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1/*
2 *
3 * Driver for the 3Com Bluetooth PCMCIA card
4 *
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
6 * Jose Orlando Pereira <jop@di.uminho.pt>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation;
12 *
13 * Software distributed under the License is distributed on an "AS
14 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
15 * implied. See the License for the specific language governing
16 * rights and limitations under the License.
17 *
18 * The initial developer of the original code is David A. Hinds
19 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
20 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
21 *
22 */
23
24#include <linux/module.h>
25
26#include <linux/kernel.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/types.h>
30#include <linux/delay.h>
31#include <linux/errno.h>
32#include <linux/ptrace.h>
33#include <linux/ioport.h>
34#include <linux/spinlock.h>
35#include <linux/moduleparam.h>
36
37#include <linux/skbuff.h>
38#include <linux/string.h>
39#include <linux/serial.h>
40#include <linux/serial_reg.h>
41#include <linux/bitops.h>
42#include <asm/system.h>
43#include <asm/io.h>
44
45#include <linux/device.h>
46#include <linux/firmware.h>
47
48#include <pcmcia/cistpl.h>
49#include <pcmcia/ciscode.h>
50#include <pcmcia/ds.h>
51#include <pcmcia/cisreg.h>
52
53#include <net/bluetooth/bluetooth.h>
54#include <net/bluetooth/hci_core.h>
55
56
57
58/* ======================== Module parameters ======================== */
59
60
61MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
62MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
63MODULE_LICENSE("GPL");
64MODULE_FIRMWARE("BT3CPCC.bin");
65
66
67
68/* ======================== Local structures ======================== */
69
70
71typedef struct bt3c_info_t {
72 struct pcmcia_device *p_dev;
73
74 struct hci_dev *hdev;
75
76 spinlock_t lock; /* For serializing operations */
77
78 struct sk_buff_head txq;
79 unsigned long tx_state;
80
81 unsigned long rx_state;
82 unsigned long rx_count;
83 struct sk_buff *rx_skb;
84} bt3c_info_t;
85
86
87static int bt3c_config(struct pcmcia_device *link);
88static void bt3c_release(struct pcmcia_device *link);
89
90static void bt3c_detach(struct pcmcia_device *p_dev);
91
92
93/* Transmit states */
94#define XMIT_SENDING 1
95#define XMIT_WAKEUP 2
96#define XMIT_WAITING 8
97
98/* Receiver states */
99#define RECV_WAIT_PACKET_TYPE 0
100#define RECV_WAIT_EVENT_HEADER 1
101#define RECV_WAIT_ACL_HEADER 2
102#define RECV_WAIT_SCO_HEADER 3
103#define RECV_WAIT_DATA 4
104
105
106
107/* ======================== Special I/O functions ======================== */
108
109
110#define DATA_L 0
111#define DATA_H 1
112#define ADDR_L 2
113#define ADDR_H 3
114#define CONTROL 4
115
116
117static inline void bt3c_address(unsigned int iobase, unsigned short addr)
118{
119 outb(addr & 0xff, iobase + ADDR_L);
120 outb((addr >> 8) & 0xff, iobase + ADDR_H);
121}
122
123
124static inline void bt3c_put(unsigned int iobase, unsigned short value)
125{
126 outb(value & 0xff, iobase + DATA_L);
127 outb((value >> 8) & 0xff, iobase + DATA_H);
128}
129
130
131static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
132{
133 bt3c_address(iobase, addr);
134 bt3c_put(iobase, value);
135}
136
137
138static inline unsigned short bt3c_get(unsigned int iobase)
139{
140 unsigned short value = inb(iobase + DATA_L);
141
142 value |= inb(iobase + DATA_H) << 8;
143
144 return value;
145}
146
147
148static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
149{
150 bt3c_address(iobase, addr);
151
152 return bt3c_get(iobase);
153}
154
155
156
157/* ======================== Interrupt handling ======================== */
158
159
160static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
161{
162 int actual = 0;
163
164 bt3c_address(iobase, 0x7080);
165
166 /* Fill FIFO with current frame */
167 while (actual < len) {
168 /* Transmit next byte */
169 bt3c_put(iobase, buf[actual]);
170 actual++;
171 }
172
173 bt3c_io_write(iobase, 0x7005, actual);
174
175 return actual;
176}
177
178
179static void bt3c_write_wakeup(bt3c_info_t *info)
180{
181 if (!info) {
182 BT_ERR("Unknown device");
183 return;
184 }
185
186 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
187 return;
188
189 do {
190 register unsigned int iobase = info->p_dev->resource[0]->start;
191 register struct sk_buff *skb;
192 register int len;
193
194 if (!pcmcia_dev_present(info->p_dev))
195 break;
196
197
198 if (!(skb = skb_dequeue(&(info->txq)))) {
199 clear_bit(XMIT_SENDING, &(info->tx_state));
200 break;
201 }
202
203 /* Send frame */
204 len = bt3c_write(iobase, 256, skb->data, skb->len);
205
206 if (len != skb->len) {
207 BT_ERR("Very strange");
208 }
209
210 kfree_skb(skb);
211
212 info->hdev->stat.byte_tx += len;
213
214 } while (0);
215}
216
217
218static void bt3c_receive(bt3c_info_t *info)
219{
220 unsigned int iobase;
221 int size = 0, avail;
222
223 if (!info) {
224 BT_ERR("Unknown device");
225 return;
226 }
227
228 iobase = info->p_dev->resource[0]->start;
229
230 avail = bt3c_read(iobase, 0x7006);
231 //printk("bt3c_cs: receiving %d bytes\n", avail);
232
233 bt3c_address(iobase, 0x7480);
234 while (size < avail) {
235 size++;
236 info->hdev->stat.byte_rx++;
237
238 /* Allocate packet */
239 if (info->rx_skb == NULL) {
240 info->rx_state = RECV_WAIT_PACKET_TYPE;
241 info->rx_count = 0;
242 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
243 BT_ERR("Can't allocate mem for new packet");
244 return;
245 }
246 }
247
248
249 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
250
251 info->rx_skb->dev = (void *) info->hdev;
252 bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
253 inb(iobase + DATA_H);
254 //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
255
256 switch (bt_cb(info->rx_skb)->pkt_type) {
257
258 case HCI_EVENT_PKT:
259 info->rx_state = RECV_WAIT_EVENT_HEADER;
260 info->rx_count = HCI_EVENT_HDR_SIZE;
261 break;
262
263 case HCI_ACLDATA_PKT:
264 info->rx_state = RECV_WAIT_ACL_HEADER;
265 info->rx_count = HCI_ACL_HDR_SIZE;
266 break;
267
268 case HCI_SCODATA_PKT:
269 info->rx_state = RECV_WAIT_SCO_HEADER;
270 info->rx_count = HCI_SCO_HDR_SIZE;
271 break;
272
273 default:
274 /* Unknown packet */
275 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
276 info->hdev->stat.err_rx++;
277 clear_bit(HCI_RUNNING, &(info->hdev->flags));
278
279 kfree_skb(info->rx_skb);
280 info->rx_skb = NULL;
281 break;
282
283 }
284
285 } else {
286
287 __u8 x = inb(iobase + DATA_L);
288
289 *skb_put(info->rx_skb, 1) = x;
290 inb(iobase + DATA_H);
291 info->rx_count--;
292
293 if (info->rx_count == 0) {
294
295 int dlen;
296 struct hci_event_hdr *eh;
297 struct hci_acl_hdr *ah;
298 struct hci_sco_hdr *sh;
299
300 switch (info->rx_state) {
301
302 case RECV_WAIT_EVENT_HEADER:
303 eh = hci_event_hdr(info->rx_skb);
304 info->rx_state = RECV_WAIT_DATA;
305 info->rx_count = eh->plen;
306 break;
307
308 case RECV_WAIT_ACL_HEADER:
309 ah = hci_acl_hdr(info->rx_skb);
310 dlen = __le16_to_cpu(ah->dlen);
311 info->rx_state = RECV_WAIT_DATA;
312 info->rx_count = dlen;
313 break;
314
315 case RECV_WAIT_SCO_HEADER:
316 sh = hci_sco_hdr(info->rx_skb);
317 info->rx_state = RECV_WAIT_DATA;
318 info->rx_count = sh->dlen;
319 break;
320
321 case RECV_WAIT_DATA:
322 hci_recv_frame(info->rx_skb);
323 info->rx_skb = NULL;
324 break;
325
326 }
327
328 }
329
330 }
331
332 }
333
334 bt3c_io_write(iobase, 0x7006, 0x0000);
335}
336
337
338static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
339{
340 bt3c_info_t *info = dev_inst;
341 unsigned int iobase;
342 int iir;
343 irqreturn_t r = IRQ_NONE;
344
345 if (!info || !info->hdev)
346 /* our irq handler is shared */
347 return IRQ_NONE;
348
349 iobase = info->p_dev->resource[0]->start;
350
351 spin_lock(&(info->lock));
352
353 iir = inb(iobase + CONTROL);
354 if (iir & 0x80) {
355 int stat = bt3c_read(iobase, 0x7001);
356
357 if ((stat & 0xff) == 0x7f) {
358 BT_ERR("Very strange (stat=0x%04x)", stat);
359 } else if ((stat & 0xff) != 0xff) {
360 if (stat & 0x0020) {
361 int status = bt3c_read(iobase, 0x7002) & 0x10;
362 BT_INFO("%s: Antenna %s", info->hdev->name,
363 status ? "out" : "in");
364 }
365 if (stat & 0x0001)
366 bt3c_receive(info);
367 if (stat & 0x0002) {
368 //BT_ERR("Ack (stat=0x%04x)", stat);
369 clear_bit(XMIT_SENDING, &(info->tx_state));
370 bt3c_write_wakeup(info);
371 }
372
373 bt3c_io_write(iobase, 0x7001, 0x0000);
374
375 outb(iir, iobase + CONTROL);
376 }
377 r = IRQ_HANDLED;
378 }
379
380 spin_unlock(&(info->lock));
381
382 return r;
383}
384
385
386
387/* ======================== HCI interface ======================== */
388
389
390static int bt3c_hci_flush(struct hci_dev *hdev)
391{
392 bt3c_info_t *info = (bt3c_info_t *)(hdev->driver_data);
393
394 /* Drop TX queue */
395 skb_queue_purge(&(info->txq));
396
397 return 0;
398}
399
400
401static int bt3c_hci_open(struct hci_dev *hdev)
402{
403 set_bit(HCI_RUNNING, &(hdev->flags));
404
405 return 0;
406}
407
408
409static int bt3c_hci_close(struct hci_dev *hdev)
410{
411 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
412 return 0;
413
414 bt3c_hci_flush(hdev);
415
416 return 0;
417}
418
419
420static int bt3c_hci_send_frame(struct sk_buff *skb)
421{
422 bt3c_info_t *info;
423 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
424 unsigned long flags;
425
426 if (!hdev) {
427 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
428 return -ENODEV;
429 }
430
431 info = (bt3c_info_t *) (hdev->driver_data);
432
433 switch (bt_cb(skb)->pkt_type) {
434 case HCI_COMMAND_PKT:
435 hdev->stat.cmd_tx++;
436 break;
437 case HCI_ACLDATA_PKT:
438 hdev->stat.acl_tx++;
439 break;
440 case HCI_SCODATA_PKT:
441 hdev->stat.sco_tx++;
442 break;
443 };
444
445 /* Prepend skb with frame type */
446 memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
447 skb_queue_tail(&(info->txq), skb);
448
449 spin_lock_irqsave(&(info->lock), flags);
450
451 bt3c_write_wakeup(info);
452
453 spin_unlock_irqrestore(&(info->lock), flags);
454
455 return 0;
456}
457
458
459static void bt3c_hci_destruct(struct hci_dev *hdev)
460{
461}
462
463
464static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
465{
466 return -ENOIOCTLCMD;
467}
468
469
470
471/* ======================== Card services HCI interaction ======================== */
472
473
474static int bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware,
475 int count)
476{
477 char *ptr = (char *) firmware;
478 char b[9];
479 unsigned int iobase, size, addr, fcs, tmp;
480 int i, err = 0;
481
482 iobase = info->p_dev->resource[0]->start;
483
484 /* Reset */
485 bt3c_io_write(iobase, 0x8040, 0x0404);
486 bt3c_io_write(iobase, 0x8040, 0x0400);
487
488 udelay(1);
489
490 bt3c_io_write(iobase, 0x8040, 0x0404);
491
492 udelay(17);
493
494 /* Load */
495 while (count) {
496 if (ptr[0] != 'S') {
497 BT_ERR("Bad address in firmware");
498 err = -EFAULT;
499 goto error;
500 }
501
502 memset(b, 0, sizeof(b));
503 memcpy(b, ptr + 2, 2);
504 size = simple_strtoul(b, NULL, 16);
505
506 memset(b, 0, sizeof(b));
507 memcpy(b, ptr + 4, 8);
508 addr = simple_strtoul(b, NULL, 16);
509
510 memset(b, 0, sizeof(b));
511 memcpy(b, ptr + (size * 2) + 2, 2);
512 fcs = simple_strtoul(b, NULL, 16);
513
514 memset(b, 0, sizeof(b));
515 for (tmp = 0, i = 0; i < size; i++) {
516 memcpy(b, ptr + (i * 2) + 2, 2);
517 tmp += simple_strtol(b, NULL, 16);
518 }
519
520 if (((tmp + fcs) & 0xff) != 0xff) {
521 BT_ERR("Checksum error in firmware");
522 err = -EILSEQ;
523 goto error;
524 }
525
526 if (ptr[1] == '3') {
527 bt3c_address(iobase, addr);
528
529 memset(b, 0, sizeof(b));
530 for (i = 0; i < (size - 4) / 2; i++) {
531 memcpy(b, ptr + (i * 4) + 12, 4);
532 tmp = simple_strtoul(b, NULL, 16);
533 bt3c_put(iobase, tmp);
534 }
535 }
536
537 ptr += (size * 2) + 6;
538 count -= (size * 2) + 6;
539 }
540
541 udelay(17);
542
543 /* Boot */
544 bt3c_address(iobase, 0x3000);
545 outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
546
547error:
548 udelay(17);
549
550 /* Clear */
551 bt3c_io_write(iobase, 0x7006, 0x0000);
552 bt3c_io_write(iobase, 0x7005, 0x0000);
553 bt3c_io_write(iobase, 0x7001, 0x0000);
554
555 return err;
556}
557
558
559static int bt3c_open(bt3c_info_t *info)
560{
561 const struct firmware *firmware;
562 struct hci_dev *hdev;
563 int err;
564
565 spin_lock_init(&(info->lock));
566
567 skb_queue_head_init(&(info->txq));
568
569 info->rx_state = RECV_WAIT_PACKET_TYPE;
570 info->rx_count = 0;
571 info->rx_skb = NULL;
572
573 /* Initialize HCI device */
574 hdev = hci_alloc_dev();
575 if (!hdev) {
576 BT_ERR("Can't allocate HCI device");
577 return -ENOMEM;
578 }
579
580 info->hdev = hdev;
581
582 hdev->bus = HCI_PCCARD;
583 hdev->driver_data = info;
584 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
585
586 hdev->open = bt3c_hci_open;
587 hdev->close = bt3c_hci_close;
588 hdev->flush = bt3c_hci_flush;
589 hdev->send = bt3c_hci_send_frame;
590 hdev->destruct = bt3c_hci_destruct;
591 hdev->ioctl = bt3c_hci_ioctl;
592
593 hdev->owner = THIS_MODULE;
594
595 /* Load firmware */
596 err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
597 if (err < 0) {
598 BT_ERR("Firmware request failed");
599 goto error;
600 }
601
602 err = bt3c_load_firmware(info, firmware->data, firmware->size);
603
604 release_firmware(firmware);
605
606 if (err < 0) {
607 BT_ERR("Firmware loading failed");
608 goto error;
609 }
610
611 /* Timeout before it is safe to send the first HCI packet */
612 msleep(1000);
613
614 /* Register HCI device */
615 err = hci_register_dev(hdev);
616 if (err < 0) {
617 BT_ERR("Can't register HCI device");
618 goto error;
619 }
620
621 return 0;
622
623error:
624 info->hdev = NULL;
625 hci_free_dev(hdev);
626 return err;
627}
628
629
630static int bt3c_close(bt3c_info_t *info)
631{
632 struct hci_dev *hdev = info->hdev;
633
634 if (!hdev)
635 return -ENODEV;
636
637 bt3c_hci_close(hdev);
638
639 if (hci_unregister_dev(hdev) < 0)
640 BT_ERR("Can't unregister HCI device %s", hdev->name);
641
642 hci_free_dev(hdev);
643
644 return 0;
645}
646
647static int bt3c_probe(struct pcmcia_device *link)
648{
649 bt3c_info_t *info;
650
651 /* Create new info device */
652 info = kzalloc(sizeof(*info), GFP_KERNEL);
653 if (!info)
654 return -ENOMEM;
655
656 info->p_dev = link;
657 link->priv = info;
658
659 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
660 CONF_AUTO_SET_IO;
661
662 return bt3c_config(link);
663}
664
665
666static void bt3c_detach(struct pcmcia_device *link)
667{
668 bt3c_info_t *info = link->priv;
669
670 bt3c_release(link);
671 kfree(info);
672}
673
674static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
675{
676 int *try = priv_data;
677
678 if (try == 0)
679 p_dev->io_lines = 16;
680
681 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
682 return -EINVAL;
683
684 p_dev->resource[0]->end = 8;
685 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
686 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
687
688 return pcmcia_request_io(p_dev);
689}
690
691static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
692 void *priv_data)
693{
694 static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
695 int j;
696
697 if (p_dev->io_lines > 3)
698 return -ENODEV;
699
700 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
701 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
702 p_dev->resource[0]->end = 8;
703
704 for (j = 0; j < 5; j++) {
705 p_dev->resource[0]->start = base[j];
706 p_dev->io_lines = base[j] ? 16 : 3;
707 if (!pcmcia_request_io(p_dev))
708 return 0;
709 }
710 return -ENODEV;
711}
712
713static int bt3c_config(struct pcmcia_device *link)
714{
715 bt3c_info_t *info = link->priv;
716 int i;
717 unsigned long try;
718
719 /* First pass: look for a config entry that looks normal.
720 Two tries: without IO aliases, then with aliases */
721 for (try = 0; try < 2; try++)
722 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
723 goto found_port;
724
725 /* Second pass: try to find an entry that isn't picky about
726 its base address, then try to grab any standard serial port
727 address, and finally try to get any free port. */
728 if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
729 goto found_port;
730
731 BT_ERR("No usable port range found");
732 goto failed;
733
734found_port:
735 i = pcmcia_request_irq(link, &bt3c_interrupt);
736 if (i != 0)
737 goto failed;
738
739 i = pcmcia_enable_device(link);
740 if (i != 0)
741 goto failed;
742
743 if (bt3c_open(info) != 0)
744 goto failed;
745
746 return 0;
747
748failed:
749 bt3c_release(link);
750 return -ENODEV;
751}
752
753
754static void bt3c_release(struct pcmcia_device *link)
755{
756 bt3c_info_t *info = link->priv;
757
758 bt3c_close(info);
759
760 pcmcia_disable_device(link);
761}
762
763
764static const struct pcmcia_device_id bt3c_ids[] = {
765 PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
766 PCMCIA_DEVICE_NULL
767};
768MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
769
770static struct pcmcia_driver bt3c_driver = {
771 .owner = THIS_MODULE,
772 .name = "bt3c_cs",
773 .probe = bt3c_probe,
774 .remove = bt3c_detach,
775 .id_table = bt3c_ids,
776};
777
778static int __init init_bt3c_cs(void)
779{
780 return pcmcia_register_driver(&bt3c_driver);
781}
782
783
784static void __exit exit_bt3c_cs(void)
785{
786 pcmcia_unregister_driver(&bt3c_driver);
787}
788
789module_init(init_bt3c_cs);
790module_exit(exit_bt3c_cs);
1/*
2 *
3 * Driver for the 3Com Bluetooth PCMCIA card
4 *
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
6 * Jose Orlando Pereira <jop@di.uminho.pt>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation;
12 *
13 * Software distributed under the License is distributed on an "AS
14 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
15 * implied. See the License for the specific language governing
16 * rights and limitations under the License.
17 *
18 * The initial developer of the original code is David A. Hinds
19 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
20 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
21 *
22 */
23
24#include <linux/module.h>
25
26#include <linux/kernel.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/types.h>
30#include <linux/delay.h>
31#include <linux/errno.h>
32#include <linux/ptrace.h>
33#include <linux/ioport.h>
34#include <linux/spinlock.h>
35#include <linux/moduleparam.h>
36
37#include <linux/skbuff.h>
38#include <linux/string.h>
39#include <linux/serial.h>
40#include <linux/serial_reg.h>
41#include <linux/bitops.h>
42#include <asm/io.h>
43
44#include <linux/device.h>
45#include <linux/firmware.h>
46
47#include <pcmcia/cistpl.h>
48#include <pcmcia/ciscode.h>
49#include <pcmcia/ds.h>
50#include <pcmcia/cisreg.h>
51
52#include <net/bluetooth/bluetooth.h>
53#include <net/bluetooth/hci_core.h>
54
55
56
57/* ======================== Module parameters ======================== */
58
59
60MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
61MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
62MODULE_LICENSE("GPL");
63MODULE_FIRMWARE("BT3CPCC.bin");
64
65
66
67/* ======================== Local structures ======================== */
68
69
70struct bt3c_info {
71 struct pcmcia_device *p_dev;
72
73 struct hci_dev *hdev;
74
75 spinlock_t lock; /* For serializing operations */
76
77 struct sk_buff_head txq;
78 unsigned long tx_state;
79
80 unsigned long rx_state;
81 unsigned long rx_count;
82 struct sk_buff *rx_skb;
83};
84
85
86static int bt3c_config(struct pcmcia_device *link);
87static void bt3c_release(struct pcmcia_device *link);
88
89static void bt3c_detach(struct pcmcia_device *p_dev);
90
91
92/* Transmit states */
93#define XMIT_SENDING 1
94#define XMIT_WAKEUP 2
95#define XMIT_WAITING 8
96
97/* Receiver states */
98#define RECV_WAIT_PACKET_TYPE 0
99#define RECV_WAIT_EVENT_HEADER 1
100#define RECV_WAIT_ACL_HEADER 2
101#define RECV_WAIT_SCO_HEADER 3
102#define RECV_WAIT_DATA 4
103
104
105
106/* ======================== Special I/O functions ======================== */
107
108
109#define DATA_L 0
110#define DATA_H 1
111#define ADDR_L 2
112#define ADDR_H 3
113#define CONTROL 4
114
115
116static inline void bt3c_address(unsigned int iobase, unsigned short addr)
117{
118 outb(addr & 0xff, iobase + ADDR_L);
119 outb((addr >> 8) & 0xff, iobase + ADDR_H);
120}
121
122
123static inline void bt3c_put(unsigned int iobase, unsigned short value)
124{
125 outb(value & 0xff, iobase + DATA_L);
126 outb((value >> 8) & 0xff, iobase + DATA_H);
127}
128
129
130static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
131{
132 bt3c_address(iobase, addr);
133 bt3c_put(iobase, value);
134}
135
136
137static inline unsigned short bt3c_get(unsigned int iobase)
138{
139 unsigned short value = inb(iobase + DATA_L);
140
141 value |= inb(iobase + DATA_H) << 8;
142
143 return value;
144}
145
146
147static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
148{
149 bt3c_address(iobase, addr);
150
151 return bt3c_get(iobase);
152}
153
154
155
156/* ======================== Interrupt handling ======================== */
157
158
159static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
160{
161 int actual = 0;
162
163 bt3c_address(iobase, 0x7080);
164
165 /* Fill FIFO with current frame */
166 while (actual < len) {
167 /* Transmit next byte */
168 bt3c_put(iobase, buf[actual]);
169 actual++;
170 }
171
172 bt3c_io_write(iobase, 0x7005, actual);
173
174 return actual;
175}
176
177
178static void bt3c_write_wakeup(struct bt3c_info *info)
179{
180 if (!info) {
181 BT_ERR("Unknown device");
182 return;
183 }
184
185 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
186 return;
187
188 do {
189 unsigned int iobase = info->p_dev->resource[0]->start;
190 register struct sk_buff *skb;
191 int len;
192
193 if (!pcmcia_dev_present(info->p_dev))
194 break;
195
196 skb = skb_dequeue(&(info->txq));
197 if (!skb) {
198 clear_bit(XMIT_SENDING, &(info->tx_state));
199 break;
200 }
201
202 /* Send frame */
203 len = bt3c_write(iobase, 256, skb->data, skb->len);
204
205 if (len != skb->len)
206 BT_ERR("Very strange");
207
208 kfree_skb(skb);
209
210 info->hdev->stat.byte_tx += len;
211
212 } while (0);
213}
214
215
216static void bt3c_receive(struct bt3c_info *info)
217{
218 unsigned int iobase;
219 int size = 0, avail;
220
221 if (!info) {
222 BT_ERR("Unknown device");
223 return;
224 }
225
226 iobase = info->p_dev->resource[0]->start;
227
228 avail = bt3c_read(iobase, 0x7006);
229
230 bt3c_address(iobase, 0x7480);
231 while (size < avail) {
232 size++;
233 info->hdev->stat.byte_rx++;
234
235 /* Allocate packet */
236 if (!info->rx_skb) {
237 info->rx_state = RECV_WAIT_PACKET_TYPE;
238 info->rx_count = 0;
239 info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
240 if (!info->rx_skb) {
241 BT_ERR("Can't allocate mem for new packet");
242 return;
243 }
244 }
245
246
247 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
248
249 hci_skb_pkt_type(info->rx_skb) = inb(iobase + DATA_L);
250 inb(iobase + DATA_H);
251
252 switch (hci_skb_pkt_type(info->rx_skb)) {
253
254 case HCI_EVENT_PKT:
255 info->rx_state = RECV_WAIT_EVENT_HEADER;
256 info->rx_count = HCI_EVENT_HDR_SIZE;
257 break;
258
259 case HCI_ACLDATA_PKT:
260 info->rx_state = RECV_WAIT_ACL_HEADER;
261 info->rx_count = HCI_ACL_HDR_SIZE;
262 break;
263
264 case HCI_SCODATA_PKT:
265 info->rx_state = RECV_WAIT_SCO_HEADER;
266 info->rx_count = HCI_SCO_HDR_SIZE;
267 break;
268
269 default:
270 /* Unknown packet */
271 BT_ERR("Unknown HCI packet with type 0x%02x received",
272 hci_skb_pkt_type(info->rx_skb));
273 info->hdev->stat.err_rx++;
274
275 kfree_skb(info->rx_skb);
276 info->rx_skb = NULL;
277 break;
278
279 }
280
281 } else {
282
283 __u8 x = inb(iobase + DATA_L);
284
285 skb_put_u8(info->rx_skb, x);
286 inb(iobase + DATA_H);
287 info->rx_count--;
288
289 if (info->rx_count == 0) {
290
291 int dlen;
292 struct hci_event_hdr *eh;
293 struct hci_acl_hdr *ah;
294 struct hci_sco_hdr *sh;
295
296 switch (info->rx_state) {
297
298 case RECV_WAIT_EVENT_HEADER:
299 eh = hci_event_hdr(info->rx_skb);
300 info->rx_state = RECV_WAIT_DATA;
301 info->rx_count = eh->plen;
302 break;
303
304 case RECV_WAIT_ACL_HEADER:
305 ah = hci_acl_hdr(info->rx_skb);
306 dlen = __le16_to_cpu(ah->dlen);
307 info->rx_state = RECV_WAIT_DATA;
308 info->rx_count = dlen;
309 break;
310
311 case RECV_WAIT_SCO_HEADER:
312 sh = hci_sco_hdr(info->rx_skb);
313 info->rx_state = RECV_WAIT_DATA;
314 info->rx_count = sh->dlen;
315 break;
316
317 case RECV_WAIT_DATA:
318 hci_recv_frame(info->hdev, info->rx_skb);
319 info->rx_skb = NULL;
320 break;
321
322 }
323
324 }
325
326 }
327
328 }
329
330 bt3c_io_write(iobase, 0x7006, 0x0000);
331}
332
333
334static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
335{
336 struct bt3c_info *info = dev_inst;
337 unsigned int iobase;
338 int iir;
339 irqreturn_t r = IRQ_NONE;
340
341 if (!info || !info->hdev)
342 /* our irq handler is shared */
343 return IRQ_NONE;
344
345 iobase = info->p_dev->resource[0]->start;
346
347 spin_lock(&(info->lock));
348
349 iir = inb(iobase + CONTROL);
350 if (iir & 0x80) {
351 int stat = bt3c_read(iobase, 0x7001);
352
353 if ((stat & 0xff) == 0x7f) {
354 BT_ERR("Very strange (stat=0x%04x)", stat);
355 } else if ((stat & 0xff) != 0xff) {
356 if (stat & 0x0020) {
357 int status = bt3c_read(iobase, 0x7002) & 0x10;
358 bt_dev_info(info->hdev, "Antenna %s",
359 status ? "out" : "in");
360 }
361 if (stat & 0x0001)
362 bt3c_receive(info);
363 if (stat & 0x0002) {
364 clear_bit(XMIT_SENDING, &(info->tx_state));
365 bt3c_write_wakeup(info);
366 }
367
368 bt3c_io_write(iobase, 0x7001, 0x0000);
369
370 outb(iir, iobase + CONTROL);
371 }
372 r = IRQ_HANDLED;
373 }
374
375 spin_unlock(&(info->lock));
376
377 return r;
378}
379
380
381
382/* ======================== HCI interface ======================== */
383
384
385static int bt3c_hci_flush(struct hci_dev *hdev)
386{
387 struct bt3c_info *info = hci_get_drvdata(hdev);
388
389 /* Drop TX queue */
390 skb_queue_purge(&(info->txq));
391
392 return 0;
393}
394
395
396static int bt3c_hci_open(struct hci_dev *hdev)
397{
398 return 0;
399}
400
401
402static int bt3c_hci_close(struct hci_dev *hdev)
403{
404 bt3c_hci_flush(hdev);
405
406 return 0;
407}
408
409
410static int bt3c_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
411{
412 struct bt3c_info *info = hci_get_drvdata(hdev);
413 unsigned long flags;
414
415 switch (hci_skb_pkt_type(skb)) {
416 case HCI_COMMAND_PKT:
417 hdev->stat.cmd_tx++;
418 break;
419 case HCI_ACLDATA_PKT:
420 hdev->stat.acl_tx++;
421 break;
422 case HCI_SCODATA_PKT:
423 hdev->stat.sco_tx++;
424 break;
425 }
426
427 /* Prepend skb with frame type */
428 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
429 skb_queue_tail(&(info->txq), skb);
430
431 spin_lock_irqsave(&(info->lock), flags);
432
433 bt3c_write_wakeup(info);
434
435 spin_unlock_irqrestore(&(info->lock), flags);
436
437 return 0;
438}
439
440
441
442/* ======================== Card services HCI interaction ======================== */
443
444
445static int bt3c_load_firmware(struct bt3c_info *info,
446 const unsigned char *firmware,
447 int count)
448{
449 char *ptr = (char *) firmware;
450 char b[9];
451 unsigned int iobase, tmp, tn;
452 unsigned long size, addr, fcs;
453 int i, err = 0;
454
455 iobase = info->p_dev->resource[0]->start;
456
457 /* Reset */
458 bt3c_io_write(iobase, 0x8040, 0x0404);
459 bt3c_io_write(iobase, 0x8040, 0x0400);
460
461 udelay(1);
462
463 bt3c_io_write(iobase, 0x8040, 0x0404);
464
465 udelay(17);
466
467 /* Load */
468 while (count) {
469 if (ptr[0] != 'S') {
470 BT_ERR("Bad address in firmware");
471 err = -EFAULT;
472 goto error;
473 }
474
475 memset(b, 0, sizeof(b));
476 memcpy(b, ptr + 2, 2);
477 if (kstrtoul(b, 16, &size) < 0)
478 return -EINVAL;
479
480 memset(b, 0, sizeof(b));
481 memcpy(b, ptr + 4, 8);
482 if (kstrtoul(b, 16, &addr) < 0)
483 return -EINVAL;
484
485 memset(b, 0, sizeof(b));
486 memcpy(b, ptr + (size * 2) + 2, 2);
487 if (kstrtoul(b, 16, &fcs) < 0)
488 return -EINVAL;
489
490 memset(b, 0, sizeof(b));
491 for (tmp = 0, i = 0; i < size; i++) {
492 memcpy(b, ptr + (i * 2) + 2, 2);
493 if (kstrtouint(b, 16, &tn))
494 return -EINVAL;
495 tmp += tn;
496 }
497
498 if (((tmp + fcs) & 0xff) != 0xff) {
499 BT_ERR("Checksum error in firmware");
500 err = -EILSEQ;
501 goto error;
502 }
503
504 if (ptr[1] == '3') {
505 bt3c_address(iobase, addr);
506
507 memset(b, 0, sizeof(b));
508 for (i = 0; i < (size - 4) / 2; i++) {
509 memcpy(b, ptr + (i * 4) + 12, 4);
510 if (kstrtouint(b, 16, &tmp))
511 return -EINVAL;
512 bt3c_put(iobase, tmp);
513 }
514 }
515
516 ptr += (size * 2) + 6;
517 count -= (size * 2) + 6;
518 }
519
520 udelay(17);
521
522 /* Boot */
523 bt3c_address(iobase, 0x3000);
524 outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
525
526error:
527 udelay(17);
528
529 /* Clear */
530 bt3c_io_write(iobase, 0x7006, 0x0000);
531 bt3c_io_write(iobase, 0x7005, 0x0000);
532 bt3c_io_write(iobase, 0x7001, 0x0000);
533
534 return err;
535}
536
537
538static int bt3c_open(struct bt3c_info *info)
539{
540 const struct firmware *firmware;
541 struct hci_dev *hdev;
542 int err;
543
544 spin_lock_init(&(info->lock));
545
546 skb_queue_head_init(&(info->txq));
547
548 info->rx_state = RECV_WAIT_PACKET_TYPE;
549 info->rx_count = 0;
550 info->rx_skb = NULL;
551
552 /* Initialize HCI device */
553 hdev = hci_alloc_dev();
554 if (!hdev) {
555 BT_ERR("Can't allocate HCI device");
556 return -ENOMEM;
557 }
558
559 info->hdev = hdev;
560
561 hdev->bus = HCI_PCCARD;
562 hci_set_drvdata(hdev, info);
563 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
564
565 hdev->open = bt3c_hci_open;
566 hdev->close = bt3c_hci_close;
567 hdev->flush = bt3c_hci_flush;
568 hdev->send = bt3c_hci_send_frame;
569
570 /* Load firmware */
571 err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
572 if (err < 0) {
573 BT_ERR("Firmware request failed");
574 goto error;
575 }
576
577 err = bt3c_load_firmware(info, firmware->data, firmware->size);
578
579 release_firmware(firmware);
580
581 if (err < 0) {
582 BT_ERR("Firmware loading failed");
583 goto error;
584 }
585
586 /* Timeout before it is safe to send the first HCI packet */
587 msleep(1000);
588
589 /* Register HCI device */
590 err = hci_register_dev(hdev);
591 if (err < 0) {
592 BT_ERR("Can't register HCI device");
593 goto error;
594 }
595
596 return 0;
597
598error:
599 info->hdev = NULL;
600 hci_free_dev(hdev);
601 return err;
602}
603
604
605static int bt3c_close(struct bt3c_info *info)
606{
607 struct hci_dev *hdev = info->hdev;
608
609 if (!hdev)
610 return -ENODEV;
611
612 bt3c_hci_close(hdev);
613
614 hci_unregister_dev(hdev);
615 hci_free_dev(hdev);
616
617 return 0;
618}
619
620static int bt3c_probe(struct pcmcia_device *link)
621{
622 struct bt3c_info *info;
623
624 /* Create new info device */
625 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
626 if (!info)
627 return -ENOMEM;
628
629 info->p_dev = link;
630 link->priv = info;
631
632 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
633 CONF_AUTO_SET_IO;
634
635 return bt3c_config(link);
636}
637
638
639static void bt3c_detach(struct pcmcia_device *link)
640{
641 bt3c_release(link);
642}
643
644static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
645{
646 int *try = priv_data;
647
648 if (!try)
649 p_dev->io_lines = 16;
650
651 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
652 return -EINVAL;
653
654 p_dev->resource[0]->end = 8;
655 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
656 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
657
658 return pcmcia_request_io(p_dev);
659}
660
661static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
662 void *priv_data)
663{
664 static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
665 int j;
666
667 if (p_dev->io_lines > 3)
668 return -ENODEV;
669
670 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
671 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
672 p_dev->resource[0]->end = 8;
673
674 for (j = 0; j < 5; j++) {
675 p_dev->resource[0]->start = base[j];
676 p_dev->io_lines = base[j] ? 16 : 3;
677 if (!pcmcia_request_io(p_dev))
678 return 0;
679 }
680 return -ENODEV;
681}
682
683static int bt3c_config(struct pcmcia_device *link)
684{
685 struct bt3c_info *info = link->priv;
686 int i;
687 unsigned long try;
688
689 /* First pass: look for a config entry that looks normal.
690 * Two tries: without IO aliases, then with aliases
691 */
692 for (try = 0; try < 2; try++)
693 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
694 goto found_port;
695
696 /* Second pass: try to find an entry that isn't picky about
697 * its base address, then try to grab any standard serial port
698 * address, and finally try to get any free port.
699 */
700 if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
701 goto found_port;
702
703 BT_ERR("No usable port range found");
704 goto failed;
705
706found_port:
707 i = pcmcia_request_irq(link, &bt3c_interrupt);
708 if (i != 0)
709 goto failed;
710
711 i = pcmcia_enable_device(link);
712 if (i != 0)
713 goto failed;
714
715 if (bt3c_open(info) != 0)
716 goto failed;
717
718 return 0;
719
720failed:
721 bt3c_release(link);
722 return -ENODEV;
723}
724
725
726static void bt3c_release(struct pcmcia_device *link)
727{
728 struct bt3c_info *info = link->priv;
729
730 bt3c_close(info);
731
732 pcmcia_disable_device(link);
733}
734
735
736static const struct pcmcia_device_id bt3c_ids[] = {
737 PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
738 PCMCIA_DEVICE_NULL
739};
740MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
741
742static struct pcmcia_driver bt3c_driver = {
743 .owner = THIS_MODULE,
744 .name = "bt3c_cs",
745 .probe = bt3c_probe,
746 .remove = bt3c_detach,
747 .id_table = bt3c_ids,
748};
749module_pcmcia_driver(bt3c_driver);