From: Lennart Poettering <[email protected]>
This is my second try of the MSI S270 laptop driver. On request of Len
Brown I changed the following things:
- Move driver from drivers/acpi/s270.c to drivers/misc/s270.c
- Remove /proc/acpi/s270 interface, replace it by a platform device
/sys/devices/platform/s270pf/. This means: no procfs is touched
anymore, all features are now accessible through /sys/.
This patch applies to 2.6.17 and requires the ACPI ec_transaction()
patch I posted earlier:
http://marc.theaimsgroup.com/?l=linux-acpi&m=115517193511970&w=2
Please comment and/or apply!
Lennart
Signed-off-by: Lennart Poettering <[email protected]>
---
--- linux-source-2.6.17.orig/MAINTAINERS 2006-06-18 03:49:35.000000000 +0200
+++ linux-source-2.6.17/MAINTAINERS 2006-08-10 01:16:50.000000000 +0200
@@ -1882,6 +1882,13 @@ M: [email protected]
L: [email protected]
S: Maintained
+MSI S270 LAPTOP SUPPORT
+P: Lennart Poettering
+M: [email protected]
+L: https://tango.0pointer.de/mailman/listinfo/s270-linux
+W: http://0pointer.de/lennart/tchibo.html
+S: Maintained
+
MTRR AND SIMILAR SUPPORT [i386]
P: Richard Gooch
M: [email protected]
--- linux-source-2.6.17.orig/drivers/misc/Kconfig 2006-06-18 03:49:35.000000000 +0200
+++ linux-source-2.6.17/drivers/misc/Kconfig 2006-08-10 17:45:46.000000000 +0200
@@ -28,5 +28,19 @@ config IBM_ASM
If unsure, say N.
+config MSI_S270
+ tristate "MSI S270 Laptop Extras"
+ depends on X86
+ depends on ACPI_EC
+ depends on BACKLIGHT_CLASS_DEVICE
+ ---help---
+ This is a driver for MSI S270 laptops. It adds
+ support for Bluetooth, WLAN and LCD brightness control.
+
+ More information about this driver is available at
+ <http://0pointer.de/lennart/tchibo.html>.
+
+ If you have an MSI S270 laptop, say Y or M here.
+
endmenu
--- linux-source-2.6.17.orig/drivers/misc/Makefile 2006-06-18 03:49:35.000000000 +0200
+++ linux-source-2.6.17/drivers/misc/Makefile 2006-08-10 17:43:54.000000000 +0200
@@ -5,3 +5,4 @@ obj- := misc.o # Dummy rule to force bui
obj-$(CONFIG_IBM_ASM) += ibmasm/
obj-$(CONFIG_HDPU_FEATURES) += hdpuftrs/
+obj-$(CONFIG_MSI_S270) += s270.o
--- linux-source-2.6.17.orig/drivers/misc/s270.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-source-2.6.17/drivers/misc/s270.c 2006-08-10 18:05:22.000000000 +0200
@@ -0,0 +1,372 @@
+/*-*-linux-c-*-*/
+
+/* $Id: s270.c 109 2006-08-10 16:05:22Z lennart $ */
+
+/***
+ Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
+
+ 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+***/
+
+/*
+ * s270.c - MSI S270 laptop support. This laptop is sold under various
+ * brands, including "Cytron/TCM/Medion/Tchibo MD96100".
+ *
+ * This driver exports a few files in /sys/devices/platform/s270pf/:
+ *
+ * lcd_level - Screen brightness: contains a single integer in the
+ * range 0..8. (rw)
+ *
+ * auto_brightness - Enable automatic brightness control: contains
+ * either 0 or 1. If set to 1 the hardware adjusts the screen
+ * brightness automatically when the power cord is
+ * plugged/unplugged. (rw)
+ *
+ * wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
+ *
+ * bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
+ * Please note that this file is constantly 0 if no Bluetooth
+ * hardware is available. (ro)
+ *
+ * In addition to these platform device attributes the driver
+ * registers itself in the Linux backlight control subsystem and is
+ * available to userspace under /sys/class/backlight/s270bl/.
+ *
+ * This driver might work on other laptops produced by MSI. If you
+ * want to try it you can pass force=1 as argument to the module which
+ * will force it to load even when the DMI data doesn't identify the
+ * laptop as MSI S270. YMMV.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/platform_device.h>
+#include <linux/autoconf.h>
+
+#define S270_VERSION "0.2"
+
+#define MSI_LCD_LEVEL_MAX 9
+
+#define MSI_EC_COMMAND_WIRELESS 0x10
+#define MSI_EC_COMMAND_LCD_LEVEL 0x11
+
+static int force;
+module_param(force, bool, 0);
+MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
+
+static int auto_brightness;
+module_param(auto_brightness, int, 0);
+MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");
+
+/*** Hardware access ***/
+
+static const uint8_t lcd_table[MSI_LCD_LEVEL_MAX] = {
+ 0x00, 0x1f, 0x3e, 0x5d, 0x7c, 0x9b, 0xba, 0xd9, 0xf8
+};
+
+static int set_lcd_level(int level) {
+ u8 buf[2];
+
+ if (level < 0 || level >= MSI_LCD_LEVEL_MAX)
+ return -EINVAL;
+
+ buf[0] = 0x80;
+ buf[1] = lcd_table[level];
+
+ return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), NULL, 0);
+}
+
+static int get_lcd_level(void) {
+ u8 wdata = 0, rdata;
+ int i, result;
+
+ if ((result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1)) < 0)
+ return result;
+
+ for (i = 0; i < MSI_LCD_LEVEL_MAX; i++)
+ if (lcd_table[i] == rdata)
+ return i;
+
+ return -EIO;
+}
+
+static int get_auto_brightness(void) {
+ u8 wdata = 4, rdata;
+ int result;
+
+ if ((result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1)) < 0)
+ return result;
+
+ return !!(rdata & 8);
+}
+
+static int set_auto_brightness(int enable) {
+ u8 wdata[2], rdata;
+ int result;
+
+ wdata[0] = 4;
+
+ if ((result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, &rdata, 1)) < 0)
+ return result;
+
+ wdata[0] = 0x84;
+ wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0);
+
+ return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, NULL, 0);
+}
+
+static int get_wireless_state(int *wlan, int *bluetooth) {
+ u8 wdata = 0, rdata;
+ int result;
+
+ if ((result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1)) < 0)
+ return -1;
+
+ if (wlan)
+ *wlan = !!(rdata & 8);
+
+ if (bluetooth)
+ *bluetooth = !!(rdata & 128);
+
+ return 0;
+}
+
+/*** Backlight device stuff ***/
+
+static int bl_get_brightness(struct backlight_device *b) {
+ return get_lcd_level();
+}
+
+
+static int bl_update_status(struct backlight_device *b) {
+ return set_lcd_level(b->props->brightness);
+}
+
+static struct backlight_properties s270bl_props = {
+ .owner = THIS_MODULE,
+ .get_brightness = bl_get_brightness,
+ .update_status = bl_update_status,
+ .max_brightness = MSI_LCD_LEVEL_MAX,
+};
+
+static struct backlight_device *s270bl_device;
+
+/*** Platform device ***/
+
+static ssize_t show_wlan(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+
+ int ret, enabled;
+
+ if ((ret = get_wireless_state(&enabled, NULL)) < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", enabled);
+}
+
+static ssize_t show_bluetooth(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+
+ int ret, enabled;
+
+ if ((ret = get_wireless_state(NULL, &enabled)) < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", enabled);
+}
+
+static ssize_t show_lcd_level(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+
+ int ret;
+
+ if ((ret = get_lcd_level()) < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t store_lcd_level(
+ struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+
+ int level, ret;
+
+ if (sscanf(buf, "%i", &level) != 1 || (level < 0 || level > 8))
+ return -EINVAL;
+
+ if ((ret = set_lcd_level(level)) < 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t show_auto_brightness(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+
+ int ret;
+
+ if ((ret = get_auto_brightness()) < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t store_auto_brightness(
+ struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+
+ int enable, ret;
+
+ if (sscanf(buf, "%i", &enable) != 1 || (enable != (enable & 1)))
+ return -EINVAL;
+
+ if ((ret = set_auto_brightness(enable)) < 0)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
+static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
+static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
+static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);
+
+static struct attribute *s270pf_attributes[] = {
+ &dev_attr_lcd_level.attr,
+ &dev_attr_auto_brightness.attr,
+ &dev_attr_bluetooth.attr,
+ &dev_attr_wlan.attr,
+ NULL
+};
+
+static struct attribute_group s270pf_attribute_group = {
+ .attrs = s270pf_attributes
+};
+
+static struct platform_driver s270pf_driver = {
+ .driver = {
+ .name = "s270pf",
+ .owner = THIS_MODULE,
+ }
+};
+
+static struct platform_device *s270pf_device;
+
+/*** Initialization ***/
+
+static struct dmi_system_id __initdata s270_dmi_table[] = { {
+ .ident = "MSI S270",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
+ }
+}, { } };
+
+
+static int __init s270_init(void) {
+ int ret;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ if (!force && !dmi_check_system(s270_dmi_table))
+ return -ENODEV;
+
+ if (auto_brightness < 0 || auto_brightness > 2)
+ return -EINVAL;
+
+ /* Register backlight stuff */
+
+ s270bl_device = backlight_device_register("s270bl", NULL, &s270bl_props);
+ if (IS_ERR(s270bl_device))
+ return PTR_ERR(s270bl_device);
+
+ if ((ret = platform_driver_register(&s270pf_driver)))
+ goto fail_backlight;
+
+ /* Register platform stuff */
+
+ s270pf_device = platform_device_register_simple("s270pf", -1, NULL, 0);
+ if (IS_ERR(s270pf_device)) {
+ ret = PTR_ERR(s270pf_device);
+ goto fail_platform_driver;
+ }
+
+ if ((ret = sysfs_create_group(&s270pf_device->dev.kobj, &s270pf_attribute_group)))
+ goto fail_platform_device;
+
+ /* Disable automatic brightness control by default because
+ * this module was probably loaded to do brightness control in
+ * software. */
+
+ if (auto_brightness != 2)
+ set_auto_brightness(auto_brightness);
+
+ printk(KERN_INFO "s270: driver "S270_VERSION" successfully loaded.\n");
+
+ return 0;
+
+fail_platform_device:
+
+ platform_device_unregister(s270pf_device);
+
+fail_platform_driver:
+
+ platform_driver_unregister(&s270pf_driver);
+
+fail_backlight:
+
+ backlight_device_unregister(s270bl_device);
+
+ return ret;
+}
+
+static void __exit s270_cleanup(void) {
+
+ sysfs_remove_group(&s270pf_device->dev.kobj, &s270pf_attribute_group);
+ platform_device_unregister(s270pf_device);
+ platform_driver_unregister(&s270pf_driver);
+ backlight_device_unregister(s270bl_device);
+
+ /* Enable automatic brightness control again */
+ if (auto_brightness != 2)
+ set_auto_brightness(1);
+
+ printk(KERN_INFO "s270: driver unloaded.\n");
+}
+
+module_init(s270_init);
+module_exit(s270_cleanup);
+
+MODULE_AUTHOR("Lennart Poettering");
+MODULE_DESCRIPTION("MSI S270 Laptop Support");
+MODULE_VERSION(S270_VERSION);
+MODULE_LICENSE("GPL");
-
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