115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
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/*
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* Copyright (c) 2008-2010 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#include "sdio_cmdprop.h"
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#include "sdio_types.h"
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enum CommandRegFieldOffsets
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{
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kResponseTypeOffset = 0,
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kCmdCRCCheckEnabledOffset = 3,
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kCmdIndexCheckEnabledOffset = 4,
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kDataPresentSelectOffset = 5,
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kCommandTypeOffset = 6,
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kCommandIndexOffset = 8,
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};
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enum CommandRegFieldMasks
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{
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kResponseTypeSelectMask = (0x3 << kResponseTypeOffset),
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kCmdCRCCheckEnabled = (1 << kCmdCRCCheckEnabledOffset),
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kCmdIndexCheckEnabled = (1 << kCmdIndexCheckEnabledOffset),
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kDataPresentSelect = (1 << kDataPresentSelectOffset),
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kCommandTypeMask = (0x3 << kCommandTypeOffset),
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kCommandIndexMask = (0x3F << kCommandIndexOffset),
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};
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enum CommandRegCommandType
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{
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kSDIOCommandNormal = (0x0 << kCommandTypeOffset),
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kSDIOCommandSuspend = (0x1 << kCommandTypeOffset),
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kSDIOCommandResume = (0x2 << kCommandTypeOffset),
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kSDIOCommandAbort = (0x3 << kCommandTypeOffset),
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};
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enum CommandRegResponseTypeSelect
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{
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kNoResponse = (0x0 << kResponseTypeOffset),
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kResponseLength136 = (0x1 << kResponseTypeOffset),
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kResponseLength48 = (0x2 << kResponseTypeOffset),
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kResponseLength48CheckBusy = (0x3 << kResponseTypeOffset),
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};
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bool
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sdio_isDataPresent(UInt16 cmdIndex)
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{
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// TODO: Support other data commands
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return kSDIOCmd53_IORWExtended == cmdIndex;
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}
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static bool
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sdio_shouldCheckIndex(UInt16 cmdIndex)
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{
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return cmdIndex != kSDIOCmd5_IOSendOpCond;
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}
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static bool
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sdio_shouldCheckCRC(UInt16 cmdIndex)
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{
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return cmdIndex != kSDIOCmd5_IOSendOpCond;
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}
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static enum CommandRegResponseTypeSelect
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sdio_getResponseType(UInt16 cmdIndex)
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{
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// TODO: Support other response types
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return kResponseLength48;
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}
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UInt16 sdio_generateCommand(UInt16 cmdIndex)
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{
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UInt16 cmd = 0;
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// Command Index
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cmd |= (cmdIndex << kCommandIndexOffset) & kCommandIndexMask;
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// Command Type
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// TODO: Support abort & suspend / resume commands
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cmd |= kSDIOCommandNormal;
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// Data present select
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if(sdio_isDataPresent(cmdIndex)) {
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cmd |= kDataPresentSelect;
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}
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// Command Index Check
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if(sdio_shouldCheckIndex(cmdIndex)) {
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cmd |= kCmdIndexCheckEnabled;
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}
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// Command CRC Check
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if(sdio_shouldCheckCRC(cmdIndex)) {
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cmd |= kCmdCRCCheckEnabled;
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}
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// Response type select
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cmd |= sdio_getResponseType(cmdIndex);
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return cmd;
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}
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