/* * * Digianswer Bluetooth USB driver * * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/usb.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> #ifndef CONFIG_BT_HCIBPA10X_DEBUG #undef BT_DBG #define BT_DBG(D...) #endif #define VERSION "0.8" static int ignore = 0; static struct usb_device_id bpa10x_table[] = { /* Tektronix BPA 100/105 (Digianswer) */ { USB_DEVICE(0x08fd, 0x0002) }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE(usb, bpa10x_table); #define BPA10X_CMD_EP 0x00 #define BPA10X_EVT_EP 0x81 #define BPA10X_TX_EP 0x02 #define BPA10X_RX_EP 0x82 #define BPA10X_CMD_BUF_SIZE 252 #define BPA10X_EVT_BUF_SIZE 16 #define BPA10X_TX_BUF_SIZE 384 #define BPA10X_RX_BUF_SIZE 384 struct bpa10x_data { struct hci_dev *hdev; struct usb_device *udev; rwlock_t lock; struct sk_buff_head cmd_queue; struct urb *cmd_urb; struct urb *evt_urb; struct sk_buff *evt_skb; unsigned int evt_len; struct sk_buff_head tx_queue; struct urb *tx_urb; struct urb *rx_urb; }; #define HCI_VENDOR_HDR_SIZE 5 struct hci_vendor_hdr { __u8 type; __le16 snum; __le16 dlen; } __attribute__ ((packed)); static void bpa10x_recv_bulk(struct bpa10x_data *data, unsigned char *buf, int count) { struct hci_acl_hdr *ah; struct hci_sco_hdr *sh; struct hci_vendor_hdr *vh; struct sk_buff *skb; int len; while (count) { switch (*buf++) { case HCI_ACLDATA_PKT: ah = (struct hci_acl_hdr *) buf; len = HCI_ACL_HDR_SIZE + __le16_to_cpu(ah->dlen); skb = bt_skb_alloc(len, GFP_ATOMIC); if (skb) { memcpy(skb_put(skb, len), buf, len); skb->dev = (void *) data->hdev; bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; hci_recv_frame(skb); } break; case HCI_SCODATA_PKT: sh = (struct hci_sco_hdr *) buf; len = HCI_SCO_HDR_SIZE + sh->dlen; skb = bt_skb_alloc(len, GFP_ATOMIC); if (skb) { memcpy(skb_put(skb, len), buf, len); skb->dev = (void *) data->hdev; bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; hci_recv_frame(skb); } break; case HCI_VENDOR_PKT: vh = (struct hci_vendor_hdr *) buf; len = HCI_VENDOR_HDR_SIZE + __le16_to_cpu(vh->dlen); skb = bt_skb_alloc(len, GFP_ATOMIC); if (skb) { memcpy(skb_put(skb, len), buf, len); skb->dev = (void *) data->hdev; bt_cb(skb)->pkt_type = HCI_VENDOR_PKT; hci_recv_frame(skb); } break; default: len = count - 1; break; } buf += len; count -= (len + 1); } } static int bpa10x_recv_event(struct bpa10x_data *data, unsigned char *buf, int size) { BT_DBG("data %p buf %p size %d", data, buf, size); if (data->evt_skb) { struct sk_buff *skb = data->evt_skb; memcpy(skb_put(skb, size), buf, size); if (skb->len == data->evt_len) { data->evt_skb = NULL; data->evt_len = 0; hci_recv_frame(skb); } } else { struct sk_buff *skb; struct hci_event_hdr *hdr; unsigned char pkt_type; int pkt_len = 0; if (size < HCI_EVENT_HDR_SIZE + 1) { BT_ERR("%s event packet block with size %d is too short", data->hdev->name, size); return -EILSEQ; } pkt_type = *buf++; size--; if (pkt_type != HCI_EVENT_PKT) { BT_ERR("%s unexpected event packet start byte 0x%02x", data->hdev->name, pkt_type); return -EPROTO; } hdr = (struct hci_event_hdr *) buf; pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen; skb = bt_skb_alloc(pkt_len, GFP_ATOMIC); if (!skb) { BT_ERR("%s no memory for new event packet", data->hdev->name); return -ENOMEM; } skb->dev = (void *) data->hdev; bt_cb(skb)->pkt_type = pkt_type; memcpy(skb_put(skb, size), buf, size); if (pkt_len == size) { hci_recv_frame(skb); } else { data->evt_skb = skb; data->evt_len = pkt_len; } } return 0; } static void bpa10x_wakeup(struct bpa10x_data *data) { struct urb *urb; struct sk_buff *skb; int err; BT_DBG("data %p", data); urb = data->cmd_urb; if (urb->status == -EINPROGRESS) skb = NULL; else skb = skb_dequeue(&data->cmd_queue); if (skb) { struct usb_ctrlrequest *cr; if (skb->len > BPA10X_CMD_BUF_SIZE) { BT_ERR("%s command packet with size %d is too big", data->hdev->name, skb->len); kfree_skb(skb); return; } cr = (struct usb_ctrlrequest *) urb->setup_packet; cr->wLength = __cpu_to_le16(skb->len); memcpy(urb->transfer_buffer, skb->data, skb->len); urb->transfer_buffer_length = skb->len; err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0 && err != -ENODEV) { BT_ERR("%s submit failed for command urb %p with error %d", data->hdev->name, urb, err); skb_queue_head(&data->cmd_queue, skb); } else kfree_skb(skb); } urb = data->tx_urb; if (urb->status == -EINPROGRESS) skb = NULL; else skb = skb_dequeue(&data->tx_queue); if (skb) { memcpy(urb->transfer_buffer, skb->data, skb->len); urb->transfer_buffer_length = skb->len; err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0 && err != -ENODEV) { BT_ERR("%s submit failed for command urb %p with error %d", data->hdev->name, urb, err); skb_queue_head(&data->tx_queue, skb); } else kfree_skb(skb); } } static void bpa10x_complete(struct urb *urb, struct pt_regs *regs) { struct bpa10x_data *data = urb->context; unsigned char *buf = urb->transfer_buffer; int err, count = urb->actual_length; BT_DBG("data %p urb %p buf %p count %d", data, urb, buf, count); read_lock(&data->lock); if (!test_bit(HCI_RUNNING, &data->hdev->flags)) goto unlock; if (urb->status < 0 || !count) goto resubmit; if (usb_pipein(urb->pipe)) { data->hdev->stat.byte_rx += count; if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) bpa10x_recv_event(data, buf, count); if (usb_pipetype(urb->pipe) == PIPE_BULK) bpa10x_recv_bulk(data, buf, count); } else { data->hdev->stat.byte_tx += count; bpa10x_wakeup(data); } resubmit: if (usb_pipein(urb->pipe)) { err = usb_submit_urb(urb, GFP_ATOMIC); if (err < 0 && err != -ENODEV) { BT_ERR("%s urb %p type %d resubmit status %d", data->hdev->name, urb, usb_pipetype(urb->pipe), err); } } unlock: read_unlock(&data->lock); } static inline struct urb *bpa10x_alloc_urb(struct usb_device *udev, unsigned int pipe, size_t size, gfp_t flags, void *data) { struct urb *urb; struct usb_ctrlrequest *cr; unsigned char *buf; BT_DBG("udev %p data %p", udev, data); urb = usb_alloc_urb(0, flags); if (!urb) return NULL; buf = kmalloc(size, flags); if (!buf) { usb_free_urb(urb); return NULL; } switch (usb_pipetype(pipe)) { case PIPE_CONTROL: cr = kmalloc(sizeof(*cr), flags); if (!cr) { kfree(buf); usb_free_urb(urb); return NULL; } cr->bRequestType = USB_TYPE_VENDOR; cr->bRequest = 0; cr->wIndex = 0; cr->wValue = 0; cr->wLength = __cpu_to_le16(0); usb_fill_control_urb(urb, udev, pipe, (void *) cr, buf, 0, bpa10x_complete, data); break; case PIPE_INTERRUPT: usb_fill_int_urb(urb, udev, pipe, buf, size, bpa10x_complete, data, 1); break; case PIPE_BULK: usb_fill_bulk_urb(urb, udev, pipe, buf, size, bpa10x_complete, data); break; default: kfree(buf); usb_free_urb(urb); return NULL; } return urb; } static inline void bpa10x_free_urb(struct urb *urb) { BT_DBG("urb %p", urb); if (!urb) return; kfree(urb->setup_packet); kfree(urb->transfer_buffer); usb_free_urb(urb); } static int bpa10x_open(struct hci_dev *hdev) { struct bpa10x_data *data = hdev->driver_data; struct usb_device *udev = data->udev; unsigned long flags; int err; BT_DBG("hdev %p data %p", hdev, data); if (test_and_set_bit(HCI_RUNNING, &hdev->flags)) return 0; data->cmd_urb = bpa10x_alloc_urb(udev, usb_sndctrlpipe(udev, BPA10X_CMD_EP), BPA10X_CMD_BUF_SIZE, GFP_KERNEL, data); if (!data->cmd_urb) { err = -ENOMEM; goto done; } data->evt_urb = bpa10x_alloc_urb(udev, usb_rcvintpipe(udev, BPA10X_EVT_EP), BPA10X_EVT_BUF_SIZE, GFP_KERNEL, data); if (!data->evt_urb) { bpa10x_free_urb(data->cmd_urb); err = -ENOMEM; goto done; } data->rx_urb = bpa10x_alloc_urb(udev, usb_rcvbulkpipe(udev, BPA10X_RX_EP), BPA10X_RX_BUF_SIZE, GFP_KERNEL, data); if (!data->rx_urb) { bpa10x_free_urb(data->evt_urb); bpa10x_free_urb(data->cmd_urb); err = -ENOMEM; goto done; } data->tx_urb = bpa10x_alloc_urb(udev, usb_sndbulkpipe(udev, BPA10X_TX_EP), BPA10X_TX_BUF_SIZE, GFP_KERNEL, data); if (!data->rx_urb) { bpa10x_free_urb(data->rx_urb); bpa10x_free_urb(data->evt_urb); bpa10x_free_urb(data->cmd_urb); err = -ENOMEM; goto done; } write_lock_irqsave(&data->lock, flags); err = usb_submit_urb(data->evt_urb, GFP_ATOMIC); if (err < 0) { BT_ERR("%s submit failed for event urb %p with error %d", data->hdev->name, data->evt_urb, err); } else { err = usb_submit_urb(data->rx_urb, GFP_ATOMIC); if (err < 0) { BT_ERR("%s submit failed for rx urb %p with error %d", data->hdev->name, data->evt_urb, err); usb_kill_urb(data->evt_urb); } } write_unlock_irqrestore(&data->lock, flags); done: if (err < 0) clear_bit(HCI_RUNNING, &hdev->flags); return err; } static int bpa10x_close(struct hci_dev *hdev) { struct bpa10x_data *data = hdev->driver_data; unsigned long flags; BT_DBG("hdev %p data %p", hdev, data); if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) return 0; write_lock_irqsave(&data->lock, flags); skb_queue_purge(&data->cmd_queue); usb_kill_urb(data->cmd_urb); usb_kill_urb(data->evt_urb); usb_kill_urb(data->rx_urb); usb_kill_urb(data->tx_urb); write_unlock_irqrestore(&data->lock, flags); bpa10x_free_urb(data->cmd_urb); bpa10x_free_urb(data->evt_urb); bpa10x_free_urb(data->rx_urb); bpa10x_free_urb(data->tx_urb); return 0; } static int bpa10x_flush(struct hci_dev *hdev) { struct bpa10x_data *data = hdev->driver_data; BT_DBG("hdev %p data %p", hdev, data); skb_queue_purge(&data->cmd_queue); return 0; } static int bpa10x_send_frame(struct sk_buff *skb) { struct hci_dev *hdev = (struct hci_dev *) skb->dev; struct bpa10x_data *data; BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len); if (!hdev) { BT_ERR("Frame for unknown HCI device"); return -ENODEV; } if (!test_bit(HCI_RUNNING, &hdev->flags)) return -EBUSY; data = hdev->driver_data; /* Prepend skb with frame type */ memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); switch (bt_cb(skb)->pkt_type) { case HCI_COMMAND_PKT: hdev->stat.cmd_tx++; skb_queue_tail(&data->cmd_queue, skb); break; case HCI_ACLDATA_PKT: hdev->stat.acl_tx++; skb_queue_tail(&data->tx_queue, skb); break; case HCI_SCODATA_PKT: hdev->stat.sco_tx++; skb_queue_tail(&data->tx_queue, skb); break; }; read_lock(&data->lock); bpa10x_wakeup(data); read_unlock(&data->lock); return 0; } static void bpa10x_destruct(struct hci_dev *hdev) { struct bpa10x_data *data = hdev->driver_data; BT_DBG("hdev %p data %p", hdev, data); kfree(data); } static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(intf); struct hci_dev *hdev; struct bpa10x_data *data; int err; BT_DBG("intf %p id %p", intf, id); if (ignore) return -ENODEV; if (intf->cur_altsetting->desc.bInterfaceNumber > 0) return -ENODEV; data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) { BT_ERR("Can't allocate data structure"); return -ENOMEM; } data->udev = udev; rwlock_init(&data->lock); skb_queue_head_init(&data->cmd_queue); skb_queue_head_init(&data->tx_queue); hdev = hci_alloc_dev(); if (!hdev) { BT_ERR("Can't allocate HCI device"); kfree(data); return -ENOMEM; } data->hdev = hdev; hdev->type = HCI_USB; hdev->driver_data = data; SET_HCIDEV_DEV(hdev, &intf->dev); hdev->open = bpa10x_open; hdev->close = bpa10x_close; hdev->flush = bpa10x_flush; hdev->send = bpa10x_send_frame; hdev->destruct = bpa10x_destruct; hdev->owner = THIS_MODULE; err = hci_register_dev(hdev); if (err < 0) { BT_ERR("Can't register HCI device"); kfree(data); 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); struct hci_dev *hdev = data->hdev; BT_DBG("intf %p", intf); if (!hdev) return; usb_set_intfdata(intf, NULL); if (hci_unregister_dev(hdev) < 0) BT_ERR("Can't unregister HCI device %s", hdev->name); hci_free_dev(hdev); } static struct usb_driver bpa10x_driver = { .name = "bpa10x", .probe = bpa10x_probe, .disconnect = bpa10x_disconnect, .id_table = bpa10x_table, }; static int __init bpa10x_init(void) { int err; BT_INFO("Digianswer Bluetooth USB driver ver %s", VERSION); err = usb_register(&bpa10x_driver); if (err < 0) BT_ERR("Failed to register USB driver"); return err; } static void __exit bpa10x_exit(void) { usb_deregister(&bpa10x_driver); } module_init(bpa10x_init); module_exit(bpa10x_exit); module_param(ignore, bool, 0644); MODULE_PARM_DESC(ignore, "Ignore devices from the matching table"); MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL");