Add sis900 driver

2005-05-01  Andreas B. Mundt  <andi.mundt@web.de>

	* i386/README-Drivers: Likewise.
	* i386/linux/Makefile.in (linux-net-files): Added 'sis900'.
	* i386/linux/configure.ac (sis900): New driver.
	* linux/dev/drivers/net/Space.c: Add conditional probes 'sis900'
	driver.
	* linux/src/drivers/net/sis900.c: New file.
	* linux/src/drivers/net/sis900.h: Likewise.

5 files changed, 2100 insertions, 0 deletions

diff --git a/linux/Makefrag.am b/linux/Makefrag.am
index 8fd3cc0..52bc890 100644
--- a/linux/Makefrag.am
+++ b/linux/Makefrag.am
@@ -526,6 +526,11 @@ liblinux_a_SOURCES += \
 	linux/src/drivers/net/seeq8005.h
 endif
 
+if device_driver_sis900
+liblinux_a_SOURCES += \
+	linux/src/drivers/net/sis900.c
+endif
+
 if device_driver_sk_g16
 liblinux_a_SOURCES += \
 	linux/src/drivers/net/sk_g16.c \
diff --git a/linux/configfrag.ac b/linux/configfrag.ac
index ff465b2..cf671fc 100644
--- a/linux/configfrag.ac
+++ b/linux/configfrag.ac
@@ -431,6 +431,10 @@ AC_Linux_DRIVER([seeq8005],
   [Ethernet controller Seeq8005],
   [CONFIG_SEEQ8005],
   [net])
+AC_Linux_DRIVER([sis900],
+  [Ethernet controller SiS 900],
+  [CONFIG_SIS900],
+  [net])
 AC_Linux_DRIVER([sk_g16],
   [Ethernet controller Schneider & Koch G16],
   [CONFIG_SK_G16],
diff --git a/linux/dev/drivers/net/Space.c b/linux/dev/drivers/net/Space.c
index db40d0c..213fa9b 100644
--- a/linux/dev/drivers/net/Space.c
+++ b/linux/dev/drivers/net/Space.c
@@ -93,6 +93,7 @@ extern int yellowfin_probe(struct device *);
 extern int eepro100_probe(struct device *);
 extern int epic100_probe(struct device *);
 extern int rtl8139_probe(struct device *);
+extern int sis900_probe(struct device *);
 extern int tlan_probe(struct device *);
 extern int isa515_probe(struct device *);
 extern int pcnet32_probe(struct device *);
@@ -137,6 +138,9 @@ ethif_probe(struct device *dev)
 #ifdef CONFIG_RTL8139
 	&& rtl8139_probe(dev)
 #endif
+#ifdef CONFIG_SIS900
+	&& sis900_probe(dev)
+#endif
 #ifdef CONFIG_VIA_RHINE
 	&& via_rhine_probe(dev)
 #endif
diff --git a/linux/src/drivers/net/sis900.c b/linux/src/drivers/net/sis900.c
new file mode 100644
index 0000000..d9e5f63
--- /dev/null
+++ b/linux/src/drivers/net/sis900.c
@@ -0,0 +1,1803 @@
+/* sis900.c: A SiS 900/7016 PCI Fast Ethernet driver for Linux.
+   Copyright 1999 Silicon Integrated System Corporation
+   Revision:	1.06.11 Apr. 30 2002
+
+   Modified from the driver which is originally written by Donald Becker.
+
+   This software may be used and distributed according to the terms
+   of the GNU Public License (GPL), incorporated herein by reference.
+   Drivers based on this skeleton fall under the GPL and must retain
+   the authorship (implicit copyright) notice.
+
+   References:
+   SiS 7016 Fast Ethernet PCI Bus 10/100 Mbps LAN Controller with OnNow Support,
+   preliminary Rev. 1.0 Jan. 14, 1998
+   SiS 900 Fast Ethernet PCI Bus 10/100 Mbps LAN Single Chip with OnNow Support,
+   preliminary Rev. 1.0 Nov. 10, 1998
+   SiS 7014 Single Chip 100BASE-TX/10BASE-T Physical Layer Solution,
+   preliminary Rev. 1.0 Jan. 18, 1998
+   http://www.sis.com.tw/support/databook.htm
+
+   Rev 1.06.11 Apr. 25 2002 Mufasa Yang (mufasa@sis.com.tw) added SiS962 support
+   Rev 1.06.10 Dec. 18 2001 Hui-Fen Hsu workaround for EDB & RTL8201 PHY
+   Rev 1.06.09 Sep. 28 2001 Hui-Fen Hsu update for 630ET & workaround for ICS1893 PHY
+   Rev 1.06.08 Mar.  2 2001 Hui-Fen Hsu (hfhsu@sis.com.tw) some bug fix & 635M/B support
+   Rev 1.06.07 Jan.  8 2001 Lei-Chun Chang added RTL8201 PHY support
+   Rev 1.06.06 Sep.  6 2000 Lei-Chun Chang added ICS1893 PHY support
+   Rev 1.06.05 Aug. 22 2000 Lei-Chun Chang (lcchang@sis.com.tw) modified 630E equalier workaroung rule
+   Rev 1.06.03 Dec. 23 1999 Ollie Lho Third release
+   Rev 1.06.02 Nov. 23 1999 Ollie Lho bug in mac probing fixed
+   Rev 1.06.01 Nov. 16 1999 Ollie Lho CRC calculation provide by Joseph Zbiciak (im14u2c@primenet.com)
+   Rev 1.06 Nov. 4 1999 Ollie Lho (ollie@sis.com.tw) Second release
+   Rev 1.05.05 Oct. 29 1999 Ollie Lho (ollie@sis.com.tw) Single buffer Tx/Rx
+   Chin-Shan Li (lcs@sis.com.tw) Added AMD Am79c901 HomePNA PHY support
+   Rev 1.05 Aug. 7 1999 Jim Huang (cmhuang@sis.com.tw) Initial release
+*/
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/malloc.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/bios32.h>
+#include <linux/compatmac.h>
+
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <asm/processor.h>	/* Processor type for cache alignment. */
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <asm/types.h>
+#include "sis900.h"
+
+
+#if LINUX_VERSION_CODE < 0x20159
+#define dev_free_skb(skb) dev_kfree_skb (skb, FREE_WRITE);
+#else  /* Grrr, incompatible changes should change the name. */
+#define dev_free_skb(skb) dev_kfree_skb(skb);
+#endif
+
+static const char *version =
+"sis900.c: modified v1.06.11  4/30/2002";
+
+static int max_interrupt_work = 20;
+static int multicast_filter_limit = 128;
+
+#define sis900_debug debug
+static int sis900_debug = 0;
+
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT  (4*HZ)
+
+enum pci_flags_bit {
+  PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
+  PCI_ADDR0=0x10<<0, PCI_ADDR1=0x10<<1, PCI_ADDR2=0x10<<2, PCI_ADDR3=0x10<<3,
+};
+
+struct mac_chip_info {
+  const char *name;
+  u16	vendor_id, device_id, flags;
+  int	io_size;
+  struct device *(*probe) (struct mac_chip_info *mac, long ioaddr, int irq,
+			   int pci_index,  unsigned char pci_device_fn, unsigned char pci_bus, struct device * net_dev);
+};
+static struct device * sis900_mac_probe (struct mac_chip_info * mac, long ioaddr, int irq,
+					 int pci_index,  unsigned char pci_device_fn,
+					 unsigned char pci_bus, struct device * net_dev);
+static struct mac_chip_info  mac_chip_table[] = {
+  { "SiS 900 PCI Fast Ethernet", PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_900,
+    PCI_COMMAND_IO|PCI_COMMAND_MASTER, SIS900_TOTAL_SIZE, sis900_mac_probe},
+  { "SiS 7016 PCI Fast Ethernet",PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7016,
+    PCI_COMMAND_IO|PCI_COMMAND_MASTER, SIS900_TOTAL_SIZE, sis900_mac_probe},
+  {0,},					       /* 0 terminatted list. */
+};
+
+static void sis900_read_mode(struct device *net_dev, int *speed, int *duplex);
+
+static struct mii_chip_info {
+  const char * name;
+  u16 phy_id0;
+  u16 phy_id1;
+  u8  phy_types;
+#define	HOME 	0x0001
+#define LAN	0x0002
+#define MIX	0x0003
+} mii_chip_table[] = {
+  { "SiS 900 Internal MII PHY", 		0x001d, 0x8000, LAN },
+  { "SiS 7014 Physical Layer Solution", 	0x0016, 0xf830, LAN },
+  { "AMD 79C901 10BASE-T PHY",  		0x0000, 0x6B70, LAN },
+  { "AMD 79C901 HomePNA PHY",		0x0000, 0x6B90, HOME},
+  { "ICS LAN PHY",			0x0015, 0xF440, LAN },
+  { "NS  83851 PHY",			0x2000, 0x5C20, MIX },
+  { "Realtek RTL8201 PHY",		0x0000, 0x8200, LAN },
+  {0,},
+};
+
+struct mii_phy {
+  struct mii_phy * next;
+  int phy_addr;
+  u16 phy_id0;
+  u16 phy_id1;
+  u16 status;
+  u8  phy_types;
+};
+
+typedef struct _BufferDesc {
+  u32	link;
+  u32	cmdsts;
+  u32	bufptr;
+} BufferDesc;
+
+struct sis900_private {
+  struct device *next_module;
+  struct enet_statistics stats;
+
+  /*	struct pci_dev * pci_dev;*/
+  unsigned char pci_bus;
+  unsigned char pci_device_fn;
+  int pci_index;
+
+  struct mac_chip_info * mac;
+  struct mii_phy * mii;
+  struct mii_phy * first_mii; /* record the first mii structure */
+  unsigned int cur_phy;
+
+  struct timer_list timer; /* Link status detection timer. */
+  u8     autong_complete; /* 1: auto-negotiate complete  */
+
+  unsigned int cur_rx, dirty_rx;	/* producer/comsumer pointers for Tx/Rx ring */
+  unsigned int cur_tx, dirty_tx;
+
+  /* The saved address of a sent/receive-in-place packet buffer */
+  struct sk_buff *tx_skbuff[NUM_TX_DESC];
+  struct sk_buff *rx_skbuff[NUM_RX_DESC];
+  BufferDesc tx_ring[NUM_TX_DESC];
+  BufferDesc rx_ring[NUM_RX_DESC];
+
+  unsigned int tx_full;		/* The Tx queue is full.    */
+  int LinkOn;
+};
+
+#ifdef MODULE
+#if LINUX_VERSION_CODE > 0x20115
+MODULE_AUTHOR("Jim Huang <cmhuang@sis.com.tw>, Ollie Lho <ollie@sis.com.tw>");
+MODULE_DESCRIPTION("SiS 900 PCI Fast Ethernet driver");
+MODULE_PARM(multicast_filter_limit, "i");
+MODULE_PARM(max_interrupt_work, "i");
+MODULE_PARM(debug, "i");
+#endif
+#endif
+
+static int sis900_open(struct device *net_dev);
+static int sis900_mii_probe (unsigned char pci_bus, unsigned char pci_device_fn, struct device * net_dev);
+static void sis900_init_rxfilter (struct device * net_dev);
+static u16 read_eeprom(long ioaddr, int location);
+static u16 mdio_read(struct device *net_dev, int phy_id, int location);
+static void mdio_write(struct device *net_dev, int phy_id, int location, int val);
+static void sis900_timer(unsigned long data);
+static void sis900_check_mode (struct device *net_dev, struct mii_phy *mii_phy);
+static void sis900_tx_timeout(struct device *net_dev);
+static void sis900_init_tx_ring(struct device *net_dev);
+static void sis900_init_rx_ring(struct device *net_dev);
+static int sis900_start_xmit(struct sk_buff *skb, struct device *net_dev);
+static int sis900_rx(struct device *net_dev);
+static void sis900_finish_xmit (struct device *net_dev);
+static void sis900_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
+static int sis900_close(struct device *net_dev);
+static int mii_ioctl(struct device *net_dev, struct ifreq *rq, int cmd);
+static struct enet_statistics *sis900_get_stats(struct device *net_dev);
+static u16 sis900_compute_hashtable_index(u8 *addr, u8 revision);
+static void set_rx_mode(struct device *net_dev);
+static void sis900_reset(struct device *net_dev);
+static void sis630_set_eq(struct device *net_dev, u8 revision);
+static u16 sis900_default_phy(struct device * net_dev);
+static void sis900_set_capability( struct device *net_dev ,struct mii_phy *phy);
+static u16 sis900_reset_phy(struct device *net_dev, int phy_addr);
+static void sis900_auto_negotiate(struct device *net_dev, int phy_addr);
+static void sis900_set_mode (long ioaddr, int speed, int duplex);
+
+/* A list of all installed SiS900 devices, for removing the driver module. */
+static struct device *root_sis900_dev = NULL;
+
+#ifdef HAVE_DEVLIST
+struct netdev_entry netcard_drv =
+  {"sis900", sis900_probe, SIS900_TOTAL_SIZE, NULL};
+#endif
+
+/* walk through every ethernet PCI devices to see if some of them are matched with our card list*/
+int sis900_probe (struct device * net_dev)
+{
+  int found = 0;
+  int pci_index = 0;
+  unsigned char pci_bus, pci_device_fn;
+  long ioaddr;
+  int irq;
+
+  if (!pcibios_present())
+    return -ENODEV;
+
+  for (; pci_index < 0xff; pci_index++)
+    {
+      u16 vendor, device, pci_command;
+      struct mac_chip_info *mac;
+
+      if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8, pci_index,
+			      &pci_bus, &pci_device_fn) != PCIBIOS_SUCCESSFUL)
+	   break;
+
+      pcibios_read_config_word(pci_bus, pci_device_fn, PCI_VENDOR_ID, &vendor);
+      pcibios_read_config_word(pci_bus, pci_device_fn, PCI_DEVICE_ID, &device);
+
+      for (mac = mac_chip_table; mac->vendor_id; mac++)
+      {
+	  if (vendor == mac->vendor_id && device == mac->device_id) break;
+       }
+
+      /* pci_dev does not match any of our cards */
+      if (mac->vendor_id == 0)
+	continue;
+
+      {
+	u32 pci_ioaddr;
+	u8 pci_irq_line;
+
+	pcibios_read_config_byte(pci_bus, pci_device_fn,
+				 PCI_INTERRUPT_LINE, &pci_irq_line);
+	pcibios_read_config_dword(pci_bus, pci_device_fn,
+				  PCI_BASE_ADDRESS_0, &pci_ioaddr);
+	ioaddr = pci_ioaddr & ~3;
+	irq = pci_irq_line;
+
+	if ((mac->flags & PCI_USES_IO) &&
+	    check_region (pci_ioaddr, mac->io_size))
+	  continue;
+	
+	pcibios_read_config_word(pci_bus, pci_device_fn,
+				 PCI_COMMAND, &pci_command);
+	
+	{
+	  u8 lat;
+	
+	  pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_LATENCY_TIMER, &lat);
+	  if (lat < 16) {
+	    printk("PCI: Increasing latency timer of device %02x:%02x to 64\n",
+		   pci_bus, pci_device_fn);
+	    pcibios_write_config_byte(pci_bus, pci_device_fn, PCI_LATENCY_TIMER, 64);
+	  }
+	}
+	net_dev = mac->probe (mac, ioaddr, irq, pci_index, pci_device_fn, pci_bus, net_dev);
+	if (net_dev != NULL)
+	  {
+	    found++;
+	  }
+	net_dev = NULL;
+      }
+    }
+  return found ? 0 : -ENODEV;
+
+}
+
+/* older SiS900 and friends, use EEPROM to store MAC address */
+static int
+sis900_get_mac_addr(long ioaddr, struct device *net_dev)
+{
+  u16 signature;
+  int i;
+
+  /* check to see if we have sane EEPROM */
+  signature = (u16) read_eeprom(ioaddr, EEPROMSignature);
+  if (signature == 0xffff || signature == 0x0000) {
+ 	printk (KERN_INFO "%s: Error EERPOM read %x\n",
+	 	net_dev->name, signature);	
+ 	return 0;
+  }
+
+  /* get MAC address from EEPROM */
+  for (i = 0; i < 3; i++)
+	  ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
+  return 1;
+}
+
+/* SiS630E model, use APC CMOS RAM to store MAC address */
+static int sis630e_get_mac_addr(long ioaddr, int pci_index, struct device *net_dev)
+{
+  u8 reg;
+  int i;
+  u8 pci_bus, pci_dfn;
+  int not_found;
+
+  not_found = pcibios_find_device(0x1039, 0x0008,
+				  pci_index,
+				  &pci_bus,
+				  &pci_dfn);
+  if (not_found) {
+    printk("%s: Can not find ISA bridge\n", net_dev->name);
+    return 0;
+  }
+  pcibios_read_config_byte(pci_bus, pci_dfn, 0x48, &reg);
+  pcibios_write_config_byte(pci_bus, pci_dfn, 0x48, reg | 0x40);
+
+  for (i = 0; i < 6; i++) {
+    outb(0x09 + i, 0x70);
+    ((u8 *)(net_dev->dev_addr))[i] = inb(0x71);
+  }
+  pcibios_write_config_byte(pci_bus, pci_dfn, 0x48, reg & ~0x40);
+
+  return 1;
+}
+
+/* 635 model : set Mac reload bit and get mac address from rfdr */
+static int sis635_get_mac_addr(struct device *net_dev)
+{
+  long ioaddr = net_dev->base_addr;
+  u32 rfcrSave;
+  u32 i;
+
+  rfcrSave = inl(rfcr + ioaddr);
+
+  outl(rfcrSave | RELOAD, ioaddr + cr);
+  outl(0, ioaddr + cr);
+
+  /* disable packet filtering before setting filter */
+  outl(rfcrSave & ~RFEN, rfcr + ioaddr);
+
+  /* load MAC addr to filter data register */
+  for (i = 0 ; i < 3 ; i++) {
+    outl((i << RFADDR_shift), ioaddr + rfcr);
+    *( ((u16 *)net_dev->dev_addr) + i) = inw(ioaddr + rfdr);
+  }
+
+  /* enable packet filitering */
+  outl(rfcrSave | RFEN, rfcr + ioaddr);
+
+  return 1;
+}
+
+
+/**
+ *	sis962_get_mac_addr: - Get MAC address for SiS962 model
+ *	@pci_dev: the sis900 pci device
+ *	@net_dev: the net device to get address for
+ *
+ *	SiS962 model, use EEPROM to store MAC address. And EEPROM is shared by
+ *	LAN and 1394. When access EEPROM, send EEREQ signal to hardware first
+ *	and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be access
+ *	by LAN, otherwise is not. After MAC address is read from EEPROM, send
+ *	EEDONE signal to refuse EEPROM access by LAN.
+ *	MAC address is read into @net_dev->dev_addr.
+ */
+
+static int sis962_get_mac_addr(struct device *net_dev)
+{
+  long ioaddr = net_dev->base_addr;
+  long ee_addr = ioaddr + mear;
+  u32 waittime = 0;
+  int i;
+	
+  outl(EEREQ, ee_addr);
+  while(waittime < 2000) {
+    	if(inl(ee_addr) & EEGNT) {
+		/* get MAC address from EEPROM */
+                for (i = 0; i < 3; i++)
+                        ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
+                outl(EEDONE, ee_addr);
+                return 1;
+        } else {
+    		udelay(1);	
+    		waittime ++;
+    	}
+  }
+  outl(EEDONE, ee_addr);
+  return 0;
+}
+
+struct device *
+sis900_mac_probe (struct mac_chip_info *mac, long ioaddr, int irq, int pci_index,
+		  unsigned char pci_device_fn, unsigned char pci_bus, struct device * net_dev)
+{
+  struct sis900_private *sis_priv;
+  static int did_version = 0;
+
+  u8 revision;
+  int i, ret = 0;
+
+  if (did_version++ == 0)
+    printk(KERN_INFO "%s\n", version);
+
+  if ((net_dev = init_etherdev(net_dev, 0)) == NULL)
+    return NULL;
+
+  if ((net_dev->priv = kmalloc(sizeof(struct sis900_private), GFP_KERNEL)) == NULL) {
+    unregister_netdev(net_dev);
+    return NULL;
+  }
+
+  sis_priv = net_dev->priv;
+  memset(sis_priv, 0, sizeof(struct sis900_private));
+
+  /* We do a request_region() to register /proc/ioports info. */
+  request_region(ioaddr, mac->io_size, net_dev->name);
+  net_dev->base_addr = ioaddr;
+  net_dev->irq = irq;
+
+  sis_priv->mac = mac;
+  sis_priv->pci_bus = pci_bus;
+  sis_priv->pci_device_fn = pci_device_fn;
+  sis_priv->pci_index = pci_index;
+
+  pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_CLASS_REVISION, &revision);
+
+  if ( revision == SIS630E_900_REV )
+    ret = sis630e_get_mac_addr(ioaddr, pci_index, net_dev);
+  else if ((revision > 0x81) && (revision <= 0x90))
+    ret = sis635_get_mac_addr(net_dev);
+  else if (revision == SIS962_900_REV)
+    ret = sis962_get_mac_addr(net_dev);
+  else
+    ret = sis900_get_mac_addr(ioaddr, net_dev);
+
+  if (ret == 0) {
+    unregister_netdev(net_dev);
+    return NULL;
+  }
+
+  /* print some information about our NIC */
+  printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ", net_dev->name, mac->name,
+	 ioaddr, irq);
+  for (i = 0; i < 5; i++)
+    printk("%2.2x:", (u8)net_dev->dev_addr[i]);
+  printk("%2.2x.\n", net_dev->dev_addr[i]);
+
+  /* 630ET : set the mii access mode as software-mode */
+  if (revision == SIS630ET_900_REV)
+    outl(ACCESSMODE | inl(ioaddr + cr), ioaddr + cr);
+
+  /* probe for mii transceiver */
+  if (sis900_mii_probe(pci_bus, pci_device_fn, net_dev) == 0) {
+    unregister_netdev(net_dev);
+    kfree(sis_priv);
+    release_region(ioaddr, mac->io_size);
+    return NULL;
+  }
+
+  sis_priv->next_module = root_sis900_dev;
+  root_sis900_dev = net_dev;
+
+  /* The SiS900-specific entries in the device structure. */
+  net_dev->open = &sis900_open;
+  net_dev->hard_start_xmit = &sis900_start_xmit;
+  net_dev->stop = &sis900_close;
+  net_dev->get_stats = &sis900_get_stats;
+  net_dev->set_multicast_list = &set_rx_mode;
+  net_dev->do_ioctl = &mii_ioctl;
+
+  return net_dev;
+}
+
+/* sis900_mii_probe: - Probe MII PHY for sis900 */
+static int sis900_mii_probe (unsigned char pci_bus, unsigned char pci_device_fn, struct device * net_dev)
+{
+  struct sis900_private * sis_priv = (struct sis900_private *)net_dev->priv;
+  u16 poll_bit = MII_STAT_LINK, status = 0;
+  unsigned int timeout = jiffies + 5 * HZ;
+  int phy_addr;
+  u8 revision;
+
+  sis_priv->mii = NULL;
+
+  /* search for total of 32 possible mii phy addresses */
+  for (phy_addr = 0; phy_addr < 32; phy_addr++) {	
+    struct mii_phy * mii_phy = NULL;
+    u16 mii_status;
+    int i;
+
+    for(i=0; i<2; i++)
+      mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+    if (mii_status == 0xffff || mii_status == 0x0000)
+      /* the mii is not accessable, try next one */
+      continue;
+		
+    if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
+      printk(KERN_INFO "Cannot allocate mem for struct mii_phy\n");
+      return 0;
+    }
+		
+    mii_phy->phy_id0 = mdio_read(net_dev, phy_addr, MII_PHY_ID0);
+    mii_phy->phy_id1 = mdio_read(net_dev, phy_addr, MII_PHY_ID1);		
+    mii_phy->phy_addr = phy_addr;
+    mii_phy->status = mii_status;
+    mii_phy->next = sis_priv->mii;
+    sis_priv->mii = mii_phy;
+    sis_priv->first_mii = mii_phy;
+
+    for (i=0; mii_chip_table[i].phy_id1; i++)
+      if ( ( mii_phy->phy_id0 == mii_chip_table[i].phy_id0 ) &&
+	   ( (mii_phy->phy_id1 & 0xFFF0) == mii_chip_table[i].phy_id1 )){
+
+	mii_phy->phy_types = mii_chip_table[i].phy_types;
+	if(mii_chip_table[i].phy_types == MIX)
+	  mii_phy->phy_types =
+	    (mii_status & (MII_STAT_CAN_TX_FDX | MII_STAT_CAN_TX))?LAN:HOME;
+	printk(KERN_INFO "%s: %s transceiver found at address %d.\n",
+	       net_dev->name, mii_chip_table[i].name, phy_addr);
+	break;
+      }
+
+    if( !mii_chip_table[i].phy_id1 )
+      printk(KERN_INFO "%s: Unknown PHY transceiver found at address %d.\n",
+	     net_dev->name, phy_addr);
+  }
+	
+  if (sis_priv->mii == NULL) {
+    printk(KERN_INFO "%s: No MII transceivers found!\n",
+	   net_dev->name);
+    return 0;
+  }
+
+  /* Slect Default PHY to put in sis_priv->mii & sis_priv->cur_phy */
+  sis_priv->mii = NULL;
+  sis900_default_phy( net_dev );
+
+  /* Reset PHY if default PHY is internal sis900 */
+  if( (sis_priv->mii->phy_id0 == 0x001D) &&
+      ( (sis_priv->mii->phy_id1&0xFFF0) == 0x8000) )
+    status = sis900_reset_phy( net_dev,  sis_priv->cur_phy );
+
+  /* workaround for ICS1893 PHY */
+  if ((sis_priv->mii->phy_id0 == 0x0015) &&
+      ((sis_priv->mii->phy_id1&0xFFF0) == 0xF440))
+    mdio_write(net_dev, sis_priv->cur_phy, 0x0018, 0xD200);
+
+  if( status & MII_STAT_LINK ){
+    while (poll_bit)
+      {
+        poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
+        if (jiffies >= timeout)
+          {
+            printk(KERN_WARNING "%s: reset phy and link down now\n", net_dev->name);
+            return -ETIME;
+          }
+       }
+  }
+	
+	pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_CLASS_REVISION, &revision);
+	if (revision == SIS630E_900_REV) {
+		/* SiS 630E has some bugs on default value of PHY registers */
+		mdio_write(net_dev, sis_priv->cur_phy, MII_ANADV, 0x05e1);
+		mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG1, 0x22);
+		mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG2, 0xff00);
+		mdio_write(net_dev, sis_priv->cur_phy, MII_MASK, 0xffc0);
+		//mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, 0x1000);	
+	}
+
+	if (sis_priv->mii->status & MII_STAT_LINK)
+		sis_priv->LinkOn = TRUE;
+	else
+		sis_priv->LinkOn = FALSE;
+
+	return 1;
+}
+
+
+/* sis900_default_phy : Select one default PHY for sis900 mac */
+static u16 sis900_default_phy(struct device * net_dev)
+{
+	struct sis900_private * sis_priv = (struct sis900_private *)net_dev->priv;
+ 	struct mii_phy *phy = NULL, *phy_home = NULL, *default_phy = NULL;
+	u16 status;
+
+        for( phy=sis_priv->first_mii; phy; phy=phy->next ){
+		status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
+		status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
+
+		/* Link ON & Not select deafalut PHY */
+		 if ( (status & MII_STAT_LINK) && !(default_phy) )
+		 	default_phy = phy;
+		 else{
+			status = mdio_read(net_dev, phy->phy_addr, MII_CONTROL);
+			mdio_write(net_dev, phy->phy_addr, MII_CONTROL,
+				status | MII_CNTL_AUTO | MII_CNTL_ISOLATE);
+			if( phy->phy_types == HOME )
+				phy_home = phy;
+		 }
+	}
+
+	if( (!default_phy) && phy_home )
+		default_phy = phy_home;
+	else if(!default_phy)
+		default_phy = sis_priv->first_mii;
+
+	if( sis_priv->mii != default_phy ){
+		sis_priv->mii = default_phy;
+		sis_priv->cur_phy = default_phy->phy_addr;
+		printk(KERN_INFO "%s: Using transceiver found at address %d as default\n", net_dev->name,sis_priv->cur_phy);
+	}
+	
+	status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
+	status &= (~MII_CNTL_ISOLATE);
+
+	mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, status);	
+	status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
+	status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
+
+	return status;	
+}
+
+
+/* sis900_set_capability : set the media capability of network adapter */
+static void sis900_set_capability( struct device *net_dev , struct mii_phy *phy )
+{
+	u16 cap;
+	u16 status;
+	
+	status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
+	status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
+	
+	cap = MII_NWAY_CSMA_CD |
+		((phy->status & MII_STAT_CAN_TX_FDX)? MII_NWAY_TX_FDX:0) |
+		((phy->status & MII_STAT_CAN_TX)    ? MII_NWAY_TX:0) |
+		((phy->status & MII_STAT_CAN_T_FDX) ? MII_NWAY_T_FDX:0)|
+		((phy->status & MII_STAT_CAN_T)     ? MII_NWAY_T:0);
+
+	mdio_write( net_dev, phy->phy_addr, MII_ANADV, cap );
+}
+
+
+/* Delay between EEPROM clock transitions. */
+#define eeprom_delay()	inl(ee_addr)
+
+/* Read Serial EEPROM through EEPROM Access Register, Note that location is
+   in word (16 bits) unit */
+static u16 read_eeprom(long ioaddr, int location)
+{
+	int i;
+	u16 retval = 0;
+	long ee_addr = ioaddr + mear;
+	u32 read_cmd = location | EEread;
+
+	outl(0, ee_addr);
+	eeprom_delay();
+	outl(EECS, ee_addr);
+	eeprom_delay();
+
+	/* Shift the read command (9) bits out. */
+	for (i = 8; i >= 0; i--) {
+		u32 dataval = (read_cmd & (1 << i)) ? EEDI | EECS : EECS;
+		outl(dataval, ee_addr);
+		eeprom_delay();
+		outl(dataval | EECLK, ee_addr);
+		eeprom_delay();
+	}
+	outb(EECS, ee_addr);
+	eeprom_delay();
+
+	/* read the 16-bits data in */
+	for (i = 16; i > 0; i--) {
+		outl(EECS, ee_addr);
+		eeprom_delay();
+		outl(EECS | EECLK, ee_addr);
+		eeprom_delay();
+		retval = (retval << 1) | ((inl(ee_addr) & EEDO) ? 1 : 0);
+		eeprom_delay();
+	}
+
+	/* Terminate the EEPROM access. */
+	outl(0, ee_addr);
+	eeprom_delay();
+//	outl(EECLK, ee_addr);
+
+	return (retval);
+}
+
+/* Read and write the MII management registers using software-generated
+   serial MDIO protocol. Note that the command bits and data bits are
+   send out seperately */
+#define mdio_delay()	inl(mdio_addr)
+
+static void mdio_idle(long mdio_addr)
+{
+	outl(MDIO | MDDIR, mdio_addr);
+	mdio_delay();
+	outl(MDIO | MDDIR | MDC, mdio_addr);
+}
+
+/* Syncronize the MII management interface by shifting 32 one bits out. */
+static void mdio_reset(long mdio_addr)
+{
+	int i;
+
+	for (i = 31; i >= 0; i--) {
+		outl(MDDIR | MDIO, mdio_addr);
+		mdio_delay();
+		outl(MDDIR | MDIO | MDC, mdio_addr);
+		mdio_delay();
+	}
+	return;
+}
+
+static u16 mdio_read(struct device *net_dev, int phy_id, int location)
+{
+	long mdio_addr = net_dev->base_addr + mear;
+	int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
+	u16 retval = 0;
+	int i;
+
+	mdio_reset(mdio_addr);
+	mdio_idle(mdio_addr);
+
+	for (i = 15; i >= 0; i--) {
+		int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
+		outl(dataval, mdio_addr);
+		mdio_delay();
+		outl(dataval | MDC, mdio_addr);
+		mdio_delay();
+	}
+
+	/* Read the 16 data bits. */
+	for (i = 16; i > 0; i--) {
+		outl(0, mdio_addr);
+		mdio_delay();
+		retval = (retval << 1) | ((inl(mdio_addr) & MDIO) ? 1 : 0);
+		outl(MDC, mdio_addr);
+		mdio_delay();
+	}
+	outl(0x00, mdio_addr);
+
+	return retval;
+}
+
+static void mdio_write(struct device *net_dev, int phy_id, int location, int value)
+{
+	long mdio_addr = net_dev->base_addr + mear;
+	int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
+	int i;
+
+	mdio_reset(mdio_addr);
+	mdio_idle(mdio_addr);
+
+	/* Shift the command bits out. */
+	for (i = 15; i >= 0; i--) {
+		int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
+		outb(dataval, mdio_addr);
+		mdio_delay();
+		outb(dataval | MDC, mdio_addr);
+		mdio_delay();
+	}
+	mdio_delay();
+
+	/* Shift the value bits out. */
+	for (i = 15; i >= 0; i--) {
+		int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
+		outl(dataval, mdio_addr);
+		mdio_delay();
+		outl(dataval | MDC, mdio_addr);
+		mdio_delay();
+	}
+	mdio_delay();
+
+	/* Clear out extra bits. */
+	for (i = 2; i > 0; i--) {
+		outb(0, mdio_addr);
+		mdio_delay();
+		outb(MDC, mdio_addr);
+		mdio_delay();
+	}
+	outl(0x00, mdio_addr);
+
+	return;
+}
+
+static u16 sis900_reset_phy(struct device *net_dev, int phy_addr)
+{
+	int i = 0;
+	u16 status;
+
+	while (i++ < 2)
+		status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+	mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
+	
+	return status;
+}
+
+static int
+sis900_open(struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	u8 revision;
+
+	/* Soft reset the chip. */
+	sis900_reset(net_dev);
+	
+	/* Equalizer workaroung Rule */
+	pcibios_read_config_byte(sis_priv->pci_bus, sis_priv->pci_device_fn, PCI_CLASS_REVISION, &revision);
+	sis630_set_eq(net_dev, revision);
+	
+	if (request_irq(net_dev->irq, &sis900_interrupt, SA_SHIRQ, net_dev->name, net_dev)) {
+		return -EAGAIN;
+	}
+
+	MOD_INC_USE_COUNT;
+
+	sis900_init_rxfilter(net_dev);
+
+	sis900_init_tx_ring(net_dev);
+	sis900_init_rx_ring(net_dev);
+
+	set_rx_mode(net_dev);
+
+	net_dev->tbusy = 0;
+	net_dev->interrupt = 0;
+	net_dev->start = 1;
+
+	/* Workaround for EDB */
+	sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
+
+	/* Enable all known interrupts by setting the interrupt mask. */
+	outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
+	outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
+	outl(IE, ioaddr + ier);
+
+	sis900_check_mode(net_dev, sis_priv->mii);
+
+	/* Set the timer to switch to check for link beat and perhaps switch
+	   to an alternate media type. */
+	init_timer(&sis_priv->timer);
+	sis_priv->timer.expires = jiffies + HZ;
+	sis_priv->timer.data = (unsigned long)net_dev;
+	sis_priv->timer.function = &sis900_timer;
+	add_timer(&sis_priv->timer);
+
+	return 0;
+}
+
+/* set receive filter address to our MAC address */
+static void
+sis900_init_rxfilter (struct device * net_dev)
+{
+	long ioaddr = net_dev->base_addr;
+	u32 rfcrSave;
+	u32 i;
+
+	rfcrSave = inl(rfcr + ioaddr);
+
+	/* disable packet filtering before setting filter */
+	outl(rfcrSave & ~RFEN, rfcr + ioaddr);
+
+	/* load MAC addr to filter data register */
+	for (i = 0 ; i < 3 ; i++) {
+		u32 w;
+
+		w = (u32) *((u16 *)(net_dev->dev_addr)+i);
+		outl((i << RFADDR_shift), ioaddr + rfcr);
+		outl(w, ioaddr + rfdr);
+
+		if (sis900_debug > 2) {
+			printk(KERN_INFO "%s: Receive Filter Addrss[%d]=%x\n",
+			       net_dev->name, i, inl(ioaddr + rfdr));
+		}
+	}
+
+	/* enable packet filitering */
+	outl(rfcrSave | RFEN, rfcr + ioaddr);
+}
+
+/* Initialize the Tx ring. */
+static void
+sis900_init_tx_ring(struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	int i;
+
+	sis_priv->tx_full = 0;
+	sis_priv->dirty_tx = sis_priv->cur_tx = 0;
+
+	for (i = 0; i < NUM_TX_DESC; i++) {
+		sis_priv->tx_skbuff[i] = NULL;
+
+		sis_priv->tx_ring[i].link = (u32) virt_to_bus(&sis_priv->tx_ring[i+1]);
+		sis_priv->tx_ring[i].cmdsts = 0;
+		sis_priv->tx_ring[i].bufptr = 0;
+	}
+	sis_priv->tx_ring[i-1].link = (u32) virt_to_bus(&sis_priv->tx_ring[0]);
+
+	/* load Transmit Descriptor Register */
+	outl(virt_to_bus(&sis_priv->tx_ring[0]), ioaddr + txdp);
+	if (sis900_debug > 2)
+		printk(KERN_INFO "%s: TX descriptor register loaded with: %8.8x\n",
+		       net_dev->name, inl(ioaddr + txdp));
+}
+
+/* Initialize the Rx descriptor ring, pre-allocate recevie buffers */
+static void
+sis900_init_rx_ring(struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	int i;
+
+	sis_priv->cur_rx = 0;
+	sis_priv->dirty_rx = 0;
+
+	/* init RX descriptor */
+	for (i = 0; i < NUM_RX_DESC; i++) {
+		sis_priv->rx_skbuff[i] = NULL;
+
+		sis_priv->rx_ring[i].link = (u32) virt_to_bus(&sis_priv->rx_ring[i+1]);
+		sis_priv->rx_ring[i].cmdsts = 0;
+		sis_priv->rx_ring[i].bufptr = 0;
+	}
+	sis_priv->rx_ring[i-1].link = (u32) virt_to_bus(&sis_priv->rx_ring[0]);
+
+	/* allocate sock buffers */
+	for (i = 0; i < NUM_RX_DESC; i++) {
+		struct sk_buff *skb;
+
+		if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
+			/* not enough memory for skbuff, this makes a "hole"
+			   on the buffer ring, it is not clear how the
+			   hardware will react to this kind of degenerated
+			   buffer */
+			break;
+		}
+		skb->dev = net_dev;
+		sis_priv->rx_skbuff[i] = skb;
+		sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
+		sis_priv->rx_ring[i].bufptr = virt_to_bus(skb->tail);
+	}
+	sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
+
+	/* load Receive Descriptor Register */
+	outl(virt_to_bus(&sis_priv->rx_ring[0]), ioaddr + rxdp);
+	if (sis900_debug > 2)
+		printk(KERN_INFO "%s: RX descriptor register loaded with: %8.8x\n",
+		       net_dev->name, inl(ioaddr + rxdp));
+}
+
+/**
+ *	sis630_set_eq: - set phy equalizer value for 630 LAN
+ *	@net_dev: the net device to set equalizer value
+ *	@revision: 630 LAN revision number
+ *
+ *	630E equalizer workaround rule(Cyrus Huang 08/15)
+ *	PHY register 14h(Test)
+ *	Bit 14: 0 -- Automatically dectect (default)
+ *		1 -- Manually set Equalizer filter
+ *	Bit 13: 0 -- (Default)
+ *		1 -- Speed up convergence of equalizer setting
+ *	Bit 9 : 0 -- (Default)
+ *		1 -- Disable Baseline Wander
+ *	Bit 3~7   -- Equalizer filter setting
+ *	Link ON: Set Bit 9, 13 to 1, Bit 14 to 0
+ *	Then calculate equalizer value
+ *	Then set equalizer value, and set Bit 14 to 1, Bit 9 to 0
+ *	Link Off:Set Bit 13 to 1, Bit 14 to 0
+ *	Calculate Equalizer value:
+ *	When Link is ON and Bit 14 is 0, SIS900PHY will auto-dectect proper equalizer value.
+ *	When the equalizer is stable, this value is not a fixed value. It will be within
+ *	a small range(eg. 7~9). Then we get a minimum and a maximum value(eg. min=7, max=9)
+ *	0 <= max <= 4  --> set equalizer to max
+ *	5 <= max <= 14 --> set equalizer to max+1 or set equalizer to max+2 if max == min
+ *	max >= 15      --> set equalizer to max+5 or set equalizer to max+6 if max == min
+ */
+
+static void sis630_set_eq(struct device *net_dev, u8 revision)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	u16 reg14h, eq_value, max_value=0, min_value=0;
+	u8 host_bridge_rev;
+	int i, maxcount=10;
+	int not_found;
+	u8 pci_bus, pci_device_fn;
+
+	if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
+	       revision == SIS630A_900_REV || revision ==  SIS630ET_900_REV) )
+		return;
+	not_found = pcibios_find_device(SIS630_VENDOR_ID, SIS630_DEVICE_ID,
+					sis_priv->pci_index,
+					&pci_bus,
+					&pci_device_fn);
+	if (not_found)
+	    pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_CLASS_REVISION, &host_bridge_rev);
+
+	if (sis_priv->LinkOn) {
+		reg14h=mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
+		mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, (0x2200 | reg14h) & 0xBFFF);
+		for (i=0; i < maxcount; i++) {
+			eq_value=(0x00F8 & mdio_read(net_dev, sis_priv->cur_phy, MII_RESV)) >> 3;
+			if (i == 0)
+				max_value=min_value=eq_value;
+			max_value=(eq_value > max_value) ? eq_value : max_value;
+			min_value=(eq_value < min_value) ? eq_value : min_value;
+		}
+		/* 630E rule to determine the equalizer value */
+		if (revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
+		    revision == SIS630ET_900_REV) {
+			if (max_value < 5)
+				eq_value=max_value;
+			else if (max_value >= 5 && max_value < 15)
+				eq_value=(max_value == min_value) ? max_value+2 : max_value+1;
+			else if (max_value >= 15)
+				eq_value=(max_value == min_value) ? max_value+6 : max_value+5;
+		}
+		/* 630B0&B1 rule to determine the equalizer value */
+		if (revision == SIS630A_900_REV &&
+		    (host_bridge_rev == SIS630B0 || host_bridge_rev == SIS630B1)) {
+			if (max_value == 0)
+				eq_value=3;
+			else
+				eq_value=(max_value+min_value+1)/2;
+		}
+		/* write equalizer value and setting */
+		reg14h=mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
+		reg14h=(reg14h & 0xFF07) | ((eq_value << 3) & 0x00F8);
+		reg14h=(reg14h | 0x6000) & 0xFDFF;
+		mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, reg14h);
+	}
+	else {
+		reg14h=mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
+		if (revision == SIS630A_900_REV &&
+		    (host_bridge_rev == SIS630B0 || host_bridge_rev == SIS630B1))
+			mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, (reg14h | 0x2200) & 0xBFFF);
+		else
+			mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, (reg14h | 0x2000) & 0xBFFF);
+	}
+	return;
+}
+
+
+/* on each timer ticks we check two things, Link Status (ON/OFF) and
+   Link Mode (10/100/Full/Half)
+*/
+static void sis900_timer(unsigned long data)
+{
+	struct device *net_dev = (struct device *)data;
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	struct mii_phy *mii_phy = sis_priv->mii;
+	static int next_tick = 5*HZ;
+	u16 status;
+	u8 revision;
+
+	if(!sis_priv->autong_complete){
+		int speed, duplex = 0;
+
+		sis900_read_mode(net_dev, &speed, &duplex);
+		if(duplex){
+			sis900_set_mode(net_dev->base_addr, speed, duplex);
+			pcibios_read_config_byte(sis_priv->pci_bus, sis_priv->pci_device_fn, PCI_CLASS_REVISION, &revision);
+			sis630_set_eq(net_dev, revision);
+		}
+		
+		sis_priv->timer.expires = jiffies + HZ;
+		add_timer(&sis_priv->timer);
+		return;
+	}
+
+	status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
+	status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
+
+	/* Link OFF -> ON */
+	if ( !sis_priv->LinkOn ) {
+LookForLink:
+		/* Search for new PHY */
+		status = sis900_default_phy( net_dev );
+		mii_phy = sis_priv->mii;
+
+		if( status & MII_STAT_LINK ){
+			sis900_check_mode(net_dev, mii_phy);
+			sis_priv->LinkOn = TRUE;
+		}
+	}
+	/* Link ON -> OFF */
+	else{
+                if( !(status & MII_STAT_LINK) ){
+			sis_priv->LinkOn = FALSE;
+                	printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
+
+                	/* Change mode issue */
+                	if( (mii_phy->phy_id0 == 0x001D) &&
+                	  ( (mii_phy->phy_id1 & 0xFFF0) == 0x8000 ))
+               			sis900_reset_phy( net_dev,  sis_priv->cur_phy );
+
+                	pcibios_read_config_byte(sis_priv->pci_bus, sis_priv->pci_device_fn, PCI_CLASS_REVISION, &revision);
+			sis630_set_eq(net_dev, revision);
+
+                	goto LookForLink;
+                }
+	}
+
+	sis_priv->timer.expires = jiffies + next_tick;
+	add_timer(&sis_priv->timer);
+}
+
+static void sis900_check_mode (struct device *net_dev, struct mii_phy *mii_phy)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	int speed, duplex;
+
+	if( mii_phy->phy_types == LAN  ){
+		outl( ~EXD & inl( ioaddr + cfg ), ioaddr + cfg);
+		sis900_set_capability(net_dev , mii_phy);
+		sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
+	}else{
+		outl(EXD | inl( ioaddr + cfg ), ioaddr + cfg);
+		speed = HW_SPEED_HOME;
+		duplex = FDX_CAPABLE_HALF_SELECTED;
+		sis900_set_mode(net_dev->base_addr, speed, duplex);
+		sis_priv->autong_complete = 1;
+	}
+}
+
+static void sis900_set_mode (long ioaddr, int speed, int duplex)
+{
+	u32 tx_flags = 0, rx_flags = 0;
+
+	if( inl(ioaddr + cfg) & EDB_MASTER_EN ){
+		tx_flags = TxATP | (DMA_BURST_64 << TxMXDMA_shift) | (TX_FILL_THRESH << TxFILLT_shift);
+		rx_flags = DMA_BURST_64 << RxMXDMA_shift;
+	}
+	else{
+		tx_flags = TxATP | (DMA_BURST_512 << TxMXDMA_shift) | (TX_FILL_THRESH << TxFILLT_shift);
+		rx_flags = DMA_BURST_512 << RxMXDMA_shift;
+	}
+
+	if (speed == HW_SPEED_HOME || speed == HW_SPEED_10_MBPS ) {
+		rx_flags |= (RxDRNT_10 << RxDRNT_shift);
+		tx_flags |= (TxDRNT_10 << TxDRNT_shift);
+	}
+	else {
+		rx_flags |= (RxDRNT_100 << RxDRNT_shift);
+		tx_flags |= (TxDRNT_100 << TxDRNT_shift);
+	}
+
+	if (duplex == FDX_CAPABLE_FULL_SELECTED) {
+		tx_flags |= (TxCSI | TxHBI);
+		rx_flags |= RxATX;
+	}
+
+	outl (tx_flags, ioaddr + txcfg);
+	outl (rx_flags, ioaddr + rxcfg);
+}
+
+
+static void sis900_auto_negotiate(struct device *net_dev, int phy_addr)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	int i = 0;
+	u32 status;
+	
+	while (i++ < 2)
+		status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+	if (!(status & MII_STAT_LINK)){
+		printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
+		sis_priv->autong_complete = 1;
+		sis_priv->LinkOn = FALSE;
+		return;
+	}
+
+	/* (Re)start AutoNegotiate */
+	mdio_write(net_dev, phy_addr, MII_CONTROL,
+			MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
+	sis_priv->autong_complete = 0;
+}
+
+
+static void sis900_read_mode(struct device *net_dev, int *speed, int *duplex)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	struct mii_phy *phy = sis_priv->mii;
+	int phy_addr = sis_priv->cur_phy;
+	u32 status;
+	u16 autoadv, autorec;
+	int i = 0;
+
+	while (i++ < 2)
+		status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+	if (!(status & MII_STAT_LINK))	return;
+	
+	/* AutoNegotiate completed */
+	autoadv = mdio_read(net_dev, phy_addr, MII_ANADV);
+	autorec = mdio_read(net_dev, phy_addr, MII_ANLPAR);
+	status = autoadv & autorec;
+
+	*speed = HW_SPEED_10_MBPS;
+	*duplex = FDX_CAPABLE_HALF_SELECTED;
+
+	if (status & (MII_NWAY_TX | MII_NWAY_TX_FDX))
+		*speed = HW_SPEED_100_MBPS;
+	if (status & ( MII_NWAY_TX_FDX | MII_NWAY_T_FDX))
+		*duplex = FDX_CAPABLE_FULL_SELECTED;
+
+	sis_priv->autong_complete = 1;
+
+	/* Workaround for Realtek RTL8201 PHY issue */
+	if((phy->phy_id0 == 0x0000) && ((phy->phy_id1 & 0xFFF0) == 0x8200)){
+		if(mdio_read(net_dev, phy_addr, MII_CONTROL) & MII_CNTL_FDX)
+			*duplex = FDX_CAPABLE_FULL_SELECTED;
+		if(mdio_read(net_dev, phy_addr, 0x0019) & 0x01)
+			*speed = HW_SPEED_100_MBPS;
+	}
+			
+	printk(KERN_INFO "%s: Media Link On %s %s-duplex \n",
+	       net_dev->name,
+	       *speed == HW_SPEED_100_MBPS ?
+	       "100mbps" : "10mbps",
+	       *duplex == FDX_CAPABLE_FULL_SELECTED ?
+	       "full" : "half");
+}
+
+
+static void sis900_tx_timeout(struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	int i;
+
+	printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x \n",
+	       net_dev->name, inl(ioaddr + cr), inl(ioaddr + isr));
+
+	/* Disable interrupts by clearing the interrupt mask. */
+	outl(0x0000, ioaddr + imr);
+
+	/* discard unsent packets, should this code section be protected by
+	   cli(), sti() ?? */
+	sis_priv->dirty_tx = sis_priv->cur_tx = 0;
+	for (i = 0; i < NUM_TX_DESC; i++) {
+		if (sis_priv->tx_skbuff[i] != NULL) {
+			dev_free_skb(sis_priv->tx_skbuff[i]);
+			sis_priv->tx_skbuff[i] = 0;
+			sis_priv->tx_ring[i].cmdsts = 0;
+			sis_priv->tx_ring[i].bufptr = 0;
+			sis_priv->stats.tx_dropped++;
+		}
+	}
+	net_dev->trans_start = jiffies;
+	net_dev->tbusy = sis_priv->tx_full = 0;
+
+	/* FIXME: Should we restart the transmission thread here  ?? */
+	outl(TxENA | inl(ioaddr + cr), ioaddr + cr);
+
+	/* Enable all known interrupts by setting the interrupt mask. */
+	outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
+	return;
+}
+
+static int
+sis900_start_xmit(struct sk_buff *skb, struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	unsigned int  entry;
+
+	/* test tbusy to see if we have timeout situation then set it */
+	if (test_and_set_bit(0, (void*)&net_dev->tbusy) != 0) {
+		if (jiffies - net_dev->trans_start > TX_TIMEOUT)
+			sis900_tx_timeout(net_dev);
+		return 1;
+	}
+
+	/* Calculate the next Tx descriptor entry. */
+	entry = sis_priv->cur_tx % NUM_TX_DESC;
+	sis_priv->tx_skbuff[entry] = skb;
+
+	/* set the transmit buffer descriptor and enable Transmit State Machine */
+	sis_priv->tx_ring[entry].bufptr = virt_to_bus(skb->data);
+	sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len);
+	outl(TxENA | inl(ioaddr + cr), ioaddr + cr);
+
+	if (++sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC) {
+		/* Typical path, clear tbusy to indicate more
+		   transmission is possible */
+		clear_bit(0, (void*)&net_dev->tbusy);
+	} else {
+		/* no more transmit descriptor avaiable, tbusy remain set */
+		sis_priv->tx_full = 1;
+	}
+
+	net_dev->trans_start = jiffies;
+	
+	{
+	  int i;
+	  for (i = 0; i < 100000; i++); /* GRUIIIIIK */
+	}
+	
+	if (sis900_debug > 3)
+		printk(KERN_INFO "%s: Queued Tx packet at %p size %d "
+		       "to slot %d.\n",
+		       net_dev->name, skb->data, (int)skb->len, entry);
+
+	return 0;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+   after the Tx thread. */
+static void sis900_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct device *net_dev = (struct device *)dev_instance;
+	int boguscnt = max_interrupt_work;
+	long ioaddr = net_dev->base_addr;
+	u32 status;
+
+#if defined(__i386__)
+	/* A lock to prevent simultaneous entry bug on Intel SMP machines. */
+	if (test_and_set_bit(0, (void*)&net_dev->interrupt)) {
+		printk(KERN_INFO "%s: SMP simultaneous entry of "
+		       "an interrupt handler.\n", net_dev->name);
+		net_dev->interrupt = 0;		/* Avoid halting machine. */
+		return;
+	}
+#else
+	if (net_dev->interrupt) {
+		printk(KERN_INFO "%s: Re-entering the interrupt handler.\n",
+		       net_dev->name);
+		return;
+	}
+	net_dev->interrupt = 1;
+#endif
+
+	do {
+		status = inl(ioaddr + isr);
+
+		if ((status & (HIBERR|TxURN|TxERR|TxIDLE|RxORN|RxERR|RxOK)) == 0)
+			/* nothing intresting happened */
+			break;
+
+		/* why dow't we break after Tx/Rx case ?? keyword: full-duplex */
+		if (status & (RxORN | RxERR | RxOK))
+			/* Rx interrupt */
+			sis900_rx(net_dev);
+
+		if (status & (TxURN | TxERR | TxIDLE))
+			/* Tx interrupt */
+			sis900_finish_xmit(net_dev);
+
+		/* something strange happened !!! */
+		if (status & HIBERR) {
+			printk(KERN_INFO "%s: Abnormal interrupt,"
+			       "status %#8.8x.\n", net_dev->name, status);
+			break;
+		}
+		if (--boguscnt < 0) {
+			printk(KERN_INFO "%s: Too much work at interrupt, "
+			       "interrupt status = %#8.8x.\n",
+			       net_dev->name, status);
+			break;
+		}
+	} while (1);
+
+	if (sis900_debug > 4)
+		printk(KERN_INFO "%s: exiting interrupt, "
+		       "interrupt status = 0x%#8.8x.\n",
+		       net_dev->name, inl(ioaddr + isr));
+	
+#if defined(__i386__)
+	clear_bit(0, (void*)&net_dev->interrupt);
+#else
+	net_dev->interrupt = 0;
+#endif
+	return;
+}
+
+/* Process receive interrupt events, put buffer to higher layer and refill buffer pool
+   Note: This fucntion is called by interrupt handler, don't do "too much" work here */
+static int sis900_rx(struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	long ioaddr = net_dev->base_addr;
+	unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
+	u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
+
+	if (sis900_debug > 4)
+		printk(KERN_INFO "sis900_rx, cur_rx:%4.4d, dirty_rx:%4.4d "
+		       "status:0x%8.8x\n",
+		       sis_priv->cur_rx, sis_priv->dirty_rx, rx_status);
+
+	while (rx_status & OWN) {
+		unsigned int rx_size;
+
+		rx_size = (rx_status & DSIZE) - CRC_SIZE;
+
+		if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
+			/* corrupted packet received */
+			if (sis900_debug > 4)
+				printk(KERN_INFO "%s: Corrupted packet "
+				       "received, buffer status = 0x%8.8x.\n",
+				       net_dev->name, rx_status);
+			sis_priv->stats.rx_errors++;
+			if (rx_status & OVERRUN)
+				sis_priv->stats.rx_over_errors++;
+			if (rx_status & (TOOLONG|RUNT))
+				sis_priv->stats.rx_length_errors++;
+			if (rx_status & (RXISERR | FAERR))
+				sis_priv->stats.rx_frame_errors++;
+			if (rx_status & CRCERR)
+				sis_priv->stats.rx_crc_errors++;
+			/* reset buffer descriptor state */
+			sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
+		} else {
+			struct sk_buff * skb;
+
+			/* This situation should never happen, but due to
+			   some unknow bugs, it is possible that
+			   we are working on NULL sk_buff :-( */
+			if (sis_priv->rx_skbuff[entry] == NULL) {
+				printk(KERN_INFO "%s: NULL pointer "
+				       "encountered in Rx ring, skipping\n",
+				       net_dev->name);
+				break;
+			}
+
+			/* gvie the socket buffer to upper layers */
+			skb = sis_priv->rx_skbuff[entry];
+			skb_put(skb, rx_size);
+			skb->protocol = eth_type_trans(skb, net_dev);
+			netif_rx(skb);
+
+			/* some network statistics */
+			if ((rx_status & BCAST) == MCAST)
+				sis_priv->stats.multicast++;
+			net_dev->last_rx = jiffies;
+			/*			sis_priv->stats.rx_bytes += rx_size;*/
+			sis_priv->stats.rx_packets++;
+
+			/* refill the Rx buffer, what if there is not enought memory for
+			   new socket buffer ?? */
+			if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
+				/* not enough memory for skbuff, this makes a "hole"
+				   on the buffer ring, it is not clear how the
+				   hardware will react to this kind of degenerated
+				   buffer */
+				printk(KERN_INFO "%s: Memory squeeze,"
+				       "deferring packet.\n",
+				       net_dev->name);
+				sis_priv->rx_skbuff[entry] = NULL;
+				/* reset buffer descriptor state */
+				sis_priv->rx_ring[entry].cmdsts = 0;
+				sis_priv->rx_ring[entry].bufptr = 0;
+				sis_priv->stats.rx_dropped++;
+				break;
+			}
+			skb->dev = net_dev;
+			sis_priv->rx_skbuff[entry] = skb;
+			sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
+			sis_priv->rx_ring[entry].bufptr = virt_to_bus(skb->tail);
+			sis_priv->dirty_rx++;
+		}
+		sis_priv->cur_rx++;
+		entry = sis_priv->cur_rx % NUM_RX_DESC;
+		rx_status = sis_priv->rx_ring[entry].cmdsts;
+	} // while
+
+	/* refill the Rx buffer, what if the rate of refilling is slower than
+	   consuming ?? */
+	for (;sis_priv->cur_rx - sis_priv->dirty_rx > 0; sis_priv->dirty_rx++) {
+		struct sk_buff *skb;
+
+		entry = sis_priv->dirty_rx % NUM_RX_DESC;
+
+		if (sis_priv->rx_skbuff[entry] == NULL) {
+			if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
+				/* not enough memory for skbuff, this makes a "hole"
+				   on the buffer ring, it is not clear how the
+				   hardware will react to this kind of degenerated
+				   buffer */
+				printk(KERN_INFO "%s: Memory squeeze,"
+				       "deferring packet.\n",
+				       net_dev->name);
+				sis_priv->stats.rx_dropped++;
+				break;
+			}
+			skb->dev = net_dev;
+			sis_priv->rx_skbuff[entry] = skb;
+			sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
+			sis_priv->rx_ring[entry].bufptr = virt_to_bus(skb->tail);
+		}
+	}
+
+	/* re-enable the potentially idle receive state matchine */
+	outl(RxENA | inl(ioaddr + cr), ioaddr + cr );
+
+	return 0;
+}
+
+/* finish up transmission of packets, check for error condition and free skbuff etc.
+   Note: This fucntion is called by interrupt handler, don't do "too much" work here */
+static void sis900_finish_xmit (struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+
+	for (; sis_priv->dirty_tx < sis_priv->cur_tx; sis_priv->dirty_tx++) {
+		unsigned int entry;
+		u32 tx_status;
+
+		entry = sis_priv->dirty_tx % NUM_TX_DESC;
+		tx_status = sis_priv->tx_ring[entry].cmdsts;
+
+		if (tx_status & OWN) {
+			/* The packet is not transmitted yet (owned by hardware) !
+			   Note: the interrupt is generated only when Tx Machine
+			   is idle, so this is an almost impossible case */
+			break;
+		}
+
+		if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
+			/* packet unsuccessfully transmitted */
+			if (sis900_debug > 4)
+				printk(KERN_INFO "%s: Transmit "
+				       "error, Tx status %8.8x.\n",
+				       net_dev->name, tx_status);
+			sis_priv->stats.tx_errors++;
+			if (tx_status & UNDERRUN)
+				sis_priv->stats.tx_fifo_errors++;
+			if (tx_status & ABORT)
+				sis_priv->stats.tx_aborted_errors++;
+			if (tx_status & NOCARRIER)
+				sis_priv->stats.tx_carrier_errors++;
+			if (tx_status & OWCOLL)
+				sis_priv->stats.tx_window_errors++;
+		} else {
+			/* packet successfully transmitted */
+			sis_priv->stats.collisions += (tx_status & COLCNT) >> 16;
+			/*			sis_priv->stats.tx_bytes += tx_status & DSIZE;*/
+			sis_priv->stats.tx_packets++;
+		}
+		/* Free the original skb. */
+		dev_free_skb(sis_priv->tx_skbuff[entry]);
+		sis_priv->tx_skbuff[entry] = NULL;
+		sis_priv->tx_ring[entry].bufptr = 0;
+		sis_priv->tx_ring[entry].cmdsts = 0;
+	}
+
+	if (sis_priv->tx_full && net_dev->tbusy &&
+	    sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
+		/* The ring is no longer full, clear tbusy, tx_full and
+		   schedule more transmission by marking NET_BH */
+		sis_priv->tx_full = 0;
+		clear_bit(0, (void *)&net_dev->tbusy);
+		mark_bh(NET_BH);
+	}
+}
+
+static int
+sis900_close(struct device *net_dev)
+{
+	long ioaddr = net_dev->base_addr;
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	int i;
+
+	net_dev->start = 0;
+	net_dev->tbusy = 1;
+
+	/* Disable interrupts by clearing the interrupt mask. */
+	outl(0x0000, ioaddr + imr);
+	outl(0x0000, ioaddr + ier);
+
+	/* Stop the chip's Tx and Rx Status Machine */
+	outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
+
+	del_timer(&sis_priv->timer);
+
+	free_irq(net_dev->irq, net_dev);
+
+	/* Free Tx and RX skbuff */
+	for (i = 0; i < NUM_RX_DESC; i++) {
+		if (sis_priv->rx_skbuff[i] != NULL)
+			dev_free_skb(sis_priv->rx_skbuff[i]);
+		sis_priv->rx_skbuff[i] = 0;
+	}
+	for (i = 0; i < NUM_TX_DESC; i++) {
+		if (sis_priv->tx_skbuff[i] != NULL)
+			dev_free_skb(sis_priv->tx_skbuff[i]);
+		sis_priv->tx_skbuff[i] = 0;
+	}
+
+	/* Green! Put the chip in low-power mode. */
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+static int mii_ioctl(struct device *net_dev, struct ifreq *rq, int cmd)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	u16 *data = (u16 *)&rq->ifr_data;
+
+	switch(cmd) {
+	case SIOCDEVPRIVATE:			/* Get the address of the PHY in use. */
+		data[0] = sis_priv->mii->phy_addr;
+		/* Fall Through */
+	case SIOCDEVPRIVATE+1:			/* Read the specified MII register. */
+		data[3] = mdio_read(net_dev, data[0] & 0x1f, data[1] & 0x1f);
+		return 0;
+	case SIOCDEVPRIVATE+2:			/* Write the specified MII register */
+		if (!suser())
+			return -EPERM;
+		mdio_write(net_dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static struct enet_statistics *
+sis900_get_stats(struct device *net_dev)
+{
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+
+	return &sis_priv->stats;
+}
+
+
+/* SiS 900 uses the most sigificant 7 bits to index a 128 bits multicast
+ * hash table, which makes this function a little bit different from other drivers
+ * SiS 900 B0 & 635 M/B uses the most significat 8 bits to index 256 bits
+ * multicast hash table.
+ */
+static u16 sis900_compute_hashtable_index(u8 *addr, u8 revision)
+{
+
+/* what is the correct value of the POLYNOMIAL ??
+   Donald Becker use 0x04C11DB7U
+   Joseph Zbiciak im14u2c@primenet.com gives me the
+   correct answer, thank you Joe !! */
+#define POLYNOMIAL 0x04C11DB7L
+	u32 crc = 0xffffffff, msb;
+	int  i, j;
+	u32 byte;
+
+	for (i = 0; i < 6; i++) {
+		byte = *addr++;
+		for (j = 0; j < 8; j++) {
+			msb = crc >> 31;
+			crc <<= 1;
+			if (msb ^ (byte & 1)) {
+				crc ^= POLYNOMIAL;
+			}
+			byte >>= 1;
+		}
+	}
+
+	/* leave 8 or 7 most siginifant bits */
+	if((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
+		return ((int)(crc >> 24));
+	else
+		return ((int)(crc >> 25));
+}
+
+static void set_rx_mode(struct device *net_dev)
+{
+	long ioaddr = net_dev->base_addr;
+	struct sis900_private * sis_priv = (struct sis900_private *)net_dev->priv;
+	u16 mc_filter[16] = {0};	/* 256/128 bits multicast hash table */
+	int i, table_entries;
+	u32 rx_mode;
+	u8 revision;
+
+	/* 635 Hash Table entires = 256(2^16) */
+	pcibios_read_config_byte(sis_priv->pci_bus, sis_priv->pci_device_fn, PCI_CLASS_REVISION, &revision);
+	if((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
+		table_entries = 16;
+	else
+		table_entries = 8;
+
+	if (net_dev->flags & IFF_PROMISC) {
+		/* Accept any kinds of packets */
+		rx_mode = RFPromiscuous;
+		for (i = 0; i < table_entries; i++)
+			mc_filter[i] = 0xffff;
+	} else if ((net_dev->mc_count > multicast_filter_limit) ||
+		   (net_dev->flags & IFF_ALLMULTI)) {
+		/* too many multicast addresses or accept all multicast packets */
+		rx_mode = RFAAB | RFAAM;
+		for (i = 0; i < table_entries; i++)
+			mc_filter[i] = 0xffff;
+	} else {
+		/* Accept Broadcast packets, destination addresses match our MAC address,
+		   use Receive Filter to reject unwanted MCAST packets */
+		struct dev_mc_list *mclist;
+		rx_mode = RFAAB;
+		for (i = 0, mclist = net_dev->mc_list; mclist && i < net_dev->mc_count;
+		     i++, mclist = mclist->next)
+			set_bit(sis900_compute_hashtable_index(mclist->dmi_addr, revision),
+				mc_filter);
+	}
+
+	/* update Multicast Hash Table in Receive Filter */
+	for (i = 0; i < table_entries; i++) {
+		/* why plus 0x04 ??, That makes the correct value for hash table. */
+		outl((u32)(0x00000004+i) << RFADDR_shift, ioaddr + rfcr);
+		outl(mc_filter[i], ioaddr + rfdr);
+	}
+
+	outl(RFEN | rx_mode, ioaddr + rfcr);
+
+	/* sis900 is capatable of looping back packet at MAC level for debugging purpose */
+	if (net_dev->flags & IFF_LOOPBACK) {
+		u32 cr_saved;
+		/* We must disable Tx/Rx before setting loopback mode */
+		cr_saved = inl(ioaddr + cr);
+		outl(cr_saved | TxDIS | RxDIS, ioaddr + cr);
+		/* enable loopback */
+		outl(inl(ioaddr + txcfg) | TxMLB, ioaddr + txcfg);
+		outl(inl(ioaddr + rxcfg) | RxATX, ioaddr + rxcfg);
+		/* restore cr */
+		outl(cr_saved, ioaddr + cr);
+	}		
+
+	return;
+}
+
+static void sis900_reset(struct device *net_dev)
+{
+	long ioaddr = net_dev->base_addr;
+	struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
+	int i = 0;
+	u8 revision;
+	u32 status = TxRCMP | RxRCMP;
+
+	outl(0, ioaddr + ier);
+	outl(0, ioaddr + imr);
+	outl(0, ioaddr + rfcr);
+
+	outl(RxRESET | TxRESET | RESET | inl(ioaddr + cr), ioaddr + cr);
+	
+	/* Check that the chip has finished the reset. */
+	while (status && (i++ < 1000)) {
+		status ^= (inl(isr + ioaddr) & status);
+	}
+
+	pcibios_read_config_byte(sis_priv->pci_bus, sis_priv->pci_device_fn, PCI_CLASS_REVISION, &revision);
+	if( (revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV) )
+		outl(PESEL | RND_CNT, ioaddr + cfg);
+	else
+		outl(PESEL, ioaddr + cfg);
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+	return sis900_probe(NULL);
+}
+
+void
+cleanup_module(void)
+{
+	/* No need to check MOD_IN_USE, as sys_delete_module() checks. */
+	while (root_sis900_dev) {
+		struct sis900_private *sis_priv =
+			(struct sis900_private *)root_sis900_dev->priv;
+		struct device *next_dev = sis_priv->next_module;
+		struct mii_phy *phy = NULL;
+
+		while(sis_priv->first_mii){
+			phy = sis_priv->first_mii;
+			sis_priv->first_mii = phy->next;
+			kfree(phy);
+		}
+
+		unregister_netdev(root_sis900_dev);
+		release_region(root_sis900_dev->base_addr,
+			       sis_priv->mac->io_size);
+		kfree(sis_priv);
+		kfree(root_sis900_dev);
+
+		root_sis900_dev = next_dev;
+	}
+}
+
+#endif	/* MODULE */
diff --git a/linux/src/drivers/net/sis900.h b/linux/src/drivers/net/sis900.h
new file mode 100644
index 0000000..2153625
--- /dev/null
+++ b/linux/src/drivers/net/sis900.h
@@ -0,0 +1,284 @@
+/* sis900.h Definitions for SiS ethernet controllers including 7014/7016 and 900
+ * Copyright 1999 Silicon Integrated System Corporation
+ * References:
+ *   SiS 7016 Fast Ethernet PCI Bus 10/100 Mbps LAN Controller with OnNow Support,
+ *	preliminary Rev. 1.0 Jan. 14, 1998
+ *   SiS 900 Fast Ethernet PCI Bus 10/100 Mbps LAN Single Chip with OnNow Support,
+ *	preliminary Rev. 1.0 Nov. 10, 1998
+ *   SiS 7014 Single Chip 100BASE-TX/10BASE-T Physical Layer Solution,
+ *	preliminary Rev. 1.0 Jan. 18, 1998
+ *   http://www.sis.com.tw/support/databook.htm
+ */
+
+/* MAC operationl registers of SiS 7016 and SiS 900 ehternet controller */
+/* The I/O extent, SiS 900 needs 256 bytes of io address */
+#define SIS900_TOTAL_SIZE 0x100
+
+/* Symbolic offsets to registers. */
+enum sis900_registers {
+	cr=0x0,                 //Command Register
+	cfg=0x4,                //Configuration Register
+	mear=0x8,               //EEPROM Access Register
+	ptscr=0xc,              //PCI Test Control Register
+	isr=0x10,               //Interrupt Status Register
+	imr=0x14,               //Interrupt Mask Register
+	ier=0x18,               //Interrupt Enable Register
+	epar=0x18,              //Enhanced PHY Access Register
+	txdp=0x20,              //Transmit Descriptor Pointer Register
+        txcfg=0x24,             //Transmit Configuration Register
+        rxdp=0x30,              //Receive Descriptor Pointer Register
+        rxcfg=0x34,             //Receive Configuration Register
+        flctrl=0x38,            //Flow Control Register
+        rxlen=0x3c,             //Receive Packet Length Register
+        rfcr=0x48,              //Receive Filter Control Register
+        rfdr=0x4C,              //Receive Filter Data Register
+        pmctrl=0xB0,            //Power Management Control Register
+        pmer=0xB4               //Power Management Wake-up Event Register
+};
+
+/* Symbolic names for bits in various registers */
+enum sis900_command_register_bits {
+	RELOAD  = 0x00000400, ACCESSMODE = 0x00000200,/* ET */
+	RESET   = 0x00000100, SWI = 0x00000080, RxRESET = 0x00000020,
+	TxRESET = 0x00000010, RxDIS = 0x00000008, RxENA = 0x00000004,
+	TxDIS   = 0x00000002, TxENA = 0x00000001
+};
+
+enum sis900_configuration_register_bits {
+	DESCRFMT = 0x00000100 /* 7016 specific */, REQALG = 0x00000080,
+	SB    = 0x00000040, POW = 0x00000020, EXD = 0x00000010,
+	PESEL = 0x00000008, LPM = 0x00000004, BEM = 0x00000001,
+	/* 635 & 900B Specific */
+        RND_CNT = 0x00000400, FAIR_BACKOFF = 0x00000200,
+        EDB_MASTER_EN = 0x00002000
+};
+
+enum sis900_eeprom_access_reigster_bits {
+	MDC  = 0x00000040, MDDIR = 0x00000020, MDIO = 0x00000010, /* 7016 specific */
+	EECS = 0x00000008, EECLK = 0x00000004, EEDO = 0x00000002,
+	EEDI = 0x00000001
+};
+
+enum sis900_interrupt_register_bits {
+	WKEVT  = 0x10000000, TxPAUSEEND = 0x08000000, TxPAUSE = 0x04000000,
+	TxRCMP = 0x02000000, RxRCMP = 0x01000000, DPERR = 0x00800000,
+	SSERR  = 0x00400000, RMABT  = 0x00200000, RTABT = 0x00100000,
+	RxSOVR = 0x00010000, HIBERR = 0x00008000, SWINT = 0x00001000,
+	MIBINT = 0x00000800, TxURN  = 0x00000400, TxIDLE  = 0x00000200,
+	TxERR  = 0x00000100, TxDESC = 0x00000080, TxOK  = 0x00000040,
+	RxORN  = 0x00000020, RxIDLE = 0x00000010, RxEARLY = 0x00000008,
+	RxERR  = 0x00000004, RxDESC = 0x00000002, RxOK  = 0x00000001
+};
+
+enum sis900_interrupt_enable_reigster_bits {
+	IE = 0x00000001
+};
+
+/* maximum dma burst fro transmission and receive*/
+#define MAX_DMA_RANGE	7	/* actually 0 means MAXIMUM !! */
+#define TxMXDMA_shift   	20
+#define RxMXDMA_shift    	20
+
+enum sis900_tx_rx_dma{
+        DMA_BURST_512 = 0,      DMA_BURST_64 = 5
+};
+
+/* transmit FIFO threshholds */
+#define TX_FILL_THRESH   16	/* 1/4 FIFO size */
+#define TxFILLT_shift   	8
+#define TxDRNT_shift    	0
+#define TxDRNT_100      	48	/* 3/4 FIFO size */
+#define TxDRNT_10		16 	/* 1/2 FIFO size */
+
+enum sis900_transmit_config_register_bits {
+	TxCSI = 0x80000000, TxHBI = 0x40000000, TxMLB = 0x20000000,
+	TxATP = 0x10000000, TxIFG = 0x0C000000, TxFILLT = 0x00003F00,
+	TxDRNT = 0x0000003F
+};
+
+/* recevie FIFO thresholds */
+#define RxDRNT_shift     1
+#define RxDRNT_100	16	/* 1/2 FIFO size */
+#define RxDRNT_10		24 	/* 3/4 FIFO size */
+
+enum sis900_reveive_config_register_bits {
+	RxAEP  = 0x80000000, RxARP = 0x40000000, RxATX = 0x10000000,
+	RxAJAB = 0x08000000, RxDRNT = 0x0000007F
+};
+
+#define RFAA_shift      28
+#define RFADDR_shift    16
+
+enum sis900_receive_filter_control_register_bits {
+	RFEN  = 0x80000000, RFAAB = 0x40000000, RFAAM = 0x20000000,
+	RFAAP = 0x10000000, RFPromiscuous = (RFAAB|RFAAM|RFAAP)
+};
+
+enum sis900_reveive_filter_data_mask {
+	RFDAT =  0x0000FFFF
+};
+
+/* EEPROM Addresses */
+enum sis900_eeprom_address {
+	EEPROMSignature = 0x00, EEPROMVendorID = 0x02, EEPROMDeviceID = 0x03,
+	EEPROMMACAddr   = 0x08, EEPROMChecksum = 0x0b
+};
+
+/* The EEPROM commands include the alway-set leading bit. Refer to NM93Cxx datasheet */
+enum sis900_eeprom_command {
+	EEread     = 0x0180, EEwrite    = 0x0140, EEerase = 0x01C0,
+	EEwriteEnable = 0x0130, EEwriteDisable = 0x0100,
+	EEeraseAll = 0x0120, EEwriteAll = 0x0110,
+	EEaddrMask = 0x013F, EEcmdShift = 16
+};
+
+/* For SiS962, request the eeprom software access */
+enum sis962_eeprom_command {
+	EEREQ = 0x00000400, EEDONE = 0x00000200, EEGNT = 0x00000100
+};
+
+/* Manamgement Data I/O (mdio) frame */
+#define MIIread         0x6000
+#define MIIwrite        0x5002
+#define MIIpmdShift     7
+#define MIIregShift     2
+#define MIIcmdLen       16
+#define MIIcmdShift     16
+
+/* Buffer Descriptor Status*/
+enum sis900_buffer_status {
+	OWN    = 0x80000000, MORE   = 0x40000000, INTR = 0x20000000,
+	SUPCRC = 0x10000000, INCCRC = 0x10000000,
+	OK     = 0x08000000, DSIZE  = 0x00000FFF
+};
+/* Status for TX Buffers */
+enum sis900_tx_buffer_status {
+	ABORT   = 0x04000000, UNDERRUN = 0x02000000, NOCARRIER = 0x01000000,
+	DEFERD  = 0x00800000, EXCDEFER = 0x00400000, OWCOLL    = 0x00200000,
+	EXCCOLL = 0x00100000, COLCNT   = 0x000F0000
+};
+
+enum sis900_rx_bufer_status {
+	OVERRUN = 0x02000000, DEST = 0x00800000,     BCAST = 0x01800000,
+	MCAST   = 0x01000000, UNIMATCH = 0x00800000, TOOLONG = 0x00400000,
+	RUNT    = 0x00200000, RXISERR  = 0x00100000, CRCERR  = 0x00080000,
+	FAERR   = 0x00040000, LOOPBK   = 0x00020000, RXCOL   = 0x00010000
+};
+
+/* MII register offsets */
+enum mii_registers {
+	MII_CONTROL = 0x0000, MII_STATUS = 0x0001, MII_PHY_ID0 = 0x0002,
+	MII_PHY_ID1 = 0x0003, MII_ANADV  = 0x0004, MII_ANLPAR  = 0x0005,
+	MII_ANEXT   = 0x0006
+};
+
+/* mii registers specific to SiS 900 */
+enum sis_mii_registers {
+	MII_CONFIG1 = 0x0010, MII_CONFIG2 = 0x0011, MII_STSOUT = 0x0012,
+	MII_MASK    = 0x0013, MII_RESV    = 0x0014
+};
+
+/* mii registers specific to ICS 1893 */
+enum ics_mii_registers {
+	MII_EXTCTRL  = 0x0010, MII_QPDSTS = 0x0011, MII_10BTOP = 0x0012,
+	MII_EXTCTRL2 = 0x0013
+};
+
+/* mii registers specific to AMD 79C901 */
+enum amd_mii_registers {
+	MII_STATUS_SUMMARY = 0x0018
+};
+
+/* MII Control register bit definitions. */
+enum mii_control_register_bits {
+	MII_CNTL_FDX     = 0x0100, MII_CNTL_RST_AUTO = 0x0200,
+	MII_CNTL_ISOLATE = 0x0400, MII_CNTL_PWRDWN   = 0x0800,
+	MII_CNTL_AUTO    = 0x1000, MII_CNTL_SPEED    = 0x2000,
+	MII_CNTL_LPBK    = 0x4000, MII_CNTL_RESET    = 0x8000
+};
+
+/* MII Status register bit  */
+enum mii_status_register_bits {
+	MII_STAT_EXT    = 0x0001, MII_STAT_JAB        = 0x0002,
+	MII_STAT_LINK   = 0x0004, MII_STAT_CAN_AUTO   = 0x0008,
+	MII_STAT_FAULT  = 0x0010, MII_STAT_AUTO_DONE  = 0x0020,
+	MII_STAT_CAN_T  = 0x0800, MII_STAT_CAN_T_FDX  = 0x1000,
+	MII_STAT_CAN_TX = 0x2000, MII_STAT_CAN_TX_FDX = 0x4000,
+	MII_STAT_CAN_T4 = 0x8000
+};
+
+#define		MII_ID1_OUI_LO		0xFC00	/* low bits of OUI mask */
+#define		MII_ID1_MODEL		0x03F0	/* model number */
+#define		MII_ID1_REV		0x000F	/* model number */
+
+/* MII NWAY Register Bits ...
+   valid for the ANAR (Auto-Negotiation Advertisement) and
+   ANLPAR (Auto-Negotiation Link Partner) registers */
+enum mii_nway_register_bits {
+	MII_NWAY_NODE_SEL = 0x001f, MII_NWAY_CSMA_CD = 0x0001,
+	MII_NWAY_T	  = 0x0020, MII_NWAY_T_FDX   = 0x0040,
+	MII_NWAY_TX       = 0x0080, MII_NWAY_TX_FDX  = 0x0100,
+	MII_NWAY_T4       = 0x0200, MII_NWAY_PAUSE   = 0x0400,
+	MII_NWAY_RF       = 0x2000, MII_NWAY_ACK     = 0x4000,
+	MII_NWAY_NP       = 0x8000
+};
+
+enum mii_stsout_register_bits {
+	MII_STSOUT_LINK_FAIL = 0x4000,
+	MII_STSOUT_SPD       = 0x0080, MII_STSOUT_DPLX = 0x0040
+};
+
+enum mii_stsics_register_bits {
+	MII_STSICS_SPD  = 0x8000, MII_STSICS_DPLX = 0x4000,
+	MII_STSICS_LINKSTS = 0x0001
+};
+
+enum mii_stssum_register_bits {
+	MII_STSSUM_LINK = 0x0008, MII_STSSUM_DPLX = 0x0004,
+	MII_STSSUM_AUTO = 0x0002, MII_STSSUM_SPD  = 0x0001
+};
+
+enum sis900_revision_id {
+	SIS630A_900_REV = 0x80, 	SIS630E_900_REV = 0x81,
+	SIS630S_900_REV = 0x82,		SIS630EA1_900_REV = 0x83,
+	SIS630ET_900_REV = 0x84,        SIS635A_900_REV = 0x90,
+	SIS962_900_REV = 0X91,		SIS900B_900_REV = 0x03
+};
+
+enum sis630_revision_id {
+        SIS630A0    = 0x00, SIS630A1      = 0x01,
+        SIS630B0    = 0x10, SIS630B1      = 0x11
+};
+
+#define FDX_CAPABLE_DUPLEX_UNKNOWN      0
+#define FDX_CAPABLE_HALF_SELECTED       1
+#define FDX_CAPABLE_FULL_SELECTED       2
+
+#define HW_SPEED_UNCONFIG		0
+#define HW_SPEED_HOME		1
+#define HW_SPEED_10_MBPS        	10
+#define HW_SPEED_100_MBPS       	100
+#define HW_SPEED_DEFAULT        	(HW_SPEED_100_MBPS)
+
+#define CRC_SIZE                4
+#define MAC_HEADER_SIZE         14
+
+#define TX_BUF_SIZE     1536
+#define RX_BUF_SIZE     1536
+
+#define NUM_TX_DESC     16      	/* Number of Tx descriptor registers. */
+#define NUM_RX_DESC     16       	/* Number of Rx descriptor registers. */
+
+#define TRUE            1
+#define FALSE           0
+
+/* PCI stuff, should be move to pic.h */
+#define PCI_DEVICE_ID_SI_900	0x900
+#define PCI_DEVICE_ID_SI_7016	0x7016
+#define SIS630_VENDOR_ID        0x1039
+#define SIS630_DEVICE_ID        0x0630
+
+/* ioctl for accessing MII transveiver */
+#define SIOCGMIIPHY (SIOCDEVPRIVATE)		/* Get the PHY in use. */
+#define SIOCGMIIREG (SIOCDEVPRIVATE+1)		/* Read a PHY register. */
+#define SIOCSMIIREG (SIOCDEVPRIVATE+2)		/* Write a PHY register */