summaryrefslogtreecommitdiff
path: root/lib/usbhost/USB_Host_Shield_2.0/usbhub.cpp
blob: 7fed48e7812b527949b66d977f92c56cbefaf8ca (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
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
 */
#include "usbhub.h"

bool USBHub::bResetInitiated = false;

USBHub::USBHub(USB *p) :
pUsb(p),
bAddress(0),
bNbrPorts(0),
//bInitState(0),
qNextPollTime(0),
bPollEnable(false) {
        epInfo[0].epAddr = 0;
        epInfo[0].maxPktSize = 8;
        epInfo[0].epAttribs = 0;
        epInfo[0].bmNakPower = USB_NAK_MAX_POWER;

        epInfo[1].epAddr = 1;
        epInfo[1].maxPktSize = 8; //kludge
        epInfo[1].epAttribs = 0;
        epInfo[1].bmNakPower = USB_NAK_NOWAIT;

        if(pUsb)
                pUsb->RegisterDeviceClass(this);
}

uint8_t USBHub::Init(uint8_t parent, uint8_t port, bool lowspeed) {
        uint8_t buf[32];
        USB_DEVICE_DESCRIPTOR * udd = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);
        HubDescriptor* hd = reinterpret_cast<HubDescriptor*>(buf);
        USB_CONFIGURATION_DESCRIPTOR * ucd = reinterpret_cast<USB_CONFIGURATION_DESCRIPTOR*>(buf);
        uint8_t rcode;
        UsbDevice *p = NULL;
        EpInfo *oldep_ptr = NULL;
        uint8_t len = 0;
        uint16_t cd_len = 0;

        //USBTRACE("\r\nHub Init Start ");
        //D_PrintHex<uint8_t > (bInitState, 0x80);

        AddressPool &addrPool = pUsb->GetAddressPool();

        //switch (bInitState) {
        //        case 0:
        if(bAddress)
                return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;

        // Get pointer to pseudo device with address 0 assigned
        p = addrPool.GetUsbDevicePtr(0);

        if(!p)
                return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;

        if(!p->epinfo)
                return USB_ERROR_EPINFO_IS_NULL;

        // Save old pointer to EP_RECORD of address 0
        oldep_ptr = p->epinfo;

        // Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
        p->epinfo = epInfo;

        p->lowspeed = lowspeed;

        // Get device descriptor
        rcode = pUsb->getDevDescr(0, 0, 8, (uint8_t*)buf);

        p->lowspeed = false;

        if(!rcode)
                len = (buf[0] > 32) ? 32 : buf[0];

        if(rcode) {
                // Restore p->epinfo
                p->epinfo = oldep_ptr;
                return rcode;
        }

        // Extract device class from device descriptor
        // If device class is not a hub return
        if(udd->bDeviceClass != 0x09)
                return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;

        // Allocate new address according to device class
        bAddress = addrPool.AllocAddress(parent, (udd->bDeviceClass == 0x09) ? true : false, port);

        if(!bAddress)
                return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;

        // Extract Max Packet Size from the device descriptor
        epInfo[0].maxPktSize = udd->bMaxPacketSize0;

        // Assign new address to the device
        rcode = pUsb->setAddr(0, 0, bAddress);

        if(rcode) {
                // Restore p->epinfo
                p->epinfo = oldep_ptr;
                addrPool.FreeAddress(bAddress);
                bAddress = 0;
                return rcode;
        }

        //USBTRACE2("\r\nHub address: ", bAddress );

        // Restore p->epinfo
        p->epinfo = oldep_ptr;

        if(len)
                rcode = pUsb->getDevDescr(bAddress, 0, len, (uint8_t*)buf);

        if(rcode)
                goto FailGetDevDescr;

        // Assign epInfo to epinfo pointer
        rcode = pUsb->setEpInfoEntry(bAddress, 2, epInfo);

        if(rcode)
                goto FailSetDevTblEntry;

        //                bInitState = 1;

        //        case 1:
        // Get hub descriptor
        rcode = GetHubDescriptor(0, 8, buf);

        if(rcode)
                goto FailGetHubDescr;

        // Save number of ports for future use
        bNbrPorts = hd->bNbrPorts;

        //                bInitState = 2;

        //        case 2:
        // Read configuration Descriptor in Order To Obtain Proper Configuration Value
        rcode = pUsb->getConfDescr(bAddress, 0, 8, 0, buf);

        if(!rcode) {
                cd_len = ucd->wTotalLength;
                rcode = pUsb->getConfDescr(bAddress, 0, cd_len, 0, buf);
        }
        if(rcode)
                goto FailGetConfDescr;

        // The following code is of no practical use in real life applications.
        // It only intended for the usb protocol sniffer to properly parse hub-class requests.
        {
                uint8_t buf2[24];

                rcode = pUsb->getConfDescr(bAddress, 0, buf[0], 0, buf2);

                if(rcode)
                        goto FailGetConfDescr;
        }

        // Set Configuration Value
        rcode = pUsb->setConf(bAddress, 0, buf[5]);

        if(rcode)
                goto FailSetConfDescr;

        //                bInitState = 3;

        //        case 3:
        // Power on all ports
        for(uint8_t j = 1; j <= bNbrPorts; j++)
                SetPortFeature(HUB_FEATURE_PORT_POWER, j, 0); //HubPortPowerOn(j);

        pUsb->SetHubPreMask();
        bPollEnable = true;
        //                bInitState = 0;
        //}
        //bInitState = 0;
        //USBTRACE("...OK\r\n");
        return 0;

        // Oleg, No debugging?? -- xxxajk
FailGetDevDescr:
        goto Fail;

FailSetDevTblEntry:
        goto Fail;

FailGetHubDescr:
        goto Fail;

FailGetConfDescr:
        goto Fail;

FailSetConfDescr:
        goto Fail;

Fail:
        USBTRACE("...FAIL\r\n");
        return rcode;
}

uint8_t USBHub::Release() {
        pUsb->GetAddressPool().FreeAddress(bAddress);

        if(bAddress == 0x41)
                pUsb->SetHubPreMask();

        bAddress = 0;
        bNbrPorts = 0;
        qNextPollTime = 0;
        bPollEnable = false;
        return 0;
}

uint8_t USBHub::Poll() {
        uint8_t rcode = 0;

        if(!bPollEnable)
                return 0;

        if(((long)(millis() - qNextPollTime) >= 0L)) {
                rcode = CheckHubStatus();
                qNextPollTime = millis() + 100;
        }
        return rcode;
}

uint8_t USBHub::CheckHubStatus() {
        uint8_t rcode;
        uint8_t buf[8];
        uint16_t read = 1;

        rcode = pUsb->inTransfer(bAddress, 1, &read, buf);

        if(rcode)
                return rcode;

        //if (buf[0] & 0x01) // Hub Status Change
        //{
        //        pUsb->PrintHubStatus(addr);
        //        rcode = GetHubStatus(1, 0, 1, 4, buf);
        //        if (rcode)
        //        {
        //                USB_HOST_SERIAL.print("GetHubStatus Error");
        //                USB_HOST_SERIAL.println(rcode, HEX);
        //                return rcode;
        //        }
        //}
        for(uint8_t port = 1, mask = 0x02; port < 8; mask <<= 1, port++) {
                if(buf[0] & mask) {
                        HubEvent evt;
                        evt.bmEvent = 0;

                        rcode = GetPortStatus(port, 4, evt.evtBuff);

                        if(rcode)
                                continue;

                        rcode = PortStatusChange(port, evt);

                        if(rcode == HUB_ERROR_PORT_HAS_BEEN_RESET)
                                return 0;

                        if(rcode)
                                return rcode;
                }
        } // for

        for(uint8_t port = 1; port <= bNbrPorts; port++) {
                HubEvent evt;
                evt.bmEvent = 0;

                rcode = GetPortStatus(port, 4, evt.evtBuff);

                if(rcode)
                        continue;

                if((evt.bmStatus & bmHUB_PORT_STATE_CHECK_DISABLED) != bmHUB_PORT_STATE_DISABLED)
                        continue;

                // Emulate connection event for the port
                evt.bmChange |= bmHUB_PORT_STATUS_C_PORT_CONNECTION;

                rcode = PortStatusChange(port, evt);

                if(rcode == HUB_ERROR_PORT_HAS_BEEN_RESET)
                        return 0;

                if(rcode)
                        return rcode;
        } // for
        return 0;
}

void USBHub::ResetHubPort(uint8_t port) {
        HubEvent evt;
        evt.bmEvent = 0;
        uint8_t rcode;

        ClearPortFeature(HUB_FEATURE_C_PORT_ENABLE, port, 0);
        ClearPortFeature(HUB_FEATURE_C_PORT_CONNECTION, port, 0);
        SetPortFeature(HUB_FEATURE_PORT_RESET, port, 0);


        for(int i = 0; i < 3; i++) {
                rcode = GetPortStatus(port, 4, evt.evtBuff);
                if(rcode) break; // Some kind of error, bail.
                if(evt.bmEvent == bmHUB_PORT_EVENT_RESET_COMPLETE || evt.bmEvent == bmHUB_PORT_EVENT_LS_RESET_COMPLETE) {
                        break;
                }
                delay(100); // simulate polling.
        }
        ClearPortFeature(HUB_FEATURE_C_PORT_RESET, port, 0);
        ClearPortFeature(HUB_FEATURE_C_PORT_CONNECTION, port, 0);
        delay(20);
}

uint8_t USBHub::PortStatusChange(uint8_t port, HubEvent &evt) {
        switch(evt.bmEvent) {
                        // Device connected event
                case bmHUB_PORT_EVENT_CONNECT:
                case bmHUB_PORT_EVENT_LS_CONNECT:
                        if(bResetInitiated)
                                return 0;

                        ClearPortFeature(HUB_FEATURE_C_PORT_ENABLE, port, 0);
                        ClearPortFeature(HUB_FEATURE_C_PORT_CONNECTION, port, 0);
                        SetPortFeature(HUB_FEATURE_PORT_RESET, port, 0);
                        bResetInitiated = true;
                        return HUB_ERROR_PORT_HAS_BEEN_RESET;

                        // Device disconnected event
                case bmHUB_PORT_EVENT_DISCONNECT:
                        ClearPortFeature(HUB_FEATURE_C_PORT_ENABLE, port, 0);
                        ClearPortFeature(HUB_FEATURE_C_PORT_CONNECTION, port, 0);
                        bResetInitiated = false;

                        UsbDeviceAddress a;
                        a.devAddress = 0;
                        a.bmHub = 0;
                        a.bmParent = bAddress;
                        a.bmAddress = port;
                        pUsb->ReleaseDevice(a.devAddress);
                        return 0;

                        // Reset complete event
                case bmHUB_PORT_EVENT_RESET_COMPLETE:
                case bmHUB_PORT_EVENT_LS_RESET_COMPLETE:
                        ClearPortFeature(HUB_FEATURE_C_PORT_RESET, port, 0);
                        ClearPortFeature(HUB_FEATURE_C_PORT_CONNECTION, port, 0);

                        delay(20);

                        a.devAddress = bAddress;

                        pUsb->Configuring(a.bmAddress, port, (evt.bmStatus & bmHUB_PORT_STATUS_PORT_LOW_SPEED));
                        bResetInitiated = false;
                        break;

        } // switch (evt.bmEvent)
        return 0;
}

void PrintHubPortStatus(USBHub *hubptr, uint8_t addr, uint8_t port, bool print_changes) {
        uint8_t rcode = 0;
        HubEvent evt;

        rcode = hubptr->GetPortStatus(port, 4, evt.evtBuff);

        if(rcode) {
                USB_HOST_SERIAL.println("ERROR!");
                return;
        }
        USB_HOST_SERIAL.print("\r\nPort ");
        USB_HOST_SERIAL.println(port, DEC);

        USB_HOST_SERIAL.println("Status");
        USB_HOST_SERIAL.print("CONNECTION:\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_CONNECTION) > 0, DEC);
        USB_HOST_SERIAL.print("ENABLE:\t\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_ENABLE) > 0, DEC);
        USB_HOST_SERIAL.print("SUSPEND:\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_SUSPEND) > 0, DEC);
        USB_HOST_SERIAL.print("OVER_CURRENT:\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_OVER_CURRENT) > 0, DEC);
        USB_HOST_SERIAL.print("RESET:\t\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_RESET) > 0, DEC);
        USB_HOST_SERIAL.print("POWER:\t\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_POWER) > 0, DEC);
        USB_HOST_SERIAL.print("LOW_SPEED:\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_LOW_SPEED) > 0, DEC);
        USB_HOST_SERIAL.print("HIGH_SPEED:\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_HIGH_SPEED) > 0, DEC);
        USB_HOST_SERIAL.print("TEST:\t\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_TEST) > 0, DEC);
        USB_HOST_SERIAL.print("INDICATOR:\t");
        USB_HOST_SERIAL.println((evt.bmStatus & bmHUB_PORT_STATUS_PORT_INDICATOR) > 0, DEC);

        if(!print_changes)
                return;

        USB_HOST_SERIAL.println("\r\nChange");
        USB_HOST_SERIAL.print("CONNECTION:\t");
        USB_HOST_SERIAL.println((evt.bmChange & bmHUB_PORT_STATUS_C_PORT_CONNECTION) > 0, DEC);
        USB_HOST_SERIAL.print("ENABLE:\t\t");
        USB_HOST_SERIAL.println((evt.bmChange & bmHUB_PORT_STATUS_C_PORT_ENABLE) > 0, DEC);
        USB_HOST_SERIAL.print("SUSPEND:\t");
        USB_HOST_SERIAL.println((evt.bmChange & bmHUB_PORT_STATUS_C_PORT_SUSPEND) > 0, DEC);
        USB_HOST_SERIAL.print("OVER_CURRENT:\t");
        USB_HOST_SERIAL.println((evt.bmChange & bmHUB_PORT_STATUS_C_PORT_OVER_CURRENT) > 0, DEC);
        USB_HOST_SERIAL.print("RESET:\t\t");
        USB_HOST_SERIAL.println((evt.bmChange & bmHUB_PORT_STATUS_C_PORT_RESET) > 0, DEC);
}