![Hans de Goede](/assets/img/avatar_default.png)
Installing the i8042 filter is not useful on machines where rfkill is not whitelisted, so move the filter installation into dell_setup_rfkill, after the whitelist check. This avoids doing a needless and potentially troublesome rfkill query (dell_send_request(buf, 17, 11)) when the wireless Fn key gets pressed on non whitelisted laptops. This patch was written as a result of: https://bugzilla.redhat.com/show_bug.cgi?id=1045807 It is not yet clear if this is related, but it is a good idea to not register the i8042 filter in general. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
930 lines
22 KiB
C
930 lines
22 KiB
C
/*
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* Driver for Dell laptop extras
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*
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* Copyright (c) Red Hat <mjg@redhat.com>
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*
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* Based on documentation in the libsmbios package, Copyright (C) 2005 Dell
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* Inc.
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*
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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/platform_device.h>
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#include <linux/backlight.h>
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#include <linux/err.h>
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#include <linux/dmi.h>
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#include <linux/io.h>
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#include <linux/rfkill.h>
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#include <linux/power_supply.h>
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#include <linux/acpi.h>
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#include <linux/mm.h>
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#include <linux/i8042.h>
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#include <linux/slab.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include "../../firmware/dcdbas.h"
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#define BRIGHTNESS_TOKEN 0x7d
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/* This structure will be modified by the firmware when we enter
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* system management mode, hence the volatiles */
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struct calling_interface_buffer {
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u16 class;
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u16 select;
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volatile u32 input[4];
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volatile u32 output[4];
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} __packed;
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struct calling_interface_token {
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u16 tokenID;
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u16 location;
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union {
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u16 value;
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u16 stringlength;
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};
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};
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struct calling_interface_structure {
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struct dmi_header header;
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u16 cmdIOAddress;
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u8 cmdIOCode;
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u32 supportedCmds;
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struct calling_interface_token tokens[];
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} __packed;
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struct quirk_entry {
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u8 touchpad_led;
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};
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static struct quirk_entry *quirks;
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static struct quirk_entry quirk_dell_vostro_v130 = {
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.touchpad_led = 1,
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};
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static int dmi_matched(const struct dmi_system_id *dmi)
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{
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quirks = dmi->driver_data;
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return 1;
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}
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static int da_command_address;
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static int da_command_code;
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static int da_num_tokens;
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static struct calling_interface_token *da_tokens;
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static struct platform_driver platform_driver = {
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.driver = {
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.name = "dell-laptop",
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.owner = THIS_MODULE,
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}
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};
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static struct platform_device *platform_device;
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static struct backlight_device *dell_backlight_device;
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static struct rfkill *wifi_rfkill;
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static struct rfkill *bluetooth_rfkill;
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static struct rfkill *wwan_rfkill;
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static bool force_rfkill;
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module_param(force_rfkill, bool, 0444);
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MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
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static const struct dmi_system_id dell_device_table[] __initconst = {
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{
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.ident = "Dell laptop",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
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},
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},
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{
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
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},
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},
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{
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.ident = "Dell Computer Corporation",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
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DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
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},
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},
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{ }
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};
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MODULE_DEVICE_TABLE(dmi, dell_device_table);
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static struct dmi_system_id dell_quirks[] = {
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro V130",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro V131",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro 3350",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro 3555",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron N311z",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron M5110",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro 3360",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro 3460",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro 3560",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Vostro 3450",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron 5420",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron 5520",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron 5720",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron 7420",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron 7520",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{
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.callback = dmi_matched,
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.ident = "Dell Inspiron 7720",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
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},
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.driver_data = &quirk_dell_vostro_v130,
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},
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{ }
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};
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static struct calling_interface_buffer *buffer;
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static struct page *bufferpage;
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static DEFINE_MUTEX(buffer_mutex);
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static int hwswitch_state;
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static void get_buffer(void)
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{
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mutex_lock(&buffer_mutex);
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memset(buffer, 0, sizeof(struct calling_interface_buffer));
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}
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static void release_buffer(void)
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{
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mutex_unlock(&buffer_mutex);
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}
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static void __init parse_da_table(const struct dmi_header *dm)
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{
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/* Final token is a terminator, so we don't want to copy it */
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int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
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struct calling_interface_token *new_da_tokens;
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struct calling_interface_structure *table =
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container_of(dm, struct calling_interface_structure, header);
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/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
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6 bytes of entry */
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if (dm->length < 17)
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return;
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da_command_address = table->cmdIOAddress;
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da_command_code = table->cmdIOCode;
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new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
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sizeof(struct calling_interface_token),
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GFP_KERNEL);
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if (!new_da_tokens)
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return;
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da_tokens = new_da_tokens;
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memcpy(da_tokens+da_num_tokens, table->tokens,
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sizeof(struct calling_interface_token) * tokens);
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da_num_tokens += tokens;
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}
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static void __init find_tokens(const struct dmi_header *dm, void *dummy)
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{
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switch (dm->type) {
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case 0xd4: /* Indexed IO */
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case 0xd5: /* Protected Area Type 1 */
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case 0xd6: /* Protected Area Type 2 */
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break;
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case 0xda: /* Calling interface */
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parse_da_table(dm);
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break;
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}
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}
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static int find_token_location(int tokenid)
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{
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int i;
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for (i = 0; i < da_num_tokens; i++) {
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if (da_tokens[i].tokenID == tokenid)
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return da_tokens[i].location;
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}
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return -1;
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}
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static struct calling_interface_buffer *
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dell_send_request(struct calling_interface_buffer *buffer, int class,
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int select)
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{
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struct smi_cmd command;
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command.magic = SMI_CMD_MAGIC;
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command.command_address = da_command_address;
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command.command_code = da_command_code;
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command.ebx = virt_to_phys(buffer);
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command.ecx = 0x42534931;
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buffer->class = class;
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buffer->select = select;
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dcdbas_smi_request(&command);
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return buffer;
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}
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/* Derived from information in DellWirelessCtl.cpp:
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Class 17, select 11 is radio control. It returns an array of 32-bit values.
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Input byte 0 = 0: Wireless information
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result[0]: return code
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result[1]:
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Bit 0: Hardware switch supported
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Bit 1: Wifi locator supported
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Bit 2: Wifi is supported
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Bit 3: Bluetooth is supported
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Bit 4: WWAN is supported
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Bit 5: Wireless keyboard supported
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Bits 6-7: Reserved
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Bit 8: Wifi is installed
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Bit 9: Bluetooth is installed
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Bit 10: WWAN is installed
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Bits 11-15: Reserved
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Bit 16: Hardware switch is on
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Bit 17: Wifi is blocked
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Bit 18: Bluetooth is blocked
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Bit 19: WWAN is blocked
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Bits 20-31: Reserved
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result[2]: NVRAM size in bytes
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result[3]: NVRAM format version number
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Input byte 0 = 2: Wireless switch configuration
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result[0]: return code
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result[1]:
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Bit 0: Wifi controlled by switch
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Bit 1: Bluetooth controlled by switch
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Bit 2: WWAN controlled by switch
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Bits 3-6: Reserved
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Bit 7: Wireless switch config locked
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Bit 8: Wifi locator enabled
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Bits 9-14: Reserved
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Bit 15: Wifi locator setting locked
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Bits 16-31: Reserved
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*/
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static int dell_rfkill_set(void *data, bool blocked)
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{
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int disable = blocked ? 1 : 0;
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unsigned long radio = (unsigned long)data;
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int hwswitch_bit = (unsigned long)data - 1;
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get_buffer();
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dell_send_request(buffer, 17, 11);
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/* If the hardware switch controls this radio, and the hardware
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switch is disabled, always disable the radio */
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if ((hwswitch_state & BIT(hwswitch_bit)) &&
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!(buffer->output[1] & BIT(16)))
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disable = 1;
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buffer->input[0] = (1 | (radio<<8) | (disable << 16));
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dell_send_request(buffer, 17, 11);
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release_buffer();
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return 0;
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}
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/* Must be called with the buffer held */
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static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
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int status)
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{
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if (status & BIT(0)) {
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/* Has hw-switch, sync sw_state to BIOS */
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int block = rfkill_blocked(rfkill);
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buffer->input[0] = (1 | (radio << 8) | (block << 16));
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dell_send_request(buffer, 17, 11);
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} else {
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/* No hw-switch, sync BIOS state to sw_state */
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rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
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}
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}
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static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
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int status)
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{
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if (hwswitch_state & (BIT(radio - 1)))
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rfkill_set_hw_state(rfkill, !(status & BIT(16)));
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}
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static void dell_rfkill_query(struct rfkill *rfkill, void *data)
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{
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int status;
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get_buffer();
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dell_send_request(buffer, 17, 11);
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status = buffer->output[1];
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dell_rfkill_update_hw_state(rfkill, (unsigned long)data, status);
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release_buffer();
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}
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static const struct rfkill_ops dell_rfkill_ops = {
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.set_block = dell_rfkill_set,
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.query = dell_rfkill_query,
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};
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static struct dentry *dell_laptop_dir;
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static int dell_debugfs_show(struct seq_file *s, void *data)
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{
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int status;
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get_buffer();
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dell_send_request(buffer, 17, 11);
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status = buffer->output[1];
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release_buffer();
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seq_printf(s, "status:\t0x%X\n", status);
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seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
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status & BIT(0));
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seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
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(status & BIT(1)) >> 1);
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seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
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(status & BIT(2)) >> 2);
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seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
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(status & BIT(3)) >> 3);
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seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
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(status & BIT(4)) >> 4);
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seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
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(status & BIT(5)) >> 5);
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seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
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(status & BIT(8)) >> 8);
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seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
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(status & BIT(9)) >> 9);
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seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
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(status & BIT(10)) >> 10);
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seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
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(status & BIT(16)) >> 16);
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seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
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(status & BIT(17)) >> 17);
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seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
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|
(status & BIT(18)) >> 18);
|
|
seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
|
|
(status & BIT(19)) >> 19);
|
|
|
|
seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
|
|
seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
|
|
hwswitch_state & BIT(0));
|
|
seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
|
|
(hwswitch_state & BIT(1)) >> 1);
|
|
seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
|
|
(hwswitch_state & BIT(2)) >> 2);
|
|
seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
|
|
(hwswitch_state & BIT(7)) >> 7);
|
|
seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
|
|
(hwswitch_state & BIT(8)) >> 8);
|
|
seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
|
|
(hwswitch_state & BIT(15)) >> 15);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dell_debugfs_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, dell_debugfs_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations dell_debugfs_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = dell_debugfs_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static void dell_update_rfkill(struct work_struct *ignored)
|
|
{
|
|
int status;
|
|
|
|
get_buffer();
|
|
dell_send_request(buffer, 17, 11);
|
|
status = buffer->output[1];
|
|
|
|
if (wifi_rfkill) {
|
|
dell_rfkill_update_hw_state(wifi_rfkill, 1, status);
|
|
dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
|
|
}
|
|
if (bluetooth_rfkill) {
|
|
dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status);
|
|
dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
|
|
}
|
|
if (wwan_rfkill) {
|
|
dell_rfkill_update_hw_state(wwan_rfkill, 3, status);
|
|
dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
|
|
}
|
|
|
|
release_buffer();
|
|
}
|
|
static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
|
|
|
|
static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
|
|
struct serio *port)
|
|
{
|
|
static bool extended;
|
|
|
|
if (str & 0x20)
|
|
return false;
|
|
|
|
if (unlikely(data == 0xe0)) {
|
|
extended = true;
|
|
return false;
|
|
} else if (unlikely(extended)) {
|
|
switch (data) {
|
|
case 0x8:
|
|
schedule_delayed_work(&dell_rfkill_work,
|
|
round_jiffies_relative(HZ / 4));
|
|
break;
|
|
}
|
|
extended = false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int __init dell_setup_rfkill(void)
|
|
{
|
|
int status, ret, whitelisted;
|
|
const char *product;
|
|
|
|
/*
|
|
* rfkill support causes trouble on various models, mostly Inspirons.
|
|
* So we whitelist certain series, and don't support rfkill on others.
|
|
*/
|
|
whitelisted = 0;
|
|
product = dmi_get_system_info(DMI_PRODUCT_NAME);
|
|
if (product && (strncmp(product, "Latitude", 8) == 0 ||
|
|
strncmp(product, "Precision", 9) == 0))
|
|
whitelisted = 1;
|
|
if (!force_rfkill && !whitelisted)
|
|
return 0;
|
|
|
|
get_buffer();
|
|
dell_send_request(buffer, 17, 11);
|
|
status = buffer->output[1];
|
|
buffer->input[0] = 0x2;
|
|
dell_send_request(buffer, 17, 11);
|
|
hwswitch_state = buffer->output[1];
|
|
release_buffer();
|
|
|
|
if (!(status & BIT(0))) {
|
|
if (force_rfkill) {
|
|
/* No hwsitch, clear all hw-controlled bits */
|
|
hwswitch_state &= ~7;
|
|
} else {
|
|
/* rfkill is only tested on laptops with a hwswitch */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
|
|
wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
|
|
RFKILL_TYPE_WLAN,
|
|
&dell_rfkill_ops, (void *) 1);
|
|
if (!wifi_rfkill) {
|
|
ret = -ENOMEM;
|
|
goto err_wifi;
|
|
}
|
|
ret = rfkill_register(wifi_rfkill);
|
|
if (ret)
|
|
goto err_wifi;
|
|
}
|
|
|
|
if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
|
|
bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
|
|
&platform_device->dev,
|
|
RFKILL_TYPE_BLUETOOTH,
|
|
&dell_rfkill_ops, (void *) 2);
|
|
if (!bluetooth_rfkill) {
|
|
ret = -ENOMEM;
|
|
goto err_bluetooth;
|
|
}
|
|
ret = rfkill_register(bluetooth_rfkill);
|
|
if (ret)
|
|
goto err_bluetooth;
|
|
}
|
|
|
|
if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
|
|
wwan_rfkill = rfkill_alloc("dell-wwan",
|
|
&platform_device->dev,
|
|
RFKILL_TYPE_WWAN,
|
|
&dell_rfkill_ops, (void *) 3);
|
|
if (!wwan_rfkill) {
|
|
ret = -ENOMEM;
|
|
goto err_wwan;
|
|
}
|
|
ret = rfkill_register(wwan_rfkill);
|
|
if (ret)
|
|
goto err_wwan;
|
|
}
|
|
|
|
ret = i8042_install_filter(dell_laptop_i8042_filter);
|
|
if (ret) {
|
|
pr_warn("Unable to install key filter\n");
|
|
goto err_filter;
|
|
}
|
|
|
|
return 0;
|
|
err_filter:
|
|
if (wwan_rfkill)
|
|
rfkill_unregister(wwan_rfkill);
|
|
err_wwan:
|
|
rfkill_destroy(wwan_rfkill);
|
|
if (bluetooth_rfkill)
|
|
rfkill_unregister(bluetooth_rfkill);
|
|
err_bluetooth:
|
|
rfkill_destroy(bluetooth_rfkill);
|
|
if (wifi_rfkill)
|
|
rfkill_unregister(wifi_rfkill);
|
|
err_wifi:
|
|
rfkill_destroy(wifi_rfkill);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void dell_cleanup_rfkill(void)
|
|
{
|
|
if (wifi_rfkill) {
|
|
rfkill_unregister(wifi_rfkill);
|
|
rfkill_destroy(wifi_rfkill);
|
|
}
|
|
if (bluetooth_rfkill) {
|
|
rfkill_unregister(bluetooth_rfkill);
|
|
rfkill_destroy(bluetooth_rfkill);
|
|
}
|
|
if (wwan_rfkill) {
|
|
rfkill_unregister(wwan_rfkill);
|
|
rfkill_destroy(wwan_rfkill);
|
|
}
|
|
}
|
|
|
|
static int dell_send_intensity(struct backlight_device *bd)
|
|
{
|
|
int ret = 0;
|
|
|
|
get_buffer();
|
|
buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
|
|
buffer->input[1] = bd->props.brightness;
|
|
|
|
if (buffer->input[0] == -1) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (power_supply_is_system_supplied() > 0)
|
|
dell_send_request(buffer, 1, 2);
|
|
else
|
|
dell_send_request(buffer, 1, 1);
|
|
|
|
out:
|
|
release_buffer();
|
|
return ret;
|
|
}
|
|
|
|
static int dell_get_intensity(struct backlight_device *bd)
|
|
{
|
|
int ret = 0;
|
|
|
|
get_buffer();
|
|
buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
|
|
|
|
if (buffer->input[0] == -1) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (power_supply_is_system_supplied() > 0)
|
|
dell_send_request(buffer, 0, 2);
|
|
else
|
|
dell_send_request(buffer, 0, 1);
|
|
|
|
ret = buffer->output[1];
|
|
|
|
out:
|
|
release_buffer();
|
|
return ret;
|
|
}
|
|
|
|
static const struct backlight_ops dell_ops = {
|
|
.get_brightness = dell_get_intensity,
|
|
.update_status = dell_send_intensity,
|
|
};
|
|
|
|
static void touchpad_led_on(void)
|
|
{
|
|
int command = 0x97;
|
|
char data = 1;
|
|
i8042_command(&data, command | 1 << 12);
|
|
}
|
|
|
|
static void touchpad_led_off(void)
|
|
{
|
|
int command = 0x97;
|
|
char data = 2;
|
|
i8042_command(&data, command | 1 << 12);
|
|
}
|
|
|
|
static void touchpad_led_set(struct led_classdev *led_cdev,
|
|
enum led_brightness value)
|
|
{
|
|
if (value > 0)
|
|
touchpad_led_on();
|
|
else
|
|
touchpad_led_off();
|
|
}
|
|
|
|
static struct led_classdev touchpad_led = {
|
|
.name = "dell-laptop::touchpad",
|
|
.brightness_set = touchpad_led_set,
|
|
.flags = LED_CORE_SUSPENDRESUME,
|
|
};
|
|
|
|
static int touchpad_led_init(struct device *dev)
|
|
{
|
|
return led_classdev_register(dev, &touchpad_led);
|
|
}
|
|
|
|
static void touchpad_led_exit(void)
|
|
{
|
|
led_classdev_unregister(&touchpad_led);
|
|
}
|
|
|
|
static int __init dell_init(void)
|
|
{
|
|
int max_intensity = 0;
|
|
int ret;
|
|
|
|
if (!dmi_check_system(dell_device_table))
|
|
return -ENODEV;
|
|
|
|
quirks = NULL;
|
|
/* find if this machine support other functions */
|
|
dmi_check_system(dell_quirks);
|
|
|
|
dmi_walk(find_tokens, NULL);
|
|
|
|
if (!da_tokens) {
|
|
pr_info("Unable to find dmi tokens\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = platform_driver_register(&platform_driver);
|
|
if (ret)
|
|
goto fail_platform_driver;
|
|
platform_device = platform_device_alloc("dell-laptop", -1);
|
|
if (!platform_device) {
|
|
ret = -ENOMEM;
|
|
goto fail_platform_device1;
|
|
}
|
|
ret = platform_device_add(platform_device);
|
|
if (ret)
|
|
goto fail_platform_device2;
|
|
|
|
/*
|
|
* Allocate buffer below 4GB for SMI data--only 32-bit physical addr
|
|
* is passed to SMI handler.
|
|
*/
|
|
bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32);
|
|
if (!bufferpage) {
|
|
ret = -ENOMEM;
|
|
goto fail_buffer;
|
|
}
|
|
buffer = page_address(bufferpage);
|
|
|
|
ret = dell_setup_rfkill();
|
|
|
|
if (ret) {
|
|
pr_warn("Unable to setup rfkill\n");
|
|
goto fail_rfkill;
|
|
}
|
|
|
|
if (quirks && quirks->touchpad_led)
|
|
touchpad_led_init(&platform_device->dev);
|
|
|
|
dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
|
|
if (dell_laptop_dir != NULL)
|
|
debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
|
|
&dell_debugfs_fops);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
/* In the event of an ACPI backlight being available, don't
|
|
* register the platform controller.
|
|
*/
|
|
if (acpi_video_backlight_support())
|
|
return 0;
|
|
#endif
|
|
|
|
get_buffer();
|
|
buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
|
|
if (buffer->input[0] != -1) {
|
|
dell_send_request(buffer, 0, 2);
|
|
max_intensity = buffer->output[3];
|
|
}
|
|
release_buffer();
|
|
|
|
if (max_intensity) {
|
|
struct backlight_properties props;
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
props.type = BACKLIGHT_PLATFORM;
|
|
props.max_brightness = max_intensity;
|
|
dell_backlight_device = backlight_device_register("dell_backlight",
|
|
&platform_device->dev,
|
|
NULL,
|
|
&dell_ops,
|
|
&props);
|
|
|
|
if (IS_ERR(dell_backlight_device)) {
|
|
ret = PTR_ERR(dell_backlight_device);
|
|
dell_backlight_device = NULL;
|
|
goto fail_backlight;
|
|
}
|
|
|
|
dell_backlight_device->props.brightness =
|
|
dell_get_intensity(dell_backlight_device);
|
|
backlight_update_status(dell_backlight_device);
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail_backlight:
|
|
i8042_remove_filter(dell_laptop_i8042_filter);
|
|
cancel_delayed_work_sync(&dell_rfkill_work);
|
|
dell_cleanup_rfkill();
|
|
fail_rfkill:
|
|
free_page((unsigned long)bufferpage);
|
|
fail_buffer:
|
|
platform_device_del(platform_device);
|
|
fail_platform_device2:
|
|
platform_device_put(platform_device);
|
|
fail_platform_device1:
|
|
platform_driver_unregister(&platform_driver);
|
|
fail_platform_driver:
|
|
kfree(da_tokens);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit dell_exit(void)
|
|
{
|
|
debugfs_remove_recursive(dell_laptop_dir);
|
|
if (quirks && quirks->touchpad_led)
|
|
touchpad_led_exit();
|
|
i8042_remove_filter(dell_laptop_i8042_filter);
|
|
cancel_delayed_work_sync(&dell_rfkill_work);
|
|
backlight_device_unregister(dell_backlight_device);
|
|
dell_cleanup_rfkill();
|
|
if (platform_device) {
|
|
platform_device_unregister(platform_device);
|
|
platform_driver_unregister(&platform_driver);
|
|
}
|
|
kfree(da_tokens);
|
|
free_page((unsigned long)buffer);
|
|
}
|
|
|
|
module_init(dell_init);
|
|
module_exit(dell_exit);
|
|
|
|
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
|
|
MODULE_DESCRIPTION("Dell laptop driver");
|
|
MODULE_LICENSE("GPL");
|