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2f937611 UH |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include "protocol.h" | |
22 | ||
23 | /* Protocol commands */ | |
24 | #define CMD_GET_FW_VERSION 0xb0 | |
25 | #define CMD_START 0xb1 | |
26 | #define CMD_GET_REVID_VERSION 0xb2 | |
27 | ||
28 | #define CMD_START_FLAGS_WIDE_POS 5 | |
29 | #define CMD_START_FLAGS_CLK_SRC_POS 6 | |
30 | ||
31 | #define CMD_START_FLAGS_SAMPLE_8BIT (0 << CMD_START_FLAGS_WIDE_POS) | |
32 | #define CMD_START_FLAGS_SAMPLE_16BIT (1 << CMD_START_FLAGS_WIDE_POS) | |
33 | ||
34 | #define CMD_START_FLAGS_CLK_30MHZ (0 << CMD_START_FLAGS_CLK_SRC_POS) | |
35 | #define CMD_START_FLAGS_CLK_48MHZ (1 << CMD_START_FLAGS_CLK_SRC_POS) | |
36 | ||
37 | #pragma pack(push, 1) | |
38 | ||
39 | struct version_info { | |
40 | uint8_t major; | |
41 | uint8_t minor; | |
42 | }; | |
43 | ||
44 | struct cmd_start_acquisition { | |
45 | uint8_t flags; | |
46 | uint8_t sample_delay_h; | |
47 | uint8_t sample_delay_l; | |
48 | }; | |
49 | ||
50 | #pragma pack(pop) | |
51 | ||
52 | static int command_get_fw_version(libusb_device_handle *devhdl, | |
53 | struct version_info *vi) | |
54 | { | |
55 | int ret; | |
56 | ||
57 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
58 | LIBUSB_ENDPOINT_IN, CMD_GET_FW_VERSION, 0x0000, 0x0000, | |
59 | (unsigned char *)vi, sizeof(struct version_info), 100); | |
60 | ||
61 | if (ret < 0) { | |
62 | sr_err("Unable to get version info: %s.", | |
63 | libusb_error_name(ret)); | |
64 | return SR_ERR; | |
65 | } | |
66 | ||
67 | return SR_OK; | |
68 | } | |
69 | ||
a54edb1d | 70 | static int command_get_revid_version(struct sr_dev_inst *sdi, uint8_t *revid) |
2f937611 | 71 | { |
a54edb1d ML |
72 | struct sr_usb_dev_inst *usb = sdi->conn; |
73 | libusb_device_handle *devhdl = usb->devhdl; | |
2f937611 UH |
74 | int ret; |
75 | ||
76 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
77 | LIBUSB_ENDPOINT_IN, CMD_GET_REVID_VERSION, 0x0000, 0x0000, | |
78 | revid, 1, 100); | |
79 | ||
80 | if (ret < 0) { | |
81 | sr_err("Unable to get REVID: %s.", libusb_error_name(ret)); | |
82 | return SR_ERR; | |
83 | } | |
84 | ||
85 | return SR_OK; | |
86 | } | |
87 | ||
a54edb1d | 88 | SR_PRIV int fx2lafw_command_start_acquisition(const struct sr_dev_inst *sdi) |
2f937611 | 89 | { |
81a34976 BV |
90 | struct dev_context *devc; |
91 | struct sr_usb_dev_inst *usb; | |
92 | uint64_t samplerate; | |
93 | struct cmd_start_acquisition cmd; | |
94 | int delay, ret; | |
95 | ||
96 | devc = sdi->priv; | |
97 | usb = sdi->conn; | |
98 | samplerate = devc->cur_samplerate; | |
2f937611 UH |
99 | |
100 | /* Compute the sample rate. */ | |
81a34976 | 101 | if (devc->sample_wide && samplerate > MAX_16BIT_SAMPLE_RATE) { |
2f937611 UH |
102 | sr_err("Unable to sample at %" PRIu64 "Hz " |
103 | "when collecting 16-bit samples.", samplerate); | |
104 | return SR_ERR; | |
105 | } | |
106 | ||
81a34976 BV |
107 | delay = 0; |
108 | cmd.flags = cmd.sample_delay_h = cmd.sample_delay_l = 0; | |
2f937611 UH |
109 | if ((SR_MHZ(48) % samplerate) == 0) { |
110 | cmd.flags = CMD_START_FLAGS_CLK_48MHZ; | |
111 | delay = SR_MHZ(48) / samplerate - 1; | |
112 | if (delay > MAX_SAMPLE_DELAY) | |
113 | delay = 0; | |
114 | } | |
115 | ||
116 | if (delay == 0 && (SR_MHZ(30) % samplerate) == 0) { | |
117 | cmd.flags = CMD_START_FLAGS_CLK_30MHZ; | |
118 | delay = SR_MHZ(30) / samplerate - 1; | |
119 | } | |
120 | ||
121 | sr_info("GPIF delay = %d, clocksource = %sMHz.", delay, | |
122 | (cmd.flags & CMD_START_FLAGS_CLK_48MHZ) ? "48" : "30"); | |
123 | ||
124 | if (delay <= 0 || delay > MAX_SAMPLE_DELAY) { | |
125 | sr_err("Unable to sample at %" PRIu64 "Hz.", samplerate); | |
126 | return SR_ERR; | |
127 | } | |
128 | ||
129 | cmd.sample_delay_h = (delay >> 8) & 0xff; | |
130 | cmd.sample_delay_l = delay & 0xff; | |
131 | ||
132 | /* Select the sampling width. */ | |
81a34976 | 133 | cmd.flags |= devc->sample_wide ? CMD_START_FLAGS_SAMPLE_16BIT : |
2f937611 UH |
134 | CMD_START_FLAGS_SAMPLE_8BIT; |
135 | ||
136 | /* Send the control message. */ | |
81a34976 | 137 | ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | |
2f937611 UH |
138 | LIBUSB_ENDPOINT_OUT, CMD_START, 0x0000, 0x0000, |
139 | (unsigned char *)&cmd, sizeof(cmd), 100); | |
140 | if (ret < 0) { | |
141 | sr_err("Unable to send start command: %s.", | |
142 | libusb_error_name(ret)); | |
143 | return SR_ERR; | |
144 | } | |
145 | ||
146 | return SR_OK; | |
147 | } | |
148 | ||
149 | /** | |
150 | * Check the USB configuration to determine if this is an fx2lafw device. | |
151 | * | |
152 | * @return TRUE if the device's configuration profile match fx2lafw | |
153 | * configuration, FALSE otherwise. | |
154 | */ | |
155 | SR_PRIV gboolean fx2lafw_check_conf_profile(libusb_device *dev) | |
156 | { | |
157 | struct libusb_device_descriptor des; | |
158 | struct libusb_device_handle *hdl; | |
159 | gboolean ret; | |
160 | unsigned char strdesc[64]; | |
161 | ||
162 | hdl = NULL; | |
163 | ret = FALSE; | |
164 | while (!ret) { | |
165 | /* Assume the FW has not been loaded, unless proven wrong. */ | |
166 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
167 | break; | |
168 | ||
169 | if (libusb_open(dev, &hdl) != 0) | |
170 | break; | |
171 | ||
172 | if (libusb_get_string_descriptor_ascii(hdl, | |
173 | des.iManufacturer, strdesc, sizeof(strdesc)) < 0) | |
174 | break; | |
175 | if (strncmp((const char *)strdesc, "sigrok", 6)) | |
176 | break; | |
177 | ||
178 | if (libusb_get_string_descriptor_ascii(hdl, | |
179 | des.iProduct, strdesc, sizeof(strdesc)) < 0) | |
180 | break; | |
181 | if (strncmp((const char *)strdesc, "fx2lafw", 7)) | |
182 | break; | |
183 | ||
184 | /* If we made it here, it must be an fx2lafw. */ | |
185 | ret = TRUE; | |
186 | } | |
187 | if (hdl) | |
188 | libusb_close(hdl); | |
189 | ||
190 | return ret; | |
191 | } | |
192 | ||
193 | SR_PRIV int fx2lafw_dev_open(struct sr_dev_inst *sdi, struct sr_dev_driver *di) | |
194 | { | |
195 | libusb_device **devlist; | |
196 | struct sr_usb_dev_inst *usb; | |
197 | struct libusb_device_descriptor des; | |
198 | struct dev_context *devc; | |
199 | struct drv_context *drvc; | |
200 | struct version_info vi; | |
5e2c86eb | 201 | int ret, i, device_count; |
2f937611 | 202 | uint8_t revid; |
5e2c86eb | 203 | char connection_id[64]; |
2f937611 UH |
204 | |
205 | drvc = di->priv; | |
206 | devc = sdi->priv; | |
207 | usb = sdi->conn; | |
208 | ||
209 | if (sdi->status == SR_ST_ACTIVE) | |
210 | /* Device is already in use. */ | |
211 | return SR_ERR; | |
212 | ||
2f937611 UH |
213 | device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); |
214 | if (device_count < 0) { | |
215 | sr_err("Failed to get device list: %s.", | |
216 | libusb_error_name(device_count)); | |
217 | return SR_ERR; | |
218 | } | |
219 | ||
220 | for (i = 0; i < device_count; i++) { | |
221 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
222 | sr_err("Failed to get device descriptor: %s.", | |
223 | libusb_error_name(ret)); | |
224 | continue; | |
225 | } | |
226 | ||
227 | if (des.idVendor != devc->profile->vid | |
228 | || des.idProduct != devc->profile->pid) | |
229 | continue; | |
230 | ||
5e2c86eb SA |
231 | if ((sdi->status == SR_ST_INITIALIZING) || |
232 | (sdi->status == SR_ST_INACTIVE)) { | |
2f937611 | 233 | /* |
5e2c86eb | 234 | * Check device by its physical USB bus/port address. |
2f937611 | 235 | */ |
5e2c86eb SA |
236 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); |
237 | if (strcmp(sdi->connection_id, connection_id)) | |
2f937611 UH |
238 | /* This is not the one. */ |
239 | continue; | |
240 | } | |
241 | ||
242 | if (!(ret = libusb_open(devlist[i], &usb->devhdl))) { | |
243 | if (usb->address == 0xff) | |
244 | /* | |
245 | * First time we touch this device after FW | |
246 | * upload, so we don't know the address yet. | |
247 | */ | |
248 | usb->address = libusb_get_device_address(devlist[i]); | |
249 | } else { | |
250 | sr_err("Failed to open device: %s.", | |
251 | libusb_error_name(ret)); | |
252 | break; | |
253 | } | |
254 | ||
255 | ret = command_get_fw_version(usb->devhdl, &vi); | |
256 | if (ret != SR_OK) { | |
257 | sr_err("Failed to get firmware version."); | |
258 | break; | |
259 | } | |
260 | ||
a54edb1d | 261 | ret = command_get_revid_version(sdi, &revid); |
2f937611 UH |
262 | if (ret != SR_OK) { |
263 | sr_err("Failed to get REVID."); | |
264 | break; | |
265 | } | |
266 | ||
267 | /* | |
268 | * Changes in major version mean incompatible/API changes, so | |
269 | * bail out if we encounter an incompatible version. | |
270 | * Different minor versions are OK, they should be compatible. | |
271 | */ | |
272 | if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) { | |
273 | sr_err("Expected firmware version %d.x, " | |
274 | "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR, | |
275 | vi.major, vi.minor); | |
276 | break; | |
277 | } | |
278 | ||
279 | sdi->status = SR_ST_ACTIVE; | |
5e2c86eb | 280 | sr_info("Opened device on %d.%d (logical) / %s (physical), " |
2f937611 | 281 | "interface %d, firmware %d.%d.", |
5e2c86eb | 282 | usb->bus, usb->address, connection_id, |
2f937611 UH |
283 | USB_INTERFACE, vi.major, vi.minor); |
284 | ||
285 | sr_info("Detected REVID=%d, it's a Cypress CY7C68013%s.", | |
286 | revid, (revid != 1) ? " (FX2)" : "A (FX2LP)"); | |
287 | ||
288 | break; | |
289 | } | |
290 | libusb_free_device_list(devlist, 1); | |
291 | ||
292 | if (sdi->status != SR_ST_ACTIVE) | |
293 | return SR_ERR; | |
294 | ||
295 | return SR_OK; | |
296 | } | |
297 | ||
2f937611 UH |
298 | SR_PRIV struct dev_context *fx2lafw_dev_new(void) |
299 | { | |
300 | struct dev_context *devc; | |
301 | ||
f57d8ffe | 302 | devc = g_malloc0(sizeof(struct dev_context)); |
2f937611 UH |
303 | devc->profile = NULL; |
304 | devc->fw_updated = 0; | |
305 | devc->cur_samplerate = 0; | |
306 | devc->limit_samples = 0; | |
7bfcb25c | 307 | devc->capture_ratio = 0; |
87b545fb | 308 | devc->sample_wide = FALSE; |
335122f0 | 309 | devc->stl = NULL; |
2f937611 UH |
310 | |
311 | return devc; | |
312 | } | |
313 | ||
314 | SR_PRIV void fx2lafw_abort_acquisition(struct dev_context *devc) | |
315 | { | |
316 | int i; | |
317 | ||
b0ccd64d | 318 | devc->acq_aborted = TRUE; |
2f937611 UH |
319 | |
320 | for (i = devc->num_transfers - 1; i >= 0; i--) { | |
321 | if (devc->transfers[i]) | |
322 | libusb_cancel_transfer(devc->transfers[i]); | |
323 | } | |
324 | } | |
325 | ||
102f1239 | 326 | static void finish_acquisition(struct sr_dev_inst *sdi) |
2f937611 UH |
327 | { |
328 | struct sr_datafeed_packet packet; | |
102f1239 BV |
329 | struct dev_context *devc; |
330 | ||
331 | devc = sdi->priv; | |
2f937611 UH |
332 | |
333 | /* Terminate session. */ | |
334 | packet.type = SR_DF_END; | |
102f1239 | 335 | sr_session_send(sdi, &packet); |
2f937611 UH |
336 | |
337 | /* Remove fds from polling. */ | |
102f1239 | 338 | usb_source_remove(sdi->session, devc->ctx); |
2f937611 UH |
339 | |
340 | devc->num_transfers = 0; | |
341 | g_free(devc->transfers); | |
335122f0 BV |
342 | |
343 | if (devc->stl) { | |
344 | soft_trigger_logic_free(devc->stl); | |
345 | devc->stl = NULL; | |
346 | } | |
2f937611 UH |
347 | } |
348 | ||
349 | static void free_transfer(struct libusb_transfer *transfer) | |
350 | { | |
9615eeb5 | 351 | struct sr_dev_inst *sdi; |
2f937611 UH |
352 | struct dev_context *devc; |
353 | unsigned int i; | |
354 | ||
9615eeb5 BV |
355 | sdi = transfer->user_data; |
356 | devc = sdi->priv; | |
2f937611 UH |
357 | |
358 | g_free(transfer->buffer); | |
359 | transfer->buffer = NULL; | |
360 | libusb_free_transfer(transfer); | |
361 | ||
362 | for (i = 0; i < devc->num_transfers; i++) { | |
363 | if (devc->transfers[i] == transfer) { | |
364 | devc->transfers[i] = NULL; | |
365 | break; | |
366 | } | |
367 | } | |
368 | ||
369 | devc->submitted_transfers--; | |
370 | if (devc->submitted_transfers == 0) | |
102f1239 | 371 | finish_acquisition(sdi); |
2f937611 UH |
372 | } |
373 | ||
374 | static void resubmit_transfer(struct libusb_transfer *transfer) | |
375 | { | |
376 | int ret; | |
377 | ||
378 | if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS) | |
379 | return; | |
380 | ||
9615eeb5 | 381 | sr_err("%s: %s", __func__, libusb_error_name(ret)); |
2f937611 | 382 | free_transfer(transfer); |
2f937611 | 383 | |
9615eeb5 BV |
384 | } |
385 | ||
2f937611 UH |
386 | SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer) |
387 | { | |
9615eeb5 BV |
388 | struct sr_dev_inst *sdi; |
389 | struct dev_context *devc; | |
2f937611 UH |
390 | gboolean packet_has_error = FALSE; |
391 | struct sr_datafeed_packet packet; | |
392 | struct sr_datafeed_logic logic; | |
9615eeb5 BV |
393 | unsigned int num_samples; |
394 | int trigger_offset, cur_sample_count, unitsize; | |
7bfcb25c | 395 | int pre_trigger_samples; |
2f937611 | 396 | |
9615eeb5 BV |
397 | sdi = transfer->user_data; |
398 | devc = sdi->priv; | |
2f937611 UH |
399 | |
400 | /* | |
401 | * If acquisition has already ended, just free any queued up | |
402 | * transfer that come in. | |
403 | */ | |
b0ccd64d | 404 | if (devc->acq_aborted) { |
2f937611 UH |
405 | free_transfer(transfer); |
406 | return; | |
407 | } | |
408 | ||
409 | sr_info("receive_transfer(): status %d received %d bytes.", | |
410 | transfer->status, transfer->actual_length); | |
411 | ||
412 | /* Save incoming transfer before reusing the transfer struct. */ | |
9615eeb5 BV |
413 | unitsize = devc->sample_wide ? 2 : 1; |
414 | cur_sample_count = transfer->actual_length / unitsize; | |
2f937611 UH |
415 | |
416 | switch (transfer->status) { | |
417 | case LIBUSB_TRANSFER_NO_DEVICE: | |
418 | fx2lafw_abort_acquisition(devc); | |
419 | free_transfer(transfer); | |
420 | return; | |
421 | case LIBUSB_TRANSFER_COMPLETED: | |
422 | case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */ | |
423 | break; | |
424 | default: | |
425 | packet_has_error = TRUE; | |
426 | break; | |
427 | } | |
428 | ||
429 | if (transfer->actual_length == 0 || packet_has_error) { | |
430 | devc->empty_transfer_count++; | |
431 | if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
432 | /* | |
433 | * The FX2 gave up. End the acquisition, the frontend | |
434 | * will work out that the samplecount is short. | |
435 | */ | |
436 | fx2lafw_abort_acquisition(devc); | |
437 | free_transfer(transfer); | |
438 | } else { | |
439 | resubmit_transfer(transfer); | |
440 | } | |
441 | return; | |
442 | } else { | |
443 | devc->empty_transfer_count = 0; | |
444 | } | |
445 | ||
9615eeb5 | 446 | if (devc->trigger_fired) { |
2f663c82 | 447 | if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) { |
9615eeb5 BV |
448 | /* Send the incoming transfer to the session bus. */ |
449 | packet.type = SR_DF_LOGIC; | |
450 | packet.payload = &logic; | |
2f663c82 | 451 | if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples) |
9615eeb5 BV |
452 | num_samples = devc->limit_samples - devc->sent_samples; |
453 | else | |
454 | num_samples = cur_sample_count; | |
455 | logic.length = num_samples * unitsize; | |
456 | logic.unitsize = unitsize; | |
457 | logic.data = transfer->buffer; | |
458 | sr_session_send(devc->cb_data, &packet); | |
649e9e16 | 459 | devc->sent_samples += num_samples; |
9615eeb5 BV |
460 | } |
461 | } else { | |
335122f0 | 462 | trigger_offset = soft_trigger_logic_check(devc->stl, |
7bfcb25c | 463 | transfer->buffer, transfer->actual_length, &pre_trigger_samples); |
9615eeb5 | 464 | if (trigger_offset > -1) { |
7bfcb25c | 465 | devc->sent_samples += pre_trigger_samples; |
9615eeb5 BV |
466 | packet.type = SR_DF_LOGIC; |
467 | packet.payload = &logic; | |
468 | num_samples = cur_sample_count - trigger_offset; | |
469 | if (devc->limit_samples && | |
470 | num_samples > devc->limit_samples - devc->sent_samples) | |
471 | num_samples = devc->limit_samples - devc->sent_samples; | |
472 | logic.length = num_samples * unitsize; | |
473 | logic.unitsize = unitsize; | |
474 | logic.data = transfer->buffer + trigger_offset * unitsize; | |
475 | sr_session_send(devc->cb_data, &packet); | |
476 | devc->sent_samples += num_samples; | |
477 | ||
478 | devc->trigger_fired = TRUE; | |
2f937611 | 479 | } |
06b5d7f7 BV |
480 | } |
481 | ||
482 | if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) { | |
483 | fx2lafw_abort_acquisition(devc); | |
484 | free_transfer(transfer); | |
9615eeb5 BV |
485 | } else |
486 | resubmit_transfer(transfer); | |
2f937611 UH |
487 | } |
488 | ||
489 | static unsigned int to_bytes_per_ms(unsigned int samplerate) | |
490 | { | |
491 | return samplerate / 1000; | |
492 | } | |
493 | ||
494 | SR_PRIV size_t fx2lafw_get_buffer_size(struct dev_context *devc) | |
495 | { | |
496 | size_t s; | |
497 | ||
498 | /* | |
499 | * The buffer should be large enough to hold 10ms of data and | |
500 | * a multiple of 512. | |
501 | */ | |
502 | s = 10 * to_bytes_per_ms(devc->cur_samplerate); | |
503 | return (s + 511) & ~511; | |
504 | } | |
505 | ||
506 | SR_PRIV unsigned int fx2lafw_get_number_of_transfers(struct dev_context *devc) | |
507 | { | |
508 | unsigned int n; | |
509 | ||
510 | /* Total buffer size should be able to hold about 500ms of data. */ | |
511 | n = (500 * to_bytes_per_ms(devc->cur_samplerate) / | |
512 | fx2lafw_get_buffer_size(devc)); | |
513 | ||
514 | if (n > NUM_SIMUL_TRANSFERS) | |
515 | return NUM_SIMUL_TRANSFERS; | |
516 | ||
517 | return n; | |
518 | } | |
519 | ||
520 | SR_PRIV unsigned int fx2lafw_get_timeout(struct dev_context *devc) | |
521 | { | |
522 | size_t total_size; | |
523 | unsigned int timeout; | |
524 | ||
525 | total_size = fx2lafw_get_buffer_size(devc) * | |
526 | fx2lafw_get_number_of_transfers(devc); | |
527 | timeout = total_size / to_bytes_per_ms(devc->cur_samplerate); | |
528 | return timeout + timeout / 4; /* Leave a headroom of 25% percent. */ | |
529 | } |