summaryrefslogtreecommitdiff
path: root/src/dev/arm/kmi.cc
blob: 941546743f02e299bd95a5dbaf13f14a6c814f75 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
/*
 * Copyright (c) 2010 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * 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 MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * 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 DAMAGE.
 *
 * Authors: Ali Saidi
 *          William Wang
 */

#include "dev/arm/kmi.hh"

#include "base/trace.hh"
#include "base/vnc/vncinput.hh"
#include "debug/Pl050.hh"
#include "dev/arm/amba_device.hh"
#include "dev/ps2.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"

Pl050::Pl050(const Params *p)
    : AmbaIntDevice(p, 0xfff), control(0), status(0x43), clkdiv(0),
      interrupts(0), rawInterrupts(0), ackNext(false), shiftDown(false),
      vnc(p->vnc), driverInitialized(false), intEvent(this)
{
    if (vnc) {
        if (!p->is_mouse)
            vnc->setKeyboard(this);
        else
            vnc->setMouse(this);
    }
}

Tick
Pl050::read(PacketPtr pkt)
{
    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);

    Addr daddr = pkt->getAddr() - pioAddr;

    uint32_t data = 0;

    switch (daddr) {
      case kmiCr:
        DPRINTF(Pl050, "Read Commmand: %#x\n", (uint32_t)control);
        data = control;
        break;
      case kmiStat:
        if (rxQueue.empty())
            status.rxfull = 0;
        else
            status.rxfull = 1;

        DPRINTF(Pl050, "Read Status: %#x\n", (uint32_t)status);
        data = status;
        break;
      case kmiData:
        if (rxQueue.empty()) {
            data = 0;
        } else {
            data = rxQueue.front();
            rxQueue.pop_front();
        }
        DPRINTF(Pl050, "Read Data: %#x\n", (uint32_t)data);
        updateIntStatus();
        break;
      case kmiClkDiv:
        data = clkdiv;
        break;
      case kmiISR:
        data = interrupts;
        DPRINTF(Pl050, "Read Interrupts: %#x\n", (uint32_t)interrupts);
        break;
      default:
        if (readId(pkt, ambaId, pioAddr)) {
            // Hack for variable size accesses
            data = pkt->get<uint32_t>();
            break;
        }

        warn("Tried to read PL050 at offset %#x that doesn't exist\n", daddr);
        break;
    }

    switch(pkt->getSize()) {
      case 1:
        pkt->set<uint8_t>(data);
        break;
      case 2:
        pkt->set<uint16_t>(data);
        break;
      case 4:
        pkt->set<uint32_t>(data);
        break;
      default:
        panic("KMI read size too big?\n");
        break;
    }

    pkt->makeAtomicResponse();
    return pioDelay;
}

Tick
Pl050::write(PacketPtr pkt)
{

    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);

    Addr daddr = pkt->getAddr() - pioAddr;

    assert(pkt->getSize() == sizeof(uint8_t));


    switch (daddr) {
      case kmiCr:
        DPRINTF(Pl050, "Write Commmand: %#x\n", (uint32_t)pkt->get<uint8_t>());
        control = pkt->get<uint8_t>();
        updateIntStatus();
        break;
      case kmiData:
        DPRINTF(Pl050, "Write Data: %#x\n", (uint32_t)pkt->get<uint8_t>());
        processCommand(pkt->get<uint8_t>());
        updateIntStatus();
        break;
      case kmiClkDiv:
        clkdiv = pkt->get<uint8_t>();
        break;
      default:
        warn("Tried to write PL050 at offset %#x that doesn't exist\n", daddr);
        break;
    }
    pkt->makeAtomicResponse();
    return pioDelay;
}

void
Pl050::processCommand(uint8_t byte)
{
    using namespace Ps2;

    if (ackNext) {
        ackNext--;
        rxQueue.push_back(Ack);
        updateIntStatus();
        return;
    }

    switch (byte) {
      case Ps2Reset:
        rxQueue.push_back(Ack);
        rxQueue.push_back(SelfTestPass);
        break;
      case SetResolution:
      case SetRate:
      case SetStatusLed:
      case SetScaling1_1:
      case SetScaling1_2:
        rxQueue.push_back(Ack);
        ackNext = 1;
        break;
      case ReadId:
        rxQueue.push_back(Ack);
        if (params()->is_mouse)
            rxQueue.push_back(MouseId);
        else
            rxQueue.push_back(KeyboardId);
        break;
      case TpReadId:
        if (!params()->is_mouse)
            break;
        // We're not a trackpoint device, this should make the probe go away
        rxQueue.push_back(Ack);
        rxQueue.push_back(0);
        rxQueue.push_back(0);
        // fall through
      case Disable:
      case Enable:
      case SetDefaults:
        rxQueue.push_back(Ack);
        break;
      case StatusRequest:
        rxQueue.push_back(Ack);
        rxQueue.push_back(0);
        rxQueue.push_back(2); // default resolution
        rxQueue.push_back(100); // default sample rate
        break;
      case TouchKitId:
        ackNext = 2;
        rxQueue.push_back(Ack);
        rxQueue.push_back(TouchKitId);
        rxQueue.push_back(1);
        rxQueue.push_back('A');

        driverInitialized = true;
        break;
      default:
        panic("Unknown byte received: %d\n", byte);
    }

    updateIntStatus();
}


void
Pl050::updateIntStatus()
{
    if (!rxQueue.empty())
        rawInterrupts.rx = 1;
    else
        rawInterrupts.rx = 0;

    interrupts.tx = rawInterrupts.tx & control.txint_enable;
    interrupts.rx = rawInterrupts.rx & control.rxint_enable;

    DPRINTF(Pl050, "rawInterupts=%#x control=%#x interrupts=%#x\n",
            (uint32_t)rawInterrupts, (uint32_t)control, (uint32_t)interrupts);

    if (interrupts && !intEvent.scheduled())
        schedule(intEvent, curTick() + intDelay);
}

void
Pl050::generateInterrupt()
{

    if (interrupts) {
        gic->sendInt(intNum);
        DPRINTF(Pl050, "Generated interrupt\n");
    }
}

void
Pl050::mouseAt(uint16_t x, uint16_t y, uint8_t buttons)
{
    using namespace Ps2;

    // If the driver hasn't initialized the device yet, no need to try and send
    // it anything. Similarly we can get vnc mouse events orders of maginture
    // faster than m5 can process them. Only queue up two sets mouse movements
    // and don't add more until those are processed.
    if (!driverInitialized || rxQueue.size() > 10)
        return;

    // We shouldn't be here unless a vnc server called us in which case
    // we should have a pointer to it
    assert(vnc);

    // Convert screen coordinates to touchpad coordinates
    uint16_t _x = (2047.0/vnc->videoWidth()) * x;
    uint16_t _y = (2047.0/vnc->videoHeight()) * y;

    rxQueue.push_back(buttons);
    rxQueue.push_back(_x >> 7);
    rxQueue.push_back(_x & 0x7f);
    rxQueue.push_back(_y >> 7);
    rxQueue.push_back(_y & 0x7f);

    updateIntStatus();
}


void
Pl050::keyPress(uint32_t key, bool down)
{
    using namespace Ps2;

    std::list<uint8_t> keys;

    // convert the X11 keysym into ps2 codes
    keySymToPs2(key, down, shiftDown, keys);

    // Insert into our queue of charecters
    rxQueue.splice(rxQueue.end(), keys);
    updateIntStatus();
}

void
Pl050::serialize(CheckpointOut &cp) const
{
    uint8_t ctrlreg = control;
    SERIALIZE_SCALAR(ctrlreg);

    uint8_t stsreg = status;
    SERIALIZE_SCALAR(stsreg);
    SERIALIZE_SCALAR(clkdiv);

    uint8_t ints = interrupts;
    SERIALIZE_SCALAR(ints);

    uint8_t raw_ints = rawInterrupts;
    SERIALIZE_SCALAR(raw_ints);

    SERIALIZE_SCALAR(ackNext);
    SERIALIZE_SCALAR(shiftDown);
    SERIALIZE_SCALAR(driverInitialized);

    SERIALIZE_CONTAINER(rxQueue);
}

void
Pl050::unserialize(CheckpointIn &cp)
{
    uint8_t ctrlreg;
    UNSERIALIZE_SCALAR(ctrlreg);
    control = ctrlreg;

    uint8_t stsreg;
    UNSERIALIZE_SCALAR(stsreg);
    status = stsreg;

    UNSERIALIZE_SCALAR(clkdiv);

    uint8_t ints;
    UNSERIALIZE_SCALAR(ints);
    interrupts = ints;

    uint8_t raw_ints;
    UNSERIALIZE_SCALAR(raw_ints);
    rawInterrupts = raw_ints;

    UNSERIALIZE_SCALAR(ackNext);
    UNSERIALIZE_SCALAR(shiftDown);
    UNSERIALIZE_SCALAR(driverInitialized);

    UNSERIALIZE_CONTAINER(rxQueue);
}



Pl050 *
Pl050Params::create()
{
    return new Pl050(this);
}