/* * 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" #define FEC5200_PHYADDR_NONE (-1) #define FEC5200_PHYADDR_7WIRE (-2) /* Private driver data structure */ struct mpc52xx_fec_priv { int duplex; int speed; 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; /* MDIO link details */ int phy_addr; unsigned int phy_speed; struct phy_device *phydev; enum phy_state link; }; 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_IFUP) 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.parent, 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.parent, 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; } } else if (priv->link) { new_state = 1; priv->link = PHY_DOWN; priv->speed = 0; priv->duplex = -1; } 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, sizeof(phy_id), "%x:%02x", (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->phy_addr < 0) 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->phydev) return; phy_disconnect(priv->phydev); /* power down phy */ phy_stop(priv->phydev); phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN); } static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv) { struct mpc52xx_fec __iomem *fec = priv->fec; if (priv->phydev) 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_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 NETDEV_TX_BUSY; } 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.parent, 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 NETDEV_TX_OK; } #ifdef CONFIG_NET_POLL_CONTROLLER static void mpc52xx_fec_poll_controller(struct net_device *dev) { struct mpc52xx_fec_priv *priv = netdev_priv(dev); disable_irq(priv->t_irq); mpc52xx_fec_tx_interrupt(priv->t_irq, dev); enable_irq(priv->t_irq); disable_irq(priv->r_irq); mpc52xx_fec_rx_interrupt(priv->r_irq, dev); enable_irq(priv->r_irq); } #endif /* 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.parent, 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.parent, bd->skb_pa, rskb->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.parent, 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); } 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.parent, skb->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 */ /* on fifo error, soft-reset fec */ if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { 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; } if (ievent & ~FEC_IEVENT_TFINT) dev_dbg(&dev->dev, "ievent: %08x\n", ievent); 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, offsetof(struct mpc52xx_fec, reserved10) - offsetof(struct mpc52xx_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->phy_addr != FEC5200_PHYADDR_7WIRE) 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); if (!priv->phydev) return -ENODEV; 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); if (!priv->phydev) return -ENODEV; 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); if (!priv->phydev) return -ENOTSUPP; return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd); } static const struct net_device_ops mpc52xx_fec_netdev_ops = { .ndo_open = mpc52xx_fec_open, .ndo_stop = mpc52xx_fec_close, .ndo_start_xmit = mpc52xx_fec_start_xmit, .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list, .ndo_set_mac_address = mpc52xx_fec_set_mac_address, .ndo_validate_addr = eth_validate_addr, .ndo_do_ioctl = mpc52xx_fec_ioctl, .ndo_change_mtu = eth_change_mtu, .ndo_tx_timeout = mpc52xx_fec_tx_timeout, .ndo_get_stats = mpc52xx_fec_get_stats, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = mpc52xx_fec_poll_controller, #endif }; /* ======================================================================== */ /* 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; struct device_node *phy_node; const phandle *phy_handle; const u32 *prop; int prop_size; 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->netdev_ops = &mpc52xx_fec_netdev_ops; ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops; ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT; ndev->base_addr = mem.start; 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); /* * Link mode configuration */ /* Start with safe defaults for link connection */ priv->phy_addr = FEC5200_PHYADDR_NONE; priv->speed = 100; priv->duplex = DUPLEX_HALF; priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1; /* the 7-wire property means don't use MII mode */ if (of_find_property(op->node, "fsl,7-wire-mode", NULL)) priv->phy_addr = FEC5200_PHYADDR_7WIRE; /* The current speed preconfigures the speed of the MII link */ prop = of_get_property(op->node, "current-speed", &prop_size); if (prop && (prop_size >= sizeof(u32) * 2)) { priv->speed = prop[0]; priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF; } /* If there is a phy handle, setup link to that phy */ phy_handle = of_get_property(op->node, "phy-handle", &prop_size); if (phy_handle && (prop_size >= sizeof(phandle))) { phy_node = of_find_node_by_phandle(*phy_handle); prop = of_get_property(phy_node, "reg", &prop_size); if (prop && (prop_size >= sizeof(u32))) if ((*prop >= 0) && (*prop < PHY_MAX_ADDR)) priv->phy_addr = *prop; of_node_put(phy_node); } /* Hardware init */ mpc52xx_fec_hw_init(ndev); mpc52xx_fec_reset_stats(ndev); SET_NETDEV_DEV(ndev, &op->dev); /* Register the new network device */ rv = register_netdev(ndev); if (rv < 0) goto probe_error; /* Now report the link setup */ switch (priv->phy_addr) { case FEC5200_PHYADDR_NONE: dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n", priv->speed, priv->duplex ? 'F' : 'H'); break; case FEC5200_PHYADDR_7WIRE: dev_info(&ndev->dev, "using 7-wire PHY mode\n"); break; default: dev_info(&ndev->dev, "Using PHY at MDIO address %i\n", priv->phy_addr); } /* 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[] = { { .compatible = "fsl,mpc5200b-fec", }, { .compatible = "fsl,mpc5200-fec", }, { .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");