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-rw-r--r--drivers/net/ethernet/sis/sis900.c2586
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diff --git a/drivers/net/ethernet/sis/sis900.c b/drivers/net/ethernet/sis/sis900.c
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index 0000000000..cb7fec226c
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+++ b/drivers/net/ethernet/sis/sis900.c
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+/* sis900.c: A SiS 900/7016 PCI Fast Ethernet driver for Linux.
+ Copyright 1999 Silicon Integrated System Corporation
+ Revision: 1.08.10 Apr. 2 2006
+
+ 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 General 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
+
+ Rev 1.08.10 Apr. 2 2006 Daniele Venzano add vlan (jumbo packets) support
+ Rev 1.08.09 Sep. 19 2005 Daniele Venzano add Wake on LAN support
+ Rev 1.08.08 Jan. 22 2005 Daniele Venzano use netif_msg for debugging messages
+ Rev 1.08.07 Nov. 2 2003 Daniele Venzano <venza@brownhat.org> add suspend/resume support
+ Rev 1.08.06 Sep. 24 2002 Mufasa Yang bug fix for Tx timeout & add SiS963 support
+ Rev 1.08.05 Jun. 6 2002 Mufasa Yang bug fix for read_eeprom & Tx descriptor over-boundary
+ Rev 1.08.04 Apr. 25 2002 Mufasa Yang <mufasa@sis.com.tw> added SiS962 support
+ Rev 1.08.03 Feb. 1 2002 Matt Domsch <Matt_Domsch@dell.com> update to use library crc32 function
+ Rev 1.08.02 Nov. 30 2001 Hui-Fen Hsu workaround for EDB & bug fix for dhcp problem
+ Rev 1.08.01 Aug. 25 2001 Hui-Fen Hsu update for 630ET & workaround for ICS1893 PHY
+ Rev 1.08.00 Jun. 11 2001 Hui-Fen Hsu workaround for RTL8201 PHY and some bug fix
+ Rev 1.07.11 Apr. 2 2001 Hui-Fen Hsu updates PCI drivers to use the new pci_set_dma_mask for kernel 2.4.3
+ Rev 1.07.10 Mar. 1 2001 Hui-Fen Hsu <hfhsu@sis.com.tw> some bug fix & 635M/B support
+ Rev 1.07.09 Feb. 9 2001 Dave Jones <davej@suse.de> PCI enable cleanup
+ Rev 1.07.08 Jan. 8 2001 Lei-Chun Chang added RTL8201 PHY support
+ Rev 1.07.07 Nov. 29 2000 Lei-Chun Chang added kernel-doc extractable documentation and 630 workaround fix
+ Rev 1.07.06 Nov. 7 2000 Jeff Garzik <jgarzik@pobox.com> some bug fix and cleaning
+ Rev 1.07.05 Nov. 6 2000 metapirat<metapirat@gmx.de> contribute media type select by ifconfig
+ Rev 1.07.04 Sep. 6 2000 Lei-Chun Chang added ICS1893 PHY support
+ Rev 1.07.03 Aug. 24 2000 Lei-Chun Chang (lcchang@sis.com.tw) modified 630E equalizer workaround rule
+ Rev 1.07.01 Aug. 08 2000 Ollie Lho minor update for SiS 630E and SiS 630E A1
+ Rev 1.07 Mar. 07 2000 Ollie Lho bug fix in Rx buffer ring
+ Rev 1.06.04 Feb. 11 2000 Jeff Garzik <jgarzik@pobox.com> softnet and init for kernel 2.4
+ 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/moduleparam.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/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/mii.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/crc32.h>
+#include <linux/bitops.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/processor.h> /* Processor type for cache alignment. */
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h> /* User space memory access functions */
+
+#include "sis900.h"
+
+#define SIS900_MODULE_NAME "sis900"
+#define SIS900_DRV_VERSION "v1.08.10 Apr. 2 2006"
+
+static const char version[] =
+ KERN_INFO "sis900.c: " SIS900_DRV_VERSION "\n";
+
+static int max_interrupt_work = 40;
+static int multicast_filter_limit = 128;
+
+static int sis900_debug = -1; /* Use SIS900_DEF_MSG as value */
+
+#define SIS900_DEF_MSG \
+ (NETIF_MSG_DRV | \
+ NETIF_MSG_LINK | \
+ NETIF_MSG_RX_ERR | \
+ NETIF_MSG_TX_ERR)
+
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT (4*HZ)
+
+enum {
+ SIS_900 = 0,
+ SIS_7016
+};
+static const char * card_names[] = {
+ "SiS 900 PCI Fast Ethernet",
+ "SiS 7016 PCI Fast Ethernet"
+};
+
+static const struct pci_device_id sis900_pci_tbl[] = {
+ {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_900,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_900},
+ {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7016,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_7016},
+ {0,}
+};
+MODULE_DEVICE_TABLE (pci, sis900_pci_tbl);
+
+static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex);
+
+static const 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
+#define UNKNOWN 0x0
+} mii_chip_table[] = {
+ { "SiS 900 Internal MII PHY", 0x001d, 0x8000, LAN },
+ { "SiS 7014 Physical Layer Solution", 0x0016, 0xf830, LAN },
+ { "SiS 900 on Foxconn 661 7MI", 0x0143, 0xBC70, LAN },
+ { "Altimata AC101LF PHY", 0x0022, 0x5520, LAN },
+ { "ADM 7001 LAN PHY", 0x002e, 0xcc60, LAN },
+ { "AMD 79C901 10BASE-T PHY", 0x0000, 0x6B70, LAN },
+ { "AMD 79C901 HomePNA PHY", 0x0000, 0x6B90, HOME},
+ { "ICS LAN PHY", 0x0015, 0xF440, LAN },
+ { "ICS LAN PHY", 0x0143, 0xBC70, LAN },
+ { "NS 83851 PHY", 0x2000, 0x5C20, MIX },
+ { "NS 83847 PHY", 0x2000, 0x5C30, MIX },
+ { "Realtek RTL8201 PHY", 0x0000, 0x8200, LAN },
+ { "VIA 6103 PHY", 0x0101, 0x8f20, LAN },
+ {NULL,},
+};
+
+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 pci_dev * pci_dev;
+
+ spinlock_t lock;
+
+ struct mii_phy * mii;
+ struct mii_phy * first_mii; /* record the first mii structure */
+ unsigned int cur_phy;
+ struct mii_if_info mii_info;
+
+ void __iomem *ioaddr;
+
+ struct timer_list timer; /* Link status detection timer. */
+ u8 autong_complete; /* 1: auto-negotiate complete */
+
+ u32 msg_enable;
+
+ unsigned int cur_rx, dirty_rx; /* producer/consumer 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;
+ BufferDesc *rx_ring;
+
+ dma_addr_t tx_ring_dma;
+ dma_addr_t rx_ring_dma;
+
+ unsigned int tx_full; /* The Tx queue is full. */
+ u8 host_bridge_rev;
+ u8 chipset_rev;
+ /* EEPROM data */
+ int eeprom_size;
+};
+
+MODULE_AUTHOR("Jim Huang <cmhuang@sis.com.tw>, Ollie Lho <ollie@sis.com.tw>");
+MODULE_DESCRIPTION("SiS 900 PCI Fast Ethernet driver");
+MODULE_LICENSE("GPL");
+
+module_param(multicast_filter_limit, int, 0444);
+module_param(max_interrupt_work, int, 0444);
+module_param(sis900_debug, int, 0444);
+MODULE_PARM_DESC(multicast_filter_limit, "SiS 900/7016 maximum number of filtered multicast addresses");
+MODULE_PARM_DESC(max_interrupt_work, "SiS 900/7016 maximum events handled per interrupt");
+MODULE_PARM_DESC(sis900_debug, "SiS 900/7016 bitmapped debugging message level");
+
+#define sw32(reg, val) iowrite32(val, ioaddr + (reg))
+#define sw8(reg, val) iowrite8(val, ioaddr + (reg))
+#define sr32(reg) ioread32(ioaddr + (reg))
+#define sr16(reg) ioread16(ioaddr + (reg))
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void sis900_poll(struct net_device *dev);
+#endif
+static int sis900_open(struct net_device *net_dev);
+static int sis900_mii_probe (struct net_device * net_dev);
+static void sis900_init_rxfilter (struct net_device * net_dev);
+static u16 read_eeprom(void __iomem *ioaddr, int location);
+static int mdio_read(struct net_device *net_dev, int phy_id, int location);
+static void mdio_write(struct net_device *net_dev, int phy_id, int location, int val);
+static void sis900_timer(struct timer_list *t);
+static void sis900_check_mode (struct net_device *net_dev, struct mii_phy *mii_phy);
+static void sis900_tx_timeout(struct net_device *net_dev, unsigned int txqueue);
+static void sis900_init_tx_ring(struct net_device *net_dev);
+static void sis900_init_rx_ring(struct net_device *net_dev);
+static netdev_tx_t sis900_start_xmit(struct sk_buff *skb,
+ struct net_device *net_dev);
+static int sis900_rx(struct net_device *net_dev);
+static void sis900_finish_xmit (struct net_device *net_dev);
+static irqreturn_t sis900_interrupt(int irq, void *dev_instance);
+static int sis900_close(struct net_device *net_dev);
+static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd);
+static u16 sis900_mcast_bitnr(u8 *addr, u8 revision);
+static void set_rx_mode(struct net_device *net_dev);
+static void sis900_reset(struct net_device *net_dev);
+static void sis630_set_eq(struct net_device *net_dev, u8 revision);
+static int sis900_set_config(struct net_device *dev, struct ifmap *map);
+static u16 sis900_default_phy(struct net_device * net_dev);
+static void sis900_set_capability( struct net_device *net_dev ,struct mii_phy *phy);
+static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr);
+static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr);
+static void sis900_set_mode(struct sis900_private *, int speed, int duplex);
+static const struct ethtool_ops sis900_ethtool_ops;
+
+/**
+ * sis900_get_mac_addr - Get MAC address for stand alone SiS900 model
+ * @pci_dev: the sis900 pci device
+ * @net_dev: the net device to get address for
+ *
+ * Older SiS900 and friends, use EEPROM to store MAC address.
+ * MAC address is read from read_eeprom() into @net_dev->dev_addr.
+ */
+
+static int sis900_get_mac_addr(struct pci_dev *pci_dev,
+ struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u16 addr[ETH_ALEN / 2];
+ 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_WARNING "%s: Error EEPROM read %x\n",
+ pci_name(pci_dev), signature);
+ return 0;
+ }
+
+ /* get MAC address from EEPROM */
+ for (i = 0; i < 3; i++)
+ addr[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
+ eth_hw_addr_set(net_dev, (u8 *)addr);
+
+ return 1;
+}
+
+/**
+ * sis630e_get_mac_addr - Get MAC address for SiS630E model
+ * @pci_dev: the sis900 pci device
+ * @net_dev: the net device to get address for
+ *
+ * SiS630E model, use APC CMOS RAM to store MAC address.
+ * APC CMOS RAM is accessed through ISA bridge.
+ * MAC address is read into @net_dev->dev_addr.
+ */
+
+static int sis630e_get_mac_addr(struct pci_dev *pci_dev,
+ struct net_device *net_dev)
+{
+ struct pci_dev *isa_bridge = NULL;
+ u8 addr[ETH_ALEN];
+ u8 reg;
+ int i;
+
+ isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0008, isa_bridge);
+ if (!isa_bridge)
+ isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0018, isa_bridge);
+ if (!isa_bridge) {
+ printk(KERN_WARNING "%s: Can not find ISA bridge\n",
+ pci_name(pci_dev));
+ return 0;
+ }
+ pci_read_config_byte(isa_bridge, 0x48, &reg);
+ pci_write_config_byte(isa_bridge, 0x48, reg | 0x40);
+
+ for (i = 0; i < 6; i++) {
+ outb(0x09 + i, 0x70);
+ addr[i] = inb(0x71);
+ }
+ eth_hw_addr_set(net_dev, addr);
+
+ pci_write_config_byte(isa_bridge, 0x48, reg & ~0x40);
+ pci_dev_put(isa_bridge);
+
+ return 1;
+}
+
+
+/**
+ * sis635_get_mac_addr - Get MAC address for SIS635 model
+ * @pci_dev: the sis900 pci device
+ * @net_dev: the net device to get address for
+ *
+ * SiS635 model, set MAC Reload Bit to load Mac address from APC
+ * to rfdr. rfdr is accessed through rfcr. MAC address is read into
+ * @net_dev->dev_addr.
+ */
+
+static int sis635_get_mac_addr(struct pci_dev *pci_dev,
+ struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u16 addr[ETH_ALEN / 2];
+ u32 rfcrSave;
+ u32 i;
+
+ rfcrSave = sr32(rfcr);
+
+ sw32(cr, rfcrSave | RELOAD);
+ sw32(cr, 0);
+
+ /* disable packet filtering before setting filter */
+ sw32(rfcr, rfcrSave & ~RFEN);
+
+ /* load MAC addr to filter data register */
+ for (i = 0 ; i < 3 ; i++) {
+ sw32(rfcr, (i << RFADDR_shift));
+ addr[i] = sr16(rfdr);
+ }
+ eth_hw_addr_set(net_dev, (u8 *)addr);
+
+ /* enable packet filtering */
+ sw32(rfcr, rfcrSave | RFEN);
+
+ return 1;
+}
+
+/**
+ * sis96x_get_mac_addr - Get MAC address for SiS962 or SiS963 model
+ * @pci_dev: the sis900 pci device
+ * @net_dev: the net device to get address for
+ *
+ * SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
+ * is shared by
+ * LAN and 1394. When accessing EEPROM, send EEREQ signal to hardware first
+ * and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be accessed
+ * by LAN, otherwise it is not. After MAC address is read from EEPROM, send
+ * EEDONE signal to refuse EEPROM access by LAN.
+ * The EEPROM map of SiS962 or SiS963 is different to SiS900.
+ * The signature field in SiS962 or SiS963 spec is meaningless.
+ * MAC address is read into @net_dev->dev_addr.
+ */
+
+static int sis96x_get_mac_addr(struct pci_dev *pci_dev,
+ struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u16 addr[ETH_ALEN / 2];
+ int wait, rc = 0;
+
+ sw32(mear, EEREQ);
+ for (wait = 0; wait < 2000; wait++) {
+ if (sr32(mear) & EEGNT) {
+ int i;
+
+ /* get MAC address from EEPROM */
+ for (i = 0; i < 3; i++)
+ addr[i] = read_eeprom(ioaddr, i + EEPROMMACAddr);
+ eth_hw_addr_set(net_dev, (u8 *)addr);
+
+ rc = 1;
+ break;
+ }
+ udelay(1);
+ }
+ sw32(mear, EEDONE);
+ return rc;
+}
+
+static const struct net_device_ops sis900_netdev_ops = {
+ .ndo_open = sis900_open,
+ .ndo_stop = sis900_close,
+ .ndo_start_xmit = sis900_start_xmit,
+ .ndo_set_config = sis900_set_config,
+ .ndo_set_rx_mode = set_rx_mode,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_eth_ioctl = mii_ioctl,
+ .ndo_tx_timeout = sis900_tx_timeout,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = sis900_poll,
+#endif
+};
+
+/**
+ * sis900_probe - Probe for sis900 device
+ * @pci_dev: the sis900 pci device
+ * @pci_id: the pci device ID
+ *
+ * Check and probe sis900 net device for @pci_dev.
+ * Get mac address according to the chip revision,
+ * and assign SiS900-specific entries in the device structure.
+ * ie: sis900_open(), sis900_start_xmit(), sis900_close(), etc.
+ */
+
+static int sis900_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *pci_id)
+{
+ struct sis900_private *sis_priv;
+ struct net_device *net_dev;
+ struct pci_dev *dev;
+ dma_addr_t ring_dma;
+ void *ring_space;
+ void __iomem *ioaddr;
+ int i, ret;
+ const char *card_name = card_names[pci_id->driver_data];
+ const char *dev_name = pci_name(pci_dev);
+
+/* when built into the kernel, we only print version if device is found */
+#ifndef MODULE
+ static int printed_version;
+ if (!printed_version++)
+ printk(version);
+#endif
+
+ /* setup various bits in PCI command register */
+ ret = pcim_enable_device(pci_dev);
+ if(ret) return ret;
+
+ i = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32));
+ if(i){
+ printk(KERN_ERR "sis900.c: architecture does not support "
+ "32bit PCI busmaster DMA\n");
+ return i;
+ }
+
+ pci_set_master(pci_dev);
+
+ net_dev = alloc_etherdev(sizeof(struct sis900_private));
+ if (!net_dev)
+ return -ENOMEM;
+ SET_NETDEV_DEV(net_dev, &pci_dev->dev);
+
+ /* We do a request_region() to register /proc/ioports info. */
+ ret = pci_request_regions(pci_dev, "sis900");
+ if (ret)
+ goto err_out;
+
+ /* IO region. */
+ ioaddr = pci_iomap(pci_dev, 0, 0);
+ if (!ioaddr) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ sis_priv = netdev_priv(net_dev);
+ sis_priv->ioaddr = ioaddr;
+ sis_priv->pci_dev = pci_dev;
+ spin_lock_init(&sis_priv->lock);
+
+ sis_priv->eeprom_size = 24;
+
+ pci_set_drvdata(pci_dev, net_dev);
+
+ ring_space = dma_alloc_coherent(&pci_dev->dev, TX_TOTAL_SIZE,
+ &ring_dma, GFP_KERNEL);
+ if (!ring_space) {
+ ret = -ENOMEM;
+ goto err_out_unmap;
+ }
+ sis_priv->tx_ring = ring_space;
+ sis_priv->tx_ring_dma = ring_dma;
+
+ ring_space = dma_alloc_coherent(&pci_dev->dev, RX_TOTAL_SIZE,
+ &ring_dma, GFP_KERNEL);
+ if (!ring_space) {
+ ret = -ENOMEM;
+ goto err_unmap_tx;
+ }
+ sis_priv->rx_ring = ring_space;
+ sis_priv->rx_ring_dma = ring_dma;
+
+ /* The SiS900-specific entries in the device structure. */
+ net_dev->netdev_ops = &sis900_netdev_ops;
+ net_dev->watchdog_timeo = TX_TIMEOUT;
+ net_dev->ethtool_ops = &sis900_ethtool_ops;
+
+ if (sis900_debug > 0)
+ sis_priv->msg_enable = sis900_debug;
+ else
+ sis_priv->msg_enable = SIS900_DEF_MSG;
+
+ sis_priv->mii_info.dev = net_dev;
+ sis_priv->mii_info.mdio_read = mdio_read;
+ sis_priv->mii_info.mdio_write = mdio_write;
+ sis_priv->mii_info.phy_id_mask = 0x1f;
+ sis_priv->mii_info.reg_num_mask = 0x1f;
+
+ /* Get Mac address according to the chip revision */
+ sis_priv->chipset_rev = pci_dev->revision;
+ if(netif_msg_probe(sis_priv))
+ printk(KERN_DEBUG "%s: detected revision %2.2x, "
+ "trying to get MAC address...\n",
+ dev_name, sis_priv->chipset_rev);
+
+ ret = 0;
+ if (sis_priv->chipset_rev == SIS630E_900_REV)
+ ret = sis630e_get_mac_addr(pci_dev, net_dev);
+ else if ((sis_priv->chipset_rev > 0x81) && (sis_priv->chipset_rev <= 0x90) )
+ ret = sis635_get_mac_addr(pci_dev, net_dev);
+ else if (sis_priv->chipset_rev == SIS96x_900_REV)
+ ret = sis96x_get_mac_addr(pci_dev, net_dev);
+ else
+ ret = sis900_get_mac_addr(pci_dev, net_dev);
+
+ if (!ret || !is_valid_ether_addr(net_dev->dev_addr)) {
+ eth_hw_addr_random(net_dev);
+ printk(KERN_WARNING "%s: Unreadable or invalid MAC address,"
+ "using random generated one\n", dev_name);
+ }
+
+ /* 630ET : set the mii access mode as software-mode */
+ if (sis_priv->chipset_rev == SIS630ET_900_REV)
+ sw32(cr, ACCESSMODE | sr32(cr));
+
+ /* probe for mii transceiver */
+ if (sis900_mii_probe(net_dev) == 0) {
+ printk(KERN_WARNING "%s: Error probing MII device.\n",
+ dev_name);
+ ret = -ENODEV;
+ goto err_unmap_rx;
+ }
+
+ /* save our host bridge revision */
+ dev = pci_get_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_630, NULL);
+ if (dev) {
+ sis_priv->host_bridge_rev = dev->revision;
+ pci_dev_put(dev);
+ }
+
+ ret = register_netdev(net_dev);
+ if (ret)
+ goto err_unmap_rx;
+
+ /* print some information about our NIC */
+ printk(KERN_INFO "%s: %s at 0x%p, IRQ %d, %pM\n",
+ net_dev->name, card_name, ioaddr, pci_dev->irq,
+ net_dev->dev_addr);
+
+ /* Detect Wake on Lan support */
+ ret = (sr32(CFGPMC) & PMESP) >> 27;
+ if (netif_msg_probe(sis_priv) && (ret & PME_D3C) == 0)
+ printk(KERN_INFO "%s: Wake on LAN only available from suspend to RAM.", net_dev->name);
+
+ return 0;
+
+err_unmap_rx:
+ dma_free_coherent(&pci_dev->dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
+ sis_priv->rx_ring_dma);
+err_unmap_tx:
+ dma_free_coherent(&pci_dev->dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
+ sis_priv->tx_ring_dma);
+err_out_unmap:
+ pci_iounmap(pci_dev, ioaddr);
+ err_out:
+ free_netdev(net_dev);
+ return ret;
+}
+
+/**
+ * sis900_mii_probe - Probe MII PHY for sis900
+ * @net_dev: the net device to probe for
+ *
+ * Search for total of 32 possible mii phy addresses.
+ * Identify and set current phy if found one,
+ * return error if it failed to found.
+ */
+
+static int sis900_mii_probe(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ const char *dev_name = pci_name(sis_priv->pci_dev);
+ u16 poll_bit = MII_STAT_LINK, status = 0;
+ unsigned long timeout = jiffies + 5 * HZ;
+ int phy_addr;
+
+ 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;
+
+ mii_phy = NULL;
+ for(i = 0; i < 2; i++)
+ mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+ if (mii_status == 0xffff || mii_status == 0x0000) {
+ if (netif_msg_probe(sis_priv))
+ printk(KERN_DEBUG "%s: MII at address %d"
+ " not accessible\n",
+ dev_name, phy_addr);
+ continue;
+ }
+
+ if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
+ mii_phy = sis_priv->first_mii;
+ while (mii_phy) {
+ struct mii_phy *phy;
+ phy = mii_phy;
+ mii_phy = mii_phy->next;
+ kfree(phy);
+ }
+ 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",
+ 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",
+ dev_name, phy_addr);
+ mii_phy->phy_types = UNKNOWN;
+ }
+ }
+
+ if (sis_priv->mii == NULL) {
+ printk(KERN_INFO "%s: No MII transceivers found!\n", dev_name);
+ return 0;
+ }
+
+ /* select default PHY for mac */
+ 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) {
+ yield();
+
+ poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
+ if (time_after_eq(jiffies, timeout)) {
+ printk(KERN_WARNING "%s: reset phy and link down now\n",
+ dev_name);
+ return -ETIME;
+ }
+ }
+ }
+
+ if (sis_priv->chipset_rev == 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)
+ netif_carrier_on(net_dev);
+ else
+ netif_carrier_off(net_dev);
+
+ return 1;
+}
+
+/**
+ * sis900_default_phy - Select default PHY for sis900 mac.
+ * @net_dev: the net device to probe for
+ *
+ * Select first detected PHY with link as default.
+ * If no one is link on, select PHY whose types is HOME as default.
+ * If HOME doesn't exist, select LAN.
+ */
+
+static u16 sis900_default_phy(struct net_device * net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ struct mii_phy *phy = NULL, *phy_home = NULL,
+ *default_phy = NULL, *phy_lan = 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 default PHY & not ghost PHY */
+ if ((status & MII_STAT_LINK) && !default_phy &&
+ (phy->phy_types != UNKNOWN)) {
+ 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;
+ else if(phy->phy_types == LAN)
+ phy_lan = phy;
+ }
+ }
+
+ if (!default_phy && phy_home)
+ default_phy = phy_home;
+ else if (!default_phy && phy_lan)
+ default_phy = phy_lan;
+ 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",
+ pci_name(sis_priv->pci_dev), sis_priv->cur_phy);
+ }
+
+ sis_priv->mii_info.phy_id = 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.
+ * @net_dev : the net device to probe for
+ * @phy : default PHY
+ *
+ * Set the media capability of network adapter according to
+ * mii status register. It's necessary before auto-negotiate.
+ */
+
+static void sis900_set_capability(struct net_device *net_dev, struct mii_phy *phy)
+{
+ u16 cap;
+
+ mdio_read(net_dev, phy->phy_addr, MII_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() sr32(mear)
+
+/**
+ * read_eeprom - Read Serial EEPROM
+ * @ioaddr: base i/o address
+ * @location: the EEPROM location to read
+ *
+ * Read Serial EEPROM through EEPROM Access Register.
+ * Note that location is in word (16 bits) unit
+ */
+
+static u16 read_eeprom(void __iomem *ioaddr, int location)
+{
+ u32 read_cmd = location | EEread;
+ int i;
+ u16 retval = 0;
+
+ sw32(mear, 0);
+ eeprom_delay();
+ sw32(mear, EECS);
+ eeprom_delay();
+
+ /* Shift the read command (9) bits out. */
+ for (i = 8; i >= 0; i--) {
+ u32 dataval = (read_cmd & (1 << i)) ? EEDI | EECS : EECS;
+
+ sw32(mear, dataval);
+ eeprom_delay();
+ sw32(mear, dataval | EECLK);
+ eeprom_delay();
+ }
+ sw32(mear, EECS);
+ eeprom_delay();
+
+ /* read the 16-bits data in */
+ for (i = 16; i > 0; i--) {
+ sw32(mear, EECS);
+ eeprom_delay();
+ sw32(mear, EECS | EECLK);
+ eeprom_delay();
+ retval = (retval << 1) | ((sr32(mear) & EEDO) ? 1 : 0);
+ eeprom_delay();
+ }
+
+ /* Terminate the EEPROM access. */
+ sw32(mear, 0);
+ eeprom_delay();
+
+ 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 separately */
+#define mdio_delay() sr32(mear)
+
+static void mdio_idle(struct sis900_private *sp)
+{
+ void __iomem *ioaddr = sp->ioaddr;
+
+ sw32(mear, MDIO | MDDIR);
+ mdio_delay();
+ sw32(mear, MDIO | MDDIR | MDC);
+}
+
+/* Synchronize the MII management interface by shifting 32 one bits out. */
+static void mdio_reset(struct sis900_private *sp)
+{
+ void __iomem *ioaddr = sp->ioaddr;
+ int i;
+
+ for (i = 31; i >= 0; i--) {
+ sw32(mear, MDDIR | MDIO);
+ mdio_delay();
+ sw32(mear, MDDIR | MDIO | MDC);
+ mdio_delay();
+ }
+}
+
+/**
+ * mdio_read - read MII PHY register
+ * @net_dev: the net device to read
+ * @phy_id: the phy address to read
+ * @location: the phy register id to read
+ *
+ * Read MII registers through MDIO and MDC
+ * using MDIO management frame structure and protocol(defined by ISO/IEC).
+ * Please see SiS7014 or ICS spec
+ */
+
+static int mdio_read(struct net_device *net_dev, int phy_id, int location)
+{
+ int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
+ struct sis900_private *sp = netdev_priv(net_dev);
+ void __iomem *ioaddr = sp->ioaddr;
+ u16 retval = 0;
+ int i;
+
+ mdio_reset(sp);
+ mdio_idle(sp);
+
+ for (i = 15; i >= 0; i--) {
+ int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
+
+ sw32(mear, dataval);
+ mdio_delay();
+ sw32(mear, dataval | MDC);
+ mdio_delay();
+ }
+
+ /* Read the 16 data bits. */
+ for (i = 16; i > 0; i--) {
+ sw32(mear, 0);
+ mdio_delay();
+ retval = (retval << 1) | ((sr32(mear) & MDIO) ? 1 : 0);
+ sw32(mear, MDC);
+ mdio_delay();
+ }
+ sw32(mear, 0x00);
+
+ return retval;
+}
+
+/**
+ * mdio_write - write MII PHY register
+ * @net_dev: the net device to write
+ * @phy_id: the phy address to write
+ * @location: the phy register id to write
+ * @value: the register value to write with
+ *
+ * Write MII registers with @value through MDIO and MDC
+ * using MDIO management frame structure and protocol(defined by ISO/IEC)
+ * please see SiS7014 or ICS spec
+ */
+
+static void mdio_write(struct net_device *net_dev, int phy_id, int location,
+ int value)
+{
+ int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
+ struct sis900_private *sp = netdev_priv(net_dev);
+ void __iomem *ioaddr = sp->ioaddr;
+ int i;
+
+ mdio_reset(sp);
+ mdio_idle(sp);
+
+ /* Shift the command bits out. */
+ for (i = 15; i >= 0; i--) {
+ int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
+
+ sw8(mear, dataval);
+ mdio_delay();
+ sw8(mear, dataval | MDC);
+ mdio_delay();
+ }
+ mdio_delay();
+
+ /* Shift the value bits out. */
+ for (i = 15; i >= 0; i--) {
+ int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
+
+ sw32(mear, dataval);
+ mdio_delay();
+ sw32(mear, dataval | MDC);
+ mdio_delay();
+ }
+ mdio_delay();
+
+ /* Clear out extra bits. */
+ for (i = 2; i > 0; i--) {
+ sw8(mear, 0);
+ mdio_delay();
+ sw8(mear, MDC);
+ mdio_delay();
+ }
+ sw32(mear, 0x00);
+}
+
+
+/**
+ * sis900_reset_phy - reset sis900 mii phy.
+ * @net_dev: the net device to write
+ * @phy_addr: default phy address
+ *
+ * Some specific phy can't work properly without reset.
+ * This function will be called during initialization and
+ * link status change from ON to DOWN.
+ */
+
+static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr)
+{
+ int i;
+ u16 status;
+
+ for (i = 0; i < 2; i++)
+ status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+ mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
+
+ return status;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+*/
+static void sis900_poll(struct net_device *dev)
+{
+ struct sis900_private *sp = netdev_priv(dev);
+ const int irq = sp->pci_dev->irq;
+
+ disable_irq(irq);
+ sis900_interrupt(irq, dev);
+ enable_irq(irq);
+}
+#endif
+
+/**
+ * sis900_open - open sis900 device
+ * @net_dev: the net device to open
+ *
+ * Do some initialization and start net interface.
+ * enable interrupts and set sis900 timer.
+ */
+
+static int
+sis900_open(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ int ret;
+
+ /* Soft reset the chip. */
+ sis900_reset(net_dev);
+
+ /* Equalizer workaround Rule */
+ sis630_set_eq(net_dev, sis_priv->chipset_rev);
+
+ ret = request_irq(sis_priv->pci_dev->irq, sis900_interrupt, IRQF_SHARED,
+ net_dev->name, net_dev);
+ if (ret)
+ return ret;
+
+ sis900_init_rxfilter(net_dev);
+
+ sis900_init_tx_ring(net_dev);
+ sis900_init_rx_ring(net_dev);
+
+ set_rx_mode(net_dev);
+
+ netif_start_queue(net_dev);
+
+ /* Workaround for EDB */
+ sis900_set_mode(sis_priv, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
+
+ /* Enable all known interrupts by setting the interrupt mask. */
+ sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxDESC);
+ sw32(cr, RxENA | sr32(cr));
+ sw32(ier, IE);
+
+ 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. */
+ timer_setup(&sis_priv->timer, sis900_timer, 0);
+ sis_priv->timer.expires = jiffies + HZ;
+ add_timer(&sis_priv->timer);
+
+ return 0;
+}
+
+/**
+ * sis900_init_rxfilter - Initialize the Rx filter
+ * @net_dev: the net device to initialize for
+ *
+ * Set receive filter address to our MAC address
+ * and enable packet filtering.
+ */
+
+static void
+sis900_init_rxfilter (struct net_device * net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u32 rfcrSave;
+ u32 i;
+
+ rfcrSave = sr32(rfcr);
+
+ /* disable packet filtering before setting filter */
+ sw32(rfcr, rfcrSave & ~RFEN);
+
+ /* load MAC addr to filter data register */
+ for (i = 0 ; i < 3 ; i++) {
+ u32 w = (u32) *((const u16 *)(net_dev->dev_addr)+i);
+
+ sw32(rfcr, i << RFADDR_shift);
+ sw32(rfdr, w);
+
+ if (netif_msg_hw(sis_priv)) {
+ printk(KERN_DEBUG "%s: Receive Filter Address[%d]=%x\n",
+ net_dev->name, i, sr32(rfdr));
+ }
+ }
+
+ /* enable packet filtering */
+ sw32(rfcr, rfcrSave | RFEN);
+}
+
+/**
+ * sis900_init_tx_ring - Initialize the Tx descriptor ring
+ * @net_dev: the net device to initialize for
+ *
+ * Initialize the Tx descriptor ring,
+ */
+
+static void
+sis900_init_tx_ring(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ 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 = sis_priv->tx_ring_dma +
+ ((i+1)%NUM_TX_DESC)*sizeof(BufferDesc);
+ sis_priv->tx_ring[i].cmdsts = 0;
+ sis_priv->tx_ring[i].bufptr = 0;
+ }
+
+ /* load Transmit Descriptor Register */
+ sw32(txdp, sis_priv->tx_ring_dma);
+ if (netif_msg_hw(sis_priv))
+ printk(KERN_DEBUG "%s: TX descriptor register loaded with: %8.8x\n",
+ net_dev->name, sr32(txdp));
+}
+
+/**
+ * sis900_init_rx_ring - Initialize the Rx descriptor ring
+ * @net_dev: the net device to initialize for
+ *
+ * Initialize the Rx descriptor ring,
+ * and pre-allocate receive buffers (socket buffer)
+ */
+
+static void
+sis900_init_rx_ring(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ 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 = sis_priv->rx_ring_dma +
+ ((i+1)%NUM_RX_DESC)*sizeof(BufferDesc);
+ sis_priv->rx_ring[i].cmdsts = 0;
+ sis_priv->rx_ring[i].bufptr = 0;
+ }
+
+ /* allocate sock buffers */
+ for (i = 0; i < NUM_RX_DESC; i++) {
+ struct sk_buff *skb;
+
+ if ((skb = netdev_alloc_skb(net_dev, 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;
+ }
+ sis_priv->rx_skbuff[i] = skb;
+ sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
+ sis_priv->rx_ring[i].bufptr = dma_map_single(&sis_priv->pci_dev->dev,
+ skb->data,
+ RX_BUF_SIZE,
+ DMA_FROM_DEVICE);
+ if (unlikely(dma_mapping_error(&sis_priv->pci_dev->dev,
+ sis_priv->rx_ring[i].bufptr))) {
+ dev_kfree_skb(skb);
+ sis_priv->rx_skbuff[i] = NULL;
+ break;
+ }
+ }
+ sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
+
+ /* load Receive Descriptor Register */
+ sw32(rxdp, sis_priv->rx_ring_dma);
+ if (netif_msg_hw(sis_priv))
+ printk(KERN_DEBUG "%s: RX descriptor register loaded with: %8.8x\n",
+ net_dev->name, sr32(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 detect (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-detect 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 net_device *net_dev, u8 revision)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ u16 reg14h, eq_value=0, max_value=0, min_value=0;
+ int i, maxcount=10;
+
+ if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
+ revision == SIS630A_900_REV || revision == SIS630ET_900_REV) )
+ return;
+
+ if (netif_carrier_ok(net_dev)) {
+ 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 &&
+ (sis_priv->host_bridge_rev == SIS630B0 ||
+ sis_priv->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 &&
+ (sis_priv->host_bridge_rev == SIS630B0 ||
+ sis_priv->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);
+ }
+}
+
+/**
+ * sis900_timer - sis900 timer routine
+ * @t: timer list containing a pointer to sis900 net device
+ *
+ * On each timer ticks we check two things,
+ * link status (ON/OFF) and link mode (10/100/Full/Half)
+ */
+
+static void sis900_timer(struct timer_list *t)
+{
+ struct sis900_private *sis_priv = from_timer(sis_priv, t, timer);
+ struct net_device *net_dev = sis_priv->mii_info.dev;
+ struct mii_phy *mii_phy = sis_priv->mii;
+ static const int next_tick = 5*HZ;
+ int speed = 0, duplex = 0;
+ u16 status;
+
+ 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 (!netif_carrier_ok(net_dev)) {
+ LookForLink:
+ /* Search for new PHY */
+ status = sis900_default_phy(net_dev);
+ mii_phy = sis_priv->mii;
+
+ if (status & MII_STAT_LINK) {
+ WARN_ON(!(status & MII_STAT_AUTO_DONE));
+
+ sis900_read_mode(net_dev, &speed, &duplex);
+ if (duplex) {
+ sis900_set_mode(sis_priv, speed, duplex);
+ sis630_set_eq(net_dev, sis_priv->chipset_rev);
+ netif_carrier_on(net_dev);
+ }
+ }
+ } else {
+ /* Link ON -> OFF */
+ if (!(status & MII_STAT_LINK)){
+ netif_carrier_off(net_dev);
+ if(netif_msg_link(sis_priv))
+ 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);
+
+ sis630_set_eq(net_dev, sis_priv->chipset_rev);
+
+ goto LookForLink;
+ }
+ }
+
+ sis_priv->timer.expires = jiffies + next_tick;
+ add_timer(&sis_priv->timer);
+}
+
+/**
+ * sis900_check_mode - check the media mode for sis900
+ * @net_dev: the net device to be checked
+ * @mii_phy: the mii phy
+ *
+ * Older driver gets the media mode from mii status output
+ * register. Now we set our media capability and auto-negotiate
+ * to get the upper bound of speed and duplex between two ends.
+ * If the types of mii phy is HOME, it doesn't need to auto-negotiate
+ * and autong_complete should be set to 1.
+ */
+
+static void sis900_check_mode(struct net_device *net_dev, struct mii_phy *mii_phy)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ int speed, duplex;
+
+ if (mii_phy->phy_types == LAN) {
+ sw32(cfg, ~EXD & sr32(cfg));
+ sis900_set_capability(net_dev , mii_phy);
+ sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
+ } else {
+ sw32(cfg, EXD | sr32(cfg));
+ speed = HW_SPEED_HOME;
+ duplex = FDX_CAPABLE_HALF_SELECTED;
+ sis900_set_mode(sis_priv, speed, duplex);
+ sis_priv->autong_complete = 1;
+ }
+}
+
+/**
+ * sis900_set_mode - Set the media mode of mac register.
+ * @sp: the device private data
+ * @speed : the transmit speed to be determined
+ * @duplex: the duplex mode to be determined
+ *
+ * Set the media mode of mac register txcfg/rxcfg according to
+ * speed and duplex of phy. Bit EDB_MASTER_EN indicates the EDB
+ * bus is used instead of PCI bus. When this bit is set 1, the
+ * Max DMA Burst Size for TX/RX DMA should be no larger than 16
+ * double words.
+ */
+
+static void sis900_set_mode(struct sis900_private *sp, int speed, int duplex)
+{
+ void __iomem *ioaddr = sp->ioaddr;
+ u32 tx_flags = 0, rx_flags = 0;
+
+ if (sr32( 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;
+ }
+
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+ /* Can accept Jumbo packet */
+ rx_flags |= RxAJAB;
+#endif
+
+ sw32(txcfg, tx_flags);
+ sw32(rxcfg, rx_flags);
+}
+
+/**
+ * sis900_auto_negotiate - Set the Auto-Negotiation Enable/Reset bit.
+ * @net_dev: the net device to read mode for
+ * @phy_addr: mii phy address
+ *
+ * If the adapter is link-on, set the auto-negotiate enable/reset bit.
+ * autong_complete should be set to 0 when starting auto-negotiation.
+ * autong_complete should be set to 1 if we didn't start auto-negotiation.
+ * sis900_timer will wait for link on again if autong_complete = 0.
+ */
+
+static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ int i = 0;
+ u32 status;
+
+ for (i = 0; i < 2; i++)
+ status = mdio_read(net_dev, phy_addr, MII_STATUS);
+
+ if (!(status & MII_STAT_LINK)){
+ if(netif_msg_link(sis_priv))
+ printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
+ sis_priv->autong_complete = 1;
+ netif_carrier_off(net_dev);
+ return;
+ }
+
+ /* (Re)start AutoNegotiate */
+ mdio_write(net_dev, phy_addr, MII_CONTROL,
+ MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
+ sis_priv->autong_complete = 0;
+}
+
+
+/**
+ * sis900_read_mode - read media mode for sis900 internal phy
+ * @net_dev: the net device to read mode for
+ * @speed : the transmit speed to be determined
+ * @duplex : the duplex mode to be determined
+ *
+ * The capability of remote end will be put in mii register autorec
+ * after auto-negotiation. Use AND operation to get the upper bound
+ * of speed and duplex between two ends.
+ */
+
+static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ struct mii_phy *phy = sis_priv->mii;
+ int phy_addr = sis_priv->cur_phy;
+ u32 status;
+ u16 autoadv, autorec;
+ int i;
+
+ for (i = 0; i < 2; i++)
+ 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;
+ }
+
+ if(netif_msg_link(sis_priv))
+ 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");
+}
+
+/**
+ * sis900_tx_timeout - sis900 transmit timeout routine
+ * @net_dev: the net device to transmit
+ * @txqueue: index of hanging queue
+ *
+ * print transmit timeout status
+ * disable interrupts and do some tasks
+ */
+
+static void sis900_tx_timeout(struct net_device *net_dev, unsigned int txqueue)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ unsigned long flags;
+ int i;
+
+ if (netif_msg_tx_err(sis_priv)) {
+ printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x\n",
+ net_dev->name, sr32(cr), sr32(isr));
+ }
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ sw32(imr, 0x0000);
+
+ /* use spinlock to prevent interrupt handler accessing buffer ring */
+ spin_lock_irqsave(&sis_priv->lock, flags);
+
+ /* discard unsent packets */
+ sis_priv->dirty_tx = sis_priv->cur_tx = 0;
+ for (i = 0; i < NUM_TX_DESC; i++) {
+ struct sk_buff *skb = sis_priv->tx_skbuff[i];
+
+ if (skb) {
+ dma_unmap_single(&sis_priv->pci_dev->dev,
+ sis_priv->tx_ring[i].bufptr,
+ skb->len, DMA_TO_DEVICE);
+ dev_kfree_skb_irq(skb);
+ sis_priv->tx_skbuff[i] = NULL;
+ sis_priv->tx_ring[i].cmdsts = 0;
+ sis_priv->tx_ring[i].bufptr = 0;
+ net_dev->stats.tx_dropped++;
+ }
+ }
+ sis_priv->tx_full = 0;
+ netif_wake_queue(net_dev);
+
+ spin_unlock_irqrestore(&sis_priv->lock, flags);
+
+ netif_trans_update(net_dev); /* prevent tx timeout */
+
+ /* load Transmit Descriptor Register */
+ sw32(txdp, sis_priv->tx_ring_dma);
+
+ /* Enable all known interrupts by setting the interrupt mask. */
+ sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxDESC);
+}
+
+/**
+ * sis900_start_xmit - sis900 start transmit routine
+ * @skb: socket buffer pointer to put the data being transmitted
+ * @net_dev: the net device to transmit with
+ *
+ * Set the transmit buffer descriptor,
+ * and write TxENA to enable transmit state machine.
+ * tell upper layer if the buffer is full
+ */
+
+static netdev_tx_t
+sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ unsigned int entry;
+ unsigned long flags;
+ unsigned int index_cur_tx, index_dirty_tx;
+ unsigned int count_dirty_tx;
+
+ spin_lock_irqsave(&sis_priv->lock, flags);
+
+ /* 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 = dma_map_single(&sis_priv->pci_dev->dev,
+ skb->data, skb->len,
+ DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(&sis_priv->pci_dev->dev,
+ sis_priv->tx_ring[entry].bufptr))) {
+ dev_kfree_skb_any(skb);
+ sis_priv->tx_skbuff[entry] = NULL;
+ net_dev->stats.tx_dropped++;
+ spin_unlock_irqrestore(&sis_priv->lock, flags);
+ return NETDEV_TX_OK;
+ }
+ sis_priv->tx_ring[entry].cmdsts = (OWN | INTR | skb->len);
+ sw32(cr, TxENA | sr32(cr));
+
+ sis_priv->cur_tx ++;
+ index_cur_tx = sis_priv->cur_tx;
+ index_dirty_tx = sis_priv->dirty_tx;
+
+ for (count_dirty_tx = 0; index_cur_tx != index_dirty_tx; index_dirty_tx++)
+ count_dirty_tx ++;
+
+ if (index_cur_tx == index_dirty_tx) {
+ /* dirty_tx is met in the cycle of cur_tx, buffer full */
+ sis_priv->tx_full = 1;
+ netif_stop_queue(net_dev);
+ } else if (count_dirty_tx < NUM_TX_DESC) {
+ /* Typical path, tell upper layer that more transmission is possible */
+ netif_start_queue(net_dev);
+ } else {
+ /* buffer full, tell upper layer no more transmission */
+ sis_priv->tx_full = 1;
+ netif_stop_queue(net_dev);
+ }
+
+ spin_unlock_irqrestore(&sis_priv->lock, flags);
+
+ if (netif_msg_tx_queued(sis_priv))
+ printk(KERN_DEBUG "%s: Queued Tx packet at %p size %d "
+ "to slot %d.\n",
+ net_dev->name, skb->data, (int)skb->len, entry);
+
+ return NETDEV_TX_OK;
+}
+
+/**
+ * sis900_interrupt - sis900 interrupt handler
+ * @irq: the irq number
+ * @dev_instance: the client data object
+ *
+ * The interrupt handler does all of the Rx thread work,
+ * and cleans up after the Tx thread
+ */
+
+static irqreturn_t sis900_interrupt(int irq, void *dev_instance)
+{
+ struct net_device *net_dev = dev_instance;
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ int boguscnt = max_interrupt_work;
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u32 status;
+ unsigned int handled = 0;
+
+ spin_lock (&sis_priv->lock);
+
+ do {
+ status = sr32(isr);
+
+ if ((status & (HIBERR|TxURN|TxERR|TxDESC|RxORN|RxERR|RxOK)) == 0)
+ /* nothing interesting happened */
+ break;
+ handled = 1;
+
+ /* 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 | TxDESC))
+ /* Tx interrupt */
+ sis900_finish_xmit(net_dev);
+
+ /* something strange happened !!! */
+ if (status & HIBERR) {
+ if(netif_msg_intr(sis_priv))
+ printk(KERN_INFO "%s: Abnormal interrupt, "
+ "status %#8.8x.\n", net_dev->name, status);
+ break;
+ }
+ if (--boguscnt < 0) {
+ if(netif_msg_intr(sis_priv))
+ printk(KERN_INFO "%s: Too much work at interrupt, "
+ "interrupt status = %#8.8x.\n",
+ net_dev->name, status);
+ break;
+ }
+ } while (1);
+
+ if(netif_msg_intr(sis_priv))
+ printk(KERN_DEBUG "%s: exiting interrupt, "
+ "interrupt status = %#8.8x\n",
+ net_dev->name, sr32(isr));
+
+ spin_unlock (&sis_priv->lock);
+ return IRQ_RETVAL(handled);
+}
+
+/**
+ * sis900_rx - sis900 receive routine
+ * @net_dev: the net device which receives data
+ *
+ * Process receive interrupt events,
+ * put buffer to higher layer and refill buffer pool
+ * Note: This function is called by interrupt handler,
+ * don't do "too much" work here
+ */
+
+static int sis900_rx(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
+ u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
+ int rx_work_limit;
+
+ if (netif_msg_rx_status(sis_priv))
+ printk(KERN_DEBUG "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);
+ rx_work_limit = sis_priv->dirty_rx + NUM_RX_DESC - sis_priv->cur_rx;
+
+ while (rx_status & OWN) {
+ unsigned int rx_size;
+ unsigned int data_size;
+
+ if (--rx_work_limit < 0)
+ break;
+
+ data_size = rx_status & DSIZE;
+ rx_size = data_size - CRC_SIZE;
+
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+ /* ``TOOLONG'' flag means jumbo packet received. */
+ if ((rx_status & TOOLONG) && data_size <= MAX_FRAME_SIZE)
+ rx_status &= (~ ((unsigned int)TOOLONG));
+#endif
+
+ if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
+ /* corrupted packet received */
+ if (netif_msg_rx_err(sis_priv))
+ printk(KERN_DEBUG "%s: Corrupted packet "
+ "received, buffer status = 0x%8.8x/%d.\n",
+ net_dev->name, rx_status, data_size);
+ net_dev->stats.rx_errors++;
+ if (rx_status & OVERRUN)
+ net_dev->stats.rx_over_errors++;
+ if (rx_status & (TOOLONG|RUNT))
+ net_dev->stats.rx_length_errors++;
+ if (rx_status & (RXISERR | FAERR))
+ net_dev->stats.rx_frame_errors++;
+ if (rx_status & CRCERR)
+ net_dev->stats.rx_crc_errors++;
+ /* reset buffer descriptor state */
+ sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
+ } else {
+ struct sk_buff * skb;
+ struct sk_buff * rx_skb;
+
+ dma_unmap_single(&sis_priv->pci_dev->dev,
+ sis_priv->rx_ring[entry].bufptr,
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+
+ /* refill the Rx buffer, what if there is not enough
+ * memory for new socket buffer ?? */
+ if ((skb = netdev_alloc_skb(net_dev, RX_BUF_SIZE)) == NULL) {
+ /*
+ * Not enough memory to refill the buffer
+ * so we need to recycle the old one so
+ * as to avoid creating a memory hole
+ * in the rx ring
+ */
+ skb = sis_priv->rx_skbuff[entry];
+ net_dev->stats.rx_dropped++;
+ goto refill_rx_ring;
+ }
+
+ /* This situation should never happen, but due to
+ some unknown bugs, it is possible that
+ we are working on NULL sk_buff :-( */
+ if (sis_priv->rx_skbuff[entry] == NULL) {
+ if (netif_msg_rx_err(sis_priv))
+ printk(KERN_WARNING "%s: NULL pointer "
+ "encountered in Rx ring\n"
+ "cur_rx:%4.4d, dirty_rx:%4.4d\n",
+ net_dev->name, sis_priv->cur_rx,
+ sis_priv->dirty_rx);
+ dev_kfree_skb(skb);
+ break;
+ }
+
+ /* give the socket buffer to upper layers */
+ rx_skb = sis_priv->rx_skbuff[entry];
+ skb_put(rx_skb, rx_size);
+ rx_skb->protocol = eth_type_trans(rx_skb, net_dev);
+ netif_rx(rx_skb);
+
+ /* some network statistics */
+ if ((rx_status & BCAST) == MCAST)
+ net_dev->stats.multicast++;
+ net_dev->stats.rx_bytes += rx_size;
+ net_dev->stats.rx_packets++;
+ sis_priv->dirty_rx++;
+refill_rx_ring:
+ sis_priv->rx_skbuff[entry] = skb;
+ sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
+ sis_priv->rx_ring[entry].bufptr =
+ dma_map_single(&sis_priv->pci_dev->dev,
+ skb->data, RX_BUF_SIZE,
+ DMA_FROM_DEVICE);
+ if (unlikely(dma_mapping_error(&sis_priv->pci_dev->dev,
+ sis_priv->rx_ring[entry].bufptr))) {
+ dev_kfree_skb_irq(skb);
+ sis_priv->rx_skbuff[entry] = NULL;
+ break;
+ }
+ }
+ 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; sis_priv->dirty_rx++) {
+ struct sk_buff *skb;
+
+ entry = sis_priv->dirty_rx % NUM_RX_DESC;
+
+ if (sis_priv->rx_skbuff[entry] == NULL) {
+ skb = netdev_alloc_skb(net_dev, RX_BUF_SIZE);
+ if (skb == 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 */
+ net_dev->stats.rx_dropped++;
+ break;
+ }
+ sis_priv->rx_skbuff[entry] = skb;
+ sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
+ sis_priv->rx_ring[entry].bufptr =
+ dma_map_single(&sis_priv->pci_dev->dev,
+ skb->data, RX_BUF_SIZE,
+ DMA_FROM_DEVICE);
+ if (unlikely(dma_mapping_error(&sis_priv->pci_dev->dev,
+ sis_priv->rx_ring[entry].bufptr))) {
+ dev_kfree_skb_irq(skb);
+ sis_priv->rx_skbuff[entry] = NULL;
+ break;
+ }
+ }
+ }
+ /* re-enable the potentially idle receive state matchine */
+ sw32(cr , RxENA | sr32(cr));
+
+ return 0;
+}
+
+/**
+ * sis900_finish_xmit - finish up transmission of packets
+ * @net_dev: the net device to be transmitted on
+ *
+ * Check for error condition and free socket buffer etc
+ * schedule for more transmission as needed
+ * Note: This function is called by interrupt handler,
+ * don't do "too much" work here
+ */
+
+static void sis900_finish_xmit (struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+
+ for (; sis_priv->dirty_tx != sis_priv->cur_tx; sis_priv->dirty_tx++) {
+ struct sk_buff *skb;
+ 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: this is an almost impossible condition
+ * on TxDESC interrupt ('descriptor interrupt') */
+ break;
+ }
+
+ if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
+ /* packet unsuccessfully transmitted */
+ if (netif_msg_tx_err(sis_priv))
+ printk(KERN_DEBUG "%s: Transmit "
+ "error, Tx status %8.8x.\n",
+ net_dev->name, tx_status);
+ net_dev->stats.tx_errors++;
+ if (tx_status & UNDERRUN)
+ net_dev->stats.tx_fifo_errors++;
+ if (tx_status & ABORT)
+ net_dev->stats.tx_aborted_errors++;
+ if (tx_status & NOCARRIER)
+ net_dev->stats.tx_carrier_errors++;
+ if (tx_status & OWCOLL)
+ net_dev->stats.tx_window_errors++;
+ } else {
+ /* packet successfully transmitted */
+ net_dev->stats.collisions += (tx_status & COLCNT) >> 16;
+ net_dev->stats.tx_bytes += tx_status & DSIZE;
+ net_dev->stats.tx_packets++;
+ }
+ /* Free the original skb. */
+ skb = sis_priv->tx_skbuff[entry];
+ dma_unmap_single(&sis_priv->pci_dev->dev,
+ sis_priv->tx_ring[entry].bufptr, skb->len,
+ DMA_TO_DEVICE);
+ dev_consume_skb_irq(skb);
+ 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 && netif_queue_stopped(net_dev) &&
+ sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
+ /* The ring is no longer full, clear tx_full and schedule
+ * more transmission by netif_wake_queue(net_dev) */
+ sis_priv->tx_full = 0;
+ netif_wake_queue (net_dev);
+ }
+}
+
+/**
+ * sis900_close - close sis900 device
+ * @net_dev: the net device to be closed
+ *
+ * Disable interrupts, stop the Tx and Rx Status Machine
+ * free Tx and RX socket buffer
+ */
+
+static int sis900_close(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ struct pci_dev *pdev = sis_priv->pci_dev;
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ struct sk_buff *skb;
+ int i;
+
+ netif_stop_queue(net_dev);
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ sw32(imr, 0x0000);
+ sw32(ier, 0x0000);
+
+ /* Stop the chip's Tx and Rx Status Machine */
+ sw32(cr, RxDIS | TxDIS | sr32(cr));
+
+ del_timer(&sis_priv->timer);
+
+ free_irq(pdev->irq, net_dev);
+
+ /* Free Tx and RX skbuff */
+ for (i = 0; i < NUM_RX_DESC; i++) {
+ skb = sis_priv->rx_skbuff[i];
+ if (skb) {
+ dma_unmap_single(&pdev->dev,
+ sis_priv->rx_ring[i].bufptr,
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+ dev_kfree_skb(skb);
+ sis_priv->rx_skbuff[i] = NULL;
+ }
+ }
+ for (i = 0; i < NUM_TX_DESC; i++) {
+ skb = sis_priv->tx_skbuff[i];
+ if (skb) {
+ dma_unmap_single(&pdev->dev,
+ sis_priv->tx_ring[i].bufptr,
+ skb->len, DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+ sis_priv->tx_skbuff[i] = NULL;
+ }
+ }
+
+ /* Green! Put the chip in low-power mode. */
+
+ return 0;
+}
+
+/**
+ * sis900_get_drvinfo - Return information about driver
+ * @net_dev: the net device to probe
+ * @info: container for info returned
+ *
+ * Process ethtool command such as "ehtool -i" to show information
+ */
+
+static void sis900_get_drvinfo(struct net_device *net_dev,
+ struct ethtool_drvinfo *info)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+
+ strscpy(info->driver, SIS900_MODULE_NAME, sizeof(info->driver));
+ strscpy(info->version, SIS900_DRV_VERSION, sizeof(info->version));
+ strscpy(info->bus_info, pci_name(sis_priv->pci_dev),
+ sizeof(info->bus_info));
+}
+
+static u32 sis900_get_msglevel(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ return sis_priv->msg_enable;
+}
+
+static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ sis_priv->msg_enable = value;
+}
+
+static u32 sis900_get_link(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ return mii_link_ok(&sis_priv->mii_info);
+}
+
+static int sis900_get_link_ksettings(struct net_device *net_dev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ spin_lock_irq(&sis_priv->lock);
+ mii_ethtool_get_link_ksettings(&sis_priv->mii_info, cmd);
+ spin_unlock_irq(&sis_priv->lock);
+ return 0;
+}
+
+static int sis900_set_link_ksettings(struct net_device *net_dev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ int rt;
+ spin_lock_irq(&sis_priv->lock);
+ rt = mii_ethtool_set_link_ksettings(&sis_priv->mii_info, cmd);
+ spin_unlock_irq(&sis_priv->lock);
+ return rt;
+}
+
+static int sis900_nway_reset(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ return mii_nway_restart(&sis_priv->mii_info);
+}
+
+/**
+ * sis900_set_wol - Set up Wake on Lan registers
+ * @net_dev: the net device to probe
+ * @wol: container for info passed to the driver
+ *
+ * Process ethtool command "wol" to setup wake on lan features.
+ * SiS900 supports sending WoL events if a correct packet is received,
+ * but there is no simple way to filter them to only a subset (broadcast,
+ * multicast, unicast or arp).
+ */
+
+static int sis900_set_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u32 cfgpmcsr = 0, pmctrl_bits = 0;
+
+ if (wol->wolopts == 0) {
+ pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
+ cfgpmcsr &= ~PME_EN;
+ pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
+ sw32(pmctrl, pmctrl_bits);
+ if (netif_msg_wol(sis_priv))
+ printk(KERN_DEBUG "%s: Wake on LAN disabled\n", net_dev->name);
+ return 0;
+ }
+
+ if (wol->wolopts & (WAKE_MAGICSECURE | WAKE_UCAST | WAKE_MCAST
+ | WAKE_BCAST | WAKE_ARP))
+ return -EINVAL;
+
+ if (wol->wolopts & WAKE_MAGIC)
+ pmctrl_bits |= MAGICPKT;
+ if (wol->wolopts & WAKE_PHY)
+ pmctrl_bits |= LINKON;
+
+ sw32(pmctrl, pmctrl_bits);
+
+ pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
+ cfgpmcsr |= PME_EN;
+ pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
+ if (netif_msg_wol(sis_priv))
+ printk(KERN_DEBUG "%s: Wake on LAN enabled\n", net_dev->name);
+
+ return 0;
+}
+
+static void sis900_get_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
+{
+ struct sis900_private *sp = netdev_priv(net_dev);
+ void __iomem *ioaddr = sp->ioaddr;
+ u32 pmctrl_bits;
+
+ pmctrl_bits = sr32(pmctrl);
+ if (pmctrl_bits & MAGICPKT)
+ wol->wolopts |= WAKE_MAGIC;
+ if (pmctrl_bits & LINKON)
+ wol->wolopts |= WAKE_PHY;
+
+ wol->supported = (WAKE_PHY | WAKE_MAGIC);
+}
+
+static int sis900_get_eeprom_len(struct net_device *dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(dev);
+
+ return sis_priv->eeprom_size;
+}
+
+static int sis900_read_eeprom(struct net_device *net_dev, u8 *buf)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ int wait, ret = -EAGAIN;
+ u16 signature;
+ u16 *ebuf = (u16 *)buf;
+ int i;
+
+ if (sis_priv->chipset_rev == SIS96x_900_REV) {
+ sw32(mear, EEREQ);
+ for (wait = 0; wait < 2000; wait++) {
+ if (sr32(mear) & EEGNT) {
+ /* read 16 bits, and index by 16 bits */
+ for (i = 0; i < sis_priv->eeprom_size / 2; i++)
+ ebuf[i] = (u16)read_eeprom(ioaddr, i);
+ ret = 0;
+ break;
+ }
+ udelay(1);
+ }
+ sw32(mear, EEDONE);
+ } else {
+ signature = (u16)read_eeprom(ioaddr, EEPROMSignature);
+ if (signature != 0xffff && signature != 0x0000) {
+ /* read 16 bits, and index by 16 bits */
+ for (i = 0; i < sis_priv->eeprom_size / 2; i++)
+ ebuf[i] = (u16)read_eeprom(ioaddr, i);
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+#define SIS900_EEPROM_MAGIC 0xBABE
+static int sis900_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct sis900_private *sis_priv = netdev_priv(dev);
+ u8 *eebuf;
+ int res;
+
+ eebuf = kmalloc(sis_priv->eeprom_size, GFP_KERNEL);
+ if (!eebuf)
+ return -ENOMEM;
+
+ eeprom->magic = SIS900_EEPROM_MAGIC;
+ spin_lock_irq(&sis_priv->lock);
+ res = sis900_read_eeprom(dev, eebuf);
+ spin_unlock_irq(&sis_priv->lock);
+ if (!res)
+ memcpy(data, eebuf + eeprom->offset, eeprom->len);
+ kfree(eebuf);
+ return res;
+}
+
+static const struct ethtool_ops sis900_ethtool_ops = {
+ .get_drvinfo = sis900_get_drvinfo,
+ .get_msglevel = sis900_get_msglevel,
+ .set_msglevel = sis900_set_msglevel,
+ .get_link = sis900_get_link,
+ .nway_reset = sis900_nway_reset,
+ .get_wol = sis900_get_wol,
+ .set_wol = sis900_set_wol,
+ .get_link_ksettings = sis900_get_link_ksettings,
+ .set_link_ksettings = sis900_set_link_ksettings,
+ .get_eeprom_len = sis900_get_eeprom_len,
+ .get_eeprom = sis900_get_eeprom,
+};
+
+/**
+ * mii_ioctl - process MII i/o control command
+ * @net_dev: the net device to command for
+ * @rq: parameter for command
+ * @cmd: the i/o command
+ *
+ * Process MII command like read/write MII register
+ */
+
+static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ struct mii_ioctl_data *data = if_mii(rq);
+
+ switch(cmd) {
+ case SIOCGMIIPHY: /* Get address of MII PHY in use. */
+ data->phy_id = sis_priv->mii->phy_addr;
+ fallthrough;
+
+ case SIOCGMIIREG: /* Read MII PHY register. */
+ data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
+ return 0;
+
+ case SIOCSMIIREG: /* Write MII PHY register. */
+ mdio_write(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/**
+ * sis900_set_config - Set media type by net_device.set_config
+ * @dev: the net device for media type change
+ * @map: ifmap passed by ifconfig
+ *
+ * Set media type to 10baseT, 100baseT or 0(for auto) by ifconfig
+ * we support only port changes. All other runtime configuration
+ * changes will be ignored
+ */
+
+static int sis900_set_config(struct net_device *dev, struct ifmap *map)
+{
+ struct sis900_private *sis_priv = netdev_priv(dev);
+ struct mii_phy *mii_phy = sis_priv->mii;
+
+ u16 status;
+
+ if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
+ /* we switch on the ifmap->port field. I couldn't find anything
+ * like a definition or standard for the values of that field.
+ * I think the meaning of those values is device specific. But
+ * since I would like to change the media type via the ifconfig
+ * command I use the definition from linux/netdevice.h
+ * (which seems to be different from the ifport(pcmcia) definition) */
+ switch(map->port){
+ case IF_PORT_UNKNOWN: /* use auto here */
+ dev->if_port = map->port;
+ /* we are going to change the media type, so the Link
+ * will be temporary down and we need to reflect that
+ * here. When the Link comes up again, it will be
+ * sensed by the sis_timer procedure, which also does
+ * all the rest for us */
+ netif_carrier_off(dev);
+
+ /* read current state */
+ status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
+
+ /* enable auto negotiation and reset the negotioation
+ * (I don't really know what the auto negatiotiation
+ * reset really means, but it sounds for me right to
+ * do one here) */
+ mdio_write(dev, mii_phy->phy_addr,
+ MII_CONTROL, status | MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
+
+ break;
+
+ case IF_PORT_10BASET: /* 10BaseT */
+ dev->if_port = map->port;
+
+ /* we are going to change the media type, so the Link
+ * will be temporary down and we need to reflect that
+ * here. When the Link comes up again, it will be
+ * sensed by the sis_timer procedure, which also does
+ * all the rest for us */
+ netif_carrier_off(dev);
+
+ /* set Speed to 10Mbps */
+ /* read current state */
+ status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
+
+ /* disable auto negotiation and force 10MBit mode*/
+ mdio_write(dev, mii_phy->phy_addr,
+ MII_CONTROL, status & ~(MII_CNTL_SPEED |
+ MII_CNTL_AUTO));
+ break;
+
+ case IF_PORT_100BASET: /* 100BaseT */
+ case IF_PORT_100BASETX: /* 100BaseTx */
+ dev->if_port = map->port;
+
+ /* we are going to change the media type, so the Link
+ * will be temporary down and we need to reflect that
+ * here. When the Link comes up again, it will be
+ * sensed by the sis_timer procedure, which also does
+ * all the rest for us */
+ netif_carrier_off(dev);
+
+ /* set Speed to 100Mbps */
+ /* disable auto negotiation and enable 100MBit Mode */
+ status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
+ mdio_write(dev, mii_phy->phy_addr,
+ MII_CONTROL, (status & ~MII_CNTL_SPEED) |
+ MII_CNTL_SPEED);
+
+ break;
+
+ case IF_PORT_10BASE2: /* 10Base2 */
+ case IF_PORT_AUI: /* AUI */
+ case IF_PORT_100BASEFX: /* 100BaseFx */
+ /* These Modes are not supported (are they?)*/
+ return -EOPNOTSUPP;
+
+ default:
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+/**
+ * sis900_mcast_bitnr - compute hashtable index
+ * @addr: multicast address
+ * @revision: revision id of chip
+ *
+ * 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 inline u16 sis900_mcast_bitnr(u8 *addr, u8 revision)
+{
+
+ u32 crc = ether_crc(6, addr);
+
+ /* 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);
+}
+
+/**
+ * set_rx_mode - Set SiS900 receive mode
+ * @net_dev: the net device to be set
+ *
+ * Set SiS900 receive mode for promiscuous, multicast, or broadcast mode.
+ * And set the appropriate multicast filter.
+ * Multicast hash table changes from 128 to 256 bits for 635M/B & 900B0.
+ */
+
+static void set_rx_mode(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u16 mc_filter[16] = {0}; /* 256/128 bits multicast hash table */
+ int i, table_entries;
+ u32 rx_mode;
+
+ /* 635 Hash Table entries = 256(2^16) */
+ if((sis_priv->chipset_rev >= SIS635A_900_REV) ||
+ (sis_priv->chipset_rev == 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 ((netdev_mc_count(net_dev) > multicast_filter_limit) ||
+ (net_dev->flags & IFF_ALLMULTI)) {
+ /* too many multicast addresses or accept all multicast packet */
+ rx_mode = RFAAB | RFAAM;
+ for (i = 0; i < table_entries; i++)
+ mc_filter[i] = 0xffff;
+ } else {
+ /* Accept Broadcast packet, destination address matchs our
+ * MAC address, use Receive Filter to reject unwanted MCAST
+ * packets */
+ struct netdev_hw_addr *ha;
+ rx_mode = RFAAB;
+
+ netdev_for_each_mc_addr(ha, net_dev) {
+ unsigned int bit_nr;
+
+ bit_nr = sis900_mcast_bitnr(ha->addr,
+ sis_priv->chipset_rev);
+ mc_filter[bit_nr >> 4] |= (1 << (bit_nr & 0xf));
+ }
+ }
+
+ /* 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. */
+ sw32(rfcr, (u32)(0x00000004 + i) << RFADDR_shift);
+ sw32(rfdr, mc_filter[i]);
+ }
+
+ sw32(rfcr, RFEN | rx_mode);
+
+ /* sis900 is capable of looping back packets 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 = sr32(cr);
+ sw32(cr, cr_saved | TxDIS | RxDIS);
+ /* enable loopback */
+ sw32(txcfg, sr32(txcfg) | TxMLB);
+ sw32(rxcfg, sr32(rxcfg) | RxATX);
+ /* restore cr */
+ sw32(cr, cr_saved);
+ }
+}
+
+/**
+ * sis900_reset - Reset sis900 MAC
+ * @net_dev: the net device to reset
+ *
+ * reset sis900 MAC and wait until finished
+ * reset through command register
+ * change backoff algorithm for 900B0 & 635 M/B
+ */
+
+static void sis900_reset(struct net_device *net_dev)
+{
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+ u32 status = TxRCMP | RxRCMP;
+ int i;
+
+ sw32(ier, 0);
+ sw32(imr, 0);
+ sw32(rfcr, 0);
+
+ sw32(cr, RxRESET | TxRESET | RESET | sr32(cr));
+
+ /* Check that the chip has finished the reset. */
+ for (i = 0; status && (i < 1000); i++)
+ status ^= sr32(isr) & status;
+
+ if (sis_priv->chipset_rev >= SIS635A_900_REV ||
+ sis_priv->chipset_rev == SIS900B_900_REV)
+ sw32(cfg, PESEL | RND_CNT);
+ else
+ sw32(cfg, PESEL);
+}
+
+/**
+ * sis900_remove - Remove sis900 device
+ * @pci_dev: the pci device to be removed
+ *
+ * remove and release SiS900 net device
+ */
+
+static void sis900_remove(struct pci_dev *pci_dev)
+{
+ struct net_device *net_dev = pci_get_drvdata(pci_dev);
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+
+ unregister_netdev(net_dev);
+
+ while (sis_priv->first_mii) {
+ struct mii_phy *phy = sis_priv->first_mii;
+
+ sis_priv->first_mii = phy->next;
+ kfree(phy);
+ }
+
+ dma_free_coherent(&pci_dev->dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
+ sis_priv->rx_ring_dma);
+ dma_free_coherent(&pci_dev->dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
+ sis_priv->tx_ring_dma);
+ pci_iounmap(pci_dev, sis_priv->ioaddr);
+ free_netdev(net_dev);
+}
+
+static int __maybe_unused sis900_suspend(struct device *dev)
+{
+ struct net_device *net_dev = dev_get_drvdata(dev);
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+
+ if(!netif_running(net_dev))
+ return 0;
+
+ netif_stop_queue(net_dev);
+ netif_device_detach(net_dev);
+
+ /* Stop the chip's Tx and Rx Status Machine */
+ sw32(cr, RxDIS | TxDIS | sr32(cr));
+
+ return 0;
+}
+
+static int __maybe_unused sis900_resume(struct device *dev)
+{
+ struct net_device *net_dev = dev_get_drvdata(dev);
+ struct sis900_private *sis_priv = netdev_priv(net_dev);
+ void __iomem *ioaddr = sis_priv->ioaddr;
+
+ if(!netif_running(net_dev))
+ return 0;
+
+ sis900_init_rxfilter(net_dev);
+
+ sis900_init_tx_ring(net_dev);
+ sis900_init_rx_ring(net_dev);
+
+ set_rx_mode(net_dev);
+
+ netif_device_attach(net_dev);
+ netif_start_queue(net_dev);
+
+ /* Workaround for EDB */
+ sis900_set_mode(sis_priv, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
+
+ /* Enable all known interrupts by setting the interrupt mask. */
+ sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxDESC);
+ sw32(cr, RxENA | sr32(cr));
+ sw32(ier, IE);
+
+ sis900_check_mode(net_dev, sis_priv->mii);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(sis900_pm_ops, sis900_suspend, sis900_resume);
+
+static struct pci_driver sis900_pci_driver = {
+ .name = SIS900_MODULE_NAME,
+ .id_table = sis900_pci_tbl,
+ .probe = sis900_probe,
+ .remove = sis900_remove,
+ .driver.pm = &sis900_pm_ops,
+};
+
+static int __init sis900_init_module(void)
+{
+/* when a module, this is printed whether or not devices are found in probe */
+#ifdef MODULE
+ printk(version);
+#endif
+
+ return pci_register_driver(&sis900_pci_driver);
+}
+
+static void __exit sis900_cleanup_module(void)
+{
+ pci_unregister_driver(&sis900_pci_driver);
+}
+
+module_init(sis900_init_module);
+module_exit(sis900_cleanup_module);
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 02:30:31 +0000