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f4314d7e UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 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> | |
ecaf59db | 22 | #include <glib.h> |
4362438f | 23 | #include <string.h> |
f4314d7e | 24 | #include <sigrok.h> |
b08024a8 | 25 | #include <sigrok-internal.h> |
f4314d7e UH |
26 | |
27 | #define USB_VENDOR_ID 0x0403 | |
28 | #define USB_PRODUCT_ID 0x6001 | |
29 | #define USB_DESCRIPTION "ChronoVu LA8" | |
30 | #define USB_VENDOR_NAME "ChronoVu" | |
31 | #define USB_MODEL_NAME "LA8" | |
32 | #define USB_MODEL_VERSION "" | |
33 | ||
34 | #define NUM_PROBES 8 | |
35 | #define TRIGGER_TYPES "01" | |
36 | #define SDRAM_SIZE (8 * 1024 * 1024) | |
37 | #define MIN_NUM_SAMPLES 1 | |
38 | ||
39 | static GSList *device_instances = NULL; | |
40 | ||
41 | struct la8 { | |
42 | /** FTDI device context (used by libftdi). */ | |
43 | struct ftdi_context *ftdic; | |
44 | ||
45 | /** The currently configured samplerate of the device. */ | |
46 | uint64_t cur_samplerate; | |
47 | ||
48 | /** The current sampling limit (in ms). */ | |
49 | uint64_t limit_msec; | |
50 | ||
51 | /** The current sampling limit (in number of samples). */ | |
52 | uint64_t limit_samples; | |
53 | ||
f4314d7e UH |
54 | /** TODO */ |
55 | gpointer session_id; | |
56 | ||
57 | /** | |
4362438f | 58 | * An 4KB buffer containing some (mangled) samples from the device. |
f4314d7e UH |
59 | * Format: Pretty mangled-up (due to hardware reasons), see code. |
60 | */ | |
4362438f | 61 | uint8_t mangled_buf[4096]; |
f4314d7e UH |
62 | |
63 | /** | |
64 | * An 8MB buffer where we'll store the de-mangled samples. | |
65 | * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0. | |
66 | */ | |
67 | uint8_t *final_buf; | |
68 | ||
69 | /** | |
70 | * Trigger pattern (MSB = channel 7, LSB = channel 0). | |
71 | * A 1 bit matches a high signal, 0 matches a low signal on a probe. | |
72 | * Only low/high triggers (but not e.g. rising/falling) are supported. | |
73 | */ | |
74 | uint8_t trigger_pattern; | |
75 | ||
76 | /** | |
77 | * Trigger mask (MSB = channel 7, LSB = channel 0). | |
78 | * A 1 bit means "must match trigger_pattern", 0 means "don't care". | |
79 | */ | |
80 | uint8_t trigger_mask; | |
81 | ||
82 | /** Time (in seconds) before the trigger times out. */ | |
83 | uint64_t trigger_timeout; | |
84 | ||
4d7b525a UH |
85 | /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ |
86 | int trigger_found; | |
87 | ||
f4314d7e UH |
88 | /** TODO */ |
89 | time_t done; | |
90 | ||
91 | /** Counter/index for the data block (0..2047) to be read. */ | |
92 | int block_counter; | |
93 | ||
94 | /** The divcount value (determines the sample period) for the LA8. */ | |
95 | uint8_t divcount; | |
96 | }; | |
97 | ||
98 | /* This will be initialized via hw_get_device_info()/SR_DI_SAMPLERATES. */ | |
99 | static uint64_t supported_samplerates[255 + 1] = { 0 }; | |
100 | ||
101 | /* | |
102 | * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz | |
103 | * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz | |
104 | */ | |
105 | static struct sr_samplerates samplerates = { | |
106 | .low = 0, | |
107 | .high = 0, | |
108 | .step = 0, | |
109 | .list = supported_samplerates, | |
110 | }; | |
111 | ||
112 | /* Note: Continuous sampling is not supported by the hardware. */ | |
113 | static int capabilities[] = { | |
114 | SR_HWCAP_LOGIC_ANALYZER, | |
115 | SR_HWCAP_SAMPLERATE, | |
116 | SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */ | |
117 | SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */ | |
118 | 0, | |
119 | }; | |
120 | ||
121 | /* Function prototypes. */ | |
122 | static int la8_close_usb_reset_sequencer(struct la8 *la8); | |
123 | static void hw_stop_acquisition(int device_index, gpointer session_device_id); | |
124 | static int la8_reset(struct la8 *la8); | |
125 | ||
126 | static void fill_supported_samplerates_if_needed(void) | |
127 | { | |
128 | int i; | |
129 | ||
130 | /* Do nothing if supported_samplerates[] is already filled. */ | |
131 | if (supported_samplerates[0] != 0) | |
132 | return; | |
133 | ||
134 | /* Fill supported_samplerates[] with the proper values. */ | |
135 | for (i = 0; i < 255; i++) | |
136 | supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1); | |
137 | supported_samplerates[255] = 0; | |
138 | } | |
139 | ||
140 | /** | |
141 | * Check if the given samplerate is supported by the LA8 hardware. | |
142 | * | |
143 | * @param samplerate The samplerate (in Hz) to check. | |
144 | * @return 1 if the samplerate is supported/valid, 0 otherwise. | |
145 | */ | |
146 | static int is_valid_samplerate(uint64_t samplerate) | |
147 | { | |
148 | int i; | |
149 | ||
150 | fill_supported_samplerates_if_needed(); | |
151 | ||
152 | for (i = 0; i < 255; i++) { | |
153 | if (supported_samplerates[i] == samplerate) | |
154 | return 1; | |
155 | } | |
156 | ||
b08024a8 UH |
157 | sr_warn("la8: %s: invalid samplerate (%" PRIu64 "Hz)", |
158 | __func__, samplerate); | |
f4314d7e UH |
159 | |
160 | return 0; | |
161 | } | |
162 | ||
163 | /** | |
164 | * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants. | |
165 | * | |
166 | * LA8 hardware: sample period = (divcount + 1) * 10ns. | |
167 | * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). | |
168 | * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate). | |
169 | * | |
170 | * @param samplerate The samplerate in Hz. | |
171 | * @return The divcount value as needed by the hardware, or 0xff upon errors. | |
172 | */ | |
173 | static uint8_t samplerate_to_divcount(uint64_t samplerate) | |
174 | { | |
175 | if (samplerate == 0) { | |
30939770 | 176 | sr_err("la8: %s: samplerate was 0", __func__); |
f4314d7e UH |
177 | return 0xff; |
178 | } | |
179 | ||
180 | if (!is_valid_samplerate(samplerate)) { | |
30939770 UH |
181 | sr_err("la8: %s: can't get divcount, samplerate invalid", |
182 | __func__); | |
f4314d7e UH |
183 | return 0xff; |
184 | } | |
185 | ||
186 | return (SR_MHZ(100) / samplerate) - 1; | |
187 | } | |
188 | ||
189 | /** | |
190 | * Write data of a certain length to the LA8's FTDI device. | |
191 | * | |
192 | * @param la8 The LA8 struct containing private per-device-instance data. | |
193 | * @param buf The buffer containing the data to write. | |
194 | * @param size The number of bytes to write. | |
195 | * @return The number of bytes written, or a negative value upon errors. | |
196 | */ | |
197 | static int la8_write(struct la8 *la8, uint8_t *buf, int size) | |
198 | { | |
199 | int bytes_written; | |
200 | ||
201 | if (!la8) { | |
30939770 | 202 | sr_err("la8: %s: la8 was NULL", __func__); |
8703f512 | 203 | return SR_ERR_ARG; |
f4314d7e UH |
204 | } |
205 | ||
206 | if (!la8->ftdic) { | |
30939770 | 207 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 208 | return SR_ERR_ARG; |
f4314d7e UH |
209 | } |
210 | ||
211 | if (!buf) { | |
30939770 | 212 | sr_err("la8: %s: buf was NULL", __func__); |
8703f512 | 213 | return SR_ERR_ARG; |
f4314d7e UH |
214 | } |
215 | ||
216 | if (size < 0) { | |
30939770 | 217 | sr_err("la8: %s: size was < 0", __func__); |
8703f512 | 218 | return SR_ERR_ARG; |
f4314d7e UH |
219 | } |
220 | ||
221 | bytes_written = ftdi_write_data(la8->ftdic, buf, size); | |
222 | ||
223 | if (bytes_written < 0) { | |
b08024a8 UH |
224 | sr_warn("la8: %s: ftdi_write_data: (%d) %s", __func__, |
225 | bytes_written, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e UH |
226 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
227 | } else if (bytes_written != size) { | |
b08024a8 UH |
228 | sr_warn("la8: %s: bytes to write: %d, bytes written: %d", |
229 | __func__, size, bytes_written); | |
f4314d7e UH |
230 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
231 | } | |
232 | ||
233 | return bytes_written; | |
234 | } | |
235 | ||
236 | /** | |
237 | * Read a certain amount of bytes from the LA8's FTDI device. | |
238 | * | |
239 | * @param la8 The LA8 struct containing private per-device-instance data. | |
240 | * @param buf The buffer where the received data will be stored. | |
241 | * @param size The number of bytes to read. | |
242 | * @return The number of bytes read, or a negative value upon errors. | |
243 | */ | |
244 | static int la8_read(struct la8 *la8, uint8_t *buf, int size) | |
245 | { | |
246 | int bytes_read; | |
247 | ||
248 | if (!la8) { | |
30939770 | 249 | sr_err("la8: %s: la8 was NULL", __func__); |
8703f512 | 250 | return SR_ERR_ARG; |
f4314d7e UH |
251 | } |
252 | ||
253 | if (!la8->ftdic) { | |
30939770 | 254 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 255 | return SR_ERR_ARG; |
f4314d7e UH |
256 | } |
257 | ||
258 | if (!buf) { | |
30939770 | 259 | sr_err("la8: %s: buf was NULL", __func__); |
8703f512 | 260 | return SR_ERR_ARG; |
f4314d7e UH |
261 | } |
262 | ||
263 | if (size <= 0) { | |
30939770 | 264 | sr_err("la8: %s: size was <= 0", __func__); |
8703f512 | 265 | return SR_ERR_ARG; |
f4314d7e UH |
266 | } |
267 | ||
268 | bytes_read = ftdi_read_data(la8->ftdic, buf, size); | |
269 | ||
270 | if (bytes_read < 0) { | |
b08024a8 UH |
271 | sr_warn("la8: %s: ftdi_read_data: (%d) %s", __func__, |
272 | bytes_read, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e | 273 | } else if (bytes_read != size) { |
b08024a8 UH |
274 | // sr_warn("la8: %s: bytes to read: %d, bytes read: %d", |
275 | // __func__, size, bytes_read); | |
f4314d7e UH |
276 | } |
277 | ||
278 | return bytes_read; | |
279 | } | |
280 | ||
281 | static int la8_close(struct la8 *la8) | |
282 | { | |
283 | int ret; | |
284 | ||
285 | if (!la8) { | |
30939770 | 286 | sr_err("la8: %s: la8 was NULL", __func__); |
8703f512 | 287 | return SR_ERR_ARG; |
f4314d7e UH |
288 | } |
289 | ||
290 | if (!la8->ftdic) { | |
30939770 | 291 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 292 | return SR_ERR_ARG; |
f4314d7e UH |
293 | } |
294 | ||
295 | if ((ret = ftdi_usb_close(la8->ftdic)) < 0) { | |
b08024a8 UH |
296 | sr_warn("la8: %s: ftdi_usb_close: (%d) %s", |
297 | __func__, ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e UH |
298 | } |
299 | ||
300 | return ret; | |
301 | } | |
302 | ||
303 | /** | |
304 | * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic. | |
305 | * | |
306 | * @param la8 The LA8 struct containing private per-device-instance data. | |
307 | * @return SR_OK upon success, SR_ERR upon failure. | |
308 | */ | |
309 | static int la8_close_usb_reset_sequencer(struct la8 *la8) | |
310 | { | |
311 | /* Magic sequence of bytes for resetting the LA8 sequencer logic. */ | |
312 | uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}; | |
313 | int ret; | |
314 | ||
b08024a8 | 315 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
316 | |
317 | if (!la8) { | |
30939770 | 318 | sr_err("la8: %s: la8 was NULL", __func__); |
8703f512 | 319 | return SR_ERR_ARG; |
f4314d7e UH |
320 | } |
321 | ||
322 | if (!la8->ftdic) { | |
30939770 | 323 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 324 | return SR_ERR_ARG; |
f4314d7e UH |
325 | } |
326 | ||
327 | if (la8->ftdic->usb_dev) { | |
328 | /* Reset the LA8 sequencer logic, then wait 100ms. */ | |
b08024a8 | 329 | sr_dbg("la8: resetting sequencer logic"); |
f4314d7e UH |
330 | (void) la8_write(la8, buf, 8); /* Ignore errors. */ |
331 | g_usleep(100 * 1000); | |
332 | ||
333 | /* Purge FTDI buffers, then reset and close the FTDI device. */ | |
b08024a8 | 334 | sr_dbg("la8: purging buffers, resetting+closing FTDI device"); |
f4314d7e UH |
335 | |
336 | /* Log errors, but ignore them (i.e., don't abort). */ | |
337 | if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0) | |
b08024a8 | 338 | sr_warn("la8: %s: ftdi_usb_purge_buffers: (%d) %s", |
f4314d7e UH |
339 | __func__, ret, ftdi_get_error_string(la8->ftdic)); |
340 | if ((ret = ftdi_usb_reset(la8->ftdic)) < 0) | |
b08024a8 UH |
341 | sr_warn("la8: %s: ftdi_usb_reset: (%d) %s", __func__, |
342 | ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e | 343 | if ((ret = ftdi_usb_close(la8->ftdic)) < 0) |
b08024a8 UH |
344 | sr_warn("la8: %s: ftdi_usb_close: (%d) %s", __func__, |
345 | ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e | 346 | } else { |
b08024a8 | 347 | sr_dbg("la8: %s: usb_dev was NULL, nothing to do", __func__); |
f4314d7e UH |
348 | } |
349 | ||
350 | ftdi_free(la8->ftdic); /* Returns void. */ | |
351 | la8->ftdic = NULL; | |
352 | ||
353 | return SR_OK; | |
354 | } | |
355 | ||
356 | /** | |
357 | * Reset the ChronoVu LA8. | |
358 | * | |
359 | * The LA8 must be reset after a failed read/write operation or upon timeouts. | |
360 | * | |
361 | * @param la8 The LA8 struct containing private per-device-instance data. | |
362 | * @return SR_OK upon success, SR_ERR upon failure. | |
363 | */ | |
364 | static int la8_reset(struct la8 *la8) | |
365 | { | |
366 | uint8_t buf[4096]; | |
367 | time_t done, now; | |
368 | int bytes_read; | |
369 | ||
370 | if (!la8) { | |
30939770 | 371 | sr_err("la8: %s: la8 was NULL", __func__); |
8703f512 | 372 | return SR_ERR_ARG; |
f4314d7e UH |
373 | } |
374 | ||
375 | if (!la8->ftdic) { | |
30939770 | 376 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 377 | return SR_ERR_ARG; |
f4314d7e UH |
378 | } |
379 | ||
b08024a8 | 380 | sr_dbg("la8: resetting the device"); |
f4314d7e UH |
381 | |
382 | /* | |
383 | * Purge pending read data from the FTDI hardware FIFO until | |
384 | * no more data is left, or a timeout occurs (after 20s). | |
385 | */ | |
386 | done = 20 + time(NULL); | |
387 | do { | |
388 | /* TODO: Ignore errors? Check for < 0 at least! */ | |
389 | bytes_read = la8_read(la8, (uint8_t *)&buf, 4096); | |
390 | now = time(NULL); | |
391 | } while ((done > now) && (bytes_read > 0)); | |
392 | ||
393 | /* Reset the LA8 sequencer logic and close the USB port. */ | |
394 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ | |
395 | ||
b08024a8 | 396 | sr_dbg("la8: device reset finished"); |
f4314d7e UH |
397 | |
398 | return SR_OK; | |
399 | } | |
400 | ||
ecaf59db UH |
401 | static int configure_probes(struct la8 *la8, GSList *probes) |
402 | { | |
403 | struct sr_probe *probe; | |
404 | GSList *l; | |
405 | uint8_t probe_bit; | |
406 | char *tc; | |
407 | ||
408 | la8->trigger_pattern = 0; | |
409 | la8->trigger_mask = 0; /* Default to "don't care" for all probes. */ | |
410 | ||
411 | for (l = probes; l; l = l->next) { | |
412 | probe = (struct sr_probe *)l->data; | |
413 | ||
414 | if (!probe) { | |
415 | sr_err("la8: %s: probe was NULL", __func__); | |
416 | return SR_ERR; | |
417 | } | |
418 | ||
419 | /* Skip disabled probes. */ | |
420 | if (!probe->enabled) | |
421 | continue; | |
422 | ||
423 | /* Skip (enabled) probes with no configured trigger. */ | |
424 | if (!probe->trigger) | |
425 | continue; | |
426 | ||
427 | /* Note: Must only be run if probe->trigger != NULL. */ | |
428 | if (probe->index < 0 || probe->index > 7) { | |
429 | sr_err("la8: %s: invalid probe index %d, must be " | |
430 | "between 0 and 7", __func__, probe->index); | |
431 | return SR_ERR; | |
432 | } | |
433 | ||
434 | probe_bit = (1 << (probe->index - 1)); | |
435 | ||
436 | /* Configure the probe's trigger mask and trigger pattern. */ | |
437 | for (tc = probe->trigger; tc && *tc; tc++) { | |
438 | la8->trigger_mask |= probe_bit; | |
439 | ||
440 | /* Sanity check, LA8 only supports low/high trigger. */ | |
441 | if (*tc != '0' && *tc != '1') { | |
442 | sr_err("la8: %s: invalid trigger '%c', only " | |
443 | "'0'/'1' supported", __func__, *tc); | |
444 | return SR_ERR; | |
445 | } | |
446 | ||
447 | if (*tc == '1') | |
448 | la8->trigger_pattern |= probe_bit; | |
449 | } | |
450 | } | |
451 | ||
452 | sr_dbg("la8: %s: trigger_mask = 0x%x, trigger_pattern = 0x%x", | |
453 | __func__, la8->trigger_mask, la8->trigger_pattern); | |
454 | ||
455 | return SR_OK; | |
456 | } | |
457 | ||
f4314d7e UH |
458 | static int hw_init(const char *deviceinfo) |
459 | { | |
460 | int ret; | |
461 | struct sr_device_instance *sdi; | |
462 | struct la8 *la8; | |
463 | ||
b08024a8 | 464 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
465 | |
466 | /* Avoid compiler errors. */ | |
467 | deviceinfo = deviceinfo; | |
468 | ||
469 | /* Allocate memory for our private driver context. */ | |
2e82a17b | 470 | if (!(la8 = g_try_malloc(sizeof(struct la8)))) { |
30939770 | 471 | sr_err("la8: %s: struct la8 malloc failed", __func__); |
f4314d7e UH |
472 | ret = SR_ERR_MALLOC; |
473 | goto err_free_nothing; | |
474 | } | |
475 | ||
476 | /* Set some sane defaults. */ | |
477 | la8->ftdic = NULL; | |
478 | la8->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */ | |
479 | la8->limit_msec = 0; | |
480 | la8->limit_samples = 0; | |
f4314d7e | 481 | la8->session_id = NULL; |
4362438f | 482 | memset(la8->mangled_buf, 0, 4096); |
f4314d7e UH |
483 | la8->final_buf = NULL; |
484 | la8->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */ | |
485 | la8->trigger_mask = 0x00; /* All probes are "don't care". */ | |
486 | la8->trigger_timeout = 10; /* Default to 10s trigger timeout. */ | |
4d7b525a | 487 | la8->trigger_found = 0; |
f4314d7e UH |
488 | la8->done = 0; |
489 | la8->block_counter = 0; | |
490 | la8->divcount = 0; /* 10ns sample period == 100MHz samplerate */ | |
491 | ||
f4314d7e | 492 | /* Allocate memory where we'll store the de-mangled data. */ |
2e82a17b | 493 | if (!(la8->final_buf = g_try_malloc(SDRAM_SIZE))) { |
30939770 | 494 | sr_err("la8: %s: final_buf malloc failed", __func__); |
f4314d7e | 495 | ret = SR_ERR_MALLOC; |
4362438f | 496 | goto err_free_la8; |
f4314d7e UH |
497 | } |
498 | ||
499 | /* Allocate memory for the FTDI context (ftdic) and initialize it. */ | |
500 | if (!(la8->ftdic = ftdi_new())) { | |
30939770 | 501 | sr_err("la8: %s: ftdi_new failed", __func__); |
f4314d7e UH |
502 | ret = SR_ERR; /* TODO: More specific error? */ |
503 | goto err_free_final_buf; | |
504 | } | |
505 | ||
506 | /* Check for the device and temporarily open it. */ | |
507 | if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID, | |
508 | USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) { | |
30939770 UH |
509 | sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s", |
510 | __func__, ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e UH |
511 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
512 | ret = SR_ERR; /* TODO: More specific error? */ | |
513 | goto err_free_ftdic; | |
514 | } | |
b08024a8 | 515 | sr_dbg("la8: found device"); |
f4314d7e UH |
516 | |
517 | /* Register the device with libsigrok. */ | |
518 | sdi = sr_device_instance_new(0, SR_ST_INITIALIZING, | |
519 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
520 | if (!sdi) { | |
30939770 | 521 | sr_err("la8: %s: sr_device_instance_new failed", __func__); |
f4314d7e UH |
522 | ret = SR_ERR; /* TODO: More specific error? */ |
523 | goto err_close_ftdic; | |
524 | } | |
525 | ||
526 | sdi->priv = la8; | |
527 | ||
528 | device_instances = g_slist_append(device_instances, sdi); | |
529 | ||
b08024a8 | 530 | sr_dbg("la8: %s finished successfully", __func__); |
f4314d7e UH |
531 | |
532 | /* Close device. We'll reopen it again when we need it. */ | |
533 | (void) la8_close(la8); /* Log, but ignore errors. */ | |
534 | ||
535 | // return SR_OK; /* TODO */ | |
536 | return 1; | |
537 | ||
538 | err_close_ftdic: | |
539 | (void) la8_close(la8); /* Log, but ignore errors. */ | |
540 | err_free_ftdic: | |
2e82a17b | 541 | free(la8->ftdic); /* NOT g_free()! */ |
f4314d7e | 542 | err_free_final_buf: |
2e82a17b | 543 | g_free(la8->final_buf); |
f4314d7e | 544 | err_free_la8: |
2e82a17b | 545 | g_free(la8); |
f4314d7e UH |
546 | err_free_nothing: |
547 | // return ret; /* TODO */ | |
548 | return 0; | |
549 | } | |
550 | ||
551 | static int hw_opendev(int device_index) | |
552 | { | |
553 | int ret; | |
554 | struct sr_device_instance *sdi; | |
555 | struct la8 *la8; | |
556 | ||
557 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
30939770 | 558 | sr_err("la8: %s: sdi was NULL", __func__); |
8703f512 | 559 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
560 | } |
561 | ||
562 | if (!(la8 = sdi->priv)) { | |
30939770 | 563 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
8703f512 | 564 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
565 | } |
566 | ||
b08024a8 | 567 | sr_dbg("la8: opening device"); |
f4314d7e UH |
568 | |
569 | /* Open the device. */ | |
570 | if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID, | |
571 | USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) { | |
30939770 UH |
572 | sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s", |
573 | __func__, ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e UH |
574 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
575 | return SR_ERR; | |
576 | } | |
b08024a8 | 577 | sr_dbg("la8: device opened successfully"); |
f4314d7e UH |
578 | |
579 | /* Purge RX/TX buffers in the FTDI chip. */ | |
580 | if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0) { | |
30939770 UH |
581 | sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s", |
582 | __func__, ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e UH |
583 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
584 | goto err_opendev_close_ftdic; | |
585 | } | |
b08024a8 | 586 | sr_dbg("la8: FTDI buffers purged successfully"); |
f4314d7e UH |
587 | |
588 | /* Enable flow control in the FTDI chip. */ | |
589 | if ((ret = ftdi_setflowctrl(la8->ftdic, SIO_RTS_CTS_HS)) < 0) { | |
30939770 UH |
590 | sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s", |
591 | __func__, ret, ftdi_get_error_string(la8->ftdic)); | |
f4314d7e UH |
592 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
593 | goto err_opendev_close_ftdic; | |
594 | } | |
b08024a8 | 595 | sr_dbg("la8: FTDI flow control enabled successfully"); |
f4314d7e UH |
596 | |
597 | /* Wait 100ms. */ | |
598 | g_usleep(100 * 1000); | |
599 | ||
600 | sdi->status = SR_ST_ACTIVE; | |
601 | ||
602 | return SR_OK; | |
603 | ||
604 | err_opendev_close_ftdic: | |
605 | (void) la8_close(la8); /* Log, but ignore errors. */ | |
606 | return SR_ERR; | |
607 | } | |
608 | ||
609 | static int set_samplerate(struct sr_device_instance *sdi, uint64_t samplerate) | |
610 | { | |
611 | struct la8 *la8; | |
612 | ||
613 | if (!sdi) { | |
30939770 | 614 | sr_err("la8: %s: sdi was NULL", __func__); |
8703f512 | 615 | return SR_ERR_ARG; |
f4314d7e UH |
616 | } |
617 | ||
618 | if (!(la8 = sdi->priv)) { | |
30939770 | 619 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
8703f512 | 620 | return SR_ERR_ARG; |
f4314d7e UH |
621 | } |
622 | ||
b08024a8 | 623 | sr_dbg("la8: setting samplerate"); |
f4314d7e UH |
624 | |
625 | fill_supported_samplerates_if_needed(); | |
626 | ||
627 | /* Check if this is a samplerate supported by the hardware. */ | |
628 | if (!is_valid_samplerate(samplerate)) | |
629 | return SR_ERR; | |
630 | ||
631 | /* Set the new samplerate. */ | |
632 | la8->cur_samplerate = samplerate; | |
633 | ||
b08024a8 | 634 | sr_dbg("la8: samplerate set to %" PRIu64 "Hz", la8->cur_samplerate); |
f4314d7e UH |
635 | |
636 | return SR_OK; | |
637 | } | |
638 | ||
697785d1 | 639 | static int hw_closedev(int device_index) |
f4314d7e UH |
640 | { |
641 | struct sr_device_instance *sdi; | |
642 | struct la8 *la8; | |
643 | ||
644 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
30939770 | 645 | sr_err("la8: %s: sdi was NULL", __func__); |
697785d1 | 646 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
647 | } |
648 | ||
649 | if (!(la8 = sdi->priv)) { | |
30939770 | 650 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
697785d1 | 651 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
652 | } |
653 | ||
b08024a8 | 654 | sr_dbg("la8: closing device"); |
f4314d7e UH |
655 | |
656 | if (sdi->status == SR_ST_ACTIVE) { | |
b08024a8 | 657 | sr_dbg("la8: %s: status ACTIVE, closing device", __func__); |
697785d1 | 658 | /* TODO: Really ignore errors here, or return SR_ERR? */ |
f4314d7e UH |
659 | (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ |
660 | } else { | |
b08024a8 | 661 | sr_dbg("la8: %s: status not ACTIVE, nothing to do", __func__); |
f4314d7e UH |
662 | } |
663 | ||
664 | sdi->status = SR_ST_INACTIVE; | |
2f5c8c96 UH |
665 | |
666 | sr_dbg("la8: %s: freeing sample buffers", __func__); | |
d3b1b51c | 667 | g_free(la8->final_buf); |
697785d1 UH |
668 | |
669 | return SR_OK; | |
f4314d7e UH |
670 | } |
671 | ||
672 | static void hw_cleanup(void) | |
673 | { | |
674 | GSList *l; | |
675 | struct sr_device_instance *sdi; | |
676 | ||
b08024a8 | 677 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
678 | |
679 | /* Properly close all devices. */ | |
680 | for (l = device_instances; l; l = l->next) { | |
681 | if ((sdi = l->data) == NULL) { | |
30939770 | 682 | sr_warn("la8: %s: sdi was NULL, continuing", __func__); |
f4314d7e UH |
683 | continue; |
684 | } | |
685 | if (sdi->priv != NULL) | |
686 | free(sdi->priv); | |
687 | else | |
30939770 UH |
688 | sr_warn("la8: %s: sdi->priv was NULL, nothing " |
689 | "to do", __func__); | |
f4314d7e UH |
690 | sr_device_instance_free(sdi); /* Returns void. */ |
691 | } | |
692 | g_slist_free(device_instances); /* Returns void. */ | |
693 | device_instances = NULL; | |
694 | } | |
695 | ||
696 | static void *hw_get_device_info(int device_index, int device_info_id) | |
697 | { | |
698 | struct sr_device_instance *sdi; | |
699 | struct la8 *la8; | |
700 | void *info; | |
701 | ||
b08024a8 | 702 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
703 | |
704 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
30939770 | 705 | sr_err("la8: %s: sdi was NULL", __func__); |
f4314d7e UH |
706 | return NULL; |
707 | } | |
708 | ||
709 | if (!(la8 = sdi->priv)) { | |
30939770 | 710 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
f4314d7e UH |
711 | return NULL; |
712 | } | |
713 | ||
714 | switch (device_info_id) { | |
715 | case SR_DI_INSTANCE: | |
716 | info = sdi; | |
717 | break; | |
718 | case SR_DI_NUM_PROBES: | |
719 | info = GINT_TO_POINTER(NUM_PROBES); | |
720 | break; | |
721 | case SR_DI_SAMPLERATES: | |
722 | fill_supported_samplerates_if_needed(); | |
723 | info = &samplerates; | |
724 | break; | |
725 | case SR_DI_TRIGGER_TYPES: | |
726 | info = (char *)TRIGGER_TYPES; | |
727 | break; | |
728 | case SR_DI_CUR_SAMPLERATE: | |
729 | info = &la8->cur_samplerate; | |
730 | break; | |
731 | default: | |
732 | /* Unknown device info ID, return NULL. */ | |
30939770 | 733 | sr_err("la8: %s: Unknown device info ID", __func__); |
f4314d7e UH |
734 | info = NULL; |
735 | break; | |
736 | } | |
737 | ||
738 | return info; | |
739 | } | |
740 | ||
741 | static int hw_get_status(int device_index) | |
742 | { | |
743 | struct sr_device_instance *sdi; | |
744 | ||
745 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
b08024a8 | 746 | sr_warn("la8: %s: sdi was NULL, device not found", __func__); |
f4314d7e UH |
747 | return SR_ST_NOT_FOUND; |
748 | } | |
749 | ||
b08024a8 | 750 | sr_dbg("la8: %s: returning status %d", __func__, sdi->status); |
f4314d7e UH |
751 | |
752 | return sdi->status; | |
753 | } | |
754 | ||
755 | static int *hw_get_capabilities(void) | |
756 | { | |
b08024a8 | 757 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
758 | |
759 | return capabilities; | |
760 | } | |
761 | ||
762 | static int hw_set_configuration(int device_index, int capability, void *value) | |
763 | { | |
764 | struct sr_device_instance *sdi; | |
765 | struct la8 *la8; | |
766 | ||
b08024a8 | 767 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
768 | |
769 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
30939770 | 770 | sr_err("la8: %s: sdi was NULL", __func__); |
8703f512 | 771 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
772 | } |
773 | ||
774 | if (!(la8 = sdi->priv)) { | |
30939770 | 775 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
8703f512 | 776 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
777 | } |
778 | ||
779 | switch (capability) { | |
780 | case SR_HWCAP_SAMPLERATE: | |
781 | if (set_samplerate(sdi, *(uint64_t *)value) == SR_ERR) | |
782 | return SR_ERR; | |
b08024a8 | 783 | sr_dbg("la8: SAMPLERATE = %" PRIu64, la8->cur_samplerate); |
f4314d7e UH |
784 | break; |
785 | case SR_HWCAP_PROBECONFIG: | |
ecaf59db UH |
786 | if (configure_probes(la8, (GSList *)value) != SR_OK) { |
787 | sr_err("la8: %s: probe config failed", __func__); | |
788 | return SR_ERR; | |
789 | } | |
f4314d7e UH |
790 | break; |
791 | case SR_HWCAP_LIMIT_MSEC: | |
792 | if (*(uint64_t *)value == 0) { | |
30939770 | 793 | sr_err("la8: %s: LIMIT_MSEC can't be 0", __func__); |
f4314d7e UH |
794 | return SR_ERR; |
795 | } | |
796 | la8->limit_msec = *(uint64_t *)value; | |
b08024a8 | 797 | sr_dbg("la8: LIMIT_MSEC = %" PRIu64, la8->limit_msec); |
f4314d7e UH |
798 | break; |
799 | case SR_HWCAP_LIMIT_SAMPLES: | |
800 | if (*(uint64_t *)value < MIN_NUM_SAMPLES) { | |
30939770 | 801 | sr_err("la8: %s: LIMIT_SAMPLES too small", __func__); |
f4314d7e UH |
802 | return SR_ERR; |
803 | } | |
804 | la8->limit_samples = *(uint64_t *)value; | |
b08024a8 | 805 | sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, la8->limit_samples); |
f4314d7e UH |
806 | break; |
807 | default: | |
808 | /* Unknown capability, return SR_ERR. */ | |
30939770 | 809 | sr_err("la8: %s: Unknown capability", __func__); |
f4314d7e UH |
810 | return SR_ERR; |
811 | break; | |
812 | } | |
813 | ||
814 | return SR_OK; | |
815 | } | |
816 | ||
817 | /** | |
818 | * Get a block of 4096 bytes of data from the LA8. | |
819 | * | |
820 | * @param la8 The LA8 struct containing private per-device-instance data. | |
821 | * @return SR_OK upon success, or SR_ERR upon errors. | |
822 | */ | |
823 | static int la8_read_block(struct la8 *la8) | |
824 | { | |
825 | int i, byte_offset, m, mi, p, index, bytes_read; | |
826 | time_t now; | |
827 | ||
828 | if (!la8) { | |
30939770 | 829 | sr_err("la8: %s: la8 was NULL", __func__); |
8703f512 | 830 | return SR_ERR_ARG; |
f4314d7e UH |
831 | } |
832 | ||
833 | if (!la8->ftdic) { | |
30939770 | 834 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 835 | return SR_ERR_ARG; |
f4314d7e UH |
836 | } |
837 | ||
b08024a8 | 838 | // sr_dbg("la8: %s: reading block %d", __func__, la8->block_counter); |
f4314d7e UH |
839 | |
840 | bytes_read = la8_read(la8, la8->mangled_buf, 4096); | |
841 | ||
842 | /* If first block read got 0 bytes, retry until success or timeout. */ | |
843 | if ((bytes_read == 0) && (la8->block_counter == 0)) { | |
844 | do { | |
b08024a8 | 845 | // sr_dbg("la8: %s: reading block 0 again", __func__); |
f4314d7e UH |
846 | bytes_read = la8_read(la8, la8->mangled_buf, 4096); |
847 | /* TODO: How to handle read errors here? */ | |
848 | now = time(NULL); | |
849 | } while ((la8->done > now) && (bytes_read == 0)); | |
850 | } | |
851 | ||
852 | /* Check if block read was successful or a timeout occured. */ | |
853 | if (bytes_read != 4096) { | |
b08024a8 | 854 | sr_warn("la8: %s: trigger timed out", __func__); |
f4314d7e UH |
855 | (void) la8_reset(la8); /* Ignore errors. */ |
856 | return SR_ERR; | |
857 | } | |
858 | ||
859 | /* De-mangle the data. */ | |
b08024a8 | 860 | // sr_dbg("la8: de-mangling samples of block %d", la8->block_counter); |
f4314d7e UH |
861 | byte_offset = la8->block_counter * 4096; |
862 | m = byte_offset / (1024 * 1024); | |
863 | mi = m * (1024 * 1024); | |
864 | for (i = 0; i < 4096; i++) { | |
865 | p = i & (1 << 0); | |
866 | index = m * 2 + (((byte_offset + i) - mi) / 2) * 16; | |
867 | index += (la8->divcount == 0) ? p : (1 - p); | |
868 | la8->final_buf[index] = la8->mangled_buf[i]; | |
869 | } | |
870 | ||
871 | return SR_OK; | |
872 | } | |
873 | ||
4d7b525a UH |
874 | static void send_block_to_session_bus(struct la8 *la8, int block) |
875 | { | |
876 | int i; | |
877 | uint8_t sample, expected_sample; | |
878 | struct sr_datafeed_packet packet; | |
879 | int trigger_point; /* Relative trigger point (in this block). */ | |
880 | ||
881 | /* Note: No sanity checks on la8/block, caller is responsible. */ | |
882 | ||
883 | /* Check if we can find the trigger condition in this block. */ | |
884 | trigger_point = -1; | |
885 | expected_sample = la8->trigger_pattern & la8->trigger_mask; | |
886 | for (i = 0; i < 4096; i++) { | |
887 | /* Don't continue if the trigger was found previously. */ | |
888 | if (la8->trigger_found) | |
889 | break; | |
890 | ||
891 | sample = *(la8->final_buf + (block * 4096) + i); | |
892 | ||
893 | if ((sample & la8->trigger_mask) == expected_sample) { | |
894 | trigger_point = i; | |
895 | la8->trigger_found = 1; | |
896 | break; | |
897 | } | |
898 | } | |
899 | ||
900 | /* If no trigger was found, send one SR_DF_LOGIC packet. */ | |
901 | if (trigger_point == -1) { | |
902 | /* Send a 4096 byte SR_DF_LOGIC packet to the session bus. */ | |
903 | // sr_dbg("la8: %s: sending SR_DF_LOGIC packet", __func__); | |
904 | packet.type = SR_DF_LOGIC; | |
905 | packet.length = 4096; | |
906 | packet.unitsize = 1; | |
907 | packet.payload = la8->final_buf + (block * 4096); | |
908 | sr_session_bus(la8->session_id, &packet); | |
909 | return; | |
910 | } | |
911 | ||
912 | /* | |
913 | * We found the trigger, so some special handling is needed. We have | |
914 | * to send an SR_DF_LOGIC packet with the samples before the trigger | |
915 | * (if any), then the SD_DF_TRIGGER packet itself, then another | |
916 | * SR_DF_LOGIC packet with the samples after the trigger (if any). | |
917 | */ | |
918 | ||
919 | /* TODO: Send SR_DF_TRIGGER packet before or after the actual sample? */ | |
920 | ||
921 | /* If at least one sample is located before the trigger... */ | |
922 | if (trigger_point > 0) { | |
923 | /* Send pre-trigger SR_DF_LOGIC packet to the session bus. */ | |
924 | sr_dbg("la8: %s: sending pre-trigger SR_DF_LOGIC packet, ", | |
925 | "start = %" PRIu64 ", length = %d", __func__, | |
926 | block * 4096, trigger_point); | |
927 | packet.type = SR_DF_LOGIC; | |
928 | packet.length = trigger_point; | |
929 | packet.unitsize = 1; | |
930 | packet.payload = la8->final_buf + (block * 4096); | |
931 | sr_session_bus(la8->session_id, &packet); | |
932 | } | |
933 | ||
934 | /* Send the SR_DF_TRIGGER packet to the session bus. */ | |
935 | sr_dbg("la8: %s: sending SR_DF_TRIGGER packet, sample = %" PRIu64, | |
936 | __func__, (block * 4096) + trigger_point); | |
937 | packet.type = SR_DF_TRIGGER; | |
938 | packet.length = 0; | |
939 | packet.unitsize = 0; | |
940 | packet.payload = NULL; | |
941 | sr_session_bus(la8->session_id, &packet); | |
942 | ||
943 | /* If at least one sample is located after the trigger... */ | |
944 | if (trigger_point < (4096 - 1)) { | |
945 | /* Send post-trigger SR_DF_LOGIC packet to the session bus. */ | |
946 | sr_dbg("la8: %s: sending post-trigger SR_DF_LOGIC packet, ", | |
947 | "start = %" PRIu64 ", length = %d", __func__, | |
948 | (block * 4096) + trigger_point, | |
949 | (4096 - 1) - trigger_point); | |
950 | packet.type = SR_DF_LOGIC; | |
951 | packet.length = (4096 - 1) - trigger_point; | |
952 | packet.unitsize = 1; | |
953 | packet.payload = la8->final_buf + (block * 4096) | |
954 | + trigger_point; | |
955 | sr_session_bus(la8->session_id, &packet); | |
956 | } | |
957 | } | |
958 | ||
f4314d7e UH |
959 | static int receive_data(int fd, int revents, void *user_data) |
960 | { | |
961 | int i, ret; | |
962 | struct sr_device_instance *sdi; | |
f4314d7e UH |
963 | struct la8 *la8; |
964 | ||
965 | /* Avoid compiler errors. */ | |
966 | fd = fd; | |
967 | revents = revents; | |
968 | ||
969 | if (!(sdi = user_data)) { | |
30939770 | 970 | sr_err("la8: %s: user_data was NULL", __func__); |
f4314d7e UH |
971 | return FALSE; |
972 | } | |
973 | ||
974 | if (!(la8 = sdi->priv)) { | |
30939770 | 975 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
f4314d7e UH |
976 | return FALSE; |
977 | } | |
978 | ||
979 | /* Get one block of data (4096 bytes). */ | |
980 | if ((ret = la8_read_block(la8)) < 0) { | |
30939770 | 981 | sr_err("la8: %s: la8_read_block error: %d", __func__, ret); |
ecaf59db | 982 | hw_stop_acquisition(sdi->index, user_data); |
f4314d7e UH |
983 | return FALSE; |
984 | } | |
985 | ||
986 | /* We need to get exactly 2048 blocks (i.e. 8MB) of data. */ | |
987 | if (la8->block_counter != 2047) { | |
988 | la8->block_counter++; | |
989 | return TRUE; | |
990 | } | |
991 | ||
b08024a8 | 992 | sr_dbg("la8: sampling finished, sending data to session bus now"); |
f4314d7e UH |
993 | |
994 | /* All data was received and demangled, send it to the session bus. */ | |
4d7b525a UH |
995 | for (i = 0; i < 2048; i++) |
996 | send_block_to_session_bus(la8, i); | |
f4314d7e UH |
997 | |
998 | hw_stop_acquisition(sdi->index, user_data); | |
999 | ||
1000 | // return FALSE; /* FIXME? */ | |
1001 | return TRUE; | |
1002 | } | |
1003 | ||
1004 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
1005 | { | |
1006 | struct sr_device_instance *sdi; | |
1007 | struct la8 *la8; | |
1008 | struct sr_datafeed_packet packet; | |
1009 | struct sr_datafeed_header header; | |
1010 | uint8_t buf[4]; | |
1011 | int bytes_written; | |
1012 | ||
b08024a8 | 1013 | sr_dbg("la8: entering %s", __func__); |
f4314d7e UH |
1014 | |
1015 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
30939770 | 1016 | sr_err("la8: %s: sdi was NULL", __func__); |
8703f512 | 1017 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
1018 | } |
1019 | ||
1020 | if (!(la8 = sdi->priv)) { | |
30939770 | 1021 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
8703f512 | 1022 | return SR_ERR; /* TODO: SR_ERR_ARG? */ |
f4314d7e UH |
1023 | } |
1024 | ||
1025 | if (!la8->ftdic) { | |
30939770 | 1026 | sr_err("la8: %s: la8->ftdic was NULL", __func__); |
8703f512 | 1027 | return SR_ERR_ARG; |
f4314d7e UH |
1028 | } |
1029 | ||
1030 | la8->divcount = samplerate_to_divcount(la8->cur_samplerate); | |
1031 | if (la8->divcount == 0xff) { | |
30939770 | 1032 | sr_err("la8: %s: invalid divcount/samplerate", __func__); |
f4314d7e UH |
1033 | return SR_ERR; |
1034 | } | |
1035 | ||
1036 | /* Fill acquisition parameters into buf[]. */ | |
1037 | buf[0] = la8->divcount; | |
1038 | buf[1] = 0xff; /* This byte must always be 0xff. */ | |
1039 | buf[2] = la8->trigger_pattern; | |
1040 | buf[3] = la8->trigger_mask; | |
1041 | ||
1042 | /* Start acquisition. */ | |
1043 | bytes_written = la8_write(la8, buf, 4); | |
1044 | ||
1045 | if (bytes_written < 0) { | |
30939770 | 1046 | sr_err("la8: acquisition failed to start"); |
f4314d7e UH |
1047 | return SR_ERR; |
1048 | } else if (bytes_written != 4) { | |
30939770 | 1049 | sr_err("la8: acquisition failed to start"); |
f4314d7e UH |
1050 | return SR_ERR; /* TODO: Other error and return code? */ |
1051 | } | |
1052 | ||
b08024a8 | 1053 | sr_dbg("la8: acquisition started successfully"); |
f4314d7e UH |
1054 | |
1055 | la8->session_id = session_device_id; | |
1056 | ||
1057 | /* Send header packet to the session bus. */ | |
b08024a8 | 1058 | sr_dbg("la8: %s: sending SR_DF_HEADER", __func__); |
f4314d7e UH |
1059 | packet.type = SR_DF_HEADER; |
1060 | packet.length = sizeof(struct sr_datafeed_header); | |
1061 | packet.unitsize = 0; | |
1062 | packet.payload = &header; | |
1063 | header.feed_version = 1; | |
1064 | gettimeofday(&header.starttime, NULL); | |
1065 | header.samplerate = la8->cur_samplerate; | |
1066 | header.protocol_id = SR_PROTO_RAW; | |
4bc5fd45 | 1067 | header.num_logic_probes = NUM_PROBES; |
f4314d7e UH |
1068 | header.num_analog_probes = 0; |
1069 | sr_session_bus(session_device_id, &packet); | |
1070 | ||
1071 | /* Time when we should be done (for detecting trigger timeouts). */ | |
1072 | la8->done = (la8->divcount + 1) * 0.08388608 + time(NULL) | |
1073 | + la8->trigger_timeout; | |
1074 | la8->block_counter = 0; | |
4d7b525a | 1075 | la8->trigger_found = 0; |
f4314d7e UH |
1076 | |
1077 | /* Hook up a dummy handler to receive data from the LA8. */ | |
1078 | sr_source_add(-1, G_IO_IN, 0, receive_data, sdi); | |
1079 | ||
1080 | return SR_OK; | |
1081 | } | |
1082 | ||
1083 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) | |
1084 | { | |
1085 | struct sr_device_instance *sdi; | |
1086 | struct la8 *la8; | |
1087 | struct sr_datafeed_packet packet; | |
1088 | ||
b08024a8 | 1089 | sr_dbg("la8: stopping acquisition"); |
f4314d7e UH |
1090 | |
1091 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { | |
30939770 | 1092 | sr_err("la8: %s: sdi was NULL", __func__); |
f4314d7e UH |
1093 | return; |
1094 | } | |
1095 | ||
1096 | if (!(la8 = sdi->priv)) { | |
30939770 | 1097 | sr_err("la8: %s: sdi->priv was NULL", __func__); |
f4314d7e UH |
1098 | return; |
1099 | } | |
1100 | ||
f4314d7e | 1101 | /* Send end packet to the session bus. */ |
b08024a8 | 1102 | sr_dbg("la8: %s: sending SR_DF_END", __func__); |
f4314d7e UH |
1103 | packet.type = SR_DF_END; |
1104 | packet.length = 0; | |
1105 | packet.unitsize = 0; | |
1106 | packet.payload = NULL; | |
1107 | sr_session_bus(session_device_id, &packet); | |
1108 | } | |
1109 | ||
1110 | struct sr_device_plugin chronovu_la8_plugin_info = { | |
1111 | .name = "chronovu-la8", | |
1112 | .longname = "ChronoVu LA8", | |
1113 | .api_version = 1, | |
1114 | .init = hw_init, | |
1115 | .cleanup = hw_cleanup, | |
86f5e3d8 UH |
1116 | .opendev = hw_opendev, |
1117 | .closedev = hw_closedev, | |
f4314d7e UH |
1118 | .get_device_info = hw_get_device_info, |
1119 | .get_status = hw_get_status, | |
1120 | .get_capabilities = hw_get_capabilities, | |
1121 | .set_configuration = hw_set_configuration, | |
1122 | .start_acquisition = hw_start_acquisition, | |
1123 | .stop_acquisition = hw_stop_acquisition, | |
1124 | }; |