Commit | Line | Data |
---|---|---|
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 | ||
30 | static bool debug; | |
31 | ||
32 | /* default urb timeout for usb operations */ | |
33 | #define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT | |
34 | ||
35 | #define QT_OPEN_CLOSE_CHANNEL 0xca | |
36 | #define QT_SET_GET_DEVICE 0xc2 | |
37 | #define QT_SET_GET_REGISTER 0xc0 | |
38 | #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc | |
39 | #define QT_SET_ATF 0xcd | |
40 | #define QT_TRANSFER_IN 0xc0 | |
41 | #define QT_HW_FLOW_CONTROL_MASK 0xc5 | |
42 | #define QT_SW_FLOW_CONTROL_MASK 0xc6 | |
43 | #define QT2_BREAK_CONTROL 0xc8 | |
44 | #define QT2_GET_SET_UART 0xc1 | |
45 | #define QT2_FLUSH_DEVICE 0xc4 | |
46 | #define QT2_GET_SET_QMCR 0xe1 | |
47 | #define QT2_QMCR_RS232 0x40 | |
48 | #define QT2_QMCR_RS422 0x10 | |
49 | ||
50 | #define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS) | |
51 | ||
52 | #define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR) | |
53 | ||
54 | /* status bytes for the device */ | |
55 | #define QT2_CONTROL_BYTE 0x1b | |
56 | #define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */ | |
57 | #define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */ | |
58 | #define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */ | |
59 | #define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */ | |
60 | #define QT2_REC_FLUSH 0x04 /* no following info */ | |
61 | #define QT2_XMIT_FLUSH 0x05 /* no following info */ | |
62 | #define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */ | |
63 | ||
64 | #define MAX_BAUD_RATE 921600 | |
65 | #define DEFAULT_BAUD_RATE 9600 | |
66 | ||
67 | #define QT2_WRITE_BUFFER_SIZE 512 /* size of write buffer */ | |
68 | #define QT2_WRITE_CONTROL_SIZE 5 /* control bytes used for a write */ | |
69 | ||
70 | /* Version Information */ | |
71 | #define DRIVER_VERSION "v0.1" | |
72 | #define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver" | |
73 | ||
74 | #define USB_VENDOR_ID_QUATECH 0x061d | |
75 | #define QUATECH_SSU2_100 0xC120 /* RS232 single port */ | |
76 | #define QUATECH_DSU2_100 0xC140 /* RS232 dual port */ | |
77 | #define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */ | |
78 | #define QUATECH_QSU2_100 0xC160 /* RS232 four port */ | |
79 | #define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */ | |
80 | #define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */ | |
81 | #define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */ | |
82 | ||
83 | struct qt2_device_detail { | |
84 | int product_id; | |
85 | int num_ports; | |
86 | }; | |
87 | ||
88 | #define QT_DETAILS(prod, ports) \ | |
89 | .product_id = (prod), \ | |
90 | .num_ports = (ports) | |
91 | ||
92 | static const struct qt2_device_detail qt2_device_details[] = { | |
93 | {QT_DETAILS(QUATECH_SSU2_100, 1)}, | |
94 | {QT_DETAILS(QUATECH_DSU2_400, 2)}, | |
95 | {QT_DETAILS(QUATECH_DSU2_100, 2)}, | |
96 | {QT_DETAILS(QUATECH_QSU2_400, 4)}, | |
97 | {QT_DETAILS(QUATECH_QSU2_100, 4)}, | |
98 | {QT_DETAILS(QUATECH_ESU2_400, 8)}, | |
99 | {QT_DETAILS(QUATECH_ESU2_100, 8)}, | |
100 | {QT_DETAILS(0, 0)} /* Terminating entry */ | |
101 | }; | |
102 | ||
103 | static const struct usb_device_id id_table[] = { | |
104 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)}, | |
105 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)}, | |
106 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)}, | |
107 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)}, | |
108 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)}, | |
109 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)}, | |
110 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)}, | |
111 | {} /* Terminating entry */ | |
112 | }; | |
113 | MODULE_DEVICE_TABLE(usb, id_table); | |
114 | ||
115 | struct qt2_serial_private { | |
116 | unsigned char current_port; /* current port for incoming data */ | |
117 | ||
118 | struct urb *read_urb; /* shared among all ports */ | |
119 | char read_buffer[512]; | |
120 | }; | |
121 | ||
122 | struct qt2_port_private { | |
123 | bool is_open; | |
124 | u8 device_port; | |
125 | ||
126 | spinlock_t urb_lock; | |
127 | bool urb_in_use; | |
128 | struct urb *write_urb; | |
129 | char write_buffer[QT2_WRITE_BUFFER_SIZE]; | |
130 | ||
131 | spinlock_t lock; | |
132 | u8 shadowLSR; | |
133 | u8 shadowMSR; | |
134 | ||
135 | wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ | |
136 | struct async_icount icount; | |
137 | ||
138 | struct usb_serial_port *port; | |
139 | }; | |
140 | ||
141 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch); | |
142 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch); | |
143 | static void qt2_write_bulk_callback(struct urb *urb); | |
144 | static void qt2_read_bulk_callback(struct urb *urb); | |
145 | ||
146 | static void qt2_release(struct usb_serial *serial) | |
147 | { | |
148 | int i; | |
149 | ||
150 | kfree(usb_get_serial_data(serial)); | |
151 | ||
152 | for (i = 0; i < serial->num_ports; i++) | |
153 | kfree(usb_get_serial_port_data(serial->port[i])); | |
154 | } | |
155 | ||
156 | static inline int calc_baud_divisor(int baudrate) | |
157 | { | |
158 | int divisor, rem; | |
159 | ||
160 | divisor = MAX_BAUD_RATE / baudrate; | |
161 | rem = MAX_BAUD_RATE % baudrate; | |
162 | /* Round to nearest divisor */ | |
163 | if (((rem * 2) >= baudrate) && (baudrate != 110)) | |
164 | divisor++; | |
165 | ||
166 | return divisor; | |
167 | } | |
168 | ||
169 | static inline int qt2_set_port_config(struct usb_device *dev, | |
170 | unsigned char port_number, | |
171 | u16 baudrate, u16 lcr) | |
172 | { | |
173 | int divisor = calc_baud_divisor(baudrate); | |
174 | u16 index = ((u16) (lcr << 8) | (u16) (port_number)); | |
175 | ||
176 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
177 | QT2_GET_SET_UART, 0x40, | |
178 | divisor, index, NULL, 0, QT2_USB_TIMEOUT); | |
179 | } | |
180 | ||
181 | static inline int qt2_control_msg(struct usb_device *dev, | |
182 | u8 request, u16 data, u16 index) | |
183 | { | |
184 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
185 | request, 0x40, data, index, | |
186 | NULL, 0, QT2_USB_TIMEOUT); | |
187 | } | |
188 | ||
189 | static inline int qt2_setdevice(struct usb_device *dev, u8 *data) | |
190 | { | |
191 | u16 x = ((u16) (data[1] << 8) | (u16) (data[0])); | |
192 | ||
193 | return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
194 | } | |
195 | ||
196 | ||
197 | static inline int qt2_getdevice(struct usb_device *dev, u8 *data) | |
198 | { | |
199 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
200 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
201 | data, 3, QT2_USB_TIMEOUT); | |
202 | } | |
203 | ||
204 | static inline int qt2_getregister(struct usb_device *dev, | |
205 | u8 uart, | |
206 | u8 reg, | |
207 | u8 *data) | |
208 | { | |
209 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
210 | QT_SET_GET_REGISTER, 0xc0, reg, | |
211 | uart, data, sizeof(*data), QT2_USB_TIMEOUT); | |
212 | ||
213 | } | |
214 | ||
215 | static inline int qt2_setregister(struct usb_device *dev, | |
216 | u8 uart, u8 reg, u16 data) | |
217 | { | |
218 | u16 value = (data << 8) | reg; | |
219 | ||
220 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
221 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
222 | NULL, 0, QT2_USB_TIMEOUT); | |
223 | } | |
224 | ||
225 | static inline int update_mctrl(struct qt2_port_private *port_priv, | |
226 | unsigned int set, unsigned int clear) | |
227 | { | |
228 | struct usb_serial_port *port = port_priv->port; | |
229 | struct usb_device *dev = port->serial->dev; | |
230 | unsigned urb_value; | |
231 | int status; | |
232 | ||
233 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
234 | dev_dbg(&port->dev, | |
235 | "update_mctrl - DTR|RTS not being set|cleared\n"); | |
236 | return 0; /* no change */ | |
237 | } | |
238 | ||
239 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
240 | urb_value = 0; | |
241 | if (set & TIOCM_DTR) | |
242 | urb_value |= UART_MCR_DTR; | |
243 | if (set & TIOCM_RTS) | |
244 | urb_value |= UART_MCR_RTS; | |
245 | ||
246 | status = qt2_setregister(dev, port_priv->device_port, UART_MCR, | |
247 | urb_value); | |
248 | if (status < 0) | |
249 | dev_err(&port->dev, | |
250 | "update_mctrl - Error from MODEM_CTRL urb: %i\n", | |
251 | status); | |
252 | return status; | |
253 | } | |
254 | ||
255 | static int qt2_calc_num_ports(struct usb_serial *serial) | |
256 | { | |
257 | struct qt2_device_detail d; | |
258 | int i; | |
259 | ||
260 | for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) { | |
261 | if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct)) | |
262 | return d.num_ports; | |
263 | } | |
264 | ||
265 | /* we didn't recognize the device */ | |
266 | dev_err(&serial->dev->dev, | |
267 | "don't know the number of ports, assuming 1\n"); | |
268 | ||
269 | return 1; | |
270 | } | |
271 | ||
272 | static void qt2_set_termios(struct tty_struct *tty, | |
273 | struct usb_serial_port *port, | |
274 | struct ktermios *old_termios) | |
275 | { | |
276 | struct usb_device *dev = port->serial->dev; | |
277 | struct qt2_port_private *port_priv; | |
adc8d746 | 278 | struct ktermios *termios = &tty->termios; |
f7a33e60 BP |
279 | u16 baud; |
280 | unsigned int cflag = termios->c_cflag; | |
281 | u16 new_lcr = 0; | |
282 | int status; | |
283 | ||
284 | port_priv = usb_get_serial_port_data(port); | |
285 | ||
286 | if (cflag & PARENB) { | |
287 | if (cflag & PARODD) | |
288 | new_lcr |= UART_LCR_PARITY; | |
289 | else | |
290 | new_lcr |= SERIAL_EVEN_PARITY; | |
291 | } | |
292 | ||
293 | switch (cflag & CSIZE) { | |
294 | case CS5: | |
295 | new_lcr |= UART_LCR_WLEN5; | |
296 | break; | |
297 | case CS6: | |
298 | new_lcr |= UART_LCR_WLEN6; | |
299 | break; | |
300 | case CS7: | |
301 | new_lcr |= UART_LCR_WLEN7; | |
302 | break; | |
303 | default: | |
304 | case CS8: | |
305 | new_lcr |= UART_LCR_WLEN8; | |
306 | break; | |
307 | } | |
308 | ||
309 | baud = tty_get_baud_rate(tty); | |
310 | if (!baud) | |
311 | baud = 9600; | |
312 | ||
313 | status = qt2_set_port_config(dev, port_priv->device_port, baud, | |
314 | new_lcr); | |
315 | if (status < 0) | |
316 | dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n", | |
317 | __func__, status); | |
318 | ||
319 | if (cflag & CRTSCTS) | |
320 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
321 | SERIAL_CRTSCTS, | |
322 | port_priv->device_port); | |
323 | else | |
324 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
325 | 0, port_priv->device_port); | |
326 | if (status < 0) | |
327 | dev_err(&port->dev, "%s - set HW flow control failed: %i\n", | |
328 | __func__, status); | |
329 | ||
330 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
331 | u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty))); | |
332 | ||
333 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
334 | x, port_priv->device_port); | |
335 | } else | |
336 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
337 | 0, port_priv->device_port); | |
338 | ||
339 | if (status < 0) | |
340 | dev_err(&port->dev, "%s - set SW flow control failed: %i\n", | |
341 | __func__, status); | |
342 | ||
343 | } | |
344 | ||
345 | static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) | |
346 | { | |
347 | struct usb_serial *serial; | |
f7a33e60 BP |
348 | struct qt2_port_private *port_priv; |
349 | u8 *data; | |
350 | u16 device_port; | |
351 | int status; | |
352 | unsigned long flags; | |
353 | ||
354 | device_port = (u16) (port->number - port->serial->minor); | |
355 | ||
356 | serial = port->serial; | |
357 | ||
358 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
359 | |
360 | /* set the port to RS232 mode */ | |
361 | status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR, | |
362 | QT2_QMCR_RS232, device_port); | |
363 | if (status < 0) { | |
364 | dev_err(&port->dev, | |
365 | "%s failed to set RS232 mode for port %i error %i\n", | |
366 | __func__, device_port, status); | |
367 | return status; | |
368 | } | |
369 | ||
370 | data = kzalloc(2, GFP_KERNEL); | |
371 | if (!data) | |
372 | return -ENOMEM; | |
373 | ||
374 | /* open the port */ | |
375 | status = usb_control_msg(serial->dev, | |
376 | usb_rcvctrlpipe(serial->dev, 0), | |
377 | QT_OPEN_CLOSE_CHANNEL, | |
378 | 0xc0, 0, | |
379 | device_port, data, 2, QT2_USB_TIMEOUT); | |
380 | ||
381 | if (status < 0) { | |
382 | dev_err(&port->dev, "%s - open port failed %i", __func__, | |
383 | status); | |
384 | kfree(data); | |
385 | return status; | |
386 | } | |
387 | ||
388 | spin_lock_irqsave(&port_priv->lock, flags); | |
389 | port_priv->shadowLSR = data[0]; | |
390 | port_priv->shadowMSR = data[1]; | |
391 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
392 | ||
393 | kfree(data); | |
394 | ||
395 | /* set to default speed and 8bit word size */ | |
396 | status = qt2_set_port_config(serial->dev, device_port, | |
397 | DEFAULT_BAUD_RATE, UART_LCR_WLEN8); | |
398 | if (status < 0) { | |
399 | dev_err(&port->dev, | |
400 | "%s - initial setup failed for port %i (%i)\n", | |
401 | __func__, port->number, device_port); | |
402 | return status; | |
403 | } | |
404 | ||
405 | port_priv->is_open = true; | |
406 | port_priv->device_port = (u8) device_port; | |
407 | ||
408 | if (tty) | |
adc8d746 | 409 | qt2_set_termios(tty, port, &tty->termios); |
f7a33e60 BP |
410 | |
411 | return 0; | |
412 | ||
413 | } | |
414 | ||
415 | static void qt2_close(struct usb_serial_port *port) | |
416 | { | |
417 | struct usb_serial *serial; | |
f7a33e60 BP |
418 | struct qt2_port_private *port_priv; |
419 | unsigned long flags; | |
420 | int i; | |
421 | ||
422 | serial = port->serial; | |
f7a33e60 BP |
423 | port_priv = usb_get_serial_port_data(port); |
424 | ||
425 | port_priv->is_open = false; | |
426 | ||
427 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
428 | if (port_priv->write_urb->status == -EINPROGRESS) | |
429 | usb_kill_urb(port_priv->write_urb); | |
430 | port_priv->urb_in_use = false; | |
431 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
432 | ||
433 | /* flush the port transmit buffer */ | |
434 | i = usb_control_msg(serial->dev, | |
435 | usb_rcvctrlpipe(serial->dev, 0), | |
436 | QT2_FLUSH_DEVICE, 0x40, 1, | |
437 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
438 | ||
439 | if (i < 0) | |
440 | dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n", | |
441 | __func__, i); | |
442 | ||
443 | /* flush the port receive buffer */ | |
444 | i = usb_control_msg(serial->dev, | |
445 | usb_rcvctrlpipe(serial->dev, 0), | |
446 | QT2_FLUSH_DEVICE, 0x40, 0, | |
447 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
448 | ||
449 | if (i < 0) | |
450 | dev_err(&port->dev, "%s - receive buffer flush failed: %i\n", | |
451 | __func__, i); | |
452 | ||
453 | /* close the port */ | |
454 | i = usb_control_msg(serial->dev, | |
455 | usb_sndctrlpipe(serial->dev, 0), | |
456 | QT_OPEN_CLOSE_CHANNEL, | |
457 | 0x40, 0, | |
458 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
459 | ||
460 | if (i < 0) | |
461 | dev_err(&port->dev, "%s - close port failed %i\n", | |
462 | __func__, i); | |
463 | ||
464 | } | |
465 | ||
466 | static void qt2_disconnect(struct usb_serial *serial) | |
467 | { | |
468 | struct qt2_serial_private *serial_priv = usb_get_serial_data(serial); | |
469 | struct qt2_port_private *port_priv; | |
470 | int i; | |
471 | ||
472 | if (serial_priv->read_urb->status == -EINPROGRESS) | |
473 | usb_kill_urb(serial_priv->read_urb); | |
474 | ||
475 | usb_free_urb(serial_priv->read_urb); | |
476 | ||
477 | for (i = 0; i < serial->num_ports; i++) { | |
478 | port_priv = usb_get_serial_port_data(serial->port[i]); | |
479 | ||
480 | if (port_priv->write_urb->status == -EINPROGRESS) | |
481 | usb_kill_urb(port_priv->write_urb); | |
482 | usb_free_urb(port_priv->write_urb); | |
483 | } | |
484 | } | |
485 | ||
486 | static int get_serial_info(struct usb_serial_port *port, | |
487 | struct serial_struct __user *retinfo) | |
488 | { | |
489 | struct serial_struct tmp; | |
490 | ||
491 | if (!retinfo) | |
492 | return -EFAULT; | |
493 | ||
494 | memset(&tmp, 0, sizeof(tmp)); | |
495 | tmp.line = port->serial->minor; | |
496 | tmp.port = 0; | |
497 | tmp.irq = 0; | |
498 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
499 | tmp.xmit_fifo_size = port->bulk_out_size; | |
500 | tmp.baud_base = 9600; | |
501 | tmp.close_delay = 5*HZ; | |
502 | tmp.closing_wait = 30*HZ; | |
503 | ||
504 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
505 | return -EFAULT; | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) | |
510 | { | |
511 | struct qt2_port_private *priv = usb_get_serial_port_data(port); | |
512 | struct async_icount prev, cur; | |
513 | unsigned long flags; | |
514 | ||
515 | spin_lock_irqsave(&priv->lock, flags); | |
516 | prev = priv->icount; | |
517 | spin_unlock_irqrestore(&priv->lock, flags); | |
518 | ||
519 | while (1) { | |
520 | wait_event_interruptible(priv->delta_msr_wait, | |
521 | ((priv->icount.rng != prev.rng) || | |
522 | (priv->icount.dsr != prev.dsr) || | |
523 | (priv->icount.dcd != prev.dcd) || | |
524 | (priv->icount.cts != prev.cts))); | |
525 | ||
526 | if (signal_pending(current)) | |
527 | return -ERESTARTSYS; | |
528 | ||
529 | spin_lock_irqsave(&priv->lock, flags); | |
530 | cur = priv->icount; | |
531 | spin_unlock_irqrestore(&priv->lock, flags); | |
532 | ||
533 | if ((prev.rng == cur.rng) && | |
534 | (prev.dsr == cur.dsr) && | |
535 | (prev.dcd == cur.dcd) && | |
536 | (prev.cts == cur.cts)) | |
537 | return -EIO; | |
538 | ||
539 | if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) || | |
540 | (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) || | |
541 | (arg & TIOCM_CD && (prev.dcd != cur.dcd)) || | |
542 | (arg & TIOCM_CTS && (prev.cts != cur.cts))) | |
543 | return 0; | |
544 | } | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static int qt2_get_icount(struct tty_struct *tty, | |
549 | struct serial_icounter_struct *icount) | |
550 | { | |
551 | struct usb_serial_port *port = tty->driver_data; | |
552 | struct qt2_port_private *priv = usb_get_serial_port_data(port); | |
553 | struct async_icount cnow = priv->icount; | |
554 | ||
555 | icount->cts = cnow.cts; | |
556 | icount->dsr = cnow.dsr; | |
557 | icount->rng = cnow.rng; | |
558 | icount->dcd = cnow.dcd; | |
559 | icount->rx = cnow.rx; | |
560 | icount->tx = cnow.tx; | |
561 | icount->frame = cnow.frame; | |
562 | icount->overrun = cnow.overrun; | |
563 | icount->parity = cnow.parity; | |
564 | icount->brk = cnow.brk; | |
565 | icount->buf_overrun = cnow.buf_overrun; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | static int qt2_ioctl(struct tty_struct *tty, | |
571 | unsigned int cmd, unsigned long arg) | |
572 | { | |
573 | struct usb_serial_port *port = tty->driver_data; | |
574 | ||
575 | switch (cmd) { | |
576 | case TIOCGSERIAL: | |
577 | return get_serial_info(port, | |
578 | (struct serial_struct __user *)arg); | |
579 | ||
580 | case TIOCMIWAIT: | |
581 | return wait_modem_info(port, arg); | |
582 | ||
583 | default: | |
584 | break; | |
585 | } | |
586 | ||
587 | return -ENOIOCTLCMD; | |
588 | } | |
589 | ||
590 | static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) | |
591 | { | |
592 | switch (*ch) { | |
593 | case QT2_LINE_STATUS: | |
594 | qt2_update_lsr(port, ch + 1); | |
595 | break; | |
596 | case QT2_MODEM_STATUS: | |
597 | qt2_update_msr(port, ch + 1); | |
598 | break; | |
599 | } | |
600 | } | |
601 | ||
602 | /* not needed, kept to document functionality */ | |
603 | static void qt2_process_xmit_empty(struct usb_serial_port *port, | |
604 | unsigned char *ch) | |
605 | { | |
606 | int bytes_written; | |
607 | ||
608 | bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4); | |
609 | } | |
610 | ||
611 | /* not needed, kept to document functionality */ | |
612 | static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch) | |
613 | { | |
614 | return; | |
615 | } | |
616 | ||
617 | void qt2_process_read_urb(struct urb *urb) | |
618 | { | |
619 | struct usb_serial *serial; | |
620 | struct qt2_serial_private *serial_priv; | |
621 | struct usb_serial_port *port; | |
622 | struct qt2_port_private *port_priv; | |
623 | struct tty_struct *tty; | |
624 | bool escapeflag; | |
625 | unsigned char *ch; | |
626 | int i; | |
627 | unsigned char newport; | |
628 | int len = urb->actual_length; | |
629 | ||
630 | if (!len) | |
631 | return; | |
632 | ||
633 | ch = urb->transfer_buffer; | |
634 | tty = NULL; | |
635 | serial = urb->context; | |
636 | serial_priv = usb_get_serial_data(serial); | |
637 | port = serial->port[serial_priv->current_port]; | |
638 | port_priv = usb_get_serial_port_data(port); | |
639 | ||
640 | if (port_priv->is_open) | |
641 | tty = tty_port_tty_get(&port->port); | |
642 | ||
643 | for (i = 0; i < urb->actual_length; i++) { | |
644 | ch = (unsigned char *)urb->transfer_buffer + i; | |
645 | if ((i <= (len - 3)) && | |
646 | (*ch == QT2_CONTROL_BYTE) && | |
647 | (*(ch + 1) == QT2_CONTROL_BYTE)) { | |
648 | escapeflag = false; | |
649 | switch (*(ch + 2)) { | |
650 | case QT2_LINE_STATUS: | |
651 | case QT2_MODEM_STATUS: | |
652 | if (i > (len - 4)) { | |
653 | dev_warn(&port->dev, | |
654 | "%s - status message too short\n", | |
655 | __func__); | |
656 | break; | |
657 | } | |
658 | qt2_process_status(port, ch + 2); | |
659 | i += 3; | |
660 | escapeflag = true; | |
661 | break; | |
662 | case QT2_XMIT_HOLD: | |
663 | if (i > (len - 5)) { | |
664 | dev_warn(&port->dev, | |
665 | "%s - xmit_empty message too short\n", | |
666 | __func__); | |
667 | break; | |
668 | } | |
669 | qt2_process_xmit_empty(port, ch + 3); | |
670 | i += 4; | |
671 | escapeflag = true; | |
672 | break; | |
673 | case QT2_CHANGE_PORT: | |
674 | if (i > (len - 4)) { | |
675 | dev_warn(&port->dev, | |
676 | "%s - change_port message too short\n", | |
677 | __func__); | |
678 | break; | |
679 | } | |
680 | if (tty) { | |
681 | tty_flip_buffer_push(tty); | |
682 | tty_kref_put(tty); | |
683 | } | |
684 | ||
685 | newport = *(ch + 3); | |
686 | ||
687 | if (newport > serial->num_ports) { | |
688 | dev_err(&port->dev, | |
689 | "%s - port change to invalid port: %i\n", | |
690 | __func__, newport); | |
691 | break; | |
692 | } | |
693 | ||
694 | serial_priv->current_port = newport; | |
695 | port = serial->port[serial_priv->current_port]; | |
696 | port_priv = usb_get_serial_port_data(port); | |
697 | if (port_priv->is_open) | |
698 | tty = tty_port_tty_get(&port->port); | |
699 | else | |
700 | tty = NULL; | |
701 | i += 3; | |
702 | escapeflag = true; | |
703 | break; | |
704 | case QT2_REC_FLUSH: | |
705 | case QT2_XMIT_FLUSH: | |
706 | qt2_process_flush(port, ch + 2); | |
707 | i += 2; | |
708 | escapeflag = true; | |
709 | break; | |
710 | case QT2_CONTROL_ESCAPE: | |
711 | tty_buffer_request_room(tty, 2); | |
712 | tty_insert_flip_string(tty, ch, 2); | |
713 | i += 2; | |
714 | escapeflag = true; | |
715 | break; | |
716 | default: | |
717 | dev_warn(&port->dev, | |
718 | "%s - unsupported command %i\n", | |
719 | __func__, *(ch + 2)); | |
720 | break; | |
721 | } | |
722 | if (escapeflag) | |
723 | continue; | |
724 | } | |
725 | ||
726 | if (tty) { | |
727 | tty_buffer_request_room(tty, 1); | |
728 | tty_insert_flip_string(tty, ch, 1); | |
729 | } | |
730 | } | |
731 | ||
732 | if (tty) { | |
733 | tty_flip_buffer_push(tty); | |
734 | tty_kref_put(tty); | |
735 | } | |
736 | } | |
737 | ||
738 | static void qt2_write_bulk_callback(struct urb *urb) | |
739 | { | |
740 | struct usb_serial_port *port; | |
741 | struct qt2_port_private *port_priv; | |
742 | ||
743 | port = urb->context; | |
744 | port_priv = usb_get_serial_port_data(port); | |
745 | ||
746 | spin_lock(&port_priv->urb_lock); | |
747 | ||
748 | port_priv->urb_in_use = false; | |
749 | usb_serial_port_softint(port); | |
750 | ||
751 | spin_unlock(&port_priv->urb_lock); | |
752 | ||
753 | } | |
754 | ||
755 | static void qt2_read_bulk_callback(struct urb *urb) | |
756 | { | |
757 | struct usb_serial *serial = urb->context; | |
758 | int status; | |
759 | ||
760 | if (urb->status) { | |
761 | dev_warn(&serial->dev->dev, | |
762 | "%s - non-zero urb status: %i\n", __func__, | |
763 | urb->status); | |
764 | return; | |
765 | } | |
766 | ||
767 | qt2_process_read_urb(urb); | |
768 | ||
769 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
770 | if (status != 0) | |
771 | dev_err(&serial->dev->dev, | |
772 | "%s - resubmit read urb failed: %i\n", | |
773 | __func__, status); | |
774 | } | |
775 | ||
776 | static int qt2_setup_urbs(struct usb_serial *serial) | |
777 | { | |
778 | struct usb_serial_port *port; | |
779 | struct usb_serial_port *port0; | |
780 | struct qt2_serial_private *serial_priv; | |
781 | struct qt2_port_private *port_priv; | |
782 | int pcount, status; | |
783 | ||
784 | port0 = serial->port[0]; | |
785 | ||
786 | serial_priv = usb_get_serial_data(serial); | |
787 | serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
788 | if (!serial_priv->read_urb) { | |
789 | dev_err(&serial->dev->dev, "No free urbs available\n"); | |
790 | return -ENOMEM; | |
791 | } | |
792 | ||
793 | usb_fill_bulk_urb(serial_priv->read_urb, serial->dev, | |
794 | usb_rcvbulkpipe(serial->dev, | |
795 | port0->bulk_in_endpointAddress), | |
796 | serial_priv->read_buffer, | |
797 | sizeof(serial_priv->read_buffer), | |
798 | qt2_read_bulk_callback, serial); | |
799 | ||
800 | /* setup write_urb for each port */ | |
801 | for (pcount = 0; pcount < serial->num_ports; pcount++) { | |
802 | ||
803 | port = serial->port[pcount]; | |
804 | port_priv = usb_get_serial_port_data(port); | |
805 | ||
806 | port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
807 | if (!port_priv->write_urb) { | |
808 | dev_err(&serial->dev->dev, | |
809 | "failed to alloc write_urb for port %i\n", | |
810 | pcount); | |
811 | return -ENOMEM; | |
812 | } | |
813 | ||
814 | usb_fill_bulk_urb(port_priv->write_urb, | |
815 | serial->dev, | |
816 | usb_sndbulkpipe(serial->dev, | |
817 | port0-> | |
818 | bulk_out_endpointAddress), | |
819 | port_priv->write_buffer, | |
820 | sizeof(port_priv->write_buffer), | |
821 | qt2_write_bulk_callback, port); | |
822 | } | |
823 | ||
824 | status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL); | |
825 | if (status != 0) { | |
826 | dev_err(&serial->dev->dev, | |
827 | "%s - submit read urb failed %i\n", __func__, status); | |
828 | return status; | |
829 | } | |
830 | ||
831 | return 0; | |
832 | ||
833 | } | |
834 | ||
835 | static int qt2_attach(struct usb_serial *serial) | |
836 | { | |
837 | struct qt2_serial_private *serial_priv; | |
838 | struct qt2_port_private *port_priv; | |
839 | int status, pcount; | |
840 | ||
841 | /* power on unit */ | |
842 | status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
843 | 0xc2, 0x40, 0x8000, 0, NULL, 0, | |
844 | QT2_USB_TIMEOUT); | |
845 | if (status < 0) { | |
846 | dev_err(&serial->dev->dev, | |
847 | "%s - failed to power on unit: %i\n", __func__, status); | |
848 | return status; | |
849 | } | |
850 | ||
851 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
852 | if (!serial_priv) { | |
853 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
854 | return -ENOMEM; | |
855 | } | |
856 | ||
857 | usb_set_serial_data(serial, serial_priv); | |
858 | ||
859 | for (pcount = 0; pcount < serial->num_ports; pcount++) { | |
860 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); | |
861 | if (!port_priv) { | |
862 | dev_err(&serial->dev->dev, | |
863 | "%s- kmalloc(%Zd) failed.\n", __func__, | |
864 | sizeof(*port_priv)); | |
865 | pcount--; | |
866 | status = -ENOMEM; | |
867 | goto attach_failed; | |
868 | } | |
869 | ||
870 | spin_lock_init(&port_priv->lock); | |
871 | spin_lock_init(&port_priv->urb_lock); | |
872 | init_waitqueue_head(&port_priv->delta_msr_wait); | |
873 | ||
874 | port_priv->port = serial->port[pcount]; | |
875 | ||
876 | usb_set_serial_port_data(serial->port[pcount], port_priv); | |
877 | } | |
878 | ||
879 | status = qt2_setup_urbs(serial); | |
880 | if (status != 0) | |
881 | goto attach_failed; | |
882 | ||
883 | return 0; | |
884 | ||
885 | attach_failed: | |
886 | for (/* empty */; pcount >= 0; pcount--) { | |
887 | port_priv = usb_get_serial_port_data(serial->port[pcount]); | |
888 | kfree(port_priv); | |
889 | } | |
890 | kfree(serial_priv); | |
891 | return status; | |
892 | } | |
893 | ||
894 | static int qt2_tiocmget(struct tty_struct *tty) | |
895 | { | |
896 | struct usb_serial_port *port = tty->driver_data; | |
897 | struct usb_device *dev = port->serial->dev; | |
898 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
899 | u8 *d; | |
900 | int r; | |
901 | ||
902 | d = kzalloc(2, GFP_KERNEL); | |
903 | if (!d) | |
904 | return -ENOMEM; | |
905 | ||
906 | r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d); | |
907 | if (r < 0) | |
908 | goto mget_out; | |
909 | ||
910 | r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1); | |
911 | if (r < 0) | |
912 | goto mget_out; | |
913 | ||
914 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | | |
915 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
916 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
917 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
918 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
919 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
920 | ||
921 | mget_out: | |
922 | kfree(d); | |
923 | return r; | |
924 | } | |
925 | ||
926 | static int qt2_tiocmset(struct tty_struct *tty, | |
927 | unsigned int set, unsigned int clear) | |
928 | { | |
929 | struct qt2_port_private *port_priv; | |
930 | ||
931 | port_priv = usb_get_serial_port_data(tty->driver_data); | |
932 | return update_mctrl(port_priv, set, clear); | |
933 | } | |
934 | ||
935 | static void qt2_break_ctl(struct tty_struct *tty, int break_state) | |
936 | { | |
937 | struct usb_serial_port *port = tty->driver_data; | |
938 | struct qt2_port_private *port_priv; | |
939 | int status; | |
940 | u16 val; | |
941 | ||
942 | port_priv = usb_get_serial_port_data(port); | |
943 | ||
944 | if (!port_priv->is_open) { | |
945 | dev_err(&port->dev, | |
946 | "%s - port is not open\n", __func__); | |
947 | return; | |
948 | } | |
949 | ||
950 | val = (break_state == -1) ? 1 : 0; | |
951 | ||
952 | status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL, | |
953 | val, port_priv->device_port); | |
954 | if (status < 0) | |
955 | dev_warn(&port->dev, | |
956 | "%s - failed to send control message: %i\n", __func__, | |
957 | status); | |
958 | } | |
959 | ||
960 | ||
961 | ||
962 | static void qt2_dtr_rts(struct usb_serial_port *port, int on) | |
963 | { | |
964 | struct usb_device *dev = port->serial->dev; | |
965 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
966 | ||
967 | mutex_lock(&port->serial->disc_mutex); | |
968 | if (!port->serial->disconnected) { | |
969 | /* Disable flow control */ | |
970 | if (!on && qt2_setregister(dev, port_priv->device_port, | |
971 | UART_MCR, 0) < 0) | |
972 | dev_warn(&port->dev, "error from flowcontrol urb\n"); | |
973 | /* drop RTS and DTR */ | |
974 | if (on) | |
975 | update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0); | |
976 | else | |
977 | update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS); | |
978 | } | |
979 | mutex_unlock(&port->serial->disc_mutex); | |
980 | } | |
981 | ||
982 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch) | |
983 | { | |
984 | struct qt2_port_private *port_priv; | |
985 | u8 newMSR = (u8) *ch; | |
986 | unsigned long flags; | |
987 | ||
988 | port_priv = usb_get_serial_port_data(port); | |
989 | ||
990 | spin_lock_irqsave(&port_priv->lock, flags); | |
991 | port_priv->shadowMSR = newMSR; | |
992 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
993 | ||
994 | if (newMSR & UART_MSR_ANY_DELTA) { | |
995 | /* update input line counters */ | |
996 | if (newMSR & UART_MSR_DCTS) | |
997 | port_priv->icount.cts++; | |
998 | ||
999 | if (newMSR & UART_MSR_DDSR) | |
1000 | port_priv->icount.dsr++; | |
1001 | ||
1002 | if (newMSR & UART_MSR_DDCD) | |
1003 | port_priv->icount.dcd++; | |
1004 | ||
1005 | if (newMSR & UART_MSR_TERI) | |
1006 | port_priv->icount.rng++; | |
1007 | ||
1008 | wake_up_interruptible(&port_priv->delta_msr_wait); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch) | |
1013 | { | |
1014 | struct qt2_port_private *port_priv; | |
1015 | struct async_icount *icount; | |
1016 | unsigned long flags; | |
1017 | u8 newLSR = (u8) *ch; | |
1018 | ||
1019 | port_priv = usb_get_serial_port_data(port); | |
1020 | ||
1021 | if (newLSR & UART_LSR_BI) | |
1022 | newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI); | |
1023 | ||
1024 | spin_lock_irqsave(&port_priv->lock, flags); | |
1025 | port_priv->shadowLSR = newLSR; | |
1026 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
1027 | ||
1028 | icount = &port_priv->icount; | |
1029 | ||
1030 | if (newLSR & UART_LSR_BRK_ERROR_BITS) { | |
1031 | ||
1032 | if (newLSR & UART_LSR_BI) | |
1033 | icount->brk++; | |
1034 | ||
1035 | if (newLSR & UART_LSR_OE) | |
1036 | icount->overrun++; | |
1037 | ||
1038 | if (newLSR & UART_LSR_PE) | |
1039 | icount->parity++; | |
1040 | ||
1041 | if (newLSR & UART_LSR_FE) | |
1042 | icount->frame++; | |
1043 | } | |
1044 | ||
1045 | } | |
1046 | ||
1047 | static int qt2_write_room(struct tty_struct *tty) | |
1048 | { | |
1049 | struct usb_serial_port *port = tty->driver_data; | |
1050 | struct qt2_port_private *port_priv; | |
1051 | unsigned long flags = 0; | |
1052 | int r; | |
1053 | ||
1054 | port_priv = usb_get_serial_port_data(port); | |
1055 | ||
1056 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
1057 | ||
1058 | if (port_priv->urb_in_use) | |
1059 | r = 0; | |
1060 | else | |
1061 | r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE; | |
1062 | ||
1063 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
1064 | ||
1065 | return r; | |
1066 | } | |
1067 | ||
1068 | static int qt2_write(struct tty_struct *tty, | |
1069 | struct usb_serial_port *port, | |
1070 | const unsigned char *buf, int count) | |
1071 | { | |
1072 | struct qt2_port_private *port_priv; | |
1073 | struct urb *write_urb; | |
1074 | unsigned char *data; | |
1075 | unsigned long flags; | |
1076 | int status; | |
1077 | int bytes_out = 0; | |
1078 | ||
1079 | port_priv = usb_get_serial_port_data(port); | |
1080 | ||
1081 | if (port_priv->write_urb == NULL) { | |
1082 | dev_err(&port->dev, "%s - no output urb\n", __func__); | |
1083 | return 0; | |
1084 | } | |
1085 | write_urb = port_priv->write_urb; | |
1086 | ||
1087 | count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE); | |
1088 | ||
1089 | data = write_urb->transfer_buffer; | |
1090 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
1091 | if (port_priv->urb_in_use == true) { | |
1092 | printk(KERN_INFO "qt2_write - urb is in use\n"); | |
1093 | goto write_out; | |
1094 | } | |
1095 | ||
1096 | *data++ = QT2_CONTROL_BYTE; | |
1097 | *data++ = QT2_CONTROL_BYTE; | |
1098 | *data++ = port_priv->device_port; | |
1099 | put_unaligned_le16(count, data); | |
1100 | data += 2; | |
1101 | memcpy(data, buf, count); | |
1102 | ||
1103 | write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE; | |
1104 | ||
1105 | status = usb_submit_urb(write_urb, GFP_ATOMIC); | |
1106 | if (status == 0) { | |
1107 | port_priv->urb_in_use = true; | |
1108 | bytes_out += count; | |
1109 | } | |
1110 | ||
1111 | write_out: | |
1112 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
1113 | return bytes_out; | |
1114 | } | |
1115 | ||
1116 | ||
1117 | static struct usb_serial_driver qt2_device = { | |
1118 | .driver = { | |
1119 | .owner = THIS_MODULE, | |
1120 | .name = "quatech-serial", | |
1121 | }, | |
1122 | .description = DRIVER_DESC, | |
1123 | .id_table = id_table, | |
1124 | .open = qt2_open, | |
1125 | .close = qt2_close, | |
1126 | .write = qt2_write, | |
1127 | .write_room = qt2_write_room, | |
1128 | .calc_num_ports = qt2_calc_num_ports, | |
1129 | .attach = qt2_attach, | |
1130 | .release = qt2_release, | |
1131 | .disconnect = qt2_disconnect, | |
1132 | .dtr_rts = qt2_dtr_rts, | |
1133 | .break_ctl = qt2_break_ctl, | |
1134 | .tiocmget = qt2_tiocmget, | |
1135 | .tiocmset = qt2_tiocmset, | |
1136 | .get_icount = qt2_get_icount, | |
1137 | .ioctl = qt2_ioctl, | |
1138 | .set_termios = qt2_set_termios, | |
1139 | }; | |
1140 | ||
1141 | static struct usb_serial_driver *const serial_drivers[] = { | |
1142 | &qt2_device, NULL | |
1143 | }; | |
1144 | ||
1145 | module_usb_serial_driver(serial_drivers, id_table); | |
1146 | ||
1147 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1148 | MODULE_LICENSE("GPL"); | |
1149 | ||
1150 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1151 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |