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 return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
76 static GSList *hw_scan(GSList *options)
78 struct drv_context *drvc;
79 struct dev_context *devc;
80 struct sr_dev_inst *sdi;
81 struct sr_usb_dev_inst *usb;
82 struct sr_config *src;
83 GSList *usb_devices, *devices, *l;
90 /* USB scan is always authoritative. */
94 for (l = options; l; l = l->next) {
106 if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
107 /* We have a list of sr_usb_dev_inst matching the connection
108 * string. Wrap them in sr_dev_inst and we're done. */
109 for (l = usb_devices; l; l = l->next) {
111 if (!(sdi = lascar_scan(usb->bus, usb->address))) {
112 /* Not a Lascar EL-USB. */
118 drvc->instances = g_slist_append(drvc->instances, sdi);
119 devices = g_slist_append(devices, sdi);
121 g_slist_free(usb_devices);
123 g_slist_free_full(usb_devices, g_free);
128 static GSList *hw_dev_list(void)
130 struct drv_context *drvc;
132 if (!(drvc = di->priv)) {
133 sr_err("Driver was not initialized.");
137 return drvc->instances;
140 static int hw_dev_open(struct sr_dev_inst *sdi)
142 struct drv_context *drvc;
143 struct dev_context *devc;
146 if (!(drvc = di->priv)) {
147 sr_err("Driver was not initialized.");
152 if (sr_usb_open(drvc->sr_ctx->libusb_ctx, devc->usb) != SR_OK)
155 if ((ret = libusb_claim_interface(devc->usb->devhdl, LASCAR_INTERFACE))) {
156 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
159 sdi->status = SR_ST_ACTIVE;
164 static int hw_dev_close(struct sr_dev_inst *sdi)
166 struct dev_context *devc;
169 sr_err("Driver was not initialized.");
174 if (!devc->usb->devhdl)
178 libusb_release_interface(devc->usb->devhdl, LASCAR_INTERFACE);
179 libusb_close(devc->usb->devhdl);
180 devc->usb->devhdl = NULL;
181 g_free(devc->config);
182 sdi->status = SR_ST_INACTIVE;
188 static int hw_cleanup(void)
190 struct drv_context *drvc;
192 if (!(drvc = di->priv))
193 /* Can get called on an unused driver, doesn't matter. */
203 static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
205 struct dev_context *devc;
209 sr_err("Driver was not initialized.");
212 if (sdi->status != SR_ST_ACTIVE) {
213 sr_err("Device inactive, can't set config options.");
220 case SR_CONF_LIMIT_SAMPLES:
221 devc->limit_samples = *(const uint64_t *)value;
222 sr_dbg("Setting sample limit to %" PRIu64 ".",
223 devc->limit_samples);
226 sr_err("Unknown hardware capability: %d.", id);
233 static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
239 case SR_CONF_SCAN_OPTIONS:
242 case SR_CONF_DEVICE_OPTIONS:
252 static void mark_xfer(struct libusb_transfer *xfer)
255 if (xfer->status == LIBUSB_TRANSFER_COMPLETED)
256 xfer->user_data = GINT_TO_POINTER(1);
258 xfer->user_data = GINT_TO_POINTER(-1);
262 /* The Lascar software, in its infinite ignorance, reads a set of four
263 * bytes from the device config struct and interprets it as a float.
264 * That only works because they only use windows, and only on x86. However
265 * we may be running on any architecture, any operating system. So we have
266 * to convert these four bytes as the Lascar software would on windows/x86,
267 * to the local representation of a float.
268 * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */
269 static float binary32_le_to_float(unsigned char *buf)
274 f.mpn.sign = (buf[3] & 0x80) ? 1 : 0;
275 f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7);
276 f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16);
281 static int lascar_proc_config(const struct sr_dev_inst *sdi)
283 struct dev_context *devc;
287 if (!(devc->config = lascar_get_config(devc->usb->devhdl)))
291 switch (devc->profile->logformat) {
293 devc->sample_size = 2;
294 devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8);
295 if (devc->temp_unit != 0 && devc->temp_unit != 1) {
296 sr_dbg("invalid temperature unit %d", devc->temp_unit);
297 /* Default to Celcius, we're all adults here. */
300 sr_dbg("temperature unit is %s", devc->temp_unit
301 ? "Fahrenheit" : "Celcius");
304 devc->sample_size = 2;
305 devc->co_high = binary32_le_to_float(devc->config + 0x24);
306 devc->co_low = binary32_le_to_float(devc->config + 0x28);
307 sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high,
313 devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8);
314 sr_dbg("device log contains %d samples.", devc->logged_samples);
319 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
322 struct sr_datafeed_packet packet;
323 struct sr_datafeed_header header;
324 struct dev_context *devc;
325 struct drv_context *drvc = di->priv;
326 struct libusb_transfer *xfer_in, *xfer_out;
327 const struct libusb_pollfd **pfd;
330 unsigned char cmd[3], resp[4], *buf;
333 sr_err("Driver was not initialized.");
338 devc->cb_data = cb_data;
340 if (lascar_proc_config(sdi) != SR_OK)
343 sr_dbg("Starting log retrieval.");
345 /* Send header packet to the session bus. */
346 sr_dbg("Sending SR_DF_HEADER.");
347 packet.type = SR_DF_HEADER;
348 packet.payload = (uint8_t *)&header;
349 header.feed_version = 1;
350 sr_session_send(devc->cb_data, &packet);
352 if (devc->logged_samples == 0) {
353 /* This ensures the frontend knows the session is done. */
354 packet.type = SR_DF_END;
355 sr_session_send(devc->cb_data, &packet);
359 if (!(xfer_in = libusb_alloc_transfer(0)) ||
360 !(xfer_out = libusb_alloc_transfer(0)))
363 libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
364 0x00, 0xffff, 0x00, NULL, 0, 50);
365 libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
366 0x02, 0x0002, 0x00, NULL, 0, 50);
367 libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
368 0x02, 0x0001, 0x00, NULL, 0, 50);
371 /* Flush input. The F321 requires this. */
372 while (libusb_bulk_transfer(devc->usb->devhdl, LASCAR_EP_IN, resp,
373 256, &ret, 5) == 0 && ret > 0)
376 libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
377 resp, sizeof(resp), mark_xfer, 0, 10000);
378 if (libusb_submit_transfer(xfer_in) != 0) {
379 libusb_free_transfer(xfer_in);
380 libusb_free_transfer(xfer_out);
387 libusb_fill_bulk_transfer(xfer_out, devc->usb->devhdl, LASCAR_EP_OUT,
388 cmd, 3, mark_xfer, 0, 100);
389 if (libusb_submit_transfer(xfer_out) != 0) {
390 libusb_free_transfer(xfer_in);
391 libusb_free_transfer(xfer_out);
397 while (!xfer_in->user_data || !xfer_out->user_data) {
399 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
401 if (xfer_in->user_data != GINT_TO_POINTER(1) ||
402 xfer_in->user_data != GINT_TO_POINTER(1)) {
403 sr_dbg("no response to log transfer request");
404 libusb_free_transfer(xfer_in);
405 libusb_free_transfer(xfer_out);
408 if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) {
409 sr_dbg("invalid response to log transfer request");
410 libusb_free_transfer(xfer_in);
411 libusb_free_transfer(xfer_out);
414 devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8);
415 libusb_free_transfer(xfer_out);
417 pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
418 for (i = 0; pfd[i]; i++) {
419 /* Handle USB events every 100ms, for decent latency. */
420 sr_source_add(pfd[i]->fd, pfd[i]->events, 100,
421 lascar_el_usb_handle_events, (void *)sdi);
422 /* We'll need to remove this fd later. */
423 devc->usbfd[i] = pfd[i]->fd;
427 buf = g_try_malloc(4096);
428 libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
429 buf, 4096, lascar_el_usb_receive_transfer, cb_data, 100);
430 if ((ret = libusb_submit_transfer(xfer_in) != 0)) {
431 sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
432 libusb_free_transfer(xfer_in);
440 SR_PRIV int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
445 sr_err("Driver was not initialized.");
449 if (sdi->status != SR_ST_ACTIVE) {
450 sr_err("Device inactive, can't stop acquisition.");
454 sdi->status = SR_ST_STOPPING;
455 /* TODO: free ongoing transfers? */
460 SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info = {
461 .name = "lascar-el-usb",
462 .longname = "Lascar EL-USB",
465 .cleanup = hw_cleanup,
467 .dev_list = hw_dev_list,
468 .dev_clear = clear_instances,
469 .config_set = config_set,
470 .config_list = config_list,
471 .dev_open = hw_dev_open,
472 .dev_close = hw_dev_close,
473 .dev_acquisition_start = hw_dev_acquisition_start,
474 .dev_acquisition_stop = hw_dev_acquisition_stop,