2 * This file is part of the libsigrok project.
4 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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 3 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, see <http://www.gnu.org/licenses/>.
22 #include "libsigrok.h"
23 #include "libsigrok-internal.h"
26 SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address);
27 SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
28 static struct sr_dev_driver *di = &lascar_el_usb_driver_info;
29 static int hw_dev_close(struct sr_dev_inst *sdi);
31 static const int hwopts[] = {
36 static const int hwcaps[] = {
39 SR_CONF_LIMIT_SAMPLES,
43 /* Properly close and free all devices. */
44 static int clear_instances(void)
46 struct sr_dev_inst *sdi;
47 struct drv_context *drvc;
48 struct dev_context *devc;
51 if (!(drvc = di->priv))
54 for (l = drvc->instances; l; l = l->next) {
57 if (!(devc = sdi->priv))
61 sr_usb_dev_inst_free(devc->usb);
62 sr_dev_inst_free(sdi);
65 g_slist_free(drvc->instances);
66 drvc->instances = NULL;
71 static int hw_init(struct sr_context *sr_ctx)
73 struct drv_context *drvc;
75 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
76 sr_err("Driver context malloc failed.");
80 drvc->sr_ctx = sr_ctx;
86 static GSList *hw_scan(GSList *options)
88 struct drv_context *drvc;
89 struct dev_context *devc;
90 struct sr_dev_inst *sdi;
91 struct sr_usb_dev_inst *usb;
92 struct sr_config *src;
93 GSList *usb_devices, *devices, *l;
100 /* USB scan is always authoritative. */
104 for (l = options; l; l = l->next) {
116 if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
117 /* We have a list of sr_usb_dev_inst matching the connection
118 * string. Wrap them in sr_dev_inst and we're done. */
119 for (l = usb_devices; l; l = l->next) {
121 if (!(sdi = lascar_scan(usb->bus, usb->address))) {
122 /* Not a Lascar EL-USB. */
128 drvc->instances = g_slist_append(drvc->instances, sdi);
129 devices = g_slist_append(devices, sdi);
131 g_slist_free(usb_devices);
133 g_slist_free_full(usb_devices, g_free);
138 static GSList *hw_dev_list(void)
140 struct drv_context *drvc;
142 if (!(drvc = di->priv)) {
143 sr_err("Driver was not initialized.");
147 return drvc->instances;
150 static int hw_dev_open(struct sr_dev_inst *sdi)
152 struct drv_context *drvc;
153 struct dev_context *devc;
156 if (!(drvc = di->priv)) {
157 sr_err("Driver was not initialized.");
162 if (sr_usb_open(drvc->sr_ctx->libusb_ctx, devc->usb) != SR_OK)
165 if ((ret = libusb_claim_interface(devc->usb->devhdl, LASCAR_INTERFACE))) {
166 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
169 sdi->status = SR_ST_ACTIVE;
174 static int hw_dev_close(struct sr_dev_inst *sdi)
176 struct dev_context *devc;
179 sr_err("Driver was not initialized.");
184 if (!devc->usb->devhdl)
188 libusb_release_interface(devc->usb->devhdl, LASCAR_INTERFACE);
189 libusb_close(devc->usb->devhdl);
190 devc->usb->devhdl = NULL;
191 g_free(devc->config);
192 sdi->status = SR_ST_INACTIVE;
198 static int hw_cleanup(void)
200 struct drv_context *drvc;
202 if (!(drvc = di->priv))
203 /* Can get called on an unused driver, doesn't matter. */
213 static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
215 struct dev_context *devc;
219 sr_err("Driver was not initialized.");
222 if (sdi->status != SR_ST_ACTIVE) {
223 sr_err("Device inactive, can't set config options.");
230 case SR_CONF_LIMIT_SAMPLES:
231 devc->limit_samples = *(const uint64_t *)value;
232 sr_dbg("Setting sample limit to %" PRIu64 ".",
233 devc->limit_samples);
236 sr_err("Unknown hardware capability: %d.", id);
243 static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
249 case SR_CONF_SCAN_OPTIONS:
252 case SR_CONF_DEVICE_OPTIONS:
262 static void mark_xfer(struct libusb_transfer *xfer)
265 if (xfer->status == LIBUSB_TRANSFER_COMPLETED)
266 xfer->user_data = GINT_TO_POINTER(1);
268 xfer->user_data = GINT_TO_POINTER(-1);
272 /* The Lascar software, in its infinite ignorance, reads a set of four
273 * bytes from the device config struct and interprets it as a float.
274 * That only works because they only use windows, and only on x86. However
275 * we may be running on any architecture, any operating system. So we have
276 * to convert these four bytes as the Lascar software would on windows/x86,
277 * to the local representation of a float.
278 * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */
279 static float binary32_le_to_float(unsigned char *buf)
284 f.mpn.sign = (buf[3] & 0x80) ? 1 : 0;
285 f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7);
286 f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16);
291 static int lascar_proc_config(const struct sr_dev_inst *sdi)
293 struct dev_context *devc;
297 if (!(devc->config = lascar_get_config(devc->usb->devhdl)))
301 switch (devc->profile->logformat) {
303 devc->sample_size = 2;
304 devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8);
305 if (devc->temp_unit != 0 && devc->temp_unit != 1) {
306 sr_dbg("invalid temperature unit %d", devc->temp_unit);
307 /* Default to Celcius, we're all adults here. */
310 sr_dbg("temperature unit is %s", devc->temp_unit
311 ? "Fahrenheit" : "Celcius");
314 devc->sample_size = 2;
315 devc->co_high = binary32_le_to_float(devc->config + 0x24);
316 devc->co_low = binary32_le_to_float(devc->config + 0x28);
317 sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high,
323 devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8);
324 sr_dbg("device log contains %d samples.", devc->logged_samples);
329 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
332 struct sr_datafeed_packet packet;
333 struct sr_datafeed_header header;
334 struct dev_context *devc;
335 struct drv_context *drvc = di->priv;
336 struct libusb_transfer *xfer_in, *xfer_out;
337 const struct libusb_pollfd **pfd;
340 unsigned char cmd[3], resp[4], *buf;
343 sr_err("Driver was not initialized.");
348 devc->cb_data = cb_data;
350 if (lascar_proc_config(sdi) != SR_OK)
353 sr_dbg("Starting log retrieval.");
355 /* Send header packet to the session bus. */
356 sr_dbg("Sending SR_DF_HEADER.");
357 packet.type = SR_DF_HEADER;
358 packet.payload = (uint8_t *)&header;
359 header.feed_version = 1;
360 sr_session_send(devc->cb_data, &packet);
362 if (devc->logged_samples == 0) {
363 /* This ensures the frontend knows the session is done. */
364 packet.type = SR_DF_END;
365 sr_session_send(devc->cb_data, &packet);
369 if (!(xfer_in = libusb_alloc_transfer(0)) ||
370 !(xfer_out = libusb_alloc_transfer(0)))
373 libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
374 0x00, 0xffff, 0x00, NULL, 0, 50);
375 libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
376 0x02, 0x0002, 0x00, NULL, 0, 50);
377 libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
378 0x02, 0x0001, 0x00, NULL, 0, 50);
381 /* Flush input. The F321 requires this. */
382 while (libusb_bulk_transfer(devc->usb->devhdl, LASCAR_EP_IN, resp,
383 256, &ret, 5) == 0 && ret > 0)
386 libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
387 resp, sizeof(resp), mark_xfer, 0, 10000);
388 if (libusb_submit_transfer(xfer_in) != 0) {
389 libusb_free_transfer(xfer_in);
390 libusb_free_transfer(xfer_out);
397 libusb_fill_bulk_transfer(xfer_out, devc->usb->devhdl, LASCAR_EP_OUT,
398 cmd, 3, mark_xfer, 0, 100);
399 if (libusb_submit_transfer(xfer_out) != 0) {
400 libusb_free_transfer(xfer_in);
401 libusb_free_transfer(xfer_out);
407 while (!xfer_in->user_data || !xfer_out->user_data) {
409 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
411 if (xfer_in->user_data != GINT_TO_POINTER(1) ||
412 xfer_in->user_data != GINT_TO_POINTER(1)) {
413 sr_dbg("no response to log transfer request");
414 libusb_free_transfer(xfer_in);
415 libusb_free_transfer(xfer_out);
418 if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) {
419 sr_dbg("invalid response to log transfer request");
420 libusb_free_transfer(xfer_in);
421 libusb_free_transfer(xfer_out);
424 devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8);
425 libusb_free_transfer(xfer_out);
427 pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
428 for (i = 0; pfd[i]; i++) {
429 /* Handle USB events every 100ms, for decent latency. */
430 sr_source_add(pfd[i]->fd, pfd[i]->events, 100,
431 lascar_el_usb_handle_events, (void *)sdi);
432 /* We'll need to remove this fd later. */
433 devc->usbfd[i] = pfd[i]->fd;
437 buf = g_try_malloc(4096);
438 libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
439 buf, 4096, lascar_el_usb_receive_transfer, cb_data, 100);
440 if ((ret = libusb_submit_transfer(xfer_in) != 0)) {
441 sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
442 libusb_free_transfer(xfer_in);
450 SR_PRIV int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
455 sr_err("Driver was not initialized.");
459 if (sdi->status != SR_ST_ACTIVE) {
460 sr_err("Device inactive, can't stop acquisition.");
464 sdi->status = SR_ST_STOPPING;
465 /* TODO: free ongoing transfers? */
470 SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info = {
471 .name = "lascar-el-usb",
472 .longname = "Lascar EL-USB",
475 .cleanup = hw_cleanup,
477 .dev_list = hw_dev_list,
478 .dev_clear = clear_instances,
479 .config_set = config_set,
480 .config_list = config_list,
481 .dev_open = hw_dev_open,
482 .dev_close = hw_dev_close,
483 .dev_acquisition_start = hw_dev_acquisition_start,
484 .dev_acquisition_stop = hw_dev_acquisition_stop,