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> | |
f7a33e60 BP |
18 | #include <linux/slab.h> |
19 | #include <linux/tty.h> | |
20 | #include <linux/tty_driver.h> | |
21 | #include <linux/tty_flip.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/serial.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/usb/serial.h> | |
26 | #include <linux/serial_reg.h> | |
27 | #include <linux/uaccess.h> | |
28 | ||
f7a33e60 BP |
29 | /* default urb timeout for usb operations */ |
30 | #define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT | |
31 | ||
32 | #define QT_OPEN_CLOSE_CHANNEL 0xca | |
33 | #define QT_SET_GET_DEVICE 0xc2 | |
34 | #define QT_SET_GET_REGISTER 0xc0 | |
35 | #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc | |
36 | #define QT_SET_ATF 0xcd | |
37 | #define QT_TRANSFER_IN 0xc0 | |
38 | #define QT_HW_FLOW_CONTROL_MASK 0xc5 | |
39 | #define QT_SW_FLOW_CONTROL_MASK 0xc6 | |
40 | #define QT2_BREAK_CONTROL 0xc8 | |
41 | #define QT2_GET_SET_UART 0xc1 | |
42 | #define QT2_FLUSH_DEVICE 0xc4 | |
43 | #define QT2_GET_SET_QMCR 0xe1 | |
44 | #define QT2_QMCR_RS232 0x40 | |
45 | #define QT2_QMCR_RS422 0x10 | |
46 | ||
47 | #define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS) | |
48 | ||
49 | #define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR) | |
50 | ||
51 | /* status bytes for the device */ | |
52 | #define QT2_CONTROL_BYTE 0x1b | |
53 | #define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */ | |
54 | #define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */ | |
55 | #define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */ | |
56 | #define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */ | |
57 | #define QT2_REC_FLUSH 0x04 /* no following info */ | |
58 | #define QT2_XMIT_FLUSH 0x05 /* no following info */ | |
59 | #define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */ | |
60 | ||
61 | #define MAX_BAUD_RATE 921600 | |
62 | #define DEFAULT_BAUD_RATE 9600 | |
63 | ||
04480671 | 64 | #define QT2_READ_BUFFER_SIZE 512 /* size of read buffer */ |
f7a33e60 BP |
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 */ | |
04480671 | 115 | char *read_buffer; |
f7a33e60 BP |
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; | |
cbf30a91 | 124 | char *write_buffer; |
f7a33e60 BP |
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 | |
028c49f5 | 144 | usb_kill_urb(serial_priv->read_urb); |
40d04738 | 145 | usb_free_urb(serial_priv->read_urb); |
04480671 | 146 | kfree(serial_priv->read_buffer); |
40d04738 | 147 | kfree(serial_priv); |
f7a33e60 BP |
148 | } |
149 | ||
150 | static inline int calc_baud_divisor(int baudrate) | |
151 | { | |
152 | int divisor, rem; | |
153 | ||
154 | divisor = MAX_BAUD_RATE / baudrate; | |
155 | rem = MAX_BAUD_RATE % baudrate; | |
156 | /* Round to nearest divisor */ | |
157 | if (((rem * 2) >= baudrate) && (baudrate != 110)) | |
158 | divisor++; | |
159 | ||
160 | return divisor; | |
161 | } | |
162 | ||
163 | static inline int qt2_set_port_config(struct usb_device *dev, | |
164 | unsigned char port_number, | |
165 | u16 baudrate, u16 lcr) | |
166 | { | |
167 | int divisor = calc_baud_divisor(baudrate); | |
168 | u16 index = ((u16) (lcr << 8) | (u16) (port_number)); | |
169 | ||
170 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
171 | QT2_GET_SET_UART, 0x40, | |
172 | divisor, index, NULL, 0, QT2_USB_TIMEOUT); | |
173 | } | |
174 | ||
175 | static inline int qt2_control_msg(struct usb_device *dev, | |
176 | u8 request, u16 data, u16 index) | |
177 | { | |
178 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
179 | request, 0x40, data, index, | |
180 | NULL, 0, QT2_USB_TIMEOUT); | |
181 | } | |
182 | ||
183 | static inline int qt2_setdevice(struct usb_device *dev, u8 *data) | |
184 | { | |
185 | u16 x = ((u16) (data[1] << 8) | (u16) (data[0])); | |
186 | ||
187 | return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
188 | } | |
189 | ||
190 | ||
191 | static inline int qt2_getdevice(struct usb_device *dev, u8 *data) | |
192 | { | |
193 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
194 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
195 | data, 3, QT2_USB_TIMEOUT); | |
196 | } | |
197 | ||
198 | static inline int qt2_getregister(struct usb_device *dev, | |
199 | u8 uart, | |
200 | u8 reg, | |
201 | u8 *data) | |
202 | { | |
203 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
204 | QT_SET_GET_REGISTER, 0xc0, reg, | |
205 | uart, data, sizeof(*data), QT2_USB_TIMEOUT); | |
206 | ||
207 | } | |
208 | ||
209 | static inline int qt2_setregister(struct usb_device *dev, | |
210 | u8 uart, u8 reg, u16 data) | |
211 | { | |
212 | u16 value = (data << 8) | reg; | |
213 | ||
214 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
215 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
216 | NULL, 0, QT2_USB_TIMEOUT); | |
217 | } | |
218 | ||
219 | static inline int update_mctrl(struct qt2_port_private *port_priv, | |
220 | unsigned int set, unsigned int clear) | |
221 | { | |
222 | struct usb_serial_port *port = port_priv->port; | |
223 | struct usb_device *dev = port->serial->dev; | |
224 | unsigned urb_value; | |
225 | int status; | |
226 | ||
227 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
228 | dev_dbg(&port->dev, | |
229 | "update_mctrl - DTR|RTS not being set|cleared\n"); | |
230 | return 0; /* no change */ | |
231 | } | |
232 | ||
233 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
234 | urb_value = 0; | |
235 | if (set & TIOCM_DTR) | |
236 | urb_value |= UART_MCR_DTR; | |
237 | if (set & TIOCM_RTS) | |
238 | urb_value |= UART_MCR_RTS; | |
239 | ||
240 | status = qt2_setregister(dev, port_priv->device_port, UART_MCR, | |
241 | urb_value); | |
242 | if (status < 0) | |
243 | dev_err(&port->dev, | |
244 | "update_mctrl - Error from MODEM_CTRL urb: %i\n", | |
245 | status); | |
246 | return status; | |
247 | } | |
248 | ||
249 | static int qt2_calc_num_ports(struct usb_serial *serial) | |
250 | { | |
251 | struct qt2_device_detail d; | |
252 | int i; | |
253 | ||
254 | for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) { | |
255 | if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct)) | |
256 | return d.num_ports; | |
257 | } | |
258 | ||
259 | /* we didn't recognize the device */ | |
260 | dev_err(&serial->dev->dev, | |
261 | "don't know the number of ports, assuming 1\n"); | |
262 | ||
263 | return 1; | |
264 | } | |
265 | ||
266 | static void qt2_set_termios(struct tty_struct *tty, | |
267 | struct usb_serial_port *port, | |
268 | struct ktermios *old_termios) | |
269 | { | |
270 | struct usb_device *dev = port->serial->dev; | |
271 | struct qt2_port_private *port_priv; | |
adc8d746 | 272 | struct ktermios *termios = &tty->termios; |
f7a33e60 BP |
273 | u16 baud; |
274 | unsigned int cflag = termios->c_cflag; | |
275 | u16 new_lcr = 0; | |
276 | int status; | |
277 | ||
278 | port_priv = usb_get_serial_port_data(port); | |
279 | ||
280 | if (cflag & PARENB) { | |
281 | if (cflag & PARODD) | |
282 | new_lcr |= UART_LCR_PARITY; | |
283 | else | |
284 | new_lcr |= SERIAL_EVEN_PARITY; | |
285 | } | |
286 | ||
287 | switch (cflag & CSIZE) { | |
288 | case CS5: | |
289 | new_lcr |= UART_LCR_WLEN5; | |
290 | break; | |
291 | case CS6: | |
292 | new_lcr |= UART_LCR_WLEN6; | |
293 | break; | |
294 | case CS7: | |
295 | new_lcr |= UART_LCR_WLEN7; | |
296 | break; | |
297 | default: | |
298 | case CS8: | |
299 | new_lcr |= UART_LCR_WLEN8; | |
300 | break; | |
301 | } | |
302 | ||
303 | baud = tty_get_baud_rate(tty); | |
304 | if (!baud) | |
305 | baud = 9600; | |
306 | ||
307 | status = qt2_set_port_config(dev, port_priv->device_port, baud, | |
308 | new_lcr); | |
309 | if (status < 0) | |
310 | dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n", | |
311 | __func__, status); | |
312 | ||
313 | if (cflag & CRTSCTS) | |
314 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
315 | SERIAL_CRTSCTS, | |
316 | port_priv->device_port); | |
317 | else | |
318 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
319 | 0, port_priv->device_port); | |
320 | if (status < 0) | |
321 | dev_err(&port->dev, "%s - set HW flow control failed: %i\n", | |
322 | __func__, status); | |
323 | ||
324 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
325 | u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty))); | |
326 | ||
327 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
328 | x, port_priv->device_port); | |
329 | } else | |
330 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
331 | 0, port_priv->device_port); | |
332 | ||
333 | if (status < 0) | |
334 | dev_err(&port->dev, "%s - set SW flow control failed: %i\n", | |
335 | __func__, status); | |
336 | ||
337 | } | |
338 | ||
339 | static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) | |
340 | { | |
341 | struct usb_serial *serial; | |
f7a33e60 BP |
342 | struct qt2_port_private *port_priv; |
343 | u8 *data; | |
344 | u16 device_port; | |
345 | int status; | |
346 | unsigned long flags; | |
347 | ||
1143832e | 348 | device_port = port->port_number; |
f7a33e60 BP |
349 | |
350 | serial = port->serial; | |
351 | ||
352 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
353 | |
354 | /* set the port to RS232 mode */ | |
355 | status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR, | |
356 | QT2_QMCR_RS232, device_port); | |
357 | if (status < 0) { | |
358 | dev_err(&port->dev, | |
359 | "%s failed to set RS232 mode for port %i error %i\n", | |
360 | __func__, device_port, status); | |
361 | return status; | |
362 | } | |
363 | ||
364 | data = kzalloc(2, GFP_KERNEL); | |
365 | if (!data) | |
366 | return -ENOMEM; | |
367 | ||
368 | /* open the port */ | |
369 | status = usb_control_msg(serial->dev, | |
370 | usb_rcvctrlpipe(serial->dev, 0), | |
371 | QT_OPEN_CLOSE_CHANNEL, | |
372 | 0xc0, 0, | |
373 | device_port, data, 2, QT2_USB_TIMEOUT); | |
374 | ||
375 | if (status < 0) { | |
d9a38a87 | 376 | dev_err(&port->dev, "%s - open port failed %i\n", __func__, |
f7a33e60 BP |
377 | status); |
378 | kfree(data); | |
379 | return status; | |
380 | } | |
381 | ||
382 | spin_lock_irqsave(&port_priv->lock, flags); | |
383 | port_priv->shadowLSR = data[0]; | |
384 | port_priv->shadowMSR = data[1]; | |
385 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
386 | ||
387 | kfree(data); | |
388 | ||
389 | /* set to default speed and 8bit word size */ | |
390 | status = qt2_set_port_config(serial->dev, device_port, | |
391 | DEFAULT_BAUD_RATE, UART_LCR_WLEN8); | |
392 | if (status < 0) { | |
1143832e GKH |
393 | dev_err(&port->dev, "%s - initial setup failed (%i)\n", |
394 | __func__, device_port); | |
f7a33e60 BP |
395 | return status; |
396 | } | |
397 | ||
f7a33e60 BP |
398 | port_priv->device_port = (u8) device_port; |
399 | ||
400 | if (tty) | |
adc8d746 | 401 | qt2_set_termios(tty, port, &tty->termios); |
f7a33e60 BP |
402 | |
403 | return 0; | |
404 | ||
405 | } | |
406 | ||
407 | static void qt2_close(struct usb_serial_port *port) | |
408 | { | |
409 | struct usb_serial *serial; | |
f7a33e60 BP |
410 | struct qt2_port_private *port_priv; |
411 | unsigned long flags; | |
412 | int i; | |
413 | ||
414 | serial = port->serial; | |
f7a33e60 BP |
415 | port_priv = usb_get_serial_port_data(port); |
416 | ||
f7a33e60 | 417 | spin_lock_irqsave(&port_priv->urb_lock, flags); |
8e512ab0 | 418 | usb_kill_urb(port_priv->write_urb); |
f7a33e60 BP |
419 | port_priv->urb_in_use = false; |
420 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
421 | ||
422 | /* flush the port transmit buffer */ | |
423 | i = usb_control_msg(serial->dev, | |
424 | usb_rcvctrlpipe(serial->dev, 0), | |
425 | QT2_FLUSH_DEVICE, 0x40, 1, | |
426 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
427 | ||
428 | if (i < 0) | |
429 | dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n", | |
430 | __func__, i); | |
431 | ||
432 | /* flush the port receive buffer */ | |
433 | i = usb_control_msg(serial->dev, | |
434 | usb_rcvctrlpipe(serial->dev, 0), | |
435 | QT2_FLUSH_DEVICE, 0x40, 0, | |
436 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
437 | ||
438 | if (i < 0) | |
439 | dev_err(&port->dev, "%s - receive buffer flush failed: %i\n", | |
440 | __func__, i); | |
441 | ||
442 | /* close the port */ | |
443 | i = usb_control_msg(serial->dev, | |
444 | usb_sndctrlpipe(serial->dev, 0), | |
445 | QT_OPEN_CLOSE_CHANNEL, | |
446 | 0x40, 0, | |
447 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); | |
448 | ||
449 | if (i < 0) | |
450 | dev_err(&port->dev, "%s - close port failed %i\n", | |
451 | __func__, i); | |
f7a33e60 BP |
452 | } |
453 | ||
454 | static void qt2_disconnect(struct usb_serial *serial) | |
455 | { | |
456 | struct qt2_serial_private *serial_priv = usb_get_serial_data(serial); | |
f7a33e60 | 457 | |
8e512ab0 | 458 | usb_kill_urb(serial_priv->read_urb); |
f7a33e60 BP |
459 | } |
460 | ||
461 | static int get_serial_info(struct usb_serial_port *port, | |
462 | struct serial_struct __user *retinfo) | |
463 | { | |
464 | struct serial_struct tmp; | |
465 | ||
466 | if (!retinfo) | |
467 | return -EFAULT; | |
468 | ||
469 | memset(&tmp, 0, sizeof(tmp)); | |
e5b1e206 | 470 | tmp.line = port->minor; |
f7a33e60 BP |
471 | tmp.port = 0; |
472 | tmp.irq = 0; | |
473 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
474 | tmp.xmit_fifo_size = port->bulk_out_size; | |
475 | tmp.baud_base = 9600; | |
476 | tmp.close_delay = 5*HZ; | |
477 | tmp.closing_wait = 30*HZ; | |
478 | ||
479 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
480 | return -EFAULT; | |
481 | return 0; | |
482 | } | |
483 | ||
f7a33e60 BP |
484 | static int qt2_ioctl(struct tty_struct *tty, |
485 | unsigned int cmd, unsigned long arg) | |
486 | { | |
487 | struct usb_serial_port *port = tty->driver_data; | |
488 | ||
489 | switch (cmd) { | |
490 | case TIOCGSERIAL: | |
491 | return get_serial_info(port, | |
492 | (struct serial_struct __user *)arg); | |
f7a33e60 BP |
493 | default: |
494 | break; | |
495 | } | |
496 | ||
497 | return -ENOIOCTLCMD; | |
498 | } | |
499 | ||
500 | static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) | |
501 | { | |
502 | switch (*ch) { | |
503 | case QT2_LINE_STATUS: | |
504 | qt2_update_lsr(port, ch + 1); | |
505 | break; | |
506 | case QT2_MODEM_STATUS: | |
507 | qt2_update_msr(port, ch + 1); | |
508 | break; | |
509 | } | |
510 | } | |
511 | ||
512 | /* not needed, kept to document functionality */ | |
513 | static void qt2_process_xmit_empty(struct usb_serial_port *port, | |
514 | unsigned char *ch) | |
515 | { | |
516 | int bytes_written; | |
517 | ||
518 | bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4); | |
519 | } | |
520 | ||
521 | /* not needed, kept to document functionality */ | |
522 | static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch) | |
523 | { | |
524 | return; | |
525 | } | |
526 | ||
0e357899 | 527 | static void qt2_process_read_urb(struct urb *urb) |
f7a33e60 BP |
528 | { |
529 | struct usb_serial *serial; | |
530 | struct qt2_serial_private *serial_priv; | |
531 | struct usb_serial_port *port; | |
532 | struct qt2_port_private *port_priv; | |
f7a33e60 BP |
533 | bool escapeflag; |
534 | unsigned char *ch; | |
535 | int i; | |
536 | unsigned char newport; | |
537 | int len = urb->actual_length; | |
538 | ||
539 | if (!len) | |
540 | return; | |
541 | ||
542 | ch = urb->transfer_buffer; | |
f7a33e60 BP |
543 | serial = urb->context; |
544 | serial_priv = usb_get_serial_data(serial); | |
545 | port = serial->port[serial_priv->current_port]; | |
546 | port_priv = usb_get_serial_port_data(port); | |
547 | ||
f7a33e60 BP |
548 | for (i = 0; i < urb->actual_length; i++) { |
549 | ch = (unsigned char *)urb->transfer_buffer + i; | |
550 | if ((i <= (len - 3)) && | |
551 | (*ch == QT2_CONTROL_BYTE) && | |
552 | (*(ch + 1) == QT2_CONTROL_BYTE)) { | |
553 | escapeflag = false; | |
554 | switch (*(ch + 2)) { | |
555 | case QT2_LINE_STATUS: | |
556 | case QT2_MODEM_STATUS: | |
557 | if (i > (len - 4)) { | |
558 | dev_warn(&port->dev, | |
559 | "%s - status message too short\n", | |
560 | __func__); | |
561 | break; | |
562 | } | |
563 | qt2_process_status(port, ch + 2); | |
564 | i += 3; | |
565 | escapeflag = true; | |
566 | break; | |
567 | case QT2_XMIT_HOLD: | |
568 | if (i > (len - 5)) { | |
569 | dev_warn(&port->dev, | |
570 | "%s - xmit_empty message too short\n", | |
571 | __func__); | |
572 | break; | |
573 | } | |
574 | qt2_process_xmit_empty(port, ch + 3); | |
575 | i += 4; | |
576 | escapeflag = true; | |
577 | break; | |
578 | case QT2_CHANGE_PORT: | |
579 | if (i > (len - 4)) { | |
580 | dev_warn(&port->dev, | |
581 | "%s - change_port message too short\n", | |
582 | __func__); | |
583 | break; | |
584 | } | |
2be818a1 | 585 | tty_flip_buffer_push(&port->port); |
f7a33e60 BP |
586 | |
587 | newport = *(ch + 3); | |
588 | ||
589 | if (newport > serial->num_ports) { | |
590 | dev_err(&port->dev, | |
591 | "%s - port change to invalid port: %i\n", | |
592 | __func__, newport); | |
593 | break; | |
594 | } | |
595 | ||
596 | serial_priv->current_port = newport; | |
597 | port = serial->port[serial_priv->current_port]; | |
598 | port_priv = usb_get_serial_port_data(port); | |
f7a33e60 BP |
599 | i += 3; |
600 | escapeflag = true; | |
601 | break; | |
602 | case QT2_REC_FLUSH: | |
603 | case QT2_XMIT_FLUSH: | |
604 | qt2_process_flush(port, ch + 2); | |
605 | i += 2; | |
606 | escapeflag = true; | |
607 | break; | |
608 | case QT2_CONTROL_ESCAPE: | |
227434f8 | 609 | tty_buffer_request_room(&port->port, 2); |
05c7cd39 | 610 | tty_insert_flip_string(&port->port, ch, 2); |
f7a33e60 BP |
611 | i += 2; |
612 | escapeflag = true; | |
613 | break; | |
614 | default: | |
615 | dev_warn(&port->dev, | |
616 | "%s - unsupported command %i\n", | |
617 | __func__, *(ch + 2)); | |
618 | break; | |
619 | } | |
620 | if (escapeflag) | |
621 | continue; | |
622 | } | |
623 | ||
05c7cd39 JS |
624 | tty_buffer_request_room(&port->port, 1); |
625 | tty_insert_flip_string(&port->port, ch, 1); | |
f7a33e60 BP |
626 | } |
627 | ||
2be818a1 | 628 | tty_flip_buffer_push(&port->port); |
f7a33e60 BP |
629 | } |
630 | ||
631 | static void qt2_write_bulk_callback(struct urb *urb) | |
632 | { | |
633 | struct usb_serial_port *port; | |
634 | struct qt2_port_private *port_priv; | |
635 | ||
636 | port = urb->context; | |
637 | port_priv = usb_get_serial_port_data(port); | |
638 | ||
639 | spin_lock(&port_priv->urb_lock); | |
640 | ||
641 | port_priv->urb_in_use = false; | |
642 | usb_serial_port_softint(port); | |
643 | ||
644 | spin_unlock(&port_priv->urb_lock); | |
645 | ||
646 | } | |
647 | ||
648 | static void qt2_read_bulk_callback(struct urb *urb) | |
649 | { | |
650 | struct usb_serial *serial = urb->context; | |
651 | int status; | |
652 | ||
653 | if (urb->status) { | |
654 | dev_warn(&serial->dev->dev, | |
655 | "%s - non-zero urb status: %i\n", __func__, | |
656 | urb->status); | |
657 | return; | |
658 | } | |
659 | ||
660 | qt2_process_read_urb(urb); | |
661 | ||
662 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
663 | if (status != 0) | |
664 | dev_err(&serial->dev->dev, | |
665 | "%s - resubmit read urb failed: %i\n", | |
666 | __func__, status); | |
667 | } | |
668 | ||
669 | static int qt2_setup_urbs(struct usb_serial *serial) | |
670 | { | |
f7a33e60 BP |
671 | struct usb_serial_port *port0; |
672 | struct qt2_serial_private *serial_priv; | |
40d04738 | 673 | int status; |
f7a33e60 BP |
674 | |
675 | port0 = serial->port[0]; | |
676 | ||
677 | serial_priv = usb_get_serial_data(serial); | |
678 | serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
10c642d0 | 679 | if (!serial_priv->read_urb) |
f7a33e60 | 680 | return -ENOMEM; |
f7a33e60 BP |
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, | |
04480671 | 686 | QT2_READ_BUFFER_SIZE, |
f7a33e60 BP |
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); | |
10c642d0 | 716 | if (!serial_priv) |
f7a33e60 | 717 | return -ENOMEM; |
f7a33e60 | 718 | |
04480671 JH |
719 | serial_priv->read_buffer = kmalloc(QT2_READ_BUFFER_SIZE, GFP_KERNEL); |
720 | if (!serial_priv->read_buffer) { | |
721 | status = -ENOMEM; | |
722 | goto err_buf; | |
723 | } | |
724 | ||
f7a33e60 BP |
725 | usb_set_serial_data(serial, serial_priv); |
726 | ||
f7a33e60 BP |
727 | status = qt2_setup_urbs(serial); |
728 | if (status != 0) | |
729 | goto attach_failed; | |
730 | ||
731 | return 0; | |
732 | ||
733 | attach_failed: | |
04480671 JH |
734 | kfree(serial_priv->read_buffer); |
735 | err_buf: | |
f7a33e60 BP |
736 | kfree(serial_priv); |
737 | return status; | |
738 | } | |
739 | ||
40d04738 JH |
740 | static int qt2_port_probe(struct usb_serial_port *port) |
741 | { | |
742 | struct usb_serial *serial = port->serial; | |
743 | struct qt2_port_private *port_priv; | |
744 | u8 bEndpointAddress; | |
745 | ||
746 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); | |
747 | if (!port_priv) | |
748 | return -ENOMEM; | |
749 | ||
750 | spin_lock_init(&port_priv->lock); | |
751 | spin_lock_init(&port_priv->urb_lock); | |
40d04738 JH |
752 | port_priv->port = port; |
753 | ||
cbf30a91 JH |
754 | port_priv->write_buffer = kmalloc(QT2_WRITE_BUFFER_SIZE, GFP_KERNEL); |
755 | if (!port_priv->write_buffer) | |
756 | goto err_buf; | |
757 | ||
40d04738 | 758 | port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL); |
cbf30a91 JH |
759 | if (!port_priv->write_urb) |
760 | goto err_urb; | |
761 | ||
40d04738 JH |
762 | bEndpointAddress = serial->port[0]->bulk_out_endpointAddress; |
763 | usb_fill_bulk_urb(port_priv->write_urb, serial->dev, | |
764 | usb_sndbulkpipe(serial->dev, bEndpointAddress), | |
765 | port_priv->write_buffer, | |
cbf30a91 | 766 | QT2_WRITE_BUFFER_SIZE, |
40d04738 JH |
767 | qt2_write_bulk_callback, port); |
768 | ||
769 | usb_set_serial_port_data(port, port_priv); | |
770 | ||
771 | return 0; | |
cbf30a91 JH |
772 | err_urb: |
773 | kfree(port_priv->write_buffer); | |
774 | err_buf: | |
775 | kfree(port_priv); | |
776 | return -ENOMEM; | |
40d04738 JH |
777 | } |
778 | ||
779 | static int qt2_port_remove(struct usb_serial_port *port) | |
780 | { | |
781 | struct qt2_port_private *port_priv; | |
782 | ||
783 | port_priv = usb_get_serial_port_data(port); | |
784 | usb_free_urb(port_priv->write_urb); | |
cbf30a91 | 785 | kfree(port_priv->write_buffer); |
40d04738 JH |
786 | kfree(port_priv); |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
f7a33e60 BP |
791 | static int qt2_tiocmget(struct tty_struct *tty) |
792 | { | |
793 | struct usb_serial_port *port = tty->driver_data; | |
794 | struct usb_device *dev = port->serial->dev; | |
795 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
796 | u8 *d; | |
797 | int r; | |
798 | ||
799 | d = kzalloc(2, GFP_KERNEL); | |
800 | if (!d) | |
801 | return -ENOMEM; | |
802 | ||
803 | r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d); | |
804 | if (r < 0) | |
805 | goto mget_out; | |
806 | ||
807 | r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1); | |
808 | if (r < 0) | |
809 | goto mget_out; | |
810 | ||
811 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | | |
812 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
813 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
814 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
815 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
816 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
817 | ||
818 | mget_out: | |
819 | kfree(d); | |
820 | return r; | |
821 | } | |
822 | ||
823 | static int qt2_tiocmset(struct tty_struct *tty, | |
824 | unsigned int set, unsigned int clear) | |
825 | { | |
826 | struct qt2_port_private *port_priv; | |
827 | ||
828 | port_priv = usb_get_serial_port_data(tty->driver_data); | |
829 | return update_mctrl(port_priv, set, clear); | |
830 | } | |
831 | ||
832 | static void qt2_break_ctl(struct tty_struct *tty, int break_state) | |
833 | { | |
834 | struct usb_serial_port *port = tty->driver_data; | |
835 | struct qt2_port_private *port_priv; | |
836 | int status; | |
837 | u16 val; | |
838 | ||
839 | port_priv = usb_get_serial_port_data(port); | |
840 | ||
f7a33e60 BP |
841 | val = (break_state == -1) ? 1 : 0; |
842 | ||
843 | status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL, | |
844 | val, port_priv->device_port); | |
845 | if (status < 0) | |
846 | dev_warn(&port->dev, | |
847 | "%s - failed to send control message: %i\n", __func__, | |
848 | status); | |
849 | } | |
850 | ||
851 | ||
852 | ||
853 | static void qt2_dtr_rts(struct usb_serial_port *port, int on) | |
854 | { | |
855 | struct usb_device *dev = port->serial->dev; | |
856 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); | |
857 | ||
b2ca6990 JH |
858 | /* Disable flow control */ |
859 | if (!on) { | |
860 | if (qt2_setregister(dev, port_priv->device_port, | |
f7a33e60 BP |
861 | UART_MCR, 0) < 0) |
862 | dev_warn(&port->dev, "error from flowcontrol urb\n"); | |
f7a33e60 | 863 | } |
b2ca6990 JH |
864 | /* drop RTS and DTR */ |
865 | if (on) | |
866 | update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0); | |
867 | else | |
868 | update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS); | |
f7a33e60 BP |
869 | } |
870 | ||
871 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch) | |
872 | { | |
873 | struct qt2_port_private *port_priv; | |
874 | u8 newMSR = (u8) *ch; | |
875 | unsigned long flags; | |
876 | ||
877 | port_priv = usb_get_serial_port_data(port); | |
878 | ||
879 | spin_lock_irqsave(&port_priv->lock, flags); | |
880 | port_priv->shadowMSR = newMSR; | |
881 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
882 | ||
883 | if (newMSR & UART_MSR_ANY_DELTA) { | |
884 | /* update input line counters */ | |
885 | if (newMSR & UART_MSR_DCTS) | |
0a4142fb | 886 | port->icount.cts++; |
f7a33e60 | 887 | if (newMSR & UART_MSR_DDSR) |
0a4142fb | 888 | port->icount.dsr++; |
f7a33e60 | 889 | if (newMSR & UART_MSR_DDCD) |
0a4142fb | 890 | port->icount.dcd++; |
f7a33e60 | 891 | if (newMSR & UART_MSR_TERI) |
0a4142fb | 892 | port->icount.rng++; |
f7a33e60 | 893 | |
b5959704 | 894 | wake_up_interruptible(&port->port.delta_msr_wait); |
f7a33e60 BP |
895 | } |
896 | } | |
897 | ||
898 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch) | |
899 | { | |
900 | struct qt2_port_private *port_priv; | |
901 | struct async_icount *icount; | |
902 | unsigned long flags; | |
903 | u8 newLSR = (u8) *ch; | |
904 | ||
905 | port_priv = usb_get_serial_port_data(port); | |
906 | ||
907 | if (newLSR & UART_LSR_BI) | |
908 | newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI); | |
909 | ||
910 | spin_lock_irqsave(&port_priv->lock, flags); | |
911 | port_priv->shadowLSR = newLSR; | |
912 | spin_unlock_irqrestore(&port_priv->lock, flags); | |
913 | ||
0a4142fb | 914 | icount = &port->icount; |
f7a33e60 BP |
915 | |
916 | if (newLSR & UART_LSR_BRK_ERROR_BITS) { | |
917 | ||
918 | if (newLSR & UART_LSR_BI) | |
919 | icount->brk++; | |
920 | ||
921 | if (newLSR & UART_LSR_OE) | |
922 | icount->overrun++; | |
923 | ||
924 | if (newLSR & UART_LSR_PE) | |
925 | icount->parity++; | |
926 | ||
927 | if (newLSR & UART_LSR_FE) | |
928 | icount->frame++; | |
929 | } | |
930 | ||
931 | } | |
932 | ||
933 | static int qt2_write_room(struct tty_struct *tty) | |
934 | { | |
935 | struct usb_serial_port *port = tty->driver_data; | |
936 | struct qt2_port_private *port_priv; | |
937 | unsigned long flags = 0; | |
938 | int r; | |
939 | ||
940 | port_priv = usb_get_serial_port_data(port); | |
941 | ||
942 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
943 | ||
944 | if (port_priv->urb_in_use) | |
945 | r = 0; | |
946 | else | |
947 | r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE; | |
948 | ||
949 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
950 | ||
951 | return r; | |
952 | } | |
953 | ||
954 | static int qt2_write(struct tty_struct *tty, | |
955 | struct usb_serial_port *port, | |
956 | const unsigned char *buf, int count) | |
957 | { | |
958 | struct qt2_port_private *port_priv; | |
959 | struct urb *write_urb; | |
960 | unsigned char *data; | |
961 | unsigned long flags; | |
962 | int status; | |
963 | int bytes_out = 0; | |
964 | ||
965 | port_priv = usb_get_serial_port_data(port); | |
966 | ||
967 | if (port_priv->write_urb == NULL) { | |
968 | dev_err(&port->dev, "%s - no output urb\n", __func__); | |
969 | return 0; | |
970 | } | |
971 | write_urb = port_priv->write_urb; | |
972 | ||
973 | count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE); | |
974 | ||
975 | data = write_urb->transfer_buffer; | |
976 | spin_lock_irqsave(&port_priv->urb_lock, flags); | |
ce9d8562 | 977 | if (port_priv->urb_in_use) { |
788a661a | 978 | dev_err(&port->dev, "qt2_write - urb is in use\n"); |
f7a33e60 BP |
979 | goto write_out; |
980 | } | |
981 | ||
982 | *data++ = QT2_CONTROL_BYTE; | |
983 | *data++ = QT2_CONTROL_BYTE; | |
984 | *data++ = port_priv->device_port; | |
985 | put_unaligned_le16(count, data); | |
986 | data += 2; | |
987 | memcpy(data, buf, count); | |
988 | ||
989 | write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE; | |
990 | ||
991 | status = usb_submit_urb(write_urb, GFP_ATOMIC); | |
992 | if (status == 0) { | |
993 | port_priv->urb_in_use = true; | |
994 | bytes_out += count; | |
995 | } | |
996 | ||
997 | write_out: | |
998 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); | |
999 | return bytes_out; | |
1000 | } | |
1001 | ||
1002 | ||
1003 | static struct usb_serial_driver qt2_device = { | |
1004 | .driver = { | |
1005 | .owner = THIS_MODULE, | |
1006 | .name = "quatech-serial", | |
1007 | }, | |
1008 | .description = DRIVER_DESC, | |
1009 | .id_table = id_table, | |
1010 | .open = qt2_open, | |
1011 | .close = qt2_close, | |
1012 | .write = qt2_write, | |
1013 | .write_room = qt2_write_room, | |
1014 | .calc_num_ports = qt2_calc_num_ports, | |
1015 | .attach = qt2_attach, | |
1016 | .release = qt2_release, | |
1017 | .disconnect = qt2_disconnect, | |
40d04738 JH |
1018 | .port_probe = qt2_port_probe, |
1019 | .port_remove = qt2_port_remove, | |
f7a33e60 BP |
1020 | .dtr_rts = qt2_dtr_rts, |
1021 | .break_ctl = qt2_break_ctl, | |
1022 | .tiocmget = qt2_tiocmget, | |
1023 | .tiocmset = qt2_tiocmset, | |
b5959704 | 1024 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
0a4142fb | 1025 | .get_icount = usb_serial_generic_get_icount, |
f7a33e60 BP |
1026 | .ioctl = qt2_ioctl, |
1027 | .set_termios = qt2_set_termios, | |
1028 | }; | |
1029 | ||
1030 | static struct usb_serial_driver *const serial_drivers[] = { | |
1031 | &qt2_device, NULL | |
1032 | }; | |
1033 | ||
1034 | module_usb_serial_driver(serial_drivers, id_table); | |
1035 | ||
1036 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1037 | MODULE_LICENSE("GPL"); |