--- /dev/null
+/*
+ * bluetooth.c Version 0.5
+ *
+ * Copyright (c) 2000 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (c) 2000 Mark Douglas Corner <mcorner@umich.edu>
+ *
+ * USB Bluetooth driver, based on the Bluetooth Spec version 1.0B
+ *
+ * (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/sched.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/malloc.h>
+#include <linux/fcntl.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+#include <linux/devfs_fs_kernel.h>
+
+#define DEBUG
+#include <linux/usb.h>
+
+/* Module information */
+MODULE_AUTHOR("Greg Kroah-Hartman, Mark Douglas Corner");
+MODULE_DESCRIPTION("USB Bluetooth 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 240 /* Prototype number for now */
+#define BLUETOOTH_TTY_MINORS 8
+
+#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 MIN(a,b) (((a)<(b))?(a):(b))
+
+#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 coresponding tty for this port */
+
+ unsigned char minor; /* the starting minor number for this device */
+ char active; /* someone has this device open */
+ int throttle; /* throttled by tty layer */
+
+ __u8 control_out_bInterfaceNum;
+ struct urb * control_urb_pool[NUM_CONTROL_URBS];
+ devrequest dr[NUM_CONTROL_URBS];
+
+ unsigned char * interrupt_in_buffer;
+ struct urb * interrupt_in_urb;
+
+ unsigned char * bulk_in_buffer;
+ struct urb * read_urb;
+
+ int bulk_out_size;
+ struct urb * write_urb_pool[NUM_BULK_URBS];
+ __u8 bulk_out_endpointAddress;
+
+ wait_queue_head_t write_wait;
+
+ struct tq_struct tqueue; /* task queue 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? */
+};
+
+
+/* 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, int from_user, 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);
+static void bluetooth_ctrl_callback (struct urb *urb);
+static void bluetooth_read_bulk_callback (struct urb *urb);
+static void bluetooth_write_bulk_callback (struct urb *urb);
+
+static void * usb_bluetooth_probe (struct usb_device *dev, unsigned int ifnum);
+static void usb_bluetooth_disconnect (struct usb_device *dev, void *ptr);
+
+
+static struct usb_driver usb_bluetooth_driver = {
+ name: "bluetooth",
+ probe: usb_bluetooth_probe,
+ disconnect: usb_bluetooth_disconnect,
+};
+
+static int bluetooth_refcount;
+static struct tty_driver bluetooth_tty_driver;
+static struct tty_struct * bluetooth_tty[BLUETOOTH_TTY_MINORS];
+static struct termios * bluetooth_termios[BLUETOOTH_TTY_MINORS];
+static struct termios * bluetooth_termios_locked[BLUETOOTH_TTY_MINORS];
+static struct usb_bluetooth *bluetooth_table[BLUETOOTH_TTY_MINORS] = {NULL, };
+
+
+
+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 dont 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_minor (int minor)
+{
+ return bluetooth_table[minor];
+}
+
+
+static int bluetooth_ctrl_msg (struct usb_bluetooth *bluetooth, int request, int value, void *buf, int len)
+{
+ struct urb *urb = NULL;
+ devrequest *dr = NULL;
+ int i;
+ int status;
+
+ dbg (__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 (__FUNCTION__ " - no free urbs");
+ return -ENOMEM;
+ }
+
+ /* free up the last buffer that this urb used */
+ if (urb->transfer_buffer != NULL) {
+ kfree(urb->transfer_buffer);
+ urb->transfer_buffer = NULL;
+ }
+
+ dr->requesttype = BLUETOOTH_CONTROL_REQUEST_TYPE;
+ dr->request = request;
+ dr->value = cpu_to_le16p(&value);
+ dr->index = cpu_to_le16p(&bluetooth->control_out_bInterfaceNum);
+ dr->length = cpu_to_le16p(&len);
+
+ FILL_CONTROL_URB (urb, bluetooth->dev, usb_sndctrlpipe(bluetooth->dev, 0),
+ (unsigned char*)dr, buf, len, bluetooth_ctrl_callback, bluetooth);
+
+ /* send it down the pipe */
+ status = usb_submit_urb(urb);
+ if (status)
+ dbg(__FUNCTION__ " - usb_submit_urb(control) failed with status = %d", status);
+
+ return 0;
+}
+
+
+
+
+
+/*****************************************************************************
+ * Driver tty interface functions
+ *****************************************************************************/
+static int bluetooth_open (struct tty_struct *tty, struct file * filp)
+{
+ struct usb_bluetooth *bluetooth;
+ int result;
+
+ dbg(__FUNCTION__);
+
+ /* initialize the pointer incase something fails */
+ tty->driver_data = NULL;
+
+ /* get the bluetooth object associated with this tty pointer */
+ bluetooth = get_bluetooth_by_minor (MINOR(tty->device));
+
+ if (bluetooth_paranoia_check (bluetooth, __FUNCTION__)) {
+ return -ENODEV;
+ }
+
+ if (bluetooth->active) {
+ dbg (__FUNCTION__ " - device already open");
+ return -EINVAL;
+ }
+
+ /* set up our structure making the tty driver remember our object, and us it */
+ tty->driver_data = bluetooth;
+ bluetooth->tty = tty;
+
+ bluetooth->active = 1;
+
+ /* Reset the packet position counters */
+ bluetooth->int_packet_pos = 0;
+ bluetooth->bulk_packet_pos = 0;
+
+#ifndef BTBUGGYHARDWARE
+ /* Start reading from the device */
+ result = usb_submit_urb(bluetooth->read_urb);
+ if (result)
+ dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed with status %d", result);
+#endif
+ result = usb_submit_urb(bluetooth->interrupt_in_urb);
+ if (result)
+ dbg(__FUNCTION__ " - usb_submit_urb(interrupt in) failed with status %d", result);
+
+ 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__);
+ int i;
+
+ if (!bluetooth) {
+ return;
+ }
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not opened");
+ return;
+ }
+
+ /* shutdown any bulk reads and writes that might be going on */
+ for (i = 0; i < NUM_BULK_URBS; ++i)
+ usb_unlink_urb (bluetooth->write_urb_pool[i]);
+ usb_unlink_urb (bluetooth->read_urb);
+
+ bluetooth->active = 0;
+}
+
+
+static int bluetooth_write (struct tty_struct * tty, int from_user, 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 *new_buffer;
+ const unsigned char *current_position;
+ int status;
+ int bytes_sent;
+ int buffer_size;
+ int i;
+
+ if (!bluetooth) {
+ return -ENODEV;
+ }
+
+ dbg(__FUNCTION__ " - %d byte(s)", count);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not opened");
+ return -EINVAL;
+ }
+
+ if (count == 0) {
+ dbg(__FUNCTION__ " - write request of 0 bytes");
+ return 0;
+ }
+ if (count == 1) {
+ dbg(__FUNCTION__ " - write request only included type %d", buf[0]);
+ return 1;
+ }
+
+#ifdef DEBUG
+ printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ " - length = %d, data = ", count);
+ for (i = 0; i < count; ++i) {
+ printk ("%.2x ", buf[i]);
+ }
+ printk ("\n");
+#endif
+
+ switch (*buf) {
+ /* First byte indicates the type of packet */
+ case CMD_PKT:
+ /* dbg(__FUNCTION__ "- Send cmd_pkt len:%d", count);*/
+
+ if (in_interrupt()){
+ printk("cmd_pkt from interrupt!\n");
+ return count;
+ }
+
+ new_buffer = kmalloc (count-1, GFP_KERNEL);
+
+ if (!new_buffer) {
+ err (__FUNCTION__ "- out of memory.");
+ return -ENOMEM;
+ }
+
+ if (from_user)
+ copy_from_user (new_buffer, buf+1, count-1);
+ else
+ memcpy (new_buffer, buf+1, count-1);
+
+ if (bluetooth_ctrl_msg (bluetooth, 0x00, 0x00, new_buffer, count-1) != 0) {
+ kfree (new_buffer);
+ return 0;
+ }
+
+ /* need to free new_buffer somehow... FIXME */
+ return count;
+
+ case ACL_PKT:
+ current_position = buf;
+ ++current_position;
+ --count;
+ bytes_sent = 0;
+
+ while (count > 0) {
+ urb = NULL;
+
+ /* try to find a free urb in our list */
+ for (i = 0; i < NUM_BULK_URBS; ++i) {
+ if (bluetooth->write_urb_pool[i]->status != -EINPROGRESS) {
+ urb = bluetooth->write_urb_pool[i];
+ break;
+ }
+ }
+ if (urb == NULL) {
+ dbg (__FUNCTION__ " - no free urbs");
+ return bytes_sent;
+ }
+
+ /* free up the last buffer that this urb used */
+ if (urb->transfer_buffer != NULL) {
+ kfree(urb->transfer_buffer);
+ urb->transfer_buffer = NULL;
+ }
+
+ buffer_size = MIN (count, bluetooth->bulk_out_size);
+
+ new_buffer = kmalloc (buffer_size, GFP_KERNEL);
+ if (new_buffer == NULL) {
+ err(__FUNCTION__" no more kernel memory...");
+ return bytes_sent;
+ }
+
+ if (from_user)
+ copy_from_user(new_buffer, current_position, buffer_size);
+ else
+ memcpy (new_buffer, current_position, buffer_size);
+
+ /* build up our urb */
+ FILL_BULK_URB (urb, bluetooth->dev, usb_sndbulkpipe(bluetooth->dev, bluetooth->bulk_out_endpointAddress),
+ new_buffer, buffer_size, bluetooth_write_bulk_callback, bluetooth);
+ urb->transfer_flags |= USB_QUEUE_BULK;
+
+ /* send it down the pipe */
+ status = usb_submit_urb(urb);
+ if (status)
+ dbg(__FUNCTION__ " - usb_submit_urb(write bulk) failed with status = %d", status);
+#ifdef BTBUGGYHARDWARE
+ /* A workaround for the stalled data bug */
+ /* May or may not be needed...*/
+ if (count != 0) {
+ udelay(500);
+ }
+#endif
+ current_position += buffer_size;
+ bytes_sent += buffer_size;
+ count -= buffer_size;
+ }
+
+ return bytes_sent + 1;
+
+ default :
+ dbg(__FUNCTION__" - unsupported (at this time) write type");
+ }
+
+ return 0;
+}
+
+
+static int bluetooth_write_room (struct tty_struct *tty)
+{
+ struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
+ int room = 0;
+ int i;
+
+ if (!bluetooth) {
+ return -ENODEV;
+ }
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < NUM_BULK_URBS; ++i) {
+ if (bluetooth->write_urb_pool[i]->status != -EINPROGRESS) {
+ room += bluetooth->bulk_out_size;
+ }
+ }
+
+ dbg(__FUNCTION__ " - returns %d", room);
+ return room;
+}
+
+
+static int bluetooth_chars_in_buffer (struct tty_struct *tty)
+{
+ struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)tty->driver_data, __FUNCTION__);
+ int chars = 0;
+ int i;
+
+ if (!bluetooth) {
+ return -ENODEV;
+ }
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < NUM_BULK_URBS; ++i) {
+ if (bluetooth->write_urb_pool[i]->status == -EINPROGRESS) {
+ chars += bluetooth->write_urb_pool[i]->transfer_buffer_length;
+ }
+ }
+
+ dbg (__FUNCTION__ " - returns %d", chars);
+ return chars;
+}
+
+
+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(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ return;
+ }
+
+ dbg(__FUNCTION__ " unsupported (at this time)");
+
+ 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(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ return;
+ }
+
+ dbg(__FUNCTION__ " unsupported (at this time)");
+}
+
+
+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(__FUNCTION__ " - cmd 0x%.4x", cmd);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ 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(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ 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__);
+
+ if (!bluetooth) {
+ return;
+ }
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ return;
+ }
+
+ if (bluetooth->read_urb)
+ if (usb_submit_urb(bluetooth->read_urb))
+ dbg (__FUNCTION__ " - usb_submit_urb(read bulk) failed");
+}
+
+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(__FUNCTION__);
+
+ if (!bluetooth->active) {
+ dbg (__FUNCTION__ " - device not open");
+ return;
+ }
+
+ if ((bluetooth->read_urb) && (bluetooth->read_urb->actual_length))
+ usb_unlink_urb(bluetooth->read_urb);
+}
+#endif
+
+
+/*****************************************************************************
+ * urb callback functions
+ *****************************************************************************/
+
+
+static void bluetooth_int_callback (struct urb *urb)
+{
+ 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;
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth) {
+ dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
+ return;
+ }
+
+ if (urb->status) {
+ dbg(__FUNCTION__ " - nonzero int status received: %d", urb->status);
+ return;
+ }
+
+ if (!count) {
+ dbg(__FUNCTION__ " - zero length int");
+ return;
+ }
+
+
+#ifdef DEBUG
+ if (count) {
+ printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ "- length = %d, data = ", 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;
+ 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->int_packet_pos) {
+ bluetooth->int_buffer[0] = EVENT_PKT;
+ bluetooth->int_packet_pos++;
+ }
+
+ if (bluetooth->int_packet_pos + count > EVENT_BUFFER_SIZE) {
+ err(__FUNCTION__ " - exceeded EVENT_BUFFER_SIZE");
+ bluetooth->int_packet_pos = 0;
+ return;
+ }
+
+ 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
+ return;
+
+ if (packet_size + EVENT_HDR_SIZE < bluetooth->int_packet_pos) {
+ err(__FUNCTION__ " - packet was too long");
+ bluetooth->int_packet_pos = 0;
+ return;
+ }
+
+ if (packet_size + EVENT_HDR_SIZE == bluetooth->int_packet_pos){
+ for (i = 0; i < bluetooth->int_packet_pos; ++i)
+ tty_insert_flip_char(bluetooth->tty, bluetooth->int_buffer[i], 0);
+ tty_flip_buffer_push(bluetooth->tty);
+
+ bluetooth->int_packet_pos = 0;
+ }
+}
+
+
+static void bluetooth_ctrl_callback (struct urb *urb)
+{
+ struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth) {
+ dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
+ return;
+ }
+
+ if (urb->status) {
+ dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status);
+ return;
+ }
+}
+
+
+static void bluetooth_read_bulk_callback (struct urb *urb)
+{
+ 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;
+ uint packet_size;
+
+#ifdef BTBUGGYHARDWARE
+ if ((count == 4) && (data[0] == 0x00) && (data[1] == 0x00)
+ && (data[2] == 0x00) && (data[3] == 0x00)) {
+ urb->actual_length = 0;
+ if (usb_submit_urb(urb))
+ dbg(__FUNCTION__ " - failed resubmitting read urb");
+
+ return;
+ }
+#endif
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth) {
+ dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
+ goto exit;
+ }
+
+ if (urb->status) {
+ dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status);
+ goto exit;
+ }
+
+ if (!count) {
+ dbg(__FUNCTION__ " - zero length read bulk");
+ goto exit;
+ }
+
+#ifdef DEBUG
+ if (count) {
+ printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ "- length = %d, data = ", count);
+ for (i = 0; i < count; ++i) {
+ printk ("%.2x ", data[i]);
+ }
+ printk ("\n");
+ }
+#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(__FUNCTION__ " - exceeded ACL_BUFFER_SIZE");
+ 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(__FUNCTION__ " - packet was too long");
+ 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)
+ tty_insert_flip_char(bluetooth->tty, bluetooth->bulk_buffer[i], 0);
+ tty_flip_buffer_push(bluetooth->tty);
+ bluetooth->bulk_packet_pos = 0;
+ }
+
+exit:
+ if (usb_submit_urb(urb))
+ dbg(__FUNCTION__ " - failed resubmitting read urb");
+
+ return;
+}
+
+
+static void bluetooth_write_bulk_callback (struct urb *urb)
+{
+ struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)urb->context, __FUNCTION__);
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth) {
+ dbg(__FUNCTION__ " - bad bluetooth pointer, exiting");
+ return;
+ }
+
+ if (urb->status) {
+ dbg(__FUNCTION__ " - nonzero write bulk status received: %d", urb->status);
+ return;
+ }
+
+ /* wake up our little function to let the tty layer know that something happened */
+ queue_task(&bluetooth->tqueue, &tq_immediate);
+ mark_bh(IMMEDIATE_BH);
+ return;
+}
+
+
+static void bluetooth_softint(void *private)
+{
+ struct usb_bluetooth *bluetooth = get_usb_bluetooth ((struct usb_bluetooth *)private, __FUNCTION__);
+ struct tty_struct *tty;
+
+ dbg(__FUNCTION__);
+
+ if (!bluetooth) {
+ return;
+ }
+
+ tty = bluetooth->tty;
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
+ dbg(__FUNCTION__ " - write wakeup call.");
+ (tty->ldisc.write_wakeup)(tty);
+ }
+
+ wake_up_interruptible(&tty->write_wait);
+}
+
+
+static void * usb_bluetooth_probe(struct usb_device *dev, unsigned int ifnum)
+{
+ struct usb_bluetooth *bluetooth = NULL;
+ struct usb_interface_descriptor *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;
+
+ /* see if this device has the proper class signature */
+ if ((dev->descriptor.bDeviceClass != WIRELESS_CLASS_CODE) ||
+ (dev->descriptor.bDeviceSubClass != RF_SUBCLASS_CODE) ||
+ (dev->descriptor.bDeviceProtocol != BLUETOOTH_PROGRAMMING_PROTOCOL_CODE)) {
+ dbg (__FUNCTION__ " - class signature %d, %d, %d did not match",
+ dev->descriptor.bDeviceClass, dev->descriptor.bDeviceSubClass,
+ dev->descriptor.bDeviceProtocol);
+ return NULL;
+ }
+
+ interface = &dev->actconfig->interface[ifnum].altsetting[0];
+ control_out_endpoint = interface->bInterfaceNumber;
+
+ /* find the endpoints that we need */
+ for (i = 0; i < interface->bNumEndpoints; ++i) {
+ endpoint = &interface->endpoint[i];
+
+ 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 (__FUNCTION__ " - improper number of endpoints. Bluetooth driver not bound.");
+ return NULL;
+ }
+
+ MOD_INC_USE_COUNT;
+ 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");
+ MOD_DEC_USE_COUNT;
+ return NULL;
+ }
+
+ if (!(bluetooth = kmalloc(sizeof(struct usb_bluetooth), GFP_KERNEL))) {
+ err("Out of memory");
+ MOD_DEC_USE_COUNT;
+ return NULL;
+ }
+
+ memset(bluetooth, 0, sizeof(struct usb_bluetooth));
+
+ bluetooth->magic = USB_BLUETOOTH_MAGIC;
+ bluetooth->dev = dev;
+ bluetooth->minor = minor;
+ bluetooth->tqueue.routine = bluetooth_softint;
+ bluetooth->tqueue.data = bluetooth;
+
+ /* 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);
+ 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);
+ if (!bluetooth->read_urb) {
+ err("No free urbs available");
+ goto probe_error;
+ }
+ buffer_size = endpoint->wMaxPacketSize;
+ bluetooth->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
+ if (!bluetooth->bulk_in_buffer) {
+ err("Couldn't allocate bulk_in_buffer");
+ goto probe_error;
+ }
+ 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;
+
+ /* create our write urb pool */
+ for (i = 0; i < NUM_BULK_URBS; ++i) {
+ struct urb *urb = usb_alloc_urb(0);
+ if (urb == NULL) {
+ err("No free urbs available");
+ goto probe_error;
+ }
+ urb->transfer_buffer = NULL;
+ bluetooth->write_urb_pool[i] = urb;
+ }
+
+ bluetooth->bulk_out_size = endpoint->wMaxPacketSize * 2;
+
+ endpoint = interrupt_in_endpoint[0];
+ bluetooth->interrupt_in_urb = usb_alloc_urb(0);
+ if (!bluetooth->interrupt_in_urb) {
+ err("No free urbs available");
+ goto probe_error;
+ }
+ buffer_size = endpoint->wMaxPacketSize;
+ bluetooth->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
+ if (!bluetooth->interrupt_in_buffer) {
+ err("Couldn't allocate interrupt_in_buffer");
+ goto probe_error;
+ }
+ 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_devfs (&bluetooth_tty_driver, 0, minor);
+ info("Bluetooth converter now attached to ttyBLUE%d (or usb/ttblue/%d for devfs)", minor, minor);
+
+ bluetooth_table[minor] = bluetooth;
+
+ return bluetooth; /* success */
+
+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_BULK_URBS; ++i)
+ if (bluetooth->write_urb_pool[i])
+ usb_free_urb (bluetooth->write_urb_pool[i]);
+ for (i = 0; i < NUM_CONTROL_URBS; ++i)
+ if (bluetooth->control_urb_pool[i])
+ usb_free_urb (bluetooth->control_urb_pool[i]);
+
+ bluetooth_table[minor] = NULL;
+
+ /* free up any memory that we allocated */
+ kfree (bluetooth);
+ MOD_DEC_USE_COUNT;
+ return NULL;
+}
+
+
+static void usb_bluetooth_disconnect(struct usb_device *dev, void *ptr)
+{
+ struct usb_bluetooth *bluetooth = (struct usb_bluetooth *) ptr;
+ int i;
+
+ if (bluetooth) {
+ if ((bluetooth->active) && (bluetooth->tty))
+ tty_hangup(bluetooth->tty);
+
+ bluetooth->active = 0;
+
+ if (bluetooth->read_urb) {
+ usb_unlink_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_unlink_urb (bluetooth->interrupt_in_urb);
+ usb_free_urb (bluetooth->interrupt_in_urb);
+ }
+ if (bluetooth->interrupt_in_buffer)
+ kfree (bluetooth->interrupt_in_buffer);
+
+ tty_unregister_devfs (&bluetooth_tty_driver, bluetooth->minor);
+
+ for (i = 0; i < NUM_BULK_URBS; ++i) {
+ if (bluetooth->write_urb_pool[i]) {
+ usb_unlink_urb (bluetooth->write_urb_pool[i]);
+ if (bluetooth->write_urb_pool[i]->transfer_buffer)
+ kfree (bluetooth->write_urb_pool[i]->transfer_buffer);
+ usb_free_urb (bluetooth->write_urb_pool[i]);
+ }
+ }
+ for (i = 0; i < NUM_CONTROL_URBS; ++i) {
+ if (bluetooth->control_urb_pool[i]) {
+ usb_unlink_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 ttyBLUE%d", bluetooth->minor);
+
+ bluetooth_table[bluetooth->minor] = NULL;
+
+ /* free up any memory that we allocated */
+ kfree (bluetooth);
+
+ } else {
+ info("device disconnected");
+ }
+
+ MOD_DEC_USE_COUNT;
+}
+
+
+static struct tty_driver bluetooth_tty_driver = {
+ magic: TTY_DRIVER_MAGIC,
+ driver_name: "usb-bluetooth",
+ name: "usb/ttblue/%d",
+ major: BLUETOOTH_TTY_MAJOR,
+ minor_start: 0,
+ num: BLUETOOTH_TTY_MINORS,
+ type: TTY_DRIVER_TYPE_SERIAL,
+ subtype: SERIAL_TYPE_NORMAL,
+ flags: TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
+
+ refcount: &bluetooth_refcount,
+ table: bluetooth_tty,
+ termios: bluetooth_termios,
+ termios_locked: bluetooth_termios_locked,
+
+ 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,
+};
+
+
+int usb_bluetooth_init(void)
+{
+ int i;
+ int result;
+
+ /* Initalize our global data */
+ for (i = 0; i < BLUETOOTH_TTY_MINORS; ++i) {
+ bluetooth_table[i] = NULL;
+ }
+
+ info ("USB Bluetooth support registered");
+
+ /* register the tty driver */
+ bluetooth_tty_driver.init_termios = tty_std_termios;
+ bluetooth_tty_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ if (tty_register_driver (&bluetooth_tty_driver)) {
+ err(__FUNCTION__ " - failed to register tty driver");
+ return -1;
+ }
+
+ /* register the USB driver */
+ result = usb_register(&usb_bluetooth_driver);
+ if (result < 0) {
+ tty_unregister_driver(&bluetooth_tty_driver);
+ err("usb_register failed for the USB bluetooth driver. Error number %d", result);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+void usb_bluetooth_exit(void)
+{
+ usb_deregister(&usb_bluetooth_driver);
+ tty_unregister_driver(&bluetooth_tty_driver);
+}
+
+
+module_init(usb_bluetooth_init);
+module_exit(usb_bluetooth_exit);
+
+
projects / history.git / commitdiff