diff options
Diffstat (limited to 'drivers/acpi/resources/rsio.c')
| -rw-r--r-- | drivers/acpi/resources/rsio.c | 545 |
1 files changed, 545 insertions, 0 deletions
diff --git a/drivers/acpi/resources/rsio.c b/drivers/acpi/resources/rsio.c new file mode 100644 index 000000000000..972c746d37e4 --- /dev/null +++ b/drivers/acpi/resources/rsio.c @@ -0,0 +1,545 @@ +/******************************************************************************* + * + * Module Name: rsio - IO and DMA resource descriptors + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + + +#include <acpi/acpi.h> +#include <acpi/acresrc.h> + +#define _COMPONENT ACPI_RESOURCES + ACPI_MODULE_NAME ("rsio") + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_io_resource + * + * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte + * stream + * bytes_consumed - Pointer to where the number of bytes + * consumed the byte_stream_buffer is + * returned + * output_buffer - Pointer to the return data buffer + * structure_size - Pointer to where the number of bytes + * in the return data struct is returned + * + * RETURN: Status + * + * DESCRIPTION: Take the resource byte stream and fill out the appropriate + * structure pointed to by the output_buffer. Return the + * number of bytes consumed from the byte stream. + * + ******************************************************************************/ + +acpi_status +acpi_rs_io_resource ( + u8 *byte_stream_buffer, + acpi_size *bytes_consumed, + u8 **output_buffer, + acpi_size *structure_size) +{ + u8 *buffer = byte_stream_buffer; + struct acpi_resource *output_struct = (void *) *output_buffer; + u16 temp16 = 0; + u8 temp8 = 0; + acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_io); + + + ACPI_FUNCTION_TRACE ("rs_io_resource"); + + + /* + * The number of bytes consumed are Constant + */ + *bytes_consumed = 8; + + output_struct->id = ACPI_RSTYPE_IO; + + /* + * Check Decode + */ + buffer += 1; + temp8 = *buffer; + + output_struct->data.io.io_decode = temp8 & 0x01; + + /* + * Check min_base Address + */ + buffer += 1; + ACPI_MOVE_16_TO_16 (&temp16, buffer); + + output_struct->data.io.min_base_address = temp16; + + /* + * Check max_base Address + */ + buffer += 2; + ACPI_MOVE_16_TO_16 (&temp16, buffer); + + output_struct->data.io.max_base_address = temp16; + + /* + * Check Base alignment + */ + buffer += 2; + temp8 = *buffer; + + output_struct->data.io.alignment = temp8; + + /* + * Check range_length + */ + buffer += 1; + temp8 = *buffer; + + output_struct->data.io.range_length = temp8; + + /* + * Set the Length parameter + */ + output_struct->length = (u32) struct_size; + + /* + * Return the final size of the structure + */ + *structure_size = struct_size; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_fixed_io_resource + * + * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte + * stream + * bytes_consumed - Pointer to where the number of bytes + * consumed the byte_stream_buffer is + * returned + * output_buffer - Pointer to the return data buffer + * structure_size - Pointer to where the number of bytes + * in the return data struct is returned + * + * RETURN: Status + * + * DESCRIPTION: Take the resource byte stream and fill out the appropriate + * structure pointed to by the output_buffer. Return the + * number of bytes consumed from the byte stream. + * + ******************************************************************************/ + +acpi_status +acpi_rs_fixed_io_resource ( + u8 *byte_stream_buffer, + acpi_size *bytes_consumed, + u8 **output_buffer, + acpi_size *structure_size) +{ + u8 *buffer = byte_stream_buffer; + struct acpi_resource *output_struct = (void *) *output_buffer; + u16 temp16 = 0; + u8 temp8 = 0; + acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_fixed_io); + + + ACPI_FUNCTION_TRACE ("rs_fixed_io_resource"); + + + /* + * The number of bytes consumed are Constant + */ + *bytes_consumed = 4; + + output_struct->id = ACPI_RSTYPE_FIXED_IO; + + /* + * Check Range Base Address + */ + buffer += 1; + ACPI_MOVE_16_TO_16 (&temp16, buffer); + + output_struct->data.fixed_io.base_address = temp16; + + /* + * Check range_length + */ + buffer += 2; + temp8 = *buffer; + + output_struct->data.fixed_io.range_length = temp8; + + /* + * Set the Length parameter + */ + output_struct->length = (u32) struct_size; + + /* + * Return the final size of the structure + */ + *structure_size = struct_size; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_io_stream + * + * PARAMETERS: linked_list - Pointer to the resource linked list + * output_buffer - Pointer to the user's return buffer + * bytes_consumed - Pointer to where the number of bytes + * used in the output_buffer is returned + * + * RETURN: Status + * + * DESCRIPTION: Take the linked list resource structure and fills in the + * the appropriate bytes in a byte stream + * + ******************************************************************************/ + +acpi_status +acpi_rs_io_stream ( + struct acpi_resource *linked_list, + u8 **output_buffer, + acpi_size *bytes_consumed) +{ + u8 *buffer = *output_buffer; + u16 temp16 = 0; + u8 temp8 = 0; + + + ACPI_FUNCTION_TRACE ("rs_io_stream"); + + + /* + * The descriptor field is static + */ + *buffer = 0x47; + buffer += 1; + + /* + * Io Information Byte + */ + temp8 = (u8) (linked_list->data.io.io_decode & 0x01); + + *buffer = temp8; + buffer += 1; + + /* + * Set the Range minimum base address + */ + temp16 = (u16) linked_list->data.io.min_base_address; + + ACPI_MOVE_16_TO_16 (buffer, &temp16); + buffer += 2; + + /* + * Set the Range maximum base address + */ + temp16 = (u16) linked_list->data.io.max_base_address; + + ACPI_MOVE_16_TO_16 (buffer, &temp16); + buffer += 2; + + /* + * Set the base alignment + */ + temp8 = (u8) linked_list->data.io.alignment; + + *buffer = temp8; + buffer += 1; + + /* + * Set the range length + */ + temp8 = (u8) linked_list->data.io.range_length; + + *buffer = temp8; + buffer += 1; + + /* + * Return the number of bytes consumed in this operation + */ + *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_fixed_io_stream + * + * PARAMETERS: linked_list - Pointer to the resource linked list + * output_buffer - Pointer to the user's return buffer + * bytes_consumed - Pointer to where the number of bytes + * used in the output_buffer is returned + * + * RETURN: Status + * + * DESCRIPTION: Take the linked list resource structure and fills in the + * the appropriate bytes in a byte stream + * + ******************************************************************************/ + +acpi_status +acpi_rs_fixed_io_stream ( + struct acpi_resource *linked_list, + u8 **output_buffer, + acpi_size *bytes_consumed) +{ + u8 *buffer = *output_buffer; + u16 temp16 = 0; + u8 temp8 = 0; + + + ACPI_FUNCTION_TRACE ("rs_fixed_io_stream"); + + + /* + * The descriptor field is static + */ + *buffer = 0x4B; + + buffer += 1; + + /* + * Set the Range base address + */ + temp16 = (u16) linked_list->data.fixed_io.base_address; + + ACPI_MOVE_16_TO_16 (buffer, &temp16); + buffer += 2; + + /* + * Set the range length + */ + temp8 = (u8) linked_list->data.fixed_io.range_length; + + *buffer = temp8; + buffer += 1; + + /* + * Return the number of bytes consumed in this operation + */ + *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_dma_resource + * + * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte + * stream + * bytes_consumed - Pointer to where the number of bytes + * consumed the byte_stream_buffer is + * returned + * output_buffer - Pointer to the return data buffer + * structure_size - Pointer to where the number of bytes + * in the return data struct is returned + * + * RETURN: Status + * + * DESCRIPTION: Take the resource byte stream and fill out the appropriate + * structure pointed to by the output_buffer. Return the + * number of bytes consumed from the byte stream. + * + ******************************************************************************/ + +acpi_status +acpi_rs_dma_resource ( + u8 *byte_stream_buffer, + acpi_size *bytes_consumed, + u8 **output_buffer, + acpi_size *structure_size) +{ + u8 *buffer = byte_stream_buffer; + struct acpi_resource *output_struct = (void *) *output_buffer; + u8 temp8 = 0; + u8 index; + u8 i; + acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_dma); + + + ACPI_FUNCTION_TRACE ("rs_dma_resource"); + + + /* + * The number of bytes consumed are Constant + */ + *bytes_consumed = 3; + output_struct->id = ACPI_RSTYPE_DMA; + + /* + * Point to the 8-bits of Byte 1 + */ + buffer += 1; + temp8 = *buffer; + + /* Decode the DMA channel bits */ + + for (i = 0, index = 0; index < 8; index++) { + if ((temp8 >> index) & 0x01) { + output_struct->data.dma.channels[i] = index; + i++; + } + } + + /* Zero DMA channels is valid */ + + output_struct->data.dma.number_of_channels = i; + if (i > 0) { + /* + * Calculate the structure size based upon the number of interrupts + */ + struct_size += ((acpi_size) i - 1) * 4; + } + + /* + * Point to Byte 2 + */ + buffer += 1; + temp8 = *buffer; + + /* + * Check for transfer preference (Bits[1:0]) + */ + output_struct->data.dma.transfer = temp8 & 0x03; + + if (0x03 == output_struct->data.dma.transfer) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid DMA.Transfer preference (3)\n")); + return_ACPI_STATUS (AE_BAD_DATA); + } + + /* + * Get bus master preference (Bit[2]) + */ + output_struct->data.dma.bus_master = (temp8 >> 2) & 0x01; + + /* + * Get channel speed support (Bits[6:5]) + */ + output_struct->data.dma.type = (temp8 >> 5) & 0x03; + + /* + * Set the Length parameter + */ + output_struct->length = (u32) struct_size; + + /* + * Return the final size of the structure + */ + *structure_size = struct_size; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_rs_dma_stream + * + * PARAMETERS: linked_list - Pointer to the resource linked list + * output_buffer - Pointer to the user's return buffer + * bytes_consumed - Pointer to where the number of bytes + * used in the output_buffer is returned + * + * RETURN: Status + * + * DESCRIPTION: Take the linked list resource structure and fills in the + * the appropriate bytes in a byte stream + * + ******************************************************************************/ + +acpi_status +acpi_rs_dma_stream ( + struct acpi_resource *linked_list, + u8 **output_buffer, + acpi_size *bytes_consumed) +{ + u8 *buffer = *output_buffer; + u16 temp16 = 0; + u8 temp8 = 0; + u8 index; + + + ACPI_FUNCTION_TRACE ("rs_dma_stream"); + + + /* + * The descriptor field is static + */ + *buffer = 0x2A; + buffer += 1; + temp8 = 0; + + /* + * Loop through all of the Channels and set the mask bits + */ + for (index = 0; + index < linked_list->data.dma.number_of_channels; + index++) { + temp16 = (u16) linked_list->data.dma.channels[index]; + temp8 |= 0x1 << temp16; + } + + *buffer = temp8; + buffer += 1; + + /* + * Set the DMA Info + */ + temp8 = (u8) ((linked_list->data.dma.type & 0x03) << 5); + temp8 |= ((linked_list->data.dma.bus_master & 0x01) << 2); + temp8 |= (linked_list->data.dma.transfer & 0x03); + + *buffer = temp8; + buffer += 1; + + /* + * Return the number of bytes consumed in this operation + */ + *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); + return_ACPI_STATUS (AE_OK); +} + |