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staging: delete non-required instances of include <linux/init.h>
[deliverable/linux.git] / drivers / staging / serqt_usb2 / serqt_usb2.c
CommitLineData
d75662e1
BP		 1/*
2 * This code was developed for the Quatech USB line for linux, it used
3 * much of the code developed by Greg Kroah-Hartman for USB serial devices
4 *
5 */
6
7#include <linux/errno.h>
d75662e1
BP		 8#include <linux/slab.h>
9#include <linux/tty.h>
10#include <linux/tty_driver.h>
11#include <linux/tty_flip.h>
12#include <linux/module.h>
13#include <linux/serial.h>
14#include <linux/usb.h>
15#include <linux/usb/serial.h>
16#include <linux/uaccess.h>
17
d75662e1
BP		 18/* Version Information */
19#define DRIVER_VERSION "v2.14"
20#define DRIVER_AUTHOR "Tim Gobeli, Quatech, Inc"
21#define DRIVER_DESC "Quatech USB to Serial Driver"
22
23#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */
d75662e1
BP		 24#define QUATECH_SSU200 0xC030 /* SSU200 */
25#define QUATECH_DSU100 0xC040 /* DSU100 */
26#define QUATECH_DSU200 0xC050 /* DSU200 */
27#define QUATECH_QSU100 0xC060 /* QSU100 */
28#define QUATECH_QSU200 0xC070 /* QSU200 */
29#define QUATECH_ESU100A 0xC080 /* ESU100A */
30#define QUATECH_ESU100B 0xC081 /* ESU100B */
31#define QUATECH_ESU200A 0xC0A0 /* ESU200A */
32#define QUATECH_ESU200B 0xC0A1 /* ESU200B */
33#define QUATECH_HSU100A 0xC090 /* HSU100A */
34#define QUATECH_HSU100B 0xC091 /* HSU100B */
35#define QUATECH_HSU100C 0xC092 /* HSU100C */
36#define QUATECH_HSU100D 0xC093 /* HSU100D */
37#define QUATECH_HSU200A 0xC0B0 /* HSU200A */
38#define QUATECH_HSU200B 0xC0B1 /* HSU200B */
39#define QUATECH_HSU200C 0xC0B2 /* HSU200C */
40#define QUATECH_HSU200D 0xC0B3 /* HSU200D */
d75662e1
BP		 41
42#define QT_SET_GET_DEVICE 0xc2
43#define QT_OPEN_CLOSE_CHANNEL 0xca
44#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
45#define QT_SET_ATF 0xcd
46#define QT_GET_SET_REGISTER 0xc0
47#define QT_GET_SET_UART 0xc1
48#define QT_HW_FLOW_CONTROL_MASK 0xc5
49#define QT_SW_FLOW_CONTROL_MASK 0xc6
50#define QT_SW_FLOW_CONTROL_DISABLE 0xc7
51#define QT_BREAK_CONTROL 0xc8
52
53#define USBD_TRANSFER_DIRECTION_IN 0xc0
54#define USBD_TRANSFER_DIRECTION_OUT 0x40
55
56#define MAX_BAUD_RATE 460800
57#define MAX_BAUD_REMAINDER 4608
58
59#define DIV_LATCH_LS 0x00
60#define XMT_HOLD_REGISTER 0x00
61#define XVR_BUFFER_REGISTER 0x00
62#define DIV_LATCH_MS 0x01
63#define FIFO_CONTROL_REGISTER 0x02
64#define LINE_CONTROL_REGISTER 0x03
65#define MODEM_CONTROL_REGISTER 0x04
66#define LINE_STATUS_REGISTER 0x05
67#define MODEM_STATUS_REGISTER 0x06
68
69#define SERIAL_MCR_DTR 0x01
70#define SERIAL_MCR_RTS 0x02
71#define SERIAL_MCR_LOOP 0x10
72
73#define SERIAL_MSR_CTS 0x10
74#define SERIAL_MSR_CD 0x80
75#define SERIAL_MSR_RI 0x40
76#define SERIAL_MSR_DSR 0x20
77#define SERIAL_MSR_MASK 0xf0
78
79#define SERIAL_8_DATA 0x03
80#define SERIAL_7_DATA 0x02
81#define SERIAL_6_DATA 0x01
82#define SERIAL_5_DATA 0x00
83
84#define SERIAL_ODD_PARITY 0X08
85#define SERIAL_EVEN_PARITY 0X18
86#define SERIAL_TWO_STOPB 0x04
87#define SERIAL_ONE_STOPB 0x00
88
89#define DEFAULT_DIVISOR 0x30 /* gives 9600 baud rate */
90#define DEFAULT_LCR SERIAL_8_DATA /* 8, none , 1 */
91
92#define FULLPWRBIT 0x00000080
93#define NEXT_BOARD_POWER_BIT 0x00000004
94
95#define SERIAL_LSR_OE 0x02
96#define SERIAL_LSR_PE 0x04
97#define SERIAL_LSR_FE 0x08
98#define SERIAL_LSR_BI 0x10
99
100#define SERIAL_MSR_CTS 0x10
101#define SERIAL_MSR_CD 0x80
102#define SERIAL_MSR_RI 0x40
103#define SERIAL_MSR_DSR 0x20
104#define SERIAL_MSR_MASK 0xf0
105
106#define PREFUFF_LEVEL_CONSERVATIVE 128
107#define ATC_DISABLED 0x0
108
109#define RR_BITS 0x03 /* for clearing clock bits */
110#define DUPMODE_BITS 0xc0
111#define CLKS_X4 0x02
112
113#define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */
114#define ALL_LOOPBACK 0x01
115#define MODEM_CTRL 0x40
116#define RS232_MODE 0x00
117
68e24113 118static const struct usb_device_id id_table[] = {
d75662e1
BP		 119 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU200)},
120 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100)},
121 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU200)},
122 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100)},
123 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU200)},
124 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100A)},
125 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100B)},
126 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200A)},
127 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200B)},
128 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100A)},
129 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100B)},
130 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100C)},
131 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100D)},
132 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200A)},
133 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200B)},
134 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200C)},
135 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200D)},
d75662e1
BP		 136 {} /* Terminating entry */
137};
68e24113 138MODULE_DEVICE_TABLE(usb, id_table);
d75662e1
BP		 139
140struct qt_get_device_data {
141 __u8 porta;
142 __u8 portb;
143 __u8 portc;
144};
145
146struct qt_open_channel_data {
147 __u8 line_status;
148 __u8 modem_status;
149};
150
151struct quatech_port {
152 int port_num; /* number of the port */
153 struct urb *write_urb; /* write URB for this port */
154 struct urb *read_urb; /* read URB for this port */
155 struct urb *int_urb;
156
d68edc28
BB		 157 __u8 shadow_lcr; /* last LCR value received */
158 __u8 shadow_mcr; /* last MCR value received */
159 __u8 shadow_msr; /* last MSR value received */
160 __u8 shadow_lsr; /* last LSR value received */
d75662e1
BP		 161 char open_ports;
162
163 /* Used for TIOCMIWAIT */
164 wait_queue_head_t msr_wait;
165 char prev_status, diff_status;
166
167 wait_queue_head_t wait;
168
169 struct async_icount icount;
170
171 struct usb_serial_port *port; /* owner of this object */
d68edc28 172 struct qt_get_device_data device_data;
fa2d8bbb 173 struct mutex lock;
d75662e1 174 bool read_urb_busy;
d68edc28
BB		 175 int rx_holding;
176 int read_bulk_stopped;
177 char close_pending;
d75662e1
BP		 178};
179
d75662e1
BP		 180static int port_paranoia_check(struct usb_serial_port *port,
181 const char *function)
182{
183 if (!port) {
e8656b02 184 pr_debug("%s - port == NULL", function);
d75662e1
BP		 185 return -1;
186 }
187 if (!port->serial) {
e8656b02 188 pr_debug("%s - port->serial == NULL\n", function);
d75662e1
BP		 189 return -1;
190 }
191
192 return 0;
193}
194
195static int serial_paranoia_check(struct usb_serial *serial,
196 const char *function)
197{
198 if (!serial) {
e8656b02 199 pr_debug("%s - serial == NULL\n", function);
d75662e1
BP		 200 return -1;
201 }
202
203 if (!serial->type) {
e8656b02 204 pr_debug("%s - serial->type == NULL!", function);
d75662e1
BP		 205 return -1;
206 }
207
208 return 0;
209}
210
211static inline struct quatech_port *qt_get_port_private(struct usb_serial_port
212 *port)
213{
214 return (struct quatech_port *)usb_get_serial_port_data(port);
215}
216
217static inline void qt_set_port_private(struct usb_serial_port *port,
218 struct quatech_port *data)
219{
220 usb_set_serial_port_data(port, (void *)data);
221}
222
223static struct usb_serial *get_usb_serial(struct usb_serial_port *port,
224 const char *function)
225{
226 /* if no port was specified, or it fails a paranoia check */
227 if (!port ||
228 port_paranoia_check(port, function) ||
229 serial_paranoia_check(port->serial, function)) {
230 /*
231 * then say that we dont have a valid usb_serial thing,
232 * which will end up genrating -ENODEV return values
233 */
234 return NULL;
235 }
236
237 return port->serial;
238}
239
d68edc28 240static void process_line_status(struct quatech_port *qt_port,
d75662e1
BP		 241 unsigned char line_status)
242{
243
d68edc28 244 qt_port->shadow_lsr =
d75662e1
BP		 245 line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE |
246 SERIAL_LSR_BI);
d75662e1
BP		 247}
248
d68edc28 249static void process_modem_status(struct quatech_port *qt_port,
d75662e1
BP		 250 unsigned char modem_status)
251{
252
d68edc28 253 qt_port->shadow_msr = modem_status;
d75662e1 254 wake_up_interruptible(&qt_port->wait);
d75662e1
BP		 255}
256
d68edc28 257static void process_rx_char(struct usb_serial_port *port, unsigned char data)
d75662e1 258{
d75662e1 259 struct urb *urb = port->read_urb;
94362fd7 260 if (urb->actual_length)
92a19f9c 261 tty_insert_flip_char(&port->port, data, TTY_NORMAL);
d75662e1
BP		 262}
263
264static void qt_write_bulk_callback(struct urb *urb)
265{
d75662e1
BP		 266 int status;
267 struct quatech_port *quatech_port;
268
269 status = urb->status;
270
271 if (status) {
01295448
YT		 272 dev_dbg(&urb->dev->dev,
273 "nonzero write bulk status received:%d\n", status);
d75662e1
BP		 274 return;
275 }
276
277 quatech_port = urb->context;
278
6aad04f2 279 tty_port_tty_wakeup(&quatech_port->port->port);
d75662e1
BP		 280}
281
282static void qt_interrupt_callback(struct urb *urb)
283{
284 /* FIXME */
285}
286
2e124b4a 287static void qt_status_change_check(struct urb *urb,
bbbd527b
YT		 288 struct quatech_port *qt_port,
289 struct usb_serial_port *port)
290{
291 int flag, i;
292 unsigned char *data = urb->transfer_buffer;
d68edc28 293 unsigned int rx_count = urb->actual_length;
bbbd527b 294
d68edc28 295 for (i = 0; i < rx_count; ++i) {
bbbd527b 296 /* Look ahead code here */
d68edc28 297 if ((i <= (rx_count - 3)) && (data[i] == 0x1b)
bbbd527b
YT		 298 && (data[i + 1] == 0x1b)) {
299 flag = 0;
300 switch (data[i + 2]) {
301 case 0x00:
d68edc28 302 if (i > (rx_count - 4)) {
9d36976f
YT		 303 dev_dbg(&port->dev,
304 "Illegal escape seuences in received data\n");
305 break;
306 }
307
d68edc28 308 process_line_status(qt_port, data[i + 3]);
9d36976f
YT		 309
310 i += 3;
311 flag = 1;
312 break;
313
bbbd527b 314 case 0x01:
d68edc28 315 if (i > (rx_count - 4)) {
9d36976f
YT		 316 dev_dbg(&port->dev,
317 "Illegal escape seuences in received data\n");
318 break;
319 }
320
d68edc28 321 process_modem_status(qt_port, data[i + 3]);
9d36976f
YT		 322
323 i += 3;
324 flag = 1;
bbbd527b
YT		 325 break;
326
327 case 0xff:
328 dev_dbg(&port->dev, "No status sequence.\n");
329
d68edc28
BB		 330 process_rx_char(port, data[i]);
331 process_rx_char(port, data[i + 1]);
bbbd527b
YT		 332
333 i += 2;
334 break;
335 }
336 if (flag == 1)
337 continue;
338 }
339
92a19f9c
JS		 340 if (urb->actual_length)
341 tty_insert_flip_char(&port->port, data[i], TTY_NORMAL);
bbbd527b
YT		 342
343 }
2e124b4a 344 tty_flip_buffer_push(&port->port);
bbbd527b
YT		 345}
346
d75662e1
BP		 347static void qt_read_bulk_callback(struct urb *urb)
348{
349
350 struct usb_serial_port *port = urb->context;
351 struct usb_serial *serial = get_usb_serial(port, __func__);
352 struct quatech_port *qt_port = qt_get_port_private(port);
bbbd527b 353 int result;
d75662e1
BP		 354
355 if (urb->status) {
d68edc28 356 qt_port->read_bulk_stopped = 1;
bbbd527b
YT		 357 dev_dbg(&urb->dev->dev,
358 "%s - nonzero write bulk status received: %d\n",
e8656b02 359 __func__, urb->status);
d75662e1
BP		 360 return;
361 }
362
01295448 363 dev_dbg(&port->dev,
d68edc28 364 "%s - port->rx_holding = %d\n", __func__, qt_port->rx_holding);
d75662e1
BP		 365
366 if (port_paranoia_check(port, __func__) != 0) {
d68edc28 367 qt_port->read_bulk_stopped = 1;
6732c8bb 368 return;
d75662e1
BP		 369 }
370
e8656b02 371 if (!serial)
6732c8bb 372 return;
e8656b02 373
d68edc28 374 if (qt_port->close_pending == 1) {
d75662e1 375 /* Were closing , stop reading */
01295448 376 dev_dbg(&port->dev,
d68edc28
BB		 377 "%s - (qt_port->close_pending == 1\n", __func__);
378 qt_port->read_bulk_stopped = 1;
6732c8bb 379 return;
d75662e1
BP		 380 }
381
382 /*
d68edc28 383 * rx_holding is asserted by throttle, if we assert it, we're not
d75662e1
BP		 384 * receiving any more characters and let the box handle the flow
385 * control
386 */
d68edc28
BB		 387 if (qt_port->rx_holding == 1) {
388 qt_port->read_bulk_stopped = 1;
6732c8bb 389 return;
d75662e1
BP		 390 }
391
392 if (urb->status) {
d68edc28 393 qt_port->read_bulk_stopped = 1;
d75662e1 394
bbbd527b
YT		 395 dev_dbg(&port->dev,
396 "%s - nonzero read bulk status received: %d\n",
e8656b02 397 __func__, urb->status);
6732c8bb 398 return;
d75662e1
BP		 399 }
400
bbbd527b 401 if (urb->actual_length)
2e124b4a 402 qt_status_change_check(urb, qt_port, port);
d75662e1
BP		 403
404 /* Continue trying to always read */
405 usb_fill_bulk_urb(port->read_urb, serial->dev,
406 usb_rcvbulkpipe(serial->dev,
407 port->bulk_in_endpointAddress),
408 port->read_urb->transfer_buffer,
409 port->read_urb->transfer_buffer_length,
410 qt_read_bulk_callback, port);
411 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
412 if (result)
bbbd527b
YT		 413 dev_dbg(&port->dev,
414 "%s - failed resubmitting read urb, error %d",
e8656b02 415 __func__, result);
d75662e1 416 else {
bbbd527b 417 if (urb->actual_length) {
2e124b4a 418 tty_flip_buffer_push(&port->port);
6732c8bb 419 tty_schedule_flip(&port->port);
d75662e1
BP		 420 }
421 }
422
423 schedule_work(&port->work);
424}
425
426/*
427 * qt_get_device
428 * Issue a GET_DEVICE vendor-specific request on the default control pipe If
429 * successful, fills in the qt_get_device_data structure pointed to by
430 * device_data, otherwise return a negative error number of the problem.
431 */
432
433static int qt_get_device(struct usb_serial *serial,
434 struct qt_get_device_data *device_data)
435{
436 int result;
437 unsigned char *transfer_buffer;
438
439 transfer_buffer =
440 kmalloc(sizeof(struct qt_get_device_data), GFP_KERNEL);
441 if (!transfer_buffer)
442 return -ENOMEM;
443
444 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
445 QT_SET_GET_DEVICE, 0xc0, 0, 0,
446 transfer_buffer,
447 sizeof(struct qt_get_device_data), 300);
448 if (result > 0)
449 memcpy(device_data, transfer_buffer,
450 sizeof(struct qt_get_device_data));
451 kfree(transfer_buffer);
452
453 return result;
454}
455
456/****************************************************************************
d68edc28 457 * box_set_prebuffer_level
d75662e1
BP		 458 TELLS BOX WHEN TO ASSERT FLOW CONTROL
459 ****************************************************************************/
d68edc28 460static int box_set_prebuffer_level(struct usb_serial *serial)
d75662e1
BP		 461{
462 int result;
463 __u16 buffer_length;
464
465 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
466 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
467 QT_GET_SET_PREBUF_TRIG_LVL, 0x40,
468 buffer_length, 0, NULL, 0, 300);
469 return result;
470}
471
472/****************************************************************************
d68edc28 473 * box_set_atc
d75662e1
BP		 474 TELLS BOX WHEN TO ASSERT automatic transmitter control
475 ****************************************************************************/
d68edc28 476static int box_set_atc(struct usb_serial *serial, __u16 n_mode)
d75662e1
BP		 477{
478 int result;
479 __u16 buffer_length;
480
481 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
482
483 result =
484 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
d68edc28 485 QT_SET_ATF, 0x40, n_mode, 0, NULL, 0, 300);
d75662e1
BP		 486
487 return result;
488}
489
490/**
491 * qt_set_device
492 * Issue a SET_DEVICE vendor-specific request on the default control pipe If
493 * successful returns the number of bytes written, otherwise it returns a
494 * negative error number of the problem.
495 */
496static int qt_set_device(struct usb_serial *serial,
497 struct qt_get_device_data *device_data)
498{
499 int result;
500 __u16 length;
d68edc28 501 __u16 port_settings;
d75662e1 502
d68edc28
BB		 503 port_settings = ((__u16) (device_data->portb));
504 port_settings = (port_settings << 8);
505 port_settings += ((__u16) (device_data->porta));
d75662e1
BP		 506
507 length = sizeof(struct qt_get_device_data);
d75662e1
BP		 508
509 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
d68edc28 510 QT_SET_GET_DEVICE, 0x40, port_settings,
d75662e1
BP		 511 0, NULL, 0, 300);
512 return result;
513}
514
ef2af122 515static int qt_open_channel(struct usb_serial *serial, __u16 uart_num,
d68edc28 516 struct qt_open_channel_data *pdevice_data)
d75662e1
BP		 517{
518 int result;
519
520 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
521 QT_OPEN_CLOSE_CHANNEL,
ef2af122 522 USBD_TRANSFER_DIRECTION_IN, 1, uart_num,
d68edc28 523 pdevice_data,
d75662e1
BP		 524 sizeof(struct qt_open_channel_data), 300);
525
526 return result;
527
528}
529
ef2af122 530static int qt_close_channel(struct usb_serial *serial, __u16 uart_num)
d75662e1
BP		 531{
532 int result;
533
534 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
535 QT_OPEN_CLOSE_CHANNEL,
ef2af122 536 USBD_TRANSFER_DIRECTION_OUT, 0, uart_num,
d75662e1
BP		 537 NULL, 0, 300);
538
539 return result;
540
541}
542
543/****************************************************************************
d68edc28 544* box_get_register
d75662e1 545* issuse a GET_REGISTER vendor-spcific request on the default control pipe
d68edc28 546* If successful, fills in the p_value with the register value asked for
d75662e1 547****************************************************************************/
ef2af122 548static int box_get_register(struct usb_serial *serial, unsigned short uart_num,
d68edc28 549 unsigned short register_num, __u8 *p_value)
d75662e1
BP		 550{
551 int result;
552 __u16 current_length;
553
554 current_length = sizeof(struct qt_get_device_data);
555
556 result =
557 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
d68edc28 558 QT_GET_SET_REGISTER, 0xC0, register_num,
ef2af122 559 uart_num, (void *)p_value, sizeof(*p_value), 300);
d75662e1
BP		 560
561 return result;
562}
563
564/****************************************************************************
d68edc28 565* box_set_register
d75662e1 566* issuse a GET_REGISTER vendor-spcific request on the default control pipe
d68edc28 567* If successful, fills in the p_value with the register value asked for
d75662e1 568****************************************************************************/
ef2af122 569static int box_set_register(struct usb_serial *serial, unsigned short uart_num,
d68edc28 570 unsigned short register_num, unsigned short value)
d75662e1
BP		 571{
572 int result;
d68edc28 573 unsigned short reg_and_byte;
d75662e1 574
d68edc28
BB		 575 reg_and_byte = value;
576 reg_and_byte = reg_and_byte << 8;
577 reg_and_byte = reg_and_byte + register_num;
d75662e1
BP		 578
579/*
580 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
d68edc28 581 QT_GET_SET_REGISTER, 0xC0, register_num,
ef2af122 582 uart_num, NULL, 0, 300);
d75662e1
BP		 583*/
584
585 result =
586 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
ef2af122 587 QT_GET_SET_REGISTER, 0x40, reg_and_byte, uart_num,
d75662e1
BP		 588 NULL, 0, 300);
589
590 return result;
591}
592
593/*
594 * qt_setuart
1351acce 595 * issues a SET_UART vendor-specific request on the default control pipe
d75662e1
BP		 596 * If successful sets baud rate divisor and LCR value
597 */
ef2af122 598static int qt_setuart(struct usb_serial *serial, unsigned short uart_num,
d68edc28 599 unsigned short default_divisor, unsigned char default_lcr)
d75662e1
BP		 600{
601 int result;
d68edc28 602 unsigned short uart_num_and_lcr;
d75662e1 603
ef2af122 604 uart_num_and_lcr = (default_lcr << 8) + uart_num;
d75662e1
BP		 605
606 result =
607 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
608 QT_GET_SET_UART, 0x40, default_divisor,
d68edc28 609 uart_num_and_lcr, NULL, 0, 300);
d75662e1
BP		 610
611 return result;
612}
613
d68edc28
BB		 614static int box_set_hw_flow_ctrl(struct usb_serial *serial, unsigned int index,
615 int b_set)
d75662e1
BP		 616{
617 __u8 mcr = 0;
d68edc28 618 __u8 msr = 0, mout_value = 0;
d75662e1
BP		 619 unsigned int status;
620
d68edc28 621 if (b_set == 1) {
d75662e1
BP		 622 /* flow control, box will clear RTS line to prevent remote */
623 mcr = SERIAL_MCR_RTS;
624 } /* device from xmitting more chars */
625 else {
626 /* no flow control to remote device */
627 mcr = 0;
628
629 }
d68edc28 630 mout_value = mcr << 8;
d75662e1 631
d68edc28 632 if (b_set == 1) {
d75662e1
BP		 633 /* flow control, box will inhibit xmit data if CTS line is
634 * asserted */
635 msr = SERIAL_MSR_CTS;
636 } else {
637 /* Box will not inhimbe xmit data due to CTS line */
638 msr = 0;
639 }
d68edc28 640 mout_value |= msr;
d75662e1
BP		 641
642 status =
643 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
d68edc28 644 QT_HW_FLOW_CONTROL_MASK, 0x40, mout_value,
d75662e1
BP		 645 index, NULL, 0, 300);
646 return status;
647
648}
649
d68edc28 650static int box_set_sw_flow_ctrl(struct usb_serial *serial, __u16 index,
d75662e1
BP		 651 unsigned char stop_char, unsigned char start_char)
652{
d68edc28 653 __u16 n_sw_flow_out;
d75662e1
BP		 654 int result;
655
d68edc28
BB		 656 n_sw_flow_out = start_char << 8;
657 n_sw_flow_out = (unsigned short)stop_char;
d75662e1
BP		 658
659 result =
660 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
d68edc28 661 QT_SW_FLOW_CONTROL_MASK, 0x40, n_sw_flow_out,
d75662e1
BP		 662 index, NULL, 0, 300);
663 return result;
664
665}
666
d68edc28 667static int box_disable_sw_flow_ctrl(struct usb_serial *serial, __u16 index)
d75662e1
BP		 668{
669 int result;
670
671 result =
672 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
673 QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index,
674 NULL, 0, 300);
675 return result;
676
677}
678
679static int qt_startup(struct usb_serial *serial)
680{
e8656b02 681 struct device *dev = &serial->dev->dev;
d75662e1
BP		 682 struct usb_serial_port *port;
683 struct quatech_port *qt_port;
d68edc28 684 struct qt_get_device_data device_data;
d75662e1
BP		 685 int i;
686 int status;
687
d75662e1
BP		 688 /* Now setup per port private data */
689 for (i = 0; i < serial->num_ports; i++) {
690 port = serial->port[i];
691 qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL);
692 if (!qt_port) {
1695eb36 693 for (--i; i >= 0; i--) {
de8f8bd6
ON		 694 port = serial->port[i];
695 kfree(usb_get_serial_port_data(port));
696 usb_set_serial_port_data(port, NULL);
697 }
d75662e1
BP		 698 return -ENOMEM;
699 }
fa2d8bbb 700 mutex_init(&qt_port->lock);
d75662e1
BP		 701
702 usb_set_serial_port_data(port, qt_port);
703
704 }
705
d68edc28 706 status = qt_get_device(serial, &device_data);
e8656b02 707 if (status < 0)
d75662e1 708 goto startup_error;
d75662e1 709
d68edc28 710 dev_dbg(dev, "device_data.portb = 0x%x\n", device_data.portb);
d75662e1 711
d68edc28
BB		 712 device_data.portb &= ~FULLPWRBIT;
713 dev_dbg(dev, "Changing device_data.portb to 0x%x\n", device_data.portb);
d75662e1 714
d68edc28 715 status = qt_set_device(serial, &device_data);
d75662e1 716 if (status < 0) {
e8656b02 717 dev_dbg(dev, "qt_set_device failed\n");
d75662e1
BP		 718 goto startup_error;
719 }
720
d68edc28 721 status = qt_get_device(serial, &device_data);
d75662e1 722 if (status < 0) {
e8656b02 723 dev_dbg(dev, "qt_get_device failed\n");
d75662e1
BP		 724 goto startup_error;
725 }
726
727 switch (serial->dev->descriptor.idProduct) {
d75662e1
BP		 728 case QUATECH_DSU100:
729 case QUATECH_QSU100:
730 case QUATECH_ESU100A:
731 case QUATECH_ESU100B:
732 case QUATECH_HSU100A:
733 case QUATECH_HSU100B:
734 case QUATECH_HSU100C:
735 case QUATECH_HSU100D:
d68edc28
BB		 736 device_data.porta &= ~(RR_BITS | DUPMODE_BITS);
737 device_data.porta |= CLKS_X4;
738 device_data.portb &= ~(LOOPMODE_BITS);
739 device_data.portb |= RS232_MODE;
d75662e1
BP		 740 break;
741
742 case QUATECH_SSU200:
743 case QUATECH_DSU200:
744 case QUATECH_QSU200:
745 case QUATECH_ESU200A:
746 case QUATECH_ESU200B:
747 case QUATECH_HSU200A:
748 case QUATECH_HSU200B:
749 case QUATECH_HSU200C:
750 case QUATECH_HSU200D:
d68edc28
BB		 751 device_data.porta &= ~(RR_BITS | DUPMODE_BITS);
752 device_data.porta |= CLKS_X4;
753 device_data.portb &= ~(LOOPMODE_BITS);
754 device_data.portb |= ALL_LOOPBACK;
d75662e1
BP		 755 break;
756 default:
d68edc28
BB		 757 device_data.porta &= ~(RR_BITS | DUPMODE_BITS);
758 device_data.porta |= CLKS_X4;
759 device_data.portb &= ~(LOOPMODE_BITS);
760 device_data.portb |= RS232_MODE;
d75662e1
BP		 761 break;
762
763 }
764
d68edc28 765 status = box_set_prebuffer_level(serial); /* sets to default value */
d75662e1 766 if (status < 0) {
d68edc28 767 dev_dbg(dev, "box_set_prebuffer_level failed\n");
d75662e1
BP		 768 goto startup_error;
769 }
770
d68edc28 771 status = box_set_atc(serial, ATC_DISABLED);
d75662e1 772 if (status < 0) {
d68edc28 773 dev_dbg(dev, "box_set_atc failed\n");
d75662e1
BP		 774 goto startup_error;
775 }
776
d68edc28 777 dev_dbg(dev, "device_data.portb = 0x%x\n", device_data.portb);
d75662e1 778
d68edc28
BB		 779 device_data.portb |= NEXT_BOARD_POWER_BIT;
780 dev_dbg(dev, "Changing device_data.portb to 0x%x\n", device_data.portb);
d75662e1 781
d68edc28 782 status = qt_set_device(serial, &device_data);
d75662e1 783 if (status < 0) {
e8656b02 784 dev_dbg(dev, "qt_set_device failed\n");
d75662e1
BP		 785 goto startup_error;
786 }
787
d75662e1
BP		 788 return 0;
789
790startup_error:
791 for (i = 0; i < serial->num_ports; i++) {
792 port = serial->port[i];
793 qt_port = qt_get_port_private(port);
794 kfree(qt_port);
795 usb_set_serial_port_data(port, NULL);
796 }
797
d75662e1
BP		 798 return -EIO;
799}
800
801static void qt_release(struct usb_serial *serial)
802{
803 struct usb_serial_port *port;
804 struct quatech_port *qt_port;
805 int i;
806
d75662e1
BP		 807 for (i = 0; i < serial->num_ports; i++) {
808 port = serial->port[i];
809 if (!port)
810 continue;
811
812 qt_port = usb_get_serial_port_data(port);
813 kfree(qt_port);
814 usb_set_serial_port_data(port, NULL);
815 }
816
817}
818
04e9d11b
YT		 819static void qt_submit_urb_from_open(struct usb_serial *serial,
820 struct usb_serial_port *port)
821{
822 int result;
823 struct usb_serial_port *port0 = serial->port[0];
824
825 /* set up interrupt urb */
826 usb_fill_int_urb(port0->interrupt_in_urb,
827 serial->dev,
828 usb_rcvintpipe(serial->dev,
829 port0->interrupt_in_endpointAddress),
830 port0->interrupt_in_buffer,
831 port0->interrupt_in_urb->transfer_buffer_length,
832 qt_interrupt_callback, serial,
833 port0->interrupt_in_urb->interval);
834
835 result = usb_submit_urb(port0->interrupt_in_urb,
836 GFP_KERNEL);
837 if (result) {
838 dev_err(&port->dev,
839 "%s - Error %d submitting interrupt urb\n",
840 __func__, result);
841 }
842}
843
35e2bed5 844static int qt_open(struct tty_struct *tty,
2386b331 845 struct usb_serial_port *port)
d75662e1
BP		 846{
847 struct usb_serial *serial;
848 struct quatech_port *quatech_port;
849 struct quatech_port *port0;
d68edc28 850 struct qt_open_channel_data channel_data;
d75662e1
BP		 851
852 int result;
853
854 if (port_paranoia_check(port, __func__))
855 return -ENODEV;
856
d75662e1
BP		 857 serial = port->serial;
858
859 if (serial_paranoia_check(serial, __func__))
860 return -ENODEV;
861
862 quatech_port = qt_get_port_private(port);
863 port0 = qt_get_port_private(serial->port[0]);
864
865 if (quatech_port == NULL || port0 == NULL)
866 return -ENODEV;
867
868 usb_clear_halt(serial->dev, port->write_urb->pipe);
869 usb_clear_halt(serial->dev, port->read_urb->pipe);
870 port0->open_ports++;
871
d68edc28 872 result = qt_get_device(serial, &port0->device_data);
d75662e1
BP		 873
874 /* Port specific setups */
ce49b628 875 result = qt_open_channel(serial, port->port_number, &channel_data);
d75662e1 876 if (result < 0) {
e8656b02 877 dev_dbg(&port->dev, "qt_open_channel failed\n");
d75662e1
BP		 878 return result;
879 }
e8656b02 880 dev_dbg(&port->dev, "qt_open_channel completed.\n");
d75662e1
BP		 881
882/* FIXME: are these needed? Does it even do anything useful? */
d68edc28 883 quatech_port->shadow_lsr = channel_data.line_status &
d75662e1
BP		 884 (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI);
885
d68edc28 886 quatech_port->shadow_msr = channel_data.modem_status &
d75662e1
BP		 887 (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
888
889 /* Set Baud rate to default and turn off (default)flow control here */
1143832e 890 result = qt_setuart(serial, port->port_number, DEFAULT_DIVISOR, DEFAULT_LCR);
d75662e1 891 if (result < 0) {
e8656b02 892 dev_dbg(&port->dev, "qt_setuart failed\n");
d75662e1
BP		 893 return result;
894 }
e8656b02 895 dev_dbg(&port->dev, "qt_setuart completed.\n");
d75662e1
BP		 896
897 /*
bbc9a991 898 * Put this here to make it responsive to stty and defaults set by
d75662e1
BP		 899 * the tty layer
900 */
d75662e1
BP		 901
902 /* Check to see if we've set up our endpoint info yet */
903 if (port0->open_ports == 1) {
04e9d11b
YT		 904 if (serial->port[0]->interrupt_in_buffer == NULL)
905 qt_submit_urb_from_open(serial, port);
d75662e1
BP		 906 }
907
e5b1e206 908 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
01295448
YT		 909 dev_dbg(&port->dev,
910 "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
911 dev_dbg(&port->dev,
912 "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
913 dev_dbg(&port->dev, "Interrupt endpoint is %d\n",
914 port->interrupt_in_endpointAddress);
915 dev_dbg(&port->dev, "port's number in the device is %d\n",
916 quatech_port->port_num);
d75662e1
BP		 917 quatech_port->read_urb = port->read_urb;
918
919 /* set up our bulk in urb */
920
921 usb_fill_bulk_urb(quatech_port->read_urb,
922 serial->dev,
923 usb_rcvbulkpipe(serial->dev,
924 port->bulk_in_endpointAddress),
925 port->bulk_in_buffer,
926 quatech_port->read_urb->transfer_buffer_length,
927 qt_read_bulk_callback, quatech_port);
928
01295448
YT		 929 dev_dbg(&port->dev, "qt_open: bulkin endpoint is %d\n",
930 port->bulk_in_endpointAddress);
d75662e1
BP		 931 quatech_port->read_urb_busy = true;
932 result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL);
933 if (result) {
934 dev_err(&port->dev,
935 "%s - Error %d submitting control urb\n",
936 __func__, result);
937 quatech_port->read_urb_busy = false;
938 }
939
940 /* initialize our wait queues */
941 init_waitqueue_head(&quatech_port->wait);
942 init_waitqueue_head(&quatech_port->msr_wait);
943
944 /* initialize our icount structure */
945 memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount));
946
947 return 0;
948
949}
950
951static int qt_chars_in_buffer(struct tty_struct *tty)
952{
953 struct usb_serial_port *port = tty->driver_data;
954 struct usb_serial *serial;
955 int chars = 0;
956
957 serial = get_usb_serial(port, __func__);
958
d75662e1
BP		 959 if (serial->num_bulk_out) {
960 if (port->write_urb->status == -EINPROGRESS)
961 chars = port->write_urb->transfer_buffer_length;
962 }
963
d75662e1
BP		 964 return chars;
965}
966
967static void qt_block_until_empty(struct tty_struct *tty,
968 struct quatech_port *qt_port)
969{
970 int timeout = HZ / 10;
971 int wait = 30;
972 int count;
973
974 while (1) {
975
976 count = qt_chars_in_buffer(tty);
977
978 if (count <= 0)
979 return;
980
981 interruptible_sleep_on_timeout(&qt_port->wait, timeout);
982
983 wait--;
984 if (wait == 0) {
e8656b02 985 dev_dbg(&qt_port->port->dev, "%s - TIMEOUT", __func__);
d75662e1
BP		 986 return;
987 } else {
988 wait = 30;
989 }
990 }
991}
992
f3a75688 993static void qt_close(struct usb_serial_port *port)
d75662e1
BP		 994{
995 struct usb_serial *serial = port->serial;
996 struct quatech_port *qt_port;
997 struct quatech_port *port0;
d9dea3c1 998 struct tty_struct *tty;
d75662e1
BP		 999 int status;
1000 unsigned int index;
1001 status = 0;
1002
d9dea3c1 1003 tty = tty_port_tty_get(&port->port);
e5b1e206 1004 index = port->port_number;
d75662e1
BP		 1005
1006 qt_port = qt_get_port_private(port);
1007 port0 = qt_get_port_private(serial->port[0]);
1008
1009 /* shutdown any bulk reads that might be going on */
1010 if (serial->num_bulk_out)
1011 usb_unlink_urb(port->write_urb);
1012 if (serial->num_bulk_in)
1013 usb_unlink_urb(port->read_urb);
1014
1015 /* wait up to for transmitter to empty */
1016 if (serial->dev)
1017 qt_block_until_empty(tty, qt_port);
f3a75688 1018 tty_kref_put(tty);
d75662e1
BP		 1019
1020 /* Close uart channel */
1021 status = qt_close_channel(serial, index);
1022 if (status < 0)
1143832e 1023 dev_dbg(&port->dev, "%s - qt_close_channel failed.\n", __func__);
d75662e1
BP		 1024
1025 port0->open_ports--;
1026
1143832e 1027 dev_dbg(&port->dev, "qt_num_open_ports in close%d\n", port0->open_ports);
d75662e1
BP		 1028
1029 if (port0->open_ports == 0) {
1030 if (serial->port[0]->interrupt_in_urb) {
01295448 1031 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
d75662e1
BP		 1032 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1033 }
1034
1035 }
1036
1037 if (qt_port->write_urb) {
1038 /* if this urb had a transfer buffer already (old tx) free it */
ef055f10 1039 kfree(qt_port->write_urb->transfer_buffer);
d75662e1
BP		 1040 usb_free_urb(qt_port->write_urb);
1041 }
1042
1043}
1044
1045static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
1046 const unsigned char *buf, int count)
1047{
1048 int result;
1049 struct usb_serial *serial = get_usb_serial(port, __func__);
1050
1051 if (serial == NULL)
1052 return -ENODEV;
1053
d75662e1 1054 if (count == 0) {
01295448
YT		 1055 dev_dbg(&port->dev,
1056 "%s - write request of 0 bytes\n", __func__);
d75662e1
BP		 1057 return 0;
1058 }
1059
1060 /* only do something if we have a bulk out endpoint */
1061 if (serial->num_bulk_out) {
1062 if (port->write_urb->status == -EINPROGRESS) {
e8656b02 1063 dev_dbg(&port->dev, "%s - already writing\n", __func__);
d75662e1
BP		 1064 return 0;
1065 }
1066
1067 count =
1068 (count > port->bulk_out_size) ? port->bulk_out_size : count;
1069 memcpy(port->write_urb->transfer_buffer, buf, count);
1070
1071 /* set up our urb */
1072
1073 usb_fill_bulk_urb(port->write_urb, serial->dev,
1074 usb_sndbulkpipe(serial->dev,
1075 port->
1076 bulk_out_endpointAddress),
1077 port->write_urb->transfer_buffer, count,
1078 qt_write_bulk_callback, port);
1079
1080 /* send the data out the bulk port */
1081 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1082 if (result)
01295448
YT		 1083 dev_dbg(&port->dev,
1084 "%s - failed submitting write urb, error %d\n",
e8656b02 1085 __func__, result);
d75662e1
BP		 1086 else
1087 result = count;
1088
1089 return result;
1090 }
1091
1092 /* no bulk out, so return 0 bytes written */
1093 return 0;
1094}
1095
1096static int qt_write_room(struct tty_struct *tty)
1097{
1098 struct usb_serial_port *port = tty->driver_data;
1099 struct usb_serial *serial;
1100 struct quatech_port *qt_port;
d75662e1
BP		 1101
1102 int retval = -EINVAL;
1103
e8656b02 1104 if (port_paranoia_check(port, __func__))
d75662e1 1105 return -1;
d75662e1
BP		 1106
1107 serial = get_usb_serial(port, __func__);
1108
1109 if (!serial)
1110 return -ENODEV;
1111
1112 qt_port = qt_get_port_private(port);
1113
fa2d8bbb 1114 mutex_lock(&qt_port->lock);
d75662e1 1115
d75662e1
BP		 1116 if (serial->num_bulk_out) {
1117 if (port->write_urb->status != -EINPROGRESS)
1118 retval = port->bulk_out_size;
1119 }
1120
fa2d8bbb 1121 mutex_unlock(&qt_port->lock);
d75662e1
BP		 1122 return retval;
1123
1124}
1125
00a0d0d6 1126static int qt_ioctl(struct tty_struct *tty,
d75662e1
BP		 1127 unsigned int cmd, unsigned long arg)
1128{
1129 struct usb_serial_port *port = tty->driver_data;
1130 struct quatech_port *qt_port = qt_get_port_private(port);
d75662e1
BP		 1131 unsigned int index;
1132
e8656b02 1133 dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
d75662e1 1134
e5b1e206 1135 index = port->port_number;
d75662e1
BP		 1136
1137 if (cmd == TIOCMIWAIT) {
1138 while (qt_port != NULL) {
1139 interruptible_sleep_on(&qt_port->msr_wait);
1140 if (signal_pending(current))
1141 return -ERESTARTSYS;
1142 else {
1143 char diff = qt_port->diff_status;
1144
1145 if (diff == 0)
1146 return -EIO; /* no change => error */
1147
1148 /* Consume all events */
1149 qt_port->diff_status = 0;
1150
1151 if (((arg & TIOCM_RNG)
1152 && (diff & SERIAL_MSR_RI))
1153 || ((arg & TIOCM_DSR)
1154 && (diff & SERIAL_MSR_DSR))
1155 || ((arg & TIOCM_CD)
1156 && (diff & SERIAL_MSR_CD))
1157 || ((arg & TIOCM_CTS)
1158 && (diff & SERIAL_MSR_CTS))) {
1159 return 0;
1160 }
1161 }
1162 }
1163 return 0;
1164 }
1165
1143832e 1166 dev_dbg(&port->dev, "%s -No ioctl for that one.\n", __func__);
d75662e1
BP		 1167 return -ENOIOCTLCMD;
1168}
1169
1170static void qt_set_termios(struct tty_struct *tty,
1171 struct usb_serial_port *port,
1172 struct ktermios *old_termios)
1173{
9b12daf7 1174 struct ktermios *termios = &tty->termios;
d68edc28 1175 unsigned char new_lcr = 0;
d75662e1
BP		 1176 unsigned int cflag = termios->c_cflag;
1177 unsigned int index;
1178 int baud, divisor, remainder;
1179 int status;
1180
e5b1e206 1181 index = port->port_number;
d75662e1 1182
9b12daf7 1183 switch (cflag & CSIZE) {
d75662e1 1184 case CS5:
d68edc28 1185 new_lcr |= SERIAL_5_DATA;
d75662e1
BP		 1186 break;
1187 case CS6:
d68edc28 1188 new_lcr |= SERIAL_6_DATA;
d75662e1
BP		 1189 break;
1190 case CS7:
d68edc28 1191 new_lcr |= SERIAL_7_DATA;
d75662e1
BP		 1192 break;
1193 default:
9b12daf7
AC		 1194 termios->c_cflag &= ~CSIZE;
1195 termios->c_cflag |= CS8;
d75662e1 1196 case CS8:
d68edc28 1197 new_lcr |= SERIAL_8_DATA;
d75662e1
BP		 1198 break;
1199 }
1200
1201 /* Parity stuff */
1202 if (cflag & PARENB) {
1203 if (cflag & PARODD)
d68edc28 1204 new_lcr |= SERIAL_ODD_PARITY;
d75662e1 1205 else
d68edc28 1206 new_lcr |= SERIAL_EVEN_PARITY;
d75662e1
BP		 1207 }
1208 if (cflag & CSTOPB)
d68edc28 1209 new_lcr |= SERIAL_TWO_STOPB;
d75662e1 1210 else
d68edc28 1211 new_lcr |= SERIAL_ONE_STOPB;
d75662e1 1212
e8656b02 1213 dev_dbg(&port->dev, "%s - 4\n", __func__);
d75662e1
BP		 1214
1215 /* Thats the LCR stuff, go ahead and set it */
1216 baud = tty_get_baud_rate(tty);
1217 if (!baud)
1218 /* pick a default, any default... */
1219 baud = 9600;
1220
e8656b02 1221 dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
d75662e1
BP		 1222
1223 divisor = MAX_BAUD_RATE / baud;
1224 remainder = MAX_BAUD_RATE % baud;
1225 /* Round to nearest divisor */
1226 if (((remainder * 2) >= baud) && (baud != 110))
1227 divisor++;
1228
1229 /*
1230 * Set Baud rate to default and turn off (default)flow control here
1231 */
1232 status =
d68edc28 1233 qt_setuart(port->serial, index, (unsigned short)divisor, new_lcr);
d75662e1 1234 if (status < 0) {
e8656b02 1235 dev_dbg(&port->dev, "qt_setuart failed\n");
d75662e1
BP		 1236 return;
1237 }
1238
1239 /* Now determine flow control */
1240 if (cflag & CRTSCTS) {
1143832e 1241 dev_dbg(&port->dev, "%s - Enabling HW flow control\n", __func__);
d75662e1
BP		 1242
1243 /* Enable RTS/CTS flow control */
d68edc28 1244 status = box_set_hw_flow_ctrl(port->serial, index, 1);
d75662e1
BP		 1245
1246 if (status < 0) {
d68edc28 1247 dev_dbg(&port->dev, "box_set_hw_flow_ctrl failed\n");
d75662e1
BP		 1248 return;
1249 }
1250 } else {
1251 /* Disable RTS/CTS flow control */
01295448 1252 dev_dbg(&port->dev,
1143832e 1253 "%s - disabling HW flow control\n", __func__);
d75662e1 1254
d68edc28 1255 status = box_set_hw_flow_ctrl(port->serial, index, 0);
d75662e1 1256 if (status < 0) {
d68edc28 1257 dev_dbg(&port->dev, "box_set_hw_flow_ctrl failed\n");
d75662e1
BP		 1258 return;
1259 }
1260
1261 }
1262
1263 /* if we are implementing XON/XOFF, set the start and stop character in
1264 * the device */
1265 if (I_IXOFF(tty) || I_IXON(tty)) {
1266 unsigned char stop_char = STOP_CHAR(tty);
1267 unsigned char start_char = START_CHAR(tty);
1268 status =
d68edc28 1269 box_set_sw_flow_ctrl(port->serial, index, stop_char,
d75662e1
BP		 1270 start_char);
1271 if (status < 0)
01295448 1272 dev_dbg(&port->dev,
d68edc28 1273 "box_set_sw_flow_ctrl (enabled) failed\n");
d75662e1
BP		 1274
1275 } else {
1276 /* disable SW flow control */
d68edc28 1277 status = box_disable_sw_flow_ctrl(port->serial, index);
d75662e1 1278 if (status < 0)
01295448 1279 dev_dbg(&port->dev,
d68edc28 1280 "box_set_sw_flow_ctrl (diabling) failed\n");
d75662e1
BP		 1281
1282 }
9b12daf7 1283 termios->c_cflag &= ~CMSPAR;
01295448
YT		 1284 /* FIXME:
1285 Error cases should be returning the actual bits changed only
1286 */
d75662e1
BP		 1287}
1288
1289static void qt_break(struct tty_struct *tty, int break_state)
1290{
1291 struct usb_serial_port *port = tty->driver_data;
1292 struct usb_serial *serial = get_usb_serial(port, __func__);
1293 struct quatech_port *qt_port;
1294 u16 index, onoff;
1295 unsigned int result;
d75662e1 1296
e5b1e206 1297 index = port->port_number;
d75662e1
BP		 1298
1299 qt_port = qt_get_port_private(port);
1300
1301 if (break_state == -1)
1302 onoff = 1;
1303 else
1304 onoff = 0;
1305
fa2d8bbb 1306 mutex_lock(&qt_port->lock);
d75662e1 1307
d75662e1
BP		 1308 result =
1309 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1310 QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300);
1311
fa2d8bbb 1312 mutex_unlock(&qt_port->lock);
d75662e1
BP		 1313}
1314
1315static inline int qt_real_tiocmget(struct tty_struct *tty,
1316 struct usb_serial_port *port,
60b33c13 1317 struct usb_serial *serial)
d75662e1
BP		 1318{
1319
1320 u8 mcr;
1321 u8 msr;
1322 unsigned int result = 0;
1323 int status;
1324 unsigned int index;
1325
e5b1e206 1326 index = port->port_number;
d75662e1 1327 status =
d68edc28 1328 box_get_register(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
d75662e1
BP		 1329 if (status >= 0) {
1330 status =
d68edc28 1331 box_get_register(port->serial, index,
d75662e1
BP		 1332 MODEM_STATUS_REGISTER, &msr);
1333
1334 }
1335
1336 if (status >= 0) {
1337 result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
1338 /* DTR IS SET */
1339 | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
1340 /* RTS IS SET */
1341 | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
1342 /* CTS is set */
1343 | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
1344 /* Carrier detect is set */
1345 | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
1346 /* Ring indicator set */
1347 | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
1348 /* DSR is set */
1349 return result;
1350
1351 } else
1352 return -ESPIPE;
1353}
1354
1355static inline int qt_real_tiocmset(struct tty_struct *tty,
1356 struct usb_serial_port *port,
d75662e1
BP		 1357 struct usb_serial *serial,
1358 unsigned int value)
1359{
1360
1361 u8 mcr;
1362 int status;
1363 unsigned int index;
1364
e5b1e206 1365 index = port->port_number;
d75662e1 1366 status =
d68edc28 1367 box_get_register(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
d75662e1
BP		 1368 if (status < 0)
1369 return -ESPIPE;
1370
1371 /*
1351acce 1372 * Turn off the RTS and DTR and loopback and then only turn on what was
d75662e1
BP		 1373 * asked for
1374 */
1375 mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
1376 if (value & TIOCM_RTS)
1377 mcr |= SERIAL_MCR_RTS;
1378 if (value & TIOCM_DTR)
1379 mcr |= SERIAL_MCR_DTR;
1380 if (value & TIOCM_LOOP)
1381 mcr |= SERIAL_MCR_LOOP;
1382
1383 status =
d68edc28 1384 box_set_register(port->serial, index, MODEM_CONTROL_REGISTER, mcr);
d75662e1
BP		 1385 if (status < 0)
1386 return -ESPIPE;
1387 else
1388 return 0;
1389}
1390
60b33c13 1391static int qt_tiocmget(struct tty_struct *tty)
d75662e1
BP		 1392{
1393 struct usb_serial_port *port = tty->driver_data;
1394 struct usb_serial *serial = get_usb_serial(port, __func__);
1395 struct quatech_port *qt_port = qt_get_port_private(port);
7b11eb3e 1396 int retval;
d75662e1 1397
d75662e1
BP		 1398 if (!serial)
1399 return -ENODEV;
1400
fa2d8bbb 1401 mutex_lock(&qt_port->lock);
60b33c13 1402 retval = qt_real_tiocmget(tty, port, serial);
fa2d8bbb 1403 mutex_unlock(&qt_port->lock);
d75662e1
BP		 1404 return retval;
1405}
1406
20b9d177 1407static int qt_tiocmset(struct tty_struct *tty,
d75662e1
BP		 1408 unsigned int set, unsigned int clear)
1409{
1410
1411 struct usb_serial_port *port = tty->driver_data;
1412 struct usb_serial *serial = get_usb_serial(port, __func__);
1413 struct quatech_port *qt_port = qt_get_port_private(port);
7b11eb3e 1414 int retval;
d75662e1 1415
d75662e1
BP		 1416 if (!serial)
1417 return -ENODEV;
1418
fa2d8bbb 1419 mutex_lock(&qt_port->lock);
20b9d177 1420 retval = qt_real_tiocmset(tty, port, serial, set);
fa2d8bbb 1421 mutex_unlock(&qt_port->lock);
d75662e1
BP		 1422 return retval;
1423}
1424
1425static void qt_throttle(struct tty_struct *tty)
1426{
1427 struct usb_serial_port *port = tty->driver_data;
1428 struct usb_serial *serial = get_usb_serial(port, __func__);
1429 struct quatech_port *qt_port;
d75662e1 1430
d75662e1
BP		 1431 if (!serial)
1432 return;
1433
1434 qt_port = qt_get_port_private(port);
1435
fa2d8bbb 1436 mutex_lock(&qt_port->lock);
d75662e1
BP		 1437
1438 /* pass on to the driver specific version of this function */
d68edc28 1439 qt_port->rx_holding = 1;
d75662e1 1440
fa2d8bbb 1441 mutex_unlock(&qt_port->lock);
d75662e1
BP		 1442}
1443
7028035d
YT		 1444static void qt_submit_urb_from_unthrottle(struct usb_serial_port *port,
1445 struct usb_serial *serial)
1446{
1447 int result;
1448
1449 /* Start reading from the device */
1450 usb_fill_bulk_urb(port->read_urb, serial->dev,
1451 usb_rcvbulkpipe(serial->dev,
1452 port->bulk_in_endpointAddress),
1453 port->read_urb->transfer_buffer,
1454 port->read_urb->transfer_buffer_length,
1455 qt_read_bulk_callback, port);
1456
1457 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1458
1459 if (result)
1460 dev_err(&port->dev,
1461 "%s - failed restarting read urb, error %d\n",
1462 __func__, result);
1463}
1464
d75662e1
BP		 1465static void qt_unthrottle(struct tty_struct *tty)
1466{
1467 struct usb_serial_port *port = tty->driver_data;
1468 struct usb_serial *serial = get_usb_serial(port, __func__);
1469 struct quatech_port *qt_port;
d75662e1
BP		 1470
1471 if (!serial)
1472 return;
1473
1474 qt_port = qt_get_port_private(port);
1475
fa2d8bbb 1476 mutex_lock(&qt_port->lock);
d75662e1 1477
d68edc28
BB		 1478 if (qt_port->rx_holding == 1) {
1479 dev_dbg(&port->dev, "%s -qt_port->rx_holding == 1\n", __func__);
d75662e1 1480
d68edc28
BB		 1481 qt_port->rx_holding = 0;
1482 dev_dbg(&port->dev, "%s - qt_port->rx_holding = 0\n", __func__);
d75662e1
BP		 1483
1484 /* if we have a bulk endpoint, start it up */
d68edc28 1485 if ((serial->num_bulk_in) && (qt_port->read_bulk_stopped == 1))
7028035d 1486 qt_submit_urb_from_unthrottle(port, serial);
d75662e1 1487 }
fa2d8bbb 1488 mutex_unlock(&qt_port->lock);
d75662e1
BP		 1489}
1490
1491static int qt_calc_num_ports(struct usb_serial *serial)
1492{
1493 int num_ports;
1494
d75662e1
BP		 1495 num_ports =
1496 (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2;
1497
1498 return num_ports;
1499}
1500
1501static struct usb_serial_driver quatech_device = {
1502 .driver = {
1503 .owner = THIS_MODULE,
1504 .name = "serqt",
1505 },
1506 .description = DRIVER_DESC,
68e24113 1507 .id_table = id_table,
d75662e1
BP		 1508 .num_ports = 8,
1509 .open = qt_open,
1510 .close = qt_close,
1511 .write = qt_write,
1512 .write_room = qt_write_room,
1513 .chars_in_buffer = qt_chars_in_buffer,
1514 .throttle = qt_throttle,
1515 .unthrottle = qt_unthrottle,
1516 .calc_num_ports = qt_calc_num_ports,
1517 .ioctl = qt_ioctl,
1518 .set_termios = qt_set_termios,
1519 .break_ctl = qt_break,
1520 .tiocmget = qt_tiocmget,
1521 .tiocmset = qt_tiocmset,
1522 .attach = qt_startup,
1523 .release = qt_release,
1524};
1525
69276a33
AS		 1526static struct usb_serial_driver * const serial_drivers[] = {
1527 &quatech_device, NULL
1528};
1529
68e24113 1530module_usb_serial_driver(serial_drivers, id_table);
d75662e1
BP		 1531
1532MODULE_AUTHOR(DRIVER_AUTHOR);
1533MODULE_DESCRIPTION(DRIVER_DESC);
1534MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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