[linux-2.6-block.git] / drivers / bluetooth / bpa10x.c

/*
 *
 *  Digianswer Bluetooth USB driver
 *
 *  Copyright (C) 2004-2007  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/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>

#define VERSION "0.10"

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];
};

#define HCI_VENDOR_HDR_SIZE 5

struct hci_vendor_hdr {
	__u8    type;
	__le16  snum;
	__le16  dlen;
} __packed;

static int bpa10x_recv(struct hci_dev *hdev, int queue, void *buf, int count)
{
	struct bpa10x_data *data = hci_get_drvdata(hdev);

	BT_DBG("%s queue %d buffer %p count %d", hdev->name,
							queue, buf, count);

	if (queue < 0 || queue > 1)
		return -EILSEQ;

	hdev->stat.byte_rx += count;

	while (count) {
		struct sk_buff *skb = data->rx_skb[queue];
		struct { __u8 type; int expect; } *scb;
		int type, len = 0;

		if (!skb) {
			/* Start of the frame */

			type = *((__u8 *) buf);
			count--; buf++;

			switch (type) {
			case HCI_EVENT_PKT:
				if (count >= HCI_EVENT_HDR_SIZE) {
					struct hci_event_hdr *h = buf;
					len = HCI_EVENT_HDR_SIZE + h->plen;
				} else
					return -EILSEQ;
				break;

			case HCI_ACLDATA_PKT:
				if (count >= HCI_ACL_HDR_SIZE) {
					struct hci_acl_hdr *h = buf;
					len = HCI_ACL_HDR_SIZE +
							__le16_to_cpu(h->dlen);
				} else
					return -EILSEQ;
				break;

			case HCI_SCODATA_PKT:
				if (count >= HCI_SCO_HDR_SIZE) {
					struct hci_sco_hdr *h = buf;
					len = HCI_SCO_HDR_SIZE + h->dlen;
				} else
					return -EILSEQ;
				break;

			case HCI_VENDOR_PKT:
				if (count >= HCI_VENDOR_HDR_SIZE) {
					struct hci_vendor_hdr *h = buf;
					len = HCI_VENDOR_HDR_SIZE +
							__le16_to_cpu(h->dlen);
				} else
					return -EILSEQ;
				break;
			}

			skb = bt_skb_alloc(len, GFP_ATOMIC);
			if (!skb) {
				BT_ERR("%s no memory for packet", hdev->name);
				return -ENOMEM;
			}

			data->rx_skb[queue] = skb;

			scb = (void *) skb->cb;
			scb->type = type;
			scb->expect = len;
		} else {
			/* Continuation */

			scb = (void *) skb->cb;
			len = scb->expect;
		}

		len = min(len, count);

		memcpy(skb_put(skb, len), buf, len);

		scb->expect -= len;

		if (scb->expect == 0) {
			/* Complete frame */

			data->rx_skb[queue] = NULL;

			bt_cb(skb)->pkt_type = scb->type;
			hci_recv_frame(hdev, skb);
		}

		count -= len; buf += len;
	}

	return 0;
}

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);
}

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) {
		if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
						urb->transfer_buffer,
						urb->actual_length) < 0) {
			BT_ERR("%s corrupted event packet", hdev->name);
			hdev->stat.err_rx++;
		}
	}

	usb_anchor_urb(urb, &data->rx_anchor);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
		BT_ERR("%s urb %p failed to resubmit (%d)",
						hdev->name, 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_ERR("%s urb %p submission failed (%d)",
						hdev->name, 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_ERR("%s urb %p submission failed (%d)",
						hdev->name, 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);

	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	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);

	clear_bit(HCI_RUNNING, &hdev->flags);

	return err;
}

static int bpa10x_close(struct hci_dev *hdev)
{
	struct bpa10x_data *data = hci_get_drvdata(hdev);

	BT_DBG("%s", hdev->name);

	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	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_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);

	if (!test_bit(HCI_RUNNING, &hdev->flags))
		return -EBUSY;

	skb->dev = (void *) hdev;

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb)
		return -ENOMEM;

	/* Prepend skb with frame type */
	*skb_push(skb, 1) = bt_cb(skb)->pkt_type;

	switch (bt_cb(skb)->pkt_type) {
	case HCI_COMMAND_PKT:
		dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
		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_ATOMIC);
	if (err < 0) {
		BT_ERR("%s urb %p submission failed", hdev->name, urb);
		kfree(urb->setup_packet);
		usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	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->send     = bpa10x_send_frame;

	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,
	.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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* Digianswer Bluetooth USB driver
	4	*
e24b21ec	5	* Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
1da177e4 LT	6	*
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	*/
	23
1da177e4	24	#include <linux/kernel.h>
e24b21ec	25	#include <linux/module.h>
1da177e4 LT	26	#include <linux/init.h>
	27	#include <linux/slab.h>
	28	#include <linux/types.h>
e24b21ec	29	#include <linux/sched.h>
1da177e4	30	#include <linux/errno.h>
e24b21ec	31	#include <linux/skbuff.h>
1da177e4 LT	32
	33	#include <linux/usb.h>
	34
	35	#include <net/bluetooth/bluetooth.h>
	36	#include <net/bluetooth/hci_core.h>
	37
943d56b0	38	#define VERSION "0.10"
1da177e4	39
e8549384	40	static const struct usb_device_id bpa10x_table[] = {
1da177e4 LT	41	/* Tektronix BPA 100/105 (Digianswer) */
	42	{ USB_DEVICE(0x08fd, 0x0002) },
	43
	44	{ } /* Terminating entry */
	45	};
	46
	47	MODULE_DEVICE_TABLE(usb, bpa10x_table);
	48
1da177e4	49	struct bpa10x_data {
e24b21ec MH	50	struct hci_dev *hdev;
e24b21ec MH	51	struct usb_device *udev;
1da177e4	52
e24b21ec MH	53	struct usb_anchor tx_anchor;
e24b21ec MH	54	struct usb_anchor rx_anchor;
1da177e4	55
e24b21ec	56	struct sk_buff *rx_skb[2];
1da177e4 LT	57	};
1da177e4 LT	58
e24b21ec	59	#define HCI_VENDOR_HDR_SIZE 5
1da177e4 LT	60
1da177e4 LT	61	struct hci_vendor_hdr {
e24b21ec MH	62	__u8 type;
	63	__le16 snum;
	64	__le16 dlen;
81ca405a	65	} __packed;
1da177e4	66
e24b21ec	67	static int bpa10x_recv(struct hci_dev hdev, int queue, void buf, int count)
1da177e4	68	{
155961e8	69	struct bpa10x_data *data = hci_get_drvdata(hdev);
e24b21ec MH	70
	71	BT_DBG("%s queue %d buffer %p count %d", hdev->name,
	72	queue, buf, count);
	73
	74	if (queue < 0 \|\| queue > 1)
	75	return -EILSEQ;
	76
	77	hdev->stat.byte_rx += count;
1da177e4 LT	78
1da177e4 LT	79	while (count) {
e24b21ec MH	80	struct sk_buff *skb = data->rx_skb[queue];
	81	struct { __u8 type; int expect; } *scb;
	82	int type, len = 0;
1da177e4	83
e24b21ec MH	84	if (!skb) {
	85	/* Start of the frame */
	86
	87	type = ((__u8 ) buf);
	88	count--; buf++;
	89
	90	switch (type) {
	91	case HCI_EVENT_PKT:
	92	if (count >= HCI_EVENT_HDR_SIZE) {
	93	struct hci_event_hdr *h = buf;
	94	len = HCI_EVENT_HDR_SIZE + h->plen;
	95	} else
	96	return -EILSEQ;
	97	break;
	98
	99	case HCI_ACLDATA_PKT:
	100	if (count >= HCI_ACL_HDR_SIZE) {
	101	struct hci_acl_hdr *h = buf;
	102	len = HCI_ACL_HDR_SIZE +
	103	__le16_to_cpu(h->dlen);
	104	} else
	105	return -EILSEQ;
	106	break;
	107
	108	case HCI_SCODATA_PKT:
	109	if (count >= HCI_SCO_HDR_SIZE) {
	110	struct hci_sco_hdr *h = buf;
	111	len = HCI_SCO_HDR_SIZE + h->dlen;
	112	} else
	113	return -EILSEQ;
	114	break;
	115
	116	case HCI_VENDOR_PKT:
	117	if (count >= HCI_VENDOR_HDR_SIZE) {
	118	struct hci_vendor_hdr *h = buf;
	119	len = HCI_VENDOR_HDR_SIZE +
	120	__le16_to_cpu(h->dlen);
	121	} else
	122	return -EILSEQ;
	123	break;
1da177e4	124	}
1da177e4	125
1da177e4	126	skb = bt_skb_alloc(len, GFP_ATOMIC);
e24b21ec MH	127	if (!skb) {
	128	BT_ERR("%s no memory for packet", hdev->name);
	129	return -ENOMEM;
1da177e4	130	}
1da177e4	131
e24b21ec	132	data->rx_skb[queue] = skb;
1da177e4	133
e24b21ec MH	134	scb = (void *) skb->cb;
	135	scb->type = type;
	136	scb->expect = len;
	137	} else {
	138	/* Continuation */
1da177e4	139
e24b21ec MH	140	scb = (void *) skb->cb;
e24b21ec MH	141	len = scb->expect;
1da177e4 LT	142	}
1da177e4 LT	143
e24b21ec	144	len = min(len, count);
1da177e4	145
e24b21ec	146	memcpy(skb_put(skb, len), buf, len);
1da177e4	147
e24b21ec	148	scb->expect -= len;
1da177e4	149
e24b21ec MH	150	if (scb->expect == 0) {
e24b21ec MH	151	/* Complete frame */
1da177e4	152
e24b21ec	153	data->rx_skb[queue] = NULL;
1da177e4	154
e24b21ec	155	bt_cb(skb)->pkt_type = scb->type;
e1a26170	156	hci_recv_frame(hdev, skb);
1da177e4	157	}
e24b21ec MH	158
e24b21ec MH	159	count -= len; buf += len;
1da177e4 LT	160	}
	161
	162	return 0;
	163	}
	164
e24b21ec	165	static void bpa10x_tx_complete(struct urb *urb)
1da177e4	166	{
e24b21ec MH	167	struct sk_buff *skb = urb->context;
e24b21ec MH	168	struct hci_dev hdev = (struct hci_dev ) skb->dev;
1da177e4	169
e24b21ec MH	170	BT_DBG("%s urb %p status %d count %d", hdev->name,
e24b21ec MH	171	urb, urb->status, urb->actual_length);
1da177e4	172
e24b21ec MH	173	if (!test_bit(HCI_RUNNING, &hdev->flags))
	174	goto done;
	175
	176	if (!urb->status)
	177	hdev->stat.byte_tx += urb->transfer_buffer_length;
1da177e4	178	else
e24b21ec	179	hdev->stat.err_tx++;
1da177e4	180
e24b21ec MH	181	done:
e24b21ec MH	182	kfree(urb->setup_packet);
1da177e4	183
e24b21ec MH	184	kfree_skb(skb);
	185	}
	186
	187	static void bpa10x_rx_complete(struct urb *urb)
	188	{
	189	struct hci_dev *hdev = urb->context;
155961e8	190	struct bpa10x_data *data = hci_get_drvdata(hdev);
e24b21ec	191	int err;
1da177e4	192
e24b21ec MH	193	BT_DBG("%s urb %p status %d count %d", hdev->name,
e24b21ec MH	194	urb, urb->status, urb->actual_length);
1da177e4	195
e24b21ec MH	196	if (!test_bit(HCI_RUNNING, &hdev->flags))
e24b21ec MH	197	return;
1da177e4	198
e24b21ec MH	199	if (urb->status == 0) {
	200	if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
	201	urb->transfer_buffer,
	202	urb->actual_length) < 0) {
	203	BT_ERR("%s corrupted event packet", hdev->name);
	204	hdev->stat.err_rx++;
	205	}
1da177e4 LT	206	}
1da177e4 LT	207
e24b21ec MH	208	usb_anchor_urb(urb, &data->rx_anchor);
	209
	210	err = usb_submit_urb(urb, GFP_ATOMIC);
	211	if (err < 0) {
	212	BT_ERR("%s urb %p failed to resubmit (%d)",
	213	hdev->name, urb, -err);
	214	usb_unanchor_urb(urb);
1da177e4 LT	215	}
	216	}
	217
e24b21ec	218	static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
1da177e4	219	{
155961e8	220	struct bpa10x_data *data = hci_get_drvdata(hdev);
e24b21ec MH	221	struct urb *urb;
	222	unsigned char *buf;
	223	unsigned int pipe;
	224	int err, size = 16;
1da177e4	225
e24b21ec	226	BT_DBG("%s", hdev->name);
1da177e4	227
e24b21ec MH	228	urb = usb_alloc_urb(0, GFP_KERNEL);
	229	if (!urb)
	230	return -ENOMEM;
1da177e4	231
e24b21ec MH	232	buf = kmalloc(size, GFP_KERNEL);
	233	if (!buf) {
	234	usb_free_urb(urb);
	235	return -ENOMEM;
	236	}
1da177e4	237
e24b21ec	238	pipe = usb_rcvintpipe(data->udev, 0x81);
1da177e4	239
e24b21ec MH	240	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
e24b21ec MH	241	bpa10x_rx_complete, hdev, 1);
1da177e4	242
e24b21ec	243	urb->transfer_flags \|= URB_FREE_BUFFER;
1da177e4	244
e24b21ec	245	usb_anchor_urb(urb, &data->rx_anchor);
1da177e4	246
e24b21ec MH	247	err = usb_submit_urb(urb, GFP_KERNEL);
	248	if (err < 0) {
	249	BT_ERR("%s urb %p submission failed (%d)",
	250	hdev->name, urb, -err);
	251	usb_unanchor_urb(urb);
1da177e4 LT	252	}
1da177e4 LT	253
e24b21ec	254	usb_free_urb(urb);
1da177e4	255
e24b21ec	256	return err;
1da177e4 LT	257	}
1da177e4 LT	258
e24b21ec	259	static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
1da177e4	260	{
155961e8	261	struct bpa10x_data *data = hci_get_drvdata(hdev);
1da177e4	262	struct urb *urb;
1da177e4	263	unsigned char *buf;
e24b21ec MH	264	unsigned int pipe;
e24b21ec MH	265	int err, size = 64;
1da177e4	266
e24b21ec	267	BT_DBG("%s", hdev->name);
1da177e4	268
e24b21ec	269	urb = usb_alloc_urb(0, GFP_KERNEL);
1da177e4	270	if (!urb)
e24b21ec	271	return -ENOMEM;
1da177e4	272
e24b21ec	273	buf = kmalloc(size, GFP_KERNEL);
1da177e4 LT	274	if (!buf) {
1da177e4 LT	275	usb_free_urb(urb);
e24b21ec	276	return -ENOMEM;
1da177e4 LT	277	}
1da177e4 LT	278
e24b21ec	279	pipe = usb_rcvbulkpipe(data->udev, 0x82);
1da177e4	280
e24b21ec MH	281	usb_fill_bulk_urb(urb, data->udev, pipe,
e24b21ec MH	282	buf, size, bpa10x_rx_complete, hdev);
1da177e4	283
e24b21ec	284	urb->transfer_flags \|= URB_FREE_BUFFER;
1da177e4	285
e24b21ec	286	usb_anchor_urb(urb, &data->rx_anchor);
1da177e4	287
e24b21ec MH	288	err = usb_submit_urb(urb, GFP_KERNEL);
	289	if (err < 0) {
	290	BT_ERR("%s urb %p submission failed (%d)",
	291	hdev->name, urb, -err);
	292	usb_unanchor_urb(urb);
1da177e4 LT	293	}
1da177e4 LT	294
1da177e4	295	usb_free_urb(urb);
e24b21ec MH	296
e24b21ec MH	297	return err;
1da177e4 LT	298	}
	299
	300	static int bpa10x_open(struct hci_dev *hdev)
	301	{
155961e8	302	struct bpa10x_data *data = hci_get_drvdata(hdev);
1da177e4 LT	303	int err;
1da177e4 LT	304
e24b21ec	305	BT_DBG("%s", hdev->name);
1da177e4 LT	306
	307	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
	308	return 0;
	309
e24b21ec MH	310	err = bpa10x_submit_intr_urb(hdev);
	311	if (err < 0)
	312	goto error;
1da177e4	313
e24b21ec MH	314	err = bpa10x_submit_bulk_urb(hdev);
	315	if (err < 0)
	316	goto error;
1da177e4	317
e24b21ec	318	return 0;
1da177e4	319
e24b21ec MH	320	error:
e24b21ec MH	321	usb_kill_anchored_urbs(&data->rx_anchor);
1da177e4	322
e24b21ec	323	clear_bit(HCI_RUNNING, &hdev->flags);
1da177e4 LT	324
	325	return err;
	326	}
	327
	328	static int bpa10x_close(struct hci_dev *hdev)
	329	{
155961e8	330	struct bpa10x_data *data = hci_get_drvdata(hdev);
1da177e4	331
e24b21ec	332	BT_DBG("%s", hdev->name);
1da177e4 LT	333
	334	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
	335	return 0;
	336
e24b21ec	337	usb_kill_anchored_urbs(&data->rx_anchor);
1da177e4 LT	338
	339	return 0;
	340	}
	341
	342	static int bpa10x_flush(struct hci_dev *hdev)
	343	{
155961e8	344	struct bpa10x_data *data = hci_get_drvdata(hdev);
1da177e4	345
e24b21ec	346	BT_DBG("%s", hdev->name);
1da177e4	347
e24b21ec	348	usb_kill_anchored_urbs(&data->tx_anchor);
1da177e4 LT	349
	350	return 0;
	351	}
	352
7bd8f09f	353	static int bpa10x_send_frame(struct hci_dev hdev, struct sk_buff skb)
1da177e4	354	{
155961e8	355	struct bpa10x_data *data = hci_get_drvdata(hdev);
e24b21ec MH	356	struct usb_ctrlrequest *dr;
	357	struct urb *urb;
	358	unsigned int pipe;
	359	int err;
1da177e4	360
e24b21ec	361	BT_DBG("%s", hdev->name);
1da177e4 LT	362
	363	if (!test_bit(HCI_RUNNING, &hdev->flags))
	364	return -EBUSY;
	365
7bd8f09f MH	366	skb->dev = (void *) hdev;
7bd8f09f MH	367
e24b21ec MH	368	urb = usb_alloc_urb(0, GFP_ATOMIC);
	369	if (!urb)
	370	return -ENOMEM;
1da177e4 LT	371
1da177e4 LT	372	/* Prepend skb with frame type */
e24b21ec	373	*skb_push(skb, 1) = bt_cb(skb)->pkt_type;
1da177e4	374
0d48d939	375	switch (bt_cb(skb)->pkt_type) {
1da177e4	376	case HCI_COMMAND_PKT:
e24b21ec MH	377	dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
	378	if (!dr) {
	379	usb_free_urb(urb);
	380	return -ENOMEM;
	381	}
	382
	383	dr->bRequestType = USB_TYPE_VENDOR;
	384	dr->bRequest = 0;
	385	dr->wIndex = 0;
	386	dr->wValue = 0;
	387	dr->wLength = __cpu_to_le16(skb->len);
	388
	389	pipe = usb_sndctrlpipe(data->udev, 0x00);
	390
	391	usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
	392	skb->data, skb->len, bpa10x_tx_complete, skb);
	393
1da177e4	394	hdev->stat.cmd_tx++;
1da177e4 LT	395	break;
	396
	397	case HCI_ACLDATA_PKT:
e24b21ec MH	398	pipe = usb_sndbulkpipe(data->udev, 0x02);
	399
	400	usb_fill_bulk_urb(urb, data->udev, pipe,
	401	skb->data, skb->len, bpa10x_tx_complete, skb);
	402
1da177e4	403	hdev->stat.acl_tx++;
1da177e4 LT	404	break;
	405
	406	case HCI_SCODATA_PKT:
e24b21ec MH	407	pipe = usb_sndbulkpipe(data->udev, 0x02);
	408
	409	usb_fill_bulk_urb(urb, data->udev, pipe,
	410	skb->data, skb->len, bpa10x_tx_complete, skb);
	411
1da177e4	412	hdev->stat.sco_tx++;
1da177e4	413	break;
1da177e4	414
e24b21ec	415	default:
cb7cd429	416	usb_free_urb(urb);
e24b21ec MH	417	return -EILSEQ;
	418	}
	419
	420	usb_anchor_urb(urb, &data->tx_anchor);
1da177e4	421
e24b21ec MH	422	err = usb_submit_urb(urb, GFP_ATOMIC);
	423	if (err < 0) {
	424	BT_ERR("%s urb %p submission failed", hdev->name, urb);
	425	kfree(urb->setup_packet);
	426	usb_unanchor_urb(urb);
	427	}
1da177e4	428
e24b21ec	429	usb_free_urb(urb);
1da177e4 LT	430
	431	return 0;
	432	}
	433
1da177e4 LT	434	static int bpa10x_probe(struct usb_interface intf, const struct usb_device_id id)
1da177e4 LT	435	{
1da177e4	436	struct bpa10x_data *data;
e24b21ec	437	struct hci_dev *hdev;
1da177e4 LT	438	int err;
	439
	440	BT_DBG("intf %p id %p", intf, id);
	441
e24b21ec	442	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
1da177e4 LT	443	return -ENODEV;
1da177e4 LT	444
704687ce	445	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
e24b21ec	446	if (!data)
1da177e4	447	return -ENOMEM;
1da177e4	448
e24b21ec	449	data->udev = interface_to_usbdev(intf);
1da177e4	450
e24b21ec MH	451	init_usb_anchor(&data->tx_anchor);
e24b21ec MH	452	init_usb_anchor(&data->rx_anchor);
1da177e4 LT	453
1da177e4 LT	454	hdev = hci_alloc_dev();
704687ce	455	if (!hdev)
1da177e4	456	return -ENOMEM;
1da177e4	457
c13854ce	458	hdev->bus = HCI_USB;
155961e8	459	hci_set_drvdata(hdev, data);
e24b21ec MH	460
	461	data->hdev = hdev;
	462
1da177e4 LT	463	SET_HCIDEV_DEV(hdev, &intf->dev);
1da177e4 LT	464
e24b21ec MH	465	hdev->open = bpa10x_open;
	466	hdev->close = bpa10x_close;
	467	hdev->flush = bpa10x_flush;
	468	hdev->send = bpa10x_send_frame;
1da177e4	469
a6c511c6	470	set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
7a9d4020	471
1da177e4 LT	472	err = hci_register_dev(hdev);
1da177e4 LT	473	if (err < 0) {
1da177e4 LT	474	hci_free_dev(hdev);
	475	return err;
	476	}
	477
	478	usb_set_intfdata(intf, data);
	479
	480	return 0;
	481	}
	482
	483	static void bpa10x_disconnect(struct usb_interface *intf)
	484	{
	485	struct bpa10x_data *data = usb_get_intfdata(intf);
1da177e4 LT	486
	487	BT_DBG("intf %p", intf);
	488
e24b21ec	489	if (!data)
1da177e4 LT	490	return;
	491
	492	usb_set_intfdata(intf, NULL);
	493
e24b21ec	494	hci_unregister_dev(data->hdev);
1da177e4	495
e24b21ec	496	hci_free_dev(data->hdev);
d25442ba DH	497	kfree_skb(data->rx_skb[0]);
d25442ba DH	498	kfree_skb(data->rx_skb[1]);
1da177e4 LT	499	}
	500
	501	static struct usb_driver bpa10x_driver = {
1da177e4 LT	502	.name = "bpa10x",
	503	.probe = bpa10x_probe,
	504	.disconnect = bpa10x_disconnect,
	505	.id_table = bpa10x_table,
e1f12eb6	506	.disable_hub_initiated_lpm = 1,
1da177e4 LT	507	};
1da177e4 LT	508
93f1508c	509	module_usb_driver(bpa10x_driver);
1da177e4	510
1da177e4 LT	511	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	512	MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
	513	MODULE_VERSION(VERSION);
	514	MODULE_LICENSE("GPL");