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Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/ec.c325
1 files changed, 95 insertions, 230 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index e5d79636285..a0dcbad97c4 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -122,12 +122,12 @@ union acpi_ec {
static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event);
static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event);
-static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data);
-static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data);
-static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data);
-static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data);
-static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data);
-static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data);
+static int acpi_ec_poll_transaction(union acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len);
+static int acpi_ec_intr_transaction(union 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);
@@ -302,110 +302,95 @@ end:
}
#endif /* ACPI_FUTURE_USAGE */
-static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data)
+static int acpi_ec_transaction(union acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
if (acpi_ec_poll_mode)
- return acpi_ec_poll_read(ec, address, data);
+ return acpi_ec_poll_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
else
- return acpi_ec_intr_read(ec, address, data);
+ return acpi_ec_intr_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
+}
+static int acpi_ec_read(union 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(union acpi_ec *ec, u8 address, u8 data)
{
- if (acpi_ec_poll_mode)
- return acpi_ec_poll_write(ec, address, data);
- else
- return acpi_ec_intr_write(ec, address, data);
+ u8 wdata[2] = { address, data };
+ return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE, wdata, 2, NULL, 0);
}
-static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data)
+
+static int acpi_ec_transaction_unlocked(union acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
- acpi_status status = AE_OK;
- int result = 0;
- u32 glk = 0;
+ int result;
+ acpi_hw_low_level_write(8, command, &ec->common.command_addr);
- if (!ec || !data)
- return -EINVAL;
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (result)
+ return result;
- *data = 0;
+ for (; wdata_len > 0; wdata_len --) {
- if (ec->common.global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
+ acpi_hw_low_level_write(8, *(wdata++), &ec->common.data_addr);
- if (down_interruptible(&ec->poll.sem)) {
- result = -ERESTARTSYS;
- goto end_nosem;
- }
-
- 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;
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+ if (result)
+ return result;
+ }
- 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->common.data_addr);
+ for (; rdata_len > 0; rdata_len --) {
+ u32 d;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
- *data, address));
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
+ if (result)
+ return result;
- end:
- up(&ec->poll.sem);
-end_nosem:
- if (ec->common.global_lock)
- acpi_release_global_lock(glk);
+ acpi_hw_low_level_read(8, &d, &ec->common.data_addr);
+ *(rdata++) = (u8) d;
+ }
- return result;
+ return 0;
}
-static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data)
+static int acpi_ec_poll_transaction(union acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
- int result = 0;
acpi_status status = AE_OK;
+ int result;
u32 glk = 0;
-
- if (!ec)
+ if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
return -EINVAL;
+ if (rdata)
+ memset(rdata, 0, rdata_len);
+
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return -ENODEV;
- }
+ }
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
}
-
- 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->common.data_addr);
- result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
- if (result)
- goto end;
-
- acpi_hw_low_level_write(8, data, &ec->common.data_addr);
- result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
- if (result)
- goto end;
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
- data, address));
-
- end:
+ result = acpi_ec_transaction_unlocked(ec, command,
+ wdata, wdata_len,
+ rdata, rdata_len);
up(&ec->poll.sem);
+
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
@@ -413,16 +398,18 @@ end_nosem:
return result;
}
-static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data)
+static int acpi_ec_intr_transaction(union acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
- int status = 0;
+ int status;
u32 glk;
-
- if (!ec || !data)
+ if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
return -EINVAL;
- *data = 0;
+ if (rdata)
+ memset(rdata, 0, rdata_len);
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
@@ -438,72 +425,12 @@ static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data)
printk(KERN_DEBUG PREFIX "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);
- if (status) {
- printk(KERN_DEBUG PREFIX "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) {
- printk(KERN_DEBUG PREFIX "read EC, OB not full\n");
- goto end;
- }
- 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:
- up(&ec->intr.sem);
-
- if (ec->common.global_lock)
- acpi_release_global_lock(glk);
-
- return status;
-}
-
-static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data)
-{
- int status = 0;
- u32 glk;
-
-
- if (!ec)
- return -EINVAL;
-
- if (ec->common.global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
-
- WARN_ON(in_interrupt());
- down(&ec->intr.sem);
-
- status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
- if (status) {
- printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
- }
- acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
- &ec->common.command_addr);
- status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
- if (status) {
- printk(KERN_DEBUG PREFIX "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) {
- printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
- }
- acpi_hw_low_level_write(8, data, &ec->common.data_addr);
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
- data, address));
+ status = acpi_ec_transaction_unlocked(ec, command,
+ wdata, wdata_len,
+ rdata, rdata_len);
+end:
up(&ec->intr.sem);
if (ec->common.global_lock)
@@ -554,106 +481,44 @@ int ec_write(u8 addr, u8 val)
EXPORT_SYMBOL(ec_write);
-static int acpi_ec_query(union acpi_ec *ec, u32 * data)
-{
- if (acpi_ec_poll_mode)
- return acpi_ec_poll_query(ec, data);
- else
- return acpi_ec_intr_query(ec, data);
-}
-static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data)
+extern int ec_transaction(u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
- int result = 0;
- acpi_status status = AE_OK;
- u32 glk = 0;
-
-
- if (!ec || !data)
- return -EINVAL;
-
- *data = 0;
-
- if (ec->common.global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
-
- /*
- * 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).
- */
- if (down_interruptible(&ec->poll.sem)) {
- result = -ERESTARTSYS;
- goto end_nosem;
- }
-
- 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;
+ union acpi_ec *ec;
- acpi_hw_low_level_read(8, data, &ec->common.data_addr);
- if (!*data)
- result = -ENODATA;
+ if (!first_ec)
+ return -ENODEV;
- end:
- up(&ec->poll.sem);
-end_nosem:
- if (ec->common.global_lock)
- acpi_release_global_lock(glk);
+ ec = acpi_driver_data(first_ec);
- return result;
+ return acpi_ec_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
}
-static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data)
-{
- int status = 0;
- u32 glk;
+EXPORT_SYMBOL(ec_transaction);
- if (!ec || !data)
- return -EINVAL;
- *data = 0;
+static int acpi_ec_query(union acpi_ec *ec, u32 * data) {
+ int result;
+ u8 d;
- if (ec->common.global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
+ if (!ec || !data)
+ return -EINVAL;
- down(&ec->intr.sem);
+ /*
+ * 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).
+ */
- status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
- if (status) {
- printk(KERN_DEBUG PREFIX "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
- * 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) {
- printk(KERN_DEBUG PREFIX "query EC, OB not full\n");
- goto end;
- }
-
- acpi_hw_low_level_read(8, data, &ec->common.data_addr);
- if (!*data)
- status = -ENODATA;
+ result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
+ if (result)
+ return result;
- end:
- up(&ec->intr.sem);
+ if (!d)
+ return -ENODATA;
- if (ec->common.global_lock)
- acpi_release_global_lock(glk);
-
- return status;
+ *data = d;
+ return 0;
}
/* --------------------------------------------------------------------------
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