X-Git-Url: https://git.ao2.it/libam7xxx.git/blobdiff_plain/d9891d12a7163c70946d2cf8cb6d05e841d53b97..9929ba27d2c28ef364ecdd7b27120f0fe7000a8c:/examples/am7xxx-modeswitch.c

diff --git a/examples/am7xxx-modeswitch.c b/examples/am7xxx-modeswitch.c
new file mode 100644
index 0000000..9942d81
--- /dev/null
+++ b/examples/am7xxx-modeswitch.c
@@ -0,0 +1,97 @@
+/* am7xxx-modeswitch - a simple usb-modeswitch for am7xxx devices
+ *
+ * Copyright (C) 2012  Antonio Ospite <ospite@studenti.unina.it>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <libusb.h>
+
+#define AM7XXX_STORAGE_VID           0x1de1
+#define AM7XXX_STORAGE_PID           0x1101
+#define AM7XXX_STORAGE_CONFIGURATION 1
+#define AM7XXX_STORAGE_INTERFACE     0
+#define AM7XXX_STORAGE_OUT_EP        0x01
+
+static unsigned char switch_command[] =
+	"\x55\x53\x42\x43\x08\x70\x52\x89\x00\x00\x00\x00\x00\x00"
+	"\x0c\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
+
+int main(void)
+{
+	int ret;
+	int transferred;
+	libusb_device_handle *usb_device = NULL;
+
+	unsigned int len;
+
+	ret = libusb_init(NULL);
+	if (ret < 0)
+		goto out;
+
+	libusb_set_debug(NULL, 3);
+
+	usb_device = libusb_open_device_with_vid_pid(NULL,
+						     AM7XXX_STORAGE_VID,
+						     AM7XXX_STORAGE_PID);
+	if (usb_device == NULL) {
+		fprintf(stderr, "cannot open the device: %d.\n", errno);
+		ret = -errno;
+		goto out;
+	}
+
+	if (libusb_kernel_driver_active(usb_device, AM7XXX_STORAGE_INTERFACE)) {
+		ret = libusb_detach_kernel_driver(usb_device,
+						  AM7XXX_STORAGE_INTERFACE);
+		if (ret < 0)
+			fprintf(stderr, "Warning: cannot detach kernel driver.\n");
+	} else {
+		fprintf(stderr, "kernel driver not active.\n");
+	}
+
+	ret = libusb_set_configuration(usb_device, AM7XXX_STORAGE_CONFIGURATION);
+	if (ret < 0) {
+		fprintf(stderr, "cannot set configuration.\n");
+		goto out_libusb_close;
+	}
+
+	ret = libusb_claim_interface(usb_device, AM7XXX_STORAGE_INTERFACE);
+	if (ret < 0) {
+		fprintf(stderr, "cannot claim interface.\n");
+		goto out_libusb_close;
+	}
+
+	len = sizeof(switch_command);
+	transferred = 0;
+	ret = libusb_bulk_transfer(usb_device, AM7XXX_STORAGE_OUT_EP,
+				   switch_command, len, &transferred, 0);
+	if (ret != 0 || (unsigned int)transferred != len) {
+		fprintf(stderr, "ret: %d\ttransferred: %d (expected %u)\n",
+		      ret, transferred, len);
+		goto out_libusb_release_interface;
+	}
+
+	fprintf(stderr, "OK, command sent!\n");
+
+out_libusb_release_interface:
+	libusb_release_interface(usb_device, AM7XXX_STORAGE_INTERFACE);
+out_libusb_close:
+	libusb_close(usb_device);
+	usb_device = NULL;
+out:
+	libusb_exit(NULL);
+	return ret;
+}