+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <glib.h>
-#include <libusb.h>
-#include <stdlib.h>
-#include <string.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-
-#define VICTOR_VID 0x1244
-#define VICTOR_PID 0xd237
-#define VICTOR_VENDOR "Victor"
-#define VICTOR_INTERFACE 0
-#define VICTOR_ENDPOINT LIBUSB_ENDPOINT_IN | 1
-
-SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
-static struct sr_dev_driver *di = &victor_dmm_driver_info;
-static int hw_dev_close(struct sr_dev_inst *sdi);
-static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
-
-static const int hwcaps[] = {
- SR_HWCAP_MULTIMETER,
- SR_HWCAP_LIMIT_MSEC,
- SR_HWCAP_LIMIT_SAMPLES,
- SR_HWCAP_CONTINUOUS,
- 0
-};
-
-/* Properly close and free all devices. */
-static int clear_instances(void)
-{
- struct sr_dev_inst *sdi;
- struct drv_context *drvc;
- struct dev_context *devc;
- GSList *l;
-
- if (!(drvc = di->priv))
- /* Can get called on an unused driver, doesn't matter. */
- return SR_OK;
-
- for (l = drvc->instances; l; l = l->next) {
- if (!(sdi = l->data))
- continue;
- if (!(devc = sdi->priv))
- continue;
- hw_dev_close(sdi);
- sr_usb_dev_inst_free(devc->usb);
- sr_dev_inst_free(sdi);
- }
-
- g_slist_free(drvc->instances);
- drvc->instances = NULL;
-
- return SR_OK;
-}
-
-static int hw_init(struct sr_context *sr_ctx)
-{
- struct drv_context *drvc;
-
- if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
- sr_err("Driver context malloc failed.");
- return SR_ERR_MALLOC;
- }
- drvc->sr_ctx = sr_ctx;
- di->priv = drvc;
-
- return SR_OK;
-}
-
-static GSList *hw_scan(GSList *options)
-{
- struct drv_context *drvc;
- struct dev_context *devc;
- struct sr_dev_inst *sdi;
- struct sr_probe *probe;
- struct libusb_device_descriptor des;
- libusb_device **devlist;
- GSList *devices;
- int ret, devcnt, i;
-
- (void)options;
-
- if (!(drvc = di->priv)) {
- sr_err("Driver was not initialized.");
- return NULL;
- }
-
- /* USB scan is always authoritative. */
- clear_instances();
-
- devices = NULL;
- libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
- for (i = 0; devlist[i]; i++) {
- if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
- sr_warn("Failed to get device descriptor: %s",
- libusb_error_name(ret));
- continue;
- }
-
- if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID)
- continue;
-
- devcnt = g_slist_length(drvc->instances);
- if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
- VICTOR_VENDOR, NULL, NULL)))
- return NULL;
- sdi->driver = di;
-
- if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
- return NULL;
- sdi->priv = devc;
-
- if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
- return NULL;
- sdi->probes = g_slist_append(NULL, probe);
-
- if (!(devc->usb = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
- libusb_get_device_address(devlist[i]), NULL)))
- return NULL;
-
- drvc->instances = g_slist_append(drvc->instances, sdi);
- devices = g_slist_append(devices, sdi);
- }
- libusb_free_device_list(devlist, 1);
-
- return devices;
-}
-
-static GSList *hw_dev_list(void)
-{
- struct drv_context *drvc;
-
- if (!(drvc = di->priv)) {
- sr_err("Driver was not initialized.");
- return NULL;
- }
-
- return drvc->instances;
-}
-
-static int hw_dev_open(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct drv_context *drvc = di->priv;
- libusb_device **devlist;
- int ret, i;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
- for (i = 0; devlist[i]; i++) {
- if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
- || libusb_get_device_address(devlist[i]) != devc->usb->address)
- continue;
- if ((ret = libusb_open(devlist[i], &devc->usb->devhdl))) {
- sr_err("Failed to open device: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
- break;
- }
- libusb_free_device_list(devlist, 1);
- if (!devlist[i]) {
- sr_err("Device not found.");
- return SR_ERR;
- }
-
- /* The device reports as HID class, so the kernel would have
- * claimed it. */
- if (libusb_kernel_driver_active(devc->usb->devhdl, 0) == 1) {
- if ((ret = libusb_detach_kernel_driver(devc->usb->devhdl, 0)) < 0) {
- sr_err("Failed to detach kernel driver: %s.",
- libusb_error_name(ret));
- return SR_ERR;
- }
- }
-
- if ((ret = libusb_claim_interface(devc->usb->devhdl,
- VICTOR_INTERFACE))) {
- sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
- sdi->status = SR_ST_ACTIVE;
-
- return SR_OK;
-}
-
-static int hw_dev_close(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- if (!devc->usb->devhdl)
- /* Nothing to do. */
- return SR_OK;
-
- libusb_release_interface(devc->usb->devhdl, VICTOR_INTERFACE);
- libusb_close(devc->usb->devhdl);
- devc->usb->devhdl = NULL;
- sdi->status = SR_ST_INACTIVE;
-
- return SR_OK;
-}
-
-static int hw_cleanup(void)
-{
- struct drv_context *drvc;
-
- if (!(drvc = di->priv))
- /* Can get called on an unused driver, doesn't matter. */
- return SR_OK;
-
- clear_instances();
- g_free(drvc);
- di->priv = NULL;
-
- return SR_OK;
-}
-
-static int hw_info_get(int info_id, const void **data,
- const struct sr_dev_inst *sdi)
-{
- (void)sdi;
-
- switch (info_id) {
- case SR_DI_HWCAPS:
- *data = hwcaps;
- break;
- default:
- return SR_ERR_ARG;
- }
-
- return SR_OK;
-}
-
-static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
- const void *value)
-{
- struct dev_context *devc;
- gint64 now;
- int ret;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- if (sdi->status != SR_ST_ACTIVE) {
- sr_err("Device inactive, can't set config options.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- ret = SR_OK;
- switch (hwcap) {
- case SR_HWCAP_LIMIT_MSEC:
- devc->limit_msec = *(const int64_t *)value;
- now = g_get_monotonic_time() / 1000;
- devc->end_time = now + devc->limit_msec;
- sr_dbg("Setting time limit to %" PRIu64 "ms.",
- devc->limit_msec);
- break;
- case SR_HWCAP_LIMIT_SAMPLES:
- devc->limit_samples = *(const uint64_t *)value;
- sr_dbg("Setting sample limit to %" PRIu64 ".",
- devc->limit_samples);
- break;
- default:
- sr_err("Unknown hardware capability: %d.", hwcap);
- ret = SR_ERR_ARG;
- }
-
- return ret;
-}
-
-static void receive_transfer(struct libusb_transfer *transfer)
-{
- struct dev_context *devc;
- struct sr_dev_inst *sdi;
- int ret;
-
- sdi = transfer->user_data;
- devc = sdi->priv;
- if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
- /* USB device was unplugged. */
- hw_dev_acquisition_stop(sdi, sdi);
- } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
- sr_dbg("Got %d-byte packet.", transfer->actual_length);
- if (transfer->actual_length == DMM_DATA_SIZE) {
- victor_dmm_receive_data(sdi, transfer->buffer);
- if (devc->limit_samples) {
- if (devc->num_samples >= devc->limit_samples)
- hw_dev_acquisition_stop(sdi, sdi);
- }
- }
- }
- /* Anything else is either an error or a timeout, which is fine:
- * we were just going to send another transfer request anyway. */
-
- if (sdi->status == SR_ST_ACTIVE) {
- /* Send the same request again. */
- if ((ret = libusb_submit_transfer(transfer) != 0)) {
- sr_err("Unable to resubmit transfer: %s.",
- libusb_error_name(ret));
- g_free(transfer->buffer);
- libusb_free_transfer(transfer);
- hw_dev_acquisition_stop(sdi, sdi);
- }
- } else {
- /* This was the last transfer we're going to receive, so
- * clean up now. */
- g_free(transfer->buffer);
- libusb_free_transfer(transfer);
- }
-}
-
-static int handle_events(int fd, int revents, void *cb_data)
-{
- struct dev_context *devc;
- struct drv_context *drvc = di->priv;
- struct sr_datafeed_packet packet;
- struct sr_dev_inst *sdi;
- struct timeval tv;
- gint64 now;
- int i;
-
- (void)fd;
- (void)revents;
-
- sdi = cb_data;
- devc = sdi->priv;
-
- if (devc->limit_msec) {
- now = g_get_monotonic_time() / 1000;
- if (now > devc->end_time)
- hw_dev_acquisition_stop(sdi, sdi);
- }
-
- if (sdi->status == SR_ST_STOPPING) {
- for (i = 0; devc->usbfd[i] != -1; i++)
- sr_source_remove(devc->usbfd[i]);
-
- hw_dev_close(sdi);
-
- packet.type = SR_DF_END;
- sr_session_send(cb_data, &packet);
- }
-
- memset(&tv, 0, sizeof(struct timeval));
- libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
- NULL);
-
- return TRUE;
-}
-
-static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
- void *cb_data)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_header header;
- struct sr_datafeed_meta_analog meta;
- struct dev_context *devc;
- struct drv_context *drvc = di->priv;
- const struct libusb_pollfd **pfd;
- struct libusb_transfer *transfer;
- int ret, i;
- unsigned char *buf;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- sr_dbg("Starting acquisition.");
-
- devc = sdi->priv;
- devc->cb_data = cb_data;
-
- /* Send header packet to the session bus. */
- sr_dbg("Sending SR_DF_HEADER.");
- packet.type = SR_DF_HEADER;
- packet.payload = (uint8_t *)&header;
- header.feed_version = 1;
- sr_session_send(devc->cb_data, &packet);
-
- /* Send metadata about the SR_DF_ANALOG packets to come. */
- packet.type = SR_DF_META_ANALOG;
- packet.payload = &meta;
- meta.num_probes = 1;
- sr_session_send(devc->cb_data, &packet);
-
- pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
- for (i = 0; pfd[i]; i++) {
- /* Handle USB events every 100ms, for decent latency. */
- sr_source_add(pfd[i]->fd, pfd[i]->events, 100,
- handle_events, (void *)sdi);
- /* We'll need to remove this fd later. */
- devc->usbfd[i] = pfd[i]->fd;
- }
- devc->usbfd[i] = -1;
-
- buf = g_try_malloc(DMM_DATA_SIZE);
- transfer = libusb_alloc_transfer(0);
- /* Each transfer request gets 100ms to arrive before it's restarted.
- * The device only sends 1 transfer/second no matter how many
- * times you ask, but we want to keep step with the USB events
- * handling above. */
- libusb_fill_interrupt_transfer(transfer, devc->usb->devhdl,
- VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer,
- cb_data, 100);
- if ((ret = libusb_submit_transfer(transfer) != 0)) {
- sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
- libusb_free_transfer(transfer);
- g_free(buf);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
-{
- (void)cb_data;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- if (sdi->status != SR_ST_ACTIVE) {
- sr_err("Device not active, can't stop acquisition.");
- return SR_ERR;
- }
-
- sdi->status = SR_ST_STOPPING;
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_dev_driver victor_dmm_driver_info = {
- .name = "victor-dmm",
- .longname = "Victor DMMs",
- .api_version = 1,
- .init = hw_init,
- .cleanup = hw_cleanup,
- .scan = hw_scan,
- .dev_list = hw_dev_list,
- .dev_clear = clear_instances,
- .dev_open = hw_dev_open,
- .dev_close = hw_dev_close,
- .info_get = hw_info_get,
- .dev_config_set = hw_dev_config_set,
- .dev_acquisition_start = hw_dev_acquisition_start,
- .dev_acquisition_stop = hw_dev_acquisition_stop,
- .priv = NULL,
-};
projects / libsigrok.git / blobdiff