]> cvs.zerfleddert.de Git - usb-driver/blob - jtagkey.c
unify parallel and jtagkey interface
[usb-driver] / jtagkey.c
1 #include <stdio.h>
2 #include <ftdi.h>
3 #include <unistd.h>
4 #include "usb-driver.h"
5 #include "config.h"
6 #include "jtagkey.h"
7
8 #define USBBUFSIZE 4096
9
10 static struct ftdi_context ftdic;
11 static unsigned int usb_maxlen = 0;
12 static unsigned char bitbang_mode;
13
14 static int jtagkey_init(unsigned short vid, unsigned short pid) {
15 int ret = 0;
16 unsigned char c;
17
18 if ((ret = ftdi_init(&ftdic)) != 0) {
19 fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
20 return ret;
21 }
22
23 if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
24 fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
25 return ret;
26 }
27
28 if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
29 fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
30 return ret;
31 }
32
33 if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
34 fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
35 return ret;
36 }
37
38
39 if ((ret = ftdi_write_data_get_chunksize(&ftdic, &usb_maxlen)) != 0) {
40 fprintf(stderr, "unable to get write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
41 return ret;
42 }
43
44 if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) {
45 fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
46 return ret;
47 }
48
49 if ((ret = ftdi_set_baudrate(&ftdic, 500000)) != 0) {
50 fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
51 return ret;
52 }
53
54 c = 0x00;
55 ftdi_write_data(&ftdic, &c, 1);
56
57 if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_BITBANG)) != 0) {
58 fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
59 return ret;
60 }
61
62 bitbang_mode = BITMODE_BITBANG;
63
64 if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
65 fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
66 return ret;
67 }
68
69 return ret;
70 }
71
72 int jtagkey_open(int num) {
73 int ret;
74
75 ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num));
76
77 if (ret >= 0)
78 ret = 0xff;
79
80 return ret;
81 }
82
83 void jtagkey_close(int handle) {
84 if (handle == 0xff) {
85 ftdi_disable_bitbang(&ftdic);
86 ftdi_usb_close(&ftdic);
87 ftdi_deinit(&ftdic);
88 }
89 }
90
91 static int jtagkey_set_bbmode(unsigned char mode) {
92 int ret = 0;
93
94 if (bitbang_mode != mode) {
95 DPRINTF("switching bitbang-mode!\n");
96
97 /* Wait for the latency-timer to kick in */
98 usleep(2);
99 if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, mode)) != 0) {
100 fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
101 return ret;
102 }
103 if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
104 fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
105 return ret;
106 }
107 /* Wait for the FTDI2232 to settle */
108 usleep(2);
109
110 bitbang_mode = mode;
111 }
112
113 return ret;
114 }
115
116 void jtagkey_state(unsigned char data) {
117 fprintf(stderr,"Pins high: ");
118
119 if (data & JTAGKEY_TCK)
120 fprintf(stderr,"TCK ");
121
122 if (data & JTAGKEY_TDI)
123 fprintf(stderr,"TDI ");
124
125 if (data & JTAGKEY_TDO)
126 fprintf(stderr,"TDO ");
127
128 if (data & JTAGKEY_TMS)
129 fprintf(stderr,"TMS ");
130
131 if (data & JTAGKEY_VREF)
132 fprintf(stderr,"VREF ");
133
134 fprintf(stderr,"\n");
135 }
136
137 int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
138 int ret = 0;
139 int i;
140 int nread = 0;
141 unsigned long port;
142 unsigned char val;
143 static unsigned char last_data = 0;
144 static unsigned char last_write = 0x00;
145 static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
146 static unsigned char readbuf[USBBUFSIZE], *readpos;
147 unsigned char data, prev_data;
148
149 /* Count reads */
150 for (i = 0; i < num; i++)
151 if (tr[i].cmdTrans == PP_READ)
152 nread++;
153
154 /* Write combining */
155 if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) {
156 unsigned char *pos = writebuf;
157 int len;
158 DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
159
160 jtagkey_set_bbmode(BITMODE_BITBANG);
161 while (pos < writepos) {
162 len = writepos-pos;
163
164 if (len > usb_maxlen)
165 len = usb_maxlen;
166
167 DPRINTF("combined write of %d/%d\n",len,writepos-pos);
168 ftdi_write_data(&ftdic, pos, len);
169 pos += len;
170 }
171
172 writepos = writebuf;
173 }
174
175 for (i = 0; i < num; i++) {
176 DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
177 (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
178 tr[i].fAutoinc, tr[i].dwOptions);
179
180 port = (unsigned long)tr[i].dwPort;
181 val = tr[i].Data.Byte;
182
183 #ifdef DEBUG
184 if (tr[i].cmdTrans == 13)
185 DPRINTF("write byte: %d\n", val);
186 #endif
187
188 /* Pad writebuf for read-commands in stream */
189 *writepos = last_data;
190 prev_data = last_data;
191
192 if (port == ppbase + PP_DATA) {
193 DPRINTF("data port\n");
194
195 data = 0x00;
196 switch(tr[i].cmdTrans) {
197 case PP_READ:
198 ret = 0; /* We don't support reading of the data port */
199 break;
200
201 case PP_WRITE:
202 if (val & PP_TDI) {
203 data |= JTAGKEY_TDI;
204 DPRINTF("TDI\n");
205 } else {
206 DPRINTF("!TDI\n");
207 }
208 if (val & PP_TCK) {
209 data |= JTAGKEY_TCK;
210 DPRINTF("TCK\n");
211 } else {
212 DPRINTF("!TCK\n");
213 }
214 if (val & PP_TMS) {
215 data |= JTAGKEY_TMS;
216 DPRINTF("TMS\n");
217 } else {
218 DPRINTF("!TMS\n");
219 }
220 if (val & PP_CTRL) {
221 data = JTAGKEY_OEn;
222 DPRINTF("CTRL\n");
223 } else {
224 DPRINTF("!CTRL\n");
225 }
226
227 if (val & PP_PROG) {
228 DPRINTF("PROG\n");
229 } else {
230 DPRINTF("!PROG\n");
231 }
232
233 *writepos = data;
234
235 last_data = data;
236 last_write = val;
237 break;
238
239 default:
240 fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
241 ret = -1;
242 break;
243 }
244 }
245
246 if (nread || (*writepos != prev_data))
247 writepos++;
248 }
249
250 if (nread)
251 {
252 DPRINTF("writing %d bytes\n", writepos-writebuf);
253
254 *writepos = last_data;
255 writepos++;
256
257 jtagkey_set_bbmode(BITMODE_SYNCBB);
258 ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
259
260 i = 0;
261 while (i < writepos-writebuf) {
262 i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
263 }
264
265 #ifdef DEBUG
266 DPRINTF("write: ");
267 hexdump(writebuf, writepos-writebuf);
268 DPRINTF("read: ");
269 hexdump(readbuf, i);
270 #endif
271
272 writepos = writebuf;
273 } else {
274 return ret;
275 }
276
277 readpos = readbuf;
278
279 for (i = 0; i < num; i++) {
280 DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
281 (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
282 tr[i].fAutoinc, tr[i].dwOptions);
283
284 port = (unsigned long)tr[i].dwPort;
285 val = tr[i].Data.Byte;
286 readpos++;
287
288 if (port == ppbase + PP_DATA) {
289 if (tr[i].cmdTrans == PP_WRITE) {
290 last_write = val;
291 }
292 } else if (port == ppbase + PP_STATUS) {
293 DPRINTF("status port (last write: 0x%x)\n", last_write);
294 switch(tr[i].cmdTrans) {
295 case PP_READ:
296 data = *readpos;
297
298 #ifdef DEBUG
299 DPRINTF("READ: 0x%x\n", data);
300 jtagkey_state(data);
301 #endif
302
303 val = 0x00;
304 if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
305 val |= PP_TDO;
306
307 if (!(last_write & PP_PROG))
308 val |= 0x08;
309
310 if (last_write & 0x40)
311 val |= 0x20;
312 else
313 val |= 0x80;
314 break;
315
316 case PP_WRITE:
317 ret = 0; /* Status Port is readonly */
318 break;
319
320 default:
321 fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
322 ret = -1;
323 break;
324 }
325 } else {
326 ret = 0;
327 }
328
329 tr[i].Data.Byte = val;
330
331 DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
332 (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
333 tr[i].fAutoinc, tr[i].dwOptions);
334 #ifdef DEBUG
335 if (tr[i].cmdTrans == 10)
336 DPRINTF("read byte: %d\n", tr[i].Data.Byte);
337 #endif
338 }
339
340 return ret;
341 }
Impressum, Datenschutz