/* * ibm_acpi.c - IBM ThinkPad ACPI Extras * * * Copyright (C) 2004-2005 Borislav Deianov * Copyright (C) 2006 Henrique de Moraes Holschuh * * 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 * 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 * fix parameter passing on module loading * thanks to Rusty Russell * thanks to Jim Radford * 2004-11-08 0.8 fix init error case, don't return from a macro * thanks to Chris Wright * 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 #include #include #include #include #include #include #include #include #include #include #include #include #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 #ifdef CONFIG_ACPI_IBM_BAY 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 */ #endif /* 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, ¶ms, 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 driver_init(void) { printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION); printk(IBM_INFO "%s\n", IBM_URL); 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, \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; } #if defined(CONFIG_ACPI_IBM_DOCK) || defined(CONFIG_ACPI_IBM_BAY) static int _sta(acpi_handle handle) { int status; if (!handle || !acpi_evalf(handle, &status, "_STA", "d")) status = 0; return status; } #endif #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 #ifdef CONFIG_ACPI_IBM_BAY 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); } #endif 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 ( 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" " on, off, blink ( 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 ( 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 0x" " ( is 00-ff, is 00-ff)\n"); len += sprintf(p + len, "commands:\t0x " " ( is 00-ff, 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 " " ( 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, &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 " " ( 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 "); switch (fan_control_access_mode) { case IBMACPI_FAN_WR_ACPI_SFAN: len += sprintf(p + len, " ( is 0-7)\n"); break; default: len += sprintf(p + len, " ( 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 ( is 0 (off), " "1-120 (seconds))\n"); if (fan_control_commands & IBMACPI_FAN_CMD_SPEED) len += sprintf(p + len, "commands:\tspeed " " ( 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 ? */ 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 = 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 #ifdef CONFIG_ACPI_IBM_BAY { .name = "bay", .init = bay_init, .read = bay_read, .write = bay_write, .notify = bay_notify, .handle = &bay_handle, .type = ACPI_SYSTEM_NOTIFY, }, #endif { .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; } 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 = kmalloc(sizeof(struct acpi_driver), GFP_KERNEL); if (!ibm->driver) { printk(IBM_ERR "kmalloc(ibm->driver) failed\n"); return -1; } memset(ibm->driver, 0, sizeof(struct acpi_driver)); 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; ibm->notify_installed = 1; } 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 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 #ifdef CONFIG_ACPI_IBM_BAY IBM_PARAM(bay); #endif 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]); 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(); if (ibm_thinkpad_ec_found) printk(IBM_INFO "ThinkPad EC firmware %s\n", ibm_thinkpad_ec_found); /* 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); #ifdef CONFIG_ACPI_IBM_BAY IBM_HANDLE_INIT(bay); if (bay_handle) IBM_HANDLE_INIT(bay_ej); IBM_HANDLE_INIT(bay2); if (bay2_handle) IBM_HANDLE_INIT(bay2_ej); #endif 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); 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);