Pull battery-sbs-ac into release branch

drivers/acpi/Kconfig

@@ -88,7 +88,7 @@ config ACPI_PROC_EVENT
 
 config ACPI_AC
 	tristate "AC Adapter"
-	depends on X86
+	depends on X86 && POWER_SUPPLY
 	default y
 	help
 	  This driver adds support for the AC Adapter object, which indicates
@@ -97,7 +97,7 @@ config ACPI_AC
 
 config ACPI_BATTERY
 	tristate "Battery"
-	depends on X86
+	depends on X86 && POWER_SUPPLY
 	default y
 	help
 	  This driver adds support for battery information through
@@ -350,12 +350,11 @@ config ACPI_HOTPLUG_MEMORY
 		$>modprobe acpi_memhotplug 
 
 config ACPI_SBS
-	tristate "Smart Battery System (EXPERIMENTAL)"
+	tristate "Smart Battery System"
 	depends on X86
-	depends on EXPERIMENTAL
+	depends on POWER_SUPPLY
 	help
-	  This driver adds support for the Smart Battery System.
-	  A "Smart Battery" is quite old and quite rare compared
-	  to today's ACPI "Control Method" battery.
+	  This driver adds support for the Smart Battery System, another
+	  type of access to battery information, found on some laptops.
 
 endif	# ACPI

drivers/acpi/Makefile

@@ -60,3 +60,4 @@ obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
 obj-$(CONFIG_ACPI_HOTPLUG_MEMORY)	+= acpi_memhotplug.o
 obj-y				+= cm_sbs.o
 obj-$(CONFIG_ACPI_SBS)		+= sbs.o
+obj-$(CONFIG_ACPI_SBS)		+= sbshc.o

drivers/acpi/ac.c

@@ -29,6 +29,7 @@
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/power_supply.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
@@ -72,16 +73,37 @@ static struct acpi_driver acpi_ac_driver = {
 };
 
 struct acpi_ac {
+	struct power_supply charger;
 	struct acpi_device * device;
 	unsigned long state;
 };
 
+#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
+
 static const struct file_operations acpi_ac_fops = {
 	.open = acpi_ac_open_fs,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 };
+static int get_ac_property(struct power_supply *psy,
+			   enum power_supply_property psp,
+			   union power_supply_propval *val)
+{
+	struct acpi_ac *ac = to_acpi_ac(psy);
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = ac->state;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static enum power_supply_property ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
 
 /* --------------------------------------------------------------------------
                                AC Adapter Management
@@ -208,6 +230,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
 		acpi_bus_generate_netlink_event(device->pnp.device_class,
 						  device->dev.bus_id, event,
 						  (u32) ac->state);
+		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
 		break;
 	default:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -244,7 +267,12 @@ static int acpi_ac_add(struct acpi_device *device)
 	result = acpi_ac_add_fs(device);
 	if (result)
 		goto end;
-
+	ac->charger.name = acpi_device_bid(device);
+	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
+	ac->charger.properties = ac_props;
+	ac->charger.num_properties = ARRAY_SIZE(ac_props);
+	ac->charger.get_property = get_ac_property;
+	power_supply_register(&ac->device->dev, &ac->charger);
 	status = acpi_install_notify_handler(device->handle,
 					     ACPI_ALL_NOTIFY, acpi_ac_notify,
 					     ac);
@@ -279,7 +307,8 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
 
 	status = acpi_remove_notify_handler(device->handle,
 					    ACPI_ALL_NOTIFY, acpi_ac_notify);
-
+	if (ac->charger.dev)
+		power_supply_unregister(&ac->charger);
 	acpi_ac_remove_fs(device);
 
 	kfree(ac);

drivers/acpi/bus.c

@@ -284,15 +284,11 @@ DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
 
 extern int event_is_open;
 
-int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
+int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
 {
-	struct acpi_bus_event *event = NULL;
+	struct acpi_bus_event *event;
 	unsigned long flags = 0;
 
-
-	if (!device)
-		return -EINVAL;
-
 	/* drop event on the floor if no one's listening */
 	if (!event_is_open)
 		return 0;
@@ -301,8 +297,8 @@ int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 	if (!event)
 		return -ENOMEM;
 
-	strcpy(event->device_class, device->pnp.device_class);
-	strcpy(event->bus_id, device->pnp.bus_id);
+	strcpy(event->device_class, device_class);
+	strcpy(event->bus_id, bus_id);
 	event->type = type;
 	event->data = data;
 
@@ -313,6 +309,17 @@ int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 	wake_up_interruptible(&acpi_bus_event_queue);
 
 	return 0;
+
+}
+
+EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
+
+int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
+{
+	if (!device)
+		return -EINVAL;
+	return acpi_bus_generate_proc_event4(device->pnp.device_class,
+					     device->pnp.bus_id, type, data);
 }
 
 EXPORT_SYMBOL(acpi_bus_generate_proc_event);

drivers/acpi/ec.c

@@ -425,7 +425,7 @@ int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
 	handler->func = func;
 	handler->data = data;
 	mutex_lock(&ec->lock);
-	list_add_tail(&handler->node, &ec->list);
+	list_add(&handler->node, &ec->list);
 	mutex_unlock(&ec->lock);
 	return 0;
 }
@@ -440,7 +440,6 @@ void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
 		if (query_bit == handler->query_bit) {
 			list_del(&handler->node);
 			kfree(handler);
-			break;
 		}
 	}
 	mutex_unlock(&ec->lock);

drivers/acpi/sbshc.c

@@ -0,0 +1,309 @@
+/*
+ * SMBus driver for ACPI Embedded Controller (v0.1)
+ *
+ * Copyright (c) 2007 Alexey Starikovskiy
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 2.
+ */
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/actypes.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include "sbshc.h"
+
+#define ACPI_SMB_HC_CLASS	"smbus_host_controller"
+#define ACPI_SMB_HC_DEVICE_NAME	"ACPI SMBus HC"
+
+struct acpi_smb_hc {
+	struct acpi_ec *ec;
+	struct mutex lock;
+	wait_queue_head_t wait;
+	u8 offset;
+	u8 query_bit;
+	smbus_alarm_callback callback;
+	void *context;
+};
+
+static int acpi_smbus_hc_add(struct acpi_device *device);
+static int acpi_smbus_hc_remove(struct acpi_device *device, int type);
+
+static const struct acpi_device_id sbs_device_ids[] = {
+	{"ACPI0001", 0},
+	{"ACPI0005", 0},
+	{"", 0},
+};
+
+MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
+
+static struct acpi_driver acpi_smb_hc_driver = {
+	.name = "smbus_hc",
+	.class = ACPI_SMB_HC_CLASS,
+	.ids = sbs_device_ids,
+	.ops = {
+		.add = acpi_smbus_hc_add,
+		.remove = acpi_smbus_hc_remove,
+		},
+};
+
+union acpi_smb_status {
+	u8 raw;
+	struct {
+		u8 status:5;
+		u8 reserved:1;
+		u8 alarm:1;
+		u8 done:1;
+	} fields;
+};
+
+enum acpi_smb_status_codes {
+	SMBUS_OK = 0,
+	SMBUS_UNKNOWN_FAILURE = 0x07,
+	SMBUS_DEVICE_ADDRESS_NACK = 0x10,
+	SMBUS_DEVICE_ERROR = 0x11,
+	SMBUS_DEVICE_COMMAND_ACCESS_DENIED = 0x12,
+	SMBUS_UNKNOWN_ERROR = 0x13,
+	SMBUS_DEVICE_ACCESS_DENIED = 0x17,
+	SMBUS_TIMEOUT = 0x18,
+	SMBUS_HOST_UNSUPPORTED_PROTOCOL = 0x19,
+	SMBUS_BUSY = 0x1a,
+	SMBUS_PEC_ERROR = 0x1f,
+};
+
+enum acpi_smb_offset {
+	ACPI_SMB_PROTOCOL = 0,	/* protocol, PEC */
+	ACPI_SMB_STATUS = 1,	/* status */
+	ACPI_SMB_ADDRESS = 2,	/* address */
+	ACPI_SMB_COMMAND = 3,	/* command */
+	ACPI_SMB_DATA = 4,	/* 32 data registers */
+	ACPI_SMB_BLOCK_COUNT = 0x24,	/* number of data bytes */
+	ACPI_SMB_ALARM_ADDRESS = 0x25,	/* alarm address */
+	ACPI_SMB_ALARM_DATA = 0x26,	/* 2 bytes alarm data */
+};
+
+static inline int smb_hc_read(struct acpi_smb_hc *hc, u8 address, u8 *data)
+{
+	return ec_read(hc->offset + address, data);
+}
+
+static inline int smb_hc_write(struct acpi_smb_hc *hc, u8 address, u8 data)
+{
+	return ec_write(hc->offset + address, data);
+}
+
+static inline int smb_check_done(struct acpi_smb_hc *hc)
+{
+	union acpi_smb_status status = {.raw = 0};
+	smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw);
+	return status.fields.done && (status.fields.status == SMBUS_OK);
+}
+
+static int wait_transaction_complete(struct acpi_smb_hc *hc, int timeout)
+{
+	if (wait_event_timeout(hc->wait, smb_check_done(hc),
+			       msecs_to_jiffies(timeout)))
+		return 0;
+	else
+		return -ETIME;
+}
+
+int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol, u8 address,
+		    u8 command, u8 *data, u8 length)
+{
+	int ret = -EFAULT, i;
+	u8 temp, sz = 0;
+
+	mutex_lock(&hc->lock);
+	if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))
+		goto end;
+	if (temp) {
+		ret = -EBUSY;
+		goto end;
+	}
+	smb_hc_write(hc, ACPI_SMB_COMMAND, command);
+	smb_hc_write(hc, ACPI_SMB_COMMAND, command);
+	if (!(protocol & 0x01)) {
+		smb_hc_write(hc, ACPI_SMB_BLOCK_COUNT, length);
+		for (i = 0; i < length; ++i)
+			smb_hc_write(hc, ACPI_SMB_DATA + i, data[i]);
+	}
+	smb_hc_write(hc, ACPI_SMB_ADDRESS, address << 1);
+	smb_hc_write(hc, ACPI_SMB_PROTOCOL, protocol);
+	/*
+	 * Wait for completion. Save the status code, data size,
+	 * and data into the return package (if required by the protocol).
+	 */
+	ret = wait_transaction_complete(hc, 1000);
+	if (ret || !(protocol & 0x01))
+		goto end;
+	switch (protocol) {
+	case SMBUS_RECEIVE_BYTE:
+	case SMBUS_READ_BYTE:
+		sz = 1;
+		break;
+	case SMBUS_READ_WORD:
+		sz = 2;
+		break;
+	case SMBUS_READ_BLOCK:
+		if (smb_hc_read(hc, ACPI_SMB_BLOCK_COUNT, &sz)) {
+			ret = -EFAULT;
+			goto end;
+		}
+		sz &= 0x1f;
+		break;
+	}
+	for (i = 0; i < sz; ++i)
+		smb_hc_read(hc, ACPI_SMB_DATA + i, &data[i]);
+      end:
+	mutex_unlock(&hc->lock);
+	return ret;
+}
+
+int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,
+		    u8 command, u8 *data)
+{
+	return acpi_smbus_transaction(hc, protocol, address, command, data, 0);
+}
+
+EXPORT_SYMBOL_GPL(acpi_smbus_read);
+
+int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 address,
+		     u8 command, u8 *data, u8 length)
+{
+	return acpi_smbus_transaction(hc, protocol, address, command, data, length);
+}
+
+EXPORT_SYMBOL_GPL(acpi_smbus_write);
+
+int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
+			         smbus_alarm_callback callback, void *context)
+{
+	mutex_lock(&hc->lock);
+	hc->callback = callback;
+	hc->context = context;
+	mutex_unlock(&hc->lock);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(acpi_smbus_register_callback);
+
+int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc)
+{
+	mutex_lock(&hc->lock);
+	hc->callback = NULL;
+	hc->context = NULL;
+	mutex_unlock(&hc->lock);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(acpi_smbus_unregister_callback);
+
+static void acpi_smbus_callback(void *context)
+{
+	struct acpi_smb_hc *hc = context;
+
+	if (hc->callback)
+		hc->callback(hc->context);
+}
+
+static int smbus_alarm(void *context)
+{
+	struct acpi_smb_hc *hc = context;
+	union acpi_smb_status status;
+	if (smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw))
+		return 0;
+	/* Check if it is only a completion notify */
+	if (status.fields.done)
+		wake_up(&hc->wait);
+	if (!status.fields.alarm)
+		return 0;
+	mutex_lock(&hc->lock);
+	smb_hc_write(hc, ACPI_SMB_STATUS, status.raw);
+	if (hc->callback)
+		acpi_os_execute(OSL_GPE_HANDLER, acpi_smbus_callback, hc);
+	mutex_unlock(&hc->lock);
+	return 0;
+}
+
+typedef int (*acpi_ec_query_func) (void *data);
+
+extern int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
+			      acpi_handle handle, acpi_ec_query_func func,
+			      void *data);
+
+static int acpi_smbus_hc_add(struct acpi_device *device)
+{
+	int status;
+	unsigned long val;
+	struct acpi_smb_hc *hc;
+
+	if (!device)
+		return -EINVAL;
+
+	status = acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX "error obtaining _EC.\n");
+		return -EIO;
+	}
+
+	strcpy(acpi_device_name(device), ACPI_SMB_HC_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_SMB_HC_CLASS);
+
+	hc = kzalloc(sizeof(struct acpi_smb_hc), GFP_KERNEL);
+	if (!hc)
+		return -ENOMEM;
+	mutex_init(&hc->lock);
+	init_waitqueue_head(&hc->wait);
+
+	hc->ec = acpi_driver_data(device->parent);
+	hc->offset = (val >> 8) & 0xff;
+	hc->query_bit = val & 0xff;
+	acpi_driver_data(device) = hc;
+
+	acpi_ec_add_query_handler(hc->ec, hc->query_bit, NULL, smbus_alarm, hc);
+	printk(KERN_INFO PREFIX "SBS HC: EC = 0x%p, offset = 0x%0x, query_bit = 0x%0x\n",
+		hc->ec, hc->offset, hc->query_bit);
+
+	return 0;
+}
+
+extern void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit);
+
+static int acpi_smbus_hc_remove(struct acpi_device *device, int type)
+{
+	struct acpi_smb_hc *hc;
+
+	if (!device)
+		return -EINVAL;
+
+	hc = acpi_driver_data(device);
+	acpi_ec_remove_query_handler(hc->ec, hc->query_bit);
+	kfree(hc);
+	return 0;
+}
+
+static int __init acpi_smb_hc_init(void)
+{
+	int result;
+
+	result = acpi_bus_register_driver(&acpi_smb_hc_driver);
+	if (result < 0)
+		return -ENODEV;
+	return 0;
+}
+
+static void __exit acpi_smb_hc_exit(void)
+{
+	acpi_bus_unregister_driver(&acpi_smb_hc_driver);
+}
+
+module_init(acpi_smb_hc_init);
+module_exit(acpi_smb_hc_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alexey Starikovskiy");
+MODULE_DESCRIPTION("ACPI SMBus HC driver");

drivers/acpi/sbshc.h

@@ -0,0 +1,27 @@
+struct acpi_smb_hc;
+enum acpi_smb_protocol {
+	SMBUS_WRITE_QUICK = 2,
+	SMBUS_READ_QUICK = 3,
+	SMBUS_SEND_BYTE = 4,
+	SMBUS_RECEIVE_BYTE = 5,
+	SMBUS_WRITE_BYTE = 6,
+	SMBUS_READ_BYTE = 7,
+	SMBUS_WRITE_WORD  = 8,
+	SMBUS_READ_WORD  = 9,
+	SMBUS_WRITE_BLOCK = 0xa,
+	SMBUS_READ_BLOCK = 0xb,
+	SMBUS_PROCESS_CALL = 0xc,
+	SMBUS_BLOCK_PROCESS_CALL = 0xd,
+};
+
+static const u8 SMBUS_PEC = 0x80;
+
+typedef void (*smbus_alarm_callback)(void *context);
+
+extern int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,
+	       u8 command, u8 * data);
+extern int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 slave_address,
+		u8 command, u8 * data, u8 length);
+extern int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
+			         smbus_alarm_callback callback, void *context);
+extern int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc);

include/acpi/acpi_bus.h

@@ -333,6 +333,7 @@ int acpi_bus_get_power(acpi_handle handle, int *state);
 int acpi_bus_set_power(acpi_handle handle, int state);
 #ifdef CONFIG_ACPI_PROC_EVENT
 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
+int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 int acpi_bus_receive_event(struct acpi_bus_event *event);
 #else
 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)