1 // SPDX-License-Identifier: GPL-2.0
3  * Generic USB GNSS receiver driver
9 #include <linux/gnss.h>
35 	struct gnss_usb *gusb = urb->context;  in gnss_usb_rx_complete()
36 	struct gnss_device *gdev = gusb->gdev;  in gnss_usb_rx_complete()
37 	int status = urb->status;  in gnss_usb_rx_complete()
44 	case -ENOENT:  in gnss_usb_rx_complete()
45 	case -ECONNRESET:  in gnss_usb_rx_complete()
46 	case -ESHUTDOWN:  in gnss_usb_rx_complete()
47 		dev_dbg(&gdev->dev, "urb stopped: %d\n", status);  in gnss_usb_rx_complete()
49 	case -EPIPE:  in gnss_usb_rx_complete()
50 		dev_err(&gdev->dev, "urb stopped: %d\n", status);  in gnss_usb_rx_complete()
53 		dev_dbg(&gdev->dev, "nonzero urb status: %d\n", status);  in gnss_usb_rx_complete()
57 	len = urb->actual_length;  in gnss_usb_rx_complete()
61 	ret = gnss_insert_raw(gdev, urb->transfer_buffer, len);  in gnss_usb_rx_complete()
63 		dev_dbg(&gdev->dev, "dropped %d bytes\n", len - ret);  in gnss_usb_rx_complete()
66 	if (ret && ret != -EPERM && ret != -ENODEV)  in gnss_usb_rx_complete()
67 		dev_err(&gdev->dev, "failed to resubmit urb: %d\n", ret);  in gnss_usb_rx_complete()
75 	ret = usb_submit_urb(gusb->read_urb, GFP_KERNEL);  in gnss_usb_open()
77 		if (ret != -EPERM && ret != -ENODEV)  in gnss_usb_open()
78 			dev_err(&gdev->dev, "failed to submit urb: %d\n", ret);  in gnss_usb_open()
89 	usb_kill_urb(gusb->read_urb);  in gnss_usb_close()
101 		return -ENOMEM;  in gnss_usb_write_raw()
103 	ret = usb_bulk_msg(gusb->udev, gusb->write_pipe, tbuf, count, NULL,  in gnss_usb_write_raw()
129 	ret = usb_find_common_endpoints(intf->cur_altsetting, &in, &out, NULL,  in gnss_usb_probe()
136 		return -ENOMEM;  in gnss_usb_probe()
138 	gdev = gnss_allocate_device(&intf->dev);  in gnss_usb_probe()
140 		ret = -ENOMEM;  in gnss_usb_probe()
144 	gdev->ops = &gnss_usb_gnss_ops;  in gnss_usb_probe()
145 	gdev->type = GNSS_TYPE_NMEA;  in gnss_usb_probe()
150 		ret = -ENOMEM;  in gnss_usb_probe()
158 		ret = -ENOMEM;  in gnss_usb_probe()
166 	gusb->intf = intf;  in gnss_usb_probe()
167 	gusb->udev = udev;  in gnss_usb_probe()
168 	gusb->gdev = gdev;  in gnss_usb_probe()
169 	gusb->read_urb = urb;  in gnss_usb_probe()
170 	gusb->write_pipe = usb_sndbulkpipe(udev, usb_endpoint_num(out));  in gnss_usb_probe()
196 	gnss_deregister_device(gusb->gdev);  in gnss_usb_disconnect()
198 	kfree(gusb->read_urb->transfer_buffer);  in gnss_usb_disconnect()
199 	usb_free_urb(gusb->read_urb);  in gnss_usb_disconnect()
200 	gnss_put_device(gusb->gdev);  in gnss_usb_disconnect()
205 	.name		= "gnss-usb",
213 MODULE_DESCRIPTION("Generic USB GNSS receiver driver");