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1078 lines
28 KiB
1078 lines
28 KiB
/* |
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* Driver for the MPC5200 Fast Ethernet Controller |
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* |
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* Originally written by Dale Farnsworth <[email protected]> and |
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* now maintained by Sylvain Munaut <[email protected]> |
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* |
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* Copyright (C) 2007 Domen Puncer, Telargo, Inc. |
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* Copyright (C) 2007 Sylvain Munaut <[email protected]> |
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* Copyright (C) 2003-2004 MontaVista, Software, Inc. |
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* |
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* This file is licensed under the terms of the GNU General Public License |
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* version 2. This program is licensed "as is" without any warranty of any |
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* kind, whether express or implied. |
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* |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/dma-mapping.h> |
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#include <linux/module.h> |
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|
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/spinlock.h> |
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#include <linux/slab.h> |
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#include <linux/errno.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/crc32.h> |
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#include <linux/hardirq.h> |
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#include <linux/delay.h> |
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#include <linux/of_device.h> |
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#include <linux/of_mdio.h> |
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#include <linux/of_net.h> |
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#include <linux/of_platform.h> |
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|
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/ethtool.h> |
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#include <linux/skbuff.h> |
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|
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#include <asm/io.h> |
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#include <asm/delay.h> |
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#include <asm/mpc52xx.h> |
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|
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#include <linux/fsl/bestcomm/bestcomm.h> |
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#include <linux/fsl/bestcomm/fec.h> |
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|
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#include "fec_mpc52xx.h" |
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|
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#define DRIVER_NAME "mpc52xx-fec" |
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|
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/* Private driver data structure */ |
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struct mpc52xx_fec_priv { |
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struct net_device *ndev; |
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int duplex; |
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int speed; |
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int r_irq; |
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int t_irq; |
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struct mpc52xx_fec __iomem *fec; |
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struct bcom_task *rx_dmatsk; |
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struct bcom_task *tx_dmatsk; |
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spinlock_t lock; |
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int msg_enable; |
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|
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/* MDIO link details */ |
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unsigned int mdio_speed; |
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struct device_node *phy_node; |
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enum phy_state link; |
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int seven_wire_mode; |
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}; |
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|
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static irqreturn_t mpc52xx_fec_interrupt(int, void *); |
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static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *); |
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static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *); |
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static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep); |
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static void mpc52xx_fec_start(struct net_device *dev); |
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static void mpc52xx_fec_reset(struct net_device *dev); |
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#define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \ |
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NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) |
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static int debug = -1; /* the above default */ |
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module_param(debug, int, 0); |
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MODULE_PARM_DESC(debug, "debugging messages level"); |
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|
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static void mpc52xx_fec_tx_timeout(struct net_device *dev, unsigned int txqueue) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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unsigned long flags; |
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|
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dev_warn(&dev->dev, "transmit timed out\n"); |
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|
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spin_lock_irqsave(&priv->lock, flags); |
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mpc52xx_fec_reset(dev); |
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dev->stats.tx_errors++; |
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spin_unlock_irqrestore(&priv->lock, flags); |
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|
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netif_wake_queue(dev); |
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} |
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|
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static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct mpc52xx_fec __iomem *fec = priv->fec; |
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|
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out_be32(&fec->paddr1, *(u32 *)(&mac[0])); |
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out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE); |
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} |
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|
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static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr) |
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{ |
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struct sockaddr *sock = addr; |
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|
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memcpy(dev->dev_addr, sock->sa_data, dev->addr_len); |
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|
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mpc52xx_fec_set_paddr(dev, sock->sa_data); |
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return 0; |
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} |
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|
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static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s) |
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{ |
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while (!bcom_queue_empty(s)) { |
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struct bcom_fec_bd *bd; |
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struct sk_buff *skb; |
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|
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skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd); |
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dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len, |
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DMA_FROM_DEVICE); |
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kfree_skb(skb); |
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} |
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} |
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|
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static void |
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mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct bcom_fec_bd *bd; |
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|
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bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk); |
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bd->status = FEC_RX_BUFFER_SIZE; |
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bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data, |
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FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE); |
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bcom_submit_next_buffer(priv->rx_dmatsk, rskb); |
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} |
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|
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static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk) |
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{ |
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struct sk_buff *skb; |
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|
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while (!bcom_queue_full(rxtsk)) { |
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skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE); |
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if (!skb) |
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return -EAGAIN; |
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|
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/* zero out the initial receive buffers to aid debugging */ |
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memset(skb->data, 0, FEC_RX_BUFFER_SIZE); |
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mpc52xx_fec_rx_submit(dev, skb); |
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} |
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return 0; |
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} |
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|
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/* based on generic_adjust_link from fs_enet-main.c */ |
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static void mpc52xx_fec_adjust_link(struct net_device *dev) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct phy_device *phydev = dev->phydev; |
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int new_state = 0; |
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|
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if (phydev->link != PHY_DOWN) { |
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if (phydev->duplex != priv->duplex) { |
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struct mpc52xx_fec __iomem *fec = priv->fec; |
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u32 rcntrl; |
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u32 tcntrl; |
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|
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new_state = 1; |
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priv->duplex = phydev->duplex; |
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rcntrl = in_be32(&fec->r_cntrl); |
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tcntrl = in_be32(&fec->x_cntrl); |
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|
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rcntrl &= ~FEC_RCNTRL_DRT; |
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tcntrl &= ~FEC_TCNTRL_FDEN; |
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if (phydev->duplex == DUPLEX_FULL) |
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tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */ |
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else |
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rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */ |
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|
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out_be32(&fec->r_cntrl, rcntrl); |
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out_be32(&fec->x_cntrl, tcntrl); |
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} |
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|
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if (phydev->speed != priv->speed) { |
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new_state = 1; |
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priv->speed = phydev->speed; |
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} |
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|
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if (priv->link == PHY_DOWN) { |
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new_state = 1; |
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priv->link = phydev->link; |
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} |
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} else if (priv->link) { |
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new_state = 1; |
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priv->link = PHY_DOWN; |
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priv->speed = 0; |
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priv->duplex = -1; |
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} |
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if (new_state && netif_msg_link(priv)) |
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phy_print_status(phydev); |
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} |
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static int mpc52xx_fec_open(struct net_device *dev) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct phy_device *phydev = NULL; |
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int err = -EBUSY; |
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|
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if (priv->phy_node) { |
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phydev = of_phy_connect(priv->ndev, priv->phy_node, |
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mpc52xx_fec_adjust_link, 0, 0); |
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if (!phydev) { |
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dev_err(&dev->dev, "of_phy_connect failed\n"); |
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return -ENODEV; |
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} |
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phy_start(phydev); |
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} |
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if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED, |
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DRIVER_NAME "_ctrl", dev)) { |
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dev_err(&dev->dev, "ctrl interrupt request failed\n"); |
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goto free_phy; |
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} |
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if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0, |
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DRIVER_NAME "_rx", dev)) { |
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dev_err(&dev->dev, "rx interrupt request failed\n"); |
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goto free_ctrl_irq; |
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} |
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if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0, |
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DRIVER_NAME "_tx", dev)) { |
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dev_err(&dev->dev, "tx interrupt request failed\n"); |
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goto free_2irqs; |
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} |
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bcom_fec_rx_reset(priv->rx_dmatsk); |
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bcom_fec_tx_reset(priv->tx_dmatsk); |
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err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk); |
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if (err) { |
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dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n"); |
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goto free_irqs; |
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} |
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bcom_enable(priv->rx_dmatsk); |
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bcom_enable(priv->tx_dmatsk); |
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mpc52xx_fec_start(dev); |
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netif_start_queue(dev); |
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return 0; |
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free_irqs: |
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free_irq(priv->t_irq, dev); |
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free_2irqs: |
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free_irq(priv->r_irq, dev); |
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free_ctrl_irq: |
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free_irq(dev->irq, dev); |
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free_phy: |
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if (phydev) { |
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phy_stop(phydev); |
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phy_disconnect(phydev); |
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} |
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return err; |
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} |
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static int mpc52xx_fec_close(struct net_device *dev) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct phy_device *phydev = dev->phydev; |
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netif_stop_queue(dev); |
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mpc52xx_fec_stop(dev, true); |
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mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk); |
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free_irq(dev->irq, dev); |
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free_irq(priv->r_irq, dev); |
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free_irq(priv->t_irq, dev); |
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if (phydev) { |
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/* power down phy */ |
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phy_stop(phydev); |
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phy_disconnect(phydev); |
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} |
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return 0; |
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} |
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/* This will only be invoked if your driver is _not_ in XOFF state. |
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* What this means is that you need not check it, and that this |
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* invariant will hold if you make sure that the netif_*_queue() |
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* calls are done at the proper times. |
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*/ |
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static netdev_tx_t |
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mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct bcom_fec_bd *bd; |
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unsigned long flags; |
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if (bcom_queue_full(priv->tx_dmatsk)) { |
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if (net_ratelimit()) |
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dev_err(&dev->dev, "transmit queue overrun\n"); |
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return NETDEV_TX_BUSY; |
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} |
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spin_lock_irqsave(&priv->lock, flags); |
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bd = (struct bcom_fec_bd *) |
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bcom_prepare_next_buffer(priv->tx_dmatsk); |
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bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC; |
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bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len, |
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DMA_TO_DEVICE); |
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skb_tx_timestamp(skb); |
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bcom_submit_next_buffer(priv->tx_dmatsk, skb); |
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spin_unlock_irqrestore(&priv->lock, flags); |
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|
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if (bcom_queue_full(priv->tx_dmatsk)) { |
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netif_stop_queue(dev); |
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} |
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return NETDEV_TX_OK; |
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} |
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#ifdef CONFIG_NET_POLL_CONTROLLER |
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static void mpc52xx_fec_poll_controller(struct net_device *dev) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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|
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disable_irq(priv->t_irq); |
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mpc52xx_fec_tx_interrupt(priv->t_irq, dev); |
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enable_irq(priv->t_irq); |
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disable_irq(priv->r_irq); |
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mpc52xx_fec_rx_interrupt(priv->r_irq, dev); |
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enable_irq(priv->r_irq); |
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} |
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#endif |
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|
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/* This handles BestComm transmit task interrupts |
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*/ |
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static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id) |
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{ |
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struct net_device *dev = dev_id; |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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|
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spin_lock(&priv->lock); |
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while (bcom_buffer_done(priv->tx_dmatsk)) { |
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struct sk_buff *skb; |
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struct bcom_fec_bd *bd; |
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skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL, |
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(struct bcom_bd **)&bd); |
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dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len, |
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DMA_TO_DEVICE); |
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|
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dev_consume_skb_irq(skb); |
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} |
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spin_unlock(&priv->lock); |
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netif_wake_queue(dev); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id) |
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{ |
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struct net_device *dev = dev_id; |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct sk_buff *rskb; /* received sk_buff */ |
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struct sk_buff *skb; /* new sk_buff to enqueue in its place */ |
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struct bcom_fec_bd *bd; |
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u32 status, physaddr; |
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int length; |
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spin_lock(&priv->lock); |
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|
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while (bcom_buffer_done(priv->rx_dmatsk)) { |
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|
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rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status, |
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(struct bcom_bd **)&bd); |
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physaddr = bd->skb_pa; |
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|
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/* Test for errors in received frame */ |
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if (status & BCOM_FEC_RX_BD_ERRORS) { |
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/* Drop packet and reuse the buffer */ |
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mpc52xx_fec_rx_submit(dev, rskb); |
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dev->stats.rx_dropped++; |
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continue; |
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} |
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|
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/* skbs are allocated on open, so now we allocate a new one, |
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* and remove the old (with the packet) */ |
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skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE); |
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if (!skb) { |
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/* Can't get a new one : reuse the same & drop pkt */ |
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dev_notice(&dev->dev, "Low memory - dropped packet.\n"); |
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mpc52xx_fec_rx_submit(dev, rskb); |
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dev->stats.rx_dropped++; |
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continue; |
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} |
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|
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/* Enqueue the new sk_buff back on the hardware */ |
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mpc52xx_fec_rx_submit(dev, skb); |
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|
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/* Process the received skb - Drop the spin lock while |
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* calling into the network stack */ |
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spin_unlock(&priv->lock); |
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|
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dma_unmap_single(dev->dev.parent, physaddr, rskb->len, |
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DMA_FROM_DEVICE); |
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length = status & BCOM_FEC_RX_BD_LEN_MASK; |
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skb_put(rskb, length - 4); /* length without CRC32 */ |
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rskb->protocol = eth_type_trans(rskb, dev); |
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if (!skb_defer_rx_timestamp(rskb)) |
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netif_rx(rskb); |
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|
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spin_lock(&priv->lock); |
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} |
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|
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spin_unlock(&priv->lock); |
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|
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return IRQ_HANDLED; |
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} |
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|
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static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id) |
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{ |
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struct net_device *dev = dev_id; |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct mpc52xx_fec __iomem *fec = priv->fec; |
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u32 ievent; |
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|
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ievent = in_be32(&fec->ievent); |
|
|
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ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */ |
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if (!ievent) |
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return IRQ_NONE; |
|
|
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out_be32(&fec->ievent, ievent); /* clear pending events */ |
|
|
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/* on fifo error, soft-reset fec */ |
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if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { |
|
|
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if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR)) |
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dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n"); |
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if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR)) |
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dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n"); |
|
|
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spin_lock(&priv->lock); |
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mpc52xx_fec_reset(dev); |
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spin_unlock(&priv->lock); |
|
|
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return IRQ_HANDLED; |
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} |
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|
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if (ievent & ~FEC_IEVENT_TFINT) |
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dev_dbg(&dev->dev, "ievent: %08x\n", ievent); |
|
|
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return IRQ_HANDLED; |
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} |
|
|
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/* |
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* Get the current statistics. |
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* This may be called with the card open or closed. |
|
*/ |
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static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev) |
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{ |
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struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
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struct net_device_stats *stats = &dev->stats; |
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struct mpc52xx_fec __iomem *fec = priv->fec; |
|
|
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stats->rx_bytes = in_be32(&fec->rmon_r_octets); |
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stats->rx_packets = in_be32(&fec->rmon_r_packets); |
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stats->rx_errors = in_be32(&fec->rmon_r_crc_align) + |
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in_be32(&fec->rmon_r_undersize) + |
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in_be32(&fec->rmon_r_oversize) + |
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in_be32(&fec->rmon_r_frag) + |
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in_be32(&fec->rmon_r_jab); |
|
|
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stats->tx_bytes = in_be32(&fec->rmon_t_octets); |
|
stats->tx_packets = in_be32(&fec->rmon_t_packets); |
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stats->tx_errors = in_be32(&fec->rmon_t_crc_align) + |
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in_be32(&fec->rmon_t_undersize) + |
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in_be32(&fec->rmon_t_oversize) + |
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in_be32(&fec->rmon_t_frag) + |
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in_be32(&fec->rmon_t_jab); |
|
|
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stats->multicast = in_be32(&fec->rmon_r_mc_pkt); |
|
stats->collisions = in_be32(&fec->rmon_t_col); |
|
|
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/* detailed rx_errors: */ |
|
stats->rx_length_errors = in_be32(&fec->rmon_r_undersize) |
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+ in_be32(&fec->rmon_r_oversize) |
|
+ in_be32(&fec->rmon_r_frag) |
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+ in_be32(&fec->rmon_r_jab); |
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stats->rx_over_errors = in_be32(&fec->r_macerr); |
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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); |
|
|
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/* 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; |
|
struct netdev_hw_addr *ha; |
|
u32 gaddr1 = 0x00000000; |
|
u32 gaddr2 = 0x00000000; |
|
|
|
netdev_for_each_mc_addr(ha, dev) { |
|
crc = ether_crc_le(6, ha->addr) >> 26; |
|
if (crc >= 32) |
|
gaddr1 |= 1 << (crc-32); |
|
else |
|
gaddr2 |= 1 << crc; |
|
} |
|
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) */ |
|
out_be32(&fec->mii_speed, priv->mdio_speed); |
|
} |
|
|
|
/** |
|
* 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->seven_wire_mode) |
|
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, bool may_sleep) |
|
{ |
|
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 (may_sleep) { |
|
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); |
|
} |
|
|
|
/* 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, false); |
|
|
|
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); |
|
|
|
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); |
|
|
|
netif_wake_queue(dev); |
|
} |
|
|
|
|
|
/* ethtool interface */ |
|
|
|
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_link = ethtool_op_get_link, |
|
.get_msglevel = mpc52xx_fec_get_msglevel, |
|
.set_msglevel = mpc52xx_fec_set_msglevel, |
|
.get_ts_info = ethtool_op_get_ts_info, |
|
.get_link_ksettings = phy_ethtool_get_link_ksettings, |
|
.set_link_ksettings = phy_ethtool_set_link_ksettings, |
|
}; |
|
|
|
|
|
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_rx_mode = mpc52xx_fec_set_multicast_list, |
|
.ndo_set_mac_address = mpc52xx_fec_set_mac_address, |
|
.ndo_validate_addr = eth_validate_addr, |
|
.ndo_eth_ioctl = phy_do_ioctl, |
|
.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 mpc52xx_fec_probe(struct platform_device *op) |
|
{ |
|
int rv; |
|
struct net_device *ndev; |
|
struct mpc52xx_fec_priv *priv = NULL; |
|
struct resource mem; |
|
const u32 *prop; |
|
int prop_size; |
|
struct device_node *np = op->dev.of_node; |
|
|
|
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); |
|
priv->ndev = ndev; |
|
|
|
/* Reserve FEC control zone */ |
|
rv = of_address_to_resource(np, 0, &mem); |
|
if (rv) { |
|
pr_err("Error while parsing device node resource\n"); |
|
goto err_netdev; |
|
} |
|
if (resource_size(&mem) < sizeof(struct mpc52xx_fec)) { |
|
pr_err("invalid resource size (%lx < %x), check mpc52xx_devices.c\n", |
|
(unsigned long)resource_size(&mem), |
|
sizeof(struct mpc52xx_fec)); |
|
rv = -EINVAL; |
|
goto err_netdev; |
|
} |
|
|
|
if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), |
|
DRIVER_NAME)) { |
|
rv = -EBUSY; |
|
goto err_netdev; |
|
} |
|
|
|
/* 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; |
|
SET_NETDEV_DEV(ndev, &op->dev); |
|
|
|
spin_lock_init(&priv->lock); |
|
|
|
/* ioremap the zones */ |
|
priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec)); |
|
|
|
if (!priv->fec) { |
|
rv = -ENOMEM; |
|
goto err_mem_region; |
|
} |
|
|
|
/* 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) { |
|
pr_err("Can not init SDMA tasks\n"); |
|
rv = -ENOMEM; |
|
goto err_rx_tx_dmatsk; |
|
} |
|
|
|
/* Get the IRQ we need one by one */ |
|
/* Control */ |
|
ndev->irq = irq_of_parse_and_map(np, 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: |
|
* |
|
* First try to read MAC address from DT |
|
*/ |
|
rv = of_get_mac_address(np, ndev->dev_addr); |
|
if (rv) { |
|
struct mpc52xx_fec __iomem *fec = priv->fec; |
|
|
|
/* |
|
* If the MAC addresse is not provided via DT then read |
|
* it back from the controller regs |
|
*/ |
|
*(u32 *)(&ndev->dev_addr[0]) = in_be32(&fec->paddr1); |
|
*(u16 *)(&ndev->dev_addr[4]) = in_be32(&fec->paddr2) >> 16; |
|
} |
|
|
|
/* |
|
* Check if the MAC address is valid, if not get a random one |
|
*/ |
|
if (!is_valid_ether_addr(ndev->dev_addr)) { |
|
eth_hw_addr_random(ndev); |
|
dev_warn(&ndev->dev, "using random MAC address %pM\n", |
|
ndev->dev_addr); |
|
} |
|
|
|
priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT); |
|
|
|
/* |
|
* Link mode configuration |
|
*/ |
|
|
|
/* Start with safe defaults for link connection */ |
|
priv->speed = 100; |
|
priv->duplex = DUPLEX_HALF; |
|
priv->mdio_speed = ((mpc5xxx_get_bus_frequency(np) >> 20) / 5) << 1; |
|
|
|
/* The current speed preconfigures the speed of the MII link */ |
|
prop = of_get_property(np, "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, then get the PHY node */ |
|
priv->phy_node = of_parse_phandle(np, "phy-handle", 0); |
|
|
|
/* the 7-wire property means don't use MII mode */ |
|
if (of_find_property(np, "fsl,7-wire-mode", NULL)) { |
|
priv->seven_wire_mode = 1; |
|
dev_info(&ndev->dev, "using 7-wire PHY mode\n"); |
|
} |
|
|
|
/* Hardware init */ |
|
mpc52xx_fec_hw_init(ndev); |
|
mpc52xx_fec_reset_stats(ndev); |
|
|
|
rv = register_netdev(ndev); |
|
if (rv < 0) |
|
goto err_node; |
|
|
|
/* We're done ! */ |
|
platform_set_drvdata(op, ndev); |
|
netdev_info(ndev, "%pOF MAC %pM\n", |
|
op->dev.of_node, ndev->dev_addr); |
|
|
|
return 0; |
|
|
|
err_node: |
|
of_node_put(priv->phy_node); |
|
irq_dispose_mapping(ndev->irq); |
|
err_rx_tx_dmatsk: |
|
if (priv->rx_dmatsk) |
|
bcom_fec_rx_release(priv->rx_dmatsk); |
|
if (priv->tx_dmatsk) |
|
bcom_fec_tx_release(priv->tx_dmatsk); |
|
iounmap(priv->fec); |
|
err_mem_region: |
|
release_mem_region(mem.start, sizeof(struct mpc52xx_fec)); |
|
err_netdev: |
|
free_netdev(ndev); |
|
|
|
return rv; |
|
} |
|
|
|
static int |
|
mpc52xx_fec_remove(struct platform_device *op) |
|
{ |
|
struct net_device *ndev; |
|
struct mpc52xx_fec_priv *priv; |
|
|
|
ndev = platform_get_drvdata(op); |
|
priv = netdev_priv(ndev); |
|
|
|
unregister_netdev(ndev); |
|
|
|
of_node_put(priv->phy_node); |
|
priv->phy_node = NULL; |
|
|
|
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); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state) |
|
{ |
|
struct net_device *dev = platform_get_drvdata(op); |
|
|
|
if (netif_running(dev)) |
|
mpc52xx_fec_close(dev); |
|
|
|
return 0; |
|
} |
|
|
|
static int mpc52xx_fec_of_resume(struct platform_device *op) |
|
{ |
|
struct net_device *dev = platform_get_drvdata(op); |
|
|
|
mpc52xx_fec_hw_init(dev); |
|
mpc52xx_fec_reset_stats(dev); |
|
|
|
if (netif_running(dev)) |
|
mpc52xx_fec_open(dev); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static const 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 platform_driver mpc52xx_fec_driver = { |
|
.driver = { |
|
.name = DRIVER_NAME, |
|
.of_match_table = mpc52xx_fec_match, |
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}, |
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.probe = mpc52xx_fec_probe, |
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.remove = mpc52xx_fec_remove, |
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#ifdef CONFIG_PM |
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.suspend = mpc52xx_fec_of_suspend, |
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.resume = mpc52xx_fec_of_resume, |
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#endif |
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}; |
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|
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|
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/* ======================================================================== */ |
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/* Module */ |
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/* ======================================================================== */ |
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|
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static struct platform_driver * const drivers[] = { |
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#ifdef CONFIG_FEC_MPC52xx_MDIO |
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&mpc52xx_fec_mdio_driver, |
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#endif |
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&mpc52xx_fec_driver, |
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}; |
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|
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static int __init |
|
mpc52xx_fec_init(void) |
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{ |
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return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
|
} |
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|
|
static void __exit |
|
mpc52xx_fec_exit(void) |
|
{ |
|
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
|
} |
|
|
|
|
|
module_init(mpc52xx_fec_init); |
|
module_exit(mpc52xx_fec_exit); |
|
|
|
MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Dale Farnsworth"); |
|
MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
|
|
|