bpa10x.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *
  4 *  Digianswer Bluetooth USB driver
  5 *
  6 *  Copyright (C) 2004-2007  Marcel Holtmann <marcel@holtmann.org>
  7 */
  8
  9#include <linux/kernel.h>
 10#include <linux/module.h>
 11#include <linux/init.h>
 12#include <linux/slab.h>
 13#include <linux/types.h>
 14#include <linux/sched.h>
 15#include <linux/errno.h>
 16#include <linux/skbuff.h>
 17
 18#include <linux/usb.h>
 19
 20#include <net/bluetooth/bluetooth.h>
 21#include <net/bluetooth/hci_core.h>
 22
 23#include "hci_uart.h"
 24
 25#define VERSION "0.11"
 26
 27static const struct usb_device_id bpa10x_table[] = {
 28	/* Tektronix BPA 100/105 (Digianswer) */
 29	{ USB_DEVICE(0x08fd, 0x0002) },
 30
 31	{ }	/* Terminating entry */
 32};
 33
 34MODULE_DEVICE_TABLE(usb, bpa10x_table);
 35
 36struct bpa10x_data {
 37	struct hci_dev    *hdev;
 38	struct usb_device *udev;
 39
 40	struct usb_anchor tx_anchor;
 41	struct usb_anchor rx_anchor;
 42
 43	struct sk_buff *rx_skb[2];
 44	struct hci_uart hu;
 45};
 46
 47static void bpa10x_tx_complete(struct urb *urb)
 48{
 49	struct sk_buff *skb = urb->context;
 50	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 51
 52	BT_DBG("%s urb %p status %d count %d", hdev->name,
 53					urb, urb->status, urb->actual_length);
 54
 55	if (!test_bit(HCI_RUNNING, &hdev->flags))
 56		goto done;
 57
 58	if (!urb->status)
 59		hdev->stat.byte_tx += urb->transfer_buffer_length;
 60	else
 61		hdev->stat.err_tx++;
 62
 63done:
 64	kfree(urb->setup_packet);
 65
 66	kfree_skb(skb);
 67}
 68
 69#define HCI_VENDOR_HDR_SIZE 5
 70
 71#define HCI_RECV_VENDOR \
 72	.type = HCI_VENDOR_PKT, \
 73	.hlen = HCI_VENDOR_HDR_SIZE, \
 74	.loff = 3, \
 75	.lsize = 2, \
 76	.maxlen = HCI_MAX_FRAME_SIZE
 77
 78static const struct h4_recv_pkt bpa10x_recv_pkts[] = {
 79	{ H4_RECV_ACL,     .recv = hci_recv_frame },
 80	{ H4_RECV_SCO,     .recv = hci_recv_frame },
 81	{ H4_RECV_EVENT,   .recv = hci_recv_frame },
 82	{ HCI_RECV_VENDOR, .recv = hci_recv_diag  },
 83};
 84
 85static void bpa10x_rx_complete(struct urb *urb)
 86{
 87	struct hci_dev *hdev = urb->context;
 88	struct bpa10x_data *data = hci_get_drvdata(hdev);
 89	int err;
 90
 91	BT_DBG("%s urb %p status %d count %d", hdev->name,
 92					urb, urb->status, urb->actual_length);
 93
 94	if (!test_bit(HCI_RUNNING, &hdev->flags))
 95		return;
 96
 97	if (urb->status == 0) {
 98		bool idx = usb_pipebulk(urb->pipe);
 99
100		data->rx_skb[idx] = h4_recv_buf(&data->hu, data->rx_skb[idx],
101						urb->transfer_buffer,
102						urb->actual_length,
103						bpa10x_recv_pkts,
104						ARRAY_SIZE(bpa10x_recv_pkts));
105		if (IS_ERR(data->rx_skb[idx])) {
106			bt_dev_err(hdev, "corrupted event packet");
107			hdev->stat.err_rx++;
108			data->rx_skb[idx] = NULL;
109		}
110	}
111
112	usb_anchor_urb(urb, &data->rx_anchor);
113
114	err = usb_submit_urb(urb, GFP_ATOMIC);
115	if (err < 0) {
116		bt_dev_err(hdev, "urb %p failed to resubmit (%d)", urb, -err);
117		usb_unanchor_urb(urb);
118	}
119}
120
121static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
122{
123	struct bpa10x_data *data = hci_get_drvdata(hdev);
124	struct urb *urb;
125	unsigned char *buf;
126	unsigned int pipe;
127	int err, size = 16;
128
129	BT_DBG("%s", hdev->name);
130
131	urb = usb_alloc_urb(0, GFP_KERNEL);
132	if (!urb)
133		return -ENOMEM;
134
135	buf = kmalloc(size, GFP_KERNEL);
136	if (!buf) {
137		usb_free_urb(urb);
138		return -ENOMEM;
139	}
140
141	pipe = usb_rcvintpipe(data->udev, 0x81);
142
143	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
144						bpa10x_rx_complete, hdev, 1);
145
146	urb->transfer_flags |= URB_FREE_BUFFER;
147
148	usb_anchor_urb(urb, &data->rx_anchor);
149
150	err = usb_submit_urb(urb, GFP_KERNEL);
151	if (err < 0) {
152		bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err);
153		usb_unanchor_urb(urb);
154	}
155
156	usb_free_urb(urb);
157
158	return err;
159}
160
161static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
162{
163	struct bpa10x_data *data = hci_get_drvdata(hdev);
164	struct urb *urb;
165	unsigned char *buf;
166	unsigned int pipe;
167	int err, size = 64;
168
169	BT_DBG("%s", hdev->name);
170
171	urb = usb_alloc_urb(0, GFP_KERNEL);
172	if (!urb)
173		return -ENOMEM;
174
175	buf = kmalloc(size, GFP_KERNEL);
176	if (!buf) {
177		usb_free_urb(urb);
178		return -ENOMEM;
179	}
180
181	pipe = usb_rcvbulkpipe(data->udev, 0x82);
182
183	usb_fill_bulk_urb(urb, data->udev, pipe,
184					buf, size, bpa10x_rx_complete, hdev);
185
186	urb->transfer_flags |= URB_FREE_BUFFER;
187
188	usb_anchor_urb(urb, &data->rx_anchor);
189
190	err = usb_submit_urb(urb, GFP_KERNEL);
191	if (err < 0) {
192		bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err);
193		usb_unanchor_urb(urb);
194	}
195
196	usb_free_urb(urb);
197
198	return err;
199}
200
201static int bpa10x_open(struct hci_dev *hdev)
202{
203	struct bpa10x_data *data = hci_get_drvdata(hdev);
204	int err;
205
206	BT_DBG("%s", hdev->name);
207
208	err = bpa10x_submit_intr_urb(hdev);
209	if (err < 0)
210		goto error;
211
212	err = bpa10x_submit_bulk_urb(hdev);
213	if (err < 0)
214		goto error;
215
216	return 0;
217
218error:
219	usb_kill_anchored_urbs(&data->rx_anchor);
220
221	return err;
222}
223
224static int bpa10x_close(struct hci_dev *hdev)
225{
226	struct bpa10x_data *data = hci_get_drvdata(hdev);
227
228	BT_DBG("%s", hdev->name);
229
230	usb_kill_anchored_urbs(&data->rx_anchor);
231
232	return 0;
233}
234
235static int bpa10x_flush(struct hci_dev *hdev)
236{
237	struct bpa10x_data *data = hci_get_drvdata(hdev);
238
239	BT_DBG("%s", hdev->name);
240
241	usb_kill_anchored_urbs(&data->tx_anchor);
242
243	return 0;
244}
245
246static int bpa10x_setup(struct hci_dev *hdev)
247{
248	static const u8 req[] = { 0x07 };
249	struct sk_buff *skb;
250
251	BT_DBG("%s", hdev->name);
252
253	/* Read revision string */
254	skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
255	if (IS_ERR(skb))
256		return PTR_ERR(skb);
257
258	bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
259
260	hci_set_fw_info(hdev, "%s", skb->data + 1);
261
262	kfree_skb(skb);
263	return 0;
264}
265
266static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
267{
268	struct bpa10x_data *data = hci_get_drvdata(hdev);
269	struct usb_ctrlrequest *dr;
270	struct urb *urb;
271	unsigned int pipe;
272	int err;
273
274	BT_DBG("%s", hdev->name);
275
276	skb->dev = (void *) hdev;
277
278	urb = usb_alloc_urb(0, GFP_KERNEL);
279	if (!urb)
280		return -ENOMEM;
281
282	/* Prepend skb with frame type */
283	*(u8 *)skb_push(skb, 1) = hci_skb_pkt_type(skb);
284
285	switch (hci_skb_pkt_type(skb)) {
286	case HCI_COMMAND_PKT:
287		dr = kmalloc(sizeof(*dr), GFP_KERNEL);
288		if (!dr) {
289			usb_free_urb(urb);
290			return -ENOMEM;
291		}
292
293		dr->bRequestType = USB_TYPE_VENDOR;
294		dr->bRequest     = 0;
295		dr->wIndex       = 0;
296		dr->wValue       = 0;
297		dr->wLength      = __cpu_to_le16(skb->len);
298
299		pipe = usb_sndctrlpipe(data->udev, 0x00);
300
301		usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
302				skb->data, skb->len, bpa10x_tx_complete, skb);
303
304		hdev->stat.cmd_tx++;
305		break;
306
307	case HCI_ACLDATA_PKT:
308		pipe = usb_sndbulkpipe(data->udev, 0x02);
309
310		usb_fill_bulk_urb(urb, data->udev, pipe,
311				skb->data, skb->len, bpa10x_tx_complete, skb);
312
313		hdev->stat.acl_tx++;
314		break;
315
316	case HCI_SCODATA_PKT:
317		pipe = usb_sndbulkpipe(data->udev, 0x02);
318
319		usb_fill_bulk_urb(urb, data->udev, pipe,
320				skb->data, skb->len, bpa10x_tx_complete, skb);
321
322		hdev->stat.sco_tx++;
323		break;
324
325	default:
326		usb_free_urb(urb);
327		return -EILSEQ;
328	}
329
330	usb_anchor_urb(urb, &data->tx_anchor);
331
332	err = usb_submit_urb(urb, GFP_KERNEL);
333	if (err < 0) {
334		bt_dev_err(hdev, "urb %p submission failed", urb);
335		kfree(urb->setup_packet);
336		usb_unanchor_urb(urb);
337	}
338
339	usb_free_urb(urb);
340
341	return err;
342}
343
344static int bpa10x_set_diag(struct hci_dev *hdev, bool enable)
345{
346	const u8 req[] = { 0x00, enable };
347	struct sk_buff *skb;
348
349	BT_DBG("%s", hdev->name);
350
351	if (!test_bit(HCI_RUNNING, &hdev->flags))
352		return -ENETDOWN;
353
354	/* Enable sniffer operation */
355	skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
356	if (IS_ERR(skb))
357		return PTR_ERR(skb);
358
359	kfree_skb(skb);
360	return 0;
361}
362
363static int bpa10x_probe(struct usb_interface *intf,
364			const struct usb_device_id *id)
365{
366	struct bpa10x_data *data;
367	struct hci_dev *hdev;
368	int err;
369
370	BT_DBG("intf %p id %p", intf, id);
371
372	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
373		return -ENODEV;
374
375	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
376	if (!data)
377		return -ENOMEM;
378
379	data->udev = interface_to_usbdev(intf);
380
381	init_usb_anchor(&data->tx_anchor);
382	init_usb_anchor(&data->rx_anchor);
383
384	hdev = hci_alloc_dev();
385	if (!hdev)
386		return -ENOMEM;
387
388	hdev->bus = HCI_USB;
389	hci_set_drvdata(hdev, data);
390
391	data->hdev = hdev;
392	data->hu.hdev = hdev;
393
394	SET_HCIDEV_DEV(hdev, &intf->dev);
395
396	hdev->open     = bpa10x_open;
397	hdev->close    = bpa10x_close;
398	hdev->flush    = bpa10x_flush;
399	hdev->setup    = bpa10x_setup;
400	hdev->send     = bpa10x_send_frame;
401	hdev->set_diag = bpa10x_set_diag;
402
403	hci_set_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE);
404
405	err = hci_register_dev(hdev);
406	if (err < 0) {
407		hci_free_dev(hdev);
408		return err;
409	}
410
411	usb_set_intfdata(intf, data);
412
413	return 0;
414}
415
416static void bpa10x_disconnect(struct usb_interface *intf)
417{
418	struct bpa10x_data *data = usb_get_intfdata(intf);
419
420	BT_DBG("intf %p", intf);
421
422	if (!data)
423		return;
424
425	usb_set_intfdata(intf, NULL);
426
427	hci_unregister_dev(data->hdev);
428
429	hci_free_dev(data->hdev);
430	kfree_skb(data->rx_skb[0]);
431	kfree_skb(data->rx_skb[1]);
432}
433
434static struct usb_driver bpa10x_driver = {
435	.name		= "bpa10x",
436	.probe		= bpa10x_probe,
437	.disconnect	= bpa10x_disconnect,
438	.id_table	= bpa10x_table,
439	.disable_hub_initiated_lpm = 1,
440};
441
442module_usb_driver(bpa10x_driver);
443
444MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
445MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
446MODULE_VERSION(VERSION);
447MODULE_LICENSE("GPL");