diff options
Diffstat (limited to 'drivers/net/ethernet/amd/au1000_eth.c')
| -rw-r--r-- | drivers/net/ethernet/amd/au1000_eth.c | 1376 |
1 files changed, 1376 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c new file mode 100644 index 000000000..19e195420 --- /dev/null +++ b/drivers/net/ethernet/amd/au1000_eth.c @@ -0,0 +1,1376 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * + * Alchemy Au1x00 ethernet driver + * + * Copyright 2001-2003, 2006 MontaVista Software Inc. + * Copyright 2002 TimeSys Corp. + * Added ethtool/mii-tool support, + * Copyright 2004 Matt Porter <mporter@kernel.crashing.org> + * Update: 2004 Bjoern Riemer, riemer@fokus.fraunhofer.de + * or riemer@riemer-nt.de: fixed the link beat detection with + * ioctls (SIOCGMIIPHY) + * Copyright 2006 Herbert Valerio Riedel <hvr@gnu.org> + * converted to use linux-2.6.x's PHY framework + * + * Author: MontaVista Software, Inc. + * ppopov@mvista.com or source@mvista.com + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/capability.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/errno.h> +#include <linux/in.h> +#include <linux/ioport.h> +#include <linux/bitops.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/skbuff.h> +#include <linux/delay.h> +#include <linux/crc32.h> +#include <linux/phy.h> +#include <linux/platform_device.h> +#include <linux/cpu.h> +#include <linux/io.h> + +#include <asm/mipsregs.h> +#include <asm/irq.h> +#include <asm/processor.h> + +#include <au1000.h> +#include <au1xxx_eth.h> +#include <prom.h> + +#include "au1000_eth.h" + +#ifdef AU1000_ETH_DEBUG +static int au1000_debug = 5; +#else +static int au1000_debug = 3; +#endif + +#define AU1000_DEF_MSG_ENABLE (NETIF_MSG_DRV | \ + NETIF_MSG_PROBE | \ + NETIF_MSG_LINK) + +#define DRV_NAME "au1000_eth" +#define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>" +#define DRV_DESC "Au1xxx on-chip Ethernet driver" + +MODULE_AUTHOR(DRV_AUTHOR); +MODULE_DESCRIPTION(DRV_DESC); +MODULE_LICENSE("GPL"); + +/* AU1000 MAC registers and bits */ +#define MAC_CONTROL 0x0 +# define MAC_RX_ENABLE (1 << 2) +# define MAC_TX_ENABLE (1 << 3) +# define MAC_DEF_CHECK (1 << 5) +# define MAC_SET_BL(X) (((X) & 0x3) << 6) +# define MAC_AUTO_PAD (1 << 8) +# define MAC_DISABLE_RETRY (1 << 10) +# define MAC_DISABLE_BCAST (1 << 11) +# define MAC_LATE_COL (1 << 12) +# define MAC_HASH_MODE (1 << 13) +# define MAC_HASH_ONLY (1 << 15) +# define MAC_PASS_ALL (1 << 16) +# define MAC_INVERSE_FILTER (1 << 17) +# define MAC_PROMISCUOUS (1 << 18) +# define MAC_PASS_ALL_MULTI (1 << 19) +# define MAC_FULL_DUPLEX (1 << 20) +# define MAC_NORMAL_MODE 0 +# define MAC_INT_LOOPBACK (1 << 21) +# define MAC_EXT_LOOPBACK (1 << 22) +# define MAC_DISABLE_RX_OWN (1 << 23) +# define MAC_BIG_ENDIAN (1 << 30) +# define MAC_RX_ALL (1 << 31) +#define MAC_ADDRESS_HIGH 0x4 +#define MAC_ADDRESS_LOW 0x8 +#define MAC_MCAST_HIGH 0xC +#define MAC_MCAST_LOW 0x10 +#define MAC_MII_CNTRL 0x14 +# define MAC_MII_BUSY (1 << 0) +# define MAC_MII_READ 0 +# define MAC_MII_WRITE (1 << 1) +# define MAC_SET_MII_SELECT_REG(X) (((X) & 0x1f) << 6) +# define MAC_SET_MII_SELECT_PHY(X) (((X) & 0x1f) << 11) +#define MAC_MII_DATA 0x18 +#define MAC_FLOW_CNTRL 0x1C +# define MAC_FLOW_CNTRL_BUSY (1 << 0) +# define MAC_FLOW_CNTRL_ENABLE (1 << 1) +# define MAC_PASS_CONTROL (1 << 2) +# define MAC_SET_PAUSE(X) (((X) & 0xffff) << 16) +#define MAC_VLAN1_TAG 0x20 +#define MAC_VLAN2_TAG 0x24 + +/* Ethernet Controller Enable */ +# define MAC_EN_CLOCK_ENABLE (1 << 0) +# define MAC_EN_RESET0 (1 << 1) +# define MAC_EN_TOSS (0 << 2) +# define MAC_EN_CACHEABLE (1 << 3) +# define MAC_EN_RESET1 (1 << 4) +# define MAC_EN_RESET2 (1 << 5) +# define MAC_DMA_RESET (1 << 6) + +/* Ethernet Controller DMA Channels */ +/* offsets from MAC_TX_RING_ADDR address */ +#define MAC_TX_BUFF0_STATUS 0x0 +# define TX_FRAME_ABORTED (1 << 0) +# define TX_JAB_TIMEOUT (1 << 1) +# define TX_NO_CARRIER (1 << 2) +# define TX_LOSS_CARRIER (1 << 3) +# define TX_EXC_DEF (1 << 4) +# define TX_LATE_COLL_ABORT (1 << 5) +# define TX_EXC_COLL (1 << 6) +# define TX_UNDERRUN (1 << 7) +# define TX_DEFERRED (1 << 8) +# define TX_LATE_COLL (1 << 9) +# define TX_COLL_CNT_MASK (0xF << 10) +# define TX_PKT_RETRY (1 << 31) +#define MAC_TX_BUFF0_ADDR 0x4 +# define TX_DMA_ENABLE (1 << 0) +# define TX_T_DONE (1 << 1) +# define TX_GET_DMA_BUFFER(X) (((X) >> 2) & 0x3) +#define MAC_TX_BUFF0_LEN 0x8 +#define MAC_TX_BUFF1_STATUS 0x10 +#define MAC_TX_BUFF1_ADDR 0x14 +#define MAC_TX_BUFF1_LEN 0x18 +#define MAC_TX_BUFF2_STATUS 0x20 +#define MAC_TX_BUFF2_ADDR 0x24 +#define MAC_TX_BUFF2_LEN 0x28 +#define MAC_TX_BUFF3_STATUS 0x30 +#define MAC_TX_BUFF3_ADDR 0x34 +#define MAC_TX_BUFF3_LEN 0x38 + +/* offsets from MAC_RX_RING_ADDR */ +#define MAC_RX_BUFF0_STATUS 0x0 +# define RX_FRAME_LEN_MASK 0x3fff +# define RX_WDOG_TIMER (1 << 14) +# define RX_RUNT (1 << 15) +# define RX_OVERLEN (1 << 16) +# define RX_COLL (1 << 17) +# define RX_ETHER (1 << 18) +# define RX_MII_ERROR (1 << 19) +# define RX_DRIBBLING (1 << 20) +# define RX_CRC_ERROR (1 << 21) +# define RX_VLAN1 (1 << 22) +# define RX_VLAN2 (1 << 23) +# define RX_LEN_ERROR (1 << 24) +# define RX_CNTRL_FRAME (1 << 25) +# define RX_U_CNTRL_FRAME (1 << 26) +# define RX_MCAST_FRAME (1 << 27) +# define RX_BCAST_FRAME (1 << 28) +# define RX_FILTER_FAIL (1 << 29) +# define RX_PACKET_FILTER (1 << 30) +# define RX_MISSED_FRAME (1 << 31) + +# define RX_ERROR (RX_WDOG_TIMER | RX_RUNT | RX_OVERLEN | \ + RX_COLL | RX_MII_ERROR | RX_CRC_ERROR | \ + RX_LEN_ERROR | RX_U_CNTRL_FRAME | RX_MISSED_FRAME) +#define MAC_RX_BUFF0_ADDR 0x4 +# define RX_DMA_ENABLE (1 << 0) +# define RX_T_DONE (1 << 1) +# define RX_GET_DMA_BUFFER(X) (((X) >> 2) & 0x3) +# define RX_SET_BUFF_ADDR(X) ((X) & 0xffffffc0) +#define MAC_RX_BUFF1_STATUS 0x10 +#define MAC_RX_BUFF1_ADDR 0x14 +#define MAC_RX_BUFF2_STATUS 0x20 +#define MAC_RX_BUFF2_ADDR 0x24 +#define MAC_RX_BUFF3_STATUS 0x30 +#define MAC_RX_BUFF3_ADDR 0x34 + +/* + * Theory of operation + * + * The Au1000 MACs use a simple rx and tx descriptor ring scheme. + * There are four receive and four transmit descriptors. These + * descriptors are not in memory; rather, they are just a set of + * hardware registers. + * + * Since the Au1000 has a coherent data cache, the receive and + * transmit buffers are allocated from the KSEG0 segment. The + * hardware registers, however, are still mapped at KSEG1 to + * make sure there's no out-of-order writes, and that all writes + * complete immediately. + */ + +/* + * board-specific configurations + * + * PHY detection algorithm + * + * If phy_static_config is undefined, the PHY setup is + * autodetected: + * + * mii_probe() first searches the current MAC's MII bus for a PHY, + * selecting the first (or last, if phy_search_highest_addr is + * defined) PHY address not already claimed by another netdev. + * + * If nothing was found that way when searching for the 2nd ethernet + * controller's PHY and phy1_search_mac0 is defined, then + * the first MII bus is searched as well for an unclaimed PHY; this is + * needed in case of a dual-PHY accessible only through the MAC0's MII + * bus. + * + * Finally, if no PHY is found, then the corresponding ethernet + * controller is not registered to the network subsystem. + */ + +/* autodetection defaults: phy1_search_mac0 */ + +/* static PHY setup + * + * most boards PHY setup should be detectable properly with the + * autodetection algorithm in mii_probe(), but in some cases (e.g. if + * you have a switch attached, or want to use the PHY's interrupt + * notification capabilities) you can provide a static PHY + * configuration here + * + * IRQs may only be set, if a PHY address was configured + * If a PHY address is given, also a bus id is required to be set + * + * ps: make sure the used irqs are configured properly in the board + * specific irq-map + */ +static void au1000_enable_mac(struct net_device *dev, int force_reset) +{ + unsigned long flags; + struct au1000_private *aup = netdev_priv(dev); + + spin_lock_irqsave(&aup->lock, flags); + + if (force_reset || (!aup->mac_enabled)) { + writel(MAC_EN_CLOCK_ENABLE, aup->enable); + wmb(); /* drain writebuffer */ + mdelay(2); + writel((MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2 + | MAC_EN_CLOCK_ENABLE), aup->enable); + wmb(); /* drain writebuffer */ + mdelay(2); + + aup->mac_enabled = 1; + } + + spin_unlock_irqrestore(&aup->lock, flags); +} + +/* + * MII operations + */ +static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg) +{ + struct au1000_private *aup = netdev_priv(dev); + u32 *const mii_control_reg = &aup->mac->mii_control; + u32 *const mii_data_reg = &aup->mac->mii_data; + u32 timedout = 20; + u32 mii_control; + + while (readl(mii_control_reg) & MAC_MII_BUSY) { + mdelay(1); + if (--timedout == 0) { + netdev_err(dev, "read_MII busy timeout!!\n"); + return -1; + } + } + + mii_control = MAC_SET_MII_SELECT_REG(reg) | + MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ; + + writel(mii_control, mii_control_reg); + + timedout = 20; + while (readl(mii_control_reg) & MAC_MII_BUSY) { + mdelay(1); + if (--timedout == 0) { + netdev_err(dev, "mdio_read busy timeout!!\n"); + return -1; + } + } + return readl(mii_data_reg); +} + +static void au1000_mdio_write(struct net_device *dev, int phy_addr, + int reg, u16 value) +{ + struct au1000_private *aup = netdev_priv(dev); + u32 *const mii_control_reg = &aup->mac->mii_control; + u32 *const mii_data_reg = &aup->mac->mii_data; + u32 timedout = 20; + u32 mii_control; + + while (readl(mii_control_reg) & MAC_MII_BUSY) { + mdelay(1); + if (--timedout == 0) { + netdev_err(dev, "mdio_write busy timeout!!\n"); + return; + } + } + + mii_control = MAC_SET_MII_SELECT_REG(reg) | + MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE; + + writel(value, mii_data_reg); + writel(mii_control, mii_control_reg); +} + +static int au1000_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) +{ + struct net_device *const dev = bus->priv; + + /* make sure the MAC associated with this + * mii_bus is enabled + */ + au1000_enable_mac(dev, 0); + + return au1000_mdio_read(dev, phy_addr, regnum); +} + +static int au1000_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, + u16 value) +{ + struct net_device *const dev = bus->priv; + + /* make sure the MAC associated with this + * mii_bus is enabled + */ + au1000_enable_mac(dev, 0); + + au1000_mdio_write(dev, phy_addr, regnum, value); + return 0; +} + +static int au1000_mdiobus_reset(struct mii_bus *bus) +{ + struct net_device *const dev = bus->priv; + + /* make sure the MAC associated with this + * mii_bus is enabled + */ + au1000_enable_mac(dev, 0); + + return 0; +} + +static void au1000_hard_stop(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + u32 reg; + + netif_dbg(aup, drv, dev, "hard stop\n"); + + reg = readl(&aup->mac->control); + reg &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE); + writel(reg, &aup->mac->control); + wmb(); /* drain writebuffer */ + mdelay(10); +} + +static void au1000_enable_rx_tx(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + u32 reg; + + netif_dbg(aup, hw, dev, "enable_rx_tx\n"); + + reg = readl(&aup->mac->control); + reg |= (MAC_RX_ENABLE | MAC_TX_ENABLE); + writel(reg, &aup->mac->control); + wmb(); /* drain writebuffer */ + mdelay(10); +} + +static void +au1000_adjust_link(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + struct phy_device *phydev = dev->phydev; + unsigned long flags; + u32 reg; + + int status_change = 0; + + BUG_ON(!phydev); + + spin_lock_irqsave(&aup->lock, flags); + + if (phydev->link && (aup->old_speed != phydev->speed)) { + /* speed changed */ + + switch (phydev->speed) { + case SPEED_10: + case SPEED_100: + break; + default: + netdev_warn(dev, "Speed (%d) is not 10/100 ???\n", + phydev->speed); + break; + } + + aup->old_speed = phydev->speed; + + status_change = 1; + } + + if (phydev->link && (aup->old_duplex != phydev->duplex)) { + /* duplex mode changed */ + + /* switching duplex mode requires to disable rx and tx! */ + au1000_hard_stop(dev); + + reg = readl(&aup->mac->control); + if (DUPLEX_FULL == phydev->duplex) { + reg |= MAC_FULL_DUPLEX; + reg &= ~MAC_DISABLE_RX_OWN; + } else { + reg &= ~MAC_FULL_DUPLEX; + reg |= MAC_DISABLE_RX_OWN; + } + writel(reg, &aup->mac->control); + wmb(); /* drain writebuffer */ + mdelay(1); + + au1000_enable_rx_tx(dev); + aup->old_duplex = phydev->duplex; + + status_change = 1; + } + + if (phydev->link != aup->old_link) { + /* link state changed */ + + if (!phydev->link) { + /* link went down */ + aup->old_speed = 0; + aup->old_duplex = -1; + } + + aup->old_link = phydev->link; + status_change = 1; + } + + spin_unlock_irqrestore(&aup->lock, flags); + + if (status_change) { + if (phydev->link) + netdev_info(dev, "link up (%d/%s)\n", + phydev->speed, + DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); + else + netdev_info(dev, "link down\n"); + } +} + +static int au1000_mii_probe(struct net_device *dev) +{ + struct au1000_private *const aup = netdev_priv(dev); + struct phy_device *phydev = NULL; + int phy_addr; + + if (aup->phy_static_config) { + BUG_ON(aup->mac_id < 0 || aup->mac_id > 1); + + if (aup->phy_addr) + phydev = mdiobus_get_phy(aup->mii_bus, aup->phy_addr); + else + netdev_info(dev, "using PHY-less setup\n"); + return 0; + } + + /* find the first (lowest address) PHY + * on the current MAC's MII bus + */ + for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) + if (mdiobus_get_phy(aup->mii_bus, phy_addr)) { + phydev = mdiobus_get_phy(aup->mii_bus, phy_addr); + if (!aup->phy_search_highest_addr) + /* break out with first one found */ + break; + } + + if (aup->phy1_search_mac0) { + /* try harder to find a PHY */ + if (!phydev && (aup->mac_id == 1)) { + /* no PHY found, maybe we have a dual PHY? */ + dev_info(&dev->dev, ": no PHY found on MAC1, " + "let's see if it's attached to MAC0...\n"); + + /* find the first (lowest address) non-attached + * PHY on the MAC0 MII bus + */ + for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { + struct phy_device *const tmp_phydev = + mdiobus_get_phy(aup->mii_bus, + phy_addr); + + if (aup->mac_id == 1) + break; + + /* no PHY here... */ + if (!tmp_phydev) + continue; + + /* already claimed by MAC0 */ + if (tmp_phydev->attached_dev) + continue; + + phydev = tmp_phydev; + break; /* found it */ + } + } + } + + if (!phydev) { + netdev_err(dev, "no PHY found\n"); + return -1; + } + + /* now we are supposed to have a proper phydev, to attach to... */ + BUG_ON(phydev->attached_dev); + + phydev = phy_connect(dev, phydev_name(phydev), + &au1000_adjust_link, PHY_INTERFACE_MODE_MII); + + if (IS_ERR(phydev)) { + netdev_err(dev, "Could not attach to PHY\n"); + return PTR_ERR(phydev); + } + + phy_set_max_speed(phydev, SPEED_100); + + aup->old_link = 0; + aup->old_speed = 0; + aup->old_duplex = -1; + + phy_attached_info(phydev); + + return 0; +} + +/* + * Buffer allocation/deallocation routines. The buffer descriptor returned + * has the virtual and dma address of a buffer suitable for + * both, receive and transmit operations. + */ +static struct db_dest *au1000_GetFreeDB(struct au1000_private *aup) +{ + struct db_dest *pDB; + pDB = aup->pDBfree; + + if (pDB) + aup->pDBfree = pDB->pnext; + + return pDB; +} + +void au1000_ReleaseDB(struct au1000_private *aup, struct db_dest *pDB) +{ + struct db_dest *pDBfree = aup->pDBfree; + if (pDBfree) + pDBfree->pnext = pDB; + aup->pDBfree = pDB; +} + +static void au1000_reset_mac_unlocked(struct net_device *dev) +{ + struct au1000_private *const aup = netdev_priv(dev); + int i; + + au1000_hard_stop(dev); + + writel(MAC_EN_CLOCK_ENABLE, aup->enable); + wmb(); /* drain writebuffer */ + mdelay(2); + writel(0, aup->enable); + wmb(); /* drain writebuffer */ + mdelay(2); + + aup->tx_full = 0; + for (i = 0; i < NUM_RX_DMA; i++) { + /* reset control bits */ + aup->rx_dma_ring[i]->buff_stat &= ~0xf; + } + for (i = 0; i < NUM_TX_DMA; i++) { + /* reset control bits */ + aup->tx_dma_ring[i]->buff_stat &= ~0xf; + } + + aup->mac_enabled = 0; + +} + +static void au1000_reset_mac(struct net_device *dev) +{ + struct au1000_private *const aup = netdev_priv(dev); + unsigned long flags; + + netif_dbg(aup, hw, dev, "reset mac, aup %x\n", + (unsigned)aup); + + spin_lock_irqsave(&aup->lock, flags); + + au1000_reset_mac_unlocked(dev); + + spin_unlock_irqrestore(&aup->lock, flags); +} + +/* + * Setup the receive and transmit "rings". These pointers are the addresses + * of the rx and tx MAC DMA registers so they are fixed by the hardware -- + * these are not descriptors sitting in memory. + */ +static void +au1000_setup_hw_rings(struct au1000_private *aup, void __iomem *tx_base) +{ + int i; + + for (i = 0; i < NUM_RX_DMA; i++) { + aup->rx_dma_ring[i] = (struct rx_dma *) + (tx_base + 0x100 + sizeof(struct rx_dma) * i); + } + for (i = 0; i < NUM_TX_DMA; i++) { + aup->tx_dma_ring[i] = (struct tx_dma *) + (tx_base + sizeof(struct tx_dma) * i); + } +} + +/* + * ethtool operations + */ +static void +au1000_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct au1000_private *aup = netdev_priv(dev); + + strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); + snprintf(info->bus_info, sizeof(info->bus_info), "%s %d", DRV_NAME, + aup->mac_id); +} + +static void au1000_set_msglevel(struct net_device *dev, u32 value) +{ + struct au1000_private *aup = netdev_priv(dev); + aup->msg_enable = value; +} + +static u32 au1000_get_msglevel(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + return aup->msg_enable; +} + +static const struct ethtool_ops au1000_ethtool_ops = { + .get_drvinfo = au1000_get_drvinfo, + .get_link = ethtool_op_get_link, + .get_msglevel = au1000_get_msglevel, + .set_msglevel = au1000_set_msglevel, + .get_link_ksettings = phy_ethtool_get_link_ksettings, + .set_link_ksettings = phy_ethtool_set_link_ksettings, +}; + +/* + * Initialize the interface. + * + * When the device powers up, the clocks are disabled and the + * mac is in reset state. When the interface is closed, we + * do the same -- reset the device and disable the clocks to + * conserve power. Thus, whenever au1000_init() is called, + * the device should already be in reset state. + */ +static int au1000_init(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + unsigned long flags; + int i; + u32 control; + + netif_dbg(aup, hw, dev, "au1000_init\n"); + + /* bring the device out of reset */ + au1000_enable_mac(dev, 1); + + spin_lock_irqsave(&aup->lock, flags); + + writel(0, &aup->mac->control); + aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2; + aup->tx_tail = aup->tx_head; + aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2; + + writel(dev->dev_addr[5]<<8 | dev->dev_addr[4], + &aup->mac->mac_addr_high); + writel(dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 | + dev->dev_addr[1]<<8 | dev->dev_addr[0], + &aup->mac->mac_addr_low); + + + for (i = 0; i < NUM_RX_DMA; i++) + aup->rx_dma_ring[i]->buff_stat |= RX_DMA_ENABLE; + + wmb(); /* drain writebuffer */ + + control = MAC_RX_ENABLE | MAC_TX_ENABLE; +#ifndef CONFIG_CPU_LITTLE_ENDIAN + control |= MAC_BIG_ENDIAN; +#endif + if (dev->phydev) { + if (dev->phydev->link && (DUPLEX_FULL == dev->phydev->duplex)) + control |= MAC_FULL_DUPLEX; + else + control |= MAC_DISABLE_RX_OWN; + } else { /* PHY-less op, assume full-duplex */ + control |= MAC_FULL_DUPLEX; + } + + writel(control, &aup->mac->control); + writel(0x8100, &aup->mac->vlan1_tag); /* activate vlan support */ + wmb(); /* drain writebuffer */ + + spin_unlock_irqrestore(&aup->lock, flags); + return 0; +} + +static inline void au1000_update_rx_stats(struct net_device *dev, u32 status) +{ + struct net_device_stats *ps = &dev->stats; + + ps->rx_packets++; + if (status & RX_MCAST_FRAME) + ps->multicast++; + + if (status & RX_ERROR) { + ps->rx_errors++; + if (status & RX_MISSED_FRAME) + ps->rx_missed_errors++; + if (status & (RX_OVERLEN | RX_RUNT | RX_LEN_ERROR)) + ps->rx_length_errors++; + if (status & RX_CRC_ERROR) + ps->rx_crc_errors++; + if (status & RX_COLL) + ps->collisions++; + } else + ps->rx_bytes += status & RX_FRAME_LEN_MASK; + +} + +/* + * Au1000 receive routine. + */ +static int au1000_rx(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + struct sk_buff *skb; + struct rx_dma *prxd; + u32 buff_stat, status; + struct db_dest *pDB; + u32 frmlen; + + netif_dbg(aup, rx_status, dev, "au1000_rx head %d\n", aup->rx_head); + + prxd = aup->rx_dma_ring[aup->rx_head]; + buff_stat = prxd->buff_stat; + while (buff_stat & RX_T_DONE) { + status = prxd->status; + pDB = aup->rx_db_inuse[aup->rx_head]; + au1000_update_rx_stats(dev, status); + if (!(status & RX_ERROR)) { + + /* good frame */ + frmlen = (status & RX_FRAME_LEN_MASK); + frmlen -= 4; /* Remove FCS */ + skb = netdev_alloc_skb(dev, frmlen + 2); + if (skb == NULL) { + dev->stats.rx_dropped++; + continue; + } + skb_reserve(skb, 2); /* 16 byte IP header align */ + skb_copy_to_linear_data(skb, + (unsigned char *)pDB->vaddr, frmlen); + skb_put(skb, frmlen); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); /* pass the packet to upper layers */ + } else { + if (au1000_debug > 4) { + pr_err("rx_error(s):"); + if (status & RX_MISSED_FRAME) + pr_cont(" miss"); + if (status & RX_WDOG_TIMER) + pr_cont(" wdog"); + if (status & RX_RUNT) + pr_cont(" runt"); + if (status & RX_OVERLEN) + pr_cont(" overlen"); + if (status & RX_COLL) + pr_cont(" coll"); + if (status & RX_MII_ERROR) + pr_cont(" mii error"); + if (status & RX_CRC_ERROR) + pr_cont(" crc error"); + if (status & RX_LEN_ERROR) + pr_cont(" len error"); + if (status & RX_U_CNTRL_FRAME) + pr_cont(" u control frame"); + pr_cont("\n"); + } + } + prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE); + aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1); + wmb(); /* drain writebuffer */ + + /* next descriptor */ + prxd = aup->rx_dma_ring[aup->rx_head]; + buff_stat = prxd->buff_stat; + } + return 0; +} + +static void au1000_update_tx_stats(struct net_device *dev, u32 status) +{ + struct net_device_stats *ps = &dev->stats; + + if (status & TX_FRAME_ABORTED) { + if (!dev->phydev || (DUPLEX_FULL == dev->phydev->duplex)) { + if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) { + /* any other tx errors are only valid + * in half duplex mode + */ + ps->tx_errors++; + ps->tx_aborted_errors++; + } + } else { + ps->tx_errors++; + ps->tx_aborted_errors++; + if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER)) + ps->tx_carrier_errors++; + } + } +} + +/* + * Called from the interrupt service routine to acknowledge + * the TX DONE bits. This is a must if the irq is setup as + * edge triggered. + */ +static void au1000_tx_ack(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + struct tx_dma *ptxd; + + ptxd = aup->tx_dma_ring[aup->tx_tail]; + + while (ptxd->buff_stat & TX_T_DONE) { + au1000_update_tx_stats(dev, ptxd->status); + ptxd->buff_stat &= ~TX_T_DONE; + ptxd->len = 0; + wmb(); /* drain writebuffer */ + + aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1); + ptxd = aup->tx_dma_ring[aup->tx_tail]; + + if (aup->tx_full) { + aup->tx_full = 0; + netif_wake_queue(dev); + } + } +} + +/* + * Au1000 interrupt service routine. + */ +static irqreturn_t au1000_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + + /* Handle RX interrupts first to minimize chance of overrun */ + + au1000_rx(dev); + au1000_tx_ack(dev); + return IRQ_RETVAL(1); +} + +static int au1000_open(struct net_device *dev) +{ + int retval; + struct au1000_private *aup = netdev_priv(dev); + + netif_dbg(aup, drv, dev, "open: dev=%p\n", dev); + + retval = request_irq(dev->irq, au1000_interrupt, 0, + dev->name, dev); + if (retval) { + netdev_err(dev, "unable to get IRQ %d\n", dev->irq); + return retval; + } + + retval = au1000_init(dev); + if (retval) { + netdev_err(dev, "error in au1000_init\n"); + free_irq(dev->irq, dev); + return retval; + } + + if (dev->phydev) + phy_start(dev->phydev); + + netif_start_queue(dev); + + netif_dbg(aup, drv, dev, "open: Initialization done.\n"); + + return 0; +} + +static int au1000_close(struct net_device *dev) +{ + unsigned long flags; + struct au1000_private *const aup = netdev_priv(dev); + + netif_dbg(aup, drv, dev, "close: dev=%p\n", dev); + + if (dev->phydev) + phy_stop(dev->phydev); + + spin_lock_irqsave(&aup->lock, flags); + + au1000_reset_mac_unlocked(dev); + + /* stop the device */ + netif_stop_queue(dev); + + /* disable the interrupt */ + free_irq(dev->irq, dev); + spin_unlock_irqrestore(&aup->lock, flags); + + return 0; +} + +/* + * Au1000 transmit routine. + */ +static netdev_tx_t au1000_tx(struct sk_buff *skb, struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + struct net_device_stats *ps = &dev->stats; + struct tx_dma *ptxd; + u32 buff_stat; + struct db_dest *pDB; + int i; + + netif_dbg(aup, tx_queued, dev, "tx: aup %x len=%d, data=%p, head %d\n", + (unsigned)aup, skb->len, + skb->data, aup->tx_head); + + ptxd = aup->tx_dma_ring[aup->tx_head]; + buff_stat = ptxd->buff_stat; + if (buff_stat & TX_DMA_ENABLE) { + /* We've wrapped around and the transmitter is still busy */ + netif_stop_queue(dev); + aup->tx_full = 1; + return NETDEV_TX_BUSY; + } else if (buff_stat & TX_T_DONE) { + au1000_update_tx_stats(dev, ptxd->status); + ptxd->len = 0; + } + + if (aup->tx_full) { + aup->tx_full = 0; + netif_wake_queue(dev); + } + + pDB = aup->tx_db_inuse[aup->tx_head]; + skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len); + if (skb->len < ETH_ZLEN) { + for (i = skb->len; i < ETH_ZLEN; i++) + ((char *)pDB->vaddr)[i] = 0; + + ptxd->len = ETH_ZLEN; + } else + ptxd->len = skb->len; + + ps->tx_packets++; + ps->tx_bytes += ptxd->len; + + ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE; + wmb(); /* drain writebuffer */ + dev_kfree_skb(skb); + aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1); + return NETDEV_TX_OK; +} + +/* + * The Tx ring has been full longer than the watchdog timeout + * value. The transmitter must be hung? + */ +static void au1000_tx_timeout(struct net_device *dev, unsigned int txqueue) +{ + netdev_err(dev, "au1000_tx_timeout: dev=%p\n", dev); + au1000_reset_mac(dev); + au1000_init(dev); + netif_trans_update(dev); /* prevent tx timeout */ + netif_wake_queue(dev); +} + +static void au1000_multicast_list(struct net_device *dev) +{ + struct au1000_private *aup = netdev_priv(dev); + u32 reg; + + netif_dbg(aup, drv, dev, "%s: flags=%x\n", __func__, dev->flags); + reg = readl(&aup->mac->control); + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + reg |= MAC_PROMISCUOUS; + } else if ((dev->flags & IFF_ALLMULTI) || + netdev_mc_count(dev) > MULTICAST_FILTER_LIMIT) { + reg |= MAC_PASS_ALL_MULTI; + reg &= ~MAC_PROMISCUOUS; + netdev_info(dev, "Pass all multicast\n"); + } else { + struct netdev_hw_addr *ha; + u32 mc_filter[2]; /* Multicast hash filter */ + + mc_filter[1] = mc_filter[0] = 0; + netdev_for_each_mc_addr(ha, dev) + set_bit(ether_crc(ETH_ALEN, ha->addr)>>26, + (long *)mc_filter); + writel(mc_filter[1], &aup->mac->multi_hash_high); + writel(mc_filter[0], &aup->mac->multi_hash_low); + reg &= ~MAC_PROMISCUOUS; + reg |= MAC_HASH_MODE; + } + writel(reg, &aup->mac->control); +} + +static const struct net_device_ops au1000_netdev_ops = { + .ndo_open = au1000_open, + .ndo_stop = au1000_close, + .ndo_start_xmit = au1000_tx, + .ndo_set_rx_mode = au1000_multicast_list, + .ndo_do_ioctl = phy_do_ioctl_running, + .ndo_tx_timeout = au1000_tx_timeout, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int au1000_probe(struct platform_device *pdev) +{ + struct au1000_private *aup = NULL; + struct au1000_eth_platform_data *pd; + struct net_device *dev = NULL; + struct db_dest *pDB, *pDBfree; + int irq, i, err = 0; + struct resource *base, *macen, *macdma; + + base = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!base) { + dev_err(&pdev->dev, "failed to retrieve base register\n"); + err = -ENODEV; + goto out; + } + + macen = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!macen) { + dev_err(&pdev->dev, "failed to retrieve MAC Enable register\n"); + err = -ENODEV; + goto out; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + err = -ENODEV; + goto out; + } + + macdma = platform_get_resource(pdev, IORESOURCE_MEM, 2); + if (!macdma) { + dev_err(&pdev->dev, "failed to retrieve MACDMA registers\n"); + err = -ENODEV; + goto out; + } + + if (!request_mem_region(base->start, resource_size(base), + pdev->name)) { + dev_err(&pdev->dev, "failed to request memory region for base registers\n"); + err = -ENXIO; + goto out; + } + + if (!request_mem_region(macen->start, resource_size(macen), + pdev->name)) { + dev_err(&pdev->dev, "failed to request memory region for MAC enable register\n"); + err = -ENXIO; + goto err_request; + } + + if (!request_mem_region(macdma->start, resource_size(macdma), + pdev->name)) { + dev_err(&pdev->dev, "failed to request MACDMA memory region\n"); + err = -ENXIO; + goto err_macdma; + } + + dev = alloc_etherdev(sizeof(struct au1000_private)); + if (!dev) { + err = -ENOMEM; + goto err_alloc; + } + + SET_NETDEV_DEV(dev, &pdev->dev); + platform_set_drvdata(pdev, dev); + aup = netdev_priv(dev); + + spin_lock_init(&aup->lock); + aup->msg_enable = (au1000_debug < 4 ? + AU1000_DEF_MSG_ENABLE : au1000_debug); + + /* Allocate the data buffers + * Snooping works fine with eth on all au1xxx + */ + aup->vaddr = (u32)dma_alloc_coherent(&pdev->dev, MAX_BUF_SIZE * + (NUM_TX_BUFFS + NUM_RX_BUFFS), + &aup->dma_addr, 0); + if (!aup->vaddr) { + dev_err(&pdev->dev, "failed to allocate data buffers\n"); + err = -ENOMEM; + goto err_vaddr; + } + + /* aup->mac is the base address of the MAC's registers */ + aup->mac = (struct mac_reg *) + ioremap(base->start, resource_size(base)); + if (!aup->mac) { + dev_err(&pdev->dev, "failed to ioremap MAC registers\n"); + err = -ENXIO; + goto err_remap1; + } + + /* Setup some variables for quick register address access */ + aup->enable = (u32 *)ioremap(macen->start, + resource_size(macen)); + if (!aup->enable) { + dev_err(&pdev->dev, "failed to ioremap MAC enable register\n"); + err = -ENXIO; + goto err_remap2; + } + aup->mac_id = pdev->id; + + aup->macdma = ioremap(macdma->start, resource_size(macdma)); + if (!aup->macdma) { + dev_err(&pdev->dev, "failed to ioremap MACDMA registers\n"); + err = -ENXIO; + goto err_remap3; + } + + au1000_setup_hw_rings(aup, aup->macdma); + + writel(0, aup->enable); + aup->mac_enabled = 0; + + pd = dev_get_platdata(&pdev->dev); + if (!pd) { + dev_info(&pdev->dev, "no platform_data passed," + " PHY search on MAC0\n"); + aup->phy1_search_mac0 = 1; + } else { + if (is_valid_ether_addr(pd->mac)) { + memcpy(dev->dev_addr, pd->mac, ETH_ALEN); + } else { + /* Set a random MAC since no valid provided by platform_data. */ + eth_hw_addr_random(dev); + } + + aup->phy_static_config = pd->phy_static_config; + aup->phy_search_highest_addr = pd->phy_search_highest_addr; + aup->phy1_search_mac0 = pd->phy1_search_mac0; + aup->phy_addr = pd->phy_addr; + aup->phy_busid = pd->phy_busid; + aup->phy_irq = pd->phy_irq; + } + + if (aup->phy_busid > 0) { + dev_err(&pdev->dev, "MAC0-associated PHY attached 2nd MACs MII bus not supported yet\n"); + err = -ENODEV; + goto err_mdiobus_alloc; + } + + aup->mii_bus = mdiobus_alloc(); + if (aup->mii_bus == NULL) { + dev_err(&pdev->dev, "failed to allocate mdiobus structure\n"); + err = -ENOMEM; + goto err_mdiobus_alloc; + } + + aup->mii_bus->priv = dev; + aup->mii_bus->read = au1000_mdiobus_read; + aup->mii_bus->write = au1000_mdiobus_write; + aup->mii_bus->reset = au1000_mdiobus_reset; + aup->mii_bus->name = "au1000_eth_mii"; + snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", + pdev->name, aup->mac_id); + + /* if known, set corresponding PHY IRQs */ + if (aup->phy_static_config) + if (aup->phy_irq && aup->phy_busid == aup->mac_id) + aup->mii_bus->irq[aup->phy_addr] = aup->phy_irq; + + err = mdiobus_register(aup->mii_bus); + if (err) { + dev_err(&pdev->dev, "failed to register MDIO bus\n"); + goto err_mdiobus_reg; + } + + err = au1000_mii_probe(dev); + if (err != 0) + goto err_out; + + pDBfree = NULL; + /* setup the data buffer descriptors and attach a buffer to each one */ + pDB = aup->db; + for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) { + pDB->pnext = pDBfree; + pDBfree = pDB; + pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i); + pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr); + pDB++; + } + aup->pDBfree = pDBfree; + + err = -ENODEV; + for (i = 0; i < NUM_RX_DMA; i++) { + pDB = au1000_GetFreeDB(aup); + if (!pDB) + goto err_out; + + aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; + aup->rx_db_inuse[i] = pDB; + } + + for (i = 0; i < NUM_TX_DMA; i++) { + pDB = au1000_GetFreeDB(aup); + if (!pDB) + goto err_out; + + aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; + aup->tx_dma_ring[i]->len = 0; + aup->tx_db_inuse[i] = pDB; + } + + dev->base_addr = base->start; + dev->irq = irq; + dev->netdev_ops = &au1000_netdev_ops; + dev->ethtool_ops = &au1000_ethtool_ops; + dev->watchdog_timeo = ETH_TX_TIMEOUT; + + /* + * The boot code uses the ethernet controller, so reset it to start + * fresh. au1000_init() expects that the device is in reset state. + */ + au1000_reset_mac(dev); + + err = register_netdev(dev); + if (err) { + netdev_err(dev, "Cannot register net device, aborting.\n"); + goto err_out; + } + + netdev_info(dev, "Au1xx0 Ethernet found at 0x%lx, irq %d\n", + (unsigned long)base->start, irq); + + return 0; + +err_out: + if (aup->mii_bus != NULL) + mdiobus_unregister(aup->mii_bus); + + /* here we should have a valid dev plus aup-> register addresses + * so we can reset the mac properly. + */ + au1000_reset_mac(dev); + + for (i = 0; i < NUM_RX_DMA; i++) { + if (aup->rx_db_inuse[i]) + au1000_ReleaseDB(aup, aup->rx_db_inuse[i]); + } + for (i = 0; i < NUM_TX_DMA; i++) { + if (aup->tx_db_inuse[i]) + au1000_ReleaseDB(aup, aup->tx_db_inuse[i]); + } +err_mdiobus_reg: + mdiobus_free(aup->mii_bus); +err_mdiobus_alloc: + iounmap(aup->macdma); +err_remap3: + iounmap(aup->enable); +err_remap2: + iounmap(aup->mac); +err_remap1: + dma_free_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), + (void *)aup->vaddr, aup->dma_addr); +err_vaddr: + free_netdev(dev); +err_alloc: + release_mem_region(macdma->start, resource_size(macdma)); +err_macdma: + release_mem_region(macen->start, resource_size(macen)); +err_request: + release_mem_region(base->start, resource_size(base)); +out: + return err; +} + +static int au1000_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct au1000_private *aup = netdev_priv(dev); + int i; + struct resource *base, *macen; + + unregister_netdev(dev); + mdiobus_unregister(aup->mii_bus); + mdiobus_free(aup->mii_bus); + + for (i = 0; i < NUM_RX_DMA; i++) + if (aup->rx_db_inuse[i]) + au1000_ReleaseDB(aup, aup->rx_db_inuse[i]); + + for (i = 0; i < NUM_TX_DMA; i++) + if (aup->tx_db_inuse[i]) + au1000_ReleaseDB(aup, aup->tx_db_inuse[i]); + + dma_free_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), + (void *)aup->vaddr, aup->dma_addr); + + iounmap(aup->macdma); + iounmap(aup->mac); + iounmap(aup->enable); + + base = platform_get_resource(pdev, IORESOURCE_MEM, 2); + release_mem_region(base->start, resource_size(base)); + + base = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(base->start, resource_size(base)); + + macen = platform_get_resource(pdev, IORESOURCE_MEM, 1); + release_mem_region(macen->start, resource_size(macen)); + + free_netdev(dev); + + return 0; +} + +static struct platform_driver au1000_eth_driver = { + .probe = au1000_probe, + .remove = au1000_remove, + .driver = { + .name = "au1000-eth", + }, +}; + +module_platform_driver(au1000_eth_driver); + +MODULE_ALIAS("platform:au1000-eth"); |