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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 384 | |
7 | ||
8 | static struct ftdi_context ftdic; | |
9 | ||
10 | int jtagkey_init(unsigned short vid, unsigned short pid) { | |
11 | int ret = 0; | |
12 | unsigned char c; | |
13 | ||
14 | if ((ret = ftdi_init(&ftdic)) != 0) { | |
15 | fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
16 | return ret; | |
17 | } | |
18 | ||
19 | if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) { | |
20 | fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
21 | return ret; | |
22 | } | |
23 | ||
24 | if ((ret = ftdi_usb_reset(&ftdic)) != 0) { | |
25 | fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
26 | return ret; | |
27 | } | |
28 | ||
29 | if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) { | |
30 | fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
31 | return ret; | |
32 | } | |
33 | ||
34 | #if 0 | |
35 | if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1)) != 0) { | |
36 | fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
37 | return ret; | |
38 | } | |
39 | #endif | |
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_SYNCBB)) != 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 | DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num); | |
114 | ||
115 | ftdi_write_data(&ftdic, writebuf, writepos-writebuf); | |
116 | ||
117 | i = 0; | |
118 | while (i < writepos-writebuf) { | |
119 | i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf)); | |
120 | } | |
121 | DPRINTF("read %d/%d bytes\n", i, writepos-writebuf); | |
122 | writepos = writebuf; | |
123 | } | |
124 | ||
125 | for (i = 0; i < num; i++) { | |
126 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
127 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
128 | tr[i].fAutoinc, tr[i].dwOptions); | |
129 | ||
130 | port = (unsigned long)tr[i].dwPort; | |
131 | val = tr[i].Data.Byte; | |
132 | ||
133 | #ifdef DEBUG | |
134 | if (tr[i].cmdTrans == 13) | |
135 | DPRINTF("write byte: %d\n", val); | |
136 | #endif | |
137 | ||
138 | /* Pad writebuf for read-commands in stream */ | |
139 | *writepos = last_data; | |
140 | prev_data = last_data; | |
141 | ||
142 | if (port == ppbase + PP_DATA) { | |
143 | DPRINTF("data port\n"); | |
144 | ||
145 | data = 0x00; | |
146 | switch(tr[i].cmdTrans) { | |
147 | case PP_READ: | |
148 | ret = 0; /* We don't support reading of the data port */ | |
149 | break; | |
150 | ||
151 | case PP_WRITE: | |
152 | if (val & PP_TDI) { | |
153 | data |= JTAGKEY_TDI; | |
154 | DPRINTF("TDI\n"); | |
155 | } else { | |
156 | DPRINTF("!TDI\n"); | |
157 | } | |
158 | if (val & PP_TCK) { | |
159 | data |= JTAGKEY_TCK; | |
160 | DPRINTF("TCK\n"); | |
161 | } else { | |
162 | DPRINTF("!TCK\n"); | |
163 | } | |
164 | if (val & PP_TMS) { | |
165 | data |= JTAGKEY_TMS; | |
166 | DPRINTF("TMS\n"); | |
167 | } else { | |
168 | DPRINTF("!TMS\n"); | |
169 | } | |
170 | if (val & PP_CTRL) { | |
171 | data = JTAGKEY_OEn; | |
172 | DPRINTF("CTRL\n"); | |
173 | } else { | |
174 | DPRINTF("!CTRL\n"); | |
175 | } | |
176 | ||
177 | if (val & PP_PROG) { | |
178 | DPRINTF("PROG\n"); | |
179 | } else { | |
180 | DPRINTF("!PROG\n"); | |
181 | } | |
182 | ||
183 | *writepos = data; | |
184 | ||
185 | last_data = data; | |
186 | last_write = val; | |
187 | break; | |
188 | ||
189 | default: | |
190 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
191 | ret = -1; | |
192 | break; | |
193 | } | |
194 | } | |
195 | ||
196 | if (nread || (*writepos != prev_data)) | |
197 | writepos++; | |
198 | } | |
199 | ||
200 | if (nread) | |
201 | { | |
202 | DPRINTF("writing %d bytes\n", writepos-writebuf); | |
203 | ftdi_write_data(&ftdic, writebuf, writepos-writebuf); | |
204 | DPRINTF("reading %d bytes\n", writepos-writebuf); | |
205 | ||
206 | i = 0; | |
207 | while (i < writepos-writebuf) { | |
208 | i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf)); | |
209 | } | |
210 | DPRINTF("read %d bytes\n", i); | |
211 | ||
212 | #ifdef DEBUG | |
213 | DPRINTF("write: "); | |
214 | hexdump(writebuf, writepos-writebuf); | |
215 | DPRINTF("read: "); | |
216 | hexdump(readbuf, i); | |
217 | #endif | |
218 | ||
219 | writepos = writebuf; | |
220 | } else { | |
221 | return ret; | |
222 | } | |
223 | ||
224 | readpos = readbuf; | |
225 | readpos += 0; | |
226 | ||
227 | for (i = 0; i < num; i++) { | |
228 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
229 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
230 | tr[i].fAutoinc, tr[i].dwOptions); | |
231 | ||
232 | port = (unsigned long)tr[i].dwPort; | |
233 | val = tr[i].Data.Byte; | |
234 | readpos++; | |
235 | ||
236 | if (port == ppbase + PP_DATA) { | |
237 | if (tr[i].cmdTrans == PP_WRITE) { | |
238 | last_write = val; | |
239 | } | |
240 | } else if (port == ppbase + PP_STATUS) { | |
241 | DPRINTF("status port (last write: 0x%x)\n", last_write); | |
242 | switch(tr[i].cmdTrans) { | |
243 | case PP_READ: | |
244 | data = *readpos; | |
245 | #ifdef DEBUG | |
246 | DPRINTF("READ: 0x%x\n", data); | |
247 | jtagkey_state(data); | |
248 | #endif | |
249 | ||
250 | val = 0x00; | |
251 | if ((data & JTAGKEY_TDO) && (last_write & PP_PROG)) | |
252 | val |= PP_TDO; | |
253 | ||
254 | if (!(last_write & PP_PROG)) | |
255 | val |= 0x08; | |
256 | ||
257 | if (last_write & 0x40) | |
258 | val |= 0x20; | |
259 | else | |
260 | val |= 0x80; | |
261 | break; | |
262 | ||
263 | case PP_WRITE: | |
264 | ret = 0; /* Status Port is readonly */ | |
265 | break; | |
266 | ||
267 | default: | |
268 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
269 | ret = -1; | |
270 | break; | |
271 | } | |
272 | } else { | |
273 | ret = 0; | |
274 | } | |
275 | ||
276 | tr[i].Data.Byte = val; | |
277 | ||
278 | DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
279 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
280 | tr[i].fAutoinc, tr[i].dwOptions); | |
281 | #ifdef DEBUG | |
282 | if (tr[i].cmdTrans == 10) | |
283 | DPRINTF("read byte: %d\n", tr[i].Data.Byte); | |
284 | #endif | |
285 | } | |
286 | ||
287 | return ret; | |
288 | } |