pcmcia: convert pcmcia_request_configuration to pcmcia_enable_device
[linux-2.6.git] / drivers / bluetooth / dtl1_cs.c
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/system.h>
42 #include <asm/io.h>
43
44 #include <pcmcia/cistpl.h>
45 #include <pcmcia/ciscode.h>
46 #include <pcmcia/ds.h>
47 #include <pcmcia/cisreg.h>
48
49 #include <net/bluetooth/bluetooth.h>
50 #include <net/bluetooth/hci_core.h>
51
52
53
54 /* ======================== Module parameters ======================== */
55
56
57 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
58 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
59 MODULE_LICENSE("GPL");
60
61
62
63 /* ======================== Local structures ======================== */
64
65
66 typedef struct dtl1_info_t {
67         struct pcmcia_device *p_dev;
68
69         struct hci_dev *hdev;
70
71         spinlock_t lock;                /* For serializing operations */
72
73         unsigned long flowmask;         /* HCI flow mask */
74         int ri_latch;
75
76         struct sk_buff_head txq;
77         unsigned long tx_state;
78
79         unsigned long rx_state;
80         unsigned long rx_count;
81         struct sk_buff *rx_skb;
82 } dtl1_info_t;
83
84
85 static int dtl1_config(struct pcmcia_device *link);
86 static void dtl1_release(struct pcmcia_device *link);
87
88 static void dtl1_detach(struct pcmcia_device *p_dev);
89
90
91 /* Transmit states  */
92 #define XMIT_SENDING  1
93 #define XMIT_WAKEUP   2
94 #define XMIT_WAITING  8
95
96 /* Receiver States */
97 #define RECV_WAIT_NSH   0
98 #define RECV_WAIT_DATA  1
99
100
101 typedef struct {
102         u8 type;
103         u8 zero;
104         u16 len;
105 } __packed nsh_t;       /* Nokia Specific Header */
106
107 #define NSHL  4                         /* Nokia Specific Header Length */
108
109
110
111 /* ======================== Interrupt handling ======================== */
112
113
114 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
115 {
116         int actual = 0;
117
118         /* Tx FIFO should be empty */
119         if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
120                 return 0;
121
122         /* Fill FIFO with current frame */
123         while ((fifo_size-- > 0) && (actual < len)) {
124                 /* Transmit next byte */
125                 outb(buf[actual], iobase + UART_TX);
126                 actual++;
127         }
128
129         return actual;
130 }
131
132
133 static void dtl1_write_wakeup(dtl1_info_t *info)
134 {
135         if (!info) {
136                 BT_ERR("Unknown device");
137                 return;
138         }
139
140         if (test_bit(XMIT_WAITING, &(info->tx_state))) {
141                 set_bit(XMIT_WAKEUP, &(info->tx_state));
142                 return;
143         }
144
145         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
146                 set_bit(XMIT_WAKEUP, &(info->tx_state));
147                 return;
148         }
149
150         do {
151                 register unsigned int iobase = info->p_dev->resource[0]->start;
152                 register struct sk_buff *skb;
153                 register int len;
154
155                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
156
157                 if (!pcmcia_dev_present(info->p_dev))
158                         return;
159
160                 if (!(skb = skb_dequeue(&(info->txq))))
161                         break;
162
163                 /* Send frame */
164                 len = dtl1_write(iobase, 32, skb->data, skb->len);
165
166                 if (len == skb->len) {
167                         set_bit(XMIT_WAITING, &(info->tx_state));
168                         kfree_skb(skb);
169                 } else {
170                         skb_pull(skb, len);
171                         skb_queue_head(&(info->txq), skb);
172                 }
173
174                 info->hdev->stat.byte_tx += len;
175
176         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
177
178         clear_bit(XMIT_SENDING, &(info->tx_state));
179 }
180
181
182 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
183 {
184         u8 flowmask = *(u8 *)skb->data;
185         int i;
186
187         printk(KERN_INFO "Bluetooth: Nokia control data =");
188         for (i = 0; i < skb->len; i++) {
189                 printk(" %02x", skb->data[i]);
190         }
191         printk("\n");
192
193         /* transition to active state */
194         if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
195                 clear_bit(XMIT_WAITING, &(info->tx_state));
196                 dtl1_write_wakeup(info);
197         }
198
199         info->flowmask = flowmask;
200
201         kfree_skb(skb);
202 }
203
204
205 static void dtl1_receive(dtl1_info_t *info)
206 {
207         unsigned int iobase;
208         nsh_t *nsh;
209         int boguscount = 0;
210
211         if (!info) {
212                 BT_ERR("Unknown device");
213                 return;
214         }
215
216         iobase = info->p_dev->resource[0]->start;
217
218         do {
219                 info->hdev->stat.byte_rx++;
220
221                 /* Allocate packet */
222                 if (info->rx_skb == NULL)
223                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
224                                 BT_ERR("Can't allocate mem for new packet");
225                                 info->rx_state = RECV_WAIT_NSH;
226                                 info->rx_count = NSHL;
227                                 return;
228                         }
229
230                 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
231                 nsh = (nsh_t *)info->rx_skb->data;
232
233                 info->rx_count--;
234
235                 if (info->rx_count == 0) {
236
237                         switch (info->rx_state) {
238                         case RECV_WAIT_NSH:
239                                 info->rx_state = RECV_WAIT_DATA;
240                                 info->rx_count = nsh->len + (nsh->len & 0x0001);
241                                 break;
242                         case RECV_WAIT_DATA:
243                                 bt_cb(info->rx_skb)->pkt_type = nsh->type;
244
245                                 /* remove PAD byte if it exists */
246                                 if (nsh->len & 0x0001) {
247                                         info->rx_skb->tail--;
248                                         info->rx_skb->len--;
249                                 }
250
251                                 /* remove NSH */
252                                 skb_pull(info->rx_skb, NSHL);
253
254                                 switch (bt_cb(info->rx_skb)->pkt_type) {
255                                 case 0x80:
256                                         /* control data for the Nokia Card */
257                                         dtl1_control(info, info->rx_skb);
258                                         break;
259                                 case 0x82:
260                                 case 0x83:
261                                 case 0x84:
262                                         /* send frame to the HCI layer */
263                                         info->rx_skb->dev = (void *) info->hdev;
264                                         bt_cb(info->rx_skb)->pkt_type &= 0x0f;
265                                         hci_recv_frame(info->rx_skb);
266                                         break;
267                                 default:
268                                         /* unknown packet */
269                                         BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
270                                         kfree_skb(info->rx_skb);
271                                         break;
272                                 }
273
274                                 info->rx_state = RECV_WAIT_NSH;
275                                 info->rx_count = NSHL;
276                                 info->rx_skb = NULL;
277                                 break;
278                         }
279
280                 }
281
282                 /* Make sure we don't stay here too long */
283                 if (boguscount++ > 32)
284                         break;
285
286         } while (inb(iobase + UART_LSR) & UART_LSR_DR);
287 }
288
289
290 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
291 {
292         dtl1_info_t *info = dev_inst;
293         unsigned int iobase;
294         unsigned char msr;
295         int boguscount = 0;
296         int iir, lsr;
297         irqreturn_t r = IRQ_NONE;
298
299         if (!info || !info->hdev)
300                 /* our irq handler is shared */
301                 return IRQ_NONE;
302
303         iobase = info->p_dev->resource[0]->start;
304
305         spin_lock(&(info->lock));
306
307         iir = inb(iobase + UART_IIR) & UART_IIR_ID;
308         while (iir) {
309
310                 r = IRQ_HANDLED;
311                 /* Clear interrupt */
312                 lsr = inb(iobase + UART_LSR);
313
314                 switch (iir) {
315                 case UART_IIR_RLSI:
316                         BT_ERR("RLSI");
317                         break;
318                 case UART_IIR_RDI:
319                         /* Receive interrupt */
320                         dtl1_receive(info);
321                         break;
322                 case UART_IIR_THRI:
323                         if (lsr & UART_LSR_THRE) {
324                                 /* Transmitter ready for data */
325                                 dtl1_write_wakeup(info);
326                         }
327                         break;
328                 default:
329                         BT_ERR("Unhandled IIR=%#x", iir);
330                         break;
331                 }
332
333                 /* Make sure we don't stay here too long */
334                 if (boguscount++ > 100)
335                         break;
336
337                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
338
339         }
340
341         msr = inb(iobase + UART_MSR);
342
343         if (info->ri_latch ^ (msr & UART_MSR_RI)) {
344                 info->ri_latch = msr & UART_MSR_RI;
345                 clear_bit(XMIT_WAITING, &(info->tx_state));
346                 dtl1_write_wakeup(info);
347                 r = IRQ_HANDLED;
348         }
349
350         spin_unlock(&(info->lock));
351
352         return r;
353 }
354
355
356
357 /* ======================== HCI interface ======================== */
358
359
360 static int dtl1_hci_open(struct hci_dev *hdev)
361 {
362         set_bit(HCI_RUNNING, &(hdev->flags));
363
364         return 0;
365 }
366
367
368 static int dtl1_hci_flush(struct hci_dev *hdev)
369 {
370         dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
371
372         /* Drop TX queue */
373         skb_queue_purge(&(info->txq));
374
375         return 0;
376 }
377
378
379 static int dtl1_hci_close(struct hci_dev *hdev)
380 {
381         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
382                 return 0;
383
384         dtl1_hci_flush(hdev);
385
386         return 0;
387 }
388
389
390 static int dtl1_hci_send_frame(struct sk_buff *skb)
391 {
392         dtl1_info_t *info;
393         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
394         struct sk_buff *s;
395         nsh_t nsh;
396
397         if (!hdev) {
398                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
399                 return -ENODEV;
400         }
401
402         info = (dtl1_info_t *)(hdev->driver_data);
403
404         switch (bt_cb(skb)->pkt_type) {
405         case HCI_COMMAND_PKT:
406                 hdev->stat.cmd_tx++;
407                 nsh.type = 0x81;
408                 break;
409         case HCI_ACLDATA_PKT:
410                 hdev->stat.acl_tx++;
411                 nsh.type = 0x82;
412                 break;
413         case HCI_SCODATA_PKT:
414                 hdev->stat.sco_tx++;
415                 nsh.type = 0x83;
416                 break;
417         default:
418                 return -EILSEQ;
419         };
420
421         nsh.zero = 0;
422         nsh.len = skb->len;
423
424         s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
425         if (!s)
426                 return -ENOMEM;
427
428         skb_reserve(s, NSHL);
429         skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
430         if (skb->len & 0x0001)
431                 *skb_put(s, 1) = 0;     /* PAD */
432
433         /* Prepend skb with Nokia frame header and queue */
434         memcpy(skb_push(s, NSHL), &nsh, NSHL);
435         skb_queue_tail(&(info->txq), s);
436
437         dtl1_write_wakeup(info);
438
439         kfree_skb(skb);
440
441         return 0;
442 }
443
444
445 static void dtl1_hci_destruct(struct hci_dev *hdev)
446 {
447 }
448
449
450 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd,  unsigned long arg)
451 {
452         return -ENOIOCTLCMD;
453 }
454
455
456
457 /* ======================== Card services HCI interaction ======================== */
458
459
460 static int dtl1_open(dtl1_info_t *info)
461 {
462         unsigned long flags;
463         unsigned int iobase = info->p_dev->resource[0]->start;
464         struct hci_dev *hdev;
465
466         spin_lock_init(&(info->lock));
467
468         skb_queue_head_init(&(info->txq));
469
470         info->rx_state = RECV_WAIT_NSH;
471         info->rx_count = NSHL;
472         info->rx_skb = NULL;
473
474         set_bit(XMIT_WAITING, &(info->tx_state));
475
476         /* Initialize HCI device */
477         hdev = hci_alloc_dev();
478         if (!hdev) {
479                 BT_ERR("Can't allocate HCI device");
480                 return -ENOMEM;
481         }
482
483         info->hdev = hdev;
484
485         hdev->bus = HCI_PCCARD;
486         hdev->driver_data = info;
487         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
488
489         hdev->open     = dtl1_hci_open;
490         hdev->close    = dtl1_hci_close;
491         hdev->flush    = dtl1_hci_flush;
492         hdev->send     = dtl1_hci_send_frame;
493         hdev->destruct = dtl1_hci_destruct;
494         hdev->ioctl    = dtl1_hci_ioctl;
495
496         hdev->owner = THIS_MODULE;
497
498         spin_lock_irqsave(&(info->lock), flags);
499
500         /* Reset UART */
501         outb(0, iobase + UART_MCR);
502
503         /* Turn off interrupts */
504         outb(0, iobase + UART_IER);
505
506         /* Initialize UART */
507         outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
508         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
509
510         info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
511                                 & UART_MSR_RI;
512
513         /* Turn on interrupts */
514         outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
515
516         spin_unlock_irqrestore(&(info->lock), flags);
517
518         /* Timeout before it is safe to send the first HCI packet */
519         msleep(2000);
520
521         /* Register HCI device */
522         if (hci_register_dev(hdev) < 0) {
523                 BT_ERR("Can't register HCI device");
524                 info->hdev = NULL;
525                 hci_free_dev(hdev);
526                 return -ENODEV;
527         }
528
529         return 0;
530 }
531
532
533 static int dtl1_close(dtl1_info_t *info)
534 {
535         unsigned long flags;
536         unsigned int iobase = info->p_dev->resource[0]->start;
537         struct hci_dev *hdev = info->hdev;
538
539         if (!hdev)
540                 return -ENODEV;
541
542         dtl1_hci_close(hdev);
543
544         spin_lock_irqsave(&(info->lock), flags);
545
546         /* Reset UART */
547         outb(0, iobase + UART_MCR);
548
549         /* Turn off interrupts */
550         outb(0, iobase + UART_IER);
551
552         spin_unlock_irqrestore(&(info->lock), flags);
553
554         if (hci_unregister_dev(hdev) < 0)
555                 BT_ERR("Can't unregister HCI device %s", hdev->name);
556
557         hci_free_dev(hdev);
558
559         return 0;
560 }
561
562 static int dtl1_probe(struct pcmcia_device *link)
563 {
564         dtl1_info_t *info;
565
566         /* Create new info device */
567         info = kzalloc(sizeof(*info), GFP_KERNEL);
568         if (!info)
569                 return -ENOMEM;
570
571         info->p_dev = link;
572         link->priv = info;
573
574         link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
575         link->resource[0]->end = 8;
576
577         link->config_flags |= CONF_ENABLE_IRQ;
578
579         return dtl1_config(link);
580 }
581
582
583 static void dtl1_detach(struct pcmcia_device *link)
584 {
585         dtl1_info_t *info = link->priv;
586
587         dtl1_release(link);
588
589         kfree(info);
590 }
591
592 static int dtl1_confcheck(struct pcmcia_device *p_dev,
593                           cistpl_cftable_entry_t *cf,
594                           cistpl_cftable_entry_t *dflt,
595                           unsigned int vcc,
596                           void *priv_data)
597 {
598         if ((cf->io.nwin != 1) || (cf->io.win[0].len <= 8))
599                 return -ENODEV;
600
601         p_dev->resource[0]->start = cf->io.win[0].base;
602         p_dev->resource[0]->end = cf->io.win[0].len;    /*yo */
603         p_dev->io_lines = cf->io.flags & CISTPL_IO_LINES_MASK;
604         return pcmcia_request_io(p_dev);
605 }
606
607 static int dtl1_config(struct pcmcia_device *link)
608 {
609         dtl1_info_t *info = link->priv;
610         int i;
611
612         /* Look for a generic full-sized window */
613         link->resource[0]->end = 8;
614         if (pcmcia_loop_config(link, dtl1_confcheck, NULL) < 0)
615                 goto failed;
616
617         i = pcmcia_request_irq(link, dtl1_interrupt);
618         if (i != 0)
619                 goto failed;
620
621         i = pcmcia_enable_device(link);
622         if (i != 0)
623                 goto failed;
624
625         if (dtl1_open(info) != 0)
626                 goto failed;
627
628         return 0;
629
630 failed:
631         dtl1_release(link);
632         return -ENODEV;
633 }
634
635
636 static void dtl1_release(struct pcmcia_device *link)
637 {
638         dtl1_info_t *info = link->priv;
639
640         dtl1_close(info);
641
642         pcmcia_disable_device(link);
643 }
644
645
646 static struct pcmcia_device_id dtl1_ids[] = {
647         PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
648         PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
649         PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
650         PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
651         PCMCIA_DEVICE_NULL
652 };
653 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
654
655 static struct pcmcia_driver dtl1_driver = {
656         .owner          = THIS_MODULE,
657         .drv            = {
658                 .name   = "dtl1_cs",
659         },
660         .probe          = dtl1_probe,
661         .remove         = dtl1_detach,
662         .id_table       = dtl1_ids,
663 };
664
665 static int __init init_dtl1_cs(void)
666 {
667         return pcmcia_register_driver(&dtl1_driver);
668 }
669
670
671 static void __exit exit_dtl1_cs(void)
672 {
673         pcmcia_unregister_driver(&dtl1_driver);
674 }
675
676 module_init(init_dtl1_cs);
677 module_exit(exit_dtl1_cs);