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1 // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <kernel/kernel.h> |
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17 #include <upd35001_timer.h> |
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18 |
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19 #include "k32bm.h" |
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20 |
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21 class DBMNE1Device : public DPhysicalDevice |
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22 { |
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23 public: |
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24 DBMNE1Device(); |
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25 virtual TInt Install(); |
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26 virtual void GetCaps(TDes8& aDes) const; |
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27 virtual TInt Create(DBase*& aChannel, TInt aUnit, const TDesC8* anInfo, const TVersion& aVer); |
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28 virtual TInt Validate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer); |
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29 }; |
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30 |
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31 class DBMNE1Channel : public DBMPChannel |
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32 { |
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33 public: |
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34 DBMNE1Channel(); |
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35 ~DBMNE1Channel(); |
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36 virtual TBMTicks TimerPeriod(); |
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37 virtual TBMTicks TimerStamp(); |
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38 virtual TBMNs TimerTicksToNs(TBMTicks); |
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39 virtual TBMTicks TimerNsToTicks(TBMNs); |
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40 virtual TInt BindInterrupt(MBMIsr*); |
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41 virtual TInt BindInterrupt(MBMInterruptLatencyIsr*); |
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42 virtual void RequestInterrupt(); |
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43 virtual void CancelInterrupt(); |
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44 |
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45 private: |
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46 static const TBMTicks KBMNE1Period = (((TBMTicks) 1) << 32); |
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47 |
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48 static void Isr(TAny*); |
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49 |
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50 MBMIsr* iIsr; |
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51 MBMInterruptLatencyIsr* iInterruptLatencyIsr; |
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52 TUint iPrescale; |
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53 TUint iNsPerTick; |
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54 NTimer iTimer; |
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55 volatile TUint iStartCount; |
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56 volatile TUint iRunCount; |
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57 volatile TUint iCancelCount; |
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58 }; |
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59 |
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60 |
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61 DECLARE_STANDARD_PDD() |
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62 // |
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63 // Create a new device |
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64 // |
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65 { |
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66 __ASSERT_CRITICAL; |
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67 return new DBMNE1Device; |
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68 } |
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69 |
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70 DBMNE1Device::DBMNE1Device() |
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71 // |
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72 // Constructor |
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73 // |
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74 { |
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75 //iUnitsMask=0; |
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76 iVersion = TVersion(1,0,1); |
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77 } |
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78 |
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79 TInt DBMNE1Device::Install() |
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80 // |
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81 // Install the device driver. |
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82 // |
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83 { |
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84 TInt r = SetName(&KBMPdName); |
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85 return r; |
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86 } |
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87 |
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88 void DBMNE1Device::GetCaps(TDes8& aDes) const |
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89 // |
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90 // Return the Comm capabilities. |
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91 // |
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92 { |
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93 } |
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94 |
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95 TInt DBMNE1Device::Create(DBase*& aChannel, TInt /*aUnit*/, const TDesC8* /*aInfo*/, const TVersion& /*aVer*/) |
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96 // |
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97 // Create a channel on the device. |
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98 // |
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99 { |
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100 __ASSERT_CRITICAL; |
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101 aChannel = new DBMNE1Channel; |
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102 return aChannel?KErrNone:KErrNoMemory; |
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103 } |
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104 |
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105 TInt DBMNE1Device::Validate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& aVer) |
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106 { |
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107 if (!Kern::QueryVersionSupported(iVersion,aVer)) |
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108 { |
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109 return KErrNotSupported; |
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110 } |
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111 return KErrNone; |
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112 } |
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113 |
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114 DBMNE1Channel::DBMNE1Channel() |
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115 : iTimer(&Isr, this) |
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116 { |
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117 // iIsr = NULL; |
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118 // iInterruptLatencyIsr = NULL; |
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119 NETimer& T2 = NETimer::Timer(2); |
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120 iPrescale = __e32_find_ms1_32(T2.iPrescaler & 0x3f); |
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121 iNsPerTick = 15u << iPrescale; |
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122 } |
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123 |
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124 DBMNE1Channel::~DBMNE1Channel() |
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125 { |
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126 CancelInterrupt(); |
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127 } |
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128 |
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129 TBMTicks DBMNE1Channel::TimerPeriod() |
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130 { |
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131 return KBMNE1Period; |
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132 } |
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133 |
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134 TBMTicks DBMNE1Channel::TimerStamp() |
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135 { |
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136 return NETimer::Timer(2).iTimerCount; |
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137 } |
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138 |
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139 TBMNs DBMNE1Channel::TimerTicksToNs(TBMTicks ticks) |
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140 { |
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141 return ticks * (TBMTicks)iNsPerTick; |
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142 } |
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143 |
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144 TBMTicks DBMNE1Channel::TimerNsToTicks(TBMNs ns) |
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145 { |
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146 return ns / (TBMTicks)iNsPerTick; |
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147 } |
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148 |
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149 void DBMNE1Channel::Isr(TAny* ptr) |
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150 { |
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151 DBMNE1Channel* mCh = (DBMNE1Channel*) ptr; |
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152 BM_ASSERT(mCh->iIsr || mCh->iInterruptLatencyIsr); |
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153 if (mCh->iIsr) |
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154 { |
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155 mCh->iIsr->Isr(NETimer::Timer(2).iTimerCount); |
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156 } |
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157 else |
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158 { |
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159 TUint x = NETimer::Timer(0).iTimerCount; |
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160 x = (x + (1u<<mCh->iPrescale) - 1) >> mCh->iPrescale; |
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161 mCh->iInterruptLatencyIsr->InterruptLatencyIsr(x); |
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162 } |
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163 __e32_atomic_add_ord32(&mCh->iRunCount, 1); |
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164 } |
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165 |
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166 TInt DBMNE1Channel::BindInterrupt(MBMIsr* aIsr) |
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167 { |
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168 BM_ASSERT(!iIsr); |
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169 BM_ASSERT(!iInterruptLatencyIsr); |
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170 iIsr = aIsr; |
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171 return KErrNone; |
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172 } |
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173 |
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174 TInt DBMNE1Channel::BindInterrupt(MBMInterruptLatencyIsr* aIsr) |
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175 { |
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176 BM_ASSERT(!iIsr); |
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177 BM_ASSERT(!iInterruptLatencyIsr); |
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178 iInterruptLatencyIsr = aIsr; |
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179 return KErrNone; |
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180 } |
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181 |
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182 |
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183 void DBMNE1Channel::RequestInterrupt() |
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184 { |
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185 BM_ASSERT(iIsr || iInterruptLatencyIsr); |
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186 if (iTimer.OneShot(1)==KErrNone) |
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187 __e32_atomic_add_ord32(&iStartCount, 1); |
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188 } |
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189 |
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190 void DBMNE1Channel::CancelInterrupt() |
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191 { |
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192 if (iTimer.Cancel()) |
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193 __e32_atomic_add_ord32(&iCancelCount, 1); |
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194 while (iStartCount != iCancelCount + iRunCount) |
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195 {} |
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196 } |
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197 |