Commit 0af2f653 authored by Len Brown's avatar Len Brown

Revert "ACPI: EC: Workaround for optimized controllers"

This reverts commit f2d68935.
parent f2d68935
...@@ -75,8 +75,7 @@ enum { ...@@ -75,8 +75,7 @@ enum {
EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */ EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */
EC_FLAGS_QUERY_PENDING, /* Query is pending */ EC_FLAGS_QUERY_PENDING, /* Query is pending */
EC_FLAGS_GPE_MODE, /* Expect GPE to be sent for status change */ EC_FLAGS_GPE_MODE, /* Expect GPE to be sent for status change */
EC_FLAGS_NO_ADDRESS_GPE, /* Expect GPE only for non-address event */ EC_FLAGS_ONLY_IBF_GPE, /* Expect GPE only for IBF = 0 event */
EC_FLAGS_ADDRESS, /* Address is being written */
}; };
static int acpi_ec_remove(struct acpi_device *device, int type); static int acpi_ec_remove(struct acpi_device *device, int type);
...@@ -167,45 +166,38 @@ static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event) ...@@ -167,45 +166,38 @@ static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
{ {
int ret = 0;
if (unlikely(test_bit(EC_FLAGS_ADDRESS, &ec->flags) &&
test_bit(EC_FLAGS_NO_ADDRESS_GPE, &ec->flags)))
force_poll = 1;
if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) && if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) &&
likely(!force_poll)) { likely(!force_poll)) {
if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event), if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event),
msecs_to_jiffies(ACPI_EC_DELAY))) msecs_to_jiffies(ACPI_EC_DELAY)))
goto end; return 0;
clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
if (acpi_ec_check_status(ec, event)) { if (acpi_ec_check_status(ec, event)) {
if (test_bit(EC_FLAGS_ADDRESS, &ec->flags)) { if (event == ACPI_EC_EVENT_OBF_1) {
/* miss address GPE, don't expect it anymore */ /* miss OBF = 1 GPE, don't expect it anymore */
printk(KERN_INFO PREFIX "missing address confirmation," printk(KERN_INFO PREFIX "missing OBF_1 confirmation,"
"don't expect it any longer.\n"); "switching to degraded mode.\n");
set_bit(EC_FLAGS_NO_ADDRESS_GPE, &ec->flags); set_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags);
} else { } else {
/* missing GPEs, switch back to poll mode */ /* missing GPEs, switch back to poll mode */
printk(KERN_INFO PREFIX "missing confirmations," printk(KERN_INFO PREFIX "missing IBF_1 confirmations,"
"switch off interrupt mode.\n"); "switch off interrupt mode.\n");
clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
} }
goto end; return 0;
} }
} else { } else {
unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
while (time_before(jiffies, delay)) { while (time_before(jiffies, delay)) {
if (acpi_ec_check_status(ec, event)) if (acpi_ec_check_status(ec, event))
goto end; return 0;
} }
} }
printk(KERN_ERR PREFIX "acpi_ec_wait timeout," printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
" status = %d, expect_event = %d\n", " status = %d, expect_event = %d\n",
acpi_ec_read_status(ec), event); acpi_ec_read_status(ec), event);
ret = -ETIME; return -ETIME;
end:
clear_bit(EC_FLAGS_ADDRESS, &ec->flags);
return ret;
} }
static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
...@@ -224,9 +216,6 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, ...@@ -224,9 +216,6 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
"write_cmd timeout, command = %d\n", command); "write_cmd timeout, command = %d\n", command);
goto end; goto end;
} }
/* mark the address byte written to EC */
if (rdata_len + wdata_len > 1)
set_bit(EC_FLAGS_ADDRESS, &ec->flags);
set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
acpi_ec_write_data(ec, *(wdata++)); acpi_ec_write_data(ec, *(wdata++));
} }
...@@ -242,6 +231,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, ...@@ -242,6 +231,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
for (; rdata_len > 0; --rdata_len) { for (; rdata_len > 0; --rdata_len) {
if (test_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags))
force_poll = 1;
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll); result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll);
if (result) { if (result) {
printk(KERN_ERR PREFIX "read timeout, command = %d\n", printk(KERN_ERR PREFIX "read timeout, command = %d\n",
......
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