2 * This file is part of the libsigrok project.
4 * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
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.
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.
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
23 SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
24 static struct sr_dev_driver *di = &chronovu_la8_driver_info;
27 * This will be initialized via config_list()/SR_CONF_SAMPLERATE.
29 * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
30 * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
32 SR_PRIV uint64_t cv_samplerates[255] = { 0 };
34 SR_PRIV const int32_t cv_hwcaps[] = {
35 SR_CONF_LOGIC_ANALYZER,
37 SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */
38 SR_CONF_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
42 * The ChronoVu LA8 can have multiple PIDs. Older versions shipped with
43 * a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867.
45 static const uint16_t usb_pids[] = {
50 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
52 static void clear_helper(void *priv)
54 struct dev_context *devc;
58 ftdi_free(devc->ftdic);
59 g_free(devc->final_buf);
62 static int dev_clear(void)
64 return std_dev_clear(di, clear_helper);
67 static int init(struct sr_context *sr_ctx)
69 return std_init(sr_ctx, di, LOG_PREFIX);
72 static GSList *scan(GSList *options)
74 struct sr_dev_inst *sdi;
75 struct sr_channel *ch;
76 struct drv_context *drvc;
77 struct dev_context *devc;
88 /* Allocate memory for our private device context. */
89 devc = g_try_malloc(sizeof(struct dev_context));
91 /* Set some sane defaults. */
93 devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
95 devc->limit_samples = 0;
97 memset(devc->mangled_buf, 0, BS);
98 devc->final_buf = NULL;
99 devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
100 devc->trigger_mask = 0x00; /* All channels are "don't care". */
101 devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */
102 devc->trigger_found = 0;
104 devc->block_counter = 0;
105 devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */
108 /* Allocate memory where we'll store the de-mangled data. */
109 if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
110 sr_err("Failed to allocate memory for sample buffer.");
114 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
115 if (!(devc->ftdic = ftdi_new())) {
116 sr_err("Failed to initialize libftdi.");
117 goto err_free_final_buf;
120 /* Check for the device and temporarily open it. */
121 for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
122 sr_dbg("Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
124 ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
125 usb_pids[i], USB_DESCRIPTION, NULL);
127 sr_dbg("Found LA8 device (%04x:%04x).",
128 USB_VENDOR_ID, usb_pids[i]);
129 devc->usb_pid = usb_pids[i];
133 if (devc->usb_pid == 0)
136 /* Register the device with libsigrok. */
137 sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
138 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
140 sr_err("Failed to create device instance.");
141 goto err_close_ftdic;
146 for (i = 0; cv_channel_names[i]; i++) {
147 if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
148 cv_channel_names[i])))
150 sdi->channels = g_slist_append(sdi->channels, ch);
153 devices = g_slist_append(devices, sdi);
154 drvc->instances = g_slist_append(drvc->instances, sdi);
156 /* Close device. We'll reopen it again when we need it. */
157 (void) cv_close(devc); /* Log, but ignore errors. */
162 (void) cv_close(devc); /* Log, but ignore errors. */
164 ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
166 g_free(devc->final_buf);
174 static GSList *dev_list(void)
176 return ((struct drv_context *)(di->priv))->instances;
179 static int dev_open(struct sr_dev_inst *sdi)
181 struct dev_context *devc;
184 if (!(devc = sdi->priv))
187 sr_dbg("Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
190 /* Open the device. */
191 if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
192 devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
193 sr_err("Failed to open FTDI device (%d): %s.",
194 ret, ftdi_get_error_string(devc->ftdic));
195 (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
198 sr_dbg("Device opened successfully.");
200 /* Purge RX/TX buffers in the FTDI chip. */
201 if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
202 sr_err("Failed to purge FTDI buffers (%d): %s.",
203 ret, ftdi_get_error_string(devc->ftdic));
204 (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
205 goto err_dev_open_close_ftdic;
207 sr_dbg("FTDI buffers purged successfully.");
209 /* Enable flow control in the FTDI chip. */
210 if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
211 sr_err("Failed to enable FTDI flow control (%d): %s.",
212 ret, ftdi_get_error_string(devc->ftdic));
213 (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
214 goto err_dev_open_close_ftdic;
216 sr_dbg("FTDI flow control enabled successfully.");
219 g_usleep(100 * 1000);
221 sdi->status = SR_ST_ACTIVE;
225 err_dev_open_close_ftdic:
226 (void) cv_close(devc); /* Log, but ignore errors. */
230 static int dev_close(struct sr_dev_inst *sdi)
232 struct dev_context *devc;
236 if (sdi->status == SR_ST_ACTIVE) {
237 sr_dbg("Status ACTIVE, closing device.");
238 (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
240 sr_spew("Status not ACTIVE, nothing to do.");
243 sdi->status = SR_ST_INACTIVE;
248 static int cleanup(void)
253 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
254 const struct sr_channel_group *cg)
256 struct dev_context *devc;
261 case SR_CONF_SAMPLERATE:
262 if (!sdi || !(devc = sdi->priv))
264 *data = g_variant_new_uint64(devc->cur_samplerate);
273 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
274 const struct sr_channel_group *cg)
276 struct dev_context *devc;
280 if (sdi->status != SR_ST_ACTIVE)
281 return SR_ERR_DEV_CLOSED;
283 if (!(devc = sdi->priv))
287 case SR_CONF_SAMPLERATE:
288 if (set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
291 case SR_CONF_LIMIT_MSEC:
292 if (g_variant_get_uint64(data) == 0)
294 devc->limit_msec = g_variant_get_uint64(data);
296 case SR_CONF_LIMIT_SAMPLES:
297 if (g_variant_get_uint64(data) == 0)
299 devc->limit_samples = g_variant_get_uint64(data);
308 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
309 const struct sr_channel_group *cg)
311 GVariant *gvar, *grange[2];
318 case SR_CONF_DEVICE_OPTIONS:
319 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
320 cv_hwcaps, ARRAY_SIZE(cv_hwcaps),
323 case SR_CONF_SAMPLERATE:
324 cv_fill_samplerates_if_needed();
325 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
326 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
327 cv_samplerates, ARRAY_SIZE(cv_samplerates),
329 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
330 *data = g_variant_builder_end(&gvb);
332 case SR_CONF_LIMIT_SAMPLES:
333 grange[0] = g_variant_new_uint64(0);
334 grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES);
335 *data = g_variant_new_tuple(grange, 2);
337 case SR_CONF_TRIGGER_TYPE:
338 *data = g_variant_new_string(TRIGGER_TYPE);
347 static int receive_data(int fd, int revents, void *cb_data)
350 struct sr_dev_inst *sdi;
351 struct dev_context *devc;
356 if (!(sdi = cb_data)) {
357 sr_err("cb_data was NULL.");
361 if (!(devc = sdi->priv)) {
362 sr_err("sdi->priv was NULL.");
367 sr_err("devc->ftdic was NULL.");
371 /* Get one block of data. */
372 if ((ret = cv_read_block(devc)) < 0) {
373 sr_err("Failed to read data block: %d.", ret);
374 dev_acquisition_stop(sdi, sdi);
378 /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
379 if (devc->block_counter != (NUM_BLOCKS - 1)) {
380 devc->block_counter++;
384 sr_dbg("Sampling finished, sending data to session bus now.");
386 /* All data was received and demangled, send it to the session bus. */
387 for (i = 0; i < NUM_BLOCKS; i++)
388 cv_send_block_to_session_bus(devc, i);
390 dev_acquisition_stop(sdi, sdi);
395 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
397 struct dev_context *devc;
401 if (sdi->status != SR_ST_ACTIVE)
402 return SR_ERR_DEV_CLOSED;
404 if (!(devc = sdi->priv)) {
405 sr_err("sdi->priv was NULL.");
410 sr_err("devc->ftdic was NULL.");
414 devc->divcount = cv_samplerate_to_divcount(devc->cur_samplerate);
415 if (devc->divcount == 0xff) {
416 sr_err("Invalid divcount/samplerate.");
420 if (cv_configure_channels(sdi) != SR_OK) {
421 sr_err("Failed to configure channels.");
425 /* Fill acquisition parameters into buf[]. */
426 buf[0] = devc->divcount;
427 buf[1] = 0xff; /* This byte must always be 0xff. */
428 buf[2] = devc->trigger_pattern;
429 buf[3] = devc->trigger_mask;
431 /* Start acquisition. */
432 bytes_written = cv_write(devc, buf, 4);
434 if (bytes_written < 0) {
435 sr_err("Acquisition failed to start: %d.", bytes_written);
437 } else if (bytes_written != 4) {
438 sr_err("Acquisition failed to start: %d.", bytes_written);
442 sr_dbg("Hardware acquisition started successfully.");
444 devc->cb_data = cb_data;
446 /* Send header packet to the session bus. */
447 std_session_send_df_header(cb_data, LOG_PREFIX);
449 /* Time when we should be done (for detecting trigger timeouts). */
450 devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL)
451 + devc->trigger_timeout;
452 devc->block_counter = 0;
453 devc->trigger_found = 0;
455 /* Hook up a dummy handler to receive data from the device. */
456 sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
461 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
463 struct sr_datafeed_packet packet;
467 sr_dbg("Stopping acquisition.");
468 sr_source_remove(-1);
470 /* Send end packet to the session bus. */
471 sr_dbg("Sending SR_DF_END.");
472 packet.type = SR_DF_END;
473 sr_session_send(cb_data, &packet);
478 SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
479 .name = "chronovu-la8",
480 .longname = "ChronoVu LA8",
485 .dev_list = dev_list,
486 .dev_clear = dev_clear,
487 .config_get = config_get,
488 .config_set = config_set,
489 .config_list = config_list,
490 .dev_open = dev_open,
491 .dev_close = dev_close,
492 .dev_acquisition_start = dev_acquisition_start,
493 .dev_acquisition_stop = dev_acquisition_stop,