linux/drivers/platform/x86/eeepc-laptop.c

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/*
* eepc-laptop.c - Asus Eee PC extras
*
* Based on asus_acpi.c as patched for the Eee PC by Asus:
* ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
* Based on eee.c from eeepc-linux
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <linux/uaccess.h>
#include <linux/input.h>
#include <linux/rfkill.h>
#include <linux/pci.h>
#define EEEPC_LAPTOP_VERSION "0.1"
#define EEEPC_HOTK_NAME "Eee PC Hotkey Driver"
#define EEEPC_HOTK_FILE "eeepc"
#define EEEPC_HOTK_CLASS "hotkey"
#define EEEPC_HOTK_DEVICE_NAME "Hotkey"
#define EEEPC_HOTK_HID "ASUS010"
#define EEEPC_LOG EEEPC_HOTK_FILE ": "
#define EEEPC_ERR KERN_ERR EEEPC_LOG
#define EEEPC_WARNING KERN_WARNING EEEPC_LOG
#define EEEPC_NOTICE KERN_NOTICE EEEPC_LOG
#define EEEPC_INFO KERN_INFO EEEPC_LOG
/*
* Definitions for Asus EeePC
*/
#define NOTIFY_WLAN_ON 0x10
#define NOTIFY_BRN_MIN 0x20
#define NOTIFY_BRN_MAX 0x2f
enum {
DISABLE_ASL_WLAN = 0x0001,
DISABLE_ASL_BLUETOOTH = 0x0002,
DISABLE_ASL_IRDA = 0x0004,
DISABLE_ASL_CAMERA = 0x0008,
DISABLE_ASL_TV = 0x0010,
DISABLE_ASL_GPS = 0x0020,
DISABLE_ASL_DISPLAYSWITCH = 0x0040,
DISABLE_ASL_MODEM = 0x0080,
DISABLE_ASL_CARDREADER = 0x0100
};
enum {
CM_ASL_WLAN = 0,
CM_ASL_BLUETOOTH,
CM_ASL_IRDA,
CM_ASL_1394,
CM_ASL_CAMERA,
CM_ASL_TV,
CM_ASL_GPS,
CM_ASL_DVDROM,
CM_ASL_DISPLAYSWITCH,
CM_ASL_PANELBRIGHT,
CM_ASL_BIOSFLASH,
CM_ASL_ACPIFLASH,
CM_ASL_CPUFV,
CM_ASL_CPUTEMPERATURE,
CM_ASL_FANCPU,
CM_ASL_FANCHASSIS,
CM_ASL_USBPORT1,
CM_ASL_USBPORT2,
CM_ASL_USBPORT3,
CM_ASL_MODEM,
CM_ASL_CARDREADER,
CM_ASL_LID
};
static const char *cm_getv[] = {
"WLDG", "BTHG", NULL, NULL,
"CAMG", NULL, NULL, NULL,
NULL, "PBLG", NULL, NULL,
"CFVG", NULL, NULL, NULL,
"USBG", NULL, NULL, "MODG",
"CRDG", "LIDG"
};
static const char *cm_setv[] = {
"WLDS", "BTHS", NULL, NULL,
"CAMS", NULL, NULL, NULL,
"SDSP", "PBLS", "HDPS", NULL,
"CFVS", NULL, NULL, NULL,
"USBG", NULL, NULL, "MODS",
"CRDS", NULL
};
#define EEEPC_EC "\\_SB.PCI0.SBRG.EC0."
#define EEEPC_EC_FAN_PWM EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */
#define EEEPC_EC_SC02 0x63
#define EEEPC_EC_FAN_HRPM EEEPC_EC "SC05" /* High byte, fan speed (RPM) */
#define EEEPC_EC_FAN_LRPM EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */
#define EEEPC_EC_FAN_CTRL EEEPC_EC "SFB3" /* Byte containing SF25 */
#define EEEPC_EC_SFB3 0xD3
/*
* This is the main structure, we can use it to store useful information
* about the hotk device
*/
struct eeepc_hotk {
struct acpi_device *device; /* the device we are in */
acpi_handle handle; /* the handle of the hotk device */
u32 cm_supported; /* the control methods supported
by this BIOS */
uint init_flag; /* Init flags */
u16 event_count[128]; /* count for each event */
struct input_dev *inputdev;
u16 *keycode_map;
struct rfkill *eeepc_wlan_rfkill;
struct rfkill *eeepc_bluetooth_rfkill;
};
/* The actual device the driver binds to */
static struct eeepc_hotk *ehotk;
/* Platform device/driver */
static struct platform_driver platform_driver = {
.driver = {
.name = EEEPC_HOTK_FILE,
.owner = THIS_MODULE,
}
};
static struct platform_device *platform_device;
struct key_entry {
char type;
u8 code;
u16 keycode;
};
enum { KE_KEY, KE_END };
static struct key_entry eeepc_keymap[] = {
/* Sleep already handled via generic ACPI code */
{KE_KEY, 0x10, KEY_WLAN },
eeepc-laptop: Work around rfkill firmware bug 1) Buggy firmware can change the RFKILL state by itself. This is easily detected. The RFKILL API states that in such cases, we should call rfkill_force_state() to notify the core. I have reported the bug to Asus. I believe this is the right thing to do for robustness, even if this particular firmware bug is fixed. 2) The same bug causes the wireless toggle key to be reported as 0x11 instead of 0x10. 0x11 is otherwise unused, so it should be safe to add this as a new keycode. The bug is triggered by removing the laptop battery while hibernated. On resume, the wireless toggle key causes the firmware to toggle the wireless state itself. (Also, the key is reported as 0x11 when the current wireless state is OFF). This is very poor behaviour because the OS can't predict whether the firmware is controlling the RFKILL state. Without this workaround, the bug means users have to press the wireless toggle key twice to enable, due to the OS/firmware conflict. (Assuming rfkill-input or equivalent is being used). The workaround avoids this. I believe that acpid scripts which toggle the value of the sysfs state file when the toggle key is pressed will be rendered ineffective by the bug, regardless of this workaround. If they simply toggle the state, when the firmware has already toggled it, then you will never see a state change. Tested on "EEEPC 4G" only. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-27 07:23:39 +00:00
{KE_KEY, 0x11, KEY_WLAN },
{KE_KEY, 0x12, KEY_PROG1 },
{KE_KEY, 0x13, KEY_MUTE },
{KE_KEY, 0x14, KEY_VOLUMEDOWN },
{KE_KEY, 0x15, KEY_VOLUMEUP },
{KE_KEY, 0x1a, KEY_COFFEE },
{KE_KEY, 0x1b, KEY_ZOOM },
{KE_KEY, 0x1c, KEY_PROG2 },
{KE_KEY, 0x1d, KEY_PROG3 },
{KE_KEY, NOTIFY_BRN_MIN, KEY_BRIGHTNESSDOWN },
{KE_KEY, NOTIFY_BRN_MIN + 2, KEY_BRIGHTNESSUP },
{KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
{KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
{KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
{KE_END, 0},
};
/*
* The hotkey driver declaration
*/
static int eeepc_hotk_add(struct acpi_device *device);
static int eeepc_hotk_remove(struct acpi_device *device, int type);
static const struct acpi_device_id eeepc_device_ids[] = {
{EEEPC_HOTK_HID, 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
static struct acpi_driver eeepc_hotk_driver = {
.name = EEEPC_HOTK_NAME,
.class = EEEPC_HOTK_CLASS,
.ids = eeepc_device_ids,
.ops = {
.add = eeepc_hotk_add,
.remove = eeepc_hotk_remove,
},
};
/* The backlight device /sys/class/backlight */
static struct backlight_device *eeepc_backlight_device;
/* The hwmon device */
static struct device *eeepc_hwmon_device;
/*
* The backlight class declaration
*/
static int read_brightness(struct backlight_device *bd);
static int update_bl_status(struct backlight_device *bd);
static struct backlight_ops eeepcbl_ops = {
.get_brightness = read_brightness,
.update_status = update_bl_status,
};
MODULE_AUTHOR("Corentin Chary, Eric Cooper");
MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
MODULE_LICENSE("GPL");
/*
* ACPI Helpers
*/
static int write_acpi_int(acpi_handle handle, const char *method, int val,
struct acpi_buffer *output)
{
struct acpi_object_list params;
union acpi_object in_obj;
acpi_status status;
params.count = 1;
params.pointer = &in_obj;
in_obj.type = ACPI_TYPE_INTEGER;
in_obj.integer.value = val;
status = acpi_evaluate_object(handle, (char *)method, &params, output);
return (status == AE_OK ? 0 : -1);
}
static int read_acpi_int(acpi_handle handle, const char *method, int *val)
{
acpi_status status;
unsigned long long result;
status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
if (ACPI_FAILURE(status)) {
*val = -1;
return -1;
} else {
*val = result;
return 0;
}
}
static int set_acpi(int cm, int value)
{
if (ehotk->cm_supported & (0x1 << cm)) {
const char *method = cm_setv[cm];
if (method == NULL)
return -ENODEV;
if (write_acpi_int(ehotk->handle, method, value, NULL))
printk(EEEPC_WARNING "Error writing %s\n", method);
}
return 0;
}
static int get_acpi(int cm)
{
int value = -1;
if ((ehotk->cm_supported & (0x1 << cm))) {
const char *method = cm_getv[cm];
if (method == NULL)
return -ENODEV;
if (read_acpi_int(ehotk->handle, method, &value))
printk(EEEPC_WARNING "Error reading %s\n", method);
}
return value;
}
/*
* Backlight
*/
static int read_brightness(struct backlight_device *bd)
{
return get_acpi(CM_ASL_PANELBRIGHT);
}
static int set_brightness(struct backlight_device *bd, int value)
{
value = max(0, min(15, value));
return set_acpi(CM_ASL_PANELBRIGHT, value);
}
static int update_bl_status(struct backlight_device *bd)
{
return set_brightness(bd, bd->props.brightness);
}
/*
* Rfkill helpers
*/
static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
{
if (state == RFKILL_STATE_SOFT_BLOCKED)
return set_acpi(CM_ASL_WLAN, 0);
else
return set_acpi(CM_ASL_WLAN, 1);
}
static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
{
if (get_acpi(CM_ASL_WLAN) == 1)
*state = RFKILL_STATE_UNBLOCKED;
else
*state = RFKILL_STATE_SOFT_BLOCKED;
return 0;
}
static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
{
if (state == RFKILL_STATE_SOFT_BLOCKED)
return set_acpi(CM_ASL_BLUETOOTH, 0);
else
return set_acpi(CM_ASL_BLUETOOTH, 1);
}
static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
{
if (get_acpi(CM_ASL_BLUETOOTH) == 1)
*state = RFKILL_STATE_UNBLOCKED;
else
*state = RFKILL_STATE_SOFT_BLOCKED;
return 0;
}
/*
* Sys helpers
*/
static int parse_arg(const char *buf, unsigned long count, int *val)
{
if (!count)
return 0;
if (sscanf(buf, "%i", val) != 1)
return -EINVAL;
return count;
}
static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0)
set_acpi(cm, value);
return rv;
}
static ssize_t show_sys_acpi(int cm, char *buf)
{
return sprintf(buf, "%d\n", get_acpi(cm));
}
#define EEEPC_CREATE_DEVICE_ATTR(_name, _cm) \
static ssize_t show_##_name(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_sys_acpi(_cm, buf); \
} \
static ssize_t store_##_name(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return store_sys_acpi(_cm, buf, count); \
} \
static struct device_attribute dev_attr_##_name = { \
.attr = { \
.name = __stringify(_name), \
.mode = 0644 }, \
.show = show_##_name, \
.store = store_##_name, \
}
EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
static struct attribute *platform_attributes[] = {
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_disp.attr,
&dev_attr_cpufv.attr,
NULL
};
static struct attribute_group platform_attribute_group = {
.attrs = platform_attributes
};
/*
* Hotkey functions
*/
static struct key_entry *eepc_get_entry_by_scancode(int code)
{
struct key_entry *key;
for (key = eeepc_keymap; key->type != KE_END; key++)
if (code == key->code)
return key;
return NULL;
}
static struct key_entry *eepc_get_entry_by_keycode(int code)
{
struct key_entry *key;
for (key = eeepc_keymap; key->type != KE_END; key++)
if (code == key->keycode && key->type == KE_KEY)
return key;
return NULL;
}
static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
{
struct key_entry *key = eepc_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
*keycode = key->keycode;
return 0;
}
return -EINVAL;
}
static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
{
struct key_entry *key;
int old_keycode;
if (keycode < 0 || keycode > KEY_MAX)
return -EINVAL;
key = eepc_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
old_keycode = key->keycode;
key->keycode = keycode;
set_bit(keycode, dev->keybit);
if (!eepc_get_entry_by_keycode(old_keycode))
clear_bit(old_keycode, dev->keybit);
return 0;
}
return -EINVAL;
}
static int eeepc_hotk_check(void)
{
const struct key_entry *key;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
int result;
result = acpi_bus_get_status(ehotk->device);
if (result)
return result;
if (ehotk->device->status.present) {
if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
&buffer)) {
printk(EEEPC_ERR "Hotkey initialization failed\n");
return -ENODEV;
} else {
printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
ehotk->init_flag);
}
/* get control methods supported */
if (read_acpi_int(ehotk->handle, "CMSG"
, &ehotk->cm_supported)) {
printk(EEEPC_ERR
"Get control methods supported failed\n");
return -ENODEV;
} else {
printk(EEEPC_INFO
"Get control methods supported: 0x%x\n",
ehotk->cm_supported);
}
ehotk->inputdev = input_allocate_device();
if (!ehotk->inputdev) {
printk(EEEPC_INFO "Unable to allocate input device\n");
return 0;
}
ehotk->inputdev->name = "Asus EeePC extra buttons";
ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
ehotk->inputdev->id.bustype = BUS_HOST;
ehotk->inputdev->getkeycode = eeepc_getkeycode;
ehotk->inputdev->setkeycode = eeepc_setkeycode;
for (key = eeepc_keymap; key->type != KE_END; key++) {
switch (key->type) {
case KE_KEY:
set_bit(EV_KEY, ehotk->inputdev->evbit);
set_bit(key->keycode, ehotk->inputdev->keybit);
break;
}
}
result = input_register_device(ehotk->inputdev);
if (result) {
printk(EEEPC_INFO "Unable to register input device\n");
input_free_device(ehotk->inputdev);
return 0;
}
} else {
printk(EEEPC_ERR "Hotkey device not present, aborting\n");
return -EINVAL;
}
return 0;
}
static int notify_brn(void)
{
/* returns the *previous* brightness, or -1 */
struct backlight_device *bd = eeepc_backlight_device;
if (bd) {
int old = bd->props.brightness;
eeepc-laptop: fix oops when changing backlight brightness during eeepc-laptop init I got the following oops while changing the backlight brightness during startup. When it happens, it prevents use of the hotkeys, Fn-Fx, and the lid button. It's a clear use-before-init, as I verified by testing with an appropriately-placed "else printk". BUG: unable to handle kernel NULL pointer dereference at 00000000 *pde = 00000000 Oops: 0002 [#1] PREEMPT SMP Pid: 160, comm: kacpi_notify Not tainted (2.6.28.1-eee901 #4) 901 EIP: 0060:[<c0264e68>] [<c0264e68>] eeepc_hotk_notify+26/da EFLAGS: 00010246 CPU: 1 Using defaults from ksymoops -t elf32-i386 -a i386 EAX: 00000009 EBX: 00000000 ECX: 00000009 EDX: f70dbf64 ESI: 00000029 EDI: f7335188 EBP: c02112c9 ESP: f70dbf80 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 f70731e0 f73acd50 c02164ac f7335180 f70aa040 c02112e6 f733518c c012b62f f70aa044 f70aa040 c012bdba f70aa04c 00000000 c012be6e 00000000 f70bdf80 c012e198 f70dbfc4 f70dbfc4 f70aa040 c012bdba 00000000 c012e0c9 c012e091 Call Trace: [<c02164ac>] ? acpi_ev_notify_dispatch+4c/55 [<c02112e6>] ? acpi_os_execute_deferred+1d/25 [<c012b62f>] ? run_workqueue+71/f1 [<c012bdba>] ? worker_thread+0/bf [<c012be6e>] ? worker_thread+b4/bf [<c012e198>] ? autoremove_wake_function+0/2b [<c012bdba>] ? worker_thread+0/bf [<c012e0c9>] ? kthread+38/5f [<c012e091>] ? kthread+0/5f [<c0103abf>] ? kernel_thread_helper+7/10 Code: 00 00 00 00 c3 83 3d 60 5c 50 c0 00 56 89 d6 53 0f 84 c4 00 00 00 8d 42 e0 83 f8 0f 77 0f 8b 1d 68 5c 50 c0 89 d8 e8 a9 fa ff ff <89> 03 8b 1d 60 5c 50 c0 89 f2 83 e2 7f 0f b7 4c 53 10 8d 41 01 Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-02-07 06:02:07 +00:00
bd->props.brightness = read_brightness(bd);
return old;
}
return -1;
}
static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
{
eeepc-laptop: Work around rfkill firmware bug 1) Buggy firmware can change the RFKILL state by itself. This is easily detected. The RFKILL API states that in such cases, we should call rfkill_force_state() to notify the core. I have reported the bug to Asus. I believe this is the right thing to do for robustness, even if this particular firmware bug is fixed. 2) The same bug causes the wireless toggle key to be reported as 0x11 instead of 0x10. 0x11 is otherwise unused, so it should be safe to add this as a new keycode. The bug is triggered by removing the laptop battery while hibernated. On resume, the wireless toggle key causes the firmware to toggle the wireless state itself. (Also, the key is reported as 0x11 when the current wireless state is OFF). This is very poor behaviour because the OS can't predict whether the firmware is controlling the RFKILL state. Without this workaround, the bug means users have to press the wireless toggle key twice to enable, due to the OS/firmware conflict. (Assuming rfkill-input or equivalent is being used). The workaround avoids this. I believe that acpid scripts which toggle the value of the sysfs state file when the toggle key is pressed will be rendered ineffective by the bug, regardless of this workaround. If they simply toggle the state, when the firmware has already toggled it, then you will never see a state change. Tested on "EEEPC 4G" only. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-27 07:23:39 +00:00
enum rfkill_state state;
struct pci_dev *dev;
struct pci_bus *bus = pci_find_bus(0, 1);
if (event != ACPI_NOTIFY_BUS_CHECK)
return;
if (!bus) {
printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
return;
}
eeepc-laptop: Work around rfkill firmware bug 1) Buggy firmware can change the RFKILL state by itself. This is easily detected. The RFKILL API states that in such cases, we should call rfkill_force_state() to notify the core. I have reported the bug to Asus. I believe this is the right thing to do for robustness, even if this particular firmware bug is fixed. 2) The same bug causes the wireless toggle key to be reported as 0x11 instead of 0x10. 0x11 is otherwise unused, so it should be safe to add this as a new keycode. The bug is triggered by removing the laptop battery while hibernated. On resume, the wireless toggle key causes the firmware to toggle the wireless state itself. (Also, the key is reported as 0x11 when the current wireless state is OFF). This is very poor behaviour because the OS can't predict whether the firmware is controlling the RFKILL state. Without this workaround, the bug means users have to press the wireless toggle key twice to enable, due to the OS/firmware conflict. (Assuming rfkill-input or equivalent is being used). The workaround avoids this. I believe that acpid scripts which toggle the value of the sysfs state file when the toggle key is pressed will be rendered ineffective by the bug, regardless of this workaround. If they simply toggle the state, when the firmware has already toggled it, then you will never see a state change. Tested on "EEEPC 4G" only. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-27 07:23:39 +00:00
eeepc_wlan_rfkill_state(ehotk->eeepc_wlan_rfkill, &state);
if (state == RFKILL_STATE_UNBLOCKED) {
dev = pci_get_slot(bus, 0);
if (dev) {
/* Device already present */
pci_dev_put(dev);
return;
}
dev = pci_scan_single_device(bus, 0);
if (dev) {
pci_bus_assign_resources(bus);
if (pci_bus_add_device(dev))
printk(EEEPC_ERR "Unable to hotplug wifi\n");
}
} else {
dev = pci_get_slot(bus, 0);
if (dev) {
pci_remove_bus_device(dev);
pci_dev_put(dev);
}
}
eeepc-laptop: Work around rfkill firmware bug 1) Buggy firmware can change the RFKILL state by itself. This is easily detected. The RFKILL API states that in such cases, we should call rfkill_force_state() to notify the core. I have reported the bug to Asus. I believe this is the right thing to do for robustness, even if this particular firmware bug is fixed. 2) The same bug causes the wireless toggle key to be reported as 0x11 instead of 0x10. 0x11 is otherwise unused, so it should be safe to add this as a new keycode. The bug is triggered by removing the laptop battery while hibernated. On resume, the wireless toggle key causes the firmware to toggle the wireless state itself. (Also, the key is reported as 0x11 when the current wireless state is OFF). This is very poor behaviour because the OS can't predict whether the firmware is controlling the RFKILL state. Without this workaround, the bug means users have to press the wireless toggle key twice to enable, due to the OS/firmware conflict. (Assuming rfkill-input or equivalent is being used). The workaround avoids this. I believe that acpid scripts which toggle the value of the sysfs state file when the toggle key is pressed will be rendered ineffective by the bug, regardless of this workaround. If they simply toggle the state, when the firmware has already toggled it, then you will never see a state change. Tested on "EEEPC 4G" only. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-27 07:23:39 +00:00
rfkill_force_state(ehotk->eeepc_wlan_rfkill, state);
}
static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
{
static struct key_entry *key;
u16 count;
int brn = -ENODEV;
if (!ehotk)
return;
if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
brn = notify_brn();
count = ehotk->event_count[event % 128]++;
acpi_bus_generate_proc_event(ehotk->device, event, count);
acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
dev_name(&ehotk->device->dev), event,
count);
if (ehotk->inputdev) {
if (brn != -ENODEV) {
/* brightness-change events need special
* handling for conversion to key events
*/
if (brn < 0)
brn = event;
else
brn += NOTIFY_BRN_MIN;
if (event < brn)
event = NOTIFY_BRN_MIN; /* brightness down */
else if (event > brn)
event = NOTIFY_BRN_MIN + 2; /* ... up */
else
event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
}
key = eepc_get_entry_by_scancode(event);
if (key) {
switch (key->type) {
case KE_KEY:
input_report_key(ehotk->inputdev, key->keycode,
1);
input_sync(ehotk->inputdev);
input_report_key(ehotk->inputdev, key->keycode,
0);
input_sync(ehotk->inputdev);
break;
}
}
}
}
static int eeepc_register_rfkill_notifier(char *node)
{
acpi_status status = AE_OK;
acpi_handle handle;
status = acpi_get_handle(NULL, node, &handle);
if (ACPI_SUCCESS(status)) {
status = acpi_install_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
eeepc_rfkill_notify,
NULL);
if (ACPI_FAILURE(status))
printk(EEEPC_WARNING
"Failed to register notify on %s\n", node);
} else
return -ENODEV;
return 0;
}
static void eeepc_unregister_rfkill_notifier(char *node)
{
acpi_status status = AE_OK;
acpi_handle handle;
status = acpi_get_handle(NULL, node, &handle);
if (ACPI_SUCCESS(status)) {
status = acpi_remove_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
eeepc_rfkill_notify);
if (ACPI_FAILURE(status))
printk(EEEPC_ERR
"Error removing rfkill notify handler %s\n",
node);
}
}
static int eeepc_hotk_add(struct acpi_device *device)
{
acpi_status status = AE_OK;
int result;
if (!device)
return -EINVAL;
printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
if (!ehotk)
return -ENOMEM;
ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
ehotk->handle = device->handle;
strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
device->driver_data = ehotk;
ehotk->device = device;
result = eeepc_hotk_check();
if (result)
goto ehotk_fail;
status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
eeepc_hotk_notify, ehotk);
if (ACPI_FAILURE(status))
printk(EEEPC_ERR "Error installing notify handler\n");
eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
if (get_acpi(CM_ASL_WLAN) != -1) {
ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
RFKILL_TYPE_WLAN);
if (!ehotk->eeepc_wlan_rfkill)
goto wlan_fail;
ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
if (get_acpi(CM_ASL_WLAN) == 1) {
ehotk->eeepc_wlan_rfkill->state =
RFKILL_STATE_UNBLOCKED;
rfkill_set_default(RFKILL_TYPE_WLAN,
RFKILL_STATE_UNBLOCKED);
} else {
ehotk->eeepc_wlan_rfkill->state =
RFKILL_STATE_SOFT_BLOCKED;
rfkill_set_default(RFKILL_TYPE_WLAN,
RFKILL_STATE_SOFT_BLOCKED);
}
result = rfkill_register(ehotk->eeepc_wlan_rfkill);
if (result)
goto wlan_fail;
}
if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
ehotk->eeepc_bluetooth_rfkill =
rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
if (!ehotk->eeepc_bluetooth_rfkill)
goto bluetooth_fail;
ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
ehotk->eeepc_bluetooth_rfkill->toggle_radio =
eeepc_bluetooth_rfkill_set;
ehotk->eeepc_bluetooth_rfkill->get_state =
eeepc_bluetooth_rfkill_state;
if (get_acpi(CM_ASL_BLUETOOTH) == 1) {
ehotk->eeepc_bluetooth_rfkill->state =
RFKILL_STATE_UNBLOCKED;
rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
RFKILL_STATE_UNBLOCKED);
} else {
ehotk->eeepc_bluetooth_rfkill->state =
RFKILL_STATE_SOFT_BLOCKED;
rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
RFKILL_STATE_SOFT_BLOCKED);
}
result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
if (result)
goto bluetooth_fail;
}
return 0;
bluetooth_fail:
if (ehotk->eeepc_bluetooth_rfkill)
rfkill_free(ehotk->eeepc_bluetooth_rfkill);
rfkill_unregister(ehotk->eeepc_wlan_rfkill);
ehotk->eeepc_wlan_rfkill = NULL;
wlan_fail:
if (ehotk->eeepc_wlan_rfkill)
rfkill_free(ehotk->eeepc_wlan_rfkill);
eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
ehotk_fail:
kfree(ehotk);
ehotk = NULL;
return result;
}
static int eeepc_hotk_remove(struct acpi_device *device, int type)
{
acpi_status status = 0;
if (!device || !acpi_driver_data(device))
return -EINVAL;
status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
eeepc_hotk_notify);
if (ACPI_FAILURE(status))
printk(EEEPC_ERR "Error removing notify handler\n");
eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
kfree(ehotk);
return 0;
}
/*
* Hwmon
*/
static int eeepc_get_fan_pwm(void)
{
int value = 0;
read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
value = value * 255 / 100;
return (value);
}
static void eeepc_set_fan_pwm(int value)
{
value = SENSORS_LIMIT(value, 0, 255);
value = value * 100 / 255;
ec_write(EEEPC_EC_SC02, value);
}
static int eeepc_get_fan_rpm(void)
{
int high = 0;
int low = 0;
read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
return (high << 8 | low);
}
static int eeepc_get_fan_ctrl(void)
{
int value = 0;
read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
return ((value & 0x02 ? 1 : 0));
}
static void eeepc_set_fan_ctrl(int manual)
{
int value = 0;
read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
if (manual)
value |= 0x02;
else
value &= ~0x02;
ec_write(EEEPC_EC_SFB3, value);
}
static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0)
set(value);
return rv;
}
static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
{
return sprintf(buf, "%d\n", get());
}
#define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
static ssize_t show_##_name(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_sys_hwmon(_set, buf); \
} \
static ssize_t store_##_name(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return store_sys_hwmon(_get, buf, count); \
} \
static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
eeepc_get_fan_pwm, eeepc_set_fan_pwm);
EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
static ssize_t
show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "eeepc\n");
}
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
&sensor_dev_attr_name.dev_attr.attr,
NULL
};
static struct attribute_group hwmon_attribute_group = {
.attrs = hwmon_attributes
};
/*
* exit/init
*/
static void eeepc_backlight_exit(void)
{
if (eeepc_backlight_device)
backlight_device_unregister(eeepc_backlight_device);
eeepc_backlight_device = NULL;
}
static void eeepc_rfkill_exit(void)
{
if (ehotk->eeepc_wlan_rfkill)
rfkill_unregister(ehotk->eeepc_wlan_rfkill);
if (ehotk->eeepc_bluetooth_rfkill)
rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
}
static void eeepc_input_exit(void)
{
if (ehotk->inputdev)
input_unregister_device(ehotk->inputdev);
}
static void eeepc_hwmon_exit(void)
{
struct device *hwmon;
hwmon = eeepc_hwmon_device;
if (!hwmon)
return ;
sysfs_remove_group(&hwmon->kobj,
&hwmon_attribute_group);
hwmon_device_unregister(hwmon);
eeepc_hwmon_device = NULL;
}
static void __exit eeepc_laptop_exit(void)
{
eeepc_backlight_exit();
eeepc_rfkill_exit();
eeepc_input_exit();
eeepc_hwmon_exit();
acpi_bus_unregister_driver(&eeepc_hotk_driver);
sysfs_remove_group(&platform_device->dev.kobj,
&platform_attribute_group);
platform_device_unregister(platform_device);
platform_driver_unregister(&platform_driver);
}
static int eeepc_backlight_init(struct device *dev)
{
struct backlight_device *bd;
bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
NULL, &eeepcbl_ops);
if (IS_ERR(bd)) {
printk(EEEPC_ERR
"Could not register eeepc backlight device\n");
eeepc_backlight_device = NULL;
return PTR_ERR(bd);
}
eeepc_backlight_device = bd;
bd->props.max_brightness = 15;
bd->props.brightness = read_brightness(NULL);
bd->props.power = FB_BLANK_UNBLANK;
backlight_update_status(bd);
return 0;
}
static int eeepc_hwmon_init(struct device *dev)
{
struct device *hwmon;
int result;
hwmon = hwmon_device_register(dev);
if (IS_ERR(hwmon)) {
printk(EEEPC_ERR
"Could not register eeepc hwmon device\n");
eeepc_hwmon_device = NULL;
return PTR_ERR(hwmon);
}
eeepc_hwmon_device = hwmon;
result = sysfs_create_group(&hwmon->kobj,
&hwmon_attribute_group);
if (result)
eeepc_hwmon_exit();
return result;
}
static int __init eeepc_laptop_init(void)
{
struct device *dev;
int result;
if (acpi_disabled)
return -ENODEV;
result = acpi_bus_register_driver(&eeepc_hotk_driver);
if (result < 0)
return result;
if (!ehotk) {
acpi_bus_unregister_driver(&eeepc_hotk_driver);
return -ENODEV;
}
dev = acpi_get_physical_device(ehotk->device->handle);
if (!acpi_video_backlight_support()) {
result = eeepc_backlight_init(dev);
if (result)
goto fail_backlight;
} else
printk(EEEPC_INFO "Backlight controlled by ACPI video "
"driver\n");
result = eeepc_hwmon_init(dev);
if (result)
goto fail_hwmon;
/* Register platform stuff */
result = platform_driver_register(&platform_driver);
if (result)
goto fail_platform_driver;
platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
if (!platform_device) {
result = -ENOMEM;
goto fail_platform_device1;
}
result = platform_device_add(platform_device);
if (result)
goto fail_platform_device2;
result = sysfs_create_group(&platform_device->dev.kobj,
&platform_attribute_group);
if (result)
goto fail_sysfs;
return 0;
fail_sysfs:
platform_device_del(platform_device);
fail_platform_device2:
platform_device_put(platform_device);
fail_platform_device1:
platform_driver_unregister(&platform_driver);
fail_platform_driver:
eeepc_hwmon_exit();
fail_hwmon:
eeepc_backlight_exit();
fail_backlight:
eeepc_input_exit();
eeepc_rfkill_exit();
return result;
}
module_init(eeepc_laptop_init);
module_exit(eeepc_laptop_exit);