hantek-dso: Support conn scan parameter

diff --git a/hardware/hantek-dso/api.c b/hardware/hantek-dso/api.c
index a56feb6f5843fcb22ec9513839b9f75f42538111..604ae1066440e450e74a96a5b29c1673082d4fc2 100644 (file)
--- a/hardware/hantek-dso/api.c
+++ b/hardware/hantek-dso/api.c
@@ -256,16 +256,17 @@ static int hw_init(struct sr_context *sr_ctx)
 
 static GSList *hw_scan(GSList *options)
 {
-       struct sr_dev_inst *sdi;
-       const struct dso_profile *prof;
        struct drv_context *drvc;
        struct dev_context *devc;
-       GSList *devices;
+       struct sr_dev_inst *sdi;
+    struct sr_usb_dev_inst *usb;
+    struct sr_config *src;
+       const struct dso_profile *prof;
+       GSList *l, *devices, *conn_devices;
        struct libusb_device_descriptor des;
        libusb_device **devlist;
        int devcnt, ret, i, j;
-
-       (void)options;
+    const char *conn;
 
        drvc = di->priv;
        drvc->instances = NULL;
@@ -275,9 +276,36 @@ static GSList *hw_scan(GSList *options)
 
        clear_instances();
 
+       conn = NULL;
+       for (l = options; l; l = l->next) {
+               src = l->data;
+               if (src->key == SR_CONF_CONN) {
+                       conn = g_variant_get_string(src->data, NULL);
+                       break;
+               }
+       }
+       if (conn)
+               conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
+       else
+               conn_devices = NULL;
+
        /* Find all Hantek DSO devices and upload firmware to all of them. */
        libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
        for (i = 0; devlist[i]; i++) {
+        if (conn) {
+                       usb = NULL;
+                       for (l = conn_devices; l; l = l->next) {
+                               usb = l->data;
+                               if (usb->bus == libusb_get_bus_number(devlist[i])
+                                       && usb->address == libusb_get_device_address(devlist[i]))
+                                       break;
+                       }
+                       if (!l)
+                               /* This device matched none of the ones that
+                                * matched the conn specification. */
+                               continue;
+        }
+
                if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
                        sr_err("Failed to get device descriptor: %s.",
                               libusb_error_name(ret));