]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/net/irda/nsc-ircc.c
projects / mirror_ubuntu-jammy-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
treewide: Fix typos in various parts of the kernel, and fix some comments.
[mirror_ubuntu-jammy-kernel.git] / 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 #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
74 static char *driver_name = "nsc-ircc";
75
76 /* Power Management */
77 #define NSC_IRCC_DRIVER_NAME "nsc-ircc"
78 static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
79 static int nsc_ircc_resume(struct platform_device *dev);
80
81 static 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 */
90 static int qos_mtt_bits = 0x07; /* 1 ms or more */
91 static int dongle_id;
92
93 /* Use BIOS settions by default, but user may supply module parameters */
94 static unsigned int io[] = { ~0, ~0, ~0, ~0, ~0 };
95 static unsigned int irq[] = { 0, 0, 0, 0, 0 };
96 static unsigned int dma[] = { 0, 0, 0, 0, 0 };
97
98 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info);
99 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info);
100 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info);
101 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info);
102 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info);
103 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info);
104 #ifdef CONFIG_PNP
105 static 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 */
109 static 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
130 static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL, NULL };
131
132 static 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 */
152 static chipio_t pnp_info;
153 static 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
160 MODULE_DEVICE_TABLE(pnp, nsc_ircc_pnp_table);
161
162 static 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 */
171 static int nsc_ircc_open(chipio_t *info);
172 static int nsc_ircc_close(struct nsc_ircc_cb *self);
173 static int nsc_ircc_setup(chipio_t *info);
174 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self);
175 static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self);
176 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase);
177 static netdev_tx_t nsc_ircc_hard_xmit_sir(struct sk_buff *skb,
178 struct net_device *dev);
179 static netdev_tx_t nsc_ircc_hard_xmit_fir(struct sk_buff *skb,
180 struct net_device *dev);
181 static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
182 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase);
183 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud);
184 static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self);
185 static int nsc_ircc_read_dongle_id (int iobase);
186 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id);
187
188 static int nsc_ircc_net_open(struct net_device *dev);
189 static int nsc_ircc_net_close(struct net_device *dev);
190 static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
191
192 /* Globals */
193 static int pnp_registered;
194 static 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 */
202 static 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 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
215 return ret;
216 }
217
218 /* Register with PnP subsystem to detect disable ports */
219 ret = pnp_register_driver(&nsc_ircc_pnp_driver);
220
221 if (!ret)
222 pnp_registered = 1;
223
224 ret = -ENODEV;
225
226 /* Probe for all the NSC chipsets we know about */
227 for (chip = chips; chip->name ; chip++) {
228 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__,
229 chip->name);
230
231 /* Try all config registers for this chip */
232 for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) {
233 cfg_base = chip->cfg[cfg];
234 if (!cfg_base)
235 continue;
236
237 /* Read index register */
238 reg = inb(cfg_base);
239 if (reg == 0xff) {
240 IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __func__, cfg_base);
241 continue;
242 }
243
244 /* Read chip identification register */
245 outb(chip->cid_index, cfg_base);
246 id = inb(cfg_base+1);
247 if ((id & chip->cid_mask) == chip->cid_value) {
248 IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n",
249 __func__, chip->name, id & ~chip->cid_mask);
250
251 /*
252 * If we found a correct PnP setting,
253 * we first try it.
254 */
255 if (pnp_succeeded) {
256 memset(&info, 0, sizeof(chipio_t));
257 info.cfg_base = cfg_base;
258 info.fir_base = pnp_info.fir_base;
259 info.dma = pnp_info.dma;
260 info.irq = pnp_info.irq;
261
262 if (info.fir_base < 0x2000) {
263 IRDA_MESSAGE("%s, chip->init\n", driver_name);
264 chip->init(chip, &info);
265 } else
266 chip->probe(chip, &info);
267
268 if (nsc_ircc_open(&info) >= 0)
269 ret = 0;
270 }
271
272 /*
273 * Opening based on PnP values failed.
274 * Let's fallback to user values, or probe
275 * the chip.
276 */
277 if (ret) {
278 IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name);
279 memset(&info, 0, sizeof(chipio_t));
280 info.cfg_base = cfg_base;
281 info.fir_base = io[i];
282 info.dma = dma[i];
283 info.irq = irq[i];
284
285 /*
286 * If the user supplies the base address, then
287 * we init the chip, if not we probe the values
288 * set by the BIOS
289 */
290 if (io[i] < 0x2000) {
291 chip->init(chip, &info);
292 } else
293 chip->probe(chip, &info);
294
295 if (nsc_ircc_open(&info) >= 0)
296 ret = 0;
297 }
298 i++;
299 } else {
300 IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __func__, id);
301 }
302 }
303 }
304
305 if (ret) {
306 platform_driver_unregister(&nsc_ircc_driver);
307 pnp_unregister_driver(&nsc_ircc_pnp_driver);
308 pnp_registered = 0;
309 }
310
311 return ret;
312 }
313
314 /*
315 * Function nsc_ircc_cleanup ()
316 *
317 * Close all configured chips
318 *
319 */
320 static void __exit nsc_ircc_cleanup(void)
321 {
322 int i;
323
324 for (i = 0; i < ARRAY_SIZE(dev_self); i++) {
325 if (dev_self[i])
326 nsc_ircc_close(dev_self[i]);
327 }
328
329 platform_driver_unregister(&nsc_ircc_driver);
330
331 if (pnp_registered)
332 pnp_unregister_driver(&nsc_ircc_pnp_driver);
333
334 pnp_registered = 0;
335 }
336
337 static const struct net_device_ops nsc_ircc_sir_ops = {
338 .ndo_open = nsc_ircc_net_open,
339 .ndo_stop = nsc_ircc_net_close,
340 .ndo_start_xmit = nsc_ircc_hard_xmit_sir,
341 .ndo_do_ioctl = nsc_ircc_net_ioctl,
342 };
343
344 static const struct net_device_ops nsc_ircc_fir_ops = {
345 .ndo_open = nsc_ircc_net_open,
346 .ndo_stop = nsc_ircc_net_close,
347 .ndo_start_xmit = nsc_ircc_hard_xmit_fir,
348 .ndo_do_ioctl = nsc_ircc_net_ioctl,
349 };
350
351 /*
352 * Function nsc_ircc_open (iobase, irq)
353 *
354 * Open driver instance
355 *
356 */
357 static int __init nsc_ircc_open(chipio_t *info)
358 {
359 struct net_device *dev;
360 struct nsc_ircc_cb *self;
361 void *ret;
362 int err, chip_index;
363
364 IRDA_DEBUG(2, "%s()\n", __func__);
365
366
367 for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) {
368 if (!dev_self[chip_index])
369 break;
370 }
371
372 if (chip_index == ARRAY_SIZE(dev_self)) {
373 IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __func__);
374 return -ENOMEM;
375 }
376
377 IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
378 info->cfg_base);
379
380 if ((nsc_ircc_setup(info)) == -1)
381 return -1;
382
383 IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
384
385 dev = alloc_irdadev(sizeof(struct nsc_ircc_cb));
386 if (dev == NULL) {
387 IRDA_ERROR("%s(), can't allocate memory for "
388 "control block!\n", __func__);
389 return -ENOMEM;
390 }
391
392 self = netdev_priv(dev);
393 self->netdev = dev;
394 spin_lock_init(&self->lock);
395
396 /* Need to store self somewhere */
397 dev_self[chip_index] = self;
398 self->index = chip_index;
399
400 /* Initialize IO */
401 self->io.cfg_base = info->cfg_base;
402 self->io.fir_base = info->fir_base;
403 self->io.irq = info->irq;
404 self->io.fir_ext = CHIP_IO_EXTENT;
405 self->io.dma = info->dma;
406 self->io.fifo_size = 32;
407
408 /* Reserve the ioports that we need */
409 ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name);
410 if (!ret) {
411 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n",
412 __func__, self->io.fir_base);
413 err = -ENODEV;
414 goto out1;
415 }
416
417 /* Initialize QoS for this device */
418 irda_init_max_qos_capabilies(&self->qos);
419
420 /* The only value we must override it the baudrate */
421 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
422 IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8);
423
424 self->qos.min_turn_time.bits = qos_mtt_bits;
425 irda_qos_bits_to_value(&self->qos);
426
427 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
428 self->rx_buff.truesize = 14384;
429 self->tx_buff.truesize = 14384;
430
431 /* Allocate memory if needed */
432 self->rx_buff.head =
433 dma_alloc_coherent(NULL, self->rx_buff.truesize,
434 &self->rx_buff_dma, GFP_KERNEL);
435 if (self->rx_buff.head == NULL) {
436 err = -ENOMEM;
437 goto out2;
438
439 }
440 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
441
442 self->tx_buff.head =
443 dma_alloc_coherent(NULL, self->tx_buff.truesize,
444 &self->tx_buff_dma, GFP_KERNEL);
445 if (self->tx_buff.head == NULL) {
446 err = -ENOMEM;
447 goto out3;
448 }
449 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
450
451 self->rx_buff.in_frame = FALSE;
452 self->rx_buff.state = OUTSIDE_FRAME;
453 self->tx_buff.data = self->tx_buff.head;
454 self->rx_buff.data = self->rx_buff.head;
455
456 /* Reset Tx queue info */
457 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
458 self->tx_fifo.tail = self->tx_buff.head;
459
460 /* Override the network functions we need to use */
461 dev->netdev_ops = &nsc_ircc_sir_ops;
462
463 err = register_netdev(dev);
464 if (err) {
465 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
466 goto out4;
467 }
468 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
469
470 /* Check if user has supplied a valid dongle id or not */
471 if ((dongle_id <= 0) ||
472 (dongle_id >= ARRAY_SIZE(dongle_types))) {
473 dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
474
475 IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name,
476 dongle_types[dongle_id]);
477 } else {
478 IRDA_MESSAGE("%s, Using dongle: %s\n", driver_name,
479 dongle_types[dongle_id]);
480 }
481
482 self->io.dongle_id = dongle_id;
483 nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id);
484
485 self->pldev = platform_device_register_simple(NSC_IRCC_DRIVER_NAME,
486 self->index, NULL, 0);
487 if (IS_ERR(self->pldev)) {
488 err = PTR_ERR(self->pldev);
489 goto out5;
490 }
491 platform_set_drvdata(self->pldev, self);
492
493 return chip_index;
494
495 out5:
496 unregister_netdev(dev);
497 out4:
498 dma_free_coherent(NULL, self->tx_buff.truesize,
499 self->tx_buff.head, self->tx_buff_dma);
500 out3:
501 dma_free_coherent(NULL, self->rx_buff.truesize,
502 self->rx_buff.head, self->rx_buff_dma);
503 out2:
504 release_region(self->io.fir_base, self->io.fir_ext);
505 out1:
506 free_netdev(dev);
507 dev_self[chip_index] = NULL;
508 return err;
509 }
510
511 /*
512 * Function nsc_ircc_close (self)
513 *
514 * Close driver instance
515 *
516 */
517 static int __exit nsc_ircc_close(struct nsc_ircc_cb *self)
518 {
519 int iobase;
520
521 IRDA_DEBUG(4, "%s()\n", __func__);
522
523 IRDA_ASSERT(self != NULL, return -1;);
524
525 iobase = self->io.fir_base;
526
527 platform_device_unregister(self->pldev);
528
529 /* Remove netdevice */
530 unregister_netdev(self->netdev);
531
532 /* Release the PORT that this driver is using */
533 IRDA_DEBUG(4, "%s(), Releasing Region %03x\n",
534 __func__, self->io.fir_base);
535 release_region(self->io.fir_base, self->io.fir_ext);
536
537 if (self->tx_buff.head)
538 dma_free_coherent(NULL, self->tx_buff.truesize,
539 self->tx_buff.head, self->tx_buff_dma);
540
541 if (self->rx_buff.head)
542 dma_free_coherent(NULL, self->rx_buff.truesize,
543 self->rx_buff.head, self->rx_buff_dma);
544
545 dev_self[self->index] = NULL;
546 free_netdev(self->netdev);
547
548 return 0;
549 }
550
551 /*
552 * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma)
553 *
554 * Initialize the NSC '108 chip
555 *
556 */
557 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info)
558 {
559 int cfg_base = info->cfg_base;
560 __u8 temp=0;
561
562 outb(2, cfg_base); /* Mode Control Register (MCTL) */
563 outb(0x00, cfg_base+1); /* Disable device */
564
565 /* Base Address and Interrupt Control Register (BAIC) */
566 outb(CFG_108_BAIC, cfg_base);
567 switch (info->fir_base) {
568 case 0x3e8: outb(0x14, cfg_base+1); break;
569 case 0x2e8: outb(0x15, cfg_base+1); break;
570 case 0x3f8: outb(0x16, cfg_base+1); break;
571 case 0x2f8: outb(0x17, cfg_base+1); break;
572 default: IRDA_ERROR("%s(), invalid base_address", __func__);
573 }
574
575 /* Control Signal Routing Register (CSRT) */
576 switch (info->irq) {
577 case 3: temp = 0x01; break;
578 case 4: temp = 0x02; break;
579 case 5: temp = 0x03; break;
580 case 7: temp = 0x04; break;
581 case 9: temp = 0x05; break;
582 case 11: temp = 0x06; break;
583 case 15: temp = 0x07; break;
584 default: IRDA_ERROR("%s(), invalid irq", __func__);
585 }
586 outb(CFG_108_CSRT, cfg_base);
587
588 switch (info->dma) {
589 case 0: outb(0x08+temp, cfg_base+1); break;
590 case 1: outb(0x10+temp, cfg_base+1); break;
591 case 3: outb(0x18+temp, cfg_base+1); break;
592 default: IRDA_ERROR("%s(), invalid dma", __func__);
593 }
594
595 outb(CFG_108_MCTL, cfg_base); /* Mode Control Register (MCTL) */
596 outb(0x03, cfg_base+1); /* Enable device */
597
598 return 0;
599 }
600
601 /*
602 * Function nsc_ircc_probe_108 (chip, info)
603 *
604 *
605 *
606 */
607 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info)
608 {
609 int cfg_base = info->cfg_base;
610 int reg;
611
612 /* Read address and interrupt control register (BAIC) */
613 outb(CFG_108_BAIC, cfg_base);
614 reg = inb(cfg_base+1);
615
616 switch (reg & 0x03) {
617 case 0:
618 info->fir_base = 0x3e8;
619 break;
620 case 1:
621 info->fir_base = 0x2e8;
622 break;
623 case 2:
624 info->fir_base = 0x3f8;
625 break;
626 case 3:
627 info->fir_base = 0x2f8;
628 break;
629 }
630 info->sir_base = info->fir_base;
631 IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__,
632 info->fir_base);
633
634 /* Read control signals routing register (CSRT) */
635 outb(CFG_108_CSRT, cfg_base);
636 reg = inb(cfg_base+1);
637
638 switch (reg & 0x07) {
639 case 0:
640 info->irq = -1;
641 break;
642 case 1:
643 info->irq = 3;
644 break;
645 case 2:
646 info->irq = 4;
647 break;
648 case 3:
649 info->irq = 5;
650 break;
651 case 4:
652 info->irq = 7;
653 break;
654 case 5:
655 info->irq = 9;
656 break;
657 case 6:
658 info->irq = 11;
659 break;
660 case 7:
661 info->irq = 15;
662 break;
663 }
664 IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
665
666 /* Currently we only read Rx DMA but it will also be used for Tx */
667 switch ((reg >> 3) & 0x03) {
668 case 0:
669 info->dma = -1;
670 break;
671 case 1:
672 info->dma = 0;
673 break;
674 case 2:
675 info->dma = 1;
676 break;
677 case 3:
678 info->dma = 3;
679 break;
680 }
681 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
682
683 /* Read mode control register (MCTL) */
684 outb(CFG_108_MCTL, cfg_base);
685 reg = inb(cfg_base+1);
686
687 info->enabled = reg & 0x01;
688 info->suspended = !((reg >> 1) & 0x01);
689
690 return 0;
691 }
692
693 /*
694 * Function nsc_ircc_init_338 (chip, info)
695 *
696 * Initialize the NSC '338 chip. Remember that the 87338 needs two
697 * consecutive writes to the data registers while CPU interrupts are
698 * disabled. The 97338 does not require this, but shouldn't be any
699 * harm if we do it anyway.
700 */
701 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info)
702 {
703 /* No init yet */
704
705 return 0;
706 }
707
708 /*
709 * Function nsc_ircc_probe_338 (chip, info)
710 *
711 *
712 *
713 */
714 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info)
715 {
716 int cfg_base = info->cfg_base;
717 int reg, com = 0;
718 int pnp;
719
720 /* Read function enable register (FER) */
721 outb(CFG_338_FER, cfg_base);
722 reg = inb(cfg_base+1);
723
724 info->enabled = (reg >> 2) & 0x01;
725
726 /* Check if we are in Legacy or PnP mode */
727 outb(CFG_338_PNP0, cfg_base);
728 reg = inb(cfg_base+1);
729
730 pnp = (reg >> 3) & 0x01;
731 if (pnp) {
732 IRDA_DEBUG(2, "(), Chip is in PnP mode\n");
733 outb(0x46, cfg_base);
734 reg = (inb(cfg_base+1) & 0xfe) << 2;
735
736 outb(0x47, cfg_base);
737 reg |= ((inb(cfg_base+1) & 0xfc) << 8);
738
739 info->fir_base = reg;
740 } else {
741 /* Read function address register (FAR) */
742 outb(CFG_338_FAR, cfg_base);
743 reg = inb(cfg_base+1);
744
745 switch ((reg >> 4) & 0x03) {
746 case 0:
747 info->fir_base = 0x3f8;
748 break;
749 case 1:
750 info->fir_base = 0x2f8;
751 break;
752 case 2:
753 com = 3;
754 break;
755 case 3:
756 com = 4;
757 break;
758 }
759
760 if (com) {
761 switch ((reg >> 6) & 0x03) {
762 case 0:
763 if (com == 3)
764 info->fir_base = 0x3e8;
765 else
766 info->fir_base = 0x2e8;
767 break;
768 case 1:
769 if (com == 3)
770 info->fir_base = 0x338;
771 else
772 info->fir_base = 0x238;
773 break;
774 case 2:
775 if (com == 3)
776 info->fir_base = 0x2e8;
777 else
778 info->fir_base = 0x2e0;
779 break;
780 case 3:
781 if (com == 3)
782 info->fir_base = 0x220;
783 else
784 info->fir_base = 0x228;
785 break;
786 }
787 }
788 }
789 info->sir_base = info->fir_base;
790
791 /* Read PnP register 1 (PNP1) */
792 outb(CFG_338_PNP1, cfg_base);
793 reg = inb(cfg_base+1);
794
795 info->irq = reg >> 4;
796
797 /* Read PnP register 3 (PNP3) */
798 outb(CFG_338_PNP3, cfg_base);
799 reg = inb(cfg_base+1);
800
801 info->dma = (reg & 0x07) - 1;
802
803 /* Read power and test register (PTR) */
804 outb(CFG_338_PTR, cfg_base);
805 reg = inb(cfg_base+1);
806
807 info->suspended = reg & 0x01;
808
809 return 0;
810 }
811
812
813 /*
814 * Function nsc_ircc_init_39x (chip, info)
815 *
816 * Now that we know it's a '39x (see probe below), we need to
817 * configure it so we can use it.
818 *
819 * The NSC '338 chip is a Super I/O chip with a "bank" architecture,
820 * the configuration of the different functionality (serial, parallel,
821 * floppy...) are each in a different bank (Logical Device Number).
822 * The base address, irq and dma configuration registers are common
823 * to all functionalities (index 0x30 to 0x7F).
824 * There is only one configuration register specific to the
825 * serial port, CFG_39X_SPC.
826 * JeanII
827 *
828 * Note : this code was written by Jan Frey <janfrey@web.de>
829 */
830 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info)
831 {
832 int cfg_base = info->cfg_base;
833 int enabled;
834
835 /* User is sure about his config... accept it. */
836 IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): "
837 "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 */
872 static 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 IRDA_DEBUG(2, "%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 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);
914
915 /* Configure SP2 */
916
917 /* We want to enable the device if not enabled */
918 outb(CFG_39X_ACT, cfg_base);
919 enabled = inb(cfg_base+1) & 0x01;
920
921 if (!enabled) {
922 /* Enable the device */
923 outb(CFG_39X_SIOCF1, cfg_base);
924 outb(0x01, cfg_base+1);
925 /* May want to update info->enabled. Jean II */
926 }
927
928 /* Enable UART bank switching (bit 7) ; Sets the chip to normal
929 * power mode (wake up from sleep mode) (bit 1) */
930 outb(CFG_39X_SPC, cfg_base);
931 outb(0x82, cfg_base+1);
932
933 return 0;
934 }
935
936 #ifdef CONFIG_PNP
937 /* PNP probing */
938 static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
939 {
940 memset(&pnp_info, 0, sizeof(chipio_t));
941 pnp_info.irq = -1;
942 pnp_info.dma = -1;
943 pnp_succeeded = 1;
944
945 if (id->driver_data & NSC_FORCE_DONGLE_TYPE9)
946 dongle_id = 0x9;
947
948 /* There doesn't seem to be any way of getting the cfg_base.
949 * On my box, cfg_base is in the PnP descriptor of the
950 * motherboard. Oh well... Jean II */
951
952 if (pnp_port_valid(dev, 0) &&
953 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED))
954 pnp_info.fir_base = pnp_port_start(dev, 0);
955
956 if (pnp_irq_valid(dev, 0) &&
957 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED))
958 pnp_info.irq = pnp_irq(dev, 0);
959
960 if (pnp_dma_valid(dev, 0) &&
961 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED))
962 pnp_info.dma = pnp_dma(dev, 0);
963
964 IRDA_DEBUG(0, "%s() : From PnP, found firbase 0x%03X ; irq %d ; dma %d.\n",
965 __func__, pnp_info.fir_base, pnp_info.irq, pnp_info.dma);
966
967 if((pnp_info.fir_base == 0) ||
968 (pnp_info.irq == -1) || (pnp_info.dma == -1)) {
969 /* Returning an error will disable the device. Yuck ! */
970 //return -EINVAL;
971 pnp_succeeded = 0;
972 }
973
974 return 0;
975 }
976 #endif
977
978 /*
979 * Function nsc_ircc_setup (info)
980 *
981 * Returns non-negative on success.
982 *
983 */
984 static int nsc_ircc_setup(chipio_t *info)
985 {
986 int version;
987 int iobase = info->fir_base;
988
989 /* Read the Module ID */
990 switch_bank(iobase, BANK3);
991 version = inb(iobase+MID);
992
993 IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n",
994 __func__, driver_name, version);
995
996 /* Should be 0x2? */
997 if (0x20 != (version & 0xf0)) {
998 IRDA_ERROR("%s, Wrong chip version %02x\n",
999 driver_name, version);
1000 return -1;
1001 }
1002
1003 /* Switch to advanced mode */
1004 switch_bank(iobase, BANK2);
1005 outb(ECR1_EXT_SL, iobase+ECR1);
1006 switch_bank(iobase, BANK0);
1007
1008 /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
1009 switch_bank(iobase, BANK0);
1010 outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1011
1012 outb(0x03, iobase+LCR); /* 8 bit word length */
1013 outb(MCR_SIR, iobase+MCR); /* Start at SIR-mode, also clears LSR*/
1014
1015 /* Set FIFO size to 32 */
1016 switch_bank(iobase, BANK2);
1017 outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1018
1019 /* IRCR2: FEND_MD is not set */
1020 switch_bank(iobase, BANK5);
1021 outb(0x02, iobase+4);
1022
1023 /* Make sure that some defaults are OK */
1024 switch_bank(iobase, BANK6);
1025 outb(0x20, iobase+0); /* Set 32 bits FIR CRC */
1026 outb(0x0a, iobase+1); /* Set MIR pulse width */
1027 outb(0x0d, iobase+2); /* Set SIR pulse width to 1.6us */
1028 outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */
1029
1030 /* Enable receive interrupts */
1031 switch_bank(iobase, BANK0);
1032 outb(IER_RXHDL_IE, iobase+IER);
1033
1034 return 0;
1035 }
1036
1037 /*
1038 * Function nsc_ircc_read_dongle_id (void)
1039 *
1040 * Try to read dongle indentification. This procedure needs to be executed
1041 * once after power-on/reset. It also needs to be used whenever you suspect
1042 * that the user may have plugged/unplugged the IrDA Dongle.
1043 */
1044 static int nsc_ircc_read_dongle_id (int iobase)
1045 {
1046 int dongle_id;
1047 __u8 bank;
1048
1049 bank = inb(iobase+BSR);
1050
1051 /* Select Bank 7 */
1052 switch_bank(iobase, BANK7);
1053
1054 /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
1055 outb(0x00, iobase+7);
1056
1057 /* ID0, 1, and 2 are pulled up/down very slowly */
1058 udelay(50);
1059
1060 /* IRCFG1: read the ID bits */
1061 dongle_id = inb(iobase+4) & 0x0f;
1062
1063 #ifdef BROKEN_DONGLE_ID
1064 if (dongle_id == 0x0a)
1065 dongle_id = 0x09;
1066 #endif
1067 /* Go back to bank 0 before returning */
1068 switch_bank(iobase, BANK0);
1069
1070 outb(bank, iobase+BSR);
1071
1072 return dongle_id;
1073 }
1074
1075 /*
1076 * Function nsc_ircc_init_dongle_interface (iobase, dongle_id)
1077 *
1078 * This function initializes the dongle for the transceiver that is
1079 * used. This procedure needs to be executed once after
1080 * power-on/reset. It also needs to be used whenever you suspect that
1081 * the dongle is changed.
1082 */
1083 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id)
1084 {
1085 int bank;
1086
1087 /* Save current bank */
1088 bank = inb(iobase+BSR);
1089
1090 /* Select Bank 7 */
1091 switch_bank(iobase, BANK7);
1092
1093 /* IRCFG4: set according to dongle_id */
1094 switch (dongle_id) {
1095 case 0x00: /* same as */
1096 case 0x01: /* Differential serial interface */
1097 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1098 __func__, dongle_types[dongle_id]);
1099 break;
1100 case 0x02: /* same as */
1101 case 0x03: /* Reserved */
1102 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1103 __func__, dongle_types[dongle_id]);
1104 break;
1105 case 0x04: /* Sharp RY5HD01 */
1106 break;
1107 case 0x05: /* Reserved, but this is what the Thinkpad reports */
1108 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1109 __func__, dongle_types[dongle_id]);
1110 break;
1111 case 0x06: /* Single-ended serial interface */
1112 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1113 __func__, dongle_types[dongle_id]);
1114 break;
1115 case 0x07: /* Consumer-IR only */
1116 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1117 __func__, dongle_types[dongle_id]);
1118 break;
1119 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1120 IRDA_DEBUG(0, "%s(), %s\n",
1121 __func__, dongle_types[dongle_id]);
1122 break;
1123 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1124 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
1125 break;
1126 case 0x0A: /* same as */
1127 case 0x0B: /* Reserved */
1128 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1129 __func__, dongle_types[dongle_id]);
1130 break;
1131 case 0x0C: /* same as */
1132 case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1133 /*
1134 * Set irsl0 as input, irsl[1-2] as output, and separate
1135 * inputs are used for SIR and MIR/FIR
1136 */
1137 outb(0x48, iobase+7);
1138 break;
1139 case 0x0E: /* Supports SIR Mode only */
1140 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
1141 break;
1142 case 0x0F: /* No dongle connected */
1143 IRDA_DEBUG(0, "%s(), %s\n",
1144 __func__, dongle_types[dongle_id]);
1145
1146 switch_bank(iobase, BANK0);
1147 outb(0x62, iobase+MCR);
1148 break;
1149 default:
1150 IRDA_DEBUG(0, "%s(), invalid dongle_id %#x",
1151 __func__, dongle_id);
1152 }
1153
1154 /* IRCFG1: IRSL1 and 2 are set to IrDA mode */
1155 outb(0x00, iobase+4);
1156
1157 /* Restore bank register */
1158 outb(bank, iobase+BSR);
1159
1160 } /* set_up_dongle_interface */
1161
1162 /*
1163 * Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id)
1164 *
1165 * Change speed of the attach dongle
1166 *
1167 */
1168 static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id)
1169 {
1170 __u8 bank;
1171
1172 /* Save current bank */
1173 bank = inb(iobase+BSR);
1174
1175 /* Select Bank 7 */
1176 switch_bank(iobase, BANK7);
1177
1178 /* IRCFG1: set according to dongle_id */
1179 switch (dongle_id) {
1180 case 0x00: /* same as */
1181 case 0x01: /* Differential serial interface */
1182 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1183 __func__, dongle_types[dongle_id]);
1184 break;
1185 case 0x02: /* same as */
1186 case 0x03: /* Reserved */
1187 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1188 __func__, dongle_types[dongle_id]);
1189 break;
1190 case 0x04: /* Sharp RY5HD01 */
1191 break;
1192 case 0x05: /* Reserved */
1193 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1194 __func__, dongle_types[dongle_id]);
1195 break;
1196 case 0x06: /* Single-ended serial interface */
1197 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1198 __func__, dongle_types[dongle_id]);
1199 break;
1200 case 0x07: /* Consumer-IR only */
1201 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1202 __func__, dongle_types[dongle_id]);
1203 break;
1204 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1205 IRDA_DEBUG(0, "%s(), %s\n",
1206 __func__, dongle_types[dongle_id]);
1207 outb(0x00, iobase+4);
1208 if (speed > 115200)
1209 outb(0x01, iobase+4);
1210 break;
1211 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1212 outb(0x01, iobase+4);
1213
1214 if (speed == 4000000) {
1215 /* There was a cli() there, but we now are already
1216 * under spin_lock_irqsave() - JeanII */
1217 outb(0x81, iobase+4);
1218 outb(0x80, iobase+4);
1219 } else
1220 outb(0x00, iobase+4);
1221 break;
1222 case 0x0A: /* same as */
1223 case 0x0B: /* Reserved */
1224 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1225 __func__, dongle_types[dongle_id]);
1226 break;
1227 case 0x0C: /* same as */
1228 case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1229 break;
1230 case 0x0E: /* Supports SIR Mode only */
1231 break;
1232 case 0x0F: /* No dongle connected */
1233 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1234 __func__, dongle_types[dongle_id]);
1235
1236 switch_bank(iobase, BANK0);
1237 outb(0x62, iobase+MCR);
1238 break;
1239 default:
1240 IRDA_DEBUG(0, "%s(), invalid data_rate\n", __func__);
1241 }
1242 /* Restore bank register */
1243 outb(bank, iobase+BSR);
1244 }
1245
1246 /*
1247 * Function nsc_ircc_change_speed (self, baud)
1248 *
1249 * Change the speed of the device
1250 *
1251 * This function *must* be called with irq off and spin-lock.
1252 */
1253 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
1254 {
1255 struct net_device *dev = self->netdev;
1256 __u8 mcr = MCR_SIR;
1257 int iobase;
1258 __u8 bank;
1259 __u8 ier; /* Interrupt enable register */
1260
1261 IRDA_DEBUG(2, "%s(), speed=%d\n", __func__, speed);
1262
1263 IRDA_ASSERT(self != NULL, return 0;);
1264
1265 iobase = self->io.fir_base;
1266
1267 /* Update accounting for new speed */
1268 self->io.speed = speed;
1269
1270 /* Save current bank */
1271 bank = inb(iobase+BSR);
1272
1273 /* Disable interrupts */
1274 switch_bank(iobase, BANK0);
1275 outb(0, iobase+IER);
1276
1277 /* Select Bank 2 */
1278 switch_bank(iobase, BANK2);
1279
1280 outb(0x00, iobase+BGDH);
1281 switch (speed) {
1282 case 9600: outb(0x0c, iobase+BGDL); break;
1283 case 19200: outb(0x06, iobase+BGDL); break;
1284 case 38400: outb(0x03, iobase+BGDL); break;
1285 case 57600: outb(0x02, iobase+BGDL); break;
1286 case 115200: outb(0x01, iobase+BGDL); break;
1287 case 576000:
1288 switch_bank(iobase, BANK5);
1289
1290 /* IRCR2: MDRS is set */
1291 outb(inb(iobase+4) | 0x04, iobase+4);
1292
1293 mcr = MCR_MIR;
1294 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
1295 break;
1296 case 1152000:
1297 mcr = MCR_MIR;
1298 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__);
1299 break;
1300 case 4000000:
1301 mcr = MCR_FIR;
1302 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__);
1303 break;
1304 default:
1305 mcr = MCR_FIR;
1306 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n",
1307 __func__, speed);
1308 break;
1309 }
1310
1311 /* Set appropriate speed mode */
1312 switch_bank(iobase, BANK0);
1313 outb(mcr | MCR_TX_DFR, iobase+MCR);
1314
1315 /* Give some hits to the transceiver */
1316 nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
1317
1318 /* Set FIFO threshold to TX17, RX16 */
1319 switch_bank(iobase, BANK0);
1320 outb(0x00, iobase+FCR);
1321 outb(FCR_FIFO_EN, iobase+FCR);
1322 outb(FCR_RXTH| /* Set Rx FIFO threshold */
1323 FCR_TXTH| /* Set Tx FIFO threshold */
1324 FCR_TXSR| /* Reset Tx FIFO */
1325 FCR_RXSR| /* Reset Rx FIFO */
1326 FCR_FIFO_EN, /* Enable FIFOs */
1327 iobase+FCR);
1328
1329 /* Set FIFO size to 32 */
1330 switch_bank(iobase, BANK2);
1331 outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1332
1333 /* Enable some interrupts so we can receive frames */
1334 switch_bank(iobase, BANK0);
1335 if (speed > 115200) {
1336 /* Install FIR xmit handler */
1337 dev->netdev_ops = &nsc_ircc_fir_ops;
1338 ier = IER_SFIF_IE;
1339 nsc_ircc_dma_receive(self);
1340 } else {
1341 /* Install SIR xmit handler */
1342 dev->netdev_ops = &nsc_ircc_sir_ops;
1343 ier = IER_RXHDL_IE;
1344 }
1345 /* Set our current interrupt mask */
1346 outb(ier, iobase+IER);
1347
1348 /* Restore BSR */
1349 outb(bank, iobase+BSR);
1350
1351 /* Make sure interrupt handlers keep the proper interrupt mask */
1352 return ier;
1353 }
1354
1355 /*
1356 * Function nsc_ircc_hard_xmit (skb, dev)
1357 *
1358 * Transmit the frame!
1359 *
1360 */
1361 static netdev_tx_t nsc_ircc_hard_xmit_sir(struct sk_buff *skb,
1362 struct net_device *dev)
1363 {
1364 struct nsc_ircc_cb *self;
1365 unsigned long flags;
1366 int iobase;
1367 __s32 speed;
1368 __u8 bank;
1369
1370 self = netdev_priv(dev);
1371
1372 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1373
1374 iobase = self->io.fir_base;
1375
1376 netif_stop_queue(dev);
1377
1378 /* Make sure tests *& speed change are atomic */
1379 spin_lock_irqsave(&self->lock, flags);
1380
1381 /* Check if we need to change the speed */
1382 speed = irda_get_next_speed(skb);
1383 if ((speed != self->io.speed) && (speed != -1)) {
1384 /* Check for empty frame. */
1385 if (!skb->len) {
1386 /* If we just sent a frame, we get called before
1387 * the last bytes get out (because of the SIR FIFO).
1388 * If this is the case, let interrupt handler change
1389 * the speed itself... Jean II */
1390 if (self->io.direction == IO_RECV) {
1391 nsc_ircc_change_speed(self, speed);
1392 /* TODO : For SIR->SIR, the next packet
1393 * may get corrupted - Jean II */
1394 netif_wake_queue(dev);
1395 } else {
1396 self->new_speed = speed;
1397 /* Queue will be restarted after speed change
1398 * to make sure packets gets through the
1399 * proper xmit handler - Jean II */
1400 }
1401 dev->trans_start = jiffies;
1402 spin_unlock_irqrestore(&self->lock, flags);
1403 dev_kfree_skb(skb);
1404 return NETDEV_TX_OK;
1405 } else
1406 self->new_speed = speed;
1407 }
1408
1409 /* Save current bank */
1410 bank = inb(iobase+BSR);
1411
1412 self->tx_buff.data = self->tx_buff.head;
1413
1414 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
1415 self->tx_buff.truesize);
1416
1417 dev->stats.tx_bytes += self->tx_buff.len;
1418
1419 /* Add interrupt on tx low level (will fire immediately) */
1420 switch_bank(iobase, BANK0);
1421 outb(IER_TXLDL_IE, iobase+IER);
1422
1423 /* Restore bank register */
1424 outb(bank, iobase+BSR);
1425
1426 dev->trans_start = jiffies;
1427 spin_unlock_irqrestore(&self->lock, flags);
1428
1429 dev_kfree_skb(skb);
1430
1431 return NETDEV_TX_OK;
1432 }
1433
1434 static netdev_tx_t nsc_ircc_hard_xmit_fir(struct sk_buff *skb,
1435 struct net_device *dev)
1436 {
1437 struct nsc_ircc_cb *self;
1438 unsigned long flags;
1439 int iobase;
1440 __s32 speed;
1441 __u8 bank;
1442 int mtt, diff;
1443
1444 self = netdev_priv(dev);
1445 iobase = self->io.fir_base;
1446
1447 netif_stop_queue(dev);
1448
1449 /* Make sure tests *& speed change are atomic */
1450 spin_lock_irqsave(&self->lock, flags);
1451
1452 /* Check if we need to change the speed */
1453 speed = irda_get_next_speed(skb);
1454 if ((speed != self->io.speed) && (speed != -1)) {
1455 /* Check for empty frame. */
1456 if (!skb->len) {
1457 /* If we are currently transmitting, defer to
1458 * interrupt handler. - Jean II */
1459 if(self->tx_fifo.len == 0) {
1460 nsc_ircc_change_speed(self, speed);
1461 netif_wake_queue(dev);
1462 } else {
1463 self->new_speed = speed;
1464 /* Keep queue stopped :
1465 * the speed change operation may change the
1466 * xmit handler, and we want to make sure
1467 * the next packet get through the proper
1468 * Tx path, so block the Tx queue until
1469 * the speed change has been done.
1470 * Jean II */
1471 }
1472 dev->trans_start = jiffies;
1473 spin_unlock_irqrestore(&self->lock, flags);
1474 dev_kfree_skb(skb);
1475 return NETDEV_TX_OK;
1476 } else {
1477 /* Change speed after current frame */
1478 self->new_speed = speed;
1479 }
1480 }
1481
1482 /* Save current bank */
1483 bank = inb(iobase+BSR);
1484
1485 /* Register and copy this frame to DMA memory */
1486 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1487 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1488 self->tx_fifo.tail += skb->len;
1489
1490 dev->stats.tx_bytes += skb->len;
1491
1492 skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1493 skb->len);
1494 self->tx_fifo.len++;
1495 self->tx_fifo.free++;
1496
1497 /* Start transmit only if there is currently no transmit going on */
1498 if (self->tx_fifo.len == 1) {
1499 /* Check if we must wait the min turn time or not */
1500 mtt = irda_get_mtt(skb);
1501 if (mtt) {
1502 /* Check how much time we have used already */
1503 do_gettimeofday(&self->now);
1504 diff = self->now.tv_usec - self->stamp.tv_usec;
1505 if (diff < 0)
1506 diff += 1000000;
1507
1508 /* Check if the mtt is larger than the time we have
1509 * already used by all the protocol processing
1510 */
1511 if (mtt > diff) {
1512 mtt -= diff;
1513
1514 /*
1515 * Use timer if delay larger than 125 us, and
1516 * use udelay for smaller values which should
1517 * be acceptable
1518 */
1519 if (mtt > 125) {
1520 /* Adjust for timer resolution */
1521 mtt = mtt / 125;
1522
1523 /* Setup timer */
1524 switch_bank(iobase, BANK4);
1525 outb(mtt & 0xff, iobase+TMRL);
1526 outb((mtt >> 8) & 0x0f, iobase+TMRH);
1527
1528 /* Start timer */
1529 outb(IRCR1_TMR_EN, iobase+IRCR1);
1530 self->io.direction = IO_XMIT;
1531
1532 /* Enable timer interrupt */
1533 switch_bank(iobase, BANK0);
1534 outb(IER_TMR_IE, iobase+IER);
1535
1536 /* Timer will take care of the rest */
1537 goto out;
1538 } else
1539 udelay(mtt);
1540 }
1541 }
1542 /* Enable DMA interrupt */
1543 switch_bank(iobase, BANK0);
1544 outb(IER_DMA_IE, iobase+IER);
1545
1546 /* Transmit frame */
1547 nsc_ircc_dma_xmit(self, iobase);
1548 }
1549 out:
1550 /* Not busy transmitting anymore if window is not full,
1551 * and if we don't need to change speed */
1552 if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0))
1553 netif_wake_queue(self->netdev);
1554
1555 /* Restore bank register */
1556 outb(bank, iobase+BSR);
1557
1558 dev->trans_start = jiffies;
1559 spin_unlock_irqrestore(&self->lock, flags);
1560 dev_kfree_skb(skb);
1561
1562 return NETDEV_TX_OK;
1563 }
1564
1565 /*
1566 * Function nsc_ircc_dma_xmit (self, iobase)
1567 *
1568 * Transmit data using DMA
1569 *
1570 */
1571 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase)
1572 {
1573 int bsr;
1574
1575 /* Save current bank */
1576 bsr = inb(iobase+BSR);
1577
1578 /* Disable DMA */
1579 switch_bank(iobase, BANK0);
1580 outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1581
1582 self->io.direction = IO_XMIT;
1583
1584 /* Choose transmit DMA channel */
1585 switch_bank(iobase, BANK2);
1586 outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1587
1588 irda_setup_dma(self->io.dma,
1589 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1590 self->tx_buff.head) + self->tx_buff_dma,
1591 self->tx_fifo.queue[self->tx_fifo.ptr].len,
1592 DMA_TX_MODE);
1593
1594 /* Enable DMA and SIR interaction pulse */
1595 switch_bank(iobase, BANK0);
1596 outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR);
1597
1598 /* Restore bank register */
1599 outb(bsr, iobase+BSR);
1600 }
1601
1602 /*
1603 * Function nsc_ircc_pio_xmit (self, iobase)
1604 *
1605 * Transmit data using PIO. Returns the number of bytes that actually
1606 * got transferred
1607 *
1608 */
1609 static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
1610 {
1611 int actual = 0;
1612 __u8 bank;
1613
1614 IRDA_DEBUG(4, "%s()\n", __func__);
1615
1616 /* Save current bank */
1617 bank = inb(iobase+BSR);
1618
1619 switch_bank(iobase, BANK0);
1620 if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
1621 IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n",
1622 __func__);
1623
1624 /* FIFO may still be filled to the Tx interrupt threshold */
1625 fifo_size -= 17;
1626 }
1627
1628 /* Fill FIFO with current frame */
1629 while ((fifo_size-- > 0) && (actual < len)) {
1630 /* Transmit next byte */
1631 outb(buf[actual++], iobase+TXD);
1632 }
1633
1634 IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
1635 __func__, fifo_size, actual, len);
1636
1637 /* Restore bank */
1638 outb(bank, iobase+BSR);
1639
1640 return actual;
1641 }
1642
1643 /*
1644 * Function nsc_ircc_dma_xmit_complete (self)
1645 *
1646 * The transfer of a frame in finished. This function will only be called
1647 * by the interrupt handler
1648 *
1649 */
1650 static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self)
1651 {
1652 int iobase;
1653 __u8 bank;
1654 int ret = TRUE;
1655
1656 IRDA_DEBUG(2, "%s()\n", __func__);
1657
1658 iobase = self->io.fir_base;
1659
1660 /* Save current bank */
1661 bank = inb(iobase+BSR);
1662
1663 /* Disable DMA */
1664 switch_bank(iobase, BANK0);
1665 outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1666
1667 /* Check for underrun! */
1668 if (inb(iobase+ASCR) & ASCR_TXUR) {
1669 self->netdev->stats.tx_errors++;
1670 self->netdev->stats.tx_fifo_errors++;
1671
1672 /* Clear bit, by writing 1 into it */
1673 outb(ASCR_TXUR, iobase+ASCR);
1674 } else {
1675 self->netdev->stats.tx_packets++;
1676 }
1677
1678 /* Finished with this frame, so prepare for next */
1679 self->tx_fifo.ptr++;
1680 self->tx_fifo.len--;
1681
1682 /* Any frames to be sent back-to-back? */
1683 if (self->tx_fifo.len) {
1684 nsc_ircc_dma_xmit(self, iobase);
1685
1686 /* Not finished yet! */
1687 ret = FALSE;
1688 } else {
1689 /* Reset Tx FIFO info */
1690 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1691 self->tx_fifo.tail = self->tx_buff.head;
1692 }
1693
1694 /* Make sure we have room for more frames and
1695 * that we don't need to change speed */
1696 if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) {
1697 /* Not busy transmitting anymore */
1698 /* Tell the network layer, that we can accept more frames */
1699 netif_wake_queue(self->netdev);
1700 }
1701
1702 /* Restore bank */
1703 outb(bank, iobase+BSR);
1704
1705 return ret;
1706 }
1707
1708 /*
1709 * Function nsc_ircc_dma_receive (self)
1710 *
1711 * Get ready for receiving a frame. The device will initiate a DMA
1712 * if it starts to receive a frame.
1713 *
1714 */
1715 static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self)
1716 {
1717 int iobase;
1718 __u8 bsr;
1719
1720 iobase = self->io.fir_base;
1721
1722 /* Reset Tx FIFO info */
1723 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1724 self->tx_fifo.tail = self->tx_buff.head;
1725
1726 /* Save current bank */
1727 bsr = inb(iobase+BSR);
1728
1729 /* Disable DMA */
1730 switch_bank(iobase, BANK0);
1731 outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1732
1733 /* Choose DMA Rx, DMA Fairness, and Advanced mode */
1734 switch_bank(iobase, BANK2);
1735 outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1736
1737 self->io.direction = IO_RECV;
1738 self->rx_buff.data = self->rx_buff.head;
1739
1740 /* Reset Rx FIFO. This will also flush the ST_FIFO */
1741 switch_bank(iobase, BANK0);
1742 outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1743
1744 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1745 self->st_fifo.tail = self->st_fifo.head = 0;
1746
1747 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1748 DMA_RX_MODE);
1749
1750 /* Enable DMA */
1751 switch_bank(iobase, BANK0);
1752 outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR);
1753
1754 /* Restore bank register */
1755 outb(bsr, iobase+BSR);
1756
1757 return 0;
1758 }
1759
1760 /*
1761 * Function nsc_ircc_dma_receive_complete (self)
1762 *
1763 * Finished with receiving frames
1764 *
1765 *
1766 */
1767 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase)
1768 {
1769 struct st_fifo *st_fifo;
1770 struct sk_buff *skb;
1771 __u8 status;
1772 __u8 bank;
1773 int len;
1774
1775 st_fifo = &self->st_fifo;
1776
1777 /* Save current bank */
1778 bank = inb(iobase+BSR);
1779
1780 /* Read all entries in status FIFO */
1781 switch_bank(iobase, BANK5);
1782 while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) {
1783 /* We must empty the status FIFO no matter what */
1784 len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8);
1785
1786 if (st_fifo->tail >= MAX_RX_WINDOW) {
1787 IRDA_DEBUG(0, "%s(), window is full!\n", __func__);
1788 continue;
1789 }
1790
1791 st_fifo->entries[st_fifo->tail].status = status;
1792 st_fifo->entries[st_fifo->tail].len = len;
1793 st_fifo->pending_bytes += len;
1794 st_fifo->tail++;
1795 st_fifo->len++;
1796 }
1797 /* Try to process all entries in status FIFO */
1798 while (st_fifo->len > 0) {
1799 /* Get first entry */
1800 status = st_fifo->entries[st_fifo->head].status;
1801 len = st_fifo->entries[st_fifo->head].len;
1802 st_fifo->pending_bytes -= len;
1803 st_fifo->head++;
1804 st_fifo->len--;
1805
1806 /* Check for errors */
1807 if (status & FRM_ST_ERR_MSK) {
1808 if (status & FRM_ST_LOST_FR) {
1809 /* Add number of lost frames to stats */
1810 self->netdev->stats.rx_errors += len;
1811 } else {
1812 /* Skip frame */
1813 self->netdev->stats.rx_errors++;
1814
1815 self->rx_buff.data += len;
1816
1817 if (status & FRM_ST_MAX_LEN)
1818 self->netdev->stats.rx_length_errors++;
1819
1820 if (status & FRM_ST_PHY_ERR)
1821 self->netdev->stats.rx_frame_errors++;
1822
1823 if (status & FRM_ST_BAD_CRC)
1824 self->netdev->stats.rx_crc_errors++;
1825 }
1826 /* The errors below can be reported in both cases */
1827 if (status & FRM_ST_OVR1)
1828 self->netdev->stats.rx_fifo_errors++;
1829
1830 if (status & FRM_ST_OVR2)
1831 self->netdev->stats.rx_fifo_errors++;
1832 } else {
1833 /*
1834 * First we must make sure that the frame we
1835 * want to deliver is all in main memory. If we
1836 * cannot tell, then we check if the Rx FIFO is
1837 * empty. If not then we will have to take a nap
1838 * and try again later.
1839 */
1840 if (st_fifo->pending_bytes < self->io.fifo_size) {
1841 switch_bank(iobase, BANK0);
1842 if (inb(iobase+LSR) & LSR_RXDA) {
1843 /* Put this entry back in fifo */
1844 st_fifo->head--;
1845 st_fifo->len++;
1846 st_fifo->pending_bytes += len;
1847 st_fifo->entries[st_fifo->head].status = status;
1848 st_fifo->entries[st_fifo->head].len = len;
1849 /*
1850 * DMA not finished yet, so try again
1851 * later, set timer value, resolution
1852 * 125 us
1853 */
1854 switch_bank(iobase, BANK4);
1855 outb(0x02, iobase+TMRL); /* x 125 us */
1856 outb(0x00, iobase+TMRH);
1857
1858 /* Start timer */
1859 outb(IRCR1_TMR_EN, iobase+IRCR1);
1860
1861 /* Restore bank register */
1862 outb(bank, iobase+BSR);
1863
1864 return FALSE; /* I'll be back! */
1865 }
1866 }
1867
1868 /*
1869 * Remember the time we received this frame, so we can
1870 * reduce the min turn time a bit since we will know
1871 * how much time we have used for protocol processing
1872 */
1873 do_gettimeofday(&self->stamp);
1874
1875 skb = dev_alloc_skb(len+1);
1876 if (skb == NULL) {
1877 IRDA_WARNING("%s(), memory squeeze, "
1878 "dropping frame.\n",
1879 __func__);
1880 self->netdev->stats.rx_dropped++;
1881
1882 /* Restore bank register */
1883 outb(bank, iobase+BSR);
1884
1885 return FALSE;
1886 }
1887
1888 /* Make sure IP header gets aligned */
1889 skb_reserve(skb, 1);
1890
1891 /* Copy frame without CRC */
1892 if (self->io.speed < 4000000) {
1893 skb_put(skb, len-2);
1894 skb_copy_to_linear_data(skb,
1895 self->rx_buff.data,
1896 len - 2);
1897 } else {
1898 skb_put(skb, len-4);
1899 skb_copy_to_linear_data(skb,
1900 self->rx_buff.data,
1901 len - 4);
1902 }
1903
1904 /* Move to next frame */
1905 self->rx_buff.data += len;
1906 self->netdev->stats.rx_bytes += len;
1907 self->netdev->stats.rx_packets++;
1908
1909 skb->dev = self->netdev;
1910 skb_reset_mac_header(skb);
1911 skb->protocol = htons(ETH_P_IRDA);
1912 netif_rx(skb);
1913 }
1914 }
1915 /* Restore bank register */
1916 outb(bank, iobase+BSR);
1917
1918 return TRUE;
1919 }
1920
1921 /*
1922 * Function nsc_ircc_pio_receive (self)
1923 *
1924 * Receive all data in receiver FIFO
1925 *
1926 */
1927 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self)
1928 {
1929 __u8 byte;
1930 int iobase;
1931
1932 iobase = self->io.fir_base;
1933
1934 /* Receive all characters in Rx FIFO */
1935 do {
1936 byte = inb(iobase+RXD);
1937 async_unwrap_char(self->netdev, &self->netdev->stats,
1938 &self->rx_buff, byte);
1939 } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */
1940 }
1941
1942 /*
1943 * Function nsc_ircc_sir_interrupt (self, eir)
1944 *
1945 * Handle SIR interrupt
1946 *
1947 */
1948 static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir)
1949 {
1950 int actual;
1951
1952 /* Check if transmit FIFO is low on data */
1953 if (eir & EIR_TXLDL_EV) {
1954 /* Write data left in transmit buffer */
1955 actual = nsc_ircc_pio_write(self->io.fir_base,
1956 self->tx_buff.data,
1957 self->tx_buff.len,
1958 self->io.fifo_size);
1959 self->tx_buff.data += actual;
1960 self->tx_buff.len -= actual;
1961
1962 self->io.direction = IO_XMIT;
1963
1964 /* Check if finished */
1965 if (self->tx_buff.len > 0)
1966 self->ier = IER_TXLDL_IE;
1967 else {
1968
1969 self->netdev->stats.tx_packets++;
1970 netif_wake_queue(self->netdev);
1971 self->ier = IER_TXEMP_IE;
1972 }
1973
1974 }
1975 /* Check if transmission has completed */
1976 if (eir & EIR_TXEMP_EV) {
1977 /* Turn around and get ready to receive some data */
1978 self->io.direction = IO_RECV;
1979 self->ier = IER_RXHDL_IE;
1980 /* Check if we need to change the speed?
1981 * Need to be after self->io.direction to avoid race with
1982 * nsc_ircc_hard_xmit_sir() - Jean II */
1983 if (self->new_speed) {
1984 IRDA_DEBUG(2, "%s(), Changing speed!\n", __func__);
1985 self->ier = nsc_ircc_change_speed(self,
1986 self->new_speed);
1987 self->new_speed = 0;
1988 netif_wake_queue(self->netdev);
1989
1990 /* Check if we are going to FIR */
1991 if (self->io.speed > 115200) {
1992 /* No need to do anymore SIR stuff */
1993 return;
1994 }
1995 }
1996 }
1997
1998 /* Rx FIFO threshold or timeout */
1999 if (eir & EIR_RXHDL_EV) {
2000 nsc_ircc_pio_receive(self);
2001
2002 /* Keep receiving */
2003 self->ier = IER_RXHDL_IE;
2004 }
2005 }
2006
2007 /*
2008 * Function nsc_ircc_fir_interrupt (self, eir)
2009 *
2010 * Handle MIR/FIR interrupt
2011 *
2012 */
2013 static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase,
2014 int eir)
2015 {
2016 __u8 bank;
2017
2018 bank = inb(iobase+BSR);
2019
2020 /* Status FIFO event*/
2021 if (eir & EIR_SFIF_EV) {
2022 /* Check if DMA has finished */
2023 if (nsc_ircc_dma_receive_complete(self, iobase)) {
2024 /* Wait for next status FIFO interrupt */
2025 self->ier = IER_SFIF_IE;
2026 } else {
2027 self->ier = IER_SFIF_IE | IER_TMR_IE;
2028 }
2029 } else if (eir & EIR_TMR_EV) { /* Timer finished */
2030 /* Disable timer */
2031 switch_bank(iobase, BANK4);
2032 outb(0, iobase+IRCR1);
2033
2034 /* Clear timer event */
2035 switch_bank(iobase, BANK0);
2036 outb(ASCR_CTE, iobase+ASCR);
2037
2038 /* Check if this is a Tx timer interrupt */
2039 if (self->io.direction == IO_XMIT) {
2040 nsc_ircc_dma_xmit(self, iobase);
2041
2042 /* Interrupt on DMA */
2043 self->ier = IER_DMA_IE;
2044 } else {
2045 /* Check (again) if DMA has finished */
2046 if (nsc_ircc_dma_receive_complete(self, iobase)) {
2047 self->ier = IER_SFIF_IE;
2048 } else {
2049 self->ier = IER_SFIF_IE | IER_TMR_IE;
2050 }
2051 }
2052 } else if (eir & EIR_DMA_EV) {
2053 /* Finished with all transmissions? */
2054 if (nsc_ircc_dma_xmit_complete(self)) {
2055 if(self->new_speed != 0) {
2056 /* As we stop the Tx queue, the speed change
2057 * need to be done when the Tx fifo is
2058 * empty. Ask for a Tx done interrupt */
2059 self->ier = IER_TXEMP_IE;
2060 } else {
2061 /* Check if there are more frames to be
2062 * transmitted */
2063 if (irda_device_txqueue_empty(self->netdev)) {
2064 /* Prepare for receive */
2065 nsc_ircc_dma_receive(self);
2066 self->ier = IER_SFIF_IE;
2067 } else
2068 IRDA_WARNING("%s(), potential "
2069 "Tx queue lockup !\n",
2070 __func__);
2071 }
2072 } else {
2073 /* Not finished yet, so interrupt on DMA again */
2074 self->ier = IER_DMA_IE;
2075 }
2076 } else if (eir & EIR_TXEMP_EV) {
2077 /* The Tx FIFO has totally drained out, so now we can change
2078 * the speed... - Jean II */
2079 self->ier = nsc_ircc_change_speed(self, self->new_speed);
2080 self->new_speed = 0;
2081 netif_wake_queue(self->netdev);
2082 /* Note : nsc_ircc_change_speed() restarted Rx fifo */
2083 }
2084
2085 outb(bank, iobase+BSR);
2086 }
2087
2088 /*
2089 * Function nsc_ircc_interrupt (irq, dev_id, regs)
2090 *
2091 * An interrupt from the chip has arrived. Time to do some work
2092 *
2093 */
2094 static irqreturn_t nsc_ircc_interrupt(int irq, void *dev_id)
2095 {
2096 struct net_device *dev = dev_id;
2097 struct nsc_ircc_cb *self;
2098 __u8 bsr, eir;
2099 int iobase;
2100
2101 self = netdev_priv(dev);
2102
2103 spin_lock(&self->lock);
2104
2105 iobase = self->io.fir_base;
2106
2107 bsr = inb(iobase+BSR); /* Save current bank */
2108
2109 switch_bank(iobase, BANK0);
2110 self->ier = inb(iobase+IER);
2111 eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */
2112
2113 outb(0, iobase+IER); /* Disable interrupts */
2114
2115 if (eir) {
2116 /* Dispatch interrupt handler for the current speed */
2117 if (self->io.speed > 115200)
2118 nsc_ircc_fir_interrupt(self, iobase, eir);
2119 else
2120 nsc_ircc_sir_interrupt(self, eir);
2121 }
2122
2123 outb(self->ier, iobase+IER); /* Restore interrupts */
2124 outb(bsr, iobase+BSR); /* Restore bank register */
2125
2126 spin_unlock(&self->lock);
2127 return IRQ_RETVAL(eir);
2128 }
2129
2130 /*
2131 * Function nsc_ircc_is_receiving (self)
2132 *
2133 * Return TRUE is we are currently receiving a frame
2134 *
2135 */
2136 static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self)
2137 {
2138 unsigned long flags;
2139 int status = FALSE;
2140 int iobase;
2141 __u8 bank;
2142
2143 IRDA_ASSERT(self != NULL, return FALSE;);
2144
2145 spin_lock_irqsave(&self->lock, flags);
2146
2147 if (self->io.speed > 115200) {
2148 iobase = self->io.fir_base;
2149
2150 /* Check if rx FIFO is not empty */
2151 bank = inb(iobase+BSR);
2152 switch_bank(iobase, BANK2);
2153 if ((inb(iobase+RXFLV) & 0x3f) != 0) {
2154 /* We are receiving something */
2155 status = TRUE;
2156 }
2157 outb(bank, iobase+BSR);
2158 } else
2159 status = (self->rx_buff.state != OUTSIDE_FRAME);
2160
2161 spin_unlock_irqrestore(&self->lock, flags);
2162
2163 return status;
2164 }
2165
2166 /*
2167 * Function nsc_ircc_net_open (dev)
2168 *
2169 * Start the device
2170 *
2171 */
2172 static int nsc_ircc_net_open(struct net_device *dev)
2173 {
2174 struct nsc_ircc_cb *self;
2175 int iobase;
2176 char hwname[32];
2177 __u8 bank;
2178
2179 IRDA_DEBUG(4, "%s()\n", __func__);
2180
2181 IRDA_ASSERT(dev != NULL, return -1;);
2182 self = netdev_priv(dev);
2183
2184 IRDA_ASSERT(self != NULL, return 0;);
2185
2186 iobase = self->io.fir_base;
2187
2188 if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) {
2189 IRDA_WARNING("%s, unable to allocate irq=%d\n",
2190 driver_name, self->io.irq);
2191 return -EAGAIN;
2192 }
2193 /*
2194 * Always allocate the DMA channel after the IRQ, and clean up on
2195 * failure.
2196 */
2197 if (request_dma(self->io.dma, dev->name)) {
2198 IRDA_WARNING("%s, unable to allocate dma=%d\n",
2199 driver_name, self->io.dma);
2200 free_irq(self->io.irq, dev);
2201 return -EAGAIN;
2202 }
2203
2204 /* Save current bank */
2205 bank = inb(iobase+BSR);
2206
2207 /* turn on interrupts */
2208 switch_bank(iobase, BANK0);
2209 outb(IER_LS_IE | IER_RXHDL_IE, iobase+IER);
2210
2211 /* Restore bank register */
2212 outb(bank, iobase+BSR);
2213
2214 /* Ready to play! */
2215 netif_start_queue(dev);
2216
2217 /* Give self a hardware name */
2218 sprintf(hwname, "NSC-FIR @ 0x%03x", self->io.fir_base);
2219
2220 /*
2221 * Open new IrLAP layer instance, now that everything should be
2222 * initialized properly
2223 */
2224 self->irlap = irlap_open(dev, &self->qos, hwname);
2225
2226 return 0;
2227 }
2228
2229 /*
2230 * Function nsc_ircc_net_close (dev)
2231 *
2232 * Stop the device
2233 *
2234 */
2235 static int nsc_ircc_net_close(struct net_device *dev)
2236 {
2237 struct nsc_ircc_cb *self;
2238 int iobase;
2239 __u8 bank;
2240
2241 IRDA_DEBUG(4, "%s()\n", __func__);
2242
2243 IRDA_ASSERT(dev != NULL, return -1;);
2244
2245 self = netdev_priv(dev);
2246 IRDA_ASSERT(self != NULL, return 0;);
2247
2248 /* Stop device */
2249 netif_stop_queue(dev);
2250
2251 /* Stop and remove instance of IrLAP */
2252 if (self->irlap)
2253 irlap_close(self->irlap);
2254 self->irlap = NULL;
2255
2256 iobase = self->io.fir_base;
2257
2258 disable_dma(self->io.dma);
2259
2260 /* Save current bank */
2261 bank = inb(iobase+BSR);
2262
2263 /* Disable interrupts */
2264 switch_bank(iobase, BANK0);
2265 outb(0, iobase+IER);
2266
2267 free_irq(self->io.irq, dev);
2268 free_dma(self->io.dma);
2269
2270 /* Restore bank register */
2271 outb(bank, iobase+BSR);
2272
2273 return 0;
2274 }
2275
2276 /*
2277 * Function nsc_ircc_net_ioctl (dev, rq, cmd)
2278 *
2279 * Process IOCTL commands for this device
2280 *
2281 */
2282 static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2283 {
2284 struct if_irda_req *irq = (struct if_irda_req *) rq;
2285 struct nsc_ircc_cb *self;
2286 unsigned long flags;
2287 int ret = 0;
2288
2289 IRDA_ASSERT(dev != NULL, return -1;);
2290
2291 self = netdev_priv(dev);
2292
2293 IRDA_ASSERT(self != NULL, return -1;);
2294
2295 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
2296
2297 switch (cmd) {
2298 case SIOCSBANDWIDTH: /* Set bandwidth */
2299 if (!capable(CAP_NET_ADMIN)) {
2300 ret = -EPERM;
2301 break;
2302 }
2303 spin_lock_irqsave(&self->lock, flags);
2304 nsc_ircc_change_speed(self, irq->ifr_baudrate);
2305 spin_unlock_irqrestore(&self->lock, flags);
2306 break;
2307 case SIOCSMEDIABUSY: /* Set media busy */
2308 if (!capable(CAP_NET_ADMIN)) {
2309 ret = -EPERM;
2310 break;
2311 }
2312 irda_device_set_media_busy(self->netdev, TRUE);
2313 break;
2314 case SIOCGRECEIVING: /* Check if we are receiving right now */
2315 /* This is already protected */
2316 irq->ifr_receiving = nsc_ircc_is_receiving(self);
2317 break;
2318 default:
2319 ret = -EOPNOTSUPP;
2320 }
2321 return ret;
2322 }
2323
2324 static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
2325 {
2326 struct nsc_ircc_cb *self = platform_get_drvdata(dev);
2327 int bank;
2328 unsigned long flags;
2329 int iobase = self->io.fir_base;
2330
2331 if (self->io.suspended)
2332 return 0;
2333
2334 IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
2335
2336 rtnl_lock();
2337 if (netif_running(self->netdev)) {
2338 netif_device_detach(self->netdev);
2339 spin_lock_irqsave(&self->lock, flags);
2340 /* Save current bank */
2341 bank = inb(iobase+BSR);
2342
2343 /* Disable interrupts */
2344 switch_bank(iobase, BANK0);
2345 outb(0, iobase+IER);
2346
2347 /* Restore bank register */
2348 outb(bank, iobase+BSR);
2349
2350 spin_unlock_irqrestore(&self->lock, flags);
2351 free_irq(self->io.irq, self->netdev);
2352 disable_dma(self->io.dma);
2353 }
2354 self->io.suspended = 1;
2355 rtnl_unlock();
2356
2357 return 0;
2358 }
2359
2360 static int nsc_ircc_resume(struct platform_device *dev)
2361 {
2362 struct nsc_ircc_cb *self = platform_get_drvdata(dev);
2363 unsigned long flags;
2364
2365 if (!self->io.suspended)
2366 return 0;
2367
2368 IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
2369
2370 rtnl_lock();
2371 nsc_ircc_setup(&self->io);
2372 nsc_ircc_init_dongle_interface(self->io.fir_base, self->io.dongle_id);
2373
2374 if (netif_running(self->netdev)) {
2375 if (request_irq(self->io.irq, nsc_ircc_interrupt, 0,
2376 self->netdev->name, self->netdev)) {
2377 IRDA_WARNING("%s, unable to allocate irq=%d\n",
2378 driver_name, self->io.irq);
2379
2380 /*
2381 * Don't fail resume process, just kill this
2382 * network interface
2383 */
2384 unregister_netdevice(self->netdev);
2385 } else {
2386 spin_lock_irqsave(&self->lock, flags);
2387 nsc_ircc_change_speed(self, self->io.speed);
2388 spin_unlock_irqrestore(&self->lock, flags);
2389 netif_device_attach(self->netdev);
2390 }
2391
2392 } else {
2393 spin_lock_irqsave(&self->lock, flags);
2394 nsc_ircc_change_speed(self, 9600);
2395 spin_unlock_irqrestore(&self->lock, flags);
2396 }
2397 self->io.suspended = 0;
2398 rtnl_unlock();
2399
2400 return 0;
2401 }
2402
2403 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2404 MODULE_DESCRIPTION("NSC IrDA Device Driver");
2405 MODULE_LICENSE("GPL");
2406
2407
2408 module_param(qos_mtt_bits, int, 0);
2409 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
2410 module_param_array(io, int, NULL, 0);
2411 MODULE_PARM_DESC(io, "Base I/O addresses");
2412 module_param_array(irq, int, NULL, 0);
2413 MODULE_PARM_DESC(irq, "IRQ lines");
2414 module_param_array(dma, int, NULL, 0);
2415 MODULE_PARM_DESC(dma, "DMA channels");
2416 module_param(dongle_id, int, 0);
2417 MODULE_PARM_DESC(dongle_id, "Type-id of used dongle");
2418
2419 module_init(nsc_ircc_init);
2420 module_exit(nsc_ircc_cleanup);
2421
Ubuntu Jammy Linux kernel mirror