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14 * Copyright (c) 2005 The Regents of The University of Michigan
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40 * Authors: William Wang
45 * Implementiation of a PL050 KMI
48 #ifndef __DEV_ARM_PL050_HH__
49 #define __DEV_ARM_PL050_HH__
53 #include "base/vnc/vncinput.hh"
54 #include "dev/arm/amba_device.hh"
55 #include "params/Pl050.hh"
57 class Pl050 : public AmbaIntDevice, public VncKeyboard, public VncMouse
60 static const int kmiCr = 0x000;
61 static const int kmiStat = 0x004;
62 static const int kmiData = 0x008;
63 static const int kmiClkDiv = 0x00C;
64 static const int kmiISR = 0x010;
67 Bitfield<0> force_clock_low;
68 Bitfield<1> force_data_low;
70 Bitfield<3> txint_enable;
71 Bitfield<4> rxint_enable;
73 EndBitUnion(ControlReg)
79 /** KMI status register */
88 EndBitUnion(StatusReg)
92 /** clock divisor register
93 * This register is just kept around to satisfy reads after driver does
94 * writes. The divsor does nothing, as we're not actually signaling ps2
95 * serial commands to anything.
99 BitUnion8(InterruptReg)
102 EndBitUnion(InterruptReg)
104 /** interrupt status register. */
105 InterruptReg interrupts;
107 /** raw interrupt register (unmasked) */
108 InterruptReg rawInterrupts;
110 /** If the controller should ignore the next data byte and acknowledge it.
111 * The driver is attempting to setup some feature we don't care about
115 /** is the shift key currently down */
118 /** The vnc server we're connected to (if any) */
121 /** If the linux driver has initialized the device yet and thus can we send
123 bool driverInitialized;
125 /** Update the status of the interrupt registers and schedule an interrupt
127 void updateIntStatus();
129 /** Function to generate interrupt */
130 void generateInterrupt();
132 /** Wrapper to create an event out of the thing */
133 EventWrapper<Pl050, &Pl050::generateInterrupt> intEvent;
135 /** Receive queue. This list contains all the pending commands that
136 * need to be sent to the driver
138 std::list<uint8_t> rxQueue;
140 /** Handle a command sent to the kmi and respond appropriately
142 void processCommand(uint8_t byte);
145 typedef Pl050Params Params;
149 return dynamic_cast<const Params *>(_params);
152 Pl050(const Params *p);
154 Tick read(PacketPtr pkt) override;
155 Tick write(PacketPtr pkt) override;
157 void mouseAt(uint16_t x, uint16_t y, uint8_t buttons) override;
158 void keyPress(uint32_t key, bool down) override;
160 void serialize(CheckpointOut &cp) const override;
161 void unserialize(CheckpointIn &cp) override;
164 #endif // __DEV_ARM_PL050_HH__