* [PATCH v3 2/2] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller
2015-10-26 21:34 [PATCH v3 1/2] devicetree: add binding for Aurora VLSI NB8800 Ethernet controller Mans Rullgard
@ 2015-10-26 21:34 ` Mans Rullgard
2015-10-27 6:02 ` Stephen Hemminger
2015-10-26 21:40 ` [PATCH v3 1/2] devicetree: add binding " Måns Rullgård
2015-11-12 14:44 ` Rob Herring
2 siblings, 1 reply; 6+ messages in thread
From: Mans Rullgard @ 2015-10-26 21:34 UTC (permalink / raw)
To: linux-kernel, netdev; +Cc: slash.tmp
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@mansr.com>
---
Changes:
- remove check for wake on lan irq as it is never requested
- prettify mac address setting
- use ethtool_op_get_link()
- use hardware statistics counters
- check for dma mapping errors
- drop bogus netdev_mc_count(dev) > 64 check
- move request_irq to ndo_open callback
- drop tx_queue_len override
- remove batched tx descriptor cleanup
- use bool type as appropriate
- set the IC_THRESHOLD register correctly according to documentation
- set the RX_ITR and TX_ITR registers to better values improving performance
- move phy_connect to ndo_open callback
- get phy information from devicetree
- move dma buffer allocation to ndo_open callback
- anything I forgot to mention
---
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 | 1118 ++++++++++++++++++++++++++++++++++
drivers/net/ethernet/aurora/nb8800.h | 229 +++++++
6 files changed, 1370 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..b546b67
--- /dev/null
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -0,0 +1,1118 @@
+/*
+ * 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>
+ *
+ * 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 = RX_BUF_SIZE | DESC_BTS(2) | DESC_DS | DESC_EOF;
+ 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, int new)
+{
+ struct nb8800_priv *priv = netdev_priv(dev);
+ struct nb8800_dma_desc *tx;
+ struct tx_buf *tx_buf;
+ u32 txc_cr;
+ int next;
+
+ next = xchg(&priv->tx_pending, -1);
+ if (next < 0)
+ next = new;
+ if (next < 0)
+ goto end;
+
+ txc_cr = nb8800_readl(priv, NB8800_TXC_CR) & 0xffff;
+ if (txc_cr & TCR_EN)
+ goto end;
+
+ tx = &priv->tx_descs[next];
+ tx_buf = &priv->tx_bufs[next];
+
+ next = (next + tx_buf->frags) & (TX_DESC_COUNT - 1);
+
+ 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);
+
+ if (!priv->tx_bufs[next].frags)
+ next = -1;
+
+end:
+ priv->tx_pending = next;
+}
+
+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;
+ atomic_sub(frags, &priv->tx_free);
+
+ 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, DESC_EOF | DESC_EOC);
+ netdev_sent_queue(dev, skb->len);
+
+ tx_buf->skb = skb;
+ tx_buf->frags = frags;
+
+ skb_data = (struct tx_skb_data *)skb->cb;
+ skb_data->dma_addr = dma_addr;
+ skb_data->dma_len = dma_len;
+
+ nb8800_tx_dma_start(dev, next);
+
+ if (atomic_read(&priv->tx_free) <= NB8800_DESC_LOW)
+ netif_stop_queue(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;
+
+ priv->tx_done = (priv->tx_done + tx_buf->frags) & (TX_DESC_COUNT - 1);
+
+ 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(tx_buf->frags, &priv->tx_free);
+
+ tx_buf->skb = NULL;
+ tx_buf->frags = 0;
+
+ nb8800_tx_dma_start(dev, -1);
+ 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))
+ 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)) {
+ 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_pending = -1;
+ 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 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 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 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 const struct of_device_id nb8800_dt_ids[] = {
+ {
+ .compatible = "aurora,nb8800",
+ },
+ {
+ .compatible = "sigma,smp8642-ethernet",
+ .data = &nb8800_tangox_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;
+
+ 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;
+
+ if (ops && ops->init)
+ ops->init(dev);
+
+ ret = nb8800_hw_init(dev);
+ if (ret)
+ goto err_free_bus;
+
+ 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..5cf8222
--- /dev/null
+++ b/drivers/net/ethernet/aurora/nb8800.h
@@ -0,0 +1,229 @@
+#ifndef _NB8800_H_
+#define _NB8800_H_
+
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/phy.h>
+#include <linux/clk.h>
+#include <linux/timer.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;
+
+ struct nb8800_dma_desc *tx_descs;
+ struct tx_buf *tx_bufs;
+ atomic_t tx_free;
+ u32 tx_pending;
+ u16 tx_next;
+ u16 tx_done;
+
+ 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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