path: root/drivers/acpi/ibm_acpi.c

/*
 *  ibm_acpi.c - IBM ThinkPad ACPI Extras
 *
 *
 *  Copyright (C) 2004 Borislav Deianov
 *
 *  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
 *
 *  Changelog:
 *
 *  2004-08-09	0.1	initial release, support for X series
 *  2004-08-14	0.2	support for T series, X20
 *			bluetooth enable/disable
 *			hotkey events disabled by default
 *			removed fan control, currently useless
 *  2004-08-17	0.3	support for R40
 *			lcd off, brightness control
 *			thinklight on/off
 *  2004-09-16	0.4	support for module parameters
 *			hotkey mask can be prefixed by 0x
 *			video output switching
 *			video expansion control
 *			ultrabay eject support
 *			removed lcd brightness/on/off control, didn't work
 *  2004-10-18	0.5	thinklight support on A21e, G40, R32, T20, T21, X20
 *			proc file format changed
 *			video_switch command
 *			experimental cmos control
 *			experimental led control
 *			experimental acpi sounds
 *  2004-10-19	0.6	use acpi_bus_register_driver() to claim HKEY device
 *  2004-10-23	0.7	fix module loading on A21e, A22p, T20, T21, X20
 *			fix LED control on A21e
 *  2004-11-08	0.8	fix init error case, don't return from a macro
 *				thanks to Chris Wright <chrisw@osdl.org>
 */

#define IBM_VERSION "0.8"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <asm/uaccess.h>

#include <acpi/acpi_drivers.h>
#include <acpi/acnamesp.h>

#define IBM_NAME "ibm"
#define IBM_DESC "IBM ThinkPad ACPI Extras"
#define IBM_FILE "ibm_acpi"
#define IBM_URL "http://ibm-acpi.sf.net/"

#define IBM_DIR IBM_NAME

#define IBM_LOG IBM_FILE ": "
#define IBM_ERR	   KERN_ERR    IBM_LOG
#define IBM_NOTICE KERN_NOTICE IBM_LOG
#define IBM_INFO   KERN_INFO   IBM_LOG
#define IBM_DEBUG  KERN_DEBUG  IBM_LOG

#define IBM_MAX_ACPI_ARGS 3

#define __unused __attribute__ ((unused))

static int experimental;
module_param(experimental, int, 0);

static acpi_handle root_handle = NULL;

#define IBM_HANDLE(object, parent, paths...)			\
	static acpi_handle  object##_handle;			\
	static acpi_handle *object##_parent = &parent##_handle;	\
	static char        *object##_paths[] = { paths }

IBM_HANDLE(ec, root,
	   "\\_SB.PCI0.ISA.EC",    /* A21e, A22p, T20, T21, X20 */
	   "\\_SB.PCI0.LPC.EC",    /* all others */
);

IBM_HANDLE(vid, root, 
	   "\\_SB.PCI0.VID",       /* A21e, G40, X30, X40 */
	   "\\_SB.PCI0.AGP.VID",   /* all others */
);

IBM_HANDLE(cmos, root,
	   "\\UCMS",               /* R50, R50p, R51, T4x, X31, X40 */
	   "\\CMOS",               /* A3x, G40, R32, T23, T30, X22, X24, X30 */
	   "\\CMS",                /* R40, R40e */
);                                 /* A21e, A22p, T20, T21, X20 */

IBM_HANDLE(dock, root,
	   "\\_SB.GDCK",           /* X30, X31, X40 */
	   "\\_SB.PCI0.DOCK",      /* A22p, T20, T21, X20 */
	   "\\_SB.PCI0.PCI1.DOCK", /* all others */
);                                 /* A21e, G40, R32, R40, R40e */

IBM_HANDLE(bay, root,
	   "\\_SB.PCI0.IDE0.SCND.MSTR");      /* all except A21e */
IBM_HANDLE(bayej, root,
	   "\\_SB.PCI0.IDE0.SCND.MSTR._EJ0"); /* all except A2x, A3x */

IBM_HANDLE(lght, root, "\\LGHT");  /* A21e, A22p, T20, T21, X20 */
IBM_HANDLE(hkey, ec,   "HKEY");    /* all */
IBM_HANDLE(led,  ec,   "LED");     /* all except A21e, A22p, T20, T21, X20 */
IBM_HANDLE(sysl, ec,   "SYSL");    /* A21e, A22p, T20, T21, X20 */
IBM_HANDLE(bled, ec,   "BLED");    /* A22p, T20, T21, X20 */
IBM_HANDLE(beep, ec,   "BEEP");    /* all models */

struct ibm_struct {
	char *name;

	char *hid;
	struct acpi_driver *driver;
	
	int  (*init)   (struct ibm_struct *);
	int  (*read)   (struct ibm_struct *, char *);
	int  (*write)  (struct ibm_struct *, char *)