diff options
Diffstat (limited to 'drivers/net/arm/at91_ether.c')
| -rw-r--r-- | drivers/net/arm/at91_ether.c | 1254 |
1 files changed, 0 insertions, 1254 deletions
diff --git a/drivers/net/arm/at91_ether.c b/drivers/net/arm/at91_ether.c deleted file mode 100644 index 29dc43523cec..000000000000 --- a/drivers/net/arm/at91_ether.c +++ /dev/null @@ -1,1254 +0,0 @@ -/* - * 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 <roman@imsystems.ru> - * - * 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/interrupt.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 <linux/gfp.h> - -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/mach-types.h> - -#include <mach/at91rm9200_emac.h> -#include <mach/gpio.h> -#include <mach/board.h> - -#include "at91_ether.h" - -#define DRV_NAME "at91_ether" -#define DRV_VERSION "1.0" - -#define LINK_POLL_INTERVAL (HZ) - -/* ..................................................................... */ - -/* - * 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, int silent) -{ - struct at91_private *lp = netdev_priv(dev); - unsigned int bmsr, bmcr, lpa, mac_cfg; - unsigned int speed, duplex; - - if (!mii_link_ok(&lp->mii)) { /* no link */ - netif_carrier_off(dev); - if (!silent) - 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); - - if (!silent) - 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 net_device *dev = (struct net_device *) dev_id; - struct at91_private *lp = netdev_priv(dev); - 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; - } - else if (lp->phy_type == MII_T78Q21x3_ID) { /* ack interrupt in Teridian PHY */ - read_phy(lp->phy_address, MII_T78Q21INT_REG, &phy); - if (!(phy & ((1 << 2) | 1))) - goto done; - } - else if (lp->phy_type == MII_DP83848_ID) { - read_phy(lp->phy_address, MII_DPPHYSTS_REG, &phy); /* ack interrupt in DP83848 PHY */ - if (!(phy & (1 << 7))) - goto done; - } - - update_linkspeed(dev, 0); - -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 = netdev_priv(dev); - unsigned int dsintr, irq_number; - int status; - - irq_number = lp->board_data.phy_irq_pin; - if (!irq_number) { - /* - * PHY doesn't have an IRQ pin (RTL8201, DP83847, AC101L), - * or board does not have it connected. - */ - mod_timer(&lp->check_timer, jiffies + LINK_POLL_INTERVAL); - return; - } - - 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); - } - else if (lp->phy_type == MII_T78Q21x3_ID) { /* for Teridian PHY */ - read_phy(lp->phy_address, MII_T78Q21INT_REG, &dsintr); - dsintr = dsintr | 0x500; /* set bits 8, 10 */ - write_phy(lp->phy_address, MII_T78Q21INT_REG, dsintr); - } - else if (lp->phy_type == MII_DP83848_ID) { /* National Semiconductor DP83848 PHY */ - read_phy(lp->phy_address, MII_DPMISR_REG, &dsintr); - dsintr = dsintr | 0x3c; /* set bits 2..5 */ - write_phy(lp->phy_address, MII_DPMISR_REG, dsintr); - read_phy(lp->phy_address, MII_DPMICR_REG, &dsintr); - dsintr = dsintr | 0x3; /* set bits 0,1 */ - write_phy(lp->phy_address, MII_DPMICR_REG, dsintr); - } - - disable_mdi(); - spin_unlock_irq(&lp->lock); -} - -/* - * Disable the PHY interrupt - */ -static void disable_phyirq(struct net_device *dev) -{ - struct at91_private *lp = netdev_priv(dev); - unsigned int dsintr; - unsigned int irq_number; - - irq_number = lp->board_data.phy_irq_pin; - if (!irq_number) { - del_timer_sync(&lp->check_timer); - 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); - } - else if (lp->phy_type == MII_T78Q21x3_ID) { /* for Teridian PHY */ - read_phy(lp->phy_address, MII_T78Q21INT_REG, &dsintr); - dsintr = dsintr & ~0x500; /* clear bits 8, 10 */ - write_phy(lp->phy_address, MII_T78Q21INT_REG, dsintr); - } - else if (lp->phy_type == MII_DP83848_ID) { /* National Semiconductor DP83848 PHY */ - read_phy(lp->phy_address, MII_DPMICR_REG, &dsintr); - dsintr = dsintr & ~0x3; /* clear bits 0, 1 */ - write_phy(lp->phy_address, MII_DPMICR_REG, dsintr); - read_phy(lp->phy_address, MII_DPMISR_REG, &dsintr); - dsintr = dsintr & ~0x3c; /* clear bits 2..5 */ - write_phy(lp->phy_address, MII_DPMISR_REG, dsintr); - } - - disable_mdi(); - spin_unlock_irq(&lp->lock); - - 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 = netdev_priv(dev); - 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 - -static void at91ether_check_link(unsigned long dev_id) -{ - struct net_device *dev = (struct net_device *) dev_id; - struct at91_private *lp = netdev_priv(dev); - - enable_mdi(); - update_linkspeed(dev, 1); - disable_mdi(); - - mod_timer(&lp->check_timer, jiffies + LINK_POLL_INTERVAL); -} - -/* ......................... 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 %pM\n", dev->name, - dev->dev_addr); - - 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 netdev_hw_addr *ha; - unsigned long mc_filter[2]; - unsigned int bitnr; - - mc_filter[0] = mc_filter[1] = 0; - - netdev_for_each_mc_addr(ha, dev) { - bitnr = hash_get_index(ha->addr); - mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); - } - - at91_emac_write(AT91_EMAC_HSL, mc_filter[0]); - at91_emac_write(AT91_EMAC_HSH, mc_filter[1]); -} - -/* - * Enable/Disable promiscuous and multicast modes. - */ -static void at91ether_set_multicast_list(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 (!netdev_mc_empty(dev)) { /* 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 = netdev_priv(dev); - 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 = netdev_priv(dev); - 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 = netdev_priv(dev); - 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_name(dev->dev.parent), sizeof(info->bus_info)); -} - -static const 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, -}; - -static int at91ether_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - struct at91_private *lp = netdev_priv(dev); - int res; - - if (!netif_running(dev)) - return -EINVAL; - - spin_lock_irq(&lp->lock); - enable_mdi(); - res = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL); - disable_mdi(); - spin_unlock_irq(&lp->lock); - - return res; -} - -/* ................................ MAC ................................ */ - -/* - * Initialize and start the Receiver and Transmit subsystems - */ -static void at91ether_start(struct net_device *dev) -{ - struct at91_private *lp = netdev_priv(dev); - 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 = netdev_priv(dev); - unsigned long ctl; - - if (!is_valid_ether_addr(dev->dev_addr)) - return -EADDRNOTAVAIL; - - clk_enable(lp->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, 0); - 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) -{ - struct at91_private *lp = netdev_priv(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(lp->ether_clk); /* Disable Peripheral clock */ - - return 0; -} - -/* - * Transmit packet. - */ -static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct at91_private *lp = netdev_priv(dev); - - 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); - dev->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); - - } else { - printk(KERN_ERR "at91_ether.c: at91ether_start_xmit() called, but device is busy!\n"); - return NETDEV_TX_BUSY; /* 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 NETDEV_TX_OK; -} - -/* - * Update the current statistics from the internal statistics registers. - */ -static struct net_device_stats *at91ether_stats(struct net_device *dev) -{ - int ale, lenerr, seqe, lcol, ecol; - - if (netif_running(dev)) { - dev->stats.rx_packets += at91_emac_read(AT91_EMAC_OK); /* Good frames received */ - ale = at91_emac_read(AT91_EMAC_ALE); - dev->stats.rx_frame_errors += ale; /* Alignment errors */ - lenerr = at91_emac_read(AT91_EMAC_ELR) + at91_emac_read(AT91_EMAC_USF); - dev->stats.rx_length_errors += lenerr; /* Excessive Length or Undersize Frame error */ - seqe = at91_emac_read(AT91_EMAC_SEQE); - dev->stats.rx_crc_errors += seqe; /* CRC error */ - dev->stats.rx_fifo_errors += at91_emac_read(AT91_EMAC_DRFC); /* Receive buffer not available */ - dev->stats.rx_errors += (ale + lenerr + seqe - + at91_emac_read(AT91_EMAC_CDE) + at91_emac_read(AT91_EMAC_RJB)); - - dev->stats.tx_packets += at91_emac_read(AT91_EMAC_FRA); /* Frames successfully transmitted */ - dev->stats.tx_fifo_errors += at91_emac_read(AT91_EMAC_TUE); /* Transmit FIFO underruns */ - dev->stats.tx_carrier_errors += at91_emac_read(AT91_EMAC_CSE); /* Carrier Sense errors */ - dev->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); - dev->stats.tx_window_errors += lcol; /* Late collisions */ - dev->stats.tx_aborted_errors += ecol; /* 16 collisions */ - - dev->stats.collisions += (at91_emac_read(AT91_EMAC_SCOL) + at91_emac_read(AT91_EMAC_MCOL) + lcol + ecol); - } - return &dev->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 = netdev_priv(dev); - 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 = dev_alloc_skb(pktlen + 2); - if (skb != NULL) { - skb_reserve(skb, 2); - memcpy(skb_put(skb, pktlen), p_recv, pktlen); - - skb->protocol = eth_type_trans(skb, dev); - dev->stats.rx_bytes += pktlen; - netif_rx(skb); - } - else { - dev->stats.rx_dropped += 1; - printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); - } - - if (dlist->descriptors[lp->rxBuffIndex].size & EMAC_MULTICAST) - dev->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 net_device *dev = (struct net_device *) dev_id; - struct at91_private *lp = netdev_priv(dev); - 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)) - dev->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; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void at91ether_poll_controller(struct net_device *dev) -{ - unsigned long flags; - - local_irq_save(flags); - at91ether_interrupt(dev->irq, dev); - local_irq_restore(flags); -} -#endif - -static const struct net_device_ops at91ether_netdev_ops = { - .ndo_open = at91ether_open, - .ndo_stop = at91ether_close, - .ndo_start_xmit = at91ether_start_xmit, - .ndo_get_stats = at91ether_stats, - .ndo_set_multicast_list = at91ether_set_multicast_list, - .ndo_set_mac_address = set_mac_address, - .ndo_do_ioctl = at91ether_ioctl, - .ndo_validate_addr = eth_validate_addr, - .ndo_change_mtu = eth_change_mtu, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = at91ether_poll_controller, -#endif -}; - -/* - * Initialize the ethernet interface - */ -static int __init at91ether_setup(unsigned long phy_type, unsigned short phy_address, - struct platform_device *pdev, struct clk *ether_clk) -{ - struct at91_eth_data *board_data = pdev->dev.platform_data; - struct net_device *dev; - struct at91_private *lp; - unsigned int val; - int res; - - dev = alloc_etherdev(sizeof(struct at91_private)); - if (!dev) - return -ENOMEM; - - dev->base_addr = AT91_VA_BASE_EMAC; - dev->irq = AT91RM9200_ID_EMAC; - - /* 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 = netdev_priv(dev); - 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; - lp->ether_clk = ether_clk; - platform_set_drvdata(pdev, dev); - - spin_lock_init(&lp->lock); - - ether_setup(dev); - dev->netdev_ops = &at91ether_netdev_ops; - 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); - } else if (machine_is_ecbat91()) - write_phy(phy_address, MII_LEDCTRL_REG, 0x156A); - - 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->mii.phy_id = phy_address; - lp->mii.phy_id_mask = 0x1f; - lp->mii.reg_num_mask = 0x1f; - - 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; - } - - /* Determine current link speed */ - spin_lock_irq(&lp->lock); - enable_mdi(); - update_linkspeed(dev, 0); - disable_mdi(); - spin_unlock_irq(&lp->lock); - netif_carrier_off(dev); /* will be enabled in open() */ - - /* If board has no PHY IRQ, use a timer to poll the PHY */ - if (!lp->board_data.phy_irq_pin) { - init_timer(&lp->check_timer); - lp->check_timer.data = (unsigned long)dev; - lp->check_timer.function = at91ether_check_link; - } else if (lp->board_data.phy_irq_pin >= 32) - gpio_request(lp->board_data.phy_irq_pin, "ethernet_phy"); - - /* Display ethernet banner */ - printk(KERN_INFO "%s: AT91 ethernet at 0x%08x int=%d %s%s (%pM)\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); - if ((phy_type == MII_DM9161_ID) || (lp->phy_type == MII_DM9161A_ID)) - printk(KERN_INFO "%s: Davicom 9161 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_DP83848_ID) - printk(KERN_INFO "%s: National Semiconductor DP83848 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); - else if (phy_type == MII_T78Q21x3_ID) - printk(KERN_INFO "%s: Teridian 78Q21x3 PHY\n", dev->name); - else if (phy_type == MII_LAN83C185_ID) - printk(KERN_INFO "%s: SMSC LAN83C185 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; - struct clk *ether_clk; - - ether_clk = clk_get(&pdev->dev, "ether_clk"); - if (IS_ERR(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_DP83848_ID: /* National Semiconductor DP83848: */ - case MII_AC101L_ID: /* Altima AC101L: PHY_ID1 = 0x22, PHY_ID2 = 0x5520 */ - case MII_KS8721_ID: /* Micrel KS8721: PHY_ID1 = 0x22, PHY_ID2 = 0x1610 */ - case MII_T78Q21x3_ID: /* Teridian 78Q21x3: PHY_ID1 = 0x0E, PHY_ID2 = 7237 */ - case MII_LAN83C185_ID: /* SMSC LAN83C185: PHY_ID1 = 0x0007, PHY_ID2 = 0xC0A1 */ - detected = at91ether_setup(phy_id, phy_address, pdev, ether_clk); - break; - } - - phy_address++; - } - - clk_disable(ether_clk); /* Disable Peripheral clock */ - - return detected; -} - -static int __devexit at91ether_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - struct at91_private *lp = netdev_priv(dev); - - if (lp->board_data.phy_irq_pin >= 32) - gpio_free(lp->board_data.phy_irq_pin); - - unregister_netdev(dev); - free_irq(dev->irq, dev); - dma_free_coherent(NULL, sizeof(struct recv_desc_bufs), lp->dlist, (dma_addr_t)lp->dlist_phys); - clk_put(lp->ether_clk); - - platform_set_drvdata(pdev, NULL); - free_netdev(dev); - return 0; -} - -#ifdef CONFIG_PM - -static int at91ether_suspend(struct platform_device *pdev, pm_message_t mesg) -{ - struct net_device *net_dev = platform_get_drvdata(pdev); - struct at91_private *lp = netdev_priv(net_dev); - int phy_irq = lp->board_data.phy_irq_pin; - - if (netif_running(net_dev)) { - if (phy_irq) - disable_irq(phy_irq); - - netif_stop_queue(net_dev); - netif_device_detach(net_dev); - - clk_disable(lp->ether_clk); - } - return 0; -} - -static int at91ether_resume(struct platform_device *pdev) -{ - struct net_device *net_dev = platform_get_drvdata(pdev); - struct at91_private *lp = netdev_priv(net_dev); - int phy_irq = lp->board_data.phy_irq_pin; - - if (netif_running(net_dev)) { - clk_enable(lp->ether_clk); - - netif_device_attach(net_dev); - netif_start_queue(net_dev); - - if (phy_irq) - enable_irq(phy_irq); - } - return 0; -} - -#else -#define at91ether_suspend NULL -#define at91ether_resume NULL -#endif - -static struct platform_driver at91ether_driver = { - .remove = __devexit_p(at91ether_remove), - .suspend = at91ether_suspend, - .resume = at91ether_resume, - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init at91ether_init(void) -{ - return platform_driver_probe(&at91ether_driver, at91ether_probe); -} - -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"); -MODULE_ALIAS("platform:" DRV_NAME); |