X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fscpi%2Fscpi_usbtmc_libusb.c;h=9f49dd1d2ea8ec2e8f2fd7446b4df1852eb232c0;hb=eb8e6cd2cbcb9c552418dcd0b7973b38b88c805f;hp=9042ef4fd22925c30813900da774d14f4a33234e;hpb=de285cce11aca3afd0d4adfdd514c691e6a71c64;p=libsigrok.git

diff --git a/src/scpi/scpi_usbtmc_libusb.c b/src/scpi/scpi_usbtmc_libusb.c
index 9042ef4f..9f49dd1d 100644
--- a/src/scpi/scpi_usbtmc_libusb.c
+++ b/src/scpi/scpi_usbtmc_libusb.c
@@ -101,9 +101,11 @@ struct usbtmc_blacklist {
 	uint16_t pid;
 };
 
+/* Devices that publish RL1 support, but don't support it. */
 static struct usbtmc_blacklist blacklist_remote[] = {
-	/* Rigol DS1000 series publishes RL1 support, but doesn't support it. */
-	{ 0x1ab1, 0x0588 },
+	{ 0x1ab1, 0x0588 },  /* Rigol DS1000 series */
+	{ 0x1ab1, 0x04b0 },  /* Rigol DS2000 series */
+	{ 0x0957, 0x0588 },  /* Agilent DSO1000 series (rebadged Rigol DS1000) */
 	ALL_ZERO
 };
 
@@ -297,7 +299,7 @@ static int scpi_usbtmc_libusb_open(struct sr_scpi_dev_inst *scpi)
 	struct libusb_config_descriptor *confdes;
 	const struct libusb_interface_descriptor *intfdes;
 	const struct libusb_endpoint_descriptor *ep;
-	int confidx, intfidx, epidx, config = 0;
+	int confidx, intfidx, epidx, config = 0, current_config;
 	uint8_t capabilities[24];
 	int ret, found = 0;
 
@@ -365,10 +367,13 @@ static int scpi_usbtmc_libusb_open(struct sr_scpi_dev_inst *scpi)
 		uscpi->detached_kernel_driver = 1;
 	}
 
-	if ((ret = libusb_set_configuration(usb->devhdl, config)) < 0) {
-		sr_err("Failed to set configuration: %s.",
-		       libusb_error_name(ret));
-		return SR_ERR;
+	if (libusb_get_configuration(usb->devhdl, &current_config) == 0
+	    && current_config != config) {
+		if ((ret = libusb_set_configuration(usb->devhdl, config)) < 0) {
+			sr_err("Failed to set configuration: %s.",
+			       libusb_error_name(ret));
+			return SR_ERR;
+		}
 	}
 
 	if ((ret = libusb_claim_interface(usb->devhdl, uscpi->interface)) < 0) {
@@ -617,26 +622,11 @@ static int scpi_usbtmc_libusb_close(struct sr_scpi_dev_inst *scpi)
 {
 	struct scpi_usbtmc_libusb *uscpi = scpi->priv;
 	struct sr_usb_dev_inst *usb = uscpi->usb;
-	struct libusb_device *dev;
-	struct libusb_device_descriptor des;
 	int ret;
 
 	if (!usb->devhdl)
 		return SR_ERR;
 
-	dev = libusb_get_device(usb->devhdl);
-	libusb_get_device_descriptor(dev, &des);
-	if (des.idVendor == 0x1ab1 && des.idProduct == 0x0588
-			&& scpi->firmware_version >= 24) {
-		/* Rigol DS1000 with firmware > 0.2.4 needs this. */
-		if ((ret = libusb_clear_halt(usb->devhdl, uscpi->bulk_in_ep)) < 0)
-			sr_err("Failed to clear halt/stall condition for EP %d: %s.",
-			       uscpi->bulk_out_ep, libusb_error_name(ret));
-		if ((ret = libusb_clear_halt(usb->devhdl, uscpi->bulk_out_ep)) < 0)
-			sr_err("Failed to clear halt/stall condition for EP %d: %s.",
-			       uscpi->bulk_out_ep, libusb_error_name(ret));
-	}
-
 	scpi_usbtmc_local(uscpi);
 
 	if ((ret = libusb_release_interface(usb->devhdl, uscpi->interface)) < 0)