Merge branch 'thinkpad-acpi' into release

2 files changed, 560 insertions, 199 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 3608081bc3e0..d45c6ab729f8 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -226,6 +226,30 @@ config THINKPAD_ACPI_DEBUG
 
 	  If you are not sure, say N here.
 
+config THINKPAD_ACPI_UNSAFE_LEDS
+	bool "Allow control of important LEDs (unsafe)"
+	depends on THINKPAD_ACPI
+	default n
+	---help---
+	  Overriding LED state on ThinkPads can mask important
+	  firmware alerts (like critical battery condition), or misled
+	  the user into damaging the hardware (undocking or ejecting
+	  the bay while buses are still active), etc.
+
+	  LED control on the ThinkPad is write-only (with very few
+	  exceptions on very ancient models), which makes it
+	  impossible to know beforehand if important information will
+	  be lost when one changes LED state.
+
+	  Users that know what they are doing can enable this option
+	  and the driver will allow control of every LED, including
+	  the ones on the dock stations.
+
+	  Never enable this option on a distribution kernel.
+
+	  Say N here, unless you are building a kernel for your own
+	  use, and need to control the important firmware LEDs.
+
 config THINKPAD_ACPI_DOCK
 	bool "Legacy Docking Station Support"
 	depends on THINKPAD_ACPI
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d2433204a40c..ba3682c5cde0 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3,7 +3,7 @@
  *
  *
  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
- *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
+ *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -22,7 +22,7 @@
  */
 
 #define TPACPI_VERSION "0.22"
-#define TPACPI_SYSFS_VERSION 0x020200
+#define TPACPI_SYSFS_VERSION 0x020300
 
 /*
  *  Changelog:
@@ -54,6 +54,7 @@
 #include <linux/string.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
+#include <linux/sched.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
 #include <linux/delay.h>
@@ -172,29 +173,26 @@ enum {
 	TPACPI_RFK_UWB_SW_ID,
 };
 
-/* Debugging */
+/* printk headers */
 #define TPACPI_LOG TPACPI_FILE ": "
-#define TPACPI_ALERT	KERN_ALERT  TPACPI_LOG
-#define TPACPI_CRIT	KERN_CRIT   TPACPI_LOG
-#define TPACPI_ERR	KERN_ERR    TPACPI_LOG
-#define TPACPI_NOTICE	KERN_NOTICE TPACPI_LOG
-#define TPACPI_INFO	KERN_INFO   TPACPI_LOG
-#define TPACPI_DEBUG	KERN_DEBUG  TPACPI_LOG
-
+#define TPACPI_EMERG	KERN_EMERG	TPACPI_LOG
+#define TPACPI_ALERT	KERN_ALERT	TPACPI_LOG
+#define TPACPI_CRIT	KERN_CRIT	TPACPI_LOG
+#define TPACPI_ERR	KERN_ERR	TPACPI_LOG
+#define TPACPI_WARN	KERN_WARNING	TPACPI_LOG
+#define TPACPI_NOTICE	KERN_NOTICE	TPACPI_LOG
+#define TPACPI_INFO	KERN_INFO	TPACPI_LOG
+#define TPACPI_DEBUG	KERN_DEBUG	TPACPI_LOG
+
+/* Debugging printk groups */
 #define TPACPI_DBG_ALL		0xffff
+#define TPACPI_DBG_DISCLOSETASK	0x8000
 #define TPACPI_DBG_INIT		0x0001
 #define TPACPI_DBG_EXIT		0x0002
-#define dbg_printk(a_dbg_level, format, arg...) \
-	do { if (dbg_level & a_dbg_level) \
-		printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
-	} while (0)
-#ifdef CONFIG_THINKPAD_ACPI_DEBUG
-#define vdbg_printk(a_dbg_level, format, arg...) \
-	dbg_printk(a_dbg_level, format, ## arg)
-static const char *str_supported(int is_supported);
-#else
-#define vdbg_printk(a_dbg_level, format, arg...)
-#endif
+#define TPACPI_DBG_RFKILL	0x0004
+#define TPACPI_DBG_HKEY		0x0008
+#define TPACPI_DBG_FAN		0x0010
+#define TPACPI_DBG_BRGHT	0x0020
 
 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
@@ -277,7 +275,6 @@ static struct {
 
 static struct {
 	u16 hotkey_mask_ff:1;
-	u16 bright_cmos_ec_unsync:1;
 } tp_warned;
 
 struct thinkpad_id_data {
@@ -326,6 +323,39 @@ static int tpacpi_uwb_emulstate;
 #endif
 
 
+/*************************************************************************
+ *  Debugging helpers
+ */
+
+#define dbg_printk(a_dbg_level, format, arg...) \
+	do { if (dbg_level & (a_dbg_level)) \
+		printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
+	} while (0)
+
+#ifdef CONFIG_THINKPAD_ACPI_DEBUG
+#define vdbg_printk dbg_printk
+static const char *str_supported(int is_supported);
+#else
+#define vdbg_printk(a_dbg_level, format, arg...) \
+	do { } while (0)
+#endif
+
+static void tpacpi_log_usertask(const char * const what)
+{
+	printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
+		what, task_tgid_vnr(current));
+}
+
+#define tpacpi_disclose_usertask(what, format, arg...) \
+	do { \
+		if (unlikely( \
+		    (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
+		    (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
+			printk(TPACPI_DEBUG "%s: PID %d: " format, \
+				what, task_tgid_vnr(current), ## arg); \
+		} \
+	} while (0)
+
 /****************************************************************************
  ****************************************************************************
  *
@@ -989,10 +1019,13 @@ static int __init tpacpi_new_rfkill(const unsigned int id,
 		/* try to set the initial state as the default for the rfkill
 		 * type, since we ask the firmware to preserve it across S5 in
 		 * NVRAM */
-		rfkill_set_default(rfktype,
+		if (rfkill_set_default(rfktype,
 				(initial_state == RFKILL_STATE_UNBLOCKED) ?
 					RFKILL_STATE_UNBLOCKED :
-					RFKILL_STATE_SOFT_BLOCKED);
+					RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
+			vdbg_printk(TPACPI_DBG_RFKILL,
+				    "Default state for %s cannot be changed\n",
+				    name);
 	}
 
 	*rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
@@ -1020,6 +1053,21 @@ static int __init tpacpi_new_rfkill(const unsigned int id,
 	return 0;
 }
 
+static void printk_deprecated_attribute(const char * const what,
+					const char * const details)
+{
+	tpacpi_log_usertask("deprecated sysfs attribute");
+	printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
+		"will be removed. %s\n",
+		what, details);
+}
+
+static void printk_deprecated_rfkill_attribute(const char * const what)
+{
+	printk_deprecated_attribute(what,
+			"Please switch to generic rfkill before year 2010");
+}
+
 /*************************************************************************
  * thinkpad-acpi driver attributes
  */
@@ -1382,7 +1430,6 @@ static enum {	/* Reasons for waking up */
 
 static int hotkey_autosleep_ack;
 
-static int hotkey_orig_status;
 static u32 hotkey_orig_mask;
 static u32 hotkey_all_mask;
 static u32 hotkey_reserved_mask;
@@ -1529,9 +1576,9 @@ static int hotkey_status_get(int *status)
 	return 0;
 }
 
-static int hotkey_status_set(int status)
+static int hotkey_status_set(bool enable)
 {
-	if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
+	if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
 		return -EIO;
 
 	return 0;
@@ -1847,6 +1894,9 @@ static ssize_t hotkey_enable_show(struct device *dev,
 {
 	int res, status;
 
+	printk_deprecated_attribute("hotkey_enable",
+			"Hotkey reporting is always enabled");
+
 	res = hotkey_status_get(&status);
 	if (res)
 		return res;
@@ -1859,14 +1909,17 @@ static ssize_t hotkey_enable_store(struct device *dev,
 			    const char *buf, size_t count)
 {
 	unsigned long t;
-	int res;
+
+	printk_deprecated_attribute("hotkey_enable",
+			"Hotkeys can be disabled through hotkey_mask");
 
 	if (parse_strtoul(buf, 1, &t))
 		return -EINVAL;
 
-	res = hotkey_status_set(t);
+	if (t == 0)
+		return -EPERM;
 
-	return (res) ? res : count;
+	return count;
 }
 
 static struct device_attribute dev_attr_hotkey_enable =
@@ -1910,6 +1963,8 @@ static ssize_t hotkey_mask_store(struct device *dev,
 
 	mutex_unlock(&hotkey_mutex);
 
+	tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
+
 	return (res) ? res : count;
 }
 
@@ -1922,7 +1977,7 @@ static ssize_t hotkey_bios_enabled_show(struct device *dev,
 			   struct device_attribute *attr,
 			   char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
+	return sprintf(buf, "0\n");
 }
 
 static struct device_attribute dev_attr_hotkey_bios_enabled =
@@ -1996,6 +2051,8 @@ static ssize_t hotkey_source_mask_store(struct device *dev,
 
 	mutex_unlock(&hotkey_mutex);
 
+	tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
+
 	return count;
 }
 
@@ -2028,6 +2085,8 @@ static ssize_t hotkey_poll_freq_store(struct device *dev,
 	hotkey_poll_setup(1);
 	mutex_unlock(&hotkey_mutex);
 
+	tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
+
 	return count;
 }
 
@@ -2197,11 +2256,11 @@ static void hotkey_exit(void)
 	kfree(hotkey_keycode_map);
 
 	if (tp_features.hotkey) {
-		dbg_printk(TPACPI_DBG_EXIT,
+		dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
 			   "restoring original hot key mask\n");
 		/* no short-circuit boolean operator below! */
 		if ((hotkey_mask_set(hotkey_orig_mask) |
-		     hotkey_status_set(hotkey_orig_status)) != 0)
+		     hotkey_status_set(false)) != 0)
 			printk(TPACPI_ERR
 			       "failed to restore hot key mask "
 			       "to BIOS defaults\n");
@@ -2327,7 +2386,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	int status;
 	int hkeyv;
 
-	vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+			"initializing hotkey subdriver\n");
 
 	BUG_ON(!tpacpi_inputdev);
 	BUG_ON(tpacpi_inputdev->open != NULL ||
@@ -2344,7 +2404,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	/* hotkey not supported on 570 */
 	tp_features.hotkey = hkey_handle != NULL;
 
-	vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+		"hotkeys are %s\n",
 		str_supported(tp_features.hotkey));
 
 	if (!tp_features.hotkey)
@@ -2376,10 +2437,14 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 			 * T4x, X31, and later
 			 */
 			tp_features.hotkey_mask = 1;
+			vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+				"firmware HKEY interface version: 0x%x\n",
+				hkeyv);
 		}
 	}
 
-	vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+		"hotkey masks are %s\n",
 		str_supported(tp_features.hotkey_mask));
 
 	if (tp_features.hotkey_mask) {
@@ -2396,10 +2461,6 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 
 	/* hotkey_source_mask *must* be zero for
 	 * the first hotkey_mask_get */
-	res = hotkey_status_get(&hotkey_orig_status);
-	if (res)
-		goto err_exit;
-
 	if (tp_features.hotkey_mask) {
 		res = hotkey_mask_get();
 		if (res)
@@ -2422,7 +2483,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
 	}
 
-	vdbg_printk(TPACPI_DBG_INIT,
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
 		    "hotkey source mask 0x%08x, polling freq %d\n",
 		    hotkey_source_mask, hotkey_poll_freq);
 #endif
@@ -2476,12 +2537,12 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	}
 
 	if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
-		dbg_printk(TPACPI_DBG_INIT,
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
 			   "using Lenovo default hot key map\n");
 		memcpy(hotkey_keycode_map, &lenovo_keycode_map,
 			TPACPI_HOTKEY_MAP_SIZE);
 	} else {
-		dbg_printk(TPACPI_DBG_INIT,
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
 			   "using IBM default hot key map\n");
 		memcpy(hotkey_keycode_map, &ibm_keycode_map,
 			TPACPI_HOTKEY_MAP_SIZE);
@@ -2538,8 +2599,9 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 			| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
 	}
 
-	dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
-	res = hotkey_status_set(1);
+	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+			"enabling firmware HKEY event interface...\n");
+	res = hotkey_status_set(true);
 	if (res) {
 		hotkey_exit();
 		return res;
@@ -2552,8 +2614,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		return res;
 	}
 
-	dbg_printk(TPACPI_DBG_INIT,
-			"legacy hot key reporting over procfs %s\n",
+	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+			"legacy ibm/hotkey event reporting over procfs %s\n",
 			(hotkey_report_mode < 2) ?
 				"enabled" : "disabled");
 
@@ -2884,9 +2946,17 @@ static int hotkey_read(char *p)
 	return len;
 }
 
+static void hotkey_enabledisable_warn(void)
+{
+	tpacpi_log_usertask("procfs hotkey enable/disable");
+	WARN(1, TPACPI_WARN
+	     "hotkey enable/disable functionality has been "
+	     "removed from the driver. Hotkeys are always enabled.\n");
+}
+
 static int hotkey_write(char *buf)
 {
-	int res, status;
+	int res;
 	u32 mask;
 	char *cmd;
 
@@ -2896,17 +2966,16 @@ static int hotkey_write(char *buf)
 	if (mutex_lock_killable(&hotkey_mutex))
 		return -ERESTARTSYS;
 
-	status = -1;
 	mask = hotkey_mask;
 
 	res = 0;
 	while ((cmd = next_cmd(&buf))) {
 		if (strlencmp(cmd, "enable") == 0) {
-			status = 1;
+			hotkey_enabledisable_warn();
 		} else if (strlencmp(cmd, "disable") == 0) {
-			status = 0;
+			hotkey_enabledisable_warn();
+			res = -EPERM;
 		} else if (strlencmp(cmd, "reset") == 0) {
-			status = hotkey_orig_status;
 			mask = hotkey_orig_mask;
 		} else if (sscanf(cmd, "0x%x", &mask) == 1) {
 			/* mask set */
@@ -2917,8 +2986,10 @@ static int hotkey_write(char *buf)
 			goto errexit;
 		}
 	}
-	if (status != -1)
-		res = hotkey_status_set(status);
+
+	if (!res)
+		tpacpi_disclose_usertask("procfs hotkey",
+			"set mask to 0x%08x\n", mask);
 
 	if (!res && mask != hotkey_mask)
 		res = hotkey_mask_set(mask);
@@ -2971,13 +3042,17 @@ enum {
 	TP_ACPI_BLTH_SAVE_STATE		= 0x05, /* Save state for S4/S5 */
 };
 
+#define TPACPI_RFK_BLUETOOTH_SW_NAME	"tpacpi_bluetooth_sw"
+
 static struct rfkill *tpacpi_bluetooth_rfkill;
 
 static void bluetooth_suspend(pm_message_t state)
 {
 	/* Try to make sure radio will resume powered off */
-	acpi_evalf(NULL, NULL, "\\BLTH", "vd",
-		   TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
+	if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
+		   TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
+		vdbg_printk(TPACPI_DBG_RFKILL,
+			"bluetooth power down on resume request failed\n");
 }
 
 static int bluetooth_get_radiosw(void)
@@ -3015,6 +3090,10 @@ static void bluetooth_update_rfk(void)
 	if (status < 0)
 		return;
 	rfkill_force_state(tpacpi_bluetooth_rfkill, status);
+
+	vdbg_printk(TPACPI_DBG_RFKILL,
+		"forced rfkill state to %d\n",
+		status);
 }
 
 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
@@ -3030,6 +3109,9 @@ static int bluetooth_set_radiosw(int radio_on, int update_rfk)
 	    && radio_on)
 		return -EPERM;
 
+	vdbg_printk(TPACPI_DBG_RFKILL,
+		"will %s bluetooth\n", radio_on ? "enable" : "disable");
+
 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 	if (dbg_bluetoothemul) {
 		tpacpi_bluetooth_emulstate = !!radio_on;
@@ -3060,6 +3142,8 @@ static ssize_t bluetooth_enable_show(struct device *dev,
 {
 	int status;
 
+	printk_deprecated_rfkill_attribute("bluetooth_enable");
+
 	status = bluetooth_get_radiosw();
 	if (status < 0)
 		return status;
@@ -3075,9 +3159,13 @@ static ssize_t bluetooth_enable_store(struct device *dev,
 	unsigned long t;
 	int res;
 
+	printk_deprecated_rfkill_attribute("bluetooth_enable");
+
 	if (parse_strtoul(buf, 1, &t))
 		return -EINVAL;
 
+	tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
+
 	res = bluetooth_set_radiosw(t, 1);
 
 	return (res) ? res : count;
@@ -3111,6 +3199,8 @@ static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
 
 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
 {
+	dbg_printk(TPACPI_DBG_RFKILL,
+		   "request to change radio state to %d\n", state);
 	return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
 }
 
@@ -3121,6 +3211,9 @@ static void bluetooth_shutdown(void)
 			TP_ACPI_BLTH_SAVE_STATE))
 		printk(TPACPI_NOTICE
 			"failed to save bluetooth state to NVRAM\n");
+	else
+		vdbg_printk(TPACPI_DBG_RFKILL,
+			"bluestooth state saved to NVRAM\n");
 }
 
 static void bluetooth_exit(void)
@@ -3139,7 +3232,8 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
 	int res;
 	int status = 0;
 
-	vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+			"initializing bluetooth subdriver\n");
 
 	TPACPI_ACPIHANDLE_INIT(hkey);
 
@@ -3148,7 +3242,8 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
 	tp_features.bluetooth = hkey_handle &&
 	    acpi_evalf(hkey_handle, &status, "GBDC", "qd");
 
-	vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+		"bluetooth is %s, status 0x%02x\n",
 		str_supported(tp_features.bluetooth),
 		status);
 
@@ -3163,7 +3258,7 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
 	    !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
 		/* no bluetooth hardware present in system */
 		tp_features.bluetooth = 0;
-		dbg_printk(TPACPI_DBG_INIT,
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
 			   "bluetooth hardware not installed\n");
 	}
 
@@ -3178,7 +3273,7 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
 	res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
 				&tpacpi_bluetooth_rfkill,
 				RFKILL_TYPE_BLUETOOTH,
-				"tpacpi_bluetooth_sw",
+				TPACPI_RFK_BLUETOOTH_SW_NAME,
 				true,
 				tpacpi_bluetooth_rfk_set,
 				tpacpi_bluetooth_rfk_get);
@@ -3211,19 +3306,27 @@ static int bluetooth_read(char *p)
 static int bluetooth_write(char *buf)
 {
 	char *cmd;
+	int state = -1;
 
 	if (!tp_features.bluetooth)
 		return -ENODEV;
 
 	while ((cmd = next_cmd(&buf))) {
 		if (strlencmp(cmd, "enable") == 0) {
-			bluetooth_set_radiosw(1, 1);
+			state = 1;
 		} else if (strlencmp(cmd, "disable") == 0) {
-			bluetooth_set_radiosw(0, 1);
+			state = 0;
 		} else
 			return -EINVAL;
 	}
 
+	if (state != -1) {
+		tpacpi_disclose_usertask("procfs bluetooth",
+			"attempt to %s\n",
+			state ? "enable" : "disable");
+		bluetooth_set_radiosw(state, 1);
+	}
+
 	return 0;
 }
 
@@ -3248,13 +3351,17 @@ enum {
 						   off / last state */
 };
 
+#define TPACPI_RFK_WWAN_SW_NAME		"tpacpi_wwan_sw"
+
 static struct rfkill *tpacpi_wan_rfkill;
 
 static void wan_suspend(pm_message_t state)
 {
 	/* Try to make sure radio will resume powered off */
-	acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
-		   TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
+	if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
+		   TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
+		vdbg_printk(TPACPI_DBG_RFKILL,
+			"WWAN power down on resume request failed\n");
 }
 
 static int wan_get_radiosw(void)
@@ -3292,6 +3399,10 @@ static void wan_update_rfk(void)
 	if (status < 0)
 		return;
 	rfkill_force_state(tpacpi_wan_rfkill, status);
+
+	vdbg_printk(TPACPI_DBG_RFKILL,
+		"forced rfkill state to %d\n",
+		status);
 }
 
 static int wan_set_radiosw(int radio_on, int update_rfk)
@@ -3307,6 +3418,9 @@ static int wan_set_radiosw(int radio_on, int update_rfk)
 	    && radio_on)
 		return -EPERM;
 
+	vdbg_printk(TPACPI_DBG_RFKILL,
+		"will %s WWAN\n", radio_on ? "enable" : "disable");
+
 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 	if (dbg_wwanemul) {
 		tpacpi_wwan_emulstate = !!radio_on;
@@ -3337,6 +3451,8 @@ static ssize_t wan_enable_show(struct device *dev,
 {
 	int status;
 
+	printk_deprecated_rfkill_attribute("wwan_enable");
+
 	status = wan_get_radiosw();
 	if (status < 0)
 		return status;
@@ -3352,9 +3468,13 @@ static ssize_t wan_enable_store(struct device *dev,
 	unsigned long t;
 	int res;
 
+	printk_deprecated_rfkill_attribute("wwan_enable");
+
 	if (parse_strtoul(buf, 1, &t))
 		return -EINVAL;
 
+	tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
+
 	res = wan_set_radiosw(t, 1);
 
 	return (res) ? res : count;
@@ -3388,6 +3508,8 @@ static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
 
 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
 {
+	dbg_printk(TPACPI_DBG_RFKILL,
+		   "request to change radio state to %d\n", state);
 	return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
 }
 
@@ -3398,6 +3520,9 @@ static void wan_shutdown(void)
 			TP_ACPI_WGSV_SAVE_STATE))
 		printk(TPACPI_NOTICE
 			"failed to save WWAN state to NVRAM\n");
+	else
+		vdbg_printk(TPACPI_DBG_RFKILL,
+			"WWAN state saved to NVRAM\n");
 }
 
 static void wan_exit(void)
@@ -3416,14 +3541,16 @@ static int __init wan_init(struct ibm_init_struct *iibm)
 	int res;
 	int status = 0;
 
-	vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+			"initializing wan subdriver\n");
 
 	TPACPI_ACPIHANDLE_INIT(hkey);
 
 	tp_features.wan = hkey_handle &&
 	    acpi_evalf(hkey_handle, &status, "GWAN", "qd");
 
-	vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+		"wan is %s, status 0x%02x\n",
 		str_supported(tp_features.wan),
 		status);
 
@@ -3438,7 +3565,7 @@ static int __init wan_init(struct ibm_init_struct *iibm)
 	    !(status & TP_ACPI_WANCARD_HWPRESENT)) {
 		/* no wan hardware present in system */
 		tp_features.wan = 0;
-		dbg_printk(TPACPI_DBG_INIT,
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
 			   "wan hardware not installed\n");
 	}
 
@@ -3453,7 +3580,7 @@ static int __init wan_init(struct ibm_init_struct *iibm)
 	res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
 				&tpacpi_wan_rfkill,
 				RFKILL_TYPE_WWAN,
-				"tpacpi_wwan_sw",
+				TPACPI_RFK_WWAN_SW_NAME,
 				true,
 				tpacpi_wan_rfk_set,
 				tpacpi_wan_rfk_get);
@@ -3471,6 +3598,8 @@ static int wan_read(char *p)
 	int len = 0;
 	int status = wan_get_radiosw();
 
+	tpacpi_disclose_usertask("procfs wan", "read");
+
 	if (!tp_features.wan)
 		len += sprintf(p + len, "status:\t\tnot supported\n");
 	else {
@@ -3486,19 +3615,27 @@ static int wan_read(char *p)
 static int wan_write(char *buf)
 {
 	char *cmd;
+	int state = -1;
 
 	if (!tp_features.wan)
 		return -ENODEV;
 
 	while ((cmd = next_cmd(&buf))) {
 		if (strlencmp(cmd, "enable") == 0) {
-			wan_set_radiosw(1, 1);
+			state = 1;
 		} else if (strlencmp(cmd, "disable") == 0) {
-			wan_set_radiosw(0, 1);
+			state = 0;
 		} else
 			return -EINVAL;
 	}
 
+	if (state != -1) {
+		tpacpi_disclose_usertask("procfs wan",
+			"attempt to %s\n",
+			state ? "enable" : "disable");
+		wan_set_radiosw(state, 1);
+	}
+
 	return 0;
 }
 
@@ -3521,6 +3658,8 @@ enum {
 	TP_ACPI_UWB_RADIOSSW	= 0x02,	/* UWB radio enabled */
 };
 
+#define TPACPI_RFK_UWB_SW_NAME	"tpacpi_uwb_sw"
+
 static struct rfkill *tpacpi_uwb_rfkill;
 
 static int uwb_get_radiosw(void)
@@ -3558,6 +3697,10 @@ static void uwb_update_rfk(void)
 	if (status < 0)
 		return;
 	rfkill_force_state(tpacpi_uwb_rfkill, status);
+
+	vdbg_printk(TPACPI_DBG_RFKILL,
+		"forced rfkill state to %d\n",
+		status);
 }
 
 static int uwb_set_radiosw(int radio_on, int update_rfk)
@@ -3573,6 +3716,9 @@ static int uwb_set_radiosw(int radio_on, int update_rfk)
 	    && radio_on)
 		return -EPERM;
 
+	vdbg_printk(TPACPI_DBG_RFKILL,
+			"will %s UWB\n", radio_on ? "enable" : "disable");
+
 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 	if (dbg_uwbemul) {
 		tpacpi_uwb_emulstate = !!radio_on;
@@ -3607,6 +3753,8 @@ static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
 
 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
 {
+	dbg_printk(TPACPI_DBG_RFKILL,
+		   "request to change radio state to %d\n", state);
 	return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
 }
 
@@ -3621,14 +3769,16 @@ static int __init uwb_init(struct ibm_init_struct *iibm)
 	int res;
 	int status = 0;
 
-	vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+			"initializing uwb subdriver\n");
 
 	TPACPI_ACPIHANDLE_INIT(hkey);
 
 	tp_features.uwb = hkey_handle &&
 	    acpi_evalf(hkey_handle, &status, "GUWB", "qd");
 
-	vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+		"uwb is %s, status 0x%02x\n",
 		str_supported(tp_features.uwb),
 		status);
 
@@ -3653,7 +3803,7 @@ static int __init uwb_init(struct ibm_init_struct *iibm)
 	res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
 				&tpacpi_uwb_rfkill,
 				RFKILL_TYPE_UWB,
-				"tpacpi_uwb_sw",
+				TPACPI_RFK_UWB_SW_NAME,
 				false,
 				tpacpi_uwb_rfk_set,
 				tpacpi_uwb_rfk_get);
@@ -4602,6 +4752,16 @@ static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
 	"tpacpi::unknown_led",
 	"tpacpi::standby",
 };
+#define TPACPI_SAFE_LEDS	0x0081U
+
+static inline bool tpacpi_is_led_restricted(const unsigned int led)
+{
+#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
+	return false;
+#else
+	return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
+#endif
+}
 
 static int led_get_status(const unsigned int led)
 {
@@ -4639,16 +4799,20 @@ static int led_set_status(const unsigned int led,
 	switch (led_supported) {
 	case TPACPI_LED_570:
 		/* 570 */
-		if (led > 7)
+		if (unlikely(led > 7))
 			return -EINVAL;
+		if (unlikely(tpacpi_is_led_restricted(led)))
+			return -EPERM;
 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
 				(1 << led), led_sled_arg1[ledstatus]))
 			rc = -EIO;
 		break;
 	case TPACPI_LED_OLD:
 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
-		if (led > 7)
+		if (unlikely(led > 7))
 			return -EINVAL;
+		if (unlikely(tpacpi_is_led_restricted(led)))
+			return -EPERM;
 		rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
 		if (rc >= 0)
 			rc = ec_write(TPACPI_LED_EC_HLBL,
@@ -4659,6 +4823,10 @@ static int led_set_status(const unsigned int led,
 		break;
 	case TPACPI_LED_NEW:
 		/* all others */
+		if (unlikely(led >= TPACPI_LED_NUMLEDS))
+			return -EINVAL;
+		if (unlikely(tpacpi_is_led_restricted(led)))
+			return -EPERM;
 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
 				led, led_led_arg1[ledstatus]))
 			rc = -EIO;
@@ -4751,6 +4919,30 @@ static void led_exit(void)
 	kfree(tpacpi_leds);
 }
 
+static int __init tpacpi_init_led(unsigned int led)
+{
+	int rc;
+
+	tpacpi_leds[led].led = led;
+
+	tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
+	tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
+	if (led_supported == TPACPI_LED_570)
+		tpacpi_leds[led].led_classdev.brightness_get =
+						&led_sysfs_get;
+
+	tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
+
+	INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
+
+	rc = led_classdev_register(&tpacpi_pdev->dev,
+				&tpacpi_leds[led].led_classdev);
+	if (rc < 0)
+		tpacpi_leds[led].led_classdev.name = NULL;
+
+	return rc;
+}
+
 static int __init led_init(struct ibm_init_struct *iibm)
 {
 	unsigned int i;
@@ -4784,27 +4976,21 @@ static int __init led_init(struct ibm_init_struct *iibm)
 	}
 
 	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;
+		if (!tpacpi_is_led_restricted(i)) {
+			rc = tpacpi_init_led(i);
+			if (rc < 0) {
+				led_exit();
+				return rc;
+			}
 		}
 	}
 
+#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
+	if (led_supported != TPACPI_LED_NONE)
+		printk(TPACPI_NOTICE
+			"warning: userspace override of important "
+			"firmware LEDs is enabled\n");
+#endif
 	return (led_supported != TPACPI_LED_NONE)? 0 : 1;
 }
 
@@ -5340,6 +5526,20 @@ static struct ibm_struct ecdump_driver_data = {
 
 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
 
+/*
+ * ThinkPads can read brightness from two places: EC HBRV (0x31), or
+ * CMOS NVRAM byte 0x5E, bits 0-3.
+ *
+ * EC HBRV (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 HBRV layout
+ */
+
 enum {
 	TP_EC_BACKLIGHT = 0x31,
 
@@ -5349,108 +5549,164 @@ enum {
 	TP_EC_BACKLIGHT_MAPSW = 0x20,
 };
 
+enum tpacpi_brightness_access_mode {
+	TPACPI_BRGHT_MODE_AUTO = 0,	/* Not implemented yet */
+	TPACPI_BRGHT_MODE_EC,		/* EC control */
+	TPACPI_BRGHT_MODE_UCMS_STEP,	/* UCMS step-based control */
+	TPACPI_BRGHT_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
+	TPACPI_BRGHT_MODE_MAX
+};
+
 static struct backlight_device *ibm_backlight_device;
-static int brightness_mode;
+
+static enum tpacpi_brightness_access_mode brightness_mode =
+		TPACPI_BRGHT_MODE_MAX;
+
 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
 
 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_raw(int *status)
+/* NVRAM brightness access,
+ * call with brightness_mutex held! */
+static unsigned int tpacpi_brightness_nvram_get(void)
 {
-	u8 lec = 0, lcmos = 0, level = 0;
+	u8 lnvram;
 
-	if (brightness_mode & 1) {
-		if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
-			return -EIO;
-		level = lec & TP_EC_BACKLIGHT_LVLMSK;
-	};
-	if (brightness_mode & 2) {
-		lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
-			 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
-			>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
-		lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
-		level = lcmos;
-	}
-
-	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 {
-			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;
-			}
+	lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
+		  & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
+		  >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
+	lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
+
+	return lnvram;
+}
+
+static void tpacpi_brightness_checkpoint_nvram(void)
+{
+	u8 lec = 0;
+	u8 b_nvram;
+
+	if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
+		return;
+
+	vdbg_printk(TPACPI_DBG_BRGHT,
+		"trying to checkpoint backlight level to NVRAM...\n");
+
+	if (mutex_lock_killable(&brightness_mutex) < 0)
+		return;
+
+	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
+		goto unlock;
+	lec &= TP_EC_BACKLIGHT_LVLMSK;
+	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
+
+	if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
+			     >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
+		/* NVRAM needs update */
+		b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
+				TP_NVRAM_POS_LEVEL_BRIGHTNESS);
+		b_nvram |= lec;
+		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
+		dbg_printk(TPACPI_DBG_BRGHT,
+			   "updated NVRAM backlight level to %u (0x%02x)\n",
+			   (unsigned int) lec, (unsigned int) b_nvram);
+	} else
+		vdbg_printk(TPACPI_DBG_BRGHT,
+			   "NVRAM backlight level already is %u (0x%02x)\n",
+			   (unsigned int) lec, (unsigned int) b_nvram);
+
+unlock:
+	mutex_unlock(&brightness_mutex);
+}
+
+
+/* call with brightness_mutex held! */
+static int tpacpi_brightness_get_raw(int *status)
+{
+	u8 lec = 0;
+
+	switch (brightness_mode) {
+	case TPACPI_BRGHT_MODE_UCMS_STEP:
+		*status = tpacpi_brightness_nvram_get();
+		return 0;
+	case TPACPI_BRGHT_MODE_EC:
+	case TPACPI_BRGHT_MODE_ECNVRAM:
+		if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
 			return -EIO;
-		}
-	} else {
-		*status = level;
+		*status = lec;
+		return 0;
+	default:
+		return -ENXIO;
 	}
+}
+
+/* call with brightness_mutex held! */
+/* do NOT call with illegal backlight level value */
+static int tpacpi_brightness_set_ec(unsigned int value)
+{
+	u8 lec = 0;
+
+	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
+		return -EIO;
+
+	if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
+				(lec & TP_EC_BACKLIGHT_CMDMSK) |
+				(value & TP_EC_BACKLIGHT_LVLMSK))))
+		return -EIO;
+
+	return 0;
+}
+
+/* call with brightness_mutex held! */
+static int tpacpi_brightness_set_ucmsstep(unsigned int value)
+{
+	int cmos_cmd, inc;
+	unsigned int current_value, i;
+
+	current_value = tpacpi_brightness_nvram_get();
+
+	if (value == current_value)
+		return 0;
+
+	cmos_cmd = (value > current_value) ?
+			TP_CMOS_BRIGHTNESS_UP :
+			TP_CMOS_BRIGHTNESS_DOWN;
+	inc = (value > current_value) ? 1 : -1;
+
+	for (i = current_value; i != value; i += inc)
+		if (issue_thinkpad_cmos_command(cmos_cmd))
+			return -EIO;
 
 	return 0;
 }
 
 /* May return EINTR which can always be mapped to ERESTARTSYS */
-static int brightness_set(int value)
+static int brightness_set(unsigned int value)
 {
-	int cmos_cmd, inc, i, res;
-	int current_value;
-	int command_bits;
+	int res;
 
 	if (value > ((tp_features.bright_16levels)? 15 : 7) ||
 	    value < 0)
 		return -EINVAL;
 
+	vdbg_printk(TPACPI_DBG_BRGHT,
+			"set backlight level to %d\n", value);
+
 	res = mutex_lock_killable(&brightness_mutex);
 	if (res < 0)
 		return res;
 
-	res = brightness_get_raw(&current_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 :
-			TP_CMOS_BRIGHTNESS_DOWN;
-	inc = (value > current_value)? 1 : -1;
-
-	res = 0;
-	for (i = current_value; i != value; i += inc) {
-		if ((brightness_mode & 2) &&
-		    issue_thinkpad_cmos_command(cmos_cmd)) {
-			res = -EIO;
-			goto errout;
-		}
-		if ((brightness_mode & 1) &&
-		    !acpi_ec_write(TP_EC_BACKLIGHT,
-				   (i + inc) | command_bits)) {
-			res = -EIO;
-			goto errout;;
-		}
+	switch (brightness_mode) {
+	case TPACPI_BRGHT_MODE_EC:
+	case TPACPI_BRGHT_MODE_ECNVRAM:
+		res = tpacpi_brightness_set_ec(value);
+		break;
+	case TPACPI_BRGHT_MODE_UCMS_STEP:
+		res = tpacpi_brightness_set_ucmsstep(value);
+		break;
+	default:
+		res = -ENXIO;
 	}
 
-errout:
 	mutex_unlock(&brightness_mutex);
 	return res;
 }
@@ -5459,21 +5715,34 @@ errout:
 
 static int brightness_update_status(struct backlight_device *bd)
 {
-	/* it is the backlight class's job (caller) to handle
-	 * EINTR and other errors properly */
-	return brightness_set(
+	unsigned int level =
 		(bd->props.fb_blank == FB_BLANK_UNBLANK &&
 		 bd->props.power == FB_BLANK_UNBLANK) ?
-				bd->props.brightness : 0);
+				bd->props.brightness : 0;
+
+	dbg_printk(TPACPI_DBG_BRGHT,
+			"backlight: attempt to set level to %d\n",
+			level);
+
+	/* it is the backlight class's job (caller) to handle
+	 * EINTR and other errors properly */
+	return brightness_set(level);
 }
 
 static int brightness_get(struct backlight_device *bd)
 {
 	int status, res;
 
-	res = brightness_get_raw(&status);
+	res = mutex_lock_killable(&brightness_mutex);
 	if (res < 0)
-		return 0; /* FIXME: teach backlight about error handling */
+		return 0;
+
+	res = tpacpi_brightness_get_raw(&status);
+
+	mutex_unlock(&brightness_mutex);
+
+	if (res < 0)
+		return 0;
 
 	return status & TP_EC_BACKLIGHT_LVLMSK;
 }
@@ -5523,7 +5792,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 	}
 
 	if (!brightness_enable) {
-		dbg_printk(TPACPI_DBG_INIT,
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
 			   "brightness support disabled by "
 			   "module parameter\n");
 		return 1;
@@ -5538,20 +5807,38 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 	if (b == 16)
 		tp_features.bright_16levels = 1;
 
-	if (!brightness_mode) {
-		if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
-			brightness_mode = 2;
-		else
-			brightness_mode = 3;
+	/*
+	 * Check for module parameter bogosity, note that we
+	 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
+	 * able to detect "unspecified"
+	 */
+	if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
+		return -EINVAL;
 
-		dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
-			brightness_mode);
-	}
+	/* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
+	if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
+	    brightness_mode == TPACPI_BRGHT_MODE_MAX) {
+		if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
+			/*
+			 * IBM models that define HBRV probably have
+			 * EC-based backlight level control
+			 */
+			if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
+				/* T40-T43, R50-R52, R50e, R51e, X31-X41 */
+				brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
+			else
+				/* all other IBM ThinkPads */
+				brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
+		} else
+			/* All Lenovo ThinkPads */
+			brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
 
-	if (brightness_mode > 3)
-		return -EINVAL;
+		dbg_printk(TPACPI_DBG_BRGHT,
+			   "selected brightness_mode=%d\n",
+			   brightness_mode);
+	}
 
-	if (brightness_get_raw(&b) < 0)
+	if (tpacpi_brightness_get_raw(&b) < 0)
 		return 1;
 
 	if (tp_features.bright_16levels)
@@ -5565,7 +5852,8 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 		printk(TPACPI_ERR "Could not register backlight device\n");
 		return PTR_ERR(ibm_backlight_device);
 	}
-	vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
+			"brightness is supported\n");
 
 	ibm_backlight_device->props.max_brightness =
 				(tp_features.bright_16levels)? 15 : 7;
@@ -5575,13 +5863,25 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 	return 0;
 }
 
+static void brightness_suspend(pm_message_t state)
+{
+	tpacpi_brightness_checkpoint_nvram();
+}
+
+static void brightness_shutdown(void)
+{
+	tpacpi_brightness_checkpoint_nvram();
+}
+
 static void brightness_exit(void)
 {
 	if (ibm_backlight_device) {
-		vdbg_printk(TPACPI_DBG_EXIT,
+		vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
 			    "calling backlight_device_unregister()\n");
 		backlight_device_unregister(ibm_backlight_device);
 	}
+
+	tpacpi_brightness_checkpoint_nvram();
 }
 
 static int brightness_read(char *p)
@@ -5628,6 +5928,9 @@ static int brightness_write(char *buf)
 			return -EINVAL;
 	}
 
+	tpacpi_disclose_usertask("procfs brightness",
+			"set level to %d\n", level);
+
 	/*
 	 * Now we know what the final level should be, so we try to set it.
 	 * Doing it this way makes the syscall restartable in case of EINTR
@@ -5641,6 +5944,8 @@ static struct ibm_struct brightness_driver_data = {
 	.read = brightness_read,
 	.write = brightness_write,
 	.exit = brightness_exit,
+	.suspend = brightness_suspend,
+	.shutdown = brightness_shutdown,
 };
 
 /*************************************************************************
@@ -6086,6 +6391,9 @@ static int fan_set_level(int level)
 	default:
 		return -ENXIO;
 	}
+
+	vdbg_printk(TPACPI_DBG_FAN,
+		"fan control: set fan control register to 0x%02x\n", level);
 	return 0;
 }
 
@@ -6163,6 +6471,11 @@ static int fan_set_enable(void)
 	}
 
 	mutex_unlock(&fan_mutex);
+
+	if (!rc)
+		vdbg_printk(TPACPI_DBG_FAN,
+			"fan control: set fan control register to 0x%02x\n",
+			s);
 	return rc;
 }
 
@@ -6199,6 +6512,9 @@ static int fan_set_disable(void)
 		rc = -ENXIO;
 	}
 
+	if (!rc)
+		vdbg_printk(TPACPI_DBG_FAN,
+			"fan control: set fan control register to 0\n");
 
 	mutex_unlock(&fan_mutex);
 	return rc;
@@ -6327,6 +6643,9 @@ static ssize_t fan_pwm1_enable_store(struct device *dev,
 	if (parse_strtoul(buf, 2, &t))
 		return -EINVAL;
 
+	tpacpi_disclose_usertask("hwmon pwm1_enable",
+			"set fan mode to %lu\n", t);
+
 	switch (t) {
 	case 0:
 		level = TP_EC_FAN_FULLSPEED;
@@ -6392,6 +6711,9 @@ static ssize_t fan_pwm1_store(struct device *dev,
 	if (parse_strtoul(buf, 255, &s))
 		return -EINVAL;
 
+	tpacpi_disclose_usertask("hwmon pwm1",
+			"set fan speed to %lu\n", s);
+
 	/* scale down from 0-255 to 0-7 */
 	newlevel = (s >> 5) & 0x07;
 
@@ -6458,6 +6780,8 @@ static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
 	fan_watchdog_maxinterval = t;
 	fan_watchdog_reset();
 
+	tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
+
 	return count;
 }
 
@@ -6479,7 +6803,8 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 {
 	int rc;
 
-	vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
+			"initializing fan subdriver\n");
 
 	mutex_init(&fan_mutex);
 	fan_status_access_mode = TPACPI_FAN_NONE;
@@ -6538,7 +6863,8 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 		}
 	}
 
-	vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
+		"fan is %s, modes %d, %d\n",
 		str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
 		  fan_control_access_mode != TPACPI_FAN_WR_NONE),
 		fan_status_access_mode, fan_control_access_mode);
@@ -6547,7 +6873,7 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 	if (!fan_control_allowed) {
 		fan_control_access_mode = TPACPI_FAN_WR_NONE;
 		fan_control_commands = 0;
-		dbg_printk(TPACPI_DBG_INIT,
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
 			   "fan control features disabled by parameter\n");
 	}
 
@@ -6576,7 +6902,7 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 
 static void fan_exit(void)
 {
-	vdbg_printk(TPACPI_DBG_EXIT,
+	vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
 		    "cancelling any pending fan watchdog tasks\n");
 
 	/* FIXME: can we really do this unconditionally? */
@@ -6757,6 +7083,9 @@ static int fan_write_cmd_level(const char *cmd, int *rc)
 	if (*rc == -ENXIO)
 		printk(TPACPI_ERR "level command accepted for unsupported "
 		       "access mode %d", fan_control_access_mode);
+	else if (!*rc)
+		tpacpi_disclose_usertask("procfs fan",
+			"set level to %d\n", level);
 
 	return 1;
 }
@@ -6770,6 +7099,8 @@ static int fan_write_cmd_enable(const char *cmd, int *rc)
 	if (*rc == -ENXIO)
 		printk(TPACPI_ERR "enable command accepted for unsupported "
 		       "access mode %d", fan_control_access_mode);
+	else if (!*rc)
+		tpacpi_disclose_usertask("procfs fan", "enable\n");
 
 	return 1;
 }
@@ -6783,6 +7114,8 @@ static int fan_write_cmd_disable(const char *cmd, int *rc)
 	if (*rc == -ENXIO)
 		printk(TPACPI_ERR "disable command accepted for unsupported "
 		       "access mode %d", fan_control_access_mode);
+	else if (!*rc)
+		tpacpi_disclose_usertask("procfs fan", "disable\n");
 
 	return 1;
 }
@@ -6801,6 +7134,9 @@ static int fan_write_cmd_speed(const char *cmd, int *rc)
 	if (*rc == -ENXIO)
 		printk(TPACPI_ERR "speed command accepted for unsupported "
 		       "access mode %d", fan_control_access_mode);
+	else if (!*rc)
+		tpacpi_disclose_usertask("procfs fan",
+			"set speed to %d\n", speed);
 
 	return 1;
 }
@@ -6814,8 +7150,12 @@ static int fan_write_cmd_watchdog(const char *cmd, int *rc)
 
 	if (interval < 0 || interval > 120)
 		*rc = -EINVAL;
-	else
+	else {
 		fan_watchdog_maxinterval = interval;
+		tpacpi_disclose_usertask("procfs fan",
+			"set watchdog timer to %d\n",
+			interval);
+	}
 
 	return 1;
 }
@@ -7244,10 +7584,10 @@ module_param_named(fan_control, fan_control_allowed, bool, 0);
 MODULE_PARM_DESC(fan_control,
 		 "Enables setting fan parameters features when true");
 
-module_param_named(brightness_mode, brightness_mode, int, 0);
+module_param_named(brightness_mode, brightness_mode, uint, 0);
 MODULE_PARM_DESC(brightness_mode,
 		 "Selects brightness control strategy: "
-		 "0=auto, 1=EC, 2=CMOS, 3=both");
+		 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
 
 module_param(brightness_enable, uint, 0);
 MODULE_PARM_DESC(brightness_enable,
@@ -7517,9 +7857,6 @@ static int __init thinkpad_acpi_module_init(void)
 	return 0;
 }
 
-/* Please remove this in year 2009 */
-MODULE_ALIAS("ibm_acpi");
-
 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
 
 /*