diff options
Diffstat (limited to 'drivers/acpi/hardware/hwxface.c')
| -rw-r--r-- | drivers/acpi/hardware/hwxface.c | 595 |
1 files changed, 0 insertions, 595 deletions
diff --git a/drivers/acpi/hardware/hwxface.c b/drivers/acpi/hardware/hwxface.c deleted file mode 100644 index 156c946e7..000000000 --- a/drivers/acpi/hardware/hwxface.c +++ /dev/null @@ -1,595 +0,0 @@ - -/****************************************************************************** - * - * Name: hwxface.c - Hardware access external interfaces - * $Revision: 36 $ - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 R. Byron Moore - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "acpi.h" -#include "acnamesp.h" -#include "achware.h" - -#define _COMPONENT HARDWARE - MODULE_NAME ("hwxface") - - -/****************************************************************************** - * - * Hardware globals - * - ******************************************************************************/ - - -ACPI_C_STATE_HANDLER acpi_hw_cx_handlers[MAX_CX_STATES] = - {NULL, acpi_hw_enter_c1, NULL, NULL}; - -u32 acpi_hw_active_cx_state = 1; - - -/**************************************************************************** - * - * FUNCTION: Acpi_get_processor_throttling_info - * - * PARAMETERS: Processor_handle - handle for the cpu to get info about - * User_buffer - caller supplied buffer - * - * RETURN: Status of function - * - * DESCRIPTION: Get throttling capabilities for the processor, this routine - * builds the data directly into the callers buffer - * - ****************************************************************************/ - -ACPI_STATUS -acpi_get_processor_throttling_info ( - ACPI_HANDLE processor_handle, - ACPI_BUFFER *user_buffer) -{ - NATIVE_UINT percent_step; - NATIVE_UINT next_percent; - NATIVE_UINT num_throttle_states; - NATIVE_UINT buffer_space_needed; - NATIVE_UINT i; - u8 duty_width; - ACPI_NAMESPACE_NODE *cpu_node; - ACPI_OPERAND_OBJECT *cpu_obj; - ACPI_CPU_THROTTLING_STATE *state_ptr; - - - /* - * Have to at least have a buffer to return info in - */ - if (!user_buffer) { - return(AE_BAD_PARAMETER); - } - - /* - * Convert and validate the device handle - */ - - cpu_node = acpi_ns_convert_handle_to_entry (processor_handle); - if (!cpu_node) { - return (AE_BAD_PARAMETER); - } - - /* - * Check for an existing internal object - */ - - cpu_obj = acpi_ns_get_attached_object ((ACPI_HANDLE) cpu_node); - if (!cpu_obj) { - return (AE_NOT_FOUND); - } - - /* - * (Duty Width on IA-64 is zero) - */ - duty_width = acpi_gbl_FADT->duty_width; - - /* - * P0 must always have a P_BLK all others may be null - * in either case, we can't throttle a processor that has no P_BLK - * - * Also if no Duty width, one state and it is 100% - * - */ - if (!cpu_obj->processor.length || !duty_width || - (ACPI_UINT16_MAX < cpu_obj->processor.address)) - { - /* - * Acpi_even though we can't throttle, we still have one state (100%) - */ - num_throttle_states = 1; - } - - else { - num_throttle_states = (int) acpi_hw_local_pow (2,duty_width); - } - - buffer_space_needed = num_throttle_states * sizeof (ACPI_CPU_THROTTLING_STATE); - - if ((user_buffer->length < buffer_space_needed) || !user_buffer->pointer) { - user_buffer->length = buffer_space_needed; - return (AE_BUFFER_OVERFLOW); - } - - user_buffer->length = buffer_space_needed; - state_ptr = (ACPI_CPU_THROTTLING_STATE *) user_buffer->pointer; - percent_step = 1000 / num_throttle_states; - - /* - * Build each entry in the buffer. Note that we're using the value - * 1000 and dividing each state by 10 to better avoid round-off - * accumulation. Also note that the throttling STATES are ordered - * sequentially from 100% (state 0) on down (e.g. 87.5% = state 1), - * which is exactly opposite from duty cycle values (12.5% = state 1). - */ - for (i = 0, next_percent = 1000; i < num_throttle_states; i++) { - state_ptr[i].state_number = i; - state_ptr[i].percent_of_clock = next_percent / 10; - next_percent -= percent_step; - } - - return(AE_OK); -} - - -/**************************************************************************** - * - * FUNCTION: Acpi_get_processor_throttling_state - * - * PARAMETERS: Processor_handle - handle for the cpu to throttle - * Throttle_state - throttling state to enter - * - * RETURN: Status of function - * - * DESCRIPTION: Get current hardware throttling state - * - ****************************************************************************/ - -ACPI_STATUS -acpi_get_processor_throttling_state ( - ACPI_HANDLE processor_handle, - u32 *throttle_state) -{ - ACPI_NAMESPACE_NODE *cpu_node; - ACPI_OPERAND_OBJECT *cpu_obj; - u32 num_throttle_states; - u32 duty_cycle; - u8 duty_offset; - u8 duty_width; - - - /* Convert and validate the device handle */ - - cpu_node = acpi_ns_convert_handle_to_entry (processor_handle); - if (!cpu_node || !throttle_state) { - return (AE_BAD_PARAMETER); - } - - /* Check for an existing internal object */ - - cpu_obj = acpi_ns_get_attached_object ((ACPI_HANDLE) cpu_node); - if (!cpu_obj) { - return (AE_NOT_FOUND); - } - - /* - * No Duty fields in IA64 tables - */ - duty_offset = acpi_gbl_FADT->duty_offset; - duty_width = acpi_gbl_FADT->duty_width; - - /* - * Must have a valid P_BLK P0 must have a P_BLK all others may be null - * in either case, we can't thottle a processor that has no P_BLK - * that means we are in the only supported state (0 - 100%) - * - * also, if Duty_width is zero there are no additional states - */ - if (!cpu_obj->processor.length || !duty_width || - (ACPI_UINT16_MAX < cpu_obj->processor.address)) - { - *throttle_state = 0; - return(AE_OK); - } - - num_throttle_states = (u32) acpi_hw_local_pow (2,duty_width); - - /* - * Get the current duty cycle value. - */ - duty_cycle = acpi_hw_get_duty_cycle (duty_offset, - cpu_obj->processor.address, - num_throttle_states); - - /* - * Convert duty cycle to throttling state (invert). - */ - if (duty_cycle == 0) { - *throttle_state = 0; - } - - else { - *throttle_state = num_throttle_states - duty_cycle; - } - - return(AE_OK); -} - - -/**************************************************************************** - * - * FUNCTION: Acpi_set_processor_throttling_state - * - * PARAMETERS: Processor_handle - handle for the cpu to throttle - * Throttle_state - throttling state to enter - * - * RETURN: Status of function - * - * DESCRIPTION: Set hardware into requested throttling state, the handle - * passed in must have a valid P_BLK - * - ****************************************************************************/ - -ACPI_STATUS -acpi_set_processor_throttling_state ( - ACPI_HANDLE processor_handle, - u32 throttle_state) -{ - ACPI_NAMESPACE_NODE *cpu_node; - ACPI_OPERAND_OBJECT *cpu_obj; - u32 num_throttle_states = 0; - u8 duty_offset; - u8 duty_width; - u32 duty_cycle = 0; - - - /* Convert and validate the device handle */ - - cpu_node = acpi_ns_convert_handle_to_entry (processor_handle); - if (!cpu_node) { - return (AE_BAD_PARAMETER); - } - - /* Check for an existing internal object */ - - cpu_obj = acpi_ns_get_attached_object ((ACPI_HANDLE) cpu_node); - if (!cpu_obj) { - return (AE_NOT_FOUND); - } - - /* - * No Duty fields in IA64 tables - */ - duty_offset = acpi_gbl_FADT->duty_offset; - duty_width = acpi_gbl_FADT->duty_width; - - /* - * Must have a valid P_BLK P0 must have a P_BLK all others may be null - * in either case, we can't thottle a processor that has no P_BLK - * that means we are in the only supported state (0 - 100%) - * - * also, if Duty_width is zero there are no additional states - */ - if (!cpu_obj->processor.length || !duty_width || - (ACPI_UINT16_MAX < cpu_obj->processor.address)) - { - /* - * If caller wants to set the state to the only state we handle - * we're done. - */ - if (throttle_state == 0) { - return (AE_OK); - } - - /* - * Can't set this state - */ - return (AE_SUPPORT); - } - - num_throttle_states = (u32) acpi_hw_local_pow (2,duty_width); - - /* - * Convert throttling state to duty cycle (invert). - */ - if (throttle_state > 0) { - duty_cycle = num_throttle_states - throttle_state; - } - - /* - * Turn off throttling (don't muck with the h/w while throttling). - */ - acpi_hw_disable_throttling (cpu_obj->processor.address); - - /* - * Program the throttling state. - */ - acpi_hw_program_duty_cycle (duty_offset, duty_cycle, - cpu_obj->processor.address, num_throttle_states); - - /* - * Only enable throttling for non-zero states (0 - 100%) - */ - if (throttle_state) { - acpi_hw_enable_throttling (cpu_obj->processor.address); - } - - return(AE_OK); -} - - -/**************************************************************************** - * - * FUNCTION: Acpi_get_processor_cx_info - * - * PARAMETERS: Processor_handle - handle for the cpu return info about - * User_buffer - caller supplied buffer - * - * RETURN: Status of function - * - * DESCRIPTION: Get Cx state latencies, this routine - * builds the data directly into the callers buffer - * - * - ****************************************************************************/ - -ACPI_STATUS -acpi_get_processor_cx_info ( - ACPI_HANDLE processor_handle, - ACPI_BUFFER *user_buffer) -{ - ACPI_STATUS status = AE_OK; - u32 cx_state_latencies[4] = {0, 0, 0, 0}; - NATIVE_UINT buffer_space_needed = 0; - ACPI_CX_STATE *state_ptr = NULL; - NATIVE_UINT i = 0; - - - /* - * Have to at least have a buffer to return info in - */ - if (!user_buffer) { - return (AE_BAD_PARAMETER); - } - - status = acpi_hw_get_cx_info (cx_state_latencies); - if (ACPI_FAILURE (status)) { - return (status); - } - - buffer_space_needed = 4 * sizeof (ACPI_CX_STATE); - - if ((user_buffer->length < buffer_space_needed) || !user_buffer->pointer) { - user_buffer->length = buffer_space_needed; - return (AE_BUFFER_OVERFLOW); - } - - user_buffer->length = buffer_space_needed; - - state_ptr = (ACPI_CX_STATE *) user_buffer->pointer; - - for (i = 0; i < 4; i++) { - state_ptr[i].state_number = i; - state_ptr[i].latency = cx_state_latencies[i]; - } - - return (AE_OK); -} - - -/**************************************************************************** - * - * FUNCTION: Acpi_set_processor_sleep_state - * - * PARAMETERS: Processor_handle - handle for the cpu return info about - * Cx_state - the Cx sleeping state (C1-C3) to make - * 'active' - * - * RETURN: Status of function - * - * DESCRIPTION: Sets which Cx state will be used during calls to - * Acpi_processor_sleep () - * - ****************************************************************************/ - -ACPI_STATUS -acpi_set_processor_sleep_state ( - ACPI_HANDLE processor_handle, - u32 cx_state) -{ - ACPI_STATUS status; - - - status = acpi_hw_set_cx (cx_state); - - return (status); -} - - -/**************************************************************************** - * - * FUNCTION: Acpi_processor_sleep - * - * PARAMETERS: Processor_handle - handle for the cpu to put to sleep (Cx) - * Time_sleeping - time (in microseconds) elapsed while - * sleeping - * - * RETURN: Status of function - * - * DESCRIPTION: Puts the processor into the currently active sleep state (Cx) - * - ****************************************************************************/ - -ACPI_STATUS -acpi_processor_sleep ( - ACPI_HANDLE processor_handle, - u32 *pm_timer_ticks) -{ - ACPI_NAMESPACE_NODE *cpu_node = NULL; - ACPI_OPERAND_OBJECT *cpu_obj = NULL; - ACPI_IO_ADDRESS address = 0; - - - /* - * Convert Processor_handle to Pblk_addres... - */ - - /* Convert and validate the device handle */ - - cpu_node = acpi_ns_convert_handle_to_entry (processor_handle); - if (!cpu_node) { - return (AE_BAD_PARAMETER); - } - - /* Check for an existing internal object */ - - cpu_obj = acpi_ns_get_attached_object ((ACPI_HANDLE) cpu_node); - if (!cpu_obj) { - return (AE_NOT_FOUND); - } - - /* Get the processor register block (P_BLK) address */ - - address = cpu_obj->processor.address; - if (!cpu_obj->processor.length) { - /* Ensure a NULL addresss (note that P_BLK isn't required for C1) */ - - address = 0; - } - - /* - * Enter the currently active Cx sleep state. - */ - return (acpi_hw_enter_cx (address, pm_timer_ticks)); -} - - -/****************************************************************************** - * - * FUNCTION: Acpi_get_timer - * - * PARAMETERS: none - * - * RETURN: Current value of the ACPI PMT (timer) - * - * DESCRIPTION: Obtains current value of ACPI PMT - * - ******************************************************************************/ - -ACPI_STATUS -acpi_get_timer ( - u32 *out_ticks) -{ - - if (!out_ticks) { - return (AE_BAD_PARAMETER); - } - - *out_ticks = acpi_hw_pmt_ticks (); - - return (AE_OK); -} - - -/****************************************************************************** - * - * FUNCTION: Acpi_set_firmware_waking_vector - * - * PARAMETERS: Physical_address - Physical address of ACPI real mode - * entry point. - * - * RETURN: AE_OK or AE_ERROR - * - * DESCRIPTION: Access function for d_firmware_waking_vector field in FACS - * - ******************************************************************************/ - -ACPI_STATUS -acpi_set_firmware_waking_vector ( - ACPI_PHYSICAL_ADDRESS physical_address) -{ - - - /* Make sure that we have an FACS */ - - if (!acpi_gbl_FACS) { - return (AE_NO_ACPI_TABLES); - } - - /* Set the vector */ - - if (acpi_gbl_FACS->vector_width == 32) { - * (u32 *) acpi_gbl_FACS->firmware_waking_vector = (u32) physical_address; - } - else { - *acpi_gbl_FACS->firmware_waking_vector = physical_address; - } - - return (AE_OK); -} - - -/****************************************************************************** - * - * FUNCTION: Acpi_get_firmware_waking_vector - * - * PARAMETERS: *Physical_address - Output buffer where contents of - * the Firmware_waking_vector field of - * the FACS will be stored. - * - * RETURN: Status - * - * DESCRIPTION: Access function for d_firmware_waking_vector field in FACS - * - ******************************************************************************/ - -ACPI_STATUS -acpi_get_firmware_waking_vector ( - ACPI_PHYSICAL_ADDRESS *physical_address) -{ - - - if (!physical_address) { - return (AE_BAD_PARAMETER); - } - - /* Make sure that we have an FACS */ - - if (!acpi_gbl_FACS) { - return (AE_NO_ACPI_TABLES); - } - - /* Get the vector */ - - if (acpi_gbl_FACS->vector_width == 32) { - *physical_address = * (u32 *) acpi_gbl_FACS->firmware_waking_vector; - } - else { - *physical_address = *acpi_gbl_FACS->firmware_waking_vector; - } - - return (AE_OK); -} - - |