2 * Atmel MACB Ethernet Controller driver
4 * Copyright (C) 2004-2006 Atmel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/clk.h>
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/init.h>
18 #include <linux/netdevice.h>
19 #include <linux/etherdevice.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/platform_device.h>
22 #include <linux/phy.h>
24 #include <asm/arch/board.h>
25 #include <asm/arch/cpu.h>
29 #define RX_BUFFER_SIZE 128
30 #define RX_RING_SIZE 512
31 #define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE)
33 /* Make the IP header word-aligned (the ethernet header is 14 bytes) */
36 #define TX_RING_SIZE 128
37 #define DEF_TX_RING_PENDING (TX_RING_SIZE - 1)
38 #define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE)
40 #define TX_RING_GAP(bp) \
41 (TX_RING_SIZE - (bp)->tx_pending)
42 #define TX_BUFFS_AVAIL(bp) \
43 (((bp)->tx_tail <= (bp)->tx_head) ? \
44 (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \
45 (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp))
46 #define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1))
48 #define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1))
50 /* minimum number of free TX descriptors before waking up TX process */
51 #define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4)
53 #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \
56 static void __macb_set_hwaddr(struct macb *bp)
61 bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
62 macb_writel(bp, SA1B, bottom);
63 top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
64 macb_writel(bp, SA1T, top);
67 static void __init macb_get_hwaddr(struct macb *bp)
73 bottom = macb_readl(bp, SA1B);
74 top = macb_readl(bp, SA1T);
76 addr[0] = bottom & 0xff;
77 addr[1] = (bottom >> 8) & 0xff;
78 addr[2] = (bottom >> 16) & 0xff;
79 addr[3] = (bottom >> 24) & 0xff;
81 addr[5] = (top >> 8) & 0xff;
83 if (is_valid_ether_addr(addr))
84 memcpy(bp->dev->dev_addr, addr, sizeof(addr));
87 static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
89 struct macb *bp = bus->priv;
92 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
93 | MACB_BF(RW, MACB_MAN_READ)
94 | MACB_BF(PHYA, mii_id)
95 | MACB_BF(REGA, regnum)
96 | MACB_BF(CODE, MACB_MAN_CODE)));
98 /* wait for end of transfer */
99 while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
102 value = MACB_BFEXT(DATA, macb_readl(bp, MAN));
107 static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
110 struct macb *bp = bus->priv;
112 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
113 | MACB_BF(RW, MACB_MAN_WRITE)
114 | MACB_BF(PHYA, mii_id)
115 | MACB_BF(REGA, regnum)
116 | MACB_BF(CODE, MACB_MAN_CODE)
117 | MACB_BF(DATA, value)));
119 /* wait for end of transfer */
120 while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
126 static int macb_mdio_reset(struct mii_bus *bus)
131 static void macb_handle_link_change(struct net_device *dev)
133 struct macb *bp = netdev_priv(dev);
134 struct phy_device *phydev = bp->phy_dev;
137 int status_change = 0;
139 spin_lock_irqsave(&bp->lock, flags);
142 if ((bp->speed != phydev->speed) ||
143 (bp->duplex != phydev->duplex)) {
146 reg = macb_readl(bp, NCFGR);
147 reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
152 reg |= MACB_BIT(SPD);
154 macb_writel(bp, NCFGR, reg);
156 bp->speed = phydev->speed;
157 bp->duplex = phydev->duplex;
162 if (phydev->link != bp->link) {
169 bp->link = phydev->link;
174 spin_unlock_irqrestore(&bp->lock, flags);
178 printk(KERN_INFO "%s: link up (%d/%s)\n",
179 dev->name, phydev->speed,
180 DUPLEX_FULL == phydev->duplex ? "Full":"Half");
182 printk(KERN_INFO "%s: link down\n", dev->name);
186 /* based on au1000_eth. c*/
187 static int macb_mii_probe(struct net_device *dev)
189 struct macb *bp = netdev_priv(dev);
190 struct phy_device *phydev = NULL;
191 struct eth_platform_data *pdata;
194 /* find the first phy */
195 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
196 if (bp->mii_bus.phy_map[phy_addr]) {
197 phydev = bp->mii_bus.phy_map[phy_addr];
203 printk (KERN_ERR "%s: no PHY found\n", dev->name);
207 pdata = bp->pdev->dev.platform_data;
208 /* TODO : add pin_irq */
210 /* attach the mac to the phy */
211 if (pdata && pdata->is_rmii) {
212 phydev = phy_connect(dev, phydev->dev.bus_id,
213 &macb_handle_link_change, 0, PHY_INTERFACE_MODE_RMII);
215 phydev = phy_connect(dev, phydev->dev.bus_id,
216 &macb_handle_link_change, 0, PHY_INTERFACE_MODE_MII);
219 if (IS_ERR(phydev)) {
220 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
221 return PTR_ERR(phydev);
224 /* mask with MAC supported features */
225 phydev->supported &= PHY_BASIC_FEATURES;
227 phydev->advertising = phydev->supported;
232 bp->phy_dev = phydev;
237 static int macb_mii_init(struct macb *bp)
239 struct eth_platform_data *pdata;
242 /* Enable managment port */
243 macb_writel(bp, NCR, MACB_BIT(MPE));
245 bp->mii_bus.name = "MACB_mii_bus",
246 bp->mii_bus.read = &macb_mdio_read,
247 bp->mii_bus.write = &macb_mdio_write,
248 bp->mii_bus.reset = &macb_mdio_reset,
249 bp->mii_bus.id = bp->pdev->id,
250 bp->mii_bus.priv = bp,
251 bp->mii_bus.dev = &bp->dev->dev;
252 pdata = bp->pdev->dev.platform_data;
255 bp->mii_bus.phy_mask = pdata->phy_mask;
257 bp->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
258 if (!bp->mii_bus.irq) {
263 for (i = 0; i < PHY_MAX_ADDR; i++)
264 bp->mii_bus.irq[i] = PHY_POLL;
266 platform_set_drvdata(bp->dev, &bp->mii_bus);
268 if (mdiobus_register(&bp->mii_bus))
269 goto err_out_free_mdio_irq;
271 if (macb_mii_probe(bp->dev) != 0) {
272 goto err_out_unregister_bus;
277 err_out_unregister_bus:
278 mdiobus_unregister(&bp->mii_bus);
279 err_out_free_mdio_irq:
280 kfree(bp->mii_bus.irq);
285 static void macb_update_stats(struct macb *bp)
287 u32 __iomem *reg = bp->regs + MACB_PFR;
288 u32 *p = &bp->hw_stats.rx_pause_frames;
289 u32 *end = &bp->hw_stats.tx_pause_frames + 1;
291 WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
293 for(; p < end; p++, reg++)
294 *p += __raw_readl(reg);
297 static void macb_tx(struct macb *bp)
303 status = macb_readl(bp, TSR);
304 macb_writel(bp, TSR, status);
306 dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n",
307 (unsigned long)status);
309 if (status & MACB_BIT(UND)) {
310 printk(KERN_ERR "%s: TX underrun, resetting buffers\n",
312 bp->tx_head = bp->tx_tail = 0;
315 if (!(status & MACB_BIT(COMP)))
317 * This may happen when a buffer becomes complete
318 * between reading the ISR and scanning the
319 * descriptors. Nothing to worry about.
324 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
325 struct ring_info *rp = &bp->tx_skb[tail];
326 struct sk_buff *skb = rp->skb;
332 bufstat = bp->tx_ring[tail].ctrl;
334 if (!(bufstat & MACB_BIT(TX_USED)))
337 dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n",
339 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
341 bp->stats.tx_packets++;
342 bp->stats.tx_bytes += skb->len;
344 dev_kfree_skb_irq(skb);
348 if (netif_queue_stopped(bp->dev) &&
349 TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH)
350 netif_wake_queue(bp->dev);
353 static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
354 unsigned int last_frag)
358 unsigned int offset = 0;
361 len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl);
363 dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n",
364 first_frag, last_frag, len);
366 skb = dev_alloc_skb(len + RX_OFFSET);
368 bp->stats.rx_dropped++;
369 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
370 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
371 if (frag == last_frag)
378 skb_reserve(skb, RX_OFFSET);
379 skb->ip_summed = CHECKSUM_NONE;
382 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
383 unsigned int frag_len = RX_BUFFER_SIZE;
385 if (offset + frag_len > len) {
386 BUG_ON(frag != last_frag);
387 frag_len = len - offset;
389 skb_copy_to_linear_data_offset(skb, offset,
391 (RX_BUFFER_SIZE * frag)),
393 offset += RX_BUFFER_SIZE;
394 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
397 if (frag == last_frag)
401 skb->protocol = eth_type_trans(skb, bp->dev);
403 bp->stats.rx_packets++;
404 bp->stats.rx_bytes += len;
405 bp->dev->last_rx = jiffies;
406 dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n",
407 skb->len, skb->csum);
408 netif_receive_skb(skb);
413 /* Mark DMA descriptors from begin up to and not including end as unused */
414 static void discard_partial_frame(struct macb *bp, unsigned int begin,
419 for (frag = begin; frag != end; frag = NEXT_RX(frag))
420 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
424 * When this happens, the hardware stats registers for
425 * whatever caused this is updated, so we don't have to record
430 static int macb_rx(struct macb *bp, int budget)
433 unsigned int tail = bp->rx_tail;
436 for (; budget > 0; tail = NEXT_RX(tail)) {
440 addr = bp->rx_ring[tail].addr;
441 ctrl = bp->rx_ring[tail].ctrl;
443 if (!(addr & MACB_BIT(RX_USED)))
446 if (ctrl & MACB_BIT(RX_SOF)) {
447 if (first_frag != -1)
448 discard_partial_frame(bp, first_frag, tail);
452 if (ctrl & MACB_BIT(RX_EOF)) {
454 BUG_ON(first_frag == -1);
456 dropped = macb_rx_frame(bp, first_frag, tail);
465 if (first_frag != -1)
466 bp->rx_tail = first_frag;
473 static int macb_poll(struct napi_struct *napi, int budget)
475 struct macb *bp = container_of(napi, struct macb, napi);
476 struct net_device *dev = bp->dev;
480 status = macb_readl(bp, RSR);
481 macb_writel(bp, RSR, status);
486 * This may happen if an interrupt was pending before
487 * this function was called last time, and no packets
488 * have been received since.
490 netif_rx_complete(dev, napi);
494 dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
495 (unsigned long)status, budget);
497 if (!(status & MACB_BIT(REC))) {
498 dev_warn(&bp->pdev->dev,
499 "No RX buffers complete, status = %02lx\n",
500 (unsigned long)status);
501 netif_rx_complete(dev, napi);
505 work_done = macb_rx(bp, budget);
506 if (work_done < budget)
507 netif_rx_complete(dev, napi);
510 * We've done what we can to clean the buffers. Make sure we
511 * get notified when new packets arrive.
514 macb_writel(bp, IER, MACB_RX_INT_FLAGS);
516 /* TODO: Handle errors */
521 static irqreturn_t macb_interrupt(int irq, void *dev_id)
523 struct net_device *dev = dev_id;
524 struct macb *bp = netdev_priv(dev);
527 status = macb_readl(bp, ISR);
529 if (unlikely(!status))
532 spin_lock(&bp->lock);
535 /* close possible race with dev_close */
536 if (unlikely(!netif_running(dev))) {
537 macb_writel(bp, IDR, ~0UL);
541 if (status & MACB_RX_INT_FLAGS) {
542 if (netif_rx_schedule_prep(dev, &bp->napi)) {
544 * There's no point taking any more interrupts
545 * until we have processed the buffers
547 macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
548 dev_dbg(&bp->pdev->dev,
549 "scheduling RX softirq\n");
550 __netif_rx_schedule(dev, &bp->napi);
554 if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND)))
558 * Link change detection isn't possible with RMII, so we'll
559 * add that if/when we get our hands on a full-blown MII PHY.
562 if (status & MACB_BIT(HRESP)) {
564 * TODO: Reset the hardware, and maybe move the printk
565 * to a lower-priority context as well (work queue?)
567 printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n",
571 status = macb_readl(bp, ISR);
574 spin_unlock(&bp->lock);
579 static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
581 struct macb *bp = netdev_priv(dev);
583 unsigned int len, entry;
588 dev_dbg(&bp->pdev->dev,
589 "start_xmit: len %u head %p data %p tail %p end %p\n",
590 skb->len, skb->head, skb->data,
591 skb_tail_pointer(skb), skb_end_pointer(skb));
592 dev_dbg(&bp->pdev->dev,
594 for (i = 0; i < 16; i++)
595 printk(" %02x", (unsigned int)skb->data[i]);
600 spin_lock_irq(&bp->lock);
602 /* This is a hard error, log it. */
603 if (TX_BUFFS_AVAIL(bp) < 1) {
604 netif_stop_queue(dev);
605 spin_unlock_irq(&bp->lock);
606 dev_err(&bp->pdev->dev,
607 "BUG! Tx Ring full when queue awake!\n");
608 dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n",
609 bp->tx_head, bp->tx_tail);
614 dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry);
615 mapping = dma_map_single(&bp->pdev->dev, skb->data,
617 bp->tx_skb[entry].skb = skb;
618 bp->tx_skb[entry].mapping = mapping;
619 dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n",
620 skb->data, (unsigned long)mapping);
622 ctrl = MACB_BF(TX_FRMLEN, len);
623 ctrl |= MACB_BIT(TX_LAST);
624 if (entry == (TX_RING_SIZE - 1))
625 ctrl |= MACB_BIT(TX_WRAP);
627 bp->tx_ring[entry].addr = mapping;
628 bp->tx_ring[entry].ctrl = ctrl;
631 entry = NEXT_TX(entry);
634 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
636 if (TX_BUFFS_AVAIL(bp) < 1)
637 netif_stop_queue(dev);
639 spin_unlock_irq(&bp->lock);
641 dev->trans_start = jiffies;
646 static void macb_free_consistent(struct macb *bp)
653 dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES,
654 bp->rx_ring, bp->rx_ring_dma);
658 dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES,
659 bp->tx_ring, bp->tx_ring_dma);
662 if (bp->rx_buffers) {
663 dma_free_coherent(&bp->pdev->dev,
664 RX_RING_SIZE * RX_BUFFER_SIZE,
665 bp->rx_buffers, bp->rx_buffers_dma);
666 bp->rx_buffers = NULL;
670 static int macb_alloc_consistent(struct macb *bp)
674 size = TX_RING_SIZE * sizeof(struct ring_info);
675 bp->tx_skb = kmalloc(size, GFP_KERNEL);
679 size = RX_RING_BYTES;
680 bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
681 &bp->rx_ring_dma, GFP_KERNEL);
684 dev_dbg(&bp->pdev->dev,
685 "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
686 size, (unsigned long)bp->rx_ring_dma, bp->rx_ring);
688 size = TX_RING_BYTES;
689 bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
690 &bp->tx_ring_dma, GFP_KERNEL);
693 dev_dbg(&bp->pdev->dev,
694 "Allocated TX ring of %d bytes at %08lx (mapped %p)\n",
695 size, (unsigned long)bp->tx_ring_dma, bp->tx_ring);
697 size = RX_RING_SIZE * RX_BUFFER_SIZE;
698 bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
699 &bp->rx_buffers_dma, GFP_KERNEL);
702 dev_dbg(&bp->pdev->dev,
703 "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
704 size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers);
709 macb_free_consistent(bp);
713 static void macb_init_rings(struct macb *bp)
718 addr = bp->rx_buffers_dma;
719 for (i = 0; i < RX_RING_SIZE; i++) {
720 bp->rx_ring[i].addr = addr;
721 bp->rx_ring[i].ctrl = 0;
722 addr += RX_BUFFER_SIZE;
724 bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP);
726 for (i = 0; i < TX_RING_SIZE; i++) {
727 bp->tx_ring[i].addr = 0;
728 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
730 bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
732 bp->rx_tail = bp->tx_head = bp->tx_tail = 0;
735 static void macb_reset_hw(struct macb *bp)
737 /* Make sure we have the write buffer for ourselves */
741 * Disable RX and TX (XXX: Should we halt the transmission
744 macb_writel(bp, NCR, 0);
746 /* Clear the stats registers (XXX: Update stats first?) */
747 macb_writel(bp, NCR, MACB_BIT(CLRSTAT));
749 /* Clear all status flags */
750 macb_writel(bp, TSR, ~0UL);
751 macb_writel(bp, RSR, ~0UL);
753 /* Disable all interrupts */
754 macb_writel(bp, IDR, ~0UL);
758 static void macb_init_hw(struct macb *bp)
763 __macb_set_hwaddr(bp);
765 config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L);
766 config |= MACB_BIT(PAE); /* PAuse Enable */
767 config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
768 if (bp->dev->flags & IFF_PROMISC)
769 config |= MACB_BIT(CAF); /* Copy All Frames */
770 if (!(bp->dev->flags & IFF_BROADCAST))
771 config |= MACB_BIT(NBC); /* No BroadCast */
772 macb_writel(bp, NCFGR, config);
774 /* Initialize TX and RX buffers */
775 macb_writel(bp, RBQP, bp->rx_ring_dma);
776 macb_writel(bp, TBQP, bp->tx_ring_dma);
778 /* Enable TX and RX */
779 macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE));
781 /* Enable interrupts */
782 macb_writel(bp, IER, (MACB_BIT(RCOMP)
794 * The hash address register is 64 bits long and takes up two
795 * locations in the memory map. The least significant bits are stored
796 * in EMAC_HSL and the most significant bits in EMAC_HSH.
798 * The unicast hash enable and the multicast hash enable bits in the
799 * network configuration register enable the reception of hash matched
800 * frames. The destination address is reduced to a 6 bit index into
801 * the 64 bit hash register using the following hash function. The
802 * hash function is an exclusive or of every sixth bit of the
803 * destination address.
805 * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
806 * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
807 * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
808 * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
809 * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
810 * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
812 * da[0] represents the least significant bit of the first byte
813 * received, that is, the multicast/unicast indicator, and da[47]
814 * represents the most significant bit of the last byte received. If
815 * the hash index, hi[n], points to a bit that is set in the hash
816 * register then the frame will be matched according to whether the
817 * frame is multicast or unicast. A multicast match will be signalled
818 * if the multicast hash enable bit is set, da[0] is 1 and the hash
819 * index points to a bit set in the hash register. A unicast match
820 * will be signalled if the unicast hash enable bit is set, da[0] is 0
821 * and the hash index points to a bit set in the hash register. To
822 * receive all multicast frames, the hash register should be set with
823 * all ones and the multicast hash enable bit should be set in the
824 * network configuration register.
827 static inline int hash_bit_value(int bitnr, __u8 *addr)
829 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
835 * Return the hash index value for the specified address.
837 static int hash_get_index(__u8 *addr)
842 for (j = 0; j < 6; j++) {
843 for (i = 0, bitval = 0; i < 8; i++)
844 bitval ^= hash_bit_value(i*6 + j, addr);
846 hash_index |= (bitval << j);
853 * Add multicast addresses to the internal multicast-hash table.
855 static void macb_sethashtable(struct net_device *dev)
857 struct dev_mc_list *curr;
858 unsigned long mc_filter[2];
859 unsigned int i, bitnr;
860 struct macb *bp = netdev_priv(dev);
862 mc_filter[0] = mc_filter[1] = 0;
865 for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
866 if (!curr) break; /* unexpected end of list */
868 bitnr = hash_get_index(curr->dmi_addr);
869 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
872 macb_writel(bp, HRB, mc_filter[0]);
873 macb_writel(bp, HRT, mc_filter[1]);
877 * Enable/Disable promiscuous and multicast modes.
879 static void macb_set_rx_mode(struct net_device *dev)
882 struct macb *bp = netdev_priv(dev);
884 cfg = macb_readl(bp, NCFGR);
886 if (dev->flags & IFF_PROMISC)
887 /* Enable promiscuous mode */
888 cfg |= MACB_BIT(CAF);
889 else if (dev->flags & (~IFF_PROMISC))
890 /* Disable promiscuous mode */
891 cfg &= ~MACB_BIT(CAF);
893 if (dev->flags & IFF_ALLMULTI) {
894 /* Enable all multicast mode */
895 macb_writel(bp, HRB, -1);
896 macb_writel(bp, HRT, -1);
897 cfg |= MACB_BIT(NCFGR_MTI);
898 } else if (dev->mc_count > 0) {
899 /* Enable specific multicasts */
900 macb_sethashtable(dev);
901 cfg |= MACB_BIT(NCFGR_MTI);
902 } else if (dev->flags & (~IFF_ALLMULTI)) {
903 /* Disable all multicast mode */
904 macb_writel(bp, HRB, 0);
905 macb_writel(bp, HRT, 0);
906 cfg &= ~MACB_BIT(NCFGR_MTI);
909 macb_writel(bp, NCFGR, cfg);
912 static int macb_open(struct net_device *dev)
914 struct macb *bp = netdev_priv(dev);
917 dev_dbg(&bp->pdev->dev, "open\n");
919 /* if the phy is not yet register, retry later*/
923 if (!is_valid_ether_addr(dev->dev_addr))
924 return -EADDRNOTAVAIL;
926 err = macb_alloc_consistent(bp);
929 "%s: Unable to allocate DMA memory (error %d)\n",
934 napi_enable(&bp->napi);
939 /* schedule a link state check */
940 phy_start(bp->phy_dev);
942 netif_start_queue(dev);
947 static int macb_close(struct net_device *dev)
949 struct macb *bp = netdev_priv(dev);
952 netif_stop_queue(dev);
953 napi_disable(&bp->napi);
956 phy_stop(bp->phy_dev);
958 spin_lock_irqsave(&bp->lock, flags);
960 netif_carrier_off(dev);
961 spin_unlock_irqrestore(&bp->lock, flags);
963 macb_free_consistent(bp);
968 static struct net_device_stats *macb_get_stats(struct net_device *dev)
970 struct macb *bp = netdev_priv(dev);
971 struct net_device_stats *nstat = &bp->stats;
972 struct macb_stats *hwstat = &bp->hw_stats;
974 /* read stats from hardware */
975 macb_update_stats(bp);
977 /* Convert HW stats into netdevice stats */
978 nstat->rx_errors = (hwstat->rx_fcs_errors +
979 hwstat->rx_align_errors +
980 hwstat->rx_resource_errors +
981 hwstat->rx_overruns +
982 hwstat->rx_oversize_pkts +
984 hwstat->rx_undersize_pkts +
985 hwstat->sqe_test_errors +
986 hwstat->rx_length_mismatch);
987 nstat->tx_errors = (hwstat->tx_late_cols +
988 hwstat->tx_excessive_cols +
989 hwstat->tx_underruns +
990 hwstat->tx_carrier_errors);
991 nstat->collisions = (hwstat->tx_single_cols +
992 hwstat->tx_multiple_cols +
993 hwstat->tx_excessive_cols);
994 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
996 hwstat->rx_undersize_pkts +
997 hwstat->rx_length_mismatch);
998 nstat->rx_over_errors = hwstat->rx_resource_errors;
999 nstat->rx_crc_errors = hwstat->rx_fcs_errors;
1000 nstat->rx_frame_errors = hwstat->rx_align_errors;
1001 nstat->rx_fifo_errors = hwstat->rx_overruns;
1002 /* XXX: What does "missed" mean? */
1003 nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
1004 nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
1005 nstat->tx_fifo_errors = hwstat->tx_underruns;
1006 /* Don't know about heartbeat or window errors... */
1011 static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1013 struct macb *bp = netdev_priv(dev);
1014 struct phy_device *phydev = bp->phy_dev;
1019 return phy_ethtool_gset(phydev, cmd);
1022 static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1024 struct macb *bp = netdev_priv(dev);
1025 struct phy_device *phydev = bp->phy_dev;
1030 return phy_ethtool_sset(phydev, cmd);
1033 static void macb_get_drvinfo(struct net_device *dev,
1034 struct ethtool_drvinfo *info)
1036 struct macb *bp = netdev_priv(dev);
1038 strcpy(info->driver, bp->pdev->dev.driver->name);
1039 strcpy(info->version, "$Revision: 1.14 $");
1040 strcpy(info->bus_info, bp->pdev->dev.bus_id);
1043 static struct ethtool_ops macb_ethtool_ops = {
1044 .get_settings = macb_get_settings,
1045 .set_settings = macb_set_settings,
1046 .get_drvinfo = macb_get_drvinfo,
1047 .get_link = ethtool_op_get_link,
1050 static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1052 struct macb *bp = netdev_priv(dev);
1053 struct phy_device *phydev = bp->phy_dev;
1055 if (!netif_running(dev))
1061 return phy_mii_ioctl(phydev, if_mii(rq), cmd);
1064 static int __devinit macb_probe(struct platform_device *pdev)
1066 struct eth_platform_data *pdata;
1067 struct resource *regs;
1068 struct net_device *dev;
1070 struct phy_device *phydev;
1071 unsigned long pclk_hz;
1074 DECLARE_MAC_BUF(mac);
1076 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1078 dev_err(&pdev->dev, "no mmio resource defined\n");
1083 dev = alloc_etherdev(sizeof(*bp));
1085 dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
1089 SET_NETDEV_DEV(dev, &pdev->dev);
1091 /* TODO: Actually, we have some interesting features... */
1094 bp = netdev_priv(dev);
1098 spin_lock_init(&bp->lock);
1100 #if defined(CONFIG_ARCH_AT91)
1101 bp->pclk = clk_get(&pdev->dev, "macb_clk");
1102 if (IS_ERR(bp->pclk)) {
1103 dev_err(&pdev->dev, "failed to get macb_clk\n");
1104 goto err_out_free_dev;
1106 clk_enable(bp->pclk);
1108 bp->pclk = clk_get(&pdev->dev, "pclk");
1109 if (IS_ERR(bp->pclk)) {
1110 dev_err(&pdev->dev, "failed to get pclk\n");
1111 goto err_out_free_dev;
1113 bp->hclk = clk_get(&pdev->dev, "hclk");
1114 if (IS_ERR(bp->hclk)) {
1115 dev_err(&pdev->dev, "failed to get hclk\n");
1116 goto err_out_put_pclk;
1119 clk_enable(bp->pclk);
1120 clk_enable(bp->hclk);
1123 bp->regs = ioremap(regs->start, regs->end - regs->start + 1);
1125 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
1127 goto err_out_disable_clocks;
1130 dev->irq = platform_get_irq(pdev, 0);
1131 err = request_irq(dev->irq, macb_interrupt, IRQF_SAMPLE_RANDOM,
1135 "%s: Unable to request IRQ %d (error %d)\n",
1136 dev->name, dev->irq, err);
1137 goto err_out_iounmap;
1140 dev->open = macb_open;
1141 dev->stop = macb_close;
1142 dev->hard_start_xmit = macb_start_xmit;
1143 dev->get_stats = macb_get_stats;
1144 dev->set_multicast_list = macb_set_rx_mode;
1145 dev->do_ioctl = macb_ioctl;
1146 netif_napi_add(dev, &bp->napi, macb_poll, 64);
1147 dev->ethtool_ops = &macb_ethtool_ops;
1149 dev->base_addr = regs->start;
1151 /* Set MII management clock divider */
1152 pclk_hz = clk_get_rate(bp->pclk);
1153 if (pclk_hz <= 20000000)
1154 config = MACB_BF(CLK, MACB_CLK_DIV8);
1155 else if (pclk_hz <= 40000000)
1156 config = MACB_BF(CLK, MACB_CLK_DIV16);
1157 else if (pclk_hz <= 80000000)
1158 config = MACB_BF(CLK, MACB_CLK_DIV32);
1160 config = MACB_BF(CLK, MACB_CLK_DIV64);
1161 macb_writel(bp, NCFGR, config);
1163 macb_get_hwaddr(bp);
1164 pdata = pdev->dev.platform_data;
1166 if (pdata && pdata->is_rmii)
1167 #if defined(CONFIG_ARCH_AT91)
1168 macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
1170 macb_writel(bp, USRIO, 0);
1173 #if defined(CONFIG_ARCH_AT91)
1174 macb_writel(bp, USRIO, MACB_BIT(CLKEN));
1176 macb_writel(bp, USRIO, MACB_BIT(MII));
1179 bp->tx_pending = DEF_TX_RING_PENDING;
1181 err = register_netdev(dev);
1183 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
1184 goto err_out_free_irq;
1187 if (macb_mii_init(bp) != 0) {
1188 goto err_out_unregister_netdev;
1191 platform_set_drvdata(pdev, dev);
1193 printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d "
1195 dev->name, dev->base_addr, dev->irq,
1196 print_mac(mac, dev->dev_addr));
1198 phydev = bp->phy_dev;
1199 printk(KERN_INFO "%s: attached PHY driver [%s] "
1200 "(mii_bus:phy_addr=%s, irq=%d)\n",
1201 dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
1205 err_out_unregister_netdev:
1206 unregister_netdev(dev);
1208 free_irq(dev->irq, dev);
1211 err_out_disable_clocks:
1212 #ifndef CONFIG_ARCH_AT91
1213 clk_disable(bp->hclk);
1216 clk_disable(bp->pclk);
1217 #ifndef CONFIG_ARCH_AT91
1224 platform_set_drvdata(pdev, NULL);
1228 static int __devexit macb_remove(struct platform_device *pdev)
1230 struct net_device *dev;
1233 dev = platform_get_drvdata(pdev);
1236 bp = netdev_priv(dev);
1237 mdiobus_unregister(&bp->mii_bus);
1238 kfree(bp->mii_bus.irq);
1239 unregister_netdev(dev);
1240 free_irq(dev->irq, dev);
1242 #ifndef CONFIG_ARCH_AT91
1243 clk_disable(bp->hclk);
1246 clk_disable(bp->pclk);
1249 platform_set_drvdata(pdev, NULL);
1255 static struct platform_driver macb_driver = {
1256 .probe = macb_probe,
1257 .remove = __devexit_p(macb_remove),
1263 static int __init macb_init(void)
1265 return platform_driver_register(&macb_driver);
1268 static void __exit macb_exit(void)
1270 platform_driver_unregister(&macb_driver);
1273 module_init(macb_init);
1274 module_exit(macb_exit);
1276 MODULE_LICENSE("GPL");
1277 MODULE_DESCRIPTION("Atmel MACB Ethernet driver");
1278 MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");