Re: [PATCH net-next] net: remove aurora nb8800 driver
From: Måns Rullgård
Date: Thu Jan 21 2021 - 09:00:21 EST
Arnd Bergmann <arnd@xxxxxxxxxx> writes:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> The tango4 platform is getting removed, and this driver has no
> other known users, so it can be removed.
>
> Cc: Marc Gonzalez <marc.w.gonzalez@xxxxxxx>
> Cc: Mans Rullgard <mans@xxxxxxxxx>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Mans Rullgard <mans@xxxxxxxxx>
> ---
> drivers/net/ethernet/Kconfig | 1 -
> drivers/net/ethernet/Makefile | 1 -
> drivers/net/ethernet/aurora/Kconfig | 23 -
> drivers/net/ethernet/aurora/Makefile | 2 -
> drivers/net/ethernet/aurora/nb8800.c | 1520 --------------------------
> drivers/net/ethernet/aurora/nb8800.h | 316 ------
> 6 files changed, 1863 deletions(-)
> delete mode 100644 drivers/net/ethernet/aurora/Kconfig
> delete mode 100644 drivers/net/ethernet/aurora/Makefile
> delete mode 100644 drivers/net/ethernet/aurora/nb8800.c
> delete mode 100644 drivers/net/ethernet/aurora/nb8800.h
>
> diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
> index de50e8b9e656..ad04660b97b8 100644
> --- a/drivers/net/ethernet/Kconfig
> +++ b/drivers/net/ethernet/Kconfig
> @@ -33,7 +33,6 @@ source "drivers/net/ethernet/apple/Kconfig"
> source "drivers/net/ethernet/aquantia/Kconfig"
> source "drivers/net/ethernet/arc/Kconfig"
> source "drivers/net/ethernet/atheros/Kconfig"
> -source "drivers/net/ethernet/aurora/Kconfig"
> source "drivers/net/ethernet/broadcom/Kconfig"
> source "drivers/net/ethernet/brocade/Kconfig"
> source "drivers/net/ethernet/cadence/Kconfig"
> diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
> index f8f38dcb5f8a..1e7dc8a7762d 100644
> --- a/drivers/net/ethernet/Makefile
> +++ b/drivers/net/ethernet/Makefile
> @@ -19,7 +19,6 @@ obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
> obj-$(CONFIG_NET_VENDOR_AQUANTIA) += aquantia/
> obj-$(CONFIG_NET_VENDOR_ARC) += arc/
> obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
> -obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
> obj-$(CONFIG_NET_VENDOR_CADENCE) += cadence/
> obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
> obj-$(CONFIG_NET_VENDOR_BROCADE) += brocade/
> diff --git a/drivers/net/ethernet/aurora/Kconfig b/drivers/net/ethernet/aurora/Kconfig
> deleted file mode 100644
> index 9ee30ea90bfa..000000000000
> --- a/drivers/net/ethernet/aurora/Kconfig
> +++ /dev/null
> @@ -1,23 +0,0 @@
> -# SPDX-License-Identifier: GPL-2.0-only
> -config NET_VENDOR_AURORA
> - bool "Aurora VLSI devices"
> - default y
> - 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"
> - depends on HAS_DMA
> - 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
> deleted file mode 100644
> index f3d599867619..000000000000
> --- a/drivers/net/ethernet/aurora/Makefile
> +++ /dev/null
> @@ -1,2 +0,0 @@
> -# SPDX-License-Identifier: GPL-2.0-only
> -obj-$(CONFIG_AURORA_NB8800) += nb8800.o
> diff --git a/drivers/net/ethernet/aurora/nb8800.c b/drivers/net/ethernet/aurora/nb8800.c
> deleted file mode 100644
> index 5b20185cbd62..000000000000
> --- a/drivers/net/ethernet/aurora/nb8800.c
> +++ /dev/null
> @@ -1,1520 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-or-later
> -/*
> - * 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>
> - */
> -
> -#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@xxxxxxxxx>");
> -MODULE_LICENSE("GPL");
> diff --git a/drivers/net/ethernet/aurora/nb8800.h b/drivers/net/ethernet/aurora/nb8800.h
> deleted file mode 100644
> index 40941fb6065b..000000000000
> --- a/drivers/net/ethernet/aurora/nb8800.h
> +++ /dev/null
> @@ -1,316 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -#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 RX_COPYBREAK 256
> -#define RX_COPYHDR 128
> -
> -#define MAX_MDC_CLOCK 2500000
> -
> -/* Stargate Solutions SSN8800 core registers */
> -#define NB8800_TX_CTL1 0x000
> -#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 0x001
> -
> -#define NB8800_RX_CTL 0x004
> -#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 0x008
> -#define NB8800_TX_SDP 0x14
> -#define NB8800_TX_TPDP1 0x18
> -#define NB8800_TX_TPDP2 0x19
> -#define NB8800_SLOT_TIME 0x1c
> -
> -#define NB8800_MDIO_CMD 0x020
> -#define MDIO_CMD_GO BIT(31)
> -#define MDIO_CMD_WR BIT(26)
> -#define MDIO_CMD_ADDR(x) ((x) << 21)
> -#define MDIO_CMD_REG(x) ((x) << 16)
> -#define MDIO_CMD_DATA(x) ((x) << 0)
> -
> -#define NB8800_MDIO_STS 0x024
> -#define MDIO_STS_ERR BIT(31)
> -
> -#define NB8800_MC_ADDR(i) (0x028 + (i))
> -#define NB8800_MC_INIT 0x02e
> -#define NB8800_UC_ADDR(i) (0x03c + (i))
> -
> -#define NB8800_MAC_MODE 0x044
> -#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 0x050
> -#define NB8800_PE_THRESHOLD 0x051
> -#define NB8800_PF_THRESHOLD 0x052
> -#define NB8800_TX_BUFSIZE 0x054
> -#define NB8800_FIFO_CTL 0x056
> -#define NB8800_PQ1 0x060
> -#define NB8800_PQ2 0x061
> -#define NB8800_SRC_ADDR(i) (0x06a + (i))
> -#define NB8800_STAT_DATA 0x078
> -#define NB8800_STAT_INDEX 0x07c
> -#define NB8800_STAT_CLEAR 0x07d
> -
> -#define NB8800_SLEEP_MODE 0x07e
> -#define SLEEP_MODE BIT(0)
> -
> -#define NB8800_WAKEUP 0x07f
> -#define WAKEUP BIT(0)
> -
> -/* Aurora NB8800 host interface registers */
> -#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_TRANSFERRED(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) & 0x07)
> -
> -#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_ALIGNMENT_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 PAD_MODE_MASK 0x7
> -#define PAD_MODE_MII 0x0
> -#define PAD_MODE_RGMII 0x1
> -#define PAD_MODE_GTX_CLK_INV BIT(3)
> -#define PAD_MODE_GTX_CLK_DELAY BIT(4)
> -
> -#define NB8800_TANGOX_MDIO_CLKDIV 0x420
> -#define NB8800_TANGOX_RESET 0x424
> -
> -/* Hardware DMA descriptor */
> -struct nb8800_dma_desc {
> - u32 s_addr; /* start address */
> - u32 n_addr; /* next descriptor address */
> - u32 r_addr; /* report address */
> - u32 config;
> -} __aligned(8);
> -
> -#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)
> -
> -/* DMA descriptor and associated data for rx.
> - * Allocated from coherent memory.
> - */
> -struct nb8800_rx_desc {
> - /* DMA descriptor */
> - struct nb8800_dma_desc desc;
> -
> - /* Status report filled in by hardware */
> - u32 report;
> -};
> -
> -/* Address of buffer on rx ring */
> -struct nb8800_rx_buf {
> - struct page *page;
> - unsigned long offset;
> -};
> -
> -/* DMA descriptors and associated data for tx.
> - * Allocated from coherent memory.
> - */
> -struct nb8800_tx_desc {
> - /* DMA descriptor. The second descriptor is used if packet
> - * data is unaligned.
> - */
> - struct nb8800_dma_desc desc[2];
> -
> - /* Status report filled in by hardware */
> - u32 report;
> -
> - /* Bounce buffer for initial unaligned part of packet */
> - u8 buf[8] __aligned(8);
> -};
> -
> -/* Packet in tx queue */
> -struct nb8800_tx_buf {
> - /* Currently queued skb */
> - struct sk_buff *skb;
> -
> - /* DMA address of the first descriptor */
> - dma_addr_t dma_desc;
> -
> - /* DMA address of packet data */
> - dma_addr_t dma_addr;
> -
> - /* Length of DMA mapping, less than skb->len if alignment
> - * buffer is used.
> - */
> - unsigned int dma_len;
> -
> - /* Number of packets in chain starting here */
> - unsigned int chain_len;
> -
> - /* Packet chain ready to be submitted to hardware */
> - bool ready;
> -};
> -
> -struct nb8800_priv {
> - struct napi_struct napi;
> -
> - void __iomem *base;
> -
> - /* RX DMA descriptors */
> - struct nb8800_rx_desc *rx_descs;
> -
> - /* RX buffers referenced by DMA descriptors */
> - struct nb8800_rx_buf *rx_bufs;
> -
> - /* Current end of chain */
> - u32 rx_eoc;
> -
> - /* Value for rx interrupt time register in NAPI interrupt mode */
> - u32 rx_itr_irq;
> -
> - /* Value for rx interrupt time register in NAPI poll mode */
> - u32 rx_itr_poll;
> -
> - /* Value for config field of rx DMA descriptors */
> - u32 rx_dma_config;
> -
> - /* TX DMA descriptors */
> - struct nb8800_tx_desc *tx_descs;
> -
> - /* TX packet queue */
> - struct nb8800_tx_buf *tx_bufs;
> -
> - /* Number of free tx queue entries */
> - atomic_t tx_free;
> -
> - /* First free tx queue entry */
> - u32 tx_next;
> -
> - /* Next buffer to transmit */
> - u32 tx_queue;
> -
> - /* Start of current packet chain */
> - struct nb8800_tx_buf *tx_chain;
> -
> - /* Next buffer to reclaim */
> - u32 tx_done;
> -
> - /* Lock for DMA activation */
> - spinlock_t tx_lock;
> -
> - struct mii_bus *mii_bus;
> - struct device_node *phy_node;
> -
> - /* PHY connection type from DT */
> - phy_interface_t phy_mode;
> -
> - /* Current link status */
> - int speed;
> - int duplex;
> - int link;
> -
> - /* Pause settings */
> - bool pause_aneg;
> - bool pause_rx;
> - bool pause_tx;
> -
> - /* DMA base address of rx descriptors, see rx_descs above */
> - dma_addr_t rx_desc_dma;
> -
> - /* DMA base address of tx descriptors, see tx_descs above */
> - dma_addr_t tx_desc_dma;
> -
> - struct clk *clk;
> -};
> -
> -struct nb8800_ops {
> - int (*init)(struct net_device *dev);
> - int (*reset)(struct net_device *dev);
> -};
> -
> -#endif /* _NB8800_H_ */
> --
>
> 2.29.2
>
--
Måns Rullgård