+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2015 Mans Rullgard <mans@mansr.com>
- *
- * Mostly rewritten, based on driver from Sigma Designs. Original
- * copyright notice below.
- *
- * Driver for tangox SMP864x/SMP865x/SMP867x/SMP868x builtin Ethernet Mac.
- *
- * Copyright (C) 2005 Maxime Bizon <mbizon@freebox.fr>
- */
-
-#include <linux/module.h>
-#include <linux/etherdevice.h>
-#include <linux/delay.h>
-#include <linux/ethtool.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/of_device.h>
-#include <linux/of_mdio.h>
-#include <linux/of_net.h>
-#include <linux/dma-mapping.h>
-#include <linux/phy.h>
-#include <linux/cache.h>
-#include <linux/jiffies.h>
-#include <linux/io.h>
-#include <linux/iopoll.h>
-#include <asm/barrier.h>
-
-#include "nb8800.h"
-
-static void nb8800_tx_done(struct net_device *dev);
-static int nb8800_dma_stop(struct net_device *dev);
-
-static inline u8 nb8800_readb(struct nb8800_priv *priv, int reg)
-{
- return readb_relaxed(priv->base + reg);
-}
-
-static inline u32 nb8800_readl(struct nb8800_priv *priv, int reg)
-{
- return readl_relaxed(priv->base + reg);
-}
-
-static inline void nb8800_writeb(struct nb8800_priv *priv, int reg, u8 val)
-{
- writeb_relaxed(val, priv->base + reg);
-}
-
-static inline void nb8800_writew(struct nb8800_priv *priv, int reg, u16 val)
-{
- writew_relaxed(val, priv->base + reg);
-}
-
-static inline void nb8800_writel(struct nb8800_priv *priv, int reg, u32 val)
-{
- writel_relaxed(val, priv->base + reg);
-}
-
-static inline void nb8800_maskb(struct nb8800_priv *priv, int reg,
- u32 mask, u32 val)
-{
- u32 old = nb8800_readb(priv, reg);
- u32 new = (old & ~mask) | (val & mask);
-
- if (new != old)
- nb8800_writeb(priv, reg, new);
-}
-
-static inline void nb8800_maskl(struct nb8800_priv *priv, int reg,
- u32 mask, u32 val)
-{
- u32 old = nb8800_readl(priv, reg);
- u32 new = (old & ~mask) | (val & mask);
-
- if (new != old)
- nb8800_writel(priv, reg, new);
-}
-
-static inline void nb8800_modb(struct nb8800_priv *priv, int reg, u8 bits,
- bool set)
-{
- nb8800_maskb(priv, reg, bits, set ? bits : 0);
-}
-
-static inline void nb8800_setb(struct nb8800_priv *priv, int reg, u8 bits)
-{
- nb8800_maskb(priv, reg, bits, bits);
-}
-
-static inline void nb8800_clearb(struct nb8800_priv *priv, int reg, u8 bits)
-{
- nb8800_maskb(priv, reg, bits, 0);
-}
-
-static inline void nb8800_modl(struct nb8800_priv *priv, int reg, u32 bits,
- bool set)
-{
- nb8800_maskl(priv, reg, bits, set ? bits : 0);
-}
-
-static inline void nb8800_setl(struct nb8800_priv *priv, int reg, u32 bits)
-{
- nb8800_maskl(priv, reg, bits, bits);
-}
-
-static inline void nb8800_clearl(struct nb8800_priv *priv, int reg, u32 bits)
-{
- nb8800_maskl(priv, reg, bits, 0);
-}
-
-static int nb8800_mdio_wait(struct mii_bus *bus)
-{
- struct nb8800_priv *priv = bus->priv;
- u32 val;
-
- return readl_poll_timeout_atomic(priv->base + NB8800_MDIO_CMD,
- val, !(val & MDIO_CMD_GO), 1, 1000);
-}
-
-static int nb8800_mdio_cmd(struct mii_bus *bus, u32 cmd)
-{
- struct nb8800_priv *priv = bus->priv;
- int err;
-
- err = nb8800_mdio_wait(bus);
- if (err)
- return err;
-
- nb8800_writel(priv, NB8800_MDIO_CMD, cmd);
- udelay(10);
- nb8800_writel(priv, NB8800_MDIO_CMD, cmd | MDIO_CMD_GO);
-
- return nb8800_mdio_wait(bus);
-}
-
-static int nb8800_mdio_read(struct mii_bus *bus, int phy_id, int reg)
-{
- struct nb8800_priv *priv = bus->priv;
- u32 val;
- int err;
-
- err = nb8800_mdio_cmd(bus, MDIO_CMD_ADDR(phy_id) | MDIO_CMD_REG(reg));
- if (err)
- return err;
-
- val = nb8800_readl(priv, NB8800_MDIO_STS);
- if (val & MDIO_STS_ERR)
- return 0xffff;
-
- return val & 0xffff;
-}
-
-static int nb8800_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
-{
- u32 cmd = MDIO_CMD_ADDR(phy_id) | MDIO_CMD_REG(reg) |
- MDIO_CMD_DATA(val) | MDIO_CMD_WR;
-
- return nb8800_mdio_cmd(bus, cmd);
-}
-
-static void nb8800_mac_tx(struct net_device *dev, bool enable)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
-
- while (nb8800_readl(priv, NB8800_TXC_CR) & TCR_EN)
- cpu_relax();
-
- nb8800_modb(priv, NB8800_TX_CTL1, TX_EN, enable);
-}
-
-static void nb8800_mac_rx(struct net_device *dev, bool enable)
-{
- nb8800_modb(netdev_priv(dev), NB8800_RX_CTL, RX_EN, enable);
-}
-
-static void nb8800_mac_af(struct net_device *dev, bool enable)
-{
- nb8800_modb(netdev_priv(dev), NB8800_RX_CTL, RX_AF_EN, enable);
-}
-
-static void nb8800_start_rx(struct net_device *dev)
-{
- nb8800_setl(netdev_priv(dev), NB8800_RXC_CR, RCR_EN);
-}
-
-static int nb8800_alloc_rx(struct net_device *dev, unsigned int i, bool napi)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_rx_desc *rxd = &priv->rx_descs[i];
- struct nb8800_rx_buf *rxb = &priv->rx_bufs[i];
- int size = L1_CACHE_ALIGN(RX_BUF_SIZE);
- dma_addr_t dma_addr;
- struct page *page;
- unsigned long offset;
- void *data;
-
- data = napi ? napi_alloc_frag(size) : netdev_alloc_frag(size);
- if (!data)
- return -ENOMEM;
-
- page = virt_to_head_page(data);
- offset = data - page_address(page);
-
- dma_addr = dma_map_page(&dev->dev, page, offset, RX_BUF_SIZE,
- DMA_FROM_DEVICE);
-
- if (dma_mapping_error(&dev->dev, dma_addr)) {
- skb_free_frag(data);
- return -ENOMEM;
- }
-
- rxb->page = page;
- rxb->offset = offset;
- rxd->desc.s_addr = dma_addr;
-
- return 0;
-}
-
-static void nb8800_receive(struct net_device *dev, unsigned int i,
- unsigned int len)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_rx_desc *rxd = &priv->rx_descs[i];
- struct page *page = priv->rx_bufs[i].page;
- int offset = priv->rx_bufs[i].offset;
- void *data = page_address(page) + offset;
- dma_addr_t dma = rxd->desc.s_addr;
- struct sk_buff *skb;
- unsigned int size;
- int err;
-
- size = len <= RX_COPYBREAK ? len : RX_COPYHDR;
-
- skb = napi_alloc_skb(&priv->napi, size);
- if (!skb) {
- netdev_err(dev, "rx skb allocation failed\n");
- dev->stats.rx_dropped++;
- return;
- }
-
- if (len <= RX_COPYBREAK) {
- dma_sync_single_for_cpu(&dev->dev, dma, len, DMA_FROM_DEVICE);
- skb_put_data(skb, data, len);
- dma_sync_single_for_device(&dev->dev, dma, len,
- DMA_FROM_DEVICE);
- } else {
- err = nb8800_alloc_rx(dev, i, true);
- if (err) {
- netdev_err(dev, "rx buffer allocation failed\n");
- dev->stats.rx_dropped++;
- dev_kfree_skb(skb);
- return;
- }
-
- dma_unmap_page(&dev->dev, dma, RX_BUF_SIZE, DMA_FROM_DEVICE);
- skb_put_data(skb, data, RX_COPYHDR);
- skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
- offset + RX_COPYHDR, len - RX_COPYHDR,
- RX_BUF_SIZE);
- }
-
- skb->protocol = eth_type_trans(skb, dev);
- napi_gro_receive(&priv->napi, skb);
-}
-
-static void nb8800_rx_error(struct net_device *dev, u32 report)
-{
- if (report & RX_LENGTH_ERR)
- dev->stats.rx_length_errors++;
-
- if (report & RX_FCS_ERR)
- dev->stats.rx_crc_errors++;
-
- if (report & RX_FIFO_OVERRUN)
- dev->stats.rx_fifo_errors++;
-
- if (report & RX_ALIGNMENT_ERROR)
- dev->stats.rx_frame_errors++;
-
- dev->stats.rx_errors++;
-}
-
-static int nb8800_poll(struct napi_struct *napi, int budget)
-{
- struct net_device *dev = napi->dev;
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_rx_desc *rxd;
- unsigned int last = priv->rx_eoc;
- unsigned int next;
- int work = 0;
-
- nb8800_tx_done(dev);
-
-again:
- do {
- unsigned int len;
-
- next = (last + 1) % RX_DESC_COUNT;
-
- rxd = &priv->rx_descs[next];
-
- if (!rxd->report)
- break;
-
- len = RX_BYTES_TRANSFERRED(rxd->report);
-
- if (IS_RX_ERROR(rxd->report))
- nb8800_rx_error(dev, rxd->report);
- else
- nb8800_receive(dev, next, len);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += len;
-
- if (rxd->report & RX_MULTICAST_PKT)
- dev->stats.multicast++;
-
- rxd->report = 0;
- last = next;
- work++;
- } while (work < budget);
-
- if (work) {
- priv->rx_descs[last].desc.config |= DESC_EOC;
- wmb(); /* ensure new EOC is written before clearing old */
- priv->rx_descs[priv->rx_eoc].desc.config &= ~DESC_EOC;
- priv->rx_eoc = last;
- nb8800_start_rx(dev);
- }
-
- if (work < budget) {
- nb8800_writel(priv, NB8800_RX_ITR, priv->rx_itr_irq);
-
- /* If a packet arrived after we last checked but
- * before writing RX_ITR, the interrupt will be
- * delayed, so we retrieve it now.
- */
- if (priv->rx_descs[next].report)
- goto again;
-
- napi_complete_done(napi, work);
- }
-
- return work;
-}
-
-static void __nb8800_tx_dma_start(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_tx_buf *txb;
- u32 txc_cr;
-
- txb = &priv->tx_bufs[priv->tx_queue];
- if (!txb->ready)
- return;
-
- txc_cr = nb8800_readl(priv, NB8800_TXC_CR);
- if (txc_cr & TCR_EN)
- return;
-
- nb8800_writel(priv, NB8800_TX_DESC_ADDR, txb->dma_desc);
- wmb(); /* ensure desc addr is written before starting DMA */
- nb8800_writel(priv, NB8800_TXC_CR, txc_cr | TCR_EN);
-
- priv->tx_queue = (priv->tx_queue + txb->chain_len) % TX_DESC_COUNT;
-}
-
-static void nb8800_tx_dma_start(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
-
- spin_lock_irq(&priv->tx_lock);
- __nb8800_tx_dma_start(dev);
- spin_unlock_irq(&priv->tx_lock);
-}
-
-static void nb8800_tx_dma_start_irq(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
-
- spin_lock(&priv->tx_lock);
- __nb8800_tx_dma_start(dev);
- spin_unlock(&priv->tx_lock);
-}
-
-static netdev_tx_t nb8800_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_tx_desc *txd;
- struct nb8800_tx_buf *txb;
- struct nb8800_dma_desc *desc;
- dma_addr_t dma_addr;
- unsigned int dma_len;
- unsigned int align;
- unsigned int next;
- bool xmit_more;
-
- if (atomic_read(&priv->tx_free) <= NB8800_DESC_LOW) {
- netif_stop_queue(dev);
- return NETDEV_TX_BUSY;
- }
-
- align = (8 - (uintptr_t)skb->data) & 7;
-
- dma_len = skb->len - align;
- dma_addr = dma_map_single(&dev->dev, skb->data + align,
- dma_len, DMA_TO_DEVICE);
-
- if (dma_mapping_error(&dev->dev, dma_addr)) {
- netdev_err(dev, "tx dma mapping error\n");
- kfree_skb(skb);
- dev->stats.tx_dropped++;
- return NETDEV_TX_OK;
- }
-
- xmit_more = netdev_xmit_more();
- if (atomic_dec_return(&priv->tx_free) <= NB8800_DESC_LOW) {
- netif_stop_queue(dev);
- xmit_more = false;
- }
-
- next = priv->tx_next;
- txb = &priv->tx_bufs[next];
- txd = &priv->tx_descs[next];
- desc = &txd->desc[0];
-
- next = (next + 1) % TX_DESC_COUNT;
-
- if (align) {
- memcpy(txd->buf, skb->data, align);
-
- desc->s_addr =
- txb->dma_desc + offsetof(struct nb8800_tx_desc, buf);
- desc->n_addr = txb->dma_desc + sizeof(txd->desc[0]);
- desc->config = DESC_BTS(2) | DESC_DS | align;
-
- desc++;
- }
-
- desc->s_addr = dma_addr;
- desc->n_addr = priv->tx_bufs[next].dma_desc;
- desc->config = DESC_BTS(2) | DESC_DS | DESC_EOF | dma_len;
-
- if (!xmit_more)
- desc->config |= DESC_EOC;
-
- txb->skb = skb;
- txb->dma_addr = dma_addr;
- txb->dma_len = dma_len;
-
- if (!priv->tx_chain) {
- txb->chain_len = 1;
- priv->tx_chain = txb;
- } else {
- priv->tx_chain->chain_len++;
- }
-
- netdev_sent_queue(dev, skb->len);
-
- priv->tx_next = next;
-
- if (!xmit_more) {
- smp_wmb();
- priv->tx_chain->ready = true;
- priv->tx_chain = NULL;
- nb8800_tx_dma_start(dev);
- }
-
- return NETDEV_TX_OK;
-}
-
-static void nb8800_tx_error(struct net_device *dev, u32 report)
-{
- if (report & TX_LATE_COLLISION)
- dev->stats.collisions++;
-
- if (report & TX_PACKET_DROPPED)
- dev->stats.tx_dropped++;
-
- if (report & TX_FIFO_UNDERRUN)
- dev->stats.tx_fifo_errors++;
-
- dev->stats.tx_errors++;
-}
-
-static void nb8800_tx_done(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- unsigned int limit = priv->tx_next;
- unsigned int done = priv->tx_done;
- unsigned int packets = 0;
- unsigned int len = 0;
-
- while (done != limit) {
- struct nb8800_tx_desc *txd = &priv->tx_descs[done];
- struct nb8800_tx_buf *txb = &priv->tx_bufs[done];
- struct sk_buff *skb;
-
- if (!txd->report)
- break;
-
- skb = txb->skb;
- len += skb->len;
-
- dma_unmap_single(&dev->dev, txb->dma_addr, txb->dma_len,
- DMA_TO_DEVICE);
-
- if (IS_TX_ERROR(txd->report)) {
- nb8800_tx_error(dev, txd->report);
- kfree_skb(skb);
- } else {
- consume_skb(skb);
- }
-
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += TX_BYTES_TRANSFERRED(txd->report);
- dev->stats.collisions += TX_EARLY_COLLISIONS(txd->report);
-
- txb->skb = NULL;
- txb->ready = false;
- txd->report = 0;
-
- done = (done + 1) % TX_DESC_COUNT;
- packets++;
- }
-
- if (packets) {
- smp_mb__before_atomic();
- atomic_add(packets, &priv->tx_free);
- netdev_completed_queue(dev, packets, len);
- netif_wake_queue(dev);
- priv->tx_done = done;
- }
-}
-
-static irqreturn_t nb8800_irq(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct nb8800_priv *priv = netdev_priv(dev);
- irqreturn_t ret = IRQ_NONE;
- u32 val;
-
- /* tx interrupt */
- val = nb8800_readl(priv, NB8800_TXC_SR);
- if (val) {
- nb8800_writel(priv, NB8800_TXC_SR, val);
-
- if (val & TSR_DI)
- nb8800_tx_dma_start_irq(dev);
-
- if (val & TSR_TI)
- napi_schedule_irqoff(&priv->napi);
-
- if (unlikely(val & TSR_DE))
- netdev_err(dev, "TX DMA error\n");
-
- /* should never happen with automatic status retrieval */
- if (unlikely(val & TSR_TO))
- netdev_err(dev, "TX Status FIFO overflow\n");
-
- ret = IRQ_HANDLED;
- }
-
- /* rx interrupt */
- val = nb8800_readl(priv, NB8800_RXC_SR);
- if (val) {
- nb8800_writel(priv, NB8800_RXC_SR, val);
-
- if (likely(val & (RSR_RI | RSR_DI))) {
- nb8800_writel(priv, NB8800_RX_ITR, priv->rx_itr_poll);
- napi_schedule_irqoff(&priv->napi);
- }
-
- if (unlikely(val & RSR_DE))
- netdev_err(dev, "RX DMA error\n");
-
- /* should never happen with automatic status retrieval */
- if (unlikely(val & RSR_RO))
- netdev_err(dev, "RX Status FIFO overflow\n");
-
- ret = IRQ_HANDLED;
- }
-
- return ret;
-}
-
-static void nb8800_mac_config(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- bool gigabit = priv->speed == SPEED_1000;
- u32 mac_mode_mask = RGMII_MODE | HALF_DUPLEX | GMAC_MODE;
- u32 mac_mode = 0;
- u32 slot_time;
- u32 phy_clk;
- u32 ict;
-
- if (!priv->duplex)
- mac_mode |= HALF_DUPLEX;
-
- if (gigabit) {
- if (phy_interface_is_rgmii(dev->phydev))
- mac_mode |= RGMII_MODE;
-
- mac_mode |= GMAC_MODE;
- phy_clk = 125000000;
-
- /* Should be 512 but register is only 8 bits */
- slot_time = 255;
- } else {
- phy_clk = 25000000;
- slot_time = 128;
- }
-
- ict = DIV_ROUND_UP(phy_clk, clk_get_rate(priv->clk));
-
- nb8800_writeb(priv, NB8800_IC_THRESHOLD, ict);
- nb8800_writeb(priv, NB8800_SLOT_TIME, slot_time);
- nb8800_maskb(priv, NB8800_MAC_MODE, mac_mode_mask, mac_mode);
-}
-
-static void nb8800_pause_config(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
- u32 rxcr;
-
- if (priv->pause_aneg) {
- if (!phydev || !phydev->link)
- return;
-
- priv->pause_rx = phydev->pause;
- priv->pause_tx = phydev->pause ^ phydev->asym_pause;
- }
-
- nb8800_modb(priv, NB8800_RX_CTL, RX_PAUSE_EN, priv->pause_rx);
-
- rxcr = nb8800_readl(priv, NB8800_RXC_CR);
- if (!!(rxcr & RCR_FL) == priv->pause_tx)
- return;
-
- if (netif_running(dev)) {
- napi_disable(&priv->napi);
- netif_tx_lock_bh(dev);
- nb8800_dma_stop(dev);
- nb8800_modl(priv, NB8800_RXC_CR, RCR_FL, priv->pause_tx);
- nb8800_start_rx(dev);
- netif_tx_unlock_bh(dev);
- napi_enable(&priv->napi);
- } else {
- nb8800_modl(priv, NB8800_RXC_CR, RCR_FL, priv->pause_tx);
- }
-}
-
-static void nb8800_link_reconfigure(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
- int change = 0;
-
- if (phydev->link) {
- if (phydev->speed != priv->speed) {
- priv->speed = phydev->speed;
- change = 1;
- }
-
- if (phydev->duplex != priv->duplex) {
- priv->duplex = phydev->duplex;
- change = 1;
- }
-
- if (change)
- nb8800_mac_config(dev);
-
- nb8800_pause_config(dev);
- }
-
- if (phydev->link != priv->link) {
- priv->link = phydev->link;
- change = 1;
- }
-
- if (change)
- phy_print_status(phydev);
-}
-
-static void nb8800_update_mac_addr(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- int i;
-
- for (i = 0; i < ETH_ALEN; i++)
- nb8800_writeb(priv, NB8800_SRC_ADDR(i), dev->dev_addr[i]);
-
- for (i = 0; i < ETH_ALEN; i++)
- nb8800_writeb(priv, NB8800_UC_ADDR(i), dev->dev_addr[i]);
-}
-
-static int nb8800_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sock = addr;
-
- if (netif_running(dev))
- return -EBUSY;
-
- ether_addr_copy(dev->dev_addr, sock->sa_data);
- nb8800_update_mac_addr(dev);
-
- return 0;
-}
-
-static void nb8800_mc_init(struct net_device *dev, int val)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
-
- nb8800_writeb(priv, NB8800_MC_INIT, val);
- readb_poll_timeout_atomic(priv->base + NB8800_MC_INIT, val, !val,
- 1, 1000);
-}
-
-static void nb8800_set_rx_mode(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct netdev_hw_addr *ha;
- int i;
-
- if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
- nb8800_mac_af(dev, false);
- return;
- }
-
- nb8800_mac_af(dev, true);
- nb8800_mc_init(dev, 0);
-
- netdev_for_each_mc_addr(ha, dev) {
- for (i = 0; i < ETH_ALEN; i++)
- nb8800_writeb(priv, NB8800_MC_ADDR(i), ha->addr[i]);
-
- nb8800_mc_init(dev, 0xff);
- }
-}
-
-#define RX_DESC_SIZE (RX_DESC_COUNT * sizeof(struct nb8800_rx_desc))
-#define TX_DESC_SIZE (TX_DESC_COUNT * sizeof(struct nb8800_tx_desc))
-
-static void nb8800_dma_free(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- unsigned int i;
-
- if (priv->rx_bufs) {
- for (i = 0; i < RX_DESC_COUNT; i++)
- if (priv->rx_bufs[i].page)
- put_page(priv->rx_bufs[i].page);
-
- kfree(priv->rx_bufs);
- priv->rx_bufs = NULL;
- }
-
- if (priv->tx_bufs) {
- for (i = 0; i < TX_DESC_COUNT; i++)
- kfree_skb(priv->tx_bufs[i].skb);
-
- kfree(priv->tx_bufs);
- priv->tx_bufs = NULL;
- }
-
- if (priv->rx_descs) {
- dma_free_coherent(dev->dev.parent, RX_DESC_SIZE, priv->rx_descs,
- priv->rx_desc_dma);
- priv->rx_descs = NULL;
- }
-
- if (priv->tx_descs) {
- dma_free_coherent(dev->dev.parent, TX_DESC_SIZE, priv->tx_descs,
- priv->tx_desc_dma);
- priv->tx_descs = NULL;
- }
-}
-
-static void nb8800_dma_reset(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_rx_desc *rxd;
- struct nb8800_tx_desc *txd;
- unsigned int i;
-
- for (i = 0; i < RX_DESC_COUNT; i++) {
- dma_addr_t rx_dma = priv->rx_desc_dma + i * sizeof(*rxd);
-
- rxd = &priv->rx_descs[i];
- rxd->desc.n_addr = rx_dma + sizeof(*rxd);
- rxd->desc.r_addr =
- rx_dma + offsetof(struct nb8800_rx_desc, report);
- rxd->desc.config = priv->rx_dma_config;
- rxd->report = 0;
- }
-
- rxd->desc.n_addr = priv->rx_desc_dma;
- rxd->desc.config |= DESC_EOC;
-
- priv->rx_eoc = RX_DESC_COUNT - 1;
-
- for (i = 0; i < TX_DESC_COUNT; i++) {
- struct nb8800_tx_buf *txb = &priv->tx_bufs[i];
- dma_addr_t r_dma = txb->dma_desc +
- offsetof(struct nb8800_tx_desc, report);
-
- txd = &priv->tx_descs[i];
- txd->desc[0].r_addr = r_dma;
- txd->desc[1].r_addr = r_dma;
- txd->report = 0;
- }
-
- priv->tx_next = 0;
- priv->tx_queue = 0;
- priv->tx_done = 0;
- atomic_set(&priv->tx_free, TX_DESC_COUNT);
-
- nb8800_writel(priv, NB8800_RX_DESC_ADDR, priv->rx_desc_dma);
-
- wmb(); /* ensure all setup is written before starting */
-}
-
-static int nb8800_dma_init(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- unsigned int n_rx = RX_DESC_COUNT;
- unsigned int n_tx = TX_DESC_COUNT;
- unsigned int i;
- int err;
-
- priv->rx_descs = dma_alloc_coherent(dev->dev.parent, RX_DESC_SIZE,
- &priv->rx_desc_dma, GFP_KERNEL);
- if (!priv->rx_descs)
- goto err_out;
-
- priv->rx_bufs = kcalloc(n_rx, sizeof(*priv->rx_bufs), GFP_KERNEL);
- if (!priv->rx_bufs)
- goto err_out;
-
- for (i = 0; i < n_rx; i++) {
- err = nb8800_alloc_rx(dev, i, false);
- if (err)
- goto err_out;
- }
-
- priv->tx_descs = dma_alloc_coherent(dev->dev.parent, TX_DESC_SIZE,
- &priv->tx_desc_dma, GFP_KERNEL);
- if (!priv->tx_descs)
- goto err_out;
-
- priv->tx_bufs = kcalloc(n_tx, sizeof(*priv->tx_bufs), GFP_KERNEL);
- if (!priv->tx_bufs)
- goto err_out;
-
- for (i = 0; i < n_tx; i++)
- priv->tx_bufs[i].dma_desc =
- priv->tx_desc_dma + i * sizeof(struct nb8800_tx_desc);
-
- nb8800_dma_reset(dev);
-
- return 0;
-
-err_out:
- nb8800_dma_free(dev);
-
- return -ENOMEM;
-}
-
-static int nb8800_dma_stop(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_tx_buf *txb = &priv->tx_bufs[0];
- struct nb8800_tx_desc *txd = &priv->tx_descs[0];
- int retry = 5;
- u32 txcr;
- u32 rxcr;
- int err;
- unsigned int i;
-
- /* wait for tx to finish */
- err = readl_poll_timeout_atomic(priv->base + NB8800_TXC_CR, txcr,
- !(txcr & TCR_EN) &&
- priv->tx_done == priv->tx_next,
- 1000, 1000000);
- if (err)
- return err;
-
- /* The rx DMA only stops if it reaches the end of chain.
- * To make this happen, we set the EOC flag on all rx
- * descriptors, put the device in loopback mode, and send
- * a few dummy frames. The interrupt handler will ignore
- * these since NAPI is disabled and no real frames are in
- * the tx queue.
- */
-
- for (i = 0; i < RX_DESC_COUNT; i++)
- priv->rx_descs[i].desc.config |= DESC_EOC;
-
- txd->desc[0].s_addr =
- txb->dma_desc + offsetof(struct nb8800_tx_desc, buf);
- txd->desc[0].config = DESC_BTS(2) | DESC_DS | DESC_EOF | DESC_EOC | 8;
- memset(txd->buf, 0, sizeof(txd->buf));
-
- nb8800_mac_af(dev, false);
- nb8800_setb(priv, NB8800_MAC_MODE, LOOPBACK_EN);
-
- do {
- nb8800_writel(priv, NB8800_TX_DESC_ADDR, txb->dma_desc);
- wmb();
- nb8800_writel(priv, NB8800_TXC_CR, txcr | TCR_EN);
-
- err = readl_poll_timeout_atomic(priv->base + NB8800_RXC_CR,
- rxcr, !(rxcr & RCR_EN),
- 1000, 100000);
- } while (err && --retry);
-
- nb8800_mac_af(dev, true);
- nb8800_clearb(priv, NB8800_MAC_MODE, LOOPBACK_EN);
- nb8800_dma_reset(dev);
-
- return retry ? 0 : -ETIMEDOUT;
-}
-
-static void nb8800_pause_adv(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
-
- if (!phydev)
- return;
-
- phy_set_asym_pause(phydev, priv->pause_rx, priv->pause_tx);
-}
-
-static int nb8800_open(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct phy_device *phydev;
- int err;
-
- /* clear any pending interrupts */
- nb8800_writel(priv, NB8800_RXC_SR, 0xf);
- nb8800_writel(priv, NB8800_TXC_SR, 0xf);
-
- err = nb8800_dma_init(dev);
- if (err)
- return err;
-
- err = request_irq(dev->irq, nb8800_irq, 0, dev_name(&dev->dev), dev);
- if (err)
- goto err_free_dma;
-
- nb8800_mac_rx(dev, true);
- nb8800_mac_tx(dev, true);
-
- phydev = of_phy_connect(dev, priv->phy_node,
- nb8800_link_reconfigure, 0,
- priv->phy_mode);
- if (!phydev) {
- err = -ENODEV;
- goto err_free_irq;
- }
-
- nb8800_pause_adv(dev);
-
- netdev_reset_queue(dev);
- napi_enable(&priv->napi);
- netif_start_queue(dev);
-
- nb8800_start_rx(dev);
- phy_start(phydev);
-
- return 0;
-
-err_free_irq:
- free_irq(dev->irq, dev);
-err_free_dma:
- nb8800_dma_free(dev);
-
- return err;
-}
-
-static int nb8800_stop(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
-
- phy_stop(phydev);
-
- netif_stop_queue(dev);
- napi_disable(&priv->napi);
-
- nb8800_dma_stop(dev);
- nb8800_mac_rx(dev, false);
- nb8800_mac_tx(dev, false);
-
- phy_disconnect(phydev);
-
- free_irq(dev->irq, dev);
-
- nb8800_dma_free(dev);
-
- return 0;
-}
-
-static const struct net_device_ops nb8800_netdev_ops = {
- .ndo_open = nb8800_open,
- .ndo_stop = nb8800_stop,
- .ndo_start_xmit = nb8800_xmit,
- .ndo_set_mac_address = nb8800_set_mac_address,
- .ndo_set_rx_mode = nb8800_set_rx_mode,
- .ndo_do_ioctl = phy_do_ioctl,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static void nb8800_get_pauseparam(struct net_device *dev,
- struct ethtool_pauseparam *pp)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
-
- pp->autoneg = priv->pause_aneg;
- pp->rx_pause = priv->pause_rx;
- pp->tx_pause = priv->pause_tx;
-}
-
-static int nb8800_set_pauseparam(struct net_device *dev,
- struct ethtool_pauseparam *pp)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
-
- priv->pause_aneg = pp->autoneg;
- priv->pause_rx = pp->rx_pause;
- priv->pause_tx = pp->tx_pause;
-
- nb8800_pause_adv(dev);
-
- if (!priv->pause_aneg)
- nb8800_pause_config(dev);
- else if (phydev)
- phy_start_aneg(phydev);
-
- return 0;
-}
-
-static const char nb8800_stats_names[][ETH_GSTRING_LEN] = {
- "rx_bytes_ok",
- "rx_frames_ok",
- "rx_undersize_frames",
- "rx_fragment_frames",
- "rx_64_byte_frames",
- "rx_127_byte_frames",
- "rx_255_byte_frames",
- "rx_511_byte_frames",
- "rx_1023_byte_frames",
- "rx_max_size_frames",
- "rx_oversize_frames",
- "rx_bad_fcs_frames",
- "rx_broadcast_frames",
- "rx_multicast_frames",
- "rx_control_frames",
- "rx_pause_frames",
- "rx_unsup_control_frames",
- "rx_align_error_frames",
- "rx_overrun_frames",
- "rx_jabber_frames",
- "rx_bytes",
- "rx_frames",
-
- "tx_bytes_ok",
- "tx_frames_ok",
- "tx_64_byte_frames",
- "tx_127_byte_frames",
- "tx_255_byte_frames",
- "tx_511_byte_frames",
- "tx_1023_byte_frames",
- "tx_max_size_frames",
- "tx_oversize_frames",
- "tx_broadcast_frames",
- "tx_multicast_frames",
- "tx_control_frames",
- "tx_pause_frames",
- "tx_underrun_frames",
- "tx_single_collision_frames",
- "tx_multi_collision_frames",
- "tx_deferred_collision_frames",
- "tx_late_collision_frames",
- "tx_excessive_collision_frames",
- "tx_bytes",
- "tx_frames",
- "tx_collisions",
-};
-
-#define NB8800_NUM_STATS ARRAY_SIZE(nb8800_stats_names)
-
-static int nb8800_get_sset_count(struct net_device *dev, int sset)
-{
- if (sset == ETH_SS_STATS)
- return NB8800_NUM_STATS;
-
- return -EOPNOTSUPP;
-}
-
-static void nb8800_get_strings(struct net_device *dev, u32 sset, u8 *buf)
-{
- if (sset == ETH_SS_STATS)
- memcpy(buf, &nb8800_stats_names, sizeof(nb8800_stats_names));
-}
-
-static u32 nb8800_read_stat(struct net_device *dev, int index)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
-
- nb8800_writeb(priv, NB8800_STAT_INDEX, index);
-
- return nb8800_readl(priv, NB8800_STAT_DATA);
-}
-
-static void nb8800_get_ethtool_stats(struct net_device *dev,
- struct ethtool_stats *estats, u64 *st)
-{
- unsigned int i;
- u32 rx, tx;
-
- for (i = 0; i < NB8800_NUM_STATS / 2; i++) {
- rx = nb8800_read_stat(dev, i);
- tx = nb8800_read_stat(dev, i | 0x80);
- st[i] = rx;
- st[i + NB8800_NUM_STATS / 2] = tx;
- }
-}
-
-static const struct ethtool_ops nb8800_ethtool_ops = {
- .nway_reset = phy_ethtool_nway_reset,
- .get_link = ethtool_op_get_link,
- .get_pauseparam = nb8800_get_pauseparam,
- .set_pauseparam = nb8800_set_pauseparam,
- .get_sset_count = nb8800_get_sset_count,
- .get_strings = nb8800_get_strings,
- .get_ethtool_stats = nb8800_get_ethtool_stats,
- .get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = phy_ethtool_set_link_ksettings,
-};
-
-static int nb8800_hw_init(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- u32 val;
-
- val = TX_RETRY_EN | TX_PAD_EN | TX_APPEND_FCS;
- nb8800_writeb(priv, NB8800_TX_CTL1, val);
-
- /* Collision retry count */
- nb8800_writeb(priv, NB8800_TX_CTL2, 5);
-
- val = RX_PAD_STRIP | RX_AF_EN;
- nb8800_writeb(priv, NB8800_RX_CTL, val);
-
- /* Chosen by fair dice roll */
- nb8800_writeb(priv, NB8800_RANDOM_SEED, 4);
-
- /* TX cycles per deferral period */
- nb8800_writeb(priv, NB8800_TX_SDP, 12);
-
- /* The following three threshold values have been
- * experimentally determined for good results.
- */
-
- /* RX/TX FIFO threshold for partial empty (64-bit entries) */
- nb8800_writeb(priv, NB8800_PE_THRESHOLD, 0);
-
- /* RX/TX FIFO threshold for partial full (64-bit entries) */
- nb8800_writeb(priv, NB8800_PF_THRESHOLD, 255);
-
- /* Buffer size for transmit (64-bit entries) */
- nb8800_writeb(priv, NB8800_TX_BUFSIZE, 64);
-
- /* Configure tx DMA */
-
- val = nb8800_readl(priv, NB8800_TXC_CR);
- val &= TCR_LE; /* keep endian setting */
- val |= TCR_DM; /* DMA descriptor mode */
- val |= TCR_RS; /* automatically store tx status */
- val |= TCR_DIE; /* interrupt on DMA chain completion */
- val |= TCR_TFI(7); /* interrupt after 7 frames transmitted */
- val |= TCR_BTS(2); /* 32-byte bus transaction size */
- nb8800_writel(priv, NB8800_TXC_CR, val);
-
- /* TX complete interrupt after 10 ms or 7 frames (see above) */
- val = clk_get_rate(priv->clk) / 100;
- nb8800_writel(priv, NB8800_TX_ITR, val);
-
- /* Configure rx DMA */
-
- val = nb8800_readl(priv, NB8800_RXC_CR);
- val &= RCR_LE; /* keep endian setting */
- val |= RCR_DM; /* DMA descriptor mode */
- val |= RCR_RS; /* automatically store rx status */
- val |= RCR_DIE; /* interrupt at end of DMA chain */
- val |= RCR_RFI(7); /* interrupt after 7 frames received */
- val |= RCR_BTS(2); /* 32-byte bus transaction size */
- nb8800_writel(priv, NB8800_RXC_CR, val);
-
- /* The rx interrupt can fire before the DMA has completed
- * unless a small delay is added. 50 us is hopefully enough.
- */
- priv->rx_itr_irq = clk_get_rate(priv->clk) / 20000;
-
- /* In NAPI poll mode we want to disable interrupts, but the
- * hardware does not permit this. Delay 10 ms instead.
- */
- priv->rx_itr_poll = clk_get_rate(priv->clk) / 100;
-
- nb8800_writel(priv, NB8800_RX_ITR, priv->rx_itr_irq);
-
- priv->rx_dma_config = RX_BUF_SIZE | DESC_BTS(2) | DESC_DS | DESC_EOF;
-
- /* Flow control settings */
-
- /* Pause time of 0.1 ms */
- val = 100000 / 512;
- nb8800_writeb(priv, NB8800_PQ1, val >> 8);
- nb8800_writeb(priv, NB8800_PQ2, val & 0xff);
-
- /* Auto-negotiate by default */
- priv->pause_aneg = true;
- priv->pause_rx = true;
- priv->pause_tx = true;
-
- nb8800_mc_init(dev, 0);
-
- return 0;
-}
-
-static int nb8800_tangox_init(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- u32 pad_mode = PAD_MODE_MII;
-
- switch (priv->phy_mode) {
- case PHY_INTERFACE_MODE_MII:
- case PHY_INTERFACE_MODE_GMII:
- pad_mode = PAD_MODE_MII;
- break;
-
- case PHY_INTERFACE_MODE_RGMII:
- case PHY_INTERFACE_MODE_RGMII_ID:
- case PHY_INTERFACE_MODE_RGMII_RXID:
- case PHY_INTERFACE_MODE_RGMII_TXID:
- pad_mode = PAD_MODE_RGMII;
- break;
-
- default:
- dev_err(dev->dev.parent, "unsupported phy mode %s\n",
- phy_modes(priv->phy_mode));
- return -EINVAL;
- }
-
- nb8800_writeb(priv, NB8800_TANGOX_PAD_MODE, pad_mode);
-
- return 0;
-}
-
-static int nb8800_tangox_reset(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- int clk_div;
-
- nb8800_writeb(priv, NB8800_TANGOX_RESET, 0);
- usleep_range(1000, 10000);
- nb8800_writeb(priv, NB8800_TANGOX_RESET, 1);
-
- wmb(); /* ensure reset is cleared before proceeding */
-
- clk_div = DIV_ROUND_UP(clk_get_rate(priv->clk), 2 * MAX_MDC_CLOCK);
- nb8800_writew(priv, NB8800_TANGOX_MDIO_CLKDIV, clk_div);
-
- return 0;
-}
-
-static const struct nb8800_ops nb8800_tangox_ops = {
- .init = nb8800_tangox_init,
- .reset = nb8800_tangox_reset,
-};
-
-static int nb8800_tango4_init(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- int err;
-
- err = nb8800_tangox_init(dev);
- if (err)
- return err;
-
- /* On tango4 interrupt on DMA completion per frame works and gives
- * better performance despite generating more rx interrupts.
- */
-
- /* Disable unnecessary interrupt on rx completion */
- nb8800_clearl(priv, NB8800_RXC_CR, RCR_RFI(7));
-
- /* Request interrupt on descriptor DMA completion */
- priv->rx_dma_config |= DESC_ID;
-
- return 0;
-}
-
-static const struct nb8800_ops nb8800_tango4_ops = {
- .init = nb8800_tango4_init,
- .reset = nb8800_tangox_reset,
-};
-
-static const struct of_device_id nb8800_dt_ids[] = {
- {
- .compatible = "aurora,nb8800",
- },
- {
- .compatible = "sigma,smp8642-ethernet",
- .data = &nb8800_tangox_ops,
- },
- {
- .compatible = "sigma,smp8734-ethernet",
- .data = &nb8800_tango4_ops,
- },
- { }
-};
-MODULE_DEVICE_TABLE(of, nb8800_dt_ids);
-
-static int nb8800_probe(struct platform_device *pdev)
-{
- const struct of_device_id *match;
- const struct nb8800_ops *ops = NULL;
- struct nb8800_priv *priv;
- struct resource *res;
- struct net_device *dev;
- struct mii_bus *bus;
- const unsigned char *mac;
- void __iomem *base;
- int irq;
- int ret;
-
- match = of_match_device(nb8800_dt_ids, &pdev->dev);
- if (match)
- ops = match->data;
-
- irq = platform_get_irq(pdev, 0);
- if (irq <= 0)
- return -EINVAL;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- dev_dbg(&pdev->dev, "AU-NB8800 Ethernet at %pa\n", &res->start);
-
- dev = alloc_etherdev(sizeof(*priv));
- if (!dev)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, dev);
- SET_NETDEV_DEV(dev, &pdev->dev);
-
- priv = netdev_priv(dev);
- priv->base = base;
-
- ret = of_get_phy_mode(pdev->dev.of_node, &priv->phy_mode);
- if (ret)
- priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
-
- priv->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(priv->clk)) {
- dev_err(&pdev->dev, "failed to get clock\n");
- ret = PTR_ERR(priv->clk);
- goto err_free_dev;
- }
-
- ret = clk_prepare_enable(priv->clk);
- if (ret)
- goto err_free_dev;
-
- spin_lock_init(&priv->tx_lock);
-
- if (ops && ops->reset) {
- ret = ops->reset(dev);
- if (ret)
- goto err_disable_clk;
- }
-
- bus = devm_mdiobus_alloc(&pdev->dev);
- if (!bus) {
- ret = -ENOMEM;
- goto err_disable_clk;
- }
-
- bus->name = "nb8800-mii";
- bus->read = nb8800_mdio_read;
- bus->write = nb8800_mdio_write;
- bus->parent = &pdev->dev;
- snprintf(bus->id, MII_BUS_ID_SIZE, "%lx.nb8800-mii",
- (unsigned long)res->start);
- bus->priv = priv;
-
- ret = of_mdiobus_register(bus, pdev->dev.of_node);
- if (ret) {
- dev_err(&pdev->dev, "failed to register MII bus\n");
- goto err_disable_clk;
- }
-
- if (of_phy_is_fixed_link(pdev->dev.of_node)) {
- ret = of_phy_register_fixed_link(pdev->dev.of_node);
- if (ret < 0) {
- dev_err(&pdev->dev, "bad fixed-link spec\n");
- goto err_free_bus;
- }
- priv->phy_node = of_node_get(pdev->dev.of_node);
- }
-
- if (!priv->phy_node)
- priv->phy_node = of_parse_phandle(pdev->dev.of_node,
- "phy-handle", 0);
-
- if (!priv->phy_node) {
- dev_err(&pdev->dev, "no PHY specified\n");
- ret = -ENODEV;
- goto err_free_bus;
- }
-
- priv->mii_bus = bus;
-
- ret = nb8800_hw_init(dev);
- if (ret)
- goto err_deregister_fixed_link;
-
- if (ops && ops->init) {
- ret = ops->init(dev);
- if (ret)
- goto err_deregister_fixed_link;
- }
-
- dev->netdev_ops = &nb8800_netdev_ops;
- dev->ethtool_ops = &nb8800_ethtool_ops;
- dev->flags |= IFF_MULTICAST;
- dev->irq = irq;
-
- mac = of_get_mac_address(pdev->dev.of_node);
- if (!IS_ERR(mac))
- ether_addr_copy(dev->dev_addr, mac);
-
- if (!is_valid_ether_addr(dev->dev_addr))
- eth_hw_addr_random(dev);
-
- nb8800_update_mac_addr(dev);
-
- netif_carrier_off(dev);
-
- ret = register_netdev(dev);
- if (ret) {
- netdev_err(dev, "failed to register netdev\n");
- goto err_free_dma;
- }
-
- netif_napi_add(dev, &priv->napi, nb8800_poll, NAPI_POLL_WEIGHT);
-
- netdev_info(dev, "MAC address %pM\n", dev->dev_addr);
-
- return 0;
-
-err_free_dma:
- nb8800_dma_free(dev);
-err_deregister_fixed_link:
- if (of_phy_is_fixed_link(pdev->dev.of_node))
- of_phy_deregister_fixed_link(pdev->dev.of_node);
-err_free_bus:
- of_node_put(priv->phy_node);
- mdiobus_unregister(bus);
-err_disable_clk:
- clk_disable_unprepare(priv->clk);
-err_free_dev:
- free_netdev(dev);
-
- return ret;
-}
-
-static int nb8800_remove(struct platform_device *pdev)
-{
- struct net_device *ndev = platform_get_drvdata(pdev);
- struct nb8800_priv *priv = netdev_priv(ndev);
-
- unregister_netdev(ndev);
- if (of_phy_is_fixed_link(pdev->dev.of_node))
- of_phy_deregister_fixed_link(pdev->dev.of_node);
- of_node_put(priv->phy_node);
-
- mdiobus_unregister(priv->mii_bus);
-
- clk_disable_unprepare(priv->clk);
-
- nb8800_dma_free(ndev);
- free_netdev(ndev);
-
- return 0;
-}
-
-static struct platform_driver nb8800_driver = {
- .driver = {
- .name = "nb8800",
- .of_match_table = nb8800_dt_ids,
- },
- .probe = nb8800_probe,
- .remove = nb8800_remove,
-};
-
-module_platform_driver(nb8800_driver);
-
-MODULE_DESCRIPTION("Aurora AU-NB8800 Ethernet driver");
-MODULE_AUTHOR("Mans Rullgard <mans@mansr.com>");
-MODULE_LICENSE("GPL");
projects / kernel.git / commitdiff