1 /*
2 *
3 * A driver for Nokia Connectivity Card DTL-1 devices
4 *
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
6 *
7 *
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;
11 *
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.
16 *
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.
20 *
21 */
22
23 #include <linux/module.h>
24
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>
35
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/io.h>
42
43 #include <pcmcia/cistpl.h>
44 #include <pcmcia/ciscode.h>
45 #include <pcmcia/ds.h>
46 #include <pcmcia/cisreg.h>
47
48 #include <net/bluetooth/bluetooth.h>
49 #include <net/bluetooth/hci_core.h>
50
51
52
53 /* ======================== Module parameters ======================== */
54
55
56 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
57 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
58 MODULE_LICENSE("GPL");
59
60
61
62 /* ======================== Local structures ======================== */
63
64
65 struct dtl1_info {
66 struct pcmcia_device *p_dev;
67
68 struct hci_dev *hdev;
69
70 spinlock_t lock; /* For serializing operations */
71
72 unsigned long flowmask; /* HCI flow mask */
73 int ri_latch;
74
75 struct sk_buff_head txq;
76 unsigned long tx_state;
77
78 unsigned long rx_state;
79 unsigned long rx_count;
80 struct sk_buff *rx_skb;
81 };
82
83
84 static int dtl1_config(struct pcmcia_device *link);
85
86
87 /* Transmit states */
88 #define XMIT_SENDING 1
89 #define XMIT_WAKEUP 2
90 #define XMIT_WAITING 8
91
92 /* Receiver States */
93 #define RECV_WAIT_NSH 0
94 #define RECV_WAIT_DATA 1
95
96
97 struct nsh {
98 u8 type;
99 u8 zero;
100 u16 len;
101 } __packed; /* Nokia Specific Header */
102
103 #define NSHL 4 /* Nokia Specific Header Length */
104
105
106
107 /* ======================== Interrupt handling ======================== */
108
109
dtl1_write(unsigned int iobase,int fifo_size,__u8 * buf,int len)110 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
111 {
112 int actual = 0;
113
114 /* Tx FIFO should be empty */
115 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
116 return 0;
117
118 /* Fill FIFO with current frame */
119 while ((fifo_size-- > 0) && (actual < len)) {
120 /* Transmit next byte */
121 outb(buf[actual], iobase + UART_TX);
122 actual++;
123 }
124
125 return actual;
126 }
127
128
dtl1_write_wakeup(struct dtl1_info * info)129 static void dtl1_write_wakeup(struct dtl1_info *info)
130 {
131 if (!info) {
132 BT_ERR("Unknown device");
133 return;
134 }
135
136 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
137 set_bit(XMIT_WAKEUP, &(info->tx_state));
138 return;
139 }
140
141 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
142 set_bit(XMIT_WAKEUP, &(info->tx_state));
143 return;
144 }
145
146 do {
147 unsigned int iobase = info->p_dev->resource[0]->start;
148 register struct sk_buff *skb;
149 int len;
150
151 clear_bit(XMIT_WAKEUP, &(info->tx_state));
152
153 if (!pcmcia_dev_present(info->p_dev))
154 return;
155
156 skb = skb_dequeue(&(info->txq));
157 if (!skb)
158 break;
159
160 /* Send frame */
161 len = dtl1_write(iobase, 32, skb->data, skb->len);
162
163 if (len == skb->len) {
164 set_bit(XMIT_WAITING, &(info->tx_state));
165 kfree_skb(skb);
166 } else {
167 skb_pull(skb, len);
168 skb_queue_head(&(info->txq), skb);
169 }
170
171 info->hdev->stat.byte_tx += len;
172
173 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
174
175 clear_bit(XMIT_SENDING, &(info->tx_state));
176 }
177
178
dtl1_control(struct dtl1_info * info,struct sk_buff * skb)179 static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb)
180 {
181 u8 flowmask = *(u8 *)skb->data;
182 int i;
183
184 printk(KERN_INFO "Bluetooth: Nokia control data =");
185 for (i = 0; i < skb->len; i++)
186 printk(" %02x", skb->data[i]);
187
188 printk("\n");
189
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);
194 }
195
196 info->flowmask = flowmask;
197
198 kfree_skb(skb);
199 }
200
201
dtl1_receive(struct dtl1_info * info)202 static void dtl1_receive(struct dtl1_info *info)
203 {
204 unsigned int iobase;
205 struct nsh *nsh;
206 int boguscount = 0;
207
208 if (!info) {
209 BT_ERR("Unknown device");
210 return;
211 }
212
213 iobase = info->p_dev->resource[0]->start;
214
215 do {
216 info->hdev->stat.byte_rx++;
217
218 /* Allocate packet */
219 if (info->rx_skb == NULL) {
220 info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
221 if (!info->rx_skb) {
222 BT_ERR("Can't allocate mem for new packet");
223 info->rx_state = RECV_WAIT_NSH;
224 info->rx_count = NSHL;
225 return;
226 }
227 }
228
229 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
230 nsh = (struct nsh *)info->rx_skb->data;
231
232 info->rx_count--;
233
234 if (info->rx_count == 0) {
235
236 switch (info->rx_state) {
237 case RECV_WAIT_NSH:
238 info->rx_state = RECV_WAIT_DATA;
239 info->rx_count = nsh->len + (nsh->len & 0x0001);
240 break;
241 case RECV_WAIT_DATA:
242 bt_cb(info->rx_skb)->pkt_type = nsh->type;
243
244 /* remove PAD byte if it exists */
245 if (nsh->len & 0x0001) {
246 info->rx_skb->tail--;
247 info->rx_skb->len--;
248 }
249
250 /* remove NSH */
251 skb_pull(info->rx_skb, NSHL);
252
253 switch (bt_cb(info->rx_skb)->pkt_type) {
254 case 0x80:
255 /* control data for the Nokia Card */
256 dtl1_control(info, info->rx_skb);
257 break;
258 case 0x82:
259 case 0x83:
260 case 0x84:
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);
264 break;
265 default:
266 /* unknown packet */
267 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
268 kfree_skb(info->rx_skb);
269 break;
270 }
271
272 info->rx_state = RECV_WAIT_NSH;
273 info->rx_count = NSHL;
274 info->rx_skb = NULL;
275 break;
276 }
277
278 }
279
280 /* Make sure we don't stay here too long */
281 if (boguscount++ > 32)
282 break;
283
284 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
285 }
286
287
dtl1_interrupt(int irq,void * dev_inst)288 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
289 {
290 struct dtl1_info *info = dev_inst;
291 unsigned int iobase;
292 unsigned char msr;
293 int boguscount = 0;
294 int iir, lsr;
295 irqreturn_t r = IRQ_NONE;
296
297 if (!info || !info->hdev)
298 /* our irq handler is shared */
299 return IRQ_NONE;
300
301 iobase = info->p_dev->resource[0]->start;
302
303 spin_lock(&(info->lock));
304
305 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
306 while (iir) {
307
308 r = IRQ_HANDLED;
309 /* Clear interrupt */
310 lsr = inb(iobase + UART_LSR);
311
312 switch (iir) {
313 case UART_IIR_RLSI:
314 BT_ERR("RLSI");
315 break;
316 case UART_IIR_RDI:
317 /* Receive interrupt */
318 dtl1_receive(info);
319 break;
320 case UART_IIR_THRI:
321 if (lsr & UART_LSR_THRE) {
322 /* Transmitter ready for data */
323 dtl1_write_wakeup(info);
324 }
325 break;
326 default:
327 BT_ERR("Unhandled IIR=%#x", iir);
328 break;
329 }
330
331 /* Make sure we don't stay here too long */
332 if (boguscount++ > 100)
333 break;
334
335 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
336
337 }
338
339 msr = inb(iobase + UART_MSR);
340
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);
345 r = IRQ_HANDLED;
346 }
347
348 spin_unlock(&(info->lock));
349
350 return r;
351 }
352
353
354
355 /* ======================== HCI interface ======================== */
356
357
dtl1_hci_open(struct hci_dev * hdev)358 static int dtl1_hci_open(struct hci_dev *hdev)
359 {
360 return 0;
361 }
362
363
dtl1_hci_flush(struct hci_dev * hdev)364 static int dtl1_hci_flush(struct hci_dev *hdev)
365 {
366 struct dtl1_info *info = hci_get_drvdata(hdev);
367
368 /* Drop TX queue */
369 skb_queue_purge(&(info->txq));
370
371 return 0;
372 }
373
374
dtl1_hci_close(struct hci_dev * hdev)375 static int dtl1_hci_close(struct hci_dev *hdev)
376 {
377 dtl1_hci_flush(hdev);
378
379 return 0;
380 }
381
382
dtl1_hci_send_frame(struct hci_dev * hdev,struct sk_buff * skb)383 static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
384 {
385 struct dtl1_info *info = hci_get_drvdata(hdev);
386 struct sk_buff *s;
387 struct nsh nsh;
388
389 switch (bt_cb(skb)->pkt_type) {
390 case HCI_COMMAND_PKT:
391 hdev->stat.cmd_tx++;
392 nsh.type = 0x81;
393 break;
394 case HCI_ACLDATA_PKT:
395 hdev->stat.acl_tx++;
396 nsh.type = 0x82;
397 break;
398 case HCI_SCODATA_PKT:
399 hdev->stat.sco_tx++;
400 nsh.type = 0x83;
401 break;
402 default:
403 return -EILSEQ;
404 }
405
406 nsh.zero = 0;
407 nsh.len = skb->len;
408
409 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
410 if (!s)
411 return -ENOMEM;
412
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 */
417
418 /* Prepend skb with Nokia frame header and queue */
419 memcpy(skb_push(s, NSHL), &nsh, NSHL);
420 skb_queue_tail(&(info->txq), s);
421
422 dtl1_write_wakeup(info);
423
424 kfree_skb(skb);
425
426 return 0;
427 }
428
429
430
431 /* ======================== Card services HCI interaction ======================== */
432
433
dtl1_open(struct dtl1_info * info)434 static int dtl1_open(struct dtl1_info *info)
435 {
436 unsigned long flags;
437 unsigned int iobase = info->p_dev->resource[0]->start;
438 struct hci_dev *hdev;
439
440 spin_lock_init(&(info->lock));
441
442 skb_queue_head_init(&(info->txq));
443
444 info->rx_state = RECV_WAIT_NSH;
445 info->rx_count = NSHL;
446 info->rx_skb = NULL;
447
448 set_bit(XMIT_WAITING, &(info->tx_state));
449
450 /* Initialize HCI device */
451 hdev = hci_alloc_dev();
452 if (!hdev) {
453 BT_ERR("Can't allocate HCI device");
454 return -ENOMEM;
455 }
456
457 info->hdev = hdev;
458
459 hdev->bus = HCI_PCCARD;
460 hci_set_drvdata(hdev, info);
461 SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
462
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;
467
468 spin_lock_irqsave(&(info->lock), flags);
469
470 /* Reset UART */
471 outb(0, iobase + UART_MCR);
472
473 /* Turn off interrupts */
474 outb(0, iobase + UART_IER);
475
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);
479
480 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
481 & UART_MSR_RI;
482
483 /* Turn on interrupts */
484 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
485
486 spin_unlock_irqrestore(&(info->lock), flags);
487
488 /* Timeout before it is safe to send the first HCI packet */
489 msleep(2000);
490
491 /* Register HCI device */
492 if (hci_register_dev(hdev) < 0) {
493 BT_ERR("Can't register HCI device");
494 info->hdev = NULL;
495 hci_free_dev(hdev);
496 return -ENODEV;
497 }
498
499 return 0;
500 }
501
502
dtl1_close(struct dtl1_info * info)503 static int dtl1_close(struct dtl1_info *info)
504 {
505 unsigned long flags;
506 unsigned int iobase = info->p_dev->resource[0]->start;
507 struct hci_dev *hdev = info->hdev;
508
509 if (!hdev)
510 return -ENODEV;
511
512 dtl1_hci_close(hdev);
513
514 spin_lock_irqsave(&(info->lock), flags);
515
516 /* Reset UART */
517 outb(0, iobase + UART_MCR);
518
519 /* Turn off interrupts */
520 outb(0, iobase + UART_IER);
521
522 spin_unlock_irqrestore(&(info->lock), flags);
523
524 hci_unregister_dev(hdev);
525 hci_free_dev(hdev);
526
527 return 0;
528 }
529
dtl1_probe(struct pcmcia_device * link)530 static int dtl1_probe(struct pcmcia_device *link)
531 {
532 struct dtl1_info *info;
533
534 /* Create new info device */
535 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
536 if (!info)
537 return -ENOMEM;
538
539 info->p_dev = link;
540 link->priv = info;
541
542 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
543
544 return dtl1_config(link);
545 }
546
547
dtl1_detach(struct pcmcia_device * link)548 static void dtl1_detach(struct pcmcia_device *link)
549 {
550 struct dtl1_info *info = link->priv;
551
552 dtl1_close(info);
553 pcmcia_disable_device(link);
554 }
555
dtl1_confcheck(struct pcmcia_device * p_dev,void * priv_data)556 static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
557 {
558 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
559 return -ENODEV;
560
561 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
562 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
563
564 return pcmcia_request_io(p_dev);
565 }
566
dtl1_config(struct pcmcia_device * link)567 static int dtl1_config(struct pcmcia_device *link)
568 {
569 struct dtl1_info *info = link->priv;
570 int ret;
571
572 /* Look for a generic full-sized window */
573 link->resource[0]->end = 8;
574 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
575 if (ret)
576 goto failed;
577
578 ret = pcmcia_request_irq(link, dtl1_interrupt);
579 if (ret)
580 goto failed;
581
582 ret = pcmcia_enable_device(link);
583 if (ret)
584 goto failed;
585
586 ret = dtl1_open(info);
587 if (ret)
588 goto failed;
589
590 return 0;
591
592 failed:
593 dtl1_detach(link);
594 return ret;
595 }
596
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),
602 PCMCIA_DEVICE_NULL
603 };
604 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
605
606 static struct pcmcia_driver dtl1_driver = {
607 .owner = THIS_MODULE,
608 .name = "dtl1_cs",
609 .probe = dtl1_probe,
610 .remove = dtl1_detach,
611 .id_table = dtl1_ids,
612 };
613 module_pcmcia_driver(dtl1_driver);
614