/* * Atmel MACB Ethernet Controller driver * * Copyright (C) 2004-2006 Atmel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "macb.h" #define to_net_dev(class) container_of(class, struct net_device, class_dev) #define RX_BUFFER_SIZE 128 #define RX_RING_SIZE 512 #define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE) /* Make the IP header word-aligned (the ethernet header is 14 bytes) */ #define RX_OFFSET 2 #define TX_RING_SIZE 128 #define DEF_TX_RING_PENDING (TX_RING_SIZE - 1) #define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE) #define TX_RING_GAP(bp) \ (TX_RING_SIZE - (bp)->tx_pending) #define TX_BUFFS_AVAIL(bp) \ (((bp)->tx_tail <= (bp)->tx_head) ? \ (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \ (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp)) #define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1)) #define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1)) /* minimum number of free TX descriptors before waking up TX process */ #define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4) #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \ | MACB_BIT(ISR_ROVR)) static void __macb_set_hwaddr(struct macb *bp) { u32 bottom; u16 top; bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr)); macb_writel(bp, SA1B, bottom); top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4))); macb_writel(bp, SA1T, top); } static void __init macb_get_hwaddr(struct macb *bp) { u32 bottom; u16 top; u8 addr[6]; bottom = macb_readl(bp, SA1B); top = macb_readl(bp, SA1T); addr[0] = bottom & 0xff; addr[1] = (bottom >> 8) & 0xff; addr[2] = (bottom >> 16) & 0xff; addr[3] = (bottom >> 24) & 0xff; addr[4] = top & 0xff; addr[5] = (top >> 8) & 0xff; if (is_valid_ether_addr(addr)) memcpy(bp->dev->dev_addr, addr, sizeof(addr)); } static void macb_enable_mdio(struct macb *bp) { unsigned long flags; u32 reg; spin_lock_irqsave(&bp->lock, flags); reg = macb_readl(bp, NCR); reg |= MACB_BIT(MPE); macb_writel(bp, NCR, reg); macb_writel(bp, IER, MACB_BIT(MFD)); spin_unlock_irqrestore(&bp->lock, flags); } static void macb_disable_mdio(struct macb *bp) { unsigned long flags; u32 reg; spin_lock_irqsave(&bp->lock, flags); reg = macb_readl(bp, NCR); reg &= ~MACB_BIT(MPE); macb_writel(bp, NCR, reg); macb_writel(bp, IDR, MACB_BIT(MFD)); spin_unlock_irqrestore(&bp->lock, flags); } static int macb_mdio_read(struct net_device *dev, int phy_id, int location) { struct macb *bp = netdev_priv(dev); int value; mutex_lock(&bp->mdio_mutex); macb_enable_mdio(bp); macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | MACB_BF(RW, MACB_MAN_READ) | MACB_BF(PHYA, phy_id) | MACB_BF(REGA, location) | MACB_BF(CODE, MACB_MAN_CODE))); wait_for_completion(&bp->mdio_complete); value = MACB_BFEXT(DATA, macb_readl(bp, MAN)); macb_disable_mdio(bp); mutex_unlock(&bp->mdio_mutex); return value; } static void macb_mdio_write(struct net_device *dev, int phy_id, int location, int val) { struct macb *bp = netdev_priv(dev); dev_dbg(&bp->pdev->dev, "mdio_write %02x:%02x <- %04x\n", phy_id, location, val); mutex_lock(&bp->mdio_mutex); macb_enable_mdio(bp); macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | MACB_BF(RW, MACB_MAN_WRITE) | MACB_BF(PHYA, phy_id) | MACB_BF(REGA, location) | MACB_BF(CODE, MACB_MAN_CODE) | MACB_BF(DATA, val))); wait_for_completion(&bp->mdio_complete); macb_disable_mdio(bp); mutex_unlock(&bp->mdio_mutex); } static int macb_phy_probe(struct macb *bp) { int phy_address; u16 phyid1, phyid2; for (phy_address = 0; phy_address < 32; phy_address++) { phyid1 = macb_mdio_read(bp->dev, phy_address, MII_PHYSID1); phyid2 = macb_mdio_read(bp->dev, phy_address, MII_PHYSID2); if (phyid1 != 0xffff && phyid1 != 0x0000 && phyid2 != 0xffff && phyid2 != 0x0000) break; } if (phy_address == 32) return -ENODEV; dev_info(&bp->pdev->dev, "detected PHY at address %d (ID %04x:%04x)\n", phy_address, phyid1, phyid2); bp->mii.phy_id = phy_address; return 0; } static void macb_set_media(struct macb *bp, int media) { u32 reg; spin_lock_irq(&bp->lock); reg = macb_readl(bp, NCFGR); reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); if (media & (ADVERTISE_100HALF | ADVERTISE_100FULL)) reg |= MACB_BIT(SPD); if (media & ADVERTISE_FULL) reg |= MACB_BIT(FD); macb_writel(bp, NCFGR, reg); spin_unlock_irq(&bp->lock); } static void macb_check_media(struct macb *bp, int ok_to_print, int init_media) { struct mii_if_info *mii = &bp->mii; unsigned int old_carrier, new_carrier; int advertise, lpa, media, duplex; /* if forced media, go no further */ if (mii->force_media) return; /* check current and old link status */ old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0; new_carrier = (unsigned int) mii_link_ok(mii); /* if carrier state did not change, assume nothing else did */ if (!init_media && old_carrier == new_carrier) return; /* no carrier, nothing much to do */ if (!new_carrier) { netif_carrier_off(mii->dev); printk(KERN_INFO "%s: link down\n", mii->dev->name); return; } /* * we have carrier, see who's on the other end */ netif_carrier_on(mii->dev); /* get MII advertise and LPA values */ if (!init_media && mii->advertising) { advertise = mii->advertising; } else { advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE); mii->advertising = advertise; } lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA); /* figure out media and duplex from advertise and LPA values */ media = mii_nway_result(lpa & advertise); duplex = (media & ADVERTISE_FULL) ? 1 : 0; if (ok_to_print) printk(KERN_INFO "%s: link up, %sMbps, %s-duplex, lpa 0x%04X\n", mii->dev->name, media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? "100" : "10", duplex ? "full" : "half", lpa); mii->full_duplex = duplex; /* Let the MAC know about the new link state */ macb_set_media(bp, media); } static void macb_update_stats(struct macb *bp) { u32 __iomem *reg = bp->regs + MACB_PFR; u32 *p = &bp->hw_stats.rx_pause_frames; u32 *end = &bp->hw_stats.tx_pause_frames + 1; WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4); for(; p < end; p++, reg++) *p += readl(reg); } static void macb_periodic_task(struct work_struct *work) { struct macb *bp = container_of(work, struct macb, periodic_task.work); macb_update_stats(bp); macb_check_media(bp, 1, 0); schedule_delayed_work(&bp->periodic_task, HZ); } static void macb_tx(struct macb *bp) { unsigned int tail; unsigned int head; u32 status; status = macb_readl(bp, TSR); macb_writel(bp, TSR, status); dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n", (unsigned long)status); if (status & MACB_BIT(UND)) { printk(KERN_ERR "%s: TX underrun, resetting buffers\n", bp->dev->name); bp->tx_head = bp->tx_tail = 0; } if (!(status & MACB_BIT(COMP))) /* * This may happen when a buffer becomes complete * between reading the ISR and scanning the * descriptors. Nothing to worry about. */ return; head = bp->tx_head; for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) { struct ring_info *rp = &bp->tx_skb[tail]; struct sk_buff *skb = rp->skb; u32 bufstat; BUG_ON(skb == NULL); rmb(); bufstat = bp->tx_ring[tail].ctrl; if (!(bufstat & MACB_BIT(TX_USED))) break; dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n", tail, skb->data); dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len, DMA_TO_DEVICE); bp->stats.tx_packets++; bp->stats.tx_bytes += skb->len; rp->skb = NULL; dev_kfree_skb_irq(skb); } bp->tx_tail = tail; if (netif_queue_stopped(bp->dev) && TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH) netif_wake_queue(bp->dev); } static int macb_rx_frame(struct macb *bp, unsigned int first_frag, unsigned int last_frag) { unsigned int len; unsigned int frag; unsigned int offset = 0; struct sk_buff *skb; len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl); dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n", first_frag, last_frag, len); skb = dev_alloc_skb(len + RX_OFFSET); if (!skb) { bp->stats.rx_dropped++; for (frag = first_frag; ; frag = NEXT_RX(frag)) { bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); if (frag == last_frag) break; } wmb(); return 1; } skb_reserve(skb, RX_OFFSET); skb->dev = bp->dev; skb->ip_summed = CHECKSUM_NONE; skb_put(skb, len); for (frag = first_frag; ; frag = NEXT_RX(frag)) { unsigned int frag_len = RX_BUFFER_SIZE; if (offset + frag_len > len) { BUG_ON(frag != last_frag); frag_len = len - offset; } memcpy(skb->data + offset, bp->rx_buffers + (RX_BUFFER_SIZE * frag), frag_len); offset += RX_BUFFER_SIZE; bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); wmb(); if (frag == last_frag) break; } skb->protocol = eth_type_trans(skb, bp->dev); bp->stats.rx_packets++; bp->stats.rx_bytes += len; bp->dev->last_rx = jiffies; dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n", skb->len, skb->csum); netif_receive_skb(skb); return 0; } /* Mark DMA descriptors from begin up to and not including end as unused */ static void discard_partial_frame(struct macb *bp, unsigned int begin, unsigned int end) { unsigned int frag; for (frag = begin; frag != end; frag = NEXT_RX(frag)) bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); wmb(); /* * When this happens, the hardware stats registers for * whatever caused this is updated, so we don't have to record * anything. */ } static int macb_rx(struct macb *bp, int budget) { int received = 0; unsigned int tail = bp->rx_tail; int first_frag = -1; for (; budget > 0; tail = NEXT_RX(tail)) { u32 addr, ctrl; rmb(); addr = bp->rx_ring[tail].addr; ctrl = bp->rx_ring[tail].ctrl; if (!(addr & MACB_BIT(RX_USED))) break; if (ctrl & MACB_BIT(RX_SOF)) { if (first_frag != -1) discard_partial_frame(bp, first_frag, tail); first_frag = tail; } if (ctrl & MACB_BIT(RX_EOF)) { int dropped; BUG_ON(first_frag == -1); dropped = macb_rx_frame(bp, first_frag, tail); first_frag = -1; if (!dropped) { received++; budget--; } } } if (first_frag != -1) bp->rx_tail = first_frag; else bp->rx_tail = tail; return received; } static int macb_poll(struct net_device *dev, int *budget) { struct macb *bp = netdev_priv(dev); int orig_budget, work_done, retval = 0; u32 status; status = macb_readl(bp, RSR); macb_writel(bp, RSR, status); if (!status) { /* * This may happen if an interrupt was pending before * this function was called last time, and no packets * have been received since. */ netif_rx_complete(dev); goto out; } dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n", (unsigned long)status, *budget); if (!(status & MACB_BIT(REC))) { dev_warn(&bp->pdev->dev, "No RX buffers complete, status = %02lx\n", (unsigned long)status); netif_rx_complete(dev); goto out; } orig_budget = *budget; if (orig_budget > dev->quota) orig_budget = dev->quota; work_done = macb_rx(bp, orig_budget); if (work_done < orig_budget) { netif_rx_complete(dev); retval = 0; } else { retval = 1; } /* * We've done what we can to clean the buffers. Make sure we * get notified when new packets arrive. */ out: macb_writel(bp, IER, MACB_RX_INT_FLAGS); /* TODO: Handle errors */ return retval; } static irqreturn_t macb_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; struct macb *bp = netdev_priv(dev); u32 status; status = macb_readl(bp, ISR); if (unlikely(!status)) return IRQ_NONE; spin_lock(&bp->lock); while (status) { if (status & MACB_BIT(MFD)) complete(&bp->mdio_complete); /* close possible race with dev_close */ if (unlikely(!netif_running(dev))) { macb_writel(bp, IDR, ~0UL); break; } if (status & MACB_RX_INT_FLAGS) { if (netif_rx_schedule_prep(dev)) { /* * There's no point taking any more interrupts * until we have processed the buffers */ macb_writel(bp, IDR, MACB_RX_INT_FLAGS); dev_dbg(&bp->pdev->dev, "scheduling RX softirq\n"); __netif_rx_schedule(dev); } } if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND))) macb_tx(bp); /* * Link change detection isn't possible with RMII, so we'll * add that if/when we get our hands on a full-blown MII PHY. */ if (status & MACB_BIT(HRESP)) { /* * TODO: Reset the hardware, and maybe move the printk * to a lower-priority context as well (work queue?) */ printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n", dev->name); } status = macb_readl(bp, ISR); } spin_unlock(&bp->lock); return IRQ_HANDLED; } static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct macb *bp = netdev_priv(dev); dma_addr_t mapping; unsigned int len, entry; u32 ctrl; #ifdef DEBUG int i; dev_dbg(&bp->pdev->dev, "start_xmit: len %u head %p data %p tail %p end %p\n", skb->len, skb->head, skb->data, skb->tail, skb->end); dev_dbg(&bp->pdev->dev, "data:"); for (i = 0; i < 16; i++) printk(" %02x", (unsigned int)skb->data[i]); printk("\n"); #endif len = skb->len; spin_lock_irq(&bp->lock); /* This is a hard error, log it. */ if (TX_BUFFS_AVAIL(bp) < 1) { netif_stop_queue(dev); spin_unlock_irq(&bp->lock); dev_err(&bp->pdev->dev, "BUG! Tx Ring full when queue awake!\n"); dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n", bp->tx_head, bp->tx_tail); return 1; } entry = bp->tx_head; dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry); mapping = dma_map_single(&bp->pdev->dev, skb->data, len, DMA_TO_DEVICE); bp->tx_skb[entry].skb = skb; bp->tx_skb[entry].mapping = mapping; dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n", skb->data, (unsigned long)mapping); ctrl = MACB_BF(TX_FRMLEN, len); ctrl |= MACB_BIT(TX_LAST); if (entry == (TX_RING_SIZE - 1)) ctrl |= MACB_BIT(TX_WRAP); bp->tx_ring[entry].addr = mapping; bp->tx_ring[entry].ctrl = ctrl; wmb(); entry = NEXT_TX(entry); bp->tx_head = entry; macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); if (TX_BUFFS_AVAIL(bp) < 1) netif_stop_queue(dev); spin_unlock_irq(&bp->lock); dev->trans_start = jiffies; return 0; } static void macb_free_consistent(struct macb *bp) { if (bp->tx_skb) { kfree(bp->tx_skb); bp->tx_skb = NULL; } if (bp->rx_ring) { dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES, bp->rx_ring, bp->rx_ring_dma); bp->rx_ring = NULL; } if (bp->tx_ring) { dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES, bp->tx_ring, bp->tx_ring_dma); bp->tx_ring = NULL; } if (bp->rx_buffers) { dma_free_coherent(&bp->pdev->dev, RX_RING_SIZE * RX_BUFFER_SIZE, bp->rx_buffers, bp->rx_buffers_dma); bp->rx_buffers = NULL; } } static int macb_alloc_consistent(struct macb *bp) { int size; size = TX_RING_SIZE * sizeof(struct ring_info); bp->tx_skb = kmalloc(size, GFP_KERNEL); if (!bp->tx_skb) goto out_err; size = RX_RING_BYTES; bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, &bp->rx_ring_dma, GFP_KERNEL); if (!bp->rx_ring) goto out_err; dev_dbg(&bp->pdev->dev, "Allocated RX ring of %d bytes at %08lx (mapped %p)\n", size, (unsigned long)bp->rx_ring_dma, bp->rx_ring); size = TX_RING_BYTES; bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, &bp->tx_ring_dma, GFP_KERNEL); if (!bp->tx_ring) goto out_err; dev_dbg(&bp->pdev->dev, "Allocated TX ring of %d bytes at %08lx (mapped %p)\n", size, (unsigned long)bp->tx_ring_dma, bp->tx_ring); size = RX_RING_SIZE * RX_BUFFER_SIZE; bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size, &bp->rx_buffers_dma, GFP_KERNEL); if (!bp->rx_buffers) goto out_err; dev_dbg(&bp->pdev->dev, "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n", size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers); return 0; out_err: macb_free_consistent(bp); return -ENOMEM; } static void macb_init_rings(struct macb *bp) { int i; dma_addr_t addr; addr = bp->rx_buffers_dma; for (i = 0; i < RX_RING_SIZE; i++) { bp->rx_ring[i].addr = addr; bp->rx_ring[i].ctrl = 0; addr += RX_BUFFER_SIZE; } bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP); for (i = 0; i < TX_RING_SIZE; i++) { bp->tx_ring[i].addr = 0; bp->tx_ring[i].ctrl = MACB_BIT(TX_USED); } bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); bp->rx_tail = bp->tx_head = bp->tx_tail = 0; } static void macb_reset_hw(struct macb *bp) { /* Make sure we have the write buffer for ourselves */ wmb(); /* * Disable RX and TX (XXX: Should we halt the transmission * more gracefully?) */ macb_writel(bp, NCR, 0); /* Clear the stats registers (XXX: Update stats first?) */ macb_writel(bp, NCR, MACB_BIT(CLRSTAT)); /* Clear all status flags */ macb_writel(bp, TSR, ~0UL); macb_writel(bp, RSR, ~0UL); /* Disable all interrupts */ macb_writel(bp, IDR, ~0UL); macb_readl(bp, ISR); } static void macb_init_hw(struct macb *bp) { u32 config; macb_reset_hw(bp); __macb_set_hwaddr(bp); config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L); config |= MACB_BIT(PAE); /* PAuse Enable */ config |= MACB_BIT(DRFCS); /* Discard Rx FCS */ if (bp->dev->flags & IFF_PROMISC) config |= MACB_BIT(CAF); /* Copy All Frames */ if (!(bp->dev->flags & IFF_BROADCAST)) config |= MACB_BIT(NBC); /* No BroadCast */ macb_writel(bp, NCFGR, config); /* Initialize TX and RX buffers */ macb_writel(bp, RBQP, bp->rx_ring_dma); macb_writel(bp, TBQP, bp->tx_ring_dma); /* Enable TX and RX */ macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE)); /* Enable interrupts */ macb_writel(bp, IER, (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) | MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE) | MACB_BIT(TXERR) | MACB_BIT(TCOMP) | MACB_BIT(ISR_ROVR) | MACB_BIT(HRESP))); } static void macb_init_phy(struct net_device *dev) { struct macb *bp = netdev_priv(dev); /* Set some reasonable default settings */ macb_mdio_write(dev, bp->mii.phy_id, MII_ADVERTISE, ADVERTISE_CSMA | ADVERTISE_ALL); macb_mdio_write(dev, bp->mii.phy_id, MII_BMCR, (BMCR_SPEED100 | BMCR_ANENABLE | BMCR_ANRESTART | BMCR_FULLDPLX)); } static int macb_open(struct net_device *dev) { struct macb *bp = netdev_priv(dev); int err; dev_dbg(&bp->pdev->dev, "open\n"); if (!is_valid_ether_addr(dev->dev_addr)) return -EADDRNOTAVAIL; err = macb_alloc_consistent(bp); if (err) { printk(KERN_ERR "%s: Unable to allocate DMA memory (error %d)\n", dev->name, err); return err; } macb_init_rings(bp); macb_init_hw(bp); macb_init_phy(dev); macb_check_media(bp, 1, 1); netif_start_queue(dev); schedule_delayed_work(&bp->periodic_task, HZ); return 0; } static int macb_close(struct net_device *dev) { struct macb *bp = netdev_priv(dev); unsigned long flags; cancel_rearming_delayed_work(&bp->periodic_task); netif_stop_queue(dev); spin_lock_irqsave(&bp->lock, flags); macb_reset_hw(bp); netif_carrier_off(dev); spin_unlock_irqrestore(&bp->lock, flags); macb_free_consistent(bp); return 0; } static struct net_device_stats *macb_get_stats(struct net_device *dev) { struct macb *bp = netdev_priv(dev); struct net_device_stats *nstat = &bp->stats; struct macb_stats *hwstat = &bp->hw_stats; /* Convert HW stats into netdevice stats */ nstat->rx_errors = (hwstat->rx_fcs_errors + hwstat->rx_align_errors + hwstat->rx_resource_errors + hwstat->rx_overruns + hwstat->rx_oversize_pkts + hwstat->rx_jabbers + hwstat->rx_undersize_pkts + hwstat->sqe_test_errors + hwstat->rx_length_mismatch); nstat->tx_errors = (hwstat->tx_late_cols + hwstat->tx_excessive_cols + hwstat->tx_underruns + hwstat->tx_carrier_errors); nstat->collisions = (hwstat->tx_single_cols + hwstat->tx_multiple_cols + hwstat->tx_excessive_cols); nstat->rx_length_errors = (hwstat->rx_oversize_pkts + hwstat->rx_jabbers + hwstat->rx_undersize_pkts + hwstat->rx_length_mismatch); nstat->rx_over_errors = hwstat->rx_resource_errors; nstat->rx_crc_errors = hwstat->rx_fcs_errors; nstat->rx_frame_errors = hwstat->rx_align_errors; nstat->rx_fifo_errors = hwstat->rx_overruns; /* XXX: What does "missed" mean? */ nstat->tx_aborted_errors = hwstat->tx_excessive_cols; nstat->tx_carrier_errors = hwstat->tx_carrier_errors; nstat->tx_fifo_errors = hwstat->tx_underruns; /* Don't know about heartbeat or window errors... */ return nstat; } static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct macb *bp = netdev_priv(dev); int ret; unsigned long flags; spin_lock_irqsave(&bp->lock, flags); ret = mii_ethtool_gset(&bp->mii, cmd); spin_unlock_irqrestore(&bp->lock, flags); return ret; } static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct macb *bp = netdev_priv(dev); int ret; unsigned long flags; spin_lock_irqsave(&bp->lock, flags); ret = mii_ethtool_sset(&bp->mii, cmd); spin_unlock_irqrestore(&bp->lock, flags); return ret; } static void macb_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { struct macb *bp = netdev_priv(dev); strcpy(info->driver, bp->pdev->dev.driver->name); strcpy(info->version, "$Revision: 1.14 $"); strcpy(info->bus_info, bp->pdev->dev.bus_id); } static int macb_nway_reset(struct net_device *dev) { struct macb *bp = netdev_priv(dev); return mii_nway_restart(&bp->mii); } static struct ethtool_ops macb_ethtool_ops = { .get_settings = macb_get_settings, .set_settings = macb_set_settings, .get_drvinfo = macb_get_drvinfo, .nway_reset = macb_nway_reset, .get_link = ethtool_op_get_link, }; static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { struct macb *bp = netdev_priv(dev); int ret; unsigned long flags; if (!netif_running(dev)) return -EINVAL; spin_lock_irqsave(&bp->lock, flags); ret = generic_mii_ioctl(&bp->mii, if_mii(rq), cmd, NULL); spin_unlock_irqrestore(&bp->lock, flags); return ret; } static ssize_t macb_mii_show(const struct class_device *cd, char *buf, unsigned long addr) { struct net_device *dev = to_net_dev(cd); struct macb *bp = netdev_priv(dev); ssize_t ret = -EINVAL; if (netif_running(dev)) { int value; value = macb_mdio_read(dev, bp->mii.phy_id, addr); ret = sprintf(buf, "0x%04x\n", (uint16_t)value); } return ret; } #define MII_ENTRY(name, addr) \ static ssize_t show_##name(struct class_device *cd, char *buf) \ { \ return macb_mii_show(cd, buf, addr); \ } \ static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) MII_ENTRY(bmcr, MII_BMCR); MII_ENTRY(bmsr, MII_BMSR); MII_ENTRY(physid1, MII_PHYSID1); MII_ENTRY(physid2, MII_PHYSID2); MII_ENTRY(advertise, MII_ADVERTISE); MII_ENTRY(lpa, MII_LPA); MII_ENTRY(expansion, MII_EXPANSION); static struct attribute *macb_mii_attrs[] = { &class_device_attr_bmcr.attr, &class_device_attr_bmsr.attr, &class_device_attr_physid1.attr, &class_device_attr_physid2.attr, &class_device_attr_advertise.attr, &class_device_attr_lpa.attr, &class_device_attr_expansion.attr, NULL, }; static struct attribute_group macb_mii_group = { .name = "mii", .attrs = macb_mii_attrs, }; static void macb_unregister_sysfs(struct net_device *net) { struct class_device *class_dev = &net->class_dev; sysfs_remove_group(&class_dev->kobj, &macb_mii_group); } static int macb_register_sysfs(struct net_device *net) { struct class_device *class_dev = &net->class_dev; int ret; ret = sysfs_create_group(&class_dev->kobj, &macb_mii_group); if (ret) printk(KERN_WARNING "%s: sysfs mii attribute registration failed: %d\n", net->name, ret); return ret; } static int __devinit macb_probe(struct platform_device *pdev) { struct eth_platform_data *pdata; struct resource *regs; struct net_device *dev; struct macb *bp; unsigned long pclk_hz; u32 config; int err = -ENXIO; regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!regs) { dev_err(&pdev->dev, "no mmio resource defined\n"); goto err_out; } err = -ENOMEM; dev = alloc_etherdev(sizeof(*bp)); if (!dev) { dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n"); goto err_out; } SET_MODULE_OWNER(dev); SET_NETDEV_DEV(dev, &pdev->dev); /* TODO: Actually, we have some interesting features... */ dev->features |= 0; bp = netdev_priv(dev); bp->pdev = pdev; bp->dev = dev; spin_lock_init(&bp->lock); bp->pclk = clk_get(&pdev->dev, "pclk"); if (IS_ERR(bp->pclk)) { dev_err(&pdev->dev, "failed to get pclk\n"); goto err_out_free_dev; } bp->hclk = clk_get(&pdev->dev, "hclk"); if (IS_ERR(bp->hclk)) { dev_err(&pdev->dev, "failed to get hclk\n"); goto err_out_put_pclk; } clk_enable(bp->pclk); clk_enable(bp->hclk); bp->regs = ioremap(regs->start, regs->end - regs->start + 1); if (!bp->regs) { dev_err(&pdev->dev, "failed to map registers, aborting.\n"); err = -ENOMEM; goto err_out_disable_clocks; } dev->irq = platform_get_irq(pdev, 0); err = request_irq(dev->irq, macb_interrupt, SA_SAMPLE_RANDOM, dev->name, dev); if (err) { printk(KERN_ERR "%s: Unable to request IRQ %d (error %d)\n", dev->name, dev->irq, err); goto err_out_iounmap; } dev->open = macb_open; dev->stop = macb_close; dev->hard_start_xmit = macb_start_xmit; dev->get_stats = macb_get_stats; dev->do_ioctl = macb_ioctl; dev->poll = macb_poll; dev->weight = 64; dev->ethtool_ops = &macb_ethtool_ops; dev->base_addr = regs->start; INIT_DELAYED_WORK(&bp->periodic_task, macb_periodic_task); mutex_init(&bp->mdio_mutex); init_completion(&bp->mdio_complete); /* Set MII management clock divider */ pclk_hz = clk_get_rate(bp->pclk); if (pclk_hz <= 20000000) config = MACB_BF(CLK, MACB_CLK_DIV8); else if (pclk_hz <= 40000000) config = MACB_BF(CLK, MACB_CLK_DIV16); else if (pclk_hz <= 80000000) config = MACB_BF(CLK, MACB_CLK_DIV32); else config = MACB_BF(CLK, MACB_CLK_DIV64); macb_writel(bp, NCFGR, config); bp->mii.dev = dev; bp->mii.mdio_read = macb_mdio_read; bp->mii.mdio_write = macb_mdio_write; bp->mii.phy_id_mask = 0x1f; bp->mii.reg_num_mask = 0x1f; macb_get_hwaddr(bp); err = macb_phy_probe(bp); if (err) { dev_err(&pdev->dev, "Failed to detect PHY, aborting.\n"); goto err_out_free_irq; } pdata = pdev->dev.platform_data; if (pdata && pdata->is_rmii) macb_writel(bp, USRIO, 0); else macb_writel(bp, USRIO, MACB_BIT(MII)); bp->tx_pending = DEF_TX_RING_PENDING; err = register_netdev(dev); if (err) { dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); goto err_out_free_irq; } platform_set_drvdata(pdev, dev); macb_register_sysfs(dev); printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d " "(%02x:%02x:%02x:%02x:%02x:%02x)\n", dev->name, dev->base_addr, dev->irq, dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); return 0; err_out_free_irq: free_irq(dev->irq, dev); err_out_iounmap: iounmap(bp->regs); err_out_disable_clocks: clk_disable(bp->hclk); clk_disable(bp->pclk); clk_put(bp->hclk); err_out_put_pclk: clk_put(bp->pclk); err_out_free_dev: free_netdev(dev); err_out: platform_set_drvdata(pdev, NULL); return err; } static int __devexit macb_remove(struct platform_device *pdev) { struct net_device *dev; struct macb *bp; dev = platform_get_drvdata(pdev); if (dev) { bp = netdev_priv(dev); macb_unregister_sysfs(dev); unregister_netdev(dev); free_irq(dev->irq, dev); iounmap(bp->regs); clk_disable(bp->hclk); clk_disable(bp->pclk); clk_put(bp->hclk); clk_put(bp->pclk); free_netdev(dev); platform_set_drvdata(pdev, NULL); } return 0; } static struct platform_driver macb_driver = { .probe = macb_probe, .remove = __devexit_p(macb_remove), .driver = { .name = "macb", }, }; static int __init macb_init(void) { return platform_driver_register(&macb_driver); } static void __exit macb_exit(void) { platform_driver_unregister(&macb_driver); } module_init(macb_init); module_exit(macb_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Atmel MACB Ethernet driver"); MODULE_AUTHOR("Haavard Skinnemoen ");