diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c | 1128 |
1 files changed, 1128 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c new file mode 100644 index 000000000..8844a9a04 --- /dev/null +++ b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c @@ -0,0 +1,1128 @@ +/* + * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. + * + * Copyright (c) 2003 Intracom S.A. + * by Pantelis Antoniou <panto@intracom.gr> + * + * 2005 (c) MontaVista Software, Inc. + * Vitaly Bordug <vbordug@ru.mvista.com> + * + * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com> + * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/spinlock.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/bitops.h> +#include <linux/fs.h> +#include <linux/platform_device.h> +#include <linux/phy.h> +#include <linux/of.h> +#include <linux/of_mdio.h> +#include <linux/of_platform.h> +#include <linux/of_gpio.h> +#include <linux/of_net.h> +#include <linux/pgtable.h> + +#include <linux/vmalloc.h> +#include <asm/irq.h> +#include <linux/uaccess.h> + +#include "fs_enet.h" + +/*************************************************/ + +MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>"); +MODULE_DESCRIPTION("Freescale Ethernet Driver"); +MODULE_LICENSE("GPL"); + +static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */ +module_param(fs_enet_debug, int, 0); +MODULE_PARM_DESC(fs_enet_debug, + "Freescale bitmapped debugging message enable value"); + +#define RX_RING_SIZE 32 +#define TX_RING_SIZE 64 + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void fs_enet_netpoll(struct net_device *dev); +#endif + +static void fs_set_multicast_list(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + + (*fep->ops->set_multicast_list)(dev); +} + +static void skb_align(struct sk_buff *skb, int align) +{ + int off = ((unsigned long)skb->data) & (align - 1); + + if (off) + skb_reserve(skb, align - off); +} + +/* NAPI function */ +static int fs_enet_napi(struct napi_struct *napi, int budget) +{ + struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi); + struct net_device *dev = fep->ndev; + const struct fs_platform_info *fpi = fep->fpi; + cbd_t __iomem *bdp; + struct sk_buff *skb, *skbn; + int received = 0; + u16 pkt_len, sc; + int curidx; + int dirtyidx, do_wake, do_restart; + int tx_left = TX_RING_SIZE; + + spin_lock(&fep->tx_lock); + bdp = fep->dirty_tx; + + /* clear status bits for napi*/ + (*fep->ops->napi_clear_event)(dev); + + do_wake = do_restart = 0; + while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0 && tx_left) { + dirtyidx = bdp - fep->tx_bd_base; + + if (fep->tx_free == fep->tx_ring) + break; + + skb = fep->tx_skbuff[dirtyidx]; + + /* + * Check for errors. + */ + if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC | + BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) { + + if (sc & BD_ENET_TX_HB) /* No heartbeat */ + dev->stats.tx_heartbeat_errors++; + if (sc & BD_ENET_TX_LC) /* Late collision */ + dev->stats.tx_window_errors++; + if (sc & BD_ENET_TX_RL) /* Retrans limit */ + dev->stats.tx_aborted_errors++; + if (sc & BD_ENET_TX_UN) /* Underrun */ + dev->stats.tx_fifo_errors++; + if (sc & BD_ENET_TX_CSL) /* Carrier lost */ + dev->stats.tx_carrier_errors++; + + if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) { + dev->stats.tx_errors++; + do_restart = 1; + } + } else + dev->stats.tx_packets++; + + if (sc & BD_ENET_TX_READY) { + dev_warn(fep->dev, + "HEY! Enet xmit interrupt and TX_READY.\n"); + } + + /* + * Deferred means some collisions occurred during transmit, + * but we eventually sent the packet OK. + */ + if (sc & BD_ENET_TX_DEF) + dev->stats.collisions++; + + /* unmap */ + if (fep->mapped_as_page[dirtyidx]) + dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp), + CBDR_DATLEN(bdp), DMA_TO_DEVICE); + else + dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), + CBDR_DATLEN(bdp), DMA_TO_DEVICE); + + /* + * Free the sk buffer associated with this last transmit. + */ + if (skb) { + dev_kfree_skb(skb); + fep->tx_skbuff[dirtyidx] = NULL; + } + + /* + * Update pointer to next buffer descriptor to be transmitted. + */ + if ((sc & BD_ENET_TX_WRAP) == 0) + bdp++; + else + bdp = fep->tx_bd_base; + + /* + * Since we have freed up a buffer, the ring is no longer + * full. + */ + if (++fep->tx_free == MAX_SKB_FRAGS) + do_wake = 1; + tx_left--; + } + + fep->dirty_tx = bdp; + + if (do_restart) + (*fep->ops->tx_restart)(dev); + + spin_unlock(&fep->tx_lock); + + if (do_wake) + netif_wake_queue(dev); + + /* + * First, grab all of the stats for the incoming packet. + * These get messed up if we get called due to a busy condition. + */ + bdp = fep->cur_rx; + + while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0 && + received < budget) { + curidx = bdp - fep->rx_bd_base; + + /* + * Since we have allocated space to hold a complete frame, + * the last indicator should be set. + */ + if ((sc & BD_ENET_RX_LAST) == 0) + dev_warn(fep->dev, "rcv is not +last\n"); + + /* + * Check for errors. + */ + if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL | + BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) { + dev->stats.rx_errors++; + /* Frame too long or too short. */ + if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) + dev->stats.rx_length_errors++; + /* Frame alignment */ + if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL)) + dev->stats.rx_frame_errors++; + /* CRC Error */ + if (sc & BD_ENET_RX_CR) + dev->stats.rx_crc_errors++; + /* FIFO overrun */ + if (sc & BD_ENET_RX_OV) + dev->stats.rx_crc_errors++; + + skbn = fep->rx_skbuff[curidx]; + } else { + skb = fep->rx_skbuff[curidx]; + + /* + * Process the incoming frame. + */ + dev->stats.rx_packets++; + pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */ + dev->stats.rx_bytes += pkt_len + 4; + + if (pkt_len <= fpi->rx_copybreak) { + /* +2 to make IP header L1 cache aligned */ + skbn = netdev_alloc_skb(dev, pkt_len + 2); + if (skbn != NULL) { + skb_reserve(skbn, 2); /* align IP header */ + skb_copy_from_linear_data(skb, + skbn->data, pkt_len); + swap(skb, skbn); + dma_sync_single_for_cpu(fep->dev, + CBDR_BUFADDR(bdp), + L1_CACHE_ALIGN(pkt_len), + DMA_FROM_DEVICE); + } + } else { + skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE); + + if (skbn) { + dma_addr_t dma; + + skb_align(skbn, ENET_RX_ALIGN); + + dma_unmap_single(fep->dev, + CBDR_BUFADDR(bdp), + L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), + DMA_FROM_DEVICE); + + dma = dma_map_single(fep->dev, + skbn->data, + L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), + DMA_FROM_DEVICE); + CBDW_BUFADDR(bdp, dma); + } + } + + if (skbn != NULL) { + skb_put(skb, pkt_len); /* Make room */ + skb->protocol = eth_type_trans(skb, dev); + received++; + netif_receive_skb(skb); + } else { + dev->stats.rx_dropped++; + skbn = skb; + } + } + + fep->rx_skbuff[curidx] = skbn; + CBDW_DATLEN(bdp, 0); + CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY); + + /* + * Update BD pointer to next entry. + */ + if ((sc & BD_ENET_RX_WRAP) == 0) + bdp++; + else + bdp = fep->rx_bd_base; + + (*fep->ops->rx_bd_done)(dev); + } + + fep->cur_rx = bdp; + + if (received < budget && tx_left) { + /* done */ + napi_complete_done(napi, received); + (*fep->ops->napi_enable)(dev); + + return received; + } + + return budget; +} + +/* + * The interrupt handler. + * This is called from the MPC core interrupt. + */ +static irqreturn_t +fs_enet_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct fs_enet_private *fep; + const struct fs_platform_info *fpi; + u32 int_events; + u32 int_clr_events; + int nr, napi_ok; + int handled; + + fep = netdev_priv(dev); + fpi = fep->fpi; + + nr = 0; + while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) { + nr++; + + int_clr_events = int_events; + int_clr_events &= ~fep->ev_napi; + + (*fep->ops->clear_int_events)(dev, int_clr_events); + + if (int_events & fep->ev_err) + (*fep->ops->ev_error)(dev, int_events); + + if (int_events & fep->ev) { + napi_ok = napi_schedule_prep(&fep->napi); + + (*fep->ops->napi_disable)(dev); + (*fep->ops->clear_int_events)(dev, fep->ev_napi); + + /* NOTE: it is possible for FCCs in NAPI mode */ + /* to submit a spurious interrupt while in poll */ + if (napi_ok) + __napi_schedule(&fep->napi); + } + + } + + handled = nr > 0; + return IRQ_RETVAL(handled); +} + +void fs_init_bds(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + cbd_t __iomem *bdp; + struct sk_buff *skb; + int i; + + fs_cleanup_bds(dev); + + fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; + fep->tx_free = fep->tx_ring; + fep->cur_rx = fep->rx_bd_base; + + /* + * Initialize the receive buffer descriptors. + */ + for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { + skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE); + if (skb == NULL) + break; + + skb_align(skb, ENET_RX_ALIGN); + fep->rx_skbuff[i] = skb; + CBDW_BUFADDR(bdp, + dma_map_single(fep->dev, skb->data, + L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), + DMA_FROM_DEVICE)); + CBDW_DATLEN(bdp, 0); /* zero */ + CBDW_SC(bdp, BD_ENET_RX_EMPTY | + ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP)); + } + /* + * if we failed, fillup remainder + */ + for (; i < fep->rx_ring; i++, bdp++) { + fep->rx_skbuff[i] = NULL; + CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP); + } + + /* + * ...and the same for transmit. + */ + for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { + fep->tx_skbuff[i] = NULL; + CBDW_BUFADDR(bdp, 0); + CBDW_DATLEN(bdp, 0); + CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP); + } +} + +void fs_cleanup_bds(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + struct sk_buff *skb; + cbd_t __iomem *bdp; + int i; + + /* + * Reset SKB transmit buffers. + */ + for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { + if ((skb = fep->tx_skbuff[i]) == NULL) + continue; + + /* unmap */ + dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), + skb->len, DMA_TO_DEVICE); + + fep->tx_skbuff[i] = NULL; + dev_kfree_skb(skb); + } + + /* + * Reset SKB receive buffers + */ + for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { + if ((skb = fep->rx_skbuff[i]) == NULL) + continue; + + /* unmap */ + dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), + L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), + DMA_FROM_DEVICE); + + fep->rx_skbuff[i] = NULL; + + dev_kfree_skb(skb); + } +} + +/**********************************************************************************/ + +#ifdef CONFIG_FS_ENET_MPC5121_FEC +/* + * MPC5121 FEC requeries 4-byte alignment for TX data buffer! + */ +static struct sk_buff *tx_skb_align_workaround(struct net_device *dev, + struct sk_buff *skb) +{ + struct sk_buff *new_skb; + + if (skb_linearize(skb)) + return NULL; + + /* Alloc new skb */ + new_skb = netdev_alloc_skb(dev, skb->len + 4); + if (!new_skb) + return NULL; + + /* Make sure new skb is properly aligned */ + skb_align(new_skb, 4); + + /* Copy data to new skb ... */ + skb_copy_from_linear_data(skb, new_skb->data, skb->len); + skb_put(new_skb, skb->len); + + /* ... and free an old one */ + dev_kfree_skb_any(skb); + + return new_skb; +} +#endif + +static netdev_tx_t +fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + cbd_t __iomem *bdp; + int curidx; + u16 sc; + int nr_frags; + skb_frag_t *frag; + int len; +#ifdef CONFIG_FS_ENET_MPC5121_FEC + int is_aligned = 1; + int i; + + if (!IS_ALIGNED((unsigned long)skb->data, 4)) { + is_aligned = 0; + } else { + nr_frags = skb_shinfo(skb)->nr_frags; + frag = skb_shinfo(skb)->frags; + for (i = 0; i < nr_frags; i++, frag++) { + if (!IS_ALIGNED(skb_frag_off(frag), 4)) { + is_aligned = 0; + break; + } + } + } + + if (!is_aligned) { + skb = tx_skb_align_workaround(dev, skb); + if (!skb) { + /* + * We have lost packet due to memory allocation error + * in tx_skb_align_workaround(). Hopefully original + * skb is still valid, so try transmit it later. + */ + return NETDEV_TX_BUSY; + } + } +#endif + + spin_lock(&fep->tx_lock); + + /* + * Fill in a Tx ring entry + */ + bdp = fep->cur_tx; + + nr_frags = skb_shinfo(skb)->nr_frags; + if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) { + netif_stop_queue(dev); + spin_unlock(&fep->tx_lock); + + /* + * Ooops. All transmit buffers are full. Bail out. + * This should not happen, since the tx queue should be stopped. + */ + dev_warn(fep->dev, "tx queue full!.\n"); + return NETDEV_TX_BUSY; + } + + curidx = bdp - fep->tx_bd_base; + + len = skb->len; + dev->stats.tx_bytes += len; + if (nr_frags) + len -= skb->data_len; + fep->tx_free -= nr_frags + 1; + /* + * Push the data cache so the CPM does not get stale memory data. + */ + CBDW_BUFADDR(bdp, dma_map_single(fep->dev, + skb->data, len, DMA_TO_DEVICE)); + CBDW_DATLEN(bdp, len); + + fep->mapped_as_page[curidx] = 0; + frag = skb_shinfo(skb)->frags; + while (nr_frags) { + CBDC_SC(bdp, + BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST | + BD_ENET_TX_TC); + CBDS_SC(bdp, BD_ENET_TX_READY); + + if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) { + bdp++; + curidx++; + } else { + bdp = fep->tx_bd_base; + curidx = 0; + } + + len = skb_frag_size(frag); + CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len, + DMA_TO_DEVICE)); + CBDW_DATLEN(bdp, len); + + fep->tx_skbuff[curidx] = NULL; + fep->mapped_as_page[curidx] = 1; + + frag++; + nr_frags--; + } + + /* Trigger transmission start */ + sc = BD_ENET_TX_READY | BD_ENET_TX_INTR | + BD_ENET_TX_LAST | BD_ENET_TX_TC; + + /* note that while FEC does not have this bit + * it marks it as available for software use + * yay for hw reuse :) */ + if (skb->len <= 60) + sc |= BD_ENET_TX_PAD; + CBDC_SC(bdp, BD_ENET_TX_STATS); + CBDS_SC(bdp, sc); + + /* Save skb pointer. */ + fep->tx_skbuff[curidx] = skb; + + /* If this was the last BD in the ring, start at the beginning again. */ + if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) + bdp++; + else + bdp = fep->tx_bd_base; + fep->cur_tx = bdp; + + if (fep->tx_free < MAX_SKB_FRAGS) + netif_stop_queue(dev); + + skb_tx_timestamp(skb); + + (*fep->ops->tx_kickstart)(dev); + + spin_unlock(&fep->tx_lock); + + return NETDEV_TX_OK; +} + +static void fs_timeout_work(struct work_struct *work) +{ + struct fs_enet_private *fep = container_of(work, struct fs_enet_private, + timeout_work); + struct net_device *dev = fep->ndev; + unsigned long flags; + int wake = 0; + + dev->stats.tx_errors++; + + spin_lock_irqsave(&fep->lock, flags); + + if (dev->flags & IFF_UP) { + phy_stop(dev->phydev); + (*fep->ops->stop)(dev); + (*fep->ops->restart)(dev); + } + + phy_start(dev->phydev); + wake = fep->tx_free >= MAX_SKB_FRAGS && + !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY); + spin_unlock_irqrestore(&fep->lock, flags); + + if (wake) + netif_wake_queue(dev); +} + +static void fs_timeout(struct net_device *dev, unsigned int txqueue) +{ + struct fs_enet_private *fep = netdev_priv(dev); + + schedule_work(&fep->timeout_work); +} + +/*----------------------------------------------------------------------------- + * generic link-change handler - should be sufficient for most cases + *-----------------------------------------------------------------------------*/ +static void generic_adjust_link(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + struct phy_device *phydev = dev->phydev; + int new_state = 0; + + if (phydev->link) { + /* adjust to duplex mode */ + if (phydev->duplex != fep->oldduplex) { + new_state = 1; + fep->oldduplex = phydev->duplex; + } + + if (phydev->speed != fep->oldspeed) { + new_state = 1; + fep->oldspeed = phydev->speed; + } + + if (!fep->oldlink) { + new_state = 1; + fep->oldlink = 1; + } + + if (new_state) + fep->ops->restart(dev); + } else if (fep->oldlink) { + new_state = 1; + fep->oldlink = 0; + fep->oldspeed = 0; + fep->oldduplex = -1; + } + + if (new_state && netif_msg_link(fep)) + phy_print_status(phydev); +} + + +static void fs_adjust_link(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&fep->lock, flags); + + if(fep->ops->adjust_link) + fep->ops->adjust_link(dev); + else + generic_adjust_link(dev); + + spin_unlock_irqrestore(&fep->lock, flags); +} + +static int fs_init_phy(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + struct phy_device *phydev; + phy_interface_t iface; + + fep->oldlink = 0; + fep->oldspeed = 0; + fep->oldduplex = -1; + + iface = fep->fpi->use_rmii ? + PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII; + + phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0, + iface); + if (!phydev) { + dev_err(&dev->dev, "Could not attach to PHY\n"); + return -ENODEV; + } + + return 0; +} + +static int fs_enet_open(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + int r; + int err; + + /* to initialize the fep->cur_rx,... */ + /* not doing this, will cause a crash in fs_enet_napi */ + fs_init_bds(fep->ndev); + + napi_enable(&fep->napi); + + /* Install our interrupt handler. */ + r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED, + "fs_enet-mac", dev); + if (r != 0) { + dev_err(fep->dev, "Could not allocate FS_ENET IRQ!"); + napi_disable(&fep->napi); + return -EINVAL; + } + + err = fs_init_phy(dev); + if (err) { + free_irq(fep->interrupt, dev); + napi_disable(&fep->napi); + return err; + } + phy_start(dev->phydev); + + netif_start_queue(dev); + + return 0; +} + +static int fs_enet_close(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + unsigned long flags; + + netif_stop_queue(dev); + netif_carrier_off(dev); + napi_disable(&fep->napi); + cancel_work_sync(&fep->timeout_work); + phy_stop(dev->phydev); + + spin_lock_irqsave(&fep->lock, flags); + spin_lock(&fep->tx_lock); + (*fep->ops->stop)(dev); + spin_unlock(&fep->tx_lock); + spin_unlock_irqrestore(&fep->lock, flags); + + /* release any irqs */ + phy_disconnect(dev->phydev); + free_irq(fep->interrupt, dev); + + return 0; +} + +/*************************************************************************/ + +static void fs_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); +} + +static int fs_get_regs_len(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + + return (*fep->ops->get_regs_len)(dev); +} + +static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs, + void *p) +{ + struct fs_enet_private *fep = netdev_priv(dev); + unsigned long flags; + int r, len; + + len = regs->len; + + spin_lock_irqsave(&fep->lock, flags); + r = (*fep->ops->get_regs)(dev, p, &len); + spin_unlock_irqrestore(&fep->lock, flags); + + if (r == 0) + regs->version = 0; +} + +static u32 fs_get_msglevel(struct net_device *dev) +{ + struct fs_enet_private *fep = netdev_priv(dev); + return fep->msg_enable; +} + +static void fs_set_msglevel(struct net_device *dev, u32 value) +{ + struct fs_enet_private *fep = netdev_priv(dev); + fep->msg_enable = value; +} + +static int fs_get_tunable(struct net_device *dev, + const struct ethtool_tunable *tuna, void *data) +{ + struct fs_enet_private *fep = netdev_priv(dev); + struct fs_platform_info *fpi = fep->fpi; + int ret = 0; + + switch (tuna->id) { + case ETHTOOL_RX_COPYBREAK: + *(u32 *)data = fpi->rx_copybreak; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int fs_set_tunable(struct net_device *dev, + const struct ethtool_tunable *tuna, const void *data) +{ + struct fs_enet_private *fep = netdev_priv(dev); + struct fs_platform_info *fpi = fep->fpi; + int ret = 0; + + switch (tuna->id) { + case ETHTOOL_RX_COPYBREAK: + fpi->rx_copybreak = *(u32 *)data; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static const struct ethtool_ops fs_ethtool_ops = { + .get_drvinfo = fs_get_drvinfo, + .get_regs_len = fs_get_regs_len, + .nway_reset = phy_ethtool_nway_reset, + .get_link = ethtool_op_get_link, + .get_msglevel = fs_get_msglevel, + .set_msglevel = fs_set_msglevel, + .get_regs = fs_get_regs, + .get_ts_info = ethtool_op_get_ts_info, + .get_link_ksettings = phy_ethtool_get_link_ksettings, + .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_tunable = fs_get_tunable, + .set_tunable = fs_set_tunable, +}; + +/**************************************************************************************/ + +#ifdef CONFIG_FS_ENET_HAS_FEC +#define IS_FEC(match) ((match)->data == &fs_fec_ops) +#else +#define IS_FEC(match) 0 +#endif + +static const struct net_device_ops fs_enet_netdev_ops = { + .ndo_open = fs_enet_open, + .ndo_stop = fs_enet_close, + .ndo_start_xmit = fs_enet_start_xmit, + .ndo_tx_timeout = fs_timeout, + .ndo_set_rx_mode = fs_set_multicast_list, + .ndo_eth_ioctl = phy_do_ioctl_running, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = fs_enet_netpoll, +#endif +}; + +static const struct of_device_id fs_enet_match[]; +static int fs_enet_probe(struct platform_device *ofdev) +{ + const struct of_device_id *match; + struct net_device *ndev; + struct fs_enet_private *fep; + struct fs_platform_info *fpi; + const u32 *data; + struct clk *clk; + int err; + const char *phy_connection_type; + int privsize, len, ret = -ENODEV; + + match = of_match_device(fs_enet_match, &ofdev->dev); + if (!match) + return -EINVAL; + + fpi = kzalloc(sizeof(*fpi), GFP_KERNEL); + if (!fpi) + return -ENOMEM; + + if (!IS_FEC(match)) { + data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len); + if (!data || len != 4) + goto out_free_fpi; + + fpi->cp_command = *data; + } + + fpi->rx_ring = RX_RING_SIZE; + fpi->tx_ring = TX_RING_SIZE; + fpi->rx_copybreak = 240; + fpi->napi_weight = 17; + fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0); + if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) { + err = of_phy_register_fixed_link(ofdev->dev.of_node); + if (err) + goto out_free_fpi; + + /* In the case of a fixed PHY, the DT node associated + * to the PHY is the Ethernet MAC DT node. + */ + fpi->phy_node = of_node_get(ofdev->dev.of_node); + } + + if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) { + phy_connection_type = of_get_property(ofdev->dev.of_node, + "phy-connection-type", NULL); + if (phy_connection_type && !strcmp("rmii", phy_connection_type)) + fpi->use_rmii = 1; + } + + /* make clock lookup non-fatal (the driver is shared among platforms), + * but require enable to succeed when a clock was specified/found, + * keep a reference to the clock upon successful acquisition + */ + clk = devm_clk_get(&ofdev->dev, "per"); + if (!IS_ERR(clk)) { + ret = clk_prepare_enable(clk); + if (ret) + goto out_deregister_fixed_link; + + fpi->clk_per = clk; + } + + privsize = sizeof(*fep) + + sizeof(struct sk_buff **) * + (fpi->rx_ring + fpi->tx_ring) + + sizeof(char) * fpi->tx_ring; + + ndev = alloc_etherdev(privsize); + if (!ndev) { + ret = -ENOMEM; + goto out_put; + } + + SET_NETDEV_DEV(ndev, &ofdev->dev); + platform_set_drvdata(ofdev, ndev); + + fep = netdev_priv(ndev); + fep->dev = &ofdev->dev; + fep->ndev = ndev; + fep->fpi = fpi; + fep->ops = match->data; + + ret = fep->ops->setup_data(ndev); + if (ret) + goto out_free_dev; + + fep->rx_skbuff = (struct sk_buff **)&fep[1]; + fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring; + fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring + + fpi->tx_ring); + + spin_lock_init(&fep->lock); + spin_lock_init(&fep->tx_lock); + + of_get_ethdev_address(ofdev->dev.of_node, ndev); + + ret = fep->ops->allocate_bd(ndev); + if (ret) + goto out_cleanup_data; + + fep->rx_bd_base = fep->ring_base; + fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring; + + fep->tx_ring = fpi->tx_ring; + fep->rx_ring = fpi->rx_ring; + + ndev->netdev_ops = &fs_enet_netdev_ops; + ndev->watchdog_timeo = 2 * HZ; + INIT_WORK(&fep->timeout_work, fs_timeout_work); + netif_napi_add_weight(ndev, &fep->napi, fs_enet_napi, + fpi->napi_weight); + + ndev->ethtool_ops = &fs_ethtool_ops; + + netif_carrier_off(ndev); + + ndev->features |= NETIF_F_SG; + + ret = register_netdev(ndev); + if (ret) + goto out_free_bd; + + pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr); + + return 0; + +out_free_bd: + fep->ops->free_bd(ndev); +out_cleanup_data: + fep->ops->cleanup_data(ndev); +out_free_dev: + free_netdev(ndev); +out_put: + clk_disable_unprepare(fpi->clk_per); +out_deregister_fixed_link: + of_node_put(fpi->phy_node); + if (of_phy_is_fixed_link(ofdev->dev.of_node)) + of_phy_deregister_fixed_link(ofdev->dev.of_node); +out_free_fpi: + kfree(fpi); + return ret; +} + +static int fs_enet_remove(struct platform_device *ofdev) +{ + struct net_device *ndev = platform_get_drvdata(ofdev); + struct fs_enet_private *fep = netdev_priv(ndev); + + unregister_netdev(ndev); + + fep->ops->free_bd(ndev); + fep->ops->cleanup_data(ndev); + dev_set_drvdata(fep->dev, NULL); + of_node_put(fep->fpi->phy_node); + clk_disable_unprepare(fep->fpi->clk_per); + if (of_phy_is_fixed_link(ofdev->dev.of_node)) + of_phy_deregister_fixed_link(ofdev->dev.of_node); + free_netdev(ndev); + return 0; +} + +static const struct of_device_id fs_enet_match[] = { +#ifdef CONFIG_FS_ENET_HAS_SCC + { + .compatible = "fsl,cpm1-scc-enet", + .data = (void *)&fs_scc_ops, + }, + { + .compatible = "fsl,cpm2-scc-enet", + .data = (void *)&fs_scc_ops, + }, +#endif +#ifdef CONFIG_FS_ENET_HAS_FCC + { + .compatible = "fsl,cpm2-fcc-enet", + .data = (void *)&fs_fcc_ops, + }, +#endif +#ifdef CONFIG_FS_ENET_HAS_FEC +#ifdef CONFIG_FS_ENET_MPC5121_FEC + { + .compatible = "fsl,mpc5121-fec", + .data = (void *)&fs_fec_ops, + }, + { + .compatible = "fsl,mpc5125-fec", + .data = (void *)&fs_fec_ops, + }, +#else + { + .compatible = "fsl,pq1-fec-enet", + .data = (void *)&fs_fec_ops, + }, +#endif +#endif + {} +}; +MODULE_DEVICE_TABLE(of, fs_enet_match); + +static struct platform_driver fs_enet_driver = { + .driver = { + .name = "fs_enet", + .of_match_table = fs_enet_match, + }, + .probe = fs_enet_probe, + .remove = fs_enet_remove, +}; + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void fs_enet_netpoll(struct net_device *dev) +{ + disable_irq(dev->irq); + fs_enet_interrupt(dev->irq, dev); + enable_irq(dev->irq); +} +#endif + +module_platform_driver(fs_enet_driver); |