1 // SPDX-License-Identifier: GPL-2.0+
6  *   Copyright (C) 2001 Utz-Uwe Haus <[email protected]>
10  * It was written out of frustration with the PalmConnect USB Serial adapter
15  * It seems that KLSI bought some silicon-design information from ScanLogic,
21  * on the protocol used (or find errors in my reverse-engineered stuff), please
25  * are adventurous, try it with any KLSI-based device and let me know how it
44 #include <linux/usb/serial.h>
47 #define DRIVER_AUTHOR "Utz-Uwe Haus <[email protected]>, Johan Hovold <[email protected]>"
48 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
127 	rc = usb_control_msg_send(port->serial->dev,  in klsi_105_chg_port_settings()
139 		dev_err(&port->dev,  in klsi_105_chg_port_settings()
142 	dev_dbg(&port->dev,  in klsi_105_chg_port_settings()
144 		settings->pktlen, settings->baudrate, settings->databits,  in klsi_105_chg_port_settings()
145 		settings->unknown1, settings->unknown2);  in klsi_105_chg_port_settings()
152  * the state pointer.
155 				   unsigned long *state)  in klsi_105_get_line_state()  argument
160 	rc = usb_control_msg_recv(port->serial->dev, 0,  in klsi_105_get_line_state()
169 		dev_err(&port->dev, "reading line status failed: %d\n", rc);  in klsi_105_get_line_state()
175 	dev_dbg(&port->dev, "read status %04x\n", status);  in klsi_105_get_line_state()
177 	*state = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) |  in klsi_105_get_line_state()
194 		return -ENOMEM;  in klsi_105_port_probe()
197 	priv->cfg.pktlen    = 5;  in klsi_105_port_probe()
198 	priv->cfg.baudrate  = kl5kusb105a_sio_b9600;  in klsi_105_port_probe()
199 	priv->cfg.databits  = kl5kusb105a_dtb_8;  in klsi_105_port_probe()
200 	priv->cfg.unknown1  = 0;  in klsi_105_port_probe()
201 	priv->cfg.unknown2  = 1;  in klsi_105_port_probe()
203 	priv->line_state    = 0;  in klsi_105_port_probe()
205 	spin_lock_init(&priv->lock);  in klsi_105_port_probe()
234 	 * priv->line_state.  in klsi_105_open()
244 	spin_lock_irqsave(&priv->lock, flags);  in klsi_105_open()
245 	priv->cfg.pktlen   = cfg.pktlen;  in klsi_105_open()
246 	priv->cfg.baudrate = cfg.baudrate;  in klsi_105_open()
247 	priv->cfg.databits = cfg.databits;  in klsi_105_open()
248 	priv->cfg.unknown1 = cfg.unknown1;  in klsi_105_open()
249 	priv->cfg.unknown2 = cfg.unknown2;  in klsi_105_open()
250 	spin_unlock_irqrestore(&priv->lock, flags);  in klsi_105_open()
257 	rc = usb_control_msg(port->serial->dev,  in klsi_105_open()
258 			     usb_sndctrlpipe(port->serial->dev, 0),  in klsi_105_open()
267 		dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);  in klsi_105_open()
271 		dev_dbg(&port->dev, "%s - enabled reading\n", __func__);  in klsi_105_open()
279 	spin_lock_irqsave(&priv->lock, flags);  in klsi_105_open()
280 	priv->line_state = line_state;  in klsi_105_open()
281 	spin_unlock_irqrestore(&priv->lock, flags);  in klsi_105_open()
282 	dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__,  in klsi_105_open()
288 	usb_control_msg(port->serial->dev,  in klsi_105_open()
289 			     usb_sndctrlpipe(port->serial->dev, 0),  in klsi_105_open()
307 	rc = usb_control_msg(port->serial->dev,  in klsi_105_close()
308 			     usb_sndctrlpipe(port->serial->dev, 0),  in klsi_105_close()
316 		dev_err(&port->dev, "failed to disable read: %d\n", rc);  in klsi_105_close()
322 /* We need to write a complete 64-byte data block and encode the
323  * number actually sent in the first double-byte, LSB-order. That
333 	count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size,  in klsi_105_prepare_write_buffer()
334 								&port->lock);  in klsi_105_prepare_write_buffer()
340 /* The data received is preceded by a length double-byte in LSB-first order.
344 	struct usb_serial_port *port = urb->context;  in klsi_105_process_read_urb()
345 	unsigned char *data = urb->transfer_buffer;  in klsi_105_process_read_urb()
349 	if (!urb->actual_length)  in klsi_105_process_read_urb()
352 	if (urb->actual_length <= KLSI_HDR_LEN) {  in klsi_105_process_read_urb()
353 		dev_dbg(&port->dev, "%s - malformed packet\n", __func__);  in klsi_105_process_read_urb()
358 	if (len > urb->actual_length - KLSI_HDR_LEN) {  in klsi_105_process_read_urb()
359 		dev_dbg(&port->dev, "%s - packet length mismatch\n", __func__);  in klsi_105_process_read_urb()
360 		len = urb->actual_length - KLSI_HDR_LEN;  in klsi_105_process_read_urb()
363 	tty_insert_flip_string(&port->port, data + KLSI_HDR_LEN, len);  in klsi_105_process_read_urb()
364 	tty_flip_buffer_push(&port->port);  in klsi_105_process_read_urb()
372 	struct device *dev = &port->dev;  in klsi_105_set_termios()
373 	unsigned int iflag = tty->termios.c_iflag;  in klsi_105_set_termios()
374 	unsigned int old_iflag = old_termios->c_iflag;  in klsi_105_set_termios()
375 	unsigned int cflag = tty->termios.c_cflag;  in klsi_105_set_termios()
376 	unsigned int old_cflag = old_termios->c_cflag;  in klsi_105_set_termios()
386 	spin_lock_irqsave(&priv->lock, flags);  in klsi_105_set_termios()
397 		priv->cfg.baudrate = kl5kusb105a_sio_b1200;  in klsi_105_set_termios()
400 		priv->cfg.baudrate = kl5kusb105a_sio_b2400;  in klsi_105_set_termios()
403 		priv->cfg.baudrate = kl5kusb105a_sio_b4800;  in klsi_105_set_termios()
406 		priv->cfg.baudrate = kl5kusb105a_sio_b9600;  in klsi_105_set_termios()
409 		priv->cfg.baudrate = kl5kusb105a_sio_b19200;  in klsi_105_set_termios()
412 		priv->cfg.baudrate = kl5kusb105a_sio_b38400;  in klsi_105_set_termios()
415 		priv->cfg.baudrate = kl5kusb105a_sio_b57600;  in klsi_105_set_termios()
418 		priv->cfg.baudrate = kl5kusb105a_sio_b115200;  in klsi_105_set_termios()
422 		priv->cfg.baudrate = kl5kusb105a_sio_b9600;  in klsi_105_set_termios()
440 			dev_dbg(dev, "%s - 5 bits/byte not supported\n", __func__);  in klsi_105_set_termios()
441 			spin_unlock_irqrestore(&priv->lock, flags);  in klsi_105_set_termios()
444 			dev_dbg(dev, "%s - 6 bits/byte not supported\n", __func__);  in klsi_105_set_termios()
445 			spin_unlock_irqrestore(&priv->lock, flags);  in klsi_105_set_termios()
448 			priv->cfg.databits = kl5kusb105a_dtb_7;  in klsi_105_set_termios()
451 			priv->cfg.databits = kl5kusb105a_dtb_8;  in klsi_105_set_termios()
454 			dev_err(dev, "CSIZE was not CS5-CS8, using default of 8\n");  in klsi_105_set_termios()
455 			priv->cfg.databits = kl5kusb105a_dtb_8;  in klsi_105_set_termios()
466 		tty->termios.c_cflag &= ~(PARENB|PARODD|CSTOPB);  in klsi_105_set_termios()
476 		tty->termios.c_cflag &= ~CRTSCTS;  in klsi_105_set_termios()
478 	memcpy(cfg, &priv->cfg, sizeof(*cfg));  in klsi_105_set_termios()
479 	spin_unlock_irqrestore(&priv->lock, flags);  in klsi_105_set_termios()
489 	struct usb_serial_port *port = tty->driver_data;  in klsi_105_tiocmget()
497 		dev_err(&port->dev,  in klsi_105_tiocmget()
503 	spin_lock_irqsave(&priv->lock, flags);  in klsi_105_tiocmget()
504 	priv->line_state = line_state;  in klsi_105_tiocmget()
505 	spin_unlock_irqrestore(&priv->lock, flags);  in klsi_105_tiocmget()
506 	dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__, line_state);  in klsi_105_tiocmget()