1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Google, Inc
4 * Written by Amar <amarendra.xt@samsung.com>
5 */
6
7 #include <common.h>
8 #include <log.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
mmc_boot_partition_size_change(struct mmc * mmc,unsigned long bootsize,unsigned long rpmbsize)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 */
mmc_set_boot_bus_width(struct mmc * mmc,u8 width,u8 reset,u8 mode)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 */
mmc_set_part_conf(struct mmc * mmc,u8 ack,u8 part_num,u8 access)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 */
mmc_set_rst_n_function(struct mmc * mmc,u8 enable)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