/*
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* Copyright (C) 2016 Google, Inc
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* Written by Amar <amarendra.xt@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <mmc.h>
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#include "mmc_private.h"
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/*
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* This function changes the size of boot partition and the size of rpmb
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* partition present on EMMC devices.
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*
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* Input Parameters:
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* struct *mmc: pointer for the mmc device strcuture
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* bootsize: size of boot partition
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* rpmbsize: size of rpmb partition
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*
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* Returns 0 on success.
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*/
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int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
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unsigned long rpmbsize)
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{
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int err;
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struct mmc_cmd cmd;
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/* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
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cmd.cmdidx = MMC_CMD_RES_MAN;
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cmd.resp_type = MMC_RSP_R1b;
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cmd.cmdarg = MMC_CMD62_ARG1;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err) {
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debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
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return err;
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}
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/* Boot partition changing mode */
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cmd.cmdidx = MMC_CMD_RES_MAN;
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cmd.resp_type = MMC_RSP_R1b;
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cmd.cmdarg = MMC_CMD62_ARG2;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err) {
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debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
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return err;
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}
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/* boot partition size is multiple of 128KB */
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bootsize = (bootsize * 1024) / 128;
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/* Arg: boot partition size */
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cmd.cmdidx = MMC_CMD_RES_MAN;
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cmd.resp_type = MMC_RSP_R1b;
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cmd.cmdarg = bootsize;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err) {
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debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
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return err;
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}
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/* RPMB partition size is multiple of 128KB */
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rpmbsize = (rpmbsize * 1024) / 128;
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/* Arg: RPMB partition size */
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cmd.cmdidx = MMC_CMD_RES_MAN;
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cmd.resp_type = MMC_RSP_R1b;
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cmd.cmdarg = rpmbsize;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err) {
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debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
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return err;
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}
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return 0;
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}
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/*
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* Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
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* based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
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* and BOOT_MODE.
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*
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* Returns 0 on success.
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*/
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int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
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{
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return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
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EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
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EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
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EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
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}
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/*
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* Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
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* based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
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* PARTITION_ACCESS.
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*
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* Returns 0 on success.
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*/
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int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
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{
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int ret;
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u8 part_conf;
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part_conf = EXT_CSD_BOOT_ACK(ack) |
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EXT_CSD_BOOT_PART_NUM(part_num) |
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EXT_CSD_PARTITION_ACCESS(access);
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ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
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part_conf);
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if (!ret)
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mmc->part_config = part_conf;
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return ret;
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}
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/*
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* Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
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* for enable. Note that this is a write-once field for non-zero values.
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*
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* Returns 0 on success.
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*/
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int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
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{
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return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
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enable);
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}
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