aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/net/irda/ali-ircc.c
blob: f9c889c0dd07b40fa24523970815e411d5a99b18 (plain) (tree)
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
925
926
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
1125
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
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
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
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
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
1344
1345
1346
1347
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
1549
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
1610
1611
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
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925



































                                                                           
                                  




                          








                                 












                                                                             












































                                                                                                   
                                                                        





































                                                                                
                




                                                                                       







                                                          
                      




































































                                                                                                                                        



                                                             













                                                                                        
 
                                                  



                                                    

                                                     












                                                                                       



                                                                                        





                                                                                





























                                                                                          

                                                                




































































                                                                                               

                                                                    

                                       


























































































































































































                                                                                        

                                                           


                          




























                                                                        

                                                           




















































                                                                                                
                                                            
 
                                        




                                                                                       
                         



































































































































































































































































































































































































































































































































































































































































































                                                                                                                                                

                                                               








                                                                          

                                                               

















































































































                                                                                                

                                                                                     
































































































































































































































































































































































































































































                                                                                                                                                                                
                                                                              






                                                    
                                                  

































































































































































































                                                                                                
                                                                            
 
                                                             
        
                                                               

                               
                         




                                         
                 

 
                                                       
 
                                                             

                                
                         


                                        
                                                              

                               
 


                 
















































































































                                                                                                        
/*********************************************************************
 *                
 * Filename:      ali-ircc.h
 * Version:       0.5
 * Description:   Driver for the ALI M1535D and M1543C FIR Controller
 * Status:        Experimental.
 * Author:        Benjamin Kong <benjamin_kong@ali.com.tw>
 * Created at:    2000/10/16 03:46PM
 * Modified at:   2001/1/3 02:55PM
 * Modified by:   Benjamin Kong <benjamin_kong@ali.com.tw>
 * Modified at:   2003/11/6 and support for ALi south-bridge chipsets M1563
 * Modified by:   Clear Zhang <clear_zhang@ali.com.tw>
 * 
 *     Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
 *     All Rights Reserved
 *      
 *     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 of 
 *     the License, or (at your option) any later version.
 *  
 ********************************************************************/

#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/serial_reg.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>

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

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

#include "ali-ircc.h"

#define CHIP_IO_EXTENT 8
#define BROKEN_DONGLE_ID

#define ALI_IRCC_DRIVER_NAME "ali-ircc"

/* Power Management */
static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
static int ali_ircc_resume(struct platform_device *dev);

static struct platform_driver ali_ircc_driver = {
	.suspend	= ali_ircc_suspend,
	.resume		= ali_ircc_resume,
	.driver		= {
		.name	= ALI_IRCC_DRIVER_NAME,
	},
};

/* Module parameters */
static int qos_mtt_bits = 0x07;  /* 1 ms or more */

/* Use BIOS settions by default, but user may supply module parameters */
static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
static unsigned int irq[] = { 0, 0, 0, 0 };
static unsigned int dma[] = { 0, 0, 0, 0 };

static int  ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
static int  ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
static int  ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);

/* These are the currently known ALi sourth-bridge chipsets, the only one difference
 * is that M1543C doesn't support HP HDSL-3600
 */
static ali_chip_t chips[] =
{
	{ "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
	{ "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
	{ "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
	{ NULL }
};

/* Max 4 instances for now */
static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };

/* Dongle Types */
static char *dongle_types[] = {
	"TFDS6000",
	"HP HSDL-3600",
	"HP HSDL-1100",	
	"No dongle connected",
};

/* Some prototypes */
static int  ali_ircc_open(int i, chipio_t *info);

static int  ali_ircc_close(struct ali_ircc_cb *self);

static int  ali_ircc_setup(chipio_t *info);
static int  ali_ircc_is_receiving(struct ali_ircc_cb *self);
static int  ali_ircc_net_open(struct net_device *dev);
static int  ali_ircc_net_close(struct net_device *dev);
static int  ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);

/* SIR function */
static int  ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
static int  ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);

/* FIR function */
static int  ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
static int  ali_ircc_dma_receive(struct ali_ircc_cb *self); 
static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);

/* My Function */
static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);

/* ALi chip function */
static void SIR2FIR(int iobase);
static void FIR2SIR(int iobase);
static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);

/*
 * Function ali_ircc_init ()
 *
 *    Initialize chip. Find out whay kinds of chips we are dealing with
 *    and their configuation registers address
 */
static int __init ali_ircc_init(void)
{
	ali_chip_t *chip;
	chipio_t info;
	int ret;
	int cfg, cfg_base;
	int reg, revision;
	int i = 0;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);

	ret = platform_driver_register(&ali_ircc_driver);
        if (ret) {
                IRDA_ERROR("%s, Can't register driver!\n",
			   ALI_IRCC_DRIVER_NAME);
                return ret;
        }

	ret = -ENODEV;
	
	/* Probe for all the ALi chipsets we know about */
	for (chip= chips; chip->name; chip++, i++) 
	{
		IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name);
				
		/* Try all config registers for this chip */
		for (cfg=0; cfg<2; cfg++)
		{
			cfg_base = chip->cfg[cfg];
			if (!cfg_base)
				continue;
				
			memset(&info, 0, sizeof(chipio_t));
			info.cfg_base = cfg_base;
			info.fir_base = io[i];
			info.dma = dma[i];
			info.irq = irq[i];
			
			
			/* Enter Configuration */
			outb(chip->entr1, cfg_base);
			outb(chip->entr2, cfg_base);
			
			/* Select Logical Device 5 Registers (UART2) */
			outb(0x07, cfg_base);
			outb(0x05, cfg_base+1);
			
			/* Read Chip Identification Register */
			outb(chip->cid_index, cfg_base);	
			reg = inb(cfg_base+1);	
				
			if (reg == chip->cid_value)
			{
				IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __FUNCTION__, cfg_base);
					   
				outb(0x1F, cfg_base);
				revision = inb(cfg_base+1);
				IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __FUNCTION__,
					   chip->name, revision);					
				
				/* 
				 * If the user supplies the base address, then
				 * we init the chip, if not we probe the values
				 * set by the BIOS
				 */				
				if (io[i] < 2000)
				{
					chip->init(chip, &info);
				}
				else
				{
					chip->probe(chip, &info);	
				}
				
				if (ali_ircc_open(i, &info) == 0)
					ret = 0;
				i++;				
			}
			else
			{
				IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __FUNCTION__, chip->name, cfg_base);
			}
			/* Exit configuration */
			outb(0xbb, cfg_base);
		}
	}		
		
	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);					   		

	if (ret)
		platform_driver_unregister(&ali_ircc_driver);

	return ret;
}

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

	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);	

	for (i=0; i < ARRAY_SIZE(dev_self); i++) {
		if (dev_self[i])
			ali_ircc_close(dev_self[i]);
	}
	
	platform_driver_unregister(&ali_ircc_driver);

	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
}

/*
 * Function ali_ircc_open (int i, chipio_t *inf)
 *
 *    Open driver instance
 *
 */
static int ali_ircc_open(int i, chipio_t *info)
{
	struct net_device *dev;
	struct ali_ircc_cb *self;
	int dongle_id;
	int err;
			
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);	

	if (i >= ARRAY_SIZE(dev_self)) {
		IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
			   __FUNCTION__);
		return -ENOMEM;
	}
	
	/* Set FIR FIFO and DMA Threshold */
	if ((ali_ircc_setup(info)) == -1)
		return -1;
		
	dev = alloc_irdadev(sizeof(*self));
	if (dev == NULL) {
		IRDA_ERROR("%s(), can't allocate memory for control block!\n",
			   __FUNCTION__);
		return -ENOMEM;
	}

	self = dev->priv;
	self->netdev = dev;
	spin_lock_init(&self->lock);
   
	/* Need to store self somewhere */
	dev_self[i] = self;
	self->index = i;

	/* Initialize IO */
	self->io.cfg_base  = info->cfg_base;	/* In ali_ircc_probe_53 assign 		*/
	self->io.fir_base  = info->fir_base;	/* info->sir_base = info->fir_base 	*/
	self->io.sir_base  = info->sir_base; 	/* ALi SIR and FIR use the same address */
        self->io.irq       = info->irq;
        self->io.fir_ext   = CHIP_IO_EXTENT;
        self->io.dma       = info->dma;
        self->io.fifo_size = 16;		/* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
	
	/* Reserve the ioports that we need */
	if (!request_region(self->io.fir_base, self->io.fir_ext,
			    ALI_IRCC_DRIVER_NAME)) {
		IRDA_WARNING("%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);
	
	/* The only value we must override it the baudrate */
	self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
		IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
			
	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; 
	self->tx_buff.truesize = 14384;

	/* 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;

	
	/* Keep track of module usage */
	SET_MODULE_OWNER(dev);

	/* Override the network functions we need to use */
	dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
	dev->open            = ali_ircc_net_open;
	dev->stop            = ali_ircc_net_close;
	dev->do_ioctl        = ali_ircc_net_ioctl;
	dev->get_stats	     = ali_ircc_net_get_stats;

	err = register_netdev(dev);
	if (err) {
		IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
		goto err_out4;
	}
	IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);

	/* Check dongle id */
	dongle_id = ali_ircc_read_dongle_id(i, info);
	IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__,
		     ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
		
	self->io.dongle_id = dongle_id;

	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
	
	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:
	dev_self[i] = NULL;
	free_netdev(dev);
	return err;
}


/*
 * Function ali_ircc_close (self)
 *
 *    Close driver instance
 *
 */
static int __exit ali_ircc_close(struct ali_ircc_cb *self)
{
	int iobase;

	IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);

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

        iobase = self->io.fir_base;

	/* Remove netdevice */
	unregister_netdev(self->netdev);

	/* Release the PORT that this driver is using */
	IRDA_DEBUG(4, "%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);
	
	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
	
	return 0;
}

/*
 * Function ali_ircc_init_43 (chip, info)
 *
 *    Initialize the ALi M1543 chip. 
 */
static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info) 
{
	/* All controller information like I/O address, DMA channel, IRQ
	 * are set by BIOS
	 */
	
	return 0;
}

/*
 * Function ali_ircc_init_53 (chip, info)
 *
 *    Initialize the ALi M1535 chip. 
 */
static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info) 
{
	/* All controller information like I/O address, DMA channel, IRQ
	 * are set by BIOS
	 */
	
	return 0;
}

/*
 * Function ali_ircc_probe_53 (chip, info)
 *    	
 *	Probes for the ALi M1535D or M1535
 */
static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
{
	int cfg_base = info->cfg_base;
	int hi, low, reg;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
	
	/* Enter Configuration */
	outb(chip->entr1, cfg_base);
	outb(chip->entr2, cfg_base);
	
	/* Select Logical Device 5 Registers (UART2) */
	outb(0x07, cfg_base);
	outb(0x05, cfg_base+1);
	
	/* Read address control register */
	outb(0x60, cfg_base);
	hi = inb(cfg_base+1);	
	outb(0x61, cfg_base);
	low = inb(cfg_base+1);
	info->fir_base = (hi<<8) + low;
	
	info->sir_base = info->fir_base;
	
	IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
		
	/* Read IRQ control register */
	outb(0x70, cfg_base);
	reg = inb(cfg_base+1);
	info->irq = reg & 0x0f;
	IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
	
	/* Read DMA channel */
	outb(0x74, cfg_base);
	reg = inb(cfg_base+1);
	info->dma = reg & 0x07;
	
	if(info->dma == 0x04)
		IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
	else
		IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
	
	/* Read Enabled Status */
	outb(0x30, cfg_base);
	reg = inb(cfg_base+1);
	info->enabled = (reg & 0x80) && (reg & 0x01);
	IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
	
	/* Read Power Status */
	outb(0x22, cfg_base);
	reg = inb(cfg_base+1);
	info->suspended = (reg & 0x20);
	IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
	
	/* Exit configuration */
	outb(0xbb, cfg_base);
		
	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);	
	
	return 0;	
}

/*
 * Function ali_ircc_setup (info)
 *
 *    	Set FIR FIFO and DMA Threshold
 *	Returns non-negative on success.
 *
 */
static int ali_ircc_setup(chipio_t *info)
{
	unsigned char tmp;
	int version;
	int iobase = info->fir_base;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
	
	/* Locking comments :
	 * Most operations here need to be protected. We are called before
	 * the device instance is created in ali_ircc_open(), therefore 
	 * nobody can bother us - Jean II */

	/* Switch to FIR space */
	SIR2FIR(iobase);
	
	/* Master Reset */
	outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
	
	/* Read FIR ID Version Register */
	switch_bank(iobase, BANK3);
	version = inb(iobase+FIR_ID_VR);
	
	/* Should be 0x00 in the M1535/M1535D */
	if(version != 0x00)
	{
		IRDA_ERROR("%s, Wrong chip version %02x\n",
			   ALI_IRCC_DRIVER_NAME, version);
		return -1;
	}
	
	/* Set FIR FIFO Threshold Register */
	switch_bank(iobase, BANK1);
	outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
	
	/* Set FIR DMA Threshold Register */
	outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
	
	/* CRC enable */
	switch_bank(iobase, BANK2);
	outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
	
	/* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
	
	/* Switch to Bank 0 */
	switch_bank(iobase, BANK0);
	
	tmp = inb(iobase+FIR_LCR_B);
	tmp &=~0x20; // disable SIP
	tmp |= 0x80; // these two steps make RX mode
	tmp &= 0xbf;	
	outb(tmp, iobase+FIR_LCR_B);
		
	/* Disable Interrupt */
	outb(0x00, iobase+FIR_IER);
	
	
	/* Switch to SIR space */
	FIR2SIR(iobase);
	
	IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
		     ALI_IRCC_DRIVER_NAME);
	
	/* Enable receive interrupts */ 
	// outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
	// Turn on the interrupts in ali_ircc_net_open
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);	
	
	return 0;
}

/*
 * Function ali_ircc_read_dongle_id (int index, info)
 *
 * Try to read dongle indentification. This procedure needs to be executed
 * once after power-on/reset. It also needs to be used whenever you suspect
 * that the user may have plugged/unplugged the IrDA Dongle.
 */
static int ali_ircc_read_dongle_id (int i, chipio_t *info)
{
	int dongle_id, reg;
	int cfg_base = info->cfg_base;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
		
	/* Enter Configuration */
	outb(chips[i].entr1, cfg_base);
	outb(chips[i].entr2, cfg_base);
	
	/* Select Logical Device 5 Registers (UART2) */
	outb(0x07, cfg_base);
	outb(0x05, cfg_base+1);
	
	/* Read Dongle ID */
	outb(0xf0, cfg_base);
	reg = inb(cfg_base+1);	
	dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
	IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__, 
		dongle_id, dongle_types[dongle_id]);
	
	/* Exit configuration */
	outb(0xbb, cfg_base);
			
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);	
	
	return dongle_id;
}

/*
 * Function ali_ircc_interrupt (irq, dev_id, regs)
 *
 *    An interrupt from the chip has arrived. Time to do some work
 *
 */
static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct ali_ircc_cb *self;
	int ret;
		
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
		
	self = dev->priv;
	
	spin_lock(&self->lock);
	
	/* Dispatch interrupt handler for the current speed */
	if (self->io.speed > 115200)
		ret = ali_ircc_fir_interrupt(self);
	else
		ret = ali_ircc_sir_interrupt(self);
		
	spin_unlock(&self->lock);
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
	return ret;
}
/*
 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
 *
 *    Handle MIR/FIR interrupt
 *
 */
static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
{
	__u8 eir, OldMessageCount;
	int iobase, tmp;
	
	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
	
	iobase = self->io.fir_base;
	
	switch_bank(iobase, BANK0);	
	self->InterruptID = inb(iobase+FIR_IIR);		
	self->BusStatus = inb(iobase+FIR_BSR);	
	
	OldMessageCount = (self->LineStatus + 1) & 0x07;
	self->LineStatus = inb(iobase+FIR_LSR);	
	//self->ier = inb(iobase+FIR_IER); 		2000/12/1 04:32PM
	eir = self->InterruptID & self->ier; /* Mask out the interesting ones */ 
	
	IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
	IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
	IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
	IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
	
	/* Disable interrupts */
	 SetCOMInterrupts(self, FALSE);
	
	/* Tx or Rx Interrupt */
	
	if (eir & IIR_EOM) 
	{		
		if (self->io.direction == IO_XMIT) /* TX */
		{
			IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
			
			if(ali_ircc_dma_xmit_complete(self))
			{
				if (irda_device_txqueue_empty(self->netdev)) 
				{
					/* Prepare for receive */
					ali_ircc_dma_receive(self);					
					self->ier = IER_EOM;									
				}
			}
			else
			{
				self->ier = IER_EOM; 					
			}
									
		}	
		else /* RX */
		{
			IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
			
			if(OldMessageCount > ((self->LineStatus+1) & 0x07))
			{
				self->rcvFramesOverflow = TRUE;	
				IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
			}
						
			if (ali_ircc_dma_receive_complete(self))
			{
				IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
				
				self->ier = IER_EOM;				
			}
			else
			{
				IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
				
				self->ier = IER_EOM | IER_TIMER;								
			}	
		
		}		
	}
	/* Timer Interrupt */
	else if (eir & IIR_TIMER)
	{	
		if(OldMessageCount > ((self->LineStatus+1) & 0x07))
		{
			self->rcvFramesOverflow = TRUE;	
			IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
		}
		/* Disable Timer */
		switch_bank(iobase, BANK1);
		tmp = inb(iobase+FIR_CR);
		outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
		
		/* Check if this is a Tx timer interrupt */
		if (self->io.direction == IO_XMIT)
		{
			ali_ircc_dma_xmit(self);
			
			/* Interrupt on EOM */
			self->ier = IER_EOM;
									
		}
		else /* Rx */
		{
			if(ali_ircc_dma_receive_complete(self)) 
			{
				self->ier = IER_EOM;
			}
			else
			{
				self->ier = IER_EOM | IER_TIMER;
			}	
		}		
	}
	
	/* Restore Interrupt */	
	SetCOMInterrupts(self, TRUE);	
		
	IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
	return IRQ_RETVAL(eir);
}

/*
 * Function ali_ircc_sir_interrupt (irq, self, eir)
 *
 *    Handle SIR interrupt
 *
 */
static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
{
	int iobase;
	int iir, lsr;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
	
	iobase = self->io.sir_base;

	iir = inb(iobase+UART_IIR) & UART_IIR_ID;
	if (iir) {	
		/* Clear interrupt */
		lsr = inb(iobase+UART_LSR);

		IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__, 
			   iir, lsr, iobase);

		switch (iir) 
		{
			case UART_IIR_RLSI:
				IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
				break;
			case UART_IIR_RDI:
				/* Receive interrupt */
				ali_ircc_sir_receive(self);
				break;
			case UART_IIR_THRI:
				if (lsr & UART_LSR_THRE)
				{
					/* Transmitter ready for data */
					ali_ircc_sir_write_wakeup(self);				
				}				
				break;
			default:
				IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
				break;
		} 
		
	}
	
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);	

	return IRQ_RETVAL(iir);
}


/*
 * Function ali_ircc_sir_receive (self)
 *
 *    Receive one frame from the infrared port
 *
 */
static void ali_ircc_sir_receive(struct ali_ircc_cb *self) 
{
	int boguscount = 0;
	int iobase;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
	IRDA_ASSERT(self != NULL, return;);

	iobase = self->io.sir_base;

	/*  
	 * Receive all characters in Rx FIFO, unwrap and unstuff them. 
         * async_unwrap_char will deliver all found frames  
	 */
	do {
		async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, 
				  inb(iobase+UART_RX));

		/* Make sure we don't stay here too long */
		if (boguscount++ > 32) {
			IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
			break;
		}
	} while (inb(iobase+UART_LSR) & UART_LSR_DR);	
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

/*
 * Function ali_ircc_sir_write_wakeup (tty)
 *
 *    Called by the driver when there's room for more data.  If we have
 *    more packets to send, we send them here.
 *
 */
static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
{
	int actual = 0;
	int iobase;	

	IRDA_ASSERT(self != NULL, return;);

	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	iobase = self->io.sir_base;

	/* Finished with frame?  */
	if (self->tx_buff.len > 0)  
	{
		/* Write data left in transmit buffer */
		actual = ali_ircc_sir_write(iobase, self->io.fifo_size, 
				      self->tx_buff.data, self->tx_buff.len);
		self->tx_buff.data += actual;
		self->tx_buff.len  -= actual;
	} 
	else 
	{
		if (self->new_speed) 
		{
			/* We must wait until all data are gone */
			while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
				IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
			
			IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
			ali_ircc_change_speed(self, self->new_speed);
			self->new_speed = 0;			
			
			// benjamin 2000/11/10 06:32PM
			if (self->io.speed > 115200)
			{
				IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );				
					
				self->ier = IER_EOM;
				// SetCOMInterrupts(self, TRUE);							
				return;							
			}
		}
		else
		{
			netif_wake_queue(self->netdev);	
		}
			
		self->stats.tx_packets++;
		
		/* Turn on receive interrupts */
		outb(UART_IER_RDI, iobase+UART_IER);
	}
		
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
{
	struct net_device *dev = self->netdev;
	int iobase;
	
	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
	
	/* This function *must* be called with irq off and spin-lock.
	 * - Jean II */

	iobase = self->io.fir_base;
	
	SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
	
	/* Go to MIR, FIR Speed */
	if (baud > 115200)
	{
		
					
		ali_ircc_fir_change_speed(self, baud);			
		
		/* Install FIR xmit handler*/
		dev->hard_start_xmit = ali_ircc_fir_hard_xmit;		
				
		/* Enable Interuupt */
		self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM					
				
		/* Be ready for incomming frames */
		ali_ircc_dma_receive(self);	// benajmin 2000/11/8 07:46PM not complete
	}	
	/* Go to SIR Speed */
	else
	{
		ali_ircc_sir_change_speed(self, baud);
				
		/* Install SIR xmit handler*/
		dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
	}
	
		
	SetCOMInterrupts(self, TRUE);	// 2000/11/24 11:43AM
		
	netif_wake_queue(self->netdev);	
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
{
		
	int iobase; 
	struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
	struct net_device *dev;

	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
		
	IRDA_ASSERT(self != NULL, return;);

	dev = self->netdev;
	iobase = self->io.fir_base;
	
	IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
	
	/* Come from SIR speed */
	if(self->io.speed <=115200)
	{
		SIR2FIR(iobase);
	}
		
	/* Update accounting for new speed */
	self->io.speed = baud;
		
	// Set Dongle Speed mode
	ali_ircc_change_dongle_speed(self, baud);
		
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

/*
 * Function ali_sir_change_speed (self, speed)
 *
 *    Set speed of IrDA port to specified baudrate
 *
 */
static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
{
	struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
	unsigned long flags;
	int iobase; 
	int fcr;    /* FIFO control reg */
	int lcr;    /* Line control reg */
	int divisor;

	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);

	IRDA_ASSERT(self != NULL, return;);

	iobase = self->io.sir_base;
	
	/* Come from MIR or FIR speed */
	if(self->io.speed >115200)
	{	
		// Set Dongle Speed mode first
		ali_ircc_change_dongle_speed(self, speed);
			
		FIR2SIR(iobase);
	}
		
	// Clear Line and Auxiluary status registers 2000/11/24 11:47AM
		
	inb(iobase+UART_LSR);
	inb(iobase+UART_SCR);
		
	/* Update accounting for new speed */
	self->io.speed = speed;

	spin_lock_irqsave(&self->lock, flags);

	divisor = 115200/speed;
	
	fcr = UART_FCR_ENABLE_FIFO;

	/* 
	 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
	 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
	 * about this timeout since it will always be fast enough. 
	 */
	if (self->io.speed < 38400)
		fcr |= UART_FCR_TRIGGER_1;
	else 
		fcr |= UART_FCR_TRIGGER_14;
        
	/* IrDA ports use 8N1 */
	lcr = UART_LCR_WLEN8;
	
	outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
	outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
	outb(divisor >> 8,	  iobase+UART_DLM);
	outb(lcr,		  iobase+UART_LCR); /* Set 8N1	*/
	outb(fcr,		  iobase+UART_FCR); /* Enable FIFO's */

	/* without this, the conection will be broken after come back from FIR speed,
	   but with this, the SIR connection is harder to established */
	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
	
	spin_unlock_irqrestore(&self->lock, flags);
	
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
{
	
	struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
	int iobase,dongle_id;
	int tmp = 0;
			
	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );	
	
	iobase = self->io.fir_base; 	/* or iobase = self->io.sir_base; */
	dongle_id = self->io.dongle_id;
	
	/* We are already locked, no need to do it again */
		
	IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);		
	
	switch_bank(iobase, BANK2);
	tmp = inb(iobase+FIR_IRDA_CR);
		
	/* IBM type dongle */
	if(dongle_id == 0)
	{				
		if(speed == 4000000)
		{
			//	      __ __	
			// SD/MODE __|     |__ __
			//               __ __ 
			// IRTX    __ __|     |__
			//         T1 T2 T3 T4 T5
			
			tmp &=  ~IRDA_CR_HDLC;		// HDLC=0
			tmp |= IRDA_CR_CRC;	   	// CRC=1
			
			switch_bank(iobase, BANK2);
			outb(tmp, iobase+FIR_IRDA_CR);
			
      			// T1 -> SD/MODE:0 IRTX:0
      			tmp &= ~0x09;
      			tmp |= 0x02;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// T2 -> SD/MODE:1 IRTX:0
      			tmp &= ~0x01;
      			tmp |= 0x0a;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// T3 -> SD/MODE:1 IRTX:1
      			tmp |= 0x0b;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// T4 -> SD/MODE:0 IRTX:1
      			tmp &= ~0x08;
      			tmp |= 0x03;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// T5 -> SD/MODE:0 IRTX:0
      			tmp &= ~0x09;
      			tmp |= 0x02;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// reset -> Normal TX output Signal
      			outb(tmp & ~0x02, iobase+FIR_IRDA_CR);      			
		}
		else /* speed <=1152000 */
		{	
			//	      __	
			// SD/MODE __|  |__
			//
			// IRTX    ________
			//         T1 T2 T3  
			
			/* MIR 115200, 57600 */
			if (speed==1152000)
			{
				tmp |= 0xA0;	   //HDLC=1, 1.152Mbps=1
      			}
      			else
      			{
				tmp &=~0x80;	   //HDLC 0.576Mbps
				tmp |= 0x20;	   //HDLC=1,
      			}			
      			
      			tmp |= IRDA_CR_CRC;	   	// CRC=1
      			
      			switch_bank(iobase, BANK2);
      			outb(tmp, iobase+FIR_IRDA_CR);
						
			/* MIR 115200, 57600 */	
						
			//switch_bank(iobase, BANK2);			
			// T1 -> SD/MODE:0 IRTX:0
      			tmp &= ~0x09;
      			tmp |= 0x02;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// T2 -> SD/MODE:1 IRTX:0
      			tmp &= ~0x01;     
      			tmp |= 0x0a;      
      			outb(tmp, iobase+FIR_IRDA_CR);
      			
      			// T3 -> SD/MODE:0 IRTX:0
      			tmp &= ~0x09;
      			tmp |= 0x02;
      			outb(tmp, iobase+FIR_IRDA_CR);
      			udelay(2);
      			
      			// reset -> Normal TX output Signal
      			outb(tmp & ~0x02, iobase+FIR_IRDA_CR);      						
		}		
	}
	else if (dongle_id == 1) /* HP HDSL-3600 */
	{
		switch(speed)
		{
		case 4000000:
			tmp &=  ~IRDA_CR_HDLC;	// HDLC=0
			break;	
			
		case 1152000:
			tmp |= 0xA0;	   	// HDLC=1, 1.152Mbps=1
      			break;
      			
      		case 576000:
      			tmp &=~0x80;	   	// HDLC 0.576Mbps
			tmp |= 0x20;	   	// HDLC=1,
			break;
      		}			
			
		tmp |= IRDA_CR_CRC;	   	// CRC=1
			
		switch_bank(iobase, BANK2);
      		outb(tmp, iobase+FIR_IRDA_CR);		
	}
	else /* HP HDSL-1100 */
	{
		if(speed <= 115200) /* SIR */
		{
			
			tmp &= ~IRDA_CR_FIR_SIN;	// HP sin select = 0
			
			switch_bank(iobase, BANK2);
      			outb(tmp, iobase+FIR_IRDA_CR);			
		}
		else /* MIR FIR */
		{	
			
			switch(speed)
			{
			case 4000000:
				tmp &=  ~IRDA_CR_HDLC;	// HDLC=0
				break;	
			
			case 1152000:
				tmp |= 0xA0;	   	// HDLC=1, 1.152Mbps=1
      				break;
      			
      			case 576000:
      				tmp &=~0x80;	   	// HDLC 0.576Mbps
				tmp |= 0x20;	   	// HDLC=1,
				break;
      			}			
			
			tmp |= IRDA_CR_CRC;	   	// CRC=1
			tmp |= IRDA_CR_FIR_SIN;		// HP sin select = 1
			
			switch_bank(iobase, BANK2);
      			outb(tmp, iobase+FIR_IRDA_CR);			
		}
	}
			
	switch_bank(iobase, BANK0);
	
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );		
}

/*
 * Function ali_ircc_sir_write (driver)
 *
 *    Fill Tx FIFO with transmit data
 *
 */
static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
{
	int actual = 0;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
		
	/* Tx FIFO should be empty! */
	if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
		IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
		return 0;
	}
        
	/* Fill FIFO with current frame */
	while ((fifo_size-- > 0) && (actual < len)) {
		/* Transmit next byte */
		outb(buf[actual], iobase+UART_TX);

		actual++;
	}
	
        IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	return actual;
}

/*
 * Function ali_ircc_net_open (dev)
 *
 *    Start the device
 *
 */
static int ali_ircc_net_open(struct net_device *dev)
{
	struct ali_ircc_cb *self;
	int iobase;
	char hwname[32];
		
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	IRDA_ASSERT(dev != NULL, return -1;);
	
	self = (struct ali_ircc_cb *) dev->priv;
	
	IRDA_ASSERT(self != NULL, return 0;);
	
	iobase = self->io.fir_base;
	
	/* Request IRQ and install Interrupt Handler */
	if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev)) 
	{
		IRDA_WARNING("%s, unable to allocate irq=%d\n",
			     ALI_IRCC_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",
			     ALI_IRCC_DRIVER_NAME,
			     self->io.dma);
		free_irq(self->io.irq, self);
		return -EAGAIN;
	}
	
	/* Turn on interrups */
	outb(UART_IER_RDI , iobase+UART_IER);

	/* Ready to play! */
	netif_start_queue(dev); //benjamin by irport
	
	/* Give self a hardware name */
	sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);

	/* 
	 * Open new IrLAP layer instance, now that everything should be
	 * initialized properly 
	 */
	self->irlap = irlap_open(dev, &self->qos, hwname);
		
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	
	return 0;
}

/*
 * Function ali_ircc_net_close (dev)
 *
 *    Stop the device
 *
 */
static int ali_ircc_net_close(struct net_device *dev)
{	

	struct ali_ircc_cb *self;
	//int iobase;
			
	IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
		
	IRDA_ASSERT(dev != NULL, return -1;);

	self = (struct ali_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;
		
	disable_dma(self->io.dma);

	/* Disable interrupts */
	SetCOMInterrupts(self, FALSE);
	       
	free_irq(self->io.irq, dev);
	free_dma(self->io.dma);

	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	
	return 0;
}

/*
 * Function ali_ircc_fir_hard_xmit (skb, dev)
 *
 *    Transmit the frame
 *
 */
static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct ali_ircc_cb *self;
	unsigned long flags;
	int iobase;
	__u32 speed;
	int mtt, diff;
	
	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );	
	
	self = (struct ali_ircc_cb *) dev->priv;
	iobase = self->io.fir_base;

	netif_stop_queue(dev);
	
	/* Make sure tests *& speed change are atomic */
	spin_lock_irqsave(&self->lock, flags);
	
	/* Note : you should make sure that speed changes are not going
	 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
	 * details - Jean II */

	/* 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) {
			ali_ircc_change_speed(self, speed); 
			dev->trans_start = jiffies;
			spin_unlock_irqrestore(&self->lock, flags);
			dev_kfree_skb(skb);
			return 0;
		} else
			self->new_speed = speed;
	}

	/* Register and copy this frame to DMA memory */
	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;

	skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
		      skb->len);
	self->tx_fifo.len++;
	self->tx_fifo.free++;

	/* Start transmit only if there is currently no transmit going on */
	if (self->tx_fifo.len == 1) 
	{
		/* Check if we must wait the min turn time or not */
		mtt = irda_get_mtt(skb);
				
		if (mtt) 
		{
			/* Check how much time we have used already */
			do_gettimeofday(&self->now);
			
			diff = self->now.tv_usec - self->stamp.tv_usec;
			/* self->stamp is set from ali_ircc_dma_receive_complete() */
							
			IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);	
			
			if (diff < 0) 
				diff += 1000000;
			
			/* Check if the mtt is larger than the time we have
			 * already used by all the protocol processing
			 */
			if (mtt > diff)
			{				
				mtt -= diff;
								
				/* 
				 * Use timer if delay larger than 1000 us, and
				 * use udelay for smaller values which should
				 * be acceptable
				 */
				if (mtt > 500) 
				{
					/* Adjust for timer resolution */
					mtt = (mtt+250) / 500; 	/* 4 discard, 5 get advanced, Let's round off */
					
					IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);	
					
					/* Setup timer */
					if (mtt == 1) /* 500 us */
					{
						switch_bank(iobase, BANK1);
						outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
					}	
					else if (mtt == 2) /* 1 ms */
					{
						switch_bank(iobase, BANK1);
						outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
					}					
					else /* > 2ms -> 4ms */
					{
						switch_bank(iobase, BANK1);
						outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
					}
					
					
					/* Start timer */
					outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
					self->io.direction = IO_XMIT;
					
					/* Enable timer interrupt */
					self->ier = IER_TIMER;
					SetCOMInterrupts(self, TRUE);					
					
					/* Timer will take care of the rest */
					goto out; 
				} 
				else
					udelay(mtt);
			} // if (if (mtt > diff)
		}// if (mtt) 
				
		/* Enable EOM interrupt */
		self->ier = IER_EOM;
		SetCOMInterrupts(self, TRUE);
		
		/* Transmit frame */
		ali_ircc_dma_xmit(self);
	} // if (self->tx_fifo.len == 1) 
	
 out:
 	
	/* Not busy transmitting anymore if window is not full */
	if (self->tx_fifo.free < MAX_TX_WINDOW)
		netif_wake_queue(self->netdev);
	
	/* Restore bank register */
	switch_bank(iobase, BANK0);

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

	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	return 0;	
}


static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
{
	int iobase, tmp;
	unsigned char FIFO_OPTI, Hi, Lo;
	
	
	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );	
	
	iobase = self->io.fir_base;
	
	/* FIFO threshold , this method comes from NDIS5 code */
	
	if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
		FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
	else
		FIFO_OPTI = TX_FIFO_Threshold;
	
	/* Disable DMA */
	switch_bank(iobase, BANK1);
	outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
	
	self->io.direction = IO_XMIT;
	
	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);
		
	/* Reset Tx FIFO */
	switch_bank(iobase, BANK0);
	outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
	
	/* Set Tx FIFO threshold */
	if (self->fifo_opti_buf!=FIFO_OPTI) 
	{
		switch_bank(iobase, BANK1);
	    	outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
	    	self->fifo_opti_buf=FIFO_OPTI;
	}
	
	/* Set Tx DMA threshold */
	switch_bank(iobase, BANK1);
	outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
	
	/* Set max Tx frame size */
	Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
	Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
	switch_bank(iobase, BANK2);
	outb(Hi, iobase+FIR_TX_DSR_HI);
	outb(Lo, iobase+FIR_TX_DSR_LO);
	
	/* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
	switch_bank(iobase, BANK0);	
	tmp = inb(iobase+FIR_LCR_B);
	tmp &= ~0x20; // Disable SIP
	outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
	IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
	
	outb(0, iobase+FIR_LSR);
			
	/* Enable DMA and Burst Mode */
	switch_bank(iobase, BANK1);
	outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
	
	switch_bank(iobase, BANK0); 
	
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
}

static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
{
	int iobase;
	int ret = TRUE;
	
	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );	
	
	iobase = self->io.fir_base;
	
	/* Disable DMA */
	switch_bank(iobase, BANK1);
	outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
	
	/* Check for underrun! */
	switch_bank(iobase, BANK0);
	if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
	
	{
		IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);	
		self->stats.tx_errors++;
		self->stats.tx_fifo_errors++;		
	}
	else 
	{
		self->stats.tx_packets++;
	}

	/* Check if we need to change the speed */
	if (self->new_speed) 
	{
		ali_ircc_change_speed(self, self->new_speed);
		self->new_speed = 0;
	}

	/* Finished with this frame, so prepare for next */
	self->tx_fifo.ptr++;
	self->tx_fifo.len--;

	/* Any frames to be sent back-to-back? */
	if (self->tx_fifo.len) 
	{
		ali_ircc_dma_xmit(self);
		
		/* Not finished yet! */
		ret = FALSE;
	} 
	else 
	{	/* 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;
	}

	/* Make sure we have room for more frames */
	if (self->tx_fifo.free < MAX_TX_WINDOW) {
		/* Not busy transmitting anymore */
		/* Tell the network layer, that we can accept more frames */
		netif_wake_queue(self->netdev);
	}
		
	switch_bank(iobase, BANK0); 
	
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	return ret;
}

/*
 * Function ali_ircc_dma_receive (self)
 *
 *    Get ready for receiving a frame. The device will initiate a DMA
 *    if it starts to receive a frame.
 *
 */
static int ali_ircc_dma_receive(struct ali_ircc_cb *self) 
{
	int iobase, tmp;
	
	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );	
	
	iobase = self->io.fir_base;
	
	/* 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;
		
	/* Disable DMA */
	switch_bank(iobase, BANK1);
	outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
	
	/* Reset Message Count */
	switch_bank(iobase, BANK0);
	outb(0x07, iobase+FIR_LSR);
		
	self->rcvFramesOverflow = FALSE;	
	
	self->LineStatus = inb(iobase+FIR_LSR) ;
	
	/* Reset Rx FIFO info */
	self->io.direction = IO_RECV;
	self->rx_buff.data = self->rx_buff.head;
		
	/* Reset Rx FIFO */
	// switch_bank(iobase, BANK0);
	outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A); 
	
	self->st_fifo.len = self->st_fifo.pending_bytes = 0;
	self->st_fifo.tail = self->st_fifo.head = 0;
		
	irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
		       DMA_RX_MODE);
	 
	/* Set Receive Mode,Brick Wall */
	//switch_bank(iobase, BANK0);
	tmp = inb(iobase+FIR_LCR_B);
	outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
	IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
			
	/* Set Rx Threshold */
	switch_bank(iobase, BANK1);
	outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
	outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
		
	/* Enable DMA and Burst Mode */
	// switch_bank(iobase, BANK1);
	outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
				
	switch_bank(iobase, BANK0); 
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	return 0;
}

static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
{
	struct st_fifo *st_fifo;
	struct sk_buff *skb;
	__u8 status, MessageCount;
	int len, i, iobase, val;	

	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );	

	st_fifo = &self->st_fifo;		
	iobase = self->io.fir_base;	
		
	switch_bank(iobase, BANK0);
	MessageCount = inb(iobase+ FIR_LSR)&0x07;
	
	if (MessageCount > 0)	
		IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);	
		
	for (i=0; i<=MessageCount; i++)
	{
		/* Bank 0 */
		switch_bank(iobase, BANK0);
		status = inb(iobase+FIR_LSR);
		
		switch_bank(iobase, BANK2);
		len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
		len = len << 8; 
		len |= inb(iobase+FIR_RX_DSR_LO);
		
		IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);	
		IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
		
		if (st_fifo->tail >= MAX_RX_WINDOW) {
			IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
			continue;
		}
			
		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++;
	}
			
	for (i=0; i<=MessageCount; i++)
	{	
		/* Get first entry */
		status = st_fifo->entries[st_fifo->head].status;
		len    = st_fifo->entries[st_fifo->head].len;
		st_fifo->pending_bytes -= len;
		st_fifo->head++;
		st_fifo->len--;			
		
		/* Check for errors */
		if ((status & 0xd8) || self->rcvFramesOverflow || (len==0)) 		
		{
			IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );	
			
			/* Skip frame */
			self->stats.rx_errors++;
			
			self->rx_buff.data += len;
			
			if (status & LSR_FIFO_UR) 
			{
				self->stats.rx_frame_errors++;
				IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
			}	
			if (status & LSR_FRAME_ERROR)
			{
				self->stats.rx_frame_errors++;
				IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
			}
							
			if (status & LSR_CRC_ERROR) 
			{
				self->stats.rx_crc_errors++;
				IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
			}
			
			if(self->rcvFramesOverflow)
			{
				self->stats.rx_frame_errors++;
				IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );								
			}
			if(len == 0)
			{
				self->stats.rx_frame_errors++;
				IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
			}
		}	 
		else 
		{
			
			if (st_fifo->pending_bytes < 32) 
			{
				switch_bank(iobase, BANK0);
				val = inb(iobase+FIR_BSR);	
				if ((val& BSR_FIFO_NOT_EMPTY)== 0x80) 
				{
					IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
					
					/* Put this entry back in fifo */
					st_fifo->head--;
					st_fifo->len++;
					st_fifo->pending_bytes += len;
					st_fifo->entries[st_fifo->head].status = status;
					st_fifo->entries[st_fifo->head].len = len;
						
					/*  
		 			* DMA not finished yet, so try again 
		 			* later, set timer value, resolution 
		 			* 500 us 
		 			*/
					 
					switch_bank(iobase, BANK1);
					outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
					
					/* Enable Timer */
					outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
						
					return FALSE; /* I'll be back! */
				}
			}		
			
			/* 
			 * Remember the time we received this frame, so we can
			 * reduce the min turn time a bit since we will know
			 * how much time we have used for protocol processing
			 */
			do_gettimeofday(&self->stamp);

			skb = dev_alloc_skb(len+1);
			if (skb == NULL)  
			{
				IRDA_WARNING("%s(), memory squeeze, "
					     "dropping frame.\n",
					     __FUNCTION__);
				self->stats.rx_dropped++;

				return FALSE;
			}
			
			/* Make sure IP header gets aligned */
			skb_reserve(skb, 1); 
			
			/* Copy frame without CRC, CRC is removed by hardware*/
			skb_put(skb, len);
			skb_copy_to_linear_data(skb, self->rx_buff.data, len);

			/* Move to next frame */
			self->rx_buff.data += len;
			self->stats.rx_bytes += len;
			self->stats.rx_packets++;

			skb->dev = self->netdev;
			skb_reset_mac_header(skb);
			skb->protocol = htons(ETH_P_IRDA);
			netif_rx(skb);
			self->netdev->last_rx = jiffies;
		}
	}
	
	switch_bank(iobase, BANK0);	
		
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	return TRUE;
}



/*
 * Function ali_ircc_sir_hard_xmit (skb, dev)
 *
 *    Transmit the frame!
 *
 */
static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct ali_ircc_cb *self;
	unsigned long flags;
	int iobase;
	__u32 speed;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	IRDA_ASSERT(dev != NULL, return 0;);
	
	self = (struct ali_ircc_cb *) dev->priv;
	IRDA_ASSERT(self != NULL, return 0;);

	iobase = self->io.sir_base;

	netif_stop_queue(dev);
	
	/* Make sure tests *& speed change are atomic */
	spin_lock_irqsave(&self->lock, flags);

	/* Note : you should make sure that speed changes are not going
	 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
	 * details - Jean II */

	/* 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) {
			ali_ircc_change_speed(self, speed); 
			dev->trans_start = jiffies;
			spin_unlock_irqrestore(&self->lock, flags);
			dev_kfree_skb(skb);
			return 0;
		} else
			self->new_speed = speed;
	}

	/* Init tx buffer */
	self->tx_buff.data = self->tx_buff.head;

        /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
	self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, 
					   self->tx_buff.truesize);
	
	self->stats.tx_bytes += self->tx_buff.len;

	/* Turn on transmit finished interrupt. Will fire immediately!  */
	outb(UART_IER_THRI, iobase+UART_IER); 

	dev->trans_start = jiffies;
	spin_unlock_irqrestore(&self->lock, flags);

	dev_kfree_skb(skb);
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	
	return 0;	
}


/*
 * Function ali_ircc_net_ioctl (dev, rq, cmd)
 *
 *    Process IOCTL commands for this device
 *
 */
static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct if_irda_req *irq = (struct if_irda_req *) rq;
	struct ali_ircc_cb *self;
	unsigned long flags;
	int ret = 0;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	IRDA_ASSERT(dev != NULL, return -1;);

	self = dev->priv;

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

	IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
	
	switch (cmd) {
	case SIOCSBANDWIDTH: /* Set bandwidth */
		IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
		/*
		 * This function will also be used by IrLAP to change the
		 * speed, so we still must allow for speed change within
		 * interrupt context.
		 */
		if (!in_interrupt() && !capable(CAP_NET_ADMIN))
			return -EPERM;
		
		spin_lock_irqsave(&self->lock, flags);
		ali_ircc_change_speed(self, irq->ifr_baudrate);		
		spin_unlock_irqrestore(&self->lock, flags);
		break;
	case SIOCSMEDIABUSY: /* Set media busy */
		IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
		irda_device_set_media_busy(self->netdev, TRUE);
		break;
	case SIOCGRECEIVING: /* Check if we are receiving right now */
		IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
		/* This is protected */
		irq->ifr_receiving = ali_ircc_is_receiving(self);
		break;
	default:
		ret = -EOPNOTSUPP;
	}
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	
	return ret;
}

/*
 * Function ali_ircc_is_receiving (self)
 *
 *    Return TRUE is we are currently receiving a frame
 *
 */
static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
{
	unsigned long flags;
	int status = FALSE;
	int iobase;		
	
	IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
	
	IRDA_ASSERT(self != NULL, return FALSE;);

	spin_lock_irqsave(&self->lock, flags);

	if (self->io.speed > 115200) 
	{
		iobase = self->io.fir_base;
		
		switch_bank(iobase, BANK1);
		if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0) 		
		{
			/* We are receiving something */
			IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
			status = TRUE;
		}
		switch_bank(iobase, BANK0);		
	} 
	else
	{ 
		status = (self->rx_buff.state != OUTSIDE_FRAME);
	}
	
	spin_unlock_irqrestore(&self->lock, flags);
	
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
	
	return status;
}

static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
{
	struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
	
	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
		
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
	
	return &self->stats;
}

static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
{
	struct ali_ircc_cb *self = platform_get_drvdata(dev);
	
	IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);

	if (self->io.suspended)
		return 0;

	ali_ircc_net_close(self->netdev);

	self->io.suspended = 1;
	
	return 0;
}

static int ali_ircc_resume(struct platform_device *dev)
{
	struct ali_ircc_cb *self = platform_get_drvdata(dev);
	
	if (!self->io.suspended)
		return 0;
	
	ali_ircc_net_open(self->netdev);
	
	IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);

	self->io.suspended = 0;

	return 0;
}

/* ALi Chip Function */

static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
{
	
	unsigned char newMask;
	
	int iobase = self->io.fir_base; /* or sir_base */

	IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);	
	
	/* Enable the interrupt which we wish to */
	if (enable){
		if (self->io.direction == IO_XMIT)
		{
			if (self->io.speed > 115200) /* FIR, MIR */
			{
				newMask = self->ier;
			}
			else /* SIR */
			{
				newMask = UART_IER_THRI | UART_IER_RDI;
			}
		}
		else {
			if (self->io.speed > 115200) /* FIR, MIR */
			{
				newMask = self->ier;
			}
			else /* SIR */
			{
				newMask = UART_IER_RDI;
			}
		}
	}
	else /* Disable all the interrupts */
	{
		newMask = 0x00;

	}

	//SIR and FIR has different registers
	if (self->io.speed > 115200)
	{	
		switch_bank(iobase, BANK0);
		outb(newMask, iobase+FIR_IER);
	}
	else
		outb(newMask, iobase+UART_IER);
		
	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

static void SIR2FIR(int iobase)
{
	//unsigned char tmp;
		
	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	/* Already protected (change_speed() or setup()), no need to lock.
	 * Jean II */
	
	outb(0x28, iobase+UART_MCR);
	outb(0x68, iobase+UART_MCR);
	outb(0x88, iobase+UART_MCR);		
	
	outb(0x60, iobase+FIR_MCR); 	/*  Master Reset */
	outb(0x20, iobase+FIR_MCR); 	/*  Master Interrupt Enable */
	
	//tmp = inb(iobase+FIR_LCR_B);	/* SIP enable */
	//tmp |= 0x20;
	//outb(tmp, iobase+FIR_LCR_B);	
	
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );	
}

static void FIR2SIR(int iobase)
{
	unsigned char val;
	
	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
	
	/* Already protected (change_speed() or setup()), no need to lock.
	 * Jean II */
	
	outb(0x20, iobase+FIR_MCR); 	/* IRQ to low */
	outb(0x00, iobase+UART_IER); 	
		
	outb(0xA0, iobase+FIR_MCR); 	/* Don't set master reset */
	outb(0x00, iobase+UART_FCR);
	outb(0x07, iobase+UART_FCR);		
	
	val = inb(iobase+UART_RX);
	val = inb(iobase+UART_LSR);
	val = inb(iobase+UART_MSR);
	
	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
}

MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
MODULE_DESCRIPTION("ALi FIR Controller Driver");
MODULE_LICENSE("GPL");


module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "Base I/O addresses");
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ lines");
module_param_array(dma, int, NULL, 0);
MODULE_PARM_DESC(dma, "DMA channels");

module_init(ali_ircc_init);
module_exit(ali_ircc_cleanup);