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));
123 sdi->status = SR_ST_ACTIVE;
128 static int dev_close(struct sr_dev_inst *sdi)
130 struct sr_usb_dev_inst *usb;
138 libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
139 libusb_close(usb->devhdl);
141 sdi->status = SR_ST_INACTIVE;
146 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
147 const struct sr_channel_group *cg)
149 struct dev_context *devc = sdi->priv;
150 struct sr_usb_dev_inst *usb;
157 if (!sdi || !sdi->conn)
160 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
161 *data = g_variant_new_string(str);
163 case SR_CONF_LIMIT_SAMPLES:
164 case SR_CONF_LIMIT_MSEC:
165 return sr_sw_limits_config_get(&devc->limits, key, data);
173 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
174 const struct sr_channel_group *cg)
176 struct dev_context *devc;
180 if (sdi->status != SR_ST_ACTIVE)
181 return SR_ERR_DEV_CLOSED;
185 return sr_sw_limits_config_set(&devc->limits, key, data);
188 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
189 const struct sr_channel_group *cg)
195 case SR_CONF_SCAN_OPTIONS:
196 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
197 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
199 case SR_CONF_DEVICE_OPTIONS:
201 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
202 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
204 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
205 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
214 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
216 struct dev_context *devc;
217 struct sr_dev_inst *sdi;
220 sdi = transfer->user_data;
222 if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
223 /* USB device was unplugged. */
224 sr_dev_acquisition_stop(sdi);
225 } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
226 sr_dbg("Got %d-byte packet.", transfer->actual_length);
227 if (transfer->actual_length == DMM_DATA_SIZE) {
228 victor_dmm_receive_data(sdi, transfer->buffer);
229 if (sr_sw_limits_check(&devc->limits))
230 sr_dev_acquisition_stop(sdi);
233 /* Anything else is either an error or a timeout, which is fine:
234 * we were just going to send another transfer request anyway. */
236 if (sdi->status == SR_ST_ACTIVE) {
237 /* Send the same request again. */
238 if ((ret = libusb_submit_transfer(transfer) != 0)) {
239 sr_err("Unable to resubmit transfer: %s.",
240 libusb_error_name(ret));
241 g_free(transfer->buffer);
242 libusb_free_transfer(transfer);
243 sr_dev_acquisition_stop(sdi);
246 /* This was the last transfer we're going to receive, so
248 g_free(transfer->buffer);
249 libusb_free_transfer(transfer);
253 static int handle_events(int fd, int revents, void *cb_data)
255 struct dev_context *devc;
256 struct drv_context *drvc;
257 struct sr_dev_inst *sdi;
258 struct sr_dev_driver *di;
269 if (sr_sw_limits_check(&devc->limits))
270 sr_dev_acquisition_stop(sdi);
272 if (sdi->status == SR_ST_STOPPING) {
273 usb_source_remove(sdi->session, drvc->sr_ctx);
275 std_session_send_df_end(sdi);
278 memset(&tv, 0, sizeof(struct timeval));
279 libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
285 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
287 struct sr_dev_driver *di = sdi->driver;
288 struct drv_context *drvc = di->context;
289 struct sr_usb_dev_inst *usb;
290 struct libusb_transfer *transfer;
296 std_session_send_df_header(sdi);
298 usb_source_add(sdi->session, drvc->sr_ctx, 100,
299 handle_events, (void *)sdi);
301 buf = g_malloc(DMM_DATA_SIZE);
302 transfer = libusb_alloc_transfer(0);
303 /* Each transfer request gets 100ms to arrive before it's restarted.
304 * The device only sends 1 transfer/second no matter how many
305 * times you ask, but we want to keep step with the USB events
307 libusb_fill_interrupt_transfer(transfer, usb->devhdl,
308 VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
309 (struct sr_dev_inst *)sdi, 100);
310 if ((ret = libusb_submit_transfer(transfer) != 0)) {
311 sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
312 libusb_free_transfer(transfer);
320 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
322 sdi->status = SR_ST_STOPPING;
327 static struct sr_dev_driver victor_dmm_driver_info = {
328 .name = "victor-dmm",
329 .longname = "Victor DMMs",
332 .cleanup = std_cleanup,
334 .dev_list = std_dev_list,
336 .config_get = config_get,
337 .config_set = config_set,
338 .config_list = config_list,
339 .dev_open = dev_open,
340 .dev_close = dev_close,
341 .dev_acquisition_start = dev_acquisition_start,
342 .dev_acquisition_stop = dev_acquisition_stop,
345 SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info);