Loading...
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * USB Keyspan PDA / Xircom / Entrega Converter driver
4 *
5 * Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 1999, 2000 Brian Warner <warner@lothar.com>
7 * Copyright (C) 2000 Al Borchers <borchers@steinerpoint.com>
8 * Copyright (C) 2020 Johan Hovold <johan@kernel.org>
9 *
10 * See Documentation/usb/usb-serial.rst for more information on using this
11 * driver
12 */
13
14#include <linux/kernel.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
17#include <linux/tty.h>
18#include <linux/tty_driver.h>
19#include <linux/tty_flip.h>
20#include <linux/module.h>
21#include <linux/spinlock.h>
22#include <linux/workqueue.h>
23#include <linux/uaccess.h>
24#include <linux/usb.h>
25#include <linux/usb/serial.h>
26#include <linux/usb/ezusb.h>
27
28#define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>, Johan Hovold <johan@kernel.org>"
29#define DRIVER_DESC "USB Keyspan PDA Converter driver"
30
31#define KEYSPAN_TX_THRESHOLD 128
32
33struct keyspan_pda_private {
34 int tx_room;
35 struct work_struct unthrottle_work;
36 struct usb_serial *serial;
37 struct usb_serial_port *port;
38};
39
40static int keyspan_pda_write_start(struct usb_serial_port *port);
41
42#define KEYSPAN_VENDOR_ID 0x06cd
43#define KEYSPAN_PDA_FAKE_ID 0x0103
44#define KEYSPAN_PDA_ID 0x0104 /* no clue */
45
46/* For Xircom PGSDB9 and older Entrega version of the same device */
47#define XIRCOM_VENDOR_ID 0x085a
48#define XIRCOM_FAKE_ID 0x8027
49#define XIRCOM_FAKE_ID_2 0x8025 /* "PGMFHUB" serial */
50#define ENTREGA_VENDOR_ID 0x1645
51#define ENTREGA_FAKE_ID 0x8093
52
53static const struct usb_device_id id_table_combined[] = {
54 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
55 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
56 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
57 { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
58 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
59 { } /* Terminating entry */
60};
61MODULE_DEVICE_TABLE(usb, id_table_combined);
62
63static const struct usb_device_id id_table_std[] = {
64 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
65 { } /* Terminating entry */
66};
67
68static const struct usb_device_id id_table_fake[] = {
69 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
70 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
71 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
72 { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
73 { } /* Terminating entry */
74};
75
76static int keyspan_pda_get_write_room(struct keyspan_pda_private *priv)
77{
78 struct usb_serial_port *port = priv->port;
79 struct usb_serial *serial = port->serial;
80 u8 room;
81 int rc;
82
83 rc = usb_control_msg_recv(serial->dev,
84 0,
85 6, /* write_room */
86 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_IN,
87 0, /* value: 0 means "remaining room" */
88 0, /* index */
89 &room,
90 1,
91 2000,
92 GFP_KERNEL);
93 if (rc) {
94 dev_dbg(&port->dev, "roomquery failed: %d\n", rc);
95 return rc;
96 }
97
98 dev_dbg(&port->dev, "roomquery says %d\n", room);
99
100 return room;
101}
102
103static void keyspan_pda_request_unthrottle(struct work_struct *work)
104{
105 struct keyspan_pda_private *priv =
106 container_of(work, struct keyspan_pda_private, unthrottle_work);
107 struct usb_serial_port *port = priv->port;
108 struct usb_serial *serial = port->serial;
109 unsigned long flags;
110 int result;
111
112 dev_dbg(&port->dev, "%s\n", __func__);
113
114 /*
115 * Ask the device to tell us when the tx buffer becomes
116 * sufficiently empty.
117 */
118 result = usb_control_msg(serial->dev,
119 usb_sndctrlpipe(serial->dev, 0),
120 7, /* request_unthrottle */
121 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
122 | USB_DIR_OUT,
123 KEYSPAN_TX_THRESHOLD,
124 0, /* index */
125 NULL,
126 0,
127 2000);
128 if (result < 0)
129 dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n",
130 __func__, result);
131 /*
132 * Need to check available space after requesting notification in case
133 * buffer is already empty so that no notification is sent.
134 */
135 result = keyspan_pda_get_write_room(priv);
136 if (result > KEYSPAN_TX_THRESHOLD) {
137 spin_lock_irqsave(&port->lock, flags);
138 priv->tx_room = max(priv->tx_room, result);
139 spin_unlock_irqrestore(&port->lock, flags);
140
141 usb_serial_port_softint(port);
142 }
143}
144
145static void keyspan_pda_rx_interrupt(struct urb *urb)
146{
147 struct usb_serial_port *port = urb->context;
148 unsigned char *data = urb->transfer_buffer;
149 unsigned int len = urb->actual_length;
150 int retval;
151 int status = urb->status;
152 struct keyspan_pda_private *priv;
153 unsigned long flags;
154
155 priv = usb_get_serial_port_data(port);
156
157 switch (status) {
158 case 0:
159 /* success */
160 break;
161 case -ECONNRESET:
162 case -ENOENT:
163 case -ESHUTDOWN:
164 /* this urb is terminated, clean up */
165 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
166 return;
167 default:
168 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
169 goto exit;
170 }
171
172 if (len < 1) {
173 dev_warn(&port->dev, "short message received\n");
174 goto exit;
175 }
176
177 /* see if the message is data or a status interrupt */
178 switch (data[0]) {
179 case 0:
180 /* rest of message is rx data */
181 if (len < 2)
182 break;
183 tty_insert_flip_string(&port->port, data + 1, len - 1);
184 tty_flip_buffer_push(&port->port);
185 break;
186 case 1:
187 /* status interrupt */
188 if (len < 2) {
189 dev_warn(&port->dev, "short interrupt message received\n");
190 break;
191 }
192 dev_dbg(&port->dev, "rx int, d1=%d\n", data[1]);
193 switch (data[1]) {
194 case 1: /* modemline change */
195 break;
196 case 2: /* tx unthrottle interrupt */
197 spin_lock_irqsave(&port->lock, flags);
198 priv->tx_room = max(priv->tx_room, KEYSPAN_TX_THRESHOLD);
199 spin_unlock_irqrestore(&port->lock, flags);
200
201 keyspan_pda_write_start(port);
202
203 usb_serial_port_softint(port);
204 break;
205 default:
206 break;
207 }
208 break;
209 default:
210 break;
211 }
212
213exit:
214 retval = usb_submit_urb(urb, GFP_ATOMIC);
215 if (retval)
216 dev_err(&port->dev,
217 "%s - usb_submit_urb failed with result %d\n",
218 __func__, retval);
219}
220
221static void keyspan_pda_rx_throttle(struct tty_struct *tty)
222{
223 struct usb_serial_port *port = tty->driver_data;
224
225 /*
226 * Stop receiving characters. We just turn off the URB request, and
227 * let chars pile up in the device. If we're doing hardware
228 * flowcontrol, the device will signal the other end when its buffer
229 * fills up. If we're doing XON/XOFF, this would be a good time to
230 * send an XOFF, although it might make sense to foist that off upon
231 * the device too.
232 */
233 usb_kill_urb(port->interrupt_in_urb);
234}
235
236static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
237{
238 struct usb_serial_port *port = tty->driver_data;
239
240 /* just restart the receive interrupt URB */
241 if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
242 dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n");
243}
244
245static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
246{
247 int rc;
248 int bindex;
249
250 switch (baud) {
251 case 110:
252 bindex = 0;
253 break;
254 case 300:
255 bindex = 1;
256 break;
257 case 1200:
258 bindex = 2;
259 break;
260 case 2400:
261 bindex = 3;
262 break;
263 case 4800:
264 bindex = 4;
265 break;
266 case 9600:
267 bindex = 5;
268 break;
269 case 19200:
270 bindex = 6;
271 break;
272 case 38400:
273 bindex = 7;
274 break;
275 case 57600:
276 bindex = 8;
277 break;
278 case 115200:
279 bindex = 9;
280 break;
281 default:
282 bindex = 5; /* Default to 9600 */
283 baud = 9600;
284 }
285
286 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
287 0, /* set baud */
288 USB_TYPE_VENDOR
289 | USB_RECIP_INTERFACE
290 | USB_DIR_OUT, /* type */
291 bindex, /* value */
292 0, /* index */
293 NULL, /* &data */
294 0, /* size */
295 2000); /* timeout */
296 if (rc < 0)
297 return 0;
298
299 return baud;
300}
301
302static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
303{
304 struct usb_serial_port *port = tty->driver_data;
305 struct usb_serial *serial = port->serial;
306 int value;
307 int result;
308
309 if (break_state == -1)
310 value = 1; /* start break */
311 else
312 value = 0; /* clear break */
313
314 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
315 4, /* set break */
316 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
317 value, 0, NULL, 0, 2000);
318 if (result < 0)
319 dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n",
320 __func__, result);
321}
322
323static void keyspan_pda_set_termios(struct tty_struct *tty,
324 struct usb_serial_port *port,
325 const struct ktermios *old_termios)
326{
327 struct usb_serial *serial = port->serial;
328 speed_t speed;
329
330 /*
331 * cflag specifies lots of stuff: number of stop bits, parity, number
332 * of data bits, baud. What can the device actually handle?:
333 * CSTOPB (1 stop bit or 2)
334 * PARENB (parity)
335 * CSIZE (5bit .. 8bit)
336 * There is minimal hw support for parity (a PSW bit seems to hold the
337 * parity of whatever is in the accumulator). The UART either deals
338 * with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
339 * 1 special, stop). So, with firmware changes, we could do:
340 * 8N1: 10 bit
341 * 8N2: 11 bit, extra bit always (mark?)
342 * 8[EOMS]1: 11 bit, extra bit is parity
343 * 7[EOMS]1: 10 bit, b0/b7 is parity
344 * 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
345 *
346 * HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS
347 * bit.
348 *
349 * For now, just do baud.
350 */
351 speed = tty_get_baud_rate(tty);
352 speed = keyspan_pda_setbaud(serial, speed);
353
354 if (speed == 0) {
355 dev_dbg(&port->dev, "can't handle requested baud rate\n");
356 /* It hasn't changed so.. */
357 speed = tty_termios_baud_rate(old_termios);
358 }
359 /*
360 * Only speed can change so copy the old h/w parameters then encode
361 * the new speed.
362 */
363 tty_termios_copy_hw(&tty->termios, old_termios);
364 tty_encode_baud_rate(tty, speed, speed);
365}
366
367/*
368 * Modem control pins: DTR and RTS are outputs and can be controlled.
369 * DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
370 * read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused.
371 */
372static int keyspan_pda_get_modem_info(struct usb_serial *serial,
373 unsigned char *value)
374{
375 int rc;
376 u8 data;
377
378 rc = usb_control_msg_recv(serial->dev, 0,
379 3, /* get pins */
380 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_IN,
381 0,
382 0,
383 &data,
384 1,
385 2000,
386 GFP_KERNEL);
387 if (rc == 0)
388 *value = data;
389
390 return rc;
391}
392
393static int keyspan_pda_set_modem_info(struct usb_serial *serial,
394 unsigned char value)
395{
396 int rc;
397 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
398 3, /* set pins */
399 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
400 value, 0, NULL, 0, 2000);
401 return rc;
402}
403
404static int keyspan_pda_tiocmget(struct tty_struct *tty)
405{
406 struct usb_serial_port *port = tty->driver_data;
407 struct usb_serial *serial = port->serial;
408 int rc;
409 unsigned char status;
410 int value;
411
412 rc = keyspan_pda_get_modem_info(serial, &status);
413 if (rc < 0)
414 return rc;
415
416 value = ((status & BIT(7)) ? TIOCM_DTR : 0) |
417 ((status & BIT(6)) ? TIOCM_CAR : 0) |
418 ((status & BIT(5)) ? TIOCM_RNG : 0) |
419 ((status & BIT(4)) ? TIOCM_DSR : 0) |
420 ((status & BIT(3)) ? TIOCM_CTS : 0) |
421 ((status & BIT(2)) ? TIOCM_RTS : 0);
422
423 return value;
424}
425
426static int keyspan_pda_tiocmset(struct tty_struct *tty,
427 unsigned int set, unsigned int clear)
428{
429 struct usb_serial_port *port = tty->driver_data;
430 struct usb_serial *serial = port->serial;
431 int rc;
432 unsigned char status;
433
434 rc = keyspan_pda_get_modem_info(serial, &status);
435 if (rc < 0)
436 return rc;
437
438 if (set & TIOCM_RTS)
439 status |= BIT(2);
440 if (set & TIOCM_DTR)
441 status |= BIT(7);
442
443 if (clear & TIOCM_RTS)
444 status &= ~BIT(2);
445 if (clear & TIOCM_DTR)
446 status &= ~BIT(7);
447 rc = keyspan_pda_set_modem_info(serial, status);
448 return rc;
449}
450
451static int keyspan_pda_write_start(struct usb_serial_port *port)
452{
453 struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
454 unsigned long flags;
455 struct urb *urb;
456 int count;
457 int room;
458 int rc;
459
460 /*
461 * Guess how much room is left in the device's ring buffer. If our
462 * write will result in no room left, ask the device to give us an
463 * interrupt when the room available rises above a threshold but also
464 * query how much room is currently available (in case our guess was
465 * too conservative and the buffer is already empty when the
466 * unthrottle work is scheduled).
467 */
468
469 /*
470 * We might block because of:
471 * the TX urb is in-flight (wait until it completes)
472 * the device is full (wait until it says there is room)
473 */
474 spin_lock_irqsave(&port->lock, flags);
475
476 room = priv->tx_room;
477 count = kfifo_len(&port->write_fifo);
478
479 if (!test_bit(0, &port->write_urbs_free) || count == 0 || room == 0) {
480 spin_unlock_irqrestore(&port->lock, flags);
481 return 0;
482 }
483 __clear_bit(0, &port->write_urbs_free);
484
485 if (count > room)
486 count = room;
487 if (count > port->bulk_out_size)
488 count = port->bulk_out_size;
489
490 urb = port->write_urb;
491 count = kfifo_out(&port->write_fifo, urb->transfer_buffer, count);
492 urb->transfer_buffer_length = count;
493
494 port->tx_bytes += count;
495 priv->tx_room -= count;
496
497 spin_unlock_irqrestore(&port->lock, flags);
498
499 dev_dbg(&port->dev, "%s - count = %d, txroom = %d\n", __func__, count, room);
500
501 rc = usb_submit_urb(urb, GFP_ATOMIC);
502 if (rc) {
503 dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n");
504
505 spin_lock_irqsave(&port->lock, flags);
506 port->tx_bytes -= count;
507 priv->tx_room = max(priv->tx_room, room + count);
508 __set_bit(0, &port->write_urbs_free);
509 spin_unlock_irqrestore(&port->lock, flags);
510
511 return rc;
512 }
513
514 if (count == room)
515 schedule_work(&priv->unthrottle_work);
516
517 return count;
518}
519
520static void keyspan_pda_write_bulk_callback(struct urb *urb)
521{
522 struct usb_serial_port *port = urb->context;
523 unsigned long flags;
524
525 spin_lock_irqsave(&port->lock, flags);
526 port->tx_bytes -= urb->transfer_buffer_length;
527 __set_bit(0, &port->write_urbs_free);
528 spin_unlock_irqrestore(&port->lock, flags);
529
530 keyspan_pda_write_start(port);
531
532 usb_serial_port_softint(port);
533}
534
535static int keyspan_pda_write(struct tty_struct *tty, struct usb_serial_port *port,
536 const unsigned char *buf, int count)
537{
538 int rc;
539
540 dev_dbg(&port->dev, "%s - count = %d\n", __func__, count);
541
542 if (!count)
543 return 0;
544
545 count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);
546
547 rc = keyspan_pda_write_start(port);
548 if (rc)
549 return rc;
550
551 return count;
552}
553
554static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
555{
556 struct usb_serial *serial = port->serial;
557
558 if (on)
559 keyspan_pda_set_modem_info(serial, BIT(7) | BIT(2));
560 else
561 keyspan_pda_set_modem_info(serial, 0);
562}
563
564
565static int keyspan_pda_open(struct tty_struct *tty,
566 struct usb_serial_port *port)
567{
568 struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
569 int rc;
570
571 /* find out how much room is in the Tx ring */
572 rc = keyspan_pda_get_write_room(priv);
573 if (rc < 0)
574 return rc;
575
576 spin_lock_irq(&port->lock);
577 priv->tx_room = rc;
578 spin_unlock_irq(&port->lock);
579
580 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
581 if (rc) {
582 dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__);
583 return rc;
584 }
585
586 return 0;
587}
588
589static void keyspan_pda_close(struct usb_serial_port *port)
590{
591 struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
592
593 /*
594 * Stop the interrupt URB first as its completion handler may submit
595 * the write URB.
596 */
597 usb_kill_urb(port->interrupt_in_urb);
598 usb_kill_urb(port->write_urb);
599
600 cancel_work_sync(&priv->unthrottle_work);
601
602 spin_lock_irq(&port->lock);
603 kfifo_reset(&port->write_fifo);
604 spin_unlock_irq(&port->lock);
605}
606
607/* download the firmware to a "fake" device (pre-renumeration) */
608static int keyspan_pda_fake_startup(struct usb_serial *serial)
609{
610 unsigned int vid = le16_to_cpu(serial->dev->descriptor.idVendor);
611 const char *fw_name;
612
613 /* download the firmware here ... */
614 ezusb_fx1_set_reset(serial->dev, 1);
615
616 switch (vid) {
617 case KEYSPAN_VENDOR_ID:
618 fw_name = "keyspan_pda/keyspan_pda.fw";
619 break;
620 case XIRCOM_VENDOR_ID:
621 case ENTREGA_VENDOR_ID:
622 fw_name = "keyspan_pda/xircom_pgs.fw";
623 break;
624 default:
625 dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
626 __func__);
627 return -ENODEV;
628 }
629
630 if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) {
631 dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
632 fw_name);
633 return -ENOENT;
634 }
635
636 /*
637 * After downloading firmware renumeration will occur in a moment and
638 * the new device will bind to the real driver.
639 */
640
641 /* We want this device to fail to have a driver assigned to it. */
642 return 1;
643}
644
645MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
646MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
647
648static int keyspan_pda_port_probe(struct usb_serial_port *port)
649{
650
651 struct keyspan_pda_private *priv;
652
653 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
654 if (!priv)
655 return -ENOMEM;
656
657 INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
658 priv->port = port;
659
660 usb_set_serial_port_data(port, priv);
661
662 return 0;
663}
664
665static void keyspan_pda_port_remove(struct usb_serial_port *port)
666{
667 struct keyspan_pda_private *priv;
668
669 priv = usb_get_serial_port_data(port);
670 kfree(priv);
671}
672
673static struct usb_serial_driver keyspan_pda_fake_device = {
674 .driver = {
675 .owner = THIS_MODULE,
676 .name = "keyspan_pda_pre",
677 },
678 .description = "Keyspan PDA - (prerenumeration)",
679 .id_table = id_table_fake,
680 .num_ports = 1,
681 .attach = keyspan_pda_fake_startup,
682};
683
684static struct usb_serial_driver keyspan_pda_device = {
685 .driver = {
686 .owner = THIS_MODULE,
687 .name = "keyspan_pda",
688 },
689 .description = "Keyspan PDA",
690 .id_table = id_table_std,
691 .num_ports = 1,
692 .num_bulk_out = 1,
693 .num_interrupt_in = 1,
694 .dtr_rts = keyspan_pda_dtr_rts,
695 .open = keyspan_pda_open,
696 .close = keyspan_pda_close,
697 .write = keyspan_pda_write,
698 .write_bulk_callback = keyspan_pda_write_bulk_callback,
699 .read_int_callback = keyspan_pda_rx_interrupt,
700 .throttle = keyspan_pda_rx_throttle,
701 .unthrottle = keyspan_pda_rx_unthrottle,
702 .set_termios = keyspan_pda_set_termios,
703 .break_ctl = keyspan_pda_break_ctl,
704 .tiocmget = keyspan_pda_tiocmget,
705 .tiocmset = keyspan_pda_tiocmset,
706 .port_probe = keyspan_pda_port_probe,
707 .port_remove = keyspan_pda_port_remove,
708};
709
710static struct usb_serial_driver * const serial_drivers[] = {
711 &keyspan_pda_device,
712 &keyspan_pda_fake_device,
713 NULL
714};
715
716module_usb_serial_driver(serial_drivers, id_table_combined);
717
718MODULE_AUTHOR(DRIVER_AUTHOR);
719MODULE_DESCRIPTION(DRIVER_DESC);
720MODULE_LICENSE("GPL");
1/*
2 * USB Keyspan PDA / Xircom / Entregra Converter driver
3 *
4 * Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 1999, 2000 Brian Warner <warner@lothar.com>
6 * Copyright (C) 2000 Al Borchers <borchers@steinerpoint.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * See Documentation/usb/usb-serial.txt for more information on using this
14 * driver
15 */
16
17
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/init.h>
21#include <linux/slab.h>
22#include <linux/tty.h>
23#include <linux/tty_driver.h>
24#include <linux/tty_flip.h>
25#include <linux/module.h>
26#include <linux/spinlock.h>
27#include <linux/workqueue.h>
28#include <linux/firmware.h>
29#include <linux/ihex.h>
30#include <linux/uaccess.h>
31#include <linux/usb.h>
32#include <linux/usb/serial.h>
33
34static bool debug;
35
36/* make a simple define to handle if we are compiling keyspan_pda or xircom support */
37#if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
38 #define KEYSPAN
39#else
40 #undef KEYSPAN
41#endif
42#if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
43 #define XIRCOM
44#else
45 #undef XIRCOM
46#endif
47
48/*
49 * Version Information
50 */
51#define DRIVER_VERSION "v1.1"
52#define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
53#define DRIVER_DESC "USB Keyspan PDA Converter driver"
54
55struct keyspan_pda_private {
56 int tx_room;
57 int tx_throttled;
58 struct work_struct wakeup_work;
59 struct work_struct unthrottle_work;
60 struct usb_serial *serial;
61 struct usb_serial_port *port;
62};
63
64
65#define KEYSPAN_VENDOR_ID 0x06cd
66#define KEYSPAN_PDA_FAKE_ID 0x0103
67#define KEYSPAN_PDA_ID 0x0104 /* no clue */
68
69/* For Xircom PGSDB9 and older Entregra version of the same device */
70#define XIRCOM_VENDOR_ID 0x085a
71#define XIRCOM_FAKE_ID 0x8027
72#define ENTREGRA_VENDOR_ID 0x1645
73#define ENTREGRA_FAKE_ID 0x8093
74
75static const struct usb_device_id id_table_combined[] = {
76#ifdef KEYSPAN
77 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
78#endif
79#ifdef XIRCOM
80 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
81 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
82#endif
83 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
84 { } /* Terminating entry */
85};
86
87MODULE_DEVICE_TABLE(usb, id_table_combined);
88
89static const struct usb_device_id id_table_std[] = {
90 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
91 { } /* Terminating entry */
92};
93
94#ifdef KEYSPAN
95static const struct usb_device_id id_table_fake[] = {
96 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
97 { } /* Terminating entry */
98};
99#endif
100
101#ifdef XIRCOM
102static const struct usb_device_id id_table_fake_xircom[] = {
103 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
104 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
105 { }
106};
107#endif
108
109static void keyspan_pda_wakeup_write(struct work_struct *work)
110{
111 struct keyspan_pda_private *priv =
112 container_of(work, struct keyspan_pda_private, wakeup_work);
113 struct usb_serial_port *port = priv->port;
114 struct tty_struct *tty = tty_port_tty_get(&port->port);
115 if (tty)
116 tty_wakeup(tty);
117 tty_kref_put(tty);
118}
119
120static void keyspan_pda_request_unthrottle(struct work_struct *work)
121{
122 struct keyspan_pda_private *priv =
123 container_of(work, struct keyspan_pda_private, unthrottle_work);
124 struct usb_serial *serial = priv->serial;
125 int result;
126
127 /* ask the device to tell us when the tx buffer becomes
128 sufficiently empty */
129 result = usb_control_msg(serial->dev,
130 usb_sndctrlpipe(serial->dev, 0),
131 7, /* request_unthrottle */
132 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
133 | USB_DIR_OUT,
134 16, /* value: threshold */
135 0, /* index */
136 NULL,
137 0,
138 2000);
139 if (result < 0)
140 dbg("%s - error %d from usb_control_msg",
141 __func__, result);
142}
143
144
145static void keyspan_pda_rx_interrupt(struct urb *urb)
146{
147 struct usb_serial_port *port = urb->context;
148 struct tty_struct *tty;
149 unsigned char *data = urb->transfer_buffer;
150 int retval;
151 int status = urb->status;
152 struct keyspan_pda_private *priv;
153 priv = usb_get_serial_port_data(port);
154
155 switch (status) {
156 case 0:
157 /* success */
158 break;
159 case -ECONNRESET:
160 case -ENOENT:
161 case -ESHUTDOWN:
162 /* this urb is terminated, clean up */
163 dbg("%s - urb shutting down with status: %d",
164 __func__, status);
165 return;
166 default:
167 dbg("%s - nonzero urb status received: %d",
168 __func__, status);
169 goto exit;
170 }
171
172 /* see if the message is data or a status interrupt */
173 switch (data[0]) {
174 case 0:
175 tty = tty_port_tty_get(&port->port);
176 /* rest of message is rx data */
177 if (tty && urb->actual_length) {
178 tty_insert_flip_string(tty, data + 1,
179 urb->actual_length - 1);
180 tty_flip_buffer_push(tty);
181 }
182 tty_kref_put(tty);
183 break;
184 case 1:
185 /* status interrupt */
186 dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
187 switch (data[1]) {
188 case 1: /* modemline change */
189 break;
190 case 2: /* tx unthrottle interrupt */
191 priv->tx_throttled = 0;
192 /* queue up a wakeup at scheduler time */
193 schedule_work(&priv->wakeup_work);
194 break;
195 default:
196 break;
197 }
198 break;
199 default:
200 break;
201 }
202
203exit:
204 retval = usb_submit_urb(urb, GFP_ATOMIC);
205 if (retval)
206 dev_err(&port->dev,
207 "%s - usb_submit_urb failed with result %d",
208 __func__, retval);
209}
210
211
212static void keyspan_pda_rx_throttle(struct tty_struct *tty)
213{
214 /* stop receiving characters. We just turn off the URB request, and
215 let chars pile up in the device. If we're doing hardware
216 flowcontrol, the device will signal the other end when its buffer
217 fills up. If we're doing XON/XOFF, this would be a good time to
218 send an XOFF, although it might make sense to foist that off
219 upon the device too. */
220 struct usb_serial_port *port = tty->driver_data;
221
222 usb_kill_urb(port->interrupt_in_urb);
223}
224
225
226static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
227{
228 struct usb_serial_port *port = tty->driver_data;
229 /* just restart the receive interrupt URB */
230
231 if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
232 dbg(" usb_submit_urb(read urb) failed");
233}
234
235
236static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
237{
238 int rc;
239 int bindex;
240
241 switch (baud) {
242 case 110:
243 bindex = 0;
244 break;
245 case 300:
246 bindex = 1;
247 break;
248 case 1200:
249 bindex = 2;
250 break;
251 case 2400:
252 bindex = 3;
253 break;
254 case 4800:
255 bindex = 4;
256 break;
257 case 9600:
258 bindex = 5;
259 break;
260 case 19200:
261 bindex = 6;
262 break;
263 case 38400:
264 bindex = 7;
265 break;
266 case 57600:
267 bindex = 8;
268 break;
269 case 115200:
270 bindex = 9;
271 break;
272 default:
273 bindex = 5; /* Default to 9600 */
274 baud = 9600;
275 }
276
277 /* rather than figure out how to sleep while waiting for this
278 to complete, I just use the "legacy" API. */
279 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
280 0, /* set baud */
281 USB_TYPE_VENDOR
282 | USB_RECIP_INTERFACE
283 | USB_DIR_OUT, /* type */
284 bindex, /* value */
285 0, /* index */
286 NULL, /* &data */
287 0, /* size */
288 2000); /* timeout */
289 if (rc < 0)
290 return 0;
291 return baud;
292}
293
294
295static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
296{
297 struct usb_serial_port *port = tty->driver_data;
298 struct usb_serial *serial = port->serial;
299 int value;
300 int result;
301
302 if (break_state == -1)
303 value = 1; /* start break */
304 else
305 value = 0; /* clear break */
306 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
307 4, /* set break */
308 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
309 value, 0, NULL, 0, 2000);
310 if (result < 0)
311 dbg("%s - error %d from usb_control_msg",
312 __func__, result);
313 /* there is something funky about this.. the TCSBRK that 'cu' performs
314 ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
315 seconds apart, but it feels like the break sent isn't as long as it
316 is on /dev/ttyS0 */
317}
318
319
320static void keyspan_pda_set_termios(struct tty_struct *tty,
321 struct usb_serial_port *port, struct ktermios *old_termios)
322{
323 struct usb_serial *serial = port->serial;
324 speed_t speed;
325
326 /* cflag specifies lots of stuff: number of stop bits, parity, number
327 of data bits, baud. What can the device actually handle?:
328 CSTOPB (1 stop bit or 2)
329 PARENB (parity)
330 CSIZE (5bit .. 8bit)
331 There is minimal hw support for parity (a PSW bit seems to hold the
332 parity of whatever is in the accumulator). The UART either deals
333 with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
334 1 special, stop). So, with firmware changes, we could do:
335 8N1: 10 bit
336 8N2: 11 bit, extra bit always (mark?)
337 8[EOMS]1: 11 bit, extra bit is parity
338 7[EOMS]1: 10 bit, b0/b7 is parity
339 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
340
341 HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
342 bit.
343
344 For now, just do baud. */
345
346 speed = tty_get_baud_rate(tty);
347 speed = keyspan_pda_setbaud(serial, speed);
348
349 if (speed == 0) {
350 dbg("can't handle requested baud rate");
351 /* It hasn't changed so.. */
352 speed = tty_termios_baud_rate(old_termios);
353 }
354 /* Only speed can change so copy the old h/w parameters
355 then encode the new speed */
356 tty_termios_copy_hw(tty->termios, old_termios);
357 tty_encode_baud_rate(tty, speed, speed);
358}
359
360
361/* modem control pins: DTR and RTS are outputs and can be controlled.
362 DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
363 read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
364
365static int keyspan_pda_get_modem_info(struct usb_serial *serial,
366 unsigned char *value)
367{
368 int rc;
369 u8 *data;
370
371 data = kmalloc(1, GFP_KERNEL);
372 if (!data)
373 return -ENOMEM;
374
375 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
376 3, /* get pins */
377 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
378 0, 0, data, 1, 2000);
379 if (rc >= 0)
380 *value = *data;
381
382 kfree(data);
383 return rc;
384}
385
386
387static int keyspan_pda_set_modem_info(struct usb_serial *serial,
388 unsigned char value)
389{
390 int rc;
391 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
392 3, /* set pins */
393 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
394 value, 0, NULL, 0, 2000);
395 return rc;
396}
397
398static int keyspan_pda_tiocmget(struct tty_struct *tty)
399{
400 struct usb_serial_port *port = tty->driver_data;
401 struct usb_serial *serial = port->serial;
402 int rc;
403 unsigned char status;
404 int value;
405
406 rc = keyspan_pda_get_modem_info(serial, &status);
407 if (rc < 0)
408 return rc;
409 value =
410 ((status & (1<<7)) ? TIOCM_DTR : 0) |
411 ((status & (1<<6)) ? TIOCM_CAR : 0) |
412 ((status & (1<<5)) ? TIOCM_RNG : 0) |
413 ((status & (1<<4)) ? TIOCM_DSR : 0) |
414 ((status & (1<<3)) ? TIOCM_CTS : 0) |
415 ((status & (1<<2)) ? TIOCM_RTS : 0);
416 return value;
417}
418
419static int keyspan_pda_tiocmset(struct tty_struct *tty,
420 unsigned int set, unsigned int clear)
421{
422 struct usb_serial_port *port = tty->driver_data;
423 struct usb_serial *serial = port->serial;
424 int rc;
425 unsigned char status;
426
427 rc = keyspan_pda_get_modem_info(serial, &status);
428 if (rc < 0)
429 return rc;
430
431 if (set & TIOCM_RTS)
432 status |= (1<<2);
433 if (set & TIOCM_DTR)
434 status |= (1<<7);
435
436 if (clear & TIOCM_RTS)
437 status &= ~(1<<2);
438 if (clear & TIOCM_DTR)
439 status &= ~(1<<7);
440 rc = keyspan_pda_set_modem_info(serial, status);
441 return rc;
442}
443
444static int keyspan_pda_write(struct tty_struct *tty,
445 struct usb_serial_port *port, const unsigned char *buf, int count)
446{
447 struct usb_serial *serial = port->serial;
448 int request_unthrottle = 0;
449 int rc = 0;
450 struct keyspan_pda_private *priv;
451
452 priv = usb_get_serial_port_data(port);
453 /* guess how much room is left in the device's ring buffer, and if we
454 want to send more than that, check first, updating our notion of
455 what is left. If our write will result in no room left, ask the
456 device to give us an interrupt when the room available rises above
457 a threshold, and hold off all writers (eventually, those using
458 select() or poll() too) until we receive that unthrottle interrupt.
459 Block if we can't write anything at all, otherwise write as much as
460 we can. */
461 if (count == 0) {
462 dbg(" write request of 0 bytes");
463 return 0;
464 }
465
466 /* we might block because of:
467 the TX urb is in-flight (wait until it completes)
468 the device is full (wait until it says there is room)
469 */
470 spin_lock_bh(&port->lock);
471 if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) {
472 spin_unlock_bh(&port->lock);
473 return 0;
474 }
475 clear_bit(0, &port->write_urbs_free);
476 spin_unlock_bh(&port->lock);
477
478 /* At this point the URB is in our control, nobody else can submit it
479 again (the only sudden transition was the one from EINPROGRESS to
480 finished). Also, the tx process is not throttled. So we are
481 ready to write. */
482
483 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
484
485 /* Check if we might overrun the Tx buffer. If so, ask the
486 device how much room it really has. This is done only on
487 scheduler time, since usb_control_msg() sleeps. */
488 if (count > priv->tx_room && !in_interrupt()) {
489 u8 *room;
490
491 room = kmalloc(1, GFP_KERNEL);
492 if (!room) {
493 rc = -ENOMEM;
494 goto exit;
495 }
496
497 rc = usb_control_msg(serial->dev,
498 usb_rcvctrlpipe(serial->dev, 0),
499 6, /* write_room */
500 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
501 | USB_DIR_IN,
502 0, /* value: 0 means "remaining room" */
503 0, /* index */
504 room,
505 1,
506 2000);
507 if (rc > 0) {
508 dbg(" roomquery says %d", *room);
509 priv->tx_room = *room;
510 }
511 kfree(room);
512 if (rc < 0) {
513 dbg(" roomquery failed");
514 goto exit;
515 }
516 if (rc == 0) {
517 dbg(" roomquery returned 0 bytes");
518 rc = -EIO; /* device didn't return any data */
519 goto exit;
520 }
521 }
522 if (count > priv->tx_room) {
523 /* we're about to completely fill the Tx buffer, so
524 we'll be throttled afterwards. */
525 count = priv->tx_room;
526 request_unthrottle = 1;
527 }
528
529 if (count) {
530 /* now transfer data */
531 memcpy(port->write_urb->transfer_buffer, buf, count);
532 /* send the data out the bulk port */
533 port->write_urb->transfer_buffer_length = count;
534
535 priv->tx_room -= count;
536
537 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
538 if (rc) {
539 dbg(" usb_submit_urb(write bulk) failed");
540 goto exit;
541 }
542 } else {
543 /* There wasn't any room left, so we are throttled until
544 the buffer empties a bit */
545 request_unthrottle = 1;
546 }
547
548 if (request_unthrottle) {
549 priv->tx_throttled = 1; /* block writers */
550 schedule_work(&priv->unthrottle_work);
551 }
552
553 rc = count;
554exit:
555 if (rc < 0)
556 set_bit(0, &port->write_urbs_free);
557 return rc;
558}
559
560
561static void keyspan_pda_write_bulk_callback(struct urb *urb)
562{
563 struct usb_serial_port *port = urb->context;
564 struct keyspan_pda_private *priv;
565
566 set_bit(0, &port->write_urbs_free);
567 priv = usb_get_serial_port_data(port);
568
569 /* queue up a wakeup at scheduler time */
570 schedule_work(&priv->wakeup_work);
571}
572
573
574static int keyspan_pda_write_room(struct tty_struct *tty)
575{
576 struct usb_serial_port *port = tty->driver_data;
577 struct keyspan_pda_private *priv;
578 priv = usb_get_serial_port_data(port);
579 /* used by n_tty.c for processing of tabs and such. Giving it our
580 conservative guess is probably good enough, but needs testing by
581 running a console through the device. */
582 return priv->tx_room;
583}
584
585
586static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
587{
588 struct usb_serial_port *port = tty->driver_data;
589 struct keyspan_pda_private *priv;
590 unsigned long flags;
591 int ret = 0;
592
593 priv = usb_get_serial_port_data(port);
594
595 /* when throttled, return at least WAKEUP_CHARS to tell select() (via
596 n_tty.c:normal_poll() ) that we're not writeable. */
597
598 spin_lock_irqsave(&port->lock, flags);
599 if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled)
600 ret = 256;
601 spin_unlock_irqrestore(&port->lock, flags);
602 return ret;
603}
604
605
606static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
607{
608 struct usb_serial *serial = port->serial;
609
610 if (serial->dev) {
611 if (on)
612 keyspan_pda_set_modem_info(serial, (1<<7) | (1<< 2));
613 else
614 keyspan_pda_set_modem_info(serial, 0);
615 }
616}
617
618
619static int keyspan_pda_open(struct tty_struct *tty,
620 struct usb_serial_port *port)
621{
622 struct usb_serial *serial = port->serial;
623 u8 *room;
624 int rc = 0;
625 struct keyspan_pda_private *priv;
626
627 /* find out how much room is in the Tx ring */
628 room = kmalloc(1, GFP_KERNEL);
629 if (!room)
630 return -ENOMEM;
631
632 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
633 6, /* write_room */
634 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
635 | USB_DIR_IN,
636 0, /* value */
637 0, /* index */
638 room,
639 1,
640 2000);
641 if (rc < 0) {
642 dbg("%s - roomquery failed", __func__);
643 goto error;
644 }
645 if (rc == 0) {
646 dbg("%s - roomquery returned 0 bytes", __func__);
647 rc = -EIO;
648 goto error;
649 }
650 priv = usb_get_serial_port_data(port);
651 priv->tx_room = *room;
652 priv->tx_throttled = *room ? 0 : 1;
653
654 /*Start reading from the device*/
655 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
656 if (rc) {
657 dbg("%s - usb_submit_urb(read int) failed", __func__);
658 goto error;
659 }
660error:
661 kfree(room);
662 return rc;
663}
664static void keyspan_pda_close(struct usb_serial_port *port)
665{
666 struct usb_serial *serial = port->serial;
667
668 if (serial->dev) {
669 /* shutdown our bulk reads and writes */
670 usb_kill_urb(port->write_urb);
671 usb_kill_urb(port->interrupt_in_urb);
672 }
673}
674
675
676/* download the firmware to a "fake" device (pre-renumeration) */
677static int keyspan_pda_fake_startup(struct usb_serial *serial)
678{
679 int response;
680 const char *fw_name;
681 const struct ihex_binrec *record;
682 const struct firmware *fw;
683
684 /* download the firmware here ... */
685 response = ezusb_set_reset(serial, 1);
686
687 if (0) { ; }
688#ifdef KEYSPAN
689 else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
690 fw_name = "keyspan_pda/keyspan_pda.fw";
691#endif
692#ifdef XIRCOM
693 else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
694 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
695 fw_name = "keyspan_pda/xircom_pgs.fw";
696#endif
697 else {
698 dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
699 __func__);
700 return -ENODEV;
701 }
702 if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) {
703 dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
704 fw_name);
705 return -ENOENT;
706 }
707 record = (const struct ihex_binrec *)fw->data;
708
709 while (record) {
710 response = ezusb_writememory(serial, be32_to_cpu(record->addr),
711 (unsigned char *)record->data,
712 be16_to_cpu(record->len), 0xa0);
713 if (response < 0) {
714 dev_err(&serial->dev->dev, "ezusb_writememory failed "
715 "for Keyspan PDA firmware (%d %04X %p %d)\n",
716 response, be32_to_cpu(record->addr),
717 record->data, be16_to_cpu(record->len));
718 break;
719 }
720 record = ihex_next_binrec(record);
721 }
722 release_firmware(fw);
723 /* bring device out of reset. Renumeration will occur in a moment
724 and the new device will bind to the real driver */
725 response = ezusb_set_reset(serial, 0);
726
727 /* we want this device to fail to have a driver assigned to it. */
728 return 1;
729}
730
731#ifdef KEYSPAN
732MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
733#endif
734#ifdef XIRCOM
735MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
736#endif
737
738static int keyspan_pda_startup(struct usb_serial *serial)
739{
740
741 struct keyspan_pda_private *priv;
742
743 /* allocate the private data structures for all ports. Well, for all
744 one ports. */
745
746 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
747 if (!priv)
748 return 1; /* error */
749 usb_set_serial_port_data(serial->port[0], priv);
750 init_waitqueue_head(&serial->port[0]->write_wait);
751 INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
752 INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
753 priv->serial = serial;
754 priv->port = serial->port[0];
755 return 0;
756}
757
758static void keyspan_pda_release(struct usb_serial *serial)
759{
760 kfree(usb_get_serial_port_data(serial->port[0]));
761}
762
763#ifdef KEYSPAN
764static struct usb_serial_driver keyspan_pda_fake_device = {
765 .driver = {
766 .owner = THIS_MODULE,
767 .name = "keyspan_pda_pre",
768 },
769 .description = "Keyspan PDA - (prerenumeration)",
770 .id_table = id_table_fake,
771 .num_ports = 1,
772 .attach = keyspan_pda_fake_startup,
773};
774#endif
775
776#ifdef XIRCOM
777static struct usb_serial_driver xircom_pgs_fake_device = {
778 .driver = {
779 .owner = THIS_MODULE,
780 .name = "xircom_no_firm",
781 },
782 .description = "Xircom / Entregra PGS - (prerenumeration)",
783 .id_table = id_table_fake_xircom,
784 .num_ports = 1,
785 .attach = keyspan_pda_fake_startup,
786};
787#endif
788
789static struct usb_serial_driver keyspan_pda_device = {
790 .driver = {
791 .owner = THIS_MODULE,
792 .name = "keyspan_pda",
793 },
794 .description = "Keyspan PDA",
795 .id_table = id_table_std,
796 .num_ports = 1,
797 .dtr_rts = keyspan_pda_dtr_rts,
798 .open = keyspan_pda_open,
799 .close = keyspan_pda_close,
800 .write = keyspan_pda_write,
801 .write_room = keyspan_pda_write_room,
802 .write_bulk_callback = keyspan_pda_write_bulk_callback,
803 .read_int_callback = keyspan_pda_rx_interrupt,
804 .chars_in_buffer = keyspan_pda_chars_in_buffer,
805 .throttle = keyspan_pda_rx_throttle,
806 .unthrottle = keyspan_pda_rx_unthrottle,
807 .set_termios = keyspan_pda_set_termios,
808 .break_ctl = keyspan_pda_break_ctl,
809 .tiocmget = keyspan_pda_tiocmget,
810 .tiocmset = keyspan_pda_tiocmset,
811 .attach = keyspan_pda_startup,
812 .release = keyspan_pda_release,
813};
814
815static struct usb_serial_driver * const serial_drivers[] = {
816 &keyspan_pda_device,
817#ifdef KEYSPAN
818 &keyspan_pda_fake_device,
819#endif
820#ifdef XIRCOM
821 &xircom_pgs_fake_device,
822#endif
823 NULL
824};
825
826module_usb_serial_driver(serial_drivers, id_table_combined);
827
828MODULE_AUTHOR(DRIVER_AUTHOR);
829MODULE_DESCRIPTION(DRIVER_DESC);
830MODULE_LICENSE("GPL");
831
832module_param(debug, bool, S_IRUGO | S_IWUSR);
833MODULE_PARM_DESC(debug, "Debug enabled or not");