]>
git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/mmc/mmc_boot.c
2 * Copyright (C) 2016 Google, Inc
3 * Written by Amar <amarendra.xt@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
10 #include "mmc_private.h"
13 * This function changes the size of boot partition and the size of rpmb
14 * partition present on EMMC devices.
17 * struct *mmc: pointer for the mmc device strcuture
18 * bootsize: size of boot partition
19 * rpmbsize: size of rpmb partition
21 * Returns 0 on success.
24 int mmc_boot_partition_size_change(struct mmc
*mmc
, unsigned long bootsize
,
25 unsigned long rpmbsize
)
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
;
35 err
= mmc_send_cmd(mmc
, &cmd
, NULL
);
37 debug("mmc_boot_partition_size_change: Error1 = %d\n", err
);
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
;
46 err
= mmc_send_cmd(mmc
, &cmd
, NULL
);
48 debug("mmc_boot_partition_size_change: Error2 = %d\n", err
);
51 /* boot partition size is multiple of 128KB */
52 bootsize
= (bootsize
* 1024) / 128;
54 /* Arg: boot partition size */
55 cmd
.cmdidx
= MMC_CMD_RES_MAN
;
56 cmd
.resp_type
= MMC_RSP_R1b
;
57 cmd
.cmdarg
= bootsize
;
59 err
= mmc_send_cmd(mmc
, &cmd
, NULL
);
61 debug("mmc_boot_partition_size_change: Error3 = %d\n", err
);
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
;
71 err
= mmc_send_cmd(mmc
, &cmd
, NULL
);
73 debug("mmc_boot_partition_size_change: Error4 = %d\n", err
);
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
84 * Returns 0 on success.
86 int mmc_set_boot_bus_width(struct mmc
*mmc
, u8 width
, u8 reset
, u8 mode
)
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
));
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
99 * Returns 0 on success.
101 int mmc_set_part_conf(struct mmc
*mmc
, u8 ack
, u8 part_num
, u8 access
)
106 part_conf
= EXT_CSD_BOOT_ACK(ack
) |
107 EXT_CSD_BOOT_PART_NUM(part_num
) |
108 EXT_CSD_PARTITION_ACCESS(access
);
110 ret
= mmc_switch(mmc
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_PART_CONF
,
113 mmc
->part_config
= part_conf
;
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.
122 * Returns 0 on success.
124 int mmc_set_rst_n_function(struct mmc
*mmc
, u8 enable
)
126 return mmc_switch(mmc
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_RST_N_FUNCTION
,