Merge branch 'topic/emu10k1' into for-linus
[linux-2.6] / drivers / net / irda / nsc-ircc.c
1 /*********************************************************************
2  *                
3  * Filename:      nsc-ircc.c
4  * Version:       1.0
5  * Description:   Driver for the NSC PC'108 and PC'338 IrDA chipsets
6  * Status:        Stable.
7  * Author:        Dag Brattli <dagb@cs.uit.no>
8  * Created at:    Sat Nov  7 21:43:15 1998
9  * Modified at:   Wed Mar  1 11:29:34 2000
10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
11  * 
12  *     Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
13  *     Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
14  *     Copyright (c) 1998 Actisys Corp., www.actisys.com
15  *     Copyright (c) 2000-2004 Jean Tourrilhes <jt@hpl.hp.com>
16  *     All Rights Reserved
17  *      
18  *     This program is free software; you can redistribute it and/or 
19  *     modify it under the terms of the GNU General Public License as 
20  *     published by the Free Software Foundation; either version 2 of 
21  *     the License, or (at your option) any later version.
22  *  
23  *     Neither Dag Brattli nor University of Tromsø admit liability nor
24  *     provide warranty for any of this software. This material is 
25  *     provided "AS-IS" and at no charge.
26  *
27  *     Notice that all functions that needs to access the chip in _any_
28  *     way, must save BSR register on entry, and restore it on exit. 
29  *     It is _very_ important to follow this policy!
30  *
31  *         __u8 bank;
32  *     
33  *         bank = inb(iobase+BSR);
34  *  
35  *         do_your_stuff_here();
36  *
37  *         outb(bank, iobase+BSR);
38  *
39  *    If you find bugs in this file, its very likely that the same bug
40  *    will also be in w83977af_ir.c since the implementations are quite
41  *    similar.
42  *     
43  ********************************************************************/
44
45 #include <linux/module.h>
46
47 #include <linux/kernel.h>
48 #include <linux/types.h>
49 #include <linux/skbuff.h>
50 #include <linux/netdevice.h>
51 #include <linux/ioport.h>
52 #include <linux/delay.h>
53 #include <linux/slab.h>
54 #include <linux/init.h>
55 #include <linux/rtnetlink.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/pnp.h>
58 #include <linux/platform_device.h>
59
60 #include <asm/io.h>
61 #include <asm/dma.h>
62 #include <asm/byteorder.h>
63
64 #include <net/irda/wrapper.h>
65 #include <net/irda/irda.h>
66 #include <net/irda/irda_device.h>
67
68 #include "nsc-ircc.h"
69
70 #define CHIP_IO_EXTENT 8
71 #define BROKEN_DONGLE_ID
72
73 static char *driver_name = "nsc-ircc";
74
75 /* Power Management */
76 #define NSC_IRCC_DRIVER_NAME                  "nsc-ircc"
77 static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
78 static int nsc_ircc_resume(struct platform_device *dev);
79
80 static struct platform_driver nsc_ircc_driver = {
81         .suspend        = nsc_ircc_suspend,
82         .resume         = nsc_ircc_resume,
83         .driver         = {
84                 .name   = NSC_IRCC_DRIVER_NAME,
85         },
86 };
87
88 /* Module parameters */
89 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
90 static int dongle_id;
91
92 /* Use BIOS settions by default, but user may supply module parameters */
93 static unsigned int io[]  = { ~0, ~0, ~0, ~0, ~0 };
94 static unsigned int irq[] = {  0,  0,  0,  0,  0 };
95 static unsigned int dma[] = {  0,  0,  0,  0,  0 };
96
97 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info);
98 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info);
99 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info);
100 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info);
101 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info);
102 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info);
103 #ifdef CONFIG_PNP
104 static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id);
105 #endif
106
107 /* These are the known NSC chips */
108 static nsc_chip_t chips[] = {
109 /*  Name, {cfg registers}, chip id index reg, chip id expected value, revision mask */
110         { "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0, 
111           nsc_ircc_probe_108, nsc_ircc_init_108 },
112         { "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf8, 
113           nsc_ircc_probe_338, nsc_ircc_init_338 },
114         /* Contributed by Steffen Pingel - IBM X40 */
115         { "PC8738x", { 0x164e, 0x4e, 0x2e }, 0x20, 0xf4, 0xff,
116           nsc_ircc_probe_39x, nsc_ircc_init_39x },
117         /* Contributed by Jan Frey - IBM A30/A31 */
118         { "PC8739x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xea, 0xff, 
119           nsc_ircc_probe_39x, nsc_ircc_init_39x },
120         /* IBM ThinkPads using PC8738x (T60/X60/Z60) */
121         { "IBM-PC8738x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf4, 0xff,
122           nsc_ircc_probe_39x, nsc_ircc_init_39x },
123         /* IBM ThinkPads using PC8394T (T43/R52/?) */
124         { "IBM-PC8394T", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf9, 0xff,
125           nsc_ircc_probe_39x, nsc_ircc_init_39x },
126         { NULL }
127 };
128
129 static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL, NULL };
130
131 static char *dongle_types[] = {
132         "Differential serial interface",
133         "Differential serial interface",
134         "Reserved",
135         "Reserved",
136         "Sharp RY5HD01",
137         "Reserved",
138         "Single-ended serial interface",
139         "Consumer-IR only",
140         "HP HSDL-2300, HP HSDL-3600/HSDL-3610",
141         "IBM31T1100 or Temic TFDS6000/TFDS6500",
142         "Reserved",
143         "Reserved",
144         "HP HSDL-1100/HSDL-2100",
145         "HP HSDL-1100/HSDL-2100",
146         "Supports SIR Mode only",
147         "No dongle connected",
148 };
149
150 /* PNP probing */
151 static chipio_t pnp_info;
152 static const struct pnp_device_id nsc_ircc_pnp_table[] = {
153         { .id = "NSC6001", .driver_data = 0 },
154         { .id = "HWPC224", .driver_data = 0 },
155         { .id = "IBM0071", .driver_data = NSC_FORCE_DONGLE_TYPE9 },
156         { }
157 };
158
159 MODULE_DEVICE_TABLE(pnp, nsc_ircc_pnp_table);
160
161 static struct pnp_driver nsc_ircc_pnp_driver = {
162 #ifdef CONFIG_PNP
163         .name = "nsc-ircc",
164         .id_table = nsc_ircc_pnp_table,
165         .probe = nsc_ircc_pnp_probe,
166 #endif
167 };
168
169 /* Some prototypes */
170 static int  nsc_ircc_open(chipio_t *info);
171 static int  nsc_ircc_close(struct nsc_ircc_cb *self);
172 static int  nsc_ircc_setup(chipio_t *info);
173 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self);
174 static int  nsc_ircc_dma_receive(struct nsc_ircc_cb *self); 
175 static int  nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase);
176 static int  nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
177 static int  nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
178 static int  nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
179 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase);
180 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud);
181 static int  nsc_ircc_is_receiving(struct nsc_ircc_cb *self);
182 static int  nsc_ircc_read_dongle_id (int iobase);
183 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id);
184
185 static int  nsc_ircc_net_open(struct net_device *dev);
186 static int  nsc_ircc_net_close(struct net_device *dev);
187 static int  nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
188
189 /* Globals */
190 static int pnp_registered;
191 static int pnp_succeeded;
192
193 /*
194  * Function nsc_ircc_init ()
195  *
196  *    Initialize chip. Just try to find out how many chips we are dealing with
197  *    and where they are
198  */
199 static int __init nsc_ircc_init(void)
200 {
201         chipio_t info;
202         nsc_chip_t *chip;
203         int ret;
204         int cfg_base;
205         int cfg, id;
206         int reg;
207         int i = 0;
208
209         ret = platform_driver_register(&nsc_ircc_driver);
210         if (ret) {
211                 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
212                 return ret;
213         }
214
215         /* Register with PnP subsystem to detect disable ports */
216         ret = pnp_register_driver(&nsc_ircc_pnp_driver);
217
218         if (!ret)
219                 pnp_registered = 1;
220
221         ret = -ENODEV;
222
223         /* Probe for all the NSC chipsets we know about */
224         for (chip = chips; chip->name ; chip++) {
225                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__,
226                            chip->name);
227                 
228                 /* Try all config registers for this chip */
229                 for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) {
230                         cfg_base = chip->cfg[cfg];
231                         if (!cfg_base)
232                                 continue;
233
234                         /* Read index register */
235                         reg = inb(cfg_base);
236                         if (reg == 0xff) {
237                                 IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __func__, cfg_base);
238                                 continue;
239                         }
240                         
241                         /* Read chip identification register */
242                         outb(chip->cid_index, cfg_base);
243                         id = inb(cfg_base+1);
244                         if ((id & chip->cid_mask) == chip->cid_value) {
245                                 IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n",
246                                            __func__, chip->name, id & ~chip->cid_mask);
247
248                                 /*
249                                  * If we found a correct PnP setting,
250                                  * we first try it.
251                                  */
252                                 if (pnp_succeeded) {
253                                         memset(&info, 0, sizeof(chipio_t));
254                                         info.cfg_base = cfg_base;
255                                         info.fir_base = pnp_info.fir_base;
256                                         info.dma = pnp_info.dma;
257                                         info.irq = pnp_info.irq;
258
259                                         if (info.fir_base < 0x2000) {
260                                                 IRDA_MESSAGE("%s, chip->init\n", driver_name);
261                                                 chip->init(chip, &info);
262                                         } else
263                                                 chip->probe(chip, &info);
264
265                                         if (nsc_ircc_open(&info) >= 0)
266                                                 ret = 0;
267                                 }
268
269                                 /*
270                                  * Opening based on PnP values failed.
271                                  * Let's fallback to user values, or probe
272                                  * the chip.
273                                  */
274                                 if (ret) {
275                                         IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name);
276                                         memset(&info, 0, sizeof(chipio_t));
277                                         info.cfg_base = cfg_base;
278                                         info.fir_base = io[i];
279                                         info.dma = dma[i];
280                                         info.irq = irq[i];
281
282                                         /*
283                                          * If the user supplies the base address, then
284                                          * we init the chip, if not we probe the values
285                                          * set by the BIOS
286                                          */
287                                         if (io[i] < 0x2000) {
288                                                 chip->init(chip, &info);
289                                         } else
290                                                 chip->probe(chip, &info);
291
292                                         if (nsc_ircc_open(&info) >= 0)
293                                                 ret = 0;
294                                 }
295                                 i++;
296                         } else {
297                                 IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __func__, id);
298                         }
299                 } 
300         }
301
302         if (ret) {
303                 platform_driver_unregister(&nsc_ircc_driver);
304                 pnp_unregister_driver(&nsc_ircc_pnp_driver);
305                 pnp_registered = 0;
306         }
307
308         return ret;
309 }
310
311 /*
312  * Function nsc_ircc_cleanup ()
313  *
314  *    Close all configured chips
315  *
316  */
317 static void __exit nsc_ircc_cleanup(void)
318 {
319         int i;
320
321         for (i = 0; i < ARRAY_SIZE(dev_self); i++) {
322                 if (dev_self[i])
323                         nsc_ircc_close(dev_self[i]);
324         }
325
326         platform_driver_unregister(&nsc_ircc_driver);
327
328         if (pnp_registered)
329                 pnp_unregister_driver(&nsc_ircc_pnp_driver);
330
331         pnp_registered = 0;
332 }
333
334 static const struct net_device_ops nsc_ircc_sir_ops = {
335         .ndo_open       = nsc_ircc_net_open,
336         .ndo_stop       = nsc_ircc_net_close,
337         .ndo_start_xmit = nsc_ircc_hard_xmit_sir,
338         .ndo_do_ioctl   = nsc_ircc_net_ioctl,
339 };
340
341 static const struct net_device_ops nsc_ircc_fir_ops = {
342         .ndo_open       = nsc_ircc_net_open,
343         .ndo_stop       = nsc_ircc_net_close,
344         .ndo_start_xmit = nsc_ircc_hard_xmit_fir,
345         .ndo_do_ioctl   = nsc_ircc_net_ioctl,
346 };
347
348 /*
349  * Function nsc_ircc_open (iobase, irq)
350  *
351  *    Open driver instance
352  *
353  */
354 static int __init nsc_ircc_open(chipio_t *info)
355 {
356         struct net_device *dev;
357         struct nsc_ircc_cb *self;
358         void *ret;
359         int err, chip_index;
360
361         IRDA_DEBUG(2, "%s()\n", __func__);
362
363
364         for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) {
365                 if (!dev_self[chip_index])
366                         break;
367         }
368
369         if (chip_index == ARRAY_SIZE(dev_self)) {
370                 IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __func__);
371                 return -ENOMEM;
372         }
373
374         IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
375                      info->cfg_base);
376
377         if ((nsc_ircc_setup(info)) == -1)
378                 return -1;
379
380         IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
381
382         dev = alloc_irdadev(sizeof(struct nsc_ircc_cb));
383         if (dev == NULL) {
384                 IRDA_ERROR("%s(), can't allocate memory for "
385                            "control block!\n", __func__);
386                 return -ENOMEM;
387         }
388
389         self = netdev_priv(dev);
390         self->netdev = dev;
391         spin_lock_init(&self->lock);
392    
393         /* Need to store self somewhere */
394         dev_self[chip_index] = self;
395         self->index = chip_index;
396
397         /* Initialize IO */
398         self->io.cfg_base  = info->cfg_base;
399         self->io.fir_base  = info->fir_base;
400         self->io.irq       = info->irq;
401         self->io.fir_ext   = CHIP_IO_EXTENT;
402         self->io.dma       = info->dma;
403         self->io.fifo_size = 32;
404         
405         /* Reserve the ioports that we need */
406         ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name);
407         if (!ret) {
408                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n",
409                              __func__, self->io.fir_base);
410                 err = -ENODEV;
411                 goto out1;
412         }
413
414         /* Initialize QoS for this device */
415         irda_init_max_qos_capabilies(&self->qos);
416         
417         /* The only value we must override it the baudrate */
418         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
419                 IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8);
420         
421         self->qos.min_turn_time.bits = qos_mtt_bits;
422         irda_qos_bits_to_value(&self->qos);
423         
424         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
425         self->rx_buff.truesize = 14384; 
426         self->tx_buff.truesize = 14384;
427
428         /* Allocate memory if needed */
429         self->rx_buff.head =
430                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
431                                    &self->rx_buff_dma, GFP_KERNEL);
432         if (self->rx_buff.head == NULL) {
433                 err = -ENOMEM;
434                 goto out2;
435
436         }
437         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
438         
439         self->tx_buff.head =
440                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
441                                    &self->tx_buff_dma, GFP_KERNEL);
442         if (self->tx_buff.head == NULL) {
443                 err = -ENOMEM;
444                 goto out3;
445         }
446         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
447
448         self->rx_buff.in_frame = FALSE;
449         self->rx_buff.state = OUTSIDE_FRAME;
450         self->tx_buff.data = self->tx_buff.head;
451         self->rx_buff.data = self->rx_buff.head;
452         
453         /* Reset Tx queue info */
454         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
455         self->tx_fifo.tail = self->tx_buff.head;
456
457         /* Override the network functions we need to use */
458         dev->netdev_ops = &nsc_ircc_sir_ops;
459
460         err = register_netdev(dev);
461         if (err) {
462                 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
463                 goto out4;
464         }
465         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
466
467         /* Check if user has supplied a valid dongle id or not */
468         if ((dongle_id <= 0) ||
469             (dongle_id >= ARRAY_SIZE(dongle_types))) {
470                 dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
471                 
472                 IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name,
473                              dongle_types[dongle_id]);
474         } else {
475                 IRDA_MESSAGE("%s, Using dongle: %s\n", driver_name,
476                              dongle_types[dongle_id]);
477         }
478         
479         self->io.dongle_id = dongle_id;
480         nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id);
481
482         self->pldev = platform_device_register_simple(NSC_IRCC_DRIVER_NAME,
483                                                       self->index, NULL, 0);
484         if (IS_ERR(self->pldev)) {
485                 err = PTR_ERR(self->pldev);
486                 goto out5;
487         }
488         platform_set_drvdata(self->pldev, self);
489
490         return chip_index;
491
492  out5:
493         unregister_netdev(dev);
494  out4:
495         dma_free_coherent(NULL, self->tx_buff.truesize,
496                           self->tx_buff.head, self->tx_buff_dma);
497  out3:
498         dma_free_coherent(NULL, self->rx_buff.truesize,
499                           self->rx_buff.head, self->rx_buff_dma);
500  out2:
501         release_region(self->io.fir_base, self->io.fir_ext);
502  out1:
503         free_netdev(dev);
504         dev_self[chip_index] = NULL;
505         return err;
506 }
507
508 /*
509  * Function nsc_ircc_close (self)
510  *
511  *    Close driver instance
512  *
513  */
514 static int __exit nsc_ircc_close(struct nsc_ircc_cb *self)
515 {
516         int iobase;
517
518         IRDA_DEBUG(4, "%s()\n", __func__);
519
520         IRDA_ASSERT(self != NULL, return -1;);
521
522         iobase = self->io.fir_base;
523
524         platform_device_unregister(self->pldev);
525
526         /* Remove netdevice */
527         unregister_netdev(self->netdev);
528
529         /* Release the PORT that this driver is using */
530         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", 
531                    __func__, self->io.fir_base);
532         release_region(self->io.fir_base, self->io.fir_ext);
533
534         if (self->tx_buff.head)
535                 dma_free_coherent(NULL, self->tx_buff.truesize,
536                                   self->tx_buff.head, self->tx_buff_dma);
537         
538         if (self->rx_buff.head)
539                 dma_free_coherent(NULL, self->rx_buff.truesize,
540                                   self->rx_buff.head, self->rx_buff_dma);
541
542         dev_self[self->index] = NULL;
543         free_netdev(self->netdev);
544         
545         return 0;
546 }
547
548 /*
549  * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma)
550  *
551  *    Initialize the NSC '108 chip
552  *
553  */
554 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info)
555 {
556         int cfg_base = info->cfg_base;
557         __u8 temp=0;
558
559         outb(2, cfg_base);      /* Mode Control Register (MCTL) */
560         outb(0x00, cfg_base+1); /* Disable device */
561         
562         /* Base Address and Interrupt Control Register (BAIC) */
563         outb(CFG_108_BAIC, cfg_base);
564         switch (info->fir_base) {
565         case 0x3e8: outb(0x14, cfg_base+1); break;
566         case 0x2e8: outb(0x15, cfg_base+1); break;
567         case 0x3f8: outb(0x16, cfg_base+1); break;
568         case 0x2f8: outb(0x17, cfg_base+1); break;
569         default: IRDA_ERROR("%s(), invalid base_address", __func__);
570         }
571         
572         /* Control Signal Routing Register (CSRT) */
573         switch (info->irq) {
574         case 3:  temp = 0x01; break;
575         case 4:  temp = 0x02; break;
576         case 5:  temp = 0x03; break;
577         case 7:  temp = 0x04; break;
578         case 9:  temp = 0x05; break;
579         case 11: temp = 0x06; break;
580         case 15: temp = 0x07; break;
581         default: IRDA_ERROR("%s(), invalid irq", __func__);
582         }
583         outb(CFG_108_CSRT, cfg_base);
584         
585         switch (info->dma) {    
586         case 0: outb(0x08+temp, cfg_base+1); break;
587         case 1: outb(0x10+temp, cfg_base+1); break;
588         case 3: outb(0x18+temp, cfg_base+1); break;
589         default: IRDA_ERROR("%s(), invalid dma", __func__);
590         }
591         
592         outb(CFG_108_MCTL, cfg_base);      /* Mode Control Register (MCTL) */
593         outb(0x03, cfg_base+1); /* Enable device */
594
595         return 0;
596 }
597
598 /*
599  * Function nsc_ircc_probe_108 (chip, info)
600  *
601  *    
602  *
603  */
604 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info) 
605 {
606         int cfg_base = info->cfg_base;
607         int reg;
608
609         /* Read address and interrupt control register (BAIC) */
610         outb(CFG_108_BAIC, cfg_base);
611         reg = inb(cfg_base+1);
612         
613         switch (reg & 0x03) {
614         case 0:
615                 info->fir_base = 0x3e8;
616                 break;
617         case 1:
618                 info->fir_base = 0x2e8;
619                 break;
620         case 2:
621                 info->fir_base = 0x3f8;
622                 break;
623         case 3:
624                 info->fir_base = 0x2f8;
625                 break;
626         }
627         info->sir_base = info->fir_base;
628         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__,
629                    info->fir_base);
630
631         /* Read control signals routing register (CSRT) */
632         outb(CFG_108_CSRT, cfg_base);
633         reg = inb(cfg_base+1);
634
635         switch (reg & 0x07) {
636         case 0:
637                 info->irq = -1;
638                 break;
639         case 1:
640                 info->irq = 3;
641                 break;
642         case 2:
643                 info->irq = 4;
644                 break;
645         case 3:
646                 info->irq = 5;
647                 break;
648         case 4:
649                 info->irq = 7;
650                 break;
651         case 5:
652                 info->irq = 9;
653                 break;
654         case 6:
655                 info->irq = 11;
656                 break;
657         case 7:
658                 info->irq = 15;
659                 break;
660         }
661         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
662
663         /* Currently we only read Rx DMA but it will also be used for Tx */
664         switch ((reg >> 3) & 0x03) {
665         case 0:
666                 info->dma = -1;
667                 break;
668         case 1:
669                 info->dma = 0;
670                 break;
671         case 2:
672                 info->dma = 1;
673                 break;
674         case 3:
675                 info->dma = 3;
676                 break;
677         }
678         IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
679
680         /* Read mode control register (MCTL) */
681         outb(CFG_108_MCTL, cfg_base);
682         reg = inb(cfg_base+1);
683
684         info->enabled = reg & 0x01;
685         info->suspended = !((reg >> 1) & 0x01);
686
687         return 0;
688 }
689
690 /*
691  * Function nsc_ircc_init_338 (chip, info)
692  *
693  *    Initialize the NSC '338 chip. Remember that the 87338 needs two 
694  *    consecutive writes to the data registers while CPU interrupts are
695  *    disabled. The 97338 does not require this, but shouldn't be any
696  *    harm if we do it anyway.
697  */
698 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info) 
699 {
700         /* No init yet */
701         
702         return 0;
703 }
704
705 /*
706  * Function nsc_ircc_probe_338 (chip, info)
707  *
708  *    
709  *
710  */
711 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info) 
712 {
713         int cfg_base = info->cfg_base;
714         int reg, com = 0;
715         int pnp;
716
717         /* Read funtion enable register (FER) */
718         outb(CFG_338_FER, cfg_base);
719         reg = inb(cfg_base+1);
720
721         info->enabled = (reg >> 2) & 0x01;
722
723         /* Check if we are in Legacy or PnP mode */
724         outb(CFG_338_PNP0, cfg_base);
725         reg = inb(cfg_base+1);
726         
727         pnp = (reg >> 3) & 0x01;
728         if (pnp) {
729                 IRDA_DEBUG(2, "(), Chip is in PnP mode\n");
730                 outb(0x46, cfg_base);
731                 reg = (inb(cfg_base+1) & 0xfe) << 2;
732
733                 outb(0x47, cfg_base);
734                 reg |= ((inb(cfg_base+1) & 0xfc) << 8);
735
736                 info->fir_base = reg;
737         } else {
738                 /* Read function address register (FAR) */
739                 outb(CFG_338_FAR, cfg_base);
740                 reg = inb(cfg_base+1);
741                 
742                 switch ((reg >> 4) & 0x03) {
743                 case 0:
744                         info->fir_base = 0x3f8;
745                         break;
746                 case 1:
747                         info->fir_base = 0x2f8;
748                         break;
749                 case 2:
750                         com = 3;
751                         break;
752                 case 3:
753                         com = 4;
754                         break;
755                 }
756                 
757                 if (com) {
758                         switch ((reg >> 6) & 0x03) {
759                         case 0:
760                                 if (com == 3)
761                                         info->fir_base = 0x3e8;
762                                 else
763                                         info->fir_base = 0x2e8;
764                                 break;
765                         case 1:
766                                 if (com == 3)
767                                         info->fir_base = 0x338;
768                                 else
769                                         info->fir_base = 0x238;
770                                 break;
771                         case 2:
772                                 if (com == 3)
773                                         info->fir_base = 0x2e8;
774                                 else
775                                         info->fir_base = 0x2e0;
776                                 break;
777                         case 3:
778                                 if (com == 3)
779                                         info->fir_base = 0x220;
780                                 else
781                                         info->fir_base = 0x228;
782                                 break;
783                         }
784                 }
785         }
786         info->sir_base = info->fir_base;
787
788         /* Read PnP register 1 (PNP1) */
789         outb(CFG_338_PNP1, cfg_base);
790         reg = inb(cfg_base+1);
791         
792         info->irq = reg >> 4;
793         
794         /* Read PnP register 3 (PNP3) */
795         outb(CFG_338_PNP3, cfg_base);
796         reg = inb(cfg_base+1);
797
798         info->dma = (reg & 0x07) - 1;
799
800         /* Read power and test register (PTR) */
801         outb(CFG_338_PTR, cfg_base);
802         reg = inb(cfg_base+1);
803
804         info->suspended = reg & 0x01;
805
806         return 0;
807 }
808
809
810 /*
811  * Function nsc_ircc_init_39x (chip, info)
812  *
813  *    Now that we know it's a '39x (see probe below), we need to
814  *    configure it so we can use it.
815  *
816  * The NSC '338 chip is a Super I/O chip with a "bank" architecture,
817  * the configuration of the different functionality (serial, parallel,
818  * floppy...) are each in a different bank (Logical Device Number).
819  * The base address, irq and dma configuration registers are common
820  * to all functionalities (index 0x30 to 0x7F).
821  * There is only one configuration register specific to the
822  * serial port, CFG_39X_SPC.
823  * JeanII
824  *
825  * Note : this code was written by Jan Frey <janfrey@web.de>
826  */
827 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info) 
828 {
829         int cfg_base = info->cfg_base;
830         int enabled;
831
832         /* User is sure about his config... accept it. */
833         IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): "
834                    "io=0x%04x, irq=%d, dma=%d\n", 
835                    __func__, info->fir_base, info->irq, info->dma);
836
837         /* Access bank for SP2 */
838         outb(CFG_39X_LDN, cfg_base);
839         outb(0x02, cfg_base+1);
840
841         /* Configure SP2 */
842
843         /* We want to enable the device if not enabled */
844         outb(CFG_39X_ACT, cfg_base);
845         enabled = inb(cfg_base+1) & 0x01;
846         
847         if (!enabled) {
848                 /* Enable the device */
849                 outb(CFG_39X_SIOCF1, cfg_base);
850                 outb(0x01, cfg_base+1);
851                 /* May want to update info->enabled. Jean II */
852         }
853
854         /* Enable UART bank switching (bit 7) ; Sets the chip to normal
855          * power mode (wake up from sleep mode) (bit 1) */
856         outb(CFG_39X_SPC, cfg_base);
857         outb(0x82, cfg_base+1);
858
859         return 0;
860 }
861
862 /*
863  * Function nsc_ircc_probe_39x (chip, info)
864  *
865  *    Test if we really have a '39x chip at the given address
866  *
867  * Note : this code was written by Jan Frey <janfrey@web.de>
868  */
869 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info) 
870 {
871         int cfg_base = info->cfg_base;
872         int reg1, reg2, irq, irqt, dma1, dma2;
873         int enabled, susp;
874
875         IRDA_DEBUG(2, "%s(), nsc_ircc_probe_39x, base=%d\n",
876                    __func__, cfg_base);
877
878         /* This function should be executed with irq off to avoid
879          * another driver messing with the Super I/O bank - Jean II */
880
881         /* Access bank for SP2 */
882         outb(CFG_39X_LDN, cfg_base);
883         outb(0x02, cfg_base+1);
884
885         /* Read infos about SP2 ; store in info struct */
886         outb(CFG_39X_BASEH, cfg_base);
887         reg1 = inb(cfg_base+1);
888         outb(CFG_39X_BASEL, cfg_base);
889         reg2 = inb(cfg_base+1);
890         info->fir_base = (reg1 << 8) | reg2;
891
892         outb(CFG_39X_IRQNUM, cfg_base);
893         irq = inb(cfg_base+1);
894         outb(CFG_39X_IRQSEL, cfg_base);
895         irqt = inb(cfg_base+1);
896         info->irq = irq;
897
898         outb(CFG_39X_DMA0, cfg_base);
899         dma1 = inb(cfg_base+1);
900         outb(CFG_39X_DMA1, cfg_base);
901         dma2 = inb(cfg_base+1);
902         info->dma = dma1 -1;
903
904         outb(CFG_39X_ACT, cfg_base);
905         info->enabled = enabled = inb(cfg_base+1) & 0x01;
906         
907         outb(CFG_39X_SPC, cfg_base);
908         susp = 1 - ((inb(cfg_base+1) & 0x02) >> 1);
909
910         IRDA_DEBUG(2, "%s(): io=0x%02x%02x, irq=%d (type %d), rxdma=%d, txdma=%d, enabled=%d (suspended=%d)\n", __func__, reg1,reg2,irq,irqt,dma1,dma2,enabled,susp);
911
912         /* Configure SP2 */
913
914         /* We want to enable the device if not enabled */
915         outb(CFG_39X_ACT, cfg_base);
916         enabled = inb(cfg_base+1) & 0x01;
917         
918         if (!enabled) {
919                 /* Enable the device */
920                 outb(CFG_39X_SIOCF1, cfg_base);
921                 outb(0x01, cfg_base+1);
922                 /* May want to update info->enabled. Jean II */
923         }
924
925         /* Enable UART bank switching (bit 7) ; Sets the chip to normal
926          * power mode (wake up from sleep mode) (bit 1) */
927         outb(CFG_39X_SPC, cfg_base);
928         outb(0x82, cfg_base+1);
929
930         return 0;
931 }
932
933 #ifdef CONFIG_PNP
934 /* PNP probing */
935 static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
936 {
937         memset(&pnp_info, 0, sizeof(chipio_t));
938         pnp_info.irq = -1;
939         pnp_info.dma = -1;
940         pnp_succeeded = 1;
941
942         if (id->driver_data & NSC_FORCE_DONGLE_TYPE9)
943                 dongle_id = 0x9;
944
945         /* There doesn't seem to be any way of getting the cfg_base.
946          * On my box, cfg_base is in the PnP descriptor of the
947          * motherboard. Oh well... Jean II */
948
949         if (pnp_port_valid(dev, 0) &&
950                 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED))
951                 pnp_info.fir_base = pnp_port_start(dev, 0);
952
953         if (pnp_irq_valid(dev, 0) &&
954                 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED))
955                 pnp_info.irq = pnp_irq(dev, 0);
956
957         if (pnp_dma_valid(dev, 0) &&
958                 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED))
959                 pnp_info.dma = pnp_dma(dev, 0);
960
961         IRDA_DEBUG(0, "%s() : From PnP, found firbase 0x%03X ; irq %d ; dma %d.\n",
962                    __func__, pnp_info.fir_base, pnp_info.irq, pnp_info.dma);
963
964         if((pnp_info.fir_base == 0) ||
965            (pnp_info.irq == -1) || (pnp_info.dma == -1)) {
966                 /* Returning an error will disable the device. Yuck ! */
967                 //return -EINVAL;
968                 pnp_succeeded = 0;
969         }
970
971         return 0;
972 }
973 #endif
974
975 /*
976  * Function nsc_ircc_setup (info)
977  *
978  *    Returns non-negative on success.
979  *
980  */
981 static int nsc_ircc_setup(chipio_t *info)
982 {
983         int version;
984         int iobase = info->fir_base;
985
986         /* Read the Module ID */
987         switch_bank(iobase, BANK3);
988         version = inb(iobase+MID);
989
990         IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n",
991                    __func__, driver_name, version);
992
993         /* Should be 0x2? */
994         if (0x20 != (version & 0xf0)) {
995                 IRDA_ERROR("%s, Wrong chip version %02x\n",
996                            driver_name, version);
997                 return -1;
998         }
999
1000         /* Switch to advanced mode */
1001         switch_bank(iobase, BANK2);
1002         outb(ECR1_EXT_SL, iobase+ECR1);
1003         switch_bank(iobase, BANK0);
1004         
1005         /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
1006         switch_bank(iobase, BANK0);
1007         outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1008
1009         outb(0x03, iobase+LCR);         /* 8 bit word length */
1010         outb(MCR_SIR, iobase+MCR);      /* Start at SIR-mode, also clears LSR*/
1011
1012         /* Set FIFO size to 32 */
1013         switch_bank(iobase, BANK2);
1014         outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1015
1016         /* IRCR2: FEND_MD is not set */
1017         switch_bank(iobase, BANK5);
1018         outb(0x02, iobase+4);
1019
1020         /* Make sure that some defaults are OK */
1021         switch_bank(iobase, BANK6);
1022         outb(0x20, iobase+0); /* Set 32 bits FIR CRC */
1023         outb(0x0a, iobase+1); /* Set MIR pulse width */
1024         outb(0x0d, iobase+2); /* Set SIR pulse width to 1.6us */
1025         outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */
1026
1027         /* Enable receive interrupts */
1028         switch_bank(iobase, BANK0);
1029         outb(IER_RXHDL_IE, iobase+IER);
1030
1031         return 0;
1032 }
1033
1034 /*
1035  * Function nsc_ircc_read_dongle_id (void)
1036  *
1037  * Try to read dongle indentification. This procedure needs to be executed
1038  * once after power-on/reset. It also needs to be used whenever you suspect
1039  * that the user may have plugged/unplugged the IrDA Dongle.
1040  */
1041 static int nsc_ircc_read_dongle_id (int iobase)
1042 {
1043         int dongle_id;
1044         __u8 bank;
1045
1046         bank = inb(iobase+BSR);
1047
1048         /* Select Bank 7 */
1049         switch_bank(iobase, BANK7);
1050         
1051         /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
1052         outb(0x00, iobase+7);
1053         
1054         /* ID0, 1, and 2 are pulled up/down very slowly */
1055         udelay(50);
1056         
1057         /* IRCFG1: read the ID bits */
1058         dongle_id = inb(iobase+4) & 0x0f;
1059
1060 #ifdef BROKEN_DONGLE_ID
1061         if (dongle_id == 0x0a)
1062                 dongle_id = 0x09;
1063 #endif  
1064         /* Go back to  bank 0 before returning */
1065         switch_bank(iobase, BANK0);
1066
1067         outb(bank, iobase+BSR);
1068
1069         return dongle_id;
1070 }
1071
1072 /*
1073  * Function nsc_ircc_init_dongle_interface (iobase, dongle_id)
1074  *
1075  *     This function initializes the dongle for the transceiver that is
1076  *     used. This procedure needs to be executed once after
1077  *     power-on/reset. It also needs to be used whenever you suspect that
1078  *     the dongle is changed. 
1079  */
1080 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id)
1081 {
1082         int bank;
1083
1084         /* Save current bank */
1085         bank = inb(iobase+BSR);
1086
1087         /* Select Bank 7 */
1088         switch_bank(iobase, BANK7);
1089         
1090         /* IRCFG4: set according to dongle_id */
1091         switch (dongle_id) {
1092         case 0x00: /* same as */
1093         case 0x01: /* Differential serial interface */
1094                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1095                            __func__, dongle_types[dongle_id]);
1096                 break;
1097         case 0x02: /* same as */
1098         case 0x03: /* Reserved */
1099                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1100                            __func__, dongle_types[dongle_id]);
1101                 break;
1102         case 0x04: /* Sharp RY5HD01 */
1103                 break;
1104         case 0x05: /* Reserved, but this is what the Thinkpad reports */
1105                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1106                            __func__, dongle_types[dongle_id]);
1107                 break;
1108         case 0x06: /* Single-ended serial interface */
1109                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1110                            __func__, dongle_types[dongle_id]);
1111                 break;
1112         case 0x07: /* Consumer-IR only */
1113                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1114                            __func__, dongle_types[dongle_id]);
1115                 break;
1116         case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1117                 IRDA_DEBUG(0, "%s(), %s\n",
1118                            __func__, dongle_types[dongle_id]);
1119                 break;
1120         case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1121                 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
1122                 break;
1123         case 0x0A: /* same as */
1124         case 0x0B: /* Reserved */
1125                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1126                            __func__, dongle_types[dongle_id]);
1127                 break;
1128         case 0x0C: /* same as */
1129         case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1130                 /* 
1131                  * Set irsl0 as input, irsl[1-2] as output, and separate 
1132                  * inputs are used for SIR and MIR/FIR 
1133                  */
1134                 outb(0x48, iobase+7); 
1135                 break;
1136         case 0x0E: /* Supports SIR Mode only */
1137                 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
1138                 break;
1139         case 0x0F: /* No dongle connected */
1140                 IRDA_DEBUG(0, "%s(), %s\n",
1141                            __func__, dongle_types[dongle_id]);
1142
1143                 switch_bank(iobase, BANK0);
1144                 outb(0x62, iobase+MCR);
1145                 break;
1146         default: 
1147                 IRDA_DEBUG(0, "%s(), invalid dongle_id %#x", 
1148                            __func__, dongle_id);
1149         }
1150         
1151         /* IRCFG1: IRSL1 and 2 are set to IrDA mode */
1152         outb(0x00, iobase+4);
1153
1154         /* Restore bank register */
1155         outb(bank, iobase+BSR);
1156         
1157 } /* set_up_dongle_interface */
1158
1159 /*
1160  * Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id)
1161  *
1162  *    Change speed of the attach dongle
1163  *
1164  */
1165 static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id)
1166 {
1167         __u8 bank;
1168
1169         /* Save current bank */
1170         bank = inb(iobase+BSR);
1171
1172         /* Select Bank 7 */
1173         switch_bank(iobase, BANK7);
1174         
1175         /* IRCFG1: set according to dongle_id */
1176         switch (dongle_id) {
1177         case 0x00: /* same as */
1178         case 0x01: /* Differential serial interface */
1179                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1180                            __func__, dongle_types[dongle_id]);
1181                 break;
1182         case 0x02: /* same as */
1183         case 0x03: /* Reserved */
1184                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1185                            __func__, dongle_types[dongle_id]);
1186                 break;
1187         case 0x04: /* Sharp RY5HD01 */
1188                 break;
1189         case 0x05: /* Reserved */
1190                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1191                            __func__, dongle_types[dongle_id]);
1192                 break;
1193         case 0x06: /* Single-ended serial interface */
1194                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1195                            __func__, dongle_types[dongle_id]);
1196                 break;
1197         case 0x07: /* Consumer-IR only */
1198                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1199                            __func__, dongle_types[dongle_id]);
1200                 break;
1201         case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1202                 IRDA_DEBUG(0, "%s(), %s\n", 
1203                            __func__, dongle_types[dongle_id]);
1204                 outb(0x00, iobase+4);
1205                 if (speed > 115200)
1206                         outb(0x01, iobase+4);
1207                 break;
1208         case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1209                 outb(0x01, iobase+4);
1210
1211                 if (speed == 4000000) {
1212                         /* There was a cli() there, but we now are already
1213                          * under spin_lock_irqsave() - JeanII */
1214                         outb(0x81, iobase+4);
1215                         outb(0x80, iobase+4);
1216                 } else
1217                         outb(0x00, iobase+4);
1218                 break;
1219         case 0x0A: /* same as */
1220         case 0x0B: /* Reserved */
1221                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1222                            __func__, dongle_types[dongle_id]);
1223                 break;
1224         case 0x0C: /* same as */
1225         case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1226                 break;
1227         case 0x0E: /* Supports SIR Mode only */
1228                 break;
1229         case 0x0F: /* No dongle connected */
1230                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1231                            __func__, dongle_types[dongle_id]);
1232
1233                 switch_bank(iobase, BANK0); 
1234                 outb(0x62, iobase+MCR);
1235                 break;
1236         default: 
1237                 IRDA_DEBUG(0, "%s(), invalid data_rate\n", __func__);
1238         }
1239         /* Restore bank register */
1240         outb(bank, iobase+BSR);
1241 }
1242
1243 /*
1244  * Function nsc_ircc_change_speed (self, baud)
1245  *
1246  *    Change the speed of the device
1247  *
1248  * This function *must* be called with irq off and spin-lock.
1249  */
1250 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
1251 {
1252         struct net_device *dev = self->netdev;
1253         __u8 mcr = MCR_SIR;
1254         int iobase; 
1255         __u8 bank;
1256         __u8 ier;                  /* Interrupt enable register */
1257
1258         IRDA_DEBUG(2, "%s(), speed=%d\n", __func__, speed);
1259
1260         IRDA_ASSERT(self != NULL, return 0;);
1261
1262         iobase = self->io.fir_base;
1263
1264         /* Update accounting for new speed */
1265         self->io.speed = speed;
1266
1267         /* Save current bank */
1268         bank = inb(iobase+BSR);
1269
1270         /* Disable interrupts */
1271         switch_bank(iobase, BANK0);
1272         outb(0, iobase+IER);
1273
1274         /* Select Bank 2 */
1275         switch_bank(iobase, BANK2);
1276
1277         outb(0x00, iobase+BGDH);
1278         switch (speed) {
1279         case 9600:   outb(0x0c, iobase+BGDL); break;
1280         case 19200:  outb(0x06, iobase+BGDL); break;
1281         case 38400:  outb(0x03, iobase+BGDL); break;
1282         case 57600:  outb(0x02, iobase+BGDL); break;
1283         case 115200: outb(0x01, iobase+BGDL); break;
1284         case 576000:
1285                 switch_bank(iobase, BANK5);
1286                 
1287                 /* IRCR2: MDRS is set */
1288                 outb(inb(iobase+4) | 0x04, iobase+4);
1289                
1290                 mcr = MCR_MIR;
1291                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
1292                 break;
1293         case 1152000:
1294                 mcr = MCR_MIR;
1295                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__);
1296                 break;
1297         case 4000000:
1298                 mcr = MCR_FIR;
1299                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__);
1300                 break;
1301         default:
1302                 mcr = MCR_FIR;
1303                 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", 
1304                            __func__, speed);
1305                 break;
1306         }
1307
1308         /* Set appropriate speed mode */
1309         switch_bank(iobase, BANK0);
1310         outb(mcr | MCR_TX_DFR, iobase+MCR);
1311
1312         /* Give some hits to the transceiver */
1313         nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
1314
1315         /* Set FIFO threshold to TX17, RX16 */
1316         switch_bank(iobase, BANK0);
1317         outb(0x00, iobase+FCR);
1318         outb(FCR_FIFO_EN, iobase+FCR);
1319         outb(FCR_RXTH|     /* Set Rx FIFO threshold */
1320              FCR_TXTH|     /* Set Tx FIFO threshold */
1321              FCR_TXSR|     /* Reset Tx FIFO */
1322              FCR_RXSR|     /* Reset Rx FIFO */
1323              FCR_FIFO_EN,  /* Enable FIFOs */
1324              iobase+FCR);
1325         
1326         /* Set FIFO size to 32 */
1327         switch_bank(iobase, BANK2);
1328         outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1329         
1330         /* Enable some interrupts so we can receive frames */
1331         switch_bank(iobase, BANK0); 
1332         if (speed > 115200) {
1333                 /* Install FIR xmit handler */
1334                 dev->netdev_ops = &nsc_ircc_fir_ops;
1335                 ier = IER_SFIF_IE;
1336                 nsc_ircc_dma_receive(self);
1337         } else {
1338                 /* Install SIR xmit handler */
1339                 dev->netdev_ops = &nsc_ircc_sir_ops;
1340                 ier = IER_RXHDL_IE;
1341         }
1342         /* Set our current interrupt mask */
1343         outb(ier, iobase+IER);
1344         
1345         /* Restore BSR */
1346         outb(bank, iobase+BSR);
1347
1348         /* Make sure interrupt handlers keep the proper interrupt mask */
1349         return(ier);
1350 }
1351
1352 /*
1353  * Function nsc_ircc_hard_xmit (skb, dev)
1354  *
1355  *    Transmit the frame!
1356  *
1357  */
1358 static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
1359 {
1360         struct nsc_ircc_cb *self;
1361         unsigned long flags;
1362         int iobase;
1363         __s32 speed;
1364         __u8 bank;
1365         
1366         self = netdev_priv(dev);
1367
1368         IRDA_ASSERT(self != NULL, return 0;);
1369
1370         iobase = self->io.fir_base;
1371
1372         netif_stop_queue(dev);
1373                 
1374         /* Make sure tests *& speed change are atomic */
1375         spin_lock_irqsave(&self->lock, flags);
1376         
1377         /* Check if we need to change the speed */
1378         speed = irda_get_next_speed(skb);
1379         if ((speed != self->io.speed) && (speed != -1)) {
1380                 /* Check for empty frame. */
1381                 if (!skb->len) {
1382                         /* If we just sent a frame, we get called before
1383                          * the last bytes get out (because of the SIR FIFO).
1384                          * If this is the case, let interrupt handler change
1385                          * the speed itself... Jean II */
1386                         if (self->io.direction == IO_RECV) {
1387                                 nsc_ircc_change_speed(self, speed); 
1388                                 /* TODO : For SIR->SIR, the next packet
1389                                  * may get corrupted - Jean II */
1390                                 netif_wake_queue(dev);
1391                         } else {
1392                                 self->new_speed = speed;
1393                                 /* Queue will be restarted after speed change
1394                                  * to make sure packets gets through the
1395                                  * proper xmit handler - Jean II */
1396                         }
1397                         dev->trans_start = jiffies;
1398                         spin_unlock_irqrestore(&self->lock, flags);
1399                         dev_kfree_skb(skb);
1400                         return 0;
1401                 } else
1402                         self->new_speed = speed;
1403         }
1404
1405         /* Save current bank */
1406         bank = inb(iobase+BSR);
1407         
1408         self->tx_buff.data = self->tx_buff.head;
1409         
1410         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, 
1411                                            self->tx_buff.truesize);
1412
1413         dev->stats.tx_bytes += self->tx_buff.len;
1414         
1415         /* Add interrupt on tx low level (will fire immediately) */
1416         switch_bank(iobase, BANK0);
1417         outb(IER_TXLDL_IE, iobase+IER);
1418         
1419         /* Restore bank register */
1420         outb(bank, iobase+BSR);
1421
1422         dev->trans_start = jiffies;
1423         spin_unlock_irqrestore(&self->lock, flags);
1424
1425         dev_kfree_skb(skb);
1426
1427         return 0;
1428 }
1429
1430 static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1431 {
1432         struct nsc_ircc_cb *self;
1433         unsigned long flags;
1434         int iobase;
1435         __s32 speed;
1436         __u8 bank;
1437         int mtt, diff;
1438         
1439         self = netdev_priv(dev);
1440         iobase = self->io.fir_base;
1441
1442         netif_stop_queue(dev);
1443         
1444         /* Make sure tests *& speed change are atomic */
1445         spin_lock_irqsave(&self->lock, flags);
1446
1447         /* Check if we need to change the speed */
1448         speed = irda_get_next_speed(skb);
1449         if ((speed != self->io.speed) && (speed != -1)) {
1450                 /* Check for empty frame. */
1451                 if (!skb->len) {
1452                         /* If we are currently transmitting, defer to
1453                          * interrupt handler. - Jean II */
1454                         if(self->tx_fifo.len == 0) {
1455                                 nsc_ircc_change_speed(self, speed); 
1456                                 netif_wake_queue(dev);
1457                         } else {
1458                                 self->new_speed = speed;
1459                                 /* Keep queue stopped :
1460                                  * the speed change operation may change the
1461                                  * xmit handler, and we want to make sure
1462                                  * the next packet get through the proper
1463                                  * Tx path, so block the Tx queue until
1464                                  * the speed change has been done.
1465                                  * Jean II */
1466                         }
1467                         dev->trans_start = jiffies;
1468                         spin_unlock_irqrestore(&self->lock, flags);
1469                         dev_kfree_skb(skb);
1470                         return 0;
1471                 } else {
1472                         /* Change speed after current frame */
1473                         self->new_speed = speed;
1474                 }
1475         }
1476
1477         /* Save current bank */
1478         bank = inb(iobase+BSR);
1479
1480         /* Register and copy this frame to DMA memory */
1481         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1482         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1483         self->tx_fifo.tail += skb->len;
1484
1485         dev->stats.tx_bytes += skb->len;
1486
1487         skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1488                       skb->len);
1489         self->tx_fifo.len++;
1490         self->tx_fifo.free++;
1491
1492         /* Start transmit only if there is currently no transmit going on */
1493         if (self->tx_fifo.len == 1) {
1494                 /* Check if we must wait the min turn time or not */
1495                 mtt = irda_get_mtt(skb);
1496                 if (mtt) {
1497                         /* Check how much time we have used already */
1498                         do_gettimeofday(&self->now);
1499                         diff = self->now.tv_usec - self->stamp.tv_usec;
1500                         if (diff < 0) 
1501                                 diff += 1000000;
1502                         
1503                         /* Check if the mtt is larger than the time we have
1504                          * already used by all the protocol processing
1505                          */
1506                         if (mtt > diff) {
1507                                 mtt -= diff;
1508
1509                                 /* 
1510                                  * Use timer if delay larger than 125 us, and
1511                                  * use udelay for smaller values which should
1512                                  * be acceptable
1513                                  */
1514                                 if (mtt > 125) {
1515                                         /* Adjust for timer resolution */
1516                                         mtt = mtt / 125;
1517                                         
1518                                         /* Setup timer */
1519                                         switch_bank(iobase, BANK4);
1520                                         outb(mtt & 0xff, iobase+TMRL);
1521                                         outb((mtt >> 8) & 0x0f, iobase+TMRH);
1522                                         
1523                                         /* Start timer */
1524                                         outb(IRCR1_TMR_EN, iobase+IRCR1);
1525                                         self->io.direction = IO_XMIT;
1526                                         
1527                                         /* Enable timer interrupt */
1528                                         switch_bank(iobase, BANK0);
1529                                         outb(IER_TMR_IE, iobase+IER);
1530                                         
1531                                         /* Timer will take care of the rest */
1532                                         goto out; 
1533                                 } else
1534                                         udelay(mtt);
1535                         }
1536                 }               
1537                 /* Enable DMA interrupt */
1538                 switch_bank(iobase, BANK0);
1539                 outb(IER_DMA_IE, iobase+IER);
1540
1541                 /* Transmit frame */
1542                 nsc_ircc_dma_xmit(self, iobase);
1543         }
1544  out:
1545         /* Not busy transmitting anymore if window is not full,
1546          * and if we don't need to change speed */
1547         if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0))
1548                 netif_wake_queue(self->netdev);
1549
1550         /* Restore bank register */
1551         outb(bank, iobase+BSR);
1552
1553         dev->trans_start = jiffies;
1554         spin_unlock_irqrestore(&self->lock, flags);
1555         dev_kfree_skb(skb);
1556
1557         return 0;
1558 }
1559
1560 /*
1561  * Function nsc_ircc_dma_xmit (self, iobase)
1562  *
1563  *    Transmit data using DMA
1564  *
1565  */
1566 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase)
1567 {
1568         int bsr;
1569
1570         /* Save current bank */
1571         bsr = inb(iobase+BSR);
1572
1573         /* Disable DMA */
1574         switch_bank(iobase, BANK0);
1575         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1576         
1577         self->io.direction = IO_XMIT;
1578         
1579         /* Choose transmit DMA channel  */ 
1580         switch_bank(iobase, BANK2);
1581         outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1582         
1583         irda_setup_dma(self->io.dma, 
1584                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1585                         self->tx_buff.head) + self->tx_buff_dma,
1586                        self->tx_fifo.queue[self->tx_fifo.ptr].len, 
1587                        DMA_TX_MODE);
1588
1589         /* Enable DMA and SIR interaction pulse */
1590         switch_bank(iobase, BANK0);     
1591         outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR);
1592
1593         /* Restore bank register */
1594         outb(bsr, iobase+BSR);
1595 }
1596
1597 /*
1598  * Function nsc_ircc_pio_xmit (self, iobase)
1599  *
1600  *    Transmit data using PIO. Returns the number of bytes that actually
1601  *    got transferred
1602  *
1603  */
1604 static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
1605 {
1606         int actual = 0;
1607         __u8 bank;
1608         
1609         IRDA_DEBUG(4, "%s()\n", __func__);
1610
1611         /* Save current bank */
1612         bank = inb(iobase+BSR);
1613
1614         switch_bank(iobase, BANK0);
1615         if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
1616                 IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n",
1617                            __func__);
1618
1619                 /* FIFO may still be filled to the Tx interrupt threshold */
1620                 fifo_size -= 17;
1621         }
1622
1623         /* Fill FIFO with current frame */
1624         while ((fifo_size-- > 0) && (actual < len)) {
1625                 /* Transmit next byte */
1626                 outb(buf[actual++], iobase+TXD);
1627         }
1628         
1629         IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n", 
1630                    __func__, fifo_size, actual, len);
1631         
1632         /* Restore bank */
1633         outb(bank, iobase+BSR);
1634
1635         return actual;
1636 }
1637
1638 /*
1639  * Function nsc_ircc_dma_xmit_complete (self)
1640  *
1641  *    The transfer of a frame in finished. This function will only be called 
1642  *    by the interrupt handler
1643  *
1644  */
1645 static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self)
1646 {
1647         int iobase;
1648         __u8 bank;
1649         int ret = TRUE;
1650
1651         IRDA_DEBUG(2, "%s()\n", __func__);
1652
1653         iobase = self->io.fir_base;
1654
1655         /* Save current bank */
1656         bank = inb(iobase+BSR);
1657
1658         /* Disable DMA */
1659         switch_bank(iobase, BANK0);
1660         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1661         
1662         /* Check for underrrun! */
1663         if (inb(iobase+ASCR) & ASCR_TXUR) {
1664                 self->netdev->stats.tx_errors++;
1665                 self->netdev->stats.tx_fifo_errors++;
1666                 
1667                 /* Clear bit, by writing 1 into it */
1668                 outb(ASCR_TXUR, iobase+ASCR);
1669         } else {
1670                 self->netdev->stats.tx_packets++;
1671         }
1672
1673         /* Finished with this frame, so prepare for next */
1674         self->tx_fifo.ptr++;
1675         self->tx_fifo.len--;
1676
1677         /* Any frames to be sent back-to-back? */
1678         if (self->tx_fifo.len) {
1679                 nsc_ircc_dma_xmit(self, iobase);
1680                 
1681                 /* Not finished yet! */
1682                 ret = FALSE;
1683         } else {
1684                 /* Reset Tx FIFO info */
1685                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1686                 self->tx_fifo.tail = self->tx_buff.head;
1687         }
1688
1689         /* Make sure we have room for more frames and
1690          * that we don't need to change speed */
1691         if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) {
1692                 /* Not busy transmitting anymore */
1693                 /* Tell the network layer, that we can accept more frames */
1694                 netif_wake_queue(self->netdev);
1695         }
1696
1697         /* Restore bank */
1698         outb(bank, iobase+BSR);
1699         
1700         return ret;
1701 }
1702
1703 /*
1704  * Function nsc_ircc_dma_receive (self)
1705  *
1706  *    Get ready for receiving a frame. The device will initiate a DMA
1707  *    if it starts to receive a frame.
1708  *
1709  */
1710 static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self) 
1711 {
1712         int iobase;
1713         __u8 bsr;
1714
1715         iobase = self->io.fir_base;
1716
1717         /* Reset Tx FIFO info */
1718         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1719         self->tx_fifo.tail = self->tx_buff.head;
1720
1721         /* Save current bank */
1722         bsr = inb(iobase+BSR);
1723
1724         /* Disable DMA */
1725         switch_bank(iobase, BANK0);
1726         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1727
1728         /* Choose DMA Rx, DMA Fairness, and Advanced mode */
1729         switch_bank(iobase, BANK2);
1730         outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1731
1732         self->io.direction = IO_RECV;
1733         self->rx_buff.data = self->rx_buff.head;
1734         
1735         /* Reset Rx FIFO. This will also flush the ST_FIFO */
1736         switch_bank(iobase, BANK0);
1737         outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1738
1739         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1740         self->st_fifo.tail = self->st_fifo.head = 0;
1741         
1742         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1743                        DMA_RX_MODE);
1744
1745         /* Enable DMA */
1746         switch_bank(iobase, BANK0);
1747         outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR);
1748
1749         /* Restore bank register */
1750         outb(bsr, iobase+BSR);
1751         
1752         return 0;
1753 }
1754
1755 /*
1756  * Function nsc_ircc_dma_receive_complete (self)
1757  *
1758  *    Finished with receiving frames
1759  *
1760  *    
1761  */
1762 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase)
1763 {
1764         struct st_fifo *st_fifo;
1765         struct sk_buff *skb;
1766         __u8 status;
1767         __u8 bank;
1768         int len;
1769
1770         st_fifo = &self->st_fifo;
1771
1772         /* Save current bank */
1773         bank = inb(iobase+BSR);
1774         
1775         /* Read all entries in status FIFO */
1776         switch_bank(iobase, BANK5);
1777         while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) {
1778                 /* We must empty the status FIFO no matter what */
1779                 len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8);
1780
1781                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1782                         IRDA_DEBUG(0, "%s(), window is full!\n", __func__);
1783                         continue;
1784                 }
1785                         
1786                 st_fifo->entries[st_fifo->tail].status = status;
1787                 st_fifo->entries[st_fifo->tail].len = len;
1788                 st_fifo->pending_bytes += len;
1789                 st_fifo->tail++;
1790                 st_fifo->len++;
1791         }
1792         /* Try to process all entries in status FIFO */
1793         while (st_fifo->len > 0) {
1794                 /* Get first entry */
1795                 status = st_fifo->entries[st_fifo->head].status;
1796                 len    = st_fifo->entries[st_fifo->head].len;
1797                 st_fifo->pending_bytes -= len;
1798                 st_fifo->head++;
1799                 st_fifo->len--;
1800
1801                 /* Check for errors */
1802                 if (status & FRM_ST_ERR_MSK) {
1803                         if (status & FRM_ST_LOST_FR) {
1804                                 /* Add number of lost frames to stats */
1805                                 self->netdev->stats.rx_errors += len;
1806                         } else {
1807                                 /* Skip frame */
1808                                 self->netdev->stats.rx_errors++;
1809                                 
1810                                 self->rx_buff.data += len;
1811                         
1812                                 if (status & FRM_ST_MAX_LEN)
1813                                         self->netdev->stats.rx_length_errors++;
1814                                 
1815                                 if (status & FRM_ST_PHY_ERR) 
1816                                         self->netdev->stats.rx_frame_errors++;
1817                                 
1818                                 if (status & FRM_ST_BAD_CRC) 
1819                                         self->netdev->stats.rx_crc_errors++;
1820                         }
1821                         /* The errors below can be reported in both cases */
1822                         if (status & FRM_ST_OVR1)
1823                                 self->netdev->stats.rx_fifo_errors++;
1824                         
1825                         if (status & FRM_ST_OVR2)
1826                                 self->netdev->stats.rx_fifo_errors++;
1827                 } else {
1828                         /*  
1829                          * First we must make sure that the frame we
1830                          * want to deliver is all in main memory. If we
1831                          * cannot tell, then we check if the Rx FIFO is
1832                          * empty. If not then we will have to take a nap
1833                          * and try again later.  
1834                          */
1835                         if (st_fifo->pending_bytes < self->io.fifo_size) {
1836                                 switch_bank(iobase, BANK0);
1837                                 if (inb(iobase+LSR) & LSR_RXDA) {
1838                                         /* Put this entry back in fifo */
1839                                         st_fifo->head--;
1840                                         st_fifo->len++;
1841                                         st_fifo->pending_bytes += len;
1842                                         st_fifo->entries[st_fifo->head].status = status;
1843                                         st_fifo->entries[st_fifo->head].len = len;
1844                                         /*  
1845                                          * DMA not finished yet, so try again 
1846                                          * later, set timer value, resolution 
1847                                          * 125 us 
1848                                          */
1849                                         switch_bank(iobase, BANK4);
1850                                         outb(0x02, iobase+TMRL); /* x 125 us */
1851                                         outb(0x00, iobase+TMRH);
1852
1853                                         /* Start timer */
1854                                         outb(IRCR1_TMR_EN, iobase+IRCR1);
1855
1856                                         /* Restore bank register */
1857                                         outb(bank, iobase+BSR);
1858                                         
1859                                         return FALSE; /* I'll be back! */
1860                                 }
1861                         }
1862
1863                         /* 
1864                          * Remember the time we received this frame, so we can
1865                          * reduce the min turn time a bit since we will know
1866                          * how much time we have used for protocol processing
1867                          */
1868                         do_gettimeofday(&self->stamp);
1869
1870                         skb = dev_alloc_skb(len+1);
1871                         if (skb == NULL)  {
1872                                 IRDA_WARNING("%s(), memory squeeze, "
1873                                              "dropping frame.\n",
1874                                              __func__);
1875                                 self->netdev->stats.rx_dropped++;
1876
1877                                 /* Restore bank register */
1878                                 outb(bank, iobase+BSR);
1879
1880                                 return FALSE;
1881                         }
1882                         
1883                         /* Make sure IP header gets aligned */
1884                         skb_reserve(skb, 1); 
1885
1886                         /* Copy frame without CRC */
1887                         if (self->io.speed < 4000000) {
1888                                 skb_put(skb, len-2);
1889                                 skb_copy_to_linear_data(skb,
1890                                                         self->rx_buff.data,
1891                                                         len - 2);
1892                         } else {
1893                                 skb_put(skb, len-4);
1894                                 skb_copy_to_linear_data(skb,
1895                                                         self->rx_buff.data,
1896                                                         len - 4);
1897                         }
1898
1899                         /* Move to next frame */
1900                         self->rx_buff.data += len;
1901                         self->netdev->stats.rx_bytes += len;
1902                         self->netdev->stats.rx_packets++;
1903
1904                         skb->dev = self->netdev;
1905                         skb_reset_mac_header(skb);
1906                         skb->protocol = htons(ETH_P_IRDA);
1907                         netif_rx(skb);
1908                 }
1909         }
1910         /* Restore bank register */
1911         outb(bank, iobase+BSR);
1912
1913         return TRUE;
1914 }
1915
1916 /*
1917  * Function nsc_ircc_pio_receive (self)
1918  *
1919  *    Receive all data in receiver FIFO
1920  *
1921  */
1922 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self) 
1923 {
1924         __u8 byte;
1925         int iobase;
1926
1927         iobase = self->io.fir_base;
1928         
1929         /*  Receive all characters in Rx FIFO */
1930         do {
1931                 byte = inb(iobase+RXD);
1932                 async_unwrap_char(self->netdev, &self->netdev->stats,
1933                                   &self->rx_buff, byte);
1934         } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */      
1935 }
1936
1937 /*
1938  * Function nsc_ircc_sir_interrupt (self, eir)
1939  *
1940  *    Handle SIR interrupt
1941  *
1942  */
1943 static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir)
1944 {
1945         int actual;
1946
1947         /* Check if transmit FIFO is low on data */
1948         if (eir & EIR_TXLDL_EV) {
1949                 /* Write data left in transmit buffer */
1950                 actual = nsc_ircc_pio_write(self->io.fir_base, 
1951                                            self->tx_buff.data, 
1952                                            self->tx_buff.len, 
1953                                            self->io.fifo_size);
1954                 self->tx_buff.data += actual;
1955                 self->tx_buff.len  -= actual;
1956                 
1957                 self->io.direction = IO_XMIT;
1958
1959                 /* Check if finished */
1960                 if (self->tx_buff.len > 0)
1961                         self->ier = IER_TXLDL_IE;
1962                 else { 
1963
1964                         self->netdev->stats.tx_packets++;
1965                         netif_wake_queue(self->netdev);
1966                         self->ier = IER_TXEMP_IE;
1967                 }
1968                         
1969         }
1970         /* Check if transmission has completed */
1971         if (eir & EIR_TXEMP_EV) {
1972                 /* Turn around and get ready to receive some data */
1973                 self->io.direction = IO_RECV;
1974                 self->ier = IER_RXHDL_IE;
1975                 /* Check if we need to change the speed?
1976                  * Need to be after self->io.direction to avoid race with
1977                  * nsc_ircc_hard_xmit_sir() - Jean II */
1978                 if (self->new_speed) {
1979                         IRDA_DEBUG(2, "%s(), Changing speed!\n", __func__);
1980                         self->ier = nsc_ircc_change_speed(self,
1981                                                           self->new_speed);
1982                         self->new_speed = 0;
1983                         netif_wake_queue(self->netdev);
1984
1985                         /* Check if we are going to FIR */
1986                         if (self->io.speed > 115200) {
1987                                 /* No need to do anymore SIR stuff */
1988                                 return;
1989                         }
1990                 }
1991         }
1992
1993         /* Rx FIFO threshold or timeout */
1994         if (eir & EIR_RXHDL_EV) {
1995                 nsc_ircc_pio_receive(self);
1996
1997                 /* Keep receiving */
1998                 self->ier = IER_RXHDL_IE;
1999         }
2000 }
2001
2002 /*
2003  * Function nsc_ircc_fir_interrupt (self, eir)
2004  *
2005  *    Handle MIR/FIR interrupt
2006  *
2007  */
2008 static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase, 
2009                                    int eir)
2010 {
2011         __u8 bank;
2012
2013         bank = inb(iobase+BSR);
2014         
2015         /* Status FIFO event*/
2016         if (eir & EIR_SFIF_EV) {
2017                 /* Check if DMA has finished */
2018                 if (nsc_ircc_dma_receive_complete(self, iobase)) {
2019                         /* Wait for next status FIFO interrupt */
2020                         self->ier = IER_SFIF_IE;
2021                 } else {
2022                         self->ier = IER_SFIF_IE | IER_TMR_IE;
2023                 }
2024         } else if (eir & EIR_TMR_EV) { /* Timer finished */
2025                 /* Disable timer */
2026                 switch_bank(iobase, BANK4);
2027                 outb(0, iobase+IRCR1);
2028
2029                 /* Clear timer event */
2030                 switch_bank(iobase, BANK0);
2031                 outb(ASCR_CTE, iobase+ASCR);
2032
2033                 /* Check if this is a Tx timer interrupt */
2034                 if (self->io.direction == IO_XMIT) {
2035                         nsc_ircc_dma_xmit(self, iobase);
2036
2037                         /* Interrupt on DMA */
2038                         self->ier = IER_DMA_IE;
2039                 } else {
2040                         /* Check (again) if DMA has finished */
2041                         if (nsc_ircc_dma_receive_complete(self, iobase)) {
2042                                 self->ier = IER_SFIF_IE;
2043                         } else {
2044                                 self->ier = IER_SFIF_IE | IER_TMR_IE;
2045                         }
2046                 }
2047         } else if (eir & EIR_DMA_EV) {
2048                 /* Finished with all transmissions? */
2049                 if (nsc_ircc_dma_xmit_complete(self)) {
2050                         if(self->new_speed != 0) {
2051                                 /* As we stop the Tx queue, the speed change
2052                                  * need to be done when the Tx fifo is
2053                                  * empty. Ask for a Tx done interrupt */
2054                                 self->ier = IER_TXEMP_IE;
2055                         } else {
2056                                 /* Check if there are more frames to be
2057                                  * transmitted */
2058                                 if (irda_device_txqueue_empty(self->netdev)) {
2059                                         /* Prepare for receive */
2060                                         nsc_ircc_dma_receive(self);
2061                                         self->ier = IER_SFIF_IE;
2062                                 } else
2063                                         IRDA_WARNING("%s(), potential "
2064                                                      "Tx queue lockup !\n",
2065                                                      __func__);
2066                         }
2067                 } else {
2068                         /*  Not finished yet, so interrupt on DMA again */
2069                         self->ier = IER_DMA_IE;
2070                 }
2071         } else if (eir & EIR_TXEMP_EV) {
2072                 /* The Tx FIFO has totally drained out, so now we can change
2073                  * the speed... - Jean II */
2074                 self->ier = nsc_ircc_change_speed(self, self->new_speed);
2075                 self->new_speed = 0;
2076                 netif_wake_queue(self->netdev);
2077                 /* Note : nsc_ircc_change_speed() restarted Rx fifo */
2078         }
2079
2080         outb(bank, iobase+BSR);
2081 }
2082
2083 /*
2084  * Function nsc_ircc_interrupt (irq, dev_id, regs)
2085  *
2086  *    An interrupt from the chip has arrived. Time to do some work
2087  *
2088  */
2089 static irqreturn_t nsc_ircc_interrupt(int irq, void *dev_id)
2090 {
2091         struct net_device *dev = dev_id;
2092         struct nsc_ircc_cb *self;
2093         __u8 bsr, eir;
2094         int iobase;
2095
2096         self = netdev_priv(dev);
2097
2098         spin_lock(&self->lock); 
2099
2100         iobase = self->io.fir_base;
2101
2102         bsr = inb(iobase+BSR);  /* Save current bank */
2103
2104         switch_bank(iobase, BANK0);     
2105         self->ier = inb(iobase+IER); 
2106         eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */ 
2107
2108         outb(0, iobase+IER); /* Disable interrupts */
2109         
2110         if (eir) {
2111                 /* Dispatch interrupt handler for the current speed */
2112                 if (self->io.speed > 115200)
2113                         nsc_ircc_fir_interrupt(self, iobase, eir);
2114                 else
2115                         nsc_ircc_sir_interrupt(self, eir);
2116         }
2117         
2118         outb(self->ier, iobase+IER); /* Restore interrupts */
2119         outb(bsr, iobase+BSR);       /* Restore bank register */
2120
2121         spin_unlock(&self->lock);
2122         return IRQ_RETVAL(eir);
2123 }
2124
2125 /*
2126  * Function nsc_ircc_is_receiving (self)
2127  *
2128  *    Return TRUE is we are currently receiving a frame
2129  *
2130  */
2131 static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self)
2132 {
2133         unsigned long flags;
2134         int status = FALSE;
2135         int iobase;
2136         __u8 bank;
2137
2138         IRDA_ASSERT(self != NULL, return FALSE;);
2139
2140         spin_lock_irqsave(&self->lock, flags);
2141
2142         if (self->io.speed > 115200) {
2143                 iobase = self->io.fir_base;
2144
2145                 /* Check if rx FIFO is not empty */
2146                 bank = inb(iobase+BSR);
2147                 switch_bank(iobase, BANK2);
2148                 if ((inb(iobase+RXFLV) & 0x3f) != 0) {
2149                         /* We are receiving something */
2150                         status =  TRUE;
2151                 }
2152                 outb(bank, iobase+BSR);
2153         } else 
2154                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2155         
2156         spin_unlock_irqrestore(&self->lock, flags);
2157
2158         return status;
2159 }
2160
2161 /*
2162  * Function nsc_ircc_net_open (dev)
2163  *
2164  *    Start the device
2165  *
2166  */
2167 static int nsc_ircc_net_open(struct net_device *dev)
2168 {
2169         struct nsc_ircc_cb *self;
2170         int iobase;
2171         char hwname[32];
2172         __u8 bank;
2173         
2174         IRDA_DEBUG(4, "%s()\n", __func__);
2175         
2176         IRDA_ASSERT(dev != NULL, return -1;);
2177         self = netdev_priv(dev);
2178         
2179         IRDA_ASSERT(self != NULL, return 0;);
2180         
2181         iobase = self->io.fir_base;
2182         
2183         if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) {
2184                 IRDA_WARNING("%s, unable to allocate irq=%d\n",
2185                              driver_name, self->io.irq);
2186                 return -EAGAIN;
2187         }
2188         /*
2189          * Always allocate the DMA channel after the IRQ, and clean up on 
2190          * failure.
2191          */
2192         if (request_dma(self->io.dma, dev->name)) {
2193                 IRDA_WARNING("%s, unable to allocate dma=%d\n",
2194                              driver_name, self->io.dma);
2195                 free_irq(self->io.irq, dev);
2196                 return -EAGAIN;
2197         }
2198         
2199         /* Save current bank */
2200         bank = inb(iobase+BSR);
2201         
2202         /* turn on interrupts */
2203         switch_bank(iobase, BANK0);
2204         outb(IER_LS_IE | IER_RXHDL_IE, iobase+IER);
2205
2206         /* Restore bank register */
2207         outb(bank, iobase+BSR);
2208
2209         /* Ready to play! */
2210         netif_start_queue(dev);
2211         
2212         /* Give self a hardware name */
2213         sprintf(hwname, "NSC-FIR @ 0x%03x", self->io.fir_base);
2214
2215         /* 
2216          * Open new IrLAP layer instance, now that everything should be
2217          * initialized properly 
2218          */
2219         self->irlap = irlap_open(dev, &self->qos, hwname);
2220
2221         return 0;
2222 }
2223
2224 /*
2225  * Function nsc_ircc_net_close (dev)
2226  *
2227  *    Stop the device
2228  *
2229  */
2230 static int nsc_ircc_net_close(struct net_device *dev)
2231 {
2232         struct nsc_ircc_cb *self;
2233         int iobase;
2234         __u8 bank;
2235
2236         IRDA_DEBUG(4, "%s()\n", __func__);
2237         
2238         IRDA_ASSERT(dev != NULL, return -1;);
2239
2240         self = netdev_priv(dev);
2241         IRDA_ASSERT(self != NULL, return 0;);
2242
2243         /* Stop device */
2244         netif_stop_queue(dev);
2245         
2246         /* Stop and remove instance of IrLAP */
2247         if (self->irlap)
2248                 irlap_close(self->irlap);
2249         self->irlap = NULL;
2250         
2251         iobase = self->io.fir_base;
2252
2253         disable_dma(self->io.dma);
2254
2255         /* Save current bank */
2256         bank = inb(iobase+BSR);
2257
2258         /* Disable interrupts */
2259         switch_bank(iobase, BANK0);
2260         outb(0, iobase+IER); 
2261        
2262         free_irq(self->io.irq, dev);
2263         free_dma(self->io.dma);
2264
2265         /* Restore bank register */
2266         outb(bank, iobase+BSR);
2267
2268         return 0;
2269 }
2270
2271 /*
2272  * Function nsc_ircc_net_ioctl (dev, rq, cmd)
2273  *
2274  *    Process IOCTL commands for this device
2275  *
2276  */
2277 static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2278 {
2279         struct if_irda_req *irq = (struct if_irda_req *) rq;
2280         struct nsc_ircc_cb *self;
2281         unsigned long flags;
2282         int ret = 0;
2283
2284         IRDA_ASSERT(dev != NULL, return -1;);
2285
2286         self = netdev_priv(dev);
2287
2288         IRDA_ASSERT(self != NULL, return -1;);
2289
2290         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
2291         
2292         switch (cmd) {
2293         case SIOCSBANDWIDTH: /* Set bandwidth */
2294                 if (!capable(CAP_NET_ADMIN)) {
2295                         ret = -EPERM;
2296                         break;
2297                 }
2298                 spin_lock_irqsave(&self->lock, flags);
2299                 nsc_ircc_change_speed(self, irq->ifr_baudrate);
2300                 spin_unlock_irqrestore(&self->lock, flags);
2301                 break;
2302         case SIOCSMEDIABUSY: /* Set media busy */
2303                 if (!capable(CAP_NET_ADMIN)) {
2304                         ret = -EPERM;
2305                         break;
2306                 }
2307                 irda_device_set_media_busy(self->netdev, TRUE);
2308                 break;
2309         case SIOCGRECEIVING: /* Check if we are receiving right now */
2310                 /* This is already protected */
2311                 irq->ifr_receiving = nsc_ircc_is_receiving(self);
2312                 break;
2313         default:
2314                 ret = -EOPNOTSUPP;
2315         }
2316         return ret;
2317 }
2318
2319 static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
2320 {
2321         struct nsc_ircc_cb *self = platform_get_drvdata(dev);
2322         int bank;
2323         unsigned long flags;
2324         int iobase = self->io.fir_base;
2325
2326         if (self->io.suspended)
2327                 return 0;
2328
2329         IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
2330
2331         rtnl_lock();
2332         if (netif_running(self->netdev)) {
2333                 netif_device_detach(self->netdev);
2334                 spin_lock_irqsave(&self->lock, flags);
2335                 /* Save current bank */
2336                 bank = inb(iobase+BSR);
2337
2338                 /* Disable interrupts */
2339                 switch_bank(iobase, BANK0);
2340                 outb(0, iobase+IER);
2341
2342                 /* Restore bank register */
2343                 outb(bank, iobase+BSR);
2344
2345                 spin_unlock_irqrestore(&self->lock, flags);
2346                 free_irq(self->io.irq, self->netdev);
2347                 disable_dma(self->io.dma);
2348         }
2349         self->io.suspended = 1;
2350         rtnl_unlock();
2351
2352         return 0;
2353 }
2354
2355 static int nsc_ircc_resume(struct platform_device *dev)
2356 {
2357         struct nsc_ircc_cb *self = platform_get_drvdata(dev);
2358         unsigned long flags;
2359
2360         if (!self->io.suspended)
2361                 return 0;
2362
2363         IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
2364
2365         rtnl_lock();
2366         nsc_ircc_setup(&self->io);
2367         nsc_ircc_init_dongle_interface(self->io.fir_base, self->io.dongle_id);
2368
2369         if (netif_running(self->netdev)) {
2370                 if (request_irq(self->io.irq, nsc_ircc_interrupt, 0,
2371                                 self->netdev->name, self->netdev)) {
2372                         IRDA_WARNING("%s, unable to allocate irq=%d\n",
2373                                      driver_name, self->io.irq);
2374
2375                         /*
2376                          * Don't fail resume process, just kill this
2377                          * network interface
2378                          */
2379                         unregister_netdevice(self->netdev);
2380                 } else {
2381                         spin_lock_irqsave(&self->lock, flags);
2382                         nsc_ircc_change_speed(self, self->io.speed);
2383                         spin_unlock_irqrestore(&self->lock, flags);
2384                         netif_device_attach(self->netdev);
2385                 }
2386
2387         } else {
2388                 spin_lock_irqsave(&self->lock, flags);
2389                 nsc_ircc_change_speed(self, 9600);
2390                 spin_unlock_irqrestore(&self->lock, flags);
2391         }
2392         self->io.suspended = 0;
2393         rtnl_unlock();
2394
2395         return 0;
2396 }
2397
2398 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2399 MODULE_DESCRIPTION("NSC IrDA Device Driver");
2400 MODULE_LICENSE("GPL");
2401
2402
2403 module_param(qos_mtt_bits, int, 0);
2404 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
2405 module_param_array(io, int, NULL, 0);
2406 MODULE_PARM_DESC(io, "Base I/O addresses");
2407 module_param_array(irq, int, NULL, 0);
2408 MODULE_PARM_DESC(irq, "IRQ lines");
2409 module_param_array(dma, int, NULL, 0);
2410 MODULE_PARM_DESC(dma, "DMA channels");
2411 module_param(dongle_id, int, 0);
2412 MODULE_PARM_DESC(dongle_id, "Type-id of used dongle");
2413
2414 module_init(nsc_ircc_init);
2415 module_exit(nsc_ircc_cleanup);
2416