405 lines
8.6 KiB
C
405 lines
8.6 KiB
C
/*-*-linux-c-*-*/
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/*
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Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com>
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based on MSI driver
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Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
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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; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA.
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*/
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/*
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* comapl-laptop.c - Compal laptop support.
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*
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* This driver exports a few files in /sys/devices/platform/compal-laptop/:
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*
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* wlan - wlan subsystem state: contains 0 or 1 (rw)
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*
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* bluetooth - Bluetooth subsystem state: contains 0 or 1 (rw)
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*
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* raw - raw value taken from embedded controller register (ro)
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*
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* In addition to these platform device attributes the driver
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* registers itself in the Linux backlight control subsystem and is
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* available to userspace under /sys/class/backlight/compal-laptop/.
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*
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* This driver might work on other laptops produced by Compal. If you
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* want to try it you can pass force=1 as argument to the module which
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* will force it to load even when the DMI data doesn't identify the
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* laptop as FL9x.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/acpi.h>
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#include <linux/dmi.h>
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#include <linux/backlight.h>
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#include <linux/platform_device.h>
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#include <linux/autoconf.h>
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#define COMPAL_DRIVER_VERSION "0.2.6"
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#define COMPAL_LCD_LEVEL_MAX 8
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#define COMPAL_EC_COMMAND_WIRELESS 0xBB
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#define COMPAL_EC_COMMAND_LCD_LEVEL 0xB9
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#define KILLSWITCH_MASK 0x10
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#define WLAN_MASK 0x01
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#define BT_MASK 0x02
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static int force;
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module_param(force, bool, 0);
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MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
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/* Hardware access */
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static int set_lcd_level(int level)
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{
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if (level < 0 || level >= COMPAL_LCD_LEVEL_MAX)
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return -EINVAL;
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ec_write(COMPAL_EC_COMMAND_LCD_LEVEL, level);
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return 0;
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}
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static int get_lcd_level(void)
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{
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u8 result;
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ec_read(COMPAL_EC_COMMAND_LCD_LEVEL, &result);
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return (int) result;
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}
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static int set_wlan_state(int state)
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{
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u8 result, value;
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ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
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if ((result & KILLSWITCH_MASK) == 0)
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return -EINVAL;
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else {
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if (state)
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value = (u8) (result | WLAN_MASK);
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else
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value = (u8) (result & ~WLAN_MASK);
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ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
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}
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return 0;
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}
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static int set_bluetooth_state(int state)
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{
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u8 result, value;
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ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
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if ((result & KILLSWITCH_MASK) == 0)
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return -EINVAL;
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else {
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if (state)
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value = (u8) (result | BT_MASK);
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else
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value = (u8) (result & ~BT_MASK);
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ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
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}
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return 0;
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}
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static int get_wireless_state(int *wlan, int *bluetooth)
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{
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u8 result;
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ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
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if (wlan) {
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if ((result & KILLSWITCH_MASK) == 0)
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*wlan = 0;
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else
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*wlan = result & WLAN_MASK;
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}
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if (bluetooth) {
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if ((result & KILLSWITCH_MASK) == 0)
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*bluetooth = 0;
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else
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*bluetooth = (result & BT_MASK) >> 1;
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}
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return 0;
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}
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/* Backlight device stuff */
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static int bl_get_brightness(struct backlight_device *b)
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{
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return get_lcd_level();
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}
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static int bl_update_status(struct backlight_device *b)
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{
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return set_lcd_level(b->props.brightness);
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}
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static struct backlight_ops compalbl_ops = {
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.get_brightness = bl_get_brightness,
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.update_status = bl_update_status,
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};
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static struct backlight_device *compalbl_device;
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/* Platform device */
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static ssize_t show_wlan(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int ret, enabled;
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ret = get_wireless_state(&enabled, NULL);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%i\n", enabled);
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}
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static ssize_t show_raw(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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u8 result;
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ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
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return sprintf(buf, "%i\n", result);
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}
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static ssize_t show_bluetooth(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int ret, enabled;
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ret = get_wireless_state(NULL, &enabled);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%i\n", enabled);
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}
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static ssize_t store_wlan_state(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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int state, ret;
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if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
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return -EINVAL;
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ret = set_wlan_state(state);
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if (ret < 0)
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return ret;
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return count;
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}
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static ssize_t store_bluetooth_state(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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int state, ret;
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if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
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return -EINVAL;
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ret = set_bluetooth_state(state);
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if (ret < 0)
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return ret;
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return count;
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}
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static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state);
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static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state);
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static DEVICE_ATTR(raw, 0444, show_raw, NULL);
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static struct attribute *compal_attributes[] = {
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&dev_attr_bluetooth.attr,
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&dev_attr_wlan.attr,
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&dev_attr_raw.attr,
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NULL
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};
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static struct attribute_group compal_attribute_group = {
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.attrs = compal_attributes
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};
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static struct platform_driver compal_driver = {
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.driver = {
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.name = "compal-laptop",
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.owner = THIS_MODULE,
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}
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};
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static struct platform_device *compal_device;
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/* Initialization */
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static int dmi_check_cb(const struct dmi_system_id *id)
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{
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printk(KERN_INFO "compal-laptop: Identified laptop model '%s'.\n",
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id->ident);
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return 0;
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}
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static struct dmi_system_id __initdata compal_dmi_table[] = {
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{
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.ident = "FL90/IFL90",
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.matches = {
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DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
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DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
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},
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.callback = dmi_check_cb
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},
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{
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.ident = "FL90/IFL90",
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.matches = {
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DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
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DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
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},
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.callback = dmi_check_cb
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},
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{
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.ident = "FL91/IFL91",
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.matches = {
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DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
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DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
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},
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.callback = dmi_check_cb
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},
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{
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.ident = "FL92/JFL92",
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.matches = {
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DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
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DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
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},
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.callback = dmi_check_cb
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},
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{
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.ident = "FT00/IFT00",
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.matches = {
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DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
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DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
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},
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.callback = dmi_check_cb
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},
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{ }
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};
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static int __init compal_init(void)
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{
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int ret;
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if (acpi_disabled)
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return -ENODEV;
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if (!force && !dmi_check_system(compal_dmi_table))
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return -ENODEV;
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/* Register backlight stuff */
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compalbl_device = backlight_device_register("compal-laptop", NULL, NULL,
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&compalbl_ops);
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if (IS_ERR(compalbl_device))
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return PTR_ERR(compalbl_device);
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compalbl_device->props.max_brightness = COMPAL_LCD_LEVEL_MAX-1;
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ret = platform_driver_register(&compal_driver);
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if (ret)
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goto fail_backlight;
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/* Register platform stuff */
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compal_device = platform_device_alloc("compal-laptop", -1);
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if (!compal_device) {
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ret = -ENOMEM;
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goto fail_platform_driver;
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}
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ret = platform_device_add(compal_device);
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if (ret)
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goto fail_platform_device1;
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ret = sysfs_create_group(&compal_device->dev.kobj,
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&compal_attribute_group);
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if (ret)
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goto fail_platform_device2;
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printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
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" successfully loaded.\n");
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return 0;
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fail_platform_device2:
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platform_device_del(compal_device);
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fail_platform_device1:
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platform_device_put(compal_device);
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fail_platform_driver:
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platform_driver_unregister(&compal_driver);
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fail_backlight:
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backlight_device_unregister(compalbl_device);
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return ret;
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}
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static void __exit compal_cleanup(void)
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{
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sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group);
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platform_device_unregister(compal_device);
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platform_driver_unregister(&compal_driver);
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backlight_device_unregister(compalbl_device);
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printk(KERN_INFO "compal-laptop: driver unloaded.\n");
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}
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module_init(compal_init);
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module_exit(compal_cleanup);
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MODULE_AUTHOR("Cezary Jackiewicz");
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MODULE_DESCRIPTION("Compal Laptop Support");
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MODULE_VERSION(COMPAL_DRIVER_VERSION);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("dmi:*:rnIFL90:rvrIFT00:*");
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MODULE_ALIAS("dmi:*:rnIFL90:rvrREFERENCE:*");
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MODULE_ALIAS("dmi:*:rnIFL91:rvrIFT00:*");
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MODULE_ALIAS("dmi:*:rnJFL92:rvrIFT00:*");
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MODULE_ALIAS("dmi:*:rnIFT00:rvrIFT00:*");
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