Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

Linux/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 struct 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 
 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(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 
216 static 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                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
250                         inb(iobase + DATA_H);
251 
252                         switch (bt_cb(info->rx_skb)->pkt_type) {
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", bt_cb(info->rx_skb)->pkt_type);
272                                 info->hdev->stat.err_rx++;
273 
274                                 kfree_skb(info->rx_skb);
275                                 info->rx_skb = NULL;
276                                 break;
277 
278                         }
279 
280                 } else {
281 
282                         __u8 x = inb(iobase + DATA_L);
283 
284                         *skb_put(info->rx_skb, 1) = x;
285                         inb(iobase + DATA_H);
286                         info->rx_count--;
287 
288                         if (info->rx_count == 0) {
289 
290                                 int dlen;
291                                 struct hci_event_hdr *eh;
292                                 struct hci_acl_hdr *ah;
293                                 struct hci_sco_hdr *sh;
294 
295                                 switch (info->rx_state) {
296 
297                                 case RECV_WAIT_EVENT_HEADER:
298                                         eh = hci_event_hdr(info->rx_skb);
299                                         info->rx_state = RECV_WAIT_DATA;
300                                         info->rx_count = eh->plen;
301                                         break;
302 
303                                 case RECV_WAIT_ACL_HEADER:
304                                         ah = hci_acl_hdr(info->rx_skb);
305                                         dlen = __le16_to_cpu(ah->dlen);
306                                         info->rx_state = RECV_WAIT_DATA;
307                                         info->rx_count = dlen;
308                                         break;
309 
310                                 case RECV_WAIT_SCO_HEADER:
311                                         sh = hci_sco_hdr(info->rx_skb);
312                                         info->rx_state = RECV_WAIT_DATA;
313                                         info->rx_count = sh->dlen;
314                                         break;
315 
316                                 case RECV_WAIT_DATA:
317                                         hci_recv_frame(info->hdev, info->rx_skb);
318                                         info->rx_skb = NULL;
319                                         break;
320 
321                                 }
322 
323                         }
324 
325                 }
326 
327         }
328 
329         bt3c_io_write(iobase, 0x7006, 0x0000);
330 }
331 
332 
333 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
334 {
335         struct bt3c_info *info = dev_inst;
336         unsigned int iobase;
337         int iir;
338         irqreturn_t r = IRQ_NONE;
339 
340         if (!info || !info->hdev)
341                 /* our irq handler is shared */
342                 return IRQ_NONE;
343 
344         iobase = info->p_dev->resource[0]->start;
345 
346         spin_lock(&(info->lock));
347 
348         iir = inb(iobase + CONTROL);
349         if (iir & 0x80) {
350                 int stat = bt3c_read(iobase, 0x7001);
351 
352                 if ((stat & 0xff) == 0x7f) {
353                         BT_ERR("Very strange (stat=0x%04x)", stat);
354                 } else if ((stat & 0xff) != 0xff) {
355                         if (stat & 0x0020) {
356                                 int status = bt3c_read(iobase, 0x7002) & 0x10;
357                                 BT_INFO("%s: Antenna %s", info->hdev->name,
358                                                         status ? "out" : "in");
359                         }
360                         if (stat & 0x0001)
361                                 bt3c_receive(info);
362                         if (stat & 0x0002) {
363                                 clear_bit(XMIT_SENDING, &(info->tx_state));
364                                 bt3c_write_wakeup(info);
365                         }
366 
367                         bt3c_io_write(iobase, 0x7001, 0x0000);
368 
369                         outb(iir, iobase + CONTROL);
370                 }
371                 r = IRQ_HANDLED;
372         }
373 
374         spin_unlock(&(info->lock));
375 
376         return r;
377 }
378 
379 
380 
381 /* ======================== HCI interface ======================== */
382 
383 
384 static int bt3c_hci_flush(struct hci_dev *hdev)
385 {
386         struct bt3c_info *info = hci_get_drvdata(hdev);
387 
388         /* Drop TX queue */
389         skb_queue_purge(&(info->txq));
390 
391         return 0;
392 }
393 
394 
395 static int bt3c_hci_open(struct hci_dev *hdev)
396 {
397         return 0;
398 }
399 
400 
401 static int bt3c_hci_close(struct hci_dev *hdev)
402 {
403         bt3c_hci_flush(hdev);
404 
405         return 0;
406 }
407 
408 
409 static int bt3c_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
410 {
411         struct bt3c_info *info = hci_get_drvdata(hdev);
412         unsigned long flags;
413 
414         switch (bt_cb(skb)->pkt_type) {
415         case HCI_COMMAND_PKT:
416                 hdev->stat.cmd_tx++;
417                 break;
418         case HCI_ACLDATA_PKT:
419                 hdev->stat.acl_tx++;
420                 break;
421         case HCI_SCODATA_PKT:
422                 hdev->stat.sco_tx++;
423                 break;
424         }
425 
426         /* Prepend skb with frame type */
427         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
428         skb_queue_tail(&(info->txq), skb);
429 
430         spin_lock_irqsave(&(info->lock), flags);
431 
432         bt3c_write_wakeup(info);
433 
434         spin_unlock_irqrestore(&(info->lock), flags);
435 
436         return 0;
437 }
438 
439 
440 
441 /* ======================== Card services HCI interaction ======================== */
442 
443 
444 static int bt3c_load_firmware(struct bt3c_info *info,
445                               const unsigned char *firmware,
446                               int count)
447 {
448         char *ptr = (char *) firmware;
449         char b[9];
450         unsigned int iobase, tmp;
451         unsigned long size, addr, fcs;
452         int i, err = 0;
453 
454         iobase = info->p_dev->resource[0]->start;
455 
456         /* Reset */
457         bt3c_io_write(iobase, 0x8040, 0x0404);
458         bt3c_io_write(iobase, 0x8040, 0x0400);
459 
460         udelay(1);
461 
462         bt3c_io_write(iobase, 0x8040, 0x0404);
463 
464         udelay(17);
465 
466         /* Load */
467         while (count) {
468                 if (ptr[0] != 'S') {
469                         BT_ERR("Bad address in firmware");
470                         err = -EFAULT;
471                         goto error;
472                 }
473 
474                 memset(b, 0, sizeof(b));
475                 memcpy(b, ptr + 2, 2);
476                 if (kstrtoul(b, 16, &size) < 0)
477                         return -EINVAL;
478 
479                 memset(b, 0, sizeof(b));
480                 memcpy(b, ptr + 4, 8);
481                 if (kstrtoul(b, 16, &addr) < 0)
482                         return -EINVAL;
483 
484                 memset(b, 0, sizeof(b));
485                 memcpy(b, ptr + (size * 2) + 2, 2);
486                 if (kstrtoul(b, 16, &fcs) < 0)
487                         return -EINVAL;
488 
489                 memset(b, 0, sizeof(b));
490                 for (tmp = 0, i = 0; i < size; i++) {
491                         memcpy(b, ptr + (i * 2) + 2, 2);
492                         tmp += simple_strtol(b, NULL, 16);
493                 }
494 
495                 if (((tmp + fcs) & 0xff) != 0xff) {
496                         BT_ERR("Checksum error in firmware");
497                         err = -EILSEQ;
498                         goto error;
499                 }
500 
501                 if (ptr[1] == '3') {
502                         bt3c_address(iobase, addr);
503 
504                         memset(b, 0, sizeof(b));
505                         for (i = 0; i < (size - 4) / 2; i++) {
506                                 memcpy(b, ptr + (i * 4) + 12, 4);
507                                 tmp = simple_strtoul(b, NULL, 16);
508                                 bt3c_put(iobase, tmp);
509                         }
510                 }
511 
512                 ptr   += (size * 2) + 6;
513                 count -= (size * 2) + 6;
514         }
515 
516         udelay(17);
517 
518         /* Boot */
519         bt3c_address(iobase, 0x3000);
520         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
521 
522 error:
523         udelay(17);
524 
525         /* Clear */
526         bt3c_io_write(iobase, 0x7006, 0x0000);
527         bt3c_io_write(iobase, 0x7005, 0x0000);
528         bt3c_io_write(iobase, 0x7001, 0x0000);
529 
530         return err;
531 }
532 
533 
534 static int bt3c_open(struct bt3c_info *info)
535 {
536         const struct firmware *firmware;
537         struct hci_dev *hdev;
538         int err;
539 
540         spin_lock_init(&(info->lock));
541 
542         skb_queue_head_init(&(info->txq));
543 
544         info->rx_state = RECV_WAIT_PACKET_TYPE;
545         info->rx_count = 0;
546         info->rx_skb = NULL;
547 
548         /* Initialize HCI device */
549         hdev = hci_alloc_dev();
550         if (!hdev) {
551                 BT_ERR("Can't allocate HCI device");
552                 return -ENOMEM;
553         }
554 
555         info->hdev = hdev;
556 
557         hdev->bus = HCI_PCCARD;
558         hci_set_drvdata(hdev, info);
559         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
560 
561         hdev->open  = bt3c_hci_open;
562         hdev->close = bt3c_hci_close;
563         hdev->flush = bt3c_hci_flush;
564         hdev->send  = bt3c_hci_send_frame;
565 
566         /* Load firmware */
567         err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
568         if (err < 0) {
569                 BT_ERR("Firmware request failed");
570                 goto error;
571         }
572 
573         err = bt3c_load_firmware(info, firmware->data, firmware->size);
574 
575         release_firmware(firmware);
576 
577         if (err < 0) {
578                 BT_ERR("Firmware loading failed");
579                 goto error;
580         }
581 
582         /* Timeout before it is safe to send the first HCI packet */
583         msleep(1000);
584 
585         /* Register HCI device */
586         err = hci_register_dev(hdev);
587         if (err < 0) {
588                 BT_ERR("Can't register HCI device");
589                 goto error;
590         }
591 
592         return 0;
593 
594 error:
595         info->hdev = NULL;
596         hci_free_dev(hdev);
597         return err;
598 }
599 
600 
601 static int bt3c_close(struct bt3c_info *info)
602 {
603         struct hci_dev *hdev = info->hdev;
604 
605         if (!hdev)
606                 return -ENODEV;
607 
608         bt3c_hci_close(hdev);
609 
610         hci_unregister_dev(hdev);
611         hci_free_dev(hdev);
612 
613         return 0;
614 }
615 
616 static int bt3c_probe(struct pcmcia_device *link)
617 {
618         struct bt3c_info *info;
619 
620         /* Create new info device */
621         info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
622         if (!info)
623                 return -ENOMEM;
624 
625         info->p_dev = link;
626         link->priv = info;
627 
628         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
629                 CONF_AUTO_SET_IO;
630 
631         return bt3c_config(link);
632 }
633 
634 
635 static void bt3c_detach(struct pcmcia_device *link)
636 {
637         bt3c_release(link);
638 }
639 
640 static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
641 {
642         int *try = priv_data;
643 
644         if (!try)
645                 p_dev->io_lines = 16;
646 
647         if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
648                 return -EINVAL;
649 
650         p_dev->resource[0]->end = 8;
651         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
652         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
653 
654         return pcmcia_request_io(p_dev);
655 }
656 
657 static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
658                                       void *priv_data)
659 {
660         static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
661         int j;
662 
663         if (p_dev->io_lines > 3)
664                 return -ENODEV;
665 
666         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
667         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
668         p_dev->resource[0]->end = 8;
669 
670         for (j = 0; j < 5; j++) {
671                 p_dev->resource[0]->start = base[j];
672                 p_dev->io_lines = base[j] ? 16 : 3;
673                 if (!pcmcia_request_io(p_dev))
674                         return 0;
675         }
676         return -ENODEV;
677 }
678 
679 static int bt3c_config(struct pcmcia_device *link)
680 {
681         struct bt3c_info *info = link->priv;
682         int i;
683         unsigned long try;
684 
685         /* First pass: look for a config entry that looks normal.
686            Two tries: without IO aliases, then with aliases */
687         for (try = 0; try < 2; try++)
688                 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
689                         goto found_port;
690 
691         /* Second pass: try to find an entry that isn't picky about
692            its base address, then try to grab any standard serial port
693            address, and finally try to get any free port. */
694         if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
695                 goto found_port;
696 
697         BT_ERR("No usable port range found");
698         goto failed;
699 
700 found_port:
701         i = pcmcia_request_irq(link, &bt3c_interrupt);
702         if (i != 0)
703                 goto failed;
704 
705         i = pcmcia_enable_device(link);
706         if (i != 0)
707                 goto failed;
708 
709         if (bt3c_open(info) != 0)
710                 goto failed;
711 
712         return 0;
713 
714 failed:
715         bt3c_release(link);
716         return -ENODEV;
717 }
718 
719 
720 static void bt3c_release(struct pcmcia_device *link)
721 {
722         struct bt3c_info *info = link->priv;
723 
724         bt3c_close(info);
725 
726         pcmcia_disable_device(link);
727 }
728 
729 
730 static const struct pcmcia_device_id bt3c_ids[] = {
731         PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
732         PCMCIA_DEVICE_NULL
733 };
734 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
735 
736 static struct pcmcia_driver bt3c_driver = {
737         .owner          = THIS_MODULE,
738         .name           = "bt3c_cs",
739         .probe          = bt3c_probe,
740         .remove         = bt3c_detach,
741         .id_table       = bt3c_ids,
742 };
743 module_pcmcia_driver(bt3c_driver);
744 

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