From da7fbe58d2d347e95af699ddf04d885be6362bbe Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Sun, 24 Dec 2006 22:46:55 +0100 Subject: 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 --- drivers/mmc/core/Makefile | 2 +- drivers/mmc/core/core.c | 511 ++++++--------------------------------------- drivers/mmc/core/core.h | 32 +-- drivers/mmc/core/mmc_ops.c | 276 ++++++++++++++++++++++++ drivers/mmc/core/mmc_ops.h | 27 +++ drivers/mmc/core/sd_ops.c | 316 ++++++++++++++++++++++++++++ drivers/mmc/core/sd_ops.h | 25 +++ drivers/mmc/core/sysfs.c | 2 +- drivers/mmc/core/sysfs.h | 27 +++ 9 files changed, 756 insertions(+), 462 deletions(-) create mode 100644 drivers/mmc/core/mmc_ops.c create mode 100644 drivers/mmc/core/mmc_ops.h create mode 100644 drivers/mmc/core/sd_ops.c create mode 100644 drivers/mmc/core/sd_ops.h create mode 100644 drivers/mmc/core/sysfs.h (limited to 'drivers/mmc/core') 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 ($(CONFIG_MMC_DEBUG),y) endif obj-$(CONFIG_MMC) += mmc_core.o -mmc_core-y := core.o sysfs.o +mmc_core-y := core.o sysfs.o mmc_ops.o sd_ops.o 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 @@ #include #include -#include +#include +#include #include "core.h" +#include "sysfs.h" + +#include "mmc_ops.h" +#include "sd_ops.h" #define CMD_RETRIES 3 @@ -190,80 +195,6 @@ 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 @@ -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); } /* @@ -708,32 +589,6 @@ mmc_alloc_card(struct mmc_host *host, u32 *raw_cid) return card; } -/* - * 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. @@ -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); 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 @@ * linux/drivers/mmc/core/core.h * * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2007 Pierre Ossman * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ -#ifndef _MMC_CORE_H -#define _MMC_CORE_H -/* core-internal functions */ -void mmc_init_card(struct mmc_card *card, struct mmc_host *host); -int mmc_register_card(struct mmc_card *card); -void mmc_remove_card(struct mmc_card *card); +#ifndef _MMC_CORE_CORE_H +#define _MMC_CORE_CORE_H -struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev); -int mmc_add_host_sysfs(struct mmc_host *host); -void mmc_remove_host_sysfs(struct mmc_host *host); -void mmc_free_host_sysfs(struct mmc_host *host); +#include + +#define MMC_CMD_RETRIES 3 + +void mmc_set_chip_select(struct mmc_host *host, int mode); + +static inline void mmc_delay(unsigned int ms) +{ + if (ms < 1000 / HZ) { + cond_resched(); + mdelay(ms); + } else { + msleep(ms); + } +} -int mmc_schedule_work(struct work_struct *work); -int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay); -void mmc_flush_scheduled_work(void); #endif + 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 @@ +/* + * linux/drivers/mmc/mmc_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include +#include +#include + +#include +#include +#include + +#include "core.h" +#include "mmc_ops.h" + +static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SELECT_CARD; + + if (card) { + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + } else { + cmd.arg = 0; + cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; + } + + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_select_card(struct mmc_card *card) +{ + BUG_ON(!card); + + return _mmc_select_card(card->host, card); +} + +int mmc_deselect_cards(struct mmc_host *host) +{ + return _mmc_select_card(host, NULL); +} + +int mmc_go_idle(struct mmc_host *host) +{ + int err; + struct mmc_command cmd; + + mmc_set_chip_select(host, MMC_CS_HIGH); + + mmc_delay(1); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_GO_IDLE_STATE; + cmd.arg = 0; + cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; + + err = mmc_wait_for_cmd(host, &cmd, 0); + + mmc_delay(1); + + mmc_set_chip_select(host, MMC_CS_DONTCARE); + + mmc_delay(1); + + return err; +} + +int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) +{ + struct mmc_command cmd; + int i, err = 0; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + 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; +} + +int mmc_all_send_cid(struct mmc_host *host, u32 *cid) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + BUG_ON(!cid); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_ALL_SEND_CID; + cmd.arg = 0; + cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; + + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + memcpy(cid, cmd.resp, sizeof(u32) * 4); + + return MMC_ERR_NONE; +} + +int mmc_set_relative_addr(struct mmc_card *card) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SET_RELATIVE_ADDR; + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_send_csd(struct mmc_card *card, u32 *csd) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + BUG_ON(!csd); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SEND_CSD; + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + memcpy(csd, cmd.resp, sizeof(u32) * 4); + + return MMC_ERR_NONE; +} + +int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) +{ + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(!card->host); + BUG_ON(!ext_csd); + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = MMC_SEND_EXT_CSD; + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = 512; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, ext_csd, 512); + + mmc_set_data_timeout(&data, card, 0); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error != MMC_ERR_NONE) + return cmd.error; + if (data.error != MMC_ERR_NONE) + return data.error; + + return MMC_ERR_NONE; +} + +int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SWITCH; + cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (index << 16) | + (value << 8) | + set; + cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_send_status(struct mmc_card *card, u32 *status) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + 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, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + if (status) + *status = cmd.resp[0]; + + return MMC_ERR_NONE; +} + 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 @@ +/* + * linux/drivers/mmc/mmc_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef _MMC_MMC_OPS_H +#define _MMC_MMC_OPS_H + +int mmc_select_card(struct mmc_card *card); +int mmc_deselect_cards(struct mmc_host *host); +int mmc_go_idle(struct mmc_host *host); +int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); +int mmc_all_send_cid(struct mmc_host *host, u32 *cid); +int mmc_set_relative_addr(struct mmc_card *card); +int mmc_send_csd(struct mmc_card *card, u32 *csd); +int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd); +int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value); +int mmc_send_status(struct mmc_card *card, u32 *status); + +#endif + 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 @@ +/* + * linux/drivers/mmc/sd_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include +#include +#include + +#include +#include +#include +#include + +#include "core.h" +#include "sd_ops.h" + +/** + * 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, struct mmc_card *card, + struct mmc_command *cmd, int retries) +{ + struct mmc_request mrq; + + int i, err; + + BUG_ON(!cmd); + 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)); + + err = mmc_app_cmd(host, card); + if (err != MMC_ERR_NONE) + continue; + + 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); + +int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + BUG_ON(card && (card->host != host)); + + cmd.opcode = MMC_APP_CMD; + + if (card) { + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + } else { + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR; + } + + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err != MMC_ERR_NONE) + return err; + + /* Check that card supported application commands */ + if (!(cmd.resp[0] & R1_APP_CMD)) + return MMC_ERR_FAILED; + + return MMC_ERR_NONE; +} + +int mmc_app_set_bus_width(struct mmc_card *card, int width) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_APP_SET_BUS_WIDTH; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + + switch (width) { + case MMC_BUS_WIDTH_1: + cmd.arg = SD_BUS_WIDTH_1; + break; + case MMC_BUS_WIDTH_4: + cmd.arg = SD_BUS_WIDTH_4; + break; + default: + return MMC_ERR_INVALID; + } + + err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) +{ + struct mmc_command cmd; + int i, err = 0; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + 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, NULL, &cmd, MMC_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; +} + +int mmc_send_if_cond(struct mmc_host *host, u32 ocr) +{ + struct mmc_command cmd; + int err; + 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) + return err; + + if ((cmd.resp[0] & 0xFF) != test_pattern) + return MMC_ERR_FAILED; + + return MMC_ERR_NONE; +} + +int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + BUG_ON(!rca); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_SEND_RELATIVE_ADDR; + cmd.arg = 0; + cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; + + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + *rca = cmd.resp[0] >> 16; + + return MMC_ERR_NONE; +} + +int mmc_app_send_scr(struct mmc_card *card, u32 *scr) +{ + int err; + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(!card->host); + BUG_ON(!scr); + + err = mmc_app_cmd(card->host, card); + if (err != MMC_ERR_NONE) + return err; + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = SD_APP_SEND_SCR; + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = 8; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, scr, 8); + + mmc_set_data_timeout(&data, card, 0); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error != MMC_ERR_NONE) + return cmd.error; + if (data.error != MMC_ERR_NONE) + return data.error; + + scr[0] = ntohl(scr[0]); + scr[1] = ntohl(scr[1]); + + return MMC_ERR_NONE; +} + +int mmc_sd_switch(struct mmc_card *card, int mode, int group, + u8 value, u8 *resp) +{ + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(!card->host); + + mode = !!mode; + value &= 0xF; + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = SD_SWITCH; + cmd.arg = mode << 31 | 0x00FFFFFF; + cmd.arg &= ~(0xF << (group * 4)); + cmd.arg |= value << (group * 4); + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = 64; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, resp, 64); + + mmc_set_data_timeout(&data, card, 0); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error != MMC_ERR_NONE) + return cmd.error; + if (data.error != MMC_ERR_NONE) + return data.error; + + return MMC_ERR_NONE; +} + 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 @@ +/* + * linux/drivers/mmc/sd_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef _MMC_SD_OPS_H +#define _MMC_SD_OPS_H + +int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card); +int mmc_app_set_bus_width(struct mmc_card *card, int width); +int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); +int mmc_send_if_cond(struct mmc_host *host, u32 ocr); +int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca); +int mmc_app_send_scr(struct mmc_card *card, u32 *scr); +int mmc_sd_switch(struct mmc_card *card, int mode, int group, + u8 value, u8 *resp); + +#endif + 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 @@ #include #include -#include "core.h" +#include "sysfs.h" #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) #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 @@ +/* + * linux/drivers/mmc/core/sysfs.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _MMC_CORE_SYSFS_H +#define _MMC_CORE_SYSFS_H + +void mmc_init_card(struct mmc_card *card, struct mmc_host *host); +int mmc_register_card(struct mmc_card *card); +void mmc_remove_card(struct mmc_card *card); + +struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev); +int mmc_add_host_sysfs(struct mmc_host *host); +void mmc_remove_host_sysfs(struct mmc_host *host); +void mmc_free_host_sysfs(struct mmc_host *host); + +int mmc_schedule_work(struct work_struct *work); +int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay); +void mmc_flush_scheduled_work(void); + +#endif -- cgit v1.2.3