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25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/types.h>
30#include <linux/sched.h>
31#include <linux/errno.h>
32#include <linux/skbuff.h>
33
34#include <linux/mmc/host.h>
35#include <linux/mmc/sdio_ids.h>
36#include <linux/mmc/sdio_func.h>
37
38#include <net/bluetooth/bluetooth.h>
39#include <net/bluetooth/hci_core.h>
40
41#define VERSION "0.1"
42
43static const struct sdio_device_id btsdio_table[] = {
44
45 { SDIO_DEVICE_CLASS(SDIO_CLASS_BT_A) },
46
47
48 { SDIO_DEVICE_CLASS(SDIO_CLASS_BT_B) },
49
50
51 { SDIO_DEVICE_CLASS(SDIO_CLASS_BT_AMP) },
52
53 { }
54};
55
56MODULE_DEVICE_TABLE(sdio, btsdio_table);
57
58struct btsdio_data {
59 struct hci_dev *hdev;
60 struct sdio_func *func;
61
62 struct work_struct work;
63
64 struct sk_buff_head txq;
65};
66
67#define REG_RDAT 0x00
68#define REG_TDAT 0x00
69#define REG_PC_RRT 0x10
70#define REG_PC_WRT 0x11
71#define REG_RTC_STAT 0x12
72#define REG_RTC_SET 0x12
73#define REG_INTRD 0x13
74#define REG_CL_INTRD 0x13
75#define REG_EN_INTRD 0x14
76#define REG_MD_STAT 0x20
77#define REG_MD_SET 0x20
78
79static int btsdio_tx_packet(struct btsdio_data *data, struct sk_buff *skb)
80{
81 int err;
82
83 BT_DBG("%s", data->hdev->name);
84
85
86 skb_push(skb, 4);
87 skb->data[0] = (skb->len & 0x0000ff);
88 skb->data[1] = (skb->len & 0x00ff00) >> 8;
89 skb->data[2] = (skb->len & 0xff0000) >> 16;
90 skb->data[3] = hci_skb_pkt_type(skb);
91
92 err = sdio_writesb(data->func, REG_TDAT, skb->data, skb->len);
93 if (err < 0) {
94 skb_pull(skb, 4);
95 sdio_writeb(data->func, 0x01, REG_PC_WRT, NULL);
96 return err;
97 }
98
99 data->hdev->stat.byte_tx += skb->len;
100
101 kfree_skb(skb);
102
103 return 0;
104}
105
106static void btsdio_work(struct work_struct *work)
107{
108 struct btsdio_data *data = container_of(work, struct btsdio_data, work);
109 struct sk_buff *skb;
110 int err;
111
112 BT_DBG("%s", data->hdev->name);
113
114 sdio_claim_host(data->func);
115
116 while ((skb = skb_dequeue(&data->txq))) {
117 err = btsdio_tx_packet(data, skb);
118 if (err < 0) {
119 data->hdev->stat.err_tx++;
120 skb_queue_head(&data->txq, skb);
121 break;
122 }
123 }
124
125 sdio_release_host(data->func);
126}
127
128static int btsdio_rx_packet(struct btsdio_data *data)
129{
130 u8 hdr[4] __attribute__ ((aligned(4)));
131 struct sk_buff *skb;
132 int err, len;
133
134 BT_DBG("%s", data->hdev->name);
135
136 err = sdio_readsb(data->func, hdr, REG_RDAT, 4);
137 if (err < 0)
138 return err;
139
140 len = hdr[0] | (hdr[1] << 8) | (hdr[2] << 16);
141 if (len < 4 || len > 65543)
142 return -EILSEQ;
143
144 skb = bt_skb_alloc(len - 4, GFP_KERNEL);
145 if (!skb) {
146
147
148
149
150 return -ENOMEM;
151 }
152
153 skb_put(skb, len - 4);
154
155 err = sdio_readsb(data->func, skb->data, REG_RDAT, len - 4);
156 if (err < 0) {
157 kfree_skb(skb);
158 return err;
159 }
160
161 data->hdev->stat.byte_rx += len;
162
163 switch (hdr[3]) {
164 case HCI_EVENT_PKT:
165 case HCI_ACLDATA_PKT:
166 case HCI_SCODATA_PKT:
167 case HCI_ISODATA_PKT:
168 hci_skb_pkt_type(skb) = hdr[3];
169 err = hci_recv_frame(data->hdev, skb);
170 if (err < 0)
171 return err;
172 break;
173 default:
174 kfree_skb(skb);
175 return -EINVAL;
176 }
177
178 sdio_writeb(data->func, 0x00, REG_PC_RRT, NULL);
179
180 return 0;
181}
182
183static void btsdio_interrupt(struct sdio_func *func)
184{
185 struct btsdio_data *data = sdio_get_drvdata(func);
186 int intrd;
187
188 BT_DBG("%s", data->hdev->name);
189
190 intrd = sdio_readb(func, REG_INTRD, NULL);
191 if (intrd & 0x01) {
192 sdio_writeb(func, 0x01, REG_CL_INTRD, NULL);
193
194 if (btsdio_rx_packet(data) < 0) {
195 data->hdev->stat.err_rx++;
196 sdio_writeb(data->func, 0x01, REG_PC_RRT, NULL);
197 }
198 }
199}
200
201static int btsdio_open(struct hci_dev *hdev)
202{
203 struct btsdio_data *data = hci_get_drvdata(hdev);
204 int err;
205
206 BT_DBG("%s", hdev->name);
207
208 sdio_claim_host(data->func);
209
210 err = sdio_enable_func(data->func);
211 if (err < 0)
212 goto release;
213
214 err = sdio_claim_irq(data->func, btsdio_interrupt);
215 if (err < 0) {
216 sdio_disable_func(data->func);
217 goto release;
218 }
219
220 if (data->func->class == SDIO_CLASS_BT_B)
221 sdio_writeb(data->func, 0x00, REG_MD_SET, NULL);
222
223 sdio_writeb(data->func, 0x01, REG_EN_INTRD, NULL);
224
225release:
226 sdio_release_host(data->func);
227
228 return err;
229}
230
231static int btsdio_close(struct hci_dev *hdev)
232{
233 struct btsdio_data *data = hci_get_drvdata(hdev);
234
235 BT_DBG("%s", hdev->name);
236
237 sdio_claim_host(data->func);
238
239 sdio_writeb(data->func, 0x00, REG_EN_INTRD, NULL);
240
241 sdio_release_irq(data->func);
242 sdio_disable_func(data->func);
243
244 sdio_release_host(data->func);
245
246 return 0;
247}
248
249static int btsdio_flush(struct hci_dev *hdev)
250{
251 struct btsdio_data *data = hci_get_drvdata(hdev);
252
253 BT_DBG("%s", hdev->name);
254
255 skb_queue_purge(&data->txq);
256
257 return 0;
258}
259
260static int btsdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
261{
262 struct btsdio_data *data = hci_get_drvdata(hdev);
263
264 BT_DBG("%s", hdev->name);
265
266 switch (hci_skb_pkt_type(skb)) {
267 case HCI_COMMAND_PKT:
268 hdev->stat.cmd_tx++;
269 break;
270
271 case HCI_ACLDATA_PKT:
272 hdev->stat.acl_tx++;
273 break;
274
275 case HCI_SCODATA_PKT:
276 hdev->stat.sco_tx++;
277 break;
278
279 default:
280 return -EILSEQ;
281 }
282
283 skb_queue_tail(&data->txq, skb);
284
285 schedule_work(&data->work);
286
287 return 0;
288}
289
290static int btsdio_probe(struct sdio_func *func,
291 const struct sdio_device_id *id)
292{
293 struct btsdio_data *data;
294 struct hci_dev *hdev;
295 struct sdio_func_tuple *tuple = func->tuples;
296 int err;
297
298 BT_DBG("func %p id %p class 0x%04x", func, id, func->class);
299
300 while (tuple) {
301 BT_DBG("code 0x%x size %d", tuple->code, tuple->size);
302 tuple = tuple->next;
303 }
304
305
306
307
308 if (func->vendor == SDIO_VENDOR_ID_BROADCOM &&
309 !mmc_card_is_removable(func->card->host)) {
310 switch (func->device) {
311 case SDIO_DEVICE_ID_BROADCOM_43341:
312 case SDIO_DEVICE_ID_BROADCOM_43430:
313 case SDIO_DEVICE_ID_BROADCOM_4356:
314 return -ENODEV;
315 }
316 }
317
318 data = devm_kzalloc(&func->dev, sizeof(*data), GFP_KERNEL);
319 if (!data)
320 return -ENOMEM;
321
322 data->func = func;
323
324 INIT_WORK(&data->work, btsdio_work);
325
326 skb_queue_head_init(&data->txq);
327
328 hdev = hci_alloc_dev();
329 if (!hdev)
330 return -ENOMEM;
331
332 hdev->bus = HCI_SDIO;
333 hci_set_drvdata(hdev, data);
334
335 if (id->class == SDIO_CLASS_BT_AMP)
336 hdev->dev_type = HCI_AMP;
337 else
338 hdev->dev_type = HCI_PRIMARY;
339
340 data->hdev = hdev;
341
342 SET_HCIDEV_DEV(hdev, &func->dev);
343
344 hdev->open = btsdio_open;
345 hdev->close = btsdio_close;
346 hdev->flush = btsdio_flush;
347 hdev->send = btsdio_send_frame;
348
349 if (func->vendor == 0x0104 && func->device == 0x00c5)
350 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
351
352 err = hci_register_dev(hdev);
353 if (err < 0) {
354 hci_free_dev(hdev);
355 return err;
356 }
357
358 sdio_set_drvdata(func, data);
359
360 return 0;
361}
362
363static void btsdio_remove(struct sdio_func *func)
364{
365 struct btsdio_data *data = sdio_get_drvdata(func);
366 struct hci_dev *hdev;
367
368 BT_DBG("func %p", func);
369
370 if (!data)
371 return;
372
373 hdev = data->hdev;
374
375 sdio_set_drvdata(func, NULL);
376
377 hci_unregister_dev(hdev);
378
379 hci_free_dev(hdev);
380}
381
382static struct sdio_driver btsdio_driver = {
383 .name = "btsdio",
384 .probe = btsdio_probe,
385 .remove = btsdio_remove,
386 .id_table = btsdio_table,
387};
388
389static int __init btsdio_init(void)
390{
391 BT_INFO("Generic Bluetooth SDIO driver ver %s", VERSION);
392
393 return sdio_register_driver(&btsdio_driver);
394}
395
396static void __exit btsdio_exit(void)
397{
398 sdio_unregister_driver(&btsdio_driver);
399}
400
401module_init(btsdio_init);
402module_exit(btsdio_exit);
403
404MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
405MODULE_DESCRIPTION("Generic Bluetooth SDIO driver ver " VERSION);
406MODULE_VERSION(VERSION);
407MODULE_LICENSE("GPL");
408
