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
301 BUG_ON(!info->hdev);
302
303 iobase = info->p_dev->io.BasePort1;
304
305 spin_lock(&(info->lock));
306
307 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
308 while (iir) {
309
310 /* Clear interrupt */
311 lsr = inb(iobase + UART_LSR);
312
313 switch (iir) {
314 case UART_IIR_RLSI:
315 BT_ERR("RLSI");
316 break;
317 case UART_IIR_RDI:
318 /* Receive interrupt */
319 dtl1_receive(info);
320 break;
321 case UART_IIR_THRI:
322 if (lsr & UART_LSR_THRE) {
323 /* Transmitter ready for data */
324 dtl1_write_wakeup(info);
325 }
326 break;
327 default:
328 BT_ERR("Unhandled IIR=%#x", iir);
329 break;
330 }
331
332 /* Make sure we don't stay here too long */
333 if (boguscount++ > 100)
334 break;
335
336 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
337
338 }
339
340 msr = inb(iobase + UART_MSR);
341
342 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
343 info->ri_latch = msr & UART_MSR_RI;
344 clear_bit(XMIT_WAITING, &(info->tx_state));
345 dtl1_write_wakeup(info);
346 }
347
348 spin_unlock(&(info->lock));
349
350 return IRQ_HANDLED;
351 }
352
353
354
355 /* ======================== HCI interface ======================== */
356
357
358 static int dtl1_hci_open(struct hci_dev *hdev)
359 {
360 set_bit(HCI_RUNNING, &(hdev->flags));
361
362 return 0;
363 }
364
365
366 static int dtl1_hci_flush(struct hci_dev *hdev)
367 {
368 dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
369
370 /* Drop TX queue */
371 skb_queue_purge(&(info->txq));
372
373 return 0;
374 }
375
376
377 static 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
388 static int dtl1_hci_send_frame(struct sk_buff *skb)
389 {
390 dtl1_info_t *info;
391 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
392 struct sk_buff *s;
393 nsh_t nsh;
394
395 if (!hdev) {
396 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
397 return -ENODEV;
398 }
399
400 info = (dtl1_info_t *)(hdev->driver_data);
401
402 switch (bt_cb(skb)->pkt_type) {
403 case HCI_COMMAND_PKT:
404 hdev->stat.cmd_tx++;
405 nsh.type = 0x81;
406 break;
407 case HCI_ACLDATA_PKT:
408 hdev->stat.acl_tx++;
409 nsh.type = 0x82;
410 break;
411 case HCI_SCODATA_PKT:
412 hdev->stat.sco_tx++;
413 nsh.type = 0x83;
414 break;
415 };
416
417 nsh.zero = 0;
418 nsh.len = skb->len;
419
420 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
421 if (!s)
422 return -ENOMEM;
423
424 skb_reserve(s, NSHL);
425 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
426 if (skb->len & 0x0001)
427 *skb_put(s, 1) = 0; /* PAD */
428
429 /* Prepend skb with Nokia frame header and queue */
430 memcpy(skb_push(s, NSHL), &nsh, NSHL);
431 skb_queue_tail(&(info->txq), s);
432
433 dtl1_write_wakeup(info);
434
435 kfree_skb(skb);
436
437 return 0;
438 }
439
440
441 static void dtl1_hci_destruct(struct hci_dev *hdev)
442 {
443 }
444
445
446 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
447 {
448 return -ENOIOCTLCMD;
449 }
450
451
452
453 /* ======================== Card services HCI interaction ======================== */
454
455
456 static int dtl1_open(dtl1_info_t *info)
457 {
458 unsigned long flags;
459 unsigned int iobase = info->p_dev->io.BasePort1;
460 struct hci_dev *hdev;
461
462 spin_lock_init(&(info->lock));
463
464 skb_queue_head_init(&(info->txq));
465
466 info->rx_state = RECV_WAIT_NSH;
467 info->rx_count = NSHL;
468 info->rx_skb = NULL;
469
470 set_bit(XMIT_WAITING, &(info->tx_state));
471
472 /* Initialize HCI device */
473 hdev = hci_alloc_dev();
474 if (!hdev) {
475 BT_ERR("Can't allocate HCI device");
476 return -ENOMEM;
477 }
478
479 info->hdev = hdev;
480
481 hdev->type = HCI_PCCARD;
482 hdev->driver_data = info;
483 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
484
485 hdev->open = dtl1_hci_open;
486 hdev->close = dtl1_hci_close;
487 hdev->flush = dtl1_hci_flush;
488 hdev->send = dtl1_hci_send_frame;
489 hdev->destruct = dtl1_hci_destruct;
490 hdev->ioctl = dtl1_hci_ioctl;
491
492 hdev->owner = THIS_MODULE;
493
494 spin_lock_irqsave(&(info->lock), flags);
495
496 /* Reset UART */
497 outb(0, iobase + UART_MCR);
498
499 /* Turn off interrupts */
500 outb(0, iobase + UART_IER);
501
502 /* Initialize UART */
503 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
504 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
505
506 info->ri_latch = inb(info->p_dev->io.BasePort1 + UART_MSR) & UART_MSR_RI;
507
508 /* Turn on interrupts */
509 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
510
511 spin_unlock_irqrestore(&(info->lock), flags);
512
513 /* Timeout before it is safe to send the first HCI packet */
514 msleep(2000);
515
516 /* Register HCI device */
517 if (hci_register_dev(hdev) < 0) {
518 BT_ERR("Can't register HCI device");
519 info->hdev = NULL;
520 hci_free_dev(hdev);
521 return -ENODEV;
522 }
523
524 return 0;
525 }
526
527
528 static int dtl1_close(dtl1_info_t *info)
529 {
530 unsigned long flags;
531 unsigned int iobase = info->p_dev->io.BasePort1;
532 struct hci_dev *hdev = info->hdev;
533
534 if (!hdev)
535 return -ENODEV;
536
537 dtl1_hci_close(hdev);
538
539 spin_lock_irqsave(&(info->lock), flags);
540
541 /* Reset UART */
542 outb(0, iobase + UART_MCR);
543
544 /* Turn off interrupts */
545 outb(0, iobase + UART_IER);
546
547 spin_unlock_irqrestore(&(info->lock), flags);
548
549 if (hci_unregister_dev(hdev) < 0)
550 BT_ERR("Can't unregister HCI device %s", hdev->name);
551
552 hci_free_dev(hdev);
553
554 return 0;
555 }
556
557 static int dtl1_probe(struct pcmcia_device *link)
558 {
559 dtl1_info_t *info;
560
561 /* Create new info device */
562 info = kzalloc(sizeof(*info), GFP_KERNEL);
563 if (!info)
564 return -ENOMEM;
565
566 info->p_dev = link;
567 link->priv = info;
568
569 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
570 link->io.NumPorts1 = 8;
571 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
572 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
573
574 link->irq.Handler = dtl1_interrupt;
575 link->irq.Instance = info;
576
577 link->conf.Attributes = CONF_ENABLE_IRQ;
578 link->conf.IntType = INT_MEMORY_AND_IO;
579
580 return dtl1_config(link);
581 }
582
583
584 static void dtl1_detach(struct pcmcia_device *link)
585 {
586 dtl1_info_t *info = link->priv;
587
588 dtl1_release(link);
589
590 kfree(info);
591 }
592
593 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
594 {
595 int i;
596
597 i = pcmcia_get_tuple_data(handle, tuple);
598 if (i != CS_SUCCESS)
599 return i;
600
601 return pcmcia_parse_tuple(handle, tuple, parse);
602 }
603
604 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
605 {
606 if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
607 return CS_NO_MORE_ITEMS;
608 return get_tuple(handle, tuple, parse);
609 }
610
611 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
612 {
613 if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
614 return CS_NO_MORE_ITEMS;
615 return get_tuple(handle, tuple, parse);
616 }
617
618 static int dtl1_config(struct pcmcia_device *link)
619 {
620 dtl1_info_t *info = link->priv;
621 tuple_t tuple;
622 u_short buf[256];
623 cisparse_t parse;
624 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
625 int i;
626
627 tuple.TupleData = (cisdata_t *)buf;
628 tuple.TupleOffset = 0;
629 tuple.TupleDataMax = 255;
630 tuple.Attributes = 0;
631 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
632
633 /* Look for a generic full-sized window */
634 link->io.NumPorts1 = 8;
635 i = first_tuple(link, &tuple, &parse);
636 while (i != CS_NO_MORE_ITEMS) {
637 if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
638 link->conf.ConfigIndex = cf->index;
639 link->io.BasePort1 = cf->io.win[0].base;
640 link->io.NumPorts1 = cf->io.win[0].len; /*yo */
641 link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
642 i = pcmcia_request_io(link, &link->io);
643 if (i == CS_SUCCESS)
644 break;
645 }
646 i = next_tuple(link, &tuple, &parse);
647 }
648
649 if (i != CS_SUCCESS) {
650 cs_error(link, RequestIO, i);
651 goto failed;
652 }
653
654 i = pcmcia_request_irq(link, &link->irq);
655 if (i != CS_SUCCESS) {
656 cs_error(link, RequestIRQ, i);
657 link->irq.AssignedIRQ = 0;
658 }
659
660 i = pcmcia_request_configuration(link, &link->conf);
661 if (i != CS_SUCCESS) {
662 cs_error(link, RequestConfiguration, i);
663 goto failed;
664 }
665
666 if (dtl1_open(info) != 0)
667 goto failed;
668
669 strcpy(info->node.dev_name, info->hdev->name);
670 link->dev_node = &info->node;
671
672 return 0;
673
674 failed:
675 dtl1_release(link);
676 return -ENODEV;
677 }
678
679
680 static void dtl1_release(struct pcmcia_device *link)
681 {
682 dtl1_info_t *info = link->priv;
683
684 dtl1_close(info);
685
686 pcmcia_disable_device(link);
687 }
688
689
690 static struct pcmcia_device_id dtl1_ids[] = {
691 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
692 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
693 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
694 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
695 PCMCIA_DEVICE_NULL
696 };
697 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
698
699 static struct pcmcia_driver dtl1_driver = {
700 .owner = THIS_MODULE,
701 .drv = {
702 .name = "dtl1_cs",
703 },
704 .probe = dtl1_probe,
705 .remove = dtl1_detach,
706 .id_table = dtl1_ids,
707 };
708
709 static int __init init_dtl1_cs(void)
710 {
711 return pcmcia_register_driver(&dtl1_driver);
712 }
713
714
715 static void __exit exit_dtl1_cs(void)
716 {
717 pcmcia_unregister_driver(&dtl1_driver);
718 }
719
720 module_init(init_dtl1_cs);
721 module_exit(exit_dtl1_cs);
722
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