| /* |
| * Driver for the MPC5200 Fast Ethernet Controller |
| * |
| * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and |
| * now maintained by Sylvain Munaut <tnt@246tNt.com> |
| * |
| * Copyright (C) 2007 Domen Puncer, Telargo, Inc. |
| * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com> |
| * Copyright (C) 2003-2004 MontaVista, Software, Inc. |
| * |
| * This file is licensed under the terms of the GNU General Public License |
| * version 2. This program is licensed "as is" without any warranty of any |
| * kind, whether express or implied. |
| * |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/dma-mapping.h> |
| #include <linux/module.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/spinlock.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/crc32.h> |
| #include <linux/hardirq.h> |
| #include <linux/delay.h> |
| #include <linux/of_address.h> |
| #include <linux/of_device.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_mdio.h> |
| #include <linux/of_net.h> |
| #include <linux/of_platform.h> |
| |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ethtool.h> |
| #include <linux/skbuff.h> |
| |
| #include <asm/io.h> |
| #include <asm/delay.h> |
| #include <asm/mpc52xx.h> |
| |
| #include <linux/fsl/bestcomm/bestcomm.h> |
| #include <linux/fsl/bestcomm/fec.h> |
| |
| #include "fec_mpc52xx.h" |
| |
| #define DRIVER_NAME "mpc52xx-fec" |
| |
| /* Private driver data structure */ |
| struct mpc52xx_fec_priv { |
| struct net_device *ndev; |
| int duplex; |
| int speed; |
| int r_irq; |
| int t_irq; |
| struct mpc52xx_fec __iomem *fec; |
| struct bcom_task *rx_dmatsk; |
| struct bcom_task *tx_dmatsk; |
| spinlock_t lock; |
| int msg_enable; |
| |
| /* MDIO link details */ |
| unsigned int mdio_speed; |
| struct device_node *phy_node; |
| enum phy_state link; |
| int seven_wire_mode; |
| }; |
| |
| |
| static irqreturn_t mpc52xx_fec_interrupt(int, void *); |
| static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *); |
| static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *); |
| static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep); |
| static void mpc52xx_fec_start(struct net_device *dev); |
| static void mpc52xx_fec_reset(struct net_device *dev); |
| |
| #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \ |
| NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) |
| static int debug = -1; /* the above default */ |
| module_param(debug, int, 0); |
| MODULE_PARM_DESC(debug, "debugging messages level"); |
| |
| static void mpc52xx_fec_tx_timeout(struct net_device *dev, unsigned int txqueue) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| unsigned long flags; |
| |
| dev_warn(&dev->dev, "transmit timed out\n"); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| mpc52xx_fec_reset(dev); |
| dev->stats.tx_errors++; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| netif_wake_queue(dev); |
| } |
| |
| static void mpc52xx_fec_set_paddr(struct net_device *dev, const u8 *mac) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct mpc52xx_fec __iomem *fec = priv->fec; |
| |
| out_be32(&fec->paddr1, *(const u32 *)(&mac[0])); |
| out_be32(&fec->paddr2, (*(const u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE); |
| } |
| |
| static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr) |
| { |
| struct sockaddr *sock = addr; |
| |
| eth_hw_addr_set(dev, sock->sa_data); |
| |
| mpc52xx_fec_set_paddr(dev, sock->sa_data); |
| return 0; |
| } |
| |
| static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s) |
| { |
| while (!bcom_queue_empty(s)) { |
| struct bcom_fec_bd *bd; |
| struct sk_buff *skb; |
| |
| skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd); |
| dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len, |
| DMA_FROM_DEVICE); |
| kfree_skb(skb); |
| } |
| } |
| |
| static void |
| mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct bcom_fec_bd *bd; |
| |
| bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk); |
| bd->status = FEC_RX_BUFFER_SIZE; |
| bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data, |
| FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE); |
| bcom_submit_next_buffer(priv->rx_dmatsk, rskb); |
| } |
| |
| static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk) |
| { |
| struct sk_buff *skb; |
| |
| while (!bcom_queue_full(rxtsk)) { |
| skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE); |
| if (!skb) |
| return -EAGAIN; |
| |
| /* zero out the initial receive buffers to aid debugging */ |
| memset(skb->data, 0, FEC_RX_BUFFER_SIZE); |
| mpc52xx_fec_rx_submit(dev, skb); |
| } |
| return 0; |
| } |
| |
| /* based on generic_adjust_link from fs_enet-main.c */ |
| static void mpc52xx_fec_adjust_link(struct net_device *dev) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct phy_device *phydev = dev->phydev; |
| int new_state = 0; |
| |
| if (phydev->link != PHY_DOWN) { |
| if (phydev->duplex != priv->duplex) { |
| struct mpc52xx_fec __iomem *fec = priv->fec; |
| u32 rcntrl; |
| u32 tcntrl; |
| |
| new_state = 1; |
| priv->duplex = phydev->duplex; |
| |
| rcntrl = in_be32(&fec->r_cntrl); |
| tcntrl = in_be32(&fec->x_cntrl); |
| |
| rcntrl &= ~FEC_RCNTRL_DRT; |
| tcntrl &= ~FEC_TCNTRL_FDEN; |
| if (phydev->duplex == DUPLEX_FULL) |
| tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */ |
| else |
| rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */ |
| |
| out_be32(&fec->r_cntrl, rcntrl); |
| out_be32(&fec->x_cntrl, tcntrl); |
| } |
| |
| if (phydev->speed != priv->speed) { |
| new_state = 1; |
| priv->speed = phydev->speed; |
| } |
| |
| if (priv->link == PHY_DOWN) { |
| new_state = 1; |
| priv->link = phydev->link; |
| } |
| |
| } else if (priv->link) { |
| new_state = 1; |
| priv->link = PHY_DOWN; |
| priv->speed = 0; |
| priv->duplex = -1; |
| } |
| |
| if (new_state && netif_msg_link(priv)) |
| phy_print_status(phydev); |
| } |
| |
| static int mpc52xx_fec_open(struct net_device *dev) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct phy_device *phydev = NULL; |
| int err = -EBUSY; |
| |
| if (priv->phy_node) { |
| phydev = of_phy_connect(priv->ndev, priv->phy_node, |
| mpc52xx_fec_adjust_link, 0, 0); |
| if (!phydev) { |
| dev_err(&dev->dev, "of_phy_connect failed\n"); |
| return -ENODEV; |
| } |
| phy_start(phydev); |
| } |
| |
| if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED, |
| DRIVER_NAME "_ctrl", dev)) { |
| dev_err(&dev->dev, "ctrl interrupt request failed\n"); |
| goto free_phy; |
| } |
| if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0, |
| DRIVER_NAME "_rx", dev)) { |
| dev_err(&dev->dev, "rx interrupt request failed\n"); |
| goto free_ctrl_irq; |
| } |
| if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0, |
| DRIVER_NAME "_tx", dev)) { |
| dev_err(&dev->dev, "tx interrupt request failed\n"); |
| goto free_2irqs; |
| } |
| |
| bcom_fec_rx_reset(priv->rx_dmatsk); |
| bcom_fec_tx_reset(priv->tx_dmatsk); |
| |
| err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk); |
| if (err) { |
| dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n"); |
| goto free_irqs; |
| } |
| |
| bcom_enable(priv->rx_dmatsk); |
| bcom_enable(priv->tx_dmatsk); |
| |
| mpc52xx_fec_start(dev); |
| |
| netif_start_queue(dev); |
| |
| return 0; |
| |
| free_irqs: |
| free_irq(priv->t_irq, dev); |
| free_2irqs: |
| free_irq(priv->r_irq, dev); |
| free_ctrl_irq: |
| free_irq(dev->irq, dev); |
| free_phy: |
| if (phydev) { |
| phy_stop(phydev); |
| phy_disconnect(phydev); |
| } |
| |
| return err; |
| } |
| |
| static int mpc52xx_fec_close(struct net_device *dev) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct phy_device *phydev = dev->phydev; |
| |
| netif_stop_queue(dev); |
| |
| mpc52xx_fec_stop(dev, true); |
| |
| mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk); |
| |
| free_irq(dev->irq, dev); |
| free_irq(priv->r_irq, dev); |
| free_irq(priv->t_irq, dev); |
| |
| if (phydev) { |
| /* power down phy */ |
| phy_stop(phydev); |
| phy_disconnect(phydev); |
| } |
| |
| return 0; |
| } |
| |
| /* This will only be invoked if your driver is _not_ in XOFF state. |
| * What this means is that you need not check it, and that this |
| * invariant will hold if you make sure that the netif_*_queue() |
| * calls are done at the proper times. |
| */ |
| static netdev_tx_t |
| mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct bcom_fec_bd *bd; |
| unsigned long flags; |
| |
| if (bcom_queue_full(priv->tx_dmatsk)) { |
| if (net_ratelimit()) |
| dev_err(&dev->dev, "transmit queue overrun\n"); |
| return NETDEV_TX_BUSY; |
| } |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| bd = (struct bcom_fec_bd *) |
| bcom_prepare_next_buffer(priv->tx_dmatsk); |
| |
| bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC; |
| bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len, |
| DMA_TO_DEVICE); |
| |
| skb_tx_timestamp(skb); |
| bcom_submit_next_buffer(priv->tx_dmatsk, skb); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| if (bcom_queue_full(priv->tx_dmatsk)) { |
| netif_stop_queue(dev); |
| } |
| |
| return NETDEV_TX_OK; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void mpc52xx_fec_poll_controller(struct net_device *dev) |
| { |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| |
| disable_irq(priv->t_irq); |
| mpc52xx_fec_tx_interrupt(priv->t_irq, dev); |
| enable_irq(priv->t_irq); |
| disable_irq(priv->r_irq); |
| mpc52xx_fec_rx_interrupt(priv->r_irq, dev); |
| enable_irq(priv->r_irq); |
| } |
| #endif |
| |
| |
| /* This handles BestComm transmit task interrupts |
| */ |
| static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| |
| spin_lock(&priv->lock); |
| while (bcom_buffer_done(priv->tx_dmatsk)) { |
| struct sk_buff *skb; |
| struct bcom_fec_bd *bd; |
| skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL, |
| (struct bcom_bd **)&bd); |
| dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len, |
| DMA_TO_DEVICE); |
| |
| dev_consume_skb_irq(skb); |
| } |
| spin_unlock(&priv->lock); |
| |
| netif_wake_queue(dev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct sk_buff *rskb; /* received sk_buff */ |
| struct sk_buff *skb; /* new sk_buff to enqueue in its place */ |
| struct bcom_fec_bd *bd; |
| u32 status, physaddr; |
| int length; |
| |
| spin_lock(&priv->lock); |
| |
| while (bcom_buffer_done(priv->rx_dmatsk)) { |
| |
| rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status, |
| (struct bcom_bd **)&bd); |
| physaddr = bd->skb_pa; |
| |
| /* Test for errors in received frame */ |
| if (status & BCOM_FEC_RX_BD_ERRORS) { |
| /* Drop packet and reuse the buffer */ |
| mpc52xx_fec_rx_submit(dev, rskb); |
| dev->stats.rx_dropped++; |
| continue; |
| } |
| |
| /* skbs are allocated on open, so now we allocate a new one, |
| * and remove the old (with the packet) */ |
| skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE); |
| if (!skb) { |
| /* Can't get a new one : reuse the same & drop pkt */ |
| dev_notice(&dev->dev, "Low memory - dropped packet.\n"); |
| mpc52xx_fec_rx_submit(dev, rskb); |
| dev->stats.rx_dropped++; |
| continue; |
| } |
| |
| /* Enqueue the new sk_buff back on the hardware */ |
| mpc52xx_fec_rx_submit(dev, skb); |
| |
| /* Process the received skb - Drop the spin lock while |
| * calling into the network stack */ |
| spin_unlock(&priv->lock); |
| |
| dma_unmap_single(dev->dev.parent, physaddr, rskb->len, |
| DMA_FROM_DEVICE); |
| length = status & BCOM_FEC_RX_BD_LEN_MASK; |
| skb_put(rskb, length - 4); /* length without CRC32 */ |
| rskb->protocol = eth_type_trans(rskb, dev); |
| if (!skb_defer_rx_timestamp(rskb)) |
| netif_rx(rskb); |
| |
| spin_lock(&priv->lock); |
| } |
| |
| spin_unlock(&priv->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| struct mpc52xx_fec_priv *priv = netdev_priv(dev); |
| struct mpc52xx_fec __iomem *fec = priv->fec; |
| u32 ievent; |
| |
| ievent = in_be32(&fec->ievent); |
| |
| ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */ |
| if (!ievent) |
| return IRQ_NONE; |
| |
| out_be32(&fec->ievent, ievent); /* clear pending events */ |
| |
| /* on fifo error, soft-reset fec */ |
| if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) { |
| |
| if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR)) |
| dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n"); |
| if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR)) |
| dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n"); |
| |
| 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, 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_ethdev_address(np, ndev); |
| if (rv) { |
| struct mpc52xx_fec __iomem *fec = priv->fec; |
| u8 addr[ETH_ALEN] __aligned(4); |
| |
| /* |
| * If the MAC addresse is not provided via DT then read |
| * it back from the controller regs |
| */ |
| *(u32 *)(&addr[0]) = in_be32(&fec->paddr1); |
| *(u16 *)(&addr[4]) = in_be32(&fec->paddr2) >> 16; |
| eth_hw_addr_set(ndev, addr); |
| } |
| |
| /* |
| * 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(&op->dev) >> 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_property_read_bool(np, "fsl,7-wire-mode")) { |
| 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, |
| }, |
| .probe = mpc52xx_fec_probe, |
| .remove = mpc52xx_fec_remove, |
| #ifdef CONFIG_PM |
| .suspend = mpc52xx_fec_of_suspend, |
| .resume = mpc52xx_fec_of_resume, |
| #endif |
| }; |
| |
| |
| /* ======================================================================== */ |
| /* Module */ |
| /* ======================================================================== */ |
| |
| static struct platform_driver * const drivers[] = { |
| #ifdef CONFIG_FEC_MPC52xx_MDIO |
| &mpc52xx_fec_mdio_driver, |
| #endif |
| &mpc52xx_fec_driver, |
| }; |
| |
| static int __init |
| mpc52xx_fec_init(void) |
| { |
| return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
| } |
| |
| 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"); |
| MODULE_AUTHOR("Dale Farnsworth"); |
| MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC"); |