kmi.cc revision 9808:13ffc0066b76 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 *          William Wang
42 */
43
44#include "base/vnc/vncinput.hh"
45#include "base/trace.hh"
46#include "debug/Pl050.hh"
47#include "dev/arm/amba_device.hh"
48#include "dev/arm/kmi.hh"
49#include "dev/ps2.hh"
50#include "mem/packet.hh"
51#include "mem/packet_access.hh"
52
53Pl050::Pl050(const Params *p)
54    : AmbaIntDevice(p, 0xfff), control(0), status(0x43), clkdiv(0),
55      interrupts(0), rawInterrupts(0), ackNext(false), shiftDown(false),
56      vnc(p->vnc), driverInitialized(false), intEvent(this)
57{
58    if (vnc) {
59        if (!p->is_mouse)
60            vnc->setKeyboard(this);
61        else
62            vnc->setMouse(this);
63    }
64}
65
66Tick
67Pl050::read(PacketPtr pkt)
68{
69    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
70
71    Addr daddr = pkt->getAddr() - pioAddr;
72    pkt->allocate();
73
74
75    uint32_t data = 0;
76
77    switch (daddr) {
78      case kmiCr:
79        DPRINTF(Pl050, "Read Commmand: %#x\n", (uint32_t)control);
80        data = control;
81        break;
82      case kmiStat:
83        if (rxQueue.empty())
84            status.rxfull = 0;
85        else
86            status.rxfull = 1;
87
88        DPRINTF(Pl050, "Read Status: %#x\n", (uint32_t)status);
89        data = status;
90        break;
91      case kmiData:
92        if (rxQueue.empty()) {
93            data = 0;
94        } else {
95            data = rxQueue.front();
96            rxQueue.pop_front();
97        }
98        DPRINTF(Pl050, "Read Data: %#x\n", (uint32_t)data);
99        updateIntStatus();
100        break;
101      case kmiClkDiv:
102        data = clkdiv;
103        break;
104      case kmiISR:
105        data = interrupts;
106        DPRINTF(Pl050, "Read Interrupts: %#x\n", (uint32_t)interrupts);
107        break;
108      default:
109        if (readId(pkt, ambaId, pioAddr)) {
110            // Hack for variable size accesses
111            data = pkt->get<uint32_t>();
112            break;
113        }
114
115        warn("Tried to read PL050 at offset %#x that doesn't exist\n", daddr);
116        break;
117    }
118
119    switch(pkt->getSize()) {
120      case 1:
121        pkt->set<uint8_t>(data);
122        break;
123      case 2:
124        pkt->set<uint16_t>(data);
125        break;
126      case 4:
127        pkt->set<uint32_t>(data);
128        break;
129      default:
130        panic("KMI read size too big?\n");
131        break;
132    }
133
134    pkt->makeAtomicResponse();
135    return pioDelay;
136}
137
138Tick
139Pl050::write(PacketPtr pkt)
140{
141
142    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
143
144    Addr daddr = pkt->getAddr() - pioAddr;
145
146    assert(pkt->getSize() == sizeof(uint8_t));
147
148
149    switch (daddr) {
150      case kmiCr:
151        DPRINTF(Pl050, "Write Commmand: %#x\n", (uint32_t)pkt->get<uint8_t>());
152        control = pkt->get<uint8_t>();
153        updateIntStatus();
154        break;
155      case kmiData:
156        DPRINTF(Pl050, "Write Data: %#x\n", (uint32_t)pkt->get<uint8_t>());
157        processCommand(pkt->get<uint8_t>());
158        updateIntStatus();
159        break;
160      case kmiClkDiv:
161        clkdiv = pkt->get<uint8_t>();
162        break;
163      default:
164        warn("Tried to write PL050 at offset %#x that doesn't exist\n", daddr);
165        break;
166    }
167    pkt->makeAtomicResponse();
168    return pioDelay;
169}
170
171void
172Pl050::processCommand(uint8_t byte)
173{
174    using namespace Ps2;
175
176    if (ackNext) {
177        ackNext--;
178        rxQueue.push_back(Ack);
179        updateIntStatus();
180        return;
181    }
182
183    switch (byte) {
184      case Ps2Reset:
185        rxQueue.push_back(Ack);
186        rxQueue.push_back(SelfTestPass);
187        break;
188      case SetResolution:
189      case SetRate:
190      case SetStatusLed:
191      case SetScaling1_1:
192      case SetScaling1_2:
193        rxQueue.push_back(Ack);
194        ackNext = 1;
195        break;
196      case ReadId:
197        rxQueue.push_back(Ack);
198        if (params()->is_mouse)
199            rxQueue.push_back(MouseId);
200        else
201            rxQueue.push_back(KeyboardId);
202        break;
203      case TpReadId:
204        if (!params()->is_mouse)
205            break;
206        // We're not a trackpoint device, this should make the probe go away
207        rxQueue.push_back(Ack);
208        rxQueue.push_back(0);
209        rxQueue.push_back(0);
210        // fall through
211      case Disable:
212      case Enable:
213      case SetDefaults:
214        rxQueue.push_back(Ack);
215        break;
216      case StatusRequest:
217        rxQueue.push_back(Ack);
218        rxQueue.push_back(0);
219        rxQueue.push_back(2); // default resolution
220        rxQueue.push_back(100); // default sample rate
221        break;
222      case TouchKitId:
223        ackNext = 2;
224        rxQueue.push_back(Ack);
225        rxQueue.push_back(TouchKitId);
226        rxQueue.push_back(1);
227        rxQueue.push_back('A');
228
229        driverInitialized = true;
230        break;
231      default:
232        panic("Unknown byte received: %d\n", byte);
233    }
234
235    updateIntStatus();
236}
237
238
239void
240Pl050::updateIntStatus()
241{
242    if (!rxQueue.empty())
243        rawInterrupts.rx = 1;
244    else
245        rawInterrupts.rx = 0;
246
247    interrupts.tx = rawInterrupts.tx & control.txint_enable;
248    interrupts.rx = rawInterrupts.rx & control.rxint_enable;
249
250    DPRINTF(Pl050, "rawInterupts=%#x control=%#x interrupts=%#x\n",
251            (uint32_t)rawInterrupts, (uint32_t)control, (uint32_t)interrupts);
252
253    if (interrupts && !intEvent.scheduled())
254        schedule(intEvent, curTick() + intDelay);
255}
256
257void
258Pl050::generateInterrupt()
259{
260
261    if (interrupts) {
262        gic->sendInt(intNum);
263        DPRINTF(Pl050, "Generated interrupt\n");
264    }
265}
266
267void
268Pl050::mouseAt(uint16_t x, uint16_t y, uint8_t buttons)
269{
270    using namespace Ps2;
271
272    // If the driver hasn't initialized the device yet, no need to try and send
273    // it anything. Similarly we can get vnc mouse events orders of maginture
274    // faster than m5 can process them. Only queue up two sets mouse movements
275    // and don't add more until those are processed.
276    if (!driverInitialized || rxQueue.size() > 10)
277        return;
278
279    // We shouldn't be here unless a vnc server called us in which case
280    // we should have a pointer to it
281    assert(vnc);
282
283    // Convert screen coordinates to touchpad coordinates
284    uint16_t _x = (2047.0/vnc->videoWidth()) * x;
285    uint16_t _y = (2047.0/vnc->videoHeight()) * y;
286
287    rxQueue.push_back(buttons);
288    rxQueue.push_back(_x >> 7);
289    rxQueue.push_back(_x & 0x7f);
290    rxQueue.push_back(_y >> 7);
291    rxQueue.push_back(_y & 0x7f);
292
293    updateIntStatus();
294}
295
296
297void
298Pl050::keyPress(uint32_t key, bool down)
299{
300    using namespace Ps2;
301
302    std::list<uint8_t> keys;
303
304    // convert the X11 keysym into ps2 codes
305    keySymToPs2(key, down, shiftDown, keys);
306
307    // Insert into our queue of charecters
308    rxQueue.splice(rxQueue.end(), keys);
309    updateIntStatus();
310}
311
312void
313Pl050::serialize(std::ostream &os)
314{
315    uint8_t ctrlreg = control;
316    SERIALIZE_SCALAR(ctrlreg);
317
318    uint8_t stsreg = status;
319    SERIALIZE_SCALAR(stsreg);
320    SERIALIZE_SCALAR(clkdiv);
321
322    uint8_t ints = interrupts;
323    SERIALIZE_SCALAR(ints);
324
325    uint8_t raw_ints = rawInterrupts;
326    SERIALIZE_SCALAR(raw_ints);
327
328    SERIALIZE_SCALAR(ackNext);
329    SERIALIZE_SCALAR(shiftDown);
330    SERIALIZE_SCALAR(driverInitialized);
331
332    arrayParamOut(os, "rxQueue", rxQueue);
333}
334
335void
336Pl050::unserialize(Checkpoint *cp, const std::string &section)
337{
338    uint8_t ctrlreg;
339    UNSERIALIZE_SCALAR(ctrlreg);
340    control = ctrlreg;
341
342    uint8_t stsreg;
343    UNSERIALIZE_SCALAR(stsreg);
344    status = stsreg;
345
346    UNSERIALIZE_SCALAR(clkdiv);
347
348    uint8_t ints;
349    UNSERIALIZE_SCALAR(ints);
350    interrupts = ints;
351
352    uint8_t raw_ints;
353    UNSERIALIZE_SCALAR(raw_ints);
354    rawInterrupts = raw_ints;
355
356    UNSERIALIZE_SCALAR(ackNext);
357    UNSERIALIZE_SCALAR(shiftDown);
358    UNSERIALIZE_SCALAR(driverInitialized);
359
360    arrayParamIn(cp, section, "rxQueue", rxQueue);
361}
362
363
364
365Pl050 *
366Pl050Params::create()
367{
368    return new Pl050(this);
369}
370