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 int dev_acquisition_stop(struct sr_dev_inst *sdi);
37 static const uint32_t drvopts[] = {
41 static const uint32_t scanopts[] = {
45 static const uint32_t devopts[] = {
47 SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
48 SR_CONF_LIMIT_MSEC | SR_CONF_SET,
49 SR_CONF_CONN | SR_CONF_GET,
52 static GSList *scan(struct sr_dev_driver *di, GSList *options)
54 struct drv_context *drvc;
55 struct dev_context *devc;
56 struct sr_dev_inst *sdi;
57 struct libusb_device_descriptor des;
58 libusb_device **devlist;
61 char connection_id[64];
68 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
69 for (i = 0; devlist[i]; i++) {
70 libusb_get_device_descriptor(devlist[i], &des);
72 if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID)
75 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
77 sdi = g_malloc0(sizeof(struct sr_dev_inst));
78 sdi->status = SR_ST_INACTIVE;
79 sdi->vendor = g_strdup(VICTOR_VENDOR);
80 sdi->connection_id = g_strdup(connection_id);
81 devc = g_malloc0(sizeof(struct dev_context));
82 sr_sw_limits_init(&devc->limits);
85 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
86 sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
87 libusb_get_device_address(devlist[i]), NULL);
88 sdi->inst_type = SR_INST_USB;
90 devices = g_slist_append(devices, sdi);
92 libusb_free_device_list(devlist, 1);
94 return std_scan_complete(di, devices);
97 static int dev_open(struct sr_dev_inst *sdi)
99 struct sr_dev_driver *di = sdi->driver;
100 struct drv_context *drvc = di->context;
101 struct sr_usb_dev_inst *usb;
106 ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
110 /* The device reports as HID class, so the kernel would have
112 if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
113 if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
114 sr_err("Failed to detach kernel driver: %s.",
115 libusb_error_name(ret));
120 if ((ret = libusb_claim_interface(usb->devhdl,
121 VICTOR_INTERFACE))) {
122 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
125 sdi->status = SR_ST_ACTIVE;
130 static int dev_close(struct sr_dev_inst *sdi)
132 struct sr_usb_dev_inst *usb;
140 libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
141 libusb_close(usb->devhdl);
143 sdi->status = SR_ST_INACTIVE;
148 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
149 const struct sr_channel_group *cg)
151 struct dev_context *devc = sdi->priv;
152 struct sr_usb_dev_inst *usb;
159 if (!sdi || !sdi->conn)
162 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
163 *data = g_variant_new_string(str);
165 case SR_CONF_LIMIT_SAMPLES:
166 case SR_CONF_LIMIT_MSEC:
167 return sr_sw_limits_config_get(&devc->limits, key, data);
175 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
176 const struct sr_channel_group *cg)
178 struct dev_context *devc;
182 if (sdi->status != SR_ST_ACTIVE)
183 return SR_ERR_DEV_CLOSED;
187 return sr_sw_limits_config_set(&devc->limits, key, data);
190 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
191 const struct sr_channel_group *cg)
197 case SR_CONF_SCAN_OPTIONS:
198 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
199 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
201 case SR_CONF_DEVICE_OPTIONS:
203 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
204 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
206 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
207 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
216 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
218 struct dev_context *devc;
219 struct sr_dev_inst *sdi;
222 sdi = transfer->user_data;
224 if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
225 /* USB device was unplugged. */
226 dev_acquisition_stop(sdi);
227 } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
228 sr_dbg("Got %d-byte packet.", transfer->actual_length);
229 if (transfer->actual_length == DMM_DATA_SIZE) {
230 victor_dmm_receive_data(sdi, transfer->buffer);
231 if (sr_sw_limits_check(&devc->limits))
232 dev_acquisition_stop(sdi);
235 /* Anything else is either an error or a timeout, which is fine:
236 * we were just going to send another transfer request anyway. */
238 if (sdi->status == SR_ST_ACTIVE) {
239 /* Send the same request again. */
240 if ((ret = libusb_submit_transfer(transfer) != 0)) {
241 sr_err("Unable to resubmit transfer: %s.",
242 libusb_error_name(ret));
243 g_free(transfer->buffer);
244 libusb_free_transfer(transfer);
245 dev_acquisition_stop(sdi);
248 /* This was the last transfer we're going to receive, so
250 g_free(transfer->buffer);
251 libusb_free_transfer(transfer);
255 static int handle_events(int fd, int revents, void *cb_data)
257 struct dev_context *devc;
258 struct drv_context *drvc;
259 struct sr_dev_inst *sdi;
260 struct sr_dev_driver *di;
271 if (sr_sw_limits_check(&devc->limits))
272 dev_acquisition_stop(sdi);
274 if (sdi->status == SR_ST_STOPPING) {
275 usb_source_remove(sdi->session, drvc->sr_ctx);
277 std_session_send_df_end(sdi);
280 memset(&tv, 0, sizeof(struct timeval));
281 libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
287 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
289 struct sr_dev_driver *di = sdi->driver;
290 struct drv_context *drvc = di->context;
291 struct sr_usb_dev_inst *usb;
292 struct libusb_transfer *transfer;
296 if (sdi->status != SR_ST_ACTIVE)
297 return SR_ERR_DEV_CLOSED;
301 std_session_send_df_header(sdi);
303 usb_source_add(sdi->session, drvc->sr_ctx, 100,
304 handle_events, (void *)sdi);
306 buf = g_malloc(DMM_DATA_SIZE);
307 transfer = libusb_alloc_transfer(0);
308 /* Each transfer request gets 100ms to arrive before it's restarted.
309 * The device only sends 1 transfer/second no matter how many
310 * times you ask, but we want to keep step with the USB events
312 libusb_fill_interrupt_transfer(transfer, usb->devhdl,
313 VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
314 (struct sr_dev_inst *)sdi, 100);
315 if ((ret = libusb_submit_transfer(transfer) != 0)) {
316 sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
317 libusb_free_transfer(transfer);
325 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
327 if (sdi->status != SR_ST_ACTIVE) {
328 sr_err("Device not active, can't stop acquisition.");
332 sdi->status = SR_ST_STOPPING;
337 static struct sr_dev_driver victor_dmm_driver_info = {
338 .name = "victor-dmm",
339 .longname = "Victor DMMs",
342 .cleanup = std_cleanup,
344 .dev_list = std_dev_list,
346 .config_get = config_get,
347 .config_set = config_set,
348 .config_list = config_list,
349 .dev_open = dev_open,
350 .dev_close = dev_close,
351 .dev_acquisition_start = dev_acquisition_start,
352 .dev_acquisition_stop = dev_acquisition_stop,
355 SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info);