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-rw-r--r--drivers/net/macb.c1366
1 files changed, 0 insertions, 1366 deletions
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
deleted file mode 100644
index dc4e305a1087..000000000000
--- a/drivers/net/macb.c
+++ /dev/null
@@ -1,1366 +0,0 @@
-/*
- * 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 <linux/clk.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/dma-mapping.h>
-#include <linux/platform_device.h>
-#include <linux/phy.h>
-
-#include <mach/board.h>
-#include <mach/cpu.h>
-
-#include "macb.h"
-
-#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));
- } else {
- dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
- random_ether_addr(bp->dev->dev_addr);
- }
-}
-
-static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
-{
- struct macb *bp = bus->priv;
- int value;
-
- macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
- | MACB_BF(RW, MACB_MAN_READ)
- | MACB_BF(PHYA, mii_id)
- | MACB_BF(REGA, regnum)
- | MACB_BF(CODE, MACB_MAN_CODE)));
-
- /* wait for end of transfer */
- while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
- cpu_relax();
-
- value = MACB_BFEXT(DATA, macb_readl(bp, MAN));
-
- return value;
-}
-
-static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
- u16 value)
-{
- struct macb *bp = bus->priv;
-
- macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
- | MACB_BF(RW, MACB_MAN_WRITE)
- | MACB_BF(PHYA, mii_id)
- | MACB_BF(REGA, regnum)
- | MACB_BF(CODE, MACB_MAN_CODE)
- | MACB_BF(DATA, value)));
-
- /* wait for end of transfer */
- while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
- cpu_relax();
-
- return 0;
-}
-
-static int macb_mdio_reset(struct mii_bus *bus)
-{
- return 0;
-}
-
-static void macb_handle_link_change(struct net_device *dev)
-{
- struct macb *bp = netdev_priv(dev);
- struct phy_device *phydev = bp->phy_dev;
- unsigned long flags;
-
- int status_change = 0;
-
- spin_lock_irqsave(&bp->lock, flags);
-
- if (phydev->link) {
- if ((bp->speed != phydev->speed) ||
- (bp->duplex != phydev->duplex)) {
- u32 reg;
-
- reg = macb_readl(bp, NCFGR);
- reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
-
- if (phydev->duplex)
- reg |= MACB_BIT(FD);
- if (phydev->speed == SPEED_100)
- reg |= MACB_BIT(SPD);
-
- macb_writel(bp, NCFGR, reg);
-
- bp->speed = phydev->speed;
- bp->duplex = phydev->duplex;
- status_change = 1;
- }
- }
-
- if (phydev->link != bp->link) {
- if (!phydev->link) {
- bp->speed = 0;
- bp->duplex = -1;
- }
- bp->link = phydev->link;
-
- status_change = 1;
- }
-
- spin_unlock_irqrestore(&bp->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);
- }
-}
-
-/* based on au1000_eth. c*/
-static int macb_mii_probe(struct net_device *dev)
-{
- struct macb *bp = netdev_priv(dev);
- struct phy_device *phydev;
- struct eth_platform_data *pdata;
- int ret;
-
- phydev = phy_find_first(bp->mii_bus);
- if (!phydev) {
- printk (KERN_ERR "%s: no PHY found\n", dev->name);
- return -1;
- }
-
- pdata = bp->pdev->dev.platform_data;
- /* TODO : add pin_irq */
-
- /* attach the mac to the phy */
- ret = phy_connect_direct(dev, phydev, &macb_handle_link_change, 0,
- pdata && pdata->is_rmii ?
- PHY_INTERFACE_MODE_RMII :
- PHY_INTERFACE_MODE_MII);
- if (ret) {
- printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
- return ret;
- }
-
- /* mask with MAC supported features */
- phydev->supported &= PHY_BASIC_FEATURES;
-
- phydev->advertising = phydev->supported;
-
- bp->link = 0;
- bp->speed = 0;
- bp->duplex = -1;
- bp->phy_dev = phydev;
-
- return 0;
-}
-
-static int macb_mii_init(struct macb *bp)
-{
- struct eth_platform_data *pdata;
- int err = -ENXIO, i;
-
- /* Enable management port */
- macb_writel(bp, NCR, MACB_BIT(MPE));
-
- bp->mii_bus = mdiobus_alloc();
- if (bp->mii_bus == NULL) {
- err = -ENOMEM;
- goto err_out;
- }
-
- bp->mii_bus->name = "MACB_mii_bus";
- bp->mii_bus->read = &macb_mdio_read;
- bp->mii_bus->write = &macb_mdio_write;
- bp->mii_bus->reset = &macb_mdio_reset;
- snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
- bp->mii_bus->priv = bp;
- bp->mii_bus->parent = &bp->dev->dev;
- pdata = bp->pdev->dev.platform_data;
-
- if (pdata)
- bp->mii_bus->phy_mask = pdata->phy_mask;
-
- bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
- if (!bp->mii_bus->irq) {
- err = -ENOMEM;
- goto err_out_free_mdiobus;
- }
-
- for (i = 0; i < PHY_MAX_ADDR; i++)
- bp->mii_bus->irq[i] = PHY_POLL;
-
- dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
-
- if (mdiobus_register(bp->mii_bus))
- goto err_out_free_mdio_irq;
-
- if (macb_mii_probe(bp->dev) != 0) {
- goto err_out_unregister_bus;
- }
-
- return 0;
-
-err_out_unregister_bus:
- mdiobus_unregister(bp->mii_bus);
-err_out_free_mdio_irq:
- kfree(bp->mii_bus->irq);
-err_out_free_mdiobus:
- mdiobus_free(bp->mii_bus);
-err_out:
- return err;
-}
-
-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 += __raw_readl(reg);
-}
-
-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) | MACB_BIT(TSR_RLE))) {
- int i;
- printk(KERN_ERR "%s: TX %s, resetting buffers\n",
- bp->dev->name, status & MACB_BIT(UND) ?
- "underrun" : "retry limit exceeded");
-
- /* Transfer ongoing, disable transmitter, to avoid confusion */
- if (status & MACB_BIT(TGO))
- macb_writel(bp, NCR, macb_readl(bp, NCR) & ~MACB_BIT(TE));
-
- head = bp->tx_head;
-
- /*Mark all the buffer as used to avoid sending a lost buffer*/
- for (i = 0; i < TX_RING_SIZE; i++)
- bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
-
- /* Add wrap bit */
- bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
-
- /* free transmit buffer in upper layer*/
- 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;
-
- BUG_ON(skb == NULL);
-
- rmb();
-
- dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
- DMA_TO_DEVICE);
- rp->skb = NULL;
- dev_kfree_skb_irq(skb);
- }
-
- bp->tx_head = bp->tx_tail = 0;
-
- /* Enable the transmitter again */
- if (status & MACB_BIT(TGO))
- macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TE));
- }
-
- 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_checksum_none_assert(skb);
- 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;
- }
- skb_copy_to_linear_data_offset(skb, 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;
- 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 napi_struct *napi, int budget)
-{
- struct macb *bp = container_of(napi, struct macb, napi);
- int work_done;
- u32 status;
-
- status = macb_readl(bp, RSR);
- macb_writel(bp, RSR, status);
-
- work_done = 0;
-
- dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
- (unsigned long)status, budget);
-
- work_done = macb_rx(bp, budget);
- if (work_done < budget) {
- napi_complete(napi);
-
- /*
- * We've done what we can to clean the buffers. Make sure we
- * get notified when new packets arrive.
- */
- macb_writel(bp, IER, MACB_RX_INT_FLAGS);
- }
-
- /* TODO: Handle errors */
-
- return work_done;
-}
-
-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) {
- /* close possible race with dev_close */
- if (unlikely(!netif_running(dev))) {
- macb_writel(bp, IDR, ~0UL);
- break;
- }
-
- if (status & MACB_RX_INT_FLAGS) {
- /*
- * There's no point taking any more interrupts
- * until we have processed the buffers. The
- * scheduling call may fail if the poll routine
- * is already scheduled, so disable interrupts
- * now.
- */
- macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
-
- if (napi_schedule_prep(&bp->napi)) {
- dev_dbg(&bp->pdev->dev,
- "scheduling RX softirq\n");
- __napi_schedule(&bp->napi);
- }
- }
-
- if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND) |
- MACB_BIT(ISR_RLE)))
- 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(ISR_ROVR)) {
- /* We missed at least one packet */
- bp->hw_stats.rx_overruns++;
- }
-
- 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;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-/*
- * Polling receive - used by netconsole and other diagnostic tools
- * to allow network i/o with interrupts disabled.
- */
-static void macb_poll_controller(struct net_device *dev)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- macb_interrupt(dev->irq, dev);
- local_irq_restore(flags);
-}
-#endif
-
-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;
- unsigned long flags;
-
-#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_pointer(skb), skb_end_pointer(skb));
- 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_irqsave(&bp->lock, flags);
-
- /* This is a hard error, log it. */
- if (TX_BUFFS_AVAIL(bp) < 1) {
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&bp->lock, flags);
- 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 NETDEV_TX_BUSY;
- }
-
- 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;
-
- skb_tx_timestamp(skb);
-
- macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
-
- if (TX_BUFFS_AVAIL(bp) < 1)
- netif_stop_queue(dev);
-
- spin_unlock_irqrestore(&bp->lock, flags);
-
- return NETDEV_TX_OK;
-}
-
-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 */
- config |= MACB_BIT(BIG); /* Receive oversized frames */
- 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) | MACB_BIT(MPE));
-
- /* 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)));
-
-}
-
-/*
- * The hash address register is 64 bits long and takes up two
- * locations in the memory map. The least significant bits are stored
- * in EMAC_HSL and the most significant bits in EMAC_HSH.
- *
- * The unicast hash enable and the multicast hash enable bits in the
- * network configuration register enable the reception of hash matched
- * frames. The destination address is reduced to a 6 bit index into
- * the 64 bit hash register using the following hash function. The
- * hash function is an exclusive or of every sixth bit of the
- * destination address.
- *
- * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
- * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
- * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
- * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
- * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
- * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
- *
- * da[0] represents the least significant bit of the first byte
- * received, that is, the multicast/unicast indicator, and da[47]
- * represents the most significant bit of the last byte received. If
- * the hash index, hi[n], points to a bit that is set in the hash
- * register then the frame will be matched according to whether the
- * frame is multicast or unicast. A multicast match will be signalled
- * if the multicast hash enable bit is set, da[0] is 1 and the hash
- * index points to a bit set in the hash register. A unicast match
- * will be signalled if the unicast hash enable bit is set, da[0] is 0
- * and the hash index points to a bit set in the hash register. To
- * receive all multicast frames, the hash register should be set with
- * all ones and the multicast hash enable bit should be set in the
- * network configuration register.
- */
-
-static inline int hash_bit_value(int bitnr, __u8 *addr)
-{
- if (addr[bitnr / 8] & (1 << (bitnr % 8)))
- return 1;
- return 0;
-}
-
-/*
- * Return the hash index value for the specified address.
- */
-static int hash_get_index(__u8 *addr)
-{
- int i, j, bitval;
- int hash_index = 0;
-
- for (j = 0; j < 6; j++) {
- for (i = 0, bitval = 0; i < 8; i++)
- bitval ^= hash_bit_value(i*6 + j, addr);
-
- hash_index |= (bitval << j);
- }
-
- return hash_index;
-}
-
-/*
- * Add multicast addresses to the internal multicast-hash table.
- */
-static void macb_sethashtable(struct net_device *dev)
-{
- struct netdev_hw_addr *ha;
- unsigned long mc_filter[2];
- unsigned int bitnr;
- struct macb *bp = netdev_priv(dev);
-
- mc_filter[0] = mc_filter[1] = 0;
-
- netdev_for_each_mc_addr(ha, dev) {
- bitnr = hash_get_index(ha->addr);
- mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
- }
-
- macb_writel(bp, HRB, mc_filter[0]);
- macb_writel(bp, HRT, mc_filter[1]);
-}
-
-/*
- * Enable/Disable promiscuous and multicast modes.
- */
-static void macb_set_rx_mode(struct net_device *dev)
-{
- unsigned long cfg;
- struct macb *bp = netdev_priv(dev);
-
- cfg = macb_readl(bp, NCFGR);
-
- if (dev->flags & IFF_PROMISC)
- /* Enable promiscuous mode */
- cfg |= MACB_BIT(CAF);
- else if (dev->flags & (~IFF_PROMISC))
- /* Disable promiscuous mode */
- cfg &= ~MACB_BIT(CAF);
-
- if (dev->flags & IFF_ALLMULTI) {
- /* Enable all multicast mode */
- macb_writel(bp, HRB, -1);
- macb_writel(bp, HRT, -1);
- cfg |= MACB_BIT(NCFGR_MTI);
- } else if (!netdev_mc_empty(dev)) {
- /* Enable specific multicasts */
- macb_sethashtable(dev);
- cfg |= MACB_BIT(NCFGR_MTI);
- } else if (dev->flags & (~IFF_ALLMULTI)) {
- /* Disable all multicast mode */
- macb_writel(bp, HRB, 0);
- macb_writel(bp, HRT, 0);
- cfg &= ~MACB_BIT(NCFGR_MTI);
- }
-
- macb_writel(bp, NCFGR, cfg);
-}
-
-static int macb_open(struct net_device *dev)
-{
- struct macb *bp = netdev_priv(dev);
- int err;
-
- dev_dbg(&bp->pdev->dev, "open\n");
-
- /* if the phy is not yet register, retry later*/
- if (!bp->phy_dev)
- return -EAGAIN;
-
- 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;
- }
-
- napi_enable(&bp->napi);
-
- macb_init_rings(bp);
- macb_init_hw(bp);
-
- /* schedule a link state check */
- phy_start(bp->phy_dev);
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int macb_close(struct net_device *dev)
-{
- struct macb *bp = netdev_priv(dev);
- unsigned long flags;
-
- netif_stop_queue(dev);
- napi_disable(&bp->napi);
-
- if (bp->phy_dev)
- phy_stop(bp->phy_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;
-
- /* read stats from hardware */
- macb_update_stats(bp);
-
- /* 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 +
- hwstat->rx_overruns;
- 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);
- struct phy_device *phydev = bp->phy_dev;
-
- if (!phydev)
- return -ENODEV;
-
- return phy_ethtool_gset(phydev, cmd);
-}
-
-static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
- struct macb *bp = netdev_priv(dev);
- struct phy_device *phydev = bp->phy_dev;
-
- if (!phydev)
- return -ENODEV;
-
- return phy_ethtool_sset(phydev, cmd);
-}
-
-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, dev_name(&bp->pdev->dev));
-}
-
-static const struct ethtool_ops macb_ethtool_ops = {
- .get_settings = macb_get_settings,
- .set_settings = macb_set_settings,
- .get_drvinfo = macb_get_drvinfo,
- .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);
- struct phy_device *phydev = bp->phy_dev;
-
- if (!netif_running(dev))
- return -EINVAL;
-
- if (!phydev)
- return -ENODEV;
-
- return phy_mii_ioctl(phydev, rq, cmd);
-}
-
-static const struct net_device_ops macb_netdev_ops = {
- .ndo_open = macb_open,
- .ndo_stop = macb_close,
- .ndo_start_xmit = macb_start_xmit,
- .ndo_set_multicast_list = macb_set_rx_mode,
- .ndo_get_stats = macb_get_stats,
- .ndo_do_ioctl = macb_ioctl,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
-#ifdef CONFIG_NET_POLL_CONTROLLER
- .ndo_poll_controller = macb_poll_controller,
-#endif
-};
-
-static int __init macb_probe(struct platform_device *pdev)
-{
- struct eth_platform_data *pdata;
- struct resource *regs;
- struct net_device *dev;
- struct macb *bp;
- struct phy_device *phydev;
- 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_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);
-
-#if defined(CONFIG_ARCH_AT91)
- bp->pclk = clk_get(&pdev->dev, "macb_clk");
- if (IS_ERR(bp->pclk)) {
- dev_err(&pdev->dev, "failed to get macb_clk\n");
- goto err_out_free_dev;
- }
- clk_enable(bp->pclk);
-#else
- 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);
-#endif
-
- bp->regs = ioremap(regs->start, resource_size(regs));
- 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, 0, 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->netdev_ops = &macb_netdev_ops;
- netif_napi_add(dev, &bp->napi, macb_poll, 64);
- dev->ethtool_ops = &macb_ethtool_ops;
-
- dev->base_addr = regs->start;
-
- /* 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);
-
- macb_get_hwaddr(bp);
- pdata = pdev->dev.platform_data;
-
- if (pdata && pdata->is_rmii)
-#if defined(CONFIG_ARCH_AT91)
- macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
-#else
- macb_writel(bp, USRIO, 0);
-#endif
- else
-#if defined(CONFIG_ARCH_AT91)
- macb_writel(bp, USRIO, MACB_BIT(CLKEN));
-#else
- macb_writel(bp, USRIO, MACB_BIT(MII));
-#endif
-
- 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;
- }
-
- if (macb_mii_init(bp) != 0) {
- goto err_out_unregister_netdev;
- }
-
- platform_set_drvdata(pdev, dev);
-
- printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d (%pM)\n",
- dev->name, dev->base_addr, dev->irq, dev->dev_addr);
-
- phydev = bp->phy_dev;
- printk(KERN_INFO "%s: attached PHY driver [%s] "
- "(mii_bus:phy_addr=%s, irq=%d)\n", dev->name,
- phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
-
- return 0;
-
-err_out_unregister_netdev:
- unregister_netdev(dev);
-err_out_free_irq:
- free_irq(dev->irq, dev);
-err_out_iounmap:
- iounmap(bp->regs);
-err_out_disable_clocks:
-#ifndef CONFIG_ARCH_AT91
- clk_disable(bp->hclk);
- clk_put(bp->hclk);
-#endif
- clk_disable(bp->pclk);
-#ifndef CONFIG_ARCH_AT91
-err_out_put_pclk:
-#endif
- clk_put(bp->pclk);
-err_out_free_dev:
- free_netdev(dev);
-err_out:
- platform_set_drvdata(pdev, NULL);
- return err;
-}
-
-static int __exit macb_remove(struct platform_device *pdev)
-{
- struct net_device *dev;
- struct macb *bp;
-
- dev = platform_get_drvdata(pdev);
-
- if (dev) {
- bp = netdev_priv(dev);
- if (bp->phy_dev)
- phy_disconnect(bp->phy_dev);
- mdiobus_unregister(bp->mii_bus);
- kfree(bp->mii_bus->irq);
- mdiobus_free(bp->mii_bus);
- unregister_netdev(dev);
- free_irq(dev->irq, dev);
- iounmap(bp->regs);
-#ifndef CONFIG_ARCH_AT91
- clk_disable(bp->hclk);
- clk_put(bp->hclk);
-#endif
- clk_disable(bp->pclk);
- clk_put(bp->pclk);
- free_netdev(dev);
- platform_set_drvdata(pdev, NULL);
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int macb_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct net_device *netdev = platform_get_drvdata(pdev);
- struct macb *bp = netdev_priv(netdev);
-
- netif_device_detach(netdev);
-
-#ifndef CONFIG_ARCH_AT91
- clk_disable(bp->hclk);
-#endif
- clk_disable(bp->pclk);
-
- return 0;
-}
-
-static int macb_resume(struct platform_device *pdev)
-{
- struct net_device *netdev = platform_get_drvdata(pdev);
- struct macb *bp = netdev_priv(netdev);
-
- clk_enable(bp->pclk);
-#ifndef CONFIG_ARCH_AT91
- clk_enable(bp->hclk);
-#endif
-
- netif_device_attach(netdev);
-
- return 0;
-}
-#else
-#define macb_suspend NULL
-#define macb_resume NULL
-#endif
-
-static struct platform_driver macb_driver = {
- .remove = __exit_p(macb_remove),
- .suspend = macb_suspend,
- .resume = macb_resume,
- .driver = {
- .name = "macb",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init macb_init(void)
-{
- return platform_driver_probe(&macb_driver, macb_probe);
-}
-
-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 (Atmel)");
-MODULE_ALIAS("platform:macb");