diff options
Diffstat (limited to 'drivers/usb/class/bluetty.c')
| -rw-r--r-- | drivers/usb/class/bluetty.c | 1279 |
1 files changed, 1279 insertions, 0 deletions
diff --git a/drivers/usb/class/bluetty.c b/drivers/usb/class/bluetty.c new file mode 100644 index 000000000000..6bac65e0ade7 --- /dev/null +++ b/drivers/usb/class/bluetty.c @@ -0,0 +1,1279 @@ +/* + * 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"); + |
