linux-stable/drivers/bluetooth/bpa10x.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Digianswer Bluetooth USB driver
*
* Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/usb.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "h4_recv.h"
#define VERSION "0.11"
static const struct usb_device_id bpa10x_table[] = {
/* Tektronix BPA 100/105 (Digianswer) */
{ USB_DEVICE(0x08fd, 0x0002) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, bpa10x_table);
struct bpa10x_data {
struct hci_dev *hdev;
struct usb_device *udev;
struct usb_anchor tx_anchor;
struct usb_anchor rx_anchor;
struct sk_buff *rx_skb[2];
};
static void bpa10x_tx_complete(struct urb *urb)
{
struct sk_buff *skb = urb->context;
struct hci_dev *hdev = (struct hci_dev *) skb->dev;
BT_DBG("%s urb %p status %d count %d", hdev->name,
urb, urb->status, urb->actual_length);
if (!test_bit(HCI_RUNNING, &hdev->flags))
goto done;
if (!urb->status)
hdev->stat.byte_tx += urb->transfer_buffer_length;
else
hdev->stat.err_tx++;
done:
kfree(urb->setup_packet);
kfree_skb(skb);
}
#define HCI_VENDOR_HDR_SIZE 5
#define HCI_RECV_VENDOR \
.type = HCI_VENDOR_PKT, \
.hlen = HCI_VENDOR_HDR_SIZE, \
.loff = 3, \
.lsize = 2, \
.maxlen = HCI_MAX_FRAME_SIZE
static const struct h4_recv_pkt bpa10x_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = hci_recv_frame },
{ HCI_RECV_VENDOR, .recv = hci_recv_diag },
};
static void bpa10x_rx_complete(struct urb *urb)
{
struct hci_dev *hdev = urb->context;
struct bpa10x_data *data = hci_get_drvdata(hdev);
int err;
BT_DBG("%s urb %p status %d count %d", hdev->name,
urb, urb->status, urb->actual_length);
if (!test_bit(HCI_RUNNING, &hdev->flags))
return;
if (urb->status == 0) {
bool idx = usb_pipebulk(urb->pipe);
data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx],
urb->transfer_buffer,
urb->actual_length,
bpa10x_recv_pkts,
ARRAY_SIZE(bpa10x_recv_pkts));
if (IS_ERR(data->rx_skb[idx])) {
bt_dev_err(hdev, "corrupted event packet");
hdev->stat.err_rx++;
data->rx_skb[idx] = NULL;
}
}
usb_anchor_urb(urb, &data->rx_anchor);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err < 0) {
bt_dev_err(hdev, "urb %p failed to resubmit (%d)", urb, -err);
usb_unanchor_urb(urb);
}
}
static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
struct urb *urb;
unsigned char *buf;
unsigned int pipe;
int err, size = 16;
BT_DBG("%s", hdev->name);
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb)
return -ENOMEM;
buf = kmalloc(size, GFP_KERNEL);
if (!buf) {
usb_free_urb(urb);
return -ENOMEM;
}
pipe = usb_rcvintpipe(data->udev, 0x81);
usb_fill_int_urb(urb, data->udev, pipe, buf, size,
bpa10x_rx_complete, hdev, 1);
urb->transfer_flags |= URB_FREE_BUFFER;
usb_anchor_urb(urb, &data->rx_anchor);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err < 0) {
bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err);
usb_unanchor_urb(urb);
}
usb_free_urb(urb);
return err;
}
static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
struct urb *urb;
unsigned char *buf;
unsigned int pipe;
int err, size = 64;
BT_DBG("%s", hdev->name);
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb)
return -ENOMEM;
buf = kmalloc(size, GFP_KERNEL);
if (!buf) {
usb_free_urb(urb);
return -ENOMEM;
}
pipe = usb_rcvbulkpipe(data->udev, 0x82);
usb_fill_bulk_urb(urb, data->udev, pipe,
buf, size, bpa10x_rx_complete, hdev);
urb->transfer_flags |= URB_FREE_BUFFER;
usb_anchor_urb(urb, &data->rx_anchor);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err < 0) {
bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err);
usb_unanchor_urb(urb);
}
usb_free_urb(urb);
return err;
}
static int bpa10x_open(struct hci_dev *hdev)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
int err;
BT_DBG("%s", hdev->name);
err = bpa10x_submit_intr_urb(hdev);
if (err < 0)
goto error;
err = bpa10x_submit_bulk_urb(hdev);
if (err < 0)
goto error;
return 0;
error:
usb_kill_anchored_urbs(&data->rx_anchor);
return err;
}
static int bpa10x_close(struct hci_dev *hdev)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
BT_DBG("%s", hdev->name);
usb_kill_anchored_urbs(&data->rx_anchor);
return 0;
}
static int bpa10x_flush(struct hci_dev *hdev)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
BT_DBG("%s", hdev->name);
usb_kill_anchored_urbs(&data->tx_anchor);
return 0;
}
static int bpa10x_setup(struct hci_dev *hdev)
{
static const u8 req[] = { 0x07 };
struct sk_buff *skb;
BT_DBG("%s", hdev->name);
/* Read revision string */
skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
hci_set_fw_info(hdev, "%s", skb->data + 1);
kfree_skb(skb);
return 0;
}
static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
struct usb_ctrlrequest *dr;
struct urb *urb;
unsigned int pipe;
int err;
BT_DBG("%s", hdev->name);
skb->dev = (void *) hdev;
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb)
return -ENOMEM;
/* Prepend skb with frame type */
*(u8 *)skb_push(skb, 1) = hci_skb_pkt_type(skb);
switch (hci_skb_pkt_type(skb)) {
case HCI_COMMAND_PKT:
dr = kmalloc(sizeof(*dr), GFP_KERNEL);
if (!dr) {
usb_free_urb(urb);
return -ENOMEM;
}
dr->bRequestType = USB_TYPE_VENDOR;
dr->bRequest = 0;
dr->wIndex = 0;
dr->wValue = 0;
dr->wLength = __cpu_to_le16(skb->len);
pipe = usb_sndctrlpipe(data->udev, 0x00);
usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
skb->data, skb->len, bpa10x_tx_complete, skb);
hdev->stat.cmd_tx++;
break;
case HCI_ACLDATA_PKT:
pipe = usb_sndbulkpipe(data->udev, 0x02);
usb_fill_bulk_urb(urb, data->udev, pipe,
skb->data, skb->len, bpa10x_tx_complete, skb);
hdev->stat.acl_tx++;
break;
case HCI_SCODATA_PKT:
pipe = usb_sndbulkpipe(data->udev, 0x02);
usb_fill_bulk_urb(urb, data->udev, pipe,
skb->data, skb->len, bpa10x_tx_complete, skb);
hdev->stat.sco_tx++;
break;
default:
usb_free_urb(urb);
return -EILSEQ;
}
usb_anchor_urb(urb, &data->tx_anchor);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err < 0) {
bt_dev_err(hdev, "urb %p submission failed", urb);
kfree(urb->setup_packet);
usb_unanchor_urb(urb);
}
usb_free_urb(urb);
return err;
}
static int bpa10x_set_diag(struct hci_dev *hdev, bool enable)
{
const u8 req[] = { 0x00, enable };
struct sk_buff *skb;
BT_DBG("%s", hdev->name);
if (!test_bit(HCI_RUNNING, &hdev->flags))
return -ENETDOWN;
/* Enable sniffer operation */
skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
kfree_skb(skb);
return 0;
}
static int bpa10x_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct bpa10x_data *data;
struct hci_dev *hdev;
int err;
BT_DBG("intf %p id %p", intf, id);
if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
return -ENODEV;
data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->udev = interface_to_usbdev(intf);
init_usb_anchor(&data->tx_anchor);
init_usb_anchor(&data->rx_anchor);
hdev = hci_alloc_dev();
if (!hdev)
return -ENOMEM;
hdev->bus = HCI_USB;
hci_set_drvdata(hdev, data);
data->hdev = hdev;
SET_HCIDEV_DEV(hdev, &intf->dev);
hdev->open = bpa10x_open;
hdev->close = bpa10x_close;
hdev->flush = bpa10x_flush;
hdev->setup = bpa10x_setup;
hdev->send = bpa10x_send_frame;
hdev->set_diag = bpa10x_set_diag;
set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
err = hci_register_dev(hdev);
if (err < 0) {
hci_free_dev(hdev);
return err;
}
usb_set_intfdata(intf, data);
return 0;
}
static void bpa10x_disconnect(struct usb_interface *intf)
{
struct bpa10x_data *data = usb_get_intfdata(intf);
BT_DBG("intf %p", intf);
if (!data)
return;
usb_set_intfdata(intf, NULL);
hci_unregister_dev(data->hdev);
hci_free_dev(data->hdev);
kfree_skb(data->rx_skb[0]);
kfree_skb(data->rx_skb[1]);
}
static struct usb_driver bpa10x_driver = {
.name = "bpa10x",
.probe = bpa10x_probe,
.disconnect = bpa10x_disconnect,
.id_table = bpa10x_table,
USB: Disable hub-initiated LPM for comms devices. Hub-initiated LPM is not good for USB communications devices. Comms devices should be able to tell when their link can go into a lower power state, because they know when an incoming transmission is finished. Ideally, these devices would slam their links into a lower power state, using the device-initiated LPM, after finishing the last packet of their data transfer. If we enable the idle timeouts for the parent hubs to enable hub-initiated LPM, we will get a lot of useless LPM packets on the bus as the devices reject LPM transitions when they're in the middle of receiving data. Worse, some devices might blindly accept the hub-initiated LPM and power down their radios while they're in the middle of receiving a transmission. The Intel Windows folks are disabling hub-initiated LPM for all USB communications devices under a xHCI USB 3.0 host. In order to keep the Linux behavior as close as possible to Windows, we need to do the same in Linux. Set the disable_hub_initiated_lpm flag for for all USB communications drivers. I know there aren't currently any USB 3.0 devices that implement these class specifications, but we should be ready if they do. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: Hansjoerg Lipp <hjlipp@web.de> Cc: Tilman Schmidt <tilman@imap.cc> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: Peter Korsgaard <jacmet@sunsite.dk> Cc: Jan Dumon <j.dumon@option.com> Cc: Petko Manolov <petkan@users.sourceforge.net> Cc: Steve Glendinning <steve.glendinning@smsc.com> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Kalle Valo <kvalo@qca.qualcomm.com> Cc: "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com> Cc: Jouni Malinen <jouni@qca.qualcomm.com> Cc: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com> Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com> Cc: Christian Lamparter <chunkeey@googlemail.com> Cc: Brett Rudley <brudley@broadcom.com> Cc: Roland Vossen <rvossen@broadcom.com> Cc: Arend van Spriel <arend@broadcom.com> Cc: "Franky (Zhenhui) Lin" <frankyl@broadcom.com> Cc: Kan Yan <kanyan@broadcom.com> Cc: Dan Williams <dcbw@redhat.com> Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Cc: Ivo van Doorn <IvDoorn@gmail.com> Cc: Gertjan van Wingerde <gwingerde@gmail.com> Cc: Helmut Schaa <helmut.schaa@googlemail.com> Cc: Herton Ronaldo Krzesinski <herton@canonical.com> Cc: Hin-Tak Leung <htl10@users.sourceforge.net> Cc: Larry Finger <Larry.Finger@lwfinger.net> Cc: Chaoming Li <chaoming_li@realsil.com.cn> Cc: Daniel Drake <dsd@gentoo.org> Cc: Ulrich Kunitz <kune@deine-taler.de> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2012-04-23 17:08:51 +00:00
.disable_hub_initiated_lpm = 1,
};
module_usb_driver(bpa10x_driver);
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");