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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 | ||
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 | ||
1143832e | 346 | device_port = port->port_number; |
f7a33e60 BP |
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) { | |
1143832e GKH |
391 | dev_err(&port->dev, "%s - initial setup failed (%i)\n", |
392 | __func__, device_port); | |
f7a33e60 BP |
393 | return status; |
394 | } | |
395 | ||
f7a33e60 BP |
396 | port_priv->device_port = (u8) device_port; |
397 | ||
398 | if (tty) | |
adc8d746 | 399 | qt2_set_termios(tty, port, &tty->termios); |
f7a33e60 BP |
400 | |
401 | return 0; | |
402 | ||
403 | } | |
404 | ||
405 | static void qt2_close(struct usb_serial_port *port) | |
406 | { | |
407 | struct usb_serial *serial; | |
f7a33e60 BP |
408 | struct qt2_port_private *port_priv; |
409 | unsigned long flags; | |
410 | int i; | |
411 | ||
412 | serial = port->serial; | |
f7a33e60 BP |
413 | port_priv = usb_get_serial_port_data(port); |
414 | ||
f7a33e60 | 415 | spin_lock_irqsave(&port_priv->urb_lock, flags); |
8e512ab0 | 416 | usb_kill_urb(port_priv->write_urb); |
f7a33e60 BP |
417 | port_priv->urb_in_use = false; |
418 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
419 | ||
420 | /* flush the port transmit buffer */ | |
421 | i = usb_control_msg(serial->dev, | |
422 | usb_rcvctrlpipe(serial->dev, 0), | |
423 | QT2_FLUSH_DEVICE, 0x40, 1, | |
424 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
425 | ||
426 | if (i < 0) | |
427 | dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n", | |
428 | __func__, i); | |
429 | ||
430 | /* flush the port receive buffer */ | |
431 | i = usb_control_msg(serial->dev, | |
432 | usb_rcvctrlpipe(serial->dev, 0), | |
433 | QT2_FLUSH_DEVICE, 0x40, 0, | |
434 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
435 | ||
436 | if (i < 0) | |
437 | dev_err(&port->dev, "%s - receive buffer flush failed: %i\n", | |
438 | __func__, i); | |
439 | ||
440 | /* close the port */ | |
441 | i = usb_control_msg(serial->dev, | |
442 | usb_sndctrlpipe(serial->dev, 0), | |
443 | QT_OPEN_CLOSE_CHANNEL, | |
444 | 0x40, 0, | |
445 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
446 | ||
447 | if (i < 0) | |
448 | dev_err(&port->dev, "%s - close port failed %i\n", | |
449 | __func__, i); | |
f7a33e60 BP |
450 | } |
451 | ||
452 | static void qt2_disconnect(struct usb_serial *serial) | |
453 | { | |
454 | struct qt2_serial_private *serial_priv = usb_get_serial_data(serial); | |
f7a33e60 | 455 | |
8e512ab0 | 456 | usb_kill_urb(serial_priv->read_urb); |
f7a33e60 BP |
457 | } |
458 | ||
459 | static int get_serial_info(struct usb_serial_port *port, | |
460 | struct serial_struct __user *retinfo) | |
461 | { | |
462 | struct serial_struct tmp; | |
463 | ||
464 | if (!retinfo) | |
465 | return -EFAULT; | |
466 | ||
467 | memset(&tmp, 0, sizeof(tmp)); | |
468 | tmp.line = port->serial->minor; | |
469 | tmp.port = 0; | |
470 | tmp.irq = 0; | |
471 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
472 | tmp.xmit_fifo_size = port->bulk_out_size; | |
473 | tmp.baud_base = 9600; | |
474 | tmp.close_delay = 5*HZ; | |
475 | tmp.closing_wait = 30*HZ; | |
476 | ||
477 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
478 | return -EFAULT; | |
479 | return 0; | |
480 | } | |
481 | ||
f7a33e60 BP |
482 | static int qt2_ioctl(struct tty_struct *tty, |
483 | unsigned int cmd, unsigned long arg) | |
484 | { | |
485 | struct usb_serial_port *port = tty->driver_data; | |
486 | ||
487 | switch (cmd) { | |
488 | case TIOCGSERIAL: | |
489 | return get_serial_info(port, | |
490 | (struct serial_struct __user *)arg); | |
f7a33e60 BP |
491 | default: |
492 | break; | |
493 | } | |
494 | ||
495 | return -ENOIOCTLCMD; | |
496 | } | |
497 | ||
498 | static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) | |
499 | { | |
500 | switch (*ch) { | |
501 | case QT2_LINE_STATUS: | |
502 | qt2_update_lsr(port, ch + 1); | |
503 | break; | |
504 | case QT2_MODEM_STATUS: | |
505 | qt2_update_msr(port, ch + 1); | |
506 | break; | |
507 | } | |
508 | } | |
509 | ||
510 | /* not needed, kept to document functionality */ | |
511 | static void qt2_process_xmit_empty(struct usb_serial_port *port, | |
512 | unsigned char *ch) | |
513 | { | |
514 | int bytes_written; | |
515 | ||
516 | bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4); | |
517 | } | |
518 | ||
519 | /* not needed, kept to document functionality */ | |
520 | static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch) | |
521 | { | |
522 | return; | |
523 | } | |
524 | ||
0e357899 | 525 | static void qt2_process_read_urb(struct urb *urb) |
f7a33e60 BP |
526 | { |
527 | struct usb_serial *serial; | |
528 | struct qt2_serial_private *serial_priv; | |
529 | struct usb_serial_port *port; | |
530 | struct qt2_port_private *port_priv; | |
f7a33e60 BP |
531 | bool escapeflag; |
532 | unsigned char *ch; | |
533 | int i; | |
534 | unsigned char newport; | |
535 | int len = urb->actual_length; | |
536 | ||
537 | if (!len) | |
538 | return; | |
539 | ||
540 | ch = urb->transfer_buffer; | |
f7a33e60 BP |
541 | serial = urb->context; |
542 | serial_priv = usb_get_serial_data(serial); | |
543 | port = serial->port[serial_priv->current_port]; | |
544 | port_priv = usb_get_serial_port_data(port); | |
545 | ||
f7a33e60 BP |
546 | for (i = 0; i < urb->actual_length; i++) { |
547 | ch = (unsigned char *)urb->transfer_buffer + i; | |
548 | if ((i <= (len - 3)) && | |
549 | (*ch == QT2_CONTROL_BYTE) && | |
550 | (*(ch + 1) == QT2_CONTROL_BYTE)) { | |
551 | escapeflag = false; | |
552 | switch (*(ch + 2)) { | |
553 | case QT2_LINE_STATUS: | |
554 | case QT2_MODEM_STATUS: | |
555 | if (i > (len - 4)) { | |
556 | dev_warn(&port->dev, | |
557 | "%s - status message too short\n", | |
558 | __func__); | |
559 | break; | |
560 | } | |
561 | qt2_process_status(port, ch + 2); | |
562 | i += 3; | |
563 | escapeflag = true; | |
564 | break; | |
565 | case QT2_XMIT_HOLD: | |
566 | if (i > (len - 5)) { | |
567 | dev_warn(&port->dev, | |
568 | "%s - xmit_empty message too short\n", | |
569 | __func__); | |
570 | break; | |
571 | } | |
572 | qt2_process_xmit_empty(port, ch + 3); | |
573 | i += 4; | |
574 | escapeflag = true; | |
575 | break; | |
576 | case QT2_CHANGE_PORT: | |
577 | if (i > (len - 4)) { | |
578 | dev_warn(&port->dev, | |
579 | "%s - change_port message too short\n", | |
580 | __func__); | |
581 | break; | |
582 | } | |
2be818a1 | 583 | tty_flip_buffer_push(&port->port); |
f7a33e60 BP |
584 | |
585 | newport = *(ch + 3); | |
586 | ||
587 | if (newport > serial->num_ports) { | |
588 | dev_err(&port->dev, | |
589 | "%s - port change to invalid port: %i\n", | |
590 | __func__, newport); | |
591 | break; | |
592 | } | |
593 | ||
594 | serial_priv->current_port = newport; | |
595 | port = serial->port[serial_priv->current_port]; | |
596 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
597 | i += 3; |
598 | escapeflag = true; | |
599 | break; | |
600 | case QT2_REC_FLUSH: | |
601 | case QT2_XMIT_FLUSH: | |
602 | qt2_process_flush(port, ch + 2); | |
603 | i += 2; | |
604 | escapeflag = true; | |
605 | break; | |
606 | case QT2_CONTROL_ESCAPE: | |
227434f8 | 607 | tty_buffer_request_room(&port->port, 2); |
05c7cd39 | 608 | tty_insert_flip_string(&port->port, ch, 2); |
f7a33e60 BP |
609 | i += 2; |
610 | escapeflag = true; | |
611 | break; | |
612 | default: | |
613 | dev_warn(&port->dev, | |
614 | "%s - unsupported command %i\n", | |
615 | __func__, *(ch + 2)); | |
616 | break; | |
617 | } | |
618 | if (escapeflag) | |
619 | continue; | |
620 | } | |
621 | ||
05c7cd39 JS |
622 | tty_buffer_request_room(&port->port, 1); |
623 | tty_insert_flip_string(&port->port, ch, 1); | |
f7a33e60 BP |
624 | } |
625 | ||
2be818a1 | 626 | tty_flip_buffer_push(&port->port); |
f7a33e60 BP |
627 | } |
628 | ||
629 | static void qt2_write_bulk_callback(struct urb *urb) | |
630 | { | |
631 | struct usb_serial_port *port; | |
632 | struct qt2_port_private *port_priv; | |
633 | ||
634 | port = urb->context; | |
635 | port_priv = usb_get_serial_port_data(port); | |
636 | ||
637 | spin_lock(&port_priv->urb_lock); | |
638 | ||
639 | port_priv->urb_in_use = false; | |
640 | usb_serial_port_softint(port); | |
641 | ||
642 | spin_unlock(&port_priv->urb_lock); | |
643 | ||
644 | } | |
645 | ||
646 | static void qt2_read_bulk_callback(struct urb *urb) | |
647 | { | |
648 | struct usb_serial *serial = urb->context; | |
649 | int status; | |
650 | ||
651 | if (urb->status) { | |
652 | dev_warn(&serial->dev->dev, | |
653 | "%s - non-zero urb status: %i\n", __func__, | |
654 | urb->status); | |
655 | return; | |
656 | } | |
657 | ||
658 | qt2_process_read_urb(urb); | |
659 | ||
660 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
661 | if (status != 0) | |
662 | dev_err(&serial->dev->dev, | |
663 | "%s - resubmit read urb failed: %i\n", | |
664 | __func__, status); | |
665 | } | |
666 | ||
667 | static int qt2_setup_urbs(struct usb_serial *serial) | |
668 | { | |
f7a33e60 BP |
669 | struct usb_serial_port *port0; |
670 | struct qt2_serial_private *serial_priv; | |
40d04738 | 671 | int status; |
f7a33e60 BP |
672 | |
673 | port0 = serial->port[0]; | |
674 | ||
675 | serial_priv = usb_get_serial_data(serial); | |
676 | serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
677 | if (!serial_priv->read_urb) { | |
678 | dev_err(&serial->dev->dev, "No free urbs available\n"); | |
679 | return -ENOMEM; | |
680 | } | |
681 | ||
682 | usb_fill_bulk_urb(serial_priv->read_urb, serial->dev, | |
683 | usb_rcvbulkpipe(serial->dev, | |
684 | port0->bulk_in_endpointAddress), | |
685 | serial_priv->read_buffer, | |
686 | sizeof(serial_priv->read_buffer), | |
687 | qt2_read_bulk_callback, serial); | |
688 | ||
f7a33e60 BP |
689 | status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL); |
690 | if (status != 0) { | |
691 | dev_err(&serial->dev->dev, | |
692 | "%s - submit read urb failed %i\n", __func__, status); | |
b8a00550 | 693 | usb_free_urb(serial_priv->read_urb); |
f7a33e60 BP |
694 | return status; |
695 | } | |
696 | ||
697 | return 0; | |
f7a33e60 BP |
698 | } |
699 | ||
700 | static int qt2_attach(struct usb_serial *serial) | |
701 | { | |
702 | struct qt2_serial_private *serial_priv; | |
40d04738 | 703 | int status; |
f7a33e60 BP |
704 | |
705 | /* power on unit */ | |
706 | status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
707 | 0xc2, 0x40, 0x8000, 0, NULL, 0, | |
708 | QT2_USB_TIMEOUT); | |
709 | if (status < 0) { | |
710 | dev_err(&serial->dev->dev, | |
711 | "%s - failed to power on unit: %i\n", __func__, status); | |
712 | return status; | |
713 | } | |
714 | ||
715 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
716 | if (!serial_priv) { | |
717 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
718 | return -ENOMEM; | |
719 | } | |
720 | ||
721 | usb_set_serial_data(serial, serial_priv); | |
722 | ||
f7a33e60 BP |
723 | status = qt2_setup_urbs(serial); |
724 | if (status != 0) | |
725 | goto attach_failed; | |
726 | ||
727 | return 0; | |
728 | ||
729 | attach_failed: | |
f7a33e60 BP |
730 | kfree(serial_priv); |
731 | return status; | |
732 | } | |
733 | ||
40d04738 JH |
734 | static int qt2_port_probe(struct usb_serial_port *port) |
735 | { | |
736 | struct usb_serial *serial = port->serial; | |
737 | struct qt2_port_private *port_priv; | |
738 | u8 bEndpointAddress; | |
739 | ||
740 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); | |
741 | if (!port_priv) | |
742 | return -ENOMEM; | |
743 | ||
744 | spin_lock_init(&port_priv->lock); | |
745 | spin_lock_init(&port_priv->urb_lock); | |
40d04738 JH |
746 | port_priv->port = port; |
747 | ||
748 | port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
749 | if (!port_priv->write_urb) { | |
750 | kfree(port_priv); | |
751 | return -ENOMEM; | |
752 | } | |
753 | bEndpointAddress = serial->port[0]->bulk_out_endpointAddress; | |
754 | usb_fill_bulk_urb(port_priv->write_urb, serial->dev, | |
755 | usb_sndbulkpipe(serial->dev, bEndpointAddress), | |
756 | port_priv->write_buffer, | |
757 | sizeof(port_priv->write_buffer), | |
758 | qt2_write_bulk_callback, port); | |
759 | ||
760 | usb_set_serial_port_data(port, port_priv); | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | static int qt2_port_remove(struct usb_serial_port *port) | |
766 | { | |
767 | struct qt2_port_private *port_priv; | |
768 | ||
769 | port_priv = usb_get_serial_port_data(port); | |
770 | usb_free_urb(port_priv->write_urb); | |
771 | kfree(port_priv); | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
f7a33e60 BP |
776 | static int qt2_tiocmget(struct tty_struct *tty) |
777 | { | |
778 | struct usb_serial_port *port = tty->driver_data; | |
779 | struct usb_device *dev = port->serial->dev; | |
780 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
781 | u8 *d; | |
782 | int r; | |
783 | ||
784 | d = kzalloc(2, GFP_KERNEL); | |
785 | if (!d) | |
786 | return -ENOMEM; | |
787 | ||
788 | r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d); | |
789 | if (r < 0) | |
790 | goto mget_out; | |
791 | ||
792 | r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1); | |
793 | if (r < 0) | |
794 | goto mget_out; | |
795 | ||
796 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | | |
797 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
798 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
799 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
800 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
801 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
802 | ||
803 | mget_out: | |
804 | kfree(d); | |
805 | return r; | |
806 | } | |
807 | ||
808 | static int qt2_tiocmset(struct tty_struct *tty, | |
809 | unsigned int set, unsigned int clear) | |
810 | { | |
811 | struct qt2_port_private *port_priv; | |
812 | ||
813 | port_priv = usb_get_serial_port_data(tty->driver_data); | |
814 | return update_mctrl(port_priv, set, clear); | |
815 | } | |
816 | ||
817 | static void qt2_break_ctl(struct tty_struct *tty, int break_state) | |
818 | { | |
819 | struct usb_serial_port *port = tty->driver_data; | |
820 | struct qt2_port_private *port_priv; | |
821 | int status; | |
822 | u16 val; | |
823 | ||
824 | port_priv = usb_get_serial_port_data(port); | |
825 | ||
f7a33e60 BP |
826 | val = (break_state == -1) ? 1 : 0; |
827 | ||
828 | status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL, | |
829 | val, port_priv->device_port); | |
830 | if (status < 0) | |
831 | dev_warn(&port->dev, | |
832 | "%s - failed to send control message: %i\n", __func__, | |
833 | status); | |
834 | } | |
835 | ||
836 | ||
837 | ||
838 | static void qt2_dtr_rts(struct usb_serial_port *port, int on) | |
839 | { | |
840 | struct usb_device *dev = port->serial->dev; | |
841 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
842 | ||
b2ca6990 JH |
843 | /* Disable flow control */ |
844 | if (!on) { | |
845 | if (qt2_setregister(dev, port_priv->device_port, | |
f7a33e60 BP |
846 | UART_MCR, 0) < 0) |
847 | dev_warn(&port->dev, "error from flowcontrol urb\n"); | |
f7a33e60 | 848 | } |
b2ca6990 JH |
849 | /* drop RTS and DTR */ |
850 | if (on) | |
851 | update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0); | |
852 | else | |
853 | update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS); | |
f7a33e60 BP |
854 | } |
855 | ||
856 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch) | |
857 | { | |
858 | struct qt2_port_private *port_priv; | |
859 | u8 newMSR = (u8) *ch; | |
860 | unsigned long flags; | |
861 | ||
862 | port_priv = usb_get_serial_port_data(port); | |
863 | ||
864 | spin_lock_irqsave(&port_priv->lock, flags); | |
865 | port_priv->shadowMSR = newMSR; | |
866 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
867 | ||
868 | if (newMSR & UART_MSR_ANY_DELTA) { | |
869 | /* update input line counters */ | |
870 | if (newMSR & UART_MSR_DCTS) | |
0a4142fb | 871 | port->icount.cts++; |
f7a33e60 | 872 | if (newMSR & UART_MSR_DDSR) |
0a4142fb | 873 | port->icount.dsr++; |
f7a33e60 | 874 | if (newMSR & UART_MSR_DDCD) |
0a4142fb | 875 | port->icount.dcd++; |
f7a33e60 | 876 | if (newMSR & UART_MSR_TERI) |
0a4142fb | 877 | port->icount.rng++; |
f7a33e60 | 878 | |
b5959704 | 879 | wake_up_interruptible(&port->port.delta_msr_wait); |
f7a33e60 BP |
880 | } |
881 | } | |
882 | ||
883 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch) | |
884 | { | |
885 | struct qt2_port_private *port_priv; | |
886 | struct async_icount *icount; | |
887 | unsigned long flags; | |
888 | u8 newLSR = (u8) *ch; | |
889 | ||
890 | port_priv = usb_get_serial_port_data(port); | |
891 | ||
892 | if (newLSR & UART_LSR_BI) | |
893 | newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI); | |
894 | ||
895 | spin_lock_irqsave(&port_priv->lock, flags); | |
896 | port_priv->shadowLSR = newLSR; | |
897 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
898 | ||
0a4142fb | 899 | icount = &port->icount; |
f7a33e60 BP |
900 | |
901 | if (newLSR & UART_LSR_BRK_ERROR_BITS) { | |
902 | ||
903 | if (newLSR & UART_LSR_BI) | |
904 | icount->brk++; | |
905 | ||
906 | if (newLSR & UART_LSR_OE) | |
907 | icount->overrun++; | |
908 | ||
909 | if (newLSR & UART_LSR_PE) | |
910 | icount->parity++; | |
911 | ||
912 | if (newLSR & UART_LSR_FE) | |
913 | icount->frame++; | |
914 | } | |
915 | ||
916 | } | |
917 | ||
918 | static int qt2_write_room(struct tty_struct *tty) | |
919 | { | |
920 | struct usb_serial_port *port = tty->driver_data; | |
921 | struct qt2_port_private *port_priv; | |
922 | unsigned long flags = 0; | |
923 | int r; | |
924 | ||
925 | port_priv = usb_get_serial_port_data(port); | |
926 | ||
927 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
928 | ||
929 | if (port_priv->urb_in_use) | |
930 | r = 0; | |
931 | else | |
932 | r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE; | |
933 | ||
934 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
935 | ||
936 | return r; | |
937 | } | |
938 | ||
939 | static int qt2_write(struct tty_struct *tty, | |
940 | struct usb_serial_port *port, | |
941 | const unsigned char *buf, int count) | |
942 | { | |
943 | struct qt2_port_private *port_priv; | |
944 | struct urb *write_urb; | |
945 | unsigned char *data; | |
946 | unsigned long flags; | |
947 | int status; | |
948 | int bytes_out = 0; | |
949 | ||
950 | port_priv = usb_get_serial_port_data(port); | |
951 | ||
952 | if (port_priv->write_urb == NULL) { | |
953 | dev_err(&port->dev, "%s - no output urb\n", __func__); | |
954 | return 0; | |
955 | } | |
956 | write_urb = port_priv->write_urb; | |
957 | ||
958 | count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE); | |
959 | ||
960 | data = write_urb->transfer_buffer; | |
961 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
962 | if (port_priv->urb_in_use == true) { | |
788a661a | 963 | dev_err(&port->dev, "qt2_write - urb is in use\n"); |
f7a33e60 BP |
964 | goto write_out; |
965 | } | |
966 | ||
967 | *data++ = QT2_CONTROL_BYTE; | |
968 | *data++ = QT2_CONTROL_BYTE; | |
969 | *data++ = port_priv->device_port; | |
970 | put_unaligned_le16(count, data); | |
971 | data += 2; | |
972 | memcpy(data, buf, count); | |
973 | ||
974 | write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE; | |
975 | ||
976 | status = usb_submit_urb(write_urb, GFP_ATOMIC); | |
977 | if (status == 0) { | |
978 | port_priv->urb_in_use = true; | |
979 | bytes_out += count; | |
980 | } | |
981 | ||
982 | write_out: | |
983 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
984 | return bytes_out; | |
985 | } | |
986 | ||
987 | ||
988 | static struct usb_serial_driver qt2_device = { | |
989 | .driver = { | |
990 | .owner = THIS_MODULE, | |
991 | .name = "quatech-serial", | |
992 | }, | |
993 | .description = DRIVER_DESC, | |
994 | .id_table = id_table, | |
995 | .open = qt2_open, | |
996 | .close = qt2_close, | |
997 | .write = qt2_write, | |
998 | .write_room = qt2_write_room, | |
999 | .calc_num_ports = qt2_calc_num_ports, | |
1000 | .attach = qt2_attach, | |
1001 | .release = qt2_release, | |
1002 | .disconnect = qt2_disconnect, | |
40d04738 JH |
1003 | .port_probe = qt2_port_probe, |
1004 | .port_remove = qt2_port_remove, | |
f7a33e60 BP |
1005 | .dtr_rts = qt2_dtr_rts, |
1006 | .break_ctl = qt2_break_ctl, | |
1007 | .tiocmget = qt2_tiocmget, | |
1008 | .tiocmset = qt2_tiocmset, | |
b5959704 | 1009 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
0a4142fb | 1010 | .get_icount = usb_serial_generic_get_icount, |
f7a33e60 BP |
1011 | .ioctl = qt2_ioctl, |
1012 | .set_termios = qt2_set_termios, | |
1013 | }; | |
1014 | ||
1015 | static struct usb_serial_driver *const serial_drivers[] = { | |
1016 | &qt2_device, NULL | |
1017 | }; | |
1018 | ||
1019 | module_usb_serial_driver(serial_drivers, id_table); | |
1020 | ||
1021 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1022 | MODULE_LICENSE("GPL"); |