sr: add new driver API call: scan()

[libsigrok.git] / hardware / hantek-dso / api.c

diff --git a/hardware/hantek-dso/api.c b/hardware/hantek-dso/api.c
index dc8dbef87b8823eab3886e0daab6155734d67a6d..40303fee1c2e9d643a82bc465800af5357b6f1d5 100644 (file)
--- a/hardware/hantek-dso/api.c
+++ b/hardware/hantek-dso/api.c
@@ -201,25 +201,31 @@ static int configure_probes(struct context *ctx, const GSList *probes)
 }
 
 static int hw_init(void)
+{
+
+       if (libusb_init(&usb_context) != 0) {
+               sr_err("hantek-dso: Failed to initialize USB.");
+               return SR_ERR;
+       }
+
+       return SR_OK;
+}
+
+static int hw_scan(void)
 {
        struct sr_dev_inst *sdi;
        struct libusb_device_descriptor des;
        const struct dso_profile *prof;
        struct context *ctx;
        libusb_device **devlist;
-       int err, devcnt, i, j;
-
-       if (libusb_init(&usb_context) != 0) {
-               sr_err("hantek-dso: Failed to initialize USB.");
-               return 0;
-       }
+       int devcnt, ret, i, j;
 
        /* Find all Hantek DSO devices and upload firmware to all of them. */
        devcnt = 0;
        libusb_get_device_list(usb_context, &devlist);
        for (i = 0; devlist[i]; i++) {
-               if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
-                       sr_err("hantek-dso: failed to get device descriptor: %d", err);
+               if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
+                       sr_err("hantek-dso: failed to get device descriptor: %d", ret);
                        continue;
                }
 
@@ -856,6 +862,7 @@ SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
        .api_version = 1,
        .init = hw_init,
        .cleanup = hw_cleanup,
+       .scan = hw_scan,
        .dev_open = hw_dev_open,
        .dev_close = hw_dev_close,
        .dev_info_get = hw_dev_info_get,