+++ /dev/null
-/*
- * bluetty.c Version 0.13
- *
- * Copyright (C) 2000, 2001 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (C) 2000 Mark Douglas Corner <mcorner@umich.edu>
- *
- * USB Bluetooth TTY driver, based on the Bluetooth Spec version 1.0B
- *
- * (2001/11/30) Version 0.13 gkh
- * - added locking patch from Masoodur Rahman <rmasoodu@in.ibm.com>
- * - removed active variable, as open_count will do.
- *
- * (2001/07/09) Version 0.12 gkh
- * - removed in_interrupt() call, as it doesn't make sense to do
- * that anymore.
- *
- * (2001/06/05) Version 0.11 gkh
- * - Fixed problem with read urb status saying that we have shutdown,
- * and that we shouldn't resubmit the urb. Patch from unknown.
- *
- * (2001/05/28) Version 0.10 gkh
- * - Fixed problem with using data from userspace in the bluetooth_write
- * function as found by the CHECKER project.
- * - Added a buffer to the write_urb_pool which reduces the number of
- * buffers being created and destroyed for ever write. Also cleans
- * up the logic a bit.
- * - Added a buffer to the control_urb_pool which fixes a memory leak
- * when the device is removed from the system.
- *
- * (2001/05/28) Version 0.9 gkh
- * Fixed problem with bluetooth==NULL for bluetooth_read_bulk_callback
- * which was found by both the CHECKER project and Mikko Rahkonen.
- *
- * (08/04/2001) gb
- * Identify version on module load.
- *
- * (2001/03/10) Version 0.8 gkh
- * Fixed problem with not unlinking interrupt urb on device close
- * and resubmitting the read urb on error with bluetooth struct.
- * Thanks to Narayan Mohanram <narayan@RovingNetworks.com> for the
- * fixes.
- *
- * (11/29/2000) Version 0.7 gkh
- * Fixed problem with overrunning the tty flip buffer.
- * Removed unneeded NULL pointer initialization.
- *
- * (10/05/2000) Version 0.6 gkh
- * Fixed bug with urb->dev not being set properly, now that the usb
- * core needs it.
- * Got a real major id number and name.
- *
- * (08/06/2000) Version 0.5 gkh
- * Fixed problem of not resubmitting the bulk read urb if there is
- * an error in the callback. Ericsson devices seem to need this.
- *
- * (07/11/2000) Version 0.4 gkh
- * Fixed bug in disconnect for when we call tty_hangup
- * Fixed bug in bluetooth_ctrl_msg where the bluetooth struct was not
- * getting attached to the control urb properly.
- * Fixed bug in bluetooth_write where we pay attention to the result
- * of bluetooth_ctrl_msg.
- *
- * (08/03/2000) Version 0.3 gkh mdc
- * Merged in Mark's changes to make the driver play nice with the Axis
- * stack.
- * Made the write bulk use an urb pool to enable larger transfers with
- * fewer calls to the driver.
- * Fixed off by one bug in acl pkt receive
- * Made packet counters specific to each bluetooth device
- * Added checks for zero length callbacks
- * Added buffers for int and bulk packets. Had to do this otherwise
- * packet types could intermingle.
- * Made a control urb pool for the control messages.
- *
- * (07/11/2000) Version 0.2 gkh
- * Fixed a small bug found by Nils Faerber in the usb_bluetooth_probe
- * function.
- *
- * (07/09/2000) Version 0.1 gkh
- * Initial release. Has support for sending ACL data (which is really just
- * a HCI frame.) Raw HCI commands and HCI events are not supported.
- * A ioctl will probably be needed for the HCI commands and events in the
- * future. All isoch endpoints are ignored at this time also.
- * This driver should work for all currently shipping USB Bluetooth
- * devices at this time :)
- *
- */
-
-/*
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/tty.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_flip.h>
-#include <linux/module.h>
-#include <asm/uaccess.h>
-
-#define DEBUG
-#include <linux/usb.h>
-
-/*
- * Version Information
- */
-#define DRIVER_VERSION "v0.13"
-#define DRIVER_AUTHOR "Greg Kroah-Hartman, Mark Douglas Corner"
-#define DRIVER_DESC "USB Bluetooth tty driver"
-
-/* define this if you have hardware that is not good */
-/*#define BTBUGGYHARDWARE */
-
-/* Class, SubClass, and Protocol codes that describe a Bluetooth device */
-#define WIRELESS_CLASS_CODE 0xe0
-#define RF_SUBCLASS_CODE 0x01
-#define BLUETOOTH_PROGRAMMING_PROTOCOL_CODE 0x01
-
-
-#define BLUETOOTH_TTY_MAJOR 216 /* real device node major id */
-#define BLUETOOTH_TTY_MINORS 256 /* whole lotta bluetooth devices */
-
-#define USB_BLUETOOTH_MAGIC 0x6d02 /* magic number for bluetooth struct */
-
-#define BLUETOOTH_CONTROL_REQUEST_TYPE 0x20
-
-/* Bluetooth packet types */
-#define CMD_PKT 0x01
-#define ACL_PKT 0x02
-#define SCO_PKT 0x03
-#define EVENT_PKT 0x04
-#define ERROR_PKT 0x05
-#define NEG_PKT 0x06
-
-/* Message sizes */
-#define MAX_EVENT_SIZE 0xFF
-#define EVENT_HDR_SIZE 3 /* 2 for the header + 1 for the type indicator */
-#define EVENT_BUFFER_SIZE (MAX_EVENT_SIZE + EVENT_HDR_SIZE)
-
-#define MAX_ACL_SIZE 0xFFFF
-#define ACL_HDR_SIZE 5 /* 4 for the header + 1 for the type indicator */
-#define ACL_BUFFER_SIZE (MAX_ACL_SIZE + ACL_HDR_SIZE)
-
-/* parity check flag */
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
-#define CHAR2INT16(c1,c0) (((u32)((c1) & 0xff) << 8) + (u32)((c0) & 0xff))
-
-#define NUM_BULK_URBS 24
-#define NUM_CONTROL_URBS 16
-
-struct usb_bluetooth {
- int magic;
- struct usb_device * dev;
- struct tty_driver * tty_driver; /* the tty_driver for this device */
- struct tty_struct * tty; /* the corresponding tty for this port */
-
- unsigned char minor; /* the starting minor number for this device */
- int throttle; /* throttled by tty layer */
- int open_count;
-
- __u8 control_out_bInterfaceNum;
- struct urb * control_urb_pool[NUM_CONTROL_URBS];
- struct usb_ctrlrequest dr[NUM_CONTROL_URBS];
-
- unsigned char * interrupt_in_buffer;
- struct urb * interrupt_in_urb;
- __u8 interrupt_in_endpointAddress;
- __u8 interrupt_in_interval;
- int interrupt_in_buffer_size;
-
- unsigned char * bulk_in_buffer;
- struct urb * read_urb;
- __u8 bulk_in_endpointAddress;
- int bulk_in_buffer_size;
-
- int bulk_out_buffer_size;
- __u8 bulk_out_endpointAddress;
-
- wait_queue_head_t write_wait;
-
- struct work_struct work; /* work queue entry for line discipline waking up */
-
- unsigned int int_packet_pos;
- unsigned char int_buffer[EVENT_BUFFER_SIZE];
- unsigned int bulk_packet_pos;
- unsigned char bulk_buffer[ACL_BUFFER_SIZE]; /* 64k preallocated, fix? */
- struct semaphore lock;
-};
-
-
-/* local function prototypes */
-static int bluetooth_open (struct tty_struct *tty, struct file *filp);
-static void bluetooth_close (struct tty_struct *tty, struct file *filp);
-static int bluetooth_write (struct tty_struct *tty, const unsigned char *buf, int count);
-static int bluetooth_write_room (struct tty_struct *tty);
-static int bluetooth_chars_in_buffer (struct tty_struct *tty);
-static void bluetooth_throttle (struct tty_struct *tty);
-static void bluetooth_unthrottle (struct tty_struct *tty);
-static int bluetooth_ioctl (struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
-static void bluetooth_set_termios (struct tty_struct *tty, struct termios *old);
-
-static void bluetooth_int_callback (struct urb *urb, struct pt_regs *regs);
-static void bluetooth_ctrl_callback (struct urb *urb, struct pt_regs *regs);
-static void bluetooth_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
-static void bluetooth_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
-
-static int usb_bluetooth_probe (struct usb_interface *intf,
- const struct usb_device_id *id);
-static void usb_bluetooth_disconnect (struct usb_interface *intf);
-
-
-static struct usb_device_id usb_bluetooth_ids [] = {
- { USB_DEVICE_INFO(WIRELESS_CLASS_CODE, RF_SUBCLASS_CODE, BLUETOOTH_PROGRAMMING_PROTOCOL_CODE) },
- { } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE (usb, usb_bluetooth_ids);
-
-static struct usb_driver usb_bluetooth_driver = {
- .owner = THIS_MODULE,
- .name = "bluetty",
- .probe = usb_bluetooth_probe,
- .disconnect = usb_bluetooth_disconnect,
- .id_table = usb_bluetooth_ids,
-};
-
-static struct tty_driver *bluetooth_tty_driver;
-static struct usb_bluetooth *bluetooth_table[BLUETOOTH_TTY_MINORS];
-
-
-static inline int bluetooth_paranoia_check (struct usb_bluetooth *bluetooth, const char *function)
-{
- if (!bluetooth) {
- dbg("%s - bluetooth == NULL", function);
- return -1;
- }
- if (bluetooth->magic != USB_BLUETOOTH_MAGIC) {
- dbg("%s - bad magic number for bluetooth", function);
- return -1;
- }
-
- return 0;
-}
-
-
-static inline struct usb_bluetooth* get_usb_bluetooth (struct usb_bluetooth *bluetooth, const char *function)
-{
- if (!bluetooth ||
- bluetooth_paranoia_check (bluetooth, function)) {
- /* then say that we don't have a valid usb_bluetooth thing, which will
- * end up generating -ENODEV return values */
- return NULL;
- }
-
- return bluetooth;
-}
-
-
-static inline struct usb_bluetooth *get_bluetooth_by_index (int index)
-{
- return bluetooth_table[index];
-}
-
-
-static int bluetooth_ctrl_msg (struct usb_bluetooth *bluetooth, int request, int value, const unsigned char *buf, int len)
-{
- struct urb *urb = NULL;
- struct usb_ctrlrequest *dr = NULL;
- int i;
- int status;
-
- dbg ("%s", __FUNCTION__);
-
- /* try to find a free urb in our list */
- for (i = 0; i < NUM_CONTROL_URBS; ++i) {
- if (bluetooth->control_urb_pool[i]->status != -EINPROGRESS) {
- urb = bluetooth->control_urb_pool[i];
- dr = &bluetooth->dr[i];
- break;
- }
- }
- if (urb == NULL) {
- dbg ("%s - no free urbs", __FUNCTION__);
- return -ENOMEM;
- }
-
- /* keep increasing the urb transfer buffer to fit the size of the message */
- if (urb->transfer_buffer == NULL) {
- urb->transfer_buffer = kmalloc (len, GFP_KERNEL);
- if (urb->transfer_buffer == NULL) {
- err ("%s - out of memory", __FUNCTION__);
- return -ENOMEM;
- }
- }
- if (urb->transfer_buffer_length < len) {
- kfree(urb->transfer_buffer);
- urb->transfer_buffer = kmalloc (len, GFP_KERNEL);
- if (urb->transfer_buffer == NULL) {
- err ("%s - out of memory", __FUNCTION__);
- return -ENOMEM;
- }
- }
- memcpy (urb->transfer_buffer, buf, len);
-
- dr->bRequestType= BLUETOOTH_CONTROL_REQUEST_TYPE;
- dr->bRequest = request;
- dr->wValue = cpu_to_le16((u16) value);
- dr->wIndex = cpu_to_le16((u16) bluetooth->control_out_bInterfaceNum);
- dr->wLength = cpu_to_le16((u16) len);
-
- usb_fill_control_urb (urb, bluetooth->dev, usb_sndctrlpipe(bluetooth->dev, 0),
- (unsigned char*)dr, urb->transfer_buffer, len, bluetooth_ctrl_callback, bluetooth);
-
- /* send it down the pipe */
- status = usb_submit_urb(urb, GFP_KERNEL);
- if (status)
- dbg("%s - usb_submit_urb(control) failed with status = %d", __FUNCTION__, status);
-
- return status;
-}
-
-
-
-
-
-/*****************************************************************************
- * Driver tty interface functions
- *****************************************************************************/
-static int bluetooth_open (struct tty_struct *tty, struct file * filp)
-{
- struct usb_bluetooth *bluetooth;
- int result;
-
- dbg("%s", __FUNCTION__);
-
- /* initialize the pointer incase something fails */
- tty->driver_data = NULL;
-
- /* get the bluetooth object associated with this tty pointer */
- bluetooth = get_bluetooth_by_index (tty->index);
-
- if (bluetooth_paranoia_check (bluetooth, __FUNCTION__)) {
- return -ENODEV;
- }
-
- down (&bluetooth->lock);
-
- ++bluetooth->open_count;
- if (bluetooth->open_count == 1) {
- /* set up our structure making the tty driver remember our object, and us it */
- tty->driver_data = bluetooth;
- bluetooth->tty = tty;
-
- /* force low_latency on so that our tty_push actually forces the data through,
- * otherwise it is scheduled, and with high data rates (like with OHCI) data
- * can get lost. */
- bluetooth->tty->low_latency = 1;
-
- /* Reset the packet position counters */
- bluetooth->int_packet_pos = 0;
- bluetooth->bulk_packet_pos = 0;
-
-#ifndef BTBUGGYHARDWARE
- /* Start reading from the device */
- usb_fill_bulk_urb (bluetooth->read_urb, bluetooth->dev,
- usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
- bluetooth->bulk_in_buffer,
- bluetooth->bulk_in_buffer_size,
- bluetooth_read_bulk_callback, bluetooth);
- result = usb_submit_urb(bluetooth->read_urb, GFP_KERNEL);
- if (result)
- dbg("%s - usb_submit_urb(read bulk) failed with status %d", __FUNCTION__, result);
-#endif
- usb_fill_int_urb (bluetooth->interrupt_in_urb, bluetooth->dev,
- usb_rcvintpipe(bluetooth->dev, bluetooth->interrupt_in_endpointAddress),
- bluetooth->interrupt_in_buffer,
- bluetooth->interrupt_in_buffer_size,
- bluetooth_int_callback, bluetooth,
- bluetooth->interrupt_in_interval);
- result = usb_submit_urb(bluetooth->interrupt_in_urb, GFP_KERNEL);
- if (result)
- dbg("%s - usb_submit_urb(interrupt in) failed with status %d", __FUNCTION__, result);
- }
-
- up(&bluetooth->lock);
-
- return 0;
-}
-
-
-static void bluetooth_close (struct tty_struct *tty, struct file * filp)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
-
- if (!bluetooth) {
- return;
- }
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not opened", __FUNCTION__);
- return;
- }
-
- down (&bluetooth->lock);
-
- --bluetooth->open_count;
- if (bluetooth->open_count <= 0) {
- bluetooth->open_count = 0;
-
- /* shutdown any in-flight urbs that we know about */
- usb_kill_urb (bluetooth->read_urb);
- usb_kill_urb (bluetooth->interrupt_in_urb);
- }
- up(&bluetooth->lock);
-}
-
-
-static int bluetooth_write (struct tty_struct * tty, const unsigned char *buf, int count)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
- struct urb *urb = NULL;
- unsigned char *temp_buffer = NULL;
- const unsigned char *current_buffer;
- unsigned char *urb_buffer;
- int i;
- int retval = 0;
-
- if (!bluetooth) {
- return -ENODEV;
- }
-
- dbg("%s - %d byte(s)", __FUNCTION__, count);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not opened", __FUNCTION__);
- return -EINVAL;
- }
-
- if (count == 0) {
- dbg("%s - write request of 0 bytes", __FUNCTION__);
- return 0;
- }
- if (count == 1) {
- dbg("%s - write request only included type %d", __FUNCTION__, buf[0]);
- return 1;
- }
-
-#ifdef DEBUG
- printk (KERN_DEBUG __FILE__ ": %s - length = %d, data = ", __FUNCTION__, count);
- for (i = 0; i < count; ++i) {
- printk ("%.2x ", buf[i]);
- }
- printk ("\n");
-#endif
-
- current_buffer = buf;
-
- switch (*current_buffer) {
- /* First byte indicates the type of packet */
- case CMD_PKT:
- /* dbg("%s- Send cmd_pkt len:%d", __FUNCTION__, count);*/
-
- retval = bluetooth_ctrl_msg (bluetooth, 0x00, 0x00, ¤t_buffer[1], count-1);
- if (retval) {
- goto exit;
- }
- retval = count;
- break;
-
- case ACL_PKT:
- ++current_buffer;
- --count;
-
- urb_buffer = kmalloc (count, GFP_ATOMIC);
- if (!urb_buffer) {
- dev_err(&bluetooth->dev->dev, "out of memory\n");
- retval = -ENOMEM;
- goto exit;
- }
-
- urb = usb_alloc_urb(0, GFP_ATOMIC);
- if (!urb) {
- dev_err(&bluetooth->dev->dev, "no more free urbs\n");
- kfree(urb_buffer);
- retval = -ENOMEM;
- goto exit;
- }
- memcpy (urb_buffer, current_buffer, count);
-
- /* build up our urb */
- usb_fill_bulk_urb(urb, bluetooth->dev,
- usb_sndbulkpipe(bluetooth->dev,
- bluetooth->bulk_out_endpointAddress),
- urb_buffer,
- count,
- bluetooth_write_bulk_callback,
- bluetooth);
-
-
- /* send it down the pipe */
- retval = usb_submit_urb(urb, GFP_KERNEL);
- if (retval) {
- dbg("%s - usb_submit_urb(write bulk) failed with error = %d", __FUNCTION__, retval);
- goto exit;
- }
-
- /* we are done with this urb, so let the host driver
- * really free it when it is finished with it */
- usb_free_urb (urb);
- retval = count + 1;
- break;
-
- default :
- dbg("%s - unsupported (at this time) write type", __FUNCTION__);
- retval = -EINVAL;
- break;
- }
-
-exit:
- kfree(temp_buffer);
-
- return retval;
-}
-
-
-static int bluetooth_write_room (struct tty_struct *tty)
-{
- dbg("%s", __FUNCTION__);
-
- /*
- * We really can take anything the user throws at us
- * but let's pick a nice big number to tell the tty
- * layer that we have lots of free space
- */
- return 2048;
-}
-
-
-static int bluetooth_chars_in_buffer (struct tty_struct *tty)
-{
- dbg("%s", __FUNCTION__);
-
- /*
- * We can't really account for how much data we
- * have sent out, but hasn't made it through to the
- * device, so just tell the tty layer that everything
- * is flushed.
- */
- return 0;
-}
-
-
-static void bluetooth_throttle (struct tty_struct * tty)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
-
- if (!bluetooth) {
- return;
- }
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not open", __FUNCTION__);
- return;
- }
-
- dbg("%s unsupported (at this time)", __FUNCTION__);
-
- return;
-}
-
-
-static void bluetooth_unthrottle (struct tty_struct * tty)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
-
- if (!bluetooth) {
- return;
- }
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not open", __FUNCTION__);
- return;
- }
-
- dbg("%s unsupported (at this time)", __FUNCTION__);
-}
-
-
-static int bluetooth_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
-
- if (!bluetooth) {
- return -ENODEV;
- }
-
- dbg("%s - cmd 0x%.4x", __FUNCTION__, cmd);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not open", __FUNCTION__);
- return -ENODEV;
- }
-
- /* FIXME!!! */
- return -ENOIOCTLCMD;
-}
-
-
-static void bluetooth_set_termios (struct tty_struct *tty, struct termios * old)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
-
- if (!bluetooth) {
- return;
- }
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not open", __FUNCTION__);
- return;
- }
-
- /* FIXME!!! */
-
- return;
-}
-
-
-#ifdef BTBUGGYHARDWARE
-void btusb_enable_bulk_read(struct tty_struct *tty){
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
- int result;
-
- if (!bluetooth) {
- return;
- }
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not open", __FUNCTION__);
- return;
- }
-
- if (bluetooth->read_urb) {
- usb_fill_bulk_urb(bluetooth->read_urb, bluetooth->dev,
- usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
- bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
- bluetooth_read_bulk_callback, bluetooth);
- result = usb_submit_urb(bluetooth->read_urb, GFP_KERNEL);
- if (result)
- err ("%s - failed submitting read urb, error %d", __FUNCTION__, result);
- }
-}
-
-void btusb_disable_bulk_read(struct tty_struct *tty){
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
-
- if (!bluetooth) {
- return;
- }
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth->open_count) {
- dbg ("%s - device not open", __FUNCTION__);
- return;
- }
-
- if ((bluetooth->read_urb) && (bluetooth->read_urb->actual_length))
- usb_kill_urb(bluetooth->read_urb);
-}
-#endif
-
-
-/*****************************************************************************
- * urb callback functions
- *****************************************************************************/
-
-
-static void bluetooth_int_callback (struct urb *urb, struct pt_regs *regs)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
- unsigned char *data = urb->transfer_buffer;
- unsigned int i;
- unsigned int count = urb->actual_length;
- unsigned int packet_size;
- int status;
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth) {
- dbg("%s - bad bluetooth pointer, exiting", __FUNCTION__);
- return;
- }
-
- switch (urb->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", __FUNCTION__, urb->status);
- return;
- default:
- dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
- goto exit;
- }
-
- if (!count) {
- dbg("%s - zero length int", __FUNCTION__);
- goto exit;
- }
-
-
-#ifdef DEBUG
- if (count) {
- printk (KERN_DEBUG __FILE__ ": %s- length = %d, data = ", __FUNCTION__, count);
- for (i = 0; i < count; ++i) {
- printk ("%.2x ", data[i]);
- }
- printk ("\n");
- }
-#endif
-
-#ifdef BTBUGGYHARDWARE
- if ((count >= 2) && (data[0] == 0xFF) && (data[1] == 0x00)) {
- data += 2;
- count -= 2;
- }
- if (count == 0) {
- urb->actual_length = 0;
- goto exit;
- }
-#endif
- /* We add a packet type identifier to the beginning of each
- HCI frame. This makes the data in the tty look like a
- serial USB devices. Each HCI frame can be broken across
- multiple URBs so we buffer them until we have a full hci
- packet */
-
- if (!bluetooth->int_packet_pos) {
- bluetooth->int_buffer[0] = EVENT_PKT;
- bluetooth->int_packet_pos++;
- }
-
- if (bluetooth->int_packet_pos + count > EVENT_BUFFER_SIZE) {
- err("%s - exceeded EVENT_BUFFER_SIZE", __FUNCTION__);
- bluetooth->int_packet_pos = 0;
- goto exit;
- }
-
- memcpy (&bluetooth->int_buffer[bluetooth->int_packet_pos],
- urb->transfer_buffer, count);
- bluetooth->int_packet_pos += count;
- urb->actual_length = 0;
-
- if (bluetooth->int_packet_pos >= EVENT_HDR_SIZE)
- packet_size = bluetooth->int_buffer[2];
- else
- goto exit;
-
- if (packet_size + EVENT_HDR_SIZE < bluetooth->int_packet_pos) {
- err("%s - packet was too long", __FUNCTION__);
- bluetooth->int_packet_pos = 0;
- goto exit;
- }
-
- if (packet_size + EVENT_HDR_SIZE == bluetooth->int_packet_pos) {
- for (i = 0; i < bluetooth->int_packet_pos; ++i) {
- /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them */
- if (bluetooth->tty->flip.count >= TTY_FLIPBUF_SIZE) {
- tty_flip_buffer_push(bluetooth->tty);
- }
- tty_insert_flip_char(bluetooth->tty, bluetooth->int_buffer[i], 0);
- }
- tty_flip_buffer_push(bluetooth->tty);
-
- bluetooth->int_packet_pos = 0;
- }
-
-exit:
- status = usb_submit_urb (urb, GFP_ATOMIC);
- if (status)
- err ("%s - usb_submit_urb failed with result %d",
- __FUNCTION__, status);
-}
-
-
-static void bluetooth_ctrl_callback (struct urb *urb, struct pt_regs *regs)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth) {
- dbg("%s - bad bluetooth pointer, exiting", __FUNCTION__);
- return;
- }
-
- if (urb->status) {
- dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
- return;
- }
-}
-
-
-static void bluetooth_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
- unsigned char *data = urb->transfer_buffer;
- unsigned int count = urb->actual_length;
- unsigned int i;
- unsigned int packet_size;
- int result;
-
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth) {
- dbg("%s - bad bluetooth pointer, exiting", __FUNCTION__);
- return;
- }
-
- if (urb->status) {
- dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
- if (urb->status == -ENOENT) {
- dbg("%s - URB canceled, won't reschedule", __FUNCTION__);
- return;
- }
- goto exit;
- }
-
- if (!count) {
- dbg("%s - zero length read bulk", __FUNCTION__);
- goto exit;
- }
-
-#ifdef DEBUG
- if (count) {
- printk (KERN_DEBUG __FILE__ ": %s- length = %d, data = ", __FUNCTION__, count);
- for (i = 0; i < count; ++i) {
- printk ("%.2x ", data[i]);
- }
- printk ("\n");
- }
-#endif
-#ifdef BTBUGGYHARDWARE
- if ((count == 4) && (data[0] == 0x00) && (data[1] == 0x00)
- && (data[2] == 0x00) && (data[3] == 0x00)) {
- urb->actual_length = 0;
- usb_fill_bulk_urb(bluetooth->read_urb, bluetooth->dev,
- usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
- bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
- bluetooth_read_bulk_callback, bluetooth);
- result = usb_submit_urb(bluetooth->read_urb, GFP_KERNEL);
- if (result)
- err ("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
-
- return;
- }
-#endif
- /* We add a packet type identifier to the beginning of each
- HCI frame. This makes the data in the tty look like a
- serial USB devices. Each HCI frame can be broken across
- multiple URBs so we buffer them until we have a full hci
- packet */
-
- if (!bluetooth->bulk_packet_pos) {
- bluetooth->bulk_buffer[0] = ACL_PKT;
- bluetooth->bulk_packet_pos++;
- }
-
- if (bluetooth->bulk_packet_pos + count > ACL_BUFFER_SIZE) {
- err("%s - exceeded ACL_BUFFER_SIZE", __FUNCTION__);
- bluetooth->bulk_packet_pos = 0;
- goto exit;
- }
-
- memcpy (&bluetooth->bulk_buffer[bluetooth->bulk_packet_pos],
- urb->transfer_buffer, count);
- bluetooth->bulk_packet_pos += count;
- urb->actual_length = 0;
-
- if (bluetooth->bulk_packet_pos >= ACL_HDR_SIZE) {
- packet_size = CHAR2INT16(bluetooth->bulk_buffer[4],bluetooth->bulk_buffer[3]);
- } else {
- goto exit;
- }
-
- if (packet_size + ACL_HDR_SIZE < bluetooth->bulk_packet_pos) {
- err("%s - packet was too long", __FUNCTION__);
- bluetooth->bulk_packet_pos = 0;
- goto exit;
- }
-
- if (packet_size + ACL_HDR_SIZE == bluetooth->bulk_packet_pos) {
- for (i = 0; i < bluetooth->bulk_packet_pos; ++i) {
- /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
- if (bluetooth->tty->flip.count >= TTY_FLIPBUF_SIZE) {
- tty_flip_buffer_push(bluetooth->tty);
- }
- tty_insert_flip_char(bluetooth->tty, bluetooth->bulk_buffer[i], 0);
- }
- tty_flip_buffer_push(bluetooth->tty);
- bluetooth->bulk_packet_pos = 0;
- }
-
-exit:
- if (!bluetooth || !bluetooth->open_count)
- return;
-
- usb_fill_bulk_urb(bluetooth->read_urb, bluetooth->dev,
- usb_rcvbulkpipe(bluetooth->dev, bluetooth->bulk_in_endpointAddress),
- bluetooth->bulk_in_buffer, bluetooth->bulk_in_buffer_size,
- bluetooth_read_bulk_callback, bluetooth);
- result = usb_submit_urb(bluetooth->read_urb, GFP_KERNEL);
- if (result)
- err ("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
-
- return;
-}
-
-
-static void bluetooth_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
-
- dbg("%s", __FUNCTION__);
-
- /* free up the transfer buffer, as usb_free_urb() does not do this */
- kfree(urb->transfer_buffer);
-
- if (!bluetooth) {
- dbg("%s - bad bluetooth pointer, exiting", __FUNCTION__);
- return;
- }
-
- if (urb->status) {
- dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
- return;
- }
-
- /* wake up our little function to let the tty layer know that something happened */
- schedule_work(&bluetooth->work);
-}
-
-
-static void bluetooth_softint(void *private)
-{
- struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)private, __FUNCTION__);
-
- dbg("%s", __FUNCTION__);
-
- if (!bluetooth)
- return;
-
- tty_wakeup(bluetooth->tty);
-}
-
-
-static int usb_bluetooth_probe (struct usb_interface *intf,
- const struct usb_device_id *id)
-{
- struct usb_device *dev = interface_to_usbdev (intf);
- struct usb_bluetooth *bluetooth = NULL;
- struct usb_host_interface *interface;
- struct usb_endpoint_descriptor *endpoint;
- struct usb_endpoint_descriptor *interrupt_in_endpoint[8];
- struct usb_endpoint_descriptor *bulk_in_endpoint[8];
- struct usb_endpoint_descriptor *bulk_out_endpoint[8];
- int control_out_endpoint;
-
- int minor;
- int buffer_size;
- int i;
- int num_interrupt_in = 0;
- int num_bulk_in = 0;
- int num_bulk_out = 0;
-
- interface = intf->cur_altsetting;
- control_out_endpoint = interface->desc.bInterfaceNumber;
-
- /* find the endpoints that we need */
- for (i = 0; i < interface->desc.bNumEndpoints; ++i) {
- endpoint = &interface->endpoint[i].desc;
-
- if ((endpoint->bEndpointAddress & 0x80) &&
- ((endpoint->bmAttributes & 3) == 0x02)) {
- /* we found a bulk in endpoint */
- dbg("found bulk in");
- bulk_in_endpoint[num_bulk_in] = endpoint;
- ++num_bulk_in;
- }
-
- if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
- ((endpoint->bmAttributes & 3) == 0x02)) {
- /* we found a bulk out endpoint */
- dbg("found bulk out");
- bulk_out_endpoint[num_bulk_out] = endpoint;
- ++num_bulk_out;
- }
-
- if ((endpoint->bEndpointAddress & 0x80) &&
- ((endpoint->bmAttributes & 3) == 0x03)) {
- /* we found a interrupt in endpoint */
- dbg("found interrupt in");
- interrupt_in_endpoint[num_interrupt_in] = endpoint;
- ++num_interrupt_in;
- }
- }
-
- /* according to the spec, we can only have 1 bulk_in, 1 bulk_out, and 1 interrupt_in endpoints */
- if ((num_bulk_in != 1) ||
- (num_bulk_out != 1) ||
- (num_interrupt_in != 1)) {
- dbg ("%s - improper number of endpoints. Bluetooth driver not bound.", __FUNCTION__);
- return -EIO;
- }
-
- info("USB Bluetooth converter detected");
-
- for (minor = 0; minor < BLUETOOTH_TTY_MINORS && bluetooth_table[minor]; ++minor)
- ;
- if (bluetooth_table[minor]) {
- err("No more free Bluetooth devices");
- return -ENODEV;
- }
-
- if (!(bluetooth = kmalloc(sizeof(struct usb_bluetooth), GFP_KERNEL))) {
- err("Out of memory");
- return -ENOMEM;
- }
-
- memset(bluetooth, 0, sizeof(struct usb_bluetooth));
-
- bluetooth->magic = USB_BLUETOOTH_MAGIC;
- bluetooth->dev = dev;
- bluetooth->minor = minor;
- INIT_WORK(&bluetooth->work, bluetooth_softint, bluetooth);
- init_MUTEX(&bluetooth->lock);
-
- /* record the interface number for the control out */
- bluetooth->control_out_bInterfaceNum = control_out_endpoint;
-
- /* create our control out urb pool */
- for (i = 0; i < NUM_CONTROL_URBS; ++i) {
- struct urb *urb = usb_alloc_urb(0, GFP_KERNEL);
- if (urb == NULL) {
- err("No free urbs available");
- goto probe_error;
- }
- urb->transfer_buffer = NULL;
- bluetooth->control_urb_pool[i] = urb;
- }
-
- /* set up the endpoint information */
- endpoint = bulk_in_endpoint[0];
- bluetooth->read_urb = usb_alloc_urb (0, GFP_KERNEL);
- if (!bluetooth->read_urb) {
- err("No free urbs available");
- goto probe_error;
- }
- bluetooth->bulk_in_buffer_size = buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
- bluetooth->bulk_in_endpointAddress = endpoint->bEndpointAddress;
- bluetooth->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
- if (!bluetooth->bulk_in_buffer) {
- err("Couldn't allocate bulk_in_buffer");
- goto probe_error;
- }
- usb_fill_bulk_urb(bluetooth->read_urb, dev, usb_rcvbulkpipe(dev, endpoint->bEndpointAddress),
- bluetooth->bulk_in_buffer, buffer_size, bluetooth_read_bulk_callback, bluetooth);
-
- endpoint = bulk_out_endpoint[0];
- bluetooth->bulk_out_endpointAddress = endpoint->bEndpointAddress;
- bluetooth->bulk_out_buffer_size = le16_to_cpu(endpoint->wMaxPacketSize) * 2;
-
- endpoint = interrupt_in_endpoint[0];
- bluetooth->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!bluetooth->interrupt_in_urb) {
- err("No free urbs available");
- goto probe_error;
- }
- bluetooth->interrupt_in_buffer_size = buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
- bluetooth->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
- bluetooth->interrupt_in_interval = endpoint->bInterval;
- bluetooth->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
- if (!bluetooth->interrupt_in_buffer) {
- err("Couldn't allocate interrupt_in_buffer");
- goto probe_error;
- }
- usb_fill_int_urb(bluetooth->interrupt_in_urb, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress),
- bluetooth->interrupt_in_buffer, buffer_size, bluetooth_int_callback,
- bluetooth, endpoint->bInterval);
-
- /* initialize the devfs nodes for this device and let the user know what bluetooths we are bound to */
- tty_register_device (bluetooth_tty_driver, minor, &intf->dev);
- info("Bluetooth converter now attached to ttyUB%d (or usb/ttub/%d for devfs)", minor, minor);
-
- bluetooth_table[minor] = bluetooth;
-
- /* success */
- usb_set_intfdata (intf, bluetooth);
- return 0;
-
-probe_error:
- if (bluetooth->read_urb)
- usb_free_urb (bluetooth->read_urb);
- if (bluetooth->bulk_in_buffer)
- kfree (bluetooth->bulk_in_buffer);
- if (bluetooth->interrupt_in_urb)
- usb_free_urb (bluetooth->interrupt_in_urb);
- if (bluetooth->interrupt_in_buffer)
- kfree (bluetooth->interrupt_in_buffer);
- for (i = 0; i < NUM_CONTROL_URBS; ++i)
- if (bluetooth->control_urb_pool[i]) {
- if (bluetooth->control_urb_pool[i]->transfer_buffer)
- kfree (bluetooth->control_urb_pool[i]->transfer_buffer);
- usb_free_urb (bluetooth->control_urb_pool[i]);
- }
-
- bluetooth_table[minor] = NULL;
-
- /* free up any memory that we allocated */
- kfree (bluetooth);
- return -EIO;
-}
-
-
-static void usb_bluetooth_disconnect(struct usb_interface *intf)
-{
- struct usb_bluetooth *bluetooth = usb_get_intfdata (intf);
- int i;
-
- usb_set_intfdata (intf, NULL);
- if (bluetooth) {
- if ((bluetooth->open_count) && (bluetooth->tty))
- tty_hangup(bluetooth->tty);
-
- bluetooth->open_count = 0;
-
- if (bluetooth->read_urb) {
- usb_kill_urb (bluetooth->read_urb);
- usb_free_urb (bluetooth->read_urb);
- }
- if (bluetooth->bulk_in_buffer)
- kfree (bluetooth->bulk_in_buffer);
-
- if (bluetooth->interrupt_in_urb) {
- usb_kill_urb (bluetooth->interrupt_in_urb);
- usb_free_urb (bluetooth->interrupt_in_urb);
- }
- if (bluetooth->interrupt_in_buffer)
- kfree (bluetooth->interrupt_in_buffer);
-
- tty_unregister_device (bluetooth_tty_driver, bluetooth->minor);
-
- for (i = 0; i < NUM_CONTROL_URBS; ++i) {
- if (bluetooth->control_urb_pool[i]) {
- usb_kill_urb (bluetooth->control_urb_pool[i]);
- if (bluetooth->control_urb_pool[i]->transfer_buffer)
- kfree (bluetooth->control_urb_pool[i]->transfer_buffer);
- usb_free_urb (bluetooth->control_urb_pool[i]);
- }
- }
-
- info("Bluetooth converter now disconnected from ttyUB%d", bluetooth->minor);
-
- bluetooth_table[bluetooth->minor] = NULL;
-
- /* free up any memory that we allocated */
- kfree (bluetooth);
- } else {
- info("device disconnected");
- }
-}
-
-static struct tty_operations bluetooth_ops = {
- .open = bluetooth_open,
- .close = bluetooth_close,
- .write = bluetooth_write,
- .write_room = bluetooth_write_room,
- .ioctl = bluetooth_ioctl,
- .set_termios = bluetooth_set_termios,
- .throttle = bluetooth_throttle,
- .unthrottle = bluetooth_unthrottle,
- .chars_in_buffer = bluetooth_chars_in_buffer,
-};
-
-static int usb_bluetooth_init(void)
-{
- int i;
- int result;
-
- /* Initialize our global data */
- for (i = 0; i < BLUETOOTH_TTY_MINORS; ++i) {
- bluetooth_table[i] = NULL;
- }
-
- info ("USB Bluetooth support registered");
-
- bluetooth_tty_driver = alloc_tty_driver(BLUETOOTH_TTY_MINORS);
- if (!bluetooth_tty_driver)
- return -ENOMEM;
-
- bluetooth_tty_driver->owner = THIS_MODULE;
- bluetooth_tty_driver->driver_name = "usb-bluetooth";
- bluetooth_tty_driver->name = "ttyUB";
- bluetooth_tty_driver->devfs_name = "usb/ttub/";
- bluetooth_tty_driver->major = BLUETOOTH_TTY_MAJOR;
- bluetooth_tty_driver->minor_start = 0;
- bluetooth_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- bluetooth_tty_driver->subtype = SERIAL_TYPE_NORMAL;
- bluetooth_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- bluetooth_tty_driver->init_termios = tty_std_termios;
- bluetooth_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- tty_set_operations(bluetooth_tty_driver, &bluetooth_ops);
- if (tty_register_driver (bluetooth_tty_driver)) {
- err("%s - failed to register tty driver", __FUNCTION__);
- put_tty_driver(bluetooth_tty_driver);
- return -1;
- }
-
- /* register the USB driver */
- result = usb_register(&usb_bluetooth_driver);
- if (result < 0) {
- tty_unregister_driver(bluetooth_tty_driver);
- put_tty_driver(bluetooth_tty_driver);
- err("usb_register failed for the USB bluetooth driver. Error number %d", result);
- return -1;
- }
-
- info(DRIVER_DESC " " DRIVER_VERSION);
-
- return 0;
-}
-
-
-static void usb_bluetooth_exit(void)
-{
- usb_deregister(&usb_bluetooth_driver);
- tty_unregister_driver(bluetooth_tty_driver);
- put_tty_driver(bluetooth_tty_driver);
-}
-
-
-module_init(usb_bluetooth_init);
-module_exit(usb_bluetooth_exit);
-
-/* Module information */
-MODULE_AUTHOR( DRIVER_AUTHOR );
-MODULE_DESCRIPTION( DRIVER_DESC );
-MODULE_LICENSE("GPL");
-
projects / linux-2.6 / commitdiff