digi_acceleport.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:60k
- /*
- * Digi AccelePort USB-4 and USB-2 Serial Converters
- *
- * Copyright 2000 by Digi International
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's
- * usb-serial driver.
- *
- * Peter Berger (pberger@brimson.com)
- * Al Borchers (borchers@steinerpoint.com)
- *
- * (04/08/2001) gb
- * Identify version on module load.
- *
- * (11/01/2000) Adam J. Richter
- * usb_device_id table support
- *
- * (11/01/2000) pberger and borchers
- * -- Turned off the USB_DISABLE_SPD flag for write bulk urbs--it caused
- * USB 4 ports to hang on startup.
- * -- Serialized access to write urbs by adding the dp_write_urb_in_use
- * flag; otherwise, the driver caused SMP system hangs. Watching the
- * urb status is not sufficient.
- *
- * (10/05/2000) gkh
- * -- Fixed bug with urb->dev not being set properly, now that the usb
- * core needs it.
- *
- * (8/8/2000) pberger and borchers
- * -- Fixed close so that
- * - it can timeout while waiting for transmit idle, if needed;
- * - it ignores interrupts when flushing the port, turning
- * of modem signalling, and so on;
- * - it waits for the flush to really complete before returning.
- * -- Read_bulk_callback and write_bulk_callback check for a closed
- * port before using the tty struct or writing to the port.
- * -- The two changes above fix the oops caused by interrupted closes.
- * -- Added interruptible args to write_oob_command and set_modem_signals
- * and added a timeout arg to transmit_idle; needed for fixes to
- * close.
- * -- Added code for rx_throttle and rx_unthrottle so that input flow
- * control works.
- * -- Added code to set overrun, parity, framing, and break errors
- * (untested).
- * -- Set USB_DISABLE_SPD flag for write bulk urbs, so no 0 length
- * bulk writes are done. These hung the Digi USB device. The
- * 0 length bulk writes were a new feature of usb-uhci added in
- * the 2.4.0-test6 kernels.
- * -- Fixed mod inc race in open; do mod inc before sleeping to wait
- * for a close to finish.
- *
- * (7/31/2000) pberger
- * -- Fixed bugs with hardware handshaking:
- * - Added code to set/clear tty->hw_stopped in digi_read_oob_callback()
- * and digi_set_termios()
- * -- Added code in digi_set_termios() to
- * - add conditional in code handling transition from B0 to only
- * set RTS if RTS/CTS flow control is either not in use or if
- * the port is not currently throttled.
- * - handle turning off CRTSCTS.
- *
- * (7/30/2000) borchers
- * -- Added support for more than one Digi USB device by moving
- * globals to a private structure in the pointed to from the
- * usb_serial structure.
- * -- Moved the modem change and transmit idle wait queues into
- * the port private structure, so each port has its own queue
- * rather than sharing global queues.
- * -- Added support for break signals.
- *
- * (7/25/2000) pberger
- * -- Added USB-2 support. Note: the USB-2 supports 3 devices: two
- * serial and a parallel port. The parallel port is implemented
- * as a serial-to-parallel converter. That is, the driver actually
- * presents all three USB-2 interfaces as serial ports, but the third
- * one physically connects to a parallel device. Thus, for example,
- * one could plug a parallel printer into the USB-2's third port,
- * but from the kernel's (and userland's) point of view what's
- * actually out there is a serial device.
- *
- * (7/15/2000) borchers
- * -- Fixed race in open when a close is in progress.
- * -- Keep count of opens and dec the module use count for each
- * outstanding open when shutdown is called (on disconnect).
- * -- Fixed sanity checks in read_bulk_callback and write_bulk_callback
- * so pointers are checked before use.
- * -- Split read bulk callback into in band and out of band
- * callbacks, and no longer restart read chains if there is
- * a status error or a sanity error. This fixed the seg
- * faults and other errors we used to get on disconnect.
- * -- Port->active is once again a flag as usb-serial intended it
- * to be, not a count. Since it was only a char it would
- * have been limited to 256 simultaneous opens. Now the open
- * count is kept in the port private structure in dp_open_count.
- * -- Added code for modularization of the digi_acceleport driver.
- *
- * (6/27/2000) pberger and borchers
- * -- Zeroed out sync field in the wakeup_task before first use;
- * otherwise the uninitialized value might prevent the task from
- * being scheduled.
- * -- Initialized ret value to 0 in write_bulk_callback, otherwise
- * the uninitialized value could cause a spurious debugging message.
- *
- * (6/22/2000) pberger and borchers
- * -- Made cond_wait_... inline--apparently on SPARC the flags arg
- * to spin_lock_irqsave cannot be passed to another function
- * to call spin_unlock_irqrestore. Thanks to Pauline Middelink.
- * -- In digi_set_modem_signals the inner nested spin locks use just
- * spin_lock() rather than spin_lock_irqsave(). The old code
- * mistakenly left interrupts off. Thanks to Pauline Middelink.
- * -- copy_from_user (which can sleep) is no longer called while a
- * spinlock is held. We copy to a local buffer before getting
- * the spinlock--don't like the extra copy but the code is simpler.
- * -- Printk and dbg are no longer called while a spin lock is held.
- *
- * (6/4/2000) pberger and borchers
- * -- Replaced separate calls to spin_unlock_irqrestore and
- * interruptible_sleep_on_timeout with a new function
- * cond_wait_interruptible_timeout_irqrestore. This eliminates
- * the race condition where the wake up could happen after
- * the unlock and before the sleep.
- * -- Close now waits for output to drain.
- * -- Open waits until any close in progress is finished.
- * -- All out of band responses are now processed, not just the
- * first in a USB packet.
- * -- Fixed a bug that prevented the driver from working when the
- * first Digi port was not the first USB serial port--the driver
- * was mistakenly using the external USB serial port number to
- * try to index into its internal ports.
- * -- Fixed an SMP bug -- write_bulk_callback is called directly from
- * an interrupt, so spin_lock_irqsave/spin_unlock_irqrestore are
- * needed for locks outside write_bulk_callback that are also
- * acquired by write_bulk_callback to prevent deadlocks.
- * -- Fixed support for select() by making digi_chars_in_buffer()
- * return 256 when -EINPROGRESS is set, as the line discipline
- * code in n_tty.c expects.
- * -- Fixed an include file ordering problem that prevented debugging
- * messages from working.
- * -- Fixed an intermittent timeout problem that caused writes to
- * sometimes get stuck on some machines on some kernels. It turns
- * out in these circumstances write_chan() (in n_tty.c) was
- * asleep waiting for our wakeup call. Even though we call
- * wake_up_interruptible() in digi_write_bulk_callback(), there is
- * a race condition that could cause the wakeup to fail: if our
- * wake_up_interruptible() call occurs between the time that our
- * driver write routine finishes and write_chan() sets current->state
- * to TASK_INTERRUPTIBLE, the effect of our wakeup setting the state
- * to TASK_RUNNING will be lost and write_chan's subsequent call to
- * schedule() will never return (unless it catches a signal).
- * This race condition occurs because write_bulk_callback() (and thus
- * the wakeup) are called asynchonously from an interrupt, rather than
- * from the scheduler. We can avoid the race by calling the wakeup
- * from the scheduler queue and that's our fix: Now, at the end of
- * write_bulk_callback() we queue up a wakeup call on the scheduler
- * task queue. We still also invoke the wakeup directly since that
- * squeezes a bit more performance out of the driver, and any lost
- * race conditions will get cleaned up at the next scheduler run.
- *
- * NOTE: The problem also goes away if you comment out
- * the two code lines in write_chan() where current->state
- * is set to TASK_RUNNING just before calling driver.write() and to
- * TASK_INTERRUPTIBLE immediately afterwards. This is why the
- * problem did not show up with the 2.2 kernels -- they do not
- * include that code.
- *
- * (5/16/2000) pberger and borchers
- * -- Added timeouts to sleeps, to defend against lost wake ups.
- * -- Handle transition to/from B0 baud rate in digi_set_termios.
- *
- * (5/13/2000) pberger and borchers
- * -- All commands now sent on out of band port, using
- * digi_write_oob_command.
- * -- Get modem control signals whenever they change, support TIOCMGET/
- * SET/BIS/BIC ioctls.
- * -- digi_set_termios now supports parity, word size, stop bits, and
- * receive enable.
- * -- Cleaned up open and close, use digi_set_termios and
- * digi_write_oob_command to set port parameters.
- * -- Added digi_startup_device to start read chains on all ports.
- * -- Write buffer is only used when count==1, to be sure put_char can
- * write a char (unless the buffer is full).
- *
- * (5/10/2000) pberger and borchers
- * -- Added MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT calls on open/close.
- * -- Fixed problem where the first incoming character is lost on
- * port opens after the first close on that port. Now we keep
- * the read_urb chain open until shutdown.
- * -- Added more port conditioning calls in digi_open and digi_close.
- * -- Convert port->active to a use count so that we can deal with multiple
- * opens and closes properly.
- * -- Fixed some problems with the locking code.
- *
- * (5/3/2000) pberger and borchers
- * -- First alpha version of the driver--many known limitations and bugs.
- *
- *
- * Locking and SMP
- *
- * - Each port, including the out-of-band port, has a lock used to
- * serialize all access to the port's private structure.
- * - The port lock is also used to serialize all writes and access to
- * the port's URB.
- * - The port lock is also used for the port write_wait condition
- * variable. Holding the port lock will prevent a wake up on the
- * port's write_wait; this can be used with cond_wait_... to be sure
- * the wake up is not lost in a race when dropping the lock and
- * sleeping waiting for the wakeup.
- * - digi_write() does not sleep, since it is sometimes called on
- * interrupt time.
- * - digi_write_bulk_callback() and digi_read_bulk_callback() are
- * called directly from interrupts. Hence spin_lock_irqsave()
- * and spin_lock_irqrestore() are used in the rest of the code
- * for any locks they acquire.
- * - digi_write_bulk_callback() gets the port lock before waking up
- * processes sleeping on the port write_wait. It also schedules
- * wake ups so they happen from the scheduler, because the tty
- * system can miss wake ups from interrupts.
- * - All sleeps use a timeout of DIGI_RETRY_TIMEOUT before looping to
- * recheck the condition they are sleeping on. This is defensive,
- * in case a wake up is lost.
- * - Following Documentation/DocBook/kernel-locking.pdf no spin locks
- * are held when calling copy_to/from_user or printk.
- *
- * $Id: digi_acceleport.c,v 1.80.1.2 2000/11/02 05:45:08 root Exp $
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/signal.h>
- #include <linux/errno.h>
- #include <linux/poll.h>
- #include <linux/init.h>
- #include <linux/slab.h>
- #include <linux/fcntl.h>
- #include <linux/tty.h>
- #include <linux/tty_driver.h>
- #include <linux/tty_flip.h>
- #include <linux/module.h>
- #include <linux/spinlock.h>
- #include <linux/tqueue.h>
- #include <linux/usb.h>
- #ifdef CONFIG_USB_SERIAL_DEBUG
- static int debug = 1;
- #else
- static int debug;
- #endif
- #include "usb-serial.h"
- /* Defines */
- /*
- * Version Information
- */
- #define DRIVER_VERSION "v1.80.1.2"
- #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>"
- #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver"
- /* port output buffer length -- must be <= transfer buffer length - 2 */
- /* so we can be sure to send the full buffer in one urb */
- #define DIGI_OUT_BUF_SIZE 8
- /* port input buffer length -- must be >= transfer buffer length - 3 */
- /* so we can be sure to hold at least one full buffer from one urb */
- #define DIGI_IN_BUF_SIZE 64
- /* retry timeout while sleeping */
- #define DIGI_RETRY_TIMEOUT (HZ/10)
- /* timeout while waiting for tty output to drain in close */
- /* this delay is used twice in close, so the total delay could */
- /* be twice this value */
- #define DIGI_CLOSE_TIMEOUT (5*HZ)
- /* AccelePort USB Defines */
- /* ids */
- #define DIGI_VENDOR_ID 0x05c5
- #define DIGI_2_ID 0x0002 /* USB-2 */
- #define DIGI_4_ID 0x0004 /* USB-4 */
- /* commands
- * "INB": can be used on the in-band endpoint
- * "OOB": can be used on the out-of-band endpoint
- */
- #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */
- #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */
- #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */
- #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */
- #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */
- #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */
- #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */
- #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */
- #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */
- #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */
- #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */
- #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */
- #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */
- #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */
- #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */
- #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */
- #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */
- #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */
- #define DIGI_CMD_SEND_DATA 18 /* INB */
- #define DIGI_CMD_RECEIVE_DATA 19 /* INB */
- #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */
- #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */
- /* baud rates */
- #define DIGI_BAUD_50 0
- #define DIGI_BAUD_75 1
- #define DIGI_BAUD_110 2
- #define DIGI_BAUD_150 3
- #define DIGI_BAUD_200 4
- #define DIGI_BAUD_300 5
- #define DIGI_BAUD_600 6
- #define DIGI_BAUD_1200 7
- #define DIGI_BAUD_1800 8
- #define DIGI_BAUD_2400 9
- #define DIGI_BAUD_4800 10
- #define DIGI_BAUD_7200 11
- #define DIGI_BAUD_9600 12
- #define DIGI_BAUD_14400 13
- #define DIGI_BAUD_19200 14
- #define DIGI_BAUD_28800 15
- #define DIGI_BAUD_38400 16
- #define DIGI_BAUD_57600 17
- #define DIGI_BAUD_76800 18
- #define DIGI_BAUD_115200 19
- #define DIGI_BAUD_153600 20
- #define DIGI_BAUD_230400 21
- #define DIGI_BAUD_460800 22
- /* arguments */
- #define DIGI_WORD_SIZE_5 0
- #define DIGI_WORD_SIZE_6 1
- #define DIGI_WORD_SIZE_7 2
- #define DIGI_WORD_SIZE_8 3
- #define DIGI_PARITY_NONE 0
- #define DIGI_PARITY_ODD 1
- #define DIGI_PARITY_EVEN 2
- #define DIGI_PARITY_MARK 3
- #define DIGI_PARITY_SPACE 4
- #define DIGI_STOP_BITS_1 0
- #define DIGI_STOP_BITS_2 1
- #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1
- #define DIGI_INPUT_FLOW_CONTROL_RTS 2
- #define DIGI_INPUT_FLOW_CONTROL_DTR 4
- #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1
- #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2
- #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4
- #define DIGI_DTR_INACTIVE 0
- #define DIGI_DTR_ACTIVE 1
- #define DIGI_DTR_INPUT_FLOW_CONTROL 2
- #define DIGI_RTS_INACTIVE 0
- #define DIGI_RTS_ACTIVE 1
- #define DIGI_RTS_INPUT_FLOW_CONTROL 2
- #define DIGI_RTS_TOGGLE 3
- #define DIGI_FLUSH_TX 1
- #define DIGI_FLUSH_RX 2
- #define DIGI_RESUME_TX 4 /* clears xoff condition */
- #define DIGI_TRANSMIT_NOT_IDLE 0
- #define DIGI_TRANSMIT_IDLE 1
- #define DIGI_DISABLE 0
- #define DIGI_ENABLE 1
- #define DIGI_DEASSERT 0
- #define DIGI_ASSERT 1
- /* in band status codes */
- #define DIGI_OVERRUN_ERROR 4
- #define DIGI_PARITY_ERROR 8
- #define DIGI_FRAMING_ERROR 16
- #define DIGI_BREAK_ERROR 32
- /* out of band status */
- #define DIGI_NO_ERROR 0
- #define DIGI_BAD_FIRST_PARAMETER 1
- #define DIGI_BAD_SECOND_PARAMETER 2
- #define DIGI_INVALID_LINE 3
- #define DIGI_INVALID_OPCODE 4
- /* input signals */
- #define DIGI_READ_INPUT_SIGNALS_SLOT 1
- #define DIGI_READ_INPUT_SIGNALS_ERR 2
- #define DIGI_READ_INPUT_SIGNALS_BUSY 4
- #define DIGI_READ_INPUT_SIGNALS_PE 8
- #define DIGI_READ_INPUT_SIGNALS_CTS 16
- #define DIGI_READ_INPUT_SIGNALS_DSR 32
- #define DIGI_READ_INPUT_SIGNALS_RI 64
- #define DIGI_READ_INPUT_SIGNALS_DCD 128
- /* Structures */
- typedef struct digi_serial {
- spinlock_t ds_serial_lock;
- struct usb_serial_port *ds_oob_port; /* out-of-band port */
- int ds_oob_port_num; /* index of out-of-band port */
- int ds_device_started;
- } digi_serial_t;
- typedef struct digi_port {
- spinlock_t dp_port_lock;
- int dp_port_num;
- int dp_out_buf_len;
- unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE];
- int dp_in_buf_len;
- unsigned char dp_in_buf[DIGI_IN_BUF_SIZE];
- unsigned char dp_in_flag_buf[DIGI_IN_BUF_SIZE];
- int dp_write_urb_in_use;
- unsigned int dp_modem_signals;
- wait_queue_head_t dp_modem_change_wait;
- int dp_open_count; /* inc on open, dec on close */
- int dp_transmit_idle;
- wait_queue_head_t dp_transmit_idle_wait;
- int dp_throttled;
- int dp_throttle_restart;
- wait_queue_head_t dp_flush_wait;
- int dp_in_close; /* close in progress */
- wait_queue_head_t dp_close_wait; /* wait queue for close */
- struct tq_struct dp_wakeup_task;
- } digi_port_t;
- /* Local Function Declarations */
- static void digi_wakeup_write( struct usb_serial_port *port );
- static void digi_wakeup_write_lock( struct usb_serial_port *port );
- static int digi_write_oob_command( struct usb_serial_port *port,
- unsigned char *buf, int count, int interruptible );
- static int digi_write_inb_command( struct usb_serial_port *port,
- unsigned char *buf, int count, unsigned long timeout );
- static int digi_set_modem_signals( struct usb_serial_port *port,
- unsigned int modem_signals, int interruptible );
- static int digi_transmit_idle( struct usb_serial_port *port,
- unsigned long timeout );
- static void digi_rx_throttle (struct usb_serial_port *port);
- static void digi_rx_unthrottle (struct usb_serial_port *port);
- static void digi_set_termios( struct usb_serial_port *port,
- struct termios *old_termios );
- static void digi_break_ctl( struct usb_serial_port *port, int break_state );
- static int digi_ioctl( struct usb_serial_port *port, struct file *file,
- unsigned int cmd, unsigned long arg );
- static int digi_write( struct usb_serial_port *port, int from_user,
- const unsigned char *buf, int count );
- static void digi_write_bulk_callback( struct urb *urb );
- static int digi_write_room( struct usb_serial_port *port );
- static int digi_chars_in_buffer( struct usb_serial_port *port );
- static int digi_open( struct usb_serial_port *port, struct file *filp );
- static void digi_close( struct usb_serial_port *port, struct file *filp );
- static int digi_startup_device( struct usb_serial *serial );
- static int digi_startup( struct usb_serial *serial );
- static void digi_shutdown( struct usb_serial *serial );
- static void digi_read_bulk_callback( struct urb *urb );
- static int digi_read_inb_callback( struct urb *urb );
- static int digi_read_oob_callback( struct urb *urb );
- /* Statics */
- static __devinitdata struct usb_device_id id_table_combined [] = {
- { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
- { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
- { } /* Terminating entry */
- };
- static __devinitdata struct usb_device_id id_table_2 [] = {
- { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
- { } /* Terminating entry */
- };
- static __devinitdata struct usb_device_id id_table_4 [] = {
- { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE (usb, id_table_combined);
- /* device info needed for the Digi serial converter */
- static struct usb_serial_device_type digi_acceleport_2_device = {
- name: "Digi USB",
- id_table: id_table_2,
- needs_interrupt_in: DONT_CARE,
- needs_bulk_in: MUST_HAVE,
- needs_bulk_out: MUST_HAVE,
- num_interrupt_in: 0,
- num_bulk_in: 4,
- num_bulk_out: 4,
- num_ports: 3,
- open: digi_open,
- close: digi_close,
- write: digi_write,
- write_room: digi_write_room,
- write_bulk_callback: digi_write_bulk_callback,
- read_bulk_callback: digi_read_bulk_callback,
- chars_in_buffer: digi_chars_in_buffer,
- throttle: digi_rx_throttle,
- unthrottle: digi_rx_unthrottle,
- ioctl: digi_ioctl,
- set_termios: digi_set_termios,
- break_ctl: digi_break_ctl,
- startup: digi_startup,
- shutdown: digi_shutdown,
- };
- static struct usb_serial_device_type digi_acceleport_4_device = {
- name: "Digi USB",
- id_table: id_table_4,
- needs_interrupt_in: DONT_CARE,
- needs_bulk_in: MUST_HAVE,
- needs_bulk_out: MUST_HAVE,
- num_interrupt_in: 0,
- num_bulk_in: 5,
- num_bulk_out: 5,
- num_ports: 4,
- open: digi_open,
- close: digi_close,
- write: digi_write,
- write_room: digi_write_room,
- write_bulk_callback: digi_write_bulk_callback,
- read_bulk_callback: digi_read_bulk_callback,
- chars_in_buffer: digi_chars_in_buffer,
- throttle: digi_rx_throttle,
- unthrottle: digi_rx_unthrottle,
- ioctl: digi_ioctl,
- set_termios: digi_set_termios,
- break_ctl: digi_break_ctl,
- startup: digi_startup,
- shutdown: digi_shutdown,
- };
- /* Functions */
- /*
- * Cond Wait Interruptible Timeout Irqrestore
- *
- * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout
- * so that wake ups are not lost if they occur between the unlock
- * and the sleep. In other words, spin_lock_irqrestore and
- * interruptible_sleep_on_timeout are "atomic" with respect to
- * wake ups. This is used to implement condition variables.
- */
- static inline long cond_wait_interruptible_timeout_irqrestore(
- wait_queue_head_t *q, long timeout,
- spinlock_t *lock, unsigned long flags )
- {
- wait_queue_t wait;
- init_waitqueue_entry( &wait, current );
- set_current_state( TASK_INTERRUPTIBLE );
- add_wait_queue( q, &wait );
- spin_unlock_irqrestore( lock, flags );
- timeout = schedule_timeout(timeout);
- set_current_state( TASK_RUNNING );
- remove_wait_queue( q, &wait );
- return( timeout );
- }
- /*
- * Digi Wakeup Write
- *
- * Wake up port, line discipline, and tty processes sleeping
- * on writes.
- */
- static void digi_wakeup_write_lock( struct usb_serial_port *port )
- {
- unsigned long flags;
- digi_port_t *priv = (digi_port_t *)(port->private);
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- digi_wakeup_write( port );
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- MOD_DEC_USE_COUNT;
- }
- static void digi_wakeup_write( struct usb_serial_port *port )
- {
- struct tty_struct *tty = port->tty;
- /* wake up port processes */
- wake_up_interruptible( &port->write_wait );
- /* wake up line discipline */
- if( (tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
- && tty->ldisc.write_wakeup )
- (tty->ldisc.write_wakeup)(tty);
- /* wake up other tty processes */
- wake_up_interruptible( &tty->write_wait );
- /* For 2.2.16 backport -- wake_up_interruptible( &tty->poll_wait ); */
- }
- /*
- * Digi Write OOB Command
- *
- * Write commands on the out of band port. Commands are 4
- * bytes each, multiple commands can be sent at once, and
- * no command will be split across USB packets. Returns 0
- * if successful, -EINTR if interrupted while sleeping and
- * the interruptible flag is true, or a negative error
- * returned by usb_submit_urb.
- */
- static int digi_write_oob_command( struct usb_serial_port *port,
- unsigned char *buf, int count, int interruptible )
- {
- int ret = 0;
- int len;
- struct usb_serial_port *oob_port = (struct usb_serial_port *)((digi_serial_t *)port->serial->private)->ds_oob_port;
- digi_port_t *oob_priv = (digi_port_t *)oob_port->private;
- unsigned long flags = 0;
- dbg( "digi_write_oob_command: TOP: port=%d, count=%d", oob_priv->dp_port_num, count );
- spin_lock_irqsave( &oob_priv->dp_port_lock, flags );
- while( count > 0 ) {
- while( oob_port->write_urb->status == -EINPROGRESS
- || oob_priv->dp_write_urb_in_use ) {
- cond_wait_interruptible_timeout_irqrestore(
- &oob_port->write_wait, DIGI_RETRY_TIMEOUT,
- &oob_priv->dp_port_lock, flags );
- if( interruptible && signal_pending(current) ) {
- return( -EINTR );
- }
- spin_lock_irqsave( &oob_priv->dp_port_lock, flags );
- }
- /* len must be a multiple of 4, so commands are not split */
- len = min(count, oob_port->bulk_out_size );
- if( len > 4 )
- len &= ~3;
- memcpy( oob_port->write_urb->transfer_buffer, buf, len );
- oob_port->write_urb->transfer_buffer_length = len;
- oob_port->write_urb->dev = port->serial->dev;
- if( (ret=usb_submit_urb(oob_port->write_urb)) == 0 ) {
- oob_priv->dp_write_urb_in_use = 1;
- count -= len;
- buf += len;
- }
- }
- spin_unlock_irqrestore( &oob_priv->dp_port_lock, flags );
- if( ret ) {
- err( __FUNCTION__ ": usb_submit_urb failed, ret=%d",
- ret );
- }
- return( ret );
- }
- /*
- * Digi Write In Band Command
- *
- * Write commands on the given port. Commands are 4
- * bytes each, multiple commands can be sent at once, and
- * no command will be split across USB packets. If timeout
- * is non-zero, write in band command will return after
- * waiting unsuccessfully for the URB status to clear for
- * timeout ticks. Returns 0 if successful, or a negative
- * error returned by digi_write.
- */
- static int digi_write_inb_command( struct usb_serial_port *port,
- unsigned char *buf, int count, unsigned long timeout )
- {
- int ret = 0;
- int len;
- digi_port_t *priv = (digi_port_t *)(port->private);
- unsigned char *data = port->write_urb->transfer_buffer;
- unsigned long flags = 0;
- dbg( "digi_write_inb_command: TOP: port=%d, count=%d", priv->dp_port_num,
- count );
- if( timeout )
- timeout += jiffies;
- else
- timeout = ULONG_MAX;
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- while( count > 0 && ret == 0 ) {
- while( (port->write_urb->status == -EINPROGRESS
- || priv->dp_write_urb_in_use) && jiffies < timeout ) {
- cond_wait_interruptible_timeout_irqrestore(
- &port->write_wait, DIGI_RETRY_TIMEOUT,
- &priv->dp_port_lock, flags );
- if( signal_pending(current) ) {
- return( -EINTR );
- }
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- }
- /* len must be a multiple of 4 and small enough to */
- /* guarantee the write will send buffered data first, */
- /* so commands are in order with data and not split */
- len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len );
- if( len > 4 )
- len &= ~3;
- /* write any buffered data first */
- if( priv->dp_out_buf_len > 0 ) {
- data[0] = DIGI_CMD_SEND_DATA;
- data[1] = priv->dp_out_buf_len;
- memcpy( data+2, priv->dp_out_buf,
- priv->dp_out_buf_len );
- memcpy( data+2+priv->dp_out_buf_len, buf, len );
- port->write_urb->transfer_buffer_length
- = priv->dp_out_buf_len+2+len;
- } else {
- memcpy( data, buf, len );
- port->write_urb->transfer_buffer_length = len;
- }
- port->write_urb->dev = port->serial->dev;
- if( (ret=usb_submit_urb(port->write_urb)) == 0 ) {
- priv->dp_write_urb_in_use = 1;
- priv->dp_out_buf_len = 0;
- count -= len;
- buf += len;
- }
- }
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- if( ret ) {
- err( __FUNCTION__ ": usb_submit_urb failed, ret=%d, port=%d",
- ret, priv->dp_port_num );
- }
- return( ret );
- }
- /*
- * Digi Set Modem Signals
- *
- * Sets or clears DTR and RTS on the port, according to the
- * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags
- * for the modem_signals argument. Returns 0 if successful,
- * -EINTR if interrupted while sleeping, or a non-zero error
- * returned by usb_submit_urb.
- */
- static int digi_set_modem_signals( struct usb_serial_port *port,
- unsigned int modem_signals, int interruptible )
- {
- int ret;
- digi_port_t *port_priv = (digi_port_t *)port->private;
- struct usb_serial_port *oob_port = (struct usb_serial_port *)((digi_serial_t *)port->serial->private)->ds_oob_port;
- digi_port_t *oob_priv = (digi_port_t *)oob_port->private;
- unsigned char *data = oob_port->write_urb->transfer_buffer;
- unsigned long flags = 0;
- dbg( "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x",
- port_priv->dp_port_num, modem_signals );
- spin_lock_irqsave( &oob_priv->dp_port_lock, flags );
- spin_lock( &port_priv->dp_port_lock );
- while( oob_port->write_urb->status == -EINPROGRESS
- || oob_priv->dp_write_urb_in_use ) {
- spin_unlock( &port_priv->dp_port_lock );
- cond_wait_interruptible_timeout_irqrestore(
- &oob_port->write_wait, DIGI_RETRY_TIMEOUT,
- &oob_priv->dp_port_lock, flags );
- if( interruptible && signal_pending(current) ) {
- return( -EINTR );
- }
- spin_lock_irqsave( &oob_priv->dp_port_lock, flags );
- spin_lock( &port_priv->dp_port_lock );
- }
- data[0] = DIGI_CMD_SET_DTR_SIGNAL;
- data[1] = port_priv->dp_port_num;
- data[2] = (modem_signals&TIOCM_DTR) ?
- DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE;
- data[3] = 0;
- data[4] = DIGI_CMD_SET_RTS_SIGNAL;
- data[5] = port_priv->dp_port_num;
- data[6] = (modem_signals&TIOCM_RTS) ?
- DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE;
- data[7] = 0;
- oob_port->write_urb->transfer_buffer_length = 8;
- oob_port->write_urb->dev = port->serial->dev;
- if( (ret=usb_submit_urb(oob_port->write_urb)) == 0 ) {
- oob_priv->dp_write_urb_in_use = 1;
- port_priv->dp_modem_signals =
- (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS))
- | (modem_signals&(TIOCM_DTR|TIOCM_RTS));
- }
- spin_unlock( &port_priv->dp_port_lock );
- spin_unlock_irqrestore( &oob_priv->dp_port_lock, flags );
- if( ret ) {
- err( __FUNCTION__ ": usb_submit_urb failed, ret=%d",
- ret );
- }
- return( ret );
- }
- /*
- * Digi Transmit Idle
- *
- * Digi transmit idle waits, up to timeout ticks, for the transmitter
- * to go idle. It returns 0 if successful or a negative error.
- *
- * There are race conditions here if more than one process is calling
- * digi_transmit_idle on the same port at the same time. However, this
- * is only called from close, and only one process can be in close on a
- * port at a time, so its ok.
- */
- static int digi_transmit_idle( struct usb_serial_port *port,
- unsigned long timeout )
- {
- int ret;
- unsigned char buf[2];
- digi_port_t *priv = (digi_port_t *)(port->private);
- unsigned long flags = 0;
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- priv->dp_transmit_idle = 0;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- buf[0] = DIGI_CMD_TRANSMIT_IDLE;
- buf[1] = 0;
- timeout += jiffies;
- if( (ret=digi_write_inb_command( port, buf, 2, timeout-jiffies )) != 0 )
- return( ret );
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- while( jiffies < timeout && !priv->dp_transmit_idle ) {
- cond_wait_interruptible_timeout_irqrestore(
- &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT,
- &priv->dp_port_lock, flags );
- if( signal_pending(current) ) {
- return( -EINTR );
- }
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- }
- priv->dp_transmit_idle = 0;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return( 0 );
- }
- static void digi_rx_throttle( struct usb_serial_port *port )
- {
- unsigned long flags;
- digi_port_t *priv = (digi_port_t *)(port->private);
- dbg( "digi_rx_throttle: TOP: port=%d", priv->dp_port_num );
- /* stop receiving characters by not resubmitting the read urb */
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- priv->dp_throttled = 1;
- priv->dp_throttle_restart = 0;
- priv->dp_in_buf_len = 0;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- }
- static void digi_rx_unthrottle( struct usb_serial_port *port )
- {
- int ret = 0;
- int len;
- unsigned long flags;
- digi_port_t *priv = (digi_port_t *)(port->private);
- struct tty_struct *tty = port->tty;
- dbg( "digi_rx_unthrottle: TOP: port=%d", priv->dp_port_num );
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- /* send any buffered chars from throttle time on to tty subsystem */
- len = min(priv->dp_in_buf_len, TTY_FLIPBUF_SIZE - tty->flip.count );
- if( len > 0 ) {
- memcpy( tty->flip.char_buf_ptr, priv->dp_in_buf, len );
- memcpy( tty->flip.flag_buf_ptr, priv->dp_in_flag_buf, len );
- tty->flip.char_buf_ptr += len;
- tty->flip.flag_buf_ptr += len;
- tty->flip.count += len;
- tty_flip_buffer_push( tty );
- }
- /* restart read chain */
- if( priv->dp_throttle_restart ) {
- port->read_urb->dev = port->serial->dev;
- ret = usb_submit_urb( port->read_urb );
- }
- /* turn throttle off */
- priv->dp_throttled = 0;
- priv->dp_in_buf_len = 0;
- priv->dp_throttle_restart = 0;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- if( ret ) {
- err( __FUNCTION__ ": usb_submit_urb failed, ret=%d, port=%d",
- ret, priv->dp_port_num );
- }
- }
- static void digi_set_termios( struct usb_serial_port *port,
- struct termios *old_termios )
- {
- digi_port_t *priv = (digi_port_t *)(port->private);
- unsigned int iflag = port->tty->termios->c_iflag;
- unsigned int cflag = port->tty->termios->c_cflag;
- unsigned int old_iflag = old_termios->c_iflag;
- unsigned int old_cflag = old_termios->c_cflag;
- unsigned char buf[32];
- unsigned int modem_signals;
- int arg,ret;
- int i = 0;
- dbg( "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x", priv->dp_port_num, iflag, old_iflag, cflag, old_cflag );
- /* set baud rate */
- if( (cflag&CBAUD) != (old_cflag&CBAUD) ) {
- arg = -1;
- /* reassert DTR and (maybe) RTS on transition from B0 */
- if( (old_cflag&CBAUD) == B0 ) {
- /* don't set RTS if using hardware flow control */
- /* and throttling input */
- modem_signals = TIOCM_DTR;
- if( !(port->tty->termios->c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &port->tty->flags) ) {
- modem_signals |= TIOCM_RTS;
- }
- digi_set_modem_signals( port, modem_signals, 1 );
- }
- switch( (cflag&CBAUD) ) {
- /* drop DTR and RTS on transition to B0 */
- case B0: digi_set_modem_signals( port, 0, 1 ); break;
- case B50: arg = DIGI_BAUD_50; break;
- case B75: arg = DIGI_BAUD_75; break;
- case B110: arg = DIGI_BAUD_110; break;
- case B150: arg = DIGI_BAUD_150; break;
- case B200: arg = DIGI_BAUD_200; break;
- case B300: arg = DIGI_BAUD_300; break;
- case B600: arg = DIGI_BAUD_600; break;
- case B1200: arg = DIGI_BAUD_1200; break;
- case B1800: arg = DIGI_BAUD_1800; break;
- case B2400: arg = DIGI_BAUD_2400; break;
- case B4800: arg = DIGI_BAUD_4800; break;
- case B9600: arg = DIGI_BAUD_9600; break;
- case B19200: arg = DIGI_BAUD_19200; break;
- case B38400: arg = DIGI_BAUD_38400; break;
- case B57600: arg = DIGI_BAUD_57600; break;
- case B115200: arg = DIGI_BAUD_115200; break;
- case B230400: arg = DIGI_BAUD_230400; break;
- case B460800: arg = DIGI_BAUD_460800; break;
- default:
- dbg( "digi_set_termios: can't handle baud rate 0x%x",
- (cflag&CBAUD) );
- break;
- }
- if( arg != -1 ) {
- buf[i++] = DIGI_CMD_SET_BAUD_RATE;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- }
- /* set parity */
- if( (cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD)) ) {
- if( (cflag&PARENB) ) {
- if( (cflag&PARODD) )
- arg = DIGI_PARITY_ODD;
- else
- arg = DIGI_PARITY_EVEN;
- } else {
- arg = DIGI_PARITY_NONE;
- }
- buf[i++] = DIGI_CMD_SET_PARITY;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- /* set word size */
- if( (cflag&CSIZE) != (old_cflag&CSIZE) ) {
- arg = -1;
- switch( (cflag&CSIZE) ) {
- case CS5: arg = DIGI_WORD_SIZE_5; break;
- case CS6: arg = DIGI_WORD_SIZE_6; break;
- case CS7: arg = DIGI_WORD_SIZE_7; break;
- case CS8: arg = DIGI_WORD_SIZE_8; break;
- default:
- dbg( "digi_set_termios: can't handle word size %d",
- (cflag&CSIZE) );
- break;
- }
- if( arg != -1 ) {
- buf[i++] = DIGI_CMD_SET_WORD_SIZE;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- }
- /* set stop bits */
- if( (cflag&CSTOPB) != (old_cflag&CSTOPB) ) {
- if( (cflag&CSTOPB) )
- arg = DIGI_STOP_BITS_2;
- else
- arg = DIGI_STOP_BITS_1;
- buf[i++] = DIGI_CMD_SET_STOP_BITS;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- /* set input flow control */
- if( (iflag&IXOFF) != (old_iflag&IXOFF)
- || (cflag&CRTSCTS) != (old_cflag&CRTSCTS) ) {
- arg = 0;
- if( (iflag&IXOFF) )
- arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
- else
- arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
- if( (cflag&CRTSCTS) ) {
- arg |= DIGI_INPUT_FLOW_CONTROL_RTS;
- /* On USB-4 it is necessary to assert RTS prior */
- /* to selecting RTS input flow control. */
- buf[i++] = DIGI_CMD_SET_RTS_SIGNAL;
- buf[i++] = priv->dp_port_num;
- buf[i++] = DIGI_RTS_ACTIVE;
- buf[i++] = 0;
- } else {
- arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS;
- }
- buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- /* set output flow control */
- if( (iflag&IXON) != (old_iflag&IXON)
- || (cflag&CRTSCTS) != (old_cflag&CRTSCTS) ) {
- arg = 0;
- if( (iflag&IXON) )
- arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
- else
- arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
- if( (cflag&CRTSCTS) ) {
- arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS;
- } else {
- arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS;
- port->tty->hw_stopped = 0;
- }
- buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- /* set receive enable/disable */
- if( (cflag&CREAD) != (old_cflag&CREAD) ) {
- if( (cflag&CREAD) )
- arg = DIGI_ENABLE;
- else
- arg = DIGI_DISABLE;
- buf[i++] = DIGI_CMD_RECEIVE_ENABLE;
- buf[i++] = priv->dp_port_num;
- buf[i++] = arg;
- buf[i++] = 0;
- }
- if( (ret=digi_write_oob_command( port, buf, i, 1 )) != 0 )
- dbg( "digi_set_termios: write oob failed, ret=%d", ret );
- }
- static void digi_break_ctl( struct usb_serial_port *port, int break_state )
- {
- unsigned char buf[4];
- buf[0] = DIGI_CMD_BREAK_CONTROL;
- buf[1] = 2; /* length */
- buf[2] = break_state ? 1 : 0;
- buf[3] = 0; /* pad */
- digi_write_inb_command( port, buf, 4, 0 );
- }
- static int digi_ioctl( struct usb_serial_port *port, struct file *file,
- unsigned int cmd, unsigned long arg )
- {
- digi_port_t *priv = (digi_port_t *)(port->private);
- unsigned int val;
- unsigned long flags = 0;
- dbg( "digi_ioctl: TOP: port=%d, cmd=0x%x", priv->dp_port_num, cmd );
- switch (cmd) {
- case TIOCMGET:
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- val = priv->dp_modem_signals;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- if( copy_to_user((unsigned int *)arg, &val, sizeof(int)) )
- return( -EFAULT );
- return( 0 );
- case TIOCMSET:
- case TIOCMBIS:
- case TIOCMBIC:
- if( copy_from_user(&val, (unsigned int *)arg, sizeof(int)) )
- return( -EFAULT );
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- if( cmd == TIOCMBIS )
- val = priv->dp_modem_signals | val;
- else if( cmd == TIOCMBIC )
- val = priv->dp_modem_signals & ~val;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return( digi_set_modem_signals( port, val, 1 ) );
- case TIOCMIWAIT:
- /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
- /* TODO */
- return( 0 );
- case TIOCGICOUNT:
- /* return count of modemline transitions */
- /* TODO */
- return 0;
- }
- return( -ENOIOCTLCMD );
- }
- static int digi_write( struct usb_serial_port *port, int from_user,
- const unsigned char *buf, int count )
- {
- int ret,data_len,new_len;
- digi_port_t *priv = (digi_port_t *)(port->private);
- unsigned char *data = port->write_urb->transfer_buffer;
- unsigned char user_buf[64]; /* 64 bytes is max USB bulk packet */
- unsigned long flags = 0;
- dbg( "digi_write: TOP: port=%d, count=%d, from_user=%d, in_interrupt=%d",
- priv->dp_port_num, count, from_user, in_interrupt() );
- /* copy user data (which can sleep) before getting spin lock */
- count = min( count, port->bulk_out_size-2 );
- count = min( 64, count);
- if( from_user && copy_from_user( user_buf, buf, count ) ) {
- return( -EFAULT );
- }
- /* be sure only one write proceeds at a time */
- /* there are races on the port private buffer */
- /* and races to check write_urb->status */
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- /* wait for urb status clear to submit another urb */
- if( port->write_urb->status == -EINPROGRESS
- || priv->dp_write_urb_in_use ) {
- /* buffer data if count is 1 (probably put_char) if possible */
- if( count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE ) {
- priv->dp_out_buf[priv->dp_out_buf_len++]
- = *(from_user ? user_buf : buf);
- new_len = 1;
- } else {
- new_len = 0;
- }
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return( new_len );
- }
- /* allow space for any buffered data and for new data, up to */
- /* transfer buffer size - 2 (for command and length bytes) */
- new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len);
- data_len = new_len + priv->dp_out_buf_len;
- if( data_len == 0 ) {
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return( 0 );
- }
- port->write_urb->transfer_buffer_length = data_len+2;
- port->write_urb->dev = port->serial->dev;
- *data++ = DIGI_CMD_SEND_DATA;
- *data++ = data_len;
- /* copy in buffered data first */
- memcpy( data, priv->dp_out_buf, priv->dp_out_buf_len );
- data += priv->dp_out_buf_len;
- /* copy in new data */
- memcpy( data, from_user ? user_buf : buf, new_len );
- if( (ret=usb_submit_urb(port->write_urb)) == 0 ) {
- priv->dp_write_urb_in_use = 1;
- ret = new_len;
- priv->dp_out_buf_len = 0;
- }
- /* return length of new data written, or error */
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- if( ret < 0 ) {
- err( __FUNCTION__ ": usb_submit_urb failed, ret=%d, port=%d",
- ret, priv->dp_port_num );
- }
- dbg( "digi_write: returning %d", ret );
- return( ret );
- }
- static void digi_write_bulk_callback( struct urb *urb )
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- struct usb_serial *serial;
- digi_port_t *priv;
- int ret = 0;
- dbg( "digi_write_bulk_callback: TOP, urb->status=%d", urb->status );
- /* port and serial sanity check */
- if( port == NULL || (priv=(digi_port_t *)(port->private)) == NULL ) {
- err( __FUNCTION__ ": port or port->private is NULL, status=%d",
- urb->status );
- return;
- }
- serial = port->serial;
- if( serial == NULL || serial->private == NULL ) {
- err( __FUNCTION__ ": serial or serial->private is NULL, status=%d", urb->status );
- return;
- }
- /* handle oob callback */
- if( priv->dp_port_num
- == ((digi_serial_t *)(serial->private))->ds_oob_port_num ) {
- dbg( "digi_write_bulk_callback: oob callback" );
- spin_lock( &priv->dp_port_lock );
- priv->dp_write_urb_in_use = 0;
- wake_up_interruptible( &port->write_wait );
- spin_unlock( &priv->dp_port_lock );
- return;
- }
- /* further sanity checks */
- if( port_paranoia_check( port, __FUNCTION__ )
- || serial_paranoia_check( serial, __FUNCTION__ ) )
- return;
- /* try to send any buffered data on this port, if it is open */
- spin_lock( &priv->dp_port_lock );
- priv->dp_write_urb_in_use = 0;
- if( priv->dp_open_count && port->write_urb->status != -EINPROGRESS
- && priv->dp_out_buf_len > 0 ) {
- *((unsigned char *)(port->write_urb->transfer_buffer))
- = (unsigned char)DIGI_CMD_SEND_DATA;
- *((unsigned char *)(port->write_urb->transfer_buffer)+1)
- = (unsigned char)priv->dp_out_buf_len;
- port->write_urb->transfer_buffer_length
- = priv->dp_out_buf_len+2;
- port->write_urb->dev = serial->dev;
- memcpy( port->write_urb->transfer_buffer+2, priv->dp_out_buf,
- priv->dp_out_buf_len );
- if( (ret=usb_submit_urb(port->write_urb)) == 0 ) {
- priv->dp_write_urb_in_use = 1;
- priv->dp_out_buf_len = 0;
- }
- }
- /* wake up processes sleeping on writes immediately */
- digi_wakeup_write( port );
- /* also queue up a wakeup at scheduler time, in case we */
- /* lost the race in write_chan(). */
- MOD_INC_USE_COUNT;
- if (schedule_task(&priv->dp_wakeup_task) == 0)
- MOD_DEC_USE_COUNT;
- spin_unlock( &priv->dp_port_lock );
- if( ret ) {
- err( __FUNCTION__ ": usb_submit_urb failed, ret=%d, port=%d",
- ret, priv->dp_port_num );
- }
- }
- static int digi_write_room( struct usb_serial_port *port )
- {
- int room;
- digi_port_t *priv = (digi_port_t *)(port->private);
- unsigned long flags = 0;
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- if( port->write_urb->status == -EINPROGRESS
- || priv->dp_write_urb_in_use )
- room = 0;
- else
- room = port->bulk_out_size - 2 - priv->dp_out_buf_len;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- dbg( "digi_write_room: port=%d, room=%d", priv->dp_port_num, room );
- return( room );
- }
- static int digi_chars_in_buffer( struct usb_serial_port *port )
- {
- digi_port_t *priv = (digi_port_t *)(port->private);
- if( port->write_urb->status == -EINPROGRESS
- || priv->dp_write_urb_in_use ) {
- dbg( "digi_chars_in_buffer: port=%d, chars=%d", priv->dp_port_num, port->bulk_out_size - 2 );
- /* return( port->bulk_out_size - 2 ); */
- return( 256 );
- } else {
- dbg( "digi_chars_in_buffer: port=%d, chars=%d", priv->dp_port_num, priv->dp_out_buf_len );
- return( priv->dp_out_buf_len );
- }
- }
- static int digi_open( struct usb_serial_port *port, struct file *filp )
- {
- int ret;
- unsigned char buf[32];
- digi_port_t *priv = (digi_port_t *)(port->private);
- struct termios not_termios;
- unsigned long flags = 0;
- dbg( "digi_open: TOP: port=%d, active=%d, open_count=%d", priv->dp_port_num, port->active, priv->dp_open_count );
- /* be sure the device is started up */
- if( digi_startup_device( port->serial ) != 0 )
- return( -ENXIO );
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- /* don't wait on a close in progress for non-blocking opens */
- if( priv->dp_in_close && (filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0 ) {
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return( -EAGAIN );
- }
- /* inc module use count before sleeping to wait for closes */
- ++priv->dp_open_count;
- MOD_INC_USE_COUNT;
- /* wait for a close in progress to finish */
- while( priv->dp_in_close ) {
- cond_wait_interruptible_timeout_irqrestore(
- &priv->dp_close_wait, DIGI_RETRY_TIMEOUT,
- &priv->dp_port_lock, flags );
- if( signal_pending(current) ) {
- --priv->dp_open_count;
- MOD_DEC_USE_COUNT;
- return( -EINTR );
- }
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- }
- /* if port is already open, just return */
- /* be sure exactly one open proceeds */
- if( port->active ) {
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return( 0 );
- }
- /* first open, mark port as active */
- port->active = 1;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
-
- /* read modem signals automatically whenever they change */
- buf[0] = DIGI_CMD_READ_INPUT_SIGNALS;
- buf[1] = priv->dp_port_num;
- buf[2] = DIGI_ENABLE;
- buf[3] = 0;
- /* flush fifos */
- buf[4] = DIGI_CMD_IFLUSH_FIFO;
- buf[5] = priv->dp_port_num;
- buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
- buf[7] = 0;
- if( (ret=digi_write_oob_command( port, buf, 8, 1 )) != 0 )
- dbg( "digi_open: write oob failed, ret=%d", ret );
- /* set termios settings */
- not_termios.c_cflag = ~port->tty->termios->c_cflag;
- not_termios.c_iflag = ~port->tty->termios->c_iflag;
- digi_set_termios( port, ¬_termios );
- /* set DTR and RTS */
- digi_set_modem_signals( port, TIOCM_DTR|TIOCM_RTS, 1 );
- return( 0 );
- }
- static void digi_close( struct usb_serial_port *port, struct file *filp )
- {
- int ret;
- unsigned char buf[32];
- struct tty_struct *tty = port->tty;
- digi_port_t *priv = (digi_port_t *)port->private;
- unsigned long flags = 0;
- dbg( "digi_close: TOP: port=%d, active=%d, open_count=%d", priv->dp_port_num, port->active, priv->dp_open_count );
- /* do cleanup only after final close on this port */
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- if( priv->dp_open_count > 1 ) {
- --priv->dp_open_count;
- MOD_DEC_USE_COUNT;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return;
- } else if( priv->dp_open_count <= 0 ) {
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- return;
- }
- priv->dp_in_close = 1;
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- /* tell line discipline to process only XON/XOFF */
- tty->closing = 1;
- /* wait for output to drain */
- if( (filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0 ) {
- tty_wait_until_sent( tty, DIGI_CLOSE_TIMEOUT );
- }
- /* flush driver and line discipline buffers */
- if( tty->driver.flush_buffer )
- tty->driver.flush_buffer( tty );
- if( tty->ldisc.flush_buffer )
- tty->ldisc.flush_buffer( tty );
- if (port->serial->dev) {
- /* wait for transmit idle */
- if( (filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0 ) {
- digi_transmit_idle( port, DIGI_CLOSE_TIMEOUT );
- }
- /* drop DTR and RTS */
- digi_set_modem_signals( port, 0, 0 );
- /* disable input flow control */
- buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
- buf[1] = priv->dp_port_num;
- buf[2] = DIGI_DISABLE;
- buf[3] = 0;
- /* disable output flow control */
- buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
- buf[5] = priv->dp_port_num;
- buf[6] = DIGI_DISABLE;
- buf[7] = 0;
- /* disable reading modem signals automatically */
- buf[8] = DIGI_CMD_READ_INPUT_SIGNALS;
- buf[9] = priv->dp_port_num;
- buf[10] = DIGI_DISABLE;
- buf[11] = 0;
- /* disable receive */
- buf[12] = DIGI_CMD_RECEIVE_ENABLE;
- buf[13] = priv->dp_port_num;
- buf[14] = DIGI_DISABLE;
- buf[15] = 0;
- /* flush fifos */
- buf[16] = DIGI_CMD_IFLUSH_FIFO;
- buf[17] = priv->dp_port_num;
- buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
- buf[19] = 0;
- if( (ret=digi_write_oob_command( port, buf, 20, 0 )) != 0 )
- dbg( "digi_close: write oob failed, ret=%d", ret );
- /* wait for final commands on oob port to complete */
- interruptible_sleep_on_timeout( &priv->dp_flush_wait,
- DIGI_CLOSE_TIMEOUT );
- /* shutdown any outstanding bulk writes */
- usb_unlink_urb (port->write_urb);
- }
- tty->closing = 0;
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- port->active = 0;
- priv->dp_write_urb_in_use = 0;
- priv->dp_in_close = 0;
- --priv->dp_open_count;
- MOD_DEC_USE_COUNT;
- wake_up_interruptible( &priv->dp_close_wait );
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- dbg( "digi_close: done" );
- }
- /*
- * Digi Startup Device
- *
- * Starts reads on all ports. Must be called AFTER startup, with
- * urbs initialized. Returns 0 if successful, non-zero error otherwise.
- */
- static int digi_startup_device( struct usb_serial *serial )
- {
- int i,ret = 0;
- digi_serial_t *serial_priv = (digi_serial_t *)serial->private;
- struct usb_serial_port *port;
- /* be sure this happens exactly once */
- spin_lock( &serial_priv->ds_serial_lock );
- if( serial_priv->ds_device_started ) {
- spin_unlock( &serial_priv->ds_serial_lock );
- return( 0 );
- }
- serial_priv->ds_device_started = 1;
- spin_unlock( &serial_priv->ds_serial_lock );
- /* start reading from each bulk in endpoint for the device */
- /* set USB_DISABLE_SPD flag for write bulk urbs */
- for( i=0; i<serial->type->num_ports+1; i++ ) {
- port = &serial->port[i];
- port->write_urb->dev = port->serial->dev;
- if( (ret=usb_submit_urb(port->read_urb)) != 0 ) {
- err(
- __FUNCTION__ ": usb_submit_urb failed, ret=%d, port=%d",
- ret, i );
- break;
- }
- }
- return( ret );
- }
- static int digi_startup( struct usb_serial *serial )
- {
- int i;
- digi_port_t *priv;
- digi_serial_t *serial_priv;
- dbg( "digi_startup: TOP" );
- /* allocate the private data structures for all ports */
- /* number of regular ports + 1 for the out-of-band port */
- for( i=0; i<serial->type->num_ports+1; i++ ) {
- serial->port[i].active = 0;
- /* allocate port private structure */
- priv = serial->port[i].private =
- (digi_port_t *)kmalloc( sizeof(digi_port_t),
- GFP_KERNEL );
- if( priv == (digi_port_t *)0 ) {
- while( --i >= 0 )
- kfree( serial->port[i].private );
- return( 1 ); /* error */
- }
- /* initialize port private structure */
- spin_lock_init( &priv->dp_port_lock );
- priv->dp_port_num = i;
- priv->dp_out_buf_len = 0;
- priv->dp_in_buf_len = 0;
- priv->dp_write_urb_in_use = 0;
- priv->dp_modem_signals = 0;
- init_waitqueue_head( &priv->dp_modem_change_wait );
- priv->dp_open_count = 0;
- priv->dp_transmit_idle = 0;
- init_waitqueue_head( &priv->dp_transmit_idle_wait );
- priv->dp_throttled = 0;
- priv->dp_throttle_restart = 0;
- init_waitqueue_head( &priv->dp_flush_wait );
- priv->dp_in_close = 0;
- init_waitqueue_head( &priv->dp_close_wait );
- INIT_LIST_HEAD(&priv->dp_wakeup_task.list);
- priv->dp_wakeup_task.sync = 0;
- priv->dp_wakeup_task.routine = (void *)digi_wakeup_write_lock;
- priv->dp_wakeup_task.data = (void *)(&serial->port[i]);
- /* initialize write wait queue for this port */
- init_waitqueue_head( &serial->port[i].write_wait );
- }
- /* allocate serial private structure */
- serial_priv = serial->private =
- (digi_serial_t *)kmalloc( sizeof(digi_serial_t),
- GFP_KERNEL );
- if( serial_priv == (digi_serial_t *)0 ) {
- for( i=0; i<serial->type->num_ports+1; i++ )
- kfree( serial->port[i].private );
- return( 1 ); /* error */
- }
- /* initialize serial private structure */
- spin_lock_init( &serial_priv->ds_serial_lock );
- serial_priv->ds_oob_port_num = serial->type->num_ports;
- serial_priv->ds_oob_port = &serial->port[serial_priv->ds_oob_port_num];
- serial_priv->ds_device_started = 0;
- return( 0 );
- }
- static void digi_shutdown( struct usb_serial *serial )
- {
- int i;
- digi_port_t *priv;
- unsigned long flags;
- dbg( "digi_shutdown: TOP, in_interrupt()=%d", in_interrupt() );
- /* stop reads and writes on all ports */
- for( i=0; i<serial->type->num_ports+1; i++ ) {
- usb_unlink_urb( serial->port[i].read_urb );
- usb_unlink_urb( serial->port[i].write_urb );
- }
- /* dec module use count */
- for( i=0; i<serial->type->num_ports; i++ ) {
- priv = serial->port[i].private;
- spin_lock_irqsave( &priv->dp_port_lock, flags );
- while( priv->dp_open_count > 0 ) {
- MOD_DEC_USE_COUNT;
- --priv->dp_open_count;
- }
- spin_unlock_irqrestore( &priv->dp_port_lock, flags );
- }
- /* free the private data structures for all ports */
- /* number of regular ports + 1 for the out-of-band port */
- for( i=0; i<serial->type->num_ports+1; i++ )
- kfree( serial->port[i].private );
- kfree( serial->private );
- }
- static void digi_read_bulk_callback( struct urb *urb )
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- digi_port_t *priv;
- int ret;
- dbg( "digi_read_bulk_callback: TOP" );
- /* port sanity check, do not resubmit if port is not valid */
- if( port == NULL || (priv=(digi_port_t *)(port->private)) == NULL ) {
- err( __FUNCTION__ ": port or port->private is NULL, status=%d",
- urb->status );
- return;
- }
- if( port->serial == NULL
- || serial_paranoia_check( port->serial, __FUNCTION__ )
- || port->serial->private == NULL ) {
- err( __FUNCTION__ ": serial is bad or serial->private is NULL, status=%d", urb->status );
- return;
- }
- /* do not resubmit urb if it has any status error */
- if( urb->status ) {
- err( __FUNCTION__ ": nonzero read bulk status: status=%d, port=%d", urb->status, priv->dp_port_num );
- return;
- }
- /* handle oob or inb callback, do not resubmit if error */
- if( priv->dp_port_num
- == ((digi_serial_t *)(port->serial->private))->ds_oob_port_num ) {
- if( digi_read_oob_callback( urb ) != 0 )
- return;
- } else {
- if( digi_read_inb_callback( urb ) != 0 )
- return;
- }
- /* continue read */
- urb->dev = port->serial->dev;
- if( (ret=usb_submit_urb(urb)) != 0 ) {
- err( __FUNCTION__ ": failed resubmitting urb, ret=%d, port=%d",
- ret, priv->dp_port_num );
- }
- }
- /*
- * Digi Read INB Callback
- *
- * Digi Read INB Callback handles reads on the in band ports, sending
- * the data on to the tty subsystem. When called we know port and
- * port->private are not NULL and port->serial has been validated.
- * It returns 0 if successful, 1 if successful but the port is
- * throttled, and -1 if the sanity checks failed.
- */
- static int digi_read_inb_callback( struct urb *urb )
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- struct tty_struct *tty = port->tty;
- digi_port_t *priv = (digi_port_t *)(port->private);
- int opcode = ((unsigned char *)urb->transfer_buffer)[0];
- int len = ((unsigned char *)urb->transfer_buffer)[1];
- int status = ((unsigned char *)urb->transfer_buffer)[2];
- unsigned char *data = ((unsigned char *)urb->transfer_buffer)+3;
- int flag,throttled;
- /* sanity check */
- if( port_paranoia_check( port, __FUNCTION__ ) )
- return( -1 );
- /* do not process callbacks on closed ports */
- /* but do continue the read chain */
- if( priv->dp_open_count == 0 )
- return( 0 );
- /* short/multiple packet check */
- if( urb->actual_length != len + 2 ) {
- err( __FUNCTION__ ": INCOMPLETE OR MULTIPLE PACKET, urb->status=%d, port=%d, opcode=%d, len=%d, actual_length=%d, status=%d", urb->status, priv->dp_port_num, opcode, len, urb->actual_length, status );
- return( -1 );
- }
- spin_lock( &priv->dp_port_lock );
- /* check for throttle; if set, do not resubmit read urb */
- /* indicate the read chain needs to be restarted on unthrottle */
- throttled = priv->dp_throttled;
- if( throttled )
- priv->dp_throttle_restart = 1;
- /* receive data */
- if( opcode == DIGI_CMD_RECEIVE_DATA ) {
- /* get flag from status */
- flag = 0;
- /* overrun is special, not associated with a char */
- if( status & DIGI_OVERRUN_ERROR ) {
- tty_insert_flip_char( tty, 0, TTY_OVERRUN );
- }
- /* break takes precedence over parity, */
- /* which takes precedence over framing errors */
- if( status & DIGI_BREAK_ERROR ) {
- flag = TTY_BREAK;
- } else if( status & DIGI_PARITY_ERROR ) {
- flag = TTY_PARITY;
- } else if( status & DIGI_FRAMING_ERROR ) {
- flag = TTY_FRAME;
- }
- /* data length is len-1 (one byte of len is status) */
- --len;
- if( throttled ) {
- len = min( len,
- DIGI_IN_BUF_SIZE - priv->dp_in_buf_len );
- if( len > 0 ) {
- memcpy( priv->dp_in_buf + priv->dp_in_buf_len,
- data, len );
- memset( priv->dp_in_flag_buf
- + priv->dp_in_buf_len, flag, len );
- priv->dp_in_buf_len += len;
- }
- } else {
- len = min( len, TTY_FLIPBUF_SIZE - tty->flip.count );
- if( len > 0 ) {
- memcpy( tty->flip.char_buf_ptr, data, len );
- memset( tty->flip.flag_buf_ptr, flag, len );
- tty->flip.char_buf_ptr += len;
- tty->flip.flag_buf_ptr += len;
- tty->flip.count += len;
- tty_flip_buffer_push( tty );
- }
- }
- }
- spin_unlock( &priv->dp_port_lock );
- if( opcode == DIGI_CMD_RECEIVE_DISABLE ) {
- dbg( __FUNCTION__ ": got RECEIVE_DISABLE" );
- } else if( opcode != DIGI_CMD_RECEIVE_DATA ) {
- dbg( __FUNCTION__ ": unknown opcode: %d", opcode );
- }
- return( throttled ? 1 : 0 );
- }
- /*
- * Digi Read OOB Callback
- *
- * Digi Read OOB Callback handles reads on the out of band port.
- * When called we know port and port->private are not NULL and
- * the port->serial is valid. It returns 0 if successful, and
- * -1 if the sanity checks failed.
- */
- static int digi_read_oob_callback( struct urb *urb )
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- struct usb_serial *serial = port->serial;
- digi_port_t *priv = (digi_port_t *)(port->private);
- int opcode, line, status, val;
- int i;
- dbg( "digi_read_oob_callback: port=%d, len=%d", priv->dp_port_num,
- urb->actual_length );
- /* handle each oob command */
- for( i=0; i<urb->actual_length-3; ) {
- opcode = ((unsigned char *)urb->transfer_buffer)[i++];
- line = ((unsigned char *)urb->transfer_buffer)[i++];
- status = ((unsigned char *)urb->transfer_buffer)[i++];
- val = ((unsigned char *)urb->transfer_buffer)[i++];
- dbg( "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d",
- opcode, line, status, val );
- if( status != 0 || line >= serial->type->num_ports )
- continue;
- port = &serial->port[line];
- if( port_paranoia_check( port, __FUNCTION__ )
- || (priv=port->private) == NULL )
- return( -1 );
- if( opcode == DIGI_CMD_READ_INPUT_SIGNALS ) {
- spin_lock( &priv->dp_port_lock );
- /* convert from digi flags to termiox flags */
- if( val & DIGI_READ_INPUT_SIGNALS_CTS ) {
- priv->dp_modem_signals |= TIOCM_CTS;
- /* port must be open to use tty struct */
- if( priv->dp_open_count
- && port->tty->termios->c_cflag & CRTSCTS ) {
- port->tty->hw_stopped = 0;
- digi_wakeup_write( port );
- }
- } else {
- priv->dp_modem_signals &= ~TIOCM_CTS;
- /* port must be open to use tty struct */
- if( priv->dp_open_count
- && port->tty->termios->c_cflag & CRTSCTS ) {
- port->tty->hw_stopped = 1;
- }
- }
- if( val & DIGI_READ_INPUT_SIGNALS_DSR )
- priv->dp_modem_signals |= TIOCM_DSR;
- else
- priv->dp_modem_signals &= ~TIOCM_DSR;
- if( val & DIGI_READ_INPUT_SIGNALS_RI )
- priv->dp_modem_signals |= TIOCM_RI;
- else
- priv->dp_modem_signals &= ~TIOCM_RI;
- if( val & DIGI_READ_INPUT_SIGNALS_DCD )
- priv->dp_modem_signals |= TIOCM_CD;
- else
- priv->dp_modem_signals &= ~TIOCM_CD;
- wake_up_interruptible( &priv->dp_modem_change_wait );
- spin_unlock( &priv->dp_port_lock );
- } else if( opcode == DIGI_CMD_TRANSMIT_IDLE ) {
- spin_lock( &priv->dp_port_lock );
- priv->dp_transmit_idle = 1;
- wake_up_interruptible( &priv->dp_transmit_idle_wait );
- spin_unlock( &priv->dp_port_lock );
- } else if( opcode == DIGI_CMD_IFLUSH_FIFO ) {
- wake_up_interruptible( &priv->dp_flush_wait );
- }
- }
- return( 0 );
- }
- static int __init digi_init (void)
- {
- usb_serial_register (&digi_acceleport_2_device);
- usb_serial_register (&digi_acceleport_4_device);
- info(DRIVER_VERSION ":" DRIVER_DESC);
- return 0;
- }
- static void __exit digi_exit (void)
- {
- usb_serial_deregister (&digi_acceleport_2_device);
- usb_serial_deregister (&digi_acceleport_4_device);
- }
- module_init(digi_init);
- module_exit(digi_exit);
- MODULE_AUTHOR( DRIVER_AUTHOR );
- MODULE_DESCRIPTION( DRIVER_DESC );
- MODULE_LICENSE("GPL");
- MODULE_PARM(debug, "i");
- MODULE_PARM_DESC(debug, "Debug enabled or not");