ACPI: EC: Unify poll and interrupt mode transaction functions
Signed-off-by: Alexey Y. Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index c816b4e..9c7fce6 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -112,12 +112,6 @@
static struct acpi_device *first_ec;
static int acpi_ec_mode = EC_INTR;
-static int acpi_ec_poll_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len);
-static int acpi_ec_intr_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len);
static void acpi_ec_gpe_poll_query(void *ec_cxt);
static void acpi_ec_gpe_intr_query(void *ec_cxt);
static u32 acpi_ec_gpe_poll_handler(void *data);
@@ -257,32 +251,9 @@
}
#endif /* ACPI_FUTURE_USAGE */
-static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
-{
- if (acpi_ec_mode == EC_POLL)
- return acpi_ec_poll_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
- else
- return acpi_ec_intr_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
-}
-static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data)
-{
- int result;
- u8 d;
- result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ, &address, 1, &d, 1);
- *data = d;
- return result;
-}
-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);
-}
-
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;
@@ -292,9 +263,8 @@
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (result)
return result;
-
acpi_ec_write_data(ec, *(wdata++));
- }
+ }
if (command == ACPI_EC_COMMAND_WRITE) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
@@ -316,46 +286,9 @@
return 0;
}
-static int acpi_ec_poll_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
-{
- acpi_status status = AE_OK;
- int result;
- u32 glk = 0;
-
- if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
- return -EINVAL;
-
- if (rdata)
- memset(rdata, 0, rdata_len);
-
- if (ec->global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
-
- if (down_interruptible(&ec->sem)) {
- result = -ERESTARTSYS;
- goto end_nosem;
- }
-
- result = acpi_ec_transaction_unlocked(ec, command,
- wdata, wdata_len,
- rdata, rdata_len);
- up(&ec->sem);
-
-end_nosem:
- if (ec->global_lock)
- acpi_release_global_lock(glk);
-
- return result;
-}
-
-static int acpi_ec_intr_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
+static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
int status;
u32 glk;
@@ -371,13 +304,11 @@
if (ACPI_FAILURE(status))
return -ENODEV;
}
-
- WARN_ON(in_interrupt());
down(&ec->sem);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (status) {
- ACPI_EXCEPTION((AE_INFO, status, "read EC, IB not empty"));
+ printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
goto end;
}
@@ -394,6 +325,23 @@
return status;
}
+static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data)
+{
+ int result;
+ u8 d;
+
+ result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
+ &address, 1, &d, 1);
+ *data = d;
+ return result;
+}
+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);
+}
+
/*
* Externally callable EC access functions. For now, assume 1 EC only
*/
@@ -447,13 +395,13 @@
ec = acpi_driver_data(first_ec);
- return acpi_ec_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
+ return acpi_ec_transaction(ec, command, wdata,
+ wdata_len, rdata, rdata_len);
}
-EXPORT_SYMBOL(ec_transaction);
-
-static int acpi_ec_query(struct acpi_ec *ec, u32 * data) {
- int result;
+static int acpi_ec_query(struct acpi_ec *ec, u32 * data)
+{
+ int result;
u8 d;
if (!ec || !data)