*/
#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 int32_t hwcaps[] = {
+ SR_CONF_MULTIMETER,
+ SR_CONF_LIMIT_MSEC,
+ SR_CONF_LIMIT_SAMPLES,
+ SR_CONF_CONTINUOUS,
+};
/* 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);
}
return SR_OK;
}
-static int hw_init(void)
+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;
- }
-
- /* TODO */
-
- di->priv = drvc;
-
- return SR_OK;
+ return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
}
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;
- devices = NULL;
drvc = di->priv;
- drvc->instances = NULL;
- /* TODO */
+ /* 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;
-
- drvc = di->priv;
-
- return drvc->instances;
+ return ((struct drv_context *)(di->priv))->instances;
}
static int hw_dev_open(struct sr_dev_inst *sdi)
{
- /* TODO */
+ 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)
{
- /* TODO */
+ struct dev_context *devc;
- return SR_OK;
-}
+ if (!di->priv) {
+ sr_err("Driver was not initialized.");
+ return SR_ERR;
+ }
-static int hw_cleanup(void)
-{
- clear_instances();
+ devc = sdi->priv;
+ if (!devc->usb->devhdl)
+ /* Nothing to do. */
+ return SR_OK;
- /* TODO */
+ 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_info_get(int info_id, const void **data,
- const struct sr_dev_inst *sdi)
+static int hw_cleanup(void)
{
- switch (info_id) {
- /* TODO */
- default:
- sr_err("Unknown info_id: %d.", info_id);
- return SR_ERR_ARG;
- }
+ 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_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
- const void *value)
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
+ 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 */
+ switch (id) {
+ case SR_CONF_LIMIT_MSEC:
+ devc->limit_msec = g_variant_get_uint64(data);
+ 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_CONF_LIMIT_SAMPLES:
+ devc->limit_samples = g_variant_get_uint64(data);
+ sr_dbg("Setting sample limit to %" PRIu64 ".",
+ devc->limit_samples);
+ break;
default:
- sr_err("Unknown hardware capability: %d.", hwcap);
+ sr_err("Unknown hardware capability: %d.", id);
ret = SR_ERR_ARG;
}
return ret;
}
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
+{
+
+ (void)sdi;
+
+ switch (key) {
+ case SR_CONF_DEVICE_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
+ break;
+ default:
+ return SR_ERR_ARG;
+ }
+
+ return SR_OK;
+}
+
+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)
{
- /* TODO */
+ 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;
+ }
+
+ devc = sdi->priv;
+ devc->cb_data = cb_data;
+
+ /* Send header packet to the session bus. */
+ std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
+
+ 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(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,
.scan = hw_scan,
.dev_list = hw_dev_list,
.dev_clear = clear_instances,
+ .config_get = NULL,
+ .config_set = config_set,
+ .config_list = config_list,
.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,