tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/********************************************************************
2 Filename: via-ircc.c
3 Version: 1.0
4 Description: Driver for the VIA VT8231/VT8233 IrDA chipsets
5 Author: VIA Technologies,inc
6 Date : 08/06/2003
7
8Copyright (c) 1998-2003 VIA Technologies, Inc.
9
10This program is free software; you can redistribute it and/or modify it under
11the terms of the GNU General Public License as published by the Free Software
12Foundation; either version 2, or (at your option) any later version.
13
14This program is distributed in the hope that it will be useful, but WITHOUT
15ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17See the GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License along with
20this program; if not, write to the Free Software Foundation, Inc.,
2159 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22
23F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
24F02 Oct/28/02: Add SB device ID for 3147 and 3177.
25 Comment :
26 jul/09/2002 : only implement two kind of dongle currently.
27 Oct/02/2002 : work on VT8231 and VT8233 .
28 Aug/06/2003 : change driver format to pci driver .
29
302004-02-16: <sda@bdit.de>
31- Removed unneeded 'legacy' pci stuff.
32- Make sure SIR mode is set (hw_init()) before calling mode-dependant stuff.
33- On speed change from core, don't send SIR frame with new speed.
34 Use current speed and change speeds later.
35- Make module-param dongle_id actually work.
36- New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only.
37 Tested with home-grown PCB on EPIA boards.
38- Code cleanup.
39
40 ********************************************************************/
41#include <linux/module.h>
42#include <linux/kernel.h>
43#include <linux/types.h>
44#include <linux/skbuff.h>
45#include <linux/netdevice.h>
46#include <linux/ioport.h>
47#include <linux/delay.h>
48#include <linux/slab.h>
49#include <linux/init.h>
50#include <linux/rtnetlink.h>
51#include <linux/pci.h>
52#include <linux/dma-mapping.h>
53
54#include <asm/io.h>
55#include <asm/dma.h>
56#include <asm/byteorder.h>
57
58#include <linux/pm.h>
59
60#include <net/irda/wrapper.h>
61#include <net/irda/irda.h>
62#include <net/irda/irda_device.h>
63
64#include "via-ircc.h"
65
66#define VIA_MODULE_NAME "via-ircc"
67#define CHIP_IO_EXTENT 0x40
68
69static char *driver_name = VIA_MODULE_NAME;
70
71/* Module parameters */
72static int qos_mtt_bits = 0x07; /* 1 ms or more */
73static int dongle_id = 0; /* default: probe */
74
75/* We can't guess the type of connected dongle, user *must* supply it. */
76module_param(dongle_id, int, 0);
77
78/* FIXME : we should not need this, because instances should be automatically
79 * managed by the PCI layer. Especially that we seem to only be using the
80 * first entry. Jean II */
81/* Max 4 instances for now */
82static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
83
84/* Some prototypes */
85static int via_ircc_open(int i, chipio_t * info, unsigned int id);
86static int via_ircc_close(struct via_ircc_cb *self);
87static int via_ircc_dma_receive(struct via_ircc_cb *self);
88static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
89 int iobase);
90static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
91 struct net_device *dev);
92static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
93 struct net_device *dev);
94static void via_hw_init(struct via_ircc_cb *self);
95static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
96static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
97static int via_ircc_is_receiving(struct via_ircc_cb *self);
98static int via_ircc_read_dongle_id(int iobase);
99
100static int via_ircc_net_open(struct net_device *dev);
101static int via_ircc_net_close(struct net_device *dev);
102static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
103 int cmd);
104static struct net_device_stats *via_ircc_net_get_stats(struct net_device
105 *dev);
106static void via_ircc_change_dongle_speed(int iobase, int speed,
107 int dongle_id);
108static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
109static void hwreset(struct via_ircc_cb *self);
110static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
111static int upload_rxdata(struct via_ircc_cb *self, int iobase);
112static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id);
113static void __devexit via_remove_one (struct pci_dev *pdev);
114
115/* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
116static void iodelay(int udelay)
117{
118 u8 data;
119 int i;
120
121 for (i = 0; i < udelay; i++) {
122 data = inb(0x80);
123 }
124}
125
126static struct pci_device_id via_pci_tbl[] = {
127 { PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
128 { PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
129 { PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
130 { PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
131 { PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
132 { 0, }
133};
134
135MODULE_DEVICE_TABLE(pci,via_pci_tbl);
136
137
138static struct pci_driver via_driver = {
139 .name = VIA_MODULE_NAME,
140 .id_table = via_pci_tbl,
141 .probe = via_init_one,
142 .remove = __devexit_p(via_remove_one),
143};
144
145
146/*
147 * Function via_ircc_init ()
148 *
149 * Initialize chip. Just find out chip type and resource.
150 */
151static int __init via_ircc_init(void)
152{
153 int rc;
154
155 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
156
157 rc = pci_register_driver(&via_driver);
158 if (rc < 0) {
159 IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n",
160 __FUNCTION__, rc);
161 return -ENODEV;
162 }
163 return 0;
164}
165
166static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id)
167{
168 int rc;
169 u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
170 u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
171 chipio_t info;
172
173 IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __FUNCTION__, id->device);
174
175 rc = pci_enable_device (pcidev);
176 if (rc) {
177 IRDA_DEBUG(0, "%s(): error rc = %d\n", __FUNCTION__, rc);
178 return -ENODEV;
179 }
180
181 // South Bridge exist
182 if ( ReadLPCReg(0x20) != 0x3C )
183 Chipset=0x3096;
184 else
185 Chipset=0x3076;
186
187 if (Chipset==0x3076) {
188 IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __FUNCTION__);
189
190 WriteLPCReg(7,0x0c );
191 temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
192 if((temp&0x01)==1) { // BIOS close or no FIR
193 WriteLPCReg(0x1d, 0x82 );
194 WriteLPCReg(0x23,0x18);
195 temp=ReadLPCReg(0xF0);
196 if((temp&0x01)==0) {
197 temp=(ReadLPCReg(0x74)&0x03); //DMA
198 FirDRQ0=temp + 4;
199 temp=(ReadLPCReg(0x74)&0x0C) >> 2;
200 FirDRQ1=temp + 4;
201 } else {
202 temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA
203 FirDRQ0=temp + 4;
204 FirDRQ1=FirDRQ0;
205 }
206 FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ
207 FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte
208 FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte
209 FirIOBase=FirIOBase ;
210 info.fir_base=FirIOBase;
211 info.irq=FirIRQ;
212 info.dma=FirDRQ1;
213 info.dma2=FirDRQ0;
214 pci_read_config_byte(pcidev,0x40,&bTmp);
215 pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
216 pci_read_config_byte(pcidev,0x42,&bTmp);
217 pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
218 pci_write_config_byte(pcidev,0x5a,0xc0);
219 WriteLPCReg(0x28, 0x70 );
220 if (via_ircc_open(0, &info,0x3076) == 0)
221 rc=0;
222 } else
223 rc = -ENODEV; //IR not turn on
224 } else { //Not VT1211
225 IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __FUNCTION__);
226
227 pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
228 if((bTmp&0x01)==1) { // BIOS enable FIR
229 //Enable Double DMA clock
230 pci_read_config_byte(pcidev,0x42,&oldPCI_40);
231 pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
232 pci_read_config_byte(pcidev,0x40,&oldPCI_40);
233 pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
234 pci_read_config_byte(pcidev,0x44,&oldPCI_44);
235 pci_write_config_byte(pcidev,0x44,0x4e);
236 //---------- read configuration from Function0 of south bridge
237 if((bTmp&0x02)==0) {
238 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
239 FirDRQ0 = (bTmp1 & 0x30) >> 4;
240 pci_read_config_byte(pcidev,0x44,&bTmp1);
241 FirDRQ1 = (bTmp1 & 0xc0) >> 6;
242 } else {
243 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
244 FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
245 FirDRQ1=0;
246 }
247 pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ
248 FirIRQ = bTmp1 & 0x0f;
249
250 pci_read_config_byte(pcidev,0x69,&bTmp);
251 FirIOBase = bTmp << 8;//hight byte
252 pci_read_config_byte(pcidev,0x68,&bTmp);
253 FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
254 //-------------------------
255 info.fir_base=FirIOBase;
256 info.irq=FirIRQ;
257 info.dma=FirDRQ1;
258 info.dma2=FirDRQ0;
259 if (via_ircc_open(0, &info,0x3096) == 0)
260 rc=0;
261 } else
262 rc = -ENODEV; //IR not turn on !!!!!
263 }//Not VT1211
264
265 IRDA_DEBUG(2, "%s(): End - rc = %d\n", __FUNCTION__, rc);
266 return rc;
267}
268
269/*
270 * Function via_ircc_clean ()
271 *
272 * Close all configured chips
273 *
274 */
275static void via_ircc_clean(void)
276{
277 int i;
278
279 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
280
281 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
282 if (dev_self[i])
283 via_ircc_close(dev_self[i]);
284 }
285}
286
287static void __devexit via_remove_one (struct pci_dev *pdev)
288{
289 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
290
291 /* FIXME : This is ugly. We should use pci_get_drvdata(pdev);
292 * to get our driver instance and call directly via_ircc_close().
293 * See vlsi_ir for details...
294 * Jean II */
295 via_ircc_clean();
296
297 /* FIXME : This should be in via_ircc_close(), because here we may
298 * theoritically disable still configured devices :-( - Jean II */
299 pci_disable_device(pdev);
300}
301
302static void __exit via_ircc_cleanup(void)
303{
304 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
305
306 /* FIXME : This should be redundant, as pci_unregister_driver()
307 * should call via_remove_one() on each device.
308 * Jean II */
309 via_ircc_clean();
310
311 /* Cleanup all instances of the driver */
312 pci_unregister_driver (&via_driver);
313}
314
315/*
316 * Function via_ircc_open (iobase, irq)
317 *
318 * Open driver instance
319 *
320 */
321static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
322{
323 struct net_device *dev;
324 struct via_ircc_cb *self;
325 int err;
326
327 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
328
329 if (i >= ARRAY_SIZE(dev_self))
330 return -ENOMEM;
331
332 /* Allocate new instance of the driver */
333 dev = alloc_irdadev(sizeof(struct via_ircc_cb));
334 if (dev == NULL)
335 return -ENOMEM;
336
337 self = dev->priv;
338 self->netdev = dev;
339 spin_lock_init(&self->lock);
340
341 /* FIXME : We should store our driver instance in the PCI layer,
342 * using pci_set_drvdata(), not in this array.
343 * See vlsi_ir for details... - Jean II */
344 /* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */
345 /* Need to store self somewhere */
346 dev_self[i] = self;
347 self->index = i;
348 /* Initialize Resource */
349 self->io.cfg_base = info->cfg_base;
350 self->io.fir_base = info->fir_base;
351 self->io.irq = info->irq;
352 self->io.fir_ext = CHIP_IO_EXTENT;
353 self->io.dma = info->dma;
354 self->io.dma2 = info->dma2;
355 self->io.fifo_size = 32;
356 self->chip_id = id;
357 self->st_fifo.len = 0;
358 self->RxDataReady = 0;
359
360 /* Reserve the ioports that we need */
361 if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
362 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
363 __FUNCTION__, self->io.fir_base);
364 err = -ENODEV;
365 goto err_out1;
366 }
367
368 /* Initialize QoS for this device */
369 irda_init_max_qos_capabilies(&self->qos);
370
371 /* Check if user has supplied the dongle id or not */
372 if (!dongle_id)
373 dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
374 self->io.dongle_id = dongle_id;
375
376 /* The only value we must override it the baudrate */
377 /* Maximum speeds and capabilities are dongle-dependant. */
378 switch( self->io.dongle_id ){
379 case 0x0d:
380 self->qos.baud_rate.bits =
381 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
382 IR_576000 | IR_1152000 | (IR_4000000 << 8);
383 break;
384 default:
385 self->qos.baud_rate.bits =
386 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
387 break;
388 }
389
390 /* Following was used for testing:
391 *
392 * self->qos.baud_rate.bits = IR_9600;
393 *
394 * Is is no good, as it prohibits (error-prone) speed-changes.
395 */
396
397 self->qos.min_turn_time.bits = qos_mtt_bits;
398 irda_qos_bits_to_value(&self->qos);
399
400 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
401 self->rx_buff.truesize = 14384 + 2048;
402 self->tx_buff.truesize = 14384 + 2048;
403
404 /* Allocate memory if needed */
405 self->rx_buff.head =
406 dma_alloc_coherent(NULL, self->rx_buff.truesize,
407 &self->rx_buff_dma, GFP_KERNEL);
408 if (self->rx_buff.head == NULL) {
409 err = -ENOMEM;
410 goto err_out2;
411 }
412 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
413
414 self->tx_buff.head =
415 dma_alloc_coherent(NULL, self->tx_buff.truesize,
416 &self->tx_buff_dma, GFP_KERNEL);
417 if (self->tx_buff.head == NULL) {
418 err = -ENOMEM;
419 goto err_out3;
420 }
421 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
422
423 self->rx_buff.in_frame = FALSE;
424 self->rx_buff.state = OUTSIDE_FRAME;
425 self->tx_buff.data = self->tx_buff.head;
426 self->rx_buff.data = self->rx_buff.head;
427
428 /* Reset Tx queue info */
429 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
430 self->tx_fifo.tail = self->tx_buff.head;
431
432 /* Override the network functions we need to use */
433 dev->hard_start_xmit = via_ircc_hard_xmit_sir;
434 dev->open = via_ircc_net_open;
435 dev->stop = via_ircc_net_close;
436 dev->do_ioctl = via_ircc_net_ioctl;
437 dev->get_stats = via_ircc_net_get_stats;
438
439 err = register_netdev(dev);
440 if (err)
441 goto err_out4;
442
443 IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);
444
445 /* Initialise the hardware..
446 */
447 self->io.speed = 9600;
448 via_hw_init(self);
449 return 0;
450 err_out4:
451 dma_free_coherent(NULL, self->tx_buff.truesize,
452 self->tx_buff.head, self->tx_buff_dma);
453 err_out3:
454 dma_free_coherent(NULL, self->rx_buff.truesize,
455 self->rx_buff.head, self->rx_buff_dma);
456 err_out2:
457 release_region(self->io.fir_base, self->io.fir_ext);
458 err_out1:
459 free_netdev(dev);
460 dev_self[i] = NULL;
461 return err;
462}
463
464/*
465 * Function via_ircc_close (self)
466 *
467 * Close driver instance
468 *
469 */
470static int via_ircc_close(struct via_ircc_cb *self)
471{
472 int iobase;
473
474 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
475
476 IRDA_ASSERT(self != NULL, return -1;);
477
478 iobase = self->io.fir_base;
479
480 ResetChip(iobase, 5); //hardware reset.
481 /* Remove netdevice */
482 unregister_netdev(self->netdev);
483
484 /* Release the PORT that this driver is using */
485 IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
486 __FUNCTION__, self->io.fir_base);
487 release_region(self->io.fir_base, self->io.fir_ext);
488 if (self->tx_buff.head)
489 dma_free_coherent(NULL, self->tx_buff.truesize,
490 self->tx_buff.head, self->tx_buff_dma);
491 if (self->rx_buff.head)
492 dma_free_coherent(NULL, self->rx_buff.truesize,
493 self->rx_buff.head, self->rx_buff_dma);
494 dev_self[self->index] = NULL;
495
496 free_netdev(self->netdev);
497
498 return 0;
499}
500
501/*
502 * Function via_hw_init(self)
503 *
504 * Returns non-negative on success.
505 *
506 * Formerly via_ircc_setup
507 */
508static void via_hw_init(struct via_ircc_cb *self)
509{
510 int iobase = self->io.fir_base;
511
512 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
513
514 SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095
515 // FIFO Init
516 EnRXFIFOReadyInt(iobase, OFF);
517 EnRXFIFOHalfLevelInt(iobase, OFF);
518 EnTXFIFOHalfLevelInt(iobase, OFF);
519 EnTXFIFOUnderrunEOMInt(iobase, ON);
520 EnTXFIFOReadyInt(iobase, OFF);
521 InvertTX(iobase, OFF);
522 InvertRX(iobase, OFF);
523
524 if (ReadLPCReg(0x20) == 0x3c)
525 WriteLPCReg(0xF0, 0); // for VT1211
526 /* Int Init */
527 EnRXSpecInt(iobase, ON);
528
529 /* The following is basically hwreset */
530 /* If this is the case, why not just call hwreset() ? Jean II */
531 ResetChip(iobase, 5);
532 EnableDMA(iobase, OFF);
533 EnableTX(iobase, OFF);
534 EnableRX(iobase, OFF);
535 EnRXDMA(iobase, OFF);
536 EnTXDMA(iobase, OFF);
537 RXStart(iobase, OFF);
538 TXStart(iobase, OFF);
539 InitCard(iobase);
540 CommonInit(iobase);
541 SIRFilter(iobase, ON);
542 SetSIR(iobase, ON);
543 CRC16(iobase, ON);
544 EnTXCRC(iobase, 0);
545 WriteReg(iobase, I_ST_CT_0, 0x00);
546 SetBaudRate(iobase, 9600);
547 SetPulseWidth(iobase, 12);
548 SetSendPreambleCount(iobase, 0);
549
550 self->io.speed = 9600;
551 self->st_fifo.len = 0;
552
553 via_ircc_change_dongle_speed(iobase, self->io.speed,
554 self->io.dongle_id);
555
556 WriteReg(iobase, I_ST_CT_0, 0x80);
557}
558
559/*
560 * Function via_ircc_read_dongle_id (void)
561 *
562 */
563static int via_ircc_read_dongle_id(int iobase)
564{
565 int dongle_id = 9; /* Default to IBM */
566
567 IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
568 return dongle_id;
569}
570
571/*
572 * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
573 * Change speed of the attach dongle
574 * only implement two type of dongle currently.
575 */
576static void via_ircc_change_dongle_speed(int iobase, int speed,
577 int dongle_id)
578{
579 u8 mode = 0;
580
581 /* speed is unused, as we use IsSIROn()/IsMIROn() */
582 speed = speed;
583
584 IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
585 __FUNCTION__, speed, iobase, dongle_id);
586
587 switch (dongle_id) {
588
589 /* Note: The dongle_id's listed here are derived from
590 * nsc-ircc.c */
591
592 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
593 UseOneRX(iobase, ON); // use one RX pin RX1,RX2
594 InvertTX(iobase, OFF);
595 InvertRX(iobase, OFF);
596
597 EnRX2(iobase, ON); //sir to rx2
598 EnGPIOtoRX2(iobase, OFF);
599
600 if (IsSIROn(iobase)) { //sir
601 // Mode select Off
602 SlowIRRXLowActive(iobase, ON);
603 udelay(1000);
604 SlowIRRXLowActive(iobase, OFF);
605 } else {
606 if (IsMIROn(iobase)) { //mir
607 // Mode select On
608 SlowIRRXLowActive(iobase, OFF);
609 udelay(20);
610 } else { // fir
611 if (IsFIROn(iobase)) { //fir
612 // Mode select On
613 SlowIRRXLowActive(iobase, OFF);
614 udelay(20);
615 }
616 }
617 }
618 break;
619
620 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
621 UseOneRX(iobase, ON); //use ONE RX....RX1
622 InvertTX(iobase, OFF);
623 InvertRX(iobase, OFF); // invert RX pin
624
625 EnRX2(iobase, ON);
626 EnGPIOtoRX2(iobase, OFF);
627 if (IsSIROn(iobase)) { //sir
628 // Mode select On
629 SlowIRRXLowActive(iobase, ON);
630 udelay(20);
631 // Mode select Off
632 SlowIRRXLowActive(iobase, OFF);
633 }
634 if (IsMIROn(iobase)) { //mir
635 // Mode select On
636 SlowIRRXLowActive(iobase, OFF);
637 udelay(20);
638 // Mode select Off
639 SlowIRRXLowActive(iobase, ON);
640 } else { // fir
641 if (IsFIROn(iobase)) { //fir
642 // Mode select On
643 SlowIRRXLowActive(iobase, OFF);
644 // TX On
645 WriteTX(iobase, ON);
646 udelay(20);
647 // Mode select OFF
648 SlowIRRXLowActive(iobase, ON);
649 udelay(20);
650 // TX Off
651 WriteTX(iobase, OFF);
652 }
653 }
654 break;
655
656 case 0x0d:
657 UseOneRX(iobase, OFF); // use two RX pin RX1,RX2
658 InvertTX(iobase, OFF);
659 InvertRX(iobase, OFF);
660 SlowIRRXLowActive(iobase, OFF);
661 if (IsSIROn(iobase)) { //sir
662 EnGPIOtoRX2(iobase, OFF);
663 WriteGIO(iobase, OFF);
664 EnRX2(iobase, OFF); //sir to rx2
665 } else { // fir mir
666 EnGPIOtoRX2(iobase, OFF);
667 WriteGIO(iobase, OFF);
668 EnRX2(iobase, OFF); //fir to rx
669 }
670 break;
671
672 case 0x11: /* Temic TFDS4500 */
673
674 IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __FUNCTION__);
675
676 UseOneRX(iobase, ON); //use ONE RX....RX1
677 InvertTX(iobase, OFF);
678 InvertRX(iobase, ON); // invert RX pin
679
680 EnRX2(iobase, ON); //sir to rx2
681 EnGPIOtoRX2(iobase, OFF);
682
683 if( IsSIROn(iobase) ){ //sir
684
685 // Mode select On
686 SlowIRRXLowActive(iobase, ON);
687 udelay(20);
688 // Mode select Off
689 SlowIRRXLowActive(iobase, OFF);
690
691 } else{
692 IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __FUNCTION__);
693 }
694 break;
695
696 case 0x0ff: /* Vishay */
697 if (IsSIROn(iobase))
698 mode = 0;
699 else if (IsMIROn(iobase))
700 mode = 1;
701 else if (IsFIROn(iobase))
702 mode = 2;
703 else if (IsVFIROn(iobase))
704 mode = 5; //VFIR-16
705 SI_SetMode(iobase, mode);
706 break;
707
708 default:
709 IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
710 __FUNCTION__, dongle_id);
711 }
712}
713
714/*
715 * Function via_ircc_change_speed (self, baud)
716 *
717 * Change the speed of the device
718 *
719 */
720static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
721{
722 struct net_device *dev = self->netdev;
723 u16 iobase;
724 u8 value = 0, bTmp;
725
726 iobase = self->io.fir_base;
727 /* Update accounting for new speed */
728 self->io.speed = speed;
729 IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __FUNCTION__, speed);
730
731 WriteReg(iobase, I_ST_CT_0, 0x0);
732
733 /* Controller mode sellection */
734 switch (speed) {
735 case 2400:
736 case 9600:
737 case 19200:
738 case 38400:
739 case 57600:
740 case 115200:
741 value = (115200/speed)-1;
742 SetSIR(iobase, ON);
743 CRC16(iobase, ON);
744 break;
745 case 576000:
746 /* FIXME: this can't be right, as it's the same as 115200,
747 * and 576000 is MIR, not SIR. */
748 value = 0;
749 SetSIR(iobase, ON);
750 CRC16(iobase, ON);
751 break;
752 case 1152000:
753 value = 0;
754 SetMIR(iobase, ON);
755 /* FIXME: CRC ??? */
756 break;
757 case 4000000:
758 value = 0;
759 SetFIR(iobase, ON);
760 SetPulseWidth(iobase, 0);
761 SetSendPreambleCount(iobase, 14);
762 CRC16(iobase, OFF);
763 EnTXCRC(iobase, ON);
764 break;
765 case 16000000:
766 value = 0;
767 SetVFIR(iobase, ON);
768 /* FIXME: CRC ??? */
769 break;
770 default:
771 value = 0;
772 break;
773 }
774
775 /* Set baudrate to 0x19[2..7] */
776 bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
777 bTmp |= value << 2;
778 WriteReg(iobase, I_CF_H_1, bTmp);
779
780 /* Some dongles may need to be informed about speed changes. */
781 via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
782
783 /* Set FIFO size to 64 */
784 SetFIFO(iobase, 64);
785
786 /* Enable IR */
787 WriteReg(iobase, I_ST_CT_0, 0x80);
788
789 // EnTXFIFOHalfLevelInt(iobase,ON);
790
791 /* Enable some interrupts so we can receive frames */
792 //EnAllInt(iobase,ON);
793
794 if (IsSIROn(iobase)) {
795 SIRFilter(iobase, ON);
796 SIRRecvAny(iobase, ON);
797 } else {
798 SIRFilter(iobase, OFF);
799 SIRRecvAny(iobase, OFF);
800 }
801
802 if (speed > 115200) {
803 /* Install FIR xmit handler */
804 dev->hard_start_xmit = via_ircc_hard_xmit_fir;
805 via_ircc_dma_receive(self);
806 } else {
807 /* Install SIR xmit handler */
808 dev->hard_start_xmit = via_ircc_hard_xmit_sir;
809 }
810 netif_wake_queue(dev);
811}
812
813/*
814 * Function via_ircc_hard_xmit (skb, dev)
815 *
816 * Transmit the frame!
817 *
818 */
819static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
820 struct net_device *dev)
821{
822 struct via_ircc_cb *self;
823 unsigned long flags;
824 u16 iobase;
825 __u32 speed;
826
827 self = (struct via_ircc_cb *) dev->priv;
828 IRDA_ASSERT(self != NULL, return 0;);
829 iobase = self->io.fir_base;
830
831 netif_stop_queue(dev);
832 /* Check if we need to change the speed */
833 speed = irda_get_next_speed(skb);
834 if ((speed != self->io.speed) && (speed != -1)) {
835 /* Check for empty frame */
836 if (!skb->len) {
837 via_ircc_change_speed(self, speed);
838 dev->trans_start = jiffies;
839 dev_kfree_skb(skb);
840 return 0;
841 } else
842 self->new_speed = speed;
843 }
844 InitCard(iobase);
845 CommonInit(iobase);
846 SIRFilter(iobase, ON);
847 SetSIR(iobase, ON);
848 CRC16(iobase, ON);
849 EnTXCRC(iobase, 0);
850 WriteReg(iobase, I_ST_CT_0, 0x00);
851
852 spin_lock_irqsave(&self->lock, flags);
853 self->tx_buff.data = self->tx_buff.head;
854 self->tx_buff.len =
855 async_wrap_skb(skb, self->tx_buff.data,
856 self->tx_buff.truesize);
857
858 self->stats.tx_bytes += self->tx_buff.len;
859 /* Send this frame with old speed */
860 SetBaudRate(iobase, self->io.speed);
861 SetPulseWidth(iobase, 12);
862 SetSendPreambleCount(iobase, 0);
863 WriteReg(iobase, I_ST_CT_0, 0x80);
864
865 EnableTX(iobase, ON);
866 EnableRX(iobase, OFF);
867
868 ResetChip(iobase, 0);
869 ResetChip(iobase, 1);
870 ResetChip(iobase, 2);
871 ResetChip(iobase, 3);
872 ResetChip(iobase, 4);
873
874 EnAllInt(iobase, ON);
875 EnTXDMA(iobase, ON);
876 EnRXDMA(iobase, OFF);
877
878 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
879 DMA_TX_MODE);
880
881 SetSendByte(iobase, self->tx_buff.len);
882 RXStart(iobase, OFF);
883 TXStart(iobase, ON);
884
885 dev->trans_start = jiffies;
886 spin_unlock_irqrestore(&self->lock, flags);
887 dev_kfree_skb(skb);
888 return 0;
889}
890
891static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
892 struct net_device *dev)
893{
894 struct via_ircc_cb *self;
895 u16 iobase;
896 __u32 speed;
897 unsigned long flags;
898
899 self = (struct via_ircc_cb *) dev->priv;
900 iobase = self->io.fir_base;
901
902 if (self->st_fifo.len)
903 return 0;
904 if (self->chip_id == 0x3076)
905 iodelay(1500);
906 else
907 udelay(1500);
908 netif_stop_queue(dev);
909 speed = irda_get_next_speed(skb);
910 if ((speed != self->io.speed) && (speed != -1)) {
911 if (!skb->len) {
912 via_ircc_change_speed(self, speed);
913 dev->trans_start = jiffies;
914 dev_kfree_skb(skb);
915 return 0;
916 } else
917 self->new_speed = speed;
918 }
919 spin_lock_irqsave(&self->lock, flags);
920 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
921 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
922
923 self->tx_fifo.tail += skb->len;
924 self->stats.tx_bytes += skb->len;
925 skb_copy_from_linear_data(skb,
926 self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
927 self->tx_fifo.len++;
928 self->tx_fifo.free++;
929//F01 if (self->tx_fifo.len == 1) {
930 via_ircc_dma_xmit(self, iobase);
931//F01 }
932//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
933 dev->trans_start = jiffies;
934 dev_kfree_skb(skb);
935 spin_unlock_irqrestore(&self->lock, flags);
936 return 0;
937
938}
939
940static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
941{
942 EnTXDMA(iobase, OFF);
943 self->io.direction = IO_XMIT;
944 EnPhys(iobase, ON);
945 EnableTX(iobase, ON);
946 EnableRX(iobase, OFF);
947 ResetChip(iobase, 0);
948 ResetChip(iobase, 1);
949 ResetChip(iobase, 2);
950 ResetChip(iobase, 3);
951 ResetChip(iobase, 4);
952 EnAllInt(iobase, ON);
953 EnTXDMA(iobase, ON);
954 EnRXDMA(iobase, OFF);
955 irda_setup_dma(self->io.dma,
956 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
957 self->tx_buff.head) + self->tx_buff_dma,
958 self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
959 IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
960 __FUNCTION__, self->tx_fifo.ptr,
961 self->tx_fifo.queue[self->tx_fifo.ptr].len,
962 self->tx_fifo.len);
963
964 SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
965 RXStart(iobase, OFF);
966 TXStart(iobase, ON);
967 return 0;
968
969}
970
971/*
972 * Function via_ircc_dma_xmit_complete (self)
973 *
974 * The transfer of a frame in finished. This function will only be called
975 * by the interrupt handler
976 *
977 */
978static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
979{
980 int iobase;
981 int ret = TRUE;
982 u8 Tx_status;
983
984 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
985
986 iobase = self->io.fir_base;
987 /* Disable DMA */
988// DisableDmaChannel(self->io.dma);
989 /* Check for underrrun! */
990 /* Clear bit, by writing 1 into it */
991 Tx_status = GetTXStatus(iobase);
992 if (Tx_status & 0x08) {
993 self->stats.tx_errors++;
994 self->stats.tx_fifo_errors++;
995 hwreset(self);
996// how to clear underrrun ?
997 } else {
998 self->stats.tx_packets++;
999 ResetChip(iobase, 3);
1000 ResetChip(iobase, 4);
1001 }
1002 /* Check if we need to change the speed */
1003 if (self->new_speed) {
1004 via_ircc_change_speed(self, self->new_speed);
1005 self->new_speed = 0;
1006 }
1007
1008 /* Finished with this frame, so prepare for next */
1009 if (IsFIROn(iobase)) {
1010 if (self->tx_fifo.len) {
1011 self->tx_fifo.len--;
1012 self->tx_fifo.ptr++;
1013 }
1014 }
1015 IRDA_DEBUG(1,
1016 "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
1017 __FUNCTION__,
1018 self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
1019/* F01_S
1020 // Any frames to be sent back-to-back?
1021 if (self->tx_fifo.len) {
1022 // Not finished yet!
1023 via_ircc_dma_xmit(self, iobase);
1024 ret = FALSE;
1025 } else {
1026F01_E*/
1027 // Reset Tx FIFO info
1028 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1029 self->tx_fifo.tail = self->tx_buff.head;
1030//F01 }
1031
1032 // Make sure we have room for more frames
1033//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
1034 // Not busy transmitting anymore
1035 // Tell the network layer, that we can accept more frames
1036 netif_wake_queue(self->netdev);
1037//F01 }
1038 return ret;
1039}
1040
1041/*
1042 * Function via_ircc_dma_receive (self)
1043 *
1044 * Set configuration for receive a frame.
1045 *
1046 */
1047static int via_ircc_dma_receive(struct via_ircc_cb *self)
1048{
1049 int iobase;
1050
1051 iobase = self->io.fir_base;
1052
1053 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1054
1055 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1056 self->tx_fifo.tail = self->tx_buff.head;
1057 self->RxDataReady = 0;
1058 self->io.direction = IO_RECV;
1059 self->rx_buff.data = self->rx_buff.head;
1060 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1061 self->st_fifo.tail = self->st_fifo.head = 0;
1062
1063 EnPhys(iobase, ON);
1064 EnableTX(iobase, OFF);
1065 EnableRX(iobase, ON);
1066
1067 ResetChip(iobase, 0);
1068 ResetChip(iobase, 1);
1069 ResetChip(iobase, 2);
1070 ResetChip(iobase, 3);
1071 ResetChip(iobase, 4);
1072
1073 EnAllInt(iobase, ON);
1074 EnTXDMA(iobase, OFF);
1075 EnRXDMA(iobase, ON);
1076 irda_setup_dma(self->io.dma2, self->rx_buff_dma,
1077 self->rx_buff.truesize, DMA_RX_MODE);
1078 TXStart(iobase, OFF);
1079 RXStart(iobase, ON);
1080
1081 return 0;
1082}
1083
1084/*
1085 * Function via_ircc_dma_receive_complete (self)
1086 *
1087 * Controller Finished with receiving frames,
1088 * and this routine is call by ISR
1089 *
1090 */
1091static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
1092 int iobase)
1093{
1094 struct st_fifo *st_fifo;
1095 struct sk_buff *skb;
1096 int len, i;
1097 u8 status = 0;
1098
1099 iobase = self->io.fir_base;
1100 st_fifo = &self->st_fifo;
1101
1102 if (self->io.speed < 4000000) { //Speed below FIR
1103 len = GetRecvByte(iobase, self);
1104 skb = dev_alloc_skb(len + 1);
1105 if (skb == NULL)
1106 return FALSE;
1107 // Make sure IP header gets aligned
1108 skb_reserve(skb, 1);
1109 skb_put(skb, len - 2);
1110 if (self->chip_id == 0x3076) {
1111 for (i = 0; i < len - 2; i++)
1112 skb->data[i] = self->rx_buff.data[i * 2];
1113 } else {
1114 if (self->chip_id == 0x3096) {
1115 for (i = 0; i < len - 2; i++)
1116 skb->data[i] =
1117 self->rx_buff.data[i];
1118 }
1119 }
1120 // Move to next frame
1121 self->rx_buff.data += len;
1122 self->stats.rx_bytes += len;
1123 self->stats.rx_packets++;
1124 skb->dev = self->netdev;
1125 skb_reset_mac_header(skb);
1126 skb->protocol = htons(ETH_P_IRDA);
1127 netif_rx(skb);
1128 return TRUE;
1129 }
1130
1131 else { //FIR mode
1132 len = GetRecvByte(iobase, self);
1133 if (len == 0)
1134 return TRUE; //interrupt only, data maybe move by RxT
1135 if (((len - 4) < 2) || ((len - 4) > 2048)) {
1136 IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
1137 __FUNCTION__, len, RxCurCount(iobase, self),
1138 self->RxLastCount);
1139 hwreset(self);
1140 return FALSE;
1141 }
1142 IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
1143 __FUNCTION__,
1144 st_fifo->len, len - 4, RxCurCount(iobase, self));
1145
1146 st_fifo->entries[st_fifo->tail].status = status;
1147 st_fifo->entries[st_fifo->tail].len = len;
1148 st_fifo->pending_bytes += len;
1149 st_fifo->tail++;
1150 st_fifo->len++;
1151 if (st_fifo->tail > MAX_RX_WINDOW)
1152 st_fifo->tail = 0;
1153 self->RxDataReady = 0;
1154
1155 // It maybe have MAX_RX_WINDOW package receive by
1156 // receive_complete before Timer IRQ
1157/* F01_S
1158 if (st_fifo->len < (MAX_RX_WINDOW+2 )) {
1159 RXStart(iobase,ON);
1160 SetTimer(iobase,4);
1161 }
1162 else {
1163F01_E */
1164 EnableRX(iobase, OFF);
1165 EnRXDMA(iobase, OFF);
1166 RXStart(iobase, OFF);
1167//F01_S
1168 // Put this entry back in fifo
1169 if (st_fifo->head > MAX_RX_WINDOW)
1170 st_fifo->head = 0;
1171 status = st_fifo->entries[st_fifo->head].status;
1172 len = st_fifo->entries[st_fifo->head].len;
1173 st_fifo->head++;
1174 st_fifo->len--;
1175
1176 skb = dev_alloc_skb(len + 1 - 4);
1177 /*
1178 * if frame size,data ptr,or skb ptr are wrong ,the get next
1179 * entry.
1180 */
1181 if ((skb == NULL) || (skb->data == NULL)
1182 || (self->rx_buff.data == NULL) || (len < 6)) {
1183 self->stats.rx_dropped++;
1184 return TRUE;
1185 }
1186 skb_reserve(skb, 1);
1187 skb_put(skb, len - 4);
1188
1189 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
1190 IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __FUNCTION__,
1191 len - 4, self->rx_buff.data);
1192
1193 // Move to next frame
1194 self->rx_buff.data += len;
1195 self->stats.rx_bytes += len;
1196 self->stats.rx_packets++;
1197 skb->dev = self->netdev;
1198 skb_reset_mac_header(skb);
1199 skb->protocol = htons(ETH_P_IRDA);
1200 netif_rx(skb);
1201
1202//F01_E
1203 } //FIR
1204 return TRUE;
1205
1206}
1207
1208/*
1209 * if frame is received , but no INT ,then use this routine to upload frame.
1210 */
1211static int upload_rxdata(struct via_ircc_cb *self, int iobase)
1212{
1213 struct sk_buff *skb;
1214 int len;
1215 struct st_fifo *st_fifo;
1216 st_fifo = &self->st_fifo;
1217
1218 len = GetRecvByte(iobase, self);
1219
1220 IRDA_DEBUG(2, "%s(): len=%x\n", __FUNCTION__, len);
1221
1222 if ((len - 4) < 2) {
1223 self->stats.rx_dropped++;
1224 return FALSE;
1225 }
1226
1227 skb = dev_alloc_skb(len + 1);
1228 if (skb == NULL) {
1229 self->stats.rx_dropped++;
1230 return FALSE;
1231 }
1232 skb_reserve(skb, 1);
1233 skb_put(skb, len - 4 + 1);
1234 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
1235 st_fifo->tail++;
1236 st_fifo->len++;
1237 if (st_fifo->tail > MAX_RX_WINDOW)
1238 st_fifo->tail = 0;
1239 // Move to next frame
1240 self->rx_buff.data += len;
1241 self->stats.rx_bytes += len;
1242 self->stats.rx_packets++;
1243 skb->dev = self->netdev;
1244 skb_reset_mac_header(skb);
1245 skb->protocol = htons(ETH_P_IRDA);
1246 netif_rx(skb);
1247 if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
1248 RXStart(iobase, ON);
1249 } else {
1250 EnableRX(iobase, OFF);
1251 EnRXDMA(iobase, OFF);
1252 RXStart(iobase, OFF);
1253 }
1254 return TRUE;
1255}
1256
1257/*
1258 * Implement back to back receive , use this routine to upload data.
1259 */
1260
1261static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
1262{
1263 struct st_fifo *st_fifo;
1264 struct sk_buff *skb;
1265 int len;
1266 u8 status;
1267
1268 st_fifo = &self->st_fifo;
1269
1270 if (CkRxRecv(iobase, self)) {
1271 // if still receiving ,then return ,don't upload frame
1272 self->RetryCount = 0;
1273 SetTimer(iobase, 20);
1274 self->RxDataReady++;
1275 return FALSE;
1276 } else
1277 self->RetryCount++;
1278
1279 if ((self->RetryCount >= 1) ||
1280 ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize)
1281 || (st_fifo->len >= (MAX_RX_WINDOW))) {
1282 while (st_fifo->len > 0) { //upload frame
1283 // Put this entry back in fifo
1284 if (st_fifo->head > MAX_RX_WINDOW)
1285 st_fifo->head = 0;
1286 status = st_fifo->entries[st_fifo->head].status;
1287 len = st_fifo->entries[st_fifo->head].len;
1288 st_fifo->head++;
1289 st_fifo->len--;
1290
1291 skb = dev_alloc_skb(len + 1 - 4);
1292 /*
1293 * if frame size, data ptr, or skb ptr are wrong,
1294 * then get next entry.
1295 */
1296 if ((skb == NULL) || (skb->data == NULL)
1297 || (self->rx_buff.data == NULL) || (len < 6)) {
1298 self->stats.rx_dropped++;
1299 continue;
1300 }
1301 skb_reserve(skb, 1);
1302 skb_put(skb, len - 4);
1303 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
1304
1305 IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __FUNCTION__,
1306 len - 4, st_fifo->head);
1307
1308 // Move to next frame
1309 self->rx_buff.data += len;
1310 self->stats.rx_bytes += len;
1311 self->stats.rx_packets++;
1312 skb->dev = self->netdev;
1313 skb_reset_mac_header(skb);
1314 skb->protocol = htons(ETH_P_IRDA);
1315 netif_rx(skb);
1316 } //while
1317 self->RetryCount = 0;
1318
1319 IRDA_DEBUG(2,
1320 "%s(): End of upload HostStatus=%x,RxStatus=%x\n",
1321 __FUNCTION__,
1322 GetHostStatus(iobase), GetRXStatus(iobase));
1323
1324 /*
1325 * if frame is receive complete at this routine ,then upload
1326 * frame.
1327 */
1328 if ((GetRXStatus(iobase) & 0x10)
1329 && (RxCurCount(iobase, self) != self->RxLastCount)) {
1330 upload_rxdata(self, iobase);
1331 if (irda_device_txqueue_empty(self->netdev))
1332 via_ircc_dma_receive(self);
1333 }
1334 } // timer detect complete
1335 else
1336 SetTimer(iobase, 4);
1337 return TRUE;
1338
1339}
1340
1341
1342
1343/*
1344 * Function via_ircc_interrupt (irq, dev_id)
1345 *
1346 * An interrupt from the chip has arrived. Time to do some work
1347 *
1348 */
1349static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id)
1350{
1351 struct net_device *dev = dev_id;
1352 struct via_ircc_cb *self = dev->priv;
1353 int iobase;
1354 u8 iHostIntType, iRxIntType, iTxIntType;
1355
1356 iobase = self->io.fir_base;
1357 spin_lock(&self->lock);
1358 iHostIntType = GetHostStatus(iobase);
1359
1360 IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n",
1361 __FUNCTION__, iHostIntType,
1362 (iHostIntType & 0x40) ? "Timer" : "",
1363 (iHostIntType & 0x20) ? "Tx" : "",
1364 (iHostIntType & 0x10) ? "Rx" : "",
1365 (iHostIntType & 0x0e) >> 1);
1366
1367 if ((iHostIntType & 0x40) != 0) { //Timer Event
1368 self->EventFlag.TimeOut++;
1369 ClearTimerInt(iobase, 1);
1370 if (self->io.direction == IO_XMIT) {
1371 via_ircc_dma_xmit(self, iobase);
1372 }
1373 if (self->io.direction == IO_RECV) {
1374 /*
1375 * frame ready hold too long, must reset.
1376 */
1377 if (self->RxDataReady > 30) {
1378 hwreset(self);
1379 if (irda_device_txqueue_empty(self->netdev)) {
1380 via_ircc_dma_receive(self);
1381 }
1382 } else { // call this to upload frame.
1383 RxTimerHandler(self, iobase);
1384 }
1385 } //RECV
1386 } //Timer Event
1387 if ((iHostIntType & 0x20) != 0) { //Tx Event
1388 iTxIntType = GetTXStatus(iobase);
1389
1390 IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n",
1391 __FUNCTION__, iTxIntType,
1392 (iTxIntType & 0x08) ? "FIFO underr." : "",
1393 (iTxIntType & 0x04) ? "EOM" : "",
1394 (iTxIntType & 0x02) ? "FIFO ready" : "",
1395 (iTxIntType & 0x01) ? "Early EOM" : "");
1396
1397 if (iTxIntType & 0x4) {
1398 self->EventFlag.EOMessage++; // read and will auto clean
1399 if (via_ircc_dma_xmit_complete(self)) {
1400 if (irda_device_txqueue_empty
1401 (self->netdev)) {
1402 via_ircc_dma_receive(self);
1403 }
1404 } else {
1405 self->EventFlag.Unknown++;
1406 }
1407 } //EOP
1408 } //Tx Event
1409 //----------------------------------------
1410 if ((iHostIntType & 0x10) != 0) { //Rx Event
1411 /* Check if DMA has finished */
1412 iRxIntType = GetRXStatus(iobase);
1413
1414 IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n",
1415 __FUNCTION__, iRxIntType,
1416 (iRxIntType & 0x80) ? "PHY err." : "",
1417 (iRxIntType & 0x40) ? "CRC err" : "",
1418 (iRxIntType & 0x20) ? "FIFO overr." : "",
1419 (iRxIntType & 0x10) ? "EOF" : "",
1420 (iRxIntType & 0x08) ? "RxData" : "",
1421 (iRxIntType & 0x02) ? "RxMaxLen" : "",
1422 (iRxIntType & 0x01) ? "SIR bad" : "");
1423 if (!iRxIntType)
1424 IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __FUNCTION__);
1425
1426 if (iRxIntType & 0x10) {
1427 if (via_ircc_dma_receive_complete(self, iobase)) {
1428//F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self);
1429 via_ircc_dma_receive(self);
1430 }
1431 } // No ERR
1432 else { //ERR
1433 IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
1434 __FUNCTION__, iRxIntType, iHostIntType,
1435 RxCurCount(iobase, self),
1436 self->RxLastCount);
1437
1438 if (iRxIntType & 0x20) { //FIFO OverRun ERR
1439 ResetChip(iobase, 0);
1440 ResetChip(iobase, 1);
1441 } else { //PHY,CRC ERR
1442
1443 if (iRxIntType != 0x08)
1444 hwreset(self); //F01
1445 }
1446 via_ircc_dma_receive(self);
1447 } //ERR
1448
1449 } //Rx Event
1450 spin_unlock(&self->lock);
1451 return IRQ_RETVAL(iHostIntType);
1452}
1453
1454static void hwreset(struct via_ircc_cb *self)
1455{
1456 int iobase;
1457 iobase = self->io.fir_base;
1458
1459 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1460
1461 ResetChip(iobase, 5);
1462 EnableDMA(iobase, OFF);
1463 EnableTX(iobase, OFF);
1464 EnableRX(iobase, OFF);
1465 EnRXDMA(iobase, OFF);
1466 EnTXDMA(iobase, OFF);
1467 RXStart(iobase, OFF);
1468 TXStart(iobase, OFF);
1469 InitCard(iobase);
1470 CommonInit(iobase);
1471 SIRFilter(iobase, ON);
1472 SetSIR(iobase, ON);
1473 CRC16(iobase, ON);
1474 EnTXCRC(iobase, 0);
1475 WriteReg(iobase, I_ST_CT_0, 0x00);
1476 SetBaudRate(iobase, 9600);
1477 SetPulseWidth(iobase, 12);
1478 SetSendPreambleCount(iobase, 0);
1479 WriteReg(iobase, I_ST_CT_0, 0x80);
1480
1481 /* Restore speed. */
1482 via_ircc_change_speed(self, self->io.speed);
1483
1484 self->st_fifo.len = 0;
1485}
1486
1487/*
1488 * Function via_ircc_is_receiving (self)
1489 *
1490 * Return TRUE is we are currently receiving a frame
1491 *
1492 */
1493static int via_ircc_is_receiving(struct via_ircc_cb *self)
1494{
1495 int status = FALSE;
1496 int iobase;
1497
1498 IRDA_ASSERT(self != NULL, return FALSE;);
1499
1500 iobase = self->io.fir_base;
1501 if (CkRxRecv(iobase, self))
1502 status = TRUE;
1503
1504 IRDA_DEBUG(2, "%s(): status=%x....\n", __FUNCTION__, status);
1505
1506 return status;
1507}
1508
1509
1510/*
1511 * Function via_ircc_net_open (dev)
1512 *
1513 * Start the device
1514 *
1515 */
1516static int via_ircc_net_open(struct net_device *dev)
1517{
1518 struct via_ircc_cb *self;
1519 int iobase;
1520 char hwname[32];
1521
1522 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1523
1524 IRDA_ASSERT(dev != NULL, return -1;);
1525 self = (struct via_ircc_cb *) dev->priv;
1526 self->stats.rx_packets = 0;
1527 IRDA_ASSERT(self != NULL, return 0;);
1528 iobase = self->io.fir_base;
1529 if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
1530 IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
1531 self->io.irq);
1532 return -EAGAIN;
1533 }
1534 /*
1535 * Always allocate the DMA channel after the IRQ, and clean up on
1536 * failure.
1537 */
1538 if (request_dma(self->io.dma, dev->name)) {
1539 IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
1540 self->io.dma);
1541 free_irq(self->io.irq, self);
1542 return -EAGAIN;
1543 }
1544 if (self->io.dma2 != self->io.dma) {
1545 if (request_dma(self->io.dma2, dev->name)) {
1546 IRDA_WARNING("%s, unable to allocate dma2=%d\n",
1547 driver_name, self->io.dma2);
1548 free_irq(self->io.irq, self);
1549 return -EAGAIN;
1550 }
1551 }
1552
1553
1554 /* turn on interrupts */
1555 EnAllInt(iobase, ON);
1556 EnInternalLoop(iobase, OFF);
1557 EnExternalLoop(iobase, OFF);
1558
1559 /* */
1560 via_ircc_dma_receive(self);
1561
1562 /* Ready to play! */
1563 netif_start_queue(dev);
1564
1565 /*
1566 * Open new IrLAP layer instance, now that everything should be
1567 * initialized properly
1568 */
1569 sprintf(hwname, "VIA @ 0x%x", iobase);
1570 self->irlap = irlap_open(dev, &self->qos, hwname);
1571
1572 self->RxLastCount = 0;
1573
1574 return 0;
1575}
1576
1577/*
1578 * Function via_ircc_net_close (dev)
1579 *
1580 * Stop the device
1581 *
1582 */
1583static int via_ircc_net_close(struct net_device *dev)
1584{
1585 struct via_ircc_cb *self;
1586 int iobase;
1587
1588 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1589
1590 IRDA_ASSERT(dev != NULL, return -1;);
1591 self = (struct via_ircc_cb *) dev->priv;
1592 IRDA_ASSERT(self != NULL, return 0;);
1593
1594 /* Stop device */
1595 netif_stop_queue(dev);
1596 /* Stop and remove instance of IrLAP */
1597 if (self->irlap)
1598 irlap_close(self->irlap);
1599 self->irlap = NULL;
1600 iobase = self->io.fir_base;
1601 EnTXDMA(iobase, OFF);
1602 EnRXDMA(iobase, OFF);
1603 DisableDmaChannel(self->io.dma);
1604
1605 /* Disable interrupts */
1606 EnAllInt(iobase, OFF);
1607 free_irq(self->io.irq, dev);
1608 free_dma(self->io.dma);
1609
1610 return 0;
1611}
1612
1613/*
1614 * Function via_ircc_net_ioctl (dev, rq, cmd)
1615 *
1616 * Process IOCTL commands for this device
1617 *
1618 */
1619static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
1620 int cmd)
1621{
1622 struct if_irda_req *irq = (struct if_irda_req *) rq;
1623 struct via_ircc_cb *self;
1624 unsigned long flags;
1625 int ret = 0;
1626
1627 IRDA_ASSERT(dev != NULL, return -1;);
1628 self = dev->priv;
1629 IRDA_ASSERT(self != NULL, return -1;);
1630 IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name,
1631 cmd);
1632 /* Disable interrupts & save flags */
1633 spin_lock_irqsave(&self->lock, flags);
1634 switch (cmd) {
1635 case SIOCSBANDWIDTH: /* Set bandwidth */
1636 if (!capable(CAP_NET_ADMIN)) {
1637 ret = -EPERM;
1638 goto out;
1639 }
1640 via_ircc_change_speed(self, irq->ifr_baudrate);
1641 break;
1642 case SIOCSMEDIABUSY: /* Set media busy */
1643 if (!capable(CAP_NET_ADMIN)) {
1644 ret = -EPERM;
1645 goto out;
1646 }
1647 irda_device_set_media_busy(self->netdev, TRUE);
1648 break;
1649 case SIOCGRECEIVING: /* Check if we are receiving right now */
1650 irq->ifr_receiving = via_ircc_is_receiving(self);
1651 break;
1652 default:
1653 ret = -EOPNOTSUPP;
1654 }
1655 out:
1656 spin_unlock_irqrestore(&self->lock, flags);
1657 return ret;
1658}
1659
1660static struct net_device_stats *via_ircc_net_get_stats(struct net_device
1661 *dev)
1662{
1663 struct via_ircc_cb *self = (struct via_ircc_cb *) dev->priv;
1664
1665 return &self->stats;
1666}
1667
1668MODULE_AUTHOR("VIA Technologies,inc");
1669MODULE_DESCRIPTION("VIA IrDA Device Driver");
1670MODULE_LICENSE("GPL");
1671
1672module_init(via_ircc_init);
1673module_exit(via_ircc_cleanup);