jtag: set default "jtag_only" to uninitialized transports
[openocd.git] / src / jtag / drivers / gw16012.c
1 /***************************************************************************
2 * Copyright (C) 2006 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
17 ***************************************************************************/
18
19 #ifdef HAVE_CONFIG_H
20 #include "config.h"
21 #endif
22
23 #include <jtag/interface.h>
24 #include <jtag/commands.h>
25
26 #if 1
27 #define _DEBUG_GW16012_IO_
28 #endif
29
30 /* system includes */
31 /* -ino: 060521-1036 */
32 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
33
34 #include <machine/sysarch.h>
35 #include <machine/cpufunc.h>
36 #define ioperm(startport, length, enable) \
37 386_set_ioperm((startport), (length), (enable))
38
39 #else
40
41 #endif /* __FreeBSD__, __FreeBSD_kernel__ */
42
43 #if PARPORT_USE_PPDEV == 1
44 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
45 #include <dev/ppbus/ppi.h>
46 #include <dev/ppbus/ppbconf.h>
47 #define PPRSTATUS PPIGSTATUS
48 #define PPWDATA PPISDATA
49 #else
50 #include <linux/parport.h>
51 #include <linux/ppdev.h>
52 #endif
53 #include <fcntl.h>
54 #include <sys/ioctl.h>
55 #else /* not PARPORT_USE_PPDEV */
56 #ifndef _WIN32
57 #include <sys/io.h>
58 #endif
59 #endif
60
61 #if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1
62 #include <windows.h>
63 #endif
64
65 /* configuration */
66 uint16_t gw16012_port;
67
68 /* interface variables
69 */
70 static uint8_t gw16012_msb;
71 static uint8_t gw16012_control_value;
72
73 #if PARPORT_USE_PPDEV == 1
74 static int device_handle;
75 #endif
76
77 static void gw16012_data(uint8_t value)
78 {
79 value = (value & 0x7f) | gw16012_msb;
80 gw16012_msb ^= 0x80; /* toggle MSB */
81
82 #ifdef _DEBUG_GW16012_IO_
83 LOG_DEBUG("%2.2x", value);
84 #endif
85
86 #if PARPORT_USE_PPDEV == 1
87 ioctl(device_handle, PPWDATA, &value);
88 #else
89 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
90 outb(gw16012_port, value);
91 #else
92 outb(value, gw16012_port);
93 #endif
94 #endif
95 }
96
97 static void gw16012_control(uint8_t value)
98 {
99 if (value != gw16012_control_value) {
100 gw16012_control_value = value;
101
102 #ifdef _DEBUG_GW16012_IO_
103 LOG_DEBUG("%2.2x", gw16012_control_value);
104 #endif
105
106 #if PARPORT_USE_PPDEV == 1
107 ioctl(device_handle, PPWCONTROL, &gw16012_control_value);
108 #else
109 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
110 outb(gw16012_port + 2, gw16012_control_value);
111 #else
112 outb(gw16012_control_value, gw16012_port + 2);
113 #endif
114 #endif
115 }
116 }
117
118 static void gw16012_input(uint8_t *value)
119 {
120 #if PARPORT_USE_PPDEV == 1
121 ioctl(device_handle, PPRSTATUS, value);
122 #else
123 *value = inb(gw16012_port + 1);
124 #endif
125
126 #ifdef _DEBUG_GW16012_IO_
127 LOG_DEBUG("%2.2x", *value);
128 #endif
129 }
130
131 /* (1) assert or (0) deassert reset lines */
132 static void gw16012_reset(int trst, int srst)
133 {
134 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
135
136 if (trst == 0)
137 gw16012_control(0x0d);
138 else if (trst == 1)
139 gw16012_control(0x0c);
140
141 if (srst == 0)
142 gw16012_control(0x0a);
143 else if (srst == 1)
144 gw16012_control(0x0b);
145 }
146
147 static void gw16012_end_state(tap_state_t state)
148 {
149 if (tap_is_state_stable(state))
150 tap_set_end_state(state);
151 else {
152 LOG_ERROR("BUG: %i is not a valid end state", state);
153 exit(-1);
154 }
155 }
156
157 static void gw16012_state_move(void)
158 {
159 int i = 0, tms = 0;
160 uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
161 int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
162
163 gw16012_control(0x0); /* single-bit mode */
164
165 for (i = 0; i < tms_count; i++) {
166 tms = (tms_scan >> i) & 1;
167 gw16012_data(tms << 1); /* output next TMS bit */
168 }
169
170 tap_set_state(tap_get_end_state());
171 }
172
173 static void gw16012_path_move(struct pathmove_command *cmd)
174 {
175 int num_states = cmd->num_states;
176 int state_count;
177
178 state_count = 0;
179 while (num_states) {
180 gw16012_control(0x0); /* single-bit mode */
181 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
182 gw16012_data(0x0); /* TCK cycle with TMS low */
183 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
184 gw16012_data(0x2); /* TCK cycle with TMS high */
185 else {
186 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
187 tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
188 exit(-1);
189 }
190
191 tap_set_state(cmd->path[state_count]);
192 state_count++;
193 num_states--;
194 }
195
196 tap_set_end_state(tap_get_state());
197 }
198
199 static void gw16012_runtest(int num_cycles)
200 {
201 tap_state_t saved_end_state = tap_get_end_state();
202 int i;
203
204 /* only do a state_move when we're not already in IDLE */
205 if (tap_get_state() != TAP_IDLE) {
206 gw16012_end_state(TAP_IDLE);
207 gw16012_state_move();
208 }
209
210 for (i = 0; i < num_cycles; i++) {
211 gw16012_control(0x0); /* single-bit mode */
212 gw16012_data(0x0); /* TMS cycle with TMS low */
213 }
214
215 gw16012_end_state(saved_end_state);
216 if (tap_get_state() != tap_get_end_state())
217 gw16012_state_move();
218 }
219
220 static void gw16012_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
221 {
222 int bits_left = scan_size;
223 int bit_count = 0;
224 tap_state_t saved_end_state = tap_get_end_state();
225 uint8_t scan_out, scan_in;
226
227 /* only if we're not already in the correct Shift state */
228 if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) ||
229 (ir_scan && (tap_get_state() == TAP_IRSHIFT)))) {
230 if (ir_scan)
231 gw16012_end_state(TAP_IRSHIFT);
232 else
233 gw16012_end_state(TAP_DRSHIFT);
234
235 gw16012_state_move();
236 gw16012_end_state(saved_end_state);
237 }
238
239 while (type == SCAN_OUT && ((bits_left - 1) > 7)) {
240 gw16012_control(0x2); /* seven-bit mode */
241 scan_out = buf_get_u32(buffer, bit_count, 7);
242 gw16012_data(scan_out);
243 bit_count += 7;
244 bits_left -= 7;
245 }
246
247 gw16012_control(0x0); /* single-bit mode */
248 while (bits_left-- > 0) {
249 uint8_t tms = 0;
250
251 scan_out = buf_get_u32(buffer, bit_count, 1);
252
253 if (bits_left == 0) /* last bit */ {
254 if ((ir_scan && (tap_get_end_state() == TAP_IRSHIFT))
255 || (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))
256 tms = 0;
257 else
258 tms = 2;
259 }
260
261 gw16012_data(scan_out | tms);
262
263 if (type != SCAN_OUT) {
264 gw16012_input(&scan_in);
265 buf_set_u32(buffer, bit_count, 1, ((scan_in & 0x08) >> 3));
266 }
267
268 bit_count++;
269 }
270
271 if (!((ir_scan && (tap_get_end_state() == TAP_IRSHIFT)) ||
272 (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))) {
273 gw16012_data(0x0);
274 if (ir_scan)
275 tap_set_state(TAP_IRPAUSE);
276 else
277 tap_set_state(TAP_DRPAUSE);
278
279 if (tap_get_state() != tap_get_end_state())
280 gw16012_state_move();
281 }
282 }
283
284 static int gw16012_execute_queue(void)
285 {
286 struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
287 int scan_size;
288 enum scan_type type;
289 uint8_t *buffer;
290 int retval;
291
292 /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
293 * that wasn't handled by a caller-provided error handler
294 */
295 retval = ERROR_OK;
296
297 while (cmd) {
298 switch (cmd->type) {
299 case JTAG_RESET:
300 LOG_DEBUG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
301 if (cmd->cmd.reset->trst == 1)
302 tap_set_state(TAP_RESET);
303 gw16012_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
304 break;
305 case JTAG_RUNTEST:
306 LOG_DEBUG_IO("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles,
307 cmd->cmd.runtest->end_state);
308 gw16012_end_state(cmd->cmd.runtest->end_state);
309 gw16012_runtest(cmd->cmd.runtest->num_cycles);
310 break;
311 case JTAG_TLR_RESET:
312 LOG_DEBUG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
313 gw16012_end_state(cmd->cmd.statemove->end_state);
314 gw16012_state_move();
315 break;
316 case JTAG_PATHMOVE:
317 LOG_DEBUG_IO("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
318 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
319 gw16012_path_move(cmd->cmd.pathmove);
320 break;
321 case JTAG_SCAN:
322 gw16012_end_state(cmd->cmd.scan->end_state);
323 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
324 type = jtag_scan_type(cmd->cmd.scan);
325 LOG_DEBUG_IO("%s scan (%i) %i bit end in %i", (cmd->cmd.scan->ir_scan) ? "ir" : "dr",
326 type, scan_size, cmd->cmd.scan->end_state);
327 gw16012_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
328 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
329 retval = ERROR_JTAG_QUEUE_FAILED;
330 if (buffer)
331 free(buffer);
332 break;
333 case JTAG_SLEEP:
334 LOG_DEBUG_IO("sleep %i", cmd->cmd.sleep->us);
335 jtag_sleep(cmd->cmd.sleep->us);
336 break;
337 default:
338 LOG_ERROR("BUG: unknown JTAG command type encountered");
339 exit(-1);
340 }
341 cmd = cmd->next;
342 }
343
344 return retval;
345 }
346
347 #if PARPORT_USE_GIVEIO == 1
348 static int gw16012_get_giveio_access(void)
349 {
350 HANDLE h;
351 OSVERSIONINFO version;
352
353 version.dwOSVersionInfoSize = sizeof version;
354 if (!GetVersionEx(&version)) {
355 errno = EINVAL;
356 return -1;
357 }
358 if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
359 return 0;
360
361 h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING,
362 FILE_ATTRIBUTE_NORMAL, NULL);
363 if (h == INVALID_HANDLE_VALUE) {
364 errno = ENODEV;
365 return -1;
366 }
367
368 CloseHandle(h);
369
370 return 0;
371 }
372 #endif
373
374 #if PARPORT_USE_PPDEV == 1
375
376 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
377
378 #define GW16012_PPDEV_NAME "ppi"
379
380 static int gw16012_init_ioctls(void)
381 {
382 int temp = 0;
383 temp = ioctl(device_handle, PPCLAIM);
384 if (temp < 0) {
385 LOG_ERROR("cannot claim device");
386 return ERROR_JTAG_INIT_FAILED;
387 }
388
389 temp = PARPORT_MODE_COMPAT;
390 temp = ioctl(device_handle, PPSETMODE, &temp);
391 if (temp < 0) {
392 LOG_ERROR(" cannot set compatible mode to device");
393 return ERROR_JTAG_INIT_FAILED;
394 }
395
396 temp = IEEE1284_MODE_COMPAT;
397 temp = ioctl(device_handle, PPNEGOT, &temp);
398 if (temp < 0) {
399 LOG_ERROR("cannot set compatible 1284 mode to device");
400 return ERROR_JTAG_INIT_FAILED;
401 }
402 return ERROR_OK;
403 }
404 #else
405
406 #define GW16012_PPDEV_NAME "parport"
407
408 static int gw16012_init_ioctls(void)
409 {
410 return ERROR_OK;
411 }
412
413 #endif /* defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */
414
415 static int gw16012_init_device(void)
416 {
417 const char *device_name = GW16012_PPDEV_NAME;
418 char buffer[256];
419
420 if (device_handle > 0) {
421 LOG_ERROR("device is already opened");
422 return ERROR_JTAG_INIT_FAILED;
423 }
424
425 snprintf(buffer, 256, "/dev/%s%d", device_name, gw16012_port);
426 LOG_DEBUG("opening %s...", buffer);
427
428 device_handle = open(buffer, O_WRONLY);
429 if (device_handle < 0) {
430 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
431 return ERROR_JTAG_INIT_FAILED;
432 }
433
434 LOG_DEBUG("...open");
435
436 if (gw16012_init_ioctls() != ERROR_OK)
437 return ERROR_JTAG_INIT_FAILED;
438
439 return ERROR_OK;
440 }
441
442 #else /* PARPORT_USE_PPDEV */
443
444 static int gw16012_init_device(void)
445 {
446 if (gw16012_port == 0) {
447 gw16012_port = 0x378;
448 LOG_WARNING("No gw16012 port specified, using default '0x378' (LPT1)");
449 }
450
451 LOG_DEBUG("requesting privileges for parallel port 0x%lx...", (long unsigned)(gw16012_port));
452 #if PARPORT_USE_GIVEIO == 1
453 if (gw16012_get_giveio_access() != 0) {
454 #else /* PARPORT_USE_GIVEIO */
455 if (ioperm(gw16012_port, 3, 1) != 0) {
456 #endif /* PARPORT_USE_GIVEIO */
457 LOG_ERROR("missing privileges for direct i/o");
458 return ERROR_JTAG_INIT_FAILED;
459 }
460 LOG_DEBUG("...privileges granted");
461
462 /* make sure parallel port is in right mode (clear tristate and interrupt */
463 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
464 outb(gw16012_port + 2, 0x0);
465 #else
466 outb(0x0, gw16012_port + 2);
467 #endif
468 return ERROR_OK;
469 }
470
471 #endif /* PARPORT_USE_PPDEV */
472
473 static int gw16012_init(void)
474 {
475 uint8_t status_port;
476
477 if (gw16012_init_device() != ERROR_OK)
478 return ERROR_JTAG_INIT_FAILED;
479
480 gw16012_input(&status_port);
481 gw16012_msb = (status_port & 0x80) ^ 0x80;
482
483 gw16012_reset(0, 0);
484
485 return ERROR_OK;
486 }
487
488 static int gw16012_quit(void)
489 {
490
491 return ERROR_OK;
492 }
493
494 COMMAND_HANDLER(gw16012_handle_parport_port_command)
495 {
496 if (CMD_ARGC == 1) {
497 /* only if the port wasn't overwritten by cmdline */
498 if (gw16012_port == 0)
499 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], gw16012_port);
500 else {
501 LOG_ERROR("The parport port was already configured!");
502 return ERROR_FAIL;
503 }
504 }
505
506 command_print(CMD, "parport port = %u", gw16012_port);
507
508 return ERROR_OK;
509 }
510
511 static const struct command_registration gw16012_command_handlers[] = {
512 {
513 .name = "parport_port",
514 .handler = gw16012_handle_parport_port_command,
515 .mode = COMMAND_CONFIG,
516 .help = "Display the address of the I/O port (e.g. 0x378) "
517 "or the number of the '/dev/parport' device used. "
518 "If a parameter is provided, first change that port.",
519 .usage = "[port_number]",
520 },
521 COMMAND_REGISTRATION_DONE
522 };
523
524 struct jtag_interface gw16012_interface = {
525 .name = "gw16012",
526 .transports = jtag_only,
527 .commands = gw16012_command_handlers,
528
529 .init = gw16012_init,
530 .quit = gw16012_quit,
531 .execute_queue = gw16012_execute_queue,
532 };