diff options
author | Domen Puncer <domen.puncer@telargo.com> | 2007-10-26 18:07:49 +0200 |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2007-10-29 10:59:10 +0100 |
commit | 5d031e9e7e9ad5aa6516646f955c6262478e1acd (patch) | |
tree | 6cfe45ad29278e80f239cac39f52249d1bcbc851 | |
parent | Merge branch 'upstream-jeff' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff) | |
download | linux-5d031e9e7e9ad5aa6516646f955c6262478e1acd.tar.xz linux-5d031e9e7e9ad5aa6516646f955c6262478e1acd.zip |
FEC - fast ethernet controller for mpc52xx
Driver for ethernet on mpc5200/mpc5200b SoCs (FEC).
Signed-off-by: Domen Puncer <domen.puncer@telargo.com>
Acked-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r-- | drivers/net/Kconfig | 24 | ||||
-rw-r--r-- | drivers/net/Makefile | 4 | ||||
-rw-r--r-- | drivers/net/fec_mpc52xx.c | 1112 | ||||
-rw-r--r-- | drivers/net/fec_mpc52xx.h | 313 | ||||
-rw-r--r-- | drivers/net/fec_mpc52xx_phy.c | 198 |
5 files changed, 1651 insertions, 0 deletions
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 72d3447fb99b..867cb7345b5f 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -1881,6 +1881,30 @@ config FEC2 Say Y here if you want to use the second built-in 10/100 Fast ethernet controller on some Motorola ColdFire processors. +config FEC_MPC52xx + tristate "MPC52xx FEC driver" + depends on PPC_MPC52xx + select PPC_BESTCOMM + select PPC_BESTCOMM_FEC + select CRC32 + select PHYLIB + ---help--- + This option enables support for the MPC5200's on-chip + Fast Ethernet Controller + If compiled as module, it will be called 'fec_mpc52xx.ko'. + +config FEC_MPC52xx_MDIO + bool "MPC52xx FEC MDIO bus driver" + depends on FEC_MPC52xx + default y + ---help--- + The MPC5200's FEC can connect to the Ethernet either with + an external MII PHY chip or 10 Mbps 7-wire interface + (Motorola? industry standard). + If your board uses an external PHY connected to FEC, enable this. + If not sure, enable. + If compiled as module, it will be called 'fec_mpc52xx_phy.ko'. + config NE_H8300 tristate "NE2000 compatible support for H8/300" depends on H8300 diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 593262065c9b..0e5fde4a1b2c 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -96,6 +96,10 @@ obj-$(CONFIG_SHAPER) += shaper.o obj-$(CONFIG_HP100) += hp100.o obj-$(CONFIG_SMC9194) += smc9194.o obj-$(CONFIG_FEC) += fec.o +obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o +ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y) + obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o +endif obj-$(CONFIG_68360_ENET) += 68360enet.o obj-$(CONFIG_WD80x3) += wd.o 8390.o obj-$(CONFIG_EL2) += 3c503.o 8390.o diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c new file mode 100644 index 000000000000..fc1cf0b742b0 --- /dev/null +++ b/drivers/net/fec_mpc52xx.c @@ -0,0 +1,1112 @@ +/* + * Driver for the MPC5200 Fast Ethernet Controller + * + * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and + * now maintained by Sylvain Munaut <tnt@246tNt.com> + * + * Copyright (C) 2007 Domen Puncer, Telargo, Inc. + * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com> + * Copyright (C) 2003-2004 MontaVista, Software, Inc. + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + * + */ + +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/crc32.h> +#include <linux/hardirq.h> +#include <linux/delay.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/skbuff.h> + +#include <asm/io.h> +#include <asm/delay.h> +#include <asm/mpc52xx.h> + +#include <sysdev/bestcomm/bestcomm.h> +#include <sysdev/bestcomm/fec.h> + +#include "fec_mpc52xx.h" + +#define DRIVER_NAME "mpc52xx-fec" + +static irqreturn_t mpc52xx_fec_interrupt(int, void *); +static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *); +static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *); +static void mpc52xx_fec_stop(struct net_device *dev); +static void mpc52xx_fec_start(struct net_device *dev); +static void mpc52xx_fec_reset(struct net_device *dev); + +static u8 mpc52xx_fec_mac_addr[6]; +module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0); +MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe"); + +#define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \ + NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFDOWN ) +static int debug = -1; /* the above default */ +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "debugging messages level"); + +static void mpc52xx_fec_tx_timeout(struct net_device *dev) +{ + dev_warn(&dev->dev, "transmit timed out\n"); + + mpc52xx_fec_reset(dev); + + dev->stats.tx_errors++; + + netif_wake_queue(dev); +} + +static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + + out_be32(&fec->paddr1, *(u32 *)(&mac[0])); + out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE); +} + +static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + + *(u32 *)(&mac[0]) = in_be32(&fec->paddr1); + *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16; +} + +static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr) +{ + struct sockaddr *sock = addr; + + memcpy(dev->dev_addr, sock->sa_data, dev->addr_len); + + mpc52xx_fec_set_paddr(dev, sock->sa_data); + return 0; +} + +static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s) +{ + while (!bcom_queue_empty(s)) { + struct bcom_fec_bd *bd; + struct sk_buff *skb; + + skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd); + dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE); + kfree_skb(skb); + } +} + +static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk) +{ + while (!bcom_queue_full(rxtsk)) { + struct sk_buff *skb; + struct bcom_fec_bd *bd; + + skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE); + if (skb == NULL) + return -EAGAIN; + + /* zero out the initial receive buffers to aid debugging */ + memset(skb->data, 0, FEC_RX_BUFFER_SIZE); + + bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk); + + bd->status = FEC_RX_BUFFER_SIZE; + bd->skb_pa = dma_map_single(&dev->dev, skb->data, + FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE); + + bcom_submit_next_buffer(rxtsk, skb); + } + + return 0; +} + +/* based on generic_adjust_link from fs_enet-main.c */ +static void mpc52xx_fec_adjust_link(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct phy_device *phydev = priv->phydev; + int new_state = 0; + + if (phydev->link != PHY_DOWN) { + if (phydev->duplex != priv->duplex) { + struct mpc52xx_fec __iomem *fec = priv->fec; + u32 rcntrl; + u32 tcntrl; + + new_state = 1; + priv->duplex = phydev->duplex; + + rcntrl = in_be32(&fec->r_cntrl); + tcntrl = in_be32(&fec->x_cntrl); + + rcntrl &= ~FEC_RCNTRL_DRT; + tcntrl &= ~FEC_TCNTRL_FDEN; + if (phydev->duplex == DUPLEX_FULL) + tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */ + else + rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */ + + out_be32(&fec->r_cntrl, rcntrl); + out_be32(&fec->x_cntrl, tcntrl); + } + + if (phydev->speed != priv->speed) { + new_state = 1; + priv->speed = phydev->speed; + } + + if (priv->link == PHY_DOWN) { + new_state = 1; + priv->link = phydev->link; + netif_schedule(dev); + netif_carrier_on(dev); + netif_start_queue(dev); + } + + } else if (priv->link) { + new_state = 1; + priv->link = PHY_DOWN; + priv->speed = 0; + priv->duplex = -1; + netif_stop_queue(dev); + netif_carrier_off(dev); + } + + if (new_state && netif_msg_link(priv)) + phy_print_status(phydev); +} + +static int mpc52xx_fec_init_phy(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct phy_device *phydev; + char phy_id[BUS_ID_SIZE]; + + snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, + (unsigned int)dev->base_addr, priv->phy_addr); + + priv->link = PHY_DOWN; + priv->speed = 0; + priv->duplex = -1; + + phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII); + if (IS_ERR(phydev)) { + dev_err(&dev->dev, "phy_connect failed\n"); + return PTR_ERR(phydev); + } + dev_info(&dev->dev, "attached phy %i to driver %s\n", + phydev->addr, phydev->drv->name); + + priv->phydev = phydev; + + return 0; +} + +static int mpc52xx_fec_phy_start(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + int err; + + if (!priv->has_phy) + return 0; + + err = mpc52xx_fec_init_phy(dev); + if (err) { + dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n"); + return err; + } + + /* reset phy - this also wakes it from PDOWN */ + phy_write(priv->phydev, MII_BMCR, BMCR_RESET); + phy_start(priv->phydev); + + return 0; +} + +static void mpc52xx_fec_phy_stop(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + + if (!priv->has_phy) + return; + + phy_disconnect(priv->phydev); + /* power down phy */ + phy_stop(priv->phydev); + phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN); +} + +static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv, + struct mii_ioctl_data *mii_data, int cmd) +{ + if (!priv->has_phy) + return -ENOTSUPP; + + return phy_mii_ioctl(priv->phydev, mii_data, cmd); +} + +static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv) +{ + struct mpc52xx_fec __iomem *fec = priv->fec; + + if (!priv->has_phy) + return; + + out_be32(&fec->mii_speed, priv->phy_speed); +} + +static int mpc52xx_fec_open(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + int err = -EBUSY; + + if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED, + DRIVER_NAME "_ctrl", dev)) { + dev_err(&dev->dev, "ctrl interrupt request failed\n"); + goto out; + } + if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0, + DRIVER_NAME "_rx", dev)) { + dev_err(&dev->dev, "rx interrupt request failed\n"); + goto free_ctrl_irq; + } + if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0, + DRIVER_NAME "_tx", dev)) { + dev_err(&dev->dev, "tx interrupt request failed\n"); + goto free_2irqs; + } + + bcom_fec_rx_reset(priv->rx_dmatsk); + bcom_fec_tx_reset(priv->tx_dmatsk); + + err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk); + if (err) { + dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n"); + goto free_irqs; + } + + err = mpc52xx_fec_phy_start(dev); + if (err) + goto free_skbs; + + bcom_enable(priv->rx_dmatsk); + bcom_enable(priv->tx_dmatsk); + + mpc52xx_fec_start(dev); + + netif_start_queue(dev); + + return 0; + + free_skbs: + mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk); + + free_irqs: + free_irq(priv->t_irq, dev); + free_2irqs: + free_irq(priv->r_irq, dev); + free_ctrl_irq: + free_irq(dev->irq, dev); + out: + + return err; +} + +static int mpc52xx_fec_close(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + + netif_stop_queue(dev); + + mpc52xx_fec_stop(dev); + + mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk); + + free_irq(dev->irq, dev); + free_irq(priv->r_irq, dev); + free_irq(priv->t_irq, dev); + + mpc52xx_fec_phy_stop(dev); + + return 0; +} + +/* This will only be invoked if your driver is _not_ in XOFF state. + * What this means is that you need not check it, and that this + * invariant will hold if you make sure that the netif_*_queue() + * calls are done at the proper times. + */ +static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct bcom_fec_bd *bd; + + if (bcom_queue_full(priv->tx_dmatsk)) { + if (net_ratelimit()) + dev_err(&dev->dev, "transmit queue overrun\n"); + return 1; + } + + spin_lock_irq(&priv->lock); + dev->trans_start = jiffies; + + bd = (struct bcom_fec_bd *) + bcom_prepare_next_buffer(priv->tx_dmatsk); + + bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC; + bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE); + + bcom_submit_next_buffer(priv->tx_dmatsk, skb); + + if (bcom_queue_full(priv->tx_dmatsk)) { + netif_stop_queue(dev); + } + + spin_unlock_irq(&priv->lock); + + return 0; +} + +/* This handles BestComm transmit task interrupts + */ +static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + + spin_lock(&priv->lock); + + while (bcom_buffer_done(priv->tx_dmatsk)) { + struct sk_buff *skb; + struct bcom_fec_bd *bd; + skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL, + (struct bcom_bd **)&bd); + dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE); + + dev_kfree_skb_irq(skb); + } + + netif_wake_queue(dev); + + spin_unlock(&priv->lock); + + return IRQ_HANDLED; +} + +static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + + while (bcom_buffer_done(priv->rx_dmatsk)) { + struct sk_buff *skb; + struct sk_buff *rskb; + struct bcom_fec_bd *bd; + u32 status; + + rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status, + (struct bcom_bd **)&bd); + dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE); + + /* Test for errors in received frame */ + if (status & BCOM_FEC_RX_BD_ERRORS) { + /* Drop packet and reuse the buffer */ + bd = (struct bcom_fec_bd *) + bcom_prepare_next_buffer(priv->rx_dmatsk); + + bd->status = FEC_RX_BUFFER_SIZE; + bd->skb_pa = dma_map_single(&dev->dev, rskb->data, + FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE); + + bcom_submit_next_buffer(priv->rx_dmatsk, rskb); + + dev->stats.rx_dropped++; + + continue; + } + + /* skbs are allocated on open, so now we allocate a new one, + * and remove the old (with the packet) */ + skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE); + if (skb) { + /* Process the received skb */ + int length = status & BCOM_FEC_RX_BD_LEN_MASK; + + skb_put(rskb, length - 4); /* length without CRC32 */ + + rskb->dev = dev; + rskb->protocol = eth_type_trans(rskb, dev); + + netif_rx(rskb); + dev->last_rx = jiffies; + } else { + /* Can't get a new one : reuse the same & drop pkt */ + dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n"); + dev->stats.rx_dropped++; + + skb = rskb; + } + + bd = (struct bcom_fec_bd *) + bcom_prepare_next_buffer(priv->rx_dmatsk); + + bd->status = FEC_RX_BUFFER_SIZE; + bd->skb_pa = dma_map_single(&dev->dev, rskb->data, + FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE); + + bcom_submit_next_buffer(priv->rx_dmatsk, skb); + } + + return IRQ_HANDLED; +} + +static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + u32 ievent; + + ievent = in_be32(&fec->ievent); + + ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */ + if (!ievent) + return IRQ_NONE; + + out_be32(&fec->ievent, ievent); /* clear pending events */ + + if (ievent & ~(FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { + if (ievent & ~FEC_IEVENT_TFINT) + dev_dbg(&dev->dev, "ievent: %08x\n", ievent); + return IRQ_HANDLED; + } + + if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR)) + dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n"); + if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR)) + dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n"); + + mpc52xx_fec_reset(dev); + + netif_wake_queue(dev); + return IRQ_HANDLED; +} + +/* + * Get the current statistics. + * This may be called with the card open or closed. + */ +static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct net_device_stats *stats = &dev->stats; + struct mpc52xx_fec __iomem *fec = priv->fec; + + stats->rx_bytes = in_be32(&fec->rmon_r_octets); + stats->rx_packets = in_be32(&fec->rmon_r_packets); + stats->rx_errors = in_be32(&fec->rmon_r_crc_align) + + in_be32(&fec->rmon_r_undersize) + + in_be32(&fec->rmon_r_oversize) + + in_be32(&fec->rmon_r_frag) + + in_be32(&fec->rmon_r_jab); + + stats->tx_bytes = in_be32(&fec->rmon_t_octets); + stats->tx_packets = in_be32(&fec->rmon_t_packets); + stats->tx_errors = in_be32(&fec->rmon_t_crc_align) + + in_be32(&fec->rmon_t_undersize) + + in_be32(&fec->rmon_t_oversize) + + in_be32(&fec->rmon_t_frag) + + in_be32(&fec->rmon_t_jab); + + stats->multicast = in_be32(&fec->rmon_r_mc_pkt); + stats->collisions = in_be32(&fec->rmon_t_col); + + /* detailed rx_errors: */ + stats->rx_length_errors = in_be32(&fec->rmon_r_undersize) + + in_be32(&fec->rmon_r_oversize) + + in_be32(&fec->rmon_r_frag) + + in_be32(&fec->rmon_r_jab); + stats->rx_over_errors = in_be32(&fec->r_macerr); + stats->rx_crc_errors = in_be32(&fec->ieee_r_crc); + stats->rx_frame_errors = in_be32(&fec->ieee_r_align); + stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop); + stats->rx_missed_errors = in_be32(&fec->rmon_r_drop); + + /* detailed tx_errors: */ + stats->tx_aborted_errors = 0; + stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr); + stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop); + stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe); + stats->tx_window_errors = in_be32(&fec->ieee_t_lcol); + + return stats; +} + +/* + * Read MIB counters in order to reset them, + * then zero all the stats fields in memory + */ +static void mpc52xx_fec_reset_stats(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + + out_be32(&fec->mib_control, FEC_MIB_DISABLE); + memset_io(&fec->rmon_t_drop, 0, (__force u32)&fec->reserved10 - + (__force u32)&fec->rmon_t_drop); + out_be32(&fec->mib_control, 0); + + memset(&dev->stats, 0, sizeof(dev->stats)); +} + +/* + * Set or clear the multicast filter for this adaptor. + */ +static void mpc52xx_fec_set_multicast_list(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + u32 rx_control; + + rx_control = in_be32(&fec->r_cntrl); + + if (dev->flags & IFF_PROMISC) { + rx_control |= FEC_RCNTRL_PROM; + out_be32(&fec->r_cntrl, rx_control); + } else { + rx_control &= ~FEC_RCNTRL_PROM; + out_be32(&fec->r_cntrl, rx_control); + + if (dev->flags & IFF_ALLMULTI) { + out_be32(&fec->gaddr1, 0xffffffff); + out_be32(&fec->gaddr2, 0xffffffff); + } else { + u32 crc; + int i; + struct dev_mc_list *dmi; + u32 gaddr1 = 0x00000000; + u32 gaddr2 = 0x00000000; + + dmi = dev->mc_list; + for (i=0; i<dev->mc_count; i++) { + crc = ether_crc_le(6, dmi->dmi_addr) >> 26; + if (crc >= 32) + gaddr1 |= 1 << (crc-32); + else + gaddr2 |= 1 << crc; + dmi = dmi->next; + } + out_be32(&fec->gaddr1, gaddr1); + out_be32(&fec->gaddr2, gaddr2); + } + } +} + +/** + * mpc52xx_fec_hw_init + * @dev: network device + * + * Setup various hardware setting, only needed once on start + */ +static void mpc52xx_fec_hw_init(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + int i; + + /* Whack a reset. We should wait for this. */ + out_be32(&fec->ecntrl, FEC_ECNTRL_RESET); + for (i = 0; i < FEC_RESET_DELAY; ++i) { + if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0) + break; + udelay(1); + } + if (i == FEC_RESET_DELAY) + dev_err(&dev->dev, "FEC Reset timeout!\n"); + + /* set pause to 0x20 frames */ + out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20); + + /* high service request will be deasserted when there's < 7 bytes in fifo + * low service request will be deasserted when there's < 4*7 bytes in fifo + */ + out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7); + out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7); + + /* alarm when <= x bytes in FIFO */ + out_be32(&fec->rfifo_alarm, 0x0000030c); + out_be32(&fec->tfifo_alarm, 0x00000100); + + /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */ + out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B); + + /* enable crc generation */ + out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC); + out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */ + out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */ + + /* set phy speed. + * this can't be done in phy driver, since it needs to be called + * before fec stuff (even on resume) */ + mpc52xx_fec_phy_hw_init(priv); +} + +/** + * mpc52xx_fec_start + * @dev: network device + * + * This function is called to start or restart the FEC during a link + * change. This happens on fifo errors or when switching between half + * and full duplex. + */ +static void mpc52xx_fec_start(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + u32 rcntrl; + u32 tcntrl; + u32 tmp; + + /* clear sticky error bits */ + tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF; + out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp); + out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp); + + /* FIFOs will reset on mpc52xx_fec_enable */ + out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET); + + /* Set station address. */ + mpc52xx_fec_set_paddr(dev, dev->dev_addr); + + mpc52xx_fec_set_multicast_list(dev); + + /* set max frame len, enable flow control, select mii mode */ + rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */ + rcntrl |= FEC_RCNTRL_FCE; + + if (priv->has_phy) + rcntrl |= FEC_RCNTRL_MII_MODE; + + if (priv->duplex == DUPLEX_FULL) + tcntrl = FEC_TCNTRL_FDEN; /* FD enable */ + else { + rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */ + tcntrl = 0; + } + out_be32(&fec->r_cntrl, rcntrl); + out_be32(&fec->x_cntrl, tcntrl); + + /* Clear any outstanding interrupt. */ + out_be32(&fec->ievent, 0xffffffff); + + /* Enable interrupts we wish to service. */ + out_be32(&fec->imask, FEC_IMASK_ENABLE); + + /* And last, enable the transmit and receive processing. */ + out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN); + out_be32(&fec->r_des_active, 0x01000000); +} + +/** + * mpc52xx_fec_stop + * @dev: network device + * + * stop all activity on fec and empty dma buffers + */ +static void mpc52xx_fec_stop(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + unsigned long timeout; + + /* disable all interrupts */ + out_be32(&fec->imask, 0); + + /* Disable the rx task. */ + bcom_disable(priv->rx_dmatsk); + + /* Wait for tx queue to drain, but only if we're in process context */ + if (!in_interrupt()) { + timeout = jiffies + msecs_to_jiffies(2000); + while (time_before(jiffies, timeout) && + !bcom_queue_empty(priv->tx_dmatsk)) + msleep(100); + + if (time_after_eq(jiffies, timeout)) + dev_err(&dev->dev, "queues didn't drain\n"); +#if 1 + if (time_after_eq(jiffies, timeout)) { + dev_err(&dev->dev, " tx: index: %i, outdex: %i\n", + priv->tx_dmatsk->index, + priv->tx_dmatsk->outdex); + dev_err(&dev->dev, " rx: index: %i, outdex: %i\n", + priv->rx_dmatsk->index, + priv->rx_dmatsk->outdex); + } +#endif + } + + bcom_disable(priv->tx_dmatsk); + + /* Stop FEC */ + out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN); + + return; +} + +/* reset fec and bestcomm tasks */ +static void mpc52xx_fec_reset(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + struct mpc52xx_fec __iomem *fec = priv->fec; + + mpc52xx_fec_stop(dev); + + out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status)); + out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO); + + mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk); + + mpc52xx_fec_hw_init(dev); + + phy_stop(priv->phydev); + phy_write(priv->phydev, MII_BMCR, BMCR_RESET); + phy_start(priv->phydev); + + bcom_fec_rx_reset(priv->rx_dmatsk); + bcom_fec_tx_reset(priv->tx_dmatsk); + + mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk); + + bcom_enable(priv->rx_dmatsk); + bcom_enable(priv->tx_dmatsk); + + mpc52xx_fec_start(dev); +} + + +/* ethtool interface */ +static void mpc52xx_fec_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, DRIVER_NAME); +} + +static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + return phy_ethtool_gset(priv->phydev, cmd); +} + +static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + return phy_ethtool_sset(priv->phydev, cmd); +} + +static u32 mpc52xx_fec_get_msglevel(struct net_device *dev) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + return priv->msg_enable; +} + +static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + priv->msg_enable = level; +} + +static const struct ethtool_ops mpc52xx_fec_ethtool_ops = { + .get_drvinfo = mpc52xx_fec_get_drvinfo, + .get_settings = mpc52xx_fec_get_settings, + .set_settings = mpc52xx_fec_set_settings, + .get_link = ethtool_op_get_link, + .get_msglevel = mpc52xx_fec_get_msglevel, + .set_msglevel = mpc52xx_fec_set_msglevel, +}; + + +static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct mpc52xx_fec_priv *priv = netdev_priv(dev); + + return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd); +} + +/* ======================================================================== */ +/* OF Driver */ +/* ======================================================================== */ + +static int __devinit +mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match) +{ + int rv; + struct net_device *ndev; + struct mpc52xx_fec_priv *priv = NULL; + struct resource mem; + const phandle *ph; + + phys_addr_t rx_fifo; + phys_addr_t tx_fifo; + + /* Get the ether ndev & it's private zone */ + ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv)); + if (!ndev) + return -ENOMEM; + + priv = netdev_priv(ndev); + + /* Reserve FEC control zone */ + rv = of_address_to_resource(op->node, 0, &mem); + if (rv) { + printk(KERN_ERR DRIVER_NAME ": " + "Error while parsing device node resource\n" ); + return rv; + } + if ((mem.end - mem.start + 1) != sizeof(struct mpc52xx_fec)) { + printk(KERN_ERR DRIVER_NAME + " - invalid resource size (%lx != %x), check mpc52xx_devices.c\n", + (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec)); + return -EINVAL; + } + + if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME)) + return -EBUSY; + + /* Init ether ndev with what we have */ + ndev->open = mpc52xx_fec_open; + ndev->stop = mpc52xx_fec_close; + ndev->hard_start_xmit = mpc52xx_fec_hard_start_xmit; + ndev->do_ioctl = mpc52xx_fec_ioctl; + ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops; + ndev->get_stats = mpc52xx_fec_get_stats; + ndev->set_mac_address = mpc52xx_fec_set_mac_address; + ndev->set_multicast_list = mpc52xx_fec_set_multicast_list; + ndev->tx_timeout = mpc52xx_fec_tx_timeout; + ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT; + ndev->base_addr = mem.start; + + priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */ + + spin_lock_init(&priv->lock); + + /* ioremap the zones */ + priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec)); + + if (!priv->fec) { + rv = -ENOMEM; + goto probe_error; + } + + /* Bestcomm init */ + rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data); + tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data); + + priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE); + priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo); + + if (!priv->rx_dmatsk || !priv->tx_dmatsk) { + printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" ); + rv = -ENOMEM; + goto probe_error; + } + + /* Get the IRQ we need one by one */ + /* Control */ + ndev->irq = irq_of_parse_and_map(op->node, 0); + + /* RX */ + priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk); + + /* TX */ + priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk); + + /* MAC address init */ + if (!is_zero_ether_addr(mpc52xx_fec_mac_addr)) + memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6); + else + mpc52xx_fec_get_paddr(ndev, ndev->dev_addr); + + priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT); + priv->duplex = DUPLEX_FULL; + + /* is the phy present in device tree? */ + ph = of_get_property(op->node, "phy-handle", NULL); + if (ph) { + const unsigned int *prop; + struct device_node *phy_dn; + priv->has_phy = 1; + + phy_dn = of_find_node_by_phandle(*ph); + prop = of_get_property(phy_dn, "reg", NULL); + priv->phy_addr = *prop; + + of_node_put(phy_dn); + + /* Phy speed */ + priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1; + } else { + dev_info(&ndev->dev, "can't find \"phy-handle\" in device" + " tree, using 7-wire mode\n"); + } + + /* Hardware init */ + mpc52xx_fec_hw_init(ndev); + + mpc52xx_fec_reset_stats(ndev); + + /* Register the new network device */ + rv = register_netdev(ndev); + if (rv < 0) + goto probe_error; + + /* We're done ! */ + dev_set_drvdata(&op->dev, ndev); + + return 0; + + + /* Error handling - free everything that might be allocated */ +probe_error: + + irq_dispose_mapping(ndev->irq); + + if (priv->rx_dmatsk) + bcom_fec_rx_release(priv->rx_dmatsk); + if (priv->tx_dmatsk) + bcom_fec_tx_release(priv->tx_dmatsk); + + if (priv->fec) + iounmap(priv->fec); + + release_mem_region(mem.start, sizeof(struct mpc52xx_fec)); + + free_netdev(ndev); + + return rv; +} + +static int +mpc52xx_fec_remove(struct of_device *op) +{ + struct net_device *ndev; + struct mpc52xx_fec_priv *priv; + + ndev = dev_get_drvdata(&op->dev); + priv = netdev_priv(ndev); + + unregister_netdev(ndev); + + irq_dispose_mapping(ndev->irq); + + bcom_fec_rx_release(priv->rx_dmatsk); + bcom_fec_tx_release(priv->tx_dmatsk); + + iounmap(priv->fec); + + release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec)); + + free_netdev(ndev); + + dev_set_drvdata(&op->dev, NULL); + return 0; +} + +#ifdef CONFIG_PM +static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state) +{ + struct net_device *dev = dev_get_drvdata(&op->dev); + + if (netif_running(dev)) + mpc52xx_fec_close(dev); + + return 0; +} + +static int mpc52xx_fec_of_resume(struct of_device *op) +{ + struct net_device *dev = dev_get_drvdata(&op->dev); + + mpc52xx_fec_hw_init(dev); + mpc52xx_fec_reset_stats(dev); + + if (netif_running(dev)) + mpc52xx_fec_open(dev); + + return 0; +} +#endif + +static struct of_device_id mpc52xx_fec_match[] = { + { + .type = "network", + .compatible = "mpc5200-fec", + }, + { } +}; + +MODULE_DEVICE_TABLE(of, mpc52xx_fec_match); + +static struct of_platform_driver mpc52xx_fec_driver = { + .owner = THIS_MODULE, + .name = DRIVER_NAME, + .match_table = mpc52xx_fec_match, + .probe = mpc52xx_fec_probe, + .remove = mpc52xx_fec_remove, +#ifdef CONFIG_PM + .suspend = mpc52xx_fec_of_suspend, + .resume = mpc52xx_fec_of_resume, +#endif +}; + + +/* ======================================================================== */ +/* Module */ +/* ======================================================================== */ + +static int __init +mpc52xx_fec_init(void) +{ +#ifdef CONFIG_FEC_MPC52xx_MDIO + int ret; + ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver); + if (ret) { + printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n"); + return ret; + } +#endif + return of_register_platform_driver(&mpc52xx_fec_driver); +} + +static void __exit +mpc52xx_fec_exit(void) +{ + of_unregister_platform_driver(&mpc52xx_fec_driver); +#ifdef CONFIG_FEC_MPC52xx_MDIO + of_unregister_platform_driver(&mpc52xx_fec_mdio_driver); +#endif +} + + +module_init(mpc52xx_fec_init); +module_exit(mpc52xx_fec_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dale Farnsworth"); +MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC"); diff --git a/drivers/net/fec_mpc52xx.h b/drivers/net/fec_mpc52xx.h new file mode 100644 index 000000000000..8b1f75397b9a --- /dev/null +++ b/drivers/net/fec_mpc52xx.h @@ -0,0 +1,313 @@ +/* + * drivers/drivers/net/fec_mpc52xx/fec.h + * + * Driver for the MPC5200 Fast Ethernet Controller + * + * Author: Dale Farnsworth <dfarnsworth@mvista.com> + * + * 2003-2004 (c) MontaVista, Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ + +#ifndef __DRIVERS_NET_MPC52XX_FEC_H__ +#define __DRIVERS_NET_MPC52XX_FEC_H__ + +#include <linux/phy.h> + +/* Tunable constant */ +/* FEC_RX_BUFFER_SIZE includes 4 bytes for CRC32 */ +#define FEC_RX_BUFFER_SIZE 1522 /* max receive packet size */ +#define FEC_RX_NUM_BD 256 +#define FEC_TX_NUM_BD 64 + +#define FEC_RESET_DELAY 50 /* uS */ + +#define FEC_WATCHDOG_TIMEOUT ((400*HZ)/1000) + +struct mpc52xx_fec_priv { + int duplex; + int r_irq; + int t_irq; + struct mpc52xx_fec __iomem *fec; + struct bcom_task *rx_dmatsk; + struct bcom_task *tx_dmatsk; + spinlock_t lock; + int msg_enable; + + int has_phy; + unsigned int phy_speed; + unsigned int phy_addr; + struct phy_device *phydev; + enum phy_state link; + int speed; +}; + + +/* ======================================================================== */ +/* Hardware register sets & bits */ +/* ======================================================================== */ + +struct mpc52xx_fec { + u32 fec_id; /* FEC + 0x000 */ + u32 ievent; /* FEC + 0x004 */ + u32 imask; /* FEC + 0x008 */ + + u32 reserved0[1]; /* FEC + 0x00C */ + u32 r_des_active; /* FEC + 0x010 */ + u32 x_des_active; /* FEC + 0x014 */ + u32 r_des_active_cl; /* FEC + 0x018 */ + u32 x_des_active_cl; /* FEC + 0x01C */ + u32 ivent_set; /* FEC + 0x020 */ + u32 ecntrl; /* FEC + 0x024 */ + + u32 reserved1[6]; /* FEC + 0x028-03C */ + u32 mii_data; /* FEC + 0x040 */ + u32 mii_speed; /* FEC + 0x044 */ + u32 mii_status; /* FEC + 0x048 */ + + u32 reserved2[5]; /* FEC + 0x04C-05C */ + u32 mib_data; /* FEC + 0x060 */ + u32 mib_control; /* FEC + 0x064 */ + + u32 reserved3[6]; /* FEC + 0x068-7C */ + u32 r_activate; /* FEC + 0x080 */ + u32 r_cntrl; /* FEC + 0x084 */ + u32 r_hash; /* FEC + 0x088 */ + u32 r_data; /* FEC + 0x08C */ + u32 ar_done; /* FEC + 0x090 */ + u32 r_test; /* FEC + 0x094 */ + u32 r_mib; /* FEC + 0x098 */ + u32 r_da_low; /* FEC + 0x09C */ + u32 r_da_high; /* FEC + 0x0A0 */ + + u32 reserved4[7]; /* FEC + 0x0A4-0BC */ + u32 x_activate; /* FEC + 0x0C0 */ + u32 x_cntrl; /* FEC + 0x0C4 */ + u32 backoff; /* FEC + 0x0C8 */ + u32 x_data; /* FEC + 0x0CC */ + u32 x_status; /* FEC + 0x0D0 */ + u32 x_mib; /* FEC + 0x0D4 */ + u32 x_test; /* FEC + 0x0D8 */ + u32 fdxfc_da1; /* FEC + 0x0DC */ + u32 fdxfc_da2; /* FEC + 0x0E0 */ + u32 paddr1; /* FEC + 0x0E4 */ + u32 paddr2; /* FEC + 0x0E8 */ + u32 op_pause; /* FEC + 0x0EC */ + + u32 reserved5[4]; /* FEC + 0x0F0-0FC */ + u32 instr_reg; /* FEC + 0x100 */ + u32 context_reg; /* FEC + 0x104 */ + u32 test_cntrl; /* FEC + 0x108 */ + u32 acc_reg; /* FEC + 0x10C */ + u32 ones; /* FEC + 0x110 */ + u32 zeros; /* FEC + 0x114 */ + u32 iaddr1; /* FEC + 0x118 */ + u32 iaddr2; /* FEC + 0x11C */ + u32 gaddr1; /* FEC + 0x120 */ + u32 gaddr2; /* FEC + 0x124 */ + u32 random; /* FEC + 0x128 */ + u32 rand1; /* FEC + 0x12C */ + u32 tmp; /* FEC + 0x130 */ + + u32 reserved6[3]; /* FEC + 0x134-13C */ + u32 fifo_id; /* FEC + 0x140 */ + u32 x_wmrk; /* FEC + 0x144 */ + u32 fcntrl; /* FEC + 0x148 */ + u32 r_bound; /* FEC + 0x14C */ + u32 r_fstart; /* FEC + 0x150 */ + u32 r_count; /* FEC + 0x154 */ + u32 r_lag; /* FEC + 0x158 */ + u32 r_read; /* FEC + 0x15C */ + u32 r_write; /* FEC + 0x160 */ + u32 x_count; /* FEC + 0x164 */ + u32 x_lag; /* FEC + 0x168 */ + u32 x_retry; /* FEC + 0x16C */ + u32 x_write; /* FEC + 0x170 */ + u32 x_read; /* FEC + 0x174 */ + + u32 reserved7[2]; /* FEC + 0x178-17C */ + u32 fm_cntrl; /* FEC + 0x180 */ + u32 rfifo_data; /* FEC + 0x184 */ + u32 rfifo_status; /* FEC + 0x188 */ + u32 rfifo_cntrl; /* FEC + 0x18C */ + u32 rfifo_lrf_ptr; /* FEC + 0x190 */ + u32 rfifo_lwf_ptr; /* FEC + 0x194 */ + u32 rfifo_alarm; /* FEC + 0x198 */ + u32 rfifo_rdptr; /* FEC + 0x19C */ + u32 rfifo_wrptr; /* FEC + 0x1A0 */ + u32 tfifo_data; /* FEC + 0x1A4 */ + u32 tfifo_status; /* FEC + 0x1A8 */ + u32 tfifo_cntrl; /* FEC + 0x1AC */ + u32 tfifo_lrf_ptr; /* FEC + 0x1B0 */ + u32 tfifo_lwf_ptr; /* FEC + 0x1B4 */ + u32 tfifo_alarm; /* FEC + 0x1B8 */ + u32 tfifo_rdptr; /* FEC + 0x1BC */ + u32 tfifo_wrptr; /* FEC + 0x1C0 */ + + u32 reset_cntrl; /* FEC + 0x1C4 */ + u32 xmit_fsm; /* FEC + 0x1C8 */ + + u32 reserved8[3]; /* FEC + 0x1CC-1D4 */ + u32 rdes_data0; /* FEC + 0x1D8 */ + u32 rdes_data1; /* FEC + 0x1DC */ + u32 r_length; /* FEC + 0x1E0 */ + u32 x_length; /* FEC + 0x1E4 */ + u32 x_addr; /* FEC + 0x1E8 */ + u32 cdes_data; /* FEC + 0x1EC */ + u32 status; /* FEC + 0x1F0 */ + u32 dma_control; /* FEC + 0x1F4 */ + u32 des_cmnd; /* FEC + 0x1F8 */ + u32 data; /* FEC + 0x1FC */ + + u32 rmon_t_drop; /* FEC + 0x200 */ + u32 rmon_t_packets; /* FEC + 0x204 */ + u32 rmon_t_bc_pkt; /* FEC + 0x208 */ + u32 rmon_t_mc_pkt; /* FEC + 0x20C */ + u32 rmon_t_crc_align; /* FEC + 0x210 */ + u32 rmon_t_undersize; /* FEC + 0x214 */ + u32 rmon_t_oversize; /* FEC + 0x218 */ + u32 rmon_t_frag; /* FEC + 0x21C */ + u32 rmon_t_jab; /* FEC + 0x220 */ + u32 rmon_t_col; /* FEC + 0x224 */ + u32 rmon_t_p64; /* FEC + 0x228 */ + u32 rmon_t_p65to127; /* FEC + 0x22C */ + u32 rmon_t_p128to255; /* FEC + 0x230 */ + u32 rmon_t_p256to511; /* FEC + 0x234 */ + u32 rmon_t_p512to1023; /* FEC + 0x238 */ + u32 rmon_t_p1024to2047; /* FEC + 0x23C */ + u32 rmon_t_p_gte2048; /* FEC + 0x240 */ + u32 rmon_t_octets; /* FEC + 0x244 */ + u32 ieee_t_drop; /* FEC + 0x248 */ + u32 ieee_t_frame_ok; /* FEC + 0x24C */ + u32 ieee_t_1col; /* FEC + 0x250 */ + u32 ieee_t_mcol; /* FEC + 0x254 */ + u32 ieee_t_def; /* FEC + 0x258 */ + u32 ieee_t_lcol; /* FEC + 0x25C */ + u32 ieee_t_excol; /* FEC + 0x260 */ + u32 ieee_t_macerr; /* FEC + 0x264 */ + u32 ieee_t_cserr; /* FEC + 0x268 */ + u32 ieee_t_sqe; /* FEC + 0x26C */ + u32 t_fdxfc; /* FEC + 0x270 */ + u32 ieee_t_octets_ok; /* FEC + 0x274 */ + + u32 reserved9[2]; /* FEC + 0x278-27C */ + u32 rmon_r_drop; /* FEC + 0x280 */ + u32 rmon_r_packets; /* FEC + 0x284 */ + u32 rmon_r_bc_pkt; /* FEC + 0x288 */ + u32 rmon_r_mc_pkt; /* FEC + 0x28C */ + u32 rmon_r_crc_align; /* FEC + 0x290 */ + u32 rmon_r_undersize; /* FEC + 0x294 */ + u32 rmon_r_oversize; /* FEC + 0x298 */ + u32 rmon_r_frag; /* FEC + 0x29C */ + u32 rmon_r_jab; /* FEC + 0x2A0 */ + + u32 rmon_r_resvd_0; /* FEC + 0x2A4 */ + + u32 rmon_r_p64; /* FEC + 0x2A8 */ + u32 rmon_r_p65to127; /* FEC + 0x2AC */ + u32 rmon_r_p128to255; /* FEC + 0x2B0 */ + u32 rmon_r_p256to511; /* FEC + 0x2B4 */ + u32 rmon_r_p512to1023; /* FEC + 0x2B8 */ + u32 rmon_r_p1024to2047; /* FEC + 0x2BC */ + u32 rmon_r_p_gte2048; /* FEC + 0x2C0 */ + u32 rmon_r_octets; /* FEC + 0x2C4 */ + u32 ieee_r_drop; /* FEC + 0x2C8 */ + u32 ieee_r_frame_ok; /* FEC + 0x2CC */ + u32 ieee_r_crc; /* FEC + 0x2D0 */ + u32 ieee_r_align; /* FEC + 0x2D4 */ + u32 r_macerr; /* FEC + 0x2D8 */ + u32 r_fdxfc; /* FEC + 0x2DC */ + u32 ieee_r_octets_ok; /* FEC + 0x2E0 */ + + u32 reserved10[7]; /* FEC + 0x2E4-2FC */ + + u32 reserved11[64]; /* FEC + 0x300-3FF */ +}; + +#define FEC_MIB_DISABLE 0x80000000 + +#define FEC_IEVENT_HBERR 0x80000000 +#define FEC_IEVENT_BABR 0x40000000 +#define FEC_IEVENT_BABT 0x20000000 +#define FEC_IEVENT_GRA 0x10000000 +#define FEC_IEVENT_TFINT 0x08000000 +#define FEC_IEVENT_MII 0x00800000 +#define FEC_IEVENT_LATE_COL 0x00200000 +#define FEC_IEVENT_COL_RETRY_LIM 0x00100000 +#define FEC_IEVENT_XFIFO_UN 0x00080000 +#define FEC_IEVENT_XFIFO_ERROR 0x00040000 +#define FEC_IEVENT_RFIFO_ERROR 0x00020000 + +#define FEC_IMASK_HBERR 0x80000000 +#define FEC_IMASK_BABR 0x40000000 +#define FEC_IMASK_BABT 0x20000000 +#define FEC_IMASK_GRA 0x10000000 +#define FEC_IMASK_MII 0x00800000 +#define FEC_IMASK_LATE_COL 0x00200000 +#define FEC_IMASK_COL_RETRY_LIM 0x00100000 +#define FEC_IMASK_XFIFO_UN 0x00080000 +#define FEC_IMASK_XFIFO_ERROR 0x00040000 +#define FEC_IMASK_RFIFO_ERROR 0x00020000 + +/* all but MII, which is enabled separately */ +#define FEC_IMASK_ENABLE (FEC_IMASK_HBERR | FEC_IMASK_BABR | \ + FEC_IMASK_BABT | FEC_IMASK_GRA | FEC_IMASK_LATE_COL | \ + FEC_IMASK_COL_RETRY_LIM | FEC_IMASK_XFIFO_UN | \ + FEC_IMASK_XFIFO_ERROR | FEC_IMASK_RFIFO_ERROR) + +#define FEC_RCNTRL_MAX_FL_SHIFT 16 +#define FEC_RCNTRL_LOOP 0x01 +#define FEC_RCNTRL_DRT 0x02 +#define FEC_RCNTRL_MII_MODE 0x04 +#define FEC_RCNTRL_PROM 0x08 +#define FEC_RCNTRL_BC_REJ 0x10 +#define FEC_RCNTRL_FCE 0x20 + +#define FEC_TCNTRL_GTS 0x00000001 +#define FEC_TCNTRL_HBC 0x00000002 +#define FEC_TCNTRL_FDEN 0x00000004 +#define FEC_TCNTRL_TFC_PAUSE 0x00000008 +#define FEC_TCNTRL_RFC_PAUSE 0x00000010 + +#define FEC_ECNTRL_RESET 0x00000001 +#define FEC_ECNTRL_ETHER_EN 0x00000002 + +#define FEC_MII_DATA_ST 0x40000000 /* Start frame */ +#define FEC_MII_DATA_OP_RD 0x20000000 /* Perform read */ +#define FEC_MII_DATA_OP_WR 0x10000000 /* Perform write */ +#define FEC_MII_DATA_PA_MSK 0x0f800000 /* PHY Address mask */ +#define FEC_MII_DATA_RA_MSK 0x007c0000 /* PHY Register mask */ +#define FEC_MII_DATA_TA 0x00020000 /* Turnaround */ +#define FEC_MII_DATA_DATAMSK 0x0000ffff /* PHY data mask */ + +#define FEC_MII_READ_FRAME (FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA) +#define FEC_MII_WRITE_FRAME (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR | FEC_MII_DATA_TA) + +#define FEC_MII_DATA_RA_SHIFT 0x12 /* MII reg addr bits */ +#define FEC_MII_DATA_PA_SHIFT 0x17 /* MII PHY addr bits */ + +#define FEC_PADDR2_TYPE 0x8808 + +#define FEC_OP_PAUSE_OPCODE 0x00010000 + +#define FEC_FIFO_WMRK_256B 0x3 + +#define FEC_FIFO_STATUS_ERR 0x00400000 +#define FEC_FIFO_STATUS_UF 0x00200000 +#define FEC_FIFO_STATUS_OF 0x00100000 + +#define FEC_FIFO_CNTRL_FRAME 0x08000000 +#define FEC_FIFO_CNTRL_LTG_7 0x07000000 + +#define FEC_RESET_CNTRL_RESET_FIFO 0x02000000 +#define FEC_RESET_CNTRL_ENABLE_IS_RESET 0x01000000 + +#define FEC_XMIT_FSM_APPEND_CRC 0x02000000 +#define FEC_XMIT_FSM_ENABLE_CRC 0x01000000 + + +extern struct of_platform_driver mpc52xx_fec_mdio_driver; + +#endif /* __DRIVERS_NET_MPC52XX_FEC_H__ */ diff --git a/drivers/net/fec_mpc52xx_phy.c b/drivers/net/fec_mpc52xx_phy.c new file mode 100644 index 000000000000..ba6e8b218e0a --- /dev/null +++ b/drivers/net/fec_mpc52xx_phy.c @@ -0,0 +1,198 @@ +/* + * Driver for the MPC5200 Fast Ethernet Controller - MDIO bus driver + * + * Copyright (C) 2007 Domen Puncer, Telargo, Inc. + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/phy.h> +#include <linux/of_platform.h> +#include <asm/io.h> +#include <asm/mpc52xx.h> +#include "fec_mpc52xx.h" + +struct mpc52xx_fec_mdio_priv { + struct mpc52xx_fec __iomem *regs; +}; + +static int mpc52xx_fec_mdio_read(struct mii_bus *bus, int phy_id, int reg) +{ + struct mpc52xx_fec_mdio_priv *priv = bus->priv; + struct mpc52xx_fec __iomem *fec; + int tries = 100; + u32 request = FEC_MII_READ_FRAME; + + fec = priv->regs; + out_be32(&fec->ievent, FEC_IEVENT_MII); + + request |= (phy_id << FEC_MII_DATA_PA_SHIFT) & FEC_MII_DATA_PA_MSK; + request |= (reg << FEC_MII_DATA_RA_SHIFT) & FEC_MII_DATA_RA_MSK; + + out_be32(&priv->regs->mii_data, request); + + /* wait for it to finish, this takes about 23 us on lite5200b */ + while (!(in_be32(&fec->ievent) & FEC_IEVENT_MII) && --tries) + udelay(5); + + if (tries == 0) + return -ETIMEDOUT; + + return in_be32(&priv->regs->mii_data) & FEC_MII_DATA_DATAMSK; +} + +static int mpc52xx_fec_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 data) +{ + struct mpc52xx_fec_mdio_priv *priv = bus->priv; + struct mpc52xx_fec __iomem *fec; + u32 value = data; + int tries = 100; + + fec = priv->regs; + out_be32(&fec->ievent, FEC_IEVENT_MII); + + value |= FEC_MII_WRITE_FRAME; + value |= (phy_id << FEC_MII_DATA_PA_SHIFT) & FEC_MII_DATA_PA_MSK; + value |= (reg << FEC_MII_DATA_RA_SHIFT) & FEC_MII_DATA_RA_MSK; + + out_be32(&priv->regs->mii_data, value); + + /* wait for request to finish */ + while (!(in_be32(&fec->ievent) & FEC_IEVENT_MII) && --tries) + udelay(5); + + if (tries == 0) + return -ETIMEDOUT; + + return 0; +} + +static int mpc52xx_fec_mdio_probe(struct of_device *of, const struct of_device_id *match) +{ + struct device *dev = &of->dev; + struct device_node *np = of->node; + struct device_node *child = NULL; + struct mii_bus *bus; + struct mpc52xx_fec_mdio_priv *priv; + struct resource res = {}; + int err; + int i; + + bus = kzalloc(sizeof(*bus), GFP_KERNEL); + if (bus == NULL) + return -ENOMEM; + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (priv == NULL) { + err = -ENOMEM; + goto out_free; + } + + bus->name = "mpc52xx MII bus"; + bus->read = mpc52xx_fec_mdio_read; + bus->write = mpc52xx_fec_mdio_write; + + /* setup irqs */ + bus->irq = kmalloc(sizeof(bus->irq[0]) * PHY_MAX_ADDR, GFP_KERNEL); + if (bus->irq == NULL) { + err = -ENOMEM; + goto out_free; + } + for (i=0; i<PHY_MAX_ADDR; i++) + bus->irq[i] = PHY_POLL; + + while ((child = of_get_next_child(np, child)) != NULL) { + int irq = irq_of_parse_and_map(child, 0); + if (irq != NO_IRQ) { + const u32 *id = of_get_property(child, "reg", NULL); + bus->irq[*id] = irq; + } + } + + /* setup registers */ + err = of_address_to_resource(np, 0, &res); + if (err) + goto out_free; + priv->regs = ioremap(res.start, res.end - res.start + 1); + if (priv->regs == NULL) { + err = -ENOMEM; + goto out_free; + } + + bus->id = res.start; + bus->priv = priv; + + bus->dev = dev; + dev_set_drvdata(dev, bus); + + /* set MII speed */ + out_be32(&priv->regs->mii_speed, ((mpc52xx_find_ipb_freq(of->node) >> 20) / 5) << 1); + + /* enable MII interrupt */ + out_be32(&priv->regs->imask, in_be32(&priv->regs->imask) | FEC_IMASK_MII); + + err = mdiobus_register(bus); + if (err) + goto out_unmap; + + return 0; + + out_unmap: + iounmap(priv->regs); + out_free: + for (i=0; i<PHY_MAX_ADDR; i++) + if (bus->irq[i] != PHY_POLL) + irq_dispose_mapping(bus->irq[i]); + kfree(bus->irq); + kfree(priv); + kfree(bus); + + return err; +} + +static int mpc52xx_fec_mdio_remove(struct of_device *of) +{ + struct device *dev = &of->dev; + struct mii_bus *bus = dev_get_drvdata(dev); + struct mpc52xx_fec_mdio_priv *priv = bus->priv; + int i; + + mdiobus_unregister(bus); + dev_set_drvdata(dev, NULL); + + iounmap(priv->regs); + for (i=0; i<PHY_MAX_ADDR; i++) + if (bus->irq[i]) + irq_dispose_mapping(bus->irq[i]); + kfree(priv); + kfree(bus->irq); + kfree(bus); + + return 0; +} + + +static struct of_device_id mpc52xx_fec_mdio_match[] = { + { + .type = "mdio", + .compatible = "mpc5200b-fec-phy", + }, + {}, +}; + +struct of_platform_driver mpc52xx_fec_mdio_driver = { + .name = "mpc5200b-fec-phy", + .probe = mpc52xx_fec_mdio_probe, + .remove = mpc52xx_fec_mdio_remove, + .match_table = mpc52xx_fec_mdio_match, +}; + +/* let fec driver call it, since this has to be registered before it */ +EXPORT_SYMBOL_GPL(mpc52xx_fec_mdio_driver); + + +MODULE_LICENSE("Dual BSD/GPL"); |