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. | |
b69c1499 | 10 | * |
1da177e4 LT |
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 | * | |
b69c1499 AC |
16 | * See Documentation/usb/usb-serial.txt for more information on using this |
17 | * driver | |
1da177e4 LT |
18 | * |
19 | * TODO: | |
20 | * -- Add true modem contol line query capability. Currently we track the | |
21 | * states reported by the interrupt and the states we request. | |
22 | * -- Add error reporting back to application for UART error conditions. | |
23 | * Just point me at how to implement this and I'll do it. I've put the | |
24 | * framework in, but haven't analyzed the "tty_flip" interface yet. | |
25 | * -- Add support for flush commands | |
26 | * -- Add everything that is missing :) | |
27 | * | |
28 | * 27-Nov-2001 gkh | |
29 | * compressed all the differnent device entries into 1. | |
30 | * | |
31 | * 30-May-2001 gkh | |
b69c1499 AC |
32 | * switched from using spinlock to a semaphore, which fixes lots of |
33 | * problems. | |
1da177e4 LT |
34 | * |
35 | * 08-Apr-2001 gb | |
36 | * - Identify version on module load. | |
37 | * | |
38 | * 12-Mar-2001 gkh | |
39 | * - Added support for the GoHubs GO-COM232 device which is the same as the | |
40 | * Peracom device. | |
41 | * | |
42 | * 06-Nov-2000 gkh | |
43 | * - Added support for the old Belkin and Peracom devices. | |
44 | * - Made the port able to be opened multiple times. | |
45 | * - Added some defaults incase the line settings are things these devices | |
b69c1499 | 46 | * can't support. |
1da177e4 LT |
47 | * |
48 | * 18-Oct-2000 William Greathouse | |
49 | * Released into the wild (linux-usb-devel) | |
50 | * | |
51 | * 17-Oct-2000 William Greathouse | |
52 | * Add code to recognize firmware version and set hardware flow control | |
53 | * appropriately. Belkin states that firmware prior to 3.05 does not | |
54 | * operate correctly in hardware handshake mode. I have verified this | |
55 | * on firmware 2.05 -- for both RTS and DTR input flow control, the control | |
56 | * line is not reset. The test performed by the Belkin Win* driver is | |
57 | * to enable hardware flow control for firmware 2.06 or greater and | |
58 | * for 1.00 or prior. I am only enabling for 2.06 or greater. | |
59 | * | |
60 | * 12-Oct-2000 William Greathouse | |
61 | * First cut at supporting Belkin USB Serial Adapter F5U103 | |
62 | * I did not have a copy of the original work to support this | |
63 | * adapter, so pardon any stupid mistakes. All of the information | |
64 | * I am using to write this driver was acquired by using a modified | |
65 | * UsbSnoop on Windows2000 and from examining the other USB drivers. | |
66 | */ | |
67 | ||
1da177e4 LT |
68 | #include <linux/kernel.h> |
69 | #include <linux/errno.h> | |
70 | #include <linux/init.h> | |
71 | #include <linux/slab.h> | |
72 | #include <linux/tty.h> | |
73 | #include <linux/tty_driver.h> | |
74 | #include <linux/tty_flip.h> | |
75 | #include <linux/module.h> | |
76 | #include <linux/spinlock.h> | |
b69c1499 | 77 | #include <linux/uaccess.h> |
1da177e4 | 78 | #include <linux/usb.h> |
a969888c | 79 | #include <linux/usb/serial.h> |
1da177e4 LT |
80 | #include "belkin_sa.h" |
81 | ||
82 | static int debug; | |
83 | ||
84 | /* | |
85 | * Version Information | |
86 | */ | |
87 | #define DRIVER_VERSION "v1.2" | |
88 | #define DRIVER_AUTHOR "William Greathouse <wgreathouse@smva.com>" | |
89 | #define DRIVER_DESC "USB Belkin Serial converter driver" | |
90 | ||
91 | /* function prototypes for a Belkin USB Serial Adapter F5U103 */ | |
b69c1499 AC |
92 | static int belkin_sa_startup(struct usb_serial *serial); |
93 | static void belkin_sa_shutdown(struct usb_serial *serial); | |
94 | static int belkin_sa_open(struct tty_struct *tty, | |
95 | struct usb_serial_port *port, struct file *filp); | |
96 | static void belkin_sa_close(struct tty_struct *tty, | |
97 | struct usb_serial_port *port, struct file *filp); | |
98 | static void belkin_sa_read_int_callback(struct urb *urb); | |
99 | static void belkin_sa_set_termios(struct tty_struct *tty, | |
100 | struct usb_serial_port *port, struct ktermios * old); | |
101 | static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state); | |
102 | static int belkin_sa_tiocmget(struct tty_struct *tty, struct file *file); | |
103 | static int belkin_sa_tiocmset(struct tty_struct *tty, struct file *file, | |
104 | unsigned int set, unsigned int clear); | |
1da177e4 LT |
105 | |
106 | ||
107 | static struct usb_device_id id_table_combined [] = { | |
108 | { USB_DEVICE(BELKIN_SA_VID, BELKIN_SA_PID) }, | |
109 | { USB_DEVICE(BELKIN_OLD_VID, BELKIN_OLD_PID) }, | |
110 | { USB_DEVICE(PERACOM_VID, PERACOM_PID) }, | |
111 | { USB_DEVICE(GOHUBS_VID, GOHUBS_PID) }, | |
112 | { USB_DEVICE(GOHUBS_VID, HANDYLINK_PID) }, | |
113 | { USB_DEVICE(BELKIN_DOCKSTATION_VID, BELKIN_DOCKSTATION_PID) }, | |
b69c1499 | 114 | { } /* Terminating entry */ |
1da177e4 LT |
115 | }; |
116 | ||
b69c1499 | 117 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
118 | |
119 | static struct usb_driver belkin_driver = { | |
1da177e4 LT |
120 | .name = "belkin", |
121 | .probe = usb_serial_probe, | |
122 | .disconnect = usb_serial_disconnect, | |
123 | .id_table = id_table_combined, | |
ba9dc657 | 124 | .no_dynamic_id = 1, |
1da177e4 LT |
125 | }; |
126 | ||
127 | /* All of the device info needed for the serial converters */ | |
ea65370d | 128 | static struct usb_serial_driver belkin_device = { |
18fcac35 GKH |
129 | .driver = { |
130 | .owner = THIS_MODULE, | |
269bda1c | 131 | .name = "belkin", |
18fcac35 | 132 | }, |
269bda1c | 133 | .description = "Belkin / Peracom / GoHubs USB Serial Adapter", |
d9b1b787 | 134 | .usb_driver = &belkin_driver, |
1da177e4 | 135 | .id_table = id_table_combined, |
1da177e4 LT |
136 | .num_ports = 1, |
137 | .open = belkin_sa_open, | |
138 | .close = belkin_sa_close, | |
b69c1499 AC |
139 | .read_int_callback = belkin_sa_read_int_callback, |
140 | /* How we get the status info */ | |
1da177e4 LT |
141 | .set_termios = belkin_sa_set_termios, |
142 | .break_ctl = belkin_sa_break_ctl, | |
143 | .tiocmget = belkin_sa_tiocmget, | |
144 | .tiocmset = belkin_sa_tiocmset, | |
145 | .attach = belkin_sa_startup, | |
146 | .shutdown = belkin_sa_shutdown, | |
147 | }; | |
148 | ||
149 | ||
150 | struct belkin_sa_private { | |
151 | spinlock_t lock; | |
152 | unsigned long control_state; | |
153 | unsigned char last_lsr; | |
154 | unsigned char last_msr; | |
155 | int bad_flow_control; | |
156 | }; | |
157 | ||
158 | ||
159 | /* | |
160 | * *************************************************************************** | |
161 | * Belkin USB Serial Adapter F5U103 specific driver functions | |
162 | * *************************************************************************** | |
163 | */ | |
164 | ||
165 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
166 | ||
167 | /* assumes that struct usb_serial *serial is available */ | |
b69c1499 | 168 | #define BSA_USB_CMD(c, v) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), \ |
1da177e4 LT |
169 | (c), BELKIN_SA_SET_REQUEST_TYPE, \ |
170 | (v), 0, NULL, 0, WDR_TIMEOUT) | |
171 | ||
172 | /* do some startup allocations not currently performed by usb_serial_probe() */ | |
b69c1499 | 173 | static int belkin_sa_startup(struct usb_serial *serial) |
1da177e4 LT |
174 | { |
175 | struct usb_device *dev = serial->dev; | |
176 | struct belkin_sa_private *priv; | |
177 | ||
178 | /* allocate the private data structure */ | |
179 | priv = kmalloc(sizeof(struct belkin_sa_private), GFP_KERNEL); | |
180 | if (!priv) | |
b69c1499 | 181 | return -1; /* error */ |
1da177e4 LT |
182 | /* set initial values for control structures */ |
183 | spin_lock_init(&priv->lock); | |
184 | priv->control_state = 0; | |
185 | priv->last_lsr = 0; | |
186 | priv->last_msr = 0; | |
187 | /* see comments at top of file */ | |
b69c1499 AC |
188 | priv->bad_flow_control = |
189 | (le16_to_cpu(dev->descriptor.bcdDevice) <= 0x0206) ? 1 : 0; | |
c197a8db | 190 | dev_info(&dev->dev, "bcdDevice: %04x, bfc: %d\n", |
b69c1499 AC |
191 | le16_to_cpu(dev->descriptor.bcdDevice), |
192 | priv->bad_flow_control); | |
1da177e4 LT |
193 | |
194 | init_waitqueue_head(&serial->port[0]->write_wait); | |
195 | usb_set_serial_port_data(serial->port[0], priv); | |
b69c1499 AC |
196 | |
197 | return 0; | |
1da177e4 LT |
198 | } |
199 | ||
200 | ||
95da310e | 201 | static void belkin_sa_shutdown(struct usb_serial *serial) |
1da177e4 LT |
202 | { |
203 | struct belkin_sa_private *priv; | |
204 | int i; | |
b69c1499 AC |
205 | |
206 | dbg("%s", __func__); | |
1da177e4 LT |
207 | |
208 | /* stop reads and writes on all ports */ | |
b69c1499 | 209 | for (i = 0; i < serial->num_ports; ++i) { |
1da177e4 LT |
210 | /* My special items, the standard routines free my urbs */ |
211 | priv = usb_get_serial_port_data(serial->port[i]); | |
1bc3c9e1 | 212 | kfree(priv); |
1da177e4 LT |
213 | } |
214 | } | |
215 | ||
216 | ||
b69c1499 AC |
217 | static int belkin_sa_open(struct tty_struct *tty, |
218 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 LT |
219 | { |
220 | int retval = 0; | |
221 | ||
441b62c1 | 222 | dbg("%s port %d", __func__, port->number); |
1da177e4 LT |
223 | |
224 | /*Start reading from the device*/ | |
225 | /* TODO: Look at possibility of submitting multiple URBs to device to | |
226 | * enhance buffering. Win trace shows 16 initial read URBs. | |
227 | */ | |
228 | port->read_urb->dev = port->serial->dev; | |
229 | retval = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
230 | if (retval) { | |
194343d9 | 231 | dev_err(&port->dev, "usb_submit_urb(read bulk) failed\n"); |
1da177e4 LT |
232 | goto exit; |
233 | } | |
234 | ||
235 | port->interrupt_in_urb->dev = port->serial->dev; | |
236 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
237 | if (retval) { | |
238 | usb_kill_urb(port->read_urb); | |
194343d9 | 239 | dev_err(&port->dev, "usb_submit_urb(read int) failed\n"); |
1da177e4 LT |
240 | } |
241 | ||
242 | exit: | |
243 | return retval; | |
244 | } /* belkin_sa_open */ | |
245 | ||
246 | ||
b69c1499 | 247 | static void belkin_sa_close(struct tty_struct *tty, |
95da310e | 248 | struct usb_serial_port *port, struct file *filp) |
1da177e4 | 249 | { |
441b62c1 | 250 | dbg("%s port %d", __func__, port->number); |
1da177e4 LT |
251 | |
252 | /* shutdown our bulk reads and writes */ | |
253 | usb_kill_urb(port->write_urb); | |
254 | usb_kill_urb(port->read_urb); | |
255 | usb_kill_urb(port->interrupt_in_urb); | |
256 | } /* belkin_sa_close */ | |
257 | ||
258 | ||
95da310e | 259 | static void belkin_sa_read_int_callback(struct urb *urb) |
1da177e4 | 260 | { |
cdc97792 | 261 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
262 | struct belkin_sa_private *priv; |
263 | unsigned char *data = urb->transfer_buffer; | |
264 | int retval; | |
f26aad25 | 265 | int status = urb->status; |
1da177e4 LT |
266 | unsigned long flags; |
267 | ||
f26aad25 | 268 | switch (status) { |
1da177e4 LT |
269 | case 0: |
270 | /* success */ | |
271 | break; | |
272 | case -ECONNRESET: | |
273 | case -ENOENT: | |
274 | case -ESHUTDOWN: | |
275 | /* this urb is terminated, clean up */ | |
f26aad25 | 276 | dbg("%s - urb shutting down with status: %d", |
441b62c1 | 277 | __func__, status); |
1da177e4 LT |
278 | return; |
279 | default: | |
f26aad25 | 280 | dbg("%s - nonzero urb status received: %d", |
441b62c1 | 281 | __func__, status); |
1da177e4 LT |
282 | goto exit; |
283 | } | |
284 | ||
b69c1499 AC |
285 | usb_serial_debug_data(debug, &port->dev, __func__, |
286 | urb->actual_length, data); | |
1da177e4 LT |
287 | |
288 | /* Handle known interrupt data */ | |
289 | /* ignore data[0] and data[1] */ | |
290 | ||
291 | priv = usb_get_serial_port_data(port); | |
292 | spin_lock_irqsave(&priv->lock, flags); | |
293 | priv->last_msr = data[BELKIN_SA_MSR_INDEX]; | |
b69c1499 | 294 | |
1da177e4 LT |
295 | /* Record Control Line states */ |
296 | if (priv->last_msr & BELKIN_SA_MSR_DSR) | |
297 | priv->control_state |= TIOCM_DSR; | |
298 | else | |
299 | priv->control_state &= ~TIOCM_DSR; | |
300 | ||
301 | if (priv->last_msr & BELKIN_SA_MSR_CTS) | |
302 | priv->control_state |= TIOCM_CTS; | |
303 | else | |
304 | priv->control_state &= ~TIOCM_CTS; | |
305 | ||
306 | if (priv->last_msr & BELKIN_SA_MSR_RI) | |
307 | priv->control_state |= TIOCM_RI; | |
308 | else | |
309 | priv->control_state &= ~TIOCM_RI; | |
310 | ||
311 | if (priv->last_msr & BELKIN_SA_MSR_CD) | |
312 | priv->control_state |= TIOCM_CD; | |
313 | else | |
314 | priv->control_state &= ~TIOCM_CD; | |
315 | ||
316 | /* Now to report any errors */ | |
317 | priv->last_lsr = data[BELKIN_SA_LSR_INDEX]; | |
318 | #if 0 | |
319 | /* | |
320 | * fill in the flip buffer here, but I do not know the relation | |
321 | * to the current/next receive buffer or characters. I need | |
322 | * to look in to this before committing any code. | |
323 | */ | |
324 | if (priv->last_lsr & BELKIN_SA_LSR_ERR) { | |
4a90f09b | 325 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
326 | /* Overrun Error */ |
327 | if (priv->last_lsr & BELKIN_SA_LSR_OE) { | |
328 | } | |
329 | /* Parity Error */ | |
330 | if (priv->last_lsr & BELKIN_SA_LSR_PE) { | |
331 | } | |
332 | /* Framing Error */ | |
333 | if (priv->last_lsr & BELKIN_SA_LSR_FE) { | |
334 | } | |
335 | /* Break Indicator */ | |
336 | if (priv->last_lsr & BELKIN_SA_LSR_BI) { | |
337 | } | |
4a90f09b | 338 | tty_kref_put(tty); |
1da177e4 LT |
339 | } |
340 | #endif | |
341 | spin_unlock_irqrestore(&priv->lock, flags); | |
342 | exit: | |
b69c1499 | 343 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
1da177e4 | 344 | if (retval) |
194343d9 GKH |
345 | dev_err(&port->dev, "%s - usb_submit_urb failed with " |
346 | "result %d\n", __func__, retval); | |
1da177e4 LT |
347 | } |
348 | ||
95da310e AC |
349 | static void belkin_sa_set_termios(struct tty_struct *tty, |
350 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
351 | { |
352 | struct usb_serial *serial = port->serial; | |
353 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); | |
354 | unsigned int iflag; | |
355 | unsigned int cflag; | |
356 | unsigned int old_iflag = 0; | |
357 | unsigned int old_cflag = 0; | |
358 | __u16 urb_value = 0; /* Will hold the new flags */ | |
359 | unsigned long flags; | |
360 | unsigned long control_state; | |
361 | int bad_flow_control; | |
9a8baec7 | 362 | speed_t baud; |
95da310e | 363 | struct ktermios *termios = tty->termios; |
b69c1499 | 364 | |
3ec466b4 AC |
365 | iflag = termios->c_iflag; |
366 | cflag = termios->c_cflag; | |
1da177e4 | 367 | |
3ec466b4 | 368 | termios->c_cflag &= ~CMSPAR; |
1da177e4 LT |
369 | |
370 | /* get a local copy of the current port settings */ | |
371 | spin_lock_irqsave(&priv->lock, flags); | |
372 | control_state = priv->control_state; | |
373 | bad_flow_control = priv->bad_flow_control; | |
374 | spin_unlock_irqrestore(&priv->lock, flags); | |
b69c1499 | 375 | |
9a8baec7 AC |
376 | old_iflag = old_termios->c_iflag; |
377 | old_cflag = old_termios->c_cflag; | |
1da177e4 LT |
378 | |
379 | /* Set the baud rate */ | |
3ec466b4 | 380 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { |
1da177e4 | 381 | /* reassert DTR and (maybe) RTS on transition from B0 */ |
b69c1499 | 382 | if ((old_cflag & CBAUD) == B0) { |
1da177e4 LT |
383 | control_state |= (TIOCM_DTR|TIOCM_RTS); |
384 | if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 1) < 0) | |
194343d9 | 385 | dev_err(&port->dev, "Set DTR error\n"); |
1da177e4 | 386 | /* don't set RTS if using hardware flow control */ |
3ec466b4 | 387 | if (!(old_cflag & CRTSCTS)) |
b69c1499 AC |
388 | if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST |
389 | , 1) < 0) | |
194343d9 | 390 | dev_err(&port->dev, "Set RTS error\n"); |
1da177e4 | 391 | } |
9a8baec7 | 392 | } |
1da177e4 | 393 | |
95da310e | 394 | baud = tty_get_baud_rate(tty); |
3ec466b4 AC |
395 | if (baud) { |
396 | urb_value = BELKIN_SA_BAUD(baud); | |
397 | /* Clip to maximum speed */ | |
398 | if (urb_value == 0) | |
399 | urb_value = 1; | |
400 | /* Turn it back into a resulting real baud rate */ | |
401 | baud = BELKIN_SA_BAUD(urb_value); | |
402 | ||
403 | /* Report the actual baud rate back to the caller */ | |
95da310e | 404 | tty_encode_baud_rate(tty, baud, baud); |
9a8baec7 | 405 | if (BSA_USB_CMD(BELKIN_SA_SET_BAUDRATE_REQUEST, urb_value) < 0) |
194343d9 | 406 | dev_err(&port->dev, "Set baudrate error\n"); |
9a8baec7 AC |
407 | } else { |
408 | /* Disable flow control */ | |
b69c1499 AC |
409 | if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, |
410 | BELKIN_SA_FLOW_NONE) < 0) | |
194343d9 | 411 | dev_err(&port->dev, "Disable flowcontrol error\n"); |
9a8baec7 AC |
412 | /* Drop RTS and DTR */ |
413 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
414 | if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 0) < 0) | |
194343d9 | 415 | dev_err(&port->dev, "DTR LOW error\n"); |
9a8baec7 | 416 | if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 0) < 0) |
194343d9 | 417 | dev_err(&port->dev, "RTS LOW error\n"); |
1da177e4 LT |
418 | } |
419 | ||
420 | /* set the parity */ | |
b69c1499 | 421 | if ((cflag ^ old_cflag) & (PARENB | PARODD)) { |
1da177e4 | 422 | if (cflag & PARENB) |
b69c1499 AC |
423 | urb_value = (cflag & PARODD) ? BELKIN_SA_PARITY_ODD |
424 | : BELKIN_SA_PARITY_EVEN; | |
1da177e4 LT |
425 | else |
426 | urb_value = BELKIN_SA_PARITY_NONE; | |
427 | if (BSA_USB_CMD(BELKIN_SA_SET_PARITY_REQUEST, urb_value) < 0) | |
194343d9 | 428 | dev_err(&port->dev, "Set parity error\n"); |
1da177e4 LT |
429 | } |
430 | ||
431 | /* set the number of data bits */ | |
b69c1499 | 432 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
1da177e4 | 433 | switch (cflag & CSIZE) { |
b69c1499 AC |
434 | case CS5: |
435 | urb_value = BELKIN_SA_DATA_BITS(5); | |
436 | break; | |
437 | case CS6: | |
438 | urb_value = BELKIN_SA_DATA_BITS(6); | |
439 | break; | |
440 | case CS7: | |
441 | urb_value = BELKIN_SA_DATA_BITS(7); | |
442 | break; | |
443 | case CS8: | |
444 | urb_value = BELKIN_SA_DATA_BITS(8); | |
445 | break; | |
446 | default: dbg("CSIZE was not CS5-CS8, using default of 8"); | |
447 | urb_value = BELKIN_SA_DATA_BITS(8); | |
448 | break; | |
1da177e4 LT |
449 | } |
450 | if (BSA_USB_CMD(BELKIN_SA_SET_DATA_BITS_REQUEST, urb_value) < 0) | |
194343d9 | 451 | dev_err(&port->dev, "Set data bits error\n"); |
1da177e4 LT |
452 | } |
453 | ||
454 | /* set the number of stop bits */ | |
b69c1499 AC |
455 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { |
456 | urb_value = (cflag & CSTOPB) ? BELKIN_SA_STOP_BITS(2) | |
457 | : BELKIN_SA_STOP_BITS(1); | |
458 | if (BSA_USB_CMD(BELKIN_SA_SET_STOP_BITS_REQUEST, | |
459 | urb_value) < 0) | |
194343d9 | 460 | dev_err(&port->dev, "Set stop bits error\n"); |
1da177e4 LT |
461 | } |
462 | ||
463 | /* Set flow control */ | |
b69c1499 AC |
464 | if (((iflag ^ old_iflag) & (IXOFF | IXON)) || |
465 | ((cflag ^ old_cflag) & CRTSCTS)) { | |
1da177e4 LT |
466 | urb_value = 0; |
467 | if ((iflag & IXOFF) || (iflag & IXON)) | |
468 | urb_value |= (BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON); | |
469 | else | |
470 | urb_value &= ~(BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON); | |
471 | ||
472 | if (cflag & CRTSCTS) | |
473 | urb_value |= (BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS); | |
474 | else | |
475 | urb_value &= ~(BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS); | |
476 | ||
477 | if (bad_flow_control) | |
478 | urb_value &= ~(BELKIN_SA_FLOW_IRTS); | |
479 | ||
480 | if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, urb_value) < 0) | |
194343d9 | 481 | dev_err(&port->dev, "Set flow control error\n"); |
1da177e4 LT |
482 | } |
483 | ||
484 | /* save off the modified port settings */ | |
485 | spin_lock_irqsave(&priv->lock, flags); | |
486 | priv->control_state = control_state; | |
487 | spin_unlock_irqrestore(&priv->lock, flags); | |
488 | } /* belkin_sa_set_termios */ | |
489 | ||
490 | ||
95da310e | 491 | static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 492 | { |
95da310e | 493 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
494 | struct usb_serial *serial = port->serial; |
495 | ||
496 | if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0) | |
194343d9 | 497 | dev_err(&port->dev, "Set break_ctl %d\n", break_state); |
1da177e4 LT |
498 | } |
499 | ||
500 | ||
95da310e | 501 | static int belkin_sa_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 502 | { |
95da310e | 503 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
504 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); |
505 | unsigned long control_state; | |
506 | unsigned long flags; | |
b69c1499 | 507 | |
441b62c1 | 508 | dbg("%s", __func__); |
1da177e4 LT |
509 | |
510 | spin_lock_irqsave(&priv->lock, flags); | |
511 | control_state = priv->control_state; | |
512 | spin_unlock_irqrestore(&priv->lock, flags); | |
513 | ||
514 | return control_state; | |
515 | } | |
516 | ||
517 | ||
95da310e | 518 | static int belkin_sa_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
519 | unsigned int set, unsigned int clear) |
520 | { | |
95da310e | 521 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
522 | struct usb_serial *serial = port->serial; |
523 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); | |
524 | unsigned long control_state; | |
525 | unsigned long flags; | |
526 | int retval; | |
527 | int rts = 0; | |
528 | int dtr = 0; | |
b69c1499 | 529 | |
441b62c1 | 530 | dbg("%s", __func__); |
1da177e4 LT |
531 | |
532 | spin_lock_irqsave(&priv->lock, flags); | |
533 | control_state = priv->control_state; | |
534 | ||
535 | if (set & TIOCM_RTS) { | |
536 | control_state |= TIOCM_RTS; | |
537 | rts = 1; | |
538 | } | |
539 | if (set & TIOCM_DTR) { | |
540 | control_state |= TIOCM_DTR; | |
541 | dtr = 1; | |
542 | } | |
543 | if (clear & TIOCM_RTS) { | |
544 | control_state &= ~TIOCM_RTS; | |
545 | rts = 0; | |
546 | } | |
547 | if (clear & TIOCM_DTR) { | |
548 | control_state &= ~TIOCM_DTR; | |
549 | dtr = 0; | |
550 | } | |
551 | ||
552 | priv->control_state = control_state; | |
553 | spin_unlock_irqrestore(&priv->lock, flags); | |
554 | ||
555 | retval = BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, rts); | |
556 | if (retval < 0) { | |
194343d9 | 557 | dev_err(&port->dev, "Set RTS error %d\n", retval); |
1da177e4 LT |
558 | goto exit; |
559 | } | |
560 | ||
561 | retval = BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, dtr); | |
562 | if (retval < 0) { | |
194343d9 | 563 | dev_err(&port->dev, "Set DTR error %d\n", retval); |
1da177e4 LT |
564 | goto exit; |
565 | } | |
566 | exit: | |
567 | return retval; | |
568 | } | |
569 | ||
570 | ||
95da310e | 571 | static int __init belkin_sa_init(void) |
1da177e4 LT |
572 | { |
573 | int retval; | |
574 | retval = usb_serial_register(&belkin_device); | |
575 | if (retval) | |
576 | goto failed_usb_serial_register; | |
577 | retval = usb_register(&belkin_driver); | |
578 | if (retval) | |
579 | goto failed_usb_register; | |
c197a8db GKH |
580 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
581 | DRIVER_DESC "\n"); | |
1da177e4 LT |
582 | return 0; |
583 | failed_usb_register: | |
584 | usb_serial_deregister(&belkin_device); | |
585 | failed_usb_serial_register: | |
586 | return retval; | |
587 | } | |
588 | ||
589 | ||
590 | static void __exit belkin_sa_exit (void) | |
591 | { | |
b69c1499 | 592 | usb_deregister(&belkin_driver); |
95da310e | 593 | usb_serial_deregister(&belkin_device); |
1da177e4 LT |
594 | } |
595 | ||
596 | ||
b69c1499 AC |
597 | module_init(belkin_sa_init); |
598 | module_exit(belkin_sa_exit); | |
1da177e4 | 599 | |
b69c1499 AC |
600 | MODULE_AUTHOR(DRIVER_AUTHOR); |
601 | MODULE_DESCRIPTION(DRIVER_DESC); | |
602 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
603 | MODULE_LICENSE("GPL"); |
604 | ||
605 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
606 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |