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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Google, Inc
* Written by Amar <amarendra.xt@samsung.com>
*/
#include <log.h>
#include <mmc.h>
#include "mmc_private.h"
static int mmc_resize_boot_micron(struct mmc *mmc, unsigned long bootsize,
unsigned long rpmbsize)
{
int err;
/* Micron eMMC doesn't support resizing RPMB partition */
(void)rpmbsize;
/* BOOT partition size is multiple of 128KB */
bootsize = (bootsize * 1024) / 128;
if (bootsize > 0xff)
bootsize = 0xff;
/* Set EXT_CSD[175] ERASE_GROUP_DEF to 0x01 */
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GROUP_DEF, 0x01);
if (err)
goto error;
/* Set EXT_CSD[127:125] for BOOT partition size, [125] is low byte */
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BOOT_SIZE_MULT_MICRON, bootsize);
if (err)
goto error;
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BOOT_SIZE_MULT_MICRON + 1, 0x00);
if (err)
goto error;
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BOOT_SIZE_MULT_MICRON + 2, 0x00);
if (err)
goto error;
/* Set EXT_CSD[155] PARTITION_SETTING_COMPLETE to 0x01 */
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PARTITION_SETTING, 0x01);
if (err)
goto error;
return 0;
error:
debug("%s: Error = %d\n", __func__, err);
return err;
}
static int mmc_resize_boot_sandisk(struct mmc *mmc, unsigned long bootsize,
unsigned long rpmbsize)
{
int err;
struct mmc_cmd cmd;
/* BOOT/RPMB partition size is multiple of 128KB */
bootsize = (bootsize * 1024) / 128;
rpmbsize = (rpmbsize * 1024) / 128;
if (bootsize > 0xff)
bootsize = 0xff;
if (rpmbsize > 0xff)
rpmbsize = 0xff;
/* Send BOOT/RPMB resize op code */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = MMC_CMD62_ARG_SANDISK;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
/* Arg: BOOT partition size */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = bootsize;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
/* Arg: RPMB partition size */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = rpmbsize;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
return 0;
error:
debug("%s: Error = %d\n", __func__, err);
return err;
}
static int mmc_resize_boot_samsung(struct mmc *mmc, unsigned long bootsize,
unsigned long rpmbsize)
{
int err;
struct mmc_cmd cmd;
/* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = MMC_CMD62_ARG1;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
/* Boot partition changing mode */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = MMC_CMD62_ARG2;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
/* boot partition size is multiple of 128KB */
bootsize = (bootsize * 1024) / 128;
/* Arg: boot partition size */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = bootsize;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
/* RPMB partition size is multiple of 128KB */
rpmbsize = (rpmbsize * 1024) / 128;
/* Arg: RPMB partition size */
cmd.cmdidx = MMC_CMD_RES_MAN;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = rpmbsize;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
goto error;
return 0;
error:
debug("%s: Error = %d\n", __func__, err);
return err;
}
/*
* This function changes the size of BOOT partition and the size of RPMB
* partition present on eMMC devices.
*
* Input Parameters:
* struct *mmc: pointer for the mmc device strcuture
* bootsize: size of BOOT partition
* rpmbsize: size of RPMB partition
*
* Returns 0 on success.
*/
int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
unsigned long rpmbsize)
{
switch (mmc->cid[0] >> 24) {
case CID_MANFID_MICRON:
return mmc_resize_boot_micron(mmc, bootsize, rpmbsize);
case CID_MANFID_SAMSUNG:
return mmc_resize_boot_samsung(mmc, bootsize, rpmbsize);
case CID_MANFID_SANDISK:
return mmc_resize_boot_sandisk(mmc, bootsize, rpmbsize);
default:
printf("Unsupported manufacturer id 0x%02x\n",
mmc->cid[0] >> 24);
return -EPERM;
}
}
/*
* Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
* based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
* and BOOT_MODE.
*
* Returns 0 on success.
*/
int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
{
return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
}
/*
* Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
* based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
* PARTITION_ACCESS.
*
* Returns 0 on success.
*/
int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
{
int ret;
u8 part_conf;
part_conf = EXT_CSD_BOOT_ACK(ack) |
EXT_CSD_BOOT_PART_NUM(part_num) |
EXT_CSD_PARTITION_ACCESS(access);
ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
part_conf);
if (!ret)
mmc->part_config = part_conf;
return ret;
}
/*
* Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
* for enable. Note that this is a write-once field for non-zero values.
*
* Returns 0 on success.
*/
int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
{
return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
enable);
}
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