1 /*
2 *
3 * A driver for Nokia Connectivity Card DTL-1 devices
4 *
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation;
11 *
12 * Software distributed under the License is distributed on an "AS
13 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14 * implied. See the License for the specific language governing
15 * rights and limitations under the License.
16 *
17 * The initial developer of the original code is David A. Hinds
18 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
19 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
20 *
21 */
22
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/cs_types.h>
45 #include <pcmcia/cs.h>
46 #include <pcmcia/cistpl.h>
47 #include <pcmcia/ciscode.h>
48 #include <pcmcia/ds.h>
49 #include <pcmcia/cisreg.h>
50
51 #include <net/bluetooth/bluetooth.h>
52 #include <net/bluetooth/hci_core.h>
53
54
55
56 /* ======================== Module parameters ======================== */
57
58
59 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
60 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
61 MODULE_LICENSE("GPL");
62
63
64
65 /* ======================== Local structures ======================== */
66
67
68 typedef struct dtl1_info_t {
69 struct pcmcia_device *p_dev;
70 dev_node_t node;
71
72 struct hci_dev *hdev;
73
74 spinlock_t lock; /* For serializing operations */
75
76 unsigned long flowmask; /* HCI flow mask */
77 int ri_latch;
78
79 struct sk_buff_head txq;
80 unsigned long tx_state;
81
82 unsigned long rx_state;
83 unsigned long rx_count;
84 struct sk_buff *rx_skb;
85 } dtl1_info_t;
86
87
88 static int dtl1_config(struct pcmcia_device *link);
89 static void dtl1_release(struct pcmcia_device *link);
90
91 static void dtl1_detach(struct pcmcia_device *p_dev);
92
93
94 /* Transmit states */
95 #define XMIT_SENDING 1
96 #define XMIT_WAKEUP 2
97 #define XMIT_WAITING 8
98
99 /* Receiver States */
100 #define RECV_WAIT_NSH 0
101 #define RECV_WAIT_DATA 1
102
103
104 typedef struct {
105 u8 type;
106 u8 zero;
107 u16 len;
108 } __attribute__ ((packed)) nsh_t; /* Nokia Specific Header */
109
110 #define NSHL 4 /* Nokia Specific Header Length */
111
112
113
114 /* ======================== Interrupt handling ======================== */
115
116
117 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
118 {
119 int actual = 0;
120
121 /* Tx FIFO should be empty */
122 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
123 return 0;
124
125 /* Fill FIFO with current frame */
126 while ((fifo_size-- > 0) && (actual < len)) {
127 /* Transmit next byte */
128 outb(buf[actual], iobase + UART_TX);
129 actual++;
130 }
131
132 return actual;
133 }
134
135
136 static void dtl1_write_wakeup(dtl1_info_t *info)
137 {
138 if (!info) {
139 BT_ERR("Unknown device");
140 return;
141 }
142
143 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
144 set_bit(XMIT_WAKEUP, &(info->tx_state));
145 return;
146 }
147
148 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
149 set_bit(XMIT_WAKEUP, &(info->tx_state));
150 return;
151 }
152
153 do {
154 register unsigned int iobase = info->p_dev->io.BasePort1;
155 register struct sk_buff *skb;
156 register int len;
157
158 clear_bit(XMIT_WAKEUP, &(info->tx_state));
159
160 if (!pcmcia_dev_present(info->p_dev))
161 return;
162
163 if (!(skb = skb_dequeue(&(info->txq))))
164 break;
165
166 /* Send frame */
167 len = dtl1_write(iobase, 32, skb->data, skb->len);
168
169 if (len == skb->len) {
170 set_bit(XMIT_WAITING, &(info->tx_state));
171 kfree_skb(skb);
172 } else {
173 skb_pull(skb, len);
174 skb_queue_head(&(info->txq), skb);
175 }
176
177 info->hdev->stat.byte_tx += len;
178
179 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
180
181 clear_bit(XMIT_SENDING, &(info->tx_state));
182 }
183
184
185 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
186 {
187 u8 flowmask = *(u8 *)skb->data;
188 int i;
189
190 printk(KERN_INFO "Bluetooth: Nokia control data =");
191 for (i = 0; i < skb->len; i++) {
192 printk(" %02x", skb->data[i]);
193 }
194 printk("\n");
195
196 /* transition to active state */
197 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
198 clear_bit(XMIT_WAITING, &(info->tx_state));
199 dtl1_write_wakeup(info);
200 }
201
202 info->flowmask = flowmask;
203
204 kfree_skb(skb);
205 }
206
207
208 static void dtl1_receive(dtl1_info_t *info)
209 {
210 unsigned int iobase;
211 nsh_t *nsh;
212 int boguscount = 0;
213
214 if (!info) {
215 BT_ERR("Unknown device");
216 return;
217 }
218
219 iobase = info->p_dev->io.BasePort1;
220
221 do {
222 info->hdev->stat.byte_rx++;
223
224 /* Allocate packet */
225 if (info->rx_skb == NULL)
226 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
227 BT_ERR("Can't allocate mem for new packet");
228 info->rx_state = RECV_WAIT_NSH;
229 info->rx_count = NSHL;
230 return;
231 }
232
233 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
234 nsh = (nsh_t *)info->rx_skb->data;
235
236 info->rx_count--;
237
238 if (info->rx_count == 0) {
239
240 switch (info->rx_state) {
241 case RECV_WAIT_NSH:
242 info->rx_state = RECV_WAIT_DATA;
243 info->rx_count = nsh->len + (nsh->len & 0x0001);
244 break;
245 case RECV_WAIT_DATA:
246 bt_cb(info->rx_skb)->pkt_type = nsh->type;
247
248 /* remove PAD byte if it exists */
249 if (nsh->len & 0x0001) {
250 info->rx_skb->tail--;
251 info->rx_skb->len--;
252 }
253
254 /* remove NSH */
255 skb_pull(info->rx_skb, NSHL);
256
257 switch (bt_cb(info->rx_skb)->pkt_type) {
258 case 0x80:
259 /* control data for the Nokia Card */
260 dtl1_control(info, info->rx_skb);
261 break;
262 case 0x82:
263 case 0x83:
264 case 0x84:
265 /* send frame to the HCI layer */
266 info->rx_skb->dev = (void *) info->hdev;
267 bt_cb(info->rx_skb)->pkt_type &= 0x0f;
268 hci_recv_frame(info->rx_skb);
269 break;
270 default:
271 /* unknown packet */
272 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
273 kfree_skb(info->rx_skb);
274 break;
275 }
276
277 info->rx_state = RECV_WAIT_NSH;
278 info->rx_count = NSHL;
279 info->rx_skb = NULL;
280 break;
281 }
282
283 }
284
285 /* Make sure we don't stay here too long */
286 if (boguscount++ > 32)
287 break;
288
289 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
290 }
291
292
293 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
294 {
295 dtl1_info_t *info = dev_inst;
296 unsigned int iobase;
297 unsigned char msr;
298 int boguscount = 0;
299 int iir, lsr;
300 irqreturn_t r = IRQ_NONE;
301
302 BUG_ON(!info->hdev);
303
304 iobase = info->p_dev->io.BasePort1;
305
306 spin_lock(&(info->lock));
307
308 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
309 while (iir) {
310
311 r = IRQ_HANDLED;
312 /* Clear interrupt */
313 lsr = inb(iobase + UART_LSR);
314
315 switch (iir) {
316 case UART_IIR_RLSI:
317 BT_ERR("RLSI");
318 break;
319 case UART_IIR_RDI:
320 /* Receive interrupt */
321 dtl1_receive(info);
322 break;
323 case UART_IIR_THRI:
324 if (lsr & UART_LSR_THRE) {
325 /* Transmitter ready for data */
326 dtl1_write_wakeup(info);
327 }
328 break;
329 default:
330 BT_ERR("Unhandled IIR=%#x", iir);
331 break;
332 }
333
334 /* Make sure we don't stay here too long */
335 if (boguscount++ > 100)
336 break;
337
338 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
339
340 }
341
342 msr = inb(iobase + UART_MSR);
343
344 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
345 info->ri_latch = msr & UART_MSR_RI;
346 clear_bit(XMIT_WAITING, &(info->tx_state));
347 dtl1_write_wakeup(info);
348 r = IRQ_HANDLED;
349 }
350
351 spin_unlock(&(info->lock));
352
353 return r;
354 }
355
356
357
358 /* ======================== HCI interface ======================== */
359
360
361 static int dtl1_hci_open(struct hci_dev *hdev)
362 {
363 set_bit(HCI_RUNNING, &(hdev->flags));
364
365 return 0;
366 }
367
368
369 static int dtl1_hci_flush(struct hci_dev *hdev)
370 {
371 dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
372
373 /* Drop TX queue */
374 skb_queue_purge(&(info->txq));
375
376 return 0;
377 }
378
379
380 static int dtl1_hci_close(struct hci_dev *hdev)
381 {
382 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
383 return 0;
384
385 dtl1_hci_flush(hdev);
386
387 return 0;
388 }
389
390
391 static int dtl1_hci_send_frame(struct sk_buff *skb)
392 {
393 dtl1_info_t *info;
394 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
395 struct sk_buff *s;
396 nsh_t nsh;
397
398 if (!hdev) {
399 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
400 return -ENODEV;
401 }
402
403 info = (dtl1_info_t *)(hdev->driver_data);
404
405 switch (bt_cb(skb)->pkt_type) {
406 case HCI_COMMAND_PKT:
407 hdev->stat.cmd_tx++;
408 nsh.type = 0x81;
409 break;
410 case HCI_ACLDATA_PKT:
411 hdev->stat.acl_tx++;
412 nsh.type = 0x82;
413 break;
414 case HCI_SCODATA_PKT:
415 hdev->stat.sco_tx++;
416 nsh.type = 0x83;
417 break;
418 default:
419 return -EILSEQ;
420 };
421
422 nsh.zero = 0;
423 nsh.len = skb->len;
424
425 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
426 if (!s)
427 return -ENOMEM;
428
429 skb_reserve(s, NSHL);
430 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
431 if (skb->len & 0x0001)
432 *skb_put(s, 1) = 0; /* PAD */
433
434 /* Prepend skb with Nokia frame header and queue */
435 memcpy(skb_push(s, NSHL), &nsh, NSHL);
436 skb_queue_tail(&(info->txq), s);
437
438 dtl1_write_wakeup(info);
439
440 kfree_skb(skb);
441
442 return 0;
443 }
444
445
446 static void dtl1_hci_destruct(struct hci_dev *hdev)
447 {
448 }
449
450
451 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
452 {
453 return -ENOIOCTLCMD;
454 }
455
456
457
458 /* ======================== Card services HCI interaction ======================== */
459
460
461 static int dtl1_open(dtl1_info_t *info)
462 {
463 unsigned long flags;
464 unsigned int iobase = info->p_dev->io.BasePort1;
465 struct hci_dev *hdev;
466
467 spin_lock_init(&(info->lock));
468
469 skb_queue_head_init(&(info->txq));
470
471 info->rx_state = RECV_WAIT_NSH;
472 info->rx_count = NSHL;
473 info->rx_skb = NULL;
474
475 set_bit(XMIT_WAITING, &(info->tx_state));
476
477 /* Initialize HCI device */
478 hdev = hci_alloc_dev();
479 if (!hdev) {
480 BT_ERR("Can't allocate HCI device");
481 return -ENOMEM;
482 }
483
484 info->hdev = hdev;
485
486 hdev->type = HCI_PCCARD;
487 hdev->driver_data = info;
488 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
489
490 hdev->open = dtl1_hci_open;
491 hdev->close = dtl1_hci_close;
492 hdev->flush = dtl1_hci_flush;
493 hdev->send = dtl1_hci_send_frame;
494 hdev->destruct = dtl1_hci_destruct;
495 hdev->ioctl = dtl1_hci_ioctl;
496
497 hdev->owner = THIS_MODULE;
498
499 spin_lock_irqsave(&(info->lock), flags);
500
501 /* Reset UART */
502 outb(0, iobase + UART_MCR);
503
504 /* Turn off interrupts */
505 outb(0, iobase + UART_IER);
506
507 /* Initialize UART */
508 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
509 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
510
511 info->ri_latch = inb(info->p_dev->io.BasePort1 + UART_MSR) & UART_MSR_RI;
512
513 /* Turn on interrupts */
514 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
515
516 spin_unlock_irqrestore(&(info->lock), flags);
517
518 /* Timeout before it is safe to send the first HCI packet */
519 msleep(2000);
520
521 /* Register HCI device */
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
533 static int dtl1_close(dtl1_info_t *info)
534 {
535 unsigned long flags;
536 unsigned int iobase = info->p_dev->io.BasePort1;
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 /* Reset UART */
547 outb(0, iobase + UART_MCR);
548
549 /* Turn off interrupts */
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
562 static int dtl1_probe(struct pcmcia_device *link)
563 {
564 dtl1_info_t *info;
565
566 /* Create new info device */
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->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
575 link->io.NumPorts1 = 8;
576 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT;
577 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
578
579 link->irq.Handler = dtl1_interrupt;
580 link->irq.Instance = info;
581
582 link->conf.Attributes = CONF_ENABLE_IRQ;
583 link->conf.IntType = INT_MEMORY_AND_IO;
584
585 return dtl1_config(link);
586 }
587
588
589 static void dtl1_detach(struct pcmcia_device *link)
590 {
591 dtl1_info_t *info = link->priv;
592
593 dtl1_release(link);
594
595 kfree(info);
596 }
597
598 static int dtl1_confcheck(struct pcmcia_device *p_dev,
599 cistpl_cftable_entry_t *cf,
600 cistpl_cftable_entry_t *dflt,
601 unsigned int vcc,
602 void *priv_data)
603 {
604 if ((cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
605 p_dev->io.BasePort1 = cf->io.win[0].base;
606 p_dev->io.NumPorts1 = cf->io.win[0].len; /*yo */
607 p_dev->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
608 if (!pcmcia_request_io(p_dev, &p_dev->io))
609 return 0;
610 }
611 return -ENODEV;
612 }
613
614 static int dtl1_config(struct pcmcia_device *link)
615 {
616 dtl1_info_t *info = link->priv;
617 int i;
618
619 /* Look for a generic full-sized window */
620 link->io.NumPorts1 = 8;
621 if (!pcmcia_loop_config(link, dtl1_confcheck, NULL))
622 goto failed;
623
624 i = pcmcia_request_irq(link, &link->irq);
625 if (i != 0) {
626 cs_error(link, RequestIRQ, i);
627 link->irq.AssignedIRQ = 0;
628 }
629
630 i = pcmcia_request_configuration(link, &link->conf);
631 if (i != 0) {
632 cs_error(link, RequestConfiguration, i);
633 goto failed;
634 }
635
636 if (dtl1_open(info) != 0)
637 goto failed;
638
639 strcpy(info->node.dev_name, info->hdev->name);
640 link->dev_node = &info->node;
641
642 return 0;
643
644 failed:
645 dtl1_release(link);
646 return -ENODEV;
647 }
648
649
650 static void dtl1_release(struct pcmcia_device *link)
651 {
652 dtl1_info_t *info = link->priv;
653
654 dtl1_close(info);
655
656 pcmcia_disable_device(link);
657 }
658
659
660 static struct pcmcia_device_id dtl1_ids[] = {
661 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
662 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
663 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
664 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
665 PCMCIA_DEVICE_NULL
666 };
667 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
668
669 static struct pcmcia_driver dtl1_driver = {
670 .owner = THIS_MODULE,
671 .drv = {
672 .name = "dtl1_cs",
673 },
674 .probe = dtl1_probe,
675 .remove = dtl1_detach,
676 .id_table = dtl1_ids,
677 };
678
679 static int __init init_dtl1_cs(void)
680 {
681 return pcmcia_register_driver(&dtl1_driver);
682 }
683
684
685 static void __exit exit_dtl1_cs(void)
686 {
687 pcmcia_unregister_driver(&dtl1_driver);
688 }
689
690 module_init(init_dtl1_cs);
691 module_exit(exit_dtl1_cs);
692
|
This page was automatically generated by the
LXR engine.
|