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OpenCloudOS-Kernel/drivers/platform/x86/eeepc-laptop.c

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/*
* 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 <linux/slab.h>
#include <linux/acpi.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>
#include <acpi/video.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, 0444);
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 acpi_device *device; /* the device we are in */
struct backlight_device *backlight_device;
struct input_dev *inputdev;
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)
{
acpi_status status;
status = acpi_execute_simple_method(handle, (char *)method, val);
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_warn("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_warn("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_warn("Error finding %s\n", method);
return -ENODEV;
}
return 0;
}
/*
* Sys helpers
*/
static int parse_arg(const char *buf, int *val)
{
if (sscanf(buf, "%i", val) != 1)
return -EINVAL;
return 0;
}
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, &value);
if (rv < 0)
return rv;
rv = set_acpi(eeepc, cm, value);
if (rv < 0)
return -EIO;
return count;
}
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_ACPI_SHOW_FUNC(_name, _cm) \
static ssize_t _name##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_sys_acpi(dev, _cm, buf); \
}
#define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
static ssize_t _name##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return store_sys_acpi(dev, _cm, buf, count); \
}
#define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
EEEPC_ACPI_STORE_FUNC(_name, _cm) \
static DEVICE_ATTR_RW(_name)
#define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
EEEPC_ACPI_STORE_FUNC(_name, _cm) \
static DEVICE_ATTR_WO(_name)
EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
EEEPC_CREATE_DEVICE_ATTR_WO(disp, 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);
if (c->cur < 0)
return -ENODEV;
c->num = (c->cur >> 8) & 0xff;
c->cur &= 0xff;
if (c->num == 0 || c->num > 12)
return -ENODEV;
return 0;
}
static ssize_t available_cpufv_show(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 cpufv_show(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 cpufv_store(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, &value);
if (rv < 0)
return rv;
if (value < 0 || value >= c.num)
return -EINVAL;
rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
if (rv)
return rv;
return count;
}
static ssize_t cpufv_disabled_show(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 cpufv_disabled_store(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, &value);
if (rv < 0)
return rv;
switch (value) {
case 0:
if (eeepc->cpufv_disabled)
pr_warn("cpufv enabled (not officially supported on this model)\n");
eeepc->cpufv_disabled = false;
return count;
case 1:
return -EPERM;
default:
return -EINVAL;
}
}
static DEVICE_ATTR_RW(cpufv);
static DEVICE_ATTR_RO(available_cpufv);
static DEVICE_ATTR_RW(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 enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
{
struct eeepc_laptop *eeepc;
eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
return get_acpi(eeepc, CM_ASL_TPD);
}
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;
if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
eeepc->tpd_led.brightness_get = tpd_led_get;
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 (!IS_ERR_OR_NULL(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, acpi_handle handle)
{
struct pci_dev *port;
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);
pci_lock_rescan_remove();
if (!eeepc->hotplug_slot)
goto out_unlock;
port = acpi_get_pci_dev(handle);
if (!port) {
pr_warning("Unable to find port\n");
goto out_unlock;
}
bus = port->subordinate;
if (!bus) {
pr_warn("Unable to find PCI bus 1?\n");
goto out_put_dev;
}
if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
pr_err("Unable to read PCI config space?\n");
goto out_put_dev;
}
absent = (l == 0xffffffff);
if (blocked != absent) {
pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
blocked ? "blocked" : "unblocked",
absent ? "absent" : "present");
pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
goto out_put_dev;
}
if (!blocked) {
dev = pci_get_slot(bus, 0);
if (dev) {
/* Device already present */
pci_dev_put(dev);
goto out_put_dev;
}
dev = pci_scan_single_device(bus, 0);
if (dev) {
pci_bus_assign_resources(bus);
pci_bus_add_device(dev);
}
} else {
dev = pci_get_slot(bus, 0);
if (dev) {
pci_stop_and_remove_bus_device(dev);
pci_dev_put(dev);
}
}
out_put_dev:
pci_dev_put(port);
out_unlock:
pci_unlock_rescan_remove();
mutex_unlock(&eeepc->hotplug_lock);
}
static void eeepc_rfkill_hotplug_update(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))
eeepc_rfkill_hotplug(eeepc, handle);
}
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, handle);
}
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_FAILURE(status))
return -ENODEV;
status = acpi_install_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
eeepc_rfkill_notify,
eeepc);
if (ACPI_FAILURE(status))
pr_warn("Failed to register notify on %s\n", node);
/*
* Refresh pci hotplug in case the rfkill state was
* changed during setup.
*/
eeepc_rfkill_hotplug(eeepc, handle);
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_FAILURE(status))
return;
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);
/*
* Refresh pci hotplug in case the rfkill
* state was changed after
* eeepc_unregister_rfkill_notifier()
*/
eeepc_rfkill_hotplug(eeepc, handle);
}
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 char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
{
eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
if (eeepc->wlan_rfkill) {
rfkill_unregister(eeepc->wlan_rfkill);
rfkill_destroy(eeepc->wlan_rfkill);
eeepc->wlan_rfkill = NULL;
}
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, EEEPC_RFKILL_NODE_1);
eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
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) {
int 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);
if (wlan >= 0)
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_update(eeepc, EEEPC_RFKILL_NODE_1);
eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
}
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,
.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 inline int eeepc_pwm_to_lmsensors(int value)
{
return value * 255 / 100;
}
static inline int eeepc_lmsensors_to_pwm(int value)
{
value = clamp_val(value, 0, 255);
return value * 100 / 255;
}
static int eeepc_get_fan_pwm(void)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_PWM, &value);
return eeepc_pwm_to_lmsensors(value);
}
static void eeepc_set_fan_pwm(int value)
{
value = eeepc_lmsensors_to_pwm(value);
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;
}
#define EEEPC_EC_FAN_CTRL_BIT 0x02
#define EEEPC_FAN_CTRL_MANUAL 1
#define EEEPC_FAN_CTRL_AUTO 2
static int eeepc_get_fan_ctrl(void)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_CTRL, &value);
if (value & EEEPC_EC_FAN_CTRL_BIT)
return EEEPC_FAN_CTRL_MANUAL;
else
return EEEPC_FAN_CTRL_AUTO;
}
static void eeepc_set_fan_ctrl(int manual)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_CTRL, &value);
if (manual == EEEPC_FAN_CTRL_MANUAL)
value |= EEEPC_EC_FAN_CTRL_BIT;
else
value &= ~EEEPC_EC_FAN_CTRL_BIT;
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, &value);
if (rv < 0)
return rv;
set(value);
return count;
}
static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
{
return sprintf(buf, "%d\n", get());
}
#define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
static ssize_t _name##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_sys_hwmon(_get, buf); \
}
#define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
static ssize_t _name##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return store_sys_hwmon(_set, buf, count); \
}
#define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
EEEPC_SENSOR_STORE_FUNC(_name, _set) \
static DEVICE_ATTR_RW(_name)
#define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
static DEVICE_ATTR_RO(_name)
EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
eeepc_set_fan_pwm);
EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
eeepc_set_fan_ctrl);
static struct attribute *hwmon_attrs[] = {
&dev_attr_pwm1.attr,
&dev_attr_fan1_input.attr,
&dev_attr_pwm1_enable.attr,
NULL
};
ATTRIBUTE_GROUPS(hwmon);
static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
{
struct device *dev = &eeepc->platform_device->dev;
struct device *hwmon;
hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
hwmon_groups);
if (IS_ERR(hwmon)) {
pr_err("Could not register eeepc hwmon device\n");
return PTR_ERR(hwmon);
}
return 0;
}
/*
* 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 const 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_properties props;
struct backlight_device *bd;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = 15;
bd = backlight_device_register(EEEPC_LAPTOP_FILE,
&eeepc->platform_device->dev, eeepc,
&eeepcbl_ops, &props);
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.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)
{
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)
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) {
sparse_keymap_free(eeepc->inputdev);
input_unregister_device(eeepc->inputdev);
}
eeepc->inputdev = NULL;
}
/*
* ACPI driver
*/
static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
{
if (!eeepc->inputdev)
return;
if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
pr_info("Unknown key %x pressed\n", event);
}
static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
{
struct eeepc_laptop *eeepc = acpi_driver_data(device);
int old_brightness, new_brightness;
u16 count;
if (event > ACPI_MAX_SYS_NOTIFY)
return;
count = eeepc->event_count[event % 128]++;
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) {
eeepc_input_notify(eeepc, event);
return;
}
/* Ignore them completely if the acpi video driver is used */
if (!eeepc->backlight_device)
return;
/* 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)
*/
}
eeepc_input_notify(eeepc, event);
}
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 available.
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)
{
unsigned int init_flags;
int result;
result = acpi_bus_get_status(eeepc->device);
if (result)
return result;
if (!eeepc->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 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 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->device = device;
eeepc->hotplug_disabled = hotplug_disabled;
eeepc_dmi_check(eeepc);
result = eeepc_acpi_init(eeepc);
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_get_backlight_type() == acpi_backlight_vendor) {
result = eeepc_backlight_init(eeepc);
if (result)
goto fail_backlight;
}
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:
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)
{
struct eeepc_laptop *eeepc = acpi_driver_data(device);
eeepc_backlight_exit(eeepc);
eeepc_rfkill_exit(eeepc);
eeepc_input_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);
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