4 Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 * msi-laptop.c - MSI S270 laptop support. This laptop is sold under
24 * various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
26 * Driver also supports S271, S420 models.
28 * This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
30 * lcd_level - Screen brightness: contains a single integer in the
33 * auto_brightness - Enable automatic brightness control: contains
34 * either 0 or 1. If set to 1 the hardware adjusts the screen
35 * brightness automatically when the power cord is
36 * plugged/unplugged. (rw)
38 * wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
40 * bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
41 * Please note that this file is constantly 0 if no Bluetooth
42 * hardware is available. (ro)
44 * In addition to these platform device attributes the driver
45 * registers itself in the Linux backlight control subsystem and is
46 * available to userspace under /sys/class/backlight/msi-laptop-bl/.
48 * This driver might work on other laptops produced by MSI. If you
49 * want to try it you can pass force=1 as argument to the module which
50 * will force it to load even when the DMI data doesn't identify the
51 * laptop as MSI S270. YMMV.
54 #include <linux/module.h>
55 #include <linux/kernel.h>
56 #include <linux/init.h>
57 #include <linux/acpi.h>
58 #include <linux/dmi.h>
59 #include <linux/backlight.h>
60 #include <linux/platform_device.h>
62 #define MSI_DRIVER_VERSION "0.5"
64 #define MSI_LCD_LEVEL_MAX 9
66 #define MSI_EC_COMMAND_WIRELESS 0x10
67 #define MSI_EC_COMMAND_LCD_LEVEL 0x11
69 #define MSI_STANDARD_EC_COMMAND_ADDRESS 0x2e
70 #define MSI_STANDARD_EC_BLUETOOTH_MASK (1 << 0)
71 #define MSI_STANDARD_EC_WEBCAM_MASK (1 << 1)
72 #define MSI_STANDARD_EC_WLAN_MASK (1 << 3)
75 module_param(force, bool, 0);
76 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
78 static int auto_brightness;
79 module_param(auto_brightness, int, 0);
80 MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");
82 static bool old_ec_model;
83 static int wlan_s, bluetooth_s;
87 static int set_lcd_level(int level)
91 if (level < 0 || level >= MSI_LCD_LEVEL_MAX)
95 buf[1] = (u8) (level*31);
97 return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), NULL, 0, 1);
100 static int get_lcd_level(void)
105 result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1, 1);
109 return (int) rdata / 31;
112 static int get_auto_brightness(void)
117 result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1, 1);
121 return !!(rdata & 8);
124 static int set_auto_brightness(int enable)
131 result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, &rdata, 1, 1);
136 wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0);
138 return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, NULL, 0, 1);
141 static int get_wireless_state(int *wlan, int *bluetooth)
146 result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1, 1);
151 *wlan = !!(rdata & 8);
154 *bluetooth = !!(rdata & 128);
159 static int get_wireless_state_ec_standard(void)
164 result = ec_read(MSI_STANDARD_EC_COMMAND_ADDRESS, &rdata);
168 wlan_s = !!(rdata & MSI_STANDARD_EC_WLAN_MASK);
170 bluetooth_s = !!(rdata & MSI_STANDARD_EC_BLUETOOTH_MASK);
175 /* Backlight device stuff */
177 static int bl_get_brightness(struct backlight_device *b)
179 return get_lcd_level();
183 static int bl_update_status(struct backlight_device *b)
185 return set_lcd_level(b->props.brightness);
188 static struct backlight_ops msibl_ops = {
189 .get_brightness = bl_get_brightness,
190 .update_status = bl_update_status,
193 static struct backlight_device *msibl_device;
195 /* Platform device */
197 static ssize_t show_wlan(struct device *dev,
198 struct device_attribute *attr, char *buf)
204 ret = get_wireless_state(&enabled, NULL);
206 ret = get_wireless_state_ec_standard();
212 return sprintf(buf, "%i\n", enabled);
215 static ssize_t show_bluetooth(struct device *dev,
216 struct device_attribute *attr, char *buf)
222 ret = get_wireless_state(NULL, &enabled);
224 ret = get_wireless_state_ec_standard();
225 enabled = bluetooth_s;
230 return sprintf(buf, "%i\n", enabled);
233 static ssize_t show_lcd_level(struct device *dev,
234 struct device_attribute *attr, char *buf)
239 ret = get_lcd_level();
243 return sprintf(buf, "%i\n", ret);
246 static ssize_t store_lcd_level(struct device *dev,
247 struct device_attribute *attr, const char *buf, size_t count)
252 if (sscanf(buf, "%i", &level) != 1 || (level < 0 || level >= MSI_LCD_LEVEL_MAX))
255 ret = set_lcd_level(level);
262 static ssize_t show_auto_brightness(struct device *dev,
263 struct device_attribute *attr, char *buf)
268 ret = get_auto_brightness();
272 return sprintf(buf, "%i\n", ret);
275 static ssize_t store_auto_brightness(struct device *dev,
276 struct device_attribute *attr, const char *buf, size_t count)
281 if (sscanf(buf, "%i", &enable) != 1 || (enable != (enable & 1)))
284 ret = set_auto_brightness(enable);
291 static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
292 static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
293 static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
294 static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);
296 static struct attribute *msipf_attributes[] = {
297 &dev_attr_lcd_level.attr,
298 &dev_attr_auto_brightness.attr,
299 &dev_attr_bluetooth.attr,
304 static struct attribute_group msipf_attribute_group = {
305 .attrs = msipf_attributes
308 static struct platform_driver msipf_driver = {
310 .name = "msi-laptop-pf",
311 .owner = THIS_MODULE,
315 static struct platform_device *msipf_device;
319 static int dmi_check_cb(const struct dmi_system_id *id)
321 printk("msi-laptop: Identified laptop model '%s'.\n", id->ident);
325 static struct dmi_system_id __initdata msi_dmi_table[] = {
329 DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
330 DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
331 DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
332 DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR INT'L CO.,LTD")
334 .callback = dmi_check_cb
339 DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
340 DMI_MATCH(DMI_PRODUCT_NAME, "MS-1058"),
341 DMI_MATCH(DMI_PRODUCT_VERSION, "0581"),
342 DMI_MATCH(DMI_BOARD_NAME, "MS-1058")
344 .callback = dmi_check_cb
349 DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
350 DMI_MATCH(DMI_PRODUCT_NAME, "MS-1412"),
351 DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
352 DMI_MATCH(DMI_BOARD_NAME, "MS-1412")
354 .callback = dmi_check_cb
357 .ident = "Medion MD96100",
359 DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
360 DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
361 DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
362 DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR INT'L CO.,LTD")
364 .callback = dmi_check_cb
369 static int __init msi_init(void)
376 if (force || dmi_check_system(msi_dmi_table))
379 if (auto_brightness < 0 || auto_brightness > 2)
382 /* Register backlight stuff */
384 if (acpi_video_backlight_support()) {
385 printk(KERN_INFO "MSI: Brightness ignored, must be controlled "
386 "by ACPI video driver\n");
388 msibl_device = backlight_device_register("msi-laptop-bl", NULL,
390 if (IS_ERR(msibl_device))
391 return PTR_ERR(msibl_device);
392 msibl_device->props.max_brightness = MSI_LCD_LEVEL_MAX-1;
395 ret = platform_driver_register(&msipf_driver);
399 /* Register platform stuff */
401 msipf_device = platform_device_alloc("msi-laptop-pf", -1);
404 goto fail_platform_driver;
407 ret = platform_device_add(msipf_device);
409 goto fail_platform_device1;
411 ret = sysfs_create_group(&msipf_device->dev.kobj, &msipf_attribute_group);
413 goto fail_platform_device2;
415 /* Disable automatic brightness control by default because
416 * this module was probably loaded to do brightness control in
419 if (auto_brightness != 2)
420 set_auto_brightness(auto_brightness);
422 printk(KERN_INFO "msi-laptop: driver "MSI_DRIVER_VERSION" successfully loaded.\n");
426 fail_platform_device2:
428 platform_device_del(msipf_device);
430 fail_platform_device1:
432 platform_device_put(msipf_device);
434 fail_platform_driver:
436 platform_driver_unregister(&msipf_driver);
440 backlight_device_unregister(msibl_device);
445 static void __exit msi_cleanup(void)
448 sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
449 platform_device_unregister(msipf_device);
450 platform_driver_unregister(&msipf_driver);
451 backlight_device_unregister(msibl_device);
453 /* Enable automatic brightness control again */
454 if (auto_brightness != 2)
455 set_auto_brightness(1);
457 printk(KERN_INFO "msi-laptop: driver unloaded.\n");
460 module_init(msi_init);
461 module_exit(msi_cleanup);
463 MODULE_AUTHOR("Lennart Poettering");
464 MODULE_DESCRIPTION("MSI Laptop Support");
465 MODULE_VERSION(MSI_DRIVER_VERSION);
466 MODULE_LICENSE("GPL");
468 MODULE_ALIAS("dmi:*:svnMICRO-STARINT'LCO.,LTD:pnMS-1013:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
469 MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1058:pvr0581:rvnMSI:rnMS-1058:*:ct10:*");
470 MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1412:*:rvnMSI:rnMS-1412:*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
471 MODULE_ALIAS("dmi:*:svnNOTEBOOK:pnSAM2000:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
472 MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-N034:*");