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