TC1100 WMI patch

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-tc1100/drivers/acpi/Kconfig	2007-11-16 23:43:57.000000000 +0100 --- 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-tc1100/drivers/acpi/Makefile	2007-11-16 23:45:37.000000000 +0100 --- 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-tc1100/drivers/acpi/tc1100-wmi.c	2007-11-17 01:52:40.000000000 +0100 --- 1,594 + /* + *  wmi.c - ACPI Windows Management Interface Driver ($Revision: 1.1 $) + * +  *  Copyright (C) 2004 Jamey Hicks  + *  Copyright (C) 2001, 2002 Andy Grover  + *  Copyright (C) 2001, 2002 Paul Diefenbaugh  + * +  * +  * +  *  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  + #include  + #include  + #include  + #include  + #include  + #include  + #include  + #include  + #include  + #include  + + #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", &params, &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", &params, &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", &params, &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); +
 * linux-source-2.6.22/drivers/acpi/Kconfig	2007-10-15 00:33:09.000000000 +0200
 * 375,380 ****
 * 375,380 ****
 * linux-source-2.6.22/drivers/acpi/Makefile	2007-07-09 01:32:17.000000000 +0200
 * 57,62 ****
 * 57,62 ****
 * linux-source-2.6.22/drivers/acpi/tc1100-wmi.c	1970-01-01 01:00:00.000000000 +0100
 * 0 ****
 * 0 ****