/* * Navman Serial USB driver * * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * TODO: * Add termios method that uses copy_hw but also kills all echo * flags as the navman is rx only so cannot echo. */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/module.h> #include <linux/usb.h> #include <linux/usb/serial.h> static int debug; static struct usb_device_id id_table [] = { { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */ { }, }; MODULE_DEVICE_TABLE(usb, id_table); static struct usb_driver navman_driver = { .name = "navman", .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table, .no_dynamic_id = 1, }; static void navman_read_int_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; struct tty_struct *tty; int status = urb->status; int result; switch (status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __func__, status); return; default: dbg("%s - nonzero urb status received: %d", __func__, status); goto exit; } usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data); tty = tty_port_tty_get(&port->port); if (tty && urb->actual_length) { tty_buffer_request_room(tty, urb->actual_length); tty_insert_flip_string(tty, data, urb->actual_length); tty_flip_buffer_push(tty); } tty_kref_put(tty); exit: result = usb_submit_urb(urb, GFP_ATOMIC); if (result) dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n", __func__, result); } static int navman_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) { int result = 0; dbg("%s - port %d", __func__, port->number); if (port->interrupt_in_urb) { dbg("%s - adding interrupt input for treo", __func__); result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); if (result) dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __func__, result); } return result; } static void navman_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) { dbg("%s - port %d", __func__, port->number); usb_kill_urb(port->interrupt_in_urb); } static int navman_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count) { dbg("%s - port %d", __func__, port->number); /* * This device can't write any data, only read from the device */ return -EOPNOTSUPP; } static struct usb_serial_driver navman_device = { .driver = { .owner = THIS_MODULE, .name = "navman", }, .id_table = id_table, .usb_driver = &navman_driver, .num_ports = 1, .open = navman_open, .close = navman_close, .write = navman_write, .read_int_callback = navman_read_int_callback, }; static int __init navman_init(void) { int retval; retval = usb_serial_register(&navman_device); if (retval) return retval; retval = usb_register(&navman_driver); if (retval) usb_serial_deregister(&navman_device); return retval; } static void __exit navman_exit(void) { usb_deregister(&navman_driver); usb_serial_deregister(&navman_device); } module_init(navman_init); module_exit(navman_exit); MODULE_LICENSE("GPL"); module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug enabled or not");