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1 | #include <stdio.h> | |
2 | #include <ftdi.h> | |
3 | #include "usb-driver.h" | |
4 | #include "jtagkey.h" | |
5 | ||
6 | #define USBBUFSIZE 4096 | |
7 | ||
8 | static struct ftdi_context ftdic; | |
9 | static unsigned int usb_maxlen = 0; | |
10 | ||
11 | int jtagkey_init(unsigned short vid, unsigned short pid) { | |
12 | int ret = 0; | |
13 | unsigned char c; | |
14 | ||
15 | if ((ret = ftdi_init(&ftdic)) != 0) { | |
16 | fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
17 | return ret; | |
18 | } | |
19 | ||
20 | if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) { | |
21 | fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
22 | return ret; | |
23 | } | |
24 | ||
25 | if ((ret = ftdi_usb_reset(&ftdic)) != 0) { | |
26 | fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
27 | return ret; | |
28 | } | |
29 | ||
30 | if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) { | |
31 | fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
32 | return ret; | |
33 | } | |
34 | ||
35 | ||
36 | if ((ret = ftdi_write_data_get_chunksize(&ftdic, &usb_maxlen)) != 0) { | |
37 | fprintf(stderr, "unable to get write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { | |
42 | fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
43 | return ret; | |
44 | } | |
45 | ||
46 | if ((ret = ftdi_set_baudrate(&ftdic, 500000)) != 0) { | |
47 | fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
48 | return ret; | |
49 | } | |
50 | ||
51 | c = 0x00; | |
52 | ftdi_write_data(&ftdic, &c, 1); | |
53 | ||
54 | if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_BITBANG)) != 0) { | |
55 | fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
56 | return ret; | |
57 | } | |
58 | ||
59 | if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { | |
60 | fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
61 | return ret; | |
62 | } | |
63 | ||
64 | return ret; | |
65 | } | |
66 | ||
67 | void jtagkey_close() { | |
68 | ftdi_disable_bitbang(&ftdic); | |
69 | ftdi_usb_close(&ftdic); | |
70 | ftdi_deinit(&ftdic); | |
71 | } | |
72 | ||
73 | void jtagkey_state(unsigned char data) { | |
74 | fprintf(stderr,"Pins high: "); | |
75 | ||
76 | if (data & JTAGKEY_TCK) | |
77 | fprintf(stderr,"TCK "); | |
78 | ||
79 | if (data & JTAGKEY_TDI) | |
80 | fprintf(stderr,"TDI "); | |
81 | ||
82 | if (data & JTAGKEY_TDO) | |
83 | fprintf(stderr,"TDO "); | |
84 | ||
85 | if (data & JTAGKEY_TMS) | |
86 | fprintf(stderr,"TMS "); | |
87 | ||
88 | if (data & JTAGKEY_VREF) | |
89 | fprintf(stderr,"VREF "); | |
90 | ||
91 | fprintf(stderr,"\n"); | |
92 | } | |
93 | ||
94 | int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { | |
95 | int ret = 0; | |
96 | int i; | |
97 | int nread = 0; | |
98 | unsigned long port; | |
99 | unsigned char val; | |
100 | static unsigned char last_data = 0; | |
101 | static unsigned char last_write = 0x00; | |
102 | static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf; | |
103 | static unsigned char readbuf[USBBUFSIZE], *readpos; | |
104 | unsigned char data, prev_data; | |
105 | ||
106 | /* Count reads */ | |
107 | for (i = 0; i < num; i++) | |
108 | if (tr[i].cmdTrans == PP_READ) | |
109 | nread++; | |
110 | ||
111 | /* Write combining */ | |
112 | if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) { | |
113 | unsigned char *pos = writebuf; | |
114 | int len; | |
115 | DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num); | |
116 | ||
117 | while (pos < writepos) { | |
118 | len = writepos-pos; | |
119 | ||
120 | if (len > usb_maxlen) | |
121 | len = usb_maxlen; | |
122 | ||
123 | DPRINTF("combined write of %d/%d\n",len,writepos-pos); | |
124 | ftdi_write_data(&ftdic, pos, len); | |
125 | pos += len; | |
126 | } | |
127 | ||
128 | DPRINTF("read %d/%d bytes\n", i, writepos-writebuf); | |
129 | writepos = writebuf; | |
130 | } | |
131 | ||
132 | for (i = 0; i < num; i++) { | |
133 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
134 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
135 | tr[i].fAutoinc, tr[i].dwOptions); | |
136 | ||
137 | port = (unsigned long)tr[i].dwPort; | |
138 | val = tr[i].Data.Byte; | |
139 | ||
140 | #ifdef DEBUG | |
141 | if (tr[i].cmdTrans == 13) | |
142 | DPRINTF("write byte: %d\n", val); | |
143 | #endif | |
144 | ||
145 | /* Pad writebuf for read-commands in stream */ | |
146 | *writepos = last_data; | |
147 | prev_data = last_data; | |
148 | ||
149 | if (port == ppbase + PP_DATA) { | |
150 | DPRINTF("data port\n"); | |
151 | ||
152 | data = 0x00; | |
153 | switch(tr[i].cmdTrans) { | |
154 | case PP_READ: | |
155 | ret = 0; /* We don't support reading of the data port */ | |
156 | break; | |
157 | ||
158 | case PP_WRITE: | |
159 | if (val & PP_TDI) { | |
160 | data |= JTAGKEY_TDI; | |
161 | DPRINTF("TDI\n"); | |
162 | } else { | |
163 | DPRINTF("!TDI\n"); | |
164 | } | |
165 | if (val & PP_TCK) { | |
166 | data |= JTAGKEY_TCK; | |
167 | DPRINTF("TCK\n"); | |
168 | } else { | |
169 | DPRINTF("!TCK\n"); | |
170 | } | |
171 | if (val & PP_TMS) { | |
172 | data |= JTAGKEY_TMS; | |
173 | DPRINTF("TMS\n"); | |
174 | } else { | |
175 | DPRINTF("!TMS\n"); | |
176 | } | |
177 | if (val & PP_CTRL) { | |
178 | data = JTAGKEY_OEn; | |
179 | DPRINTF("CTRL\n"); | |
180 | } else { | |
181 | DPRINTF("!CTRL\n"); | |
182 | } | |
183 | ||
184 | if (val & PP_PROG) { | |
185 | DPRINTF("PROG\n"); | |
186 | } else { | |
187 | DPRINTF("!PROG\n"); | |
188 | } | |
189 | ||
190 | *writepos = data; | |
191 | ||
192 | last_data = data; | |
193 | last_write = val; | |
194 | break; | |
195 | ||
196 | default: | |
197 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
198 | ret = -1; | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | if (nread || (*writepos != prev_data)) | |
204 | writepos++; | |
205 | } | |
206 | ||
207 | if (nread) | |
208 | { | |
209 | DPRINTF("writing %d bytes\n", writepos-writebuf); | |
210 | for (i=0; i<writepos-writebuf; i++) { | |
211 | ftdi_write_data(&ftdic, writebuf+i, 1); | |
212 | ||
213 | if (i > 0 && tr[i].cmdTrans == PP_WRITE && tr[i-1].cmdTrans == PP_READ) | |
214 | ftdi_read_pins(&ftdic, readbuf+i); | |
215 | } | |
216 | ||
217 | #ifdef DEBUG | |
218 | DPRINTF("write: "); | |
219 | hexdump(writebuf, writepos-writebuf); | |
220 | DPRINTF("read: "); | |
221 | hexdump(readbuf, i); | |
222 | #endif | |
223 | ||
224 | writepos = writebuf; | |
225 | } else { | |
226 | return ret; | |
227 | } | |
228 | ||
229 | readpos = readbuf; | |
230 | ||
231 | for (i = 0; i < num; i++) { | |
232 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
233 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
234 | tr[i].fAutoinc, tr[i].dwOptions); | |
235 | ||
236 | port = (unsigned long)tr[i].dwPort; | |
237 | val = tr[i].Data.Byte; | |
238 | readpos++; | |
239 | ||
240 | if (port == ppbase + PP_DATA) { | |
241 | if (tr[i].cmdTrans == PP_WRITE) { | |
242 | last_write = val; | |
243 | } | |
244 | } else if (port == ppbase + PP_STATUS) { | |
245 | DPRINTF("status port (last write: 0x%x)\n", last_write); | |
246 | switch(tr[i].cmdTrans) { | |
247 | case PP_READ: | |
248 | data = *readpos; | |
249 | #ifdef DEBUG | |
250 | DPRINTF("READ: 0x%x\n", data); | |
251 | jtagkey_state(data); | |
252 | #endif | |
253 | ||
254 | val = 0x00; | |
255 | if ((data & JTAGKEY_TDO) && (last_write & PP_PROG)) | |
256 | val |= PP_TDO; | |
257 | ||
258 | if (!(last_write & PP_PROG)) | |
259 | val |= 0x08; | |
260 | ||
261 | if (last_write & 0x40) | |
262 | val |= 0x20; | |
263 | else | |
264 | val |= 0x80; | |
265 | break; | |
266 | ||
267 | case PP_WRITE: | |
268 | ret = 0; /* Status Port is readonly */ | |
269 | break; | |
270 | ||
271 | default: | |
272 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
273 | ret = -1; | |
274 | break; | |
275 | } | |
276 | } else { | |
277 | ret = 0; | |
278 | } | |
279 | ||
280 | tr[i].Data.Byte = val; | |
281 | ||
282 | DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
283 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
284 | tr[i].fAutoinc, tr[i].dwOptions); | |
285 | #ifdef DEBUG | |
286 | if (tr[i].cmdTrans == 10) | |
287 | DPRINTF("read byte: %d\n", tr[i].Data.Byte); | |
288 | #endif | |
289 | } | |
290 | ||
291 | return ret; | |
292 | } |