cns3xxx: drop target

This target has not been updated to 5.4 yet, and the only person
trying it (Koen) decided to retreat based on the following reasons:

- The target is not DT-aware at all

- The huge amount of effort required

- The SoC itself reached EoL at Cavium for some time now

- Upstream removed some important parts as it's also slowly getting EoL
  over there

- The commercial product that used this will fade out shortly

- The amount of download for this binary suggest that the target is not
  that popular

Since nobody has picked up the work since then, and this is the last
remaining 4.19-only target, finally drop it now.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 1325 deletions

diff --git a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
deleted file mode 100644
index 4556499429..0000000000
--- a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
+++ /dev/null
@@ -1,1325 +0,0 @@
-/*
- * Cavium CNS3xxx Gigabit driver for Linux
- *
- * Copyright 2011 Gateworks Corporation
- *		  Chris Lang <clang@gateworks.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmapool.h>
-#include <linux/etherdevice.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/phy.h>
-#include <linux/platform_device.h>
-#include <linux/platform_data/cns3xxx.h>
-#include <linux/skbuff.h>
-
-#define DRV_NAME "cns3xxx_eth"
-
-#define RX_DESCS 256
-#define TX_DESCS 128
-#define TX_DESC_RESERVE	20
-
-#define RX_POOL_ALLOC_SIZE (sizeof(struct rx_desc) * RX_DESCS)
-#define TX_POOL_ALLOC_SIZE (sizeof(struct tx_desc) * TX_DESCS)
-#define REGS_SIZE 336
-
-#define RX_BUFFER_ALIGN 64
-#define RX_BUFFER_ALIGN_MASK (~(RX_BUFFER_ALIGN - 1))
-
-#define SKB_HEAD_ALIGN (((PAGE_SIZE - NET_SKB_PAD) % RX_BUFFER_ALIGN) + NET_SKB_PAD + NET_IP_ALIGN)
-#define RX_SEGMENT_ALLOC_SIZE 2048
-#define RX_SEGMENT_BUFSIZE (SKB_WITH_OVERHEAD(RX_SEGMENT_ALLOC_SIZE))
-#define RX_SEGMENT_MRU (((RX_SEGMENT_BUFSIZE - SKB_HEAD_ALIGN) & RX_BUFFER_ALIGN_MASK) - NET_IP_ALIGN)
-#define MAX_MTU	9500
-
-#define NAPI_WEIGHT 64
-
-/* MDIO Defines */
-#define MDIO_CMD_COMPLETE 0x00008000
-#define MDIO_WRITE_COMMAND 0x00002000
-#define MDIO_READ_COMMAND 0x00004000
-#define MDIO_REG_OFFSET 8
-#define MDIO_VALUE_OFFSET 16
-
-/* Descritor Defines */
-#define END_OF_RING 0x40000000
-#define FIRST_SEGMENT 0x20000000
-#define LAST_SEGMENT 0x10000000
-#define FORCE_ROUTE 0x04000000
-#define UDP_CHECKSUM 0x00020000
-#define TCP_CHECKSUM 0x00010000
-
-/* Port Config Defines */
-#define PORT_BP_ENABLE 0x00020000
-#define PORT_DISABLE 0x00040000
-#define PORT_LEARN_DIS 0x00080000
-#define PORT_BLOCK_STATE 0x00100000
-#define PORT_BLOCK_MODE 0x00200000
-
-#define PROMISC_OFFSET 29
-
-/* Global Config Defines */
-#define UNKNOWN_VLAN_TO_CPU 0x02000000
-#define ACCEPT_CRC_PACKET 0x00200000
-#define CRC_STRIPPING 0x00100000
-
-/* VLAN Config Defines */
-#define NIC_MODE 0x00008000
-#define VLAN_UNAWARE 0x00000001
-
-/* DMA AUTO Poll Defines */
-#define TS_POLL_EN 0x00000020
-#define TS_SUSPEND 0x00000010
-#define FS_POLL_EN 0x00000002
-#define FS_SUSPEND 0x00000001
-
-/* DMA Ring Control Defines */
-#define QUEUE_THRESHOLD 0x000000f0
-#define CLR_FS_STATE 0x80000000
-
-/* Interrupt Status Defines */
-#define MAC0_STATUS_CHANGE 0x00004000
-#define MAC1_STATUS_CHANGE 0x00008000
-#define MAC2_STATUS_CHANGE 0x00010000
-#define MAC0_RX_ERROR 0x00100000
-#define MAC1_RX_ERROR 0x00200000
-#define MAC2_RX_ERROR 0x00400000
-
-struct tx_desc
-{
-	u32 sdp; /* segment data pointer */
-
-	union {
-		struct {
-			u32 sdl:16; /* segment data length */
-			u32 tco:1;
-			u32 uco:1;
-			u32 ico:1;
-			u32 rsv_1:3; /* reserve */
-			u32 pri:3;
-			u32 fp:1; /* force priority */
-			u32 fr:1;
-			u32 interrupt:1;
-			u32 lsd:1;
-			u32 fsd:1;
-			u32 eor:1;
-			u32 cown:1;
-		};
-		u32 config0;
-	};
-
-	union {
-		struct {
-			u32 ctv:1;
-			u32 stv:1;
-			u32 sid:4;
-			u32 inss:1;
-			u32 dels:1;
-			u32 rsv_2:9;
-			u32 pmap:5;
-			u32 mark:3;
-			u32 ewan:1;
-			u32 fewan:1;
-			u32 rsv_3:5;
-		};
-		u32 config1;
-	};
-
-	union {
-		struct {
-			u32 c_vid:12;
-			u32 c_cfs:1;
-			u32 c_pri:3;
-			u32 s_vid:12;
-			u32 s_dei:1;
-			u32 s_pri:3;
-		};
-		u32 config2;
-	};
-
-	u8 alignment[16]; /* for 32 byte */
-};
-
-struct rx_desc
-{
-	u32 sdp; /* segment data pointer */
-
-	union {
-		struct {
-			u32 sdl:16; /* segment data length */
-			u32 l4f:1;
-			u32 ipf:1;
-			u32 prot:4;
-			u32 hr:6;
-			u32 lsd:1;
-			u32 fsd:1;
-			u32 eor:1;
-			u32 cown:1;
-		};
-		u32 config0;
-	};
-
-	union {
-		struct {
-			u32 ctv:1;
-			u32 stv:1;
-			u32 unv:1;
-			u32 iwan:1;
-			u32 exdv:1;
-			u32 e_wan:1;
-			u32 rsv_1:2;
-			u32 sp:3;
-			u32 crc_err:1;
-			u32 un_eth:1;
-			u32 tc:2;
-			u32 rsv_2:1;
-			u32 ip_offset:5;
-			u32 rsv_3:11;
-		};
-		u32 config1;
-	};
-
-	union {
-		struct {
-			u32 c_vid:12;
-			u32 c_cfs:1;
-			u32 c_pri:3;
-			u32 s_vid:12;
-			u32 s_dei:1;
-			u32 s_pri:3;
-		};
-		u32 config2;
-	};
-
-	u8 alignment[16]; /* for 32 byte alignment */
-};
-
-
-struct switch_regs {
-	u32 phy_control;
-	u32 phy_auto_addr;
-	u32 mac_glob_cfg;
-	u32 mac_cfg[4];
-	u32 mac_pri_ctrl[5], __res;
-	u32 etype[2];
-	u32 udp_range[4];
-	u32 prio_etype_udp;
-	u32 prio_ipdscp[8];
-	u32 tc_ctrl;
-	u32 rate_ctrl;
-	u32 fc_glob_thrs;
-	u32 fc_port_thrs;
-	u32 mc_fc_glob_thrs;
-	u32 dc_glob_thrs;
-	u32 arl_vlan_cmd;
-	u32 arl_ctrl[3];
-	u32 vlan_cfg;
-	u32 pvid[2];
-	u32 vlan_ctrl[3];
-	u32 session_id[8];
-	u32 intr_stat;
-	u32 intr_mask;
-	u32 sram_test;
-	u32 mem_queue;
-	u32 farl_ctrl;
-	u32 fc_input_thrs, __res1[2];
-	u32 clk_skew_ctrl;
-	u32 mac_glob_cfg_ext, __res2[2];
-	u32 dma_ring_ctrl;
-	u32 dma_auto_poll_cfg;
-	u32 delay_intr_cfg, __res3;
-	u32 ts_dma_ctrl0;
-	u32 ts_desc_ptr0;
-	u32 ts_desc_base_addr0, __res4;
-	u32 fs_dma_ctrl0;
-	u32 fs_desc_ptr0;
-	u32 fs_desc_base_addr0, __res5;
-	u32 ts_dma_ctrl1;
-	u32 ts_desc_ptr1;
-	u32 ts_desc_base_addr1, __res6;
-	u32 fs_dma_ctrl1;
-	u32 fs_desc_ptr1;
-	u32 fs_desc_base_addr1;
-	u32 __res7[109];
-	u32 mac_counter0[13];
-};
-
-struct _tx_ring {
-	struct tx_desc *desc;
-	dma_addr_t phys_addr;
-	struct tx_desc *cur_addr;
-	struct sk_buff *buff_tab[TX_DESCS];
-	unsigned int phys_tab[TX_DESCS];
-	u32 free_index;
-	u32 count_index;
-	u32 cur_index;
-	int num_used;
-	int num_count;
-	bool stopped;
-};
-
-struct _rx_ring {
-	struct rx_desc *desc;
-	dma_addr_t phys_addr;
-	struct rx_desc *cur_addr;
-	void *buff_tab[RX_DESCS];
-	unsigned int phys_tab[RX_DESCS];
-	u32 cur_index;
-	u32 alloc_index;
-	int alloc_count;
-};
-
-struct sw {
-	struct switch_regs __iomem *regs;
-	struct napi_struct napi;
-	struct cns3xxx_plat_info *plat;
-	struct _tx_ring tx_ring;
-	struct _rx_ring rx_ring;
-	struct sk_buff *frag_first;
-	struct sk_buff *frag_last;
-	struct device *dev;
-	int rx_irq;
-	int stat_irq;
-};
-
-struct port {
-	struct net_device *netdev;
-	struct phy_device *phydev;
-	struct sw *sw;
-	int id;			/* logical port ID */
-	int speed, duplex;
-};
-
-static spinlock_t mdio_lock;
-static DEFINE_SPINLOCK(tx_lock);
-static struct switch_regs __iomem *mdio_regs; /* mdio command and status only */
-struct mii_bus *mdio_bus;
-static int ports_open;
-static struct port *switch_port_tab[4];
-struct net_device *napi_dev;
-
-static int cns3xxx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
-			   int write, u16 cmd)
-{
-	int cycles = 0;
-	u32 temp = 0;
-
-	temp = __raw_readl(&mdio_regs->phy_control);
-	temp |= MDIO_CMD_COMPLETE;
-	__raw_writel(temp, &mdio_regs->phy_control);
-	udelay(10);
-
-	if (write) {
-		temp = (cmd << MDIO_VALUE_OFFSET);
-		temp |= MDIO_WRITE_COMMAND;
-	} else {
-		temp = MDIO_READ_COMMAND;
-	}
-
-	temp |= ((location & 0x1f) << MDIO_REG_OFFSET);
-	temp |= (phy_id & 0x1f);
-
-	__raw_writel(temp, &mdio_regs->phy_control);
-
-	while (((__raw_readl(&mdio_regs->phy_control) & MDIO_CMD_COMPLETE) == 0)
-			&& cycles < 5000) {
-		udelay(1);
-		cycles++;
-	}
-
-	if (cycles == 5000) {
-		printk(KERN_ERR "%s #%i: MII transaction failed\n", bus->name, phy_id);
-		return -1;
-	}
-
-	temp = __raw_readl(&mdio_regs->phy_control);
-	temp |= MDIO_CMD_COMPLETE;
-	__raw_writel(temp, &mdio_regs->phy_control);
-
-	if (write)
-		return 0;
-
-	return ((temp >> MDIO_VALUE_OFFSET) & 0xFFFF);
-}
-
-static int cns3xxx_mdio_read(struct mii_bus *bus, int phy_id, int location)
-{
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&mdio_lock, flags);
-	ret = cns3xxx_mdio_cmd(bus, phy_id, location, 0, 0);
-	spin_unlock_irqrestore(&mdio_lock, flags);
-	return ret;
-}
-
-static int cns3xxx_mdio_write(struct mii_bus *bus, int phy_id, int location, u16 val)
-{
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&mdio_lock, flags);
-	ret = cns3xxx_mdio_cmd(bus, phy_id, location, 1, val);
-	spin_unlock_irqrestore(&mdio_lock, flags);
-	return ret;
-}
-
-static int cns3xxx_mdio_register(void __iomem *base)
-{
-	int err;
-
-	if (!(mdio_bus = mdiobus_alloc()))
-		return -ENOMEM;
-
-	mdio_regs = base;
-
-	spin_lock_init(&mdio_lock);
-	mdio_bus->name = "CNS3xxx MII Bus";
-	mdio_bus->read = &cns3xxx_mdio_read;
-	mdio_bus->write = &cns3xxx_mdio_write;
-	strcpy(mdio_bus->id, "0");
-
-	if ((err = mdiobus_register(mdio_bus)))
-		mdiobus_free(mdio_bus);
-
-	return err;
-}
-
-static void cns3xxx_mdio_remove(void)
-{
-	mdiobus_unregister(mdio_bus);
-	mdiobus_free(mdio_bus);
-}
-
-static void enable_tx_dma(struct sw *sw)
-{
-	__raw_writel(0x1, &sw->regs->ts_dma_ctrl0);
-}
-
-static void enable_rx_dma(struct sw *sw)
-{
-	__raw_writel(0x1, &sw->regs->fs_dma_ctrl0);
-}
-
-static void cns3xxx_adjust_link(struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	struct phy_device *phydev = port->phydev;
-
-	if (!phydev->link) {
-		if (port->speed) {
-			port->speed = 0;
-			printk(KERN_INFO "%s: link down\n", dev->name);
-		}
-		return;
-	}
-
-	if (port->speed == phydev->speed && port->duplex == phydev->duplex)
-		return;
-
-	port->speed = phydev->speed;
-	port->duplex = phydev->duplex;
-
-	printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
-	       dev->name, port->speed, port->duplex ? "full" : "half");
-}
-
-static void eth_schedule_poll(struct sw *sw)
-{
-	if (unlikely(!napi_schedule_prep(&sw->napi)))
-		return;
-
-	disable_irq_nosync(sw->rx_irq);
-	__napi_schedule(&sw->napi);
-}
-
-irqreturn_t eth_rx_irq(int irq, void *pdev)
-{
-	struct net_device *dev = pdev;
-	struct sw *sw = netdev_priv(dev);
-	eth_schedule_poll(sw);
-	return (IRQ_HANDLED);
-}
-
-irqreturn_t eth_stat_irq(int irq, void *pdev)
-{
-	struct net_device *dev = pdev;
-	struct sw *sw = netdev_priv(dev);
-	u32 cfg;
-	u32 stat = __raw_readl(&sw->regs->intr_stat);
-	__raw_writel(0xffffffff, &sw->regs->intr_stat);
-
-	if (stat & MAC2_RX_ERROR)
-		switch_port_tab[3]->netdev->stats.rx_dropped++;
-	if (stat & MAC1_RX_ERROR)
-		switch_port_tab[1]->netdev->stats.rx_dropped++;
-	if (stat & MAC0_RX_ERROR)
-		switch_port_tab[0]->netdev->stats.rx_dropped++;
-
-	if (stat & MAC0_STATUS_CHANGE) {
-		cfg = __raw_readl(&sw->regs->mac_cfg[0]);
-		switch_port_tab[0]->phydev->link = (cfg & 0x1);
-		switch_port_tab[0]->phydev->duplex = ((cfg >> 4) & 0x1);
-		if (((cfg >> 2) & 0x3) == 2)
-			switch_port_tab[0]->phydev->speed = 1000;
-		else if (((cfg >> 2) & 0x3) == 1)
-			switch_port_tab[0]->phydev->speed = 100;
-		else
-			switch_port_tab[0]->phydev->speed = 10;
-		cns3xxx_adjust_link(switch_port_tab[0]->netdev);
-	}
-
-	if (stat & MAC1_STATUS_CHANGE) {
-		cfg = __raw_readl(&sw->regs->mac_cfg[1]);
-		switch_port_tab[1]->phydev->link = (cfg & 0x1);
-		switch_port_tab[1]->phydev->duplex = ((cfg >> 4) & 0x1);
-		if (((cfg >> 2) & 0x3) == 2)
-			switch_port_tab[1]->phydev->speed = 1000;
-		else if (((cfg >> 2) & 0x3) == 1)
-			switch_port_tab[1]->phydev->speed = 100;
-		else
-			switch_port_tab[1]->phydev->speed = 10;
-		cns3xxx_adjust_link(switch_port_tab[1]->netdev);
-	}
-
-	if (stat & MAC2_STATUS_CHANGE) {
-		cfg = __raw_readl(&sw->regs->mac_cfg[3]);
-		switch_port_tab[3]->phydev->link = (cfg & 0x1);
-		switch_port_tab[3]->phydev->duplex = ((cfg >> 4) & 0x1);
-		if (((cfg >> 2) & 0x3) == 2)
-			switch_port_tab[3]->phydev->speed = 1000;
-		else if (((cfg >> 2) & 0x3) == 1)
-			switch_port_tab[3]->phydev->speed = 100;
-		else
-			switch_port_tab[3]->phydev->speed = 10;
-		cns3xxx_adjust_link(switch_port_tab[3]->netdev);
-	}
-
-	return (IRQ_HANDLED);
-}
-
-
-static void cns3xxx_alloc_rx_buf(struct sw *sw, int received)
-{
-	struct _rx_ring *rx_ring = &sw->rx_ring;
-	unsigned int i = rx_ring->alloc_index;
-	struct rx_desc *desc = &(rx_ring)->desc[i];
-	void *buf;
-	unsigned int phys;
-
-	for (received += rx_ring->alloc_count; received > 0; received--) {
-		buf = napi_alloc_frag(RX_SEGMENT_ALLOC_SIZE);
-		if (!buf)
-			break;
-
-		phys = dma_map_single(sw->dev, buf + SKB_HEAD_ALIGN,
-				      RX_SEGMENT_MRU, DMA_FROM_DEVICE);
-		if (dma_mapping_error(sw->dev, phys)) {
-			skb_free_frag(buf);
-			break;
-		}
-
-		desc->sdl = RX_SEGMENT_MRU;
-		desc->sdp = phys;
-
-		wmb();
-
-		/* put the new buffer on RX-free queue */
-		rx_ring->buff_tab[i] = buf;
-		rx_ring->phys_tab[i] = phys;
-
-		if (i == RX_DESCS - 1) {
-			desc->config0 = FIRST_SEGMENT | LAST_SEGMENT | RX_SEGMENT_MRU | END_OF_RING;
-			i = 0;
-			desc = &(rx_ring)->desc[i];
-		} else {
-			desc->config0 = FIRST_SEGMENT | LAST_SEGMENT | RX_SEGMENT_MRU;
-			i++;
-			desc++;
-		}
-	}
-
-	rx_ring->alloc_count = received;
-	rx_ring->alloc_index = i;
-}
-
-static void eth_check_num_used(struct _tx_ring *tx_ring)
-{
-	bool stop = false;
-	int i;
-
-	if (tx_ring->num_used >= TX_DESCS - TX_DESC_RESERVE)
-		stop = true;
-
-	if (tx_ring->stopped == stop)
-		return;
-
-	tx_ring->stopped = stop;
-
-	for (i = 0; i < 4; i++) {
-		struct port *port = switch_port_tab[i];
-		struct net_device *dev;
-
-		if (!port)
-			continue;
-
-		dev = port->netdev;
-
-		if (stop)
-			netif_stop_queue(dev);
-		else
-			netif_wake_queue(dev);
-	}
-}
-
-static void eth_complete_tx(struct sw *sw)
-{
-	struct _tx_ring *tx_ring = &sw->tx_ring;
-	struct tx_desc *desc;
-	int i;
-	int index;
-	int num_used = tx_ring->num_used;
-	struct sk_buff *skb;
-
-	index = tx_ring->free_index;
-	desc = &(tx_ring)->desc[index];
-
-	for (i = 0; i < num_used; i++) {
-		if (!desc->cown)
-			break;
-
-		skb = tx_ring->buff_tab[index];
-		tx_ring->buff_tab[index] = 0;
-
-		if (skb)
-			dev_kfree_skb_any(skb);
-
-		dma_unmap_single(sw->dev, tx_ring->phys_tab[index], desc->sdl, DMA_TO_DEVICE);
-
-		if (index == TX_DESCS - 1) {
-			index = 0;
-			desc = &(tx_ring)->desc[index];
-		} else {
-			index++;
-			desc++;
-		}
-	}
-
-	tx_ring->free_index = index;
-	tx_ring->num_used -= i;
-	eth_check_num_used(tx_ring);
-}
-
-static int eth_poll(struct napi_struct *napi, int budget)
-{
-	struct sw *sw = container_of(napi, struct sw, napi);
-	struct _rx_ring *rx_ring = &sw->rx_ring;
-	int received = 0;
-	unsigned int length;
-	unsigned int i = rx_ring->cur_index;
-	struct rx_desc *desc = &(rx_ring)->desc[i];
-	unsigned int alloc_count = rx_ring->alloc_count;
-
-	while (desc->cown && alloc_count + received < RX_DESCS - 1) {
-		struct sk_buff *skb;
-		int reserve = SKB_HEAD_ALIGN;
-
-		if (received >= budget)
-			break;
-
-		/* process received frame */
-		dma_unmap_single(sw->dev, rx_ring->phys_tab[i], RX_SEGMENT_MRU, DMA_FROM_DEVICE);
-
-		skb = build_skb(rx_ring->buff_tab[i], RX_SEGMENT_ALLOC_SIZE);
-		if (!skb)
-			break;
-
-		skb->dev = switch_port_tab[desc->sp]->netdev;
-
-		length = desc->sdl;
-		if (desc->fsd && !desc->lsd)
-			length = RX_SEGMENT_MRU;
-
-		if (!desc->fsd) {
-			reserve -= NET_IP_ALIGN;
-			if (!desc->lsd)
-				length += NET_IP_ALIGN;
-		}
-
-		skb_reserve(skb, reserve);
-		skb_put(skb, length);
-
-		if (!sw->frag_first)
-			sw->frag_first = skb;
-		else {
-			if (sw->frag_first == sw->frag_last)
-				skb_shinfo(sw->frag_first)->frag_list = skb;
-			else
-				sw->frag_last->next = skb;
-			sw->frag_first->len += skb->len;
-			sw->frag_first->data_len += skb->len;
-			sw->frag_first->truesize += skb->truesize;
-		}
-		sw->frag_last = skb;
-
-		if (desc->lsd) {
-			struct net_device *dev;
-
-			skb = sw->frag_first;
-			dev = skb->dev;
-			skb->protocol = eth_type_trans(skb, dev);
-
-			dev->stats.rx_packets++;
-			dev->stats.rx_bytes += skb->len;
-
-			/* RX Hardware checksum offload */
-			skb->ip_summed = CHECKSUM_NONE;
-			switch (desc->prot) {
-				case 1:
-				case 2:
-				case 5:
-				case 6:
-				case 13:
-				case 14:
-					if (!desc->l4f) {
-						skb->ip_summed = CHECKSUM_UNNECESSARY;
-						napi_gro_receive(napi, skb);
-						break;
-					}
-					/* fall through */
-				default:
-					netif_receive_skb(skb);
-					break;
-			}
-
-			sw->frag_first = NULL;
-			sw->frag_last = NULL;
-		}
-
-		received++;
-		if (i == RX_DESCS - 1) {
-			i = 0;
-			desc = &(rx_ring)->desc[i];
-		} else {
-			i++;
-			desc++;
-		}
-	}
-
-	rx_ring->cur_index = i;
-
-	cns3xxx_alloc_rx_buf(sw, received);
-	wmb();
-	enable_rx_dma(sw);
-
-	if (received < budget && napi_complete_done(napi, received)) {
-		enable_irq(sw->rx_irq);
-	}
-
-	spin_lock_bh(&tx_lock);
-	eth_complete_tx(sw);
-	spin_unlock_bh(&tx_lock);
-
-	return received;
-}
-
-static void eth_set_desc(struct sw *sw, struct _tx_ring *tx_ring, int index,
-			 int index_last, void *data, int len, u32 config0,
-			 u32 pmap)
-{
-	struct tx_desc *tx_desc = &(tx_ring)->desc[index];
-	unsigned int phys;
-
-	phys = dma_map_single(sw->dev, data, len, DMA_TO_DEVICE);
-	tx_desc->sdp = phys;
-	tx_desc->pmap = pmap;
-	tx_ring->phys_tab[index] = phys;
-
-	config0 |= len;
-
-	if (index == TX_DESCS - 1)
-		config0 |= END_OF_RING;
-
-	if (index == index_last)
-		config0 |= LAST_SEGMENT;
-
-	wmb();
-	tx_desc->config0 = config0;
-}
-
-static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	struct sw *sw = port->sw;
-	struct _tx_ring *tx_ring = &sw->tx_ring;
-	struct sk_buff *skb1;
-	char pmap = (1 << port->id);
-	int nr_frags = skb_shinfo(skb)->nr_frags;
-	int nr_desc = nr_frags;
-	int index0, index, index_last;
-	int len0;
-	int i;
-	u32 config0;
-
-	if (pmap == 8)
-		pmap = (1 << 4);
-
-	skb_walk_frags(skb, skb1)
-		nr_desc++;
-
-	eth_schedule_poll(sw);
-	spin_lock_bh(&tx_lock);
-
-	if ((tx_ring->num_used + nr_desc + 1) >= TX_DESCS) {
-		spin_unlock_bh(&tx_lock);
-		return NETDEV_TX_BUSY;
-	}
-
-	index = index0 = tx_ring->cur_index;
-	index_last = (index0 + nr_desc) % TX_DESCS;
-	tx_ring->cur_index = (index_last + 1) % TX_DESCS;
-
-	spin_unlock_bh(&tx_lock);
-
-	config0 = FORCE_ROUTE;
-	if (skb->ip_summed == CHECKSUM_PARTIAL)
-		config0 |= UDP_CHECKSUM | TCP_CHECKSUM;
-
-	len0 = skb->len;
-
-	/* fragments */
-	for (i = 0; i < nr_frags; i++) {
-		struct skb_frag_struct *frag;
-		void *addr;
-
-		index = (index + 1) % TX_DESCS;
-
-		frag = &skb_shinfo(skb)->frags[i];
-		addr = page_address(skb_frag_page(frag)) + frag->page_offset;
-
-		eth_set_desc(sw, tx_ring, index, index_last, addr, frag->size,
-			     config0, pmap);
-	}
-
-	if (nr_frags)
-		len0 = skb->len - skb->data_len;
-
-	skb_walk_frags(skb, skb1) {
-		index = (index + 1) % TX_DESCS;
-		len0 -= skb1->len;
-
-		eth_set_desc(sw, tx_ring, index, index_last, skb1->data,
-			     skb1->len, config0, pmap);
-	}
-
-	tx_ring->buff_tab[index0] = skb;
-	eth_set_desc(sw, tx_ring, index0, index_last, skb->data, len0,
-		     config0 | FIRST_SEGMENT, pmap);
-
-	wmb();
-
-	spin_lock(&tx_lock);
-	tx_ring->num_used += nr_desc + 1;
-	spin_unlock(&tx_lock);
-
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += skb->len;
-
-	enable_tx_dma(sw);
-
-	return NETDEV_TX_OK;
-}
-
-static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
-{
-	struct port *port = netdev_priv(dev);
-
-	if (!netif_running(dev))
-		return -EINVAL;
-	return phy_mii_ioctl(port->phydev, req, cmd);
-}
-
-/* ethtool support */
-
-static void cns3xxx_get_drvinfo(struct net_device *dev,
-			       struct ethtool_drvinfo *info)
-{
-	strcpy(info->driver, DRV_NAME);
-	strcpy(info->bus_info, "internal");
-}
-
-static int cns3xxx_nway_reset(struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	return phy_start_aneg(port->phydev);
-}
-
-static struct ethtool_ops cns3xxx_ethtool_ops = {
-	.get_drvinfo = cns3xxx_get_drvinfo,
-	.get_link_ksettings = phy_ethtool_get_link_ksettings,
-	.set_link_ksettings = phy_ethtool_set_link_ksettings,
-	.nway_reset = cns3xxx_nway_reset,
-	.get_link = ethtool_op_get_link,
-};
-
-
-static int init_rings(struct sw *sw)
-{
-	int i;
-	struct _rx_ring *rx_ring = &sw->rx_ring;
-	struct _tx_ring *tx_ring = &sw->tx_ring;
-
-	__raw_writel(0, &sw->regs->fs_dma_ctrl0);
-	__raw_writel(TS_SUSPEND | FS_SUSPEND, &sw->regs->dma_auto_poll_cfg);
-	__raw_writel(QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
-	__raw_writel(CLR_FS_STATE | QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
-	__raw_writel(QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
-
-	rx_ring->desc = dmam_alloc_coherent(sw->dev, RX_POOL_ALLOC_SIZE,
-					    &rx_ring->phys_addr, GFP_KERNEL);
-	if (!rx_ring->desc)
-		return -ENOMEM;
-
-	/* Setup RX buffers */
-	memset(rx_ring->desc, 0, RX_POOL_ALLOC_SIZE);
-
-	for (i = 0; i < RX_DESCS; i++) {
-		struct rx_desc *desc = &(rx_ring)->desc[i];
-		void *buf;
-
-		buf = netdev_alloc_frag(RX_SEGMENT_ALLOC_SIZE);
-		if (!buf)
-			return -ENOMEM;
-
-		desc->sdl = RX_SEGMENT_MRU;
-
-		if (i == (RX_DESCS - 1))
-			desc->eor = 1;
-
-		desc->fsd = 1;
-		desc->lsd = 1;
-
-		desc->sdp = dma_map_single(sw->dev, buf + SKB_HEAD_ALIGN,
-					   RX_SEGMENT_MRU, DMA_FROM_DEVICE);
-
-		if (dma_mapping_error(sw->dev, desc->sdp))
-			return -EIO;
-
-		rx_ring->buff_tab[i] = buf;
-		rx_ring->phys_tab[i] = desc->sdp;
-		desc->cown = 0;
-	}
-	__raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_ptr0);
-	__raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_base_addr0);
-
-	tx_ring->desc = dmam_alloc_coherent(sw->dev, TX_POOL_ALLOC_SIZE,
-					    &tx_ring->phys_addr, GFP_KERNEL);
-	if (!tx_ring->desc)
-		return -ENOMEM;
-
-	/* Setup TX buffers */
-	memset(tx_ring->desc, 0, TX_POOL_ALLOC_SIZE);
-
-	for (i = 0; i < TX_DESCS; i++) {
-		struct tx_desc *desc = &(tx_ring)->desc[i];
-		tx_ring->buff_tab[i] = 0;
-
-		if (i == (TX_DESCS - 1))
-			desc->eor = 1;
-
-		desc->cown = 1;
-	}
-	__raw_writel(tx_ring->phys_addr, &sw->regs->ts_desc_ptr0);
-	__raw_writel(tx_ring->phys_addr, &sw->regs->ts_desc_base_addr0);
-
-	return 0;
-}
-
-static void destroy_rings(struct sw *sw)
-{
-	int i;
-
-	for (i = 0; i < RX_DESCS; i++) {
-		struct _rx_ring *rx_ring = &sw->rx_ring;
-		struct rx_desc *desc = &(rx_ring)->desc[i];
-		void *buf = sw->rx_ring.buff_tab[i];
-
-		if (!buf)
-			continue;
-
-		dma_unmap_single(sw->dev, desc->sdp, RX_SEGMENT_MRU, DMA_FROM_DEVICE);
-		skb_free_frag(buf);
-	}
-
-	for (i = 0; i < TX_DESCS; i++) {
-		struct _tx_ring *tx_ring = &sw->tx_ring;
-		struct tx_desc *desc = &(tx_ring)->desc[i];
-		struct sk_buff *skb = sw->tx_ring.buff_tab[i];
-
-		if (!skb)
-			continue;
-
-		dma_unmap_single(sw->dev, desc->sdp, skb->len, DMA_TO_DEVICE);
-		dev_kfree_skb(skb);
-	}
-}
-
-static int eth_open(struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	struct sw *sw = port->sw;
-	u32 temp;
-
-	port->speed = 0;	/* force "link up" message */
-	phy_start(port->phydev);
-
-	netif_start_queue(dev);
-
-	if (!ports_open) {
-		request_irq(sw->rx_irq, eth_rx_irq, IRQF_SHARED, "gig_switch", napi_dev);
-		request_irq(sw->stat_irq, eth_stat_irq, IRQF_SHARED, "gig_stat", napi_dev);
-		napi_enable(&sw->napi);
-		netif_start_queue(napi_dev);
-
- 		__raw_writel(~(MAC0_STATUS_CHANGE | MAC1_STATUS_CHANGE | MAC2_STATUS_CHANGE |
- 			       MAC0_RX_ERROR | MAC1_RX_ERROR | MAC2_RX_ERROR), &sw->regs->intr_mask);
-
-		temp = __raw_readl(&sw->regs->mac_cfg[2]);
-		temp &= ~(PORT_DISABLE);
-		__raw_writel(temp, &sw->regs->mac_cfg[2]);
-
-		temp = __raw_readl(&sw->regs->dma_auto_poll_cfg);
-		temp &= ~(TS_SUSPEND | FS_SUSPEND);
-		__raw_writel(temp, &sw->regs->dma_auto_poll_cfg);
-
-		enable_rx_dma(sw);
-	}
-	temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
-	temp &= ~(PORT_DISABLE);
-	__raw_writel(temp, &sw->regs->mac_cfg[port->id]);
-
-	ports_open++;
-	netif_carrier_on(dev);
-
-	return 0;
-}
-
-static int eth_close(struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	struct sw *sw = port->sw;
-	u32 temp;
-
-	ports_open--;
-
-	temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
-	temp |= (PORT_DISABLE);
-	__raw_writel(temp, &sw->regs->mac_cfg[port->id]);
-
-	netif_stop_queue(dev);
-
-	phy_stop(port->phydev);
-
-	if (!ports_open) {
-		disable_irq(sw->rx_irq);
-		free_irq(sw->rx_irq, napi_dev);
-		disable_irq(sw->stat_irq);
-		free_irq(sw->stat_irq, napi_dev);
-		napi_disable(&sw->napi);
-		netif_stop_queue(napi_dev);
-		temp = __raw_readl(&sw->regs->mac_cfg[2]);
-		temp |= (PORT_DISABLE);
-		__raw_writel(temp, &sw->regs->mac_cfg[2]);
-
-		__raw_writel(TS_SUSPEND | FS_SUSPEND,
-			     &sw->regs->dma_auto_poll_cfg);
-	}
-
-	netif_carrier_off(dev);
-	return 0;
-}
-
-static void eth_rx_mode(struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	struct sw *sw = port->sw;
-	u32 temp;
-
-	temp = __raw_readl(&sw->regs->mac_glob_cfg);
-
-	if (dev->flags & IFF_PROMISC) {
-		if (port->id == 3)
-			temp |= ((1 << 2) << PROMISC_OFFSET);
-		else
-			temp |= ((1 << port->id) << PROMISC_OFFSET);
-	} else {
-		if (port->id == 3)
-			temp &= ~((1 << 2) << PROMISC_OFFSET);
-		else
-			temp &= ~((1 << port->id) << PROMISC_OFFSET);
-	}
-	__raw_writel(temp, &sw->regs->mac_glob_cfg);
-}
-
-static int eth_set_mac(struct net_device *netdev, void *p)
-{
-	struct port *port = netdev_priv(netdev);
-	struct sw *sw = port->sw;
-	struct sockaddr *addr = p;
-	u32 cycles = 0;
-
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EADDRNOTAVAIL;
-
-	/* Invalidate old ARL Entry */
-	if (port->id == 3)
-		__raw_writel((port->id << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
-	else
-		__raw_writel(((port->id + 1) << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
-	__raw_writel( ((netdev->dev_addr[0] << 24) | (netdev->dev_addr[1] << 16) |
-			(netdev->dev_addr[2] << 8) | (netdev->dev_addr[3])),
-			&sw->regs->arl_ctrl[1]);
-
-	__raw_writel( ((netdev->dev_addr[4] << 24) | (netdev->dev_addr[5] << 16) |
-			(1 << 1)),
-			&sw->regs->arl_ctrl[2]);
-	__raw_writel((1 << 19), &sw->regs->arl_vlan_cmd);
-
-	while (((__raw_readl(&sw->regs->arl_vlan_cmd) & (1 << 21)) == 0)
-			&& cycles < 5000) {
-		udelay(1);
-		cycles++;
-	}
-
-	cycles = 0;
-	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
-
-	if (port->id == 3)
-		__raw_writel((port->id << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
-	else
-		__raw_writel(((port->id + 1) << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
-	__raw_writel( ((addr->sa_data[0] << 24) | (addr->sa_data[1] << 16) |
-			(addr->sa_data[2] << 8) | (addr->sa_data[3])),
-			&sw->regs->arl_ctrl[1]);
-
-	__raw_writel( ((addr->sa_data[4] << 24) | (addr->sa_data[5] << 16) |
-			(7 << 4) | (1 << 1)), &sw->regs->arl_ctrl[2]);
-	__raw_writel((1 << 19), &sw->regs->arl_vlan_cmd);
-
-	while (((__raw_readl(&sw->regs->arl_vlan_cmd) & (1 << 21)) == 0)
-		&& cycles < 5000) {
-		udelay(1);
-		cycles++;
-	}
-	return 0;
-}
-
-static const struct net_device_ops cns3xxx_netdev_ops = {
-	.ndo_open = eth_open,
-	.ndo_stop = eth_close,
-	.ndo_start_xmit = eth_xmit,
-	.ndo_set_rx_mode = eth_rx_mode,
-	.ndo_do_ioctl = eth_ioctl,
-	.ndo_set_mac_address = eth_set_mac,
-	.ndo_validate_addr = eth_validate_addr,
-};
-
-static int eth_init_one(struct platform_device *pdev)
-{
-	int i;
-	struct port *port;
-	struct sw *sw;
-	struct net_device *dev;
-	struct cns3xxx_plat_info *plat = pdev->dev.platform_data;
-	char phy_id[MII_BUS_ID_SIZE + 3];
-	int err;
-	u32 temp;
-	struct resource *res;
-	void __iomem *regs;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(regs))
-		return PTR_ERR(regs);
-
-	err = cns3xxx_mdio_register(regs);
-	if (err)
-		return err;
-
-	if (!(napi_dev = alloc_etherdev(sizeof(struct sw)))) {
-		err = -ENOMEM;
-		goto err_remove_mdio;
-	}
-
-	strcpy(napi_dev->name, "cns3xxx_eth");
-	napi_dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST;
-
-	SET_NETDEV_DEV(napi_dev, &pdev->dev);
-	sw = netdev_priv(napi_dev);
-	memset(sw, 0, sizeof(struct sw));
-	sw->regs = regs;
-	sw->dev = &pdev->dev;
-
-	sw->rx_irq = platform_get_irq_byname(pdev, "eth_rx");
-	sw->stat_irq = platform_get_irq_byname(pdev, "eth_stat");
-
-	temp = __raw_readl(&sw->regs->phy_auto_addr);
-	temp |= (3 << 30); /* maximum frame length: 9600 bytes */
-	__raw_writel(temp, &sw->regs->phy_auto_addr);
-
-	for (i = 0; i < 4; i++) {
-		temp = __raw_readl(&sw->regs->mac_cfg[i]);
-		temp |= (PORT_DISABLE);
-		__raw_writel(temp, &sw->regs->mac_cfg[i]);
-	}
-
-	temp = PORT_DISABLE;
-	__raw_writel(temp, &sw->regs->mac_cfg[2]);
-
-	temp = __raw_readl(&sw->regs->vlan_cfg);
-	temp |= NIC_MODE | VLAN_UNAWARE;
-	__raw_writel(temp, &sw->regs->vlan_cfg);
-
-	__raw_writel(UNKNOWN_VLAN_TO_CPU |
-		     CRC_STRIPPING, &sw->regs->mac_glob_cfg);
-
-	if ((err = init_rings(sw)) != 0) {
-		err = -ENOMEM;
-		goto err_free;
-	}
-	platform_set_drvdata(pdev, napi_dev);
-
-	netif_napi_add(napi_dev, &sw->napi, eth_poll, NAPI_WEIGHT);
-
-	for (i = 0; i < 3; i++) {
-		if (!(plat->ports & (1 << i))) {
-			continue;
-		}
-
-		if (!(dev = alloc_etherdev(sizeof(struct port)))) {
-			goto free_ports;
-		}
-
-		port = netdev_priv(dev);
-		port->netdev = dev;
-		if (i == 2)
-			port->id = 3;
-		else
-			port->id = i;
-		port->sw = sw;
-
-		temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
-		temp |= (PORT_DISABLE | PORT_BLOCK_STATE | PORT_LEARN_DIS);
-		__raw_writel(temp, &sw->regs->mac_cfg[port->id]);
-
-		SET_NETDEV_DEV(dev, &pdev->dev);
-		dev->netdev_ops = &cns3xxx_netdev_ops;
-		dev->ethtool_ops = &cns3xxx_ethtool_ops;
-		dev->tx_queue_len = 1000;
-		dev->max_mtu = MAX_MTU;
-		dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST;
-
-		switch_port_tab[port->id] = port;
-		memcpy(dev->dev_addr, &plat->hwaddr[i], ETH_ALEN);
-
-		snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, "0", plat->phy[i]);
-		port->phydev = phy_connect(dev, phy_id, &cns3xxx_adjust_link,
-			PHY_INTERFACE_MODE_RGMII);
-		if ((err = IS_ERR(port->phydev))) {
-			switch_port_tab[port->id] = 0;
-			free_netdev(dev);
-			goto free_ports;
-		}
-
-		port->phydev->irq = PHY_IGNORE_INTERRUPT;
-
-		if ((err = register_netdev(dev))) {
-			phy_disconnect(port->phydev);
-			switch_port_tab[port->id] = 0;
-			free_netdev(dev);
-			goto free_ports;
-		}
-
-		printk(KERN_INFO "%s: RGMII PHY %i on cns3xxx Switch\n", dev->name, plat->phy[i]);
-		netif_carrier_off(dev);
-		dev = 0;
-	}
-
-	return 0;
-
-free_ports:
-	err = -ENOMEM;
-	for (--i; i >= 0; i--) {
-		if (switch_port_tab[i]) {
-			port = switch_port_tab[i];
-			dev = port->netdev;
-			unregister_netdev(dev);
-			phy_disconnect(port->phydev);
-			switch_port_tab[i] = 0;
-			free_netdev(dev);
-		}
-	}
-err_free:
-	free_netdev(napi_dev);
-err_remove_mdio:
-	cns3xxx_mdio_remove();
-	return err;
-}
-
-static int eth_remove_one(struct platform_device *pdev)
-{
-	struct net_device *dev = platform_get_drvdata(pdev);
-	struct sw *sw = netdev_priv(dev);
-	int i;
-
-	destroy_rings(sw);
-	for (i = 3; i >= 0; i--) {
-		if (switch_port_tab[i]) {
-			struct port *port = switch_port_tab[i];
-			struct net_device *dev = port->netdev;
-			unregister_netdev(dev);
-			phy_disconnect(port->phydev);
-			switch_port_tab[i] = 0;
-			free_netdev(dev);
-		}
-	}
-
-	free_netdev(napi_dev);
-	cns3xxx_mdio_remove();
-
-	return 0;
-}
-
-static struct platform_driver cns3xxx_eth_driver = {
-	.driver.name	= DRV_NAME,
-	.probe		= eth_init_one,
-	.remove		= eth_remove_one,
-};
-
-static int __init eth_init_module(void)
-{
-	return platform_driver_register(&cns3xxx_eth_driver);
-}
-
-static void __exit eth_cleanup_module(void)
-{
-	platform_driver_unregister(&cns3xxx_eth_driver);
-}
-
-module_init(eth_init_module);
-module_exit(eth_cleanup_module);
-
-MODULE_AUTHOR("Chris Lang");
-MODULE_DESCRIPTION("Cavium CNS3xxx Ethernet driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:cns3xxx_eth");