1 // SPDX-License-Identifier: GPL-2.0+
5  *	Copyright (C) 2001-2002	Greg Kroah-Hartman (greg@kroah.com)
12  * please use the usb-irda driver, as it contains the proper error checking and
15  * Portions of this driver were taken from drivers/net/irda/irda-usb.c, which
19  * See Documentation/usb/usb-serial.rst for more information on using this
37 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Johan Hovold <jhovold@gmail.com>"
45 static int xbof = -1;
63 	{ USB_DEVICE(0x050f, 0x0180) },		/* KC Technology, KC-180 */
65 	{ USB_DEVICE(0x09c4, 0x0011) },		/* ACTiSys ACT-IR2000U */
75 		.name	= "ir-usb",
97 	struct device *dev = &serial->dev->dev;  in irda_usb_dump_class_desc()
99 	dev_dbg(dev, "bLength=%x\n", desc->bLength);  in irda_usb_dump_class_desc()
100 	dev_dbg(dev, "bDescriptorType=%x\n", desc->bDescriptorType);  in irda_usb_dump_class_desc()
101 	dev_dbg(dev, "bcdSpecRevision=%x\n", __le16_to_cpu(desc->bcdSpecRevision));  in irda_usb_dump_class_desc()
102 	dev_dbg(dev, "bmDataSize=%x\n", desc->bmDataSize);  in irda_usb_dump_class_desc()
103 	dev_dbg(dev, "bmWindowSize=%x\n", desc->bmWindowSize);  in irda_usb_dump_class_desc()
104 	dev_dbg(dev, "bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);  in irda_usb_dump_class_desc()
105 	dev_dbg(dev, "wBaudRate=%x\n", __le16_to_cpu(desc->wBaudRate));  in irda_usb_dump_class_desc()
106 	dev_dbg(dev, "bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);  in irda_usb_dump_class_desc()
107 	dev_dbg(dev, "bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);  in irda_usb_dump_class_desc()
108 	dev_dbg(dev, "bMaxUnicastList=%x\n", desc->bMaxUnicastList);  in irda_usb_dump_class_desc()
111 /*------------------------------------------------------------------*/
121  * Based on the same function in drivers/net/irda/irda-usb.c
126 	struct usb_device *dev = serial->dev;  in irda_usb_find_class_desc()
139 	dev_dbg(&serial->dev->dev, "%s -  ret=%d\n", __func__, ret);  in irda_usb_find_class_desc()
141 		dev_dbg(&serial->dev->dev,  in irda_usb_find_class_desc()
142 			"%s - class descriptor read %s (%d)\n", __func__,  in irda_usb_find_class_desc()
146 	if (desc->bDescriptorType != USB_DT_CS_IRDA) {  in irda_usb_find_class_desc()
147 		dev_dbg(&serial->dev->dev, "%s - bad class descriptor type\n",  in irda_usb_find_class_desc()
164 	/* reference irda-usb.c */  in ir_xbof_change()
201 	int rates;  in ir_startup()  local
205 		dev_err(&serial->dev->dev,  in ir_startup()
207 		return -ENODEV;  in ir_startup()
210 	rates = le16_to_cpu(irda_desc->wBaudRate);  in ir_startup()
212 	dev_dbg(&serial->dev->dev,  in ir_startup()
213 		"%s - Baud rates supported:%s%s%s%s%s%s%s%s%s\n",  in ir_startup()
215 		(rates & USB_IRDA_BR_2400) ? " 2400" : "",  in ir_startup()
216 		(rates & USB_IRDA_BR_9600) ? " 9600" : "",  in ir_startup()
217 		(rates & USB_IRDA_BR_19200) ? " 19200" : "",  in ir_startup()
218 		(rates & USB_IRDA_BR_38400) ? " 38400" : "",  in ir_startup()
219 		(rates & USB_IRDA_BR_57600) ? " 57600" : "",  in ir_startup()
220 		(rates & USB_IRDA_BR_115200) ? " 115200" : "",  in ir_startup()
221 		(rates & USB_IRDA_BR_576000) ? " 576000" : "",  in ir_startup()
222 		(rates & USB_IRDA_BR_1152000) ? " 1152000" : "",  in ir_startup()
223 		(rates & USB_IRDA_BR_4000000) ? " 4000000" : "");  in ir_startup()
225 	switch (irda_desc->bmAdditionalBOFs) {  in ir_startup()
266 	if (port->bulk_out_size == 0)  in ir_write()
267 		return -EINVAL;  in ir_write()
272 	count = min(count, port->bulk_out_size - 1);  in ir_write()
274 	spin_lock_irqsave(&port->lock, flags);  in ir_write()
275 	if (__test_and_clear_bit(0, &port->write_urbs_free)) {  in ir_write()
276 		urb = port->write_urbs[0];  in ir_write()
277 		port->tx_bytes += count;  in ir_write()
279 	spin_unlock_irqrestore(&port->lock, flags);  in ir_write()
291 	*(u8 *)urb->transfer_buffer = ir_xbof | ir_baud;  in ir_write()
293 	memcpy(urb->transfer_buffer + 1, buf, count);  in ir_write()
295 	urb->transfer_buffer_length = count + 1;  in ir_write()
296 	urb->transfer_flags = URB_ZERO_PACKET;  in ir_write()
300 		dev_err(&port->dev, "failed to submit write urb: %d\n", ret);  in ir_write()
302 		spin_lock_irqsave(&port->lock, flags);  in ir_write()
303 		__set_bit(0, &port->write_urbs_free);  in ir_write()
304 		port->tx_bytes -= count;  in ir_write()
305 		spin_unlock_irqrestore(&port->lock, flags);  in ir_write()
315 	struct usb_serial_port *port = urb->context;  in ir_write_bulk_callback()
316 	int status = urb->status;  in ir_write_bulk_callback()
319 	spin_lock_irqsave(&port->lock, flags);  in ir_write_bulk_callback()
320 	__set_bit(0, &port->write_urbs_free);  in ir_write_bulk_callback()
321 	port->tx_bytes -= urb->transfer_buffer_length - 1;  in ir_write_bulk_callback()
322 	spin_unlock_irqrestore(&port->lock, flags);  in ir_write_bulk_callback()
327 	case -ENOENT:  in ir_write_bulk_callback()
328 	case -ECONNRESET:  in ir_write_bulk_callback()
329 	case -ESHUTDOWN:  in ir_write_bulk_callback()
330 		dev_dbg(&port->dev, "write urb stopped: %d\n", status);  in ir_write_bulk_callback()
332 	case -EPIPE:  in ir_write_bulk_callback()
333 		dev_err(&port->dev, "write urb stopped: %d\n", status);  in ir_write_bulk_callback()
336 		dev_err(&port->dev, "nonzero write-urb status: %d\n", status);  in ir_write_bulk_callback()
345 	struct usb_serial_port *port = tty->driver_data;  in ir_write_room()
348 	if (port->bulk_out_size == 0)  in ir_write_room()
351 	if (test_bit(0, &port->write_urbs_free))  in ir_write_room()
352 		count = port->bulk_out_size - 1;  in ir_write_room()
359 	struct usb_serial_port *port = urb->context;  in ir_process_read_urb()
360 	unsigned char *data = urb->transfer_buffer;  in ir_process_read_urb()  local
362 	if (!urb->actual_length)  in ir_process_read_urb()
369 	if (*data & 0x0f)  in ir_process_read_urb()
370 		ir_baud = *data & 0x0f;  in ir_process_read_urb()
372 	if (urb->actual_length == 1)  in ir_process_read_urb()
375 	tty_insert_flip_string(&port->port, data + 1, urb->actual_length - 1);  in ir_process_read_urb()
376 	tty_flip_buffer_push(&port->port);  in ir_process_read_urb()
383 	struct usb_device *udev = port->serial->dev;  in ir_set_termios()
431 	if (xbof == -1)  in ir_set_termios()
437 	tty_termios_copy_hw(&tty->termios, old_termios);  in ir_set_termios()
441 	 * send the baud change out on an "empty" data packet  in ir_set_termios()
450 			usb_sndbulkpipe(udev, port->bulk_out_endpointAddress),  in ir_set_termios()
454 			ret = -EIO;  in ir_set_termios()
455 		dev_err(&port->dev, "failed to change line speed: %d\n", ret);  in ir_set_termios()