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1 | #include <stdio.h> | |
2 | #include <ftdi.h> | |
3 | #include <unistd.h> | |
4 | #include <pthread.h> | |
5 | #include "usb-driver.h" | |
6 | #include "config.h" | |
7 | #include "jtagkey.h" | |
8 | ||
9 | #define USBBUFSIZE 1048576 | |
10 | #define SLOW_AND_SAFE 1 | |
11 | ||
12 | static struct ftdi_context ftdic; | |
13 | static unsigned char bitbang_mode; | |
14 | ||
15 | static int jtagkey_init(unsigned short vid, unsigned short pid) { | |
16 | int ret = 0; | |
17 | unsigned char c; | |
18 | ||
19 | if ((ret = ftdi_init(&ftdic)) != 0) { | |
20 | fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
21 | return ret; | |
22 | } | |
23 | ||
24 | if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) { | |
25 | fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
26 | return ret; | |
27 | } | |
28 | ||
29 | if ((ret = ftdi_usb_reset(&ftdic)) != 0) { | |
30 | fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
31 | return ret; | |
32 | } | |
33 | ||
34 | if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) { | |
35 | fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
36 | return ret; | |
37 | } | |
38 | ||
39 | if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) { | |
40 | fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
41 | return ret; | |
42 | } | |
43 | ||
44 | if ((ret = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) { | |
45 | fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
46 | return ret; | |
47 | } | |
48 | ||
49 | if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { | |
50 | fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
51 | return ret; | |
52 | } | |
53 | ||
54 | if ((ret = ftdi_set_baudrate(&ftdic, 500000)) != 0) { | |
55 | fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
56 | return ret; | |
57 | } | |
58 | ||
59 | c = 0x00; | |
60 | ftdi_write_data(&ftdic, &c, 1); | |
61 | ||
62 | if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) { | |
63 | fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
64 | return ret; | |
65 | } | |
66 | ||
67 | bitbang_mode = BITMODE_SYNCBB; | |
68 | ||
69 | if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { | |
70 | fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
71 | return ret; | |
72 | } | |
73 | ||
74 | return ret; | |
75 | } | |
76 | ||
77 | int jtagkey_open(int num) { | |
78 | int ret; | |
79 | ||
80 | ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num)); | |
81 | ||
82 | if (ret >= 0) | |
83 | ret = 0xff; | |
84 | ||
85 | return ret; | |
86 | } | |
87 | ||
88 | void jtagkey_close(int handle) { | |
89 | if (handle == 0xff) { | |
90 | ftdi_disable_bitbang(&ftdic); | |
91 | ftdi_usb_close(&ftdic); | |
92 | ftdi_deinit(&ftdic); | |
93 | } | |
94 | } | |
95 | ||
96 | #ifndef SLOW_AND_SAFE | |
97 | static int jtagkey_set_bbmode(unsigned char mode) { | |
98 | int ret = 0; | |
99 | ||
100 | if (bitbang_mode != mode) { | |
101 | DPRINTF("switching bitbang-mode!\n"); | |
102 | ||
103 | /* Wait for the latency-timer to kick in */ | |
104 | usleep(2); | |
105 | if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, mode)) != 0) { | |
106 | fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
107 | return ret; | |
108 | } | |
109 | if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { | |
110 | fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
111 | return ret; | |
112 | } | |
113 | /* Wait for the FTDI2232 to settle */ | |
114 | usleep(2); | |
115 | ||
116 | bitbang_mode = mode; | |
117 | } | |
118 | ||
119 | return ret; | |
120 | } | |
121 | #endif | |
122 | ||
123 | void jtagkey_state(unsigned char data) { | |
124 | fprintf(stderr,"Pins high: "); | |
125 | ||
126 | if (data & JTAGKEY_TCK) | |
127 | fprintf(stderr,"TCK "); | |
128 | ||
129 | if (data & JTAGKEY_TDI) | |
130 | fprintf(stderr,"TDI "); | |
131 | ||
132 | if (data & JTAGKEY_TDO) | |
133 | fprintf(stderr,"TDO "); | |
134 | ||
135 | if (data & JTAGKEY_TMS) | |
136 | fprintf(stderr,"TMS "); | |
137 | ||
138 | if (data & JTAGKEY_VREF) | |
139 | fprintf(stderr,"VREF "); | |
140 | ||
141 | fprintf(stderr,"\n"); | |
142 | } | |
143 | ||
144 | struct jtagkey_reader_arg { | |
145 | int num; | |
146 | unsigned char *buf; | |
147 | }; | |
148 | ||
149 | static void *jtagkey_reader(void *thread_arg) { | |
150 | struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg; | |
151 | ||
152 | int i; | |
153 | ||
154 | i = 0; | |
155 | DPRINTF("reader for %d bytes\n", arg->num); | |
156 | while (i < arg->num) { | |
157 | i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i); | |
158 | } | |
159 | ||
160 | pthread_exit(NULL); | |
161 | } | |
162 | ||
163 | int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { | |
164 | int ret = 0; | |
165 | int i; | |
166 | int nread = 0; | |
167 | unsigned long port; | |
168 | unsigned char val; | |
169 | static unsigned char last_data = 0; | |
170 | static unsigned char last_write = 0x00; | |
171 | static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf; | |
172 | static unsigned char readbuf[USBBUFSIZE], *readpos; | |
173 | unsigned char data, prev_data; | |
174 | struct jtagkey_reader_arg targ; | |
175 | pthread_t reader_thread; | |
176 | ||
177 | /* Count reads */ | |
178 | for (i = 0; i < num; i++) | |
179 | if (tr[i].cmdTrans == PP_READ) | |
180 | nread++; | |
181 | ||
182 | /* Write combining */ | |
183 | if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) { | |
184 | unsigned char *pos = writebuf; | |
185 | int len; | |
186 | ||
187 | DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num); | |
188 | ||
189 | #ifndef SLOW_AND_SAFE | |
190 | jtagkey_set_bbmode(BITMODE_BITBANG); | |
191 | #endif | |
192 | #ifdef SLOW_AND_SAFE | |
193 | targ.num = writepos-pos; | |
194 | targ.buf = readbuf; | |
195 | pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); | |
196 | #endif | |
197 | while (pos < writepos) { | |
198 | len = writepos-pos; | |
199 | ||
200 | if (len > USBBUFSIZE) | |
201 | len = USBBUFSIZE; | |
202 | ||
203 | DPRINTF("combined write of %d/%d\n",len,writepos-pos); | |
204 | ftdi_write_data(&ftdic, pos, len); | |
205 | pos += len; | |
206 | } | |
207 | #ifdef SLOW_AND_SAFE | |
208 | pthread_join(reader_thread, NULL); | |
209 | #endif | |
210 | ||
211 | writepos = writebuf; | |
212 | } | |
213 | ||
214 | for (i = 0; i < num; i++) { | |
215 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
216 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
217 | tr[i].fAutoinc, tr[i].dwOptions); | |
218 | ||
219 | port = (unsigned long)tr[i].dwPort; | |
220 | val = tr[i].Data.Byte; | |
221 | ||
222 | #ifdef DEBUG | |
223 | if (tr[i].cmdTrans == 13) | |
224 | DPRINTF("write byte: %d\n", val); | |
225 | #endif | |
226 | ||
227 | /* Pad writebuf for read-commands in stream */ | |
228 | *writepos = last_data; | |
229 | prev_data = last_data; | |
230 | ||
231 | if (port == ppbase + PP_DATA) { | |
232 | DPRINTF("data port\n"); | |
233 | ||
234 | data = 0x00; | |
235 | switch(tr[i].cmdTrans) { | |
236 | case PP_READ: | |
237 | ret = 0; /* We don't support reading of the data port */ | |
238 | break; | |
239 | ||
240 | case PP_WRITE: | |
241 | if (val & PP_TDI) { | |
242 | data |= JTAGKEY_TDI; | |
243 | DPRINTF("TDI\n"); | |
244 | } else { | |
245 | DPRINTF("!TDI\n"); | |
246 | } | |
247 | if (val & PP_TCK) { | |
248 | data |= JTAGKEY_TCK; | |
249 | DPRINTF("TCK\n"); | |
250 | } else { | |
251 | DPRINTF("!TCK\n"); | |
252 | } | |
253 | if (val & PP_TMS) { | |
254 | data |= JTAGKEY_TMS; | |
255 | DPRINTF("TMS\n"); | |
256 | } else { | |
257 | DPRINTF("!TMS\n"); | |
258 | } | |
259 | if (val & PP_CTRL) { | |
260 | data = JTAGKEY_OEn; | |
261 | DPRINTF("CTRL\n"); | |
262 | } else { | |
263 | DPRINTF("!CTRL\n"); | |
264 | } | |
265 | ||
266 | if (val & PP_PROG) { | |
267 | DPRINTF("PROG\n"); | |
268 | } else { | |
269 | DPRINTF("!PROG\n"); | |
270 | } | |
271 | ||
272 | *writepos = data; | |
273 | ||
274 | last_data = data; | |
275 | last_write = val; | |
276 | break; | |
277 | ||
278 | default: | |
279 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
280 | ret = -1; | |
281 | break; | |
282 | } | |
283 | } | |
284 | ||
285 | if (nread || (*writepos != prev_data) || (i == num-1)) | |
286 | writepos++; | |
287 | } | |
288 | ||
289 | if (nread) | |
290 | { | |
291 | DPRINTF("writing %d bytes\n", writepos-writebuf); | |
292 | ||
293 | *writepos = last_data; | |
294 | writepos++; | |
295 | ||
296 | #ifndef SLOW_AND_SAFE | |
297 | jtagkey_set_bbmode(BITMODE_SYNCBB); | |
298 | #endif | |
299 | targ.num = writepos-writebuf; | |
300 | targ.buf = readbuf; | |
301 | pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); | |
302 | ftdi_write_data(&ftdic, writebuf, writepos-writebuf); | |
303 | pthread_join(reader_thread, NULL); | |
304 | ||
305 | #ifdef DEBUG | |
306 | DPRINTF("write: "); | |
307 | hexdump(writebuf, writepos-writebuf); | |
308 | DPRINTF("read: "); | |
309 | hexdump(readbuf, i); | |
310 | #endif | |
311 | ||
312 | writepos = writebuf; | |
313 | } else { | |
314 | return ret; | |
315 | } | |
316 | ||
317 | readpos = readbuf; | |
318 | ||
319 | for (i = 0; i < num; i++) { | |
320 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
321 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
322 | tr[i].fAutoinc, tr[i].dwOptions); | |
323 | ||
324 | port = (unsigned long)tr[i].dwPort; | |
325 | val = tr[i].Data.Byte; | |
326 | readpos++; | |
327 | ||
328 | if (port == ppbase + PP_DATA) { | |
329 | if (tr[i].cmdTrans == PP_WRITE) { | |
330 | last_write = val; | |
331 | } | |
332 | } else if (port == ppbase + PP_STATUS) { | |
333 | DPRINTF("status port (last write: 0x%x)\n", last_write); | |
334 | switch(tr[i].cmdTrans) { | |
335 | case PP_READ: | |
336 | data = *readpos; | |
337 | ||
338 | #ifdef DEBUG | |
339 | DPRINTF("READ: 0x%x\n", data); | |
340 | jtagkey_state(data); | |
341 | #endif | |
342 | ||
343 | val = 0x00; | |
344 | if ((data & JTAGKEY_TDO) && (last_write & PP_PROG)) | |
345 | val |= PP_TDO; | |
346 | ||
347 | if (!(last_write & PP_PROG)) | |
348 | val |= 0x08; | |
349 | ||
350 | if (last_write & 0x40) | |
351 | val |= 0x20; | |
352 | else | |
353 | val |= 0x80; | |
354 | break; | |
355 | ||
356 | case PP_WRITE: | |
357 | ret = 0; /* Status Port is readonly */ | |
358 | break; | |
359 | ||
360 | default: | |
361 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
362 | ret = -1; | |
363 | break; | |
364 | } | |
365 | } else { | |
366 | ret = 0; | |
367 | } | |
368 | ||
369 | tr[i].Data.Byte = val; | |
370 | ||
371 | DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
372 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
373 | tr[i].fAutoinc, tr[i].dwOptions); | |
374 | #ifdef DEBUG | |
375 | if (tr[i].cmdTrans == 10) | |
376 | DPRINTF("read byte: %d\n", tr[i].Data.Byte); | |
377 | #endif | |
378 | } | |
379 | ||
380 | return ret; | |
381 | } |