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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39 #include <linux/capability.h>
40 #include <linux/dma-mapping.h>
41 #include <linux/module.h>
42 #include <linux/kernel.h>
43 #include <linux/string.h>
44 #include <linux/timer.h>
45 #include <linux/errno.h>
47 #include <linux/ioport.h>
48 #include <linux/bitops.h>
49 #include <linux/slab.h>
50 #include <linux/interrupt.h>
51 #include <linux/init.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/ethtool.h>
55 #include <linux/mii.h>
56 #include <linux/skbuff.h>
57 #include <linux/delay.h>
58 #include <linux/crc32.h>
59 #include <linux/phy.h>
60 #include <linux/platform_device.h>
61 #include <linux/cpu.h>
64 #include <asm/mipsregs.h>
66 #include <asm/processor.h>
69 #include <au1xxx_eth.h>
72 #include "au1000_eth.h"
74 #ifdef AU1000_ETH_DEBUG
75 static int au1000_debug
= 5;
77 static int au1000_debug
= 3;
80 #define AU1000_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
84 #define DRV_NAME "au1000_eth"
85 #define DRV_VERSION "1.7"
86 #define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>"
87 #define DRV_DESC "Au1xxx on-chip Ethernet driver"
89 MODULE_AUTHOR(DRV_AUTHOR
);
90 MODULE_DESCRIPTION(DRV_DESC
);
91 MODULE_LICENSE("GPL");
92 MODULE_VERSION(DRV_VERSION
);
97 * The Au1000 MACs use a simple rx and tx descriptor ring scheme.
98 * There are four receive and four transmit descriptors. These
99 * descriptors are not in memory; rather, they are just a set of
100 * hardware registers.
102 * Since the Au1000 has a coherent data cache, the receive and
103 * transmit buffers are allocated from the KSEG0 segment. The
104 * hardware registers, however, are still mapped at KSEG1 to
105 * make sure there's no out-of-order writes, and that all writes
106 * complete immediately.
110 * board-specific configurations
112 * PHY detection algorithm
114 * If phy_static_config is undefined, the PHY setup is
117 * mii_probe() first searches the current MAC's MII bus for a PHY,
118 * selecting the first (or last, if phy_search_highest_addr is
119 * defined) PHY address not already claimed by another netdev.
121 * If nothing was found that way when searching for the 2nd ethernet
122 * controller's PHY and phy1_search_mac0 is defined, then
123 * the first MII bus is searched as well for an unclaimed PHY; this is
124 * needed in case of a dual-PHY accessible only through the MAC0's MII
127 * Finally, if no PHY is found, then the corresponding ethernet
128 * controller is not registered to the network subsystem.
131 /* autodetection defaults: phy1_search_mac0 */
135 * most boards PHY setup should be detectable properly with the
136 * autodetection algorithm in mii_probe(), but in some cases (e.g. if
137 * you have a switch attached, or want to use the PHY's interrupt
138 * notification capabilities) you can provide a static PHY
141 * IRQs may only be set, if a PHY address was configured
142 * If a PHY address is given, also a bus id is required to be set
144 * ps: make sure the used irqs are configured properly in the board
148 static void au1000_enable_mac(struct net_device
*dev
, int force_reset
)
151 struct au1000_private
*aup
= netdev_priv(dev
);
153 spin_lock_irqsave(&aup
->lock
, flags
);
155 if (force_reset
|| (!aup
->mac_enabled
)) {
156 writel(MAC_EN_CLOCK_ENABLE
, aup
->enable
);
158 writel((MAC_EN_RESET0
| MAC_EN_RESET1
| MAC_EN_RESET2
159 | MAC_EN_CLOCK_ENABLE
), aup
->enable
);
162 aup
->mac_enabled
= 1;
165 spin_unlock_irqrestore(&aup
->lock
, flags
);
171 static int au1000_mdio_read(struct net_device
*dev
, int phy_addr
, int reg
)
173 struct au1000_private
*aup
= netdev_priv(dev
);
174 u32
*const mii_control_reg
= &aup
->mac
->mii_control
;
175 u32
*const mii_data_reg
= &aup
->mac
->mii_data
;
179 while (readl(mii_control_reg
) & MAC_MII_BUSY
) {
181 if (--timedout
== 0) {
182 netdev_err(dev
, "read_MII busy timeout!!\n");
187 mii_control
= MAC_SET_MII_SELECT_REG(reg
) |
188 MAC_SET_MII_SELECT_PHY(phy_addr
) | MAC_MII_READ
;
190 writel(mii_control
, mii_control_reg
);
193 while (readl(mii_control_reg
) & MAC_MII_BUSY
) {
195 if (--timedout
== 0) {
196 netdev_err(dev
, "mdio_read busy timeout!!\n");
200 return readl(mii_data_reg
);
203 static void au1000_mdio_write(struct net_device
*dev
, int phy_addr
,
206 struct au1000_private
*aup
= netdev_priv(dev
);
207 u32
*const mii_control_reg
= &aup
->mac
->mii_control
;
208 u32
*const mii_data_reg
= &aup
->mac
->mii_data
;
212 while (readl(mii_control_reg
) & MAC_MII_BUSY
) {
214 if (--timedout
== 0) {
215 netdev_err(dev
, "mdio_write busy timeout!!\n");
220 mii_control
= MAC_SET_MII_SELECT_REG(reg
) |
221 MAC_SET_MII_SELECT_PHY(phy_addr
) | MAC_MII_WRITE
;
223 writel(value
, mii_data_reg
);
224 writel(mii_control
, mii_control_reg
);
227 static int au1000_mdiobus_read(struct mii_bus
*bus
, int phy_addr
, int regnum
)
229 /* WARNING: bus->phy_map[phy_addr].attached_dev == dev does
230 * _NOT_ hold (e.g. when PHY is accessed through other MAC's MII bus)
232 struct net_device
*const dev
= bus
->priv
;
234 /* make sure the MAC associated with this
237 au1000_enable_mac(dev
, 0);
239 return au1000_mdio_read(dev
, phy_addr
, regnum
);
242 static int au1000_mdiobus_write(struct mii_bus
*bus
, int phy_addr
, int regnum
,
245 struct net_device
*const dev
= bus
->priv
;
247 /* make sure the MAC associated with this
250 au1000_enable_mac(dev
, 0);
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 /* make sure the MAC associated with this
263 au1000_enable_mac(dev
, 0);
268 static void au1000_hard_stop(struct net_device
*dev
)
270 struct au1000_private
*aup
= netdev_priv(dev
);
273 netif_dbg(aup
, drv
, dev
, "hard stop\n");
275 reg
= readl(&aup
->mac
->control
);
276 reg
&= ~(MAC_RX_ENABLE
| MAC_TX_ENABLE
);
277 writel(reg
, &aup
->mac
->control
);
281 static void au1000_enable_rx_tx(struct net_device
*dev
)
283 struct au1000_private
*aup
= netdev_priv(dev
);
286 netif_dbg(aup
, hw
, dev
, "enable_rx_tx\n");
288 reg
= readl(&aup
->mac
->control
);
289 reg
|= (MAC_RX_ENABLE
| MAC_TX_ENABLE
);
290 writel(reg
, &aup
->mac
->control
);
295 au1000_adjust_link(struct net_device
*dev
)
297 struct au1000_private
*aup
= netdev_priv(dev
);
298 struct phy_device
*phydev
= aup
->phy_dev
;
302 int status_change
= 0;
304 BUG_ON(!aup
->phy_dev
);
306 spin_lock_irqsave(&aup
->lock
, flags
);
308 if (phydev
->link
&& (aup
->old_speed
!= phydev
->speed
)) {
311 switch (phydev
->speed
) {
316 netdev_warn(dev
, "Speed (%d) is not 10/100 ???\n",
321 aup
->old_speed
= phydev
->speed
;
326 if (phydev
->link
&& (aup
->old_duplex
!= phydev
->duplex
)) {
327 /* duplex mode changed */
329 /* switching duplex mode requires to disable rx and tx! */
330 au1000_hard_stop(dev
);
332 reg
= readl(&aup
->mac
->control
);
333 if (DUPLEX_FULL
== phydev
->duplex
) {
334 reg
|= MAC_FULL_DUPLEX
;
335 reg
&= ~MAC_DISABLE_RX_OWN
;
337 reg
&= ~MAC_FULL_DUPLEX
;
338 reg
|= MAC_DISABLE_RX_OWN
;
340 writel(reg
, &aup
->mac
->control
);
343 au1000_enable_rx_tx(dev
);
344 aup
->old_duplex
= phydev
->duplex
;
349 if (phydev
->link
!= aup
->old_link
) {
350 /* link state changed */
355 aup
->old_duplex
= -1;
358 aup
->old_link
= phydev
->link
;
362 spin_unlock_irqrestore(&aup
->lock
, flags
);
366 netdev_info(dev
, "link up (%d/%s)\n",
368 DUPLEX_FULL
== phydev
->duplex
? "Full" : "Half");
370 netdev_info(dev
, "link down\n");
374 static int au1000_mii_probe(struct net_device
*dev
)
376 struct au1000_private
*const aup
= netdev_priv(dev
);
377 struct phy_device
*phydev
= NULL
;
380 if (aup
->phy_static_config
) {
381 BUG_ON(aup
->mac_id
< 0 || aup
->mac_id
> 1);
384 phydev
= aup
->mii_bus
->phy_map
[aup
->phy_addr
];
386 netdev_info(dev
, "using PHY-less setup\n");
390 /* find the first (lowest address) PHY
391 * on the current MAC's MII bus
393 for (phy_addr
= 0; phy_addr
< PHY_MAX_ADDR
; phy_addr
++)
394 if (aup
->mii_bus
->phy_map
[phy_addr
]) {
395 phydev
= aup
->mii_bus
->phy_map
[phy_addr
];
396 if (!aup
->phy_search_highest_addr
)
397 /* break out with first one found */
401 if (aup
->phy1_search_mac0
) {
402 /* try harder to find a PHY */
403 if (!phydev
&& (aup
->mac_id
== 1)) {
404 /* no PHY found, maybe we have a dual PHY? */
405 dev_info(&dev
->dev
, ": no PHY found on MAC1, "
406 "let's see if it's attached to MAC0...\n");
408 /* find the first (lowest address) non-attached
409 * PHY on the MAC0 MII bus
411 for (phy_addr
= 0; phy_addr
< PHY_MAX_ADDR
; phy_addr
++) {
412 struct phy_device
*const tmp_phydev
=
413 aup
->mii_bus
->phy_map
[phy_addr
];
415 if (aup
->mac_id
== 1)
422 /* already claimed by MAC0 */
423 if (tmp_phydev
->attached_dev
)
427 break; /* found it */
433 netdev_err(dev
, "no PHY found\n");
437 /* now we are supposed to have a proper phydev, to attach to... */
438 BUG_ON(phydev
->attached_dev
);
440 phydev
= phy_connect(dev
, dev_name(&phydev
->dev
), &au1000_adjust_link
,
441 0, PHY_INTERFACE_MODE_MII
);
443 if (IS_ERR(phydev
)) {
444 netdev_err(dev
, "Could not attach to PHY\n");
445 return PTR_ERR(phydev
);
448 /* mask with MAC supported features */
449 phydev
->supported
&= (SUPPORTED_10baseT_Half
450 | SUPPORTED_10baseT_Full
451 | SUPPORTED_100baseT_Half
452 | SUPPORTED_100baseT_Full
454 /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
458 phydev
->advertising
= phydev
->supported
;
462 aup
->old_duplex
= -1;
463 aup
->phy_dev
= phydev
;
465 netdev_info(dev
, "attached PHY driver [%s] "
466 "(mii_bus:phy_addr=%s, irq=%d)\n",
467 phydev
->drv
->name
, dev_name(&phydev
->dev
), phydev
->irq
);
474 * Buffer allocation/deallocation routines. The buffer descriptor returned
475 * has the virtual and dma address of a buffer suitable for
476 * both, receive and transmit operations.
478 static struct db_dest
*au1000_GetFreeDB(struct au1000_private
*aup
)
484 aup
->pDBfree
= pDB
->pnext
;
489 void au1000_ReleaseDB(struct au1000_private
*aup
, struct db_dest
*pDB
)
491 struct db_dest
*pDBfree
= aup
->pDBfree
;
493 pDBfree
->pnext
= pDB
;
497 static void au1000_reset_mac_unlocked(struct net_device
*dev
)
499 struct au1000_private
*const aup
= netdev_priv(dev
);
502 au1000_hard_stop(dev
);
504 writel(MAC_EN_CLOCK_ENABLE
, aup
->enable
);
506 writel(0, aup
->enable
);
510 for (i
= 0; i
< NUM_RX_DMA
; i
++) {
511 /* reset control bits */
512 aup
->rx_dma_ring
[i
]->buff_stat
&= ~0xf;
514 for (i
= 0; i
< NUM_TX_DMA
; i
++) {
515 /* reset control bits */
516 aup
->tx_dma_ring
[i
]->buff_stat
&= ~0xf;
519 aup
->mac_enabled
= 0;
523 static void au1000_reset_mac(struct net_device
*dev
)
525 struct au1000_private
*const aup
= netdev_priv(dev
);
528 netif_dbg(aup
, hw
, dev
, "reset mac, aup %x\n",
531 spin_lock_irqsave(&aup
->lock
, flags
);
533 au1000_reset_mac_unlocked(dev
);
535 spin_unlock_irqrestore(&aup
->lock
, flags
);
539 * Setup the receive and transmit "rings". These pointers are the addresses
540 * of the rx and tx MAC DMA registers so they are fixed by the hardware --
541 * these are not descriptors sitting in memory.
544 au1000_setup_hw_rings(struct au1000_private
*aup
, u32 rx_base
, u32 tx_base
)
548 for (i
= 0; i
< NUM_RX_DMA
; i
++) {
549 aup
->rx_dma_ring
[i
] =
551 (rx_base
+ sizeof(struct rx_dma
)*i
);
553 for (i
= 0; i
< NUM_TX_DMA
; i
++) {
554 aup
->tx_dma_ring
[i
] =
556 (tx_base
+ sizeof(struct tx_dma
)*i
);
564 static int au1000_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
566 struct au1000_private
*aup
= netdev_priv(dev
);
569 return phy_ethtool_gset(aup
->phy_dev
, cmd
);
574 static int au1000_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
576 struct au1000_private
*aup
= netdev_priv(dev
);
578 if (!capable(CAP_NET_ADMIN
))
582 return phy_ethtool_sset(aup
->phy_dev
, cmd
);
588 au1000_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
590 struct au1000_private
*aup
= netdev_priv(dev
);
592 strcpy(info
->driver
, DRV_NAME
);
593 strcpy(info
->version
, DRV_VERSION
);
594 info
->fw_version
[0] = '\0';
595 sprintf(info
->bus_info
, "%s %d", DRV_NAME
, aup
->mac_id
);
596 info
->regdump_len
= 0;
599 static void au1000_set_msglevel(struct net_device
*dev
, u32 value
)
601 struct au1000_private
*aup
= netdev_priv(dev
);
602 aup
->msg_enable
= value
;
605 static u32
au1000_get_msglevel(struct net_device
*dev
)
607 struct au1000_private
*aup
= netdev_priv(dev
);
608 return aup
->msg_enable
;
611 static const struct ethtool_ops au1000_ethtool_ops
= {
612 .get_settings
= au1000_get_settings
,
613 .set_settings
= au1000_set_settings
,
614 .get_drvinfo
= au1000_get_drvinfo
,
615 .get_link
= ethtool_op_get_link
,
616 .get_msglevel
= au1000_get_msglevel
,
617 .set_msglevel
= au1000_set_msglevel
,
622 * Initialize the interface.
624 * When the device powers up, the clocks are disabled and the
625 * mac is in reset state. When the interface is closed, we
626 * do the same -- reset the device and disable the clocks to
627 * conserve power. Thus, whenever au1000_init() is called,
628 * the device should already be in reset state.
630 static int au1000_init(struct net_device
*dev
)
632 struct au1000_private
*aup
= netdev_priv(dev
);
637 netif_dbg(aup
, hw
, dev
, "au1000_init\n");
639 /* bring the device out of reset */
640 au1000_enable_mac(dev
, 1);
642 spin_lock_irqsave(&aup
->lock
, flags
);
644 writel(0, &aup
->mac
->control
);
645 aup
->tx_head
= (aup
->tx_dma_ring
[0]->buff_stat
& 0xC) >> 2;
646 aup
->tx_tail
= aup
->tx_head
;
647 aup
->rx_head
= (aup
->rx_dma_ring
[0]->buff_stat
& 0xC) >> 2;
649 writel(dev
->dev_addr
[5]<<8 | dev
->dev_addr
[4],
650 &aup
->mac
->mac_addr_high
);
651 writel(dev
->dev_addr
[3]<<24 | dev
->dev_addr
[2]<<16 |
652 dev
->dev_addr
[1]<<8 | dev
->dev_addr
[0],
653 &aup
->mac
->mac_addr_low
);
656 for (i
= 0; i
< NUM_RX_DMA
; i
++)
657 aup
->rx_dma_ring
[i
]->buff_stat
|= RX_DMA_ENABLE
;
661 control
= MAC_RX_ENABLE
| MAC_TX_ENABLE
;
662 #ifndef CONFIG_CPU_LITTLE_ENDIAN
663 control
|= MAC_BIG_ENDIAN
;
666 if (aup
->phy_dev
->link
&& (DUPLEX_FULL
== aup
->phy_dev
->duplex
))
667 control
|= MAC_FULL_DUPLEX
;
669 control
|= MAC_DISABLE_RX_OWN
;
670 } else { /* PHY-less op, assume full-duplex */
671 control
|= MAC_FULL_DUPLEX
;
674 writel(control
, &aup
->mac
->control
);
675 writel(0x8100, &aup
->mac
->vlan1_tag
); /* activate vlan support */
678 spin_unlock_irqrestore(&aup
->lock
, flags
);
682 static inline void au1000_update_rx_stats(struct net_device
*dev
, u32 status
)
684 struct net_device_stats
*ps
= &dev
->stats
;
687 if (status
& RX_MCAST_FRAME
)
690 if (status
& RX_ERROR
) {
692 if (status
& RX_MISSED_FRAME
)
693 ps
->rx_missed_errors
++;
694 if (status
& (RX_OVERLEN
| RX_RUNT
| RX_LEN_ERROR
))
695 ps
->rx_length_errors
++;
696 if (status
& RX_CRC_ERROR
)
698 if (status
& RX_COLL
)
701 ps
->rx_bytes
+= status
& RX_FRAME_LEN_MASK
;
706 * Au1000 receive routine.
708 static int au1000_rx(struct net_device
*dev
)
710 struct au1000_private
*aup
= netdev_priv(dev
);
713 u32 buff_stat
, status
;
717 netif_dbg(aup
, rx_status
, dev
, "au1000_rx head %d\n", aup
->rx_head
);
719 prxd
= aup
->rx_dma_ring
[aup
->rx_head
];
720 buff_stat
= prxd
->buff_stat
;
721 while (buff_stat
& RX_T_DONE
) {
722 status
= prxd
->status
;
723 pDB
= aup
->rx_db_inuse
[aup
->rx_head
];
724 au1000_update_rx_stats(dev
, status
);
725 if (!(status
& RX_ERROR
)) {
728 frmlen
= (status
& RX_FRAME_LEN_MASK
);
729 frmlen
-= 4; /* Remove FCS */
730 skb
= dev_alloc_skb(frmlen
+ 2);
732 netdev_err(dev
, "Memory squeeze, dropping packet.\n");
733 dev
->stats
.rx_dropped
++;
736 skb_reserve(skb
, 2); /* 16 byte IP header align */
737 skb_copy_to_linear_data(skb
,
738 (unsigned char *)pDB
->vaddr
, frmlen
);
739 skb_put(skb
, frmlen
);
740 skb
->protocol
= eth_type_trans(skb
, dev
);
741 netif_rx(skb
); /* pass the packet to upper layers */
743 if (au1000_debug
> 4) {
744 pr_err("rx_error(s):");
745 if (status
& RX_MISSED_FRAME
)
747 if (status
& RX_WDOG_TIMER
)
749 if (status
& RX_RUNT
)
751 if (status
& RX_OVERLEN
)
753 if (status
& RX_COLL
)
755 if (status
& RX_MII_ERROR
)
756 pr_cont(" mii error");
757 if (status
& RX_CRC_ERROR
)
758 pr_cont(" crc error");
759 if (status
& RX_LEN_ERROR
)
760 pr_cont(" len error");
761 if (status
& RX_U_CNTRL_FRAME
)
762 pr_cont(" u control frame");
766 prxd
->buff_stat
= (u32
)(pDB
->dma_addr
| RX_DMA_ENABLE
);
767 aup
->rx_head
= (aup
->rx_head
+ 1) & (NUM_RX_DMA
- 1);
770 /* next descriptor */
771 prxd
= aup
->rx_dma_ring
[aup
->rx_head
];
772 buff_stat
= prxd
->buff_stat
;
777 static void au1000_update_tx_stats(struct net_device
*dev
, u32 status
)
779 struct au1000_private
*aup
= netdev_priv(dev
);
780 struct net_device_stats
*ps
= &dev
->stats
;
782 if (status
& TX_FRAME_ABORTED
) {
783 if (!aup
->phy_dev
|| (DUPLEX_FULL
== aup
->phy_dev
->duplex
)) {
784 if (status
& (TX_JAB_TIMEOUT
| TX_UNDERRUN
)) {
785 /* any other tx errors are only valid
786 * in half duplex mode
789 ps
->tx_aborted_errors
++;
793 ps
->tx_aborted_errors
++;
794 if (status
& (TX_NO_CARRIER
| TX_LOSS_CARRIER
))
795 ps
->tx_carrier_errors
++;
801 * Called from the interrupt service routine to acknowledge
802 * the TX DONE bits. This is a must if the irq is setup as
805 static void au1000_tx_ack(struct net_device
*dev
)
807 struct au1000_private
*aup
= netdev_priv(dev
);
810 ptxd
= aup
->tx_dma_ring
[aup
->tx_tail
];
812 while (ptxd
->buff_stat
& TX_T_DONE
) {
813 au1000_update_tx_stats(dev
, ptxd
->status
);
814 ptxd
->buff_stat
&= ~TX_T_DONE
;
818 aup
->tx_tail
= (aup
->tx_tail
+ 1) & (NUM_TX_DMA
- 1);
819 ptxd
= aup
->tx_dma_ring
[aup
->tx_tail
];
823 netif_wake_queue(dev
);
829 * Au1000 interrupt service routine.
831 static irqreturn_t
au1000_interrupt(int irq
, void *dev_id
)
833 struct net_device
*dev
= dev_id
;
835 /* Handle RX interrupts first to minimize chance of overrun */
839 return IRQ_RETVAL(1);
842 static int au1000_open(struct net_device
*dev
)
845 struct au1000_private
*aup
= netdev_priv(dev
);
847 netif_dbg(aup
, drv
, dev
, "open: dev=%p\n", dev
);
849 retval
= request_irq(dev
->irq
, au1000_interrupt
, 0,
852 netdev_err(dev
, "unable to get IRQ %d\n", dev
->irq
);
856 retval
= au1000_init(dev
);
858 netdev_err(dev
, "error in au1000_init\n");
859 free_irq(dev
->irq
, dev
);
864 /* cause the PHY state machine to schedule a link state check */
865 aup
->phy_dev
->state
= PHY_CHANGELINK
;
866 phy_start(aup
->phy_dev
);
869 netif_start_queue(dev
);
871 netif_dbg(aup
, drv
, dev
, "open: Initialization done.\n");
876 static int au1000_close(struct net_device
*dev
)
879 struct au1000_private
*const aup
= netdev_priv(dev
);
881 netif_dbg(aup
, drv
, dev
, "close: dev=%p\n", dev
);
884 phy_stop(aup
->phy_dev
);
886 spin_lock_irqsave(&aup
->lock
, flags
);
888 au1000_reset_mac_unlocked(dev
);
890 /* stop the device */
891 netif_stop_queue(dev
);
893 /* disable the interrupt */
894 free_irq(dev
->irq
, dev
);
895 spin_unlock_irqrestore(&aup
->lock
, flags
);
901 * Au1000 transmit routine.
903 static netdev_tx_t
au1000_tx(struct sk_buff
*skb
, struct net_device
*dev
)
905 struct au1000_private
*aup
= netdev_priv(dev
);
906 struct net_device_stats
*ps
= &dev
->stats
;
912 netif_dbg(aup
, tx_queued
, dev
, "tx: aup %x len=%d, data=%p, head %d\n",
913 (unsigned)aup
, skb
->len
,
914 skb
->data
, aup
->tx_head
);
916 ptxd
= aup
->tx_dma_ring
[aup
->tx_head
];
917 buff_stat
= ptxd
->buff_stat
;
918 if (buff_stat
& TX_DMA_ENABLE
) {
919 /* We've wrapped around and the transmitter is still busy */
920 netif_stop_queue(dev
);
922 return NETDEV_TX_BUSY
;
923 } else if (buff_stat
& TX_T_DONE
) {
924 au1000_update_tx_stats(dev
, ptxd
->status
);
930 netif_wake_queue(dev
);
933 pDB
= aup
->tx_db_inuse
[aup
->tx_head
];
934 skb_copy_from_linear_data(skb
, (void *)pDB
->vaddr
, skb
->len
);
935 if (skb
->len
< ETH_ZLEN
) {
936 for (i
= skb
->len
; i
< ETH_ZLEN
; i
++)
937 ((char *)pDB
->vaddr
)[i
] = 0;
939 ptxd
->len
= ETH_ZLEN
;
941 ptxd
->len
= skb
->len
;
944 ps
->tx_bytes
+= ptxd
->len
;
946 ptxd
->buff_stat
= pDB
->dma_addr
| TX_DMA_ENABLE
;
949 aup
->tx_head
= (aup
->tx_head
+ 1) & (NUM_TX_DMA
- 1);
954 * The Tx ring has been full longer than the watchdog timeout
955 * value. The transmitter must be hung?
957 static void au1000_tx_timeout(struct net_device
*dev
)
959 netdev_err(dev
, "au1000_tx_timeout: dev=%p\n", dev
);
960 au1000_reset_mac(dev
);
962 dev
->trans_start
= jiffies
; /* prevent tx timeout */
963 netif_wake_queue(dev
);
966 static void au1000_multicast_list(struct net_device
*dev
)
968 struct au1000_private
*aup
= netdev_priv(dev
);
971 netif_dbg(aup
, drv
, dev
, "%s: flags=%x\n", __func__
, dev
->flags
);
972 reg
= readl(&aup
->mac
->control
);
973 if (dev
->flags
& IFF_PROMISC
) { /* Set promiscuous. */
974 reg
|= MAC_PROMISCUOUS
;
975 } else if ((dev
->flags
& IFF_ALLMULTI
) ||
976 netdev_mc_count(dev
) > MULTICAST_FILTER_LIMIT
) {
977 reg
|= MAC_PASS_ALL_MULTI
;
978 reg
&= ~MAC_PROMISCUOUS
;
979 netdev_info(dev
, "Pass all multicast\n");
981 struct netdev_hw_addr
*ha
;
982 u32 mc_filter
[2]; /* Multicast hash filter */
984 mc_filter
[1] = mc_filter
[0] = 0;
985 netdev_for_each_mc_addr(ha
, dev
)
986 set_bit(ether_crc(ETH_ALEN
, ha
->addr
)>>26,
988 writel(mc_filter
[1], &aup
->mac
->multi_hash_high
);
989 writel(mc_filter
[0], &aup
->mac
->multi_hash_low
);
990 reg
&= ~MAC_PROMISCUOUS
;
991 reg
|= MAC_HASH_MODE
;
993 writel(reg
, &aup
->mac
->control
);
996 static int au1000_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
998 struct au1000_private
*aup
= netdev_priv(dev
);
1000 if (!netif_running(dev
))
1004 return -EINVAL
; /* PHY not controllable */
1006 return phy_mii_ioctl(aup
->phy_dev
, rq
, cmd
);
1009 static const struct net_device_ops au1000_netdev_ops
= {
1010 .ndo_open
= au1000_open
,
1011 .ndo_stop
= au1000_close
,
1012 .ndo_start_xmit
= au1000_tx
,
1013 .ndo_set_rx_mode
= au1000_multicast_list
,
1014 .ndo_do_ioctl
= au1000_ioctl
,
1015 .ndo_tx_timeout
= au1000_tx_timeout
,
1016 .ndo_set_mac_address
= eth_mac_addr
,
1017 .ndo_validate_addr
= eth_validate_addr
,
1018 .ndo_change_mtu
= eth_change_mtu
,
1021 static int __devinit
au1000_probe(struct platform_device
*pdev
)
1023 static unsigned version_printed
;
1024 struct au1000_private
*aup
= NULL
;
1025 struct au1000_eth_platform_data
*pd
;
1026 struct net_device
*dev
= NULL
;
1027 struct db_dest
*pDB
, *pDBfree
;
1028 int irq
, i
, err
= 0;
1029 struct resource
*base
, *macen
;
1031 base
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1033 dev_err(&pdev
->dev
, "failed to retrieve base register\n");
1038 macen
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
1040 dev_err(&pdev
->dev
, "failed to retrieve MAC Enable register\n");
1045 irq
= platform_get_irq(pdev
, 0);
1047 dev_err(&pdev
->dev
, "failed to retrieve IRQ\n");
1052 if (!request_mem_region(base
->start
, resource_size(base
),
1054 dev_err(&pdev
->dev
, "failed to request memory region for base registers\n");
1059 if (!request_mem_region(macen
->start
, resource_size(macen
),
1061 dev_err(&pdev
->dev
, "failed to request memory region for MAC enable register\n");
1066 dev
= alloc_etherdev(sizeof(struct au1000_private
));
1068 dev_err(&pdev
->dev
, "alloc_etherdev failed\n");
1073 SET_NETDEV_DEV(dev
, &pdev
->dev
);
1074 platform_set_drvdata(pdev
, dev
);
1075 aup
= netdev_priv(dev
);
1077 spin_lock_init(&aup
->lock
);
1078 aup
->msg_enable
= (au1000_debug
< 4 ?
1079 AU1000_DEF_MSG_ENABLE
: au1000_debug
);
1081 /* Allocate the data buffers
1082 * Snooping works fine with eth on all au1xxx
1084 aup
->vaddr
= (u32
)dma_alloc_noncoherent(NULL
, MAX_BUF_SIZE
*
1085 (NUM_TX_BUFFS
+ NUM_RX_BUFFS
),
1088 dev_err(&pdev
->dev
, "failed to allocate data buffers\n");
1093 /* aup->mac is the base address of the MAC's registers */
1094 aup
->mac
= (struct mac_reg
*)
1095 ioremap_nocache(base
->start
, resource_size(base
));
1097 dev_err(&pdev
->dev
, "failed to ioremap MAC registers\n");
1102 /* Setup some variables for quick register address access */
1103 aup
->enable
= (u32
*)ioremap_nocache(macen
->start
,
1104 resource_size(macen
));
1106 dev_err(&pdev
->dev
, "failed to ioremap MAC enable register\n");
1110 aup
->mac_id
= pdev
->id
;
1113 au1000_setup_hw_rings(aup
, MAC0_RX_DMA_ADDR
, MAC0_TX_DMA_ADDR
);
1114 else if (pdev
->id
== 1)
1115 au1000_setup_hw_rings(aup
, MAC1_RX_DMA_ADDR
, MAC1_TX_DMA_ADDR
);
1117 /* set a random MAC now in case platform_data doesn't provide one */
1118 random_ether_addr(dev
->dev_addr
);
1120 writel(0, aup
->enable
);
1121 aup
->mac_enabled
= 0;
1123 pd
= pdev
->dev
.platform_data
;
1125 dev_info(&pdev
->dev
, "no platform_data passed,"
1126 " PHY search on MAC0\n");
1127 aup
->phy1_search_mac0
= 1;
1129 if (is_valid_ether_addr(pd
->mac
))
1130 memcpy(dev
->dev_addr
, pd
->mac
, 6);
1132 aup
->phy_static_config
= pd
->phy_static_config
;
1133 aup
->phy_search_highest_addr
= pd
->phy_search_highest_addr
;
1134 aup
->phy1_search_mac0
= pd
->phy1_search_mac0
;
1135 aup
->phy_addr
= pd
->phy_addr
;
1136 aup
->phy_busid
= pd
->phy_busid
;
1137 aup
->phy_irq
= pd
->phy_irq
;
1140 if (aup
->phy_busid
&& aup
->phy_busid
> 0) {
1141 dev_err(&pdev
->dev
, "MAC0-associated PHY attached 2nd MACs MII bus not supported yet\n");
1143 goto err_mdiobus_alloc
;
1146 aup
->mii_bus
= mdiobus_alloc();
1147 if (aup
->mii_bus
== NULL
) {
1148 dev_err(&pdev
->dev
, "failed to allocate mdiobus structure\n");
1150 goto err_mdiobus_alloc
;
1153 aup
->mii_bus
->priv
= dev
;
1154 aup
->mii_bus
->read
= au1000_mdiobus_read
;
1155 aup
->mii_bus
->write
= au1000_mdiobus_write
;
1156 aup
->mii_bus
->reset
= au1000_mdiobus_reset
;
1157 aup
->mii_bus
->name
= "au1000_eth_mii";
1158 snprintf(aup
->mii_bus
->id
, MII_BUS_ID_SIZE
, "%x", aup
->mac_id
);
1159 aup
->mii_bus
->irq
= kmalloc(sizeof(int)*PHY_MAX_ADDR
, GFP_KERNEL
);
1160 if (aup
->mii_bus
->irq
== NULL
)
1163 for (i
= 0; i
< PHY_MAX_ADDR
; ++i
)
1164 aup
->mii_bus
->irq
[i
] = PHY_POLL
;
1165 /* if known, set corresponding PHY IRQs */
1166 if (aup
->phy_static_config
)
1167 if (aup
->phy_irq
&& aup
->phy_busid
== aup
->mac_id
)
1168 aup
->mii_bus
->irq
[aup
->phy_addr
] = aup
->phy_irq
;
1170 err
= mdiobus_register(aup
->mii_bus
);
1172 dev_err(&pdev
->dev
, "failed to register MDIO bus\n");
1173 goto err_mdiobus_reg
;
1176 if (au1000_mii_probe(dev
) != 0)
1180 /* setup the data buffer descriptors and attach a buffer to each one */
1182 for (i
= 0; i
< (NUM_TX_BUFFS
+NUM_RX_BUFFS
); i
++) {
1183 pDB
->pnext
= pDBfree
;
1185 pDB
->vaddr
= (u32
*)((unsigned)aup
->vaddr
+ MAX_BUF_SIZE
*i
);
1186 pDB
->dma_addr
= (dma_addr_t
)virt_to_bus(pDB
->vaddr
);
1189 aup
->pDBfree
= pDBfree
;
1191 for (i
= 0; i
< NUM_RX_DMA
; i
++) {
1192 pDB
= au1000_GetFreeDB(aup
);
1196 aup
->rx_dma_ring
[i
]->buff_stat
= (unsigned)pDB
->dma_addr
;
1197 aup
->rx_db_inuse
[i
] = pDB
;
1199 for (i
= 0; i
< NUM_TX_DMA
; i
++) {
1200 pDB
= au1000_GetFreeDB(aup
);
1204 aup
->tx_dma_ring
[i
]->buff_stat
= (unsigned)pDB
->dma_addr
;
1205 aup
->tx_dma_ring
[i
]->len
= 0;
1206 aup
->tx_db_inuse
[i
] = pDB
;
1209 dev
->base_addr
= base
->start
;
1211 dev
->netdev_ops
= &au1000_netdev_ops
;
1212 SET_ETHTOOL_OPS(dev
, &au1000_ethtool_ops
);
1213 dev
->watchdog_timeo
= ETH_TX_TIMEOUT
;
1216 * The boot code uses the ethernet controller, so reset it to start
1217 * fresh. au1000_init() expects that the device is in reset state.
1219 au1000_reset_mac(dev
);
1221 err
= register_netdev(dev
);
1223 netdev_err(dev
, "Cannot register net device, aborting.\n");
1227 netdev_info(dev
, "Au1xx0 Ethernet found at 0x%lx, irq %d\n",
1228 (unsigned long)base
->start
, irq
);
1229 if (version_printed
++ == 0)
1230 pr_info("%s version %s %s\n",
1231 DRV_NAME
, DRV_VERSION
, DRV_AUTHOR
);
1236 if (aup
->mii_bus
!= NULL
)
1237 mdiobus_unregister(aup
->mii_bus
);
1239 /* here we should have a valid dev plus aup-> register addresses
1240 * so we can reset the mac properly.
1242 au1000_reset_mac(dev
);
1244 for (i
= 0; i
< NUM_RX_DMA
; i
++) {
1245 if (aup
->rx_db_inuse
[i
])
1246 au1000_ReleaseDB(aup
, aup
->rx_db_inuse
[i
]);
1248 for (i
= 0; i
< NUM_TX_DMA
; i
++) {
1249 if (aup
->tx_db_inuse
[i
])
1250 au1000_ReleaseDB(aup
, aup
->tx_db_inuse
[i
]);
1253 mdiobus_free(aup
->mii_bus
);
1255 iounmap(aup
->enable
);
1259 dma_free_noncoherent(NULL
, MAX_BUF_SIZE
* (NUM_TX_BUFFS
+ NUM_RX_BUFFS
),
1260 (void *)aup
->vaddr
, aup
->dma_addr
);
1264 release_mem_region(macen
->start
, resource_size(macen
));
1266 release_mem_region(base
->start
, resource_size(base
));
1271 static int __devexit
au1000_remove(struct platform_device
*pdev
)
1273 struct net_device
*dev
= platform_get_drvdata(pdev
);
1274 struct au1000_private
*aup
= netdev_priv(dev
);
1276 struct resource
*base
, *macen
;
1278 platform_set_drvdata(pdev
, NULL
);
1280 unregister_netdev(dev
);
1281 mdiobus_unregister(aup
->mii_bus
);
1282 mdiobus_free(aup
->mii_bus
);
1284 for (i
= 0; i
< NUM_RX_DMA
; i
++)
1285 if (aup
->rx_db_inuse
[i
])
1286 au1000_ReleaseDB(aup
, aup
->rx_db_inuse
[i
]);
1288 for (i
= 0; i
< NUM_TX_DMA
; i
++)
1289 if (aup
->tx_db_inuse
[i
])
1290 au1000_ReleaseDB(aup
, aup
->tx_db_inuse
[i
]);
1292 dma_free_noncoherent(NULL
, MAX_BUF_SIZE
*
1293 (NUM_TX_BUFFS
+ NUM_RX_BUFFS
),
1294 (void *)aup
->vaddr
, aup
->dma_addr
);
1297 iounmap(aup
->enable
);
1299 base
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1300 release_mem_region(base
->start
, resource_size(base
));
1302 macen
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
1303 release_mem_region(macen
->start
, resource_size(macen
));
1310 static struct platform_driver au1000_eth_driver
= {
1311 .probe
= au1000_probe
,
1312 .remove
= __devexit_p(au1000_remove
),
1314 .name
= "au1000-eth",
1315 .owner
= THIS_MODULE
,
1318 MODULE_ALIAS("platform:au1000-eth");
1321 static int __init
au1000_init_module(void)
1323 return platform_driver_register(&au1000_eth_driver
);
1326 static void __exit
au1000_exit_module(void)
1328 platform_driver_unregister(&au1000_eth_driver
);
1331 module_init(au1000_init_module
);
1332 module_exit(au1000_exit_module
);