![Uwe Zeisberger](/assets/img/avatar_default.png)
Signed-off-by: Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
710 lines
18 KiB
C
710 lines
18 KiB
C
/*
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Option Card (PCMCIA to) USB to Serial Driver
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Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
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This driver is free software; you can redistribute it and/or modify
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it under the terms of Version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
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History:
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2005-05-19 v0.1 Initial version, based on incomplete docs
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and analysis of misbehavior with the standard driver
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2005-05-20 v0.2 Extended the input buffer to avoid losing
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random 64-byte chunks of data
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2005-05-21 v0.3 implemented chars_in_buffer()
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turned on low_latency
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simplified the code somewhat
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2005-05-24 v0.4 option_write() sometimes deadlocked under heavy load
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removed some dead code
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added sponsor notice
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coding style clean-up
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2005-06-20 v0.4.1 add missing braces :-/
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killed end-of-line whitespace
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2005-07-15 v0.4.2 rename WLAN product to FUSION, add FUSION2
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2005-09-10 v0.4.3 added HUAWEI E600 card and Audiovox AirCard
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2005-09-20 v0.4.4 increased recv buffer size: the card sometimes
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wants to send >2000 bytes.
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Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
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*/
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#define DRIVER_VERSION "v0.4"
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#define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
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#define DRIVER_DESC "Option Card (PC-Card to) USB to Serial Driver"
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/jiffies.h>
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#include <linux/errno.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include "usb-serial.h"
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/* Function prototypes */
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static int option_open(struct usb_serial_port *port, struct file *filp);
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static void option_close(struct usb_serial_port *port, struct file *filp);
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static int option_startup(struct usb_serial *serial);
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static void option_shutdown(struct usb_serial *serial);
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static void option_rx_throttle(struct usb_serial_port *port);
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static void option_rx_unthrottle(struct usb_serial_port *port);
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static int option_write_room(struct usb_serial_port *port);
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static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
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static int option_write(struct usb_serial_port *port,
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const unsigned char *buf, int count);
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static int option_chars_in_buffer(struct usb_serial_port *port);
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static int option_ioctl(struct usb_serial_port *port, struct file *file,
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unsigned int cmd, unsigned long arg);
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static void option_set_termios(struct usb_serial_port *port,
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struct termios *old);
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static void option_break_ctl(struct usb_serial_port *port, int break_state);
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static int option_tiocmget(struct usb_serial_port *port, struct file *file);
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static int option_tiocmset(struct usb_serial_port *port, struct file *file,
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unsigned int set, unsigned int clear);
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static int option_send_setup(struct usb_serial_port *port);
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/* Vendor and product IDs */
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#define OPTION_VENDOR_ID 0x0AF0
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#define HUAWEI_VENDOR_ID 0x12D1
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#define AUDIOVOX_VENDOR_ID 0x0F3D
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#define OPTION_PRODUCT_OLD 0x5000
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#define OPTION_PRODUCT_FUSION 0x6000
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#define OPTION_PRODUCT_FUSION2 0x6300
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#define HUAWEI_PRODUCT_E600 0x1001
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#define AUDIOVOX_PRODUCT_AIRCARD 0x0112
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static struct usb_device_id option_ids[] = {
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{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
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{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
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{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
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{ USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
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{ USB_DEVICE(AUDIOVOX_VENDOR_ID, AUDIOVOX_PRODUCT_AIRCARD) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, option_ids);
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static struct usb_driver option_driver = {
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.name = "option",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = option_ids,
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.no_dynamic_id = 1,
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};
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/* The card has three separate interfaces, which the serial driver
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* recognizes separately, thus num_port=1.
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*/
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static struct usb_serial_driver option_3port_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "option",
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},
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.description = "Option 3G data card",
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.id_table = option_ids,
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.num_interrupt_in = NUM_DONT_CARE,
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.num_bulk_in = NUM_DONT_CARE,
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.num_bulk_out = NUM_DONT_CARE,
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.num_ports = 1, /* 3, but the card reports its ports separately */
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.open = option_open,
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.close = option_close,
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.write = option_write,
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.write_room = option_write_room,
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.chars_in_buffer = option_chars_in_buffer,
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.throttle = option_rx_throttle,
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.unthrottle = option_rx_unthrottle,
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.ioctl = option_ioctl,
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.set_termios = option_set_termios,
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.break_ctl = option_break_ctl,
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.tiocmget = option_tiocmget,
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.tiocmset = option_tiocmset,
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.attach = option_startup,
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.shutdown = option_shutdown,
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.read_int_callback = option_instat_callback,
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};
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#ifdef CONFIG_USB_DEBUG
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static int debug;
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#else
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#define debug 0
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#endif
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/* per port private data */
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#define N_IN_URB 4
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#define N_OUT_URB 1
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#define IN_BUFLEN 4096
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#define OUT_BUFLEN 128
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struct option_port_private {
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/* Input endpoints and buffer for this port */
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struct urb *in_urbs[N_IN_URB];
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char in_buffer[N_IN_URB][IN_BUFLEN];
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/* Output endpoints and buffer for this port */
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struct urb *out_urbs[N_OUT_URB];
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char out_buffer[N_OUT_URB][OUT_BUFLEN];
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/* Settings for the port */
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int rts_state; /* Handshaking pins (outputs) */
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int dtr_state;
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int cts_state; /* Handshaking pins (inputs) */
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int dsr_state;
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int dcd_state;
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int ri_state;
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unsigned long tx_start_time[N_OUT_URB];
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};
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/* Functions used by new usb-serial code. */
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static int __init option_init(void)
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{
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int retval;
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retval = usb_serial_register(&option_3port_device);
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if (retval)
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goto failed_3port_device_register;
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retval = usb_register(&option_driver);
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if (retval)
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goto failed_driver_register;
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info(DRIVER_DESC ": " DRIVER_VERSION);
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return 0;
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failed_driver_register:
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usb_serial_deregister (&option_3port_device);
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failed_3port_device_register:
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return retval;
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}
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static void __exit option_exit(void)
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{
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usb_deregister (&option_driver);
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usb_serial_deregister (&option_3port_device);
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}
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module_init(option_init);
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module_exit(option_exit);
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static void option_rx_throttle(struct usb_serial_port *port)
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{
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dbg("%s", __FUNCTION__);
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}
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static void option_rx_unthrottle(struct usb_serial_port *port)
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{
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dbg("%s", __FUNCTION__);
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}
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static void option_break_ctl(struct usb_serial_port *port, int break_state)
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{
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/* Unfortunately, I don't know how to send a break */
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dbg("%s", __FUNCTION__);
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}
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static void option_set_termios(struct usb_serial_port *port,
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struct termios *old_termios)
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{
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dbg("%s", __FUNCTION__);
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option_send_setup(port);
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}
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static int option_tiocmget(struct usb_serial_port *port, struct file *file)
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{
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unsigned int value;
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struct option_port_private *portdata;
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portdata = usb_get_serial_port_data(port);
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value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
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((portdata->dtr_state) ? TIOCM_DTR : 0) |
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((portdata->cts_state) ? TIOCM_CTS : 0) |
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((portdata->dsr_state) ? TIOCM_DSR : 0) |
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((portdata->dcd_state) ? TIOCM_CAR : 0) |
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((portdata->ri_state) ? TIOCM_RNG : 0);
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return value;
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}
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static int option_tiocmset(struct usb_serial_port *port, struct file *file,
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unsigned int set, unsigned int clear)
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{
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struct option_port_private *portdata;
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portdata = usb_get_serial_port_data(port);
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if (set & TIOCM_RTS)
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portdata->rts_state = 1;
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if (set & TIOCM_DTR)
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portdata->dtr_state = 1;
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if (clear & TIOCM_RTS)
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portdata->rts_state = 0;
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if (clear & TIOCM_DTR)
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portdata->dtr_state = 0;
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return option_send_setup(port);
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}
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static int option_ioctl(struct usb_serial_port *port, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return -ENOIOCTLCMD;
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}
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/* Write */
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static int option_write(struct usb_serial_port *port,
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const unsigned char *buf, int count)
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{
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struct option_port_private *portdata;
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int i;
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int left, todo;
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struct urb *this_urb = NULL; /* spurious */
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int err;
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portdata = usb_get_serial_port_data(port);
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dbg("%s: write (%d chars)", __FUNCTION__, count);
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i = 0;
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left = count;
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for (i=0; left > 0 && i < N_OUT_URB; i++) {
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todo = left;
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if (todo > OUT_BUFLEN)
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todo = OUT_BUFLEN;
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this_urb = portdata->out_urbs[i];
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if (this_urb->status == -EINPROGRESS) {
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if (time_before(jiffies,
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portdata->tx_start_time[i] + 10 * HZ))
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continue;
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usb_unlink_urb(this_urb);
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continue;
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}
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if (this_urb->status != 0)
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dbg("usb_write %p failed (err=%d)",
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this_urb, this_urb->status);
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dbg("%s: endpoint %d buf %d", __FUNCTION__,
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usb_pipeendpoint(this_urb->pipe), i);
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/* send the data */
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memcpy (this_urb->transfer_buffer, buf, todo);
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this_urb->transfer_buffer_length = todo;
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this_urb->dev = port->serial->dev;
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err = usb_submit_urb(this_urb, GFP_ATOMIC);
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if (err) {
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dbg("usb_submit_urb %p (write bulk) failed "
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"(%d, has %d)", this_urb,
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err, this_urb->status);
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continue;
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}
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portdata->tx_start_time[i] = jiffies;
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buf += todo;
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left -= todo;
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}
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count -= left;
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dbg("%s: wrote (did %d)", __FUNCTION__, count);
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return count;
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}
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static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
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{
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int err;
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int endpoint;
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struct usb_serial_port *port;
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struct tty_struct *tty;
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unsigned char *data = urb->transfer_buffer;
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dbg("%s: %p", __FUNCTION__, urb);
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endpoint = usb_pipeendpoint(urb->pipe);
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port = (struct usb_serial_port *) urb->context;
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if (urb->status) {
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dbg("%s: nonzero status: %d on endpoint %02x.",
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__FUNCTION__, urb->status, endpoint);
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} else {
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tty = port->tty;
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if (urb->actual_length) {
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tty_buffer_request_room(tty, urb->actual_length);
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tty_insert_flip_string(tty, data, urb->actual_length);
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tty_flip_buffer_push(tty);
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} else {
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dbg("%s: empty read urb received", __FUNCTION__);
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}
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/* Resubmit urb so we continue receiving */
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if (port->open_count && urb->status != -ESHUTDOWN) {
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err)
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printk(KERN_ERR "%s: resubmit read urb failed. "
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"(%d)", __FUNCTION__, err);
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}
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}
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return;
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}
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static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
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{
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struct usb_serial_port *port;
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dbg("%s", __FUNCTION__);
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port = (struct usb_serial_port *) urb->context;
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if (port->open_count)
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schedule_work(&port->work);
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}
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static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
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{
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int err;
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struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
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struct option_port_private *portdata = usb_get_serial_port_data(port);
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struct usb_serial *serial = port->serial;
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dbg("%s", __FUNCTION__);
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dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
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if (urb->status == 0) {
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struct usb_ctrlrequest *req_pkt =
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(struct usb_ctrlrequest *)urb->transfer_buffer;
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if (!req_pkt) {
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dbg("%s: NULL req_pkt\n", __FUNCTION__);
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return;
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}
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if ((req_pkt->bRequestType == 0xA1) &&
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(req_pkt->bRequest == 0x20)) {
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int old_dcd_state;
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unsigned char signals = *((unsigned char *)
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urb->transfer_buffer +
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sizeof(struct usb_ctrlrequest));
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dbg("%s: signal x%x", __FUNCTION__, signals);
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old_dcd_state = portdata->dcd_state;
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portdata->cts_state = 1;
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portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
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portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
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portdata->ri_state = ((signals & 0x08) ? 1 : 0);
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if (port->tty && !C_CLOCAL(port->tty) &&
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old_dcd_state && !portdata->dcd_state)
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tty_hangup(port->tty);
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} else {
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dbg("%s: type %x req %x", __FUNCTION__,
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req_pkt->bRequestType,req_pkt->bRequest);
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}
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} else
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dbg("%s: error %d", __FUNCTION__, urb->status);
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/* Resubmit urb so we continue receiving IRQ data */
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if (urb->status != -ESHUTDOWN) {
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urb->dev = serial->dev;
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err)
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dbg("%s: resubmit intr urb failed. (%d)",
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__FUNCTION__, err);
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}
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}
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static int option_write_room(struct usb_serial_port *port)
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{
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struct option_port_private *portdata;
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int i;
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int data_len = 0;
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struct urb *this_urb;
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portdata = usb_get_serial_port_data(port);
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for (i=0; i < N_OUT_URB; i++) {
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this_urb = portdata->out_urbs[i];
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if (this_urb && this_urb->status != -EINPROGRESS)
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data_len += OUT_BUFLEN;
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}
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dbg("%s: %d", __FUNCTION__, data_len);
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return data_len;
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}
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static int option_chars_in_buffer(struct usb_serial_port *port)
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{
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struct option_port_private *portdata;
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int i;
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int data_len = 0;
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struct urb *this_urb;
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portdata = usb_get_serial_port_data(port);
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for (i=0; i < N_OUT_URB; i++) {
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this_urb = portdata->out_urbs[i];
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if (this_urb && this_urb->status == -EINPROGRESS)
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data_len += this_urb->transfer_buffer_length;
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}
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dbg("%s: %d", __FUNCTION__, data_len);
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return data_len;
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}
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static int option_open(struct usb_serial_port *port, struct file *filp)
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{
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struct option_port_private *portdata;
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struct usb_serial *serial = port->serial;
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int i, err;
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struct urb *urb;
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portdata = usb_get_serial_port_data(port);
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dbg("%s", __FUNCTION__);
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/* Set some sane defaults */
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portdata->rts_state = 1;
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portdata->dtr_state = 1;
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/* Reset low level data toggle and start reading from endpoints */
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for (i = 0; i < N_IN_URB; i++) {
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urb = portdata->in_urbs[i];
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if (! urb)
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continue;
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if (urb->dev != serial->dev) {
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dbg("%s: dev %p != %p", __FUNCTION__,
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urb->dev, serial->dev);
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continue;
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}
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/*
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* make sure endpoint data toggle is synchronized with the
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* device
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*/
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usb_clear_halt(urb->dev, urb->pipe);
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err = usb_submit_urb(urb, GFP_KERNEL);
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if (err) {
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dbg("%s: submit urb %d failed (%d) %d",
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__FUNCTION__, i, err,
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urb->transfer_buffer_length);
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}
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}
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/* Reset low level data toggle on out endpoints */
|
|
for (i = 0; i < N_OUT_URB; i++) {
|
|
urb = portdata->out_urbs[i];
|
|
if (! urb)
|
|
continue;
|
|
urb->dev = serial->dev;
|
|
/* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
|
|
usb_pipeout(urb->pipe), 0); */
|
|
}
|
|
|
|
port->tty->low_latency = 1;
|
|
|
|
option_send_setup(port);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static inline void stop_urb(struct urb *urb)
|
|
{
|
|
if (urb && urb->status == -EINPROGRESS)
|
|
usb_kill_urb(urb);
|
|
}
|
|
|
|
static void option_close(struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
int i;
|
|
struct usb_serial *serial = port->serial;
|
|
struct option_port_private *portdata;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
portdata->rts_state = 0;
|
|
portdata->dtr_state = 0;
|
|
|
|
if (serial->dev) {
|
|
option_send_setup(port);
|
|
|
|
/* Stop reading/writing urbs */
|
|
for (i = 0; i < N_IN_URB; i++)
|
|
stop_urb(portdata->in_urbs[i]);
|
|
for (i = 0; i < N_OUT_URB; i++)
|
|
stop_urb(portdata->out_urbs[i]);
|
|
}
|
|
port->tty = NULL;
|
|
}
|
|
|
|
/* Helper functions used by option_setup_urbs */
|
|
static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
|
|
int dir, void *ctx, char *buf, int len,
|
|
void (*callback)(struct urb *, struct pt_regs *regs))
|
|
{
|
|
struct urb *urb;
|
|
|
|
if (endpoint == -1)
|
|
return NULL; /* endpoint not needed */
|
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
|
|
if (urb == NULL) {
|
|
dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
|
|
return NULL;
|
|
}
|
|
|
|
/* Fill URB using supplied data. */
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
|
usb_sndbulkpipe(serial->dev, endpoint) | dir,
|
|
buf, len, callback, ctx);
|
|
|
|
return urb;
|
|
}
|
|
|
|
/* Setup urbs */
|
|
static void option_setup_urbs(struct usb_serial *serial)
|
|
{
|
|
int j;
|
|
struct usb_serial_port *port;
|
|
struct option_port_private *portdata;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
port = serial->port[0];
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
/* Do indat endpoints first */
|
|
for (j = 0; j <= N_IN_URB; ++j) {
|
|
portdata->in_urbs[j] = option_setup_urb (serial,
|
|
port->bulk_in_endpointAddress, USB_DIR_IN, port,
|
|
portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
|
|
}
|
|
|
|
/* outdat endpoints */
|
|
for (j = 0; j <= N_OUT_URB; ++j) {
|
|
portdata->out_urbs[j] = option_setup_urb (serial,
|
|
port->bulk_out_endpointAddress, USB_DIR_OUT, port,
|
|
portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
|
|
}
|
|
}
|
|
|
|
static int option_send_setup(struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct option_port_private *portdata;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
if (port->tty) {
|
|
int val = 0;
|
|
if (portdata->dtr_state)
|
|
val |= 0x01;
|
|
if (portdata->rts_state)
|
|
val |= 0x02;
|
|
|
|
return usb_control_msg(serial->dev,
|
|
usb_rcvctrlpipe(serial->dev, 0),
|
|
0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int option_startup(struct usb_serial *serial)
|
|
{
|
|
int i, err;
|
|
struct usb_serial_port *port;
|
|
struct option_port_private *portdata;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
/* Now setup per port private data */
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
port = serial->port[i];
|
|
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
|
|
if (!portdata) {
|
|
dbg("%s: kmalloc for option_port_private (%d) failed!.",
|
|
__FUNCTION__, i);
|
|
return (1);
|
|
}
|
|
|
|
usb_set_serial_port_data(port, portdata);
|
|
|
|
if (! port->interrupt_in_urb)
|
|
continue;
|
|
err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (err)
|
|
dbg("%s: submit irq_in urb failed %d",
|
|
__FUNCTION__, err);
|
|
}
|
|
|
|
option_setup_urbs(serial);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void option_shutdown(struct usb_serial *serial)
|
|
{
|
|
int i, j;
|
|
struct usb_serial_port *port;
|
|
struct option_port_private *portdata;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
/* Stop reading/writing urbs */
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
portdata = usb_get_serial_port_data(port);
|
|
for (j = 0; j < N_IN_URB; j++)
|
|
stop_urb(portdata->in_urbs[j]);
|
|
for (j = 0; j < N_OUT_URB; j++)
|
|
stop_urb(portdata->out_urbs[j]);
|
|
}
|
|
|
|
/* Now free them */
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
for (j = 0; j < N_IN_URB; j++) {
|
|
if (portdata->in_urbs[j]) {
|
|
usb_free_urb(portdata->in_urbs[j]);
|
|
portdata->in_urbs[j] = NULL;
|
|
}
|
|
}
|
|
for (j = 0; j < N_OUT_URB; j++) {
|
|
if (portdata->out_urbs[j]) {
|
|
usb_free_urb(portdata->out_urbs[j]);
|
|
portdata->out_urbs[j] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now free per port private data */
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
port = serial->port[i];
|
|
kfree(usb_get_serial_port_data(port));
|
|
}
|
|
}
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifdef CONFIG_USB_DEBUG
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug messages");
|
|
#endif
|
|
|