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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011-2012 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 <ftdi.h> | |
22 | #include <glib.h> | |
23 | #include <string.h> | |
24 | #include "libsigrok.h" | |
25 | #include "libsigrok-internal.h" | |
26 | #include "protocol.h" | |
27 | ||
28 | SR_PRIV struct sr_dev_driver chronovu_la8_driver_info; | |
29 | static struct sr_dev_driver *di = &chronovu_la8_driver_info; | |
30 | ||
31 | /* | |
32 | * This will be initialized via config_list()/SR_CONF_SAMPLERATE. | |
33 | * | |
34 | * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz | |
35 | * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz | |
36 | */ | |
37 | SR_PRIV uint64_t chronovu_la8_samplerates[255] = { 0 }; | |
38 | ||
39 | /* Note: Continuous sampling is not supported by the hardware. */ | |
40 | SR_PRIV const int32_t chronovu_la8_hwcaps[] = { | |
41 | SR_CONF_LOGIC_ANALYZER, | |
42 | SR_CONF_SAMPLERATE, | |
43 | SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */ | |
44 | SR_CONF_LIMIT_SAMPLES, /* TODO: Not yet implemented. */ | |
45 | }; | |
46 | ||
47 | /* | |
48 | * The ChronoVu LA8 can have multiple PIDs. Older versions shipped with | |
49 | * a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867. | |
50 | */ | |
51 | static const uint16_t usb_pids[] = { | |
52 | 0x6001, | |
53 | 0x8867, | |
54 | }; | |
55 | ||
56 | /* Function prototypes. */ | |
57 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
58 | ||
59 | static int clear_instances(void) | |
60 | { | |
61 | GSList *l; | |
62 | struct sr_dev_inst *sdi; | |
63 | struct drv_context *drvc; | |
64 | struct dev_context *devc; | |
65 | ||
66 | drvc = di->priv; | |
67 | ||
68 | /* Properly close all devices. */ | |
69 | for (l = drvc->instances; l; l = l->next) { | |
70 | if (!(sdi = l->data)) { | |
71 | /* Log error, but continue cleaning up the rest. */ | |
72 | sr_err("%s: sdi was NULL, continuing.", __func__); | |
73 | continue; | |
74 | } | |
75 | if (sdi->priv) { | |
76 | devc = sdi->priv; | |
77 | ftdi_free(devc->ftdic); | |
78 | } | |
79 | sr_dev_inst_free(sdi); | |
80 | } | |
81 | g_slist_free(drvc->instances); | |
82 | drvc->instances = NULL; | |
83 | ||
84 | return SR_OK; | |
85 | } | |
86 | ||
87 | static int hw_init(struct sr_context *sr_ctx) | |
88 | { | |
89 | return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN); | |
90 | } | |
91 | ||
92 | static GSList *hw_scan(GSList *options) | |
93 | { | |
94 | struct sr_dev_inst *sdi; | |
95 | struct sr_probe *probe; | |
96 | struct drv_context *drvc; | |
97 | struct dev_context *devc; | |
98 | GSList *devices; | |
99 | unsigned int i; | |
100 | int ret; | |
101 | ||
102 | (void)options; | |
103 | ||
104 | drvc = di->priv; | |
105 | ||
106 | devices = NULL; | |
107 | ||
108 | /* Allocate memory for our private device context. */ | |
109 | if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { | |
110 | sr_err("Device context malloc failed."); | |
111 | goto err_free_nothing; | |
112 | } | |
113 | ||
114 | /* Set some sane defaults. */ | |
115 | devc->ftdic = NULL; | |
116 | devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */ | |
117 | devc->limit_msec = 0; | |
118 | devc->limit_samples = 0; | |
119 | devc->cb_data = NULL; | |
120 | memset(devc->mangled_buf, 0, BS); | |
121 | devc->final_buf = NULL; | |
122 | devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */ | |
123 | devc->trigger_mask = 0x00; /* All probes are "don't care". */ | |
124 | devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */ | |
125 | devc->trigger_found = 0; | |
126 | devc->done = 0; | |
127 | devc->block_counter = 0; | |
128 | devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */ | |
129 | devc->usb_pid = 0; | |
130 | ||
131 | /* Allocate memory where we'll store the de-mangled data. */ | |
132 | if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) { | |
133 | sr_err("final_buf malloc failed."); | |
134 | goto err_free_devc; | |
135 | } | |
136 | ||
137 | /* Allocate memory for the FTDI context (ftdic) and initialize it. */ | |
138 | if (!(devc->ftdic = ftdi_new())) { | |
139 | sr_err("%s: ftdi_new failed.", __func__); | |
140 | goto err_free_final_buf; | |
141 | } | |
142 | ||
143 | /* Check for the device and temporarily open it. */ | |
144 | for (i = 0; i < ARRAY_SIZE(usb_pids); i++) { | |
145 | sr_dbg("Probing for VID/PID %04x:%04x.", USB_VENDOR_ID, | |
146 | usb_pids[i]); | |
147 | ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, | |
148 | usb_pids[i], USB_DESCRIPTION, NULL); | |
149 | if (ret == 0) { | |
150 | sr_dbg("Found LA8 device (%04x:%04x).", | |
151 | USB_VENDOR_ID, usb_pids[i]); | |
152 | devc->usb_pid = usb_pids[i]; | |
153 | } | |
154 | } | |
155 | ||
156 | if (devc->usb_pid == 0) | |
157 | goto err_free_ftdic; | |
158 | ||
159 | /* Register the device with libsigrok. */ | |
160 | sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING, | |
161 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
162 | if (!sdi) { | |
163 | sr_err("%s: sr_dev_inst_new failed.", __func__); | |
164 | goto err_close_ftdic; | |
165 | } | |
166 | sdi->driver = di; | |
167 | sdi->priv = devc; | |
168 | ||
169 | for (i = 0; chronovu_la8_probe_names[i]; i++) { | |
170 | if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, | |
171 | chronovu_la8_probe_names[i]))) | |
172 | return NULL; | |
173 | sdi->probes = g_slist_append(sdi->probes, probe); | |
174 | } | |
175 | ||
176 | devices = g_slist_append(devices, sdi); | |
177 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
178 | ||
179 | /* Close device. We'll reopen it again when we need it. */ | |
180 | (void) la8_close(devc); /* Log, but ignore errors. */ | |
181 | ||
182 | return devices; | |
183 | ||
184 | err_close_ftdic: | |
185 | (void) la8_close(devc); /* Log, but ignore errors. */ | |
186 | err_free_ftdic: | |
187 | ftdi_free(devc->ftdic); /* NOT free() or g_free()! */ | |
188 | err_free_final_buf: | |
189 | g_free(devc->final_buf); | |
190 | err_free_devc: | |
191 | g_free(devc); | |
192 | err_free_nothing: | |
193 | ||
194 | return NULL; | |
195 | } | |
196 | ||
197 | static GSList *hw_dev_list(void) | |
198 | { | |
199 | return ((struct drv_context *)(di->priv))->instances; | |
200 | } | |
201 | ||
202 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
203 | { | |
204 | struct dev_context *devc; | |
205 | int ret; | |
206 | ||
207 | if (!(devc = sdi->priv)) { | |
208 | sr_err("%s: sdi->priv was NULL.", __func__); | |
209 | return SR_ERR_BUG; | |
210 | } | |
211 | ||
212 | sr_dbg("Opening LA8 device (%04x:%04x).", USB_VENDOR_ID, | |
213 | devc->usb_pid); | |
214 | ||
215 | /* Open the device. */ | |
216 | if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, | |
217 | devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) { | |
218 | sr_err("%s: ftdi_usb_open_desc: (%d) %s", | |
219 | __func__, ret, ftdi_get_error_string(devc->ftdic)); | |
220 | (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ | |
221 | return SR_ERR; | |
222 | } | |
223 | sr_dbg("Device opened successfully."); | |
224 | ||
225 | /* Purge RX/TX buffers in the FTDI chip. */ | |
226 | if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) { | |
227 | sr_err("%s: ftdi_usb_purge_buffers: (%d) %s", | |
228 | __func__, ret, ftdi_get_error_string(devc->ftdic)); | |
229 | (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ | |
230 | goto err_dev_open_close_ftdic; | |
231 | } | |
232 | sr_dbg("FTDI buffers purged successfully."); | |
233 | ||
234 | /* Enable flow control in the FTDI chip. */ | |
235 | if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) { | |
236 | sr_err("%s: ftdi_setflowcontrol: (%d) %s", | |
237 | __func__, ret, ftdi_get_error_string(devc->ftdic)); | |
238 | (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ | |
239 | goto err_dev_open_close_ftdic; | |
240 | } | |
241 | sr_dbg("FTDI flow control enabled successfully."); | |
242 | ||
243 | /* Wait 100ms. */ | |
244 | g_usleep(100 * 1000); | |
245 | ||
246 | sdi->status = SR_ST_ACTIVE; | |
247 | ||
248 | return SR_OK; | |
249 | ||
250 | err_dev_open_close_ftdic: | |
251 | (void) la8_close(devc); /* Log, but ignore errors. */ | |
252 | return SR_ERR; | |
253 | } | |
254 | ||
255 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
256 | { | |
257 | struct dev_context *devc; | |
258 | ||
259 | devc = sdi->priv; | |
260 | ||
261 | if (sdi->status == SR_ST_ACTIVE) { | |
262 | sr_dbg("Status ACTIVE, closing device."); | |
263 | (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ | |
264 | } else { | |
265 | sr_spew("Status not ACTIVE, nothing to do."); | |
266 | } | |
267 | ||
268 | sdi->status = SR_ST_INACTIVE; | |
269 | ||
270 | g_free(devc->final_buf); | |
271 | ||
272 | return SR_OK; | |
273 | } | |
274 | ||
275 | static int hw_cleanup(void) | |
276 | { | |
277 | if (!di->priv) | |
278 | /* Can get called on an unused driver, doesn't matter. */ | |
279 | return SR_OK; | |
280 | ||
281 | clear_instances(); | |
282 | ||
283 | return SR_OK; | |
284 | } | |
285 | ||
286 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi) | |
287 | { | |
288 | struct dev_context *devc; | |
289 | ||
290 | switch (id) { | |
291 | case SR_CONF_SAMPLERATE: | |
292 | if (sdi) { | |
293 | devc = sdi->priv; | |
294 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
295 | sr_spew("%s: Returning samplerate: %" PRIu64 "Hz.", | |
296 | __func__, devc->cur_samplerate); | |
297 | } else | |
298 | return SR_ERR; | |
299 | break; | |
300 | default: | |
301 | return SR_ERR_NA; | |
302 | } | |
303 | ||
304 | return SR_OK; | |
305 | } | |
306 | ||
307 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi) | |
308 | { | |
309 | struct dev_context *devc; | |
310 | ||
311 | if (sdi->status != SR_ST_ACTIVE) | |
312 | return SR_ERR_DEV_CLOSED; | |
313 | ||
314 | if (!(devc = sdi->priv)) { | |
315 | sr_err("%s: sdi->priv was NULL.", __func__); | |
316 | return SR_ERR_BUG; | |
317 | } | |
318 | ||
319 | switch (id) { | |
320 | case SR_CONF_SAMPLERATE: | |
321 | if (set_samplerate(sdi, g_variant_get_uint64(data)) == SR_ERR) { | |
322 | sr_err("%s: setting samplerate failed.", __func__); | |
323 | return SR_ERR; | |
324 | } | |
325 | sr_dbg("SAMPLERATE = %" PRIu64, devc->cur_samplerate); | |
326 | break; | |
327 | case SR_CONF_LIMIT_MSEC: | |
328 | if (g_variant_get_uint64(data) == 0) { | |
329 | sr_err("%s: LIMIT_MSEC can't be 0.", __func__); | |
330 | return SR_ERR; | |
331 | } | |
332 | devc->limit_msec = g_variant_get_uint64(data); | |
333 | sr_dbg("LIMIT_MSEC = %" PRIu64, devc->limit_msec); | |
334 | break; | |
335 | case SR_CONF_LIMIT_SAMPLES: | |
336 | if (g_variant_get_uint64(data) < MIN_NUM_SAMPLES) { | |
337 | sr_err("%s: LIMIT_SAMPLES too small.", __func__); | |
338 | return SR_ERR; | |
339 | } | |
340 | devc->limit_samples = g_variant_get_uint64(data); | |
341 | sr_dbg("LIMIT_SAMPLES = %" PRIu64, devc->limit_samples); | |
342 | break; | |
343 | default: | |
344 | return SR_ERR_NA; | |
345 | } | |
346 | ||
347 | return SR_OK; | |
348 | } | |
349 | ||
350 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) | |
351 | { | |
352 | GVariant *gvar; | |
353 | GVariantBuilder gvb; | |
354 | ||
355 | (void)sdi; | |
356 | ||
357 | switch (key) { | |
358 | case SR_CONF_DEVICE_OPTIONS: | |
359 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
360 | chronovu_la8_hwcaps, | |
361 | ARRAY_SIZE(chronovu_la8_hwcaps), | |
362 | sizeof(int32_t)); | |
363 | break; | |
364 | case SR_CONF_SAMPLERATE: | |
365 | fill_supported_samplerates_if_needed(); | |
366 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
367 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
368 | chronovu_la8_samplerates, | |
369 | ARRAY_SIZE(chronovu_la8_samplerates), | |
370 | sizeof(uint64_t)); | |
371 | g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); | |
372 | *data = g_variant_builder_end(&gvb); | |
373 | break; | |
374 | case SR_CONF_TRIGGER_TYPE: | |
375 | *data = g_variant_new_string(TRIGGER_TYPE); | |
376 | break; | |
377 | default: | |
378 | return SR_ERR_NA; | |
379 | } | |
380 | ||
381 | return SR_OK; | |
382 | } | |
383 | ||
384 | static int receive_data(int fd, int revents, void *cb_data) | |
385 | { | |
386 | int i, ret; | |
387 | struct sr_dev_inst *sdi; | |
388 | struct dev_context *devc; | |
389 | ||
390 | (void)fd; | |
391 | (void)revents; | |
392 | ||
393 | if (!(sdi = cb_data)) { | |
394 | sr_err("%s: cb_data was NULL.", __func__); | |
395 | return FALSE; | |
396 | } | |
397 | ||
398 | if (!(devc = sdi->priv)) { | |
399 | sr_err("%s: sdi->priv was NULL.", __func__); | |
400 | return FALSE; | |
401 | } | |
402 | ||
403 | if (!devc->ftdic) { | |
404 | sr_err("%s: devc->ftdic was NULL.", __func__); | |
405 | return FALSE; | |
406 | } | |
407 | ||
408 | /* Get one block of data. */ | |
409 | if ((ret = la8_read_block(devc)) < 0) { | |
410 | sr_err("%s: la8_read_block error: %d.", __func__, ret); | |
411 | hw_dev_acquisition_stop(sdi, sdi); | |
412 | return FALSE; | |
413 | } | |
414 | ||
415 | /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */ | |
416 | if (devc->block_counter != (NUM_BLOCKS - 1)) { | |
417 | devc->block_counter++; | |
418 | return TRUE; | |
419 | } | |
420 | ||
421 | sr_dbg("Sampling finished, sending data to session bus now."); | |
422 | ||
423 | /* All data was received and demangled, send it to the session bus. */ | |
424 | for (i = 0; i < NUM_BLOCKS; i++) | |
425 | send_block_to_session_bus(devc, i); | |
426 | ||
427 | hw_dev_acquisition_stop(sdi, sdi); | |
428 | ||
429 | return TRUE; | |
430 | } | |
431 | ||
432 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
433 | void *cb_data) | |
434 | { | |
435 | struct dev_context *devc; | |
436 | uint8_t buf[4]; | |
437 | int bytes_written; | |
438 | ||
439 | if (sdi->status != SR_ST_ACTIVE) | |
440 | return SR_ERR_DEV_CLOSED; | |
441 | ||
442 | if (!(devc = sdi->priv)) { | |
443 | sr_err("%s: sdi->priv was NULL.", __func__); | |
444 | return SR_ERR_BUG; | |
445 | } | |
446 | ||
447 | if (!devc->ftdic) { | |
448 | sr_err("%s: devc->ftdic was NULL.", __func__); | |
449 | return SR_ERR_BUG; | |
450 | } | |
451 | ||
452 | devc->divcount = samplerate_to_divcount(devc->cur_samplerate); | |
453 | if (devc->divcount == 0xff) { | |
454 | sr_err("%s: Invalid divcount/samplerate.", __func__); | |
455 | return SR_ERR; | |
456 | } | |
457 | ||
458 | if (configure_probes(sdi) != SR_OK) { | |
459 | sr_err("Failed to configure probes."); | |
460 | return SR_ERR; | |
461 | } | |
462 | ||
463 | /* Fill acquisition parameters into buf[]. */ | |
464 | buf[0] = devc->divcount; | |
465 | buf[1] = 0xff; /* This byte must always be 0xff. */ | |
466 | buf[2] = devc->trigger_pattern; | |
467 | buf[3] = devc->trigger_mask; | |
468 | ||
469 | /* Start acquisition. */ | |
470 | bytes_written = la8_write(devc, buf, 4); | |
471 | ||
472 | if (bytes_written < 0) { | |
473 | sr_err("Acquisition failed to start: %d.", bytes_written); | |
474 | return SR_ERR; | |
475 | } else if (bytes_written != 4) { | |
476 | sr_err("Acquisition failed to start: %d.", bytes_written); | |
477 | return SR_ERR; | |
478 | } | |
479 | ||
480 | sr_dbg("Hardware acquisition started successfully."); | |
481 | ||
482 | devc->cb_data = cb_data; | |
483 | ||
484 | /* Send header packet to the session bus. */ | |
485 | std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN); | |
486 | ||
487 | /* Time when we should be done (for detecting trigger timeouts). */ | |
488 | devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL) | |
489 | + devc->trigger_timeout; | |
490 | devc->block_counter = 0; | |
491 | devc->trigger_found = 0; | |
492 | ||
493 | /* Hook up a dummy handler to receive data from the LA8. */ | |
494 | sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi); | |
495 | ||
496 | return SR_OK; | |
497 | } | |
498 | ||
499 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
500 | { | |
501 | struct sr_datafeed_packet packet; | |
502 | ||
503 | (void)sdi; | |
504 | ||
505 | sr_dbg("Stopping acquisition."); | |
506 | sr_source_remove(-1); | |
507 | ||
508 | /* Send end packet to the session bus. */ | |
509 | sr_dbg("Sending SR_DF_END."); | |
510 | packet.type = SR_DF_END; | |
511 | sr_session_send(cb_data, &packet); | |
512 | ||
513 | return SR_OK; | |
514 | } | |
515 | ||
516 | SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = { | |
517 | .name = "chronovu-la8", | |
518 | .longname = "ChronoVu LA8", | |
519 | .api_version = 1, | |
520 | .init = hw_init, | |
521 | .cleanup = hw_cleanup, | |
522 | .scan = hw_scan, | |
523 | .dev_list = hw_dev_list, | |
524 | .dev_clear = clear_instances, | |
525 | .config_get = config_get, | |
526 | .config_set = config_set, | |
527 | .config_list = config_list, | |
528 | .dev_open = hw_dev_open, | |
529 | .dev_close = hw_dev_close, | |
530 | .dev_acquisition_start = hw_dev_acquisition_start, | |
531 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
532 | .priv = NULL, | |
533 | }; |