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 room = kmalloc(1, GFP_KERNEL);
84 if (!room)
85 return -ENOMEM;
86
87 rc = usb_control_msg(serial->dev,
88 usb_rcvctrlpipe(serial->dev, 0),
89 6, /* write_room */
90 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
91 | USB_DIR_IN,
92 0, /* value: 0 means "remaining room" */
93 0, /* index */
94 room,
95 1,
96 2000);
97 if (rc != 1) {
98 if (rc >= 0)
99 rc = -EIO;
100 dev_dbg(&port->dev, "roomquery failed: %d\n", rc);
101 goto out_free;
102 }
103
104 dev_dbg(&port->dev, "roomquery says %d\n", *room);
105 rc = *room;
106out_free:
107 kfree(room);
108
109 return rc;
110}
111
112static void keyspan_pda_request_unthrottle(struct work_struct *work)
113{
114 struct keyspan_pda_private *priv =
115 container_of(work, struct keyspan_pda_private, unthrottle_work);
116 struct usb_serial_port *port = priv->port;
117 struct usb_serial *serial = port->serial;
118 unsigned long flags;
119 int result;
120
121 dev_dbg(&port->dev, "%s\n", __func__);
122
123 /*
124 * Ask the device to tell us when the tx buffer becomes
125 * sufficiently empty.
126 */
127 result = usb_control_msg(serial->dev,
128 usb_sndctrlpipe(serial->dev, 0),
129 7, /* request_unthrottle */
130 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
131 | USB_DIR_OUT,
132 KEYSPAN_TX_THRESHOLD,
133 0, /* index */
134 NULL,
135 0,
136 2000);
137 if (result < 0)
138 dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n",
139 __func__, result);
140 /*
141 * Need to check available space after requesting notification in case
142 * buffer is already empty so that no notification is sent.
143 */
144 result = keyspan_pda_get_write_room(priv);
145 if (result > KEYSPAN_TX_THRESHOLD) {
146 spin_lock_irqsave(&port->lock, flags);
147 priv->tx_room = max(priv->tx_room, result);
148 spin_unlock_irqrestore(&port->lock, flags);
149
150 usb_serial_port_softint(port);
151 }
152}
153
154static void keyspan_pda_rx_interrupt(struct urb *urb)
155{
156 struct usb_serial_port *port = urb->context;
157 unsigned char *data = urb->transfer_buffer;
158 unsigned int len = urb->actual_length;
159 int retval;
160 int status = urb->status;
161 struct keyspan_pda_private *priv;
162 unsigned long flags;
163
164 priv = usb_get_serial_port_data(port);
165
166 switch (status) {
167 case 0:
168 /* success */
169 break;
170 case -ECONNRESET:
171 case -ENOENT:
172 case -ESHUTDOWN:
173 /* this urb is terminated, clean up */
174 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
175 return;
176 default:
177 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
178 goto exit;
179 }
180
181 if (len < 1) {
182 dev_warn(&port->dev, "short message received\n");
183 goto exit;
184 }
185
186 /* see if the message is data or a status interrupt */
187 switch (data[0]) {
188 case 0:
189 /* rest of message is rx data */
190 if (len < 2)
191 break;
192 tty_insert_flip_string(&port->port, data + 1, len - 1);
193 tty_flip_buffer_push(&port->port);
194 break;
195 case 1:
196 /* status interrupt */
197 if (len < 2) {
198 dev_warn(&port->dev, "short interrupt message received\n");
199 break;
200 }
201 dev_dbg(&port->dev, "rx int, d1=%d\n", data[1]);
202 switch (data[1]) {
203 case 1: /* modemline change */
204 break;
205 case 2: /* tx unthrottle interrupt */
206 spin_lock_irqsave(&port->lock, flags);
207 priv->tx_room = max(priv->tx_room, KEYSPAN_TX_THRESHOLD);
208 spin_unlock_irqrestore(&port->lock, flags);
209
210 keyspan_pda_write_start(port);
211
212 usb_serial_port_softint(port);
213 break;
214 default:
215 break;
216 }
217 break;
218 default:
219 break;
220 }
221
222exit:
223 retval = usb_submit_urb(urb, GFP_ATOMIC);
224 if (retval)
225 dev_err(&port->dev,
226 "%s - usb_submit_urb failed with result %d\n",
227 __func__, retval);
228}
229
230static void keyspan_pda_rx_throttle(struct tty_struct *tty)
231{
232 struct usb_serial_port *port = tty->driver_data;
233
234 /*
235 * Stop receiving characters. We just turn off the URB request, and
236 * let chars pile up in the device. If we're doing hardware
237 * flowcontrol, the device will signal the other end when its buffer
238 * fills up. If we're doing XON/XOFF, this would be a good time to
239 * send an XOFF, although it might make sense to foist that off upon
240 * the device too.
241 */
242 usb_kill_urb(port->interrupt_in_urb);
243}
244
245static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
246{
247 struct usb_serial_port *port = tty->driver_data;
248
249 /* just restart the receive interrupt URB */
250 if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
251 dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n");
252}
253
254static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
255{
256 int rc;
257 int bindex;
258
259 switch (baud) {
260 case 110:
261 bindex = 0;
262 break;
263 case 300:
264 bindex = 1;
265 break;
266 case 1200:
267 bindex = 2;
268 break;
269 case 2400:
270 bindex = 3;
271 break;
272 case 4800:
273 bindex = 4;
274 break;
275 case 9600:
276 bindex = 5;
277 break;
278 case 19200:
279 bindex = 6;
280 break;
281 case 38400:
282 bindex = 7;
283 break;
284 case 57600:
285 bindex = 8;
286 break;
287 case 115200:
288 bindex = 9;
289 break;
290 default:
291 bindex = 5; /* Default to 9600 */
292 baud = 9600;
293 }
294
295 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
296 0, /* set baud */
297 USB_TYPE_VENDOR
298 | USB_RECIP_INTERFACE
299 | USB_DIR_OUT, /* type */
300 bindex, /* value */
301 0, /* index */
302 NULL, /* &data */
303 0, /* size */
304 2000); /* timeout */
305 if (rc < 0)
306 return 0;
307
308 return baud;
309}
310
311static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
312{
313 struct usb_serial_port *port = tty->driver_data;
314 struct usb_serial *serial = port->serial;
315 int value;
316 int result;
317
318 if (break_state == -1)
319 value = 1; /* start break */
320 else
321 value = 0; /* clear break */
322
323 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
324 4, /* set break */
325 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
326 value, 0, NULL, 0, 2000);
327 if (result < 0)
328 dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n",
329 __func__, result);
330}
331
332static void keyspan_pda_set_termios(struct tty_struct *tty,
333 struct usb_serial_port *port, struct ktermios *old_termios)
334{
335 struct usb_serial *serial = port->serial;
336 speed_t speed;
337
338 /*
339 * cflag specifies lots of stuff: number of stop bits, parity, number
340 * of data bits, baud. What can the device actually handle?:
341 * CSTOPB (1 stop bit or 2)
342 * PARENB (parity)
343 * CSIZE (5bit .. 8bit)
344 * There is minimal hw support for parity (a PSW bit seems to hold the
345 * parity of whatever is in the accumulator). The UART either deals
346 * with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
347 * 1 special, stop). So, with firmware changes, we could do:
348 * 8N1: 10 bit
349 * 8N2: 11 bit, extra bit always (mark?)
350 * 8[EOMS]1: 11 bit, extra bit is parity
351 * 7[EOMS]1: 10 bit, b0/b7 is parity
352 * 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
353 *
354 * HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS
355 * bit.
356 *
357 * For now, just do baud.
358 */
359 speed = tty_get_baud_rate(tty);
360 speed = keyspan_pda_setbaud(serial, speed);
361
362 if (speed == 0) {
363 dev_dbg(&port->dev, "can't handle requested baud rate\n");
364 /* It hasn't changed so.. */
365 speed = tty_termios_baud_rate(old_termios);
366 }
367 /*
368 * Only speed can change so copy the old h/w parameters then encode
369 * the new speed.
370 */
371 tty_termios_copy_hw(&tty->termios, old_termios);
372 tty_encode_baud_rate(tty, speed, speed);
373}
374
375/*
376 * Modem control pins: DTR and RTS are outputs and can be controlled.
377 * DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
378 * read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused.
379 */
380static int keyspan_pda_get_modem_info(struct usb_serial *serial,
381 unsigned char *value)
382{
383 int rc;
384 u8 *data;
385
386 data = kmalloc(1, GFP_KERNEL);
387 if (!data)
388 return -ENOMEM;
389
390 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
391 3, /* get pins */
392 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
393 0, 0, data, 1, 2000);
394 if (rc == 1)
395 *value = *data;
396 else if (rc >= 0)
397 rc = -EIO;
398
399 kfree(data);
400 return rc;
401}
402
403static int keyspan_pda_set_modem_info(struct usb_serial *serial,
404 unsigned char value)
405{
406 int rc;
407 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
408 3, /* set pins */
409 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
410 value, 0, NULL, 0, 2000);
411 return rc;
412}
413
414static int keyspan_pda_tiocmget(struct tty_struct *tty)
415{
416 struct usb_serial_port *port = tty->driver_data;
417 struct usb_serial *serial = port->serial;
418 int rc;
419 unsigned char status;
420 int value;
421
422 rc = keyspan_pda_get_modem_info(serial, &status);
423 if (rc < 0)
424 return rc;
425
426 value = ((status & BIT(7)) ? TIOCM_DTR : 0) |
427 ((status & BIT(6)) ? TIOCM_CAR : 0) |
428 ((status & BIT(5)) ? TIOCM_RNG : 0) |
429 ((status & BIT(4)) ? TIOCM_DSR : 0) |
430 ((status & BIT(3)) ? TIOCM_CTS : 0) |
431 ((status & BIT(2)) ? TIOCM_RTS : 0);
432
433 return value;
434}
435
436static int keyspan_pda_tiocmset(struct tty_struct *tty,
437 unsigned int set, unsigned int clear)
438{
439 struct usb_serial_port *port = tty->driver_data;
440 struct usb_serial *serial = port->serial;
441 int rc;
442 unsigned char status;
443
444 rc = keyspan_pda_get_modem_info(serial, &status);
445 if (rc < 0)
446 return rc;
447
448 if (set & TIOCM_RTS)
449 status |= BIT(2);
450 if (set & TIOCM_DTR)
451 status |= BIT(7);
452
453 if (clear & TIOCM_RTS)
454 status &= ~BIT(2);
455 if (clear & TIOCM_DTR)
456 status &= ~BIT(7);
457 rc = keyspan_pda_set_modem_info(serial, status);
458 return rc;
459}
460
461static int keyspan_pda_write_start(struct usb_serial_port *port)
462{
463 struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
464 unsigned long flags;
465 struct urb *urb;
466 int count;
467 int room;
468 int rc;
469
470 /*
471 * Guess how much room is left in the device's ring buffer. If our
472 * write will result in no room left, ask the device to give us an
473 * interrupt when the room available rises above a threshold but also
474 * query how much room is currently available (in case our guess was
475 * too conservative and the buffer is already empty when the
476 * unthrottle work is scheduled).
477 */
478
479 /*
480 * We might block because of:
481 * the TX urb is in-flight (wait until it completes)
482 * the device is full (wait until it says there is room)
483 */
484 spin_lock_irqsave(&port->lock, flags);
485
486 room = priv->tx_room;
487 count = kfifo_len(&port->write_fifo);
488
489 if (!test_bit(0, &port->write_urbs_free) || count == 0 || room == 0) {
490 spin_unlock_irqrestore(&port->lock, flags);
491 return 0;
492 }
493 __clear_bit(0, &port->write_urbs_free);
494
495 if (count > room)
496 count = room;
497 if (count > port->bulk_out_size)
498 count = port->bulk_out_size;
499
500 urb = port->write_urb;
501 count = kfifo_out(&port->write_fifo, urb->transfer_buffer, count);
502 urb->transfer_buffer_length = count;
503
504 port->tx_bytes += count;
505 priv->tx_room -= count;
506
507 spin_unlock_irqrestore(&port->lock, flags);
508
509 dev_dbg(&port->dev, "%s - count = %d, txroom = %d\n", __func__, count, room);
510
511 rc = usb_submit_urb(urb, GFP_ATOMIC);
512 if (rc) {
513 dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n");
514
515 spin_lock_irqsave(&port->lock, flags);
516 port->tx_bytes -= count;
517 priv->tx_room = max(priv->tx_room, room + count);
518 __set_bit(0, &port->write_urbs_free);
519 spin_unlock_irqrestore(&port->lock, flags);
520
521 return rc;
522 }
523
524 if (count == room)
525 schedule_work(&priv->unthrottle_work);
526
527 return count;
528}
529
530static void keyspan_pda_write_bulk_callback(struct urb *urb)
531{
532 struct usb_serial_port *port = urb->context;
533 unsigned long flags;
534
535 spin_lock_irqsave(&port->lock, flags);
536 port->tx_bytes -= urb->transfer_buffer_length;
537 __set_bit(0, &port->write_urbs_free);
538 spin_unlock_irqrestore(&port->lock, flags);
539
540 keyspan_pda_write_start(port);
541
542 usb_serial_port_softint(port);
543}
544
545static int keyspan_pda_write(struct tty_struct *tty, struct usb_serial_port *port,
546 const unsigned char *buf, int count)
547{
548 int rc;
549
550 dev_dbg(&port->dev, "%s - count = %d\n", __func__, count);
551
552 if (!count)
553 return 0;
554
555 count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);
556
557 rc = keyspan_pda_write_start(port);
558 if (rc)
559 return rc;
560
561 return count;
562}
563
564static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
565{
566 struct usb_serial *serial = port->serial;
567
568 if (on)
569 keyspan_pda_set_modem_info(serial, BIT(7) | BIT(2));
570 else
571 keyspan_pda_set_modem_info(serial, 0);
572}
573
574
575static int keyspan_pda_open(struct tty_struct *tty,
576 struct usb_serial_port *port)
577{
578 struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
579 int rc;
580
581 /* find out how much room is in the Tx ring */
582 rc = keyspan_pda_get_write_room(priv);
583 if (rc < 0)
584 return rc;
585
586 spin_lock_irq(&port->lock);
587 priv->tx_room = rc;
588 spin_unlock_irq(&port->lock);
589
590 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
591 if (rc) {
592 dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__);
593 return rc;
594 }
595
596 return 0;
597}
598
599static void keyspan_pda_close(struct usb_serial_port *port)
600{
601 struct keyspan_pda_private *priv = usb_get_serial_port_data(port);
602
603 /*
604 * Stop the interrupt URB first as its completion handler may submit
605 * the write URB.
606 */
607 usb_kill_urb(port->interrupt_in_urb);
608 usb_kill_urb(port->write_urb);
609
610 cancel_work_sync(&priv->unthrottle_work);
611
612 spin_lock_irq(&port->lock);
613 kfifo_reset(&port->write_fifo);
614 spin_unlock_irq(&port->lock);
615}
616
617/* download the firmware to a "fake" device (pre-renumeration) */
618static int keyspan_pda_fake_startup(struct usb_serial *serial)
619{
620 unsigned int vid = le16_to_cpu(serial->dev->descriptor.idVendor);
621 const char *fw_name;
622
623 /* download the firmware here ... */
624 ezusb_fx1_set_reset(serial->dev, 1);
625
626 switch (vid) {
627 case KEYSPAN_VENDOR_ID:
628 fw_name = "keyspan_pda/keyspan_pda.fw";
629 break;
630 case XIRCOM_VENDOR_ID:
631 case ENTREGA_VENDOR_ID:
632 fw_name = "keyspan_pda/xircom_pgs.fw";
633 break;
634 default:
635 dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
636 __func__);
637 return -ENODEV;
638 }
639
640 if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) {
641 dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
642 fw_name);
643 return -ENOENT;
644 }
645
646 /*
647 * After downloading firmware renumeration will occur in a moment and
648 * the new device will bind to the real driver.
649 */
650
651 /* We want this device to fail to have a driver assigned to it. */
652 return 1;
653}
654
655MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
656MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
657
658static int keyspan_pda_port_probe(struct usb_serial_port *port)
659{
660
661 struct keyspan_pda_private *priv;
662
663 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
664 if (!priv)
665 return -ENOMEM;
666
667 INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
668 priv->port = port;
669
670 usb_set_serial_port_data(port, priv);
671
672 return 0;
673}
674
675static void keyspan_pda_port_remove(struct usb_serial_port *port)
676{
677 struct keyspan_pda_private *priv;
678
679 priv = usb_get_serial_port_data(port);
680 kfree(priv);
681}
682
683static struct usb_serial_driver keyspan_pda_fake_device = {
684 .driver = {
685 .owner = THIS_MODULE,
686 .name = "keyspan_pda_pre",
687 },
688 .description = "Keyspan PDA - (prerenumeration)",
689 .id_table = id_table_fake,
690 .num_ports = 1,
691 .attach = keyspan_pda_fake_startup,
692};
693
694static struct usb_serial_driver keyspan_pda_device = {
695 .driver = {
696 .owner = THIS_MODULE,
697 .name = "keyspan_pda",
698 },
699 .description = "Keyspan PDA",
700 .id_table = id_table_std,
701 .num_ports = 1,
702 .num_bulk_out = 1,
703 .num_interrupt_in = 1,
704 .dtr_rts = keyspan_pda_dtr_rts,
705 .open = keyspan_pda_open,
706 .close = keyspan_pda_close,
707 .write = keyspan_pda_write,
708 .write_bulk_callback = keyspan_pda_write_bulk_callback,
709 .read_int_callback = keyspan_pda_rx_interrupt,
710 .throttle = keyspan_pda_rx_throttle,
711 .unthrottle = keyspan_pda_rx_unthrottle,
712 .set_termios = keyspan_pda_set_termios,
713 .break_ctl = keyspan_pda_break_ctl,
714 .tiocmget = keyspan_pda_tiocmget,
715 .tiocmset = keyspan_pda_tiocmset,
716 .port_probe = keyspan_pda_port_probe,
717 .port_remove = keyspan_pda_port_remove,
718};
719
720static struct usb_serial_driver * const serial_drivers[] = {
721 &keyspan_pda_device,
722 &keyspan_pda_fake_device,
723 NULL
724};
725
726module_usb_serial_driver(serial_drivers, id_table_combined);
727
728MODULE_AUTHOR(DRIVER_AUTHOR);
729MODULE_DESCRIPTION(DRIVER_DESC);
730MODULE_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");