/* * * Realtek Bluetooth USB driver * * Copyright (C) 2012-2015 Edward Bian * * * 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 #include #include #include #include #include #include #include #include #include #include #define VERSION "0.1" static struct usb_driver btusb_driver; /*******************************/ #include #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 33) #define HDEV_BUS hdev->bus #define BTUSB_RPM #else #define HDEV_BUS hdev->type #endif static int patch_add(struct usb_interface* intf); static void patch_remove(struct usb_interface* intf); static struct usb_device_id btusb_table[] = { { USB_DEVICE_AND_INTERFACE_INFO(0x0bda, 0x1724, 0xe0, 0x01, 0x01) }, { USB_DEVICE_AND_INTERFACE_INFO(0x0bda, 0x8723, 0xe0, 0x01, 0x01) }, { } }; /*******************************/ MODULE_DEVICE_TABLE(usb, btusb_table); #define BTUSB_MAX_ISOC_FRAMES 10 #define BTUSB_INTR_RUNNING 0 #define BTUSB_BULK_RUNNING 1 #define BTUSB_ISOC_RUNNING 2 #define BTUSB_SUSPENDING 3 #define BTUSB_DID_ISO_RESUME 4 struct btusb_data { struct hci_dev *hdev; struct usb_device *udev; struct usb_interface *intf; struct usb_interface *isoc; spinlock_t lock; unsigned long flags; struct work_struct work; struct work_struct waker; struct usb_anchor tx_anchor; struct usb_anchor intr_anchor; struct usb_anchor bulk_anchor; struct usb_anchor isoc_anchor; struct usb_anchor deferred; int tx_in_flight; spinlock_t txlock; struct usb_endpoint_descriptor *intr_ep; struct usb_endpoint_descriptor *bulk_tx_ep; struct usb_endpoint_descriptor *bulk_rx_ep; struct usb_endpoint_descriptor *isoc_tx_ep; struct usb_endpoint_descriptor *isoc_rx_ep; __u8 cmdreq_type; unsigned int sco_num; int isoc_altsetting; int suspend_count; }; static int inc_tx(struct btusb_data *data) { unsigned long flags; int rv; spin_lock_irqsave(&data->txlock, flags); rv = test_bit(BTUSB_SUSPENDING, &data->flags); if (!rv) data->tx_in_flight++; spin_unlock_irqrestore(&data->txlock, flags); return rv; } static void btusb_intr_complete(struct urb *urb) { struct hci_dev *hdev = urb->context; struct btusb_data *data = hdev->driver_data; 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) { hdev->stat.byte_rx += urb->actual_length; if (hci_recv_fragment(hdev, HCI_EVENT_PKT, urb->transfer_buffer, urb->actual_length) < 0) { BT_ERR("%s corrupted event packet", hdev->name); hdev->stat.err_rx++; } } if (!test_bit(BTUSB_INTR_RUNNING, &data->flags)) return; usb_mark_last_busy(data->udev); usb_anchor_urb(urb, &data->intr_anchor); err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) { /* -EPERM: urb is being killed; * -ENODEV: device got disconnected */ if (err != -EPERM && err != -ENODEV) BT_ERR("%s urb %p failed to resubmit (%d)", hdev->name, urb, -err); usb_unanchor_urb(urb); } } static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags) { struct btusb_data *data = hdev->driver_data; struct urb *urb; unsigned char *buf; unsigned int pipe; int err, size; BT_DBG("%s", hdev->name); if (!data->intr_ep) return -ENODEV; urb = usb_alloc_urb(0, mem_flags); if (!urb) return -ENOMEM; size = le16_to_cpu(data->intr_ep->wMaxPacketSize); buf = kmalloc(size, mem_flags); if (!buf) { usb_free_urb(urb); return -ENOMEM; } pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress); usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_intr_complete, hdev, data->intr_ep->bInterval); urb->transfer_flags |= URB_FREE_BUFFER; usb_anchor_urb(urb, &data->intr_anchor); err = usb_submit_urb(urb, mem_flags); if (err < 0) { BT_ERR("%s urb %p submission failed (%d)", hdev->name, urb, -err); usb_unanchor_urb(urb); } usb_free_urb(urb); return err; } static void btusb_bulk_complete(struct urb *urb) { struct hci_dev *hdev = urb->context; struct btusb_data *data = hdev->driver_data; 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) { hdev->stat.byte_rx += urb->actual_length; if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT, urb->transfer_buffer, urb->actual_length) < 0) { BT_ERR("%s corrupted ACL packet", hdev->name); hdev->stat.err_rx++; } } if (!test_bit(BTUSB_BULK_RUNNING, &data->flags)) return; usb_anchor_urb(urb, &data->bulk_anchor); usb_mark_last_busy(data->udev); err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) { /* -EPERM: urb is being killed; * -ENODEV: device got disconnected */ if (err != -EPERM && err != -ENODEV) BT_ERR("%s urb %p failed to resubmit (%d)", hdev->name, urb, -err); usb_unanchor_urb(urb); } } static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags) { struct btusb_data *data = hdev->driver_data; struct urb *urb; unsigned char *buf; unsigned int pipe; int err, size = HCI_MAX_FRAME_SIZE; BT_DBG("%s", hdev->name); if (!data->bulk_rx_ep) return -ENODEV; urb = usb_alloc_urb(0, mem_flags); if (!urb) return -ENOMEM; buf = kmalloc(size, mem_flags); if (!buf) { usb_free_urb(urb); return -ENOMEM; } pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress); usb_fill_bulk_urb(urb, data->udev, pipe, buf, size, btusb_bulk_complete, hdev); urb->transfer_flags |= URB_FREE_BUFFER; usb_mark_last_busy(data->udev); usb_anchor_urb(urb, &data->bulk_anchor); err = usb_submit_urb(urb, mem_flags); if (err < 0) { BT_ERR("%s urb %p submission failed (%d)", hdev->name, urb, -err); usb_unanchor_urb(urb); } usb_free_urb(urb); return err; } static void btusb_isoc_complete(struct urb *urb) { struct hci_dev *hdev = urb->context; struct btusb_data *data = hdev->driver_data; int i, 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) { for (i = 0; i < urb->number_of_packets; i++) { unsigned int offset = urb->iso_frame_desc[i].offset; unsigned int length = urb->iso_frame_desc[i].actual_length; if (urb->iso_frame_desc[i].status) continue; hdev->stat.byte_rx += length; if (hci_recv_fragment(hdev, HCI_SCODATA_PKT, urb->transfer_buffer + offset, length) < 0) { BT_ERR("%s corrupted SCO packet", hdev->name); hdev->stat.err_rx++; } } } if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags)) return; usb_anchor_urb(urb, &data->isoc_anchor); err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) { /* -EPERM: urb is being killed; * -ENODEV: device got disconnected */ if (err != -EPERM && err != -ENODEV) BT_ERR("%s urb %p failed to resubmit (%d)", hdev->name, urb, -err); usb_unanchor_urb(urb); } } static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu) { int i, offset = 0; BT_DBG("len %d mtu %d", len, mtu); for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu; i++, offset += mtu, len -= mtu) { urb->iso_frame_desc[i].offset = offset; urb->iso_frame_desc[i].length = mtu; } if (len && i < BTUSB_MAX_ISOC_FRAMES) { urb->iso_frame_desc[i].offset = offset; urb->iso_frame_desc[i].length = len; i++; } urb->number_of_packets = i; } static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags) { struct btusb_data *data = hdev->driver_data; struct urb *urb; unsigned char *buf; unsigned int pipe; int err, size; BT_DBG("%s", hdev->name); if (!data->isoc_rx_ep) return -ENODEV; urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags); if (!urb) return -ENOMEM; size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) * BTUSB_MAX_ISOC_FRAMES; buf = kmalloc(size, mem_flags); if (!buf) { usb_free_urb(urb); return -ENOMEM; } pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress); urb->dev = data->udev; urb->pipe = pipe; urb->context = hdev; urb->complete = btusb_isoc_complete; urb->interval = data->isoc_rx_ep->bInterval; urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP; urb->transfer_buffer = buf; urb->transfer_buffer_length = size; __fill_isoc_descriptor(urb, size, le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize)); usb_anchor_urb(urb, &data->isoc_anchor); err = usb_submit_urb(urb, mem_flags); if (err < 0) { BT_ERR("%s urb %p submission failed (%d)", hdev->name, urb, -err); usb_unanchor_urb(urb); } usb_free_urb(urb); return err; } static void btusb_tx_complete(struct urb *urb) { struct sk_buff *skb = urb->context; struct hci_dev *hdev = (struct hci_dev *) skb->dev; struct btusb_data *data = hdev->driver_data; 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: spin_lock(&data->txlock); data->tx_in_flight--; spin_unlock(&data->txlock); kfree(urb->setup_packet); kfree_skb(skb); } static void btusb_isoc_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); } static int btusb_open(struct hci_dev *hdev) { struct btusb_data *data = hdev->driver_data; int err; err = usb_autopm_get_interface(data->intf); if (err < 0) return err; data->intf->needs_remote_wakeup = 1; /*******************************/ while(0 == atomic_read(&hdev->promisc)) { msleep(1); } /*******************************/ if (test_and_set_bit(HCI_RUNNING, &hdev->flags)) goto done; if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags)) goto done; err = btusb_submit_intr_urb(hdev, GFP_KERNEL); if (err < 0) goto failed; err = btusb_submit_bulk_urb(hdev, GFP_KERNEL); if (err < 0) { usb_kill_anchored_urbs(&data->intr_anchor); goto failed; } set_bit(BTUSB_BULK_RUNNING, &data->flags); btusb_submit_bulk_urb(hdev, GFP_KERNEL); done: usb_autopm_put_interface(data->intf); return 0; failed: clear_bit(BTUSB_INTR_RUNNING, &data->flags); clear_bit(HCI_RUNNING, &hdev->flags); usb_autopm_put_interface(data->intf); return err; } static void btusb_stop_traffic(struct btusb_data *data) { usb_kill_anchored_urbs(&data->intr_anchor); usb_kill_anchored_urbs(&data->bulk_anchor); usb_kill_anchored_urbs(&data->isoc_anchor); } static int btusb_close(struct hci_dev *hdev) { struct btusb_data *data = hdev->driver_data; int err; if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) return 0; cancel_work_sync(&data->work); cancel_work_sync(&data->waker); clear_bit(BTUSB_ISOC_RUNNING, &data->flags); clear_bit(BTUSB_BULK_RUNNING, &data->flags); clear_bit(BTUSB_INTR_RUNNING, &data->flags); btusb_stop_traffic(data); err = usb_autopm_get_interface(data->intf); if (err < 0) goto failed; data->intf->needs_remote_wakeup = 0; usb_autopm_put_interface(data->intf); failed: usb_scuttle_anchored_urbs(&data->deferred); return 0; } static int btusb_flush(struct hci_dev *hdev) { struct btusb_data *data = hdev->driver_data; BT_DBG("%s", hdev->name); usb_kill_anchored_urbs(&data->tx_anchor); return 0; } static int btusb_send_frame(struct sk_buff *skb) { struct hci_dev *hdev = (struct hci_dev *) skb->dev; struct btusb_data *data = hdev->driver_data; struct usb_ctrlrequest *dr; struct urb *urb; unsigned int pipe; int err; BT_DBG("%s", hdev->name); if (!test_bit(HCI_RUNNING, &hdev->flags)) return -EBUSY; switch (bt_cb(skb)->pkt_type) { case HCI_COMMAND_PKT: urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) return -ENOMEM; dr = kmalloc(sizeof(*dr), GFP_ATOMIC); if (!dr) { usb_free_urb(urb); return -ENOMEM; } dr->bRequestType = data->cmdreq_type; 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, btusb_tx_complete, skb); hdev->stat.cmd_tx++; break; case HCI_ACLDATA_PKT: if (!data->bulk_tx_ep) return -ENODEV; urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) return -ENOMEM; pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress); usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len, btusb_tx_complete, skb); hdev->stat.acl_tx++; break; case HCI_SCODATA_PKT: if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1) return -ENODEV; urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC); if (!urb) return -ENOMEM; pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress); usb_fill_int_urb(urb, data->udev, pipe, skb->data, skb->len, btusb_isoc_tx_complete, skb, data->isoc_tx_ep->bInterval); urb->transfer_flags = URB_ISO_ASAP; __fill_isoc_descriptor(urb, skb->len, le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize)); hdev->stat.sco_tx++; goto skip_waking; default: return -EILSEQ; } err = inc_tx(data); if (err) { usb_anchor_urb(urb, &data->deferred); schedule_work(&data->waker); err = 0; goto done; } skip_waking: usb_anchor_urb(urb, &data->tx_anchor); err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) { BT_ERR("%s urb %p submission failed", hdev->name, urb); kfree(urb->setup_packet); usb_unanchor_urb(urb); } else { usb_mark_last_busy(data->udev); } usb_free_urb(urb); done: return err; } static void btusb_destruct(struct hci_dev *hdev) { BT_DBG("%s", hdev->name); hci_free_dev(hdev); } static void btusb_notify(struct hci_dev *hdev, unsigned int evt) { struct btusb_data *data = hdev->driver_data; BT_DBG("%s evt %d", hdev->name, evt); if (hdev->conn_hash.sco_num != data->sco_num) { data->sco_num = hdev->conn_hash.sco_num; schedule_work(&data->work); } } static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting) { struct btusb_data *data = hdev->driver_data; struct usb_interface *intf = data->isoc; struct usb_endpoint_descriptor *ep_desc; int i, err; if (!data->isoc) return -ENODEV; err = usb_set_interface(data->udev, 1, altsetting); if (err < 0) { BT_ERR("%s setting interface failed (%d)", hdev->name, -err); return err; } data->isoc_altsetting = altsetting; data->isoc_tx_ep = NULL; data->isoc_rx_ep = NULL; for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { ep_desc = &intf->cur_altsetting->endpoint[i].desc; if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) { data->isoc_tx_ep = ep_desc; continue; } if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) { data->isoc_rx_ep = ep_desc; continue; } } if (!data->isoc_tx_ep || !data->isoc_rx_ep) { BT_ERR("%s invalid SCO descriptors", hdev->name); return -ENODEV; } return 0; } static void btusb_work(struct work_struct *work) { struct btusb_data *data = container_of(work, struct btusb_data, work); struct hci_dev *hdev = data->hdev; int err; if (hdev->conn_hash.sco_num > 0) { if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) { err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf); if (err < 0) { clear_bit(BTUSB_ISOC_RUNNING, &data->flags); usb_kill_anchored_urbs(&data->isoc_anchor); return; } set_bit(BTUSB_DID_ISO_RESUME, &data->flags); } if (data->isoc_altsetting != 2) { clear_bit(BTUSB_ISOC_RUNNING, &data->flags); usb_kill_anchored_urbs(&data->isoc_anchor); if (__set_isoc_interface(hdev, 2) < 0) return; } if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) { if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0) clear_bit(BTUSB_ISOC_RUNNING, &data->flags); else btusb_submit_isoc_urb(hdev, GFP_KERNEL); } } else { clear_bit(BTUSB_ISOC_RUNNING, &data->flags); usb_kill_anchored_urbs(&data->isoc_anchor); __set_isoc_interface(hdev, 0); if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags)) usb_autopm_put_interface(data->isoc ? data->isoc : data->intf); } } static void btusb_waker(struct work_struct *work) { struct btusb_data *data = container_of(work, struct btusb_data, waker); int err; err = usb_autopm_get_interface(data->intf); if (err < 0) return; usb_autopm_put_interface(data->intf); } static int btusb_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_endpoint_descriptor *ep_desc; struct btusb_data *data; struct hci_dev *hdev; int i, err; /* interface numbers are hardcoded in the spec */ if (intf->cur_altsetting->desc.bInterfaceNumber != 0) return -ENODEV; /*******************************/ err = patch_add(intf); if (err < 0) { return -1; } /*******************************/ data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { ep_desc = &intf->cur_altsetting->endpoint[i].desc; if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) { data->intr_ep = ep_desc; continue; } if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) { data->bulk_tx_ep = ep_desc; continue; } if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) { data->bulk_rx_ep = ep_desc; continue; } } if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) { kfree(data); return -ENODEV; } data->cmdreq_type = USB_TYPE_CLASS; data->udev = interface_to_usbdev(intf); data->intf = intf; spin_lock_init(&data->lock); INIT_WORK(&data->work, btusb_work); INIT_WORK(&data->waker, btusb_waker); spin_lock_init(&data->txlock); init_usb_anchor(&data->tx_anchor); init_usb_anchor(&data->intr_anchor); init_usb_anchor(&data->bulk_anchor); init_usb_anchor(&data->isoc_anchor); init_usb_anchor(&data->deferred); hdev = hci_alloc_dev(); if (!hdev) { kfree(data); return -ENOMEM; } HDEV_BUS = HCI_USB; hdev->driver_data = data; data->hdev = hdev; SET_HCIDEV_DEV(hdev, &intf->dev); hdev->open = btusb_open; hdev->close = btusb_close; hdev->flush = btusb_flush; hdev->send = btusb_send_frame; hdev->destruct = btusb_destruct; hdev->notify = btusb_notify; hdev->owner = THIS_MODULE; /* Interface numbers are hardcoded in the specification */ data->isoc = usb_ifnum_to_if(data->udev, 1); if (data->isoc) { err = usb_driver_claim_interface(&btusb_driver, data->isoc, data); if (err < 0) { hci_free_dev(hdev); kfree(data); return err; } } err = hci_register_dev(hdev); if (err < 0) { hci_free_dev(hdev); kfree(data); return err; } usb_set_intfdata(intf, data); return 0; } static void btusb_disconnect(struct usb_interface *intf) { struct btusb_data *data = usb_get_intfdata(intf); struct hci_dev *hdev; if (!data) return; /*******************************/ patch_remove(intf); /*******************************/ hdev = data->hdev; __hci_dev_hold(hdev); usb_set_intfdata(data->intf, NULL); if (data->isoc) usb_set_intfdata(data->isoc, NULL); hci_unregister_dev(hdev); if (intf == data->isoc) usb_driver_release_interface(&btusb_driver, data->intf); else if (data->isoc) usb_driver_release_interface(&btusb_driver, data->isoc); __hci_dev_put(hdev); kfree(data); } #ifdef CONFIG_PM static int btusb_suspend(struct usb_interface *intf, pm_message_t message) { struct btusb_data *data = usb_get_intfdata(intf); if (data->suspend_count++) return 0; spin_lock_irq(&data->txlock); if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) { set_bit(BTUSB_SUSPENDING, &data->flags); spin_unlock_irq(&data->txlock); } else { spin_unlock_irq(&data->txlock); data->suspend_count--; return -EBUSY; } cancel_work_sync(&data->work); btusb_stop_traffic(data); usb_kill_anchored_urbs(&data->tx_anchor); return 0; } static void play_deferred(struct btusb_data *data) { struct urb *urb; int err; while ((urb = usb_get_from_anchor(&data->deferred))) { err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0) break; data->tx_in_flight++; } usb_scuttle_anchored_urbs(&data->deferred); } static int btusb_resume(struct usb_interface *intf) { struct btusb_data *data = usb_get_intfdata(intf); struct hci_dev *hdev = data->hdev; int err = 0; if (--data->suspend_count) return 0; if (!test_bit(HCI_RUNNING, &hdev->flags)) goto done; if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) { err = btusb_submit_intr_urb(hdev, GFP_NOIO); if (err < 0) { clear_bit(BTUSB_INTR_RUNNING, &data->flags); goto failed; } } if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) { err = btusb_submit_bulk_urb(hdev, GFP_NOIO); if (err < 0) { clear_bit(BTUSB_BULK_RUNNING, &data->flags); goto failed; } btusb_submit_bulk_urb(hdev, GFP_NOIO); } if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) { if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0) clear_bit(BTUSB_ISOC_RUNNING, &data->flags); else btusb_submit_isoc_urb(hdev, GFP_NOIO); } spin_lock_irq(&data->txlock); play_deferred(data); clear_bit(BTUSB_SUSPENDING, &data->flags); spin_unlock_irq(&data->txlock); schedule_work(&data->work); return 0; failed: usb_scuttle_anchored_urbs(&data->deferred); done: spin_lock_irq(&data->txlock); clear_bit(BTUSB_SUSPENDING, &data->flags); spin_unlock_irq(&data->txlock); return err; } #endif static struct usb_driver btusb_driver = { .name = "rtk_btusb", .probe = btusb_probe, .disconnect = btusb_disconnect, #ifdef CONFIG_PM .suspend = btusb_suspend, .resume = btusb_resume, #endif .id_table = btusb_table, .supports_autosuspend = 1, }; static int __init btusb_init(void) { BT_INFO("Realtek Bluetooth USB driver ver %s", VERSION); 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("Edward Bian "); MODULE_DESCRIPTION("Realtek Bluetooth USB driver ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL"); /******************************* ** Reasil patch code ********************************/ #include #include #include #define CMD_CMP_EVT 0x0e #define PKT_LEN 300 #define MSG_TO 1000 #define PATCH_SEG_MAX 252 #define DATA_END 0x80 #define DOWNLOAD_OPCODE 0xfc20 #define TRUE 1 #define FALSE 0 #define CMD_HDR_LEN sizeof(struct hci_command_hdr) #define EVT_HDR_LEN sizeof(struct hci_event_hdr) #define CMD_CMP_LEN sizeof(struct hci_ev_cmd_complete) enum rtk_endpoit { CTRL_EP = 0, INTR_EP = 1, BULK_EP = 2, ISOC_EP = 3 }; typedef struct { uint16_t prod_id; uint16_t lmp_sub; char* patch_name; const struct firmware *fw_cache; } patch_info; typedef struct { struct list_head list_node; struct usb_interface *intf; struct usb_device *udev; struct notifier_block pm_notifier; patch_info *patch_entry; int is_reset; } dev_data; typedef struct { dev_data *dev_entry; int pipe_in, pipe_out; uint8_t send_pkt[PKT_LEN]; uint8_t rcv_pkt[PKT_LEN]; struct hci_command_hdr *cmd_hdr; struct hci_event_hdr *evt_hdr; struct hci_ev_cmd_complete *cmd_cmp; uint8_t *req_para, *rsp_para; uint8_t *fw_data; int pkt_len, fw_len; } xchange_data; typedef struct { uint8_t index; uint8_t data[PATCH_SEG_MAX]; } __attribute__((packed)) download_cp; typedef struct { uint8_t status; uint8_t index; } __attribute__((packed)) download_rp; static dev_data* dev_data_find(struct usb_interface* intf); static patch_info* get_patch_entry(struct usb_device* udev); static int rtkbt_pm_notify(struct notifier_block* notifier, ulong pm_event, void* unused); static int download_patch(dev_data* dev_entry); static void init_xdata(xchange_data* xdata, dev_data* dev_entry); static int check_fw_version(xchange_data* xdata); static int get_firmware(xchange_data* xdata); static int download_data(xchange_data* xdata); static int send_hci_cmd(xchange_data* xdata); static int rcv_hci_evt(xchange_data* xdata); static patch_info patch_table[] = { { 0x1724, 0x1200, "rtk8723a"}, { 0x8723, 0x1200, "rtk8723a"}, { } }; static LIST_HEAD(dev_data_list); int patch_add(struct usb_interface* intf) { dev_data *dev_entry; patch_info *patch_entry; struct usb_device *udev; int ret_val; dev_entry = dev_data_find(intf); if (NULL != dev_entry) { ret_val = -1; goto patched; } udev = interface_to_usbdev(intf); #ifdef BTUSB_RPM usb_enable_autosuspend(udev); #endif patch_entry = get_patch_entry(udev); if (NULL == patch_entry) { ret_val = 0; goto no_patch; } dev_entry = kzalloc(sizeof(dev_data), GFP_KERNEL); dev_entry->intf = intf; dev_entry->udev = udev; dev_entry->pm_notifier.notifier_call = rtkbt_pm_notify; dev_entry->patch_entry = patch_entry; list_add(&dev_entry->list_node, &dev_data_list); register_pm_notifier(&dev_entry->pm_notifier); ret_val = download_patch(dev_entry); if (ret_val < 0) { goto patch_fail; } return 0; patch_fail: patch_remove(dev_entry->intf); no_patch: patched: return ret_val; } void patch_remove(struct usb_interface* intf) { dev_data *dev_entry; struct usb_device *udev; udev = interface_to_usbdev(intf); #ifdef BTUSB_RPM usb_disable_autosuspend(udev); #endif dev_entry = dev_data_find(intf); if (NULL == dev_entry) { return; } list_del(&dev_entry->list_node); unregister_pm_notifier(&dev_entry->pm_notifier); kfree(dev_entry); } dev_data* dev_data_find(struct usb_interface* intf) { dev_data *dev_entry; list_for_each_entry(dev_entry, &dev_data_list, list_node) { if (dev_entry->intf == intf) { return dev_entry; } } return NULL; } patch_info* get_patch_entry(struct usb_device* udev) { patch_info *patch_entry; uint16_t pid; patch_entry = patch_table; pid = le16_to_cpu(udev->descriptor.idProduct); while (pid != patch_entry->prod_id) { if (0 == patch_entry->prod_id) { return NULL; } patch_entry++; } return patch_entry; } int rtkbt_pm_notify( struct notifier_block* notifier, ulong pm_event, void* unused) { dev_data *dev_entry; patch_info *patch_entry; int ret_val; dev_entry = container_of(notifier, dev_data, pm_notifier); patch_entry = dev_entry->patch_entry; switch (pm_event) { case PM_SUSPEND_PREPARE: case PM_HIBERNATION_PREPARE: ret_val = request_firmware( &patch_entry->fw_cache, patch_entry->patch_name, &dev_entry->udev->dev); if (ret_val < 0) { return NOTIFY_BAD; } break; case PM_POST_SUSPEND: case PM_POST_HIBERNATION: case PM_POST_RESTORE: if (NULL != patch_entry->fw_cache) { release_firmware(patch_entry->fw_cache); patch_entry->fw_cache = NULL; } break; default: break; } return NOTIFY_DONE; } int download_patch(dev_data *dev_entry) { xchange_data xdata; uint8_t *fw_buf; int ret_val; init_xdata(&xdata, dev_entry); ret_val = check_fw_version(&xdata); if (ret_val != 0) { goto patch_end; } ret_val = get_firmware(&xdata); if (ret_val < 0) { goto patch_end; } fw_buf = xdata.fw_data; ret_val = download_data(&xdata); if (ret_val < 0) { goto patch_fail; } ret_val = check_fw_version(&xdata); if (ret_val <= 0) { ret_val = -1; goto patch_fail; } ret_val = 0; patch_fail: kfree(fw_buf); patch_end: BT_INFO("Rtk patch %d", ret_val); return ret_val; } void init_xdata( xchange_data* xdata, dev_data* dev_entry) { memset(xdata, 0, sizeof(xchange_data)); xdata->dev_entry = dev_entry; xdata->pipe_in = usb_rcvintpipe(dev_entry->udev, INTR_EP); xdata->pipe_out = usb_sndctrlpipe(dev_entry->udev, CTRL_EP); xdata->cmd_hdr = (struct hci_command_hdr*)(xdata->send_pkt); xdata->evt_hdr = (struct hci_event_hdr*)(xdata->rcv_pkt); xdata->cmd_cmp = (struct hci_ev_cmd_complete*)(xdata->rcv_pkt + EVT_HDR_LEN); xdata->req_para = xdata->send_pkt + CMD_HDR_LEN; xdata->rsp_para = xdata->rcv_pkt + EVT_HDR_LEN + CMD_CMP_LEN; } int check_fw_version(xchange_data* xdata) { struct hci_rp_read_local_version *read_ver_rsp; patch_info *patch_entry; int ret_val; xdata->cmd_hdr->opcode = cpu_to_le16(HCI_OP_READ_LOCAL_VERSION); xdata->cmd_hdr->plen = 0; xdata->pkt_len = CMD_HDR_LEN; ret_val = send_hci_cmd(xdata); if (ret_val < 0) { goto version_end; } ret_val = rcv_hci_evt(xdata); if (ret_val < 0) { goto version_end; } patch_entry = xdata->dev_entry->patch_entry; read_ver_rsp = (struct hci_rp_read_local_version*)(xdata->rsp_para); if (patch_entry->lmp_sub != read_ver_rsp->lmp_subver) { return 1; } ret_val = 0; version_end: return ret_val; } int get_firmware(xchange_data* xdata) { const struct firmware *fw; struct usb_device *udev; patch_info *patch_entry; char *fw_name; int ret_val; udev = xdata->dev_entry->udev; patch_entry = xdata->dev_entry->patch_entry; if (NULL != patch_entry->fw_cache) { fw = patch_entry->fw_cache; } else { fw_name = patch_entry->patch_name; ret_val = request_firmware(&fw, fw_name, &udev->dev); if (ret_val < 0) { goto fw_fail; } } xdata->fw_data = kzalloc(fw->size, GFP_KERNEL); if (NULL == xdata->fw_data) { ret_val = -ENOMEM; goto alloc_fail; } memcpy(xdata->fw_data, fw->data, fw->size); xdata->fw_len = fw->size; ret_val = 0; alloc_fail: release_firmware(fw); patch_entry->fw_cache = NULL; fw_fail: return ret_val; } int download_data(xchange_data* xdata) { download_cp *cmd_para; download_rp *evt_para; uint8_t *pcur; int pkt_len, frag_num, frag_len; int i, ret_val; cmd_para = (download_cp*)xdata->req_para; evt_para = (download_rp*)xdata->rsp_para; pcur = xdata->fw_data; pkt_len = CMD_HDR_LEN + sizeof(download_cp); frag_num = xdata->fw_len / PATCH_SEG_MAX + 1; frag_len = PATCH_SEG_MAX; for (i = 0; i < frag_num; i++) { cmd_para->index = i; if (i == (frag_num - 1)) { cmd_para->index |= DATA_END; frag_len = xdata->fw_len % PATCH_SEG_MAX; pkt_len -= (PATCH_SEG_MAX - frag_len); } xdata->cmd_hdr->opcode = cpu_to_le16(DOWNLOAD_OPCODE); xdata->cmd_hdr->plen = sizeof(uint8_t) + frag_len; xdata->pkt_len = pkt_len; memcpy(cmd_para->data, pcur, frag_len); ret_val = send_hci_cmd(xdata); if (ret_val < 0) { return ret_val; } ret_val = rcv_hci_evt(xdata); if (ret_val < 0) { return ret_val; } if (0 != evt_para->status) { return -1; } pcur += PATCH_SEG_MAX; } return xdata->fw_len; } int send_hci_cmd(xchange_data* xdata) { int ret_val; ret_val = usb_control_msg( xdata->dev_entry->udev, xdata->pipe_out, 0, USB_TYPE_CLASS, 0, 0, (void*)(xdata->send_pkt), xdata->pkt_len, MSG_TO); return ret_val; } int rcv_hci_evt(xchange_data* xdata) { int ret_len, ret_val; while (1) { ret_val = usb_interrupt_msg( xdata->dev_entry->udev, xdata->pipe_in, (void*)(xdata->rcv_pkt), PKT_LEN, &ret_len, MSG_TO); if (ret_val < 0) { return ret_val; } if (CMD_CMP_EVT != xdata->evt_hdr->evt) { return -1; } if (xdata->cmd_hdr->opcode == xdata->cmd_cmp->opcode) { return ret_len; } } }