This patch adds support for the Ethernet controller integrated in the
Atmel AT91RM9200 SoC processor.
Changes since the previous submission (01/02/2006) are:
- Make use of the clk.h clock infrastructure.
- The multicast hash function is not crc32. [Patch by Pedro Perez]
Signed-off-by: Andrew Victor <[EMAIL PROTECTED]>
diff -urN linux-2.6.16-git7.orig/drivers/net/arm/Kconfig
linux-2.6.16-git7/drivers/net/arm/Kconfig
--- linux-2.6.16-git7.orig/drivers/net/arm/Kconfig Mon Mar 20 11:17:12 2006
+++ linux-2.6.16-git7/drivers/net/arm/Kconfig Fri Mar 24 11:30:40 2006
@@ -31,3 +31,11 @@
help
If you have an Acorn system with one of these network cards, you
should say Y to this option if you wish to use it with Linux.
+
+config ARM_AT91_ETHER
+ tristate "AT91RM9200 Ethernet support"
+ depends on NET_ETHERNET && ARM && ARCH_AT91RM9200
+ select MII
+ help
+ If you wish to compile a kernel for the AT91RM9200 and enable
+ ethernet support, then you should always answer Y to this.
diff -urN linux-2.6.16-git7.orig/drivers/net/arm/Makefile
linux-2.6.16-git7/drivers/net/arm/Makefile
--- linux-2.6.16-git7.orig/drivers/net/arm/Makefile Mon Mar 20 11:17:12 2006
+++ linux-2.6.16-git7/drivers/net/arm/Makefile Fri Mar 24 11:30:21 2006
@@ -7,3 +7,4 @@
obj-$(CONFIG_ARM_ETHERH) += etherh.o
obj-$(CONFIG_ARM_ETHER3) += ether3.o
obj-$(CONFIG_ARM_ETHER1) += ether1.o
+obj-$(CONFIG_ARM_AT91_ETHER) += at91_ether.o
diff -urN linux-2.6.16-git7.orig/drivers/net/arm/at91_ether.c
linux-2.6.16-git7/drivers/net/arm/at91_ether.c
--- linux-2.6.16-git7.orig/drivers/net/arm/at91_ether.c Thu Jan 1 02:00:00 1970
+++ linux-2.6.16-git7/drivers/net/arm/at91_ether.c Fri Mar 24 11:30:21 2006
@@ -0,0 +1,1110 @@
+/*
+ * Ethernet driver for the Atmel AT91RM9200 (Thunder)
+ *
+ * Copyright (C) 2003 SAN People (Pty) Ltd
+ *
+ * Based on an earlier Atmel EMAC macrocell driver by Atmel and Lineo Inc.
+ * Initial version by Rick Bronson 01/11/2003
+ *
+ * Intel LXT971A PHY support by Christopher Bahns & David Knickerbocker
+ * (Polaroid Corporation)
+ *
+ * Realtek RTL8201(B)L PHY support by Roman Avramenko <[EMAIL PROTECTED]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/config.h>
+#include <linux/mii.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/dma-mapping.h>
+#include <linux/ethtool.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/at91rm9200_emac.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/board.h>
+
+#include "at91_ether.h"
+
+#define DRV_NAME "at91_ether"
+#define DRV_VERSION "1.0"
+
+static struct net_device *at91_dev;
+static struct clk *ether_clk;
+
+/* ..................................................................... */
+
+/*
+ * Read from a EMAC register.
+ */
+static inline unsigned long at91_emac_read(unsigned int reg)
+{
+ void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC;
+
+ return __raw_readl(emac_base + reg);
+}
+
+/*
+ * Write to a EMAC register.
+ */
+static inline void at91_emac_write(unsigned int reg, unsigned long value)
+{
+ void __iomem *emac_base = (void __iomem *)AT91_VA_BASE_EMAC;
+
+ __raw_writel(value, emac_base + reg);
+}
+
+/* ........................... PHY INTERFACE ........................... */
+
+/*
+ * Enable the MDIO bit in MAC control register
+ * When not called from an interrupt-handler, access to the PHY must be
+ * protected by a spinlock.
+ */
+static void enable_mdi(void)
+{
+ unsigned long ctl;
+
+ ctl = at91_emac_read(AT91_EMAC_CTL);
+ at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_MPE); /* enable
management port */
+}
+
+/*
+ * Disable the MDIO bit in the MAC control register
+ */
+static void disable_mdi(void)
+{
+ unsigned long ctl;
+
+ ctl = at91_emac_read(AT91_EMAC_CTL);
+ at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_MPE); /* disable
management port */
+}
+
+/*
+ * Wait until the PHY operation is complete.
+ */
+static inline void at91_phy_wait(void) {
+ unsigned long timeout = jiffies + 2;
+
+ while (!(at91_emac_read(AT91_EMAC_SR) & AT91_EMAC_SR_IDLE)) {
+ if (time_after(jiffies, timeout)) {
+ printk("at91_ether: MIO timeout\n");
+ break;
+ }
+ cpu_relax();
+ }
+}
+
+/*
+ * Write value to the a PHY register
+ * Note: MDI interface is assumed to already have been enabled.
+ */
+static void write_phy(unsigned char phy_addr, unsigned char address, unsigned
int value)
+{
+ at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_W
+ | ((phy_addr & 0x1f) << 23) | (address << 18) | (value &
AT91_EMAC_DATA));
+
+ /* Wait until IDLE bit in Network Status register is cleared */
+ at91_phy_wait();
+}
+
+/*
+ * Read value stored in a PHY register.
+ * Note: MDI interface is assumed to already have been enabled.
+ */
+static void read_phy(unsigned char phy_addr, unsigned char address, unsigned
int *value)
+{
+ at91_emac_write(AT91_EMAC_MAN, AT91_EMAC_MAN_802_3 | AT91_EMAC_RW_R
+ | ((phy_addr & 0x1f) << 23) | (address << 18));
+
+ /* Wait until IDLE bit in Network Status register is cleared */
+ at91_phy_wait();
+
+ *value = at91_emac_read(AT91_EMAC_MAN) & AT91_EMAC_DATA;
+}
+
+/* ........................... PHY MANAGEMENT .......................... */
+
+/*
+ * Access the PHY to determine the current link speed and mode, and update the
+ * MAC accordingly.
+ * If no link or auto-negotiation is busy, then no changes are made.
+ */
+static void update_linkspeed(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned int bmsr, bmcr, lpa, mac_cfg;
+ unsigned int speed, duplex;
+
+ if (!mii_link_ok(&lp->mii)) { /* no link */
+ netif_carrier_off(dev);
+ printk(KERN_INFO "%s: Link down.\n", dev->name);
+ return;
+ }
+
+ /* Link up, or auto-negotiation still in progress */
+ read_phy(lp->phy_address, MII_BMSR, &bmsr);
+ read_phy(lp->phy_address, MII_BMCR, &bmcr);
+ if (bmcr & BMCR_ANENABLE) { /*
AutoNegotiation is enabled */
+ if (!(bmsr & BMSR_ANEGCOMPLETE))
+ return; /* Do nothing - another
interrupt generated when negotiation complete */
+
+ read_phy(lp->phy_address, MII_LPA, &lpa);
+ if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF)) speed =
SPEED_100;
+ else speed = SPEED_10;
+ if ((lpa & LPA_100FULL) || (lpa & LPA_10FULL)) duplex =
DUPLEX_FULL;
+ else duplex = DUPLEX_HALF;
+ } else {
+ speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
+ duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
+ }
+
+ /* Update the MAC */
+ mac_cfg = at91_emac_read(AT91_EMAC_CFG) & ~(AT91_EMAC_SPD |
AT91_EMAC_FD);
+ if (speed == SPEED_100) {
+ if (duplex == DUPLEX_FULL) /* 100 Full Duplex */
+ mac_cfg |= AT91_EMAC_SPD | AT91_EMAC_FD;
+ else /* 100 Half Duplex */
+ mac_cfg |= AT91_EMAC_SPD;
+ } else {
+ if (duplex == DUPLEX_FULL) /* 10 Full Duplex */
+ mac_cfg |= AT91_EMAC_FD;
+ else {} /* 10 Half Duplex */
+ }
+ at91_emac_write(AT91_EMAC_CFG, mac_cfg);
+
+ printk(KERN_INFO "%s: Link now %i-%s\n", dev->name, speed, (duplex ==
DUPLEX_FULL) ? "FullDuplex" : "HalfDuplex");
+ netif_carrier_on(dev);
+}
+
+/*
+ * Handle interrupts from the PHY
+ */
+static irqreturn_t at91ether_phy_interrupt(int irq, void *dev_id, struct
pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned int phy;
+
+ /*
+ * This hander is triggered on both edges, but the PHY chips expect
+ * level-triggering. We therefore have to check if the PHY actually has
+ * an IRQ pending.
+ */
+ enable_mdi();
+ if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type ==
MII_DM9161A_ID)) {
+ read_phy(lp->phy_address, MII_DSINTR_REG, &phy); /* ack
interrupt in Davicom PHY */
+ if (!(phy & (1 << 0)))
+ goto done;
+ }
+ else if (lp->phy_type == MII_LXT971A_ID) {
+ read_phy(lp->phy_address, MII_ISINTS_REG, &phy); /* ack
interrupt in Intel PHY */
+ if (!(phy & (1 << 2)))
+ goto done;
+ }
+ else if (lp->phy_type == MII_BCM5221_ID) {
+ read_phy(lp->phy_address, MII_BCMINTR_REG, &phy); /* ack
interrupt in Broadcom PHY */
+ if (!(phy & (1 << 0)))
+ goto done;
+ }
+ else if (lp->phy_type == MII_KS8721_ID) {
+ read_phy(lp->phy_address, MII_TPISTATUS, &phy); /* ack
interrupt in Micrel PHY */
+ if (!(phy & ((1 << 2) | 1)))
+ goto done;
+ }
+
+ update_linkspeed(dev);
+
+done:
+ disable_mdi();
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Initialize and enable the PHY interrupt for link-state changes
+ */
+static void enable_phyirq(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned int dsintr, irq_number;
+ int status;
+
+ if (lp->phy_type == MII_RTL8201_ID) /* RTL8201 does not have an
interrupt */
+ return;
+ if (lp->phy_type == MII_DP83847_ID) /* DP83847 does not have an
interrupt */
+ return;
+ if (lp->phy_type == MII_AC101L_ID) /* AC101L interrupt not
supported yet */
+ return;
+
+ irq_number = lp->board_data.phy_irq_pin;
+ status = request_irq(irq_number, at91ether_phy_interrupt, 0, dev->name,
dev);
+ if (status) {
+ printk(KERN_ERR "at91_ether: PHY IRQ %d request failed - status
%d!\n", irq_number, status);
+ return;
+ }
+
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+
+ if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type ==
MII_DM9161A_ID)) { /* for Davicom PHY */
+ read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr);
+ dsintr = dsintr & ~0xf00; /* clear bits 8..11 */
+ write_phy(lp->phy_address, MII_DSINTR_REG, dsintr);
+ }
+ else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */
+ read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr);
+ dsintr = dsintr | 0xf2; /* set bits 1, 4..7 */
+ write_phy(lp->phy_address, MII_ISINTE_REG, dsintr);
+ }
+ else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */
+ dsintr = (1 << 15) | ( 1 << 14);
+ write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr);
+ }
+ else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */
+ dsintr = (1 << 10) | ( 1 << 8);
+ write_phy(lp->phy_address, MII_TPISTATUS, dsintr);
+ }
+
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+}
+
+/*
+ * Disable the PHY interrupt
+ */
+static void disable_phyirq(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned int dsintr;
+ unsigned int irq_number;
+
+ if (lp->phy_type == MII_RTL8201_ID) /* RTL8201 does not have an
interrupt */
+ return;
+ if (lp->phy_type == MII_DP83847_ID) /* DP83847 does not have an
interrupt */
+ return;
+ if (lp->phy_type == MII_AC101L_ID) /* AC101L interrupt not
supported yet */
+ return;
+
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+
+ if ((lp->phy_type == MII_DM9161_ID) || (lp->phy_type ==
MII_DM9161A_ID)) { /* for Davicom PHY */
+ read_phy(lp->phy_address, MII_DSINTR_REG, &dsintr);
+ dsintr = dsintr | 0xf00; /* set bits
8..11 */
+ write_phy(lp->phy_address, MII_DSINTR_REG, dsintr);
+ }
+ else if (lp->phy_type == MII_LXT971A_ID) { /* for Intel PHY */
+ read_phy(lp->phy_address, MII_ISINTE_REG, &dsintr);
+ dsintr = dsintr & ~0xf2; /* clear bits
1, 4..7 */
+ write_phy(lp->phy_address, MII_ISINTE_REG, dsintr);
+ }
+ else if (lp->phy_type == MII_BCM5221_ID) { /* for Broadcom PHY */
+ read_phy(lp->phy_address, MII_BCMINTR_REG, &dsintr);
+ dsintr = ~(1 << 14);
+ write_phy(lp->phy_address, MII_BCMINTR_REG, dsintr);
+ }
+ else if (lp->phy_type == MII_KS8721_ID) { /* for Micrel PHY */
+ read_phy(lp->phy_address, MII_TPISTATUS, &dsintr);
+ dsintr = ~((1 << 10) | (1 << 8));
+ write_phy(lp->phy_address, MII_TPISTATUS, dsintr);
+ }
+
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+
+ irq_number = lp->board_data.phy_irq_pin;
+ free_irq(irq_number, dev); /* Free interrupt
handler */
+}
+
+/*
+ * Perform a software reset of the PHY.
+ */
+#if 0
+static void reset_phy(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned int bmcr;
+
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+
+ /* Perform PHY reset */
+ write_phy(lp->phy_address, MII_BMCR, BMCR_RESET);
+
+ /* Wait until PHY reset is complete */
+ do {
+ read_phy(lp->phy_address, MII_BMCR, &bmcr);
+ } while (!(bmcr && BMCR_RESET));
+
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+}
+#endif
+
+/* ......................... ADDRESS MANAGEMENT ........................ */
+
+/*
+ * NOTE: Your bootloader must always set the MAC address correctly before
+ * booting into Linux.
+ *
+ * - It must always set the MAC address after reset, even if it doesn't
+ * happen to access the Ethernet while it's booting. Some versions of
+ * U-Boot on the AT91RM9200-DK do not do this.
+ *
+ * - Likewise it must store the addresses in the correct byte order.
+ * MicroMonitor (uMon) on the CSB337 does this incorrectly (and
+ * continues to do so, for bug-compatibility).
+ */
+
+static short __init unpack_mac_address(struct net_device *dev, unsigned int
hi, unsigned int lo)
+{
+ char addr[6];
+
+ if (machine_is_csb337()) {
+ addr[5] = (lo & 0xff); /* The CSB337
bootloader stores the MAC the wrong-way around */
+ addr[4] = (lo & 0xff00) >> 8;
+ addr[3] = (lo & 0xff0000) >> 16;
+ addr[2] = (lo & 0xff000000) >> 24;
+ addr[1] = (hi & 0xff);
+ addr[0] = (hi & 0xff00) >> 8;
+ }
+ else {
+ addr[0] = (lo & 0xff);
+ addr[1] = (lo & 0xff00) >> 8;
+ addr[2] = (lo & 0xff0000) >> 16;
+ addr[3] = (lo & 0xff000000) >> 24;
+ addr[4] = (hi & 0xff);
+ addr[5] = (hi & 0xff00) >> 8;
+ }
+
+ if (is_valid_ether_addr(addr)) {
+ memcpy(dev->dev_addr, &addr, 6);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Set the ethernet MAC address in dev->dev_addr
+ */
+static void __init get_mac_address(struct net_device *dev)
+{
+ /* Check Specific-Address 1 */
+ if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA1H),
at91_emac_read(AT91_EMAC_SA1L)))
+ return;
+ /* Check Specific-Address 2 */
+ if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA2H),
at91_emac_read(AT91_EMAC_SA2L)))
+ return;
+ /* Check Specific-Address 3 */
+ if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA3H),
at91_emac_read(AT91_EMAC_SA3L)))
+ return;
+ /* Check Specific-Address 4 */
+ if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA4H),
at91_emac_read(AT91_EMAC_SA4L)))
+ return;
+
+ printk(KERN_ERR "at91_ether: Your bootloader did not configure a MAC
address.\n");
+}
+
+/*
+ * Program the hardware MAC address from dev->dev_addr.
+ */
+static void update_mac_address(struct net_device *dev)
+{
+ at91_emac_write(AT91_EMAC_SA1L, (dev->dev_addr[3] << 24) |
(dev->dev_addr[2] << 16) | (dev->dev_addr[1] << 8) | (dev->dev_addr[0]));
+ at91_emac_write(AT91_EMAC_SA1H, (dev->dev_addr[5] << 8) |
(dev->dev_addr[4]));
+
+ at91_emac_write(AT91_EMAC_SA2L, 0);
+ at91_emac_write(AT91_EMAC_SA2H, 0);
+}
+
+/*
+ * Store the new hardware address in dev->dev_addr, and update the MAC.
+ */
+static int set_mac_address(struct net_device *dev, void* addr)
+{
+ struct sockaddr *address = addr;
+
+ if (!is_valid_ether_addr(address->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(dev->dev_addr, address->sa_data, dev->addr_len);
+ update_mac_address(dev);
+
+ printk("%s: Setting MAC address to %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->name,
+ dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+ dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+
+ return 0;
+}
+
+static int inline hash_bit_value(int bitnr, __u8 *addr)
+{
+ if (addr[bitnr / 8] & (1 << (bitnr % 8)))
+ return 1;
+ return 0;
+}
+
+/*
+ * The hash address register is 64 bits long and takes up two locations in the
memory map.
+ * The least significant bits are stored in EMAC_HSL and the most significant
+ * bits in EMAC_HSH.
+ *
+ * The unicast hash enable and the multicast hash enable bits in the network
configuration
+ * register enable the reception of hash matched frames. The destination
address is
+ * reduced to a 6 bit index into the 64 bit hash register using the following
hash function.
+ * The hash function is an exclusive or of every sixth bit of the destination
address.
+ * hash_index[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^
da[41] ^ da[47]
+ * hash_index[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^
da[40] ^ da[46]
+ * hash_index[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^
da[39] ^ da[45]
+ * hash_index[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^
da[38] ^ da[44]
+ * hash_index[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^
da[37] ^ da[43]
+ * hash_index[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^
da[36] ^ da[42]
+ * da[0] represents the least significant bit of the first byte received, that
is, the multicast/
+ * unicast indicator, and da[47] represents the most significant bit of the
last byte
+ * received.
+ * If the hash index points to a bit that is set in the hash register then the
frame will be
+ * matched according to whether the frame is multicast or unicast.
+ * A multicast match will be signalled if the multicast hash enable bit is
set, da[0] is 1 and
+ * the hash index points to a bit set in the hash register.
+ * A unicast match will be signalled if the unicast hash enable bit is set,
da[0] is 0 and the
+ * hash index points to a bit set in the hash register.
+ * To receive all multicast frames, the hash register should be set with all
ones and the
+ * multicast hash enable bit should be set in the network configuration
register.
+ */
+
+/*
+ * Return the hash index value for the specified address.
+ */
+static int hash_get_index(__u8 *addr)
+{
+ int i, j, bitval;
+ int hash_index = 0;
+
+ for (j = 0; j < 6; j++) {
+ for (i = 0, bitval = 0; i < 8; i++)
+ bitval ^= hash_bit_value(i*6 + j, addr);
+
+ hash_index |= (bitval << j);
+ }
+
+ return hash_index;
+}
+
+/*
+ * Add multicast addresses to the internal multicast-hash table.
+ */
+static void at91ether_sethashtable(struct net_device *dev)
+{
+ struct dev_mc_list *curr;
+ unsigned long mc_filter[2];
+ unsigned int i, bitnr;
+
+ mc_filter[0] = mc_filter[1] = 0;
+
+ curr = dev->mc_list;
+ for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
+ if (!curr) break; /* unexpected end of list */
+
+ bitnr = hash_get_index(curr->dmi_addr);
+ mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
+ }
+
+ at91_emac_write(AT91_EMAC_HSH, mc_filter[0]);
+ at91_emac_write(AT91_EMAC_HSL, mc_filter[1]);
+}
+
+/*
+ * Enable/Disable promiscuous and multicast modes.
+ */
+static void at91ether_set_rx_mode(struct net_device *dev)
+{
+ unsigned long cfg;
+
+ cfg = at91_emac_read(AT91_EMAC_CFG);
+
+ if (dev->flags & IFF_PROMISC) /* Enable promiscuous
mode */
+ cfg |= AT91_EMAC_CAF;
+ else if (dev->flags & (~IFF_PROMISC)) /* Disable promiscuous
mode */
+ cfg &= ~AT91_EMAC_CAF;
+
+ if (dev->flags & IFF_ALLMULTI) { /* Enable all multicast
mode */
+ at91_emac_write(AT91_EMAC_HSH, -1);
+ at91_emac_write(AT91_EMAC_HSL, -1);
+ cfg |= AT91_EMAC_MTI;
+ } else if (dev->mc_count > 0) { /* Enable specific
multicasts */
+ at91ether_sethashtable(dev);
+ cfg |= AT91_EMAC_MTI;
+ } else if (dev->flags & (~IFF_ALLMULTI)) { /* Disable all
multicast mode */
+ at91_emac_write(AT91_EMAC_HSH, 0);
+ at91_emac_write(AT91_EMAC_HSL, 0);
+ cfg &= ~AT91_EMAC_MTI;
+ }
+
+ at91_emac_write(AT91_EMAC_CFG, cfg);
+}
+
+
+/* ......................... ETHTOOL SUPPORT ........................... */
+
+
+static int mdio_read(struct net_device *dev, int phy_id, int location)
+{
+ unsigned int value;
+
+ read_phy(phy_id, location, &value);
+ return value;
+}
+
+static void mdio_write(struct net_device *dev, int phy_id, int location, int
value)
+{
+ write_phy(phy_id, location, value);
+}
+
+static int at91ether_get_settings(struct net_device *dev, struct ethtool_cmd
*cmd)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ int ret;
+
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+
+ ret = mii_ethtool_gset(&lp->mii, cmd);
+
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+
+ if (lp->phy_media == PORT_FIBRE) { /* override media type
since mii.c doesn't know */
+ cmd->supported = SUPPORTED_FIBRE;
+ cmd->port = PORT_FIBRE;
+ }
+
+ return ret;
+}
+
+static int at91ether_set_settings(struct net_device *dev, struct ethtool_cmd
*cmd)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ int ret;
+
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+
+ ret = mii_ethtool_sset(&lp->mii, cmd);
+
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+
+ return ret;
+}
+
+static int at91ether_nwayreset(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ int ret;
+
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+
+ ret = mii_nway_restart(&lp->mii);
+
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+
+ return ret;
+}
+
+static void at91ether_get_drvinfo(struct net_device *dev, struct
ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ strlcpy(info->bus_info, dev->class_dev.dev->bus_id,
sizeof(info->bus_info));
+}
+
+static struct ethtool_ops at91ether_ethtool_ops = {
+ .get_settings = at91ether_get_settings,
+ .set_settings = at91ether_set_settings,
+ .get_drvinfo = at91ether_get_drvinfo,
+ .nway_reset = at91ether_nwayreset,
+ .get_link = ethtool_op_get_link,
+};
+
+
+/* ................................ MAC ................................ */
+
+/*
+ * Initialize and start the Receiver and Transmit subsystems
+ */
+static void at91ether_start(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ struct recv_desc_bufs *dlist, *dlist_phys;
+ int i;
+ unsigned long ctl;
+
+ dlist = lp->dlist;
+ dlist_phys = lp->dlist_phys;
+
+ for (i = 0; i < MAX_RX_DESCR; i++) {
+ dlist->descriptors[i].addr = (unsigned int)
&dlist_phys->recv_buf[i][0];
+ dlist->descriptors[i].size = 0;
+ }
+
+ /* Set the Wrap bit on the last descriptor */
+ dlist->descriptors[i-1].addr |= EMAC_DESC_WRAP;
+
+ /* Reset buffer index */
+ lp->rxBuffIndex = 0;
+
+ /* Program address of descriptor list in Rx Buffer Queue register */
+ at91_emac_write(AT91_EMAC_RBQP, (unsigned long) dlist_phys);
+
+ /* Enable Receive and Transmit */
+ ctl = at91_emac_read(AT91_EMAC_CTL);
+ at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE | AT91_EMAC_TE);
+}
+
+/*
+ * Open the ethernet interface
+ */
+static int at91ether_open(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned long ctl;
+
+ if (!is_valid_ether_addr(dev->dev_addr))
+ return -EADDRNOTAVAIL;
+
+ clk_enable(ether_clk); /* Re-enable Peripheral clock */
+
+ /* Clear internal statistics */
+ ctl = at91_emac_read(AT91_EMAC_CTL);
+ at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_CSR);
+
+ /* Update the MAC address (incase user has changed it) */
+ update_mac_address(dev);
+
+ /* Enable PHY interrupt */
+ enable_phyirq(dev);
+
+ /* Enable MAC interrupts */
+ at91_emac_write(AT91_EMAC_IER, AT91_EMAC_RCOM | AT91_EMAC_RBNA
+ | AT91_EMAC_TUND | AT91_EMAC_RTRY |
AT91_EMAC_TCOM
+ | AT91_EMAC_ROVR | AT91_EMAC_ABT);
+
+ /* Determine current link speed */
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+ update_linkspeed(dev);
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+
+ at91ether_start(dev);
+ netif_start_queue(dev);
+ return 0;
+}
+
+/*
+ * Close the interface
+ */
+static int at91ether_close(struct net_device *dev)
+{
+ unsigned long ctl;
+
+ /* Disable Receiver and Transmitter */
+ ctl = at91_emac_read(AT91_EMAC_CTL);
+ at91_emac_write(AT91_EMAC_CTL, ctl & ~(AT91_EMAC_TE | AT91_EMAC_RE));
+
+ /* Disable PHY interrupt */
+ disable_phyirq(dev);
+
+ /* Disable MAC interrupts */
+ at91_emac_write(AT91_EMAC_IDR, AT91_EMAC_RCOM | AT91_EMAC_RBNA
+ | AT91_EMAC_TUND | AT91_EMAC_RTRY |
AT91_EMAC_TCOM
+ | AT91_EMAC_ROVR | AT91_EMAC_ABT);
+
+ netif_stop_queue(dev);
+
+ clk_disable(ether_clk); /* Disable Peripheral clock */
+
+ return 0;
+}
+
+/*
+ * Transmit packet.
+ */
+static int at91ether_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+
+ if (at91_emac_read(AT91_EMAC_TSR) & AT91_EMAC_TSR_BNQ) {
+ netif_stop_queue(dev);
+
+ /* Store packet information (to free when Tx completed) */
+ lp->skb = skb;
+ lp->skb_length = skb->len;
+ lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len,
DMA_TO_DEVICE);
+ lp->stats.tx_bytes += skb->len;
+
+ /* Set address of the data in the Transmit Address register */
+ at91_emac_write(AT91_EMAC_TAR, lp->skb_physaddr);
+ /* Set length of the packet in the Transmit Control register */
+ at91_emac_write(AT91_EMAC_TCR, skb->len);
+
+ dev->trans_start = jiffies;
+ } else {
+ printk(KERN_ERR "at91_ether.c: at91ether_tx() called, but
device is busy!\n");
+ return 1; /* if we return anything but zero, dev.c:1055
calls kfree_skb(skb)
+ on this skb, he also reports -ENETDOWN and
printk's, so either
+ we free and return(0) or don't free and return
1 */
+ }
+
+ return 0;
+}
+
+/*
+ * Update the current statistics from the internal statistics registers.
+ */
+static struct net_device_stats *at91ether_stats(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ int ale, lenerr, seqe, lcol, ecol;
+
+ if (netif_running(dev)) {
+ lp->stats.rx_packets += at91_emac_read(AT91_EMAC_OK);
/* Good frames received */
+ ale = at91_emac_read(AT91_EMAC_ALE);
+ lp->stats.rx_frame_errors += ale;
/* Alignment errors */
+ lenerr = at91_emac_read(AT91_EMAC_ELR) +
at91_emac_read(AT91_EMAC_USF);
+ lp->stats.rx_length_errors += lenerr;
/* Excessive Length or Undersize Frame error */
+ seqe = at91_emac_read(AT91_EMAC_SEQE);
+ lp->stats.rx_crc_errors += seqe;
/* CRC error */
+ lp->stats.rx_fifo_errors += at91_emac_read(AT91_EMAC_DRFC);
/* Receive buffer not available */
+ lp->stats.rx_errors += (ale + lenerr + seqe
+ + at91_emac_read(AT91_EMAC_CDE) +
at91_emac_read(AT91_EMAC_RJB));
+
+ lp->stats.tx_packets += at91_emac_read(AT91_EMAC_FRA);
/* Frames successfully transmitted */
+ lp->stats.tx_fifo_errors += at91_emac_read(AT91_EMAC_TUE);
/* Transmit FIFO underruns */
+ lp->stats.tx_carrier_errors += at91_emac_read(AT91_EMAC_CSE);
/* Carrier Sense errors */
+ lp->stats.tx_heartbeat_errors +=
at91_emac_read(AT91_EMAC_SQEE);/* Heartbeat error */
+
+ lcol = at91_emac_read(AT91_EMAC_LCOL);
+ ecol = at91_emac_read(AT91_EMAC_ECOL);
+ lp->stats.tx_window_errors += lcol; /* Late
collisions */
+ lp->stats.tx_aborted_errors += ecol; /* 16
collisions */
+
+ lp->stats.collisions += (at91_emac_read(AT91_EMAC_SCOL) +
at91_emac_read(AT91_EMAC_MCOL) + lcol + ecol);
+ }
+ return &lp->stats;
+}
+
+/*
+ * Extract received frame from buffer descriptors and sent to upper layers.
+ * (Called from interrupt context)
+ */
+static void at91ether_rx(struct net_device *dev)
+{
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ struct recv_desc_bufs *dlist;
+ unsigned char *p_recv;
+ struct sk_buff *skb;
+ unsigned int pktlen;
+
+ dlist = lp->dlist;
+ while (dlist->descriptors[lp->rxBuffIndex].addr & EMAC_DESC_DONE) {
+ p_recv = dlist->recv_buf[lp->rxBuffIndex];
+ pktlen = dlist->descriptors[lp->rxBuffIndex].size & 0x7ff;
/* Length of frame including FCS */
+ skb = alloc_skb(pktlen + 2, GFP_ATOMIC);
+ if (skb != NULL) {
+ skb_reserve(skb, 2);
+ memcpy(skb_put(skb, pktlen), p_recv, pktlen);
+
+ skb->dev = dev;
+ skb->protocol = eth_type_trans(skb, dev);
+ skb->len = pktlen;
+ dev->last_rx = jiffies;
+ lp->stats.rx_bytes += pktlen;
+ netif_rx(skb);
+ }
+ else {
+ lp->stats.rx_dropped += 1;
+ printk(KERN_NOTICE "%s: Memory squeeze, dropping
packet.\n", dev->name);
+ }
+
+ if (dlist->descriptors[lp->rxBuffIndex].size & EMAC_MULTICAST)
+ lp->stats.multicast++;
+
+ dlist->descriptors[lp->rxBuffIndex].addr &= ~EMAC_DESC_DONE;
/* reset ownership bit */
+ if (lp->rxBuffIndex == MAX_RX_DESCR-1)
/* wrap after last buffer */
+ lp->rxBuffIndex = 0;
+ else
+ lp->rxBuffIndex++;
+ }
+}
+
+/*
+ * MAC interrupt handler
+ */
+static irqreturn_t at91ether_interrupt(int irq, void *dev_id, struct pt_regs
*regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct at91_private *lp = (struct at91_private *) dev->priv;
+ unsigned long intstatus, ctl;
+
+ /* MAC Interrupt Status register indicates what interrupts are pending.
+ It is automatically cleared once read. */
+ intstatus = at91_emac_read(AT91_EMAC_ISR);
+
+ if (intstatus & AT91_EMAC_RCOM) /* Receive complete */
+ at91ether_rx(dev);
+
+ if (intstatus & AT91_EMAC_TCOM) { /* Transmit complete */
+ /* The TCOM bit is set even if the transmission failed. */
+ if (intstatus & (AT91_EMAC_TUND | AT91_EMAC_RTRY))
+ lp->stats.tx_errors += 1;
+
+ if (lp->skb) {
+ dev_kfree_skb_irq(lp->skb);
+ lp->skb = NULL;
+ dma_unmap_single(NULL, lp->skb_physaddr,
lp->skb_length, DMA_TO_DEVICE);
+ }
+ netif_wake_queue(dev);
+ }
+
+ /* Work-around for Errata #11 */
+ if (intstatus & AT91_EMAC_RBNA) {
+ ctl = at91_emac_read(AT91_EMAC_CTL);
+ at91_emac_write(AT91_EMAC_CTL, ctl & ~AT91_EMAC_RE);
+ at91_emac_write(AT91_EMAC_CTL, ctl | AT91_EMAC_RE);
+ }
+
+ if (intstatus & AT91_EMAC_ROVR)
+ printk("%s: ROVR error\n", dev->name);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Initialize the ethernet interface
+ */
+static int __init at91ether_setup(unsigned long phy_type, unsigned short
phy_address, struct platform_device *pdev)
+{
+ struct at91_eth_data *board_data = pdev->dev.platform_data;
+ struct net_device *dev;
+ struct at91_private *lp;
+ unsigned int val;
+ int res;
+
+ if (at91_dev) /* already initialized */
+ return 0;
+
+ dev = alloc_etherdev(sizeof(struct at91_private));
+ if (!dev)
+ return -ENOMEM;
+
+ dev->base_addr = AT91_VA_BASE_EMAC;
+ dev->irq = AT91_ID_EMAC;
+ SET_MODULE_OWNER(dev);
+
+ /* Install the interrupt handler */
+ if (request_irq(dev->irq, at91ether_interrupt, 0, dev->name, dev)) {
+ free_netdev(dev);
+ return -EBUSY;
+ }
+
+ /* Allocate memory for DMA Receive descriptors */
+ lp = (struct at91_private *)dev->priv;
+ lp->dlist = (struct recv_desc_bufs *) dma_alloc_coherent(NULL,
sizeof(struct recv_desc_bufs), (dma_addr_t *) &lp->dlist_phys, GFP_KERNEL);
+ if (lp->dlist == NULL) {
+ free_irq(dev->irq, dev);
+ free_netdev(dev);
+ return -ENOMEM;
+ }
+ lp->board_data = *board_data;
+ platform_set_drvdata(pdev, dev);
+
+ spin_lock_init(&lp->lock);
+
+ ether_setup(dev);
+ dev->open = at91ether_open;
+ dev->stop = at91ether_close;
+ dev->hard_start_xmit = at91ether_tx;
+ dev->get_stats = at91ether_stats;
+ dev->set_multicast_list = at91ether_set_rx_mode;
+ dev->set_mac_address = set_mac_address;
+ dev->ethtool_ops = &at91ether_ethtool_ops;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ get_mac_address(dev); /* Get ethernet address and store it in
dev->dev_addr */
+ update_mac_address(dev); /* Program ethernet address into MAC */
+
+ at91_emac_write(AT91_EMAC_CTL, 0);
+
+ if (lp->board_data.is_rmii)
+ at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 |
AT91_EMAC_BIG | AT91_EMAC_RMII);
+ else
+ at91_emac_write(AT91_EMAC_CFG, AT91_EMAC_CLK_DIV32 |
AT91_EMAC_BIG);
+
+ /* Perform PHY-specific initialization */
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+ if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) {
+ read_phy(phy_address, MII_DSCR_REG, &val);
+ if ((val & (1 << 10)) == 0) /* DSCR bit 10
is 0 -- fiber mode */
+ lp->phy_media = PORT_FIBRE;
+ } else if (machine_is_csb337()) {
+ /* mix link activity status into LED2 link state */
+ write_phy(phy_address, MII_LEDCTRL_REG, 0x0d22);
+ }
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+
+ lp->mii.dev = dev; /* Support for ethtool */
+ lp->mii.mdio_read = mdio_read;
+ lp->mii.mdio_write = mdio_write;
+
+ lp->phy_type = phy_type; /* Type of PHY connected */
+ lp->phy_address = phy_address; /* MDI address of PHY */
+
+ /* Register the network interface */
+ res = register_netdev(dev);
+ if (res) {
+ free_irq(dev->irq, dev);
+ free_netdev(dev);
+ dma_free_coherent(NULL, sizeof(struct recv_desc_bufs),
lp->dlist, (dma_addr_t)lp->dlist_phys);
+ return res;
+ }
+ at91_dev = dev;
+
+ /* Determine current link speed */
+ spin_lock_irq(&lp->lock);
+ enable_mdi();
+ update_linkspeed(dev);
+ disable_mdi();
+ spin_unlock_irq(&lp->lock);
+ netif_carrier_off(dev); /* will be enabled in open() */
+
+ /* Display ethernet banner */
+ printk(KERN_INFO "%s: AT91 ethernet at 0x%08x int=%d %s%s
(%02x:%02x:%02x:%02x:%02x:%02x)\n",
+ dev->name, (uint) dev->base_addr, dev->irq,
+ at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_SPD ? "100-" : "10-",
+ at91_emac_read(AT91_EMAC_CFG) & AT91_EMAC_FD ? "FullDuplex" :
"HalfDuplex",
+ dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+ dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+ if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID))
+ printk(KERN_INFO "%s: Davicom 9196 PHY %s\n", dev->name,
(lp->phy_media == PORT_FIBRE) ? "(Fiber)" : "(Copper)");
+ else if (phy_type == MII_LXT971A_ID)
+ printk(KERN_INFO "%s: Intel LXT971A PHY\n", dev->name);
+ else if (phy_type == MII_RTL8201_ID)
+ printk(KERN_INFO "%s: Realtek RTL8201(B)L PHY\n", dev->name);
+ else if (phy_type == MII_BCM5221_ID)
+ printk(KERN_INFO "%s: Broadcom BCM5221 PHY\n", dev->name);
+ else if (phy_type == MII_DP83847_ID)
+ printk(KERN_INFO "%s: National Semiconductor DP83847 PHY\n",
dev->name);
+ else if (phy_type == MII_AC101L_ID)
+ printk(KERN_INFO "%s: Altima AC101L PHY\n", dev->name);
+ else if (phy_type == MII_KS8721_ID)
+ printk(KERN_INFO "%s: Micrel KS8721 PHY\n", dev->name);
+
+ return 0;
+}
+
+/*
+ * Detect MAC and PHY and perform initialization
+ */
+static int __init at91ether_probe(struct platform_device *pdev)
+{
+ unsigned int phyid1, phyid2;
+ int detected = -1;
+ unsigned long phy_id;
+ unsigned short phy_address = 0;
+
+ ether_clk = clk_get(&pdev->dev, "ether_clk");
+ if (!ether_clk) {
+ printk(KERN_ERR "at91_ether: no clock defined\n");
+ return -ENODEV;
+ }
+ clk_enable(ether_clk); /* Enable
Peripheral clock */
+
+ while ((detected != 0) && (phy_address < 32)) {
+ /* Read the PHY ID registers */
+ enable_mdi();
+ read_phy(phy_address, MII_PHYSID1, &phyid1);
+ read_phy(phy_address, MII_PHYSID2, &phyid2);
+ disable_mdi();
+
+ phy_id = (phyid1 << 16) | (phyid2 & 0xfff0);
+ switch (phy_id) {
+ case MII_DM9161_ID: /* Davicom 9161:
PHY_ID1 = 0x181, PHY_ID2 = B881 */
+ case MII_DM9161A_ID: /* Davicom 9161A:
PHY_ID1 = 0x181, PHY_ID2 = B8A0 */
+ case MII_LXT971A_ID: /* Intel LXT971A:
PHY_ID1 = 0x13, PHY_ID2 = 78E0 */
+ case MII_RTL8201_ID: /* Realtek RTL8201:
PHY_ID1 = 0, PHY_ID2 = 0x8201 */
+ case MII_BCM5221_ID: /* Broadcom BCM5221:
PHY_ID1 = 0x40, PHY_ID2 = 0x61e0 */
+ case MII_DP83847_ID: /* National
Semiconductor DP83847: */
+ case MII_AC101L_ID: /* Altima AC101L:
PHY_ID1 = 0x22, PHY_ID2 = 0x5520 */
+ case MII_KS8721_ID: /* Micrel KS8721:
PHY_ID1 = 0x22, PHY_ID2 = 0x1610 */
+ detected = at91ether_setup(phy_id, phy_address,
pdev);
+ break;
+ }
+
+ phy_address++;
+ }
+
+ clk_disable(ether_clk); /* Disable
Peripheral clock */
+
+ return detected;
+}
+
+static int __devexit at91ether_remove(struct platform_device *pdev)
+{
+ struct at91_private *lp = (struct at91_private *) at91_dev->priv;
+
+ unregister_netdev(at91_dev);
+ free_irq(at91_dev->irq, at91_dev);
+ dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist,
(dma_addr_t)lp->dlist_phys);
+ clk_put(ether_clk);
+
+ free_netdev(at91_dev);
+ at91_dev = NULL;
+ return 0;
+}
+
+static struct platform_driver at91ether_driver = {
+ .probe = at91ether_probe,
+ .remove = __devexit_p(at91ether_remove),
+ /* FIXME: support suspend and resume */
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init at91ether_init(void)
+{
+ return platform_driver_register(&at91ether_driver);
+}
+
+static void __exit at91ether_exit(void)
+{
+ platform_driver_unregister(&at91ether_driver);
+}
+
+module_init(at91ether_init)
+module_exit(at91ether_exit)
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("AT91RM9200 EMAC Ethernet driver");
+MODULE_AUTHOR("Andrew Victor");
diff -urN linux-2.6.16-git7.orig/drivers/net/arm/at91_ether.h
linux-2.6.16-git7/drivers/net/arm/at91_ether.h
--- linux-2.6.16-git7.orig/drivers/net/arm/at91_ether.h Thu Jan 1 02:00:00 1970
+++ linux-2.6.16-git7/drivers/net/arm/at91_ether.h Fri Mar 24 11:30:21 2006
@@ -0,0 +1,101 @@
+/*
+ * Ethernet driver for the Atmel AT91RM9200 (Thunder)
+ *
+ * Copyright (C) SAN People (Pty) Ltd
+ *
+ * Based on an earlier Atmel EMAC macrocell driver by Atmel and Lineo Inc.
+ * Initial version by Rick Bronson.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef AT91_ETHERNET
+#define AT91_ETHERNET
+
+
+/* Davicom 9161 PHY */
+#define MII_DM9161_ID 0x0181b880
+#define MII_DM9161A_ID 0x0181b8a0
+
+/* Davicom specific registers */
+#define MII_DSCR_REG 16
+#define MII_DSCSR_REG 17
+#define MII_DSINTR_REG 21
+
+/* Intel LXT971A PHY */
+#define MII_LXT971A_ID 0x001378E0
+
+/* Intel specific registers */
+#define MII_ISINTE_REG 18
+#define MII_ISINTS_REG 19
+#define MII_LEDCTRL_REG 20
+
+/* Realtek RTL8201 PHY */
+#define MII_RTL8201_ID 0x00008200
+
+/* Broadcom BCM5221 PHY */
+#define MII_BCM5221_ID 0x004061e0
+
+/* Broadcom specific registers */
+#define MII_BCMINTR_REG 26
+
+/* National Semiconductor DP83847 */
+#define MII_DP83847_ID 0x20005c30
+
+/* Altima AC101L PHY */
+#define MII_AC101L_ID 0x00225520
+
+/* Micrel KS8721 PHY */
+#define MII_KS8721_ID 0x00221610
+
+/* ........................................................................ */
+
+#define MAX_RBUFF_SZ 0x600 /* 1518 rounded up */
+#define MAX_RX_DESCR 9 /* max number of receive buffers */
+
+#define EMAC_DESC_DONE 0x00000001 /* bit for if DMA is done */
+#define EMAC_DESC_WRAP 0x00000002 /* bit for wrap */
+
+#define EMAC_BROADCAST 0x80000000 /* broadcast address */
+#define EMAC_MULTICAST 0x40000000 /* multicast address */
+#define EMAC_UNICAST 0x20000000 /* unicast address */
+
+struct rbf_t
+{
+ unsigned int addr;
+ unsigned long size;
+};
+
+struct recv_desc_bufs
+{
+ struct rbf_t descriptors[MAX_RX_DESCR]; /* must be on sizeof
(rbf_t) boundary */
+ char recv_buf[MAX_RX_DESCR][MAX_RBUFF_SZ]; /* must be on long
boundary */
+};
+
+struct at91_private
+{
+ struct net_device_stats stats;
+ struct mii_if_info mii; /* ethtool support */
+ struct at91_eth_data board_data; /* board-specific configuration
*/
+
+ /* PHY */
+ unsigned long phy_type; /* type of PHY (PHY_ID) */
+ spinlock_t lock; /* lock for MDI interface */
+ short phy_media; /* media interface type */
+ unsigned short phy_address; /* 5-bit MDI address of PHY
(0..31) */
+
+ /* Transmit */
+ struct sk_buff *skb; /* holds skb until xmit
interrupt completes */
+ dma_addr_t skb_physaddr; /* phys addr from
pci_map_single */
+ int skb_length; /* saved skb length for
pci_unmap_single */
+
+ /* Receive */
+ int rxBuffIndex; /* index into receive
descriptor list */
+ struct recv_desc_bufs *dlist; /* descriptor list address */
+ struct recv_desc_bufs *dlist_phys; /* descriptor list physical
address */
+};
+
+#endif
diff -urN
linux-2.6.16-git7.orig/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
linux-2.6.16-git7/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
--- linux-2.6.16-git7.orig/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
Thu Jan 1 02:00:00 1970
+++ linux-2.6.16-git7/include/asm-arm/arch-at91rm9200/at91rm9200_emac.h Fri Mar
24 11:30:21 2006
@@ -0,0 +1,138 @@
+/*
+ * include/asm-arm/arch-at91rm9200/at91rm9200_emac.h
+ *
+ * Copyright (C) 2005 Ivan Kokshaysky
+ * Copyright (C) SAN People
+ *
+ * Ethernet MAC registers.
+ * Based on AT91RM9200 datasheet revision E.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef AT91RM9200_EMAC_H
+#define AT91RM9200_EMAC_H
+
+#define AT91_EMAC_CTL 0x00 /* Control Register */
+#define AT91_EMAC_LB (1 << 0) /* Loopback */
+#define AT91_EMAC_LBL (1 << 1) /* Loopback
Local */
+#define AT91_EMAC_RE (1 << 2) /* Receive
Enable */
+#define AT91_EMAC_TE (1 << 3) /* Transmit
Enable */
+#define AT91_EMAC_MPE (1 << 4) /* Management
Port Enable */
+#define AT91_EMAC_CSR (1 << 5) /* Clear
Statistics Registers */
+#define AT91_EMAC_INCSTAT (1 << 6) /* Increment
Statistics Registers */
+#define AT91_EMAC_WES (1 << 7) /* Write Enable
for Statistics Registers */
+#define AT91_EMAC_BP (1 << 8) /* Back
Pressure */
+
+#define AT91_EMAC_CFG 0x04 /* Configuration Register */
+#define AT91_EMAC_SPD (1 << 0) /* Speed */
+#define AT91_EMAC_FD (1 << 1) /* Full Duplex
*/
+#define AT91_EMAC_BR (1 << 2) /* Bit Rate */
+#define AT91_EMAC_CAF (1 << 4) /* Copy All
Frames */
+#define AT91_EMAC_NBC (1 << 5) /* No Broadcast
*/
+#define AT91_EMAC_MTI (1 << 6) /* Multicast
Hash Enable */
+#define AT91_EMAC_UNI (1 << 7) /* Unicast Hash
Enable */
+#define AT91_EMAC_BIG (1 << 8) /* Receive 1522
Bytes */
+#define AT91_EMAC_EAE (1 << 9) /* External
Address Match Enable */
+#define AT91_EMAC_CLK (3 << 10) /* MDC Clock
Divisor */
+#define AT91_EMAC_CLK_DIV8 (0 << 10)
+#define AT91_EMAC_CLK_DIV16 (1 << 10)
+#define AT91_EMAC_CLK_DIV32 (2 << 10)
+#define AT91_EMAC_CLK_DIV64 (3 << 10)
+#define AT91_EMAC_RTY (1 << 12) /* Retry Test */
+#define AT91_EMAC_RMII (1 << 13) /* Reduce MII
(RMII) */
+
+#define AT91_EMAC_SR 0x08 /* Status Register */
+#define AT91_EMAC_SR_LINK (1 << 0) /* Link */
+#define AT91_EMAC_SR_MDIO (1 << 1) /* MDIO pin */
+#define AT91_EMAC_SR_IDLE (1 << 2) /* PHY idle */
+
+#define AT91_EMAC_TAR 0x0c /* Transmit Address Register */
+
+#define AT91_EMAC_TCR 0x10 /* Transmit Control Register */
+#define AT91_EMAC_LEN (0x7ff << 0) /* Transmit
Frame Length */
+#define AT91_EMAC_NCRC (1 << 15) /* No CRC */
+
+#define AT91_EMAC_TSR 0x14 /* Transmit Status Register */
+#define AT91_EMAC_TSR_OVR (1 << 0) /* Transmit
Buffer Overrun */
+#define AT91_EMAC_TSR_COL (1 << 1) /* Collision
Occurred */
+#define AT91_EMAC_TSR_RLE (1 << 2) /* Retry Limit
Exceeded */
+#define AT91_EMAC_TSR_IDLE (1 << 3) /* Transmitter
Idle */
+#define AT91_EMAC_TSR_BNQ (1 << 4) /* Transmit
Buffer not Queued */
+#define AT91_EMAC_TSR_COMP (1 << 5) /* Transmit
Complete */
+#define AT91_EMAC_TSR_UND (1 << 6) /* Transmit
Underrun */
+
+#define AT91_EMAC_RBQP 0x18 /* Receive Buffer Queue Pointer
*/
+
+#define AT91_EMAC_RSR 0x20 /* Receive Status Register */
+#define AT91_EMAC_RSR_BNA (1 << 0) /* Buffer Not
Available */
+#define AT91_EMAC_RSR_REC (1 << 1) /* Frame
Received */
+#define AT91_EMAC_RSR_OVR (1 << 2) /* RX Overrun */
+
+#define AT91_EMAC_ISR 0x24 /* Interrupt Status Register */
+#define AT91_EMAC_DONE (1 << 0) /* Management
Done */
+#define AT91_EMAC_RCOM (1 << 1) /* Receive
Complete */
+#define AT91_EMAC_RBNA (1 << 2) /* Receive
Buffer Not Available */
+#define AT91_EMAC_TOVR (1 << 3) /* Transmit
Buffer Overrun */
+#define AT91_EMAC_TUND (1 << 4) /* Transmit
Buffer Underrun */
+#define AT91_EMAC_RTRY (1 << 5) /* Retry Limit
*/
+#define AT91_EMAC_TBRE (1 << 6) /* Transmit
Buffer Register Empty */
+#define AT91_EMAC_TCOM (1 << 7) /* Transmit
Complete */
+#define AT91_EMAC_TIDLE (1 << 8) /* Transmit
Idle */
+#define AT91_EMAC_LINK (1 << 9) /* Link */
+#define AT91_EMAC_ROVR (1 << 10) /* RX Overrun */
+#define AT91_EMAC_ABT (1 << 11) /* Abort */
+
+#define AT91_EMAC_IER 0x28 /* Interrupt Enable Register */
+#define AT91_EMAC_IDR 0x2c /* Interrupt Disable Register */
+#define AT91_EMAC_IMR 0x30 /* Interrupt Mask Register */
+
+#define AT91_EMAC_MAN 0x34 /* PHY Maintenance Register */
+#define AT91_EMAC_DATA (0xffff << 0) /* MDIO Data */
+#define AT91_EMAC_REGA (0x1f << 18) /* MDIO
Register */
+#define AT91_EMAC_PHYA (0x1f << 23) /* MDIO PHY
Address */
+#define AT91_EMAC_RW (3 << 28) /* Read/Write
operation */
+#define AT91_EMAC_RW_W (1 << 28)
+#define AT91_EMAC_RW_R (2 << 28)
+#define AT91_EMAC_MAN_802_3 0x40020000 /* IEEE 802.3
value */
+
+/*
+ * Statistics Registers.
+ */
+#define AT91_EMAC_FRA 0x40 /* Frames Transmitted OK */
+#define AT91_EMAC_SCOL 0x44 /* Single Collision Frame */
+#define AT91_EMAC_MCOL 0x48 /* Multiple Collision Frame */
+#define AT91_EMAC_OK 0x4c /* Frames Received OK */
+#define AT91_EMAC_SEQE 0x50 /* Frame Check Sequence Error */
+#define AT91_EMAC_ALE 0x54 /* Alignmemt Error */
+#define AT91_EMAC_DTE 0x58 /* Deffered Transmission Frame */
+#define AT91_EMAC_LCOL 0x5c /* Late Collision */
+#define AT91_EMAC_ECOL 0x60 /* Excessive Collision */
+#define AT91_EMAC_TUE 0x64 /* Transmit Underrun Error */
+#define AT91_EMAC_CSE 0x68 /* Carrier Sense Error */
+#define AT91_EMAC_DRFC 0x6c /* Discard RX Frame */
+#define AT91_EMAC_ROV 0x70 /* Receive Overrun */
+#define AT91_EMAC_CDE 0x74 /* Code Error */
+#define AT91_EMAC_ELR 0x78 /* Excessive Length Error */
+#define AT91_EMAC_RJB 0x7c /* Receive Jabber */
+#define AT91_EMAC_USF 0x80 /* Undersize Frame */
+#define AT91_EMAC_SQEE 0x84 /* SQE Test Error */
+
+/*
+ * Address Registers.
+ */
+#define AT91_EMAC_HSL 0x90 /* Hash Address Low [31:0] */
+#define AT91_EMAC_HSH 0x94 /* Hash Address High [63:32] */
+#define AT91_EMAC_SA1L 0x98 /* Specific Address 1 Low, bytes 0-3 */
+#define AT91_EMAC_SA1H 0x9c /* Specific Address 1 High, bytes 4-5 */
+#define AT91_EMAC_SA2L 0xa0 /* Specific Address 2 Low, bytes 0-3 */
+#define AT91_EMAC_SA2H 0xa4 /* Specific Address 2 High, bytes 4-5 */
+#define AT91_EMAC_SA3L 0xa8 /* Specific Address 3 Low, bytes 0-3 */
+#define AT91_EMAC_SA3H 0xac /* Specific Address 3 High, bytes 4-5 */
+#define AT91_EMAC_SA4L 0xb0 /* Specific Address 4 Low, bytes 0-3 */
+#define AT91_EMAC_SA4H 0xb4 /* Specific Address 4 High, bytes 4-5 */
+
+#endif
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