mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-11 04:36:40 +07:00
5e23b923da
This patch adds a new generic driver for Bluetooth USB devices. This driver is still experimental at this point, but it is cleaner and easier to maintain than the current Bluetooth USB driver. It is a much better starting point for power management improvements. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
565 lines
12 KiB
C
565 lines
12 KiB
C
/*
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*
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* Generic Bluetooth USB driver
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*
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* Copyright (C) 2005-2007 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/usb.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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//#define CONFIG_BT_HCIBTUSB_DEBUG
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#ifndef CONFIG_BT_HCIBTUSB_DEBUG
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#undef BT_DBG
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#define BT_DBG(D...)
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#endif
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#define VERSION "0.1"
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static struct usb_device_id btusb_table[] = {
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/* Generic Bluetooth USB device */
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{ USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, btusb_table);
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static struct usb_device_id blacklist_table[] = {
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{ } /* Terminating entry */
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};
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#define BTUSB_INTR_RUNNING 0
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#define BTUSB_BULK_RUNNING 1
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struct btusb_data {
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struct hci_dev *hdev;
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struct usb_device *udev;
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spinlock_t lock;
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unsigned long flags;
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struct work_struct work;
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struct usb_anchor tx_anchor;
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struct usb_anchor intr_anchor;
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struct usb_anchor bulk_anchor;
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struct usb_endpoint_descriptor *intr_ep;
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struct usb_endpoint_descriptor *bulk_tx_ep;
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struct usb_endpoint_descriptor *bulk_rx_ep;
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};
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static void btusb_intr_complete(struct urb *urb)
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{
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struct hci_dev *hdev = urb->context;
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struct btusb_data *data = hdev->driver_data;
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int err;
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BT_DBG("%s urb %p status %d count %d", hdev->name,
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urb, urb->status, urb->actual_length);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return;
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if (urb->status == 0) {
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if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
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urb->transfer_buffer,
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urb->actual_length) < 0) {
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BT_ERR("%s corrupted event packet", hdev->name);
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hdev->stat.err_rx++;
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}
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}
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if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
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return;
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usb_anchor_urb(urb, &data->intr_anchor);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s urb %p failed to resubmit (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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}
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}
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static inline int btusb_submit_intr_urb(struct hci_dev *hdev)
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{
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struct btusb_data *data = hdev->driver_data;
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struct urb *urb;
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unsigned char *buf;
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unsigned int pipe;
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int err, size;
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BT_DBG("%s", hdev->name);
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb)
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return -ENOMEM;
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size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
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buf = kmalloc(size, GFP_ATOMIC);
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if (!buf) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
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usb_fill_int_urb(urb, data->udev, pipe, buf, size,
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btusb_intr_complete, hdev,
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data->intr_ep->bInterval);
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urb->transfer_flags |= URB_FREE_BUFFER;
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usb_anchor_urb(urb, &data->intr_anchor);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s urb %p submission failed (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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kfree(buf);
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}
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usb_free_urb(urb);
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return err;
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}
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static void btusb_bulk_complete(struct urb *urb)
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{
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struct hci_dev *hdev = urb->context;
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struct btusb_data *data = hdev->driver_data;
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int err;
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BT_DBG("%s urb %p status %d count %d", hdev->name,
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urb, urb->status, urb->actual_length);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return;
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if (urb->status == 0) {
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if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
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urb->transfer_buffer,
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urb->actual_length) < 0) {
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BT_ERR("%s corrupted ACL packet", hdev->name);
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hdev->stat.err_rx++;
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}
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}
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if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
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return;
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usb_anchor_urb(urb, &data->bulk_anchor);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s urb %p failed to resubmit (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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}
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}
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static inline int btusb_submit_bulk_urb(struct hci_dev *hdev)
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{
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struct btusb_data *data = hdev->driver_data;
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struct urb *urb;
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unsigned char *buf;
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unsigned int pipe;
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int err, size;
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BT_DBG("%s", hdev->name);
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urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!urb)
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return -ENOMEM;
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size = le16_to_cpu(data->bulk_rx_ep->wMaxPacketSize);
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buf = kmalloc(size, GFP_KERNEL);
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if (!buf) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
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usb_fill_bulk_urb(urb, data->udev, pipe,
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buf, size, btusb_bulk_complete, hdev);
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urb->transfer_flags |= URB_FREE_BUFFER;
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usb_anchor_urb(urb, &data->bulk_anchor);
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err = usb_submit_urb(urb, GFP_KERNEL);
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if (err < 0) {
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BT_ERR("%s urb %p submission failed (%d)",
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hdev->name, urb, -err);
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usb_unanchor_urb(urb);
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kfree(buf);
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}
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usb_free_urb(urb);
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return err;
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}
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static void btusb_tx_complete(struct urb *urb)
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{
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struct sk_buff *skb = urb->context;
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struct hci_dev *hdev = (struct hci_dev *) skb->dev;
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BT_DBG("%s urb %p status %d count %d", hdev->name,
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urb, urb->status, urb->actual_length);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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goto done;
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if (!urb->status)
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hdev->stat.byte_tx += urb->transfer_buffer_length;
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else
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hdev->stat.err_tx++;
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done:
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kfree(urb->setup_packet);
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kfree_skb(skb);
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}
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static int btusb_open(struct hci_dev *hdev)
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{
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struct btusb_data *data = hdev->driver_data;
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int err;
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BT_DBG("%s", hdev->name);
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if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
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return 0;
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err = btusb_submit_intr_urb(hdev);
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if (err < 0) {
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clear_bit(BTUSB_INTR_RUNNING, &hdev->flags);
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clear_bit(HCI_RUNNING, &hdev->flags);
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}
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return err;
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}
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static int btusb_close(struct hci_dev *hdev)
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{
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struct btusb_data *data = hdev->driver_data;
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BT_DBG("%s", hdev->name);
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if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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clear_bit(BTUSB_BULK_RUNNING, &data->flags);
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usb_kill_anchored_urbs(&data->bulk_anchor);
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clear_bit(BTUSB_INTR_RUNNING, &data->flags);
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usb_kill_anchored_urbs(&data->intr_anchor);
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return 0;
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}
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static int btusb_flush(struct hci_dev *hdev)
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{
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struct btusb_data *data = hdev->driver_data;
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BT_DBG("%s", hdev->name);
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usb_kill_anchored_urbs(&data->tx_anchor);
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return 0;
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}
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static int btusb_send_frame(struct sk_buff *skb)
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{
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struct hci_dev *hdev = (struct hci_dev *) skb->dev;
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struct btusb_data *data = hdev->driver_data;
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struct usb_ctrlrequest *dr;
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struct urb *urb;
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unsigned int pipe;
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int err;
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BT_DBG("%s", hdev->name);
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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switch (bt_cb(skb)->pkt_type) {
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case HCI_COMMAND_PKT:
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb)
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return -ENOMEM;
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dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
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if (!dr) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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dr->bRequestType = USB_TYPE_CLASS;
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dr->bRequest = 0;
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dr->wIndex = 0;
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dr->wValue = 0;
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dr->wLength = __cpu_to_le16(skb->len);
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pipe = usb_sndctrlpipe(data->udev, 0x00);
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usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
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skb->data, skb->len, btusb_tx_complete, skb);
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hdev->stat.cmd_tx++;
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break;
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case HCI_ACLDATA_PKT:
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb)
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return -ENOMEM;
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pipe = usb_sndbulkpipe(data->udev,
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data->bulk_tx_ep->bEndpointAddress);
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usb_fill_bulk_urb(urb, data->udev, pipe,
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skb->data, skb->len, btusb_tx_complete, skb);
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hdev->stat.acl_tx++;
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break;
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case HCI_SCODATA_PKT:
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hdev->stat.sco_tx++;
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kfree_skb(skb);
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return 0;
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default:
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return -EILSEQ;
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}
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usb_anchor_urb(urb, &data->tx_anchor);
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0) {
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BT_ERR("%s urb %p submission failed", hdev->name, urb);
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kfree(urb->setup_packet);
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usb_unanchor_urb(urb);
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}
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usb_free_urb(urb);
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return err;
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}
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static void btusb_destruct(struct hci_dev *hdev)
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{
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struct btusb_data *data = hdev->driver_data;
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BT_DBG("%s", hdev->name);
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kfree(data);
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}
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static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
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{
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struct btusb_data *data = hdev->driver_data;
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BT_DBG("%s evt %d", hdev->name, evt);
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if (evt == HCI_NOTIFY_CONN_ADD || evt == HCI_NOTIFY_CONN_DEL)
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schedule_work(&data->work);
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}
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static void btusb_work(struct work_struct *work)
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{
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struct btusb_data *data = container_of(work, struct btusb_data, work);
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struct hci_dev *hdev = data->hdev;
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if (hdev->conn_hash.acl_num == 0) {
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clear_bit(BTUSB_BULK_RUNNING, &data->flags);
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usb_kill_anchored_urbs(&data->bulk_anchor);
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return;
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}
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if (!test_and_set_bit(BTUSB_BULK_RUNNING, &data->flags)) {
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if (btusb_submit_bulk_urb(hdev) < 0)
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clear_bit(BTUSB_BULK_RUNNING, &data->flags);
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else
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btusb_submit_bulk_urb(hdev);
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}
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}
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static int btusb_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct usb_endpoint_descriptor *ep_desc;
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struct btusb_data *data;
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struct hci_dev *hdev;
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int i, err;
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BT_DBG("intf %p id %p", intf, id);
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if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
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return -ENODEV;
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if (!id->driver_info) {
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const struct usb_device_id *match;
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match = usb_match_id(intf, blacklist_table);
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if (match)
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id = match;
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}
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
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ep_desc = &intf->cur_altsetting->endpoint[i].desc;
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if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
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data->intr_ep = ep_desc;
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continue;
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}
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if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
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data->bulk_tx_ep = ep_desc;
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continue;
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}
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if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
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data->bulk_rx_ep = ep_desc;
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continue;
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}
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}
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if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
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kfree(data);
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return -ENODEV;
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}
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data->udev = interface_to_usbdev(intf);
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spin_lock_init(&data->lock);
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INIT_WORK(&data->work, btusb_work);
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init_usb_anchor(&data->tx_anchor);
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init_usb_anchor(&data->intr_anchor);
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init_usb_anchor(&data->bulk_anchor);
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hdev = hci_alloc_dev();
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if (!hdev) {
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kfree(data);
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return -ENOMEM;
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}
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hdev->type = HCI_USB;
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hdev->driver_data = data;
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data->hdev = hdev;
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SET_HCIDEV_DEV(hdev, &intf->dev);
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hdev->open = btusb_open;
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hdev->close = btusb_close;
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hdev->flush = btusb_flush;
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hdev->send = btusb_send_frame;
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hdev->destruct = btusb_destruct;
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hdev->notify = btusb_notify;
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hdev->owner = THIS_MODULE;
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set_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks);
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err = hci_register_dev(hdev);
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if (err < 0) {
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hci_free_dev(hdev);
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kfree(data);
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return err;
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}
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usb_set_intfdata(intf, data);
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return 0;
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}
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static void btusb_disconnect(struct usb_interface *intf)
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{
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struct btusb_data *data = usb_get_intfdata(intf);
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struct hci_dev *hdev;
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BT_DBG("intf %p", intf);
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if (!data)
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return;
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hdev = data->hdev;
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usb_set_intfdata(intf, NULL);
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hci_unregister_dev(hdev);
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hci_free_dev(hdev);
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}
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static struct usb_driver btusb_driver = {
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.name = "btusb",
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.probe = btusb_probe,
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.disconnect = btusb_disconnect,
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.id_table = btusb_table,
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};
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static int __init btusb_init(void)
|
|
{
|
|
BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
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|
|
|
return usb_register(&btusb_driver);
|
|
}
|
|
|
|
static void __exit btusb_exit(void)
|
|
{
|
|
usb_deregister(&btusb_driver);
|
|
}
|
|
|
|
module_init(btusb_init);
|
|
module_exit(btusb_exit);
|
|
|
|
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
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|
MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
|
|
MODULE_VERSION(VERSION);
|
|
MODULE_LICENSE("GPL");
|