[PATCH v4] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller
From: Mans Rullgard
Date: Thu Oct 29 2015 - 12:49:24 EST
This adds a driver for the Aurora VLSI NB8800 Ethernet controller.
It is an almost complete rewrite of a driver originally found in
a Sigma Designs 2.6.22 tree.
Signed-off-by: Mans Rullgard <mans@xxxxxxxxx>
---
Changes:
- Make ethtool_ops const
- Fix race in tx path on smp systems
- Use different interrupt method on tango4
For whatever reason the old method is unreliable on tango4 and the
new one doesn't work at all on tango3. Possibly the tango4 version
should be used by default and overridden only for tango3; I don't
have any other hardware to test with. This version of the driver
appears to be stable on both SMP8642 (tango3) and SMP8759 (tango4).
---
drivers/net/ethernet/Kconfig | 1 +
drivers/net/ethernet/Makefile | 1 +
drivers/net/ethernet/aurora/Kconfig | 20 +
drivers/net/ethernet/aurora/Makefile | 1 +
drivers/net/ethernet/aurora/nb8800.c | 1146 ++++++++++++++++++++++++++++++++++
drivers/net/ethernet/aurora/nb8800.h | 230 +++++++
6 files changed, 1399 insertions(+)
create mode 100644 drivers/net/ethernet/aurora/Kconfig
create mode 100644 drivers/net/ethernet/aurora/Makefile
create mode 100644 drivers/net/ethernet/aurora/nb8800.c
create mode 100644 drivers/net/ethernet/aurora/nb8800.h
diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index 05aa759..8310163 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -29,6 +29,7 @@ source "drivers/net/ethernet/apm/Kconfig"
source "drivers/net/ethernet/apple/Kconfig"
source "drivers/net/ethernet/arc/Kconfig"
source "drivers/net/ethernet/atheros/Kconfig"
+source "drivers/net/ethernet/aurora/Kconfig"
source "drivers/net/ethernet/cadence/Kconfig"
source "drivers/net/ethernet/adi/Kconfig"
source "drivers/net/ethernet/broadcom/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index ddfc808..b435fb0 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_NET_XGENE) += apm/
obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
obj-$(CONFIG_NET_VENDOR_ARC) += arc/
obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
+obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
obj-$(CONFIG_NET_CADENCE) += cadence/
obj-$(CONFIG_NET_BFIN) += adi/
obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
diff --git a/drivers/net/ethernet/aurora/Kconfig b/drivers/net/ethernet/aurora/Kconfig
new file mode 100644
index 0000000..a3c7106
--- /dev/null
+++ b/drivers/net/ethernet/aurora/Kconfig
@@ -0,0 +1,20 @@
+config NET_VENDOR_AURORA
+ bool "Aurora VLSI devices"
+ help
+ If you have a network (Ethernet) device belonging to this class,
+ say Y.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ questions about Aurora devices. If you say Y, you will be asked
+ for your specific device in the following questions.
+
+if NET_VENDOR_AURORA
+
+config AURORA_NB8800
+ tristate "Aurora AU-NB8800 support"
+ select PHYLIB
+ help
+ Support for the AU-NB8800 gigabit Ethernet controller.
+
+endif
diff --git a/drivers/net/ethernet/aurora/Makefile b/drivers/net/ethernet/aurora/Makefile
new file mode 100644
index 0000000..6cb528a
--- /dev/null
+++ b/drivers/net/ethernet/aurora/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_AURORA_NB8800) += nb8800.o
diff --git a/drivers/net/ethernet/aurora/nb8800.c b/drivers/net/ethernet/aurora/nb8800.c
new file mode 100644
index 0000000..ce61439
--- /dev/null
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -0,0 +1,1146 @@
+/*
+ * Copyright (C) 2015 Mans Rullgard <mans@xxxxxxxxx>
+ *
+ * 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@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#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 <asm/barrier.h>
+
+#include "nb8800.h"
+
+static inline u8 nb8800_readb(struct nb8800_priv *priv, int reg)
+{
+ return readb(priv->base + reg);
+}
+
+static inline u32 nb8800_readl(struct nb8800_priv *priv, int reg)
+{
+ return readl(priv->base + reg);
+}
+
+static inline void nb8800_writeb(struct nb8800_priv *priv, int reg, u8 val)
+{
+ writeb(val, priv->base + reg);
+}
+
+static inline void nb8800_writew(struct nb8800_priv *priv, int reg, u16 val)
+{
+ writew(val, priv->base + reg);
+}
+
+static inline void nb8800_writel(struct nb8800_priv *priv, int reg, u32 val)
+{
+ writel(val, priv->base + reg);
+}
+
+#define nb8800_set_bits(sz, priv, reg, bits) do { \
+ u32 __o = nb8800_read##sz(priv, reg); \
+ u32 __n = __o | (bits); \
+ if (__n != __o) \
+ nb8800_write##sz(priv, reg, __n); \
+ } while (0)
+
+#define nb8800_clear_bits(sz, priv, reg, bits) do { \
+ u32 __o = nb8800_read##sz(priv, reg); \
+ u32 __n = __o & ~(bits); \
+ if (__n != __o) \
+ nb8800_write##sz(priv, reg, __n); \
+ } while (0)
+
+#define MDIO_TIMEOUT 1000
+
+static int nb8800_mdio_wait(struct mii_bus *bus)
+{
+ struct nb8800_priv *priv = bus->priv;
+ int tmo = MDIO_TIMEOUT;
+
+ while (--tmo) {
+ if (!(nb8800_readl(priv, NB8800_MDIO_CMD) & MDIO_CMD_GO))
+ break;
+ udelay(1);
+ }
+
+ return tmo;
+}
+
+static int nb8800_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+ struct nb8800_priv *priv = bus->priv;
+ int val;
+
+ if (!nb8800_mdio_wait(bus))
+ return -ETIMEDOUT;
+
+ val = MIIAR_ADDR(phy_id) | MIIAR_REG(reg);
+
+ nb8800_writel(priv, NB8800_MDIO_CMD, val);
+ udelay(10);
+ nb8800_writel(priv, NB8800_MDIO_CMD, val | MDIO_CMD_GO);
+
+ if (!nb8800_mdio_wait(bus))
+ return -ETIMEDOUT;
+
+ 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)
+{
+ struct nb8800_priv *priv = bus->priv;
+ int tmp;
+
+ if (!nb8800_mdio_wait(bus))
+ return -ETIMEDOUT;
+
+ tmp = MIIAR_DATA(val) | MIIAR_ADDR(phy_id) | MIIAR_REG(reg) |
+ MDIO_CMD_WR;
+
+ nb8800_writel(priv, NB8800_MDIO_CMD, tmp);
+ udelay(10);
+ nb8800_writel(priv, NB8800_MDIO_CMD, tmp | MDIO_CMD_GO);
+
+ if (!nb8800_mdio_wait(bus))
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+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();
+
+ if (enable)
+ nb8800_set_bits(b, priv, NB8800_TX_CTL1, TX_EN);
+ else
+ nb8800_clear_bits(b, priv, NB8800_TX_CTL1, TX_EN);
+}
+
+static void nb8800_mac_rx(struct net_device *dev, bool enable)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ if (enable)
+ nb8800_set_bits(b, priv, NB8800_RX_CTL, RX_EN);
+ else
+ nb8800_clear_bits(b, priv, NB8800_RX_CTL, RX_EN);
+}
+
+static void nb8800_mac_af(struct net_device *dev, bool enable)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ if (enable)
+ nb8800_set_bits(b, priv, NB8800_RX_CTL, RX_AF_EN);
+ else
+ nb8800_clear_bits(b, priv, NB8800_RX_CTL, RX_AF_EN);
+}
+
+static void nb8800_stop_rx(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ int i;
+
+ for (i = 0; i < RX_DESC_COUNT; i++)
+ priv->rx_descs[i].config |= DESC_EOC;
+
+ while (nb8800_readl(priv, NB8800_RXC_CR) & RCR_EN)
+ usleep_range(1000, 10000);
+}
+
+static void nb8800_start_rx(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ nb8800_set_bits(l, priv, NB8800_RXC_CR, RCR_EN);
+}
+
+static int nb8800_alloc_rx(struct net_device *dev, int i, bool napi)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct nb8800_dma_desc *rx = &priv->rx_descs[i];
+ struct rx_buf *buf = &priv->rx_bufs[i];
+ int size = L1_CACHE_ALIGN(RX_BUF_SIZE);
+ void *data;
+
+ data = napi ? napi_alloc_frag(size) : netdev_alloc_frag(size);
+ if (!data) {
+ buf->page = NULL;
+ rx->config = DESC_EOF;
+ return -ENOMEM;
+ }
+
+ buf->page = virt_to_head_page(data);
+ buf->offset = data - page_address(buf->page);
+
+ rx->config = priv->rx_dma_config;
+ rx->s_addr = dma_map_page(&dev->dev, buf->page, buf->offset,
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+
+ if (dma_mapping_error(&dev->dev, rx->s_addr)) {
+ skb_free_frag(data);
+ buf->page = NULL;
+ rx->config = DESC_EOF;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void nb8800_receive(struct net_device *dev, int i, int len)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct nb8800_dma_desc *rx = &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 = rx->s_addr;
+ struct sk_buff *skb;
+
+ skb = napi_alloc_skb(&priv->napi, RX_COPYBREAK);
+ if (!skb) {
+ netdev_err(dev, "rx skb allocation failed\n");
+ return;
+ }
+
+ if (len <= RX_COPYBREAK) {
+ dma_sync_single_for_cpu(&dev->dev, dma, len, DMA_FROM_DEVICE);
+ memcpy(skb_put(skb, len), data, len);
+ dma_sync_single_for_device(&dev->dev, dma, len,
+ DMA_FROM_DEVICE);
+ } else {
+ dma_unmap_page(&dev->dev, dma, RX_BUF_SIZE, DMA_FROM_DEVICE);
+ memcpy(skb_put(skb, 128), data, 128);
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
+ offset + 128, len - 128, RX_BUF_SIZE);
+ priv->rx_bufs[i].page = NULL;
+ }
+
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_receive_skb(skb);
+}
+
+static void nb8800_rx_error(struct net_device *dev, u32 report)
+{
+ int len = RX_BYTES_TRANSFERRED(report);
+
+ if (report & RX_FCS_ERR)
+ dev->stats.rx_crc_errors++;
+
+ if ((report & (RX_FRAME_LEN_ERROR | RX_LENGTH_ERR)) ||
+ (len > RX_BUF_SIZE))
+ dev->stats.rx_length_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_dma_desc *rx;
+ int work = 0;
+ int last = priv->rx_eoc;
+ int next;
+
+ while (work < budget) {
+ struct rx_buf *rx_buf;
+ u32 report;
+ int len;
+
+ next = (last + 1) & (RX_DESC_COUNT - 1);
+
+ rx_buf = &priv->rx_bufs[next];
+ rx = &priv->rx_descs[next];
+ report = rx->report;
+
+ if (!report)
+ break;
+
+ if (IS_RX_ERROR(report)) {
+ nb8800_rx_error(dev, report);
+ } else if (likely(rx_buf->page)) {
+ len = RX_BYTES_TRANSFERRED(report);
+ nb8800_receive(dev, next, len);
+ }
+
+ rx->report = 0;
+ if (!rx_buf->page)
+ nb8800_alloc_rx(dev, next, true);
+
+ last = next;
+ work++;
+ }
+
+ if (work) {
+ priv->rx_descs[last].config |= DESC_EOC;
+ wmb(); /* ensure new EOC is written before clearing old */
+ priv->rx_descs[priv->rx_eoc].config &= ~DESC_EOC;
+ priv->rx_eoc = last;
+ nb8800_start_rx(dev);
+ }
+
+ if (work < budget) {
+ nb8800_writel(priv, NB8800_RX_ITR, 1);
+ napi_complete_done(napi, work);
+ }
+
+ return work;
+}
+
+static void nb8800_tx_dma_queue(struct net_device *dev, dma_addr_t data,
+ int len, int flags)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ int next = priv->tx_next;
+ struct nb8800_dma_desc *tx = &priv->tx_descs[next];
+
+ tx->s_addr = data;
+ tx->config = DESC_BTS(2) | DESC_DS | flags | len;
+ tx->report = 0;
+
+ priv->tx_next = (next + 1) & (TX_DESC_COUNT - 1);
+}
+
+static void nb8800_tx_dma_start(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct tx_buf *tx_buf;
+ u32 txc_cr;
+
+ if (xchg(&priv->tx_lock, 1))
+ return;
+
+ txc_cr = nb8800_readl(priv, NB8800_TXC_CR) & 0xffff;
+ if (txc_cr & TCR_EN)
+ goto end;
+
+ tx_buf = &priv->tx_bufs[priv->tx_done];
+ if (!tx_buf->frags)
+ goto end;
+
+ nb8800_writel(priv, NB8800_TX_DESC_ADDR, tx_buf->desc_dma);
+ wmb(); /* ensure desc addr is written before starting DMA */
+ nb8800_writel(priv, NB8800_TXC_CR, txc_cr | TCR_EN);
+
+end:
+ priv->tx_lock = 0;
+}
+
+static int nb8800_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct tx_skb_data *skb_data;
+ struct tx_buf *tx_buf;
+ dma_addr_t dma_addr;
+ unsigned int dma_len;
+ int cpsz, next;
+ int frags;
+
+ if (atomic_read(&priv->tx_free) <= NB8800_DESC_LOW) {
+ netif_stop_queue(dev);
+ return NETDEV_TX_BUSY;
+ }
+
+ cpsz = (8 - (uintptr_t)skb->data) & 7;
+
+ dma_len = skb->len - cpsz;
+ dma_addr = dma_map_single(&dev->dev, skb->data + cpsz,
+ dma_len, DMA_TO_DEVICE);
+
+ if (dma_mapping_error(&dev->dev, dma_addr)) {
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ frags = cpsz ? 2 : 1;
+
+ if (atomic_sub_return(frags, &priv->tx_free) <= NB8800_DESC_LOW)
+ netif_stop_queue(dev);
+
+ next = priv->tx_next;
+ tx_buf = &priv->tx_bufs[next];
+
+ if (cpsz) {
+ dma_addr_t dma = tx_buf->desc_dma +
+ offsetof(struct nb8800_dma_desc, buf);
+ memcpy(priv->tx_descs[next].buf, skb->data, cpsz);
+ nb8800_tx_dma_queue(dev, dma, cpsz, 0);
+ }
+
+ nb8800_tx_dma_queue(dev, dma_addr, dma_len, priv->tx_dma_config);
+
+ skb_data = (struct tx_skb_data *)skb->cb;
+ skb_data->dma_addr = dma_addr;
+ skb_data->dma_len = dma_len;
+
+ tx_buf->skb = skb;
+
+ smp_wmb();
+ tx_buf->frags = frags;
+
+ netdev_sent_queue(dev, skb->len);
+
+ if (!skb->xmit_more)
+ nb8800_tx_dma_start(dev);
+
+ return NETDEV_TX_OK;
+}
+
+static void nb8800_tx_done(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct tx_buf *tx_buf = &priv->tx_bufs[priv->tx_done];
+ struct sk_buff *skb = tx_buf->skb;
+ struct tx_skb_data *skb_data = (struct tx_skb_data *)skb->cb;
+ int frags = tx_buf->frags;
+
+ netdev_completed_queue(dev, 1, skb->len);
+ dma_unmap_single(&dev->dev, skb_data->dma_addr, skb_data->dma_len,
+ DMA_TO_DEVICE);
+ dev_consume_skb_irq(tx_buf->skb);
+
+ atomic_add(frags, &priv->tx_free);
+
+ tx_buf->skb = NULL;
+ tx_buf->frags = 0;
+
+ smp_wmb();
+
+ priv->tx_done = (priv->tx_done + frags) & (TX_DESC_COUNT - 1);
+
+ nb8800_tx_dma_start(dev);
+ netif_wake_queue(dev);
+}
+
+static irqreturn_t nb8800_isr(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct nb8800_priv *priv = netdev_priv(dev);
+ u32 val;
+
+ /* tx interrupt */
+ val = nb8800_readl(priv, NB8800_TXC_SR);
+ if (val) {
+ nb8800_writel(priv, NB8800_TXC_SR, val);
+
+ if (likely(val & (TSR_TI | TSR_DI)))
+ nb8800_tx_done(dev);
+
+ if (unlikely(val & TSR_DE))
+ netdev_err(dev, "TX DMA error\n");
+
+ if (unlikely(val & TSR_TO))
+ netdev_err(dev, "TX Status FIFO overflow\n");
+ }
+
+ /* 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_poll_itr);
+ napi_schedule_irqoff(&priv->napi);
+ }
+
+ if (unlikely(val & RSR_DE))
+ netdev_err(dev, "RX DMA error\n");
+
+ if (unlikely(val & RSR_RO)) {
+ int i;
+
+ netdev_err(dev, "RX Status FIFO overflow\n");
+
+ for (i = 0; i < 4; i++)
+ nb8800_readl(priv, NB8800_RX_FIFO_SR);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void nb8800_mac_config(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ unsigned phy_clk;
+ unsigned ict;
+
+ if (priv->duplex)
+ nb8800_clear_bits(b, priv, NB8800_MAC_MODE, HALF_DUPLEX);
+ else
+ nb8800_set_bits(b, priv, NB8800_MAC_MODE, HALF_DUPLEX);
+
+ if (priv->speed == SPEED_1000) {
+ nb8800_set_bits(b, priv, NB8800_MAC_MODE,
+ RGMII_MODE | GMAC_MODE);
+ nb8800_writeb(priv, NB8800_SLOT_TIME, 255);
+ phy_clk = 125000000;
+ } else {
+ nb8800_clear_bits(b, priv, NB8800_MAC_MODE,
+ RGMII_MODE | GMAC_MODE);
+ nb8800_writeb(priv, NB8800_SLOT_TIME, 127);
+ phy_clk = 25000000;
+ }
+
+ ict = DIV_ROUND_UP(phy_clk, clk_get_rate(priv->clk));
+ nb8800_writeb(priv, NB8800_IC_THRESHOLD, ict);
+}
+
+static void nb8800_link_reconfigure(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct phy_device *phydev = priv->phydev;
+
+ if (phydev->speed == priv->speed && phydev->duplex == priv->duplex &&
+ phydev->link == priv->link)
+ return;
+
+ if (phydev->link != priv->link || phydev->link)
+ phy_print_status(priv->phydev);
+
+ priv->speed = phydev->speed;
+ priv->duplex = phydev->duplex;
+ priv->link = phydev->link;
+
+ if (priv->link)
+ nb8800_mac_config(dev);
+}
+
+static void nb8800_update_mac_addr(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ int i;
+
+ for (i = 0; i < 6; i++)
+ nb8800_writeb(priv, NB8800_SRC_ADDR(i), dev->dev_addr[i]);
+
+ for (i = 0; i < 6; 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);
+ while (nb8800_readb(priv, NB8800_MC_INIT))
+ cpu_relax();
+}
+
+static void nb8800_set_rx_mode(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct netdev_hw_addr *ha;
+ bool af_en;
+ int i;
+
+ if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI))
+ af_en = false;
+ else
+ af_en = true;
+
+ nb8800_mac_af(dev, af_en);
+
+ if (!af_en)
+ return;
+
+ nb8800_mc_init(dev, 0);
+
+ netdev_for_each_mc_addr(ha, dev) {
+ char *addr = ha->addr;
+
+ for (i = 0; i < 6; i++)
+ nb8800_writeb(priv, NB8800_MC_ADDR(i), addr[i]);
+
+ nb8800_mc_init(dev, 0xff);
+ }
+}
+
+#define RX_DESC_SIZE (RX_DESC_COUNT * sizeof(struct nb8800_dma_desc))
+#define TX_DESC_SIZE (TX_DESC_COUNT * sizeof(struct nb8800_dma_desc))
+
+static void nb8800_dma_free(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ 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 int nb8800_dma_init(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ int n_rx = RX_DESC_COUNT;
+ int n_tx = TX_DESC_COUNT;
+ int i;
+
+ 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++) {
+ struct nb8800_dma_desc *rx = &priv->rx_descs[i];
+ dma_addr_t rx_dma;
+ int err;
+
+ rx_dma = priv->rx_desc_dma + i * sizeof(struct nb8800_dma_desc);
+ rx->n_addr = rx_dma + sizeof(struct nb8800_dma_desc);
+ rx->r_addr = rx_dma + offsetof(struct nb8800_dma_desc, report);
+ rx->report = 0;
+
+ err = nb8800_alloc_rx(dev, i, false);
+ if (err)
+ goto err_out;
+ }
+
+ priv->rx_descs[n_rx - 1].n_addr = priv->rx_desc_dma;
+ priv->rx_descs[n_rx - 1].config |= DESC_EOC;
+
+ priv->rx_eoc = RX_DESC_COUNT - 1;
+
+ 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++) {
+ struct nb8800_dma_desc *tx = &priv->tx_descs[i];
+ dma_addr_t tx_dma;
+
+ tx_dma = priv->tx_desc_dma + i * sizeof(struct nb8800_dma_desc);
+ tx->n_addr = tx_dma + sizeof(struct nb8800_dma_desc);
+ tx->r_addr = tx_dma + offsetof(struct nb8800_dma_desc, report);
+
+ priv->tx_bufs[i].desc_dma = tx_dma;
+ }
+
+ priv->tx_descs[n_tx - 1].n_addr = priv->tx_desc_dma;
+
+ priv->tx_next = 0;
+ priv->tx_done = 0;
+ atomic_set(&priv->tx_free, TX_DESC_COUNT);
+
+ nb8800_writel(priv, NB8800_TX_DESC_ADDR, priv->tx_desc_dma);
+ nb8800_writel(priv, NB8800_RX_DESC_ADDR, priv->rx_desc_dma);
+
+ wmb(); /* ensure all setup is written before starting */
+
+ return 0;
+
+err_out:
+ nb8800_dma_free(dev);
+
+ return -ENOMEM;
+}
+
+static int nb8800_open(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ int err;
+
+ 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_isr, 0, dev_name(&dev->dev), dev);
+ if (err)
+ goto err_free_dma;
+
+ nb8800_mac_rx(dev, true);
+ nb8800_mac_tx(dev, true);
+
+ priv->phydev = of_phy_connect(dev, priv->phy_node,
+ nb8800_link_reconfigure, 0,
+ priv->phy_mode);
+ if (!priv->phydev)
+ goto err_free_irq;
+
+ napi_enable(&priv->napi);
+ netif_start_queue(dev);
+
+ nb8800_start_rx(dev);
+ phy_start(priv->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);
+
+ netif_stop_queue(dev);
+ napi_disable(&priv->napi);
+
+ nb8800_stop_rx(dev);
+
+ nb8800_mac_rx(dev, false);
+ nb8800_mac_tx(dev, false);
+
+ free_irq(dev->irq, dev);
+
+ phy_stop(priv->phydev);
+ phy_disconnect(priv->phydev);
+
+ nb8800_dma_free(dev);
+
+ return 0;
+}
+
+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 struct net_device_stats *nb8800_get_stats(struct net_device *dev)
+{
+ dev->stats.rx_bytes = nb8800_read_stat(dev, 0x00);
+ dev->stats.rx_packets = nb8800_read_stat(dev, 0x01);
+ dev->stats.multicast = nb8800_read_stat(dev, 0x0d);
+ dev->stats.tx_bytes = nb8800_read_stat(dev, 0x80);
+ dev->stats.tx_packets = nb8800_read_stat(dev, 0x81);
+
+ return &dev->stats;
+}
+
+static int nb8800_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ return phy_mii_ioctl(priv->phydev, rq, cmd);
+}
+
+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 = nb8800_ioctl,
+ .ndo_get_stats = nb8800_get_stats,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int nb8800_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ return phy_ethtool_gset(priv->phydev, cmd);
+}
+
+static int nb8800_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ return phy_ethtool_sset(priv->phydev, cmd);
+}
+
+static int nb8800_nway_reset(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+
+ return genphy_restart_aneg(priv->phydev);
+}
+
+static const struct ethtool_ops nb8800_ethtool_ops = {
+ .get_settings = nb8800_get_settings,
+ .set_settings = nb8800_set_settings,
+ .nway_reset = nb8800_nway_reset,
+ .get_link = ethtool_op_get_link,
+};
+
+static int nb8800_hw_init(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ unsigned int val = 0;
+
+ nb8800_writeb(priv, NB8800_RANDOM_SEED, 0x08);
+
+ /* TX single deferral params */
+ nb8800_writeb(priv, NB8800_TX_SDP, 0xc);
+
+ /* Threshold for partial full */
+ nb8800_writeb(priv, NB8800_PF_THRESHOLD, 0xff);
+
+ /* Pause Quanta */
+ nb8800_writeb(priv, NB8800_PQ1, 0xff);
+ nb8800_writeb(priv, NB8800_PQ2, 0xff);
+
+ /* configure TX DMA Channels */
+ val = nb8800_readl(priv, NB8800_TXC_CR);
+ val &= TCR_LE;
+ val |= TCR_DM | TCR_RS | TCR_TFI(1) | TCR_BTS(2);
+ nb8800_writel(priv, NB8800_TXC_CR, val);
+
+ /* TX Interrupt Time Register */
+ nb8800_writel(priv, NB8800_TX_ITR, 1);
+
+ /* configure RX DMA Channels */
+ val = nb8800_readl(priv, NB8800_RXC_CR);
+ val &= RCR_LE;
+ val |= RCR_DM | RCR_RS | RCR_RFI(7) | RCR_BTS(2) | RCR_FL;
+ nb8800_writel(priv, NB8800_RXC_CR, val);
+
+ /* RX Interrupt Time Register */
+ nb8800_writel(priv, NB8800_RX_ITR, 1);
+
+ 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_PAUSE_EN | RX_AF_EN | RX_RUNT;
+ nb8800_writeb(priv, NB8800_RX_CTL, val);
+
+ nb8800_mc_init(dev, 0);
+
+ nb8800_writeb(priv, NB8800_TX_BUFSIZE, 0xff);
+
+ return 0;
+}
+
+static void nb8800_tangox_init(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ u32 val;
+
+ val = nb8800_readb(priv, NB8800_TANGOX_PAD_MODE) & 0x78;
+ if (priv->phy_mode == PHY_INTERFACE_MODE_RGMII)
+ val |= 1;
+ nb8800_writeb(priv, NB8800_TANGOX_PAD_MODE, val);
+}
+
+static void 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);
+}
+
+static const struct nb8800_ops nb8800_tangox_ops = {
+ .init = nb8800_tangox_init,
+ .reset = nb8800_tangox_reset,
+};
+
+static void nb8800_tango4_init(struct net_device *dev)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ u32 val;
+
+ nb8800_tangox_init(dev);
+
+ val = nb8800_readl(priv, NB8800_RXC_CR);
+ val &= ~RCR_RFI(7);
+ val |= RCR_DIE;
+ nb8800_writel(priv, NB8800_RXC_CR, val);
+
+ val = nb8800_readl(priv, NB8800_TXC_CR);
+ val &= ~TCR_TFI(7);
+ val |= TCR_DIE;
+ nb8800_writel(priv, NB8800_TXC_CR, val);
+
+ priv->rx_dma_config |= DESC_ID;
+ priv->tx_dma_config |= DESC_ID;
+}
+
+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,
+ },
+ { }
+};
+
+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;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "No MMIO base\n");
+ return -EINVAL;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(&pdev->dev, "No IRQ\n");
+ return -EINVAL;
+ }
+
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ dev_info(&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;
+
+ priv->phy_mode = of_get_phy_mode(pdev->dev.of_node);
+ if (priv->phy_mode < 0)
+ 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;
+
+ priv->rx_poll_itr = clk_get_rate(priv->clk) / 1000;
+ priv->rx_dma_config = RX_BUF_SIZE | DESC_BTS(2) | DESC_DS | DESC_EOF;
+ priv->tx_dma_config = DESC_EOF | DESC_EOC;
+
+ if (ops && ops->reset)
+ ops->reset(dev);
+
+ 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, "%.*s-mii", MII_BUS_ID_SIZE - 5,
+ pdev->name);
+ 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;
+ }
+
+ 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_free_bus;
+
+ if (ops && ops->init)
+ ops->init(dev);
+
+ 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 (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_free_bus:
+ 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);
+
+ 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_LICENSE("GPL");
diff --git a/drivers/net/ethernet/aurora/nb8800.h b/drivers/net/ethernet/aurora/nb8800.h
new file mode 100644
index 0000000..d99236e
--- /dev/null
+++ b/drivers/net/ethernet/aurora/nb8800.h
@@ -0,0 +1,230 @@
+#ifndef _NB8800_H_
+#define _NB8800_H_
+
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/phy.h>
+#include <linux/clk.h>
+#include <linux/bitops.h>
+
+#define RX_DESC_COUNT 256
+#define TX_DESC_COUNT 256
+
+#define NB8800_DESC_LOW 4
+
+#define RX_BUF_SIZE 1552
+#define TX_BUF_SIZE 1552
+
+#define RX_COPYBREAK 256
+
+#define MAX_MDC_CLOCK 2500000
+
+/* register offsets */
+#define NB8800_TX_CTL1 0x00
+#define TX_TPD BIT(5)
+#define TX_APPEND_FCS BIT(4)
+#define TX_PAD_EN BIT(3)
+#define TX_RETRY_EN BIT(2)
+#define TX_EN BIT(0)
+
+#define NB8800_TX_CTL2 0x01
+
+#define NB8800_RX_CTL 0x04
+#define RX_BC_DISABLE BIT(7)
+#define RX_RUNT BIT(6)
+#define RX_AF_EN BIT(5)
+#define RX_PAUSE_EN BIT(3)
+#define RX_SEND_CRC BIT(2)
+#define RX_PAD_STRIP BIT(1)
+#define RX_EN BIT(0)
+
+#define NB8800_RANDOM_SEED 0x8
+#define NB8800_TX_SDP 0x14
+#define NB8800_TX_TPDP1 0x18
+#define NB8800_TX_TPDP2 0x19
+#define NB8800_SLOT_TIME 0x1c
+
+#define NB8800_MDIO_CMD 0x20
+#define MIIAR_ADDR(x) ((x) << 21)
+#define MIIAR_REG(x) ((x) << 16)
+#define MIIAR_DATA(x) ((x) << 0)
+#define MDIO_CMD_GO BIT(31)
+#define MDIO_CMD_WR BIT(26)
+
+#define NB8800_MDIO_STS 0x24
+#define MDIO_STS_ERR BIT(31)
+
+#define NB8800_MC_ADDR(i) (0x28 + (i))
+#define NB8800_MC_INIT 0x2e
+#define NB8800_UC_ADDR(i) (0x3c + (i))
+
+#define NB8800_MAC_MODE 0x44
+#define RGMII_MODE BIT(7)
+#define HALF_DUPLEX BIT(4)
+#define BURST_EN BIT(3)
+#define LOOPBACK_EN BIT(2)
+#define GMAC_MODE BIT(0)
+
+#define NB8800_IC_THRESHOLD 0x50
+#define NB8800_PE_THRESHOLD 0x51
+#define NB8800_PF_THRESHOLD 0x52
+#define NB8800_TX_BUFSIZE 0x54
+#define NB8800_FIFO_CTL 0x56
+#define NB8800_PQ1 0x60
+#define NB8800_PQ2 0x61
+#define NB8800_SRC_ADDR(i) (0x6a + (i))
+#define NB8800_STAT_DATA 0x78
+#define NB8800_STAT_INDEX 0x7c
+#define NB8800_STAT_CLEAR 0x7d
+
+#define NB8800_SLEEP_MODE 0x7e
+#define SLEEP_MODE BIT(0)
+
+#define NB8800_WAKEUP 0x7f
+#define WAKEUP BIT(0)
+
+#define NB8800_TXC_CR 0x100
+#define TCR_LK BIT(12)
+#define TCR_DS BIT(11)
+#define TCR_BTS(x) (((x) & 0x7) << 8)
+#define TCR_DIE BIT(7)
+#define TCR_TFI(x) (((x) & 0x7) << 4)
+#define TCR_LE BIT(3)
+#define TCR_RS BIT(2)
+#define TCR_DM BIT(1)
+#define TCR_EN BIT(0)
+
+#define NB8800_TXC_SR 0x104
+#define TSR_DE BIT(3)
+#define TSR_DI BIT(2)
+#define TSR_TO BIT(1)
+#define TSR_TI BIT(0)
+
+#define NB8800_TX_SAR 0x108
+#define NB8800_TX_DESC_ADDR 0x10c
+
+#define NB8800_TX_REPORT_ADDR 0x110
+#define TX_BYTES_TRASFERRED(x) (((x) >> 16) & 0xffff)
+#define TX_FIRST_DEFERRAL BIT(7)
+#define TX_EARLY_COLLISIONS(x) (((x) >> 3) & 0xf)
+#define TX_LATE_COLLISION BIT(2)
+#define TX_PACKET_DROPPED BIT(1)
+#define TX_FIFO_UNDERRUN BIT(0)
+#define IS_TX_ERROR(r) ((r) & 0x87)
+
+#define NB8800_TX_FIFO_SR 0x114
+#define NB8800_TX_ITR 0x118
+
+#define NB8800_RXC_CR 0x200
+#define RCR_FL BIT(13)
+#define RCR_LK BIT(12)
+#define RCR_DS BIT(11)
+#define RCR_BTS(x) (((x) & 7) << 8)
+#define RCR_DIE BIT(7)
+#define RCR_RFI(x) (((x) & 7) << 4)
+#define RCR_LE BIT(3)
+#define RCR_RS BIT(2)
+#define RCR_DM BIT(1)
+#define RCR_EN BIT(0)
+
+#define NB8800_RXC_SR 0x204
+#define RSR_DE BIT(3)
+#define RSR_DI BIT(2)
+#define RSR_RO BIT(1)
+#define RSR_RI BIT(0)
+
+#define NB8800_RX_SAR 0x208
+#define NB8800_RX_DESC_ADDR 0x20c
+
+#define NB8800_RX_REPORT_ADDR 0x210
+#define RX_BYTES_TRANSFERRED(x) (((x) >> 16) & 0xFFFF)
+#define RX_MULTICAST_PKT BIT(9)
+#define RX_BROADCAST_PKT BIT(8)
+#define RX_LENGTH_ERR BIT(7)
+#define RX_FCS_ERR BIT(6)
+#define RX_RUNT_PKT BIT(5)
+#define RX_FIFO_OVERRUN BIT(4)
+#define RX_LATE_COLLISION BIT(3)
+#define RX_FRAME_LEN_ERROR BIT(2)
+#define RX_ERROR_MASK 0xfc
+#define IS_RX_ERROR(r) ((r) & RX_ERROR_MASK)
+
+#define NB8800_RX_FIFO_SR 0x214
+#define NB8800_RX_ITR 0x218
+
+/* Sigma Designs SMP86xx additional registers */
+#define NB8800_TANGOX_PAD_MODE 0x400
+#define NB8800_TANGOX_MDIO_CLKDIV 0x420
+#define NB8800_TANGOX_RESET 0x424
+
+struct nb8800_dma_desc {
+ u32 s_addr;
+ u32 n_addr;
+ u32 r_addr;
+ u32 config;
+ u8 buf[12];
+ u32 report;
+};
+
+#define DESC_ID BIT(23)
+#define DESC_EOC BIT(22)
+#define DESC_EOF BIT(21)
+#define DESC_LK BIT(20)
+#define DESC_DS BIT(19)
+#define DESC_BTS(x) (((x) & 0x7) << 16)
+
+struct rx_buf {
+ struct page *page;
+ int offset;
+};
+
+struct tx_buf {
+ struct sk_buff *skb;
+ dma_addr_t desc_dma;
+ int frags;
+};
+
+struct tx_skb_data {
+ dma_addr_t dma_addr;
+ unsigned int dma_len;
+};
+
+struct nb8800_priv {
+ struct napi_struct napi;
+
+ void __iomem *base;
+
+ struct nb8800_dma_desc *rx_descs;
+ struct rx_buf *rx_bufs;
+ u16 rx_eoc;
+ u32 rx_poll_itr;
+ u32 rx_dma_config;
+
+ struct nb8800_dma_desc *tx_descs;
+ struct tx_buf *tx_bufs;
+ atomic_t tx_free;
+ u32 tx_dma_config;
+ u16 tx_next;
+ u16 tx_done;
+ u32 tx_lock;
+
+ struct mii_bus *mii_bus;
+ struct device_node *phy_node;
+ struct phy_device *phydev;
+ int phy_mode;
+ int speed;
+ int duplex;
+ int link;
+
+ dma_addr_t rx_desc_dma;
+ dma_addr_t tx_desc_dma;
+
+ struct clk *clk;
+};
+
+struct nb8800_ops {
+ void (*init)(struct net_device *dev);
+ void (*reset)(struct net_device *dev);
+};
+
+#endif /* _NB8800_H_ */
--
2.6.2
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