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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/system.h>
42#include <asm/io.h>
43
44#include <pcmcia/cistpl.h>
45#include <pcmcia/ciscode.h>
46#include <pcmcia/ds.h>
47#include <pcmcia/cisreg.h>
48
49#include <net/bluetooth/bluetooth.h>
50#include <net/bluetooth/hci_core.h>
51
52
53
54
55
56
57MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
58MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
59MODULE_LICENSE("GPL");
60
61
62
63
64
65
66typedef struct dtl1_info_t {
67 struct pcmcia_device *p_dev;
68
69 struct hci_dev *hdev;
70
71 spinlock_t lock;
72
73 unsigned long flowmask;
74 int ri_latch;
75
76 struct sk_buff_head txq;
77 unsigned long tx_state;
78
79 unsigned long rx_state;
80 unsigned long rx_count;
81 struct sk_buff *rx_skb;
82} dtl1_info_t;
83
84
85static int dtl1_config(struct pcmcia_device *link);
86static void dtl1_release(struct pcmcia_device *link);
87
88static void dtl1_detach(struct pcmcia_device *p_dev);
89
90
91
92#define XMIT_SENDING 1
93#define XMIT_WAKEUP 2
94#define XMIT_WAITING 8
95
96
97#define RECV_WAIT_NSH 0
98#define RECV_WAIT_DATA 1
99
100
101typedef struct {
102 u8 type;
103 u8 zero;
104 u16 len;
105} __packed nsh_t;
106
107#define NSHL 4
108
109
110
111
112
113
114static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
115{
116 int actual = 0;
117
118
119 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
120 return 0;
121
122
123 while ((fifo_size-- > 0) && (actual < len)) {
124
125 outb(buf[actual], iobase + UART_TX);
126 actual++;
127 }
128
129 return actual;
130}
131
132
133static void dtl1_write_wakeup(dtl1_info_t *info)
134{
135 if (!info) {
136 BT_ERR("Unknown device");
137 return;
138 }
139
140 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
141 set_bit(XMIT_WAKEUP, &(info->tx_state));
142 return;
143 }
144
145 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
146 set_bit(XMIT_WAKEUP, &(info->tx_state));
147 return;
148 }
149
150 do {
151 register unsigned int iobase = info->p_dev->resource[0]->start;
152 register struct sk_buff *skb;
153 register int len;
154
155 clear_bit(XMIT_WAKEUP, &(info->tx_state));
156
157 if (!pcmcia_dev_present(info->p_dev))
158 return;
159
160 if (!(skb = skb_dequeue(&(info->txq))))
161 break;
162
163
164 len = dtl1_write(iobase, 32, skb->data, skb->len);
165
166 if (len == skb->len) {
167 set_bit(XMIT_WAITING, &(info->tx_state));
168 kfree_skb(skb);
169 } else {
170 skb_pull(skb, len);
171 skb_queue_head(&(info->txq), skb);
172 }
173
174 info->hdev->stat.byte_tx += len;
175
176 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
177
178 clear_bit(XMIT_SENDING, &(info->tx_state));
179}
180
181
182static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
183{
184 u8 flowmask = *(u8 *)skb->data;
185 int i;
186
187 printk(KERN_INFO "Bluetooth: Nokia control data =");
188 for (i = 0; i < skb->len; i++) {
189 printk(" %02x", skb->data[i]);
190 }
191 printk("\n");
192
193
194 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
195 clear_bit(XMIT_WAITING, &(info->tx_state));
196 dtl1_write_wakeup(info);
197 }
198
199 info->flowmask = flowmask;
200
201 kfree_skb(skb);
202}
203
204
205static void dtl1_receive(dtl1_info_t *info)
206{
207 unsigned int iobase;
208 nsh_t *nsh;
209 int boguscount = 0;
210
211 if (!info) {
212 BT_ERR("Unknown device");
213 return;
214 }
215
216 iobase = info->p_dev->resource[0]->start;
217
218 do {
219 info->hdev->stat.byte_rx++;
220
221
222 if (info->rx_skb == NULL)
223 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
224 BT_ERR("Can't allocate mem for new packet");
225 info->rx_state = RECV_WAIT_NSH;
226 info->rx_count = NSHL;
227 return;
228 }
229
230 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
231 nsh = (nsh_t *)info->rx_skb->data;
232
233 info->rx_count--;
234
235 if (info->rx_count == 0) {
236
237 switch (info->rx_state) {
238 case RECV_WAIT_NSH:
239 info->rx_state = RECV_WAIT_DATA;
240 info->rx_count = nsh->len + (nsh->len & 0x0001);
241 break;
242 case RECV_WAIT_DATA:
243 bt_cb(info->rx_skb)->pkt_type = nsh->type;
244
245
246 if (nsh->len & 0x0001) {
247 info->rx_skb->tail--;
248 info->rx_skb->len--;
249 }
250
251
252 skb_pull(info->rx_skb, NSHL);
253
254 switch (bt_cb(info->rx_skb)->pkt_type) {
255 case 0x80:
256
257 dtl1_control(info, info->rx_skb);
258 break;
259 case 0x82:
260 case 0x83:
261 case 0x84:
262
263 info->rx_skb->dev = (void *) info->hdev;
264 bt_cb(info->rx_skb)->pkt_type &= 0x0f;
265 hci_recv_frame(info->rx_skb);
266 break;
267 default:
268
269 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
270 kfree_skb(info->rx_skb);
271 break;
272 }
273
274 info->rx_state = RECV_WAIT_NSH;
275 info->rx_count = NSHL;
276 info->rx_skb = NULL;
277 break;
278 }
279
280 }
281
282
283 if (boguscount++ > 32)
284 break;
285
286 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
287}
288
289
290static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
291{
292 dtl1_info_t *info = dev_inst;
293 unsigned int iobase;
294 unsigned char msr;
295 int boguscount = 0;
296 int iir, lsr;
297 irqreturn_t r = IRQ_NONE;
298
299 if (!info || !info->hdev)
300
301 return IRQ_NONE;
302
303 iobase = info->p_dev->resource[0]->start;
304
305 spin_lock(&(info->lock));
306
307 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
308 while (iir) {
309
310 r = IRQ_HANDLED;
311
312 lsr = inb(iobase + UART_LSR);
313
314 switch (iir) {
315 case UART_IIR_RLSI:
316 BT_ERR("RLSI");
317 break;
318 case UART_IIR_RDI:
319
320 dtl1_receive(info);
321 break;
322 case UART_IIR_THRI:
323 if (lsr & UART_LSR_THRE) {
324
325 dtl1_write_wakeup(info);
326 }
327 break;
328 default:
329 BT_ERR("Unhandled IIR=%#x", iir);
330 break;
331 }
332
333
334 if (boguscount++ > 100)
335 break;
336
337 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
338
339 }
340
341 msr = inb(iobase + UART_MSR);
342
343 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
344 info->ri_latch = msr & UART_MSR_RI;
345 clear_bit(XMIT_WAITING, &(info->tx_state));
346 dtl1_write_wakeup(info);
347 r = IRQ_HANDLED;
348 }
349
350 spin_unlock(&(info->lock));
351
352 return r;
353}
354
355
356
357
358
359
360static int dtl1_hci_open(struct hci_dev *hdev)
361{
362 set_bit(HCI_RUNNING, &(hdev->flags));
363
364 return 0;
365}
366
367
368static int dtl1_hci_flush(struct hci_dev *hdev)
369{
370 dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
371
372
373 skb_queue_purge(&(info->txq));
374
375 return 0;
376}
377
378
379static int dtl1_hci_close(struct hci_dev *hdev)
380{
381 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
382 return 0;
383
384 dtl1_hci_flush(hdev);
385
386 return 0;
387}
388
389
390static int dtl1_hci_send_frame(struct sk_buff *skb)
391{
392 dtl1_info_t *info;
393 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
394 struct sk_buff *s;
395 nsh_t nsh;
396
397 if (!hdev) {
398 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
399 return -ENODEV;
400 }
401
402 info = (dtl1_info_t *)(hdev->driver_data);
403
404 switch (bt_cb(skb)->pkt_type) {
405 case HCI_COMMAND_PKT:
406 hdev->stat.cmd_tx++;
407 nsh.type = 0x81;
408 break;
409 case HCI_ACLDATA_PKT:
410 hdev->stat.acl_tx++;
411 nsh.type = 0x82;
412 break;
413 case HCI_SCODATA_PKT:
414 hdev->stat.sco_tx++;
415 nsh.type = 0x83;
416 break;
417 default:
418 return -EILSEQ;
419 };
420
421 nsh.zero = 0;
422 nsh.len = skb->len;
423
424 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
425 if (!s)
426 return -ENOMEM;
427
428 skb_reserve(s, NSHL);
429 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
430 if (skb->len & 0x0001)
431 *skb_put(s, 1) = 0;
432
433
434 memcpy(skb_push(s, NSHL), &nsh, NSHL);
435 skb_queue_tail(&(info->txq), s);
436
437 dtl1_write_wakeup(info);
438
439 kfree_skb(skb);
440
441 return 0;
442}
443
444
445static void dtl1_hci_destruct(struct hci_dev *hdev)
446{
447}
448
449
450static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
451{
452 return -ENOIOCTLCMD;
453}
454
455
456
457
458
459
460static int dtl1_open(dtl1_info_t *info)
461{
462 unsigned long flags;
463 unsigned int iobase = info->p_dev->resource[0]->start;
464 struct hci_dev *hdev;
465
466 spin_lock_init(&(info->lock));
467
468 skb_queue_head_init(&(info->txq));
469
470 info->rx_state = RECV_WAIT_NSH;
471 info->rx_count = NSHL;
472 info->rx_skb = NULL;
473
474 set_bit(XMIT_WAITING, &(info->tx_state));
475
476
477 hdev = hci_alloc_dev();
478 if (!hdev) {
479 BT_ERR("Can't allocate HCI device");
480 return -ENOMEM;
481 }
482
483 info->hdev = hdev;
484
485 hdev->bus = HCI_PCCARD;
486 hdev->driver_data = info;
487 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
488
489 hdev->open = dtl1_hci_open;
490 hdev->close = dtl1_hci_close;
491 hdev->flush = dtl1_hci_flush;
492 hdev->send = dtl1_hci_send_frame;
493 hdev->destruct = dtl1_hci_destruct;
494 hdev->ioctl = dtl1_hci_ioctl;
495
496 hdev->owner = THIS_MODULE;
497
498 spin_lock_irqsave(&(info->lock), flags);
499
500
501 outb(0, iobase + UART_MCR);
502
503
504 outb(0, iobase + UART_IER);
505
506
507 outb(UART_LCR_WLEN8, iobase + UART_LCR);
508 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
509
510 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
511 & UART_MSR_RI;
512
513
514 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
515
516 spin_unlock_irqrestore(&(info->lock), flags);
517
518
519 msleep(2000);
520
521
522 if (hci_register_dev(hdev) < 0) {
523 BT_ERR("Can't register HCI device");
524 info->hdev = NULL;
525 hci_free_dev(hdev);
526 return -ENODEV;
527 }
528
529 return 0;
530}
531
532
533static int dtl1_close(dtl1_info_t *info)
534{
535 unsigned long flags;
536 unsigned int iobase = info->p_dev->resource[0]->start;
537 struct hci_dev *hdev = info->hdev;
538
539 if (!hdev)
540 return -ENODEV;
541
542 dtl1_hci_close(hdev);
543
544 spin_lock_irqsave(&(info->lock), flags);
545
546
547 outb(0, iobase + UART_MCR);
548
549
550 outb(0, iobase + UART_IER);
551
552 spin_unlock_irqrestore(&(info->lock), flags);
553
554 if (hci_unregister_dev(hdev) < 0)
555 BT_ERR("Can't unregister HCI device %s", hdev->name);
556
557 hci_free_dev(hdev);
558
559 return 0;
560}
561
562static int dtl1_probe(struct pcmcia_device *link)
563{
564 dtl1_info_t *info;
565
566
567 info = kzalloc(sizeof(*info), GFP_KERNEL);
568 if (!info)
569 return -ENOMEM;
570
571 info->p_dev = link;
572 link->priv = info;
573
574 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
575
576 return dtl1_config(link);
577}
578
579
580static void dtl1_detach(struct pcmcia_device *link)
581{
582 dtl1_info_t *info = link->priv;
583
584 dtl1_release(link);
585
586 kfree(info);
587}
588
589static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
590{
591 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
592 return -ENODEV;
593
594 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
595 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
596
597 return pcmcia_request_io(p_dev);
598}
599
600static int dtl1_config(struct pcmcia_device *link)
601{
602 dtl1_info_t *info = link->priv;
603 int i;
604
605
606 link->resource[0]->end = 8;
607 if (pcmcia_loop_config(link, dtl1_confcheck, NULL) < 0)
608 goto failed;
609
610 i = pcmcia_request_irq(link, dtl1_interrupt);
611 if (i != 0)
612 goto failed;
613
614 i = pcmcia_enable_device(link);
615 if (i != 0)
616 goto failed;
617
618 if (dtl1_open(info) != 0)
619 goto failed;
620
621 return 0;
622
623failed:
624 dtl1_release(link);
625 return -ENODEV;
626}
627
628
629static void dtl1_release(struct pcmcia_device *link)
630{
631 dtl1_info_t *info = link->priv;
632
633 dtl1_close(info);
634
635 pcmcia_disable_device(link);
636}
637
638
639static struct pcmcia_device_id dtl1_ids[] = {
640 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
641 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
642 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
643 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
644 PCMCIA_DEVICE_NULL
645};
646MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
647
648static struct pcmcia_driver dtl1_driver = {
649 .owner = THIS_MODULE,
650 .name = "dtl1_cs",
651 .probe = dtl1_probe,
652 .remove = dtl1_detach,
653 .id_table = dtl1_ids,
654};
655
656static int __init init_dtl1_cs(void)
657{
658 return pcmcia_register_driver(&dtl1_driver);
659}
660
661
662static void __exit exit_dtl1_cs(void)
663{
664 pcmcia_unregister_driver(&dtl1_driver);
665}
666
667module_init(init_dtl1_cs);
668module_exit(exit_dtl1_cs);
669
