![Pierre Ossman](/assets/img/avatar_default.png)
Make sure all headers in the files reflect their true position in the tree. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
277 lines
5 KiB
C
277 lines
5 KiB
C
/*
|
|
* linux/drivers/mmc/core/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 <linux/types.h>
|
|
#include <asm/scatterlist.h>
|
|
#include <linux/scatterlist.h>
|
|
|
|
#include <linux/mmc/host.h>
|
|
#include <linux/mmc/card.h>
|
|
#include <linux/mmc/mmc.h>
|
|
|
|
#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;
|
|
}
|
|
|