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Commit 2dbbab6f authored by Maksim Krasnyanskiy's avatar Maksim Krasnyanskiy
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[Bluetooth] HCI USB driver update. Support for SCO over HCI USB. 

URB and buffer managment rewrite.
parent 0d8865bd
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Showing with 572 additions and 357 deletions
drivers/bluetooth/Kconfig
View file @ 2dbbab6f
......@@ -13,11 +13,18 @@ config BT_HCIUSB
Say Y here to compile support for Bluetooth USB devices into the
kernel or say M to compile it as module (hci_usb).
config BT_USB_SCO
bool "SCO over HCI USB support"
depends on BT_HCIUSB
help
This option enables the SCO support in the HCI USB driver. You need this
to transmit voice data with your Bluetooth USB device.
Say Y here to compile support for SCO over HCI USB.
config BT_USB_ZERO_PACKET
bool "USB zero packet support"
depends on BT_HCIUSB
help
Support for USB zero packets.
This option is provided only as a work around for buggy Bluetooth USB
devices. Do _not_ enable it unless you know for sure that your device
requires zero packets.
......
drivers/bluetooth/hci_usb.c
View file @ 2dbbab6f
/*
BlueZ - Bluetooth protocol stack for Linux
HCI USB driver for Linux Bluetooth protocol stack (BlueZ)
Copyright (C) 2000-2001 Qualcomm Incorporated
Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation;
......@@ -23,20 +24,17 @@
*/
/*
* Bluetooth HCI USB driver.
* Based on original USB Bluetooth driver for Linux kernel
* Copyright (c) 2000 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (c) 2000 Mark Douglas Corner <mcorner@umich.edu>
*
* $Id: hci_usb.c,v 1.8 2002/07/18 17:23:09 maxk Exp $
*/
#define VERSION "2.1"
#define VERSION "2.4"
#include <linux/config.h>
#include <linux/module.h>
#define __KERNEL_SYSCALLS__
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/init.h>
......@@ -49,17 +47,15 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/kmod.h>
#include <linux/usb.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "hci_usb.h"
#define HCI_MAX_PENDING (HCI_MAX_BULK_RX + HCI_MAX_BULK_TX + 1)
#include "hci_usb.h"
#ifndef CONFIG_BT_HCIUSB_DEBUG
#ifndef HCI_USB_DEBUG
#undef BT_DBG
#define BT_DBG( A... )
#undef BT_DMP
......@@ -67,8 +63,8 @@
#endif
#ifndef CONFIG_BT_USB_ZERO_PACKET
#undef URB_ZERO_PACKET
#define URB_ZERO_PACKET 0
#undef USB_ZERO_PACKET
#define USB_ZERO_PACKET 0
#endif
static struct usb_driver hci_usb_driver;
......@@ -80,6 +76,9 @@ static struct usb_device_id bluetooth_ids[] = {
/* Ericsson with non-standard id */
{ USB_DEVICE(0x0bdb, 0x1002) },
/* Bluetooth Ultraport Module from IBM */
{ USB_DEVICE(0x04bf, 0x030a) },
{ } /* Terminating entry */
};
......@@ -92,108 +91,196 @@ static struct usb_device_id ignore_ids[] = {
{ } /* Terminating entry */
};
static void hci_usb_interrupt(struct urb *urb, struct pt_regs *regs);
struct _urb *_urb_alloc(int isoc, int gfp)
{
struct _urb *_urb = kmalloc(sizeof(struct _urb) +
sizeof(struct usb_iso_packet_descriptor) * isoc, gfp);
if (_urb) {
memset(_urb, 0, sizeof(*_urb));
_urb->urb.count = (atomic_t)ATOMIC_INIT(1);
spin_lock_init(&_urb->urb.lock);
}
return _urb;
}
struct _urb *_urb_dequeue(struct _urb_queue *q)
{
struct _urb *_urb = NULL;
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
{
struct list_head *head = &q->head;
struct list_head *next = head->next;
if (next != head) {
_urb = list_entry(next, struct _urb, list);
list_del(next); _urb->queue = NULL;
}
}
spin_unlock_irqrestore(&q->lock, flags);
return _urb;
}
static void hci_usb_rx_complete(struct urb *urb, struct pt_regs *regs);
static void hci_usb_tx_complete(struct urb *urb, struct pt_regs *regs);
static struct urb *hci_usb_get_completed(struct hci_usb *husb)
#define __pending_tx(husb, type) (&husb->pending_tx[type-1])
#define __pending_q(husb, type) (&husb->pending_q[type-1])
#define __completed_q(husb, type) (&husb->completed_q[type-1])
#define __transmit_q(husb, type) (&husb->transmit_q[type-1])
#define __reassembly(husb, type) (husb->reassembly[type-1])
static inline struct _urb *__get_completed(struct hci_usb *husb, int type)
{
struct sk_buff *skb;
struct urb *urb = NULL;
return _urb_dequeue(__completed_q(husb, type));
}
skb = skb_dequeue(&husb->completed_q);
if (skb) {
urb = ((struct hci_usb_scb *) skb->cb)->urb;
kfree_skb(skb);
}
#ifdef CONFIG_BT_USB_SCO
static void __fill_isoc_desc(struct urb *urb, int len, int mtu)
{
int offset = 0, i;
BT_DBG("%s urb %p", husb->hdev.name, urb);
return urb;
BT_DBG("len %d mtu %d", len, mtu);
for (i=0; i < HCI_MAX_ISOC_FRAMES && len >= mtu; i++, offset += mtu, len -= mtu) {
urb->iso_frame_desc[i].offset = offset;
urb->iso_frame_desc[i].length = mtu;
BT_DBG("desc %d offset %d len %d", i, offset, mtu);
}
if (len && i < HCI_MAX_ISOC_FRAMES) {
urb->iso_frame_desc[i].offset = offset;
urb->iso_frame_desc[i].length = len;
BT_DBG("desc %d offset %d len %d", i, offset, len);
i++;
}
urb->number_of_packets = i;
}
#endif
static int hci_usb_enable_intr(struct hci_usb *husb)
static int hci_usb_intr_rx_submit(struct hci_usb *husb)
{
struct _urb *_urb;
struct urb *urb;
int pipe, size;
int err, pipe, interval, size;
void *buf;
BT_DBG("%s", husb->hdev.name);
if (!(urb = usb_alloc_urb(0, GFP_KERNEL)))
size = husb->intr_in_ep->desc.wMaxPacketSize;
buf = kmalloc(size, GFP_ATOMIC);
if (!buf)
return -ENOMEM;
if (!(buf = kmalloc(HCI_MAX_EVENT_SIZE, GFP_KERNEL))) {
usb_free_urb(urb);
_urb = _urb_alloc(0, GFP_ATOMIC);
if (!_urb) {
kfree(buf);
return -ENOMEM;
}
_urb->type = HCI_EVENT_PKT;
_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
husb->intr_urb = urb;
pipe = usb_rcvintpipe(husb->udev, husb->intr_ep);
size = usb_maxpacket(husb->udev, pipe, usb_pipeout(pipe));
usb_fill_int_urb(urb, husb->udev, pipe, buf, size,
hci_usb_interrupt, husb, husb->intr_interval);
urb = &_urb->urb;
pipe = usb_rcvintpipe(husb->udev, husb->intr_in_ep->desc.bEndpointAddress);
interval = husb->intr_in_ep->desc.bInterval;
usb_fill_int_urb(urb, husb->udev, pipe, buf, size, hci_usb_rx_complete, husb, interval);
return usb_submit_urb(urb, GFP_KERNEL);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
BT_ERR("%s intr rx submit failed urb %p err %d",
husb->hdev.name, urb, err);
_urb_unlink(_urb);
_urb_free(_urb);
kfree(buf);
}
return err;
}
static int hci_usb_disable_intr(struct hci_usb *husb)
static int hci_usb_bulk_rx_submit(struct hci_usb *husb)
{
struct urb *urb = husb->intr_urb;
struct sk_buff *skb;
BT_DBG("%s", husb->hdev.name);
struct _urb *_urb;
struct urb *urb;
int err, pipe, size = HCI_MAX_FRAME_SIZE;
void *buf;
usb_unlink_urb(urb); usb_free_urb(urb);
husb->intr_urb = NULL;
buf = kmalloc(size, GFP_ATOMIC);
if (!buf)
return -ENOMEM;
skb = husb->intr_skb;
if (skb) {
husb->intr_skb = NULL;
kfree_skb(skb);
_urb = _urb_alloc(0, GFP_ATOMIC);
if (!_urb) {
kfree(buf);
return -ENOMEM;
}
_urb->type = HCI_ACLDATA_PKT;
_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
return 0;
urb = &_urb->urb;
pipe = usb_rcvbulkpipe(husb->udev, husb->bulk_in_ep->desc.bEndpointAddress);
usb_fill_bulk_urb(urb, husb->udev, pipe, buf, size, hci_usb_rx_complete, husb);
urb->transfer_flags = 0;
BT_DBG("%s urb %p", husb->hdev.name, urb);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
BT_ERR("%s bulk rx submit failed urb %p err %d",
husb->hdev.name, urb, err);
_urb_unlink(_urb);
_urb_free(_urb);
kfree(buf);
}
return err;
}
static int hci_usb_rx_submit(struct hci_usb *husb, struct urb *urb)
#ifdef CONFIG_BT_USB_SCO
static int hci_usb_isoc_rx_submit(struct hci_usb *husb)
{
struct hci_usb_scb *scb;
struct sk_buff *skb;
int pipe, size, err;
struct _urb *_urb;
struct urb *urb;
int err, mtu, size;
void *buf;
if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
return -ENOMEM;
mtu = husb->isoc_in_ep->desc.wMaxPacketSize;
size = mtu * HCI_MAX_ISOC_FRAMES;
size = HCI_MAX_FRAME_SIZE;
buf = kmalloc(size, GFP_ATOMIC);
if (!buf)
return -ENOMEM;
if (!(skb = bt_skb_alloc(size, GFP_ATOMIC))) {
usb_free_urb(urb);
_urb = _urb_alloc(HCI_MAX_ISOC_FRAMES, GFP_ATOMIC);
if (!_urb) {
kfree(buf);
return -ENOMEM;
}
BT_DBG("%s urb %p", husb->hdev.name, urb);
_urb->type = HCI_SCODATA_PKT;
_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
skb->dev = (void *) &husb->hdev;
skb->pkt_type = HCI_ACLDATA_PKT;
urb = &_urb->urb;
scb = (struct hci_usb_scb *) skb->cb;
scb->urb = urb;
urb->context = husb;
urb->dev = husb->udev;
urb->pipe = usb_rcvisocpipe(husb->udev, husb->isoc_in_ep->desc.bEndpointAddress);
urb->complete = hci_usb_rx_complete;
pipe = usb_rcvbulkpipe(husb->udev, husb->bulk_in_ep);
urb->transfer_buffer_length = size;
urb->transfer_buffer = buf;
urb->transfer_flags = URB_ISO_ASAP;
usb_fill_bulk_urb(urb, husb->udev, pipe, skb->data, size, hci_usb_rx_complete, skb);
__fill_isoc_desc(urb, size, mtu);
BT_DBG("%s urb %p", husb->hdev.name, urb);
skb_queue_tail(&husb->pending_q, skb);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
BT_ERR("%s bulk rx submit failed urb %p err %d",
BT_ERR("%s isoc rx submit failed urb %p err %d",
husb->hdev.name, urb, err);
skb_unlink(skb);
usb_free_urb(urb);
_urb_unlink(_urb);
_urb_free(_urb);
kfree(buf);
}
return err;
}
#endif
/* Initialize device */
static int hci_usb_open(struct hci_dev *hdev)
......@@ -209,13 +296,17 @@ static int hci_usb_open(struct hci_dev *hdev)
write_lock_irqsave(&husb->completion_lock, flags);
err = hci_usb_enable_intr(husb);
err = hci_usb_intr_rx_submit(husb);
if (!err) {
for (i = 0; i < HCI_MAX_BULK_RX; i++)
hci_usb_rx_submit(husb, NULL);
} else
hci_usb_bulk_rx_submit(husb);
#ifdef CONFIG_BT_USB_SCO
hci_usb_isoc_rx_submit(husb);
#endif
} else {
clear_bit(HCI_RUNNING, &hdev->flags);
}
write_unlock_irqrestore(&husb->completion_lock, flags);
return err;
......@@ -225,29 +316,52 @@ static int hci_usb_open(struct hci_dev *hdev)
static int hci_usb_flush(struct hci_dev *hdev)
{
struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
int i;
BT_DBG("%s", hdev->name);
skb_queue_purge(&husb->cmd_q);
skb_queue_purge(&husb->acl_q);
for (i=0; i < 4; i++)
skb_queue_purge(&husb->transmit_q[i]);
return 0;
}
static inline void hci_usb_unlink_urbs(struct hci_usb *husb)
static void hci_usb_unlink_urbs(struct hci_usb *husb)
{
struct sk_buff *skb;
struct urb *urb;
int i;
BT_DBG("%s", husb->hdev.name);
while ((skb = skb_dequeue(&husb->pending_q))) {
urb = ((struct hci_usb_scb *) skb->cb)->urb;
usb_unlink_urb(urb);
kfree_skb(skb);
}
for (i=0; i < 4; i++) {
struct _urb *_urb;
struct urb *urb;
/* Kill pending requests */
while ((_urb = _urb_dequeue(&husb->pending_q[i]))) {
urb = &_urb->urb;
BT_DBG("%s unlinking _urb %p type %d urb %p",
husb->hdev.name, _urb, _urb->type, urb);
usb_unlink_urb(urb);
_urb_queue_tail(__completed_q(husb, _urb->type), _urb);
}
while ((urb = hci_usb_get_completed(husb)))
usb_free_urb(urb);
/* Release completed requests */
while ((_urb = _urb_dequeue(&husb->completed_q[i]))) {
urb = &_urb->urb;
BT_DBG("%s freeing _urb %p type %d urb %p",
husb->hdev.name, _urb, _urb->type, urb);
if (urb->setup_packet)
kfree(urb->setup_packet);
if (urb->transfer_buffer)
kfree(urb->transfer_buffer);
_urb_free(_urb);
}
/* Release reassembly buffers */
if (husb->reassembly[i]) {
kfree_skb(husb->reassembly[i]);
husb->reassembly[i] = NULL;
}
}
}
/* Close device */
......@@ -263,7 +377,6 @@ static int hci_usb_close(struct hci_dev *hdev)
write_lock_irqsave(&husb->completion_lock, flags);
hci_usb_disable_intr(husb);
hci_usb_unlink_urbs(husb);
hci_usb_flush(hdev);
......@@ -271,104 +384,157 @@ static int hci_usb_close(struct hci_dev *hdev)
return 0;
}
static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
static int __tx_submit(struct hci_usb *husb, struct _urb *_urb)
{
struct hci_usb_scb *scb = (void *) skb->cb;
struct urb *urb = hci_usb_get_completed(husb);
struct usb_ctrlrequest *cr;
int pipe, err;
if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
return -ENOMEM;
struct urb *urb = &_urb->urb;
int err;
if (!(cr = kmalloc(sizeof(*cr), GFP_ATOMIC))) {
usb_free_urb(urb);
return -ENOMEM;
}
BT_DBG("%s urb %p type %d", husb->hdev.name, urb, _urb->type);
pipe = usb_sndctrlpipe(husb->udev, 0);
_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
BT_ERR("%s tx submit failed urb %p type %d err %d",
husb->hdev.name, urb, _urb->type, err);
_urb_unlink(_urb);
_urb_queue_tail(__completed_q(husb, _urb->type), _urb);
} else
atomic_inc(__pending_tx(husb, _urb->type));
cr->bRequestType = HCI_CTRL_REQ;
cr->bRequest = 0;
cr->wIndex = 0;
cr->wValue = 0;
cr->wLength = __cpu_to_le16(skb->len);
return err;
}
usb_fill_control_urb(urb, husb->udev, pipe, (void *) cr,
skb->data, skb->len, hci_usb_tx_complete, skb);
static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
{
struct _urb *_urb = __get_completed(husb, skb->pkt_type);
struct usb_ctrlrequest *dr;
struct urb *urb;
BT_DBG("%s urb %p len %d", husb->hdev.name, urb, skb->len);
if (!_urb) {
_urb = _urb_alloc(0, GFP_ATOMIC);
if (!_urb)
return -ENOMEM;
_urb->type = skb->pkt_type;
scb->urb = urb;
dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
if (!dr) {
_urb_free(_urb);
return -ENOMEM;
}
} else
dr = (void *) _urb->urb.setup_packet;
skb_queue_tail(&husb->pending_q, skb);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
BT_ERR("%s ctrl tx submit failed urb %p err %d",
husb->hdev.name, urb, err);
skb_unlink(skb);
usb_free_urb(urb); kfree(cr);
}
return err;
dr->bRequestType = HCI_CTRL_REQ;
dr->bRequest = 0;
dr->wIndex = 0;
dr->wValue = 0;
dr->wLength = __cpu_to_le16(skb->len);
urb = &_urb->urb;
usb_fill_control_urb(urb, husb->udev, usb_sndctrlpipe(husb->udev, 0),
(void *) dr, skb->data, skb->len, hci_usb_tx_complete, husb);
BT_DBG("%s skb %p len %d", husb->hdev.name, skb, skb->len);
_urb->priv = skb;
return __tx_submit(husb, _urb);
}
static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
{
struct hci_usb_scb *scb = (void *) skb->cb;
struct urb *urb = hci_usb_get_completed(husb);
int pipe, err;
struct _urb *_urb = __get_completed(husb, skb->pkt_type);
struct urb *urb;
int pipe;
if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
return -ENOMEM;
if (!_urb) {
_urb = _urb_alloc(0, GFP_ATOMIC);
if (!_urb)
return -ENOMEM;
_urb->type = skb->pkt_type;
}
pipe = usb_sndbulkpipe(husb->udev, husb->bulk_out_ep);
usb_fill_bulk_urb(urb, husb->udev, pipe, skb->data, skb->len,
hci_usb_tx_complete, skb);
urb->transfer_flags = URB_ZERO_PACKET;
urb = &_urb->urb;
pipe = usb_sndbulkpipe(husb->udev, husb->bulk_out_ep->desc.bEndpointAddress);
usb_fill_bulk_urb(urb, husb->udev, pipe, skb->data, skb->len,
hci_usb_tx_complete, husb);
urb->transfer_flags = USB_ZERO_PACKET;
BT_DBG("%s urb %p len %d", husb->hdev.name, urb, skb->len);
BT_DBG("%s skb %p len %d", husb->hdev.name, skb, skb->len);
scb->urb = urb;
_urb->priv = skb;
return __tx_submit(husb, _urb);
}
skb_queue_tail(&husb->pending_q, skb);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
BT_ERR("%s bulk tx submit failed urb %p err %d",
husb->hdev.name, urb, err);
skb_unlink(skb);
usb_free_urb(urb);
#ifdef CONFIG_BT_USB_SCO
static inline int hci_usb_send_isoc(struct hci_usb *husb, struct sk_buff *skb)
{
struct _urb *_urb = __get_completed(husb, skb->pkt_type);
struct urb *urb;
if (!_urb) {
_urb = _urb_alloc(HCI_MAX_ISOC_FRAMES, GFP_ATOMIC);
if (!_urb)
return -ENOMEM;
_urb->type = skb->pkt_type;
}
return err;
BT_DBG("%s skb %p len %d", husb->hdev.name, skb, skb->len);
urb = &_urb->urb;
urb->context = husb;
urb->dev = husb->udev;
urb->pipe = usb_sndisocpipe(husb->udev, husb->isoc_out_ep->desc.bEndpointAddress);
urb->complete = hci_usb_tx_complete;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = skb->data;
urb->transfer_buffer_length = skb->len;
__fill_isoc_desc(urb, skb->len, husb->isoc_out_ep->desc.wMaxPacketSize);
_urb->priv = skb;
return __tx_submit(husb, _urb);
}
#endif
static void hci_usb_tx_process(struct hci_usb *husb)
{
struct sk_buff_head *q;
struct sk_buff *skb;
BT_DBG("%s", husb->hdev.name);
do {
clear_bit(HCI_USB_TX_WAKEUP, &husb->state);
/* Process command queue */
q = __transmit_q(husb, HCI_COMMAND_PKT);
if (!atomic_read(__pending_tx(husb, HCI_COMMAND_PKT)) &&
(skb = skb_dequeue(q))) {
if (hci_usb_send_ctrl(husb, skb) < 0)
skb_queue_head(q, skb);
}
#ifdef CONFIG_BT_USB_SCO
/* Process SCO queue */
q = __transmit_q(husb, HCI_SCODATA_PKT);
if (!atomic_read(__pending_tx(husb, HCI_SCODATA_PKT)) &&
(skb = skb_dequeue(q))) {
if (hci_usb_send_isoc(husb, skb) < 0)
skb_queue_head(q, skb);
}
#endif
/* Process ACL queue */
while (skb_queue_len(&husb->pending_q) < HCI_MAX_PENDING &&
(skb = skb_dequeue(&husb->acl_q))) {
q = __transmit_q(husb, HCI_ACLDATA_PKT);
while (atomic_read(__pending_tx(husb, HCI_ACLDATA_PKT)) < HCI_MAX_BULK_TX &&
(skb = skb_dequeue(q))) {
if (hci_usb_send_bulk(husb, skb) < 0) {
skb_queue_head(&husb->acl_q, skb);
skb_queue_head(q, skb);
break;
}
}
/* Process command queue */
if (!test_bit(HCI_USB_CTRL_TX, &husb->state) &&
(skb = skb_dequeue(&husb->cmd_q)) != NULL) {
set_bit(HCI_USB_CTRL_TX, &husb->state);
if (hci_usb_send_ctrl(husb, skb) < 0) {
skb_queue_head(&husb->cmd_q, skb);
clear_bit(HCI_USB_CTRL_TX, &husb->state);
}
}
} while(test_bit(HCI_USB_TX_WAKEUP, &husb->state));
}
......@@ -383,7 +549,7 @@ static inline void hci_usb_tx_wakeup(struct hci_usb *husb)
}
/* Send frames from HCI layer */
int hci_usb_send_frame(struct sk_buff *skb)
static int hci_usb_send_frame(struct sk_buff *skb)
{
struct hci_dev *hdev = (struct hci_dev *) skb->dev;
struct hci_usb *husb;
......@@ -396,247 +562,227 @@ int hci_usb_send_frame(struct sk_buff *skb)
if (!test_bit(HCI_RUNNING, &hdev->flags))
return -EBUSY;
husb = (struct hci_usb *) hdev->driver_data;
BT_DBG("%s type %d len %d", hdev->name, skb->pkt_type, skb->len);
read_lock(&husb->completion_lock);
husb = (struct hci_usb *) hdev->driver_data;
switch (skb->pkt_type) {
case HCI_COMMAND_PKT:
skb_queue_tail(&husb->cmd_q, skb);
hdev->stat.cmd_tx++;
break;
case HCI_ACLDATA_PKT:
skb_queue_tail(&husb->acl_q, skb);
hdev->stat.acl_tx++;
break;
#ifdef CONFIG_BT_USB_SCO
case HCI_SCODATA_PKT:
hdev->stat.sco_tx++;
break;
#endif
default:
kfree_skb(skb);
break;
return 0;
}
read_lock(&husb->completion_lock);
skb_queue_tail(__transmit_q(husb, skb->pkt_type), skb);
hci_usb_tx_wakeup(husb);
read_unlock(&husb->completion_lock);
return 0;
}
static void hci_usb_interrupt(struct urb *urb, struct pt_regs *regs)
static inline int __recv_frame(struct hci_usb *husb, int type, void *data, int count)
{
struct hci_usb *husb = (void *) urb->context;
struct hci_usb_scb *scb;
struct sk_buff *skb;
struct hci_event_hdr *eh;
__u8 *data = urb->transfer_buffer;
int count = urb->actual_length;
int len = HCI_EVENT_HDR_SIZE;
int status;
BT_DBG("%s type %d data %p count %d", husb->hdev.name, type, data, count);
BT_DBG("%s urb %p count %d", husb->hdev.name, urb, count);
husb->hdev.stat.byte_rx += count;
if (!test_bit(HCI_RUNNING, &husb->hdev.flags))
return;
while (count) {
struct sk_buff *skb = __reassembly(husb, type);
struct { int expect; } *scb;
int len = 0;
if (!skb) {
/* Start of the frame */
switch (type) {
case HCI_EVENT_PKT:
if (count >= HCI_EVENT_HDR_SIZE) {
struct hci_event_hdr *h = data;
len = HCI_EVENT_HDR_SIZE + h->plen;
} else
return -EILSEQ;
break;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
BT_DBG("%s urb shutting down with status: %d",
husb->hdev.name, urb->status);
return;
default:
BT_ERR("%s nonzero urb status received: %d",
husb->hdev.name, urb->status);
goto exit;
}
case HCI_ACLDATA_PKT:
if (count >= HCI_ACL_HDR_SIZE) {
struct hci_acl_hdr *h = data;
len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen);
} else
return -EILSEQ;
break;
#ifdef CONFIG_BT_USB_SCO
case HCI_SCODATA_PKT:
if (count >= HCI_SCO_HDR_SIZE) {
struct hci_sco_hdr *h = data;
len = HCI_SCO_HDR_SIZE + h->dlen;
} else
return -EILSEQ;
break;
#endif
}
BT_DBG("new packet len %d", len);
skb = bt_skb_alloc(len, GFP_ATOMIC);
if (!skb) {
BT_ERR("%s no memory for the packet", husb->hdev.name);
return -ENOMEM;
}
skb->dev = (void *) &husb->hdev;
skb->pkt_type = type;
__reassembly(husb, type) = skb;
scb = (void *) skb->cb;
scb->expect = len;
} else {
/* Continuation */
scb = (void *) skb->cb;
len = scb->expect;
}
if (!count) {
BT_DBG("%s intr status %d, count %d",
husb->hdev.name, urb->status, count);
goto exit;
}
len = min(len, count);
memcpy(skb_put(skb, len), data, len);
read_lock(&husb->completion_lock);
husb->hdev.stat.byte_rx += count;
scb->expect -= len;
if (!scb->expect) {
/* Complete frame */
__reassembly(husb, type) = NULL;
hci_recv_frame(skb);
}
count -= len; data += len;
}
return 0;
}
if (!(skb = husb->intr_skb)) {
/* Start of the frame */
if (count < HCI_EVENT_HDR_SIZE)
goto bad_len;
static void hci_usb_rx_complete(struct urb *urb, struct pt_regs *regs)
{
struct _urb *_urb = container_of(urb, struct _urb, urb);
struct hci_usb *husb = (void *) urb->context;
struct hci_dev *hdev = &husb->hdev;
int err, count = urb->actual_length;
eh = (struct hci_event_hdr *) data;
len = eh->plen + HCI_EVENT_HDR_SIZE;
BT_DBG("%s urb %p type %d status %d count %d flags %x", hdev->name, urb,
_urb->type, urb->status, count, urb->transfer_flags);
if (count > len)
goto bad_len;
if (!test_bit(HCI_RUNNING, &hdev->flags))
return;
skb = bt_skb_alloc(len, GFP_ATOMIC);
if (!skb) {
BT_ERR("%s no memory for event packet", husb->hdev.name);
goto done;
}
scb = (void *) skb->cb;
read_lock(&husb->completion_lock);
skb->dev = (void *) &husb->hdev;
skb->pkt_type = HCI_EVENT_PKT;
if (urb->status || !count)
goto resubmit;
husb->intr_skb = skb;
scb->intr_len = len;
if (_urb->type == HCI_SCODATA_PKT) {
#ifdef CONFIG_BT_USB_SCO
int i;
for (i=0; i < urb->number_of_packets; i++) {
BT_DBG("desc %d status %d offset %d len %d", i,
urb->iso_frame_desc[i].status,
urb->iso_frame_desc[i].offset,
urb->iso_frame_desc[i].actual_length);
if (!urb->iso_frame_desc[i].status)
__recv_frame(husb, _urb->type,
urb->transfer_buffer + urb->iso_frame_desc[i].offset,
urb->iso_frame_desc[i].actual_length);
}
#else
;
#endif
} else {
/* Continuation */
scb = (void *) skb->cb;
len = scb->intr_len;
if (count > len) {
husb->intr_skb = NULL;
kfree_skb(skb);
goto bad_len;
err = __recv_frame(husb, _urb->type, urb->transfer_buffer, count);
if (err < 0) {
BT_ERR("%s corrupted packet: type %d count %d",
husb->hdev.name, _urb->type, count);
hdev->stat.err_rx++;
}
}
memcpy(skb_put(skb, count), data, count);
scb->intr_len -= count;
if (!scb->intr_len) {
/* Complete frame */
husb->intr_skb = NULL;
hci_recv_frame(skb);
}
done:
read_unlock(&husb->completion_lock);
goto exit;
resubmit:
urb->dev = husb->udev;
err = usb_submit_urb(urb, GFP_ATOMIC);
BT_DBG("%s urb %p type %d resubmit status %d", hdev->name, urb,
_urb->type, err);
bad_len:
BT_ERR("%s bad frame len %d expected %d", husb->hdev.name, count, len);
husb->hdev.stat.err_rx++;
read_unlock(&husb->completion_lock);
exit:
status = usb_submit_urb (urb, GFP_ATOMIC);
if (status)
BT_ERR ("%s usb_submit_urb failed with result %d",
husb->hdev.name, status);
}
static void hci_usb_tx_complete(struct urb *urb, struct pt_regs *regs)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct hci_dev *hdev = (struct hci_dev *) skb->dev;
struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
struct _urb *_urb = container_of(urb, struct _urb, urb);
struct hci_usb *husb = (void *) urb->context;
struct hci_dev *hdev = &husb->hdev;
BT_DBG("%s urb %p status %d flags %x", husb->hdev.name, urb,
BT_DBG("%s urb %p status %d flags %x", hdev->name, urb,
urb->status, urb->transfer_flags);
if (urb->pipe == usb_sndctrlpipe(husb->udev, 0)) {
kfree(urb->setup_packet);
clear_bit(HCI_USB_CTRL_TX, &husb->state);
}
atomic_dec(__pending_tx(husb, _urb->type));
urb->transfer_buffer = NULL;
kfree_skb((struct sk_buff *) _urb->priv);
if (!test_bit(HCI_RUNNING, &hdev->flags))
return;
read_lock(&husb->completion_lock);
if (!urb->status)
husb->hdev.stat.byte_tx += skb->len;
hdev->stat.byte_tx += urb->transfer_buffer_length;
else
husb->hdev.stat.err_tx++;
skb_unlink(skb);
skb_queue_tail(&husb->completed_q, skb);
hci_usb_tx_wakeup(husb);
read_unlock(&husb->completion_lock);
return;
}
static void hci_usb_rx_complete(struct urb *urb, struct pt_regs *regs)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct hci_dev *hdev = (struct hci_dev *) skb->dev;
struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
int status, count = urb->actual_length;
struct hci_acl_hdr *ah;
int dlen, size;
BT_DBG("%s urb %p status %d count %d flags %x", husb->hdev.name, urb,
urb->status, count, urb->transfer_flags);
if (!test_bit(HCI_RUNNING, &hdev->flags))
return;
hdev->stat.err_tx++;
read_lock(&husb->completion_lock);
if (urb->status || !count)
goto resubmit;
husb->hdev.stat.byte_rx += count;
_urb_unlink(_urb);
_urb_queue_tail(__completed_q(husb, _urb->type), _urb);
ah = (struct hci_acl_hdr *) skb->data;
dlen = __le16_to_cpu(ah->dlen);
size = HCI_ACL_HDR_SIZE + dlen;
/* Verify frame len and completeness */
if (count != size) {
BT_ERR("%s corrupted ACL packet: count %d, dlen %d",
husb->hdev.name, count, dlen);
bt_dump("hci_usb", skb->data, count);
husb->hdev.stat.err_rx++;
goto resubmit;
}
skb_unlink(skb);
skb_put(skb, count);
hci_recv_frame(skb);
hci_usb_rx_submit(husb, urb);
read_unlock(&husb->completion_lock);
return;
resubmit:
urb->dev = husb->udev;
status = usb_submit_urb(urb, GFP_ATOMIC);
BT_DBG("%s URB resubmit status %d", husb->hdev.name, status);
hci_usb_tx_wakeup(husb);
read_unlock(&husb->completion_lock);
}
static void hci_usb_destruct(struct hci_dev *hdev)
{
struct hci_usb *husb;
if (!hdev) return;
struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
BT_DBG("%s", hdev->name);
husb = (struct hci_usb *) hdev->driver_data;
kfree(husb);
}
int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_host_endpoint *bulk_out_ep[HCI_MAX_IFACE_NUM];
struct usb_host_endpoint *isoc_out_ep[HCI_MAX_IFACE_NUM];
struct usb_host_endpoint *bulk_in_ep[HCI_MAX_IFACE_NUM];
struct usb_host_endpoint *isoc_in_ep[HCI_MAX_IFACE_NUM];
struct usb_host_endpoint *intr_in_ep[HCI_MAX_IFACE_NUM];
struct usb_host_endpoint *ep;
struct usb_host_interface *uif;
struct usb_host_endpoint *ep;
struct usb_interface *iface, *isoc_iface;
struct hci_usb *husb;
struct hci_dev *hdev;
int i, a, e, size, ifn, isoc_ifnum, isoc_alts;
BT_DBG("intf %p", intf);
BT_DBG("udev %p ifnum %d", udev, ifnum);
iface = &udev->actconfig->interface[0];
/* Check our black list */
if (usb_match_id(intf, ignore_ids))
......@@ -679,6 +825,7 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
bulk_out_ep[i] = ep;
break;
#ifdef CONFIG_BT_USB_SCO
case USB_ENDPOINT_XFER_ISOC:
if (ep->desc.wMaxPacketSize < size)
break;
......@@ -693,6 +840,7 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
else
isoc_out_ep[i] = ep;
break;
#endif
}
}
}
......@@ -703,10 +851,12 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
goto done;
}
#ifdef CONFIG_BT_USB_SCO
if (!isoc_in_ep[1] || !isoc_out_ep[1]) {
BT_DBG("Isoc endpoints not found");
isoc_iface = NULL;
}
#endif
if (!(husb = kmalloc(sizeof(struct hci_usb), GFP_KERNEL))) {
BT_ERR("Can't allocate: control structure");
......@@ -716,35 +866,36 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
memset(husb, 0, sizeof(struct hci_usb));
husb->udev = udev;
husb->bulk_out_ep = bulk_out_ep[0]->desc.bEndpointAddress;
husb->bulk_in_ep = bulk_in_ep[0]->desc.bEndpointAddress;
husb->intr_ep = intr_in_ep[0]->desc.bEndpointAddress;
husb->intr_interval = intr_in_ep[0]->desc.bInterval;
husb->bulk_out_ep = bulk_out_ep[0];
husb->bulk_in_ep = bulk_in_ep[0];
husb->intr_in_ep = intr_in_ep[0];
#ifdef CONFIG_BT_USB_SCO
if (isoc_iface) {
BT_DBG("isoc ifnum %d alts %d", isoc_ifnum, isoc_alts);
if (usb_set_interface(udev, isoc_ifnum, isoc_alts)) {
BT_ERR("Can't set isoc interface settings");
isoc_iface = NULL;
}
usb_driver_claim_interface(&hci_usb_driver, isoc_iface, husb);
husb->isoc_iface = isoc_iface;
husb->isoc_in_ep = isoc_in_ep[1]->desc.bEndpointAddress;
husb->isoc_out_ep = isoc_in_ep[1]->desc.bEndpointAddress;
husb->isoc_in_ep = isoc_in_ep[isoc_ifnum];
husb->isoc_out_ep = isoc_out_ep[isoc_ifnum];
}
husb->completion_lock = RW_LOCK_UNLOCKED;
#endif
skb_queue_head_init(&husb->acl_q);
skb_queue_head_init(&husb->cmd_q);
skb_queue_head_init(&husb->pending_q);
skb_queue_head_init(&husb->completed_q);
husb->completion_lock = RW_LOCK_UNLOCKED;
for (i = 0; i < 4; i++) {
skb_queue_head_init(&husb->transmit_q[i]);
_urb_queue_init(&husb->pending_q[i]);
_urb_queue_init(&husb->completed_q[i]);
}
/* Initialize and register HCI device */
hdev = &husb->hdev;
hdev->type = HCI_USB;
hdev->type = HCI_USB;
hdev->driver_data = husb;
hdev->open = hci_usb_open;
......@@ -753,8 +904,6 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
hdev->send = hci_usb_send_frame;
hdev->destruct = hci_usb_destruct;
hdev->owner = THIS_MODULE;
if (hci_register_dev(hdev) < 0) {
BT_ERR("Can't register HCI device");
goto probe_error;
......@@ -773,13 +922,12 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
static void hci_usb_disconnect(struct usb_interface *intf)
{
struct hci_usb *husb = usb_get_intfdata(intf);
struct hci_dev *hdev;
struct hci_dev *hdev = &husb->hdev;
if (!husb)
return;
usb_set_intfdata(intf, NULL);
hdev = &husb->hdev;
BT_DBG("%s", hdev->name);
hci_usb_close(hdev);
......@@ -792,17 +940,20 @@ static void hci_usb_disconnect(struct usb_interface *intf)
}
static struct usb_driver hci_usb_driver = {
.name = "hci_usb",
.probe = hci_usb_probe,
.disconnect = hci_usb_disconnect,
.id_table = bluetooth_ids
.owner = THIS_MODULE,
.name = "hci_usb",
.probe = hci_usb_probe,
.disconnect = hci_usb_disconnect,
.id_table = bluetooth_ids,
};
int hci_usb_init(void)
{
int err;
BT_INFO("HCI USB driver ver %s", VERSION);
BT_INFO("BlueZ HCI USB driver ver %s Copyright (C) 2000,2001 Qualcomm Inc",
VERSION);
BT_INFO("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
if ((err = usb_register(&hci_usb_driver)) < 0)
BT_ERR("Failed to register HCI USB driver");
......@@ -819,5 +970,5 @@ module_init(hci_usb_init);
module_exit(hci_usb_cleanup);
MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
MODULE_DESCRIPTION("Bluetooth HCI USB driver ver " VERSION);
MODULE_DESCRIPTION("BlueZ HCI USB driver ver " VERSION);
MODULE_LICENSE("GPL");
drivers/bluetooth/hci_usb.h
View file @ 2dbbab6f
/*
BlueZ - Bluetooth protocol stack for Linux
HCI USB driver for Linux Bluetooth protocol stack (BlueZ)
Copyright (C) 2000-2001 Qualcomm Incorporated
Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation;
......@@ -40,40 +41,96 @@
#define HCI_MAX_BULK_TX 4
#define HCI_MAX_BULK_RX 1
#define HCI_MAX_ISOC_FRAMES 10
struct _urb_queue {
struct list_head head;
spinlock_t lock;
};
struct _urb {
struct list_head list;
struct _urb_queue *queue;
int type;
void *priv;
struct urb urb;
};
struct _urb *_urb_alloc(int isoc, int gfp);
static inline void _urb_free(struct _urb *_urb)
{
kfree(_urb);
}
static inline void _urb_queue_init(struct _urb_queue *q)
{
INIT_LIST_HEAD(&q->head);
spin_lock_init(&q->lock);
}
static inline void _urb_queue_head(struct _urb_queue *q, struct _urb *_urb)
{
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
list_add(&_urb->list, &q->head); _urb->queue = q;
spin_unlock_irqrestore(&q->lock, flags);
}
static inline void _urb_queue_tail(struct _urb_queue *q, struct _urb *_urb)
{
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
list_add_tail(&_urb->list, &q->head); _urb->queue = q;
spin_unlock_irqrestore(&q->lock, flags);
}
static inline void _urb_unlink(struct _urb *_urb)
{
struct _urb_queue *q = _urb->queue;
unsigned long flags;
if (q) {
spin_lock_irqsave(&q->lock, flags);
list_del(&_urb->list); _urb->queue = NULL;
spin_unlock_irqrestore(&q->lock, flags);
}
}
struct _urb *_urb_dequeue(struct _urb_queue *q);
#ifndef container_of
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif
struct hci_usb {
struct hci_dev hdev;
unsigned long state;
struct usb_device *udev;
struct usb_interface *isoc_iface;
__u8 bulk_out_ep;
__u8 bulk_in_ep;
__u8 isoc_out_ep;
__u8 isoc_in_ep;
struct usb_host_endpoint *bulk_in_ep;
struct usb_host_endpoint *bulk_out_ep;
struct usb_host_endpoint *intr_in_ep;
struct usb_interface *isoc_iface;
struct usb_host_endpoint *isoc_out_ep;
struct usb_host_endpoint *isoc_in_ep;
__u8 intr_ep;
__u8 intr_interval;
struct urb *intr_urb;
struct sk_buff *intr_skb;
struct sk_buff_head transmit_q[4];
struct sk_buff *reassembly[4]; // Reassembly buffers
rwlock_t completion_lock;
struct sk_buff_head cmd_q; // TX Commands
struct sk_buff_head acl_q; // TX ACLs
struct sk_buff_head pending_q; // Pending requests
struct sk_buff_head completed_q; // Completed requests
};
struct hci_usb_scb {
struct urb *urb;
int intr_len;
atomic_t pending_tx[4]; // Number of pending requests
struct _urb_queue pending_q[4]; // Pending requests
struct _urb_queue completed_q[4]; // Completed requests
};
/* States */
#define HCI_USB_TX_PROCESS 1
#define HCI_USB_TX_WAKEUP 2
#define HCI_USB_CTRL_TX 3
#endif /* __KERNEL__ */
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