]>
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 | ||
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 | ||
f7a33e60 BP |
68 | #define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver" |
69 | ||
70 | #define USB_VENDOR_ID_QUATECH 0x061d | |
71 | #define QUATECH_SSU2_100 0xC120 /* RS232 single port */ | |
72 | #define QUATECH_DSU2_100 0xC140 /* RS232 dual port */ | |
73 | #define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */ | |
74 | #define QUATECH_QSU2_100 0xC160 /* RS232 four port */ | |
75 | #define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */ | |
76 | #define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */ | |
77 | #define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */ | |
78 | ||
79 | struct qt2_device_detail { | |
80 | int product_id; | |
81 | int num_ports; | |
82 | }; | |
83 | ||
84 | #define QT_DETAILS(prod, ports) \ | |
85 | .product_id = (prod), \ | |
86 | .num_ports = (ports) | |
87 | ||
88 | static const struct qt2_device_detail qt2_device_details[] = { | |
89 | {QT_DETAILS(QUATECH_SSU2_100, 1)}, | |
90 | {QT_DETAILS(QUATECH_DSU2_400, 2)}, | |
91 | {QT_DETAILS(QUATECH_DSU2_100, 2)}, | |
92 | {QT_DETAILS(QUATECH_QSU2_400, 4)}, | |
93 | {QT_DETAILS(QUATECH_QSU2_100, 4)}, | |
94 | {QT_DETAILS(QUATECH_ESU2_400, 8)}, | |
95 | {QT_DETAILS(QUATECH_ESU2_100, 8)}, | |
96 | {QT_DETAILS(0, 0)} /* Terminating entry */ | |
97 | }; | |
98 | ||
99 | static const struct usb_device_id id_table[] = { | |
100 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)}, | |
101 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)}, | |
102 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)}, | |
103 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)}, | |
104 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)}, | |
105 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)}, | |
106 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)}, | |
107 | {} /* Terminating entry */ | |
108 | }; | |
109 | MODULE_DEVICE_TABLE(usb, id_table); | |
110 | ||
111 | struct qt2_serial_private { | |
112 | unsigned char current_port; /* current port for incoming data */ | |
113 | ||
114 | struct urb *read_urb; /* shared among all ports */ | |
115 | char read_buffer[512]; | |
116 | }; | |
117 | ||
118 | struct qt2_port_private { | |
f7a33e60 BP |
119 | u8 device_port; |
120 | ||
121 | spinlock_t urb_lock; | |
122 | bool urb_in_use; | |
123 | struct urb *write_urb; | |
124 | char write_buffer[QT2_WRITE_BUFFER_SIZE]; | |
125 | ||
126 | spinlock_t lock; | |
127 | u8 shadowLSR; | |
128 | u8 shadowMSR; | |
129 | ||
f7a33e60 BP |
130 | struct usb_serial_port *port; |
131 | }; | |
132 | ||
133 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch); | |
134 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch); | |
135 | static void qt2_write_bulk_callback(struct urb *urb); | |
136 | static void qt2_read_bulk_callback(struct urb *urb); | |
137 | ||
138 | static void qt2_release(struct usb_serial *serial) | |
139 | { | |
40d04738 | 140 | struct qt2_serial_private *serial_priv; |
f7a33e60 | 141 | |
40d04738 | 142 | serial_priv = usb_get_serial_data(serial); |
f7a33e60 | 143 | |
40d04738 JH |
144 | usb_free_urb(serial_priv->read_urb); |
145 | kfree(serial_priv); | |
f7a33e60 BP |
146 | } |
147 | ||
148 | static inline int calc_baud_divisor(int baudrate) | |
149 | { | |
150 | int divisor, rem; | |
151 | ||
152 | divisor = MAX_BAUD_RATE / baudrate; | |
153 | rem = MAX_BAUD_RATE % baudrate; | |
154 | /* Round to nearest divisor */ | |
155 | if (((rem * 2) >= baudrate) && (baudrate != 110)) | |
156 | divisor++; | |
157 | ||
158 | return divisor; | |
159 | } | |
160 | ||
161 | static inline int qt2_set_port_config(struct usb_device *dev, | |
162 | unsigned char port_number, | |
163 | u16 baudrate, u16 lcr) | |
164 | { | |
165 | int divisor = calc_baud_divisor(baudrate); | |
166 | u16 index = ((u16) (lcr << 8) | (u16) (port_number)); | |
167 | ||
168 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
169 | QT2_GET_SET_UART, 0x40, | |
170 | divisor, index, NULL, 0, QT2_USB_TIMEOUT); | |
171 | } | |
172 | ||
173 | static inline int qt2_control_msg(struct usb_device *dev, | |
174 | u8 request, u16 data, u16 index) | |
175 | { | |
176 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
177 | request, 0x40, data, index, | |
178 | NULL, 0, QT2_USB_TIMEOUT); | |
179 | } | |
180 | ||
181 | static inline int qt2_setdevice(struct usb_device *dev, u8 *data) | |
182 | { | |
183 | u16 x = ((u16) (data[1] << 8) | (u16) (data[0])); | |
184 | ||
185 | return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
186 | } | |
187 | ||
188 | ||
189 | static inline int qt2_getdevice(struct usb_device *dev, u8 *data) | |
190 | { | |
191 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
192 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
193 | data, 3, QT2_USB_TIMEOUT); | |
194 | } | |
195 | ||
196 | static inline int qt2_getregister(struct usb_device *dev, | |
197 | u8 uart, | |
198 | u8 reg, | |
199 | u8 *data) | |
200 | { | |
201 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
202 | QT_SET_GET_REGISTER, 0xc0, reg, | |
203 | uart, data, sizeof(*data), QT2_USB_TIMEOUT); | |
204 | ||
205 | } | |
206 | ||
207 | static inline int qt2_setregister(struct usb_device *dev, | |
208 | u8 uart, u8 reg, u16 data) | |
209 | { | |
210 | u16 value = (data << 8) | reg; | |
211 | ||
212 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
213 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
214 | NULL, 0, QT2_USB_TIMEOUT); | |
215 | } | |
216 | ||
217 | static inline int update_mctrl(struct qt2_port_private *port_priv, | |
218 | unsigned int set, unsigned int clear) | |
219 | { | |
220 | struct usb_serial_port *port = port_priv->port; | |
221 | struct usb_device *dev = port->serial->dev; | |
222 | unsigned urb_value; | |
223 | int status; | |
224 | ||
225 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
226 | dev_dbg(&port->dev, | |
227 | "update_mctrl - DTR|RTS not being set|cleared\n"); | |
228 | return 0; /* no change */ | |
229 | } | |
230 | ||
231 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
232 | urb_value = 0; | |
233 | if (set & TIOCM_DTR) | |
234 | urb_value |= UART_MCR_DTR; | |
235 | if (set & TIOCM_RTS) | |
236 | urb_value |= UART_MCR_RTS; | |
237 | ||
238 | status = qt2_setregister(dev, port_priv->device_port, UART_MCR, | |
239 | urb_value); | |
240 | if (status < 0) | |
241 | dev_err(&port->dev, | |
242 | "update_mctrl - Error from MODEM_CTRL urb: %i\n", | |
243 | status); | |
244 | return status; | |
245 | } | |
246 | ||
247 | static int qt2_calc_num_ports(struct usb_serial *serial) | |
248 | { | |
249 | struct qt2_device_detail d; | |
250 | int i; | |
251 | ||
252 | for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) { | |
253 | if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct)) | |
254 | return d.num_ports; | |
255 | } | |
256 | ||
257 | /* we didn't recognize the device */ | |
258 | dev_err(&serial->dev->dev, | |
259 | "don't know the number of ports, assuming 1\n"); | |
260 | ||
261 | return 1; | |
262 | } | |
263 | ||
264 | static void qt2_set_termios(struct tty_struct *tty, | |
265 | struct usb_serial_port *port, | |
266 | struct ktermios *old_termios) | |
267 | { | |
268 | struct usb_device *dev = port->serial->dev; | |
269 | struct qt2_port_private *port_priv; | |
adc8d746 | 270 | struct ktermios *termios = &tty->termios; |
f7a33e60 BP |
271 | u16 baud; |
272 | unsigned int cflag = termios->c_cflag; | |
273 | u16 new_lcr = 0; | |
274 | int status; | |
275 | ||
276 | port_priv = usb_get_serial_port_data(port); | |
277 | ||
278 | if (cflag & PARENB) { | |
279 | if (cflag & PARODD) | |
280 | new_lcr |= UART_LCR_PARITY; | |
281 | else | |
282 | new_lcr |= SERIAL_EVEN_PARITY; | |
283 | } | |
284 | ||
285 | switch (cflag & CSIZE) { | |
286 | case CS5: | |
287 | new_lcr |= UART_LCR_WLEN5; | |
288 | break; | |
289 | case CS6: | |
290 | new_lcr |= UART_LCR_WLEN6; | |
291 | break; | |
292 | case CS7: | |
293 | new_lcr |= UART_LCR_WLEN7; | |
294 | break; | |
295 | default: | |
296 | case CS8: | |
297 | new_lcr |= UART_LCR_WLEN8; | |
298 | break; | |
299 | } | |
300 | ||
301 | baud = tty_get_baud_rate(tty); | |
302 | if (!baud) | |
303 | baud = 9600; | |
304 | ||
305 | status = qt2_set_port_config(dev, port_priv->device_port, baud, | |
306 | new_lcr); | |
307 | if (status < 0) | |
308 | dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n", | |
309 | __func__, status); | |
310 | ||
311 | if (cflag & CRTSCTS) | |
312 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
313 | SERIAL_CRTSCTS, | |
314 | port_priv->device_port); | |
315 | else | |
316 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
317 | 0, port_priv->device_port); | |
318 | if (status < 0) | |
319 | dev_err(&port->dev, "%s - set HW flow control failed: %i\n", | |
320 | __func__, status); | |
321 | ||
322 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
323 | u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty))); | |
324 | ||
325 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
326 | x, port_priv->device_port); | |
327 | } else | |
328 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
329 | 0, port_priv->device_port); | |
330 | ||
331 | if (status < 0) | |
332 | dev_err(&port->dev, "%s - set SW flow control failed: %i\n", | |
333 | __func__, status); | |
334 | ||
335 | } | |
336 | ||
337 | static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) | |
338 | { | |
339 | struct usb_serial *serial; | |
f7a33e60 BP |
340 | struct qt2_port_private *port_priv; |
341 | u8 *data; | |
342 | u16 device_port; | |
343 | int status; | |
344 | unsigned long flags; | |
345 | ||
346 | device_port = (u16) (port->number - port->serial->minor); | |
347 | ||
348 | serial = port->serial; | |
349 | ||
350 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
351 | |
352 | /* set the port to RS232 mode */ | |
353 | status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR, | |
354 | QT2_QMCR_RS232, device_port); | |
355 | if (status < 0) { | |
356 | dev_err(&port->dev, | |
357 | "%s failed to set RS232 mode for port %i error %i\n", | |
358 | __func__, device_port, status); | |
359 | return status; | |
360 | } | |
361 | ||
362 | data = kzalloc(2, GFP_KERNEL); | |
363 | if (!data) | |
364 | return -ENOMEM; | |
365 | ||
366 | /* open the port */ | |
367 | status = usb_control_msg(serial->dev, | |
368 | usb_rcvctrlpipe(serial->dev, 0), | |
369 | QT_OPEN_CLOSE_CHANNEL, | |
370 | 0xc0, 0, | |
371 | device_port, data, 2, QT2_USB_TIMEOUT); | |
372 | ||
373 | if (status < 0) { | |
374 | dev_err(&port->dev, "%s - open port failed %i", __func__, | |
375 | status); | |
376 | kfree(data); | |
377 | return status; | |
378 | } | |
379 | ||
380 | spin_lock_irqsave(&port_priv->lock, flags); | |
381 | port_priv->shadowLSR = data[0]; | |
382 | port_priv->shadowMSR = data[1]; | |
383 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
384 | ||
385 | kfree(data); | |
386 | ||
387 | /* set to default speed and 8bit word size */ | |
388 | status = qt2_set_port_config(serial->dev, device_port, | |
389 | DEFAULT_BAUD_RATE, UART_LCR_WLEN8); | |
390 | if (status < 0) { | |
391 | dev_err(&port->dev, | |
392 | "%s - initial setup failed for port %i (%i)\n", | |
393 | __func__, port->number, device_port); | |
394 | return status; | |
395 | } | |
396 | ||
f7a33e60 BP |
397 | port_priv->device_port = (u8) device_port; |
398 | ||
399 | if (tty) | |
adc8d746 | 400 | qt2_set_termios(tty, port, &tty->termios); |
f7a33e60 BP |
401 | |
402 | return 0; | |
403 | ||
404 | } | |
405 | ||
406 | static void qt2_close(struct usb_serial_port *port) | |
407 | { | |
408 | struct usb_serial *serial; | |
f7a33e60 BP |
409 | struct qt2_port_private *port_priv; |
410 | unsigned long flags; | |
411 | int i; | |
412 | ||
413 | serial = port->serial; | |
f7a33e60 BP |
414 | port_priv = usb_get_serial_port_data(port); |
415 | ||
f7a33e60 | 416 | spin_lock_irqsave(&port_priv->urb_lock, flags); |
8e512ab0 | 417 | usb_kill_urb(port_priv->write_urb); |
f7a33e60 BP |
418 | port_priv->urb_in_use = false; |
419 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
420 | ||
421 | /* flush the port transmit buffer */ | |
422 | i = usb_control_msg(serial->dev, | |
423 | usb_rcvctrlpipe(serial->dev, 0), | |
424 | QT2_FLUSH_DEVICE, 0x40, 1, | |
425 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
426 | ||
427 | if (i < 0) | |
428 | dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n", | |
429 | __func__, i); | |
430 | ||
431 | /* flush the port receive buffer */ | |
432 | i = usb_control_msg(serial->dev, | |
433 | usb_rcvctrlpipe(serial->dev, 0), | |
434 | QT2_FLUSH_DEVICE, 0x40, 0, | |
435 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
436 | ||
437 | if (i < 0) | |
438 | dev_err(&port->dev, "%s - receive buffer flush failed: %i\n", | |
439 | __func__, i); | |
440 | ||
441 | /* close the port */ | |
442 | i = usb_control_msg(serial->dev, | |
443 | usb_sndctrlpipe(serial->dev, 0), | |
444 | QT_OPEN_CLOSE_CHANNEL, | |
445 | 0x40, 0, | |
446 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
447 | ||
448 | if (i < 0) | |
449 | dev_err(&port->dev, "%s - close port failed %i\n", | |
450 | __func__, i); | |
f7a33e60 BP |
451 | } |
452 | ||
453 | static void qt2_disconnect(struct usb_serial *serial) | |
454 | { | |
455 | struct qt2_serial_private *serial_priv = usb_get_serial_data(serial); | |
f7a33e60 | 456 | |
8e512ab0 | 457 | usb_kill_urb(serial_priv->read_urb); |
f7a33e60 BP |
458 | } |
459 | ||
460 | static int get_serial_info(struct usb_serial_port *port, | |
461 | struct serial_struct __user *retinfo) | |
462 | { | |
463 | struct serial_struct tmp; | |
464 | ||
465 | if (!retinfo) | |
466 | return -EFAULT; | |
467 | ||
468 | memset(&tmp, 0, sizeof(tmp)); | |
469 | tmp.line = port->serial->minor; | |
470 | tmp.port = 0; | |
471 | tmp.irq = 0; | |
472 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
473 | tmp.xmit_fifo_size = port->bulk_out_size; | |
474 | tmp.baud_base = 9600; | |
475 | tmp.close_delay = 5*HZ; | |
476 | tmp.closing_wait = 30*HZ; | |
477 | ||
478 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
479 | return -EFAULT; | |
480 | return 0; | |
481 | } | |
482 | ||
f7a33e60 BP |
483 | static int qt2_ioctl(struct tty_struct *tty, |
484 | unsigned int cmd, unsigned long arg) | |
485 | { | |
486 | struct usb_serial_port *port = tty->driver_data; | |
487 | ||
488 | switch (cmd) { | |
489 | case TIOCGSERIAL: | |
490 | return get_serial_info(port, | |
491 | (struct serial_struct __user *)arg); | |
f7a33e60 BP |
492 | default: |
493 | break; | |
494 | } | |
495 | ||
496 | return -ENOIOCTLCMD; | |
497 | } | |
498 | ||
499 | static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) | |
500 | { | |
501 | switch (*ch) { | |
502 | case QT2_LINE_STATUS: | |
503 | qt2_update_lsr(port, ch + 1); | |
504 | break; | |
505 | case QT2_MODEM_STATUS: | |
506 | qt2_update_msr(port, ch + 1); | |
507 | break; | |
508 | } | |
509 | } | |
510 | ||
511 | /* not needed, kept to document functionality */ | |
512 | static void qt2_process_xmit_empty(struct usb_serial_port *port, | |
513 | unsigned char *ch) | |
514 | { | |
515 | int bytes_written; | |
516 | ||
517 | bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4); | |
518 | } | |
519 | ||
520 | /* not needed, kept to document functionality */ | |
521 | static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch) | |
522 | { | |
523 | return; | |
524 | } | |
525 | ||
526 | void qt2_process_read_urb(struct urb *urb) | |
527 | { | |
528 | struct usb_serial *serial; | |
529 | struct qt2_serial_private *serial_priv; | |
530 | struct usb_serial_port *port; | |
531 | struct qt2_port_private *port_priv; | |
f7a33e60 BP |
532 | bool escapeflag; |
533 | unsigned char *ch; | |
534 | int i; | |
535 | unsigned char newport; | |
536 | int len = urb->actual_length; | |
537 | ||
538 | if (!len) | |
539 | return; | |
540 | ||
541 | ch = urb->transfer_buffer; | |
f7a33e60 BP |
542 | serial = urb->context; |
543 | serial_priv = usb_get_serial_data(serial); | |
544 | port = serial->port[serial_priv->current_port]; | |
545 | port_priv = usb_get_serial_port_data(port); | |
546 | ||
f7a33e60 BP |
547 | for (i = 0; i < urb->actual_length; i++) { |
548 | ch = (unsigned char *)urb->transfer_buffer + i; | |
549 | if ((i <= (len - 3)) && | |
550 | (*ch == QT2_CONTROL_BYTE) && | |
551 | (*(ch + 1) == QT2_CONTROL_BYTE)) { | |
552 | escapeflag = false; | |
553 | switch (*(ch + 2)) { | |
554 | case QT2_LINE_STATUS: | |
555 | case QT2_MODEM_STATUS: | |
556 | if (i > (len - 4)) { | |
557 | dev_warn(&port->dev, | |
558 | "%s - status message too short\n", | |
559 | __func__); | |
560 | break; | |
561 | } | |
562 | qt2_process_status(port, ch + 2); | |
563 | i += 3; | |
564 | escapeflag = true; | |
565 | break; | |
566 | case QT2_XMIT_HOLD: | |
567 | if (i > (len - 5)) { | |
568 | dev_warn(&port->dev, | |
569 | "%s - xmit_empty message too short\n", | |
570 | __func__); | |
571 | break; | |
572 | } | |
573 | qt2_process_xmit_empty(port, ch + 3); | |
574 | i += 4; | |
575 | escapeflag = true; | |
576 | break; | |
577 | case QT2_CHANGE_PORT: | |
578 | if (i > (len - 4)) { | |
579 | dev_warn(&port->dev, | |
580 | "%s - change_port message too short\n", | |
581 | __func__); | |
582 | break; | |
583 | } | |
2be818a1 | 584 | tty_flip_buffer_push(&port->port); |
f7a33e60 BP |
585 | |
586 | newport = *(ch + 3); | |
587 | ||
588 | if (newport > serial->num_ports) { | |
589 | dev_err(&port->dev, | |
590 | "%s - port change to invalid port: %i\n", | |
591 | __func__, newport); | |
592 | break; | |
593 | } | |
594 | ||
595 | serial_priv->current_port = newport; | |
596 | port = serial->port[serial_priv->current_port]; | |
597 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
598 | i += 3; |
599 | escapeflag = true; | |
600 | break; | |
601 | case QT2_REC_FLUSH: | |
602 | case QT2_XMIT_FLUSH: | |
603 | qt2_process_flush(port, ch + 2); | |
604 | i += 2; | |
605 | escapeflag = true; | |
606 | break; | |
607 | case QT2_CONTROL_ESCAPE: | |
227434f8 | 608 | tty_buffer_request_room(&port->port, 2); |
05c7cd39 | 609 | tty_insert_flip_string(&port->port, ch, 2); |
f7a33e60 BP |
610 | i += 2; |
611 | escapeflag = true; | |
612 | break; | |
613 | default: | |
614 | dev_warn(&port->dev, | |
615 | "%s - unsupported command %i\n", | |
616 | __func__, *(ch + 2)); | |
617 | break; | |
618 | } | |
619 | if (escapeflag) | |
620 | continue; | |
621 | } | |
622 | ||
05c7cd39 JS |
623 | tty_buffer_request_room(&port->port, 1); |
624 | tty_insert_flip_string(&port->port, ch, 1); | |
f7a33e60 BP |
625 | } |
626 | ||
2be818a1 | 627 | tty_flip_buffer_push(&port->port); |
f7a33e60 BP |
628 | } |
629 | ||
630 | static void qt2_write_bulk_callback(struct urb *urb) | |
631 | { | |
632 | struct usb_serial_port *port; | |
633 | struct qt2_port_private *port_priv; | |
634 | ||
635 | port = urb->context; | |
636 | port_priv = usb_get_serial_port_data(port); | |
637 | ||
638 | spin_lock(&port_priv->urb_lock); | |
639 | ||
640 | port_priv->urb_in_use = false; | |
641 | usb_serial_port_softint(port); | |
642 | ||
643 | spin_unlock(&port_priv->urb_lock); | |
644 | ||
645 | } | |
646 | ||
647 | static void qt2_read_bulk_callback(struct urb *urb) | |
648 | { | |
649 | struct usb_serial *serial = urb->context; | |
650 | int status; | |
651 | ||
652 | if (urb->status) { | |
653 | dev_warn(&serial->dev->dev, | |
654 | "%s - non-zero urb status: %i\n", __func__, | |
655 | urb->status); | |
656 | return; | |
657 | } | |
658 | ||
659 | qt2_process_read_urb(urb); | |
660 | ||
661 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
662 | if (status != 0) | |
663 | dev_err(&serial->dev->dev, | |
664 | "%s - resubmit read urb failed: %i\n", | |
665 | __func__, status); | |
666 | } | |
667 | ||
668 | static int qt2_setup_urbs(struct usb_serial *serial) | |
669 | { | |
f7a33e60 BP |
670 | struct usb_serial_port *port0; |
671 | struct qt2_serial_private *serial_priv; | |
40d04738 | 672 | int status; |
f7a33e60 BP |
673 | |
674 | port0 = serial->port[0]; | |
675 | ||
676 | serial_priv = usb_get_serial_data(serial); | |
677 | serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
678 | if (!serial_priv->read_urb) { | |
679 | dev_err(&serial->dev->dev, "No free urbs available\n"); | |
680 | return -ENOMEM; | |
681 | } | |
682 | ||
683 | usb_fill_bulk_urb(serial_priv->read_urb, serial->dev, | |
684 | usb_rcvbulkpipe(serial->dev, | |
685 | port0->bulk_in_endpointAddress), | |
686 | serial_priv->read_buffer, | |
687 | sizeof(serial_priv->read_buffer), | |
688 | qt2_read_bulk_callback, serial); | |
689 | ||
f7a33e60 BP |
690 | status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL); |
691 | if (status != 0) { | |
692 | dev_err(&serial->dev->dev, | |
693 | "%s - submit read urb failed %i\n", __func__, status); | |
b8a00550 | 694 | usb_free_urb(serial_priv->read_urb); |
f7a33e60 BP |
695 | return status; |
696 | } | |
697 | ||
698 | return 0; | |
f7a33e60 BP |
699 | } |
700 | ||
701 | static int qt2_attach(struct usb_serial *serial) | |
702 | { | |
703 | struct qt2_serial_private *serial_priv; | |
40d04738 | 704 | int status; |
f7a33e60 BP |
705 | |
706 | /* power on unit */ | |
707 | status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
708 | 0xc2, 0x40, 0x8000, 0, NULL, 0, | |
709 | QT2_USB_TIMEOUT); | |
710 | if (status < 0) { | |
711 | dev_err(&serial->dev->dev, | |
712 | "%s - failed to power on unit: %i\n", __func__, status); | |
713 | return status; | |
714 | } | |
715 | ||
716 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
717 | if (!serial_priv) { | |
718 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
719 | return -ENOMEM; | |
720 | } | |
721 | ||
722 | usb_set_serial_data(serial, serial_priv); | |
723 | ||
f7a33e60 BP |
724 | status = qt2_setup_urbs(serial); |
725 | if (status != 0) | |
726 | goto attach_failed; | |
727 | ||
728 | return 0; | |
729 | ||
730 | attach_failed: | |
f7a33e60 BP |
731 | kfree(serial_priv); |
732 | return status; | |
733 | } | |
734 | ||
40d04738 JH |
735 | static int qt2_port_probe(struct usb_serial_port *port) |
736 | { | |
737 | struct usb_serial *serial = port->serial; | |
738 | struct qt2_port_private *port_priv; | |
739 | u8 bEndpointAddress; | |
740 | ||
741 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); | |
742 | if (!port_priv) | |
743 | return -ENOMEM; | |
744 | ||
745 | spin_lock_init(&port_priv->lock); | |
746 | spin_lock_init(&port_priv->urb_lock); | |
40d04738 JH |
747 | port_priv->port = port; |
748 | ||
749 | port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
750 | if (!port_priv->write_urb) { | |
751 | kfree(port_priv); | |
752 | return -ENOMEM; | |
753 | } | |
754 | bEndpointAddress = serial->port[0]->bulk_out_endpointAddress; | |
755 | usb_fill_bulk_urb(port_priv->write_urb, serial->dev, | |
756 | usb_sndbulkpipe(serial->dev, bEndpointAddress), | |
757 | port_priv->write_buffer, | |
758 | sizeof(port_priv->write_buffer), | |
759 | qt2_write_bulk_callback, port); | |
760 | ||
761 | usb_set_serial_port_data(port, port_priv); | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | static int qt2_port_remove(struct usb_serial_port *port) | |
767 | { | |
768 | struct qt2_port_private *port_priv; | |
769 | ||
770 | port_priv = usb_get_serial_port_data(port); | |
771 | usb_free_urb(port_priv->write_urb); | |
772 | kfree(port_priv); | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
f7a33e60 BP |
777 | static int qt2_tiocmget(struct tty_struct *tty) |
778 | { | |
779 | struct usb_serial_port *port = tty->driver_data; | |
780 | struct usb_device *dev = port->serial->dev; | |
781 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
782 | u8 *d; | |
783 | int r; | |
784 | ||
785 | d = kzalloc(2, GFP_KERNEL); | |
786 | if (!d) | |
787 | return -ENOMEM; | |
788 | ||
789 | r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d); | |
790 | if (r < 0) | |
791 | goto mget_out; | |
792 | ||
793 | r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1); | |
794 | if (r < 0) | |
795 | goto mget_out; | |
796 | ||
797 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | | |
798 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
799 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
800 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
801 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
802 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
803 | ||
804 | mget_out: | |
805 | kfree(d); | |
806 | return r; | |
807 | } | |
808 | ||
809 | static int qt2_tiocmset(struct tty_struct *tty, | |
810 | unsigned int set, unsigned int clear) | |
811 | { | |
812 | struct qt2_port_private *port_priv; | |
813 | ||
814 | port_priv = usb_get_serial_port_data(tty->driver_data); | |
815 | return update_mctrl(port_priv, set, clear); | |
816 | } | |
817 | ||
818 | static void qt2_break_ctl(struct tty_struct *tty, int break_state) | |
819 | { | |
820 | struct usb_serial_port *port = tty->driver_data; | |
821 | struct qt2_port_private *port_priv; | |
822 | int status; | |
823 | u16 val; | |
824 | ||
825 | port_priv = usb_get_serial_port_data(port); | |
826 | ||
f7a33e60 BP |
827 | val = (break_state == -1) ? 1 : 0; |
828 | ||
829 | status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL, | |
830 | val, port_priv->device_port); | |
831 | if (status < 0) | |
832 | dev_warn(&port->dev, | |
833 | "%s - failed to send control message: %i\n", __func__, | |
834 | status); | |
835 | } | |
836 | ||
837 | ||
838 | ||
839 | static void qt2_dtr_rts(struct usb_serial_port *port, int on) | |
840 | { | |
841 | struct usb_device *dev = port->serial->dev; | |
842 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
843 | ||
b2ca6990 JH |
844 | /* Disable flow control */ |
845 | if (!on) { | |
846 | if (qt2_setregister(dev, port_priv->device_port, | |
f7a33e60 BP |
847 | UART_MCR, 0) < 0) |
848 | dev_warn(&port->dev, "error from flowcontrol urb\n"); | |
f7a33e60 | 849 | } |
b2ca6990 JH |
850 | /* drop RTS and DTR */ |
851 | if (on) | |
852 | update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0); | |
853 | else | |
854 | update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS); | |
f7a33e60 BP |
855 | } |
856 | ||
857 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch) | |
858 | { | |
859 | struct qt2_port_private *port_priv; | |
860 | u8 newMSR = (u8) *ch; | |
861 | unsigned long flags; | |
862 | ||
863 | port_priv = usb_get_serial_port_data(port); | |
864 | ||
865 | spin_lock_irqsave(&port_priv->lock, flags); | |
866 | port_priv->shadowMSR = newMSR; | |
867 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
868 | ||
869 | if (newMSR & UART_MSR_ANY_DELTA) { | |
870 | /* update input line counters */ | |
871 | if (newMSR & UART_MSR_DCTS) | |
0a4142fb | 872 | port->icount.cts++; |
f7a33e60 | 873 | if (newMSR & UART_MSR_DDSR) |
0a4142fb | 874 | port->icount.dsr++; |
f7a33e60 | 875 | if (newMSR & UART_MSR_DDCD) |
0a4142fb | 876 | port->icount.dcd++; |
f7a33e60 | 877 | if (newMSR & UART_MSR_TERI) |
0a4142fb | 878 | port->icount.rng++; |
f7a33e60 | 879 | |
b5959704 | 880 | wake_up_interruptible(&port->port.delta_msr_wait); |
f7a33e60 BP |
881 | } |
882 | } | |
883 | ||
884 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch) | |
885 | { | |
886 | struct qt2_port_private *port_priv; | |
887 | struct async_icount *icount; | |
888 | unsigned long flags; | |
889 | u8 newLSR = (u8) *ch; | |
890 | ||
891 | port_priv = usb_get_serial_port_data(port); | |
892 | ||
893 | if (newLSR & UART_LSR_BI) | |
894 | newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI); | |
895 | ||
896 | spin_lock_irqsave(&port_priv->lock, flags); | |
897 | port_priv->shadowLSR = newLSR; | |
898 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
899 | ||
0a4142fb | 900 | icount = &port->icount; |
f7a33e60 BP |
901 | |
902 | if (newLSR & UART_LSR_BRK_ERROR_BITS) { | |
903 | ||
904 | if (newLSR & UART_LSR_BI) | |
905 | icount->brk++; | |
906 | ||
907 | if (newLSR & UART_LSR_OE) | |
908 | icount->overrun++; | |
909 | ||
910 | if (newLSR & UART_LSR_PE) | |
911 | icount->parity++; | |
912 | ||
913 | if (newLSR & UART_LSR_FE) | |
914 | icount->frame++; | |
915 | } | |
916 | ||
917 | } | |
918 | ||
919 | static int qt2_write_room(struct tty_struct *tty) | |
920 | { | |
921 | struct usb_serial_port *port = tty->driver_data; | |
922 | struct qt2_port_private *port_priv; | |
923 | unsigned long flags = 0; | |
924 | int r; | |
925 | ||
926 | port_priv = usb_get_serial_port_data(port); | |
927 | ||
928 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
929 | ||
930 | if (port_priv->urb_in_use) | |
931 | r = 0; | |
932 | else | |
933 | r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE; | |
934 | ||
935 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
936 | ||
937 | return r; | |
938 | } | |
939 | ||
940 | static int qt2_write(struct tty_struct *tty, | |
941 | struct usb_serial_port *port, | |
942 | const unsigned char *buf, int count) | |
943 | { | |
944 | struct qt2_port_private *port_priv; | |
945 | struct urb *write_urb; | |
946 | unsigned char *data; | |
947 | unsigned long flags; | |
948 | int status; | |
949 | int bytes_out = 0; | |
950 | ||
951 | port_priv = usb_get_serial_port_data(port); | |
952 | ||
953 | if (port_priv->write_urb == NULL) { | |
954 | dev_err(&port->dev, "%s - no output urb\n", __func__); | |
955 | return 0; | |
956 | } | |
957 | write_urb = port_priv->write_urb; | |
958 | ||
959 | count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE); | |
960 | ||
961 | data = write_urb->transfer_buffer; | |
962 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
963 | if (port_priv->urb_in_use == true) { | |
788a661a | 964 | dev_err(&port->dev, "qt2_write - urb is in use\n"); |
f7a33e60 BP |
965 | goto write_out; |
966 | } | |
967 | ||
968 | *data++ = QT2_CONTROL_BYTE; | |
969 | *data++ = QT2_CONTROL_BYTE; | |
970 | *data++ = port_priv->device_port; | |
971 | put_unaligned_le16(count, data); | |
972 | data += 2; | |
973 | memcpy(data, buf, count); | |
974 | ||
975 | write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE; | |
976 | ||
977 | status = usb_submit_urb(write_urb, GFP_ATOMIC); | |
978 | if (status == 0) { | |
979 | port_priv->urb_in_use = true; | |
980 | bytes_out += count; | |
981 | } | |
982 | ||
983 | write_out: | |
984 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
985 | return bytes_out; | |
986 | } | |
987 | ||
988 | ||
989 | static struct usb_serial_driver qt2_device = { | |
990 | .driver = { | |
991 | .owner = THIS_MODULE, | |
992 | .name = "quatech-serial", | |
993 | }, | |
994 | .description = DRIVER_DESC, | |
995 | .id_table = id_table, | |
996 | .open = qt2_open, | |
997 | .close = qt2_close, | |
998 | .write = qt2_write, | |
999 | .write_room = qt2_write_room, | |
1000 | .calc_num_ports = qt2_calc_num_ports, | |
1001 | .attach = qt2_attach, | |
1002 | .release = qt2_release, | |
1003 | .disconnect = qt2_disconnect, | |
40d04738 JH |
1004 | .port_probe = qt2_port_probe, |
1005 | .port_remove = qt2_port_remove, | |
f7a33e60 BP |
1006 | .dtr_rts = qt2_dtr_rts, |
1007 | .break_ctl = qt2_break_ctl, | |
1008 | .tiocmget = qt2_tiocmget, | |
1009 | .tiocmset = qt2_tiocmset, | |
b5959704 | 1010 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
0a4142fb | 1011 | .get_icount = usb_serial_generic_get_icount, |
f7a33e60 BP |
1012 | .ioctl = qt2_ioctl, |
1013 | .set_termios = qt2_set_termios, | |
1014 | }; | |
1015 | ||
1016 | static struct usb_serial_driver *const serial_drivers[] = { | |
1017 | &qt2_device, NULL | |
1018 | }; | |
1019 | ||
1020 | module_usb_serial_driver(serial_drivers, id_table); | |
1021 | ||
1022 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1023 | MODULE_LICENSE("GPL"); |