#define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver"
#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_COMMAND_WRITE = 0x81,
- ACPI_EC_BURST_ENABLE = 0x82,
- ACPI_EC_BURST_DISABLE = 0x83,
- ACPI_EC_COMMAND_QUERY = 0x84,
+ ACPI_EC_COMMAND_READ = 0x80,
+ ACPI_EC_COMMAND_WRITE = 0x81,
+ ACPI_EC_BURST_ENABLE = 0x82,
+ ACPI_EC_BURST_DISABLE = 0x83,
+ ACPI_EC_COMMAND_QUERY = 0x84,
};
/* EC events */
enum ec_event {
ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */
- ACPI_EC_EVENT_IBF_0, /* Input buffer empty */
+ ACPI_EC_EVENT_IBF_0, /* Input buffer empty */
};
#define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */
#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
static enum ec_mode {
- EC_INTR = 1, /* Output buffer full */
- EC_POLL, /* Input buffer empty */
+ EC_INTR = 1, /* Output buffer full */
+ EC_POLL, /* Input buffer empty */
} acpi_ec_mode = EC_INTR;
static int acpi_ec_remove(struct acpi_device *device, int type);
} else {
printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
" status = %d, expect_event = %d\n",
- acpi_ec_read_status(ec), event);
+ acpi_ec_read_status(ec), event);
}
}
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);
atomic_set(&ec->leaving_burst, 0);
return 0;
- end:
+ end:
ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode"));
return -1;
}
{
u8 status = 0;
-
status = acpi_ec_read_status(ec);
- if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){
+ if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)) {
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
- if(status)
+ 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:
+ end:
ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode"));
return -1;
}
-#endif /* ACPI_FUTURE_USAGE */
+#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)
+ const u8 * wdata, unsigned wdata_len,
+ u8 * rdata, unsigned rdata_len)
{
int result = 0;
for (; wdata_len > 0; --wdata_len) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (result) {
- printk(KERN_ERR PREFIX "write_cmd timeout, command = %d\n",
- command);
+ printk(KERN_ERR PREFIX
+ "write_cmd timeout, command = %d\n", command);
goto end;
}
acpi_ec_write_data(ec, *(wdata++));
if (!rdata_len) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (result) {
- printk(KERN_ERR PREFIX "finish-write timeout, command = %d\n",
- command);
+ printk(KERN_ERR PREFIX
+ "finish-write timeout, command = %d\n", command);
goto end;
}
} else if (command == ACPI_EC_COMMAND_QUERY) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
if (result) {
printk(KERN_ERR PREFIX "read timeout, command = %d\n",
- command);
+ command);
goto end;
}
}
static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
+ const u8 * wdata, unsigned wdata_len,
+ u8 * rdata, unsigned rdata_len)
{
int status;
u32 glk;
if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
return -EINVAL;
- if (rdata)
- memset(rdata, 0, rdata_len);
+ if (rdata)
+ memset(rdata, 0, rdata_len);
mutex_lock(&ec->lock);
if (ec->global_lock) {
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (status) {
- printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
+ printk(KERN_DEBUG PREFIX
+ "input buffer is not empty, aborting transaction\n");
goto end;
}
- status = acpi_ec_transaction_unlocked(ec, command,
- wdata, wdata_len,
- rdata, rdata_len);
+ status = acpi_ec_transaction_unlocked(ec, command,
+ wdata, wdata_len,
+ rdata, rdata_len);
-end:
+ end:
if (ec->global_lock)
acpi_release_global_lock(glk);
return status;
}
-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;
u8 d;
static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
{
- u8 wdata[2] = { address, data };
- return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,
+ u8 wdata[2] = { address, data };
+ return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,
wdata, 2, NULL, 0);
}
/*
* Externally callable EC access functions. For now, assume 1 EC only
*/
-int ec_read(u8 addr, u8 *val)
+int ec_read(u8 addr, u8 * val)
{
struct acpi_ec *ec;
int err;
EXPORT_SYMBOL(ec_write);
extern 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;
EXPORT_SYMBOL(ec_transaction);
-static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
+static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
{
int result;
- u8 d;
+ u8 d;
- if (!ec || !data)
- return -EINVAL;
+ if (!ec || !data)
+ return -EINVAL;
- /*
- * Query the EC to find out which _Qxx method we need to evaluate.
- * Note that successful completion of the query causes the ACPI_EC_SCI
- * bit to be cleared (and thus clearing the interrupt source).
- */
+ /*
+ * Query the EC to find out which _Qxx method we need to evaluate.
+ * Note that successful completion of the query causes the ACPI_EC_SCI
+ * bit to be cleared (and thus clearing the interrupt source).
+ */
- result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
- if (result)
- return result;
+ result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
+ if (result)
+ return result;
- if (!d)
- return -ENODATA;
+ if (!d)
+ return -ENODATA;
- *data = d;
- return 0;
+ *data = d;
+ return 0;
}
/* --------------------------------------------------------------------------
u8 value;
struct acpi_ec *ec = (struct acpi_ec *)data;
-
if (acpi_ec_mode == EC_INTR) {
wake_up(&ec->wait);
}
value = acpi_ec_read_status(ec);
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);
+ status =
+ acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query,
+ ec);
}
return status == AE_OK ?
acpi_integer f_v = 0;
int i = 0;
-
if ((address > 0xFF) || !value || !handler_context)
return AE_BAD_PARAMETER;
switch (function) {
case ACPI_READ:
temp = 0;
- result = acpi_ec_read(ec, (u8) address, (u8 *) &temp);
+ result = acpi_ec_read(ec, (u8) address, (u8 *) & temp);
break;
case ACPI_WRITE:
result = acpi_ec_write(ec, (u8) address, (u8) temp);
{
struct acpi_ec *ec = (struct acpi_ec *)seq->private;
-
if (!ec)
goto end;
- seq_printf(seq, "gpe: 0x%02x\n",
- (u32) ec->gpe);
+ 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);
+ (u32) ec->command_addr, (u32) ec->data_addr);
seq_printf(seq, "use global lock: %s\n",
ec->global_lock ? "yes" : "no");
acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
{
struct proc_dir_entry *entry = NULL;
-
if (!acpi_device_dir(device)) {
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
acpi_ec_dir);
acpi_status status = AE_OK;
struct acpi_ec *ec = NULL;
-
if (!device)
return -EINVAL;
acpi_driver_data(device) = ec;
/* Use the global lock for all EC transactions? */
- acpi_evaluate_integer(ec->handle, "_GLK", NULL,
- &ec->global_lock);
+ 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 */
/* Get GPE bit assignment (EC events). */
/* TODO: Add support for _GPE returning a package */
- status =
- acpi_evaluate_integer(ec->handle, "_GPE", NULL,
- &ec->gpe);
+ status = acpi_evaluate_integer(ec->handle, "_GPE", NULL, &ec->gpe);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit assignment"));
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Obtaining GPE bit assignment"));
result = -ENODEV;
goto end;
}
goto end;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
- acpi_device_name(device), acpi_device_bid(device),
- (u32) ec->gpe));
+ acpi_device_name(device), acpi_device_bid(device),
+ (u32) ec->gpe));
if (!first_ec)
first_ec = device;
- end:
+ end:
if (result)
kfree(ec);
{
struct acpi_ec *ec = NULL;
-
if (!device)
return -EINVAL;
acpi_status status = AE_OK;
struct acpi_ec *ec = NULL;
-
if (!device)
return -EINVAL;
&acpi_ec_space_handler,
&acpi_ec_space_setup, ec);
if (ACPI_FAILURE(status)) {
- acpi_remove_gpe_handler(NULL, ec->gpe,
- &acpi_ec_gpe_handler);
+ acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
return -ENODEV;
}
acpi_status status = AE_OK;
struct acpi_ec *ec = NULL;
-
if (!device)
return -EINVAL;
if (ACPI_FAILURE(status))
return -ENODEV;
- status =
- acpi_remove_gpe_handler(NULL, ec->gpe,
- &acpi_ec_gpe_handler);
+ status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
if (ACPI_FAILURE(status))
return -ENODEV;
ec_ecdt->uid = -1;
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
- status =
- acpi_evaluate_integer(handle, "_GPE", NULL,
- &ec_ecdt->gpe);
+ 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_ecdt->gpe, ec_ecdt->command_addr,
+ ec_ecdt->data_addr));
return AE_CTRL_TERMINATE;
}
goto error;
}
return 0;
- error:
+ error:
return ret;
}
ec_ecdt->global_lock = TRUE;
ec_ecdt->uid = ecdt_ptr->uid;
- status =
- acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle);
+ status = acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle);
if (ACPI_FAILURE(status)) {
goto error;
}
return 0;
- error:
+ error:
ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
kfree(ec_ecdt);
ec_ecdt = NULL;
{
int result = 0;
-
if (acpi_disabled)
return 0;
acpi_ec_mode = EC_POLL;
}
acpi_ec_driver.ops.add = acpi_ec_add;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n", intr ? "interrupt" : "polling"));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n",
+ intr ? "interrupt" : "polling"));
return 1;
}
projects / linux-2.6 / commitdiff