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/>.
25 #include <libsigrok/libsigrok.h>
26 #include "libsigrok-internal.h"
29 #define VICTOR_VID 0x1244
30 #define VICTOR_PID 0xd237
31 #define VICTOR_VENDOR "Victor"
32 #define VICTOR_INTERFACE 0
33 #define VICTOR_ENDPOINT (LIBUSB_ENDPOINT_IN | 1)
35 static const uint32_t drvopts[] = {
39 static const uint32_t scanopts[] = {
43 static const uint32_t devopts[] = {
45 SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
46 SR_CONF_LIMIT_MSEC | SR_CONF_SET,
47 SR_CONF_CONN | SR_CONF_GET,
50 static GSList *scan(struct sr_dev_driver *di, GSList *options)
52 struct drv_context *drvc;
53 struct dev_context *devc;
54 struct sr_dev_inst *sdi;
55 struct libusb_device_descriptor des;
56 libusb_device **devlist;
59 char connection_id[64];
66 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
67 for (i = 0; devlist[i]; i++) {
68 libusb_get_device_descriptor(devlist[i], &des);
70 if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID)
73 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
75 sdi = g_malloc0(sizeof(struct sr_dev_inst));
76 sdi->status = SR_ST_INACTIVE;
77 sdi->vendor = g_strdup(VICTOR_VENDOR);
78 sdi->connection_id = g_strdup(connection_id);
79 devc = g_malloc0(sizeof(struct dev_context));
80 sr_sw_limits_init(&devc->limits);
83 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
84 sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
85 libusb_get_device_address(devlist[i]), NULL);
86 sdi->inst_type = SR_INST_USB;
88 devices = g_slist_append(devices, sdi);
90 libusb_free_device_list(devlist, 1);
92 return std_scan_complete(di, devices);
95 static int dev_open(struct sr_dev_inst *sdi)
97 struct sr_dev_driver *di = sdi->driver;
98 struct drv_context *drvc = di->context;
99 struct sr_usb_dev_inst *usb;
104 ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
108 /* The device reports as HID class, so the kernel would have
110 if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
111 if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
112 sr_err("Failed to detach kernel driver: %s.",
113 libusb_error_name(ret));
118 if ((ret = libusb_claim_interface(usb->devhdl,
119 VICTOR_INTERFACE))) {
120 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
127 static int dev_close(struct sr_dev_inst *sdi)
129 struct sr_usb_dev_inst *usb;
136 libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
137 libusb_close(usb->devhdl);
143 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
144 const struct sr_channel_group *cg)
146 struct dev_context *devc = sdi->priv;
147 struct sr_usb_dev_inst *usb;
154 if (!sdi || !sdi->conn)
157 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
158 *data = g_variant_new_string(str);
160 case SR_CONF_LIMIT_SAMPLES:
161 case SR_CONF_LIMIT_MSEC:
162 return sr_sw_limits_config_get(&devc->limits, key, data);
170 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
171 const struct sr_channel_group *cg)
173 struct dev_context *devc;
179 return sr_sw_limits_config_set(&devc->limits, key, data);
182 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
183 const struct sr_channel_group *cg)
185 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
188 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
190 struct dev_context *devc;
191 struct sr_dev_inst *sdi;
194 sdi = transfer->user_data;
196 if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
197 /* USB device was unplugged. */
198 sr_dev_acquisition_stop(sdi);
199 } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
200 sr_dbg("Got %d-byte packet.", transfer->actual_length);
201 if (transfer->actual_length == DMM_DATA_SIZE) {
202 victor_dmm_receive_data(sdi, transfer->buffer);
203 if (sr_sw_limits_check(&devc->limits))
204 sr_dev_acquisition_stop(sdi);
207 /* Anything else is either an error or a timeout, which is fine:
208 * we were just going to send another transfer request anyway. */
210 if (sdi->status == SR_ST_ACTIVE) {
211 /* Send the same request again. */
212 if ((ret = libusb_submit_transfer(transfer) != 0)) {
213 sr_err("Unable to resubmit transfer: %s.",
214 libusb_error_name(ret));
215 g_free(transfer->buffer);
216 libusb_free_transfer(transfer);
217 sr_dev_acquisition_stop(sdi);
220 /* This was the last transfer we're going to receive, so
222 g_free(transfer->buffer);
223 libusb_free_transfer(transfer);
227 static int handle_events(int fd, int revents, void *cb_data)
229 struct dev_context *devc;
230 struct drv_context *drvc;
231 struct sr_dev_inst *sdi;
232 struct sr_dev_driver *di;
243 if (sr_sw_limits_check(&devc->limits))
244 sr_dev_acquisition_stop(sdi);
246 if (sdi->status == SR_ST_STOPPING) {
247 usb_source_remove(sdi->session, drvc->sr_ctx);
249 std_session_send_df_end(sdi);
252 memset(&tv, 0, sizeof(struct timeval));
253 libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
259 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
261 struct sr_dev_driver *di = sdi->driver;
262 struct drv_context *drvc = di->context;
263 struct sr_usb_dev_inst *usb;
264 struct libusb_transfer *transfer;
270 std_session_send_df_header(sdi);
272 usb_source_add(sdi->session, drvc->sr_ctx, 100,
273 handle_events, (void *)sdi);
275 buf = g_malloc(DMM_DATA_SIZE);
276 transfer = libusb_alloc_transfer(0);
277 /* Each transfer request gets 100ms to arrive before it's restarted.
278 * The device only sends 1 transfer/second no matter how many
279 * times you ask, but we want to keep step with the USB events
281 libusb_fill_interrupt_transfer(transfer, usb->devhdl,
282 VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
283 (struct sr_dev_inst *)sdi, 100);
284 if ((ret = libusb_submit_transfer(transfer) != 0)) {
285 sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
286 libusb_free_transfer(transfer);
294 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
296 sdi->status = SR_ST_STOPPING;
301 static struct sr_dev_driver victor_dmm_driver_info = {
302 .name = "victor-dmm",
303 .longname = "Victor DMMs",
306 .cleanup = std_cleanup,
308 .dev_list = std_dev_list,
309 .dev_clear = std_dev_clear,
310 .config_get = config_get,
311 .config_set = config_set,
312 .config_list = config_list,
313 .dev_open = dev_open,
314 .dev_close = dev_close,
315 .dev_acquisition_start = dev_acquisition_start,
316 .dev_acquisition_stop = dev_acquisition_stop,
319 SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info);