Release 4.7 drivers/usb/serial/aircable.c
/*
* AIRcable USB Bluetooth Dongle Driver.
*
* Copyright (C) 2010 Johan Hovold <jhovold@gmail.com>
* Copyright (C) 2006 Manuel Francisco Naranjo (naranjo.manuel@gmail.com)
*
* 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.
*
* The device works as an standard CDC device, it has 2 interfaces, the first
* one is for firmware access and the second is the serial one.
* The protocol is very simply, there are two possibilities reading or writing.
* When writing the first urb must have a Header that starts with 0x20 0x29 the
* next two bytes must say how much data will be sent.
* When reading the process is almost equal except that the header starts with
* 0x00 0x20.
*
* The device simply need some stuff to understand data coming from the usb
* buffer: The First and Second byte is used for a Header, the Third and Fourth
* tells the device the amount of information the package holds.
* Packages are 60 bytes long Header Stuff.
* When writing to the device the first two bytes of the header are 0x20 0x29
* When reading the bytes are 0x00 0x20, or 0x00 0x10, there is an strange
* situation, when too much data arrives to the device because it sends the data
* but with out the header. I will use a simply hack to override this situation,
* if there is data coming that does not contain any header, then that is data
* that must go directly to the tty, as there is no documentation about if there
* is any other control code, I will simply check for the first
* one.
*
* The driver registers himself with the USB-serial core and the USB Core. I had
* to implement a probe function against USB-serial, because other way, the
* driver was attaching himself to both interfaces. I have tried with different
* configurations of usb_serial_driver with out exit, only the probe function
* could handle this correctly.
*
* I have taken some info from a Greg Kroah-Hartman article:
* http://www.linuxjournal.com/article/6573
* And from Linux Device Driver Kit CD, which is a great work, the authors taken
* the work to recompile lots of information an knowledge in drivers development
* and made it all available inside a cd.
* URL: http://kernel.org/pub/linux/kernel/people/gregkh/ddk/
*
*/
#include <asm/unaligned.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/tty_flip.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
/* Vendor and Product ID */
#define AIRCABLE_VID 0x16CA
#define AIRCABLE_USB_PID 0x1502
/* Protocol Stuff */
#define HCI_HEADER_LENGTH 0x4
#define TX_HEADER_0 0x20
#define TX_HEADER_1 0x29
#define RX_HEADER_0 0x00
#define RX_HEADER_1 0x20
#define HCI_COMPLETE_FRAME 64
/* rx_flags */
#define THROTTLED 0x01
#define ACTUALLY_THROTTLED 0x02
#define DRIVER_AUTHOR "Naranjo, Manuel Francisco <naranjo.manuel@gmail.com>, Johan Hovold <jhovold@gmail.com>"
#define DRIVER_DESC "AIRcable USB Driver"
/* ID table that will be registered with USB core */
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(AIRCABLE_VID, AIRCABLE_USB_PID) },
{ },
};
MODULE_DEVICE_TABLE(usb, id_table);
static int aircable_prepare_write_buffer(struct usb_serial_port *port,
void *dest, size_t size)
{
int count;
unsigned char *buf = dest;
count = kfifo_out_locked(&port->write_fifo, buf + HCI_HEADER_LENGTH,
size - HCI_HEADER_LENGTH, &port->lock);
buf[0] = TX_HEADER_0;
buf[1] = TX_HEADER_1;
put_unaligned_le16(count, &buf[2]);
return count + HCI_HEADER_LENGTH;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| johan hovold | johan hovold | 69 | 85.19% | 3 | 60.00% |
| manuel francisco naranjo | manuel francisco naranjo | 8 | 9.88% | 1 | 20.00% |
| david howells | david howells | 4 | 4.94% | 1 | 20.00% |
| Total | 81 | 100.00% | 5 | 100.00% |
static int aircable_probe(struct usb_serial *serial,
const struct usb_device_id *id)
{
struct usb_host_interface *iface_desc = serial->interface->
cur_altsetting;
struct usb_endpoint_descriptor *endpoint;
int num_bulk_out = 0;
int i;
for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_bulk_out(endpoint)) {
dev_dbg(&serial->dev->dev,
"found bulk out on endpoint %d\n", i);
++num_bulk_out;
}
}
if (num_bulk_out == 0) {
dev_dbg(&serial->dev->dev, "Invalid interface, discarding\n");
return -ENODEV;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| johan hovold | johan hovold | 76 | 60.80% | 1 | 33.33% |
| manuel francisco naranjo | manuel francisco naranjo | 31 | 24.80% | 1 | 33.33% |
| greg kroah-hartman | greg kroah-hartman | 18 | 14.40% | 1 | 33.33% |
| Total | 125 | 100.00% | 3 | 100.00% |
static int aircable_process_packet(struct usb_serial_port *port,
int has_headers, char *packet, int len)
{
if (has_headers) {
len -= HCI_HEADER_LENGTH;
packet += HCI_HEADER_LENGTH;
}
if (len <= 0) {
dev_dbg(&port->dev, "%s - malformed packet\n", __func__);
return 0;
}
tty_insert_flip_string(&port->port, packet, len);
return len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| johan hovold | johan hovold | 49 | 67.12% | 1 | 25.00% |
| manuel francisco naranjo | manuel francisco naranjo | 13 | 17.81% | 1 | 25.00% |
| greg kroah-hartman | greg kroah-hartman | 7 | 9.59% | 1 | 25.00% |
| jiri slaby | jiri slaby | 4 | 5.48% | 1 | 25.00% |
| Total | 73 | 100.00% | 4 | 100.00% |
static void aircable_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
char *data = (char *)urb->transfer_buffer;
int has_headers;
int count;
int len;
int i;
has_headers = (urb->actual_length > 2 && data[0] == RX_HEADER_0);
count = 0;
for (i = 0; i < urb->actual_length; i += HCI_COMPLETE_FRAME) {
len = min_t(int, urb->actual_length - i, HCI_COMPLETE_FRAME);
count += aircable_process_packet(port, has_headers,
&data[i], len);
}
if (count)
tty_flip_buffer_push(&port->port);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| manuel francisco naranjo | manuel francisco naranjo | 67 | 52.76% | 1 | 20.00% |
| johan hovold | johan hovold | 53 | 41.73% | 1 | 20.00% |
| jiri slaby | jiri slaby | 4 | 3.15% | 1 | 20.00% |
| greg kroah-hartman | greg kroah-hartman | 2 | 1.57% | 1 | 20.00% |
| alan cox | alan cox | 1 | 0.79% | 1 | 20.00% |
| Total | 127 | 100.00% | 5 | 100.00% |
static struct usb_serial_driver aircable_device = {
.driver = {
.owner = THIS_MODULE,
.name = "aircable",
},
.id_table = id_table,
.num_ports = 1,
.bulk_out_size = HCI_COMPLETE_FRAME,
.probe = aircable_probe,
.process_read_urb = aircable_process_read_urb,
.prepare_write_buffer = aircable_prepare_write_buffer,
.throttle = usb_serial_generic_throttle,
.unthrottle = usb_serial_generic_unthrottle,
};
static struct usb_serial_driver * const serial_drivers[] = {
&aircable_device, NULL
};
module_usb_serial_driver(serial_drivers, id_table);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| manuel francisco naranjo | manuel francisco naranjo | 267 | 44.06% | 1 | 5.56% |
| johan hovold | johan hovold | 262 | 43.23% | 3 | 16.67% |
| greg kroah-hartman | greg kroah-hartman | 30 | 4.95% | 4 | 22.22% |
| alan stern | alan stern | 16 | 2.64% | 1 | 5.56% |
| johannes hoelzl | johannes hoelzl | 11 | 1.82% | 1 | 5.56% |
| jiri slaby | jiri slaby | 8 | 1.32% | 2 | 11.11% |
| david howells | david howells | 4 | 0.66% | 1 | 5.56% |
| paul gortmaker | paul gortmaker | 3 | 0.50% | 1 | 5.56% |
| tejun heo | tejun heo | 2 | 0.33% | 1 | 5.56% |
| alan cox | alan cox | 1 | 0.17% | 1 | 5.56% |
| marton nemeth | marton nemeth | 1 | 0.17% | 1 | 5.56% |
| rahul bedarkar | rahul bedarkar | 1 | 0.17% | 1 | 5.56% |
| Total | 606 | 100.00% | 18 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.