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Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/ec.c171
1 files changed, 59 insertions, 112 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index b15f5ec81d05..7e1a445955bc 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -212,19 +212,29 @@ static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event)
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));
+ switch (event) {
+ case ACPI_EC_EVENT_OBF:
+ if (acpi_ec_read_status(ec) & event) {
+ ec->burst.expect_event = 0;
+ return_VALUE(0);
+ }
+ break;
+
+ case ACPI_EC_EVENT_IBE:
+ if (~acpi_ec_read_status(ec) & event) {
+ ec->burst.expect_event = 0;
+ return_VALUE(0);
+ }
+ break;
+ }
+
+ result = wait_event_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
@@ -254,15 +264,15 @@ static int acpi_ec_enter_burst_mode(union acpi_ec *ec)
status = acpi_ec_read_status(ec);
if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) {
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (status)
+ goto end;
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);
+ if (status)
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);
}
@@ -270,30 +280,17 @@ static int acpi_ec_enter_burst_mode(union acpi_ec *ec)
atomic_set(&ec->burst.leaving_burst, 0);
return_VALUE(0);
+ end:
+ printk("Error in acpi_ec_wait\n");
+ return_VALUE(-1);
}
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);
}
@@ -416,7 +413,6 @@ static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data)
if (!ec || !data)
return_VALUE(-EINVAL);
- retry:
*data = 0;
if (ec->common.global_lock) {
@@ -428,27 +424,26 @@ static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data)
WARN_ON(in_interrupt());
down(&ec->burst.sem);
- if (acpi_ec_enter_burst_mode(ec))
+ acpi_ec_enter_burst_mode(ec);
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (status) {
+ printk("read EC, IB not empty\n");
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;
+ printk("read EC, IB not empty\n");
}
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);
+ printk("read EC, OB not full\n");
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));
@@ -459,15 +454,6 @@ static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data)
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);
}
@@ -475,13 +461,12 @@ 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))
@@ -491,62 +476,36 @@ static int acpi_ec_burst_write(union acpi_ec *ec, u8 address, u8 data)
WARN_ON(in_interrupt());
down(&ec->burst.sem);
- if (acpi_ec_enter_burst_mode(ec))
- goto end;
+ acpi_ec_enter_burst_mode(ec);
- 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;
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (status) {
+ printk("write EC, IB not empty\n");
}
- /*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;
+ printk("write EC, IB not empty\n");
}
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;
+ printk("write EC, IB not empty\n");
}
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);
}
@@ -662,8 +621,12 @@ static int acpi_ec_burst_query(union acpi_ec *ec, u32 * data)
}
down(&ec->burst.sem);
- if (acpi_ec_enter_burst_mode(ec))
+
+ status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (status) {
+ printk("query EC, IB not empty\n");
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
@@ -673,27 +636,20 @@ static int acpi_ec_burst_query(union acpi_ec *ec, u32 * data)
&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);
+ printk("query EC, OB not full\n");
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);
}
@@ -818,31 +774,21 @@ static u32 acpi_ec_gpe_burst_handler(void *data)
if (!ec)
return ACPI_INTERRUPT_NOT_HANDLED;
- acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
-
+ acpi_clear_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 */
+ switch (ec->burst.expect_event) {
+ case ACPI_EC_EVENT_OBF:
+ if (!(value & ACPI_EC_FLAG_OBF))
+ break;
+ case ACPI_EC_EVENT_IBE:
+ if ((value & ACPI_EC_FLAG_IBF))
+ break;
+ ec->burst.expect_event = 0;
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;
- }
+ return ACPI_INTERRUPT_HANDLED;
+ default:
+ break;
}
if (value & ACPI_EC_FLAG_SCI) {
@@ -1166,6 +1112,7 @@ static int acpi_ec_burst_add(struct acpi_device *device)
if (result)
goto end;
+ printk("burst-mode-ec-10-Aug\n");
printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n",
acpi_device_name(device), acpi_device_bid(device),
(u32) ec->common.gpe_bit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 09:00:49 +0100