X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Facpi%2Fec.c;h=c9dcf9a2a4695b7494a27b712c63db4c515cfdb6;hb=c0900c3512dc8fd0b37f8fbcebc7853ed9efff10;hp=743ce27fa0bbf2915c78f4d18fdefecb1fdf133a;hpb=274ec7a8c07036bd02e8f2301456e443ef30b8a8;p=powerpc.git

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 743ce27fa0..c9dcf9a2a4 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -38,11 +38,10 @@
 #include <acpi/actypes.h>
 
 #define _COMPONENT		ACPI_EC_COMPONENT
-ACPI_MODULE_NAME("acpi_ec")
+ACPI_MODULE_NAME("ec");
 #define ACPI_EC_COMPONENT		0x00100000
 #define ACPI_EC_CLASS			"embedded_controller"
 #define ACPI_EC_HID			"PNP0C09"
-#define ACPI_EC_DRIVER_NAME		"ACPI Embedded Controller Driver"
 #define ACPI_EC_DEVICE_NAME		"Embedded Controller"
 #define ACPI_EC_FILE_INFO		"info"
 #undef PREFIX
@@ -80,7 +79,7 @@ static int acpi_ec_stop(struct acpi_device *device, int type);
 static int acpi_ec_add(struct acpi_device *device);
 
 static struct acpi_driver acpi_ec_driver = {
-	.name = ACPI_EC_DRIVER_NAME,
+	.name = "ec",
 	.class = ACPI_EC_CLASS,
 	.ids = ACPI_EC_HID,
 	.ops = {
@@ -101,7 +100,7 @@ static struct acpi_ec {
 	unsigned long global_lock;
 	struct mutex lock;
 	atomic_t query_pending;
-	atomic_t leaving_burst;	/* 0 : No, 1 : Yes, 2: abort */
+	atomic_t event_count;
 	wait_queue_head_t wait;
 } *ec_ecdt;
 
@@ -132,10 +131,12 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
 	outb(data, ec->data_addr);
 }
 
-static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
+static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event,
+				       unsigned old_count)
 {
 	u8 status = acpi_ec_read_status(ec);
-
+	if (old_count == atomic_read(&ec->event_count))
+		return 0;
 	if (event == ACPI_EC_EVENT_OBF_1) {
 		if (status & ACPI_EC_FLAG_OBF)
 			return 1;
@@ -147,19 +148,19 @@ static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
 	return 0;
 }
 
-static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event)
+static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, unsigned count)
 {
 	if (acpi_ec_mode == EC_POLL) {
 		unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
 		while (time_before(jiffies, delay)) {
-			if (acpi_ec_check_status(ec, event))
+			if (acpi_ec_check_status(ec, event, 0))
 				return 0;
 		}
 	} else {
 		if (wait_event_timeout(ec->wait,
-				       acpi_ec_check_status(ec, event),
+				       acpi_ec_check_status(ec, event, count),
 				       msecs_to_jiffies(ACPI_EC_DELAY)) ||
-		    acpi_ec_check_status(ec, event)) {
+		    acpi_ec_check_status(ec, event, 0)) {
 			return 0;
 		} else {
 			printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
@@ -171,76 +172,27 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event)
 	return -ETIME;
 }
 
-#ifdef ACPI_FUTURE_USAGE
-/*
- * Note: samsung nv5000 doesn't work with ec burst mode.
- * http://bugzilla.kernel.org/show_bug.cgi?id=4980
- */
-int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
-{
-	u8 tmp = 0;
-	u8 status = 0;
-
-	status = acpi_ec_read_status(ec);
-	if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) {
-		status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
-		if (status)
-			goto end;
-		acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE);
-		status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
-		tmp = acpi_ec_read_data(ec);
-		if (tmp != 0x90) {	/* Burst ACK byte */
-			return -EINVAL;
-		}
-	}
-
-	atomic_set(&ec->leaving_burst, 0);
-	return 0;
-      end:
-	ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode"));
-	return -1;
-}
-
-int acpi_ec_leave_burst_mode(struct acpi_ec *ec)
-{
-	u8 status = 0;
-
-	status = acpi_ec_read_status(ec);
-	if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)) {
-		status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
-		if (status)
-			goto end;
-		acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE);
-		acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
-	}
-	atomic_set(&ec->leaving_burst, 1);
-	return 0;
-      end:
-	ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode"));
-	return -1;
-}
-#endif				/* ACPI_FUTURE_USAGE */
-
 static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
 					const u8 * wdata, unsigned wdata_len,
 					u8 * rdata, unsigned rdata_len)
 {
 	int result = 0;
-
+	unsigned count = atomic_read(&ec->event_count);
 	acpi_ec_write_cmd(ec, command);
 
 	for (; wdata_len > 0; --wdata_len) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count);
 		if (result) {
 			printk(KERN_ERR PREFIX
 			       "write_cmd timeout, command = %d\n", command);
 			goto end;
 		}
+		count = atomic_read(&ec->event_count);
 		acpi_ec_write_data(ec, *(wdata++));
 	}
 
 	if (!rdata_len) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count);
 		if (result) {
 			printk(KERN_ERR PREFIX
 			       "finish-write timeout, command = %d\n", command);
@@ -251,13 +203,13 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
 	}
 
 	for (; rdata_len > 0; --rdata_len) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count);
 		if (result) {
 			printk(KERN_ERR PREFIX "read timeout, command = %d\n",
 			       command);
 			goto end;
 		}
-
+		count = atomic_read(&ec->event_count);
 		*(rdata++) = acpi_ec_read_data(ec);
 	}
       end:
@@ -280,14 +232,16 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
 	mutex_lock(&ec->lock);
 	if (ec->global_lock) {
 		status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
-		if (ACPI_FAILURE(status))
+		if (ACPI_FAILURE(status)) {
+			mutex_unlock(&ec->lock);
 			return -ENODEV;
+		}
 	}
 
 	/* Make sure GPE is enabled before doing transaction */
 	acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
 
-	status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
+	status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0);
 	if (status) {
 		printk(KERN_DEBUG PREFIX
 		       "input buffer is not empty, aborting transaction\n");
@@ -307,6 +261,21 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
 	return status;
 }
 
+/*
+ * Note: samsung nv5000 doesn't work with ec burst mode.
+ * http://bugzilla.kernel.org/show_bug.cgi?id=4980
+ */
+int acpi_ec_burst_enable(struct acpi_ec *ec)
+{
+	u8 d;
+	return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1);
+}
+
+int acpi_ec_burst_disable(struct acpi_ec *ec)
+{
+	return acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE, NULL, 0, NULL, 0);
+}
+
 static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
 {
 	int result;
@@ -328,6 +297,28 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
 /*
  * Externally callable EC access functions. For now, assume 1 EC only
  */
+int ec_burst_enable(void)
+{
+	struct acpi_ec *ec;
+	if (!first_ec)
+		return -ENODEV;
+	ec = acpi_driver_data(first_ec);
+	return acpi_ec_burst_enable(ec);
+}
+
+EXPORT_SYMBOL(ec_burst_enable);
+
+int ec_burst_disable(void)
+{
+	struct acpi_ec *ec;
+	if (!first_ec)
+		return -ENODEV;
+	ec = acpi_driver_data(first_ec);
+	return acpi_ec_burst_disable(ec);
+}
+
+EXPORT_SYMBOL(ec_burst_disable);
+
 int ec_read(u8 addr, u8 * val)
 {
 	struct acpi_ec *ec;
@@ -368,8 +359,8 @@ int ec_write(u8 addr, u8 val)
 EXPORT_SYMBOL(ec_write);
 
 int ec_transaction(u8 command,
-			  const u8 * wdata, unsigned wdata_len,
-			  u8 * rdata, unsigned rdata_len)
+		   const u8 * wdata, unsigned wdata_len,
+		   u8 * rdata, unsigned rdata_len)
 {
 	struct acpi_ec *ec;
 
@@ -415,7 +406,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
 
 static void acpi_ec_gpe_query(void *ec_cxt)
 {
-	struct acpi_ec *ec = (struct acpi_ec *)ec_cxt;
+	struct acpi_ec *ec = ec_cxt;
 	u8 value = 0;
 	char object_name[8];
 
@@ -433,7 +424,8 @@ static u32 acpi_ec_gpe_handler(void *data)
 {
 	acpi_status status = AE_OK;
 	u8 value;
-	struct acpi_ec *ec = (struct acpi_ec *)data;
+	struct acpi_ec *ec = data;
+	atomic_inc(&ec->event_count);
 
 	if (acpi_ec_mode == EC_INTR) {
 		wake_up(&ec->wait);
@@ -477,7 +469,7 @@ acpi_ec_space_handler(u32 function,
 		      void *handler_context, void *region_context)
 {
 	int result = 0;
-	struct acpi_ec *ec = NULL;
+	struct acpi_ec *ec = handler_context;
 	u64 temp = *value;
 	acpi_integer f_v = 0;
 	int i = 0;
@@ -489,8 +481,6 @@ acpi_ec_space_handler(u32 function,
 		return AE_BAD_PARAMETER;
 	}
 
-	ec = (struct acpi_ec *)handler_context;
-
       next_byte:
 	switch (function) {
 	case ACPI_READ:
@@ -546,7 +536,7 @@ static struct proc_dir_entry *acpi_ec_dir;
 
 static int acpi_ec_read_info(struct seq_file *seq, void *offset)
 {
-	struct acpi_ec *ec = (struct acpi_ec *)seq->private;
+	struct acpi_ec *ec = seq->private;
 
 	if (!ec)
 		goto end;
@@ -614,74 +604,73 @@ static int acpi_ec_remove_fs(struct acpi_device *device)
 /* --------------------------------------------------------------------------
                                Driver Interface
    -------------------------------------------------------------------------- */
+static acpi_status
+ec_parse_io_ports(struct acpi_resource *resource, void *context);
+
+static acpi_status
+ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval);
+
+static struct acpi_ec *make_acpi_ec(void)
+{
+	struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+	if (!ec)
+		return NULL;
+
+	atomic_set(&ec->query_pending, 0);
+	atomic_set(&ec->event_count, 1);
+	mutex_init(&ec->lock);
+	init_waitqueue_head(&ec->wait);
+
+	return ec;
+}
 
 static int acpi_ec_add(struct acpi_device *device)
 {
-	int result = 0;
 	acpi_status status = AE_OK;
 	struct acpi_ec *ec = NULL;
 
 	if (!device)
 		return -EINVAL;
 
-	ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+	strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_EC_CLASS);
+
+	ec = make_acpi_ec();
 	if (!ec)
 		return -ENOMEM;
 
-	ec->handle = device->handle;
-	ec->uid = -1;
-	mutex_init(&ec->lock);
-	atomic_set(&ec->query_pending, 0);
-	if (acpi_ec_mode == EC_INTR) {
-		atomic_set(&ec->leaving_burst, 1);
-		init_waitqueue_head(&ec->wait);
+	status = ec_parse_device(device->handle, 0, ec, NULL);
+	if (status != AE_CTRL_TERMINATE) {
+		kfree(ec);
+		return -EINVAL;
 	}
-	strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
-	strcpy(acpi_device_class(device), ACPI_EC_CLASS);
-	acpi_driver_data(device) = ec;
-
-	/* Use the global lock for all EC transactions? */
-	acpi_evaluate_integer(ec->handle, "_GLK", NULL, &ec->global_lock);
 
-	/* XXX we don't test uids, because on some boxes ecdt uid = 0, see:
-	   http://bugzilla.kernel.org/show_bug.cgi?id=6111 */
+	/* Check if we found the boot EC */
 	if (ec_ecdt) {
-		acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
-						  ACPI_ADR_SPACE_EC,
-						  &acpi_ec_space_handler);
+		if (ec_ecdt->gpe == ec->gpe) {
+			/* We might have incorrect info for GL at boot time */
+			mutex_lock(&ec_ecdt->lock);
+			ec_ecdt->global_lock = ec->global_lock;
+			mutex_unlock(&ec_ecdt->lock);
+			kfree(ec);
+			ec = ec_ecdt;
+		}
+	}
 
-		acpi_remove_gpe_handler(NULL, ec_ecdt->gpe,
-					&acpi_ec_gpe_handler);
+	ec->handle = device->handle;
 
-		kfree(ec_ecdt);
-	}
+	acpi_driver_data(device) = ec;
 
-	/* Get GPE bit assignment (EC events). */
-	/* TODO: Add support for _GPE returning a package */
-	status = acpi_evaluate_integer(ec->handle, "_GPE", NULL, &ec->gpe);
-	if (ACPI_FAILURE(status)) {
-		ACPI_EXCEPTION((AE_INFO, status,
-				"Obtaining GPE bit assignment"));
-		result = -ENODEV;
-		goto end;
-	}
+	if (!first_ec)
+		first_ec = device;
 
-	result = acpi_ec_add_fs(device);
-	if (result)
-		goto end;
+	acpi_ec_add_fs(device);
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
 			  acpi_device_name(device), acpi_device_bid(device),
 			  (u32) ec->gpe));
 
-	if (!first_ec)
-		first_ec = device;
-
-      end:
-	if (result)
-		kfree(ec);
-
-	return result;
+	return 0;
 }
 
 static int acpi_ec_remove(struct acpi_device *device, int type)
@@ -695,15 +684,21 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
 
 	acpi_ec_remove_fs(device);
 
-	kfree(ec);
+	acpi_driver_data(device) = NULL;
+	if (device == first_ec)
+		first_ec = NULL;
+
+	/* Don't touch boot EC */
+	if (ec_ecdt != ec)
+		kfree(ec);
 
 	return 0;
 }
 
 static acpi_status
-acpi_ec_io_ports(struct acpi_resource *resource, void *context)
+ec_parse_io_ports(struct acpi_resource *resource, void *context)
 {
-	struct acpi_ec *ec = (struct acpi_ec *)context;
+	struct acpi_ec *ec = context;
 
 	if (resource->type != ACPI_RESOURCE_TYPE_IO) {
 		return AE_OK;
@@ -725,42 +720,14 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context)
 	return AE_OK;
 }
 
-static int acpi_ec_start(struct acpi_device *device)
+static int ec_install_handlers(struct acpi_ec *ec)
 {
-	acpi_status status = AE_OK;
-	struct acpi_ec *ec = NULL;
-
-	if (!device)
-		return -EINVAL;
-
-	ec = acpi_driver_data(device);
-
-	if (!ec)
-		return -EINVAL;
-
-	/*
-	 * Get I/O port addresses. Convert to GAS format.
-	 */
-	status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS,
-				     acpi_ec_io_ports, ec);
-	if (ACPI_FAILURE(status) || ec->command_addr == 0) {
-		ACPI_EXCEPTION((AE_INFO, status,
-				"Error getting I/O port addresses"));
-		return -ENODEV;
-	}
-
-	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx",
-			  ec->gpe, ec->command_addr, ec->data_addr));
-
-	/*
-	 * Install GPE handler
-	 */
+	acpi_status status;
 	status = acpi_install_gpe_handler(NULL, ec->gpe,
 					  ACPI_GPE_EDGE_TRIGGERED,
 					  &acpi_ec_gpe_handler, ec);
-	if (ACPI_FAILURE(status)) {
+	if (ACPI_FAILURE(status))
 		return -ENODEV;
-	}
 	acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
 	acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
 
@@ -773,18 +740,46 @@ static int acpi_ec_start(struct acpi_device *device)
 		return -ENODEV;
 	}
 
-	return AE_OK;
+	return 0;
+}
+
+static int acpi_ec_start(struct acpi_device *device)
+{
+	struct acpi_ec *ec;
+
+	if (!device)
+		return -EINVAL;
+
+	ec = acpi_driver_data(device);
+
+	if (!ec)
+		return -EINVAL;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx",
+			  ec->gpe, ec->command_addr, ec->data_addr));
+
+	/* Boot EC is already working */
+	if (ec == ec_ecdt)
+		return 0;
+
+	return ec_install_handlers(ec);
 }
 
 static int acpi_ec_stop(struct acpi_device *device, int type)
 {
-	acpi_status status = AE_OK;
-	struct acpi_ec *ec = NULL;
+	acpi_status status;
+	struct acpi_ec *ec;
 
 	if (!device)
 		return -EINVAL;
 
 	ec = acpi_driver_data(device);
+	if (!ec)
+		return -EINVAL;
+
+	/* Don't touch boot EC */
+	if (ec == ec_ecdt)
+		return 0;
 
 	status = acpi_remove_address_space_handler(ec->handle,
 						   ACPI_ADR_SPACE_EC,
@@ -799,160 +794,64 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
 	return 0;
 }
 
-static acpi_status __init
-acpi_fake_ecdt_callback(acpi_handle handle,
-			u32 Level, void *context, void **retval)
+static acpi_status
+ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 {
 	acpi_status status;
 
-	mutex_init(&ec_ecdt->lock);
-	if (acpi_ec_mode == EC_INTR) {
-		init_waitqueue_head(&ec_ecdt->wait);
-	}
+	struct acpi_ec *ec = context;
 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
-				     acpi_ec_io_ports, ec_ecdt);
+				     ec_parse_io_ports, ec);
 	if (ACPI_FAILURE(status))
 		return status;
 
-	ec_ecdt->uid = -1;
-	acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
-
-	status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe);
+	/* Get GPE bit assignment (EC events). */
+	/* TODO: Add support for _GPE returning a package */
+	status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe);
 	if (ACPI_FAILURE(status))
 		return status;
-	ec_ecdt->global_lock = TRUE;
-	ec_ecdt->handle = handle;
-
-	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx",
-			  ec_ecdt->gpe, ec_ecdt->command_addr,
-			  ec_ecdt->data_addr));
 
-	return AE_CTRL_TERMINATE;
-}
-
-/*
- * Some BIOS (such as some from Gateway laptops) access EC region very early
- * such as in BAT0._INI or EC._INI before an EC device is found and
- * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily
- * required, but if EC regison is accessed early, it is required.
- * The routine tries to workaround the BIOS bug by pre-scan EC device
- * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any
- * op region (since _REG isn't invoked yet). The assumption is true for
- * all systems found.
- */
-static int __init acpi_ec_fake_ecdt(void)
-{
-	acpi_status status;
-	int ret = 0;
+	/* Use the global lock for all EC transactions? */
+	acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);
 
-	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
+	ec->handle = handle;
 
-	ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
-	if (!ec_ecdt) {
-		ret = -ENOMEM;
-		goto error;
-	}
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx",
+			  ec->gpe, ec->command_addr, ec->data_addr));
 
-	status = acpi_get_devices(ACPI_EC_HID,
-				  acpi_fake_ecdt_callback, NULL, NULL);
-	if (ACPI_FAILURE(status)) {
-		kfree(ec_ecdt);
-		ec_ecdt = NULL;
-		ret = -ENODEV;
-		ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT"));
-		goto error;
-	}
-	return 0;
-      error:
-	return ret;
+	return AE_CTRL_TERMINATE;
 }
 
-static int __init acpi_ec_get_real_ecdt(void)
+int __init acpi_ec_ecdt_probe(void)
 {
+	int ret;
 	acpi_status status;
 	struct acpi_table_ecdt *ecdt_ptr;
 
+	ec_ecdt = make_acpi_ec();
+	if (!ec_ecdt)
+		return -ENOMEM;
+	/*
+	 * Generate a boot ec context
+	 */
+
 	status = acpi_get_table(ACPI_SIG_ECDT, 1,
 				(struct acpi_table_header **)&ecdt_ptr);
 	if (ACPI_FAILURE(status))
-		return -ENODEV;
+		goto error;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT"));
 
-	/*
-	 * Generate a temporary ec context to use until the namespace is scanned
-	 */
-	ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
-	if (!ec_ecdt)
-		return -ENOMEM;
-
-	mutex_init(&ec_ecdt->lock);
-	if (acpi_ec_mode == EC_INTR) {
-		init_waitqueue_head(&ec_ecdt->wait);
-	}
 	ec_ecdt->command_addr = ecdt_ptr->control.address;
 	ec_ecdt->data_addr = ecdt_ptr->data.address;
 	ec_ecdt->gpe = ecdt_ptr->gpe;
-	/* use the GL just to be safe */
-	ec_ecdt->global_lock = TRUE;
 	ec_ecdt->uid = ecdt_ptr->uid;
+	ec_ecdt->handle = ACPI_ROOT_OBJECT;
 
-	status = acpi_get_handle(NULL, ecdt_ptr->id, &ec_ecdt->handle);
-	if (ACPI_FAILURE(status)) {
-		goto error;
-	}
-
-	return 0;
-      error:
-	ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
-	kfree(ec_ecdt);
-	ec_ecdt = NULL;
-
-	return -ENODEV;
-}
-
-static int __initdata acpi_fake_ecdt_enabled;
-int __init acpi_ec_ecdt_probe(void)
-{
-	acpi_status status;
-	int ret;
-
-	ret = acpi_ec_get_real_ecdt();
-	/* Try to make a fake ECDT */
-	if (ret && acpi_fake_ecdt_enabled) {
-		ret = acpi_ec_fake_ecdt();
-	}
-
-	if (ret)
+	ret = ec_install_handlers(ec_ecdt);
+	if (!ret)
 		return 0;
-
-	/*
-	 * Install GPE handler
-	 */
-	status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe,
-					  ACPI_GPE_EDGE_TRIGGERED,
-					  &acpi_ec_gpe_handler, ec_ecdt);
-	if (ACPI_FAILURE(status)) {
-		goto error;
-	}
-	acpi_set_gpe_type(NULL, ec_ecdt->gpe, ACPI_GPE_TYPE_RUNTIME);
-	acpi_enable_gpe(NULL, ec_ecdt->gpe, ACPI_NOT_ISR);
-
-	status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
-						    ACPI_ADR_SPACE_EC,
-						    &acpi_ec_space_handler,
-						    &acpi_ec_space_setup,
-						    ec_ecdt);
-	if (ACPI_FAILURE(status)) {
-		acpi_remove_gpe_handler(NULL, ec_ecdt->gpe,
-					&acpi_ec_gpe_handler);
-		goto error;
-	}
-
-	return 0;
-
       error:
-	ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
 	kfree(ec_ecdt);
 	ec_ecdt = NULL;
 
@@ -995,13 +894,6 @@ static void __exit acpi_ec_exit(void)
 }
 #endif				/* 0 */
 
-static int __init acpi_fake_ecdt_setup(char *str)
-{
-	acpi_fake_ecdt_enabled = 1;
-	return 1;
-}
-
-__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup);
 static int __init acpi_ec_set_intr_mode(char *str)
 {
 	int intr;
@@ -1009,14 +901,9 @@ static int __init acpi_ec_set_intr_mode(char *str)
 	if (!get_option(&str, &intr))
 		return 0;
 
-	if (intr) {
-		acpi_ec_mode = EC_INTR;
-	} else {
-		acpi_ec_mode = EC_POLL;
-	}
-	acpi_ec_driver.ops.add = acpi_ec_add;
-	printk(KERN_NOTICE PREFIX "%s mode.\n",
-			  intr ? "interrupt" : "polling");
+	acpi_ec_mode = (intr) ? EC_INTR : EC_POLL;
+
+	printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling");
 
 	return 1;
 }