Johan RUDHOLM | a8bfde7 | 2012-02-12 11:46:44 -0500 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or |
| 3 | * modify it under the terms of the GNU General Public |
| 4 | * License v2 as published by the Free Software Foundation. |
| 5 | * |
| 6 | * This program is distributed in the hope that it will be useful, |
| 7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 9 | * General Public License for more details. |
| 10 | * |
| 11 | * You should have received a copy of the GNU General Public |
| 12 | * License along with this program; if not, write to the |
| 13 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 14 | * Boston, MA 021110-1307, USA. |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <string.h> |
| 20 | #include <sys/ioctl.h> |
| 21 | #include <sys/types.h> |
| 22 | #include <dirent.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <unistd.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <libgen.h> |
| 27 | #include <limits.h> |
Johan RUDHOLM | a8bfde7 | 2012-02-12 11:46:44 -0500 | [diff] [blame] | 28 | #include <ctype.h> |
| 29 | |
| 30 | #include "mmc.h" |
| 31 | #include "mmc_cmds.h" |
| 32 | |
| 33 | int read_extcsd(int fd, __u8 *ext_csd) |
| 34 | { |
| 35 | int ret = 0; |
| 36 | struct mmc_ioc_cmd idata; |
| 37 | memset(&idata, 0, sizeof(idata)); |
| 38 | memset(ext_csd, 0, sizeof(__u8) * 512); |
| 39 | idata.write_flag = 0; |
| 40 | idata.opcode = MMC_SEND_EXT_CSD; |
| 41 | idata.arg = 0; |
| 42 | idata.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 43 | idata.blksz = 512; |
| 44 | idata.blocks = 1; |
| 45 | mmc_ioc_cmd_set_data(idata, ext_csd); |
| 46 | |
| 47 | ret = ioctl(fd, MMC_IOC_CMD, &idata); |
| 48 | if (ret) |
| 49 | perror("ioctl"); |
| 50 | |
| 51 | return ret; |
| 52 | } |
| 53 | |
| 54 | int write_extcsd_value(int fd, __u8 index, __u8 value) |
| 55 | { |
| 56 | int ret = 0; |
| 57 | struct mmc_ioc_cmd idata; |
| 58 | |
| 59 | memset(&idata, 0, sizeof(idata)); |
| 60 | idata.write_flag = 1; |
| 61 | idata.opcode = MMC_SWITCH; |
| 62 | idata.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | |
| 63 | (index << 16) | |
| 64 | (value << 8) | |
| 65 | EXT_CSD_CMD_SET_NORMAL; |
| 66 | idata.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
| 67 | |
| 68 | ret = ioctl(fd, MMC_IOC_CMD, &idata); |
| 69 | if (ret) |
| 70 | perror("ioctl"); |
| 71 | |
| 72 | return ret; |
| 73 | } |
| 74 | |
| 75 | int do_read_extcsd(int nargs, char **argv) |
| 76 | { |
| 77 | __u8 ext_csd[512]; |
| 78 | int fd, ret; |
| 79 | char *device; |
| 80 | |
| 81 | CHECK(nargs != 2, "Usage: mmc </path/to/mmcblkX>\n", exit(1)); |
| 82 | |
| 83 | device = argv[1]; |
| 84 | |
| 85 | fd = open(device, O_RDWR); |
| 86 | if (fd < 0) { |
| 87 | perror("open"); |
| 88 | exit(1); |
| 89 | } |
| 90 | |
| 91 | ret = read_extcsd(fd, ext_csd); |
| 92 | if (ret) { |
| 93 | fprintf(stderr, "Could not read EXT_CSD from %s\n", device); |
| 94 | exit(1); |
| 95 | } |
| 96 | |
| 97 | printf("Power ro locking: "); |
| 98 | if (ext_csd[EXT_CSD_BOOT_WP] & EXT_CSD_BOOT_WP_B_PWR_WP_DIS) |
| 99 | printf("not possible\n"); |
| 100 | else |
| 101 | printf("possible\n"); |
| 102 | |
| 103 | printf("Permanent ro locking: "); |
| 104 | if (ext_csd[EXT_CSD_BOOT_WP] & EXT_CSD_BOOT_WP_B_PERM_WP_DIS) |
| 105 | printf("not possible\n"); |
| 106 | else |
| 107 | printf("possible\n"); |
| 108 | |
| 109 | printf("ro lock status: "); |
| 110 | if (ext_csd[EXT_CSD_BOOT_WP] & EXT_CSD_BOOT_WP_B_PWR_WP_EN) |
| 111 | printf("locked until next power on\n"); |
| 112 | else if (ext_csd[EXT_CSD_BOOT_WP] & |
| 113 | EXT_CSD_BOOT_WP_B_PERM_WP_EN) |
| 114 | printf("locked permanently\n"); |
| 115 | else |
| 116 | printf("not locked\n"); |
| 117 | |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | int do_write_extcsd(int nargs, char **argv) |
| 122 | { |
| 123 | __u8 ext_csd[512], value; |
| 124 | int fd, ret; |
| 125 | char *device; |
| 126 | |
| 127 | if (nargs != 2) { |
| 128 | fprintf (stderr, "Usage: %s </path/to/mmcblkX>\n", |
| 129 | argv[0]); |
| 130 | exit (1); |
| 131 | } |
| 132 | device = argv[1]; |
| 133 | |
| 134 | fd = open(device, O_RDWR); |
| 135 | if (fd < 0) { |
| 136 | perror("open"); |
| 137 | exit(1); |
| 138 | } |
| 139 | |
| 140 | ret = read_extcsd(fd, ext_csd); |
| 141 | if (ret) { |
| 142 | fprintf(stderr, "Could not read EXT_CSD from %s\n", device); |
| 143 | exit(1); |
| 144 | } |
| 145 | |
| 146 | value = ext_csd[EXT_CSD_BOOT_WP] | |
| 147 | EXT_CSD_BOOT_WP_B_PWR_WP_EN; |
| 148 | ret = write_extcsd_value(fd, EXT_CSD_BOOT_WP, value); |
| 149 | if (ret) { |
| 150 | fprintf(stderr, "Could not write 0x%02x to " |
| 151 | "EXT_CSD[%d] in %s\n", |
| 152 | value, EXT_CSD_BOOT_WP, device); |
| 153 | exit(1); |
| 154 | } |
| 155 | |
| 156 | return ret; |
| 157 | } |