diff options
Diffstat (limited to 'drivers/net/tsi108_eth.c')
| -rw-r--r-- | drivers/net/tsi108_eth.c | 1708 |
1 files changed, 1708 insertions, 0 deletions
diff --git a/drivers/net/tsi108_eth.c b/drivers/net/tsi108_eth.c new file mode 100644 index 00000000000..893808ab374 --- /dev/null +++ b/drivers/net/tsi108_eth.c @@ -0,0 +1,1708 @@ +/******************************************************************************* + + Copyright(c) 2006 Tundra Semiconductor Corporation. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + You should have received a copy of the GNU General Public License along with + this program; if not, write to the Free Software Foundation, Inc., 59 + Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*******************************************************************************/ + +/* This driver is based on the driver code originally developed + * for the Intel IOC80314 (ForestLake) Gigabit Ethernet by + * scott.wood@timesys.com * Copyright (C) 2003 TimeSys Corporation + * + * Currently changes from original version are: + * - porting to Tsi108-based platform and kernel 2.6 (kong.lai@tundra.com) + * - modifications to handle two ports independently and support for + * additional PHY devices (alexandre.bounine@tundra.com) + * - Get hardware information from platform device. (tie-fei.zang@freescale.com) + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/net.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include <linux/delay.h> +#include <linux/crc32.h> +#include <linux/mii.h> +#include <linux/device.h> +#include <linux/pci.h> +#include <linux/rtnetlink.h> +#include <linux/timer.h> +#include <linux/platform_device.h> +#include <linux/etherdevice.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/tsi108.h> + +#include "tsi108_eth.h" + +#define MII_READ_DELAY 10000 /* max link wait time in msec */ + +#define TSI108_RXRING_LEN 256 + +/* NOTE: The driver currently does not support receiving packets + * larger than the buffer size, so don't decrease this (unless you + * want to add such support). + */ +#define TSI108_RXBUF_SIZE 1536 + +#define TSI108_TXRING_LEN 256 + +#define TSI108_TX_INT_FREQ 64 + +/* Check the phy status every half a second. */ +#define CHECK_PHY_INTERVAL (HZ/2) + +static int tsi108_init_one(struct platform_device *pdev); +static int tsi108_ether_remove(struct platform_device *pdev); + +struct tsi108_prv_data { + void __iomem *regs; /* Base of normal regs */ + void __iomem *phyregs; /* Base of register bank used for PHY access */ + + unsigned int phy; /* Index of PHY for this interface */ + unsigned int irq_num; + unsigned int id; + + struct timer_list timer;/* Timer that triggers the check phy function */ + unsigned int rxtail; /* Next entry in rxring to read */ + unsigned int rxhead; /* Next entry in rxring to give a new buffer */ + unsigned int rxfree; /* Number of free, allocated RX buffers */ + + unsigned int rxpending; /* Non-zero if there are still descriptors + * to be processed from a previous descriptor + * interrupt condition that has been cleared */ + + unsigned int txtail; /* Next TX descriptor to check status on */ + unsigned int txhead; /* Next TX descriptor to use */ + + /* Number of free TX descriptors. This could be calculated from + * rxhead and rxtail if one descriptor were left unused to disambiguate + * full and empty conditions, but it's simpler to just keep track + * explicitly. */ + + unsigned int txfree; + + unsigned int phy_ok; /* The PHY is currently powered on. */ + + /* PHY status (duplex is 1 for half, 2 for full, + * so that the default 0 indicates that neither has + * yet been configured). */ + + unsigned int link_up; + unsigned int speed; + unsigned int duplex; + + tx_desc *txring; + rx_desc *rxring; + struct sk_buff *txskbs[TSI108_TXRING_LEN]; + struct sk_buff *rxskbs[TSI108_RXRING_LEN]; + + dma_addr_t txdma, rxdma; + + /* txlock nests in misclock and phy_lock */ + + spinlock_t txlock, misclock; + + /* stats is used to hold the upper bits of each hardware counter, + * and tmpstats is used to hold the full values for returning + * to the caller of get_stats(). They must be separate in case + * an overflow interrupt occurs before the stats are consumed. + */ + + struct net_device_stats stats; + struct net_device_stats tmpstats; + + /* These stats are kept separate in hardware, thus require individual + * fields for handling carry. They are combined in get_stats. + */ + + unsigned long rx_fcs; /* Add to rx_frame_errors */ + unsigned long rx_short_fcs; /* Add to rx_frame_errors */ + unsigned long rx_long_fcs; /* Add to rx_frame_errors */ + unsigned long rx_underruns; /* Add to rx_length_errors */ + unsigned long rx_overruns; /* Add to rx_length_errors */ + + unsigned long tx_coll_abort; /* Add to tx_aborted_errors/collisions */ + unsigned long tx_pause_drop; /* Add to tx_aborted_errors */ + + unsigned long mc_hash[16]; + u32 msg_enable; /* debug message level */ + struct mii_if_info mii_if; + unsigned int init_media; +}; + +/* Structure for a device driver */ + +static struct platform_driver tsi_eth_driver = { + .probe = tsi108_init_one, + .remove = tsi108_ether_remove, + .driver = { + .name = "tsi-ethernet", + }, +}; + +static void tsi108_timed_checker(unsigned long dev_ptr); + +static void dump_eth_one(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + + printk("Dumping %s...\n", dev->name); + printk("intstat %x intmask %x phy_ok %d" + " link %d speed %d duplex %d\n", + TSI_READ(TSI108_EC_INTSTAT), + TSI_READ(TSI108_EC_INTMASK), data->phy_ok, + data->link_up, data->speed, data->duplex); + + printk("TX: head %d, tail %d, free %d, stat %x, estat %x, err %x\n", + data->txhead, data->txtail, data->txfree, + TSI_READ(TSI108_EC_TXSTAT), + TSI_READ(TSI108_EC_TXESTAT), + TSI_READ(TSI108_EC_TXERR)); + + printk("RX: head %d, tail %d, free %d, stat %x," + " estat %x, err %x, pending %d\n\n", + data->rxhead, data->rxtail, data->rxfree, + TSI_READ(TSI108_EC_RXSTAT), + TSI_READ(TSI108_EC_RXESTAT), + TSI_READ(TSI108_EC_RXERR), data->rxpending); +} + +/* Synchronization is needed between the thread and up/down events. + * Note that the PHY is accessed through the same registers for both + * interfaces, so this can't be made interface-specific. + */ + +static DEFINE_SPINLOCK(phy_lock); + +static int tsi108_read_mii(struct tsi108_prv_data *data, int reg) +{ + unsigned i; + + TSI_WRITE_PHY(TSI108_MAC_MII_ADDR, + (data->phy << TSI108_MAC_MII_ADDR_PHY) | + (reg << TSI108_MAC_MII_ADDR_REG)); + TSI_WRITE_PHY(TSI108_MAC_MII_CMD, 0); + TSI_WRITE_PHY(TSI108_MAC_MII_CMD, TSI108_MAC_MII_CMD_READ); + for (i = 0; i < 100; i++) { + if (!(TSI_READ_PHY(TSI108_MAC_MII_IND) & + (TSI108_MAC_MII_IND_NOTVALID | TSI108_MAC_MII_IND_BUSY))) + break; + udelay(10); + } + + if (i == 100) + return 0xffff; + else + return (TSI_READ_PHY(TSI108_MAC_MII_DATAIN)); +} + +static void tsi108_write_mii(struct tsi108_prv_data *data, + int reg, u16 val) +{ + unsigned i = 100; + TSI_WRITE_PHY(TSI108_MAC_MII_ADDR, + (data->phy << TSI108_MAC_MII_ADDR_PHY) | + (reg << TSI108_MAC_MII_ADDR_REG)); + TSI_WRITE_PHY(TSI108_MAC_MII_DATAOUT, val); + while (i--) { + if(!(TSI_READ_PHY(TSI108_MAC_MII_IND) & + TSI108_MAC_MII_IND_BUSY)) + break; + udelay(10); + } +} + +static int tsi108_mdio_read(struct net_device *dev, int addr, int reg) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + return tsi108_read_mii(data, reg); +} + +static void tsi108_mdio_write(struct net_device *dev, int addr, int reg, int val) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + tsi108_write_mii(data, reg, val); +} + +static inline void tsi108_write_tbi(struct tsi108_prv_data *data, + int reg, u16 val) +{ + unsigned i = 1000; + TSI_WRITE(TSI108_MAC_MII_ADDR, + (0x1e << TSI108_MAC_MII_ADDR_PHY) + | (reg << TSI108_MAC_MII_ADDR_REG)); + TSI_WRITE(TSI108_MAC_MII_DATAOUT, val); + while(i--) { + if(!(TSI_READ(TSI108_MAC_MII_IND) & TSI108_MAC_MII_IND_BUSY)) + return; + udelay(10); + } + printk(KERN_ERR "%s function time out \n", __FUNCTION__); +} + +static int mii_speed(struct mii_if_info *mii) +{ + int advert, lpa, val, media; + int lpa2 = 0; + int speed; + + if (!mii_link_ok(mii)) + return 0; + + val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR); + if ((val & BMSR_ANEGCOMPLETE) == 0) + return 0; + + advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE); + lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA); + media = mii_nway_result(advert & lpa); + + if (mii->supports_gmii) + lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000); + + speed = lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 : + (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 100 : 10); + return speed; +} + +static void tsi108_check_phy(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 mac_cfg2_reg, portctrl_reg; + u32 duplex; + u32 speed; + unsigned long flags; + + /* Do a dummy read, as for some reason the first read + * after a link becomes up returns link down, even if + * it's been a while since the link came up. + */ + + spin_lock_irqsave(&phy_lock, flags); + + if (!data->phy_ok) + goto out; + + tsi108_read_mii(data, MII_BMSR); + + duplex = mii_check_media(&data->mii_if, netif_msg_link(data), data->init_media); + data->init_media = 0; + + if (netif_carrier_ok(dev)) { + + speed = mii_speed(&data->mii_if); + + if ((speed != data->speed) || duplex) { + + mac_cfg2_reg = TSI_READ(TSI108_MAC_CFG2); + portctrl_reg = TSI_READ(TSI108_EC_PORTCTRL); + + mac_cfg2_reg &= ~TSI108_MAC_CFG2_IFACE_MASK; + + if (speed == 1000) { + mac_cfg2_reg |= TSI108_MAC_CFG2_GIG; + portctrl_reg &= ~TSI108_EC_PORTCTRL_NOGIG; + } else { + mac_cfg2_reg |= TSI108_MAC_CFG2_NOGIG; + portctrl_reg |= TSI108_EC_PORTCTRL_NOGIG; + } + + data->speed = speed; + + if (data->mii_if.full_duplex) { + mac_cfg2_reg |= TSI108_MAC_CFG2_FULLDUPLEX; + portctrl_reg &= ~TSI108_EC_PORTCTRL_HALFDUPLEX; + data->duplex = 2; + } else { + mac_cfg2_reg &= ~TSI108_MAC_CFG2_FULLDUPLEX; + portctrl_reg |= TSI108_EC_PORTCTRL_HALFDUPLEX; + data->duplex = 1; + } + + TSI_WRITE(TSI108_MAC_CFG2, mac_cfg2_reg); + TSI_WRITE(TSI108_EC_PORTCTRL, portctrl_reg); + + if (data->link_up == 0) { + /* The manual says it can take 3-4 usecs for the speed change + * to take effect. + */ + udelay(5); + + spin_lock(&data->txlock); + if (is_valid_ether_addr(dev->dev_addr) && data->txfree) + netif_wake_queue(dev); + + data->link_up = 1; + spin_unlock(&data->txlock); + } + } + + } else { + if (data->link_up == 1) { + netif_stop_queue(dev); + data->link_up = 0; + printk(KERN_NOTICE "%s : link is down\n", dev->name); + } + + goto out; + } + + +out: + spin_unlock_irqrestore(&phy_lock, flags); +} + +static inline void +tsi108_stat_carry_one(int carry, int carry_bit, int carry_shift, + unsigned long *upper) +{ + if (carry & carry_bit) + *upper += carry_shift; +} + +static void tsi108_stat_carry(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 carry1, carry2; + + spin_lock_irq(&data->misclock); + + carry1 = TSI_READ(TSI108_STAT_CARRY1); + carry2 = TSI_READ(TSI108_STAT_CARRY2); + + TSI_WRITE(TSI108_STAT_CARRY1, carry1); + TSI_WRITE(TSI108_STAT_CARRY2, carry2); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXBYTES, + TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXPKTS, + TSI108_STAT_RXPKTS_CARRY, + &data->stats.rx_packets); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFCS, + TSI108_STAT_RXFCS_CARRY, &data->rx_fcs); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXMCAST, + TSI108_STAT_RXMCAST_CARRY, + &data->stats.multicast); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXALIGN, + TSI108_STAT_RXALIGN_CARRY, + &data->stats.rx_frame_errors); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXLENGTH, + TSI108_STAT_RXLENGTH_CARRY, + &data->stats.rx_length_errors); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXRUNT, + TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJUMBO, + TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFRAG, + TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJABBER, + TSI108_STAT_RXJABBER_CARRY, &data->rx_long_fcs); + + tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXDROP, + TSI108_STAT_RXDROP_CARRY, + &data->stats.rx_missed_errors); + + tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXBYTES, + TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes); + + tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPKTS, + TSI108_STAT_TXPKTS_CARRY, + &data->stats.tx_packets); + + tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXDEF, + TSI108_STAT_TXEXDEF_CARRY, + &data->stats.tx_aborted_errors); + + tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXCOL, + TSI108_STAT_TXEXCOL_CARRY, &data->tx_coll_abort); + + tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXTCOL, + TSI108_STAT_TXTCOL_CARRY, + &data->stats.collisions); + + tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPAUSE, + TSI108_STAT_TXPAUSEDROP_CARRY, + &data->tx_pause_drop); + + spin_unlock_irq(&data->misclock); +} + +/* Read a stat counter atomically with respect to carries. + * data->misclock must be held. + */ +static inline unsigned long +tsi108_read_stat(struct tsi108_prv_data * data, int reg, int carry_bit, + int carry_shift, unsigned long *upper) +{ + int carryreg; + unsigned long val; + + if (reg < 0xb0) + carryreg = TSI108_STAT_CARRY1; + else + carryreg = TSI108_STAT_CARRY2; + + again: + val = TSI_READ(reg) | *upper; + + /* Check to see if it overflowed, but the interrupt hasn't + * been serviced yet. If so, handle the carry here, and + * try again. + */ + + if (unlikely(TSI_READ(carryreg) & carry_bit)) { + *upper += carry_shift; + TSI_WRITE(carryreg, carry_bit); + goto again; + } + + return val; +} + +static struct net_device_stats *tsi108_get_stats(struct net_device *dev) +{ + unsigned long excol; + + struct tsi108_prv_data *data = netdev_priv(dev); + spin_lock_irq(&data->misclock); + + data->tmpstats.rx_packets = + tsi108_read_stat(data, TSI108_STAT_RXPKTS, + TSI108_STAT_CARRY1_RXPKTS, + TSI108_STAT_RXPKTS_CARRY, &data->stats.rx_packets); + + data->tmpstats.tx_packets = + tsi108_read_stat(data, TSI108_STAT_TXPKTS, + TSI108_STAT_CARRY2_TXPKTS, + TSI108_STAT_TXPKTS_CARRY, &data->stats.tx_packets); + + data->tmpstats.rx_bytes = + tsi108_read_stat(data, TSI108_STAT_RXBYTES, + TSI108_STAT_CARRY1_RXBYTES, + TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes); + + data->tmpstats.tx_bytes = + tsi108_read_stat(data, TSI108_STAT_TXBYTES, + TSI108_STAT_CARRY2_TXBYTES, + TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes); + + data->tmpstats.multicast = + tsi108_read_stat(data, TSI108_STAT_RXMCAST, + TSI108_STAT_CARRY1_RXMCAST, + TSI108_STAT_RXMCAST_CARRY, &data->stats.multicast); + + excol = tsi108_read_stat(data, TSI108_STAT_TXEXCOL, + TSI108_STAT_CARRY2_TXEXCOL, + TSI108_STAT_TXEXCOL_CARRY, + &data->tx_coll_abort); + + data->tmpstats.collisions = + tsi108_read_stat(data, TSI108_STAT_TXTCOL, + TSI108_STAT_CARRY2_TXTCOL, + TSI108_STAT_TXTCOL_CARRY, &data->stats.collisions); + + data->tmpstats.collisions += excol; + + data->tmpstats.rx_length_errors = + tsi108_read_stat(data, TSI108_STAT_RXLENGTH, + TSI108_STAT_CARRY1_RXLENGTH, + TSI108_STAT_RXLENGTH_CARRY, + &data->stats.rx_length_errors); + + data->tmpstats.rx_length_errors += + tsi108_read_stat(data, TSI108_STAT_RXRUNT, + TSI108_STAT_CARRY1_RXRUNT, + TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns); + + data->tmpstats.rx_length_errors += + tsi108_read_stat(data, TSI108_STAT_RXJUMBO, + TSI108_STAT_CARRY1_RXJUMBO, + TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns); + + data->tmpstats.rx_frame_errors = + tsi108_read_stat(data, TSI108_STAT_RXALIGN, + TSI108_STAT_CARRY1_RXALIGN, + TSI108_STAT_RXALIGN_CARRY, + &data->stats.rx_frame_errors); + + data->tmpstats.rx_frame_errors += + tsi108_read_stat(data, TSI108_STAT_RXFCS, + TSI108_STAT_CARRY1_RXFCS, TSI108_STAT_RXFCS_CARRY, + &data->rx_fcs); + + data->tmpstats.rx_frame_errors += + tsi108_read_stat(data, TSI108_STAT_RXFRAG, + TSI108_STAT_CARRY1_RXFRAG, + TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs); + + data->tmpstats.rx_missed_errors = + tsi108_read_stat(data, TSI108_STAT_RXDROP, + TSI108_STAT_CARRY1_RXDROP, + TSI108_STAT_RXDROP_CARRY, + &data->stats.rx_missed_errors); + + /* These three are maintained by software. */ + data->tmpstats.rx_fifo_errors = data->stats.rx_fifo_errors; + data->tmpstats.rx_crc_errors = data->stats.rx_crc_errors; + + data->tmpstats.tx_aborted_errors = + tsi108_read_stat(data, TSI108_STAT_TXEXDEF, + TSI108_STAT_CARRY2_TXEXDEF, + TSI108_STAT_TXEXDEF_CARRY, + &data->stats.tx_aborted_errors); + + data->tmpstats.tx_aborted_errors += + tsi108_read_stat(data, TSI108_STAT_TXPAUSEDROP, + TSI108_STAT_CARRY2_TXPAUSE, + TSI108_STAT_TXPAUSEDROP_CARRY, + &data->tx_pause_drop); + + data->tmpstats.tx_aborted_errors += excol; + + data->tmpstats.tx_errors = data->tmpstats.tx_aborted_errors; + data->tmpstats.rx_errors = data->tmpstats.rx_length_errors + + data->tmpstats.rx_crc_errors + + data->tmpstats.rx_frame_errors + + data->tmpstats.rx_fifo_errors + data->tmpstats.rx_missed_errors; + + spin_unlock_irq(&data->misclock); + return &data->tmpstats; +} + +static void tsi108_restart_rx(struct tsi108_prv_data * data, struct net_device *dev) +{ + TSI_WRITE(TSI108_EC_RXQ_PTRHIGH, + TSI108_EC_RXQ_PTRHIGH_VALID); + + TSI_WRITE(TSI108_EC_RXCTRL, TSI108_EC_RXCTRL_GO + | TSI108_EC_RXCTRL_QUEUE0); +} + +static void tsi108_restart_tx(struct tsi108_prv_data * data) +{ + TSI_WRITE(TSI108_EC_TXQ_PTRHIGH, + TSI108_EC_TXQ_PTRHIGH_VALID); + + TSI_WRITE(TSI108_EC_TXCTRL, TSI108_EC_TXCTRL_IDLEINT | + TSI108_EC_TXCTRL_GO | TSI108_EC_TXCTRL_QUEUE0); +} + +/* txlock must be held by caller, with IRQs disabled, and + * with permission to re-enable them when the lock is dropped. + */ +static void tsi108_complete_tx(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + int tx; + struct sk_buff *skb; + int release = 0; + + while (!data->txfree || data->txhead != data->txtail) { + tx = data->txtail; + + if (data->txring[tx].misc & TSI108_TX_OWN) + break; + + skb = data->txskbs[tx]; + + if (!(data->txring[tx].misc & TSI108_TX_OK)) + printk("%s: bad tx packet, misc %x\n", + dev->name, data->txring[tx].misc); + + data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN; + data->txfree++; + + if (data->txring[tx].misc & TSI108_TX_EOF) { + dev_kfree_skb_any(skb); + release++; + } + } + + if (release) { + if (is_valid_ether_addr(dev->dev_addr) && data->link_up) + netif_wake_queue(dev); + } +} + +static int tsi108_send_packet(struct sk_buff * skb, struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + int frags = skb_shinfo(skb)->nr_frags + 1; + int i; + + if (!data->phy_ok && net_ratelimit()) + printk(KERN_ERR "%s: Transmit while PHY is down!\n", dev->name); + + if (!data->link_up) { + printk(KERN_ERR "%s: Transmit while link is down!\n", + dev->name); + netif_stop_queue(dev); + return NETDEV_TX_BUSY; + } + + if (data->txfree < MAX_SKB_FRAGS + 1) { + netif_stop_queue(dev); + + if (net_ratelimit()) + printk(KERN_ERR "%s: Transmit with full tx ring!\n", + dev->name); + return NETDEV_TX_BUSY; + } + + if (data->txfree - frags < MAX_SKB_FRAGS + 1) { + netif_stop_queue(dev); + } + + spin_lock_irq(&data->txlock); + + for (i = 0; i < frags; i++) { + int misc = 0; + int tx = data->txhead; + + /* This is done to mark every TSI108_TX_INT_FREQ tx buffers with + * the interrupt bit. TX descriptor-complete interrupts are + * enabled when the queue fills up, and masked when there is + * still free space. This way, when saturating the outbound + * link, the tx interrupts are kept to a reasonable level. + * When the queue is not full, reclamation of skbs still occurs + * as new packets are transmitted, or on a queue-empty + * interrupt. + */ + + if ((tx % TSI108_TX_INT_FREQ == 0) && + ((TSI108_TXRING_LEN - data->txfree) >= TSI108_TX_INT_FREQ)) + misc = TSI108_TX_INT; + + data->txskbs[tx] = skb; + + if (i == 0) { + data->txring[tx].buf0 = dma_map_single(NULL, skb->data, + skb->len - skb->data_len, DMA_TO_DEVICE); + data->txring[tx].len = skb->len - skb->data_len; + misc |= TSI108_TX_SOF; + } else { + skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; + + data->txring[tx].buf0 = + dma_map_page(NULL, frag->page, frag->page_offset, + frag->size, DMA_TO_DEVICE); + data->txring[tx].len = frag->size; + } + + if (i == frags - 1) + misc |= TSI108_TX_EOF; + + if (netif_msg_pktdata(data)) { + int i; + printk("%s: Tx Frame contents (%d)\n", dev->name, + skb->len); + for (i = 0; i < skb->len; i++) + printk(" %2.2x", skb->data[i]); + printk(".\n"); + } + data->txring[tx].misc = misc | TSI108_TX_OWN; + + data->txhead = (data->txhead + 1) % TSI108_TXRING_LEN; + data->txfree--; + } + + tsi108_complete_tx(dev); + + /* This must be done after the check for completed tx descriptors, + * so that the tail pointer is correct. + */ + + if (!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_QUEUE0)) + tsi108_restart_tx(data); + + spin_unlock_irq(&data->txlock); + return NETDEV_TX_OK; +} + +static int tsi108_complete_rx(struct net_device *dev, int budget) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + int done = 0; + + while (data->rxfree && done != budget) { + int rx = data->rxtail; + struct sk_buff *skb; + + if (data->rxring[rx].misc & TSI108_RX_OWN) + break; + + skb = data->rxskbs[rx]; + data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN; + data->rxfree--; + done++; + + if (data->rxring[rx].misc & TSI108_RX_BAD) { + spin_lock_irq(&data->misclock); + + if (data->rxring[rx].misc & TSI108_RX_CRC) + data->stats.rx_crc_errors++; + if (data->rxring[rx].misc & TSI108_RX_OVER) + data->stats.rx_fifo_errors++; + + spin_unlock_irq(&data->misclock); + + dev_kfree_skb_any(skb); + continue; + } + if (netif_msg_pktdata(data)) { + int i; + printk("%s: Rx Frame contents (%d)\n", + dev->name, data->rxring[rx].len); + for (i = 0; i < data->rxring[rx].len; i++) + printk(" %2.2x", skb->data[i]); + printk(".\n"); + } + + skb->dev = dev; + skb_put(skb, data->rxring[rx].len); + skb->protocol = eth_type_trans(skb, dev); + netif_receive_skb(skb); + dev->last_rx = jiffies; + } + + return done; +} + +static int tsi108_refill_rx(struct net_device *dev, int budget) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + int done = 0; + + while (data->rxfree != TSI108_RXRING_LEN && done != budget) { + int rx = data->rxhead; + struct sk_buff *skb; + + data->rxskbs[rx] = skb = dev_alloc_skb(TSI108_RXBUF_SIZE + 2); + if (!skb) + break; + + skb_reserve(skb, 2); /* Align the data on a 4-byte boundary. */ + + data->rxring[rx].buf0 = dma_map_single(NULL, skb->data, + TSI108_RX_SKB_SIZE, + DMA_FROM_DEVICE); + + /* Sometimes the hardware sets blen to zero after packet + * reception, even though the manual says that it's only ever + * modified by the driver. + */ + + data->rxring[rx].blen = TSI108_RX_SKB_SIZE; + data->rxring[rx].misc = TSI108_RX_OWN | TSI108_RX_INT; + + data->rxhead = (data->rxhead + 1) % TSI108_RXRING_LEN; + data->rxfree++; + done++; + } + + if (done != 0 && !(TSI_READ(TSI108_EC_RXSTAT) & + TSI108_EC_RXSTAT_QUEUE0)) + tsi108_restart_rx(data, dev); + + return done; +} + +static int tsi108_poll(struct net_device *dev, int *budget) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 estat = TSI_READ(TSI108_EC_RXESTAT); + u32 intstat = TSI_READ(TSI108_EC_INTSTAT); + int total_budget = min(*budget, dev->quota); + int num_received = 0, num_filled = 0, budget_used; + + intstat &= TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH | + TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | TSI108_INT_RXWAIT; + + TSI_WRITE(TSI108_EC_RXESTAT, estat); + TSI_WRITE(TSI108_EC_INTSTAT, intstat); + + if (data->rxpending || (estat & TSI108_EC_RXESTAT_Q0_DESCINT)) + num_received = tsi108_complete_rx(dev, total_budget); + + /* This should normally fill no more slots than the number of + * packets received in tsi108_complete_rx(). The exception + * is when we previously ran out of memory for RX SKBs. In that + * case, it's helpful to obey the budget, not only so that the + * CPU isn't hogged, but so that memory (which may still be low) + * is not hogged by one device. + * + * A work unit is considered to be two SKBs to allow us to catch + * up when the ring has shrunk due to out-of-memory but we're + * still removing the full budget's worth of packets each time. + */ + + if (data->rxfree < TSI108_RXRING_LEN) + num_filled = tsi108_refill_rx(dev, total_budget * 2); + + if (intstat & TSI108_INT_RXERROR) { + u32 err = TSI_READ(TSI108_EC_RXERR); + TSI_WRITE(TSI108_EC_RXERR, err); + + if (err) { + if (net_ratelimit()) + printk(KERN_DEBUG "%s: RX error %x\n", + dev->name, err); + + if (!(TSI_READ(TSI108_EC_RXSTAT) & + TSI108_EC_RXSTAT_QUEUE0)) + tsi108_restart_rx(data, dev); + } + } + + if (intstat & TSI108_INT_RXOVERRUN) { + spin_lock_irq(&data->misclock); + data->stats.rx_fifo_errors++; + spin_unlock_irq(&data->misclock); + } + + budget_used = max(num_received, num_filled / 2); + + *budget -= budget_used; + dev->quota -= budget_used; + + if (budget_used != total_budget) { + data->rxpending = 0; + netif_rx_complete(dev); + + TSI_WRITE(TSI108_EC_INTMASK, + TSI_READ(TSI108_EC_INTMASK) + & ~(TSI108_INT_RXQUEUE0 + | TSI108_INT_RXTHRESH | + TSI108_INT_RXOVERRUN | + TSI108_INT_RXERROR | + TSI108_INT_RXWAIT)); + + /* IRQs are level-triggered, so no need to re-check */ + return 0; + } else { + data->rxpending = 1; + } + + return 1; +} + +static void tsi108_rx_int(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + + /* A race could cause dev to already be scheduled, so it's not an + * error if that happens (and interrupts shouldn't be re-masked, + * because that can cause harmful races, if poll has already + * unmasked them but not cleared LINK_STATE_SCHED). + * + * This can happen if this code races with tsi108_poll(), which masks + * the interrupts after tsi108_irq_one() read the mask, but before + * netif_rx_schedule is called. It could also happen due to calls + * from tsi108_check_rxring(). + */ + + if (netif_rx_schedule_prep(dev)) { + /* Mask, rather than ack, the receive interrupts. The ack + * will happen in tsi108_poll(). + */ + + TSI_WRITE(TSI108_EC_INTMASK, + TSI_READ(TSI108_EC_INTMASK) | + TSI108_INT_RXQUEUE0 + | TSI108_INT_RXTHRESH | + TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | + TSI108_INT_RXWAIT); + __netif_rx_schedule(dev); + } else { + if (!netif_running(dev)) { + /* This can happen if an interrupt occurs while the + * interface is being brought down, as the START + * bit is cleared before the stop function is called. + * + * In this case, the interrupts must be masked, or + * they will continue indefinitely. + * + * There's a race here if the interface is brought down + * and then up in rapid succession, as the device could + * be made running after the above check and before + * the masking below. This will only happen if the IRQ + * thread has a lower priority than the task brining + * up the interface. Fixing this race would likely + * require changes in generic code. + */ + + TSI_WRITE(TSI108_EC_INTMASK, + TSI_READ + (TSI108_EC_INTMASK) | + TSI108_INT_RXQUEUE0 | + TSI108_INT_RXTHRESH | + TSI108_INT_RXOVERRUN | + TSI108_INT_RXERROR | + TSI108_INT_RXWAIT); + } + } +} + +/* If the RX ring has run out of memory, try periodically + * to allocate some more, as otherwise poll would never + * get called (apart from the initial end-of-queue condition). + * + * This is called once per second (by default) from the thread. + */ + +static void tsi108_check_rxring(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + + /* A poll is scheduled, as opposed to caling tsi108_refill_rx + * directly, so as to keep the receive path single-threaded + * (and thus not needing a lock). + */ + + if (netif_running(dev) && data->rxfree < TSI108_RXRING_LEN / 4) + tsi108_rx_int(dev); +} + +static void tsi108_tx_int(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 estat = TSI_READ(TSI108_EC_TXESTAT); + + TSI_WRITE(TSI108_EC_TXESTAT, estat); + TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_TXQUEUE0 | + TSI108_INT_TXIDLE | TSI108_INT_TXERROR); + if (estat & TSI108_EC_TXESTAT_Q0_ERR) { + u32 err = TSI_READ(TSI108_EC_TXERR); + TSI_WRITE(TSI108_EC_TXERR, err); + + if (err && net_ratelimit()) + printk(KERN_ERR "%s: TX error %x\n", dev->name, err); + } + + if (estat & (TSI108_EC_TXESTAT_Q0_DESCINT | TSI108_EC_TXESTAT_Q0_EOQ)) { + spin_lock(&data->txlock); + tsi108_complete_tx(dev); + spin_unlock(&data->txlock); + } +} + + +static irqreturn_t tsi108_irq(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct tsi108_prv_data *data = netdev_priv(dev); + u32 stat = TSI_READ(TSI108_EC_INTSTAT); + + if (!(stat & TSI108_INT_ANY)) + return IRQ_NONE; /* Not our interrupt */ + + stat &= ~TSI_READ(TSI108_EC_INTMASK); + + if (stat & (TSI108_INT_TXQUEUE0 | TSI108_INT_TXIDLE | + TSI108_INT_TXERROR)) + tsi108_tx_int(dev); + if (stat & (TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH | + TSI108_INT_RXWAIT | TSI108_INT_RXOVERRUN | + TSI108_INT_RXERROR)) + tsi108_rx_int(dev); + + if (stat & TSI108_INT_SFN) { + if (net_ratelimit()) + printk(KERN_DEBUG "%s: SFN error\n", dev->name); + TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_SFN); + } + + if (stat & TSI108_INT_STATCARRY) { + tsi108_stat_carry(dev); + TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_STATCARRY); + } + + return IRQ_HANDLED; +} + +static void tsi108_stop_ethernet(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + int i = 1000; + /* Disable all TX and RX queues ... */ + TSI_WRITE(TSI108_EC_TXCTRL, 0); + TSI_WRITE(TSI108_EC_RXCTRL, 0); + + /* ...and wait for them to become idle */ + while(i--) { + if(!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_ACTIVE)) + break; + udelay(10); + } + i = 1000; + while(i--){ + if(!(TSI_READ(TSI108_EC_RXSTAT) & TSI108_EC_RXSTAT_ACTIVE)) + return; + udelay(10); + } + printk(KERN_ERR "%s function time out \n", __FUNCTION__); +} + +static void tsi108_reset_ether(struct tsi108_prv_data * data) +{ + TSI_WRITE(TSI108_MAC_CFG1, TSI108_MAC_CFG1_SOFTRST); + udelay(100); + TSI_WRITE(TSI108_MAC_CFG1, 0); + + TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATRST); + udelay(100); + TSI_WRITE(TSI108_EC_PORTCTRL, + TSI_READ(TSI108_EC_PORTCTRL) & + ~TSI108_EC_PORTCTRL_STATRST); + + TSI_WRITE(TSI108_EC_TXCFG, TSI108_EC_TXCFG_RST); + udelay(100); + TSI_WRITE(TSI108_EC_TXCFG, + TSI_READ(TSI108_EC_TXCFG) & + ~TSI108_EC_TXCFG_RST); + + TSI_WRITE(TSI108_EC_RXCFG, TSI108_EC_RXCFG_RST); + udelay(100); + TSI_WRITE(TSI108_EC_RXCFG, + TSI_READ(TSI108_EC_RXCFG) & + ~TSI108_EC_RXCFG_RST); + + TSI_WRITE(TSI108_MAC_MII_MGMT_CFG, + TSI_READ(TSI108_MAC_MII_MGMT_CFG) | + TSI108_MAC_MII_MGMT_RST); + udelay(100); + TSI_WRITE(TSI108_MAC_MII_MGMT_CFG, + (TSI_READ(TSI108_MAC_MII_MGMT_CFG) & + ~(TSI108_MAC_MII_MGMT_RST | + TSI108_MAC_MII_MGMT_CLK)) | 0x07); +} + +static int tsi108_get_mac(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 word1 = TSI_READ(TSI108_MAC_ADDR1); + u32 word2 = TSI_READ(TSI108_MAC_ADDR2); + + /* Note that the octets are reversed from what the manual says, + * producing an even weirder ordering... + */ + if (word2 == 0 && word1 == 0) { + dev->dev_addr[0] = 0x00; + dev->dev_addr[1] = 0x06; + dev->dev_addr[2] = 0xd2; + dev->dev_addr[3] = 0x00; + dev->dev_addr[4] = 0x00; + if (0x8 == data->phy) + dev->dev_addr[5] = 0x01; + else + dev->dev_addr[5] = 0x02; + + word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24); + + word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) | + (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24); + + TSI_WRITE(TSI108_MAC_ADDR1, word1); + TSI_WRITE(TSI108_MAC_ADDR2, word2); + } else { + dev->dev_addr[0] = (word2 >> 16) & 0xff; + dev->dev_addr[1] = (word2 >> 24) & 0xff; + dev->dev_addr[2] = (word1 >> 0) & 0xff; + dev->dev_addr[3] = (word1 >> 8) & 0xff; + dev->dev_addr[4] = (word1 >> 16) & 0xff; + dev->dev_addr[5] = (word1 >> 24) & 0xff; + } + + if (!is_valid_ether_addr(dev->dev_addr)) { + printk("KERN_ERR: word1: %08x, word2: %08x\n", word1, word2); + return -EINVAL; + } + + return 0; +} + +static int tsi108_set_mac(struct net_device *dev, void *addr) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 word1, word2; + int i; + + if (!is_valid_ether_addr(addr)) + return -EINVAL; + + for (i = 0; i < 6; i++) + /* +2 is for the offset of the HW addr type */ + dev->dev_addr[i] = ((unsigned char *)addr)[i + 2]; + + word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24); + + word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) | + (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24); + + spin_lock_irq(&data->misclock); + TSI_WRITE(TSI108_MAC_ADDR1, word1); + TSI_WRITE(TSI108_MAC_ADDR2, word2); + spin_lock(&data->txlock); + + if (data->txfree && data->link_up) + netif_wake_queue(dev); + + spin_unlock(&data->txlock); + spin_unlock_irq(&data->misclock); + return 0; +} + +/* Protected by dev->xmit_lock. */ +static void tsi108_set_rx_mode(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 rxcfg = TSI_READ(TSI108_EC_RXCFG); + + if (dev->flags & IFF_PROMISC) { + rxcfg &= ~(TSI108_EC_RXCFG_UC_HASH | TSI108_EC_RXCFG_MC_HASH); + rxcfg |= TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE; + goto out; + } + + rxcfg &= ~(TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE); + + if (dev->flags & IFF_ALLMULTI || dev->mc_count) { + int i; + struct dev_mc_list *mc = dev->mc_list; + rxcfg |= TSI108_EC_RXCFG_MFE | TSI108_EC_RXCFG_MC_HASH; + + memset(data->mc_hash, 0, sizeof(data->mc_hash)); + + while (mc) { + u32 hash, crc; + + if (mc->dmi_addrlen == 6) { + crc = ether_crc(6, mc->dmi_addr); + hash = crc >> 23; + + __set_bit(hash, &data->mc_hash[0]); + } else { + printk(KERN_ERR + "%s: got multicast address of length %d " + "instead of 6.\n", dev->name, + mc->dmi_addrlen); + } + + mc = mc->next; + } + + TSI_WRITE(TSI108_EC_HASHADDR, + TSI108_EC_HASHADDR_AUTOINC | + TSI108_EC_HASHADDR_MCAST); + + for (i = 0; i < 16; i++) { + /* The manual says that the hardware may drop + * back-to-back writes to the data register. + */ + udelay(1); + TSI_WRITE(TSI108_EC_HASHDATA, + data->mc_hash[i]); + } + } + + out: + TSI_WRITE(TSI108_EC_RXCFG, rxcfg); +} + +static void tsi108_init_phy(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + u32 i = 0; + u16 phyval = 0; + unsigned long flags; + + spin_lock_irqsave(&phy_lock, flags); + + tsi108_write_mii(data, MII_BMCR, BMCR_RESET); + while (i--){ + if(!(tsi108_read_mii(data, MII_BMCR) & BMCR_RESET)) + break; + udelay(10); + } + if (i == 0) + printk(KERN_ERR "%s function time out \n", __FUNCTION__); + +#if (TSI108_PHY_TYPE == PHY_BCM54XX) /* Broadcom BCM54xx PHY */ + tsi108_write_mii(data, 0x09, 0x0300); + tsi108_write_mii(data, 0x10, 0x1020); + tsi108_write_mii(data, 0x1c, 0x8c00); +#endif + + tsi108_write_mii(data, + MII_BMCR, + BMCR_ANENABLE | BMCR_ANRESTART); + while (tsi108_read_mii(data, MII_BMCR) & BMCR_ANRESTART) + cpu_relax(); + + /* Set G/MII mode and receive clock select in TBI control #2. The + * second port won't work if this isn't done, even though we don't + * use TBI mode. + */ + + tsi108_write_tbi(data, 0x11, 0x30); + + /* FIXME: It seems to take more than 2 back-to-back reads to the + * PHY_STAT register before the link up status bit is set. + */ + + data->link_up = 1; + + while (!((phyval = tsi108_read_mii(data, MII_BMSR)) & + BMSR_LSTATUS)) { + if (i++ > (MII_READ_DELAY / 10)) { + data->link_up = 0; + break; + } + spin_unlock_irqrestore(&phy_lock, flags); + msleep(10); + spin_lock_irqsave(&phy_lock, flags); + } + + printk(KERN_DEBUG "PHY_STAT reg contains %08x\n", phyval); + data->phy_ok = 1; + data->init_media = 1; + spin_unlock_irqrestore(&phy_lock, flags); +} + +static void tsi108_kill_phy(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&phy_lock, flags); + tsi108_write_mii(data, MII_BMCR, BMCR_PDOWN); + data->phy_ok = 0; + spin_unlock_irqrestore(&phy_lock, flags); +} + +static int tsi108_open(struct net_device *dev) +{ + int i; + struct tsi108_prv_data *data = netdev_priv(dev); + unsigned int rxring_size = TSI108_RXRING_LEN * sizeof(rx_desc); + unsigned int txring_size = TSI108_TXRING_LEN * sizeof(tx_desc); + + i = request_irq(data->irq_num, tsi108_irq, 0, dev->name, dev); + if (i != 0) { + printk(KERN_ERR "tsi108_eth%d: Could not allocate IRQ%d.\n", + data->id, data->irq_num); + return i; + } else { + dev->irq = data->irq_num; + printk(KERN_NOTICE + "tsi108_open : Port %d Assigned IRQ %d to %s\n", + data->id, dev->irq, dev->name); + } + + data->rxring = dma_alloc_coherent(NULL, rxring_size, + &data->rxdma, GFP_KERNEL); + + if (!data->rxring) { + printk(KERN_DEBUG + "TSI108_ETH: failed to allocate memory for rxring!\n"); + return -ENOMEM; + } else { + memset(data->rxring, 0, rxring_size); + } + + data->txring = dma_alloc_coherent(NULL, txring_size, + &data->txdma, GFP_KERNEL); + + if (!data->txring) { + printk(KERN_DEBUG + "TSI108_ETH: failed to allocate memory for txring!\n"); + pci_free_consistent(0, rxring_size, data->rxring, data->rxdma); + return -ENOMEM; + } else { + memset(data->txring, 0, txring_size); + } + + for (i = 0; i < TSI108_RXRING_LEN; i++) { + data->rxring[i].next0 = data->rxdma + (i + 1) * sizeof(rx_desc); + data->rxring[i].blen = TSI108_RXBUF_SIZE; + data->rxring[i].vlan = 0; + } + + data->rxring[TSI108_RXRING_LEN - 1].next0 = data->rxdma; + + data->rxtail = 0; + data->rxhead = 0; + + for (i = 0; i < TSI108_RXRING_LEN; i++) { + struct sk_buff *skb = dev_alloc_skb(TSI108_RXBUF_SIZE + NET_IP_ALIGN); + + if (!skb) { + /* Bah. No memory for now, but maybe we'll get + * some more later. + * For now, we'll live with the smaller ring. + */ + printk(KERN_WARNING + "%s: Could only allocate %d receive skb(s).\n", + dev->name, i); + data->rxhead = i; + break; + } + + data->rxskbs[i] = skb; + /* Align the payload on a 4-byte boundary */ + skb_reserve(skb, 2); + data->rxskbs[i] = skb; + data->rxring[i].buf0 = virt_to_phys(data->rxskbs[i]->data); + data->rxring[i].misc = TSI108_RX_OWN | TSI108_RX_INT; + } + + data->rxfree = i; + TSI_WRITE(TSI108_EC_RXQ_PTRLOW, data->rxdma); + + for (i = 0; i < TSI108_TXRING_LEN; i++) { + data->txring[i].next0 = data->txdma + (i + 1) * sizeof(tx_desc); + data->txring[i].misc = 0; + } + + data->txring[TSI108_TXRING_LEN - 1].next0 = data->txdma; + data->txtail = 0; + data->txhead = 0; + data->txfree = TSI108_TXRING_LEN; + TSI_WRITE(TSI108_EC_TXQ_PTRLOW, data->txdma); + tsi108_init_phy(dev); + + setup_timer(&data->timer, tsi108_timed_checker, (unsigned long)dev); + mod_timer(&data->timer, jiffies + 1); + + tsi108_restart_rx(data, dev); + + TSI_WRITE(TSI108_EC_INTSTAT, ~0); + + TSI_WRITE(TSI108_EC_INTMASK, + ~(TSI108_INT_TXQUEUE0 | TSI108_INT_RXERROR | + TSI108_INT_RXTHRESH | TSI108_INT_RXQUEUE0 | + TSI108_INT_RXOVERRUN | TSI108_INT_RXWAIT | + TSI108_INT_SFN | TSI108_INT_STATCARRY)); + + TSI_WRITE(TSI108_MAC_CFG1, + TSI108_MAC_CFG1_RXEN | TSI108_MAC_CFG1_TXEN); + netif_start_queue(dev); + return 0; +} + +static int tsi108_close(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + + netif_stop_queue(dev); + + del_timer_sync(&data->timer); + + tsi108_stop_ethernet(dev); + tsi108_kill_phy(dev); + TSI_WRITE(TSI108_EC_INTMASK, ~0); + TSI_WRITE(TSI108_MAC_CFG1, 0); + + /* Check for any pending TX packets, and drop them. */ + + while (!data->txfree || data->txhead != data->txtail) { + int tx = data->txtail; + struct sk_buff *skb; + skb = data->txskbs[tx]; + data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN; + data->txfree++; + dev_kfree_skb(skb); + } + + synchronize_irq(data->irq_num); + free_irq(data->irq_num, dev); + + /* Discard the RX ring. */ + + while (data->rxfree) { + int rx = data->rxtail; + struct sk_buff *skb; + + skb = data->rxskbs[rx]; + data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN; + data->rxfree--; + dev_kfree_skb(skb); + } + + dma_free_coherent(0, + TSI108_RXRING_LEN * sizeof(rx_desc), + data->rxring, data->rxdma); + dma_free_coherent(0, + TSI108_TXRING_LEN * sizeof(tx_desc), + data->txring, data->txdma); + + return 0; +} + +static void tsi108_init_mac(struct net_device *dev) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + + TSI_WRITE(TSI108_MAC_CFG2, TSI108_MAC_CFG2_DFLT_PREAMBLE | + TSI108_MAC_CFG2_PADCRC); + + TSI_WRITE(TSI108_EC_TXTHRESH, + (192 << TSI108_EC_TXTHRESH_STARTFILL) | + (192 << TSI108_EC_TXTHRESH_STOPFILL)); + + TSI_WRITE(TSI108_STAT_CARRYMASK1, + ~(TSI108_STAT_CARRY1_RXBYTES | + TSI108_STAT_CARRY1_RXPKTS | + TSI108_STAT_CARRY1_RXFCS | + TSI108_STAT_CARRY1_RXMCAST | + TSI108_STAT_CARRY1_RXALIGN | + TSI108_STAT_CARRY1_RXLENGTH | + TSI108_STAT_CARRY1_RXRUNT | + TSI108_STAT_CARRY1_RXJUMBO | + TSI108_STAT_CARRY1_RXFRAG | + TSI108_STAT_CARRY1_RXJABBER | + TSI108_STAT_CARRY1_RXDROP)); + + TSI_WRITE(TSI108_STAT_CARRYMASK2, + ~(TSI108_STAT_CARRY2_TXBYTES | + TSI108_STAT_CARRY2_TXPKTS | + TSI108_STAT_CARRY2_TXEXDEF | + TSI108_STAT_CARRY2_TXEXCOL | + TSI108_STAT_CARRY2_TXTCOL | + TSI108_STAT_CARRY2_TXPAUSE)); + + TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATEN); + TSI_WRITE(TSI108_MAC_CFG1, 0); + + TSI_WRITE(TSI108_EC_RXCFG, + TSI108_EC_RXCFG_SE | TSI108_EC_RXCFG_BFE); + + TSI_WRITE(TSI108_EC_TXQ_CFG, TSI108_EC_TXQ_CFG_DESC_INT | + TSI108_EC_TXQ_CFG_EOQ_OWN_INT | + TSI108_EC_TXQ_CFG_WSWP | (TSI108_PBM_PORT << + TSI108_EC_TXQ_CFG_SFNPORT)); + + TSI_WRITE(TSI108_EC_RXQ_CFG, TSI108_EC_RXQ_CFG_DESC_INT | + TSI108_EC_RXQ_CFG_EOQ_OWN_INT | + TSI108_EC_RXQ_CFG_WSWP | (TSI108_PBM_PORT << + TSI108_EC_RXQ_CFG_SFNPORT)); + + TSI_WRITE(TSI108_EC_TXQ_BUFCFG, + TSI108_EC_TXQ_BUFCFG_BURST256 | + TSI108_EC_TXQ_BUFCFG_BSWP | (TSI108_PBM_PORT << + TSI108_EC_TXQ_BUFCFG_SFNPORT)); + + TSI_WRITE(TSI108_EC_RXQ_BUFCFG, + TSI108_EC_RXQ_BUFCFG_BURST256 | + TSI108_EC_RXQ_BUFCFG_BSWP | (TSI108_PBM_PORT << + TSI108_EC_RXQ_BUFCFG_SFNPORT)); + + TSI_WRITE(TSI108_EC_INTMASK, ~0); +} + +static int tsi108_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct tsi108_prv_data *data = netdev_priv(dev); + return generic_mii_ioctl(&data->mii_if, if_mii(rq), cmd, NULL); +} + +static int +tsi108_init_one(struct platform_device *pdev) +{ + struct net_device *dev = NULL; + struct tsi108_prv_data *data = NULL; + hw_info *einfo; + int err = 0; + + einfo = pdev->dev.platform_data; + + if (NULL == einfo) { + printk(KERN_ERR "tsi-eth %d: Missing additional data!\n", + pdev->id); + return -ENODEV; + } + + /* Create an ethernet device instance */ + + dev = alloc_etherdev(sizeof(struct tsi108_prv_data)); + if (!dev) { + printk("tsi108_eth: Could not allocate a device structure\n"); + return -ENOMEM; + } + + printk("tsi108_eth%d: probe...\n", pdev->id); + data = netdev_priv(dev); + + pr_debug("tsi108_eth%d:regs:phyresgs:phy:irq_num=0x%x:0x%x:0x%x:0x%x\n", + pdev->id, einfo->regs, einfo->phyregs, + einfo->phy, einfo->irq_num); + + data->regs = ioremap(einfo->regs, 0x400); + if (NULL == data->regs) { + err = -ENOMEM; + goto regs_fail; + } + + data->phyregs = ioremap(einfo->phyregs, 0x400); + if (NULL == data->phyregs) { + err = -ENOMEM; + goto regs_fail; + } +/* MII setup */ + data->mii_if.dev = dev; + data->mii_if.mdio_read = tsi108_mdio_read; + data->mii_if.mdio_write = tsi108_mdio_write; + data->mii_if.phy_id = einfo->phy; + data->mii_if.phy_id_mask = 0x1f; + data->mii_if.reg_num_mask = 0x1f; + data->mii_if.supports_gmii = mii_check_gmii_support(&data->mii_if); + + data->phy = einfo->phy; + data->irq_num = einfo->irq_num; + data->id = pdev->id; + dev->open = tsi108_open; + dev->stop = tsi108_close; + dev->hard_start_xmit = tsi108_send_packet; + dev->set_mac_address = tsi108_set_mac; + dev->set_multicast_list = tsi108_set_rx_mode; + dev->get_stats = tsi108_get_stats; + dev->poll = tsi108_poll; + dev->do_ioctl = tsi108_do_ioctl; + dev->weight = 64; /* 64 is more suitable for GigE interface - klai */ + + /* Apparently, the Linux networking code won't use scatter-gather + * if the hardware doesn't do checksums. However, it's faster + * to checksum in place and use SG, as (among other reasons) + * the cache won't be dirtied (which then has to be flushed + * before DMA). The checksumming is done by the driver (via + * a new function skb_csum_dev() in net/core/skbuff.c). + */ + + dev->features = NETIF_F_HIGHDMA; + SET_MODULE_OWNER(dev); + + spin_lock_init(&data->txlock); + spin_lock_init(&data->misclock); + + tsi108_reset_ether(data); + tsi108_kill_phy(dev); + + if ((err = tsi108_get_mac(dev)) != 0) { + printk(KERN_ERR "%s: Invalid MAC address. Please correct.\n", + dev->name); + goto register_fail; + } + + tsi108_init_mac(dev); + err = register_netdev(dev); + if (err) { + printk(KERN_ERR "%s: Cannot register net device, aborting.\n", + dev->name); + goto register_fail; + } + + printk(KERN_INFO "%s: Tsi108 Gigabit Ethernet, MAC: " + "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, + dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], + dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); +#ifdef DEBUG + data->msg_enable = DEBUG; + dump_eth_one(dev); +#endif + + return 0; + +register_fail: + iounmap(data->regs); + iounmap(data->phyregs); + +regs_fail: + free_netdev(dev); + return err; +} + +/* There's no way to either get interrupts from the PHY when + * something changes, or to have the Tsi108 automatically communicate + * with the PHY to reconfigure itself. + * + * Thus, we have to do it using a timer. + */ + +static void tsi108_timed_checker(unsigned long dev_ptr) +{ + struct net_device *dev = (struct net_device *)dev_ptr; + struct tsi108_prv_data *data = netdev_priv(dev); + + tsi108_check_phy(dev); + tsi108_check_rxring(dev); + mod_timer(&data->timer, jiffies + CHECK_PHY_INTERVAL); +} + +static int tsi108_ether_init(void) +{ + int ret; + ret = platform_driver_register (&tsi_eth_driver); + if (ret < 0){ + printk("tsi108_ether_init: error initializing ethernet " + "device\n"); + return ret; + } + return 0; +} + +static int tsi108_ether_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct tsi108_prv_data *priv = netdev_priv(dev); + + unregister_netdev(dev); + tsi108_stop_ethernet(dev); + platform_set_drvdata(pdev, NULL); + iounmap(priv->regs); + iounmap(priv->phyregs); + free_netdev(dev); + + return 0; +} +static void tsi108_ether_exit(void) +{ + platform_driver_unregister(&tsi_eth_driver); +} + +module_init(tsi108_ether_init); +module_exit(tsi108_ether_exit); + +MODULE_AUTHOR("Tundra Semiconductor Corporation"); +MODULE_DESCRIPTION("Tsi108 Gigabit Ethernet driver"); +MODULE_LICENSE("GPL"); |