diff options
| -rw-r--r-- | Makefile | 38 | ||||
| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | pmh7tool.c | 214 | ||||
| -rw-r--r-- | pmh7tool.h | 29 |
4 files changed, 283 insertions, 0 deletions
diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..091fbc5 --- /dev/null +++ b/Makefile @@ -0,0 +1,38 @@ +## +## Makefile for pmh7tool +## +## Copyright (C) 2018 Evgeny Zinoviev <me@ch1p.com> +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; version 2 of the License. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## + +CC = gcc +CFLAGS = -O2 -Wall -W -Werror +PROGRAM = pmh7tool +INSTALL = /usr/bin/install +PREFIX = /usr/local + +all: $(PROGRAM) + +$(PROGRAM): pmh7tool.o + $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) + +install: $(PROGRAM) + $(INSTALL) $(PROGRAM) $(PREFIX)/sbin + +clean: + rm -f *.o $(PROGRAM) + +distclean: clean + +%.o: %.c + $(CC) $(CFLAGS) -c $^ -I. -o $@ + +.PHONY: all install clean distclean diff --git a/README.md b/README.md new file mode 100644 index 0000000..a0120ec --- /dev/null +++ b/README.md @@ -0,0 +1,2 @@ +# pmh7tool +# pmh7tool diff --git a/pmh7tool.c b/pmh7tool.c new file mode 100644 index 0000000..d0c652e --- /dev/null +++ b/pmh7tool.c @@ -0,0 +1,214 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2018 Evgeny Zinoviev <me@ch1p.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <getopt.h> +#include <sys/io.h> +#include <errno.h> +#include <string.h> +#include <unistd.h> +#include <stdint.h> +#include "pmh7tool.h" + +uint8_t pmh7_register_read(uint16_t reg) +{ + outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L); + outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H); + return inb(EC_LENOVO_PMH7_DATA); +} + +void pmh7_register_write(uint16_t reg, uint8_t val) +{ + outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L); + outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H); + outb(val, EC_LENOVO_PMH7_DATA); +} + +void pmh7_register_set_bit(uint16_t reg, uint8_t bit) +{ + uint8_t val; + + val = pmh7_register_read(reg); + pmh7_register_write(reg, val | (1 << bit)); +} + +void pmh7_register_clear_bit(uint16_t reg, uint8_t bit) +{ + uint8_t val; + + val = pmh7_register_read(reg); + pmh7_register_write(reg, val & ~(1 << bit)); +} + +void print_usage(const char *name) +{ + printf("usage: %s\n", name); + printf("\n" + " -h, --help: print this help\n" + " -d, --dump: print registers\n" + " -w, --write <addr> <data>: write to register\n" + " -r, --read <addr>: read from register\n" + " -c, --clear-bit <addr> <bit>\n" + " -s, --set-bit <addr> <bit>\n" + "\n" + "Attention! Writing to PMH7 registers is very dangerous, as you\n" + " directly manipulate the power rails, enable lines,\n" + " interrupt lines or something else of the device.\n" + " Proceed with caution." + "\n"); +} + +enum action {HELP, DUMP, WRITE, READ, CLEAR, SET}; + +int main(int argc, char *argv[]) +{ + enum action act = HELP; + int opt, option_index = 0; + long input_addr = 0, input_data = 0; + + static struct option long_options[] = { + {"help", 0, 0, 'h'}, + {"dump", 0, 0, 'd'}, + {"write", 1, 0, 'w'}, + {"read", 1, 0, 'r'}, + {"clear-bit", 1, 0, 'c'}, + {"set-bit", 1, 0, 's'}, + {0, 0, 0, 0} + }; + + if (argv[1] == NULL) { + print_usage(argv[0]); + exit(0); + } + + while ((opt = getopt_long(argc, argv, "hdw:r:c:s:", + long_options, &option_index)) != EOF) { + switch (opt) { + case 'd': + act = DUMP; + break; + + case 'r': + input_addr = strtoul(optarg, NULL, 16); + act = READ; + break; + + case 'w': + case 'c': + case 's': + input_addr = strtoul(optarg, NULL, 16); + + if (optind < argc && *argv[optind] != '-') { + input_data = strtoul(argv[optind], NULL, 16); + optind++; + } else { + fprintf(stderr, + "Error: -%c option requires two arguments\n", + opt); + exit(1); + } + + switch (opt) { + case 'w': + act = WRITE; + break; + case 'c': + act = CLEAR; + break; + case 's': + act = SET; + break; + } + break; + } + } + + if (optind < argc) { + fprintf(stderr, "Error: Extra parameter found.\n"); + print_usage(argv[0]); + exit(1); + } + + if (act == HELP) { + print_usage(argv[0]); + exit(0); + } + + if (input_addr > 0x1ff) { + fprintf(stderr, + "Error: <addr> cannot be greater than 9 bits long.\n"); + exit(1); + } + + if (act == SET || act == CLEAR) { + if (input_data > 7) { + fprintf(stderr, + "Error: <bit> cannot be greater than 7.\n"); + exit(1); + } + } else { + if (input_data > 0xff) { + fprintf(stderr, + "Error: <data> cannot be greater than 8 bits long.\n"); + exit(1); + } + } + + if (geteuid() != 0) { + fprintf(stderr, "You must be root.\n"); + exit(1); + } + + if (ioperm(EC_LENOVO_PMH7_BASE, 0x10, 1)) { + fprintf(stderr, "ioperm: %s\n", strerror(errno)); + exit(1); + } + + switch (act) { + case DUMP: + for (int i = 0; i < 0x200; i++) { + if ((i % 0x10) == 0) { + if (i != 0) + printf("\n"); + printf("%04x: ", i); + } + printf("%02x ", pmh7_register_read(i)); + } + printf("\n"); + break; + + case READ: + printf("%02x\n", pmh7_register_read(input_addr)); + break; + + case WRITE: + pmh7_register_write(input_addr, input_data); + break; + + case CLEAR: + pmh7_register_clear_bit(input_addr, input_data); + break; + + case SET: + pmh7_register_set_bit(input_addr, input_data); + break; + + default: + break; + } + + return 0; +} diff --git a/pmh7tool.h b/pmh7tool.h new file mode 100644 index 0000000..37d5027 --- /dev/null +++ b/pmh7tool.h @@ -0,0 +1,29 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2018 Evgeny Zinoviev <me@ch1p.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef PMH7TOOL_H +#define PMH7TOOL_H + +#define EC_LENOVO_PMH7_BASE 0x15e0 +#define EC_LENOVO_PMH7_ADDR_L (EC_LENOVO_PMH7_BASE + 0x0c) +#define EC_LENOVO_PMH7_ADDR_H (EC_LENOVO_PMH7_BASE + 0x0d) +#define EC_LENOVO_PMH7_DATA (EC_LENOVO_PMH7_BASE + 0x0e) + +uint8_t pmh7_register_read(uint16_t reg); +void pmh7_register_write(uint16_t reg, uint8_t val); +void pmh7_register_set_bit(uint16_t reg, uint8_t bit); +void pmh7_register_clear_bit(uint16_t reg, uint8_t bit); + +#endif /* PMH7TOOL_H */ |