mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:36:42 +07:00
9d1e5e40d6
commit 1e4e0767ec
(Fix locking on fec_mpc52xx driver) assumed IRQ are
enabled when an IRQ handler is called.
It is not the case anymore (IRQF_DISABLED is deprecated), so we can use
regular spin_lock(), no need for spin_lock_irqsave().
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Jean-Michel Hautbois <jhautbois@gmail.com>
Cc: Asier Llano <a.llano@ziv.es>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
1101 lines
28 KiB
C
1101 lines
28 KiB
C
/*
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* Driver for the MPC5200 Fast Ethernet Controller
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*
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* Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
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* now maintained by Sylvain Munaut <tnt@246tNt.com>
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*
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* Copyright (C) 2007 Domen Puncer, Telargo, Inc.
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* Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
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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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#include <linux/module.h>
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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/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_platform.h>
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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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#include <asm/io.h>
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#include <asm/delay.h>
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#include <asm/mpc52xx.h>
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#include <sysdev/bestcomm/bestcomm.h>
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#include <sysdev/bestcomm/fec.h>
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#include "fec_mpc52xx.h"
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#define DRIVER_NAME "mpc52xx-fec"
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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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/* MDIO link details */
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unsigned int mdio_speed;
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struct device_node *phy_node;
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struct phy_device *phydev;
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enum phy_state link;
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int seven_wire_mode;
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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);
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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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static u8 mpc52xx_fec_mac_addr[6];
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module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
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MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
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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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static void mpc52xx_fec_tx_timeout(struct net_device *dev)
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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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dev_warn(&dev->dev, "transmit timed out\n");
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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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netif_wake_queue(dev);
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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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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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static void mpc52xx_fec_get_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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*(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
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*(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
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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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memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
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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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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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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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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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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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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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while (!bcom_queue_full(rxtsk)) {
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skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
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if (!skb)
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return -EAGAIN;
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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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/* 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 = priv->phydev;
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int new_state = 0;
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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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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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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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out_be32(&fec->r_cntrl, rcntrl);
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out_be32(&fec->x_cntrl, tcntrl);
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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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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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int err = -EBUSY;
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if (priv->phy_node) {
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priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
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mpc52xx_fec_adjust_link, 0, 0);
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if (!priv->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(priv->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 (priv->phydev) {
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phy_stop(priv->phydev);
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phy_disconnect(priv->phydev);
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priv->phydev = NULL;
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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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netif_stop_queue(dev);
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mpc52xx_fec_stop(dev);
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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 (priv->phydev) {
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/* power down phy */
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phy_stop(priv->phydev);
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phy_disconnect(priv->phydev);
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priv->phydev = NULL;
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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 int 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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bcom_submit_next_buffer(priv->tx_dmatsk, skb);
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spin_unlock_irqrestore(&priv->lock, flags);
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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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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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/* 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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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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dev_kfree_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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while (bcom_buffer_done(priv->rx_dmatsk)) {
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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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/* 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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/* 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 = dev_alloc_skb(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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/* Enqueue the new sk_buff back on the hardware */
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mpc52xx_fec_rx_submit(dev, skb);
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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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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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netif_rx(rskb);
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spin_lock(&priv->lock);
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}
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spin_unlock(&priv->lock);
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return IRQ_HANDLED;
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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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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))
|
|
dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
|
|
|
|
spin_lock(&priv->lock);
|
|
mpc52xx_fec_reset(dev);
|
|
spin_unlock(&priv->lock);
|
|
|
|
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;
|
|
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)
|
|
{
|
|
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);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
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 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_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, 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 platform_device *op, const struct of_device_id *match)
|
|
{
|
|
int rv;
|
|
struct net_device *ndev;
|
|
struct mpc52xx_fec_priv *priv = NULL;
|
|
struct resource mem;
|
|
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);
|
|
priv->ndev = ndev;
|
|
|
|
/* Reserve FEC control zone */
|
|
rv = of_address_to_resource(op->dev.of_node, 0, &mem);
|
|
if (rv) {
|
|
printk(KERN_ERR DRIVER_NAME ": "
|
|
"Error while parsing device node resource\n" );
|
|
goto err_netdev;
|
|
}
|
|
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));
|
|
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) {
|
|
printk(KERN_ERR DRIVER_NAME ": 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(op->dev.of_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->speed = 100;
|
|
priv->duplex = DUPLEX_HALF;
|
|
priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->dev.of_node) >> 20) / 5) << 1;
|
|
|
|
/* The current speed preconfigures the speed of the MII link */
|
|
prop = of_get_property(op->dev.of_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, then get the PHY node */
|
|
priv->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0);
|
|
|
|
/* the 7-wire property means don't use MII mode */
|
|
if (of_find_property(op->dev.of_node, "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 ! */
|
|
dev_set_drvdata(&op->dev, ndev);
|
|
|
|
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 = dev_get_drvdata(&op->dev);
|
|
priv = netdev_priv(ndev);
|
|
|
|
unregister_netdev(ndev);
|
|
|
|
if (priv->phy_node)
|
|
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);
|
|
|
|
dev_set_drvdata(&op->dev, NULL);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int mpc52xx_fec_of_suspend(struct platform_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 platform_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 = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.owner = THIS_MODULE,
|
|
.of_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");
|