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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 | #include "jtagmon.h" | |
9 | ||
10 | #define USBBUFSIZE 1048576 | |
11 | #define JTAG_SPEED 100000 | |
12 | #define BULK_LATENCY 2 | |
13 | #define OTHER_LATENCY 1 | |
14 | ||
15 | static struct ftdi_context ftdic; | |
16 | ||
17 | static int jtagkey_latency(int latency) { | |
18 | static int current = 0; | |
19 | int ret; | |
20 | ||
21 | if (current != latency) { | |
22 | DPRINTF("switching latency\n"); | |
23 | if ((ret = ftdi_set_latency_timer(&ftdic, latency)) != 0) { | |
24 | fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
25 | return ret; | |
26 | } | |
27 | ||
28 | current = latency; | |
29 | } | |
30 | ||
31 | return ret; | |
32 | } | |
33 | ||
34 | static int jtagkey_init(unsigned short vid, unsigned short pid) { | |
35 | int ret = 0; | |
36 | unsigned char c; | |
37 | ||
38 | if ((ret = ftdi_init(&ftdic)) != 0) { | |
39 | fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
40 | return ret; | |
41 | } | |
42 | ||
43 | if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) { | |
44 | fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
45 | return ret; | |
46 | } | |
47 | ||
48 | if ((ret = ftdi_usb_reset(&ftdic)) != 0) { | |
49 | fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
50 | return ret; | |
51 | } | |
52 | ||
53 | if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) { | |
54 | fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
55 | return ret; | |
56 | } | |
57 | ||
58 | if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) { | |
59 | fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
60 | return ret; | |
61 | } | |
62 | ||
63 | if ((ret = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) { | |
64 | fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
65 | return ret; | |
66 | } | |
67 | ||
68 | if ((ret = jtagkey_latency(OTHER_LATENCY)) != 0) | |
69 | return ret; | |
70 | ||
71 | c = 0x00; | |
72 | ftdi_write_data(&ftdic, &c, 1); | |
73 | ||
74 | if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) { | |
75 | fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
76 | return ret; | |
77 | } | |
78 | ||
79 | if ((ret = ftdi_set_baudrate(&ftdic, JTAG_SPEED)) != 0) { | |
80 | fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
81 | return ret; | |
82 | } | |
83 | ||
84 | if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { | |
85 | fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
86 | return ret; | |
87 | } | |
88 | ||
89 | return ret; | |
90 | } | |
91 | ||
92 | int jtagkey_open(int num) { | |
93 | int ret; | |
94 | ||
95 | ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num)); | |
96 | ||
97 | if (ret >= 0) | |
98 | ret = 0xff; | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
103 | void jtagkey_close(int handle) { | |
104 | if (handle == 0xff) { | |
105 | ftdi_disable_bitbang(&ftdic); | |
106 | ftdi_usb_close(&ftdic); | |
107 | ftdi_deinit(&ftdic); | |
108 | } | |
109 | } | |
110 | ||
111 | void jtagkey_state(unsigned char data) { | |
112 | fprintf(stderr,"Pins high: "); | |
113 | ||
114 | if (data & JTAGKEY_TCK) | |
115 | fprintf(stderr,"TCK "); | |
116 | ||
117 | if (data & JTAGKEY_TDI) | |
118 | fprintf(stderr,"TDI "); | |
119 | ||
120 | if (data & JTAGKEY_TDO) | |
121 | fprintf(stderr,"TDO "); | |
122 | ||
123 | if (data & JTAGKEY_TMS) | |
124 | fprintf(stderr,"TMS "); | |
125 | ||
126 | if (data & JTAGKEY_VREF) | |
127 | fprintf(stderr,"VREF "); | |
128 | ||
129 | fprintf(stderr,"\n"); | |
130 | } | |
131 | ||
132 | struct jtagkey_reader_arg { | |
133 | int num; | |
134 | unsigned char *buf; | |
135 | }; | |
136 | ||
137 | static void *jtagkey_reader(void *thread_arg) { | |
138 | struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg; | |
139 | int i; | |
140 | ||
141 | i = 0; | |
142 | DPRINTF("reader for %d bytes\n", arg->num); | |
143 | while (i < arg->num) { | |
144 | i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i); | |
145 | } | |
146 | ||
147 | pthread_exit(NULL); | |
148 | } | |
149 | ||
150 | /* TODO: Interpret JTAG commands and transfer in MPSSE mode */ | |
151 | int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { | |
152 | int ret = 0; | |
153 | int i; | |
154 | int nread = 0; | |
155 | unsigned long port; | |
156 | unsigned char val; | |
157 | static unsigned char last_data = 0; | |
158 | static unsigned char last_write = 0x00; | |
159 | static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf; | |
160 | static unsigned char readbuf[USBBUFSIZE], *readpos; | |
161 | unsigned char data, prev_data, last_cyc_write; | |
162 | struct jtagkey_reader_arg targ; | |
163 | pthread_t reader_thread; | |
164 | ||
165 | /* Count reads */ | |
166 | for (i = 0; i < num; i++) | |
167 | if (tr[i].cmdTrans == PP_READ) | |
168 | nread++; | |
169 | ||
170 | /* Write combining */ | |
171 | if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) { | |
172 | unsigned char *pos = writebuf; | |
173 | int len; | |
174 | ||
175 | DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num); | |
176 | jtagkey_latency(BULK_LATENCY); | |
177 | ||
178 | targ.num = writepos-pos; | |
179 | targ.buf = readbuf; | |
180 | pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); | |
181 | ||
182 | while (pos < writepos) { | |
183 | len = writepos-pos; | |
184 | ||
185 | if (len > USBBUFSIZE) | |
186 | len = USBBUFSIZE; | |
187 | ||
188 | DPRINTF("combined write of %d/%d\n",len,writepos-pos); | |
189 | ftdi_write_data(&ftdic, pos, len); | |
190 | pos += len; | |
191 | } | |
192 | pthread_join(reader_thread, NULL); | |
193 | ||
194 | writepos = writebuf; | |
195 | } | |
196 | ||
197 | last_cyc_write = last_write; | |
198 | ||
199 | for (i = 0; i < num; i++) { | |
200 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
201 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
202 | tr[i].fAutoinc, tr[i].dwOptions); | |
203 | ||
204 | port = (unsigned long)tr[i].dwPort; | |
205 | val = tr[i].Data.Byte; | |
206 | ||
207 | #ifdef DEBUG | |
208 | if (tr[i].cmdTrans == 13) | |
209 | DPRINTF("write byte: %d\n", val); | |
210 | ||
211 | if (tr[i].cmdTrans == 13) | |
212 | jtagmon(val & PP_TCK, val & PP_TMS, val & PP_TDI); | |
213 | #endif | |
214 | ||
215 | /* Pad writebuf for read-commands in stream */ | |
216 | *writepos = last_data; | |
217 | prev_data = last_data; | |
218 | ||
219 | if (port == ppbase + PP_DATA) { | |
220 | DPRINTF("data port\n"); | |
221 | ||
222 | data = 0x00; | |
223 | switch(tr[i].cmdTrans) { | |
224 | case PP_READ: | |
225 | ret = 0; /* We don't support reading of the data port */ | |
226 | break; | |
227 | ||
228 | case PP_WRITE: | |
229 | if (val & PP_TDI) { | |
230 | data |= JTAGKEY_TDI; | |
231 | DPRINTF("TDI\n"); | |
232 | } else { | |
233 | DPRINTF("!TDI\n"); | |
234 | } | |
235 | if (val & PP_TCK) { | |
236 | data |= JTAGKEY_TCK; | |
237 | DPRINTF("TCK\n"); | |
238 | } else { | |
239 | DPRINTF("!TCK\n"); | |
240 | } | |
241 | if (val & PP_TMS) { | |
242 | data |= JTAGKEY_TMS; | |
243 | DPRINTF("TMS\n"); | |
244 | } else { | |
245 | DPRINTF("!TMS\n"); | |
246 | } | |
247 | if (val & PP_CTRL) { | |
248 | data = JTAGKEY_OEn; | |
249 | DPRINTF("CTRL\n"); | |
250 | } else { | |
251 | DPRINTF("!CTRL\n"); | |
252 | } | |
253 | ||
254 | if (val & PP_PROG) { | |
255 | DPRINTF("PROG\n"); | |
256 | } else { | |
257 | DPRINTF("!PROG\n"); | |
258 | } | |
259 | ||
260 | *writepos = data; | |
261 | ||
262 | last_data = data; | |
263 | last_write = val; | |
264 | break; | |
265 | ||
266 | default: | |
267 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
268 | ret = -1; | |
269 | break; | |
270 | } | |
271 | } | |
272 | ||
273 | if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1)) | |
274 | writepos++; | |
275 | } | |
276 | ||
277 | if (nread) | |
278 | { | |
279 | DPRINTF("writing %d bytes\n", writepos-writebuf); | |
280 | ||
281 | *writepos = last_data; | |
282 | writepos++; | |
283 | ||
284 | jtagkey_latency(OTHER_LATENCY); | |
285 | ||
286 | targ.num = writepos-writebuf; | |
287 | targ.buf = readbuf; | |
288 | pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); | |
289 | ftdi_write_data(&ftdic, writebuf, writepos-writebuf); | |
290 | pthread_join(reader_thread, NULL); | |
291 | ||
292 | #ifdef DEBUG | |
293 | DPRINTF("write: "); | |
294 | hexdump(writebuf, writepos-writebuf); | |
295 | DPRINTF("read: "); | |
296 | hexdump(readbuf, i); | |
297 | #endif | |
298 | ||
299 | writepos = writebuf; | |
300 | } else { | |
301 | return ret; | |
302 | } | |
303 | ||
304 | readpos = readbuf; | |
305 | last_write = last_cyc_write; | |
306 | ||
307 | for (i = 0; i < num; i++) { | |
308 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
309 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
310 | tr[i].fAutoinc, tr[i].dwOptions); | |
311 | ||
312 | port = (unsigned long)tr[i].dwPort; | |
313 | val = tr[i].Data.Byte; | |
314 | ||
315 | if ((tr[i].cmdTrans != PP_READ) && (val == last_write) && (i != num-1)) | |
316 | continue; | |
317 | ||
318 | readpos++; | |
319 | ||
320 | if (port == ppbase + PP_DATA) { | |
321 | if (tr[i].cmdTrans == PP_WRITE) { | |
322 | last_write = val; | |
323 | } | |
324 | } else if (port == ppbase + PP_STATUS) { | |
325 | DPRINTF("status port (last write: 0x%x)\n", last_write); | |
326 | switch(tr[i].cmdTrans) { | |
327 | case PP_READ: | |
328 | data = *readpos; | |
329 | ||
330 | #ifdef DEBUG | |
331 | DPRINTF("READ: 0x%x\n", data); | |
332 | jtagkey_state(data); | |
333 | #endif | |
334 | ||
335 | val = 0x00; | |
336 | if ((data & JTAGKEY_TDO) && (last_write & PP_PROG)) | |
337 | val |= PP_TDO; | |
338 | ||
339 | if (~last_write & PP_PROG) | |
340 | val |= 0x08; | |
341 | ||
342 | if (last_write & 0x40) | |
343 | val |= 0x20; | |
344 | else | |
345 | val |= 0x80; | |
346 | break; | |
347 | ||
348 | case PP_WRITE: | |
349 | ret = 0; /* Status Port is readonly */ | |
350 | break; | |
351 | ||
352 | default: | |
353 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
354 | ret = -1; | |
355 | break; | |
356 | } | |
357 | } else { | |
358 | ret = 0; | |
359 | } | |
360 | ||
361 | tr[i].Data.Byte = val; | |
362 | ||
363 | DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
364 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
365 | tr[i].fAutoinc, tr[i].dwOptions); | |
366 | #ifdef DEBUG | |
367 | if (tr[i].cmdTrans == 10) | |
368 | DPRINTF("read byte: %d\n", tr[i].Data.Byte); | |
369 | #endif | |
370 | } | |
371 | ||
372 | return ret; | |
373 | } |