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linux/drivers/acpi/ibm_acpi.c
Henrique de Moraes Holschuh 3945ac36af ACPI: ibm-acpi: cleanup init and exit paths 
Fix a small memory leak on module removal, and other
assorted minor cleanups on the module init codepath.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-09 15:39:47 -05:00

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/*
* ibm_acpi.c - IBM ThinkPad ACPI Extras
*
*
* Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
* Copyright (C) 2006 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
*
* 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
*/
#define IBM_VERSION "0.13"
/*
* Changelog:
*
* 2006-11-22 0.13 new maintainer
* changelog now lives in git commit history, and will
* not be updated further in-file.
*
* 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
* 2005-03-17 0.11 support for 600e, 770x
* thanks to Jamie Lentin <lentinj@dial.pipex.com>
* support for 770e, G41
* G40 and G41 don't have a thinklight
* temperatures no longer experimental
* experimental brightness control
* experimental volume control
* experimental fan enable/disable
* 2005-01-16 0.10 fix module loading on R30, R31
* 2005-01-16 0.9 support for 570, R30, R31
* ultrabay support on A22p, A3x
* limit arg for cmos, led, beep, drop experimental status
* more capable led control on A21e, A22p, T20-22, X20
* experimental temperatures and fan speed
* experimental embedded controller register dump
* mark more functions as __init, drop incorrect __exit
* use MODULE_VERSION
* thanks to Henrik Brix Andersen <brix@gentoo.org>
* fix parameter passing on module loading
* thanks to Rusty Russell <rusty@rustcorp.com.au>
* thanks to Jim Radford <radford@blackbean.org>
* 2004-11-08 0.8 fix init error case, don't return from a macro
* thanks to Chris Wright <chrisw@osdl.org>
* 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
* fix led control on A21e
* 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
* 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
* 2004-09-16 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
* 2004-08-17 0.3 support for R40
* lcd off, brightness control
* thinklight on/off
* 2004-08-14 0.2 support for T series, X20
* bluetooth enable/disable
* hotkey events disabled by default
* removed fan control, currently useless
* 2004-08-09 0.1 initial release, support for X series
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/backlight.h>
#include <asm/uaccess.h>
#include <linux/dmi.h>
#include <linux/jiffies.h>
#include <linux/workqueue.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/"
MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
MODULE_DESCRIPTION(IBM_DESC);
MODULE_VERSION(IBM_VERSION);
MODULE_LICENSE("GPL");
#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##_path; \
static char *object##_paths[] = { paths }
IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
"\\_SB.PCI.ISA.EC", /* 570 */
"\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
"\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
"\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
"\\_SB.PCI0.ICH3.EC0", /* R31 */
"\\_SB.PCI0.LPC.EC", /* all others */
);
IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
"\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
"\\_SB.PCI0.VID0", /* 770e */
"\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
"\\_SB.PCI0.AGP.VID", /* all others */
); /* R30, R31 */
IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
"\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
"\\CMS", /* R40, R40e */
); /* all others */
#ifdef CONFIG_ACPI_IBM_DOCK
IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
"\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
"\\_SB.PCI0.PCI1.DOCK", /* all others */
"\\_SB.PCI.ISA.SLCE", /* 570 */
); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
#endif
IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
"\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
"\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
"\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
); /* A21e, R30, R31 */
IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
"_EJ0", /* all others */
); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
"\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
); /* all others */
IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
"_EJ0", /* 770x */
); /* all others */
/* don't list other alternatives as we install a notify handler on the 570 */
IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
"^HKEY", /* R30, R31 */
"HKEY", /* all others */
); /* 570 */
IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
IBM_HANDLE(led, ec, "SLED", /* 570 */
"SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
"LED", /* all others */
); /* R30, R31 */
IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
"\\FSPD", /* 600e/x, 770e, 770x */
); /* all others */
IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
"JFNS", /* 770x-JL */
); /* all others */
#define IBM_HKEY_HID "IBM0068"
#define IBM_PCI_HID "PNP0A03"
enum thermal_access_mode {
IBMACPI_THERMAL_NONE = 0, /* No thermal support */
IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
};
#define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
struct ibm_thermal_sensors_struct {
s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
};
/*
* FAN ACCESS MODES
*
* IBMACPI_FAN_RD_ACPI_GFAN:
* ACPI GFAN method: returns fan level
*
* see IBMACPI_FAN_WR_ACPI_SFAN
* EC 0x2f not available if GFAN exists
*
* IBMACPI_FAN_WR_ACPI_SFAN:
* ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
*
* EC 0x2f might be available *for reading*, but never for writing.
*
* IBMACPI_FAN_WR_TPEC:
* ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
* on almost all ThinkPads
*
* Fan speed changes of any sort (including those caused by the
* disengaged mode) are usually done slowly by the firmware as the
* maximum ammount of fan duty cycle change per second seems to be
* limited.
*
* Reading is not available if GFAN exists.
* Writing is not available if SFAN exists.
*
* Bits
* 7 automatic mode engaged;
* (default operation mode of the ThinkPad)
* fan level is ignored in this mode.
* 6 disengage mode (takes precedence over bit 7);
* not available on all thinkpads. May disable
* the tachometer, and speeds up fan to 100% duty-cycle,
* which speeds it up far above the standard RPM
* levels. It is not impossible that it could cause
* hardware damage.
* 5-3 unused in some models. Extra bits for fan level
* in others, but still useless as all values above
* 7 map to the same speed as level 7 in these models.
* 2-0 fan level (0..7 usually)
* 0x00 = stop
* 0x07 = max (set when temperatures critical)
* Some ThinkPads may have other levels, see
* IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
*
* FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
* boot. Apparently the EC does not intialize it, so unless ACPI DSDT
* does so, its initial value is meaningless (0x07).
*
* For firmware bugs, refer to:
* http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
*
* ----
*
* ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
* Main fan tachometer reading (in RPM)
*
* This register is present on all ThinkPads with a new-style EC, and
* it is known not to be present on the A21m/e, and T22, as there is
* something else in offset 0x84 according to the ACPI DSDT. Other
* ThinkPads from this same time period (and earlier) probably lack the
* tachometer as well.
*
* Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
* was never fixed by IBM to report the EC firmware version string
* probably support the tachometer (like the early X models), so
* detecting it is quite hard. We need more data to know for sure.
*
* FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
* might result.
*
* FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
* register is not invalidated in ThinkPads that disable tachometer
* readings. Thus, the tachometer readings go stale.
*
* For firmware bugs, refer to:
* http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
*
* IBMACPI_FAN_WR_ACPI_FANS:
* ThinkPad X31, X40, X41. Not available in the X60.
*
* FANS ACPI handle: takes three arguments: low speed, medium speed,
* high speed. ACPI DSDT seems to map these three speeds to levels
* as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
* (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
*
* The speeds are stored on handles
* (FANA:FAN9), (FANC:FANB), (FANE:FAND).
*
* There are three default speed sets, acessible as handles:
* FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
*
* ACPI DSDT switches which set is in use depending on various
* factors.
*
* IBMACPI_FAN_WR_TPEC is also available and should be used to
* command the fan. The X31/X40/X41 seems to have 8 fan levels,
* but the ACPI tables just mention level 7.
*/
enum fan_status_access_mode {
IBMACPI_FAN_NONE = 0, /* No fan status or control */
IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
};
enum fan_control_access_mode {
IBMACPI_FAN_WR_NONE = 0, /* No fan control */
IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
};
enum fan_control_commands {
IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
* and also watchdog cmd */
};
enum { /* Fan control constants */
fan_status_offset = 0x2f, /* EC register 0x2f */
fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
* 0x84 must be read before 0x85 */
IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
* disengaged */
IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
* control */
};
static char *ibm_thinkpad_ec_found = NULL;
struct ibm_struct {
char *name;
char param[32];
char *hid;
struct acpi_driver *driver;
int (*init) (void);
int (*read) (char *);
int (*write) (char *);
void (*exit) (void);
void (*notify) (struct ibm_struct *, u32);
acpi_handle *handle;
int type;
struct acpi_device *device;
int driver_registered;
int proc_created;
int init_called;
int notify_installed;
int experimental;
};
static struct proc_dir_entry *proc_dir = NULL;
static struct backlight_device *ibm_backlight_device = NULL;
#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
#define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
#define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
static int acpi_evalf(acpi_handle handle,
void *res, char *method, char *fmt, ...)
{
char *fmt0 = fmt;
struct acpi_object_list params;
union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
struct acpi_buffer result, *resultp;
union acpi_object out_obj;
acpi_status status;
va_list ap;
char res_type;
int success;
int quiet;
if (!*fmt) {
printk(IBM_ERR "acpi_evalf() called with empty format\n");
return 0;
}
if (*fmt == 'q') {
quiet = 1;
fmt++;
} else
quiet = 0;
res_type = *(fmt++);
params.count = 0;
params.pointer = &in_objs[0];
va_start(ap, fmt);
while (*fmt) {
char c = *(fmt++);
switch (c) {
case 'd': /* int */
in_objs[params.count].integer.value = va_arg(ap, int);
in_objs[params.count++].type = ACPI_TYPE_INTEGER;
break;
/* add more types as needed */
default:
printk(IBM_ERR "acpi_evalf() called "
"with invalid format character '%c'\n", c);
return 0;
}
}
va_end(ap);
if (res_type != 'v') {
result.length = sizeof(out_obj);
result.pointer = &out_obj;
resultp = &result;
} else
resultp = NULL;
status = acpi_evaluate_object(handle, method, &params, resultp);
switch (res_type) {
case 'd': /* int */
if (res)
*(int *)res = out_obj.integer.value;
success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
break;
case 'v': /* void */
success = status == AE_OK;
break;
/* add more types as needed */
default:
printk(IBM_ERR "acpi_evalf() called "
"with invalid format character '%c'\n", res_type);
return 0;
}
if (!success && !quiet)
printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
method, fmt0, status);
return success;
}
static void __unused acpi_print_int(acpi_handle handle, char *method)
{
int i;
if (acpi_evalf(handle, &i, method, "d"))
printk(IBM_INFO "%s = 0x%x\n", method, i);
else
printk(IBM_ERR "error calling %s\n", method);
}
static char *next_cmd(char **cmds)
{
char *start = *cmds;
char *end;
while ((end = strchr(start, ',')) && end == start)
start = end + 1;
if (!end)
return NULL;
*end = 0;
*cmds = end + 1;
return start;
}
static int ibm_acpi_driver_init(void)
{
printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
printk(IBM_INFO "%s\n", IBM_URL);
if (ibm_thinkpad_ec_found)
printk(IBM_INFO "ThinkPad EC firmware %s\n",
ibm_thinkpad_ec_found);
return 0;
}
static int driver_read(char *p)
{
int len = 0;
len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
return len;
}
static int hotkey_supported;
static int hotkey_mask_supported;
static int hotkey_orig_status;
static int hotkey_orig_mask;
static int hotkey_get(int *status, int *mask)
{
if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
return 0;
if (hotkey_mask_supported)
if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
return 0;
return 1;
}
static int hotkey_set(int status, int mask)
{
int i;
if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
return 0;
if (hotkey_mask_supported)
for (i = 0; i < 32; i++) {
int bit = ((1 << i) & mask) != 0;
if (!acpi_evalf(hkey_handle,
NULL, "MHKM", "vdd", i + 1, bit))
return 0;
}
return 1;
}
static int hotkey_init(void)
{
/* hotkey not supported on 570 */
hotkey_supported = hkey_handle != NULL;
if (hotkey_supported) {
/* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
A30, R30, R31, T20-22, X20-21, X22-24 */
hotkey_mask_supported =
acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
return -ENODEV;
}
return 0;
}
static int hotkey_read(char *p)
{
int status, mask;
int len = 0;
if (!hotkey_supported) {
len += sprintf(p + len, "status:\t\tnot supported\n");
return len;
}
if (!hotkey_get(&status, &mask))
return -EIO;
len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
if (hotkey_mask_supported) {
len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
len += sprintf(p + len,
"commands:\tenable, disable, reset, <mask>\n");
} else {
len += sprintf(p + len, "mask:\t\tnot supported\n");
len += sprintf(p + len, "commands:\tenable, disable, reset\n");
}
return len;
}
static int hotkey_write(char *buf)
{
int status, mask;
char *cmd;
int do_cmd = 0;
if (!hotkey_supported)
return -ENODEV;
if (!hotkey_get(&status, &mask))
return -EIO;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
status = 1;
} else if (strlencmp(cmd, "disable") == 0) {
status = 0;
} else if (strlencmp(cmd, "reset") == 0) {
status = hotkey_orig_status;
mask = hotkey_orig_mask;
} else if (sscanf(cmd, "0x%x", &mask) == 1) {
/* mask set */
} else if (sscanf(cmd, "%x", &mask) == 1) {
/* mask set */
} else
return -EINVAL;
do_cmd = 1;
}
if (do_cmd && !hotkey_set(status, mask))
return -EIO;
return 0;
}
static void hotkey_exit(void)
{
if (hotkey_supported)
hotkey_set(hotkey_orig_status, hotkey_orig_mask);
}
static void hotkey_notify(struct ibm_struct *ibm, u32 event)
{
int hkey;
if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
acpi_bus_generate_event(ibm->device, event, hkey);
else {
printk(IBM_ERR "unknown hotkey event %d\n", event);
acpi_bus_generate_event(ibm->device, event, 0);
}
}
static int bluetooth_supported;
static int bluetooth_init(void)
{
/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
bluetooth_supported = hkey_handle &&
acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
return 0;
}
static int bluetooth_status(void)
{
int status;
if (!bluetooth_supported ||
!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
status = 0;
return status;
}
static int bluetooth_read(char *p)
{
int len = 0;
int status = bluetooth_status();
if (!bluetooth_supported)
len += sprintf(p + len, "status:\t\tnot supported\n");
else if (!(status & 1))
len += sprintf(p + len, "status:\t\tnot installed\n");
else {
len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
len += sprintf(p + len, "commands:\tenable, disable\n");
}
return len;
}
static int bluetooth_write(char *buf)
{
int status = bluetooth_status();
char *cmd;
int do_cmd = 0;
if (!bluetooth_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
status |= 2;
} else if (strlencmp(cmd, "disable") == 0) {
status &= ~2;
} else
return -EINVAL;
do_cmd = 1;
}
if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
return -EIO;
return 0;
}
static int wan_supported;
static int wan_init(void)
{
wan_supported = hkey_handle &&
acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
return 0;
}
static int wan_status(void)
{
int status;
if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
status = 0;
return status;
}
static int wan_read(char *p)
{
int len = 0;
int status = wan_status();
if (!wan_supported)
len += sprintf(p + len, "status:\t\tnot supported\n");
else if (!(status & 1))
len += sprintf(p + len, "status:\t\tnot installed\n");
else {
len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
len += sprintf(p + len, "commands:\tenable, disable\n");
}
return len;
}
static int wan_write(char *buf)
{
int status = wan_status();
char *cmd;
int do_cmd = 0;
if (!wan_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
status |= 2;
} else if (strlencmp(cmd, "disable") == 0) {
status &= ~2;
} else
return -EINVAL;
do_cmd = 1;
}
if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
return -EIO;
return 0;
}
enum video_access_mode {
IBMACPI_VIDEO_NONE = 0,
IBMACPI_VIDEO_570, /* 570 */
IBMACPI_VIDEO_770, /* 600e/x, 770e, 770x */
IBMACPI_VIDEO_NEW, /* all others */
};
static enum video_access_mode video_supported;
static int video_orig_autosw;
static int video_init(void)
{
int ivga;
if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
/* G41, assume IVGA doesn't change */
vid_handle = vid2_handle;
if (!vid_handle)
/* video switching not supported on R30, R31 */
video_supported = IBMACPI_VIDEO_NONE;
else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
/* 570 */
video_supported = IBMACPI_VIDEO_570;
else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
/* 600e/x, 770e, 770x */
video_supported = IBMACPI_VIDEO_770;
else
/* all others */
video_supported = IBMACPI_VIDEO_NEW;
return 0;
}
static int video_status(void)
{
int status = 0;
int i;
if (video_supported == IBMACPI_VIDEO_570) {
if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
status = i & 3;
} else if (video_supported == IBMACPI_VIDEO_770) {
if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
status |= 0x01 * i;
if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
status |= 0x02 * i;
} else if (video_supported == IBMACPI_VIDEO_NEW) {
acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
status |= 0x02 * i;
acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
status |= 0x01 * i;
if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
status |= 0x08 * i;
}
return status;
}
static int video_autosw(void)
{
int autosw = 0;
if (video_supported == IBMACPI_VIDEO_570)
acpi_evalf(vid_handle, &autosw, "SWIT", "d");
else if (video_supported == IBMACPI_VIDEO_770 ||
video_supported == IBMACPI_VIDEO_NEW)
acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
return autosw & 1;
}
static int video_read(char *p)
{
int status = video_status();
int autosw = video_autosw();
int len = 0;
if (!video_supported) {
len += sprintf(p + len, "status:\t\tnot supported\n");
return len;
}
len += sprintf(p + len, "status:\t\tsupported\n");
len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
if (video_supported == IBMACPI_VIDEO_NEW)
len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
if (video_supported == IBMACPI_VIDEO_NEW)
len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
return len;
}
static int video_switch(void)
{
int autosw = video_autosw();
int ret;
if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
return -EIO;
ret = video_supported == IBMACPI_VIDEO_570 ?
acpi_evalf(ec_handle, NULL, "_Q16", "v") :
acpi_evalf(vid_handle, NULL, "VSWT", "v");
acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
return ret;
}
static int video_expand(void)
{
if (video_supported == IBMACPI_VIDEO_570)
return acpi_evalf(ec_handle, NULL, "_Q17", "v");
else if (video_supported == IBMACPI_VIDEO_770)
return acpi_evalf(vid_handle, NULL, "VEXP", "v");
else
return acpi_evalf(NULL, NULL, "\\VEXP", "v");
}
static int video_switch2(int status)
{
int ret;
if (video_supported == IBMACPI_VIDEO_570) {
ret = acpi_evalf(NULL, NULL,
"\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
} else if (video_supported == IBMACPI_VIDEO_770) {
int autosw = video_autosw();
if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
return -EIO;
ret = acpi_evalf(vid_handle, NULL,
"ASWT", "vdd", status * 0x100, 0);
acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
} else {
ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
}
return ret;
}
static int video_write(char *buf)
{
char *cmd;
int enable, disable, status;
if (!video_supported)
return -ENODEV;
enable = disable = 0;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "lcd_enable") == 0) {
enable |= 0x01;
} else if (strlencmp(cmd, "lcd_disable") == 0) {
disable |= 0x01;
} else if (strlencmp(cmd, "crt_enable") == 0) {
enable |= 0x02;
} else if (strlencmp(cmd, "crt_disable") == 0) {
disable |= 0x02;
} else if (video_supported == IBMACPI_VIDEO_NEW &&
strlencmp(cmd, "dvi_enable") == 0) {
enable |= 0x08;
} else if (video_supported == IBMACPI_VIDEO_NEW &&
strlencmp(cmd, "dvi_disable") == 0) {
disable |= 0x08;
} else if (strlencmp(cmd, "auto_enable") == 0) {
if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
return -EIO;
} else if (strlencmp(cmd, "auto_disable") == 0) {
if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
return -EIO;
} else if (strlencmp(cmd, "video_switch") == 0) {
if (!video_switch())
return -EIO;
} else if (strlencmp(cmd, "expand_toggle") == 0) {
if (!video_expand())
return -EIO;
} else
return -EINVAL;
}
if (enable || disable) {
status = (video_status() & 0x0f & ~disable) | enable;
if (!video_switch2(status))
return -EIO;
}
return 0;
}
static void video_exit(void)
{
acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
}
static int light_supported;
static int light_status_supported;
static int light_init(void)
{
/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
light_supported = (cmos_handle || lght_handle) && !ledb_handle;
if (light_supported)
/* light status not supported on
570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
light_status_supported = acpi_evalf(ec_handle, NULL,
"KBLT", "qv");
return 0;
}
static int light_read(char *p)
{
int len = 0;
int status = 0;
if (!light_supported) {
len += sprintf(p + len, "status:\t\tnot supported\n");
} else if (!light_status_supported) {
len += sprintf(p + len, "status:\t\tunknown\n");
len += sprintf(p + len, "commands:\ton, off\n");
} else {
if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
return -EIO;
len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
len += sprintf(p + len, "commands:\ton, off\n");
}
return len;
}
static int light_write(char *buf)
{
int cmos_cmd, lght_cmd;
char *cmd;
int success;
if (!light_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "on") == 0) {
cmos_cmd = 0x0c;
lght_cmd = 1;
} else if (strlencmp(cmd, "off") == 0) {
cmos_cmd = 0x0d;
lght_cmd = 0;
} else
return -EINVAL;
success = cmos_handle ?
acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
if (!success)
return -EIO;
}
return 0;
}
static int _sta(acpi_handle handle)
{
int status;
if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
status = 0;
return status;
}
#ifdef CONFIG_ACPI_IBM_DOCK
#define dock_docked() (_sta(dock_handle) & 1)
static int dock_read(char *p)
{
int len = 0;
int docked = dock_docked();
if (!dock_handle)
len += sprintf(p + len, "status:\t\tnot supported\n");
else if (!docked)
len += sprintf(p + len, "status:\t\tundocked\n");
else {
len += sprintf(p + len, "status:\t\tdocked\n");
len += sprintf(p + len, "commands:\tdock, undock\n");
}
return len;
}
static int dock_write(char *buf)
{
char *cmd;
if (!dock_docked())
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "undock") == 0) {
if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
!acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
return -EIO;
} else if (strlencmp(cmd, "dock") == 0) {
if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
return -EIO;
} else
return -EINVAL;
}
return 0;
}
static void dock_notify(struct ibm_struct *ibm, u32 event)
{
int docked = dock_docked();
int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
if (event == 1 && !pci) /* 570 */
acpi_bus_generate_event(ibm->device, event, 1); /* button */
else if (event == 1 && pci) /* 570 */
acpi_bus_generate_event(ibm->device, event, 3); /* dock */
else if (event == 3 && docked)
acpi_bus_generate_event(ibm->device, event, 1); /* button */
else if (event == 3 && !docked)
acpi_bus_generate_event(ibm->device, event, 2); /* undock */
else if (event == 0 && docked)
acpi_bus_generate_event(ibm->device, event, 3); /* dock */
else {
printk(IBM_ERR "unknown dock event %d, status %d\n",
event, _sta(dock_handle));
acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
}
}
#endif
static int bay_status_supported;
static int bay_status2_supported;
static int bay_eject_supported;
static int bay_eject2_supported;
static int bay_init(void)
{
bay_status_supported = bay_handle &&
acpi_evalf(bay_handle, NULL, "_STA", "qv");
bay_status2_supported = bay2_handle &&
acpi_evalf(bay2_handle, NULL, "_STA", "qv");
bay_eject_supported = bay_handle && bay_ej_handle &&
(strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
bay_eject2_supported = bay2_handle && bay2_ej_handle &&
(strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
return 0;
}
#define bay_occupied(b) (_sta(b##_handle) & 1)
static int bay_read(char *p)
{
int len = 0;
int occupied = bay_occupied(bay);
int occupied2 = bay_occupied(bay2);
int eject, eject2;
len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
(occupied ? "occupied" : "unoccupied") :
"not supported");
if (bay_status2_supported)
len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
"occupied" : "unoccupied");
eject = bay_eject_supported && occupied;
eject2 = bay_eject2_supported && occupied2;
if (eject && eject2)
len += sprintf(p + len, "commands:\teject, eject2\n");
else if (eject)
len += sprintf(p + len, "commands:\teject\n");
else if (eject2)
len += sprintf(p + len, "commands:\teject2\n");
return len;
}
static int bay_write(char *buf)
{
char *cmd;
if (!bay_eject_supported && !bay_eject2_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
return -EIO;
} else if (bay_eject2_supported &&
strlencmp(cmd, "eject2") == 0) {
if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
return -EIO;
} else
return -EINVAL;
}
return 0;
}
static void bay_notify(struct ibm_struct *ibm, u32 event)
{
acpi_bus_generate_event(ibm->device, event, 0);
}
static int cmos_read(char *p)
{
int len = 0;
/* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
R30, R31, T20-22, X20-21 */
if (!cmos_handle)
len += sprintf(p + len, "status:\t\tnot supported\n");
else {
len += sprintf(p + len, "status:\t\tsupported\n");
len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
}
return len;
}
static int cmos_eval(int cmos_cmd)
{
if (cmos_handle)
return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
else
return 1;
}
static int cmos_write(char *buf)
{
char *cmd;
int cmos_cmd;
if (!cmos_handle)
return -EINVAL;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
cmos_cmd >= 0 && cmos_cmd <= 21) {
/* cmos_cmd set */
} else
return -EINVAL;
if (!cmos_eval(cmos_cmd))
return -EIO;
}
return 0;
}
enum led_access_mode {
IBMACPI_LED_NONE = 0,
IBMACPI_LED_570, /* 570 */
IBMACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
IBMACPI_LED_NEW, /* all others */
};
static enum led_access_mode led_supported;
static int led_init(void)
{
if (!led_handle)
/* led not supported on R30, R31 */
led_supported = IBMACPI_LED_NONE;
else if (strlencmp(led_path, "SLED") == 0)
/* 570 */
led_supported = IBMACPI_LED_570;
else if (strlencmp(led_path, "SYSL") == 0)
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
led_supported = IBMACPI_LED_OLD;
else
/* all others */
led_supported = IBMACPI_LED_NEW;
return 0;
}
#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
static int led_read(char *p)
{
int len = 0;
if (!led_supported) {
len += sprintf(p + len, "status:\t\tnot supported\n");
return len;
}
len += sprintf(p + len, "status:\t\tsupported\n");
if (led_supported == IBMACPI_LED_570) {
/* 570 */
int i, status;
for (i = 0; i < 8; i++) {
if (!acpi_evalf(ec_handle,
&status, "GLED", "dd", 1 << i))
return -EIO;
len += sprintf(p + len, "%d:\t\t%s\n",
i, led_status(status));
}
}
len += sprintf(p + len, "commands:\t"
"<led> on, <led> off, <led> blink (<led> is 0-7)\n");
return len;
}
/* off, on, blink */
static const int led_sled_arg1[] = { 0, 1, 3 };
static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
#define EC_HLCL 0x0c
#define EC_HLBL 0x0d
#define EC_HLMS 0x0e
static int led_write(char *buf)
{
char *cmd;
int led, ind, ret;
if (!led_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
return -EINVAL;
if (strstr(cmd, "off")) {
ind = 0;
} else if (strstr(cmd, "on")) {
ind = 1;
} else if (strstr(cmd, "blink")) {
ind = 2;
} else
return -EINVAL;
if (led_supported == IBMACPI_LED_570) {
/* 570 */
led = 1 << led;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_sled_arg1[ind]))
return -EIO;
} else if (led_supported == IBMACPI_LED_OLD) {
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
led = 1 << led;
ret = ec_write(EC_HLMS, led);
if (ret >= 0)
ret =
ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
if (ret >= 0)
ret =
ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
if (ret < 0)
return ret;
} else {
/* all others */
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_led_arg1[ind]))
return -EIO;
}
}
return 0;
}
static int beep_read(char *p)
{
int len = 0;
if (!beep_handle)
len += sprintf(p + len, "status:\t\tnot supported\n");
else {
len += sprintf(p + len, "status:\t\tsupported\n");
len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
}
return len;
}
static int beep_write(char *buf)
{
char *cmd;
int beep_cmd;
if (!beep_handle)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
beep_cmd >= 0 && beep_cmd <= 17) {
/* beep_cmd set */
} else
return -EINVAL;
if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
return -EIO;
}
return 0;
}
static int acpi_ec_read(int i, u8 * p)
{
int v;
if (ecrd_handle) {
if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
return 0;
*p = v;
} else {
if (ec_read(i, p) < 0)
return 0;
}
return 1;
}
static int acpi_ec_write(int i, u8 v)
{
if (ecwr_handle) {
if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
return 0;
} else {
if (ec_write(i, v) < 0)
return 0;
}
return 1;
}
static enum thermal_access_mode thermal_read_mode;
static int thermal_init(void)
{
u8 t, ta1, ta2;
int i;
int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
if (ibm_thinkpad_ec_found && experimental) {
/*
* Direct EC access mode: sensors at registers
* 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
* non-implemented, thermal sensors return 0x80 when
* not available
*/
ta1 = ta2 = 0;
for (i = 0; i < 8; i++) {
if (likely(acpi_ec_read(0x78 + i, &t))) {
ta1 |= t;
} else {
ta1 = 0;
break;
}
if (likely(acpi_ec_read(0xC0 + i, &t))) {
ta2 |= t;
} else {
ta1 = 0;
break;
}
}
if (ta1 == 0) {
/* This is sheer paranoia, but we handle it anyway */
if (acpi_tmp7) {
printk(IBM_ERR
"ThinkPad ACPI EC access misbehaving, "
"falling back to ACPI TMPx access mode\n");
thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
} else {
printk(IBM_ERR
"ThinkPad ACPI EC access misbehaving, "
"disabling thermal sensors access\n");
thermal_read_mode = IBMACPI_THERMAL_NONE;
}
} else {
thermal_read_mode =
(ta2 != 0) ?
IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
}
} else if (acpi_tmp7) {
if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
/* 600e/x, 770e, 770x */
thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
} else {
/* Standard ACPI TMPx access, max 8 sensors */
thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
}
} else {
/* temperatures not supported on 570, G4x, R30, R31, R32 */
thermal_read_mode = IBMACPI_THERMAL_NONE;
}
return 0;
}
static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
{
int i, t;
s8 tmp;
char tmpi[] = "TMPi";
if (!s)
return -EINVAL;
switch (thermal_read_mode) {
#if IBMACPI_MAX_THERMAL_SENSORS >= 16
case IBMACPI_THERMAL_TPEC_16:
for (i = 0; i < 8; i++) {
if (!acpi_ec_read(0xC0 + i, &tmp))
return -EIO;
s->temp[i + 8] = tmp * 1000;
}
/* fallthrough */
#endif
case IBMACPI_THERMAL_TPEC_8:
for (i = 0; i < 8; i++) {
if (!acpi_ec_read(0x78 + i, &tmp))
return -EIO;
s->temp[i] = tmp * 1000;
}
return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
case IBMACPI_THERMAL_ACPI_UPDT:
if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
return -EIO;
for (i = 0; i < 8; i++) {
tmpi[3] = '0' + i;
if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
return -EIO;
s->temp[i] = (t - 2732) * 100;
}
return 8;
case IBMACPI_THERMAL_ACPI_TMP07:
for (i = 0; i < 8; i++) {
tmpi[3] = '0' + i;
if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
return -EIO;
s->temp[i] = t * 1000;
}
return 8;
case IBMACPI_THERMAL_NONE:
default:
return 0;
}
}
static int thermal_read(char *p)
{
int len = 0;
int n, i;
struct ibm_thermal_sensors_struct t;
n = thermal_get_sensors(&t);
if (unlikely(n < 0))
return n;
len += sprintf(p + len, "temperatures:\t");
if (n > 0) {
for (i = 0; i < (n - 1); i++)
len += sprintf(p + len, "%d ", t.temp[i] / 1000);
len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
} else
len += sprintf(p + len, "not supported\n");
return len;
}
static u8 ecdump_regs[256];
static int ecdump_read(char *p)
{
int len = 0;
int i, j;
u8 v;
len += sprintf(p + len, "EC "
" +00 +01 +02 +03 +04 +05 +06 +07"
" +08 +09 +0a +0b +0c +0d +0e +0f\n");
for (i = 0; i < 256; i += 16) {
len += sprintf(p + len, "EC 0x%02x:", i);
for (j = 0; j < 16; j++) {
if (!acpi_ec_read(i + j, &v))
break;
if (v != ecdump_regs[i + j])
len += sprintf(p + len, " *%02x", v);
else
len += sprintf(p + len, " %02x", v);
ecdump_regs[i + j] = v;
}
len += sprintf(p + len, "\n");
if (j != 16)
break;
}
/* These are way too dangerous to advertise openly... */
#if 0
len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
" (<offset> is 00-ff, <value> is 00-ff)\n");
len += sprintf(p + len, "commands:\t0x<offset> <value> "
" (<offset> is 00-ff, <value> is 0-255)\n");
#endif
return len;
}
static int ecdump_write(char *buf)
{
char *cmd;
int i, v;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
/* i and v set */
} else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
/* i and v set */
} else
return -EINVAL;
if (i >= 0 && i < 256 && v >= 0 && v < 256) {
if (!acpi_ec_write(i, v))
return -EIO;
} else
return -EINVAL;
}
return 0;
}
static int brightness_offset = 0x31;
static int brightness_get(struct backlight_device *bd)
{
u8 level;
if (!acpi_ec_read(brightness_offset, &level))
return -EIO;
level &= 0x7;
return level;
}
static int brightness_read(char *p)
{
int len = 0;
int level;
if ((level = brightness_get(NULL)) < 0) {
len += sprintf(p + len, "level:\t\tunreadable\n");
} else {
len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
len += sprintf(p + len, "commands:\tup, down\n");
len += sprintf(p + len, "commands:\tlevel <level>"
" (<level> is 0-7)\n");
}
return len;
}
#define BRIGHTNESS_UP 4
#define BRIGHTNESS_DOWN 5
static int brightness_set(int value)
{
int cmos_cmd, inc, i;
int current_value = brightness_get(NULL);
value &= 7;
cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
inc = value > current_value ? 1 : -1;
for (i = current_value; i != value; i += inc) {
if (!cmos_eval(cmos_cmd))
return -EIO;
if (!acpi_ec_write(brightness_offset, i + inc))
return -EIO;
}
return 0;
}
static int brightness_write(char *buf)
{
int level;
int new_level;
char *cmd;
while ((cmd = next_cmd(&buf))) {
if ((level = brightness_get(NULL)) < 0)
return level;
level &= 7;
if (strlencmp(cmd, "up") == 0) {
new_level = level == 7 ? 7 : level + 1;
} else if (strlencmp(cmd, "down") == 0) {
new_level = level == 0 ? 0 : level - 1;
} else if (sscanf(cmd, "level %d", &new_level) == 1 &&
new_level >= 0 && new_level <= 7) {
/* new_level set */
} else
return -EINVAL;
brightness_set(new_level);
}
return 0;
}
static int brightness_update_status(struct backlight_device *bd)
{
return brightness_set(bd->props->brightness);
}
static struct backlight_properties ibm_backlight_data = {
.owner = THIS_MODULE,
.get_brightness = brightness_get,
.update_status = brightness_update_status,
.max_brightness = 7,
};
static int brightness_init(void)
{
ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
&ibm_backlight_data);
if (IS_ERR(ibm_backlight_device)) {
printk(IBM_ERR "Could not register backlight device\n");
return PTR_ERR(ibm_backlight_device);
}
return 0;
}
static void brightness_exit(void)
{
if (ibm_backlight_device) {
backlight_device_unregister(ibm_backlight_device);
ibm_backlight_device = NULL;
}
}
static int volume_offset = 0x30;
static int volume_read(char *p)
{
int len = 0;
u8 level;
if (!acpi_ec_read(volume_offset, &level)) {
len += sprintf(p + len, "level:\t\tunreadable\n");
} else {
len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
len += sprintf(p + len, "commands:\tup, down, mute\n");
len += sprintf(p + len, "commands:\tlevel <level>"
" (<level> is 0-15)\n");
}
return len;
}
#define VOLUME_DOWN 0
#define VOLUME_UP 1
#define VOLUME_MUTE 2
static int volume_write(char *buf)
{
int cmos_cmd, inc, i;
u8 level, mute;
int new_level, new_mute;
char *cmd;
while ((cmd = next_cmd(&buf))) {
if (!acpi_ec_read(volume_offset, &level))
return -EIO;
new_mute = mute = level & 0x40;
new_level = level = level & 0xf;
if (strlencmp(cmd, "up") == 0) {
if (mute)
new_mute = 0;
else
new_level = level == 15 ? 15 : level + 1;
} else if (strlencmp(cmd, "down") == 0) {
if (mute)
new_mute = 0;
else
new_level = level == 0 ? 0 : level - 1;
} else if (sscanf(cmd, "level %d", &new_level) == 1 &&
new_level >= 0 && new_level <= 15) {
/* new_level set */
} else if (strlencmp(cmd, "mute") == 0) {
new_mute = 0x40;
} else
return -EINVAL;
if (new_level != level) { /* mute doesn't change */
cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
inc = new_level > level ? 1 : -1;
if (mute && (!cmos_eval(cmos_cmd) ||
!acpi_ec_write(volume_offset, level)))
return -EIO;
for (i = level; i != new_level; i += inc)
if (!cmos_eval(cmos_cmd) ||
!acpi_ec_write(volume_offset, i + inc))
return -EIO;
if (mute && (!cmos_eval(VOLUME_MUTE) ||
!acpi_ec_write(volume_offset,
new_level + mute)))
return -EIO;
}
if (new_mute != mute) { /* level doesn't change */
cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
if (!cmos_eval(cmos_cmd) ||
!acpi_ec_write(volume_offset, level + new_mute))
return -EIO;
}
}
return 0;
}
static enum fan_status_access_mode fan_status_access_mode;
static enum fan_control_access_mode fan_control_access_mode;
static enum fan_control_commands fan_control_commands;
static int fan_control_status_known;
static u8 fan_control_initial_status;
static void fan_watchdog_fire(struct work_struct *ignored);
static int fan_watchdog_maxinterval;
static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
static int fan_init(void)
{
fan_status_access_mode = IBMACPI_FAN_NONE;
fan_control_access_mode = IBMACPI_FAN_WR_NONE;
fan_control_commands = 0;
fan_control_status_known = 1;
fan_watchdog_maxinterval = 0;
if (gfan_handle) {
/* 570, 600e/x, 770e, 770x */
fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
} else {
/* all other ThinkPads: note that even old-style
* ThinkPad ECs supports the fan control register */
if (likely(acpi_ec_read(fan_status_offset,
&fan_control_initial_status))) {
fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
/* In some ThinkPads, neither the EC nor the ACPI
* DSDT initialize the fan status, and it ends up
* being set to 0x07 when it *could* be either
* 0x07 or 0x80.
*
* Enable for TP-1Y (T43), TP-78 (R51e),
* TP-76 (R52), TP-70 (T43, R52), which are known
* to be buggy. */
if (fan_control_initial_status == 0x07 &&
ibm_thinkpad_ec_found &&
((ibm_thinkpad_ec_found[0] == '1' &&
ibm_thinkpad_ec_found[1] == 'Y') ||
(ibm_thinkpad_ec_found[0] == '7' &&
(ibm_thinkpad_ec_found[1] == '6' ||
ibm_thinkpad_ec_found[1] == '8' ||
ibm_thinkpad_ec_found[1] == '0'))
)) {
printk(IBM_NOTICE
"fan_init: initial fan status is "
"unknown, assuming it is in auto "
"mode\n");
fan_control_status_known = 0;
}
} else {
printk(IBM_ERR
"ThinkPad ACPI EC access misbehaving, "
"fan status and control unavailable\n");
return 0;
}
}
if (sfan_handle) {
/* 570, 770x-JL */
fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
fan_control_commands |=
IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
} else {
if (!gfan_handle) {
/* gfan without sfan means no fan control */
/* all other models implement TP EC 0x2f control */
if (fans_handle) {
/* X31, X40, X41 */
fan_control_access_mode =
IBMACPI_FAN_WR_ACPI_FANS;
fan_control_commands |=
IBMACPI_FAN_CMD_SPEED |
IBMACPI_FAN_CMD_LEVEL |
IBMACPI_FAN_CMD_ENABLE;
} else {
fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
fan_control_commands |=
IBMACPI_FAN_CMD_LEVEL |
IBMACPI_FAN_CMD_ENABLE;
}
}
}
return 0;
}
static int fan_get_status(u8 *status)
{
u8 s;
/* TODO:
* Add IBMACPI_FAN_RD_ACPI_FANS ? */
switch (fan_status_access_mode) {
case IBMACPI_FAN_RD_ACPI_GFAN:
/* 570, 600e/x, 770e, 770x */
if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
return -EIO;
if (likely(status))
*status = s & 0x07;
break;
case IBMACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
return -EIO;
if (likely(status))
*status = s;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_get_speed(unsigned int *speed)
{
u8 hi, lo;
switch (fan_status_access_mode) {
case IBMACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
!acpi_ec_read(fan_rpm_offset + 1, &hi)))
return -EIO;
if (likely(speed))
*speed = (hi << 8) | lo;
break;
default:
return -ENXIO;
}
return 0;
}
static void fan_exit(void)
{
cancel_delayed_work(&fan_watchdog_task);
flush_scheduled_work();
}
static void fan_watchdog_reset(void)
{
static int fan_watchdog_active = 0;
if (fan_watchdog_active)
cancel_delayed_work(&fan_watchdog_task);
if (fan_watchdog_maxinterval > 0) {
fan_watchdog_active = 1;
if (!schedule_delayed_work(&fan_watchdog_task,
msecs_to_jiffies(fan_watchdog_maxinterval
* 1000))) {
printk(IBM_ERR "failed to schedule the fan watchdog, "
"watchdog will not trigger\n");
}
} else
fan_watchdog_active = 0;
}
static int fan_read(char *p)
{
int len = 0;
int rc;
u8 status;
unsigned int speed = 0;
switch (fan_status_access_mode) {
case IBMACPI_FAN_RD_ACPI_GFAN:
/* 570, 600e/x, 770e, 770x */
if ((rc = fan_get_status(&status)) < 0)
return rc;
len += sprintf(p + len, "status:\t\t%s\n"
"level:\t\t%d\n",
(status != 0) ? "enabled" : "disabled", status);
break;
case IBMACPI_FAN_RD_TPEC:
/* all except 570, 600e/x, 770e, 770x */
if ((rc = fan_get_status(&status)) < 0)
return rc;
if (unlikely(!fan_control_status_known)) {
if (status != fan_control_initial_status)
fan_control_status_known = 1;
else
/* Return most likely status. In fact, it
* might be the only possible status */
status = IBMACPI_FAN_EC_AUTO;
}
len += sprintf(p + len, "status:\t\t%s\n",
(status != 0) ? "enabled" : "disabled");
/* No ThinkPad boots on disengaged mode, we can safely
* assume the tachometer is online if fan control status
* was unknown */
if ((rc = fan_get_speed(&speed)) < 0)
return rc;
len += sprintf(p + len, "speed:\t\t%d\n", speed);
if (status & IBMACPI_FAN_EC_DISENGAGED)
/* Disengaged mode takes precedence */
len += sprintf(p + len, "level:\t\tdisengaged\n");
else if (status & IBMACPI_FAN_EC_AUTO)
len += sprintf(p + len, "level:\t\tauto\n");
else
len += sprintf(p + len, "level:\t\t%d\n", status);
break;
case IBMACPI_FAN_NONE:
default:
len += sprintf(p + len, "status:\t\tnot supported\n");
}
if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
len += sprintf(p + len, "commands:\tlevel <level>");
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_SFAN:
len += sprintf(p + len, " (<level> is 0-7)\n");
break;
default:
len += sprintf(p + len, " (<level> is 0-7, "
"auto, disengaged)\n");
break;
}
}
if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
len += sprintf(p + len, "commands:\tenable, disable\n"
"commands:\twatchdog <timeout> (<timeout> is 0 (off), "
"1-120 (seconds))\n");
if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
len += sprintf(p + len, "commands:\tspeed <speed>"
" (<speed> is 0-65535)\n");
return len;
}
static int fan_set_level(int level)
{
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_SFAN:
if (level >= 0 && level <= 7) {
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
return -EIO;
} else
return -EINVAL;
break;
case IBMACPI_FAN_WR_ACPI_FANS:
case IBMACPI_FAN_WR_TPEC:
if ((level != IBMACPI_FAN_EC_AUTO) &&
(level != IBMACPI_FAN_EC_DISENGAGED) &&
((level < 0) || (level > 7)))
return -EINVAL;
if (!acpi_ec_write(fan_status_offset, level))
return -EIO;
else
fan_control_status_known = 1;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_enable(void)
{
u8 s;
int rc;
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_FANS:
case IBMACPI_FAN_WR_TPEC:
if ((rc = fan_get_status(&s)) < 0)
return rc;
/* Don't go out of emergency fan mode */
if (s != 7)
s = IBMACPI_FAN_EC_AUTO;
if (!acpi_ec_write(fan_status_offset, s))
return -EIO;
else
fan_control_status_known = 1;
break;
case IBMACPI_FAN_WR_ACPI_SFAN:
if ((rc = fan_get_status(&s)) < 0)
return rc;
s &= 0x07;
/* Set fan to at least level 4 */
if (s < 4)
s = 4;
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
return -EIO;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_disable(void)
{
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_FANS:
case IBMACPI_FAN_WR_TPEC:
if (!acpi_ec_write(fan_status_offset, 0x00))
return -EIO;
else
fan_control_status_known = 1;
break;
case IBMACPI_FAN_WR_ACPI_SFAN:
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
return -EIO;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_speed(int speed)
{
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_FANS:
if (speed >= 0 && speed <= 65535) {
if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
speed, speed, speed))
return -EIO;
} else
return -EINVAL;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_write_cmd_level(const char *cmd, int *rc)
{
int level;
if (strlencmp(cmd, "level auto") == 0)
level = IBMACPI_FAN_EC_AUTO;
else if (strlencmp(cmd, "level disengaged") == 0)
level = IBMACPI_FAN_EC_DISENGAGED;
else if (sscanf(cmd, "level %d", &level) != 1)
return 0;
if ((*rc = fan_set_level(level)) == -ENXIO)
printk(IBM_ERR "level command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_enable(const char *cmd, int *rc)
{
if (strlencmp(cmd, "enable") != 0)
return 0;
if ((*rc = fan_set_enable()) == -ENXIO)
printk(IBM_ERR "enable command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_disable(const char *cmd, int *rc)
{
if (strlencmp(cmd, "disable") != 0)
return 0;
if ((*rc = fan_set_disable()) == -ENXIO)
printk(IBM_ERR "disable command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_speed(const char *cmd, int *rc)
{
int speed;
/* TODO:
* Support speed <low> <medium> <high> ? */
if (sscanf(cmd, "speed %d", &speed) != 1)
return 0;
if ((*rc = fan_set_speed(speed)) == -ENXIO)
printk(IBM_ERR "speed command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_watchdog(const char *cmd, int *rc)
{
int interval;
if (sscanf(cmd, "watchdog %d", &interval) != 1)
return 0;
if (interval < 0 || interval > 120)
*rc = -EINVAL;
else
fan_watchdog_maxinterval = interval;
return 1;
}
static int fan_write(char *buf)
{
char *cmd;
int rc = 0;
while (!rc && (cmd = next_cmd(&buf))) {
if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
fan_write_cmd_level(cmd, &rc)) &&
!((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
(fan_write_cmd_enable(cmd, &rc) ||
fan_write_cmd_disable(cmd, &rc) ||
fan_write_cmd_watchdog(cmd, &rc))) &&
!((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
fan_write_cmd_speed(cmd, &rc))
)
rc = -EINVAL;
else if (!rc)
fan_watchdog_reset();
}
return rc;
}
static void fan_watchdog_fire(struct work_struct *ignored)
{
printk(IBM_NOTICE "fan watchdog: enabling fan\n");
if (fan_set_enable()) {
printk(IBM_ERR "fan watchdog: error while enabling fan\n");
/* reschedule for later */
fan_watchdog_reset();
}
}
static struct ibm_struct ibms[] = {
{
.name = "driver",
.init = ibm_acpi_driver_init,
.read = driver_read,
},
{
.name = "hotkey",
.hid = IBM_HKEY_HID,
.init = hotkey_init,
.read = hotkey_read,
.write = hotkey_write,
.exit = hotkey_exit,
.notify = hotkey_notify,
.handle = &hkey_handle,
.type = ACPI_DEVICE_NOTIFY,
},
{
.name = "bluetooth",
.init = bluetooth_init,
.read = bluetooth_read,
.write = bluetooth_write,
},
{
.name = "wan",
.init = wan_init,
.read = wan_read,
.write = wan_write,
.experimental = 1,
},
{
.name = "video",
.init = video_init,
.read = video_read,
.write = video_write,
.exit = video_exit,
},
{
.name = "light",
.init = light_init,
.read = light_read,
.write = light_write,
},
#ifdef CONFIG_ACPI_IBM_DOCK
{
.name = "dock",
.read = dock_read,
.write = dock_write,
.notify = dock_notify,
.handle = &dock_handle,
.type = ACPI_SYSTEM_NOTIFY,
},
{
.name = "dock",
.hid = IBM_PCI_HID,
.notify = dock_notify,
.handle = &pci_handle,
.type = ACPI_SYSTEM_NOTIFY,
},
#endif
{
.name = "bay",
.init = bay_init,
.read = bay_read,
.write = bay_write,
.notify = bay_notify,
.handle = &bay_handle,
.type = ACPI_SYSTEM_NOTIFY,
},
{
.name = "cmos",
.read = cmos_read,
.write = cmos_write,
},
{
.name = "led",
.init = led_init,
.read = led_read,
.write = led_write,
},
{
.name = "beep",
.read = beep_read,
.write = beep_write,
},
{
.name = "thermal",
.init = thermal_init,
.read = thermal_read,
},
{
.name = "ecdump",
.read = ecdump_read,
.write = ecdump_write,
.experimental = 1,
},
{
.name = "brightness",
.read = brightness_read,
.write = brightness_write,
.init = brightness_init,
.exit = brightness_exit,
},
{
.name = "volume",
.read = volume_read,
.write = volume_write,
},
{
.name = "fan",
.read = fan_read,
.write = fan_write,
.init = fan_init,
.exit = fan_exit,
.experimental = 1,
},
};
static int dispatch_read(char *page, char **start, off_t off, int count,
int *eof, void *data)
{
struct ibm_struct *ibm = data;
int len;
if (!ibm || !ibm->read)
return -EINVAL;
len = ibm->read(page);
if (len < 0)
return len;
if (len <= off + count)
*eof = 1;
*start = page + off;
len -= off;
if (len > count)
len = count;
if (len < 0)
len = 0;
return len;
}
static int dispatch_write(struct file *file, const char __user * userbuf,
unsigned long count, void *data)
{
struct ibm_struct *ibm = data;
char *kernbuf;
int ret;
if (!ibm || !ibm->write)
return -EINVAL;
kernbuf = kmalloc(count + 2, GFP_KERNEL);
if (!kernbuf)
return -ENOMEM;
if (copy_from_user(kernbuf, userbuf, count)) {
kfree(kernbuf);
return -EFAULT;
}
kernbuf[count] = 0;
strcat(kernbuf, ",");
ret = ibm->write(kernbuf);
if (ret == 0)
ret = count;
kfree(kernbuf);
return ret;
}
static void dispatch_notify(acpi_handle handle, u32 event, void *data)
{
struct ibm_struct *ibm = data;
if (!ibm || !ibm->notify)
return;
ibm->notify(ibm, event);
}
static int __init setup_notify(struct ibm_struct *ibm)
{
acpi_status status;
int ret;
if (!*ibm->handle)
return 0;
ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
if (ret < 0) {
printk(IBM_ERR "%s device not present\n", ibm->name);
return 0;
}
acpi_driver_data(ibm->device) = ibm;
sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
status = acpi_install_notify_handler(*ibm->handle, ibm->type,
dispatch_notify, ibm);
if (ACPI_FAILURE(status)) {
printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
ibm->name, status);
return -ENODEV;
}
ibm->notify_installed = 1;
return 0;
}
static int __init ibm_device_add(struct acpi_device *device)
{
return 0;
}
static int __init register_driver(struct ibm_struct *ibm)
{
int ret;
ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
if (!ibm->driver) {
printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
return -1;
}
sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
ibm->driver->ids = ibm->hid;
ibm->driver->ops.add = &ibm_device_add;
ret = acpi_bus_register_driver(ibm->driver);
if (ret < 0) {
printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
ibm->hid, ret);
kfree(ibm->driver);
}
return ret;
}
static int __init ibm_init(struct ibm_struct *ibm)
{
int ret;
struct proc_dir_entry *entry;
if (ibm->experimental && !experimental)
return 0;
if (ibm->hid) {
ret = register_driver(ibm);
if (ret < 0)
return ret;
ibm->driver_registered = 1;
}
if (ibm->init) {
ret = ibm->init();
if (ret != 0)
return ret;
ibm->init_called = 1;
}
if (ibm->read) {
entry = create_proc_entry(ibm->name,
S_IFREG | S_IRUGO | S_IWUSR,
proc_dir);
if (!entry) {
printk(IBM_ERR "unable to create proc entry %s\n",
ibm->name);
return -ENODEV;
}
entry->owner = THIS_MODULE;
entry->data = ibm;
entry->read_proc = &dispatch_read;
if (ibm->write)
entry->write_proc = &dispatch_write;
ibm->proc_created = 1;
}
if (ibm->notify) {
ret = setup_notify(ibm);
if (ret < 0)
return ret;
}
return 0;
}
static void ibm_exit(struct ibm_struct *ibm)
{
if (ibm->notify_installed)
acpi_remove_notify_handler(*ibm->handle, ibm->type,
dispatch_notify);
if (ibm->proc_created)
remove_proc_entry(ibm->name, proc_dir);
if (ibm->init_called && ibm->exit)
ibm->exit();
if (ibm->driver_registered) {
acpi_bus_unregister_driver(ibm->driver);
kfree(ibm->driver);
}
}
static void __init ibm_handle_init(char *name,
acpi_handle * handle, acpi_handle parent,
char **paths, int num_paths, char **path)
{
int i;
acpi_status status;
for (i = 0; i < num_paths; i++) {
status = acpi_get_handle(parent, paths[i], handle);
if (ACPI_SUCCESS(status)) {
*path = paths[i];
return;
}
}
*handle = NULL;
}
#define IBM_HANDLE_INIT(object) \
ibm_handle_init(#object, &object##_handle, *object##_parent, \
object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
static int __init set_ibm_param(const char *val, struct kernel_param *kp)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(ibms); i++)
if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
if (strlen(val) > sizeof(ibms[i].param) - 2)
return -ENOSPC;
strcpy(ibms[i].param, val);
strcat(ibms[i].param, ",");
return 0;
}
return -EINVAL;
}
#define IBM_PARAM(feature) \
module_param_call(feature, set_ibm_param, NULL, NULL, 0)
IBM_PARAM(hotkey);
IBM_PARAM(bluetooth);
IBM_PARAM(video);
IBM_PARAM(light);
#ifdef CONFIG_ACPI_IBM_DOCK
IBM_PARAM(dock);
#endif
IBM_PARAM(bay);
IBM_PARAM(cmos);
IBM_PARAM(led);
IBM_PARAM(beep);
IBM_PARAM(ecdump);
IBM_PARAM(brightness);
IBM_PARAM(volume);
IBM_PARAM(fan);
static void acpi_ibm_exit(void)
{
int i;
for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
ibm_exit(&ibms[i]);
if (proc_dir)
remove_proc_entry(IBM_DIR, acpi_root_dir);
if (ibm_thinkpad_ec_found)
kfree(ibm_thinkpad_ec_found);
}
static char* __init check_dmi_for_ec(void)
{
struct dmi_device *dev = NULL;
char ec_fw_string[18];
/*
* ThinkPad T23 or newer, A31 or newer, R50e or newer,
* X32 or newer, all Z series; Some models must have an
* up-to-date BIOS or they will not be detected.
*
* See http://thinkwiki.org/wiki/List_of_DMI_IDs
*/
while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
if (sscanf(dev->name,
"IBM ThinkPad Embedded Controller -[%17c",
ec_fw_string) == 1) {
ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
return kstrdup(ec_fw_string, GFP_KERNEL);
}
}
return NULL;
}
static int __init acpi_ibm_init(void)
{
int ret, i;
if (acpi_disabled)
return -ENODEV;
if (!acpi_specific_hotkey_enabled) {
printk(IBM_ERR "using generic hotkey driver\n");
return -ENODEV;
}
/* ec is required because many other handles are relative to it */
IBM_HANDLE_INIT(ec);
if (!ec_handle) {
printk(IBM_ERR "ec object not found\n");
return -ENODEV;
}
/* Models with newer firmware report the EC in DMI */
ibm_thinkpad_ec_found = check_dmi_for_ec();
/* these handles are not required */
IBM_HANDLE_INIT(vid);
IBM_HANDLE_INIT(vid2);
IBM_HANDLE_INIT(ledb);
IBM_HANDLE_INIT(led);
IBM_HANDLE_INIT(hkey);
IBM_HANDLE_INIT(lght);
IBM_HANDLE_INIT(cmos);
#ifdef CONFIG_ACPI_IBM_DOCK
IBM_HANDLE_INIT(dock);
#endif
IBM_HANDLE_INIT(pci);
IBM_HANDLE_INIT(bay);
if (bay_handle)
IBM_HANDLE_INIT(bay_ej);
IBM_HANDLE_INIT(bay2);
if (bay2_handle)
IBM_HANDLE_INIT(bay2_ej);
IBM_HANDLE_INIT(beep);
IBM_HANDLE_INIT(ecrd);
IBM_HANDLE_INIT(ecwr);
IBM_HANDLE_INIT(fans);
IBM_HANDLE_INIT(gfan);
IBM_HANDLE_INIT(sfan);
proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
if (!proc_dir) {
printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
acpi_ibm_exit();
return -ENODEV;
}
proc_dir->owner = THIS_MODULE;
for (i = 0; i < ARRAY_SIZE(ibms); i++) {
ret = ibm_init(&ibms[i]);
if (ret >= 0 && *ibms[i].param)
ret = ibms[i].write(ibms[i].param);
if (ret < 0) {
acpi_ibm_exit();
return ret;
}
}
return 0;
}
module_init(acpi_ibm_init);
module_exit(acpi_ibm_exit);
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