * @cmd: MMC command to start - * @retries: maximum number of retries - * - * Sends a MMC_APP_CMD, checks the card response, sends the command - * in the parameter and waits for it to complete. Return any error - * that occurred while the command was executing. Do not attempt to - * parse the response. - */ -int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca, - struct mmc_command *cmd, int retries) -{ - struct mmc_request mrq; - struct mmc_command appcmd; - - int i, err; - - BUG_ON(!host->claimed); - BUG_ON(retries < 0); - - err = MMC_ERR_INVALID; - - /* - * We have to resend MMC_APP_CMD for each attempt so - * we cannot use the retries field in mmc_command. - */ - for (i = 0;i <= retries;i++) { - memset(&mrq, 0, sizeof(struct mmc_request)); - - appcmd.opcode = MMC_APP_CMD; - appcmd.arg = rca << 16; - appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - appcmd.retries = 0; - memset(appcmd.resp, 0, sizeof(appcmd.resp)); - appcmd.data = NULL; - - mrq.cmd = &appcmd; - appcmd.data = NULL; - - mmc_wait_for_req(host, &mrq); - - if (appcmd.error) { - err = appcmd.error; - continue; - } - - /* Check that card supported application commands */ - if (!(appcmd.resp[0] & R1_APP_CMD)) - return MMC_ERR_FAILED; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - memset(cmd->resp, 0, sizeof(cmd->resp)); - cmd->retries = 0; - - mrq.cmd = cmd; - cmd->data = NULL; - - mmc_wait_for_req(host, &mrq); - - err = cmd->error; - if (cmd->error == MMC_ERR_NONE) - break; - } - - return err; -} - -EXPORT_SYMBOL(mmc_wait_for_app_cmd); - -/** * mmc_set_data_timeout - set the timeout for a data command * @data: data phase for command * @card: the MMC card associated with the data transfer @@ -385,60 +316,10 @@ static inline void mmc_set_ios(struct mmc_host *host) host->ops->set_ios(host, ios); } -static int mmc_select_card(struct mmc_card *card) -{ - int err; - struct mmc_command cmd; - - BUG_ON(!card->host->claimed); - - cmd.opcode = MMC_SELECT_CARD; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - return err; - - /* - * We can only change the bus width of SD cards when - * they are selected so we have to put the handling - * here. - * - * The card is in 1 bit mode by default so - * we only need to change if it supports the - * wider version. - */ - if (mmc_card_sd(card) && - (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) && - (card->host->caps & MMC_CAP_4_BIT_DATA)) { - - struct mmc_command cmd; - cmd.opcode = SD_APP_SET_BUS_WIDTH; - cmd.arg = SD_BUS_WIDTH_4; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_app_cmd(card->host, card->rca, - &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - return err; - - card->host->ios.bus_width = MMC_BUS_WIDTH_4; - mmc_set_ios(card->host); - } - - return MMC_ERR_NONE; -} - - -static inline void mmc_delay(unsigned int ms) +void mmc_set_chip_select(struct mmc_host *host, int mode) { - if (ms < 1000 / HZ) { - cond_resched(); - mdelay(ms); - } else { - msleep(ms); - } + host->ios.chip_select = mode; + mmc_set_ios(host); } /* @@ -709,32 +590,6 @@ mmc_alloc_card(struct mmc_host *host, u32 *raw_cid) } /* - * Tell attached cards to go to IDLE state - */ -static void mmc_idle_cards(struct mmc_host *host) -{ - struct mmc_command cmd; - - host->ios.chip_select = MMC_CS_HIGH; - mmc_set_ios(host); - - mmc_delay(1); - - cmd.opcode = MMC_GO_IDLE_STATE; - cmd.arg = 0; - cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; - - mmc_wait_for_cmd(host, &cmd, 0); - - mmc_delay(1); - - host->ios.chip_select = MMC_CS_DONTCARE; - mmc_set_ios(host); - - mmc_delay(1); -} - -/* * Apply power to the MMC stack. This is a two-stage process. * First, we enable power to the card without the clock running. * We then wait a bit for the power to stabilise. Finally, @@ -778,97 +633,6 @@ static void mmc_power_off(struct mmc_host *host) mmc_set_ios(host); } -static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) -{ - struct mmc_command cmd; - int i, err = 0; - - cmd.opcode = MMC_SEND_OP_COND; - cmd.arg = ocr; - cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; - - for (i = 100; i; i--) { - err = mmc_wait_for_cmd(host, &cmd, 0); - if (err != MMC_ERR_NONE) - break; - - if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) - break; - - err = MMC_ERR_TIMEOUT; - - mmc_delay(10); - } - - if (rocr) - *rocr = cmd.resp[0]; - - return err; -} - -static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) -{ - struct mmc_command cmd; - int i, err = 0; - - cmd.opcode = SD_APP_OP_COND; - cmd.arg = ocr; - cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; - - for (i = 100; i; i--) { - err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - break; - - if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) - break; - - err = MMC_ERR_TIMEOUT; - - mmc_delay(10); - } - - if (rocr) - *rocr = cmd.resp[0]; - - return err; -} - -static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2) -{ - struct mmc_command cmd; - int err, sd2; - static const u8 test_pattern = 0xAA; - - /* - * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND - * before SD_APP_OP_COND. This command will harmlessly fail for - * SD 1.0 cards. - */ - cmd.opcode = SD_SEND_IF_COND; - cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern; - cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; - - err = mmc_wait_for_cmd(host, &cmd, 0); - if (err == MMC_ERR_NONE) { - if ((cmd.resp[0] & 0xFF) == test_pattern) { - sd2 = 1; - } else { - sd2 = 0; - err = MMC_ERR_FAILED; - } - } else { - /* - * Treat errors as SD 1.0 card. - */ - sd2 = 0; - err = MMC_ERR_NONE; - } - if (rsd2) - *rsd2 = sd2; - return err; -} - /* * Discover the card by requesting its CID. * @@ -878,27 +642,18 @@ static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2) static void mmc_discover_card(struct mmc_host *host) { unsigned int err; - - struct mmc_command cmd; + u32 cid[4]; BUG_ON(host->card); - cmd.opcode = MMC_ALL_SEND_CID; - cmd.arg = 0; - cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err == MMC_ERR_TIMEOUT) { - err = MMC_ERR_NONE; - return; - } + err = mmc_all_send_cid(host, cid); if (err != MMC_ERR_NONE) { printk(KERN_ERR "%s: error requesting CID: %d\n", mmc_hostname(host), err); return; } - host->card = mmc_alloc_card(host, cmd.resp); + host->card = mmc_alloc_card(host, cid); if (IS_ERR(host->card)) { err = PTR_ERR(host->card); host->card = NULL; @@ -908,16 +663,10 @@ static void mmc_discover_card(struct mmc_host *host) if (host->mode == MMC_MODE_SD) { host->card->type = MMC_TYPE_SD; - cmd.opcode = SD_SEND_RELATIVE_ADDR; - cmd.arg = 0; - cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + err = mmc_send_relative_addr(host, &host->card->rca); if (err != MMC_ERR_NONE) mmc_card_set_dead(host->card); else { - host->card->rca = cmd.resp[0] >> 16; - if (!host->ops->get_ro) { printk(KERN_WARNING "%s: host does not " "support reading read-only " @@ -932,11 +681,7 @@ static void mmc_discover_card(struct mmc_host *host) host->card->type = MMC_TYPE_MMC; host->card->rca = 1; - cmd.opcode = MMC_SET_RELATIVE_ADDR; - cmd.arg = host->card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + err = mmc_set_relative_addr(host->card); if (err != MMC_ERR_NONE) mmc_card_set_dead(host->card); } @@ -944,7 +689,6 @@ static void mmc_discover_card(struct mmc_host *host) static void mmc_read_csd(struct mmc_host *host) { - struct mmc_command cmd; int err; if (!host->card) @@ -952,18 +696,12 @@ static void mmc_read_csd(struct mmc_host *host) if (mmc_card_dead(host->card)) return; - cmd.opcode = MMC_SEND_CSD; - cmd.arg = host->card->rca << 16; - cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + err = mmc_send_csd(host->card, host->card->raw_csd); if (err != MMC_ERR_NONE) { mmc_card_set_dead(host->card); return; } - memcpy(host->card->raw_csd, cmd.resp, sizeof(host->card->raw_csd)); - mmc_decode_csd(host->card); mmc_decode_cid(host->card); } @@ -971,13 +709,7 @@ static void mmc_read_csd(struct mmc_host *host) static void mmc_process_ext_csd(struct mmc_host *host) { int err; - - struct mmc_request mrq; - struct mmc_command cmd; - struct mmc_data data; - u8 *ext_csd; - struct scatterlist sg; if (!host->card) return; @@ -1000,32 +732,8 @@ static void mmc_process_ext_csd(struct mmc_host *host) return; } - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = MMC_SEND_EXT_CSD; - cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, host->card, 0); - - data.blksz = 512; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, ext_csd, 512); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { + err = mmc_send_ext_csd(host->card, ext_csd); + if (err != MMC_ERR_NONE) { if (host->card->csd.capacity == (4096 * 512)) { printk(KERN_ERR "%s: unable to read EXT_CSD " "on a possible high capacity card. " @@ -1066,14 +774,8 @@ static void mmc_process_ext_csd(struct mmc_host *host) if (host->caps & MMC_CAP_MMC_HIGHSPEED) { /* Activate highspeed support. */ - cmd.opcode = MMC_SWITCH; - cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | - (EXT_CSD_HS_TIMING << 16) | - (1 << 8) | - EXT_CSD_CMD_SET_NORMAL; - cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + err = mmc_switch(host->card, MMC_SWITCH_MODE_WRITE_BYTE, + EXT_CSD_HS_TIMING, 1); if (err != MMC_ERR_NONE) { printk("%s: failed to switch card to mmc v4 " "high-speed mode.\n", @@ -1090,14 +792,9 @@ static void mmc_process_ext_csd(struct mmc_host *host) /* Check for host support for wide-bus modes. */ if (host->caps & MMC_CAP_4_BIT_DATA) { /* Activate 4-bit support. */ - cmd.opcode = MMC_SWITCH; - cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | - (EXT_CSD_BUS_WIDTH << 16) | - (EXT_CSD_BUS_WIDTH_4 << 8) | - EXT_CSD_CMD_SET_NORMAL; - cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + err = mmc_switch(host->card, MMC_SWITCH_MODE_WRITE_BYTE, + EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4 | + EXT_CSD_CMD_SET_NORMAL); if (err != MMC_ERR_NONE) { printk("%s: failed to switch card to " "mmc v4 4-bit bus mode.\n", @@ -1116,10 +813,6 @@ out: static void mmc_read_scr(struct mmc_host *host) { int err; - struct mmc_request mrq; - struct mmc_command cmd; - struct mmc_data data; - struct scatterlist sg; if (!host->card) return; @@ -1128,61 +821,19 @@ static void mmc_read_scr(struct mmc_host *host) if (!mmc_card_sd(host->card)) return; - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = MMC_APP_CMD; - cmd.arg = host->card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, 0); - if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) { - mmc_card_set_dead(host->card); - return; - } - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_APP_SEND_SCR; - cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, host->card, 0); - - data.blksz = 1 << 3; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, (u8*)host->card->raw_scr, 8); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { + err = mmc_app_send_scr(host->card, host->card->raw_scr); + if (err != MMC_ERR_NONE) { mmc_card_set_dead(host->card); return; } - host->card->raw_scr[0] = ntohl(host->card->raw_scr[0]); - host->card->raw_scr[1] = ntohl(host->card->raw_scr[1]); - mmc_decode_scr(host->card); } static void mmc_read_switch_caps(struct mmc_host *host) { - struct mmc_request mrq; - struct mmc_command cmd; - struct mmc_data data; + int err; unsigned char *status; - struct scatterlist sg; if (!(host->caps & MMC_CAP_SD_HIGHSPEED)) return; @@ -1204,32 +855,9 @@ static void mmc_read_switch_caps(struct mmc_host *host) return; } - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_SWITCH; - cmd.arg = 0x00FFFFF1; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, host->card, 0); - - data.blksz = 64; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, status, 64); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { + err = mmc_sd_switch(host->card, SD_SWITCH_CHECK, + SD_SWITCH_GRP_ACCESS, SD_SWITCH_ACCESS_HS, status); + if (err != MMC_ERR_NONE) { printk("%s: unable to read switch capabilities, " "performance might suffer.\n", mmc_hostname(host)); @@ -1239,33 +867,9 @@ static void mmc_read_switch_caps(struct mmc_host *host) if (status[13] & 0x02) host->card->sw_caps.hs_max_dtr = 50000000; - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_SWITCH; - cmd.arg = 0x80FFFFF1; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, host->card, 0); - - data.blksz = 64; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, status, 64); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE || - (status[16] & 0xF) != 1) { + err = mmc_sd_switch(host->card, SD_SWITCH_SET, + SD_SWITCH_GRP_ACCESS, SD_SWITCH_ACCESS_HS, status); + if (err != MMC_ERR_NONE || (status[16] & 0xF) != 1) { printk(KERN_WARNING "%s: Problem switching card " "into high-speed mode!\n", mmc_hostname(host)); @@ -1314,16 +918,11 @@ static unsigned int mmc_calculate_clock(struct mmc_host *host) */ static void mmc_check_card(struct mmc_card *card) { - struct mmc_command cmd; int err; BUG_ON(!card); - cmd.opcode = MMC_SEND_STATUS; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES); + err = mmc_send_status(card, NULL); if (err == MMC_ERR_NONE) return; @@ -1338,9 +937,9 @@ static void mmc_setup(struct mmc_host *host) host->mode = MMC_MODE_SD; mmc_power_up(host); - mmc_idle_cards(host); + mmc_go_idle(host); - err = mmc_send_if_cond(host, host->ocr_avail, NULL); + err = mmc_send_if_cond(host, host->ocr_avail); if (err != MMC_ERR_NONE) { return; } @@ -1369,7 +968,7 @@ static void mmc_setup(struct mmc_host *host) * state. We wait 1ms to give cards time to * respond. */ - mmc_idle_cards(host); + mmc_go_idle(host); /* * Send the selected OCR multiple times... until the cards @@ -1377,17 +976,17 @@ static void mmc_setup(struct mmc_host *host) * (My SanDisk card seems to need this.) */ if (host->mode == MMC_MODE_SD) { - int err, sd2; - err = mmc_send_if_cond(host, host->ocr, &sd2); - if (err == MMC_ERR_NONE) { - /* - * If SD_SEND_IF_COND indicates an SD 2.0 - * compliant card and we should set bit 30 - * of the ocr to indicate that we can handle - * block-addressed SDHC cards. - */ - mmc_send_app_op_cond(host, host->ocr | (sd2 << 30), NULL); - } + /* + * If SD_SEND_IF_COND indicates an SD 2.0 + * compliant card and we should set bit 30 + * of the ocr to indicate that we can handle + * block-addressed SDHC cards. + */ + err = mmc_send_if_cond(host, host->ocr); + if (err == MMC_ERR_NONE) + ocr = host->ocr | (1 << 30); + + mmc_send_app_op_cond(host, ocr, NULL); } else { /* The extra bit indicates that we support high capacity */ mmc_send_op_cond(host, host->ocr | (1 << 30), NULL); @@ -1409,6 +1008,24 @@ static void mmc_setup(struct mmc_host *host) mmc_card_set_dead(host->card); } + /* + * The card is in 1 bit mode by default so + * we only need to change if it supports the + * wider version. + */ + if (host->card && !mmc_card_dead(host->card) && + mmc_card_sd(host->card) && + (host->card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) && + (host->card->host->caps & MMC_CAP_4_BIT_DATA)) { + err = mmc_app_set_bus_width(host->card, SD_BUS_WIDTH_4); + if (err != MMC_ERR_NONE) + mmc_card_set_dead(host->card); + else { + host->ios.bus_width = MMC_BUS_WIDTH_4; + mmc_set_ios(host); + } + } + if (host->mode == MMC_MODE_SD) { mmc_read_scr(host); mmc_read_switch_caps(host); |