Patchwork [1/2] UBUNTU: SAUCE: Pull in latest thinkpad-acpi

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Submitter Stefan Bader
Date March 31, 2010, 8:39 a.m.
Message ID <1270024765-23771-2-git-send-email-stefan.bader@canonical.com>
Download mbox | patch
Permalink /patch/49103/
State Accepted
Delegated to: Andy Whitcroft
Headers show

Comments

Stefan Bader - March 31, 2010, 8:39 a.m.
BugLink: http://bugs.launchpad.net/bugs/357673

This is a backport of the current upstream thinkpad-acpi driver to Lucid
as one patch. It consists of the following changes (compared to the stable
version we have):

88cc83772a3c7756b9f2b4ba835545ad90a08409 thinkpad-acpi: fix ALSA callback return status
b525c06cdbd8a3963f0173ccd23f9147d4c384b5 thinkpad-acpi: lock down video output state access
ff850c339a1a6a7724537160c73cdc09a483fc5d thinkpad-acpi: make volume subdriver optional
74c75c1848b618f6717c1be887ad539ffac2e96d thinkpad-acpi: don't fail to load the entire module due to ALSA problems
ead510cebcdf41c92fce2a909f342255b028a33d thinkpad-acpi: don't take the first ALSA slot by default
5d2eb14d36723eba0b31ae208bc346835751e944 thinkpad-acpi: bump version to 0.24
887965e6576a78f71b9b98dec43fd1c73becd2e8 thinkpad-acpi: convert to seq_file
0d204c34e85d1d63e5fdd3e3192747daf0ee7ec1 thinkpad-acpi: basic ALSA mixer support (v2)
c7ac6291ea7ebc568a1fce16fed87d102898f264 thinkpad-acpi: disable volume control
a112ceee673629afc204bf6b4a4828a6143a083f thinkpad-acpi: support MUTE-only ThinkPads
329e4e18dfdc552f36b0642a3de5ebfa96063666 thinkpad-acpi: volume subdriver rewrite
5451a923bbdcff6ae665947e120af7238b21a9d2 thinkpad-acpi: log initial state of rfkill switches
d89a727aff649f6768f7a34ee57f031ebf8bab4c thinkpad-acpi: sync input device EV_SW initial state
792979c8032b8f5adb77ea986db7082fff04c8e7 thinkpad-acpi: use input_set_capability
9ebd9e833648745fa5ac6998b9e0153ccd3ba839 thinkpad-acpi: log temperatures on termal alarm (v2)
b09c72259e88cec3d602aef987a3209297f3a9c2 thinkpad-acpi: expose module parameters
d112ef95d4ec1ee7fe7123e3f21e4aac0d57570c thinkpad-acpi: adopt input device
6b30eb7d211840ba1a03f855d9e7b80a921368f2 thinkpad-acpi: silence bogus complain during rmmod
347a26860e2293b1347996876d3550499c7bb31f thinkpad-acpi: issue backlight class events
90765c6aee568137521ba19347c744b5abde8161 thinkpad-acpi: fix some version quirks

Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
---
 drivers/platform/x86/Kconfig         |   23 +
 drivers/platform/x86/thinkpad_acpi.c | 1217 ++++++++++++++++++++++++++-------
 2 files changed, 982 insertions(+), 258 deletions(-)

Patch

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 55ca39d..6404091 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -233,6 +233,29 @@  config THINKPAD_ACPI
 
 	  If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.
 
+config THINKPAD_ACPI_ALSA_SUPPORT
+	bool "Console audio control ALSA interface"
+	depends on THINKPAD_ACPI
+	depends on SND
+	depends on SND = y || THINKPAD_ACPI = SND
+	default y
+	---help---
+	  Enables monitoring of the built-in console audio output control
+	  (headphone and speakers), which is operated by the mute and (in
+	  some ThinkPad models) volume hotkeys.
+
+	  If this option is enabled, ThinkPad-ACPI will export an ALSA card
+	  with a single read-only mixer control, which should be used for
+	  on-screen-display feedback purposes by the Desktop Environment.
+
+	  Optionally, the driver will also allow software control (the
+	  ALSA mixer will be made read-write).  Please refer to the driver
+	  documentation for details.
+
+	  All IBM models have both volume and mute control.  Newer Lenovo
+	  models only have mute control (the volume hotkeys are just normal
+	  keys and volume control is done through the main HDA mixer).
+
 config THINKPAD_ACPI_DEBUGFACILITIES
 	bool "Maintainer debug facilities"
 	depends on THINKPAD_ACPI
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index fa0a0d3..9bb245b 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -21,8 +21,8 @@ 
  *  02110-1301, USA.
  */
 
-#define TPACPI_VERSION "0.23"
-#define TPACPI_SYSFS_VERSION 0x020500
+#define TPACPI_VERSION "0.24"
+#define TPACPI_SYSFS_VERSION 0x020700
 
 /*
  *  Changelog:
@@ -61,6 +61,7 @@ 
 
 #include <linux/nvram.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/sysfs.h>
 #include <linux/backlight.h>
 #include <linux/fb.h>
@@ -76,6 +77,10 @@ 
 #include <linux/jiffies.h>
 #include <linux/workqueue.h>
 
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+
 #include <acpi/acpi_drivers.h>
 
 #include <linux/pci_ids.h>
@@ -231,6 +236,7 @@  enum tpacpi_hkey_event_t {
 #define TPACPI_DBG_HKEY		0x0008
 #define TPACPI_DBG_FAN		0x0010
 #define TPACPI_DBG_BRGHT	0x0020
+#define TPACPI_DBG_MIXER	0x0040
 
 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
@@ -256,7 +262,7 @@  struct tp_acpi_drv_struct {
 struct ibm_struct {
 	char *name;
 
-	int (*read) (char *);
+	int (*read) (struct seq_file *);
 	int (*write) (char *);
 	void (*exit) (void);
 	void (*resume) (void);
@@ -280,6 +286,7 @@  struct ibm_init_struct {
 	char param[32];
 
 	int (*init) (struct ibm_init_struct *);
+	mode_t base_procfs_mode;
 	struct ibm_struct *data;
 };
 
@@ -298,6 +305,7 @@  static struct {
 	u32 fan_ctrl_status_undef:1;
 	u32 second_fan:1;
 	u32 beep_needs_two_args:1;
+	u32 mixer_no_level_control:1;
 	u32 input_device_registered:1;
 	u32 platform_drv_registered:1;
 	u32 platform_drv_attrs_registered:1;
@@ -309,6 +317,7 @@  static struct {
 
 static struct {
 	u16 hotkey_mask_ff:1;
+	u16 volume_ctrl_forbidden:1;
 } tp_warned;
 
 struct thinkpad_id_data {
@@ -425,6 +434,12 @@  static void tpacpi_log_usertask(const char * const what)
 	  .ec = TPACPI_MATCH_ANY,		\
 	  .quirks = (__quirk) }
 
+#define TPACPI_QEC_LNV(__id1, __id2, __quirk)	\
+	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
+	  .bios = TPACPI_MATCH_ANY,		\
+	  .ec = TPID(__id1, __id2),		\
+	  .quirks = (__quirk) }
+
 struct tpacpi_quirk {
 	unsigned int vendor;
 	u16 bios;
@@ -776,36 +791,25 @@  static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
  ****************************************************************************
  ****************************************************************************/
 
-static int dispatch_procfs_read(char *page, char **start, off_t off,
-			int count, int *eof, void *data)
+static int dispatch_proc_show(struct seq_file *m, void *v)
 {
-	struct ibm_struct *ibm = data;
-	int len;
+	struct ibm_struct *ibm = m->private;
 
 	if (!ibm || !ibm->read)
 		return -EINVAL;
+	return ibm->read(m);
+}
 
-	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_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, dispatch_proc_show, PDE(inode)->data);
 }
 
-static int dispatch_procfs_write(struct file *file,
+static ssize_t dispatch_proc_write(struct file *file,
 			const char __user *userbuf,
-			unsigned long count, void *data)
+			size_t count, loff_t *pos)
 {
-	struct ibm_struct *ibm = data;
+	struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
 	char *kernbuf;
 	int ret;
 
@@ -834,6 +838,15 @@  static int dispatch_procfs_write(struct file *file,
 	return ret;
 }
 
+static const struct file_operations dispatch_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= dispatch_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= dispatch_proc_write,
+};
+
 static char *next_cmd(char **cmds)
 {
 	char *start = *cmds;
@@ -1264,6 +1277,7 @@  static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
 	struct tpacpi_rfk *atp_rfk;
 	int res;
 	bool sw_state = false;
+	bool hw_state;
 	int sw_status;
 
 	BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
@@ -1298,7 +1312,8 @@  static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
 			rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
 		}
 	}
-	rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
+	hw_state = tpacpi_rfk_check_hwblock_state();
+	rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
 
 	res = rfkill_register(atp_rfk->rfkill);
 	if (res < 0) {
@@ -1311,6 +1326,9 @@  static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
 	}
 
 	tpacpi_rfkill_switches[id] = atp_rfk;
+
+	printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
+		name, (sw_state || hw_state) ? "" : "un");
 	return 0;
 }
 
@@ -1383,12 +1401,10 @@  static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
 }
 
 /* procfs -------------------------------------------------------------- */
-static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
+static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
 {
-	int len = 0;
-
 	if (id >= TPACPI_RFK_SW_MAX)
-		len += sprintf(p + len, "status:\t\tnot supported\n");
+		seq_printf(m, "status:\t\tnot supported\n");
 	else {
 		int status;
 
@@ -1402,13 +1418,13 @@  static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
 				return status;
 		}
 
-		len += sprintf(p + len, "status:\t\t%s\n",
+		seq_printf(m, "status:\t\t%s\n",
 				(status == TPACPI_RFK_RADIO_ON) ?
 					"enabled" : "disabled");
-		len += sprintf(p + len, "commands:\tenable, disable\n");
+		seq_printf(m, "commands:\tenable, disable\n");
 	}
 
-	return len;
+	return 0;
 }
 
 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
@@ -1655,7 +1671,7 @@  static void tpacpi_remove_driver_attributes(struct device_driver *drv)
  * Table of recommended minimum BIOS versions
  *
  * Reasons for listing:
- *    1. Stable BIOS, listed because the unknown ammount of
+ *    1. Stable BIOS, listed because the unknown amount of
  *       bugs and bad ACPI behaviour on older versions
  *
  *    2. BIOS or EC fw with known bugs that trigger on Linux
@@ -1779,7 +1795,7 @@  static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
 
 	TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
 	TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
-	TPV_QL0('7', 'E',  'D', '0'),		 /* R60e, R60i */
+	TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
 
 	/*      BIOS FW    BIOS VERS  EC FW     EC VERS */
 	TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
@@ -1795,8 +1811,8 @@  static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
 	TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
 	TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
 
-	TPV_QL0('7', 'B',  'D', '7'),		 /* X60/s */
-	TPV_QL0('7', 'J',  '3', '0'),		 /* X60t */
+	TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
+	TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
 
 	/* (0) - older versions lack DMI EC fw string and functionality */
 	/* (1) - older versions known to lack functionality */
@@ -1886,14 +1902,11 @@  static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 	return 0;
 }
 
-static int thinkpad_acpi_driver_read(char *p)
+static int thinkpad_acpi_driver_read(struct seq_file *m)
 {
-	int len = 0;
-
-	len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
-	len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
-
-	return len;
+	seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
+	seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
+	return 0;
 }
 
 static struct ibm_struct thinkpad_acpi_driver_data = {
@@ -2190,7 +2203,8 @@  static int hotkey_mask_set(u32 mask)
 		       fwmask, hotkey_acpi_mask);
 	}
 
-	hotkey_mask_warn_incomplete_mask();
+	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
+		hotkey_mask_warn_incomplete_mask();
 
 	return rc;
 }
@@ -3187,6 +3201,8 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 	int res, i;
 	int status;
 	int hkeyv;
+	bool radiosw_state  = false;
+	bool tabletsw_state = false;
 
 	unsigned long quirks;
 
@@ -3292,6 +3308,7 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 	if (dbg_wlswemul) {
 		tp_features.hotkey_wlsw = 1;
+		radiosw_state = !!tpacpi_wlsw_emulstate;
 		printk(TPACPI_INFO
 			"radio switch emulation enabled\n");
 	} else
@@ -3299,6 +3316,7 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 	/* Not all thinkpads have a hardware radio switch */
 	if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
 		tp_features.hotkey_wlsw = 1;
+		radiosw_state = !!status;
 		printk(TPACPI_INFO
 			"radio switch found; radios are %s\n",
 			enabled(status, 0));
@@ -3310,11 +3328,11 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 	/* For X41t, X60t, X61t Tablets... */
 	if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
 		tp_features.hotkey_tablet = 1;
+		tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
 		printk(TPACPI_INFO
 			"possible tablet mode switch found; "
 			"ThinkPad in %s mode\n",
-			(status & TP_HOTKEY_TABLET_MASK)?
-				"tablet" : "laptop");
+			(tabletsw_state) ? "tablet" : "laptop");
 		res = add_to_attr_set(hotkey_dev_attributes,
 				&dev_attr_hotkey_tablet_mode.attr);
 	}
@@ -3349,16 +3367,14 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 			TPACPI_HOTKEY_MAP_SIZE);
 	}
 
-	set_bit(EV_KEY, tpacpi_inputdev->evbit);
-	set_bit(EV_MSC, tpacpi_inputdev->evbit);
-	set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
+	input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
 	tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
 	tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
 	tpacpi_inputdev->keycode = hotkey_keycode_map;
 	for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
 		if (hotkey_keycode_map[i] != KEY_RESERVED) {
-			set_bit(hotkey_keycode_map[i],
-				tpacpi_inputdev->keybit);
+			input_set_capability(tpacpi_inputdev, EV_KEY,
+						hotkey_keycode_map[i]);
 		} else {
 			if (i < sizeof(hotkey_reserved_mask)*8)
 				hotkey_reserved_mask |= 1 << i;
@@ -3366,12 +3382,14 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 	}
 
 	if (tp_features.hotkey_wlsw) {
-		set_bit(EV_SW, tpacpi_inputdev->evbit);
-		set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
+		input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
+		input_report_switch(tpacpi_inputdev,
+				    SW_RFKILL_ALL, radiosw_state);
 	}
 	if (tp_features.hotkey_tablet) {
-		set_bit(EV_SW, tpacpi_inputdev->evbit);
-		set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
+		input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
+		input_report_switch(tpacpi_inputdev,
+				    SW_TABLET_MODE, tabletsw_state);
 	}
 
 	/* Do not issue duplicate brightness change events to
@@ -3438,8 +3456,6 @@  static int __init hotkey_init(struct ibm_init_struct *iibm)
 	tpacpi_inputdev->close = &hotkey_inputdev_close;
 
 	hotkey_poll_setup_safe(true);
-	tpacpi_send_radiosw_update();
-	tpacpi_input_send_tabletsw();
 
 	return 0;
 
@@ -3547,49 +3563,57 @@  static bool hotkey_notify_usrevent(const u32 hkey,
 	}
 }
 
+static void thermal_dump_all_sensors(void);
+
 static bool hotkey_notify_thermal(const u32 hkey,
 				 bool *send_acpi_ev,
 				 bool *ignore_acpi_ev)
 {
+	bool known = true;
+
 	/* 0x6000-0x6FFF: thermal alarms */
 	*send_acpi_ev = true;
 	*ignore_acpi_ev = false;
 
 	switch (hkey) {
+	case TP_HKEY_EV_THM_TABLE_CHANGED:
+		printk(TPACPI_INFO
+			"EC reports that Thermal Table has changed\n");
+		/* recommended action: do nothing, we don't have
+		 * Lenovo ATM information */
+		return true;
 	case TP_HKEY_EV_ALARM_BAT_HOT:
 		printk(TPACPI_CRIT
 			"THERMAL ALARM: battery is too hot!\n");
 		/* recommended action: warn user through gui */
-		return true;
+		break;
 	case TP_HKEY_EV_ALARM_BAT_XHOT:
 		printk(TPACPI_ALERT
 			"THERMAL EMERGENCY: battery is extremely hot!\n");
 		/* recommended action: immediate sleep/hibernate */
-		return true;
+		break;
 	case TP_HKEY_EV_ALARM_SENSOR_HOT:
 		printk(TPACPI_CRIT
 			"THERMAL ALARM: "
 			"a sensor reports something is too hot!\n");
 		/* recommended action: warn user through gui, that */
 		/* some internal component is too hot */
-		return true;
+		break;
 	case TP_HKEY_EV_ALARM_SENSOR_XHOT:
 		printk(TPACPI_ALERT
 			"THERMAL EMERGENCY: "
 			"a sensor reports something is extremely hot!\n");
 		/* recommended action: immediate sleep/hibernate */
-		return true;
-	case TP_HKEY_EV_THM_TABLE_CHANGED:
-		printk(TPACPI_INFO
-			"EC reports that Thermal Table has changed\n");
-		/* recommended action: do nothing, we don't have
-		 * Lenovo ATM information */
-		return true;
+		break;
 	default:
 		printk(TPACPI_ALERT
 			 "THERMAL ALERT: unknown thermal alarm received\n");
-		return false;
+		known = false;
 	}
+
+	thermal_dump_all_sensors();
+
+	return known;
 }
 
 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
@@ -3738,14 +3762,13 @@  static void hotkey_resume(void)
 }
 
 /* procfs -------------------------------------------------------------- */
-static int hotkey_read(char *p)
+static int hotkey_read(struct seq_file *m)
 {
 	int res, status;
-	int len = 0;
 
 	if (!tp_features.hotkey) {
-		len += sprintf(p + len, "status:\t\tnot supported\n");
-		return len;
+		seq_printf(m, "status:\t\tnot supported\n");
+		return 0;
 	}
 
 	if (mutex_lock_killable(&hotkey_mutex))
@@ -3757,17 +3780,16 @@  static int hotkey_read(char *p)
 	if (res)
 		return res;
 
-	len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
+	seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
 	if (hotkey_all_mask) {
-		len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
-		len += sprintf(p + len,
-			       "commands:\tenable, disable, reset, <mask>\n");
+		seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
+		seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
 	} else {
-		len += sprintf(p + len, "mask:\t\tnot supported\n");
-		len += sprintf(p + len, "commands:\tenable, disable, reset\n");
+		seq_printf(m, "mask:\t\tnot supported\n");
+		seq_printf(m, "commands:\tenable, disable, reset\n");
 	}
 
-	return len;
+	return 0;
 }
 
 static void hotkey_enabledisable_warn(bool enable)
@@ -4034,9 +4056,9 @@  static int __init bluetooth_init(struct ibm_init_struct *iibm)
 }
 
 /* procfs -------------------------------------------------------------- */
-static int bluetooth_read(char *p)
+static int bluetooth_read(struct seq_file *m)
 {
-	return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
+	return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
 }
 
 static int bluetooth_write(char *buf)
@@ -4225,9 +4247,9 @@  static int __init wan_init(struct ibm_init_struct *iibm)
 }
 
 /* procfs -------------------------------------------------------------- */
-static int wan_read(char *p)
+static int wan_read(struct seq_file *m)
 {
-	return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
+	return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
 }
 
 static int wan_write(char *buf)
@@ -4602,16 +4624,19 @@  static int video_expand_toggle(void)
 	/* not reached */
 }
 
-static int video_read(char *p)
+static int video_read(struct seq_file *m)
 {
 	int status, autosw;
-	int len = 0;
 
 	if (video_supported == TPACPI_VIDEO_NONE) {
-		len += sprintf(p + len, "status:\t\tnot supported\n");
-		return len;
+		seq_printf(m, "status:\t\tnot supported\n");
+		return 0;
 	}
 
+	/* Even reads can crash X.org, so... */
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	status = video_outputsw_get();
 	if (status < 0)
 		return status;
@@ -4620,20 +4645,20 @@  static int video_read(char *p)
 	if (autosw < 0)
 		return autosw;
 
-	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));
+	seq_printf(m, "status:\t\tsupported\n");
+	seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
+	seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
 	if (video_supported == TPACPI_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");
+		seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
+	seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
+	seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
+	seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
 	if (video_supported == TPACPI_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");
+		seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
+	seq_printf(m, "commands:\tauto_enable, auto_disable\n");
+	seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
 
-	return len;
+	return 0;
 }
 
 static int video_write(char *buf)
@@ -4645,6 +4670,10 @@  static int video_write(char *buf)
 	if (video_supported == TPACPI_VIDEO_NONE)
 		return -ENODEV;
 
+	/* Even reads can crash X.org, let alone writes... */
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	enable = 0;
 	disable = 0;
 
@@ -4825,25 +4854,24 @@  static void light_exit(void)
 		flush_workqueue(tpacpi_wq);
 }
 
-static int light_read(char *p)
+static int light_read(struct seq_file *m)
 {
-	int len = 0;
 	int status;
 
 	if (!tp_features.light) {
-		len += sprintf(p + len, "status:\t\tnot supported\n");
+		seq_printf(m, "status:\t\tnot supported\n");
 	} else if (!tp_features.light_status) {
-		len += sprintf(p + len, "status:\t\tunknown\n");
-		len += sprintf(p + len, "commands:\ton, off\n");
+		seq_printf(m, "status:\t\tunknown\n");
+		seq_printf(m, "commands:\ton, off\n");
 	} else {
 		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");
+		seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
+		seq_printf(m, "commands:\ton, off\n");
 	}
 
-	return len;
+	return 0;
 }
 
 static int light_write(char *buf)
@@ -4921,20 +4949,18 @@  static void cmos_exit(void)
 	device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
 }
 
-static int cmos_read(char *p)
+static int cmos_read(struct seq_file *m)
 {
-	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");
+		seq_printf(m, "status:\t\tnot supported\n");
 	else {
-		len += sprintf(p + len, "status:\t\tsupported\n");
-		len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
+		seq_printf(m, "status:\t\tsupported\n");
+		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
 	}
 
-	return len;
+	return 0;
 }
 
 static int cmos_write(char *buf)
@@ -5309,15 +5335,13 @@  static int __init led_init(struct ibm_init_struct *iibm)
 	((s) == TPACPI_LED_OFF ? "off" : \
 		((s) == TPACPI_LED_ON ? "on" : "blinking"))
 
-static int led_read(char *p)
+static int led_read(struct seq_file *m)
 {
-	int len = 0;
-
 	if (!led_supported) {
-		len += sprintf(p + len, "status:\t\tnot supported\n");
-		return len;
+		seq_printf(m, "status:\t\tnot supported\n");
+		return 0;
 	}
-	len += sprintf(p + len, "status:\t\tsupported\n");
+	seq_printf(m, "status:\t\tsupported\n");
 
 	if (led_supported == TPACPI_LED_570) {
 		/* 570 */
@@ -5326,15 +5350,15 @@  static int led_read(char *p)
 			status = led_get_status(i);
 			if (status < 0)
 				return -EIO;
-			len += sprintf(p + len, "%d:\t\t%s\n",
+			seq_printf(m, "%d:\t\t%s\n",
 				       i, str_led_status(status));
 		}
 	}
 
-	len += sprintf(p + len, "commands:\t"
+	seq_printf(m, "commands:\t"
 		       "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
 
-	return len;
+	return 0;
 }
 
 static int led_write(char *buf)
@@ -5407,18 +5431,16 @@  static int __init beep_init(struct ibm_init_struct *iibm)
 	return (beep_handle)? 0 : 1;
 }
 
-static int beep_read(char *p)
+static int beep_read(struct seq_file *m)
 {
-	int len = 0;
-
 	if (!beep_handle)
-		len += sprintf(p + len, "status:\t\tnot supported\n");
+		seq_printf(m, "status:\t\tnot supported\n");
 	else {
-		len += sprintf(p + len, "status:\t\tsupported\n");
-		len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
+		seq_printf(m, "status:\t\tsupported\n");
+		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
 	}
 
-	return len;
+	return 0;
 }
 
 static int beep_write(char *buf)
@@ -5471,8 +5493,11 @@  enum { /* TPACPI_THERMAL_TPEC_* */
 	TP_EC_THERMAL_TMP0 = 0x78,	/* ACPI EC regs TMP 0..7 */
 	TP_EC_THERMAL_TMP8 = 0xC0,	/* ACPI EC regs TMP 8..15 */
 	TP_EC_THERMAL_TMP_NA = -128,	/* ACPI EC sensor not available */
+
+	TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
 };
 
+
 #define TPACPI_MAX_THERMAL_SENSORS 16	/* Max thermal sensors supported */
 struct ibm_thermal_sensors_struct {
 	s32 temp[TPACPI_MAX_THERMAL_SENSORS];
@@ -5562,6 +5587,28 @@  static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
 	return n;
 }
 
+static void thermal_dump_all_sensors(void)
+{
+	int n, i;
+	struct ibm_thermal_sensors_struct t;
+
+	n = thermal_get_sensors(&t);
+	if (n <= 0)
+		return;
+
+	printk(TPACPI_NOTICE
+		"temperatures (Celsius):");
+
+	for (i = 0; i < n; i++) {
+		if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
+			printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
+		else
+			printk(KERN_CONT " N/A");
+	}
+
+	printk(KERN_CONT "\n");
+}
+
 /* sysfs temp##_input -------------------------------------------------- */
 
 static ssize_t thermal_temp_input_show(struct device *dev,
@@ -5577,7 +5624,7 @@  static ssize_t thermal_temp_input_show(struct device *dev,
 	res = thermal_get_sensor(idx, &value);
 	if (res)
 		return res;
-	if (value == TP_EC_THERMAL_TMP_NA * 1000)
+	if (value == TPACPI_THERMAL_SENSOR_NA)
 		return -ENXIO;
 
 	return snprintf(buf, PAGE_SIZE, "%d\n", value);
@@ -5754,9 +5801,8 @@  static void thermal_exit(void)
 	}
 }
 
-static int thermal_read(char *p)
+static int thermal_read(struct seq_file *m)
 {
-	int len = 0;
 	int n, i;
 	struct ibm_thermal_sensors_struct t;
 
@@ -5764,16 +5810,16 @@  static int thermal_read(char *p)
 	if (unlikely(n < 0))
 		return n;
 
-	len += sprintf(p + len, "temperatures:\t");
+	seq_printf(m, "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);
+			seq_printf(m, "%d ", t.temp[i] / 1000);
+		seq_printf(m, "%d\n", t.temp[i] / 1000);
 	} else
-		len += sprintf(p + len, "not supported\n");
+		seq_printf(m, "not supported\n");
 
-	return len;
+	return 0;
 }
 
 static struct ibm_struct thermal_driver_data = {
@@ -5788,39 +5834,38 @@  static struct ibm_struct thermal_driver_data = {
 
 static u8 ecdump_regs[256];
 
-static int ecdump_read(char *p)
+static int ecdump_read(struct seq_file *m)
 {
-	int len = 0;
 	int i, j;
 	u8 v;
 
-	len += sprintf(p + len, "EC      "
+	seq_printf(m, "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);
+		seq_printf(m, "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);
+				seq_printf(m, " *%02x", v);
 			else
-				len += sprintf(p + len, "  %02x", v);
+				seq_printf(m, "  %02x", v);
 			ecdump_regs[i + j] = v;
 		}
-		len += sprintf(p + len, "\n");
+		seq_putc(m, '\n');
 		if (j != 16)
 			break;
 	}
 
 	/* These are way too dangerous to advertise openly... */
 #if 0
-	len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
+	seq_printf(m, "commands:\t0x<offset> 0x<value>"
 		       " (<offset> is 00-ff, <value> is 00-ff)\n");
-	len += sprintf(p + len, "commands:\t0x<offset> <value>  "
+	seq_printf(m, "commands:\t0x<offset> <value>  "
 		       " (<offset> is 00-ff, <value> is 0-255)\n");
 #endif
-	return len;
+	return 0;
 }
 
 static int ecdump_write(char *buf)
@@ -6083,6 +6128,12 @@  static int brightness_get(struct backlight_device *bd)
 	return status & TP_EC_BACKLIGHT_LVLMSK;
 }
 
+static void tpacpi_brightness_notify_change(void)
+{
+	backlight_force_update(ibm_backlight_device,
+			       BACKLIGHT_UPDATE_HOTKEY);
+}
+
 static struct backlight_ops ibm_backlight_data = {
 	.get_brightness = brightness_get,
 	.update_status  = brightness_update_status,
@@ -6211,9 +6262,9 @@  static int __init brightness_init(struct ibm_init_struct *iibm)
 		printk(TPACPI_INFO
 		       "detected a 16-level brightness capable ThinkPad\n");
 
-	ibm_backlight_device = backlight_device_register(
-					TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
-					&ibm_backlight_data);
+	ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
+							 NULL, NULL,
+							 &ibm_backlight_data);
 	if (IS_ERR(ibm_backlight_device)) {
 		int rc = PTR_ERR(ibm_backlight_device);
 		ibm_backlight_device = NULL;
@@ -6232,11 +6283,15 @@  static int __init brightness_init(struct ibm_init_struct *iibm)
 			"or not on your ThinkPad\n", TPACPI_MAIL);
 	}
 
-	ibm_backlight_device->props.max_brightness =
-				(tp_features.bright_16levels)? 15 : 7;
 	ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
 	backlight_update_status(ibm_backlight_device);
 
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
+			"brightness: registering brightness hotkeys "
+			"as change notification\n");
+	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
+				| TP_ACPI_HKEY_BRGHTUP_MASK
+				| TP_ACPI_HKEY_BRGHTDWN_MASK);;
 	return 0;
 }
 
@@ -6261,23 +6316,22 @@  static void brightness_exit(void)
 	tpacpi_brightness_checkpoint_nvram();
 }
 
-static int brightness_read(char *p)
+static int brightness_read(struct seq_file *m)
 {
-	int len = 0;
 	int level;
 
 	level = brightness_get(NULL);
 	if (level < 0) {
-		len += sprintf(p + len, "level:\t\tunreadable\n");
+		seq_printf(m, "level:\t\tunreadable\n");
 	} else {
-		len += sprintf(p + len, "level:\t\t%d\n", level);
-		len += sprintf(p + len, "commands:\tup, down\n");
-		len += sprintf(p + len, "commands:\tlevel <level>"
+		seq_printf(m, "level:\t\t%d\n", level);
+		seq_printf(m, "commands:\tup, down\n");
+		seq_printf(m, "commands:\tlevel <level>"
 			       " (<level> is 0-%d)\n",
 			       (tp_features.bright_16levels) ? 15 : 7);
 	}
 
-	return len;
+	return 0;
 }
 
 static int brightness_write(char *buf)
@@ -6313,6 +6367,9 @@  static int brightness_write(char *buf)
 	 * Doing it this way makes the syscall restartable in case of EINTR
 	 */
 	rc = brightness_set(level);
+	if (!rc && ibm_backlight_device)
+		backlight_force_update(ibm_backlight_device,
+					BACKLIGHT_UPDATE_SYSFS);
 	return (rc == -EINTR)? -ERESTARTSYS : rc;
 }
 
@@ -6329,101 +6386,704 @@  static struct ibm_struct brightness_driver_data = {
  * Volume subdriver
  */
 
-static int volume_offset = 0x30;
+/*
+ * IBM ThinkPads have a simple volume controller with MUTE gating.
+ * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
+ *
+ * Since the *61 series (and probably also the later *60 series), Lenovo
+ * ThinkPads only implement the MUTE gate.
+ *
+ * EC register 0x30
+ *   Bit 6: MUTE (1 mutes sound)
+ *   Bit 3-0: Volume
+ *   Other bits should be zero as far as we know.
+ *
+ * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
+ * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
+ * such as bit 7 which is used to detect repeated presses of MUTE,
+ * and we leave them unchanged.
+ */
+
+#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
 
-static int volume_read(char *p)
+#define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
+#define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
+#define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
+
+static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
+static char *alsa_id = "ThinkPadEC";
+static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
+
+struct tpacpi_alsa_data {
+	struct snd_card *card;
+	struct snd_ctl_elem_id *ctl_mute_id;
+	struct snd_ctl_elem_id *ctl_vol_id;
+};
+
+static struct snd_card *alsa_card;
+
+enum {
+	TP_EC_AUDIO = 0x30,
+
+	/* TP_EC_AUDIO bits */
+	TP_EC_AUDIO_MUTESW = 6,
+
+	/* TP_EC_AUDIO bitmasks */
+	TP_EC_AUDIO_LVL_MSK = 0x0F,
+	TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
+
+	/* Maximum volume */
+	TP_EC_VOLUME_MAX = 14,
+};
+
+enum tpacpi_volume_access_mode {
+	TPACPI_VOL_MODE_AUTO = 0,	/* Not implemented yet */
+	TPACPI_VOL_MODE_EC,		/* Pure EC control */
+	TPACPI_VOL_MODE_UCMS_STEP,	/* UCMS step-based control: N/A */
+	TPACPI_VOL_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
+	TPACPI_VOL_MODE_MAX
+};
+
+enum tpacpi_volume_capabilities {
+	TPACPI_VOL_CAP_AUTO = 0,	/* Use white/blacklist */
+	TPACPI_VOL_CAP_VOLMUTE,		/* Output vol and mute */
+	TPACPI_VOL_CAP_MUTEONLY,	/* Output mute only */
+	TPACPI_VOL_CAP_MAX
+};
+
+static enum tpacpi_volume_access_mode volume_mode =
+	TPACPI_VOL_MODE_MAX;
+
+static enum tpacpi_volume_capabilities volume_capabilities;
+static int volume_control_allowed;
+
+/*
+ * Used to syncronize writers to TP_EC_AUDIO and
+ * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
+ */
+static struct mutex volume_mutex;
+
+static void tpacpi_volume_checkpoint_nvram(void)
 {
-	int len = 0;
-	u8 level;
+	u8 lec = 0;
+	u8 b_nvram;
+	u8 ec_mask;
+
+	if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
+		return;
+	if (!volume_control_allowed)
+		return;
 
-	if (!acpi_ec_read(volume_offset, &level)) {
-		len += sprintf(p + len, "level:\t\tunreadable\n");
+	vdbg_printk(TPACPI_DBG_MIXER,
+		"trying to checkpoint mixer state to NVRAM...\n");
+
+	if (tp_features.mixer_no_level_control)
+		ec_mask = TP_EC_AUDIO_MUTESW_MSK;
+	else
+		ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
+
+	if (mutex_lock_killable(&volume_mutex) < 0)
+		return;
+
+	if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
+		goto unlock;
+	lec &= ec_mask;
+	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
+
+	if (lec != (b_nvram & ec_mask)) {
+		/* NVRAM needs update */
+		b_nvram &= ~ec_mask;
+		b_nvram |= lec;
+		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
+		dbg_printk(TPACPI_DBG_MIXER,
+			   "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
+			   (unsigned int) lec, (unsigned int) b_nvram);
 	} else {
-		len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
-		len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
-		len += sprintf(p + len, "commands:\tup, down, mute\n");
-		len += sprintf(p + len, "commands:\tlevel <level>"
-			       " (<level> is 0-15)\n");
+		vdbg_printk(TPACPI_DBG_MIXER,
+			   "NVRAM mixer status already is 0x%02x (0x%02x)\n",
+			   (unsigned int) lec, (unsigned int) b_nvram);
 	}
 
-	return len;
+unlock:
+	mutex_unlock(&volume_mutex);
 }
 
-static int volume_write(char *buf)
+static int volume_get_status_ec(u8 *status)
 {
-	int cmos_cmd, inc, i;
-	u8 level, mute;
-	int new_level, new_mute;
-	char *cmd;
+	u8 s;
 
-	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 (!acpi_ec_read(TP_EC_AUDIO, &s))
+		return -EIO;
 
-		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;
+	*status = s;
 
-		if (new_level != level) {
-			/* mute doesn't change */
+	dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
 
-			cmos_cmd = (new_level > level) ?
-					TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
-			inc = new_level > level ? 1 : -1;
+	return 0;
+}
 
-			if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
-				     !acpi_ec_write(volume_offset, level)))
-				return -EIO;
+static int volume_get_status(u8 *status)
+{
+	return volume_get_status_ec(status);
+}
+
+static int volume_set_status_ec(const u8 status)
+{
+	if (!acpi_ec_write(TP_EC_AUDIO, status))
+		return -EIO;
 
-			for (i = level; i != new_level; i += inc)
-				if (issue_thinkpad_cmos_command(cmos_cmd) ||
-				    !acpi_ec_write(volume_offset, i + inc))
-					return -EIO;
+	dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
 
-			if (mute &&
-			    (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
-			     !acpi_ec_write(volume_offset, new_level + mute))) {
-				return -EIO;
-			}
+	return 0;
+}
+
+static int volume_set_status(const u8 status)
+{
+	return volume_set_status_ec(status);
+}
+
+/* returns < 0 on error, 0 on no change, 1 on change */
+static int __volume_set_mute_ec(const bool mute)
+{
+	int rc;
+	u8 s, n;
+
+	if (mutex_lock_killable(&volume_mutex) < 0)
+		return -EINTR;
+
+	rc = volume_get_status_ec(&s);
+	if (rc)
+		goto unlock;
+
+	n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
+		     s & ~TP_EC_AUDIO_MUTESW_MSK;
+
+	if (n != s) {
+		rc = volume_set_status_ec(n);
+		if (!rc)
+			rc = 1;
+	}
+
+unlock:
+	mutex_unlock(&volume_mutex);
+	return rc;
+}
+
+static int volume_alsa_set_mute(const bool mute)
+{
+	dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
+		   (mute) ? "" : "un");
+	return __volume_set_mute_ec(mute);
+}
+
+static int volume_set_mute(const bool mute)
+{
+	int rc;
+
+	dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
+		   (mute) ? "" : "un");
+
+	rc = __volume_set_mute_ec(mute);
+	return (rc < 0) ? rc : 0;
+}
+
+/* returns < 0 on error, 0 on no change, 1 on change */
+static int __volume_set_volume_ec(const u8 vol)
+{
+	int rc;
+	u8 s, n;
+
+	if (vol > TP_EC_VOLUME_MAX)
+		return -EINVAL;
+
+	if (mutex_lock_killable(&volume_mutex) < 0)
+		return -EINTR;
+
+	rc = volume_get_status_ec(&s);
+	if (rc)
+		goto unlock;
+
+	n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
+
+	if (n != s) {
+		rc = volume_set_status_ec(n);
+		if (!rc)
+			rc = 1;
+	}
+
+unlock:
+	mutex_unlock(&volume_mutex);
+	return rc;
+}
+
+static int volume_alsa_set_volume(const u8 vol)
+{
+	dbg_printk(TPACPI_DBG_MIXER,
+		   "ALSA: trying to set volume level to %hu\n", vol);
+	return __volume_set_volume_ec(vol);
+}
+
+static void volume_alsa_notify_change(void)
+{
+	struct tpacpi_alsa_data *d;
+
+	if (alsa_card && alsa_card->private_data) {
+		d = alsa_card->private_data;
+		if (d->ctl_mute_id)
+			snd_ctl_notify(alsa_card,
+					SNDRV_CTL_EVENT_MASK_VALUE,
+					d->ctl_mute_id);
+		if (d->ctl_vol_id)
+			snd_ctl_notify(alsa_card,
+					SNDRV_CTL_EVENT_MASK_VALUE,
+					d->ctl_vol_id);
+	}
+}
+
+static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = TP_EC_VOLUME_MAX;
+	return 0;
+}
+
+static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	u8 s;
+	int rc;
+
+	rc = volume_get_status(&s);
+	if (rc < 0)
+		return rc;
+
+	ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
+	return 0;
+}
+
+static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
+}
+
+#define volume_alsa_mute_info snd_ctl_boolean_mono_info
+
+static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	u8 s;
+	int rc;
+
+	rc = volume_get_status(&s);
+	if (rc < 0)
+		return rc;
+
+	ucontrol->value.integer.value[0] =
+				(s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
+	return 0;
+}
+
+static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
+}
+
+static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Console Playback Volume",
+	.index = 0,
+	.access = SNDRV_CTL_ELEM_ACCESS_READ,
+	.info = volume_alsa_vol_info,
+	.get = volume_alsa_vol_get,
+};
+
+static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Console Playback Switch",
+	.index = 0,
+	.access = SNDRV_CTL_ELEM_ACCESS_READ,
+	.info = volume_alsa_mute_info,
+	.get = volume_alsa_mute_get,
+};
+
+static void volume_suspend(pm_message_t state)
+{
+	tpacpi_volume_checkpoint_nvram();
+}
+
+static void volume_resume(void)
+{
+	volume_alsa_notify_change();
+}
+
+static void volume_shutdown(void)
+{
+	tpacpi_volume_checkpoint_nvram();
+}
+
+static void volume_exit(void)
+{
+	if (alsa_card) {
+		snd_card_free(alsa_card);
+		alsa_card = NULL;
+	}
+
+	tpacpi_volume_checkpoint_nvram();
+}
+
+static int __init volume_create_alsa_mixer(void)
+{
+	struct snd_card *card;
+	struct tpacpi_alsa_data *data;
+	struct snd_kcontrol *ctl_vol;
+	struct snd_kcontrol *ctl_mute;
+	int rc;
+
+	rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
+			    sizeof(struct tpacpi_alsa_data), &card);
+	if (rc < 0 || !card) {
+		printk(TPACPI_ERR
+			"Failed to create ALSA card structures: %d\n", rc);
+		return 1;
+	}
+
+	BUG_ON(!card->private_data);
+	data = card->private_data;
+	data->card = card;
+
+	strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
+		sizeof(card->driver));
+	strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
+		sizeof(card->shortname));
+	snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
+		 (thinkpad_id.ec_version_str) ?
+			thinkpad_id.ec_version_str : "(unknown)");
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
+		 (thinkpad_id.ec_version_str) ?
+			thinkpad_id.ec_version_str : "unknown");
+
+	if (volume_control_allowed) {
+		volume_alsa_control_vol.put = volume_alsa_vol_put;
+		volume_alsa_control_vol.access =
+				SNDRV_CTL_ELEM_ACCESS_READWRITE;
+
+		volume_alsa_control_mute.put = volume_alsa_mute_put;
+		volume_alsa_control_mute.access =
+				SNDRV_CTL_ELEM_ACCESS_READWRITE;
+	}
+
+	if (!tp_features.mixer_no_level_control) {
+		ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
+		rc = snd_ctl_add(card, ctl_vol);
+		if (rc < 0) {
+			printk(TPACPI_ERR
+				"Failed to create ALSA volume control: %d\n",
+				rc);
+			goto err_exit;
 		}
+		data->ctl_vol_id = &ctl_vol->id;
+	}
 
-		if (new_mute != mute) {
-			/* level doesn't change */
+	ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
+	rc = snd_ctl_add(card, ctl_mute);
+	if (rc < 0) {
+		printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n",
+			rc);
+		goto err_exit;
+	}
+	data->ctl_mute_id = &ctl_mute->id;
 
-			cmos_cmd = (new_mute) ?
-				   TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
+	snd_card_set_dev(card, &tpacpi_pdev->dev);
+	rc = snd_card_register(card);
+	if (rc < 0) {
+		printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc);
+		goto err_exit;
+	}
 
-			if (issue_thinkpad_cmos_command(cmos_cmd) ||
-			    !acpi_ec_write(volume_offset, level + new_mute))
-				return -EIO;
+	alsa_card = card;
+	return 0;
+
+err_exit:
+	snd_card_free(card);
+	return 1;
+}
+
+#define TPACPI_VOL_Q_MUTEONLY	0x0001	/* Mute-only control available */
+#define TPACPI_VOL_Q_LEVEL	0x0002  /* Volume control available */
+
+static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
+	/* Whitelist volume level on all IBM by default */
+	{ .vendor = PCI_VENDOR_ID_IBM,
+	  .bios   = TPACPI_MATCH_ANY,
+	  .ec     = TPACPI_MATCH_ANY,
+	  .quirks = TPACPI_VOL_Q_LEVEL },
+
+	/* Lenovo models with volume control (needs confirmation) */
+	TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
+	TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
+	TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
+	TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
+	TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
+	TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
+	TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
+
+	/* Whitelist mute-only on all Lenovo by default */
+	{ .vendor = PCI_VENDOR_ID_LENOVO,
+	  .bios   = TPACPI_MATCH_ANY,
+	  .ec	  = TPACPI_MATCH_ANY,
+	  .quirks = TPACPI_VOL_Q_MUTEONLY }
+};
+
+static int __init volume_init(struct ibm_init_struct *iibm)
+{
+	unsigned long quirks;
+	int rc;
+
+	vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
+
+	mutex_init(&volume_mutex);
+
+	/*
+	 * Check for module parameter bogosity, note that we
+	 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
+	 * able to detect "unspecified"
+	 */
+	if (volume_mode > TPACPI_VOL_MODE_MAX)
+		return -EINVAL;
+
+	if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
+		printk(TPACPI_ERR
+			"UCMS step volume mode not implemented, "
+			"please contact %s\n", TPACPI_MAIL);
+		return 1;
+	}
+
+	if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
+		return -EINVAL;
+
+	/*
+	 * The ALSA mixer is our primary interface.
+	 * When disabled, don't install the subdriver at all
+	 */
+	if (!alsa_enable) {
+		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
+			    "ALSA mixer disabled by parameter, "
+			    "not loading volume subdriver...\n");
+		return 1;
+	}
+
+	quirks = tpacpi_check_quirks(volume_quirk_table,
+				     ARRAY_SIZE(volume_quirk_table));
+
+	switch (volume_capabilities) {
+	case TPACPI_VOL_CAP_AUTO:
+		if (quirks & TPACPI_VOL_Q_MUTEONLY)
+			tp_features.mixer_no_level_control = 1;
+		else if (quirks & TPACPI_VOL_Q_LEVEL)
+			tp_features.mixer_no_level_control = 0;
+		else
+			return 1; /* no mixer */
+		break;
+	case TPACPI_VOL_CAP_VOLMUTE:
+		tp_features.mixer_no_level_control = 0;
+		break;
+	case TPACPI_VOL_CAP_MUTEONLY:
+		tp_features.mixer_no_level_control = 1;
+		break;
+	default:
+		return 1;
+	}
+
+	if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
+				"using user-supplied volume_capabilities=%d\n",
+				volume_capabilities);
+
+	if (volume_mode == TPACPI_VOL_MODE_AUTO ||
+	    volume_mode == TPACPI_VOL_MODE_MAX) {
+		volume_mode = TPACPI_VOL_MODE_ECNVRAM;
+
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
+				"driver auto-selected volume_mode=%d\n",
+				volume_mode);
+	} else {
+		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
+				"using user-supplied volume_mode=%d\n",
+				volume_mode);
+	}
+
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
+			"mute is supported, volume control is %s\n",
+			str_supported(!tp_features.mixer_no_level_control));
+
+	rc = volume_create_alsa_mixer();
+	if (rc) {
+		printk(TPACPI_ERR
+			"Could not create the ALSA mixer interface\n");
+		return rc;
+	}
+
+	printk(TPACPI_INFO
+		"Console audio control enabled, mode: %s\n",
+		(volume_control_allowed) ?
+			"override (read/write)" :
+			"monitor (read only)");
+
+	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
+		"registering volume hotkeys as change notification\n");
+	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
+			| TP_ACPI_HKEY_VOLUP_MASK
+			| TP_ACPI_HKEY_VOLDWN_MASK
+			| TP_ACPI_HKEY_MUTE_MASK);
+
+	return 0;
+}
+
+static int volume_read(struct seq_file *m)
+{
+	u8 status;
+
+	if (volume_get_status(&status) < 0) {
+		seq_printf(m, "level:\t\tunreadable\n");
+	} else {
+		if (tp_features.mixer_no_level_control)
+			seq_printf(m, "level:\t\tunsupported\n");
+		else
+			seq_printf(m, "level:\t\t%d\n",
+					status & TP_EC_AUDIO_LVL_MSK);
+
+		seq_printf(m, "mute:\t\t%s\n",
+				onoff(status, TP_EC_AUDIO_MUTESW));
+
+		if (volume_control_allowed) {
+			seq_printf(m, "commands:\tunmute, mute\n");
+			if (!tp_features.mixer_no_level_control) {
+				seq_printf(m,
+					       "commands:\tup, down\n");
+				seq_printf(m,
+					       "commands:\tlevel <level>"
+					       " (<level> is 0-%d)\n",
+					       TP_EC_VOLUME_MAX);
+			}
 		}
 	}
 
 	return 0;
 }
 
+static int volume_write(char *buf)
+{
+	u8 s;
+	u8 new_level, new_mute;
+	int l;
+	char *cmd;
+	int rc;
+
+	/*
+	 * We do allow volume control at driver startup, so that the
+	 * user can set initial state through the volume=... parameter hack.
+	 */
+	if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
+		if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
+			tp_warned.volume_ctrl_forbidden = 1;
+			printk(TPACPI_NOTICE
+				"Console audio control in monitor mode, "
+				"changes are not allowed.\n");
+			printk(TPACPI_NOTICE
+				"Use the volume_control=1 module parameter "
+				"to enable volume control\n");
+		}
+		return -EPERM;
+	}
+
+	rc = volume_get_status(&s);
+	if (rc < 0)
+		return rc;
+
+	new_level = s & TP_EC_AUDIO_LVL_MSK;
+	new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
+
+	while ((cmd = next_cmd(&buf))) {
+		if (!tp_features.mixer_no_level_control) {
+			if (strlencmp(cmd, "up") == 0) {
+				if (new_mute)
+					new_mute = 0;
+				else if (new_level < TP_EC_VOLUME_MAX)
+					new_level++;
+				continue;
+			} else if (strlencmp(cmd, "down") == 0) {
+				if (new_mute)
+					new_mute = 0;
+				else if (new_level > 0)
+					new_level--;
+				continue;
+			} else if (sscanf(cmd, "level %u", &l) == 1 &&
+				   l >= 0 && l <= TP_EC_VOLUME_MAX) {
+					new_level = l;
+				continue;
+			}
+		}
+		if (strlencmp(cmd, "mute") == 0)
+			new_mute = TP_EC_AUDIO_MUTESW_MSK;
+		else if (strlencmp(cmd, "unmute") == 0)
+			new_mute = 0;
+		else
+			return -EINVAL;
+	}
+
+	if (tp_features.mixer_no_level_control) {
+		tpacpi_disclose_usertask("procfs volume", "%smute\n",
+					new_mute ? "" : "un");
+		rc = volume_set_mute(!!new_mute);
+	} else {
+		tpacpi_disclose_usertask("procfs volume",
+					"%smute and set level to %d\n",
+					new_mute ? "" : "un", new_level);
+		rc = volume_set_status(new_mute | new_level);
+	}
+	volume_alsa_notify_change();
+
+	return (rc == -EINTR) ? -ERESTARTSYS : rc;
+}
+
 static struct ibm_struct volume_driver_data = {
 	.name = "volume",
 	.read = volume_read,
 	.write = volume_write,
+	.exit = volume_exit,
+	.suspend = volume_suspend,
+	.resume = volume_resume,
+	.shutdown = volume_shutdown,
 };
 
+#else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
+
+#define alsa_card NULL
+
+static void inline volume_alsa_notify_change(void)
+{
+}
+
+static int __init volume_init(struct ibm_init_struct *iibm)
+{
+	printk(TPACPI_INFO
+		"volume: disabled as there is no ALSA support in this kernel\n");
+
+	return 1;
+}
+
+static struct ibm_struct volume_driver_data = {
+	.name = "volume",
+};
+
+#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
+
 /*************************************************************************
  * Fan subdriver
  */
@@ -6449,7 +7109,7 @@  static struct ibm_struct volume_driver_data = {
  *
  * 	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
+ * 	maximum amount of fan duty cycle change per second seems to be
  * 	limited.
  *
  * 	Reading is not available if GFAN exists.
@@ -6533,7 +7193,7 @@  static struct ibm_struct volume_driver_data = {
  * 	The speeds are stored on handles
  * 	(FANA:FAN9), (FANC:FANB), (FANE:FAND).
  *
- * 	There are three default speed sets, acessible as handles:
+ * 	There are three default speed sets, accessible as handles:
  * 	FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
  *
  * 	ACPI DSDT switches which set is in use depending on various
@@ -7498,9 +8158,8 @@  static void fan_resume(void)
 	}
 }
 
-static int fan_read(char *p)
+static int fan_read(struct seq_file *m)
 {
-	int len = 0;
 	int rc;
 	u8 status;
 	unsigned int speed = 0;
@@ -7512,7 +8171,7 @@  static int fan_read(char *p)
 		if (rc < 0)
 			return rc;
 
-		len += sprintf(p + len, "status:\t\t%s\n"
+		seq_printf(m, "status:\t\t%s\n"
 			       "level:\t\t%d\n",
 			       (status != 0) ? "enabled" : "disabled", status);
 		break;
@@ -7523,54 +8182,54 @@  static int fan_read(char *p)
 		if (rc < 0)
 			return rc;
 
-		len += sprintf(p + len, "status:\t\t%s\n",
+		seq_printf(m, "status:\t\t%s\n",
 			       (status != 0) ? "enabled" : "disabled");
 
 		rc = fan_get_speed(&speed);
 		if (rc < 0)
 			return rc;
 
-		len += sprintf(p + len, "speed:\t\t%d\n", speed);
+		seq_printf(m, "speed:\t\t%d\n", speed);
 
 		if (status & TP_EC_FAN_FULLSPEED)
 			/* Disengaged mode takes precedence */
-			len += sprintf(p + len, "level:\t\tdisengaged\n");
+			seq_printf(m, "level:\t\tdisengaged\n");
 		else if (status & TP_EC_FAN_AUTO)
-			len += sprintf(p + len, "level:\t\tauto\n");
+			seq_printf(m, "level:\t\tauto\n");
 		else
-			len += sprintf(p + len, "level:\t\t%d\n", status);
+			seq_printf(m, "level:\t\t%d\n", status);
 		break;
 
 	case TPACPI_FAN_NONE:
 	default:
-		len += sprintf(p + len, "status:\t\tnot supported\n");
+		seq_printf(m, "status:\t\tnot supported\n");
 	}
 
 	if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
-		len += sprintf(p + len, "commands:\tlevel <level>");
+		seq_printf(m, "commands:\tlevel <level>");
 
 		switch (fan_control_access_mode) {
 		case TPACPI_FAN_WR_ACPI_SFAN:
-			len += sprintf(p + len, " (<level> is 0-7)\n");
+			seq_printf(m, " (<level> is 0-7)\n");
 			break;
 
 		default:
-			len += sprintf(p + len, " (<level> is 0-7, "
+			seq_printf(m, " (<level> is 0-7, "
 				       "auto, disengaged, full-speed)\n");
 			break;
 		}
 	}
 
 	if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
-		len += sprintf(p + len, "commands:\tenable, disable\n"
+		seq_printf(m, "commands:\tenable, disable\n"
 			       "commands:\twatchdog <timeout> (<timeout> "
 			       "is 0 (off), 1-120 (seconds))\n");
 
 	if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
-		len += sprintf(p + len, "commands:\tspeed <speed>"
+		seq_printf(m, "commands:\tspeed <speed>"
 			       " (<speed> is 0-65535)\n");
 
-	return len;
+	return 0;
 }
 
 static int fan_write_cmd_level(const char *cmd, int *rc)
@@ -7712,10 +8371,23 @@  static struct ibm_struct fan_driver_data = {
  */
 static void tpacpi_driver_event(const unsigned int hkey_event)
 {
+	if (ibm_backlight_device) {
+		switch (hkey_event) {
+		case TP_HKEY_EV_BRGHT_UP:
+		case TP_HKEY_EV_BRGHT_DOWN:
+			tpacpi_brightness_notify_change();
+		}
+	}
+	if (alsa_card) {
+		switch (hkey_event) {
+		case TP_HKEY_EV_VOL_UP:
+		case TP_HKEY_EV_VOL_DOWN:
+		case TP_HKEY_EV_VOL_MUTE:
+			volume_alsa_notify_change();
+		}
+	}
 }
 
-
-
 static void hotkey_driver_event(const unsigned int scancode)
 {
 	tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
@@ -7844,19 +8516,20 @@  static int __init ibm_init(struct ibm_init_struct *iibm)
 		"%s installed\n", ibm->name);
 
 	if (ibm->read) {
-		entry = create_proc_entry(ibm->name,
-					  S_IFREG | S_IRUGO | S_IWUSR,
-					  proc_dir);
+		mode_t mode = iibm->base_procfs_mode;
+
+		if (!mode)
+			mode = S_IRUGO;
+		if (ibm->write)
+			mode |= S_IWUSR;
+		entry = proc_create_data(ibm->name, mode, proc_dir,
+					 &dispatch_proc_fops, ibm);
 		if (!entry) {
 			printk(TPACPI_ERR "unable to create proc entry %s\n",
 			       ibm->name);
 			ret = -ENODEV;
 			goto err_out;
 		}
-		entry->data = ibm;
-		entry->read_proc = &dispatch_procfs_read;
-		if (ibm->write)
-			entry->write_proc = &dispatch_procfs_write;
 		ibm->flags.proc_created = 1;
 	}
 
@@ -8037,6 +8710,7 @@  static struct ibm_init_struct ibms_init[] __initdata = {
 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
 	{
 		.init = video_init,
+		.base_procfs_mode = S_IRUSR,
 		.data = &video_driver_data,
 	},
 #endif
@@ -8068,6 +8742,7 @@  static struct ibm_init_struct ibms_init[] __initdata = {
 		.data = &brightness_driver_data,
 	},
 	{
+		.init = volume_init,
 		.data = &volume_driver_data,
 	},
 	{
@@ -8103,36 +8778,61 @@  static int __init set_ibm_param(const char *val, struct kernel_param *kp)
 	return -EINVAL;
 }
 
-module_param(experimental, int, 0);
+module_param(experimental, int, 0444);
 MODULE_PARM_DESC(experimental,
 		 "Enables experimental features when non-zero");
 
 module_param_named(debug, dbg_level, uint, 0);
 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
 
-module_param(force_load, bool, 0);
+module_param(force_load, bool, 0444);
 MODULE_PARM_DESC(force_load,
 		 "Attempts to load the driver even on a "
 		 "mis-identified ThinkPad when true");
 
-module_param_named(fan_control, fan_control_allowed, bool, 0);
+module_param_named(fan_control, fan_control_allowed, bool, 0444);
 MODULE_PARM_DESC(fan_control,
 		 "Enables setting fan parameters features when true");
 
-module_param_named(brightness_mode, brightness_mode, uint, 0);
+module_param_named(brightness_mode, brightness_mode, uint, 0444);
 MODULE_PARM_DESC(brightness_mode,
 		 "Selects brightness control strategy: "
 		 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
 
-module_param(brightness_enable, uint, 0);
+module_param(brightness_enable, uint, 0444);
 MODULE_PARM_DESC(brightness_enable,
 		 "Enables backlight control when 1, disables when 0");
 
-module_param(hotkey_report_mode, uint, 0);
+module_param(hotkey_report_mode, uint, 0444);
 MODULE_PARM_DESC(hotkey_report_mode,
 		 "used for backwards compatibility with userspace, "
 		 "see documentation");
 
+#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
+module_param_named(volume_mode, volume_mode, uint, 0444);
+MODULE_PARM_DESC(volume_mode,
+		 "Selects volume control strategy: "
+		 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
+
+module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
+MODULE_PARM_DESC(volume_capabilities,
+		 "Selects the mixer capabilites: "
+		 "0=auto, 1=volume and mute, 2=mute only");
+
+module_param_named(volume_control, volume_control_allowed, bool, 0444);
+MODULE_PARM_DESC(volume_control,
+		 "Enables software override for the console audio "
+		 "control when true");
+
+/* ALSA module API parameters */
+module_param_named(index, alsa_index, int, 0444);
+MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
+module_param_named(id, alsa_id, charp, 0444);
+MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
+module_param_named(enable, alsa_enable, bool, 0444);
+MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
+#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
+
 #define TPACPI_PARAM(feature) \
 	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
 	MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
@@ -8151,25 +8851,25 @@  TPACPI_PARAM(volume);
 TPACPI_PARAM(fan);
 
 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
-module_param(dbg_wlswemul, uint, 0);
+module_param(dbg_wlswemul, uint, 0444);
 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
 MODULE_PARM_DESC(wlsw_state,
 		 "Initial state of the emulated WLSW switch");
 
-module_param(dbg_bluetoothemul, uint, 0);
+module_param(dbg_bluetoothemul, uint, 0444);
 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
 MODULE_PARM_DESC(bluetooth_state,
 		 "Initial state of the emulated bluetooth switch");
 
-module_param(dbg_wwanemul, uint, 0);
+module_param(dbg_wwanemul, uint, 0444);
 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
 MODULE_PARM_DESC(wwan_state,
 		 "Initial state of the emulated WWAN switch");
 
-module_param(dbg_uwbemul, uint, 0);
+module_param(dbg_uwbemul, uint, 0444);
 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
 MODULE_PARM_DESC(uwb_state,
@@ -8362,6 +9062,7 @@  static int __init thinkpad_acpi_module_init(void)
 						PCI_VENDOR_ID_IBM;
 		tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
 		tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
+		tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
 	}
 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
 		ret = ibm_init(&ibms_init[i]);