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WSL2-Linux-Kernel
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Pull ec into release branch

This commit is contained in:
Len Brown 2007-04-28 23:12:56 -04:00
Родитель fb16596997 9fd9f8e8bd
Коммит 03feb05246
2 изменённых файлов: 183 добавлений и 323 удалений
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3
drivers/acpi/Makefile
Просмотреть файл

@ -38,10 +38,11 @@ endif
obj-y += sleep/ obj-y += sleep/
obj-y += bus.o glue.o obj-y += bus.o glue.o
obj-y += scan.o obj-y += scan.o
# Keep EC driver first. Initialization of others depend on it.
obj-$(CONFIG_ACPI_EC) += ec.o
obj-$(CONFIG_ACPI_AC) += ac.o obj-$(CONFIG_ACPI_AC) += ac.o
obj-$(CONFIG_ACPI_BATTERY) += battery.o obj-$(CONFIG_ACPI_BATTERY) += battery.o
obj-$(CONFIG_ACPI_BUTTON) += button.o obj-$(CONFIG_ACPI_BUTTON) += button.o
obj-$(CONFIG_ACPI_EC) += ec.o
obj-$(CONFIG_ACPI_FAN) += fan.o obj-$(CONFIG_ACPI_FAN) += fan.o
obj-$(CONFIG_ACPI_DOCK) += dock.o obj-$(CONFIG_ACPI_DOCK) += dock.o
obj-$(CONFIG_ACPI_BAY) += bay.o obj-$(CONFIG_ACPI_BAY) += bay.o

499
drivers/acpi/ec.c
Просмотреть файл

@ -1,6 +1,8 @@
/* /*
* acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $) * ec.c - ACPI Embedded Controller Driver (v2.0)
* *
* Copyright (C) 2006, 2007 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
* Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com>
* Copyright (C) 2004 Luming Yu <luming.yu@intel.com> * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
@ -91,9 +93,9 @@ static struct acpi_driver acpi_ec_driver = {
}; };
/* If we find an EC via the ECDT, we need to keep a ptr to its context */ /* If we find an EC via the ECDT, we need to keep a ptr to its context */
/* External interfaces use first EC only, so remember */
static struct acpi_ec { static struct acpi_ec {
acpi_handle handle; acpi_handle handle;
unsigned long uid;
unsigned long gpe; unsigned long gpe;
unsigned long command_addr; unsigned long command_addr;
unsigned long data_addr; unsigned long data_addr;
@ -101,12 +103,8 @@ static struct acpi_ec {
struct mutex lock; struct mutex lock;
atomic_t query_pending; atomic_t query_pending;
atomic_t event_count; atomic_t event_count;
atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */
wait_queue_head_t wait; wait_queue_head_t wait;
} *ec_ecdt; } *boot_ec, *first_ec;
/* External interfaces use first EC only, so remember */
static struct acpi_device *first_ec;
/* -------------------------------------------------------------------------- /* --------------------------------------------------------------------------
Transaction Management Transaction Management
@ -173,56 +171,6 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, unsigned count)
return -ETIME; 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, static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
const u8 * wdata, unsigned wdata_len, const u8 * wdata, unsigned wdata_len,
u8 * rdata, unsigned rdata_len) u8 * rdata, unsigned rdata_len)
@ -312,6 +260,21 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
return status; 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) static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
{ {
int result; int result;
@ -333,18 +296,33 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
/* /*
* Externally callable EC access functions. For now, assume 1 EC only * Externally callable EC access functions. For now, assume 1 EC only
*/ */
int ec_burst_enable(void)
{
if (!first_ec)
return -ENODEV;
return acpi_ec_burst_enable(first_ec);
}
EXPORT_SYMBOL(ec_burst_enable);
int ec_burst_disable(void)
{
if (!first_ec)
return -ENODEV;
return acpi_ec_burst_disable(first_ec);
}
EXPORT_SYMBOL(ec_burst_disable);
int ec_read(u8 addr, u8 * val) int ec_read(u8 addr, u8 * val)
{ {
struct acpi_ec *ec;
int err; int err;
u8 temp_data; u8 temp_data;
if (!first_ec) if (!first_ec)
return -ENODEV; return -ENODEV;
ec = acpi_driver_data(first_ec); err = acpi_ec_read(first_ec, addr, &temp_data);
err = acpi_ec_read(ec, addr, &temp_data);
if (!err) { if (!err) {
*val = temp_data; *val = temp_data;
@ -357,15 +335,12 @@ EXPORT_SYMBOL(ec_read);
int ec_write(u8 addr, u8 val) int ec_write(u8 addr, u8 val)
{ {
struct acpi_ec *ec;
int err; int err;
if (!first_ec) if (!first_ec)
return -ENODEV; return -ENODEV;
ec = acpi_driver_data(first_ec); err = acpi_ec_write(first_ec, addr, val);
err = acpi_ec_write(ec, addr, val);
return err; return err;
} }
@ -376,14 +351,10 @@ int ec_transaction(u8 command,
const u8 * wdata, unsigned wdata_len, const u8 * wdata, unsigned wdata_len,
u8 * rdata, unsigned rdata_len) u8 * rdata, unsigned rdata_len)
{ {
struct acpi_ec *ec;
if (!first_ec) if (!first_ec)
return -ENODEV; return -ENODEV;
ec = acpi_driver_data(first_ec); return acpi_ec_transaction(first_ec, command, wdata,
return acpi_ec_transaction(ec, command, wdata,
wdata_len, rdata, rdata_len); wdata_len, rdata, rdata_len);
} }
@ -420,7 +391,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
static void acpi_ec_gpe_query(void *ec_cxt) 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; u8 value = 0;
char object_name[8]; char object_name[8];
@ -438,8 +409,9 @@ static u32 acpi_ec_gpe_handler(void *data)
{ {
acpi_status status = AE_OK; acpi_status status = AE_OK;
u8 value; u8 value;
struct acpi_ec *ec = (struct acpi_ec *)data; struct acpi_ec *ec = data;
atomic_inc(&ec->event_count); atomic_inc(&ec->event_count);
if (acpi_ec_mode == EC_INTR) { if (acpi_ec_mode == EC_INTR) {
wake_up(&ec->wait); wake_up(&ec->wait);
} }
@ -482,7 +454,7 @@ acpi_ec_space_handler(u32 function,
void *handler_context, void *region_context) void *handler_context, void *region_context)
{ {
int result = 0; int result = 0;
struct acpi_ec *ec = NULL; struct acpi_ec *ec = handler_context;
u64 temp = *value; u64 temp = *value;
acpi_integer f_v = 0; acpi_integer f_v = 0;
int i = 0; int i = 0;
@ -494,8 +466,6 @@ acpi_ec_space_handler(u32 function,
return AE_BAD_PARAMETER; return AE_BAD_PARAMETER;
} }
ec = (struct acpi_ec *)handler_context;
next_byte: next_byte:
switch (function) { switch (function) {
case ACPI_READ: case ACPI_READ:
@ -551,18 +521,16 @@ static struct proc_dir_entry *acpi_ec_dir;
static int acpi_ec_read_info(struct seq_file *seq, void *offset) 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) if (!ec)
goto end; goto end;
seq_printf(seq, "gpe: 0x%02x\n", (u32) ec->gpe); seq_printf(seq, "gpe:\t\t\t0x%02x\n", (u32) ec->gpe);
seq_printf(seq, "ports: 0x%02x, 0x%02x\n", seq_printf(seq, "ports:\t\t\t0x%02x, 0x%02x\n",
(u32) ec->command_addr, (u32) ec->data_addr); (unsigned)ec->command_addr, (unsigned)ec->data_addr);
seq_printf(seq, "use global lock: %s\n", seq_printf(seq, "use global lock:\t%s\n",
ec->global_lock ? "yes" : "no"); ec->global_lock ? "yes" : "no");
acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
end: end:
return 0; return 0;
} }
@ -619,154 +587,122 @@ static int acpi_ec_remove_fs(struct acpi_device *device)
/* -------------------------------------------------------------------------- /* --------------------------------------------------------------------------
Driver Interface 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, 1);
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) static int acpi_ec_add(struct acpi_device *device)
{ {
int result = 0;
acpi_status status = AE_OK; acpi_status status = AE_OK;
struct acpi_ec *ec = NULL; struct acpi_ec *ec = NULL;
if (!device) if (!device)
return -EINVAL; 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) if (!ec)
return -ENOMEM; return -ENOMEM;
ec->handle = device->handle; status = ec_parse_device(device->handle, 0, ec, NULL);
ec->uid = -1; if (status != AE_CTRL_TERMINATE) {
mutex_init(&ec->lock); kfree(ec);
atomic_set(&ec->query_pending, 0); return -EINVAL;
atomic_set(&ec->event_count, 1);
if (acpi_ec_mode == EC_INTR) {
atomic_set(&ec->leaving_burst, 1);
init_waitqueue_head(&ec->wait);
} }
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_CLASS); /* Check if we found the boot EC */
if (boot_ec) {
if (boot_ec->gpe == ec->gpe) {
/* We might have incorrect info for GL at boot time */
mutex_lock(&boot_ec->lock);
boot_ec->global_lock = ec->global_lock;
mutex_unlock(&boot_ec->lock);
kfree(ec);
ec = boot_ec;
}
} else
first_ec = ec;
ec->handle = device->handle;
acpi_driver_data(device) = ec; acpi_driver_data(device) = ec;
/* Use the global lock for all EC transactions? */ acpi_ec_add_fs(device);
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 */
if (ec_ecdt) {
acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler);
acpi_remove_gpe_handler(NULL, ec_ecdt->gpe,
&acpi_ec_gpe_handler);
kfree(ec_ecdt);
}
/* 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;
}
result = acpi_ec_add_fs(device);
if (result)
goto end;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.", ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
acpi_device_name(device), acpi_device_bid(device), acpi_device_name(device), acpi_device_bid(device),
(u32) ec->gpe)); (u32) ec->gpe));
if (!first_ec) return 0;
first_ec = device;
end:
if (result)
kfree(ec);
return result;
} }
static int acpi_ec_remove(struct acpi_device *device, int type) static int acpi_ec_remove(struct acpi_device *device, int type)
{ {
struct acpi_ec *ec = NULL; struct acpi_ec *ec;
if (!device) if (!device)
return -EINVAL; return -EINVAL;
ec = acpi_driver_data(device); ec = acpi_driver_data(device);
acpi_ec_remove_fs(device); acpi_ec_remove_fs(device);
acpi_driver_data(device) = NULL;
if (ec == first_ec)
first_ec = NULL;
kfree(ec); /* Don't touch boot EC */
if (boot_ec != ec)
kfree(ec);
return 0; return 0;
} }
static acpi_status 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) { if (resource->type != ACPI_RESOURCE_TYPE_IO)
return AE_OK; return AE_OK;
}
/* /*
* The first address region returned is the data port, and * The first address region returned is the data port, and
* the second address region returned is the status/command * the second address region returned is the status/command
* port. * port.
*/ */
if (ec->data_addr == 0) { if (ec->data_addr == 0)
ec->data_addr = resource->data.io.minimum; ec->data_addr = resource->data.io.minimum;
} else if (ec->command_addr == 0) { else if (ec->command_addr == 0)
ec->command_addr = resource->data.io.minimum; ec->command_addr = resource->data.io.minimum;
} else { else
return AE_CTRL_TERMINATE; return AE_CTRL_TERMINATE;
}
return AE_OK; 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; acpi_status status;
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
*/
status = acpi_install_gpe_handler(NULL, ec->gpe, status = acpi_install_gpe_handler(NULL, ec->gpe,
ACPI_GPE_EDGE_TRIGGERED, ACPI_GPE_EDGE_TRIGGERED,
&acpi_ec_gpe_handler, ec); &acpi_ec_gpe_handler, ec);
if (ACPI_FAILURE(status)) { if (ACPI_FAILURE(status))
return -ENODEV; return -ENODEV;
}
acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
@ -779,19 +715,50 @@ static int acpi_ec_start(struct acpi_device *device)
return -ENODEV; return -ENODEV;
} }
return AE_OK; /* EC is fully operational, allow queries */
atomic_set(&ec->query_pending, 0);
return 0;
} }
static int acpi_ec_stop(struct acpi_device *device, int type) static int acpi_ec_start(struct acpi_device *device)
{ {
acpi_status status = AE_OK; struct acpi_ec *ec;
struct acpi_ec *ec = NULL;
if (!device) if (!device)
return -EINVAL; return -EINVAL;
ec = acpi_driver_data(device); 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 == boot_ec)
return 0;
return ec_install_handlers(ec);
}
static int acpi_ec_stop(struct acpi_device *device, int type)
{
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 == boot_ec)
return 0;
status = acpi_remove_address_space_handler(ec->handle, status = acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler); &acpi_ec_space_handler);
@ -805,164 +772,67 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
return 0; return 0;
} }
static acpi_status __init static acpi_status
acpi_fake_ecdt_callback(acpi_handle handle, ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
u32 Level, void *context, void **retval)
{ {
acpi_status status; acpi_status status;
mutex_init(&ec_ecdt->lock); struct acpi_ec *ec = context;
atomic_set(&ec_ecdt->event_count, 1);
if (acpi_ec_mode == EC_INTR) {
init_waitqueue_head(&ec_ecdt->wait);
}
status = acpi_walk_resources(handle, METHOD_NAME__CRS, status = acpi_walk_resources(handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec_ecdt); ec_parse_io_ports, ec);
if (ACPI_FAILURE(status)) if (ACPI_FAILURE(status))
return status; return status;
ec_ecdt->uid = -1; /* Get GPE bit assignment (EC events). */
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid); /* TODO: Add support for _GPE returning a package */
status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe);
status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe);
if (ACPI_FAILURE(status)) if (ACPI_FAILURE(status))
return status; return status;
ec_ecdt->global_lock = TRUE;
ec_ecdt->handle = handle; /* Use the global lock for all EC transactions? */
acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);
ec->handle = handle;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx",
ec_ecdt->gpe, ec_ecdt->command_addr, ec->gpe, ec->command_addr, ec->data_addr));
ec_ecdt->data_addr));
return AE_CTRL_TERMINATE; return AE_CTRL_TERMINATE;
} }
/* int __init acpi_ec_ecdt_probe(void)
* 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;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
if (!ec_ecdt) {
ret = -ENOMEM;
goto error;
}
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;
}
static int __init acpi_ec_get_real_ecdt(void)
{ {
int ret;
acpi_status status; acpi_status status;
struct acpi_table_ecdt *ecdt_ptr; struct acpi_table_ecdt *ecdt_ptr;
boot_ec = make_acpi_ec();
if (!boot_ec)
return -ENOMEM;
/*
* Generate a boot ec context
*/
status = acpi_get_table(ACPI_SIG_ECDT, 1, status = acpi_get_table(ACPI_SIG_ECDT, 1,
(struct acpi_table_header **)&ecdt_ptr); (struct acpi_table_header **)&ecdt_ptr);
if (ACPI_FAILURE(status)) if (ACPI_FAILURE(status))
return -ENODEV; goto error;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT"));
/* boot_ec->command_addr = ecdt_ptr->control.address;
* Generate a temporary ec context to use until the namespace is scanned boot_ec->data_addr = ecdt_ptr->data.address;
*/ boot_ec->gpe = ecdt_ptr->gpe;
ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); boot_ec->handle = ACPI_ROOT_OBJECT;
if (!ec_ecdt)
return -ENOMEM;
mutex_init(&ec_ecdt->lock); ret = ec_install_handlers(boot_ec);
atomic_set(&ec_ecdt->event_count, 1); if (!ret) {
if (acpi_ec_mode == EC_INTR) { first_ec = boot_ec;
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;
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)
return 0; 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: error:
ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); kfree(boot_ec);
kfree(ec_ecdt); boot_ec = NULL;
ec_ecdt = NULL;
return -ENODEV; return -ENODEV;
} }
@ -1003,13 +873,6 @@ static void __exit acpi_ec_exit(void)
} }
#endif /* 0 */ #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) static int __init acpi_ec_set_intr_mode(char *str)
{ {
int intr; int intr;
@ -1017,12 +880,8 @@ static int __init acpi_ec_set_intr_mode(char *str)
if (!get_option(&str, &intr)) if (!get_option(&str, &intr))
return 0; return 0;
if (intr) { acpi_ec_mode = (intr) ? EC_INTR : EC_POLL;
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"); printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling");
return 1; return 1;