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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | SR_PRIV int send_shortcommand(struct sr_serial_dev_inst *serial, | |
24 | uint8_t command) | |
25 | { | |
26 | char buf[1]; | |
27 | ||
28 | sr_dbg("Sending cmd 0x%.2x.", command); | |
29 | buf[0] = command; | |
30 | if (serial_write_blocking(serial, buf, 1, serial_timeout(serial, 1)) != 1) | |
31 | return SR_ERR; | |
32 | ||
33 | if (serial_drain(serial) != 0) | |
34 | return SR_ERR; | |
35 | ||
36 | return SR_OK; | |
37 | } | |
38 | ||
39 | SR_PRIV int send_longcommand(struct sr_serial_dev_inst *serial, | |
40 | uint8_t command, uint8_t *data) | |
41 | { | |
42 | char buf[5]; | |
43 | ||
44 | sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command, | |
45 | data[0], data[1], data[2], data[3]); | |
46 | buf[0] = command; | |
47 | buf[1] = data[0]; | |
48 | buf[2] = data[1]; | |
49 | buf[3] = data[2]; | |
50 | buf[4] = data[3]; | |
51 | if (serial_write_blocking(serial, buf, 5, serial_timeout(serial, 1)) != 5) | |
52 | return SR_ERR; | |
53 | ||
54 | if (serial_drain(serial) != 0) | |
55 | return SR_ERR; | |
56 | ||
57 | return SR_OK; | |
58 | } | |
59 | ||
60 | SR_PRIV int ols_send_reset(struct sr_serial_dev_inst *serial) | |
61 | { | |
62 | unsigned int i; | |
63 | ||
64 | for (i = 0; i < 5; i++) { | |
65 | if (send_shortcommand(serial, CMD_RESET) != SR_OK) | |
66 | return SR_ERR; | |
67 | } | |
68 | ||
69 | return SR_OK; | |
70 | } | |
71 | ||
72 | /* Configures the channel mask based on which channels are enabled. */ | |
73 | SR_PRIV void ols_channel_mask(const struct sr_dev_inst *sdi) | |
74 | { | |
75 | struct dev_context *devc; | |
76 | struct sr_channel *channel; | |
77 | const GSList *l; | |
78 | ||
79 | devc = sdi->priv; | |
80 | ||
81 | devc->channel_mask = 0; | |
82 | for (l = sdi->channels; l; l = l->next) { | |
83 | channel = l->data; | |
84 | if (channel->enabled) | |
85 | devc->channel_mask |= 1 << channel->index; | |
86 | } | |
87 | } | |
88 | ||
89 | SR_PRIV int ols_convert_trigger(const struct sr_dev_inst *sdi) | |
90 | { | |
91 | struct dev_context *devc; | |
92 | struct sr_trigger *trigger; | |
93 | struct sr_trigger_stage *stage; | |
94 | struct sr_trigger_match *match; | |
95 | const GSList *l, *m; | |
96 | int i; | |
97 | ||
98 | devc = sdi->priv; | |
99 | ||
100 | devc->num_stages = 0; | |
101 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
102 | devc->trigger_mask[i] = 0; | |
103 | devc->trigger_value[i] = 0; | |
104 | } | |
105 | ||
106 | if (!(trigger = sr_session_trigger_get(sdi->session))) | |
107 | return SR_OK; | |
108 | ||
109 | devc->num_stages = g_slist_length(trigger->stages); | |
110 | if (devc->num_stages > NUM_TRIGGER_STAGES) { | |
111 | sr_err("This device only supports %d trigger stages.", | |
112 | NUM_TRIGGER_STAGES); | |
113 | return SR_ERR; | |
114 | } | |
115 | ||
116 | for (l = trigger->stages; l; l = l->next) { | |
117 | stage = l->data; | |
118 | for (m = stage->matches; m; m = m->next) { | |
119 | match = m->data; | |
120 | if (!match->channel->enabled) | |
121 | /* Ignore disabled channels with a trigger. */ | |
122 | continue; | |
123 | devc->trigger_mask[stage->stage] |= 1 << match->channel->index; | |
124 | if (match->match == SR_TRIGGER_ONE) | |
125 | devc->trigger_value[stage->stage] |= 1 << match->channel->index; | |
126 | } | |
127 | } | |
128 | ||
129 | return SR_OK; | |
130 | } | |
131 | ||
132 | SR_PRIV struct dev_context *ols_dev_new(void) | |
133 | { | |
134 | struct dev_context *devc; | |
135 | ||
136 | devc = g_malloc0(sizeof(struct dev_context)); | |
137 | ||
138 | /* Device-specific settings */ | |
139 | devc->max_samples = devc->max_samplerate = devc->protocol_version = 0; | |
140 | ||
141 | /* Acquisition settings */ | |
142 | devc->limit_samples = devc->capture_ratio = 0; | |
143 | devc->trigger_at = -1; | |
144 | devc->flag_reg = 0; | |
145 | ||
146 | return devc; | |
147 | } | |
148 | ||
149 | static void ols_channel_new(struct sr_dev_inst *sdi, int num_chan) | |
150 | { | |
151 | struct dev_context *devc = sdi->priv; | |
152 | int i; | |
153 | ||
154 | for (i = 0; i < num_chan; i++) | |
155 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
156 | ols_channel_names[i]); | |
157 | ||
158 | devc->max_channels = num_chan; | |
159 | } | |
160 | ||
161 | SR_PRIV struct sr_dev_inst *get_metadata(struct sr_serial_dev_inst *serial) | |
162 | { | |
163 | struct sr_dev_inst *sdi; | |
164 | struct dev_context *devc; | |
165 | uint32_t tmp_int; | |
166 | uint8_t key, type, token; | |
167 | int delay_ms; | |
168 | GString *tmp_str, *devname, *version; | |
169 | guchar tmp_c; | |
170 | ||
171 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
172 | sdi->status = SR_ST_INACTIVE; | |
173 | devc = ols_dev_new(); | |
174 | sdi->priv = devc; | |
175 | ||
176 | devname = g_string_new(""); | |
177 | version = g_string_new(""); | |
178 | ||
179 | key = 0xff; | |
180 | while (key) { | |
181 | delay_ms = serial_timeout(serial, 1); | |
182 | if (serial_read_blocking(serial, &key, 1, delay_ms) != 1) | |
183 | break; | |
184 | if (key == 0x00) { | |
185 | sr_dbg("Got metadata key 0x00, metadata ends."); | |
186 | break; | |
187 | } | |
188 | type = key >> 5; | |
189 | token = key & 0x1f; | |
190 | switch (type) { | |
191 | case 0: | |
192 | /* NULL-terminated string */ | |
193 | tmp_str = g_string_new(""); | |
194 | delay_ms = serial_timeout(serial, 1); | |
195 | while (serial_read_blocking(serial, &tmp_c, 1, delay_ms) == 1 && tmp_c != '\0') | |
196 | g_string_append_c(tmp_str, tmp_c); | |
197 | sr_dbg("Got metadata key 0x%.2x value '%s'.", | |
198 | key, tmp_str->str); | |
199 | switch (token) { | |
200 | case 0x01: | |
201 | /* Device name */ | |
202 | devname = g_string_append(devname, tmp_str->str); | |
203 | break; | |
204 | case 0x02: | |
205 | /* FPGA firmware version */ | |
206 | if (version->len) | |
207 | g_string_append(version, ", "); | |
208 | g_string_append(version, "FPGA version "); | |
209 | g_string_append(version, tmp_str->str); | |
210 | break; | |
211 | case 0x03: | |
212 | /* Ancillary version */ | |
213 | if (version->len) | |
214 | g_string_append(version, ", "); | |
215 | g_string_append(version, "Ancillary version "); | |
216 | g_string_append(version, tmp_str->str); | |
217 | break; | |
218 | default: | |
219 | sr_info("ols: unknown token 0x%.2x: '%s'", | |
220 | token, tmp_str->str); | |
221 | break; | |
222 | } | |
223 | g_string_free(tmp_str, TRUE); | |
224 | break; | |
225 | case 1: | |
226 | /* 32-bit unsigned integer */ | |
227 | delay_ms = serial_timeout(serial, 4); | |
228 | if (serial_read_blocking(serial, &tmp_int, 4, delay_ms) != 4) | |
229 | break; | |
230 | tmp_int = RB32(&tmp_int); | |
231 | sr_dbg("Got metadata key 0x%.2x value 0x%.8x.", | |
232 | key, tmp_int); | |
233 | switch (token) { | |
234 | case 0x00: | |
235 | /* Number of usable channels */ | |
236 | ols_channel_new(sdi, tmp_int); | |
237 | break; | |
238 | case 0x01: | |
239 | /* Amount of sample memory available (bytes) */ | |
240 | devc->max_samples = tmp_int; | |
241 | break; | |
242 | case 0x02: | |
243 | /* Amount of dynamic memory available (bytes) */ | |
244 | /* what is this for? */ | |
245 | break; | |
246 | case 0x03: | |
247 | /* Maximum sample rate (Hz) */ | |
248 | devc->max_samplerate = tmp_int; | |
249 | break; | |
250 | case 0x04: | |
251 | /* protocol version */ | |
252 | devc->protocol_version = tmp_int; | |
253 | break; | |
254 | default: | |
255 | sr_info("Unknown token 0x%.2x: 0x%.8x.", | |
256 | token, tmp_int); | |
257 | break; | |
258 | } | |
259 | break; | |
260 | case 2: | |
261 | /* 8-bit unsigned integer */ | |
262 | delay_ms = serial_timeout(serial, 1); | |
263 | if (serial_read_blocking(serial, &tmp_c, 1, delay_ms) != 1) | |
264 | break; | |
265 | sr_dbg("Got metadata key 0x%.2x value 0x%.2x.", | |
266 | key, tmp_c); | |
267 | switch (token) { | |
268 | case 0x00: | |
269 | /* Number of usable channels */ | |
270 | ols_channel_new(sdi, tmp_c); | |
271 | break; | |
272 | case 0x01: | |
273 | /* protocol version */ | |
274 | devc->protocol_version = tmp_c; | |
275 | break; | |
276 | default: | |
277 | sr_info("Unknown token 0x%.2x: 0x%.2x.", | |
278 | token, tmp_c); | |
279 | break; | |
280 | } | |
281 | break; | |
282 | default: | |
283 | /* unknown type */ | |
284 | break; | |
285 | } | |
286 | } | |
287 | ||
288 | sdi->model = devname->str; | |
289 | sdi->version = version->str; | |
290 | g_string_free(devname, FALSE); | |
291 | g_string_free(version, FALSE); | |
292 | ||
293 | return sdi; | |
294 | } | |
295 | ||
296 | SR_PRIV int ols_set_samplerate(const struct sr_dev_inst *sdi, | |
297 | const uint64_t samplerate) | |
298 | { | |
299 | struct dev_context *devc; | |
300 | ||
301 | devc = sdi->priv; | |
302 | if (devc->max_samplerate && samplerate > devc->max_samplerate) | |
303 | return SR_ERR_SAMPLERATE; | |
304 | ||
305 | if (samplerate > CLOCK_RATE) { | |
306 | sr_info("Enabling demux mode."); | |
307 | devc->flag_reg |= FLAG_DEMUX; | |
308 | devc->flag_reg &= ~FLAG_FILTER; | |
309 | devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1; | |
310 | } else { | |
311 | sr_info("Disabling demux mode."); | |
312 | devc->flag_reg &= ~FLAG_DEMUX; | |
313 | devc->flag_reg |= FLAG_FILTER; | |
314 | devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1; | |
315 | } | |
316 | ||
317 | /* Calculate actual samplerate used and complain if it is different | |
318 | * from the requested. | |
319 | */ | |
320 | devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1); | |
321 | if (devc->flag_reg & FLAG_DEMUX) | |
322 | devc->cur_samplerate *= 2; | |
323 | if (devc->cur_samplerate != samplerate) | |
324 | sr_info("Can't match samplerate %" PRIu64 ", using %" | |
325 | PRIu64 ".", samplerate, devc->cur_samplerate); | |
326 | ||
327 | return SR_OK; | |
328 | } | |
329 | ||
330 | SR_PRIV void abort_acquisition(const struct sr_dev_inst *sdi) | |
331 | { | |
332 | struct sr_serial_dev_inst *serial; | |
333 | ||
334 | serial = sdi->conn; | |
335 | serial_source_remove(sdi->session, serial); | |
336 | ||
337 | std_session_send_df_end(sdi); | |
338 | } | |
339 | ||
340 | SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data) | |
341 | { | |
342 | struct dev_context *devc; | |
343 | struct sr_dev_inst *sdi; | |
344 | struct sr_serial_dev_inst *serial; | |
345 | struct sr_datafeed_packet packet; | |
346 | struct sr_datafeed_logic logic; | |
347 | uint32_t sample; | |
348 | int num_ols_changrp, offset, j; | |
349 | unsigned int i; | |
350 | unsigned char byte; | |
351 | ||
352 | (void)fd; | |
353 | ||
354 | sdi = cb_data; | |
355 | serial = sdi->conn; | |
356 | devc = sdi->priv; | |
357 | ||
358 | if (devc->num_transfers == 0 && revents == 0) { | |
359 | /* Ignore timeouts as long as we haven't received anything */ | |
360 | return TRUE; | |
361 | } | |
362 | ||
363 | if (devc->num_transfers++ == 0) { | |
364 | devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4); | |
365 | if (!devc->raw_sample_buf) { | |
366 | sr_err("Sample buffer malloc failed."); | |
367 | return FALSE; | |
368 | } | |
369 | /* fill with 1010... for debugging */ | |
370 | memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4); | |
371 | } | |
372 | ||
373 | num_ols_changrp = 0; | |
374 | for (i = 0x20; i > 0x02; i >>= 1) { | |
375 | if ((devc->flag_reg & i) == 0) { | |
376 | num_ols_changrp++; | |
377 | } | |
378 | } | |
379 | ||
380 | if (revents == G_IO_IN && devc->num_samples < devc->limit_samples) { | |
381 | if (serial_read_nonblocking(serial, &byte, 1) != 1) | |
382 | return FALSE; | |
383 | devc->cnt_bytes++; | |
384 | ||
385 | /* Ignore it if we've read enough. */ | |
386 | if (devc->num_samples >= devc->limit_samples) | |
387 | return TRUE; | |
388 | ||
389 | devc->sample[devc->num_bytes++] = byte; | |
390 | sr_spew("Received byte 0x%.2x.", byte); | |
391 | if (devc->num_bytes == num_ols_changrp) { | |
392 | devc->cnt_samples++; | |
393 | devc->cnt_samples_rle++; | |
394 | /* | |
395 | * Got a full sample. Convert from the OLS's little-endian | |
396 | * sample to the local format. | |
397 | */ | |
398 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
399 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
400 | sr_dbg("Received sample 0x%.*x.", devc->num_bytes * 2, sample); | |
401 | if (devc->flag_reg & FLAG_RLE) { | |
402 | /* | |
403 | * In RLE mode the high bit of the sample is the | |
404 | * "count" flag, meaning this sample is the number | |
405 | * of times the previous sample occurred. | |
406 | */ | |
407 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
408 | /* Clear the high bit. */ | |
409 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
410 | devc->rle_count = sample; | |
411 | devc->cnt_samples_rle += devc->rle_count; | |
412 | sr_dbg("RLE count: %u.", devc->rle_count); | |
413 | devc->num_bytes = 0; | |
414 | return TRUE; | |
415 | } | |
416 | } | |
417 | devc->num_samples += devc->rle_count + 1; | |
418 | if (devc->num_samples > devc->limit_samples) { | |
419 | /* Save us from overrunning the buffer. */ | |
420 | devc->rle_count -= devc->num_samples - devc->limit_samples; | |
421 | devc->num_samples = devc->limit_samples; | |
422 | } | |
423 | ||
424 | if (num_ols_changrp < 4) { | |
425 | /* | |
426 | * Some channel groups may have been turned | |
427 | * off, to speed up transfer between the | |
428 | * hardware and the PC. Expand that here before | |
429 | * submitting it over the session bus -- | |
430 | * whatever is listening on the bus will be | |
431 | * expecting a full 32-bit sample, based on | |
432 | * the number of channels. | |
433 | */ | |
434 | j = 0; | |
435 | memset(devc->tmp_sample, 0, 4); | |
436 | for (i = 0; i < 4; i++) { | |
437 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
438 | /* | |
439 | * This channel group was | |
440 | * enabled, copy from received | |
441 | * sample. | |
442 | */ | |
443 | devc->tmp_sample[i] = devc->sample[j++]; | |
444 | } else if (devc->flag_reg & FLAG_DEMUX && (i > 2)) { | |
445 | /* group 2 & 3 get added to 0 & 1 */ | |
446 | devc->tmp_sample[i - 2] = devc->sample[j++]; | |
447 | } | |
448 | } | |
449 | memcpy(devc->sample, devc->tmp_sample, 4); | |
450 | sr_spew("Expanded sample: 0x%.8x.", sample); | |
451 | } | |
452 | ||
453 | /* | |
454 | * the OLS sends its sample buffer backwards. | |
455 | * store it in reverse order here, so we can dump | |
456 | * this on the session bus later. | |
457 | */ | |
458 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
459 | for (i = 0; i <= devc->rle_count; i++) { | |
460 | memcpy(devc->raw_sample_buf + offset + (i * 4), | |
461 | devc->sample, 4); | |
462 | } | |
463 | memset(devc->sample, 0, 4); | |
464 | devc->num_bytes = 0; | |
465 | devc->rle_count = 0; | |
466 | } | |
467 | } else { | |
468 | /* | |
469 | * This is the main loop telling us a timeout was reached, or | |
470 | * we've acquired all the samples we asked for -- we're done. | |
471 | * Send the (properly-ordered) buffer to the frontend. | |
472 | */ | |
473 | sr_dbg("Received %d bytes, %d samples, %d decompressed samples.", | |
474 | devc->cnt_bytes, devc->cnt_samples, | |
475 | devc->cnt_samples_rle); | |
476 | if (devc->trigger_at != -1) { | |
477 | /* | |
478 | * A trigger was set up, so we need to tell the frontend | |
479 | * about it. | |
480 | */ | |
481 | if (devc->trigger_at > 0) { | |
482 | /* There are pre-trigger samples, send those first. */ | |
483 | packet.type = SR_DF_LOGIC; | |
484 | packet.payload = &logic; | |
485 | logic.length = devc->trigger_at * 4; | |
486 | logic.unitsize = 4; | |
487 | logic.data = devc->raw_sample_buf + | |
488 | (devc->limit_samples - devc->num_samples) * 4; | |
489 | sr_session_send(sdi, &packet); | |
490 | } | |
491 | ||
492 | /* Send the trigger. */ | |
493 | packet.type = SR_DF_TRIGGER; | |
494 | sr_session_send(sdi, &packet); | |
495 | ||
496 | /* Send post-trigger samples. */ | |
497 | packet.type = SR_DF_LOGIC; | |
498 | packet.payload = &logic; | |
499 | logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4); | |
500 | logic.unitsize = 4; | |
501 | logic.data = devc->raw_sample_buf + devc->trigger_at * 4 + | |
502 | (devc->limit_samples - devc->num_samples) * 4; | |
503 | sr_session_send(sdi, &packet); | |
504 | } else { | |
505 | /* no trigger was used */ | |
506 | packet.type = SR_DF_LOGIC; | |
507 | packet.payload = &logic; | |
508 | logic.length = devc->num_samples * 4; | |
509 | logic.unitsize = 4; | |
510 | logic.data = devc->raw_sample_buf + | |
511 | (devc->limit_samples - devc->num_samples) * 4; | |
512 | sr_session_send(sdi, &packet); | |
513 | } | |
514 | g_free(devc->raw_sample_buf); | |
515 | ||
516 | serial_flush(serial); | |
517 | abort_acquisition(sdi); | |
518 | } | |
519 | ||
520 | return TRUE; | |
521 | } |