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Pull ec into release branch

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This commit is contained in:
Len Brown 2007-07-22 02:24:51 -04:00
commit 2e85622042
2 changed files with 151 additions and 106 deletions
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6
MAINTAINERS
View File

@ -225,15 +225,15 @@ T: git kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
S: Supported
ACPI BATTERY DRIVERS
P: Vladimir P. Lebedev
M: vladimir.p.lebedev@intel.com
P: Alexey Starikovskiy
M: astarikovskiy@suse.de
L: linux-acpi@vger.kernel.org
W: http://acpi.sourceforge.net/
S: Supported
ACPI EC DRIVER
P: Alexey Starikovskiy
M: alexey.y.starikovskiy@linux.intel.com
M: astarikovskiy@suse.de
L: linux-acpi@vger.kernel.org
W: http://acpi.sourceforge.net/
S: Supported

251
drivers/acpi/ec.c
View File

@ -34,25 +34,26 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <asm/io.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/actypes.h>
#define _COMPONENT ACPI_EC_COMPONENT
ACPI_MODULE_NAME("ec");
#define ACPI_EC_COMPONENT 0x00100000
#define ACPI_EC_CLASS "embedded_controller"
#define ACPI_EC_HID "PNP0C09"
#define ACPI_EC_DEVICE_NAME "Embedded Controller"
#define ACPI_EC_FILE_INFO "info"
#undef PREFIX
#define PREFIX "ACPI: EC: "
/* EC status register */
#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */
#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */
#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */
#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */
/* EC commands */
enum ec_command {
ACPI_EC_COMMAND_READ = 0x80,
@ -61,6 +62,7 @@ enum ec_command {
ACPI_EC_BURST_DISABLE = 0x83,
ACPI_EC_COMMAND_QUERY = 0x84,
};
/* EC events */
enum ec_event {
ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */
@ -94,6 +96,16 @@ static struct acpi_driver acpi_ec_driver = {
/* 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 */
typedef int (*acpi_ec_query_func) (void *data);
struct acpi_ec_query_handler {
struct list_head node;
acpi_ec_query_func func;
acpi_handle handle;
void *data;
u8 query_bit;
};
static struct acpi_ec {
acpi_handle handle;
unsigned long gpe;
@ -104,6 +116,7 @@ static struct acpi_ec {
atomic_t query_pending;
atomic_t event_count;
wait_queue_head_t wait;
struct list_head list;
} *boot_ec, *first_ec;
/* --------------------------------------------------------------------------
@ -245,7 +258,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0, 0);
if (status) {
printk(KERN_DEBUG PREFIX
printk(KERN_ERR PREFIX
"input buffer is not empty, aborting transaction\n");
goto end;
}
@ -394,21 +407,67 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
/* --------------------------------------------------------------------------
Event Management
-------------------------------------------------------------------------- */
int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
acpi_handle handle, acpi_ec_query_func func,
void *data)
{
struct acpi_ec_query_handler *handler =
kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL);
if (!handler)
return -ENOMEM;
handler->query_bit = query_bit;
handler->handle = handle;
handler->func = func;
handler->data = data;
mutex_lock(&ec->lock);
list_add_tail(&handler->node, &ec->list);
mutex_unlock(&ec->lock);
return 0;
}
EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler);
void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
{
struct acpi_ec_query_handler *handler;
mutex_lock(&ec->lock);
list_for_each_entry(handler, &ec->list, node) {
if (query_bit == handler->query_bit) {
list_del(&handler->node);
kfree(handler);
break;
}
}
mutex_unlock(&ec->lock);
}
EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
static void acpi_ec_gpe_query(void *ec_cxt)
{
struct acpi_ec *ec = ec_cxt;
u8 value = 0;
char object_name[8];
struct acpi_ec_query_handler *handler, copy;
if (!ec || acpi_ec_query(ec, &value))
return;
snprintf(object_name, 8, "_Q%2.2X", value);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s", object_name));
acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
mutex_lock(&ec->lock);
list_for_each_entry(handler, &ec->list, node) {
if (value == handler->query_bit) {
/* have custom handler for this bit */
memcpy(&copy, handler, sizeof(copy));
mutex_unlock(&ec->lock);
if (copy.func) {
copy.func(copy.data);
} else if (copy.handle) {
acpi_evaluate_object(copy.handle, NULL, NULL, NULL);
}
return;
}
}
mutex_unlock(&ec->lock);
printk(KERN_ERR PREFIX "Handler for query 0x%x is not found!\n", value);
}
static u32 acpi_ec_gpe_handler(void *data)
@ -427,8 +486,7 @@ static u32 acpi_ec_gpe_handler(void *data)
if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) {
atomic_set(&ec->query_pending, 1);
status =
acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query,
ec);
acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
}
return status == AE_OK ?
@ -454,57 +512,35 @@ acpi_ec_space_setup(acpi_handle region_handle,
}
static acpi_status
acpi_ec_space_handler(u32 function,
acpi_physical_address address,
u32 bit_width,
acpi_integer * value,
acpi_ec_space_handler(u32 function, acpi_physical_address address,
u32 bits, acpi_integer *value,
void *handler_context, void *region_context)
{
int result = 0;
struct acpi_ec *ec = handler_context;
u64 temp = *value;
acpi_integer f_v = 0;
int i = 0;
int result = 0, i = 0;
u8 temp = 0;
if ((address > 0xFF) || !value || !handler_context)
return AE_BAD_PARAMETER;
if (bit_width != 8 && acpi_strict) {
if (function != ACPI_READ && function != ACPI_WRITE)
return AE_BAD_PARAMETER;
if (bits != 8 && acpi_strict)
return AE_BAD_PARAMETER;
while (bits - i > 0) {
if (function == ACPI_READ) {
result = acpi_ec_read(ec, address, &temp);
(*value) |= ((acpi_integer)temp) << i;
} else {
temp = 0xff & ((*value) >> i);
result = acpi_ec_write(ec, address, temp);
}
i += 8;
++address;
}
next_byte:
switch (function) {
case ACPI_READ:
temp = 0;
result = acpi_ec_read(ec, (u8) address, (u8 *) & temp);
break;
case ACPI_WRITE:
result = acpi_ec_write(ec, (u8) address, (u8) temp);
break;
default:
result = -EINVAL;
goto out;
break;
}
bit_width -= 8;
if (bit_width) {
if (function == ACPI_READ)
f_v |= temp << 8 * i;
if (function == ACPI_WRITE)
temp >>= 8;
i++;
address++;
goto next_byte;
}
if (function == ACPI_READ) {
f_v |= temp << 8 * i;
*value = f_v;
}
out:
switch (result) {
case -EINVAL:
return AE_BAD_PARAMETER;
@ -597,9 +633,6 @@ static int acpi_ec_remove_fs(struct acpi_device *device)
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);
@ -610,13 +643,52 @@ static struct acpi_ec *make_acpi_ec(void)
atomic_set(&ec->event_count, 1);
mutex_init(&ec->lock);
init_waitqueue_head(&ec->wait);
INIT_LIST_HEAD(&ec->list);
return ec;
}
static acpi_status
acpi_ec_register_query_methods(acpi_handle handle, u32 level,
void *context, void **return_value)
{
struct acpi_namespace_node *node = handle;
struct acpi_ec *ec = context;
int value = 0;
if (sscanf(node->name.ascii, "_Q%x", &value) == 1) {
acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
}
return AE_OK;
}
static int ec_parse_device(struct acpi_ec *ec, acpi_handle handle)
{
if (ACPI_FAILURE(acpi_walk_resources(handle, METHOD_NAME__CRS,
ec_parse_io_ports, ec)))
return -EINVAL;
/* Get GPE bit assignment (EC events). */
/* TODO: Add support for _GPE returning a package */
if (ACPI_FAILURE(acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe)))
return -EINVAL;
/* Use the global lock for all EC transactions? */
acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);
/* Find and register all query methods */
acpi_walk_namespace(ACPI_TYPE_METHOD, handle, 1,
acpi_ec_register_query_methods, ec, NULL);
ec->handle = handle;
printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx",
ec->gpe, ec->command_addr, ec->data_addr);
return 0;
}
static int acpi_ec_add(struct acpi_device *device)
{
acpi_status status = AE_OK;
struct acpi_ec *ec = NULL;
if (!device)
@ -629,8 +701,7 @@ static int acpi_ec_add(struct acpi_device *device)
if (!ec)
return -ENOMEM;
status = ec_parse_device(device->handle, 0, ec, NULL);
if (status != AE_CTRL_TERMINATE) {
if (ec_parse_device(ec, device->handle)) {
kfree(ec);
return -EINVAL;
}
@ -641,6 +712,8 @@ static int acpi_ec_add(struct acpi_device *device)
/* We might have incorrect info for GL at boot time */
mutex_lock(&boot_ec->lock);
boot_ec->global_lock = ec->global_lock;
/* Copy handlers from new ec into boot ec */
list_splice(&ec->list, &boot_ec->list);
mutex_unlock(&boot_ec->lock);
kfree(ec);
ec = boot_ec;
@ -651,22 +724,24 @@ static int acpi_ec_add(struct acpi_device *device)
acpi_driver_data(device) = ec;
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));
return 0;
}
static int acpi_ec_remove(struct acpi_device *device, int type)
{
struct acpi_ec *ec;
struct acpi_ec_query_handler *handler;
if (!device)
return -EINVAL;
ec = acpi_driver_data(device);
mutex_lock(&ec->lock);
list_for_each_entry(handler, &ec->list, node) {
list_del(&handler->node);
kfree(handler);
}
mutex_unlock(&ec->lock);
acpi_ec_remove_fs(device);
acpi_driver_data(device) = NULL;
if (ec == first_ec)
@ -722,15 +797,13 @@ static int ec_install_handlers(struct acpi_ec *ec)
return -ENODEV;
}
/* EC is fully operational, allow queries */
atomic_set(&ec->query_pending, 0);
return 0;
}
static int acpi_ec_start(struct acpi_device *device)
{
struct acpi_ec *ec;
int ret = 0;
if (!device)
return -EINVAL;
@ -740,14 +813,14 @@ static int acpi_ec_start(struct acpi_device *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;
if (ec != boot_ec)
ret = ec_install_handlers(ec);
return ec_install_handlers(ec);
/* EC is fully operational, allow queries */
atomic_set(&ec->query_pending, 0);
return ret;
}
static int acpi_ec_stop(struct acpi_device *device, int type)
@ -779,34 +852,6 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
return 0;
}
static acpi_status
ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
{
acpi_status status;
struct acpi_ec *ec = context;
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
ec_parse_io_ports, ec);
if (ACPI_FAILURE(status))
return status;
/* 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;
/* 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",
ec->gpe, ec->command_addr, ec->data_addr));
return AE_CTRL_TERMINATE;
}
int __init acpi_ec_ecdt_probe(void)
{
int ret;
@ -825,7 +870,7 @@ int __init acpi_ec_ecdt_probe(void)
if (ACPI_FAILURE(status))
goto error;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT"));
printk(KERN_INFO PREFIX "EC description table is found, configuring boot EC\n");
boot_ec->command_addr = ecdt_ptr->control.address;
boot_ec->data_addr = ecdt_ptr->data.address;