Signed-off-by: Eric Cooper <[EMAIL PROTECTED]>
---
drivers/misc/Kconfig | 10 +
drivers/misc/Makefile | 1 +
drivers/misc/eeepc.c | 447 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 458 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/eeepc.c
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index b1f9a40..8fd1ccb 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -251,4 +251,14 @@ config ATMEL_SSC
If unsure, say N.
+config EEEPC
+ tristate "Eee PC Hotkey Driver (EXPERIMENTAL)"
+ depends on X86
+ depends on ACPI
+ depends on EXPERIMENTAL && !ACPI_ASUS
+ ---help---
+ This driver supports the Fn-Fx keys on Eee PC laptops.
+
+ If you have an Eee PC laptop, say Y or M here.
+
endif # MISC_DEVICES
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 87f2685..699b35c 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o
obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o
obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o
+obj-$(CONFIG_EEEPC) += eeepc.o
diff --git a/drivers/misc/eeepc.c b/drivers/misc/eeepc.c
new file mode 100644
index 0000000..2e33117
--- /dev/null
+++ b/drivers/misc/eeepc.c
@@ -0,0 +1,447 @@
+/*
+ * eepc_acpi.c - Asus Eee PC hotkey driver
+ *
+ * Copyright (C) 2008 Eric Cooper <[EMAIL PROTECTED]>
+ *
+ * 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
+ *
+ * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+#include <asm/uaccess.h>
+
+#define EEEPC_HOTK_NAME "Eee PC Hotkey Driver"
+#define EEEPC_HOTK_FILE "eeepc"
+#define EEEPC_HOTK_CLASS "hotkey"
+#define EEEPC_HOTK_DEVICE_NAME "Hotkey"
+#define EEEPC_HOTK_HID "ASUS010"
+
+#define EEEPC_LOG EEEPC_HOTK_FILE ": "
+#define EEEPC_ERR KERN_ERR EEEPC_LOG
+#define EEEPC_WARNING KERN_WARNING EEEPC_LOG
+#define EEEPC_NOTICE KERN_NOTICE EEEPC_LOG
+#define EEEPC_INFO KERN_INFO EEEPC_LOG
+
+/*
+ * Definitions for Asus EeePC
+ */
+
+#define NOTIFY_WLAN_ON 0x10
+
+enum {
+ DISABLE_ASL_WLAN = 0x0001,
+ DISABLE_ASL_BLUETOOTH = 0x0002,
+ DISABLE_ASL_IRDA = 0x0004,
+ DISABLE_ASL_CAMERA = 0x0008,
+ DISABLE_ASL_TV = 0x0010,
+ DISABLE_ASL_GPS = 0x0020,
+ DISABLE_ASL_DISPLAYSWITCH = 0x0040,
+ DISABLE_ASL_MODEM = 0x0080,
+ DISABLE_ASL_CARDREADER = 0x0100
+};
+
+enum {
+ CM_ASL_WLAN = 0,
+ CM_ASL_BLUETOOTH,
+ CM_ASL_IRDA,
+ CM_ASL_1394,
+ CM_ASL_CAMERA,
+ CM_ASL_TV,
+ CM_ASL_GPS,
+ CM_ASL_DVDROM,
+ CM_ASL_DISPLAYSWITCH,
+ CM_ASL_PANELBRIGHT,
+ CM_ASL_BIOSFLASH,
+ CM_ASL_ACPIFLASH,
+ CM_ASL_CPUFV,
+ CM_ASL_CPUTEMPERATURE,
+ CM_ASL_FANCPU,
+ CM_ASL_FANCHASSIS,
+ CM_ASL_USBPORT1,
+ CM_ASL_USBPORT2,
+ CM_ASL_USBPORT3,
+ CM_ASL_MODEM,
+ CM_ASL_CARDREADER,
+ CM_ASL_LID
+};
+
+const char *cm_getv[] = {
+ "WLDG", NULL, NULL, NULL,
+ "CAMG", NULL, NULL, NULL,
+ NULL, "PBLG", NULL, NULL,
+ "CFVG", NULL, NULL, NULL,
+ "USBG", NULL, NULL, "MODG",
+ "CRDG", "LIDG"
+};
+
+const char *cm_setv[] = {
+ "WLDS", NULL, NULL, NULL,
+ "CAMS", NULL, NULL, NULL,
+ "SDSP", "PBLS", "HDPS", NULL,
+ "CFVS", NULL, NULL, NULL,
+ "USBG", NULL, NULL, "MODS",
+ "CRDS", NULL
+};
+
+static unsigned int init_flag;
+
+/*
+ * This is the main structure, we can use it to store useful information
+ * about the hotk device
+ */
+struct eeepc_hotk {
+ struct acpi_device *device; /* the device we are in */
+ acpi_handle handle; /* the handle of the hotk device */
+ u32 cm_supported; /* the control methods supported
+ by this BIOS */
+ u16 event_count[128]; /* count for each event */
+};
+
+/* The actual device the driver binds to */
+static struct eeepc_hotk *ehotk;
+
+/*
+ * The hotkey driver declaration
+ */
+static int eeepc_hotk_add(struct acpi_device *device);
+static int eeepc_hotk_remove(struct acpi_device *device, int type);
+
+static const struct acpi_device_id eee_device_ids[] = {
+ {EEEPC_HOTK_HID, 0},
+ {"", 0},
+};
+
+static struct acpi_driver eeepc_hotk_driver = {
+ .name = EEEPC_HOTK_NAME,
+ .class = EEEPC_HOTK_CLASS,
+ .ids = eee_device_ids,
+ .ops = {
+ .add = eeepc_hotk_add,
+ .remove = eeepc_hotk_remove,
+ },
+};
+
+MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Eric Cooper");
+MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
+MODULE_LICENSE("GPL");
+
+/*
+ * returns 1 if write is successful, otherwise 0.
+ */
+static int write_acpi_int(acpi_handle handle, const char *method, int val,
+ struct acpi_buffer *output)
+{
+ struct acpi_object_list params;
+ union acpi_object in_obj;
+ acpi_status status;
+
+ params.count = 1;
+ params.pointer = &in_obj;
+ in_obj.type = ACPI_TYPE_INTEGER;
+ in_obj.integer.value = val;
+
+ status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
+ return (status == AE_OK);
+}
+
+static int read_acpi_int(acpi_handle handle, const char *method, int *val)
+{
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+ acpi_status status;
+
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+ status = acpi_evaluate_object(handle, (char *) method, NULL, &output);
+ *val = out_obj.integer.value;
+ return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
+}
+
+static int parse_arg(const char *buf, unsigned long count, int *val)
+{
+ if (!count)
+ return 0;
+ if (count > 31)
+ return -EINVAL;
+ if (sscanf(buf, "%i", val) != 1)
+ return -EINVAL;
+ return count;
+}
+
+static ssize_t store_proc(int cm, const char *buf, size_t count)
+{
+ int rv, value;
+
+ rv = parse_arg(buf, count, &value);
+ if (rv > 0 && (ehotk->cm_supported & (0x1 << cm))) {
+ const char *method = cm_setv[cm];
+ if (method == NULL)
+ return 0;
+ if (!write_acpi_int(ehotk->handle, method, value, NULL))
+ printk(EEEPC_WARNING "Error writing %s\n", method);
+ }
+ return rv;
+}
+
+static ssize_t show_proc(int cm, char *buf)
+{
+ int value = -1;
+
+ if ((ehotk->cm_supported & (0x1 << cm))) {
+ const char *method = cm_getv[cm];
+ if (method == NULL)
+ return 0;
+ if (!read_acpi_int(ehotk->handle, method, &value))
+ printk(EEEPC_WARNING "Error reading %s\n", method);
+ }
+ return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t real_store_init(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rv, value;
+
+ rv = parse_arg(buf, count, &value);
+ if (!write_acpi_int(ehotk->handle, "INIT", value, NULL))
+ printk(EEEPC_ERR "Hotkey initialization failed\n");
+ else
+ printk(EEEPC_INFO "Reset init flag 0x%x\n", value);
+ return rv;
+}
+
+#define EEEPC_CREATE_DEVICE_ATTR(_name, _cm) \
+ static ssize_t show_##_name(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+ { \
+ return show_proc(_cm, buf); \
+ } \
+ static ssize_t store_##_name(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+ { \
+ return store_proc(_cm, buf, count); \
+ } \
+ static struct device_attribute dev_attr_##_name = { \
+ .attr = { \
+ .name = __stringify(_name), \
+ .mode = 0644 }, \
+ .show = show_##_name, \
+ .store = store_##_name, \
+ }
+
+EEEPC_CREATE_DEVICE_ATTR(brn, CM_ASL_PANELBRIGHT);
+EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
+EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
+EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
+EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
+EEEPC_CREATE_DEVICE_ATTR(hdps, CM_ASL_BIOSFLASH);
+EEEPC_CREATE_DEVICE_ATTR(init, -1); /* fixed up in eeepc_hotk_add() */
+EEEPC_CREATE_DEVICE_ATTR(lid, CM_ASL_LID);
+EEEPC_CREATE_DEVICE_ATTR(wlan, CM_ASL_WLAN);
+
+static struct attribute *platform_attributes[] = {
+ &dev_attr_brn.attr,
+ &dev_attr_camera.attr,
+ &dev_attr_cardr.attr,
+ &dev_attr_cpufv.attr,
+ &dev_attr_disp.attr,
+ &dev_attr_hdps.attr,
+ &dev_attr_init.attr,
+ &dev_attr_lid.attr,
+ &dev_attr_wlan.attr,
+ NULL
+};
+
+static struct attribute_group platform_attribute_group = {
+ .attrs = platform_attributes
+};
+
+static int eeepc_hotk_check(void)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ int result;
+
+ result = acpi_bus_get_status(ehotk->device);
+ if (result)
+ return result;
+ if (ehotk->device->status.present) {
+ if (!write_acpi_int(ehotk->handle, "INIT", init_flag,
+ &buffer)) {
+ printk(EEEPC_ERR "Hotkey initialization failed\n");
+ return -ENODEV;
+ } else {
+ printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
+ init_flag);
+ }
+ /* get control methods supported */
+ if (!read_acpi_int(ehotk->handle, "CMSG"
+ , &ehotk->cm_supported)) {
+ printk(EEEPC_ERR
+ "Get control methods supported failed\n");
+ return -ENODEV;
+ } else {
+ printk(EEEPC_INFO
+ "Get control methods supported: 0x%x\n",
+ ehotk->cm_supported);
+ }
+ ehotk->cm_supported |= (0x1 << CM_ASL_LID);
+ } else {
+ printk(EEEPC_ERR "Hotkey device not present, aborting\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
+{
+ if (!ehotk)
+ return;
+ /* if DISABLE_ASL_WLAN is set, the notify code for fn+f2
+ will always be 0x10 */
+ if (event == NOTIFY_WLAN_ON && (DISABLE_ASL_WLAN & init_flag)) {
+ int value;
+ if (ehotk->cm_supported & (0x1 << CM_ASL_WLAN)) {
+ const char *method = cm_getv[CM_ASL_WLAN];
+ if (!read_acpi_int(ehotk->handle, method, &value))
+ printk(EEEPC_WARNING "Error reading %s\n",
+ method);
+ else if (value == 1)
+ event = 0x11;
+ }
+ }
+ acpi_bus_generate_proc_event(ehotk->device, event,
+ ehotk->event_count[event % 128]++);
+}
+
+static int ehotk_found;
+
+static int eeepc_hotk_add(struct acpi_device *device)
+{
+ acpi_status status = AE_OK;
+ int result;
+
+ if (!device)
+ return -EINVAL;
+ printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
+ ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
+ if (!ehotk)
+ return -ENOMEM;
+ ehotk->handle = device->handle;
+ strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
+ strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
+ acpi_driver_data(device) = ehotk;
+ ehotk->device = device;
+ result = eeepc_hotk_check();
+ if (result)
+ goto end;
+ dev_attr_init.show = NULL;
+ dev_attr_init.store = real_store_init;
+ status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
+ eeepc_hotk_notify, ehotk);
+ if (ACPI_FAILURE(status))
+ printk(EEEPC_ERR "Error installing notify handler\n");
+ ehotk_found = 1;
+ end:
+ if (result)
+ kfree(ehotk);
+ return result;
+}
+
+static int eeepc_hotk_remove(struct acpi_device *device, int type)
+{
+ acpi_status status = 0;
+
+ if (!device || !acpi_driver_data(device))
+ return -EINVAL;
+ status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
+ eeepc_hotk_notify);
+ if (ACPI_FAILURE(status))
+ printk(EEEPC_ERR "Error removing notify handler\n");
+ kfree(ehotk);
+ return 0;
+}
+
+static struct platform_driver platform_driver = {
+ .driver = {
+ .name = EEEPC_HOTK_FILE,
+ .owner = THIS_MODULE,
+ }
+};
+
+static struct platform_device *platform_device;
+
+static void __exit eeepc_hotk_exit(void)
+{
+ acpi_bus_unregister_driver(&eeepc_hotk_driver);
+ sysfs_remove_group(&platform_device->dev.kobj,
+ &platform_attribute_group);
+ platform_device_unregister(platform_device);
+ platform_driver_unregister(&platform_driver);
+}
+
+static int __init eeepc_hotk_init(void)
+{
+ struct device *dev;
+ int result;
+
+ if (acpi_disabled)
+ return -ENODEV;
+ init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
+ result = acpi_bus_register_driver(&eeepc_hotk_driver);
+ if (result < 0)
+ return result;
+ if (!ehotk_found) {
+ acpi_bus_unregister_driver(&eeepc_hotk_driver);
+ return -ENODEV;
+ }
+ dev = acpi_get_physical_device(ehotk->device->handle);
+ /* Register platform stuff */
+ result = platform_driver_register(&platform_driver);
+ if (result)
+ goto fail_platform_driver;
+ platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
+ if (!platform_device) {
+ result = -ENOMEM;
+ goto fail_platform_device1;
+ }
+ result = platform_device_add(platform_device);
+ if (result)
+ goto fail_platform_device2;
+ result = sysfs_create_group(&platform_device->dev.kobj,
+ &platform_attribute_group);
+ if (result)
+ goto fail_sysfs;
+ return 0;
+ fail_sysfs:
+ platform_device_del(platform_device);
+ fail_platform_device2:
+ platform_device_put(platform_device);
+ fail_platform_device1:
+ platform_driver_unregister(&platform_driver);
+ fail_platform_driver:
+ return result;
+}
+
+module_init(eeepc_hotk_init);
+module_exit(eeepc_hotk_exit);
--
1.5.3.8
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