This is a driver for newer Acer (and Wistron) laptops. It adds wireless
radio and bluetooth control, and on some laptops, exposes the mail LED and
LCD backlight.
v1:
* Initial release
v2:
* Replace left over ACPI references with WMI
* Add GUID based autoloading (depends on future work to WMI)
* Add DMI based autoloading (backup solution until WMI sysfs/ class
work is available)
* Checkpatch fixes
v3:
* Add new EC quirks for Aspire 3100 & 5100, and Extensa 5220
Signed-off-by: Carlos Corbacho <carlos@xxxxxxxxxxxxxxxxxxx>
CC: Len Brown <lenb@xxxxxxxxxx>
CC: Matthew Garrett <mjg59@xxxxxxxxxxxxx>
---
drivers/misc/Kconfig | 16 +
drivers/misc/Makefile | 1
drivers/misc/acer-wmi.c | 1009 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1026 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/acer-wmi.c
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index b1f9a40..d72acbf 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -92,6 +92,22 @@ config TIFM_7XX1
To compile this driver as a module, choose M here: the module will
be called tifm_7xx1.
+config ACER_WMI
+ tristate "Acer Laptop WMI-ACPI Extras (EXPERIMENTAL)"
+ depends on X86
+ depends on EXPERIMENTAL
+ depends on ACPI
+ depends on ACPI_WMI
+ depends on LEDS_CLASS
+ depends on BACKLIGHT_CLASS_DEVICE
+ ---help---
+ This is a driver for newer Acer (and Wistron) laptops. It adds
+ wireless radio and bluetooth control, and on some laptops,
+ exposes the mail LED and LCD backlight.
+
+ If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
+ here.
+
config ASUS_LAPTOP
tristate "Asus Laptop Extras (EXPERIMENTAL)"
depends on X86
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 87f2685..3da1491 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -6,6 +6,7 @@ obj- := misc.o # Dummy rule to force built-in.o to be made
obj-$(CONFIG_IBM_ASM) += ibmasm/
obj-$(CONFIG_HDPU_FEATURES) += hdpuftrs/
obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o
+obj-$(CONFIG_ACER_WMI) += acer-wmi.o
obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
obj-$(CONFIG_LKDTM) += lkdtm.o
diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
new file mode 100644
index 0000000..ebdf70c
--- /dev/null
+++ b/drivers/misc/acer-wmi.c
@@ -0,0 +1,1009 @@
+/*
+ * Acer Laptop WMI Extras
+ *
+ * Copyright (C) 2007 Carlos Corbacho <carlos@xxxxxxxxxxxxxxxxxxx>
+ *
+ * Based on acer_acpi:
+ * Copyright (C) 2005-2007 E.M. Smith
+ * Copyright (C) 2007 Carlos Corbacho <cathectic@xxxxxxxxx>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define ACER_WMI_VERSION "0.1"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/i8042.h>
+
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Carlos Corbacho");
+MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
+MODULE_LICENSE("GPL");
+
+#define ACER_LOGPREFIX "acer-wmi: "
+#define ACER_ERR KERN_ERR ACER_LOGPREFIX
+#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
+#define ACER_INFO KERN_INFO ACER_LOGPREFIX
+
+/*
+ * The following defines quirks to get some specific functions to work
+ * which are known to not be supported over ACPI (such as the mail LED
+ * on WMID based Acer's)
+ */
+struct acer_quirks {
+ const char *vendor;
+ const char *model;
+ u16 quirks;
+};
+
+/*
+ * Magic Number
+ * Meaning is unknown - this number is required for writing to ACPI for AMW0
+ * (it's also used in acerhk when directly accessing the EC)
+ */
+#define ACER_AMW0_WRITE 0x9610
+
+/*
+ * Bit masks for the old AMW0 interface
+ */
+#define ACER_AMW0_WIRELESS_MASK 0x35
+#define ACER_AMW0_BLUETOOTH_MASK 0x34
+#define ACER_AMW0_MAILLED_MASK 0x31
+
+/*
+ * Method IDs for new WMID interface
+ */
+#define ACER_WMID_GET_WIRELESS_METHODID 1
+#define ACER_WMID_GET_BLUETOOTH_METHODID 2
+#define ACER_WMID_GET_BRIGHTNESS_METHODID 3
+#define ACER_WMID_SET_WIRELESS_METHODID 4
+#define ACER_WMID_SET_BLUETOOTH_METHODID 5
+#define ACER_WMID_SET_BRIGHTNESS_METHODID 6
+#define ACER_WMID_GET_THREEG_METHODID 10
+#define ACER_WMID_SET_THREEG_METHODID 11
+
+/*
+ * Acer ACPI method GUIDs
+ */
+#define AMW0_GUID1 "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
+#define WMID_GUID1 "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
+
+MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
+MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
+
+/* Temporary workaround until the WMI sysfs interface goes in */
+MODULE_ALIAS("dmi:*:*Acer*:*:");
+
+/*
+ * Interface capability flags
+ */
+#define ACER_CAP_MAILLED (1<<0)
+#define ACER_CAP_WIRELESS (1<<1)
+#define ACER_CAP_BLUETOOTH (1<<2)
+#define ACER_CAP_BRIGHTNESS (1<<3)
+#define ACER_CAP_THREEG (1<<4)
+#define ACER_CAP_ANY (0xFFFFFFFF)
+
+/*
+ * Interface type flags
+ */
+enum interface_flags {
+ ACER_AMW0,
+ ACER_AMW0_V2,
+ ACER_WMID,
+};
+
+#define ACER_DEFAULT_WIRELESS 0
+#define ACER_DEFAULT_BLUETOOTH 0
+#define ACER_DEFAULT_MAILLED 0
+#define ACER_DEFAULT_THREEG 0
+
+static int max_brightness = 0xF;
+
+static int wireless = -1;
+static int bluetooth = -1;
+static int mailled = -1;
+static int brightness = -1;
+static int threeg = -1;
+static int force_series;
+
+module_param(mailled, int, 0444);
+module_param(wireless, int, 0444);
+module_param(bluetooth, int, 0444);
+module_param(brightness, int, 0444);
+module_param(threeg, int, 0444);
+module_param(force_series, int, 0444);
+MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
+MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
+MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
+MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
+MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
+MODULE_PARM_DESC(force_series, "Force a different laptop series");
+
+struct acer_data {
+ int mailled;
+ int wireless;
+ int bluetooth;
+ int threeg;
+ int brightness;
+};
+
+/* Each low-level interface must define at least some of the following */
+struct wmi_interface {
+ /*
+ * The WMI device type
+ */
+ u32 type;
+
+ /*
+ * The capabilities this interface provides
+ */
+ u32 capability;
+
+ /*
+ * Private data for the current interface
+ */
+ struct acer_data data;
+};
+
+/* The static interface pointer, points to the currently detected interface */
+static struct wmi_interface *interface;
+
+/*
+ * Embedded Controller quirks
+ * Some laptops require us to directly access the EC to either enable or query
+ * features that are not available through WMI.
+ */
+
+struct quirk_entry {
+ u8 wireless;
+ u8 mailled;
+ u8 brightness;
+ u8 bluetooth;
+ u8 max_brightness;
+};
+
+static struct quirk_entry *quirks;
+
+static void set_quirks(void)
+{
+ if (quirks->mailled != 0)
+ interface->capability |= ACER_CAP_MAILLED;
+
+ if (quirks->brightness != 0)
+ interface->capability |= ACER_CAP_BRIGHTNESS;
+
+ if (quirks->bluetooth != 0)
+ interface->capability |= ACER_CAP_BLUETOOTH;
+
+ if (quirks->wireless != 0)
+ interface->capability |= ACER_CAP_WIRELESS;
+
+ if (quirks->max_brightness != 0)
+ max_brightness = quirks->max_brightness;
+}
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+ quirks = dmi->driver_data;
+ return 0;
+}
+
+static struct quirk_entry quirk_unknown = {
+};
+
+static struct quirk_entry quirk_acer_travelmate_2490 = {
+ .mailled = 1,
+};
+
+static struct quirk_entry quirk_acer_travelmate_5720 = {
+ .max_brightness = 0x9,
+};
+
+static struct dmi_system_id acer_quirks[] = {
+ {
+ .callback = dmi_matched,
+ .ident = "Acer Aspire 3100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
+ },
+ .driver_data = &quirk_acer_travelmate_2490,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer Aspire 5100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
+ },
+ .driver_data = &quirk_acer_travelmate_2490,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer Aspire 5630",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
+ },
+ .driver_data = &quirk_acer_travelmate_2490,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer Aspire 5650",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
+ },
+ .driver_data = &quirk_acer_travelmate_2490,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer Aspire 5680",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
+ },
+ .driver_data = &quirk_acer_travelmate_2490,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer Extensa 5220",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5220"),
+ },
+ .driver_data = &quirk_acer_travelmate_5720,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer TravelMate 2490",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
+ },
+ .driver_data = &quirk_acer_travelmate_2490,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Acer TravelMate 5720",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5720"),
+ },
+ .driver_data = &quirk_acer_travelmate_5720,
+ },
+ {}
+};
+
+/* Find which quirks are needed for a particular vendor/ model pair */
+static void find_quirks(void)
+{
+ if (!force_series) {
+ dmi_check_system(acer_quirks);
+ } else if (force_series == 2490) {
+ quirks = &quirk_acer_travelmate_2490;
+ }
+
+ if (quirks == NULL)
+ quirks = &quirk_unknown;
+
+ set_quirks();
+}
+
+/*
+ * General interface convenience methods
+ */
+
+static bool has_cap(u32 cap)
+{
+ if ((interface->capability & cap) != 0)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Old interface (now known as the AMW0 interface)
+ */
+struct wmab_args {
+ u32 eax;
+ u32 ebx;
+ u32 ecx;
+ u32 edx;
+};
+
+static acpi_status WMAB_execute(struct wmab_args *regbuf,
+struct acpi_buffer *result)
+{
+ struct acpi_buffer input;
+ acpi_status status;
+ input.length = sizeof(struct wmab_args);
+ input.pointer = (u8 *)regbuf;
+
+ status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
+
+ return status;
+}
+
+static acpi_status AMW0_get_bool(bool *value, u32 cap,
+struct wmi_interface *iface)
+{
+ u8 result;
+
+ switch (cap) {
+ case ACER_CAP_MAILLED:
+ switch (quirks->mailled) {
+ default:
+ ec_read(0x0A, &result);
+ *value = (result >> 7) & 0x01;
+ return 0;
+ }
+ break;
+ case ACER_CAP_WIRELESS:
+ switch (quirks->wireless) {
+ default:
+ ec_read(0x0A, &result);
+ *value = (result >> 2) & 0x01;
+ return 0;
+ }
+ break;
+ case ACER_CAP_BLUETOOTH:
+ switch (quirks->bluetooth) {
+ default:
+ ec_read(0x0A, &result);
+ *value = (result >> 4) & 0x01;
+ return 0;
+ }
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ return AE_OK;
+}
+
+static acpi_status AMW0_set_bool(bool value, u32 cap,
+struct wmi_interface *iface)
+{
+ struct wmab_args args;
+
+ args.eax = ACER_AMW0_WRITE;
+ args.ebx = value ? (1<<8) : 0;
+ args.ecx = args.edx = 0;
+
+ switch (cap) {
+ case ACER_CAP_MAILLED:
+ args.ebx |= ACER_AMW0_MAILLED_MASK;
+ break;
+ case ACER_CAP_WIRELESS:
+ args.ebx |= ACER_AMW0_WIRELESS_MASK;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+
+ /* Actually do the set */
+ return WMAB_execute(&args, NULL);
+}
+
+static acpi_status AMW0_get_u8(u8 *value, u32 cap, struct wmi_interface *iface)
+{
+ switch (cap) {
+ case ACER_CAP_BRIGHTNESS:
+ switch (quirks->brightness) {
+ default:
+ return ec_read(0x83, value);
+ }
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ return AE_OK;
+}
+
+static acpi_status AMW0_set_u8(u8 value, u32 cap, struct wmi_interface *iface)
+{
+ switch (cap) {
+ case ACER_CAP_BRIGHTNESS:
+ switch (quirks->brightness) {
+ default:
+ return ec_write(0x83, value);
+ break;
+ }
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ return AE_OK;
+}
+
+static struct wmi_interface AMW0_interface = {
+ .type = ACER_AMW0,
+ .capability = (
+ ACER_CAP_MAILLED |
+ ACER_CAP_WIRELESS |
+ ACER_CAP_BLUETOOTH
+ ),
+};
+
+static struct wmi_interface AMW0_V2_interface = {
+ .type = ACER_AMW0_V2,
+ .capability = (
+ ACER_CAP_MAILLED |
+ ACER_CAP_WIRELESS |
+ ACER_CAP_BLUETOOTH |
+ ACER_CAP_BRIGHTNESS
+ ),
+};
+
+/*
+ * New interface (The WMID interface)
+ */
+static acpi_status
+WMI_execute_u32(u32 method_id, u32 in, u32 *out)
+{
+ struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
+ struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ u32 tmp;
+ acpi_status status;
+
+ status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
+
+ if (ACPI_FAILURE(status))
+ return status;
+
+ obj = (union acpi_object *) result.pointer;
+ if (obj && obj->type == ACPI_TYPE_BUFFER &&
+ obj->buffer.length == sizeof(u32)) {
+ tmp = *((u32 *) obj->buffer.pointer);
+ } else {
+ tmp = 0;
+ }
+
+ if (out)
+ *out = tmp;
+
+ if (result.length > 0 && result.pointer)
+ kfree(result.pointer);
+
+ return status;
+}
+
+static acpi_status WMID_get_u8(u8 *value, u32 cap, struct wmi_interface *iface)
+{
+ acpi_status status;
+ u32 result;
+ u32 method_id = 0;
+
+ switch (cap) {
+ case ACER_CAP_WIRELESS:
+ method_id = ACER_WMID_GET_WIRELESS_METHODID;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
+ break;
+ case ACER_CAP_BRIGHTNESS:
+ method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
+ break;
+ case ACER_CAP_THREEG:
+ method_id = ACER_WMID_GET_THREEG_METHODID;
+ break;
+ case ACER_CAP_MAILLED:
+ switch (quirks->mailled) {
+ case 1:
+ ec_read(0x9f, value);
+ *value &= 0x01;
+ return 0;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ status = WMI_execute_u32(method_id, 0, &result);
+
+ if (ACPI_SUCCESS(status))
+ *value = (u8) result;
+
+ return status;
+}
+
+static acpi_status WMID_set_u8(u8 value, u32 cap, struct wmi_interface *iface)
+{
+ u32 method_id = 0;
+ char param;
+
+ switch (cap) {
+ case ACER_CAP_BRIGHTNESS:
+ method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
+ break;
+ case ACER_CAP_WIRELESS:
+ method_id = ACER_WMID_SET_WIRELESS_METHODID;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
+ break;
+ case ACER_CAP_THREEG:
+ method_id = ACER_WMID_SET_THREEG_METHODID;
+ break;
+ case ACER_CAP_MAILLED:
+ switch (quirks->mailled) {
+ case 1:
+ param = value? 0x92 : 0x93;
+ i8042_command(¶m, 0x1059);
+ return 0;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ return WMI_execute_u32(method_id, (u32)value, NULL);
+}
+
+
+static struct wmi_interface wmid_interface = {
+ .type = ACER_WMID,
+ .capability = (
+ ACER_CAP_WIRELESS
+ | ACER_CAP_BRIGHTNESS
+ | ACER_CAP_BLUETOOTH
+ | ACER_CAP_THREEG
+ ),
+};
+
+/*
+ * Generic Device (interface-independent)
+ */
+
+static acpi_status get_bool(bool *value, u32 cap)
+{
+ acpi_status status = AE_BAD_ADDRESS;
+ u8 tmp = 0;
+
+ switch (interface->type) {
+ case ACER_AMW0:
+ status = AMW0_get_bool(value, cap, interface);
+ break;
+ case ACER_AMW0_V2:
+ if (cap == ACER_CAP_MAILLED) {
+ status = AMW0_get_bool(value, cap, interface);
+ break;
+ }
+ case ACER_WMID:
+ status = WMID_get_u8(&tmp, cap, interface);
+ *value = (tmp == 1) ? 1 : 0;
+ break;
+ }
+ return status;
+}
+
+static acpi_status set_bool(int value, u32 cap)
+{
+ acpi_status status = AE_BAD_PARAMETER;
+
+ if ((value == 0 || value == 1) && (interface->capability & cap)) {
+ switch (interface->type) {
+ case ACER_AMW0:
+ status = AMW0_set_bool(value == 1, cap, interface);
+ break;
+ case ACER_AMW0_V2:
+ if (cap == ACER_CAP_MAILLED) {
+ status = AMW0_set_bool(value == 1, cap,
+ interface);
+ break;
+ }
+ case ACER_WMID:
+ status = WMID_set_u8(value == 1, cap, interface);
+ break;
+ }
+ }
+ return status;
+}
+
+static acpi_status get_u8(u8 *value, u32 cap)
+{
+ switch (interface->type) {
+ case ACER_AMW0:
+ return AMW0_get_u8(value, cap, interface);
+ break;
+ case ACER_AMW0_V2:
+ case ACER_WMID:
+ return WMID_get_u8(value, cap, interface);
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+}
+
+static acpi_status set_u8(u8 value, u8 min, u8 max, u32 cap)
+{
+ if ((value >= min && value <= max) && (interface->capability & cap)) {
+ switch (interface->type) {
+ case ACER_AMW0:
+ return AMW0_set_u8(value, cap, interface);
+ case ACER_AMW0_V2:
+ case ACER_WMID:
+ return WMID_set_u8(value, cap, interface);
+ default:
+ return AE_BAD_PARAMETER;
+ }
+ }
+ return AE_BAD_PARAMETER;
+}
+
+/* Each _u8 needs a small wrapper that sets the boundary values */
+static acpi_status set_brightness(u8 value)
+{
+ return set_u8(value, 0, max_brightness, ACER_CAP_BRIGHTNESS);
+}
+
+static void __init acer_commandline_init(void)
+{
+ /*
+ * These will all fail silently if the value given is invalid, or the
+ * capability isn't available on the given interface
+ */
+ set_bool(mailled, ACER_CAP_MAILLED);
+ set_bool(wireless, ACER_CAP_WIRELESS);
+ set_bool(bluetooth, ACER_CAP_BLUETOOTH);
+ set_bool(threeg, ACER_CAP_THREEG);
+ set_brightness((u8)brightness);
+}
+
+/*
+ * LED device (Mail LED only, no other LEDs known yet)
+ */
+static void mail_led_set(struct led_classdev *led_cdev,
+enum led_brightness value)
+{
+ bool tmp = value;
+ set_bool(tmp, ACER_CAP_MAILLED);
+}
+
+static struct led_classdev mail_led = {
+ .name = "acer-mail:green",
+ .brightness_set = mail_led_set,
+};
+
+static void acer_led_init(struct device *dev)
+{
+ led_classdev_register(dev, &mail_led);
+}
+
+static void acer_led_exit(void)
+{
+ led_classdev_unregister(&mail_led);
+}
+
+/*
+ * Backlight device
+ */
+static struct backlight_device *acer_backlight_device;
+
+static int read_brightness(struct backlight_device *bd)
+{
+ u8 value;
+ get_u8(&value, ACER_CAP_BRIGHTNESS);
+ return value;
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+ set_brightness(bd->props.brightness);
+ return 0;
+}
+
+static struct backlight_ops acer_bl_ops = {
+ .get_brightness = read_brightness,
+ .update_status = update_bl_status,
+};
+
+static int __init acer_backlight_init(struct device *dev)
+{
+ struct backlight_device *bd;
+
+ bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
+ if (IS_ERR(bd)) {
+ printk(ACER_ERR "Could not register Acer backlight device\n");
+ acer_backlight_device = NULL;
+ return PTR_ERR(bd);
+ }
+
+ acer_backlight_device = bd;
+
+ bd->props.max_brightness = max_brightness;
+ bd->props.brightness = read_brightness(NULL);
+ backlight_update_status(bd);
+ return 0;
+}
+
+static void __exit acer_backlight_exit(void)
+{
+ backlight_device_unregister(acer_backlight_device);
+}
+
+/*
+ * Read/ write bool sysfs macro
+ */
+#define show_set_bool(value, cap) \
+static ssize_t \
+show_bool_##value(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ bool result; \
+ acpi_status status = get_bool(&result, cap); \
+ if (ACPI_SUCCESS(status)) \
+ return sprintf(buf, "%d\n", result); \
+ return sprintf(buf, "Read error\n"); \
+} \
+\
+static ssize_t \
+set_bool_##value(struct device *dev, struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ bool tmp = simple_strtoul(buf, NULL, 10); \
+ acpi_status status = set_bool(tmp, cap); \
+ if (ACPI_FAILURE(status)) \
+ return -EINVAL; \
+ return count; \
+} \
+static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
+ show_bool_##value, set_bool_##value);
+
+show_set_bool(wireless, ACER_CAP_WIRELESS);
+show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
+show_set_bool(threeg, ACER_CAP_THREEG);
+
+/*
+ * Read interface sysfs macro
+ */
+static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ switch (interface->type) {
+ case ACER_AMW0:
+ return sprintf(buf, "AMW0\n");
+ case ACER_AMW0_V2:
+ return sprintf(buf, "AMW0 v2\n");
+ case ACER_WMID:
+ return sprintf(buf, "WMID\n");
+ default:
+ return sprintf(buf, "Error!\n");
+ }
+}
+
+static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
+ show_interface, NULL);
+
+/*
+ * Platform device
+ */
+static int __devinit acer_platform_probe(struct platform_device *device)
+{
+ if (has_cap(ACER_CAP_MAILLED))
+ acer_led_init(&device->dev);
+ if (has_cap(ACER_CAP_BRIGHTNESS))
+ acer_backlight_init(&device->dev);
+ return 0;
+}
+
+static int acer_platform_remove(struct platform_device *device)
+{
+ if (has_cap(ACER_CAP_MAILLED))
+ acer_led_exit();
+ if (has_cap(ACER_CAP_BRIGHTNESS))
+ acer_backlight_exit();
+ return 0;
+}
+
+static int acer_platform_suspend(struct platform_device *dev,
+pm_message_t state)
+{
+ bool value;
+ u8 u8value;
+ struct acer_data *data = &interface->data;
+
+ if (!data)
+ return -ENOMEM;
+
+ if (has_cap(ACER_CAP_WIRELESS)) {
+ get_bool(&value, ACER_CAP_WIRELESS);
+ data->wireless = value;
+ }
+
+ if (has_cap(ACER_CAP_BLUETOOTH)) {
+ get_bool(&value, ACER_CAP_BLUETOOTH);
+ data->bluetooth = value;
+ }
+
+ if (has_cap(ACER_CAP_MAILLED)) {
+ get_bool(&value, ACER_CAP_MAILLED);
+ data->mailled = value;
+ }
+
+ if (has_cap(ACER_CAP_BRIGHTNESS)) {
+ get_u8(&u8value, ACER_CAP_BRIGHTNESS);
+ data->brightness = value;
+ }
+
+ return 0;
+}
+
+static int acer_platform_resume(struct platform_device *device)
+{
+ struct acer_data *data = &interface->data;
+
+ if (!data)
+ return -ENOMEM;
+
+ if (has_cap(ACER_CAP_WIRELESS))
+ set_bool(data->wireless, ACER_CAP_WIRELESS);
+
+ if (has_cap(ACER_CAP_BLUETOOTH))
+ set_bool(data->bluetooth, ACER_CAP_BLUETOOTH);
+
+ if (has_cap(ACER_CAP_THREEG))
+ set_bool(data->threeg, ACER_CAP_THREEG);
+
+ if (has_cap(ACER_CAP_MAILLED))
+ set_bool(data->mailled, ACER_CAP_MAILLED);
+
+ if (has_cap(ACER_CAP_BRIGHTNESS))
+ set_brightness((u8)data->brightness);
+
+ return 0;
+}
+
+static struct platform_driver acer_platform_driver = {
+ .driver = {
+ .name = "acer-wmi",
+ .owner = THIS_MODULE,
+ },
+ .probe = acer_platform_probe,
+ .remove = acer_platform_remove,
+ .suspend = acer_platform_suspend,
+ .resume = acer_platform_resume,
+};
+
+static struct platform_device *acer_platform_device;
+
+static int remove_sysfs(struct platform_device *device)
+{
+ if (has_cap(ACER_CAP_WIRELESS))
+ device_remove_file(&device->dev, &dev_attr_wireless);
+
+ if (has_cap(ACER_CAP_BLUETOOTH))
+ device_remove_file(&device->dev, &dev_attr_bluetooth);
+
+ if (has_cap(ACER_CAP_THREEG))
+ device_remove_file(&device->dev, &dev_attr_threeg);
+
+ device_remove_file(&device->dev, &dev_attr_interface);
+
+ return 0;
+}
+
+static int create_sysfs(void)
+{
+ int retval = -ENOMEM;
+
+ if (has_cap(ACER_CAP_WIRELESS)) {
+ retval = device_create_file(&acer_platform_device->dev,
+ &dev_attr_wireless);
+ if (retval)
+ goto error;
+ }
+
+ if (has_cap(ACER_CAP_BLUETOOTH)) {
+ retval = device_create_file(&acer_platform_device->dev,
+ &dev_attr_bluetooth);
+ if (retval)
+ goto error;
+ }
+
+ if (has_cap(ACER_CAP_THREEG)) {
+ retval = device_create_file(&acer_platform_device->dev,
+ &dev_attr_threeg);
+ if (retval)
+ goto error;
+ }
+
+ retval = device_create_file(&acer_platform_device->dev,
+ &dev_attr_interface);
+ if (retval)
+ goto error;
+
+ return 0;
+
+error:
+ remove_sysfs(acer_platform_device);
+ return retval;
+}
+
+static int __init acer_wmi_init(void)
+{
+ printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
+ ACER_WMI_VERSION);
+
+ find_quirks();
+
+ /*
+ * Detect which ACPI-WMI interface we're using.
+ */
+ if (wmi_has_guid(AMW0_GUID1)) {
+ interface = &AMW0_interface;
+
+ if (!quirks)
+ return -ENOMEM;
+
+ if (wmi_has_guid(WMID_GUID1)) {
+ interface = &AMW0_V2_interface;
+ } else {
+ if (!quirks->brightness) {
+ quirks->brightness = 1;
+ interface->capability |= ACER_CAP_BRIGHTNESS;
+ }
+ }
+ } else if (wmi_has_guid(WMID_GUID1)) {
+ interface = &wmid_interface;
+ } else {
+ printk(ACER_ERR "No or unsupported WMI interface, unable to ");
+ printk(KERN_CONT "load.\n");
+ return -ENODEV;
+ }
+
+ if (platform_driver_register(&acer_platform_driver)) {
+ printk(ACER_ERR "Unable to register platform driver.\n");
+ goto error_platform_register;
+ }
+ acer_platform_device = platform_device_alloc("acer-wmi", -1);
+ platform_device_add(acer_platform_device);
+
+ create_sysfs();
+
+ /* Override any initial settings with values from the commandline */
+ acer_commandline_init();
+
+ return 0;
+
+error_platform_register:
+ return -ENODEV;
+}
+
+static void __exit acer_wmi_exit(void)
+{
+ remove_sysfs(acer_platform_device);
+ platform_device_del(acer_platform_device);
+ platform_driver_unregister(&acer_platform_driver);
+
+ printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
+ return;
+}
+
+module_init(acer_wmi_init);
+module_exit(acer_wmi_exit);
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