Eric Lee / smarc-uboot

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drivers/mmc/mmc_boot.c 3.12 KB
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c40704f4b   Simon Glass   mmc: Move MMC boo... 
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  /*
   * Copyright (C) 2016 Google, Inc
   * Written by Amar <amarendra.xt@samsung.com>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>
  #include <mmc.h>
  #include "mmc_private.h"
  
  /*
   * 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)
  {
  	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) {
  		debug("mmc_boot_partition_size_change: Error1 = %d
  ", err);
  		return err;
  	}
  
  	/* 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) {
  		debug("mmc_boot_partition_size_change: Error2 = %d
  ", err);
  		return err;
  	}
  	/* 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) {
  		debug("mmc_boot_partition_size_change: Error3 = %d
  ", err);
  		return err;
  	}
  	/* 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) {
  		debug("mmc_boot_partition_size_change: Error4 = %d
  ", err);
  		return err;
  	}
  	return 0;
  }
  
  /*
   * 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)
  {
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  	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));
c40704f4b   Simon Glass   mmc: Move MMC boo... 
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  }
  
  /*
   * 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)
  {
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  	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;
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  }
  
  /*
   * 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);
  }