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23#include <linux/module.h>
24
25#include <linux/kernel.h>
26#include <linux/init.h>
27#include <linux/slab.h>
28#include <linux/types.h>
29#include <linux/delay.h>
30#include <linux/errno.h>
31#include <linux/ptrace.h>
32#include <linux/ioport.h>
33#include <linux/spinlock.h>
34#include <linux/moduleparam.h>
35
36#include <linux/skbuff.h>
37#include <linux/string.h>
38#include <linux/serial.h>
39#include <linux/serial_reg.h>
40#include <linux/bitops.h>
41#include <asm/io.h>
42
43#include <pcmcia/cistpl.h>
44#include <pcmcia/ciscode.h>
45#include <pcmcia/ds.h>
46#include <pcmcia/cisreg.h>
47
48#include <net/bluetooth/bluetooth.h>
49#include <net/bluetooth/hci_core.h>
50
51
52
53
54
55
56MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
57MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
58MODULE_LICENSE("GPL");
59
60
61
62
63
64
65struct dtl1_info {
66 struct pcmcia_device *p_dev;
67
68 struct hci_dev *hdev;
69
70 spinlock_t lock;
71
72 unsigned long flowmask;
73 int ri_latch;
74
75 struct sk_buff_head txq;
76 unsigned long tx_state;
77
78 unsigned long rx_state;
79 unsigned long rx_count;
80 struct sk_buff *rx_skb;
81};
82
83
84static int dtl1_config(struct pcmcia_device *link);
85
86
87
88#define XMIT_SENDING 1
89#define XMIT_WAKEUP 2
90#define XMIT_WAITING 8
91
92
93#define RECV_WAIT_NSH 0
94#define RECV_WAIT_DATA 1
95
96
97struct nsh {
98 u8 type;
99 u8 zero;
100 u16 len;
101} __packed;
102
103#define NSHL 4
104
105
106
107
108
109
110static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
111{
112 int actual = 0;
113
114
115 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
116 return 0;
117
118
119 while ((fifo_size-- > 0) && (actual < len)) {
120
121 outb(buf[actual], iobase + UART_TX);
122 actual++;
123 }
124
125 return actual;
126}
127
128
129static void dtl1_write_wakeup(struct dtl1_info *info)
130{
131 if (!info) {
132 BT_ERR("Unknown device");
133 return;
134 }
135
136 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
137 set_bit(XMIT_WAKEUP, &(info->tx_state));
138 return;
139 }
140
141 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
142 set_bit(XMIT_WAKEUP, &(info->tx_state));
143 return;
144 }
145
146 do {
147 unsigned int iobase = info->p_dev->resource[0]->start;
148 register struct sk_buff *skb;
149 int len;
150
151 clear_bit(XMIT_WAKEUP, &(info->tx_state));
152
153 if (!pcmcia_dev_present(info->p_dev))
154 return;
155
156 skb = skb_dequeue(&(info->txq));
157 if (!skb)
158 break;
159
160
161 len = dtl1_write(iobase, 32, skb->data, skb->len);
162
163 if (len == skb->len) {
164 set_bit(XMIT_WAITING, &(info->tx_state));
165 kfree_skb(skb);
166 } else {
167 skb_pull(skb, len);
168 skb_queue_head(&(info->txq), skb);
169 }
170
171 info->hdev->stat.byte_tx += len;
172
173 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
174
175 clear_bit(XMIT_SENDING, &(info->tx_state));
176}
177
178
179static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb)
180{
181 u8 flowmask = *(u8 *)skb->data;
182 int i;
183
184 printk(KERN_INFO "Bluetooth: Nokia control data =");
185 for (i = 0; i < skb->len; i++) {
186 printk(" %02x", skb->data[i]);
187 }
188 printk("\n");
189
190
191 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
192 clear_bit(XMIT_WAITING, &(info->tx_state));
193 dtl1_write_wakeup(info);
194 }
195
196 info->flowmask = flowmask;
197
198 kfree_skb(skb);
199}
200
201
202static void dtl1_receive(struct dtl1_info *info)
203{
204 unsigned int iobase;
205 struct nsh *nsh;
206 int boguscount = 0;
207
208 if (!info) {
209 BT_ERR("Unknown device");
210 return;
211 }
212
213 iobase = info->p_dev->resource[0]->start;
214
215 do {
216 info->hdev->stat.byte_rx++;
217
218
219 if (info->rx_skb == NULL) {
220 info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
221 if (!info->rx_skb) {
222 BT_ERR("Can't allocate mem for new packet");
223 info->rx_state = RECV_WAIT_NSH;
224 info->rx_count = NSHL;
225 return;
226 }
227 }
228
229 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
230 nsh = (struct nsh *)info->rx_skb->data;
231
232 info->rx_count--;
233
234 if (info->rx_count == 0) {
235
236 switch (info->rx_state) {
237 case RECV_WAIT_NSH:
238 info->rx_state = RECV_WAIT_DATA;
239 info->rx_count = nsh->len + (nsh->len & 0x0001);
240 break;
241 case RECV_WAIT_DATA:
242 bt_cb(info->rx_skb)->pkt_type = nsh->type;
243
244
245 if (nsh->len & 0x0001) {
246 info->rx_skb->tail--;
247 info->rx_skb->len--;
248 }
249
250
251 skb_pull(info->rx_skb, NSHL);
252
253 switch (bt_cb(info->rx_skb)->pkt_type) {
254 case 0x80:
255
256 dtl1_control(info, info->rx_skb);
257 break;
258 case 0x82:
259 case 0x83:
260 case 0x84:
261
262 bt_cb(info->rx_skb)->pkt_type &= 0x0f;
263 hci_recv_frame(info->hdev, info->rx_skb);
264 break;
265 default:
266
267 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
268 kfree_skb(info->rx_skb);
269 break;
270 }
271
272 info->rx_state = RECV_WAIT_NSH;
273 info->rx_count = NSHL;
274 info->rx_skb = NULL;
275 break;
276 }
277
278 }
279
280
281 if (boguscount++ > 32)
282 break;
283
284 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
285}
286
287
288static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
289{
290 struct dtl1_info *info = dev_inst;
291 unsigned int iobase;
292 unsigned char msr;
293 int boguscount = 0;
294 int iir, lsr;
295 irqreturn_t r = IRQ_NONE;
296
297 if (!info || !info->hdev)
298
299 return IRQ_NONE;
300
301 iobase = info->p_dev->resource[0]->start;
302
303 spin_lock(&(info->lock));
304
305 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
306 while (iir) {
307
308 r = IRQ_HANDLED;
309
310 lsr = inb(iobase + UART_LSR);
311
312 switch (iir) {
313 case UART_IIR_RLSI:
314 BT_ERR("RLSI");
315 break;
316 case UART_IIR_RDI:
317
318 dtl1_receive(info);
319 break;
320 case UART_IIR_THRI:
321 if (lsr & UART_LSR_THRE) {
322
323 dtl1_write_wakeup(info);
324 }
325 break;
326 default:
327 BT_ERR("Unhandled IIR=%#x", iir);
328 break;
329 }
330
331
332 if (boguscount++ > 100)
333 break;
334
335 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
336
337 }
338
339 msr = inb(iobase + UART_MSR);
340
341 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
342 info->ri_latch = msr & UART_MSR_RI;
343 clear_bit(XMIT_WAITING, &(info->tx_state));
344 dtl1_write_wakeup(info);
345 r = IRQ_HANDLED;
346 }
347
348 spin_unlock(&(info->lock));
349
350 return r;
351}
352
353
354
355
356
357
358static int dtl1_hci_open(struct hci_dev *hdev)
359{
360 set_bit(HCI_RUNNING, &(hdev->flags));
361
362 return 0;
363}
364
365
366static int dtl1_hci_flush(struct hci_dev *hdev)
367{
368 struct dtl1_info *info = hci_get_drvdata(hdev);
369
370
371 skb_queue_purge(&(info->txq));
372
373 return 0;
374}
375
376
377static int dtl1_hci_close(struct hci_dev *hdev)
378{
379 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
380 return 0;
381
382 dtl1_hci_flush(hdev);
383
384 return 0;
385}
386
387
388static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
389{
390 struct dtl1_info *info = hci_get_drvdata(hdev);
391 struct sk_buff *s;
392 struct nsh nsh;
393
394 switch (bt_cb(skb)->pkt_type) {
395 case HCI_COMMAND_PKT:
396 hdev->stat.cmd_tx++;
397 nsh.type = 0x81;
398 break;
399 case HCI_ACLDATA_PKT:
400 hdev->stat.acl_tx++;
401 nsh.type = 0x82;
402 break;
403 case HCI_SCODATA_PKT:
404 hdev->stat.sco_tx++;
405 nsh.type = 0x83;
406 break;
407 default:
408 return -EILSEQ;
409 };
410
411 nsh.zero = 0;
412 nsh.len = skb->len;
413
414 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
415 if (!s)
416 return -ENOMEM;
417
418 skb_reserve(s, NSHL);
419 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
420 if (skb->len & 0x0001)
421 *skb_put(s, 1) = 0;
422
423
424 memcpy(skb_push(s, NSHL), &nsh, NSHL);
425 skb_queue_tail(&(info->txq), s);
426
427 dtl1_write_wakeup(info);
428
429 kfree_skb(skb);
430
431 return 0;
432}
433
434
435
436
437
438
439static int dtl1_open(struct dtl1_info *info)
440{
441 unsigned long flags;
442 unsigned int iobase = info->p_dev->resource[0]->start;
443 struct hci_dev *hdev;
444
445 spin_lock_init(&(info->lock));
446
447 skb_queue_head_init(&(info->txq));
448
449 info->rx_state = RECV_WAIT_NSH;
450 info->rx_count = NSHL;
451 info->rx_skb = NULL;
452
453 set_bit(XMIT_WAITING, &(info->tx_state));
454
455
456 hdev = hci_alloc_dev();
457 if (!hdev) {
458 BT_ERR("Can't allocate HCI device");
459 return -ENOMEM;
460 }
461
462 info->hdev = hdev;
463
464 hdev->bus = HCI_PCCARD;
465 hci_set_drvdata(hdev, info);
466 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
467
468 hdev->open = dtl1_hci_open;
469 hdev->close = dtl1_hci_close;
470 hdev->flush = dtl1_hci_flush;
471 hdev->send = dtl1_hci_send_frame;
472
473 spin_lock_irqsave(&(info->lock), flags);
474
475
476 outb(0, iobase + UART_MCR);
477
478
479 outb(0, iobase + UART_IER);
480
481
482 outb(UART_LCR_WLEN8, iobase + UART_LCR);
483 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
484
485 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
486 & UART_MSR_RI;
487
488
489 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
490
491 spin_unlock_irqrestore(&(info->lock), flags);
492
493
494 msleep(2000);
495
496
497 if (hci_register_dev(hdev) < 0) {
498 BT_ERR("Can't register HCI device");
499 info->hdev = NULL;
500 hci_free_dev(hdev);
501 return -ENODEV;
502 }
503
504 return 0;
505}
506
507
508static int dtl1_close(struct dtl1_info *info)
509{
510 unsigned long flags;
511 unsigned int iobase = info->p_dev->resource[0]->start;
512 struct hci_dev *hdev = info->hdev;
513
514 if (!hdev)
515 return -ENODEV;
516
517 dtl1_hci_close(hdev);
518
519 spin_lock_irqsave(&(info->lock), flags);
520
521
522 outb(0, iobase + UART_MCR);
523
524
525 outb(0, iobase + UART_IER);
526
527 spin_unlock_irqrestore(&(info->lock), flags);
528
529 hci_unregister_dev(hdev);
530 hci_free_dev(hdev);
531
532 return 0;
533}
534
535static int dtl1_probe(struct pcmcia_device *link)
536{
537 struct dtl1_info *info;
538
539
540 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
541 if (!info)
542 return -ENOMEM;
543
544 info->p_dev = link;
545 link->priv = info;
546
547 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
548
549 return dtl1_config(link);
550}
551
552
553static void dtl1_detach(struct pcmcia_device *link)
554{
555 struct dtl1_info *info = link->priv;
556
557 dtl1_close(info);
558 pcmcia_disable_device(link);
559}
560
561static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
562{
563 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
564 return -ENODEV;
565
566 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
567 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
568
569 return pcmcia_request_io(p_dev);
570}
571
572static int dtl1_config(struct pcmcia_device *link)
573{
574 struct dtl1_info *info = link->priv;
575 int ret;
576
577
578 link->resource[0]->end = 8;
579 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
580 if (ret)
581 goto failed;
582
583 ret = pcmcia_request_irq(link, dtl1_interrupt);
584 if (ret)
585 goto failed;
586
587 ret = pcmcia_enable_device(link);
588 if (ret)
589 goto failed;
590
591 ret = dtl1_open(info);
592 if (ret)
593 goto failed;
594
595 return 0;
596
597failed:
598 dtl1_detach(link);
599 return ret;
600}
601
602static const struct pcmcia_device_id dtl1_ids[] = {
603 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
604 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
605 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
606 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
607 PCMCIA_DEVICE_NULL
608};
609MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
610
611static struct pcmcia_driver dtl1_driver = {
612 .owner = THIS_MODULE,
613 .name = "dtl1_cs",
614 .probe = dtl1_probe,
615 .remove = dtl1_detach,
616 .id_table = dtl1_ids,
617};
618module_pcmcia_driver(dtl1_driver);
619
