Enable the verify after the buffer write useful for debugging purpose.
If unsure, say N.
-config ETHOC
- tristate "OpenCores 10/100 Mbps Ethernet MAC support"
- depends on NET_ETHERNET && HAS_IOMEM && HAS_DMA
- select MII
- select PHYLIB
- select CRC32
- select BITREVERSE
- help
- Say Y here if you want to use the OpenCores 10/100 Mbps Ethernet MAC.
-
config GRETH
tristate "Aeroflex Gaisler GRETH Ethernet MAC support"
depends on SPARC
obj-$(CONFIG_NET_NETX) += netx-eth.o
obj-$(CONFIG_DM9000) += dm9000.o
obj-$(CONFIG_ENC28J60) += enc28j60.o
-obj-$(CONFIG_ETHOC) += ethoc.o
obj-$(CONFIG_GRETH) += greth.o
obj-$(CONFIG_DEV_APPLETALK) += appletalk/
source "drivers/net/ethernet/nvidia/Kconfig"
source "drivers/net/ethernet/octeon/Kconfig"
source "drivers/net/ethernet/oki-semi/Kconfig"
+
+config ETHOC
+ tristate "OpenCores 10/100 Mbps Ethernet MAC support"
+ depends on HAS_IOMEM && HAS_DMA
+ select MII
+ select PHYLIB
+ select CRC32
+ select BITREVERSE
+ ---help---
+ Say Y here if you want to use the OpenCores 10/100 Mbps Ethernet MAC.
+
source "drivers/net/ethernet/packetengines/Kconfig"
source "drivers/net/ethernet/pasemi/Kconfig"
source "drivers/net/ethernet/qlogic/Kconfig"
obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/
obj-$(CONFIG_OCTEON_MGMT_ETHERNET) += octeon/
obj-$(CONFIG_NET_VENDOR_OKI) += oki-semi/
+obj-$(CONFIG_ETHOC) += ethoc.o
obj-$(CONFIG_NET_PACKET_ENGINE) += packetengines/
obj-$(CONFIG_NET_VENDOR_PASEMI) += pasemi/
obj-$(CONFIG_NET_VENDOR_QLOGIC) += qlogic/
--- /dev/null
+/*
+ * linux/drivers/net/ethoc.c
+ *
+ * Copyright (C) 2007-2008 Avionic Design Development GmbH
+ * Copyright (C) 2008-2009 Avionic Design GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Written by Thierry Reding <thierry.reding@avionic-design.de>
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/crc32.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <net/ethoc.h>
+
+static int buffer_size = 0x8000; /* 32 KBytes */
+module_param(buffer_size, int, 0);
+MODULE_PARM_DESC(buffer_size, "DMA buffer allocation size");
+
+/* register offsets */
+#define MODER 0x00
+#define INT_SOURCE 0x04
+#define INT_MASK 0x08
+#define IPGT 0x0c
+#define IPGR1 0x10
+#define IPGR2 0x14
+#define PACKETLEN 0x18
+#define COLLCONF 0x1c
+#define TX_BD_NUM 0x20
+#define CTRLMODER 0x24
+#define MIIMODER 0x28
+#define MIICOMMAND 0x2c
+#define MIIADDRESS 0x30
+#define MIITX_DATA 0x34
+#define MIIRX_DATA 0x38
+#define MIISTATUS 0x3c
+#define MAC_ADDR0 0x40
+#define MAC_ADDR1 0x44
+#define ETH_HASH0 0x48
+#define ETH_HASH1 0x4c
+#define ETH_TXCTRL 0x50
+
+/* mode register */
+#define MODER_RXEN (1 << 0) /* receive enable */
+#define MODER_TXEN (1 << 1) /* transmit enable */
+#define MODER_NOPRE (1 << 2) /* no preamble */
+#define MODER_BRO (1 << 3) /* broadcast address */
+#define MODER_IAM (1 << 4) /* individual address mode */
+#define MODER_PRO (1 << 5) /* promiscuous mode */
+#define MODER_IFG (1 << 6) /* interframe gap for incoming frames */
+#define MODER_LOOP (1 << 7) /* loopback */
+#define MODER_NBO (1 << 8) /* no back-off */
+#define MODER_EDE (1 << 9) /* excess defer enable */
+#define MODER_FULLD (1 << 10) /* full duplex */
+#define MODER_RESET (1 << 11) /* FIXME: reset (undocumented) */
+#define MODER_DCRC (1 << 12) /* delayed CRC enable */
+#define MODER_CRC (1 << 13) /* CRC enable */
+#define MODER_HUGE (1 << 14) /* huge packets enable */
+#define MODER_PAD (1 << 15) /* padding enabled */
+#define MODER_RSM (1 << 16) /* receive small packets */
+
+/* interrupt source and mask registers */
+#define INT_MASK_TXF (1 << 0) /* transmit frame */
+#define INT_MASK_TXE (1 << 1) /* transmit error */
+#define INT_MASK_RXF (1 << 2) /* receive frame */
+#define INT_MASK_RXE (1 << 3) /* receive error */
+#define INT_MASK_BUSY (1 << 4)
+#define INT_MASK_TXC (1 << 5) /* transmit control frame */
+#define INT_MASK_RXC (1 << 6) /* receive control frame */
+
+#define INT_MASK_TX (INT_MASK_TXF | INT_MASK_TXE)
+#define INT_MASK_RX (INT_MASK_RXF | INT_MASK_RXE)
+
+#define INT_MASK_ALL ( \
+ INT_MASK_TXF | INT_MASK_TXE | \
+ INT_MASK_RXF | INT_MASK_RXE | \
+ INT_MASK_TXC | INT_MASK_RXC | \
+ INT_MASK_BUSY \
+ )
+
+/* packet length register */
+#define PACKETLEN_MIN(min) (((min) & 0xffff) << 16)
+#define PACKETLEN_MAX(max) (((max) & 0xffff) << 0)
+#define PACKETLEN_MIN_MAX(min, max) (PACKETLEN_MIN(min) | \
+ PACKETLEN_MAX(max))
+
+/* transmit buffer number register */
+#define TX_BD_NUM_VAL(x) (((x) <= 0x80) ? (x) : 0x80)
+
+/* control module mode register */
+#define CTRLMODER_PASSALL (1 << 0) /* pass all receive frames */
+#define CTRLMODER_RXFLOW (1 << 1) /* receive control flow */
+#define CTRLMODER_TXFLOW (1 << 2) /* transmit control flow */
+
+/* MII mode register */
+#define MIIMODER_CLKDIV(x) ((x) & 0xfe) /* needs to be an even number */
+#define MIIMODER_NOPRE (1 << 8) /* no preamble */
+
+/* MII command register */
+#define MIICOMMAND_SCAN (1 << 0) /* scan status */
+#define MIICOMMAND_READ (1 << 1) /* read status */
+#define MIICOMMAND_WRITE (1 << 2) /* write control data */
+
+/* MII address register */
+#define MIIADDRESS_FIAD(x) (((x) & 0x1f) << 0)
+#define MIIADDRESS_RGAD(x) (((x) & 0x1f) << 8)
+#define MIIADDRESS_ADDR(phy, reg) (MIIADDRESS_FIAD(phy) | \
+ MIIADDRESS_RGAD(reg))
+
+/* MII transmit data register */
+#define MIITX_DATA_VAL(x) ((x) & 0xffff)
+
+/* MII receive data register */
+#define MIIRX_DATA_VAL(x) ((x) & 0xffff)
+
+/* MII status register */
+#define MIISTATUS_LINKFAIL (1 << 0)
+#define MIISTATUS_BUSY (1 << 1)
+#define MIISTATUS_INVALID (1 << 2)
+
+/* TX buffer descriptor */
+#define TX_BD_CS (1 << 0) /* carrier sense lost */
+#define TX_BD_DF (1 << 1) /* defer indication */
+#define TX_BD_LC (1 << 2) /* late collision */
+#define TX_BD_RL (1 << 3) /* retransmission limit */
+#define TX_BD_RETRY_MASK (0x00f0)
+#define TX_BD_RETRY(x) (((x) & 0x00f0) >> 4)
+#define TX_BD_UR (1 << 8) /* transmitter underrun */
+#define TX_BD_CRC (1 << 11) /* TX CRC enable */
+#define TX_BD_PAD (1 << 12) /* pad enable for short packets */
+#define TX_BD_WRAP (1 << 13)
+#define TX_BD_IRQ (1 << 14) /* interrupt request enable */
+#define TX_BD_READY (1 << 15) /* TX buffer ready */
+#define TX_BD_LEN(x) (((x) & 0xffff) << 16)
+#define TX_BD_LEN_MASK (0xffff << 16)
+
+#define TX_BD_STATS (TX_BD_CS | TX_BD_DF | TX_BD_LC | \
+ TX_BD_RL | TX_BD_RETRY_MASK | TX_BD_UR)
+
+/* RX buffer descriptor */
+#define RX_BD_LC (1 << 0) /* late collision */
+#define RX_BD_CRC (1 << 1) /* RX CRC error */
+#define RX_BD_SF (1 << 2) /* short frame */
+#define RX_BD_TL (1 << 3) /* too long */
+#define RX_BD_DN (1 << 4) /* dribble nibble */
+#define RX_BD_IS (1 << 5) /* invalid symbol */
+#define RX_BD_OR (1 << 6) /* receiver overrun */
+#define RX_BD_MISS (1 << 7)
+#define RX_BD_CF (1 << 8) /* control frame */
+#define RX_BD_WRAP (1 << 13)
+#define RX_BD_IRQ (1 << 14) /* interrupt request enable */
+#define RX_BD_EMPTY (1 << 15)
+#define RX_BD_LEN(x) (((x) & 0xffff) << 16)
+
+#define RX_BD_STATS (RX_BD_LC | RX_BD_CRC | RX_BD_SF | RX_BD_TL | \
+ RX_BD_DN | RX_BD_IS | RX_BD_OR | RX_BD_MISS)
+
+#define ETHOC_BUFSIZ 1536
+#define ETHOC_ZLEN 64
+#define ETHOC_BD_BASE 0x400
+#define ETHOC_TIMEOUT (HZ / 2)
+#define ETHOC_MII_TIMEOUT (1 + (HZ / 5))
+
+/**
+ * struct ethoc - driver-private device structure
+ * @iobase: pointer to I/O memory region
+ * @membase: pointer to buffer memory region
+ * @dma_alloc: dma allocated buffer size
+ * @io_region_size: I/O memory region size
+ * @num_tx: number of send buffers
+ * @cur_tx: last send buffer written
+ * @dty_tx: last buffer actually sent
+ * @num_rx: number of receive buffers
+ * @cur_rx: current receive buffer
+ * @vma: pointer to array of virtual memory addresses for buffers
+ * @netdev: pointer to network device structure
+ * @napi: NAPI structure
+ * @msg_enable: device state flags
+ * @lock: device lock
+ * @phy: attached PHY
+ * @mdio: MDIO bus for PHY access
+ * @phy_id: address of attached PHY
+ */
+struct ethoc {
+ void __iomem *iobase;
+ void __iomem *membase;
+ int dma_alloc;
+ resource_size_t io_region_size;
+
+ unsigned int num_tx;
+ unsigned int cur_tx;
+ unsigned int dty_tx;
+
+ unsigned int num_rx;
+ unsigned int cur_rx;
+
+ void** vma;
+
+ struct net_device *netdev;
+ struct napi_struct napi;
+ u32 msg_enable;
+
+ spinlock_t lock;
+
+ struct phy_device *phy;
+ struct mii_bus *mdio;
+ s8 phy_id;
+};
+
+/**
+ * struct ethoc_bd - buffer descriptor
+ * @stat: buffer statistics
+ * @addr: physical memory address
+ */
+struct ethoc_bd {
+ u32 stat;
+ u32 addr;
+};
+
+static inline u32 ethoc_read(struct ethoc *dev, loff_t offset)
+{
+ return ioread32(dev->iobase + offset);
+}
+
+static inline void ethoc_write(struct ethoc *dev, loff_t offset, u32 data)
+{
+ iowrite32(data, dev->iobase + offset);
+}
+
+static inline void ethoc_read_bd(struct ethoc *dev, int index,
+ struct ethoc_bd *bd)
+{
+ loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd));
+ bd->stat = ethoc_read(dev, offset + 0);
+ bd->addr = ethoc_read(dev, offset + 4);
+}
+
+static inline void ethoc_write_bd(struct ethoc *dev, int index,
+ const struct ethoc_bd *bd)
+{
+ loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd));
+ ethoc_write(dev, offset + 0, bd->stat);
+ ethoc_write(dev, offset + 4, bd->addr);
+}
+
+static inline void ethoc_enable_irq(struct ethoc *dev, u32 mask)
+{
+ u32 imask = ethoc_read(dev, INT_MASK);
+ imask |= mask;
+ ethoc_write(dev, INT_MASK, imask);
+}
+
+static inline void ethoc_disable_irq(struct ethoc *dev, u32 mask)
+{
+ u32 imask = ethoc_read(dev, INT_MASK);
+ imask &= ~mask;
+ ethoc_write(dev, INT_MASK, imask);
+}
+
+static inline void ethoc_ack_irq(struct ethoc *dev, u32 mask)
+{
+ ethoc_write(dev, INT_SOURCE, mask);
+}
+
+static inline void ethoc_enable_rx_and_tx(struct ethoc *dev)
+{
+ u32 mode = ethoc_read(dev, MODER);
+ mode |= MODER_RXEN | MODER_TXEN;
+ ethoc_write(dev, MODER, mode);
+}
+
+static inline void ethoc_disable_rx_and_tx(struct ethoc *dev)
+{
+ u32 mode = ethoc_read(dev, MODER);
+ mode &= ~(MODER_RXEN | MODER_TXEN);
+ ethoc_write(dev, MODER, mode);
+}
+
+static int ethoc_init_ring(struct ethoc *dev, unsigned long mem_start)
+{
+ struct ethoc_bd bd;
+ int i;
+ void* vma;
+
+ dev->cur_tx = 0;
+ dev->dty_tx = 0;
+ dev->cur_rx = 0;
+
+ ethoc_write(dev, TX_BD_NUM, dev->num_tx);
+
+ /* setup transmission buffers */
+ bd.addr = mem_start;
+ bd.stat = TX_BD_IRQ | TX_BD_CRC;
+ vma = dev->membase;
+
+ for (i = 0; i < dev->num_tx; i++) {
+ if (i == dev->num_tx - 1)
+ bd.stat |= TX_BD_WRAP;
+
+ ethoc_write_bd(dev, i, &bd);
+ bd.addr += ETHOC_BUFSIZ;
+
+ dev->vma[i] = vma;
+ vma += ETHOC_BUFSIZ;
+ }
+
+ bd.stat = RX_BD_EMPTY | RX_BD_IRQ;
+
+ for (i = 0; i < dev->num_rx; i++) {
+ if (i == dev->num_rx - 1)
+ bd.stat |= RX_BD_WRAP;
+
+ ethoc_write_bd(dev, dev->num_tx + i, &bd);
+ bd.addr += ETHOC_BUFSIZ;
+
+ dev->vma[dev->num_tx + i] = vma;
+ vma += ETHOC_BUFSIZ;
+ }
+
+ return 0;
+}
+
+static int ethoc_reset(struct ethoc *dev)
+{
+ u32 mode;
+
+ /* TODO: reset controller? */
+
+ ethoc_disable_rx_and_tx(dev);
+
+ /* TODO: setup registers */
+
+ /* enable FCS generation and automatic padding */
+ mode = ethoc_read(dev, MODER);
+ mode |= MODER_CRC | MODER_PAD;
+ ethoc_write(dev, MODER, mode);
+
+ /* set full-duplex mode */
+ mode = ethoc_read(dev, MODER);
+ mode |= MODER_FULLD;
+ ethoc_write(dev, MODER, mode);
+ ethoc_write(dev, IPGT, 0x15);
+
+ ethoc_ack_irq(dev, INT_MASK_ALL);
+ ethoc_enable_irq(dev, INT_MASK_ALL);
+ ethoc_enable_rx_and_tx(dev);
+ return 0;
+}
+
+static unsigned int ethoc_update_rx_stats(struct ethoc *dev,
+ struct ethoc_bd *bd)
+{
+ struct net_device *netdev = dev->netdev;
+ unsigned int ret = 0;
+
+ if (bd->stat & RX_BD_TL) {
+ dev_err(&netdev->dev, "RX: frame too long\n");
+ netdev->stats.rx_length_errors++;
+ ret++;
+ }
+
+ if (bd->stat & RX_BD_SF) {
+ dev_err(&netdev->dev, "RX: frame too short\n");
+ netdev->stats.rx_length_errors++;
+ ret++;
+ }
+
+ if (bd->stat & RX_BD_DN) {
+ dev_err(&netdev->dev, "RX: dribble nibble\n");
+ netdev->stats.rx_frame_errors++;
+ }
+
+ if (bd->stat & RX_BD_CRC) {
+ dev_err(&netdev->dev, "RX: wrong CRC\n");
+ netdev->stats.rx_crc_errors++;
+ ret++;
+ }
+
+ if (bd->stat & RX_BD_OR) {
+ dev_err(&netdev->dev, "RX: overrun\n");
+ netdev->stats.rx_over_errors++;
+ ret++;
+ }
+
+ if (bd->stat & RX_BD_MISS)
+ netdev->stats.rx_missed_errors++;
+
+ if (bd->stat & RX_BD_LC) {
+ dev_err(&netdev->dev, "RX: late collision\n");
+ netdev->stats.collisions++;
+ ret++;
+ }
+
+ return ret;
+}
+
+static int ethoc_rx(struct net_device *dev, int limit)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ int count;
+
+ for (count = 0; count < limit; ++count) {
+ unsigned int entry;
+ struct ethoc_bd bd;
+
+ entry = priv->num_tx + priv->cur_rx;
+ ethoc_read_bd(priv, entry, &bd);
+ if (bd.stat & RX_BD_EMPTY) {
+ ethoc_ack_irq(priv, INT_MASK_RX);
+ /* If packet (interrupt) came in between checking
+ * BD_EMTPY and clearing the interrupt source, then we
+ * risk missing the packet as the RX interrupt won't
+ * trigger right away when we reenable it; hence, check
+ * BD_EMTPY here again to make sure there isn't such a
+ * packet waiting for us...
+ */
+ ethoc_read_bd(priv, entry, &bd);
+ if (bd.stat & RX_BD_EMPTY)
+ break;
+ }
+
+ if (ethoc_update_rx_stats(priv, &bd) == 0) {
+ int size = bd.stat >> 16;
+ struct sk_buff *skb;
+
+ size -= 4; /* strip the CRC */
+ skb = netdev_alloc_skb_ip_align(dev, size);
+
+ if (likely(skb)) {
+ void *src = priv->vma[entry];
+ memcpy_fromio(skb_put(skb, size), src, size);
+ skb->protocol = eth_type_trans(skb, dev);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += size;
+ netif_receive_skb(skb);
+ } else {
+ if (net_ratelimit())
+ dev_warn(&dev->dev, "low on memory - "
+ "packet dropped\n");
+
+ dev->stats.rx_dropped++;
+ break;
+ }
+ }
+
+ /* clear the buffer descriptor so it can be reused */
+ bd.stat &= ~RX_BD_STATS;
+ bd.stat |= RX_BD_EMPTY;
+ ethoc_write_bd(priv, entry, &bd);
+ if (++priv->cur_rx == priv->num_rx)
+ priv->cur_rx = 0;
+ }
+
+ return count;
+}
+
+static void ethoc_update_tx_stats(struct ethoc *dev, struct ethoc_bd *bd)
+{
+ struct net_device *netdev = dev->netdev;
+
+ if (bd->stat & TX_BD_LC) {
+ dev_err(&netdev->dev, "TX: late collision\n");
+ netdev->stats.tx_window_errors++;
+ }
+
+ if (bd->stat & TX_BD_RL) {
+ dev_err(&netdev->dev, "TX: retransmit limit\n");
+ netdev->stats.tx_aborted_errors++;
+ }
+
+ if (bd->stat & TX_BD_UR) {
+ dev_err(&netdev->dev, "TX: underrun\n");
+ netdev->stats.tx_fifo_errors++;
+ }
+
+ if (bd->stat & TX_BD_CS) {
+ dev_err(&netdev->dev, "TX: carrier sense lost\n");
+ netdev->stats.tx_carrier_errors++;
+ }
+
+ if (bd->stat & TX_BD_STATS)
+ netdev->stats.tx_errors++;
+
+ netdev->stats.collisions += (bd->stat >> 4) & 0xf;
+ netdev->stats.tx_bytes += bd->stat >> 16;
+ netdev->stats.tx_packets++;
+}
+
+static int ethoc_tx(struct net_device *dev, int limit)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ int count;
+ struct ethoc_bd bd;
+
+ for (count = 0; count < limit; ++count) {
+ unsigned int entry;
+
+ entry = priv->dty_tx & (priv->num_tx-1);
+
+ ethoc_read_bd(priv, entry, &bd);
+
+ if (bd.stat & TX_BD_READY || (priv->dty_tx == priv->cur_tx)) {
+ ethoc_ack_irq(priv, INT_MASK_TX);
+ /* If interrupt came in between reading in the BD
+ * and clearing the interrupt source, then we risk
+ * missing the event as the TX interrupt won't trigger
+ * right away when we reenable it; hence, check
+ * BD_EMPTY here again to make sure there isn't such an
+ * event pending...
+ */
+ ethoc_read_bd(priv, entry, &bd);
+ if (bd.stat & TX_BD_READY ||
+ (priv->dty_tx == priv->cur_tx))
+ break;
+ }
+
+ ethoc_update_tx_stats(priv, &bd);
+ priv->dty_tx++;
+ }
+
+ if ((priv->cur_tx - priv->dty_tx) <= (priv->num_tx / 2))
+ netif_wake_queue(dev);
+
+ return count;
+}
+
+static irqreturn_t ethoc_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct ethoc *priv = netdev_priv(dev);
+ u32 pending;
+ u32 mask;
+
+ /* Figure out what triggered the interrupt...
+ * The tricky bit here is that the interrupt source bits get
+ * set in INT_SOURCE for an event regardless of whether that
+ * event is masked or not. Thus, in order to figure out what
+ * triggered the interrupt, we need to remove the sources
+ * for all events that are currently masked. This behaviour
+ * is not particularly well documented but reasonable...
+ */
+ mask = ethoc_read(priv, INT_MASK);
+ pending = ethoc_read(priv, INT_SOURCE);
+ pending &= mask;
+
+ if (unlikely(pending == 0)) {
+ return IRQ_NONE;
+ }
+
+ ethoc_ack_irq(priv, pending);
+
+ /* We always handle the dropped packet interrupt */
+ if (pending & INT_MASK_BUSY) {
+ dev_err(&dev->dev, "packet dropped\n");
+ dev->stats.rx_dropped++;
+ }
+
+ /* Handle receive/transmit event by switching to polling */
+ if (pending & (INT_MASK_TX | INT_MASK_RX)) {
+ ethoc_disable_irq(priv, INT_MASK_TX | INT_MASK_RX);
+ napi_schedule(&priv->napi);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int ethoc_get_mac_address(struct net_device *dev, void *addr)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ u8 *mac = (u8 *)addr;
+ u32 reg;
+
+ reg = ethoc_read(priv, MAC_ADDR0);
+ mac[2] = (reg >> 24) & 0xff;
+ mac[3] = (reg >> 16) & 0xff;
+ mac[4] = (reg >> 8) & 0xff;
+ mac[5] = (reg >> 0) & 0xff;
+
+ reg = ethoc_read(priv, MAC_ADDR1);
+ mac[0] = (reg >> 8) & 0xff;
+ mac[1] = (reg >> 0) & 0xff;
+
+ return 0;
+}
+
+static int ethoc_poll(struct napi_struct *napi, int budget)
+{
+ struct ethoc *priv = container_of(napi, struct ethoc, napi);
+ int rx_work_done = 0;
+ int tx_work_done = 0;
+
+ rx_work_done = ethoc_rx(priv->netdev, budget);
+ tx_work_done = ethoc_tx(priv->netdev, budget);
+
+ if (rx_work_done < budget && tx_work_done < budget) {
+ napi_complete(napi);
+ ethoc_enable_irq(priv, INT_MASK_TX | INT_MASK_RX);
+ }
+
+ return rx_work_done;
+}
+
+static int ethoc_mdio_read(struct mii_bus *bus, int phy, int reg)
+{
+ struct ethoc *priv = bus->priv;
+ int i;
+
+ ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg));
+ ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ);
+
+ for (i=0; i < 5; i++) {
+ u32 status = ethoc_read(priv, MIISTATUS);
+ if (!(status & MIISTATUS_BUSY)) {
+ u32 data = ethoc_read(priv, MIIRX_DATA);
+ /* reset MII command register */
+ ethoc_write(priv, MIICOMMAND, 0);
+ return data;
+ }
+ usleep_range(100,200);
+ }
+
+ return -EBUSY;
+}
+
+static int ethoc_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
+{
+ struct ethoc *priv = bus->priv;
+ int i;
+
+ ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg));
+ ethoc_write(priv, MIITX_DATA, val);
+ ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE);
+
+ for (i=0; i < 5; i++) {
+ u32 stat = ethoc_read(priv, MIISTATUS);
+ if (!(stat & MIISTATUS_BUSY)) {
+ /* reset MII command register */
+ ethoc_write(priv, MIICOMMAND, 0);
+ return 0;
+ }
+ usleep_range(100,200);
+ }
+
+ return -EBUSY;
+}
+
+static int ethoc_mdio_reset(struct mii_bus *bus)
+{
+ return 0;
+}
+
+static void ethoc_mdio_poll(struct net_device *dev)
+{
+}
+
+static int __devinit ethoc_mdio_probe(struct net_device *dev)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ struct phy_device *phy;
+ int err;
+
+ if (priv->phy_id != -1) {
+ phy = priv->mdio->phy_map[priv->phy_id];
+ } else {
+ phy = phy_find_first(priv->mdio);
+ }
+
+ if (!phy) {
+ dev_err(&dev->dev, "no PHY found\n");
+ return -ENXIO;
+ }
+
+ err = phy_connect_direct(dev, phy, ethoc_mdio_poll, 0,
+ PHY_INTERFACE_MODE_GMII);
+ if (err) {
+ dev_err(&dev->dev, "could not attach to PHY\n");
+ return err;
+ }
+
+ priv->phy = phy;
+ return 0;
+}
+
+static int ethoc_open(struct net_device *dev)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ int ret;
+
+ ret = request_irq(dev->irq, ethoc_interrupt, IRQF_SHARED,
+ dev->name, dev);
+ if (ret)
+ return ret;
+
+ ethoc_init_ring(priv, dev->mem_start);
+ ethoc_reset(priv);
+
+ if (netif_queue_stopped(dev)) {
+ dev_dbg(&dev->dev, " resuming queue\n");
+ netif_wake_queue(dev);
+ } else {
+ dev_dbg(&dev->dev, " starting queue\n");
+ netif_start_queue(dev);
+ }
+
+ phy_start(priv->phy);
+ napi_enable(&priv->napi);
+
+ if (netif_msg_ifup(priv)) {
+ dev_info(&dev->dev, "I/O: %08lx Memory: %08lx-%08lx\n",
+ dev->base_addr, dev->mem_start, dev->mem_end);
+ }
+
+ return 0;
+}
+
+static int ethoc_stop(struct net_device *dev)
+{
+ struct ethoc *priv = netdev_priv(dev);
+
+ napi_disable(&priv->napi);
+
+ if (priv->phy)
+ phy_stop(priv->phy);
+
+ ethoc_disable_rx_and_tx(priv);
+ free_irq(dev->irq, dev);
+
+ if (!netif_queue_stopped(dev))
+ netif_stop_queue(dev);
+
+ return 0;
+}
+
+static int ethoc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ struct mii_ioctl_data *mdio = if_mii(ifr);
+ struct phy_device *phy = NULL;
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (cmd != SIOCGMIIPHY) {
+ if (mdio->phy_id >= PHY_MAX_ADDR)
+ return -ERANGE;
+
+ phy = priv->mdio->phy_map[mdio->phy_id];
+ if (!phy)
+ return -ENODEV;
+ } else {
+ phy = priv->phy;
+ }
+
+ return phy_mii_ioctl(phy, ifr, cmd);
+}
+
+static int ethoc_config(struct net_device *dev, struct ifmap *map)
+{
+ return -ENOSYS;
+}
+
+static int ethoc_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ u8 *mac = (u8 *)addr;
+
+ ethoc_write(priv, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) |
+ (mac[4] << 8) | (mac[5] << 0));
+ ethoc_write(priv, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0));
+
+ return 0;
+}
+
+static void ethoc_set_multicast_list(struct net_device *dev)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ u32 mode = ethoc_read(priv, MODER);
+ struct netdev_hw_addr *ha;
+ u32 hash[2] = { 0, 0 };
+
+ /* set loopback mode if requested */
+ if (dev->flags & IFF_LOOPBACK)
+ mode |= MODER_LOOP;
+ else
+ mode &= ~MODER_LOOP;
+
+ /* receive broadcast frames if requested */
+ if (dev->flags & IFF_BROADCAST)
+ mode &= ~MODER_BRO;
+ else
+ mode |= MODER_BRO;
+
+ /* enable promiscuous mode if requested */
+ if (dev->flags & IFF_PROMISC)
+ mode |= MODER_PRO;
+ else
+ mode &= ~MODER_PRO;
+
+ ethoc_write(priv, MODER, mode);
+
+ /* receive multicast frames */
+ if (dev->flags & IFF_ALLMULTI) {
+ hash[0] = 0xffffffff;
+ hash[1] = 0xffffffff;
+ } else {
+ netdev_for_each_mc_addr(ha, dev) {
+ u32 crc = ether_crc(ETH_ALEN, ha->addr);
+ int bit = (crc >> 26) & 0x3f;
+ hash[bit >> 5] |= 1 << (bit & 0x1f);
+ }
+ }
+
+ ethoc_write(priv, ETH_HASH0, hash[0]);
+ ethoc_write(priv, ETH_HASH1, hash[1]);
+}
+
+static int ethoc_change_mtu(struct net_device *dev, int new_mtu)
+{
+ return -ENOSYS;
+}
+
+static void ethoc_tx_timeout(struct net_device *dev)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ u32 pending = ethoc_read(priv, INT_SOURCE);
+ if (likely(pending))
+ ethoc_interrupt(dev->irq, dev);
+}
+
+static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ethoc *priv = netdev_priv(dev);
+ struct ethoc_bd bd;
+ unsigned int entry;
+ void *dest;
+
+ if (unlikely(skb->len > ETHOC_BUFSIZ)) {
+ dev->stats.tx_errors++;
+ goto out;
+ }
+
+ entry = priv->cur_tx % priv->num_tx;
+ spin_lock_irq(&priv->lock);
+ priv->cur_tx++;
+
+ ethoc_read_bd(priv, entry, &bd);
+ if (unlikely(skb->len < ETHOC_ZLEN))
+ bd.stat |= TX_BD_PAD;
+ else
+ bd.stat &= ~TX_BD_PAD;
+
+ dest = priv->vma[entry];
+ memcpy_toio(dest, skb->data, skb->len);
+
+ bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK);
+ bd.stat |= TX_BD_LEN(skb->len);
+ ethoc_write_bd(priv, entry, &bd);
+
+ bd.stat |= TX_BD_READY;
+ ethoc_write_bd(priv, entry, &bd);
+
+ if (priv->cur_tx == (priv->dty_tx + priv->num_tx)) {
+ dev_dbg(&dev->dev, "stopping queue\n");
+ netif_stop_queue(dev);
+ }
+
+ spin_unlock_irq(&priv->lock);
+ skb_tx_timestamp(skb);
+out:
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static const struct net_device_ops ethoc_netdev_ops = {
+ .ndo_open = ethoc_open,
+ .ndo_stop = ethoc_stop,
+ .ndo_do_ioctl = ethoc_ioctl,
+ .ndo_set_config = ethoc_config,
+ .ndo_set_mac_address = ethoc_set_mac_address,
+ .ndo_set_multicast_list = ethoc_set_multicast_list,
+ .ndo_change_mtu = ethoc_change_mtu,
+ .ndo_tx_timeout = ethoc_tx_timeout,
+ .ndo_start_xmit = ethoc_start_xmit,
+};
+
+/**
+ * ethoc_probe() - initialize OpenCores ethernet MAC
+ * pdev: platform device
+ */
+static int __devinit ethoc_probe(struct platform_device *pdev)
+{
+ struct net_device *netdev = NULL;
+ struct resource *res = NULL;
+ struct resource *mmio = NULL;
+ struct resource *mem = NULL;
+ struct ethoc *priv = NULL;
+ unsigned int phy;
+ int num_bd;
+ int ret = 0;
+
+ /* allocate networking device */
+ netdev = alloc_etherdev(sizeof(struct ethoc));
+ if (!netdev) {
+ dev_err(&pdev->dev, "cannot allocate network device\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+ platform_set_drvdata(pdev, netdev);
+
+ /* obtain I/O memory space */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "cannot obtain I/O memory space\n");
+ ret = -ENXIO;
+ goto free;
+ }
+
+ mmio = devm_request_mem_region(&pdev->dev, res->start,
+ resource_size(res), res->name);
+ if (!mmio) {
+ dev_err(&pdev->dev, "cannot request I/O memory space\n");
+ ret = -ENXIO;
+ goto free;
+ }
+
+ netdev->base_addr = mmio->start;
+
+ /* obtain buffer memory space */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (res) {
+ mem = devm_request_mem_region(&pdev->dev, res->start,
+ resource_size(res), res->name);
+ if (!mem) {
+ dev_err(&pdev->dev, "cannot request memory space\n");
+ ret = -ENXIO;
+ goto free;
+ }
+
+ netdev->mem_start = mem->start;
+ netdev->mem_end = mem->end;
+ }
+
+
+ /* obtain device IRQ number */
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "cannot obtain IRQ\n");
+ ret = -ENXIO;
+ goto free;
+ }
+
+ netdev->irq = res->start;
+
+ /* setup driver-private data */
+ priv = netdev_priv(netdev);
+ priv->netdev = netdev;
+ priv->dma_alloc = 0;
+ priv->io_region_size = resource_size(mmio);
+
+ priv->iobase = devm_ioremap_nocache(&pdev->dev, netdev->base_addr,
+ resource_size(mmio));
+ if (!priv->iobase) {
+ dev_err(&pdev->dev, "cannot remap I/O memory space\n");
+ ret = -ENXIO;
+ goto error;
+ }
+
+ if (netdev->mem_end) {
+ priv->membase = devm_ioremap_nocache(&pdev->dev,
+ netdev->mem_start, resource_size(mem));
+ if (!priv->membase) {
+ dev_err(&pdev->dev, "cannot remap memory space\n");
+ ret = -ENXIO;
+ goto error;
+ }
+ } else {
+ /* Allocate buffer memory */
+ priv->membase = dmam_alloc_coherent(&pdev->dev,
+ buffer_size, (void *)&netdev->mem_start,
+ GFP_KERNEL);
+ if (!priv->membase) {
+ dev_err(&pdev->dev, "cannot allocate %dB buffer\n",
+ buffer_size);
+ ret = -ENOMEM;
+ goto error;
+ }
+ netdev->mem_end = netdev->mem_start + buffer_size;
+ priv->dma_alloc = buffer_size;
+ }
+
+ /* calculate the number of TX/RX buffers, maximum 128 supported */
+ num_bd = min_t(unsigned int,
+ 128, (netdev->mem_end - netdev->mem_start + 1) / ETHOC_BUFSIZ);
+ if (num_bd < 4) {
+ ret = -ENODEV;
+ goto error;
+ }
+ /* num_tx must be a power of two */
+ priv->num_tx = rounddown_pow_of_two(num_bd >> 1);
+ priv->num_rx = num_bd - priv->num_tx;
+
+ dev_dbg(&pdev->dev, "ethoc: num_tx: %d num_rx: %d\n",
+ priv->num_tx, priv->num_rx);
+
+ priv->vma = devm_kzalloc(&pdev->dev, num_bd*sizeof(void*), GFP_KERNEL);
+ if (!priv->vma) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ /* Allow the platform setup code to pass in a MAC address. */
+ if (pdev->dev.platform_data) {
+ struct ethoc_platform_data *pdata = pdev->dev.platform_data;
+ memcpy(netdev->dev_addr, pdata->hwaddr, IFHWADDRLEN);
+ priv->phy_id = pdata->phy_id;
+ } else {
+ priv->phy_id = -1;
+
+#ifdef CONFIG_OF
+ {
+ const uint8_t* mac;
+
+ mac = of_get_property(pdev->dev.of_node,
+ "local-mac-address",
+ NULL);
+ if (mac)
+ memcpy(netdev->dev_addr, mac, IFHWADDRLEN);
+ }
+#endif
+ }
+
+ /* Check that the given MAC address is valid. If it isn't, read the
+ * current MAC from the controller. */
+ if (!is_valid_ether_addr(netdev->dev_addr))
+ ethoc_get_mac_address(netdev, netdev->dev_addr);
+
+ /* Check the MAC again for validity, if it still isn't choose and
+ * program a random one. */
+ if (!is_valid_ether_addr(netdev->dev_addr))
+ random_ether_addr(netdev->dev_addr);
+
+ ethoc_set_mac_address(netdev, netdev->dev_addr);
+
+ /* register MII bus */
+ priv->mdio = mdiobus_alloc();
+ if (!priv->mdio) {
+ ret = -ENOMEM;
+ goto free;
+ }
+
+ priv->mdio->name = "ethoc-mdio";
+ snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%d",
+ priv->mdio->name, pdev->id);
+ priv->mdio->read = ethoc_mdio_read;
+ priv->mdio->write = ethoc_mdio_write;
+ priv->mdio->reset = ethoc_mdio_reset;
+ priv->mdio->priv = priv;
+
+ priv->mdio->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+ if (!priv->mdio->irq) {
+ ret = -ENOMEM;
+ goto free_mdio;
+ }
+
+ for (phy = 0; phy < PHY_MAX_ADDR; phy++)
+ priv->mdio->irq[phy] = PHY_POLL;
+
+ ret = mdiobus_register(priv->mdio);
+ if (ret) {
+ dev_err(&netdev->dev, "failed to register MDIO bus\n");
+ goto free_mdio;
+ }
+
+ ret = ethoc_mdio_probe(netdev);
+ if (ret) {
+ dev_err(&netdev->dev, "failed to probe MDIO bus\n");
+ goto error;
+ }
+
+ ether_setup(netdev);
+
+ /* setup the net_device structure */
+ netdev->netdev_ops = ðoc_netdev_ops;
+ netdev->watchdog_timeo = ETHOC_TIMEOUT;
+ netdev->features |= 0;
+
+ /* setup NAPI */
+ netif_napi_add(netdev, &priv->napi, ethoc_poll, 64);
+
+ spin_lock_init(&priv->lock);
+
+ ret = register_netdev(netdev);
+ if (ret < 0) {
+ dev_err(&netdev->dev, "failed to register interface\n");
+ goto error2;
+ }
+
+ goto out;
+
+error2:
+ netif_napi_del(&priv->napi);
+error:
+ mdiobus_unregister(priv->mdio);
+free_mdio:
+ kfree(priv->mdio->irq);
+ mdiobus_free(priv->mdio);
+free:
+ free_netdev(netdev);
+out:
+ return ret;
+}
+
+/**
+ * ethoc_remove() - shutdown OpenCores ethernet MAC
+ * @pdev: platform device
+ */
+static int __devexit ethoc_remove(struct platform_device *pdev)
+{
+ struct net_device *netdev = platform_get_drvdata(pdev);
+ struct ethoc *priv = netdev_priv(netdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (netdev) {
+ netif_napi_del(&priv->napi);
+ phy_disconnect(priv->phy);
+ priv->phy = NULL;
+
+ if (priv->mdio) {
+ mdiobus_unregister(priv->mdio);
+ kfree(priv->mdio->irq);
+ mdiobus_free(priv->mdio);
+ }
+ unregister_netdev(netdev);
+ free_netdev(netdev);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int ethoc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ return -ENOSYS;
+}
+
+static int ethoc_resume(struct platform_device *pdev)
+{
+ return -ENOSYS;
+}
+#else
+# define ethoc_suspend NULL
+# define ethoc_resume NULL
+#endif
+
+static struct of_device_id ethoc_match[] = {
+ { .compatible = "opencores,ethoc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ethoc_match);
+
+static struct platform_driver ethoc_driver = {
+ .probe = ethoc_probe,
+ .remove = __devexit_p(ethoc_remove),
+ .suspend = ethoc_suspend,
+ .resume = ethoc_resume,
+ .driver = {
+ .name = "ethoc",
+ .owner = THIS_MODULE,
+ .of_match_table = ethoc_match,
+ },
+};
+
+static int __init ethoc_init(void)
+{
+ return platform_driver_register(ðoc_driver);
+}
+
+static void __exit ethoc_exit(void)
+{
+ platform_driver_unregister(ðoc_driver);
+}
+
+module_init(ethoc_init);
+module_exit(ethoc_exit);
+
+MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
+MODULE_DESCRIPTION("OpenCores Ethernet MAC driver");
+MODULE_LICENSE("GPL v2");
+
+++ /dev/null
-/*
- * linux/drivers/net/ethoc.c
- *
- * Copyright (C) 2007-2008 Avionic Design Development GmbH
- * Copyright (C) 2008-2009 Avionic Design GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Written by Thierry Reding <thierry.reding@avionic-design.de>
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/etherdevice.h>
-#include <linux/crc32.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/mii.h>
-#include <linux/phy.h>
-#include <linux/platform_device.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <net/ethoc.h>
-
-static int buffer_size = 0x8000; /* 32 KBytes */
-module_param(buffer_size, int, 0);
-MODULE_PARM_DESC(buffer_size, "DMA buffer allocation size");
-
-/* register offsets */
-#define MODER 0x00
-#define INT_SOURCE 0x04
-#define INT_MASK 0x08
-#define IPGT 0x0c
-#define IPGR1 0x10
-#define IPGR2 0x14
-#define PACKETLEN 0x18
-#define COLLCONF 0x1c
-#define TX_BD_NUM 0x20
-#define CTRLMODER 0x24
-#define MIIMODER 0x28
-#define MIICOMMAND 0x2c
-#define MIIADDRESS 0x30
-#define MIITX_DATA 0x34
-#define MIIRX_DATA 0x38
-#define MIISTATUS 0x3c
-#define MAC_ADDR0 0x40
-#define MAC_ADDR1 0x44
-#define ETH_HASH0 0x48
-#define ETH_HASH1 0x4c
-#define ETH_TXCTRL 0x50
-
-/* mode register */
-#define MODER_RXEN (1 << 0) /* receive enable */
-#define MODER_TXEN (1 << 1) /* transmit enable */
-#define MODER_NOPRE (1 << 2) /* no preamble */
-#define MODER_BRO (1 << 3) /* broadcast address */
-#define MODER_IAM (1 << 4) /* individual address mode */
-#define MODER_PRO (1 << 5) /* promiscuous mode */
-#define MODER_IFG (1 << 6) /* interframe gap for incoming frames */
-#define MODER_LOOP (1 << 7) /* loopback */
-#define MODER_NBO (1 << 8) /* no back-off */
-#define MODER_EDE (1 << 9) /* excess defer enable */
-#define MODER_FULLD (1 << 10) /* full duplex */
-#define MODER_RESET (1 << 11) /* FIXME: reset (undocumented) */
-#define MODER_DCRC (1 << 12) /* delayed CRC enable */
-#define MODER_CRC (1 << 13) /* CRC enable */
-#define MODER_HUGE (1 << 14) /* huge packets enable */
-#define MODER_PAD (1 << 15) /* padding enabled */
-#define MODER_RSM (1 << 16) /* receive small packets */
-
-/* interrupt source and mask registers */
-#define INT_MASK_TXF (1 << 0) /* transmit frame */
-#define INT_MASK_TXE (1 << 1) /* transmit error */
-#define INT_MASK_RXF (1 << 2) /* receive frame */
-#define INT_MASK_RXE (1 << 3) /* receive error */
-#define INT_MASK_BUSY (1 << 4)
-#define INT_MASK_TXC (1 << 5) /* transmit control frame */
-#define INT_MASK_RXC (1 << 6) /* receive control frame */
-
-#define INT_MASK_TX (INT_MASK_TXF | INT_MASK_TXE)
-#define INT_MASK_RX (INT_MASK_RXF | INT_MASK_RXE)
-
-#define INT_MASK_ALL ( \
- INT_MASK_TXF | INT_MASK_TXE | \
- INT_MASK_RXF | INT_MASK_RXE | \
- INT_MASK_TXC | INT_MASK_RXC | \
- INT_MASK_BUSY \
- )
-
-/* packet length register */
-#define PACKETLEN_MIN(min) (((min) & 0xffff) << 16)
-#define PACKETLEN_MAX(max) (((max) & 0xffff) << 0)
-#define PACKETLEN_MIN_MAX(min, max) (PACKETLEN_MIN(min) | \
- PACKETLEN_MAX(max))
-
-/* transmit buffer number register */
-#define TX_BD_NUM_VAL(x) (((x) <= 0x80) ? (x) : 0x80)
-
-/* control module mode register */
-#define CTRLMODER_PASSALL (1 << 0) /* pass all receive frames */
-#define CTRLMODER_RXFLOW (1 << 1) /* receive control flow */
-#define CTRLMODER_TXFLOW (1 << 2) /* transmit control flow */
-
-/* MII mode register */
-#define MIIMODER_CLKDIV(x) ((x) & 0xfe) /* needs to be an even number */
-#define MIIMODER_NOPRE (1 << 8) /* no preamble */
-
-/* MII command register */
-#define MIICOMMAND_SCAN (1 << 0) /* scan status */
-#define MIICOMMAND_READ (1 << 1) /* read status */
-#define MIICOMMAND_WRITE (1 << 2) /* write control data */
-
-/* MII address register */
-#define MIIADDRESS_FIAD(x) (((x) & 0x1f) << 0)
-#define MIIADDRESS_RGAD(x) (((x) & 0x1f) << 8)
-#define MIIADDRESS_ADDR(phy, reg) (MIIADDRESS_FIAD(phy) | \
- MIIADDRESS_RGAD(reg))
-
-/* MII transmit data register */
-#define MIITX_DATA_VAL(x) ((x) & 0xffff)
-
-/* MII receive data register */
-#define MIIRX_DATA_VAL(x) ((x) & 0xffff)
-
-/* MII status register */
-#define MIISTATUS_LINKFAIL (1 << 0)
-#define MIISTATUS_BUSY (1 << 1)
-#define MIISTATUS_INVALID (1 << 2)
-
-/* TX buffer descriptor */
-#define TX_BD_CS (1 << 0) /* carrier sense lost */
-#define TX_BD_DF (1 << 1) /* defer indication */
-#define TX_BD_LC (1 << 2) /* late collision */
-#define TX_BD_RL (1 << 3) /* retransmission limit */
-#define TX_BD_RETRY_MASK (0x00f0)
-#define TX_BD_RETRY(x) (((x) & 0x00f0) >> 4)
-#define TX_BD_UR (1 << 8) /* transmitter underrun */
-#define TX_BD_CRC (1 << 11) /* TX CRC enable */
-#define TX_BD_PAD (1 << 12) /* pad enable for short packets */
-#define TX_BD_WRAP (1 << 13)
-#define TX_BD_IRQ (1 << 14) /* interrupt request enable */
-#define TX_BD_READY (1 << 15) /* TX buffer ready */
-#define TX_BD_LEN(x) (((x) & 0xffff) << 16)
-#define TX_BD_LEN_MASK (0xffff << 16)
-
-#define TX_BD_STATS (TX_BD_CS | TX_BD_DF | TX_BD_LC | \
- TX_BD_RL | TX_BD_RETRY_MASK | TX_BD_UR)
-
-/* RX buffer descriptor */
-#define RX_BD_LC (1 << 0) /* late collision */
-#define RX_BD_CRC (1 << 1) /* RX CRC error */
-#define RX_BD_SF (1 << 2) /* short frame */
-#define RX_BD_TL (1 << 3) /* too long */
-#define RX_BD_DN (1 << 4) /* dribble nibble */
-#define RX_BD_IS (1 << 5) /* invalid symbol */
-#define RX_BD_OR (1 << 6) /* receiver overrun */
-#define RX_BD_MISS (1 << 7)
-#define RX_BD_CF (1 << 8) /* control frame */
-#define RX_BD_WRAP (1 << 13)
-#define RX_BD_IRQ (1 << 14) /* interrupt request enable */
-#define RX_BD_EMPTY (1 << 15)
-#define RX_BD_LEN(x) (((x) & 0xffff) << 16)
-
-#define RX_BD_STATS (RX_BD_LC | RX_BD_CRC | RX_BD_SF | RX_BD_TL | \
- RX_BD_DN | RX_BD_IS | RX_BD_OR | RX_BD_MISS)
-
-#define ETHOC_BUFSIZ 1536
-#define ETHOC_ZLEN 64
-#define ETHOC_BD_BASE 0x400
-#define ETHOC_TIMEOUT (HZ / 2)
-#define ETHOC_MII_TIMEOUT (1 + (HZ / 5))
-
-/**
- * struct ethoc - driver-private device structure
- * @iobase: pointer to I/O memory region
- * @membase: pointer to buffer memory region
- * @dma_alloc: dma allocated buffer size
- * @io_region_size: I/O memory region size
- * @num_tx: number of send buffers
- * @cur_tx: last send buffer written
- * @dty_tx: last buffer actually sent
- * @num_rx: number of receive buffers
- * @cur_rx: current receive buffer
- * @vma: pointer to array of virtual memory addresses for buffers
- * @netdev: pointer to network device structure
- * @napi: NAPI structure
- * @msg_enable: device state flags
- * @lock: device lock
- * @phy: attached PHY
- * @mdio: MDIO bus for PHY access
- * @phy_id: address of attached PHY
- */
-struct ethoc {
- void __iomem *iobase;
- void __iomem *membase;
- int dma_alloc;
- resource_size_t io_region_size;
-
- unsigned int num_tx;
- unsigned int cur_tx;
- unsigned int dty_tx;
-
- unsigned int num_rx;
- unsigned int cur_rx;
-
- void** vma;
-
- struct net_device *netdev;
- struct napi_struct napi;
- u32 msg_enable;
-
- spinlock_t lock;
-
- struct phy_device *phy;
- struct mii_bus *mdio;
- s8 phy_id;
-};
-
-/**
- * struct ethoc_bd - buffer descriptor
- * @stat: buffer statistics
- * @addr: physical memory address
- */
-struct ethoc_bd {
- u32 stat;
- u32 addr;
-};
-
-static inline u32 ethoc_read(struct ethoc *dev, loff_t offset)
-{
- return ioread32(dev->iobase + offset);
-}
-
-static inline void ethoc_write(struct ethoc *dev, loff_t offset, u32 data)
-{
- iowrite32(data, dev->iobase + offset);
-}
-
-static inline void ethoc_read_bd(struct ethoc *dev, int index,
- struct ethoc_bd *bd)
-{
- loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd));
- bd->stat = ethoc_read(dev, offset + 0);
- bd->addr = ethoc_read(dev, offset + 4);
-}
-
-static inline void ethoc_write_bd(struct ethoc *dev, int index,
- const struct ethoc_bd *bd)
-{
- loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd));
- ethoc_write(dev, offset + 0, bd->stat);
- ethoc_write(dev, offset + 4, bd->addr);
-}
-
-static inline void ethoc_enable_irq(struct ethoc *dev, u32 mask)
-{
- u32 imask = ethoc_read(dev, INT_MASK);
- imask |= mask;
- ethoc_write(dev, INT_MASK, imask);
-}
-
-static inline void ethoc_disable_irq(struct ethoc *dev, u32 mask)
-{
- u32 imask = ethoc_read(dev, INT_MASK);
- imask &= ~mask;
- ethoc_write(dev, INT_MASK, imask);
-}
-
-static inline void ethoc_ack_irq(struct ethoc *dev, u32 mask)
-{
- ethoc_write(dev, INT_SOURCE, mask);
-}
-
-static inline void ethoc_enable_rx_and_tx(struct ethoc *dev)
-{
- u32 mode = ethoc_read(dev, MODER);
- mode |= MODER_RXEN | MODER_TXEN;
- ethoc_write(dev, MODER, mode);
-}
-
-static inline void ethoc_disable_rx_and_tx(struct ethoc *dev)
-{
- u32 mode = ethoc_read(dev, MODER);
- mode &= ~(MODER_RXEN | MODER_TXEN);
- ethoc_write(dev, MODER, mode);
-}
-
-static int ethoc_init_ring(struct ethoc *dev, unsigned long mem_start)
-{
- struct ethoc_bd bd;
- int i;
- void* vma;
-
- dev->cur_tx = 0;
- dev->dty_tx = 0;
- dev->cur_rx = 0;
-
- ethoc_write(dev, TX_BD_NUM, dev->num_tx);
-
- /* setup transmission buffers */
- bd.addr = mem_start;
- bd.stat = TX_BD_IRQ | TX_BD_CRC;
- vma = dev->membase;
-
- for (i = 0; i < dev->num_tx; i++) {
- if (i == dev->num_tx - 1)
- bd.stat |= TX_BD_WRAP;
-
- ethoc_write_bd(dev, i, &bd);
- bd.addr += ETHOC_BUFSIZ;
-
- dev->vma[i] = vma;
- vma += ETHOC_BUFSIZ;
- }
-
- bd.stat = RX_BD_EMPTY | RX_BD_IRQ;
-
- for (i = 0; i < dev->num_rx; i++) {
- if (i == dev->num_rx - 1)
- bd.stat |= RX_BD_WRAP;
-
- ethoc_write_bd(dev, dev->num_tx + i, &bd);
- bd.addr += ETHOC_BUFSIZ;
-
- dev->vma[dev->num_tx + i] = vma;
- vma += ETHOC_BUFSIZ;
- }
-
- return 0;
-}
-
-static int ethoc_reset(struct ethoc *dev)
-{
- u32 mode;
-
- /* TODO: reset controller? */
-
- ethoc_disable_rx_and_tx(dev);
-
- /* TODO: setup registers */
-
- /* enable FCS generation and automatic padding */
- mode = ethoc_read(dev, MODER);
- mode |= MODER_CRC | MODER_PAD;
- ethoc_write(dev, MODER, mode);
-
- /* set full-duplex mode */
- mode = ethoc_read(dev, MODER);
- mode |= MODER_FULLD;
- ethoc_write(dev, MODER, mode);
- ethoc_write(dev, IPGT, 0x15);
-
- ethoc_ack_irq(dev, INT_MASK_ALL);
- ethoc_enable_irq(dev, INT_MASK_ALL);
- ethoc_enable_rx_and_tx(dev);
- return 0;
-}
-
-static unsigned int ethoc_update_rx_stats(struct ethoc *dev,
- struct ethoc_bd *bd)
-{
- struct net_device *netdev = dev->netdev;
- unsigned int ret = 0;
-
- if (bd->stat & RX_BD_TL) {
- dev_err(&netdev->dev, "RX: frame too long\n");
- netdev->stats.rx_length_errors++;
- ret++;
- }
-
- if (bd->stat & RX_BD_SF) {
- dev_err(&netdev->dev, "RX: frame too short\n");
- netdev->stats.rx_length_errors++;
- ret++;
- }
-
- if (bd->stat & RX_BD_DN) {
- dev_err(&netdev->dev, "RX: dribble nibble\n");
- netdev->stats.rx_frame_errors++;
- }
-
- if (bd->stat & RX_BD_CRC) {
- dev_err(&netdev->dev, "RX: wrong CRC\n");
- netdev->stats.rx_crc_errors++;
- ret++;
- }
-
- if (bd->stat & RX_BD_OR) {
- dev_err(&netdev->dev, "RX: overrun\n");
- netdev->stats.rx_over_errors++;
- ret++;
- }
-
- if (bd->stat & RX_BD_MISS)
- netdev->stats.rx_missed_errors++;
-
- if (bd->stat & RX_BD_LC) {
- dev_err(&netdev->dev, "RX: late collision\n");
- netdev->stats.collisions++;
- ret++;
- }
-
- return ret;
-}
-
-static int ethoc_rx(struct net_device *dev, int limit)
-{
- struct ethoc *priv = netdev_priv(dev);
- int count;
-
- for (count = 0; count < limit; ++count) {
- unsigned int entry;
- struct ethoc_bd bd;
-
- entry = priv->num_tx + priv->cur_rx;
- ethoc_read_bd(priv, entry, &bd);
- if (bd.stat & RX_BD_EMPTY) {
- ethoc_ack_irq(priv, INT_MASK_RX);
- /* If packet (interrupt) came in between checking
- * BD_EMTPY and clearing the interrupt source, then we
- * risk missing the packet as the RX interrupt won't
- * trigger right away when we reenable it; hence, check
- * BD_EMTPY here again to make sure there isn't such a
- * packet waiting for us...
- */
- ethoc_read_bd(priv, entry, &bd);
- if (bd.stat & RX_BD_EMPTY)
- break;
- }
-
- if (ethoc_update_rx_stats(priv, &bd) == 0) {
- int size = bd.stat >> 16;
- struct sk_buff *skb;
-
- size -= 4; /* strip the CRC */
- skb = netdev_alloc_skb_ip_align(dev, size);
-
- if (likely(skb)) {
- void *src = priv->vma[entry];
- memcpy_fromio(skb_put(skb, size), src, size);
- skb->protocol = eth_type_trans(skb, dev);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += size;
- netif_receive_skb(skb);
- } else {
- if (net_ratelimit())
- dev_warn(&dev->dev, "low on memory - "
- "packet dropped\n");
-
- dev->stats.rx_dropped++;
- break;
- }
- }
-
- /* clear the buffer descriptor so it can be reused */
- bd.stat &= ~RX_BD_STATS;
- bd.stat |= RX_BD_EMPTY;
- ethoc_write_bd(priv, entry, &bd);
- if (++priv->cur_rx == priv->num_rx)
- priv->cur_rx = 0;
- }
-
- return count;
-}
-
-static void ethoc_update_tx_stats(struct ethoc *dev, struct ethoc_bd *bd)
-{
- struct net_device *netdev = dev->netdev;
-
- if (bd->stat & TX_BD_LC) {
- dev_err(&netdev->dev, "TX: late collision\n");
- netdev->stats.tx_window_errors++;
- }
-
- if (bd->stat & TX_BD_RL) {
- dev_err(&netdev->dev, "TX: retransmit limit\n");
- netdev->stats.tx_aborted_errors++;
- }
-
- if (bd->stat & TX_BD_UR) {
- dev_err(&netdev->dev, "TX: underrun\n");
- netdev->stats.tx_fifo_errors++;
- }
-
- if (bd->stat & TX_BD_CS) {
- dev_err(&netdev->dev, "TX: carrier sense lost\n");
- netdev->stats.tx_carrier_errors++;
- }
-
- if (bd->stat & TX_BD_STATS)
- netdev->stats.tx_errors++;
-
- netdev->stats.collisions += (bd->stat >> 4) & 0xf;
- netdev->stats.tx_bytes += bd->stat >> 16;
- netdev->stats.tx_packets++;
-}
-
-static int ethoc_tx(struct net_device *dev, int limit)
-{
- struct ethoc *priv = netdev_priv(dev);
- int count;
- struct ethoc_bd bd;
-
- for (count = 0; count < limit; ++count) {
- unsigned int entry;
-
- entry = priv->dty_tx & (priv->num_tx-1);
-
- ethoc_read_bd(priv, entry, &bd);
-
- if (bd.stat & TX_BD_READY || (priv->dty_tx == priv->cur_tx)) {
- ethoc_ack_irq(priv, INT_MASK_TX);
- /* If interrupt came in between reading in the BD
- * and clearing the interrupt source, then we risk
- * missing the event as the TX interrupt won't trigger
- * right away when we reenable it; hence, check
- * BD_EMPTY here again to make sure there isn't such an
- * event pending...
- */
- ethoc_read_bd(priv, entry, &bd);
- if (bd.stat & TX_BD_READY ||
- (priv->dty_tx == priv->cur_tx))
- break;
- }
-
- ethoc_update_tx_stats(priv, &bd);
- priv->dty_tx++;
- }
-
- if ((priv->cur_tx - priv->dty_tx) <= (priv->num_tx / 2))
- netif_wake_queue(dev);
-
- return count;
-}
-
-static irqreturn_t ethoc_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct ethoc *priv = netdev_priv(dev);
- u32 pending;
- u32 mask;
-
- /* Figure out what triggered the interrupt...
- * The tricky bit here is that the interrupt source bits get
- * set in INT_SOURCE for an event regardless of whether that
- * event is masked or not. Thus, in order to figure out what
- * triggered the interrupt, we need to remove the sources
- * for all events that are currently masked. This behaviour
- * is not particularly well documented but reasonable...
- */
- mask = ethoc_read(priv, INT_MASK);
- pending = ethoc_read(priv, INT_SOURCE);
- pending &= mask;
-
- if (unlikely(pending == 0)) {
- return IRQ_NONE;
- }
-
- ethoc_ack_irq(priv, pending);
-
- /* We always handle the dropped packet interrupt */
- if (pending & INT_MASK_BUSY) {
- dev_err(&dev->dev, "packet dropped\n");
- dev->stats.rx_dropped++;
- }
-
- /* Handle receive/transmit event by switching to polling */
- if (pending & (INT_MASK_TX | INT_MASK_RX)) {
- ethoc_disable_irq(priv, INT_MASK_TX | INT_MASK_RX);
- napi_schedule(&priv->napi);
- }
-
- return IRQ_HANDLED;
-}
-
-static int ethoc_get_mac_address(struct net_device *dev, void *addr)
-{
- struct ethoc *priv = netdev_priv(dev);
- u8 *mac = (u8 *)addr;
- u32 reg;
-
- reg = ethoc_read(priv, MAC_ADDR0);
- mac[2] = (reg >> 24) & 0xff;
- mac[3] = (reg >> 16) & 0xff;
- mac[4] = (reg >> 8) & 0xff;
- mac[5] = (reg >> 0) & 0xff;
-
- reg = ethoc_read(priv, MAC_ADDR1);
- mac[0] = (reg >> 8) & 0xff;
- mac[1] = (reg >> 0) & 0xff;
-
- return 0;
-}
-
-static int ethoc_poll(struct napi_struct *napi, int budget)
-{
- struct ethoc *priv = container_of(napi, struct ethoc, napi);
- int rx_work_done = 0;
- int tx_work_done = 0;
-
- rx_work_done = ethoc_rx(priv->netdev, budget);
- tx_work_done = ethoc_tx(priv->netdev, budget);
-
- if (rx_work_done < budget && tx_work_done < budget) {
- napi_complete(napi);
- ethoc_enable_irq(priv, INT_MASK_TX | INT_MASK_RX);
- }
-
- return rx_work_done;
-}
-
-static int ethoc_mdio_read(struct mii_bus *bus, int phy, int reg)
-{
- struct ethoc *priv = bus->priv;
- int i;
-
- ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg));
- ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ);
-
- for (i=0; i < 5; i++) {
- u32 status = ethoc_read(priv, MIISTATUS);
- if (!(status & MIISTATUS_BUSY)) {
- u32 data = ethoc_read(priv, MIIRX_DATA);
- /* reset MII command register */
- ethoc_write(priv, MIICOMMAND, 0);
- return data;
- }
- usleep_range(100,200);
- }
-
- return -EBUSY;
-}
-
-static int ethoc_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
-{
- struct ethoc *priv = bus->priv;
- int i;
-
- ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg));
- ethoc_write(priv, MIITX_DATA, val);
- ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE);
-
- for (i=0; i < 5; i++) {
- u32 stat = ethoc_read(priv, MIISTATUS);
- if (!(stat & MIISTATUS_BUSY)) {
- /* reset MII command register */
- ethoc_write(priv, MIICOMMAND, 0);
- return 0;
- }
- usleep_range(100,200);
- }
-
- return -EBUSY;
-}
-
-static int ethoc_mdio_reset(struct mii_bus *bus)
-{
- return 0;
-}
-
-static void ethoc_mdio_poll(struct net_device *dev)
-{
-}
-
-static int __devinit ethoc_mdio_probe(struct net_device *dev)
-{
- struct ethoc *priv = netdev_priv(dev);
- struct phy_device *phy;
- int err;
-
- if (priv->phy_id != -1) {
- phy = priv->mdio->phy_map[priv->phy_id];
- } else {
- phy = phy_find_first(priv->mdio);
- }
-
- if (!phy) {
- dev_err(&dev->dev, "no PHY found\n");
- return -ENXIO;
- }
-
- err = phy_connect_direct(dev, phy, ethoc_mdio_poll, 0,
- PHY_INTERFACE_MODE_GMII);
- if (err) {
- dev_err(&dev->dev, "could not attach to PHY\n");
- return err;
- }
-
- priv->phy = phy;
- return 0;
-}
-
-static int ethoc_open(struct net_device *dev)
-{
- struct ethoc *priv = netdev_priv(dev);
- int ret;
-
- ret = request_irq(dev->irq, ethoc_interrupt, IRQF_SHARED,
- dev->name, dev);
- if (ret)
- return ret;
-
- ethoc_init_ring(priv, dev->mem_start);
- ethoc_reset(priv);
-
- if (netif_queue_stopped(dev)) {
- dev_dbg(&dev->dev, " resuming queue\n");
- netif_wake_queue(dev);
- } else {
- dev_dbg(&dev->dev, " starting queue\n");
- netif_start_queue(dev);
- }
-
- phy_start(priv->phy);
- napi_enable(&priv->napi);
-
- if (netif_msg_ifup(priv)) {
- dev_info(&dev->dev, "I/O: %08lx Memory: %08lx-%08lx\n",
- dev->base_addr, dev->mem_start, dev->mem_end);
- }
-
- return 0;
-}
-
-static int ethoc_stop(struct net_device *dev)
-{
- struct ethoc *priv = netdev_priv(dev);
-
- napi_disable(&priv->napi);
-
- if (priv->phy)
- phy_stop(priv->phy);
-
- ethoc_disable_rx_and_tx(priv);
- free_irq(dev->irq, dev);
-
- if (!netif_queue_stopped(dev))
- netif_stop_queue(dev);
-
- return 0;
-}
-
-static int ethoc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
- struct ethoc *priv = netdev_priv(dev);
- struct mii_ioctl_data *mdio = if_mii(ifr);
- struct phy_device *phy = NULL;
-
- if (!netif_running(dev))
- return -EINVAL;
-
- if (cmd != SIOCGMIIPHY) {
- if (mdio->phy_id >= PHY_MAX_ADDR)
- return -ERANGE;
-
- phy = priv->mdio->phy_map[mdio->phy_id];
- if (!phy)
- return -ENODEV;
- } else {
- phy = priv->phy;
- }
-
- return phy_mii_ioctl(phy, ifr, cmd);
-}
-
-static int ethoc_config(struct net_device *dev, struct ifmap *map)
-{
- return -ENOSYS;
-}
-
-static int ethoc_set_mac_address(struct net_device *dev, void *addr)
-{
- struct ethoc *priv = netdev_priv(dev);
- u8 *mac = (u8 *)addr;
-
- ethoc_write(priv, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) |
- (mac[4] << 8) | (mac[5] << 0));
- ethoc_write(priv, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0));
-
- return 0;
-}
-
-static void ethoc_set_multicast_list(struct net_device *dev)
-{
- struct ethoc *priv = netdev_priv(dev);
- u32 mode = ethoc_read(priv, MODER);
- struct netdev_hw_addr *ha;
- u32 hash[2] = { 0, 0 };
-
- /* set loopback mode if requested */
- if (dev->flags & IFF_LOOPBACK)
- mode |= MODER_LOOP;
- else
- mode &= ~MODER_LOOP;
-
- /* receive broadcast frames if requested */
- if (dev->flags & IFF_BROADCAST)
- mode &= ~MODER_BRO;
- else
- mode |= MODER_BRO;
-
- /* enable promiscuous mode if requested */
- if (dev->flags & IFF_PROMISC)
- mode |= MODER_PRO;
- else
- mode &= ~MODER_PRO;
-
- ethoc_write(priv, MODER, mode);
-
- /* receive multicast frames */
- if (dev->flags & IFF_ALLMULTI) {
- hash[0] = 0xffffffff;
- hash[1] = 0xffffffff;
- } else {
- netdev_for_each_mc_addr(ha, dev) {
- u32 crc = ether_crc(ETH_ALEN, ha->addr);
- int bit = (crc >> 26) & 0x3f;
- hash[bit >> 5] |= 1 << (bit & 0x1f);
- }
- }
-
- ethoc_write(priv, ETH_HASH0, hash[0]);
- ethoc_write(priv, ETH_HASH1, hash[1]);
-}
-
-static int ethoc_change_mtu(struct net_device *dev, int new_mtu)
-{
- return -ENOSYS;
-}
-
-static void ethoc_tx_timeout(struct net_device *dev)
-{
- struct ethoc *priv = netdev_priv(dev);
- u32 pending = ethoc_read(priv, INT_SOURCE);
- if (likely(pending))
- ethoc_interrupt(dev->irq, dev);
-}
-
-static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct ethoc *priv = netdev_priv(dev);
- struct ethoc_bd bd;
- unsigned int entry;
- void *dest;
-
- if (unlikely(skb->len > ETHOC_BUFSIZ)) {
- dev->stats.tx_errors++;
- goto out;
- }
-
- entry = priv->cur_tx % priv->num_tx;
- spin_lock_irq(&priv->lock);
- priv->cur_tx++;
-
- ethoc_read_bd(priv, entry, &bd);
- if (unlikely(skb->len < ETHOC_ZLEN))
- bd.stat |= TX_BD_PAD;
- else
- bd.stat &= ~TX_BD_PAD;
-
- dest = priv->vma[entry];
- memcpy_toio(dest, skb->data, skb->len);
-
- bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK);
- bd.stat |= TX_BD_LEN(skb->len);
- ethoc_write_bd(priv, entry, &bd);
-
- bd.stat |= TX_BD_READY;
- ethoc_write_bd(priv, entry, &bd);
-
- if (priv->cur_tx == (priv->dty_tx + priv->num_tx)) {
- dev_dbg(&dev->dev, "stopping queue\n");
- netif_stop_queue(dev);
- }
-
- spin_unlock_irq(&priv->lock);
- skb_tx_timestamp(skb);
-out:
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
-}
-
-static const struct net_device_ops ethoc_netdev_ops = {
- .ndo_open = ethoc_open,
- .ndo_stop = ethoc_stop,
- .ndo_do_ioctl = ethoc_ioctl,
- .ndo_set_config = ethoc_config,
- .ndo_set_mac_address = ethoc_set_mac_address,
- .ndo_set_multicast_list = ethoc_set_multicast_list,
- .ndo_change_mtu = ethoc_change_mtu,
- .ndo_tx_timeout = ethoc_tx_timeout,
- .ndo_start_xmit = ethoc_start_xmit,
-};
-
-/**
- * ethoc_probe() - initialize OpenCores ethernet MAC
- * pdev: platform device
- */
-static int __devinit ethoc_probe(struct platform_device *pdev)
-{
- struct net_device *netdev = NULL;
- struct resource *res = NULL;
- struct resource *mmio = NULL;
- struct resource *mem = NULL;
- struct ethoc *priv = NULL;
- unsigned int phy;
- int num_bd;
- int ret = 0;
-
- /* allocate networking device */
- netdev = alloc_etherdev(sizeof(struct ethoc));
- if (!netdev) {
- dev_err(&pdev->dev, "cannot allocate network device\n");
- ret = -ENOMEM;
- goto out;
- }
-
- SET_NETDEV_DEV(netdev, &pdev->dev);
- platform_set_drvdata(pdev, netdev);
-
- /* obtain I/O memory space */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "cannot obtain I/O memory space\n");
- ret = -ENXIO;
- goto free;
- }
-
- mmio = devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), res->name);
- if (!mmio) {
- dev_err(&pdev->dev, "cannot request I/O memory space\n");
- ret = -ENXIO;
- goto free;
- }
-
- netdev->base_addr = mmio->start;
-
- /* obtain buffer memory space */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (res) {
- mem = devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), res->name);
- if (!mem) {
- dev_err(&pdev->dev, "cannot request memory space\n");
- ret = -ENXIO;
- goto free;
- }
-
- netdev->mem_start = mem->start;
- netdev->mem_end = mem->end;
- }
-
-
- /* obtain device IRQ number */
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res) {
- dev_err(&pdev->dev, "cannot obtain IRQ\n");
- ret = -ENXIO;
- goto free;
- }
-
- netdev->irq = res->start;
-
- /* setup driver-private data */
- priv = netdev_priv(netdev);
- priv->netdev = netdev;
- priv->dma_alloc = 0;
- priv->io_region_size = resource_size(mmio);
-
- priv->iobase = devm_ioremap_nocache(&pdev->dev, netdev->base_addr,
- resource_size(mmio));
- if (!priv->iobase) {
- dev_err(&pdev->dev, "cannot remap I/O memory space\n");
- ret = -ENXIO;
- goto error;
- }
-
- if (netdev->mem_end) {
- priv->membase = devm_ioremap_nocache(&pdev->dev,
- netdev->mem_start, resource_size(mem));
- if (!priv->membase) {
- dev_err(&pdev->dev, "cannot remap memory space\n");
- ret = -ENXIO;
- goto error;
- }
- } else {
- /* Allocate buffer memory */
- priv->membase = dmam_alloc_coherent(&pdev->dev,
- buffer_size, (void *)&netdev->mem_start,
- GFP_KERNEL);
- if (!priv->membase) {
- dev_err(&pdev->dev, "cannot allocate %dB buffer\n",
- buffer_size);
- ret = -ENOMEM;
- goto error;
- }
- netdev->mem_end = netdev->mem_start + buffer_size;
- priv->dma_alloc = buffer_size;
- }
-
- /* calculate the number of TX/RX buffers, maximum 128 supported */
- num_bd = min_t(unsigned int,
- 128, (netdev->mem_end - netdev->mem_start + 1) / ETHOC_BUFSIZ);
- if (num_bd < 4) {
- ret = -ENODEV;
- goto error;
- }
- /* num_tx must be a power of two */
- priv->num_tx = rounddown_pow_of_two(num_bd >> 1);
- priv->num_rx = num_bd - priv->num_tx;
-
- dev_dbg(&pdev->dev, "ethoc: num_tx: %d num_rx: %d\n",
- priv->num_tx, priv->num_rx);
-
- priv->vma = devm_kzalloc(&pdev->dev, num_bd*sizeof(void*), GFP_KERNEL);
- if (!priv->vma) {
- ret = -ENOMEM;
- goto error;
- }
-
- /* Allow the platform setup code to pass in a MAC address. */
- if (pdev->dev.platform_data) {
- struct ethoc_platform_data *pdata = pdev->dev.platform_data;
- memcpy(netdev->dev_addr, pdata->hwaddr, IFHWADDRLEN);
- priv->phy_id = pdata->phy_id;
- } else {
- priv->phy_id = -1;
-
-#ifdef CONFIG_OF
- {
- const uint8_t* mac;
-
- mac = of_get_property(pdev->dev.of_node,
- "local-mac-address",
- NULL);
- if (mac)
- memcpy(netdev->dev_addr, mac, IFHWADDRLEN);
- }
-#endif
- }
-
- /* Check that the given MAC address is valid. If it isn't, read the
- * current MAC from the controller. */
- if (!is_valid_ether_addr(netdev->dev_addr))
- ethoc_get_mac_address(netdev, netdev->dev_addr);
-
- /* Check the MAC again for validity, if it still isn't choose and
- * program a random one. */
- if (!is_valid_ether_addr(netdev->dev_addr))
- random_ether_addr(netdev->dev_addr);
-
- ethoc_set_mac_address(netdev, netdev->dev_addr);
-
- /* register MII bus */
- priv->mdio = mdiobus_alloc();
- if (!priv->mdio) {
- ret = -ENOMEM;
- goto free;
- }
-
- priv->mdio->name = "ethoc-mdio";
- snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%d",
- priv->mdio->name, pdev->id);
- priv->mdio->read = ethoc_mdio_read;
- priv->mdio->write = ethoc_mdio_write;
- priv->mdio->reset = ethoc_mdio_reset;
- priv->mdio->priv = priv;
-
- priv->mdio->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
- if (!priv->mdio->irq) {
- ret = -ENOMEM;
- goto free_mdio;
- }
-
- for (phy = 0; phy < PHY_MAX_ADDR; phy++)
- priv->mdio->irq[phy] = PHY_POLL;
-
- ret = mdiobus_register(priv->mdio);
- if (ret) {
- dev_err(&netdev->dev, "failed to register MDIO bus\n");
- goto free_mdio;
- }
-
- ret = ethoc_mdio_probe(netdev);
- if (ret) {
- dev_err(&netdev->dev, "failed to probe MDIO bus\n");
- goto error;
- }
-
- ether_setup(netdev);
-
- /* setup the net_device structure */
- netdev->netdev_ops = ðoc_netdev_ops;
- netdev->watchdog_timeo = ETHOC_TIMEOUT;
- netdev->features |= 0;
-
- /* setup NAPI */
- netif_napi_add(netdev, &priv->napi, ethoc_poll, 64);
-
- spin_lock_init(&priv->lock);
-
- ret = register_netdev(netdev);
- if (ret < 0) {
- dev_err(&netdev->dev, "failed to register interface\n");
- goto error2;
- }
-
- goto out;
-
-error2:
- netif_napi_del(&priv->napi);
-error:
- mdiobus_unregister(priv->mdio);
-free_mdio:
- kfree(priv->mdio->irq);
- mdiobus_free(priv->mdio);
-free:
- free_netdev(netdev);
-out:
- return ret;
-}
-
-/**
- * ethoc_remove() - shutdown OpenCores ethernet MAC
- * @pdev: platform device
- */
-static int __devexit ethoc_remove(struct platform_device *pdev)
-{
- struct net_device *netdev = platform_get_drvdata(pdev);
- struct ethoc *priv = netdev_priv(netdev);
-
- platform_set_drvdata(pdev, NULL);
-
- if (netdev) {
- netif_napi_del(&priv->napi);
- phy_disconnect(priv->phy);
- priv->phy = NULL;
-
- if (priv->mdio) {
- mdiobus_unregister(priv->mdio);
- kfree(priv->mdio->irq);
- mdiobus_free(priv->mdio);
- }
- unregister_netdev(netdev);
- free_netdev(netdev);
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int ethoc_suspend(struct platform_device *pdev, pm_message_t state)
-{
- return -ENOSYS;
-}
-
-static int ethoc_resume(struct platform_device *pdev)
-{
- return -ENOSYS;
-}
-#else
-# define ethoc_suspend NULL
-# define ethoc_resume NULL
-#endif
-
-static struct of_device_id ethoc_match[] = {
- { .compatible = "opencores,ethoc", },
- {},
-};
-MODULE_DEVICE_TABLE(of, ethoc_match);
-
-static struct platform_driver ethoc_driver = {
- .probe = ethoc_probe,
- .remove = __devexit_p(ethoc_remove),
- .suspend = ethoc_suspend,
- .resume = ethoc_resume,
- .driver = {
- .name = "ethoc",
- .owner = THIS_MODULE,
- .of_match_table = ethoc_match,
- },
-};
-
-static int __init ethoc_init(void)
-{
- return platform_driver_register(ðoc_driver);
-}
-
-static void __exit ethoc_exit(void)
-{
- platform_driver_unregister(ðoc_driver);
-}
-
-module_init(ethoc_init);
-module_exit(ethoc_exit);
-
-MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
-MODULE_DESCRIPTION("OpenCores Ethernet MAC driver");
-MODULE_LICENSE("GPL v2");
-
projects / firefly-linux-kernel-4.4.55.git / commitdiff