linux/drivers/platform/x86/eeepc-laptop.c
Alan Jenkins bc9d24a3ae eeepc-laptop: check wireless hotplug events
Before we mark the wireless device as unplugged, check PCI config space
to see whether the wireless device is really disabled (and vice versa).
This works around newer models which don't want the hotplug code, where
we end up disabling the wired network device.

My old 701 still works correctly with this.  I can also simulate an
afflicted model by changing the hardcoded PCI bus/slot number in the
driver, and it seems to work nicely (although it is a bit noisy).

In future this type of hotplug support will be implemented by the PCI
core.  The existing blacklist and the new warning message will be
removed at that point.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
2010-02-28 19:30:57 +01:00

1523 lines
36 KiB
C

/*
* eeepc-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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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/input/sparse-keymap.h>
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/leds.h>
#include <linux/dmi.h>
#define EEEPC_LAPTOP_VERSION "0.1"
#define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
#define EEEPC_LAPTOP_FILE "eeepc"
#define EEEPC_ACPI_CLASS "hotkey"
#define EEEPC_ACPI_DEVICE_NAME "Hotkey"
#define EEEPC_ACPI_HID "ASUS010"
MODULE_AUTHOR("Corentin Chary, Eric Cooper");
MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
MODULE_LICENSE("GPL");
static bool hotplug_disabled;
module_param(hotplug_disabled, bool, 0644);
MODULE_PARM_DESC(hotplug_disabled,
"Disable hotplug for wireless device. "
"If your laptop need that, please report to "
"acpi4asus-user@lists.sourceforge.net.");
/*
* Definitions for Asus EeePC
*/
#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,
DISABLE_ASL_3G = 0x0200,
DISABLE_ASL_WIMAX = 0x0400,
DISABLE_ASL_HWCF = 0x0800
};
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_3G,
CM_ASL_WIMAX,
CM_ASL_HWCF,
CM_ASL_LID,
CM_ASL_TYPE,
CM_ASL_PANELPOWER, /*P901*/
CM_ASL_TPD
};
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", "M3GG", "WIMG", "HWCF",
"LIDG", "TYPE", "PBPG", "TPDG"
};
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", "M3GS", "WIMS", NULL,
NULL, NULL, "PBPS", "TPDS"
};
static const struct key_entry eeepc_keymap[] = {
{ KE_KEY, 0x10, { KEY_WLAN } },
{ 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, 0x16, { KEY_DISPLAY_OFF } },
{ 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_MAX, { KEY_BRIGHTNESSUP } },
{ KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
{ KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
{ KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
{ KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
{ KE_KEY, 0x38, { KEY_F14 } },
{ KE_END, 0 },
};
/*
* This is the main structure, we can use it to store useful information
*/
struct eeepc_laptop {
acpi_handle handle; /* the handle of the acpi device */
u32 cm_supported; /* the control methods supported
by this BIOS */
bool cpufv_disabled;
bool hotplug_disabled;
u16 event_count[128]; /* count for each event */
struct platform_device *platform_device;
struct device *hwmon_device;
struct backlight_device *backlight_device;
struct input_dev *inputdev;
struct key_entry *keymap;
struct rfkill *wlan_rfkill;
struct rfkill *bluetooth_rfkill;
struct rfkill *wwan3g_rfkill;
struct rfkill *wimax_rfkill;
struct hotplug_slot *hotplug_slot;
struct mutex hotplug_lock;
struct led_classdev tpd_led;
int tpd_led_wk;
struct workqueue_struct *led_workqueue;
struct work_struct tpd_led_work;
};
/*
* ACPI Helpers
*/
static int write_acpi_int(acpi_handle handle, const char *method, int val)
{
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, NULL);
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(struct eeepc_laptop *eeepc, int cm, int value)
{
const char *method = cm_setv[cm];
if (method == NULL)
return -ENODEV;
if ((eeepc->cm_supported & (0x1 << cm)) == 0)
return -ENODEV;
if (write_acpi_int(eeepc->handle, method, value))
pr_warning("Error writing %s\n", method);
return 0;
}
static int get_acpi(struct eeepc_laptop *eeepc, int cm)
{
const char *method = cm_getv[cm];
int value;
if (method == NULL)
return -ENODEV;
if ((eeepc->cm_supported & (0x1 << cm)) == 0)
return -ENODEV;
if (read_acpi_int(eeepc->handle, method, &value))
pr_warning("Error reading %s\n", method);
return value;
}
static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
acpi_handle *handle)
{
const char *method = cm_setv[cm];
acpi_status status;
if (method == NULL)
return -ENODEV;
if ((eeepc->cm_supported & (0x1 << cm)) == 0)
return -ENODEV;
status = acpi_get_handle(eeepc->handle, (char *)method,
handle);
if (status != AE_OK) {
pr_warning("Error finding %s\n", method);
return -ENODEV;
}
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(struct device *dev, int cm,
const char *buf, size_t count)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0)
value = set_acpi(eeepc, cm, value);
if (value < 0)
return -EIO;
return rv;
}
static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
int value = get_acpi(eeepc, cm);
if (value < 0)
return -EIO;
return sprintf(buf, "%d\n", value);
}
#define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
static ssize_t show_##_name(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_sys_acpi(dev, _cm, buf); \
} \
static ssize_t store_##_name(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return store_sys_acpi(dev, _cm, buf, count); \
} \
static struct device_attribute dev_attr_##_name = { \
.attr = { \
.name = __stringify(_name), \
.mode = _mode }, \
.show = show_##_name, \
.store = store_##_name, \
}
EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
struct eeepc_cpufv {
int num;
int cur;
};
static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
{
c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
c->num = (c->cur >> 8) & 0xff;
c->cur &= 0xff;
if (c->cur < 0 || c->num <= 0 || c->num > 12)
return -ENODEV;
return 0;
}
static ssize_t show_available_cpufv(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
struct eeepc_cpufv c;
int i;
ssize_t len = 0;
if (get_cpufv(eeepc, &c))
return -ENODEV;
for (i = 0; i < c.num; i++)
len += sprintf(buf + len, "%d ", i);
len += sprintf(buf + len, "\n");
return len;
}
static ssize_t show_cpufv(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
struct eeepc_cpufv c;
if (get_cpufv(eeepc, &c))
return -ENODEV;
return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
}
static ssize_t store_cpufv(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
struct eeepc_cpufv c;
int rv, value;
if (eeepc->cpufv_disabled)
return -EPERM;
if (get_cpufv(eeepc, &c))
return -ENODEV;
rv = parse_arg(buf, count, &value);
if (rv < 0)
return rv;
if (!rv || value < 0 || value >= c.num)
return -EINVAL;
set_acpi(eeepc, CM_ASL_CPUFV, value);
return rv;
}
static ssize_t show_cpufv_disabled(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
}
static ssize_t store_cpufv_disabled(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv < 0)
return rv;
switch (value) {
case 0:
if (eeepc->cpufv_disabled)
pr_warning("cpufv enabled (not officially supported "
"on this model)\n");
eeepc->cpufv_disabled = false;
return rv;
case 1:
return -EPERM;
default:
return -EINVAL;
}
}
static struct device_attribute dev_attr_cpufv = {
.attr = {
.name = "cpufv",
.mode = 0644 },
.show = show_cpufv,
.store = store_cpufv
};
static struct device_attribute dev_attr_available_cpufv = {
.attr = {
.name = "available_cpufv",
.mode = 0444 },
.show = show_available_cpufv
};
static struct device_attribute dev_attr_cpufv_disabled = {
.attr = {
.name = "cpufv_disabled",
.mode = 0644 },
.show = show_cpufv_disabled,
.store = store_cpufv_disabled
};
static struct attribute *platform_attributes[] = {
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_disp.attr,
&dev_attr_cpufv.attr,
&dev_attr_available_cpufv.attr,
&dev_attr_cpufv_disabled.attr,
NULL
};
static struct attribute_group platform_attribute_group = {
.attrs = platform_attributes
};
static int eeepc_platform_init(struct eeepc_laptop *eeepc)
{
int result;
eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
if (!eeepc->platform_device)
return -ENOMEM;
platform_set_drvdata(eeepc->platform_device, eeepc);
result = platform_device_add(eeepc->platform_device);
if (result)
goto fail_platform_device;
result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
&platform_attribute_group);
if (result)
goto fail_sysfs;
return 0;
fail_sysfs:
platform_device_del(eeepc->platform_device);
fail_platform_device:
platform_device_put(eeepc->platform_device);
return result;
}
static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
{
sysfs_remove_group(&eeepc->platform_device->dev.kobj,
&platform_attribute_group);
platform_device_unregister(eeepc->platform_device);
}
/*
* LEDs
*/
/*
* These functions actually update the LED's, and are called from a
* workqueue. By doing this as separate work rather than when the LED
* subsystem asks, we avoid messing with the Asus ACPI stuff during a
* potentially bad time, such as a timer interrupt.
*/
static void tpd_led_update(struct work_struct *work)
{
struct eeepc_laptop *eeepc;
eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
}
static void tpd_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct eeepc_laptop *eeepc;
eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
}
static int eeepc_led_init(struct eeepc_laptop *eeepc)
{
int rv;
if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
return 0;
eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
if (!eeepc->led_workqueue)
return -ENOMEM;
INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
eeepc->tpd_led.name = "eeepc::touchpad";
eeepc->tpd_led.brightness_set = tpd_led_set;
eeepc->tpd_led.max_brightness = 1;
rv = led_classdev_register(&eeepc->platform_device->dev,
&eeepc->tpd_led);
if (rv) {
destroy_workqueue(eeepc->led_workqueue);
return rv;
}
return 0;
}
static void eeepc_led_exit(struct eeepc_laptop *eeepc)
{
if (eeepc->tpd_led.dev)
led_classdev_unregister(&eeepc->tpd_led);
if (eeepc->led_workqueue)
destroy_workqueue(eeepc->led_workqueue);
}
/*
* PCI hotplug (for wlan rfkill)
*/
static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
{
if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
return false;
return true;
}
static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc)
{
struct pci_dev *dev;
struct pci_bus *bus;
bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
bool absent;
u32 l;
if (eeepc->wlan_rfkill)
rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
mutex_lock(&eeepc->hotplug_lock);
if (eeepc->hotplug_slot) {
bus = pci_find_bus(0, 1);
if (!bus) {
pr_warning("Unable to find PCI bus 1?\n");
goto out_unlock;
}
if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
pr_err("Unable to read PCI config space?\n");
goto out_unlock;
}
absent = (l == 0xffffffff);
if (blocked != absent) {
pr_warning("BIOS says wireless lan is %s, "
"but the pci device is %s\n",
blocked ? "blocked" : "unblocked",
absent ? "absent" : "present");
pr_warning("skipped wireless hotplug as probably "
"inappropriate for this model\n");
goto out_unlock;
}
if (!blocked) {
dev = pci_get_slot(bus, 0);
if (dev) {
/* Device already present */
pci_dev_put(dev);
goto out_unlock;
}
dev = pci_scan_single_device(bus, 0);
if (dev) {
pci_bus_assign_resources(bus);
if (pci_bus_add_device(dev))
pr_err("Unable to hotplug wifi\n");
}
} else {
dev = pci_get_slot(bus, 0);
if (dev) {
pci_remove_bus_device(dev);
pci_dev_put(dev);
}
}
}
out_unlock:
mutex_unlock(&eeepc->hotplug_lock);
}
static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
{
struct eeepc_laptop *eeepc = data;
if (event != ACPI_NOTIFY_BUS_CHECK)
return;
eeepc_rfkill_hotplug(eeepc);
}
static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
char *node)
{
acpi_status status;
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,
eeepc);
if (ACPI_FAILURE(status))
pr_warning("Failed to register notify on %s\n", node);
} else
return -ENODEV;
return 0;
}
static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
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))
pr_err("Error removing rfkill notify handler %s\n",
node);
}
}
static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
u8 *value)
{
struct eeepc_laptop *eeepc = hotplug_slot->private;
int val = get_acpi(eeepc, CM_ASL_WLAN);
if (val == 1 || val == 0)
*value = val;
else
return -EINVAL;
return 0;
}
static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
{
kfree(hotplug_slot->info);
kfree(hotplug_slot);
}
static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
.owner = THIS_MODULE,
.get_adapter_status = eeepc_get_adapter_status,
.get_power_status = eeepc_get_adapter_status,
};
static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
{
int ret = -ENOMEM;
struct pci_bus *bus = pci_find_bus(0, 1);
if (!bus) {
pr_err("Unable to find wifi PCI bus\n");
return -ENODEV;
}
eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
if (!eeepc->hotplug_slot)
goto error_slot;
eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
GFP_KERNEL);
if (!eeepc->hotplug_slot->info)
goto error_info;
eeepc->hotplug_slot->private = eeepc;
eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
eeepc_get_adapter_status(eeepc->hotplug_slot,
&eeepc->hotplug_slot->info->adapter_status);
ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
if (ret) {
pr_err("Unable to register hotplug slot - %d\n", ret);
goto error_register;
}
return 0;
error_register:
kfree(eeepc->hotplug_slot->info);
error_info:
kfree(eeepc->hotplug_slot);
eeepc->hotplug_slot = NULL;
error_slot:
return ret;
}
/*
* Rfkill devices
*/
static int eeepc_rfkill_set(void *data, bool blocked)
{
acpi_handle handle = data;
return write_acpi_int(handle, NULL, !blocked);
}
static const struct rfkill_ops eeepc_rfkill_ops = {
.set_block = eeepc_rfkill_set,
};
static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
struct rfkill **rfkill,
const char *name,
enum rfkill_type type, int cm)
{
acpi_handle handle;
int result;
result = acpi_setter_handle(eeepc, cm, &handle);
if (result < 0)
return result;
*rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
&eeepc_rfkill_ops, handle);
if (!*rfkill)
return -EINVAL;
rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
result = rfkill_register(*rfkill);
if (result) {
rfkill_destroy(*rfkill);
*rfkill = NULL;
return result;
}
return 0;
}
static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
{
eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
if (eeepc->wlan_rfkill) {
rfkill_unregister(eeepc->wlan_rfkill);
rfkill_destroy(eeepc->wlan_rfkill);
eeepc->wlan_rfkill = NULL;
}
/*
* Refresh pci hotplug in case the rfkill state was changed after
* eeepc_unregister_rfkill_notifier()
*/
eeepc_rfkill_hotplug(eeepc);
if (eeepc->hotplug_slot)
pci_hp_deregister(eeepc->hotplug_slot);
if (eeepc->bluetooth_rfkill) {
rfkill_unregister(eeepc->bluetooth_rfkill);
rfkill_destroy(eeepc->bluetooth_rfkill);
eeepc->bluetooth_rfkill = NULL;
}
if (eeepc->wwan3g_rfkill) {
rfkill_unregister(eeepc->wwan3g_rfkill);
rfkill_destroy(eeepc->wwan3g_rfkill);
eeepc->wwan3g_rfkill = NULL;
}
if (eeepc->wimax_rfkill) {
rfkill_unregister(eeepc->wimax_rfkill);
rfkill_destroy(eeepc->wimax_rfkill);
eeepc->wimax_rfkill = NULL;
}
}
static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
{
int result = 0;
mutex_init(&eeepc->hotplug_lock);
result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
"eeepc-wlan", RFKILL_TYPE_WLAN,
CM_ASL_WLAN);
if (result && result != -ENODEV)
goto exit;
result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
"eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
CM_ASL_BLUETOOTH);
if (result && result != -ENODEV)
goto exit;
result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
"eeepc-wwan3g", RFKILL_TYPE_WWAN,
CM_ASL_3G);
if (result && result != -ENODEV)
goto exit;
result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
"eeepc-wimax", RFKILL_TYPE_WIMAX,
CM_ASL_WIMAX);
if (result && result != -ENODEV)
goto exit;
if (eeepc->hotplug_disabled)
return 0;
result = eeepc_setup_pci_hotplug(eeepc);
/*
* If we get -EBUSY then something else is handling the PCI hotplug -
* don't fail in this case
*/
if (result == -EBUSY)
result = 0;
eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
/*
* Refresh pci hotplug in case the rfkill state was changed during
* setup.
*/
eeepc_rfkill_hotplug(eeepc);
exit:
if (result && result != -ENODEV)
eeepc_rfkill_exit(eeepc);
return result;
}
/*
* Platform driver - hibernate/resume callbacks
*/
static int eeepc_hotk_thaw(struct device *device)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(device);
if (eeepc->wlan_rfkill) {
bool wlan;
/*
* Work around bios bug - acpi _PTS turns off the wireless led
* during suspend. Normally it restores it on resume, but
* we should kick it ourselves in case hibernation is aborted.
*/
wlan = get_acpi(eeepc, CM_ASL_WLAN);
set_acpi(eeepc, CM_ASL_WLAN, wlan);
}
return 0;
}
static int eeepc_hotk_restore(struct device *device)
{
struct eeepc_laptop *eeepc = dev_get_drvdata(device);
/* Refresh both wlan rfkill state and pci hotplug */
if (eeepc->wlan_rfkill)
eeepc_rfkill_hotplug(eeepc);
if (eeepc->bluetooth_rfkill)
rfkill_set_sw_state(eeepc->bluetooth_rfkill,
get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
if (eeepc->wwan3g_rfkill)
rfkill_set_sw_state(eeepc->wwan3g_rfkill,
get_acpi(eeepc, CM_ASL_3G) != 1);
if (eeepc->wimax_rfkill)
rfkill_set_sw_state(eeepc->wimax_rfkill,
get_acpi(eeepc, CM_ASL_WIMAX) != 1);
return 0;
}
static const struct dev_pm_ops eeepc_pm_ops = {
.thaw = eeepc_hotk_thaw,
.restore = eeepc_hotk_restore,
};
static struct platform_driver platform_driver = {
.driver = {
.name = EEEPC_LAPTOP_FILE,
.owner = THIS_MODULE,
.pm = &eeepc_pm_ops,
}
};
/*
* Hwmon device
*/
#define EEEPC_EC_SC00 0x61
#define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
#define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
#define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
#define EEEPC_EC_SFB0 0xD0
#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
static int eeepc_get_fan_pwm(void)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_PWM, &value);
return value * 255 / 100;
}
static void eeepc_set_fan_pwm(int value)
{
value = SENSORS_LIMIT(value, 0, 255);
value = value * 100 / 255;
ec_write(EEEPC_EC_FAN_PWM, value);
}
static int eeepc_get_fan_rpm(void)
{
u8 high = 0;
u8 low = 0;
ec_read(EEEPC_EC_FAN_HRPM, &high);
ec_read(EEEPC_EC_FAN_LRPM, &low);
return high << 8 | low;
}
static int eeepc_get_fan_ctrl(void)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_CTRL, &value);
if (value & 0x02)
return 1; /* manual */
else
return 2; /* automatic */
}
static void eeepc_set_fan_ctrl(int manual)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_CTRL, &value);
if (manual == 1)
value |= 0x02;
else
value &= ~0x02;
ec_write(EEEPC_EC_FAN_CTRL, 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
};
static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
{
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 int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
{
struct device *hwmon;
int result;
hwmon = hwmon_device_register(&eeepc->platform_device->dev);
if (IS_ERR(hwmon)) {
pr_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(eeepc);
return result;
}
/*
* Backlight device
*/
static int read_brightness(struct backlight_device *bd)
{
struct eeepc_laptop *eeepc = bl_get_data(bd);
return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
}
static int set_brightness(struct backlight_device *bd, int value)
{
struct eeepc_laptop *eeepc = bl_get_data(bd);
return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
}
static int update_bl_status(struct backlight_device *bd)
{
return set_brightness(bd, bd->props.brightness);
}
static struct backlight_ops eeepcbl_ops = {
.get_brightness = read_brightness,
.update_status = update_bl_status,
};
static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
{
struct backlight_device *bd = eeepc->backlight_device;
int old = bd->props.brightness;
backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
return old;
}
static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
{
struct backlight_device *bd;
bd = backlight_device_register(EEEPC_LAPTOP_FILE,
&eeepc->platform_device->dev,
eeepc, &eeepcbl_ops);
if (IS_ERR(bd)) {
pr_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(bd);
bd->props.power = FB_BLANK_UNBLANK;
backlight_update_status(bd);
return 0;
}
static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
{
if (eeepc->backlight_device)
backlight_device_unregister(eeepc->backlight_device);
eeepc->backlight_device = NULL;
}
/*
* Input device (i.e. hotkeys)
*/
static int eeepc_input_init(struct eeepc_laptop *eeepc)
{
struct input_dev *input;
int error;
input = input_allocate_device();
if (!input) {
pr_info("Unable to allocate input device\n");
return -ENOMEM;
}
input->name = "Asus EeePC extra buttons";
input->phys = EEEPC_LAPTOP_FILE "/input0";
input->id.bustype = BUS_HOST;
input->dev.parent = &eeepc->platform_device->dev;
error = sparse_keymap_setup(input, eeepc_keymap, NULL);
if (error) {
pr_err("Unable to setup input device keymap\n");
goto err_free_dev;
}
error = input_register_device(input);
if (error) {
pr_err("Unable to register input device\n");
goto err_free_keymap;
}
eeepc->inputdev = input;
return 0;
err_free_keymap:
sparse_keymap_free(input);
err_free_dev:
input_free_device(input);
return error;
}
static void eeepc_input_exit(struct eeepc_laptop *eeepc)
{
if (eeepc->inputdev) {
input_unregister_device(eeepc->inputdev);
kfree(eeepc->keymap);
}
}
/*
* ACPI driver
*/
static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
{
struct eeepc_laptop *eeepc = acpi_driver_data(device);
u16 count;
if (event > ACPI_MAX_SYS_NOTIFY)
return;
count = eeepc->event_count[event % 128]++;
acpi_bus_generate_proc_event(device, event, count);
acpi_bus_generate_netlink_event(device->pnp.device_class,
dev_name(&device->dev), event,
count);
/* Brightness events are special */
if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
/* Ignore them completely if the acpi video driver is used */
if (eeepc->backlight_device != NULL) {
int old_brightness, new_brightness;
/* Update the backlight device. */
old_brightness = eeepc_backlight_notify(eeepc);
/* Convert event to keypress (obsolescent hack) */
new_brightness = event - NOTIFY_BRN_MIN;
if (new_brightness < old_brightness) {
event = NOTIFY_BRN_MIN; /* brightness down */
} else if (new_brightness > old_brightness) {
event = NOTIFY_BRN_MAX; /* brightness up */
} else {
/*
* no change in brightness - already at min/max,
* event will be desired value (or else ignored)
*/
}
sparse_keymap_report_event(eeepc->inputdev, event,
1, true);
}
} else {
/* Everything else is a bona-fide keypress event */
sparse_keymap_report_event(eeepc->inputdev, event, 1, true);
}
}
static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
{
const char *model;
model = dmi_get_system_info(DMI_PRODUCT_NAME);
if (!model)
return;
/*
* Blacklist for setting cpufv (cpu speed).
*
* EeePC 4G ("701") implements CFVS, but it is not supported
* by the pre-installed OS, and the original option to change it
* in the BIOS setup screen was removed in later versions.
*
* Judging by the lack of "Super Hybrid Engine" on Asus product pages,
* this applies to all "701" models (4G/4G Surf/2G Surf).
*
* So Asus made a deliberate decision not to support it on this model.
* We have several reports that using it can cause the system to hang
*
* The hang has also been reported on a "702" (Model name "8G"?).
*
* We avoid dmi_check_system() / dmi_match(), because they use
* substring matching. We don't want to affect the "701SD"
* and "701SDX" models, because they do support S.H.E.
*/
if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
eeepc->cpufv_disabled = true;
pr_info("model %s does not officially support setting cpu "
"speed\n", model);
pr_info("cpufv disabled to avoid instability\n");
}
/*
* Blacklist for wlan hotplug
*
* Eeepc 1005HA doesn't work like others models and don't need the
* hotplug code. In fact, current hotplug code seems to unplug another
* device...
*/
if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
strcmp(model, "1005PE") == 0) {
eeepc->hotplug_disabled = true;
pr_info("wlan hotplug disabled\n");
}
}
static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
{
int dummy;
/* Some BIOSes do not report cm although it is avaliable.
Check if cm_getv[cm] works and, if yes, assume cm should be set. */
if (!(eeepc->cm_supported & (1 << cm))
&& !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
pr_info("%s (%x) not reported by BIOS,"
" enabling anyway\n", name, 1 << cm);
eeepc->cm_supported |= 1 << cm;
}
}
static void cmsg_quirks(struct eeepc_laptop *eeepc)
{
cmsg_quirk(eeepc, CM_ASL_LID, "LID");
cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
}
static int eeepc_acpi_init(struct eeepc_laptop *eeepc,
struct acpi_device *device)
{
unsigned int init_flags;
int result;
result = acpi_bus_get_status(device);
if (result)
return result;
if (!device->status.present) {
pr_err("Hotkey device not present, aborting\n");
return -ENODEV;
}
init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
pr_notice("Hotkey init flags 0x%x\n", init_flags);
if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
pr_err("Hotkey initialization failed\n");
return -ENODEV;
}
/* get control methods supported */
if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
pr_err("Get control methods supported failed\n");
return -ENODEV;
}
cmsg_quirks(eeepc);
pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
return 0;
}
static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
{
/*
* If the following call to set_acpi() fails, it's because there's no
* camera so we can ignore the error.
*/
if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
set_acpi(eeepc, CM_ASL_CAMERA, 1);
}
static bool eeepc_device_present;
static int __devinit eeepc_acpi_add(struct acpi_device *device)
{
struct eeepc_laptop *eeepc;
int result;
pr_notice(EEEPC_LAPTOP_NAME "\n");
eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
if (!eeepc)
return -ENOMEM;
eeepc->handle = device->handle;
strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
device->driver_data = eeepc;
eeepc->hotplug_disabled = hotplug_disabled;
eeepc_dmi_check(eeepc);
result = eeepc_acpi_init(eeepc, device);
if (result)
goto fail_platform;
eeepc_enable_camera(eeepc);
/*
* Register the platform device first. It is used as a parent for the
* sub-devices below.
*
* Note that if there are multiple instances of this ACPI device it
* will bail out, because the platform device is registered with a
* fixed name. Of course it doesn't make sense to have more than one,
* and machine-specific scripts find the fixed name convenient. But
* It's also good for us to exclude multiple instances because both
* our hwmon and our wlan rfkill subdevice use global ACPI objects
* (the EC and the wlan PCI slot respectively).
*/
result = eeepc_platform_init(eeepc);
if (result)
goto fail_platform;
if (!acpi_video_backlight_support()) {
result = eeepc_backlight_init(eeepc);
if (result)
goto fail_backlight;
} else
pr_info("Backlight controlled by ACPI video driver\n");
result = eeepc_input_init(eeepc);
if (result)
goto fail_input;
result = eeepc_hwmon_init(eeepc);
if (result)
goto fail_hwmon;
result = eeepc_led_init(eeepc);
if (result)
goto fail_led;
result = eeepc_rfkill_init(eeepc);
if (result)
goto fail_rfkill;
eeepc_device_present = true;
return 0;
fail_rfkill:
eeepc_led_exit(eeepc);
fail_led:
eeepc_hwmon_exit(eeepc);
fail_hwmon:
eeepc_input_exit(eeepc);
fail_input:
eeepc_backlight_exit(eeepc);
fail_backlight:
eeepc_platform_exit(eeepc);
fail_platform:
kfree(eeepc);
return result;
}
static int eeepc_acpi_remove(struct acpi_device *device, int type)
{
struct eeepc_laptop *eeepc = acpi_driver_data(device);
eeepc_backlight_exit(eeepc);
eeepc_rfkill_exit(eeepc);
eeepc_input_exit(eeepc);
eeepc_hwmon_exit(eeepc);
eeepc_led_exit(eeepc);
eeepc_platform_exit(eeepc);
kfree(eeepc);
return 0;
}
static const struct acpi_device_id eeepc_device_ids[] = {
{EEEPC_ACPI_HID, 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
static struct acpi_driver eeepc_acpi_driver = {
.name = EEEPC_LAPTOP_NAME,
.class = EEEPC_ACPI_CLASS,
.owner = THIS_MODULE,
.ids = eeepc_device_ids,
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
.ops = {
.add = eeepc_acpi_add,
.remove = eeepc_acpi_remove,
.notify = eeepc_acpi_notify,
},
};
static int __init eeepc_laptop_init(void)
{
int result;
result = platform_driver_register(&platform_driver);
if (result < 0)
return result;
result = acpi_bus_register_driver(&eeepc_acpi_driver);
if (result < 0)
goto fail_acpi_driver;
if (!eeepc_device_present) {
result = -ENODEV;
goto fail_no_device;
}
return 0;
fail_no_device:
acpi_bus_unregister_driver(&eeepc_acpi_driver);
fail_acpi_driver:
platform_driver_unregister(&platform_driver);
return result;
}
static void __exit eeepc_laptop_exit(void)
{
acpi_bus_unregister_driver(&eeepc_acpi_driver);
platform_driver_unregister(&platform_driver);
}
module_init(eeepc_laptop_init);
module_exit(eeepc_laptop_exit);