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