Merge remote-tracking branch 'regulator/fix/dbx500' into regulator-linus
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / bluetooth / bt3c_cs.c
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
60 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
61 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
62 MODULE_LICENSE("GPL");
63 MODULE_FIRMWARE("BT3CPCC.bin");
64
65
66
67 /* ======================== Local structures ======================== */
68
69
70 typedef struct bt3c_info_t {
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 } bt3c_info_t;
84
85
86 static int bt3c_config(struct pcmcia_device *link);
87 static void bt3c_release(struct pcmcia_device *link);
88
89 static 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
116 static 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
123 static 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
130 static 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
137 static 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
147 static 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
159 static 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
178 static void bt3c_write_wakeup(bt3c_info_t *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
197 if (!(skb = skb_dequeue(&(info->txq)))) {
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
209 kfree_skb(skb);
210
211 info->hdev->stat.byte_tx += len;
212
213 } while (0);
214 }
215
216
217 static void bt3c_receive(bt3c_info_t *info)
218 {
219 unsigned int iobase;
220 int size = 0, avail;
221
222 if (!info) {
223 BT_ERR("Unknown device");
224 return;
225 }
226
227 iobase = info->p_dev->resource[0]->start;
228
229 avail = bt3c_read(iobase, 0x7006);
230 //printk("bt3c_cs: receiving %d bytes\n", avail);
231
232 bt3c_address(iobase, 0x7480);
233 while (size < avail) {
234 size++;
235 info->hdev->stat.byte_rx++;
236
237 /* Allocate packet */
238 if (info->rx_skb == NULL) {
239 info->rx_state = RECV_WAIT_PACKET_TYPE;
240 info->rx_count = 0;
241 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
242 BT_ERR("Can't allocate mem for new packet");
243 return;
244 }
245 }
246
247
248 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
249
250 info->rx_skb->dev = (void *) info->hdev;
251 bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
252 inb(iobase + DATA_H);
253 //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
254
255 switch (bt_cb(info->rx_skb)->pkt_type) {
256
257 case HCI_EVENT_PKT:
258 info->rx_state = RECV_WAIT_EVENT_HEADER;
259 info->rx_count = HCI_EVENT_HDR_SIZE;
260 break;
261
262 case HCI_ACLDATA_PKT:
263 info->rx_state = RECV_WAIT_ACL_HEADER;
264 info->rx_count = HCI_ACL_HDR_SIZE;
265 break;
266
267 case HCI_SCODATA_PKT:
268 info->rx_state = RECV_WAIT_SCO_HEADER;
269 info->rx_count = HCI_SCO_HDR_SIZE;
270 break;
271
272 default:
273 /* Unknown packet */
274 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
275 info->hdev->stat.err_rx++;
276 clear_bit(HCI_RUNNING, &(info->hdev->flags));
277
278 kfree_skb(info->rx_skb);
279 info->rx_skb = NULL;
280 break;
281
282 }
283
284 } else {
285
286 __u8 x = inb(iobase + DATA_L);
287
288 *skb_put(info->rx_skb, 1) = x;
289 inb(iobase + DATA_H);
290 info->rx_count--;
291
292 if (info->rx_count == 0) {
293
294 int dlen;
295 struct hci_event_hdr *eh;
296 struct hci_acl_hdr *ah;
297 struct hci_sco_hdr *sh;
298
299 switch (info->rx_state) {
300
301 case RECV_WAIT_EVENT_HEADER:
302 eh = hci_event_hdr(info->rx_skb);
303 info->rx_state = RECV_WAIT_DATA;
304 info->rx_count = eh->plen;
305 break;
306
307 case RECV_WAIT_ACL_HEADER:
308 ah = hci_acl_hdr(info->rx_skb);
309 dlen = __le16_to_cpu(ah->dlen);
310 info->rx_state = RECV_WAIT_DATA;
311 info->rx_count = dlen;
312 break;
313
314 case RECV_WAIT_SCO_HEADER:
315 sh = hci_sco_hdr(info->rx_skb);
316 info->rx_state = RECV_WAIT_DATA;
317 info->rx_count = sh->dlen;
318 break;
319
320 case RECV_WAIT_DATA:
321 hci_recv_frame(info->rx_skb);
322 info->rx_skb = NULL;
323 break;
324
325 }
326
327 }
328
329 }
330
331 }
332
333 bt3c_io_write(iobase, 0x7006, 0x0000);
334 }
335
336
337 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
338 {
339 bt3c_info_t *info = dev_inst;
340 unsigned int iobase;
341 int iir;
342 irqreturn_t r = IRQ_NONE;
343
344 if (!info || !info->hdev)
345 /* our irq handler is shared */
346 return IRQ_NONE;
347
348 iobase = info->p_dev->resource[0]->start;
349
350 spin_lock(&(info->lock));
351
352 iir = inb(iobase + CONTROL);
353 if (iir & 0x80) {
354 int stat = bt3c_read(iobase, 0x7001);
355
356 if ((stat & 0xff) == 0x7f) {
357 BT_ERR("Very strange (stat=0x%04x)", stat);
358 } else if ((stat & 0xff) != 0xff) {
359 if (stat & 0x0020) {
360 int status = bt3c_read(iobase, 0x7002) & 0x10;
361 BT_INFO("%s: Antenna %s", info->hdev->name,
362 status ? "out" : "in");
363 }
364 if (stat & 0x0001)
365 bt3c_receive(info);
366 if (stat & 0x0002) {
367 //BT_ERR("Ack (stat=0x%04x)", stat);
368 clear_bit(XMIT_SENDING, &(info->tx_state));
369 bt3c_write_wakeup(info);
370 }
371
372 bt3c_io_write(iobase, 0x7001, 0x0000);
373
374 outb(iir, iobase + CONTROL);
375 }
376 r = IRQ_HANDLED;
377 }
378
379 spin_unlock(&(info->lock));
380
381 return r;
382 }
383
384
385
386 /* ======================== HCI interface ======================== */
387
388
389 static int bt3c_hci_flush(struct hci_dev *hdev)
390 {
391 bt3c_info_t *info = hci_get_drvdata(hdev);
392
393 /* Drop TX queue */
394 skb_queue_purge(&(info->txq));
395
396 return 0;
397 }
398
399
400 static int bt3c_hci_open(struct hci_dev *hdev)
401 {
402 set_bit(HCI_RUNNING, &(hdev->flags));
403
404 return 0;
405 }
406
407
408 static int bt3c_hci_close(struct hci_dev *hdev)
409 {
410 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
411 return 0;
412
413 bt3c_hci_flush(hdev);
414
415 return 0;
416 }
417
418
419 static int bt3c_hci_send_frame(struct sk_buff *skb)
420 {
421 bt3c_info_t *info;
422 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
423 unsigned long flags;
424
425 if (!hdev) {
426 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
427 return -ENODEV;
428 }
429
430 info = hci_get_drvdata(hdev);
431
432 switch (bt_cb(skb)->pkt_type) {
433 case HCI_COMMAND_PKT:
434 hdev->stat.cmd_tx++;
435 break;
436 case HCI_ACLDATA_PKT:
437 hdev->stat.acl_tx++;
438 break;
439 case HCI_SCODATA_PKT:
440 hdev->stat.sco_tx++;
441 break;
442 };
443
444 /* Prepend skb with frame type */
445 memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
446 skb_queue_tail(&(info->txq), skb);
447
448 spin_lock_irqsave(&(info->lock), flags);
449
450 bt3c_write_wakeup(info);
451
452 spin_unlock_irqrestore(&(info->lock), flags);
453
454 return 0;
455 }
456
457
458 static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
459 {
460 return -ENOIOCTLCMD;
461 }
462
463
464
465 /* ======================== Card services HCI interaction ======================== */
466
467
468 static int bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware,
469 int count)
470 {
471 char *ptr = (char *) firmware;
472 char b[9];
473 unsigned int iobase, size, addr, fcs, tmp;
474 int i, err = 0;
475
476 iobase = info->p_dev->resource[0]->start;
477
478 /* Reset */
479 bt3c_io_write(iobase, 0x8040, 0x0404);
480 bt3c_io_write(iobase, 0x8040, 0x0400);
481
482 udelay(1);
483
484 bt3c_io_write(iobase, 0x8040, 0x0404);
485
486 udelay(17);
487
488 /* Load */
489 while (count) {
490 if (ptr[0] != 'S') {
491 BT_ERR("Bad address in firmware");
492 err = -EFAULT;
493 goto error;
494 }
495
496 memset(b, 0, sizeof(b));
497 memcpy(b, ptr + 2, 2);
498 size = simple_strtoul(b, NULL, 16);
499
500 memset(b, 0, sizeof(b));
501 memcpy(b, ptr + 4, 8);
502 addr = simple_strtoul(b, NULL, 16);
503
504 memset(b, 0, sizeof(b));
505 memcpy(b, ptr + (size * 2) + 2, 2);
506 fcs = simple_strtoul(b, NULL, 16);
507
508 memset(b, 0, sizeof(b));
509 for (tmp = 0, i = 0; i < size; i++) {
510 memcpy(b, ptr + (i * 2) + 2, 2);
511 tmp += simple_strtol(b, NULL, 16);
512 }
513
514 if (((tmp + fcs) & 0xff) != 0xff) {
515 BT_ERR("Checksum error in firmware");
516 err = -EILSEQ;
517 goto error;
518 }
519
520 if (ptr[1] == '3') {
521 bt3c_address(iobase, addr);
522
523 memset(b, 0, sizeof(b));
524 for (i = 0; i < (size - 4) / 2; i++) {
525 memcpy(b, ptr + (i * 4) + 12, 4);
526 tmp = simple_strtoul(b, NULL, 16);
527 bt3c_put(iobase, tmp);
528 }
529 }
530
531 ptr += (size * 2) + 6;
532 count -= (size * 2) + 6;
533 }
534
535 udelay(17);
536
537 /* Boot */
538 bt3c_address(iobase, 0x3000);
539 outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
540
541 error:
542 udelay(17);
543
544 /* Clear */
545 bt3c_io_write(iobase, 0x7006, 0x0000);
546 bt3c_io_write(iobase, 0x7005, 0x0000);
547 bt3c_io_write(iobase, 0x7001, 0x0000);
548
549 return err;
550 }
551
552
553 static int bt3c_open(bt3c_info_t *info)
554 {
555 const struct firmware *firmware;
556 struct hci_dev *hdev;
557 int err;
558
559 spin_lock_init(&(info->lock));
560
561 skb_queue_head_init(&(info->txq));
562
563 info->rx_state = RECV_WAIT_PACKET_TYPE;
564 info->rx_count = 0;
565 info->rx_skb = NULL;
566
567 /* Initialize HCI device */
568 hdev = hci_alloc_dev();
569 if (!hdev) {
570 BT_ERR("Can't allocate HCI device");
571 return -ENOMEM;
572 }
573
574 info->hdev = hdev;
575
576 hdev->bus = HCI_PCCARD;
577 hci_set_drvdata(hdev, info);
578 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
579
580 hdev->open = bt3c_hci_open;
581 hdev->close = bt3c_hci_close;
582 hdev->flush = bt3c_hci_flush;
583 hdev->send = bt3c_hci_send_frame;
584 hdev->ioctl = bt3c_hci_ioctl;
585
586 /* Load firmware */
587 err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
588 if (err < 0) {
589 BT_ERR("Firmware request failed");
590 goto error;
591 }
592
593 err = bt3c_load_firmware(info, firmware->data, firmware->size);
594
595 release_firmware(firmware);
596
597 if (err < 0) {
598 BT_ERR("Firmware loading failed");
599 goto error;
600 }
601
602 /* Timeout before it is safe to send the first HCI packet */
603 msleep(1000);
604
605 /* Register HCI device */
606 err = hci_register_dev(hdev);
607 if (err < 0) {
608 BT_ERR("Can't register HCI device");
609 goto error;
610 }
611
612 return 0;
613
614 error:
615 info->hdev = NULL;
616 hci_free_dev(hdev);
617 return err;
618 }
619
620
621 static int bt3c_close(bt3c_info_t *info)
622 {
623 struct hci_dev *hdev = info->hdev;
624
625 if (!hdev)
626 return -ENODEV;
627
628 bt3c_hci_close(hdev);
629
630 hci_unregister_dev(hdev);
631 hci_free_dev(hdev);
632
633 return 0;
634 }
635
636 static int bt3c_probe(struct pcmcia_device *link)
637 {
638 bt3c_info_t *info;
639
640 /* Create new info device */
641 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
642 if (!info)
643 return -ENOMEM;
644
645 info->p_dev = link;
646 link->priv = info;
647
648 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
649 CONF_AUTO_SET_IO;
650
651 return bt3c_config(link);
652 }
653
654
655 static void bt3c_detach(struct pcmcia_device *link)
656 {
657 bt3c_release(link);
658 }
659
660 static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
661 {
662 int *try = priv_data;
663
664 if (!try)
665 p_dev->io_lines = 16;
666
667 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
668 return -EINVAL;
669
670 p_dev->resource[0]->end = 8;
671 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
672 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
673
674 return pcmcia_request_io(p_dev);
675 }
676
677 static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
678 void *priv_data)
679 {
680 static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
681 int j;
682
683 if (p_dev->io_lines > 3)
684 return -ENODEV;
685
686 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
687 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
688 p_dev->resource[0]->end = 8;
689
690 for (j = 0; j < 5; j++) {
691 p_dev->resource[0]->start = base[j];
692 p_dev->io_lines = base[j] ? 16 : 3;
693 if (!pcmcia_request_io(p_dev))
694 return 0;
695 }
696 return -ENODEV;
697 }
698
699 static int bt3c_config(struct pcmcia_device *link)
700 {
701 bt3c_info_t *info = link->priv;
702 int i;
703 unsigned long try;
704
705 /* First pass: look for a config entry that looks normal.
706 Two tries: without IO aliases, then with aliases */
707 for (try = 0; try < 2; try++)
708 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
709 goto found_port;
710
711 /* Second pass: try to find an entry that isn't picky about
712 its base address, then try to grab any standard serial port
713 address, and finally try to get any free port. */
714 if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
715 goto found_port;
716
717 BT_ERR("No usable port range found");
718 goto failed;
719
720 found_port:
721 i = pcmcia_request_irq(link, &bt3c_interrupt);
722 if (i != 0)
723 goto failed;
724
725 i = pcmcia_enable_device(link);
726 if (i != 0)
727 goto failed;
728
729 if (bt3c_open(info) != 0)
730 goto failed;
731
732 return 0;
733
734 failed:
735 bt3c_release(link);
736 return -ENODEV;
737 }
738
739
740 static void bt3c_release(struct pcmcia_device *link)
741 {
742 bt3c_info_t *info = link->priv;
743
744 bt3c_close(info);
745
746 pcmcia_disable_device(link);
747 }
748
749
750 static const struct pcmcia_device_id bt3c_ids[] = {
751 PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
752 PCMCIA_DEVICE_NULL
753 };
754 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
755
756 static struct pcmcia_driver bt3c_driver = {
757 .owner = THIS_MODULE,
758 .name = "bt3c_cs",
759 .probe = bt3c_probe,
760 .remove = bt3c_detach,
761 .id_table = bt3c_ids,
762 };
763 module_pcmcia_driver(bt3c_driver);