* POSSIBILITY OF SUCH DAMAGES.
*/
-#include <linux/module.h>
-
#include <acpi/acpi.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>
* DESCRIPTION: Clears all fixed and general purpose status bits
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
+ * NOTE: TBD: Flags parameter is obsolete, to be removed
+ *
******************************************************************************/
acpi_status acpi_hw_clear_acpi_status(u32 flags)
{
acpi_status status;
+ acpi_cpu_flags lock_flags = 0;
- ACPI_FUNCTION_TRACE("hw_clear_acpi_status");
+ ACPI_FUNCTION_TRACE(hw_clear_acpi_status);
ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %04X\n",
ACPI_BITMASK_ALL_FIXED_STATUS,
(u16) acpi_gbl_FADT->xpm1a_evt_blk.address));
- if (flags & ACPI_MTX_LOCK) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_STATUS,
status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block);
unlock_and_exit:
- if (flags & ACPI_MTX_LOCK) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
- }
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
return_ACPI_STATUS(status);
}
acpi_get_sleep_type_data(u8 sleep_state, u8 * sleep_type_a, u8 * sleep_type_b)
{
acpi_status status = AE_OK;
- struct acpi_parameter_info info;
- char *sleep_state_name;
+ struct acpi_evaluate_info *info;
- ACPI_FUNCTION_TRACE("acpi_get_sleep_type_data");
+ ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data);
/* Validate parameters */
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- /* Evaluate the namespace object containing the values for this state */
+ /* Allocate the evaluation information block */
- info.parameters = NULL;
- info.return_object = NULL;
- sleep_state_name =
+ info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
+ if (!info) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ info->pathname =
ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]);
- status = acpi_ns_evaluate_by_name(sleep_state_name, &info);
+ /* Evaluate the namespace object containing the values for this state */
+
+ status = acpi_ns_evaluate(info);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "%s while evaluating sleep_state [%s]\n",
+ "%s while evaluating SleepState [%s]\n",
acpi_format_exception(status),
- sleep_state_name));
+ info->pathname));
- return_ACPI_STATUS(status);
+ goto cleanup;
}
/* Must have a return object */
- if (!info.return_object) {
+ if (!info->return_object) {
ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]",
- sleep_state_name));
+ info->pathname));
status = AE_NOT_EXIST;
}
/* It must be of type Package */
- else if (ACPI_GET_OBJECT_TYPE(info.return_object) != ACPI_TYPE_PACKAGE) {
+ else if (ACPI_GET_OBJECT_TYPE(info->return_object) != ACPI_TYPE_PACKAGE) {
ACPI_ERROR((AE_INFO,
"Sleep State return object is not a Package"));
status = AE_AML_OPERAND_TYPE;
}
/*
- * The package must have at least two elements. NOTE (March 2005): This
+ * The package must have at least two elements. NOTE (March 2005): This
* goes against the current ACPI spec which defines this object as a
- * package with one encoded DWORD element. However, existing practice
+ * package with one encoded DWORD element. However, existing practice
* by BIOS vendors seems to be to have 2 or more elements, at least
* one per sleep type (A/B).
*/
- else if (info.return_object->package.count < 2) {
+ else if (info->return_object->package.count < 2) {
ACPI_ERROR((AE_INFO,
"Sleep State return package does not have at least two elements"));
status = AE_AML_NO_OPERAND;
/* The first two elements must both be of type Integer */
- else if ((ACPI_GET_OBJECT_TYPE(info.return_object->package.elements[0])
+ else if ((ACPI_GET_OBJECT_TYPE(info->return_object->package.elements[0])
!= ACPI_TYPE_INTEGER) ||
- (ACPI_GET_OBJECT_TYPE(info.return_object->package.elements[1])
+ (ACPI_GET_OBJECT_TYPE(info->return_object->package.elements[1])
!= ACPI_TYPE_INTEGER)) {
ACPI_ERROR((AE_INFO,
"Sleep State return package elements are not both Integers (%s, %s)",
- acpi_ut_get_object_type_name(info.return_object->
+ acpi_ut_get_object_type_name(info->return_object->
package.elements[0]),
- acpi_ut_get_object_type_name(info.return_object->
+ acpi_ut_get_object_type_name(info->return_object->
package.elements[1])));
status = AE_AML_OPERAND_TYPE;
} else {
/* Valid _Sx_ package size, type, and value */
*sleep_type_a = (u8)
- (info.return_object->package.elements[0])->integer.value;
+ (info->return_object->package.elements[0])->integer.value;
*sleep_type_b = (u8)
- (info.return_object->package.elements[1])->integer.value;
+ (info->return_object->package.elements[1])->integer.value;
}
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
- "While evaluating sleep_state [%s], bad Sleep object %p type %s",
- sleep_state_name, info.return_object,
- acpi_ut_get_object_type_name(info.
+ "While evaluating SleepState [%s], bad Sleep object %p type %s",
+ info->pathname, info->return_object,
+ acpi_ut_get_object_type_name(info->
return_object)));
}
- acpi_ut_remove_reference(info.return_object);
+ acpi_ut_remove_reference(info->return_object);
+
+ cleanup:
+ ACPI_FREE(info);
return_ACPI_STATUS(status);
}
-EXPORT_SYMBOL(acpi_get_sleep_type_data);
+ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data)
/*******************************************************************************
*
* DESCRIPTION: Map register_id into a register bitmask.
*
******************************************************************************/
-
struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id)
{
ACPI_FUNCTION_ENTRY();
if (register_id > ACPI_BITREG_MAX) {
- ACPI_ERROR((AE_INFO, "Invalid bit_register ID: %X",
+ ACPI_ERROR((AE_INFO, "Invalid BitRegister ID: %X",
register_id));
return (NULL);
}
* return_value - Value that was read from the register
* Flags - Lock the hardware or not
*
- * RETURN: Status and the value read from specified Register. Value
+ * RETURN: Status and the value read from specified Register. Value
* returned is normalized to bit0 (is shifted all the way right)
*
* DESCRIPTION: ACPI bit_register read function.
*
+ * NOTE: TBD: Flags parameter is obsolete, to be removed
+ *
******************************************************************************/
acpi_status acpi_get_register(u32 register_id, u32 * return_value, u32 flags)
struct acpi_bit_register_info *bit_reg_info;
acpi_status status;
- ACPI_FUNCTION_TRACE("acpi_get_register");
+ ACPI_FUNCTION_TRACE(acpi_get_register);
/* Get the info structure corresponding to the requested ACPI Register */
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- if (flags & ACPI_MTX_LOCK) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
-
/* Read from the register */
- status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
+ status = acpi_hw_register_read(ACPI_MTX_LOCK,
bit_reg_info->parent_register,
®ister_value);
- if (flags & ACPI_MTX_LOCK) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
- }
-
if (ACPI_SUCCESS(status)) {
+
/* Normalize the value that was read */
register_value =
return_ACPI_STATUS(status);
}
-EXPORT_SYMBOL(acpi_get_register);
+ACPI_EXPORT_SYMBOL(acpi_get_register)
/*******************************************************************************
*
*
* DESCRIPTION: ACPI Bit Register write function.
*
+ * NOTE: TBD: Flags parameter is obsolete, to be removed
+ *
******************************************************************************/
-
acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags)
{
u32 register_value = 0;
struct acpi_bit_register_info *bit_reg_info;
acpi_status status;
+ acpi_cpu_flags lock_flags;
- ACPI_FUNCTION_TRACE_U32("acpi_set_register", register_id);
+ ACPI_FUNCTION_TRACE_U32(acpi_set_register, register_id);
/* Get the info structure corresponding to the requested ACPI Register */
bit_reg_info = acpi_hw_get_bit_register_info(register_id);
if (!bit_reg_info) {
- ACPI_ERROR((AE_INFO, "Bad ACPI HW register_id: %X",
+ ACPI_ERROR((AE_INFO, "Bad ACPI HW RegisterId: %X",
register_id));
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- if (flags & ACPI_MTX_LOCK) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
/* Always do a register read first so we can insert the new bits */
case ACPI_REGISTER_PM1_STATUS:
/*
- * Status Registers are different from the rest. Clear by
- * writing 1, and writing 0 has no effect. So, the only relevant
+ * Status Registers are different from the rest. Clear by
+ * writing 1, and writing 0 has no effect. So, the only relevant
* information is the single bit we're interested in, all others should
* be written as 0 so they will be left unchanged.
*/
unlock_and_exit:
- if (flags & ACPI_MTX_LOCK) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
- }
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
/* Normalize the value that was read */
return_ACPI_STATUS(status);
}
-EXPORT_SYMBOL(acpi_set_register);
+ACPI_EXPORT_SYMBOL(acpi_set_register)
/******************************************************************************
*
* FUNCTION: acpi_hw_register_read
*
- * PARAMETERS: use_lock - Mutex hw access
- * register_id - register_iD + Offset
+ * PARAMETERS: use_lock - Lock hardware? True/False
+ * register_id - ACPI Register ID
* return_value - Where the register value is returned
*
* RETURN: Status and the value read.
*
- * DESCRIPTION: Acpi register read function. Registers are read at the
- * given offset.
+ * DESCRIPTION: Read from the specified ACPI register
*
******************************************************************************/
-
acpi_status
acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value)
{
u32 value1 = 0;
u32 value2 = 0;
acpi_status status;
+ acpi_cpu_flags lock_flags = 0;
- ACPI_FUNCTION_TRACE("hw_register_read");
+ ACPI_FUNCTION_TRACE(hw_register_read);
if (ACPI_MTX_LOCK == use_lock) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
}
switch (register_id) {
unlock_and_exit:
if (ACPI_MTX_LOCK == use_lock) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
}
if (ACPI_SUCCESS(status)) {
*
* FUNCTION: acpi_hw_register_write
*
- * PARAMETERS: use_lock - Mutex hw access
- * register_id - register_iD + Offset
+ * PARAMETERS: use_lock - Lock hardware? True/False
+ * register_id - ACPI Register ID
* Value - The value to write
*
* RETURN: Status
*
- * DESCRIPTION: Acpi register Write function. Registers are written at the
- * given offset.
+ * DESCRIPTION: Write to the specified ACPI register
+ *
+ * NOTE: In accordance with the ACPI specification, this function automatically
+ * preserves the value of the following bits, meaning that these bits cannot be
+ * changed via this interface:
+ *
+ * PM1_CONTROL[0] = SCI_EN
+ * PM1_CONTROL[9]
+ * PM1_STATUS[11]
+ *
+ * ACPI References:
+ * 1) Hardware Ignored Bits: When software writes to a register with ignored
+ * bit fields, it preserves the ignored bit fields
+ * 2) SCI_EN: OSPM always preserves this bit position
*
******************************************************************************/
acpi_status acpi_hw_register_write(u8 use_lock, u32 register_id, u32 value)
{
acpi_status status;
+ acpi_cpu_flags lock_flags = 0;
+ u32 read_value;
- ACPI_FUNCTION_TRACE("hw_register_write");
+ ACPI_FUNCTION_TRACE(hw_register_write);
if (ACPI_MTX_LOCK == use_lock) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
}
switch (register_id) {
case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */
+ /* Perform a read first to preserve certain bits (per ACPI spec) */
+
+ status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
+ ACPI_REGISTER_PM1_STATUS,
+ &read_value);
+ if (ACPI_FAILURE(status)) {
+ goto unlock_and_exit;
+ }
+
+ /* Insert the bits to be preserved */
+
+ ACPI_INSERT_BITS(value, ACPI_PM1_STATUS_PRESERVED_BITS,
+ read_value);
+
+ /* Now we can write the data */
+
status =
acpi_hw_low_level_write(16, value,
&acpi_gbl_FADT->xpm1a_evt_blk);
case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */
+ /*
+ * Perform a read first to preserve certain bits (per ACPI spec)
+ */
+ status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
+ ACPI_REGISTER_PM1_CONTROL,
+ &read_value);
+ if (ACPI_FAILURE(status)) {
+ goto unlock_and_exit;
+ }
+
+ /* Insert the bits to be preserved */
+
+ ACPI_INSERT_BITS(value, ACPI_PM1_CONTROL_PRESERVED_BITS,
+ read_value);
+
+ /* Now we can write the data */
+
status =
acpi_hw_low_level_write(16, value,
&acpi_gbl_FADT->xpm1a_cnt_blk);
unlock_and_exit:
if (ACPI_MTX_LOCK == use_lock) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
}
return_ACPI_STATUS(status);
u64 address;
acpi_status status;
- ACPI_FUNCTION_NAME("hw_low_level_read");
+ ACPI_FUNCTION_NAME(hw_low_level_read);
/*
* Must have a valid pointer to a GAS structure, and
return (AE_OK);
}
- /* Get a local copy of the address. Handles possible alignment issues */
+ /* Get a local copy of the address. Handles possible alignment issues */
ACPI_MOVE_64_TO_64(&address, ®->address);
if (!address) {
u64 address;
acpi_status status;
- ACPI_FUNCTION_NAME("hw_low_level_write");
+ ACPI_FUNCTION_NAME(hw_low_level_write);
/*
* Must have a valid pointer to a GAS structure, and
return (AE_OK);
}
- /* Get a local copy of the address. Handles possible alignment issues */
+ /* Get a local copy of the address. Handles possible alignment issues */
ACPI_MOVE_64_TO_64(&address, ®->address);
if (!address) {
projects / linux-drm-fsl-dcu.git / blobdiff