Patrick Georgi | 7333a11 | 2020-05-08 20:48:04 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 2 | |
| 3 | #include <stdio.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <getopt.h> |
| 6 | #include <sys/io.h> |
| 7 | #include <errno.h> |
| 8 | #include <string.h> |
| 9 | #include <unistd.h> |
| 10 | #include <stdint.h> |
| 11 | #include "pmh7tool.h" |
| 12 | |
| 13 | uint8_t pmh7_register_read(uint16_t reg) |
| 14 | { |
| 15 | outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L); |
| 16 | outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H); |
| 17 | return inb(EC_LENOVO_PMH7_DATA); |
| 18 | } |
| 19 | |
| 20 | void pmh7_register_write(uint16_t reg, uint8_t val) |
| 21 | { |
| 22 | outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L); |
| 23 | outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H); |
| 24 | outb(val, EC_LENOVO_PMH7_DATA); |
| 25 | } |
| 26 | |
| 27 | void pmh7_register_set_bit(uint16_t reg, uint8_t bit) |
| 28 | { |
| 29 | uint8_t val; |
| 30 | |
| 31 | val = pmh7_register_read(reg); |
| 32 | pmh7_register_write(reg, val | (1 << bit)); |
| 33 | } |
| 34 | |
| 35 | void pmh7_register_clear_bit(uint16_t reg, uint8_t bit) |
| 36 | { |
| 37 | uint8_t val; |
| 38 | |
| 39 | val = pmh7_register_read(reg); |
| 40 | pmh7_register_write(reg, val & ~(1 << bit)); |
| 41 | } |
| 42 | |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 43 | uint8_t pmh7_register_read_bit(int16_t reg, uint8_t bit) |
| 44 | { |
| 45 | uint8_t val; |
| 46 | |
| 47 | val = pmh7_register_read(reg); |
| 48 | return (val >> bit) & 1; |
| 49 | } |
| 50 | |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 51 | void print_usage(const char *name) |
| 52 | { |
| 53 | printf("usage: %s\n", name); |
| 54 | printf("\n" |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 55 | " -h, --help: print this help\n" |
| 56 | " -d, --dump: print registers\n" |
| 57 | " -w, --write <addr> <data>: write to register\n" |
| 58 | " -r, --read <addr>: read from register\n" |
| 59 | " -b, --read-bit <addr> <bit> read bit\n" |
| 60 | " -c, --clear-bit <addr> <bit> clear bit\n" |
| 61 | " -s, --set-bit <addr> <bit> set bit\n" |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 62 | "\n" |
| 63 | "Attention! Writing to PMH7 registers is very dangerous, as you\n" |
| 64 | " directly manipulate the power rails, enable lines,\n" |
| 65 | " interrupt lines or something else of the device.\n" |
| 66 | " Proceed with caution." |
| 67 | "\n"); |
| 68 | } |
| 69 | |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 70 | enum action {HELP, DUMP, WRITE, READ, READBIT, CLEAR, SET}; |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 71 | |
| 72 | int main(int argc, char *argv[]) |
| 73 | { |
| 74 | enum action act = HELP; |
| 75 | int opt, option_index = 0; |
| 76 | long input_addr = 0, input_data = 0; |
| 77 | |
| 78 | static struct option long_options[] = { |
| 79 | {"help", 0, 0, 'h'}, |
| 80 | {"dump", 0, 0, 'd'}, |
| 81 | {"write", 1, 0, 'w'}, |
| 82 | {"read", 1, 0, 'r'}, |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 83 | {"read-bit", 1, 0, 'b'}, |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 84 | {"clear-bit", 1, 0, 'c'}, |
| 85 | {"set-bit", 1, 0, 's'}, |
| 86 | {0, 0, 0, 0} |
| 87 | }; |
| 88 | |
| 89 | if (argv[1] == NULL) { |
| 90 | print_usage(argv[0]); |
| 91 | exit(0); |
| 92 | } |
| 93 | |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 94 | while ((opt = getopt_long(argc, argv, "hdw:r:c:s:b:", |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 95 | long_options, &option_index)) != EOF) { |
| 96 | switch (opt) { |
| 97 | case 'd': |
| 98 | act = DUMP; |
| 99 | break; |
| 100 | |
| 101 | case 'r': |
| 102 | input_addr = strtoul(optarg, NULL, 16); |
| 103 | act = READ; |
| 104 | break; |
| 105 | |
| 106 | case 'w': |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 107 | case 'b': |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 108 | case 'c': |
| 109 | case 's': |
| 110 | input_addr = strtoul(optarg, NULL, 16); |
| 111 | |
| 112 | if (optind < argc && *argv[optind] != '-') { |
| 113 | input_data = strtoul(argv[optind], NULL, 16); |
| 114 | optind++; |
| 115 | } else { |
| 116 | fprintf(stderr, |
| 117 | "Error: -%c option requires two arguments\n", |
| 118 | opt); |
| 119 | exit(1); |
| 120 | } |
| 121 | |
| 122 | switch (opt) { |
| 123 | case 'w': |
| 124 | act = WRITE; |
| 125 | break; |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 126 | case 'b': |
| 127 | act = READBIT; |
| 128 | break; |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 129 | case 'c': |
| 130 | act = CLEAR; |
| 131 | break; |
| 132 | case 's': |
| 133 | act = SET; |
| 134 | break; |
| 135 | } |
| 136 | break; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | if (optind < argc) { |
| 141 | fprintf(stderr, "Error: Extra parameter found.\n"); |
| 142 | print_usage(argv[0]); |
| 143 | exit(1); |
| 144 | } |
| 145 | |
| 146 | if (act == HELP) { |
| 147 | print_usage(argv[0]); |
| 148 | exit(0); |
| 149 | } |
| 150 | |
| 151 | if (input_addr > 0x1ff) { |
| 152 | fprintf(stderr, |
| 153 | "Error: <addr> cannot be greater than 9 bits long.\n"); |
| 154 | exit(1); |
| 155 | } |
| 156 | |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 157 | if (act == SET || act == CLEAR || act == READBIT) { |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 158 | if (input_data > 7) { |
| 159 | fprintf(stderr, |
| 160 | "Error: <bit> cannot be greater than 7.\n"); |
| 161 | exit(1); |
| 162 | } |
| 163 | } else { |
| 164 | if (input_data > 0xff) { |
| 165 | fprintf(stderr, |
| 166 | "Error: <data> cannot be greater than 8 bits long.\n"); |
| 167 | exit(1); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | if (geteuid() != 0) { |
| 172 | fprintf(stderr, "You must be root.\n"); |
| 173 | exit(1); |
| 174 | } |
| 175 | |
| 176 | if (ioperm(EC_LENOVO_PMH7_BASE, 0x10, 1)) { |
| 177 | fprintf(stderr, "ioperm: %s\n", strerror(errno)); |
| 178 | exit(1); |
| 179 | } |
| 180 | |
| 181 | switch (act) { |
| 182 | case DUMP: |
| 183 | for (int i = 0; i < 0x200; i++) { |
| 184 | if ((i % 0x10) == 0) { |
| 185 | if (i != 0) |
| 186 | printf("\n"); |
| 187 | printf("%04x: ", i); |
| 188 | } |
| 189 | printf("%02x ", pmh7_register_read(i)); |
| 190 | } |
| 191 | printf("\n"); |
| 192 | break; |
| 193 | |
| 194 | case READ: |
| 195 | printf("%02x\n", pmh7_register_read(input_addr)); |
| 196 | break; |
| 197 | |
| 198 | case WRITE: |
| 199 | pmh7_register_write(input_addr, input_data); |
| 200 | break; |
| 201 | |
Evgeny Zinoviev | 672f561 | 2018-08-29 22:24:11 +0300 | [diff] [blame] | 202 | case READBIT: |
| 203 | printf("%d\n", pmh7_register_read_bit(input_addr, input_data)); |
| 204 | break; |
| 205 | |
Evgeny Zinoviev | d54f825 | 2018-08-01 15:53:18 +0300 | [diff] [blame] | 206 | case CLEAR: |
| 207 | pmh7_register_clear_bit(input_addr, input_data); |
| 208 | break; |
| 209 | |
| 210 | case SET: |
| 211 | pmh7_register_set_bit(input_addr, input_data); |
| 212 | break; |
| 213 | |
| 214 | default: |
| 215 | break; |
| 216 | } |
| 217 | |
| 218 | return 0; |
| 219 | } |