2 * thinkpad_acpi.c - ThinkPad ACPI Extras
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
24 #define IBM_VERSION "0.14"
28 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
31 * 2006-11-22 0.13 new maintainer
32 * changelog now lives in git commit history, and will
33 * not be updated further in-file.
35 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
36 * 2005-03-17 0.11 support for 600e, 770x
37 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
38 * support for 770e, G41
39 * G40 and G41 don't have a thinklight
40 * temperatures no longer experimental
41 * experimental brightness control
42 * experimental volume control
43 * experimental fan enable/disable
44 * 2005-01-16 0.10 fix module loading on R30, R31
45 * 2005-01-16 0.9 support for 570, R30, R31
46 * ultrabay support on A22p, A3x
47 * limit arg for cmos, led, beep, drop experimental status
48 * more capable led control on A21e, A22p, T20-22, X20
49 * experimental temperatures and fan speed
50 * experimental embedded controller register dump
51 * mark more functions as __init, drop incorrect __exit
53 * thanks to Henrik Brix Andersen <brix@gentoo.org>
54 * fix parameter passing on module loading
55 * thanks to Rusty Russell <rusty@rustcorp.com.au>
56 * thanks to Jim Radford <radford@blackbean.org>
57 * 2004-11-08 0.8 fix init error case, don't return from a macro
58 * thanks to Chris Wright <chrisw@osdl.org>
59 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
60 * fix led control on A21e
61 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
62 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
63 * proc file format changed
64 * video_switch command
65 * experimental cmos control
66 * experimental led control
67 * experimental acpi sounds
68 * 2004-09-16 0.4 support for module parameters
69 * hotkey mask can be prefixed by 0x
70 * video output switching
71 * video expansion control
72 * ultrabay eject support
73 * removed lcd brightness/on/off control, didn't work
74 * 2004-08-17 0.3 support for R40
75 * lcd off, brightness control
77 * 2004-08-14 0.2 support for T series, X20
78 * bluetooth enable/disable
79 * hotkey events disabled by default
80 * removed fan control, currently useless
81 * 2004-08-09 0.1 initial release, support for X series
84 #include "thinkpad_acpi.h"
86 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
87 MODULE_DESCRIPTION(IBM_DESC);
88 MODULE_VERSION(IBM_VERSION);
89 MODULE_LICENSE("GPL");
91 /* Please remove this in year 2009 */
92 MODULE_ALIAS("ibm_acpi");
94 #define __unused __attribute__ ((unused))
96 /****************************************************************************
97 ****************************************************************************
99 * ACPI Helpers and device model
101 ****************************************************************************
102 ****************************************************************************/
104 /*************************************************************************
108 static acpi_handle root_handle = NULL;
110 #define IBM_HANDLE(object, parent, paths...) \
111 static acpi_handle object##_handle; \
112 static acpi_handle *object##_parent = &parent##_handle; \
113 static char *object##_path; \
114 static char *object##_paths[] = { paths }
116 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
117 "\\_SB.PCI.ISA.EC", /* 570 */
118 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
119 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
120 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
121 "\\_SB.PCI0.ICH3.EC0", /* R31 */
122 "\\_SB.PCI0.LPC.EC", /* all others */
125 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
126 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
129 /*************************************************************************
133 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
134 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
135 "\\CMS", /* R40, R40e */
138 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
139 "^HKEY", /* R30, R31 */
140 "HKEY", /* all others */
144 /*************************************************************************
148 static int acpi_evalf(acpi_handle handle,
149 void *res, char *method, char *fmt, ...)
152 struct acpi_object_list params;
153 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
154 struct acpi_buffer result, *resultp;
155 union acpi_object out_obj;
163 printk(IBM_ERR "acpi_evalf() called with empty format\n");
176 params.pointer = &in_objs[0];
183 in_objs[params.count].integer.value = va_arg(ap, int);
184 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
186 /* add more types as needed */
188 printk(IBM_ERR "acpi_evalf() called "
189 "with invalid format character '%c'\n", c);
195 if (res_type != 'v') {
196 result.length = sizeof(out_obj);
197 result.pointer = &out_obj;
202 status = acpi_evaluate_object(handle, method, ¶ms, resultp);
207 *(int *)res = out_obj.integer.value;
208 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
211 success = status == AE_OK;
213 /* add more types as needed */
215 printk(IBM_ERR "acpi_evalf() called "
216 "with invalid format character '%c'\n", res_type);
220 if (!success && !quiet)
221 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
222 method, fmt0, status);
227 static void __unused acpi_print_int(acpi_handle handle, char *method)
231 if (acpi_evalf(handle, &i, method, "d"))
232 printk(IBM_INFO "%s = 0x%x\n", method, i);
234 printk(IBM_ERR "error calling %s\n", method);
237 static int acpi_ec_read(int i, u8 * p)
242 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
246 if (ec_read(i, p) < 0)
253 static int acpi_ec_write(int i, u8 v)
256 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
259 if (ec_write(i, v) < 0)
266 static int _sta(acpi_handle handle)
270 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
276 /*************************************************************************
280 static void ibm_handle_init(char *name,
281 acpi_handle *handle, acpi_handle parent,
282 char **paths, int num_paths, char **path)
287 for (i = 0; i < num_paths; i++) {
288 status = acpi_get_handle(parent, paths[i], handle);
289 if (ACPI_SUCCESS(status)) {
298 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
300 struct ibm_struct *ibm = data;
302 if (!ibm || !ibm->notify)
305 ibm->notify(ibm, event);
308 static int __init setup_notify(struct ibm_struct *ibm)
316 dbg_printk(TPACPI_DBG_INIT,
317 "setting up ACPI notify for %s\n", ibm->name);
319 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
321 printk(IBM_ERR "%s device not present\n", ibm->name);
325 acpi_driver_data(ibm->device) = ibm;
326 sprintf(acpi_device_class(ibm->device), "%s/%s",
327 IBM_ACPI_EVENT_PREFIX,
330 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
331 dispatch_notify, ibm);
332 if (ACPI_FAILURE(status)) {
333 if (status == AE_ALREADY_EXISTS) {
334 printk(IBM_NOTICE "another device driver is already handling %s events\n",
337 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
342 ibm->notify_installed = 1;
346 static int __init ibm_device_add(struct acpi_device *device)
351 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
355 dbg_printk(TPACPI_DBG_INIT,
356 "registering %s as an ACPI driver\n", ibm->name);
358 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
360 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
364 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
365 ibm->driver->ids = ibm->hid;
366 ibm->driver->ops.add = &ibm_device_add;
368 ret = acpi_bus_register_driver(ibm->driver);
370 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
375 ibm->driver_registered = 1;
381 /****************************************************************************
382 ****************************************************************************
386 ****************************************************************************
387 ****************************************************************************/
389 static int dispatch_read(char *page, char **start, off_t off, int count,
390 int *eof, void *data)
392 struct ibm_struct *ibm = data;
395 if (!ibm || !ibm->read)
398 len = ibm->read(page);
402 if (len <= off + count)
414 static int dispatch_write(struct file *file, const char __user * userbuf,
415 unsigned long count, void *data)
417 struct ibm_struct *ibm = data;
421 if (!ibm || !ibm->write)
424 kernbuf = kmalloc(count + 2, GFP_KERNEL);
428 if (copy_from_user(kernbuf, userbuf, count)) {
434 strcat(kernbuf, ",");
435 ret = ibm->write(kernbuf);
444 static char *next_cmd(char **cmds)
449 while ((end = strchr(start, ',')) && end == start)
461 /****************************************************************************
462 ****************************************************************************
466 ****************************************************************************
467 ****************************************************************************/
469 /*************************************************************************
470 * thinkpad-acpi init subdriver
473 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
475 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
476 printk(IBM_INFO "%s\n", IBM_URL);
478 if (ibm_thinkpad_ec_found)
479 printk(IBM_INFO "ThinkPad EC firmware %s\n",
480 ibm_thinkpad_ec_found);
485 static int thinkpad_acpi_driver_read(char *p)
489 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
490 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
495 static struct ibm_struct thinkpad_acpi_driver_data = {
497 .read = thinkpad_acpi_driver_read,
500 /*************************************************************************
504 static int hotkey_supported;
505 static int hotkey_mask_supported;
506 static int hotkey_orig_status;
507 static int hotkey_orig_mask;
509 static int __init hotkey_init(struct ibm_init_struct *iibm)
511 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
513 IBM_HANDLE_INIT(hkey);
515 /* hotkey not supported on 570 */
516 hotkey_supported = hkey_handle != NULL;
518 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
519 str_supported(hotkey_supported));
521 if (hotkey_supported) {
522 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
523 A30, R30, R31, T20-22, X20-21, X22-24 */
524 hotkey_mask_supported =
525 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
527 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
528 str_supported(hotkey_mask_supported));
530 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
534 return (hotkey_supported)? 0 : 1;
537 static void hotkey_exit(void)
539 if (hotkey_supported) {
540 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
541 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
545 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
549 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
550 acpi_bus_generate_event(ibm->device, event, hkey);
552 printk(IBM_ERR "unknown hotkey event %d\n", event);
553 acpi_bus_generate_event(ibm->device, event, 0);
557 static int hotkey_get(int *status, int *mask)
559 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
562 if (hotkey_mask_supported)
563 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
569 static int hotkey_set(int status, int mask)
573 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
576 if (hotkey_mask_supported)
577 for (i = 0; i < 32; i++) {
578 int bit = ((1 << i) & mask) != 0;
579 if (!acpi_evalf(hkey_handle,
580 NULL, "MHKM", "vdd", i + 1, bit))
587 static int hotkey_read(char *p)
592 if (!hotkey_supported) {
593 len += sprintf(p + len, "status:\t\tnot supported\n");
597 if (!hotkey_get(&status, &mask))
600 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
601 if (hotkey_mask_supported) {
602 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
603 len += sprintf(p + len,
604 "commands:\tenable, disable, reset, <mask>\n");
606 len += sprintf(p + len, "mask:\t\tnot supported\n");
607 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
613 static int hotkey_write(char *buf)
619 if (!hotkey_supported)
622 if (!hotkey_get(&status, &mask))
625 while ((cmd = next_cmd(&buf))) {
626 if (strlencmp(cmd, "enable") == 0) {
628 } else if (strlencmp(cmd, "disable") == 0) {
630 } else if (strlencmp(cmd, "reset") == 0) {
631 status = hotkey_orig_status;
632 mask = hotkey_orig_mask;
633 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
635 } else if (sscanf(cmd, "%x", &mask) == 1) {
642 if (do_cmd && !hotkey_set(status, mask))
648 static struct ibm_struct hotkey_driver_data = {
652 .write = hotkey_write,
654 .notify = hotkey_notify,
655 .handle = &hkey_handle,
656 .type = ACPI_DEVICE_NOTIFY,
659 /*************************************************************************
660 * Bluetooth subdriver
663 static int bluetooth_supported;
665 static int __init bluetooth_init(struct ibm_init_struct *iibm)
667 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
669 IBM_HANDLE_INIT(hkey);
671 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
672 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
673 bluetooth_supported = hkey_handle &&
674 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
676 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s\n",
677 str_supported(bluetooth_supported));
679 return (bluetooth_supported)? 0 : 1;
682 static int bluetooth_status(void)
686 if (!bluetooth_supported ||
687 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
693 static int bluetooth_read(char *p)
696 int status = bluetooth_status();
698 if (!bluetooth_supported)
699 len += sprintf(p + len, "status:\t\tnot supported\n");
700 else if (!(status & 1))
701 len += sprintf(p + len, "status:\t\tnot installed\n");
703 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
704 len += sprintf(p + len, "commands:\tenable, disable\n");
710 static int bluetooth_write(char *buf)
712 int status = bluetooth_status();
716 if (!bluetooth_supported)
719 while ((cmd = next_cmd(&buf))) {
720 if (strlencmp(cmd, "enable") == 0) {
722 } else if (strlencmp(cmd, "disable") == 0) {
729 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
735 static struct ibm_struct bluetooth_driver_data = {
737 .read = bluetooth_read,
738 .write = bluetooth_write,
741 /*************************************************************************
745 static int wan_supported;
747 static int __init wan_init(struct ibm_init_struct *iibm)
749 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
751 IBM_HANDLE_INIT(hkey);
753 wan_supported = hkey_handle &&
754 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
756 vdbg_printk(TPACPI_DBG_INIT, "wan is %s\n",
757 str_supported(wan_supported));
759 return (wan_supported)? 0 : 1;
762 static int wan_status(void)
766 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
772 static int wan_read(char *p)
775 int status = wan_status();
778 len += sprintf(p + len, "status:\t\tnot supported\n");
779 else if (!(status & 1))
780 len += sprintf(p + len, "status:\t\tnot installed\n");
782 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
783 len += sprintf(p + len, "commands:\tenable, disable\n");
789 static int wan_write(char *buf)
791 int status = wan_status();
798 while ((cmd = next_cmd(&buf))) {
799 if (strlencmp(cmd, "enable") == 0) {
801 } else if (strlencmp(cmd, "disable") == 0) {
808 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
814 static struct ibm_struct wan_driver_data = {
821 /*************************************************************************
825 static enum video_access_mode video_supported;
826 static int video_orig_autosw;
828 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
829 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
830 "\\_SB.PCI0.VID0", /* 770e */
831 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
832 "\\_SB.PCI0.AGP.VID", /* all others */
835 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
837 static int __init video_init(struct ibm_init_struct *iibm)
841 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
843 IBM_HANDLE_INIT(vid);
844 IBM_HANDLE_INIT(vid2);
846 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
847 /* G41, assume IVGA doesn't change */
848 vid_handle = vid2_handle;
851 /* video switching not supported on R30, R31 */
852 video_supported = TPACPI_VIDEO_NONE;
853 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
855 video_supported = TPACPI_VIDEO_570;
856 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
857 /* 600e/x, 770e, 770x */
858 video_supported = TPACPI_VIDEO_770;
861 video_supported = TPACPI_VIDEO_NEW;
863 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
864 str_supported(video_supported != TPACPI_VIDEO_NONE),
867 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
870 static void video_exit(void)
872 dbg_printk(TPACPI_DBG_EXIT, "restoring original video autoswitch mode\n");
873 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
876 static int video_status(void)
881 if (video_supported == TPACPI_VIDEO_570) {
882 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
884 } else if (video_supported == TPACPI_VIDEO_770) {
885 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
887 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
889 } else if (video_supported == TPACPI_VIDEO_NEW) {
890 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
891 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
894 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
895 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
897 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
904 static int video_autosw(void)
908 if (video_supported == TPACPI_VIDEO_570)
909 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
910 else if (video_supported == TPACPI_VIDEO_770 ||
911 video_supported == TPACPI_VIDEO_NEW)
912 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
917 static int video_switch(void)
919 int autosw = video_autosw();
922 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
924 ret = video_supported == TPACPI_VIDEO_570 ?
925 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
926 acpi_evalf(vid_handle, NULL, "VSWT", "v");
927 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
932 static int video_expand(void)
934 if (video_supported == TPACPI_VIDEO_570)
935 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
936 else if (video_supported == TPACPI_VIDEO_770)
937 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
939 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
942 static int video_switch2(int status)
946 if (video_supported == TPACPI_VIDEO_570) {
947 ret = acpi_evalf(NULL, NULL,
948 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
949 } else if (video_supported == TPACPI_VIDEO_770) {
950 int autosw = video_autosw();
951 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
954 ret = acpi_evalf(vid_handle, NULL,
955 "ASWT", "vdd", status * 0x100, 0);
957 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
959 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
960 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
966 static int video_read(char *p)
968 int status = video_status();
969 int autosw = video_autosw();
972 if (!video_supported) {
973 len += sprintf(p + len, "status:\t\tnot supported\n");
977 len += sprintf(p + len, "status:\t\tsupported\n");
978 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
979 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
980 if (video_supported == TPACPI_VIDEO_NEW)
981 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
982 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
983 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
984 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
985 if (video_supported == TPACPI_VIDEO_NEW)
986 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
987 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
988 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
993 static int video_write(char *buf)
996 int enable, disable, status;
998 if (!video_supported)
1001 enable = disable = 0;
1003 while ((cmd = next_cmd(&buf))) {
1004 if (strlencmp(cmd, "lcd_enable") == 0) {
1006 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1008 } else if (strlencmp(cmd, "crt_enable") == 0) {
1010 } else if (strlencmp(cmd, "crt_disable") == 0) {
1012 } else if (video_supported == TPACPI_VIDEO_NEW &&
1013 strlencmp(cmd, "dvi_enable") == 0) {
1015 } else if (video_supported == TPACPI_VIDEO_NEW &&
1016 strlencmp(cmd, "dvi_disable") == 0) {
1018 } else if (strlencmp(cmd, "auto_enable") == 0) {
1019 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
1021 } else if (strlencmp(cmd, "auto_disable") == 0) {
1022 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
1024 } else if (strlencmp(cmd, "video_switch") == 0) {
1025 if (!video_switch())
1027 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1028 if (!video_expand())
1034 if (enable || disable) {
1035 status = (video_status() & 0x0f & ~disable) | enable;
1036 if (!video_switch2(status))
1043 static struct ibm_struct video_driver_data = {
1046 .write = video_write,
1050 /*************************************************************************
1051 * Light (thinklight) subdriver
1054 static int light_supported;
1055 static int light_status_supported;
1057 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1058 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1060 static int __init light_init(struct ibm_init_struct *iibm)
1062 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1064 IBM_HANDLE_INIT(ledb);
1065 IBM_HANDLE_INIT(lght);
1066 IBM_HANDLE_INIT(cmos);
1068 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1069 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
1071 if (light_supported)
1072 /* light status not supported on
1073 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1074 light_status_supported = acpi_evalf(ec_handle, NULL,
1077 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1078 str_supported(light_supported));
1080 return (light_supported)? 0 : 1;
1083 static int light_read(char *p)
1088 if (!light_supported) {
1089 len += sprintf(p + len, "status:\t\tnot supported\n");
1090 } else if (!light_status_supported) {
1091 len += sprintf(p + len, "status:\t\tunknown\n");
1092 len += sprintf(p + len, "commands:\ton, off\n");
1094 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1096 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1097 len += sprintf(p + len, "commands:\ton, off\n");
1103 static int light_write(char *buf)
1105 int cmos_cmd, lght_cmd;
1109 if (!light_supported)
1112 while ((cmd = next_cmd(&buf))) {
1113 if (strlencmp(cmd, "on") == 0) {
1116 } else if (strlencmp(cmd, "off") == 0) {
1122 success = cmos_handle ?
1123 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1124 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1132 static struct ibm_struct light_driver_data = {
1135 .write = light_write,
1138 /*************************************************************************
1142 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1144 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1145 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1146 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1147 "\\_SB.PCI.ISA.SLCE", /* 570 */
1148 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1150 /* don't list other alternatives as we install a notify handler on the 570 */
1151 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1153 #define dock_docked() (_sta(dock_handle) & 1)
1155 static int __init dock_init(struct ibm_init_struct *iibm)
1157 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1159 IBM_HANDLE_INIT(dock);
1160 IBM_HANDLE_INIT(pci);
1162 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1163 str_supported(dock_handle != NULL));
1165 return (dock_handle)? 0 : 1;
1168 static void dock_notify(struct ibm_struct *ibm, u32 event)
1170 int docked = dock_docked();
1171 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1173 if (event == 1 && !pci) /* 570 */
1174 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1175 else if (event == 1 && pci) /* 570 */
1176 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1177 else if (event == 3 && docked)
1178 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1179 else if (event == 3 && !docked)
1180 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1181 else if (event == 0 && docked)
1182 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1184 printk(IBM_ERR "unknown dock event %d, status %d\n",
1185 event, _sta(dock_handle));
1186 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1190 static int dock_read(char *p)
1193 int docked = dock_docked();
1196 len += sprintf(p + len, "status:\t\tnot supported\n");
1198 len += sprintf(p + len, "status:\t\tundocked\n");
1200 len += sprintf(p + len, "status:\t\tdocked\n");
1201 len += sprintf(p + len, "commands:\tdock, undock\n");
1207 static int dock_write(char *buf)
1214 while ((cmd = next_cmd(&buf))) {
1215 if (strlencmp(cmd, "undock") == 0) {
1216 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1217 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1219 } else if (strlencmp(cmd, "dock") == 0) {
1220 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1229 static struct ibm_struct dock_driver_data[2] = {
1233 .write = dock_write,
1234 .notify = dock_notify,
1235 .handle = &dock_handle,
1236 .type = ACPI_SYSTEM_NOTIFY,
1241 .notify = dock_notify,
1242 .handle = &pci_handle,
1243 .type = ACPI_SYSTEM_NOTIFY,
1247 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1249 /*************************************************************************
1253 #ifdef CONFIG_THINKPAD_ACPI_BAY
1254 static int bay_status_supported;
1255 static int bay_status2_supported;
1256 static int bay_eject_supported;
1257 static int bay_eject2_supported;
1259 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1260 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1261 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1262 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1263 ); /* A21e, R30, R31 */
1264 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1265 "_EJ0", /* all others */
1266 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1267 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1268 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1270 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1274 static int __init bay_init(struct ibm_init_struct *iibm)
1276 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1278 IBM_HANDLE_INIT(bay);
1280 IBM_HANDLE_INIT(bay_ej);
1281 IBM_HANDLE_INIT(bay2);
1283 IBM_HANDLE_INIT(bay2_ej);
1285 bay_status_supported = bay_handle &&
1286 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1287 bay_status2_supported = bay2_handle &&
1288 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1290 bay_eject_supported = bay_handle && bay_ej_handle &&
1291 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1292 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1293 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1295 vdbg_printk(TPACPI_DBG_INIT,
1296 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1297 str_supported(bay_status_supported),
1298 str_supported(bay_eject_supported),
1299 str_supported(bay_status2_supported),
1300 str_supported(bay_eject2_supported));
1302 return (bay_status_supported || bay_eject_supported ||
1303 bay_status2_supported || bay_eject2_supported)? 0 : 1;
1306 static void bay_notify(struct ibm_struct *ibm, u32 event)
1308 acpi_bus_generate_event(ibm->device, event, 0);
1311 #define bay_occupied(b) (_sta(b##_handle) & 1)
1313 static int bay_read(char *p)
1316 int occupied = bay_occupied(bay);
1317 int occupied2 = bay_occupied(bay2);
1320 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1321 (occupied ? "occupied" : "unoccupied") :
1323 if (bay_status2_supported)
1324 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1325 "occupied" : "unoccupied");
1327 eject = bay_eject_supported && occupied;
1328 eject2 = bay_eject2_supported && occupied2;
1330 if (eject && eject2)
1331 len += sprintf(p + len, "commands:\teject, eject2\n");
1333 len += sprintf(p + len, "commands:\teject\n");
1335 len += sprintf(p + len, "commands:\teject2\n");
1340 static int bay_write(char *buf)
1344 if (!bay_eject_supported && !bay_eject2_supported)
1347 while ((cmd = next_cmd(&buf))) {
1348 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1349 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1351 } else if (bay_eject2_supported &&
1352 strlencmp(cmd, "eject2") == 0) {
1353 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1362 static struct ibm_struct bay_driver_data = {
1366 .notify = bay_notify,
1367 .handle = &bay_handle,
1368 .type = ACPI_SYSTEM_NOTIFY,
1371 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1373 /*************************************************************************
1377 static int __init cmos_init(struct ibm_init_struct *iibm)
1379 vdbg_printk(TPACPI_DBG_INIT,
1380 "initializing cmos commands subdriver\n");
1382 IBM_HANDLE_INIT(cmos);
1384 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1385 str_supported(cmos_handle != NULL));
1386 return (cmos_handle)? 0 : 1;
1389 static int cmos_eval(int cmos_cmd)
1392 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1397 static int cmos_read(char *p)
1401 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1402 R30, R31, T20-22, X20-21 */
1404 len += sprintf(p + len, "status:\t\tnot supported\n");
1406 len += sprintf(p + len, "status:\t\tsupported\n");
1407 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1413 static int cmos_write(char *buf)
1421 while ((cmd = next_cmd(&buf))) {
1422 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1423 cmos_cmd >= 0 && cmos_cmd <= 21) {
1428 if (!cmos_eval(cmos_cmd))
1435 static struct ibm_struct cmos_driver_data = {
1438 .write = cmos_write,
1441 /*************************************************************************
1445 static enum led_access_mode led_supported;
1447 IBM_HANDLE(led, ec, "SLED", /* 570 */
1448 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1449 "LED", /* all others */
1452 static int __init led_init(struct ibm_init_struct *iibm)
1454 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1456 IBM_HANDLE_INIT(led);
1459 /* led not supported on R30, R31 */
1460 led_supported = TPACPI_LED_NONE;
1461 else if (strlencmp(led_path, "SLED") == 0)
1463 led_supported = TPACPI_LED_570;
1464 else if (strlencmp(led_path, "SYSL") == 0)
1465 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1466 led_supported = TPACPI_LED_OLD;
1469 led_supported = TPACPI_LED_NEW;
1471 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1472 str_supported(led_supported), led_supported);
1474 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1477 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1479 static int led_read(char *p)
1483 if (!led_supported) {
1484 len += sprintf(p + len, "status:\t\tnot supported\n");
1487 len += sprintf(p + len, "status:\t\tsupported\n");
1489 if (led_supported == TPACPI_LED_570) {
1492 for (i = 0; i < 8; i++) {
1493 if (!acpi_evalf(ec_handle,
1494 &status, "GLED", "dd", 1 << i))
1496 len += sprintf(p + len, "%d:\t\t%s\n",
1497 i, led_status(status));
1501 len += sprintf(p + len, "commands:\t"
1502 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1507 /* off, on, blink */
1508 static const int led_sled_arg1[] = { 0, 1, 3 };
1509 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1510 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1511 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1513 static int led_write(char *buf)
1521 while ((cmd = next_cmd(&buf))) {
1522 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1525 if (strstr(cmd, "off")) {
1527 } else if (strstr(cmd, "on")) {
1529 } else if (strstr(cmd, "blink")) {
1534 if (led_supported == TPACPI_LED_570) {
1537 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1538 led, led_sled_arg1[ind]))
1540 } else if (led_supported == TPACPI_LED_OLD) {
1541 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1543 ret = ec_write(TPACPI_LED_EC_HLMS, led);
1546 ec_write(TPACPI_LED_EC_HLBL,
1547 led * led_exp_hlbl[ind]);
1550 ec_write(TPACPI_LED_EC_HLCL,
1551 led * led_exp_hlcl[ind]);
1556 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1557 led, led_led_arg1[ind]))
1565 static struct ibm_struct led_driver_data = {
1571 /*************************************************************************
1575 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1577 static int __init beep_init(struct ibm_init_struct *iibm)
1579 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1581 IBM_HANDLE_INIT(beep);
1583 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1584 str_supported(beep_handle != NULL));
1586 return (beep_handle)? 0 : 1;
1589 static int beep_read(char *p)
1594 len += sprintf(p + len, "status:\t\tnot supported\n");
1596 len += sprintf(p + len, "status:\t\tsupported\n");
1597 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1603 static int beep_write(char *buf)
1611 while ((cmd = next_cmd(&buf))) {
1612 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1613 beep_cmd >= 0 && beep_cmd <= 17) {
1617 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1624 static struct ibm_struct beep_driver_data = {
1627 .write = beep_write,
1630 /*************************************************************************
1634 static enum thermal_access_mode thermal_read_mode;
1636 static int __init thermal_init(struct ibm_init_struct *iibm)
1642 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1644 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1646 if (ibm_thinkpad_ec_found && experimental) {
1648 * Direct EC access mode: sensors at registers
1649 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1650 * non-implemented, thermal sensors return 0x80 when
1655 for (i = 0; i < 8; i++) {
1656 if (likely(acpi_ec_read(0x78 + i, &t))) {
1662 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1670 /* This is sheer paranoia, but we handle it anyway */
1673 "ThinkPad ACPI EC access misbehaving, "
1674 "falling back to ACPI TMPx access mode\n");
1675 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1678 "ThinkPad ACPI EC access misbehaving, "
1679 "disabling thermal sensors access\n");
1680 thermal_read_mode = TPACPI_THERMAL_NONE;
1685 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1687 } else if (acpi_tmp7) {
1688 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1689 /* 600e/x, 770e, 770x */
1690 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1692 /* Standard ACPI TMPx access, max 8 sensors */
1693 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1696 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1697 thermal_read_mode = TPACPI_THERMAL_NONE;
1700 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1701 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1704 return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1707 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1711 char tmpi[] = "TMPi";
1716 switch (thermal_read_mode) {
1717 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1718 case TPACPI_THERMAL_TPEC_16:
1719 for (i = 0; i < 8; i++) {
1720 if (!acpi_ec_read(0xC0 + i, &tmp))
1722 s->temp[i + 8] = tmp * 1000;
1726 case TPACPI_THERMAL_TPEC_8:
1727 for (i = 0; i < 8; i++) {
1728 if (!acpi_ec_read(0x78 + i, &tmp))
1730 s->temp[i] = tmp * 1000;
1732 return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
1734 case TPACPI_THERMAL_ACPI_UPDT:
1735 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1737 for (i = 0; i < 8; i++) {
1739 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1741 s->temp[i] = (t - 2732) * 100;
1745 case TPACPI_THERMAL_ACPI_TMP07:
1746 for (i = 0; i < 8; i++) {
1748 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1750 s->temp[i] = t * 1000;
1754 case TPACPI_THERMAL_NONE:
1760 static int thermal_read(char *p)
1764 struct ibm_thermal_sensors_struct t;
1766 n = thermal_get_sensors(&t);
1767 if (unlikely(n < 0))
1770 len += sprintf(p + len, "temperatures:\t");
1773 for (i = 0; i < (n - 1); i++)
1774 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1775 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1777 len += sprintf(p + len, "not supported\n");
1782 static struct ibm_struct thermal_driver_data = {
1784 .read = thermal_read,
1787 /*************************************************************************
1791 static u8 ecdump_regs[256];
1793 static int ecdump_read(char *p)
1799 len += sprintf(p + len, "EC "
1800 " +00 +01 +02 +03 +04 +05 +06 +07"
1801 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1802 for (i = 0; i < 256; i += 16) {
1803 len += sprintf(p + len, "EC 0x%02x:", i);
1804 for (j = 0; j < 16; j++) {
1805 if (!acpi_ec_read(i + j, &v))
1807 if (v != ecdump_regs[i + j])
1808 len += sprintf(p + len, " *%02x", v);
1810 len += sprintf(p + len, " %02x", v);
1811 ecdump_regs[i + j] = v;
1813 len += sprintf(p + len, "\n");
1818 /* These are way too dangerous to advertise openly... */
1820 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1821 " (<offset> is 00-ff, <value> is 00-ff)\n");
1822 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1823 " (<offset> is 00-ff, <value> is 0-255)\n");
1828 static int ecdump_write(char *buf)
1833 while ((cmd = next_cmd(&buf))) {
1834 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1836 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1840 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1841 if (!acpi_ec_write(i, v))
1850 static struct ibm_struct ecdump_driver_data = {
1852 .read = ecdump_read,
1853 .write = ecdump_write,
1857 /*************************************************************************
1858 * Backlight/brightness subdriver
1861 static struct backlight_device *ibm_backlight_device = NULL;
1863 static struct backlight_ops ibm_backlight_data = {
1864 .get_brightness = brightness_get,
1865 .update_status = brightness_update_status,
1868 static int __init brightness_init(struct ibm_init_struct *iibm)
1872 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
1874 b = brightness_get(NULL);
1878 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1879 &ibm_backlight_data);
1880 if (IS_ERR(ibm_backlight_device)) {
1881 printk(IBM_ERR "Could not register backlight device\n");
1882 return PTR_ERR(ibm_backlight_device);
1884 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
1886 ibm_backlight_device->props.max_brightness = 7;
1887 ibm_backlight_device->props.brightness = b;
1888 backlight_update_status(ibm_backlight_device);
1893 static void brightness_exit(void)
1895 if (ibm_backlight_device) {
1896 vdbg_printk(TPACPI_DBG_EXIT,
1897 "calling backlight_device_unregister()\n");
1898 backlight_device_unregister(ibm_backlight_device);
1899 ibm_backlight_device = NULL;
1903 static int brightness_update_status(struct backlight_device *bd)
1905 return brightness_set(
1906 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1907 bd->props.power == FB_BLANK_UNBLANK) ?
1908 bd->props.brightness : 0);
1911 static int brightness_get(struct backlight_device *bd)
1914 if (!acpi_ec_read(brightness_offset, &level))
1922 static int brightness_set(int value)
1924 int cmos_cmd, inc, i;
1925 int current_value = brightness_get(NULL);
1929 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
1930 inc = value > current_value ? 1 : -1;
1931 for (i = current_value; i != value; i += inc) {
1932 if (!cmos_eval(cmos_cmd))
1934 if (!acpi_ec_write(brightness_offset, i + inc))
1941 static int brightness_read(char *p)
1946 if ((level = brightness_get(NULL)) < 0) {
1947 len += sprintf(p + len, "level:\t\tunreadable\n");
1949 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1950 len += sprintf(p + len, "commands:\tup, down\n");
1951 len += sprintf(p + len, "commands:\tlevel <level>"
1952 " (<level> is 0-7)\n");
1958 static int brightness_write(char *buf)
1964 while ((cmd = next_cmd(&buf))) {
1965 if ((level = brightness_get(NULL)) < 0)
1969 if (strlencmp(cmd, "up") == 0) {
1970 new_level = level == 7 ? 7 : level + 1;
1971 } else if (strlencmp(cmd, "down") == 0) {
1972 new_level = level == 0 ? 0 : level - 1;
1973 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1974 new_level >= 0 && new_level <= 7) {
1979 brightness_set(new_level);
1985 static struct ibm_struct brightness_driver_data = {
1986 .name = "brightness",
1987 .read = brightness_read,
1988 .write = brightness_write,
1989 .exit = brightness_exit,
1992 /*************************************************************************
1996 static int volume_read(char *p)
2001 if (!acpi_ec_read(volume_offset, &level)) {
2002 len += sprintf(p + len, "level:\t\tunreadable\n");
2004 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2005 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2006 len += sprintf(p + len, "commands:\tup, down, mute\n");
2007 len += sprintf(p + len, "commands:\tlevel <level>"
2008 " (<level> is 0-15)\n");
2014 static int volume_write(char *buf)
2016 int cmos_cmd, inc, i;
2018 int new_level, new_mute;
2021 while ((cmd = next_cmd(&buf))) {
2022 if (!acpi_ec_read(volume_offset, &level))
2024 new_mute = mute = level & 0x40;
2025 new_level = level = level & 0xf;
2027 if (strlencmp(cmd, "up") == 0) {
2031 new_level = level == 15 ? 15 : level + 1;
2032 } else if (strlencmp(cmd, "down") == 0) {
2036 new_level = level == 0 ? 0 : level - 1;
2037 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2038 new_level >= 0 && new_level <= 15) {
2040 } else if (strlencmp(cmd, "mute") == 0) {
2045 if (new_level != level) { /* mute doesn't change */
2046 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2047 inc = new_level > level ? 1 : -1;
2049 if (mute && (!cmos_eval(cmos_cmd) ||
2050 !acpi_ec_write(volume_offset, level)))
2053 for (i = level; i != new_level; i += inc)
2054 if (!cmos_eval(cmos_cmd) ||
2055 !acpi_ec_write(volume_offset, i + inc))
2058 if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
2059 !acpi_ec_write(volume_offset,
2064 if (new_mute != mute) { /* level doesn't change */
2065 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2067 if (!cmos_eval(cmos_cmd) ||
2068 !acpi_ec_write(volume_offset, level + new_mute))
2076 static struct ibm_struct volume_driver_data = {
2078 .read = volume_read,
2079 .write = volume_write,
2082 /*************************************************************************
2089 * TPACPI_FAN_RD_ACPI_GFAN:
2090 * ACPI GFAN method: returns fan level
2092 * see TPACPI_FAN_WR_ACPI_SFAN
2093 * EC 0x2f (HFSP) not available if GFAN exists
2095 * TPACPI_FAN_WR_ACPI_SFAN:
2096 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2098 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2101 * TPACPI_FAN_WR_TPEC:
2102 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2103 * Supported on almost all ThinkPads
2105 * Fan speed changes of any sort (including those caused by the
2106 * disengaged mode) are usually done slowly by the firmware as the
2107 * maximum ammount of fan duty cycle change per second seems to be
2110 * Reading is not available if GFAN exists.
2111 * Writing is not available if SFAN exists.
2114 * 7 automatic mode engaged;
2115 * (default operation mode of the ThinkPad)
2116 * fan level is ignored in this mode.
2117 * 6 full speed mode (takes precedence over bit 7);
2118 * not available on all thinkpads. May disable
2119 * the tachometer while the fan controller ramps up
2120 * the speed (which can take up to a few *minutes*).
2121 * Speeds up fan to 100% duty-cycle, which is far above
2122 * the standard RPM levels. It is not impossible that
2123 * it could cause hardware damage.
2124 * 5-3 unused in some models. Extra bits for fan level
2125 * in others, but still useless as all values above
2126 * 7 map to the same speed as level 7 in these models.
2127 * 2-0 fan level (0..7 usually)
2129 * 0x07 = max (set when temperatures critical)
2130 * Some ThinkPads may have other levels, see
2131 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2133 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2134 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2135 * does so, its initial value is meaningless (0x07).
2137 * For firmware bugs, refer to:
2138 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2142 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2143 * Main fan tachometer reading (in RPM)
2145 * This register is present on all ThinkPads with a new-style EC, and
2146 * it is known not to be present on the A21m/e, and T22, as there is
2147 * something else in offset 0x84 according to the ACPI DSDT. Other
2148 * ThinkPads from this same time period (and earlier) probably lack the
2149 * tachometer as well.
2151 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2152 * was never fixed by IBM to report the EC firmware version string
2153 * probably support the tachometer (like the early X models), so
2154 * detecting it is quite hard. We need more data to know for sure.
2156 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2159 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2162 * For firmware bugs, refer to:
2163 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2165 * TPACPI_FAN_WR_ACPI_FANS:
2166 * ThinkPad X31, X40, X41. Not available in the X60.
2168 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2169 * high speed. ACPI DSDT seems to map these three speeds to levels
2170 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2171 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2173 * The speeds are stored on handles
2174 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2176 * There are three default speed sets, acessible as handles:
2177 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2179 * ACPI DSDT switches which set is in use depending on various
2182 * TPACPI_FAN_WR_TPEC is also available and should be used to
2183 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2184 * but the ACPI tables just mention level 7.
2187 static enum fan_status_access_mode fan_status_access_mode;
2188 static enum fan_control_access_mode fan_control_access_mode;
2189 static enum fan_control_commands fan_control_commands;
2191 static int fan_control_status_known;
2192 static u8 fan_control_initial_status;
2194 static void fan_watchdog_fire(struct work_struct *ignored);
2195 static int fan_watchdog_maxinterval;
2196 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2198 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2199 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2200 "\\FSPD", /* 600e/x, 770e, 770x */
2202 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2203 "JFNS", /* 770x-JL */
2206 static int __init fan_init(struct ibm_init_struct *iibm)
2208 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2210 fan_status_access_mode = TPACPI_FAN_NONE;
2211 fan_control_access_mode = TPACPI_FAN_WR_NONE;
2212 fan_control_commands = 0;
2213 fan_control_status_known = 1;
2214 fan_watchdog_maxinterval = 0;
2216 IBM_HANDLE_INIT(fans);
2217 IBM_HANDLE_INIT(gfan);
2218 IBM_HANDLE_INIT(sfan);
2221 /* 570, 600e/x, 770e, 770x */
2222 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2224 /* all other ThinkPads: note that even old-style
2225 * ThinkPad ECs supports the fan control register */
2226 if (likely(acpi_ec_read(fan_status_offset,
2227 &fan_control_initial_status))) {
2228 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2230 /* In some ThinkPads, neither the EC nor the ACPI
2231 * DSDT initialize the fan status, and it ends up
2232 * being set to 0x07 when it *could* be either
2235 * Enable for TP-1Y (T43), TP-78 (R51e),
2236 * TP-76 (R52), TP-70 (T43, R52), which are known
2238 if (fan_control_initial_status == 0x07 &&
2239 ibm_thinkpad_ec_found &&
2240 ((ibm_thinkpad_ec_found[0] == '1' &&
2241 ibm_thinkpad_ec_found[1] == 'Y') ||
2242 (ibm_thinkpad_ec_found[0] == '7' &&
2243 (ibm_thinkpad_ec_found[1] == '6' ||
2244 ibm_thinkpad_ec_found[1] == '8' ||
2245 ibm_thinkpad_ec_found[1] == '0'))
2248 "fan_init: initial fan status is "
2249 "unknown, assuming it is in auto "
2251 fan_control_status_known = 0;
2255 "ThinkPad ACPI EC access misbehaving, "
2256 "fan status and control unavailable\n");
2263 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2264 fan_control_commands |=
2265 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2268 /* gfan without sfan means no fan control */
2269 /* all other models implement TP EC 0x2f control */
2273 fan_control_access_mode =
2274 TPACPI_FAN_WR_ACPI_FANS;
2275 fan_control_commands |=
2276 TPACPI_FAN_CMD_SPEED |
2277 TPACPI_FAN_CMD_LEVEL |
2278 TPACPI_FAN_CMD_ENABLE;
2280 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2281 fan_control_commands |=
2282 TPACPI_FAN_CMD_LEVEL |
2283 TPACPI_FAN_CMD_ENABLE;
2288 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2289 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2290 fan_control_access_mode != TPACPI_FAN_WR_NONE),
2291 fan_status_access_mode, fan_control_access_mode);
2293 return (fan_status_access_mode != TPACPI_FAN_NONE ||
2294 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2298 static int fan_get_status(u8 *status)
2303 * Add TPACPI_FAN_RD_ACPI_FANS ? */
2305 switch (fan_status_access_mode) {
2306 case TPACPI_FAN_RD_ACPI_GFAN:
2307 /* 570, 600e/x, 770e, 770x */
2309 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2317 case TPACPI_FAN_RD_TPEC:
2318 /* all except 570, 600e/x, 770e, 770x */
2319 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2334 static void fan_exit(void)
2336 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending watchdogs\n");
2337 cancel_delayed_work(&fan_watchdog_task);
2338 flush_scheduled_work();
2341 static int fan_get_speed(unsigned int *speed)
2345 switch (fan_status_access_mode) {
2346 case TPACPI_FAN_RD_TPEC:
2347 /* all except 570, 600e/x, 770e, 770x */
2348 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2349 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2353 *speed = (hi << 8) | lo;
2364 static void fan_watchdog_fire(struct work_struct *ignored)
2366 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2367 if (fan_set_enable()) {
2368 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2369 /* reschedule for later */
2370 fan_watchdog_reset();
2374 static void fan_watchdog_reset(void)
2376 static int fan_watchdog_active = 0;
2378 if (fan_watchdog_active)
2379 cancel_delayed_work(&fan_watchdog_task);
2381 if (fan_watchdog_maxinterval > 0) {
2382 fan_watchdog_active = 1;
2383 if (!schedule_delayed_work(&fan_watchdog_task,
2384 msecs_to_jiffies(fan_watchdog_maxinterval
2386 printk(IBM_ERR "failed to schedule the fan watchdog, "
2387 "watchdog will not trigger\n");
2390 fan_watchdog_active = 0;
2393 static int fan_set_level(int level)
2395 switch (fan_control_access_mode) {
2396 case TPACPI_FAN_WR_ACPI_SFAN:
2397 if (level >= 0 && level <= 7) {
2398 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2404 case TPACPI_FAN_WR_ACPI_FANS:
2405 case TPACPI_FAN_WR_TPEC:
2406 if ((level != TP_EC_FAN_AUTO) &&
2407 (level != TP_EC_FAN_FULLSPEED) &&
2408 ((level < 0) || (level > 7)))
2411 if (!acpi_ec_write(fan_status_offset, level))
2414 fan_control_status_known = 1;
2423 static int fan_set_enable(void)
2428 switch (fan_control_access_mode) {
2429 case TPACPI_FAN_WR_ACPI_FANS:
2430 case TPACPI_FAN_WR_TPEC:
2431 if ((rc = fan_get_status(&s)) < 0)
2434 /* Don't go out of emergency fan mode */
2438 if (!acpi_ec_write(fan_status_offset, s))
2441 fan_control_status_known = 1;
2444 case TPACPI_FAN_WR_ACPI_SFAN:
2445 if ((rc = fan_get_status(&s)) < 0)
2450 /* Set fan to at least level 4 */
2454 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2464 static int fan_set_disable(void)
2466 switch (fan_control_access_mode) {
2467 case TPACPI_FAN_WR_ACPI_FANS:
2468 case TPACPI_FAN_WR_TPEC:
2469 if (!acpi_ec_write(fan_status_offset, 0x00))
2472 fan_control_status_known = 1;
2475 case TPACPI_FAN_WR_ACPI_SFAN:
2476 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2486 static int fan_set_speed(int speed)
2488 switch (fan_control_access_mode) {
2489 case TPACPI_FAN_WR_ACPI_FANS:
2490 if (speed >= 0 && speed <= 65535) {
2491 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2492 speed, speed, speed))
2504 static int fan_read(char *p)
2509 unsigned int speed = 0;
2511 switch (fan_status_access_mode) {
2512 case TPACPI_FAN_RD_ACPI_GFAN:
2513 /* 570, 600e/x, 770e, 770x */
2514 if ((rc = fan_get_status(&status)) < 0)
2517 len += sprintf(p + len, "status:\t\t%s\n"
2519 (status != 0) ? "enabled" : "disabled", status);
2522 case TPACPI_FAN_RD_TPEC:
2523 /* all except 570, 600e/x, 770e, 770x */
2524 if ((rc = fan_get_status(&status)) < 0)
2527 if (unlikely(!fan_control_status_known)) {
2528 if (status != fan_control_initial_status)
2529 fan_control_status_known = 1;
2531 /* Return most likely status. In fact, it
2532 * might be the only possible status */
2533 status = TP_EC_FAN_AUTO;
2536 len += sprintf(p + len, "status:\t\t%s\n",
2537 (status != 0) ? "enabled" : "disabled");
2539 if ((rc = fan_get_speed(&speed)) < 0)
2542 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2544 if (status & TP_EC_FAN_FULLSPEED)
2545 /* Disengaged mode takes precedence */
2546 len += sprintf(p + len, "level:\t\tdisengaged\n");
2547 else if (status & TP_EC_FAN_AUTO)
2548 len += sprintf(p + len, "level:\t\tauto\n");
2550 len += sprintf(p + len, "level:\t\t%d\n", status);
2553 case TPACPI_FAN_NONE:
2555 len += sprintf(p + len, "status:\t\tnot supported\n");
2558 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2559 len += sprintf(p + len, "commands:\tlevel <level>");
2561 switch (fan_control_access_mode) {
2562 case TPACPI_FAN_WR_ACPI_SFAN:
2563 len += sprintf(p + len, " (<level> is 0-7)\n");
2567 len += sprintf(p + len, " (<level> is 0-7, "
2568 "auto, disengaged)\n");
2573 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2574 len += sprintf(p + len, "commands:\tenable, disable\n"
2575 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2576 "1-120 (seconds))\n");
2578 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2579 len += sprintf(p + len, "commands:\tspeed <speed>"
2580 " (<speed> is 0-65535)\n");
2585 static int fan_write_cmd_level(const char *cmd, int *rc)
2589 if (strlencmp(cmd, "level auto") == 0)
2590 level = TP_EC_FAN_AUTO;
2591 else if (strlencmp(cmd, "level disengaged") == 0)
2592 level = TP_EC_FAN_FULLSPEED;
2593 else if (sscanf(cmd, "level %d", &level) != 1)
2596 if ((*rc = fan_set_level(level)) == -ENXIO)
2597 printk(IBM_ERR "level command accepted for unsupported "
2598 "access mode %d", fan_control_access_mode);
2603 static int fan_write_cmd_enable(const char *cmd, int *rc)
2605 if (strlencmp(cmd, "enable") != 0)
2608 if ((*rc = fan_set_enable()) == -ENXIO)
2609 printk(IBM_ERR "enable command accepted for unsupported "
2610 "access mode %d", fan_control_access_mode);
2615 static int fan_write_cmd_disable(const char *cmd, int *rc)
2617 if (strlencmp(cmd, "disable") != 0)
2620 if ((*rc = fan_set_disable()) == -ENXIO)
2621 printk(IBM_ERR "disable command accepted for unsupported "
2622 "access mode %d", fan_control_access_mode);
2627 static int fan_write_cmd_speed(const char *cmd, int *rc)
2632 * Support speed <low> <medium> <high> ? */
2634 if (sscanf(cmd, "speed %d", &speed) != 1)
2637 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2638 printk(IBM_ERR "speed command accepted for unsupported "
2639 "access mode %d", fan_control_access_mode);
2644 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2648 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2651 if (interval < 0 || interval > 120)
2654 fan_watchdog_maxinterval = interval;
2659 static int fan_write(char *buf)
2664 while (!rc && (cmd = next_cmd(&buf))) {
2665 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2666 fan_write_cmd_level(cmd, &rc)) &&
2667 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2668 (fan_write_cmd_enable(cmd, &rc) ||
2669 fan_write_cmd_disable(cmd, &rc) ||
2670 fan_write_cmd_watchdog(cmd, &rc))) &&
2671 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2672 fan_write_cmd_speed(cmd, &rc))
2676 fan_watchdog_reset();
2682 static struct ibm_struct fan_driver_data = {
2690 /****************************************************************************
2691 ****************************************************************************
2695 ****************************************************************************
2696 ****************************************************************************/
2699 static struct proc_dir_entry *proc_dir = NULL;
2701 /* Subdriver registry */
2702 static LIST_HEAD(tpacpi_all_drivers);
2706 * Module and infrastructure proble, init and exit handling
2709 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
2710 static const char * __init str_supported(int is_supported)
2712 static char text_unsupported[] __initdata = "not supported";
2714 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
2716 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
2718 static int __init ibm_init(struct ibm_init_struct *iibm)
2721 struct ibm_struct *ibm = iibm->data;
2722 struct proc_dir_entry *entry;
2724 BUG_ON(ibm == NULL);
2726 INIT_LIST_HEAD(&ibm->all_drivers);
2728 if (ibm->experimental && !experimental)
2731 dbg_printk(TPACPI_DBG_INIT,
2732 "probing for %s\n", ibm->name);
2735 ret = iibm->init(iibm);
2737 return 0; /* probe failed */
2741 ibm->init_called = 1;
2745 ret = register_tpacpi_subdriver(ibm);
2751 ret = setup_notify(ibm);
2752 if (ret == -ENODEV) {
2753 printk(IBM_NOTICE "disabling subdriver %s\n",
2762 dbg_printk(TPACPI_DBG_INIT,
2763 "%s installed\n", ibm->name);
2766 entry = create_proc_entry(ibm->name,
2767 S_IFREG | S_IRUGO | S_IWUSR,
2770 printk(IBM_ERR "unable to create proc entry %s\n",
2775 entry->owner = THIS_MODULE;
2777 entry->read_proc = &dispatch_read;
2779 entry->write_proc = &dispatch_write;
2780 ibm->proc_created = 1;
2783 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
2788 dbg_printk(TPACPI_DBG_INIT,
2789 "%s: at error exit path with result %d\n",
2793 return (ret < 0)? ret : 0;
2796 static void ibm_exit(struct ibm_struct *ibm)
2798 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
2800 list_del_init(&ibm->all_drivers);
2802 if (ibm->notify_installed) {
2803 dbg_printk(TPACPI_DBG_EXIT,
2804 "%s: acpi_remove_notify_handler\n", ibm->name);
2805 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2807 ibm->notify_installed = 0;
2810 if (ibm->proc_created) {
2811 dbg_printk(TPACPI_DBG_EXIT,
2812 "%s: remove_proc_entry\n", ibm->name);
2813 remove_proc_entry(ibm->name, proc_dir);
2814 ibm->proc_created = 0;
2817 if (ibm->driver_registered) {
2818 dbg_printk(TPACPI_DBG_EXIT,
2819 "%s: acpi_bus_unregister_driver\n", ibm->name);
2820 acpi_bus_unregister_driver(ibm->driver);
2823 ibm->driver_registered = 0;
2826 if (ibm->init_called && ibm->exit) {
2828 ibm->init_called = 0;
2831 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
2836 static char *ibm_thinkpad_ec_found = NULL;
2838 static char* __init check_dmi_for_ec(void)
2840 struct dmi_device *dev = NULL;
2841 char ec_fw_string[18];
2844 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2845 * X32 or newer, all Z series; Some models must have an
2846 * up-to-date BIOS or they will not be detected.
2848 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2850 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2851 if (sscanf(dev->name,
2852 "IBM ThinkPad Embedded Controller -[%17c",
2853 ec_fw_string) == 1) {
2854 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2855 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2856 return kstrdup(ec_fw_string, GFP_KERNEL);
2862 static int __init probe_for_thinkpad(void)
2870 * Non-ancient models have better DMI tagging, but very old models
2873 is_thinkpad = dmi_name_in_vendors("ThinkPad");
2875 /* ec is required because many other handles are relative to it */
2876 IBM_HANDLE_INIT(ec);
2880 "Not yet supported ThinkPad detected!\n");
2888 /* Module init, exit, parameters */
2890 static struct ibm_init_struct ibms_init[] __initdata = {
2892 .init = thinkpad_acpi_driver_init,
2893 .data = &thinkpad_acpi_driver_data,
2896 .init = hotkey_init,
2897 .data = &hotkey_driver_data,
2900 .init = bluetooth_init,
2901 .data = &bluetooth_driver_data,
2905 .data = &wan_driver_data,
2909 .data = &video_driver_data,
2913 .data = &light_driver_data,
2915 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2918 .data = &dock_driver_data[0],
2921 .data = &dock_driver_data[1],
2924 #ifdef CONFIG_THINKPAD_ACPI_BAY
2927 .data = &bay_driver_data,
2932 .data = &cmos_driver_data,
2936 .data = &led_driver_data,
2940 .data = &beep_driver_data,
2943 .init = thermal_init,
2944 .data = &thermal_driver_data,
2947 .data = &ecdump_driver_data,
2950 .init = brightness_init,
2951 .data = &brightness_driver_data,
2954 .data = &volume_driver_data,
2958 .data = &fan_driver_data,
2962 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2965 struct ibm_struct *ibm;
2967 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
2968 ibm = ibms_init[i].data;
2969 BUG_ON(ibm == NULL);
2971 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
2972 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
2974 strcpy(ibms_init[i].param, val);
2975 strcat(ibms_init[i].param, ",");
2983 static int experimental;
2984 module_param(experimental, int, 0);
2986 static u32 dbg_level;
2987 module_param_named(debug, dbg_level, uint, 0);
2989 #define IBM_PARAM(feature) \
2990 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2993 IBM_PARAM(bluetooth);
2996 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2999 #ifdef CONFIG_THINKPAD_ACPI_BAY
3001 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3006 IBM_PARAM(brightness);
3010 static int __init thinkpad_acpi_module_init(void)
3014 ret = probe_for_thinkpad();
3018 ibm_thinkpad_ec_found = check_dmi_for_ec();
3019 IBM_HANDLE_INIT(ecrd);
3020 IBM_HANDLE_INIT(ecwr);
3022 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
3024 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
3025 thinkpad_acpi_module_exit();
3028 proc_dir->owner = THIS_MODULE;
3030 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3031 ret = ibm_init(&ibms_init[i]);
3032 if (ret >= 0 && *ibms_init[i].param)
3033 ret = ibms_init[i].data->write(ibms_init[i].param);
3035 thinkpad_acpi_module_exit();
3043 static void thinkpad_acpi_module_exit(void)
3045 struct ibm_struct *ibm, *itmp;
3047 list_for_each_entry_safe_reverse(ibm, itmp,
3048 &tpacpi_all_drivers,
3053 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3056 remove_proc_entry(IBM_DIR, acpi_root_dir);
3058 if (ibm_thinkpad_ec_found)
3059 kfree(ibm_thinkpad_ec_found);
3062 module_init(thinkpad_acpi_module_init);
3063 module_exit(thinkpad_acpi_module_exit);