#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/interrupt.h>
#include <asm/io.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#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 */
#define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */
#define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */
-#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */
-#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */
+#define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */
#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
+#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */
+#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */
+
#define ACPI_EC_COMMAND_READ 0x80
#define ACPI_EC_COMMAND_WRITE 0x81
+#define ACPI_EC_BURST_ENABLE 0x82
+#define ACPI_EC_BURST_DISABLE 0x83
#define ACPI_EC_COMMAND_QUERY 0x84
-static int acpi_ec_add (struct acpi_device *device);
+#define EC_POLLING 0xFF
+#define EC_BURST 0x00
+
+
static int acpi_ec_remove (struct acpi_device *device, int type);
static int acpi_ec_start (struct acpi_device *device);
static int acpi_ec_stop (struct acpi_device *device, int type);
+static int acpi_ec_burst_add ( struct acpi_device *device);
+static int acpi_ec_polling_add ( struct acpi_device *device);
static struct acpi_driver acpi_ec_driver = {
.name = ACPI_EC_DRIVER_NAME,
.class = ACPI_EC_CLASS,
.ids = ACPI_EC_HID,
.ops = {
- .add = acpi_ec_add,
+ .add = acpi_ec_polling_add,
.remove = acpi_ec_remove,
.start = acpi_ec_start,
.stop = acpi_ec_stop,
},
};
-
-struct acpi_ec {
- acpi_handle handle;
- unsigned long uid;
- unsigned long gpe_bit;
- struct acpi_generic_address status_addr;
- struct acpi_generic_address command_addr;
- struct acpi_generic_address data_addr;
- unsigned long global_lock;
- spinlock_t lock;
+union acpi_ec {
+ struct {
+ u32 mode;
+ acpi_handle handle;
+ unsigned long uid;
+ unsigned long gpe_bit;
+ struct acpi_generic_address status_addr;
+ struct acpi_generic_address command_addr;
+ struct acpi_generic_address data_addr;
+ unsigned long global_lock;
+ } common;
+
+ struct {
+ u32 mode;
+ acpi_handle handle;
+ unsigned long uid;
+ unsigned long gpe_bit;
+ struct acpi_generic_address status_addr;
+ struct acpi_generic_address command_addr;
+ struct acpi_generic_address data_addr;
+ unsigned long global_lock;
+ unsigned int expect_event;
+ atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort*/
+ atomic_t pending_gpe;
+ struct semaphore sem;
+ wait_queue_head_t wait;
+ }burst;
+
+ struct {
+ u32 mode;
+ acpi_handle handle;
+ unsigned long uid;
+ unsigned long gpe_bit;
+ struct acpi_generic_address status_addr;
+ struct acpi_generic_address command_addr;
+ struct acpi_generic_address data_addr;
+ unsigned long global_lock;
+ spinlock_t lock;
+ }polling;
};
+static int acpi_ec_polling_wait ( union acpi_ec *ec, u8 event);
+static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event);
+static int acpi_ec_polling_read ( union acpi_ec *ec, u8 address, u32 *data);
+static int acpi_ec_burst_read( union acpi_ec *ec, u8 address, u32 *data);
+static int acpi_ec_polling_write ( union acpi_ec *ec, u8 address, u8 data);
+static int acpi_ec_burst_write ( union acpi_ec *ec, u8 address, u8 data);
+static int acpi_ec_polling_query ( union acpi_ec *ec, u32 *data);
+static int acpi_ec_burst_query ( union acpi_ec *ec, u32 *data);
+static void acpi_ec_gpe_polling_query ( void *ec_cxt);
+static void acpi_ec_gpe_burst_query ( void *ec_cxt);
+static u32 acpi_ec_gpe_polling_handler ( void *data);
+static u32 acpi_ec_gpe_burst_handler ( void *data);
+static acpi_status __init
+acpi_fake_ecdt_polling_callback (
+ acpi_handle handle,
+ u32 Level,
+ void *context,
+ void **retval);
+
+static acpi_status __init
+acpi_fake_ecdt_burst_callback (
+ acpi_handle handle,
+ u32 Level,
+ void *context,
+ void **retval);
+
+static int __init
+acpi_ec_polling_get_real_ecdt(void);
+static int __init
+acpi_ec_burst_get_real_ecdt(void);
/* If we find an EC via the ECDT, we need to keep a ptr to its context */
-static struct acpi_ec *ec_ecdt;
+static union acpi_ec *ec_ecdt;
/* External interfaces use first EC only, so remember */
static struct acpi_device *first_ec;
+static int acpi_ec_polling_mode = EC_POLLING;
/* --------------------------------------------------------------------------
Transaction Management
-------------------------------------------------------------------------- */
+static inline u32 acpi_ec_read_status(union acpi_ec *ec)
+{
+ u32 status = 0;
+
+ acpi_hw_low_level_read(8, &status, &ec->common.status_addr);
+ return status;
+}
+
static int
acpi_ec_wait (
- struct acpi_ec *ec,
+ union acpi_ec *ec,
+ u8 event)
+{
+ if (acpi_ec_polling_mode)
+ return acpi_ec_polling_wait (ec, event);
+ else
+ return acpi_ec_burst_wait (ec, event);
+}
+
+static int
+acpi_ec_polling_wait (
+ union acpi_ec *ec,
u8 event)
{
u32 acpi_ec_status = 0;
switch (event) {
case ACPI_EC_EVENT_OBF:
do {
- acpi_hw_low_level_read(8, &acpi_ec_status, &ec->status_addr);
+ acpi_hw_low_level_read(8, &acpi_ec_status, &ec->common.status_addr);
if (acpi_ec_status & ACPI_EC_FLAG_OBF)
return 0;
udelay(ACPI_EC_UDELAY);
break;
case ACPI_EC_EVENT_IBE:
do {
- acpi_hw_low_level_read(8, &acpi_ec_status, &ec->status_addr);
+ acpi_hw_low_level_read(8, &acpi_ec_status, &ec->common.status_addr);
if (!(acpi_ec_status & ACPI_EC_FLAG_IBF))
return 0;
udelay(ACPI_EC_UDELAY);
return -ETIME;
}
+static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_wait");
+
+ ec->burst.expect_event = event;
+ smp_mb();
+
+ result = wait_event_interruptible_timeout(ec->burst.wait,
+ !ec->burst.expect_event,
+ msecs_to_jiffies(ACPI_EC_DELAY));
+
+ ec->burst.expect_event = 0;
+ smp_mb();
+
+ if (result < 0){
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR," result = %d ", result));
+ return_VALUE(result);
+ }
+
+ /*
+ * Verify that the event in question has actually happened by
+ * querying EC status. Do the check even if operation timed-out
+ * to make sure that we did not miss interrupt.
+ */
+ switch (event) {
+ case ACPI_EC_EVENT_OBF:
+ if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF)
+ return_VALUE(0);
+ break;
+
+ case ACPI_EC_EVENT_IBE:
+ if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
+ return_VALUE(0);
+ break;
+ }
+
+ return_VALUE(-ETIME);
+}
+
+
+
+static int
+acpi_ec_enter_burst_mode (
+ union acpi_ec *ec)
+{
+ u32 tmp = 0;
+ int status = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode");
+
+ status = acpi_ec_read_status(ec);
+ if (status != -EINVAL &&
+ !(status & ACPI_EC_FLAG_BURST)){
+ acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, &ec->common.command_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
+ if (status){
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ return_VALUE(-EINVAL);
+ }
+ acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr);
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ if(tmp != 0x90 ) {/* Burst ACK byte*/
+ return_VALUE(-EINVAL);
+ }
+ }
+
+ atomic_set(&ec->burst.leaving_burst , 0);
+ return_VALUE(0);
+}
+static int
+acpi_ec_leave_burst_mode (
+ union acpi_ec *ec)
+{
+ int status =0;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode");
+
+ atomic_set(&ec->burst.leaving_burst , 1);
+ status = acpi_ec_read_status(ec);
+ if (status != -EINVAL &&
+ (status & ACPI_EC_FLAG_BURST)){
+ acpi_hw_low_level_write(8, ACPI_EC_BURST_DISABLE, &ec->common.command_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
+ if (status){
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"------->wait fail\n"));
+ return_VALUE(-EINVAL);
+ }
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ status = acpi_ec_read_status(ec);
+ }
+
+ return_VALUE(0);
+}
static int
acpi_ec_read (
- struct acpi_ec *ec,
+ union acpi_ec *ec,
+ u8 address,
+ u32 *data)
+{
+ if (acpi_ec_polling_mode)
+ return acpi_ec_polling_read(ec, address, data);
+ else
+ return acpi_ec_burst_read(ec, address, data);
+}
+static int
+acpi_ec_write (
+ union acpi_ec *ec,
+ u8 address,
+ u8 data)
+{
+ if (acpi_ec_polling_mode)
+ return acpi_ec_polling_write(ec, address, data);
+ else
+ return acpi_ec_burst_write(ec, address, data);
+}
+static int
+acpi_ec_polling_read (
+ union acpi_ec *ec,
u8 address,
u32 *data)
{
*data = 0;
- if (ec->global_lock) {
+ if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
}
-
- spin_lock_irqsave(&ec->lock, flags);
- acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->command_addr);
+ spin_lock_irqsave(&ec->polling.lock, flags);
+
+ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (result)
goto end;
- acpi_hw_low_level_write(8, address, &ec->data_addr);
+ acpi_hw_low_level_write(8, address, &ec->common.data_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
if (result)
goto end;
-
- acpi_hw_low_level_read(8, data, &ec->data_addr);
+ acpi_hw_low_level_read(8, data, &ec->common.data_addr);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
*data, address));
-
+
end:
- spin_unlock_irqrestore(&ec->lock, flags);
+ spin_unlock_irqrestore(&ec->polling.lock, flags);
- if (ec->global_lock)
+ if (ec->common.global_lock)
acpi_release_global_lock(glk);
return_VALUE(result);
static int
-acpi_ec_write (
- struct acpi_ec *ec,
+acpi_ec_polling_write (
+ union acpi_ec *ec,
u8 address,
u8 data)
{
if (!ec)
return_VALUE(-EINVAL);
- if (ec->global_lock) {
+ if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
}
- spin_lock_irqsave(&ec->lock, flags);
+ spin_lock_irqsave(&ec->polling.lock, flags);
- acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->command_addr);
+ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (result)
goto end;
- acpi_hw_low_level_write(8, address, &ec->data_addr);
+ acpi_hw_low_level_write(8, address, &ec->common.data_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (result)
goto end;
- acpi_hw_low_level_write(8, data, &ec->data_addr);
+ acpi_hw_low_level_write(8, data, &ec->common.data_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (result)
goto end;
data, address));
end:
- spin_unlock_irqrestore(&ec->lock, flags);
+ spin_unlock_irqrestore(&ec->polling.lock, flags);
- if (ec->global_lock)
+ if (ec->common.global_lock)
acpi_release_global_lock(glk);
return_VALUE(result);
}
+static int
+acpi_ec_burst_read (
+ union acpi_ec *ec,
+ u8 address,
+ u32 *data)
+{
+ int status = 0;
+ u32 glk;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_read");
+
+ if (!ec || !data)
+ return_VALUE(-EINVAL);
+
+retry:
+ *data = 0;
+
+ if (ec->common.global_lock) {
+ status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+ }
+
+ WARN_ON(in_interrupt());
+ down(&ec->burst.sem);
+
+ if(acpi_ec_enter_burst_mode(ec))
+ goto end;
+
+ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->common.command_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ if (status) {
+ goto end;
+ }
+
+ acpi_hw_low_level_write(8, address, &ec->common.data_addr);
+ status= acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
+ if (status){
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ goto end;
+ }
+
+ acpi_hw_low_level_read(8, data, &ec->common.data_addr);
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
+ *data, address));
+
+end:
+ acpi_ec_leave_burst_mode(ec);
+ up(&ec->burst.sem);
+
+ if (ec->common.global_lock)
+ acpi_release_global_lock(glk);
+
+ if(atomic_read(&ec->burst.leaving_burst) == 2){
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,"aborted, retry ...\n"));
+ while(atomic_read(&ec->burst.pending_gpe)){
+ msleep(1);
+ }
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ goto retry;
+ }
+
+ return_VALUE(status);
+}
+
+
+static int
+acpi_ec_burst_write (
+ union acpi_ec *ec,
+ u8 address,
+ u8 data)
+{
+ int status = 0;
+ u32 glk;
+ u32 tmp;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_write");
+
+ if (!ec)
+ return_VALUE(-EINVAL);
+retry:
+ if (ec->common.global_lock) {
+ status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+ }
+
+ WARN_ON(in_interrupt());
+ down(&ec->burst.sem);
+
+ if(acpi_ec_enter_burst_mode(ec))
+ goto end;
+
+ status = acpi_ec_read_status(ec);
+ if (status != -EINVAL &&
+ !(status & ACPI_EC_FLAG_BURST)){
+ acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, &ec->common.command_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
+ if (status)
+ goto end;
+ acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr);
+ if(tmp != 0x90 ) /* Burst ACK byte*/
+ goto end;
+ }
+ /*Now we are in burst mode*/
+
+ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->common.command_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ if (status){
+ goto end;
+ }
+
+ acpi_hw_low_level_write(8, address, &ec->common.data_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (status){
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ goto end;
+ }
+
+ acpi_hw_low_level_write(8, data, &ec->common.data_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ if (status)
+ goto end;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
+ data, address));
+
+end:
+ acpi_ec_leave_burst_mode(ec);
+ up(&ec->burst.sem);
+
+ if (ec->common.global_lock)
+ acpi_release_global_lock(glk);
+
+ if(atomic_read(&ec->burst.leaving_burst) == 2){
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,"aborted, retry ...\n"));
+ while(atomic_read(&ec->burst.pending_gpe)){
+ msleep(1);
+ }
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ goto retry;
+ }
+
+ return_VALUE(status);
+}
+
/*
* Externally callable EC access functions. For now, assume 1 EC only
*/
int
ec_read(u8 addr, u8 *val)
{
- struct acpi_ec *ec;
+ union acpi_ec *ec;
int err;
u32 temp_data;
int
ec_write(u8 addr, u8 val)
{
- struct acpi_ec *ec;
+ union acpi_ec *ec;
int err;
if (!first_ec)
}
EXPORT_SYMBOL(ec_write);
-
static int
acpi_ec_query (
- struct acpi_ec *ec,
+ union acpi_ec *ec,
+ u32 *data)
+{
+ if (acpi_ec_polling_mode)
+ return acpi_ec_polling_query(ec, data);
+ else
+ return acpi_ec_burst_query(ec, data);
+}
+static int
+acpi_ec_polling_query (
+ union acpi_ec *ec,
u32 *data)
{
int result = 0;
*data = 0;
- if (ec->global_lock) {
+ if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
* Note that successful completion of the query causes the ACPI_EC_SCI
* bit to be cleared (and thus clearing the interrupt source).
*/
- spin_lock_irqsave(&ec->lock, flags);
+ spin_lock_irqsave(&ec->polling.lock, flags);
- acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->command_addr);
+ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
if (result)
goto end;
-
- acpi_hw_low_level_read(8, data, &ec->data_addr);
+
+ acpi_hw_low_level_read(8, data, &ec->common.data_addr);
if (!*data)
result = -ENODATA;
end:
- spin_unlock_irqrestore(&ec->lock, flags);
+ spin_unlock_irqrestore(&ec->polling.lock, flags);
- if (ec->global_lock)
+ if (ec->common.global_lock)
acpi_release_global_lock(glk);
return_VALUE(result);
}
+static int
+acpi_ec_burst_query (
+ union acpi_ec *ec,
+ u32 *data)
+{
+ int status = 0;
+ u32 glk;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_query");
+
+ if (!ec || !data)
+ return_VALUE(-EINVAL);
+ *data = 0;
+
+ if (ec->common.global_lock) {
+ status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+ }
+
+ down(&ec->burst.sem);
+ if(acpi_ec_enter_burst_mode(ec))
+ goto end;
+ /*
+ * 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).
+ */
+ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->common.command_addr);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
+ if (status){
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ goto end;
+ }
+
+ acpi_hw_low_level_read(8, data, &ec->common.data_addr);
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ if (!*data)
+ status = -ENODATA;
+
+end:
+ acpi_ec_leave_burst_mode(ec);
+ up(&ec->burst.sem);
+
+ if (ec->common.global_lock)
+ acpi_release_global_lock(glk);
+
+ if(atomic_read(&ec->burst.leaving_burst) == 2){
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,"aborted, retry ...\n"));
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+ status = -ENODATA;
+ }
+ return_VALUE(status);
+}
/* --------------------------------------------------------------------------
Event Management
-------------------------------------------------------------------------- */
-struct acpi_ec_query_data {
+union acpi_ec_query_data {
acpi_handle handle;
u8 data;
};
acpi_ec_gpe_query (
void *ec_cxt)
{
- struct acpi_ec *ec = (struct acpi_ec *) ec_cxt;
+ if (acpi_ec_polling_mode)
+ acpi_ec_gpe_polling_query(ec_cxt);
+ else
+ acpi_ec_gpe_burst_query(ec_cxt);
+}
+
+static void
+acpi_ec_gpe_polling_query (
+ void *ec_cxt)
+{
+ union acpi_ec *ec = (union acpi_ec *) ec_cxt;
u32 value = 0;
unsigned long flags = 0;
static char object_name[5] = {'_','Q','0','0','\0'};
ACPI_FUNCTION_TRACE("acpi_ec_gpe_query");
if (!ec_cxt)
- goto end;
+ goto end;
- spin_lock_irqsave(&ec->lock, flags);
- acpi_hw_low_level_read(8, &value, &ec->command_addr);
- spin_unlock_irqrestore(&ec->lock, flags);
+ spin_lock_irqsave(&ec->polling.lock, flags);
+ acpi_hw_low_level_read(8, &value, &ec->common.command_addr);
+ spin_unlock_irqrestore(&ec->polling.lock, flags);
/* TBD: Implement asynch events!
* NOTE: All we care about are EC-SCI's. Other EC events are
if (acpi_ec_query(ec, &value))
goto end;
-
+
object_name[2] = hex[((value >> 4) & 0x0F)];
object_name[3] = hex[(value & 0x0F)];
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
- acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
+ acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
-end:
- acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
+end:
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+}
+static void
+acpi_ec_gpe_burst_query (
+ void *ec_cxt)
+{
+ union acpi_ec *ec = (union acpi_ec *) ec_cxt;
+ u32 value;
+ int result = -ENODATA;
+ static char object_name[5] = {'_','Q','0','0','\0'};
+ const char hex[] = {'0','1','2','3','4','5','6','7',
+ '8','9','A','B','C','D','E','F'};
+
+ ACPI_FUNCTION_TRACE("acpi_ec_gpe_query");
+
+ if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI)
+ result = acpi_ec_query(ec, &value);
+
+ if (result)
+ goto end;
+
+ object_name[2] = hex[((value >> 4) & 0x0F)];
+ object_name[3] = hex[(value & 0x0F)];
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
+
+ acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
+end:
+ atomic_dec(&ec->burst.pending_gpe);
+ return;
}
static u32
acpi_ec_gpe_handler (
void *data)
+{
+ if (acpi_ec_polling_mode)
+ return acpi_ec_gpe_polling_handler(data);
+ else
+ return acpi_ec_gpe_burst_handler(data);
+}
+static u32
+acpi_ec_gpe_polling_handler (
+ void *data)
{
acpi_status status = AE_OK;
- struct acpi_ec *ec = (struct acpi_ec *) data;
+ union acpi_ec *ec = (union acpi_ec *) data;
if (!ec)
return ACPI_INTERRUPT_NOT_HANDLED;
- acpi_disable_gpe(NULL, ec->gpe_bit, ACPI_ISR);
+ acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
acpi_ec_gpe_query, ec);
else
return ACPI_INTERRUPT_NOT_HANDLED;
}
+static u32
+acpi_ec_gpe_burst_handler (
+ void *data)
+{
+ acpi_status status = AE_OK;
+ u32 value;
+ union acpi_ec *ec = (union acpi_ec *) data;
+
+ if (!ec)
+ return ACPI_INTERRUPT_NOT_HANDLED;
+
+ acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
+
+ value = acpi_ec_read_status(ec);
+
+ if((value & ACPI_EC_FLAG_IBF) &&
+ !(value & ACPI_EC_FLAG_BURST) &&
+ (atomic_read(&ec->burst.leaving_burst) == 0)) {
+ /*
+ * the embedded controller disables
+ * burst mode for any reason other
+ * than the burst disable command
+ * to process critical event.
+ */
+ atomic_set(&ec->burst.leaving_burst , 2); /* block current pending transaction
+ and retry */
+ wake_up(&ec->burst.wait);
+ }else {
+ if ((ec->burst.expect_event == ACPI_EC_EVENT_OBF &&
+ (value & ACPI_EC_FLAG_OBF)) ||
+ (ec->burst.expect_event == ACPI_EC_EVENT_IBE &&
+ !(value & ACPI_EC_FLAG_IBF))) {
+ ec->burst.expect_event = 0;
+ wake_up(&ec->burst.wait);
+ return ACPI_INTERRUPT_HANDLED;
+ }
+ }
+
+ if (value & ACPI_EC_FLAG_SCI){
+ atomic_add(1, &ec->burst.pending_gpe) ;
+ status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
+ acpi_ec_gpe_query, ec);
+ return status == AE_OK ?
+ ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
+ }
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
+ return status == AE_OK ?
+ ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
+}
/* --------------------------------------------------------------------------
Address Space Management
* The EC object is in the handler context and is needed
* when calling the acpi_ec_space_handler.
*/
- if(function == ACPI_REGION_DEACTIVATE)
- *return_context = NULL;
- else
- *return_context = handler_context;
+ *return_context = (function != ACPI_REGION_DEACTIVATE) ?
+ handler_context : NULL;
return AE_OK;
}
void *region_context)
{
int result = 0;
- struct acpi_ec *ec = NULL;
- u32 temp = 0;
+ union acpi_ec *ec = NULL;
+ u64 temp = *value;
acpi_integer f_v = 0;
int i = 0;
if ((address > 0xFF) || !value || !handler_context)
return_VALUE(AE_BAD_PARAMETER);
- if(bit_width != 8) {
+ if (bit_width != 8 && acpi_strict) {
printk(KERN_WARNING PREFIX "acpi_ec_space_handler: bit_width should be 8\n");
- if (acpi_strict)
- return_VALUE(AE_BAD_PARAMETER);
+ return_VALUE(AE_BAD_PARAMETER);
}
- ec = (struct acpi_ec *) handler_context;
+ ec = (union acpi_ec *) handler_context;
next_byte:
switch (function) {
case ACPI_READ:
- result = acpi_ec_read(ec, (u8) address, &temp);
- *value = (acpi_integer) temp;
+ temp = 0;
+ result = acpi_ec_read(ec, (u8) address, (u32 *)&temp);
break;
case ACPI_WRITE:
- result = acpi_ec_write(ec, (u8) address, (u8) *value);
+ result = acpi_ec_write(ec, (u8) address, (u8) temp);
break;
default:
result = -EINVAL;
}
bit_width -= 8;
- if(bit_width){
-
- if(function == ACPI_READ)
- f_v |= (acpi_integer) (*value) << 8*i;
- if(function == ACPI_WRITE)
- (*value) >>=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 |= (acpi_integer) (*value) << 8*i;
+ if (function == ACPI_READ) {
+ f_v |= temp << 8 * i;
*value = f_v;
}
default:
return_VALUE(AE_OK);
}
-
-
}
static int
acpi_ec_read_info (struct seq_file *seq, void *offset)
{
- struct acpi_ec *ec = (struct acpi_ec *) seq->private;
+ union acpi_ec *ec = (union acpi_ec *) seq->private;
ACPI_FUNCTION_TRACE("acpi_ec_read_info");
goto end;
seq_printf(seq, "gpe bit: 0x%02x\n",
- (u32) ec->gpe_bit);
+ (u32) ec->common.gpe_bit);
seq_printf(seq, "ports: 0x%02x, 0x%02x\n",
- (u32) ec->status_addr.address, (u32) ec->data_addr.address);
+ (u32) ec->common.status_addr.address, (u32) ec->common.data_addr.address);
seq_printf(seq, "use global lock: %s\n",
- ec->global_lock?"yes":"no");
+ ec->common.global_lock?"yes":"no");
+ acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
end:
return_VALUE(0);
Driver Interface
-------------------------------------------------------------------------- */
+
static int
-acpi_ec_add (
+acpi_ec_polling_add (
struct acpi_device *device)
{
int result = 0;
acpi_status status = AE_OK;
- struct acpi_ec *ec = NULL;
+ union acpi_ec *ec = NULL;
unsigned long uid;
ACPI_FUNCTION_TRACE("acpi_ec_add");
if (!device)
return_VALUE(-EINVAL);
- ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+ ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec)
return_VALUE(-ENOMEM);
- memset(ec, 0, sizeof(struct acpi_ec));
+ memset(ec, 0, sizeof(union acpi_ec));
- ec->handle = device->handle;
- ec->uid = -1;
- spin_lock_init(&ec->lock);
+ ec->common.handle = device->handle;
+ ec->common.uid = -1;
+ spin_lock_init(&ec->polling.lock);
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
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->common.handle, "_GLK", NULL, &ec->common.global_lock);
/* If our UID matches the UID for the ECDT-enumerated EC,
we now have the *real* EC info, so kill the makeshift one.*/
- acpi_evaluate_integer(ec->handle, "_UID", NULL, &uid);
- if (ec_ecdt && ec_ecdt->uid == uid) {
+ acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid);
+ if (ec_ecdt && ec_ecdt->common.uid == uid) {
acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler);
- acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit, &acpi_ec_gpe_handler);
+ acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, &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->common.handle, "_GPE", NULL, &ec->common.gpe_bit);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error obtaining GPE bit assignment\n"));
+ result = -ENODEV;
+ goto end;
+ }
+
+ result = acpi_ec_add_fs(device);
+ if (result)
+ goto end;
+
+ printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ (u32) ec->common.gpe_bit);
+
+ if (!first_ec)
+ first_ec = device;
+
+end:
+ if (result)
+ kfree(ec);
+
+ return_VALUE(result);
+}
+static int
+acpi_ec_burst_add (
+ struct acpi_device *device)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ union acpi_ec *ec = NULL;
+ unsigned long uid;
+
+ ACPI_FUNCTION_TRACE("acpi_ec_add");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ if (!ec)
+ return_VALUE(-ENOMEM);
+ memset(ec, 0, sizeof(union acpi_ec));
+
+ ec->common.handle = device->handle;
+ ec->common.uid = -1;
+ atomic_set(&ec->burst.pending_gpe, 0);
+ atomic_set(&ec->burst.leaving_burst , 1);
+ init_MUTEX(&ec->burst.sem);
+ init_waitqueue_head(&ec->burst.wait);
+ strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
+ strcpy(acpi_device_class(device), ACPI_EC_CLASS);
+ acpi_driver_data(device) = ec;
+
+ /* Use the global lock for all EC transactions? */
+ acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, &ec->common.global_lock);
+
+ /* If our UID matches the UID for the ECDT-enumerated EC,
+ we now have the *real* EC info, so kill the makeshift one.*/
+ acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid);
+ if (ec_ecdt && ec_ecdt->common.uid == uid) {
+ acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
+ ACPI_ADR_SPACE_EC, &acpi_ec_space_handler);
+
+ acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, &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_bit);
+ status = acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, &ec->common.gpe_bit);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error obtaining GPE bit assignment\n"));
printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n",
acpi_device_name(device), acpi_device_bid(device),
- (u32) ec->gpe_bit);
+ (u32) ec->common.gpe_bit);
if (!first_ec)
first_ec = device;
struct acpi_device *device,
int type)
{
- struct acpi_ec *ec = NULL;
+ union acpi_ec *ec = NULL;
ACPI_FUNCTION_TRACE("acpi_ec_remove");
struct acpi_resource *resource,
void *context)
{
- struct acpi_ec *ec = (struct acpi_ec *) context;
+ union acpi_ec *ec = (union acpi_ec *) context;
struct acpi_generic_address *addr;
if (resource->id != ACPI_RSTYPE_IO) {
* the second address region returned is the status/command
* port.
*/
- if (ec->data_addr.register_bit_width == 0) {
- addr = &ec->data_addr;
- } else if (ec->command_addr.register_bit_width == 0) {
- addr = &ec->command_addr;
+ if (ec->common.data_addr.register_bit_width == 0) {
+ addr = &ec->common.data_addr;
+ } else if (ec->common.command_addr.register_bit_width == 0) {
+ addr = &ec->common.command_addr;
} else {
return AE_CTRL_TERMINATE;
}
struct acpi_device *device)
{
acpi_status status = AE_OK;
- struct acpi_ec *ec = NULL;
+ union acpi_ec *ec = NULL;
ACPI_FUNCTION_TRACE("acpi_ec_start");
/*
* Get I/O port addresses. Convert to GAS format.
*/
- status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS,
+ status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec);
- if (ACPI_FAILURE(status) || ec->command_addr.register_bit_width == 0) {
+ if (ACPI_FAILURE(status) || ec->common.command_addr.register_bit_width == 0) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error getting I/O port addresses"));
return_VALUE(-ENODEV);
}
- ec->status_addr = ec->command_addr;
+ ec->common.status_addr = ec->common.command_addr;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n",
- (u32) ec->gpe_bit, (u32) ec->command_addr.address,
- (u32) ec->data_addr.address));
+ (u32) ec->common.gpe_bit, (u32) ec->common.command_addr.address,
+ (u32) ec->common.data_addr.address));
+
/*
* Install GPE handler
*/
- status = acpi_install_gpe_handler(NULL, ec->gpe_bit,
+ status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit,
ACPI_GPE_EDGE_TRIGGERED, &acpi_ec_gpe_handler, ec);
if (ACPI_FAILURE(status)) {
return_VALUE(-ENODEV);
}
- acpi_set_gpe_type (NULL, ec->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
- acpi_enable_gpe (NULL, ec->gpe_bit, ACPI_NOT_ISR);
+ acpi_set_gpe_type (NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
+ acpi_enable_gpe (NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
- status = acpi_install_address_space_handler (ec->handle,
+ status = acpi_install_address_space_handler (ec->common.handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler,
&acpi_ec_space_setup, ec);
if (ACPI_FAILURE(status)) {
- acpi_remove_gpe_handler(NULL, ec->gpe_bit, &acpi_ec_gpe_handler);
+ acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, &acpi_ec_gpe_handler);
return_VALUE(-ENODEV);
}
int type)
{
acpi_status status = AE_OK;
- struct acpi_ec *ec = NULL;
+ union acpi_ec *ec = NULL;
ACPI_FUNCTION_TRACE("acpi_ec_stop");
ec = acpi_driver_data(device);
- status = acpi_remove_address_space_handler(ec->handle,
+ status = acpi_remove_address_space_handler(ec->common.handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
- status = acpi_remove_gpe_handler(NULL, ec->gpe_bit, &acpi_ec_gpe_handler);
+ status = acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, &acpi_ec_gpe_handler);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
void *context,
void **retval)
{
+
+ if (acpi_ec_polling_mode)
+ return acpi_fake_ecdt_polling_callback(handle,
+ Level, context, retval);
+ else
+ return acpi_fake_ecdt_burst_callback(handle,
+ Level, context, retval);
+}
+
+static acpi_status __init
+acpi_fake_ecdt_polling_callback (
+ acpi_handle handle,
+ u32 Level,
+ void *context,
+ void **retval)
+{
+ acpi_status status;
+
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+ acpi_ec_io_ports, ec_ecdt);
+ if (ACPI_FAILURE(status))
+ return status;
+ ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
+
+ ec_ecdt->common.uid = -1;
+ acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
+
+ status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->common.gpe_bit);
+ if (ACPI_FAILURE(status))
+ return status;
+ spin_lock_init(&ec_ecdt->polling.lock);
+ ec_ecdt->common.global_lock = TRUE;
+ ec_ecdt->common.handle = handle;
+
+ printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
+ (u32) ec_ecdt->common.gpe_bit, (u32) ec_ecdt->common.command_addr.address,
+ (u32) ec_ecdt->common.data_addr.address);
+
+ return AE_CTRL_TERMINATE;
+}
+
+static acpi_status __init
+acpi_fake_ecdt_burst_callback (
+ acpi_handle handle,
+ u32 Level,
+ void *context,
+ void **retval)
+{
acpi_status status;
+ init_MUTEX(&ec_ecdt->burst.sem);
+ init_waitqueue_head(&ec_ecdt->burst.wait);
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec_ecdt);
if (ACPI_FAILURE(status))
return status;
- ec_ecdt->status_addr = ec_ecdt->command_addr;
+ ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
- ec_ecdt->uid = -1;
- acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
+ ec_ecdt->common.uid = -1;
+ acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
- status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe_bit);
+ status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->common.gpe_bit);
if (ACPI_FAILURE(status))
return status;
- spin_lock_init(&ec_ecdt->lock);
- ec_ecdt->global_lock = TRUE;
- ec_ecdt->handle = handle;
+ ec_ecdt->common.global_lock = TRUE;
+ ec_ecdt->common.handle = handle;
printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
- (u32) ec_ecdt->gpe_bit, (u32) ec_ecdt->command_addr.address,
- (u32) ec_ecdt->data_addr.address);
+ (u32) ec_ecdt->common.gpe_bit, (u32) ec_ecdt->common.command_addr.address,
+ (u32) ec_ecdt->common.data_addr.address);
return AE_CTRL_TERMINATE;
}
printk(KERN_INFO PREFIX "Try to make an fake ECDT\n");
- ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+ ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec_ecdt) {
ret = -ENOMEM;
goto error;
}
- memset(ec_ecdt, 0, sizeof(struct acpi_ec));
+ memset(ec_ecdt, 0, sizeof(union acpi_ec));
status = acpi_get_devices (ACPI_EC_HID,
acpi_fake_ecdt_callback,
static int __init
acpi_ec_get_real_ecdt(void)
+{
+ if (acpi_ec_polling_mode)
+ return acpi_ec_polling_get_real_ecdt();
+ else
+ return acpi_ec_burst_get_real_ecdt();
+}
+
+static int __init
+acpi_ec_polling_get_real_ecdt(void)
{
acpi_status status;
struct acpi_table_ecdt *ecdt_ptr;
/*
* Generate a temporary ec context to use until the namespace is scanned
*/
- ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+ ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec_ecdt)
return -ENOMEM;
- memset(ec_ecdt, 0, sizeof(struct acpi_ec));
+ memset(ec_ecdt, 0, sizeof(union acpi_ec));
+
+ ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
+ ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
+ ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
+ ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
+ spin_lock_init(&ec_ecdt->polling.lock);
+ /* use the GL just to be safe */
+ ec_ecdt->common.global_lock = TRUE;
+ ec_ecdt->common.uid = ecdt_ptr->uid;
+
+ status = acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
+ if (ACPI_FAILURE(status)) {
+ goto error;
+ }
+
+ return 0;
+error:
+ printk(KERN_ERR PREFIX "Could not use ECDT\n");
+ kfree(ec_ecdt);
+ ec_ecdt = NULL;
+
+ return -ENODEV;
+}
+
+
+static int __init
+acpi_ec_burst_get_real_ecdt(void)
+{
+ acpi_status status;
+ struct acpi_table_ecdt *ecdt_ptr;
+
+ status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING,
+ (struct acpi_table_header **) &ecdt_ptr);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ printk(KERN_INFO PREFIX "Found ECDT\n");
- ec_ecdt->command_addr = ecdt_ptr->ec_control;
- ec_ecdt->status_addr = ecdt_ptr->ec_control;
- ec_ecdt->data_addr = ecdt_ptr->ec_data;
- ec_ecdt->gpe_bit = ecdt_ptr->gpe_bit;
- spin_lock_init(&ec_ecdt->lock);
+ /*
+ * Generate a temporary ec context to use until the namespace is scanned
+ */
+ ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ if (!ec_ecdt)
+ return -ENOMEM;
+ memset(ec_ecdt, 0, sizeof(union acpi_ec));
+
+ init_MUTEX(&ec_ecdt->burst.sem);
+ init_waitqueue_head(&ec_ecdt->burst.wait);
+ ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
+ ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
+ ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
+ ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
/* use the GL just to be safe */
- ec_ecdt->global_lock = TRUE;
- ec_ecdt->uid = ecdt_ptr->uid;
+ ec_ecdt->common.global_lock = TRUE;
+ ec_ecdt->common.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->common.handle);
if (ACPI_FAILURE(status)) {
goto error;
}
/*
* Install GPE handler
*/
- status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe_bit,
+ status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
ACPI_GPE_EDGE_TRIGGERED, &acpi_ec_gpe_handler,
ec_ecdt);
if (ACPI_FAILURE(status)) {
goto error;
}
- acpi_set_gpe_type (NULL, ec_ecdt->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
- acpi_enable_gpe (NULL, ec_ecdt->gpe_bit, ACPI_NOT_ISR);
+ acpi_set_gpe_type (NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
+ acpi_enable_gpe (NULL, ec_ecdt->common.gpe_bit, 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_bit,
+ acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
&acpi_ec_gpe_handler);
goto error;
}
acpi_fake_ecdt_enabled = 1;
return 0;
}
+
__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup);
+static int __init acpi_ec_set_polling_mode(char *str)
+{
+ int burst;
+
+ if (!get_option(&str, &burst))
+ return 0;
+
+ if (burst) {
+ acpi_ec_polling_mode = EC_BURST;
+ acpi_ec_driver.ops.add = acpi_ec_burst_add;
+ } else {
+ acpi_ec_polling_mode = EC_POLLING;
+ acpi_ec_driver.ops.add = acpi_ec_polling_add;
+ }
+ printk(KERN_INFO PREFIX "EC %s mode.\n",
+ burst ? "burst": "polling");
+ return 0;
+}
+__setup("ec_burst=", acpi_ec_set_polling_mode);
projects / linux-2.6 / blobdiff