diff options
Diffstat (limited to 'drivers/net/au1000_eth.c')
| -rw-r--r-- | drivers/net/au1000_eth.c | 1043 |
1 files changed, 511 insertions, 532 deletions
diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c index 79aec32..4274e4a 100644 --- a/drivers/net/au1000_eth.c +++ b/drivers/net/au1000_eth.c @@ -81,24 +81,6 @@ MODULE_AUTHOR(DRV_AUTHOR); MODULE_DESCRIPTION(DRV_DESC); MODULE_LICENSE("GPL"); -// prototypes -static void hard_stop(struct net_device *); -static void enable_rx_tx(struct net_device *dev); -static struct net_device * au1000_probe(int port_num); -static int au1000_init(struct net_device *); -static int au1000_open(struct net_device *); -static int au1000_close(struct net_device *); -static int au1000_tx(struct sk_buff *, struct net_device *); -static int au1000_rx(struct net_device *); -static irqreturn_t au1000_interrupt(int, void *); -static void au1000_tx_timeout(struct net_device *); -static void set_rx_mode(struct net_device *); -static int au1000_ioctl(struct net_device *, struct ifreq *, int); -static int au1000_mdio_read(struct net_device *, int, int); -static void au1000_mdio_write(struct net_device *, int, int, u16); -static void au1000_adjust_link(struct net_device *); -static void enable_mac(struct net_device *, int); - /* * Theory of operation * @@ -188,6 +170,26 @@ struct au1000_private *au_macs[NUM_ETH_INTERFACES]; # error MAC0-associated PHY attached 2nd MACs MII bus not supported yet #endif +static void enable_mac(struct net_device *dev, int force_reset) +{ + unsigned long flags; + struct au1000_private *aup = netdev_priv(dev); + + spin_lock_irqsave(&aup->lock, flags); + + if(force_reset || (!aup->mac_enabled)) { + *aup->enable = MAC_EN_CLOCK_ENABLE; + au_sync_delay(2); + *aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2 + | MAC_EN_CLOCK_ENABLE); + au_sync_delay(2); + + aup->mac_enabled = 1; + } + + spin_unlock_irqrestore(&aup->lock, flags); +} + /* * MII operations */ @@ -281,6 +283,107 @@ static int au1000_mdiobus_reset(struct mii_bus *bus) return 0; } +static void hard_stop(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + + if (au1000_debug > 4) + printk(KERN_INFO "%s: hard stop\n", dev->name); + + aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE); + au_sync_delay(10); +} + +static void enable_rx_tx(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + + if (au1000_debug > 4) + printk(KERN_INFO "%s: enable_rx_tx\n", dev->name); + + aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE); + au_sync_delay(10); +} + +static void +au1000_adjust_link(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + struct phy_device *phydev = aup->phy_dev; + unsigned long flags; + + int status_change = 0; + + BUG_ON(!aup->phy_dev); + + spin_lock_irqsave(&aup->lock, flags); + + if (phydev->link && (aup->old_speed != phydev->speed)) { + // speed changed + + switch(phydev->speed) { + case SPEED_10: + case SPEED_100: + break; + default: + printk(KERN_WARNING + "%s: Speed (%d) is not 10/100 ???\n", + dev->name, phydev->speed); + break; + } + + aup->old_speed = phydev->speed; + + status_change = 1; + } + + if (phydev->link && (aup->old_duplex != phydev->duplex)) { + // duplex mode changed + + /* switching duplex mode requires to disable rx and tx! */ + hard_stop(dev); + + if (DUPLEX_FULL == phydev->duplex) + aup->mac->control = ((aup->mac->control + | MAC_FULL_DUPLEX) + & ~MAC_DISABLE_RX_OWN); + else + aup->mac->control = ((aup->mac->control + & ~MAC_FULL_DUPLEX) + | MAC_DISABLE_RX_OWN); + au_sync_delay(1); + + enable_rx_tx(dev); + aup->old_duplex = phydev->duplex; + + status_change = 1; + } + + if(phydev->link != aup->old_link) { + // link state changed + + if (!phydev->link) { + /* link went down */ + aup->old_speed = 0; + aup->old_duplex = -1; + } + + aup->old_link = phydev->link; + status_change = 1; + } + + spin_unlock_irqrestore(&aup->lock, flags); + + if (status_change) { + if (phydev->link) + printk(KERN_INFO "%s: link up (%d/%s)\n", + dev->name, phydev->speed, + DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); + else + printk(KERN_INFO "%s: link down\n", dev->name); + } +} + static int mii_probe (struct net_device *dev) { struct au1000_private *const aup = netdev_priv(dev); @@ -412,48 +515,6 @@ void ReleaseDB(struct au1000_private *aup, db_dest_t *pDB) aup->pDBfree = pDB; } -static void enable_rx_tx(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk(KERN_INFO "%s: enable_rx_tx\n", dev->name); - - aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE); - au_sync_delay(10); -} - -static void hard_stop(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk(KERN_INFO "%s: hard stop\n", dev->name); - - aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE); - au_sync_delay(10); -} - -static void enable_mac(struct net_device *dev, int force_reset) -{ - unsigned long flags; - struct au1000_private *aup = netdev_priv(dev); - - spin_lock_irqsave(&aup->lock, flags); - - if(force_reset || (!aup->mac_enabled)) { - *aup->enable = MAC_EN_CLOCK_ENABLE; - au_sync_delay(2); - *aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2 - | MAC_EN_CLOCK_ENABLE); - au_sync_delay(2); - - aup->mac_enabled = 1; - } - - spin_unlock_irqrestore(&aup->lock, flags); -} - static void reset_mac_unlocked(struct net_device *dev) { struct au1000_private *const aup = netdev_priv(dev); @@ -542,30 +603,6 @@ static struct { static int num_ifs; /* - * Setup the base address and interrupt of the Au1xxx ethernet macs - * based on cpu type and whether the interface is enabled in sys_pinfunc - * register. The last interface is enabled if SYS_PF_NI2 (bit 4) is 0. - */ -static int __init au1000_init_module(void) -{ - int ni = (int)((au_readl(SYS_PINFUNC) & (u32)(SYS_PF_NI2)) >> 4); - struct net_device *dev; - int i, found_one = 0; - - num_ifs = NUM_ETH_INTERFACES - ni; - - for(i = 0; i < num_ifs; i++) { - dev = au1000_probe(i); - iflist[i].dev = dev; - if (dev) - found_one++; - } - if (!found_one) - return -ENODEV; - return 0; -} - -/* * ethtool operations */ @@ -611,199 +648,6 @@ static const struct ethtool_ops au1000_ethtool_ops = { .get_link = ethtool_op_get_link, }; -static struct net_device * au1000_probe(int port_num) -{ - static unsigned version_printed = 0; - struct au1000_private *aup = NULL; - struct net_device *dev = NULL; - db_dest_t *pDB, *pDBfree; - char ethaddr[6]; - int irq, i, err; - u32 base, macen; - - if (port_num >= NUM_ETH_INTERFACES) - return NULL; - - base = CPHYSADDR(iflist[port_num].base_addr ); - macen = CPHYSADDR(iflist[port_num].macen_addr); - irq = iflist[port_num].irq; - - if (!request_mem_region( base, MAC_IOSIZE, "Au1x00 ENET") || - !request_mem_region(macen, 4, "Au1x00 ENET")) - return NULL; - - if (version_printed++ == 0) - printk("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR); - - dev = alloc_etherdev(sizeof(struct au1000_private)); - if (!dev) { - printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME); - return NULL; - } - - if ((err = register_netdev(dev)) != 0) { - printk(KERN_ERR "%s: Cannot register net device, error %d\n", - DRV_NAME, err); - free_netdev(dev); - return NULL; - } - - printk("%s: Au1xx0 Ethernet found at 0x%x, irq %d\n", - dev->name, base, irq); - - aup = netdev_priv(dev); - - spin_lock_init(&aup->lock); - - /* Allocate the data buffers */ - /* Snooping works fine with eth on all au1xxx */ - aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE * - (NUM_TX_BUFFS + NUM_RX_BUFFS), - &aup->dma_addr, 0); - if (!aup->vaddr) { - free_netdev(dev); - release_mem_region( base, MAC_IOSIZE); - release_mem_region(macen, 4); - return NULL; - } - - /* aup->mac is the base address of the MAC's registers */ - aup->mac = (volatile mac_reg_t *)iflist[port_num].base_addr; - - /* Setup some variables for quick register address access */ - aup->enable = (volatile u32 *)iflist[port_num].macen_addr; - aup->mac_id = port_num; - au_macs[port_num] = aup; - - if (port_num == 0) { - if (prom_get_ethernet_addr(ethaddr) == 0) - memcpy(au1000_mac_addr, ethaddr, sizeof(au1000_mac_addr)); - else { - printk(KERN_INFO "%s: No MAC address found\n", - dev->name); - /* Use the hard coded MAC addresses */ - } - - setup_hw_rings(aup, MAC0_RX_DMA_ADDR, MAC0_TX_DMA_ADDR); - } else if (port_num == 1) - setup_hw_rings(aup, MAC1_RX_DMA_ADDR, MAC1_TX_DMA_ADDR); - - /* - * Assign to the Ethernet ports two consecutive MAC addresses - * to match those that are printed on their stickers - */ - memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr)); - dev->dev_addr[5] += port_num; - - *aup->enable = 0; - aup->mac_enabled = 0; - - aup->mii_bus = mdiobus_alloc(); - if (aup->mii_bus == NULL) - goto err_out; - - aup->mii_bus->priv = dev; - aup->mii_bus->read = au1000_mdiobus_read; - aup->mii_bus->write = au1000_mdiobus_write; - aup->mii_bus->reset = au1000_mdiobus_reset; - aup->mii_bus->name = "au1000_eth_mii"; - snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id); - aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); - for(i = 0; i < PHY_MAX_ADDR; ++i) - aup->mii_bus->irq[i] = PHY_POLL; - - /* if known, set corresponding PHY IRQs */ -#if defined(AU1XXX_PHY_STATIC_CONFIG) -# if defined(AU1XXX_PHY0_IRQ) - if (AU1XXX_PHY0_BUSID == aup->mac_id) - aup->mii_bus->irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ; -# endif -# if defined(AU1XXX_PHY1_IRQ) - if (AU1XXX_PHY1_BUSID == aup->mac_id) - aup->mii_bus->irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ; -# endif -#endif - mdiobus_register(aup->mii_bus); - - if (mii_probe(dev) != 0) { - goto err_out; - } - - pDBfree = NULL; - /* setup the data buffer descriptors and attach a buffer to each one */ - pDB = aup->db; - for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) { - pDB->pnext = pDBfree; - pDBfree = pDB; - pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i); - pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr); - pDB++; - } - aup->pDBfree = pDBfree; - - for (i = 0; i < NUM_RX_DMA; i++) { - pDB = GetFreeDB(aup); - if (!pDB) { - goto err_out; - } - aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; - aup->rx_db_inuse[i] = pDB; - } - for (i = 0; i < NUM_TX_DMA; i++) { - pDB = GetFreeDB(aup); - if (!pDB) { - goto err_out; - } - aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; - aup->tx_dma_ring[i]->len = 0; - aup->tx_db_inuse[i] = pDB; - } - - dev->base_addr = base; - dev->irq = irq; - dev->open = au1000_open; - dev->hard_start_xmit = au1000_tx; - dev->stop = au1000_close; - dev->set_multicast_list = &set_rx_mode; - dev->do_ioctl = &au1000_ioctl; - SET_ETHTOOL_OPS(dev, &au1000_ethtool_ops); - dev->tx_timeout = au1000_tx_timeout; - dev->watchdog_timeo = ETH_TX_TIMEOUT; - - /* - * The boot code uses the ethernet controller, so reset it to start - * fresh. au1000_init() expects that the device is in reset state. - */ - reset_mac(dev); - - return dev; - -err_out: - if (aup->mii_bus != NULL) { - mdiobus_unregister(aup->mii_bus); - mdiobus_free(aup->mii_bus); - } - - /* here we should have a valid dev plus aup-> register addresses - * so we can reset the mac properly.*/ - reset_mac(dev); - - for (i = 0; i < NUM_RX_DMA; i++) { - if (aup->rx_db_inuse[i]) - ReleaseDB(aup, aup->rx_db_inuse[i]); - } - for (i = 0; i < NUM_TX_DMA; i++) { - if (aup->tx_db_inuse[i]) - ReleaseDB(aup, aup->tx_db_inuse[i]); - } - dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), - (void *)aup->vaddr, aup->dma_addr); - unregister_netdev(dev); - free_netdev(dev); - release_mem_region( base, MAC_IOSIZE); - release_mem_region(macen, 4); - return NULL; -} /* * Initialize the interface. @@ -864,83 +708,170 @@ static int au1000_init(struct net_device *dev) return 0; } -static void -au1000_adjust_link(struct net_device *dev) +static inline void update_rx_stats(struct net_device *dev, u32 status) { struct au1000_private *aup = netdev_priv(dev); - struct phy_device *phydev = aup->phy_dev; - unsigned long flags; + struct net_device_stats *ps = &dev->stats; - int status_change = 0; + ps->rx_packets++; + if (status & RX_MCAST_FRAME) + ps->multicast++; - BUG_ON(!aup->phy_dev); + if (status & RX_ERROR) { + ps->rx_errors++; + if (status & RX_MISSED_FRAME) + ps->rx_missed_errors++; + if (status & (RX_OVERLEN | RX_OVERLEN | RX_LEN_ERROR)) + ps->rx_length_errors++; + if (status & RX_CRC_ERROR) + ps->rx_crc_errors++; + if (status & RX_COLL) + ps->collisions++; + } + else + ps->rx_bytes += status & RX_FRAME_LEN_MASK; - spin_lock_irqsave(&aup->lock, flags); +} - if (phydev->link && (aup->old_speed != phydev->speed)) { - // speed changed +/* + * Au1000 receive routine. + */ +static int au1000_rx(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + struct sk_buff *skb; + volatile rx_dma_t *prxd; + u32 buff_stat, status; + db_dest_t *pDB; + u32 frmlen; - switch(phydev->speed) { - case SPEED_10: - case SPEED_100: - break; - default: - printk(KERN_WARNING - "%s: Speed (%d) is not 10/100 ???\n", - dev->name, phydev->speed); - break; - } + if (au1000_debug > 5) + printk("%s: au1000_rx head %d\n", dev->name, aup->rx_head); - aup->old_speed = phydev->speed; + prxd = aup->rx_dma_ring[aup->rx_head]; + buff_stat = prxd->buff_stat; + while (buff_stat & RX_T_DONE) { + status = prxd->status; + pDB = aup->rx_db_inuse[aup->rx_head]; + update_rx_stats(dev, status); + if (!(status & RX_ERROR)) { - status_change = 1; + /* good frame */ + frmlen = (status & RX_FRAME_LEN_MASK); + frmlen -= 4; /* Remove FCS */ + skb = dev_alloc_skb(frmlen + 2); + if (skb == NULL) { + printk(KERN_ERR + "%s: Memory squeeze, dropping packet.\n", + dev->name); + dev->stats.rx_dropped++; + continue; + } + skb_reserve(skb, 2); /* 16 byte IP header align */ + skb_copy_to_linear_data(skb, + (unsigned char *)pDB->vaddr, frmlen); + skb_put(skb, frmlen); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); /* pass the packet to upper layers */ + } + else { + if (au1000_debug > 4) { + if (status & RX_MISSED_FRAME) + printk("rx miss\n"); + if (status & RX_WDOG_TIMER) + printk("rx wdog\n"); + if (status & RX_RUNT) + printk("rx runt\n"); + if (status & RX_OVERLEN) + printk("rx overlen\n"); + if (status & RX_COLL) + printk("rx coll\n"); + if (status & RX_MII_ERROR) + printk("rx mii error\n"); + if (status & RX_CRC_ERROR) + printk("rx crc error\n"); + if (status & RX_LEN_ERROR) + printk("rx len error\n"); + if (status & RX_U_CNTRL_FRAME) + printk("rx u control frame\n"); + if (status & RX_MISSED_FRAME) + printk("rx miss\n"); + } + } + prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE); + aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1); + au_sync(); + + /* next descriptor */ + prxd = aup->rx_dma_ring[aup->rx_head]; + buff_stat = prxd->buff_stat; } + return 0; +} - if (phydev->link && (aup->old_duplex != phydev->duplex)) { - // duplex mode changed +static void update_tx_stats(struct net_device *dev, u32 status) +{ + struct au1000_private *aup = netdev_priv(dev); + struct net_device_stats *ps = &dev->stats; - /* switching duplex mode requires to disable rx and tx! */ - hard_stop(dev); + if (status & TX_FRAME_ABORTED) { + if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) { + if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) { + /* any other tx errors are only valid + * in half duplex mode */ + ps->tx_errors++; + ps->tx_aborted_errors++; + } + } + else { + ps->tx_errors++; + ps->tx_aborted_errors++; + if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER)) + ps->tx_carrier_errors++; + } + } +} - if (DUPLEX_FULL == phydev->duplex) - aup->mac->control = ((aup->mac->control - | MAC_FULL_DUPLEX) - & ~MAC_DISABLE_RX_OWN); - else - aup->mac->control = ((aup->mac->control - & ~MAC_FULL_DUPLEX) - | MAC_DISABLE_RX_OWN); - au_sync_delay(1); +/* + * Called from the interrupt service routine to acknowledge + * the TX DONE bits. This is a must if the irq is setup as + * edge triggered. + */ +static void au1000_tx_ack(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + volatile tx_dma_t *ptxd; - enable_rx_tx(dev); - aup->old_duplex = phydev->duplex; + ptxd = aup->tx_dma_ring[aup->tx_tail]; - status_change = 1; - } + while (ptxd->buff_stat & TX_T_DONE) { + update_tx_stats(dev, ptxd->status); + ptxd->buff_stat &= ~TX_T_DONE; + ptxd->len = 0; + au_sync(); - if(phydev->link != aup->old_link) { - // link state changed + aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1); + ptxd = aup->tx_dma_ring[aup->tx_tail]; - if (!phydev->link) { - /* link went down */ - aup->old_speed = 0; - aup->old_duplex = -1; + if (aup->tx_full) { + aup->tx_full = 0; + netif_wake_queue(dev); } - - aup->old_link = phydev->link; - status_change = 1; } +} - spin_unlock_irqrestore(&aup->lock, flags); +/* + * Au1000 interrupt service routine. + */ +static irqreturn_t au1000_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; - if (status_change) { - if (phydev->link) - printk(KERN_INFO "%s: link up (%d/%s)\n", - dev->name, phydev->speed, - DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); - else - printk(KERN_INFO "%s: link down\n", dev->name); - } + /* Handle RX interrupts first to minimize chance of overrun */ + + au1000_rx(dev); + au1000_tx_ack(dev); + return IRQ_RETVAL(1); } static int au1000_open(struct net_device *dev) @@ -1003,88 +934,6 @@ static int au1000_close(struct net_device *dev) return 0; } -static void __exit au1000_cleanup_module(void) -{ - int i, j; - struct net_device *dev; - struct au1000_private *aup; - - for (i = 0; i < num_ifs; i++) { - dev = iflist[i].dev; - if (dev) { - aup = netdev_priv(dev); - unregister_netdev(dev); - mdiobus_unregister(aup->mii_bus); - mdiobus_free(aup->mii_bus); - for (j = 0; j < NUM_RX_DMA; j++) - if (aup->rx_db_inuse[j]) - ReleaseDB(aup, aup->rx_db_inuse[j]); - for (j = 0; j < NUM_TX_DMA; j++) - if (aup->tx_db_inuse[j]) - ReleaseDB(aup, aup->tx_db_inuse[j]); - dma_free_noncoherent(NULL, MAX_BUF_SIZE * - (NUM_TX_BUFFS + NUM_RX_BUFFS), - (void *)aup->vaddr, aup->dma_addr); - release_mem_region(dev->base_addr, MAC_IOSIZE); - release_mem_region(CPHYSADDR(iflist[i].macen_addr), 4); - free_netdev(dev); - } - } -} - -static void update_tx_stats(struct net_device *dev, u32 status) -{ - struct au1000_private *aup = netdev_priv(dev); - struct net_device_stats *ps = &dev->stats; - - if (status & TX_FRAME_ABORTED) { - if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) { - if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) { - /* any other tx errors are only valid - * in half duplex mode */ - ps->tx_errors++; - ps->tx_aborted_errors++; - } - } - else { - ps->tx_errors++; - ps->tx_aborted_errors++; - if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER)) - ps->tx_carrier_errors++; - } - } -} - - -/* - * Called from the interrupt service routine to acknowledge - * the TX DONE bits. This is a must if the irq is setup as - * edge triggered. - */ -static void au1000_tx_ack(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - volatile tx_dma_t *ptxd; - - ptxd = aup->tx_dma_ring[aup->tx_tail]; - - while (ptxd->buff_stat & TX_T_DONE) { - update_tx_stats(dev, ptxd->status); - ptxd->buff_stat &= ~TX_T_DONE; - ptxd->len = 0; - au_sync(); - - aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1); - ptxd = aup->tx_dma_ring[aup->tx_tail]; - - if (aup->tx_full) { - aup->tx_full = 0; - netif_wake_queue(dev); - } - } -} - - /* * Au1000 transmit routine. */ @@ -1142,123 +991,6 @@ static int au1000_tx(struct sk_buff *skb, struct net_device *dev) return 0; } -static inline void update_rx_stats(struct net_device *dev, u32 status) -{ - struct au1000_private *aup = netdev_priv(dev); - struct net_device_stats *ps = &dev->stats; - - ps->rx_packets++; - if (status & RX_MCAST_FRAME) - ps->multicast++; - - if (status & RX_ERROR) { - ps->rx_errors++; - if (status & RX_MISSED_FRAME) - ps->rx_missed_errors++; - if (status & (RX_OVERLEN | RX_OVERLEN | RX_LEN_ERROR)) - ps->rx_length_errors++; - if (status & RX_CRC_ERROR) - ps->rx_crc_errors++; - if (status & RX_COLL) - ps->collisions++; - } - else - ps->rx_bytes += status & RX_FRAME_LEN_MASK; - -} - -/* - * Au1000 receive routine. - */ -static int au1000_rx(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - struct sk_buff *skb; - volatile rx_dma_t *prxd; - u32 buff_stat, status; - db_dest_t *pDB; - u32 frmlen; - - if (au1000_debug > 5) - printk("%s: au1000_rx head %d\n", dev->name, aup->rx_head); - - prxd = aup->rx_dma_ring[aup->rx_head]; - buff_stat = prxd->buff_stat; - while (buff_stat & RX_T_DONE) { - status = prxd->status; - pDB = aup->rx_db_inuse[aup->rx_head]; - update_rx_stats(dev, status); - if (!(status & RX_ERROR)) { - - /* good frame */ - frmlen = (status & RX_FRAME_LEN_MASK); - frmlen -= 4; /* Remove FCS */ - skb = dev_alloc_skb(frmlen + 2); - if (skb == NULL) { - printk(KERN_ERR - "%s: Memory squeeze, dropping packet.\n", - dev->name); - dev->stats.rx_dropped++; - continue; - } - skb_reserve(skb, 2); /* 16 byte IP header align */ - skb_copy_to_linear_data(skb, - (unsigned char *)pDB->vaddr, frmlen); - skb_put(skb, frmlen); - skb->protocol = eth_type_trans(skb, dev); - netif_rx(skb); /* pass the packet to upper layers */ - } - else { - if (au1000_debug > 4) { - if (status & RX_MISSED_FRAME) - printk("rx miss\n"); - if (status & RX_WDOG_TIMER) - printk("rx wdog\n"); - if (status & RX_RUNT) - printk("rx runt\n"); - if (status & RX_OVERLEN) - printk("rx overlen\n"); - if (status & RX_COLL) - printk("rx coll\n"); - if (status & RX_MII_ERROR) - printk("rx mii error\n"); - if (status & RX_CRC_ERROR) - printk("rx crc error\n"); - if (status & RX_LEN_ERROR) - printk("rx len error\n"); - if (status & RX_U_CNTRL_FRAME) - printk("rx u control frame\n"); - if (status & RX_MISSED_FRAME) - printk("rx miss\n"); - } - } - prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE); - aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1); - au_sync(); - - /* next descriptor */ - prxd = aup->rx_dma_ring[aup->rx_head]; - buff_stat = prxd->buff_stat; - } - return 0; -} - - -/* - * Au1000 interrupt service routine. - */ -static irqreturn_t au1000_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - - /* Handle RX interrupts first to minimize chance of overrun */ - - au1000_rx(dev); - au1000_tx_ack(dev); - return IRQ_RETVAL(1); -} - - /* * The Tx ring has been full longer than the watchdog timeout * value. The transmitter must be hung? @@ -1315,5 +1047,252 @@ static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) return phy_mii_ioctl(aup->phy_dev, if_mii(rq), cmd); } +static struct net_device * au1000_probe(int port_num) +{ + static unsigned version_printed = 0; + struct au1000_private *aup = NULL; + struct net_device *dev = NULL; + db_dest_t *pDB, *pDBfree; + char ethaddr[6]; + int irq, i, err; + u32 base, macen; + + if (port_num >= NUM_ETH_INTERFACES) + return NULL; + + base = CPHYSADDR(iflist[port_num].base_addr ); + macen = CPHYSADDR(iflist[port_num].macen_addr); + irq = iflist[port_num].irq; + + if (!request_mem_region( base, MAC_IOSIZE, "Au1x00 ENET") || + !request_mem_region(macen, 4, "Au1x00 ENET")) + return NULL; + + if (version_printed++ == 0) + printk("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR); + + dev = alloc_etherdev(sizeof(struct au1000_private)); + if (!dev) { + printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME); + return NULL; + } + + if ((err = register_netdev(dev)) != 0) { + printk(KERN_ERR "%s: Cannot register net device, error %d\n", + DRV_NAME, err); + free_netdev(dev); + return NULL; + } + + printk("%s: Au1xx0 Ethernet found at 0x%x, irq %d\n", + dev->name, base, irq); + + aup = netdev_priv(dev); + + spin_lock_init(&aup->lock); + + /* Allocate the data buffers */ + /* Snooping works fine with eth on all au1xxx */ + aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE * + (NUM_TX_BUFFS + NUM_RX_BUFFS), + &aup->dma_addr, 0); + if (!aup->vaddr) { + free_netdev(dev); + release_mem_region( base, MAC_IOSIZE); + release_mem_region(macen, 4); + return NULL; + } + + /* aup->mac is the base address of the MAC's registers */ + aup->mac = (volatile mac_reg_t *)iflist[port_num].base_addr; + + /* Setup some variables for quick register address access */ + aup->enable = (volatile u32 *)iflist[port_num].macen_addr; + aup->mac_id = port_num; + au_macs[port_num] = aup; + + if (port_num == 0) { + if (prom_get_ethernet_addr(ethaddr) == 0) + memcpy(au1000_mac_addr, ethaddr, sizeof(au1000_mac_addr)); + else { + printk(KERN_INFO "%s: No MAC address found\n", + dev->name); + /* Use the hard coded MAC addresses */ + } + + setup_hw_rings(aup, MAC0_RX_DMA_ADDR, MAC0_TX_DMA_ADDR); + } else if (port_num == 1) + setup_hw_rings(aup, MAC1_RX_DMA_ADDR, MAC1_TX_DMA_ADDR); + + /* + * Assign to the Ethernet ports two consecutive MAC addresses + * to match those that are printed on their stickers + */ + memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr)); + dev->dev_addr[5] += port_num; + + *aup->enable = 0; + aup->mac_enabled = 0; + + aup->mii_bus = mdiobus_alloc(); + if (aup->mii_bus == NULL) + goto err_out; + + aup->mii_bus->priv = dev; + aup->mii_bus->read = au1000_mdiobus_read; + aup->mii_bus->write = au1000_mdiobus_write; + aup->mii_bus->reset = au1000_mdiobus_reset; + aup->mii_bus->name = "au1000_eth_mii"; + snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id); + aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); + for(i = 0; i < PHY_MAX_ADDR; ++i) + aup->mii_bus->irq[i] = PHY_POLL; + + /* if known, set corresponding PHY IRQs */ +#if defined(AU1XXX_PHY_STATIC_CONFIG) +# if defined(AU1XXX_PHY0_IRQ) + if (AU1XXX_PHY0_BUSID == aup->mac_id) + aup->mii_bus->irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ; +# endif +# if defined(AU1XXX_PHY1_IRQ) + if (AU1XXX_PHY1_BUSID == aup->mac_id) + aup->mii_bus->irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ; +# endif +#endif + mdiobus_register(aup->mii_bus); + + if (mii_probe(dev) != 0) { + goto err_out; + } + + pDBfree = NULL; + /* setup the data buffer descriptors and attach a buffer to each one */ + pDB = aup->db; + for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) { + pDB->pnext = pDBfree; + pDBfree = pDB; + pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i); + pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr); + pDB++; + } + aup->pDBfree = pDBfree; + + for (i = 0; i < NUM_RX_DMA; i++) { + pDB = GetFreeDB(aup); + if (!pDB) { + goto err_out; + } + aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; + aup->rx_db_inuse[i] = pDB; + } + for (i = 0; i < NUM_TX_DMA; i++) { + pDB = GetFreeDB(aup); + if (!pDB) { + goto err_out; + } + aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; + aup->tx_dma_ring[i]->len = 0; + aup->tx_db_inuse[i] = pDB; + } + + dev->base_addr = base; + dev->irq = irq; + dev->open = au1000_open; + dev->hard_start_xmit = au1000_tx; + dev->stop = au1000_close; + dev->set_multicast_list = &set_rx_mode; + dev->do_ioctl = &au1000_ioctl; + SET_ETHTOOL_OPS(dev, &au1000_ethtool_ops); + dev->tx_timeout = au1000_tx_timeout; + dev->watchdog_timeo = ETH_TX_TIMEOUT; + + /* + * The boot code uses the ethernet controller, so reset it to start + * fresh. au1000_init() expects that the device is in reset state. + */ + reset_mac(dev); + + return dev; + +err_out: + if (aup->mii_bus != NULL) { + mdiobus_unregister(aup->mii_bus); + mdiobus_free(aup->mii_bus); + } + + /* here we should have a valid dev plus aup-> register addresses + * so we can reset the mac properly.*/ + reset_mac(dev); + + for (i = 0; i < NUM_RX_DMA; i++) { + if (aup->rx_db_inuse[i]) + ReleaseDB(aup, aup->rx_db_inuse[i]); + } + for (i = 0; i < NUM_TX_DMA; i++) { + if (aup->tx_db_inuse[i]) + ReleaseDB(aup, aup->tx_db_inuse[i]); + } + dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), + (void *)aup->vaddr, aup->dma_addr); + unregister_netdev(dev); + free_netdev(dev); + release_mem_region( base, MAC_IOSIZE); + release_mem_region(macen, 4); + return NULL; +} + +/* + * Setup the base address and interrupt of the Au1xxx ethernet macs + * based on cpu type and whether the interface is enabled in sys_pinfunc + * register. The last interface is enabled if SYS_PF_NI2 (bit 4) is 0. + */ +static int __init au1000_init_module(void) +{ + int ni = (int)((au_readl(SYS_PINFUNC) & (u32)(SYS_PF_NI2)) >> 4); + struct net_device *dev; + int i, found_one = 0; + + num_ifs = NUM_ETH_INTERFACES - ni; + + for(i = 0; i < num_ifs; i++) { + dev = au1000_probe(i); + iflist[i].dev = dev; + if (dev) + found_one++; + } + if (!found_one) + return -ENODEV; + return 0; +} + +static void __exit au1000_cleanup_module(void) +{ + int i, j; + struct net_device *dev; + struct au1000_private *aup; + + for (i = 0; i < num_ifs; i++) { + dev = iflist[i].dev; + if (dev) { + aup = netdev_priv(dev); + unregister_netdev(dev); + mdiobus_unregister(aup->mii_bus); + mdiobus_free(aup->mii_bus); + for (j = 0; j < NUM_RX_DMA; j++) + if (aup->rx_db_inuse[j]) + ReleaseDB(aup, aup->rx_db_inuse[j]); + for (j = 0; j < NUM_TX_DMA; j++) + if (aup->tx_db_inuse[j]) + ReleaseDB(aup, aup->tx_db_inuse[j]); + dma_free_noncoherent(NULL, MAX_BUF_SIZE * + (NUM_TX_BUFFS + NUM_RX_BUFFS), + (void *)aup->vaddr, aup->dma_addr); + release_mem_region(dev->base_addr, MAC_IOSIZE); + release_mem_region(CPHYSADDR(iflist[i].macen_addr), 4); + free_netdev(dev); + } + } +} + module_init(au1000_init_module); module_exit(au1000_cleanup_module); |
