2011-03-11 17:41:19 +00:00
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/*
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* Samsung Laptop driver
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*
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* Copyright (C) 2009,2011 Greg Kroah-Hartman (gregkh@suse.de)
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* Copyright (C) 2009,2011 Novell Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/backlight.h>
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#include <linux/fb.h>
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#include <linux/dmi.h>
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#include <linux/platform_device.h>
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#include <linux/rfkill.h>
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/*
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* This driver is needed because a number of Samsung laptops do not hook
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* their control settings through ACPI. So we have to poke around in the
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* BIOS to do things like brightness values, and "special" key controls.
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*/
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/*
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* We have 0 - 8 as valid brightness levels. The specs say that level 0 should
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* be reserved by the BIOS (which really doesn't make much sense), we tell
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* userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
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*/
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#define MAX_BRIGHT 0x07
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#define SABI_IFACE_MAIN 0x00
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#define SABI_IFACE_SUB 0x02
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#define SABI_IFACE_COMPLETE 0x04
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#define SABI_IFACE_DATA 0x05
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/* Structure to get data back to the calling function */
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struct sabi_retval {
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u8 retval[20];
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};
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struct sabi_header_offsets {
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u8 port;
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u8 re_mem;
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u8 iface_func;
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u8 en_mem;
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u8 data_offset;
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u8 data_segment;
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};
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struct sabi_commands {
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/*
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* Brightness is 0 - 8, as described above.
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* Value 0 is for the BIOS to use
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*/
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u8 get_brightness;
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u8 set_brightness;
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/*
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* first byte:
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* 0x00 - wireless is off
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* 0x01 - wireless is on
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* second byte:
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* 0x02 - 3G is off
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* 0x03 - 3G is on
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* TODO, verify 3G is correct, that doesn't seem right...
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*/
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u8 get_wireless_button;
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u8 set_wireless_button;
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/* 0 is off, 1 is on */
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u8 get_backlight;
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u8 set_backlight;
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/*
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* 0x80 or 0x00 - no action
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* 0x81 - recovery key pressed
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*/
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u8 get_recovery_mode;
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u8 set_recovery_mode;
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/*
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* on seclinux: 0 is low, 1 is high,
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* on swsmi: 0 is normal, 1 is silent, 2 is turbo
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*/
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u8 get_performance_level;
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u8 set_performance_level;
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/*
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* Tell the BIOS that Linux is running on this machine.
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* 81 is on, 80 is off
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*/
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u8 set_linux;
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};
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struct sabi_performance_level {
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const char *name;
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u8 value;
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};
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struct sabi_config {
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const char *test_string;
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u16 main_function;
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const struct sabi_header_offsets header_offsets;
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const struct sabi_commands commands;
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const struct sabi_performance_level performance_levels[4];
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u8 min_brightness;
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u8 max_brightness;
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};
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static const struct sabi_config sabi_configs[] = {
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{
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.test_string = "SECLINUX",
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.main_function = 0x4c49,
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.header_offsets = {
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.port = 0x00,
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.re_mem = 0x02,
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.iface_func = 0x03,
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.en_mem = 0x04,
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.data_offset = 0x05,
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.data_segment = 0x07,
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},
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.commands = {
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.get_brightness = 0x00,
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.set_brightness = 0x01,
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.get_wireless_button = 0x02,
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.set_wireless_button = 0x03,
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.get_backlight = 0x04,
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.set_backlight = 0x05,
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.get_recovery_mode = 0x06,
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.set_recovery_mode = 0x07,
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.get_performance_level = 0x08,
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.set_performance_level = 0x09,
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.set_linux = 0x0a,
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},
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.performance_levels = {
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{
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.name = "silent",
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.value = 0,
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},
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{
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.name = "normal",
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.value = 1,
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},
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{ },
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},
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.min_brightness = 1,
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.max_brightness = 8,
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},
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{
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.test_string = "SwSmi@",
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.main_function = 0x5843,
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.header_offsets = {
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.port = 0x00,
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.re_mem = 0x04,
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.iface_func = 0x02,
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.en_mem = 0x03,
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.data_offset = 0x05,
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.data_segment = 0x07,
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},
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.commands = {
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.get_brightness = 0x10,
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.set_brightness = 0x11,
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.get_wireless_button = 0x12,
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.set_wireless_button = 0x13,
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.get_backlight = 0x2d,
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.set_backlight = 0x2e,
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.get_recovery_mode = 0xff,
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.set_recovery_mode = 0xff,
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.get_performance_level = 0x31,
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.set_performance_level = 0x32,
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.set_linux = 0xff,
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},
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.performance_levels = {
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{
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.name = "normal",
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.value = 0,
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},
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{
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.name = "silent",
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.value = 1,
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},
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{
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.name = "overclock",
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.value = 2,
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},
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{ },
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},
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.min_brightness = 0,
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.max_brightness = 8,
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},
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{ },
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};
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static const struct sabi_config *sabi_config;
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static void __iomem *sabi;
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static void __iomem *sabi_iface;
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static void __iomem *f0000_segment;
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static struct backlight_device *backlight_device;
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static struct mutex sabi_mutex;
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static struct platform_device *sdev;
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static struct rfkill *rfk;
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static int force;
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module_param(force, bool, 0);
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MODULE_PARM_DESC(force,
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"Disable the DMI check and forces the driver to be loaded");
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static int debug;
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module_param(debug, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Debug enabled or not");
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static int sabi_get_command(u8 command, struct sabi_retval *sretval)
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{
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int retval = 0;
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u16 port = readw(sabi + sabi_config->header_offsets.port);
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u8 complete, iface_data;
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mutex_lock(&sabi_mutex);
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/* enable memory to be able to write to it */
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outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
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/* write out the command */
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writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
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writew(command, sabi_iface + SABI_IFACE_SUB);
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writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
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outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
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/* write protect memory to make it safe */
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outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
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/* see if the command actually succeeded */
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complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
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iface_data = readb(sabi_iface + SABI_IFACE_DATA);
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if (complete != 0xaa || iface_data == 0xff) {
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pr_warn("SABI get command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
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command, complete, iface_data);
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retval = -EINVAL;
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goto exit;
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}
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/*
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* Save off the data into a structure so the caller use it.
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* Right now we only want the first 4 bytes,
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* There are commands that need more, but not for the ones we
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* currently care about.
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*/
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sretval->retval[0] = readb(sabi_iface + SABI_IFACE_DATA);
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sretval->retval[1] = readb(sabi_iface + SABI_IFACE_DATA + 1);
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sretval->retval[2] = readb(sabi_iface + SABI_IFACE_DATA + 2);
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sretval->retval[3] = readb(sabi_iface + SABI_IFACE_DATA + 3);
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exit:
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mutex_unlock(&sabi_mutex);
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return retval;
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}
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static int sabi_set_command(u8 command, u8 data)
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{
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int retval = 0;
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u16 port = readw(sabi + sabi_config->header_offsets.port);
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u8 complete, iface_data;
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mutex_lock(&sabi_mutex);
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/* enable memory to be able to write to it */
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outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
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/* write out the command */
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writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
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writew(command, sabi_iface + SABI_IFACE_SUB);
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writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
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writeb(data, sabi_iface + SABI_IFACE_DATA);
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outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
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/* write protect memory to make it safe */
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outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
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/* see if the command actually succeeded */
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complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
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iface_data = readb(sabi_iface + SABI_IFACE_DATA);
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if (complete != 0xaa || iface_data == 0xff) {
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pr_warn("SABI set command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
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command, complete, iface_data);
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retval = -EINVAL;
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}
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mutex_unlock(&sabi_mutex);
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return retval;
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}
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static void test_backlight(void)
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{
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struct sabi_retval sretval;
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sabi_get_command(sabi_config->commands.get_backlight, &sretval);
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printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
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sabi_set_command(sabi_config->commands.set_backlight, 0);
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printk(KERN_DEBUG "backlight should be off\n");
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sabi_get_command(sabi_config->commands.get_backlight, &sretval);
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printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
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msleep(1000);
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sabi_set_command(sabi_config->commands.set_backlight, 1);
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printk(KERN_DEBUG "backlight should be on\n");
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sabi_get_command(sabi_config->commands.get_backlight, &sretval);
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printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
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}
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static void test_wireless(void)
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{
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struct sabi_retval sretval;
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sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
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printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
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sabi_set_command(sabi_config->commands.set_wireless_button, 0);
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printk(KERN_DEBUG "wireless led should be off\n");
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sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
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printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
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msleep(1000);
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sabi_set_command(sabi_config->commands.set_wireless_button, 1);
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printk(KERN_DEBUG "wireless led should be on\n");
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sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
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printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
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}
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static u8 read_brightness(void)
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{
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struct sabi_retval sretval;
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int user_brightness = 0;
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int retval;
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retval = sabi_get_command(sabi_config->commands.get_brightness,
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&sretval);
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if (!retval) {
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user_brightness = sretval.retval[0];
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if (user_brightness != 0)
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user_brightness -= sabi_config->min_brightness;
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}
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return user_brightness;
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}
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|
static void set_brightness(u8 user_brightness)
|
|
|
|
{
|
|
|
|
u8 user_level = user_brightness - sabi_config->min_brightness;
|
|
|
|
|
|
|
|
sabi_set_command(sabi_config->commands.set_brightness, user_level);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int get_brightness(struct backlight_device *bd)
|
|
|
|
{
|
|
|
|
return (int)read_brightness();
|
|
|
|
}
|
|
|
|
|
|
|
|
static int update_status(struct backlight_device *bd)
|
|
|
|
{
|
|
|
|
set_brightness(bd->props.brightness);
|
|
|
|
|
|
|
|
if (bd->props.power == FB_BLANK_UNBLANK)
|
|
|
|
sabi_set_command(sabi_config->commands.set_backlight, 1);
|
|
|
|
else
|
|
|
|
sabi_set_command(sabi_config->commands.set_backlight, 0);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct backlight_ops backlight_ops = {
|
|
|
|
.get_brightness = get_brightness,
|
|
|
|
.update_status = update_status,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int rfkill_set(void *data, bool blocked)
|
|
|
|
{
|
|
|
|
/* Do something with blocked...*/
|
|
|
|
/*
|
|
|
|
* blocked == false is on
|
|
|
|
* blocked == true is off
|
|
|
|
*/
|
|
|
|
if (blocked)
|
|
|
|
sabi_set_command(sabi_config->commands.set_wireless_button, 0);
|
|
|
|
else
|
|
|
|
sabi_set_command(sabi_config->commands.set_wireless_button, 1);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct rfkill_ops rfkill_ops = {
|
|
|
|
.set_block = rfkill_set,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int init_wireless(struct platform_device *sdev)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
rfk = rfkill_alloc("samsung-wifi", &sdev->dev, RFKILL_TYPE_WLAN,
|
|
|
|
&rfkill_ops, NULL);
|
|
|
|
if (!rfk)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
retval = rfkill_register(rfk);
|
|
|
|
if (retval) {
|
|
|
|
rfkill_destroy(rfk);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void destroy_wireless(void)
|
|
|
|
{
|
|
|
|
rfkill_unregister(rfk);
|
|
|
|
rfkill_destroy(rfk);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t get_performance_level(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct sabi_retval sretval;
|
|
|
|
int retval;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* Read the state */
|
|
|
|
retval = sabi_get_command(sabi_config->commands.get_performance_level,
|
|
|
|
&sretval);
|
|
|
|
if (retval)
|
|
|
|
return retval;
|
|
|
|
|
|
|
|
/* The logic is backwards, yeah, lots of fun... */
|
|
|
|
for (i = 0; sabi_config->performance_levels[i].name; ++i) {
|
|
|
|
if (sretval.retval[0] == sabi_config->performance_levels[i].value)
|
|
|
|
return sprintf(buf, "%s\n", sabi_config->performance_levels[i].name);
|
|
|
|
}
|
|
|
|
return sprintf(buf, "%s\n", "unknown");
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t set_performance_level(struct device *dev,
|
|
|
|
struct device_attribute *attr, const char *buf,
|
|
|
|
size_t count)
|
|
|
|
{
|
|
|
|
if (count >= 1) {
|
|
|
|
int i;
|
|
|
|
for (i = 0; sabi_config->performance_levels[i].name; ++i) {
|
|
|
|
const struct sabi_performance_level *level =
|
|
|
|
&sabi_config->performance_levels[i];
|
|
|
|
if (!strncasecmp(level->name, buf, strlen(level->name))) {
|
|
|
|
sabi_set_command(sabi_config->commands.set_performance_level,
|
|
|
|
level->value);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!sabi_config->performance_levels[i].name)
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
|
|
|
|
get_performance_level, set_performance_level);
|
|
|
|
|
|
|
|
|
|
|
|
static int __init dmi_check_cb(const struct dmi_system_id *id)
|
|
|
|
{
|
|
|
|
pr_info("found laptop model '%s'\n",
|
|
|
|
id->ident);
|
2011-03-14 10:56:18 +00:00
|
|
|
return 1;
|
2011-03-11 17:41:19 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct dmi_system_id __initdata samsung_dmi_table[] = {
|
|
|
|
{
|
|
|
|
.ident = "N128",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "N128"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "N128"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "N130",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "N130"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "N130"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "X125",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "X125"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "X125"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "X120/X170",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "X120/X170"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "X120/X170"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "NC10",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "NC10"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "NP-Q45",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "SQ45S70S"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "X360",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "X360"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "R518",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "R518"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "R518"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "R519/R719",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "R519/R719"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "R519/R719"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "N150/N210/N220",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "N150P/N210P/N220P",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "N150P/N210P/N220P"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "N150P/N210P/N220P"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "R530/R730",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "R530/R730"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "R530/R730"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "NF110/NF210/NF310",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "N145P/N250P/N260P",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "R70/R71",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "R70/R71"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "R70/R71"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.ident = "P460",
|
|
|
|
.matches = {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
|
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "P460"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "P460"),
|
|
|
|
},
|
|
|
|
.callback = dmi_check_cb,
|
|
|
|
},
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
|
|
|
|
|
|
|
|
static int find_signature(void __iomem *memcheck, const char *testStr)
|
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
int loca;
|
|
|
|
|
|
|
|
for (loca = 0; loca < 0xffff; loca++) {
|
|
|
|
char temp = readb(memcheck + loca);
|
|
|
|
|
|
|
|
if (temp == testStr[i]) {
|
|
|
|
if (i == strlen(testStr)-1)
|
|
|
|
break;
|
|
|
|
++i;
|
|
|
|
} else {
|
|
|
|
i = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return loca;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init samsung_init(void)
|
|
|
|
{
|
|
|
|
struct backlight_properties props;
|
|
|
|
struct sabi_retval sretval;
|
|
|
|
unsigned int ifaceP;
|
|
|
|
int i;
|
|
|
|
int loca;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
mutex_init(&sabi_mutex);
|
|
|
|
|
|
|
|
if (!force && !dmi_check_system(samsung_dmi_table))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
f0000_segment = ioremap_nocache(0xf0000, 0xffff);
|
|
|
|
if (!f0000_segment) {
|
|
|
|
pr_err("Can't map the segment at 0xf0000\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Try to find one of the signatures in memory to find the header */
|
|
|
|
for (i = 0; sabi_configs[i].test_string != 0; ++i) {
|
|
|
|
sabi_config = &sabi_configs[i];
|
|
|
|
loca = find_signature(f0000_segment, sabi_config->test_string);
|
|
|
|
if (loca != 0xffff)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (loca == 0xffff) {
|
|
|
|
pr_err("This computer does not support SABI\n");
|
|
|
|
goto error_no_signature;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* point to the SMI port Number */
|
|
|
|
loca += 1;
|
|
|
|
sabi = (f0000_segment + loca);
|
|
|
|
|
|
|
|
if (debug) {
|
|
|
|
printk(KERN_DEBUG "This computer supports SABI==%x\n",
|
|
|
|
loca + 0xf0000 - 6);
|
|
|
|
printk(KERN_DEBUG "SABI header:\n");
|
|
|
|
printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
|
|
|
|
readw(sabi + sabi_config->header_offsets.port));
|
|
|
|
printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
|
|
|
|
readb(sabi + sabi_config->header_offsets.iface_func));
|
|
|
|
printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
|
|
|
|
readb(sabi + sabi_config->header_offsets.en_mem));
|
|
|
|
printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
|
|
|
|
readb(sabi + sabi_config->header_offsets.re_mem));
|
|
|
|
printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
|
|
|
|
readw(sabi + sabi_config->header_offsets.data_offset));
|
|
|
|
printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
|
|
|
|
readw(sabi + sabi_config->header_offsets.data_segment));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get a pointer to the SABI Interface */
|
|
|
|
ifaceP = (readw(sabi + sabi_config->header_offsets.data_segment) & 0x0ffff) << 4;
|
|
|
|
ifaceP += readw(sabi + sabi_config->header_offsets.data_offset) & 0x0ffff;
|
|
|
|
sabi_iface = ioremap_nocache(ifaceP, 16);
|
|
|
|
if (!sabi_iface) {
|
|
|
|
pr_err("Can't remap %x\n", ifaceP);
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
if (debug) {
|
|
|
|
printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP);
|
|
|
|
printk(KERN_DEBUG "sabi_iface = %p\n", sabi_iface);
|
|
|
|
|
|
|
|
test_backlight();
|
|
|
|
test_wireless();
|
|
|
|
|
|
|
|
retval = sabi_get_command(sabi_config->commands.get_brightness,
|
|
|
|
&sretval);
|
|
|
|
printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Turn on "Linux" mode in the BIOS */
|
|
|
|
if (sabi_config->commands.set_linux != 0xff) {
|
|
|
|
retval = sabi_set_command(sabi_config->commands.set_linux,
|
|
|
|
0x81);
|
|
|
|
if (retval) {
|
|
|
|
pr_warn("Linux mode was not set!\n");
|
|
|
|
goto error_no_platform;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* knock up a platform device to hang stuff off of */
|
|
|
|
sdev = platform_device_register_simple("samsung", -1, NULL, 0);
|
|
|
|
if (IS_ERR(sdev))
|
|
|
|
goto error_no_platform;
|
|
|
|
|
|
|
|
/* create a backlight device to talk to this one */
|
|
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
|
|
props.max_brightness = sabi_config->max_brightness;
|
|
|
|
backlight_device = backlight_device_register("samsung", &sdev->dev,
|
|
|
|
NULL, &backlight_ops,
|
|
|
|
&props);
|
|
|
|
if (IS_ERR(backlight_device))
|
|
|
|
goto error_no_backlight;
|
|
|
|
|
|
|
|
backlight_device->props.brightness = read_brightness();
|
|
|
|
backlight_device->props.power = FB_BLANK_UNBLANK;
|
|
|
|
backlight_update_status(backlight_device);
|
|
|
|
|
|
|
|
retval = init_wireless(sdev);
|
|
|
|
if (retval)
|
|
|
|
goto error_no_rfk;
|
|
|
|
|
|
|
|
retval = device_create_file(&sdev->dev, &dev_attr_performance_level);
|
|
|
|
if (retval)
|
|
|
|
goto error_file_create;
|
|
|
|
|
|
|
|
exit:
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error_file_create:
|
|
|
|
destroy_wireless();
|
|
|
|
|
|
|
|
error_no_rfk:
|
|
|
|
backlight_device_unregister(backlight_device);
|
|
|
|
|
|
|
|
error_no_backlight:
|
|
|
|
platform_device_unregister(sdev);
|
|
|
|
|
|
|
|
error_no_platform:
|
|
|
|
iounmap(sabi_iface);
|
|
|
|
|
|
|
|
error_no_signature:
|
|
|
|
iounmap(f0000_segment);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit samsung_exit(void)
|
|
|
|
{
|
|
|
|
/* Turn off "Linux" mode in the BIOS */
|
|
|
|
if (sabi_config->commands.set_linux != 0xff)
|
|
|
|
sabi_set_command(sabi_config->commands.set_linux, 0x80);
|
|
|
|
|
|
|
|
device_remove_file(&sdev->dev, &dev_attr_performance_level);
|
|
|
|
backlight_device_unregister(backlight_device);
|
|
|
|
destroy_wireless();
|
|
|
|
iounmap(sabi_iface);
|
|
|
|
iounmap(f0000_segment);
|
|
|
|
platform_device_unregister(sdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(samsung_init);
|
|
|
|
module_exit(samsung_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
|
|
|
|
MODULE_DESCRIPTION("Samsung Backlight driver");
|
|
|
|
MODULE_LICENSE("GPL");
|