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0aba65da UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 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 | ||
2239728c | 22 | extern SR_PRIV struct sr_dev_driver ols_driver_info; |
0aba65da UH |
23 | static struct sr_dev_driver *di = &ols_driver_info; |
24 | ||
25 | SR_PRIV int send_shortcommand(struct sr_serial_dev_inst *serial, | |
26 | uint8_t command) | |
27 | { | |
28 | char buf[1]; | |
29 | ||
30 | sr_dbg("Sending cmd 0x%.2x.", command); | |
31 | buf[0] = command; | |
32 | if (serial_write(serial, buf, 1) != 1) | |
33 | return SR_ERR; | |
34 | ||
35 | return SR_OK; | |
36 | } | |
37 | ||
38 | SR_PRIV int send_longcommand(struct sr_serial_dev_inst *serial, | |
39 | uint8_t command, uint32_t data) | |
40 | { | |
41 | char buf[5]; | |
42 | ||
43 | sr_dbg("Sending cmd 0x%.2x data 0x%.8x.", command, data); | |
44 | buf[0] = command; | |
45 | buf[1] = (data & 0xff000000) >> 24; | |
46 | buf[2] = (data & 0xff0000) >> 16; | |
47 | buf[3] = (data & 0xff00) >> 8; | |
48 | buf[4] = data & 0xff; | |
49 | if (serial_write(serial, buf, 5) != 5) | |
50 | return SR_ERR; | |
51 | ||
52 | return SR_OK; | |
53 | } | |
54 | ||
55 | SR_PRIV int ols_configure_probes(const struct sr_dev_inst *sdi) | |
56 | { | |
57 | struct dev_context *devc; | |
58 | const struct sr_probe *probe; | |
59 | const GSList *l; | |
60 | int probe_bit, stage, i; | |
61 | char *tc; | |
62 | ||
63 | devc = sdi->priv; | |
64 | ||
65 | devc->probe_mask = 0; | |
66 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
67 | devc->trigger_mask[i] = 0; | |
68 | devc->trigger_value[i] = 0; | |
69 | } | |
70 | ||
71 | devc->num_stages = 0; | |
72 | for (l = sdi->probes; l; l = l->next) { | |
73 | probe = (const struct sr_probe *)l->data; | |
74 | if (!probe->enabled) | |
75 | continue; | |
76 | ||
77 | /* | |
78 | * Set up the probe mask for later configuration into the | |
79 | * flag register. | |
80 | */ | |
81 | probe_bit = 1 << (probe->index); | |
82 | devc->probe_mask |= probe_bit; | |
83 | ||
84 | if (!probe->trigger) | |
85 | continue; | |
86 | ||
87 | /* Configure trigger mask and value. */ | |
88 | stage = 0; | |
89 | for (tc = probe->trigger; tc && *tc; tc++) { | |
90 | devc->trigger_mask[stage] |= probe_bit; | |
91 | if (*tc == '1') | |
92 | devc->trigger_value[stage] |= probe_bit; | |
93 | stage++; | |
94 | if (stage > 3) | |
95 | /* | |
96 | * TODO: Only supporting parallel mode, with | |
97 | * up to 4 stages. | |
98 | */ | |
99 | return SR_ERR; | |
100 | } | |
101 | if (stage > devc->num_stages) | |
102 | devc->num_stages = stage; | |
103 | } | |
104 | ||
105 | return SR_OK; | |
106 | } | |
107 | ||
108 | SR_PRIV uint32_t reverse16(uint32_t in) | |
109 | { | |
110 | uint32_t out; | |
111 | ||
112 | out = (in & 0xff) << 8; | |
113 | out |= (in & 0xff00) >> 8; | |
114 | out |= (in & 0xff0000) << 8; | |
115 | out |= (in & 0xff000000) >> 8; | |
116 | ||
117 | return out; | |
118 | } | |
119 | ||
120 | SR_PRIV uint32_t reverse32(uint32_t in) | |
121 | { | |
122 | uint32_t out; | |
123 | ||
124 | out = (in & 0xff) << 24; | |
125 | out |= (in & 0xff00) << 8; | |
126 | out |= (in & 0xff0000) >> 8; | |
127 | out |= (in & 0xff000000) >> 24; | |
128 | ||
129 | return out; | |
130 | } | |
131 | ||
132 | SR_PRIV struct dev_context *ols_dev_new(void) | |
133 | { | |
134 | struct dev_context *devc; | |
135 | ||
136 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { | |
137 | sr_err("Device context malloc failed."); | |
138 | return NULL; | |
139 | } | |
140 | ||
141 | devc->trigger_at = -1; | |
142 | devc->probe_mask = 0xffffffff; | |
143 | devc->cur_samplerate = SR_KHZ(200); | |
144 | devc->serial = NULL; | |
145 | ||
146 | return devc; | |
147 | } | |
148 | ||
149 | SR_PRIV struct sr_dev_inst *get_metadata(struct sr_serial_dev_inst *serial) | |
150 | { | |
151 | struct sr_dev_inst *sdi; | |
152 | struct dev_context *devc; | |
153 | struct sr_probe *probe; | |
154 | uint32_t tmp_int, ui; | |
155 | uint8_t key, type, token; | |
156 | GString *tmp_str, *devname, *version; | |
157 | guchar tmp_c; | |
158 | ||
159 | sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, NULL, NULL); | |
160 | sdi->driver = di; | |
161 | devc = ols_dev_new(); | |
162 | sdi->priv = devc; | |
163 | ||
164 | devname = g_string_new(""); | |
165 | version = g_string_new(""); | |
166 | ||
167 | key = 0xff; | |
168 | while (key) { | |
169 | if (serial_read(serial, &key, 1) != 1 || key == 0x00) | |
170 | break; | |
171 | type = key >> 5; | |
172 | token = key & 0x1f; | |
173 | switch (type) { | |
174 | case 0: | |
175 | /* NULL-terminated string */ | |
176 | tmp_str = g_string_new(""); | |
177 | while (serial_read(serial, &tmp_c, 1) == 1 && tmp_c != '\0') | |
178 | g_string_append_c(tmp_str, tmp_c); | |
179 | sr_dbg("Got metadata key 0x%.2x value '%s'.", | |
180 | key, tmp_str->str); | |
181 | switch (token) { | |
182 | case 0x01: | |
183 | /* Device name */ | |
184 | devname = g_string_append(devname, tmp_str->str); | |
185 | break; | |
186 | case 0x02: | |
187 | /* FPGA firmware version */ | |
188 | if (version->len) | |
189 | g_string_append(version, ", "); | |
190 | g_string_append(version, "FPGA version "); | |
191 | g_string_append(version, tmp_str->str); | |
192 | break; | |
193 | case 0x03: | |
194 | /* Ancillary version */ | |
195 | if (version->len) | |
196 | g_string_append(version, ", "); | |
197 | g_string_append(version, "Ancillary version "); | |
198 | g_string_append(version, tmp_str->str); | |
199 | break; | |
200 | default: | |
201 | sr_info("ols: unknown token 0x%.2x: '%s'", | |
202 | token, tmp_str->str); | |
203 | break; | |
204 | } | |
205 | g_string_free(tmp_str, TRUE); | |
206 | break; | |
207 | case 1: | |
208 | /* 32-bit unsigned integer */ | |
209 | if (serial_read(serial, &tmp_int, 4) != 4) | |
210 | break; | |
211 | tmp_int = reverse32(tmp_int); | |
212 | sr_dbg("Got metadata key 0x%.2x value 0x%.8x.", | |
213 | key, tmp_int); | |
214 | switch (token) { | |
215 | case 0x00: | |
216 | /* Number of usable probes */ | |
217 | for (ui = 0; ui < tmp_int; ui++) { | |
218 | if (!(probe = sr_probe_new(ui, SR_PROBE_LOGIC, TRUE, | |
219 | ols_probe_names[ui]))) | |
220 | return 0; | |
221 | sdi->probes = g_slist_append(sdi->probes, probe); | |
222 | } | |
223 | break; | |
224 | case 0x01: | |
225 | /* Amount of sample memory available (bytes) */ | |
226 | devc->max_samples = tmp_int; | |
227 | break; | |
228 | case 0x02: | |
229 | /* Amount of dynamic memory available (bytes) */ | |
230 | /* what is this for? */ | |
231 | break; | |
232 | case 0x03: | |
233 | /* Maximum sample rate (hz) */ | |
234 | devc->max_samplerate = tmp_int; | |
235 | break; | |
236 | case 0x04: | |
237 | /* protocol version */ | |
238 | devc->protocol_version = tmp_int; | |
239 | break; | |
240 | default: | |
241 | sr_info("Unknown token 0x%.2x: 0x%.8x.", | |
242 | token, tmp_int); | |
243 | break; | |
244 | } | |
245 | break; | |
246 | case 2: | |
247 | /* 8-bit unsigned integer */ | |
248 | if (serial_read(serial, &tmp_c, 1) != 1) | |
249 | break; | |
250 | sr_dbg("Got metadata key 0x%.2x value 0x%.2x.", | |
251 | key, tmp_c); | |
252 | switch (token) { | |
253 | case 0x00: | |
254 | /* Number of usable probes */ | |
255 | for (ui = 0; ui < tmp_c; ui++) { | |
256 | if (!(probe = sr_probe_new(ui, SR_PROBE_LOGIC, TRUE, | |
257 | ols_probe_names[ui]))) | |
258 | return 0; | |
259 | sdi->probes = g_slist_append(sdi->probes, probe); | |
260 | } | |
261 | break; | |
262 | case 0x01: | |
263 | /* protocol version */ | |
264 | devc->protocol_version = tmp_c; | |
265 | break; | |
266 | default: | |
267 | sr_info("Unknown token 0x%.2x: 0x%.2x.", | |
268 | token, tmp_c); | |
269 | break; | |
270 | } | |
271 | break; | |
272 | default: | |
273 | /* unknown type */ | |
274 | break; | |
275 | } | |
276 | } | |
277 | ||
278 | sdi->model = devname->str; | |
279 | sdi->version = version->str; | |
280 | g_string_free(devname, FALSE); | |
281 | g_string_free(version, FALSE); | |
282 | ||
283 | return sdi; | |
284 | } | |
285 | ||
286 | SR_PRIV int ols_set_samplerate(const struct sr_dev_inst *sdi, | |
287 | uint64_t samplerate, | |
288 | const struct sr_samplerates *samplerates) | |
289 | { | |
290 | struct dev_context *devc; | |
291 | ||
292 | devc = sdi->priv; | |
293 | if (devc->max_samplerate) { | |
294 | if (samplerate > devc->max_samplerate) | |
295 | return SR_ERR_SAMPLERATE; | |
296 | } else if (samplerate < samplerates->low || samplerate > samplerates->high) | |
297 | return SR_ERR_SAMPLERATE; | |
298 | ||
299 | if (samplerate > CLOCK_RATE) { | |
300 | devc->flag_reg |= FLAG_DEMUX; | |
301 | devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1; | |
302 | } else { | |
303 | devc->flag_reg &= ~FLAG_DEMUX; | |
304 | devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1; | |
305 | } | |
306 | ||
307 | /* Calculate actual samplerate used and complain if it is different | |
308 | * from the requested. | |
309 | */ | |
310 | devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1); | |
311 | if (devc->flag_reg & FLAG_DEMUX) | |
312 | devc->cur_samplerate *= 2; | |
313 | if (devc->cur_samplerate != samplerate) | |
314 | sr_err("Can't match samplerate %" PRIu64 ", using %" | |
315 | PRIu64 ".", samplerate, devc->cur_samplerate); | |
316 | ||
317 | return SR_OK; | |
318 | } | |
319 | ||
320 | SR_PRIV void abort_acquisition(const struct sr_dev_inst *sdi) | |
321 | { | |
322 | struct sr_datafeed_packet packet; | |
323 | struct dev_context *devc; | |
324 | ||
325 | devc = sdi->priv; | |
326 | sr_source_remove(devc->serial->fd); | |
327 | ||
328 | /* Terminate session */ | |
329 | packet.type = SR_DF_END; | |
330 | sr_session_send(sdi, &packet); | |
331 | } | |
332 | ||
333 | SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data) | |
334 | { | |
335 | struct sr_datafeed_packet packet; | |
336 | struct sr_datafeed_logic logic; | |
337 | struct sr_dev_inst *sdi; | |
338 | struct drv_context *drvc; | |
339 | struct dev_context *devc; | |
340 | GSList *l; | |
341 | int num_channels, offset, i, j; | |
342 | unsigned char byte; | |
343 | ||
344 | drvc = di->priv; | |
345 | ||
346 | /* Find this device's devc struct by its fd. */ | |
347 | devc = NULL; | |
348 | for (l = drvc->instances; l; l = l->next) { | |
349 | sdi = l->data; | |
350 | devc = sdi->priv; | |
351 | if (devc->serial->fd == fd) | |
352 | break; | |
353 | devc = NULL; | |
354 | } | |
355 | if (!devc) | |
356 | /* Shouldn't happen. */ | |
357 | return TRUE; | |
358 | ||
359 | if (devc->num_transfers++ == 0) { | |
360 | /* | |
361 | * First time round, means the device started sending data, | |
362 | * and will not stop until done. If it stops sending for | |
363 | * longer than it takes to send a byte, that means it's | |
364 | * finished. We'll double that to 30ms to be sure... | |
365 | */ | |
366 | sr_source_remove(fd); | |
367 | sr_source_add(fd, G_IO_IN, 30, ols_receive_data, cb_data); | |
368 | devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4); | |
369 | if (!devc->raw_sample_buf) { | |
370 | sr_err("Sample buffer malloc failed."); | |
371 | return FALSE; | |
372 | } | |
373 | /* fill with 1010... for debugging */ | |
374 | memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4); | |
375 | } | |
376 | ||
377 | num_channels = 0; | |
378 | for (i = 0x20; i > 0x02; i /= 2) { | |
379 | if ((devc->flag_reg & i) == 0) | |
380 | num_channels++; | |
381 | } | |
382 | ||
383 | if (revents == G_IO_IN) { | |
384 | if (serial_read(devc->serial, &byte, 1) != 1) | |
385 | return FALSE; | |
386 | ||
387 | /* Ignore it if we've read enough. */ | |
388 | if (devc->num_samples >= devc->limit_samples) | |
389 | return TRUE; | |
390 | ||
391 | devc->sample[devc->num_bytes++] = byte; | |
392 | sr_dbg("Received byte 0x%.2x.", byte); | |
393 | if (devc->num_bytes == num_channels) { | |
394 | /* Got a full sample. */ | |
395 | sr_dbg("Received sample 0x%.*x.", | |
396 | devc->num_bytes * 2, *(int *)devc->sample); | |
397 | if (devc->flag_reg & FLAG_RLE) { | |
398 | /* | |
399 | * In RLE mode -1 should never come in as a | |
400 | * sample, because bit 31 is the "count" flag. | |
401 | */ | |
402 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
403 | devc->sample[devc->num_bytes - 1] &= 0x7f; | |
404 | /* | |
405 | * FIXME: This will only work on | |
406 | * little-endian systems. | |
407 | */ | |
408 | devc->rle_count = *(int *)(devc->sample); | |
409 | sr_dbg("RLE count: %d.", devc->rle_count); | |
410 | devc->num_bytes = 0; | |
411 | return TRUE; | |
412 | } | |
413 | } | |
414 | devc->num_samples += devc->rle_count + 1; | |
415 | if (devc->num_samples > devc->limit_samples) { | |
416 | /* Save us from overrunning the buffer. */ | |
417 | devc->rle_count -= devc->num_samples - devc->limit_samples; | |
418 | devc->num_samples = devc->limit_samples; | |
419 | } | |
420 | ||
421 | if (num_channels < 4) { | |
422 | /* | |
423 | * Some channel groups may have been turned | |
424 | * off, to speed up transfer between the | |
425 | * hardware and the PC. Expand that here before | |
426 | * submitting it over the session bus -- | |
427 | * whatever is listening on the bus will be | |
428 | * expecting a full 32-bit sample, based on | |
429 | * the number of probes. | |
430 | */ | |
431 | j = 0; | |
432 | memset(devc->tmp_sample, 0, 4); | |
433 | for (i = 0; i < 4; i++) { | |
434 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
435 | /* | |
436 | * This channel group was | |
437 | * enabled, copy from received | |
438 | * sample. | |
439 | */ | |
440 | devc->tmp_sample[i] = devc->sample[j++]; | |
441 | } | |
442 | } | |
443 | memcpy(devc->sample, devc->tmp_sample, 4); | |
444 | sr_dbg("Full sample: 0x%.8x.", *(int *)devc->sample); | |
445 | } | |
446 | ||
447 | /* the OLS sends its sample buffer backwards. | |
448 | * store it in reverse order here, so we can dump | |
449 | * this on the session bus later. | |
450 | */ | |
451 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
452 | for (i = 0; i <= devc->rle_count; i++) { | |
453 | memcpy(devc->raw_sample_buf + offset + (i * 4), | |
454 | devc->sample, 4); | |
455 | } | |
456 | memset(devc->sample, 0, 4); | |
457 | devc->num_bytes = 0; | |
458 | devc->rle_count = 0; | |
459 | } | |
460 | } else { | |
461 | /* | |
462 | * This is the main loop telling us a timeout was reached, or | |
463 | * we've acquired all the samples we asked for -- we're done. | |
464 | * Send the (properly-ordered) buffer to the frontend. | |
465 | */ | |
466 | if (devc->trigger_at != -1) { | |
467 | /* a trigger was set up, so we need to tell the frontend | |
468 | * about it. | |
469 | */ | |
470 | if (devc->trigger_at > 0) { | |
471 | /* there are pre-trigger samples, send those first */ | |
472 | packet.type = SR_DF_LOGIC; | |
473 | packet.payload = &logic; | |
474 | logic.length = devc->trigger_at * 4; | |
475 | logic.unitsize = 4; | |
476 | logic.data = devc->raw_sample_buf + | |
477 | (devc->limit_samples - devc->num_samples) * 4; | |
478 | sr_session_send(cb_data, &packet); | |
479 | } | |
480 | ||
481 | /* send the trigger */ | |
482 | packet.type = SR_DF_TRIGGER; | |
483 | sr_session_send(cb_data, &packet); | |
484 | ||
485 | /* send post-trigger samples */ | |
486 | packet.type = SR_DF_LOGIC; | |
487 | packet.payload = &logic; | |
488 | logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4); | |
489 | logic.unitsize = 4; | |
490 | logic.data = devc->raw_sample_buf + devc->trigger_at * 4 + | |
491 | (devc->limit_samples - devc->num_samples) * 4; | |
492 | sr_session_send(cb_data, &packet); | |
493 | } else { | |
494 | /* no trigger was used */ | |
495 | packet.type = SR_DF_LOGIC; | |
496 | packet.payload = &logic; | |
497 | logic.length = devc->num_samples * 4; | |
498 | logic.unitsize = 4; | |
499 | logic.data = devc->raw_sample_buf + | |
500 | (devc->limit_samples - devc->num_samples) * 4; | |
501 | sr_session_send(cb_data, &packet); | |
502 | } | |
503 | g_free(devc->raw_sample_buf); | |
504 | ||
505 | serial_flush(devc->serial); | |
506 | abort_acquisition(sdi); | |
507 | serial_close(devc->serial); | |
508 | } | |
509 | ||
510 | return TRUE; | |
511 | } |