Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Belkin USB Serial Adapter Driver | |
3 | * | |
4 | * Copyright (C) 2000 William Greathouse (wgreathouse@smva.com) | |
5 | * Copyright (C) 2000-2001 Greg Kroah-Hartman (greg@kroah.com) | |
6 | * | |
7 | * This program is largely derived from work by the linux-usb group | |
8 | * and associated source files. Please see the usb/serial files for | |
9 | * individual credits and copyrights. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
17 | * | |
18 | * TODO: | |
19 | * -- Add true modem contol line query capability. Currently we track the | |
20 | * states reported by the interrupt and the states we request. | |
21 | * -- Add error reporting back to application for UART error conditions. | |
22 | * Just point me at how to implement this and I'll do it. I've put the | |
23 | * framework in, but haven't analyzed the "tty_flip" interface yet. | |
24 | * -- Add support for flush commands | |
25 | * -- Add everything that is missing :) | |
26 | * | |
27 | * 27-Nov-2001 gkh | |
28 | * compressed all the differnent device entries into 1. | |
29 | * | |
30 | * 30-May-2001 gkh | |
31 | * switched from using spinlock to a semaphore, which fixes lots of problems. | |
32 | * | |
33 | * 08-Apr-2001 gb | |
34 | * - Identify version on module load. | |
35 | * | |
36 | * 12-Mar-2001 gkh | |
37 | * - Added support for the GoHubs GO-COM232 device which is the same as the | |
38 | * Peracom device. | |
39 | * | |
40 | * 06-Nov-2000 gkh | |
41 | * - Added support for the old Belkin and Peracom devices. | |
42 | * - Made the port able to be opened multiple times. | |
43 | * - Added some defaults incase the line settings are things these devices | |
44 | * can't support. | |
45 | * | |
46 | * 18-Oct-2000 William Greathouse | |
47 | * Released into the wild (linux-usb-devel) | |
48 | * | |
49 | * 17-Oct-2000 William Greathouse | |
50 | * Add code to recognize firmware version and set hardware flow control | |
51 | * appropriately. Belkin states that firmware prior to 3.05 does not | |
52 | * operate correctly in hardware handshake mode. I have verified this | |
53 | * on firmware 2.05 -- for both RTS and DTR input flow control, the control | |
54 | * line is not reset. The test performed by the Belkin Win* driver is | |
55 | * to enable hardware flow control for firmware 2.06 or greater and | |
56 | * for 1.00 or prior. I am only enabling for 2.06 or greater. | |
57 | * | |
58 | * 12-Oct-2000 William Greathouse | |
59 | * First cut at supporting Belkin USB Serial Adapter F5U103 | |
60 | * I did not have a copy of the original work to support this | |
61 | * adapter, so pardon any stupid mistakes. All of the information | |
62 | * I am using to write this driver was acquired by using a modified | |
63 | * UsbSnoop on Windows2000 and from examining the other USB drivers. | |
64 | */ | |
65 | ||
1da177e4 LT |
66 | #include <linux/kernel.h> |
67 | #include <linux/errno.h> | |
68 | #include <linux/init.h> | |
69 | #include <linux/slab.h> | |
70 | #include <linux/tty.h> | |
71 | #include <linux/tty_driver.h> | |
72 | #include <linux/tty_flip.h> | |
73 | #include <linux/module.h> | |
74 | #include <linux/spinlock.h> | |
75 | #include <asm/uaccess.h> | |
76 | #include <linux/usb.h> | |
a969888c | 77 | #include <linux/usb/serial.h> |
1da177e4 LT |
78 | #include "belkin_sa.h" |
79 | ||
80 | static int debug; | |
81 | ||
82 | /* | |
83 | * Version Information | |
84 | */ | |
85 | #define DRIVER_VERSION "v1.2" | |
86 | #define DRIVER_AUTHOR "William Greathouse <wgreathouse@smva.com>" | |
87 | #define DRIVER_DESC "USB Belkin Serial converter driver" | |
88 | ||
89 | /* function prototypes for a Belkin USB Serial Adapter F5U103 */ | |
90 | static int belkin_sa_startup (struct usb_serial *serial); | |
91 | static void belkin_sa_shutdown (struct usb_serial *serial); | |
95da310e AC |
92 | static int belkin_sa_open (struct tty_struct *tty, struct usb_serial_port *port, struct file *filp); |
93 | static void belkin_sa_close (struct tty_struct *tty, struct usb_serial_port *port, struct file *filp); | |
7d12e780 | 94 | static void belkin_sa_read_int_callback (struct urb *urb); |
95da310e AC |
95 | static void belkin_sa_set_termios (struct tty_struct *tty, struct usb_serial_port *port, struct ktermios * old); |
96 | static void belkin_sa_break_ctl (struct tty_struct *tty, int break_state ); | |
97 | static int belkin_sa_tiocmget (struct tty_struct *tty, struct file *file); | |
98 | static int belkin_sa_tiocmset (struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); | |
1da177e4 LT |
99 | |
100 | ||
101 | static struct usb_device_id id_table_combined [] = { | |
102 | { USB_DEVICE(BELKIN_SA_VID, BELKIN_SA_PID) }, | |
103 | { USB_DEVICE(BELKIN_OLD_VID, BELKIN_OLD_PID) }, | |
104 | { USB_DEVICE(PERACOM_VID, PERACOM_PID) }, | |
105 | { USB_DEVICE(GOHUBS_VID, GOHUBS_PID) }, | |
106 | { USB_DEVICE(GOHUBS_VID, HANDYLINK_PID) }, | |
107 | { USB_DEVICE(BELKIN_DOCKSTATION_VID, BELKIN_DOCKSTATION_PID) }, | |
108 | { } /* Terminating entry */ | |
109 | }; | |
110 | ||
111 | MODULE_DEVICE_TABLE (usb, id_table_combined); | |
112 | ||
113 | static struct usb_driver belkin_driver = { | |
1da177e4 LT |
114 | .name = "belkin", |
115 | .probe = usb_serial_probe, | |
116 | .disconnect = usb_serial_disconnect, | |
117 | .id_table = id_table_combined, | |
ba9dc657 | 118 | .no_dynamic_id = 1, |
1da177e4 LT |
119 | }; |
120 | ||
121 | /* All of the device info needed for the serial converters */ | |
ea65370d | 122 | static struct usb_serial_driver belkin_device = { |
18fcac35 GKH |
123 | .driver = { |
124 | .owner = THIS_MODULE, | |
269bda1c | 125 | .name = "belkin", |
18fcac35 | 126 | }, |
269bda1c | 127 | .description = "Belkin / Peracom / GoHubs USB Serial Adapter", |
d9b1b787 | 128 | .usb_driver = &belkin_driver, |
1da177e4 | 129 | .id_table = id_table_combined, |
1da177e4 LT |
130 | .num_ports = 1, |
131 | .open = belkin_sa_open, | |
132 | .close = belkin_sa_close, | |
133 | .read_int_callback = belkin_sa_read_int_callback, /* How we get the status info */ | |
1da177e4 LT |
134 | .set_termios = belkin_sa_set_termios, |
135 | .break_ctl = belkin_sa_break_ctl, | |
136 | .tiocmget = belkin_sa_tiocmget, | |
137 | .tiocmset = belkin_sa_tiocmset, | |
138 | .attach = belkin_sa_startup, | |
139 | .shutdown = belkin_sa_shutdown, | |
140 | }; | |
141 | ||
142 | ||
143 | struct belkin_sa_private { | |
144 | spinlock_t lock; | |
145 | unsigned long control_state; | |
146 | unsigned char last_lsr; | |
147 | unsigned char last_msr; | |
148 | int bad_flow_control; | |
149 | }; | |
150 | ||
151 | ||
152 | /* | |
153 | * *************************************************************************** | |
154 | * Belkin USB Serial Adapter F5U103 specific driver functions | |
155 | * *************************************************************************** | |
156 | */ | |
157 | ||
158 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
159 | ||
160 | /* assumes that struct usb_serial *serial is available */ | |
161 | #define BSA_USB_CMD(c,v) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), \ | |
162 | (c), BELKIN_SA_SET_REQUEST_TYPE, \ | |
163 | (v), 0, NULL, 0, WDR_TIMEOUT) | |
164 | ||
165 | /* do some startup allocations not currently performed by usb_serial_probe() */ | |
166 | static int belkin_sa_startup (struct usb_serial *serial) | |
167 | { | |
168 | struct usb_device *dev = serial->dev; | |
169 | struct belkin_sa_private *priv; | |
170 | ||
171 | /* allocate the private data structure */ | |
172 | priv = kmalloc(sizeof(struct belkin_sa_private), GFP_KERNEL); | |
173 | if (!priv) | |
174 | return (-1); /* error */ | |
175 | /* set initial values for control structures */ | |
176 | spin_lock_init(&priv->lock); | |
177 | priv->control_state = 0; | |
178 | priv->last_lsr = 0; | |
179 | priv->last_msr = 0; | |
180 | /* see comments at top of file */ | |
181 | priv->bad_flow_control = (le16_to_cpu(dev->descriptor.bcdDevice) <= 0x0206) ? 1 : 0; | |
182 | info("bcdDevice: %04x, bfc: %d", le16_to_cpu(dev->descriptor.bcdDevice), priv->bad_flow_control); | |
183 | ||
184 | init_waitqueue_head(&serial->port[0]->write_wait); | |
185 | usb_set_serial_port_data(serial->port[0], priv); | |
186 | ||
187 | return (0); | |
188 | } | |
189 | ||
190 | ||
95da310e | 191 | static void belkin_sa_shutdown(struct usb_serial *serial) |
1da177e4 LT |
192 | { |
193 | struct belkin_sa_private *priv; | |
194 | int i; | |
195 | ||
441b62c1 | 196 | dbg ("%s", __func__); |
1da177e4 LT |
197 | |
198 | /* stop reads and writes on all ports */ | |
199 | for (i=0; i < serial->num_ports; ++i) { | |
200 | /* My special items, the standard routines free my urbs */ | |
201 | priv = usb_get_serial_port_data(serial->port[i]); | |
1bc3c9e1 | 202 | kfree(priv); |
1da177e4 LT |
203 | } |
204 | } | |
205 | ||
206 | ||
95da310e | 207 | static int belkin_sa_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) |
1da177e4 LT |
208 | { |
209 | int retval = 0; | |
210 | ||
441b62c1 | 211 | dbg("%s port %d", __func__, port->number); |
1da177e4 LT |
212 | |
213 | /*Start reading from the device*/ | |
214 | /* TODO: Look at possibility of submitting multiple URBs to device to | |
215 | * enhance buffering. Win trace shows 16 initial read URBs. | |
216 | */ | |
217 | port->read_urb->dev = port->serial->dev; | |
218 | retval = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
219 | if (retval) { | |
220 | err("usb_submit_urb(read bulk) failed"); | |
221 | goto exit; | |
222 | } | |
223 | ||
224 | port->interrupt_in_urb->dev = port->serial->dev; | |
225 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
226 | if (retval) { | |
227 | usb_kill_urb(port->read_urb); | |
228 | err(" usb_submit_urb(read int) failed"); | |
229 | } | |
230 | ||
231 | exit: | |
232 | return retval; | |
233 | } /* belkin_sa_open */ | |
234 | ||
235 | ||
95da310e AC |
236 | static void belkin_sa_close (struct tty_struct *tty, |
237 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 | 238 | { |
441b62c1 | 239 | dbg("%s port %d", __func__, port->number); |
1da177e4 LT |
240 | |
241 | /* shutdown our bulk reads and writes */ | |
242 | usb_kill_urb(port->write_urb); | |
243 | usb_kill_urb(port->read_urb); | |
244 | usb_kill_urb(port->interrupt_in_urb); | |
245 | } /* belkin_sa_close */ | |
246 | ||
247 | ||
95da310e | 248 | static void belkin_sa_read_int_callback(struct urb *urb) |
1da177e4 | 249 | { |
cdc97792 | 250 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
251 | struct belkin_sa_private *priv; |
252 | unsigned char *data = urb->transfer_buffer; | |
253 | int retval; | |
f26aad25 | 254 | int status = urb->status; |
1da177e4 LT |
255 | unsigned long flags; |
256 | ||
f26aad25 | 257 | switch (status) { |
1da177e4 LT |
258 | case 0: |
259 | /* success */ | |
260 | break; | |
261 | case -ECONNRESET: | |
262 | case -ENOENT: | |
263 | case -ESHUTDOWN: | |
264 | /* this urb is terminated, clean up */ | |
f26aad25 | 265 | dbg("%s - urb shutting down with status: %d", |
441b62c1 | 266 | __func__, status); |
1da177e4 LT |
267 | return; |
268 | default: | |
f26aad25 | 269 | dbg("%s - nonzero urb status received: %d", |
441b62c1 | 270 | __func__, status); |
1da177e4 LT |
271 | goto exit; |
272 | } | |
273 | ||
441b62c1 | 274 | usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data); |
1da177e4 LT |
275 | |
276 | /* Handle known interrupt data */ | |
277 | /* ignore data[0] and data[1] */ | |
278 | ||
279 | priv = usb_get_serial_port_data(port); | |
280 | spin_lock_irqsave(&priv->lock, flags); | |
281 | priv->last_msr = data[BELKIN_SA_MSR_INDEX]; | |
282 | ||
283 | /* Record Control Line states */ | |
284 | if (priv->last_msr & BELKIN_SA_MSR_DSR) | |
285 | priv->control_state |= TIOCM_DSR; | |
286 | else | |
287 | priv->control_state &= ~TIOCM_DSR; | |
288 | ||
289 | if (priv->last_msr & BELKIN_SA_MSR_CTS) | |
290 | priv->control_state |= TIOCM_CTS; | |
291 | else | |
292 | priv->control_state &= ~TIOCM_CTS; | |
293 | ||
294 | if (priv->last_msr & BELKIN_SA_MSR_RI) | |
295 | priv->control_state |= TIOCM_RI; | |
296 | else | |
297 | priv->control_state &= ~TIOCM_RI; | |
298 | ||
299 | if (priv->last_msr & BELKIN_SA_MSR_CD) | |
300 | priv->control_state |= TIOCM_CD; | |
301 | else | |
302 | priv->control_state &= ~TIOCM_CD; | |
303 | ||
304 | /* Now to report any errors */ | |
305 | priv->last_lsr = data[BELKIN_SA_LSR_INDEX]; | |
306 | #if 0 | |
307 | /* | |
308 | * fill in the flip buffer here, but I do not know the relation | |
309 | * to the current/next receive buffer or characters. I need | |
310 | * to look in to this before committing any code. | |
311 | */ | |
312 | if (priv->last_lsr & BELKIN_SA_LSR_ERR) { | |
95da310e | 313 | tty = port->port.tty; |
1da177e4 LT |
314 | /* Overrun Error */ |
315 | if (priv->last_lsr & BELKIN_SA_LSR_OE) { | |
316 | } | |
317 | /* Parity Error */ | |
318 | if (priv->last_lsr & BELKIN_SA_LSR_PE) { | |
319 | } | |
320 | /* Framing Error */ | |
321 | if (priv->last_lsr & BELKIN_SA_LSR_FE) { | |
322 | } | |
323 | /* Break Indicator */ | |
324 | if (priv->last_lsr & BELKIN_SA_LSR_BI) { | |
325 | } | |
326 | } | |
327 | #endif | |
328 | spin_unlock_irqrestore(&priv->lock, flags); | |
329 | exit: | |
330 | retval = usb_submit_urb (urb, GFP_ATOMIC); | |
331 | if (retval) | |
332 | err ("%s - usb_submit_urb failed with result %d", | |
441b62c1 | 333 | __func__, retval); |
1da177e4 LT |
334 | } |
335 | ||
95da310e AC |
336 | static void belkin_sa_set_termios(struct tty_struct *tty, |
337 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
338 | { |
339 | struct usb_serial *serial = port->serial; | |
340 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); | |
341 | unsigned int iflag; | |
342 | unsigned int cflag; | |
343 | unsigned int old_iflag = 0; | |
344 | unsigned int old_cflag = 0; | |
345 | __u16 urb_value = 0; /* Will hold the new flags */ | |
346 | unsigned long flags; | |
347 | unsigned long control_state; | |
348 | int bad_flow_control; | |
9a8baec7 | 349 | speed_t baud; |
95da310e | 350 | struct ktermios *termios = tty->termios; |
1da177e4 | 351 | |
3ec466b4 AC |
352 | iflag = termios->c_iflag; |
353 | cflag = termios->c_cflag; | |
1da177e4 | 354 | |
3ec466b4 | 355 | termios->c_cflag &= ~CMSPAR; |
1da177e4 LT |
356 | |
357 | /* get a local copy of the current port settings */ | |
358 | spin_lock_irqsave(&priv->lock, flags); | |
359 | control_state = priv->control_state; | |
360 | bad_flow_control = priv->bad_flow_control; | |
361 | spin_unlock_irqrestore(&priv->lock, flags); | |
362 | ||
9a8baec7 AC |
363 | old_iflag = old_termios->c_iflag; |
364 | old_cflag = old_termios->c_cflag; | |
1da177e4 LT |
365 | |
366 | /* Set the baud rate */ | |
3ec466b4 | 367 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { |
1da177e4 LT |
368 | /* reassert DTR and (maybe) RTS on transition from B0 */ |
369 | if( (old_cflag&CBAUD) == B0 ) { | |
370 | control_state |= (TIOCM_DTR|TIOCM_RTS); | |
371 | if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 1) < 0) | |
372 | err("Set DTR error"); | |
373 | /* don't set RTS if using hardware flow control */ | |
3ec466b4 | 374 | if (!(old_cflag & CRTSCTS)) |
1da177e4 LT |
375 | if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 1) < 0) |
376 | err("Set RTS error"); | |
377 | } | |
9a8baec7 | 378 | } |
1da177e4 | 379 | |
95da310e | 380 | baud = tty_get_baud_rate(tty); |
3ec466b4 AC |
381 | if (baud) { |
382 | urb_value = BELKIN_SA_BAUD(baud); | |
383 | /* Clip to maximum speed */ | |
384 | if (urb_value == 0) | |
385 | urb_value = 1; | |
386 | /* Turn it back into a resulting real baud rate */ | |
387 | baud = BELKIN_SA_BAUD(urb_value); | |
388 | ||
389 | /* Report the actual baud rate back to the caller */ | |
95da310e | 390 | tty_encode_baud_rate(tty, baud, baud); |
9a8baec7 AC |
391 | if (BSA_USB_CMD(BELKIN_SA_SET_BAUDRATE_REQUEST, urb_value) < 0) |
392 | err("Set baudrate error"); | |
393 | } else { | |
394 | /* Disable flow control */ | |
395 | if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, BELKIN_SA_FLOW_NONE) < 0) | |
396 | err("Disable flowcontrol error"); | |
397 | /* Drop RTS and DTR */ | |
398 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
399 | if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 0) < 0) | |
400 | err("DTR LOW error"); | |
401 | if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 0) < 0) | |
402 | err("RTS LOW error"); | |
1da177e4 LT |
403 | } |
404 | ||
405 | /* set the parity */ | |
406 | if( (cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD)) ) { | |
407 | if (cflag & PARENB) | |
408 | urb_value = (cflag & PARODD) ? BELKIN_SA_PARITY_ODD : BELKIN_SA_PARITY_EVEN; | |
409 | else | |
410 | urb_value = BELKIN_SA_PARITY_NONE; | |
411 | if (BSA_USB_CMD(BELKIN_SA_SET_PARITY_REQUEST, urb_value) < 0) | |
412 | err("Set parity error"); | |
413 | } | |
414 | ||
415 | /* set the number of data bits */ | |
416 | if( (cflag&CSIZE) != (old_cflag&CSIZE) ) { | |
417 | switch (cflag & CSIZE) { | |
418 | case CS5: urb_value = BELKIN_SA_DATA_BITS(5); break; | |
419 | case CS6: urb_value = BELKIN_SA_DATA_BITS(6); break; | |
420 | case CS7: urb_value = BELKIN_SA_DATA_BITS(7); break; | |
421 | case CS8: urb_value = BELKIN_SA_DATA_BITS(8); break; | |
9a8baec7 | 422 | default: dbg("CSIZE was not CS5-CS8, using default of 8"); |
1da177e4 LT |
423 | urb_value = BELKIN_SA_DATA_BITS(8); |
424 | break; | |
425 | } | |
426 | if (BSA_USB_CMD(BELKIN_SA_SET_DATA_BITS_REQUEST, urb_value) < 0) | |
427 | err("Set data bits error"); | |
428 | } | |
429 | ||
430 | /* set the number of stop bits */ | |
431 | if( (cflag&CSTOPB) != (old_cflag&CSTOPB) ) { | |
432 | urb_value = (cflag & CSTOPB) ? BELKIN_SA_STOP_BITS(2) : BELKIN_SA_STOP_BITS(1); | |
433 | if (BSA_USB_CMD(BELKIN_SA_SET_STOP_BITS_REQUEST, urb_value) < 0) | |
434 | err("Set stop bits error"); | |
435 | } | |
436 | ||
437 | /* Set flow control */ | |
438 | if( (iflag&IXOFF) != (old_iflag&IXOFF) | |
439 | || (iflag&IXON) != (old_iflag&IXON) | |
440 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS) ) { | |
441 | urb_value = 0; | |
442 | if ((iflag & IXOFF) || (iflag & IXON)) | |
443 | urb_value |= (BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON); | |
444 | else | |
445 | urb_value &= ~(BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON); | |
446 | ||
447 | if (cflag & CRTSCTS) | |
448 | urb_value |= (BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS); | |
449 | else | |
450 | urb_value &= ~(BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS); | |
451 | ||
452 | if (bad_flow_control) | |
453 | urb_value &= ~(BELKIN_SA_FLOW_IRTS); | |
454 | ||
455 | if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, urb_value) < 0) | |
456 | err("Set flow control error"); | |
457 | } | |
458 | ||
459 | /* save off the modified port settings */ | |
460 | spin_lock_irqsave(&priv->lock, flags); | |
461 | priv->control_state = control_state; | |
462 | spin_unlock_irqrestore(&priv->lock, flags); | |
463 | } /* belkin_sa_set_termios */ | |
464 | ||
465 | ||
95da310e | 466 | static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 467 | { |
95da310e | 468 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
469 | struct usb_serial *serial = port->serial; |
470 | ||
471 | if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0) | |
472 | err("Set break_ctl %d", break_state); | |
473 | } | |
474 | ||
475 | ||
95da310e | 476 | static int belkin_sa_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 477 | { |
95da310e | 478 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
479 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); |
480 | unsigned long control_state; | |
481 | unsigned long flags; | |
482 | ||
441b62c1 | 483 | dbg("%s", __func__); |
1da177e4 LT |
484 | |
485 | spin_lock_irqsave(&priv->lock, flags); | |
486 | control_state = priv->control_state; | |
487 | spin_unlock_irqrestore(&priv->lock, flags); | |
488 | ||
489 | return control_state; | |
490 | } | |
491 | ||
492 | ||
95da310e | 493 | static int belkin_sa_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
494 | unsigned int set, unsigned int clear) |
495 | { | |
95da310e | 496 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
497 | struct usb_serial *serial = port->serial; |
498 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); | |
499 | unsigned long control_state; | |
500 | unsigned long flags; | |
501 | int retval; | |
502 | int rts = 0; | |
503 | int dtr = 0; | |
504 | ||
441b62c1 | 505 | dbg("%s", __func__); |
1da177e4 LT |
506 | |
507 | spin_lock_irqsave(&priv->lock, flags); | |
508 | control_state = priv->control_state; | |
509 | ||
510 | if (set & TIOCM_RTS) { | |
511 | control_state |= TIOCM_RTS; | |
512 | rts = 1; | |
513 | } | |
514 | if (set & TIOCM_DTR) { | |
515 | control_state |= TIOCM_DTR; | |
516 | dtr = 1; | |
517 | } | |
518 | if (clear & TIOCM_RTS) { | |
519 | control_state &= ~TIOCM_RTS; | |
520 | rts = 0; | |
521 | } | |
522 | if (clear & TIOCM_DTR) { | |
523 | control_state &= ~TIOCM_DTR; | |
524 | dtr = 0; | |
525 | } | |
526 | ||
527 | priv->control_state = control_state; | |
528 | spin_unlock_irqrestore(&priv->lock, flags); | |
529 | ||
530 | retval = BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, rts); | |
531 | if (retval < 0) { | |
532 | err("Set RTS error %d", retval); | |
533 | goto exit; | |
534 | } | |
535 | ||
536 | retval = BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, dtr); | |
537 | if (retval < 0) { | |
538 | err("Set DTR error %d", retval); | |
539 | goto exit; | |
540 | } | |
541 | exit: | |
542 | return retval; | |
543 | } | |
544 | ||
545 | ||
95da310e | 546 | static int __init belkin_sa_init(void) |
1da177e4 LT |
547 | { |
548 | int retval; | |
549 | retval = usb_serial_register(&belkin_device); | |
550 | if (retval) | |
551 | goto failed_usb_serial_register; | |
552 | retval = usb_register(&belkin_driver); | |
553 | if (retval) | |
554 | goto failed_usb_register; | |
555 | info(DRIVER_DESC " " DRIVER_VERSION); | |
556 | return 0; | |
557 | failed_usb_register: | |
558 | usb_serial_deregister(&belkin_device); | |
559 | failed_usb_serial_register: | |
560 | return retval; | |
561 | } | |
562 | ||
563 | ||
564 | static void __exit belkin_sa_exit (void) | |
565 | { | |
566 | usb_deregister (&belkin_driver); | |
95da310e | 567 | usb_serial_deregister(&belkin_device); |
1da177e4 LT |
568 | } |
569 | ||
570 | ||
571 | module_init (belkin_sa_init); | |
572 | module_exit (belkin_sa_exit); | |
573 | ||
574 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
575 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
576 | MODULE_VERSION( DRIVER_VERSION ); | |
577 | MODULE_LICENSE("GPL"); | |
578 | ||
579 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
580 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |