Revision: 54
http://svn.sourceforge.net/mactel-linux/?rev=54&view=rev
Author: ludov
Date: 2006-10-17 12:44:19 -0700 (Tue, 17 Oct 2006)
Log Message:
-----------
Apple Macbook Pro LCD backlight control
Added Paths:
-----------
trunk/tools/backlight/
trunk/tools/backlight/Makefile
trunk/tools/backlight/backlight.c
Added: trunk/tools/backlight/Makefile
===================================================================
--- trunk/tools/backlight/Makefile (rev 0)
+++ trunk/tools/backlight/Makefile 2006-10-17 19:44:19 UTC (rev 54)
@@ -0,0 +1,14 @@
+VERSION=0.1.1
+CFLAGS=-Wall -g -Wextra -DVERSION=\"$(VERSION)\"
+LIBS=-lpci
+
+backlight: backlight.c
+ gcc $(CFLAGS) $^ -o $@ $(LIBS)
+
+install: backlight
+ install -s -m 4755 backlight /usr/local/bin
+
+clean:
+ rm -f backlight
+ rm -f *~
+
Added: trunk/tools/backlight/backlight.c
===================================================================
--- trunk/tools/backlight/backlight.c (rev 0)
+++ trunk/tools/backlight/backlight.c 2006-10-17 19:44:19 UTC (rev 54)
@@ -0,0 +1,194 @@
+/*
+ * Apple Macbook Pro LCD backlight control
+ *
+ * Copyright (C) 2006 Nicolas Boichat <[EMAIL PROTECTED]>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <sys/io.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <pci/pci.h>
+
+char* memory;
+
+static inline unsigned int readl(const volatile void *addr)
+{
+ return *(volatile unsigned int*) addr;
+}
+
+static inline void writel(unsigned int b, volatile void *addr)
+{
+ *(volatile unsigned int*) addr = b;
+}
+
+#define INREG(addr) readl(memory+addr)
+#define OUTREG(addr,val) writel(val, memory+addr)
+
+unsigned char read_backlight() {
+ return INREG(0x7af8) >> 8;
+}
+
+void write_backlight_value(unsigned char value) {
+ OUTREG(0x7af8, 0x00000001 | ((unsigned int)value << 8));
+}
+
+void write_backlight(unsigned char value) {
+ unsigned int current = read_backlight();
+
+ if (current < value) {
+ while (current < value) {
+ current += 5;
+ if (current > value)
+ current = value;
+ write_backlight_value((unsigned char)current);
+ usleep(50000);
+ }
+ }
+ else {
+ while (current > value) {
+ current -= 5;
+ if (current < value)
+ current = value;
+ write_backlight_value((unsigned char)current);
+ usleep(50000);
+ }
+ }
+}
+
+void usage(char* argv0) {
+ printf("Apple Macbook (pro) backlight control " VERSION);
+ printf("\n");
+ printf("Usage:\n");
+ printf("%s: read current value\n", argv0);
+ printf("%s value: write value [0-255]\n", argv0);
+ printf("%s +n: increase value by n\n", argv0);
+ printf("%s -n: decrease value by n\n", argv0);
+}
+
+int main(int argc, char** argv) {
+ if (argc > 2) {
+ usage(argv[0]);
+ return 1;
+ }
+
+ char* endptr;
+ int ret = 0;
+ long address = 0;
+ long length = 0;
+ int fd;
+ int state;
+
+ /* Search for the graphics card. */
+ /* Default values: */
+ /* address = 0x90300000; */
+ /* length = 0x20000; */
+
+ struct pci_access *pacc = pci_alloc();
+ pci_init(pacc);
+ pci_scan_bus(pacc);
+ struct pci_dev *dev;
+ for(dev=pacc->devices; dev; dev=dev->next) { /* Iterate over all
devices */
+ pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES);
+ if ((dev->vendor_id == 0x1002) && (dev->device_id == 0x71c5)) {
// ATI X1600
+ address = dev->base_addr[2];
+ length = dev->size[2];
+ }
+ }
+ pci_cleanup(pacc);
+
+ if (!address) {
+ printf("Failed to detect ATI X1600, aborting...\n");
+ return 1;
+ }
+
+ fd = open("/dev/mem", O_RDWR);
+
+ if (fd < 0) {
+ perror("cannot open /dev/mem");
+ return 1;
+ }
+
+ memory = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_SHARED, fd,
address);
+
+ if (memory == MAP_FAILED) {
+ perror("mmap failed");
+ return 1;
+ }
+
+ /* Is it really necessary ? */
+ OUTREG(0x4dc, 0x00000005);
+ state = INREG(0x7ae4);
+ OUTREG(0x7ae4, state);
+
+ if (argc == 2) {
+ if (argv[1][0] == '+') {
+ long value = strtol(&argv[1][1], &endptr, 10);
+ if ((value < 0) || (value > 255) || (endptr[0])) {
+ printf("Invalid value \"%s\" (should be an
integer between 0 and 255).\n", &argv[1][1]);
+ usage(argv[0]);
+ ret = 1;
+ }
+ else {
+ value = read_backlight()+value;
+ if (value > 255)
+ value = 255;
+ write_backlight(value);
+ }
+ }
+ else if (argv[1][0] == '-') {
+ long value = strtol(&argv[1][1], &endptr, 10);
+ if ((value < 0) || (value > 255) || (endptr[0])) {
+ printf("Invalid value \"%s\" (should be an
integer between 0 and 255).\n", &argv[1][1]);
+ usage(argv[0]);
+ ret = 1;
+ }
+ else {
+ value = read_backlight()-value;
+ if (value < 0)
+ value = 0;
+ write_backlight(value);
+ }
+ }
+ else {
+ long value = strtol(argv[1], &endptr, 10);
+ if ((value < 0) || (value > 255) || (endptr[0])) {
+ printf("Invalid value \"%s\" (should be an
integer between 0 and 255).\n", argv[1]);
+ usage(argv[0]);
+ ret = 1;
+ }
+ else {
+ write_backlight(value);
+ }
+ }
+ }
+ else {
+ printf("%d\n", read_backlight());
+ }
+
+ munmap(memory, length);
+ close(fd);
+
+ return ret;
+}
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