3 * Driver for the 3Com Bluetooth PCMCIA card
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
6 * Jose Orlando Pereira <jop@di.uminho.pt>
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;
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.
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.
24 #include <linux/module.h>
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>
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>
44 #include <linux/device.h>
45 #include <linux/firmware.h>
47 #include <pcmcia/cistpl.h>
48 #include <pcmcia/ciscode.h>
49 #include <pcmcia/ds.h>
50 #include <pcmcia/cisreg.h>
52 #include <net/bluetooth/bluetooth.h>
53 #include <net/bluetooth/hci_core.h>
57 /* ======================== Module parameters ======================== */
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");
67 /* ======================== Local structures ======================== */
70 typedef struct bt3c_info_t
{
71 struct pcmcia_device
*p_dev
;
75 spinlock_t lock
; /* For serializing operations */
77 struct sk_buff_head txq
;
78 unsigned long tx_state
;
80 unsigned long rx_state
;
81 unsigned long rx_count
;
82 struct sk_buff
*rx_skb
;
86 static int bt3c_config(struct pcmcia_device
*link
);
87 static void bt3c_release(struct pcmcia_device
*link
);
89 static void bt3c_detach(struct pcmcia_device
*p_dev
);
93 #define XMIT_SENDING 1
95 #define XMIT_WAITING 8
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
106 /* ======================== Special I/O functions ======================== */
116 static inline void bt3c_address(unsigned int iobase
, unsigned short addr
)
118 outb(addr
& 0xff, iobase
+ ADDR_L
);
119 outb((addr
>> 8) & 0xff, iobase
+ ADDR_H
);
123 static inline void bt3c_put(unsigned int iobase
, unsigned short value
)
125 outb(value
& 0xff, iobase
+ DATA_L
);
126 outb((value
>> 8) & 0xff, iobase
+ DATA_H
);
130 static inline void bt3c_io_write(unsigned int iobase
, unsigned short addr
, unsigned short value
)
132 bt3c_address(iobase
, addr
);
133 bt3c_put(iobase
, value
);
137 static inline unsigned short bt3c_get(unsigned int iobase
)
139 unsigned short value
= inb(iobase
+ DATA_L
);
141 value
|= inb(iobase
+ DATA_H
) << 8;
147 static inline unsigned short bt3c_read(unsigned int iobase
, unsigned short addr
)
149 bt3c_address(iobase
, addr
);
151 return bt3c_get(iobase
);
156 /* ======================== Interrupt handling ======================== */
159 static int bt3c_write(unsigned int iobase
, int fifo_size
, __u8
*buf
, int len
)
163 bt3c_address(iobase
, 0x7080);
165 /* Fill FIFO with current frame */
166 while (actual
< len
) {
167 /* Transmit next byte */
168 bt3c_put(iobase
, buf
[actual
]);
172 bt3c_io_write(iobase
, 0x7005, actual
);
178 static void bt3c_write_wakeup(bt3c_info_t
*info
)
181 BT_ERR("Unknown device");
185 if (test_and_set_bit(XMIT_SENDING
, &(info
->tx_state
)))
189 unsigned int iobase
= info
->p_dev
->resource
[0]->start
;
190 register struct sk_buff
*skb
;
193 if (!pcmcia_dev_present(info
->p_dev
))
197 if (!(skb
= skb_dequeue(&(info
->txq
)))) {
198 clear_bit(XMIT_SENDING
, &(info
->tx_state
));
203 len
= bt3c_write(iobase
, 256, skb
->data
, skb
->len
);
205 if (len
!= skb
->len
) {
206 BT_ERR("Very strange");
211 info
->hdev
->stat
.byte_tx
+= len
;
217 static void bt3c_receive(bt3c_info_t
*info
)
223 BT_ERR("Unknown device");
227 iobase
= info
->p_dev
->resource
[0]->start
;
229 avail
= bt3c_read(iobase
, 0x7006);
230 //printk("bt3c_cs: receiving %d bytes\n", avail);
232 bt3c_address(iobase
, 0x7480);
233 while (size
< avail
) {
235 info
->hdev
->stat
.byte_rx
++;
237 /* Allocate packet */
238 if (info
->rx_skb
== NULL
) {
239 info
->rx_state
= RECV_WAIT_PACKET_TYPE
;
241 if (!(info
->rx_skb
= bt_skb_alloc(HCI_MAX_FRAME_SIZE
, GFP_ATOMIC
))) {
242 BT_ERR("Can't allocate mem for new packet");
248 if (info
->rx_state
== RECV_WAIT_PACKET_TYPE
) {
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);
255 switch (bt_cb(info
->rx_skb
)->pkt_type
) {
258 info
->rx_state
= RECV_WAIT_EVENT_HEADER
;
259 info
->rx_count
= HCI_EVENT_HDR_SIZE
;
262 case HCI_ACLDATA_PKT
:
263 info
->rx_state
= RECV_WAIT_ACL_HEADER
;
264 info
->rx_count
= HCI_ACL_HDR_SIZE
;
267 case HCI_SCODATA_PKT
:
268 info
->rx_state
= RECV_WAIT_SCO_HEADER
;
269 info
->rx_count
= HCI_SCO_HDR_SIZE
;
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
));
278 kfree_skb(info
->rx_skb
);
286 __u8 x
= inb(iobase
+ DATA_L
);
288 *skb_put(info
->rx_skb
, 1) = x
;
289 inb(iobase
+ DATA_H
);
292 if (info
->rx_count
== 0) {
295 struct hci_event_hdr
*eh
;
296 struct hci_acl_hdr
*ah
;
297 struct hci_sco_hdr
*sh
;
299 switch (info
->rx_state
) {
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
;
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
;
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
;
321 hci_recv_frame(info
->rx_skb
);
333 bt3c_io_write(iobase
, 0x7006, 0x0000);
337 static irqreturn_t
bt3c_interrupt(int irq
, void *dev_inst
)
339 bt3c_info_t
*info
= dev_inst
;
342 irqreturn_t r
= IRQ_NONE
;
344 if (!info
|| !info
->hdev
)
345 /* our irq handler is shared */
348 iobase
= info
->p_dev
->resource
[0]->start
;
350 spin_lock(&(info
->lock
));
352 iir
= inb(iobase
+ CONTROL
);
354 int stat
= bt3c_read(iobase
, 0x7001);
356 if ((stat
& 0xff) == 0x7f) {
357 BT_ERR("Very strange (stat=0x%04x)", stat
);
358 } else if ((stat
& 0xff) != 0xff) {
360 int status
= bt3c_read(iobase
, 0x7002) & 0x10;
361 BT_INFO("%s: Antenna %s", info
->hdev
->name
,
362 status
? "out" : "in");
367 //BT_ERR("Ack (stat=0x%04x)", stat);
368 clear_bit(XMIT_SENDING
, &(info
->tx_state
));
369 bt3c_write_wakeup(info
);
372 bt3c_io_write(iobase
, 0x7001, 0x0000);
374 outb(iir
, iobase
+ CONTROL
);
379 spin_unlock(&(info
->lock
));
386 /* ======================== HCI interface ======================== */
389 static int bt3c_hci_flush(struct hci_dev
*hdev
)
391 bt3c_info_t
*info
= hci_get_drvdata(hdev
);
394 skb_queue_purge(&(info
->txq
));
400 static int bt3c_hci_open(struct hci_dev
*hdev
)
402 set_bit(HCI_RUNNING
, &(hdev
->flags
));
408 static int bt3c_hci_close(struct hci_dev
*hdev
)
410 if (!test_and_clear_bit(HCI_RUNNING
, &(hdev
->flags
)))
413 bt3c_hci_flush(hdev
);
419 static int bt3c_hci_send_frame(struct sk_buff
*skb
)
422 struct hci_dev
*hdev
= (struct hci_dev
*)(skb
->dev
);
426 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
430 info
= hci_get_drvdata(hdev
);
432 switch (bt_cb(skb
)->pkt_type
) {
433 case HCI_COMMAND_PKT
:
436 case HCI_ACLDATA_PKT
:
439 case HCI_SCODATA_PKT
:
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
);
448 spin_lock_irqsave(&(info
->lock
), flags
);
450 bt3c_write_wakeup(info
);
452 spin_unlock_irqrestore(&(info
->lock
), flags
);
458 static int bt3c_hci_ioctl(struct hci_dev
*hdev
, unsigned int cmd
, unsigned long arg
)
465 /* ======================== Card services HCI interaction ======================== */
468 static int bt3c_load_firmware(bt3c_info_t
*info
, const unsigned char *firmware
,
471 char *ptr
= (char *) firmware
;
473 unsigned int iobase
, size
, addr
, fcs
, tmp
;
476 iobase
= info
->p_dev
->resource
[0]->start
;
479 bt3c_io_write(iobase
, 0x8040, 0x0404);
480 bt3c_io_write(iobase
, 0x8040, 0x0400);
484 bt3c_io_write(iobase
, 0x8040, 0x0404);
491 BT_ERR("Bad address in firmware");
496 memset(b
, 0, sizeof(b
));
497 memcpy(b
, ptr
+ 2, 2);
498 size
= simple_strtoul(b
, NULL
, 16);
500 memset(b
, 0, sizeof(b
));
501 memcpy(b
, ptr
+ 4, 8);
502 addr
= simple_strtoul(b
, NULL
, 16);
504 memset(b
, 0, sizeof(b
));
505 memcpy(b
, ptr
+ (size
* 2) + 2, 2);
506 fcs
= simple_strtoul(b
, NULL
, 16);
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);
514 if (((tmp
+ fcs
) & 0xff) != 0xff) {
515 BT_ERR("Checksum error in firmware");
521 bt3c_address(iobase
, addr
);
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
);
531 ptr
+= (size
* 2) + 6;
532 count
-= (size
* 2) + 6;
538 bt3c_address(iobase
, 0x3000);
539 outb(inb(iobase
+ CONTROL
) | 0x40, iobase
+ CONTROL
);
545 bt3c_io_write(iobase
, 0x7006, 0x0000);
546 bt3c_io_write(iobase
, 0x7005, 0x0000);
547 bt3c_io_write(iobase
, 0x7001, 0x0000);
553 static int bt3c_open(bt3c_info_t
*info
)
555 const struct firmware
*firmware
;
556 struct hci_dev
*hdev
;
559 spin_lock_init(&(info
->lock
));
561 skb_queue_head_init(&(info
->txq
));
563 info
->rx_state
= RECV_WAIT_PACKET_TYPE
;
567 /* Initialize HCI device */
568 hdev
= hci_alloc_dev();
570 BT_ERR("Can't allocate HCI device");
576 hdev
->bus
= HCI_PCCARD
;
577 hci_set_drvdata(hdev
, info
);
578 SET_HCIDEV_DEV(hdev
, &info
->p_dev
->dev
);
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
;
587 err
= request_firmware(&firmware
, "BT3CPCC.bin", &info
->p_dev
->dev
);
589 BT_ERR("Firmware request failed");
593 err
= bt3c_load_firmware(info
, firmware
->data
, firmware
->size
);
595 release_firmware(firmware
);
598 BT_ERR("Firmware loading failed");
602 /* Timeout before it is safe to send the first HCI packet */
605 /* Register HCI device */
606 err
= hci_register_dev(hdev
);
608 BT_ERR("Can't register HCI device");
621 static int bt3c_close(bt3c_info_t
*info
)
623 struct hci_dev
*hdev
= info
->hdev
;
628 bt3c_hci_close(hdev
);
630 hci_unregister_dev(hdev
);
636 static int bt3c_probe(struct pcmcia_device
*link
)
640 /* Create new info device */
641 info
= devm_kzalloc(&link
->dev
, sizeof(*info
), GFP_KERNEL
);
648 link
->config_flags
|= CONF_ENABLE_IRQ
| CONF_AUTO_SET_VPP
|
651 return bt3c_config(link
);
655 static void bt3c_detach(struct pcmcia_device
*link
)
660 static int bt3c_check_config(struct pcmcia_device
*p_dev
, void *priv_data
)
662 int *try = priv_data
;
665 p_dev
->io_lines
= 16;
667 if ((p_dev
->resource
[0]->end
!= 8) || (p_dev
->resource
[0]->start
== 0))
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
;
674 return pcmcia_request_io(p_dev
);
677 static int bt3c_check_config_notpicky(struct pcmcia_device
*p_dev
,
680 static unsigned int base
[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
683 if (p_dev
->io_lines
> 3)
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;
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
))
699 static int bt3c_config(struct pcmcia_device
*link
)
701 bt3c_info_t
*info
= link
->priv
;
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))
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
))
717 BT_ERR("No usable port range found");
721 i
= pcmcia_request_irq(link
, &bt3c_interrupt
);
725 i
= pcmcia_enable_device(link
);
729 if (bt3c_open(info
) != 0)
740 static void bt3c_release(struct pcmcia_device
*link
)
742 bt3c_info_t
*info
= link
->priv
;
746 pcmcia_disable_device(link
);
750 static const struct pcmcia_device_id bt3c_ids
[] = {
751 PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
754 MODULE_DEVICE_TABLE(pcmcia
, bt3c_ids
);
756 static struct pcmcia_driver bt3c_driver
= {
757 .owner
= THIS_MODULE
,
760 .remove
= bt3c_detach
,
761 .id_table
= bt3c_ids
,
763 module_pcmcia_driver(bt3c_driver
);