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authorLen Brown <len.brown@intel.com>2007-05-10 04:06:12 -0400
committerLen Brown <len.brown@intel.com>2007-05-10 04:06:12 -0400
commitf685648e7d6520653fa2641840cccc58ba8ef8e0 (patch)
treed93e9106d18cd53a63e5ae94999f53b39e52053e /drivers/acpi
parentf142051505154da4ba689e129deb06524c5ece8a (diff)
parent00eb43a1897a8845d0edb198cec69ac5f1f299dd (diff)
Pull misc-for-upstream into release branch
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/ec.c39
1 files changed, 23 insertions, 16 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index e08cf98f504..82f496c0767 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -147,9 +147,10 @@ static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event,
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))
@@ -173,14 +174,15 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, unsigned count)
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);
@@ -191,7 +193,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 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);
@@ -202,7 +204,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 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);
@@ -217,7 +219,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 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;
@@ -240,7 +243,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
/* 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
"input buffer is not empty, aborting transaction\n");
@@ -249,7 +252,8 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
status = acpi_ec_transaction_unlocked(ec, command,
wdata, wdata_len,
- rdata, rdata_len);
+ rdata, rdata_len,
+ force_poll);
end:
@@ -267,12 +271,12 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
int acpi_ec_burst_enable(struct acpi_ec *ec)
{
u8 d;
- return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1);
+ 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);
+ 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)
@@ -281,7 +285,7 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
u8 d;
result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
- &address, 1, &d, 1);
+ &address, 1, &d, 1, 0);
*data = d;
return result;
}
@@ -290,7 +294,7 @@ 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,
- wdata, 2, NULL, 0);
+ wdata, 2, NULL, 0, 0);
}
/*
@@ -349,13 +353,15 @@ EXPORT_SYMBOL(ec_write);
int ec_transaction(u8 command,
const u8 * wdata, unsigned wdata_len,
- u8 * rdata, unsigned rdata_len)
+ u8 * rdata, unsigned rdata_len,
+ int force_poll)
{
if (!first_ec)
return -ENODEV;
return acpi_ec_transaction(first_ec, command, wdata,
- wdata_len, rdata, rdata_len);
+ wdata_len, rdata, rdata_len,
+ force_poll);
}
EXPORT_SYMBOL(ec_transaction);
@@ -374,7 +380,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
* 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;
@@ -410,6 +416,7 @@ static u32 acpi_ec_gpe_handler(void *data)
acpi_status status = AE_OK;
u8 value;
struct acpi_ec *ec = data;
+
atomic_inc(&ec->event_count);
if (acpi_ec_mode == EC_INTR) {