via-ircc.c 41.9 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
/********************************************************************
 Filename:      via-ircc.c
 Version:       1.0 
 Description:   Driver for the VIA VT8231/VT8233 IrDA chipsets
 Author:        VIA Technologies,inc
 Date  :	08/06/2003

Copyright (c) 1998-2003 VIA Technologies, Inc.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
F02 Oct/28/02: Add SB device ID for 3147 and 3177.
 Comment :
       jul/09/2002 : only implement two kind of dongle currently.
       Oct/02/2002 : work on VT8231 and VT8233 .
       Aug/06/2003 : change driver format to pci driver .

2004-02-16: <sda@bdit.de>
- Removed unneeded 'legacy' pci stuff.
- Make sure SIR mode is set (hw_init()) before calling mode-dependant stuff.
- On speed change from core, don't send SIR frame with new speed. 
  Use current speed and change speeds later.
- Make module-param dongle_id actually work.
- New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only. 
  Tested with home-grown PCB on EPIA boards.
- Code cleanup.
       
 ********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>

#include <linux/pm.h>

#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>

#include "via-ircc.h"

#define VIA_MODULE_NAME "via-ircc"
#define CHIP_IO_EXTENT 0x40

static char *driver_name = VIA_MODULE_NAME;

/* Module parameters */
static int qos_mtt_bits = 0x07;	/* 1 ms or more */
static int dongle_id = 0;	/* default: probe */

/* We can't guess the type of connected dongle, user *must* supply it. */
module_param(dongle_id, int, 0);

/* FIXME : we should not need this, because instances should be automatically
 * managed by the PCI layer. Especially that we seem to only be using the
 * first entry. Jean II */
/* Max 4 instances for now */
static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };

/* Some prototypes */
static int via_ircc_open(int i, chipio_t * info, unsigned int id);
static int via_ircc_close(struct via_ircc_cb *self);
static int via_ircc_dma_receive(struct via_ircc_cb *self);
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
					 int iobase);
static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
				  struct net_device *dev);
static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
				  struct net_device *dev);
static void via_hw_init(struct via_ircc_cb *self);
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);
Linus Torvalds's avatar
Linus Torvalds committed
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
static int via_ircc_is_receiving(struct via_ircc_cb *self);
static int via_ircc_read_dongle_id(int iobase);

static int via_ircc_net_open(struct net_device *dev);
static int via_ircc_net_close(struct net_device *dev);
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
			      int cmd);
static struct net_device_stats *via_ircc_net_get_stats(struct net_device
						       *dev);
static void via_ircc_change_dongle_speed(int iobase, int speed,
					 int dongle_id);
static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
static void hwreset(struct via_ircc_cb *self);
static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
static int upload_rxdata(struct via_ircc_cb *self, int iobase);
static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id);
static void __devexit via_remove_one (struct pci_dev *pdev);

/* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
static void iodelay(int udelay)
{
	u8 data;
	int i;

	for (i = 0; i < udelay; i++) {
		data = inb(0x80);
	}
}

static struct pci_device_id via_pci_tbl[] = {
	{ PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
	{ PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
	{ PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
	{ PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
	{ PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
	{ 0, }
};

MODULE_DEVICE_TABLE(pci,via_pci_tbl);


static struct pci_driver via_driver = {
	.name		= VIA_MODULE_NAME,
	.id_table	= via_pci_tbl,
	.probe		= via_init_one,
	.remove		= __devexit_p(via_remove_one),
};


/*
 * Function via_ircc_init ()
 *
 *    Initialize chip. Just find out chip type and resource.
 */
static int __init via_ircc_init(void)
{
	int rc;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	rc = pci_register_driver(&via_driver);
	if (rc < 0) {
		IRDA_DEBUG(0, "%s(): error rc = %d, returning  -ENODEV...\n",
			   __FUNCTION__, rc);
		return -ENODEV;
	}
	return 0;
}

static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id)
{
	int rc;
        u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
	u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
	chipio_t info;

	IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __FUNCTION__, id->device);

	rc = pci_enable_device (pcidev);
	if (rc) {
		IRDA_DEBUG(0, "%s(): error rc = %d\n", __FUNCTION__, rc);
		return -ENODEV;
	}

	// South Bridge exist
        if ( ReadLPCReg(0x20) != 0x3C )
		Chipset=0x3096;
	else
		Chipset=0x3076;

	if (Chipset==0x3076) {
		IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __FUNCTION__);

		WriteLPCReg(7,0x0c );
		temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
		if((temp&0x01)==1) {   // BIOS close or no FIR
			WriteLPCReg(0x1d, 0x82 );
			WriteLPCReg(0x23,0x18);
			temp=ReadLPCReg(0xF0);
			if((temp&0x01)==0) {
				temp=(ReadLPCReg(0x74)&0x03);    //DMA
				FirDRQ0=temp + 4;
				temp=(ReadLPCReg(0x74)&0x0C) >> 2;
				FirDRQ1=temp + 4;
			} else {
				temp=(ReadLPCReg(0x74)&0x0C) >> 2;    //DMA
				FirDRQ0=temp + 4;
				FirDRQ1=FirDRQ0;
			}
			FirIRQ=(ReadLPCReg(0x70)&0x0f);		//IRQ
			FirIOBase=ReadLPCReg(0x60 ) << 8;	//IO Space :high byte
			FirIOBase=FirIOBase| ReadLPCReg(0x61) ;	//low byte
			FirIOBase=FirIOBase  ;
			info.fir_base=FirIOBase;
			info.irq=FirIRQ;
			info.dma=FirDRQ1;
			info.dma2=FirDRQ0;
			pci_read_config_byte(pcidev,0x40,&bTmp);
			pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
			pci_read_config_byte(pcidev,0x42,&bTmp);
			pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
			pci_write_config_byte(pcidev,0x5a,0xc0);
			WriteLPCReg(0x28, 0x70 );
			if (via_ircc_open(0, &info,0x3076) == 0)
				rc=0;
		} else
			rc = -ENODEV; //IR not turn on	 
	} else { //Not VT1211
		IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __FUNCTION__);

		pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
		if((bTmp&0x01)==1) {  // BIOS enable FIR
			//Enable Double DMA clock
			pci_read_config_byte(pcidev,0x42,&oldPCI_40);
			pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
			pci_read_config_byte(pcidev,0x40,&oldPCI_40);
			pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
			pci_read_config_byte(pcidev,0x44,&oldPCI_44);
			pci_write_config_byte(pcidev,0x44,0x4e);
  //---------- read configuration from Function0 of south bridge
			if((bTmp&0x02)==0) {
				pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
				FirDRQ0 = (bTmp1 & 0x30) >> 4;
				pci_read_config_byte(pcidev,0x44,&bTmp1);
				FirDRQ1 = (bTmp1 & 0xc0) >> 6;
			} else  {
				pci_read_config_byte(pcidev,0x44,&bTmp1);    //DMA
				FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
				FirDRQ1=0;
			}
			pci_read_config_byte(pcidev,0x47,&bTmp1);  //IRQ
			FirIRQ = bTmp1 & 0x0f;

			pci_read_config_byte(pcidev,0x69,&bTmp);
			FirIOBase = bTmp << 8;//hight byte
			pci_read_config_byte(pcidev,0x68,&bTmp);
			FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
  //-------------------------
			info.fir_base=FirIOBase;
			info.irq=FirIRQ;
			info.dma=FirDRQ1;
			info.dma2=FirDRQ0;
			if (via_ircc_open(0, &info,0x3096) == 0)
				rc=0;
		} else
			rc = -ENODEV; //IR not turn on !!!!!
	}//Not VT1211

	IRDA_DEBUG(2, "%s(): End - rc = %d\n", __FUNCTION__, rc);
	return rc;
}

/*
 * Function via_ircc_clean ()
 *
 *    Close all configured chips
 *
 */
static void via_ircc_clean(void)
{
	int i;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

281
	for (i=0; i < ARRAY_SIZE(dev_self); i++) {
Linus Torvalds's avatar
Linus Torvalds committed
282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328
		if (dev_self[i])
			via_ircc_close(dev_self[i]);
	}
}

static void __devexit via_remove_one (struct pci_dev *pdev)
{
	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	/* FIXME : This is ugly. We should use pci_get_drvdata(pdev);
	 * to get our driver instance and call directly via_ircc_close().
	 * See vlsi_ir for details...
	 * Jean II */
	via_ircc_clean();

	/* FIXME : This should be in via_ircc_close(), because here we may
	 * theoritically disable still configured devices :-( - Jean II */
	pci_disable_device(pdev);
}

static void __exit via_ircc_cleanup(void)
{
	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	/* FIXME : This should be redundant, as pci_unregister_driver()
	 * should call via_remove_one() on each device.
	 * Jean II */
	via_ircc_clean();

	/* Cleanup all instances of the driver */
	pci_unregister_driver (&via_driver); 
}

/*
 * Function via_ircc_open (iobase, irq)
 *
 *    Open driver instance
 *
 */
static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
{
	struct net_device *dev;
	struct via_ircc_cb *self;
	int err;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

329 330 331
	if (i >= ARRAY_SIZE(dev_self))
		return -ENOMEM;

Linus Torvalds's avatar
Linus Torvalds committed
332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924
	/* Allocate new instance of the driver */
	dev = alloc_irdadev(sizeof(struct via_ircc_cb));
	if (dev == NULL) 
		return -ENOMEM;

	self = dev->priv;
	self->netdev = dev;
	spin_lock_init(&self->lock);

	/* FIXME : We should store our driver instance in the PCI layer,
	 * using pci_set_drvdata(), not in this array.
	 * See vlsi_ir for details... - Jean II */
	/* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */
	/* Need to store self somewhere */
	dev_self[i] = self;
	self->index = i;
	/* Initialize Resource */
	self->io.cfg_base = info->cfg_base;
	self->io.fir_base = info->fir_base;
	self->io.irq = info->irq;
	self->io.fir_ext = CHIP_IO_EXTENT;
	self->io.dma = info->dma;
	self->io.dma2 = info->dma2;
	self->io.fifo_size = 32;
	self->chip_id = id;
	self->st_fifo.len = 0;
	self->RxDataReady = 0;

	/* Reserve the ioports that we need */
	if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
		IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
			   __FUNCTION__, self->io.fir_base);
		err = -ENODEV;
		goto err_out1;
	}
	
	/* Initialize QoS for this device */
	irda_init_max_qos_capabilies(&self->qos);

	/* Check if user has supplied the dongle id or not */
	if (!dongle_id)
		dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
	self->io.dongle_id = dongle_id;

	/* The only value we must override it the baudrate */
	/* Maximum speeds and capabilities are dongle-dependant. */
	switch( self->io.dongle_id ){
	case 0x0d:
		self->qos.baud_rate.bits =
		    IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
		    IR_576000 | IR_1152000 | (IR_4000000 << 8);
		break;
	default:
		self->qos.baud_rate.bits =
		    IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
		break;
	}

	/* Following was used for testing:
	 *
	 *   self->qos.baud_rate.bits = IR_9600;
	 *
	 * Is is no good, as it prohibits (error-prone) speed-changes.
	 */

	self->qos.min_turn_time.bits = qos_mtt_bits;
	irda_qos_bits_to_value(&self->qos);

	/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
	self->rx_buff.truesize = 14384 + 2048;
	self->tx_buff.truesize = 14384 + 2048;

	/* Allocate memory if needed */
	self->rx_buff.head =
		dma_alloc_coherent(NULL, self->rx_buff.truesize,
				   &self->rx_buff_dma, GFP_KERNEL);
	if (self->rx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out2;
	}
	memset(self->rx_buff.head, 0, self->rx_buff.truesize);

	self->tx_buff.head =
		dma_alloc_coherent(NULL, self->tx_buff.truesize,
				   &self->tx_buff_dma, GFP_KERNEL);
	if (self->tx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out3;
	}
	memset(self->tx_buff.head, 0, self->tx_buff.truesize);

	self->rx_buff.in_frame = FALSE;
	self->rx_buff.state = OUTSIDE_FRAME;
	self->tx_buff.data = self->tx_buff.head;
	self->rx_buff.data = self->rx_buff.head;

	/* Reset Tx queue info */
	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
	self->tx_fifo.tail = self->tx_buff.head;

	/* Override the network functions we need to use */
	dev->hard_start_xmit = via_ircc_hard_xmit_sir;
	dev->open = via_ircc_net_open;
	dev->stop = via_ircc_net_close;
	dev->do_ioctl = via_ircc_net_ioctl;
	dev->get_stats = via_ircc_net_get_stats;

	err = register_netdev(dev);
	if (err)
		goto err_out4;

	IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);

	/* Initialise the hardware..
	*/
	self->io.speed = 9600;
	via_hw_init(self);
	return 0;
 err_out4:
	dma_free_coherent(NULL, self->tx_buff.truesize,
			  self->tx_buff.head, self->tx_buff_dma);
 err_out3:
	dma_free_coherent(NULL, self->rx_buff.truesize,
			  self->rx_buff.head, self->rx_buff_dma);
 err_out2:
	release_region(self->io.fir_base, self->io.fir_ext);
 err_out1:
	free_netdev(dev);
	dev_self[i] = NULL;
	return err;
}

/*
 * Function via_ircc_close (self)
 *
 *    Close driver instance
 *
 */
static int via_ircc_close(struct via_ircc_cb *self)
{
	int iobase;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(self != NULL, return -1;);

	iobase = self->io.fir_base;

	ResetChip(iobase, 5);	//hardware reset.
	/* Remove netdevice */
	unregister_netdev(self->netdev);

	/* Release the PORT that this driver is using */
	IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
		   __FUNCTION__, self->io.fir_base);
	release_region(self->io.fir_base, self->io.fir_ext);
	if (self->tx_buff.head)
		dma_free_coherent(NULL, self->tx_buff.truesize,
				  self->tx_buff.head, self->tx_buff_dma);
	if (self->rx_buff.head)
		dma_free_coherent(NULL, self->rx_buff.truesize,
				  self->rx_buff.head, self->rx_buff_dma);
	dev_self[self->index] = NULL;

	free_netdev(self->netdev);

	return 0;
}

/*
 * Function via_hw_init(self)
 *
 *    Returns non-negative on success.
 *
 * Formerly via_ircc_setup 
 */
static void via_hw_init(struct via_ircc_cb *self)
{
	int iobase = self->io.fir_base;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	SetMaxRxPacketSize(iobase, 0x0fff);	//set to max:4095
	// FIFO Init
	EnRXFIFOReadyInt(iobase, OFF);
	EnRXFIFOHalfLevelInt(iobase, OFF);
	EnTXFIFOHalfLevelInt(iobase, OFF);
	EnTXFIFOUnderrunEOMInt(iobase, ON);
	EnTXFIFOReadyInt(iobase, OFF);
	InvertTX(iobase, OFF);
	InvertRX(iobase, OFF);

	if (ReadLPCReg(0x20) == 0x3c)
		WriteLPCReg(0xF0, 0);	// for VT1211
	/* Int Init */
	EnRXSpecInt(iobase, ON);

	/* The following is basically hwreset */
	/* If this is the case, why not just call hwreset() ? Jean II */
	ResetChip(iobase, 5);
	EnableDMA(iobase, OFF);
	EnableTX(iobase, OFF);
	EnableRX(iobase, OFF);
	EnRXDMA(iobase, OFF);
	EnTXDMA(iobase, OFF);
	RXStart(iobase, OFF);
	TXStart(iobase, OFF);
	InitCard(iobase);
	CommonInit(iobase);
	SIRFilter(iobase, ON);
	SetSIR(iobase, ON);
	CRC16(iobase, ON);
	EnTXCRC(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x00);
	SetBaudRate(iobase, 9600);
	SetPulseWidth(iobase, 12);
	SetSendPreambleCount(iobase, 0);

	self->io.speed = 9600;
	self->st_fifo.len = 0;

	via_ircc_change_dongle_speed(iobase, self->io.speed,
				     self->io.dongle_id);

	WriteReg(iobase, I_ST_CT_0, 0x80);
}

/*
 * Function via_ircc_read_dongle_id (void)
 *
 */
static int via_ircc_read_dongle_id(int iobase)
{
	int dongle_id = 9;	/* Default to IBM */

	IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
	return dongle_id;
}

/*
 * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
 *    Change speed of the attach dongle
 *    only implement two type of dongle currently.
 */
static void via_ircc_change_dongle_speed(int iobase, int speed,
					 int dongle_id)
{
	u8 mode = 0;

	/* speed is unused, as we use IsSIROn()/IsMIROn() */
	speed = speed;

	IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
		   __FUNCTION__, speed, iobase, dongle_id);

	switch (dongle_id) {

		/* Note: The dongle_id's listed here are derived from
		 * nsc-ircc.c */ 

	case 0x08:		/* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
		UseOneRX(iobase, ON);	// use one RX pin   RX1,RX2
		InvertTX(iobase, OFF);
		InvertRX(iobase, OFF);

		EnRX2(iobase, ON);	//sir to rx2
		EnGPIOtoRX2(iobase, OFF);

		if (IsSIROn(iobase)) {	//sir
			// Mode select Off
			SlowIRRXLowActive(iobase, ON);
			udelay(1000);
			SlowIRRXLowActive(iobase, OFF);
		} else {
			if (IsMIROn(iobase)) {	//mir
				// Mode select On
				SlowIRRXLowActive(iobase, OFF);
				udelay(20);
			} else {	// fir
				if (IsFIROn(iobase)) {	//fir
					// Mode select On
					SlowIRRXLowActive(iobase, OFF);
					udelay(20);
				}
			}
		}
		break;

	case 0x09:		/* IBM31T1100 or Temic TFDS6000/TFDS6500 */
		UseOneRX(iobase, ON);	//use ONE RX....RX1
		InvertTX(iobase, OFF);
		InvertRX(iobase, OFF);	// invert RX pin

		EnRX2(iobase, ON);
		EnGPIOtoRX2(iobase, OFF);
		if (IsSIROn(iobase)) {	//sir
			// Mode select On
			SlowIRRXLowActive(iobase, ON);
			udelay(20);
			// Mode select Off
			SlowIRRXLowActive(iobase, OFF);
		}
		if (IsMIROn(iobase)) {	//mir
			// Mode select On
			SlowIRRXLowActive(iobase, OFF);
			udelay(20);
			// Mode select Off
			SlowIRRXLowActive(iobase, ON);
		} else {	// fir
			if (IsFIROn(iobase)) {	//fir
				// Mode select On
				SlowIRRXLowActive(iobase, OFF);
				// TX On
				WriteTX(iobase, ON);
				udelay(20);
				// Mode select OFF
				SlowIRRXLowActive(iobase, ON);
				udelay(20);
				// TX Off
				WriteTX(iobase, OFF);
			}
		}
		break;

	case 0x0d:
		UseOneRX(iobase, OFF);	// use two RX pin   RX1,RX2
		InvertTX(iobase, OFF);
		InvertRX(iobase, OFF);
		SlowIRRXLowActive(iobase, OFF);
		if (IsSIROn(iobase)) {	//sir
			EnGPIOtoRX2(iobase, OFF);
			WriteGIO(iobase, OFF);
			EnRX2(iobase, OFF);	//sir to rx2
		} else {	// fir mir
			EnGPIOtoRX2(iobase, OFF);
			WriteGIO(iobase, OFF);
			EnRX2(iobase, OFF);	//fir to rx
		}
		break;

	case 0x11:		/* Temic TFDS4500 */

		IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __FUNCTION__);

		UseOneRX(iobase, ON);	//use ONE RX....RX1
		InvertTX(iobase, OFF);
		InvertRX(iobase, ON);	// invert RX pin
	
		EnRX2(iobase, ON);	//sir to rx2
		EnGPIOtoRX2(iobase, OFF);

		if( IsSIROn(iobase) ){	//sir

			// Mode select On
			SlowIRRXLowActive(iobase, ON);
			udelay(20);
			// Mode select Off
			SlowIRRXLowActive(iobase, OFF);

		} else{
			IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __FUNCTION__);
		}
		break;

	case 0x0ff:		/* Vishay */
		if (IsSIROn(iobase))
			mode = 0;
		else if (IsMIROn(iobase))
			mode = 1;
		else if (IsFIROn(iobase))
			mode = 2;
		else if (IsVFIROn(iobase))
			mode = 5;	//VFIR-16
		SI_SetMode(iobase, mode);
		break;

	default:
		IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
			   __FUNCTION__, dongle_id);
	}
}

/*
 * Function via_ircc_change_speed (self, baud)
 *
 *    Change the speed of the device
 *
 */
static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
{
	struct net_device *dev = self->netdev;
	u16 iobase;
	u8 value = 0, bTmp;

	iobase = self->io.fir_base;
	/* Update accounting for new speed */
	self->io.speed = speed;
	IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __FUNCTION__, speed);

	WriteReg(iobase, I_ST_CT_0, 0x0);

	/* Controller mode sellection */
	switch (speed) {
	case 2400:
	case 9600:
	case 19200:
	case 38400:
	case 57600:
	case 115200:
		value = (115200/speed)-1;
		SetSIR(iobase, ON);
		CRC16(iobase, ON);
		break;
	case 576000:
		/* FIXME: this can't be right, as it's the same as 115200,
		 * and 576000 is MIR, not SIR. */
		value = 0;
		SetSIR(iobase, ON);
		CRC16(iobase, ON);
		break;
	case 1152000:
		value = 0;
		SetMIR(iobase, ON);
		/* FIXME: CRC ??? */
		break;
	case 4000000:
		value = 0;
		SetFIR(iobase, ON);
		SetPulseWidth(iobase, 0);
		SetSendPreambleCount(iobase, 14);
		CRC16(iobase, OFF);
		EnTXCRC(iobase, ON);
		break;
	case 16000000:
		value = 0;
		SetVFIR(iobase, ON);
		/* FIXME: CRC ??? */
		break;
	default:
		value = 0;
		break;
	}

	/* Set baudrate to 0x19[2..7] */
	bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
	bTmp |= value << 2;
	WriteReg(iobase, I_CF_H_1, bTmp);

	/* Some dongles may need to be informed about speed changes. */
	via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);

	/* Set FIFO size to 64 */
	SetFIFO(iobase, 64);

	/* Enable IR */
	WriteReg(iobase, I_ST_CT_0, 0x80);

	// EnTXFIFOHalfLevelInt(iobase,ON);

	/* Enable some interrupts so we can receive frames */
	//EnAllInt(iobase,ON);

	if (IsSIROn(iobase)) {
		SIRFilter(iobase, ON);
		SIRRecvAny(iobase, ON);
	} else {
		SIRFilter(iobase, OFF);
		SIRRecvAny(iobase, OFF);
	}

	if (speed > 115200) {
		/* Install FIR xmit handler */
		dev->hard_start_xmit = via_ircc_hard_xmit_fir;
		via_ircc_dma_receive(self);
	} else {
		/* Install SIR xmit handler */
		dev->hard_start_xmit = via_ircc_hard_xmit_sir;
	}
	netif_wake_queue(dev);
}

/*
 * Function via_ircc_hard_xmit (skb, dev)
 *
 *    Transmit the frame!
 *
 */
static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
				  struct net_device *dev)
{
	struct via_ircc_cb *self;
	unsigned long flags;
	u16 iobase;
	__u32 speed;

	self = (struct via_ircc_cb *) dev->priv;
	IRDA_ASSERT(self != NULL, return 0;);
	iobase = self->io.fir_base;

	netif_stop_queue(dev);
	/* Check if we need to change the speed */
	speed = irda_get_next_speed(skb);
	if ((speed != self->io.speed) && (speed != -1)) {
		/* Check for empty frame */
		if (!skb->len) {
			via_ircc_change_speed(self, speed);
			dev->trans_start = jiffies;
			dev_kfree_skb(skb);
			return 0;
		} else
			self->new_speed = speed;
	}
	InitCard(iobase);
	CommonInit(iobase);
	SIRFilter(iobase, ON);
	SetSIR(iobase, ON);
	CRC16(iobase, ON);
	EnTXCRC(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x00);

	spin_lock_irqsave(&self->lock, flags);
	self->tx_buff.data = self->tx_buff.head;
	self->tx_buff.len =
	    async_wrap_skb(skb, self->tx_buff.data,
			   self->tx_buff.truesize);

	self->stats.tx_bytes += self->tx_buff.len;
	/* Send this frame with old speed */
	SetBaudRate(iobase, self->io.speed);
	SetPulseWidth(iobase, 12);
	SetSendPreambleCount(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x80);

	EnableTX(iobase, ON);
	EnableRX(iobase, OFF);

	ResetChip(iobase, 0);
	ResetChip(iobase, 1);
	ResetChip(iobase, 2);
	ResetChip(iobase, 3);
	ResetChip(iobase, 4);

	EnAllInt(iobase, ON);
	EnTXDMA(iobase, ON);
	EnRXDMA(iobase, OFF);

	irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
		       DMA_TX_MODE);

	SetSendByte(iobase, self->tx_buff.len);
	RXStart(iobase, OFF);
	TXStart(iobase, ON);

	dev->trans_start = jiffies;
	spin_unlock_irqrestore(&self->lock, flags);
	dev_kfree_skb(skb);
	return 0;
}

static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
				  struct net_device *dev)
{
	struct via_ircc_cb *self;
	u16 iobase;
	__u32 speed;
	unsigned long flags;

	self = (struct via_ircc_cb *) dev->priv;
	iobase = self->io.fir_base;

	if (self->st_fifo.len)
		return 0;
	if (self->chip_id == 0x3076)
		iodelay(1500);
	else
		udelay(1500);
	netif_stop_queue(dev);
	speed = irda_get_next_speed(skb);
	if ((speed != self->io.speed) && (speed != -1)) {
		if (!skb->len) {
			via_ircc_change_speed(self, speed);
			dev->trans_start = jiffies;
			dev_kfree_skb(skb);
			return 0;
		} else
			self->new_speed = speed;
	}
	spin_lock_irqsave(&self->lock, flags);
	self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
	self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;

	self->tx_fifo.tail += skb->len;
	self->stats.tx_bytes += skb->len;
925 926
	skb_copy_from_linear_data(skb,
		      self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
Linus Torvalds's avatar
Linus Torvalds committed
927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
	self->tx_fifo.len++;
	self->tx_fifo.free++;
//F01   if (self->tx_fifo.len == 1) {
	via_ircc_dma_xmit(self, iobase);
//F01   }
//F01   if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
	dev->trans_start = jiffies;
	dev_kfree_skb(skb);
	spin_unlock_irqrestore(&self->lock, flags);
	return 0;

}

static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
{
	EnTXDMA(iobase, OFF);
	self->io.direction = IO_XMIT;
	EnPhys(iobase, ON);
	EnableTX(iobase, ON);
	EnableRX(iobase, OFF);
	ResetChip(iobase, 0);
	ResetChip(iobase, 1);
	ResetChip(iobase, 2);
	ResetChip(iobase, 3);
	ResetChip(iobase, 4);
	EnAllInt(iobase, ON);
	EnTXDMA(iobase, ON);
	EnRXDMA(iobase, OFF);
	irda_setup_dma(self->io.dma,
		       ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
			self->tx_buff.head) + self->tx_buff_dma,
		       self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
	IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
		   __FUNCTION__, self->tx_fifo.ptr,
		   self->tx_fifo.queue[self->tx_fifo.ptr].len,
		   self->tx_fifo.len);

	SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
	RXStart(iobase, OFF);
	TXStart(iobase, ON);
	return 0;

}

/*
 * Function via_ircc_dma_xmit_complete (self)
 *
 *    The transfer of a frame in finished. This function will only be called 
 *    by the interrupt handler
 *
 */
static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
{
	int iobase;
	int ret = TRUE;
	u8 Tx_status;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	iobase = self->io.fir_base;
	/* Disable DMA */
//      DisableDmaChannel(self->io.dma);
	/* Check for underrrun! */
	/* Clear bit, by writing 1 into it */
	Tx_status = GetTXStatus(iobase);
	if (Tx_status & 0x08) {
		self->stats.tx_errors++;
		self->stats.tx_fifo_errors++;
		hwreset(self);
// how to clear underrrun ?
	} else {
		self->stats.tx_packets++;
		ResetChip(iobase, 3);
		ResetChip(iobase, 4);
	}
	/* Check if we need to change the speed */
	if (self->new_speed) {
		via_ircc_change_speed(self, self->new_speed);
		self->new_speed = 0;
	}

	/* Finished with this frame, so prepare for next */
	if (IsFIROn(iobase)) {
		if (self->tx_fifo.len) {
			self->tx_fifo.len--;
			self->tx_fifo.ptr++;
		}
	}
	IRDA_DEBUG(1,
		   "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
		   __FUNCTION__,
		   self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
/* F01_S
	// Any frames to be sent back-to-back? 
	if (self->tx_fifo.len) {
		// Not finished yet! 
	  	via_ircc_dma_xmit(self, iobase);
		ret = FALSE;
	} else { 
F01_E*/
	// Reset Tx FIFO info 
	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
	self->tx_fifo.tail = self->tx_buff.head;
//F01   }

	// Make sure we have room for more frames 
//F01   if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
	// Not busy transmitting anymore 
	// Tell the network layer, that we can accept more frames 
	netif_wake_queue(self->netdev);
//F01   }
	return ret;
}

/*
 * Function via_ircc_dma_receive (self)
 *
 *    Set configuration for receive a frame.
 *
 */
static int via_ircc_dma_receive(struct via_ircc_cb *self)
{
	int iobase;

	iobase = self->io.fir_base;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
	self->tx_fifo.tail = self->tx_buff.head;
	self->RxDataReady = 0;
	self->io.direction = IO_RECV;
	self->rx_buff.data = self->rx_buff.head;
	self->st_fifo.len = self->st_fifo.pending_bytes = 0;
	self->st_fifo.tail = self->st_fifo.head = 0;

	EnPhys(iobase, ON);
	EnableTX(iobase, OFF);
	EnableRX(iobase, ON);

	ResetChip(iobase, 0);
	ResetChip(iobase, 1);
	ResetChip(iobase, 2);
	ResetChip(iobase, 3);
	ResetChip(iobase, 4);

	EnAllInt(iobase, ON);
	EnTXDMA(iobase, OFF);
	EnRXDMA(iobase, ON);
	irda_setup_dma(self->io.dma2, self->rx_buff_dma,
		  self->rx_buff.truesize, DMA_RX_MODE);
	TXStart(iobase, OFF);
	RXStart(iobase, ON);

	return 0;
}

/*
 * Function via_ircc_dma_receive_complete (self)
 *
 *    Controller Finished with receiving frames,
 *    and this routine is call by ISR
 *    
 */
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
					 int iobase)
{
	struct st_fifo *st_fifo;
	struct sk_buff *skb;
	int len, i;
	u8 status = 0;

	iobase = self->io.fir_base;
	st_fifo = &self->st_fifo;

	if (self->io.speed < 4000000) {	//Speed below FIR
		len = GetRecvByte(iobase, self);
		skb = dev_alloc_skb(len + 1);
		if (skb == NULL)
			return FALSE;
		// Make sure IP header gets aligned 
		skb_reserve(skb, 1);
		skb_put(skb, len - 2);
		if (self->chip_id == 0x3076) {
			for (i = 0; i < len - 2; i++)
				skb->data[i] = self->rx_buff.data[i * 2];
		} else {
			if (self->chip_id == 0x3096) {
				for (i = 0; i < len - 2; i++)
					skb->data[i] =
					    self->rx_buff.data[i];
			}
		}
		// Move to next frame 
		self->rx_buff.data += len;
		self->stats.rx_bytes += len;
		self->stats.rx_packets++;
		skb->dev = self->netdev;
1125
		skb_reset_mac_header(skb);
Linus Torvalds's avatar
Linus Torvalds committed
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
		skb->protocol = htons(ETH_P_IRDA);
		netif_rx(skb);
		return TRUE;
	}

	else {			//FIR mode
		len = GetRecvByte(iobase, self);
		if (len == 0)
			return TRUE;	//interrupt only, data maybe move by RxT  
		if (((len - 4) < 2) || ((len - 4) > 2048)) {
			IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
				   __FUNCTION__, len, RxCurCount(iobase, self),
				   self->RxLastCount);
			hwreset(self);
			return FALSE;
		}
		IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
			   __FUNCTION__,
			   st_fifo->len, len - 4, RxCurCount(iobase, self));

		st_fifo->entries[st_fifo->tail].status = status;
		st_fifo->entries[st_fifo->tail].len = len;
		st_fifo->pending_bytes += len;
		st_fifo->tail++;
		st_fifo->len++;
		if (st_fifo->tail > MAX_RX_WINDOW)
			st_fifo->tail = 0;
		self->RxDataReady = 0;

		// It maybe have MAX_RX_WINDOW package receive by
		// receive_complete before Timer IRQ
/* F01_S
          if (st_fifo->len < (MAX_RX_WINDOW+2 )) { 
		  RXStart(iobase,ON);
	  	  SetTimer(iobase,4);
	  }
	  else	  { 
F01_E */
		EnableRX(iobase, OFF);
		EnRXDMA(iobase, OFF);
		RXStart(iobase, OFF);
//F01_S
		// Put this entry back in fifo 
		if (st_fifo->head > MAX_RX_WINDOW)
			st_fifo->head = 0;
		status = st_fifo->entries[st_fifo->head].status;
		len = st_fifo->entries[st_fifo->head].len;
		st_fifo->head++;
		st_fifo->len--;

		skb = dev_alloc_skb(len + 1 - 4);
		/*
		 * if frame size,data ptr,or skb ptr are wrong ,the get next
		 * entry.
		 */
		if ((skb == NULL) || (skb->data == NULL)
		    || (self->rx_buff.data == NULL) || (len < 6)) {
			self->stats.rx_dropped++;
			return TRUE;
		}
		skb_reserve(skb, 1);
		skb_put(skb, len - 4);

1189
		skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
Linus Torvalds's avatar
Linus Torvalds committed
1190 1191 1192 1193 1194 1195 1196 1197
		IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __FUNCTION__,
			   len - 4, self->rx_buff.data);

		// Move to next frame 
		self->rx_buff.data += len;
		self->stats.rx_bytes += len;
		self->stats.rx_packets++;
		skb->dev = self->netdev;
1198
		skb_reset_mac_header(skb);
Linus Torvalds's avatar
Linus Torvalds committed
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221
		skb->protocol = htons(ETH_P_IRDA);
		netif_rx(skb);

//F01_E
	}			//FIR
	return TRUE;

}

/*
 * if frame is received , but no INT ,then use this routine to upload frame.
 */
static int upload_rxdata(struct via_ircc_cb *self, int iobase)
{
	struct sk_buff *skb;
	int len;
	struct st_fifo *st_fifo;
	st_fifo = &self->st_fifo;

	len = GetRecvByte(iobase, self);

	IRDA_DEBUG(2, "%s(): len=%x\n", __FUNCTION__, len);

Chuck Short's avatar
Chuck Short committed
1222 1223 1224 1225 1226
	if ((len - 4) < 2) {
		self->stats.rx_dropped++;
		return FALSE;
	}

Linus Torvalds's avatar
Linus Torvalds committed
1227
	skb = dev_alloc_skb(len + 1);
Chuck Short's avatar
Chuck Short committed
1228
	if (skb == NULL) {
Linus Torvalds's avatar
Linus Torvalds committed
1229 1230 1231 1232 1233
		self->stats.rx_dropped++;
		return FALSE;
	}
	skb_reserve(skb, 1);
	skb_put(skb, len - 4 + 1);
1234
	skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
Linus Torvalds's avatar
Linus Torvalds committed
1235 1236 1237 1238 1239 1240 1241 1242 1243
	st_fifo->tail++;
	st_fifo->len++;
	if (st_fifo->tail > MAX_RX_WINDOW)
		st_fifo->tail = 0;
	// Move to next frame 
	self->rx_buff.data += len;
	self->stats.rx_bytes += len;
	self->stats.rx_packets++;
	skb->dev = self->netdev;
1244
	skb_reset_mac_header(skb);
Linus Torvalds's avatar
Linus Torvalds committed
1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
	skb->protocol = htons(ETH_P_IRDA);
	netif_rx(skb);
	if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
		RXStart(iobase, ON);
	} else {
		EnableRX(iobase, OFF);
		EnRXDMA(iobase, OFF);
		RXStart(iobase, OFF);
	}
	return TRUE;
}

/*
 * Implement back to back receive , use this routine to upload data.
 */

static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
{
	struct st_fifo *st_fifo;
	struct sk_buff *skb;
	int len;
	u8 status;

	st_fifo = &self->st_fifo;

	if (CkRxRecv(iobase, self)) {
		// if still receiving ,then return ,don't upload frame 
		self->RetryCount = 0;
		SetTimer(iobase, 20);
		self->RxDataReady++;
		return FALSE;
	} else
		self->RetryCount++;

	if ((self->RetryCount >= 1) ||
	    ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize)
	    || (st_fifo->len >= (MAX_RX_WINDOW))) {
		while (st_fifo->len > 0) {	//upload frame
			// Put this entry back in fifo 
			if (st_fifo->head > MAX_RX_WINDOW)
				st_fifo->head = 0;
			status = st_fifo->entries[st_fifo->head].status;
			len = st_fifo->entries[st_fifo->head].len;
			st_fifo->head++;
			st_fifo->len--;

			skb = dev_alloc_skb(len + 1 - 4);
			/*
			 * if frame size, data ptr, or skb ptr are wrong,
			 * then get next entry.
			 */
			if ((skb == NULL) || (skb->data == NULL)
			    || (self->rx_buff.data == NULL) || (len < 6)) {
				self->stats.rx_dropped++;
				continue;
			}
			skb_reserve(skb, 1);
			skb_put(skb, len - 4);
1303
			skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
Linus Torvalds's avatar
Linus Torvalds committed
1304 1305 1306 1307 1308 1309 1310 1311 1312

			IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __FUNCTION__,
				   len - 4, st_fifo->head);

			// Move to next frame 
			self->rx_buff.data += len;
			self->stats.rx_bytes += len;
			self->stats.rx_packets++;
			skb->dev = self->netdev;
1313
			skb_reset_mac_header(skb);
Linus Torvalds's avatar
Linus Torvalds committed
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343
			skb->protocol = htons(ETH_P_IRDA);
			netif_rx(skb);
		}		//while
		self->RetryCount = 0;

		IRDA_DEBUG(2,
			   "%s(): End of upload HostStatus=%x,RxStatus=%x\n",
			   __FUNCTION__,
			   GetHostStatus(iobase), GetRXStatus(iobase));

		/*
		 * if frame is receive complete at this routine ,then upload
		 * frame.
		 */
		if ((GetRXStatus(iobase) & 0x10)
		    && (RxCurCount(iobase, self) != self->RxLastCount)) {
			upload_rxdata(self, iobase);
			if (irda_device_txqueue_empty(self->netdev))
				via_ircc_dma_receive(self);
		}
	}			// timer detect complete
	else
		SetTimer(iobase, 4);
	return TRUE;

}



/*
1344
 * Function via_ircc_interrupt (irq, dev_id)
Linus Torvalds's avatar
Linus Torvalds committed
1345 1346 1347 1348
 *
 *    An interrupt from the chip has arrived. Time to do some work
 *
 */
1349
static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id)
Linus Torvalds's avatar
Linus Torvalds committed
1350
{
1351 1352
	struct net_device *dev = dev_id;
	struct via_ircc_cb *self = dev->priv;
Linus Torvalds's avatar
Linus Torvalds committed
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
	int iobase;
	u8 iHostIntType, iRxIntType, iTxIntType;

	iobase = self->io.fir_base;
	spin_lock(&self->lock);
	iHostIntType = GetHostStatus(iobase);

	IRDA_DEBUG(4, "%s(): iHostIntType %02x:  %s %s %s  %02x\n",
		   __FUNCTION__, iHostIntType,
		   (iHostIntType & 0x40) ? "Timer" : "",
		   (iHostIntType & 0x20) ? "Tx" : "",
		   (iHostIntType & 0x10) ? "Rx" : "",
		   (iHostIntType & 0x0e) >> 1);

	if ((iHostIntType & 0x40) != 0) {	//Timer Event
		self->EventFlag.TimeOut++;
		ClearTimerInt(iobase, 1);
		if (self->io.direction == IO_XMIT) {
			via_ircc_dma_xmit(self, iobase);
		}
		if (self->io.direction == IO_RECV) {
			/*
			 * frame ready hold too long, must reset.
			 */
			if (self->RxDataReady > 30) {
				hwreset(self);
				if (irda_device_txqueue_empty(self->netdev)) {
					via_ircc_dma_receive(self);
				}
			} else {	// call this to upload frame.
				RxTimerHandler(self, iobase);
			}
		}		//RECV
	}			//Timer Event
	if ((iHostIntType & 0x20) != 0) {	//Tx Event
		iTxIntType = GetTXStatus(iobase);

		IRDA_DEBUG(4, "%s(): iTxIntType %02x:  %s %s %s %s\n",
			   __FUNCTION__, iTxIntType,
			   (iTxIntType & 0x08) ? "FIFO underr." : "",
			   (iTxIntType & 0x04) ? "EOM" : "",
			   (iTxIntType & 0x02) ? "FIFO ready" : "",
			   (iTxIntType & 0x01) ? "Early EOM" : "");

		if (iTxIntType & 0x4) {
			self->EventFlag.EOMessage++;	// read and will auto clean
			if (via_ircc_dma_xmit_complete(self)) {
				if (irda_device_txqueue_empty
				    (self->netdev)) {
					via_ircc_dma_receive(self);
				}
			} else {
				self->EventFlag.Unknown++;
			}
		}		//EOP
	}			//Tx Event
	//----------------------------------------
	if ((iHostIntType & 0x10) != 0) {	//Rx Event
		/* Check if DMA has finished */
		iRxIntType = GetRXStatus(iobase);

		IRDA_DEBUG(4, "%s(): iRxIntType %02x:  %s %s %s %s %s %s %s\n",
			   __FUNCTION__, iRxIntType,
			   (iRxIntType & 0x80) ? "PHY err."	: "",
			   (iRxIntType & 0x40) ? "CRC err"	: "",
			   (iRxIntType & 0x20) ? "FIFO overr."	: "",
			   (iRxIntType & 0x10) ? "EOF"		: "",
			   (iRxIntType & 0x08) ? "RxData"	: "",
			   (iRxIntType & 0x02) ? "RxMaxLen"	: "",
			   (iRxIntType & 0x01) ? "SIR bad"	: "");
		if (!iRxIntType)
			IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __FUNCTION__);

		if (iRxIntType & 0x10) {
			if (via_ircc_dma_receive_complete(self, iobase)) {
//F01       if(!(IsFIROn(iobase)))  via_ircc_dma_receive(self);
				via_ircc_dma_receive(self);
			}
		}		// No ERR     
		else {		//ERR
			IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
				   __FUNCTION__, iRxIntType, iHostIntType,
				   RxCurCount(iobase, self),
				   self->RxLastCount);

			if (iRxIntType & 0x20) {	//FIFO OverRun ERR
				ResetChip(iobase, 0);
				ResetChip(iobase, 1);
			} else {	//PHY,CRC ERR

				if (iRxIntType != 0x08)
					hwreset(self);	//F01
			}
			via_ircc_dma_receive(self);
		}		//ERR

	}			//Rx Event
	spin_unlock(&self->lock);
	return IRQ_RETVAL(iHostIntType);
}

static void hwreset(struct via_ircc_cb *self)
{
	int iobase;
	iobase = self->io.fir_base;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	ResetChip(iobase, 5);
	EnableDMA(iobase, OFF);
	EnableTX(iobase, OFF);
	EnableRX(iobase, OFF);
	EnRXDMA(iobase, OFF);
	EnTXDMA(iobase, OFF);
	RXStart(iobase, OFF);
	TXStart(iobase, OFF);
	InitCard(iobase);
	CommonInit(iobase);
	SIRFilter(iobase, ON);
	SetSIR(iobase, ON);
	CRC16(iobase, ON);
	EnTXCRC(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x00);
	SetBaudRate(iobase, 9600);
	SetPulseWidth(iobase, 12);
	SetSendPreambleCount(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x80);

	/* Restore speed. */
	via_ircc_change_speed(self, self->io.speed);

	self->st_fifo.len = 0;
}

/*
 * Function via_ircc_is_receiving (self)
 *
 *    Return TRUE is we are currently receiving a frame
 *
 */
static int via_ircc_is_receiving(struct via_ircc_cb *self)
{
	int status = FALSE;
	int iobase;

	IRDA_ASSERT(self != NULL, return FALSE;);

	iobase = self->io.fir_base;
	if (CkRxRecv(iobase, self))
		status = TRUE;

	IRDA_DEBUG(2, "%s(): status=%x....\n", __FUNCTION__, status);

	return status;
}


/*
 * Function via_ircc_net_open (dev)
 *
 *    Start the device
 *
 */
static int via_ircc_net_open(struct net_device *dev)
{
	struct via_ircc_cb *self;
	int iobase;
	char hwname[32];

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(dev != NULL, return -1;);
	self = (struct via_ircc_cb *) dev->priv;
	self->stats.rx_packets = 0;
	IRDA_ASSERT(self != NULL, return 0;);
	iobase = self->io.fir_base;
	if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
		IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
			     self->io.irq);
		return -EAGAIN;
	}
	/*
	 * Always allocate the DMA channel after the IRQ, and clean up on 
	 * failure.
	 */
	if (request_dma(self->io.dma, dev->name)) {
		IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
			     self->io.dma);
		free_irq(self->io.irq, self);
		return -EAGAIN;
	}
	if (self->io.dma2 != self->io.dma) {
		if (request_dma(self->io.dma2, dev->name)) {
			IRDA_WARNING("%s, unable to allocate dma2=%d\n",
				     driver_name, self->io.dma2);
			free_irq(self->io.irq, self);
Wang Chen's avatar
Wang Chen committed
1549
			free_dma(self->io.dma);
Linus Torvalds's avatar
Linus Torvalds committed
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609
			return -EAGAIN;
		}
	}


	/* turn on interrupts */
	EnAllInt(iobase, ON);
	EnInternalLoop(iobase, OFF);
	EnExternalLoop(iobase, OFF);

	/* */
	via_ircc_dma_receive(self);

	/* Ready to play! */
	netif_start_queue(dev);

	/* 
	 * Open new IrLAP layer instance, now that everything should be
	 * initialized properly 
	 */
	sprintf(hwname, "VIA @ 0x%x", iobase);
	self->irlap = irlap_open(dev, &self->qos, hwname);

	self->RxLastCount = 0;

	return 0;
}

/*
 * Function via_ircc_net_close (dev)
 *
 *    Stop the device
 *
 */
static int via_ircc_net_close(struct net_device *dev)
{
	struct via_ircc_cb *self;
	int iobase;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(dev != NULL, return -1;);
	self = (struct via_ircc_cb *) dev->priv;
	IRDA_ASSERT(self != NULL, return 0;);

	/* Stop device */
	netif_stop_queue(dev);
	/* Stop and remove instance of IrLAP */
	if (self->irlap)
		irlap_close(self->irlap);
	self->irlap = NULL;
	iobase = self->io.fir_base;
	EnTXDMA(iobase, OFF);
	EnRXDMA(iobase, OFF);
	DisableDmaChannel(self->io.dma);

	/* Disable interrupts */
	EnAllInt(iobase, OFF);
	free_irq(self->io.irq, dev);
	free_dma(self->io.dma);
Wang Chen's avatar
Wang Chen committed
1610 1611
	if (self->io.dma2 != self->io.dma)
		free_dma(self->io.dma2);
Linus Torvalds's avatar
Linus Torvalds committed
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676

	return 0;
}

/*
 * Function via_ircc_net_ioctl (dev, rq, cmd)
 *
 *    Process IOCTL commands for this device
 *
 */
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
			      int cmd)
{
	struct if_irda_req *irq = (struct if_irda_req *) rq;
	struct via_ircc_cb *self;
	unsigned long flags;
	int ret = 0;

	IRDA_ASSERT(dev != NULL, return -1;);
	self = dev->priv;
	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name,
		   cmd);
	/* Disable interrupts & save flags */
	spin_lock_irqsave(&self->lock, flags);
	switch (cmd) {
	case SIOCSBANDWIDTH:	/* Set bandwidth */
		if (!capable(CAP_NET_ADMIN)) {
			ret = -EPERM;
			goto out;
		}
		via_ircc_change_speed(self, irq->ifr_baudrate);
		break;
	case SIOCSMEDIABUSY:	/* Set media busy */
		if (!capable(CAP_NET_ADMIN)) {
			ret = -EPERM;
			goto out;
		}
		irda_device_set_media_busy(self->netdev, TRUE);
		break;
	case SIOCGRECEIVING:	/* Check if we are receiving right now */
		irq->ifr_receiving = via_ircc_is_receiving(self);
		break;
	default:
		ret = -EOPNOTSUPP;
	}
      out:
	spin_unlock_irqrestore(&self->lock, flags);
	return ret;
}

static struct net_device_stats *via_ircc_net_get_stats(struct net_device
						       *dev)
{
	struct via_ircc_cb *self = (struct via_ircc_cb *) dev->priv;

	return &self->stats;
}

MODULE_AUTHOR("VIA Technologies,inc");
MODULE_DESCRIPTION("VIA IrDA Device Driver");
MODULE_LICENSE("GPL");

module_init(via_ircc_init);
module_exit(via_ircc_cleanup);