diff options
Diffstat (limited to 'drivers/mmc/mmc_boot.c')
| -rw-r--r-- | drivers/mmc/mmc_boot.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/drivers/mmc/mmc_boot.c b/drivers/mmc/mmc_boot.c new file mode 100644 index 00000000000..986e6c500b1 --- /dev/null +++ b/drivers/mmc/mmc_boot.c @@ -0,0 +1,242 @@ +// 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); +} |