3 * Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
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;
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.
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.
23 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/types.h>
29 #include <linux/sched.h>
30 #include <linux/delay.h>
31 #include <linux/timer.h>
32 #include <linux/errno.h>
33 #include <linux/ptrace.h>
34 #include <linux/ioport.h>
35 #include <linux/spinlock.h>
36 #include <linux/moduleparam.h>
37 #include <linux/wait.h>
39 #include <linux/skbuff.h>
42 #include <pcmcia/cistpl.h>
43 #include <pcmcia/ciscode.h>
44 #include <pcmcia/ds.h>
45 #include <pcmcia/cisreg.h>
47 #include <net/bluetooth/bluetooth.h>
48 #include <net/bluetooth/hci_core.h>
52 /* ======================== Module parameters ======================== */
55 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
56 MODULE_DESCRIPTION("Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)");
57 MODULE_LICENSE("GPL");
61 /* ======================== Local structures ======================== */
64 typedef struct bluecard_info_t {
65 struct pcmcia_device *p_dev;
69 spinlock_t lock; /* For serializing operations */
70 struct timer_list timer; /* For LED control */
72 struct sk_buff_head txq;
73 unsigned long tx_state;
75 unsigned long rx_state;
76 unsigned long rx_count;
77 struct sk_buff *rx_skb;
79 unsigned char ctrl_reg;
80 unsigned long hw_state; /* Status of the hardware and LED control */
84 static int bluecard_config(struct pcmcia_device *link);
85 static void bluecard_release(struct pcmcia_device *link);
87 static void bluecard_detach(struct pcmcia_device *p_dev);
90 /* Default baud rate: 57600, 115200, 230400 or 460800 */
91 #define DEFAULT_BAUD_RATE 230400
96 #define CARD_HAS_PCCARD_ID 4
97 #define CARD_HAS_POWER_LED 5
98 #define CARD_HAS_ACTIVITY_LED 6
100 /* Transmit states */
101 #define XMIT_SENDING 1
102 #define XMIT_WAKEUP 2
103 #define XMIT_BUFFER_NUMBER 5 /* unset = buffer one, set = buffer two */
104 #define XMIT_BUF_ONE_READY 6
105 #define XMIT_BUF_TWO_READY 7
106 #define XMIT_SENDING_READY 8
108 /* Receiver states */
109 #define RECV_WAIT_PACKET_TYPE 0
110 #define RECV_WAIT_EVENT_HEADER 1
111 #define RECV_WAIT_ACL_HEADER 2
112 #define RECV_WAIT_SCO_HEADER 3
113 #define RECV_WAIT_DATA 4
115 /* Special packet types */
116 #define PKT_BAUD_RATE_57600 0x80
117 #define PKT_BAUD_RATE_115200 0x81
118 #define PKT_BAUD_RATE_230400 0x82
119 #define PKT_BAUD_RATE_460800 0x83
122 /* These are the register offsets */
123 #define REG_COMMAND 0x20
124 #define REG_INTERRUPT 0x21
125 #define REG_CONTROL 0x22
126 #define REG_RX_CONTROL 0x24
127 #define REG_CARD_RESET 0x30
128 #define REG_LED_CTRL 0x30
131 #define REG_COMMAND_TX_BUF_ONE 0x01
132 #define REG_COMMAND_TX_BUF_TWO 0x02
133 #define REG_COMMAND_RX_BUF_ONE 0x04
134 #define REG_COMMAND_RX_BUF_TWO 0x08
135 #define REG_COMMAND_RX_WIN_ONE 0x00
136 #define REG_COMMAND_RX_WIN_TWO 0x10
139 #define REG_CONTROL_BAUD_RATE_57600 0x00
140 #define REG_CONTROL_BAUD_RATE_115200 0x01
141 #define REG_CONTROL_BAUD_RATE_230400 0x02
142 #define REG_CONTROL_BAUD_RATE_460800 0x03
143 #define REG_CONTROL_RTS 0x04
144 #define REG_CONTROL_BT_ON 0x08
145 #define REG_CONTROL_BT_RESET 0x10
146 #define REG_CONTROL_BT_RES_PU 0x20
147 #define REG_CONTROL_INTERRUPT 0x40
148 #define REG_CONTROL_CARD_RESET 0x80
151 #define RTS_LEVEL_SHIFT_BITS 0x02
155 /* ======================== LED handling routines ======================== */
158 static void bluecard_activity_led_timeout(u_long arg)
160 bluecard_info_t *info = (bluecard_info_t *)arg;
161 unsigned int iobase = info->p_dev->resource[0]->start;
163 if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
166 if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
167 /* Disable activity LED */
168 outb(0x08 | 0x20, iobase + 0x30);
170 /* Disable power LED */
171 outb(0x00, iobase + 0x30);
176 static void bluecard_enable_activity_led(bluecard_info_t *info)
178 unsigned int iobase = info->p_dev->resource[0]->start;
180 if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
183 if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
184 /* Enable activity LED */
185 outb(0x10 | 0x40, iobase + 0x30);
187 /* Stop the LED after HZ/4 */
188 mod_timer(&(info->timer), jiffies + HZ / 4);
190 /* Enable power LED */
191 outb(0x08 | 0x20, iobase + 0x30);
193 /* Stop the LED after HZ/2 */
194 mod_timer(&(info->timer), jiffies + HZ / 2);
200 /* ======================== Interrupt handling ======================== */
203 static int bluecard_write(unsigned int iobase, unsigned int offset, __u8 *buf, int len)
207 actual = (len > 15) ? 15 : len;
209 outb_p(actual, iobase + offset);
211 for (i = 0; i < actual; i++)
212 outb_p(buf[i], iobase + offset + i + 1);
218 static void bluecard_write_wakeup(bluecard_info_t *info)
221 BT_ERR("Unknown device");
225 if (!test_bit(XMIT_SENDING_READY, &(info->tx_state)))
228 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
229 set_bit(XMIT_WAKEUP, &(info->tx_state));
234 unsigned int iobase = info->p_dev->resource[0]->start;
236 unsigned char command;
237 unsigned long ready_bit;
238 register struct sk_buff *skb;
241 clear_bit(XMIT_WAKEUP, &(info->tx_state));
243 if (!pcmcia_dev_present(info->p_dev))
246 if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) {
247 if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state)))
250 command = REG_COMMAND_TX_BUF_TWO;
251 ready_bit = XMIT_BUF_TWO_READY;
253 if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state)))
256 command = REG_COMMAND_TX_BUF_ONE;
257 ready_bit = XMIT_BUF_ONE_READY;
260 if (!(skb = skb_dequeue(&(info->txq))))
263 if (bt_cb(skb)->pkt_type & 0x80) {
265 info->ctrl_reg |= REG_CONTROL_RTS;
266 outb(info->ctrl_reg, iobase + REG_CONTROL);
270 bluecard_enable_activity_led(info);
273 len = bluecard_write(iobase, offset, skb->data, skb->len);
275 /* Tell the FPGA to send the data */
276 outb_p(command, iobase + REG_COMMAND);
278 /* Mark the buffer as dirty */
279 clear_bit(ready_bit, &(info->tx_state));
281 if (bt_cb(skb)->pkt_type & 0x80) {
282 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
285 unsigned char baud_reg;
287 switch (bt_cb(skb)->pkt_type) {
288 case PKT_BAUD_RATE_460800:
289 baud_reg = REG_CONTROL_BAUD_RATE_460800;
291 case PKT_BAUD_RATE_230400:
292 baud_reg = REG_CONTROL_BAUD_RATE_230400;
294 case PKT_BAUD_RATE_115200:
295 baud_reg = REG_CONTROL_BAUD_RATE_115200;
297 case PKT_BAUD_RATE_57600:
298 /* Fall through... */
300 baud_reg = REG_CONTROL_BAUD_RATE_57600;
304 /* Wait until the command reaches the baseband */
305 prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
306 schedule_timeout(HZ/10);
307 finish_wait(&wq, &wait);
309 /* Set baud on baseband */
310 info->ctrl_reg &= ~0x03;
311 info->ctrl_reg |= baud_reg;
312 outb(info->ctrl_reg, iobase + REG_CONTROL);
315 info->ctrl_reg &= ~REG_CONTROL_RTS;
316 outb(info->ctrl_reg, iobase + REG_CONTROL);
318 /* Wait before the next HCI packet can be send */
319 prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
320 schedule_timeout(HZ);
321 finish_wait(&wq, &wait);
324 if (len == skb->len) {
328 skb_queue_head(&(info->txq), skb);
331 info->hdev->stat.byte_tx += len;
334 change_bit(XMIT_BUFFER_NUMBER, &(info->tx_state));
336 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
338 clear_bit(XMIT_SENDING, &(info->tx_state));
342 static int bluecard_read(unsigned int iobase, unsigned int offset, __u8 *buf, int size)
346 outb(REG_COMMAND_RX_WIN_ONE, iobase + REG_COMMAND);
348 len = inb(iobase + offset);
355 outb(REG_COMMAND_RX_WIN_TWO, iobase + REG_COMMAND);
359 buf[n] = inb(iobase + offset + i);
370 static void bluecard_receive(bluecard_info_t *info, unsigned int offset)
373 unsigned char buf[31];
377 BT_ERR("Unknown device");
381 iobase = info->p_dev->resource[0]->start;
383 if (test_bit(XMIT_SENDING_READY, &(info->tx_state)))
384 bluecard_enable_activity_led(info);
386 len = bluecard_read(iobase, offset, buf, sizeof(buf));
388 for (i = 0; i < len; i++) {
390 /* Allocate packet */
391 if (info->rx_skb == NULL) {
392 info->rx_state = RECV_WAIT_PACKET_TYPE;
394 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
395 BT_ERR("Can't allocate mem for new packet");
400 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
402 bt_cb(info->rx_skb)->pkt_type = buf[i];
404 switch (bt_cb(info->rx_skb)->pkt_type) {
408 if (offset != 0x00) {
409 set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
410 set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
411 set_bit(XMIT_SENDING_READY, &(info->tx_state));
412 bluecard_write_wakeup(info);
415 kfree_skb(info->rx_skb);
420 info->rx_state = RECV_WAIT_EVENT_HEADER;
421 info->rx_count = HCI_EVENT_HDR_SIZE;
424 case HCI_ACLDATA_PKT:
425 info->rx_state = RECV_WAIT_ACL_HEADER;
426 info->rx_count = HCI_ACL_HDR_SIZE;
429 case HCI_SCODATA_PKT:
430 info->rx_state = RECV_WAIT_SCO_HEADER;
431 info->rx_count = HCI_SCO_HDR_SIZE;
436 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
437 info->hdev->stat.err_rx++;
439 kfree_skb(info->rx_skb);
447 *skb_put(info->rx_skb, 1) = buf[i];
450 if (info->rx_count == 0) {
453 struct hci_event_hdr *eh;
454 struct hci_acl_hdr *ah;
455 struct hci_sco_hdr *sh;
457 switch (info->rx_state) {
459 case RECV_WAIT_EVENT_HEADER:
460 eh = hci_event_hdr(info->rx_skb);
461 info->rx_state = RECV_WAIT_DATA;
462 info->rx_count = eh->plen;
465 case RECV_WAIT_ACL_HEADER:
466 ah = hci_acl_hdr(info->rx_skb);
467 dlen = __le16_to_cpu(ah->dlen);
468 info->rx_state = RECV_WAIT_DATA;
469 info->rx_count = dlen;
472 case RECV_WAIT_SCO_HEADER:
473 sh = hci_sco_hdr(info->rx_skb);
474 info->rx_state = RECV_WAIT_DATA;
475 info->rx_count = sh->dlen;
479 hci_recv_frame(info->hdev, info->rx_skb);
492 info->hdev->stat.byte_rx += len;
496 static irqreturn_t bluecard_interrupt(int irq, void *dev_inst)
498 bluecard_info_t *info = dev_inst;
502 if (!info || !info->hdev)
503 /* our irq handler is shared */
506 if (!test_bit(CARD_READY, &(info->hw_state)))
509 iobase = info->p_dev->resource[0]->start;
511 spin_lock(&(info->lock));
513 /* Disable interrupt */
514 info->ctrl_reg &= ~REG_CONTROL_INTERRUPT;
515 outb(info->ctrl_reg, iobase + REG_CONTROL);
517 reg = inb(iobase + REG_INTERRUPT);
519 if ((reg != 0x00) && (reg != 0xff)) {
522 bluecard_receive(info, 0x00);
523 outb(0x04, iobase + REG_INTERRUPT);
524 outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
528 bluecard_receive(info, 0x10);
529 outb(0x08, iobase + REG_INTERRUPT);
530 outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
534 set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
535 outb(0x01, iobase + REG_INTERRUPT);
536 bluecard_write_wakeup(info);
540 set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
541 outb(0x02, iobase + REG_INTERRUPT);
542 bluecard_write_wakeup(info);
547 /* Enable interrupt */
548 info->ctrl_reg |= REG_CONTROL_INTERRUPT;
549 outb(info->ctrl_reg, iobase + REG_CONTROL);
551 spin_unlock(&(info->lock));
558 /* ======================== Device specific HCI commands ======================== */
561 static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
563 bluecard_info_t *info = hci_get_drvdata(hdev);
566 /* Ericsson baud rate command */
567 unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };
569 if (!(skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
570 BT_ERR("Can't allocate mem for new packet");
577 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_460800;
581 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_230400;
585 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_115200;
588 /* Fall through... */
591 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_57600;
595 memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
597 skb_queue_tail(&(info->txq), skb);
599 bluecard_write_wakeup(info);
606 /* ======================== HCI interface ======================== */
609 static int bluecard_hci_flush(struct hci_dev *hdev)
611 bluecard_info_t *info = hci_get_drvdata(hdev);
614 skb_queue_purge(&(info->txq));
620 static int bluecard_hci_open(struct hci_dev *hdev)
622 bluecard_info_t *info = hci_get_drvdata(hdev);
624 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
625 bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);
627 if (test_and_set_bit(HCI_RUNNING, &(hdev->flags)))
630 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
631 unsigned int iobase = info->p_dev->resource[0]->start;
634 outb(0x08 | 0x20, iobase + 0x30);
641 static int bluecard_hci_close(struct hci_dev *hdev)
643 bluecard_info_t *info = hci_get_drvdata(hdev);
645 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
648 bluecard_hci_flush(hdev);
650 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
651 unsigned int iobase = info->p_dev->resource[0]->start;
654 outb(0x00, iobase + 0x30);
661 static int bluecard_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
663 bluecard_info_t *info;
666 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
670 info = hci_get_drvdata(hdev);
672 switch (bt_cb(skb)->pkt_type) {
673 case HCI_COMMAND_PKT:
676 case HCI_ACLDATA_PKT:
679 case HCI_SCODATA_PKT:
684 /* Prepend skb with frame type */
685 memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
686 skb_queue_tail(&(info->txq), skb);
688 bluecard_write_wakeup(info);
695 /* ======================== Card services HCI interaction ======================== */
698 static int bluecard_open(bluecard_info_t *info)
700 unsigned int iobase = info->p_dev->resource[0]->start;
701 struct hci_dev *hdev;
704 spin_lock_init(&(info->lock));
706 init_timer(&(info->timer));
707 info->timer.function = &bluecard_activity_led_timeout;
708 info->timer.data = (u_long)info;
710 skb_queue_head_init(&(info->txq));
712 info->rx_state = RECV_WAIT_PACKET_TYPE;
716 /* Initialize HCI device */
717 hdev = hci_alloc_dev();
719 BT_ERR("Can't allocate HCI device");
725 hdev->bus = HCI_PCCARD;
726 hci_set_drvdata(hdev, info);
727 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
729 hdev->open = bluecard_hci_open;
730 hdev->close = bluecard_hci_close;
731 hdev->flush = bluecard_hci_flush;
732 hdev->send = bluecard_hci_send_frame;
734 id = inb(iobase + 0x30);
736 if ((id & 0x0f) == 0x02)
737 set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state));
740 set_bit(CARD_HAS_POWER_LED, &(info->hw_state));
743 set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state));
746 info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
747 outb(info->ctrl_reg, iobase + REG_CONTROL);
750 outb(0x80, iobase + 0x30);
756 outb(0x00, iobase + 0x30);
759 info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU;
760 outb(info->ctrl_reg, iobase + REG_CONTROL);
762 /* Enable interrupt */
763 outb(0xff, iobase + REG_INTERRUPT);
764 info->ctrl_reg |= REG_CONTROL_INTERRUPT;
765 outb(info->ctrl_reg, iobase + REG_CONTROL);
767 if ((id & 0x0f) == 0x03) {
769 info->ctrl_reg |= REG_CONTROL_RTS;
770 outb(info->ctrl_reg, iobase + REG_CONTROL);
773 info->ctrl_reg |= 0x03;
774 outb(info->ctrl_reg, iobase + REG_CONTROL);
777 info->ctrl_reg &= ~REG_CONTROL_RTS;
778 outb(info->ctrl_reg, iobase + REG_CONTROL);
780 set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
781 set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
782 set_bit(XMIT_SENDING_READY, &(info->tx_state));
785 /* Start the RX buffers */
786 outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
787 outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
789 /* Signal that the hardware is ready */
790 set_bit(CARD_READY, &(info->hw_state));
793 skb_queue_purge(&(info->txq));
795 /* Control the point at which RTS is enabled */
796 outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL);
798 /* Timeout before it is safe to send the first HCI packet */
801 /* Register HCI device */
802 if (hci_register_dev(hdev) < 0) {
803 BT_ERR("Can't register HCI device");
813 static int bluecard_close(bluecard_info_t *info)
815 unsigned int iobase = info->p_dev->resource[0]->start;
816 struct hci_dev *hdev = info->hdev;
821 bluecard_hci_close(hdev);
823 clear_bit(CARD_READY, &(info->hw_state));
826 info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
827 outb(info->ctrl_reg, iobase + REG_CONTROL);
830 outb(0x80, iobase + 0x30);
832 hci_unregister_dev(hdev);
838 static int bluecard_probe(struct pcmcia_device *link)
840 bluecard_info_t *info;
842 /* Create new info device */
843 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
850 link->config_flags |= CONF_ENABLE_IRQ;
852 return bluecard_config(link);
856 static void bluecard_detach(struct pcmcia_device *link)
858 bluecard_release(link);
862 static int bluecard_config(struct pcmcia_device *link)
864 bluecard_info_t *info = link->priv;
867 link->config_index = 0x20;
869 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
870 link->resource[0]->end = 64;
873 for (n = 0; n < 0x400; n += 0x40) {
874 link->resource[0]->start = n ^ 0x300;
875 i = pcmcia_request_io(link);
883 i = pcmcia_request_irq(link, bluecard_interrupt);
887 i = pcmcia_enable_device(link);
891 if (bluecard_open(info) != 0)
897 bluecard_release(link);
902 static void bluecard_release(struct pcmcia_device *link)
904 bluecard_info_t *info = link->priv;
906 bluecard_close(info);
908 del_timer(&(info->timer));
910 pcmcia_disable_device(link);
913 static const struct pcmcia_device_id bluecard_ids[] = {
914 PCMCIA_DEVICE_PROD_ID12("BlueCard", "LSE041", 0xbaf16fbf, 0x657cc15e),
915 PCMCIA_DEVICE_PROD_ID12("BTCFCARD", "LSE139", 0xe3987764, 0x2524b59c),
916 PCMCIA_DEVICE_PROD_ID12("WSS", "LSE039", 0x0a0736ec, 0x24e6dfab),
919 MODULE_DEVICE_TABLE(pcmcia, bluecard_ids);
921 static struct pcmcia_driver bluecard_driver = {
922 .owner = THIS_MODULE,
923 .name = "bluecard_cs",
924 .probe = bluecard_probe,
925 .remove = bluecard_detach,
926 .id_table = bluecard_ids,
928 module_pcmcia_driver(bluecard_driver);