From b59727965d7f286489206c292e2788d4835a8a23 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:17 -0300 Subject: ACPI: thinkpad-acpi: BIOS backlight mode helper (v2.1) Lenovo ThinkPads with generic ACPI backlight level control can be easily set to react to keyboard brightness key presses in a more predictable way than what they do when in "DOS / bootloader" mode after Linux brings up the ACPI interface. The switch to the ACPI backlight mode in the firmware is designed to be safe to use only as an one way trapdoor. One is not to force the firmware to switch back to "DOS/bootloader" mode except by rebooting. The mode switch itself is performed by calling any of the ACPI _BCL methods at least once. When in ACPI mode, the backlight firmware just issues (standard) events for the brightness up/down hot key presses along with the non-standard HKEY events which thinkpad-acpi traps, and doesn't touch the hardware. thinkpad-acpi will: 1. Place the ThinkPad firmware in ACPI backlight control mode if one is available 2. Suppress HKEY backlight change notifications by default to avoid double-reporting when ACPI video is loaded when the ThinkPad is in ACPI backlight control mode 3. Urge the user to load the ACPI video driver The user is free to use either the ACPI video driver to get the brightness key events, or to override the thinkpad-acpi default hotkey mask to get them from thinkpad-acpi as well (this will result in duplicate events if ACPI video is loaded, so let's hope distros won't screw this up). Provided userspace is sane, all should work (and *keep* working), which is more that can be said about the non-ACPI mode of the new Lenovo ThinkPad BIOSes when coupled to current userspace and X.org drivers. Full guidelines for backlight hot key reporting and use of the thinkpad-acpi backlight interface have been added to the documentation. Signed-off-by: Henrique de Moraes Holschuh Cc: Matthew Garrett Cc: Thomas Renninger Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 238 ++++++++++++++++++++++++------------------- 1 file changed, 133 insertions(+), 105 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 6cb781262f9..2c85a2e10a2 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -225,6 +225,7 @@ static struct { u32 light:1; u32 light_status:1; u32 bright_16levels:1; + u32 bright_acpimode:1; u32 wan:1; u32 fan_ctrl_status_undef:1; u32 input_device_registered:1; @@ -807,6 +808,80 @@ static int parse_strtoul(const char *buf, return 0; } +static int __init tpacpi_query_bcl_levels(acpi_handle handle) +{ + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + int rc; + + if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) { + obj = (union acpi_object *)buffer.pointer; + if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { + printk(TPACPI_ERR "Unknown _BCL data, " + "please report this to %s\n", TPACPI_MAIL); + rc = 0; + } else { + rc = obj->package.count; + } + } else { + return 0; + } + + kfree(buffer.pointer); + return rc; +} + +static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle, + u32 lvl, void *context, void **rv) +{ + char name[ACPI_PATH_SEGMENT_LENGTH]; + struct acpi_buffer buffer = { sizeof(name), &name }; + + if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) && + !strncmp("_BCL", name, sizeof(name) - 1)) { + BUG_ON(!rv || !*rv); + **(int **)rv = tpacpi_query_bcl_levels(handle); + return AE_CTRL_TERMINATE; + } else { + return AE_OK; + } +} + +/* + * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map + */ +static int __init tpacpi_check_std_acpi_brightness_support(void) +{ + int status; + int bcl_levels = 0; + void *bcl_ptr = &bcl_levels; + + if (!vid_handle) { + TPACPI_ACPIHANDLE_INIT(vid); + } + if (!vid_handle) + return 0; + + /* + * Search for a _BCL method, and execute it. This is safe on all + * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista + * BIOS in ACPI backlight control mode. We do NOT have to care + * about calling the _BCL method in an enabled video device, any + * will do for our purposes. + */ + + status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3, + tpacpi_acpi_walk_find_bcl, NULL, + &bcl_ptr); + + if (ACPI_SUCCESS(status) && bcl_levels > 2) { + tp_features.bright_acpimode = 1; + return (bcl_levels - 2); + } + + return 0; +} + /************************************************************************* * thinkpad-acpi driver attributes */ @@ -1887,6 +1962,9 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) KEY_UNKNOWN, /* 0x0D: FN+INSERT */ KEY_UNKNOWN, /* 0x0E: FN+DELETE */ + /* These either have to go through ACPI video, or + * act like in the IBM ThinkPads, so don't ever + * enable them by default */ KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ KEY_RESERVED, /* 0x10: FN+END (brightness down) */ @@ -2091,6 +2169,32 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit); } + /* Do not issue duplicate brightness change events to + * userspace */ + if (!tp_features.bright_acpimode) + /* update bright_acpimode... */ + tpacpi_check_std_acpi_brightness_support(); + + if (tp_features.bright_acpimode) { + printk(TPACPI_INFO + "This ThinkPad has standard ACPI backlight " + "brightness control, supported by the ACPI " + "video driver\n"); + printk(TPACPI_NOTICE + "Disabling thinkpad-acpi brightness events " + "by default...\n"); + + /* The hotkey_reserved_mask change below is not + * necessary while the keys are at KEY_RESERVED in the + * default map, but better safe than sorry, leave it + * here as a marker of what we have to do, especially + * when we finally become able to set this at runtime + * on response to X.org requests */ + hotkey_reserved_mask |= + (1 << TP_ACPI_HOTKEYSCAN_FNHOME) + | (1 << TP_ACPI_HOTKEYSCAN_FNEND); + } + dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n"); res = hotkey_status_set(1); @@ -4273,100 +4377,6 @@ static struct backlight_ops ibm_backlight_data = { /* --------------------------------------------------------------------- */ -static int __init tpacpi_query_bcll_levels(acpi_handle handle) -{ - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - int rc; - - if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) { - obj = (union acpi_object *)buffer.pointer; - if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { - printk(TPACPI_ERR "Unknown BCLL data, " - "please report this to %s\n", TPACPI_MAIL); - rc = 0; - } else { - rc = obj->package.count; - } - } else { - return 0; - } - - kfree(buffer.pointer); - return rc; -} - -static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl, - void *context, void **rv) -{ - char name[ACPI_PATH_SEGMENT_LENGTH]; - struct acpi_buffer buffer = { sizeof(name), &name }; - - if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) && - !strncmp("BCLL", name, sizeof(name) - 1)) { - if (tpacpi_query_bcll_levels(handle) == 16) { - *rv = handle; - return AE_CTRL_TERMINATE; - } else { - return AE_OK; - } - } else { - return AE_OK; - } -} - -static int __init brightness_check_levels(void) -{ - int status; - void *found_node = NULL; - - if (!vid_handle) { - TPACPI_ACPIHANDLE_INIT(vid); - } - if (!vid_handle) - return 0; - - /* Search for a BCLL package with 16 levels */ - status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3, - brightness_find_bcll, NULL, - &found_node); - - return (ACPI_SUCCESS(status) && found_node != NULL); -} - -static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl, - void *context, void **rv) -{ - char name[ACPI_PATH_SEGMENT_LENGTH]; - struct acpi_buffer buffer = { sizeof(name), &name }; - - if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) && - !strncmp("_BCL", name, sizeof(name) - 1)) { - *rv = handle; - return AE_CTRL_TERMINATE; - } else { - return AE_OK; - } -} - -static int __init brightness_check_std_acpi_support(void) -{ - int status; - void *found_node = NULL; - - if (!vid_handle) { - TPACPI_ACPIHANDLE_INIT(vid); - } - if (!vid_handle) - return 0; - - /* Search for a _BCL method, but don't execute it */ - status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3, - brightness_find_bcl, NULL, &found_node); - - return (ACPI_SUCCESS(status) && found_node != NULL); -} - static int __init brightness_init(struct ibm_init_struct *iibm) { int b; @@ -4375,13 +4385,19 @@ static int __init brightness_init(struct ibm_init_struct *iibm) mutex_init(&brightness_mutex); - if (!brightness_enable) { - dbg_printk(TPACPI_DBG_INIT, - "brightness support disabled by " - "module parameter\n"); - return 1; - } else if (brightness_enable > 1) { - if (brightness_check_std_acpi_support()) { + /* + * We always attempt to detect acpi support, so as to switch + * Lenovo Vista BIOS to ACPI brightness mode even if we are not + * going to publish a backlight interface + */ + b = tpacpi_check_std_acpi_brightness_support(); + if (b > 0) { + if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) { + printk(TPACPI_NOTICE + "Lenovo BIOS switched to ACPI backlight " + "control mode\n"); + } + if (brightness_enable > 1) { printk(TPACPI_NOTICE "standard ACPI backlight interface " "available, not loading native one...\n"); @@ -4389,6 +4405,22 @@ static int __init brightness_init(struct ibm_init_struct *iibm) } } + if (!brightness_enable) { + dbg_printk(TPACPI_DBG_INIT, + "brightness support disabled by " + "module parameter\n"); + return 1; + } + + if (b > 16) { + printk(TPACPI_ERR + "Unsupported brightness interface, " + "please contact %s\n", TPACPI_MAIL); + return 1; + } + if (b == 16) + tp_features.bright_16levels = 1; + if (!brightness_mode) { if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) brightness_mode = 2; @@ -4402,10 +4434,6 @@ static int __init brightness_init(struct ibm_init_struct *iibm) if (brightness_mode > 3) return -EINVAL; - tp_features.bright_16levels = - thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO && - brightness_check_levels(); - b = brightness_get(NULL); if (b < 0) return 1; -- cgit v1.2.3 From 92889022250d736e135ca92fbffd1ab0ea4780d1 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:18 -0300 Subject: ACPI: thinkpad-acpi: warn once about weird hotkey masks thinkpad-acpi knows for a while now how to best program the hotkeys by default, and always enable them by default. Unfortunately, this information has not filtered down everywhere it needs to, yet. Notably, old ibm-acpi documentation and most "thinkpad setup guides" will have wrong information on this area. Warn the local admin once whenever any of the following patterns are met: 1. Attempts to set hotkey mask to 0xffff (artifact from docs and config for the old ibm-acpi driver and behaviour). This mask makes no real-world sense; 2. Attempts to set hotkey mask to 0xffffffff, which means the user is trying to just have "everything work" without even reading the documentation, or that we need to get a bug report, because there is a new thinkpad out there with new exciting hot keys :-) 3. Attempts to set hotkey mask to 0xffffff, which is almost never the correct way to set up volume and brightness event reporting (and with the current state-of-the-art, it is known to never be right way to do it). The driver will perform any and all requested operations, though, regardless of any warnings. I hope these warnings can be removed one or two years from now. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 2c85a2e10a2..cd263c518e0 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -237,6 +237,10 @@ static struct { u32 hotkey_poll_active:1; } tp_features; +static struct { + u16 hotkey_mask_ff:1; +} tp_warned; + struct thinkpad_id_data { unsigned int vendor; /* ThinkPad vendor: * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ @@ -1182,6 +1186,19 @@ static int hotkey_mask_set(u32 mask) int rc = 0; if (tp_features.hotkey_mask) { + if (!tp_warned.hotkey_mask_ff && + (mask == 0xffff || mask == 0xffffff || + mask == 0xffffffff)) { + tp_warned.hotkey_mask_ff = 1; + printk(TPACPI_NOTICE + "setting the hotkey mask to 0x%08x is likely " + "not the best way to go about it\n", mask); + printk(TPACPI_NOTICE + "please consider using the driver defaults, " + "and refer to up-to-date thinkpad-acpi " + "documentation\n"); + } + HOTKEY_CONFIG_CRITICAL_START for (i = 0; i < 32; i++) { u32 m = 1 << i; -- cgit v1.2.3 From 8c74adbc692a3cb040cc69d7ca3dfd86d75860a8 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:19 -0300 Subject: ACPI: thinkpad-acpi: enhance box identification output (v2) During initialization, thinkpad-acpi outputs some messages to make sure releavant box identification information is easily available in-line with the rest of the driver messages. Enhance those messages to output the alfanumeric model number as well. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index cd263c518e0..601dbe8b407 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -251,7 +251,8 @@ struct thinkpad_id_data { u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */ u16 ec_model; - char *model_str; + char *model_str; /* ThinkPad T43 */ + char *nummodel_str; /* 9384A9C for a 9384-A9C model */ }; static struct thinkpad_id_data thinkpad_id; @@ -988,12 +989,14 @@ static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm) thinkpad_id.ec_version_str : "unknown"); if (thinkpad_id.vendor && thinkpad_id.model_str) - printk(TPACPI_INFO "%s %s\n", + printk(TPACPI_INFO "%s %s, model %s\n", (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? "IBM" : ((thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) ? "Lenovo" : "Unknown vendor"), - thinkpad_id.model_str); + thinkpad_id.model_str, + (thinkpad_id.nummodel_str) ? + thinkpad_id.nummodel_str : "unknown"); return 0; } @@ -5875,6 +5878,9 @@ static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp) kfree(tp->model_str); tp->model_str = NULL; } + + tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME), + GFP_KERNEL); } static int __init probe_for_thinkpad(void) -- cgit v1.2.3 From 2d5e94d7ca315f859a0eee1366838e8ad34dd7b2 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:20 -0300 Subject: ACPI: thinkpad-acpi: rate-limit CMOS/EC unsynced error messages If userspace applications mess with the CMOS NVRAM, or something causes both the ACPI firmware and thinkpad-acpi to try to change the brightness at the same time, it is possible to have the CMOS and EC registers for the current brightness go out of sync. Should that happen, thinkpad-acpi could be really obnoxious when using a brightness_mode of 3 (both EC and CMOS). Instead of complaining a massive number of times, make sure to complain only once until EC and CMOS are back in sync. Signed-off-by: Henrique de Moraes Holschuh Cc: Joerg Platte Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 601dbe8b407..7dc6b73e8f5 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -239,6 +239,7 @@ static struct { static struct { u16 hotkey_mask_ff:1; + u16 bright_cmos_ec_unsync:1; } tp_warned; struct thinkpad_id_data { @@ -4323,13 +4324,20 @@ static int brightness_get(struct backlight_device *bd) level = lcmos; } - if (brightness_mode == 3 && lec != lcmos) { - printk(TPACPI_ERR - "CMOS NVRAM (%u) and EC (%u) do not agree " - "on display brightness level\n", - (unsigned int) lcmos, - (unsigned int) lec); - return -EIO; + if (brightness_mode == 3) { + if (lec == lcmos) + tp_warned.bright_cmos_ec_unsync = 0; + else { + if (!tp_warned.bright_cmos_ec_unsync) { + printk(TPACPI_ERR + "CMOS NVRAM (%u) and EC (%u) do not " + "agree on display brightness level\n", + (unsigned int) lcmos, + (unsigned int) lec); + tp_warned.bright_cmos_ec_unsync = 1; + } + return -EIO; + } } return level; -- cgit v1.2.3 From e11aecf1379e7c4a0293182096e38e5a336696b2 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:21 -0300 Subject: ACPI: thinkpad-acpi: fix brightness dimming control bug ibm-acpi and thinkpad-acpi did not know about bit 5 of the EC backlight level control register (EC 0x31), so it was always forced to zero on any writes. This would disable the BIOS option to *not* use a dimmer backlight level scale while on battery, and who knows what else (there are two other control bits of unknown function). Bit 5 controls the "reduce backlight levels when on battery" optional functionality (active low). Bits 6 and 7 are better left alone as well, instead of being forced to zero. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 64 +++++++++++++++++++++++++++++++++----------- 1 file changed, 49 insertions(+), 15 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 7dc6b73e8f5..5e25abc5400 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -4295,8 +4295,16 @@ static struct ibm_struct ecdump_driver_data = { #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" +enum { + TP_EC_BACKLIGHT = 0x31, + + /* TP_EC_BACKLIGHT bitmasks */ + TP_EC_BACKLIGHT_LVLMSK = 0x1F, + TP_EC_BACKLIGHT_CMDMSK = 0xE0, + TP_EC_BACKLIGHT_MAPSW = 0x20, +}; + static struct backlight_device *ibm_backlight_device; -static int brightness_offset = 0x31; static int brightness_mode; static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ @@ -4305,16 +4313,24 @@ static struct mutex brightness_mutex; /* * ThinkPads can read brightness from two places: EC 0x31, or * CMOS NVRAM byte 0x5E, bits 0-3. + * + * EC 0x31 has the following layout + * Bit 7: unknown function + * Bit 6: unknown function + * Bit 5: Z: honour scale changes, NZ: ignore scale changes + * Bit 4: must be set to zero to avoid problems + * Bit 3-0: backlight brightness level + * + * brightness_get_raw returns status data in the EC 0x31 layout */ -static int brightness_get(struct backlight_device *bd) +static int brightness_get_raw(int *status) { u8 lec = 0, lcmos = 0, level = 0; if (brightness_mode & 1) { - if (!acpi_ec_read(brightness_offset, &lec)) + if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec)) return -EIO; - lec &= (tp_features.bright_16levels)? 0x0f : 0x07; - level = lec; + level = lec & TP_EC_BACKLIGHT_LVLMSK; }; if (brightness_mode & 2) { lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) @@ -4325,6 +4341,8 @@ static int brightness_get(struct backlight_device *bd) } if (brightness_mode == 3) { + *status = lec; /* Prefer EC, CMOS is just a backing store */ + lec &= TP_EC_BACKLIGHT_LVLMSK; if (lec == lcmos) tp_warned.bright_cmos_ec_unsync = 0; else { @@ -4338,9 +4356,11 @@ static int brightness_get(struct backlight_device *bd) } return -EIO; } + } else { + *status = level; } - return level; + return 0; } /* May return EINTR which can always be mapped to ERESTARTSYS */ @@ -4348,19 +4368,22 @@ static int brightness_set(int value) { int cmos_cmd, inc, i, res; int current_value; + int command_bits; - if (value > ((tp_features.bright_16levels)? 15 : 7)) + if (value > ((tp_features.bright_16levels)? 15 : 7) || + value < 0) return -EINVAL; res = mutex_lock_interruptible(&brightness_mutex); if (res < 0) return res; - current_value = brightness_get(NULL); - if (current_value < 0) { - res = current_value; + res = brightness_get_raw(¤t_value); + if (res < 0) goto errout; - } + + command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK; + current_value &= TP_EC_BACKLIGHT_LVLMSK; cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : @@ -4375,7 +4398,8 @@ static int brightness_set(int value) goto errout; } if ((brightness_mode & 1) && - !acpi_ec_write(brightness_offset, i + inc)) { + !acpi_ec_write(TP_EC_BACKLIGHT, + (i + inc) | command_bits)) { res = -EIO; goto errout;; } @@ -4398,6 +4422,17 @@ static int brightness_update_status(struct backlight_device *bd) bd->props.brightness : 0); } +static int brightness_get(struct backlight_device *bd) +{ + int status, res; + + res = brightness_get_raw(&status); + if (res < 0) + return 0; /* FIXME: teach backlight about error handling */ + + return status & TP_EC_BACKLIGHT_LVLMSK; +} + static struct backlight_ops ibm_backlight_data = { .get_brightness = brightness_get, .update_status = brightness_update_status, @@ -4462,8 +4497,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm) if (brightness_mode > 3) return -EINVAL; - b = brightness_get(NULL); - if (b < 0) + if (brightness_get_raw(&b) < 0) return 1; if (tp_features.bright_16levels) @@ -4481,7 +4515,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm) ibm_backlight_device->props.max_brightness = (tp_features.bright_16levels)? 15 : 7; - ibm_backlight_device->props.brightness = b; + ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; backlight_update_status(ibm_backlight_device); return 0; -- cgit v1.2.3 From 95e57ab2cbd8b016327b23d76da8a96cbd26ac0c Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:22 -0300 Subject: ACPI: thinkpad-acpi: claim tpacpi as an official short handle (v1.1) Unfortunately, a lot of stuff in the kernel has size limitations, so "thinkpad-acpi" ends up eating up too much real estate. We were using "tpacpi" in symbols already, but this shorthand was not visible to userland. Document that the driver will use tpacpi as a short hand where necessary, and use it to name the kernel thread for NVRAM polling (now named "ktpacpi_nvramd"). Also, register a module alias with the shorthand. One can refer to the module using the shorthand name. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 5e25abc5400..2b73dfafac9 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -133,8 +133,11 @@ enum { #define TPACPI_PROC_DIR "ibm" #define TPACPI_ACPI_EVENT_PREFIX "ibm" #define TPACPI_DRVR_NAME TPACPI_FILE +#define TPACPI_DRVR_SHORTNAME "tpacpi" #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" +#define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" + #define TPACPI_MAX_ACPI_ARGS 3 /* Debugging */ @@ -1523,8 +1526,7 @@ static void hotkey_poll_setup(int may_warn) (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) { if (!tpacpi_hotkey_task) { tpacpi_hotkey_task = kthread_run(hotkey_kthread, - NULL, - TPACPI_FILE "d"); + NULL, TPACPI_NVRAM_KTHREAD_NAME); if (IS_ERR(tpacpi_hotkey_task)) { tpacpi_hotkey_task = NULL; printk(TPACPI_ERR @@ -6316,6 +6318,8 @@ static int __init thinkpad_acpi_module_init(void) /* Please remove this in year 2009 */ MODULE_ALIAS("ibm_acpi"); +MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); + /* * DMI matching for module autoloading * -- cgit v1.2.3 From 4fa6811b8ade1b7839342824939817a8fc751539 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:23 -0300 Subject: ACPI: thinkpad-acpi: prepare light and LED for sysfs support Do some preparatory work to add sysfs support to the thinklight and thinkpad leds driver. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 191 ++++++++++++++++++++++++++++++------------- 1 file changed, 136 insertions(+), 55 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 2b73dfafac9..5a3fb09f10d 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -67,6 +67,7 @@ #include #include #include +#include #include #include @@ -85,6 +86,8 @@ #define TP_CMOS_VOLUME_MUTE 2 #define TP_CMOS_BRIGHTNESS_UP 4 #define TP_CMOS_BRIGHTNESS_DOWN 5 +#define TP_CMOS_THINKLIGHT_ON 12 +#define TP_CMOS_THINKLIGHT_OFF 13 /* NVRAM Addresses */ enum tp_nvram_addr { @@ -269,6 +272,13 @@ static enum { static int experimental; static u32 dbg_level; +/* Special LED class that can defer work */ +struct tpacpi_led_classdev { + struct led_classdev led_classdev; + struct work_struct work; + enum led_brightness new_brightness; +}; + /**************************************************************************** **************************************************************************** * @@ -3237,6 +3247,39 @@ static struct ibm_struct video_driver_data = { TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ +static int light_get_status(void) +{ + int status = 0; + + if (tp_features.light_status) { + if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) + return -EIO; + return (!!status); + } + + return -ENXIO; +} + +static int light_set_status(int status) +{ + int rc; + + if (tp_features.light) { + if (cmos_handle) { + rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", + (status)? + TP_CMOS_THINKLIGHT_ON : + TP_CMOS_THINKLIGHT_OFF); + } else { + rc = acpi_evalf(lght_handle, NULL, NULL, "vd", + (status)? 1 : 0); + } + return (rc)? 0 : -EIO; + } + + return -ENXIO; +} + static int __init light_init(struct ibm_init_struct *iibm) { vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); @@ -3263,7 +3306,7 @@ static int __init light_init(struct ibm_init_struct *iibm) static int light_read(char *p) { int len = 0; - int status = 0; + int status; if (!tp_features.light) { len += sprintf(p + len, "status:\t\tnot supported\n"); @@ -3271,8 +3314,9 @@ static int light_read(char *p) 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; + status = light_get_status(); + if (status < 0) + return status; len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0)); len += sprintf(p + len, "commands:\ton, off\n"); } @@ -3282,31 +3326,22 @@ static int light_read(char *p) static int light_write(char *buf) { - int cmos_cmd, lght_cmd; char *cmd; - int success; + int newstatus = 0; if (!tp_features.light) return -ENODEV; while ((cmd = next_cmd(&buf))) { if (strlencmp(cmd, "on") == 0) { - cmos_cmd = 0x0c; - lght_cmd = 1; + newstatus = 1; } else if (strlencmp(cmd, "off") == 0) { - cmos_cmd = 0x0d; - lght_cmd = 0; + newstatus = 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; + return light_set_status(newstatus); } static struct ibm_struct light_driver_data = { @@ -3710,6 +3745,12 @@ enum { /* For TPACPI_LED_OLD */ TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ }; +enum led_status_t { + TPACPI_LED_OFF = 0, + TPACPI_LED_ON, + TPACPI_LED_BLINK, +}; + static enum led_access_mode led_supported; TPACPI_HANDLE(led, ec, "SLED", /* 570 */ @@ -3718,6 +3759,69 @@ TPACPI_HANDLE(led, ec, "SLED", /* 570 */ "LED", /* all others */ ); /* R30, R31 */ +static int led_get_status(unsigned int led) +{ + int status; + + switch (led_supported) { + case TPACPI_LED_570: + if (!acpi_evalf(ec_handle, + &status, "GLED", "dd", 1 << led)) + return -EIO; + return (status == 0)? + TPACPI_LED_OFF : + ((status == 1)? + TPACPI_LED_ON : + TPACPI_LED_BLINK); + default: + return -ENXIO; + } + + /* not reached */ +} + +static int led_set_status(unsigned int led, enum led_status_t ledstatus) +{ + /* off, on, blink. Index is led_status_t */ + static const int const led_sled_arg1[] = { 0, 1, 3 }; + static const int const led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */ + static const int const led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */ + static const int const led_led_arg1[] = { 0, 0x80, 0xc0 }; + + int rc = 0; + + switch (led_supported) { + case TPACPI_LED_570: + /* 570 */ + led = 1 << led; + if (!acpi_evalf(led_handle, NULL, NULL, "vdd", + led, led_sled_arg1[ledstatus])) + rc = -EIO; + break; + case TPACPI_LED_OLD: + /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ + led = 1 << led; + rc = ec_write(TPACPI_LED_EC_HLMS, led); + if (rc >= 0) + rc = ec_write(TPACPI_LED_EC_HLBL, + led * led_exp_hlbl[ledstatus]); + if (rc >= 0) + rc = ec_write(TPACPI_LED_EC_HLCL, + led * led_exp_hlcl[ledstatus]); + break; + case TPACPI_LED_NEW: + /* all others */ + if (!acpi_evalf(led_handle, NULL, NULL, "vdd", + led, led_led_arg1[ledstatus])) + rc = -EIO; + break; + default: + rc = -ENXIO; + } + + return rc; +} + static int __init led_init(struct ibm_init_struct *iibm) { vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); @@ -3743,7 +3847,9 @@ static int __init led_init(struct ibm_init_struct *iibm) return (led_supported != TPACPI_LED_NONE)? 0 : 1; } -#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking")) +#define str_led_status(s) \ + ((s) == TPACPI_LED_OFF ? "off" : \ + ((s) == TPACPI_LED_ON ? "on" : "blinking")) static int led_read(char *p) { @@ -3759,11 +3865,11 @@ static int led_read(char *p) /* 570 */ int i, status; for (i = 0; i < 8; i++) { - if (!acpi_evalf(ec_handle, - &status, "GLED", "dd", 1 << i)) + status = led_get_status(i); + if (status < 0) return -EIO; len += sprintf(p + len, "%d:\t\t%s\n", - i, led_status(status)); + i, str_led_status(status)); } } @@ -3773,16 +3879,11 @@ static int led_read(char *p) 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 }; - static int led_write(char *buf) { char *cmd; - int led, ind, ret; + int led, rc; + enum led_status_t s; if (!led_supported) return -ENODEV; @@ -3792,38 +3893,18 @@ static int led_write(char *buf) return -EINVAL; if (strstr(cmd, "off")) { - ind = 0; + s = TPACPI_LED_OFF; } else if (strstr(cmd, "on")) { - ind = 1; + s = TPACPI_LED_ON; } else if (strstr(cmd, "blink")) { - ind = 2; - } else - return -EINVAL; - - if (led_supported == TPACPI_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 == TPACPI_LED_OLD) { - /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ - led = 1 << led; - ret = ec_write(TPACPI_LED_EC_HLMS, led); - if (ret >= 0) - ret = ec_write(TPACPI_LED_EC_HLBL, - led * led_exp_hlbl[ind]); - if (ret >= 0) - ret = ec_write(TPACPI_LED_EC_HLCL, - led * led_exp_hlcl[ind]); - if (ret < 0) - return ret; + s = TPACPI_LED_BLINK; } else { - /* all others */ - if (!acpi_evalf(led_handle, NULL, NULL, "vdd", - led, led_led_arg1[ind])) - return -EIO; + return -EINVAL; } + + rc = led_set_status(led, s); + if (rc < 0) + return rc; } return 0; -- cgit v1.2.3 From e306501d1c4ff610feaba74ac35dd13e470480e6 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:24 -0300 Subject: ACPI: thinkpad-acpi: add sysfs led class support for thinklight (v3.1) Add a sysfs led class interface to the thinklight (light subdriver). Signed-off-by: Henrique de Moraes Holschuh Cc: Richard Purdie Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 57 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 5a3fb09f10d..38a119bd931 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -3280,13 +3280,49 @@ static int light_set_status(int status) return -ENXIO; } +static void light_set_status_worker(struct work_struct *work) +{ + struct tpacpi_led_classdev *data = + container_of(work, struct tpacpi_led_classdev, work); + + if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) + light_set_status((data->new_brightness != LED_OFF)); +} + +static void light_sysfs_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct tpacpi_led_classdev *data = + container_of(led_cdev, + struct tpacpi_led_classdev, + led_classdev); + data->new_brightness = brightness; + schedule_work(&data->work); +} + +static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) +{ + return (light_get_status() == 1)? LED_FULL : LED_OFF; +} + +static struct tpacpi_led_classdev tpacpi_led_thinklight = { + .led_classdev = { + .name = "tpacpi::thinklight", + .brightness_set = &light_sysfs_set, + .brightness_get = &light_sysfs_get, + } +}; + static int __init light_init(struct ibm_init_struct *iibm) { + int rc = 0; + vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); TPACPI_ACPIHANDLE_INIT(ledb); TPACPI_ACPIHANDLE_INIT(lght); TPACPI_ACPIHANDLE_INIT(cmos); + INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; @@ -3300,7 +3336,25 @@ static int __init light_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "light is %s\n", str_supported(tp_features.light)); - return (tp_features.light)? 0 : 1; + if (tp_features.light) { + rc = led_classdev_register(&tpacpi_pdev->dev, + &tpacpi_led_thinklight.led_classdev); + } + + if (rc < 0) { + tp_features.light = 0; + tp_features.light_status = 0; + } else { + rc = (tp_features.light)? 0 : 1; + } + return rc; +} + +static void light_exit(void) +{ + led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); + if (work_pending(&tpacpi_led_thinklight.work)) + flush_scheduled_work(); } static int light_read(char *p) @@ -3348,6 +3402,7 @@ static struct ibm_struct light_driver_data = { .name = "light", .read = light_read, .write = light_write, + .exit = light_exit, }; /************************************************************************* -- cgit v1.2.3 From af116101924914a9655dfad108548d0db58c40f9 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:25 -0300 Subject: ACPI: thinkpad-acpi: add sysfs led class support to thinkpad leds (v3.2) Add a sysfs led class interface to the led subdriver. Signed-off-by: Henrique de Moraes Holschuh Cc: Richard Purdie Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 136 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 135 insertions(+), 1 deletion(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 38a119bd931..2ab3633f4e5 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -277,6 +277,7 @@ struct tpacpi_led_classdev { struct led_classdev led_classdev; struct work_struct work; enum led_brightness new_brightness; + unsigned int led; }; /**************************************************************************** @@ -3814,20 +3815,38 @@ TPACPI_HANDLE(led, ec, "SLED", /* 570 */ "LED", /* all others */ ); /* R30, R31 */ +#define TPACPI_LED_NUMLEDS 8 +static struct tpacpi_led_classdev *tpacpi_leds; +static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; +static const char const *tpacpi_led_names[TPACPI_LED_NUMLEDS] = { + /* there's a limit of 19 chars + NULL before 2.6.26 */ + "tpacpi::power", + "tpacpi:orange:batt", + "tpacpi:green:batt", + "tpacpi::dock_active", + "tpacpi::bay_active", + "tpacpi::dock_batt", + "tpacpi::unknown_led", + "tpacpi::standby", +}; + static int led_get_status(unsigned int led) { int status; + enum led_status_t led_s; switch (led_supported) { case TPACPI_LED_570: if (!acpi_evalf(ec_handle, &status, "GLED", "dd", 1 << led)) return -EIO; - return (status == 0)? + led_s = (status == 0)? TPACPI_LED_OFF : ((status == 1)? TPACPI_LED_ON : TPACPI_LED_BLINK); + tpacpi_led_state_cache[led] = led_s; + return led_s; default: return -ENXIO; } @@ -3874,11 +3893,96 @@ static int led_set_status(unsigned int led, enum led_status_t ledstatus) rc = -ENXIO; } + if (!rc) + tpacpi_led_state_cache[led] = ledstatus; + return rc; } +static void led_sysfs_set_status(unsigned int led, + enum led_brightness brightness) +{ + led_set_status(led, + (brightness == LED_OFF) ? + TPACPI_LED_OFF : + (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ? + TPACPI_LED_BLINK : TPACPI_LED_ON); +} + +static void led_set_status_worker(struct work_struct *work) +{ + struct tpacpi_led_classdev *data = + container_of(work, struct tpacpi_led_classdev, work); + + if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) + led_sysfs_set_status(data->led, data->new_brightness); +} + +static void led_sysfs_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct tpacpi_led_classdev *data = container_of(led_cdev, + struct tpacpi_led_classdev, led_classdev); + + data->new_brightness = brightness; + schedule_work(&data->work); +} + +static int led_sysfs_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, unsigned long *delay_off) +{ + struct tpacpi_led_classdev *data = container_of(led_cdev, + struct tpacpi_led_classdev, led_classdev); + + /* Can we choose the flash rate? */ + if (*delay_on == 0 && *delay_off == 0) { + /* yes. set them to the hardware blink rate (1 Hz) */ + *delay_on = 500; /* ms */ + *delay_off = 500; /* ms */ + } else if ((*delay_on != 500) || (*delay_off != 500)) + return -EINVAL; + + data->new_brightness = TPACPI_LED_BLINK; + schedule_work(&data->work); + + return 0; +} + +static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) +{ + int rc; + + struct tpacpi_led_classdev *data = container_of(led_cdev, + struct tpacpi_led_classdev, led_classdev); + + rc = led_get_status(data->led); + + if (rc == TPACPI_LED_OFF || rc < 0) + rc = LED_OFF; /* no error handling in led class :( */ + else + rc = LED_FULL; + + return rc; +} + +static void led_exit(void) +{ + unsigned int i; + + for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { + if (tpacpi_leds[i].led_classdev.name) + led_classdev_unregister(&tpacpi_leds[i].led_classdev); + } + + kfree(tpacpi_leds); + tpacpi_leds = NULL; +} + static int __init led_init(struct ibm_init_struct *iibm) { + unsigned int i; + int rc; + vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); TPACPI_ACPIHANDLE_INIT(led); @@ -3899,6 +4003,35 @@ static int __init led_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", str_supported(led_supported), led_supported); + tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, + GFP_KERNEL); + if (!tpacpi_leds) { + printk(TPACPI_ERR "Out of memory for LED data\n"); + return -ENOMEM; + } + + for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { + tpacpi_leds[i].led = i; + + tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set; + tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set; + if (led_supported == TPACPI_LED_570) + tpacpi_leds[i].led_classdev.brightness_get = + &led_sysfs_get; + + tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i]; + + INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker); + + rc = led_classdev_register(&tpacpi_pdev->dev, + &tpacpi_leds[i].led_classdev); + if (rc < 0) { + tpacpi_leds[i].led_classdev.name = NULL; + led_exit(); + return rc; + } + } + return (led_supported != TPACPI_LED_NONE)? 0 : 1; } @@ -3969,6 +4102,7 @@ static struct ibm_struct led_driver_data = { .name = "led", .read = led_read, .write = led_write, + .exit = led_exit, }; /************************************************************************* -- cgit v1.2.3 From 10cc92759bb5d6031d308bdde96775f74082bb44 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:27 -0300 Subject: ACPI: thinkpad-acpi: fluff really minor fix Fix a minor (nano?) thing that bothered me at exactly at the wrong time. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 2ab3633f4e5..f471b46dcf5 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -3881,7 +3881,7 @@ static int led_set_status(unsigned int led, enum led_status_t ledstatus) led * led_exp_hlbl[ledstatus]); if (rc >= 0) rc = ec_write(TPACPI_LED_EC_HLCL, - led * led_exp_hlcl[ledstatus]); + led * led_exp_hlcl[ledstatus]); break; case TPACPI_LED_NEW: /* all others */ -- cgit v1.2.3 From e0e3c0615abdb1c3e28356595f7be87627288d5b Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:28 -0300 Subject: ACPI: thinkpad-acpi: use a private workqueue Switch all task workers to a private thinkpad-acpi workqueue. This way, we don't risk causing trouble for other tasks scheduled to the default work queue, as our workers end up needing to access the ACPI EC, run ACPI AML code, trigger SMI traps... and none of those are exactly known to be fast, simple operations. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index f471b46dcf5..d5c08c01fd1 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -140,6 +140,7 @@ enum { #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" +#define TPACPI_WORKQUEUE_NAME "ktpacpid" #define TPACPI_MAX_ACPI_ARGS 3 @@ -272,6 +273,8 @@ static enum { static int experimental; static u32 dbg_level; +static struct workqueue_struct *tpacpi_wq; + /* Special LED class that can defer work */ struct tpacpi_led_classdev { struct led_classdev led_classdev; @@ -3298,7 +3301,7 @@ static void light_sysfs_set(struct led_classdev *led_cdev, struct tpacpi_led_classdev, led_classdev); data->new_brightness = brightness; - schedule_work(&data->work); + queue_work(tpacpi_wq, &data->work); } static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) @@ -3355,7 +3358,7 @@ static void light_exit(void) { led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); if (work_pending(&tpacpi_led_thinklight.work)) - flush_scheduled_work(); + flush_workqueue(tpacpi_wq); } static int light_read(char *p) @@ -3925,7 +3928,7 @@ static void led_sysfs_set(struct led_classdev *led_cdev, struct tpacpi_led_classdev, led_classdev); data->new_brightness = brightness; - schedule_work(&data->work); + queue_work(tpacpi_wq, &data->work); } static int led_sysfs_blink_set(struct led_classdev *led_cdev, @@ -3943,7 +3946,7 @@ static int led_sysfs_blink_set(struct led_classdev *led_cdev, return -EINVAL; data->new_brightness = TPACPI_LED_BLINK; - schedule_work(&data->work); + queue_work(tpacpi_wq, &data->work); return 0; } @@ -5408,11 +5411,11 @@ static void fan_watchdog_reset(void) if (fan_watchdog_maxinterval > 0 && tpacpi_lifecycle != TPACPI_LIFE_EXITING) { fan_watchdog_active = 1; - if (!schedule_delayed_work(&fan_watchdog_task, + if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, msecs_to_jiffies(fan_watchdog_maxinterval * 1000))) { printk(TPACPI_ERR - "failed to schedule the fan watchdog, " + "failed to queue the fan watchdog, " "watchdog will not trigger\n"); } } else @@ -5782,7 +5785,7 @@ static void fan_exit(void) &driver_attr_fan_watchdog); cancel_delayed_work(&fan_watchdog_task); - flush_scheduled_work(); + flush_workqueue(tpacpi_wq); } static int fan_read(char *p) @@ -6436,6 +6439,9 @@ static void thinkpad_acpi_module_exit(void) if (proc_dir) remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); + if (tpacpi_wq) + destroy_workqueue(tpacpi_wq); + kfree(thinkpad_id.bios_version_str); kfree(thinkpad_id.ec_version_str); kfree(thinkpad_id.model_str); @@ -6466,6 +6472,12 @@ static int __init thinkpad_acpi_module_init(void) TPACPI_ACPIHANDLE_INIT(ecrd); TPACPI_ACPIHANDLE_INIT(ecwr); + tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); + if (!tpacpi_wq) { + thinkpad_acpi_module_exit(); + return -ENOMEM; + } + proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); if (!proc_dir) { printk(TPACPI_ERR -- cgit v1.2.3 From 68f12ae5d778279e13e406d3913c74c592307770 Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 26 Apr 2008 01:02:30 -0300 Subject: ACPI: thinkpad-acpi: bump up version to 0.20 Full LED sysfs support, and the rest of the assorted minor fixes and enhancements are a good reason to checkpoint a new version... Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index d5c08c01fd1..d29ad2e4afc 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -21,7 +21,7 @@ * 02110-1301, USA. */ -#define TPACPI_VERSION "0.19" +#define TPACPI_VERSION "0.20" #define TPACPI_SYSFS_VERSION 0x020200 /* -- cgit v1.2.3 From 90fe17f4df2f830601ffd422b11d1f7f9a9d0355 Mon Sep 17 00:00:00 2001 From: Cyrill Gorcunov Date: Fri, 18 Apr 2008 13:27:29 -0700 Subject: thinkpad_acpi: fix possible NULL pointer dereference if kstrdup failed Signed-off-by: Cyrill Gorcunov Acked-by: Henrique de Moraes Holschuh Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/misc/thinkpad_acpi.c') diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 6cb781262f9..31115c9cfb3 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -5826,7 +5826,7 @@ static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp) tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION), GFP_KERNEL); - if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) { + if (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) { kfree(tp->model_str); tp->model_str = NULL; } -- cgit v1.2.3