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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Belkin USB Serial Adapter Driver
3 *
4 * Copyright (C) 2000 William Greathouse (wgreathouse@smva.com)
Ben Minerds70f3c752012-04-28 13:36:35 +10005 * Copyright (C) 2000-2001 Greg Kroah-Hartman (greg@kroah.com)
Johan Hovold2afd82872010-05-15 17:53:53 +02006 * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * This program is largely derived from work by the linux-usb group
9 * and associated source files. Please see the usb/serial files for
10 * individual credits and copyrights.
Alan Coxb69c1492008-07-22 11:09:39 +010011 *
Ben Minerds70f3c752012-04-28 13:36:35 +100012 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 *
Alan Coxb69c1492008-07-22 11:09:39 +010017 * See Documentation/usb/usb-serial.txt for more information on using this
18 * driver
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 *
20 * TODO:
21 * -- Add true modem contol line query capability. Currently we track the
22 * states reported by the interrupt and the states we request.
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 * -- Add support for flush commands
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/kernel.h>
27#include <linux/errno.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/tty.h>
31#include <linux/tty_driver.h>
32#include <linux/tty_flip.h>
33#include <linux/module.h>
34#include <linux/spinlock.h>
Alan Coxb69c1492008-07-22 11:09:39 +010035#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/usb.h>
Greg Kroah-Hartmana9698882006-07-11 21:22:58 -070037#include <linux/usb/serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "belkin_sa.h"
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define DRIVER_AUTHOR "William Greathouse <wgreathouse@smva.com>"
41#define DRIVER_DESC "USB Belkin Serial converter driver"
42
43/* function prototypes for a Belkin USB Serial Adapter F5U103 */
Johan Hovoldfa919752012-10-15 18:20:53 +020044static int belkin_sa_port_probe(struct usb_serial_port *port);
45static int belkin_sa_port_remove(struct usb_serial_port *port);
Alan Coxb69c1492008-07-22 11:09:39 +010046static int belkin_sa_open(struct tty_struct *tty,
Alan Coxa509a7e2009-09-19 13:13:26 -070047 struct usb_serial_port *port);
Alan Cox335f8512009-06-11 12:26:29 +010048static void belkin_sa_close(struct usb_serial_port *port);
Alan Coxb69c1492008-07-22 11:09:39 +010049static void belkin_sa_read_int_callback(struct urb *urb);
Johan Hovold2afd82872010-05-15 17:53:53 +020050static void belkin_sa_process_read_urb(struct urb *urb);
Alan Coxb69c1492008-07-22 11:09:39 +010051static void belkin_sa_set_termios(struct tty_struct *tty,
52 struct usb_serial_port *port, struct ktermios * old);
53static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state);
Alan Cox60b33c12011-02-14 16:26:14 +000054static int belkin_sa_tiocmget(struct tty_struct *tty);
Alan Cox20b9d172011-02-14 16:26:50 +000055static int belkin_sa_tiocmset(struct tty_struct *tty,
Alan Coxb69c1492008-07-22 11:09:39 +010056 unsigned int set, unsigned int clear);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -070059static const struct usb_device_id id_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 { USB_DEVICE(BELKIN_SA_VID, BELKIN_SA_PID) },
61 { USB_DEVICE(BELKIN_OLD_VID, BELKIN_OLD_PID) },
62 { USB_DEVICE(PERACOM_VID, PERACOM_PID) },
63 { USB_DEVICE(GOHUBS_VID, GOHUBS_PID) },
64 { USB_DEVICE(GOHUBS_VID, HANDYLINK_PID) },
65 { USB_DEVICE(BELKIN_DOCKSTATION_VID, BELKIN_DOCKSTATION_PID) },
Alan Coxb69c1492008-07-22 11:09:39 +010066 { } /* Terminating entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067};
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -070068MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70/* All of the device info needed for the serial converters */
Greg Kroah-Hartmanea653702005-06-20 21:15:16 -070071static struct usb_serial_driver belkin_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -070072 .driver = {
73 .owner = THIS_MODULE,
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -070074 .name = "belkin",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -070075 },
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -070076 .description = "Belkin / Peracom / GoHubs USB Serial Adapter",
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -070077 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 .num_ports = 1,
79 .open = belkin_sa_open,
80 .close = belkin_sa_close,
Alan Coxb69c1492008-07-22 11:09:39 +010081 .read_int_callback = belkin_sa_read_int_callback,
Johan Hovold2afd82872010-05-15 17:53:53 +020082 .process_read_urb = belkin_sa_process_read_urb,
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 .set_termios = belkin_sa_set_termios,
84 .break_ctl = belkin_sa_break_ctl,
85 .tiocmget = belkin_sa_tiocmget,
86 .tiocmset = belkin_sa_tiocmset,
Johan Hovoldfa919752012-10-15 18:20:53 +020087 .port_probe = belkin_sa_port_probe,
88 .port_remove = belkin_sa_port_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -070089};
90
Alan Stern08a4f6b2012-02-23 14:56:17 -050091static struct usb_serial_driver * const serial_drivers[] = {
92 &belkin_device, NULL
93};
94
Linus Torvalds1da177e2005-04-16 15:20:36 -070095struct belkin_sa_private {
96 spinlock_t lock;
97 unsigned long control_state;
98 unsigned char last_lsr;
99 unsigned char last_msr;
100 int bad_flow_control;
101};
102
103
104/*
105 * ***************************************************************************
106 * Belkin USB Serial Adapter F5U103 specific driver functions
107 * ***************************************************************************
108 */
109
110#define WDR_TIMEOUT 5000 /* default urb timeout */
111
112/* assumes that struct usb_serial *serial is available */
Alan Coxb69c1492008-07-22 11:09:39 +0100113#define BSA_USB_CMD(c, v) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 (c), BELKIN_SA_SET_REQUEST_TYPE, \
115 (v), 0, NULL, 0, WDR_TIMEOUT)
116
Johan Hovoldfa919752012-10-15 18:20:53 +0200117static int belkin_sa_port_probe(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
Johan Hovoldfa919752012-10-15 18:20:53 +0200119 struct usb_device *dev = port->serial->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 struct belkin_sa_private *priv;
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 priv = kmalloc(sizeof(struct belkin_sa_private), GFP_KERNEL);
123 if (!priv)
Johan Hovoldfa919752012-10-15 18:20:53 +0200124 return -ENOMEM;
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 spin_lock_init(&priv->lock);
127 priv->control_state = 0;
128 priv->last_lsr = 0;
129 priv->last_msr = 0;
130 /* see comments at top of file */
Alan Coxb69c1492008-07-22 11:09:39 +0100131 priv->bad_flow_control =
132 (le16_to_cpu(dev->descriptor.bcdDevice) <= 0x0206) ? 1 : 0;
Greg Kroah-Hartmanc197a8d2008-08-18 13:21:04 -0700133 dev_info(&dev->dev, "bcdDevice: %04x, bfc: %d\n",
Alan Coxb69c1492008-07-22 11:09:39 +0100134 le16_to_cpu(dev->descriptor.bcdDevice),
135 priv->bad_flow_control);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Johan Hovoldfa919752012-10-15 18:20:53 +0200137 usb_set_serial_port_data(port, priv);
Alan Coxb69c1492008-07-22 11:09:39 +0100138
139 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140}
141
Johan Hovoldfa919752012-10-15 18:20:53 +0200142static int belkin_sa_port_remove(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Johan Hovoldfa919752012-10-15 18:20:53 +0200144 struct belkin_sa_private *priv;
Alan Coxb69c1492008-07-22 11:09:39 +0100145
Johan Hovoldfa919752012-10-15 18:20:53 +0200146 priv = usb_get_serial_port_data(port);
147 kfree(priv);
148
149 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150}
151
Johan Hovold726ef422010-05-15 17:53:51 +0200152static int belkin_sa_open(struct tty_struct *tty,
Alan Coxa509a7e2009-09-19 13:13:26 -0700153 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
Johan Hovoldf2f8b7f2010-05-15 17:53:52 +0200155 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
158 if (retval) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700159 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
Johan Hovoldf2f8b7f2010-05-15 17:53:52 +0200160 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 }
162
Johan Hovoldf2f8b7f2010-05-15 17:53:52 +0200163 retval = usb_serial_generic_open(tty, port);
164 if (retval)
165 usb_kill_urb(port->interrupt_in_urb);
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 return retval;
Johan Hovold726ef422010-05-15 17:53:51 +0200168}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Alan Cox335f8512009-06-11 12:26:29 +0100170static void belkin_sa_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Johan Hovoldf26788d2010-03-17 23:00:45 +0100172 usb_serial_generic_close(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 usb_kill_urb(port->interrupt_in_urb);
Johan Hovold726ef422010-05-15 17:53:51 +0200174}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Alan Cox95da3102008-07-22 11:09:07 +0100176static void belkin_sa_read_int_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
Ming Leicdc97792008-02-24 18:41:47 +0800178 struct usb_serial_port *port = urb->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 struct belkin_sa_private *priv;
180 unsigned char *data = urb->transfer_buffer;
181 int retval;
Greg Kroah-Hartmanf26aad22007-06-15 15:44:13 -0700182 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 unsigned long flags;
184
Greg Kroah-Hartmanf26aad22007-06-15 15:44:13 -0700185 switch (status) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 case 0:
187 /* success */
188 break;
189 case -ECONNRESET:
190 case -ENOENT:
191 case -ESHUTDOWN:
192 /* this urb is terminated, clean up */
Greg Kroah-Hartmanc89aa632012-05-15 16:27:11 -0700193 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
194 __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 return;
196 default:
Greg Kroah-Hartmanc89aa632012-05-15 16:27:11 -0700197 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
198 __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 goto exit;
200 }
201
Greg Kroah-Hartman59d33f22012-09-18 09:58:57 +0100202 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204 /* Handle known interrupt data */
205 /* ignore data[0] and data[1] */
206
207 priv = usb_get_serial_port_data(port);
208 spin_lock_irqsave(&priv->lock, flags);
209 priv->last_msr = data[BELKIN_SA_MSR_INDEX];
Alan Coxb69c1492008-07-22 11:09:39 +0100210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /* Record Control Line states */
212 if (priv->last_msr & BELKIN_SA_MSR_DSR)
213 priv->control_state |= TIOCM_DSR;
214 else
215 priv->control_state &= ~TIOCM_DSR;
216
217 if (priv->last_msr & BELKIN_SA_MSR_CTS)
218 priv->control_state |= TIOCM_CTS;
219 else
220 priv->control_state &= ~TIOCM_CTS;
221
222 if (priv->last_msr & BELKIN_SA_MSR_RI)
223 priv->control_state |= TIOCM_RI;
224 else
225 priv->control_state &= ~TIOCM_RI;
226
227 if (priv->last_msr & BELKIN_SA_MSR_CD)
228 priv->control_state |= TIOCM_CD;
229 else
230 priv->control_state &= ~TIOCM_CD;
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 priv->last_lsr = data[BELKIN_SA_LSR_INDEX];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 spin_unlock_irqrestore(&priv->lock, flags);
234exit:
Alan Coxb69c1492008-07-22 11:09:39 +0100235 retval = usb_submit_urb(urb, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 if (retval)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700237 dev_err(&port->dev, "%s - usb_submit_urb failed with "
238 "result %d\n", __func__, retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Johan Hovold2afd82872010-05-15 17:53:53 +0200241static void belkin_sa_process_read_urb(struct urb *urb)
242{
243 struct usb_serial_port *port = urb->context;
244 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
Johan Hovold2afd82872010-05-15 17:53:53 +0200245 unsigned char *data = urb->transfer_buffer;
246 unsigned long flags;
247 unsigned char status;
248 char tty_flag;
249
250 /* Update line status */
251 tty_flag = TTY_NORMAL;
252
253 spin_lock_irqsave(&priv->lock, flags);
254 status = priv->last_lsr;
255 priv->last_lsr &= ~BELKIN_SA_LSR_ERR;
256 spin_unlock_irqrestore(&priv->lock, flags);
257
258 if (!urb->actual_length)
259 return;
260
Johan Hovold2afd82872010-05-15 17:53:53 +0200261 if (status & BELKIN_SA_LSR_ERR) {
262 /* Break takes precedence over parity, which takes precedence
263 * over framing errors. */
264 if (status & BELKIN_SA_LSR_BI)
265 tty_flag = TTY_BREAK;
266 else if (status & BELKIN_SA_LSR_PE)
267 tty_flag = TTY_PARITY;
268 else if (status & BELKIN_SA_LSR_FE)
269 tty_flag = TTY_FRAME;
270 dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
271
272 /* Overrun is special, not associated with a char. */
273 if (status & BELKIN_SA_LSR_OE)
Jiri Slaby92a19f92013-01-03 15:53:03 +0100274 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
Johan Hovold2afd82872010-05-15 17:53:53 +0200275 }
276
Jiri Slaby2f693352013-01-03 15:53:02 +0100277 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
Johan Hovold2afd82872010-05-15 17:53:53 +0200278 urb->actual_length);
Jiri Slaby2e124b42013-01-03 15:53:06 +0100279 tty_flip_buffer_push(&port->port);
Johan Hovold2afd82872010-05-15 17:53:53 +0200280}
281
Alan Cox95da3102008-07-22 11:09:07 +0100282static void belkin_sa_set_termios(struct tty_struct *tty,
283 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
285 struct usb_serial *serial = port->serial;
286 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
287 unsigned int iflag;
288 unsigned int cflag;
289 unsigned int old_iflag = 0;
290 unsigned int old_cflag = 0;
291 __u16 urb_value = 0; /* Will hold the new flags */
292 unsigned long flags;
293 unsigned long control_state;
294 int bad_flow_control;
Alan Cox9a8baec2007-06-22 14:40:18 +0100295 speed_t baud;
Alan Coxadc8d7462012-07-14 15:31:47 +0100296 struct ktermios *termios = &tty->termios;
Alan Coxb69c1492008-07-22 11:09:39 +0100297
Alan Cox3ec466b2007-12-13 16:15:26 -0800298 iflag = termios->c_iflag;
299 cflag = termios->c_cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Alan Cox3ec466b2007-12-13 16:15:26 -0800301 termios->c_cflag &= ~CMSPAR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
303 /* get a local copy of the current port settings */
304 spin_lock_irqsave(&priv->lock, flags);
305 control_state = priv->control_state;
306 bad_flow_control = priv->bad_flow_control;
307 spin_unlock_irqrestore(&priv->lock, flags);
Alan Coxb69c1492008-07-22 11:09:39 +0100308
Alan Cox9a8baec2007-06-22 14:40:18 +0100309 old_iflag = old_termios->c_iflag;
310 old_cflag = old_termios->c_cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 /* Set the baud rate */
Alan Cox3ec466b2007-12-13 16:15:26 -0800313 if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 /* reassert DTR and (maybe) RTS on transition from B0 */
Alan Coxb69c1492008-07-22 11:09:39 +0100315 if ((old_cflag & CBAUD) == B0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 control_state |= (TIOCM_DTR|TIOCM_RTS);
317 if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 1) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700318 dev_err(&port->dev, "Set DTR error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 /* don't set RTS if using hardware flow control */
Alan Cox3ec466b2007-12-13 16:15:26 -0800320 if (!(old_cflag & CRTSCTS))
Alan Coxb69c1492008-07-22 11:09:39 +0100321 if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST
322 , 1) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700323 dev_err(&port->dev, "Set RTS error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 }
Alan Cox9a8baec2007-06-22 14:40:18 +0100325 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
Alan Cox95da3102008-07-22 11:09:07 +0100327 baud = tty_get_baud_rate(tty);
Alan Cox3ec466b2007-12-13 16:15:26 -0800328 if (baud) {
329 urb_value = BELKIN_SA_BAUD(baud);
330 /* Clip to maximum speed */
331 if (urb_value == 0)
332 urb_value = 1;
333 /* Turn it back into a resulting real baud rate */
334 baud = BELKIN_SA_BAUD(urb_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
Alan Cox3ec466b2007-12-13 16:15:26 -0800336 /* Report the actual baud rate back to the caller */
Alan Cox95da3102008-07-22 11:09:07 +0100337 tty_encode_baud_rate(tty, baud, baud);
Alan Cox9a8baec2007-06-22 14:40:18 +0100338 if (BSA_USB_CMD(BELKIN_SA_SET_BAUDRATE_REQUEST, urb_value) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700339 dev_err(&port->dev, "Set baudrate error\n");
Alan Cox9a8baec2007-06-22 14:40:18 +0100340 } else {
341 /* Disable flow control */
Alan Coxb69c1492008-07-22 11:09:39 +0100342 if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST,
343 BELKIN_SA_FLOW_NONE) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700344 dev_err(&port->dev, "Disable flowcontrol error\n");
Alan Cox9a8baec2007-06-22 14:40:18 +0100345 /* Drop RTS and DTR */
346 control_state &= ~(TIOCM_DTR | TIOCM_RTS);
347 if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 0) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700348 dev_err(&port->dev, "DTR LOW error\n");
Alan Cox9a8baec2007-06-22 14:40:18 +0100349 if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 0) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700350 dev_err(&port->dev, "RTS LOW error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 }
352
353 /* set the parity */
Alan Coxb69c1492008-07-22 11:09:39 +0100354 if ((cflag ^ old_cflag) & (PARENB | PARODD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 if (cflag & PARENB)
Alan Coxb69c1492008-07-22 11:09:39 +0100356 urb_value = (cflag & PARODD) ? BELKIN_SA_PARITY_ODD
357 : BELKIN_SA_PARITY_EVEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 else
359 urb_value = BELKIN_SA_PARITY_NONE;
360 if (BSA_USB_CMD(BELKIN_SA_SET_PARITY_REQUEST, urb_value) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700361 dev_err(&port->dev, "Set parity error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 }
363
364 /* set the number of data bits */
Alan Coxb69c1492008-07-22 11:09:39 +0100365 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 switch (cflag & CSIZE) {
Alan Coxb69c1492008-07-22 11:09:39 +0100367 case CS5:
368 urb_value = BELKIN_SA_DATA_BITS(5);
369 break;
370 case CS6:
371 urb_value = BELKIN_SA_DATA_BITS(6);
372 break;
373 case CS7:
374 urb_value = BELKIN_SA_DATA_BITS(7);
375 break;
376 case CS8:
377 urb_value = BELKIN_SA_DATA_BITS(8);
378 break;
Ben Minerds70f3c752012-04-28 13:36:35 +1000379 default:
Greg Kroah-Hartmanc89aa632012-05-15 16:27:11 -0700380 dev_dbg(&port->dev,
381 "CSIZE was not CS5-CS8, using default of 8\n");
Alan Coxb69c1492008-07-22 11:09:39 +0100382 urb_value = BELKIN_SA_DATA_BITS(8);
383 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
385 if (BSA_USB_CMD(BELKIN_SA_SET_DATA_BITS_REQUEST, urb_value) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700386 dev_err(&port->dev, "Set data bits error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
388
389 /* set the number of stop bits */
Alan Coxb69c1492008-07-22 11:09:39 +0100390 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
391 urb_value = (cflag & CSTOPB) ? BELKIN_SA_STOP_BITS(2)
392 : BELKIN_SA_STOP_BITS(1);
393 if (BSA_USB_CMD(BELKIN_SA_SET_STOP_BITS_REQUEST,
394 urb_value) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700395 dev_err(&port->dev, "Set stop bits error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 }
397
398 /* Set flow control */
Alan Coxb69c1492008-07-22 11:09:39 +0100399 if (((iflag ^ old_iflag) & (IXOFF | IXON)) ||
400 ((cflag ^ old_cflag) & CRTSCTS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 urb_value = 0;
402 if ((iflag & IXOFF) || (iflag & IXON))
403 urb_value |= (BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON);
404 else
405 urb_value &= ~(BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON);
406
407 if (cflag & CRTSCTS)
408 urb_value |= (BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS);
409 else
410 urb_value &= ~(BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS);
411
412 if (bad_flow_control)
413 urb_value &= ~(BELKIN_SA_FLOW_IRTS);
414
415 if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, urb_value) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700416 dev_err(&port->dev, "Set flow control error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 }
418
419 /* save off the modified port settings */
420 spin_lock_irqsave(&priv->lock, flags);
421 priv->control_state = control_state;
422 spin_unlock_irqrestore(&priv->lock, flags);
Johan Hovold726ef422010-05-15 17:53:51 +0200423}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Alan Cox95da3102008-07-22 11:09:07 +0100425static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426{
Alan Cox95da3102008-07-22 11:09:07 +0100427 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 struct usb_serial *serial = port->serial;
429
430 if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0)
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700431 dev_err(&port->dev, "Set break_ctl %d\n", break_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432}
433
Alan Cox60b33c12011-02-14 16:26:14 +0000434static int belkin_sa_tiocmget(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
Alan Cox95da3102008-07-22 11:09:07 +0100436 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
438 unsigned long control_state;
439 unsigned long flags;
Alan Coxb69c1492008-07-22 11:09:39 +0100440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 spin_lock_irqsave(&priv->lock, flags);
442 control_state = priv->control_state;
443 spin_unlock_irqrestore(&priv->lock, flags);
444
445 return control_state;
446}
447
Alan Cox20b9d172011-02-14 16:26:50 +0000448static int belkin_sa_tiocmset(struct tty_struct *tty,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 unsigned int set, unsigned int clear)
450{
Alan Cox95da3102008-07-22 11:09:07 +0100451 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 struct usb_serial *serial = port->serial;
453 struct belkin_sa_private *priv = usb_get_serial_port_data(port);
454 unsigned long control_state;
455 unsigned long flags;
456 int retval;
457 int rts = 0;
458 int dtr = 0;
Alan Coxb69c1492008-07-22 11:09:39 +0100459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 spin_lock_irqsave(&priv->lock, flags);
461 control_state = priv->control_state;
462
463 if (set & TIOCM_RTS) {
464 control_state |= TIOCM_RTS;
465 rts = 1;
466 }
467 if (set & TIOCM_DTR) {
468 control_state |= TIOCM_DTR;
469 dtr = 1;
470 }
471 if (clear & TIOCM_RTS) {
472 control_state &= ~TIOCM_RTS;
473 rts = 0;
474 }
475 if (clear & TIOCM_DTR) {
476 control_state &= ~TIOCM_DTR;
477 dtr = 0;
478 }
479
480 priv->control_state = control_state;
481 spin_unlock_irqrestore(&priv->lock, flags);
482
483 retval = BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, rts);
484 if (retval < 0) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700485 dev_err(&port->dev, "Set RTS error %d\n", retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 goto exit;
487 }
488
489 retval = BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, dtr);
490 if (retval < 0) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700491 dev_err(&port->dev, "Set DTR error %d\n", retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 goto exit;
493 }
494exit:
495 return retval;
496}
497
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -0700498module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Alan Coxb69c1492008-07-22 11:09:39 +0100500MODULE_AUTHOR(DRIVER_AUTHOR);
501MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502MODULE_LICENSE("GPL");