/*
- * 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>
#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,
ACPI_EC_BURST_DISABLE = 0x83,
ACPI_EC_COMMAND_QUERY = 0x84,
};
+
/* EC events */
enum ec_event {
ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */
static int acpi_ec_stop(struct acpi_device *device, int type);
static int acpi_ec_add(struct acpi_device *device);
+static const struct acpi_device_id ec_device_ids[] = {
+ {"PNP0C09", 0},
+ {"", 0},
+};
+
static struct acpi_driver acpi_ec_driver = {
.name = "ec",
.class = ACPI_EC_CLASS,
- .ids = ACPI_EC_HID,
+ .ids = ec_device_ids,
.ops = {
.add = acpi_ec_add,
.remove = acpi_ec_remove,
};
/* 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 uid;
unsigned long gpe;
unsigned long command_addr;
unsigned long data_addr;
struct mutex lock;
atomic_t query_pending;
atomic_t event_count;
- atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */
wait_queue_head_t wait;
-} *ec_ecdt;
-
-/* External interfaces use first EC only, so remember */
-static struct acpi_device *first_ec;
+ struct list_head list;
+} *boot_ec, *first_ec;
/* --------------------------------------------------------------------------
Transaction Management
return 0;
}
-static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, unsigned count)
+static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event,
+ unsigned count, int force_poll)
{
- if (acpi_ec_mode == EC_POLL) {
+ if (unlikely(force_poll) || 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, 0))
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)
+ u8 * rdata, unsigned rdata_len,
+ int force_poll)
{
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, count);
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll);
if (result) {
printk(KERN_ERR PREFIX
"write_cmd timeout, command = %d\n", command);
}
if (!rdata_len) {
- result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count);
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll);
if (result) {
printk(KERN_ERR PREFIX
"finish-write timeout, command = %d\n", command);
}
for (; rdata_len > 0; --rdata_len) {
- result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count);
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count, force_poll);
if (result) {
printk(KERN_ERR PREFIX "read timeout, command = %d\n",
command);
static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
const u8 * wdata, unsigned wdata_len,
- u8 * rdata, unsigned rdata_len)
+ u8 * rdata, unsigned rdata_len,
+ int force_poll)
{
int status;
u32 glk;
/* 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, 0);
+ 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;
}
status = acpi_ec_transaction_unlocked(ec, command,
wdata, wdata_len,
- rdata, rdata_len);
+ rdata, rdata_len,
+ force_poll);
end:
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, 0);
+}
+
+int acpi_ec_burst_disable(struct acpi_ec *ec)
+{
+ return acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE, NULL, 0, NULL, 0, 0);
+}
+
static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
{
int result;
u8 d;
result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
- &address, 1, &d, 1);
+ &address, 1, &d, 1, 0);
*data = d;
return result;
}
{
u8 wdata[2] = { address, data };
return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,
- wdata, 2, NULL, 0);
+ wdata, 2, NULL, 0, 0);
}
/*
* 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)
{
- 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;
}
int ec_transaction(u8 command,
const u8 * wdata, unsigned wdata_len,
- u8 * rdata, unsigned rdata_len)
+ u8 * rdata, unsigned rdata_len,
+ int force_poll)
{
- struct acpi_ec *ec;
-
if (!first_ec)
return -ENODEV;
- ec = acpi_driver_data(first_ec);
-
- return acpi_ec_transaction(ec, command, wdata,
- wdata_len, rdata, rdata_len);
+ return acpi_ec_transaction(first_ec, command, wdata,
+ wdata_len, rdata, rdata_len,
+ force_poll);
}
EXPORT_SYMBOL(ec_transaction);
* bit to be cleared (and thus clearing the interrupt source).
*/
- result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
+ result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1, 0);
if (result)
return result;
/* --------------------------------------------------------------------------
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 = (struct acpi_ec *)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(©, 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)
{
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);
}
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 ?
}
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 = NULL;
- u64 temp = *value;
- acpi_integer f_v = 0;
- int i = 0;
+ struct acpi_ec *ec = handler_context;
+ 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;
- }
-
- ec = (struct acpi_ec *)handler_context;
-
- 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 (bits != 8 && acpi_strict)
+ return AE_BAD_PARAMETER;
- if (function == ACPI_READ) {
- f_v |= temp << 8 * i;
- *value = f_v;
+ 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;
}
- out:
switch (result) {
case -EINVAL:
return AE_BAD_PARAMETER;
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;
- 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;
}
/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
+static acpi_status
+ec_parse_io_ports(struct acpi_resource *resource, void *context);
-static int acpi_ec_add(struct acpi_device *device)
+static struct acpi_ec *make_acpi_ec(void)
{
- 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);
+ struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
if (!ec)
- return -ENOMEM;
+ return NULL;
- ec->handle = device->handle;
- ec->uid = -1;
- mutex_init(&ec->lock);
- atomic_set(&ec->query_pending, 0);
+ atomic_set(&ec->query_pending, 1);
atomic_set(&ec->event_count, 1);
- if (acpi_ec_mode == EC_INTR) {
- atomic_set(&ec->leaving_burst, 1);
- init_waitqueue_head(&ec->wait);
+ 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);
}
- strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
- strcpy(acpi_device_class(device), ACPI_EC_CLASS);
- acpi_driver_data(device) = ec;
+ 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(ec->handle, "_GLK", NULL, &ec->global_lock);
+ acpi_evaluate_integer(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);
+ /* Find and register all query methods */
+ acpi_walk_namespace(ACPI_TYPE_METHOD, handle, 1,
+ acpi_ec_register_query_methods, ec, NULL);
- acpi_remove_gpe_handler(NULL, ec_ecdt->gpe,
- &acpi_ec_gpe_handler);
+ ec->handle = handle;
- kfree(ec_ecdt);
- }
+ printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx",
+ ec->gpe, ec->command_addr, ec->data_addr);
- /* 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;
- }
+ return 0;
+}
- result = acpi_ec_add_fs(device);
- if (result)
- goto end;
+static int acpi_ec_add(struct acpi_device *device)
+{
+ struct acpi_ec *ec = NULL;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
- acpi_device_name(device), acpi_device_bid(device),
- (u32) ec->gpe));
+ if (!device)
+ return -EINVAL;
- if (!first_ec)
- first_ec = device;
+ strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
+ strcpy(acpi_device_class(device), ACPI_EC_CLASS);
- end:
- if (result)
+ ec = make_acpi_ec();
+ if (!ec)
+ return -ENOMEM;
+
+ if (ec_parse_device(ec, device->handle)) {
kfree(ec);
+ return -EINVAL;
+ }
- return result;
+ /* 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;
+ /* 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;
+ }
+ } else
+ first_ec = ec;
+ ec->handle = device->handle;
+ acpi_driver_data(device) = ec;
+
+ acpi_ec_add_fs(device);
+ return 0;
}
static int acpi_ec_remove(struct acpi_device *device, int type)
{
- struct acpi_ec *ec = NULL;
+ 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)
+ first_ec = NULL;
- kfree(ec);
-
+ /* Don't touch boot EC */
+ if (boot_ec != 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) {
+ 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;
}
-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);
return -ENODEV;
}
- return AE_OK;
+ 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 = NULL;
+ struct acpi_ec *ec;
+ int ret = 0;
if (!device)
return -EINVAL;
ec = acpi_driver_data(device);
- status = acpi_remove_address_space_handler(ec->handle,
- ACPI_ADR_SPACE_EC,
- &acpi_ec_space_handler);
- if (ACPI_FAILURE(status))
- return -ENODEV;
-
- status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
- if (ACPI_FAILURE(status))
- return -ENODEV;
-
- return 0;
-}
-
-static acpi_status __init
-acpi_fake_ecdt_callback(acpi_handle handle,
- u32 Level, void *context, void **retval)
-{
- acpi_status status;
-
- mutex_init(&ec_ecdt->lock);
- 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,
- acpi_ec_io_ports, ec_ecdt);
- if (ACPI_FAILURE(status))
- return status;
+ if (!ec)
+ return -EINVAL;
- ec_ecdt->uid = -1;
- acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
+ /* Boot EC is already working */
+ if (ec != boot_ec)
+ ret = ec_install_handlers(ec);
- status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->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));
+ /* EC is fully operational, allow queries */
+ atomic_set(&ec->query_pending, 0);
- return AE_CTRL_TERMINATE;
+ return ret;
}
-/*
- * 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)
+static int acpi_ec_stop(struct acpi_device *device, int type)
{
acpi_status status;
- int ret = 0;
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
+ struct acpi_ec *ec;
- ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
- if (!ec_ecdt) {
- ret = -ENOMEM;
- goto error;
- }
+ if (!device)
+ return -EINVAL;
- 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;
-}
+ ec = acpi_driver_data(device);
+ if (!ec)
+ return -EINVAL;
-static int __init acpi_ec_get_real_ecdt(void)
-{
- acpi_status status;
- struct acpi_table_ecdt *ecdt_ptr;
+ /* Don't touch boot EC */
+ if (ec == boot_ec)
+ return 0;
- status = acpi_get_table(ACPI_SIG_ECDT, 1,
- (struct acpi_table_header **)&ecdt_ptr);
+ status = acpi_remove_address_space_handler(ec->handle,
+ ACPI_ADR_SPACE_EC,
+ &acpi_ec_space_handler);
if (ACPI_FAILURE(status))
return -ENODEV;
- 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);
- atomic_set(&ec_ecdt->event_count, 1);
- 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;
-
- status = acpi_get_handle(NULL, ecdt_ptr->id, &ec_ecdt->handle);
- if (ACPI_FAILURE(status)) {
- goto error;
- }
+ status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
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;
+ acpi_status status;
+ struct acpi_table_ecdt *ecdt_ptr;
- 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;
-
+ boot_ec = make_acpi_ec();
+ if (!boot_ec)
+ return -ENOMEM;
/*
- * Install GPE handler
+ * Generate a boot ec context
*/
- 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);
+ status = acpi_get_table(ACPI_SIG_ECDT, 1,
+ (struct acpi_table_header **)&ecdt_ptr);
+ if (ACPI_FAILURE(status))
goto error;
- }
- return 0;
+ 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;
+ boot_ec->gpe = ecdt_ptr->gpe;
+ boot_ec->handle = ACPI_ROOT_OBJECT;
+ ret = ec_install_handlers(boot_ec);
+ if (!ret) {
+ first_ec = boot_ec;
+ return 0;
+ }
error:
- ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
- kfree(ec_ecdt);
- ec_ecdt = NULL;
+ kfree(boot_ec);
+ boot_ec = NULL;
return -ENODEV;
}
}
#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;
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;
+ acpi_ec_mode = (intr) ? EC_INTR : EC_POLL;
+
printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling");
return 1;
git.samba.org / sfrench / cifs-2.6.git / blobdiff