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1 | #include <stdio.h> | |
2 | #include <ftdi.h> | |
3 | #include "usb-driver.h" | |
4 | #include "jtagkey.h" | |
5 | ||
6 | static struct ftdi_context ftdic; | |
7 | ||
8 | int jtagkey_init(unsigned short vid, unsigned short pid) { | |
9 | int ret = 0; | |
10 | ||
11 | if ((ret = ftdi_init(&ftdic)) != 0) { | |
12 | fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
13 | return ret; | |
14 | } | |
15 | ||
16 | if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) { | |
17 | fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
18 | return ret; | |
19 | } | |
20 | ||
21 | if ((ret = ftdi_usb_reset(&ftdic)) != 0) { | |
22 | fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
23 | return ret; | |
24 | } | |
25 | ||
26 | if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) { | |
27 | fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
28 | return ret; | |
29 | } | |
30 | ||
31 | #if 0 | |
32 | if ((ret = ftdi_write_data_set_chunksize(&ftdic, 3)) != 0) { | |
33 | fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
34 | return ret; | |
35 | } | |
36 | #endif | |
37 | ||
38 | if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { | |
39 | fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
40 | return ret; | |
41 | } | |
42 | ||
43 | if ((ret = ftdi_set_baudrate(&ftdic, 1000000)) != 0) { | |
44 | fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
45 | return ret; | |
46 | } | |
47 | ||
48 | if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) { | |
49 | fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
50 | return ret; | |
51 | } | |
52 | ||
53 | if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { | |
54 | fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
55 | return ret; | |
56 | } | |
57 | ||
58 | return ret; | |
59 | } | |
60 | ||
61 | void jtagkey_close() { | |
62 | ftdi_disable_bitbang(&ftdic); | |
63 | ftdi_usb_close(&ftdic); | |
64 | ftdi_deinit(&ftdic); | |
65 | } | |
66 | ||
67 | void jtagkey_state(unsigned char data) { | |
68 | fprintf(stderr,"Pins high: "); | |
69 | ||
70 | if (data & JTAGKEY_TCK) | |
71 | fprintf(stderr,"TCK "); | |
72 | ||
73 | if (data & JTAGKEY_TDI) | |
74 | fprintf(stderr,"TDI "); | |
75 | ||
76 | if (data & JTAGKEY_TDO) | |
77 | fprintf(stderr,"TDO "); | |
78 | ||
79 | if (data & JTAGKEY_TMS) | |
80 | fprintf(stderr,"TMS "); | |
81 | ||
82 | if (data & JTAGKEY_VREF) | |
83 | fprintf(stderr,"VREF "); | |
84 | ||
85 | fprintf(stderr,"\n"); | |
86 | } | |
87 | ||
88 | int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { | |
89 | int ret = 0; | |
90 | int i; | |
91 | unsigned long port; | |
92 | unsigned char val; | |
93 | static unsigned char last_write = 0, last_data = 0; | |
94 | unsigned char data; | |
95 | unsigned char writebuf[4096], readbuf[4096], *pos; | |
96 | ||
97 | pos = writebuf; | |
98 | for (i = 0; i < num; i++) { | |
99 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
100 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
101 | tr[i].fAutoinc, tr[i].dwOptions); | |
102 | ||
103 | port = (unsigned long)tr[i].dwPort; | |
104 | val = tr[i].Data.Byte; | |
105 | ||
106 | #ifdef DEBUG | |
107 | if (tr[i].cmdTrans == 13) | |
108 | DPRINTF("write byte: %d\n", val); | |
109 | #endif | |
110 | ||
111 | /* Pad writebuf for read-commands in stream */ | |
112 | if (tr[i].cmdTrans == 10) { | |
113 | *pos = last_data; | |
114 | pos++; | |
115 | } | |
116 | ||
117 | if (port == ppbase + PP_DATA) { | |
118 | DPRINTF("data port\n"); | |
119 | ||
120 | data = 0x00; | |
121 | switch(tr[i].cmdTrans) { | |
122 | case PP_READ: | |
123 | ret = 0; /* We don't support reading of the data port */ | |
124 | break; | |
125 | ||
126 | case PP_WRITE: | |
127 | if (val & PP_TDI) { | |
128 | data |= JTAGKEY_TDI; | |
129 | DPRINTF("TDI\n"); | |
130 | } else { | |
131 | DPRINTF("!TDI\n"); | |
132 | } | |
133 | if (val & PP_TCK) { | |
134 | data |= JTAGKEY_TCK; | |
135 | DPRINTF("TCK\n"); | |
136 | } else { | |
137 | DPRINTF("!TCK\n"); | |
138 | } | |
139 | if (val & PP_TMS) { | |
140 | data |= JTAGKEY_TMS; | |
141 | DPRINTF("TMS\n"); | |
142 | } else { | |
143 | DPRINTF("!TMS\n"); | |
144 | } | |
145 | if (val & PP_CTRL) { | |
146 | data |= JTAGKEY_OEn; | |
147 | DPRINTF("CTRL\n"); | |
148 | } else { | |
149 | DPRINTF("!CTRL\n"); | |
150 | } | |
151 | *pos = data; | |
152 | pos++; | |
153 | ||
154 | last_write = val; | |
155 | last_data = data; | |
156 | break; | |
157 | ||
158 | default: | |
159 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
160 | ret = -1; | |
161 | break; | |
162 | } | |
163 | } | |
164 | } | |
165 | ||
166 | ftdi_usb_purge_buffers(&ftdic); | |
167 | ftdi_write_data(&ftdic, writebuf, pos-writebuf); | |
168 | ||
169 | i = 0; | |
170 | do { | |
171 | #if 0 | |
172 | ftdi_write_data(&ftdic, &last_data, 1); | |
173 | #endif | |
174 | i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf)); | |
175 | } while (i < pos-writebuf); | |
176 | ||
177 | #ifdef DEBUG | |
178 | DPRINTF("write: "); | |
179 | hexdump(writebuf, pos-writebuf); | |
180 | DPRINTF("read: "); | |
181 | hexdump(readbuf, i); | |
182 | #endif | |
183 | ||
184 | pos = readbuf; | |
185 | ||
186 | for (i = 0; i < num; i++) { | |
187 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
188 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
189 | tr[i].fAutoinc, tr[i].dwOptions); | |
190 | ||
191 | port = (unsigned long)tr[i].dwPort; | |
192 | val = tr[i].Data.Byte; | |
193 | pos++; | |
194 | ||
195 | if (port == ppbase + PP_STATUS) { | |
196 | DPRINTF("status port (last write: %d)\n", last_write); | |
197 | switch(tr[i].cmdTrans) { | |
198 | case PP_READ: | |
199 | data = *pos; | |
200 | #ifdef DEBUG | |
201 | DPRINTF("READ: 0x%x\n", data); | |
202 | jtagkey_state(data); | |
203 | #endif | |
204 | ||
205 | val = 0x00; | |
206 | if (data & JTAGKEY_TDO) | |
207 | val |= PP_TDO; | |
208 | ||
209 | if (last_write & 0x40) | |
210 | val |= 0x20; | |
211 | else | |
212 | val |= 0x80; | |
213 | break; | |
214 | ||
215 | case PP_WRITE: | |
216 | ret = 0; /* Status Port is readonly */ | |
217 | break; | |
218 | ||
219 | default: | |
220 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
221 | ret = -1; | |
222 | break; | |
223 | } | |
224 | } else { | |
225 | ret = 0; | |
226 | } | |
227 | ||
228 | tr[i].Data.Byte = val; | |
229 | ||
230 | DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
231 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
232 | tr[i].fAutoinc, tr[i].dwOptions); | |
233 | #ifdef DEBUG | |
234 | if (tr[i].cmdTrans == 10) | |
235 | DPRINTF("read byte: %d\n", tr[i].Data.Byte); | |
236 | #endif | |
237 | } | |
238 | ||
239 | return ret; | |
240 | } |