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