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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 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/SIGMA2 logic analyzer driver | |
24 | */ | |
25 | ||
26 | #include <glib.h> | |
27 | #include <glib/gstdio.h> | |
28 | #include <ftdi.h> | |
29 | #include <string.h> | |
30 | #include <unistd.h> | |
31 | #include "libsigrok.h" | |
32 | #include "libsigrok-internal.h" | |
33 | #include "asix-sigma.h" | |
34 | ||
35 | #define USB_VENDOR 0xa600 | |
36 | #define USB_PRODUCT 0xa000 | |
37 | #define USB_DESCRIPTION "ASIX SIGMA" | |
38 | #define USB_VENDOR_NAME "ASIX" | |
39 | #define USB_MODEL_NAME "SIGMA" | |
40 | ||
41 | SR_PRIV struct sr_dev_driver asix_sigma_driver_info; | |
42 | static struct sr_dev_driver *di = &asix_sigma_driver_info; | |
43 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
44 | ||
45 | /* | |
46 | * The ASIX Sigma supports arbitrary integer frequency divider in | |
47 | * the 50MHz mode. The divider is in range 1...256 , allowing for | |
48 | * very precise sampling rate selection. This driver supports only | |
49 | * a subset of the sampling rates. | |
50 | */ | |
51 | static const uint64_t samplerates[] = { | |
52 | SR_KHZ(200), /* div=250 */ | |
53 | SR_KHZ(250), /* div=200 */ | |
54 | SR_KHZ(500), /* div=100 */ | |
55 | SR_MHZ(1), /* div=50 */ | |
56 | SR_MHZ(5), /* div=10 */ | |
57 | SR_MHZ(10), /* div=5 */ | |
58 | SR_MHZ(25), /* div=2 */ | |
59 | SR_MHZ(50), /* div=1 */ | |
60 | SR_MHZ(100), /* Special FW needed */ | |
61 | SR_MHZ(200), /* Special FW needed */ | |
62 | }; | |
63 | ||
64 | /* | |
65 | * Channel numbers seem to go from 1-16, according to this image: | |
66 | * http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg | |
67 | * (the cable has two additional GND pins, and a TI and TO pin) | |
68 | */ | |
69 | static const char *channel_names[] = { | |
70 | "1", "2", "3", "4", "5", "6", "7", "8", | |
71 | "9", "10", "11", "12", "13", "14", "15", "16", | |
72 | }; | |
73 | ||
74 | static const uint32_t devopts[] = { | |
75 | SR_CONF_LOGIC_ANALYZER, | |
76 | SR_CONF_SAMPLERATE, | |
77 | SR_CONF_TRIGGER_MATCH, | |
78 | SR_CONF_CAPTURE_RATIO, | |
79 | SR_CONF_LIMIT_MSEC, | |
80 | }; | |
81 | ||
82 | static const int32_t trigger_matches[] = { | |
83 | SR_TRIGGER_ZERO, | |
84 | SR_TRIGGER_ONE, | |
85 | SR_TRIGGER_RISING, | |
86 | SR_TRIGGER_FALLING, | |
87 | }; | |
88 | ||
89 | static const char *sigma_firmware_files[] = { | |
90 | /* 50 MHz, supports 8 bit fractions */ | |
91 | FIRMWARE_DIR "/asix-sigma-50.fw", | |
92 | /* 100 MHz */ | |
93 | FIRMWARE_DIR "/asix-sigma-100.fw", | |
94 | /* 200 MHz */ | |
95 | FIRMWARE_DIR "/asix-sigma-200.fw", | |
96 | /* Synchronous clock from pin */ | |
97 | FIRMWARE_DIR "/asix-sigma-50sync.fw", | |
98 | /* Frequency counter */ | |
99 | FIRMWARE_DIR "/asix-sigma-phasor.fw", | |
100 | }; | |
101 | ||
102 | static int sigma_read(void *buf, size_t size, struct dev_context *devc) | |
103 | { | |
104 | int ret; | |
105 | ||
106 | ret = ftdi_read_data(&devc->ftdic, (unsigned char *)buf, size); | |
107 | if (ret < 0) { | |
108 | sr_err("ftdi_read_data failed: %s", | |
109 | ftdi_get_error_string(&devc->ftdic)); | |
110 | } | |
111 | ||
112 | return ret; | |
113 | } | |
114 | ||
115 | static int sigma_write(void *buf, size_t size, struct dev_context *devc) | |
116 | { | |
117 | int ret; | |
118 | ||
119 | ret = ftdi_write_data(&devc->ftdic, (unsigned char *)buf, size); | |
120 | if (ret < 0) { | |
121 | sr_err("ftdi_write_data failed: %s", | |
122 | ftdi_get_error_string(&devc->ftdic)); | |
123 | } else if ((size_t) ret != size) { | |
124 | sr_err("ftdi_write_data did not complete write."); | |
125 | } | |
126 | ||
127 | return ret; | |
128 | } | |
129 | ||
130 | static int sigma_write_register(uint8_t reg, uint8_t *data, size_t len, | |
131 | struct dev_context *devc) | |
132 | { | |
133 | size_t i; | |
134 | uint8_t buf[len + 2]; | |
135 | int idx = 0; | |
136 | ||
137 | buf[idx++] = REG_ADDR_LOW | (reg & 0xf); | |
138 | buf[idx++] = REG_ADDR_HIGH | (reg >> 4); | |
139 | ||
140 | for (i = 0; i < len; ++i) { | |
141 | buf[idx++] = REG_DATA_LOW | (data[i] & 0xf); | |
142 | buf[idx++] = REG_DATA_HIGH_WRITE | (data[i] >> 4); | |
143 | } | |
144 | ||
145 | return sigma_write(buf, idx, devc); | |
146 | } | |
147 | ||
148 | static int sigma_set_register(uint8_t reg, uint8_t value, struct dev_context *devc) | |
149 | { | |
150 | return sigma_write_register(reg, &value, 1, devc); | |
151 | } | |
152 | ||
153 | static int sigma_read_register(uint8_t reg, uint8_t *data, size_t len, | |
154 | struct dev_context *devc) | |
155 | { | |
156 | uint8_t buf[3]; | |
157 | ||
158 | buf[0] = REG_ADDR_LOW | (reg & 0xf); | |
159 | buf[1] = REG_ADDR_HIGH | (reg >> 4); | |
160 | buf[2] = REG_READ_ADDR; | |
161 | ||
162 | sigma_write(buf, sizeof(buf), devc); | |
163 | ||
164 | return sigma_read(data, len, devc); | |
165 | } | |
166 | ||
167 | static uint8_t sigma_get_register(uint8_t reg, struct dev_context *devc) | |
168 | { | |
169 | uint8_t value; | |
170 | ||
171 | if (1 != sigma_read_register(reg, &value, 1, devc)) { | |
172 | sr_err("sigma_get_register: 1 byte expected"); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | return value; | |
177 | } | |
178 | ||
179 | static int sigma_read_pos(uint32_t *stoppos, uint32_t *triggerpos, | |
180 | struct dev_context *devc) | |
181 | { | |
182 | uint8_t buf[] = { | |
183 | REG_ADDR_LOW | READ_TRIGGER_POS_LOW, | |
184 | ||
185 | REG_READ_ADDR | NEXT_REG, | |
186 | REG_READ_ADDR | NEXT_REG, | |
187 | REG_READ_ADDR | NEXT_REG, | |
188 | REG_READ_ADDR | NEXT_REG, | |
189 | REG_READ_ADDR | NEXT_REG, | |
190 | REG_READ_ADDR | NEXT_REG, | |
191 | }; | |
192 | uint8_t result[6]; | |
193 | ||
194 | sigma_write(buf, sizeof(buf), devc); | |
195 | ||
196 | sigma_read(result, sizeof(result), devc); | |
197 | ||
198 | *triggerpos = result[0] | (result[1] << 8) | (result[2] << 16); | |
199 | *stoppos = result[3] | (result[4] << 8) | (result[5] << 16); | |
200 | ||
201 | /* Not really sure why this must be done, but according to spec. */ | |
202 | if ((--*stoppos & 0x1ff) == 0x1ff) | |
203 | stoppos -= 64; | |
204 | ||
205 | if ((*--triggerpos & 0x1ff) == 0x1ff) | |
206 | triggerpos -= 64; | |
207 | ||
208 | return 1; | |
209 | } | |
210 | ||
211 | static int sigma_read_dram(uint16_t startchunk, size_t numchunks, | |
212 | uint8_t *data, struct dev_context *devc) | |
213 | { | |
214 | size_t i; | |
215 | uint8_t buf[4096]; | |
216 | int idx = 0; | |
217 | ||
218 | /* Send the startchunk. Index start with 1. */ | |
219 | buf[0] = startchunk >> 8; | |
220 | buf[1] = startchunk & 0xff; | |
221 | sigma_write_register(WRITE_MEMROW, buf, 2, devc); | |
222 | ||
223 | /* Read the DRAM. */ | |
224 | buf[idx++] = REG_DRAM_BLOCK; | |
225 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
226 | ||
227 | for (i = 0; i < numchunks; ++i) { | |
228 | /* Alternate bit to copy from DRAM to cache. */ | |
229 | if (i != (numchunks - 1)) | |
230 | buf[idx++] = REG_DRAM_BLOCK | (((i + 1) % 2) << 4); | |
231 | ||
232 | buf[idx++] = REG_DRAM_BLOCK_DATA | ((i % 2) << 4); | |
233 | ||
234 | if (i != (numchunks - 1)) | |
235 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
236 | } | |
237 | ||
238 | sigma_write(buf, idx, devc); | |
239 | ||
240 | return sigma_read(data, numchunks * CHUNK_SIZE, devc); | |
241 | } | |
242 | ||
243 | /* Upload trigger look-up tables to Sigma. */ | |
244 | static int sigma_write_trigger_lut(struct triggerlut *lut, struct dev_context *devc) | |
245 | { | |
246 | int i; | |
247 | uint8_t tmp[2]; | |
248 | uint16_t bit; | |
249 | ||
250 | /* Transpose the table and send to Sigma. */ | |
251 | for (i = 0; i < 16; ++i) { | |
252 | bit = 1 << i; | |
253 | ||
254 | tmp[0] = tmp[1] = 0; | |
255 | ||
256 | if (lut->m2d[0] & bit) | |
257 | tmp[0] |= 0x01; | |
258 | if (lut->m2d[1] & bit) | |
259 | tmp[0] |= 0x02; | |
260 | if (lut->m2d[2] & bit) | |
261 | tmp[0] |= 0x04; | |
262 | if (lut->m2d[3] & bit) | |
263 | tmp[0] |= 0x08; | |
264 | ||
265 | if (lut->m3 & bit) | |
266 | tmp[0] |= 0x10; | |
267 | if (lut->m3s & bit) | |
268 | tmp[0] |= 0x20; | |
269 | if (lut->m4 & bit) | |
270 | tmp[0] |= 0x40; | |
271 | ||
272 | if (lut->m0d[0] & bit) | |
273 | tmp[1] |= 0x01; | |
274 | if (lut->m0d[1] & bit) | |
275 | tmp[1] |= 0x02; | |
276 | if (lut->m0d[2] & bit) | |
277 | tmp[1] |= 0x04; | |
278 | if (lut->m0d[3] & bit) | |
279 | tmp[1] |= 0x08; | |
280 | ||
281 | if (lut->m1d[0] & bit) | |
282 | tmp[1] |= 0x10; | |
283 | if (lut->m1d[1] & bit) | |
284 | tmp[1] |= 0x20; | |
285 | if (lut->m1d[2] & bit) | |
286 | tmp[1] |= 0x40; | |
287 | if (lut->m1d[3] & bit) | |
288 | tmp[1] |= 0x80; | |
289 | ||
290 | sigma_write_register(WRITE_TRIGGER_SELECT0, tmp, sizeof(tmp), | |
291 | devc); | |
292 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x30 | i, devc); | |
293 | } | |
294 | ||
295 | /* Send the parameters */ | |
296 | sigma_write_register(WRITE_TRIGGER_SELECT0, (uint8_t *) &lut->params, | |
297 | sizeof(lut->params), devc); | |
298 | ||
299 | return SR_OK; | |
300 | } | |
301 | ||
302 | static void clear_helper(void *priv) | |
303 | { | |
304 | struct dev_context *devc; | |
305 | ||
306 | devc = priv; | |
307 | ||
308 | ftdi_deinit(&devc->ftdic); | |
309 | } | |
310 | ||
311 | static int dev_clear(void) | |
312 | { | |
313 | return std_dev_clear(di, clear_helper); | |
314 | } | |
315 | ||
316 | static int init(struct sr_context *sr_ctx) | |
317 | { | |
318 | return std_init(sr_ctx, di, LOG_PREFIX); | |
319 | } | |
320 | ||
321 | static GSList *scan(GSList *options) | |
322 | { | |
323 | struct sr_dev_inst *sdi; | |
324 | struct sr_channel *ch; | |
325 | struct drv_context *drvc; | |
326 | struct dev_context *devc; | |
327 | GSList *devices; | |
328 | struct ftdi_device_list *devlist; | |
329 | char serial_txt[10]; | |
330 | uint32_t serial; | |
331 | int ret; | |
332 | unsigned int i; | |
333 | ||
334 | (void)options; | |
335 | ||
336 | drvc = di->priv; | |
337 | ||
338 | devices = NULL; | |
339 | ||
340 | if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { | |
341 | sr_err("%s: devc malloc failed", __func__); | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | ftdi_init(&devc->ftdic); | |
346 | ||
347 | /* Look for SIGMAs. */ | |
348 | ||
349 | if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist, | |
350 | USB_VENDOR, USB_PRODUCT)) <= 0) { | |
351 | if (ret < 0) | |
352 | sr_err("ftdi_usb_find_all(): %d", ret); | |
353 | goto free; | |
354 | } | |
355 | ||
356 | /* Make sure it's a version 1 or 2 SIGMA. */ | |
357 | ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0, | |
358 | serial_txt, sizeof(serial_txt)); | |
359 | sscanf(serial_txt, "%x", &serial); | |
360 | ||
361 | if (serial < 0xa6010000 || serial > 0xa602ffff) { | |
362 | sr_err("Only SIGMA and SIGMA2 are supported " | |
363 | "in this version of libsigrok."); | |
364 | goto free; | |
365 | } | |
366 | ||
367 | sr_info("Found ASIX SIGMA - Serial: %s", serial_txt); | |
368 | ||
369 | devc->cur_samplerate = samplerates[0]; | |
370 | devc->period_ps = 0; | |
371 | devc->limit_msec = 0; | |
372 | devc->cur_firmware = -1; | |
373 | devc->num_channels = 0; | |
374 | devc->samples_per_event = 0; | |
375 | devc->capture_ratio = 50; | |
376 | devc->use_triggers = 0; | |
377 | ||
378 | /* Register SIGMA device. */ | |
379 | if (!(sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING, USB_VENDOR_NAME, | |
380 | USB_MODEL_NAME, NULL))) { | |
381 | sr_err("%s: sdi was NULL", __func__); | |
382 | goto free; | |
383 | } | |
384 | sdi->driver = di; | |
385 | ||
386 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) { | |
387 | ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, | |
388 | channel_names[i]); | |
389 | if (!ch) | |
390 | return NULL; | |
391 | sdi->channels = g_slist_append(sdi->channels, ch); | |
392 | } | |
393 | ||
394 | devices = g_slist_append(devices, sdi); | |
395 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
396 | sdi->priv = devc; | |
397 | ||
398 | /* We will open the device again when we need it. */ | |
399 | ftdi_list_free(&devlist); | |
400 | ||
401 | return devices; | |
402 | ||
403 | free: | |
404 | ftdi_deinit(&devc->ftdic); | |
405 | g_free(devc); | |
406 | return NULL; | |
407 | } | |
408 | ||
409 | static GSList *dev_list(void) | |
410 | { | |
411 | return ((struct drv_context *)(di->priv))->instances; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Configure the FPGA for bitbang mode. | |
416 | * This sequence is documented in section 2. of the ASIX Sigma programming | |
417 | * manual. This sequence is necessary to configure the FPGA in the Sigma | |
418 | * into Bitbang mode, in which it can be programmed with the firmware. | |
419 | */ | |
420 | static int sigma_fpga_init_bitbang(struct dev_context *devc) | |
421 | { | |
422 | uint8_t suicide[] = { | |
423 | 0x84, 0x84, 0x88, 0x84, 0x88, 0x84, 0x88, 0x84, | |
424 | }; | |
425 | uint8_t init_array[] = { | |
426 | 0x01, 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, | |
427 | 0x01, 0x01, | |
428 | }; | |
429 | int i, ret, timeout = 10000; | |
430 | uint8_t data; | |
431 | ||
432 | /* Section 2. part 1), do the FPGA suicide. */ | |
433 | sigma_write(suicide, sizeof(suicide), devc); | |
434 | sigma_write(suicide, sizeof(suicide), devc); | |
435 | sigma_write(suicide, sizeof(suicide), devc); | |
436 | sigma_write(suicide, sizeof(suicide), devc); | |
437 | ||
438 | /* Section 2. part 2), do pulse on D1. */ | |
439 | sigma_write(init_array, sizeof(init_array), devc); | |
440 | ftdi_usb_purge_buffers(&devc->ftdic); | |
441 | ||
442 | /* Wait until the FPGA asserts D6/INIT_B. */ | |
443 | for (i = 0; i < timeout; i++) { | |
444 | ret = sigma_read(&data, 1, devc); | |
445 | if (ret < 0) | |
446 | return ret; | |
447 | /* Test if pin D6 got asserted. */ | |
448 | if (data & (1 << 5)) | |
449 | return 0; | |
450 | /* The D6 was not asserted yet, wait a bit. */ | |
451 | usleep(10000); | |
452 | } | |
453 | ||
454 | return SR_ERR_TIMEOUT; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Configure the FPGA for logic-analyzer mode. | |
459 | */ | |
460 | static int sigma_fpga_init_la(struct dev_context *devc) | |
461 | { | |
462 | /* Initialize the logic analyzer mode. */ | |
463 | uint8_t logic_mode_start[] = { | |
464 | REG_ADDR_LOW | (READ_ID & 0xf), | |
465 | REG_ADDR_HIGH | (READ_ID >> 8), | |
466 | REG_READ_ADDR, /* Read ID register. */ | |
467 | ||
468 | REG_ADDR_LOW | (WRITE_TEST & 0xf), | |
469 | REG_DATA_LOW | 0x5, | |
470 | REG_DATA_HIGH_WRITE | 0x5, | |
471 | REG_READ_ADDR, /* Read scratch register. */ | |
472 | ||
473 | REG_DATA_LOW | 0xa, | |
474 | REG_DATA_HIGH_WRITE | 0xa, | |
475 | REG_READ_ADDR, /* Read scratch register. */ | |
476 | ||
477 | REG_ADDR_LOW | (WRITE_MODE & 0xf), | |
478 | REG_DATA_LOW | 0x0, | |
479 | REG_DATA_HIGH_WRITE | 0x8, | |
480 | }; | |
481 | ||
482 | uint8_t result[3]; | |
483 | int ret; | |
484 | ||
485 | /* Initialize the logic analyzer mode. */ | |
486 | sigma_write(logic_mode_start, sizeof(logic_mode_start), devc); | |
487 | ||
488 | /* Expect a 3 byte reply since we issued three READ requests. */ | |
489 | ret = sigma_read(result, 3, devc); | |
490 | if (ret != 3) | |
491 | goto err; | |
492 | ||
493 | if (result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) | |
494 | goto err; | |
495 | ||
496 | return SR_OK; | |
497 | err: | |
498 | sr_err("Configuration failed. Invalid reply received."); | |
499 | return SR_ERR; | |
500 | } | |
501 | ||
502 | /* | |
503 | * Read the firmware from a file and transform it into a series of bitbang | |
504 | * pulses used to program the FPGA. Note that the *bb_cmd must be free()'d | |
505 | * by the caller of this function. | |
506 | */ | |
507 | static int sigma_fw_2_bitbang(const char *filename, | |
508 | uint8_t **bb_cmd, gsize *bb_cmd_size) | |
509 | { | |
510 | GMappedFile *file; | |
511 | GError *error; | |
512 | gsize i, file_size, bb_size; | |
513 | gchar *firmware; | |
514 | uint8_t *bb_stream, *bbs; | |
515 | uint32_t imm; | |
516 | int bit, v; | |
517 | int ret = SR_OK; | |
518 | ||
519 | /* | |
520 | * Map the file and make the mapped buffer writable. | |
521 | * NOTE: Using writable=TRUE does _NOT_ mean that file that is mapped | |
522 | * will be modified. It will not be modified until someone uses | |
523 | * g_file_set_contents() on it. | |
524 | */ | |
525 | error = NULL; | |
526 | file = g_mapped_file_new(filename, TRUE, &error); | |
527 | g_assert_no_error(error); | |
528 | ||
529 | file_size = g_mapped_file_get_length(file); | |
530 | firmware = g_mapped_file_get_contents(file); | |
531 | g_assert(firmware); | |
532 | ||
533 | /* Weird magic transformation below, I have no idea what it does. */ | |
534 | imm = 0x3f6df2ab; | |
535 | for (i = 0; i < file_size; i++) { | |
536 | imm = (imm + 0xa853753) % 177 + (imm * 0x8034052); | |
537 | firmware[i] ^= imm & 0xff; | |
538 | } | |
539 | ||
540 | /* | |
541 | * Now that the firmware is "transformed", we will transcribe the | |
542 | * firmware blob into a sequence of toggles of the Dx wires. This | |
543 | * sequence will be fed directly into the Sigma, which must be in | |
544 | * the FPGA bitbang programming mode. | |
545 | */ | |
546 | ||
547 | /* Each bit of firmware is transcribed as two toggles of Dx wires. */ | |
548 | bb_size = file_size * 8 * 2; | |
549 | bb_stream = (uint8_t *)g_try_malloc(bb_size); | |
550 | if (!bb_stream) { | |
551 | sr_err("%s: Failed to allocate bitbang stream", __func__); | |
552 | ret = SR_ERR_MALLOC; | |
553 | goto exit; | |
554 | } | |
555 | ||
556 | bbs = bb_stream; | |
557 | for (i = 0; i < file_size; i++) { | |
558 | for (bit = 7; bit >= 0; bit--) { | |
559 | v = (firmware[i] & (1 << bit)) ? 0x40 : 0x00; | |
560 | *bbs++ = v | 0x01; | |
561 | *bbs++ = v; | |
562 | } | |
563 | } | |
564 | ||
565 | /* The transformation completed successfully, return the result. */ | |
566 | *bb_cmd = bb_stream; | |
567 | *bb_cmd_size = bb_size; | |
568 | ||
569 | exit: | |
570 | g_mapped_file_unref(file); | |
571 | return ret; | |
572 | } | |
573 | ||
574 | static int upload_firmware(int firmware_idx, struct dev_context *devc) | |
575 | { | |
576 | int ret; | |
577 | unsigned char *buf; | |
578 | unsigned char pins; | |
579 | size_t buf_size; | |
580 | const char *firmware = sigma_firmware_files[firmware_idx]; | |
581 | struct ftdi_context *ftdic = &devc->ftdic; | |
582 | ||
583 | /* Make sure it's an ASIX SIGMA. */ | |
584 | ret = ftdi_usb_open_desc(ftdic, USB_VENDOR, USB_PRODUCT, | |
585 | USB_DESCRIPTION, NULL); | |
586 | if (ret < 0) { | |
587 | sr_err("ftdi_usb_open failed: %s", | |
588 | ftdi_get_error_string(ftdic)); | |
589 | return 0; | |
590 | } | |
591 | ||
592 | ret = ftdi_set_bitmode(ftdic, 0xdf, BITMODE_BITBANG); | |
593 | if (ret < 0) { | |
594 | sr_err("ftdi_set_bitmode failed: %s", | |
595 | ftdi_get_error_string(ftdic)); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | /* Four times the speed of sigmalogan - Works well. */ | |
600 | ret = ftdi_set_baudrate(ftdic, 750000); | |
601 | if (ret < 0) { | |
602 | sr_err("ftdi_set_baudrate failed: %s", | |
603 | ftdi_get_error_string(ftdic)); | |
604 | return 0; | |
605 | } | |
606 | ||
607 | /* Initialize the FPGA for firmware upload. */ | |
608 | ret = sigma_fpga_init_bitbang(devc); | |
609 | if (ret) | |
610 | return ret; | |
611 | ||
612 | /* Prepare firmware. */ | |
613 | ret = sigma_fw_2_bitbang(firmware, &buf, &buf_size); | |
614 | if (ret != SR_OK) { | |
615 | sr_err("An error occured while reading the firmware: %s", | |
616 | firmware); | |
617 | return ret; | |
618 | } | |
619 | ||
620 | /* Upload firmare. */ | |
621 | sr_info("Uploading firmware file '%s'.", firmware); | |
622 | sigma_write(buf, buf_size, devc); | |
623 | ||
624 | g_free(buf); | |
625 | ||
626 | ret = ftdi_set_bitmode(ftdic, 0x00, BITMODE_RESET); | |
627 | if (ret < 0) { | |
628 | sr_err("ftdi_set_bitmode failed: %s", | |
629 | ftdi_get_error_string(ftdic)); | |
630 | return SR_ERR; | |
631 | } | |
632 | ||
633 | ftdi_usb_purge_buffers(ftdic); | |
634 | ||
635 | /* Discard garbage. */ | |
636 | while (sigma_read(&pins, 1, devc) == 1) | |
637 | ; | |
638 | ||
639 | /* Initialize the FPGA for logic-analyzer mode. */ | |
640 | ret = sigma_fpga_init_la(devc); | |
641 | if (ret != SR_OK) | |
642 | return ret; | |
643 | ||
644 | devc->cur_firmware = firmware_idx; | |
645 | ||
646 | sr_info("Firmware uploaded."); | |
647 | ||
648 | return SR_OK; | |
649 | } | |
650 | ||
651 | static int dev_open(struct sr_dev_inst *sdi) | |
652 | { | |
653 | struct dev_context *devc; | |
654 | int ret; | |
655 | ||
656 | devc = sdi->priv; | |
657 | ||
658 | /* Make sure it's an ASIX SIGMA. */ | |
659 | if ((ret = ftdi_usb_open_desc(&devc->ftdic, | |
660 | USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) { | |
661 | ||
662 | sr_err("ftdi_usb_open failed: %s", | |
663 | ftdi_get_error_string(&devc->ftdic)); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | sdi->status = SR_ST_ACTIVE; | |
669 | ||
670 | return SR_OK; | |
671 | } | |
672 | ||
673 | static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) | |
674 | { | |
675 | struct dev_context *devc; | |
676 | unsigned int i; | |
677 | int ret; | |
678 | ||
679 | devc = sdi->priv; | |
680 | ret = SR_OK; | |
681 | ||
682 | for (i = 0; i < ARRAY_SIZE(samplerates); i++) { | |
683 | if (samplerates[i] == samplerate) | |
684 | break; | |
685 | } | |
686 | if (samplerates[i] == 0) | |
687 | return SR_ERR_SAMPLERATE; | |
688 | ||
689 | if (samplerate <= SR_MHZ(50)) { | |
690 | ret = upload_firmware(0, devc); | |
691 | devc->num_channels = 16; | |
692 | } else if (samplerate == SR_MHZ(100)) { | |
693 | ret = upload_firmware(1, devc); | |
694 | devc->num_channels = 8; | |
695 | } else if (samplerate == SR_MHZ(200)) { | |
696 | ret = upload_firmware(2, devc); | |
697 | devc->num_channels = 4; | |
698 | } | |
699 | ||
700 | if (ret == SR_OK) { | |
701 | devc->cur_samplerate = samplerate; | |
702 | devc->period_ps = 1000000000000ULL / samplerate; | |
703 | devc->samples_per_event = 16 / devc->num_channels; | |
704 | devc->state.state = SIGMA_IDLE; | |
705 | } | |
706 | ||
707 | return ret; | |
708 | } | |
709 | ||
710 | /* | |
711 | * In 100 and 200 MHz mode, only a single pin rising/falling can be | |
712 | * set as trigger. In other modes, two rising/falling triggers can be set, | |
713 | * in addition to value/mask trigger for any number of channels. | |
714 | * | |
715 | * The Sigma supports complex triggers using boolean expressions, but this | |
716 | * has not been implemented yet. | |
717 | */ | |
718 | static int convert_trigger(const struct sr_dev_inst *sdi) | |
719 | { | |
720 | struct dev_context *devc; | |
721 | struct sr_trigger *trigger; | |
722 | struct sr_trigger_stage *stage; | |
723 | struct sr_trigger_match *match; | |
724 | const GSList *l, *m; | |
725 | int channelbit, trigger_set; | |
726 | ||
727 | devc = sdi->priv; | |
728 | memset(&devc->trigger, 0, sizeof(struct sigma_trigger)); | |
729 | if (!(trigger = sr_session_trigger_get(sdi->session))) | |
730 | return SR_OK; | |
731 | ||
732 | trigger_set = 0; | |
733 | for (l = trigger->stages; l; l = l->next) { | |
734 | stage = l->data; | |
735 | for (m = stage->matches; m; m = m->next) { | |
736 | match = m->data; | |
737 | if (!match->channel->enabled) | |
738 | /* Ignore disabled channels with a trigger. */ | |
739 | continue; | |
740 | channelbit = 1 << (match->channel->index); | |
741 | if (devc->cur_samplerate >= SR_MHZ(100)) { | |
742 | /* Fast trigger support. */ | |
743 | if (trigger_set) { | |
744 | sr_err("Only a single pin trigger is " | |
745 | "supported in 100 and 200MHz mode."); | |
746 | return SR_ERR; | |
747 | } | |
748 | if (match->match == SR_TRIGGER_FALLING) | |
749 | devc->trigger.fallingmask |= channelbit; | |
750 | else if (match->match == SR_TRIGGER_RISING) | |
751 | devc->trigger.risingmask |= channelbit; | |
752 | else { | |
753 | sr_err("Only rising/falling trigger is " | |
754 | "supported in 100 and 200MHz mode."); | |
755 | return SR_ERR; | |
756 | } | |
757 | ||
758 | ++trigger_set; | |
759 | } else { | |
760 | /* Simple trigger support (event). */ | |
761 | if (match->match == SR_TRIGGER_ONE) { | |
762 | devc->trigger.simplevalue |= channelbit; | |
763 | devc->trigger.simplemask |= channelbit; | |
764 | } | |
765 | else if (match->match == SR_TRIGGER_ZERO) { | |
766 | devc->trigger.simplevalue &= ~channelbit; | |
767 | devc->trigger.simplemask |= channelbit; | |
768 | } | |
769 | else if (match->match == SR_TRIGGER_FALLING) { | |
770 | devc->trigger.fallingmask |= channelbit; | |
771 | ++trigger_set; | |
772 | } | |
773 | else if (match->match == SR_TRIGGER_RISING) { | |
774 | devc->trigger.risingmask |= channelbit; | |
775 | ++trigger_set; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Actually, Sigma supports 2 rising/falling triggers, | |
780 | * but they are ORed and the current trigger syntax | |
781 | * does not permit ORed triggers. | |
782 | */ | |
783 | if (trigger_set > 1) { | |
784 | sr_err("Only 1 rising/falling trigger " | |
785 | "is supported."); | |
786 | return SR_ERR; | |
787 | } | |
788 | } | |
789 | } | |
790 | } | |
791 | ||
792 | ||
793 | return SR_OK; | |
794 | } | |
795 | ||
796 | static int dev_close(struct sr_dev_inst *sdi) | |
797 | { | |
798 | struct dev_context *devc; | |
799 | ||
800 | devc = sdi->priv; | |
801 | ||
802 | /* TODO */ | |
803 | if (sdi->status == SR_ST_ACTIVE) | |
804 | ftdi_usb_close(&devc->ftdic); | |
805 | ||
806 | sdi->status = SR_ST_INACTIVE; | |
807 | ||
808 | return SR_OK; | |
809 | } | |
810 | ||
811 | static int cleanup(void) | |
812 | { | |
813 | return dev_clear(); | |
814 | } | |
815 | ||
816 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
817 | const struct sr_channel_group *cg) | |
818 | { | |
819 | struct dev_context *devc; | |
820 | ||
821 | (void)cg; | |
822 | ||
823 | if (!sdi) | |
824 | return SR_ERR; | |
825 | devc = sdi->priv; | |
826 | ||
827 | switch (key) { | |
828 | case SR_CONF_SAMPLERATE: | |
829 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
830 | break; | |
831 | case SR_CONF_LIMIT_MSEC: | |
832 | *data = g_variant_new_uint64(devc->limit_msec); | |
833 | break; | |
834 | case SR_CONF_CAPTURE_RATIO: | |
835 | *data = g_variant_new_uint64(devc->capture_ratio); | |
836 | break; | |
837 | default: | |
838 | return SR_ERR_NA; | |
839 | } | |
840 | ||
841 | return SR_OK; | |
842 | } | |
843 | ||
844 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
845 | const struct sr_channel_group *cg) | |
846 | { | |
847 | struct dev_context *devc; | |
848 | uint64_t tmp; | |
849 | int ret; | |
850 | ||
851 | (void)cg; | |
852 | ||
853 | if (sdi->status != SR_ST_ACTIVE) | |
854 | return SR_ERR_DEV_CLOSED; | |
855 | ||
856 | devc = sdi->priv; | |
857 | ||
858 | ret = SR_OK; | |
859 | switch (key) { | |
860 | case SR_CONF_SAMPLERATE: | |
861 | ret = set_samplerate(sdi, g_variant_get_uint64(data)); | |
862 | break; | |
863 | case SR_CONF_LIMIT_MSEC: | |
864 | tmp = g_variant_get_uint64(data); | |
865 | if (tmp > 0) | |
866 | devc->limit_msec = g_variant_get_uint64(data); | |
867 | else | |
868 | ret = SR_ERR; | |
869 | break; | |
870 | case SR_CONF_LIMIT_SAMPLES: | |
871 | tmp = g_variant_get_uint64(data); | |
872 | devc->limit_msec = tmp * 1000 / devc->cur_samplerate; | |
873 | break; | |
874 | case SR_CONF_CAPTURE_RATIO: | |
875 | tmp = g_variant_get_uint64(data); | |
876 | if (tmp <= 100) | |
877 | devc->capture_ratio = tmp; | |
878 | else | |
879 | ret = SR_ERR; | |
880 | break; | |
881 | default: | |
882 | ret = SR_ERR_NA; | |
883 | } | |
884 | ||
885 | return ret; | |
886 | } | |
887 | ||
888 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
889 | const struct sr_channel_group *cg) | |
890 | { | |
891 | GVariant *gvar; | |
892 | GVariantBuilder gvb; | |
893 | ||
894 | (void)sdi; | |
895 | (void)cg; | |
896 | ||
897 | switch (key) { | |
898 | case SR_CONF_DEVICE_OPTIONS: | |
899 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
900 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
901 | break; | |
902 | case SR_CONF_SAMPLERATE: | |
903 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
904 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, | |
905 | ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
906 | g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); | |
907 | *data = g_variant_builder_end(&gvb); | |
908 | break; | |
909 | case SR_CONF_TRIGGER_MATCH: | |
910 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
911 | trigger_matches, ARRAY_SIZE(trigger_matches), | |
912 | sizeof(int32_t)); | |
913 | break; | |
914 | default: | |
915 | return SR_ERR_NA; | |
916 | } | |
917 | ||
918 | return SR_OK; | |
919 | } | |
920 | ||
921 | /* Software trigger to determine exact trigger position. */ | |
922 | static int get_trigger_offset(uint8_t *samples, uint16_t last_sample, | |
923 | struct sigma_trigger *t) | |
924 | { | |
925 | int i; | |
926 | uint16_t sample = 0; | |
927 | ||
928 | for (i = 0; i < 8; ++i) { | |
929 | if (i > 0) | |
930 | last_sample = sample; | |
931 | sample = samples[2 * i] | (samples[2 * i + 1] << 8); | |
932 | ||
933 | /* Simple triggers. */ | |
934 | if ((sample & t->simplemask) != t->simplevalue) | |
935 | continue; | |
936 | ||
937 | /* Rising edge. */ | |
938 | if (((last_sample & t->risingmask) != 0) || | |
939 | ((sample & t->risingmask) != t->risingmask)) | |
940 | continue; | |
941 | ||
942 | /* Falling edge. */ | |
943 | if ((last_sample & t->fallingmask) != t->fallingmask || | |
944 | (sample & t->fallingmask) != 0) | |
945 | continue; | |
946 | ||
947 | break; | |
948 | } | |
949 | ||
950 | /* If we did not match, return original trigger pos. */ | |
951 | return i & 0x7; | |
952 | } | |
953 | ||
954 | ||
955 | /* | |
956 | * Return the timestamp of "DRAM cluster". | |
957 | */ | |
958 | static uint16_t sigma_dram_cluster_ts(struct sigma_dram_cluster *cluster) | |
959 | { | |
960 | return (cluster->timestamp_hi << 8) | cluster->timestamp_lo; | |
961 | } | |
962 | ||
963 | static void sigma_decode_dram_cluster(struct sigma_dram_cluster *dram_cluster, | |
964 | unsigned int events_in_cluster, | |
965 | unsigned int triggered, | |
966 | struct sr_dev_inst *sdi) | |
967 | { | |
968 | struct dev_context *devc = sdi->priv; | |
969 | struct sigma_state *ss = &devc->state; | |
970 | struct sr_datafeed_packet packet; | |
971 | struct sr_datafeed_logic logic; | |
972 | uint16_t tsdiff, ts; | |
973 | uint8_t samples[2048]; | |
974 | unsigned int i; | |
975 | ||
976 | ts = sigma_dram_cluster_ts(dram_cluster); | |
977 | tsdiff = ts - ss->lastts; | |
978 | ss->lastts = ts; | |
979 | ||
980 | packet.type = SR_DF_LOGIC; | |
981 | packet.payload = &logic; | |
982 | logic.unitsize = 2; | |
983 | logic.data = samples; | |
984 | ||
985 | /* | |
986 | * First of all, send Sigrok a copy of the last sample from | |
987 | * previous cluster as many times as needed to make up for | |
988 | * the differential characteristics of data we get from the | |
989 | * Sigma. Sigrok needs one sample of data per period. | |
990 | * | |
991 | * One DRAM cluster contains a timestamp and seven samples, | |
992 | * the units of timestamp are "devc->period_ps" , the first | |
993 | * sample in the cluster happens at the time of the timestamp | |
994 | * and the remaining samples happen at timestamp +1...+6 . | |
995 | */ | |
996 | for (ts = 0; ts < tsdiff - (EVENTS_PER_CLUSTER - 1); ts++) { | |
997 | i = ts % 1024; | |
998 | samples[2 * i + 0] = ss->lastsample & 0xff; | |
999 | samples[2 * i + 1] = ss->lastsample >> 8; | |
1000 | ||
1001 | /* | |
1002 | * If we have 1024 samples ready or we're at the | |
1003 | * end of submitting the padding samples, submit | |
1004 | * the packet to Sigrok. | |
1005 | */ | |
1006 | if ((i == 1023) || (ts == (tsdiff - EVENTS_PER_CLUSTER))) { | |
1007 | logic.length = (i + 1) * logic.unitsize; | |
1008 | sr_session_send(sdi, &packet); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Parse the samples in current cluster and prepare them | |
1014 | * to be submitted to Sigrok. | |
1015 | */ | |
1016 | for (i = 0; i < events_in_cluster; i++) { | |
1017 | samples[2 * i + 1] = dram_cluster->samples[i].sample_lo; | |
1018 | samples[2 * i + 0] = dram_cluster->samples[i].sample_hi; | |
1019 | } | |
1020 | ||
1021 | /* Send data up to trigger point (if triggered). */ | |
1022 | int trigger_offset = 0; | |
1023 | if (triggered) { | |
1024 | /* | |
1025 | * Trigger is not always accurate to sample because of | |
1026 | * pipeline delay. However, it always triggers before | |
1027 | * the actual event. We therefore look at the next | |
1028 | * samples to pinpoint the exact position of the trigger. | |
1029 | */ | |
1030 | trigger_offset = get_trigger_offset(samples, | |
1031 | ss->lastsample, &devc->trigger); | |
1032 | ||
1033 | if (trigger_offset > 0) { | |
1034 | packet.type = SR_DF_LOGIC; | |
1035 | logic.length = trigger_offset * logic.unitsize; | |
1036 | sr_session_send(sdi, &packet); | |
1037 | events_in_cluster -= trigger_offset; | |
1038 | } | |
1039 | ||
1040 | /* Only send trigger if explicitly enabled. */ | |
1041 | if (devc->use_triggers) { | |
1042 | packet.type = SR_DF_TRIGGER; | |
1043 | sr_session_send(sdi, &packet); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | if (events_in_cluster > 0) { | |
1048 | packet.type = SR_DF_LOGIC; | |
1049 | logic.length = events_in_cluster * logic.unitsize; | |
1050 | logic.data = samples + (trigger_offset * logic.unitsize); | |
1051 | sr_session_send(sdi, &packet); | |
1052 | } | |
1053 | ||
1054 | ss->lastsample = | |
1055 | samples[2 * (events_in_cluster - 1) + 0] | | |
1056 | (samples[2 * (events_in_cluster - 1) + 1] << 8); | |
1057 | ||
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster. | |
1062 | * Each event is 20ns apart, and can contain multiple samples. | |
1063 | * | |
1064 | * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart. | |
1065 | * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart. | |
1066 | * For 50 MHz and below, events contain one sample for each channel, | |
1067 | * spread 20 ns apart. | |
1068 | */ | |
1069 | static int decode_chunk_ts(struct sigma_dram_line *dram_line, | |
1070 | uint16_t events_in_line, | |
1071 | uint32_t trigger_event, | |
1072 | struct sr_dev_inst *sdi) | |
1073 | { | |
1074 | struct sigma_dram_cluster *dram_cluster; | |
1075 | struct dev_context *devc = sdi->priv; | |
1076 | unsigned int clusters_in_line = | |
1077 | (events_in_line + (EVENTS_PER_CLUSTER - 1)) / EVENTS_PER_CLUSTER; | |
1078 | unsigned int events_in_cluster; | |
1079 | unsigned int i; | |
1080 | uint32_t trigger_cluster = ~0, triggered = 0; | |
1081 | ||
1082 | /* Check if trigger is in this chunk. */ | |
1083 | if (trigger_event < (64 * 7)) { | |
1084 | if (devc->cur_samplerate <= SR_MHZ(50)) { | |
1085 | trigger_event -= MIN(EVENTS_PER_CLUSTER - 1, | |
1086 | trigger_event); | |
1087 | } | |
1088 | ||
1089 | /* Find in which cluster the trigger occured. */ | |
1090 | trigger_cluster = trigger_event / EVENTS_PER_CLUSTER; | |
1091 | } | |
1092 | ||
1093 | /* For each full DRAM cluster. */ | |
1094 | for (i = 0; i < clusters_in_line; i++) { | |
1095 | dram_cluster = &dram_line->cluster[i]; | |
1096 | ||
1097 | /* The last cluster might not be full. */ | |
1098 | if ((i == clusters_in_line - 1) && | |
1099 | (events_in_line % EVENTS_PER_CLUSTER)) { | |
1100 | events_in_cluster = events_in_line % EVENTS_PER_CLUSTER; | |
1101 | } else { | |
1102 | events_in_cluster = EVENTS_PER_CLUSTER; | |
1103 | } | |
1104 | ||
1105 | triggered = (i == trigger_cluster); | |
1106 | sigma_decode_dram_cluster(dram_cluster, events_in_cluster, | |
1107 | triggered, sdi); | |
1108 | } | |
1109 | ||
1110 | return SR_OK; | |
1111 | } | |
1112 | ||
1113 | static int download_capture(struct sr_dev_inst *sdi) | |
1114 | { | |
1115 | struct dev_context *devc = sdi->priv; | |
1116 | const uint32_t chunks_per_read = 32; | |
1117 | struct sigma_dram_line *dram_line; | |
1118 | int bufsz; | |
1119 | uint32_t stoppos, triggerpos; | |
1120 | struct sr_datafeed_packet packet; | |
1121 | uint8_t modestatus; | |
1122 | ||
1123 | uint32_t i; | |
1124 | uint32_t dl_lines_total, dl_lines_curr, dl_lines_done; | |
1125 | uint32_t dl_events_in_line = 64 * 7; | |
1126 | uint32_t trg_line = ~0, trg_event = ~0; | |
1127 | ||
1128 | dram_line = g_try_malloc0(chunks_per_read * sizeof(*dram_line)); | |
1129 | if (!dram_line) | |
1130 | return FALSE; | |
1131 | ||
1132 | sr_info("Downloading sample data."); | |
1133 | ||
1134 | /* Stop acquisition. */ | |
1135 | sigma_set_register(WRITE_MODE, 0x11, devc); | |
1136 | ||
1137 | /* Set SDRAM Read Enable. */ | |
1138 | sigma_set_register(WRITE_MODE, 0x02, devc); | |
1139 | ||
1140 | /* Get the current position. */ | |
1141 | sigma_read_pos(&stoppos, &triggerpos, devc); | |
1142 | ||
1143 | /* Check if trigger has fired. */ | |
1144 | modestatus = sigma_get_register(READ_MODE, devc); | |
1145 | if (modestatus & 0x20) { | |
1146 | trg_line = triggerpos >> 9; | |
1147 | trg_event = triggerpos & 0x1ff; | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * Determine how many 1024b "DRAM lines" do we need to read from the | |
1152 | * Sigma so we have a complete set of samples. Note that the last | |
1153 | * line can be only partial, containing less than 64 clusters. | |
1154 | */ | |
1155 | dl_lines_total = (stoppos >> 9) + 1; | |
1156 | ||
1157 | dl_lines_done = 0; | |
1158 | ||
1159 | while (dl_lines_total > dl_lines_done) { | |
1160 | /* We can download only up-to 32 DRAM lines in one go! */ | |
1161 | dl_lines_curr = MIN(chunks_per_read, dl_lines_total); | |
1162 | ||
1163 | bufsz = sigma_read_dram(dl_lines_done, dl_lines_curr, | |
1164 | (uint8_t *)dram_line, devc); | |
1165 | /* TODO: Check bufsz. For now, just avoid compiler warnings. */ | |
1166 | (void)bufsz; | |
1167 | ||
1168 | /* This is the first DRAM line, so find the initial timestamp. */ | |
1169 | if (dl_lines_done == 0) { | |
1170 | devc->state.lastts = | |
1171 | sigma_dram_cluster_ts(&dram_line[0].cluster[0]); | |
1172 | devc->state.lastsample = 0; | |
1173 | } | |
1174 | ||
1175 | for (i = 0; i < dl_lines_curr; i++) { | |
1176 | uint32_t trigger_event = ~0; | |
1177 | /* The last "DRAM line" can be only partially full. */ | |
1178 | if (dl_lines_done + i == dl_lines_total - 1) | |
1179 | dl_events_in_line = stoppos & 0x1ff; | |
1180 | ||
1181 | /* Test if the trigger happened on this line. */ | |
1182 | if (dl_lines_done + i == trg_line) | |
1183 | trigger_event = trg_event; | |
1184 | ||
1185 | decode_chunk_ts(dram_line + i, dl_events_in_line, | |
1186 | trigger_event, sdi); | |
1187 | } | |
1188 | ||
1189 | dl_lines_done += dl_lines_curr; | |
1190 | } | |
1191 | ||
1192 | /* All done. */ | |
1193 | packet.type = SR_DF_END; | |
1194 | sr_session_send(sdi, &packet); | |
1195 | ||
1196 | dev_acquisition_stop(sdi, sdi); | |
1197 | ||
1198 | g_free(dram_line); | |
1199 | ||
1200 | return TRUE; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Handle the Sigma when in CAPTURE mode. This function checks: | |
1205 | * - Sampling time ended | |
1206 | * - DRAM capacity overflow | |
1207 | * This function triggers download of the samples from Sigma | |
1208 | * in case either of the above conditions is true. | |
1209 | */ | |
1210 | static int sigma_capture_mode(struct sr_dev_inst *sdi) | |
1211 | { | |
1212 | struct dev_context *devc = sdi->priv; | |
1213 | ||
1214 | uint64_t running_msec; | |
1215 | struct timeval tv; | |
1216 | ||
1217 | uint32_t stoppos, triggerpos; | |
1218 | ||
1219 | /* Check if the selected sampling duration passed. */ | |
1220 | gettimeofday(&tv, 0); | |
1221 | running_msec = (tv.tv_sec - devc->start_tv.tv_sec) * 1000 + | |
1222 | (tv.tv_usec - devc->start_tv.tv_usec) / 1000; | |
1223 | if (running_msec >= devc->limit_msec) | |
1224 | return download_capture(sdi); | |
1225 | ||
1226 | /* Get the position in DRAM to which the FPGA is writing now. */ | |
1227 | sigma_read_pos(&stoppos, &triggerpos, devc); | |
1228 | /* Test if DRAM is full and if so, download the data. */ | |
1229 | if ((stoppos >> 9) == 32767) | |
1230 | return download_capture(sdi); | |
1231 | ||
1232 | return TRUE; | |
1233 | } | |
1234 | ||
1235 | static int receive_data(int fd, int revents, void *cb_data) | |
1236 | { | |
1237 | struct sr_dev_inst *sdi; | |
1238 | struct dev_context *devc; | |
1239 | ||
1240 | (void)fd; | |
1241 | (void)revents; | |
1242 | ||
1243 | sdi = cb_data; | |
1244 | devc = sdi->priv; | |
1245 | ||
1246 | if (devc->state.state == SIGMA_IDLE) | |
1247 | return TRUE; | |
1248 | ||
1249 | if (devc->state.state == SIGMA_CAPTURE) | |
1250 | return sigma_capture_mode(sdi); | |
1251 | ||
1252 | return TRUE; | |
1253 | } | |
1254 | ||
1255 | /* Build a LUT entry used by the trigger functions. */ | |
1256 | static void build_lut_entry(uint16_t value, uint16_t mask, uint16_t *entry) | |
1257 | { | |
1258 | int i, j, k, bit; | |
1259 | ||
1260 | /* For each quad channel. */ | |
1261 | for (i = 0; i < 4; ++i) { | |
1262 | entry[i] = 0xffff; | |
1263 | ||
1264 | /* For each bit in LUT. */ | |
1265 | for (j = 0; j < 16; ++j) | |
1266 | ||
1267 | /* For each channel in quad. */ | |
1268 | for (k = 0; k < 4; ++k) { | |
1269 | bit = 1 << (i * 4 + k); | |
1270 | ||
1271 | /* Set bit in entry */ | |
1272 | if ((mask & bit) && | |
1273 | ((!(value & bit)) != | |
1274 | (!(j & (1 << k))))) | |
1275 | entry[i] &= ~(1 << j); | |
1276 | } | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | /* Add a logical function to LUT mask. */ | |
1281 | static void add_trigger_function(enum triggerop oper, enum triggerfunc func, | |
1282 | int index, int neg, uint16_t *mask) | |
1283 | { | |
1284 | int i, j; | |
1285 | int x[2][2], tmp, a, b, aset, bset, rset; | |
1286 | ||
1287 | memset(x, 0, 4 * sizeof(int)); | |
1288 | ||
1289 | /* Trigger detect condition. */ | |
1290 | switch (oper) { | |
1291 | case OP_LEVEL: | |
1292 | x[0][1] = 1; | |
1293 | x[1][1] = 1; | |
1294 | break; | |
1295 | case OP_NOT: | |
1296 | x[0][0] = 1; | |
1297 | x[1][0] = 1; | |
1298 | break; | |
1299 | case OP_RISE: | |
1300 | x[0][1] = 1; | |
1301 | break; | |
1302 | case OP_FALL: | |
1303 | x[1][0] = 1; | |
1304 | break; | |
1305 | case OP_RISEFALL: | |
1306 | x[0][1] = 1; | |
1307 | x[1][0] = 1; | |
1308 | break; | |
1309 | case OP_NOTRISE: | |
1310 | x[1][1] = 1; | |
1311 | x[0][0] = 1; | |
1312 | x[1][0] = 1; | |
1313 | break; | |
1314 | case OP_NOTFALL: | |
1315 | x[1][1] = 1; | |
1316 | x[0][0] = 1; | |
1317 | x[0][1] = 1; | |
1318 | break; | |
1319 | case OP_NOTRISEFALL: | |
1320 | x[1][1] = 1; | |
1321 | x[0][0] = 1; | |
1322 | break; | |
1323 | } | |
1324 | ||
1325 | /* Transpose if neg is set. */ | |
1326 | if (neg) { | |
1327 | for (i = 0; i < 2; ++i) { | |
1328 | for (j = 0; j < 2; ++j) { | |
1329 | tmp = x[i][j]; | |
1330 | x[i][j] = x[1-i][1-j]; | |
1331 | x[1-i][1-j] = tmp; | |
1332 | } | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | /* Update mask with function. */ | |
1337 | for (i = 0; i < 16; ++i) { | |
1338 | a = (i >> (2 * index + 0)) & 1; | |
1339 | b = (i >> (2 * index + 1)) & 1; | |
1340 | ||
1341 | aset = (*mask >> i) & 1; | |
1342 | bset = x[b][a]; | |
1343 | ||
1344 | if (func == FUNC_AND || func == FUNC_NAND) | |
1345 | rset = aset & bset; | |
1346 | else if (func == FUNC_OR || func == FUNC_NOR) | |
1347 | rset = aset | bset; | |
1348 | else if (func == FUNC_XOR || func == FUNC_NXOR) | |
1349 | rset = aset ^ bset; | |
1350 | ||
1351 | if (func == FUNC_NAND || func == FUNC_NOR || func == FUNC_NXOR) | |
1352 | rset = !rset; | |
1353 | ||
1354 | *mask &= ~(1 << i); | |
1355 | ||
1356 | if (rset) | |
1357 | *mask |= 1 << i; | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Build trigger LUTs used by 50 MHz and lower sample rates for supporting | |
1363 | * simple pin change and state triggers. Only two transitions (rise/fall) can be | |
1364 | * set at any time, but a full mask and value can be set (0/1). | |
1365 | */ | |
1366 | static int build_basic_trigger(struct triggerlut *lut, struct dev_context *devc) | |
1367 | { | |
1368 | int i,j; | |
1369 | uint16_t masks[2] = { 0, 0 }; | |
1370 | ||
1371 | memset(lut, 0, sizeof(struct triggerlut)); | |
1372 | ||
1373 | /* Contant for simple triggers. */ | |
1374 | lut->m4 = 0xa000; | |
1375 | ||
1376 | /* Value/mask trigger support. */ | |
1377 | build_lut_entry(devc->trigger.simplevalue, devc->trigger.simplemask, | |
1378 | lut->m2d); | |
1379 | ||
1380 | /* Rise/fall trigger support. */ | |
1381 | for (i = 0, j = 0; i < 16; ++i) { | |
1382 | if (devc->trigger.risingmask & (1 << i) || | |
1383 | devc->trigger.fallingmask & (1 << i)) | |
1384 | masks[j++] = 1 << i; | |
1385 | } | |
1386 | ||
1387 | build_lut_entry(masks[0], masks[0], lut->m0d); | |
1388 | build_lut_entry(masks[1], masks[1], lut->m1d); | |
1389 | ||
1390 | /* Add glue logic */ | |
1391 | if (masks[0] || masks[1]) { | |
1392 | /* Transition trigger. */ | |
1393 | if (masks[0] & devc->trigger.risingmask) | |
1394 | add_trigger_function(OP_RISE, FUNC_OR, 0, 0, &lut->m3); | |
1395 | if (masks[0] & devc->trigger.fallingmask) | |
1396 | add_trigger_function(OP_FALL, FUNC_OR, 0, 0, &lut->m3); | |
1397 | if (masks[1] & devc->trigger.risingmask) | |
1398 | add_trigger_function(OP_RISE, FUNC_OR, 1, 0, &lut->m3); | |
1399 | if (masks[1] & devc->trigger.fallingmask) | |
1400 | add_trigger_function(OP_FALL, FUNC_OR, 1, 0, &lut->m3); | |
1401 | } else { | |
1402 | /* Only value/mask trigger. */ | |
1403 | lut->m3 = 0xffff; | |
1404 | } | |
1405 | ||
1406 | /* Triggertype: event. */ | |
1407 | lut->params.selres = 3; | |
1408 | ||
1409 | return SR_OK; | |
1410 | } | |
1411 | ||
1412 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
1413 | { | |
1414 | struct dev_context *devc; | |
1415 | struct clockselect_50 clockselect; | |
1416 | int frac, triggerpin, ret; | |
1417 | uint8_t triggerselect = 0; | |
1418 | struct triggerinout triggerinout_conf; | |
1419 | struct triggerlut lut; | |
1420 | ||
1421 | if (sdi->status != SR_ST_ACTIVE) | |
1422 | return SR_ERR_DEV_CLOSED; | |
1423 | ||
1424 | devc = sdi->priv; | |
1425 | ||
1426 | if (convert_trigger(sdi) != SR_OK) { | |
1427 | sr_err("Failed to configure triggers."); | |
1428 | return SR_ERR; | |
1429 | } | |
1430 | ||
1431 | /* If the samplerate has not been set, default to 200 kHz. */ | |
1432 | if (devc->cur_firmware == -1) { | |
1433 | if ((ret = set_samplerate(sdi, SR_KHZ(200))) != SR_OK) | |
1434 | return ret; | |
1435 | } | |
1436 | ||
1437 | /* Enter trigger programming mode. */ | |
1438 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc); | |
1439 | ||
1440 | /* 100 and 200 MHz mode. */ | |
1441 | if (devc->cur_samplerate >= SR_MHZ(100)) { | |
1442 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc); | |
1443 | ||
1444 | /* Find which pin to trigger on from mask. */ | |
1445 | for (triggerpin = 0; triggerpin < 8; ++triggerpin) | |
1446 | if ((devc->trigger.risingmask | devc->trigger.fallingmask) & | |
1447 | (1 << triggerpin)) | |
1448 | break; | |
1449 | ||
1450 | /* Set trigger pin and light LED on trigger. */ | |
1451 | triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7); | |
1452 | ||
1453 | /* Default rising edge. */ | |
1454 | if (devc->trigger.fallingmask) | |
1455 | triggerselect |= 1 << 3; | |
1456 | ||
1457 | /* All other modes. */ | |
1458 | } else if (devc->cur_samplerate <= SR_MHZ(50)) { | |
1459 | build_basic_trigger(&lut, devc); | |
1460 | ||
1461 | sigma_write_trigger_lut(&lut, devc); | |
1462 | ||
1463 | triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0); | |
1464 | } | |
1465 | ||
1466 | /* Setup trigger in and out pins to default values. */ | |
1467 | memset(&triggerinout_conf, 0, sizeof(struct triggerinout)); | |
1468 | triggerinout_conf.trgout_bytrigger = 1; | |
1469 | triggerinout_conf.trgout_enable = 1; | |
1470 | ||
1471 | sigma_write_register(WRITE_TRIGGER_OPTION, | |
1472 | (uint8_t *) &triggerinout_conf, | |
1473 | sizeof(struct triggerinout), devc); | |
1474 | ||
1475 | /* Go back to normal mode. */ | |
1476 | sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc); | |
1477 | ||
1478 | /* Set clock select register. */ | |
1479 | if (devc->cur_samplerate == SR_MHZ(200)) | |
1480 | /* Enable 4 channels. */ | |
1481 | sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc); | |
1482 | else if (devc->cur_samplerate == SR_MHZ(100)) | |
1483 | /* Enable 8 channels. */ | |
1484 | sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc); | |
1485 | else { | |
1486 | /* | |
1487 | * 50 MHz mode (or fraction thereof). Any fraction down to | |
1488 | * 50 MHz / 256 can be used, but is not supported by sigrok API. | |
1489 | */ | |
1490 | frac = SR_MHZ(50) / devc->cur_samplerate - 1; | |
1491 | ||
1492 | clockselect.async = 0; | |
1493 | clockselect.fraction = frac; | |
1494 | clockselect.disabled_channels = 0; | |
1495 | ||
1496 | sigma_write_register(WRITE_CLOCK_SELECT, | |
1497 | (uint8_t *) &clockselect, | |
1498 | sizeof(clockselect), devc); | |
1499 | } | |
1500 | ||
1501 | /* Setup maximum post trigger time. */ | |
1502 | sigma_set_register(WRITE_POST_TRIGGER, | |
1503 | (devc->capture_ratio * 255) / 100, devc); | |
1504 | ||
1505 | /* Start acqusition. */ | |
1506 | gettimeofday(&devc->start_tv, 0); | |
1507 | sigma_set_register(WRITE_MODE, 0x0d, devc); | |
1508 | ||
1509 | devc->cb_data = cb_data; | |
1510 | ||
1511 | /* Send header packet to the session bus. */ | |
1512 | std_session_send_df_header(sdi, LOG_PREFIX); | |
1513 | ||
1514 | /* Add capture source. */ | |
1515 | sr_session_source_add(sdi->session, 0, G_IO_IN, 10, receive_data, (void *)sdi); | |
1516 | ||
1517 | devc->state.state = SIGMA_CAPTURE; | |
1518 | ||
1519 | return SR_OK; | |
1520 | } | |
1521 | ||
1522 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
1523 | { | |
1524 | struct dev_context *devc; | |
1525 | ||
1526 | (void)cb_data; | |
1527 | ||
1528 | devc = sdi->priv; | |
1529 | devc->state.state = SIGMA_IDLE; | |
1530 | ||
1531 | sr_session_source_remove(sdi->session, 0); | |
1532 | ||
1533 | return SR_OK; | |
1534 | } | |
1535 | ||
1536 | SR_PRIV struct sr_dev_driver asix_sigma_driver_info = { | |
1537 | .name = "asix-sigma", | |
1538 | .longname = "ASIX SIGMA/SIGMA2", | |
1539 | .api_version = 1, | |
1540 | .init = init, | |
1541 | .cleanup = cleanup, | |
1542 | .scan = scan, | |
1543 | .dev_list = dev_list, | |
1544 | .dev_clear = dev_clear, | |
1545 | .config_get = config_get, | |
1546 | .config_set = config_set, | |
1547 | .config_list = config_list, | |
1548 | .dev_open = dev_open, | |
1549 | .dev_close = dev_close, | |
1550 | .dev_acquisition_start = dev_acquisition_start, | |
1551 | .dev_acquisition_stop = dev_acquisition_stop, | |
1552 | .priv = NULL, | |
1553 | }; |