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