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>
43 #include <pcmcia/cistpl.h>
44 #include <pcmcia/ciscode.h>
45 #include <pcmcia/ds.h>
46 #include <pcmcia/cisreg.h>
48 #include <net/bluetooth/bluetooth.h>
49 #include <net/bluetooth/hci_core.h>
53 /* ======================== Module parameters ======================== */
56 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
57 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
58 MODULE_LICENSE("GPL");
62 /* ======================== Local structures ======================== */
66 struct pcmcia_device *p_dev;
70 spinlock_t lock; /* For serializing operations */
72 unsigned long flowmask; /* HCI flow mask */
75 struct sk_buff_head txq;
76 unsigned long tx_state;
78 unsigned long rx_state;
79 unsigned long rx_count;
80 struct sk_buff *rx_skb;
84 static int dtl1_config(struct pcmcia_device *link);
88 #define XMIT_SENDING 1
90 #define XMIT_WAITING 8
93 #define RECV_WAIT_NSH 0
94 #define RECV_WAIT_DATA 1
101 } __packed; /* Nokia Specific Header */
103 #define NSHL 4 /* Nokia Specific Header Length */
107 /* ======================== Interrupt handling ======================== */
110 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
114 /* Tx FIFO should be empty */
115 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
118 /* Fill FIFO with current frame */
119 while ((fifo_size-- > 0) && (actual < len)) {
120 /* Transmit next byte */
121 outb(buf[actual], iobase + UART_TX);
129 static void dtl1_write_wakeup(struct dtl1_info *info)
132 BT_ERR("Unknown device");
136 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
137 set_bit(XMIT_WAKEUP, &(info->tx_state));
141 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
142 set_bit(XMIT_WAKEUP, &(info->tx_state));
147 unsigned int iobase = info->p_dev->resource[0]->start;
148 register struct sk_buff *skb;
151 clear_bit(XMIT_WAKEUP, &(info->tx_state));
153 if (!pcmcia_dev_present(info->p_dev))
156 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(struct dtl1_info *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(struct dtl1_info *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 info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
222 BT_ERR("Can't allocate mem for new packet");
223 info->rx_state = RECV_WAIT_NSH;
224 info->rx_count = NSHL;
229 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
230 nsh = (struct nsh *)info->rx_skb->data;
234 if (info->rx_count == 0) {
236 switch (info->rx_state) {
238 info->rx_state = RECV_WAIT_DATA;
239 info->rx_count = nsh->len + (nsh->len & 0x0001);
242 bt_cb(info->rx_skb)->pkt_type = nsh->type;
244 /* remove PAD byte if it exists */
245 if (nsh->len & 0x0001) {
246 info->rx_skb->tail--;
251 skb_pull(info->rx_skb, NSHL);
253 switch (bt_cb(info->rx_skb)->pkt_type) {
255 /* control data for the Nokia Card */
256 dtl1_control(info, info->rx_skb);
261 /* send frame to the HCI layer */
262 bt_cb(info->rx_skb)->pkt_type &= 0x0f;
263 hci_recv_frame(info->hdev, info->rx_skb);
267 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
268 kfree_skb(info->rx_skb);
272 info->rx_state = RECV_WAIT_NSH;
273 info->rx_count = NSHL;
280 /* Make sure we don't stay here too long */
281 if (boguscount++ > 32)
284 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
288 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
290 struct dtl1_info *info = dev_inst;
295 irqreturn_t r = IRQ_NONE;
297 if (!info || !info->hdev)
298 /* our irq handler is shared */
301 iobase = info->p_dev->resource[0]->start;
303 spin_lock(&(info->lock));
305 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
309 /* Clear interrupt */
310 lsr = inb(iobase + UART_LSR);
317 /* Receive interrupt */
321 if (lsr & UART_LSR_THRE) {
322 /* Transmitter ready for data */
323 dtl1_write_wakeup(info);
327 BT_ERR("Unhandled IIR=%#x", iir);
331 /* Make sure we don't stay here too long */
332 if (boguscount++ > 100)
335 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
339 msr = inb(iobase + UART_MSR);
341 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
342 info->ri_latch = msr & UART_MSR_RI;
343 clear_bit(XMIT_WAITING, &(info->tx_state));
344 dtl1_write_wakeup(info);
348 spin_unlock(&(info->lock));
355 /* ======================== HCI interface ======================== */
358 static int dtl1_hci_open(struct hci_dev *hdev)
364 static int dtl1_hci_flush(struct hci_dev *hdev)
366 struct dtl1_info *info = hci_get_drvdata(hdev);
369 skb_queue_purge(&(info->txq));
375 static int dtl1_hci_close(struct hci_dev *hdev)
377 dtl1_hci_flush(hdev);
383 static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
385 struct dtl1_info *info = hci_get_drvdata(hdev);
389 switch (bt_cb(skb)->pkt_type) {
390 case HCI_COMMAND_PKT:
394 case HCI_ACLDATA_PKT:
398 case HCI_SCODATA_PKT:
409 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
413 skb_reserve(s, NSHL);
414 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
415 if (skb->len & 0x0001)
416 *skb_put(s, 1) = 0; /* PAD */
418 /* Prepend skb with Nokia frame header and queue */
419 memcpy(skb_push(s, NSHL), &nsh, NSHL);
420 skb_queue_tail(&(info->txq), s);
422 dtl1_write_wakeup(info);
431 /* ======================== Card services HCI interaction ======================== */
434 static int dtl1_open(struct dtl1_info *info)
437 unsigned int iobase = info->p_dev->resource[0]->start;
438 struct hci_dev *hdev;
440 spin_lock_init(&(info->lock));
442 skb_queue_head_init(&(info->txq));
444 info->rx_state = RECV_WAIT_NSH;
445 info->rx_count = NSHL;
448 set_bit(XMIT_WAITING, &(info->tx_state));
450 /* Initialize HCI device */
451 hdev = hci_alloc_dev();
453 BT_ERR("Can't allocate HCI device");
459 hdev->bus = HCI_PCCARD;
460 hci_set_drvdata(hdev, info);
461 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
463 hdev->open = dtl1_hci_open;
464 hdev->close = dtl1_hci_close;
465 hdev->flush = dtl1_hci_flush;
466 hdev->send = dtl1_hci_send_frame;
468 spin_lock_irqsave(&(info->lock), flags);
471 outb(0, iobase + UART_MCR);
473 /* Turn off interrupts */
474 outb(0, iobase + UART_IER);
476 /* Initialize UART */
477 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
478 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
480 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
483 /* Turn on interrupts */
484 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
486 spin_unlock_irqrestore(&(info->lock), flags);
488 /* Timeout before it is safe to send the first HCI packet */
491 /* Register HCI device */
492 if (hci_register_dev(hdev) < 0) {
493 BT_ERR("Can't register HCI device");
503 static int dtl1_close(struct dtl1_info *info)
506 unsigned int iobase = info->p_dev->resource[0]->start;
507 struct hci_dev *hdev = info->hdev;
512 dtl1_hci_close(hdev);
514 spin_lock_irqsave(&(info->lock), flags);
517 outb(0, iobase + UART_MCR);
519 /* Turn off interrupts */
520 outb(0, iobase + UART_IER);
522 spin_unlock_irqrestore(&(info->lock), flags);
524 hci_unregister_dev(hdev);
530 static int dtl1_probe(struct pcmcia_device *link)
532 struct dtl1_info *info;
534 /* Create new info device */
535 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
542 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
544 return dtl1_config(link);
548 static void dtl1_detach(struct pcmcia_device *link)
550 struct dtl1_info *info = link->priv;
553 pcmcia_disable_device(link);
556 static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
558 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
561 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
562 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
564 return pcmcia_request_io(p_dev);
567 static int dtl1_config(struct pcmcia_device *link)
569 struct dtl1_info *info = link->priv;
572 /* Look for a generic full-sized window */
573 link->resource[0]->end = 8;
574 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
578 ret = pcmcia_request_irq(link, dtl1_interrupt);
582 ret = pcmcia_enable_device(link);
586 ret = dtl1_open(info);
597 static const struct pcmcia_device_id dtl1_ids[] = {
598 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
599 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
600 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
601 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
604 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
606 static struct pcmcia_driver dtl1_driver = {
607 .owner = THIS_MODULE,
610 .remove = dtl1_detach,
611 .id_table = dtl1_ids,
613 module_pcmcia_driver(dtl1_driver);