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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "protocol.h" | |
22 | ||
23 | SR_PRIV struct sr_dev_driver chronovu_la_driver_info; | |
24 | static struct sr_dev_driver *di = &chronovu_la_driver_info; | |
25 | ||
26 | static const uint32_t devopts[] = { | |
27 | SR_CONF_LOGIC_ANALYZER, | |
28 | SR_CONF_LIMIT_MSEC | SR_CONF_SET, | |
29 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST, | |
30 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
31 | SR_CONF_TRIGGER_MATCH | SR_CONF_LIST, | |
32 | }; | |
33 | ||
34 | static const int32_t trigger_matches[] = { | |
35 | SR_TRIGGER_ZERO, | |
36 | SR_TRIGGER_ONE, | |
37 | SR_TRIGGER_RISING, | |
38 | SR_TRIGGER_FALLING, | |
39 | }; | |
40 | ||
41 | /* The ChronoVu LA8/LA16 can have multiple VID/PID pairs. */ | |
42 | static const struct { | |
43 | uint16_t vid; | |
44 | uint16_t pid; | |
45 | int model; | |
46 | const char *iproduct; | |
47 | } vid_pid[] = { | |
48 | { 0x0403, 0x6001, CHRONOVU_LA8, "ChronoVu LA8" }, | |
49 | { 0x0403, 0x8867, CHRONOVU_LA8, "ChronoVu LA8" }, | |
50 | { 0x0403, 0x6001, CHRONOVU_LA16, "ChronoVu LA16" }, | |
51 | { 0x0403, 0x8867, CHRONOVU_LA16, "ChronoVu LA16" }, | |
52 | }; | |
53 | ||
54 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
55 | ||
56 | static void clear_helper(void *priv) | |
57 | { | |
58 | struct dev_context *devc; | |
59 | ||
60 | devc = priv; | |
61 | ||
62 | ftdi_free(devc->ftdic); | |
63 | g_free(devc->final_buf); | |
64 | } | |
65 | ||
66 | static int dev_clear(const struct sr_dev_driver *di) | |
67 | { | |
68 | return std_dev_clear(di, clear_helper); | |
69 | } | |
70 | ||
71 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
72 | { | |
73 | return std_init(sr_ctx, di, LOG_PREFIX); | |
74 | } | |
75 | ||
76 | static int add_device(int idx, int model, GSList **devices) | |
77 | { | |
78 | int ret; | |
79 | unsigned int i; | |
80 | struct sr_dev_inst *sdi; | |
81 | struct drv_context *drvc; | |
82 | struct dev_context *devc; | |
83 | ||
84 | ret = SR_OK; | |
85 | ||
86 | drvc = di->priv; | |
87 | ||
88 | /* Allocate memory for our private device context. */ | |
89 | devc = g_malloc0(sizeof(struct dev_context)); | |
90 | ||
91 | /* Set some sane defaults. */ | |
92 | devc->prof = &cv_profiles[model]; | |
93 | devc->ftdic = NULL; /* Will be set in the open() API call. */ | |
94 | devc->cur_samplerate = 0; /* Set later (different for LA8/LA16). */ | |
95 | devc->limit_msec = 0; | |
96 | devc->limit_samples = 0; | |
97 | devc->cb_data = NULL; | |
98 | memset(devc->mangled_buf, 0, BS); | |
99 | devc->final_buf = NULL; | |
100 | devc->trigger_pattern = 0x0000; /* Irrelevant, see trigger_mask. */ | |
101 | devc->trigger_mask = 0x0000; /* All channels: "don't care". */ | |
102 | devc->trigger_edgemask = 0x0000; /* All channels: "state triggered". */ | |
103 | devc->trigger_found = 0; | |
104 | devc->done = 0; | |
105 | devc->block_counter = 0; | |
106 | devc->divcount = 0; | |
107 | devc->usb_vid = vid_pid[idx].vid; | |
108 | devc->usb_pid = vid_pid[idx].pid; | |
109 | memset(devc->samplerates, 0, sizeof(uint64_t) * 255); | |
110 | ||
111 | /* Allocate memory where we'll store the de-mangled data. */ | |
112 | if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) { | |
113 | sr_err("Failed to allocate memory for sample buffer."); | |
114 | ret = SR_ERR_MALLOC; | |
115 | goto err_free_devc; | |
116 | } | |
117 | ||
118 | /* We now know the device, set its max. samplerate as default. */ | |
119 | devc->cur_samplerate = devc->prof->max_samplerate; | |
120 | ||
121 | /* Register the device with libsigrok. */ | |
122 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
123 | sdi->status = SR_ST_INITIALIZING; | |
124 | sdi->vendor = g_strdup("ChronoVu"); | |
125 | sdi->model = g_strdup(devc->prof->modelname); | |
126 | sdi->driver = di; | |
127 | sdi->priv = devc; | |
128 | ||
129 | for (i = 0; i < devc->prof->num_channels; i++) | |
130 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
131 | cv_channel_names[i]); | |
132 | ||
133 | *devices = g_slist_append(*devices, sdi); | |
134 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
135 | ||
136 | if (ret == SR_OK) | |
137 | return SR_OK; | |
138 | ||
139 | err_free_devc: | |
140 | g_free(devc); | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
146 | { | |
147 | int ret; | |
148 | unsigned int i; | |
149 | GSList *devices; | |
150 | struct ftdi_context *ftdic; | |
151 | ||
152 | (void)di; | |
153 | (void)options; | |
154 | ||
155 | devices = NULL; | |
156 | ||
157 | /* Allocate memory for the FTDI context and initialize it. */ | |
158 | if (!(ftdic = ftdi_new())) { | |
159 | sr_err("Failed to initialize libftdi."); | |
160 | return NULL; | |
161 | } | |
162 | ||
163 | /* Check for LA8 and/or LA16 devices with various VID/PIDs. */ | |
164 | for (i = 0; i < ARRAY_SIZE(vid_pid); i++) { | |
165 | ret = ftdi_usb_open_desc(ftdic, vid_pid[i].vid, | |
166 | vid_pid[i].pid, vid_pid[i].iproduct, NULL); | |
167 | /* Show errors other than "device not found". */ | |
168 | if (ret < 0 && ret != -3) | |
169 | sr_dbg("Error finding/opening device (%d): %s.", | |
170 | ret, ftdi_get_error_string(ftdic)); | |
171 | if (ret < 0) | |
172 | continue; /* No device found, or not usable. */ | |
173 | ||
174 | sr_dbg("Found %s device (%04x:%04x).", | |
175 | vid_pid[i].iproduct, vid_pid[i].vid, vid_pid[i].pid); | |
176 | ||
177 | if ((ret = add_device(i, vid_pid[i].model, &devices)) < 0) | |
178 | sr_dbg("Failed to add device: %d.", ret); | |
179 | ||
180 | if ((ret = ftdi_usb_close(ftdic)) < 0) | |
181 | sr_dbg("Failed to close FTDI device (%d): %s.", | |
182 | ret, ftdi_get_error_string(ftdic)); | |
183 | } | |
184 | ||
185 | /* Close USB device, deinitialize and free the FTDI context. */ | |
186 | ftdi_free(ftdic); | |
187 | ftdic = NULL; | |
188 | ||
189 | return devices; | |
190 | } | |
191 | ||
192 | static GSList *dev_list(const struct sr_dev_driver *di) | |
193 | { | |
194 | return ((struct drv_context *)(di->priv))->instances; | |
195 | } | |
196 | ||
197 | static int dev_open(struct sr_dev_inst *sdi) | |
198 | { | |
199 | struct dev_context *devc; | |
200 | int ret; | |
201 | ||
202 | if (!(devc = sdi->priv)) | |
203 | return SR_ERR_BUG; | |
204 | ||
205 | /* Allocate memory for the FTDI context and initialize it. */ | |
206 | if (!(devc->ftdic = ftdi_new())) { | |
207 | sr_err("Failed to initialize libftdi."); | |
208 | return SR_ERR; | |
209 | } | |
210 | ||
211 | sr_dbg("Opening %s device (%04x:%04x).", devc->prof->modelname, | |
212 | devc->usb_vid, devc->usb_pid); | |
213 | ||
214 | /* Open the device. */ | |
215 | if ((ret = ftdi_usb_open_desc(devc->ftdic, devc->usb_vid, | |
216 | devc->usb_pid, devc->prof->iproduct, NULL)) < 0) { | |
217 | sr_err("Failed to open FTDI device (%d): %s.", | |
218 | ret, ftdi_get_error_string(devc->ftdic)); | |
219 | goto err_ftdi_free; | |
220 | } | |
221 | sr_dbg("Device opened successfully."); | |
222 | ||
223 | /* Purge RX/TX buffers in the FTDI chip. */ | |
224 | if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) { | |
225 | sr_err("Failed to purge FTDI buffers (%d): %s.", | |
226 | ret, ftdi_get_error_string(devc->ftdic)); | |
227 | goto err_ftdi_free; | |
228 | } | |
229 | sr_dbg("FTDI buffers purged successfully."); | |
230 | ||
231 | /* Enable flow control in the FTDI chip. */ | |
232 | if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) { | |
233 | sr_err("Failed to enable FTDI flow control (%d): %s.", | |
234 | ret, ftdi_get_error_string(devc->ftdic)); | |
235 | goto err_ftdi_free; | |
236 | } | |
237 | sr_dbg("FTDI flow control enabled successfully."); | |
238 | ||
239 | /* Wait 100ms. */ | |
240 | g_usleep(100 * 1000); | |
241 | ||
242 | sdi->status = SR_ST_ACTIVE; | |
243 | ||
244 | if (ret == SR_OK) | |
245 | return SR_OK; | |
246 | ||
247 | err_ftdi_free: | |
248 | ftdi_free(devc->ftdic); /* Close device (if open), free FTDI context. */ | |
249 | devc->ftdic = NULL; | |
250 | return ret; | |
251 | } | |
252 | ||
253 | static int dev_close(struct sr_dev_inst *sdi) | |
254 | { | |
255 | int ret; | |
256 | struct dev_context *devc; | |
257 | ||
258 | if (sdi->status != SR_ST_ACTIVE) | |
259 | return SR_OK; | |
260 | ||
261 | devc = sdi->priv; | |
262 | ||
263 | if (devc->ftdic && (ret = ftdi_usb_close(devc->ftdic)) < 0) | |
264 | sr_err("Failed to close FTDI device (%d): %s.", | |
265 | ret, ftdi_get_error_string(devc->ftdic)); | |
266 | sdi->status = SR_ST_INACTIVE; | |
267 | ||
268 | return SR_OK; | |
269 | } | |
270 | ||
271 | static int cleanup(const struct sr_dev_driver *di) | |
272 | { | |
273 | return dev_clear(di); | |
274 | } | |
275 | ||
276 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
277 | const struct sr_channel_group *cg) | |
278 | { | |
279 | struct dev_context *devc; | |
280 | ||
281 | (void)cg; | |
282 | ||
283 | switch (key) { | |
284 | case SR_CONF_SAMPLERATE: | |
285 | if (!sdi || !(devc = sdi->priv)) | |
286 | return SR_ERR_BUG; | |
287 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
288 | break; | |
289 | default: | |
290 | return SR_ERR_NA; | |
291 | } | |
292 | ||
293 | return SR_OK; | |
294 | } | |
295 | ||
296 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
297 | const struct sr_channel_group *cg) | |
298 | { | |
299 | struct dev_context *devc; | |
300 | ||
301 | (void)cg; | |
302 | ||
303 | if (sdi->status != SR_ST_ACTIVE) | |
304 | return SR_ERR_DEV_CLOSED; | |
305 | ||
306 | if (!(devc = sdi->priv)) | |
307 | return SR_ERR_BUG; | |
308 | ||
309 | switch (key) { | |
310 | case SR_CONF_SAMPLERATE: | |
311 | if (cv_set_samplerate(sdi, g_variant_get_uint64(data)) < 0) | |
312 | return SR_ERR; | |
313 | break; | |
314 | case SR_CONF_LIMIT_MSEC: | |
315 | if (g_variant_get_uint64(data) == 0) | |
316 | return SR_ERR_ARG; | |
317 | devc->limit_msec = g_variant_get_uint64(data); | |
318 | break; | |
319 | case SR_CONF_LIMIT_SAMPLES: | |
320 | if (g_variant_get_uint64(data) == 0) | |
321 | return SR_ERR_ARG; | |
322 | devc->limit_samples = g_variant_get_uint64(data); | |
323 | break; | |
324 | default: | |
325 | return SR_ERR_NA; | |
326 | } | |
327 | ||
328 | return SR_OK; | |
329 | } | |
330 | ||
331 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
332 | const struct sr_channel_group *cg) | |
333 | { | |
334 | GVariant *gvar, *grange[2]; | |
335 | GVariantBuilder gvb; | |
336 | struct dev_context *devc; | |
337 | ||
338 | (void)cg; | |
339 | ||
340 | switch (key) { | |
341 | case SR_CONF_DEVICE_OPTIONS: | |
342 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
343 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
344 | break; | |
345 | case SR_CONF_SAMPLERATE: | |
346 | if (!sdi || !sdi->priv || !(devc = sdi->priv)) | |
347 | return SR_ERR_BUG; | |
348 | cv_fill_samplerates_if_needed(sdi); | |
349 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
350 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
351 | devc->samplerates, | |
352 | ARRAY_SIZE(devc->samplerates), | |
353 | sizeof(uint64_t)); | |
354 | g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); | |
355 | *data = g_variant_builder_end(&gvb); | |
356 | break; | |
357 | case SR_CONF_LIMIT_SAMPLES: | |
358 | if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof) | |
359 | return SR_ERR_BUG; | |
360 | grange[0] = g_variant_new_uint64(0); | |
361 | if (devc->prof->model == CHRONOVU_LA8) | |
362 | grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES); | |
363 | else | |
364 | grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES / 2); | |
365 | *data = g_variant_new_tuple(grange, 2); | |
366 | break; | |
367 | case SR_CONF_TRIGGER_MATCH: | |
368 | if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof) | |
369 | return SR_ERR_BUG; | |
370 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
371 | trigger_matches, devc->prof->num_trigger_matches, | |
372 | sizeof(int32_t)); | |
373 | break; | |
374 | default: | |
375 | return SR_ERR_NA; | |
376 | } | |
377 | ||
378 | return SR_OK; | |
379 | } | |
380 | ||
381 | static int receive_data(int fd, int revents, void *cb_data) | |
382 | { | |
383 | int i, ret; | |
384 | struct sr_dev_inst *sdi; | |
385 | struct dev_context *devc; | |
386 | ||
387 | (void)fd; | |
388 | (void)revents; | |
389 | ||
390 | if (!(sdi = cb_data)) { | |
391 | sr_err("cb_data was NULL."); | |
392 | return FALSE; | |
393 | } | |
394 | ||
395 | if (!(devc = sdi->priv)) { | |
396 | sr_err("sdi->priv was NULL."); | |
397 | return FALSE; | |
398 | } | |
399 | ||
400 | if (!devc->ftdic) { | |
401 | sr_err("devc->ftdic was NULL."); | |
402 | return FALSE; | |
403 | } | |
404 | ||
405 | /* Get one block of data. */ | |
406 | if ((ret = cv_read_block(devc)) < 0) { | |
407 | sr_err("Failed to read data block: %d.", ret); | |
408 | dev_acquisition_stop(sdi, sdi); | |
409 | return FALSE; | |
410 | } | |
411 | ||
412 | /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */ | |
413 | if (devc->block_counter != (NUM_BLOCKS - 1)) { | |
414 | devc->block_counter++; | |
415 | return TRUE; | |
416 | } | |
417 | ||
418 | sr_dbg("Sampling finished, sending data to session bus now."); | |
419 | ||
420 | /* | |
421 | * All data was received and demangled, send it to the session bus. | |
422 | * | |
423 | * Note: Due to the method how data is spread across the 8MByte of | |
424 | * SDRAM, we can _not_ send it to the session bus in a streaming | |
425 | * manner while we receive it. We have to receive and de-mangle the | |
426 | * full 8MByte first, only then the whole buffer contains valid data. | |
427 | */ | |
428 | for (i = 0; i < NUM_BLOCKS; i++) | |
429 | cv_send_block_to_session_bus(devc, i); | |
430 | ||
431 | dev_acquisition_stop(sdi, sdi); | |
432 | ||
433 | return TRUE; | |
434 | } | |
435 | ||
436 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
437 | { | |
438 | struct dev_context *devc; | |
439 | uint8_t buf[8]; | |
440 | int bytes_to_write, bytes_written; | |
441 | ||
442 | if (sdi->status != SR_ST_ACTIVE) | |
443 | return SR_ERR_DEV_CLOSED; | |
444 | ||
445 | if (!(devc = sdi->priv)) { | |
446 | sr_err("sdi->priv was NULL."); | |
447 | return SR_ERR_BUG; | |
448 | } | |
449 | ||
450 | if (!devc->ftdic) { | |
451 | sr_err("devc->ftdic was NULL."); | |
452 | return SR_ERR_BUG; | |
453 | } | |
454 | ||
455 | devc->divcount = cv_samplerate_to_divcount(sdi, devc->cur_samplerate); | |
456 | if (devc->divcount == 0xff) { | |
457 | sr_err("Invalid divcount/samplerate."); | |
458 | return SR_ERR; | |
459 | } | |
460 | ||
461 | if (cv_convert_trigger(sdi) != SR_OK) { | |
462 | sr_err("Failed to configure trigger."); | |
463 | return SR_ERR; | |
464 | } | |
465 | ||
466 | /* Fill acquisition parameters into buf[]. */ | |
467 | if (devc->prof->model == CHRONOVU_LA8) { | |
468 | buf[0] = devc->divcount; | |
469 | buf[1] = 0xff; /* This byte must always be 0xff. */ | |
470 | buf[2] = devc->trigger_pattern & 0xff; | |
471 | buf[3] = devc->trigger_mask & 0xff; | |
472 | bytes_to_write = 4; | |
473 | } else { | |
474 | buf[0] = devc->divcount; | |
475 | buf[1] = 0xff; /* This byte must always be 0xff. */ | |
476 | buf[2] = (devc->trigger_pattern & 0xff00) >> 8; /* LSB */ | |
477 | buf[3] = (devc->trigger_pattern & 0x00ff) >> 0; /* MSB */ | |
478 | buf[4] = (devc->trigger_mask & 0xff00) >> 8; /* LSB */ | |
479 | buf[5] = (devc->trigger_mask & 0x00ff) >> 0; /* MSB */ | |
480 | buf[6] = (devc->trigger_edgemask & 0xff00) >> 8; /* LSB */ | |
481 | buf[7] = (devc->trigger_edgemask & 0x00ff) >> 0; /* MSB */ | |
482 | bytes_to_write = 8; | |
483 | } | |
484 | ||
485 | /* Start acquisition. */ | |
486 | bytes_written = cv_write(devc, buf, bytes_to_write); | |
487 | ||
488 | if (bytes_written < 0 || bytes_written != bytes_to_write) { | |
489 | sr_err("Acquisition failed to start."); | |
490 | return SR_ERR; | |
491 | } | |
492 | ||
493 | sr_dbg("Hardware acquisition started successfully."); | |
494 | ||
495 | devc->cb_data = cb_data; | |
496 | ||
497 | /* Send header packet to the session bus. */ | |
498 | std_session_send_df_header(sdi, LOG_PREFIX); | |
499 | ||
500 | /* Time when we should be done (for detecting trigger timeouts). */ | |
501 | devc->done = (devc->divcount + 1) * devc->prof->trigger_constant + | |
502 | g_get_monotonic_time() + (10 * G_TIME_SPAN_SECOND); | |
503 | devc->block_counter = 0; | |
504 | devc->trigger_found = 0; | |
505 | ||
506 | /* Hook up a dummy handler to receive data from the device. */ | |
507 | sr_session_source_add(sdi->session, -1, G_IO_IN, 0, receive_data, (void *)sdi); | |
508 | ||
509 | return SR_OK; | |
510 | } | |
511 | ||
512 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
513 | { | |
514 | struct sr_datafeed_packet packet; | |
515 | ||
516 | (void)cb_data; | |
517 | ||
518 | sr_dbg("Stopping acquisition."); | |
519 | sr_session_source_remove(sdi->session, -1); | |
520 | ||
521 | /* Send end packet to the session bus. */ | |
522 | sr_dbg("Sending SR_DF_END."); | |
523 | packet.type = SR_DF_END; | |
524 | sr_session_send(sdi, &packet); | |
525 | ||
526 | return SR_OK; | |
527 | } | |
528 | ||
529 | SR_PRIV struct sr_dev_driver chronovu_la_driver_info = { | |
530 | .name = "chronovu-la", | |
531 | .longname = "ChronoVu LA8/LA16", | |
532 | .api_version = 1, | |
533 | .init = init, | |
534 | .cleanup = cleanup, | |
535 | .scan = scan, | |
536 | .dev_list = dev_list, | |
537 | .dev_clear = dev_clear, | |
538 | .config_get = config_get, | |
539 | .config_set = config_set, | |
540 | .config_list = config_list, | |
541 | .dev_open = dev_open, | |
542 | .dev_close = dev_close, | |
543 | .dev_acquisition_start = dev_acquisition_start, | |
544 | .dev_acquisition_stop = dev_acquisition_stop, | |
545 | .priv = NULL, | |
546 | }; |