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/>.
24 #include "libsigrok.h"
25 #include "libsigrok-internal.h"
28 #define VICTOR_VID 0x1244
29 #define VICTOR_PID 0xd237
30 #define VICTOR_VENDOR "Victor"
31 #define VICTOR_INTERFACE 0
32 #define VICTOR_ENDPOINT LIBUSB_ENDPOINT_IN | 1
34 SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
35 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
37 static const uint32_t drvopts[] = {
40 static const uint32_t scanopts[] = {
44 static const uint32_t devopts[] = {
46 SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
47 SR_CONF_LIMIT_MSEC | SR_CONF_SET,
48 SR_CONF_CONN | SR_CONF_GET,
51 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
53 return std_init(sr_ctx, di, LOG_PREFIX);
56 static GSList *scan(struct sr_dev_driver *di, GSList *options)
58 struct drv_context *drvc;
59 struct dev_context *devc;
60 struct sr_dev_inst *sdi;
61 struct libusb_device_descriptor des;
62 libusb_device **devlist;
65 char connection_id[64];
72 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
73 for (i = 0; devlist[i]; i++) {
74 if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
75 sr_warn("Failed to get device descriptor: %s",
76 libusb_error_name(ret));
80 if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID)
83 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
85 sdi = g_malloc0(sizeof(struct sr_dev_inst));
86 sdi->status = SR_ST_INACTIVE;
87 sdi->vendor = g_strdup(VICTOR_VENDOR);
89 sdi->connection_id = g_strdup(connection_id);
90 devc = g_malloc0(sizeof(struct dev_context));
93 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
95 sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
96 libusb_get_device_address(devlist[i]), NULL);
97 sdi->inst_type = SR_INST_USB;
99 drvc->instances = g_slist_append(drvc->instances, sdi);
100 devices = g_slist_append(devices, sdi);
102 libusb_free_device_list(devlist, 1);
107 static GSList *dev_list(const struct sr_dev_driver *di)
109 return ((struct drv_context *)(di->priv))->instances;
112 static int dev_open(struct sr_dev_inst *sdi)
114 struct sr_dev_driver *di = sdi->driver;
115 struct drv_context *drvc = di->priv;
116 struct sr_usb_dev_inst *usb;
117 libusb_device **devlist;
119 char connection_id[64];
122 sr_err("Driver was not initialized.");
128 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
129 for (i = 0; devlist[i]; i++) {
130 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
131 if (strcmp(sdi->connection_id, connection_id))
133 if ((ret = libusb_open(devlist[i], &usb->devhdl))) {
134 sr_err("Failed to open device: %s.", libusb_error_name(ret));
139 libusb_free_device_list(devlist, 1);
141 sr_err("Device not found.");
145 /* The device reports as HID class, so the kernel would have
147 if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
148 if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
149 sr_err("Failed to detach kernel driver: %s.",
150 libusb_error_name(ret));
155 if ((ret = libusb_claim_interface(usb->devhdl,
156 VICTOR_INTERFACE))) {
157 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
160 sdi->status = SR_ST_ACTIVE;
165 static int dev_close(struct sr_dev_inst *sdi)
167 struct sr_dev_driver *di = sdi->driver;
168 struct sr_usb_dev_inst *usb;
171 sr_err("Driver was not initialized.");
181 libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
182 libusb_close(usb->devhdl);
184 sdi->status = SR_ST_INACTIVE;
189 static int cleanup(const struct sr_dev_driver *di)
192 struct drv_context *drvc;
194 if (!(drvc = di->priv))
195 /* Can get called on an unused driver, doesn't matter. */
199 ret = std_dev_clear(di, NULL);
205 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
206 const struct sr_channel_group *cg)
208 struct sr_usb_dev_inst *usb;
215 if (!sdi || !sdi->conn)
218 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
219 *data = g_variant_new_string(str);
228 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
229 const struct sr_channel_group *cg)
231 struct sr_dev_driver *di = sdi->driver;
232 struct dev_context *devc;
238 if (sdi->status != SR_ST_ACTIVE)
239 return SR_ERR_DEV_CLOSED;
242 sr_err("Driver was not initialized.");
249 case SR_CONF_LIMIT_MSEC:
250 devc->limit_msec = g_variant_get_uint64(data);
251 now = g_get_monotonic_time() / 1000;
252 devc->end_time = now + devc->limit_msec;
253 sr_dbg("Setting time limit to %" PRIu64 "ms.",
256 case SR_CONF_LIMIT_SAMPLES:
257 devc->limit_samples = g_variant_get_uint64(data);
258 sr_dbg("Setting sample limit to %" PRIu64 ".",
259 devc->limit_samples);
268 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
269 const struct sr_channel_group *cg)
275 case SR_CONF_SCAN_OPTIONS:
276 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
277 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
279 case SR_CONF_DEVICE_OPTIONS:
281 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
282 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
284 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
285 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
294 static void receive_transfer(struct libusb_transfer *transfer)
296 struct dev_context *devc;
297 struct sr_dev_inst *sdi;
300 sdi = transfer->user_data;
302 if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
303 /* USB device was unplugged. */
304 dev_acquisition_stop(sdi, sdi);
305 } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
306 sr_dbg("Got %d-byte packet.", transfer->actual_length);
307 if (transfer->actual_length == DMM_DATA_SIZE) {
308 victor_dmm_receive_data(sdi, transfer->buffer);
309 if (devc->limit_samples) {
310 if (devc->num_samples >= devc->limit_samples)
311 dev_acquisition_stop(sdi, sdi);
315 /* Anything else is either an error or a timeout, which is fine:
316 * we were just going to send another transfer request anyway. */
318 if (sdi->status == SR_ST_ACTIVE) {
319 /* Send the same request again. */
320 if ((ret = libusb_submit_transfer(transfer) != 0)) {
321 sr_err("Unable to resubmit transfer: %s.",
322 libusb_error_name(ret));
323 g_free(transfer->buffer);
324 libusb_free_transfer(transfer);
325 dev_acquisition_stop(sdi, sdi);
328 /* This was the last transfer we're going to receive, so
330 g_free(transfer->buffer);
331 libusb_free_transfer(transfer);
335 static int handle_events(int fd, int revents, void *cb_data)
337 struct dev_context *devc;
338 struct drv_context *drvc;
339 struct sr_datafeed_packet packet;
340 struct sr_dev_inst *sdi;
341 struct sr_dev_driver *di;
353 if (devc->limit_msec) {
354 now = g_get_monotonic_time() / 1000;
355 if (now > devc->end_time)
356 dev_acquisition_stop(sdi, sdi);
359 if (sdi->status == SR_ST_STOPPING) {
360 usb_source_remove(sdi->session, drvc->sr_ctx);
364 packet.type = SR_DF_END;
365 sr_session_send(cb_data, &packet);
368 memset(&tv, 0, sizeof(struct timeval));
369 libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
375 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
377 struct sr_dev_driver *di = sdi->driver;
378 struct dev_context *devc;
379 struct drv_context *drvc = di->priv;
380 struct sr_usb_dev_inst *usb;
381 struct libusb_transfer *transfer;
385 if (sdi->status != SR_ST_ACTIVE)
386 return SR_ERR_DEV_CLOSED;
389 sr_err("Driver was not initialized.");
395 devc->cb_data = cb_data;
397 /* Send header packet to the session bus. */
398 std_session_send_df_header(cb_data, LOG_PREFIX);
400 usb_source_add(sdi->session, drvc->sr_ctx, 100,
401 handle_events, (void *)sdi);
403 buf = g_try_malloc(DMM_DATA_SIZE);
404 transfer = libusb_alloc_transfer(0);
405 /* Each transfer request gets 100ms to arrive before it's restarted.
406 * The device only sends 1 transfer/second no matter how many
407 * times you ask, but we want to keep step with the USB events
409 libusb_fill_interrupt_transfer(transfer, usb->devhdl,
410 VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
412 if ((ret = libusb_submit_transfer(transfer) != 0)) {
413 sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
414 libusb_free_transfer(transfer);
422 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
424 struct sr_dev_driver *di = sdi->driver;
428 sr_err("Driver was not initialized.");
432 if (sdi->status != SR_ST_ACTIVE) {
433 sr_err("Device not active, can't stop acquisition.");
437 sdi->status = SR_ST_STOPPING;
442 SR_PRIV struct sr_dev_driver victor_dmm_driver_info = {
443 .name = "victor-dmm",
444 .longname = "Victor DMMs",
449 .dev_list = dev_list,
451 .config_get = config_get,
452 .config_set = config_set,
453 .config_list = config_list,
454 .dev_open = dev_open,
455 .dev_close = dev_close,
456 .dev_acquisition_start = dev_acquisition_start,
457 .dev_acquisition_stop = dev_acquisition_stop,