317 lines
6.3 KiB
C
317 lines
6.3 KiB
C
/*
|
|
* 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 <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 <linux/mmc/sd.h>
|
|
|
|
#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;
|
|
}
|
|
|