TC1100 WMI patch
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Summary
This is a patch for TC1100 that enables some ACPI features, like WLAN power and brightness control.
Patch listing
diff -rN -c linux-source-2.6.22/drivers/acpi/Kconfig linux-source-2.6.22-tc1100/drivers/acpi/Kconfig
*** linux-source-2.6.22/drivers/acpi/Kconfig 2007-10-15 00:33:09.000000000 +0200
--- linux-source-2.6.22-tc1100/drivers/acpi/Kconfig 2007-11-16 23:43:57.000000000 +0100
***************
*** 375,380 ****
--- 375,389 ----
A "Smart Battery" is quite old and quite rare compared
to today's ACPI "Control Method" battery.
+ config ACPI_TC1100
+ tristate "TC1100 ACPI Extensions"
+ default n
+ help
+ This is a driver for vendor-specific ACPI extensions
+ (WLAN and Bluetooth power and brightness control)
+ of the HP/Compaq TC1100 tablet. Do not enable unless
+ you happen to have a TC1100.
+
endif # ACPI
endmenu
diff -rN -c linux-source-2.6.22/drivers/acpi/Makefile linux-source-2.6.22-tc1100/drivers/acpi/Makefile
*** linux-source-2.6.22/drivers/acpi/Makefile 2007-07-09 01:32:17.000000000 +0200
--- linux-source-2.6.22-tc1100/drivers/acpi/Makefile 2007-11-16 23:45:37.000000000 +0100
***************
*** 57,62 ****
--- 57,63 ----
obj-$(CONFIG_ACPI_NUMA) += numa.o
obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o
obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
+ obj-$(CONFIG_ACPI_TC1100) += tc1100-wmi.o
obj-$(CONFIG_ACPI_HOTPLUG_MEMORY) += acpi_memhotplug.o
obj-y += cm_sbs.o
obj-$(CONFIG_ACPI_SBS) += sbs.o
diff -rN -c linux-source-2.6.22/drivers/acpi/tc1100-wmi.c linux-source-2.6.22-tc1100/drivers/acpi/tc1100-wmi.c
*** linux-source-2.6.22/drivers/acpi/tc1100-wmi.c 1970-01-01 01:00:00.000000000 +0100
--- linux-source-2.6.22-tc1100/drivers/acpi/tc1100-wmi.c 2007-11-17 01:52:40.000000000 +0100
***************
*** 0 ****
--- 1,594 ----
+ /*
+ * wmi.c - ACPI Windows Management Interface Driver ($Revision: 1.1 $)
+ *
+ * Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com>
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+ #include <linux/kernel.h>
+ #include <linux/module.h>
+ #include <linux/init.h>
+ #include <linux/types.h>
+ #include <linux/proc_fs.h>
+ #include <linux/seq_file.h>
+ #include <acpi/acpi.h>
+ #include <acpi/actypes.h>
+ #include <acpi/acpi_bus.h>
+ #include <acpi/acpi_drivers.h>
+ #include <asm/uaccess.h>
+
+ #define WMI_COMPONENT 0x40000000
+ #define WMI_CLASS "wmi"
+ #define WMI_HID "PNP0C14"
+ #define WMI_DRIVER_NAME "ACPI WMI Driver"
+ #define WMI_DEVICE_NAME "Windows Management Interface"
+ #define WMI_FILE_STATE "state"
+ #define WMI_FILE_WLAN "wlan"
+ #define WMI_FILE_BLUETOOTH "bluetooth"
+ #define WMI_NOTIFY_STATUS 0x80
+ #define WMI_STATUS_OFFLINE 0x0D
+ #define WMI_STATUS_ONLINE 0x0F
+ #define WMI_STATUS_UNKNOWN 0xFF
+
+ #define _COMPONENT WMI_COMPONENT
+ ACPI_MODULE_NAME ("wmi")
+
+ MODULE_AUTHOR("Jamey Hicks");
+ MODULE_DESCRIPTION(WMI_DRIVER_NAME);
+ MODULE_LICENSE("GPL");
+
+ int wmi_add (struct acpi_device *device);
+ int wmi_remove (struct acpi_device *device, int type);
+ static int wmi_start (struct acpi_device *device);
+ static int wmi_stop (struct acpi_device *device, int type);
+ static int wmi_open_fs(struct inode *inode, struct file *file);
+
+ static struct acpi_driver wmi_driver = {
+ .name = WMI_DRIVER_NAME,
+ .class = WMI_CLASS,
+ .ids = WMI_HID,
+ .ops = {
+ .add = wmi_add,
+ .remove = wmi_remove,
+ .start = wmi_start,
+ .stop = wmi_stop,
+ },
+ };
+
+ struct wmi {
+ acpi_handle handle;
+ unsigned long wlan;
+ unsigned long bluetooth;
+ unsigned long state[3];
+ };
+
+ static int wmi_set_state (struct wmi *wmi);
+
+ static struct file_operations wmi_fops = {
+ .open = wmi_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ };
+
+ /* --------------------------------------------------------------------------
+ WMI Management
+ -------------------------------------------------------------------------- */
+
+ static int
+ wmi_get_state (
+ struct wmi *wmi)
+ {
+ acpi_status status = AE_OK;
+ union acpi_object params_objects[2];
+ struct acpi_object_list params;
+ int i;
+
+ ACPI_FUNCTION_TRACE("wmi_get_state");
+
+ if (!wmi)
+ return_VALUE(-EINVAL);
+
+ for (i = 0; i < 3; i++) {
+ params.count = 1;
+ params.pointer = params_objects;
+ params_objects[0].integer.type = ACPI_TYPE_INTEGER;
+ params_objects[0].integer.value = i;
+ printk("calling WQBA\n");
+ status = acpi_evaluate_integer(wmi->handle, "WQBA", ¶ms, &wmi->state[i]);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error reading WMI state\n"));
+ wmi->state[i] = WMI_STATUS_UNKNOWN;
+ return_VALUE(-ENODEV);
+ }
+ }
+ wmi->wlan = (wmi->state[1] == 3) ? 1 : 0;
+ wmi->bluetooth = (wmi->state[2] == 1) ? 1 : 0;
+
+ return_VALUE(0);
+ }
+
+ static int
+ wmi_set_state (struct wmi *wmi)
+ {
+ acpi_status status = AE_OK;
+ union acpi_object params_objects[2];
+ struct acpi_object_list params;
+ int val;
+ struct acpi_buffer ret;
+
+ ACPI_FUNCTION_TRACE("wmi_set_state");
+ printk("calling WSBA\n");
+
+ if (!wmi)
+ return_VALUE(-EINVAL);
+
+ printk("calling WSBA index=1 val=%ld\n", wmi->state[1]);
+ val = wmi->wlan ? 1 : 2;
+ params.count = 2;
+ params.pointer = params_objects;
+ params_objects[0].integer.type = ACPI_TYPE_INTEGER;
+ params_objects[0].integer.value = 1;
+ params_objects[1].integer.type = ACPI_TYPE_INTEGER;
+ params_objects[1].integer.value = val;
+ status = acpi_evaluate_object(wmi->handle, "WSBA", ¶ms, &ret);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error calling wsba state: status=%x\n", status));
+ }
+
+ printk("calling WSBA index=2 val=%ld\n", wmi->state[1]);
+ val = wmi->bluetooth ? 0 : 1;
+ params.count = 2;
+ params.pointer = params_objects;
+ params_objects[0].integer.type = ACPI_TYPE_INTEGER;
+ params_objects[0].integer.value = 2;
+ params_objects[1].integer.type = ACPI_TYPE_INTEGER;
+ params_objects[1].integer.value = val;
+ status = acpi_evaluate_object(wmi->handle, "WSBA", ¶ms, &ret);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error calling wsba state: status=%x\n", status));
+ }
+
+ return_VALUE(0);
+ }
+ /* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+ struct proc_dir_entry *wmi_dir;
+
+ int wmi_seq_show(struct seq_file *seq, void *offset)
+ {
+ struct wmi *wmi = (struct wmi *) seq->private;
+ int i;
+
+ ACPI_FUNCTION_TRACE("wmi_seq_show");
+
+ if (!wmi)
+ return 0;
+
+ if (wmi_get_state(wmi)) {
+ seq_puts(seq, "ERROR: Unable to read WMI state\n");
+ return 0;
+ }
+
+ seq_puts(seq, "state: ");
+ for (i = 0; i < 3; i++)
+ seq_printf(seq, " %ld", wmi->state[i]);
+ seq_puts(seq, "\n");
+ return 0;
+ }
+
+ static int wmi_open_fs(struct inode *inode, struct file *file)
+ {
+ return single_open(file, wmi_seq_show, PDE(inode)->data);
+ }
+
+ static int
+ wlan_write_state (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+ {
+ struct seq_file *m = (struct seq_file *) file->private_data;
+ struct wmi *wmi = (struct wmi *) m->private;
+ char str[64];
+ int error = 0;
+
+ printk("wmi_write_state: wmi=%p\n", wmi);
+
+ if (count > sizeof(str) - 1)
+ goto Done;
+ memset(str,0,sizeof(str));
+ if (copy_from_user(str, buffer, count))
+ return -EFAULT;
+
+ if (strncmp(str, "on", 2) == 0) {
+ wmi->wlan = 1;
+ } else if (strncmp(str, "off", 3) == 0) {
+ wmi->wlan = 0;
+ } else {
+ wmi->wlan = simple_strtoul(str, NULL, 0);
+ }
+ error = wmi_set_state(wmi);
+
+ Done:
+ return error ? error : count;
+ }
+
+ int wlan_seq_show(struct seq_file *seq, void *offset)
+ {
+ struct wmi *wmi = (struct wmi *) seq->private;
+
+ ACPI_FUNCTION_TRACE("wlan_seq_show");
+
+ if (!wmi)
+ return 0;
+
+ if (wmi_get_state(wmi)) {
+ seq_puts(seq, "ERROR: Unable to read wmi state\n");
+ return 0;
+ }
+
+ seq_puts(seq, wmi->wlan ? "on\n" : "off\n");
+ return 0;
+ }
+
+ static int wlan_open_fs(struct inode *inode, struct file *file)
+ {
+ return single_open(file, wlan_seq_show, PDE(inode)->data);
+ }
+
+ static struct file_operations wlan_fops = {
+ .open = wlan_open_fs,
+ .read = seq_read,
+ .write = wlan_write_state,
+ .llseek = seq_lseek,
+ .release = single_release,
+ };
+
+ static int
+ bluetooth_write_state (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+ {
+ struct seq_file *m = (struct seq_file *) file->private_data;
+ struct wmi *wmi = (struct wmi *) m->private;
+ char str[64];
+ int error = 0;
+
+ printk("wmi_write_state: wmi=%p\n", wmi);
+
+ if (count > sizeof(str) - 1)
+ goto Done;
+ memset(str,0,sizeof(str));
+ if (copy_from_user(str, buffer, count))
+ return -EFAULT;
+
+ if (strncmp(str, "on", 2) == 0) {
+ wmi->bluetooth = 1;
+ } else if (strncmp(str, "off", 3) == 0) {
+ wmi->bluetooth = 0;
+ } else {
+ wmi->bluetooth = simple_strtoul(str, NULL, 0);
+ }
+ error = wmi_set_state(wmi);
+
+ Done:
+ return error ? error : count;
+ }
+
+ int bluetooth_seq_show(struct seq_file *seq, void *offset)
+ {
+ struct wmi *wmi = (struct wmi *) seq->private;
+
+ ACPI_FUNCTION_TRACE("bluetooth_seq_show");
+
+ if (!wmi)
+ return 0;
+
+ if (wmi_get_state(wmi)) {
+ seq_puts(seq, "ERROR: Unable to read wmi state\n");
+ return 0;
+ }
+
+ seq_puts(seq, wmi->bluetooth ? "on\n" : "off\n");
+ return 0;
+ }
+
+ static int bluetooth_open_fs(struct inode *inode, struct file *file)
+ {
+ return single_open(file, bluetooth_seq_show, PDE(inode)->data);
+ }
+
+ static struct file_operations bluetooth_fops = {
+ .open = bluetooth_open_fs,
+ .read = seq_read,
+ .write = bluetooth_write_state,
+ .llseek = seq_lseek,
+ .release = single_release,
+ };
+
+ static int
+ wmi_add_fs (
+ struct acpi_device *device)
+ {
+ struct proc_dir_entry *entry = NULL;
+
+ ACPI_FUNCTION_TRACE("wmi_add_fs");
+
+ if (!acpi_device_dir(device)) {
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+ wmi_dir);
+ if (!acpi_device_dir(device))
+ return_VALUE(-ENODEV);
+ }
+
+ /* 'state' [R] */
+ entry = create_proc_entry(WMI_FILE_STATE,
+ S_IRUGO, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ WMI_FILE_STATE));
+ else {
+ entry->proc_fops = &wmi_fops;
+ entry->data = acpi_driver_data(device);
+ }
+
+ entry = create_proc_entry(WMI_FILE_WLAN,
+ S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ WMI_FILE_STATE));
+ else {
+ entry->proc_fops = &wlan_fops;
+ entry->data = acpi_driver_data(device);
+ }
+
+ entry = create_proc_entry(WMI_FILE_BLUETOOTH,
+ S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ WMI_FILE_STATE));
+ else {
+ entry->proc_fops = &bluetooth_fops;
+ entry->data = acpi_driver_data(device);
+ }
+
+ return_VALUE(0);
+ }
+
+
+ static int
+ wmi_remove_fs (
+ struct acpi_device *device)
+ {
+ ACPI_FUNCTION_TRACE("wmi_remove_fs");
+
+ if (acpi_device_dir(device)) {
+ remove_proc_entry(WMI_FILE_STATE, acpi_device_dir(device));
+ remove_proc_entry(WMI_FILE_WLAN, acpi_device_dir(device));
+ remove_proc_entry(WMI_FILE_BLUETOOTH, acpi_device_dir(device));
+ remove_proc_entry(acpi_device_bid(device), wmi_dir);
+ acpi_device_dir(device) = NULL;
+ }
+
+ return_VALUE(0);
+ }
+
+
+ /* --------------------------------------------------------------------------
+ Driver Model
+ -------------------------------------------------------------------------- */
+
+ void
+ wmi_notify (
+ acpi_handle handle,
+ u32 event,
+ void *data)
+ {
+ struct wmi *wmi = (struct wmi *) data;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("wmi_notify");
+
+ if (!wmi)
+ return;
+
+ if (acpi_bus_get_device(wmi->handle, &device))
+ return_VOID;
+
+ switch (event) {
+ case WMI_NOTIFY_STATUS:
+ wmi_get_state(wmi);
+ acpi_bus_generate_event(device, event, (u32) wmi->state);
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+
+ return_VOID;
+ }
+
+
+ int
+ wmi_add (
+ struct acpi_device *device)
+ {
+ int result = 0;
+ struct wmi *wacom = NULL;
+
+ ACPI_FUNCTION_TRACE("wmi_add");
+ printk("wmi_add device=%p\n", device);
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ wacom = kmalloc(sizeof(struct wmi), GFP_KERNEL);
+ if (!wacom)
+ return_VALUE(-ENOMEM);
+ memset(wacom, 0, sizeof(struct wmi));
+
+ wacom->handle = device->handle;
+ strcpy(acpi_device_name(device), WMI_DEVICE_NAME);
+ strcpy(acpi_device_class(device), WMI_CLASS);
+ acpi_driver_data(device) = wacom;
+
+ result = wmi_get_state(wacom);
+ if (result)
+ goto end;
+
+ result = wmi_add_fs(device);
+ if (result)
+ goto end;
+
+ #if 0
+ status = acpi_install_notify_handler(wmi->handle,
+ ACPI_DEVICE_NOTIFY, wmi_notify, ac);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error installing notify handler\n"));
+ result = -ENODEV;
+ goto end;
+ }
+ #endif
+
+ printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ wacom->state?"on-line":"off-line");
+
+ end:
+ if (result) {
+ wmi_remove_fs(device);
+ kfree(wacom);
+ }
+
+ return_VALUE(result);
+ }
+
+
+ int
+ wmi_remove (
+ struct acpi_device *device,
+ int type)
+ {
+ struct wmi *wmi = NULL;
+
+ ACPI_FUNCTION_TRACE("wmi_remove");
+
+ if (!device || !acpi_driver_data(device))
+ return_VALUE(-EINVAL);
+
+ wmi = (struct wmi *) acpi_driver_data(device);
+
+ wmi_remove_fs(device);
+
+ kfree(wmi);
+
+ return_VALUE(0);
+ }
+
+ static int
+ wmi_start (
+ struct acpi_device *device)
+ {
+ struct wmi *wacom = NULL;
+
+ ACPI_FUNCTION_TRACE("wmi_start");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ wacom = acpi_driver_data(device);
+
+ if (!wacom)
+ return_VALUE(-EINVAL);
+
+ return_VALUE(AE_OK);
+ }
+
+
+ static int
+ wmi_stop (
+ struct acpi_device *device,
+ int type)
+ {
+ struct wmi *wacom = NULL;
+
+ ACPI_FUNCTION_TRACE("wmi_stop");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ wacom = acpi_driver_data(device);
+
+ return_VALUE(0);
+ }
+
+ int __init
+ wmi_init (void)
+ {
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("wmi_init");
+
+ wmi_dir = proc_mkdir(WMI_CLASS, acpi_root_dir);
+ if (!wmi_dir)
+ return_VALUE(-ENODEV);
+
+ result = acpi_bus_register_driver(&wmi_driver);
+ if (result < 0) {
+ remove_proc_entry(WMI_CLASS, acpi_root_dir);
+ return_VALUE(-ENODEV);
+ }
+
+ return_VALUE(0);
+ }
+
+
+ void __exit
+ wmi_exit (void)
+ {
+ ACPI_FUNCTION_TRACE("wmi_exit");
+
+ acpi_bus_unregister_driver(&wmi_driver);
+
+ remove_proc_entry(WMI_CLASS, acpi_root_dir);
+
+ return_VOID;
+ }
+
+
+ module_init(wmi_init);
+ module_exit(wmi_exit);
+