1 /* 2 * Copyright (C) 2016 Google, Inc 3 * Written by Amar <amarendra.xt@samsung.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <mmc.h> 10 #include "mmc_private.h" 11 12 /* 13 * This function changes the size of boot partition and the size of rpmb 14 * partition present on EMMC devices. 15 * 16 * Input Parameters: 17 * struct *mmc: pointer for the mmc device strcuture 18 * bootsize: size of boot partition 19 * rpmbsize: size of rpmb partition 20 * 21 * Returns 0 on success. 22 */ 23 24 int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize, 25 unsigned long rpmbsize) 26 { 27 int err; 28 struct mmc_cmd cmd; 29 30 /* Only use this command for raw EMMC moviNAND. Enter backdoor mode */ 31 cmd.cmdidx = MMC_CMD_RES_MAN; 32 cmd.resp_type = MMC_RSP_R1b; 33 cmd.cmdarg = MMC_CMD62_ARG1; 34 35 err = mmc_send_cmd(mmc, &cmd, NULL); 36 if (err) { 37 debug("mmc_boot_partition_size_change: Error1 = %d\n", err); 38 return err; 39 } 40 41 /* Boot partition changing mode */ 42 cmd.cmdidx = MMC_CMD_RES_MAN; 43 cmd.resp_type = MMC_RSP_R1b; 44 cmd.cmdarg = MMC_CMD62_ARG2; 45 46 err = mmc_send_cmd(mmc, &cmd, NULL); 47 if (err) { 48 debug("mmc_boot_partition_size_change: Error2 = %d\n", err); 49 return err; 50 } 51 /* boot partition size is multiple of 128KB */ 52 bootsize = (bootsize * 1024) / 128; 53 54 /* Arg: boot partition size */ 55 cmd.cmdidx = MMC_CMD_RES_MAN; 56 cmd.resp_type = MMC_RSP_R1b; 57 cmd.cmdarg = bootsize; 58 59 err = mmc_send_cmd(mmc, &cmd, NULL); 60 if (err) { 61 debug("mmc_boot_partition_size_change: Error3 = %d\n", err); 62 return err; 63 } 64 /* RPMB partition size is multiple of 128KB */ 65 rpmbsize = (rpmbsize * 1024) / 128; 66 /* Arg: RPMB partition size */ 67 cmd.cmdidx = MMC_CMD_RES_MAN; 68 cmd.resp_type = MMC_RSP_R1b; 69 cmd.cmdarg = rpmbsize; 70 71 err = mmc_send_cmd(mmc, &cmd, NULL); 72 if (err) { 73 debug("mmc_boot_partition_size_change: Error4 = %d\n", err); 74 return err; 75 } 76 return 0; 77 } 78 79 /* 80 * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH 81 * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH 82 * and BOOT_MODE. 83 * 84 * Returns 0 on success. 85 */ 86 int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode) 87 { 88 return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH, 89 EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) | 90 EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) | 91 EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width)); 92 } 93 94 /* 95 * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG) 96 * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and 97 * PARTITION_ACCESS. 98 * 99 * Returns 0 on success. 100 */ 101 int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access) 102 { 103 int ret; 104 u8 part_conf; 105 106 part_conf = EXT_CSD_BOOT_ACK(ack) | 107 EXT_CSD_BOOT_PART_NUM(part_num) | 108 EXT_CSD_PARTITION_ACCESS(access); 109 110 ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, 111 part_conf); 112 if (!ret) 113 mmc->part_config = part_conf; 114 115 return ret; 116 } 117 118 /* 119 * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value 120 * for enable. Note that this is a write-once field for non-zero values. 121 * 122 * Returns 0 on success. 123 */ 124 int mmc_set_rst_n_function(struct mmc *mmc, u8 enable) 125 { 126 return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION, 127 enable); 128 } 129