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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Håvard Espeland <gus@ping.uio.no>, | |
5 | * Copyright (C) 2010 Martin Stensgård <mastensg@ping.uio.no> | |
6 | * Copyright (C) 2010 Carl Henrik Lunde <chlunde@ping.uio.no> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * ASIX Sigma Logic Analyzer Driver | |
24 | */ | |
25 | ||
26 | #include <ftdi.h> | |
27 | #include <string.h> | |
28 | #include <zlib.h> | |
29 | #include <sigrok.h> | |
30 | #include "asix-sigma.h" | |
31 | ||
32 | #define USB_VENDOR 0xa600 | |
33 | #define USB_PRODUCT 0xa000 | |
34 | #define USB_DESCRIPTION "ASIX SIGMA" | |
35 | #define USB_VENDOR_NAME "ASIX" | |
36 | #define USB_MODEL_NAME "SIGMA" | |
37 | #define USB_MODEL_VERSION "" | |
38 | #define TRIGGER_TYPES "rf" | |
39 | ||
40 | static GSList *device_instances = NULL; | |
41 | ||
42 | // XXX These should be per device | |
43 | static struct ftdi_context ftdic; | |
44 | static uint64_t cur_samplerate = 0; | |
45 | static uint32_t limit_msec = 0; | |
46 | static struct timeval start_tv; | |
47 | static int cur_firmware = -1; | |
48 | static int num_probes = 0; | |
49 | static int samples_per_event = 0; | |
50 | static int capture_ratio = 50; | |
51 | ||
52 | /* Single-pin trigger support. */ | |
53 | static uint8_t triggerpin = 1; | |
54 | static uint8_t triggerfall = 0; | |
55 | ||
56 | static uint64_t supported_samplerates[] = { | |
57 | KHZ(200), | |
58 | KHZ(250), | |
59 | KHZ(500), | |
60 | MHZ(1), | |
61 | MHZ(5), | |
62 | MHZ(10), | |
63 | MHZ(25), | |
64 | MHZ(50), | |
65 | MHZ(100), | |
66 | MHZ(200), | |
67 | 0, | |
68 | }; | |
69 | ||
70 | static struct samplerates samplerates = { | |
71 | KHZ(200), | |
72 | MHZ(200), | |
73 | 0, | |
74 | supported_samplerates, | |
75 | }; | |
76 | ||
77 | static int capabilities[] = { | |
78 | HWCAP_LOGIC_ANALYZER, | |
79 | HWCAP_SAMPLERATE, | |
80 | HWCAP_CAPTURE_RATIO, | |
81 | HWCAP_PROBECONFIG, | |
82 | ||
83 | HWCAP_LIMIT_MSEC, | |
84 | 0, | |
85 | }; | |
86 | ||
87 | /* Force the FPGA to reboot. */ | |
88 | static uint8_t suicide[] = { | |
89 | 0x84, 0x84, 0x88, 0x84, 0x88, 0x84, 0x88, 0x84, | |
90 | }; | |
91 | ||
92 | /* Prepare to upload firmware (FPGA specific). */ | |
93 | static uint8_t init[] = { | |
94 | 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, | |
95 | }; | |
96 | ||
97 | /* Initialize the logic analyzer mode. */ | |
98 | static uint8_t logic_mode_start[] = { | |
99 | 0x00, 0x40, 0x0f, 0x25, 0x35, 0x40, | |
100 | 0x2a, 0x3a, 0x40, 0x03, 0x20, 0x38, | |
101 | }; | |
102 | ||
103 | static const char *firmware_files[] = { | |
104 | "asix-sigma-50.fw", /* 50 MHz, supports 8 bit fractions */ | |
105 | "asix-sigma-100.fw", /* 100 MHz */ | |
106 | "asix-sigma-200.fw", /* 200 MHz */ | |
107 | "asix-sigma-50sync.fw", /* Synchronous clock from pin */ | |
108 | "asix-sigma-phasor.fw", /* Frequency counter */ | |
109 | }; | |
110 | ||
111 | static int sigma_read(void *buf, size_t size) | |
112 | { | |
113 | int ret; | |
114 | ||
115 | ret = ftdi_read_data(&ftdic, (unsigned char *)buf, size); | |
116 | if (ret < 0) { | |
117 | g_warning("ftdi_read_data failed: %s", | |
118 | ftdi_get_error_string(&ftdic)); | |
119 | } | |
120 | ||
121 | return ret; | |
122 | } | |
123 | ||
124 | static int sigma_write(void *buf, size_t size) | |
125 | { | |
126 | int ret; | |
127 | ||
128 | ret = ftdi_write_data(&ftdic, (unsigned char *)buf, size); | |
129 | if (ret < 0) { | |
130 | g_warning("ftdi_write_data failed: %s", | |
131 | ftdi_get_error_string(&ftdic)); | |
132 | } else if ((size_t) ret != size) { | |
133 | g_warning("ftdi_write_data did not complete write\n"); | |
134 | } | |
135 | ||
136 | return ret; | |
137 | } | |
138 | ||
139 | static int sigma_write_register(uint8_t reg, uint8_t *data, size_t len) | |
140 | { | |
141 | size_t i; | |
142 | uint8_t buf[len + 2]; | |
143 | int idx = 0; | |
144 | ||
145 | buf[idx++] = REG_ADDR_LOW | (reg & 0xf); | |
146 | buf[idx++] = REG_ADDR_HIGH | (reg >> 4); | |
147 | ||
148 | for (i = 0; i < len; ++i) { | |
149 | buf[idx++] = REG_DATA_LOW | (data[i] & 0xf); | |
150 | buf[idx++] = REG_DATA_HIGH_WRITE | (data[i] >> 4); | |
151 | } | |
152 | ||
153 | return sigma_write(buf, idx); | |
154 | } | |
155 | ||
156 | static int sigma_set_register(uint8_t reg, uint8_t value) | |
157 | { | |
158 | return sigma_write_register(reg, &value, 1); | |
159 | } | |
160 | ||
161 | static int sigma_read_register(uint8_t reg, uint8_t *data, size_t len) | |
162 | { | |
163 | uint8_t buf[3]; | |
164 | ||
165 | buf[0] = REG_ADDR_LOW | (reg & 0xf); | |
166 | buf[1] = REG_ADDR_HIGH | (reg >> 4); | |
167 | buf[2] = REG_READ_ADDR; | |
168 | ||
169 | sigma_write(buf, sizeof(buf)); | |
170 | ||
171 | return sigma_read(data, len); | |
172 | } | |
173 | ||
174 | static uint8_t sigma_get_register(uint8_t reg) | |
175 | { | |
176 | uint8_t value; | |
177 | ||
178 | if (1 != sigma_read_register(reg, &value, 1)) { | |
179 | g_warning("Sigma_get_register: 1 byte expected"); | |
180 | return 0; | |
181 | } | |
182 | ||
183 | return value; | |
184 | } | |
185 | ||
186 | static int sigma_read_pos(uint32_t *stoppos, uint32_t *triggerpos) | |
187 | { | |
188 | uint8_t buf[] = { | |
189 | REG_ADDR_LOW | READ_TRIGGER_POS_LOW, | |
190 | ||
191 | REG_READ_ADDR | NEXT_REG, | |
192 | REG_READ_ADDR | NEXT_REG, | |
193 | REG_READ_ADDR | NEXT_REG, | |
194 | REG_READ_ADDR | NEXT_REG, | |
195 | REG_READ_ADDR | NEXT_REG, | |
196 | REG_READ_ADDR | NEXT_REG, | |
197 | }; | |
198 | uint8_t result[6]; | |
199 | ||
200 | sigma_write(buf, sizeof(buf)); | |
201 | ||
202 | sigma_read(result, sizeof(result)); | |
203 | ||
204 | *triggerpos = result[0] | (result[1] << 8) | (result[2] << 16); | |
205 | *stoppos = result[3] | (result[4] << 8) | (result[5] << 16); | |
206 | ||
207 | /* Not really sure why this must be done, but according to spec. */ | |
208 | if ((--*stoppos & 0x1ff) == 0x1ff) | |
209 | stoppos -= 64; | |
210 | ||
211 | if ((*--triggerpos & 0x1ff) == 0x1ff) | |
212 | triggerpos -= 64; | |
213 | ||
214 | return 1; | |
215 | } | |
216 | ||
217 | static int sigma_read_dram(uint16_t startchunk, size_t numchunks, uint8_t *data) | |
218 | { | |
219 | size_t i; | |
220 | uint8_t buf[4096]; | |
221 | int idx = 0; | |
222 | ||
223 | /* Send the startchunk. Index start with 1. */ | |
224 | buf[0] = startchunk >> 8; | |
225 | buf[1] = startchunk & 0xff; | |
226 | sigma_write_register(WRITE_MEMROW, buf, 2); | |
227 | ||
228 | /* Read the DRAM. */ | |
229 | buf[idx++] = REG_DRAM_BLOCK; | |
230 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
231 | ||
232 | for (i = 0; i < numchunks; ++i) { | |
233 | /* Alternate bit to copy from DRAM to cache. */ | |
234 | if (i != (numchunks - 1)) | |
235 | buf[idx++] = REG_DRAM_BLOCK | (((i + 1) % 2) << 4); | |
236 | ||
237 | buf[idx++] = REG_DRAM_BLOCK_DATA | ((i % 2) << 4); | |
238 | ||
239 | if (i != (numchunks - 1)) | |
240 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
241 | } | |
242 | ||
243 | sigma_write(buf, idx); | |
244 | ||
245 | return sigma_read(data, numchunks * CHUNK_SIZE); | |
246 | } | |
247 | ||
248 | /* Generate the bitbang stream for programming the FPGA. */ | |
249 | static int bin2bitbang(const char *filename, | |
250 | unsigned char **buf, size_t *buf_size) | |
251 | { | |
252 | FILE *f; | |
253 | long file_size; | |
254 | unsigned long offset = 0; | |
255 | unsigned char *p; | |
256 | uint8_t *compressed_buf, *firmware; | |
257 | uLongf csize, fwsize; | |
258 | const int buffer_size = 65536; | |
259 | size_t i; | |
260 | int c, ret, bit, v; | |
261 | uint32_t imm = 0x3f6df2ab; | |
262 | ||
263 | f = fopen(filename, "r"); | |
264 | if (!f) { | |
265 | g_warning("fopen(\"%s\", \"r\")", filename); | |
266 | return -1; | |
267 | } | |
268 | ||
269 | if (-1 == fseek(f, 0, SEEK_END)) { | |
270 | g_warning("fseek on %s failed", filename); | |
271 | fclose(f); | |
272 | return -1; | |
273 | } | |
274 | ||
275 | file_size = ftell(f); | |
276 | ||
277 | fseek(f, 0, SEEK_SET); | |
278 | ||
279 | compressed_buf = g_malloc(file_size); | |
280 | firmware = g_malloc(buffer_size); | |
281 | ||
282 | if (!compressed_buf || !firmware) { | |
283 | g_warning("Error allocating buffers"); | |
284 | return -1; | |
285 | } | |
286 | ||
287 | csize = 0; | |
288 | while ((c = getc(f)) != EOF) { | |
289 | imm = (imm + 0xa853753) % 177 + (imm * 0x8034052); | |
290 | compressed_buf[csize++] = c ^ imm; | |
291 | } | |
292 | fclose(f); | |
293 | ||
294 | fwsize = buffer_size; | |
295 | ret = uncompress(firmware, &fwsize, compressed_buf, csize); | |
296 | if (ret < 0) { | |
297 | g_free(compressed_buf); | |
298 | g_free(firmware); | |
299 | g_warning("Could not unpack Sigma firmware. (Error %d)\n", ret); | |
300 | return -1; | |
301 | } | |
302 | ||
303 | g_free(compressed_buf); | |
304 | ||
305 | *buf_size = fwsize * 2 * 8; | |
306 | ||
307 | *buf = p = (unsigned char *)g_malloc(*buf_size); | |
308 | ||
309 | if (!p) { | |
310 | g_warning("Error allocating buffers"); | |
311 | return -1; | |
312 | } | |
313 | ||
314 | for (i = 0; i < fwsize; ++i) { | |
315 | for (bit = 7; bit >= 0; --bit) { | |
316 | v = firmware[i] & 1 << bit ? 0x40 : 0x00; | |
317 | p[offset++] = v | 0x01; | |
318 | p[offset++] = v; | |
319 | } | |
320 | } | |
321 | ||
322 | g_free(firmware); | |
323 | ||
324 | if (offset != *buf_size) { | |
325 | g_free(*buf); | |
326 | g_warning("Error reading firmware %s " | |
327 | "offset=%ld, file_size=%ld, buf_size=%zd\n", | |
328 | filename, offset, file_size, *buf_size); | |
329 | ||
330 | return -1; | |
331 | } | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static int hw_init(char *deviceinfo) | |
337 | { | |
338 | struct sigrok_device_instance *sdi; | |
339 | ||
340 | deviceinfo = deviceinfo; | |
341 | ||
342 | ftdi_init(&ftdic); | |
343 | ||
344 | /* Look for SIGMAs. */ | |
345 | if (ftdi_usb_open_desc(&ftdic, USB_VENDOR, USB_PRODUCT, | |
346 | USB_DESCRIPTION, NULL) < 0) | |
347 | return 0; | |
348 | ||
349 | /* Register SIGMA device. */ | |
350 | sdi = sigrok_device_instance_new(0, ST_INITIALIZING, | |
351 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
352 | if (!sdi) | |
353 | return 0; | |
354 | ||
355 | device_instances = g_slist_append(device_instances, sdi); | |
356 | ||
357 | /* We will open the device again when we need it. */ | |
358 | ftdi_usb_close(&ftdic); | |
359 | ||
360 | return 1; | |
361 | } | |
362 | ||
363 | static int upload_firmware(int firmware_idx) | |
364 | { | |
365 | int ret; | |
366 | unsigned char *buf; | |
367 | unsigned char pins; | |
368 | size_t buf_size; | |
369 | unsigned char result[32]; | |
370 | char firmware_path[128]; | |
371 | ||
372 | /* Make sure it's an ASIX SIGMA. */ | |
373 | if ((ret = ftdi_usb_open_desc(&ftdic, | |
374 | USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) { | |
375 | g_warning("ftdi_usb_open failed: %s", | |
376 | ftdi_get_error_string(&ftdic)); | |
377 | return 0; | |
378 | } | |
379 | ||
380 | if ((ret = ftdi_set_bitmode(&ftdic, 0xdf, BITMODE_BITBANG)) < 0) { | |
381 | g_warning("ftdi_set_bitmode failed: %s", | |
382 | ftdi_get_error_string(&ftdic)); | |
383 | return 0; | |
384 | } | |
385 | ||
386 | /* Four times the speed of sigmalogan - Works well. */ | |
387 | if ((ret = ftdi_set_baudrate(&ftdic, 750000)) < 0) { | |
388 | g_warning("ftdi_set_baudrate failed: %s", | |
389 | ftdi_get_error_string(&ftdic)); | |
390 | return 0; | |
391 | } | |
392 | ||
393 | /* Force the FPGA to reboot. */ | |
394 | sigma_write(suicide, sizeof(suicide)); | |
395 | sigma_write(suicide, sizeof(suicide)); | |
396 | sigma_write(suicide, sizeof(suicide)); | |
397 | sigma_write(suicide, sizeof(suicide)); | |
398 | ||
399 | /* Prepare to upload firmware (FPGA specific). */ | |
400 | sigma_write(init, sizeof(init)); | |
401 | ||
402 | ftdi_usb_purge_buffers(&ftdic); | |
403 | ||
404 | /* Wait until the FPGA asserts INIT_B. */ | |
405 | while (1) { | |
406 | ret = sigma_read(result, 1); | |
407 | if (result[0] & 0x20) | |
408 | break; | |
409 | } | |
410 | ||
411 | /* Prepare firmware. */ | |
412 | snprintf(firmware_path, sizeof(firmware_path), "%s/%s", FIRMWARE_DIR, | |
413 | firmware_files[firmware_idx]); | |
414 | ||
415 | if (-1 == bin2bitbang(firmware_path, &buf, &buf_size)) { | |
416 | g_warning("An error occured while reading the firmware: %s", | |
417 | firmware_path); | |
418 | return SIGROK_ERR; | |
419 | } | |
420 | ||
421 | /* Upload firmare. */ | |
422 | sigma_write(buf, buf_size); | |
423 | ||
424 | g_free(buf); | |
425 | ||
426 | if ((ret = ftdi_set_bitmode(&ftdic, 0x00, BITMODE_RESET)) < 0) { | |
427 | g_warning("ftdi_set_bitmode failed: %s", | |
428 | ftdi_get_error_string(&ftdic)); | |
429 | return SIGROK_ERR; | |
430 | } | |
431 | ||
432 | ftdi_usb_purge_buffers(&ftdic); | |
433 | ||
434 | /* Discard garbage. */ | |
435 | while (1 == sigma_read(&pins, 1)) | |
436 | ; | |
437 | ||
438 | /* Initialize the logic analyzer mode. */ | |
439 | sigma_write(logic_mode_start, sizeof(logic_mode_start)); | |
440 | ||
441 | /* Expect a 3 byte reply. */ | |
442 | ret = sigma_read(result, 3); | |
443 | if (ret != 3 || | |
444 | result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) { | |
445 | g_warning("Configuration failed. Invalid reply received."); | |
446 | return SIGROK_ERR; | |
447 | } | |
448 | ||
449 | cur_firmware = firmware_idx; | |
450 | ||
451 | return SIGROK_OK; | |
452 | } | |
453 | ||
454 | static int hw_opendev(int device_index) | |
455 | { | |
456 | struct sigrok_device_instance *sdi; | |
457 | int ret; | |
458 | ||
459 | /* Make sure it's an ASIX SIGMA. */ | |
460 | if ((ret = ftdi_usb_open_desc(&ftdic, | |
461 | USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) { | |
462 | ||
463 | g_warning("ftdi_usb_open failed: %s", | |
464 | ftdi_get_error_string(&ftdic)); | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
470 | return SIGROK_ERR; | |
471 | ||
472 | sdi->status = ST_ACTIVE; | |
473 | ||
474 | return SIGROK_OK; | |
475 | } | |
476 | ||
477 | static int set_samplerate(struct sigrok_device_instance *sdi, uint64_t samplerate) | |
478 | { | |
479 | int i, ret; | |
480 | ||
481 | sdi = sdi; | |
482 | ||
483 | for (i = 0; supported_samplerates[i]; i++) { | |
484 | if (supported_samplerates[i] == samplerate) | |
485 | break; | |
486 | } | |
487 | if (supported_samplerates[i] == 0) | |
488 | return SIGROK_ERR_SAMPLERATE; | |
489 | ||
490 | if (samplerate <= MHZ(50)) { | |
491 | ret = upload_firmware(0); | |
492 | num_probes = 16; | |
493 | } | |
494 | if (samplerate == MHZ(100)) { | |
495 | ret = upload_firmware(1); | |
496 | num_probes = 8; | |
497 | } | |
498 | else if (samplerate == MHZ(200)) { | |
499 | ret = upload_firmware(2); | |
500 | num_probes = 4; | |
501 | } | |
502 | ||
503 | cur_samplerate = samplerate; | |
504 | samples_per_event = 16 / num_probes; | |
505 | ||
506 | g_message("Firmware uploaded"); | |
507 | ||
508 | return ret; | |
509 | } | |
510 | ||
511 | /* Only trigger on single pin supported (in 100-200 MHz modes). */ | |
512 | static int configure_probes(GSList *probes) | |
513 | { | |
514 | struct probe *probe; | |
515 | GSList *l; | |
516 | int trigger_set = 0; | |
517 | ||
518 | if (cur_samplerate <= MHZ(50)) { | |
519 | g_warning("Trigger support only implemented " | |
520 | "in 100 and 200 MHz mode."); | |
521 | return SIGROK_ERR; | |
522 | } | |
523 | ||
524 | for (l = probes; l; l = l->next) { | |
525 | probe = (struct probe *)l->data; | |
526 | ||
527 | if (!probe->enabled || !probe->trigger) | |
528 | continue; | |
529 | ||
530 | if (trigger_set) { | |
531 | g_warning("Asix Sigma only supports a single pin trigger " | |
532 | "in 100 and 200 MHz mode."); | |
533 | return SIGROK_ERR; | |
534 | } | |
535 | ||
536 | /* Found trigger. */ | |
537 | if (probe->trigger[0] == 'f') | |
538 | triggerfall = 1; | |
539 | else | |
540 | triggerfall = 0; | |
541 | ||
542 | triggerpin = probe->index - 1; | |
543 | trigger_set = 1; | |
544 | } | |
545 | ||
546 | return SIGROK_OK; | |
547 | } | |
548 | ||
549 | static void hw_closedev(int device_index) | |
550 | { | |
551 | device_index = device_index; | |
552 | ||
553 | ftdi_usb_close(&ftdic); | |
554 | } | |
555 | ||
556 | static void hw_cleanup(void) | |
557 | { | |
558 | } | |
559 | ||
560 | static void *hw_get_device_info(int device_index, int device_info_id) | |
561 | { | |
562 | struct sigrok_device_instance *sdi; | |
563 | void *info = NULL; | |
564 | ||
565 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) { | |
566 | fprintf(stderr, "It's NULL.\n"); | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | switch (device_info_id) { | |
571 | case DI_INSTANCE: | |
572 | info = sdi; | |
573 | break; | |
574 | case DI_NUM_PROBES: | |
575 | info = GINT_TO_POINTER(16); | |
576 | break; | |
577 | case DI_SAMPLERATES: | |
578 | info = &samplerates; | |
579 | break; | |
580 | case DI_TRIGGER_TYPES: | |
581 | info = (char *)TRIGGER_TYPES; | |
582 | break; | |
583 | case DI_CUR_SAMPLERATE: | |
584 | info = &cur_samplerate; | |
585 | break; | |
586 | } | |
587 | ||
588 | return info; | |
589 | } | |
590 | ||
591 | static int hw_get_status(int device_index) | |
592 | { | |
593 | struct sigrok_device_instance *sdi; | |
594 | ||
595 | sdi = get_sigrok_device_instance(device_instances, device_index); | |
596 | if (sdi) | |
597 | return sdi->status; | |
598 | else | |
599 | return ST_NOT_FOUND; | |
600 | } | |
601 | ||
602 | static int *hw_get_capabilities(void) | |
603 | { | |
604 | return capabilities; | |
605 | } | |
606 | ||
607 | static int hw_set_configuration(int device_index, int capability, void *value) | |
608 | { | |
609 | struct sigrok_device_instance *sdi; | |
610 | int ret; | |
611 | ||
612 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
613 | return SIGROK_ERR; | |
614 | ||
615 | if (capability == HWCAP_SAMPLERATE) { | |
616 | ret = set_samplerate(sdi, *(uint64_t*) value); | |
617 | } else if (capability == HWCAP_PROBECONFIG) { | |
618 | ret = configure_probes(value); | |
619 | } else if (capability == HWCAP_LIMIT_MSEC) { | |
620 | limit_msec = strtoull(value, NULL, 10); | |
621 | ret = SIGROK_OK; | |
622 | } else if (capability == HWCAP_CAPTURE_RATIO) { | |
623 | capture_ratio = strtoull(value, NULL, 10); | |
624 | ret = SIGROK_OK; | |
625 | } else if (capability == HWCAP_PROBECONFIG) { | |
626 | ret = configure_probes((GSList *) value); | |
627 | } else { | |
628 | ret = SIGROK_ERR; | |
629 | } | |
630 | ||
631 | return ret; | |
632 | } | |
633 | ||
634 | /* | |
635 | * Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster. | |
636 | * Each event is 20ns apart, and can contain multiple samples. | |
637 | * | |
638 | * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart. | |
639 | * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart. | |
640 | * For 50 MHz and below, events contain one sample for each channel, | |
641 | * spread 20 ns apart. | |
642 | */ | |
643 | static int decode_chunk_ts(uint8_t *buf, uint16_t *lastts, | |
644 | uint16_t *lastsample, int triggerpos, void *user_data) | |
645 | { | |
646 | uint16_t tsdiff, ts; | |
647 | uint16_t samples[65536 * samples_per_event]; | |
648 | struct datafeed_packet packet; | |
649 | int i, j, k, l, numpad, tosend; | |
650 | size_t n = 0, sent = 0; | |
651 | int clustersize = EVENTS_PER_CLUSTER * samples_per_event; | |
652 | uint16_t *event; | |
653 | uint16_t cur_sample; | |
654 | int triggerts = -1; | |
655 | ||
656 | /* Find in which cluster the trigger occured. */ | |
657 | if (triggerpos != -1) | |
658 | triggerts = (triggerpos / 7); | |
659 | ||
660 | /* For each ts. */ | |
661 | for (i = 0; i < 64; ++i) { | |
662 | ts = *(uint16_t *) &buf[i * 16]; | |
663 | tsdiff = ts - *lastts; | |
664 | *lastts = ts; | |
665 | ||
666 | /* Pad last sample up to current point. */ | |
667 | numpad = tsdiff * samples_per_event - clustersize; | |
668 | if (numpad > 0) { | |
669 | for (j = 0; j < numpad; ++j) | |
670 | samples[j] = *lastsample; | |
671 | ||
672 | n = numpad; | |
673 | } | |
674 | ||
675 | /* Send samples between previous and this timestamp to sigrok. */ | |
676 | sent = 0; | |
677 | while (sent < n) { | |
678 | tosend = MIN(2048, n - sent); | |
679 | ||
680 | packet.type = DF_LOGIC16; | |
681 | packet.length = tosend * sizeof(uint16_t); | |
682 | packet.payload = samples + sent; | |
683 | session_bus(user_data, &packet); | |
684 | ||
685 | sent += tosend; | |
686 | } | |
687 | n = 0; | |
688 | ||
689 | event = (uint16_t *) &buf[i * 16 + 2]; | |
690 | cur_sample = 0; | |
691 | ||
692 | /* For each event in cluster. */ | |
693 | for (j = 0; j < 7; ++j) { | |
694 | ||
695 | /* For each sample in event. */ | |
696 | for (k = 0; k < samples_per_event; ++k) { | |
697 | cur_sample = 0; | |
698 | ||
699 | /* For each probe. */ | |
700 | for (l = 0; l < num_probes; ++l) | |
701 | cur_sample |= (!!(event[j] & (1 << (l * | |
702 | samples_per_event + k)))) | |
703 | << l; | |
704 | ||
705 | samples[n++] = cur_sample; | |
706 | } | |
707 | } | |
708 | ||
709 | *lastsample = samples[n - 1]; | |
710 | ||
711 | /* Send data up to trigger point (if triggered). */ | |
712 | sent = 0; | |
713 | if (i == triggerts) { | |
714 | /* | |
715 | * Trigger is presumptively only accurate to event, i.e. | |
716 | * for 100 and 200 MHz, where multiple samples are coded | |
717 | * in a single event, the trigger does not match the | |
718 | * exact sample. | |
719 | */ | |
720 | tosend = (triggerpos % 7) - 3; | |
721 | ||
722 | if (tosend > 0) { | |
723 | packet.type = DF_LOGIC16; | |
724 | packet.length = tosend * sizeof(uint16_t); | |
725 | packet.payload = samples; | |
726 | session_bus(user_data, &packet); | |
727 | ||
728 | sent += tosend; | |
729 | } | |
730 | ||
731 | packet.type = DF_TRIGGER; | |
732 | packet.length = 0; | |
733 | packet.payload = 0; | |
734 | session_bus(user_data, &packet); | |
735 | } | |
736 | ||
737 | /* Send rest of the chunk to sigrok. */ | |
738 | tosend = n - sent; | |
739 | ||
740 | packet.type = DF_LOGIC16; | |
741 | packet.length = tosend * sizeof(uint16_t); | |
742 | packet.payload = samples + sent; | |
743 | session_bus(user_data, &packet); | |
744 | } | |
745 | ||
746 | return SIGROK_OK; | |
747 | } | |
748 | ||
749 | static int receive_data(int fd, int revents, void *user_data) | |
750 | { | |
751 | struct datafeed_packet packet; | |
752 | const int chunks_per_read = 32; | |
753 | unsigned char buf[chunks_per_read * CHUNK_SIZE]; | |
754 | int bufsz, numchunks, curchunk, i, newchunks; | |
755 | uint32_t triggerpos, stoppos, running_msec; | |
756 | struct timeval tv; | |
757 | uint16_t lastts = 0; | |
758 | uint16_t lastsample = 0; | |
759 | uint8_t modestatus; | |
760 | int triggerchunk = -1; | |
761 | ||
762 | fd = fd; | |
763 | revents = revents; | |
764 | ||
765 | /* Get the current position. */ | |
766 | sigma_read_pos(&stoppos, &triggerpos); | |
767 | numchunks = stoppos / 512; | |
768 | ||
769 | /* Check if the has expired, or memory is full. */ | |
770 | gettimeofday(&tv, 0); | |
771 | running_msec = (tv.tv_sec - start_tv.tv_sec) * 1000 + | |
772 | (tv.tv_usec - start_tv.tv_usec) / 1000; | |
773 | ||
774 | if (running_msec < limit_msec && numchunks < 32767) | |
775 | return FALSE; | |
776 | ||
777 | /* Stop acqusition. */ | |
778 | sigma_set_register(WRITE_MODE, 0x11); | |
779 | ||
780 | /* Set SDRAM Read Enable. */ | |
781 | sigma_set_register(WRITE_MODE, 0x02); | |
782 | ||
783 | /* Get the current position. */ | |
784 | sigma_read_pos(&stoppos, &triggerpos); | |
785 | ||
786 | /* Check if trigger has fired. */ | |
787 | modestatus = sigma_get_register(READ_MODE); | |
788 | if (modestatus & 0x20) { | |
789 | triggerchunk = triggerpos / 512; | |
790 | } | |
791 | ||
792 | /* Download sample data. */ | |
793 | for (curchunk = 0; curchunk < numchunks;) { | |
794 | newchunks = MIN(chunks_per_read, numchunks - curchunk); | |
795 | ||
796 | g_message("Downloading sample data: %.0f %%", | |
797 | 100.0 * curchunk / numchunks); | |
798 | ||
799 | bufsz = sigma_read_dram(curchunk, newchunks, buf); | |
800 | ||
801 | /* Find first ts. */ | |
802 | if (curchunk == 0) | |
803 | lastts = *(uint16_t *) buf - 1; | |
804 | ||
805 | /* Decode chunks and send them to sigrok. */ | |
806 | for (i = 0; i < newchunks; ++i) { | |
807 | if (curchunk + i == triggerchunk) | |
808 | decode_chunk_ts(buf + (i * CHUNK_SIZE), | |
809 | &lastts, &lastsample, | |
810 | triggerpos & 0x1ff, user_data); | |
811 | else | |
812 | decode_chunk_ts(buf + (i * CHUNK_SIZE), | |
813 | &lastts, &lastsample, | |
814 | -1, user_data); | |
815 | } | |
816 | ||
817 | curchunk += newchunks; | |
818 | } | |
819 | ||
820 | /* End of data. */ | |
821 | packet.type = DF_END; | |
822 | packet.length = 0; | |
823 | session_bus(user_data, &packet); | |
824 | ||
825 | return TRUE; | |
826 | } | |
827 | ||
828 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
829 | { | |
830 | struct sigrok_device_instance *sdi; | |
831 | struct datafeed_packet packet; | |
832 | struct datafeed_header header; | |
833 | struct clockselect_50 clockselect; | |
834 | int frac; | |
835 | uint8_t triggerselect; | |
836 | struct triggerinout triggerinout_conf; | |
837 | ||
838 | session_device_id = session_device_id; | |
839 | ||
840 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
841 | return SIGROK_ERR; | |
842 | ||
843 | device_index = device_index; | |
844 | ||
845 | /* If the samplerate has not been set, default to 50 MHz. */ | |
846 | if (cur_firmware == -1) | |
847 | set_samplerate(sdi, MHZ(50)); | |
848 | ||
849 | /* Enter trigger programming mode. */ | |
850 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20); | |
851 | ||
852 | /* 100 and 200 MHz mode. */ | |
853 | if (cur_samplerate >= MHZ(100)) { | |
854 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81); | |
855 | ||
856 | triggerselect = (1 << LEDSEL1) | (triggerfall << 3) | | |
857 | (triggerpin & 0x7); | |
858 | ||
859 | /* All other modes. */ | |
860 | } else if (cur_samplerate <= MHZ(50)) { | |
861 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20); | |
862 | ||
863 | triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0); | |
864 | } | |
865 | ||
866 | /* Setup trigger in and out pins to default values. */ | |
867 | memset(&triggerinout_conf, 0, sizeof(struct triggerinout)); | |
868 | triggerinout_conf.trgout_bytrigger = 1; | |
869 | triggerinout_conf.trgout_enable = 1; | |
870 | ||
871 | sigma_write_register(WRITE_TRIGGER_OPTION, | |
872 | (uint8_t *) &triggerinout_conf, | |
873 | sizeof(struct triggerinout)); | |
874 | ||
875 | /* Go back to normal mode. */ | |
876 | sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect); | |
877 | ||
878 | /* Set clock select register. */ | |
879 | if (cur_samplerate == MHZ(200)) | |
880 | /* Enable 4 probes. */ | |
881 | sigma_set_register(WRITE_CLOCK_SELECT, 0xf0); | |
882 | else if (cur_samplerate == MHZ(100)) | |
883 | /* Enable 8 probes. */ | |
884 | sigma_set_register(WRITE_CLOCK_SELECT, 0x00); | |
885 | else { | |
886 | /* | |
887 | * 50 MHz mode (or fraction thereof). Any fraction down to | |
888 | * 50 MHz / 256 can be used, but is not supported by sigrok API. | |
889 | */ | |
890 | frac = MHZ(50) / cur_samplerate - 1; | |
891 | ||
892 | clockselect.async = 0; | |
893 | clockselect.fraction = frac; | |
894 | clockselect.disabled_probes = 0; | |
895 | ||
896 | sigma_write_register(WRITE_CLOCK_SELECT, | |
897 | (uint8_t *) &clockselect, | |
898 | sizeof(clockselect)); | |
899 | } | |
900 | ||
901 | /* Setup maximum post trigger time. */ | |
902 | sigma_set_register(WRITE_POST_TRIGGER, (capture_ratio * 256) / 100); | |
903 | ||
904 | /* Start acqusition. */ | |
905 | gettimeofday(&start_tv, 0); | |
906 | sigma_set_register(WRITE_MODE, 0x0d); | |
907 | ||
908 | /* Send header packet to the session bus. */ | |
909 | packet.type = DF_HEADER; | |
910 | packet.length = sizeof(struct datafeed_header); | |
911 | packet.payload = &header; | |
912 | header.feed_version = 1; | |
913 | gettimeofday(&header.starttime, NULL); | |
914 | header.samplerate = cur_samplerate; | |
915 | header.protocol_id = PROTO_RAW; | |
916 | header.num_probes = num_probes; | |
917 | session_bus(session_device_id, &packet); | |
918 | ||
919 | /* Add capture source. */ | |
920 | source_add(0, G_IO_IN, 10, receive_data, session_device_id); | |
921 | ||
922 | return SIGROK_OK; | |
923 | } | |
924 | ||
925 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) | |
926 | { | |
927 | device_index = device_index; | |
928 | session_device_id = session_device_id; | |
929 | ||
930 | /* Stop acquisition. */ | |
931 | sigma_set_register(WRITE_MODE, 0x11); | |
932 | ||
933 | // XXX Set some state to indicate that data should be sent to sigrok | |
934 | // Now, we just wait for timeout | |
935 | } | |
936 | ||
937 | struct device_plugin asix_sigma_plugin_info = { | |
938 | "asix-sigma", | |
939 | 1, | |
940 | hw_init, | |
941 | hw_cleanup, | |
942 | hw_opendev, | |
943 | hw_closedev, | |
944 | hw_get_device_info, | |
945 | hw_get_status, | |
946 | hw_get_capabilities, | |
947 | hw_set_configuration, | |
948 | hw_start_acquisition, | |
949 | hw_stop_acquisition, | |
950 | }; |