util/pmh7tool: Add tool to dump PMH7 registers
Change-Id: I05ccb5a9a861fe44efec794aafe1805062543d53 Signed-off-by: Evgeny Zinoviev <me@ch1p.com> Reviewed-on: https://review.coreboot.org/27776 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Evgeny Zinoviev
Felix Held
parent
289e6ce252
commit
d54f825ed1
3 changed files with 281 additions and 0 deletions
38
util/pmh7tool/Makefile
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38
util/pmh7tool/Makefile
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##
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## Makefile for pmh7tool
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##
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## Copyright (C) 2018 Evgeny Zinoviev <me@ch1p.com>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; version 2 of the License.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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CC = gcc
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CFLAGS = -O2 -Wall -W -Werror
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PROGRAM = pmh7tool
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INSTALL = /usr/bin/install
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PREFIX = /usr/local
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all: $(PROGRAM)
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$(PROGRAM): pmh7tool.o
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$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
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install: $(PROGRAM)
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$(INSTALL) $(PROGRAM) $(PREFIX)/sbin
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clean:
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rm -f *.o $(PROGRAM)
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distclean: clean
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%.o: %.c
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$(CC) $(CFLAGS) -c $^ -I. -o $@
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.PHONY: all install clean distclean
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214
util/pmh7tool/pmh7tool.c
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214
util/pmh7tool/pmh7tool.c
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2018 Evgeny Zinoviev <me@ch1p.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <sys/io.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdint.h>
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#include "pmh7tool.h"
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uint8_t pmh7_register_read(uint16_t reg)
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{
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outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L);
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outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H);
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return inb(EC_LENOVO_PMH7_DATA);
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}
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void pmh7_register_write(uint16_t reg, uint8_t val)
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{
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outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L);
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outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H);
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outb(val, EC_LENOVO_PMH7_DATA);
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}
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void pmh7_register_set_bit(uint16_t reg, uint8_t bit)
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{
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uint8_t val;
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val = pmh7_register_read(reg);
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pmh7_register_write(reg, val | (1 << bit));
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}
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void pmh7_register_clear_bit(uint16_t reg, uint8_t bit)
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{
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uint8_t val;
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val = pmh7_register_read(reg);
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pmh7_register_write(reg, val & ~(1 << bit));
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}
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void print_usage(const char *name)
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{
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printf("usage: %s\n", name);
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printf("\n"
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" -h, --help: print this help\n"
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" -d, --dump: print registers\n"
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" -w, --write <addr> <data>: write to register\n"
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" -r, --read <addr>: read from register\n"
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" -c, --clear-bit <addr> <bit>\n"
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" -s, --set-bit <addr> <bit>\n"
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"\n"
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"Attention! Writing to PMH7 registers is very dangerous, as you\n"
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" directly manipulate the power rails, enable lines,\n"
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" interrupt lines or something else of the device.\n"
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" Proceed with caution."
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"\n");
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}
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enum action {HELP, DUMP, WRITE, READ, CLEAR, SET};
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int main(int argc, char *argv[])
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{
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enum action act = HELP;
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int opt, option_index = 0;
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long input_addr = 0, input_data = 0;
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"dump", 0, 0, 'd'},
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{"write", 1, 0, 'w'},
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{"read", 1, 0, 'r'},
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{"clear-bit", 1, 0, 'c'},
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{"set-bit", 1, 0, 's'},
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{0, 0, 0, 0}
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};
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if (argv[1] == NULL) {
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print_usage(argv[0]);
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exit(0);
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}
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while ((opt = getopt_long(argc, argv, "hdw:r:c:s:",
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long_options, &option_index)) != EOF) {
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switch (opt) {
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case 'd':
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act = DUMP;
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break;
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case 'r':
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input_addr = strtoul(optarg, NULL, 16);
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act = READ;
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break;
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case 'w':
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case 'c':
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case 's':
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input_addr = strtoul(optarg, NULL, 16);
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if (optind < argc && *argv[optind] != '-') {
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input_data = strtoul(argv[optind], NULL, 16);
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optind++;
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} else {
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fprintf(stderr,
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"Error: -%c option requires two arguments\n",
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opt);
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exit(1);
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}
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switch (opt) {
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case 'w':
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act = WRITE;
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break;
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case 'c':
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act = CLEAR;
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break;
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case 's':
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act = SET;
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break;
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}
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break;
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}
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}
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if (optind < argc) {
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fprintf(stderr, "Error: Extra parameter found.\n");
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print_usage(argv[0]);
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exit(1);
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}
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if (act == HELP) {
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print_usage(argv[0]);
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exit(0);
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}
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if (input_addr > 0x1ff) {
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fprintf(stderr,
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"Error: <addr> cannot be greater than 9 bits long.\n");
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exit(1);
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}
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if (act == SET || act == CLEAR) {
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if (input_data > 7) {
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fprintf(stderr,
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"Error: <bit> cannot be greater than 7.\n");
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exit(1);
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}
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} else {
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if (input_data > 0xff) {
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fprintf(stderr,
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"Error: <data> cannot be greater than 8 bits long.\n");
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exit(1);
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}
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}
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if (geteuid() != 0) {
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fprintf(stderr, "You must be root.\n");
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exit(1);
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}
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if (ioperm(EC_LENOVO_PMH7_BASE, 0x10, 1)) {
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fprintf(stderr, "ioperm: %s\n", strerror(errno));
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exit(1);
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}
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switch (act) {
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case DUMP:
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for (int i = 0; i < 0x200; i++) {
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if ((i % 0x10) == 0) {
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if (i != 0)
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printf("\n");
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printf("%04x: ", i);
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}
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printf("%02x ", pmh7_register_read(i));
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}
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printf("\n");
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break;
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case READ:
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printf("%02x\n", pmh7_register_read(input_addr));
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break;
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case WRITE:
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pmh7_register_write(input_addr, input_data);
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break;
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case CLEAR:
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pmh7_register_clear_bit(input_addr, input_data);
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break;
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case SET:
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pmh7_register_set_bit(input_addr, input_data);
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break;
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default:
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break;
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}
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return 0;
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}
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29
util/pmh7tool/pmh7tool.h
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29
util/pmh7tool/pmh7tool.h
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@ -0,0 +1,29 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2018 Evgeny Zinoviev <me@ch1p.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef PMH7TOOL_H
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#define PMH7TOOL_H
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#define EC_LENOVO_PMH7_BASE 0x15e0
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#define EC_LENOVO_PMH7_ADDR_L (EC_LENOVO_PMH7_BASE + 0x0c)
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#define EC_LENOVO_PMH7_ADDR_H (EC_LENOVO_PMH7_BASE + 0x0d)
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#define EC_LENOVO_PMH7_DATA (EC_LENOVO_PMH7_BASE + 0x0e)
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uint8_t pmh7_register_read(uint16_t reg);
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void pmh7_register_write(uint16_t reg, uint8_t val);
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void pmh7_register_set_bit(uint16_t reg, uint8_t bit);
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void pmh7_register_clear_bit(uint16_t reg, uint8_t bit);
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#endif /* PMH7TOOL_H */
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