2
* USB Keyspan PDA / Xircom / Entregra Converter driver
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>
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
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* the Free Software Foundation; either version 2 of the License, or
11
* (at your option) any later version.
13
* See Documentation/usb/usb-serial.txt for more information on using this
17
* cleaned up the Xircom support. Added ids for Entregra device which is
18
* the same as the Xircom device. Enabled the code to be compiled for
19
* either Xircom or Keyspan devices.
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* (08/11/2001) Cristian M. Craciunescu
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* support for Xircom PGSDB9
25
* switched from using spinlock to a semaphore, which fixes lots of
29
* Identify version on module load.
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* (11/01/2000) Adam J. Richter
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* usb_device_id table support
35
* Fixed bug with urb->dev not being set properly, now that the usb
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* Added locks for SMP safeness.
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* Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
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* (07/20/2000) borchers
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* - keyspan_pda_write no longer sleeps if it is called on interrupt time;
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* PPP and the line discipline with stty echo on can call write on
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* interrupt time and this would cause an oops if write slept
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* - if keyspan_pda_write is in an interrupt, it will not call
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* usb_control_msg (which sleeps) to query the room in the device
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* buffer, it simply uses the current room value it has
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* - if the urb is busy or if it is throttled keyspan_pda_write just
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* returns 0, rather than sleeping to wait for this to change; the
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* write_chan code in n_tty.c will sleep if needed before calling
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* keyspan_pda_write again
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* - if the device needs to be unthrottled, write now queues up the
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* call to usb_control_msg (which sleeps) to unthrottle the device
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* - the wakeups from keyspan_pda_write_bulk_callback are queued rather
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* than done directly from the callback to avoid the race in write_chan
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* - keyspan_pda_chars_in_buffer also indicates its buffer is full if the
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* urb status is -EINPROGRESS, meaning it cannot write at the moment
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* Added module_init and module_exit functions to handle the fact that this
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* driver is a loadable module now.
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* Split driver up into device specific pieces.
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/firmware.h>
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#include <linux/ihex.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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/* make a simple define to handle if we are compiling keyspan_pda or xircom support */
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#if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
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#if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
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* Version Information
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#define DRIVER_VERSION "v1.1"
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#define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
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#define DRIVER_DESC "USB Keyspan PDA Converter driver"
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struct keyspan_pda_private {
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struct work_struct wakeup_work;
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struct work_struct unthrottle_work;
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struct usb_serial *serial;
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struct usb_serial_port *port;
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#define KEYSPAN_VENDOR_ID 0x06cd
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#define KEYSPAN_PDA_FAKE_ID 0x0103
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#define KEYSPAN_PDA_ID 0x0104 /* no clue */
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/* For Xircom PGSDB9 and older Entregra version of the same device */
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#define XIRCOM_VENDOR_ID 0x085a
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#define XIRCOM_FAKE_ID 0x8027
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#define ENTREGRA_VENDOR_ID 0x1645
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#define ENTREGRA_FAKE_ID 0x8093
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static const struct usb_device_id id_table_combined[] = {
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
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{ USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
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{ USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
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{ } /* Terminating entry */
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MODULE_DEVICE_TABLE(usb, id_table_combined);
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static struct usb_driver keyspan_pda_driver = {
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.name = "keyspan_pda",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table_combined,
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static const struct usb_device_id id_table_std[] = {
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
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{ } /* Terminating entry */
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static const struct usb_device_id id_table_fake[] = {
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
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{ } /* Terminating entry */
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static const struct usb_device_id id_table_fake_xircom[] = {
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{ USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
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{ USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
170
static void keyspan_pda_wakeup_write(struct work_struct *work)
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struct keyspan_pda_private *priv =
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container_of(work, struct keyspan_pda_private, wakeup_work);
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struct usb_serial_port *port = priv->port;
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struct tty_struct *tty = tty_port_tty_get(&port->port);
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static void keyspan_pda_request_unthrottle(struct work_struct *work)
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struct keyspan_pda_private *priv =
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container_of(work, struct keyspan_pda_private, unthrottle_work);
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struct usb_serial *serial = priv->serial;
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dbg(" request_unthrottle");
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/* ask the device to tell us when the tx buffer becomes
190
sufficiently empty */
191
result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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7, /* request_unthrottle */
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USB_TYPE_VENDOR | USB_RECIP_INTERFACE
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16, /* value: threshold */
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dbg("%s - error %d from usb_control_msg",
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static void keyspan_pda_rx_interrupt(struct urb *urb)
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struct usb_serial_port *port = urb->context;
210
struct tty_struct *tty;
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unsigned char *data = urb->transfer_buffer;
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int status = urb->status;
214
struct keyspan_pda_private *priv;
215
priv = usb_get_serial_port_data(port);
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/* this urb is terminated, clean up */
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dbg("%s - urb shutting down with status: %d",
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dbg("%s - nonzero urb status received: %d",
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/* see if the message is data or a status interrupt */
237
tty = tty_port_tty_get(&port->port);
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/* rest of message is rx data */
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if (tty && urb->actual_length) {
240
tty_insert_flip_string(tty, data + 1,
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urb->actual_length - 1);
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tty_flip_buffer_push(tty);
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/* status interrupt */
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dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
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case 1: /* modemline change */
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case 2: /* tx unthrottle interrupt */
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priv->tx_throttled = 0;
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/* queue up a wakeup at scheduler time */
255
schedule_work(&priv->wakeup_work);
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retval = usb_submit_urb(urb, GFP_ATOMIC);
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"%s - usb_submit_urb failed with result %d",
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static void keyspan_pda_rx_throttle(struct tty_struct *tty)
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/* stop receiving characters. We just turn off the URB request, and
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let chars pile up in the device. If we're doing hardware
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flowcontrol, the device will signal the other end when its buffer
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fills up. If we're doing XON/XOFF, this would be a good time to
280
send an XOFF, although it might make sense to foist that off
281
upon the device too. */
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struct usb_serial_port *port = tty->driver_data;
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dbg("keyspan_pda_rx_throttle port %d", port->number);
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usb_kill_urb(port->interrupt_in_urb);
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static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
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struct usb_serial_port *port = tty->driver_data;
291
/* just restart the receive interrupt URB */
292
dbg("keyspan_pda_rx_unthrottle port %d", port->number);
293
port->interrupt_in_urb->dev = port->serial->dev;
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if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
295
dbg(" usb_submit_urb(read urb) failed");
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static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
336
bindex = 5; /* Default to 9600 */
340
/* rather than figure out how to sleep while waiting for this
341
to complete, I just use the "legacy" API. */
342
rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
345
| USB_RECIP_INTERFACE
346
| USB_DIR_OUT, /* type */
358
static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
360
struct usb_serial_port *port = tty->driver_data;
361
struct usb_serial *serial = port->serial;
365
if (break_state == -1)
366
value = 1; /* start break */
368
value = 0; /* clear break */
369
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
371
USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
372
value, 0, NULL, 0, 2000);
374
dbg("%s - error %d from usb_control_msg",
376
/* there is something funky about this.. the TCSBRK that 'cu' performs
377
ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
378
seconds apart, but it feels like the break sent isn't as long as it
383
static void keyspan_pda_set_termios(struct tty_struct *tty,
384
struct usb_serial_port *port, struct ktermios *old_termios)
386
struct usb_serial *serial = port->serial;
389
/* cflag specifies lots of stuff: number of stop bits, parity, number
390
of data bits, baud. What can the device actually handle?:
391
CSTOPB (1 stop bit or 2)
394
There is minimal hw support for parity (a PSW bit seems to hold the
395
parity of whatever is in the accumulator). The UART either deals
396
with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
397
1 special, stop). So, with firmware changes, we could do:
399
8N2: 11 bit, extra bit always (mark?)
400
8[EOMS]1: 11 bit, extra bit is parity
401
7[EOMS]1: 10 bit, b0/b7 is parity
402
7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
404
HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
407
For now, just do baud. */
409
speed = tty_get_baud_rate(tty);
410
speed = keyspan_pda_setbaud(serial, speed);
413
dbg("can't handle requested baud rate");
414
/* It hasn't changed so.. */
415
speed = tty_termios_baud_rate(old_termios);
417
/* Only speed can change so copy the old h/w parameters
418
then encode the new speed */
419
tty_termios_copy_hw(tty->termios, old_termios);
420
tty_encode_baud_rate(tty, speed, speed);
424
/* modem control pins: DTR and RTS are outputs and can be controlled.
425
DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
426
read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
428
static int keyspan_pda_get_modem_info(struct usb_serial *serial,
429
unsigned char *value)
434
data = kmalloc(1, GFP_KERNEL);
438
rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
440
USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
441
0, 0, data, 1, 2000);
450
static int keyspan_pda_set_modem_info(struct usb_serial *serial,
454
rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
456
USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
457
value, 0, NULL, 0, 2000);
461
static int keyspan_pda_tiocmget(struct tty_struct *tty)
463
struct usb_serial_port *port = tty->driver_data;
464
struct usb_serial *serial = port->serial;
466
unsigned char status;
469
rc = keyspan_pda_get_modem_info(serial, &status);
473
((status & (1<<7)) ? TIOCM_DTR : 0) |
474
((status & (1<<6)) ? TIOCM_CAR : 0) |
475
((status & (1<<5)) ? TIOCM_RNG : 0) |
476
((status & (1<<4)) ? TIOCM_DSR : 0) |
477
((status & (1<<3)) ? TIOCM_CTS : 0) |
478
((status & (1<<2)) ? TIOCM_RTS : 0);
482
static int keyspan_pda_tiocmset(struct tty_struct *tty,
483
unsigned int set, unsigned int clear)
485
struct usb_serial_port *port = tty->driver_data;
486
struct usb_serial *serial = port->serial;
488
unsigned char status;
490
rc = keyspan_pda_get_modem_info(serial, &status);
499
if (clear & TIOCM_RTS)
501
if (clear & TIOCM_DTR)
503
rc = keyspan_pda_set_modem_info(serial, status);
507
static int keyspan_pda_write(struct tty_struct *tty,
508
struct usb_serial_port *port, const unsigned char *buf, int count)
510
struct usb_serial *serial = port->serial;
511
int request_unthrottle = 0;
513
struct keyspan_pda_private *priv;
515
priv = usb_get_serial_port_data(port);
516
/* guess how much room is left in the device's ring buffer, and if we
517
want to send more than that, check first, updating our notion of
518
what is left. If our write will result in no room left, ask the
519
device to give us an interrupt when the room available rises above
520
a threshold, and hold off all writers (eventually, those using
521
select() or poll() too) until we receive that unthrottle interrupt.
522
Block if we can't write anything at all, otherwise write as much as
524
dbg("keyspan_pda_write(%d)", count);
526
dbg(" write request of 0 bytes");
530
/* we might block because of:
531
the TX urb is in-flight (wait until it completes)
532
the device is full (wait until it says there is room)
534
spin_lock_bh(&port->lock);
535
if (port->write_urb_busy || priv->tx_throttled) {
536
spin_unlock_bh(&port->lock);
539
port->write_urb_busy = 1;
540
spin_unlock_bh(&port->lock);
542
/* At this point the URB is in our control, nobody else can submit it
543
again (the only sudden transition was the one from EINPROGRESS to
544
finished). Also, the tx process is not throttled. So we are
547
count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
549
/* Check if we might overrun the Tx buffer. If so, ask the
550
device how much room it really has. This is done only on
551
scheduler time, since usb_control_msg() sleeps. */
552
if (count > priv->tx_room && !in_interrupt()) {
555
room = kmalloc(1, GFP_KERNEL);
561
rc = usb_control_msg(serial->dev,
562
usb_rcvctrlpipe(serial->dev, 0),
564
USB_TYPE_VENDOR | USB_RECIP_INTERFACE
566
0, /* value: 0 means "remaining room" */
572
dbg(" roomquery says %d", *room);
573
priv->tx_room = *room;
577
dbg(" roomquery failed");
581
dbg(" roomquery returned 0 bytes");
582
rc = -EIO; /* device didn't return any data */
586
if (count > priv->tx_room) {
587
/* we're about to completely fill the Tx buffer, so
588
we'll be throttled afterwards. */
589
count = priv->tx_room;
590
request_unthrottle = 1;
594
/* now transfer data */
595
memcpy(port->write_urb->transfer_buffer, buf, count);
596
/* send the data out the bulk port */
597
port->write_urb->transfer_buffer_length = count;
599
priv->tx_room -= count;
601
port->write_urb->dev = port->serial->dev;
602
rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
604
dbg(" usb_submit_urb(write bulk) failed");
608
/* There wasn't any room left, so we are throttled until
609
the buffer empties a bit */
610
request_unthrottle = 1;
613
if (request_unthrottle) {
614
priv->tx_throttled = 1; /* block writers */
615
schedule_work(&priv->unthrottle_work);
621
port->write_urb_busy = 0;
626
static void keyspan_pda_write_bulk_callback(struct urb *urb)
628
struct usb_serial_port *port = urb->context;
629
struct keyspan_pda_private *priv;
631
port->write_urb_busy = 0;
632
priv = usb_get_serial_port_data(port);
634
/* queue up a wakeup at scheduler time */
635
schedule_work(&priv->wakeup_work);
639
static int keyspan_pda_write_room(struct tty_struct *tty)
641
struct usb_serial_port *port = tty->driver_data;
642
struct keyspan_pda_private *priv;
643
priv = usb_get_serial_port_data(port);
644
/* used by n_tty.c for processing of tabs and such. Giving it our
645
conservative guess is probably good enough, but needs testing by
646
running a console through the device. */
647
return priv->tx_room;
651
static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
653
struct usb_serial_port *port = tty->driver_data;
654
struct keyspan_pda_private *priv;
658
priv = usb_get_serial_port_data(port);
660
/* when throttled, return at least WAKEUP_CHARS to tell select() (via
661
n_tty.c:normal_poll() ) that we're not writeable. */
663
spin_lock_irqsave(&port->lock, flags);
664
if (port->write_urb_busy || priv->tx_throttled)
666
spin_unlock_irqrestore(&port->lock, flags);
671
static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
673
struct usb_serial *serial = port->serial;
677
keyspan_pda_set_modem_info(serial, (1<<7) | (1<< 2));
679
keyspan_pda_set_modem_info(serial, 0);
684
static int keyspan_pda_open(struct tty_struct *tty,
685
struct usb_serial_port *port)
687
struct usb_serial *serial = port->serial;
690
struct keyspan_pda_private *priv;
692
/* find out how much room is in the Tx ring */
693
room = kmalloc(1, GFP_KERNEL);
697
rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
699
USB_TYPE_VENDOR | USB_RECIP_INTERFACE
707
dbg("%s - roomquery failed", __func__);
711
dbg("%s - roomquery returned 0 bytes", __func__);
715
priv = usb_get_serial_port_data(port);
716
priv->tx_room = *room;
717
priv->tx_throttled = *room ? 0 : 1;
719
/*Start reading from the device*/
720
port->interrupt_in_urb->dev = serial->dev;
721
rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
723
dbg("%s - usb_submit_urb(read int) failed", __func__);
730
static void keyspan_pda_close(struct usb_serial_port *port)
732
struct usb_serial *serial = port->serial;
735
/* shutdown our bulk reads and writes */
736
usb_kill_urb(port->write_urb);
737
usb_kill_urb(port->interrupt_in_urb);
742
/* download the firmware to a "fake" device (pre-renumeration) */
743
static int keyspan_pda_fake_startup(struct usb_serial *serial)
747
const struct ihex_binrec *record;
748
const struct firmware *fw;
750
/* download the firmware here ... */
751
response = ezusb_set_reset(serial, 1);
755
else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
756
fw_name = "keyspan_pda/keyspan_pda.fw";
759
else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
760
(le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
761
fw_name = "keyspan_pda/xircom_pgs.fw";
764
dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
768
if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) {
769
dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
773
record = (const struct ihex_binrec *)fw->data;
776
response = ezusb_writememory(serial, be32_to_cpu(record->addr),
777
(unsigned char *)record->data,
778
be16_to_cpu(record->len), 0xa0);
780
dev_err(&serial->dev->dev, "ezusb_writememory failed "
781
"for Keyspan PDA firmware (%d %04X %p %d)\n",
782
response, be32_to_cpu(record->addr),
783
record->data, be16_to_cpu(record->len));
786
record = ihex_next_binrec(record);
788
release_firmware(fw);
789
/* bring device out of reset. Renumeration will occur in a moment
790
and the new device will bind to the real driver */
791
response = ezusb_set_reset(serial, 0);
793
/* we want this device to fail to have a driver assigned to it. */
798
MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
801
MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
804
static int keyspan_pda_startup(struct usb_serial *serial)
807
struct keyspan_pda_private *priv;
809
/* allocate the private data structures for all ports. Well, for all
812
priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
814
return 1; /* error */
815
usb_set_serial_port_data(serial->port[0], priv);
816
init_waitqueue_head(&serial->port[0]->write_wait);
817
INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
818
INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
819
priv->serial = serial;
820
priv->port = serial->port[0];
824
static void keyspan_pda_release(struct usb_serial *serial)
828
kfree(usb_get_serial_port_data(serial->port[0]));
832
static struct usb_serial_driver keyspan_pda_fake_device = {
834
.owner = THIS_MODULE,
835
.name = "keyspan_pda_pre",
837
.description = "Keyspan PDA - (prerenumeration)",
838
.usb_driver = &keyspan_pda_driver,
839
.id_table = id_table_fake,
841
.attach = keyspan_pda_fake_startup,
846
static struct usb_serial_driver xircom_pgs_fake_device = {
848
.owner = THIS_MODULE,
849
.name = "xircom_no_firm",
851
.description = "Xircom / Entregra PGS - (prerenumeration)",
852
.usb_driver = &keyspan_pda_driver,
853
.id_table = id_table_fake_xircom,
855
.attach = keyspan_pda_fake_startup,
859
static struct usb_serial_driver keyspan_pda_device = {
861
.owner = THIS_MODULE,
862
.name = "keyspan_pda",
864
.description = "Keyspan PDA",
865
.usb_driver = &keyspan_pda_driver,
866
.id_table = id_table_std,
868
.dtr_rts = keyspan_pda_dtr_rts,
869
.open = keyspan_pda_open,
870
.close = keyspan_pda_close,
871
.write = keyspan_pda_write,
872
.write_room = keyspan_pda_write_room,
873
.write_bulk_callback = keyspan_pda_write_bulk_callback,
874
.read_int_callback = keyspan_pda_rx_interrupt,
875
.chars_in_buffer = keyspan_pda_chars_in_buffer,
876
.throttle = keyspan_pda_rx_throttle,
877
.unthrottle = keyspan_pda_rx_unthrottle,
878
.set_termios = keyspan_pda_set_termios,
879
.break_ctl = keyspan_pda_break_ctl,
880
.tiocmget = keyspan_pda_tiocmget,
881
.tiocmset = keyspan_pda_tiocmset,
882
.attach = keyspan_pda_startup,
883
.release = keyspan_pda_release,
887
static int __init keyspan_pda_init(void)
890
retval = usb_serial_register(&keyspan_pda_device);
892
goto failed_pda_register;
894
retval = usb_serial_register(&keyspan_pda_fake_device);
896
goto failed_pda_fake_register;
899
retval = usb_serial_register(&xircom_pgs_fake_device);
901
goto failed_xircom_register;
903
retval = usb_register(&keyspan_pda_driver);
905
goto failed_usb_register;
906
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
911
usb_serial_deregister(&xircom_pgs_fake_device);
912
failed_xircom_register:
915
usb_serial_deregister(&keyspan_pda_fake_device);
918
failed_pda_fake_register:
920
usb_serial_deregister(&keyspan_pda_device);
926
static void __exit keyspan_pda_exit(void)
928
usb_deregister(&keyspan_pda_driver);
929
usb_serial_deregister(&keyspan_pda_device);
931
usb_serial_deregister(&keyspan_pda_fake_device);
934
usb_serial_deregister(&xircom_pgs_fake_device);
939
module_init(keyspan_pda_init);
940
module_exit(keyspan_pda_exit);
942
MODULE_AUTHOR(DRIVER_AUTHOR);
943
MODULE_DESCRIPTION(DRIVER_DESC);
944
MODULE_LICENSE("GPL");
946
module_param(debug, bool, S_IRUGO | S_IWUSR);
947
MODULE_PARM_DESC(debug, "Debug enabled or not");