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[mirror_ubuntu-zesty-kernel.git] / drivers / net / irda / via-ircc.c
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
8 Copyright (c) 1998-2003 VIA Technologies, Inc.
9
10 This program is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free Software
12 Foundation; either version 2, or (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17 See the GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along with
20 this program; if not, write to the Free Software Foundation, Inc.,
21 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22
23 F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
24 F02 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
30 2004-02-16: <sda@bdit.de>
31 - Removed unneeded 'legacy' pci stuff.
32 - Make sure SIR mode is set (hw_init()) before calling mode-dependent 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/init.h>
49 #include <linux/rtnetlink.h>
50 #include <linux/pci.h>
51 #include <linux/dma-mapping.h>
52 #include <linux/gfp.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
69 static char *driver_name = VIA_MODULE_NAME;
70
71 /* Module parameters */
72 static int qos_mtt_bits = 0x07; /* 1 ms or more */
73 static int dongle_id = 0; /* default: probe */
74
75 /* We can't guess the type of connected dongle, user *must* supply it. */
76 module_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 */
82 static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
83
84 /* Some prototypes */
85 static int via_ircc_open(int i, chipio_t * info, unsigned int id);
86 static int via_ircc_close(struct via_ircc_cb *self);
87 static int via_ircc_dma_receive(struct via_ircc_cb *self);
88 static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
89 int iobase);
90 static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
91 struct net_device *dev);
92 static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
93 struct net_device *dev);
94 static void via_hw_init(struct via_ircc_cb *self);
95 static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
96 static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
97 static int via_ircc_is_receiving(struct via_ircc_cb *self);
98 static int via_ircc_read_dongle_id(int iobase);
99
100 static int via_ircc_net_open(struct net_device *dev);
101 static int via_ircc_net_close(struct net_device *dev);
102 static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
103 int cmd);
104 static void via_ircc_change_dongle_speed(int iobase, int speed,
105 int dongle_id);
106 static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
107 static void hwreset(struct via_ircc_cb *self);
108 static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
109 static int upload_rxdata(struct via_ircc_cb *self, int iobase);
110 static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id);
111 static void __devexit via_remove_one (struct pci_dev *pdev);
112
113 /* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
114 static void iodelay(int udelay)
115 {
116 u8 data;
117 int i;
118
119 for (i = 0; i < udelay; i++) {
120 data = inb(0x80);
121 }
122 }
123
124 static DEFINE_PCI_DEVICE_TABLE(via_pci_tbl) = {
125 { PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
126 { PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
127 { PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
128 { PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
129 { PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
130 { 0, }
131 };
132
133 MODULE_DEVICE_TABLE(pci,via_pci_tbl);
134
135
136 static struct pci_driver via_driver = {
137 .name = VIA_MODULE_NAME,
138 .id_table = via_pci_tbl,
139 .probe = via_init_one,
140 .remove = __devexit_p(via_remove_one),
141 };
142
143
144 /*
145 * Function via_ircc_init ()
146 *
147 * Initialize chip. Just find out chip type and resource.
148 */
149 static int __init via_ircc_init(void)
150 {
151 int rc;
152
153 IRDA_DEBUG(3, "%s()\n", __func__);
154
155 rc = pci_register_driver(&via_driver);
156 if (rc < 0) {
157 IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n",
158 __func__, rc);
159 return -ENODEV;
160 }
161 return 0;
162 }
163
164 static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id)
165 {
166 int rc;
167 u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
168 u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
169 chipio_t info;
170
171 IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __func__, id->device);
172
173 rc = pci_enable_device (pcidev);
174 if (rc) {
175 IRDA_DEBUG(0, "%s(): error rc = %d\n", __func__, rc);
176 return -ENODEV;
177 }
178
179 // South Bridge exist
180 if ( ReadLPCReg(0x20) != 0x3C )
181 Chipset=0x3096;
182 else
183 Chipset=0x3076;
184
185 if (Chipset==0x3076) {
186 IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __func__);
187
188 WriteLPCReg(7,0x0c );
189 temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
190 if((temp&0x01)==1) { // BIOS close or no FIR
191 WriteLPCReg(0x1d, 0x82 );
192 WriteLPCReg(0x23,0x18);
193 temp=ReadLPCReg(0xF0);
194 if((temp&0x01)==0) {
195 temp=(ReadLPCReg(0x74)&0x03); //DMA
196 FirDRQ0=temp + 4;
197 temp=(ReadLPCReg(0x74)&0x0C) >> 2;
198 FirDRQ1=temp + 4;
199 } else {
200 temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA
201 FirDRQ0=temp + 4;
202 FirDRQ1=FirDRQ0;
203 }
204 FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ
205 FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte
206 FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte
207 FirIOBase=FirIOBase ;
208 info.fir_base=FirIOBase;
209 info.irq=FirIRQ;
210 info.dma=FirDRQ1;
211 info.dma2=FirDRQ0;
212 pci_read_config_byte(pcidev,0x40,&bTmp);
213 pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
214 pci_read_config_byte(pcidev,0x42,&bTmp);
215 pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
216 pci_write_config_byte(pcidev,0x5a,0xc0);
217 WriteLPCReg(0x28, 0x70 );
218 if (via_ircc_open(0, &info,0x3076) == 0)
219 rc=0;
220 } else
221 rc = -ENODEV; //IR not turn on
222 } else { //Not VT1211
223 IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __func__);
224
225 pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
226 if((bTmp&0x01)==1) { // BIOS enable FIR
227 //Enable Double DMA clock
228 pci_read_config_byte(pcidev,0x42,&oldPCI_40);
229 pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
230 pci_read_config_byte(pcidev,0x40,&oldPCI_40);
231 pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
232 pci_read_config_byte(pcidev,0x44,&oldPCI_44);
233 pci_write_config_byte(pcidev,0x44,0x4e);
234 //---------- read configuration from Function0 of south bridge
235 if((bTmp&0x02)==0) {
236 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
237 FirDRQ0 = (bTmp1 & 0x30) >> 4;
238 pci_read_config_byte(pcidev,0x44,&bTmp1);
239 FirDRQ1 = (bTmp1 & 0xc0) >> 6;
240 } else {
241 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
242 FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
243 FirDRQ1=0;
244 }
245 pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ
246 FirIRQ = bTmp1 & 0x0f;
247
248 pci_read_config_byte(pcidev,0x69,&bTmp);
249 FirIOBase = bTmp << 8;//hight byte
250 pci_read_config_byte(pcidev,0x68,&bTmp);
251 FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
252 //-------------------------
253 info.fir_base=FirIOBase;
254 info.irq=FirIRQ;
255 info.dma=FirDRQ1;
256 info.dma2=FirDRQ0;
257 if (via_ircc_open(0, &info,0x3096) == 0)
258 rc=0;
259 } else
260 rc = -ENODEV; //IR not turn on !!!!!
261 }//Not VT1211
262
263 IRDA_DEBUG(2, "%s(): End - rc = %d\n", __func__, rc);
264 return rc;
265 }
266
267 /*
268 * Function via_ircc_clean ()
269 *
270 * Close all configured chips
271 *
272 */
273 static void via_ircc_clean(void)
274 {
275 int i;
276
277 IRDA_DEBUG(3, "%s()\n", __func__);
278
279 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
280 if (dev_self[i])
281 via_ircc_close(dev_self[i]);
282 }
283 }
284
285 static void __devexit via_remove_one (struct pci_dev *pdev)
286 {
287 IRDA_DEBUG(3, "%s()\n", __func__);
288
289 /* FIXME : This is ugly. We should use pci_get_drvdata(pdev);
290 * to get our driver instance and call directly via_ircc_close().
291 * See vlsi_ir for details...
292 * Jean II */
293 via_ircc_clean();
294
295 /* FIXME : This should be in via_ircc_close(), because here we may
296 * theoritically disable still configured devices :-( - Jean II */
297 pci_disable_device(pdev);
298 }
299
300 static void __exit via_ircc_cleanup(void)
301 {
302 IRDA_DEBUG(3, "%s()\n", __func__);
303
304 /* FIXME : This should be redundant, as pci_unregister_driver()
305 * should call via_remove_one() on each device.
306 * Jean II */
307 via_ircc_clean();
308
309 /* Cleanup all instances of the driver */
310 pci_unregister_driver (&via_driver);
311 }
312
313 static const struct net_device_ops via_ircc_sir_ops = {
314 .ndo_start_xmit = via_ircc_hard_xmit_sir,
315 .ndo_open = via_ircc_net_open,
316 .ndo_stop = via_ircc_net_close,
317 .ndo_do_ioctl = via_ircc_net_ioctl,
318 };
319 static const struct net_device_ops via_ircc_fir_ops = {
320 .ndo_start_xmit = via_ircc_hard_xmit_fir,
321 .ndo_open = via_ircc_net_open,
322 .ndo_stop = via_ircc_net_close,
323 .ndo_do_ioctl = via_ircc_net_ioctl,
324 };
325
326 /*
327 * Function via_ircc_open (iobase, irq)
328 *
329 * Open driver instance
330 *
331 */
332 static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
333 {
334 struct net_device *dev;
335 struct via_ircc_cb *self;
336 int err;
337
338 IRDA_DEBUG(3, "%s()\n", __func__);
339
340 if (i >= ARRAY_SIZE(dev_self))
341 return -ENOMEM;
342
343 /* Allocate new instance of the driver */
344 dev = alloc_irdadev(sizeof(struct via_ircc_cb));
345 if (dev == NULL)
346 return -ENOMEM;
347
348 self = netdev_priv(dev);
349 self->netdev = dev;
350 spin_lock_init(&self->lock);
351
352 /* FIXME : We should store our driver instance in the PCI layer,
353 * using pci_set_drvdata(), not in this array.
354 * See vlsi_ir for details... - Jean II */
355 /* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */
356 /* Need to store self somewhere */
357 dev_self[i] = self;
358 self->index = i;
359 /* Initialize Resource */
360 self->io.cfg_base = info->cfg_base;
361 self->io.fir_base = info->fir_base;
362 self->io.irq = info->irq;
363 self->io.fir_ext = CHIP_IO_EXTENT;
364 self->io.dma = info->dma;
365 self->io.dma2 = info->dma2;
366 self->io.fifo_size = 32;
367 self->chip_id = id;
368 self->st_fifo.len = 0;
369 self->RxDataReady = 0;
370
371 /* Reserve the ioports that we need */
372 if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
373 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
374 __func__, self->io.fir_base);
375 err = -ENODEV;
376 goto err_out1;
377 }
378
379 /* Initialize QoS for this device */
380 irda_init_max_qos_capabilies(&self->qos);
381
382 /* Check if user has supplied the dongle id or not */
383 if (!dongle_id)
384 dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
385 self->io.dongle_id = dongle_id;
386
387 /* The only value we must override it the baudrate */
388 /* Maximum speeds and capabilities are dongle-dependent. */
389 switch( self->io.dongle_id ){
390 case 0x0d:
391 self->qos.baud_rate.bits =
392 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
393 IR_576000 | IR_1152000 | (IR_4000000 << 8);
394 break;
395 default:
396 self->qos.baud_rate.bits =
397 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
398 break;
399 }
400
401 /* Following was used for testing:
402 *
403 * self->qos.baud_rate.bits = IR_9600;
404 *
405 * Is is no good, as it prohibits (error-prone) speed-changes.
406 */
407
408 self->qos.min_turn_time.bits = qos_mtt_bits;
409 irda_qos_bits_to_value(&self->qos);
410
411 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
412 self->rx_buff.truesize = 14384 + 2048;
413 self->tx_buff.truesize = 14384 + 2048;
414
415 /* Allocate memory if needed */
416 self->rx_buff.head =
417 dma_alloc_coherent(NULL, self->rx_buff.truesize,
418 &self->rx_buff_dma, GFP_KERNEL);
419 if (self->rx_buff.head == NULL) {
420 err = -ENOMEM;
421 goto err_out2;
422 }
423 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
424
425 self->tx_buff.head =
426 dma_alloc_coherent(NULL, self->tx_buff.truesize,
427 &self->tx_buff_dma, GFP_KERNEL);
428 if (self->tx_buff.head == NULL) {
429 err = -ENOMEM;
430 goto err_out3;
431 }
432 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
433
434 self->rx_buff.in_frame = FALSE;
435 self->rx_buff.state = OUTSIDE_FRAME;
436 self->tx_buff.data = self->tx_buff.head;
437 self->rx_buff.data = self->rx_buff.head;
438
439 /* Reset Tx queue info */
440 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
441 self->tx_fifo.tail = self->tx_buff.head;
442
443 /* Override the network functions we need to use */
444 dev->netdev_ops = &via_ircc_sir_ops;
445
446 err = register_netdev(dev);
447 if (err)
448 goto err_out4;
449
450 IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);
451
452 /* Initialise the hardware..
453 */
454 self->io.speed = 9600;
455 via_hw_init(self);
456 return 0;
457 err_out4:
458 dma_free_coherent(NULL, self->tx_buff.truesize,
459 self->tx_buff.head, self->tx_buff_dma);
460 err_out3:
461 dma_free_coherent(NULL, self->rx_buff.truesize,
462 self->rx_buff.head, self->rx_buff_dma);
463 err_out2:
464 release_region(self->io.fir_base, self->io.fir_ext);
465 err_out1:
466 free_netdev(dev);
467 dev_self[i] = NULL;
468 return err;
469 }
470
471 /*
472 * Function via_ircc_close (self)
473 *
474 * Close driver instance
475 *
476 */
477 static int via_ircc_close(struct via_ircc_cb *self)
478 {
479 int iobase;
480
481 IRDA_DEBUG(3, "%s()\n", __func__);
482
483 IRDA_ASSERT(self != NULL, return -1;);
484
485 iobase = self->io.fir_base;
486
487 ResetChip(iobase, 5); //hardware reset.
488 /* Remove netdevice */
489 unregister_netdev(self->netdev);
490
491 /* Release the PORT that this driver is using */
492 IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
493 __func__, self->io.fir_base);
494 release_region(self->io.fir_base, self->io.fir_ext);
495 if (self->tx_buff.head)
496 dma_free_coherent(NULL, self->tx_buff.truesize,
497 self->tx_buff.head, self->tx_buff_dma);
498 if (self->rx_buff.head)
499 dma_free_coherent(NULL, self->rx_buff.truesize,
500 self->rx_buff.head, self->rx_buff_dma);
501 dev_self[self->index] = NULL;
502
503 free_netdev(self->netdev);
504
505 return 0;
506 }
507
508 /*
509 * Function via_hw_init(self)
510 *
511 * Returns non-negative on success.
512 *
513 * Formerly via_ircc_setup
514 */
515 static void via_hw_init(struct via_ircc_cb *self)
516 {
517 int iobase = self->io.fir_base;
518
519 IRDA_DEBUG(3, "%s()\n", __func__);
520
521 SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095
522 // FIFO Init
523 EnRXFIFOReadyInt(iobase, OFF);
524 EnRXFIFOHalfLevelInt(iobase, OFF);
525 EnTXFIFOHalfLevelInt(iobase, OFF);
526 EnTXFIFOUnderrunEOMInt(iobase, ON);
527 EnTXFIFOReadyInt(iobase, OFF);
528 InvertTX(iobase, OFF);
529 InvertRX(iobase, OFF);
530
531 if (ReadLPCReg(0x20) == 0x3c)
532 WriteLPCReg(0xF0, 0); // for VT1211
533 /* Int Init */
534 EnRXSpecInt(iobase, ON);
535
536 /* The following is basically hwreset */
537 /* If this is the case, why not just call hwreset() ? Jean II */
538 ResetChip(iobase, 5);
539 EnableDMA(iobase, OFF);
540 EnableTX(iobase, OFF);
541 EnableRX(iobase, OFF);
542 EnRXDMA(iobase, OFF);
543 EnTXDMA(iobase, OFF);
544 RXStart(iobase, OFF);
545 TXStart(iobase, OFF);
546 InitCard(iobase);
547 CommonInit(iobase);
548 SIRFilter(iobase, ON);
549 SetSIR(iobase, ON);
550 CRC16(iobase, ON);
551 EnTXCRC(iobase, 0);
552 WriteReg(iobase, I_ST_CT_0, 0x00);
553 SetBaudRate(iobase, 9600);
554 SetPulseWidth(iobase, 12);
555 SetSendPreambleCount(iobase, 0);
556
557 self->io.speed = 9600;
558 self->st_fifo.len = 0;
559
560 via_ircc_change_dongle_speed(iobase, self->io.speed,
561 self->io.dongle_id);
562
563 WriteReg(iobase, I_ST_CT_0, 0x80);
564 }
565
566 /*
567 * Function via_ircc_read_dongle_id (void)
568 *
569 */
570 static int via_ircc_read_dongle_id(int iobase)
571 {
572 int dongle_id = 9; /* Default to IBM */
573
574 IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
575 return dongle_id;
576 }
577
578 /*
579 * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
580 * Change speed of the attach dongle
581 * only implement two type of dongle currently.
582 */
583 static void via_ircc_change_dongle_speed(int iobase, int speed,
584 int dongle_id)
585 {
586 u8 mode = 0;
587
588 /* speed is unused, as we use IsSIROn()/IsMIROn() */
589 speed = speed;
590
591 IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
592 __func__, speed, iobase, dongle_id);
593
594 switch (dongle_id) {
595
596 /* Note: The dongle_id's listed here are derived from
597 * nsc-ircc.c */
598
599 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
600 UseOneRX(iobase, ON); // use one RX pin RX1,RX2
601 InvertTX(iobase, OFF);
602 InvertRX(iobase, OFF);
603
604 EnRX2(iobase, ON); //sir to rx2
605 EnGPIOtoRX2(iobase, OFF);
606
607 if (IsSIROn(iobase)) { //sir
608 // Mode select Off
609 SlowIRRXLowActive(iobase, ON);
610 udelay(1000);
611 SlowIRRXLowActive(iobase, OFF);
612 } else {
613 if (IsMIROn(iobase)) { //mir
614 // Mode select On
615 SlowIRRXLowActive(iobase, OFF);
616 udelay(20);
617 } else { // fir
618 if (IsFIROn(iobase)) { //fir
619 // Mode select On
620 SlowIRRXLowActive(iobase, OFF);
621 udelay(20);
622 }
623 }
624 }
625 break;
626
627 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
628 UseOneRX(iobase, ON); //use ONE RX....RX1
629 InvertTX(iobase, OFF);
630 InvertRX(iobase, OFF); // invert RX pin
631
632 EnRX2(iobase, ON);
633 EnGPIOtoRX2(iobase, OFF);
634 if (IsSIROn(iobase)) { //sir
635 // Mode select On
636 SlowIRRXLowActive(iobase, ON);
637 udelay(20);
638 // Mode select Off
639 SlowIRRXLowActive(iobase, OFF);
640 }
641 if (IsMIROn(iobase)) { //mir
642 // Mode select On
643 SlowIRRXLowActive(iobase, OFF);
644 udelay(20);
645 // Mode select Off
646 SlowIRRXLowActive(iobase, ON);
647 } else { // fir
648 if (IsFIROn(iobase)) { //fir
649 // Mode select On
650 SlowIRRXLowActive(iobase, OFF);
651 // TX On
652 WriteTX(iobase, ON);
653 udelay(20);
654 // Mode select OFF
655 SlowIRRXLowActive(iobase, ON);
656 udelay(20);
657 // TX Off
658 WriteTX(iobase, OFF);
659 }
660 }
661 break;
662
663 case 0x0d:
664 UseOneRX(iobase, OFF); // use two RX pin RX1,RX2
665 InvertTX(iobase, OFF);
666 InvertRX(iobase, OFF);
667 SlowIRRXLowActive(iobase, OFF);
668 if (IsSIROn(iobase)) { //sir
669 EnGPIOtoRX2(iobase, OFF);
670 WriteGIO(iobase, OFF);
671 EnRX2(iobase, OFF); //sir to rx2
672 } else { // fir mir
673 EnGPIOtoRX2(iobase, OFF);
674 WriteGIO(iobase, OFF);
675 EnRX2(iobase, OFF); //fir to rx
676 }
677 break;
678
679 case 0x11: /* Temic TFDS4500 */
680
681 IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __func__);
682
683 UseOneRX(iobase, ON); //use ONE RX....RX1
684 InvertTX(iobase, OFF);
685 InvertRX(iobase, ON); // invert RX pin
686
687 EnRX2(iobase, ON); //sir to rx2
688 EnGPIOtoRX2(iobase, OFF);
689
690 if( IsSIROn(iobase) ){ //sir
691
692 // Mode select On
693 SlowIRRXLowActive(iobase, ON);
694 udelay(20);
695 // Mode select Off
696 SlowIRRXLowActive(iobase, OFF);
697
698 } else{
699 IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __func__);
700 }
701 break;
702
703 case 0x0ff: /* Vishay */
704 if (IsSIROn(iobase))
705 mode = 0;
706 else if (IsMIROn(iobase))
707 mode = 1;
708 else if (IsFIROn(iobase))
709 mode = 2;
710 else if (IsVFIROn(iobase))
711 mode = 5; //VFIR-16
712 SI_SetMode(iobase, mode);
713 break;
714
715 default:
716 IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
717 __func__, dongle_id);
718 }
719 }
720
721 /*
722 * Function via_ircc_change_speed (self, baud)
723 *
724 * Change the speed of the device
725 *
726 */
727 static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
728 {
729 struct net_device *dev = self->netdev;
730 u16 iobase;
731 u8 value = 0, bTmp;
732
733 iobase = self->io.fir_base;
734 /* Update accounting for new speed */
735 self->io.speed = speed;
736 IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __func__, speed);
737
738 WriteReg(iobase, I_ST_CT_0, 0x0);
739
740 /* Controller mode sellection */
741 switch (speed) {
742 case 2400:
743 case 9600:
744 case 19200:
745 case 38400:
746 case 57600:
747 case 115200:
748 value = (115200/speed)-1;
749 SetSIR(iobase, ON);
750 CRC16(iobase, ON);
751 break;
752 case 576000:
753 /* FIXME: this can't be right, as it's the same as 115200,
754 * and 576000 is MIR, not SIR. */
755 value = 0;
756 SetSIR(iobase, ON);
757 CRC16(iobase, ON);
758 break;
759 case 1152000:
760 value = 0;
761 SetMIR(iobase, ON);
762 /* FIXME: CRC ??? */
763 break;
764 case 4000000:
765 value = 0;
766 SetFIR(iobase, ON);
767 SetPulseWidth(iobase, 0);
768 SetSendPreambleCount(iobase, 14);
769 CRC16(iobase, OFF);
770 EnTXCRC(iobase, ON);
771 break;
772 case 16000000:
773 value = 0;
774 SetVFIR(iobase, ON);
775 /* FIXME: CRC ??? */
776 break;
777 default:
778 value = 0;
779 break;
780 }
781
782 /* Set baudrate to 0x19[2..7] */
783 bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
784 bTmp |= value << 2;
785 WriteReg(iobase, I_CF_H_1, bTmp);
786
787 /* Some dongles may need to be informed about speed changes. */
788 via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
789
790 /* Set FIFO size to 64 */
791 SetFIFO(iobase, 64);
792
793 /* Enable IR */
794 WriteReg(iobase, I_ST_CT_0, 0x80);
795
796 // EnTXFIFOHalfLevelInt(iobase,ON);
797
798 /* Enable some interrupts so we can receive frames */
799 //EnAllInt(iobase,ON);
800
801 if (IsSIROn(iobase)) {
802 SIRFilter(iobase, ON);
803 SIRRecvAny(iobase, ON);
804 } else {
805 SIRFilter(iobase, OFF);
806 SIRRecvAny(iobase, OFF);
807 }
808
809 if (speed > 115200) {
810 /* Install FIR xmit handler */
811 dev->netdev_ops = &via_ircc_fir_ops;
812 via_ircc_dma_receive(self);
813 } else {
814 /* Install SIR xmit handler */
815 dev->netdev_ops = &via_ircc_sir_ops;
816 }
817 netif_wake_queue(dev);
818 }
819
820 /*
821 * Function via_ircc_hard_xmit (skb, dev)
822 *
823 * Transmit the frame!
824 *
825 */
826 static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
827 struct net_device *dev)
828 {
829 struct via_ircc_cb *self;
830 unsigned long flags;
831 u16 iobase;
832 __u32 speed;
833
834 self = netdev_priv(dev);
835 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
836 iobase = self->io.fir_base;
837
838 netif_stop_queue(dev);
839 /* Check if we need to change the speed */
840 speed = irda_get_next_speed(skb);
841 if ((speed != self->io.speed) && (speed != -1)) {
842 /* Check for empty frame */
843 if (!skb->len) {
844 via_ircc_change_speed(self, speed);
845 dev->trans_start = jiffies;
846 dev_kfree_skb(skb);
847 return NETDEV_TX_OK;
848 } else
849 self->new_speed = speed;
850 }
851 InitCard(iobase);
852 CommonInit(iobase);
853 SIRFilter(iobase, ON);
854 SetSIR(iobase, ON);
855 CRC16(iobase, ON);
856 EnTXCRC(iobase, 0);
857 WriteReg(iobase, I_ST_CT_0, 0x00);
858
859 spin_lock_irqsave(&self->lock, flags);
860 self->tx_buff.data = self->tx_buff.head;
861 self->tx_buff.len =
862 async_wrap_skb(skb, self->tx_buff.data,
863 self->tx_buff.truesize);
864
865 dev->stats.tx_bytes += self->tx_buff.len;
866 /* Send this frame with old speed */
867 SetBaudRate(iobase, self->io.speed);
868 SetPulseWidth(iobase, 12);
869 SetSendPreambleCount(iobase, 0);
870 WriteReg(iobase, I_ST_CT_0, 0x80);
871
872 EnableTX(iobase, ON);
873 EnableRX(iobase, OFF);
874
875 ResetChip(iobase, 0);
876 ResetChip(iobase, 1);
877 ResetChip(iobase, 2);
878 ResetChip(iobase, 3);
879 ResetChip(iobase, 4);
880
881 EnAllInt(iobase, ON);
882 EnTXDMA(iobase, ON);
883 EnRXDMA(iobase, OFF);
884
885 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
886 DMA_TX_MODE);
887
888 SetSendByte(iobase, self->tx_buff.len);
889 RXStart(iobase, OFF);
890 TXStart(iobase, ON);
891
892 dev->trans_start = jiffies;
893 spin_unlock_irqrestore(&self->lock, flags);
894 dev_kfree_skb(skb);
895 return NETDEV_TX_OK;
896 }
897
898 static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
899 struct net_device *dev)
900 {
901 struct via_ircc_cb *self;
902 u16 iobase;
903 __u32 speed;
904 unsigned long flags;
905
906 self = netdev_priv(dev);
907 iobase = self->io.fir_base;
908
909 if (self->st_fifo.len)
910 return NETDEV_TX_OK;
911 if (self->chip_id == 0x3076)
912 iodelay(1500);
913 else
914 udelay(1500);
915 netif_stop_queue(dev);
916 speed = irda_get_next_speed(skb);
917 if ((speed != self->io.speed) && (speed != -1)) {
918 if (!skb->len) {
919 via_ircc_change_speed(self, speed);
920 dev->trans_start = jiffies;
921 dev_kfree_skb(skb);
922 return NETDEV_TX_OK;
923 } else
924 self->new_speed = speed;
925 }
926 spin_lock_irqsave(&self->lock, flags);
927 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
928 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
929
930 self->tx_fifo.tail += skb->len;
931 dev->stats.tx_bytes += skb->len;
932 skb_copy_from_linear_data(skb,
933 self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
934 self->tx_fifo.len++;
935 self->tx_fifo.free++;
936 //F01 if (self->tx_fifo.len == 1) {
937 via_ircc_dma_xmit(self, iobase);
938 //F01 }
939 //F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
940 dev->trans_start = jiffies;
941 dev_kfree_skb(skb);
942 spin_unlock_irqrestore(&self->lock, flags);
943 return NETDEV_TX_OK;
944
945 }
946
947 static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
948 {
949 EnTXDMA(iobase, OFF);
950 self->io.direction = IO_XMIT;
951 EnPhys(iobase, ON);
952 EnableTX(iobase, ON);
953 EnableRX(iobase, OFF);
954 ResetChip(iobase, 0);
955 ResetChip(iobase, 1);
956 ResetChip(iobase, 2);
957 ResetChip(iobase, 3);
958 ResetChip(iobase, 4);
959 EnAllInt(iobase, ON);
960 EnTXDMA(iobase, ON);
961 EnRXDMA(iobase, OFF);
962 irda_setup_dma(self->io.dma,
963 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
964 self->tx_buff.head) + self->tx_buff_dma,
965 self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
966 IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
967 __func__, self->tx_fifo.ptr,
968 self->tx_fifo.queue[self->tx_fifo.ptr].len,
969 self->tx_fifo.len);
970
971 SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
972 RXStart(iobase, OFF);
973 TXStart(iobase, ON);
974 return 0;
975
976 }
977
978 /*
979 * Function via_ircc_dma_xmit_complete (self)
980 *
981 * The transfer of a frame in finished. This function will only be called
982 * by the interrupt handler
983 *
984 */
985 static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
986 {
987 int iobase;
988 int ret = TRUE;
989 u8 Tx_status;
990
991 IRDA_DEBUG(3, "%s()\n", __func__);
992
993 iobase = self->io.fir_base;
994 /* Disable DMA */
995 // DisableDmaChannel(self->io.dma);
996 /* Check for underrrun! */
997 /* Clear bit, by writing 1 into it */
998 Tx_status = GetTXStatus(iobase);
999 if (Tx_status & 0x08) {
1000 self->netdev->stats.tx_errors++;
1001 self->netdev->stats.tx_fifo_errors++;
1002 hwreset(self);
1003 // how to clear underrrun ?
1004 } else {
1005 self->netdev->stats.tx_packets++;
1006 ResetChip(iobase, 3);
1007 ResetChip(iobase, 4);
1008 }
1009 /* Check if we need to change the speed */
1010 if (self->new_speed) {
1011 via_ircc_change_speed(self, self->new_speed);
1012 self->new_speed = 0;
1013 }
1014
1015 /* Finished with this frame, so prepare for next */
1016 if (IsFIROn(iobase)) {
1017 if (self->tx_fifo.len) {
1018 self->tx_fifo.len--;
1019 self->tx_fifo.ptr++;
1020 }
1021 }
1022 IRDA_DEBUG(1,
1023 "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
1024 __func__,
1025 self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
1026 /* F01_S
1027 // Any frames to be sent back-to-back?
1028 if (self->tx_fifo.len) {
1029 // Not finished yet!
1030 via_ircc_dma_xmit(self, iobase);
1031 ret = FALSE;
1032 } else {
1033 F01_E*/
1034 // Reset Tx FIFO info
1035 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1036 self->tx_fifo.tail = self->tx_buff.head;
1037 //F01 }
1038
1039 // Make sure we have room for more frames
1040 //F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
1041 // Not busy transmitting anymore
1042 // Tell the network layer, that we can accept more frames
1043 netif_wake_queue(self->netdev);
1044 //F01 }
1045 return ret;
1046 }
1047
1048 /*
1049 * Function via_ircc_dma_receive (self)
1050 *
1051 * Set configuration for receive a frame.
1052 *
1053 */
1054 static int via_ircc_dma_receive(struct via_ircc_cb *self)
1055 {
1056 int iobase;
1057
1058 iobase = self->io.fir_base;
1059
1060 IRDA_DEBUG(3, "%s()\n", __func__);
1061
1062 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1063 self->tx_fifo.tail = self->tx_buff.head;
1064 self->RxDataReady = 0;
1065 self->io.direction = IO_RECV;
1066 self->rx_buff.data = self->rx_buff.head;
1067 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1068 self->st_fifo.tail = self->st_fifo.head = 0;
1069
1070 EnPhys(iobase, ON);
1071 EnableTX(iobase, OFF);
1072 EnableRX(iobase, ON);
1073
1074 ResetChip(iobase, 0);
1075 ResetChip(iobase, 1);
1076 ResetChip(iobase, 2);
1077 ResetChip(iobase, 3);
1078 ResetChip(iobase, 4);
1079
1080 EnAllInt(iobase, ON);
1081 EnTXDMA(iobase, OFF);
1082 EnRXDMA(iobase, ON);
1083 irda_setup_dma(self->io.dma2, self->rx_buff_dma,
1084 self->rx_buff.truesize, DMA_RX_MODE);
1085 TXStart(iobase, OFF);
1086 RXStart(iobase, ON);
1087
1088 return 0;
1089 }
1090
1091 /*
1092 * Function via_ircc_dma_receive_complete (self)
1093 *
1094 * Controller Finished with receiving frames,
1095 * and this routine is call by ISR
1096 *
1097 */
1098 static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
1099 int iobase)
1100 {
1101 struct st_fifo *st_fifo;
1102 struct sk_buff *skb;
1103 int len, i;
1104 u8 status = 0;
1105
1106 iobase = self->io.fir_base;
1107 st_fifo = &self->st_fifo;
1108
1109 if (self->io.speed < 4000000) { //Speed below FIR
1110 len = GetRecvByte(iobase, self);
1111 skb = dev_alloc_skb(len + 1);
1112 if (skb == NULL)
1113 return FALSE;
1114 // Make sure IP header gets aligned
1115 skb_reserve(skb, 1);
1116 skb_put(skb, len - 2);
1117 if (self->chip_id == 0x3076) {
1118 for (i = 0; i < len - 2; i++)
1119 skb->data[i] = self->rx_buff.data[i * 2];
1120 } else {
1121 if (self->chip_id == 0x3096) {
1122 for (i = 0; i < len - 2; i++)
1123 skb->data[i] =
1124 self->rx_buff.data[i];
1125 }
1126 }
1127 // Move to next frame
1128 self->rx_buff.data += len;
1129 self->netdev->stats.rx_bytes += len;
1130 self->netdev->stats.rx_packets++;
1131 skb->dev = self->netdev;
1132 skb_reset_mac_header(skb);
1133 skb->protocol = htons(ETH_P_IRDA);
1134 netif_rx(skb);
1135 return TRUE;
1136 }
1137
1138 else { //FIR mode
1139 len = GetRecvByte(iobase, self);
1140 if (len == 0)
1141 return TRUE; //interrupt only, data maybe move by RxT
1142 if (((len - 4) < 2) || ((len - 4) > 2048)) {
1143 IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
1144 __func__, len, RxCurCount(iobase, self),
1145 self->RxLastCount);
1146 hwreset(self);
1147 return FALSE;
1148 }
1149 IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
1150 __func__,
1151 st_fifo->len, len - 4, RxCurCount(iobase, self));
1152
1153 st_fifo->entries[st_fifo->tail].status = status;
1154 st_fifo->entries[st_fifo->tail].len = len;
1155 st_fifo->pending_bytes += len;
1156 st_fifo->tail++;
1157 st_fifo->len++;
1158 if (st_fifo->tail > MAX_RX_WINDOW)
1159 st_fifo->tail = 0;
1160 self->RxDataReady = 0;
1161
1162 // It maybe have MAX_RX_WINDOW package receive by
1163 // receive_complete before Timer IRQ
1164 /* F01_S
1165 if (st_fifo->len < (MAX_RX_WINDOW+2 )) {
1166 RXStart(iobase,ON);
1167 SetTimer(iobase,4);
1168 }
1169 else {
1170 F01_E */
1171 EnableRX(iobase, OFF);
1172 EnRXDMA(iobase, OFF);
1173 RXStart(iobase, OFF);
1174 //F01_S
1175 // Put this entry back in fifo
1176 if (st_fifo->head > MAX_RX_WINDOW)
1177 st_fifo->head = 0;
1178 status = st_fifo->entries[st_fifo->head].status;
1179 len = st_fifo->entries[st_fifo->head].len;
1180 st_fifo->head++;
1181 st_fifo->len--;
1182
1183 skb = dev_alloc_skb(len + 1 - 4);
1184 /*
1185 * if frame size, data ptr, or skb ptr are wrong, then get next
1186 * entry.
1187 */
1188 if ((skb == NULL) || (skb->data == NULL) ||
1189 (self->rx_buff.data == NULL) || (len < 6)) {
1190 self->netdev->stats.rx_dropped++;
1191 kfree_skb(skb);
1192 return TRUE;
1193 }
1194 skb_reserve(skb, 1);
1195 skb_put(skb, len - 4);
1196
1197 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
1198 IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __func__,
1199 len - 4, self->rx_buff.data);
1200
1201 // Move to next frame
1202 self->rx_buff.data += len;
1203 self->netdev->stats.rx_bytes += len;
1204 self->netdev->stats.rx_packets++;
1205 skb->dev = self->netdev;
1206 skb_reset_mac_header(skb);
1207 skb->protocol = htons(ETH_P_IRDA);
1208 netif_rx(skb);
1209
1210 //F01_E
1211 } //FIR
1212 return TRUE;
1213
1214 }
1215
1216 /*
1217 * if frame is received , but no INT ,then use this routine to upload frame.
1218 */
1219 static int upload_rxdata(struct via_ircc_cb *self, int iobase)
1220 {
1221 struct sk_buff *skb;
1222 int len;
1223 struct st_fifo *st_fifo;
1224 st_fifo = &self->st_fifo;
1225
1226 len = GetRecvByte(iobase, self);
1227
1228 IRDA_DEBUG(2, "%s(): len=%x\n", __func__, len);
1229
1230 if ((len - 4) < 2) {
1231 self->netdev->stats.rx_dropped++;
1232 return FALSE;
1233 }
1234
1235 skb = dev_alloc_skb(len + 1);
1236 if (skb == NULL) {
1237 self->netdev->stats.rx_dropped++;
1238 return FALSE;
1239 }
1240 skb_reserve(skb, 1);
1241 skb_put(skb, len - 4 + 1);
1242 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
1243 st_fifo->tail++;
1244 st_fifo->len++;
1245 if (st_fifo->tail > MAX_RX_WINDOW)
1246 st_fifo->tail = 0;
1247 // Move to next frame
1248 self->rx_buff.data += len;
1249 self->netdev->stats.rx_bytes += len;
1250 self->netdev->stats.rx_packets++;
1251 skb->dev = self->netdev;
1252 skb_reset_mac_header(skb);
1253 skb->protocol = htons(ETH_P_IRDA);
1254 netif_rx(skb);
1255 if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
1256 RXStart(iobase, ON);
1257 } else {
1258 EnableRX(iobase, OFF);
1259 EnRXDMA(iobase, OFF);
1260 RXStart(iobase, OFF);
1261 }
1262 return TRUE;
1263 }
1264
1265 /*
1266 * Implement back to back receive , use this routine to upload data.
1267 */
1268
1269 static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
1270 {
1271 struct st_fifo *st_fifo;
1272 struct sk_buff *skb;
1273 int len;
1274 u8 status;
1275
1276 st_fifo = &self->st_fifo;
1277
1278 if (CkRxRecv(iobase, self)) {
1279 // if still receiving ,then return ,don't upload frame
1280 self->RetryCount = 0;
1281 SetTimer(iobase, 20);
1282 self->RxDataReady++;
1283 return FALSE;
1284 } else
1285 self->RetryCount++;
1286
1287 if ((self->RetryCount >= 1) ||
1288 ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize) ||
1289 (st_fifo->len >= (MAX_RX_WINDOW))) {
1290 while (st_fifo->len > 0) { //upload frame
1291 // Put this entry back in fifo
1292 if (st_fifo->head > MAX_RX_WINDOW)
1293 st_fifo->head = 0;
1294 status = st_fifo->entries[st_fifo->head].status;
1295 len = st_fifo->entries[st_fifo->head].len;
1296 st_fifo->head++;
1297 st_fifo->len--;
1298
1299 skb = dev_alloc_skb(len + 1 - 4);
1300 /*
1301 * if frame size, data ptr, or skb ptr are wrong,
1302 * then get next entry.
1303 */
1304 if ((skb == NULL) || (skb->data == NULL) ||
1305 (self->rx_buff.data == NULL) || (len < 6)) {
1306 self->netdev->stats.rx_dropped++;
1307 continue;
1308 }
1309 skb_reserve(skb, 1);
1310 skb_put(skb, len - 4);
1311 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
1312
1313 IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __func__,
1314 len - 4, st_fifo->head);
1315
1316 // Move to next frame
1317 self->rx_buff.data += len;
1318 self->netdev->stats.rx_bytes += len;
1319 self->netdev->stats.rx_packets++;
1320 skb->dev = self->netdev;
1321 skb_reset_mac_header(skb);
1322 skb->protocol = htons(ETH_P_IRDA);
1323 netif_rx(skb);
1324 } //while
1325 self->RetryCount = 0;
1326
1327 IRDA_DEBUG(2,
1328 "%s(): End of upload HostStatus=%x,RxStatus=%x\n",
1329 __func__,
1330 GetHostStatus(iobase), GetRXStatus(iobase));
1331
1332 /*
1333 * if frame is receive complete at this routine ,then upload
1334 * frame.
1335 */
1336 if ((GetRXStatus(iobase) & 0x10) &&
1337 (RxCurCount(iobase, self) != self->RxLastCount)) {
1338 upload_rxdata(self, iobase);
1339 if (irda_device_txqueue_empty(self->netdev))
1340 via_ircc_dma_receive(self);
1341 }
1342 } // timer detect complete
1343 else
1344 SetTimer(iobase, 4);
1345 return TRUE;
1346
1347 }
1348
1349
1350
1351 /*
1352 * Function via_ircc_interrupt (irq, dev_id)
1353 *
1354 * An interrupt from the chip has arrived. Time to do some work
1355 *
1356 */
1357 static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id)
1358 {
1359 struct net_device *dev = dev_id;
1360 struct via_ircc_cb *self = netdev_priv(dev);
1361 int iobase;
1362 u8 iHostIntType, iRxIntType, iTxIntType;
1363
1364 iobase = self->io.fir_base;
1365 spin_lock(&self->lock);
1366 iHostIntType = GetHostStatus(iobase);
1367
1368 IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n",
1369 __func__, iHostIntType,
1370 (iHostIntType & 0x40) ? "Timer" : "",
1371 (iHostIntType & 0x20) ? "Tx" : "",
1372 (iHostIntType & 0x10) ? "Rx" : "",
1373 (iHostIntType & 0x0e) >> 1);
1374
1375 if ((iHostIntType & 0x40) != 0) { //Timer Event
1376 self->EventFlag.TimeOut++;
1377 ClearTimerInt(iobase, 1);
1378 if (self->io.direction == IO_XMIT) {
1379 via_ircc_dma_xmit(self, iobase);
1380 }
1381 if (self->io.direction == IO_RECV) {
1382 /*
1383 * frame ready hold too long, must reset.
1384 */
1385 if (self->RxDataReady > 30) {
1386 hwreset(self);
1387 if (irda_device_txqueue_empty(self->netdev)) {
1388 via_ircc_dma_receive(self);
1389 }
1390 } else { // call this to upload frame.
1391 RxTimerHandler(self, iobase);
1392 }
1393 } //RECV
1394 } //Timer Event
1395 if ((iHostIntType & 0x20) != 0) { //Tx Event
1396 iTxIntType = GetTXStatus(iobase);
1397
1398 IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n",
1399 __func__, iTxIntType,
1400 (iTxIntType & 0x08) ? "FIFO underr." : "",
1401 (iTxIntType & 0x04) ? "EOM" : "",
1402 (iTxIntType & 0x02) ? "FIFO ready" : "",
1403 (iTxIntType & 0x01) ? "Early EOM" : "");
1404
1405 if (iTxIntType & 0x4) {
1406 self->EventFlag.EOMessage++; // read and will auto clean
1407 if (via_ircc_dma_xmit_complete(self)) {
1408 if (irda_device_txqueue_empty
1409 (self->netdev)) {
1410 via_ircc_dma_receive(self);
1411 }
1412 } else {
1413 self->EventFlag.Unknown++;
1414 }
1415 } //EOP
1416 } //Tx Event
1417 //----------------------------------------
1418 if ((iHostIntType & 0x10) != 0) { //Rx Event
1419 /* Check if DMA has finished */
1420 iRxIntType = GetRXStatus(iobase);
1421
1422 IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n",
1423 __func__, iRxIntType,
1424 (iRxIntType & 0x80) ? "PHY err." : "",
1425 (iRxIntType & 0x40) ? "CRC err" : "",
1426 (iRxIntType & 0x20) ? "FIFO overr." : "",
1427 (iRxIntType & 0x10) ? "EOF" : "",
1428 (iRxIntType & 0x08) ? "RxData" : "",
1429 (iRxIntType & 0x02) ? "RxMaxLen" : "",
1430 (iRxIntType & 0x01) ? "SIR bad" : "");
1431 if (!iRxIntType)
1432 IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __func__);
1433
1434 if (iRxIntType & 0x10) {
1435 if (via_ircc_dma_receive_complete(self, iobase)) {
1436 //F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self);
1437 via_ircc_dma_receive(self);
1438 }
1439 } // No ERR
1440 else { //ERR
1441 IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
1442 __func__, iRxIntType, iHostIntType,
1443 RxCurCount(iobase, self),
1444 self->RxLastCount);
1445
1446 if (iRxIntType & 0x20) { //FIFO OverRun ERR
1447 ResetChip(iobase, 0);
1448 ResetChip(iobase, 1);
1449 } else { //PHY,CRC ERR
1450
1451 if (iRxIntType != 0x08)
1452 hwreset(self); //F01
1453 }
1454 via_ircc_dma_receive(self);
1455 } //ERR
1456
1457 } //Rx Event
1458 spin_unlock(&self->lock);
1459 return IRQ_RETVAL(iHostIntType);
1460 }
1461
1462 static void hwreset(struct via_ircc_cb *self)
1463 {
1464 int iobase;
1465 iobase = self->io.fir_base;
1466
1467 IRDA_DEBUG(3, "%s()\n", __func__);
1468
1469 ResetChip(iobase, 5);
1470 EnableDMA(iobase, OFF);
1471 EnableTX(iobase, OFF);
1472 EnableRX(iobase, OFF);
1473 EnRXDMA(iobase, OFF);
1474 EnTXDMA(iobase, OFF);
1475 RXStart(iobase, OFF);
1476 TXStart(iobase, OFF);
1477 InitCard(iobase);
1478 CommonInit(iobase);
1479 SIRFilter(iobase, ON);
1480 SetSIR(iobase, ON);
1481 CRC16(iobase, ON);
1482 EnTXCRC(iobase, 0);
1483 WriteReg(iobase, I_ST_CT_0, 0x00);
1484 SetBaudRate(iobase, 9600);
1485 SetPulseWidth(iobase, 12);
1486 SetSendPreambleCount(iobase, 0);
1487 WriteReg(iobase, I_ST_CT_0, 0x80);
1488
1489 /* Restore speed. */
1490 via_ircc_change_speed(self, self->io.speed);
1491
1492 self->st_fifo.len = 0;
1493 }
1494
1495 /*
1496 * Function via_ircc_is_receiving (self)
1497 *
1498 * Return TRUE is we are currently receiving a frame
1499 *
1500 */
1501 static int via_ircc_is_receiving(struct via_ircc_cb *self)
1502 {
1503 int status = FALSE;
1504 int iobase;
1505
1506 IRDA_ASSERT(self != NULL, return FALSE;);
1507
1508 iobase = self->io.fir_base;
1509 if (CkRxRecv(iobase, self))
1510 status = TRUE;
1511
1512 IRDA_DEBUG(2, "%s(): status=%x....\n", __func__, status);
1513
1514 return status;
1515 }
1516
1517
1518 /*
1519 * Function via_ircc_net_open (dev)
1520 *
1521 * Start the device
1522 *
1523 */
1524 static int via_ircc_net_open(struct net_device *dev)
1525 {
1526 struct via_ircc_cb *self;
1527 int iobase;
1528 char hwname[32];
1529
1530 IRDA_DEBUG(3, "%s()\n", __func__);
1531
1532 IRDA_ASSERT(dev != NULL, return -1;);
1533 self = netdev_priv(dev);
1534 dev->stats.rx_packets = 0;
1535 IRDA_ASSERT(self != NULL, return 0;);
1536 iobase = self->io.fir_base;
1537 if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
1538 IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
1539 self->io.irq);
1540 return -EAGAIN;
1541 }
1542 /*
1543 * Always allocate the DMA channel after the IRQ, and clean up on
1544 * failure.
1545 */
1546 if (request_dma(self->io.dma, dev->name)) {
1547 IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
1548 self->io.dma);
1549 free_irq(self->io.irq, self);
1550 return -EAGAIN;
1551 }
1552 if (self->io.dma2 != self->io.dma) {
1553 if (request_dma(self->io.dma2, dev->name)) {
1554 IRDA_WARNING("%s, unable to allocate dma2=%d\n",
1555 driver_name, self->io.dma2);
1556 free_irq(self->io.irq, self);
1557 free_dma(self->io.dma);
1558 return -EAGAIN;
1559 }
1560 }
1561
1562
1563 /* turn on interrupts */
1564 EnAllInt(iobase, ON);
1565 EnInternalLoop(iobase, OFF);
1566 EnExternalLoop(iobase, OFF);
1567
1568 /* */
1569 via_ircc_dma_receive(self);
1570
1571 /* Ready to play! */
1572 netif_start_queue(dev);
1573
1574 /*
1575 * Open new IrLAP layer instance, now that everything should be
1576 * initialized properly
1577 */
1578 sprintf(hwname, "VIA @ 0x%x", iobase);
1579 self->irlap = irlap_open(dev, &self->qos, hwname);
1580
1581 self->RxLastCount = 0;
1582
1583 return 0;
1584 }
1585
1586 /*
1587 * Function via_ircc_net_close (dev)
1588 *
1589 * Stop the device
1590 *
1591 */
1592 static int via_ircc_net_close(struct net_device *dev)
1593 {
1594 struct via_ircc_cb *self;
1595 int iobase;
1596
1597 IRDA_DEBUG(3, "%s()\n", __func__);
1598
1599 IRDA_ASSERT(dev != NULL, return -1;);
1600 self = netdev_priv(dev);
1601 IRDA_ASSERT(self != NULL, return 0;);
1602
1603 /* Stop device */
1604 netif_stop_queue(dev);
1605 /* Stop and remove instance of IrLAP */
1606 if (self->irlap)
1607 irlap_close(self->irlap);
1608 self->irlap = NULL;
1609 iobase = self->io.fir_base;
1610 EnTXDMA(iobase, OFF);
1611 EnRXDMA(iobase, OFF);
1612 DisableDmaChannel(self->io.dma);
1613
1614 /* Disable interrupts */
1615 EnAllInt(iobase, OFF);
1616 free_irq(self->io.irq, dev);
1617 free_dma(self->io.dma);
1618 if (self->io.dma2 != self->io.dma)
1619 free_dma(self->io.dma2);
1620
1621 return 0;
1622 }
1623
1624 /*
1625 * Function via_ircc_net_ioctl (dev, rq, cmd)
1626 *
1627 * Process IOCTL commands for this device
1628 *
1629 */
1630 static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
1631 int cmd)
1632 {
1633 struct if_irda_req *irq = (struct if_irda_req *) rq;
1634 struct via_ircc_cb *self;
1635 unsigned long flags;
1636 int ret = 0;
1637
1638 IRDA_ASSERT(dev != NULL, return -1;);
1639 self = netdev_priv(dev);
1640 IRDA_ASSERT(self != NULL, return -1;);
1641 IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name,
1642 cmd);
1643 /* Disable interrupts & save flags */
1644 spin_lock_irqsave(&self->lock, flags);
1645 switch (cmd) {
1646 case SIOCSBANDWIDTH: /* Set bandwidth */
1647 if (!capable(CAP_NET_ADMIN)) {
1648 ret = -EPERM;
1649 goto out;
1650 }
1651 via_ircc_change_speed(self, irq->ifr_baudrate);
1652 break;
1653 case SIOCSMEDIABUSY: /* Set media busy */
1654 if (!capable(CAP_NET_ADMIN)) {
1655 ret = -EPERM;
1656 goto out;
1657 }
1658 irda_device_set_media_busy(self->netdev, TRUE);
1659 break;
1660 case SIOCGRECEIVING: /* Check if we are receiving right now */
1661 irq->ifr_receiving = via_ircc_is_receiving(self);
1662 break;
1663 default:
1664 ret = -EOPNOTSUPP;
1665 }
1666 out:
1667 spin_unlock_irqrestore(&self->lock, flags);
1668 return ret;
1669 }
1670
1671 MODULE_AUTHOR("VIA Technologies,inc");
1672 MODULE_DESCRIPTION("VIA IrDA Device Driver");
1673 MODULE_LICENSE("GPL");
1674
1675 module_init(via_ircc_init);
1676 module_exit(via_ircc_cleanup);
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