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/dma-mapping.h>
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/string.h>
41 #include <linux/timer.h>
42 #include <linux/errno.h>
44 #include <linux/ioport.h>
45 #include <linux/bitops.h>
46 #include <linux/slab.h>
47 #include <linux/interrupt.h>
48 #include <linux/init.h>
49 #include <linux/netdevice.h>
50 #include <linux/etherdevice.h>
51 #include <linux/ethtool.h>
52 #include <linux/mii.h>
53 #include <linux/skbuff.h>
54 #include <linux/delay.h>
55 #include <linux/crc32.h>
56 #include <linux/phy.h>
59 #include <asm/mipsregs.h>
62 #include <asm/processor.h>
67 #include "au1000_eth.h"
69 #ifdef AU1000_ETH_DEBUG
70 static int au1000_debug = 5;
72 static int au1000_debug = 3;
75 #define DRV_NAME "au1000_eth"
76 #define DRV_VERSION "1.6"
77 #define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>"
78 #define DRV_DESC "Au1xxx on-chip Ethernet driver"
80 MODULE_AUTHOR(DRV_AUTHOR);
81 MODULE_DESCRIPTION(DRV_DESC);
82 MODULE_LICENSE("GPL");
85 static void hard_stop(struct net_device *);
86 static void enable_rx_tx(struct net_device *dev);
87 static struct net_device * au1000_probe(int port_num);
88 static int au1000_init(struct net_device *);
89 static int au1000_open(struct net_device *);
90 static int au1000_close(struct net_device *);
91 static int au1000_tx(struct sk_buff *, struct net_device *);
92 static int au1000_rx(struct net_device *);
93 static irqreturn_t au1000_interrupt(int, void *);
94 static void au1000_tx_timeout(struct net_device *);
95 static void set_rx_mode(struct net_device *);
96 static int au1000_ioctl(struct net_device *, struct ifreq *, int);
97 static int mdio_read(struct net_device *, int, int);
98 static void mdio_write(struct net_device *, int, int, u16);
99 static void au1000_adjust_link(struct net_device *);
100 static void enable_mac(struct net_device *, int);
103 * Theory of operation
105 * The Au1000 MACs use a simple rx and tx descriptor ring scheme.
106 * There are four receive and four transmit descriptors. These
107 * descriptors are not in memory; rather, they are just a set of
108 * hardware registers.
110 * Since the Au1000 has a coherent data cache, the receive and
111 * transmit buffers are allocated from the KSEG0 segment. The
112 * hardware registers, however, are still mapped at KSEG1 to
113 * make sure there's no out-of-order writes, and that all writes
114 * complete immediately.
117 /* These addresses are only used if yamon doesn't tell us what
118 * the mac address is, and the mac address is not passed on the
121 static unsigned char au1000_mac_addr[6] __devinitdata = {
122 0x00, 0x50, 0xc2, 0x0c, 0x30, 0x00
125 struct au1000_private *au_macs[NUM_ETH_INTERFACES];
128 * board-specific configurations
130 * PHY detection algorithm
132 * If AU1XXX_PHY_STATIC_CONFIG is undefined, the PHY setup is
135 * mii_probe() first searches the current MAC's MII bus for a PHY,
136 * selecting the first (or last, if AU1XXX_PHY_SEARCH_HIGHEST_ADDR is
137 * defined) PHY address not already claimed by another netdev.
139 * If nothing was found that way when searching for the 2nd ethernet
140 * controller's PHY and AU1XXX_PHY1_SEARCH_ON_MAC0 is defined, then
141 * the first MII bus is searched as well for an unclaimed PHY; this is
142 * needed in case of a dual-PHY accessible only through the MAC0's MII
145 * Finally, if no PHY is found, then the corresponding ethernet
146 * controller is not registered to the network subsystem.
149 /* autodetection defaults */
150 #undef AU1XXX_PHY_SEARCH_HIGHEST_ADDR
151 #define AU1XXX_PHY1_SEARCH_ON_MAC0
155 * most boards PHY setup should be detectable properly with the
156 * autodetection algorithm in mii_probe(), but in some cases (e.g. if
157 * you have a switch attached, or want to use the PHY's interrupt
158 * notification capabilities) you can provide a static PHY
161 * IRQs may only be set, if a PHY address was configured
162 * If a PHY address is given, also a bus id is required to be set
164 * ps: make sure the used irqs are configured properly in the board
168 #if defined(CONFIG_MIPS_BOSPORUS)
170 * Micrel/Kendin 5 port switch attached to MAC0,
171 * MAC0 is associated with PHY address 5 (== WAN port)
172 * MAC1 is not associated with any PHY, since it's connected directly
174 * no interrupts are used
176 # define AU1XXX_PHY_STATIC_CONFIG
178 # define AU1XXX_PHY0_ADDR 5
179 # define AU1XXX_PHY0_BUSID 0
180 # undef AU1XXX_PHY0_IRQ
182 # undef AU1XXX_PHY1_ADDR
183 # undef AU1XXX_PHY1_BUSID
184 # undef AU1XXX_PHY1_IRQ
187 #if defined(AU1XXX_PHY0_BUSID) && (AU1XXX_PHY0_BUSID > 0)
188 # error MAC0-associated PHY attached 2nd MACs MII bus not supported yet
194 static int mdio_read(struct net_device *dev, int phy_addr, int reg)
196 struct au1000_private *aup = (struct au1000_private *) dev->priv;
197 volatile u32 *const mii_control_reg = &aup->mac->mii_control;
198 volatile u32 *const mii_data_reg = &aup->mac->mii_data;
202 while (*mii_control_reg & MAC_MII_BUSY) {
204 if (--timedout == 0) {
205 printk(KERN_ERR "%s: read_MII busy timeout!!\n",
211 mii_control = MAC_SET_MII_SELECT_REG(reg) |
212 MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ;
214 *mii_control_reg = mii_control;
217 while (*mii_control_reg & MAC_MII_BUSY) {
219 if (--timedout == 0) {
220 printk(KERN_ERR "%s: mdio_read busy timeout!!\n",
225 return (int)*mii_data_reg;
228 static void mdio_write(struct net_device *dev, int phy_addr, int reg, u16 value)
230 struct au1000_private *aup = (struct au1000_private *) dev->priv;
231 volatile u32 *const mii_control_reg = &aup->mac->mii_control;
232 volatile u32 *const mii_data_reg = &aup->mac->mii_data;
236 while (*mii_control_reg & MAC_MII_BUSY) {
238 if (--timedout == 0) {
239 printk(KERN_ERR "%s: mdio_write busy timeout!!\n",
245 mii_control = MAC_SET_MII_SELECT_REG(reg) |
246 MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE;
248 *mii_data_reg = value;
249 *mii_control_reg = mii_control;
252 static int mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
254 /* WARNING: bus->phy_map[phy_addr].attached_dev == dev does
255 * _NOT_ hold (e.g. when PHY is accessed through other MAC's MII bus) */
256 struct net_device *const dev = bus->priv;
258 enable_mac(dev, 0); /* make sure the MAC associated with this
259 * mii_bus is enabled */
260 return mdio_read(dev, phy_addr, regnum);
263 static int mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
266 struct net_device *const dev = bus->priv;
268 enable_mac(dev, 0); /* make sure the MAC associated with this
269 * mii_bus is enabled */
270 mdio_write(dev, phy_addr, regnum, value);
274 static int mdiobus_reset(struct mii_bus *bus)
276 struct net_device *const dev = bus->priv;
278 enable_mac(dev, 0); /* make sure the MAC associated with this
279 * mii_bus is enabled */
283 static int mii_probe (struct net_device *dev)
285 struct au1000_private *const aup = (struct au1000_private *) dev->priv;
286 struct phy_device *phydev = NULL;
288 #if defined(AU1XXX_PHY_STATIC_CONFIG)
289 BUG_ON(aup->mac_id < 0 || aup->mac_id > 1);
291 if(aup->mac_id == 0) { /* get PHY0 */
292 # if defined(AU1XXX_PHY0_ADDR)
293 phydev = au_macs[AU1XXX_PHY0_BUSID]->mii_bus.phy_map[AU1XXX_PHY0_ADDR];
295 printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
298 # endif /* defined(AU1XXX_PHY0_ADDR) */
299 } else if (aup->mac_id == 1) { /* get PHY1 */
300 # if defined(AU1XXX_PHY1_ADDR)
301 phydev = au_macs[AU1XXX_PHY1_BUSID]->mii_bus.phy_map[AU1XXX_PHY1_ADDR];
303 printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
306 # endif /* defined(AU1XXX_PHY1_ADDR) */
309 #else /* defined(AU1XXX_PHY_STATIC_CONFIG) */
312 /* find the first (lowest address) PHY on the current MAC's MII bus */
313 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++)
314 if (aup->mii_bus.phy_map[phy_addr]) {
315 phydev = aup->mii_bus.phy_map[phy_addr];
316 # if !defined(AU1XXX_PHY_SEARCH_HIGHEST_ADDR)
317 break; /* break out with first one found */
321 # if defined(AU1XXX_PHY1_SEARCH_ON_MAC0)
322 /* try harder to find a PHY */
323 if (!phydev && (aup->mac_id == 1)) {
324 /* no PHY found, maybe we have a dual PHY? */
325 printk (KERN_INFO DRV_NAME ": no PHY found on MAC1, "
326 "let's see if it's attached to MAC0...\n");
330 /* find the first (lowest address) non-attached PHY on
331 * the MAC0 MII bus */
332 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
333 struct phy_device *const tmp_phydev =
334 au_macs[0]->mii_bus.phy_map[phy_addr];
337 continue; /* no PHY here... */
339 if (tmp_phydev->attached_dev)
340 continue; /* already claimed by MAC0 */
343 break; /* found it */
346 # endif /* defined(AU1XXX_PHY1_SEARCH_OTHER_BUS) */
348 #endif /* defined(AU1XXX_PHY_STATIC_CONFIG) */
350 printk (KERN_ERR DRV_NAME ":%s: no PHY found\n", dev->name);
354 /* now we are supposed to have a proper phydev, to attach to... */
356 BUG_ON(phydev->attached_dev);
358 phydev = phy_connect(dev, phydev->dev.bus_id, &au1000_adjust_link, 0,
359 PHY_INTERFACE_MODE_MII);
361 if (IS_ERR(phydev)) {
362 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
363 return PTR_ERR(phydev);
366 /* mask with MAC supported features */
367 phydev->supported &= (SUPPORTED_10baseT_Half
368 | SUPPORTED_10baseT_Full
369 | SUPPORTED_100baseT_Half
370 | SUPPORTED_100baseT_Full
372 /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
376 phydev->advertising = phydev->supported;
380 aup->old_duplex = -1;
381 aup->phy_dev = phydev;
383 printk(KERN_INFO "%s: attached PHY driver [%s] "
384 "(mii_bus:phy_addr=%s, irq=%d)\n",
385 dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
392 * Buffer allocation/deallocation routines. The buffer descriptor returned
393 * has the virtual and dma address of a buffer suitable for
394 * both, receive and transmit operations.
396 static db_dest_t *GetFreeDB(struct au1000_private *aup)
402 aup->pDBfree = pDB->pnext;
407 void ReleaseDB(struct au1000_private *aup, db_dest_t *pDB)
409 db_dest_t *pDBfree = aup->pDBfree;
411 pDBfree->pnext = pDB;
415 static void enable_rx_tx(struct net_device *dev)
417 struct au1000_private *aup = (struct au1000_private *) dev->priv;
419 if (au1000_debug > 4)
420 printk(KERN_INFO "%s: enable_rx_tx\n", dev->name);
422 aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE);
426 static void hard_stop(struct net_device *dev)
428 struct au1000_private *aup = (struct au1000_private *) dev->priv;
430 if (au1000_debug > 4)
431 printk(KERN_INFO "%s: hard stop\n", dev->name);
433 aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE);
437 static void enable_mac(struct net_device *dev, int force_reset)
440 struct au1000_private *aup = (struct au1000_private *) dev->priv;
442 spin_lock_irqsave(&aup->lock, flags);
444 if(force_reset || (!aup->mac_enabled)) {
445 *aup->enable = MAC_EN_CLOCK_ENABLE;
447 *aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2
448 | MAC_EN_CLOCK_ENABLE);
451 aup->mac_enabled = 1;
454 spin_unlock_irqrestore(&aup->lock, flags);
457 static void reset_mac_unlocked(struct net_device *dev)
459 struct au1000_private *const aup = (struct au1000_private *) dev->priv;
464 *aup->enable = MAC_EN_CLOCK_ENABLE;
470 for (i = 0; i < NUM_RX_DMA; i++) {
471 /* reset control bits */
472 aup->rx_dma_ring[i]->buff_stat &= ~0xf;
474 for (i = 0; i < NUM_TX_DMA; i++) {
475 /* reset control bits */
476 aup->tx_dma_ring[i]->buff_stat &= ~0xf;
479 aup->mac_enabled = 0;
483 static void reset_mac(struct net_device *dev)
485 struct au1000_private *const aup = (struct au1000_private *) dev->priv;
488 if (au1000_debug > 4)
489 printk(KERN_INFO "%s: reset mac, aup %x\n",
490 dev->name, (unsigned)aup);
492 spin_lock_irqsave(&aup->lock, flags);
494 reset_mac_unlocked (dev);
496 spin_unlock_irqrestore(&aup->lock, flags);
500 * Setup the receive and transmit "rings". These pointers are the addresses
501 * of the rx and tx MAC DMA registers so they are fixed by the hardware --
502 * these are not descriptors sitting in memory.
505 setup_hw_rings(struct au1000_private *aup, u32 rx_base, u32 tx_base)
509 for (i = 0; i < NUM_RX_DMA; i++) {
510 aup->rx_dma_ring[i] =
511 (volatile rx_dma_t *) (rx_base + sizeof(rx_dma_t)*i);
513 for (i = 0; i < NUM_TX_DMA; i++) {
514 aup->tx_dma_ring[i] =
515 (volatile tx_dma_t *) (tx_base + sizeof(tx_dma_t)*i);
523 struct net_device *dev;
525 #ifdef CONFIG_SOC_AU1000
526 {AU1000_ETH0_BASE, AU1000_MAC0_ENABLE, AU1000_MAC0_DMA_INT},
527 {AU1000_ETH1_BASE, AU1000_MAC1_ENABLE, AU1000_MAC1_DMA_INT}
529 #ifdef CONFIG_SOC_AU1100
530 {AU1100_ETH0_BASE, AU1100_MAC0_ENABLE, AU1100_MAC0_DMA_INT}
532 #ifdef CONFIG_SOC_AU1500
533 {AU1500_ETH0_BASE, AU1500_MAC0_ENABLE, AU1500_MAC0_DMA_INT},
534 {AU1500_ETH1_BASE, AU1500_MAC1_ENABLE, AU1500_MAC1_DMA_INT}
536 #ifdef CONFIG_SOC_AU1550
537 {AU1550_ETH0_BASE, AU1550_MAC0_ENABLE, AU1550_MAC0_DMA_INT},
538 {AU1550_ETH1_BASE, AU1550_MAC1_ENABLE, AU1550_MAC1_DMA_INT}
545 * Setup the base address and interrupt of the Au1xxx ethernet macs
546 * based on cpu type and whether the interface is enabled in sys_pinfunc
547 * register. The last interface is enabled if SYS_PF_NI2 (bit 4) is 0.
549 static int __init au1000_init_module(void)
551 int ni = (int)((au_readl(SYS_PINFUNC) & (u32)(SYS_PF_NI2)) >> 4);
552 struct net_device *dev;
553 int i, found_one = 0;
555 num_ifs = NUM_ETH_INTERFACES - ni;
557 for(i = 0; i < num_ifs; i++) {
558 dev = au1000_probe(i);
572 static int au1000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
574 struct au1000_private *aup = (struct au1000_private *)dev->priv;
577 return phy_ethtool_gset(aup->phy_dev, cmd);
582 static int au1000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
584 struct au1000_private *aup = (struct au1000_private *)dev->priv;
586 if (!capable(CAP_NET_ADMIN))
590 return phy_ethtool_sset(aup->phy_dev, cmd);
596 au1000_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
598 struct au1000_private *aup = (struct au1000_private *)dev->priv;
600 strcpy(info->driver, DRV_NAME);
601 strcpy(info->version, DRV_VERSION);
602 info->fw_version[0] = '\0';
603 sprintf(info->bus_info, "%s %d", DRV_NAME, aup->mac_id);
604 info->regdump_len = 0;
607 static const struct ethtool_ops au1000_ethtool_ops = {
608 .get_settings = au1000_get_settings,
609 .set_settings = au1000_set_settings,
610 .get_drvinfo = au1000_get_drvinfo,
611 .get_link = ethtool_op_get_link,
614 static struct net_device * au1000_probe(int port_num)
616 static unsigned version_printed = 0;
617 struct au1000_private *aup = NULL;
618 struct net_device *dev = NULL;
619 db_dest_t *pDB, *pDBfree;
624 if (port_num >= NUM_ETH_INTERFACES)
627 base = CPHYSADDR(iflist[port_num].base_addr );
628 macen = CPHYSADDR(iflist[port_num].macen_addr);
629 irq = iflist[port_num].irq;
631 if (!request_mem_region( base, MAC_IOSIZE, "Au1x00 ENET") ||
632 !request_mem_region(macen, 4, "Au1x00 ENET"))
635 if (version_printed++ == 0)
636 printk("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR);
638 dev = alloc_etherdev(sizeof(struct au1000_private));
640 printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME);
644 if ((err = register_netdev(dev)) != 0) {
645 printk(KERN_ERR "%s: Cannot register net device, error %d\n",
651 printk("%s: Au1xx0 Ethernet found at 0x%x, irq %d\n",
652 dev->name, base, irq);
656 /* Allocate the data buffers */
657 /* Snooping works fine with eth on all au1xxx */
658 aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE *
659 (NUM_TX_BUFFS + NUM_RX_BUFFS),
663 release_mem_region( base, MAC_IOSIZE);
664 release_mem_region(macen, 4);
668 /* aup->mac is the base address of the MAC's registers */
669 aup->mac = (volatile mac_reg_t *)iflist[port_num].base_addr;
671 /* Setup some variables for quick register address access */
672 aup->enable = (volatile u32 *)iflist[port_num].macen_addr;
673 aup->mac_id = port_num;
674 au_macs[port_num] = aup;
677 if (prom_get_ethernet_addr(ethaddr) == 0)
678 memcpy(au1000_mac_addr, ethaddr, sizeof(au1000_mac_addr));
680 printk(KERN_INFO "%s: No MAC address found\n",
682 /* Use the hard coded MAC addresses */
685 setup_hw_rings(aup, MAC0_RX_DMA_ADDR, MAC0_TX_DMA_ADDR);
686 } else if (port_num == 1)
687 setup_hw_rings(aup, MAC1_RX_DMA_ADDR, MAC1_TX_DMA_ADDR);
690 * Assign to the Ethernet ports two consecutive MAC addresses
691 * to match those that are printed on their stickers
693 memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr));
694 dev->dev_addr[5] += port_num;
697 aup->mac_enabled = 0;
699 aup->mii_bus.priv = dev;
700 aup->mii_bus.read = mdiobus_read;
701 aup->mii_bus.write = mdiobus_write;
702 aup->mii_bus.reset = mdiobus_reset;
703 aup->mii_bus.name = "au1000_eth_mii";
704 snprintf(aup->mii_bus.id, MII_BUS_ID_SIZE, "%x", aup->mac_id);
705 aup->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
706 for(i = 0; i < PHY_MAX_ADDR; ++i)
707 aup->mii_bus.irq[i] = PHY_POLL;
709 /* if known, set corresponding PHY IRQs */
710 #if defined(AU1XXX_PHY_STATIC_CONFIG)
711 # if defined(AU1XXX_PHY0_IRQ)
712 if (AU1XXX_PHY0_BUSID == aup->mac_id)
713 aup->mii_bus.irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ;
715 # if defined(AU1XXX_PHY1_IRQ)
716 if (AU1XXX_PHY1_BUSID == aup->mac_id)
717 aup->mii_bus.irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ;
720 mdiobus_register(&aup->mii_bus);
722 if (mii_probe(dev) != 0) {
727 /* setup the data buffer descriptors and attach a buffer to each one */
729 for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) {
730 pDB->pnext = pDBfree;
732 pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i);
733 pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
736 aup->pDBfree = pDBfree;
738 for (i = 0; i < NUM_RX_DMA; i++) {
739 pDB = GetFreeDB(aup);
743 aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
744 aup->rx_db_inuse[i] = pDB;
746 for (i = 0; i < NUM_TX_DMA; i++) {
747 pDB = GetFreeDB(aup);
751 aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
752 aup->tx_dma_ring[i]->len = 0;
753 aup->tx_db_inuse[i] = pDB;
756 spin_lock_init(&aup->lock);
757 dev->base_addr = base;
759 dev->open = au1000_open;
760 dev->hard_start_xmit = au1000_tx;
761 dev->stop = au1000_close;
762 dev->set_multicast_list = &set_rx_mode;
763 dev->do_ioctl = &au1000_ioctl;
764 SET_ETHTOOL_OPS(dev, &au1000_ethtool_ops);
765 dev->tx_timeout = au1000_tx_timeout;
766 dev->watchdog_timeo = ETH_TX_TIMEOUT;
769 * The boot code uses the ethernet controller, so reset it to start
770 * fresh. au1000_init() expects that the device is in reset state.
777 /* here we should have a valid dev plus aup-> register addresses
778 * so we can reset the mac properly.*/
781 for (i = 0; i < NUM_RX_DMA; i++) {
782 if (aup->rx_db_inuse[i])
783 ReleaseDB(aup, aup->rx_db_inuse[i]);
785 for (i = 0; i < NUM_TX_DMA; i++) {
786 if (aup->tx_db_inuse[i])
787 ReleaseDB(aup, aup->tx_db_inuse[i]);
789 dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
790 (void *)aup->vaddr, aup->dma_addr);
791 unregister_netdev(dev);
793 release_mem_region( base, MAC_IOSIZE);
794 release_mem_region(macen, 4);
799 * Initialize the interface.
801 * When the device powers up, the clocks are disabled and the
802 * mac is in reset state. When the interface is closed, we
803 * do the same -- reset the device and disable the clocks to
804 * conserve power. Thus, whenever au1000_init() is called,
805 * the device should already be in reset state.
807 static int au1000_init(struct net_device *dev)
809 struct au1000_private *aup = (struct au1000_private *) dev->priv;
814 if (au1000_debug > 4)
815 printk("%s: au1000_init\n", dev->name);
817 /* bring the device out of reset */
820 spin_lock_irqsave(&aup->lock, flags);
822 aup->mac->control = 0;
823 aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2;
824 aup->tx_tail = aup->tx_head;
825 aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2;
827 aup->mac->mac_addr_high = dev->dev_addr[5]<<8 | dev->dev_addr[4];
828 aup->mac->mac_addr_low = dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 |
829 dev->dev_addr[1]<<8 | dev->dev_addr[0];
831 for (i = 0; i < NUM_RX_DMA; i++) {
832 aup->rx_dma_ring[i]->buff_stat |= RX_DMA_ENABLE;
836 control = MAC_RX_ENABLE | MAC_TX_ENABLE;
837 #ifndef CONFIG_CPU_LITTLE_ENDIAN
838 control |= MAC_BIG_ENDIAN;
841 if (aup->phy_dev->link && (DUPLEX_FULL == aup->phy_dev->duplex))
842 control |= MAC_FULL_DUPLEX;
844 control |= MAC_DISABLE_RX_OWN;
845 } else { /* PHY-less op, assume full-duplex */
846 control |= MAC_FULL_DUPLEX;
849 aup->mac->control = control;
850 aup->mac->vlan1_tag = 0x8100; /* activate vlan support */
853 spin_unlock_irqrestore(&aup->lock, flags);
858 au1000_adjust_link(struct net_device *dev)
860 struct au1000_private *aup = (struct au1000_private *) dev->priv;
861 struct phy_device *phydev = aup->phy_dev;
864 int status_change = 0;
866 BUG_ON(!aup->phy_dev);
868 spin_lock_irqsave(&aup->lock, flags);
870 if (phydev->link && (aup->old_speed != phydev->speed)) {
873 switch(phydev->speed) {
879 "%s: Speed (%d) is not 10/100 ???\n",
880 dev->name, phydev->speed);
884 aup->old_speed = phydev->speed;
889 if (phydev->link && (aup->old_duplex != phydev->duplex)) {
890 // duplex mode changed
892 /* switching duplex mode requires to disable rx and tx! */
895 if (DUPLEX_FULL == phydev->duplex)
896 aup->mac->control = ((aup->mac->control
898 & ~MAC_DISABLE_RX_OWN);
900 aup->mac->control = ((aup->mac->control
902 | MAC_DISABLE_RX_OWN);
906 aup->old_duplex = phydev->duplex;
911 if(phydev->link != aup->old_link) {
912 // link state changed
917 aup->old_duplex = -1;
920 aup->old_link = phydev->link;
924 spin_unlock_irqrestore(&aup->lock, flags);
928 printk(KERN_INFO "%s: link up (%d/%s)\n",
929 dev->name, phydev->speed,
930 DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
932 printk(KERN_INFO "%s: link down\n", dev->name);
936 static int au1000_open(struct net_device *dev)
939 struct au1000_private *aup = (struct au1000_private *) dev->priv;
941 if (au1000_debug > 4)
942 printk("%s: open: dev=%p\n", dev->name, dev);
944 if ((retval = request_irq(dev->irq, &au1000_interrupt, 0,
946 printk(KERN_ERR "%s: unable to get IRQ %d\n",
947 dev->name, dev->irq);
951 if ((retval = au1000_init(dev))) {
952 printk(KERN_ERR "%s: error in au1000_init\n", dev->name);
953 free_irq(dev->irq, dev);
958 /* cause the PHY state machine to schedule a link state check */
959 aup->phy_dev->state = PHY_CHANGELINK;
960 phy_start(aup->phy_dev);
963 netif_start_queue(dev);
965 if (au1000_debug > 4)
966 printk("%s: open: Initialization done.\n", dev->name);
971 static int au1000_close(struct net_device *dev)
974 struct au1000_private *const aup = (struct au1000_private *) dev->priv;
976 if (au1000_debug > 4)
977 printk("%s: close: dev=%p\n", dev->name, dev);
980 phy_stop(aup->phy_dev);
982 spin_lock_irqsave(&aup->lock, flags);
984 reset_mac_unlocked (dev);
986 /* stop the device */
987 netif_stop_queue(dev);
989 /* disable the interrupt */
990 free_irq(dev->irq, dev);
991 spin_unlock_irqrestore(&aup->lock, flags);
996 static void __exit au1000_cleanup_module(void)
999 struct net_device *dev;
1000 struct au1000_private *aup;
1002 for (i = 0; i < num_ifs; i++) {
1003 dev = iflist[i].dev;
1005 aup = (struct au1000_private *) dev->priv;
1006 unregister_netdev(dev);
1007 for (j = 0; j < NUM_RX_DMA; j++)
1008 if (aup->rx_db_inuse[j])
1009 ReleaseDB(aup, aup->rx_db_inuse[j]);
1010 for (j = 0; j < NUM_TX_DMA; j++)
1011 if (aup->tx_db_inuse[j])
1012 ReleaseDB(aup, aup->tx_db_inuse[j]);
1013 dma_free_noncoherent(NULL, MAX_BUF_SIZE *
1014 (NUM_TX_BUFFS + NUM_RX_BUFFS),
1015 (void *)aup->vaddr, aup->dma_addr);
1016 release_mem_region(dev->base_addr, MAC_IOSIZE);
1017 release_mem_region(CPHYSADDR(iflist[i].macen_addr), 4);
1023 static void update_tx_stats(struct net_device *dev, u32 status)
1025 struct au1000_private *aup = (struct au1000_private *) dev->priv;
1026 struct net_device_stats *ps = &dev->stats;
1028 if (status & TX_FRAME_ABORTED) {
1029 if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) {
1030 if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) {
1031 /* any other tx errors are only valid
1032 * in half duplex mode */
1034 ps->tx_aborted_errors++;
1039 ps->tx_aborted_errors++;
1040 if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER))
1041 ps->tx_carrier_errors++;
1048 * Called from the interrupt service routine to acknowledge
1049 * the TX DONE bits. This is a must if the irq is setup as
1052 static void au1000_tx_ack(struct net_device *dev)
1054 struct au1000_private *aup = (struct au1000_private *) dev->priv;
1055 volatile tx_dma_t *ptxd;
1057 ptxd = aup->tx_dma_ring[aup->tx_tail];
1059 while (ptxd->buff_stat & TX_T_DONE) {
1060 update_tx_stats(dev, ptxd->status);
1061 ptxd->buff_stat &= ~TX_T_DONE;
1065 aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1);
1066 ptxd = aup->tx_dma_ring[aup->tx_tail];
1070 netif_wake_queue(dev);
1077 * Au1000 transmit routine.
1079 static int au1000_tx(struct sk_buff *skb, struct net_device *dev)
1081 struct au1000_private *aup = (struct au1000_private *) dev->priv;
1082 struct net_device_stats *ps = &dev->stats;
1083 volatile tx_dma_t *ptxd;
1088 if (au1000_debug > 5)
1089 printk("%s: tx: aup %x len=%d, data=%p, head %d\n",
1090 dev->name, (unsigned)aup, skb->len,
1091 skb->data, aup->tx_head);
1093 ptxd = aup->tx_dma_ring[aup->tx_head];
1094 buff_stat = ptxd->buff_stat;
1095 if (buff_stat & TX_DMA_ENABLE) {
1096 /* We've wrapped around and the transmitter is still busy */
1097 netif_stop_queue(dev);
1101 else if (buff_stat & TX_T_DONE) {
1102 update_tx_stats(dev, ptxd->status);
1108 netif_wake_queue(dev);
1111 pDB = aup->tx_db_inuse[aup->tx_head];
1112 skb_copy_from_linear_data(skb, pDB->vaddr, skb->len);
1113 if (skb->len < ETH_ZLEN) {
1114 for (i=skb->len; i<ETH_ZLEN; i++) {
1115 ((char *)pDB->vaddr)[i] = 0;
1117 ptxd->len = ETH_ZLEN;
1120 ptxd->len = skb->len;
1123 ps->tx_bytes += ptxd->len;
1125 ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE;
1128 aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1);
1129 dev->trans_start = jiffies;
1133 static inline void update_rx_stats(struct net_device *dev, u32 status)
1135 struct au1000_private *aup = (struct au1000_private *) dev->priv;
1136 struct net_device_stats *ps = &dev->stats;
1139 if (status & RX_MCAST_FRAME)
1142 if (status & RX_ERROR) {
1144 if (status & RX_MISSED_FRAME)
1145 ps->rx_missed_errors++;
1146 if (status & (RX_OVERLEN | RX_OVERLEN | RX_LEN_ERROR))
1147 ps->rx_length_errors++;
1148 if (status & RX_CRC_ERROR)
1149 ps->rx_crc_errors++;
1150 if (status & RX_COLL)
1154 ps->rx_bytes += status & RX_FRAME_LEN_MASK;
1159 * Au1000 receive routine.
1161 static int au1000_rx(struct net_device *dev)
1163 struct au1000_private *aup = (struct au1000_private *) dev->priv;
1164 struct sk_buff *skb;
1165 volatile rx_dma_t *prxd;
1166 u32 buff_stat, status;
1170 if (au1000_debug > 5)
1171 printk("%s: au1000_rx head %d\n", dev->name, aup->rx_head);
1173 prxd = aup->rx_dma_ring[aup->rx_head];
1174 buff_stat = prxd->buff_stat;
1175 while (buff_stat & RX_T_DONE) {
1176 status = prxd->status;
1177 pDB = aup->rx_db_inuse[aup->rx_head];
1178 update_rx_stats(dev, status);
1179 if (!(status & RX_ERROR)) {
1182 frmlen = (status & RX_FRAME_LEN_MASK);
1183 frmlen -= 4; /* Remove FCS */
1184 skb = dev_alloc_skb(frmlen + 2);
1187 "%s: Memory squeeze, dropping packet.\n",
1189 dev->stats.rx_dropped++;
1192 skb_reserve(skb, 2); /* 16 byte IP header align */
1193 skb_copy_to_linear_data(skb,
1194 (unsigned char *)pDB->vaddr, frmlen);
1195 skb_put(skb, frmlen);
1196 skb->protocol = eth_type_trans(skb, dev);
1197 netif_rx(skb); /* pass the packet to upper layers */
1200 if (au1000_debug > 4) {
1201 if (status & RX_MISSED_FRAME)
1202 printk("rx miss\n");
1203 if (status & RX_WDOG_TIMER)
1204 printk("rx wdog\n");
1205 if (status & RX_RUNT)
1206 printk("rx runt\n");
1207 if (status & RX_OVERLEN)
1208 printk("rx overlen\n");
1209 if (status & RX_COLL)
1210 printk("rx coll\n");
1211 if (status & RX_MII_ERROR)
1212 printk("rx mii error\n");
1213 if (status & RX_CRC_ERROR)
1214 printk("rx crc error\n");
1215 if (status & RX_LEN_ERROR)
1216 printk("rx len error\n");
1217 if (status & RX_U_CNTRL_FRAME)
1218 printk("rx u control frame\n");
1219 if (status & RX_MISSED_FRAME)
1220 printk("rx miss\n");
1223 prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE);
1224 aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1);
1227 /* next descriptor */
1228 prxd = aup->rx_dma_ring[aup->rx_head];
1229 buff_stat = prxd->buff_stat;
1230 dev->last_rx = jiffies;
1237 * Au1000 interrupt service routine.
1239 static irqreturn_t au1000_interrupt(int irq, void *dev_id)
1241 struct net_device *dev = dev_id;
1243 /* Handle RX interrupts first to minimize chance of overrun */
1247 return IRQ_RETVAL(1);
1252 * The Tx ring has been full longer than the watchdog timeout
1253 * value. The transmitter must be hung?
1255 static void au1000_tx_timeout(struct net_device *dev)
1257 printk(KERN_ERR "%s: au1000_tx_timeout: dev=%p\n", dev->name, dev);
1260 dev->trans_start = jiffies;
1261 netif_wake_queue(dev);
1264 static void set_rx_mode(struct net_device *dev)
1266 struct au1000_private *aup = (struct au1000_private *) dev->priv;
1268 if (au1000_debug > 4)
1269 printk("%s: set_rx_mode: flags=%x\n", dev->name, dev->flags);
1271 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1272 aup->mac->control |= MAC_PROMISCUOUS;
1273 } else if ((dev->flags & IFF_ALLMULTI) ||
1274 dev->mc_count > MULTICAST_FILTER_LIMIT) {
1275 aup->mac->control |= MAC_PASS_ALL_MULTI;
1276 aup->mac->control &= ~MAC_PROMISCUOUS;
1277 printk(KERN_INFO "%s: Pass all multicast\n", dev->name);
1280 struct dev_mc_list *mclist;
1281 u32 mc_filter[2]; /* Multicast hash filter */
1283 mc_filter[1] = mc_filter[0] = 0;
1284 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1285 i++, mclist = mclist->next) {
1286 set_bit(ether_crc(ETH_ALEN, mclist->dmi_addr)>>26,
1289 aup->mac->multi_hash_high = mc_filter[1];
1290 aup->mac->multi_hash_low = mc_filter[0];
1291 aup->mac->control &= ~MAC_PROMISCUOUS;
1292 aup->mac->control |= MAC_HASH_MODE;
1296 static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1298 struct au1000_private *aup = (struct au1000_private *)dev->priv;
1300 if (!netif_running(dev)) return -EINVAL;
1302 if (!aup->phy_dev) return -EINVAL; // PHY not controllable
1304 return phy_mii_ioctl(aup->phy_dev, if_mii(rq), cmd);
1307 module_init(au1000_init_module);
1308 module_exit(au1000_cleanup_module);