3 * A driver for Nokia Connectivity Card DTL-1 devices
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/delay.h>
30 #include <linux/errno.h>
31 #include <linux/ptrace.h>
32 #include <linux/ioport.h>
33 #include <linux/spinlock.h>
34 #include <linux/moduleparam.h>
36 #include <linux/skbuff.h>
37 #include <linux/string.h>
38 #include <linux/serial.h>
39 #include <linux/serial_reg.h>
40 #include <linux/bitops.h>
41 #include <asm/system.h>
44 #include <pcmcia/cistpl.h>
45 #include <pcmcia/ciscode.h>
46 #include <pcmcia/ds.h>
47 #include <pcmcia/cisreg.h>
49 #include <net/bluetooth/bluetooth.h>
50 #include <net/bluetooth/hci_core.h>
54 /* ======================== Module parameters ======================== */
57 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
58 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
59 MODULE_LICENSE("GPL");
63 /* ======================== Local structures ======================== */
66 typedef struct dtl1_info_t {
67 struct pcmcia_device *p_dev;
71 spinlock_t lock; /* For serializing operations */
73 unsigned long flowmask; /* HCI flow mask */
76 struct sk_buff_head txq;
77 unsigned long tx_state;
79 unsigned long rx_state;
80 unsigned long rx_count;
81 struct sk_buff *rx_skb;
85 static int dtl1_config(struct pcmcia_device *link);
89 #define XMIT_SENDING 1
91 #define XMIT_WAITING 8
94 #define RECV_WAIT_NSH 0
95 #define RECV_WAIT_DATA 1
102 } __packed nsh_t; /* Nokia Specific Header */
104 #define NSHL 4 /* Nokia Specific Header Length */
108 /* ======================== Interrupt handling ======================== */
111 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
115 /* Tx FIFO should be empty */
116 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
119 /* Fill FIFO with current frame */
120 while ((fifo_size-- > 0) && (actual < len)) {
121 /* Transmit next byte */
122 outb(buf[actual], iobase + UART_TX);
130 static void dtl1_write_wakeup(dtl1_info_t *info)
133 BT_ERR("Unknown device");
137 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
138 set_bit(XMIT_WAKEUP, &(info->tx_state));
142 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
143 set_bit(XMIT_WAKEUP, &(info->tx_state));
148 register unsigned int iobase = info->p_dev->resource[0]->start;
149 register struct sk_buff *skb;
152 clear_bit(XMIT_WAKEUP, &(info->tx_state));
154 if (!pcmcia_dev_present(info->p_dev))
157 if (!(skb = skb_dequeue(&(info->txq))))
161 len = dtl1_write(iobase, 32, skb->data, skb->len);
163 if (len == skb->len) {
164 set_bit(XMIT_WAITING, &(info->tx_state));
168 skb_queue_head(&(info->txq), skb);
171 info->hdev->stat.byte_tx += len;
173 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
175 clear_bit(XMIT_SENDING, &(info->tx_state));
179 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
181 u8 flowmask = *(u8 *)skb->data;
184 printk(KERN_INFO "Bluetooth: Nokia control data =");
185 for (i = 0; i < skb->len; i++) {
186 printk(" %02x", skb->data[i]);
190 /* transition to active state */
191 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
192 clear_bit(XMIT_WAITING, &(info->tx_state));
193 dtl1_write_wakeup(info);
196 info->flowmask = flowmask;
202 static void dtl1_receive(dtl1_info_t *info)
209 BT_ERR("Unknown device");
213 iobase = info->p_dev->resource[0]->start;
216 info->hdev->stat.byte_rx++;
218 /* Allocate packet */
219 if (info->rx_skb == NULL)
220 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
221 BT_ERR("Can't allocate mem for new packet");
222 info->rx_state = RECV_WAIT_NSH;
223 info->rx_count = NSHL;
227 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
228 nsh = (nsh_t *)info->rx_skb->data;
232 if (info->rx_count == 0) {
234 switch (info->rx_state) {
236 info->rx_state = RECV_WAIT_DATA;
237 info->rx_count = nsh->len + (nsh->len & 0x0001);
240 bt_cb(info->rx_skb)->pkt_type = nsh->type;
242 /* remove PAD byte if it exists */
243 if (nsh->len & 0x0001) {
244 info->rx_skb->tail--;
249 skb_pull(info->rx_skb, NSHL);
251 switch (bt_cb(info->rx_skb)->pkt_type) {
253 /* control data for the Nokia Card */
254 dtl1_control(info, info->rx_skb);
259 /* send frame to the HCI layer */
260 info->rx_skb->dev = (void *) info->hdev;
261 bt_cb(info->rx_skb)->pkt_type &= 0x0f;
262 hci_recv_frame(info->rx_skb);
266 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
267 kfree_skb(info->rx_skb);
271 info->rx_state = RECV_WAIT_NSH;
272 info->rx_count = NSHL;
279 /* Make sure we don't stay here too long */
280 if (boguscount++ > 32)
283 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
287 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
289 dtl1_info_t *info = dev_inst;
294 irqreturn_t r = IRQ_NONE;
296 if (!info || !info->hdev)
297 /* our irq handler is shared */
300 iobase = info->p_dev->resource[0]->start;
302 spin_lock(&(info->lock));
304 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
308 /* Clear interrupt */
309 lsr = inb(iobase + UART_LSR);
316 /* Receive interrupt */
320 if (lsr & UART_LSR_THRE) {
321 /* Transmitter ready for data */
322 dtl1_write_wakeup(info);
326 BT_ERR("Unhandled IIR=%#x", iir);
330 /* Make sure we don't stay here too long */
331 if (boguscount++ > 100)
334 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
338 msr = inb(iobase + UART_MSR);
340 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
341 info->ri_latch = msr & UART_MSR_RI;
342 clear_bit(XMIT_WAITING, &(info->tx_state));
343 dtl1_write_wakeup(info);
347 spin_unlock(&(info->lock));
354 /* ======================== HCI interface ======================== */
357 static int dtl1_hci_open(struct hci_dev *hdev)
359 set_bit(HCI_RUNNING, &(hdev->flags));
365 static int dtl1_hci_flush(struct hci_dev *hdev)
367 dtl1_info_t *info = hci_get_drvdata(hdev);
370 skb_queue_purge(&(info->txq));
376 static int dtl1_hci_close(struct hci_dev *hdev)
378 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
381 dtl1_hci_flush(hdev);
387 static int dtl1_hci_send_frame(struct sk_buff *skb)
390 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
395 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
399 info = hci_get_drvdata(hdev);
401 switch (bt_cb(skb)->pkt_type) {
402 case HCI_COMMAND_PKT:
406 case HCI_ACLDATA_PKT:
410 case HCI_SCODATA_PKT:
421 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
425 skb_reserve(s, NSHL);
426 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
427 if (skb->len & 0x0001)
428 *skb_put(s, 1) = 0; /* PAD */
430 /* Prepend skb with Nokia frame header and queue */
431 memcpy(skb_push(s, NSHL), &nsh, NSHL);
432 skb_queue_tail(&(info->txq), s);
434 dtl1_write_wakeup(info);
442 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
449 /* ======================== Card services HCI interaction ======================== */
452 static int dtl1_open(dtl1_info_t *info)
455 unsigned int iobase = info->p_dev->resource[0]->start;
456 struct hci_dev *hdev;
458 spin_lock_init(&(info->lock));
460 skb_queue_head_init(&(info->txq));
462 info->rx_state = RECV_WAIT_NSH;
463 info->rx_count = NSHL;
466 set_bit(XMIT_WAITING, &(info->tx_state));
468 /* Initialize HCI device */
469 hdev = hci_alloc_dev();
471 BT_ERR("Can't allocate HCI device");
477 hdev->bus = HCI_PCCARD;
478 hci_set_drvdata(hdev, info);
479 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
481 hdev->open = dtl1_hci_open;
482 hdev->close = dtl1_hci_close;
483 hdev->flush = dtl1_hci_flush;
484 hdev->send = dtl1_hci_send_frame;
485 hdev->ioctl = dtl1_hci_ioctl;
487 spin_lock_irqsave(&(info->lock), flags);
490 outb(0, iobase + UART_MCR);
492 /* Turn off interrupts */
493 outb(0, iobase + UART_IER);
495 /* Initialize UART */
496 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
497 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
499 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
502 /* Turn on interrupts */
503 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
505 spin_unlock_irqrestore(&(info->lock), flags);
507 /* Timeout before it is safe to send the first HCI packet */
510 /* Register HCI device */
511 if (hci_register_dev(hdev) < 0) {
512 BT_ERR("Can't register HCI device");
522 static int dtl1_close(dtl1_info_t *info)
525 unsigned int iobase = info->p_dev->resource[0]->start;
526 struct hci_dev *hdev = info->hdev;
531 dtl1_hci_close(hdev);
533 spin_lock_irqsave(&(info->lock), flags);
536 outb(0, iobase + UART_MCR);
538 /* Turn off interrupts */
539 outb(0, iobase + UART_IER);
541 spin_unlock_irqrestore(&(info->lock), flags);
543 hci_unregister_dev(hdev);
549 static int dtl1_probe(struct pcmcia_device *link)
553 /* Create new info device */
554 info = kzalloc(sizeof(*info), GFP_KERNEL);
561 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
563 return dtl1_config(link);
567 static void dtl1_detach(struct pcmcia_device *link)
569 dtl1_info_t *info = link->priv;
572 pcmcia_disable_device(link);
576 static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
578 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
581 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
582 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
584 return pcmcia_request_io(p_dev);
587 static int dtl1_config(struct pcmcia_device *link)
589 dtl1_info_t *info = link->priv;
592 /* Look for a generic full-sized window */
593 link->resource[0]->end = 8;
594 if (pcmcia_loop_config(link, dtl1_confcheck, NULL) < 0)
597 i = pcmcia_request_irq(link, dtl1_interrupt);
601 i = pcmcia_enable_device(link);
605 if (dtl1_open(info) != 0)
615 static const struct pcmcia_device_id dtl1_ids[] = {
616 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
617 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
618 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
619 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
622 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
624 static struct pcmcia_driver dtl1_driver = {
625 .owner = THIS_MODULE,
628 .remove = dtl1_detach,
629 .id_table = dtl1_ids,
632 static int __init init_dtl1_cs(void)
634 return pcmcia_register_driver(&dtl1_driver);
638 static void __exit exit_dtl1_cs(void)
640 pcmcia_unregister_driver(&dtl1_driver);
643 module_init(init_dtl1_cs);
644 module_exit(exit_dtl1_cs);