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