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1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/module.h>
4#include <linux/virtio.h>
5#include <linux/virtio_config.h>
6#include <linux/skbuff.h>
7
8#include <uapi/linux/virtio_ids.h>
9#include <uapi/linux/virtio_bt.h>
10
11#include <net/bluetooth/bluetooth.h>
12#include <net/bluetooth/hci_core.h>
13
14#define VERSION "0.1"
15
16enum {
17 VIRTBT_VQ_TX,
18 VIRTBT_VQ_RX,
19 VIRTBT_NUM_VQS,
20};
21
22struct virtio_bluetooth {
23 struct virtio_device *vdev;
24 struct virtqueue *vqs[VIRTBT_NUM_VQS];
25 struct work_struct rx;
26 struct hci_dev *hdev;
27};
28
29static int virtbt_add_inbuf(struct virtio_bluetooth *vbt)
30{
31 struct virtqueue *vq = vbt->vqs[VIRTBT_VQ_RX];
32 struct scatterlist sg[1];
33 struct sk_buff *skb;
34 int err;
35
36 skb = alloc_skb(1000, GFP_KERNEL);
37 if (!skb)
38 return -ENOMEM;
39
40 sg_init_one(sg, skb->data, 1000);
41
42 err = virtqueue_add_inbuf(vq, sg, 1, skb, GFP_KERNEL);
43 if (err < 0) {
44 kfree_skb(skb);
45 return err;
46 }
47
48 return 0;
49}
50
51static int virtbt_open(struct hci_dev *hdev)
52{
53 return 0;
54}
55
56static int virtbt_open_vdev(struct virtio_bluetooth *vbt)
57{
58 if (virtbt_add_inbuf(vbt) < 0)
59 return -EIO;
60
61 virtqueue_kick(vbt->vqs[VIRTBT_VQ_RX]);
62 return 0;
63}
64
65static int virtbt_close(struct hci_dev *hdev)
66{
67 return 0;
68}
69
70static int virtbt_close_vdev(struct virtio_bluetooth *vbt)
71{
72 int i;
73
74 cancel_work_sync(&vbt->rx);
75
76 for (i = 0; i < ARRAY_SIZE(vbt->vqs); i++) {
77 struct virtqueue *vq = vbt->vqs[i];
78 struct sk_buff *skb;
79
80 while ((skb = virtqueue_detach_unused_buf(vq)))
81 kfree_skb(skb);
82 cond_resched();
83 }
84
85 return 0;
86}
87
88static int virtbt_flush(struct hci_dev *hdev)
89{
90 return 0;
91}
92
93static int virtbt_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
94{
95 struct virtio_bluetooth *vbt = hci_get_drvdata(hdev);
96 struct scatterlist sg[1];
97 int err;
98
99 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
100
101 sg_init_one(sg, skb->data, skb->len);
102 err = virtqueue_add_outbuf(vbt->vqs[VIRTBT_VQ_TX], sg, 1, skb,
103 GFP_KERNEL);
104 if (err) {
105 kfree_skb(skb);
106 return err;
107 }
108
109 virtqueue_kick(vbt->vqs[VIRTBT_VQ_TX]);
110 return 0;
111}
112
113static int virtbt_setup_zephyr(struct hci_dev *hdev)
114{
115 struct sk_buff *skb;
116
117 /* Read Build Information */
118 skb = __hci_cmd_sync(hdev, 0xfc08, 0, NULL, HCI_INIT_TIMEOUT);
119 if (IS_ERR(skb))
120 return PTR_ERR(skb);
121
122 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
123
124 hci_set_fw_info(hdev, "%s", skb->data + 1);
125
126 kfree_skb(skb);
127 return 0;
128}
129
130static int virtbt_set_bdaddr_zephyr(struct hci_dev *hdev,
131 const bdaddr_t *bdaddr)
132{
133 struct sk_buff *skb;
134
135 /* Write BD_ADDR */
136 skb = __hci_cmd_sync(hdev, 0xfc06, 6, bdaddr, HCI_INIT_TIMEOUT);
137 if (IS_ERR(skb))
138 return PTR_ERR(skb);
139
140 kfree_skb(skb);
141 return 0;
142}
143
144static int virtbt_setup_intel(struct hci_dev *hdev)
145{
146 struct sk_buff *skb;
147
148 /* Intel Read Version */
149 skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
150 if (IS_ERR(skb))
151 return PTR_ERR(skb);
152
153 kfree_skb(skb);
154 return 0;
155}
156
157static int virtbt_set_bdaddr_intel(struct hci_dev *hdev, const bdaddr_t *bdaddr)
158{
159 struct sk_buff *skb;
160
161 /* Intel Write BD Address */
162 skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
163 if (IS_ERR(skb))
164 return PTR_ERR(skb);
165
166 kfree_skb(skb);
167 return 0;
168}
169
170static int virtbt_setup_realtek(struct hci_dev *hdev)
171{
172 struct sk_buff *skb;
173
174 /* Read ROM Version */
175 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
176 if (IS_ERR(skb))
177 return PTR_ERR(skb);
178
179 bt_dev_info(hdev, "ROM version %u", *((__u8 *) (skb->data + 1)));
180
181 kfree_skb(skb);
182 return 0;
183}
184
185static int virtbt_shutdown_generic(struct hci_dev *hdev)
186{
187 struct sk_buff *skb;
188
189 /* Reset */
190 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
191 if (IS_ERR(skb))
192 return PTR_ERR(skb);
193
194 kfree_skb(skb);
195 return 0;
196}
197
198static void virtbt_rx_handle(struct virtio_bluetooth *vbt, struct sk_buff *skb)
199{
200 __u8 pkt_type;
201
202 pkt_type = *((__u8 *) skb->data);
203 skb_pull(skb, 1);
204
205 switch (pkt_type) {
206 case HCI_EVENT_PKT:
207 case HCI_ACLDATA_PKT:
208 case HCI_SCODATA_PKT:
209 case HCI_ISODATA_PKT:
210 hci_skb_pkt_type(skb) = pkt_type;
211 hci_recv_frame(vbt->hdev, skb);
212 break;
213 default:
214 kfree_skb(skb);
215 break;
216 }
217}
218
219static void virtbt_rx_work(struct work_struct *work)
220{
221 struct virtio_bluetooth *vbt = container_of(work,
222 struct virtio_bluetooth, rx);
223 struct sk_buff *skb;
224 unsigned int len;
225
226 skb = virtqueue_get_buf(vbt->vqs[VIRTBT_VQ_RX], &len);
227 if (!skb)
228 return;
229
230 skb_put(skb, len);
231 virtbt_rx_handle(vbt, skb);
232
233 if (virtbt_add_inbuf(vbt) < 0)
234 return;
235
236 virtqueue_kick(vbt->vqs[VIRTBT_VQ_RX]);
237}
238
239static void virtbt_tx_done(struct virtqueue *vq)
240{
241 struct sk_buff *skb;
242 unsigned int len;
243
244 while ((skb = virtqueue_get_buf(vq, &len)))
245 kfree_skb(skb);
246}
247
248static void virtbt_rx_done(struct virtqueue *vq)
249{
250 struct virtio_bluetooth *vbt = vq->vdev->priv;
251
252 schedule_work(&vbt->rx);
253}
254
255static int virtbt_probe(struct virtio_device *vdev)
256{
257 struct virtqueue_info vqs_info[VIRTBT_NUM_VQS] = {
258 [VIRTBT_VQ_TX] = { "tx", virtbt_tx_done },
259 [VIRTBT_VQ_RX] = { "rx", virtbt_rx_done },
260 };
261 struct virtio_bluetooth *vbt;
262 struct hci_dev *hdev;
263 int err;
264 __u8 type;
265
266 if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
267 return -ENODEV;
268
269 type = virtio_cread8(vdev, offsetof(struct virtio_bt_config, type));
270
271 switch (type) {
272 case VIRTIO_BT_CONFIG_TYPE_PRIMARY:
273 break;
274 default:
275 return -EINVAL;
276 }
277
278 vbt = kzalloc(sizeof(*vbt), GFP_KERNEL);
279 if (!vbt)
280 return -ENOMEM;
281
282 vdev->priv = vbt;
283 vbt->vdev = vdev;
284
285 INIT_WORK(&vbt->rx, virtbt_rx_work);
286
287 err = virtio_find_vqs(vdev, VIRTBT_NUM_VQS, vbt->vqs, vqs_info, NULL);
288 if (err)
289 return err;
290
291 hdev = hci_alloc_dev();
292 if (!hdev) {
293 err = -ENOMEM;
294 goto failed;
295 }
296
297 vbt->hdev = hdev;
298
299 hdev->bus = HCI_VIRTIO;
300 hci_set_drvdata(hdev, vbt);
301
302 hdev->open = virtbt_open;
303 hdev->close = virtbt_close;
304 hdev->flush = virtbt_flush;
305 hdev->send = virtbt_send_frame;
306
307 if (virtio_has_feature(vdev, VIRTIO_BT_F_VND_HCI)) {
308 __u16 vendor;
309
310 if (virtio_has_feature(vdev, VIRTIO_BT_F_CONFIG_V2))
311 virtio_cread(vdev, struct virtio_bt_config_v2,
312 vendor, &vendor);
313 else
314 virtio_cread(vdev, struct virtio_bt_config,
315 vendor, &vendor);
316
317 switch (vendor) {
318 case VIRTIO_BT_CONFIG_VENDOR_ZEPHYR:
319 hdev->manufacturer = 1521;
320 hdev->setup = virtbt_setup_zephyr;
321 hdev->shutdown = virtbt_shutdown_generic;
322 hdev->set_bdaddr = virtbt_set_bdaddr_zephyr;
323 break;
324
325 case VIRTIO_BT_CONFIG_VENDOR_INTEL:
326 hdev->manufacturer = 2;
327 hdev->setup = virtbt_setup_intel;
328 hdev->shutdown = virtbt_shutdown_generic;
329 hdev->set_bdaddr = virtbt_set_bdaddr_intel;
330 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
331 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
332 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
333 break;
334
335 case VIRTIO_BT_CONFIG_VENDOR_REALTEK:
336 hdev->manufacturer = 93;
337 hdev->setup = virtbt_setup_realtek;
338 hdev->shutdown = virtbt_shutdown_generic;
339 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
340 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
341 break;
342 }
343 }
344
345 if (virtio_has_feature(vdev, VIRTIO_BT_F_MSFT_EXT)) {
346 __u16 msft_opcode;
347
348 if (virtio_has_feature(vdev, VIRTIO_BT_F_CONFIG_V2))
349 virtio_cread(vdev, struct virtio_bt_config_v2,
350 msft_opcode, &msft_opcode);
351 else
352 virtio_cread(vdev, struct virtio_bt_config,
353 msft_opcode, &msft_opcode);
354
355 hci_set_msft_opcode(hdev, msft_opcode);
356 }
357
358 if (virtio_has_feature(vdev, VIRTIO_BT_F_AOSP_EXT))
359 hci_set_aosp_capable(hdev);
360
361 if (hci_register_dev(hdev) < 0) {
362 hci_free_dev(hdev);
363 err = -EBUSY;
364 goto failed;
365 }
366
367 virtio_device_ready(vdev);
368 err = virtbt_open_vdev(vbt);
369 if (err)
370 goto open_failed;
371
372 return 0;
373
374open_failed:
375 hci_free_dev(hdev);
376failed:
377 vdev->config->del_vqs(vdev);
378 return err;
379}
380
381static void virtbt_remove(struct virtio_device *vdev)
382{
383 struct virtio_bluetooth *vbt = vdev->priv;
384 struct hci_dev *hdev = vbt->hdev;
385
386 hci_unregister_dev(hdev);
387 virtio_reset_device(vdev);
388 virtbt_close_vdev(vbt);
389
390 hci_free_dev(hdev);
391 vbt->hdev = NULL;
392
393 vdev->config->del_vqs(vdev);
394 kfree(vbt);
395}
396
397static struct virtio_device_id virtbt_table[] = {
398 { VIRTIO_ID_BT, VIRTIO_DEV_ANY_ID },
399 { 0 },
400};
401
402MODULE_DEVICE_TABLE(virtio, virtbt_table);
403
404static const unsigned int virtbt_features[] = {
405 VIRTIO_BT_F_VND_HCI,
406 VIRTIO_BT_F_MSFT_EXT,
407 VIRTIO_BT_F_AOSP_EXT,
408 VIRTIO_BT_F_CONFIG_V2,
409};
410
411static struct virtio_driver virtbt_driver = {
412 .driver.name = KBUILD_MODNAME,
413 .feature_table = virtbt_features,
414 .feature_table_size = ARRAY_SIZE(virtbt_features),
415 .id_table = virtbt_table,
416 .probe = virtbt_probe,
417 .remove = virtbt_remove,
418};
419
420module_virtio_driver(virtbt_driver);
421
422MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
423MODULE_DESCRIPTION("Generic Bluetooth VIRTIO driver ver " VERSION);
424MODULE_VERSION(VERSION);
425MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/module.h>
4#include <linux/virtio.h>
5#include <linux/virtio_config.h>
6#include <linux/skbuff.h>
7
8#include <uapi/linux/virtio_ids.h>
9#include <uapi/linux/virtio_bt.h>
10
11#include <net/bluetooth/bluetooth.h>
12#include <net/bluetooth/hci_core.h>
13
14#define VERSION "0.1"
15
16enum {
17 VIRTBT_VQ_TX,
18 VIRTBT_VQ_RX,
19 VIRTBT_NUM_VQS,
20};
21
22struct virtio_bluetooth {
23 struct virtio_device *vdev;
24 struct virtqueue *vqs[VIRTBT_NUM_VQS];
25 struct work_struct rx;
26 struct hci_dev *hdev;
27};
28
29static int virtbt_add_inbuf(struct virtio_bluetooth *vbt)
30{
31 struct virtqueue *vq = vbt->vqs[VIRTBT_VQ_RX];
32 struct scatterlist sg[1];
33 struct sk_buff *skb;
34 int err;
35
36 skb = alloc_skb(1000, GFP_KERNEL);
37 if (!skb)
38 return -ENOMEM;
39
40 sg_init_one(sg, skb->data, 1000);
41
42 err = virtqueue_add_inbuf(vq, sg, 1, skb, GFP_KERNEL);
43 if (err < 0) {
44 kfree_skb(skb);
45 return err;
46 }
47
48 return 0;
49}
50
51static int virtbt_open(struct hci_dev *hdev)
52{
53 struct virtio_bluetooth *vbt = hci_get_drvdata(hdev);
54
55 if (virtbt_add_inbuf(vbt) < 0)
56 return -EIO;
57
58 virtqueue_kick(vbt->vqs[VIRTBT_VQ_RX]);
59 return 0;
60}
61
62static int virtbt_close(struct hci_dev *hdev)
63{
64 struct virtio_bluetooth *vbt = hci_get_drvdata(hdev);
65 int i;
66
67 cancel_work_sync(&vbt->rx);
68
69 for (i = 0; i < ARRAY_SIZE(vbt->vqs); i++) {
70 struct virtqueue *vq = vbt->vqs[i];
71 struct sk_buff *skb;
72
73 while ((skb = virtqueue_detach_unused_buf(vq)))
74 kfree_skb(skb);
75 }
76
77 return 0;
78}
79
80static int virtbt_flush(struct hci_dev *hdev)
81{
82 return 0;
83}
84
85static int virtbt_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
86{
87 struct virtio_bluetooth *vbt = hci_get_drvdata(hdev);
88 struct scatterlist sg[1];
89 int err;
90
91 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
92
93 sg_init_one(sg, skb->data, skb->len);
94 err = virtqueue_add_outbuf(vbt->vqs[VIRTBT_VQ_TX], sg, 1, skb,
95 GFP_KERNEL);
96 if (err) {
97 kfree_skb(skb);
98 return err;
99 }
100
101 virtqueue_kick(vbt->vqs[VIRTBT_VQ_TX]);
102 return 0;
103}
104
105static int virtbt_setup_zephyr(struct hci_dev *hdev)
106{
107 struct sk_buff *skb;
108
109 /* Read Build Information */
110 skb = __hci_cmd_sync(hdev, 0xfc08, 0, NULL, HCI_INIT_TIMEOUT);
111 if (IS_ERR(skb))
112 return PTR_ERR(skb);
113
114 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
115
116 hci_set_fw_info(hdev, "%s", skb->data + 1);
117
118 kfree_skb(skb);
119 return 0;
120}
121
122static int virtbt_set_bdaddr_zephyr(struct hci_dev *hdev,
123 const bdaddr_t *bdaddr)
124{
125 struct sk_buff *skb;
126
127 /* Write BD_ADDR */
128 skb = __hci_cmd_sync(hdev, 0xfc06, 6, bdaddr, HCI_INIT_TIMEOUT);
129 if (IS_ERR(skb))
130 return PTR_ERR(skb);
131
132 kfree_skb(skb);
133 return 0;
134}
135
136static int virtbt_setup_intel(struct hci_dev *hdev)
137{
138 struct sk_buff *skb;
139
140 /* Intel Read Version */
141 skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
142 if (IS_ERR(skb))
143 return PTR_ERR(skb);
144
145 kfree_skb(skb);
146 return 0;
147}
148
149static int virtbt_set_bdaddr_intel(struct hci_dev *hdev, const bdaddr_t *bdaddr)
150{
151 struct sk_buff *skb;
152
153 /* Intel Write BD Address */
154 skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
155 if (IS_ERR(skb))
156 return PTR_ERR(skb);
157
158 kfree_skb(skb);
159 return 0;
160}
161
162static int virtbt_setup_realtek(struct hci_dev *hdev)
163{
164 struct sk_buff *skb;
165
166 /* Read ROM Version */
167 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
168 if (IS_ERR(skb))
169 return PTR_ERR(skb);
170
171 bt_dev_info(hdev, "ROM version %u", *((__u8 *) (skb->data + 1)));
172
173 kfree_skb(skb);
174 return 0;
175}
176
177static int virtbt_shutdown_generic(struct hci_dev *hdev)
178{
179 struct sk_buff *skb;
180
181 /* Reset */
182 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
183 if (IS_ERR(skb))
184 return PTR_ERR(skb);
185
186 kfree_skb(skb);
187 return 0;
188}
189
190static void virtbt_rx_handle(struct virtio_bluetooth *vbt, struct sk_buff *skb)
191{
192 __u8 pkt_type;
193
194 pkt_type = *((__u8 *) skb->data);
195 skb_pull(skb, 1);
196
197 switch (pkt_type) {
198 case HCI_EVENT_PKT:
199 case HCI_ACLDATA_PKT:
200 case HCI_SCODATA_PKT:
201 case HCI_ISODATA_PKT:
202 hci_skb_pkt_type(skb) = pkt_type;
203 hci_recv_frame(vbt->hdev, skb);
204 break;
205 }
206}
207
208static void virtbt_rx_work(struct work_struct *work)
209{
210 struct virtio_bluetooth *vbt = container_of(work,
211 struct virtio_bluetooth, rx);
212 struct sk_buff *skb;
213 unsigned int len;
214
215 skb = virtqueue_get_buf(vbt->vqs[VIRTBT_VQ_RX], &len);
216 if (!skb)
217 return;
218
219 skb->len = len;
220 virtbt_rx_handle(vbt, skb);
221
222 if (virtbt_add_inbuf(vbt) < 0)
223 return;
224
225 virtqueue_kick(vbt->vqs[VIRTBT_VQ_RX]);
226}
227
228static void virtbt_tx_done(struct virtqueue *vq)
229{
230 struct sk_buff *skb;
231 unsigned int len;
232
233 while ((skb = virtqueue_get_buf(vq, &len)))
234 kfree_skb(skb);
235}
236
237static void virtbt_rx_done(struct virtqueue *vq)
238{
239 struct virtio_bluetooth *vbt = vq->vdev->priv;
240
241 schedule_work(&vbt->rx);
242}
243
244static int virtbt_probe(struct virtio_device *vdev)
245{
246 vq_callback_t *callbacks[VIRTBT_NUM_VQS] = {
247 [VIRTBT_VQ_TX] = virtbt_tx_done,
248 [VIRTBT_VQ_RX] = virtbt_rx_done,
249 };
250 const char *names[VIRTBT_NUM_VQS] = {
251 [VIRTBT_VQ_TX] = "tx",
252 [VIRTBT_VQ_RX] = "rx",
253 };
254 struct virtio_bluetooth *vbt;
255 struct hci_dev *hdev;
256 int err;
257 __u8 type;
258
259 if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
260 return -ENODEV;
261
262 type = virtio_cread8(vdev, offsetof(struct virtio_bt_config, type));
263
264 switch (type) {
265 case VIRTIO_BT_CONFIG_TYPE_PRIMARY:
266 case VIRTIO_BT_CONFIG_TYPE_AMP:
267 break;
268 default:
269 return -EINVAL;
270 }
271
272 vbt = kzalloc(sizeof(*vbt), GFP_KERNEL);
273 if (!vbt)
274 return -ENOMEM;
275
276 vdev->priv = vbt;
277 vbt->vdev = vdev;
278
279 INIT_WORK(&vbt->rx, virtbt_rx_work);
280
281 err = virtio_find_vqs(vdev, VIRTBT_NUM_VQS, vbt->vqs, callbacks,
282 names, NULL);
283 if (err)
284 return err;
285
286 hdev = hci_alloc_dev();
287 if (!hdev) {
288 err = -ENOMEM;
289 goto failed;
290 }
291
292 vbt->hdev = hdev;
293
294 hdev->bus = HCI_VIRTIO;
295 hdev->dev_type = type;
296 hci_set_drvdata(hdev, vbt);
297
298 hdev->open = virtbt_open;
299 hdev->close = virtbt_close;
300 hdev->flush = virtbt_flush;
301 hdev->send = virtbt_send_frame;
302
303 if (virtio_has_feature(vdev, VIRTIO_BT_F_VND_HCI)) {
304 __u16 vendor;
305
306 virtio_cread(vdev, struct virtio_bt_config, vendor, &vendor);
307
308 switch (vendor) {
309 case VIRTIO_BT_CONFIG_VENDOR_ZEPHYR:
310 hdev->manufacturer = 1521;
311 hdev->setup = virtbt_setup_zephyr;
312 hdev->shutdown = virtbt_shutdown_generic;
313 hdev->set_bdaddr = virtbt_set_bdaddr_zephyr;
314 break;
315
316 case VIRTIO_BT_CONFIG_VENDOR_INTEL:
317 hdev->manufacturer = 2;
318 hdev->setup = virtbt_setup_intel;
319 hdev->shutdown = virtbt_shutdown_generic;
320 hdev->set_bdaddr = virtbt_set_bdaddr_intel;
321 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
322 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
323 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
324 break;
325
326 case VIRTIO_BT_CONFIG_VENDOR_REALTEK:
327 hdev->manufacturer = 93;
328 hdev->setup = virtbt_setup_realtek;
329 hdev->shutdown = virtbt_shutdown_generic;
330 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
331 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
332 break;
333 }
334 }
335
336 if (virtio_has_feature(vdev, VIRTIO_BT_F_MSFT_EXT)) {
337 __u16 msft_opcode;
338
339 virtio_cread(vdev, struct virtio_bt_config,
340 msft_opcode, &msft_opcode);
341
342 hci_set_msft_opcode(hdev, msft_opcode);
343 }
344
345 if (virtio_has_feature(vdev, VIRTIO_BT_F_AOSP_EXT))
346 hci_set_aosp_capable(hdev);
347
348 if (hci_register_dev(hdev) < 0) {
349 hci_free_dev(hdev);
350 err = -EBUSY;
351 goto failed;
352 }
353
354 return 0;
355
356failed:
357 vdev->config->del_vqs(vdev);
358 return err;
359}
360
361static void virtbt_remove(struct virtio_device *vdev)
362{
363 struct virtio_bluetooth *vbt = vdev->priv;
364 struct hci_dev *hdev = vbt->hdev;
365
366 hci_unregister_dev(hdev);
367 vdev->config->reset(vdev);
368
369 hci_free_dev(hdev);
370 vbt->hdev = NULL;
371
372 vdev->config->del_vqs(vdev);
373 kfree(vbt);
374}
375
376static struct virtio_device_id virtbt_table[] = {
377 { VIRTIO_ID_BT, VIRTIO_DEV_ANY_ID },
378 { 0 },
379};
380
381MODULE_DEVICE_TABLE(virtio, virtbt_table);
382
383static const unsigned int virtbt_features[] = {
384 VIRTIO_BT_F_VND_HCI,
385 VIRTIO_BT_F_MSFT_EXT,
386 VIRTIO_BT_F_AOSP_EXT,
387};
388
389static struct virtio_driver virtbt_driver = {
390 .driver.name = KBUILD_MODNAME,
391 .driver.owner = THIS_MODULE,
392 .feature_table = virtbt_features,
393 .feature_table_size = ARRAY_SIZE(virtbt_features),
394 .id_table = virtbt_table,
395 .probe = virtbt_probe,
396 .remove = virtbt_remove,
397};
398
399module_virtio_driver(virtbt_driver);
400
401MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
402MODULE_DESCRIPTION("Generic Bluetooth VIRTIO driver ver " VERSION);
403MODULE_VERSION(VERSION);
404MODULE_LICENSE("GPL");