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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 ((ret = ftdi_write_data_set_chunksize(&ftdic, 1)) != 0) { | |
32 | fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
33 | return ret; | |
34 | } | |
35 | ||
36 | if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { | |
37 | fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | if ((ret = ftdi_set_baudrate(&ftdic, 230400)) != 0) { | |
42 | fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
43 | return ret; | |
44 | } | |
45 | ||
46 | if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, 1)) != 0) { | |
47 | fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
48 | return ret; | |
49 | } | |
50 | ||
51 | if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { | |
52 | fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); | |
53 | return ret; | |
54 | } | |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
59 | void jtagkey_close() { | |
60 | ftdi_disable_bitbang(&ftdic); | |
61 | ftdi_usb_close(&ftdic); | |
62 | ftdi_deinit(&ftdic); | |
63 | } | |
64 | ||
65 | void jtagkey_state(unsigned char data) { | |
66 | fprintf(stderr,"Pins high: "); | |
67 | ||
68 | if (data & JTAGKEY_TCK) | |
69 | fprintf(stderr,"TCK "); | |
70 | ||
71 | if (data & JTAGKEY_TDI) | |
72 | fprintf(stderr,"TDI "); | |
73 | ||
74 | if (data & JTAGKEY_TDO) | |
75 | fprintf(stderr,"TDO "); | |
76 | ||
77 | if (data & JTAGKEY_TMS) | |
78 | fprintf(stderr,"TMS "); | |
79 | ||
80 | if (data & JTAGKEY_VREF) | |
81 | fprintf(stderr,"VREF "); | |
82 | ||
83 | fprintf(stderr,"\n"); | |
84 | } | |
85 | ||
86 | int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { | |
87 | int ret = 0; | |
88 | int i; | |
89 | unsigned long port; | |
90 | unsigned char val; | |
91 | static unsigned char last_write = 0; | |
92 | unsigned char data; | |
93 | ||
94 | for (i = 0; i < num; i++) { | |
95 | DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
96 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
97 | tr[i].fAutoinc, tr[i].dwOptions); | |
98 | ||
99 | port = (unsigned long)tr[i].dwPort; | |
100 | val = tr[i].Data.Byte; | |
101 | ||
102 | #ifdef DEBUG | |
103 | if (tr[i].cmdTrans == 13) | |
104 | DPRINTF("write byte: %d\n", val); | |
105 | #endif | |
106 | ||
107 | if (port == ppbase + PP_DATA) { | |
108 | DPRINTF("data port\n"); | |
109 | ||
110 | data = 0x00; | |
111 | switch(tr[i].cmdTrans) { | |
112 | case PP_READ: | |
113 | ret = 0; /* We don't support reading of the data port */ | |
114 | break; | |
115 | ||
116 | case PP_WRITE: | |
117 | if (val & PP_TDI) { | |
118 | data |= JTAGKEY_TDI; | |
119 | DPRINTF("TDI\n"); | |
120 | } else { | |
121 | DPRINTF("!TDI\n"); | |
122 | } | |
123 | if (val & PP_TCK) { | |
124 | data |= JTAGKEY_TCK; | |
125 | DPRINTF("TCK\n"); | |
126 | } else { | |
127 | DPRINTF("!TCK\n"); | |
128 | } | |
129 | if (val & PP_TMS) { | |
130 | data |= JTAGKEY_TMS; | |
131 | DPRINTF("TMS\n"); | |
132 | } else { | |
133 | DPRINTF("!TMS\n"); | |
134 | } | |
135 | if (val & PP_CTRL) { | |
136 | data |= JTAGKEY_OEn; | |
137 | DPRINTF("CTRL\n"); | |
138 | } else { | |
139 | DPRINTF("!CTRL\n"); | |
140 | } | |
141 | ftdi_write_data(&ftdic, &data, 1); | |
142 | ||
143 | #if 0 | |
144 | do { | |
145 | ftdi_read_pins(&ftdic, &tmp); | |
146 | } while ((tmp & (JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_TCK|JTAGKEY_TDI)) != data); | |
147 | #endif | |
148 | ||
149 | last_write = val; | |
150 | break; | |
151 | ||
152 | default: | |
153 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
154 | ret = -1; | |
155 | break; | |
156 | } | |
157 | } else if (port == ppbase + PP_STATUS) { | |
158 | DPRINTF("status port (last write: %d)\n", last_write); | |
159 | switch(tr[i].cmdTrans) { | |
160 | case PP_READ: | |
161 | ftdi_read_pins(&ftdic, &data); | |
162 | #ifdef DEBUG | |
163 | DPRINTF("READ: 0x%x\n", data); | |
164 | jtagkey_state(data); | |
165 | #endif | |
166 | ||
167 | val = 0x00; | |
168 | if (data & JTAGKEY_TDO) | |
169 | val |= PP_TDO; | |
170 | ||
171 | if (last_write & 0x40) | |
172 | val |= 0x20; | |
173 | else | |
174 | val |= 0x80; | |
175 | break; | |
176 | ||
177 | case PP_WRITE: | |
178 | ret = 0; /* Status Port is readonly */ | |
179 | break; | |
180 | ||
181 | default: | |
182 | fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); | |
183 | ret = -1; | |
184 | break; | |
185 | } | |
186 | } else if (port == ppbase + PP_CONTROL) { | |
187 | DPRINTF("control port\n"); | |
188 | } else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) { | |
189 | DPRINTF("ECP_CFGA port\n"); | |
190 | } else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) { | |
191 | DPRINTF("ECP_CFGB port\n"); | |
192 | } else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) { | |
193 | DPRINTF("ECP_ECR port\n"); | |
194 | } else { | |
195 | DPRINTF("access to unsupported address range!\n"); | |
196 | ret = 0; | |
197 | } | |
198 | ||
199 | tr[i].Data.Byte = val; | |
200 | ||
201 | DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", | |
202 | (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, | |
203 | tr[i].fAutoinc, tr[i].dwOptions); | |
204 | #ifdef DEBUG | |
205 | if (tr[i].cmdTrans == 10) | |
206 | DPRINTF("read byte: %d\n", tr[i].Data.Byte); | |
207 | #endif | |
208 | } | |
209 | ||
210 | return ret; | |
211 | } |