#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"
+#include <libusb.h>
+#include <stdlib.h>
+#include <string.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
+};
+
+static const char *probe_names[] = {
+ "P1",
+};
+
/* Properly close and free all devices. */
static int clear_instances(void)
struct dev_context *devc;
GSList *l;
- drvc = di->priv;
+ 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;
-
- /* TODO */
-
+ hw_dev_close(sdi);
+ sr_usb_dev_inst_free(devc->usb);
sr_dev_inst_free(sdi);
}
sr_err("Driver context malloc failed.");
return SR_ERR_MALLOC;
}
-
- /* TODO */
-
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;
- drvc = di->priv;
- drvc->instances = NULL;
+ libusb_get_device_list(NULL, &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;
+ }
- /* TODO */
+ 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;
}
{
struct drv_context *drvc;
- drvc = di->priv;
+ 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)
{
- /* TODO */
+ struct dev_context *devc;
+ 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(NULL, &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 (libusb_detach_kernel_driver(devc->usb->devhdl, 0) < 0) {
+ sr_err("Failed to detach kernel driver.");
+ 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)
{
- /* TODO */
+ 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)
{
- clear_instances();
+ struct drv_context *drvc;
+
+ if (!(drvc = di->priv))
+ /* Can get called on an unused driver, doesn't matter. */
+ return SR_OK;
- /* TODO */
+ 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) {
- /* TODO */
- default:
- sr_err("Unknown info_id: %d.", info_id);
- return SR_ERR_ARG;
+ case SR_DI_HWCAPS:
+ *data = hwcaps;
+ break;
+ case SR_DI_NUM_PROBES:
+ *data = GINT_TO_POINTER(1);
+ break;
+ case SR_DI_PROBE_NAMES:
+ *data = probe_names;
+ 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) {
- /* TODO */
+ 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 == 14) {
+ devc->num_samples++;
+ /* TODO */
+
+ 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));
+ libusb_free_transfer(transfer);
+ g_free(transfer->buffer);
+ hw_dev_acquisition_stop(sdi, sdi);
+ }
+ } else {
+ /* This was the last transfer we're going to receive, so
+ * clean up now. */
+ libusb_free_transfer(transfer);
+ g_free(transfer->buffer);
+ }
+
+}
+
+static int handle_events(int fd, int revents, void *cb_data)
+{
+ struct dev_context *devc;
+ 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(NULL, &tv, NULL);
+
+ return TRUE;
+}
+
static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
- /* TODO */
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_header header;
+ struct sr_datafeed_meta_analog meta;
+ struct dev_context *devc;
+ 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(NULL);
+ 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(14);
+ 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, 14, 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(const struct sr_dev_inst *sdi,
- void *cb_data)
+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 inactive, can't stop acquisition.");
+ sr_err("Device not active, can't stop acquisition.");
return SR_ERR;
}
- /* TODO */
+ sdi->status = SR_ST_STOPPING;
return SR_OK;
}
SR_PRIV struct sr_dev_driver victor_dmm_driver_info = {
.name = "victor-dmm",
- .longname = "victor-dmm",
+ .longname = "Victor DMMs",
.api_version = 1,
.init = hw_init,
.cleanup = hw_cleanup,
projects / libsigrok.git / commitdiff