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
24int 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 */
86int 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 */
101int 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 */
124int 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