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1da177e4
LT		 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.
25985edc 32- Make sure SIR mode is set (hw_init()) before calling mode-dependent stuff.
1da177e4
LT		 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>
1da177e4 48#include <linux/init.h>
a6b7a407 49#include <linux/interrupt.h>
1da177e4
LT		 50#include <linux/rtnetlink.h>
51#include <linux/pci.h>
52#include <linux/dma-mapping.h>
5a0e3ad6 53#include <linux/gfp.h>
1da177e4
LT		 54
55#include <asm/io.h>
56#include <asm/dma.h>
57#include <asm/byteorder.h>
58
59#include <linux/pm.h>
60
61#include <net/irda/wrapper.h>
62#include <net/irda/irda.h>
63#include <net/irda/irda_device.h>
64
65#include "via-ircc.h"
66
67#define VIA_MODULE_NAME "via-ircc"
68#define CHIP_IO_EXTENT 0x40
69
70static char *driver_name = VIA_MODULE_NAME;
71
72/* Module parameters */
73static int qos_mtt_bits = 0x07; /* 1 ms or more */
74static int dongle_id = 0; /* default: probe */
75
76/* We can't guess the type of connected dongle, user *must* supply it. */
77module_param(dongle_id, int, 0);
78
1da177e4 79/* Some prototypes */
abc45592
BH		 80static int via_ircc_open(struct pci_dev *pdev, chipio_t * info,
81 unsigned int id);
1da177e4
LT		 82static int via_ircc_dma_receive(struct via_ircc_cb *self);
83static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
84 int iobase);
6518bbb8
SH		 85static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
86 struct net_device *dev);
87static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
88 struct net_device *dev);
1da177e4
LT		 89static void via_hw_init(struct via_ircc_cb *self);
90static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
7d12e780 91static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
1da177e4
LT		 92static int via_ircc_is_receiving(struct via_ircc_cb *self);
93static int via_ircc_read_dongle_id(int iobase);
94
95static int via_ircc_net_open(struct net_device *dev);
96static int via_ircc_net_close(struct net_device *dev);
97static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
98 int cmd);
1da177e4
LT		 99static void via_ircc_change_dongle_speed(int iobase, int speed,
100 int dongle_id);
101static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
102static void hwreset(struct via_ircc_cb *self);
103static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
104static int upload_rxdata(struct via_ircc_cb *self, int iobase);
45ac936c
BP		 105static int via_init_one(struct pci_dev *pcidev, const struct pci_device_id *id);
106static void via_remove_one (struct pci_dev *pdev);
1da177e4
LT		 107
108/* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
109static void iodelay(int udelay)
110{
111 u8 data;
112 int i;
113
114 for (i = 0; i < udelay; i++) {
115 data = inb(0x80);
116 }
117}
118
a3aa1884 119static DEFINE_PCI_DEVICE_TABLE(via_pci_tbl) = {
1da177e4
LT		 120 { PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
121 { PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
122 { PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
123 { PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
124 { PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
125 { 0, }
126};
127
128MODULE_DEVICE_TABLE(pci,via_pci_tbl);
129
130
131static struct pci_driver via_driver = {
132 .name = VIA_MODULE_NAME,
133 .id_table = via_pci_tbl,
134 .probe = via_init_one,
45ac936c 135 .remove = via_remove_one,
1da177e4
LT		 136};
137
138
139/*
140 * Function via_ircc_init ()
141 *
142 * Initialize chip. Just find out chip type and resource.
143 */
144static int __init via_ircc_init(void)
145{
146 int rc;
147
a97a6f10 148 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 149
150 rc = pci_register_driver(&via_driver);
151 if (rc < 0) {
152 IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n",
a97a6f10 153 __func__, rc);
1da177e4
LT		 154 return -ENODEV;
155 }
156 return 0;
157}
158
45ac936c 159static int via_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
1da177e4
LT		 160{
161 int rc;
162 u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
163 u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
164 chipio_t info;
165
a97a6f10 166 IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __func__, id->device);
1da177e4
LT		 167
168 rc = pci_enable_device (pcidev);
169 if (rc) {
a97a6f10 170 IRDA_DEBUG(0, "%s(): error rc = %d\n", __func__, rc);
1da177e4
LT		 171 return -ENODEV;
172 }
173
174 // South Bridge exist
175 if ( ReadLPCReg(0x20) != 0x3C )
176 Chipset=0x3096;
177 else
178 Chipset=0x3076;
179
180 if (Chipset==0x3076) {
a97a6f10 181 IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __func__);
1da177e4
LT		 182
183 WriteLPCReg(7,0x0c );
184 temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
185 if((temp&0x01)==1) { // BIOS close or no FIR
186 WriteLPCReg(0x1d, 0x82 );
187 WriteLPCReg(0x23,0x18);
188 temp=ReadLPCReg(0xF0);
189 if((temp&0x01)==0) {
190 temp=(ReadLPCReg(0x74)&0x03); //DMA
191 FirDRQ0=temp + 4;
192 temp=(ReadLPCReg(0x74)&0x0C) >> 2;
193 FirDRQ1=temp + 4;
194 } else {
195 temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA
196 FirDRQ0=temp + 4;
197 FirDRQ1=FirDRQ0;
198 }
199 FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ
200 FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte
201 FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte
202 FirIOBase=FirIOBase ;
203 info.fir_base=FirIOBase;
204 info.irq=FirIRQ;
205 info.dma=FirDRQ1;
206 info.dma2=FirDRQ0;
207 pci_read_config_byte(pcidev,0x40,&bTmp);
208 pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
209 pci_read_config_byte(pcidev,0x42,&bTmp);
210 pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
211 pci_write_config_byte(pcidev,0x5a,0xc0);
212 WriteLPCReg(0x28, 0x70 );
abc45592 213 if (via_ircc_open(pcidev, &info, 0x3076) == 0)
1da177e4
LT		 214 rc=0;
215 } else
216 rc = -ENODEV; //IR not turn on
217 } else { //Not VT1211
a97a6f10 218 IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __func__);
1da177e4
LT		 219
220 pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
221 if((bTmp&0x01)==1) { // BIOS enable FIR
222 //Enable Double DMA clock
223 pci_read_config_byte(pcidev,0x42,&oldPCI_40);
224 pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
225 pci_read_config_byte(pcidev,0x40,&oldPCI_40);
226 pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
227 pci_read_config_byte(pcidev,0x44,&oldPCI_44);
228 pci_write_config_byte(pcidev,0x44,0x4e);
229 //---------- read configuration from Function0 of south bridge
230 if((bTmp&0x02)==0) {
231 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
232 FirDRQ0 = (bTmp1 & 0x30) >> 4;
233 pci_read_config_byte(pcidev,0x44,&bTmp1);
234 FirDRQ1 = (bTmp1 & 0xc0) >> 6;
235 } else {
236 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
237 FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
238 FirDRQ1=0;
239 }
240 pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ
241 FirIRQ = bTmp1 & 0x0f;
242
243 pci_read_config_byte(pcidev,0x69,&bTmp);
244 FirIOBase = bTmp << 8;//hight byte
245 pci_read_config_byte(pcidev,0x68,&bTmp);
246 FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
247 //-------------------------
248 info.fir_base=FirIOBase;
249 info.irq=FirIRQ;
250 info.dma=FirDRQ1;
251 info.dma2=FirDRQ0;
abc45592 252 if (via_ircc_open(pcidev, &info, 0x3096) == 0)
1da177e4
LT		 253 rc=0;
254 } else
255 rc = -ENODEV; //IR not turn on !!!!!
256 }//Not VT1211
257
a97a6f10 258 IRDA_DEBUG(2, "%s(): End - rc = %d\n", __func__, rc);
1da177e4
LT		 259 return rc;
260}
261
1da177e4
LT		 262static void __exit via_ircc_cleanup(void)
263{
a97a6f10 264 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4 265
1da177e4
LT		 266 /* Cleanup all instances of the driver */
267 pci_unregister_driver (&via_driver);
268}
269
0bd11f27
SH		 270static const struct net_device_ops via_ircc_sir_ops = {
271 .ndo_start_xmit = via_ircc_hard_xmit_sir,
272 .ndo_open = via_ircc_net_open,
273 .ndo_stop = via_ircc_net_close,
274 .ndo_do_ioctl = via_ircc_net_ioctl,
275};
276static const struct net_device_ops via_ircc_fir_ops = {
277 .ndo_start_xmit = via_ircc_hard_xmit_fir,
278 .ndo_open = via_ircc_net_open,
279 .ndo_stop = via_ircc_net_close,
280 .ndo_do_ioctl = via_ircc_net_ioctl,
281};
282
1da177e4 283/*
abc45592 284 * Function via_ircc_open(pdev, iobase, irq)
1da177e4
LT		 285 *
286 * Open driver instance
287 *
288 */
45ac936c
BP		 289static int via_ircc_open(struct pci_dev *pdev, chipio_t *info,
290 unsigned int id)
1da177e4
LT		 291{
292 struct net_device *dev;
293 struct via_ircc_cb *self;
294 int err;
295
a97a6f10 296 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 297
298 /* Allocate new instance of the driver */
299 dev = alloc_irdadev(sizeof(struct via_ircc_cb));
300 if (dev == NULL)
301 return -ENOMEM;
302
4cf1653a 303 self = netdev_priv(dev);
1da177e4
LT		 304 self->netdev = dev;
305 spin_lock_init(&self->lock);
306
abc45592
BH		 307 pci_set_drvdata(pdev, self);
308
1da177e4
LT		 309 /* Initialize Resource */
310 self->io.cfg_base = info->cfg_base;
311 self->io.fir_base = info->fir_base;
312 self->io.irq = info->irq;
313 self->io.fir_ext = CHIP_IO_EXTENT;
314 self->io.dma = info->dma;
315 self->io.dma2 = info->dma2;
316 self->io.fifo_size = 32;
317 self->chip_id = id;
318 self->st_fifo.len = 0;
319 self->RxDataReady = 0;
320
321 /* Reserve the ioports that we need */
322 if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
323 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
a97a6f10 324 __func__, self->io.fir_base);
1da177e4
LT		 325 err = -ENODEV;
326 goto err_out1;
327 }
328
329 /* Initialize QoS for this device */
330 irda_init_max_qos_capabilies(&self->qos);
331
332 /* Check if user has supplied the dongle id or not */
333 if (!dongle_id)
334 dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
335 self->io.dongle_id = dongle_id;
336
337 /* The only value we must override it the baudrate */
25985edc 338 /* Maximum speeds and capabilities are dongle-dependent. */
1da177e4
LT		 339 switch( self->io.dongle_id ){
340 case 0x0d:
341 self->qos.baud_rate.bits =
342 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
343 IR_576000 | IR_1152000 | (IR_4000000 << 8);
344 break;
345 default:
346 self->qos.baud_rate.bits =
347 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
348 break;
349 }
350
351 /* Following was used for testing:
352 *
353 * self->qos.baud_rate.bits = IR_9600;
354 *
355 * Is is no good, as it prohibits (error-prone) speed-changes.
356 */
357
358 self->qos.min_turn_time.bits = qos_mtt_bits;
359 irda_qos_bits_to_value(&self->qos);
360
361 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
362 self->rx_buff.truesize = 14384 + 2048;
363 self->tx_buff.truesize = 14384 + 2048;
364
365 /* Allocate memory if needed */
366 self->rx_buff.head =
fd1d9188 367 dma_alloc_coherent(&pdev->dev, self->rx_buff.truesize,
1da177e4
LT		 368 &self->rx_buff_dma, GFP_KERNEL);
369 if (self->rx_buff.head == NULL) {
370 err = -ENOMEM;
371 goto err_out2;
372 }
373 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
374
375 self->tx_buff.head =
fd1d9188 376 dma_alloc_coherent(&pdev->dev, self->tx_buff.truesize,
1da177e4
LT		 377 &self->tx_buff_dma, GFP_KERNEL);
378 if (self->tx_buff.head == NULL) {
379 err = -ENOMEM;
380 goto err_out3;
381 }
382 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
383
384 self->rx_buff.in_frame = FALSE;
385 self->rx_buff.state = OUTSIDE_FRAME;
386 self->tx_buff.data = self->tx_buff.head;
387 self->rx_buff.data = self->rx_buff.head;
388
389 /* Reset Tx queue info */
390 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
391 self->tx_fifo.tail = self->tx_buff.head;
392
1da177e4 393 /* Override the network functions we need to use */
0bd11f27 394 dev->netdev_ops = &via_ircc_sir_ops;
1da177e4
LT		 395
396 err = register_netdev(dev);
397 if (err)
398 goto err_out4;
399
400 IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);
401
402 /* Initialise the hardware..
403 */
404 self->io.speed = 9600;
405 via_hw_init(self);
406 return 0;
407 err_out4:
fd1d9188 408 dma_free_coherent(&pdev->dev, self->tx_buff.truesize,
1da177e4
LT		 409 self->tx_buff.head, self->tx_buff_dma);
410 err_out3:
fd1d9188 411 dma_free_coherent(&pdev->dev, self->rx_buff.truesize,
1da177e4
LT		 412 self->rx_buff.head, self->rx_buff_dma);
413 err_out2:
414 release_region(self->io.fir_base, self->io.fir_ext);
415 err_out1:
abc45592 416 pci_set_drvdata(pdev, NULL);
1da177e4 417 free_netdev(dev);
1da177e4
LT		 418 return err;
419}
420
421/*
abc45592 422 * Function via_remove_one(pdev)
1da177e4
LT		 423 *
424 * Close driver instance
425 *
426 */
45ac936c 427static void via_remove_one(struct pci_dev *pdev)
1da177e4 428{
abc45592 429 struct via_ircc_cb *self = pci_get_drvdata(pdev);
1da177e4
LT		 430 int iobase;
431
a97a6f10 432 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4 433
1da177e4
LT		 434 iobase = self->io.fir_base;
435
436 ResetChip(iobase, 5); //hardware reset.
437 /* Remove netdevice */
438 unregister_netdev(self->netdev);
439
440 /* Release the PORT that this driver is using */
441 IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
a97a6f10 442 __func__, self->io.fir_base);
1da177e4
LT		 443 release_region(self->io.fir_base, self->io.fir_ext);
444 if (self->tx_buff.head)
fd1d9188 445 dma_free_coherent(&pdev->dev, self->tx_buff.truesize,
1da177e4
LT		 446 self->tx_buff.head, self->tx_buff_dma);
447 if (self->rx_buff.head)
fd1d9188 448 dma_free_coherent(&pdev->dev, self->rx_buff.truesize,
1da177e4 449 self->rx_buff.head, self->rx_buff_dma);
abc45592 450 pci_set_drvdata(pdev, NULL);
1da177e4
LT		 451
452 free_netdev(self->netdev);
453
abc45592 454 pci_disable_device(pdev);
1da177e4
LT		 455}
456
457/*
458 * Function via_hw_init(self)
459 *
460 * Returns non-negative on success.
461 *
462 * Formerly via_ircc_setup
463 */
464static void via_hw_init(struct via_ircc_cb *self)
465{
466 int iobase = self->io.fir_base;
467
a97a6f10 468 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 469
470 SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095
471 // FIFO Init
472 EnRXFIFOReadyInt(iobase, OFF);
473 EnRXFIFOHalfLevelInt(iobase, OFF);
474 EnTXFIFOHalfLevelInt(iobase, OFF);
475 EnTXFIFOUnderrunEOMInt(iobase, ON);
476 EnTXFIFOReadyInt(iobase, OFF);
477 InvertTX(iobase, OFF);
478 InvertRX(iobase, OFF);
479
480 if (ReadLPCReg(0x20) == 0x3c)
481 WriteLPCReg(0xF0, 0); // for VT1211
482 /* Int Init */
483 EnRXSpecInt(iobase, ON);
484
485 /* The following is basically hwreset */
486 /* If this is the case, why not just call hwreset() ? Jean II */
487 ResetChip(iobase, 5);
488 EnableDMA(iobase, OFF);
489 EnableTX(iobase, OFF);
490 EnableRX(iobase, OFF);
491 EnRXDMA(iobase, OFF);
492 EnTXDMA(iobase, OFF);
493 RXStart(iobase, OFF);
494 TXStart(iobase, OFF);
495 InitCard(iobase);
496 CommonInit(iobase);
497 SIRFilter(iobase, ON);
498 SetSIR(iobase, ON);
499 CRC16(iobase, ON);
500 EnTXCRC(iobase, 0);
501 WriteReg(iobase, I_ST_CT_0, 0x00);
502 SetBaudRate(iobase, 9600);
503 SetPulseWidth(iobase, 12);
504 SetSendPreambleCount(iobase, 0);
505
506 self->io.speed = 9600;
507 self->st_fifo.len = 0;
508
509 via_ircc_change_dongle_speed(iobase, self->io.speed,
510 self->io.dongle_id);
511
512 WriteReg(iobase, I_ST_CT_0, 0x80);
513}
514
515/*
516 * Function via_ircc_read_dongle_id (void)
517 *
518 */
519static int via_ircc_read_dongle_id(int iobase)
520{
521 int dongle_id = 9; /* Default to IBM */
522
523 IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
524 return dongle_id;
525}
526
527/*
528 * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
529 * Change speed of the attach dongle
530 * only implement two type of dongle currently.
531 */
532static void via_ircc_change_dongle_speed(int iobase, int speed,
533 int dongle_id)
534{
535 u8 mode = 0;
536
537 /* speed is unused, as we use IsSIROn()/IsMIROn() */
538 speed = speed;
539
540 IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
a97a6f10 541 __func__, speed, iobase, dongle_id);
1da177e4
LT		 542
543 switch (dongle_id) {
544
545 /* Note: The dongle_id's listed here are derived from
546 * nsc-ircc.c */
547
548 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
549 UseOneRX(iobase, ON); // use one RX pin RX1,RX2
550 InvertTX(iobase, OFF);
551 InvertRX(iobase, OFF);
552
553 EnRX2(iobase, ON); //sir to rx2
554 EnGPIOtoRX2(iobase, OFF);
555
556 if (IsSIROn(iobase)) { //sir
557 // Mode select Off
558 SlowIRRXLowActive(iobase, ON);
559 udelay(1000);
560 SlowIRRXLowActive(iobase, OFF);
561 } else {
562 if (IsMIROn(iobase)) { //mir
563 // Mode select On
564 SlowIRRXLowActive(iobase, OFF);
565 udelay(20);
566 } else { // fir
567 if (IsFIROn(iobase)) { //fir
568 // Mode select On
569 SlowIRRXLowActive(iobase, OFF);
570 udelay(20);
571 }
572 }
573 }
574 break;
575
576 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
577 UseOneRX(iobase, ON); //use ONE RX....RX1
578 InvertTX(iobase, OFF);
579 InvertRX(iobase, OFF); // invert RX pin
580
581 EnRX2(iobase, ON);
582 EnGPIOtoRX2(iobase, OFF);
583 if (IsSIROn(iobase)) { //sir
584 // Mode select On
585 SlowIRRXLowActive(iobase, ON);
586 udelay(20);
587 // Mode select Off
588 SlowIRRXLowActive(iobase, OFF);
589 }
590 if (IsMIROn(iobase)) { //mir
591 // Mode select On
592 SlowIRRXLowActive(iobase, OFF);
593 udelay(20);
594 // Mode select Off
595 SlowIRRXLowActive(iobase, ON);
596 } else { // fir
597 if (IsFIROn(iobase)) { //fir
598 // Mode select On
599 SlowIRRXLowActive(iobase, OFF);
600 // TX On
601 WriteTX(iobase, ON);
602 udelay(20);
603 // Mode select OFF
604 SlowIRRXLowActive(iobase, ON);
605 udelay(20);
606 // TX Off
607 WriteTX(iobase, OFF);
608 }
609 }
610 break;
611
612 case 0x0d:
613 UseOneRX(iobase, OFF); // use two RX pin RX1,RX2
614 InvertTX(iobase, OFF);
615 InvertRX(iobase, OFF);
616 SlowIRRXLowActive(iobase, OFF);
617 if (IsSIROn(iobase)) { //sir
618 EnGPIOtoRX2(iobase, OFF);
619 WriteGIO(iobase, OFF);
620 EnRX2(iobase, OFF); //sir to rx2
621 } else { // fir mir
622 EnGPIOtoRX2(iobase, OFF);
623 WriteGIO(iobase, OFF);
624 EnRX2(iobase, OFF); //fir to rx
625 }
626 break;
627
628 case 0x11: /* Temic TFDS4500 */
629
a97a6f10 630 IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __func__);
1da177e4
LT		 631
632 UseOneRX(iobase, ON); //use ONE RX....RX1
633 InvertTX(iobase, OFF);
634 InvertRX(iobase, ON); // invert RX pin
635
636 EnRX2(iobase, ON); //sir to rx2
637 EnGPIOtoRX2(iobase, OFF);
638
639 if( IsSIROn(iobase) ){ //sir
640
641 // Mode select On
642 SlowIRRXLowActive(iobase, ON);
643 udelay(20);
644 // Mode select Off
645 SlowIRRXLowActive(iobase, OFF);
646
647 } else{
a97a6f10 648 IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __func__);
1da177e4
LT		 649 }
650 break;
651
652 case 0x0ff: /* Vishay */
653 if (IsSIROn(iobase))
654 mode = 0;
655 else if (IsMIROn(iobase))
656 mode = 1;
657 else if (IsFIROn(iobase))
658 mode = 2;
659 else if (IsVFIROn(iobase))
660 mode = 5; //VFIR-16
661 SI_SetMode(iobase, mode);
662 break;
663
664 default:
665 IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
a97a6f10 666 __func__, dongle_id);
1da177e4
LT		 667 }
668}
669
670/*
671 * Function via_ircc_change_speed (self, baud)
672 *
673 * Change the speed of the device
674 *
675 */
676static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
677{
678 struct net_device *dev = self->netdev;
679 u16 iobase;
680 u8 value = 0, bTmp;
681
682 iobase = self->io.fir_base;
683 /* Update accounting for new speed */
684 self->io.speed = speed;
a97a6f10 685 IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __func__, speed);
1da177e4
LT		 686
687 WriteReg(iobase, I_ST_CT_0, 0x0);
688
689 /* Controller mode sellection */
690 switch (speed) {
691 case 2400:
692 case 9600:
693 case 19200:
694 case 38400:
695 case 57600:
696 case 115200:
697 value = (115200/speed)-1;
698 SetSIR(iobase, ON);
699 CRC16(iobase, ON);
700 break;
701 case 576000:
702 /* FIXME: this can't be right, as it's the same as 115200,
703 * and 576000 is MIR, not SIR. */
704 value = 0;
705 SetSIR(iobase, ON);
706 CRC16(iobase, ON);
707 break;
708 case 1152000:
709 value = 0;
710 SetMIR(iobase, ON);
711 /* FIXME: CRC ??? */
712 break;
713 case 4000000:
714 value = 0;
715 SetFIR(iobase, ON);
716 SetPulseWidth(iobase, 0);
717 SetSendPreambleCount(iobase, 14);
718 CRC16(iobase, OFF);
719 EnTXCRC(iobase, ON);
720 break;
721 case 16000000:
722 value = 0;
723 SetVFIR(iobase, ON);
724 /* FIXME: CRC ??? */
725 break;
726 default:
727 value = 0;
728 break;
729 }
730
731 /* Set baudrate to 0x19[2..7] */
732 bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
733 bTmp |= value << 2;
734 WriteReg(iobase, I_CF_H_1, bTmp);
735
736 /* Some dongles may need to be informed about speed changes. */
737 via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
738
739 /* Set FIFO size to 64 */
740 SetFIFO(iobase, 64);
741
742 /* Enable IR */
743 WriteReg(iobase, I_ST_CT_0, 0x80);
744
745 // EnTXFIFOHalfLevelInt(iobase,ON);
746
747 /* Enable some interrupts so we can receive frames */
748 //EnAllInt(iobase,ON);
749
750 if (IsSIROn(iobase)) {
751 SIRFilter(iobase, ON);
752 SIRRecvAny(iobase, ON);
753 } else {
754 SIRFilter(iobase, OFF);
755 SIRRecvAny(iobase, OFF);
756 }
757
758 if (speed > 115200) {
759 /* Install FIR xmit handler */
0bd11f27 760 dev->netdev_ops = &via_ircc_fir_ops;
1da177e4
LT		 761 via_ircc_dma_receive(self);
762 } else {
763 /* Install SIR xmit handler */
0bd11f27 764 dev->netdev_ops = &via_ircc_sir_ops;
1da177e4
LT		 765 }
766 netif_wake_queue(dev);
767}
768
769/*
770 * Function via_ircc_hard_xmit (skb, dev)
771 *
772 * Transmit the frame!
773 *
774 */
6518bbb8
SH		 775static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
776 struct net_device *dev)
1da177e4
LT		 777{
778 struct via_ircc_cb *self;
779 unsigned long flags;
780 u16 iobase;
781 __u32 speed;
782
4cf1653a 783 self = netdev_priv(dev);
ec634fe3 784 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1da177e4
LT		 785 iobase = self->io.fir_base;
786
787 netif_stop_queue(dev);
788 /* Check if we need to change the speed */
789 speed = irda_get_next_speed(skb);
790 if ((speed != self->io.speed) && (speed != -1)) {
791 /* Check for empty frame */
792 if (!skb->len) {
793 via_ircc_change_speed(self, speed);
794 dev->trans_start = jiffies;
795 dev_kfree_skb(skb);
6ed10654 796 return NETDEV_TX_OK;
1da177e4
LT		 797 } else
798 self->new_speed = speed;
799 }
800 InitCard(iobase);
801 CommonInit(iobase);
802 SIRFilter(iobase, ON);
803 SetSIR(iobase, ON);
804 CRC16(iobase, ON);
805 EnTXCRC(iobase, 0);
806 WriteReg(iobase, I_ST_CT_0, 0x00);
807
808 spin_lock_irqsave(&self->lock, flags);
809 self->tx_buff.data = self->tx_buff.head;
810 self->tx_buff.len =
811 async_wrap_skb(skb, self->tx_buff.data,
812 self->tx_buff.truesize);
813
af049081 814 dev->stats.tx_bytes += self->tx_buff.len;
1da177e4
LT		 815 /* Send this frame with old speed */
816 SetBaudRate(iobase, self->io.speed);
817 SetPulseWidth(iobase, 12);
818 SetSendPreambleCount(iobase, 0);
819 WriteReg(iobase, I_ST_CT_0, 0x80);
820
821 EnableTX(iobase, ON);
822 EnableRX(iobase, OFF);
823
824 ResetChip(iobase, 0);
825 ResetChip(iobase, 1);
826 ResetChip(iobase, 2);
827 ResetChip(iobase, 3);
828 ResetChip(iobase, 4);
829
830 EnAllInt(iobase, ON);
831 EnTXDMA(iobase, ON);
832 EnRXDMA(iobase, OFF);
833
834 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
835 DMA_TX_MODE);
836
837 SetSendByte(iobase, self->tx_buff.len);
838 RXStart(iobase, OFF);
839 TXStart(iobase, ON);
840
841 dev->trans_start = jiffies;
842 spin_unlock_irqrestore(&self->lock, flags);
843 dev_kfree_skb(skb);
6ed10654 844 return NETDEV_TX_OK;
1da177e4
LT		 845}
846
6518bbb8
SH		 847static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
848 struct net_device *dev)
1da177e4
LT		 849{
850 struct via_ircc_cb *self;
851 u16 iobase;
852 __u32 speed;
853 unsigned long flags;
854
4cf1653a 855 self = netdev_priv(dev);
1da177e4
LT		 856 iobase = self->io.fir_base;
857
858 if (self->st_fifo.len)
6ed10654 859 return NETDEV_TX_OK;
1da177e4
LT		 860 if (self->chip_id == 0x3076)
861 iodelay(1500);
862 else
863 udelay(1500);
864 netif_stop_queue(dev);
865 speed = irda_get_next_speed(skb);
866 if ((speed != self->io.speed) && (speed != -1)) {
867 if (!skb->len) {
868 via_ircc_change_speed(self, speed);
869 dev->trans_start = jiffies;
870 dev_kfree_skb(skb);
6ed10654 871 return NETDEV_TX_OK;
1da177e4
LT		 872 } else
873 self->new_speed = speed;
874 }
875 spin_lock_irqsave(&self->lock, flags);
876 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
877 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
878
879 self->tx_fifo.tail += skb->len;
af049081 880 dev->stats.tx_bytes += skb->len;
d626f62b
ACM		 881 skb_copy_from_linear_data(skb,
882 self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
1da177e4
LT		 883 self->tx_fifo.len++;
884 self->tx_fifo.free++;
885//F01 if (self->tx_fifo.len == 1) {
886 via_ircc_dma_xmit(self, iobase);
887//F01 }
888//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
889 dev->trans_start = jiffies;
890 dev_kfree_skb(skb);
891 spin_unlock_irqrestore(&self->lock, flags);
6ed10654 892 return NETDEV_TX_OK;
1da177e4
LT		 893
894}
895
896static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
897{
898 EnTXDMA(iobase, OFF);
899 self->io.direction = IO_XMIT;
900 EnPhys(iobase, ON);
901 EnableTX(iobase, ON);
902 EnableRX(iobase, OFF);
903 ResetChip(iobase, 0);
904 ResetChip(iobase, 1);
905 ResetChip(iobase, 2);
906 ResetChip(iobase, 3);
907 ResetChip(iobase, 4);
908 EnAllInt(iobase, ON);
909 EnTXDMA(iobase, ON);
910 EnRXDMA(iobase, OFF);
911 irda_setup_dma(self->io.dma,
912 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
913 self->tx_buff.head) + self->tx_buff_dma,
914 self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
915 IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
a97a6f10 916 __func__, self->tx_fifo.ptr,
1da177e4
LT		 917 self->tx_fifo.queue[self->tx_fifo.ptr].len,
918 self->tx_fifo.len);
919
920 SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
921 RXStart(iobase, OFF);
922 TXStart(iobase, ON);
923 return 0;
924
925}
926
927/*
928 * Function via_ircc_dma_xmit_complete (self)
929 *
930 * The transfer of a frame in finished. This function will only be called
931 * by the interrupt handler
932 *
933 */
934static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
935{
936 int iobase;
937 int ret = TRUE;
938 u8 Tx_status;
939
a97a6f10 940 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 941
942 iobase = self->io.fir_base;
943 /* Disable DMA */
944// DisableDmaChannel(self->io.dma);
42b2aa86 945 /* Check for underrun! */
1da177e4
LT		 946 /* Clear bit, by writing 1 into it */
947 Tx_status = GetTXStatus(iobase);
948 if (Tx_status & 0x08) {
af049081
SH		 949 self->netdev->stats.tx_errors++;
950 self->netdev->stats.tx_fifo_errors++;
1da177e4 951 hwreset(self);
42b2aa86 952 /* how to clear underrun? */
1da177e4 953 } else {
af049081 954 self->netdev->stats.tx_packets++;
1da177e4
LT		 955 ResetChip(iobase, 3);
956 ResetChip(iobase, 4);
957 }
958 /* Check if we need to change the speed */
959 if (self->new_speed) {
960 via_ircc_change_speed(self, self->new_speed);
961 self->new_speed = 0;
962 }
963
964 /* Finished with this frame, so prepare for next */
965 if (IsFIROn(iobase)) {
966 if (self->tx_fifo.len) {
967 self->tx_fifo.len--;
968 self->tx_fifo.ptr++;
969 }
970 }
971 IRDA_DEBUG(1,
972 "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
a97a6f10 973 __func__,
1da177e4
LT		 974 self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
975/* F01_S
976 // Any frames to be sent back-to-back?
977 if (self->tx_fifo.len) {
978 // Not finished yet!
979 via_ircc_dma_xmit(self, iobase);
980 ret = FALSE;
981 } else {
982F01_E*/
983 // Reset Tx FIFO info
984 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
985 self->tx_fifo.tail = self->tx_buff.head;
986//F01 }
987
988 // Make sure we have room for more frames
989//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
990 // Not busy transmitting anymore
991 // Tell the network layer, that we can accept more frames
992 netif_wake_queue(self->netdev);
993//F01 }
994 return ret;
995}
996
997/*
998 * Function via_ircc_dma_receive (self)
999 *
1000 * Set configuration for receive a frame.
1001 *
1002 */
1003static int via_ircc_dma_receive(struct via_ircc_cb *self)
1004{
1005 int iobase;
1006
1007 iobase = self->io.fir_base;
1008
a97a6f10 1009 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 1010
1011 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1012 self->tx_fifo.tail = self->tx_buff.head;
1013 self->RxDataReady = 0;
1014 self->io.direction = IO_RECV;
1015 self->rx_buff.data = self->rx_buff.head;
1016 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1017 self->st_fifo.tail = self->st_fifo.head = 0;
1018
1019 EnPhys(iobase, ON);
1020 EnableTX(iobase, OFF);
1021 EnableRX(iobase, ON);
1022
1023 ResetChip(iobase, 0);
1024 ResetChip(iobase, 1);
1025 ResetChip(iobase, 2);
1026 ResetChip(iobase, 3);
1027 ResetChip(iobase, 4);
1028
1029 EnAllInt(iobase, ON);
1030 EnTXDMA(iobase, OFF);
1031 EnRXDMA(iobase, ON);
1032 irda_setup_dma(self->io.dma2, self->rx_buff_dma,
1033 self->rx_buff.truesize, DMA_RX_MODE);
1034 TXStart(iobase, OFF);
1035 RXStart(iobase, ON);
1036
1037 return 0;
1038}
1039
1040/*
1041 * Function via_ircc_dma_receive_complete (self)
1042 *
1043 * Controller Finished with receiving frames,
1044 * and this routine is call by ISR
1045 *
1046 */
1047static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
1048 int iobase)
1049{
1050 struct st_fifo *st_fifo;
1051 struct sk_buff *skb;
1052 int len, i;
1053 u8 status = 0;
1054
1055 iobase = self->io.fir_base;
1056 st_fifo = &self->st_fifo;
1057
1058 if (self->io.speed < 4000000) { //Speed below FIR
1059 len = GetRecvByte(iobase, self);
1060 skb = dev_alloc_skb(len + 1);
1061 if (skb == NULL)
1062 return FALSE;
1063 // Make sure IP header gets aligned
1064 skb_reserve(skb, 1);
1065 skb_put(skb, len - 2);
1066 if (self->chip_id == 0x3076) {
1067 for (i = 0; i < len - 2; i++)
1068 skb->data[i] = self->rx_buff.data[i * 2];
1069 } else {
1070 if (self->chip_id == 0x3096) {
1071 for (i = 0; i < len - 2; i++)
1072 skb->data[i] =
1073 self->rx_buff.data[i];
1074 }
1075 }
1076 // Move to next frame
1077 self->rx_buff.data += len;
af049081
SH		 1078 self->netdev->stats.rx_bytes += len;
1079 self->netdev->stats.rx_packets++;
1da177e4 1080 skb->dev = self->netdev;
459a98ed 1081 skb_reset_mac_header(skb);
1da177e4
LT		 1082 skb->protocol = htons(ETH_P_IRDA);
1083 netif_rx(skb);
1084 return TRUE;
1085 }
1086
1087 else { //FIR mode
1088 len = GetRecvByte(iobase, self);
1089 if (len == 0)
1090 return TRUE; //interrupt only, data maybe move by RxT
1091 if (((len - 4) < 2) || ((len - 4) > 2048)) {
1092 IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
a97a6f10 1093 __func__, len, RxCurCount(iobase, self),
1da177e4
LT		 1094 self->RxLastCount);
1095 hwreset(self);
1096 return FALSE;
1097 }
1098 IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
a97a6f10 1099 __func__,
1da177e4
LT		 1100 st_fifo->len, len - 4, RxCurCount(iobase, self));
1101
1102 st_fifo->entries[st_fifo->tail].status = status;
1103 st_fifo->entries[st_fifo->tail].len = len;
1104 st_fifo->pending_bytes += len;
1105 st_fifo->tail++;
1106 st_fifo->len++;
1107 if (st_fifo->tail > MAX_RX_WINDOW)
1108 st_fifo->tail = 0;
1109 self->RxDataReady = 0;
1110
1111 // It maybe have MAX_RX_WINDOW package receive by
1112 // receive_complete before Timer IRQ
1113/* F01_S
1114 if (st_fifo->len < (MAX_RX_WINDOW+2 )) {
1115 RXStart(iobase,ON);
1116 SetTimer(iobase,4);
1117 }
1118 else {
1119F01_E */
1120 EnableRX(iobase, OFF);
1121 EnRXDMA(iobase, OFF);
1122 RXStart(iobase, OFF);
1123//F01_S
1124 // Put this entry back in fifo
1125 if (st_fifo->head > MAX_RX_WINDOW)
1126 st_fifo->head = 0;
1127 status = st_fifo->entries[st_fifo->head].status;
1128 len = st_fifo->entries[st_fifo->head].len;
1129 st_fifo->head++;
1130 st_fifo->len--;
1131
1132 skb = dev_alloc_skb(len + 1 - 4);
1133 /*
8d34e7d6 1134 * if frame size, data ptr, or skb ptr are wrong, then get next
1da177e4
LT		 1135 * entry.
1136 */
8e95a202
JP		 1137 if ((skb == NULL) || (skb->data == NULL) ||
1138 (self->rx_buff.data == NULL) || (len < 6)) {
af049081 1139 self->netdev->stats.rx_dropped++;
8d34e7d6 1140 kfree_skb(skb);
1da177e4
LT		 1141 return TRUE;
1142 }
1143 skb_reserve(skb, 1);
1144 skb_put(skb, len - 4);
1145
27d7ff46 1146 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
a97a6f10 1147 IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __func__,
1da177e4
LT		 1148 len - 4, self->rx_buff.data);
1149
1150 // Move to next frame
1151 self->rx_buff.data += len;
af049081
SH		 1152 self->netdev->stats.rx_bytes += len;
1153 self->netdev->stats.rx_packets++;
1da177e4 1154 skb->dev = self->netdev;
459a98ed 1155 skb_reset_mac_header(skb);
1da177e4
LT		 1156 skb->protocol = htons(ETH_P_IRDA);
1157 netif_rx(skb);
1158
1159//F01_E
1160 } //FIR
1161 return TRUE;
1162
1163}
1164
1165/*
1166 * if frame is received , but no INT ,then use this routine to upload frame.
1167 */
1168static int upload_rxdata(struct via_ircc_cb *self, int iobase)
1169{
1170 struct sk_buff *skb;
1171 int len;
1172 struct st_fifo *st_fifo;
1173 st_fifo = &self->st_fifo;
1174
1175 len = GetRecvByte(iobase, self);
1176
a97a6f10 1177 IRDA_DEBUG(2, "%s(): len=%x\n", __func__, len);
1da177e4 1178
83e331e2 1179 if ((len - 4) < 2) {
af049081 1180 self->netdev->stats.rx_dropped++;
83e331e2
CS		 1181 return FALSE;
1182 }
1183
1da177e4 1184 skb = dev_alloc_skb(len + 1);
83e331e2 1185 if (skb == NULL) {
af049081 1186 self->netdev->stats.rx_dropped++;
1da177e4
LT		 1187 return FALSE;
1188 }
1189 skb_reserve(skb, 1);
1190 skb_put(skb, len - 4 + 1);
27d7ff46 1191 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
1da177e4
LT		 1192 st_fifo->tail++;
1193 st_fifo->len++;
1194 if (st_fifo->tail > MAX_RX_WINDOW)
1195 st_fifo->tail = 0;
1196 // Move to next frame
1197 self->rx_buff.data += len;
af049081
SH		 1198 self->netdev->stats.rx_bytes += len;
1199 self->netdev->stats.rx_packets++;
1da177e4 1200 skb->dev = self->netdev;
459a98ed 1201 skb_reset_mac_header(skb);
1da177e4
LT		 1202 skb->protocol = htons(ETH_P_IRDA);
1203 netif_rx(skb);
1204 if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
1205 RXStart(iobase, ON);
1206 } else {
1207 EnableRX(iobase, OFF);
1208 EnRXDMA(iobase, OFF);
1209 RXStart(iobase, OFF);
1210 }
1211 return TRUE;
1212}
1213
1214/*
1215 * Implement back to back receive , use this routine to upload data.
1216 */
1217
1218static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
1219{
1220 struct st_fifo *st_fifo;
1221 struct sk_buff *skb;
1222 int len;
1223 u8 status;
1224
1225 st_fifo = &self->st_fifo;
1226
1227 if (CkRxRecv(iobase, self)) {
1228 // if still receiving ,then return ,don't upload frame
1229 self->RetryCount = 0;
1230 SetTimer(iobase, 20);
1231 self->RxDataReady++;
1232 return FALSE;
1233 } else
1234 self->RetryCount++;
1235
1236 if ((self->RetryCount >= 1) ||
8e95a202
JP		 1237 ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize) ||
1238 (st_fifo->len >= (MAX_RX_WINDOW))) {
1da177e4
LT		 1239 while (st_fifo->len > 0) { //upload frame
1240 // Put this entry back in fifo
1241 if (st_fifo->head > MAX_RX_WINDOW)
1242 st_fifo->head = 0;
1243 status = st_fifo->entries[st_fifo->head].status;
1244 len = st_fifo->entries[st_fifo->head].len;
1245 st_fifo->head++;
1246 st_fifo->len--;
1247
1248 skb = dev_alloc_skb(len + 1 - 4);
1249 /*
1250 * if frame size, data ptr, or skb ptr are wrong,
1251 * then get next entry.
1252 */
8e95a202
JP		 1253 if ((skb == NULL) || (skb->data == NULL) ||
1254 (self->rx_buff.data == NULL) || (len < 6)) {
af049081 1255 self->netdev->stats.rx_dropped++;
1da177e4
LT		 1256 continue;
1257 }
1258 skb_reserve(skb, 1);
1259 skb_put(skb, len - 4);
27d7ff46 1260 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
1da177e4 1261
a97a6f10 1262 IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __func__,
1da177e4
LT		 1263 len - 4, st_fifo->head);
1264
1265 // Move to next frame
1266 self->rx_buff.data += len;
af049081
SH		 1267 self->netdev->stats.rx_bytes += len;
1268 self->netdev->stats.rx_packets++;
1da177e4 1269 skb->dev = self->netdev;
459a98ed 1270 skb_reset_mac_header(skb);
1da177e4
LT		 1271 skb->protocol = htons(ETH_P_IRDA);
1272 netif_rx(skb);
1273 } //while
1274 self->RetryCount = 0;
1275
1276 IRDA_DEBUG(2,
1277 "%s(): End of upload HostStatus=%x,RxStatus=%x\n",
a97a6f10 1278 __func__,
1da177e4
LT		 1279 GetHostStatus(iobase), GetRXStatus(iobase));
1280
1281 /*
1282 * if frame is receive complete at this routine ,then upload
1283 * frame.
1284 */
8e95a202
JP		 1285 if ((GetRXStatus(iobase) & 0x10) &&
1286 (RxCurCount(iobase, self) != self->RxLastCount)) {
1da177e4
LT		 1287 upload_rxdata(self, iobase);
1288 if (irda_device_txqueue_empty(self->netdev))
1289 via_ircc_dma_receive(self);
1290 }
1291 } // timer detect complete
1292 else
1293 SetTimer(iobase, 4);
1294 return TRUE;
1295
1296}
1297
1298
1299
1300/*
7d12e780 1301 * Function via_ircc_interrupt (irq, dev_id)
1da177e4
LT		 1302 *
1303 * An interrupt from the chip has arrived. Time to do some work
1304 *
1305 */
28fc1f5a 1306static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id)
1da177e4 1307{
28fc1f5a 1308 struct net_device *dev = dev_id;
4cf1653a 1309 struct via_ircc_cb *self = netdev_priv(dev);
1da177e4
LT		 1310 int iobase;
1311 u8 iHostIntType, iRxIntType, iTxIntType;
1312
1da177e4
LT		 1313 iobase = self->io.fir_base;
1314 spin_lock(&self->lock);
1315 iHostIntType = GetHostStatus(iobase);
1316
1317 IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n",
a97a6f10 1318 __func__, iHostIntType,
1da177e4
LT		 1319 (iHostIntType & 0x40) ? "Timer" : "",
1320 (iHostIntType & 0x20) ? "Tx" : "",
1321 (iHostIntType & 0x10) ? "Rx" : "",
1322 (iHostIntType & 0x0e) >> 1);
1323
1324 if ((iHostIntType & 0x40) != 0) { //Timer Event
1325 self->EventFlag.TimeOut++;
1326 ClearTimerInt(iobase, 1);
1327 if (self->io.direction == IO_XMIT) {
1328 via_ircc_dma_xmit(self, iobase);
1329 }
1330 if (self->io.direction == IO_RECV) {
1331 /*
1332 * frame ready hold too long, must reset.
1333 */
1334 if (self->RxDataReady > 30) {
1335 hwreset(self);
1336 if (irda_device_txqueue_empty(self->netdev)) {
1337 via_ircc_dma_receive(self);
1338 }
1339 } else { // call this to upload frame.
1340 RxTimerHandler(self, iobase);
1341 }
1342 } //RECV
1343 } //Timer Event
1344 if ((iHostIntType & 0x20) != 0) { //Tx Event
1345 iTxIntType = GetTXStatus(iobase);
1346
1347 IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n",
a97a6f10 1348 __func__, iTxIntType,
1da177e4
LT		 1349 (iTxIntType & 0x08) ? "FIFO underr." : "",
1350 (iTxIntType & 0x04) ? "EOM" : "",
1351 (iTxIntType & 0x02) ? "FIFO ready" : "",
1352 (iTxIntType & 0x01) ? "Early EOM" : "");
1353
1354 if (iTxIntType & 0x4) {
1355 self->EventFlag.EOMessage++; // read and will auto clean
1356 if (via_ircc_dma_xmit_complete(self)) {
1357 if (irda_device_txqueue_empty
1358 (self->netdev)) {
1359 via_ircc_dma_receive(self);
1360 }
1361 } else {
1362 self->EventFlag.Unknown++;
1363 }
1364 } //EOP
1365 } //Tx Event
1366 //----------------------------------------
1367 if ((iHostIntType & 0x10) != 0) { //Rx Event
1368 /* Check if DMA has finished */
1369 iRxIntType = GetRXStatus(iobase);
1370
1371 IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n",
a97a6f10 1372 __func__, iRxIntType,
1da177e4
LT		 1373 (iRxIntType & 0x80) ? "PHY err." : "",
1374 (iRxIntType & 0x40) ? "CRC err" : "",
1375 (iRxIntType & 0x20) ? "FIFO overr." : "",
1376 (iRxIntType & 0x10) ? "EOF" : "",
1377 (iRxIntType & 0x08) ? "RxData" : "",
1378 (iRxIntType & 0x02) ? "RxMaxLen" : "",
1379 (iRxIntType & 0x01) ? "SIR bad" : "");
1380 if (!iRxIntType)
a97a6f10 1381 IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __func__);
1da177e4
LT		 1382
1383 if (iRxIntType & 0x10) {
1384 if (via_ircc_dma_receive_complete(self, iobase)) {
1385//F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self);
1386 via_ircc_dma_receive(self);
1387 }
1388 } // No ERR
1389 else { //ERR
1390 IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
a97a6f10 1391 __func__, iRxIntType, iHostIntType,
1da177e4
LT		 1392 RxCurCount(iobase, self),
1393 self->RxLastCount);
1394
1395 if (iRxIntType & 0x20) { //FIFO OverRun ERR
1396 ResetChip(iobase, 0);
1397 ResetChip(iobase, 1);
1398 } else { //PHY,CRC ERR
1399
1400 if (iRxIntType != 0x08)
1401 hwreset(self); //F01
1402 }
1403 via_ircc_dma_receive(self);
1404 } //ERR
1405
1406 } //Rx Event
1407 spin_unlock(&self->lock);
1408 return IRQ_RETVAL(iHostIntType);
1409}
1410
1411static void hwreset(struct via_ircc_cb *self)
1412{
1413 int iobase;
1414 iobase = self->io.fir_base;
1415
a97a6f10 1416 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 1417
1418 ResetChip(iobase, 5);
1419 EnableDMA(iobase, OFF);
1420 EnableTX(iobase, OFF);
1421 EnableRX(iobase, OFF);
1422 EnRXDMA(iobase, OFF);
1423 EnTXDMA(iobase, OFF);
1424 RXStart(iobase, OFF);
1425 TXStart(iobase, OFF);
1426 InitCard(iobase);
1427 CommonInit(iobase);
1428 SIRFilter(iobase, ON);
1429 SetSIR(iobase, ON);
1430 CRC16(iobase, ON);
1431 EnTXCRC(iobase, 0);
1432 WriteReg(iobase, I_ST_CT_0, 0x00);
1433 SetBaudRate(iobase, 9600);
1434 SetPulseWidth(iobase, 12);
1435 SetSendPreambleCount(iobase, 0);
1436 WriteReg(iobase, I_ST_CT_0, 0x80);
1437
1438 /* Restore speed. */
1439 via_ircc_change_speed(self, self->io.speed);
1440
1441 self->st_fifo.len = 0;
1442}
1443
1444/*
1445 * Function via_ircc_is_receiving (self)
1446 *
1447 * Return TRUE is we are currently receiving a frame
1448 *
1449 */
1450static int via_ircc_is_receiving(struct via_ircc_cb *self)
1451{
1452 int status = FALSE;
1453 int iobase;
1454
1455 IRDA_ASSERT(self != NULL, return FALSE;);
1456
1457 iobase = self->io.fir_base;
1458 if (CkRxRecv(iobase, self))
1459 status = TRUE;
1460
a97a6f10 1461 IRDA_DEBUG(2, "%s(): status=%x....\n", __func__, status);
1da177e4
LT		 1462
1463 return status;
1464}
1465
1466
1467/*
1468 * Function via_ircc_net_open (dev)
1469 *
1470 * Start the device
1471 *
1472 */
1473static int via_ircc_net_open(struct net_device *dev)
1474{
1475 struct via_ircc_cb *self;
1476 int iobase;
1477 char hwname[32];
1478
a97a6f10 1479 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 1480
1481 IRDA_ASSERT(dev != NULL, return -1;);
4cf1653a 1482 self = netdev_priv(dev);
af049081 1483 dev->stats.rx_packets = 0;
1da177e4
LT		 1484 IRDA_ASSERT(self != NULL, return 0;);
1485 iobase = self->io.fir_base;
1486 if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
1487 IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
1488 self->io.irq);
1489 return -EAGAIN;
1490 }
1491 /*
1492 * Always allocate the DMA channel after the IRQ, and clean up on
1493 * failure.
1494 */
1495 if (request_dma(self->io.dma, dev->name)) {
1496 IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
1497 self->io.dma);
a997cbb3 1498 free_irq(self->io.irq, dev);
1da177e4
LT		 1499 return -EAGAIN;
1500 }
1501 if (self->io.dma2 != self->io.dma) {
1502 if (request_dma(self->io.dma2, dev->name)) {
1503 IRDA_WARNING("%s, unable to allocate dma2=%d\n",
1504 driver_name, self->io.dma2);
a997cbb3 1505 free_irq(self->io.irq, dev);
568b4933 1506 free_dma(self->io.dma);
1da177e4
LT		 1507 return -EAGAIN;
1508 }
1509 }
1510
1511
1512 /* turn on interrupts */
1513 EnAllInt(iobase, ON);
1514 EnInternalLoop(iobase, OFF);
1515 EnExternalLoop(iobase, OFF);
1516
1517 /* */
1518 via_ircc_dma_receive(self);
1519
1520 /* Ready to play! */
1521 netif_start_queue(dev);
1522
1523 /*
1524 * Open new IrLAP layer instance, now that everything should be
1525 * initialized properly
1526 */
1527 sprintf(hwname, "VIA @ 0x%x", iobase);
1528 self->irlap = irlap_open(dev, &self->qos, hwname);
1529
1530 self->RxLastCount = 0;
1531
1532 return 0;
1533}
1534
1535/*
1536 * Function via_ircc_net_close (dev)
1537 *
1538 * Stop the device
1539 *
1540 */
1541static int via_ircc_net_close(struct net_device *dev)
1542{
1543 struct via_ircc_cb *self;
1544 int iobase;
1545
a97a6f10 1546 IRDA_DEBUG(3, "%s()\n", __func__);
1da177e4
LT		 1547
1548 IRDA_ASSERT(dev != NULL, return -1;);
4cf1653a 1549 self = netdev_priv(dev);
1da177e4
LT		 1550 IRDA_ASSERT(self != NULL, return 0;);
1551
1552 /* Stop device */
1553 netif_stop_queue(dev);
1554 /* Stop and remove instance of IrLAP */
1555 if (self->irlap)
1556 irlap_close(self->irlap);
1557 self->irlap = NULL;
1558 iobase = self->io.fir_base;
1559 EnTXDMA(iobase, OFF);
1560 EnRXDMA(iobase, OFF);
1561 DisableDmaChannel(self->io.dma);
1562
1563 /* Disable interrupts */
1564 EnAllInt(iobase, OFF);
1565 free_irq(self->io.irq, dev);
1566 free_dma(self->io.dma);
568b4933
WC		 1567 if (self->io.dma2 != self->io.dma)
1568 free_dma(self->io.dma2);
1da177e4
LT		 1569
1570 return 0;
1571}
1572
1573/*
1574 * Function via_ircc_net_ioctl (dev, rq, cmd)
1575 *
1576 * Process IOCTL commands for this device
1577 *
1578 */
1579static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
1580 int cmd)
1581{
1582 struct if_irda_req *irq = (struct if_irda_req *) rq;
1583 struct via_ircc_cb *self;
1584 unsigned long flags;
1585 int ret = 0;
1586
1587 IRDA_ASSERT(dev != NULL, return -1;);
4cf1653a 1588 self = netdev_priv(dev);
1da177e4 1589 IRDA_ASSERT(self != NULL, return -1;);
a97a6f10 1590 IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name,
1da177e4
LT		 1591 cmd);
1592 /* Disable interrupts & save flags */
1593 spin_lock_irqsave(&self->lock, flags);
1594 switch (cmd) {
1595 case SIOCSBANDWIDTH: /* Set bandwidth */
1596 if (!capable(CAP_NET_ADMIN)) {
1597 ret = -EPERM;
1598 goto out;
1599 }
1600 via_ircc_change_speed(self, irq->ifr_baudrate);
1601 break;
1602 case SIOCSMEDIABUSY: /* Set media busy */
1603 if (!capable(CAP_NET_ADMIN)) {
1604 ret = -EPERM;
1605 goto out;
1606 }
1607 irda_device_set_media_busy(self->netdev, TRUE);
1608 break;
1609 case SIOCGRECEIVING: /* Check if we are receiving right now */
1610 irq->ifr_receiving = via_ircc_is_receiving(self);
1611 break;
1612 default:
1613 ret = -EOPNOTSUPP;
1614 }
1615 out:
1616 spin_unlock_irqrestore(&self->lock, flags);
1617 return ret;
1618}
1619
1da177e4
LT		 1620MODULE_AUTHOR("VIA Technologies,inc");
1621MODULE_DESCRIPTION("VIA IrDA Device Driver");
1622MODULE_LICENSE("GPL");
1623
1624module_init(via_ircc_init);
1625module_exit(via_ircc_cleanup);
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