Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux

[PATCH] USB serial: add navman driver

Thanks to Warren Lewis <wlewis@scn.org> for the information needed to
write the driver and for testing it out.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

+165
+7
drivers/usb/serial/Kconfig
··· 403 403 To compile this driver as a module, choose M here: the 404 404 module will be called mct_u232. 405 405 406 + config USB_SERIAL_NAVMAN 407 + tristate "USB Navman GPS device" 408 + depends on USB_SERIAL 409 + help 410 + To compile this driver as a module, choose M here: the 411 + module will be called navman. 412 + 406 413 config USB_SERIAL_PL2303 407 414 tristate "USB Prolific 2303 Single Port Serial Driver" 408 415 depends on USB_SERIAL
+1
drivers/usb/serial/Makefile
··· 32 32 obj-$(CONFIG_USB_SERIAL_KLSI) += kl5kusb105.o 33 33 obj-$(CONFIG_USB_SERIAL_KOBIL_SCT) += kobil_sct.o 34 34 obj-$(CONFIG_USB_SERIAL_MCT_U232) += mct_u232.o 35 + obj-$(CONFIG_USB_SERIAL_NAVMAN) += navman.o 35 36 obj-$(CONFIG_USB_SERIAL_OMNINET) += omninet.o 36 37 obj-$(CONFIG_USB_SERIAL_OPTION) += option.o 37 38 obj-$(CONFIG_USB_SERIAL_PL2303) += pl2303.o
+157
drivers/usb/serial/navman.c
··· 1 + /* 2 + * Navman Serial USB driver 3 + * 4 + * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de> 5 + * 6 + * This program is free software; you can redistribute it and/or 7 + * modify it under the terms of the GNU General Public License 8 + * version 2 as published by the Free Software Foundation. 9 + */ 10 + 11 + #include <linux/kernel.h> 12 + #include <linux/init.h> 13 + #include <linux/tty.h> 14 + #include <linux/tty_flip.h> 15 + #include <linux/module.h> 16 + #include <linux/usb.h> 17 + #include "usb-serial.h" 18 + 19 + static int debug; 20 + 21 + static struct usb_device_id id_table [] = { 22 + { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */ 23 + { }, 24 + }; 25 + MODULE_DEVICE_TABLE(usb, id_table); 26 + 27 + static struct usb_driver navman_driver = { 28 + .name = "navman", 29 + .probe = usb_serial_probe, 30 + .disconnect = usb_serial_disconnect, 31 + .id_table = id_table, 32 + .no_dynamic_id = 1, 33 + }; 34 + 35 + static void navman_read_int_callback(struct urb *urb, struct pt_regs *regs) 36 + { 37 + struct usb_serial_port *port = urb->context; 38 + unsigned char *data = urb->transfer_buffer; 39 + struct tty_struct *tty; 40 + int result; 41 + 42 + switch (urb->status) { 43 + case 0: 44 + /* success */ 45 + break; 46 + case -ECONNRESET: 47 + case -ENOENT: 48 + case -ESHUTDOWN: 49 + /* this urb is terminated, clean up */ 50 + dbg("%s - urb shutting down with status: %d", 51 + __FUNCTION__, urb->status); 52 + return; 53 + default: 54 + dbg("%s - nonzero urb status received: %d", 55 + __FUNCTION__, urb->status); 56 + goto exit; 57 + } 58 + 59 + usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 60 + urb->actual_length, data); 61 + 62 + tty = port->tty; 63 + if (tty && urb->actual_length) { 64 + tty_buffer_request_room(tty, urb->actual_length); 65 + tty_insert_flip_string(tty, data, urb->actual_length); 66 + tty_flip_buffer_push(tty); 67 + } 68 + 69 + exit: 70 + result = usb_submit_urb(urb, GFP_ATOMIC); 71 + if (result) 72 + dev_err(&urb->dev->dev, 73 + "%s - Error %d submitting interrupt urb\n", 74 + __FUNCTION__, result); 75 + } 76 + 77 + static int navman_open(struct usb_serial_port *port, struct file *filp) 78 + { 79 + int result = 0; 80 + 81 + dbg("%s - port %d", __FUNCTION__, port->number); 82 + 83 + if (port->interrupt_in_urb) { 84 + dbg("%s - adding interrupt input for treo", __FUNCTION__); 85 + result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 86 + if (result) 87 + dev_err(&port->dev, 88 + "%s - failed submitting interrupt urb, error %d\n", 89 + __FUNCTION__, result); 90 + } 91 + return result; 92 + } 93 + 94 + static void navman_close(struct usb_serial_port *port, struct file *filp) 95 + { 96 + dbg("%s - port %d", __FUNCTION__, port->number); 97 + 98 + if (port->interrupt_in_urb) 99 + usb_kill_urb(port->interrupt_in_urb); 100 + } 101 + 102 + static int navman_write(struct usb_serial_port *port, 103 + const unsigned char *buf, int count) 104 + { 105 + dbg("%s - port %d", __FUNCTION__, port->number); 106 + 107 + /* 108 + * This device can't write any data, only read from the device 109 + * so we just silently eat all data sent to us and say it was 110 + * successfully sent. 111 + * Evil, I know, but do you have a better idea? 112 + */ 113 + 114 + return count; 115 + } 116 + 117 + static struct usb_serial_driver navman_device = { 118 + .driver = { 119 + .owner = THIS_MODULE, 120 + .name = "navman", 121 + }, 122 + .id_table = id_table, 123 + .num_interrupt_in = NUM_DONT_CARE, 124 + .num_bulk_in = NUM_DONT_CARE, 125 + .num_bulk_out = NUM_DONT_CARE, 126 + .num_ports = 1, 127 + .open = navman_open, 128 + .close = navman_close, 129 + .write = navman_write, 130 + .read_int_callback = navman_read_int_callback, 131 + }; 132 + 133 + static int __init navman_init(void) 134 + { 135 + int retval; 136 + 137 + retval = usb_serial_register(&navman_device); 138 + if (retval) 139 + return retval; 140 + retval = usb_register(&navman_driver); 141 + if (retval) 142 + usb_serial_deregister(&navman_device); 143 + return retval; 144 + } 145 + 146 + static void __exit navman_exit(void) 147 + { 148 + usb_deregister(&navman_driver); 149 + usb_serial_deregister(&navman_device); 150 + } 151 + 152 + module_init(navman_init); 153 + module_exit(navman_exit); 154 + MODULE_LICENSE("GPL"); 155 + 156 + module_param(debug, bool, S_IRUGO | S_IWUSR); 157 + MODULE_PARM_DESC(debug, "Debug enabled or not");