projects/linux·commit d4b7780e

[PATCH] AT91RM9200 Ethernet driver

d4b7780e · Andrew Victor <[email protected]> · 2006-03-24 11:50:17 +02:00

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]>
Signed-off-by: Jeff Garzik <[email protected]>
Commit
d4b7780ea1d2e08410fcc9963a57254147ae577a
Parents
e93252fa

Changes

5 files changed · +1358 −0

FileStatusAddDelContent
drivers/net/arm/Kconfigmodified+8−0View file
drivers/net/arm/Makefilemodified+1−0View file
drivers/net/arm/at91_ether.cadded+1110−0View file
drivers/net/arm/at91_ether.hadded+101−0View file
include/asm-arm/arch-at91rm9200/at91rm9200_emac.hadded+138−0View file

Only the first 600 diff lines are shown. Download the complete patch.

drivers/net/arm/Kconfig

View file
diff --git a/drivers/net/arm/Kconfig b/drivers/net/arm/Kconfig
index 625184b..77fe20d 100644
--- a/drivers/net/arm/Kconfig
+++ b/drivers/net/arm/Kconfig
@@ -31,3 +31,11 @@ config ARM_ETHERH
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.

drivers/net/arm/Makefile

View file
diff --git a/drivers/net/arm/Makefile b/drivers/net/arm/Makefile
index bc263ed..42c95b7 100644
--- a/drivers/net/arm/Makefile
+++ b/drivers/net/arm/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_ARM_AM79C961A) += am79c961a.o
obj-$(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

drivers/net/arm/at91_ether.c

View file
diff --git a/drivers/net/arm/at91_ether.c b/drivers/net/arm/at91_ether.c
new file mode 100644
index 0000000..5503dc8
--- /dev/null
+++ b/drivers/net/arm/at91_ether.c
@@ -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;

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drivers/net/arm/at91_ether.h

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include/asm-arm/arch-at91rm9200/at91rm9200_emac.h

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