/*
- * 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) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
};
/* 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 {
acpi_handle handle;
- unsigned long uid;
unsigned long gpe;
unsigned long command_addr;
unsigned long data_addr;
atomic_t query_pending;
atomic_t event_count;
wait_queue_head_t wait;
-} *boot_ec;
-
-/* External interfaces use first EC only, so remember */
-static struct acpi_device *first_ec;
+} *boot_ec, *first_ec;
/* --------------------------------------------------------------------------
Transaction Management
*/
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);
+ return acpi_ec_burst_enable(first_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);
+ return acpi_ec_burst_disable(first_ec);
}
EXPORT_SYMBOL(ec_burst_disable);
int ec_read(u8 addr, u8 * val)
{
- struct acpi_ec *ec;
int err;
u8 temp_data;
if (!first_ec)
return -ENODEV;
- ec = acpi_driver_data(first_ec);
-
- err = acpi_ec_read(ec, addr, &temp_data);
+ err = acpi_ec_read(first_ec, addr, &temp_data);
if (!err) {
*val = temp_data;
int ec_write(u8 addr, u8 val)
{
- struct acpi_ec *ec;
int err;
if (!first_ec)
return -ENODEV;
- ec = acpi_driver_data(first_ec);
-
- err = acpi_ec_write(ec, addr, val);
+ err = acpi_ec_write(first_ec, addr, val);
return err;
}
const u8 * wdata, unsigned wdata_len,
u8 * rdata, unsigned rdata_len)
{
- struct acpi_ec *ec;
-
if (!first_ec)
return -ENODEV;
- ec = acpi_driver_data(first_ec);
-
- return acpi_ec_transaction(ec, command, wdata,
+ return acpi_ec_transaction(first_ec, command, wdata,
wdata_len, rdata, rdata_len);
}
if (!ec)
goto end;
- seq_printf(seq, "gpe: 0x%02x\n", (u32) ec->gpe);
- seq_printf(seq, "ports: 0x%02x, 0x%02x\n",
- (u32) ec->command_addr, (u32) ec->data_addr);
- seq_printf(seq, "use global lock: %s\n",
+ seq_printf(seq, "gpe:\t\t\t0x%02x\n", (u32) ec->gpe);
+ seq_printf(seq, "ports:\t\t\t0x%02x, 0x%02x\n",
+ (unsigned)ec->command_addr, (unsigned)ec->data_addr);
+ seq_printf(seq, "use global lock:\t%s\n",
ec->global_lock ? "yes" : "no");
- acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
-
end:
return 0;
}
if (!ec)
return NULL;
- atomic_set(&ec->query_pending, 0);
+ atomic_set(&ec->query_pending, 1);
atomic_set(&ec->event_count, 1);
mutex_init(&ec->lock);
init_waitqueue_head(&ec->wait);
kfree(ec);
ec = boot_ec;
}
- }
+ } else
+ first_ec = ec;
ec->handle = device->handle;
acpi_driver_data(device) = ec;
- if (!first_ec)
- first_ec = device;
acpi_ec_add_fs(device);
static int acpi_ec_remove(struct acpi_device *device, int type)
{
- struct acpi_ec *ec = NULL;
+ struct acpi_ec *ec;
if (!device)
return -EINVAL;
ec = acpi_driver_data(device);
-
acpi_ec_remove_fs(device);
-
acpi_driver_data(device) = NULL;
- if (device == first_ec)
+ if (ec == first_ec)
first_ec = NULL;
/* Don't touch boot EC */
if (boot_ec != ec)
kfree(ec);
-
return 0;
}
{
struct acpi_ec *ec = context;
- if (resource->type != ACPI_RESOURCE_TYPE_IO) {
+ if (resource->type != ACPI_RESOURCE_TYPE_IO)
return AE_OK;
- }
/*
* The first address region returned is the data port, and
* the second address region returned is the status/command
* port.
*/
- if (ec->data_addr == 0) {
+ if (ec->data_addr == 0)
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;
- } else {
+ else
return AE_CTRL_TERMINATE;
- }
return AE_OK;
}
&acpi_ec_gpe_handler, ec);
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);
return -ENODEV;
}
+ /* EC is fully operational, allow queries */
+ atomic_set(&ec->query_pending, 0);
+
return 0;
}
boot_ec->command_addr = ecdt_ptr->control.address;
boot_ec->data_addr = ecdt_ptr->data.address;
boot_ec->gpe = ecdt_ptr->gpe;
- boot_ec->uid = ecdt_ptr->uid;
boot_ec->handle = ACPI_ROOT_OBJECT;
ret = ec_install_handlers(boot_ec);
- if (!ret)
+ if (!ret) {
+ first_ec = boot_ec;
return 0;
+ }
error:
kfree(boot_ec);
boot_ec = NULL;