--- /dev/null
+/*
+ * Dave DNET Ethernet Controller driver
+ *
+ * Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
+ * Copyright (C) 2009 Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
+ *
+ * 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.
+ */
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+
+#include "dnet.h"
+
+#undef DEBUG
+
+/* function for reading internal MAC register */
+static u16 dnet_readw_mac(struct dnet *bp, u16 reg)
+{
+ u16 data_read;
+
+ /* issue a read */
+ dnet_writel(bp, reg, MACREG_ADDR);
+
+ /* since a read/write op to the MAC is very slow,
+ * we must wait before reading the data */
+ ndelay(500);
+
+ /* read data read from the MAC register */
+ data_read = dnet_readl(bp, MACREG_DATA);
+
+ /* all done */
+ return data_read;
+}
+
+/* function for writing internal MAC register */
+static void dnet_writew_mac(struct dnet *bp, u16 reg, u16 val)
+{
+ /* load data to write */
+ dnet_writel(bp, val, MACREG_DATA);
+
+ /* issue a write */
+ dnet_writel(bp, reg | DNET_INTERNAL_WRITE, MACREG_ADDR);
+
+ /* since a read/write op to the MAC is very slow,
+ * we must wait before exiting */
+ ndelay(500);
+}
+
+static void __dnet_set_hwaddr(struct dnet *bp)
+{
+ u16 tmp;
+
+ tmp = be16_to_cpup((__be16 *)bp->dev->dev_addr);
+ dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG, tmp);
+ tmp = be16_to_cpup((__be16 *)(bp->dev->dev_addr + 2));
+ dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG, tmp);
+ tmp = be16_to_cpup((__be16 *)(bp->dev->dev_addr + 4));
+ dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG, tmp);
+}
+
+static void dnet_get_hwaddr(struct dnet *bp)
+{
+ u16 tmp;
+ u8 addr[6];
+
+ /*
+ * from MAC docs:
+ * "Note that the MAC address is stored in the registers in Hexadecimal
+ * form. For example, to set the MAC Address to: AC-DE-48-00-00-80
+ * would require writing 0xAC (octet 0) to address 0x0B (high byte of
+ * Mac_addr[15:0]), 0xDE (octet 1) to address 0x0A (Low byte of
+ * Mac_addr[15:0]), 0x48 (octet 2) to address 0x0D (high byte of
+ * Mac_addr[15:0]), 0x00 (octet 3) to address 0x0C (Low byte of
+ * Mac_addr[15:0]), 0x00 (octet 4) to address 0x0F (high byte of
+ * Mac_addr[15:0]), and 0x80 (octet 5) to address * 0x0E (Low byte of
+ * Mac_addr[15:0]).
+ */
+ tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG);
+ *((__be16 *)addr) = cpu_to_be16(tmp);
+ tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG);
+ *((__be16 *)(addr + 2)) = cpu_to_be16(tmp);
+ tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG);
+ *((__be16 *)(addr + 4)) = cpu_to_be16(tmp);
+
+ if (is_valid_ether_addr(addr))
+ memcpy(bp->dev->dev_addr, addr, sizeof(addr));
+}
+
+static int dnet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+ struct dnet *bp = bus->priv;
+ u16 value;
+
+ while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
+ & DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ cpu_relax();
+
+ /* only 5 bits allowed for phy-addr and reg_offset */
+ mii_id &= 0x1f;
+ regnum &= 0x1f;
+
+ /* prepare reg_value for a read */
+ value = (mii_id << 8);
+ value |= regnum;
+
+ /* write control word */
+ dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG, value);
+
+ /* wait for end of transfer */
+ while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
+ & DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ cpu_relax();
+
+ value = dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_DAT_REG);
+
+ pr_debug("mdio_read %02x:%02x <- %04x\n", mii_id, regnum, value);
+
+ return value;
+}
+
+static int dnet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
+ u16 value)
+{
+ struct dnet *bp = bus->priv;
+ u16 tmp;
+
+ pr_debug("mdio_write %02x:%02x <- %04x\n", mii_id, regnum, value);
+
+ while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
+ & DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ cpu_relax();
+
+ /* prepare for a write operation */
+ tmp = (1 << 13);
+
+ /* only 5 bits allowed for phy-addr and reg_offset */
+ mii_id &= 0x1f;
+ regnum &= 0x1f;
+
+ /* only 16 bits on data */
+ value &= 0xffff;
+
+ /* prepare reg_value for a write */
+ tmp |= (mii_id << 8);
+ tmp |= regnum;
+
+ /* write data to write first */
+ dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_DAT_REG, value);
+
+ /* write control word */
+ dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG, tmp);
+
+ while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
+ & DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ cpu_relax();
+
+ return 0;
+}
+
+static void dnet_handle_link_change(struct net_device *dev)
+{
+ struct dnet *bp = netdev_priv(dev);
+ struct phy_device *phydev = bp->phy_dev;
+ unsigned long flags;
+ u32 mode_reg, ctl_reg;
+
+ int status_change = 0;
+
+ spin_lock_irqsave(&bp->lock, flags);
+
+ mode_reg = dnet_readw_mac(bp, DNET_INTERNAL_MODE_REG);
+ ctl_reg = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG);
+
+ if (phydev->link) {
+ if (bp->duplex != phydev->duplex) {
+ if (phydev->duplex)
+ ctl_reg &=
+ ~(DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP);
+ else
+ ctl_reg |=
+ DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP;
+
+ bp->duplex = phydev->duplex;
+ status_change = 1;
+ }
+
+ if (bp->speed != phydev->speed) {
+ status_change = 1;
+ switch (phydev->speed) {
+ case 1000:
+ mode_reg |= DNET_INTERNAL_MODE_GBITEN;
+ break;
+ case 100:
+ case 10:
+ mode_reg &= ~DNET_INTERNAL_MODE_GBITEN;
+ break;
+ default:
+ printk(KERN_WARNING
+ "%s: Ack! Speed (%d) is not "
+ "10/100/1000!\n", dev->name,
+ phydev->speed);
+ break;
+ }
+ bp->speed = phydev->speed;
+ }
+ }
+
+ if (phydev->link != bp->link) {
+ if (phydev->link) {
+ mode_reg |=
+ (DNET_INTERNAL_MODE_RXEN | DNET_INTERNAL_MODE_TXEN);
+ } else {
+ mode_reg &=
+ ~(DNET_INTERNAL_MODE_RXEN |
+ DNET_INTERNAL_MODE_TXEN);
+ bp->speed = 0;
+ bp->duplex = -1;
+ }
+ bp->link = phydev->link;
+
+ status_change = 1;
+ }
+
+ if (status_change) {
+ dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, ctl_reg);
+ dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, mode_reg);
+ }
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ if (status_change) {
+ if (phydev->link)
+ printk(KERN_INFO "%s: link up (%d/%s)\n",
+ dev->name, phydev->speed,
+ DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
+ else
+ printk(KERN_INFO "%s: link down\n", dev->name);
+ }
+}
+
+static int dnet_mii_probe(struct net_device *dev)
+{
+ struct dnet *bp = netdev_priv(dev);
+ struct phy_device *phydev = NULL;
+ int phy_addr;
+
+ /* find the first phy */
+ for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
+ if (bp->mii_bus->phy_map[phy_addr]) {
+ phydev = bp->mii_bus->phy_map[phy_addr];
+ break;
+ }
+ }
+
+ if (!phydev) {
+ printk(KERN_ERR "%s: no PHY found\n", dev->name);
+ return -ENODEV;
+ }
+
+ /* TODO : add pin_irq */
+
+ /* attach the mac to the phy */
+ if (bp->capabilities & DNET_HAS_RMII) {
+ phydev = phy_connect(dev, dev_name(&phydev->dev),
+ &dnet_handle_link_change,
+ PHY_INTERFACE_MODE_RMII);
+ } else {
+ phydev = phy_connect(dev, dev_name(&phydev->dev),
+ &dnet_handle_link_change,
+ PHY_INTERFACE_MODE_MII);
+ }
+
+ if (IS_ERR(phydev)) {
+ printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
+ return PTR_ERR(phydev);
+ }
+
+ /* mask with MAC supported features */
+ if (bp->capabilities & DNET_HAS_GIGABIT)
+ phydev->supported &= PHY_GBIT_FEATURES;
+ else
+ phydev->supported &= PHY_BASIC_FEATURES;
+
+ phydev->supported |= SUPPORTED_Asym_Pause | SUPPORTED_Pause;
+
+ phydev->advertising = phydev->supported;
+
+ bp->link = 0;
+ bp->speed = 0;
+ bp->duplex = -1;
+ bp->phy_dev = phydev;
+
+ return 0;
+}
+
+static int dnet_mii_init(struct dnet *bp)
+{
+ int err, i;
+
+ bp->mii_bus = mdiobus_alloc();
+ if (bp->mii_bus == NULL)
+ return -ENOMEM;
+
+ bp->mii_bus->name = "dnet_mii_bus";
+ bp->mii_bus->read = &dnet_mdio_read;
+ bp->mii_bus->write = &dnet_mdio_write;
+
+ snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
+ bp->pdev->name, bp->pdev->id);
+
+ bp->mii_bus->priv = bp;
+
+ bp->mii_bus->irq = devm_kmalloc(&bp->pdev->dev,
+ sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+ if (!bp->mii_bus->irq) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ bp->mii_bus->irq[i] = PHY_POLL;
+
+ if (mdiobus_register(bp->mii_bus)) {
+ err = -ENXIO;
+ goto err_out;
+ }
+
+ if (dnet_mii_probe(bp->dev) != 0) {
+ err = -ENXIO;
+ goto err_out_unregister_bus;
+ }
+
+ return 0;
+
+err_out_unregister_bus:
+ mdiobus_unregister(bp->mii_bus);
+err_out:
+ mdiobus_free(bp->mii_bus);
+ return err;
+}
+
+/* For Neptune board: LINK1000 as Link LED and TX as activity LED */
+static int dnet_phy_marvell_fixup(struct phy_device *phydev)
+{
+ return phy_write(phydev, 0x18, 0x4148);
+}
+
+static void dnet_update_stats(struct dnet *bp)
+{
+ u32 __iomem *reg = bp->regs + DNET_RX_PKT_IGNR_CNT;
+ u32 *p = &bp->hw_stats.rx_pkt_ignr;
+ u32 *end = &bp->hw_stats.rx_byte + 1;
+
+ WARN_ON((unsigned long)(end - p - 1) !=
+ (DNET_RX_BYTE_CNT - DNET_RX_PKT_IGNR_CNT) / 4);
+
+ for (; p < end; p++, reg++)
+ *p += readl(reg);
+
+ reg = bp->regs + DNET_TX_UNICAST_CNT;
+ p = &bp->hw_stats.tx_unicast;
+ end = &bp->hw_stats.tx_byte + 1;
+
+ WARN_ON((unsigned long)(end - p - 1) !=
+ (DNET_TX_BYTE_CNT - DNET_TX_UNICAST_CNT) / 4);
+
+ for (; p < end; p++, reg++)
+ *p += readl(reg);
+}
+
+static int dnet_poll(struct napi_struct *napi, int budget)
+{
+ struct dnet *bp = container_of(napi, struct dnet, napi);
+ struct net_device *dev = bp->dev;
+ int npackets = 0;
+ unsigned int pkt_len;
+ struct sk_buff *skb;
+ unsigned int *data_ptr;
+ u32 int_enable;
+ u32 cmd_word;
+ int i;
+
+ while (npackets < budget) {
+ /*
+ * break out of while loop if there are no more
+ * packets waiting
+ */
+ if (!(dnet_readl(bp, RX_FIFO_WCNT) >> 16))
+ break;
+
+ cmd_word = dnet_readl(bp, RX_LEN_FIFO);
+ pkt_len = cmd_word & 0xFFFF;
+
+ if (cmd_word & 0xDF180000)
+ printk(KERN_ERR "%s packet receive error %x\n",
+ __func__, cmd_word);
+
+ skb = netdev_alloc_skb(dev, pkt_len + 5);
+ if (skb != NULL) {
+ /* Align IP on 16 byte boundaries */
+ skb_reserve(skb, 2);
+ /*
+ * 'skb_put()' points to the start of sk_buff
+ * data area.
+ */
+ data_ptr = (unsigned int *)skb_put(skb, pkt_len);
+ for (i = 0; i < (pkt_len + 3) >> 2; i++)
+ *data_ptr++ = dnet_readl(bp, RX_DATA_FIFO);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_receive_skb(skb);
+ npackets++;
+ } else
+ printk(KERN_NOTICE
+ "%s: No memory to allocate a sk_buff of "
+ "size %u.\n", dev->name, pkt_len);
+ }
+
+ if (npackets < budget) {
+ /* We processed all packets available. Tell NAPI it can
+ * stop polling then re-enable rx interrupts.
+ */
+ napi_complete(napi);
+ int_enable = dnet_readl(bp, INTR_ENB);
+ int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
+ dnet_writel(bp, int_enable, INTR_ENB);
+ }
+
+ return npackets;
+}
+
+static irqreturn_t dnet_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct dnet *bp = netdev_priv(dev);
+ u32 int_src, int_enable, int_current;
+ unsigned long flags;
+ unsigned int handled = 0;
+
+ spin_lock_irqsave(&bp->lock, flags);
+
+ /* read and clear the DNET irq (clear on read) */
+ int_src = dnet_readl(bp, INTR_SRC);
+ int_enable = dnet_readl(bp, INTR_ENB);
+ int_current = int_src & int_enable;
+
+ /* restart the queue if we had stopped it for TX fifo almost full */
+ if (int_current & DNET_INTR_SRC_TX_FIFOAE) {
+ int_enable = dnet_readl(bp, INTR_ENB);
+ int_enable &= ~DNET_INTR_ENB_TX_FIFOAE;
+ dnet_writel(bp, int_enable, INTR_ENB);
+ netif_wake_queue(dev);
+ handled = 1;
+ }
+
+ /* RX FIFO error checking */
+ if (int_current &
+ (DNET_INTR_SRC_RX_CMDFIFOFF | DNET_INTR_SRC_RX_DATAFIFOFF)) {
+ printk(KERN_ERR "%s: RX fifo error %x, irq %x\n", __func__,
+ dnet_readl(bp, RX_STATUS), int_current);
+ /* we can only flush the RX FIFOs */
+ dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH, SYS_CTL);
+ ndelay(500);
+ dnet_writel(bp, 0, SYS_CTL);
+ handled = 1;
+ }
+
+ /* TX FIFO error checking */
+ if (int_current &
+ (DNET_INTR_SRC_TX_FIFOFULL | DNET_INTR_SRC_TX_DISCFRM)) {
+ printk(KERN_ERR "%s: TX fifo error %x, irq %x\n", __func__,
+ dnet_readl(bp, TX_STATUS), int_current);
+ /* we can only flush the TX FIFOs */
+ dnet_writel(bp, DNET_SYS_CTL_TXFIFOFLUSH, SYS_CTL);
+ ndelay(500);
+ dnet_writel(bp, 0, SYS_CTL);
+ handled = 1;
+ }
+
+ if (int_current & DNET_INTR_SRC_RX_CMDFIFOAF) {
+ if (napi_schedule_prep(&bp->napi)) {
+ /*
+ * There's no point taking any more interrupts
+ * until we have processed the buffers
+ */
+ /* Disable Rx interrupts and schedule NAPI poll */
+ int_enable = dnet_readl(bp, INTR_ENB);
+ int_enable &= ~DNET_INTR_SRC_RX_CMDFIFOAF;
+ dnet_writel(bp, int_enable, INTR_ENB);
+ __napi_schedule(&bp->napi);
+ }
+ handled = 1;
+ }
+
+ if (!handled)
+ pr_debug("%s: irq %x remains\n", __func__, int_current);
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ return IRQ_RETVAL(handled);
+}
+
+#ifdef DEBUG
+static inline void dnet_print_skb(struct sk_buff *skb)
+{
+ int k;
+ printk(KERN_DEBUG PFX "data:");
+ for (k = 0; k < skb->len; k++)
+ printk(" %02x", (unsigned int)skb->data[k]);
+ printk("\n");
+}
+#else
+#define dnet_print_skb(skb) do {} while (0)
+#endif
+
+static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+
+ struct dnet *bp = netdev_priv(dev);
+ u32 tx_status, irq_enable;
+ unsigned int len, i, tx_cmd, wrsz;
+ unsigned long flags;
+ unsigned int *bufp;
+
+ tx_status = dnet_readl(bp, TX_STATUS);
+
+ pr_debug("start_xmit: len %u head %p data %p\n",
+ skb->len, skb->head, skb->data);
+ dnet_print_skb(skb);
+
+ /* frame size (words) */
+ len = (skb->len + 3) >> 2;
+
+ spin_lock_irqsave(&bp->lock, flags);
+
+ tx_status = dnet_readl(bp, TX_STATUS);
+
+ bufp = (unsigned int *)(((unsigned long) skb->data) & ~0x3UL);
+ wrsz = (u32) skb->len + 3;
+ wrsz += ((unsigned long) skb->data) & 0x3;
+ wrsz >>= 2;
+ tx_cmd = ((((unsigned long)(skb->data)) & 0x03) << 16) | (u32) skb->len;
+
+ /* check if there is enough room for the current frame */
+ if (wrsz < (DNET_FIFO_SIZE - dnet_readl(bp, TX_FIFO_WCNT))) {
+ for (i = 0; i < wrsz; i++)
+ dnet_writel(bp, *bufp++, TX_DATA_FIFO);
+
+ /*
+ * inform MAC that a packet's written and ready to be
+ * shipped out
+ */
+ dnet_writel(bp, tx_cmd, TX_LEN_FIFO);
+ }
+
+ if (dnet_readl(bp, TX_FIFO_WCNT) > DNET_FIFO_TX_DATA_AF_TH) {
+ netif_stop_queue(dev);
+ tx_status = dnet_readl(bp, INTR_SRC);
+ irq_enable = dnet_readl(bp, INTR_ENB);
+ irq_enable |= DNET_INTR_ENB_TX_FIFOAE;
+ dnet_writel(bp, irq_enable, INTR_ENB);
+ }
+
+ skb_tx_timestamp(skb);
+
+ /* free the buffer */
+ dev_kfree_skb(skb);
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+static void dnet_reset_hw(struct dnet *bp)
+{
+ /* put ts_mac in IDLE state i.e. disable rx/tx */
+ dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, DNET_INTERNAL_MODE_FCEN);
+
+ /*
+ * RX FIFO almost full threshold: only cmd FIFO almost full is
+ * implemented for RX side
+ */
+ dnet_writel(bp, DNET_FIFO_RX_CMD_AF_TH, RX_FIFO_TH);
+ /*
+ * TX FIFO almost empty threshold: only data FIFO almost empty
+ * is implemented for TX side
+ */
+ dnet_writel(bp, DNET_FIFO_TX_DATA_AE_TH, TX_FIFO_TH);
+
+ /* flush rx/tx fifos */
+ dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH | DNET_SYS_CTL_TXFIFOFLUSH,
+ SYS_CTL);
+ msleep(1);
+ dnet_writel(bp, 0, SYS_CTL);
+}
+
+static void dnet_init_hw(struct dnet *bp)
+{
+ u32 config;
+
+ dnet_reset_hw(bp);
+ __dnet_set_hwaddr(bp);
+
+ config = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG);
+
+ if (bp->dev->flags & IFF_PROMISC)
+ /* Copy All Frames */
+ config |= DNET_INTERNAL_RXTX_CONTROL_ENPROMISC;
+ if (!(bp->dev->flags & IFF_BROADCAST))
+ /* No BroadCast */
+ config |= DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST;
+
+ config |= DNET_INTERNAL_RXTX_CONTROL_RXPAUSE |
+ DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST |
+ DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL |
+ DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS;
+
+ dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, config);
+
+ /* clear irq before enabling them */
+ config = dnet_readl(bp, INTR_SRC);
+
+ /* enable RX/TX interrupt, recv packet ready interrupt */
+ dnet_writel(bp, DNET_INTR_ENB_GLOBAL_ENABLE | DNET_INTR_ENB_RX_SUMMARY |
+ DNET_INTR_ENB_TX_SUMMARY | DNET_INTR_ENB_RX_FIFOERR |
+ DNET_INTR_ENB_RX_ERROR | DNET_INTR_ENB_RX_FIFOFULL |
+ DNET_INTR_ENB_TX_FIFOFULL | DNET_INTR_ENB_TX_DISCFRM |
+ DNET_INTR_ENB_RX_PKTRDY, INTR_ENB);
+}
+
+static int dnet_open(struct net_device *dev)
+{
+ struct dnet *bp = netdev_priv(dev);
+
+ /* if the phy is not yet register, retry later */
+ if (!bp->phy_dev)
+ return -EAGAIN;
+
+ napi_enable(&bp->napi);
+ dnet_init_hw(bp);
+
+ phy_start_aneg(bp->phy_dev);
+
+ /* schedule a link state check */
+ phy_start(bp->phy_dev);
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static int dnet_close(struct net_device *dev)
+{
+ struct dnet *bp = netdev_priv(dev);
+
+ netif_stop_queue(dev);
+ napi_disable(&bp->napi);
+
+ if (bp->phy_dev)
+ phy_stop(bp->phy_dev);
+
+ dnet_reset_hw(bp);
+ netif_carrier_off(dev);
+
+ return 0;
+}
+
+static inline void dnet_print_pretty_hwstats(struct dnet_stats *hwstat)
+{
+ pr_debug("%s\n", __func__);
+ pr_debug("----------------------------- RX statistics "
+ "-------------------------------\n");
+ pr_debug("RX_PKT_IGNR_CNT %-8x\n", hwstat->rx_pkt_ignr);
+ pr_debug("RX_LEN_CHK_ERR_CNT %-8x\n", hwstat->rx_len_chk_err);
+ pr_debug("RX_LNG_FRM_CNT %-8x\n", hwstat->rx_lng_frm);
+ pr_debug("RX_SHRT_FRM_CNT %-8x\n", hwstat->rx_shrt_frm);
+ pr_debug("RX_IPG_VIOL_CNT %-8x\n", hwstat->rx_ipg_viol);
+ pr_debug("RX_CRC_ERR_CNT %-8x\n", hwstat->rx_crc_err);
+ pr_debug("RX_OK_PKT_CNT %-8x\n", hwstat->rx_ok_pkt);
+ pr_debug("RX_CTL_FRM_CNT %-8x\n", hwstat->rx_ctl_frm);
+ pr_debug("RX_PAUSE_FRM_CNT %-8x\n", hwstat->rx_pause_frm);
+ pr_debug("RX_MULTICAST_CNT %-8x\n", hwstat->rx_multicast);
+ pr_debug("RX_BROADCAST_CNT %-8x\n", hwstat->rx_broadcast);
+ pr_debug("RX_VLAN_TAG_CNT %-8x\n", hwstat->rx_vlan_tag);
+ pr_debug("RX_PRE_SHRINK_CNT %-8x\n", hwstat->rx_pre_shrink);
+ pr_debug("RX_DRIB_NIB_CNT %-8x\n", hwstat->rx_drib_nib);
+ pr_debug("RX_UNSUP_OPCD_CNT %-8x\n", hwstat->rx_unsup_opcd);
+ pr_debug("RX_BYTE_CNT %-8x\n", hwstat->rx_byte);
+ pr_debug("----------------------------- TX statistics "
+ "-------------------------------\n");
+ pr_debug("TX_UNICAST_CNT %-8x\n", hwstat->tx_unicast);
+ pr_debug("TX_PAUSE_FRM_CNT %-8x\n", hwstat->tx_pause_frm);
+ pr_debug("TX_MULTICAST_CNT %-8x\n", hwstat->tx_multicast);
+ pr_debug("TX_BRDCAST_CNT %-8x\n", hwstat->tx_brdcast);
+ pr_debug("TX_VLAN_TAG_CNT %-8x\n", hwstat->tx_vlan_tag);
+ pr_debug("TX_BAD_FCS_CNT %-8x\n", hwstat->tx_bad_fcs);
+ pr_debug("TX_JUMBO_CNT %-8x\n", hwstat->tx_jumbo);
+ pr_debug("TX_BYTE_CNT %-8x\n", hwstat->tx_byte);
+}
+
+static struct net_device_stats *dnet_get_stats(struct net_device *dev)
+{
+
+ struct dnet *bp = netdev_priv(dev);
+ struct net_device_stats *nstat = &dev->stats;
+ struct dnet_stats *hwstat = &bp->hw_stats;
+
+ /* read stats from hardware */
+ dnet_update_stats(bp);
+
+ /* Convert HW stats into netdevice stats */
+ nstat->rx_errors = (hwstat->rx_len_chk_err +
+ hwstat->rx_lng_frm + hwstat->rx_shrt_frm +
+ /* ignore IGP violation error
+ hwstat->rx_ipg_viol + */
+ hwstat->rx_crc_err +
+ hwstat->rx_pre_shrink +
+ hwstat->rx_drib_nib + hwstat->rx_unsup_opcd);
+ nstat->tx_errors = hwstat->tx_bad_fcs;
+ nstat->rx_length_errors = (hwstat->rx_len_chk_err +
+ hwstat->rx_lng_frm +
+ hwstat->rx_shrt_frm + hwstat->rx_pre_shrink);
+ nstat->rx_crc_errors = hwstat->rx_crc_err;
+ nstat->rx_frame_errors = hwstat->rx_pre_shrink + hwstat->rx_drib_nib;
+ nstat->rx_packets = hwstat->rx_ok_pkt;
+ nstat->tx_packets = (hwstat->tx_unicast +
+ hwstat->tx_multicast + hwstat->tx_brdcast);
+ nstat->rx_bytes = hwstat->rx_byte;
+ nstat->tx_bytes = hwstat->tx_byte;
+ nstat->multicast = hwstat->rx_multicast;
+ nstat->rx_missed_errors = hwstat->rx_pkt_ignr;
+
+ dnet_print_pretty_hwstats(hwstat);
+
+ return nstat;
+}
+
+static int dnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct dnet *bp = netdev_priv(dev);
+ struct phy_device *phydev = bp->phy_dev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_ethtool_gset(phydev, cmd);
+}
+
+static int dnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct dnet *bp = netdev_priv(dev);
+ struct phy_device *phydev = bp->phy_dev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_ethtool_sset(phydev, cmd);
+}
+
+static int dnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct dnet *bp = netdev_priv(dev);
+ struct phy_device *phydev = bp->phy_dev;
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_mii_ioctl(phydev, rq, cmd);
+}
+
+static void dnet_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ strlcpy(info->bus_info, "0", sizeof(info->bus_info));
+}
+
+static const struct ethtool_ops dnet_ethtool_ops = {
+ .get_settings = dnet_get_settings,
+ .set_settings = dnet_set_settings,
+ .get_drvinfo = dnet_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_ts_info = ethtool_op_get_ts_info,
+};
+
+static const struct net_device_ops dnet_netdev_ops = {
+ .ndo_open = dnet_open,
+ .ndo_stop = dnet_close,
+ .ndo_get_stats = dnet_get_stats,
+ .ndo_start_xmit = dnet_start_xmit,
+ .ndo_do_ioctl = dnet_ioctl,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+};
+
+static int dnet_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct net_device *dev;
+ struct dnet *bp;
+ struct phy_device *phydev;
+ int err;
+ unsigned int irq;
+
+ irq = platform_get_irq(pdev, 0);
+
+ dev = alloc_etherdev(sizeof(*bp));
+ if (!dev)
+ return -ENOMEM;
+
+ /* TODO: Actually, we have some interesting features... */
+ dev->features |= 0;
+
+ bp = netdev_priv(dev);
+ bp->dev = dev;
+
+ platform_set_drvdata(pdev, dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ spin_lock_init(&bp->lock);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ bp->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(bp->regs)) {
+ err = PTR_ERR(bp->regs);
+ goto err_out_free_dev;
+ }
+
+ dev->irq = irq;
+ err = request_irq(dev->irq, dnet_interrupt, 0, DRV_NAME, dev);
+ if (err) {
+ dev_err(&pdev->dev, "Unable to request IRQ %d (error %d)\n",
+ irq, err);
+ goto err_out_free_dev;
+ }
+
+ dev->netdev_ops = &dnet_netdev_ops;
+ netif_napi_add(dev, &bp->napi, dnet_poll, 64);
+ dev->ethtool_ops = &dnet_ethtool_ops;
+
+ dev->base_addr = (unsigned long)bp->regs;
+
+ bp->capabilities = dnet_readl(bp, VERCAPS) & DNET_CAPS_MASK;
+
+ dnet_get_hwaddr(bp);
+
+ if (!is_valid_ether_addr(dev->dev_addr)) {
+ /* choose a random ethernet address */
+ eth_hw_addr_random(dev);
+ __dnet_set_hwaddr(bp);
+ }
+
+ err = register_netdev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
+ goto err_out_free_irq;
+ }
+
+ /* register the PHY board fixup (for Marvell 88E1111) */
+ err = phy_register_fixup_for_uid(0x01410cc0, 0xfffffff0,
+ dnet_phy_marvell_fixup);
+ /* we can live without it, so just issue a warning */
+ if (err)
+ dev_warn(&pdev->dev, "Cannot register PHY board fixup.\n");
+
+ err = dnet_mii_init(bp);
+ if (err)
+ goto err_out_unregister_netdev;
+
+ dev_info(&pdev->dev, "Dave DNET at 0x%p (0x%08x) irq %d %pM\n",
+ bp->regs, (unsigned int)res->start, dev->irq, dev->dev_addr);
+ dev_info(&pdev->dev, "has %smdio, %sirq, %sgigabit, %sdma\n",
+ (bp->capabilities & DNET_HAS_MDIO) ? "" : "no ",
+ (bp->capabilities & DNET_HAS_IRQ) ? "" : "no ",
+ (bp->capabilities & DNET_HAS_GIGABIT) ? "" : "no ",
+ (bp->capabilities & DNET_HAS_DMA) ? "" : "no ");
+ phydev = bp->phy_dev;
+ dev_info(&pdev->dev, "attached PHY driver [%s] "
+ "(mii_bus:phy_addr=%s, irq=%d)\n",
+ phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
+
+ return 0;
+
+err_out_unregister_netdev:
+ unregister_netdev(dev);
+err_out_free_irq:
+ free_irq(dev->irq, dev);
+err_out_free_dev:
+ free_netdev(dev);
+ return err;
+}
+
+static int dnet_remove(struct platform_device *pdev)
+{
+
+ struct net_device *dev;
+ struct dnet *bp;
+
+ dev = platform_get_drvdata(pdev);
+
+ if (dev) {
+ bp = netdev_priv(dev);
+ if (bp->phy_dev)
+ phy_disconnect(bp->phy_dev);
+ mdiobus_unregister(bp->mii_bus);
+ mdiobus_free(bp->mii_bus);
+ unregister_netdev(dev);
+ free_irq(dev->irq, dev);
+ free_netdev(dev);
+ }
+
+ return 0;
+}
+
+static struct platform_driver dnet_driver = {
+ .probe = dnet_probe,
+ .remove = dnet_remove,
+ .driver = {
+ .name = "dnet",
+ },
+};
+
+module_platform_driver(dnet_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Dave DNET Ethernet driver");
+MODULE_AUTHOR("Ilya Yanok <yanok@emcraft.com>, "
+ "Matteo Vit <matteo.vit@dave.eu>");
Code Review / kvmfornfv.git / blobdiff