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f7a33e60 BP |
1 | /* |
2 | * usb-serial driver for Quatech USB 2 devices | |
3 | * | |
f88e6a30 BP |
4 | * Copyright (C) 2012 Bill Pemberton (wfp5p@virginia.edu) |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version 2 | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
f7a33e60 BP |
10 | * |
11 | * These devices all have only 1 bulk in and 1 bulk out that is shared | |
12 | * for all serial ports. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <asm/unaligned.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/tty.h> | |
21 | #include <linux/tty_driver.h> | |
22 | #include <linux/tty_flip.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/serial.h> | |
25 | #include <linux/usb.h> | |
26 | #include <linux/usb/serial.h> | |
27 | #include <linux/serial_reg.h> | |
28 | #include <linux/uaccess.h> | |
29 | ||
f7a33e60 BP |
30 | /* default urb timeout for usb operations */ |
31 | #define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT | |
32 | ||
33 | #define QT_OPEN_CLOSE_CHANNEL 0xca | |
34 | #define QT_SET_GET_DEVICE 0xc2 | |
35 | #define QT_SET_GET_REGISTER 0xc0 | |
36 | #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc | |
37 | #define QT_SET_ATF 0xcd | |
38 | #define QT_TRANSFER_IN 0xc0 | |
39 | #define QT_HW_FLOW_CONTROL_MASK 0xc5 | |
40 | #define QT_SW_FLOW_CONTROL_MASK 0xc6 | |
41 | #define QT2_BREAK_CONTROL 0xc8 | |
42 | #define QT2_GET_SET_UART 0xc1 | |
43 | #define QT2_FLUSH_DEVICE 0xc4 | |
44 | #define QT2_GET_SET_QMCR 0xe1 | |
45 | #define QT2_QMCR_RS232 0x40 | |
46 | #define QT2_QMCR_RS422 0x10 | |
47 | ||
48 | #define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS) | |
49 | ||
50 | #define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR) | |
51 | ||
52 | /* status bytes for the device */ | |
53 | #define QT2_CONTROL_BYTE 0x1b | |
54 | #define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */ | |
55 | #define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */ | |
56 | #define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */ | |
57 | #define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */ | |
58 | #define QT2_REC_FLUSH 0x04 /* no following info */ | |
59 | #define QT2_XMIT_FLUSH 0x05 /* no following info */ | |
60 | #define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */ | |
61 | ||
62 | #define MAX_BAUD_RATE 921600 | |
63 | #define DEFAULT_BAUD_RATE 9600 | |
64 | ||
65 | #define QT2_WRITE_BUFFER_SIZE 512 /* size of write buffer */ | |
66 | #define QT2_WRITE_CONTROL_SIZE 5 /* control bytes used for a write */ | |
67 | ||
68 | /* Version Information */ | |
69 | #define DRIVER_VERSION "v0.1" | |
70 | #define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver" | |
71 | ||
72 | #define USB_VENDOR_ID_QUATECH 0x061d | |
73 | #define QUATECH_SSU2_100 0xC120 /* RS232 single port */ | |
74 | #define QUATECH_DSU2_100 0xC140 /* RS232 dual port */ | |
75 | #define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */ | |
76 | #define QUATECH_QSU2_100 0xC160 /* RS232 four port */ | |
77 | #define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */ | |
78 | #define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */ | |
79 | #define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */ | |
80 | ||
81 | struct qt2_device_detail { | |
82 | int product_id; | |
83 | int num_ports; | |
84 | }; | |
85 | ||
86 | #define QT_DETAILS(prod, ports) \ | |
87 | .product_id = (prod), \ | |
88 | .num_ports = (ports) | |
89 | ||
90 | static const struct qt2_device_detail qt2_device_details[] = { | |
91 | {QT_DETAILS(QUATECH_SSU2_100, 1)}, | |
92 | {QT_DETAILS(QUATECH_DSU2_400, 2)}, | |
93 | {QT_DETAILS(QUATECH_DSU2_100, 2)}, | |
94 | {QT_DETAILS(QUATECH_QSU2_400, 4)}, | |
95 | {QT_DETAILS(QUATECH_QSU2_100, 4)}, | |
96 | {QT_DETAILS(QUATECH_ESU2_400, 8)}, | |
97 | {QT_DETAILS(QUATECH_ESU2_100, 8)}, | |
98 | {QT_DETAILS(0, 0)} /* Terminating entry */ | |
99 | }; | |
100 | ||
101 | static const struct usb_device_id id_table[] = { | |
102 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)}, | |
103 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)}, | |
104 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)}, | |
105 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)}, | |
106 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)}, | |
107 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)}, | |
108 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)}, | |
109 | {} /* Terminating entry */ | |
110 | }; | |
111 | MODULE_DEVICE_TABLE(usb, id_table); | |
112 | ||
113 | struct qt2_serial_private { | |
114 | unsigned char current_port; /* current port for incoming data */ | |
115 | ||
116 | struct urb *read_urb; /* shared among all ports */ | |
117 | char read_buffer[512]; | |
118 | }; | |
119 | ||
120 | struct qt2_port_private { | |
121 | bool is_open; | |
122 | u8 device_port; | |
123 | ||
124 | spinlock_t urb_lock; | |
125 | bool urb_in_use; | |
126 | struct urb *write_urb; | |
127 | char write_buffer[QT2_WRITE_BUFFER_SIZE]; | |
128 | ||
129 | spinlock_t lock; | |
130 | u8 shadowLSR; | |
131 | u8 shadowMSR; | |
132 | ||
133 | wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ | |
134 | struct async_icount icount; | |
135 | ||
136 | struct usb_serial_port *port; | |
137 | }; | |
138 | ||
139 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch); | |
140 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch); | |
141 | static void qt2_write_bulk_callback(struct urb *urb); | |
142 | static void qt2_read_bulk_callback(struct urb *urb); | |
143 | ||
144 | static void qt2_release(struct usb_serial *serial) | |
145 | { | |
146 | int i; | |
147 | ||
148 | kfree(usb_get_serial_data(serial)); | |
149 | ||
150 | for (i = 0; i < serial->num_ports; i++) | |
151 | kfree(usb_get_serial_port_data(serial->port[i])); | |
152 | } | |
153 | ||
154 | static inline int calc_baud_divisor(int baudrate) | |
155 | { | |
156 | int divisor, rem; | |
157 | ||
158 | divisor = MAX_BAUD_RATE / baudrate; | |
159 | rem = MAX_BAUD_RATE % baudrate; | |
160 | /* Round to nearest divisor */ | |
161 | if (((rem * 2) >= baudrate) && (baudrate != 110)) | |
162 | divisor++; | |
163 | ||
164 | return divisor; | |
165 | } | |
166 | ||
167 | static inline int qt2_set_port_config(struct usb_device *dev, | |
168 | unsigned char port_number, | |
169 | u16 baudrate, u16 lcr) | |
170 | { | |
171 | int divisor = calc_baud_divisor(baudrate); | |
172 | u16 index = ((u16) (lcr << 8) | (u16) (port_number)); | |
173 | ||
174 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
175 | QT2_GET_SET_UART, 0x40, | |
176 | divisor, index, NULL, 0, QT2_USB_TIMEOUT); | |
177 | } | |
178 | ||
179 | static inline int qt2_control_msg(struct usb_device *dev, | |
180 | u8 request, u16 data, u16 index) | |
181 | { | |
182 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
183 | request, 0x40, data, index, | |
184 | NULL, 0, QT2_USB_TIMEOUT); | |
185 | } | |
186 | ||
187 | static inline int qt2_setdevice(struct usb_device *dev, u8 *data) | |
188 | { | |
189 | u16 x = ((u16) (data[1] << 8) | (u16) (data[0])); | |
190 | ||
191 | return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
192 | } | |
193 | ||
194 | ||
195 | static inline int qt2_getdevice(struct usb_device *dev, u8 *data) | |
196 | { | |
197 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
198 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
199 | data, 3, QT2_USB_TIMEOUT); | |
200 | } | |
201 | ||
202 | static inline int qt2_getregister(struct usb_device *dev, | |
203 | u8 uart, | |
204 | u8 reg, | |
205 | u8 *data) | |
206 | { | |
207 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
208 | QT_SET_GET_REGISTER, 0xc0, reg, | |
209 | uart, data, sizeof(*data), QT2_USB_TIMEOUT); | |
210 | ||
211 | } | |
212 | ||
213 | static inline int qt2_setregister(struct usb_device *dev, | |
214 | u8 uart, u8 reg, u16 data) | |
215 | { | |
216 | u16 value = (data << 8) | reg; | |
217 | ||
218 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
219 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
220 | NULL, 0, QT2_USB_TIMEOUT); | |
221 | } | |
222 | ||
223 | static inline int update_mctrl(struct qt2_port_private *port_priv, | |
224 | unsigned int set, unsigned int clear) | |
225 | { | |
226 | struct usb_serial_port *port = port_priv->port; | |
227 | struct usb_device *dev = port->serial->dev; | |
228 | unsigned urb_value; | |
229 | int status; | |
230 | ||
231 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
232 | dev_dbg(&port->dev, | |
233 | "update_mctrl - DTR|RTS not being set|cleared\n"); | |
234 | return 0; /* no change */ | |
235 | } | |
236 | ||
237 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
238 | urb_value = 0; | |
239 | if (set & TIOCM_DTR) | |
240 | urb_value |= UART_MCR_DTR; | |
241 | if (set & TIOCM_RTS) | |
242 | urb_value |= UART_MCR_RTS; | |
243 | ||
244 | status = qt2_setregister(dev, port_priv->device_port, UART_MCR, | |
245 | urb_value); | |
246 | if (status < 0) | |
247 | dev_err(&port->dev, | |
248 | "update_mctrl - Error from MODEM_CTRL urb: %i\n", | |
249 | status); | |
250 | return status; | |
251 | } | |
252 | ||
253 | static int qt2_calc_num_ports(struct usb_serial *serial) | |
254 | { | |
255 | struct qt2_device_detail d; | |
256 | int i; | |
257 | ||
258 | for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) { | |
259 | if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct)) | |
260 | return d.num_ports; | |
261 | } | |
262 | ||
263 | /* we didn't recognize the device */ | |
264 | dev_err(&serial->dev->dev, | |
265 | "don't know the number of ports, assuming 1\n"); | |
266 | ||
267 | return 1; | |
268 | } | |
269 | ||
270 | static void qt2_set_termios(struct tty_struct *tty, | |
271 | struct usb_serial_port *port, | |
272 | struct ktermios *old_termios) | |
273 | { | |
274 | struct usb_device *dev = port->serial->dev; | |
275 | struct qt2_port_private *port_priv; | |
adc8d746 | 276 | struct ktermios *termios = &tty->termios; |
f7a33e60 BP |
277 | u16 baud; |
278 | unsigned int cflag = termios->c_cflag; | |
279 | u16 new_lcr = 0; | |
280 | int status; | |
281 | ||
282 | port_priv = usb_get_serial_port_data(port); | |
283 | ||
284 | if (cflag & PARENB) { | |
285 | if (cflag & PARODD) | |
286 | new_lcr |= UART_LCR_PARITY; | |
287 | else | |
288 | new_lcr |= SERIAL_EVEN_PARITY; | |
289 | } | |
290 | ||
291 | switch (cflag & CSIZE) { | |
292 | case CS5: | |
293 | new_lcr |= UART_LCR_WLEN5; | |
294 | break; | |
295 | case CS6: | |
296 | new_lcr |= UART_LCR_WLEN6; | |
297 | break; | |
298 | case CS7: | |
299 | new_lcr |= UART_LCR_WLEN7; | |
300 | break; | |
301 | default: | |
302 | case CS8: | |
303 | new_lcr |= UART_LCR_WLEN8; | |
304 | break; | |
305 | } | |
306 | ||
307 | baud = tty_get_baud_rate(tty); | |
308 | if (!baud) | |
309 | baud = 9600; | |
310 | ||
311 | status = qt2_set_port_config(dev, port_priv->device_port, baud, | |
312 | new_lcr); | |
313 | if (status < 0) | |
314 | dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n", | |
315 | __func__, status); | |
316 | ||
317 | if (cflag & CRTSCTS) | |
318 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
319 | SERIAL_CRTSCTS, | |
320 | port_priv->device_port); | |
321 | else | |
322 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
323 | 0, port_priv->device_port); | |
324 | if (status < 0) | |
325 | dev_err(&port->dev, "%s - set HW flow control failed: %i\n", | |
326 | __func__, status); | |
327 | ||
328 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
329 | u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty))); | |
330 | ||
331 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
332 | x, port_priv->device_port); | |
333 | } else | |
334 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
335 | 0, port_priv->device_port); | |
336 | ||
337 | if (status < 0) | |
338 | dev_err(&port->dev, "%s - set SW flow control failed: %i\n", | |
339 | __func__, status); | |
340 | ||
341 | } | |
342 | ||
343 | static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) | |
344 | { | |
345 | struct usb_serial *serial; | |
f7a33e60 BP |
346 | struct qt2_port_private *port_priv; |
347 | u8 *data; | |
348 | u16 device_port; | |
349 | int status; | |
350 | unsigned long flags; | |
351 | ||
352 | device_port = (u16) (port->number - port->serial->minor); | |
353 | ||
354 | serial = port->serial; | |
355 | ||
356 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
357 | |
358 | /* set the port to RS232 mode */ | |
359 | status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR, | |
360 | QT2_QMCR_RS232, device_port); | |
361 | if (status < 0) { | |
362 | dev_err(&port->dev, | |
363 | "%s failed to set RS232 mode for port %i error %i\n", | |
364 | __func__, device_port, status); | |
365 | return status; | |
366 | } | |
367 | ||
368 | data = kzalloc(2, GFP_KERNEL); | |
369 | if (!data) | |
370 | return -ENOMEM; | |
371 | ||
372 | /* open the port */ | |
373 | status = usb_control_msg(serial->dev, | |
374 | usb_rcvctrlpipe(serial->dev, 0), | |
375 | QT_OPEN_CLOSE_CHANNEL, | |
376 | 0xc0, 0, | |
377 | device_port, data, 2, QT2_USB_TIMEOUT); | |
378 | ||
379 | if (status < 0) { | |
380 | dev_err(&port->dev, "%s - open port failed %i", __func__, | |
381 | status); | |
382 | kfree(data); | |
383 | return status; | |
384 | } | |
385 | ||
386 | spin_lock_irqsave(&port_priv->lock, flags); | |
387 | port_priv->shadowLSR = data[0]; | |
388 | port_priv->shadowMSR = data[1]; | |
389 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
390 | ||
391 | kfree(data); | |
392 | ||
393 | /* set to default speed and 8bit word size */ | |
394 | status = qt2_set_port_config(serial->dev, device_port, | |
395 | DEFAULT_BAUD_RATE, UART_LCR_WLEN8); | |
396 | if (status < 0) { | |
397 | dev_err(&port->dev, | |
398 | "%s - initial setup failed for port %i (%i)\n", | |
399 | __func__, port->number, device_port); | |
400 | return status; | |
401 | } | |
402 | ||
403 | port_priv->is_open = true; | |
404 | port_priv->device_port = (u8) device_port; | |
405 | ||
406 | if (tty) | |
adc8d746 | 407 | qt2_set_termios(tty, port, &tty->termios); |
f7a33e60 BP |
408 | |
409 | return 0; | |
410 | ||
411 | } | |
412 | ||
413 | static void qt2_close(struct usb_serial_port *port) | |
414 | { | |
415 | struct usb_serial *serial; | |
f7a33e60 BP |
416 | struct qt2_port_private *port_priv; |
417 | unsigned long flags; | |
418 | int i; | |
419 | ||
420 | serial = port->serial; | |
f7a33e60 BP |
421 | port_priv = usb_get_serial_port_data(port); |
422 | ||
423 | port_priv->is_open = false; | |
424 | ||
425 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
426 | if (port_priv->write_urb->status == -EINPROGRESS) | |
427 | usb_kill_urb(port_priv->write_urb); | |
428 | port_priv->urb_in_use = false; | |
429 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
430 | ||
431 | /* flush the port transmit buffer */ | |
432 | i = usb_control_msg(serial->dev, | |
433 | usb_rcvctrlpipe(serial->dev, 0), | |
434 | QT2_FLUSH_DEVICE, 0x40, 1, | |
435 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
436 | ||
437 | if (i < 0) | |
438 | dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n", | |
439 | __func__, i); | |
440 | ||
441 | /* flush the port receive buffer */ | |
442 | i = usb_control_msg(serial->dev, | |
443 | usb_rcvctrlpipe(serial->dev, 0), | |
444 | QT2_FLUSH_DEVICE, 0x40, 0, | |
445 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
446 | ||
447 | if (i < 0) | |
448 | dev_err(&port->dev, "%s - receive buffer flush failed: %i\n", | |
449 | __func__, i); | |
450 | ||
451 | /* close the port */ | |
452 | i = usb_control_msg(serial->dev, | |
453 | usb_sndctrlpipe(serial->dev, 0), | |
454 | QT_OPEN_CLOSE_CHANNEL, | |
455 | 0x40, 0, | |
456 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
457 | ||
458 | if (i < 0) | |
459 | dev_err(&port->dev, "%s - close port failed %i\n", | |
460 | __func__, i); | |
461 | ||
462 | } | |
463 | ||
464 | static void qt2_disconnect(struct usb_serial *serial) | |
465 | { | |
466 | struct qt2_serial_private *serial_priv = usb_get_serial_data(serial); | |
467 | struct qt2_port_private *port_priv; | |
468 | int i; | |
469 | ||
470 | if (serial_priv->read_urb->status == -EINPROGRESS) | |
471 | usb_kill_urb(serial_priv->read_urb); | |
472 | ||
473 | usb_free_urb(serial_priv->read_urb); | |
474 | ||
475 | for (i = 0; i < serial->num_ports; i++) { | |
476 | port_priv = usb_get_serial_port_data(serial->port[i]); | |
477 | ||
478 | if (port_priv->write_urb->status == -EINPROGRESS) | |
479 | usb_kill_urb(port_priv->write_urb); | |
480 | usb_free_urb(port_priv->write_urb); | |
481 | } | |
482 | } | |
483 | ||
484 | static int get_serial_info(struct usb_serial_port *port, | |
485 | struct serial_struct __user *retinfo) | |
486 | { | |
487 | struct serial_struct tmp; | |
488 | ||
489 | if (!retinfo) | |
490 | return -EFAULT; | |
491 | ||
492 | memset(&tmp, 0, sizeof(tmp)); | |
493 | tmp.line = port->serial->minor; | |
494 | tmp.port = 0; | |
495 | tmp.irq = 0; | |
496 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
497 | tmp.xmit_fifo_size = port->bulk_out_size; | |
498 | tmp.baud_base = 9600; | |
499 | tmp.close_delay = 5*HZ; | |
500 | tmp.closing_wait = 30*HZ; | |
501 | ||
502 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
503 | return -EFAULT; | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) | |
508 | { | |
509 | struct qt2_port_private *priv = usb_get_serial_port_data(port); | |
510 | struct async_icount prev, cur; | |
511 | unsigned long flags; | |
512 | ||
513 | spin_lock_irqsave(&priv->lock, flags); | |
514 | prev = priv->icount; | |
515 | spin_unlock_irqrestore(&priv->lock, flags); | |
516 | ||
517 | while (1) { | |
518 | wait_event_interruptible(priv->delta_msr_wait, | |
519 | ((priv->icount.rng != prev.rng) || | |
520 | (priv->icount.dsr != prev.dsr) || | |
521 | (priv->icount.dcd != prev.dcd) || | |
522 | (priv->icount.cts != prev.cts))); | |
523 | ||
524 | if (signal_pending(current)) | |
525 | return -ERESTARTSYS; | |
526 | ||
527 | spin_lock_irqsave(&priv->lock, flags); | |
528 | cur = priv->icount; | |
529 | spin_unlock_irqrestore(&priv->lock, flags); | |
530 | ||
531 | if ((prev.rng == cur.rng) && | |
532 | (prev.dsr == cur.dsr) && | |
533 | (prev.dcd == cur.dcd) && | |
534 | (prev.cts == cur.cts)) | |
535 | return -EIO; | |
536 | ||
537 | if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) || | |
538 | (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) || | |
539 | (arg & TIOCM_CD && (prev.dcd != cur.dcd)) || | |
540 | (arg & TIOCM_CTS && (prev.cts != cur.cts))) | |
541 | return 0; | |
542 | } | |
543 | return 0; | |
544 | } | |
545 | ||
546 | static int qt2_get_icount(struct tty_struct *tty, | |
547 | struct serial_icounter_struct *icount) | |
548 | { | |
549 | struct usb_serial_port *port = tty->driver_data; | |
550 | struct qt2_port_private *priv = usb_get_serial_port_data(port); | |
551 | struct async_icount cnow = priv->icount; | |
552 | ||
553 | icount->cts = cnow.cts; | |
554 | icount->dsr = cnow.dsr; | |
555 | icount->rng = cnow.rng; | |
556 | icount->dcd = cnow.dcd; | |
557 | icount->rx = cnow.rx; | |
558 | icount->tx = cnow.tx; | |
559 | icount->frame = cnow.frame; | |
560 | icount->overrun = cnow.overrun; | |
561 | icount->parity = cnow.parity; | |
562 | icount->brk = cnow.brk; | |
563 | icount->buf_overrun = cnow.buf_overrun; | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | static int qt2_ioctl(struct tty_struct *tty, | |
569 | unsigned int cmd, unsigned long arg) | |
570 | { | |
571 | struct usb_serial_port *port = tty->driver_data; | |
572 | ||
573 | switch (cmd) { | |
574 | case TIOCGSERIAL: | |
575 | return get_serial_info(port, | |
576 | (struct serial_struct __user *)arg); | |
577 | ||
578 | case TIOCMIWAIT: | |
579 | return wait_modem_info(port, arg); | |
580 | ||
581 | default: | |
582 | break; | |
583 | } | |
584 | ||
585 | return -ENOIOCTLCMD; | |
586 | } | |
587 | ||
588 | static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) | |
589 | { | |
590 | switch (*ch) { | |
591 | case QT2_LINE_STATUS: | |
592 | qt2_update_lsr(port, ch + 1); | |
593 | break; | |
594 | case QT2_MODEM_STATUS: | |
595 | qt2_update_msr(port, ch + 1); | |
596 | break; | |
597 | } | |
598 | } | |
599 | ||
600 | /* not needed, kept to document functionality */ | |
601 | static void qt2_process_xmit_empty(struct usb_serial_port *port, | |
602 | unsigned char *ch) | |
603 | { | |
604 | int bytes_written; | |
605 | ||
606 | bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4); | |
607 | } | |
608 | ||
609 | /* not needed, kept to document functionality */ | |
610 | static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch) | |
611 | { | |
612 | return; | |
613 | } | |
614 | ||
615 | void qt2_process_read_urb(struct urb *urb) | |
616 | { | |
617 | struct usb_serial *serial; | |
618 | struct qt2_serial_private *serial_priv; | |
619 | struct usb_serial_port *port; | |
620 | struct qt2_port_private *port_priv; | |
621 | struct tty_struct *tty; | |
622 | bool escapeflag; | |
623 | unsigned char *ch; | |
624 | int i; | |
625 | unsigned char newport; | |
626 | int len = urb->actual_length; | |
627 | ||
628 | if (!len) | |
629 | return; | |
630 | ||
631 | ch = urb->transfer_buffer; | |
632 | tty = NULL; | |
633 | serial = urb->context; | |
634 | serial_priv = usb_get_serial_data(serial); | |
635 | port = serial->port[serial_priv->current_port]; | |
636 | port_priv = usb_get_serial_port_data(port); | |
637 | ||
638 | if (port_priv->is_open) | |
639 | tty = tty_port_tty_get(&port->port); | |
640 | ||
641 | for (i = 0; i < urb->actual_length; i++) { | |
642 | ch = (unsigned char *)urb->transfer_buffer + i; | |
643 | if ((i <= (len - 3)) && | |
644 | (*ch == QT2_CONTROL_BYTE) && | |
645 | (*(ch + 1) == QT2_CONTROL_BYTE)) { | |
646 | escapeflag = false; | |
647 | switch (*(ch + 2)) { | |
648 | case QT2_LINE_STATUS: | |
649 | case QT2_MODEM_STATUS: | |
650 | if (i > (len - 4)) { | |
651 | dev_warn(&port->dev, | |
652 | "%s - status message too short\n", | |
653 | __func__); | |
654 | break; | |
655 | } | |
656 | qt2_process_status(port, ch + 2); | |
657 | i += 3; | |
658 | escapeflag = true; | |
659 | break; | |
660 | case QT2_XMIT_HOLD: | |
661 | if (i > (len - 5)) { | |
662 | dev_warn(&port->dev, | |
663 | "%s - xmit_empty message too short\n", | |
664 | __func__); | |
665 | break; | |
666 | } | |
667 | qt2_process_xmit_empty(port, ch + 3); | |
668 | i += 4; | |
669 | escapeflag = true; | |
670 | break; | |
671 | case QT2_CHANGE_PORT: | |
672 | if (i > (len - 4)) { | |
673 | dev_warn(&port->dev, | |
674 | "%s - change_port message too short\n", | |
675 | __func__); | |
676 | break; | |
677 | } | |
678 | if (tty) { | |
679 | tty_flip_buffer_push(tty); | |
680 | tty_kref_put(tty); | |
681 | } | |
682 | ||
683 | newport = *(ch + 3); | |
684 | ||
685 | if (newport > serial->num_ports) { | |
686 | dev_err(&port->dev, | |
687 | "%s - port change to invalid port: %i\n", | |
688 | __func__, newport); | |
689 | break; | |
690 | } | |
691 | ||
692 | serial_priv->current_port = newport; | |
693 | port = serial->port[serial_priv->current_port]; | |
694 | port_priv = usb_get_serial_port_data(port); | |
695 | if (port_priv->is_open) | |
696 | tty = tty_port_tty_get(&port->port); | |
697 | else | |
698 | tty = NULL; | |
699 | i += 3; | |
700 | escapeflag = true; | |
701 | break; | |
702 | case QT2_REC_FLUSH: | |
703 | case QT2_XMIT_FLUSH: | |
704 | qt2_process_flush(port, ch + 2); | |
705 | i += 2; | |
706 | escapeflag = true; | |
707 | break; | |
708 | case QT2_CONTROL_ESCAPE: | |
709 | tty_buffer_request_room(tty, 2); | |
710 | tty_insert_flip_string(tty, ch, 2); | |
711 | i += 2; | |
712 | escapeflag = true; | |
713 | break; | |
714 | default: | |
715 | dev_warn(&port->dev, | |
716 | "%s - unsupported command %i\n", | |
717 | __func__, *(ch + 2)); | |
718 | break; | |
719 | } | |
720 | if (escapeflag) | |
721 | continue; | |
722 | } | |
723 | ||
724 | if (tty) { | |
725 | tty_buffer_request_room(tty, 1); | |
726 | tty_insert_flip_string(tty, ch, 1); | |
727 | } | |
728 | } | |
729 | ||
730 | if (tty) { | |
731 | tty_flip_buffer_push(tty); | |
732 | tty_kref_put(tty); | |
733 | } | |
734 | } | |
735 | ||
736 | static void qt2_write_bulk_callback(struct urb *urb) | |
737 | { | |
738 | struct usb_serial_port *port; | |
739 | struct qt2_port_private *port_priv; | |
740 | ||
741 | port = urb->context; | |
742 | port_priv = usb_get_serial_port_data(port); | |
743 | ||
744 | spin_lock(&port_priv->urb_lock); | |
745 | ||
746 | port_priv->urb_in_use = false; | |
747 | usb_serial_port_softint(port); | |
748 | ||
749 | spin_unlock(&port_priv->urb_lock); | |
750 | ||
751 | } | |
752 | ||
753 | static void qt2_read_bulk_callback(struct urb *urb) | |
754 | { | |
755 | struct usb_serial *serial = urb->context; | |
756 | int status; | |
757 | ||
758 | if (urb->status) { | |
759 | dev_warn(&serial->dev->dev, | |
760 | "%s - non-zero urb status: %i\n", __func__, | |
761 | urb->status); | |
762 | return; | |
763 | } | |
764 | ||
765 | qt2_process_read_urb(urb); | |
766 | ||
767 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
768 | if (status != 0) | |
769 | dev_err(&serial->dev->dev, | |
770 | "%s - resubmit read urb failed: %i\n", | |
771 | __func__, status); | |
772 | } | |
773 | ||
774 | static int qt2_setup_urbs(struct usb_serial *serial) | |
775 | { | |
776 | struct usb_serial_port *port; | |
777 | struct usb_serial_port *port0; | |
778 | struct qt2_serial_private *serial_priv; | |
779 | struct qt2_port_private *port_priv; | |
780 | int pcount, status; | |
781 | ||
782 | port0 = serial->port[0]; | |
783 | ||
784 | serial_priv = usb_get_serial_data(serial); | |
785 | serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
786 | if (!serial_priv->read_urb) { | |
787 | dev_err(&serial->dev->dev, "No free urbs available\n"); | |
788 | return -ENOMEM; | |
789 | } | |
790 | ||
791 | usb_fill_bulk_urb(serial_priv->read_urb, serial->dev, | |
792 | usb_rcvbulkpipe(serial->dev, | |
793 | port0->bulk_in_endpointAddress), | |
794 | serial_priv->read_buffer, | |
795 | sizeof(serial_priv->read_buffer), | |
796 | qt2_read_bulk_callback, serial); | |
797 | ||
798 | /* setup write_urb for each port */ | |
799 | for (pcount = 0; pcount < serial->num_ports; pcount++) { | |
800 | ||
801 | port = serial->port[pcount]; | |
802 | port_priv = usb_get_serial_port_data(port); | |
803 | ||
804 | port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
805 | if (!port_priv->write_urb) { | |
806 | dev_err(&serial->dev->dev, | |
807 | "failed to alloc write_urb for port %i\n", | |
808 | pcount); | |
809 | return -ENOMEM; | |
810 | } | |
811 | ||
812 | usb_fill_bulk_urb(port_priv->write_urb, | |
813 | serial->dev, | |
814 | usb_sndbulkpipe(serial->dev, | |
815 | port0-> | |
816 | bulk_out_endpointAddress), | |
817 | port_priv->write_buffer, | |
818 | sizeof(port_priv->write_buffer), | |
819 | qt2_write_bulk_callback, port); | |
820 | } | |
821 | ||
822 | status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL); | |
823 | if (status != 0) { | |
824 | dev_err(&serial->dev->dev, | |
825 | "%s - submit read urb failed %i\n", __func__, status); | |
b8a00550 | 826 | usb_free_urb(serial_priv->read_urb); |
f7a33e60 BP |
827 | return status; |
828 | } | |
829 | ||
830 | return 0; | |
831 | ||
832 | } | |
833 | ||
834 | static int qt2_attach(struct usb_serial *serial) | |
835 | { | |
836 | struct qt2_serial_private *serial_priv; | |
837 | struct qt2_port_private *port_priv; | |
838 | int status, pcount; | |
839 | ||
840 | /* power on unit */ | |
841 | status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
842 | 0xc2, 0x40, 0x8000, 0, NULL, 0, | |
843 | QT2_USB_TIMEOUT); | |
844 | if (status < 0) { | |
845 | dev_err(&serial->dev->dev, | |
846 | "%s - failed to power on unit: %i\n", __func__, status); | |
847 | return status; | |
848 | } | |
849 | ||
850 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
851 | if (!serial_priv) { | |
852 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
853 | return -ENOMEM; | |
854 | } | |
855 | ||
856 | usb_set_serial_data(serial, serial_priv); | |
857 | ||
858 | for (pcount = 0; pcount < serial->num_ports; pcount++) { | |
859 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); | |
860 | if (!port_priv) { | |
861 | dev_err(&serial->dev->dev, | |
862 | "%s- kmalloc(%Zd) failed.\n", __func__, | |
863 | sizeof(*port_priv)); | |
864 | pcount--; | |
865 | status = -ENOMEM; | |
866 | goto attach_failed; | |
867 | } | |
868 | ||
869 | spin_lock_init(&port_priv->lock); | |
870 | spin_lock_init(&port_priv->urb_lock); | |
871 | init_waitqueue_head(&port_priv->delta_msr_wait); | |
872 | ||
873 | port_priv->port = serial->port[pcount]; | |
874 | ||
875 | usb_set_serial_port_data(serial->port[pcount], port_priv); | |
876 | } | |
877 | ||
878 | status = qt2_setup_urbs(serial); | |
879 | if (status != 0) | |
880 | goto attach_failed; | |
881 | ||
882 | return 0; | |
883 | ||
884 | attach_failed: | |
885 | for (/* empty */; pcount >= 0; pcount--) { | |
886 | port_priv = usb_get_serial_port_data(serial->port[pcount]); | |
887 | kfree(port_priv); | |
888 | } | |
889 | kfree(serial_priv); | |
890 | return status; | |
891 | } | |
892 | ||
893 | static int qt2_tiocmget(struct tty_struct *tty) | |
894 | { | |
895 | struct usb_serial_port *port = tty->driver_data; | |
896 | struct usb_device *dev = port->serial->dev; | |
897 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
898 | u8 *d; | |
899 | int r; | |
900 | ||
901 | d = kzalloc(2, GFP_KERNEL); | |
902 | if (!d) | |
903 | return -ENOMEM; | |
904 | ||
905 | r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d); | |
906 | if (r < 0) | |
907 | goto mget_out; | |
908 | ||
909 | r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1); | |
910 | if (r < 0) | |
911 | goto mget_out; | |
912 | ||
913 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | | |
914 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
915 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
916 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
917 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
918 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
919 | ||
920 | mget_out: | |
921 | kfree(d); | |
922 | return r; | |
923 | } | |
924 | ||
925 | static int qt2_tiocmset(struct tty_struct *tty, | |
926 | unsigned int set, unsigned int clear) | |
927 | { | |
928 | struct qt2_port_private *port_priv; | |
929 | ||
930 | port_priv = usb_get_serial_port_data(tty->driver_data); | |
931 | return update_mctrl(port_priv, set, clear); | |
932 | } | |
933 | ||
934 | static void qt2_break_ctl(struct tty_struct *tty, int break_state) | |
935 | { | |
936 | struct usb_serial_port *port = tty->driver_data; | |
937 | struct qt2_port_private *port_priv; | |
938 | int status; | |
939 | u16 val; | |
940 | ||
941 | port_priv = usb_get_serial_port_data(port); | |
942 | ||
943 | if (!port_priv->is_open) { | |
944 | dev_err(&port->dev, | |
945 | "%s - port is not open\n", __func__); | |
946 | return; | |
947 | } | |
948 | ||
949 | val = (break_state == -1) ? 1 : 0; | |
950 | ||
951 | status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL, | |
952 | val, port_priv->device_port); | |
953 | if (status < 0) | |
954 | dev_warn(&port->dev, | |
955 | "%s - failed to send control message: %i\n", __func__, | |
956 | status); | |
957 | } | |
958 | ||
959 | ||
960 | ||
961 | static void qt2_dtr_rts(struct usb_serial_port *port, int on) | |
962 | { | |
963 | struct usb_device *dev = port->serial->dev; | |
964 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
965 | ||
966 | mutex_lock(&port->serial->disc_mutex); | |
967 | if (!port->serial->disconnected) { | |
968 | /* Disable flow control */ | |
969 | if (!on && qt2_setregister(dev, port_priv->device_port, | |
970 | UART_MCR, 0) < 0) | |
971 | dev_warn(&port->dev, "error from flowcontrol urb\n"); | |
972 | /* drop RTS and DTR */ | |
973 | if (on) | |
974 | update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0); | |
975 | else | |
976 | update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS); | |
977 | } | |
978 | mutex_unlock(&port->serial->disc_mutex); | |
979 | } | |
980 | ||
981 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch) | |
982 | { | |
983 | struct qt2_port_private *port_priv; | |
984 | u8 newMSR = (u8) *ch; | |
985 | unsigned long flags; | |
986 | ||
987 | port_priv = usb_get_serial_port_data(port); | |
988 | ||
989 | spin_lock_irqsave(&port_priv->lock, flags); | |
990 | port_priv->shadowMSR = newMSR; | |
991 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
992 | ||
993 | if (newMSR & UART_MSR_ANY_DELTA) { | |
994 | /* update input line counters */ | |
995 | if (newMSR & UART_MSR_DCTS) | |
996 | port_priv->icount.cts++; | |
997 | ||
998 | if (newMSR & UART_MSR_DDSR) | |
999 | port_priv->icount.dsr++; | |
1000 | ||
1001 | if (newMSR & UART_MSR_DDCD) | |
1002 | port_priv->icount.dcd++; | |
1003 | ||
1004 | if (newMSR & UART_MSR_TERI) | |
1005 | port_priv->icount.rng++; | |
1006 | ||
1007 | wake_up_interruptible(&port_priv->delta_msr_wait); | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch) | |
1012 | { | |
1013 | struct qt2_port_private *port_priv; | |
1014 | struct async_icount *icount; | |
1015 | unsigned long flags; | |
1016 | u8 newLSR = (u8) *ch; | |
1017 | ||
1018 | port_priv = usb_get_serial_port_data(port); | |
1019 | ||
1020 | if (newLSR & UART_LSR_BI) | |
1021 | newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI); | |
1022 | ||
1023 | spin_lock_irqsave(&port_priv->lock, flags); | |
1024 | port_priv->shadowLSR = newLSR; | |
1025 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
1026 | ||
1027 | icount = &port_priv->icount; | |
1028 | ||
1029 | if (newLSR & UART_LSR_BRK_ERROR_BITS) { | |
1030 | ||
1031 | if (newLSR & UART_LSR_BI) | |
1032 | icount->brk++; | |
1033 | ||
1034 | if (newLSR & UART_LSR_OE) | |
1035 | icount->overrun++; | |
1036 | ||
1037 | if (newLSR & UART_LSR_PE) | |
1038 | icount->parity++; | |
1039 | ||
1040 | if (newLSR & UART_LSR_FE) | |
1041 | icount->frame++; | |
1042 | } | |
1043 | ||
1044 | } | |
1045 | ||
1046 | static int qt2_write_room(struct tty_struct *tty) | |
1047 | { | |
1048 | struct usb_serial_port *port = tty->driver_data; | |
1049 | struct qt2_port_private *port_priv; | |
1050 | unsigned long flags = 0; | |
1051 | int r; | |
1052 | ||
1053 | port_priv = usb_get_serial_port_data(port); | |
1054 | ||
1055 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
1056 | ||
1057 | if (port_priv->urb_in_use) | |
1058 | r = 0; | |
1059 | else | |
1060 | r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE; | |
1061 | ||
1062 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
1063 | ||
1064 | return r; | |
1065 | } | |
1066 | ||
1067 | static int qt2_write(struct tty_struct *tty, | |
1068 | struct usb_serial_port *port, | |
1069 | const unsigned char *buf, int count) | |
1070 | { | |
1071 | struct qt2_port_private *port_priv; | |
1072 | struct urb *write_urb; | |
1073 | unsigned char *data; | |
1074 | unsigned long flags; | |
1075 | int status; | |
1076 | int bytes_out = 0; | |
1077 | ||
1078 | port_priv = usb_get_serial_port_data(port); | |
1079 | ||
1080 | if (port_priv->write_urb == NULL) { | |
1081 | dev_err(&port->dev, "%s - no output urb\n", __func__); | |
1082 | return 0; | |
1083 | } | |
1084 | write_urb = port_priv->write_urb; | |
1085 | ||
1086 | count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE); | |
1087 | ||
1088 | data = write_urb->transfer_buffer; | |
1089 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
1090 | if (port_priv->urb_in_use == true) { | |
788a661a | 1091 | dev_err(&port->dev, "qt2_write - urb is in use\n"); |
f7a33e60 BP |
1092 | goto write_out; |
1093 | } | |
1094 | ||
1095 | *data++ = QT2_CONTROL_BYTE; | |
1096 | *data++ = QT2_CONTROL_BYTE; | |
1097 | *data++ = port_priv->device_port; | |
1098 | put_unaligned_le16(count, data); | |
1099 | data += 2; | |
1100 | memcpy(data, buf, count); | |
1101 | ||
1102 | write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE; | |
1103 | ||
1104 | status = usb_submit_urb(write_urb, GFP_ATOMIC); | |
1105 | if (status == 0) { | |
1106 | port_priv->urb_in_use = true; | |
1107 | bytes_out += count; | |
1108 | } | |
1109 | ||
1110 | write_out: | |
1111 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
1112 | return bytes_out; | |
1113 | } | |
1114 | ||
1115 | ||
1116 | static struct usb_serial_driver qt2_device = { | |
1117 | .driver = { | |
1118 | .owner = THIS_MODULE, | |
1119 | .name = "quatech-serial", | |
1120 | }, | |
1121 | .description = DRIVER_DESC, | |
1122 | .id_table = id_table, | |
1123 | .open = qt2_open, | |
1124 | .close = qt2_close, | |
1125 | .write = qt2_write, | |
1126 | .write_room = qt2_write_room, | |
1127 | .calc_num_ports = qt2_calc_num_ports, | |
1128 | .attach = qt2_attach, | |
1129 | .release = qt2_release, | |
1130 | .disconnect = qt2_disconnect, | |
1131 | .dtr_rts = qt2_dtr_rts, | |
1132 | .break_ctl = qt2_break_ctl, | |
1133 | .tiocmget = qt2_tiocmget, | |
1134 | .tiocmset = qt2_tiocmset, | |
1135 | .get_icount = qt2_get_icount, | |
1136 | .ioctl = qt2_ioctl, | |
1137 | .set_termios = qt2_set_termios, | |
1138 | }; | |
1139 | ||
1140 | static struct usb_serial_driver *const serial_drivers[] = { | |
1141 | &qt2_device, NULL | |
1142 | }; | |
1143 | ||
1144 | module_usb_serial_driver(serial_drivers, id_table); | |
1145 | ||
1146 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1147 | MODULE_LICENSE("GPL"); |