3 * Alchemy Au1x00 ethernet driver
5 * Copyright 2001-2003, 2006 MontaVista Software Inc.
6 * Copyright 2002 TimeSys Corp.
7 * Added ethtool/mii-tool support,
8 * Copyright 2004 Matt Porter <mporter@kernel.crashing.org>
9 * Update: 2004 Bjoern Riemer, riemer@fokus.fraunhofer.de
10 * or riemer@riemer-nt.de: fixed the link beat detection with
11 * ioctls (SIOCGMIIPHY)
12 * Copyright 2006 Herbert Valerio Riedel <hvr@gnu.org>
13 * converted to use linux-2.6.x's PHY framework
15 * Author: MontaVista Software, Inc.
16 * ppopov@mvista.com or source@mvista.com
18 * ########################################################################
20 * This program is free software; you can distribute it and/or modify it
21 * under the terms of the GNU General Public License (Version 2) as
22 * published by the Free Software Foundation.
24 * This program is distributed in the hope it will be useful, but WITHOUT
25 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
26 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
29 * You should have received a copy of the GNU General Public License along
30 * with this program; if not, write to the Free Software Foundation, Inc.,
31 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
33 * ########################################################################
37 #include <linux/capability.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/module.h>
40 #include <linux/kernel.h>
41 #include <linux/string.h>
42 #include <linux/timer.h>
43 #include <linux/errno.h>
45 #include <linux/ioport.h>
46 #include <linux/bitops.h>
47 #include <linux/slab.h>
48 #include <linux/interrupt.h>
49 #include <linux/init.h>
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
52 #include <linux/ethtool.h>
53 #include <linux/mii.h>
54 #include <linux/skbuff.h>
55 #include <linux/delay.h>
56 #include <linux/crc32.h>
57 #include <linux/phy.h>
58 #include <linux/platform_device.h>
61 #include <asm/mipsregs.h>
64 #include <asm/processor.h>
67 #include <au1xxx_eth.h>
70 #include "au1000_eth.h"
72 #ifdef AU1000_ETH_DEBUG
73 static int au1000_debug = 5;
75 static int au1000_debug = 3;
78 #define DRV_NAME "au1000_eth"
79 #define DRV_VERSION "1.6"
80 #define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>"
81 #define DRV_DESC "Au1xxx on-chip Ethernet driver"
83 MODULE_AUTHOR(DRV_AUTHOR);
84 MODULE_DESCRIPTION(DRV_DESC);
85 MODULE_LICENSE("GPL");
86 MODULE_VERSION(DRV_VERSION);
91 * The Au1000 MACs use a simple rx and tx descriptor ring scheme.
92 * There are four receive and four transmit descriptors. These
93 * descriptors are not in memory; rather, they are just a set of
96 * Since the Au1000 has a coherent data cache, the receive and
97 * transmit buffers are allocated from the KSEG0 segment. The
98 * hardware registers, however, are still mapped at KSEG1 to
99 * make sure there's no out-of-order writes, and that all writes
100 * complete immediately.
103 /* These addresses are only used if yamon doesn't tell us what
104 * the mac address is, and the mac address is not passed on the
107 static unsigned char au1000_mac_addr[6] __devinitdata = {
108 0x00, 0x50, 0xc2, 0x0c, 0x30, 0x00
111 struct au1000_private *au_macs[NUM_ETH_INTERFACES];
114 * board-specific configurations
116 * PHY detection algorithm
118 * If phy_static_config is undefined, the PHY setup is
121 * mii_probe() first searches the current MAC's MII bus for a PHY,
122 * selecting the first (or last, if phy_search_highest_addr is
123 * defined) PHY address not already claimed by another netdev.
125 * If nothing was found that way when searching for the 2nd ethernet
126 * controller's PHY and phy1_search_mac0 is defined, then
127 * the first MII bus is searched as well for an unclaimed PHY; this is
128 * needed in case of a dual-PHY accessible only through the MAC0's MII
131 * Finally, if no PHY is found, then the corresponding ethernet
132 * controller is not registered to the network subsystem.
135 /* autodetection defaults: phy1_search_mac0 */
139 * most boards PHY setup should be detectable properly with the
140 * autodetection algorithm in mii_probe(), but in some cases (e.g. if
141 * you have a switch attached, or want to use the PHY's interrupt
142 * notification capabilities) you can provide a static PHY
145 * IRQs may only be set, if a PHY address was configured
146 * If a PHY address is given, also a bus id is required to be set
148 * ps: make sure the used irqs are configured properly in the board
152 static void au1000_enable_mac(struct net_device *dev, int force_reset)
155 struct au1000_private *aup = netdev_priv(dev);
157 spin_lock_irqsave(&aup->lock, flags);
159 if(force_reset || (!aup->mac_enabled)) {
160 *aup->enable = MAC_EN_CLOCK_ENABLE;
162 *aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2
163 | MAC_EN_CLOCK_ENABLE);
166 aup->mac_enabled = 1;
169 spin_unlock_irqrestore(&aup->lock, flags);
175 static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg)
177 struct au1000_private *aup = netdev_priv(dev);
178 volatile u32 *const mii_control_reg = &aup->mac->mii_control;
179 volatile u32 *const mii_data_reg = &aup->mac->mii_data;
183 while (*mii_control_reg & MAC_MII_BUSY) {
185 if (--timedout == 0) {
186 printk(KERN_ERR "%s: read_MII busy timeout!!\n",
192 mii_control = MAC_SET_MII_SELECT_REG(reg) |
193 MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ;
195 *mii_control_reg = mii_control;
198 while (*mii_control_reg & MAC_MII_BUSY) {
200 if (--timedout == 0) {
201 printk(KERN_ERR "%s: mdio_read busy timeout!!\n",
206 return (int)*mii_data_reg;
209 static void au1000_mdio_write(struct net_device *dev, int phy_addr,
212 struct au1000_private *aup = netdev_priv(dev);
213 volatile u32 *const mii_control_reg = &aup->mac->mii_control;
214 volatile u32 *const mii_data_reg = &aup->mac->mii_data;
218 while (*mii_control_reg & MAC_MII_BUSY) {
220 if (--timedout == 0) {
221 printk(KERN_ERR "%s: mdio_write busy timeout!!\n",
227 mii_control = MAC_SET_MII_SELECT_REG(reg) |
228 MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE;
230 *mii_data_reg = value;
231 *mii_control_reg = mii_control;
234 static int au1000_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
236 /* WARNING: bus->phy_map[phy_addr].attached_dev == dev does
237 * _NOT_ hold (e.g. when PHY is accessed through other MAC's MII bus) */
238 struct net_device *const dev = bus->priv;
240 au1000_enable_mac(dev, 0); /* make sure the MAC associated with this
241 * mii_bus is enabled */
242 return au1000_mdio_read(dev, phy_addr, regnum);
245 static int au1000_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
248 struct net_device *const dev = bus->priv;
250 au1000_enable_mac(dev, 0); /* make sure the MAC associated with this
251 * mii_bus is enabled */
252 au1000_mdio_write(dev, phy_addr, regnum, value);
256 static int au1000_mdiobus_reset(struct mii_bus *bus)
258 struct net_device *const dev = bus->priv;
260 au1000_enable_mac(dev, 0); /* make sure the MAC associated with this
261 * mii_bus is enabled */
265 static void au1000_hard_stop(struct net_device *dev)
267 struct au1000_private *aup = netdev_priv(dev);
269 if (au1000_debug > 4)
270 printk(KERN_INFO "%s: hard stop\n", dev->name);
272 aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE);
276 static void au1000_enable_rx_tx(struct net_device *dev)
278 struct au1000_private *aup = netdev_priv(dev);
280 if (au1000_debug > 4)
281 printk(KERN_INFO "%s: enable_rx_tx\n", dev->name);
283 aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE);
288 au1000_adjust_link(struct net_device *dev)
290 struct au1000_private *aup = netdev_priv(dev);
291 struct phy_device *phydev = aup->phy_dev;
294 int status_change = 0;
296 BUG_ON(!aup->phy_dev);
298 spin_lock_irqsave(&aup->lock, flags);
300 if (phydev->link && (aup->old_speed != phydev->speed)) {
303 switch(phydev->speed) {
309 "%s: Speed (%d) is not 10/100 ???\n",
310 dev->name, phydev->speed);
314 aup->old_speed = phydev->speed;
319 if (phydev->link && (aup->old_duplex != phydev->duplex)) {
320 // duplex mode changed
322 /* switching duplex mode requires to disable rx and tx! */
323 au1000_hard_stop(dev);
325 if (DUPLEX_FULL == phydev->duplex)
326 aup->mac->control = ((aup->mac->control
328 & ~MAC_DISABLE_RX_OWN);
330 aup->mac->control = ((aup->mac->control
332 | MAC_DISABLE_RX_OWN);
335 au1000_enable_rx_tx(dev);
336 aup->old_duplex = phydev->duplex;
341 if(phydev->link != aup->old_link) {
342 // link state changed
347 aup->old_duplex = -1;
350 aup->old_link = phydev->link;
354 spin_unlock_irqrestore(&aup->lock, flags);
358 printk(KERN_INFO "%s: link up (%d/%s)\n",
359 dev->name, phydev->speed,
360 DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
362 printk(KERN_INFO "%s: link down\n", dev->name);
366 static int au1000_mii_probe (struct net_device *dev)
368 struct au1000_private *const aup = netdev_priv(dev);
369 struct phy_device *phydev = NULL;
371 if (aup->phy_static_config) {
372 BUG_ON(aup->mac_id < 0 || aup->mac_id > 1);
375 phydev = aup->mii_bus->phy_map[aup->phy_addr];
377 printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
383 /* find the first (lowest address) PHY on the current MAC's MII bus */
384 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++)
385 if (aup->mii_bus->phy_map[phy_addr]) {
386 phydev = aup->mii_bus->phy_map[phy_addr];
387 if (!aup->phy_search_highest_addr)
388 break; /* break out with first one found */
391 if (aup->phy1_search_mac0) {
392 /* try harder to find a PHY */
393 if (!phydev && (aup->mac_id == 1)) {
394 /* no PHY found, maybe we have a dual PHY? */
395 printk (KERN_INFO DRV_NAME ": no PHY found on MAC1, "
396 "let's see if it's attached to MAC0...\n");
398 /* find the first (lowest address) non-attached PHY on
399 * the MAC0 MII bus */
400 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
401 struct phy_device *const tmp_phydev =
402 aup->mii_bus->phy_map[phy_addr];
404 if (aup->mac_id == 1)
408 continue; /* no PHY here... */
410 if (tmp_phydev->attached_dev)
411 continue; /* already claimed by MAC0 */
414 break; /* found it */
421 printk (KERN_ERR DRV_NAME ":%s: no PHY found\n", dev->name);
425 /* now we are supposed to have a proper phydev, to attach to... */
426 BUG_ON(phydev->attached_dev);
428 phydev = phy_connect(dev, dev_name(&phydev->dev), &au1000_adjust_link,
429 0, PHY_INTERFACE_MODE_MII);
431 if (IS_ERR(phydev)) {
432 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
433 return PTR_ERR(phydev);
436 /* mask with MAC supported features */
437 phydev->supported &= (SUPPORTED_10baseT_Half
438 | SUPPORTED_10baseT_Full
439 | SUPPORTED_100baseT_Half
440 | SUPPORTED_100baseT_Full
442 /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
446 phydev->advertising = phydev->supported;
450 aup->old_duplex = -1;
451 aup->phy_dev = phydev;
453 printk(KERN_INFO "%s: attached PHY driver [%s] "
454 "(mii_bus:phy_addr=%s, irq=%d)\n", dev->name,
455 phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
462 * Buffer allocation/deallocation routines. The buffer descriptor returned
463 * has the virtual and dma address of a buffer suitable for
464 * both, receive and transmit operations.
466 static db_dest_t *au1000_GetFreeDB(struct au1000_private *aup)
472 aup->pDBfree = pDB->pnext;
477 void au1000_ReleaseDB(struct au1000_private *aup, db_dest_t *pDB)
479 db_dest_t *pDBfree = aup->pDBfree;
481 pDBfree->pnext = pDB;
485 static void au1000_reset_mac_unlocked(struct net_device *dev)
487 struct au1000_private *const aup = netdev_priv(dev);
490 au1000_hard_stop(dev);
492 *aup->enable = MAC_EN_CLOCK_ENABLE;
498 for (i = 0; i < NUM_RX_DMA; i++) {
499 /* reset control bits */
500 aup->rx_dma_ring[i]->buff_stat &= ~0xf;
502 for (i = 0; i < NUM_TX_DMA; i++) {
503 /* reset control bits */
504 aup->tx_dma_ring[i]->buff_stat &= ~0xf;
507 aup->mac_enabled = 0;
511 static void au1000_reset_mac(struct net_device *dev)
513 struct au1000_private *const aup = netdev_priv(dev);
516 if (au1000_debug > 4)
517 printk(KERN_INFO "%s: reset mac, aup %x\n",
518 dev->name, (unsigned)aup);
520 spin_lock_irqsave(&aup->lock, flags);
522 au1000_reset_mac_unlocked (dev);
524 spin_unlock_irqrestore(&aup->lock, flags);
528 * Setup the receive and transmit "rings". These pointers are the addresses
529 * of the rx and tx MAC DMA registers so they are fixed by the hardware --
530 * these are not descriptors sitting in memory.
533 au1000_setup_hw_rings(struct au1000_private *aup, u32 rx_base, u32 tx_base)
537 for (i = 0; i < NUM_RX_DMA; i++) {
538 aup->rx_dma_ring[i] =
539 (volatile rx_dma_t *) (rx_base + sizeof(rx_dma_t)*i);
541 for (i = 0; i < NUM_TX_DMA; i++) {
542 aup->tx_dma_ring[i] =
543 (volatile tx_dma_t *) (tx_base + sizeof(tx_dma_t)*i);
551 static int au1000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
553 struct au1000_private *aup = netdev_priv(dev);
556 return phy_ethtool_gset(aup->phy_dev, cmd);
561 static int au1000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
563 struct au1000_private *aup = netdev_priv(dev);
565 if (!capable(CAP_NET_ADMIN))
569 return phy_ethtool_sset(aup->phy_dev, cmd);
575 au1000_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
577 struct au1000_private *aup = netdev_priv(dev);
579 strcpy(info->driver, DRV_NAME);
580 strcpy(info->version, DRV_VERSION);
581 info->fw_version[0] = '\0';
582 sprintf(info->bus_info, "%s %d", DRV_NAME, aup->mac_id);
583 info->regdump_len = 0;
586 static const struct ethtool_ops au1000_ethtool_ops = {
587 .get_settings = au1000_get_settings,
588 .set_settings = au1000_set_settings,
589 .get_drvinfo = au1000_get_drvinfo,
590 .get_link = ethtool_op_get_link,
595 * Initialize the interface.
597 * When the device powers up, the clocks are disabled and the
598 * mac is in reset state. When the interface is closed, we
599 * do the same -- reset the device and disable the clocks to
600 * conserve power. Thus, whenever au1000_init() is called,
601 * the device should already be in reset state.
603 static int au1000_init(struct net_device *dev)
605 struct au1000_private *aup = netdev_priv(dev);
610 if (au1000_debug > 4)
611 printk("%s: au1000_init\n", dev->name);
613 /* bring the device out of reset */
614 au1000_enable_mac(dev, 1);
616 spin_lock_irqsave(&aup->lock, flags);
618 aup->mac->control = 0;
619 aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2;
620 aup->tx_tail = aup->tx_head;
621 aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2;
623 aup->mac->mac_addr_high = dev->dev_addr[5]<<8 | dev->dev_addr[4];
624 aup->mac->mac_addr_low = dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 |
625 dev->dev_addr[1]<<8 | dev->dev_addr[0];
627 for (i = 0; i < NUM_RX_DMA; i++) {
628 aup->rx_dma_ring[i]->buff_stat |= RX_DMA_ENABLE;
632 control = MAC_RX_ENABLE | MAC_TX_ENABLE;
633 #ifndef CONFIG_CPU_LITTLE_ENDIAN
634 control |= MAC_BIG_ENDIAN;
637 if (aup->phy_dev->link && (DUPLEX_FULL == aup->phy_dev->duplex))
638 control |= MAC_FULL_DUPLEX;
640 control |= MAC_DISABLE_RX_OWN;
641 } else { /* PHY-less op, assume full-duplex */
642 control |= MAC_FULL_DUPLEX;
645 aup->mac->control = control;
646 aup->mac->vlan1_tag = 0x8100; /* activate vlan support */
649 spin_unlock_irqrestore(&aup->lock, flags);
653 static inline void au1000_update_rx_stats(struct net_device *dev, u32 status)
655 struct net_device_stats *ps = &dev->stats;
658 if (status & RX_MCAST_FRAME)
661 if (status & RX_ERROR) {
663 if (status & RX_MISSED_FRAME)
664 ps->rx_missed_errors++;
665 if (status & (RX_OVERLEN | RX_RUNT | RX_LEN_ERROR))
666 ps->rx_length_errors++;
667 if (status & RX_CRC_ERROR)
669 if (status & RX_COLL)
673 ps->rx_bytes += status & RX_FRAME_LEN_MASK;
678 * Au1000 receive routine.
680 static int au1000_rx(struct net_device *dev)
682 struct au1000_private *aup = netdev_priv(dev);
684 volatile rx_dma_t *prxd;
685 u32 buff_stat, status;
689 if (au1000_debug > 5)
690 printk("%s: au1000_rx head %d\n", dev->name, aup->rx_head);
692 prxd = aup->rx_dma_ring[aup->rx_head];
693 buff_stat = prxd->buff_stat;
694 while (buff_stat & RX_T_DONE) {
695 status = prxd->status;
696 pDB = aup->rx_db_inuse[aup->rx_head];
697 au1000_update_rx_stats(dev, status);
698 if (!(status & RX_ERROR)) {
701 frmlen = (status & RX_FRAME_LEN_MASK);
702 frmlen -= 4; /* Remove FCS */
703 skb = dev_alloc_skb(frmlen + 2);
706 "%s: Memory squeeze, dropping packet.\n",
708 dev->stats.rx_dropped++;
711 skb_reserve(skb, 2); /* 16 byte IP header align */
712 skb_copy_to_linear_data(skb,
713 (unsigned char *)pDB->vaddr, frmlen);
714 skb_put(skb, frmlen);
715 skb->protocol = eth_type_trans(skb, dev);
716 netif_rx(skb); /* pass the packet to upper layers */
719 if (au1000_debug > 4) {
720 if (status & RX_MISSED_FRAME)
722 if (status & RX_WDOG_TIMER)
724 if (status & RX_RUNT)
726 if (status & RX_OVERLEN)
727 printk("rx overlen\n");
728 if (status & RX_COLL)
730 if (status & RX_MII_ERROR)
731 printk("rx mii error\n");
732 if (status & RX_CRC_ERROR)
733 printk("rx crc error\n");
734 if (status & RX_LEN_ERROR)
735 printk("rx len error\n");
736 if (status & RX_U_CNTRL_FRAME)
737 printk("rx u control frame\n");
740 prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE);
741 aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1);
744 /* next descriptor */
745 prxd = aup->rx_dma_ring[aup->rx_head];
746 buff_stat = prxd->buff_stat;
751 static void au1000_update_tx_stats(struct net_device *dev, u32 status)
753 struct au1000_private *aup = netdev_priv(dev);
754 struct net_device_stats *ps = &dev->stats;
756 if (status & TX_FRAME_ABORTED) {
757 if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) {
758 if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) {
759 /* any other tx errors are only valid
760 * in half duplex mode */
762 ps->tx_aborted_errors++;
767 ps->tx_aborted_errors++;
768 if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER))
769 ps->tx_carrier_errors++;
775 * Called from the interrupt service routine to acknowledge
776 * the TX DONE bits. This is a must if the irq is setup as
779 static void au1000_tx_ack(struct net_device *dev)
781 struct au1000_private *aup = netdev_priv(dev);
782 volatile tx_dma_t *ptxd;
784 ptxd = aup->tx_dma_ring[aup->tx_tail];
786 while (ptxd->buff_stat & TX_T_DONE) {
787 au1000_update_tx_stats(dev, ptxd->status);
788 ptxd->buff_stat &= ~TX_T_DONE;
792 aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1);
793 ptxd = aup->tx_dma_ring[aup->tx_tail];
797 netif_wake_queue(dev);
803 * Au1000 interrupt service routine.
805 static irqreturn_t au1000_interrupt(int irq, void *dev_id)
807 struct net_device *dev = dev_id;
809 /* Handle RX interrupts first to minimize chance of overrun */
813 return IRQ_RETVAL(1);
816 static int au1000_open(struct net_device *dev)
819 struct au1000_private *aup = netdev_priv(dev);
821 if (au1000_debug > 4)
822 printk("%s: open: dev=%p\n", dev->name, dev);
824 if ((retval = request_irq(dev->irq, au1000_interrupt, 0,
826 printk(KERN_ERR "%s: unable to get IRQ %d\n",
827 dev->name, dev->irq);
831 if ((retval = au1000_init(dev))) {
832 printk(KERN_ERR "%s: error in au1000_init\n", dev->name);
833 free_irq(dev->irq, dev);
838 /* cause the PHY state machine to schedule a link state check */
839 aup->phy_dev->state = PHY_CHANGELINK;
840 phy_start(aup->phy_dev);
843 netif_start_queue(dev);
845 if (au1000_debug > 4)
846 printk("%s: open: Initialization done.\n", dev->name);
851 static int au1000_close(struct net_device *dev)
854 struct au1000_private *const aup = netdev_priv(dev);
856 if (au1000_debug > 4)
857 printk("%s: close: dev=%p\n", dev->name, dev);
860 phy_stop(aup->phy_dev);
862 spin_lock_irqsave(&aup->lock, flags);
864 au1000_reset_mac_unlocked (dev);
866 /* stop the device */
867 netif_stop_queue(dev);
869 /* disable the interrupt */
870 free_irq(dev->irq, dev);
871 spin_unlock_irqrestore(&aup->lock, flags);
877 * Au1000 transmit routine.
879 static netdev_tx_t au1000_tx(struct sk_buff *skb, struct net_device *dev)
881 struct au1000_private *aup = netdev_priv(dev);
882 struct net_device_stats *ps = &dev->stats;
883 volatile tx_dma_t *ptxd;
888 if (au1000_debug > 5)
889 printk("%s: tx: aup %x len=%d, data=%p, head %d\n",
890 dev->name, (unsigned)aup, skb->len,
891 skb->data, aup->tx_head);
893 ptxd = aup->tx_dma_ring[aup->tx_head];
894 buff_stat = ptxd->buff_stat;
895 if (buff_stat & TX_DMA_ENABLE) {
896 /* We've wrapped around and the transmitter is still busy */
897 netif_stop_queue(dev);
899 return NETDEV_TX_BUSY;
901 else if (buff_stat & TX_T_DONE) {
902 au1000_update_tx_stats(dev, ptxd->status);
908 netif_wake_queue(dev);
911 pDB = aup->tx_db_inuse[aup->tx_head];
912 skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len);
913 if (skb->len < ETH_ZLEN) {
914 for (i=skb->len; i<ETH_ZLEN; i++) {
915 ((char *)pDB->vaddr)[i] = 0;
917 ptxd->len = ETH_ZLEN;
920 ptxd->len = skb->len;
923 ps->tx_bytes += ptxd->len;
925 ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE;
928 aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1);
929 dev->trans_start = jiffies;
934 * The Tx ring has been full longer than the watchdog timeout
935 * value. The transmitter must be hung?
937 static void au1000_tx_timeout(struct net_device *dev)
939 printk(KERN_ERR "%s: au1000_tx_timeout: dev=%p\n", dev->name, dev);
940 au1000_reset_mac(dev);
942 dev->trans_start = jiffies;
943 netif_wake_queue(dev);
946 static void au1000_multicast_list(struct net_device *dev)
948 struct au1000_private *aup = netdev_priv(dev);
950 if (au1000_debug > 4)
951 printk("%s: au1000_multicast_list: flags=%x\n", dev->name, dev->flags);
953 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
954 aup->mac->control |= MAC_PROMISCUOUS;
955 } else if ((dev->flags & IFF_ALLMULTI) ||
956 netdev_mc_count(dev) > MULTICAST_FILTER_LIMIT) {
957 aup->mac->control |= MAC_PASS_ALL_MULTI;
958 aup->mac->control &= ~MAC_PROMISCUOUS;
959 printk(KERN_INFO "%s: Pass all multicast\n", dev->name);
961 struct netdev_hw_addr *ha;
962 u32 mc_filter[2]; /* Multicast hash filter */
964 mc_filter[1] = mc_filter[0] = 0;
965 netdev_for_each_mc_addr(ha, dev)
966 set_bit(ether_crc(ETH_ALEN, ha->addr)>>26,
968 aup->mac->multi_hash_high = mc_filter[1];
969 aup->mac->multi_hash_low = mc_filter[0];
970 aup->mac->control &= ~MAC_PROMISCUOUS;
971 aup->mac->control |= MAC_HASH_MODE;
975 static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
977 struct au1000_private *aup = netdev_priv(dev);
979 if (!netif_running(dev)) return -EINVAL;
981 if (!aup->phy_dev) return -EINVAL; // PHY not controllable
983 return phy_mii_ioctl(aup->phy_dev, if_mii(rq), cmd);
986 static const struct net_device_ops au1000_netdev_ops = {
987 .ndo_open = au1000_open,
988 .ndo_stop = au1000_close,
989 .ndo_start_xmit = au1000_tx,
990 .ndo_set_multicast_list = au1000_multicast_list,
991 .ndo_do_ioctl = au1000_ioctl,
992 .ndo_tx_timeout = au1000_tx_timeout,
993 .ndo_set_mac_address = eth_mac_addr,
994 .ndo_validate_addr = eth_validate_addr,
995 .ndo_change_mtu = eth_change_mtu,
998 static int __devinit au1000_probe(struct platform_device *pdev)
1000 static unsigned version_printed = 0;
1001 struct au1000_private *aup = NULL;
1002 struct au1000_eth_platform_data *pd;
1003 struct net_device *dev = NULL;
1004 db_dest_t *pDB, *pDBfree;
1005 int irq, i, err = 0;
1006 struct resource *base, *macen;
1009 base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1011 printk(KERN_ERR DRV_NAME ": failed to retrieve base register\n");
1016 macen = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1018 printk(KERN_ERR DRV_NAME ": failed to retrieve MAC Enable register\n");
1023 irq = platform_get_irq(pdev, 0);
1025 printk(KERN_ERR DRV_NAME ": failed to retrieve IRQ\n");
1030 if (!request_mem_region(base->start, resource_size(base), pdev->name)) {
1031 printk(KERN_ERR DRV_NAME ": failed to request memory region for base registers\n");
1036 if (!request_mem_region(macen->start, resource_size(macen), pdev->name)) {
1037 printk(KERN_ERR DRV_NAME ": failed to request memory region for MAC enable register\n");
1042 dev = alloc_etherdev(sizeof(struct au1000_private));
1044 printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME);
1049 SET_NETDEV_DEV(dev, &pdev->dev);
1050 platform_set_drvdata(pdev, dev);
1051 aup = netdev_priv(dev);
1053 spin_lock_init(&aup->lock);
1055 /* Allocate the data buffers */
1056 /* Snooping works fine with eth on all au1xxx */
1057 aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE *
1058 (NUM_TX_BUFFS + NUM_RX_BUFFS),
1061 printk(KERN_ERR DRV_NAME ": failed to allocate data buffers\n");
1066 /* aup->mac is the base address of the MAC's registers */
1067 aup->mac = (volatile mac_reg_t *)ioremap_nocache(base->start, resource_size(base));
1069 printk(KERN_ERR DRV_NAME ": failed to ioremap MAC registers\n");
1074 /* Setup some variables for quick register address access */
1075 aup->enable = (volatile u32 *)ioremap_nocache(macen->start, resource_size(macen));
1077 printk(KERN_ERR DRV_NAME ": failed to ioremap MAC enable register\n");
1081 aup->mac_id = pdev->id;
1083 if (pdev->id == 0) {
1084 if (prom_get_ethernet_addr(ethaddr) == 0)
1085 memcpy(au1000_mac_addr, ethaddr, sizeof(au1000_mac_addr));
1087 printk(KERN_INFO "%s: No MAC address found\n",
1089 /* Use the hard coded MAC addresses */
1092 au1000_setup_hw_rings(aup, MAC0_RX_DMA_ADDR, MAC0_TX_DMA_ADDR);
1093 } else if (pdev->id == 1)
1094 au1000_setup_hw_rings(aup, MAC1_RX_DMA_ADDR, MAC1_TX_DMA_ADDR);
1097 * Assign to the Ethernet ports two consecutive MAC addresses
1098 * to match those that are printed on their stickers
1100 memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr));
1101 dev->dev_addr[5] += pdev->id;
1104 aup->mac_enabled = 0;
1106 pd = pdev->dev.platform_data;
1108 printk(KERN_INFO DRV_NAME ": no platform_data passed, PHY search on MAC0\n");
1109 aup->phy1_search_mac0 = 1;
1111 aup->phy_static_config = pd->phy_static_config;
1112 aup->phy_search_highest_addr = pd->phy_search_highest_addr;
1113 aup->phy1_search_mac0 = pd->phy1_search_mac0;
1114 aup->phy_addr = pd->phy_addr;
1115 aup->phy_busid = pd->phy_busid;
1116 aup->phy_irq = pd->phy_irq;
1119 if (aup->phy_busid && aup->phy_busid > 0) {
1120 printk(KERN_ERR DRV_NAME ": MAC0-associated PHY attached 2nd MACs MII"
1121 "bus not supported yet\n");
1123 goto err_mdiobus_alloc;
1126 aup->mii_bus = mdiobus_alloc();
1127 if (aup->mii_bus == NULL) {
1128 printk(KERN_ERR DRV_NAME ": failed to allocate mdiobus structure\n");
1130 goto err_mdiobus_alloc;
1133 aup->mii_bus->priv = dev;
1134 aup->mii_bus->read = au1000_mdiobus_read;
1135 aup->mii_bus->write = au1000_mdiobus_write;
1136 aup->mii_bus->reset = au1000_mdiobus_reset;
1137 aup->mii_bus->name = "au1000_eth_mii";
1138 snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id);
1139 aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
1140 if (aup->mii_bus->irq == NULL)
1143 for(i = 0; i < PHY_MAX_ADDR; ++i)
1144 aup->mii_bus->irq[i] = PHY_POLL;
1145 /* if known, set corresponding PHY IRQs */
1146 if (aup->phy_static_config)
1147 if (aup->phy_irq && aup->phy_busid == aup->mac_id)
1148 aup->mii_bus->irq[aup->phy_addr] = aup->phy_irq;
1150 err = mdiobus_register(aup->mii_bus);
1152 printk(KERN_ERR DRV_NAME " failed to register MDIO bus\n");
1153 goto err_mdiobus_reg;
1156 if (au1000_mii_probe(dev) != 0)
1160 /* setup the data buffer descriptors and attach a buffer to each one */
1162 for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) {
1163 pDB->pnext = pDBfree;
1165 pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i);
1166 pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
1169 aup->pDBfree = pDBfree;
1171 for (i = 0; i < NUM_RX_DMA; i++) {
1172 pDB = au1000_GetFreeDB(aup);
1176 aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
1177 aup->rx_db_inuse[i] = pDB;
1179 for (i = 0; i < NUM_TX_DMA; i++) {
1180 pDB = au1000_GetFreeDB(aup);
1184 aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
1185 aup->tx_dma_ring[i]->len = 0;
1186 aup->tx_db_inuse[i] = pDB;
1189 dev->base_addr = base->start;
1191 dev->netdev_ops = &au1000_netdev_ops;
1192 SET_ETHTOOL_OPS(dev, &au1000_ethtool_ops);
1193 dev->watchdog_timeo = ETH_TX_TIMEOUT;
1196 * The boot code uses the ethernet controller, so reset it to start
1197 * fresh. au1000_init() expects that the device is in reset state.
1199 au1000_reset_mac(dev);
1201 err = register_netdev(dev);
1203 printk(KERN_ERR DRV_NAME "%s: Cannot register net device, aborting.\n",
1208 printk("%s: Au1xx0 Ethernet found at 0x%lx, irq %d\n",
1209 dev->name, (unsigned long)base->start, irq);
1210 if (version_printed++ == 0)
1211 printk("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR);
1216 if (aup->mii_bus != NULL)
1217 mdiobus_unregister(aup->mii_bus);
1219 /* here we should have a valid dev plus aup-> register addresses
1220 * so we can reset the mac properly.*/
1221 au1000_reset_mac(dev);
1223 for (i = 0; i < NUM_RX_DMA; i++) {
1224 if (aup->rx_db_inuse[i])
1225 au1000_ReleaseDB(aup, aup->rx_db_inuse[i]);
1227 for (i = 0; i < NUM_TX_DMA; i++) {
1228 if (aup->tx_db_inuse[i])
1229 au1000_ReleaseDB(aup, aup->tx_db_inuse[i]);
1232 mdiobus_free(aup->mii_bus);
1234 iounmap(aup->enable);
1238 dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
1239 (void *)aup->vaddr, aup->dma_addr);
1243 release_mem_region(macen->start, resource_size(macen));
1245 release_mem_region(base->start, resource_size(base));
1250 static int __devexit au1000_remove(struct platform_device *pdev)
1252 struct net_device *dev = platform_get_drvdata(pdev);
1253 struct au1000_private *aup = netdev_priv(dev);
1255 struct resource *base, *macen;
1257 platform_set_drvdata(pdev, NULL);
1259 unregister_netdev(dev);
1260 mdiobus_unregister(aup->mii_bus);
1261 mdiobus_free(aup->mii_bus);
1263 for (i = 0; i < NUM_RX_DMA; i++)
1264 if (aup->rx_db_inuse[i])
1265 au1000_ReleaseDB(aup, aup->rx_db_inuse[i]);
1267 for (i = 0; i < NUM_TX_DMA; i++)
1268 if (aup->tx_db_inuse[i])
1269 au1000_ReleaseDB(aup, aup->tx_db_inuse[i]);
1271 dma_free_noncoherent(NULL, MAX_BUF_SIZE *
1272 (NUM_TX_BUFFS + NUM_RX_BUFFS),
1273 (void *)aup->vaddr, aup->dma_addr);
1276 iounmap(aup->enable);
1278 base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1279 release_mem_region(base->start, resource_size(base));
1281 macen = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1282 release_mem_region(macen->start, resource_size(macen));
1289 static struct platform_driver au1000_eth_driver = {
1290 .probe = au1000_probe,
1291 .remove = __devexit_p(au1000_remove),
1293 .name = "au1000-eth",
1294 .owner = THIS_MODULE,
1297 MODULE_ALIAS("platform:au1000-eth");
1300 static int __init au1000_init_module(void)
1302 return platform_driver_register(&au1000_eth_driver);
1305 static void __exit au1000_exit_module(void)
1307 platform_driver_unregister(&au1000_eth_driver);
1310 module_init(au1000_init_module);
1311 module_exit(au1000_exit_module);