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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/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");