drivers/net/fs_enet/mac-scc.c - arm/linux-arm64-legacy - Git at Google

 /*
  * Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
  *
  * Copyright (c) 2003 Intracom S.A.
  *  by Pantelis Antoniou <panto@intracom.gr>
  *
  * 2005 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
  * This file is licensed under the terms of the GNU General Public License
  * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/ptrace.h>
 #include <linux/errno.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/spinlock.h>
 #include <linux/mii.h>
 #include <linux/ethtool.h>
 #include <linux/bitops.h>
 #include <linux/fs.h>
 #include <linux/platform_device.h>
 #include <linux/of_platform.h>

 #include <asm/irq.h>
 #include <asm/uaccess.h>

 #ifdef CONFIG_8xx
 #include <asm/8xx_immap.h>
 #include <asm/pgtable.h>
 #include <asm/mpc8xx.h>
 #include <asm/cpm1.h>
 #endif

 #include "fs_enet.h"

 /*************************************************/
 #if defined(CONFIG_CPM1)
 /* for a 8xx __raw_xxx's are sufficient */
 #define __fs_out32(addr, x)	__raw_writel(x, addr)
 #define __fs_out16(addr, x)	__raw_writew(x, addr)
 #define __fs_out8(addr, x)	__raw_writeb(x, addr)
 #define __fs_in32(addr)	__raw_readl(addr)
 #define __fs_in16(addr)	__raw_readw(addr)
 #define __fs_in8(addr)	__raw_readb(addr)
 #else
 /* for others play it safe */
 #define __fs_out32(addr, x)	out_be32(addr, x)
 #define __fs_out16(addr, x)	out_be16(addr, x)
 #define __fs_in32(addr)	in_be32(addr)
 #define __fs_in16(addr)	in_be16(addr)
 #define __fs_out8(addr, x)	out_8(addr, x)
 #define __fs_in8(addr)	in_8(addr)
 #endif

 /* write, read, set bits, clear bits */
 #define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
 #define R32(_p, _m)     __fs_in32(&(_p)->_m)
 #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
 #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))

 #define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
 #define R16(_p, _m)     __fs_in16(&(_p)->_m)
 #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
 #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))

 #define W8(_p, _m, _v)  __fs_out8(&(_p)->_m, (_v))
 #define R8(_p, _m)      __fs_in8(&(_p)->_m)
 #define S8(_p, _m, _v)  W8(_p, _m, R8(_p, _m) | (_v))
 #define C8(_p, _m, _v)  W8(_p, _m, R8(_p, _m) & ~(_v))

 #define SCC_MAX_MULTICAST_ADDRS	64

 /*
  * Delay to wait for SCC reset command to complete (in us)
  */
 #define SCC_RESET_DELAY		50

 static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
 {
 	const struct fs_platform_info *fpi = fep->fpi;

 	return cpm_command(fpi->cp_command, op);
 }

 static int do_pd_setup(struct fs_enet_private *fep)
 {
 	struct of_device *ofdev = to_of_device(fep->dev);

 	fep->interrupt = of_irq_to_resource(ofdev->dev.of_node, 0, NULL);
 	if (fep->interrupt == NO_IRQ)
 		return -EINVAL;

 	fep->scc.sccp = of_iomap(ofdev->dev.of_node, 0);
 	if (!fep->scc.sccp)
 		return -EINVAL;

 	fep->scc.ep = of_iomap(ofdev->dev.of_node, 1);
 	if (!fep->scc.ep) {
 		iounmap(fep->scc.sccp);
 		return -EINVAL;
 	}

 	return 0;
 }

 #define SCC_NAPI_RX_EVENT_MSK	(SCCE_ENET_RXF | SCCE_ENET_RXB)
 #define SCC_RX_EVENT		(SCCE_ENET_RXF)
 #define SCC_TX_EVENT		(SCCE_ENET_TXB)
 #define SCC_ERR_EVENT_MSK	(SCCE_ENET_TXE | SCCE_ENET_BSY)

 static int setup_data(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);

 	do_pd_setup(fep);

 	fep->scc.hthi = 0;
 	fep->scc.htlo = 0;

 	fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
 	fep->ev_rx = SCC_RX_EVENT;
 	fep->ev_tx = SCC_TX_EVENT | SCCE_ENET_TXE;
 	fep->ev_err = SCC_ERR_EVENT_MSK;

 	return 0;
 }

 static int allocate_bd(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	const struct fs_platform_info *fpi = fep->fpi;

 	fep->ring_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
 					 sizeof(cbd_t), 8);
 	if (IS_ERR_VALUE(fep->ring_mem_addr))
 		return -ENOMEM;

 	fep->ring_base = (void __iomem __force*)
 		cpm_dpram_addr(fep->ring_mem_addr);

 	return 0;
 }

 static void free_bd(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);

 	if (fep->ring_base)
 		cpm_dpfree(fep->ring_mem_addr);
 }

 static void cleanup_data(struct net_device *dev)
 {
 	/* nothing */
 }

 static void set_promiscuous_mode(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;

 	S16(sccp, scc_psmr, SCC_PSMR_PRO);
 }

 static void set_multicast_start(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_enet_t __iomem *ep = fep->scc.ep;

 	W16(ep, sen_gaddr1, 0);
 	W16(ep, sen_gaddr2, 0);
 	W16(ep, sen_gaddr3, 0);
 	W16(ep, sen_gaddr4, 0);
 }

 static void set_multicast_one(struct net_device *dev, const u8 * mac)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_enet_t __iomem *ep = fep->scc.ep;
 	u16 taddrh, taddrm, taddrl;

 	taddrh = ((u16) mac[5] << 8) | mac[4];
 	taddrm = ((u16) mac[3] << 8) | mac[2];
 	taddrl = ((u16) mac[1] << 8) | mac[0];

 	W16(ep, sen_taddrh, taddrh);
 	W16(ep, sen_taddrm, taddrm);
 	W16(ep, sen_taddrl, taddrl);
 	scc_cr_cmd(fep, CPM_CR_SET_GADDR);
 }

 static void set_multicast_finish(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;
 	scc_enet_t __iomem *ep = fep->scc.ep;

 	/* clear promiscuous always */
 	C16(sccp, scc_psmr, SCC_PSMR_PRO);

 	/* if all multi or too many multicasts; just enable all */
 	if ((dev->flags & IFF_ALLMULTI) != 0 ||
 	    netdev_mc_count(dev) > SCC_MAX_MULTICAST_ADDRS) {

 		W16(ep, sen_gaddr1, 0xffff);
 		W16(ep, sen_gaddr2, 0xffff);
 		W16(ep, sen_gaddr3, 0xffff);
 		W16(ep, sen_gaddr4, 0xffff);
 	}
 }

 static void set_multicast_list(struct net_device *dev)
 {
 	struct netdev_hw_addr *ha;

 	if ((dev->flags & IFF_PROMISC) == 0) {
 		set_multicast_start(dev);
 		netdev_for_each_mc_addr(ha, dev)
 			set_multicast_one(dev, ha->addr);
 		set_multicast_finish(dev);
 	} else
 		set_promiscuous_mode(dev);
 }

 /*
  * This function is called to start or restart the FEC during a link
  * change.  This only happens when switching between half and full
  * duplex.
  */
 static void restart(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;
 	scc_enet_t __iomem *ep = fep->scc.ep;
 	const struct fs_platform_info *fpi = fep->fpi;
 	u16 paddrh, paddrm, paddrl;
 	const unsigned char *mac;
 	int i;

 	C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);

 	/* clear everything (slow & steady does it) */
 	for (i = 0; i < sizeof(*ep); i++)
 		__fs_out8((u8 __iomem *)ep + i, 0);

 	/* point to bds */
 	W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
 	W16(ep, sen_genscc.scc_tbase,
 	    fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);

 	/* Initialize function code registers for big-endian.
 	 */
 #ifndef CONFIG_NOT_COHERENT_CACHE
 	W8(ep, sen_genscc.scc_rfcr, SCC_EB | SCC_GBL);
 	W8(ep, sen_genscc.scc_tfcr, SCC_EB | SCC_GBL);
 #else
 	W8(ep, sen_genscc.scc_rfcr, SCC_EB);
 	W8(ep, sen_genscc.scc_tfcr, SCC_EB);
 #endif

 	/* Set maximum bytes per receive buffer.
 	 * This appears to be an Ethernet frame size, not the buffer
 	 * fragment size.  It must be a multiple of four.
 	 */
 	W16(ep, sen_genscc.scc_mrblr, 0x5f0);

 	/* Set CRC preset and mask.
 	 */
 	W32(ep, sen_cpres, 0xffffffff);
 	W32(ep, sen_cmask, 0xdebb20e3);

 	W32(ep, sen_crcec, 0);	/* CRC Error counter */
 	W32(ep, sen_alec, 0);	/* alignment error counter */
 	W32(ep, sen_disfc, 0);	/* discard frame counter */

 	W16(ep, sen_pads, 0x8888);	/* Tx short frame pad character */
 	W16(ep, sen_retlim, 15);	/* Retry limit threshold */

 	W16(ep, sen_maxflr, 0x5ee);	/* maximum frame length register */

 	W16(ep, sen_minflr, PKT_MINBUF_SIZE);	/* minimum frame length register */

 	W16(ep, sen_maxd1, 0x000005f0);	/* maximum DMA1 length */
 	W16(ep, sen_maxd2, 0x000005f0);	/* maximum DMA2 length */

 	/* Clear hash tables.
 	 */
 	W16(ep, sen_gaddr1, 0);
 	W16(ep, sen_gaddr2, 0);
 	W16(ep, sen_gaddr3, 0);
 	W16(ep, sen_gaddr4, 0);
 	W16(ep, sen_iaddr1, 0);
 	W16(ep, sen_iaddr2, 0);
 	W16(ep, sen_iaddr3, 0);
 	W16(ep, sen_iaddr4, 0);

 	/* set address
 	 */
 	mac = dev->dev_addr;
 	paddrh = ((u16) mac[5] << 8) | mac[4];
 	paddrm = ((u16) mac[3] << 8) | mac[2];
 	paddrl = ((u16) mac[1] << 8) | mac[0];

 	W16(ep, sen_paddrh, paddrh);
 	W16(ep, sen_paddrm, paddrm);
 	W16(ep, sen_paddrl, paddrl);

 	W16(ep, sen_pper, 0);
 	W16(ep, sen_taddrl, 0);
 	W16(ep, sen_taddrm, 0);
 	W16(ep, sen_taddrh, 0);

 	fs_init_bds(dev);

 	scc_cr_cmd(fep, CPM_CR_INIT_TRX);

 	W16(sccp, scc_scce, 0xffff);

 	/* Enable interrupts we wish to service.
 	 */
 	W16(sccp, scc_sccm, SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);

 	/* Set GSMR_H to enable all normal operating modes.
 	 * Set GSMR_L to enable Ethernet to MC68160.
 	 */
 	W32(sccp, scc_gsmrh, 0);
 	W32(sccp, scc_gsmrl,
 	    SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 |
 	    SCC_GSMRL_MODE_ENET);

 	/* Set sync/delimiters.
 	 */
 	W16(sccp, scc_dsr, 0xd555);

 	/* Set processing mode.  Use Ethernet CRC, catch broadcast, and
 	 * start frame search 22 bit times after RENA.
 	 */
 	W16(sccp, scc_psmr, SCC_PSMR_ENCRC | SCC_PSMR_NIB22);

 	/* Set full duplex mode if needed */
 	if (fep->phydev->duplex)
 		S16(sccp, scc_psmr, SCC_PSMR_LPB | SCC_PSMR_FDE);

 	S32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 }

 static void stop(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;
 	int i;

 	for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
 		udelay(1);

 	if (i == SCC_RESET_DELAY)
 		dev_warn(fep->dev, "SCC timeout on graceful transmit stop\n");

 	W16(sccp, scc_sccm, 0);
 	C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);

 	fs_cleanup_bds(dev);
 }

 static void napi_clear_rx_event(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;

 	W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
 }

 static void napi_enable_rx(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;

 	S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
 }

 static void napi_disable_rx(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;

 	C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
 }

 static void rx_bd_done(struct net_device *dev)
 {
 	/* nothing */
 }

 static void tx_kickstart(struct net_device *dev)
 {
 	/* nothing */
 }

 static u32 get_int_events(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;

 	return (u32) R16(sccp, scc_scce);
 }

 static void clear_int_events(struct net_device *dev, u32 int_events)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t __iomem *sccp = fep->scc.sccp;

 	W16(sccp, scc_scce, int_events & 0xffff);
 }

 static void ev_error(struct net_device *dev, u32 int_events)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);

 	dev_warn(fep->dev, "SCC ERROR(s) 0x%x\n", int_events);
 }

 static int get_regs(struct net_device *dev, void *p, int *sizep)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);

 	if (*sizep < sizeof(scc_t) + sizeof(scc_enet_t __iomem *))
 		return -EINVAL;

 	memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
 	p = (char *)p + sizeof(scc_t);

 	memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t __iomem *));

 	return 0;
 }

 static int get_regs_len(struct net_device *dev)
 {
 	return sizeof(scc_t) + sizeof(scc_enet_t __iomem *);
 }

 static void tx_restart(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);

 	scc_cr_cmd(fep, CPM_CR_RESTART_TX);
 }


 /*************************************************************************/

 const struct fs_ops fs_scc_ops = {
 	.setup_data		= setup_data,
 	.cleanup_data		= cleanup_data,
 	.set_multicast_list	= set_multicast_list,
 	.restart		= restart,
 	.stop			= stop,
 	.napi_clear_rx_event	= napi_clear_rx_event,
 	.napi_enable_rx		= napi_enable_rx,
 	.napi_disable_rx	= napi_disable_rx,
 	.rx_bd_done		= rx_bd_done,
 	.tx_kickstart		= tx_kickstart,
 	.get_int_events		= get_int_events,
 	.clear_int_events	= clear_int_events,
 	.ev_error		= ev_error,
 	.get_regs		= get_regs,
 	.get_regs_len		= get_regs_len,
 	.tx_restart		= tx_restart,
 	.allocate_bd		= allocate_bd,
 	.free_bd		= free_bd,
 };
	/*
	* Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
	*
	* Copyright (c) 2003 Intracom S.A.
	* by Pantelis Antoniou <panto@intracom.gr>
	*
	* 2005 (c) MontaVista Software, Inc.
	* Vitaly Bordug <vbordug@ru.mvista.com>
	*
	* This file is licensed under the terms of the GNU General Public License
	* version 2. This program is licensed "as is" without any warranty of any
	* kind, whether express or implied.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/string.h>
	#include <linux/ptrace.h>
	#include <linux/errno.h>
	#include <linux/ioport.h>
	#include <linux/interrupt.h>
	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/netdevice.h>
	#include <linux/etherdevice.h>
	#include <linux/skbuff.h>
	#include <linux/spinlock.h>
	#include <linux/mii.h>
	#include <linux/ethtool.h>
	#include <linux/bitops.h>
	#include <linux/fs.h>
	#include <linux/platform_device.h>
	#include <linux/of_platform.h>

	#include <asm/irq.h>
	#include <asm/uaccess.h>

	#ifdef CONFIG_8xx
	#include <asm/8xx_immap.h>
	#include <asm/pgtable.h>
	#include <asm/mpc8xx.h>
	#include <asm/cpm1.h>
	#endif

	#include "fs_enet.h"

	/*************************************************/
	#if defined(CONFIG_CPM1)
	/* for a 8xx __raw_xxx's are sufficient */
	#define __fs_out32(addr, x) __raw_writel(x, addr)
	#define __fs_out16(addr, x) __raw_writew(x, addr)
	#define __fs_out8(addr, x) __raw_writeb(x, addr)
	#define __fs_in32(addr) __raw_readl(addr)
	#define __fs_in16(addr) __raw_readw(addr)
	#define __fs_in8(addr) __raw_readb(addr)
	#else
	/* for others play it safe */
	#define __fs_out32(addr, x) out_be32(addr, x)
	#define __fs_out16(addr, x) out_be16(addr, x)
	#define __fs_in32(addr) in_be32(addr)
	#define __fs_in16(addr) in_be16(addr)
	#define __fs_out8(addr, x) out_8(addr, x)
	#define __fs_in8(addr) in_8(addr)
	#endif

	/* write, read, set bits, clear bits */
	#define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
	#define R32(_p, _m) __fs_in32(&(_p)->_m)
	#define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) \| (_v))
	#define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))

	#define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
	#define R16(_p, _m) __fs_in16(&(_p)->_m)
	#define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) \| (_v))
	#define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))

	#define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
	#define R8(_p, _m) __fs_in8(&(_p)->_m)
	#define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) \| (_v))
	#define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))

	#define SCC_MAX_MULTICAST_ADDRS 64

	/*
	* Delay to wait for SCC reset command to complete (in us)
	*/
	#define SCC_RESET_DELAY 50

	static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
	{
	const struct fs_platform_info *fpi = fep->fpi;

	return cpm_command(fpi->cp_command, op);
	}

	static int do_pd_setup(struct fs_enet_private *fep)
	{
	struct of_device *ofdev = to_of_device(fep->dev);

	fep->interrupt = of_irq_to_resource(ofdev->dev.of_node, 0, NULL);
	if (fep->interrupt == NO_IRQ)
	return -EINVAL;

	fep->scc.sccp = of_iomap(ofdev->dev.of_node, 0);
	if (!fep->scc.sccp)
	return -EINVAL;

	fep->scc.ep = of_iomap(ofdev->dev.of_node, 1);
	if (!fep->scc.ep) {
	iounmap(fep->scc.sccp);
	return -EINVAL;
	}

	return 0;
	}

	#define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF \| SCCE_ENET_RXB)
	#define SCC_RX_EVENT (SCCE_ENET_RXF)
	#define SCC_TX_EVENT (SCCE_ENET_TXB)
	#define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE \| SCCE_ENET_BSY)

	static int setup_data(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);

	do_pd_setup(fep);

	fep->scc.hthi = 0;
	fep->scc.htlo = 0;

	fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
	fep->ev_rx = SCC_RX_EVENT;
	fep->ev_tx = SCC_TX_EVENT \| SCCE_ENET_TXE;
	fep->ev_err = SCC_ERR_EVENT_MSK;

	return 0;
	}

	static int allocate_bd(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	const struct fs_platform_info *fpi = fep->fpi;

	fep->ring_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
	sizeof(cbd_t), 8);
	if (IS_ERR_VALUE(fep->ring_mem_addr))
	return -ENOMEM;

	fep->ring_base = (void __iomem __force*)
	cpm_dpram_addr(fep->ring_mem_addr);

	return 0;
	}

	static void free_bd(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);

	if (fep->ring_base)
	cpm_dpfree(fep->ring_mem_addr);
	}

	static void cleanup_data(struct net_device *dev)
	{
	/* nothing */
	}

	static void set_promiscuous_mode(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;

	S16(sccp, scc_psmr, SCC_PSMR_PRO);
	}

	static void set_multicast_start(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_enet_t __iomem *ep = fep->scc.ep;

	W16(ep, sen_gaddr1, 0);
	W16(ep, sen_gaddr2, 0);
	W16(ep, sen_gaddr3, 0);
	W16(ep, sen_gaddr4, 0);
	}

	static void set_multicast_one(struct net_device dev, const u8 mac)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_enet_t __iomem *ep = fep->scc.ep;
	u16 taddrh, taddrm, taddrl;

	taddrh = ((u16) mac[5] << 8) \| mac[4];
	taddrm = ((u16) mac[3] << 8) \| mac[2];
	taddrl = ((u16) mac[1] << 8) \| mac[0];

	W16(ep, sen_taddrh, taddrh);
	W16(ep, sen_taddrm, taddrm);
	W16(ep, sen_taddrl, taddrl);
	scc_cr_cmd(fep, CPM_CR_SET_GADDR);
	}

	static void set_multicast_finish(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;
	scc_enet_t __iomem *ep = fep->scc.ep;

	/* clear promiscuous always */
	C16(sccp, scc_psmr, SCC_PSMR_PRO);

	/* if all multi or too many multicasts; just enable all */
	if ((dev->flags & IFF_ALLMULTI) != 0 \|\|
	netdev_mc_count(dev) > SCC_MAX_MULTICAST_ADDRS) {

	W16(ep, sen_gaddr1, 0xffff);
	W16(ep, sen_gaddr2, 0xffff);
	W16(ep, sen_gaddr3, 0xffff);
	W16(ep, sen_gaddr4, 0xffff);
	}
	}

	static void set_multicast_list(struct net_device *dev)
	{
	struct netdev_hw_addr *ha;

	if ((dev->flags & IFF_PROMISC) == 0) {
	set_multicast_start(dev);
	netdev_for_each_mc_addr(ha, dev)
	set_multicast_one(dev, ha->addr);
	set_multicast_finish(dev);
	} else
	set_promiscuous_mode(dev);
	}

	/*
	* This function is called to start or restart the FEC during a link
	* change. This only happens when switching between half and full
	* duplex.
	*/
	static void restart(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;
	scc_enet_t __iomem *ep = fep->scc.ep;
	const struct fs_platform_info *fpi = fep->fpi;
	u16 paddrh, paddrm, paddrl;
	const unsigned char *mac;
	int i;

	C32(sccp, scc_gsmrl, SCC_GSMRL_ENR \| SCC_GSMRL_ENT);

	/* clear everything (slow & steady does it) */
	for (i = 0; i < sizeof(*ep); i++)
	__fs_out8((u8 __iomem *)ep + i, 0);

	/* point to bds */
	W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
	W16(ep, sen_genscc.scc_tbase,
	fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);

	/* Initialize function code registers for big-endian.
	*/
	#ifndef CONFIG_NOT_COHERENT_CACHE
	W8(ep, sen_genscc.scc_rfcr, SCC_EB \| SCC_GBL);
	W8(ep, sen_genscc.scc_tfcr, SCC_EB \| SCC_GBL);
	#else
	W8(ep, sen_genscc.scc_rfcr, SCC_EB);
	W8(ep, sen_genscc.scc_tfcr, SCC_EB);
	#endif

	/* Set maximum bytes per receive buffer.
	* This appears to be an Ethernet frame size, not the buffer
	* fragment size. It must be a multiple of four.
	*/
	W16(ep, sen_genscc.scc_mrblr, 0x5f0);

	/* Set CRC preset and mask.
	*/
	W32(ep, sen_cpres, 0xffffffff);
	W32(ep, sen_cmask, 0xdebb20e3);

	W32(ep, sen_crcec, 0); /* CRC Error counter */
	W32(ep, sen_alec, 0); /* alignment error counter */
	W32(ep, sen_disfc, 0); /* discard frame counter */

	W16(ep, sen_pads, 0x8888); /* Tx short frame pad character */
	W16(ep, sen_retlim, 15); /* Retry limit threshold */

	W16(ep, sen_maxflr, 0x5ee); /* maximum frame length register */

	W16(ep, sen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */

	W16(ep, sen_maxd1, 0x000005f0); /* maximum DMA1 length */
	W16(ep, sen_maxd2, 0x000005f0); /* maximum DMA2 length */

	/* Clear hash tables.
	*/
	W16(ep, sen_gaddr1, 0);
	W16(ep, sen_gaddr2, 0);
	W16(ep, sen_gaddr3, 0);
	W16(ep, sen_gaddr4, 0);
	W16(ep, sen_iaddr1, 0);
	W16(ep, sen_iaddr2, 0);
	W16(ep, sen_iaddr3, 0);
	W16(ep, sen_iaddr4, 0);

	/* set address
	*/
	mac = dev->dev_addr;
	paddrh = ((u16) mac[5] << 8) \| mac[4];
	paddrm = ((u16) mac[3] << 8) \| mac[2];
	paddrl = ((u16) mac[1] << 8) \| mac[0];

	W16(ep, sen_paddrh, paddrh);
	W16(ep, sen_paddrm, paddrm);
	W16(ep, sen_paddrl, paddrl);

	W16(ep, sen_pper, 0);
	W16(ep, sen_taddrl, 0);
	W16(ep, sen_taddrm, 0);
	W16(ep, sen_taddrh, 0);

	fs_init_bds(dev);

	scc_cr_cmd(fep, CPM_CR_INIT_TRX);

	W16(sccp, scc_scce, 0xffff);

	/* Enable interrupts we wish to service.
	*/
	W16(sccp, scc_sccm, SCCE_ENET_TXE \| SCCE_ENET_RXF \| SCCE_ENET_TXB);

	/* Set GSMR_H to enable all normal operating modes.
	* Set GSMR_L to enable Ethernet to MC68160.
	*/
	W32(sccp, scc_gsmrh, 0);
	W32(sccp, scc_gsmrl,
	SCC_GSMRL_TCI \| SCC_GSMRL_TPL_48 \| SCC_GSMRL_TPP_10 \|
	SCC_GSMRL_MODE_ENET);

	/* Set sync/delimiters.
	*/
	W16(sccp, scc_dsr, 0xd555);

	/* Set processing mode. Use Ethernet CRC, catch broadcast, and
	* start frame search 22 bit times after RENA.
	*/
	W16(sccp, scc_psmr, SCC_PSMR_ENCRC \| SCC_PSMR_NIB22);

	/* Set full duplex mode if needed */
	if (fep->phydev->duplex)
	S16(sccp, scc_psmr, SCC_PSMR_LPB \| SCC_PSMR_FDE);

	S32(sccp, scc_gsmrl, SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	}

	static void stop(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;
	int i;

	for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
	udelay(1);

	if (i == SCC_RESET_DELAY)
	dev_warn(fep->dev, "SCC timeout on graceful transmit stop\n");

	W16(sccp, scc_sccm, 0);
	C32(sccp, scc_gsmrl, SCC_GSMRL_ENR \| SCC_GSMRL_ENT);

	fs_cleanup_bds(dev);
	}

	static void napi_clear_rx_event(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;

	W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
	}

	static void napi_enable_rx(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;

	S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
	}

	static void napi_disable_rx(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;

	C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
	}

	static void rx_bd_done(struct net_device *dev)
	{
	/* nothing */
	}

	static void tx_kickstart(struct net_device *dev)
	{
	/* nothing */
	}

	static u32 get_int_events(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;

	return (u32) R16(sccp, scc_scce);
	}

	static void clear_int_events(struct net_device *dev, u32 int_events)
	{
	struct fs_enet_private *fep = netdev_priv(dev);
	scc_t __iomem *sccp = fep->scc.sccp;

	W16(sccp, scc_scce, int_events & 0xffff);
	}

	static void ev_error(struct net_device *dev, u32 int_events)
	{
	struct fs_enet_private *fep = netdev_priv(dev);

	dev_warn(fep->dev, "SCC ERROR(s) 0x%x\n", int_events);
	}

	static int get_regs(struct net_device dev, void p, int *sizep)
	{
	struct fs_enet_private *fep = netdev_priv(dev);

	if (sizep < sizeof(scc_t) + sizeof(scc_enet_t __iomem ))
	return -EINVAL;

	memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
	p = (char *)p + sizeof(scc_t);

	memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t __iomem *));

	return 0;
	}

	static int get_regs_len(struct net_device *dev)
	{
	return sizeof(scc_t) + sizeof(scc_enet_t __iomem *);
	}

	static void tx_restart(struct net_device *dev)
	{
	struct fs_enet_private *fep = netdev_priv(dev);

	scc_cr_cmd(fep, CPM_CR_RESTART_TX);
	}



	/*************************************************************************/

	const struct fs_ops fs_scc_ops = {
	.setup_data = setup_data,
	.cleanup_data = cleanup_data,
	.set_multicast_list = set_multicast_list,
	.restart = restart,
	.stop = stop,
	.napi_clear_rx_event = napi_clear_rx_event,
	.napi_enable_rx = napi_enable_rx,
	.napi_disable_rx = napi_disable_rx,
	.rx_bd_done = rx_bd_done,
	.tx_kickstart = tx_kickstart,
	.get_int_events = get_int_events,
	.clear_int_events = clear_int_events,
	.ev_error = ev_error,
	.get_regs = get_regs,
	.get_regs_len = get_regs_len,
	.tx_restart = tx_restart,
	.allocate_bd = allocate_bd,
	.free_bd = free_bd,
	};