xscale: Move the Intel XScale IXP drivers

Move the Intel XScale IXP drivers into drivers/net/ethernet/xscale/
and make the necessary Kconfig and Makefile changes.

CC: Krzysztof Halasa <khc@pm.waw.pl>
CC: Lennert Buytenhek <kernel@wantstofly.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 440 deletions

diff --git a/drivers/net/ixp2000/ixpdev.c b/drivers/net/ixp2000/ixpdev.c
deleted file mode 100644
index e122493..0000000
--- a/drivers/net/ixp2000/ixpdev.c
+++ /dev/null
@@ -1,440 +0,0 @@
-/*
- * IXP2000 MSF network device driver
- * Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
- * Dedicated to Marija Kulikova.
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/moduleparam.h>
-#include <linux/gfp.h>
-#include <asm/hardware/uengine.h>
-#include <asm/io.h>
-#include "ixp2400_rx.ucode"
-#include "ixp2400_tx.ucode"
-#include "ixpdev_priv.h"
-#include "ixpdev.h"
-#include "pm3386.h"
-
-#define DRV_MODULE_VERSION	"0.2"
-
-static int nds_count;
-static struct net_device **nds;
-static int nds_open;
-static void (*set_port_admin_status)(int port, int up);
-
-static struct ixpdev_rx_desc * const rx_desc =
-	(struct ixpdev_rx_desc *)(IXP2000_SRAM0_VIRT_BASE + RX_BUF_DESC_BASE);
-static struct ixpdev_tx_desc * const tx_desc =
-	(struct ixpdev_tx_desc *)(IXP2000_SRAM0_VIRT_BASE + TX_BUF_DESC_BASE);
-static int tx_pointer;
-
-
-static int ixpdev_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct ixpdev_priv *ip = netdev_priv(dev);
-	struct ixpdev_tx_desc *desc;
-	int entry;
-	unsigned long flags;
-
-	if (unlikely(skb->len > PAGE_SIZE)) {
-		/* @@@ Count drops.  */
-		dev_kfree_skb(skb);
-		return NETDEV_TX_OK;
-	}
-
-	entry = tx_pointer;
-	tx_pointer = (tx_pointer + 1) % TX_BUF_COUNT;
-
-	desc = tx_desc + entry;
-	desc->pkt_length = skb->len;
-	desc->channel = ip->channel;
-
-	skb_copy_and_csum_dev(skb, phys_to_virt(desc->buf_addr));
-	dev_kfree_skb(skb);
-
-	ixp2000_reg_write(RING_TX_PENDING,
-		TX_BUF_DESC_BASE + (entry * sizeof(struct ixpdev_tx_desc)));
-
-	local_irq_save(flags);
-	ip->tx_queue_entries++;
-	if (ip->tx_queue_entries == TX_BUF_COUNT_PER_CHAN)
-		netif_stop_queue(dev);
-	local_irq_restore(flags);
-
-	return NETDEV_TX_OK;
-}
-
-
-static int ixpdev_rx(struct net_device *dev, int processed, int budget)
-{
-	while (processed < budget) {
-		struct ixpdev_rx_desc *desc;
-		struct sk_buff *skb;
-		void *buf;
-		u32 _desc;
-
-		_desc = ixp2000_reg_read(RING_RX_DONE);
-		if (_desc == 0)
-			return 0;
-
-		desc = rx_desc +
-			((_desc - RX_BUF_DESC_BASE) / sizeof(struct ixpdev_rx_desc));
-		buf = phys_to_virt(desc->buf_addr);
-
-		if (desc->pkt_length < 4 || desc->pkt_length > PAGE_SIZE) {
-			printk(KERN_ERR "ixp2000: rx err, length %d\n",
-					desc->pkt_length);
-			goto err;
-		}
-
-		if (desc->channel < 0 || desc->channel >= nds_count) {
-			printk(KERN_ERR "ixp2000: rx err, channel %d\n",
-					desc->channel);
-			goto err;
-		}
-
-		/* @@@ Make FCS stripping configurable.  */
-		desc->pkt_length -= 4;
-
-		if (unlikely(!netif_running(nds[desc->channel])))
-			goto err;
-
-		skb = netdev_alloc_skb_ip_align(dev, desc->pkt_length);
-		if (likely(skb != NULL)) {
-			skb_copy_to_linear_data(skb, buf, desc->pkt_length);
-			skb_put(skb, desc->pkt_length);
-			skb->protocol = eth_type_trans(skb, nds[desc->channel]);
-
-			netif_receive_skb(skb);
-		}
-
-err:
-		ixp2000_reg_write(RING_RX_PENDING, _desc);
-		processed++;
-	}
-
-	return processed;
-}
-
-/* dev always points to nds[0].  */
-static int ixpdev_poll(struct napi_struct *napi, int budget)
-{
-	struct ixpdev_priv *ip = container_of(napi, struct ixpdev_priv, napi);
-	struct net_device *dev = ip->dev;
-	int rx;
-
-	rx = 0;
-	do {
-		ixp2000_reg_write(IXP2000_IRQ_THD_RAW_STATUS_A_0, 0x00ff);
-
-		rx = ixpdev_rx(dev, rx, budget);
-		if (rx >= budget)
-			break;
-	} while (ixp2000_reg_read(IXP2000_IRQ_THD_RAW_STATUS_A_0) & 0x00ff);
-
-	napi_complete(napi);
-	ixp2000_reg_write(IXP2000_IRQ_THD_ENABLE_SET_A_0, 0x00ff);
-
-	return rx;
-}
-
-static void ixpdev_tx_complete(void)
-{
-	int channel;
-	u32 wake;
-
-	wake = 0;
-	while (1) {
-		struct ixpdev_priv *ip;
-		u32 desc;
-		int entry;
-
-		desc = ixp2000_reg_read(RING_TX_DONE);
-		if (desc == 0)
-			break;
-
-		/* @@@ Check whether entries come back in order.  */
-		entry = (desc - TX_BUF_DESC_BASE) / sizeof(struct ixpdev_tx_desc);
-		channel = tx_desc[entry].channel;
-
-		if (channel < 0 || channel >= nds_count) {
-			printk(KERN_ERR "ixp2000: txcomp channel index "
-					"out of bounds (%d, %.8i, %d)\n",
-					channel, (unsigned int)desc, entry);
-			continue;
-		}
-
-		ip = netdev_priv(nds[channel]);
-		if (ip->tx_queue_entries == TX_BUF_COUNT_PER_CHAN)
-			wake |= 1 << channel;
-		ip->tx_queue_entries--;
-	}
-
-	for (channel = 0; wake != 0; channel++) {
-		if (wake & (1 << channel)) {
-			netif_wake_queue(nds[channel]);
-			wake &= ~(1 << channel);
-		}
-	}
-}
-
-static irqreturn_t ixpdev_interrupt(int irq, void *dev_id)
-{
-	u32 status;
-
-	status = ixp2000_reg_read(IXP2000_IRQ_THD_STATUS_A_0);
-	if (status == 0)
-		return IRQ_NONE;
-
-	/*
-	 * Any of the eight receive units signaled RX?
-	 */
-	if (status & 0x00ff) {
-		struct net_device *dev = nds[0];
-		struct ixpdev_priv *ip = netdev_priv(dev);
-
-		ixp2000_reg_wrb(IXP2000_IRQ_THD_ENABLE_CLEAR_A_0, 0x00ff);
-		if (likely(napi_schedule_prep(&ip->napi))) {
-			__napi_schedule(&ip->napi);
-		} else {
-			printk(KERN_CRIT "ixp2000: irq while polling!!\n");
-		}
-	}
-
-	/*
-	 * Any of the eight transmit units signaled TXdone?
-	 */
-	if (status & 0xff00) {
-		ixp2000_reg_wrb(IXP2000_IRQ_THD_RAW_STATUS_A_0, 0xff00);
-		ixpdev_tx_complete();
-	}
-
-	return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void ixpdev_poll_controller(struct net_device *dev)
-{
-	disable_irq(IRQ_IXP2000_THDA0);
-	ixpdev_interrupt(IRQ_IXP2000_THDA0, dev);
-	enable_irq(IRQ_IXP2000_THDA0);
-}
-#endif
-
-static int ixpdev_open(struct net_device *dev)
-{
-	struct ixpdev_priv *ip = netdev_priv(dev);
-	int err;
-
-	napi_enable(&ip->napi);
-	if (!nds_open++) {
-		err = request_irq(IRQ_IXP2000_THDA0, ixpdev_interrupt,
-					IRQF_SHARED, "ixp2000_eth", nds);
-		if (err) {
-			nds_open--;
-			napi_disable(&ip->napi);
-			return err;
-		}
-
-		ixp2000_reg_write(IXP2000_IRQ_THD_ENABLE_SET_A_0, 0xffff);
-	}
-
-	set_port_admin_status(ip->channel, 1);
-	netif_start_queue(dev);
-
-	return 0;
-}
-
-static int ixpdev_close(struct net_device *dev)
-{
-	struct ixpdev_priv *ip = netdev_priv(dev);
-
-	netif_stop_queue(dev);
-	napi_disable(&ip->napi);
-	set_port_admin_status(ip->channel, 0);
-
-	if (!--nds_open) {
-		ixp2000_reg_write(IXP2000_IRQ_THD_ENABLE_CLEAR_A_0, 0xffff);
-		free_irq(IRQ_IXP2000_THDA0, nds);
-	}
-
-	return 0;
-}
-
-static struct net_device_stats *ixpdev_get_stats(struct net_device *dev)
-{
-	struct ixpdev_priv *ip = netdev_priv(dev);
-
-	pm3386_get_stats(ip->channel, &(dev->stats));
-
-	return &(dev->stats);
-}
-
-static const struct net_device_ops ixpdev_netdev_ops = {
-	.ndo_open		= ixpdev_open,
-	.ndo_stop		= ixpdev_close,
-	.ndo_start_xmit		= ixpdev_xmit,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_set_mac_address	= eth_mac_addr,
-	.ndo_get_stats		= ixpdev_get_stats,
-#ifdef CONFIG_NET_POLL_CONTROLLER
-	.ndo_poll_controller	= ixpdev_poll_controller,
-#endif
-};
-
-struct net_device *ixpdev_alloc(int channel, int sizeof_priv)
-{
-	struct net_device *dev;
-	struct ixpdev_priv *ip;
-
-	dev = alloc_etherdev(sizeof_priv);
-	if (dev == NULL)
-		return NULL;
-
-	dev->netdev_ops = &ixpdev_netdev_ops;
-
-	dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
-
-	ip = netdev_priv(dev);
-	ip->dev = dev;
-	netif_napi_add(dev, &ip->napi, ixpdev_poll, 64);
-	ip->channel = channel;
-	ip->tx_queue_entries = 0;
-
-	return dev;
-}
-
-int ixpdev_init(int __nds_count, struct net_device **__nds,
-		void (*__set_port_admin_status)(int port, int up))
-{
-	int i;
-	int err;
-
-	BUILD_BUG_ON(RX_BUF_COUNT > 192 || TX_BUF_COUNT > 192);
-
-	printk(KERN_INFO "IXP2000 MSF ethernet driver %s\n", DRV_MODULE_VERSION);
-
-	nds_count = __nds_count;
-	nds = __nds;
-	set_port_admin_status = __set_port_admin_status;
-
-	for (i = 0; i < RX_BUF_COUNT; i++) {
-		void *buf;
-
-		buf = (void *)get_zeroed_page(GFP_KERNEL);
-		if (buf == NULL) {
-			err = -ENOMEM;
-			while (--i >= 0)
-				free_page((unsigned long)phys_to_virt(rx_desc[i].buf_addr));
-			goto err_out;
-		}
-		rx_desc[i].buf_addr = virt_to_phys(buf);
-		rx_desc[i].buf_length = PAGE_SIZE;
-	}
-
-	/* @@@ Maybe we shouldn't be preallocating TX buffers.  */
-	for (i = 0; i < TX_BUF_COUNT; i++) {
-		void *buf;
-
-		buf = (void *)get_zeroed_page(GFP_KERNEL);
-		if (buf == NULL) {
-			err = -ENOMEM;
-			while (--i >= 0)
-				free_page((unsigned long)phys_to_virt(tx_desc[i].buf_addr));
-			goto err_free_rx;
-		}
-		tx_desc[i].buf_addr = virt_to_phys(buf);
-	}
-
-	/* 256 entries, ring status set means 'empty', base address 0x0000.  */
-	ixp2000_reg_write(RING_RX_PENDING_BASE, 0x44000000);
-	ixp2000_reg_write(RING_RX_PENDING_HEAD, 0x00000000);
-	ixp2000_reg_write(RING_RX_PENDING_TAIL, 0x00000000);
-
-	/* 256 entries, ring status set means 'full', base address 0x0400.  */
-	ixp2000_reg_write(RING_RX_DONE_BASE, 0x40000400);
-	ixp2000_reg_write(RING_RX_DONE_HEAD, 0x00000000);
-	ixp2000_reg_write(RING_RX_DONE_TAIL, 0x00000000);
-
-	for (i = 0; i < RX_BUF_COUNT; i++) {
-		ixp2000_reg_write(RING_RX_PENDING,
-			RX_BUF_DESC_BASE + (i * sizeof(struct ixpdev_rx_desc)));
-	}
-
-	ixp2000_uengine_load(0, &ixp2400_rx);
-	ixp2000_uengine_start_contexts(0, 0xff);
-
-	/* 256 entries, ring status set means 'empty', base address 0x0800.  */
-	ixp2000_reg_write(RING_TX_PENDING_BASE, 0x44000800);
-	ixp2000_reg_write(RING_TX_PENDING_HEAD, 0x00000000);
-	ixp2000_reg_write(RING_TX_PENDING_TAIL, 0x00000000);
-
-	/* 256 entries, ring status set means 'full', base address 0x0c00.  */
-	ixp2000_reg_write(RING_TX_DONE_BASE, 0x40000c00);
-	ixp2000_reg_write(RING_TX_DONE_HEAD, 0x00000000);
-	ixp2000_reg_write(RING_TX_DONE_TAIL, 0x00000000);
-
-	ixp2000_uengine_load(1, &ixp2400_tx);
-	ixp2000_uengine_start_contexts(1, 0xff);
-
-	for (i = 0; i < nds_count; i++) {
-		err = register_netdev(nds[i]);
-		if (err) {
-			while (--i >= 0)
-				unregister_netdev(nds[i]);
-			goto err_free_tx;
-		}
-	}
-
-	for (i = 0; i < nds_count; i++) {
-		printk(KERN_INFO "%s: IXP2000 MSF ethernet (port %d), "
-			"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", nds[i]->name, i,
-			nds[i]->dev_addr[0], nds[i]->dev_addr[1],
-			nds[i]->dev_addr[2], nds[i]->dev_addr[3],
-			nds[i]->dev_addr[4], nds[i]->dev_addr[5]);
-	}
-
-	return 0;
-
-err_free_tx:
-	for (i = 0; i < TX_BUF_COUNT; i++)
-		free_page((unsigned long)phys_to_virt(tx_desc[i].buf_addr));
-
-err_free_rx:
-	for (i = 0; i < RX_BUF_COUNT; i++)
-		free_page((unsigned long)phys_to_virt(rx_desc[i].buf_addr));
-
-err_out:
-	return err;
-} 
-
-void ixpdev_deinit(void)
-{
-	int i;
-
-	/* @@@ Flush out pending packets.  */
-
-	for (i = 0; i < nds_count; i++)
-		unregister_netdev(nds[i]);
-
-	ixp2000_uengine_stop_contexts(1, 0xff);
-	ixp2000_uengine_stop_contexts(0, 0xff);
-	ixp2000_uengine_reset(0x3);
-
-	for (i = 0; i < TX_BUF_COUNT; i++)
-		free_page((unsigned long)phys_to_virt(tx_desc[i].buf_addr));
-
-	for (i = 0; i < RX_BUF_COUNT; i++)
-		free_page((unsigned long)phys_to_virt(rx_desc[i].buf_addr));
-}