diff options
Diffstat (limited to 'drivers/net/ethernet/silan/sc92031.c')
| -rw-r--r-- | drivers/net/ethernet/silan/sc92031.c | 1594 |
1 files changed, 1594 insertions, 0 deletions
diff --git a/drivers/net/ethernet/silan/sc92031.c b/drivers/net/ethernet/silan/sc92031.c new file mode 100644 index 000000000..c07fd594f --- /dev/null +++ b/drivers/net/ethernet/silan/sc92031.c @@ -0,0 +1,1594 @@ +/* Silan SC92031 PCI Fast Ethernet Adapter driver + * + * Based on vendor drivers: + * Silan Fast Ethernet Netcard Driver: + * MODULE_AUTHOR ("gaoyonghong"); + * MODULE_DESCRIPTION ("SILAN Fast Ethernet driver"); + * MODULE_LICENSE("GPL"); + * 8139D Fast Ethernet driver: + * (C) 2002 by gaoyonghong + * MODULE_AUTHOR ("gaoyonghong"); + * MODULE_DESCRIPTION ("Rsltek 8139D PCI Fast Ethernet Adapter driver"); + * MODULE_LICENSE("GPL"); + * Both are almost identical and seem to be based on pci-skeleton.c + * + * Rewritten for 2.6 by Cesar Eduardo Barros + * + * A datasheet for this chip can be found at + * http://www.silan.com.cn/english/product/pdf/SC92031AY.pdf + */ + +/* Note about set_mac_address: I don't know how to change the hardware + * matching, so you need to enable IFF_PROMISC when using it. + */ + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/crc32.h> + +#include <asm/irq.h> + +#define SC92031_NAME "sc92031" + +/* BAR 0 is MMIO, BAR 1 is PIO */ +#define SC92031_USE_PIO 0 + +/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast). */ +static int multicast_filter_limit = 64; +module_param(multicast_filter_limit, int, 0); +MODULE_PARM_DESC(multicast_filter_limit, + "Maximum number of filtered multicast addresses"); + +static int media; +module_param(media, int, 0); +MODULE_PARM_DESC(media, "Media type (0x00 = autodetect," + " 0x01 = 10M half, 0x02 = 10M full," + " 0x04 = 100M half, 0x08 = 100M full)"); + +/* Size of the in-memory receive ring. */ +#define RX_BUF_LEN_IDX 3 /* 0==8K, 1==16K, 2==32K, 3==64K ,4==128K*/ +#define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX) + +/* Number of Tx descriptor registers. */ +#define NUM_TX_DESC 4 + +/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/ +#define MAX_ETH_FRAME_SIZE 1536 + +/* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */ +#define TX_BUF_SIZE MAX_ETH_FRAME_SIZE +#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC) + +/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */ +#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */ + +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (4*HZ) + +#define SILAN_STATS_NUM 2 /* number of ETHTOOL_GSTATS */ + +/* media options */ +#define AUTOSELECT 0x00 +#define M10_HALF 0x01 +#define M10_FULL 0x02 +#define M100_HALF 0x04 +#define M100_FULL 0x08 + + /* Symbolic offsets to registers. */ +enum silan_registers { + Config0 = 0x00, // Config0 + Config1 = 0x04, // Config1 + RxBufWPtr = 0x08, // Rx buffer writer poiter + IntrStatus = 0x0C, // Interrupt status + IntrMask = 0x10, // Interrupt mask + RxbufAddr = 0x14, // Rx buffer start address + RxBufRPtr = 0x18, // Rx buffer read pointer + Txstatusall = 0x1C, // Transmit status of all descriptors + TxStatus0 = 0x20, // Transmit status (Four 32bit registers). + TxAddr0 = 0x30, // Tx descriptors (also four 32bit). + RxConfig = 0x40, // Rx configuration + MAC0 = 0x44, // Ethernet hardware address. + MAR0 = 0x4C, // Multicast filter. + RxStatus0 = 0x54, // Rx status + TxConfig = 0x5C, // Tx configuration + PhyCtrl = 0x60, // physical control + FlowCtrlConfig = 0x64, // flow control + Miicmd0 = 0x68, // Mii command0 register + Miicmd1 = 0x6C, // Mii command1 register + Miistatus = 0x70, // Mii status register + Timercnt = 0x74, // Timer counter register + TimerIntr = 0x78, // Timer interrupt register + PMConfig = 0x7C, // Power Manager configuration + CRC0 = 0x80, // Power Manager CRC ( Two 32bit regisers) + Wakeup0 = 0x88, // power Manager wakeup( Eight 64bit regiser) + LSBCRC0 = 0xC8, // power Manager LSBCRC(Two 32bit regiser) + TestD0 = 0xD0, + TestD4 = 0xD4, + TestD8 = 0xD8, +}; + +#define MII_JAB 16 +#define MII_OutputStatus 24 + +#define PHY_16_JAB_ENB 0x1000 +#define PHY_16_PORT_ENB 0x1 + +enum IntrStatusBits { + LinkFail = 0x80000000, + LinkOK = 0x40000000, + TimeOut = 0x20000000, + RxOverflow = 0x0040, + RxOK = 0x0020, + TxOK = 0x0001, + IntrBits = LinkFail|LinkOK|TimeOut|RxOverflow|RxOK|TxOK, +}; + +enum TxStatusBits { + TxCarrierLost = 0x20000000, + TxAborted = 0x10000000, + TxOutOfWindow = 0x08000000, + TxNccShift = 22, + EarlyTxThresShift = 16, + TxStatOK = 0x8000, + TxUnderrun = 0x4000, + TxOwn = 0x2000, +}; + +enum RxStatusBits { + RxStatesOK = 0x80000, + RxBadAlign = 0x40000, + RxHugeFrame = 0x20000, + RxSmallFrame = 0x10000, + RxCRCOK = 0x8000, + RxCrlFrame = 0x4000, + Rx_Broadcast = 0x2000, + Rx_Multicast = 0x1000, + RxAddrMatch = 0x0800, + MiiErr = 0x0400, +}; + +enum RxConfigBits { + RxFullDx = 0x80000000, + RxEnb = 0x40000000, + RxSmall = 0x20000000, + RxHuge = 0x10000000, + RxErr = 0x08000000, + RxAllphys = 0x04000000, + RxMulticast = 0x02000000, + RxBroadcast = 0x01000000, + RxLoopBack = (1 << 23) | (1 << 22), + LowThresholdShift = 12, + HighThresholdShift = 2, +}; + +enum TxConfigBits { + TxFullDx = 0x80000000, + TxEnb = 0x40000000, + TxEnbPad = 0x20000000, + TxEnbHuge = 0x10000000, + TxEnbFCS = 0x08000000, + TxNoBackOff = 0x04000000, + TxEnbPrem = 0x02000000, + TxCareLostCrs = 0x1000000, + TxExdCollNum = 0xf00000, + TxDataRate = 0x80000, +}; + +enum PhyCtrlconfigbits { + PhyCtrlAne = 0x80000000, + PhyCtrlSpd100 = 0x40000000, + PhyCtrlSpd10 = 0x20000000, + PhyCtrlPhyBaseAddr = 0x1f000000, + PhyCtrlDux = 0x800000, + PhyCtrlReset = 0x400000, +}; + +enum FlowCtrlConfigBits { + FlowCtrlFullDX = 0x80000000, + FlowCtrlEnb = 0x40000000, +}; + +enum Config0Bits { + Cfg0_Reset = 0x80000000, + Cfg0_Anaoff = 0x40000000, + Cfg0_LDPS = 0x20000000, +}; + +enum Config1Bits { + Cfg1_EarlyRx = 1 << 31, + Cfg1_EarlyTx = 1 << 30, + + //rx buffer size + Cfg1_Rcv8K = 0x0, + Cfg1_Rcv16K = 0x1, + Cfg1_Rcv32K = 0x3, + Cfg1_Rcv64K = 0x7, + Cfg1_Rcv128K = 0xf, +}; + +enum MiiCmd0Bits { + Mii_Divider = 0x20000000, + Mii_WRITE = 0x400000, + Mii_READ = 0x200000, + Mii_SCAN = 0x100000, + Mii_Tamod = 0x80000, + Mii_Drvmod = 0x40000, + Mii_mdc = 0x20000, + Mii_mdoen = 0x10000, + Mii_mdo = 0x8000, + Mii_mdi = 0x4000, +}; + +enum MiiStatusBits { + Mii_StatusBusy = 0x80000000, +}; + +enum PMConfigBits { + PM_Enable = 1 << 31, + PM_LongWF = 1 << 30, + PM_Magic = 1 << 29, + PM_LANWake = 1 << 28, + PM_LWPTN = (1 << 27 | 1<< 26), + PM_LinkUp = 1 << 25, + PM_WakeUp = 1 << 24, +}; + +/* Locking rules: + * priv->lock protects most of the fields of priv and most of the + * hardware registers. It does not have to protect against softirqs + * between sc92031_disable_interrupts and sc92031_enable_interrupts; + * it also does not need to be used in ->open and ->stop while the + * device interrupts are off. + * Not having to protect against softirqs is very useful due to heavy + * use of mdelay() at _sc92031_reset. + * Functions prefixed with _sc92031_ must be called with the lock held; + * functions prefixed with sc92031_ must be called without the lock held. + * Use mmiowb() before unlocking if the hardware was written to. + */ + +/* Locking rules for the interrupt: + * - the interrupt and the tasklet never run at the same time + * - neither run between sc92031_disable_interrupts and + * sc92031_enable_interrupt + */ + +struct sc92031_priv { + spinlock_t lock; + /* iomap.h cookie */ + void __iomem *port_base; + /* pci device structure */ + struct pci_dev *pdev; + /* tasklet */ + struct tasklet_struct tasklet; + + /* CPU address of rx ring */ + void *rx_ring; + /* PCI address of rx ring */ + dma_addr_t rx_ring_dma_addr; + /* PCI address of rx ring read pointer */ + dma_addr_t rx_ring_tail; + + /* tx ring write index */ + unsigned tx_head; + /* tx ring read index */ + unsigned tx_tail; + /* CPU address of tx bounce buffer */ + void *tx_bufs; + /* PCI address of tx bounce buffer */ + dma_addr_t tx_bufs_dma_addr; + + /* copies of some hardware registers */ + u32 intr_status; + atomic_t intr_mask; + u32 rx_config; + u32 tx_config; + u32 pm_config; + + /* copy of some flags from dev->flags */ + unsigned int mc_flags; + + /* for ETHTOOL_GSTATS */ + u64 tx_timeouts; + u64 rx_loss; + + /* for dev->get_stats */ + long rx_value; +}; + +/* I don't know which registers can be safely read; however, I can guess + * MAC0 is one of them. */ +static inline void _sc92031_dummy_read(void __iomem *port_base) +{ + ioread32(port_base + MAC0); +} + +static u32 _sc92031_mii_wait(void __iomem *port_base) +{ + u32 mii_status; + + do { + udelay(10); + mii_status = ioread32(port_base + Miistatus); + } while (mii_status & Mii_StatusBusy); + + return mii_status; +} + +static u32 _sc92031_mii_cmd(void __iomem *port_base, u32 cmd0, u32 cmd1) +{ + iowrite32(Mii_Divider, port_base + Miicmd0); + + _sc92031_mii_wait(port_base); + + iowrite32(cmd1, port_base + Miicmd1); + iowrite32(Mii_Divider | cmd0, port_base + Miicmd0); + + return _sc92031_mii_wait(port_base); +} + +static void _sc92031_mii_scan(void __iomem *port_base) +{ + _sc92031_mii_cmd(port_base, Mii_SCAN, 0x1 << 6); +} + +static u16 _sc92031_mii_read(void __iomem *port_base, unsigned reg) +{ + return _sc92031_mii_cmd(port_base, Mii_READ, reg << 6) >> 13; +} + +static void _sc92031_mii_write(void __iomem *port_base, unsigned reg, u16 val) +{ + _sc92031_mii_cmd(port_base, Mii_WRITE, (reg << 6) | ((u32)val << 11)); +} + +static void sc92031_disable_interrupts(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + /* tell the tasklet/interrupt not to enable interrupts */ + atomic_set(&priv->intr_mask, 0); + wmb(); + + /* stop interrupts */ + iowrite32(0, port_base + IntrMask); + _sc92031_dummy_read(port_base); + mmiowb(); + + /* wait for any concurrent interrupt/tasklet to finish */ + synchronize_irq(priv->pdev->irq); + tasklet_disable(&priv->tasklet); +} + +static void sc92031_enable_interrupts(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + tasklet_enable(&priv->tasklet); + + atomic_set(&priv->intr_mask, IntrBits); + wmb(); + + iowrite32(IntrBits, port_base + IntrMask); + mmiowb(); +} + +static void _sc92031_disable_tx_rx(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + priv->rx_config &= ~RxEnb; + priv->tx_config &= ~TxEnb; + iowrite32(priv->rx_config, port_base + RxConfig); + iowrite32(priv->tx_config, port_base + TxConfig); +} + +static void _sc92031_enable_tx_rx(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + priv->rx_config |= RxEnb; + priv->tx_config |= TxEnb; + iowrite32(priv->rx_config, port_base + RxConfig); + iowrite32(priv->tx_config, port_base + TxConfig); +} + +static void _sc92031_tx_clear(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + + while (priv->tx_head - priv->tx_tail > 0) { + priv->tx_tail++; + dev->stats.tx_dropped++; + } + priv->tx_head = priv->tx_tail = 0; +} + +static void _sc92031_set_mar(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 mar0 = 0, mar1 = 0; + + if ((dev->flags & IFF_PROMISC) || + netdev_mc_count(dev) > multicast_filter_limit || + (dev->flags & IFF_ALLMULTI)) + mar0 = mar1 = 0xffffffff; + else if (dev->flags & IFF_MULTICAST) { + struct netdev_hw_addr *ha; + + netdev_for_each_mc_addr(ha, dev) { + u32 crc; + unsigned bit = 0; + + crc = ~ether_crc(ETH_ALEN, ha->addr); + crc >>= 24; + + if (crc & 0x01) bit |= 0x02; + if (crc & 0x02) bit |= 0x01; + if (crc & 0x10) bit |= 0x20; + if (crc & 0x20) bit |= 0x10; + if (crc & 0x40) bit |= 0x08; + if (crc & 0x80) bit |= 0x04; + + if (bit > 31) + mar0 |= 0x1 << (bit - 32); + else + mar1 |= 0x1 << bit; + } + } + + iowrite32(mar0, port_base + MAR0); + iowrite32(mar1, port_base + MAR0 + 4); +} + +static void _sc92031_set_rx_config(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + unsigned int old_mc_flags; + u32 rx_config_bits = 0; + + old_mc_flags = priv->mc_flags; + + if (dev->flags & IFF_PROMISC) + rx_config_bits |= RxSmall | RxHuge | RxErr | RxBroadcast + | RxMulticast | RxAllphys; + + if (dev->flags & (IFF_ALLMULTI | IFF_MULTICAST)) + rx_config_bits |= RxMulticast; + + if (dev->flags & IFF_BROADCAST) + rx_config_bits |= RxBroadcast; + + priv->rx_config &= ~(RxSmall | RxHuge | RxErr | RxBroadcast + | RxMulticast | RxAllphys); + priv->rx_config |= rx_config_bits; + + priv->mc_flags = dev->flags & (IFF_PROMISC | IFF_ALLMULTI + | IFF_MULTICAST | IFF_BROADCAST); + + if (netif_carrier_ok(dev) && priv->mc_flags != old_mc_flags) + iowrite32(priv->rx_config, port_base + RxConfig); +} + +static bool _sc92031_check_media(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u16 bmsr; + + bmsr = _sc92031_mii_read(port_base, MII_BMSR); + rmb(); + if (bmsr & BMSR_LSTATUS) { + bool speed_100, duplex_full; + u32 flow_ctrl_config = 0; + u16 output_status = _sc92031_mii_read(port_base, + MII_OutputStatus); + _sc92031_mii_scan(port_base); + + speed_100 = output_status & 0x2; + duplex_full = output_status & 0x4; + + /* Initial Tx/Rx configuration */ + priv->rx_config = (0x40 << LowThresholdShift) | (0x1c0 << HighThresholdShift); + priv->tx_config = 0x48800000; + + /* NOTE: vendor driver had dead code here to enable tx padding */ + + if (!speed_100) + priv->tx_config |= 0x80000; + + // configure rx mode + _sc92031_set_rx_config(dev); + + if (duplex_full) { + priv->rx_config |= RxFullDx; + priv->tx_config |= TxFullDx; + flow_ctrl_config = FlowCtrlFullDX | FlowCtrlEnb; + } else { + priv->rx_config &= ~RxFullDx; + priv->tx_config &= ~TxFullDx; + } + + _sc92031_set_mar(dev); + _sc92031_set_rx_config(dev); + _sc92031_enable_tx_rx(dev); + iowrite32(flow_ctrl_config, port_base + FlowCtrlConfig); + + netif_carrier_on(dev); + + if (printk_ratelimit()) + printk(KERN_INFO "%s: link up, %sMbps, %s-duplex\n", + dev->name, + speed_100 ? "100" : "10", + duplex_full ? "full" : "half"); + return true; + } else { + _sc92031_mii_scan(port_base); + + netif_carrier_off(dev); + + _sc92031_disable_tx_rx(dev); + + if (printk_ratelimit()) + printk(KERN_INFO "%s: link down\n", dev->name); + return false; + } +} + +static void _sc92031_phy_reset(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 phy_ctrl; + + phy_ctrl = ioread32(port_base + PhyCtrl); + phy_ctrl &= ~(PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10); + phy_ctrl |= PhyCtrlAne | PhyCtrlReset; + + switch (media) { + default: + case AUTOSELECT: + phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10; + break; + case M10_HALF: + phy_ctrl |= PhyCtrlSpd10; + break; + case M10_FULL: + phy_ctrl |= PhyCtrlDux | PhyCtrlSpd10; + break; + case M100_HALF: + phy_ctrl |= PhyCtrlSpd100; + break; + case M100_FULL: + phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100; + break; + } + + iowrite32(phy_ctrl, port_base + PhyCtrl); + mdelay(10); + + phy_ctrl &= ~PhyCtrlReset; + iowrite32(phy_ctrl, port_base + PhyCtrl); + mdelay(1); + + _sc92031_mii_write(port_base, MII_JAB, + PHY_16_JAB_ENB | PHY_16_PORT_ENB); + _sc92031_mii_scan(port_base); + + netif_carrier_off(dev); + netif_stop_queue(dev); +} + +static void _sc92031_reset(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + /* disable PM */ + iowrite32(0, port_base + PMConfig); + + /* soft reset the chip */ + iowrite32(Cfg0_Reset, port_base + Config0); + mdelay(200); + + iowrite32(0, port_base + Config0); + mdelay(10); + + /* disable interrupts */ + iowrite32(0, port_base + IntrMask); + + /* clear multicast address */ + iowrite32(0, port_base + MAR0); + iowrite32(0, port_base + MAR0 + 4); + + /* init rx ring */ + iowrite32(priv->rx_ring_dma_addr, port_base + RxbufAddr); + priv->rx_ring_tail = priv->rx_ring_dma_addr; + + /* init tx ring */ + _sc92031_tx_clear(dev); + + /* clear old register values */ + priv->intr_status = 0; + atomic_set(&priv->intr_mask, 0); + priv->rx_config = 0; + priv->tx_config = 0; + priv->mc_flags = 0; + + /* configure rx buffer size */ + /* NOTE: vendor driver had dead code here to enable early tx/rx */ + iowrite32(Cfg1_Rcv64K, port_base + Config1); + + _sc92031_phy_reset(dev); + _sc92031_check_media(dev); + + /* calculate rx fifo overflow */ + priv->rx_value = 0; + + /* enable PM */ + iowrite32(priv->pm_config, port_base + PMConfig); + + /* clear intr register */ + ioread32(port_base + IntrStatus); +} + +static void _sc92031_tx_tasklet(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + unsigned old_tx_tail; + unsigned entry; + u32 tx_status; + + old_tx_tail = priv->tx_tail; + while (priv->tx_head - priv->tx_tail > 0) { + entry = priv->tx_tail % NUM_TX_DESC; + tx_status = ioread32(port_base + TxStatus0 + entry * 4); + + if (!(tx_status & (TxStatOK | TxUnderrun | TxAborted))) + break; + + priv->tx_tail++; + + if (tx_status & TxStatOK) { + dev->stats.tx_bytes += tx_status & 0x1fff; + dev->stats.tx_packets++; + /* Note: TxCarrierLost is always asserted at 100mbps. */ + dev->stats.collisions += (tx_status >> 22) & 0xf; + } + + if (tx_status & (TxOutOfWindow | TxAborted)) { + dev->stats.tx_errors++; + + if (tx_status & TxAborted) + dev->stats.tx_aborted_errors++; + + if (tx_status & TxCarrierLost) + dev->stats.tx_carrier_errors++; + + if (tx_status & TxOutOfWindow) + dev->stats.tx_window_errors++; + } + + if (tx_status & TxUnderrun) + dev->stats.tx_fifo_errors++; + } + + if (priv->tx_tail != old_tx_tail) + if (netif_queue_stopped(dev)) + netif_wake_queue(dev); +} + +static void _sc92031_rx_tasklet_error(struct net_device *dev, + u32 rx_status, unsigned rx_size) +{ + if(rx_size > (MAX_ETH_FRAME_SIZE + 4) || rx_size < 16) { + dev->stats.rx_errors++; + dev->stats.rx_length_errors++; + } + + if (!(rx_status & RxStatesOK)) { + dev->stats.rx_errors++; + + if (rx_status & (RxHugeFrame | RxSmallFrame)) + dev->stats.rx_length_errors++; + + if (rx_status & RxBadAlign) + dev->stats.rx_frame_errors++; + + if (!(rx_status & RxCRCOK)) + dev->stats.rx_crc_errors++; + } else { + struct sc92031_priv *priv = netdev_priv(dev); + priv->rx_loss++; + } +} + +static void _sc92031_rx_tasklet(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + dma_addr_t rx_ring_head; + unsigned rx_len; + unsigned rx_ring_offset; + void *rx_ring = priv->rx_ring; + + rx_ring_head = ioread32(port_base + RxBufWPtr); + rmb(); + + /* rx_ring_head is only 17 bits in the RxBufWPtr register. + * we need to change it to 32 bits physical address + */ + rx_ring_head &= (dma_addr_t)(RX_BUF_LEN - 1); + rx_ring_head |= priv->rx_ring_dma_addr & ~(dma_addr_t)(RX_BUF_LEN - 1); + if (rx_ring_head < priv->rx_ring_dma_addr) + rx_ring_head += RX_BUF_LEN; + + if (rx_ring_head >= priv->rx_ring_tail) + rx_len = rx_ring_head - priv->rx_ring_tail; + else + rx_len = RX_BUF_LEN - (priv->rx_ring_tail - rx_ring_head); + + if (!rx_len) + return; + + if (unlikely(rx_len > RX_BUF_LEN)) { + if (printk_ratelimit()) + printk(KERN_ERR "%s: rx packets length > rx buffer\n", + dev->name); + return; + } + + rx_ring_offset = (priv->rx_ring_tail - priv->rx_ring_dma_addr) % RX_BUF_LEN; + + while (rx_len) { + u32 rx_status; + unsigned rx_size, rx_size_align, pkt_size; + struct sk_buff *skb; + + rx_status = le32_to_cpup((__le32 *)(rx_ring + rx_ring_offset)); + rmb(); + + rx_size = rx_status >> 20; + rx_size_align = (rx_size + 3) & ~3; // for 4 bytes aligned + pkt_size = rx_size - 4; // Omit the four octet CRC from the length. + + rx_ring_offset = (rx_ring_offset + 4) % RX_BUF_LEN; + + if (unlikely(rx_status == 0 || + rx_size > (MAX_ETH_FRAME_SIZE + 4) || + rx_size < 16 || + !(rx_status & RxStatesOK))) { + _sc92031_rx_tasklet_error(dev, rx_status, rx_size); + break; + } + + if (unlikely(rx_size_align + 4 > rx_len)) { + if (printk_ratelimit()) + printk(KERN_ERR "%s: rx_len is too small\n", dev->name); + break; + } + + rx_len -= rx_size_align + 4; + + skb = netdev_alloc_skb_ip_align(dev, pkt_size); + if (unlikely(!skb)) { + if (printk_ratelimit()) + printk(KERN_ERR "%s: Couldn't allocate a skb_buff for a packet of size %u\n", + dev->name, pkt_size); + goto next; + } + + if ((rx_ring_offset + pkt_size) > RX_BUF_LEN) { + skb_put_data(skb, rx_ring + rx_ring_offset, + RX_BUF_LEN - rx_ring_offset); + skb_put_data(skb, rx_ring, + pkt_size - (RX_BUF_LEN - rx_ring_offset)); + } else { + skb_put_data(skb, rx_ring + rx_ring_offset, pkt_size); + } + + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + + dev->stats.rx_bytes += pkt_size; + dev->stats.rx_packets++; + + if (rx_status & Rx_Multicast) + dev->stats.multicast++; + + next: + rx_ring_offset = (rx_ring_offset + rx_size_align) % RX_BUF_LEN; + } + mb(); + + priv->rx_ring_tail = rx_ring_head; + iowrite32(priv->rx_ring_tail, port_base + RxBufRPtr); +} + +static void _sc92031_link_tasklet(struct net_device *dev) +{ + if (_sc92031_check_media(dev)) + netif_wake_queue(dev); + else { + netif_stop_queue(dev); + dev->stats.tx_carrier_errors++; + } +} + +static void sc92031_tasklet(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 intr_status, intr_mask; + + intr_status = priv->intr_status; + + spin_lock(&priv->lock); + + if (unlikely(!netif_running(dev))) + goto out; + + if (intr_status & TxOK) + _sc92031_tx_tasklet(dev); + + if (intr_status & RxOK) + _sc92031_rx_tasklet(dev); + + if (intr_status & RxOverflow) + dev->stats.rx_errors++; + + if (intr_status & TimeOut) { + dev->stats.rx_errors++; + dev->stats.rx_length_errors++; + } + + if (intr_status & (LinkFail | LinkOK)) + _sc92031_link_tasklet(dev); + +out: + intr_mask = atomic_read(&priv->intr_mask); + rmb(); + + iowrite32(intr_mask, port_base + IntrMask); + mmiowb(); + + spin_unlock(&priv->lock); +} + +static irqreturn_t sc92031_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 intr_status, intr_mask; + + /* mask interrupts before clearing IntrStatus */ + iowrite32(0, port_base + IntrMask); + _sc92031_dummy_read(port_base); + + intr_status = ioread32(port_base + IntrStatus); + if (unlikely(intr_status == 0xffffffff)) + return IRQ_NONE; // hardware has gone missing + + intr_status &= IntrBits; + if (!intr_status) + goto out_none; + + priv->intr_status = intr_status; + tasklet_schedule(&priv->tasklet); + + return IRQ_HANDLED; + +out_none: + intr_mask = atomic_read(&priv->intr_mask); + rmb(); + + iowrite32(intr_mask, port_base + IntrMask); + mmiowb(); + + return IRQ_NONE; +} + +static struct net_device_stats *sc92031_get_stats(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + + // FIXME I do not understand what is this trying to do. + if (netif_running(dev)) { + int temp; + + spin_lock_bh(&priv->lock); + + /* Update the error count. */ + temp = (ioread32(port_base + RxStatus0) >> 16) & 0xffff; + + if (temp == 0xffff) { + priv->rx_value += temp; + dev->stats.rx_fifo_errors = priv->rx_value; + } else + dev->stats.rx_fifo_errors = temp + priv->rx_value; + + spin_unlock_bh(&priv->lock); + } + + return &dev->stats; +} + +static netdev_tx_t sc92031_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + unsigned len; + unsigned entry; + u32 tx_status; + + if (unlikely(skb->len > TX_BUF_SIZE)) { + dev->stats.tx_dropped++; + goto out; + } + + spin_lock(&priv->lock); + + if (unlikely(!netif_carrier_ok(dev))) { + dev->stats.tx_dropped++; + goto out_unlock; + } + + BUG_ON(priv->tx_head - priv->tx_tail >= NUM_TX_DESC); + + entry = priv->tx_head++ % NUM_TX_DESC; + + skb_copy_and_csum_dev(skb, priv->tx_bufs + entry * TX_BUF_SIZE); + + len = skb->len; + if (len < ETH_ZLEN) { + memset(priv->tx_bufs + entry * TX_BUF_SIZE + len, + 0, ETH_ZLEN - len); + len = ETH_ZLEN; + } + + wmb(); + + if (len < 100) + tx_status = len; + else if (len < 300) + tx_status = 0x30000 | len; + else + tx_status = 0x50000 | len; + + iowrite32(priv->tx_bufs_dma_addr + entry * TX_BUF_SIZE, + port_base + TxAddr0 + entry * 4); + iowrite32(tx_status, port_base + TxStatus0 + entry * 4); + mmiowb(); + + if (priv->tx_head - priv->tx_tail >= NUM_TX_DESC) + netif_stop_queue(dev); + +out_unlock: + spin_unlock(&priv->lock); + +out: + dev_consume_skb_any(skb); + + return NETDEV_TX_OK; +} + +static int sc92031_open(struct net_device *dev) +{ + int err; + struct sc92031_priv *priv = netdev_priv(dev); + struct pci_dev *pdev = priv->pdev; + + priv->rx_ring = pci_alloc_consistent(pdev, RX_BUF_LEN, + &priv->rx_ring_dma_addr); + if (unlikely(!priv->rx_ring)) { + err = -ENOMEM; + goto out_alloc_rx_ring; + } + + priv->tx_bufs = pci_alloc_consistent(pdev, TX_BUF_TOT_LEN, + &priv->tx_bufs_dma_addr); + if (unlikely(!priv->tx_bufs)) { + err = -ENOMEM; + goto out_alloc_tx_bufs; + } + priv->tx_head = priv->tx_tail = 0; + + err = request_irq(pdev->irq, sc92031_interrupt, + IRQF_SHARED, dev->name, dev); + if (unlikely(err < 0)) + goto out_request_irq; + + priv->pm_config = 0; + + /* Interrupts already disabled by sc92031_stop or sc92031_probe */ + spin_lock_bh(&priv->lock); + + _sc92031_reset(dev); + mmiowb(); + + spin_unlock_bh(&priv->lock); + sc92031_enable_interrupts(dev); + + if (netif_carrier_ok(dev)) + netif_start_queue(dev); + else + netif_tx_disable(dev); + + return 0; + +out_request_irq: + pci_free_consistent(pdev, TX_BUF_TOT_LEN, priv->tx_bufs, + priv->tx_bufs_dma_addr); +out_alloc_tx_bufs: + pci_free_consistent(pdev, RX_BUF_LEN, priv->rx_ring, + priv->rx_ring_dma_addr); +out_alloc_rx_ring: + return err; +} + +static int sc92031_stop(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + struct pci_dev *pdev = priv->pdev; + + netif_tx_disable(dev); + + /* Disable interrupts, stop Tx and Rx. */ + sc92031_disable_interrupts(dev); + + spin_lock_bh(&priv->lock); + + _sc92031_disable_tx_rx(dev); + _sc92031_tx_clear(dev); + mmiowb(); + + spin_unlock_bh(&priv->lock); + + free_irq(pdev->irq, dev); + pci_free_consistent(pdev, TX_BUF_TOT_LEN, priv->tx_bufs, + priv->tx_bufs_dma_addr); + pci_free_consistent(pdev, RX_BUF_LEN, priv->rx_ring, + priv->rx_ring_dma_addr); + + return 0; +} + +static void sc92031_set_multicast_list(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + + spin_lock_bh(&priv->lock); + + _sc92031_set_mar(dev); + _sc92031_set_rx_config(dev); + mmiowb(); + + spin_unlock_bh(&priv->lock); +} + +static void sc92031_tx_timeout(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + + /* Disable interrupts by clearing the interrupt mask.*/ + sc92031_disable_interrupts(dev); + + spin_lock(&priv->lock); + + priv->tx_timeouts++; + + _sc92031_reset(dev); + mmiowb(); + + spin_unlock(&priv->lock); + + /* enable interrupts */ + sc92031_enable_interrupts(dev); + + if (netif_carrier_ok(dev)) + netif_wake_queue(dev); +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void sc92031_poll_controller(struct net_device *dev) +{ + struct sc92031_priv *priv = netdev_priv(dev); + const int irq = priv->pdev->irq; + + disable_irq(irq); + if (sc92031_interrupt(irq, dev) != IRQ_NONE) + sc92031_tasklet((unsigned long)dev); + enable_irq(irq); +} +#endif + +static int +sc92031_ethtool_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u8 phy_address; + u32 phy_ctrl; + u16 output_status; + u32 supported, advertising; + + spin_lock_bh(&priv->lock); + + phy_address = ioread32(port_base + Miicmd1) >> 27; + phy_ctrl = ioread32(port_base + PhyCtrl); + + output_status = _sc92031_mii_read(port_base, MII_OutputStatus); + _sc92031_mii_scan(port_base); + mmiowb(); + + spin_unlock_bh(&priv->lock); + + supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full + | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full + | SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII; + + advertising = ADVERTISED_TP | ADVERTISED_MII; + + if ((phy_ctrl & (PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10)) + == (PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10)) + advertising |= ADVERTISED_Autoneg; + + if ((phy_ctrl & PhyCtrlSpd10) == PhyCtrlSpd10) + advertising |= ADVERTISED_10baseT_Half; + + if ((phy_ctrl & (PhyCtrlSpd10 | PhyCtrlDux)) + == (PhyCtrlSpd10 | PhyCtrlDux)) + advertising |= ADVERTISED_10baseT_Full; + + if ((phy_ctrl & PhyCtrlSpd100) == PhyCtrlSpd100) + advertising |= ADVERTISED_100baseT_Half; + + if ((phy_ctrl & (PhyCtrlSpd100 | PhyCtrlDux)) + == (PhyCtrlSpd100 | PhyCtrlDux)) + advertising |= ADVERTISED_100baseT_Full; + + if (phy_ctrl & PhyCtrlAne) + advertising |= ADVERTISED_Autoneg; + + cmd->base.speed = (output_status & 0x2) ? SPEED_100 : SPEED_10; + cmd->base.duplex = (output_status & 0x4) ? DUPLEX_FULL : DUPLEX_HALF; + cmd->base.port = PORT_MII; + cmd->base.phy_address = phy_address; + cmd->base.autoneg = (phy_ctrl & PhyCtrlAne) ? + AUTONEG_ENABLE : AUTONEG_DISABLE; + + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, + supported); + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, + advertising); + + return 0; +} + +static int +sc92031_ethtool_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *cmd) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 speed = cmd->base.speed; + u32 phy_ctrl; + u32 old_phy_ctrl; + u32 advertising; + + ethtool_convert_link_mode_to_legacy_u32(&advertising, + cmd->link_modes.advertising); + + if (!(speed == SPEED_10 || speed == SPEED_100)) + return -EINVAL; + if (!(cmd->base.duplex == DUPLEX_HALF || + cmd->base.duplex == DUPLEX_FULL)) + return -EINVAL; + if (!(cmd->base.port == PORT_MII)) + return -EINVAL; + if (!(cmd->base.phy_address == 0x1f)) + return -EINVAL; + if (!(cmd->base.autoneg == AUTONEG_DISABLE || + cmd->base.autoneg == AUTONEG_ENABLE)) + return -EINVAL; + + if (cmd->base.autoneg == AUTONEG_ENABLE) { + if (!(advertising & (ADVERTISED_Autoneg + | ADVERTISED_100baseT_Full + | ADVERTISED_100baseT_Half + | ADVERTISED_10baseT_Full + | ADVERTISED_10baseT_Half))) + return -EINVAL; + + phy_ctrl = PhyCtrlAne; + + // FIXME: I'm not sure what the original code was trying to do + if (advertising & ADVERTISED_Autoneg) + phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10; + if (advertising & ADVERTISED_100baseT_Full) + phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100; + if (advertising & ADVERTISED_100baseT_Half) + phy_ctrl |= PhyCtrlSpd100; + if (advertising & ADVERTISED_10baseT_Full) + phy_ctrl |= PhyCtrlSpd10 | PhyCtrlDux; + if (advertising & ADVERTISED_10baseT_Half) + phy_ctrl |= PhyCtrlSpd10; + } else { + // FIXME: Whole branch guessed + phy_ctrl = 0; + + if (speed == SPEED_10) + phy_ctrl |= PhyCtrlSpd10; + else /* cmd->speed == SPEED_100 */ + phy_ctrl |= PhyCtrlSpd100; + + if (cmd->base.duplex == DUPLEX_FULL) + phy_ctrl |= PhyCtrlDux; + } + + spin_lock_bh(&priv->lock); + + old_phy_ctrl = ioread32(port_base + PhyCtrl); + phy_ctrl |= old_phy_ctrl & ~(PhyCtrlAne | PhyCtrlDux + | PhyCtrlSpd100 | PhyCtrlSpd10); + if (phy_ctrl != old_phy_ctrl) + iowrite32(phy_ctrl, port_base + PhyCtrl); + + spin_unlock_bh(&priv->lock); + + return 0; +} + +static void sc92031_ethtool_get_wol(struct net_device *dev, + struct ethtool_wolinfo *wolinfo) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 pm_config; + + spin_lock_bh(&priv->lock); + pm_config = ioread32(port_base + PMConfig); + spin_unlock_bh(&priv->lock); + + // FIXME: Guessed + wolinfo->supported = WAKE_PHY | WAKE_MAGIC + | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST; + wolinfo->wolopts = 0; + + if (pm_config & PM_LinkUp) + wolinfo->wolopts |= WAKE_PHY; + + if (pm_config & PM_Magic) + wolinfo->wolopts |= WAKE_MAGIC; + + if (pm_config & PM_WakeUp) + // FIXME: Guessed + wolinfo->wolopts |= WAKE_UCAST | WAKE_MCAST | WAKE_BCAST; +} + +static int sc92031_ethtool_set_wol(struct net_device *dev, + struct ethtool_wolinfo *wolinfo) +{ + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u32 pm_config; + + spin_lock_bh(&priv->lock); + + pm_config = ioread32(port_base + PMConfig) + & ~(PM_LinkUp | PM_Magic | PM_WakeUp); + + if (wolinfo->wolopts & WAKE_PHY) + pm_config |= PM_LinkUp; + + if (wolinfo->wolopts & WAKE_MAGIC) + pm_config |= PM_Magic; + + // FIXME: Guessed + if (wolinfo->wolopts & (WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)) + pm_config |= PM_WakeUp; + + priv->pm_config = pm_config; + iowrite32(pm_config, port_base + PMConfig); + mmiowb(); + + spin_unlock_bh(&priv->lock); + + return 0; +} + +static int sc92031_ethtool_nway_reset(struct net_device *dev) +{ + int err = 0; + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem *port_base = priv->port_base; + u16 bmcr; + + spin_lock_bh(&priv->lock); + + bmcr = _sc92031_mii_read(port_base, MII_BMCR); + if (!(bmcr & BMCR_ANENABLE)) { + err = -EINVAL; + goto out; + } + + _sc92031_mii_write(port_base, MII_BMCR, bmcr | BMCR_ANRESTART); + +out: + _sc92031_mii_scan(port_base); + mmiowb(); + + spin_unlock_bh(&priv->lock); + + return err; +} + +static const char sc92031_ethtool_stats_strings[SILAN_STATS_NUM][ETH_GSTRING_LEN] = { + "tx_timeout", + "rx_loss", +}; + +static void sc92031_ethtool_get_strings(struct net_device *dev, + u32 stringset, u8 *data) +{ + if (stringset == ETH_SS_STATS) + memcpy(data, sc92031_ethtool_stats_strings, + SILAN_STATS_NUM * ETH_GSTRING_LEN); +} + +static int sc92031_ethtool_get_sset_count(struct net_device *dev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return SILAN_STATS_NUM; + default: + return -EOPNOTSUPP; + } +} + +static void sc92031_ethtool_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, u64 *data) +{ + struct sc92031_priv *priv = netdev_priv(dev); + + spin_lock_bh(&priv->lock); + data[0] = priv->tx_timeouts; + data[1] = priv->rx_loss; + spin_unlock_bh(&priv->lock); +} + +static const struct ethtool_ops sc92031_ethtool_ops = { + .get_wol = sc92031_ethtool_get_wol, + .set_wol = sc92031_ethtool_set_wol, + .nway_reset = sc92031_ethtool_nway_reset, + .get_link = ethtool_op_get_link, + .get_strings = sc92031_ethtool_get_strings, + .get_sset_count = sc92031_ethtool_get_sset_count, + .get_ethtool_stats = sc92031_ethtool_get_ethtool_stats, + .get_link_ksettings = sc92031_ethtool_get_link_ksettings, + .set_link_ksettings = sc92031_ethtool_set_link_ksettings, +}; + + +static const struct net_device_ops sc92031_netdev_ops = { + .ndo_get_stats = sc92031_get_stats, + .ndo_start_xmit = sc92031_start_xmit, + .ndo_open = sc92031_open, + .ndo_stop = sc92031_stop, + .ndo_set_rx_mode = sc92031_set_multicast_list, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_tx_timeout = sc92031_tx_timeout, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = sc92031_poll_controller, +#endif +}; + +static int sc92031_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int err; + void __iomem* port_base; + struct net_device *dev; + struct sc92031_priv *priv; + u32 mac0, mac1; + + err = pci_enable_device(pdev); + if (unlikely(err < 0)) + goto out_enable_device; + + pci_set_master(pdev); + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (unlikely(err < 0)) + goto out_set_dma_mask; + + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); + if (unlikely(err < 0)) + goto out_set_dma_mask; + + err = pci_request_regions(pdev, SC92031_NAME); + if (unlikely(err < 0)) + goto out_request_regions; + + port_base = pci_iomap(pdev, SC92031_USE_PIO, 0); + if (unlikely(!port_base)) { + err = -EIO; + goto out_iomap; + } + + dev = alloc_etherdev(sizeof(struct sc92031_priv)); + if (unlikely(!dev)) { + err = -ENOMEM; + goto out_alloc_etherdev; + } + + pci_set_drvdata(pdev, dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + /* faked with skb_copy_and_csum_dev */ + dev->features = NETIF_F_SG | NETIF_F_HIGHDMA | + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + + dev->netdev_ops = &sc92031_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + dev->ethtool_ops = &sc92031_ethtool_ops; + + priv = netdev_priv(dev); + spin_lock_init(&priv->lock); + priv->port_base = port_base; + priv->pdev = pdev; + tasklet_init(&priv->tasklet, sc92031_tasklet, (unsigned long)dev); + /* Fudge tasklet count so the call to sc92031_enable_interrupts at + * sc92031_open will work correctly */ + tasklet_disable_nosync(&priv->tasklet); + + /* PCI PM Wakeup */ + iowrite32((~PM_LongWF & ~PM_LWPTN) | PM_Enable, port_base + PMConfig); + + mac0 = ioread32(port_base + MAC0); + mac1 = ioread32(port_base + MAC0 + 4); + dev->dev_addr[0] = mac0 >> 24; + dev->dev_addr[1] = mac0 >> 16; + dev->dev_addr[2] = mac0 >> 8; + dev->dev_addr[3] = mac0; + dev->dev_addr[4] = mac1 >> 8; + dev->dev_addr[5] = mac1; + + err = register_netdev(dev); + if (err < 0) + goto out_register_netdev; + + printk(KERN_INFO "%s: SC92031 at 0x%lx, %pM, IRQ %d\n", dev->name, + (long)pci_resource_start(pdev, SC92031_USE_PIO), dev->dev_addr, + pdev->irq); + + return 0; + +out_register_netdev: + free_netdev(dev); +out_alloc_etherdev: + pci_iounmap(pdev, port_base); +out_iomap: + pci_release_regions(pdev); +out_request_regions: +out_set_dma_mask: + pci_disable_device(pdev); +out_enable_device: + return err; +} + +static void sc92031_remove(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct sc92031_priv *priv = netdev_priv(dev); + void __iomem* port_base = priv->port_base; + + unregister_netdev(dev); + free_netdev(dev); + pci_iounmap(pdev, port_base); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static int sc92031_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct sc92031_priv *priv = netdev_priv(dev); + + pci_save_state(pdev); + + if (!netif_running(dev)) + goto out; + + netif_device_detach(dev); + + /* Disable interrupts, stop Tx and Rx. */ + sc92031_disable_interrupts(dev); + + spin_lock_bh(&priv->lock); + + _sc92031_disable_tx_rx(dev); + _sc92031_tx_clear(dev); + mmiowb(); + + spin_unlock_bh(&priv->lock); + +out: + pci_set_power_state(pdev, pci_choose_state(pdev, state)); + + return 0; +} + +static int sc92031_resume(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct sc92031_priv *priv = netdev_priv(dev); + + pci_restore_state(pdev); + pci_set_power_state(pdev, PCI_D0); + + if (!netif_running(dev)) + goto out; + + /* Interrupts already disabled by sc92031_suspend */ + spin_lock_bh(&priv->lock); + + _sc92031_reset(dev); + mmiowb(); + + spin_unlock_bh(&priv->lock); + sc92031_enable_interrupts(dev); + + netif_device_attach(dev); + + if (netif_carrier_ok(dev)) + netif_wake_queue(dev); + else + netif_tx_disable(dev); + +out: + return 0; +} + +static const struct pci_device_id sc92031_pci_device_id_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_SILAN, 0x2031) }, + { PCI_DEVICE(PCI_VENDOR_ID_SILAN, 0x8139) }, + { PCI_DEVICE(0x1088, 0x2031) }, + { 0, } +}; +MODULE_DEVICE_TABLE(pci, sc92031_pci_device_id_table); + +static struct pci_driver sc92031_pci_driver = { + .name = SC92031_NAME, + .id_table = sc92031_pci_device_id_table, + .probe = sc92031_probe, + .remove = sc92031_remove, + .suspend = sc92031_suspend, + .resume = sc92031_resume, +}; + +module_pci_driver(sc92031_pci_driver); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Cesar Eduardo Barros <cesarb@cesarb.net>"); +MODULE_DESCRIPTION("Silan SC92031 PCI Fast Ethernet Adapter driver"); |