mirror of
https://github.com/tiagovignatti/intel-gpu-tools.git
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146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/*
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* Copyright © 2009 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Zhenyu Wang <zhenyu.z.wang@intel.com>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <pciaccess.h>
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#include <err.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "intel_io.h"
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#include "intel_reg.h"
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#include "intel_bios.h"
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#include "intel_chipset.h"
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enum lid_status {
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LID_UNKNOWN = -1,
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LID_OPEN,
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LID_CLOSE,
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};
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#define ACPI_BUTTON "/proc/acpi/button/"
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#define ACPI_LID "/proc/acpi/button/lid/"
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static int i830_lvds_acpi_lid_state(void)
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{
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int fd;
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DIR *button_dir;
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DIR *lid_dir;
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struct dirent *lid_dent;
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char *state_name;
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char state[64];
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enum lid_status ret = LID_UNKNOWN;
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button_dir = opendir(ACPI_BUTTON);
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/* If acpi button driver is not loaded, bypass ACPI check method */
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if (button_dir == NULL)
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goto out;
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closedir(button_dir);
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lid_dir = opendir(ACPI_LID);
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/* no acpi lid object found */
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if (lid_dir == NULL)
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goto out;
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while (1) {
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lid_dent = readdir(lid_dir);
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if (lid_dent == NULL) {
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/* no LID object */
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closedir(lid_dir);
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goto out;
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}
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if (strcmp(lid_dent->d_name, ".") &&
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strcmp(lid_dent->d_name, "..")) {
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break;
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}
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}
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state_name = malloc(strlen(ACPI_LID) + strlen(lid_dent->d_name) + 7);
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memset(state_name, 0, strlen(ACPI_LID) + strlen(lid_dent->d_name) + 7);
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strcat(state_name, ACPI_LID);
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strcat(state_name, lid_dent->d_name);
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strcat(state_name, "/state");
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closedir(lid_dir);
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if ((fd = open(state_name, O_RDONLY)) == -1) {
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free(state_name);
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goto out;
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}
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free(state_name);
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if (read(fd, state, 64) == -1) {
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close(fd);
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goto out;
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}
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close(fd);
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if (strstr(state, "open"))
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ret = LID_OPEN;
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else if (strstr(state, "closed"))
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ret = LID_CLOSE;
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else /* "unsupported" */
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ret = LID_UNKNOWN;
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out:
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return ret;
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}
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int main(int argc, char **argv)
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{
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int swf14, acpi_lid;
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intel_mmio_use_pci_bar(intel_get_pci_device());
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while (1) {
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swf14 = INREG(SWF14);
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printf("Intel LVDS Lid status:\n");
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printf("\tSWF14(0x%x) : %s\n", swf14,
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swf14 & SWF14_LID_SWITCH_EN ? "close" : "open");
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acpi_lid = i830_lvds_acpi_lid_state();
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switch (acpi_lid) {
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case LID_UNKNOWN:
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printf("\tACPI Lid state : unknown\n");
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break;
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case LID_OPEN:
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printf("\tACPI Lid state : open\n");
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break;
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case LID_CLOSE:
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printf("\tACPI Lid state : close\n");
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break;
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}
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sleep(2);
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}
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return 0;
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}
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